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WO2015168917A1 - 一种通信方法及设备 - Google Patents

一种通信方法及设备 Download PDF

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Publication number
WO2015168917A1
WO2015168917A1 PCT/CN2014/077078 CN2014077078W WO2015168917A1 WO 2015168917 A1 WO2015168917 A1 WO 2015168917A1 CN 2014077078 W CN2014077078 W CN 2014077078W WO 2015168917 A1 WO2015168917 A1 WO 2015168917A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication
transmit power
power
uplink
user terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/077078
Other languages
English (en)
French (fr)
Inventor
刘德平
柯柏安
李强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201480030209.0A priority Critical patent/CN105284164B/zh
Priority to PCT/CN2014/077078 priority patent/WO2015168917A1/zh
Publication of WO2015168917A1 publication Critical patent/WO2015168917A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a communication method and device. Background technique
  • LTE Long Term Evolution
  • UEs user equipments
  • eNBs evolved Node Bs
  • D2D Device to Device
  • the communication data between UEs does not need to be forwarded through the eNB.
  • the communication interaction can be directly performed between the UEs or directly under the assistance of the network.
  • LTE-D2D is the third-generation partner 3rd Generation Partnership Project (3GPP) newly defined LTE-based direct communication between UEs.
  • LTE-D2D communication technology is an application of D2D added in existing LTE systems. That is, D2D communication and LTE communication may coexist.
  • UE1 may transmit D2D communication data to UE2 and UE3 for D2D communication, and UE1 may also communicate with the eNB.
  • the process in which the UE1 transmits the communication data and the eNB receives the communication data is referred to as uplink communication; the process in which the eNB transmits the communication data, and the UE1 receives the communication data is referred to as the downlink communication; the UE1 serves as the data transmitter, and the UE and the UE perform the UE and the UE3.
  • the communication between them is D2D communication.
  • the UE performing the D2D communication generally transmits the D2D data at the maximum power.
  • the eNB when performing uplink communication with the eNB, the eNB generally adjusts the uplink transmit power of each UE communicating with the eNB according to the distance and the channel condition, so that the eNB arrives at the eNB.
  • the received power of the uplink signals of each UE is relatively balanced.
  • the uplink transmit power of the UE that is closer to the eNB may be smaller than the uplink transmit power of the UE that is farther from the eNB.
  • the received power of the signal transmitted by the UE that receives the D2D communication received by the eNB is higher than Other UEs performing uplink communication
  • the received power of the transmitted uplink signal in which an In Band Emission (IBE) occurs.
  • IBE In Band Emission
  • In-band leakage means that the energy of a signal with a higher received power leaks into a signal with a lower received energy in the frequency domain, and the in-band leakage affects the normal reception of the signal of the UE performing uplink communication in the LTE system, for the UE and Uplink communication between eNBs has an adverse effect.
  • Embodiments of the present invention provide a communication method and device to reduce adverse effects of in-band leakage on uplink communications.
  • a communication device including a transceiver, a processor, a memory, and a bus, wherein the transceiver, the processor, and the memory are all connected to a bus, where
  • the memory is configured to store program code executed by the processor
  • the processor is configured to invoke a program stored in the memory, acquire an uplink transmit power parameter, and determine a transmit power of the D2D communication according to the uplink transmit power parameter and a downlink path loss estimate; and control the transceiver according to the Transmitting the transmit power of the D2D communication to transmit D2D data;
  • the transceiver is configured to transmit D2D data according to a transmit power of the D2D communication determined by the processor.
  • the processor is specifically configured to determine a transmit power of the D2D communication as follows:
  • the processor is specifically configured to determine, according to the uplink transmit power, a transmit power of the D2D communication according to the following manner: determining the uplink transmit power, The transmit power for the D2D communication.
  • the processor is specifically configured to determine, according to the uplink transmit power, a transmit power of the D2D communication, as follows: determining that the uplink transmit power belongs to Power level;
  • the processor is specifically configured to determine, according to the manner, a power level to which the uplink transmit power belongs: determine a modulation format of the D2D communication, and determine an uplink. a power level to which the transmit power belongs in a modulation format corresponding to the D2D communication;
  • the transmit power of the D2D communication is determined according to the correspondence between the uplink transmit power, the modulation format of the D2D communication, and the power level in each modulation format and the transmit power of the D2D communication.
  • the processor is further configured to: obtain a power offset
  • the processor is specifically configured to determine, according to the uplink transmit power parameter, a transmit bandwidth of the D2D communication, a downlink path loss estimate, and the power offset, to determine a transmit of the D2D communication. Power; or
  • the transmit power of the D2D communication is determined according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimate, and the power offset amount.
  • the processor is specifically configured to determine a transmit power of the D2D communication as follows:
  • the processor is further configured to:
  • the transceiver is specifically configured to transmit D2D data as follows:
  • the processor is configured to determine the number of transmissions or the number of retransmissions as follows:
  • the second correspondence is a correspondence between the transmission power of the D2D communication and the number of transmissions, or a correspondence between the transmission power of the D2D communication and the number of retransmissions relationship.
  • the transceiver is further configured to:
  • the transmission number information is used by the second user terminal to receive data according to the transmission times information, and the second user terminal is a terminal that performs D2D communication with the first user terminal;
  • the retransmission times information is used by the second user terminal to receive data according to the retransmission times information, and the second user terminal is a terminal that performs D2D communication with the first user terminal.
  • a communication device in a second aspect, includes a transceiver, a processor, a memory, and a bus, wherein the transceiver, the processor, and the memory are all connected to the bus, where
  • the memory is configured to store program code executed by the processor
  • the processor the program stored in the memory is used to determine an uplink transmit power parameter
  • the transceiver is configured to send the uplink transmit power parameter
  • the uplink transmit power parameter is used for device-to-device D2D communication First user terminal according to downlink path loss and the uplink transmission
  • the power parameter determines the transmit power of the D2D communication.
  • the processor is further configured to: determine a power offset amount
  • the transceiver is further configured to: deliver the power offset amount;
  • the power offset amount is used by the first user terminal to determine a transmit power of the D2D communication according to the power offset amount, the downlink path loss estimate, and the uplink transmit power parameter.
  • the processor is further configured to: determine a transmission bandwidth of the D2D communication;
  • the transceiver is further configured to: deliver an emission bandwidth of the D2D communication;
  • the transmit bandwidth of the D2D communication is used by the first user terminal to determine an uplink transmit power according to a transmit bandwidth of the D2D communication, the downlink path loss estimate, and the uplink transmit power parameter.
  • the processor is further configured to: determine a modulation format of the D2D communication;
  • the transceiver is further configured to: deliver a modulation format of the D2D communication;
  • the modulation format of the D2D communication is used by the first user terminal to determine an uplink transmit power according to the modulation format of the D2D communication, the downlink path loss estimation, and the uplink transmit power parameter.
  • a user terminal in a third aspect, includes: a receiving unit, a determining unit, and a transmitting unit, where
  • the determining unit is configured to acquire an uplink transmit power parameter transmitted by the network device, and determine a transmit power of the D2D communication according to the downlink path loss estimate and the uplink transmit power parameter received by the receiving unit;
  • the transmitting unit is configured to transmit D2D data according to the transmit power of the D2D communication determined by the determining unit.
  • the determining unit is specifically configured to determine a transmit power of the D2D communication as follows: Determining an uplink transmit power according to the uplink transmit power parameter, a transmit bandwidth of the D2D communication, and the downlink path loss estimate, and determining a transmit power of the D2D communication according to the uplink transmit power; or
  • the determining unit is specifically configured to determine, according to the uplink transmit power, a transmit power of the D2D communication according to the following manner: determining the uplink transmit power, determining The transmit power for the D2D communication.
  • the determining unit is specifically configured to determine, according to the uplink transmit power, a transmit power of the D2D communication, as follows: determining that the uplink transmit power belongs to Power level;
  • the determining unit is specifically configured to determine, according to the manner, a power level to which the uplink transmit power belongs: determining, according to the uplink transmit power, the determining The power level to which the uplink transmit power belongs in each modulation format corresponding to the D2D communication;
  • the determining unit is specifically configured to determine, according to the manner, the transmit power of the D2D communication, according to the uplink transmit power, the modulation format of the D2D communication, and the power level of each modulation format and the transmit power of the D2D communication. Correspondence, determine the transmit power of D2D communication.
  • the determining unit is further configured to: obtain a power offset amount
  • the determining unit is specifically configured to determine, according to the uplink transmit power parameter, a transmit bandwidth of the D2D communication, a downlink path loss estimate, and the power offset amount, determine the transmit of the D2D communication. Power; or
  • the determining unit is specifically configured to determine a transmit power of the D2D communication as follows:
  • the determining unit is further configured to: determine, according to the transmit power of the D2D communication, a number of transmissions or a number of retransmissions; Specifically, the method is configured to: transmit D2D data according to the determined number of transmissions and the transmit power of the D2D communication; or transmit D2D according to the determined number of retransmissions and the transmit power of the D2D communication. data.
  • the determining unit is specifically configured to determine the number of transmissions or the number of retransmissions as follows:
  • the second correspondence is a correspondence between the transmission power of the D2D communication and the number of transmissions, or a correspondence between the transmission power of the D2D communication and the number of retransmissions relationship.
  • the transmitting unit is further configured to:
  • the transmission number information is used by the second user terminal to receive data according to the transmission times information, and the second user terminal is a terminal that performs D2D communication with the first user terminal;
  • a network device includes a determining unit and a sending unit, where
  • the determining unit is configured to determine an uplink transmit power parameter, where the uplink transmit power parameter is used by the first user terminal of the device-to-device D2D communication to determine the transmit power of the D2D communication according to the downlink path loss and the uplink transmit power parameter.
  • the determining unit is further configured to: determine a power offset amount
  • the sending unit is further configured to: send the power offset amount;
  • the power offset is used by the first user terminal to determine a transmit power of the D2D communication according to the power offset, the downlink path loss estimate, and the uplink transmit power parameter.
  • the determining unit is further configured to: determine a transmission bandwidth of the D2D communication;
  • the sending unit is further configured to: deliver an emission bandwidth of the D2D communication
  • the transmit bandwidth of the D2D communication is used by the first user terminal to determine an uplink transmit power according to a transmit bandwidth of the D2D communication, the downlink path loss estimate, and the uplink transmit power parameter.
  • the determining unit is further configured to: determine a modulation format of the D2D communication;
  • the sending unit is further configured to: deliver a modulation format of the D2D communication
  • the modulation format of the D2D communication is used by the first user terminal to determine an uplink transmit power according to the modulation format of the D2D communication, the downlink path loss estimation, and the uplink transmit power parameter.
  • a communication method including:
  • the first user terminal transmits D2D data according to the transmit power of the D2D communication.
  • the first user terminal determines, according to the uplink transmit power parameter and the downlink path loss estimate, a transmit power of the D2D communication, including:
  • the first user terminal determines an uplink transmit power according to the uplink transmit power parameter, a transmit bandwidth of the D2D communication, and the downlink path loss estimate, and determines a transmit power of the D2D communication according to the uplink transmit power; or
  • the first user terminal determines an uplink transmit power according to the uplink transmit power parameter, a transmit bandwidth of the D2D communication, a modulation format of the D2D communication, and a downlink path loss estimation, and determines a transmit power of the D2D communication according to the uplink transmit power.
  • determining, according to the uplink transmit power, a transmit power of the D2D communication including:
  • the first user terminal determines the uplink transmit power as the transmit power of the D2D communication.
  • determining, according to the uplink transmit power, a transmit power of the D2D communication including:
  • Determining, by the first user terminal, the power level to which the uplink transmit power belongs includes: determining, by the first user terminal, a modulation format of the D2D communication;
  • the first user terminal determines an uplink transmit power according to an uplink transmit power parameter, a transmit bandwidth of the D2D communication, a modulation format of the D2D communication, and a downlink path loss estimation, and determines a modulation format of the uplink transmit power corresponding to the D2D communication.
  • Determining, by the first user terminal, the transmit power of the D2D communication according to the first correspondence including: The first user terminal determines the transmit power of the D2D communication according to the correspondence between the uplink transmit power, the modulation format of the D2D communication, and the power level in each modulation format and the transmit power of the D2D communication.
  • the method further includes:
  • the first user terminal acquires a power offset amount
  • Determining, by the first user terminal, the transmit power of the D2D communication according to the uplink transmit power parameter and the downlink path loss estimate including:
  • the transmit power parameter determines the transmit power of the D2D communication.
  • the first user terminal determines, according to the uplink transmit power parameter and the downlink path loss estimate, a transmit power of the D2D communication, including:
  • the method further includes:
  • the first user terminal transmitting data according to the determined transmit power of the D2D communication, including: the first user terminal transmitting D2D data according to the determined number of transmissions and the transmit power of the D2D communication; or The first user terminal transmits D2D data according to the determined number of retransmissions and the transmit power of the D2D communication.
  • the first user terminal determines the number of transmissions or the number of retransmissions according to the transmit power of the D2D communication, and includes: the first user terminal Determining, according to the second correspondence, the number of transmissions or the number of retransmissions, where the second correspondence is a correspondence between the transmission power of the D2D communication and the number of transmissions, or a correspondence between the transmission power of the D2D communication and the number of retransmissions relationship.
  • the method further includes:
  • the first user terminal transmits retransmission times information, where the retransmission times information is used by the second user terminal to receive data according to the retransmission times information, and the second user terminal performs D2D with the first user terminal.
  • Communication terminal The first user terminal transmits retransmission times information, where the retransmission times information is used by the second user terminal to receive data according to the retransmission times information, and the second user terminal performs D2D with the first user terminal.
  • a communication method including:
  • the network device determines an uplink transmit power parameter
  • the network device sends the uplink transmit power parameter, where the uplink transmit power parameter is used by the first user terminal for device-to-device D2D communication to determine the transmit power of the D2D communication according to the downlink path loss estimate and the uplink transmit power parameter.
  • the method further includes:
  • the power offset is used by the first user terminal to determine a transmit power of the D2D communication according to the power offset, the downlink path loss estimate, and the uplink transmit power parameter.
  • the method further includes: The network device determines and delivers a transmission bandwidth of the D2D communication;
  • the transmit bandwidth of the D2D communication is used by the first user terminal to determine an uplink transmit power according to the transmit bandwidth of the D2D communication, the downlink path loss estimate, and the uplink transmit power parameter.
  • the method further includes:
  • the network device determines and delivers a modulation format of the D2D communication
  • the modulation format of the D2D communication is used by the first user terminal to determine an uplink transmit power according to the modulation format of the D2D communication, the downlink path loss estimate, and the uplink transmit power parameter.
  • the seventh aspect provides a communication system, where the communication system includes a network device and a user terminal, where the network device is a network device provided by any implementation manner of the fourth aspect, where the user terminal is implemented by any one of the third aspects.
  • User terminal provided by way.
  • the first UE of the D2D communication determines the transmit power for performing D2D communication according to the downlink path loss estimation and the received uplink transmit power parameter, that is, the first D2D communication in the prior art.
  • the UE transmits the D2D data at the maximum transmit power.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D signal of the first UE of the D2D communication experiences the received power of the network device after the fading of the channel.
  • the received power of the uplink signal of the first UE to the network device is not higher than the received power of the uplink signal of the first UE, and the received power of the D2D signal of the first UE of the D2D communication and the received power of the uplink signal of the other UE arrives at the network device. Rather, it can reduce or avoid in-band leakage interference, and will not affect the reception of uplink signals of other UEs, thereby reducing the impact of D2D communication on uplink communication.
  • Figure 1 is a schematic diagram of a communication process of a D2D communication system
  • FIG. 2 is a schematic structural diagram of a communication device according to Embodiment 1 of the present invention
  • 3 is a schematic structural diagram of a communication device according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic structural diagram of a user terminal according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a network device according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic structural diagram of a communication system according to Embodiment 5 of the present invention.
  • FIGS. 7A-7E are flowcharts of a communication method according to Embodiment 6 of the present invention.
  • Embodiment 8 of the present invention is a flowchart of a communication method according to Embodiment 8 of the present invention.
  • FIG. 10 is a flowchart of a communication method according to Embodiment 9 of the present invention. detailed description
  • the communication method and device provided by the embodiments of the present invention are applied to the D2D communication technology, and the D2D communication technology can be applied to various communication scenarios, such as LTE, 2G, or 3G.
  • a schematic diagram of the process of performing D2D communication can be referred to FIG. 1.
  • UE1 communicates with a network device, UE1 transmits communication data, and network device receives communication data.
  • the process of transmitting communication data and UE1 receiving communication data is called downlink. Communication.
  • the network device performs power control on the uplink transmit power when the UE1 performs uplink communication, and the target is that the received power of the uplink signal of the UE1 received by the network device is equivalent to the received power of the uplink signal of other UEs received by the network device.
  • the uplink transmit power referred to in the following embodiments refers to the transmit power between the UE and the network device.
  • the UE1 is a data transmitting party, and the communication between the UE and the UE performed by the UE2 and the UE3 is D2D communication, and the UE1 adjusts the transmit power of the D2D communication.
  • the UE1 adjusts the transmit power control of the D2D communication, according to the UE1 and the network.
  • the uplink transmit power when the device performs uplink communication determines the transmit power of the D2D communication, and transmits the D2D data according to the determined transmit power of the D2D communication.
  • the transmit power of the D2D communication of the UE1 is determined according to the uplink transmit power of the UE1 to the network device,
  • the received signal of the UE 2 for D2D communication and the uplink signal of other UEs are equivalent to the received power when the network device is reached, and the in-band leakage for the uplink communication of other UEs and the network device is reduced as much as possible to improve system performance.
  • the network device in the embodiment of the present invention may be an evolved base station (eNB) in an LTE system, or a base station (NB) in a Universal Mobile Telecommunications System (UMTS).
  • eNB evolved base station
  • NB base station
  • UMTS Universal Mobile Telecommunications System
  • the eNB in the LTE system is used as an example for the network device to communicate with the UE and perform resource scheduling for the UE.
  • eNB evolved base station
  • NB Universal Mobile Telecommunications System
  • the UE that transmits the D2D data in the D2D communication is referred to as the first UE, and the first UE adjusts the transmit power of the D2D communication, and the UE that receives the D2D data transmitted by the first UE in the D2D communication is called Is the second UE.
  • the first embodiment of the present invention provides a communication device 100.
  • the communication device 100 can perform the method steps of the sixth embodiment to the ninth embodiment.
  • FIG. 2 is a schematic structural diagram of a communication device according to an embodiment of the present invention. As shown in FIG. 2, the communication device includes a transceiver 11, a processor 12, a memory 13 and a bus 14, wherein the transceiver 11, the processor 12, and the memory 13 are all connected to a bus 14, wherein the memory 13 is used for storage processing. Program code executed by the device 12;
  • the processor 12 is configured to call a program stored in the memory 13, obtain an uplink transmit power parameter, and determine a transmit power of the D2D communication according to the uplink transmit power parameter and a downlink path loss estimate; and control a transmit power of the transceiver 11 according to the D2D communication. Transmitting D2D data;
  • the transceiver 11 is configured to receive an uplink transmit power parameter transmitted by the network device, and transmit the D2D data according to the transmit power of the D2D communication determined by the processor 12.
  • the uplink transmit power parameter may be received by the transceiver 11, and the processor 12 may obtain the uplink transmit power parameter from the transceiver 11. Alternatively, the processor 12 may obtain the uplink transmit power parameter from the memory 13, the memory. 13 stores the upper portion of the transceiver 11 received in advance Line transmit power parameters.
  • the processor 12 determines the transmit power of the D2D communication as follows:
  • the uplink transmit power is determined according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, and the downlink path loss estimate, and the transmit power of the D2D communication is determined according to the uplink transmit power.
  • the processor 12 is specifically configured to determine, according to the uplink transmit power, the transmit power of the D2D communication according to the following manner: using the uplink transmit power as the D2D communication Transmit power.
  • the processor 12 is specifically configured to determine, according to the uplink transmit power, the transmit power of the D2D communication according to the following manner: determining a power level to which the uplink transmit power belongs ; as well as
  • the first correspondence is stored in the memory 13, and may be pre-configured to the user terminal, or the transceiver 11 may be stored in the memory 13 after being received from the network device.
  • the correspondence mentioned in the following text is similar to this and will not be described again.
  • the processor 12 is specifically configured to determine, according to the manner, the power level to which the uplink transmit power belongs: determine a modulation format of the D2D communication, and determine an uplink. The power level to which the transmit power corresponds to the modulation format corresponding to the D2D communication;
  • the transmit power of the D2D communication is determined according to the correspondence between the uplink transmit power, the modulation format of the D2D communication, and the power level in each modulation format and the transmit power of the D2D communication.
  • the transceiver 11 is further configured to: obtain a power offset amount;
  • the processor 12 is specifically configured to determine, according to the following manner, the transmit power of the D2D communication: determining, according to an uplink transmit power parameter, a transmit bandwidth of the D2D communication, a downlink path loss estimation, and a power offset, a transmit power of the D2D communication; or
  • the transmit power of the D2D communication is determined according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimate, and the power offset.
  • the processor 12 is specifically configured to determine the transmit power of the D2D communication as follows:
  • the processor 12 is further configured to:
  • the transceiver 11 is specifically configured to transmit D2D data as follows:
  • D2D data is transmitted according to the determined number of transmissions and the transmission power of the D2D communication; or D2D data is transmitted according to the determined number of retransmissions and the transmission power of the D2D communication.
  • the processor 12 is specifically configured to determine the number of transmissions or the number of retransmissions as follows:
  • the number of transmissions or the number of retransmissions is determined according to the second correspondence, and the second correspondence is a correspondence between the transmission power of the D2D communication and the number of transmissions, or a correspondence between the transmission power of the D2D communication and the number of retransmissions.
  • the transceiver 11 is further configured to:
  • the transmission frequency information is used by the second user terminal according to the transmission frequency Receiving data
  • the second user terminal is a terminal performing D2D communication with the first user terminal; or transmitting retransmission times information, the retransmission times information is used by the second user terminal to receive data according to the retransmission times information, and the second user terminal It is a terminal that performs D2D communication with the first user terminal.
  • the transceiver 11 is configured to:
  • the transmission number information or the retransmission times information is transmitted.
  • the transmit power of the D2D communication when determining, by the communication device, the transmit power of the D2D communication, determining, according to the downlink path loss estimation and the received uplink transmit power parameter, the transmit power of performing D2D communication, that is, the first UE of the D2D communication in the prior art.
  • the D2D data is transmitted at the maximum transmit power.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D signal of the D2D communication UE undergoes the fading of the channel and the received power of the network device is not high.
  • the received power of the uplink signal of the uplink communication of the UE to the network device can ensure that the received power of the D2D signal of the D2D communication UE reaches the network device is equivalent to the received power of the uplink signal of the other UE to the network device, and can be reduced or avoided.
  • the internal leakage interference does not affect the reception of uplink signals of other UEs, thereby reducing the impact of D2D communication on uplink communication.
  • FIG. 3 is a schematic diagram of a communication device 200 according to Embodiment 2 of the present invention.
  • the communication device 200 includes a transceiver 21, a processor 22, a memory 23, and a bus 24, wherein the transceiver 21, the processor 22, and the memory 23 are all connected to the bus 24, wherein
  • a memory 23, configured to store program code executed by the processor 22;
  • the processor 22, the program stored in the memory 23 is used to determine the uplink transmit power parameter; the transceiver 21 is configured to send the uplink transmit power parameter determined by the processor 22, and the uplink transmit power parameter is used for the device-to-device D2D communication.
  • a user terminal determines a transmit power of the D2D communication according to a downlink path loss and an uplink transmit power parameter.
  • the processor 22 is further configured to: determine work Rate offset
  • the transceiver 21 is further configured to: send a power offset amount
  • the power offset is used by the first user terminal to determine the transmit power of the D2D communication according to the power offset, the downlink path loss estimate, and the uplink transmit power parameter.
  • the processor 22 is further configured to: determine a transmission bandwidth of the D2D communication;
  • the transceiver 21 is further configured to: deliver a transmit bandwidth of the D2D communication;
  • the transmit bandwidth of the D2D communication is used by the first user terminal to determine the uplink transmit power according to the transmit bandwidth, the downlink path loss estimate, and the uplink transmit power parameter of the D2D communication.
  • the processor 22 is further configured to: determine a modulation format of the D2D communication;
  • the transceiver 21 is further configured to: deliver a modulation format of the D2D communication;
  • the modulation format of the D2D communication is used by the first user terminal to determine the uplink transmit power according to the modulation format of the D2D communication, the downlink path loss estimation, and the uplink transmit power parameter.
  • the transceiver 21 uses at least one of a broadcast mode, a radio resource control protocol RRC signaling mode, and a physical layer signaling control mode.
  • the power offset is issued.
  • the communication device sends an uplink transmit power parameter, a power offset, a transmit bandwidth of the D2D communication, or a modulation format of the D2D communication, and the like, so that when the UE performing the D2D communication performs the transmit power of the D2D communication, according to the downlink
  • the path loss estimation and the received uplink transmit power parameter determine the transmit power of the D2D communication, that is, the D2D data is transmitted by the first UE of the D2D communication in the prior art at the maximum transmit power, and the transmit power of the D2D communication in the embodiment of the present invention is
  • the downlink path loss estimation is used to determine that the D2D signal of the D2D communication UE undergoes the fading of the channel and the received power of the network device is not higher than the received power of the uplink signal of the UE for uplink communication, which can be guaranteed.
  • the receiving power of the D2D signal of the D2D communication UE to the network device is equivalent to the receiving power of the uplink signal of the other UE to the network device, which can reduce or avoid the in-band leakage interference, and does not affect the receiving of the uplink signal of other UEs, thereby reducing D2D communication Impact on upstream communications.
  • the third embodiment of the present invention provides a UE 300, which is used to perform the method flow of the sixth embodiment to the eighth embodiment.
  • FIG. 4 is a schematic diagram of the structure of the UE 300 according to the embodiment of the present invention.
  • the UE 300 provided by the embodiment of the present invention includes: a receiving unit 31, a determining unit 32, and a transmitting unit 33, where
  • the determining unit 32 is configured to obtain an uplink transmit power parameter, and determine, according to the downlink path loss estimation and the uplink transmit power parameter received by the receiving unit 31, the transmit power of the D2D communication;
  • the transmitting unit 33 is configured to transmit D2D data according to the transmit power of the D2D communication determined by the determining unit 32.
  • the UE 300 provided by the embodiment of the present invention may further include a storage unit (not shown), where the storage unit may be configured to store an uplink transmit power parameter, and the determining unit 32 is configured to obtain an uplink transmit power parameter from the storage unit, where The uplink transmit power parameter stored by the storage unit is received by the receiving unit 31 from the network device.
  • a storage unit not shown
  • the storage unit may be configured to store an uplink transmit power parameter
  • the determining unit 32 is configured to obtain an uplink transmit power parameter from the storage unit, where The uplink transmit power parameter stored by the storage unit is received by the receiving unit 31 from the network device.
  • the receiving unit 31 is configured to receive an uplink transmit power parameter that is sent by the network device, and determine, by the determining unit 32, an uplink transmit power parameter.
  • the determining unit 32 is specifically configured to determine the transmit power of the D2D communication as follows:
  • the uplink transmit power is determined according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, and the downlink path loss estimate, and the transmit power of the D2D communication is determined according to the uplink transmit power.
  • the determining unit 32 is specifically configured to determine, according to the uplink transmit power, the transmit power of the D2D communication according to the following manner: the uplink transmit power is used as the D2D communication. Transmit power.
  • the determining unit 32 determining, according to the uplink transmit power, determining, according to the uplink transmit power, a transmit power of the D2D communication: determining a power level to which the uplink transmit power belongs;
  • the transmit power of the D2D communication is determined according to the first correspondence, and the first correspondence is a correspondence between the power level and the transmit power of the D2D communication.
  • the determining unit in combination with the third implementation manner of the foregoing third embodiment, in the fourth implementation manner, the determining unit
  • determining, according to the manner, a power level to which the uplink transmit power belongs determining, according to the manner, a power level to which the uplink transmit power belongs: determining a modulation format of the D2D communication, and determining a power level to which the uplink transmit power belongs in a modulation format corresponding to the D2D communication;
  • the determining unit 32 is specifically configured to determine, according to the manner, a power level to which the uplink transmit power belongs: a correspondence between an uplink transmit power, a modulation format of the D2D communication, and a power level in each modulation format and a transmit power of the D2D communication. Relationship, determining the transmit power of D2D communication.
  • the determining unit 32 is further configured to: obtain a power offset
  • the determining unit 32 is specifically configured to determine, according to the following manner, the transmit power of the D2D communication: determining, according to an uplink transmit power parameter, a transmit bandwidth of the D2D communication, a downlink path loss estimate, and a power offset, a transmit power of the D2D communication; or
  • the transmit power of the D2D communication is determined according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimate, and the power offset.
  • the power offset amount may be stored in the storage unit, and the determining unit 32 obtains the power offset amount from the storage unit.
  • the power offset amount may be received by the receiving unit 31 from the network device, and the determining unit is The power offset amount is obtained from the receiving unit 31.
  • the determining unit 32 is specifically configured to determine the transmit power of the D2D communication as follows:
  • the uplink transmit power parameter According to the uplink transmit power parameter, according to the uplink transmit power parameter and the D2D transmit function
  • the transmit bandwidth, the modulation format of the D2D communication, and the downlink path loss estimate determine the transmit power of the D2D communication.
  • the corresponding relationship may be pre-configured into the storage unit, and the determining unit obtains the corresponding relationship from the storage unit, or the corresponding relationship may be received by the receiving unit from the network device, and the determining unit is received from the receiving unit. Get the corresponding relationship.
  • Other correspondences in this embodiment may also be similar to this, and are not described herein again.
  • the determining unit 32 is further configured to: determine, according to the transmit power of the D2D communication, the number of transmissions or the number of retransmissions; the transmitting unit 33, specifically The D2D data is transmitted as follows: D2D data is transmitted according to the determined number of transmissions and the transmission power of the D2D communication; or D2D data is transmitted according to the determined number of retransmissions and the transmission power of the D2D communication.
  • the number of transmissions or the number of retransmissions is determined according to the second correspondence, and the second correspondence is a correspondence between the transmission power of the D2D communication and the number of transmissions, or a correspondence between the transmission power of the D2D communication and the number of retransmissions.
  • the transmitting unit 33 is further configured to:
  • the transmission times information is used by the second UE to receive data according to the transmission times information, and the second UE is a terminal that performs D2D communication with the first UE; or
  • the retransmission times information is used by the second UE to receive data according to the retransmission times information, and the second UE is a terminal that performs D2D communication with the first UE.
  • the transmitting unit In combination with the ninth implementation manner of the foregoing third embodiment, in the tenth implementation manner, the transmitting unit
  • the information about the transmission times or the number of retransmissions is transmitted as follows:
  • the transmission number information or the retransmission times information is transmitted.
  • the UE provided in the embodiment of the present invention determines the transmit power of performing D2D communication according to the downlink path loss estimation and the received uplink transmit power parameter when determining the transmit power of the D2D communication, that is, compared to the D2D communication in the prior art.
  • the UE transmits the D2D data at the maximum transmit power.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D signal of the D2D communication UE experiences the received power of the network device after the channel fading.
  • the received power of the uplink signal of the uplink communication of the UE to the network device can ensure that the received power of the D2D signal of the UE of the D2D communication arrives at the network device is equal to the received power of the uplink signal of the other UE, and can be reduced or avoided.
  • In-band leakage interference does not affect the reception of uplink signals of other UEs, thereby reducing the impact of D2D communication on uplink communication.
  • the fourth embodiment of the present invention provides a network device 400, which is used to perform the method flow of the following ninth embodiment, and FIG. 5 is a schematic structural diagram of the network device 400 according to the fourth embodiment of the present invention.
  • the network device 400 includes a determining unit 41 and a sending unit 42, where
  • a determining unit 41 configured to determine an uplink transmit power parameter
  • the sending unit 42 is configured to send the uplink transmit power parameter determined by the determining unit 41, and the uplink transmit power parameter is used by the first UE for device-to-device D2D communication to determine the transmit power of the D2D communication according to the downlink path loss and the uplink transmit power parameter.
  • the determining unit 41 is further configured to: determine a power offset
  • the sending unit 42 is further configured to: send a power offset amount
  • the power offset is used by the first UE to determine the transmit power of the D2D communication according to the power offset, the downlink path loss estimate, and the uplink transmit power parameter.
  • the determining unit 41 is further configured to: determine a transmission bandwidth of the D2D communication;
  • the sending unit 42 is further configured to: deliver a transmission bandwidth of the D2D communication;
  • the transmission bandwidth of the D2D communication is used for the first UE according to the transmission bandwidth of the D2D communication
  • the path loss estimate and the uplink transmit power parameter determine the uplink transmit power
  • the sending unit 42 may issue only one or both of the power offset amount and the transmission bandwidth of the D2D communication. If the sending unit 42 only delivers the transmission bandwidth of the D2D communication, the first UE determines the uplink transmit power according to the transmit bandwidth, the downlink path loss estimate, and the uplink transmit power parameter of the D2D communication, does not use the power offset, or uses the pre-configured The power offset can be implemented. If the sending unit 42 only sends the power offset, the first UE determines whether the uplink transmit power can use the transmit bandwidth of the pre-configured D2D communication, or uses other pre-configured bandwidth values. .
  • the determining unit 41 is further configured to: determine a modulation format of the D2D communication;
  • the sending unit 42 is further configured to: deliver a modulation format of the D2D communication
  • the modulation format of the D2D communication is used by the first UE to determine the uplink transmit power according to the modulation format of the D2D communication, the downlink path loss estimation, and the uplink transmit power parameter.
  • the sending unit 42 is specifically configured to send the power offset amount as follows: ⁇ broadcast mode, radio resource control protocol RRC letter
  • the power offset is sent in at least one of a mode and a physical layer signaling control mode.
  • the transmission bandwidth of the communication or the modulation format of the D2D communication is performed, so that when the UE performing D2D communication performs the transmission power determination of the D2D communication, the transmission power of the D2D communication is determined according to the downlink path loss estimation and the received uplink transmission power parameter. That is, the D2D communication is transmitted with the maximum transmit power of the UE in the D2D communication in the prior art.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D signal of the D2D communication UE experiences the channel fading.
  • the received power of the network device that arrives at the network is not higher than the received power of the uplink signal of the UE for uplink communication, and the received power of the D2D signal of the D2D communication UE and the uplink signal of the other UE arrive at the network device.
  • the receiving power is equivalent, which can reduce or avoid in-band leakage interference, and will not affect the reception of uplink signals of other UEs, thereby reducing the uplink of D2D communication. The impact of communication.
  • the fifth embodiment of the present invention provides a communication system 500.
  • the communication system 500 includes the UE 300 and the network device 400 according to the fourth embodiment.
  • FIG. 6 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • the UE and the network device included in the communication system provided by the embodiment of the present invention have all the functions involved in the foregoing embodiments. For details, refer to the related description of the foregoing embodiments, and details are not described herein again.
  • the UE when determining the transmit power of the D2D communication, determines the transmit power of the D2D communication according to the downlink path loss estimation and the received uplink transmit power parameter, that is, the D2D communication in the prior art.
  • the UE transmits the D2D data with the maximum transmit power.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D signal of the D2D communication UE experiences the channel power and the received power of the network device does not arrive.
  • the received power of the uplink signal of the UE for uplink communication reaches the network device, and the received power of the D2D signal of the UE for D2D communication to the network device is equal to the received power of the uplink signal of the other UE to the network device. It can reduce or avoid in-band leakage interference, and will not affect the reception of uplink signals of other UEs, thereby reducing the influence of D2D communication on uplink communication.
  • FIG. 7A is a flowchart of the implementation of the communication method according to the embodiment of the present invention.
  • the execution entity of the communication method shown in FIG. 7A is an example of the first UE. As shown in FIG. 7A, the method includes:
  • the first UE acquires an uplink transmit power parameter.
  • the first UE determines a transmit power of the D2D communication according to the downlink path loss estimation and the received uplink transmit power parameter.
  • the first UE transmits D2D data according to the transmit power of the D2D communication determined in S102.
  • the first UE For the first UE to obtain the uplink transmit power parameter, refer to the foregoing description, which is not described in this embodiment.
  • the first UE may perform D2D communication between the first UE and the second UE, or uplink communication between the first UE and the network device, to determine the transmit power of the corresponding link.
  • the uplink transmit power parameter may be delivered by the network device.
  • the D2D communication of the UE may have a maximum transmission power limit, and the transmission power p of the D2D communication does not exceed the maximum transmission power.
  • the maximum transmission power of the D2D communication is 15 " ⁇ may be predefined or sent by the network side when the UE is degraded according to the downlink path.
  • the estimated transmit power p of the D2D communication determined by the uplink transmit power parameter is greater than the maximum transmit power of the D2D communication 15 " ⁇ , the UE selects the maximum transmit power of the D2D communication» as the transmit power of the final D2D communication.
  • the received power of the D2D communication signal of the UE to the network device is smaller than the received power of the uplink signal of the other UE to the network device, and the D2D communication signal of the UE does not affect the uplink communication.
  • the maximum transmit power of the D2D communication with a smaller value is selected to avoid
  • the in-band leakage of other UE uplink signals further reduces the impact on the uplink communication, and the D2D data transmission is performed by using the maximum transmission power of the D2D communication, which can ensure the normal operation of the D2D communication and save the UE's transmission power.
  • the network device may be delivered in a unicast manner, for example, by using RRC (radio resource control) signaling or physical layer signaling, or by using a combination of broadcast and unicast. .
  • the following manner when determining the transmit power of the D2D communication according to the downlink path loss estimation and the uplink transmit power parameter, the following manner may be preferred:
  • First way S102a The first UE determines an uplink transmit power according to an uplink transmit power parameter, a transmit bandwidth of the D2D communication, and a downlink path loss estimate, and determines a transmit power of the D2D communication according to the uplink transmit power.
  • the first UE determines the uplink transmit power according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, and the downlink path loss estimate.
  • the uplink transmit power is any method for setting the uplink transmit power by the slow open loop power control and the fast closed loop power control. For example, for the serving cell c, only the physical uplink shared channel is in the subframe i ( When the uplink data of the Physical Uplink Shared Channel, PUSCH is transmitted, the uplink transmit power determining mechanism can refer to formula (1):
  • -p ⁇ 3 ⁇ 4 /') and O) are configuration parameters for the upper layer;
  • ') is the transmission bandwidth of the uplink communication, and is the downlink path loss estimate between the UE and the network device of the serving cell c;
  • fc (' ⁇ ) fc (' ⁇ - ⁇ ) + ⁇ PUSCHp (' ⁇ - PUSCH) or
  • fc (' ⁇ ) ⁇ PUSCH,c (' ⁇ - PUSCH)
  • ⁇ PUSCHp is the power adjustment value, which is a sub-frame offset;
  • K s Q , BPRE and P t are parameters required for both control signaling and data to be transmitted on the PUSCH.
  • the power adjustment value ⁇ USCHP refers to the dynamic inclusion of the physical downlink control channel.
  • DCI Downlink Control Information
  • PDCCH Physical Downlink Control Channel
  • PDCCH enhanced physical downlink control channel
  • TPC Transmission Power Control
  • ⁇ USCHP can select the cumulative value according to the high-level setting parameter Accumulation-enabled (accumulated value activation parameter) (accumulate power based on the previous sub-frame ⁇ ('XG - D + ⁇ PUSCH ⁇ ' - ⁇ PUSCH)) Or absolute value
  • the uplink transmit power parameter includes the high layer configuration parameter P. PUSC . /), and deltaMCS-Enable, and physical layer configuration parameters. P. PUSC . /), a c (j) .
  • the deltaMCS-Enable and the network device are set according to the actual communication situation and transmitted by the network device to the UE.
  • the transmission bandwidth of the D2D communication ⁇ " ⁇ ') is pre-defined or scheduled from the eNB, and the downlink path loss is estimated by the UE.
  • the transmission bandwidth used for determining the uplink transmission power is the transmission bandwidth of the D2D communication, and Instead of using the transmission bandwidth Mpus ⁇ ( ) of the uplink communication in the above formula, the calculated uplink transmission power can ensure that the received power of the actually transmitted D2D signal arriving at the network device is not higher than the uplink of the first UE for uplink communication.
  • the received power of the signal to the network device can ensure that the received power of the D2D signal of the first UE arrives at the network device and the received signal of the uplink signal of the other UE arrives at the network device.
  • the rate is equivalent, which can reduce or avoid in-band leakage interference, and will not affect the reception of uplink signals of other UEs.
  • is a downlink path loss estimation obtained by the UE through measurement, which is also different from the path loss estimation of the D2D communication when determining the transmit power of the D2D communication in the prior art, thereby reducing the D2D communication pair.
  • the used transmit bandwidth p usc 3 ⁇ 4 c (for pre-defined or from the eNB)
  • the transmission bandwidth of the D2D communication obtained by scheduling is different from the current
  • the UE estimates the downlink path loss obtained by the measurement.
  • the first UE of the D2D communication is calculated based on the transmission bandwidth and downlink path loss estimation of the D2D communication when calculating the uplink transmission power.
  • the purpose of the present invention is to reduce the impact of D2D communication on uplink communication, when the transmit power of the D2D communication determined by the first UE according to the downlink path loss estimation and the uplink transmit power parameter is greater than the transmit power of the D2D communication. Selecting the maximum transmit power of D2D communication with smaller value, avoiding in-band leakage of other UE uplink signals, further reducing the impact, and transmitting the D2D data with the maximum transmit power of D2D communication, which can ensure the normal D2D communication. Perform, save the UE's transmit power.
  • the determined uplink transmit power may be directly used as the transmit power of the D2D communication, and the uplink transmit power may be quantized to determine the transmit power of the D2D communication.
  • the uplink transmit power is preferably quantized.
  • the uplink transmit power is quantized and the transmit power of the D2D communication is determined as follows:
  • the transmit power of the D2D communication may be determined according to the correspondence between the power level and the transmit power of the D2D communication.
  • the correspondence between the power level and the transmission power of the D2D communication is referred to as a first correspondence.
  • the first correspondence relationship may be preset, and the preset first correspondence relationship may be as shown in Table 3.
  • P mm , P l is the separation point (or called quantization point) of the system's predefined power level.
  • P mm > 0, P max can be equal to the rated transmit power of the UE.
  • the specific value can be Configured or pre-defined by the network device.
  • the separation point can be set based on the empirical value.
  • the first UE calculates the uplink transmit power as P according to the uplink transmit power parameter and the uplink transmit power determining mechanism. After determining the uplink transmit power p, the power level to which the uplink transmit power p belongs may be determined. Within a certain level, D2D communication uses a uniform transmit power.
  • the uplink transmit power P when the uplink transmit power P is satisfied Then, it can be determined that the transmit power of the D2D communication is P N , and the UE transmits the D2D data according to the transmit power.
  • the transmit power of the D2D communication of the first UE is equivalent to the uplink transmit power of the first UE, and the received power of the D2D signal of the first UE and the uplink signal of the other UE may be ensured to reach the network device.
  • the received power is equivalent, which can reduce or avoid in-band leakage interference.
  • the value of the transmit power of the D2D communication of the first UE can be further limited, and the coverage of the D2D signal of the first UE is limited, thereby facilitating subsequent compensation of the coverage.
  • the power level division may be divided according to actual conditions, for example, a plurality of power levels may be divided, so that the D2D communication power adjustment is finer, or a smaller number of power levels may be divided, for example, The two levels are divided so that the transmission power of the D2D communication is less, which facilitates the reception processing of the second UE of the D2D communication.
  • the first UE that performs the D2D communication may be transmitted according to a smaller power, where the minimum power is the maximum power that does not affect the system; or the UE is in the UE that is sent by the network device.
  • the transmission power is adjusted in the case where the upper limit of the maximum transmission power of the D2D communication is performed. Further, the size of the transmit power may also be related to the modulation format. When the D2D transmission of the same UE uses different modulation formats, the transmit power may also be different, so when the modulation format of the first UE of the D2D communication is variable, A UE may determine the transmit power of the D2D communication according to a modulation format of the D2D communication used by the first UE.
  • the first UE may determine the uplink transmit power according to the uplink transmit power parameter of the first UE, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, and the downlink path loss estimation according to the uplink transmit power determining mechanism. And determining the transmit power of the D2D communication according to the determined uplink transmit power.
  • the determined uplink transmit power may be directly used as the transmit power of the D2D communication, and the uplink transmit power may be quantized to determine the transmit power of the D2D communication.
  • Table 4 The correspondence between the power level under and the transmit power of D2D communication is shown in Table 4:
  • the first UE performing D2D communication needs to adopt the uplink transmit power parameter delivered by the network device, the transmit bandwidth of the D2D communication, and the modulation of the D2D communication.
  • the format and downlink path loss estimation determine the uplink transmit power according to the uplink transmit power determining mechanism, and the power level to which the uplink transmit power belongs in the modulation format of the corresponding D2D communication.
  • the first UE may determine the uplink transmit power according to the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimation, and the uplink transmit power parameter transmitted by the network device.
  • the first UE may determine whether the transmit power is related to the modulation format according to the deltaMCS-Enabled transmitted by the network device.
  • the deltaMCS-Enabled When the deltaMCS-Enabled is not activated, indicating that the transmit power is independent of the modulation format, when determining the uplink transmit power, When the deltaMCS-Enabled is activated, it indicates that the transmit power is related to the modulation format.
  • the first UE performs the uplink transmit power determination, it can combine the uplink transmit power parameter, the transmit bandwidth of the D2D communication, and the modulation format of the D2D communication.
  • the determined uplink transmit power is p Q psK
  • the P Q PSK satisfies ⁇ * - QPSK ⁇ QPSK ⁇ P i-QPSK , according to the power level in each modulation format shown in Table 4, and the correspondence between the power level in each modulation format and the transmission power of D2D communication, it can be seen that P mm-QPSK ⁇ PQPSK ⁇ P 1 -
  • the transmit power of the corresponding D2D communication in the QPSK class is Pm - QPSK
  • the transmit power of the D2D communication is determined to be Pm - Q psK
  • the first U E transmits D2D data according to the transmission power Pm - Q psK .
  • Different modulation formats correspond to different uplink transmit powers, because when the modulation formats are different, the uplink transmit powers are also used with different quantized values, which are adapted to the respective modulation formats.
  • the method for determining the transmit power of the D2D communication in the foregoing embodiment of the present invention is such that when the value of the transmit power of the D2D communication is within a certain range in a certain modulation format, the transmit power of the D2D communication of the first UE is made as high as possible.
  • the uplink transmit power of the uplink communication of the UE is equivalent, and the received power of the D2D signal of the first UE and the received signal of the uplink signal of the other UE may be ensured.
  • the rate is equivalent, reducing or avoiding in-band leakage interference, which can ensure that the impact of D2D communication on network uplink communication is minimized.
  • By quantizing the transmit power by further limiting the value of the transmit power of the D2D communication of the UE, the coverage of the D2D signal of the UE is limited, which facilitates subsequent compensation coverage.
  • the uplink power determination mechanism and parameters are partially used, and the power control parameters are not added for the D2D communication, and multiple sets of parameters are not notified (uplink transmission)
  • the complexity of the power parameters and the D2D transmit power parameters saves the power control signaling overhead of separately notifying D2D communication.
  • the first UE acquires a power offset quantity and receives an uplink transmit power parameter that is sent by the network device, where the first UE is configured according to an uplink transmit power parameter, a transmit bandwidth of the D2D communication, a downlink path loss estimate, and a obtained power offset. Quantity, determine the transmit power of D2D communication.
  • the network device may transmit the power offset and the uplink transmit power parameter to the UE in a broadcast or multicast manner, where the power offset transmitted by the network device is the uplink of the transmit power of the D2D communication.
  • a power offset of the transmit power can be used to notify high-level configuration parameters, or physical layer configuration parameters, or a combination of high-level configuration parameters and physical layer configuration parameters.
  • the high-level configuration parameter notifies a first offset
  • the physical layer configuration parameter notifies the second offset
  • the first UE obtains the power offset by using the first offset and the second offset; or The way of an offset or a second offset.
  • the amount of power offset in the embodiments of the present invention may also be predefined.
  • the power offset amount can be assumed to be ⁇ in the embodiment of the present invention, wherein ⁇ can be a positive number, a negative number or zero.
  • the first UE may determine the uplink transmit power according to the uplink transmit power parameter transmitted by the network device. For the specific determination process, refer to the process of determining the uplink transmit power involved in the first mode, which is not described herein again.
  • the transmit power of the D2D communication may be expressed as ⁇ + ⁇ , and the process of determining the transmit power of the D2D communication is relatively simple.
  • the embodiment of the present invention may also define a relatively complex nonlinear formula to determine the transmit power of the D2D communication.
  • the high-level configuration parameter of the uplink transmit power parameter in the embodiment of the present invention When the deltaMCS-Enabled is activated, the first UE determines the transmit power of the D2D communication according to the uplink transmit power parameter transmitted by the network device, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimation, and the acquired power offset.
  • the first UE of the D2D communication determines the transmit power of the D2D communication according to the downlink path loss estimation and the received uplink transmit power parameter, that is, relative to the prior art.
  • the first UE of the D2D communication transmits the D2D data at the maximum transmit power.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D communication signal of the first UE of the D2D communication experiences the channel fading
  • the received power of the network device is not higher than the received power of the uplink signal of the first UE to the network device, and the D2D communication signal of the first UE of the D2D communication can reach the receiving power of the network device and the uplink of other UEs.
  • the received power of the signal arriving at the network device is equivalent, which can reduce or avoid in-band leakage interference, and does not affect the reception of uplink signals of other UEs, thereby reducing the influence of D2D communication on uplink communication.
  • the first UE determines the D2D transmit power parameter according to the preset correspondence relationship according to the uplink transmit power parameter transmitted by the network device, and determines the transmit of the D2D communication according to the determined D2D transmit power parameter, the transmit bandwidth of the D2D communication, and the downlink path loss estimate. power.
  • the first UE may perform the D2D communication according to the actual situation, or the traditional communication with the network device, and may use different interpretation modes for the uplink transmit power parameters sent by the network device, so the implementation of the present invention
  • the uplink transmit power parameter transmitted by the network device can be interpreted as the D2D transmit power parameter required for the D2D communication, and then the D2D communication is calculated according to the algorithm of the uplink transmit power. Transmit power.
  • the embodiment of the present invention is described by taking the example of the TPC as an example.
  • the USCH is shown in Table 1 and Table 2 after the TPC is interpreted.
  • the same TPC can be based on the preset correspondence. Whether uplink communication or D2D communication is interpreted as a different value, the preset correspondence relationship refers to specifically deciphering TPC as which USCH in D2D communication is pre-set, for example
  • Table 5 and Table 6 in the embodiment of the present invention add the D2D cumulative value ⁇ USCH ⁇ and the D2D absolute value ⁇ USCH ⁇ columns on the basis of Table 1 and Table 2, that is, Table 5 in the embodiment of the present invention.
  • Table 6 shows the values or states of the same TPC, which are interpreted as different USCH and C values for uplink communication and D2D communication, respectively.
  • the TPC is taken as an example for description.
  • other uplink transmit power parameters such as ⁇ -PUSCH ⁇ W
  • a person can use the same parameters as the uplink communication, but the same parameters, for uplink communication and D2D communication
  • the specific value for interpreting the uplink transmit power parameter as the D2D transmit power parameter may be preset.
  • the first UE determines the D2D transmit power parameter according to the preset correspondence relationship according to the uplink transmit power parameter transmitted by the network device, and According to the determined D2D transmit power The number, the transmission bandwidth of the D2D communication, the modulation format of the D2D communication, and the downlink path loss estimation, calculate the transmission power of the D2D communication according to the uplink transmission power determination mechanism.
  • the rate determining mechanism after calculating the transmit power of the D2D communication, can also quantize the received transmit power of the D2D communication, that is, determine the power level to which the transmit power of the D2D communication belongs, and within a certain level, the D2D communication uses a unified
  • the D2D communication uses a unified
  • different interpretation modes of the uplink transmit power parameters may be used, and it is not necessary to additionally add power control parameters for D2D communication, and no additional power control signaling overhead is added, thereby avoiding notifying multiple sets of parameters (uplink transmit power parameters and The complexity of the D2D transmit power parameter) saves the power control signaling overhead of separately notifying D2D communication.
  • the uplink reflection power may be determined by using any one of the foregoing three manners, and the specific implementation process of the first UE for performing D2D communication may be as shown in FIG. 7B and FIG. 7C.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined according to the uplink transmit power parameter and the downlink path loss estimate, so that the transmit power of the D2D communication of the first UE may be uplink communication between the network device and the first UE.
  • the uplink power determining mechanism determines the transmission bandwidth used for determining the uplink transmit power to be the transmit bandwidth of the D2D communication, and P is the downlink path loss estimate obtained by the first UE by measurement, so the first UE participating in the different D2D communication
  • the transmit power of the D2D communication may be different (determined by the link state of the first UE and the network device, such as the distance between the network device and the first UE of the D2D communication), so the coverage of multiple first UEs performing D2D communication
  • the range is different according to the transmission power of the D2D communication.
  • the coverage of the first UE performing different D2D communication is the same, and the D2D communication can be determined in the first UE of the D2D communication.
  • the number of transmissions or the number of retransmissions is determined, that is, the number of transmissions of D2D data that can increase the low transmission power in the embodiment of the present invention.
  • the first UE receiving a uniform performance ensure the normal communication D2D D2D communication each number of retransmissions, increasing opportunities for D2D data transmission in the time domain, such that the transmit power of different D2D communication.
  • the first UE determines the transmit power of the D2D communication according to the uplink transmit power, and the process of determining the number of retransmissions is as shown in FIG. 7D, and includes:
  • the first UE determines a transmit power of the D2D communication according to the uplink transmit power parameter and the downlink path loss estimate.
  • S202 Determine the number of transmissions or the number of retransmissions according to the transmit power of the D2D communication.
  • the correspondence between the transmit power and the number of retransmissions of the D2D communication may be preset, or the corresponding relationship between the transmit power of the D2D communication and the number of retransmissions is preset, and the transmit power and weight of the D2D communication in the embodiment of the present invention are
  • the correspondence relationship of the number of transmissions, or the correspondence between the transmission power of the D2D communication and the number of retransmissions is referred to as a second correspondence.
  • the first UE determines the number of transmissions or the number of retransmissions according to the transmission power of the D2D communication
  • the number of transmissions or the number of retransmissions may be determined according to the second correspondence.
  • the second correspondence relationship may be preset, and when the transmit power is independent of the modulation format, the second correspondence relationship as shown in Table 7 may be set, and when the transmit power is related to the modulation format, the second correspondence may be set.
  • Table 8 the specific correspondence can be as shown in Table 7 and Table 8:
  • the uplink transmit power, the transmit power and the number of transmissions of the D2D communication shown in Table 9 or Table 10 can be combined with Table 3 and Table 7, Table 4 and Table 8. Correspondence between the uplink transmission power, the transmit power of D2D communication, and the number of retransmissions:
  • the correspondence between the uplink transmit power, the transmit power of the D2D communication, and the number of transmissions as shown in Table 11 may be preset, or preset.
  • the first UE performing D2D communication uses the same transmit power of the D2D communication, and performs D2D data transmission according to the preset second correspondence. If the uplink transmit power is classified, the first UE uses different transmit powers of the D2D communication, and then the transmit power of the D2D communication can be determined according to the correspondence in Table 7 or Table 8.
  • the number of transmissions or the number of retransmissions may be determined according to the correspondence in Table 7
  • the process of determining the transmit power of the D2D communication is based on
  • the number of transmissions or the number of retransmissions may be determined according to the correspondence in Table 8.
  • S203 The D2D data is transmitted according to the number of transmissions or the number of retransmissions determined by S202, and the transmission power of the D2D communication.
  • the number of transmissions or the number of retransmissions of D2D data with low transmission power can be increased, and the transmission opportunity of D2D data is increased in the time domain, so that the first UE has a uniform reception performance index.
  • the second UE when the first UE transmits D2D data according to the determined number of transmissions and the transmit power of the D2D communication, or when the D2D data is transmitted according to the determined number of retransmissions and the transmit power of the D2D communication, the second UE is used to enable the second UE.
  • the first UE can transmit the transmission times information or the retransmission times information in the embodiment of the present invention.
  • the specific implementation process is shown in FIG. 7E, and FIG. 7E is based on FIG. 7D. Also includes:
  • the scheduling assignment indicates, by the first UE of the D2D communication, the information of the second UE of the D2D communication for the information of the subsequent D2D data, etc.
  • the first UE may carry the transmission times information or the retransmission times information in the SA, and implement the transmission of the transmission times information or the retransmission times information.
  • S204 may be performed after S203, or may be performed before S203, which is not limited by the embodiment of the present invention.
  • the transmit power of the D2D communication used by the first UE that performs the D2D communication may be different, which may cause different coverage of the first UE, and thus the receiving performance of the data transmitted by the first UE may be different, such as D2D communication.
  • the first UE with high transmit power may cover a larger range, that is, may be correctly received by the second UE with more potential D2D communication, while the first UE with low transmit power of D2D communication covers a relatively small range, that is, The second UE that is caused by relatively little potential D2D communication is correctly received, and the target of the D2D communication is usually that the first UE of the D2D communication has the same coverage.
  • the number of transmissions or retransmissions of data transmission by the first UE with low transmission power may be increased, and transmission opportunities may be increased in the time domain, so that sufficient energy is accumulated after multiple transmissions.
  • the transmission power is different, the same reception performance can be achieved.
  • FIG. 8 is a flowchart of a communication method according to an embodiment of the present invention.
  • the execution body of the communication method shown in FIG. 8 is an example of the first UE. As shown in FIG. 8, the method includes:
  • the first UE performing D2D communication determines the transmission times information or the retransmission times information of the D2D communication.
  • the first UE performing the D2D communication transmits the D2D data according to the transmission times information or the retransmission times information determined by S301, and transmits the transmission times information or the retransmission times information determined by S301.
  • the first UE of the D2D communication determines the transmission times information or the retransmission times information of the D2D communication, and transmits the D2D data according to the determined transmission times information or the retransmission times information, so that the D2D communication can be normally performed.
  • the first UE performing D2D communication in the embodiment of the present invention may be sent according to D2D communication.
  • the shot power determines the number of transmission times or the number of retransmissions information, and then transmits the D2D data according to the determined number of transmissions or the number of retransmissions, and the transmission power of the D2D communication.
  • the first UE performing D2D communication needs to determine the transmit power of the D2D communication before performing S301.
  • the present invention The first UE performing D2D communication in the embodiment may determine the transmit power of the D2D communication according to the uplink transmit power parameter.
  • the first UE performing D2D communication in the embodiment of the present invention may determine the transmit power of the D2D communication according to the uplink transmit power parameter, and may determine the transmit power of the D2D communication by using the first UE of the D2D communication in the sixth embodiment, for example, :
  • the first UE determines the uplink transmit power according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, and the downlink path loss estimate, and determines the transmit power of the D2D communication according to the uplink transmit power; or the first UE according to the uplink transmit power parameter, D2D
  • the transmission bandwidth of the communication, the modulation format of the D2D communication, and the downlink path loss estimation determine the uplink transmission power, and determine the transmission power of the D2D communication according to the uplink transmission power.
  • the row transmit power is quantized to determine the power level to which the uplink transmit power belongs, and the transmit power of the D2D communication is determined according to the correspondence between the preset power level and the transmit power of the D2D communication.
  • the first UE determines the transmit power of the D2D communication according to the uplink transmit power parameter transmitted by the network device, the transmit bandwidth of the D2D communication, the downlink path loss estimate, and the power offset amount transmitted by the network device; or the first UE transmits according to the network device.
  • the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, the downlink path loss estimate, and the power offset amount transmitted by the network device determine the transmit power of the D2D communication.
  • the first UE determines the D2D transmit power parameter according to the preset corresponding relationship according to the uplink transmit power parameter transmitted by the network device, and determines according to the determined D2D transmit power parameter, the transmit bandwidth of the D2D communication, and the downlink path loss, according to the uplink transmit power.
  • the mechanism calculates the transmit power of the D2D communication; or the first UE determines the D2D transmit power parameter according to the preset correspondence according to the uplink transmit power parameter transmitted by the network device, and according to the determined D2D transmit power parameter, D2D
  • the transmission bandwidth of the communication, the modulation format of the D2D communication, and the downlink path loss estimation, the transmission power of the D2D communication is calculated according to the uplink transmission power determination mechanism.
  • the correspondence between the transmit power, the number of transmissions, and the number of retransmissions of the D2D communication may be preset. After determining the transmit power of the D2D communication, the transmit power and transmission according to the preset D2D communication may be transmitted. For the correspondence between the number of times and the number of retransmissions, the number of transmissions or the number of retransmissions is determined. For the correspondence between the transmission power, the number of transmissions, and the number of retransmissions of the D2D communication, refer to the related description in Embodiment 6, and details are not described herein again.
  • the size of the transmit power may also be related to the modulation format.
  • the transmit power may also be different, so when the modulation format of the first UE of the D2D communication is variable, Then, the first UE may perform the determination of the transmit power of the D2D communication according to the modulation format used by the D2D communication.
  • the first UE may determine the uplink transmit power according to the high-level configuration parameter deltaMCS-Enabled, the uplink transmit power parameter, and the modulation format of the D2D communication, and determine each modulation to which the uplink transmit power belongs according to the uplink transmit power.
  • the power level in the format so that the first UE of the D2D communication can determine the D2D according to the correspondence between the uplink transmit power, the modulation format of the D2D communication, and the preset power level of each modulation format and the transmit power of the D2D communication.
  • the transmission power of the communication, the power level in each modulation format defined in the embodiment of the present invention, and the correspondence between the power level in each modulation format and the transmission power of the D2D communication may be further referred to in the sixth embodiment. Description, no longer repeat here.
  • the first UE may carry the transmission times information or the retransmission times information in the scheduling assignment (SA), and implement the transmission of the transmission times information or the retransmission times information.
  • SA scheduling assignment
  • the method for performing the D2D communication of the first UE involved in the seventh embodiment of the present invention is similar to the method for performing the communication in the sixth embodiment.
  • the details are not described in detail in the sixth embodiment. Related descriptions are not described here.
  • the first UE determines the transmission times information of the D2D communication or The retransmission number information transmits D2D data according to the determined transmission number information or the retransmission number information, thereby ensuring normal D2D communication.
  • the first UE determines, according to the downlink path loss estimation and the received uplink transmit power parameter, the transmit power for performing D2D communication, that is, the D2D data is transmitted by the first UE of the D2D communication in the prior art at the maximum transmit power, and the present invention
  • the transmit power of the D2D communication is determined by using the downlink path loss estimation, so that the D2D communication signal of the first UE of the D2D communication undergoes the fading of the channel and the received power of the network device is not higher than the first UE.
  • the received uplink power of the communication arrives at the received power of the network device, which can ensure that the received power of the D2D communication signal of the first UE of the D2D communication arrives at the network device is equivalent to the received power of the uplink signal of the other UE to the network device, which can reduce or avoid the in-band leakage. Interference does not affect the reception of uplink signals of other UEs, which in turn can reduce the impact of D2D communication on uplink communication.
  • FIG. 9 is a flowchart of a communication method according to an embodiment of the present invention.
  • the execution entity of the communication method shown in FIG. 9 is a second UE.
  • the method includes:
  • the second UE performing D2D communication acquires the transmission times information or the retransmission times information of the D2D communication.
  • the second UE performing D2D communication receives data according to the obtained transmission frequency information or retransmission times information.
  • the second UE performing the D2D communication in the embodiment of the present invention may be based on the acquired transmission.
  • the number of times information or the number of retransmissions information is received to ensure accurate reception of data.
  • the second UE may obtain a scheduling signaling (SA) notification, and obtain the number of transmissions from the SA notification.
  • SA scheduling signaling
  • the second UE may receive data according to the obtained transmission times information or retransmission times information, so as to ensure accurate reception of data, and can ensure D2D communication. Work properly.
  • FIG. 10 is a flowchart of the implementation of the communication method according to the embodiment of the present invention.
  • the execution body of the communication method shown in FIG. 10 is an example of a network device. As shown in FIG. 10, the method includes:
  • the network device determines an uplink transmit power parameter.
  • the network device sends the determined uplink transmit power parameter, so that the first UE determines the transmit power of the D2D communication according to the uplink transmit power parameter.
  • the network device may send different uplink transmit power parameters according to the manner in which the first UE determines the transmit power of the D2D communication, for example, the network device may send the relevant uplink transmit power parameter, so that the first UE may According to the uplink transmit power parameter, the transmit bandwidth and the downlink path loss estimation of the D2D communication, or the uplink transmit power according to the uplink transmit power parameter, the transmit bandwidth of the D2D communication, the modulation format of the D2D communication, and the downlink path loss estimate, and according to the determined uplink
  • the transmit power determines the transmit power of the D2D communication; the first UE may also determine the D2D transmit power parameter according to the preset corresponding relationship according to the uplink transmit power parameter transmitted by the network device, and interpret the same uplink transmit power parameter used by the uplink communication.
  • the network device may also send an uplink transmit power parameter and a power offset, so that the first UE determines the uplink transmit power according to the uplink transmit power parameter, and then determines the transmit power of the D2D communication according to the power offset.
  • the transmission bandwidth of the D2D communication is the transmission bandwidth of the D2D communication used by the first UE for determining the uplink transmission power.
  • the modulation format of the D2D communication is a modulation format of the D2D communication used by the first UE for determining the uplink transmission power.
  • the network device may send the uplink transmit power parameter, the power offset, and the D2D communication by using a broadcast mode, a radio resource control protocol RRC mode, or a physical layer signaling control mode or a combination of the foregoing manners. Bandwidth and modulation format of D2D communication, etc.
  • the high-level configuration parameter in the uplink power parameter is sent by the broadcast mode or the radio resource control protocol RRC, and the power control domain TPC is sent by the physical layer signaling.
  • the power offset transmitted by the network device is a power offset of the transmit power of the D2D communication relative to the uplink transmit power, and may use a high-level configuration parameter, or a physical layer configuration parameter, or a combination of a high-level configuration parameter and a physical layer configuration parameter.
  • the high-level configuration parameter notifies a first offset
  • the physical layer configuration parameter notifies a second offset
  • the first UE can obtain the power offset by combining the first offset and the second offset; Only the first offset or the second offset may be notified.
  • the network device may be an evolved base station (eNB) in the LTE system, or a base station (NB) in the Universal Mobile Telecommunications System (UMTS). It is another network device that communicates with the UE and performs resource scheduling for the UE.
  • eNB evolved base station
  • NB base station
  • UMTS Universal Mobile Telecommunications System
  • the network device sends the determined uplink transmit power parameter to the first UE of the D2D communication, and the first UE of the D2D communication determines, according to the downlink path loss estimation and the received uplink transmit power parameter,
  • the transmit power of the D2D communication that is, the D2D data is transmitted at the maximum transmit power of the first UE in the D2D communication in the prior art.
  • the transmit power of the D2D communication in the embodiment of the present invention is determined by using the downlink path loss estimation, so that the D2D communication is determined.
  • the D2D signal of the first UE undergoes the fading of the channel and the received power of the network device is not higher than the received power of the uplink signal of the first UE for uplink communication, and the D2D signal of the first UE of the D2D communication can be guaranteed.
  • the received power of the network device is equivalent to the received power of the uplink signals of other UEs to the network device, which can reduce or avoid in-band leakage interference, and does not affect the reception of uplink signals of other UEs, thereby reducing the impact of D2D communication on uplink communication.
  • embodiments of the invention may be provided as a method, system, or Computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明实施例提供一种通信方法及设备,本发明实施例中设备到设备 D2D通信的第一用户终端获取上行发射功率参数;所述第一用户终端根据所述上行发射功率参数和下行路径损耗估计,确定D2D通信的发射功率;以及所述第一用户终端根据所述D2D通信的发射功率发射D2D数据。通过本发明实施例能够降低带内泄漏对上行通信造成的不良影响。

Description

一种通信方法及设备
技术领域
本发明涉及无线通信技术领域, 尤其涉及一种通信方法及设备。 背景技术
传统的长期演进( Long Term Evolution, LTE )通信技术中,用户终端( user equipment, UE )之间进行通信的信令和数据都需要经过各自所属的演进型基 站 ( evolved Node B, eNB )进行交互。
设备到设备(Device to Device, D2D )作为一种直接通信技术, UE间的 通信数据不需要通过 eNB进行转发,可以在 UE间直接进行通信交互或者在网 络的辅助作用下直接进行通信交互。
LTE-D2D 是第三代合作伙伴计戈 ( 3rd Generation partnership project, 3GPP )最新定义的基于 LTE的 UE间直接通信的技术, LTE-D2D通信技术是 在现有的 LTE系统中增加的 D2D的应用, 即 D2D通信和 LTE通信会共存, 如图 1所示, UE1可向 UE2和 UE3发射 D2D通信数据进行 D2D通信, UE1 也可与 eNB之间进行通信。 其中, UE1发射通信数据、 eNB接收通信数据的 过程称为上行通信; eNB发射通信数据、 UE1接收通信数据的过程称为下行 通信; UE1作为数据发射方, 与 UE2和 UE3进行的 UE与 UE之间的通信为 D2D通信。
目前, 进行 D2D通信的 UE—般以最大功率发射 D2D数据, 然而与 eNB 进行上行通信时, eNB—般会依据距离和信道情况适当调整与 eNB进行通信 的各 UE的上行发射功率, 使到达 eNB的各个 UE的上行信号的接收功率比 较平衡。 一般距离 eNB较近的 UE的上行发射功率会小于距离 eNB较远的 UE的上行发射功率。如果进行 D2D通信的 UE以最大功率发射信号,并且当 进行 D2D通信的 UE距离 eNB较近时, 可能会出现如下情况: eNB接收到的 该进行 D2D通信的 UE所发射的信号的接收功率高于其他进行上行通信的 UE 所发射的上行信号的接收功率,此时会发生带内泄漏( In Band Emission, IBE )。 带内泄漏指接收功率较高的信号的能量泄漏到频域上相邻的接收能量较低的 信号中, 带内泄漏会影响 LTE系统中进行上行通信的 UE的信号的正常接收, 给 UE与 eNB之间的上行通信造成不良影响。 发明内容
本发明实施例提供一种通信方法及设备, 以降低带内泄漏对上行通信造 成的不良影响。
第一方面, 提供一种通信设备, 包括收发器、 处理器、 存储器和总线, 其中, 收发器、 处理器、 存储器均与总线连接, 其中,
所述存储器, 用于存储所述处理器执行的程序代码;
所述处理器, 用于调用所述存储器存储的程序, 获取上行发射功率参数, 并根据所述上行发射功率参数和下行路径损耗估计, 确定 D2D通信的发射功 率; 以及控制所述收发器根据所述 D2D通信的发射功率发射 D2D数据;
所述收发器,用于根据所述处理器确定的 D2D通信的发射功率发射 D2D 数据。
结合第一方面, 在第一种实现方式中, 所述处理器具体用于按如下方式 确定 D2D通信的发射功率:
依据所述上行发射功率参数、 D2D通信的发射带宽和所述下行路径损耗 估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功 率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式和下行路径损耗估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功率。
结合第一方面的第一种实现方式, 在第二种实现方式中, 所述处理器具 体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 将所述 上行发射功率, 确定为所述 D2D通信的发射功率。 结合第一方面的第一种实现方式, 在第三种实现方式中, 所述处理器具 体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 确定所 述上行发射功率所属的功率等级; 以及
根据第一对应关系, 确定所述 D2D通信的发射功率, 其中, 所述第一对 应关系为功率等级与 D2D通信的发射功率之间的对应关系。
结合第一方面的第三种实现方式, 在第四种实现方式中, 所述处理器具 体用于按如下方式确定所述上行发射功率所属的功率等级: 确定 D2D通信的 调制格式, 并确定上行发射功率在对应所述 D2D通信的调制格式下所属的功 率等级; 以及
依据所述上行发射功率、 所述 D2D通信的调制格式、 和各调制格式下的 功率等级与 D2D通信的发射功率之间的对应关系,确定 D2D通信的发射功率。
结合第一方面, 在第五种实现方式中, 所述处理器, 还用于: 获取功率 偏置量;
所述处理器具体用于按如下方式确定所述 D2D通信的发射功率: 依据所述上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计 以及所述功率偏置量, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通信的发射功率。
结合第一方面, 在第六种实现方式中, 所述处理器具体用于按如下方式 确定所述 D2D通信的发射功率:
依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功 依据确定的 D2D发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功 率参数的对应关系确定所述上行发射功率参数对应的所述 D2D 发射功率参 数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽、 D2D通信的调 制格式和下行路径损耗估计, 确定 D2D通信的发射功率。
结合第一方面的上述任一种实现方式, 在第七种实现方式中, 所述处理 器, 还用于:
根据所述 D2D通信的发射功率, 确定传输次数或重传次数;
所述收发器具体用于按如下方式发射 D2D数据:
根据所述处理器确定的所述传输次数和所述 D2D通信的发射功率, 发射 D2D数据; 或者
根据确定的所述重传次数和所述 D2D通信的发射功率, 发射 D2D数据。 结合第一方面的第七种实现方式, 在第八种实现方式中, 所述处理器具 体用于按如下方式确定传输次数或重传次数:
根据第二对应关系,确定传输次数或重传次数,所述第二对应关系为 D2D 通信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与 重传次数之间的对应关系。
结合第一方面的第七种实现方式, 或者第一方面的第八种实现方式, 在 第九种实现方式中, 所述收发器, 还用于:
发射传输次数信息, 所述传输次数信息用于第二用户终端根据所述传输 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端; 或者
发射重传次数信息, 所述重传次数信息用于第二用户终端根据所述重传 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端。
第二方面, 提供一种通信设备, 该通信设备包括收发器、 处理器、 存储 器和总线, 其中, 收发器、 处理器、 存储器均与总线连接, 其中,
所述存储器, 用于存储所述处理器执行的程序代码;
所述处理器, 调用所述存储器存储的程序, 用于确定上行发射功率参数; 所述收发器, 用于下发所述上行发射功率参数, 所述上行发射功率参数 用于设备到设备 D2D通信的第一用户终端根据下行路径损耗和所述上行发射 功率参数确定 D2D通信的发射功率。
结合第二方面, 在第一种实现方式中, 所述处理器, 还用于: 确定功率 偏置量;
所述收发器, 还用于: 下发所述功率偏置量;
其中, 所述功率偏置量用于所述第一用户终端根据所述功率偏置量、 所 述下行路径损耗估计和所述上行发射功率参数, 确定 D2D通信的发射功率。
结合第二方面, 或者第二方面的第一种实现方式, 在第二种实现方式中, 所述处理器, 还用于: 确定 D2D通信的发射带宽;
所述收发器, 还用于: 下发所述 D2D通信的发射带宽;
其中,所述 D2D通信的发射带宽用于所述第一用户终端根据所述 D2D通 信的发射带宽、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
结合第二方面的上述任一种实现方式, 在第三种实现方式中, 所述处理 器, 还用于: 确定 D2D通信的调制格式;
所述收发器, 还用于: 下发所述 D2D通信的调制格式;
其中,所述 D2D通信的调制格式用于所述第一用户终端根据所述 D2D通 信的调制格式、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
第三方面, 提供一种用户终端, 该用户终端包括: 接收单元、 确定单元 和发射单元, 其中,
所述确定单元, 用于获取网络设备发射的上行发射功率参数, 并根据下 行路径损耗估计和所述接收单元接收的所述上行发射功率参数, 确定 D2D通 信的发射功率;
所述发射单元, 用于根据所述确定单元确定的所述 D2D通信的发射功率, 发射 D2D数据。
结合第三方面, 在第一种实现方式中, 所述确定单元具体用于按如下方 式确定 D2D通信的发射功率: 依据所述上行发射功率参数、 D2D通信的发射带宽和所述下行路径损耗 估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功 率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式和下行路径损耗估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功率。
结合第三方面的第一种实现方式, 在第二种实现方式中, 所述确定单元 具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 将所 述上行发射功率, 确定为所述 D2D通信的发射功率。
结合第三方面的第一种实现方式, 在第三种实现方式中, 所述确定单元 具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 确定 所述上行发射功率所属的功率等级; 以及
根据第一对应关系, 确定所述 D2D通信的发射功率, 所述第一对应关系 为功率等级与 D2D通信的发射功率之间的对应关系。
结合第三方面的第三种实现方式, 在第四种实现方式中, 所述确定单元 具体用于按如下方式确定所述上行发射功率所属的功率等级: 依据所述上行 发射功率, 确定所述上行发射功率在对应所述 D2D通信的各调制格式下所属 的功率等级; 以及
所述确定单元具体用于按如下方式确定所述 D2D通信的发射功率: 依据 所述上行发射功率、 所述 D2D通信的调制格式、 和各调制格式下的功率等级 与 D2D通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
结合第三方面, 在第五种实现方式中, 所述确定单元, 还用于: 获取功 率偏置量;
所述确定单元具体用于按如下方式确定所述 D2D通信的发射功率: 依据所述上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计 以及所述功率偏置量, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通信的发射功率。 结合第三方面, 在第六种实现方式中, 所述确定单元具体用于按如下方 式确定所述 D2D通信的发射功率:
依据所述上行发射功率参数, 按照预设的对应关系确定 D2D发射功率参 数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽和下行路径损耗 估计, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数, 按照预设的对应关系确定 D2D发射功率参 数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽、 D2D通信的调 制格式和下行路径损耗估计, 确定 D2D通信的发射功率。
结合第三方面的上述任一种实现方式, 在第七种实现方式中, 所述确定 单元, 还用于: 根据所述 D2D通信的发射功率, 确定传输次数或重传次数; 所述发射单元具体用于按如下方式发射 D2D数据: 根据确定的所述传输 次数和所述 D2D通信的发射功率,发射 D2D数据; 或者根据确定的所述重传 次数和所述 D2D通信的发射功率, 发射 D2D数据。
结合第三方面的第七种实现方式, 在第八种实现方式中, 所述确定单元 具体用于按如下方式确定传输次数或重传次数:
根据第二对应关系,确定传输次数或重传次数,所述第二对应关系为 D2D 通信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与 重传次数之间的对应关系。
结合第三方面的第七种实现方式, 或者第三方面的第八种实现方式, 在 第九种实现方式中, 所述发射单元, 还用于:
发射传输次数信息, 所述传输次数信息用于第二用户终端根据所述传输 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端; 或者
发射重传次数信息, 所述重传次数信息用于第二用户终端根据所述重传 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端。 第四方面, 提供一种网络设备, 该网络设备包括确定单元和下发单元, 其中,
所述确定单元, 用于确定上行发射功率参数; 所述上行发射功率参数用于设备到设备 D2D通信的第一用户终端根据下行路 径损耗和所述上行发射功率参数确定 D2D通信的发射功率。
结合第四方面, 在第一种实现方式中, 所述确定单元, 还用于: 确定功 率偏置量;
所述下发单元, 还用于: 下发所述功率偏置量;
其中, 所述功率偏置量用于所述第一用户终端根据所述功率偏置量、 所 述下行路径损耗估计和所述上行发射功率参数, 确定所述 D2D通信的发射功 率。
结合第四方面, 或者第四方面的第一种实现方式, 在第二种实现方式中, 所述确定单元, 还用于: 确定 D2D通信的发射带宽;
所述下发单元, 还用于: 下发所述 D2D通信的发射带宽;
其中,所述 D2D通信的发射带宽用于所述第一用户终端根据所述 D2D通 信的发射带宽、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
结合第四方面的上述任一种实现方式, 在第三种实现方式中, 所述确定 单元, 还用于: 确定 D2D通信的调制格式;
所述下发单元, 还用于: 下发所述 D2D通信的调制格式;
其中,所述 D2D通信的调制格式用于所述第一用户终端根据所述 D2D通 信的调制格式、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
第五方面, 提供一种通信方法, 包括:
设备到设备 D2D通信的第一用户终端获取网络设备发射的上行发射功率 参数; 所述第一用户终端根据所述上行发射功率参数和下行路径损耗估计, 确 定 D2D通信的发射功率; 以及
所述第一用户终端根据所述 D2D通信的发射功率发射 D2D数据。
结合第五方面, 在第一种实现方式中, 第一用户终端根据所述上行发射 功率参数和所述下行路径损耗估计, 确定 D2D通信的发射功率, 包括:
所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽和 所述下行路径损耗估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功率; 或者
所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 确定上行发射功率, 并依据所述 上行发射功率确定 D2D通信的发射功率。
结合第五方面的第一种实现方式, 在第二种实现方式中, 所述依据所述 上行发射功率确定 D2D通信的发射功率, 包括:
所述第一用户终端将所述上行发射功率, 确定为所述 D2D通信的发射功 率。
结合第五方面的第一种实现方式, 在第三种实现方式中, 所述依据所述 上行发射功率确定 D2D通信的发射功率, 包括:
所述第一用户终端确定所述上行发射功率所属的功率等级; 以及 所述第一用户终端根据第一对应关系, 确定所述 D2D通信的发射功率, 所述第一对应关系为功率等级与 D2D通信的发射功率之间的对应关系。
结合第五方面的第三种实现方式, 在第四种实现方式中,
所述第一用户终端确定所述上行发射功率所属的功率等级, 包括: 所述第一用户终端确定 D2D通信的调制格式;
所述第一用户终端依据上行发射功率参数、 D2D 通信的发射带宽、 D2D 通信的调制格式和下行路径损耗估计, 确定上行发射功率, 并确定所述上行 发射功率在对应所述 D2D通信的调制格式下所属的功率等级;
所述第一用户终端根据第一对应关系,确定 D2D通信的发射功率, 包括: 所述第一用户终端依据所述上行发射功率、 所述 D2D通信的调制格式、 和各调制格式下的功率等级与 D2D 通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
结合第五方面, 在第五种实现方式中, 该方法还包括:
所述第一用户终端获取功率偏置量;
所述第一用户终端根据所述上行发射功率参数和所述下行路径损耗估 计, 确定 D2D通信的发射功率, 包括:
所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通信的发射功率; 或者 所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通 信的发射功率。
结合第五方面, 在第六种实现方式中, 第一用户终端根据所述上行发射 功率参数和所述下行路径损耗估计, 确定 D2D通信的发射功率, 包括:
所述第一用户终端依据所述上行发射功率参数, 按照预设的对应关系确 定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射 带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者
所述第一用户终端依据所述上行发射功率参数, 按照预设的对应关系确 定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射 带宽、 D2D通信的调制格式和下行路径损耗估计,确定 D2D通信的发射功率。
结合第五方面的上述任一种实现方式, 在第七种实现方式中, 所述第一 用户终端确定 D2D通信的发射功率之后, 该方法还包括:
所述第一用户终端根据所述 D2D通信的发射功率, 确定传输次数或重传 次数;
所述第一用户终端根据确定的所述 D2D通信的发射功率发射数据,包括: 所述第一用户终端根据确定的所述传输次数和所述 D2D 通信的发射功 率, 发射 D2D数据; 或者 所述第一用户终端根据确定的所述重传次数和所述 D2D 通信的发射功 率, 发射 D2D数据。
结合第五方面的第七种实现方式, 在第八种实现方式中, 所述第一用户 终端根据所述 D2D通信的发射功率, 确定传输次数或重传次数, 包括: 所述第一用户终端根据第二对应关系, 确定传输次数或重传次数, 所述 第二对应关系为 D2D 通信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与重传次数之间的对应关系。
结合第五方面的第七种实现方式或者第五方面的第八种实现方式, 在第 九种实现方式中, 所述第一用户终端确定传输次数或重传次数之后, 该方法 还包括:
所述第一用户终端发射传输次数信息, 所述传输次数信息用于第二用户 终端根据所述传输次数信息接收数据, 所述第二用户终端是与所述第一用户 终端进行 D2D通信的终端; 或者
所述第一用户终端发射重传次数信息, 所述重传次数信息用于第二用户 终端根据所述重传次数信息接收数据, 所述第二用户终端是与所述第一用户 终端进行 D2D通信的终端。
第六方面, 提供一种通信方法, 包括:
网络设备确定上行发射功率参数;
网络设备下发所述上行发射功率参数, 所述上行发射功率参数用于设备 到设备 D2D通信的第一用户终端根据下行路径损耗估计和所述上行发射功率 参数确定 D2D通信的发射功率。
结合第六方面, 在第一种实现方式中, 该方法还包括:
所述网络设备确定并下发功率偏置量;
所述功率偏置量用于所述第一用户终端根据所述功率偏置量、 所述下行 路径损耗估计和所述上行发射功率参数, 确定 D2D通信的发射功率。
结合第六方面或者第六方面的第一种实现方式, 在第二种实现方式中, 该方法还包括: 所述网络设备确定并下发 D2D通信的发射带宽;
所述 D2D通信的发射带宽用于所述第一用户终端根据所述 D2D通信的发 射带宽、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行发射功 率。
结合第六方面的上述任一种实现方式, 在第三种实现方式中, 该方法还 包括:
所述网络设备确定并下发 D2D通信的调制格式;
所述 D2D通信的调制格式用于所述第一用户终端根据所述 D2D通信的调 制格式、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行发射功 率。
第七方面, 提供一种通信系统, 该通信系统包括网络设备和用户终端, 所述网络设备为第四方面任一种实现方式提供的网络设备, 所述用户终端为 第三方面任一种实现方式提供的用户终端。
本发明实施例提供的通信方法及设备, D2D通信的第一 UE根据下行路 径损耗估计和接收到的上行发射功率参数, 确定进行 D2D通信的发射功率, 即相对现有技术中 D2D通信的第一 UE以最大发射功率发射 D2D数据,本发 明实施例 D2D 通信的发射功率是釆用下行路径损耗估计进行确定的, 使得 D2D通信的第一 UE的 D2D信号经历信道的衰落后到达网络设备的接收功率 不会高于该第一 UE进行上行通信的上行信号到达网络设备的接收功率,可以 保证 D2D通信的第一 UE的 D2D信号到达网络设备的接收功率与其他 UE的 上行信号到达网络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行通信的 影响。 附图说明
图 1为 D2D通信系统通信过程示意图;
图 2为本发明实施例一提供的通信设备构成示意图; 图 3为本发明实施例二提供的通信设备构成示意图;
图 4为本发明实施例三提供的用户终端构成示意图;
图 5为本发明实施例四提供的网络设备构成示意图;
图 6为本发明实施例五提供的通信系统构成示意图;
图 7A-图 7E为本发明实施例六提供的通信方法流程图;
图 8为本发明实施例七提供的通信方法流程图;
图 9为本发明实施例八提供的通信方法流程图;
图 10为本发明实施例九提供的通信方法流程图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创 造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例提供的通信方法及设备应用于 D2D通信技术, D2D通信技 术可应用于各通信场景中, 例如 LTE、 2G或 3G等。 进行 D2D通信的过程示 意图可参阅图 1 , UE1 与网络设备进行通信, UE1发射通信数据、 网络设备 接收通信数据的过程称为上行通信, 网络设备发射通信数据、 UE1 接收通信 数据的过程称为下行通信。 网络设备对 UE1进行上行通信时的上行发射功率 进行功率控制, 目标是使网络设备接收到的 UE1的上行信号的接收功率和网 络设备接收到的其他 UE的上行信号的接收功率相当。本发明实施例以下涉及 的上行发射功率是指 UE到网络设备之间的发射功率。 UE1作为数据发射方, 与 UE2和 UE3进行的 UE与 UE之间的通信为 D2D通信, UE1调整 D2D通 信的发射功率, 本发明实施例中 UE1调整 D2D通信的发射功率调控时,根据 UE1与网络设备间进行上行通信时的上行发射功率, 确定 D2D通信的发射功 率, 并根据确定的 D2D通信发射功率发射 D2D数据。 本发明实施例中由于 UE1的 D2D通信的发射功率是依据 UE1到网络设备的上行发射功率确定的, 使 UE1进行 D2D通信的发射信号和其他 UE的上行信号在到达网络设备时的 接收功率相当,对于其他 UE与网络设备的上行通信的带内泄漏尽量降低,提 高系统性能。
需要说明的是, 本发明实施例中的网络设备既可以是 LTE系统中的演进 型基站 ( eNB ) , 也可以是通用移动通信系统 ( Universal Mobile Telecommunications System, UMTS ) 中的基站 (NB ), 还可以是其他与 UE 进行通信并为 UE进行资源调度的网络设备等 ,本发明实施例以下以网络设备 为 LTE系统中的 eNB为例进行说明。 进行详细说明。
本发明实施例中, 将 D2D通信中发射 D2D数据的 UE称为第一 UE, 该 第一 UE对进行 D2D通信的发射功率进行调控, 将 D2D通信中接收第一 UE 发射的 D2D数据的 UE称为第二 UE。
实施例一
本发明实施例一提供一种通信设备 100 , 该通信装 100可以执行后续实施 例六至实施例九的方法步骤, 如图 2所示为本发明实施例提供的一种通信设备 的构成示意图, 图 2所示, 该通信设备包括收发器 11、 处理器 12、 存储器 13和 总线 14, 其中, 收发器 11、 处理器 12、 存储器 13均与总线 14连接, 其中, 存储器 13 , 用于存储处理器 12执行的程序代码;
处理器 12, 用于调用存储器 13存储的程序, 获取上行发射功率参数, 并 根据该上行发射功率参数和下行路径损耗估计, 确定 D2D通信的发射功率; 以及控制收发器 11根据 D2D通信的发射功率发射 D2D数据;
收发器 11 , 用于接收网络设备发射的上行发射功率参数, 并根据处理器 12确定的 D2D通信的发射功率发射 D2D数据。
其中, 上行发射功率参数可以是收发器 11接收到的, 处理器 12可以是 从收发器 11获取该上行发射功率参数; 或者, 处理器 12还可以是从存储器 13获取该上行发射功率参数, 存储器 13存储了收发器 11预先接收到的该上 行发射功率参数。
结合上述实施例一, 在第一种实现方式中, 处理器 12, 按如下方式确定 D2D通信的发射功率:
依据上行发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确 定上行发射功率, 并依据上行发射功率确定 D2D通信的发射功率; 或者
依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和 下行路径损耗估计, 确定上行发射功率, 并依据上行发射功率确定 D2D通信 的发射功率。
结合上述实施例一的第一种实现方式, 在第二种实现方式中, 处理器 12 具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 将上 行发射功率, 作为 D2D通信的发射功率。
结合上述实施例一的第一种实现方式, 在第三种实现方式中, 处理器 12 具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 确定 上行发射功率所属的功率等级; 以及
根据第一对应关系, 确定 D2D通信的发射功率, 其中, 第一对应关系为 功率等级与 D2D通信的发射功率之间的对应关系。
需要说明的是, 该第一对应关系存储在存储器 13中, 可以是预先配置到 该用户终端, 也可以收发器 11是从网络设备中接收到后存储到存储器 13中。 后文所提到的对应关系同此类似, 不再赘述。
结合上述实施例一的第三种实现方式, 在第四种实现方式中, 处理器 12 具体用于按如下方式确定所述上行发射功率所属的功率等级: 确定 D2D通信 的调制格式, 并确定上行发射功率在对应该 D2D通信的调制格式下所属的功 率等级; 以及
依据上行发射功率、 D2D通信的调制格式、 和各调制格式下的功率等级 与 D2D通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
结合上述实施例一, 在第五种实现方式中, 收发器 11 , 还用于: 获取功 率偏置量; 处理器 12, 具体用于按如下方式确定所述 D2D通信的发射功率: 依据上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计以及 功率偏置量, 确定 D2D通信的发射功率; 或者
依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及功率偏置量, 确定 D2D通信的发射功率。
结合上述实施例一, 在第六种实现方式中, 处理器 12具体用于按如下方 式确定所述 D2D通信的发射功率:
依据上行发射功率参数, 按照预设的对应关系确定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者
依据上行发射功率参数, 按照预设的对应关系确定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式和下行路径损耗估计, 确定 D2D通信的发射功率。
结合上述实施例一的上述任一种实现方式, 在第七种实现方式中, 处理 器 12, 还用于:
根据 D2D通信的发射功率, 确定传输次数或重传次数;
收发器 11 , 具体用于按如下方式发射 D2D数据:
根据确定的传输次数和 D2D通信的发射功率, 发射 D2D数据; 或者 根据确定的重传次数和 D2D通信的发射功率, 发射 D2D数据。
结合上述实施例一的第七种实现方式, 在第八种实现方式中, 处理器 12, 具体用于按如下方式确定传输次数或重传次数:
根据第二对应关系, 确定传输次数或重传次数, 第二对应关系为 D2D通 信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与重 传次数之间的对应关系。
结合上述实施例一的第七种实现方式, 或者上述实施例一的第八种实现 方式, 在第九种实现方式中, 收发器 11 , 还用于:
发射传输次数信息, 传输次数信息用于第二用户终端根据该传输次数信 息接收数据, 第二用户终端是与第一用户终端进行 D2D通信的终端; 或者 发射重传次数信息, 重传次数信息用于第二用户终端根据该重传次数信 息接收数据, 第二用户终端是与第一用户终端进行 D2D通信的终端。
结合上述实施例一的第九种实现方式, 在第十种实现方式中, 收发器 11 , 用于:
在调度信令通知中, 发射传输次数信息或重传次数信息。
本发明实施例上述通信设备进行 D2D通信的发射功率确定时, 根据下行 路径损耗估计和接收到的上行发射功率参数,确定进行 D2D通信的发射功率, 即相对现有技术中 D2D通信的第一 UE以最大发射功率发射 D2D数据,本发 明实施例 D2D 通信的发射功率是釆用下行路径损耗估计进行确定的, 使得 D2D通信的 UE的 D2D信号经历信道的衰落后到达网络设备的接收功率不会 高于该 UE进行上行通信的上行信号到达网络设备的接收功率,可以保证 D2D 通信的 UE的 D2D信号到达网络设备的接收功率与其他 UE的上行信号到达 网络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行通信的影响。
实施例二
本发明实施例二提供一种通信设备 200,该通信设备 200用于执行后续实 施例九涉及的方法流程, 图 3所示为本发明实施例二提供的通信设备 200构 成示意图, 如图 3所示, 该通信设备 200包括收发器 21、 处理器 22、 存储器 23和总线 24, 其中, 收发器 21、 处理器 22、 存储器 23均与总线 24连接, 其中,
存储器 23 , 用于存储处理器 22执行的程序代码;
处理器 22, 调用存储器 23存储的程序, 用于确定上行发射功率参数; 收发器 21 , 用于下发处理器 22确定的上行发射功率参数, 上行发射功率 参数用于设备到设备 D2D通信的第一用户终端根据下行路径损耗和上行发射 功率参数确定 D2D通信的发射功率。
结合上述实施例二, 在第一种实现方式中, 处理器 22, 还用于: 确定功 率偏置量;
收发器 21 , 还用于: 下发功率偏置量;
其中, 功率偏置量用于第一用户终端根据功率偏置量、 下行路径损耗估 计和上行发射功率参数, 确定 D2D通信的发射功率。
结合上述实施例二, 或者结合上述实施例二的第一种实现方式, 在第二 种实现方式中, 处理器 22, 还用于: 确定 D2D通信的发射带宽;
收发器 21 , 还用于: 下发 D2D通信的发射带宽;
其中, D2D通信的发射带宽用于第一用户终端根据 D2D通信的发射带宽、 下行路径损耗估计和上行发射功率参数, 确定上行发射功率。
结合实施例二的上述任一种实现方式, 在第三种实现方式中, 处理器 22, 还用于: 确定 D2D通信的调制格式;
收发器 21 , 还用于: 下发 D2D通信的调制格式;
其中, D2D通信的调制格式用于第一用户终端根据 D2D通信的调制格式、 下行路径损耗估计和上行发射功率参数, 确定上行发射功率。
结合上述实施例二的第一种实现方式, 在第四种实现方式中, 收发器 21 釆用广播方式、 无线资源控制协议 RRC信令方式和物理层信令控制方式中的 至少一种方式, 下发功率偏置量。
本发明实施例上述通信设备下发上行发射功率参数、 功率偏置量、 D2D 通信的发射带宽或 D2D通信的调制格式等进行, 使得进行 D2D通信的 UE进行 D2D通信的发射功率确定时, 根据下行路径损耗估计和接收到的上行发射功 率参数, 确定进行 D2D通信的发射功率, 即相对现有技术中 D2D通信的第一 UE以最大发射功率发射 D2D数据, 本发明实施例 D2D通信的发射功率是釆用 下行路径损耗估计进行确定的, 使得 D2D通信的 UE的 D2D信号经历信道的衰 落后到达网络设备的接收功率不会高于该 UE进行上行通信的上行信号到达网 络设备的接收功率, 可以保证 D2D通信的 UE的 D2D信号到达网络设备的接收 功率与其他 UE的上行信号到达网络设备的接收功率相当, 能够降低或者避免 带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信 对上行通信的影响。
实施例三
本发明实施例三提供一种 UE300,该 UE300用于执行后续实施例六至实施 例八涉及的方法流程, 图 4所示为本发明实施例提供的 UE300构成示意图, 如 图 4所示, 本发明实施例提供的 UE300包括: 接收单元 31、 确定单元 32和发射 单元 33 , 其中,
确定单元 32 , 用于获取上行发射功率参数, 并根据下行路径损耗估计和 接收单元 31接收的上行发射功率参数, 确定 D2D通信的发射功率;
发射单元 33 ,用于根据确定单元 32确定的 D2D通信的发射功率,发射 D2D 数据。
可选的, 本发明实施例提供的 UE300还可以包括存储单元(未图示), 存 储单元可以用于存储上行发射功率参数, 确定单元 32是用于从该存储单元获 取上行发射功率参数的, 其中, 存储单元存储的上行发射功率参数是接收单 元 31从网络设备接收到的。
可选地, 接收单元 31 , 用于接收网络设备发射的上行发射功率参数; 确 定单元 32是从该接收单元 31获取上行发射功率参数的。
结合上述实施例三, 在第一种实现方式中, 确定单元 32, 具体用于按如 下方式确定 D2D通信的发射功率:
依据上行发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确 定上行发射功率, 并依据上行发射功率确定 D2D通信的发射功率; 或者
依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和 下行路径损耗估计, 确定上行发射功率, 并依据上行发射功率确定 D2D通信 的发射功率。
结合上述实施例三的第一种实现方式, 在第二种实现方式中, 确定单元 32具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率:将 上行发射功率, 作为 D2D通信的发射功率。
结合上述实施例三的第一种实现方式, 在第三种实现方式中, 确定单元 32, 具体用于按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 确定上行发射功率所属的功率等级; 以及
根据第一对应关系, 确定 D2D通信的发射功率, 第一对应关系为功率等 级与 D2D通信的发射功率之间的对应关系。
结合上述实施例三的第三种实现方式, 在第四种实现方式中, 确定单元
32, 具体用于按如下方式确定所述上行发射功率所属的功率等级: 确定 D2D 通信的调制格式, 并确定上行发射功率在对应该 D2D通信的调制格式下所属 的功率等级; 以及
确定单元 32, 具体用于按如下方式确定所述上行发射功率所属的功率等 级: 依据上行发射功率、 D2D通信的调制格式、 和各调制格式下的功率等级 与 D2D通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
结合上述实施例三, 在第五种实现方式中, 确定单元 32, 还用于: 获取 功率偏置量;
确定单元 32, 具体用于按如下方式确定所述 D2D通信的发射功率: 依据上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计以及 功率偏置量, 确定 D2D通信的发射功率; 或者
依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及功率偏置量, 确定 D2D通信的发射功率。
可选地, 功率偏置量可以是存储单元中存储的, 确定单元 32从该存储单 元中获取功率偏置量; 或者, 功率偏置量可以是接收单元 31从网络设备接收 到的, 确定单元 32从该接收单元 31中获取功率偏置量。
结合上述实施例三, 在第六种实现方式中, 确定单元 32, 具体用于按如 下方式确定所述 D2D通信的发射功率:
依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功
依据确定的 D2D发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者 依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功 率参数的对应关系确定所述上行发射功率参数对应的所述 D2D 发射功率参 数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽、 D2D通信的调 制格式和下行路径损耗估计, 确定 D2D通信的发射功率。
可选地, 该对应关系可以是预先配置到存储单元中的, 确定单元从该存 储单元中获取该对应关系, 或者, 对应关系可以是接收单元从网络设备接收 到的, 确定单元从该接收单元中获取该对应关系。 本实施例中其他对应关系 也可以与此类似, 本文不再赘述。
结合上述实施例三的上述任一种实现方式, 在第七种实现方式中, 确定 单元 32, 还用于: 根据 D2D通信的发射功率, 确定传输次数或重传次数; 发射单元 33 , 具体用于按如下方式发射 D2D数据: 根据确定的传输次数 和 D2D通信的发射功率, 发射 D2D数据; 或者根据确定的重传次数和 D2D 通信的发射功率, 发射 D2D数据。
结合上述实施例三的第七种实现方式, 在第八种实现方式中, 确定单元
32, 具体用于按如下方式确定传输次数或重传次数:
根据第二对应关系, 确定传输次数或重传次数, 第二对应关系为 D2D通 信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与重 传次数之间的对应关系。
结合上述实施例三的第七种实现方式, 或者上述实施例三的第八种实现 方式, 在第九种实现方式中, 发射单元 33 , 还用于:
发射传输次数信息,传输次数信息用于第二 UE根据该传输次数信息接收 数据, 第二 UE是与第一 UE进行 D2D通信的终端; 或者
发射重传次数信息,重传次数信息用于第二 UE根据该重传次数信息接收 数据, 第二 UE是与第一 UE进行 D2D通信的终端。
结合上述实施例三的第九种实现方式, 在第十种实现方式中, 发射单元
33 , 具体用于按如下方式发射传输次数信息或重传次数信息:
在调度信令通知中, 发射传输次数信息或重传次数信息。 本发明实施例中提供的 UE, 在进行 D2D通信的发射功率确定时, 根据 下行路径损耗估计和接收到的上行发射功率参数, 确定进行 D2D通信的发射 功率, 即相对现有技术中 D2D通信的 UE以最大发射功率发射 D2D数据, 本 发明实施例 D2D通信的发射功率是釆用下行路径损耗估计进行确定的, 使得 D2D通信的 UE的 D2D信号经历信道的衰落后到达网络设备的接收功率不会 高于该 UE进行上行通信的上行信号到达网络设备的接收功率,可以保证 D2D 通信的 UE的 D2D信号到达网络设备的接收功率与其他 UE的上行信号到达 网络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行通信的影响。
实施例四
本发明实施例四提供一种网络设备 400,该网络设备 400用于执行后续实 施例九涉及的方法流程, 图 5所示为本发明实施例四提供的网络设备 400构 成示意图, 如图 5所示, 该网络设备 400包括确定单元 41和下发单元 42, 其 中,
确定单元 41 , 用于确定上行发射功率参数;
下发单元 42, 用于下发确定单元 41确定的上行发射功率参数, 上行发射 功率参数用于设备到设备 D2D通信的第一 UE根据下行路径损耗和上行发射 功率参数确定 D2D通信的发射功率。
结合上述实施例四, 在第一种实现方式中, 确定单元 41 , 还用于: 确定 功率偏置量;
下发单元 42, 还用于: 下发功率偏置量;
其中, 功率偏置量用于第一 UE根据功率偏置量、 下行路径损耗估计和上 行发射功率参数, 确定 D2D通信的发射功率。
结合上述实施例四, 或者上述实施例四的第一种实现方式, 在第二种实 现方式中, 确定单元 41 , 还用于: 确定 D2D通信的发射带宽;
下发单元 42, 还用于: 下发 D2D通信的发射带宽;
其中, D2D通信的发射带宽用于第一 UE根据 D2D通信的发射带宽、 下 行路径损耗估计和上行发射功率参数, 确定上行发射功率。
需要说明的是, 本实施例中, 下发单元 42可以仅下发功率偏置量和 D2D 通信的发射带宽中的一个或者二者都下发。 如果下发单元 42仅下发 D2D通 信的发射带宽, 第一 UE根据该 D2D通信的发射带宽、 下行路径损耗估计和 上行发射功率参数, 确定上行发射功率, 不使用功率偏置量或者使用预先配 置的功率偏置量均可以实现; 如果下发单元 42仅下发功率偏置量, 第一 UE 在确定上行发射功率是可以使用预先配置的 D2D通信的发射带宽, 或者使用 其他预先配置的带宽值。
结合上述实施例四的任一种实现方式, 在第三种实现方式中, 确定单元 41 , 还用于: 确定 D2D通信的调制格式;
下发单元 42, 还用于: 下发 D2D通信的调制格式;
其中, D2D通信的调制格式用于第一 UE根据 D2D通信的调制格式、 下 行路径损耗估计和上行发射功率参数, 确定上行发射功率。
结合上述实施例四的第一种实现方式, 在第四种实现方式中, 下发单元 42具体用于按如下方式下发所述功率偏置量: 釆用广播方式、 无线资源控制 协议 RRC信令方式和物理层信令控制方式中的至少一种方式, 下发功率偏置 量。 通信的发射带宽或 D2D通信的调制格式等进行, 使得进行 D2D通信的 UE进行 D2D通信的发射功率确定时, 根据下行路径损耗估计和接收到的上行发射功 率参数, 确定进行 D2D通信的发射功率, 即相对现有技术中 D2D通信的 UE以 最大发射功率发射 D2D数据,本发明实施例 D2D通信的发射功率是釆用下行路 径损耗估计进行确定的, 使得 D2D通信的 UE的 D2D信号经历信道的衰落后到 达网络设备的接收功率不会高于该 UE进行上行通信的上行信号到达网络设备 的接收功率, 可以保证 D2D通信的 UE的 D2D信号到达网络设备的接收功率与 其他 UE的上行信号到达网络设备的接收功率相当, 能够降低或者避免带内泄 漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行 通信的影响。
实施例五
本发明实施例五提供一种通信系统 500,该通信系统 500包括上述实施例 三涉及的 UE300和实施例四涉及的网络设备 400, 图 6所示为本发明实施例 提供的通信系统构成示意图。
本发明实施例提供的通信系统中包括的 UE 和网络设备具备上述实施例 中涉及的全部功能, 具体可参阅上述实施例的相关描述, 本发明实施例在此 不再赘述。
本发明实施例提供的通信系统, UE在进行 D2D通信的发射功率确定时, 根据下行路径损耗估计和接收到的上行发射功率参数, 确定进行 D2D通信的 发射功率,即相对现有技术中 D2D通信的 UE以最大发射功率发射 D2D数据, 本发明实施例 D2D通信的发射功率是釆用下行路径损耗估计进行确定的, 使 得 D2D通信的 UE的 D2D信号经历信道的衰落后到达网络设备的接收功率不 会高于该 UE 进行上行通信的上行信号到达网络设备的接收功率, 可以保证 D2D通信的 UE的 D2D信号到达网络设备的接收功率与其他 UE到网络设备 的上行信号到达网络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行通信的 影响。
实施例六
基于上述实施例一和实施例三提供的通信设备, 本发明实施例六提供一 种通信方法, 图 7A所示为本发明实施例提供的通信方法实现流程图, 本发明 实施例中以实现图 7A所示的通信方法的执行主体为第一 UE为例进行说明, 如图 7A所示该方法包括:
S101 : 第一 UE获取上行发射功率参数。
S102: 第一 UE根据下行路径损耗估计和接收到的上行发射功率参数,确 定 D2D通信的发射功率。
S103:第一 UE根据 S102中确定的 D2D通信的发射功率发射 D2D数据。 其中, 第一 UE获取上行发射功率参数可以参照上文的描述,本实施例不 再赘述。
本发明实施例以下将分别对 S102和 S103的具体实现过程进行说明。 本发明实施例执行上述 S102时,第一 UE可以根据实际进行的是第一 UE 与第二 UE之间的 D2D通信, 还是第一 UE与网络设备进行的上行通信, 确 定相应链路的发射功率。 第一 UE确定 D2D通信的发射功率时, 上行发射功 率参数可以是由网络设备下发的。
UE进行 D2D通信可以有最大发射功率 «的限制 , D2D通信的发射功率 p不超过最大发射功率 D2D通信的最大发射功率15"^可以预定义或者是 由网络侧下发,当 UE依据下行路径损耗估计和上行发射功率参数确定的 D2D 通信的发射功率 p大于 D2D通信的最大发射功率15"^时, UE选择 D2D通信 的最大发射功率 »作为最终的 D2D通信的发射功率。 此时, UE的 D2D通 信信号到网络设备的接收功率小于其他 UE上行信号到网络设备的接收功率, UE的 D2D通信信号不对上行通信产生影响。
本发明实施例中,当第一 UE依据下行路径损耗估计和上行发射功率参数 确定的 D2D通信的发射功率大于 D2D通信的最大发射功率时,选择取值更小 的 D2D通信的最大发射功率, 避免对其他 UE上行信号的带内泄漏, 对上行 通信的影响进一步降低,而且釆用 D2D通信的最大发射功率进行 D2D数据的 发送, 可以保证 D2D通信的正常进行, 节省 UE的发射功率。 可以是网络设备釆用单播形式下发, 例如釆用 RRC ( radio resource control无 线资源控制)信令或者物理层信令方式下发, 或者网络设备也可以釆用广播 单播结合的方式下发。
具体的, 本发明实施例中根据下行路径损耗估计和上行发射功率参数, 进行 D2D通信的发射功率的确定时, 可优选如下方式:
第一种方式 S102a: 第一 UE依据上行发射功率参数、 D2D通信的发射带宽和下行路 径损耗估计, 确定上行发射功率, 并依据上行发射功率确定 D2D通信的发射 功率。
其中, 第一 UE依据上行发射功率参数、 D2D通信的发射带宽和下行路 径损耗估计( downlink pathloss estimate ), 按照上行发射功率确定机制确定上 行发射功率。
上行发射功率是由慢速的开环功率控制和快速的闭环功率控制两部分组 定上行发射功率的任何方法, 例如对于服务小区 c, 当子帧 (subframe) i 中 只有在物理上行共享信道( Physical Uplink Shared Channel, PUSCH )传输的 上行数据时, 上行发射功率确定机制可参照公式(1 ):
n ■、 . ¾MAX,c(''), )
' [10 log10 ( PUSCH;C ( )) + ¾_ρυ8θΗ,ο U) + ac (j) - PLC + AXF>C ( ) + fc ( ) J , ( j ) 其中, 公式( 1 ) 中 PpUSC()为上行发射功率; PCMAx )为 UE的最大额定 发射功率; p。-p^¾ /')和 O)为高层配置参数; ')为上行通信的发射带 宽, 为 UE 与服务小区 c 的网络设备之间的下行路径损耗估计; fc ('■) = fc ('■ -丄) + ^PUSCHp ('■ - PUSCH)或 fc ('■) = ^PUSCH,c ('■ - PUSCH) , ^PUSCHp为功率调整值 , 是一个子帧偏置量; ^ ^ ^—^ 叫, 是由高层配置 参数 deltaMCS-Enabled提供的, deltaMCS-Enabled的不同取值对应 =1+25或
PUSCH
Ks=Q , BPRE和 P t 为控制信令和数据都在 PUSCH上发射所需的参数。
现有技术中, 功率调整值 ^USCHP指动态的包含在物理下行控制信道
( Physical Downlink Control Channel, PDCCH )或者加强型物理下行控制信道 ( Enhanced Physical Downlink Control Channel, PDCCH ) 的下行链路控制信 息 (Downlink Control Information, DCI )版本 ( format ) 0或版本 4中的发 射功率控制域( Transmission Power Control, TPC ), 或者是在 PDCCH DCI版 本 3 或版本 3A 中 的 TPC 。 ^USCHP可以根据高层设置参数 Accumulation-enabled (累积值激活参数)是否被激活选取累积值(对功率在 前一子 帧基础上 累 积 ·^ ('X G - D + ^PUSCH^' - ^PUSCH) ) 或者绝对值
( C « = ^PUSCH,C - ^PUSCH) ),例如当 Accumulation-enabled被激活(即为 enabled ) 时, TPC的 DCI版本为 0或 3或 4时,选择表 1中的累积值一列, TPC的 DCI 版本为 3 A时, 选择表 2中的累积值一列, 当 Accumulation-enabled未被激活
(即为 disabled ), TPC的 DCI版本为 0或 4时, 选择表 1中的绝对值一列。
Figure imgf000028_0001
Figure imgf000028_0002
表 2
本发明实施例中, 上行发射功率参数包括所述高层配置参数 P。 PUSC 。 /)、 和 deltaMCS-Enable , 和物理层配置参数 。 P。 PUSC 。 /)、 ac(j) . deltaMCS-Enable和 是网络设备根据实际通信的情况进行设定并由网络 设备发射给 UE的。 D2D通信的发射带宽^"^ ')为预定义或者从 eNB处调 度得到的, 下行路径损耗估计为 UE通过测量得到的。 在确定上行发射功率所使用的发射带宽为 D2D通信的发射带宽, 而不是釆用 上述公式中的上行通信的发射带宽 Mpus^( ) , 这样计算得出的上行发射功率 可以保证实际发射的 D2D信号到达网络设备的接收功率不会高于第一 UE进 行上行通信的上行信号到达网络设备的接收功率, 可以保证第一 UE的 D2D 信号到达网络设备的接收功率与其他 UE 的上行信号到达网络设备的接收功 率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接 收。 并且, 本实施例中, Ρ 为 UE通过测量得到的下行路径损耗估计, 这也 与现有技术中进行 D2D通信的发射功率确定时釆用 D2D通信的路径损耗估计 不同, 进而可以降低 D2D通信对上行通信的影响。
需要着重说明的是, 本发明实施例中 D2D通信的第一 UE依据上行发射 功率参数和上行发射功率确定机制确定上行发射功率时, 所用的发射带宽 pusc¾c ( 为预定义或者从 eNB处调度得到的 D2D通信的发射带宽,不同于现
UE通过测量得到的下行路径损耗估计,后文 D2D通信的第一 UE在计算上行 发射功率时也都是依据 D2D通信的发射带宽、下行路径损耗估计进行计算的。
进一步需要说明的是,本发明的目的是降低 D2D通信对上行通信的影响, 当第一 UE依据下行路径损耗估计和上行发射功率参数确定的 D2D通信的发 射功率大于 D2D通信的最发发射功率时,选择取值更小的 D2D通信的最大发 射功率, 避免对其他 UE 上行信号的带内泄漏, 影响进一步降低, 而且釆用 D2D通信的最大发射功率进行 D2D数据的发送, 可以保证 D2D通信的正常 进行, 节省 UE的发射功率。
可选地, 本发明实施例中可将确定的上行发射功率直接作为 D2D通信的 发射功率, 也可将上行发射功率进行量化后确定 D2D通信的发射功率。 本发 明实施例中优选将上行发射功率进行量化的方式, 本发明实施例中将上行发 射功率进行量化并确定 D2D通信的发射功率可釆用如下方式:
确定上行发射功率所属的功率等级, 当确定了上行发射功率所属的功率 等级后, 可根据功率等级与 D2D通信的发射功率之间的对应关系, 确定 D2D 通信的发射功率, 本发明实施例中可将功率等级与 D2D通信的发射功率之间 的对应关系称为第一对应关系。
本发明实施例中可预设第一对应关系, 预设的第一对应关系可如表 3 所
Figure imgf000030_0001
表 3中, Pmm , Pl , 是系统预先定义的划分功率等级的分隔点(或 称为量化点), Pmm > 0 , Pmax最大可以等于 UE的额定发射功率, 具体的取值可 以由网络设备配置或者预定义。 分隔点可以根据经验值进行设定的。 本发明 实施例中假设第一 UE依据上行发射功率参数和上行发射功率确定机制计算 出上行发射功率为 P, 当确定了上行发射功率 p后, 则可确定上行发射功率 p 所属的功率等级, 在某一等级内, D2D通信会釆用统一的发射功率。 例如, 当上行发射功率 P, 满足
Figure imgf000030_0002
时, 则可确定 D2D通信的发射功率为 PN , 第 UE则依据发射功率 发射 D2D数据。 当取值在一定范围时, 尽量使得第 UE D2D通信的发射功率与第一 UE的上行发射功率相当, 可以保证第一 UE的 D2D信号到达网络设备的接收功率与其他 UE的上行信号到达网络设备 的接收功率相当, 能够降低或者避免带内泄漏干扰。 通过量化发射功率, 能 够进一步限制第一 UE的 D2D通信的发射功率的取值,限制了第一 UE的 D2D 信号的覆盖范围, 便于后续补偿覆盖范围。
需要说明的是, 本发明实施例中功率等级的划分可以根据实际情况进行 划分, 例如可以划分数量较多的功率等级, 使得 D2D通信功率调整更精细, 或者可以划分数量较少的功率等级, 比如划分两个等级, 使得 D2D通信的发 射功率更少, 便于 D2D通信的第二 UE的接收处理。 当然本发明实施例中也 可不划分等级, 进行 D2D通信的第一 UE都按照一个较小的功率发射, 该最 小功率是对系统不造成影响的最大功率; 或者 UE在满足网络设备下发的 UE 进行 D2D通信的最大发射功率的上限的情况下调整发射功率。 进一步, 发射功率的大小也可以和调制格式相关, 当同一 UE的 D2D传 输釆用不同的调制格式时, 发射功率也可以不同, 故当 D2D通信的第一 UE 的调制格式可变时, 则第一 UE可以依据第一 UE使用的 D2D通信的调制格 式, 进行 D2D通信发射功率的确定。
具体的, 本发明实施例中第一 UE可依据第一 UE的上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 按照上行 发射功率确定机制确定上行发射功率, 并依据确定的上行发射功率确定 D2D 通信的发射功率。
本发明实施例中可以将确定的上行发射功率直接作为 D2D通信的发射功 率, 也可对上行发射功率进行量化后确定 D2D通信的发射功率。 下的功率等级与 D2D通信的发射功率之间的对应关系, 如表 4所示:
Figure imgf000031_0001
表 4 本发明实施例中按照表 4 所示的对应关系确定 D2D通信的发射功率之 前, 进行 D2D通信的第一 UE需要依据网络设备下发的上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 按照上行 发射功率确定机制确定上行发射功率, 以及所述上行发射功率在对应的 D2D 通信的调制格式下所属的功率等级。
本发明实施例中第一 UE可依据 D2D通信的发射带宽、 D2D通信的调制 格式、 下行路径损耗估计和网络设备发射的上行发射功率参数, 确定上行发 射功率。
可选地, 第一 UE可依据网络设备发射的 deltaMCS-Enabled确定发射功 率是否与调制格式相关, 当 deltaMCS-Enabled未激活时, 表明发射功率与调 制格式无关, 则进行上行发射功率确定时, 可以不考虑调制格式; 当 deltaMCS-Enabled激活时,表明发射功率与调制格式相关, 此时第一 UE进行 上行发射功率确定时,可结合上行发射功率参数、 D2D通信的发射带宽、 D2D 通信的调制格式和下行路径损耗估计, 确定上行发射功率, 假设本发明实施 例中确定 D2D通信的调制格式为 QPSK, 此时确定的上行发射功率为 pQpsK , 且该 PQPSK满足^* - QPSK < QPSK < Pi-QPSK , 按照表 4所示的各调制格式下的功率等 级、 以及各调制格式下的功率等级与 D2D通信的发射功率之间的对应关系, 可知 Pmm-QPSK < PQPSK < P1-QPSK等级内对应的 D2D通信的发射功率为 Pm-QPSK , 则此 时确定 D2D通信的发射功率为 Pm- QpsK,第一 UE依据发射功率 Pm- QpsK发射 D2D 数据。
不同的调制格式对应不同的上行发射功率, 因为当调制格式不同时, 上 行发射功率也随之釆用不同的量化值, 适配于各个调制格式。 本发明实施例 上述进行 D2D通信的发射功率的确定方式, 使得在某一调制格式下, D2D通 信的发射功率的取值在一定范围时, 尽量使得第一 UE的 D2D通信的发射功 率与第一 UE进行上行通信的上行发射功率相当, 可以保证第一 UE的 D2D 信号到达网络设备的接收功率与其他 UE 的上行信号到达网络设备的接收功 率相当, 降低或者避免了带内泄漏干扰, 能够保证 D2D通信对网络上行通信 的影响降到最小。 通过量化发射功率, 通过进一步限制 UE的 D2D通信的发 射功率的取值, 限制 UE的 D2D信号的覆盖范围, 便于后续补偿覆盖范围。 进一步的, 本发明实施例中第一 UE进行 D2D通信发射功率确定时, 部分釆 用了上行功率确定机制和参数, 不必为 D2D通信额外增加功率控制的参数, 同时避免通知多套参数 (上行发射功率参数和 D2D发射功率参数 )的复杂度, 节省了单独通知 D2D通信的功率控制信令开销。
第二种方式
S102b: 第一 UE获取功率偏置量并接收网络设备发射的上行发射功率参 数, 第一 UE依据网络设备发射的上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计以及获取的功率偏置量, 确定 D2D通信的发射功率。
具体的,本发明实施例中网络设备可釆用广播或者多播的方式向 UE发射 功率偏置量以及上行发射功率参数,其中,网络设备发射的功率偏置量是 D2D 通信的发射功率相对上行发射功率的一个功率偏置量, 可以釆用通知高层配 置参数, 或者物理层配置参数, 或者高层配置参数和物理层配置参数结合的 方式。 例如, 高层配置参数通知一个第一偏置量, 而物理层配置参数通知第 二偏置量, 第一 UE通过第一偏置量和第二偏置量获得功率偏置量; 或者只通 知第一偏置量或者第二偏置量的方式。 本发明实施例中功率偏置量也可预定 义。 本发明实施例中可假设该功率偏置量为 σ , 其中, σ可以是正数, 负数 或零。第一 UE可依据网络设备发射的上行发射功率参数,确定上行发射功率, 具体的确定过程可参阅第一种方式中涉及的确定上行发射功率的确定过程, 本发明实施例在此不再赘述。
本发明实施例中假设根据上行发射功率参数确定的上行发射功率为 ρ,则 D2D通信的发射功率可以表示为 Ρ+ σ , D2D通信的发射功率的确定过程较为 简单。 当然, 本发明实施例也可以是定义较为复杂的非线性公式来确定 D2D 通信的发射功率。
可选的, 本发明实施例中当上行发射功率参数的高层配置参数 deltaMCS-Enabled激活时, 第一 UE依据网络设备发射的上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及获取的 功率偏置量, 确定 D2D通信的发射功率。
本发明实施例以上进行 D2D通信的发射功率的确定过程中, D2D通信的 第一 UE根据下行路径损耗估计和接收到的上行发射功率参数,确定进行 D2D 通信的发射功率, 即相对现有技术中 D2D通信的第一 UE以最大发射功率发 射 D2D数据,本发明实施例 D2D通信的发射功率是釆用下行路径损耗估计进 行确定的,使得 D2D通信的第一 UE的 D2D通信信号经历信道的衰落后到达 网络设备的接收功率不会高于该第一 UE进行上行通信的上行信号到达网络 设备的接收功率,可以保证 D2D通信的第一 UE的 D2D通信信号到达网络设 备的接收功率与其他 UE的上行信号到达网络设备的接收功率相当,能够降低 或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收,进而可以降低 D2D通信对上行通信的影响。
第三种方式
S102c: 第一 UE依据网络设备发射的上行发射功率参数, 按照预设对应 关系确定 D2D发射功率参数, 依据确定的 D2D发射功率参数、 D2D通信的 发射带宽和下行路径损耗估计, 确定 D2D通信的发射功率。
具体的, 本发明实施例中第一 UE可以根据实际进行的是 D2D通信, 还 是与网络设备的传统通信, 可对网络设备下发的上行发射功率参数釆用不同 的解读方式,故本发明实施例中第一 UE在进行 D2D通信的发射功率确定时, 可将网络设备发射的上行发射功率参数,解读为 D2D通信所需的 D2D发射功 率参数, 然后按照上行发射功率的算法, 计算得到 D2D通信的发射功率。
本发明实施例以解读 TPC为例进行说明,现有技术中对 TPC解读后得到 表 1和表 2所示的 USCH 直, 本发明实施例中可按照预设的对应关系将相同 的 TPC依据是进行上行通信还是 D2D通信解读为不同的值, 该预设对应关 系是指具体将 TPC解读为 D2D通信中的何种 USCH 直是预先设定好的,例如 本发明实施例中可将 TPC解读为表 5和表 6中所示的 D2D累积值 ^^¾=或 D2D绝对值 ^PUSCH^。
Figure imgf000035_0002
Figure imgf000035_0001
Figure imgf000035_0003
表 6
具体的,本发明实施例中表 5和表 6是在表 1和表 2的基础上添加了 D2D 累积值 ^USCH^和 D2D绝对值 ^USCH^两列 , 即本发明实施例中表 5和表 6是将 同一 TPC的取值或状态,对于上行通信和 D2D通信,分别解读为不同的 USCHC 值。
需要说明的是, 本发明实施例以上仅以 TPC为例进行说明。对于 D2D通 信的发射功率确定时, 类似的, 其他上行发射功率参数如 ^-PUSCH^ W , a人 都可以釆用与上行通信相同的参数, 但是将该相同的参数, 对于上行通信和 D2D通信对应不同的取值,对于将上行发射功率参数解读为 D2D发射功率参 数的具体值可以是预先设置的。
可选的, 本发明实施例中当上行发射功率参数的高层配置参数 deltaMCS-Enabled激活时, 第一 UE依据网络设备发射的上行发射功率参数, 按照预设的对应关系确定 D2D发射功率参数,并依据确定的 D2D发射功率参 数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 按照 上行发射功率确定机制计算得到 D2D通信的发射功率。 率确定机制,计算得到 D2D通信的发射功率后,也可对得到的 D2D通信的发 射功率进行量化, 即确定 D2D通信的发射功率所属的功率等级, 在某一等级 内, D2D通信釆用统一的发射功率, 具体的实现方式可参照第一种实现方式 中对上行发射功率进行量化的过程, 在此不再赘述。
本发明实施例中可以对上行发射功率参数釆用不同的解读方式, 不必为 D2D通信额外增加功率控制的参数, 不增加额外的功率控制信令开销, 避免 通知多套参数(上行发射功率参数和 D2D发射功率参数) 的复杂度, 节省了 单独通知 D2D通信的功率控制信令开销。
本发明实施例中可釆用上述三种方式中的任一种方式进行上行反射功率 的确定, 第一 UE进行 D2D通信的具体实现过程可如图 7B和图 7C所示。
可选的, 本发明实施例中 D2D通信的发射功率是依据上行发射功率参数 和下行路径损耗估计进行确定的, 故第一 UE的 D2D通信的发射功率可由网 络设备与第一 UE之间上行通信的上行功率确定机制进行确定 ,只是在确定上 行发射功率所使用的发射带宽为 D2D通信的发射带宽, P 为第一 UE通过测 量得到的下行路径损耗估计,故参与不同 D2D通信的第一 UE的 D2D通信的 发射功率可能会各不相同(由第一 UE与网络设备的链路状态决定, 比如网络 设备与 D2D通信的第一 UE的距离 ), 故多个进行 D2D通信的第一 UE的覆 盖范围由于 D2D通信的发射功率的不同而不同, 本发明实施例中为达到统一 的接收性能, 比如进行不同 D2D通信的第一 UE的覆盖范围相同, 可在 D2D 通信的第一 UE确定了 D2D通信的发射功率后, 确定传输次数或重传次数, 即本发明实施例中可增加低发射功率的 D2D数据的传输次数或重传次数, 在 时间域上增加 D2D数据的传输机会,使得不同 D2D通信的发射功率的各 D2D 通信的第一 UE具有统一的接收性能指标, 保证 D2D通信的正常进行。 具体的, 本发明实施例中第一 UE根据上行发射功率确定 D2D通信的发 射功率, 并确定重传次数的实现过程可如图 7D所示, 包括:
S201 : 第一 UE根据上行发射功率参数和下行路径损耗估计确定 D2D通 信的发射功率。
第一 UE确定 D2D通信的发射功率的具体实现过程可参阅上述实施例中 D2D通信的发射功率的确定方式, 在此不再赘述。
S202: 根据 D2D通信的发射功率, 确定传输次数或重传次数。
本发明实施例中可预设 D2D通信的发射功率和重传次数的对应关系, 或 者预设 D2D通信的发射功率和重传次数的对应关系,本发明实施例中将 D2D 通信的发射功率和重传次数的对应关系, 或者 D2D通信的发射功率和重传次 数的对应关系称为第二对应关系。 第一 UE根据 D2D通信的发射功率确定传 输次数或重传次数时, 可根据第二对应关系, 确定传输次数或重传次数。
具体的, 本发明实施例中可预先设置第二对应关系, 在发射功率与调制 格式无关时, 可设置如表 7 所示的第二对应关系, 在发射功率与调制格式有 关时, 则可设置如表 8所示的第二对应关系, 具体的表现形式可如表 7和表 8 所示:
Figure imgf000037_0001
表 7
Figure imgf000037_0002
p
A M-16QAM M-16QAM
p
A N-16QAM N -16QAM
16QAM
p K -16QAM
p Max-16QAM
p
M-64QAM M-64QAM
p
N-64QAM N -64QAM
64QAM
p
1 K-64QAM K -64QAM
p
max-64QAM Max-64QAM
表 8
具体的 , 进行 D2D通信时 , 本发明实施例中可以结合表 3和表 7 , 表 4 和表 8, 预设表 9或表 10中所示的上行发射功率、 D2D通信的发射功率和传 输次数之间的对应关系, 或者上行发射功率、 D2D通信的发射功率和重传次 数之间的对应关系:
Figure imgf000038_0001
表 9
Figure imgf000038_0002
Figure imgf000039_0001
当然, 本发明实施例中在具体执行时, 也可结合表 9和表 10, 预设如表 11所示的上行发射功率、 D2D通信的发射功率和传输次数之间的对应关系, 或者预设上行发射功率、 D2D通信的发射功率和重传次数之间的对应关系:
Figure imgf000039_0002
p i max-64QAM
P > p max-QPSK Max-QPSK
― ^max-QPSK
Pl6QAM〉 p p Max -16QAM Max
― ^max-16QAM
P64QAM〉 Pmax-64QAM p i max-64QAM Max -64QAM
表 11
具体的, 本发明实施例中若不对发射功率量化并划分等级, 则进行 D2D 通信的第一 UE釆用相同的 D2D通信的发射功率, 并且按照预设的第二对应 关系, 进行 D2D数据发射。 如果对上行发射功率划分等级, 则第一 UE釆用 不同的 D2D通信的发射功率, 则此时可按照表 7或表 8 中的对应关系确定 D2D通信的发射功率。本发明实施例中若 D2D通信的发射功率的确定过程是 独立于调制格式的, 则可依据表 7中的对应关系, 确定传输次数或重传次数, 若 D2D通信的发射功率的确定过程是依据调制格式的, 则可依据表 8中的对 应关系, 确定传输次数或重传次数。
S203: 根据 S202确定的传输次数或重传次数, 以及 D2D通信的发射功 率发射 D2D数据。
本发明实施例中可增加低发射功率的 D2D数据的传输次数或重传次数, 在时间域上增加 D2D数据的传输机会, 使得第一 UE具有统一的接收性能指 标。
可选的, 本发明实施例中第一 UE按照确定的传输次数以及 D2D通信的 发射功率发射 D2D数据,或者按照确定的重传次数以及 D2D通信的发射功率 发射 D2D数据时,为使第二 UE能够准确的对接收到的 D2D数据进行合并处 理,本发明实施例中第一 UE可发射传输次数信息或重传次数信息,具体的实 现过程如图 7E所示, 图 7E在图 7D的基础上还包括:
S204: 发射传输次数信息或重传次数信息。
具体的, 调度信令( scheduling assignment, SA ) 由 D2D通信的第一 UE 发射给 D2D通信的第二 UE的对于后续 D2D数据的资源等信息的指示,可以 是动态或者半静态调度,故本发明实施例中第一 UE可在 SA中携带传输次数 信息或重传次数信息, 实现传输次数信息或重传次数信息的发射。
需要说明的是,本发明实施例中 S204可以在 S203之后执行,也可在 S203 之前执行, 本发明实施例不做限定。
实施例七
进行 D2D通信的第一 UE发射 D2D数据时釆用的 D2D通信的发射功率 可能不同, 故可能造成第一 UE的覆盖范围不同, 进而使得第一 UE发射的数 据的接收性能可能不同, 比如 D2D通信的发射功率高的第一 UE可以覆盖更 大的范围, 即可能被更多的潜在 D2D通信的第二 UE正确接收, 而 D2D通信 的发射功率低的第一 UE覆盖相对小的范围,即可能导致被相对少的潜在 D2D 通信的第二 UE正确接收, 而 D2D通信的目标通常是 D2D通信的第一 UE具 有相同的覆盖范围。 本发明实施例中为了达到统一的接收性能, 可以增加低 发射功率的第一 UE进行数据传输的传输次数或重传次数,在时间域上增加传 输机会, 使得经过多次传输后累积足够的能量, 虽然发射功率不同, 但是能 达到相同的接收性能。
基于上述实施例一和实施例三提供的通信设备, 本发明实施例七提供一 种通信方法, 图 8 所示为本发明实施例提供的通信方法实现流程图, 本发明 实施例中以实现图 8所示的通信方法的执行主体为第一 UE为例进行说明 ,如 图 8所示, 该方法包括:
S301 : 进行 D2D通信的第一 UE确定 D2D通信的传输次数信息或重传 次数信息。
S302:进行 D2D通信的第一 UE根据 S301确定的传输次数信息或重传次 数信息发射 D2D数据, 并发射 S301确定的传输次数信息或重传次数信息。
本发明实施例中, D2D通信的第一 UE确定 D2D通信的传输次数信息或 重传次数信息, 根据确定的传输次数信息或重传次数信息发射 D2D数据, 能 够确保 D2D通信的正常进行。
较佳的,本发明实施例中进行 D2D通信的第一 UE可根据 D2D通信的发 射功率确定传输次数信息或重传次数信息, 然后根据确定的传输次数或重传 次数, 以及 D2D通信的发射功率发射 D2D数据。
当然本发明实施例中若根据 D2D通信的发射功率确定传输次数信息或重 传次数信息, 则在执行 S301之前, 进行 D2D通信的第一 UE需要确定 D2D 通信的发射功率, 较佳的, 本发明实施例中进行 D2D通信的第一 UE可根据 上行发射功率参数, 确定 D2D通信的发射功率。
具体的, 本发明实施例中进行 D2D通信的第一 UE可根据上行发射功率 参数, 确定 D2D通信的发射功率, 可釆用实施例六中 D2D通信的第一 UE确 定 D2D通信的发射功率, 例如:
A: 第一 UE依据上行发射功率参数、 D2D通信的发射带宽和下行路径损 耗估计,确定上行发射功率,并依据上行发射功率确定 D2D通信的发射功率; 或者第一 UE依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调 制格式和下行路径损耗估计, 确定上行发射功率, 并依据上行发射功率确定 D2D通信的发射功率。 行发射功率进行量化, 确定上行发射功率所属的功率等级, 根据预设的功率 等级与 D2D通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
B: 第一 UE依据网络设备发射的上行发射功率参数、 D2D通信的发射带 宽、 下行路径损耗估计以及网络设备发射的功率偏置量, 确定 D2D通信的发 射功率; 或者第一 UE依据网络设备发射的上行发射功率参数、 D2D通信的 发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及网络设备发射的功 率偏置量, 确定 D2D通信的发射功率。
C: 第一 UE依据网络设备发射的上行发射功率参数, 按照预设对应关系 确定 D2D发射功率参数, 依据确定的 D2D发射功率参数、 D2D通信的发射 带宽和下行路径损耗估计, 按照上行发射功率确定机制计算得到 D2D通信的 发射功率; 或者第一 UE依据网络设备发射的上行发射功率参数,按照预设的 对应关系确定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D 通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 按照上行发射 功率确定机制计算得到 D2D通信的发射功率。
本发明实施例中 D2D通信的第一 UE依据上行发射功率参数确定 D2D通 信的发射功率的过程, 可参阅实施例六中的相关描述, 在此不再赘述。
较佳的, 本发明实施例中可预设 D2D通信的发射功率、 传输次数和重传 次数的对应关系,在确定了 D2D通信的发射功率后,可根据预设的 D2D通信 的发射功率、 传输次数和重传次数的对应关系, 确定传输次数或重传次数, 其中 D2D通信的发射功率、 传输次数和重传次数的对应关系, 可参阅实施例 六中的相关描述, 在此不再赘述。
发射功率的大小也可以是和调制格式相关,当网络设备对同一 UE的 D2D 传输, 调度不同的调制格式时, 发射功率也可以不同, 故当 D2D通信的第一 UE的调制格式可变时,则第一 UE可以依据 D2D通信使用的调制格式,进行 D2D通信发射功率的确定。 较佳的, 本发明实施例中第一 UE可依据高层配 置参数 deltaMCS-Enabled, 上行发射功率参数和 D2D通信的调制格式, 确定 上行发射功率, 依据上行发射功率, 确定上行发射功率所属的各调制格式下 的功率等级, 进而使得 D2D通信的第一 UE可依据上行发射功率、 D2D通信 的调制格式和预设的各调制格式下的功率等级与 D2D通信的发射功率之间的 对应关系, 确定 D2D通信的发射功率, 本发明实施例中预先定义的各调制格 式下的功率等级, 以及各调制格式下的功率等级与 D2D通信的发射功率之间 的对应关系, 可进一步参阅实施例六中的相关描述, 在此不再赘述。
可选的, 本发明实施例中第一 UE可在调度信令 ( scheduling assignment, SA ) 中携带传输次数信息或重传次数信息, 实现传输次数信息或重传次数信 息的发射。
本发明实施例七中涉及的第一 UE进行 D2D通信的方法执行过程, 与实 施例六中涉及的通信执行方法类似, 对于本发明实施例中描述不够详尽的地 方, 可参阅实施例六中的相关描述, 在此不再赘述。
本发明实施例提供的通信方法, 第一 UE确定 D2D通信的传输次数信息或 重传次数信息, 根据确定的传输次数信息或重传次数信息发射 D2D数据, 能 够确保 D2D通信的正常进行。 进一步的, 第一 UE根据下行路径损耗估计和接 收到的上行发射功率参数, 确定进行 D2D通信的发射功率, 即相对现有技术 中 D2D通信的第一 UE以最大发射功率发射 D2D数据, 本发明实施例 D2D通信 的发射功率是釆用下行路径损耗估计进行确定的, 使得 D2D通信的第一 UE的 D2D通信信号经历信道的衰落后到达网络设备的接收功率不会高于该第一 UE 进行上行通信的上行信号到达网络设备的接收功率, 可以保证 D2D通信的第 一 UE的 D2D通信信号到达网络设备的接收功率与其他 UE的上行信号到达网 络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE 的上行信号的接收, 进而可以降低 D2D通信对上行通信的影响。
实施例八
本发明实施例八提供一种通信方法, 图 9所示为本发明实施例提供的通 信方法实现流程图, 本发明实施例中以实现图 9所示的通信方法的执行主体 为第二 UE为例进行说明, 如图 9所示, 该方法包括:
S401:进行 D2D通信的第二 UE获取 D2D通信的传输次数信息或重传次 数信息。
S402: 进行 D2D通信的第二 UE根据获取的传输次数信息或重传次数信 息, 接收数据。
具体的, 若 D2D通信的第一 UE釆用实施例六或实施例七中涉及的通信 方法进行 D2D通信数据的发射, 本发明实施例中进行 D2D通信的第二 UE, 则可根据获取的传输次数信息或重传次数信息接收数据, 以保证能够准确的 接收数据。
可选的, 若 D2D通信的第一 UE在 SA通知中携带传输次数信息或重传 次数信息, 则第二 UE可获取调度信令(scheduling assignment, SA )通知, 并从 SA通知中得到传输次数信息或重传次数信息。
本发明实施例提供的通信方法, 第二 UE可根据获取的传输次数信息或重 传次数信息接收数据, 以保证能够准确的接收数据, 并能够保证 D2D通信的 正常进行。
实施例九
基于上述实施例二和实施例四提供的通信设备, 本发明实施例九提供一 种通信方法, 图 10所示为本发明实施例提供的通信方法实现流程图, 本发明 实施例中以实现图 10所示的通信方法的执行主体为网络设备为例进行说明, 如图 10所示, 该方法包括:
S501 : 网络设备确定上行发射功率参数。
S502: 网络设备下发确定的上行发射功率参数, 以使第一 UE根据所述上 行发射功率参数确定 D2D通信的发射功率。
具体的, 本发明实施例中网络设备可以根据第一 UE确定 D2D通信的发 射功率的方式下发不同的上行发射功率参数, 例如网络设备可下发相关的上 行发射功率参数, 使第一 UE可依据上行发射功率参数、 D2D通信的发射带 宽和下行路径损耗估计, 或者依据上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计确定上行发射功率, 并依据确定的 上行发射功率确定 D2D通信的发射功率; 也可使第一 UE依据网络设备发射 的上行发射功率参数, 按照预设对应关系确定 D2D发射功率参数, 将与上行 通信釆用的相同的上行发射功率参数解读为不同的功率控制调整值, 作为 D2D发射功率参数, 然后依据确定的 D2D发射功率参数、 D2D通信的发射带 宽和下行路径损耗估计, 或者依据确定的 D2D发射功率参数、 D2D通信的发 射带宽、 D2D通信的调制格式和下行路径损耗估计确定上行发射功率, 并确 定 D2D通信的发射功率。 当然网络设备还可下发上行发射功率参数和功率偏 置量,使第一 UE依据上行发射功率参数确定上行发射功率, 然后再依据功率 偏置量确定 D2D通信的发射功率。 该 D2D通信的发射带宽即是第一 UE 用于进行上行发射功率确定时所用的 D2D通信的发射带宽。 该 D2D通信的调制格式即是第一 UE 用于进行上行发射功率确定时所用的 D2D通信的调制格式。
可选的, 网络设备可釆用广播方式、 无线资源控制协议 RRC方式或者物 理层信令控制方式或者上述几种方式的组合方式, 下发上行发射功率参数、 功率偏置量、 D2D通信的发射带宽和 D2D通信的调制格式等。
比如, 上行功率参数中的高层配置参数部分由广播方式或者无线资源控 制协议 RRC方式下发, 而功率控制域 TPC由物理层信令下发。
网络设备发射的功率偏置量是 D2D通信的发射功率相对上行发射功率的 一个功率偏置量, 可以釆用高层配置参数, 或者物理层配置参数, 或者高层 配置参数和物理层配置参数结合的方式。 例如, 高层配置参数通知一个第一 偏置量, 而物理层配置参数通知一个第二偏置量, 第一 UE可结合第一偏置量 和第二偏置量获得功率偏置量; 当然也可只通知第一偏置量或者第二偏置量。
需要说明的是, 本发明实施例中网络设备既可以是 LTE系统中的演进型 基站 ( eNB ) , 也可以是通用 移动通信系 统 ( Universal Mobile Telecommunications System, UMTS ) 中的基站 (NB ), 还可以是其他与 UE 进行通信并为 UE进行资源调度的网络设备。
本发明实施例提供的通信方法, 网络设备向 D2D通信的第一 UE, 下发 确定的上行发射功率参数, D2D通信的第一 UE根据下行路径损耗估计和接 收到的上行发射功率参数, 确定进行 D2D通信的发射功率, 即相对现有技术 中 D2D通信的第一 UE以最大发射功率发射 D2D数据, 本发明实施例 D2D 通信的发射功率是釆用下行路径损耗估计进行确定的, 使得 D2D通信的第一 UE的 D2D信号经历信道的衰落后到达网络设备的接收功率不会高于该第一 UE进行上行通信的上行信号到达网络设备的接收功率, 可以保证 D2D通信 的第一 UE的 D2D信号到达网络设备的接收功率与其他 UE的上行信号到达 网络设备的接收功率相当, 能够降低或者避免带内泄漏干扰, 不会影响其他 UE的上行信号的接收, 进而可以降低 D2D通信对上行通信的影响。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了 基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 脱离本发明实施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变 型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些 改动和变型在内。

Claims

权 利 要 求
1、 一种用户终端, 其特征在于, 该用户终端包括: 接收单元、 确定单元 和发射单元, 其中,
所述确定单元, 用于获取上行发射功率参数, 并根据下行路径损耗估计 和所述接收单元接收的所述上行发射功率参数, 确定 D2D通信的发射功率; 所述发射单元, 用于根据所述确定单元确定的所述 D2D通信的发射功率 发射 D2D数据。
2、 如权利要求 1所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式确定 D2D通信的发射功率:
依据所述上行发射功率参数、 D2D通信的发射带宽和所述下行路径损耗 估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功 率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式和下行路径损耗估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功率。
3、 如权利要求 2所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式依据所述上行发射功率确定 D2D通信的发射功率: 将所述上行发 射功率, 确定为所述 D2D通信的发射功率。
4、 如权利要求 2所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式依据所述上行发射功率确定 D2D通信的发射功率:
确定所述上行发射功率所属的功率等级; 以及
根据第一对应关系, 确定所述 D2D通信的发射功率, 其中, 所述第一对 应关系为功率等级与 D2D通信的发射功率之间的对应关系。
5、 如权利要求 4所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式确定所述上行发射功率所属的功率等级: 确定 D2D通信的调制格 式,并确定上行发射功率在对应所述 D2D通信的调制格式下所属的功率等级; 以及
所述确定单元具体用于按如下方式确定所述 D2D通信的发射功率: 依据 所述上行发射功率、 所述 D2D通信的调制格式、 和各调制格式下的功率等级 与 D2D通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
6、如权利要求 1所述的用户终端, 其特征在于, 所述确定单元, 还用于: 获取功率偏置量;
所述确定单元具体用于按如下方式确定所述 D2D通信的发射功率: 依据所述上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计 以及所述功率偏置量, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格 式、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通信的发射功率。
7、 如权利要求 1所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式确定所述 D2D通信的发射功率:
依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功 依据确定的 D2D发射功率参数、 D2D通信的发射带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者
依据所述上行发射功率参数, 按照所述上行发射功率参数与 D2D发射功 率参数的对应关系确定所述上行发射功率参数对应的所述 D2D 发射功率参 数, 并依据确定的 D2D发射功率参数、 D2D通信的发射带宽、 D2D通信的调 制格式和下行路径损耗估计, 确定 D2D通信的发射功率。
8、 如权利要求 1-7任一项所述的用户终端, 其特征在于, 所述确定单元, 还用于: 根据所述 D2D通信的发射功率, 确定传输次数或重传次数;
所述发射单元具体用于按如下方式发射 D2D数据: 根据确定的传输次数 和所述 D2D通信的发射功率,发射所述 D2D数据; 或者根据确定的所述重传 次数和所述 D2D通信的发射功率, 发射所述 D2D数据。
9、 如权利要求 8所述的用户终端, 其特征在于, 所述确定单元具体用于 按如下方式确定传输次数或重传次数:
根据第二对应关系,确定传输次数或重传次数,所述第二对应关系为 D2D 通信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与 重传次数之间的对应关系。
10、 如权利要求 8或 9所述的用户终端, 其特征在于, 所述发射单元, 还用于:
发射传输次数信息, 所述传输次数信息用于第二用户终端根据所述传输 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端; 或者
发射重传次数信息, 所述重传次数信息用于第二用户终端根据所述重传 次数信息接收数据, 所述第二用户终端是与所述第一用户终端进行 D2D通信 的终端。
11、 如权利要求 10所述的用户终端, 其特征在于, 所述发射单元具体用 于按如下方式发射传输次数信息或重传次数信息:
在调度信令通知中, 发射传输次数信息或重传次数信息。
12、 一种网络设备, 其特征在于, 该网络设备包括确定单元和下发单元, 其中,
所述确定单元, 用于确定上行发射功率参数; 所述上行发射功率参数用于设备到设备 D2D通信的第一用户终端根据下行路 径损耗和所述上行发射功率参数确定 D2D通信的发射功率。
13、 如权利要求 12所述的网络设备, 其特征在于, 所述确定单元, 还用 于: 确定功率偏置量;
所述下发单元, 还用于: 下发所述功率偏置量;
其中, 所述功率偏置量用于所述第一用户终端根据所述功率偏置量、 所 述下行路径损耗估计和所述上行发射功率参数, 确定所述 D2D通信的发射功 率。
14、 如权利要求 13所述的网络设备, 其特征在于, 所述下发单元具体用 于按如下方式下发所述功率偏置量: 釆用广播方式、 无线资源控制 RRC信令 方式和物理层信令控制方式中的至少一种方式, 下发所述功率偏置量。
15、 如权利要求 12或 13或 14所述的网络设备, 其特征在于, 所述确定 单元, 还用于: 确定 D2D通信的发射带宽;
所述下发单元, 还用于: 下发所述 D2D通信的发射带宽;
其中,所述 D2D通信的发射带宽用于所述第一用户终端根据所述 D2D通 信的发射带宽、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
16、 如权利要求 12-15任一项所述的网络设备, 其特征在于, 所述确定单 元, 还用于: 确定 D2D通信的调制格式;
所述下发单元, 还用于: 下发所述 D2D通信的调制格式;
其中,所述 D2D通信的调制格式用于所述第一用户终端根据所述 D2D通 信的调制格式、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行 发射功率。
17、 一种通信方法, 其特征在于, 包括:
设备到设备 D2D通信的第一用户终端获取上行发射功率参数;
所述第一用户终端根据所述上行发射功率参数和下行路径损耗估计, 确 定 D2D通信的发射功率; 以及
所述第一用户终端根据所述 D2D通信的发射功率发射 D2D数据。
18、 如权利要求 17所述的方法, 其特征在于, 第一用户终端根据所述上 行发射功率参数和所述下行路径损耗估计,确定 D2D通信的发射功率, 包括: 所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽和 所述下行路径损耗估计, 确定上行发射功率, 并依据所述上行发射功率确定 D2D通信的发射功率; 或者
所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式和下行路径损耗估计, 确定上行发射功率, 并依据所述 上行发射功率确定 D2D通信的发射功率。
19、 如权利要求 18所述的方法, 其特征在于, 所述依据所述上行发射功 率确定 D2D通信的发射功率, 包括:
所述第一用户终端将所述上行发射功率, 确定为所述 D2D通信的发射功 率。
20、 如权利要求 18所述的方法, 其特征在于, 所述依据所述上行发射功 率确定 D2D通信的发射功率, 包括:
所述第一用户终端确定所述上行发射功率所属的功率等级; 以及 所述第一用户终端根据第一对应关系, 确定所述 D2D通信的发射功率, 所述第一对应关系为功率等级与 D2D通信的发射功率之间的对应关系。
21、 如权利要求 20所述的方法, 其特征在于, 所述第一用户终端确定所 述上行发射功率所属的功率等级, 包括:
所述第一用户终端确定 D2D通信的调制格式;
所述第一用户终端依据上行发射功率参数、 D2D 通信的发射带宽、 D2D 通信的调制格式和下行路径损耗估计, 确定上行发射功率, 并确定所述上行 发射功率在对应所述 D2D通信的调制格式下所属的功率等级;
所述第一用户终端根据第一对应关系,确定 D2D通信的发射功率, 包括: 所述第一用户终端依据所述上行发射功率、 所述 D2D通信的调制格式、 和各调制格式下的功率等级与 D2D 通信的发射功率之间的对应关系, 确定 D2D通信的发射功率。
22、 如权利要求 17所述的方法, 其特征在于, 该方法还包括:
所述第一用户终端获取功率偏置量;
第一用户终端根据所述上行发射功率参数和所述下行路径损耗估计, 确 定 D2D通信的发射功率, 包括:
所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通信的发射功率; 或者 所述第一用户终端依据所述上行发射功率参数、 D2D通信的发射带宽、 D2D通信的调制格式、 下行路径损耗估计以及所述功率偏置量, 确定 D2D通 信的发射功率。
23、 如权利要求 17所述的方法, 其特征在于, 第一用户终端根据所述上 行发射功率参数和所述下行路径损耗估计,确定 D2D通信的发射功率, 包括: 所述第一用户终端依据所述上行发射功率参数, 按照预设的对应关系确 定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射 带宽和下行路径损耗估计, 确定 D2D通信的发射功率; 或者
所述第一用户终端依据所述上行发射功率参数, 按照预设的对应关系确 定 D2D发射功率参数, 并依据确定的 D2D发射功率参数、 D2D通信的发射 带宽、 D2D通信的调制格式和下行路径损耗估计,确定 D2D通信的发射功率。
24、 如权利要求 17至 23任一项所述的方法, 其特征在于, 所述第一用 户终端确定 D2D通信的发射功率之后, 该方法还包括:
所述第一用户终端根据所述 D2D通信的发射功率, 确定传输次数或重传 次数;
所述第一用户终端根据确定的所述 D2D通信的发射功率发射数据,包括: 所述第一用户终端根据确定的所述传输次数和所述 D2D 通信的发射功 率, 发射 D2D数据; 或者
所述第一用户终端根据确定的所述重传次数和所述 D2D 通信的发射功 率, 发射 D2D数据。
25、 如权利要求 24所述的方法, 其特征在于, 所述第一用户终端根据所 述 D2D通信的发射功率, 确定传输次数或重传次数, 包括:
所述第一用户终端根据第二对应关系, 确定传输次数或重传次数, 所述 第二对应关系为 D2D 通信的发射功率与传输次数之间的对应关系, 或者为 D2D通信的发射功率与重传次数之间的对应关系。
26、 如权利要求 24或 25所述的方法, 其特征在于, 所述第一用户终端 确定传输次数或重传次数之后, 该方法还包括:
所述第一用户终端发射传输次数信息, 所述传输次数信息用于第二用户 终端根据所述传输次数信息接收数据, 所述第二用户终端是与所述第一用户 终端进行 D2D通信的终端; 或者
所述第一用户终端发射重传次数信息, 所述重传次数信息用于第二用户 终端根据所述重传次数信息接收数据, 所述第二用户终端是与所述第一用户 终端进行 D2D通信的终端。
27、 如权利要求 26所述的方法, 其特征在于, 所述第一用户终端发射传 输次数信息或重传次数信息, 包括:
所述第一用户终端在调度信令通知中, 发射传输次数信息或重传次数信 息。
28、 一种通信方法, 其特征在于, 包括:
网络设备确定上行发射功率参数;
网络设备下发所述上行发射功率参数, 所述上行发射功率参数用于设备 到设备 D2D通信的第一用户终端根据下行路径损耗估计和所述上行发射功率 参数确定 D2D通信的发射功率。
29、 如权利要求 28所述的方法, 其特征在于, 该方法还包括:
所述网络设备确定并下发功率偏置量;
所述功率偏置量用于所述第一用户终端根据所述功率偏置量、 所述下行 路径损耗估计和所述上行发射功率参数, 确定 D2D通信的发射功率。
30、 如权利要求 29所述的方法, 其特征在于, 所述网络设备下发功率偏 置量, 包括: 所述网络设备釆用广播方式、 无线资源控制协议 RRC信令方式 和物理层信令控制方式中的至少一种方式, 下发所述功率偏置量。
31、 如权利要求 28-30任一项所述的方法, 其特征在于, 该方法还包括: 所述网络设备确定并下发 D2D通信的发射带宽;
所述 D2D通信的发射带宽用于所述第一用户终端根据所述 D2D通信的发 射带宽、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行发射功 率。
32、 如权利要求 28至 31任一项所述的方法, 其特征在于, 该方法还包 括:
所述网络设备确定并下发 D2D通信的调制格式;
所述 D2D通信的调制格式用于所述第一用户终端根据所述 D2D通信的调 制格式、 所述下行路径损耗估计和所述上行发射功率参数, 确定上行发射功 率。
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