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WO2014179989A1 - Procédé et dispositif pour la prise en charge de communications de dispositif à dispositif (d2d) dans un système de communication sans fil - Google Patents

Procédé et dispositif pour la prise en charge de communications de dispositif à dispositif (d2d) dans un système de communication sans fil Download PDF

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Publication number
WO2014179989A1
WO2014179989A1 PCT/CN2013/075484 CN2013075484W WO2014179989A1 WO 2014179989 A1 WO2014179989 A1 WO 2014179989A1 CN 2013075484 W CN2013075484 W CN 2013075484W WO 2014179989 A1 WO2014179989 A1 WO 2014179989A1
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WIPO (PCT)
Prior art keywords
downlink control
control channel
communication
physical downlink
user equipment
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/CN2013/075484
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English (en)
Chinese (zh)
Inventor
孟艳
郑武
刘铮
蒋琦
倪威
沈钢
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.)
Nokia Shanghai Bell Co Ltd
Original Assignee
Alcatel Lucent Shanghai Bell 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 Alcatel Lucent Shanghai Bell Co Ltd filed Critical Alcatel Lucent Shanghai Bell Co Ltd
Priority to CN201380076035.7A priority Critical patent/CN105144813B/zh
Priority to PCT/CN2013/075484 priority patent/WO2014179989A1/fr
Publication of WO2014179989A1 publication Critical patent/WO2014179989A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • Embodiments of the present invention relate to the field of wireless communications and, more particularly, to a method and apparatus for supporting device-to-device communication in a wireless communication system. Background technique
  • D2D communication is a short-distance service that is different from the conventional cellular communication mode.
  • UEs user equipments
  • UE-eNodeB-UE communication between user equipments
  • a cellular controlled D2D communication system is introduced as a potential short-range technology for LTE-A.
  • 3GPP has launched a new research project to develop standards related to D2D technology for neighboring services.
  • eNB base station eNodeB
  • D2D communication two UEs can directly transmit data to each other in the uplink or downlink, while time-frequency resources are still allocated by the eNB.
  • a method for supporting device-to-device D2D communication in a wireless communication system comprising: receiving a resource request message for D2D communication from a first user equipment; and responding to the resource request a message, sending, to the first user equipment and the second user equipment, a first physical downlink control channel and a second object, respectively A downlink control channel is provided, and signaling for indicating a sender and a receiver of the D2D communication is provided.
  • the transmitting of the first physical downlink control channel and the second physical downlink control channel is performed in the same subframe.
  • the first physical downlink control channel is the same as the second physical downlink control channel.
  • the multiple user equipments in the wireless communication system are divided into one or more groups, and the first user equipment and the second user equipment are in the same group, and The method further includes: transmitting the first physical downlink control channel to all other user equipments in the same group as the first user equipment and the second user equipment.
  • the signaling is provided in one of: downlink control information DCI in the first physical downlink control channel and the second physical downlink control channel, Subframe, frequency, and antenna port.
  • an apparatus for supporting device-to-device D2D communication in a wireless communication system comprising: receiving means for receiving a resource request message for D2D communication from a first user equipment; a first sending device, configured to send, to the first user equipment and the second user equipment, a first physical downlink control channel and a second physical downlink control channel, respectively, in response to the resource request message, and provide Signaling indicating the sender and receiver of the D2D communication.
  • the transmitting of the first physical downlink control channel and the second physical downlink control channel is performed in the same subframe.
  • the first physical downlink control channel is the same as the second physical downlink control channel.
  • the multiple user equipments in the wireless communication system are divided into one or more groups, and the first user equipment and the second user equipment are in the same group, and
  • the device further includes: a second sending device, configured to send the first PDCCH to all other user equipments in the same group as the first user equipment and the second user equipment, and provide Signaling of the sender and receiver of D2D communication.
  • the signaling is provided in one of: downlink control information DCI in the first physical downlink control channel and the second physical downlink control channel, Subframe, frequency, and antenna port.
  • a method for supporting device-to-device D2D communication in a wireless communication system comprising: transmitting a resource request message for D2D communication to a base station; receiving a physical downlink from the base station a control channel, and signaling for indicating a sender and a receiver of the D2D communication; decoding the physical downlink control channel by a corresponding wireless network temporary identifier RNTI; and decoding the physical downlink
  • the information in the control channel and the signaling are performed by the D2D communication with one or more user equipments.
  • the signaling is provided in one of: downlink control information DCI, subframes, frequencies, and antenna ports in the physical downlink control channel.
  • the D2D communication with one or more user equipments includes one of unicast, multicast, and broadcast.
  • an apparatus for supporting device-to-device D2D communication in a wireless communication system including: a transmitting apparatus, configured to send a resource request message for D2D to a base station; Receiving, by the base station, a physical downlink control channel, and signaling for indicating a sender and a receiver of the D2D communication; and decoding means, configured to temporarily decode the physical downlink by using a corresponding wireless network temporary identifier RNTI And a communication device, configured to perform the D2D communication with one or more user equipments based on the decoded information in the physical downlink control channel and the signaling.
  • the signaling is provided in one of: downlink control information DCI, subframes, frequencies, and antenna ports in the physical downlink control channel.
  • the D2D communication with one or more user equipments includes one of unicast, multicast, and broadcast.
  • Figure 1 shows a schematic diagram 100 of D2D communication under a cellular system in a single cell scenario
  • Figure 2 shows a transmission process 200 of cellular communication
  • FIG. 3 illustrates a transmission process 300 for D2D communication in accordance with an embodiment of the present invention
  • FIG. 4 illustrates another transmission process 400 for D2D communication in accordance with an embodiment of the present invention
  • Figure 5 illustrates a block diagram of yet another transmission process 500 for D2D communication in accordance with an embodiment of the present invention
  • FIG. 7 illustrates a block diagram of another apparatus 700 for supporting D2D communication in accordance with an embodiment of the present invention
  • FIG. 8 shows a flow chart of a method for D2D communication according to an embodiment of the present invention.
  • FIG. 9 shows a flow chart of a method for D2D communication according to an embodiment of the present invention.
  • Figure 1 shows an illustration of D2D communication under a cellular system in a single cell scenario, where UE1, UE2 and UE3 are D2D UEs, and UE4 and UE5 are cellular UEs. It should be understood by those skilled in the art that the number of UEs in the cellular system shown in FIG. 1 is schematic, and in actual applications, more or fewer UEs may be included.
  • FIG. 2 illustrates an approximate transmission process 200 for a cellular communication.
  • the UE1 sends a resource requirement (for example, but not limited to a scheduling request and a buffer status report) to the eNB.
  • a resource requirement for example, but not limited to a scheduling request and a buffer status report
  • step S202 the eNB sends PDCCH1 to the UE1 in the (nl)th subframe to indicate scheduling information.
  • step S203 (not shown in FIG. 2), UE1 uses its own C-RNTI to decode DCI (Downlink Control Information) in the PDCCH, and obtains the allocated resource location; S204.
  • the UE1 sends data to the eNB in the frequency resource allocated in the uplink transmission by the (nl+k) (k is a predetermined and k>4) subframes.
  • step S205 the eNB is in the downlink transmission.
  • (n2) subframes transmit PDCCH2 to UE2 and forward the data; finally, in step S206, UE2 decodes the DCI in PDCCH2 using its own C-RNTI, and obtains the allocated resource location. The PDSCH is then decoded in the allocated resource location in the (n2)th subframe.
  • the eNB needs to send to UE1 in the uplink transmission.
  • PDCCH1 and also needs to transmit another PDCCH2 to UE2 in the downlink transmission. That is, two PDCCH resources need to be allocated for each pair of D2D UEs.
  • the eNB In order to be able to use the existing PDCCH identified by the C-RNTI, the eNB will transmit two PDCCHs to the UE1 and the UE2 in the (nl)th subframe. Note that since the time axis of this method is different from the time axis of cellular communication, the eNB needs to inform the D2D transmission direction (for example, if the two user equipments perform D2D transmission, whether the D2D communication is UE1->UE2 or UE2->UE1) Or sender and receiver. In an alternative embodiment of the invention, it is also possible to signal the current UE communication mode, such as D2D communication or cellular communication. Additional signaling is therefore required (eg, by using two reserved bits in the existing DCI or otherwise).
  • the D2D UE will select the corresponding operation according to this indication.
  • several bits can be introduced as follows, for example two bits (bl, B2) to indicate the communication mode and / or communication direction (that is, determine the transmitter and receiver):
  • blb2 00 indicates D2D communication UE1->UE2, that is, UE1 is the sender and UE2 is the receiver;
  • bits are only for the purpose of illustration and are not intended to limit the invention.
  • the signaling for indication may be set in the subframe, frequency, or antenna port in addition to the reserved bits of the DCI.
  • FIG. 3 illustrates a transmission process 300 for D2D communication under Method 1 in accordance with an embodiment of the present invention.
  • UE1 transmits a resource request to the eNB in step S301.
  • the eNB transmits PDCCH1 (identified by the C-RNTI of UE1) to UE1 in the nth subframe and transmits PDCCH2 to UE2 (C of UE2) - RNTI identification);
  • step S303 (not shown in Fig.
  • UE1 decodes the DCI in PDCCH1 using its own C-RNTI, and obtains the allocated resource location and the indication bit allocated in the DCI.
  • UE2 uses its own C-RNTI to decode the DCI in PDCCH2, and obtains the allocated resource location and the indication bit in the DCI (assuming that the reserved bits in the DCI are used to signal the communication direction, but as mentioned above, this is not a Limitations of the invention).
  • the advantage of using this method is that it reuses the PDCCH in cellular communications.
  • the present invention introduces a paired RNTI (paired-RNTI) to identify a corresponding paired PDCCH (paired-PDCCH). Still sending UE1 to UE2 to send data This 'It's shape is an example. Under this method, the eNB only needs to send one PDCCH for each pair of D2D UEs (for example, UE1-UE2 pairs).
  • the eNB still needs to inform the D2D UE of the transmission direction (eg, UE 1 -> UE2 or UE2-> UE1), thus requiring additional signaling (eg, by using one of the reserved bits in the existing DCI or otherwise) To give instructions.
  • the D2D UE will select the corresponding operation according to this indication.
  • only one bit (bl) may be introduced to indicate the direction of communication (determining the transmitter and receiver), for example:
  • bl 0 indicates D2D communication UE1->UE2, that is, UE1 is the sender and UE2 is the receiver;
  • (2) bl 1 indicates D2D communication UE2-> UE1, that is, UE2 is the sender and UE1 is the receiver.
  • bits are only for the purpose of illustration and are in no way intended to limit the invention.
  • the signaling for indication may be set in the subframe, the frequency, or the antenna port in other ways, in addition to being set by the reserved bits of the DCI.
  • step S401 the UE1 sends a resource request to the eNB; in step S402, the eNB transmits a pair of PDCCHs (which will be identified by the paired RNTIs) in the (nl)th subframe, that is, the eNB is in the (nl)th subframe. Transmitting the same PDCCH to UE1 and UE2; in step S403 (not shown in FIG.
  • the data transmitted from UE1 is received at the allocated resource location.
  • the advantage of this method is that it uses only one PDCCH for a pair of UEs, reducing the overhead of the PDCCH. 3.
  • D2D scenarios involve direct communication within a group of devices, such as mobile multiplayer games, file sharing, mobile advertising, streaming services, and collaborative downloads.
  • multiple UEs in a wireless communication system e.g., depending on service type, etc.
  • the group RNTI is similarly introduced to identify the corresponding PDCCH.
  • the present invention gives an example as follows: Three D2D UEs are employed in one group as an example. Thus, there are nine possible communication modes, so for example blb2b3b4 is required to make the following indication:
  • blb2b3b4 0101 indicating unicast communication UE3->UE2;
  • Mb2b3b4 0110 indicating multicast communication UE1-> UE2, UE3;
  • Mb2b3b4 1000 indicates multicast communication UE3-> UE1, UE2.
  • bits are only for the purpose of illustration and are in no way intended to limit the invention.
  • the foregoing example is still used, and the item numbers (1) - (9) indicate the subframe number in the radio frame.
  • the item numbers (1) - (9) indicate the subframe number in the radio frame.
  • only UE1 and UE2 in the group may receive the PDCCH from the eNB in subframe 1, and if they successfully detect the scheduling information, execute in the indicated subframe in the allocated resource.
  • Corresponding D2D communication, and other UEs in the group remain in sleep mode, thereby reducing power consumption.
  • the use of implied indications in the frequency/antenna port is similar.
  • FIG. 5 illustrates a transmission process 500 for D2D communication under method 3 in accordance with an embodiment of the present invention.
  • UE1 sends a resource request to the eNB; in step S502, the eNB transmits one PDCCH in the (nl)th subframe, the PDCCH is identified by the group RNTI; in step S503 (not shown in FIG. 5), three D2D UEs Each PDCCH is decoded using a group RNTI, and each D2D UE obtains its resource allocation location and an explicit indicator bit, or an implicit subframe/frequency/antenna binding.
  • Receiving data on, UE3 will know that the decoded PDCCH is not for itself, so no operation is performed in the (nl+k)th subframe, where k > 4.
  • the advantages of adopting this method are as follows: (1) The UE can directly communicate with any UE in the same group by using one group RNTI, and does not require an additional paired RNTI when the communication pair is changed; (2) is particularly suitable for multiple Broadcast/broadcast communication.
  • Figures 8 and 9 respectively show flow diagrams of methods 800 and 900 for supporting D2D communication, corresponding to methods 1-3 previously described with reference to Figures 3-5.
  • step S802 a resource request message for D2D communication is received from the first user equipment (for example, corresponding to steps S301, S401, and S501 in FIG. 3 to FIG. 5).
  • the method 800 then proceeds to step S804, in response to the resource request message, respectively transmitting a first physical downlink control channel and a second physical downlink control channel to the first user equipment and the second user equipment, and Signaling for indicating the sender and receiver of the D2D communication (e.g., corresponding to steps S302, S402, and S502 in Figures 3-5).
  • the transmission of the first physical downlink control channel and the second physical downlink control channel is performed in the same subframe.
  • the first physical downlink control channel is the same as the second physical downlink control channel (e.g., corresponding to steps S402, S502 in Figures 4 and 5).
  • a plurality of user equipments in the wireless communication system are divided into one or more groups, and the first user equipment and the second user equipment are in the same group.
  • the method further includes: transmitting the first physical downlink control channel to all other user equipments in the same group as the first user equipment and the second user equipment (eg, corresponding to FIG. 5 Step S502).
  • the signaling is provided in one of: downlink control information in the first physical downlink control channel and the second physical downlink control channel DCI, subframe, frequency, and antenna port.
  • method 800 ends.
  • step S902 a resource request message for D2D communication is transmitted to the base station (e.g., corresponding to steps S301, S401, and S501 in Figs. 3 to 5).
  • the method 900 then proceeds to step S904, receiving a physical downlink control channel from the base station, and signaling for indicating the sender and the receiver of the D2D communication (eg, corresponding to the steps in FIGS. 3-5).
  • step S906 the method 900 proceeds to step S906 to decode the physical downlink control channel by the corresponding radio network temporary identity RNTI.
  • step S908 to perform the D2D communication with one or more user equipments based on the decoded information in the physical downlink control channel and the signaling (eg, corresponding to FIG. 3 - Steps S304, S404, and S504 in 5.
  • the signaling is provided in one of: downlink control information DCI, subframes, frequencies and antenna ports in the physical downlink control channel.
  • the D2D communication with one or more user equipments includes one of unicast, multicast, and broadcast.
  • method 900 ends.
  • the device 600 includes: a receiving device 601, configured to receive a resource request message for D2D communication from a first user equipment; and a first sending device 602, configured to respond to Sending, by the resource request message, a first physical downlink control channel and a second physical downlink control channel to the first user equipment and the second user equipment, respectively, and providing a sender for indicating the D2D communication And the signaling of the receiver.
  • a receiving device 601 configured to receive a resource request message for D2D communication from a first user equipment
  • a first sending device 602 configured to respond to Sending, by the resource request message, a first physical downlink control channel and a second physical downlink control channel to the first user equipment and the second user equipment, respectively, and providing a sender for indicating the D2D communication And the signaling of the receiver.
  • the transmitting of the first physical downlink control channel and the second physical downlink control channel is performed in the same subframe.
  • the first physical downlink control channel is the same as the second physical downlink control channel.
  • a plurality of user equipments in the wireless communication system are divided into one or more groups, and the first user equipment and the second user equipment are in the same group
  • the device 600 further includes: a second sending device 603, configured to send the first PDCCH to all other user equipments in the same group as the first user equipment and the second user equipment, and provide Signaling of the sender and receiver of the D2D communication.
  • the signaling is provided in one of: downlink control information DCI in the first physical downlink control channel and the second physical downlink control channel, Subframe, frequency, and antenna port.
  • the device 700 includes: a sending device 701, configured to send a resource request message for D2D to a base station, and a receiving device 702, configured to receive a physical downlink from the base station, according to an embodiment of the present invention.
  • a control channel, and signaling for indicating a sender and a receiver of the D2D communication a decoding device 703, configured to temporarily decode the physical downlink control channel by a corresponding wireless network; and the communication device 704 , the physical downlink for decoding based Information in the channel control channel and the signaling, described in association with one or more user equipments
  • the signaling is provided in one of: downlink control information DCI, a subframe, a frequency, and an antenna port in the physical downlink control channel.
  • the D2D communication with one or more user equipments includes one of unicast, multicast, and broadcast.
  • devices 600 and 700 can be implemented in a variety of ways, including software, hardware, firmware, or any combination thereof.
  • the various devices of devices 600 and 700 can be implemented using software and/or firmware modules.
  • the devices of devices 600 and 700 can also be implemented using hardware modules.
  • the devices of devices 600 and 700 can be implemented as an integrated circuit (IC) chip or an application specific integrated circuit (ASIC).
  • the devices of devices 600 and 700 can also be implemented as a system on a chip (SOC).
  • SOC system on a chip
  • D2D communication can be efficiently realized, PDCCH overhead can be reduced, and device-to-device multicast and multicast can be conveniently performed.
  • each block of the flowchart or block diagram can represent a module, a program segment, or a portion of code, the module, the program segment, or a portion of code comprising one or more Executable instructions.
  • the functions noted in the blocks may also occur in a different order than that illustrated in the drawings. For example, two successively represented blocks may actually be executed substantially in parallel, sometimes It can also be performed in the reverse order, depending on the function involved.
  • the methods disclosed in the embodiments of the present invention can be implemented in software, hardware, or a combination of software and hardware.
  • the hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor, personal computer (PC), or mainframe.
  • the invention is implemented as software including, but not limited to, firmware, resident software, microcode, and the like.
  • a computer program product that reads media access, the media provides program code for use by or in connection with a computer or any instruction execution system.
  • a computer-usable or computer-readable mechanism can be any tangible device that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
  • the medium can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system (or apparatus or device) or a propagation medium.
  • Examples of computer readable media include semiconductor or solid state memory, magnetic tape, removable computer disks, random access memory (RAM), read only memory (ROM), hard disk and optical disk. Examples of current optical discs include compact disc-read only memory (CD-ROM), compact disc-read/write (CD-R/W), and DVD.
  • a system suitable for storing and/or executing program code in accordance with embodiments of the present invention will include at least one processor coupled directly or indirectly through a system bus to a memory memory, a mass storage, and a temporary providing at least a portion of program code.
  • a cache memory that is stored to reduce the number of times the code must be fetched from the mass storage during execution.
  • I/O devices including but not limited to keyboards, displays, pointing devices, etc.
  • I/O devices can be coupled to the system either directly or through an intermediate I/O controller.
  • Network adapters can also be coupled to the system to enable the system to be coupled to other systems or remote printers or storage devices through intervening private or public networks.
  • Modems, cable modems, and Ethernet cards are just a few examples of the types of network adapters currently available.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de prise en charge de communications de dispositif à dispositif (D2D) dans un système de communication sans fil. Le procédé consiste : à recevoir, d'un premier équipement d'utilisateur, un message de demande de ressource pour une communication D2D; et à répondre au message de demande de ressource en envoyant séparément un premier canal de commande physique sur la liaison descendante et un second canal de commande physique sur la liaison descendante au premier équipement d'utilisateur et à un second équipement d'utilisateur, puis à envoyer une signalisation indiquant la communication D2D à un expéditeur et à un destinataire.
PCT/CN2013/075484 2013-05-10 2013-05-10 Procédé et dispositif pour la prise en charge de communications de dispositif à dispositif (d2d) dans un système de communication sans fil Ceased WO2014179989A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380076035.7A CN105144813B (zh) 2013-05-10 2013-05-10 用于支持无线通信系统中的设备至设备d2d通信的方法和设备
PCT/CN2013/075484 WO2014179989A1 (fr) 2013-05-10 2013-05-10 Procédé et dispositif pour la prise en charge de communications de dispositif à dispositif (d2d) dans un système de communication sans fil

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PCT/CN2013/075484 WO2014179989A1 (fr) 2013-05-10 2013-05-10 Procédé et dispositif pour la prise en charge de communications de dispositif à dispositif (d2d) dans un système de communication sans fil

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CN112584358A (zh) * 2019-09-30 2021-03-30 华为技术有限公司 一种设备到设备通信的方法及通信装置

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CN112584358A (zh) * 2019-09-30 2021-03-30 华为技术有限公司 一种设备到设备通信的方法及通信装置

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