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WO2015089745A1 - Procédé et dispositif de réseau pour obtenir et configurer une structure de sous-trame - Google Patents

Procédé et dispositif de réseau pour obtenir et configurer une structure de sous-trame Download PDF

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Publication number
WO2015089745A1
WO2015089745A1 PCT/CN2013/089713 CN2013089713W WO2015089745A1 WO 2015089745 A1 WO2015089745 A1 WO 2015089745A1 CN 2013089713 W CN2013089713 W CN 2013089713W WO 2015089745 A1 WO2015089745 A1 WO 2015089745A1
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WO
WIPO (PCT)
Prior art keywords
subframe
information
network device
channel
structure information
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/CN2013/089713
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English (en)
Chinese (zh)
Inventor
刘鹍鹏
刘江华
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 CN201911266267.4A priority Critical patent/CN111163025B/zh
Priority to CN201380003253.8A priority patent/CN105052237B/zh
Priority to PCT/CN2013/089713 priority patent/WO2015089745A1/fr
Publication of WO2015089745A1 publication Critical patent/WO2015089745A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for acquiring and configuring a subframe structure and a network device.
  • the subframe of the communication system includes orthogonal frequency division multiplexing for transmitting data in user communication.
  • the subframe structure includes the subframe included The number of OFDM symbols and the length of the CP before each OFDM symbol.
  • the degree of adaptation of the subframe structure and channel propagation characteristics in the communication system determines the performance of the communication system; the more the subframe structure is adapted to the channel propagation characteristics, the higher the performance of the communication system.
  • the length of the CP in the subframe structure is related to the delay spread.
  • the delay spread of the user propagation environment for the user with large delay spread, the user in a residential building is taken as an example, the user on the lower floor. Since there are many obstructions and more reflections and refractions, the delay spread is relatively large.
  • the length of the CP included in the subframe in which the user is scheduled should be correspondingly larger; For users with small delay spread, such as users on high floors, the occlusion is relatively small, and the probability of the line of sight (LOS) is relatively high, so the delay spread is relatively small, so the user is scheduled.
  • the CP of the subframe should be correspondingly smaller, avoiding waste of network resources and low communication rate; therefore, the fixed subframe structure has low adaptability to users with different channel propagation characteristics, thereby causing low performance of the communication system.
  • the subframe structure of the current mobile network is a fixed subframe structure.
  • the network device communicates with the configured subframe structure.
  • the inventors have found that the prior art has at least the following drawbacks: With a fixed subframe structure, the sub-frame structure has low adaptability to current channel propagation characteristics, thereby degrading communication system performance.
  • the present invention provides a method and a device for acquiring and configuring a subframe structure, which implements dynamic acquisition and configuration of a subframe structure, so that the subframe structure is more adapted to current channel propagation characteristics, thereby improving communication system performance.
  • a method for obtaining a subframe structure including
  • the first network device acquires subframe structure information of the first subframe
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each of the The length of the symbol of OFDM, the length of the cyclic prefix CP of each of the OFDM symbols, the length of the guard interval, and the downlink pilot slot
  • DwPTS Downlink Pilot Time Slot
  • UPPTS Uplink Pilot Time Slot
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the first network device acquires the subframe structure information of the first subframe, including,
  • the first network device detects information of the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, where the N is a positive integer greater than or equal to 1.
  • the fourth aspect in the first aspect In a possible implementation manner, the first network device detects information about the first N OFDM symbols of the first subframe, and obtains subframe structure information of the first subframe, where
  • the first network device detects a physical control format indicator channel (PCFICH) transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe;
  • PCFICH physical control format indicator channel
  • the first network device detects a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, where the PCFICH-like channel is associated with the PCIFCH Channels with similar structures but different transmission resource locations;
  • the first network device detects a Physical Hybrid ARQ Indicator Channel (PHICH) or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe to acquire the first sub-sub Sub-frame structure information of the frame, where the PHICH-like channel is a channel with a different resource location than the PHICH structure;
  • PHICH Physical Hybrid ARQ Indicator Channel
  • the first network device detects a physical downlink control channel (PDCCH) transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe.
  • a physical downlink control channel (PDCCH) transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe.
  • PDCCH physical downlink control channel
  • the method further includes
  • the high layer signaling includes first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe;
  • the first network device detects that the PCFICH transmitted in the first OFDM symbol of the first subframe acquires the subframe structure information of the first subframe, and includes: determining, according to the first indication information, The first subframe is a fixed configuration subframe, and the first network device detects the transmission in the first N OFDM symbols of the first subframe.
  • the PCFICH is configured to parse the PCFICH into the number of symbols occupied by the PDCCH; if the first subframe is determined to be a variable configuration subframe according to the first indication information, the first network device detects the first subframe Transmitted within the first N OFDM symbols of the frame
  • the PCFICH parses the PCFICH into subframe structure information of the first subframe, and the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the first network device detects the first N of the first subframe
  • the PDCCH transmitted in the OFDM symbol acquires the subframe structure information of the first subframe
  • the first network device detects information in downlink control information (DCI) in a PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe to obtain the first subframe.
  • DCI downlink control information
  • the first network device detects the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N symbols of the first subframe or its Cyclic Redundancy Check (CRC)
  • the scrambling code acquires subframe structure information of the first subframe.
  • the acquiring, by the first network device, the subframe structure information of the first subframe includes:
  • the first network device detects information of a last 0 F D M symbol of a previous subframe of the first subframe to obtain subframe structure information of the first subframe.
  • the acquiring, by the first network device, the subframe structure information of the first subframe includes:
  • the first network device detects a channel of a Primary Synchronization Signal (PSS) of the first subframe or a channel of a secondary synchronization signal (SSS) or a channel of a PSS-like channel or SSS Acquiring the subframe structure information of the first subframe by using correlation detection, where the PSS-like channel is similar to the PSS channel structure but different in transmission resource location Channel, the similar SSS channel is a channel similar to the SSS channel structure but with different transmission resource locations.
  • PSS Primary Synchronization Signal
  • SSS secondary synchronization signal
  • the acquiring, by the first network device, the subframe structure information of the first subframe includes:
  • the first network device detects the pilot information of the first subframe to obtain the subframe structure information of the first subframe, where the pilot information includes one or more of the following pilots: Cell-specific RS (CRS), Channel State Information Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS).
  • CRS Cell-specific RS
  • CSI-RS Channel State Information Reference Signal
  • DMRS Demodulation Reference Signal
  • the first network device detects pilot information of the first subframe, and acquires the first sub Subframe structure information of the frame, including,
  • the first network device detects the pilot information of the first subframe, the scrambling code information of the I. or the spreading code information, and acquires subframe structure information of the first subframe;
  • the first network device detects pilot information of at least two OFDM symbols of the first subframe, and acquires subframe structure information of the first subframe by correlation detection.
  • the first network device acquires subframe structure information of the first subframe, including,
  • the first network device detects the rank information of the first subframe to obtain the subframe structure information of the first subframe, where different rank information corresponds to different subframe structures;
  • the first network device detects the reference signal receiving power (RSRP) information of the first subframe to obtain the structure information of the first subframe, where different intervals of the RSRP information are located Corresponds to different subframe structures.
  • RSRP reference signal receiving power
  • a method for configuring a subframe structure including: Transmitting the subframe structure information of the first subframe to the first network device, so that the first network device acquires subframe structure information of the first subframe, where the subframe structure of the first subframe
  • the information is a feature description of the subframe structure of the first subframe that needs to be configured.
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each of the The length of the symbol of OFDM, the length of the CP of each of the OFDM symbols, the length of the guard time interval, the length of the DwPTS, and the length of the UPPTS.
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the sending, by the first subframe, the subframe structure information to the first network device the sending, by the first subframe, the subframe structure information to the first network device
  • the subframe structure information of the first subframe is used before the first subframe Transmitting, to the first network device, an information bearer of the N OFDM symbols, where the subframe structure information of the first subframe is sent to the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe The first - network equipment;
  • Subframe structure information of the first subframe is used by the first N of the first subframe
  • the PCFICH-like channel bearer transmitted in the OFDM symbol is sent to the first network device, where the PCFICH-like channel is a channel similar to the PCIFCH structure but different in transmission resource location;
  • the channel is a channel with a different resource location than the PHICH structure
  • the method further includes
  • the high layer signaling includes first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe;
  • the subframe structure information of the first subframe is sent to the first network device by using a physical control format indication channel PCFICH transmitted in the first N OFDM symbols of the first subframe, where
  • the PCFICH is used to indicate a symbol occupied by the PDCCH
  • the subframe structure information of the first subframe is used before the first subframe Transmitting, by the PDCCH bearer transmitted in the N OFDM symbols, to the first network device,
  • Subframe structure information of the first subframe is used by the first N of the first subframe Transmitting an information bearer in the DCI in the PDCCH common search interval that is transmitted in the OFDM symbol to the first network device;
  • the sending, by the first subframe, the subframe structure information to the first network device includes:
  • the sending, by the first subframe, the subframe structure information to the first network device the sending, by the first subframe, the subframe structure information to the first network device
  • the PS S-like channel is a channel similar to the PS S channel structure but different in transmission resource location
  • the similar SSS channel is a channel similar to the SSS channel structure but different in transmission resource location.
  • the sending, by the first subframe, the subframe structure information to the first network device the sending, by the first subframe, the subframe structure information to the first network device
  • the sub-frame structure information of the first subframe is used by the first subframe Transmitting a frequency information bearer to the first network device,
  • Subframe structure information of the first subframe is used by at least two of the first subframes
  • the pilot information bearer of the OFDM symbol is transmitted to the first network device.
  • a third aspect providing a first network device, including,
  • An acquiring unit configured to acquire subframe structure information of the first subframe
  • the acquiring unit is further configured to: acquire, according to the indication of the subframe structure information of the first subframe, a subframe structure of the first subframe, where the subframe structure information of the first subframe is the A characterization of the subframe structure of the first subframe.
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each The length of the symbol of OFDM, the length of the CP of each of the OFDM symbols, the length of the guard time interval, the length of the DwPTS, and the length of the UPPTS.
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the acquiring unit is specifically configured to:
  • the acquiring unit is specifically configured to:
  • the first network device further includes
  • a receiving unit configured to receive the high layer signaling sent by the second network device, where the high layer signaling includes first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe.
  • the acquiring unit is specifically configured to:
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH. The number of symbols occupied by the PDCCH;
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and the PCFICH is used.
  • the subframe structure information of the first subframe is parsed, and the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the acquiring unit is specifically configured to:
  • the acquiring unit is specifically configured to:
  • the acquiring unit is specifically configured to:
  • the acquiring unit is specifically configured to:
  • pilot information of the first subframe Detecting the pilot information of the first subframe to obtain the subframe structure information of the first subframe, where the pilot information includes one or more of the following pilots: CRS, CSI-RS, DMRS.
  • the acquiring unit is specifically used to:
  • the acquiring unit is specifically configured to:
  • a second network device including:
  • a sending unit configured to send the subframe structure information of the first subframe to the first network device, so that the first network device acquires subframe structure information of the first subframe, where the first sub
  • the subframe structure information of the frame is a feature description of the subframe structure of the first subframe to be configured.
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each of the The length of the symbol of OFDM, the length of the CP of each of the OFDM symbols, the length of the guard time interval, the length of the DwPTS, and the length of the UPPTS.
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the sending unit is specifically configured to:
  • the sending unit is specifically configured to:
  • the channel is a channel with a different resource location than the PHICH structure
  • the sending unit is further configured to:
  • the high layer signaling includes first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe;
  • the unit is specifically used,
  • the PCFICH is used to indicate a symbol occupied by the PDCCH
  • the first subframe is a variable configuration subframe, transmitting, by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe, to the first The number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the sending unit is specifically configured to:
  • the bearer is sent to the first network device.
  • the sending unit is specifically configured to:
  • the sending unit is specifically configured to:
  • the PS S-like channel is a channel similar to the PS S channel structure but different in transmission resource location
  • the similar SSS channel is a channel similar to the SSS channel structure but different in transmission resource location.
  • the sending unit is specifically configured to:
  • the sending unit is specifically configured to:
  • a first network device including:
  • a processor configured to acquire subframe structure information of the first subframe;
  • the processor is further configured to acquire, according to the indication of the subframe structure information of the first subframe, a subframe structure of the first subframe, where the subframe structure information of the first subframe is the A characterization of the subframe structure of the first subframe.
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each The length of the symbol of OFDM, the length of the CP of each of the OFDM symbols, the length of the guard time interval, the length of the DwPTS, and the length of the UPPTS.
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the processor is specifically configured to:
  • the first network device further includes
  • a receiver configured to receive the high layer signaling sent by the second network device, where the high layer signaling includes first indication information, where the first subframe is a fixed configuration subframe or a variable configuration subframe;
  • the processor is specifically configured to:
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH. The number of symbols occupied by the PDCCH;
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and the PCFICH is used.
  • the subframe structure information of the first subframe is parsed, and the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the processor is specifically configured to:
  • pilot information of the first subframe Detecting the pilot information of the first subframe to obtain the subframe structure information of the first subframe, where the pilot information includes one or more of the following pilots: CRS, CSI-RS, DMRS.
  • the processor is specifically configured to:
  • a second network device including a transmitter and a processor, Medium,
  • a transmitter configured to send the subframe structure information of the first subframe to the first network device, so that the first network device acquires subframe structure information of the first subframe, where
  • the subframe structure information of one subframe is a feature description of the subframe structure of the first subframe to be configured.
  • the subframe structure information includes one or more of the following information: a number of OFDM symbols included in the subframe, each The length of the symbol of OFDM, the length of the CP of each of the OFDM symbols, the length of the guard time interval, the length of the DwPTS, and the length of the UPPTS.
  • the subframe structure information is sent to the first network device in a signaling form specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the subframe structure information of the first subframe is carried by information of the first N OFDM symbols of the first subframe, where N is a positive integer greater than or equal to 1.
  • Submesh structure information of the first subframe is carried by a PCFICH transmitted in the first N OFDM symbols of the first subframe;
  • Submesh structure information of the first subframe is carried by a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe, where the similar
  • the channel of the PCFICH is a channel similar to the PCIFCH structure but having different transmission resource locations;
  • Submesh structure information of the first subframe is carried by a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe, where the PHICH-like channel is transmitted similarly to the PHICH structure.
  • the location of the resource is different;
  • the subframe structure information of the first subframe is carried by the PDCCH transmitted in the first N OFDM symbols of the first subframe.
  • the high layer signaling includes first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe;
  • the PCFICH is used to indicate a symbol occupied by the PDCCH
  • the subframe structure information of the first subframe is carried by the PCFICH transmitted in the first N OFDM symbols of the first subframe.
  • Submesh structure information of the first subframe is carried by information in a DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe;
  • Submesh structure information of the first subframe is carried by information of a last symbol of a previous subframe of the first subframe.
  • Submesh structure information of the first subframe is carried by a channel of a PSS of the first subframe or a channel of an SSS or a channel of a PSS or a channel of an SSS, where the PSS-like channel is
  • the PS S channel structure is similar but the transmission resource location is different, and the similar SSS channel is a channel similar to the SSS channel structure but different in transmission resource location.
  • the subframe structure information of the first subframe is carried by the pilot information of the first subframe, where the pilot information includes one or more of the following pilots: CRS, CSI-RS , DMRS.
  • the subframe structure information of the first subframe is carried by pilot information of at least two OFDM symbols of the first subframe.
  • the present invention provides a method for acquiring and configuring a subframe structure, and a network device, which acquires subframe structure information of a first subframe by using a first network device, and acquires a first subframe according to an indication of subframe structure information of the first subframe.
  • Subframe structure The dynamic acquisition and configuration of the subframe structure are implemented, so that the subframe structure is more adapted to the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, the subframe structure and the current channel propagation.
  • the characteristic is low in adaptability, which leads to a defect in the performance of the communication system.
  • FIG. 1 is a schematic flowchart of a method for acquiring a subframe structure according to an embodiment of the present invention
  • FIG. 1B is a schematic diagram of a channel scenario according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for transmitting a subframe structure according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a device of a first network device according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a device of a second network device according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of another apparatus of a first network device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another apparatus of a second network device according to an embodiment of the present invention.
  • Embodiment 1 of the present invention A method for obtaining a subframe structure is provided in Embodiment 1 of the present invention. Referring to FIG. 1A, the method may include:
  • the first network device acquires subframe structure information of the first subframe.
  • the information included in the subframe structure information of the first subframe is a description of a feature of a subframe structure of the first subframe, and the subframe structure information may include one of the following information. Or a plurality of: the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, the length of the guard interval, the length of the DwPTS, the length of the UPPTS; the first subframe structure
  • the content of the information included in the information depends on the type of the first subframe and the portion of the first subframe that needs to be adjusted. The present invention does not specifically limit this.
  • the subframe structure information may be sent to the first network device in a signaling manner specific to the first network device; or may be sent to the first network device group in a multicast manner, for example, the first network device group specific message.
  • the form is sent to the first network device group, for example, in the form of DCI format3, 3A in LTE, and the subframe structure information in the signaling packet is for a first network device group; wherein, the first network device
  • the group includes the Q first network devices, where the Q is greater than or equal to 2; the transmission form of the subframe structure information may be determined according to actual needs, and the present invention does not limit this.
  • the method for the first network device to acquire the subframe structure depends on the method for the device that communicates with the first network device to send the subframe structure. Specifically, the first network device may use any one of the following methods corresponding to the method for transmitting the subframe structure. The method obtains the subframe structure information of the first subframe:
  • the first network device detects the information of the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe, where N is a positive integer greater than or equal to 1
  • the information of the first N OFDM symbols of the first subframe is detected by using any one of the following four methods to obtain the subframe structure information of the first subframe:
  • the first network device detects that the PCFICH transmitted in the first N OFDM symbols of the first subframe acquires subframe structure information of the first subframe.
  • the PCFICH is used to indicate the number of symbols occupied by the PDCCH in the subframe, and is transmitted in the first OFDM symbol of the subframe, and the subframe structure information of the first subframe uses the first N subframes of the first subframe.
  • the first network device may detect, by using any one of the following manners, the PCFICH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe:
  • the size of the PCFICH is 2 bits, and four states can be indicated, where The first three states are still used to indicate the number of symbols occupied by the PDCCH in the subframe, and the fourth state of the vacancy may be used to indicate the subframe structure information of the first subframe, and the first network device detects the first subframe.
  • the fourth state of the PCFICH transmitted in the first N OFDM symbols acquires subframe structure information of the first subframe.
  • the second mode the first network device receives the high layer signaling sent by the second network device, where the high layer signaling includes the first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe.
  • the first network device determines that the first subframe is a variable configuration subframe according to the first indication information, the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH into the first subframe.
  • the subframe structure information of the frame At this time, the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed;
  • the PCFICH transmitted in the first N OFDM symbols of the first subframe is parsed into the number of symbols occupied by the PDCCH.
  • the four states of the PCIFCH indicate the number of symbols of the PDCCH, and corresponding to different subframe structures, that is, different subframe structures may be indicated by different states of the PCIFCH; the first network device detects the state of the PCIFCH according to the corresponding relationship.
  • the subframe structure information of the first subframe may be obtained, where the four states of the PCIFCH and the number of symbols of the indicated PDCCH and the corresponding subframe structure may be in the form of a table, see Table 1; of course, the PCIFCH 4
  • the state and the number of symbols of the indicated PDCCH and the corresponding subframe structure may also be in other forms.
  • Table 1 only reflects the four states of a PCIFCH and the number of indicated PDCCH symbols and the corresponding subframe structure in the form of a table.
  • the relationship between the four states of the PCIFCH and the number of the indicated PDCCH symbols and the corresponding subframe structure and the content of the corresponding relationship may be determined according to actual requirements, which is not limited by the present invention.
  • the first network device detects a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, where the PCFICH-like channel is similar to the PCIFCH structure but transmits the resource location. Different channels.
  • the PCFICH information is encoded and modulated to obtain 16 QPSK symbols, which are transmitted in 4 REGs, each REG contains 4 REs, and the starting position of the PCFICH in the frequency domain is obtained according to the cell ID.
  • the new channel used to indicate the subframe structure can also use multiple REG transmissions, and can be frequency-multiplexed with the PCFICH or transmitted on different OFDM symbols. New channels transmitted in different frequency domain locations and time domain locations can be used. Implicitly indicating different subframe structure information;
  • a PCFICH-like channel is a channel that is redefined in the first subframe and has a similar PCIFCH structure but different transmission resource locations.
  • a PCFICH-like channel may be in the second OFDM symbol of the first subframe or the first one.
  • the OFDM symbol is transmitted in a different location from the PCFICH frequency domain; when the subframe structure information of the first subframe is carried by a channel similar to the PCFICH, the first network device detects the PCFICH-like channel of the first subframe to obtain the first subframe. Subframe structure information. It should be noted that the present invention does not specifically limit the transmission position of the defined PCFICH-like channel.
  • the first network device detects a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe to obtain subframe structure information of the first subframe, where the PHICH-like channel is similar to the PHICH structure. Channels with different resource locations;
  • the first network device detects the PDCCH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe.
  • the first network device may detect the first N OFDM symbols of the first subframe when the first network device detects the PDCCH transmitted in the first N OFDM symbols of the first subframe to obtain the subframe structure information of the first subframe.
  • the information in the DCI in the PDCCH common search interval of the intra-transmission acquires the subframe structure information of the first subframe; or,
  • the first network device detects the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N symbols of the first subframe or the scrambling code information of the CRC to obtain the subframe structure information of the first subframe.
  • Method 2 The first network device detects information of a last OFDM symbol of a previous subframe of the first subframe to obtain subframe structure information of the first subframe.
  • Method 3 The first network device detects a channel of a PSS of a first subframe or a channel of an SSS or a channel of a PSS-like channel or an SSS, and acquires subframe structure information of the first subframe by correlation detection, where PSS-like The channel is a channel similar to the PSS channel structure but different in transmission resource position, and the similar SSS channel is a channel similar to the SSS channel structure but different in transmission resource position.
  • the subframe configuration information of the first subframe may be obtained by using the first channel and the second channel of the first subframe in FIG. 1B, for example, may be a CP length, where the first channel may be a sequence, The second channel transmits another sequence, and the CP length is obtained by correlation detection of the sequence of the first channel and correlation detection of the second channel; wherein, the first channel may be a channel of the PSS, a channel of the SSS, a channel similar to the PSS, and an SSS One of the channels, the second channel may be one of a PSS channel, an SSS channel, a PSS-like channel, and an SSS channel.
  • the fourth network device detects the pilot information of the first subframe to obtain the subframe structure information of the first subframe.
  • the pilot information may include one or more of the following pilots: CRS, CSI- RS, DMRS.
  • the first network device may detect the scrambling code information or the spreading code of the pilot information of the first subframe when the first network device detects the pilot information of the first subframe to obtain the subframe structure information of the first subframe. Obtaining subframe structure information of the first subframe;
  • the sequence of the CRS detecting the first OFDM symbol is correlated with the local sequence on the receiving side to obtain a second correlation peak at the position of T1, and two peaks.
  • the time interval is the length of the OFDM symbol of the first subframe plus the length of the CP.
  • the length of the OFDM symbol is fixed, the length of the CP can be calculated.
  • the first network device detects the rank information of the first subframe to obtain the subframe structure information of the first subframe, where different rank information may correspond to different subframe structures; for example, the first network device may be according to the first The value of r ank of the subframe is used to determine the subframe structure; when the value of rank is less than the first preset threshold, the scattering path of the channel is relatively small, and the first subframe uses the first CP, when the value of r ank When the first preset threshold is greater than the first preset threshold, the first subframe may use the second CP, where the first CP ⁇ current CP ⁇ the second CP;
  • the foregoing example is only used to illustrate the manner in which the first network device detects the rank information of the first subframe to obtain the subframe structure information of the first subframe, and the specific first preset threshold, the first CP, and the second CP.
  • the value of the present invention can be determined according to actual needs, and the present invention does not specifically limit this.
  • Method 6 The first network device detects the RSRP information of the first subframe to obtain the structure information of the first subframe, where different RSRP information ranges may correspond to different subframe structures.
  • the first network device may determine the subframe structure according to the value of the RSRP of the first subframe.
  • the probability that the channel is the LOS path is relatively large.
  • the frame uses the third CP.
  • the first subframe may use the fourth CP, where the third CP ⁇ current CP ⁇ fourth CP;
  • the foregoing example is only used to illustrate the manner in which the first network device detects the RSRP information of the first subframe to obtain the subframe structure information of the first subframe, and the specific second preset threshold, the third CP, and the fourth CP.
  • the value of the present invention can be determined according to actual needs, and the present invention does not specifically limit this.
  • the subframe structure of the first subframe is obtained according to the indication of the subframe structure information of the first subframe, where the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe.
  • the information included in the subframe structure information of the first subframe is a description of a feature of the subframe structure of the first subframe, and the content included in the subframe structure may be different, according to
  • the indication of the information included in the subframe structure information of the first subframe acquired in step 101 may acquire the subframe structure of the first subframe.
  • the subframe structure refers to the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, the length of the guard interval, the length of the DwPTS, the length of the UPPTS, and the like; Subframe type, different information that the subframe structure may contain; for example, for a normal subframe of a Long Term Evolution (LTE) system, the subframe structure may include the number of OFDM symbols included in the subframe, The length of the symbol of each OFDM, the length of the CP of each OFDM symbol; For the special subframe of the LTE system, the subframe structure may include the length of the guard interval, the length of the DwPTS, and the length of the UPPTS; The content of the frame structure may be specifically determined according to the type of the subframe, which is not limited by the present invention.
  • LTE Long Term Evolution
  • the present invention provides a method for acquiring a subframe structure, where the first subframe detects that the first subframe acquires subframe structure information of the first subframe, and obtains the first subframe according to the indication of the subframe structure information of the first subframe.
  • Subframe structure The dynamic acquisition and configuration of the subframe structure are implemented, so that the subframe structure is more adapted to the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, the subframe structure and the current channel propagation.
  • the characteristic is low in adaptability, which leads to a defect in the performance of the communication system.
  • a second embodiment of the present invention provides a method for configuring a subframe structure.
  • a structure of a subframe suitable for the transmission environment has been determined according to a transmission environment, and the present invention determines a subframe structure according to a transmission environment.
  • the method does not require specific requirements. Referring to Figure 2, the method can include:
  • the subframe structure information of the first subframe is sent to the first network device, so that the first network device acquires the subframe structure information of the first subframe, where the subframe structure information of the first subframe is A feature description of a subframe structure of the first subframe to be configured.
  • the subframe structure information may include one or more of the following information: the number of OFDM symbols included in the subframe, the length of each OFDM symbol, and each The length of the CP of the OFDM symbol, the length of the guard interval, the length of the DwPTS, and the length of the UPPTS; the content of the information contained in the first subframe structure information depends on the type of the first subframe and the portion of the first subframe that needs to be adjusted.
  • the present invention is not specifically limited thereto.
  • the subframe structure information may be sent to the first network device in a signaling manner specific to the first network device; or may be sent to the first network device group in a multicast manner, for example, the first network device group specific message.
  • the form is sent to the first network device group, for example, in the form of DCI format3, 3A in LTE, and the subframe structure information in the signaling packet is for a first network device group; wherein, the first network device
  • the group includes the Q first network devices, where the Q is greater than or equal to 2; the transmission form of the subframe structure information may be determined according to actual needs, and the present invention does not limit this.
  • the subframe structure information of the first subframe is sent to the first network device by using different information bearers.
  • the first network device detects the first subframe to obtain the subframe structure, the corresponding Obtaining the subframe structure information of the first subframe and acquiring the subframe structure of the first subframe.
  • the subframe structure information of the first subframe may be sent to the first network device by using any one of the following methods:
  • Method 1 Send the subframe structure information of the first subframe to the first network device by using the information carrier of the first N OFDM symbols of the first subframe, where N is a positive integer greater than or equal to 1.
  • the PCFICH is used to indicate the number of symbols occupied by the PDCCH in the subframe, and is sent in the first OFDM symbol of the subframe, when the subframe structure information of the first subframe is used in the first subframe of the first subframe.
  • sending the subframe structure information of the first subframe to the first network device by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe may include Under Description:
  • the first mode the size of the PCFICH is 2 bits, and the four states may be indicated, where the first three states are still used to indicate the number of symbols occupied by the PDCCH in the subframe, and the fourth state that is spare may include the first subframe.
  • Subframe structure information
  • the second mode the high-level signaling is sent to the first network device, where the high-level signaling includes the first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe.
  • the subframe structure information of the first subframe is carried by the PCFICH transmitted in the first N OFDM symbols of the first subframe, where the PCFICH is The number of symbols occupied by the indicated PDCCH is fixed;
  • the PCFICH transmitted in the first N OFDM symbols of the first subframe is still used to indicate the number of symbols occupied by the PDCCH.
  • the four states of the PCIFCH indicate the number of symbols of the PDCCH, and corresponding to different subframe structures.
  • the subframe structure information may be sent to the first network device by using different states of the PCIFCH;
  • the state and the indicated number of symbols of the PDCCH and the corresponding subframe structure may be in the form of a table, see Table 1; of course, the four states of the PCIFCH and the number of symbols of the indicated PDCCH and the corresponding subframe structure may also ⁇ Use other forms.
  • a PCFICH-like channel is a channel that is redefined in the first subframe and has a similar PCIFCH structure but different transmission resource locations.
  • a PCFICH-like channel may be in the second OFDM symbol of the first subframe or the first one.
  • the OFDM symbol is transmitted at a position different from the PCFICH frequency domain, and the subframe structure information of the first subframe is carried by a channel similar to the PCFICH. It should be noted that the present invention does not specifically limit the transmission position of the channel similar to the PCFICH. 3.
  • a PHICH or a PHICH-like channel bearer transmitted in the first N OFDM symbols of the first subframe, where the PHICH-like channel is associated with the PHICH structure.
  • the subframe structure information of the first subframe is sent to the first network device by using the PDCCH bearer transmitted in the first N OFDM symbols of the first subframe.
  • the subframe structure information of the first subframe may be sent to the first network device by using the information bearer in the DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe; or
  • the subframe structure information of one subframe is transmitted to the first network device by using the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe or the scrambling code information of the CRC.
  • Method 2 The subframe structure information of the first subframe is sent to the first network device by using the information bearer of the last symbol of the previous subframe of the first subframe.
  • Method 3 The subframe structure information of the first subframe is sent to the first network device by using the channel of the PSS of the first subframe or the channel of the SSS or the channel of the PSS or the channel of the SSS, where the PS is similar to the PS
  • the channel of S is a channel similar to the PSS channel structure but different in transmission resource position
  • the similar SSS channel is a channel similar to the SSS channel structure but different in transmission resource position.
  • Method 4 The subframe structure information of the first subframe is sent to the first network device by using the pilot information of the first subframe.
  • the pilot information may include one or more of the following pilots: CRS , C SI-RS, DMRS.
  • the subframe structure information of the first subframe may be sent to the first network device by using the pilot information of the first subframe, the scrambling code information of the I. or the spreading code information; or
  • the subframe structure information of the subframe is transmitted to the first network device by using pilot information of at least two OFDM symbols of the first subframe.
  • the method for transmitting a subframe structure by transmitting the subframe structure information of the first subframe to the first network device, so that the first network device acquires the subframe structure information of the first subframe, where
  • the subframe structure information of the first subframe is a feature description of a subframe structure of the first subframe to be configured; implementing dynamic acquisition and configuration
  • the subframe structure makes the subframe structure more suitable for the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, and the sub-frame structure has low adaptability to the current channel propagation characteristics. Thus, the performance of the communication system is degraded.
  • the third embodiment of the present invention provides a first network device 30.
  • the first network device 30 may include:
  • the acquiring unit 301 is configured to detect, by using the first subframe, subframe structure information of the first subframe.
  • the obtaining unit 301 is further configured to: acquire, according to the indication of the subframe structure information of the first subframe, a subframe structure of the first subframe, where the subframe structure information of the first subframe is the A characterization of the subframe structure of a sub-frame.
  • the subframe structure information includes one or more of the following information: the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, and the guard time interval. Length, length of DwPTS, length of UPPTS.
  • subframe structure information subframe structure information is sent to the first network device in a signaling manner specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the obtaining unit 301 may be specifically configured to:
  • the obtaining unit 301 is specifically configured to:
  • Detecting a PCFICH-like message transmitted in the first N OFDM symbols of the first subframe Obtaining subframe structure information of the first subframe, where the channel similar to the PCFICH is a channel similar to the PCIFCH structure but having different transmission resource locations;
  • the first network device further includes
  • the receiving unit 302 is configured to receive the high layer signaling that is sent by the second network device, where the high layer signaling includes the first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe.
  • the obtaining unit 301 can be specifically configured to:
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH into a The number of symbols occupied by the PDCCH;
  • the first network device detects a PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH into The subframe structure information of the first subframe, where the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the obtaining unit 301 may be specifically configured to:
  • the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N symbols of the first subframe or the scrambling code information of the CRC is obtained to obtain the subframe structure information of the first subframe.
  • the acquiring unit 301 may be specifically configured to: The information of the last OFDM symbol of the previous subframe of the first subframe is detected to obtain the subframe structure information of the first subframe.
  • the acquiring unit 301 may be specifically configured to:
  • Detecting a channel of a PSS of a first subframe or a channel of a SSS or a channel of a PSS-like channel or an SSS acquiring subframe structure information of a first subframe by correlation detection, where the PSS-like channel is associated with the PSS channel
  • Channels that are similar in structure but have different transmission resource locations, similar to SSS channels are channels that are similar in structure to the SSS channel but have different transmission resource locations.
  • the acquiring unit 301 may be specifically configured to:
  • pilot information of the first subframe to obtain subframe structure information of the first subframe; where, the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
  • the obtaining unit 301 is specifically configured to:
  • the pilot information of the at least two OFDM symbols of the first subframe is detected to obtain the subframe structure information of the first subframe by correlation detection.
  • the acquiring unit 301 may be specifically configured to:
  • the RSRP information of the first subframe is detected to obtain the structure information of the first subframe, where the interval in which the different RSRP information is located may correspond to different subframe structures.
  • the embodiment of the present invention provides a first network device 30, which acquires subframe structure information of a first subframe by using a first network device, and acquires a subframe structure of the first subframe according to the indication of subframe structure information of the first subframe. .
  • the dynamic acquisition and configuration of the subframe structure are implemented, so that the subframe structure is more adapted to the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, the subframe structure and the current channel propagation. Suitable for characteristics
  • the disadvantage is that the performance of the communication system is low.
  • the fourth embodiment of the present invention provides a second network device 40.
  • the second network device 40 may include:
  • the sending unit 401 is configured to send the subframe structure information of the first subframe to the first network device, so that the first network device acquires the subframe structure information of the first subframe, where the subframe structure of the first subframe
  • the information is a characterization of the subframe structure of the first subframe that needs to be configured.
  • the subframe structure information may include one or more of the following information: the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, and the guard time.
  • the subframe structure information is sent to the first network device in a signaling manner specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • the sending unit 401 may be specifically configured to:
  • the subframe structure information of the first subframe is sent to the first network device by using the information carrier of the first N OFDM symbols of the first subframe, where N is a positive integer greater than or equal to 1.
  • the sending unit 401 is specifically configured to:
  • the location of the resource is different;
  • the subframe structure information of the first subframe is transmitted to the first network device by using the PDCCH bearer transmitted in the first N OFDM symbols of the first subframe.
  • the sending unit 401 is further configured to:
  • the sending unit 401 may be specifically configured to:
  • the PCFICH is used to indicate a symbol occupied by the PDCCH
  • the subframe structure information of the first subframe is sent to the first network device by using the PCFICH bearer transmitted in the first N OFDM symbols of the first subframe.
  • the sending unit 401 is specifically configured to:
  • the subframe structure information of the first subframe is transmitted to the first network device by using the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe or the scrambling information of the CRC.
  • the sending unit 401 may be specifically configured to:
  • the subframe structure information of the first subframe is transmitted to the first network device by using the information bearer of the last symbol of the previous subframe of the first subframe.
  • the sending unit 401 may be specifically configured to:
  • Subframe structure information of the first subframe is used for the channel of the PSS of the first subframe or SS S A channel or a PSS-like channel or a channel bearer of the S SS is transmitted to the first network device, where the PS S-like channel is a channel similar to the PS S channel structure but different in transmission resource location, similar to the S SS channel A channel that is similar in structure to the SS S channel but has different transmission resource locations.
  • the sending unit 401 may be specifically configured to:
  • CRS CRS
  • CSI-RS CRS
  • DMRS DMRS
  • the sending unit 401 is specifically configured to:
  • the subframe structure information of the first subframe is transmitted to the first network device by using pilot information of at least two OFDM symbols of the first subframe.
  • the embodiment of the present invention provides a second network device 40, by sending the subframe structure information of the first subframe to the first network device, so that the first network device acquires the subframe structure information of the first subframe.
  • the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe to be configured.
  • the dynamic acquisition and configuration of the subframe structure are implemented, so that the subframe structure is more adapted to the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, the subframe structure and the current channel propagation.
  • the characteristic is low in adaptability, which leads to a defect in the performance of the communication system.
  • the fifth embodiment of the present invention provides a first network device 30.
  • the first network device 30 may include:
  • At least one processor 501 a memory 502, at least one communication bus 503 for enabling connection and mutual communication between the devices, the receiver 504;
  • the communication bus 503 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industry standard architecture ( Extended). Industry Standard Architecture, referred to as EISA) bus.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • Extended extended industry standard architecture
  • EISA Industry Standard Architecture
  • the bus 503 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 5, but it does not mean that there is only one bus or one type of bus.
  • Memory 502 can include read only memory and random access memory and provides instructions and data to processor 501. A portion of memory 502 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the processor 501 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the processor 501 may be configured to acquire the subframe structure information of the first subframe.
  • the processor 501 may be further configured to acquire the subframe structure of the first subframe according to the indication of the subframe structure information of the first subframe, where
  • the subframe structure information of the first subframe is a feature description of the subframe structure of the first subframe.
  • the subframe structure information includes one or more of the following information: the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, and the guard time interval. Length, length of DwPTS, length of UPPTS.
  • the subframe structure information is sent to the first network device in a signaling manner specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • processor 501 can be specifically configured to:
  • the processor 501 is specifically configured to:
  • the receiver 504 is configured to receive the high layer signaling sent by the second network device, where the high layer signaling includes the first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe.
  • the processor 501 can be specifically used,
  • the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH into the PDCCH occupation. Number of symbols;
  • the first network device detects the PCFICH transmitted in the first N OFDM symbols of the first subframe, and parses the PCFICH into the first subframe.
  • the subframe structure information of one subframe, and the number of symbols occupied by the PDCCH indicated by the PCFICH is fixed.
  • the processor 501 can be specifically used,
  • processor 501 may be specifically configured to:
  • the information of the last OFDM symbol of the previous subframe of the first subframe is detected to obtain the subframe structure information of the first subframe.
  • processor 501 may be specifically configured to:
  • Detecting a channel of a PSS of a first subframe or a channel of a SSS or a channel of a PSS-like channel or an SSS acquiring subframe structure information of a first subframe by correlation detection, where the PSS-like channel is associated with the PSS channel
  • Channels that are similar in structure but have different transmission resource locations, similar to SSS channels are channels that are similar in structure to the SSS channel but have different transmission resource locations.
  • processor 501 may be specifically configured to:
  • pilot information of the first subframe to obtain subframe structure information of the first subframe; where, the pilot information may include one or more of the following pilots: CRS, CSI-RS, DMRS.
  • the processor 501 is specifically configured to:
  • the pilot information of the at least two OFDM symbols of the first subframe is detected to obtain the subframe structure information of the first subframe by correlation detection.
  • processor 501 may be specifically configured to:
  • the RSRP information of the first subframe is detected to obtain the structure information of the first subframe, where the interval in which the different RSRP information is located may correspond to different subframe structures.
  • the embodiment of the present invention provides a first network device 30, which acquires subframe structure information of a first subframe by using a first network device, and acquires a subframe structure of the first subframe according to the indication of subframe structure information of the first subframe. .
  • a first network device 30 which acquires subframe structure information of a first subframe by using a first network device, and acquires a subframe structure of the first subframe according to the indication of subframe structure information of the first subframe.
  • Implement dynamic acquisition configure sub-frame structure, and make sub-frames
  • the structure is more suitable for the current channel propagation characteristics, thereby improving the performance of the communication system, and solves the problem that the fixed subframe structure is used in the prior art, and the sub-frame structure has low adaptability to the current channel propagation characteristics, thereby degrading the performance of the communication system. defect.
  • the fourth embodiment of the present invention provides a second network device 40.
  • the second network device 40 may include:
  • the communication bus 603 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA). ) Bus, etc.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus 603 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus.
  • Memory 602 can include read only memory and random access memory and provides instructions and data to processor 601. A portion of memory 602 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the processor 601 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the transmitter 604 may be configured to send the subframe structure information of the first subframe to the first network device, so that the first network device acquires subframe structure information of the first subframe, where the child of the first subframe
  • the frame structure information is a feature description of the subframe structure of the first subframe to be configured.
  • the subframe structure information may include one or more of the following information: the number of OFDM symbols included in the subframe, the length of the symbol of each OFDM, the length of the CP of each OFDM symbol, and the guard time. The length of the interval, the length of the DwPTS, and the length of the UPPTS. Further, the subframe structure information is sent to the first network device in a signaling manner specific to the first network device;
  • the subframe structure information is sent to the first network device group in a multicast manner, where the first network device group includes Q first network devices, where the Q is greater than or equal to 2.
  • processor 601 may be specifically configured to:
  • the subframe structure information of the first subframe is carried by the information of the first N OFDM symbols of the first subframe, where N is a positive integer greater than or equal to 1.
  • the processor 601 is specifically configured to:
  • Submesh structure information of the first subframe is carried by a PCFICH transmitted in the first N OFDM symbols of the first subframe;
  • the subframe structure information of the first subframe is carried by a PCFICH-like channel transmitted in the first N OFDM symbols of the first subframe, where the channel similar to the PCFICH is a channel similar to the PCIFCH structure but having different transmission resource positions;
  • the subframe structure information of the first subframe is carried by a PHICH or a PHICH-like channel transmitted in the first N OFDM symbols of the first subframe, where the PHICH-like channel is a channel with a different resource location than the PHICH structure. ;
  • the subframe structure information of the first subframe is carried by the PDCCH transmitted in the first N OFDM symbols of the first subframe.
  • the transmitter 604 can also be used.
  • the processor 601 Sending the high layer signaling to the first network device, where the high layer signaling includes the first indication information, where the first subframe is used to indicate that the first subframe is a fixed configuration subframe or a variable configuration subframe; correspondingly, the processor 601 Specifically used,
  • the PCFICH is used to indicate a symbol occupied by the PDCCH; If the first subframe is a variable configuration subframe, the subframe structure information of the first subframe is carried by the PCFICH transmitted in the first N OFDM symbols of the first subframe.
  • the processor 601 is specifically configured to:
  • the subframe structure information of the first subframe is carried by the information in the DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe;
  • the subframe structure information of the first subframe is carried by the scrambling code information of the DCI in the PDCCH common search interval transmitted in the first N OFDM symbols of the first subframe or the scrambling information of the CRC.
  • processor 601 may be specifically configured to:
  • the subframe structure information of the first subframe is carried by the information of the last symbol of the previous subframe of the first subframe.
  • processor 601 may be specifically configured to:
  • the subframe structure information of the first subframe is carried by the channel of the PSS of the first subframe or the channel of the SSS or the channel of the PSS or the channel of the SSS, wherein the channel similar to the PSS is similar to the PSS channel structure but the transmission resource location
  • Different channels like SSS channels, are channels that are similar in structure to the SSS channel but have different transmission resource locations.
  • processor 601 may be specifically configured to:
  • the subframe structure information of the first subframe is carried by the pilot information of the first subframe; wherein, the pilot information includes one or more of the following pilots: CRS, CSI-RS, DMRSbeat optional
  • the processor 601 may be specifically configured to:
  • the subframe structure information of the first subframe is carried by the pilot signal of the first subframe, the scrambling code, or the spreading code information;
  • the subframe structure information of the first subframe is carried with pilot information of at least two OFDM symbols of the first subframe.
  • the embodiment of the present invention provides a second network device 40, by sending the subframe structure information of the first subframe to the first network device, so that the first network device acquires the subframe structure information of the first subframe.
  • the subframe structure information of the first subframe is required to be configured.
  • the dynamic acquisition and configuration of the subframe structure are implemented, so that the subframe structure is more adapted to the current channel propagation characteristics, thereby improving the performance of the communication system, and solving the fixed subframe structure used in the prior art, the subframe structure and the current channel propagation.
  • the characteristic is low in adaptability, which leads to a defect in the performance of the communication system.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, and may be located in one place or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (Read-Only Memory, ROM for short), Random Access Memory (RAM), disk or optical disk, and other media that can store program code.

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

Abstract

Les modes de réalisation de la présente invention appartiennent au domaine des communications et concernent un procédé et un dispositif de réseau adaptés pour obtenir et configurer une structure de sous-trame. La structure de sous-trame est obtenue et configurée de façon dynamique d'après un environnement de communication d'un utilisateur et, comme la structure de sous-trame s'adapte mieux aux caractéristiques de communication d'un canal actuel, les performances d'un système de communication sont améliorées. Dans le procédé fourni dans les modes de réalisation de la présente invention : les informations de structure de sous-trame d'une première sous-trame sont obtenues par un premier dispositif de réseau ; et la structure de sous-trame de la première sous-trame est obtenue d'après l'indication des informations de structure de sous-trame de la première sous-trame. Le procédé est utilisé pour obtenir et configurer une structure de sous-trame entre des dispositifs de réseau du système de communication.
PCT/CN2013/089713 2013-12-17 2013-12-17 Procédé et dispositif de réseau pour obtenir et configurer une structure de sous-trame Ceased WO2015089745A1 (fr)

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CN201911266267.4A CN111163025B (zh) 2013-12-17 2013-12-17 一种获取、配置子帧结构的方法及网络设备
CN201380003253.8A CN105052237B (zh) 2013-12-17 2013-12-17 一种获取、配置子帧结构的方法及网络设备
PCT/CN2013/089713 WO2015089745A1 (fr) 2013-12-17 2013-12-17 Procédé et dispositif de réseau pour obtenir et configurer une structure de sous-trame

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