WO2018121186A1 - Procédé et dispositif pour l'envoi et la réception d'un symbole ofdm - Google Patents

Procédé et dispositif pour l'envoi et la réception d'un symbole ofdm Download PDF

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Publication number
WO2018121186A1
WO2018121186A1 PCT/CN2017/114430 CN2017114430W WO2018121186A1 WO 2018121186 A1 WO2018121186 A1 WO 2018121186A1 CN 2017114430 W CN2017114430 W CN 2017114430W WO 2018121186 A1 WO2018121186 A1 WO 2018121186A1
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Prior art keywords
reference signal
resource blocks
pbch
resource
terminal device
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PCT/CN2017/114430
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English (en)
Chinese (zh)
Inventor
黄煌
李赛楠
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华为技术有限公司
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Publication of WO2018121186A1 publication Critical patent/WO2018121186A1/fr

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    • 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 signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference 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
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving orthogonal frequency division multiplexing (OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • Hotspot To meet the needs of large-capacity next generation communication systems, the introduction of high-frequency bands is greater than 6GHz communicate, to utilize large bandwidth, high speed transfer rate, the fifth generation mobile communication system (5 th -Generation, 5G) of one. Due to the high path loss of high frequency communication, a narrow beam is needed to ensure the propagation distance and high beam gain. However, the narrow beam coverage is limited. In order to ensure communication quality, narrow beam alignment between the network side device and the terminal device is required.
  • the network device needs to broadcast system information to the terminal device through a Physical Broadcast Channel (PBCH), the terminal device accesses the network, and updates network-side system information, which is useful data of the PBCH.
  • PBCH Physical Broadcast Channel
  • the terminal device accesses the network, and updates network-side system information, which is useful data of the PBCH.
  • the narrowband beam is scanned by the network device and transmitted to the terminal device.
  • the terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device. Therefore, a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal (ie, Demodulation Reference Signal, DMRS) is required to demodulate the data of the PBCH.
  • DMRS Demodulation Reference Signal
  • FIG. 1 A schematic diagram of a transmission configuration of a prior art PBCH reference signal and a beam reference signal as shown in FIG. 1, the prior art PBCH reference signal is completely included in the beam reference signal.
  • the resource block of the PBCH of each symbol is composed of 12 resource elements (RE elements), of which 8 REs are beam reference signals, and the other 4 REs are useful PBCH data for transmission.
  • Each symbol supports simultaneous transmission of 8 beams, each beam transmitting a different beam reference signal on 8 REs.
  • the eight beam reference signals are transmitted in a code division manner.
  • the terminal device detects the beam reference signal on each resource block, so that the quality of the beam on each resource block can be known, and the beam identifier and the corresponding beam quality can be fed back to the network side device for scheduling by the network side device.
  • the beam transmits data to the terminal device.
  • each resource block uses 8 REs to transmit beam reference signals, and only 4 REs transmit useful PBCH data, and the transmission overhead is very high. Large, reaching 8/12.
  • the present invention provides a method and apparatus for transmitting and receiving OFDM symbols to reduce the overhead of transmitting a beam reference signal and a PBCH reference signal while satisfying beam identification and demodulation of PBCH data.
  • a method for transmitting orthogonal frequency division multiplexing OFDM symbols includes:
  • the network device generates at least one OFDM symbol
  • the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal.
  • the reference signal of the PBCH is used to demodulate the PBCH data;
  • the network device transmits the at least one OFDM symbol by using a transmit beam.
  • At least one OFDM symbol generated and transmitted by the network device is divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the resource block can be used as a beam identification, and another A type of resource block carries a PBCH reference signal, which can be used as a demodulation of PBCH data, thereby reducing the overhead of transmitting a beam reference signal and a PBCH reference signal while satisfying beam identification and demodulation of PBCH data.
  • the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified multiple beams in each of the first resource blocks
  • the PBCH reference signal carried in each second resource block is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.
  • performing full-band beam quality detection on two types of resource blocks included in at least one OFDM symbol for multiple beams identified by a plurality of types of resource blocks can ensure the quality of the detected beam.
  • the number of ports of the second resource block is less than the number of ports of the first resource block.
  • the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect the beam quality of the identified few beams with better beam quality in the second resource block, so that the number of ports of the second resource block is less than The number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • the reference signal in the first resource block can also be used as a PBCH reference signal, so that the data of the PBCH can be demodulated.
  • the reference signals in the plurality of first resource blocks are set in at least one of: time division, frequency division, and code division, and the plurality of second resource blocks
  • the reference signal in is set in at least one of the following ways: time division, frequency division, and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various manners, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the at least one OFDM symbol further includes a synchronization signal.
  • the at least one OFDM symbol may include a synchronization signal, such as a primary synchronization signal and/or a secondary synchronization signal, in addition to two types of resource blocks.
  • a synchronization signal such as a primary synchronization signal and/or a secondary synchronization signal
  • the multiple first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, where the beams are in the multiple third resource blocks
  • the reference signal and the PBCH reference signal are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • a network device having a function of implementing the behavior of the network device in the above method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device includes:
  • Generating unit configured to generate at least one orthogonal frequency division multiplexing OFDM symbol
  • the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal.
  • the reference signal of the PBCH is used to demodulate the PBCH data;
  • a sending unit configured to send, by using a transmit beam, the at least one OFDM symbol generated by the generating unit.
  • the network device includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program code stored in the memory, and execute the following operating:
  • the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal.
  • the reference signal of the PBCH is used to demodulate the PBCH data;
  • the at least one OFDM symbol is transmitted by the transmitter using a transmit beam.
  • the principle and the beneficial effects of the device can be referred to the first aspect and the possible implementation manners of the first aspect and the beneficial effects. Therefore, the implementation of the device can be referred to the implementation of the method. The repetitions are not repeated here.
  • a method for receiving an OFDM symbol comprising:
  • the terminal device receives at least one OFDM symbol that the network device transmits by using a transmit beam, where the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the plurality of first resource blocks and the multiple The number of ports and/or the port number of the reference signal of the second resource block is different, wherein each of the first resource blocks carries a beam reference signal, and each of the second resource blocks carries a physical broadcast channel PBCH reference signal;
  • the terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.
  • the at least one OFDM symbol received by the terminal device from the network device is divided into two types of resource blocks, and the beam reference signal is carried by only one type of resource block, and is carried in another type of resource block.
  • a PBCH reference signal the terminal device identifies a plurality of beams transmitted by the network device according to the beam reference signal carried in the resource block, and the data in the at least one OFDM symbol according to the PBCH reference signal carried in the other type of resource block Demodulation can simultaneously satisfy the identification of the beam and the demodulation of the PBCH data, and the overhead of transmitting the beam reference signal and the PBCH reference signal on the network device side is greatly reduced.
  • the method further includes:
  • the terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks;
  • the terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.
  • the terminal device performs full-band beam quality detection on two types of resource blocks included in the at least one OFDM symbol for the multiple beams identified by the multiple resource blocks, thereby ensuring the quality of the detected beam.
  • the number of ports of the second resource block is less than the number of ports of the first resource block.
  • the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect the beam quality of the identified few beams with better beam quality in the second resource block, so that the number of ports of the second resource block is less than The number of ports of the first resource block, thereby further reducing the overhead of the network device transmitting the beam reference signal and the PBCH reference signal.
  • each of the first resource blocks further carries a PBCH reference signal.
  • the reference signal in the first resource block can also be used as a PBCH reference signal, so that the data of the PBCH can be demodulated.
  • the reference signals in the plurality of first resource blocks are set in at least one of the following: time division, frequency division, and code division, and the plurality of second resource blocks
  • the reference signal in is set in at least one of the following ways: time division, frequency division, and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various manners, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the at least one OFDM symbol further includes a synchronization signal.
  • the at least one OFDM symbol may include a synchronization signal, such as a primary synchronization signal and/or a secondary synchronization signal, in addition to two types of resource blocks.
  • a synchronization signal such as a primary synchronization signal and/or a secondary synchronization signal
  • the multiple first resource blocks and the plurality of second resource blocks are combined into a plurality of third resource blocks, where the beams are in the multiple third resource blocks
  • the reference signal and the PBCH reference signal are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • a terminal device having a function of implementing the behavior of the terminal device in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal device includes:
  • a receiving unit configured to receive, by the network device, at least one orthogonal frequency division multiplexing OFDM symbol that is sent by using a transmit beam, where the at least one OFDM symbol includes multiple first resource blocks and multiple second resource blocks, where the multiple The first resource block and the reference signal of the plurality of second resource blocks have different port numbers and/or port numbers, wherein each first resource block Carrying a beam reference signal, each of which carries a physical broadcast channel PBCH reference signal;
  • An identifying unit configured to identify, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device;
  • a demodulation unit configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.
  • the terminal device includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program code stored in the memory, and execute the following operating:
  • At least one orthogonal frequency division multiplexing OFDM symbol that is sent by the network device by using a transmit beam
  • the at least one OFDM symbol includes multiple first resource blocks and multiple second resource blocks, where the multiple The first resource block and the reference signal of the plurality of second resource blocks have different port numbers and/or port numbers, wherein each first resource block carries a beam reference signal, and each second resource block carries a physical Broadcast channel PBCH reference signal;
  • the principle and the beneficial effects of the device can be referred to the first aspect and the possible implementation manners of the first aspect and the beneficial effects. Therefore, the implementation of the device can be referred to the implementation of the method. The repetitions are not repeated here.
  • FIG. 1 is a schematic diagram of a transmission configuration of a PBCH reference signal and a beam reference signal in the prior art
  • FIG. 2 is a schematic diagram of interaction between sending and receiving of an OFDM symbol according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of interaction between sending and receiving of another OFDM symbol according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of transmission configuration of a PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention
  • FIG. 6 is a schematic diagram of transmission configuration of another PBCH reference signal and a beam reference signal according to an example of the embodiment of the present invention
  • FIG. 7 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another terminal device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of still another terminal device according to an embodiment of the present invention.
  • the terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and the terminal device may refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, and a mobile station. , remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SSIP”) phone, a Wireless Local Loop (WLL) station, a personal digital office.
  • SSIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a handheld device with wireless communication capabilities a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a UE in a future 5G network, and the like.
  • the network device in the embodiment of the present invention may be used to communicate with a terminal device, where the network device may be, for example, a base station (Base Transceiver Station, or "BTS”) in a GSM system or a CDMA system, or may be a WCDMA system.
  • BTS Base Transceiver Station
  • NodeB a base station
  • eNB evolved base station
  • eNodeB evolved base station
  • the network device may be a relay station, an access point, In-vehicle devices, wearable devices, wireless-Fidelity (Wi-Fi) stations, base stations that can be next-generation communications, such as 5G base stations, small stations, micro stations, or TRP (transmission reception point, Transmission receiving point); it can also be a relay station, an access point, an in-vehicle device, a wearable device, etc. that operate in a high frequency band.
  • FIG. 2 is a schematic diagram of interaction between sending and receiving of an OFDM symbol according to an embodiment of the present invention.
  • the method includes the following steps:
  • the network device generates at least one orthogonal frequency division multiplexing OFDM symbol.
  • the network device needs to broadcast the system information to the terminal device through the PBCH, and the terminal device accesses the network and updates the network side system information, where the system information includes some configurations of the network, such as system characteristics, and the system information is useful data of the PBCH, the system Information is carried by OFDM symbols.
  • the system information includes some configurations of the network, such as system characteristics, and the system information is useful data of the PBCH, the system Information is carried by OFDM symbols.
  • the narrowband beam is scanned by the network device and transmitted to the terminal device.
  • the terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device.
  • a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal is required to demodulate the data of the PBCH, and the beam reference signal and the PBCH reference signal are also included in the OFDM symbol. Therefore, one or more OFDM symbols include at least a beam reference signal, a PBCH reference signal, and PBCH useful data. Optionally, the at least one OFDM symbol further includes a synchronization signal, such as a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the generated one or more OFDM symbols include a plurality of first resource blocks and a plurality of second resource blocks, and the ports of the plurality of first resource blocks and the reference signals of the plurality of second resource blocks
  • the number of the first resource block and the reference signal of the plurality of second resource blocks are different, and may also be reference signals of the multiple first resource blocks and the multiple second resource blocks.
  • the number of ports and port number are different.
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data.
  • the network device only carries the beam reference signal through the plurality of first resource blocks, and carries the PBCH reference signal through the plurality of second resource blocks, and is used as the demodulation of the PBCH data, thereby satisfying the beam identification and the PBCH data. At the same time of demodulation, the overhead of transmitting the beam reference signal and the PBCH reference signal is reduced.
  • the number of ports of the second resource block is less than the number of ports of the first resource block. In this implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • both the first resource block and the reference signal in the second resource block can be used to demodulate the PBCH data.
  • the reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time division, frequency division, and code division
  • the reference signals in the plurality of second resource blocks may be performed in at least one of the following manners Settings: time division, frequency division and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various ways, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the network device sends the at least one OFDM symbol by using a transmit beam.
  • the one or more OFDM symbols are transmitted by the transmit beam to the terminal device.
  • the method of sending may be broadcast or unicast.
  • the network device may generate one OFDM symbol, where multiple first resource blocks and multiple second resource blocks are located in one OFDM symbol, and the network device may also generate multiple OFDM symbols, that is, the first resource block and the first resource block. Two resource blocks can span multiple symbols, but each symbol is transmitted using a transmit beam.
  • the terminal device receives at least one OFDM symbol transmitted by the network device by using a transmit beam.
  • the terminal device identifies, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device.
  • the terminal device After receiving, by the terminal device, one or more OFDM symbols from the network device, since the plurality of first resource blocks in the symbol carry a beam reference signal, the beam reference signal is used by the terminal device to identify multiple beams sent by the network device, The terminal device can identify multiple beams sent by the network device according to the beam reference signal carried by each first resource block. Specifically, each first resource block carries multiple beam reference signals, so that multiple beams transmitted by the network device can be identified.
  • the specific identification process can refer to the prior art.
  • the terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.
  • the plurality of second resource blocks carry the PBCH reference signal
  • the PBCH reference signal is used to demodulate the PBCH data, and therefore, the terminal device carries according to each second resource block.
  • the PBCH reference signal can demodulate the PBCH data carried in the symbol.
  • the specific demodulation process can refer to the prior art.
  • one or more OFDM symbols generated and transmitted by the network device include two types of resource blocks, and only one type of resource block carries a beam reference signal, and another type of resource block carries a PBCH reference.
  • the terminal device receives the one or more OFDM symbols, and identifies, according to the beam reference signal carried in the resource block of the one of the one or more OFDM symbols, multiple beams sent by the network device, according to the one or more OFDM
  • the PBCH reference signal carried in another type of resource block in the symbol demodulates data in one or more OFDM symbols, and can simultaneously satisfy beam identification and demodulation of PBCH data, and network device side transmits beam reference signal and The overhead of the PBCH reference signal is greatly reduced.
  • FIG. 3 is a schematic diagram of interaction between sending and receiving of another OFDM symbol according to an embodiment of the present invention.
  • the method includes the following steps:
  • the network device generates at least one orthogonal frequency division multiplexing OFDM symbol.
  • the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal.
  • the reference signal of the PBCH is used to demodulate the PBCH data.
  • the number of ports of the second resource block is less than the number of ports of the first resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • the reference signals in the plurality of first resource blocks are set in at least one of the following: time division, frequency division sum, code division, and reference signals in the plurality of second resource blocks are at least One way to set: time division, frequency division and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various ways, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the at least one OFDM symbol further includes a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.
  • a synchronization signal such as a primary synchronization signal and a secondary synchronization signal.
  • the network device sends the at least one OFDM symbol by using a transmit beam.
  • the network device uses the same transmit beam to transmit multiple OFDM symbols to ensure channel consistency.
  • multiple OFDM symbols may also be transmitted using different transmit beams.
  • the terminal device identifies, according to the beam reference signal carried by each of the first resource blocks, multiple beams sent by the network device.
  • the terminal device demodulates data in the at least one OFDM symbol according to the PBCH reference signal.
  • Steps S201 to S204 are the same as steps S101 to S104 of the foregoing embodiment, and details are not described herein again. Different from the foregoing embodiment, the embodiment further includes the following steps S205 and S206:
  • the terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks.
  • a high frequency band When a high frequency band is introduced for communication, a plurality of narrow beams are scanned by the network device and transmitted to the terminal device, and the terminal device needs to identify multiple beams sent by the network device. At the same time, the terminal device measures the quality of the narrow beams, determines which narrow beams are sent by the network device, and feeds back to the network side device.
  • the beam reference signals carried in the multiple first resource blocks may be used to detect the beam quality of the identified multiple beams in each of the first resource blocks, and the terminal device is configured according to each of the first resource blocks. And transmitting, by the beam reference signal, the beam quality of the identified multiple beams in each of the first resource blocks.
  • the beam reference signal can also be used as a PBCH reference signal for demodulating PBCH data.
  • the terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.
  • the PBCH reference signal carried in each second resource block may be used for demodulating the PBCH data, and may also be used to measure the quality of the better quality beam in each of the first resource blocks. Further modified in the second resource block, the terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, the beam quality of the identified multiple beams in each of the second resource blocks, thereby implementing Full-band detection of beam quality is performed in a plurality of first resource blocks and a plurality of second resource blocks, thereby further ensuring the quality of the detected beams.
  • FIG. 4 is a schematic diagram of a PBCH reference signal and a beam reference signal transmission configuration according to an example of an embodiment of the present invention.
  • two types of PBCH resource blocks namely, PBCH1 and PBCH2 are included, and the antenna ports for transmitting reference signals in each resource block are different, for example, different port numbers and/or port numbers. different.
  • other non-PBCH resource blocks may be located in other OFDM symbols, or may be located in the same OFDM symbol as PBCH1 and PBCH2, and the non-PBCH resource block includes a synchronization signal, for example, PSS/SSS.
  • a resource block can include multiple resource particles.
  • the network device can transmit dual-polarized beams, each of which transmits 4 beams, polarization 1 transmission beams 0, 2, 4, 6, and polarization 2 transmission beams 1, 3, 5, 7. Since different beams in the same polarization cover different directions, the terminal device can only receive one beam in the same polarization (determined by the actual scene), and the signal quality of other beams is too poor to be ignored.
  • the reference signal antenna ports of the 8 REs in PBCH1 are ports 0-7
  • the reference signal antenna ports of the 2 REs in PBCH2 are port 8 and port 9 (ie, the number of ports and port numbers of PBCH1 and PBCH2 are different).
  • Eight different beams are simultaneously transmitted in one OFDM symbol, and each of the antenna ports 0-7 corresponds to one beam.
  • Antenna port 8 transmits beams 0, 2, 4, 6, which are beams of polarization 1.
  • Antenna port 9 transmits beams 1, 3, 5, 7, which are beams of polarization 2.
  • the reference signals in antenna ports 0-7 and antenna ports 8, 9 can be performed by any one of time division, frequency division, code division, any combination of two, or a combination of three. Settings.
  • the resource particles 1-8 in the PBCH1 resource block can function as a beam reference signal, that is, the terminal device identifies the beam (identification beam 0-7) transmitted by the network device and detects which beam quality is better. It is assumed here that at most two beams are of good quality, such as beam 2 and beam 3. Since most of the beam energy of antenna port 8 comes from beam 2, most of the energy of antenna port 9 comes from beam 3, and the detected beam 2 and beam 3 can be further detected by resource particles 1 and 2 in the PBCH 2 resource block. The beam quality in PBCH2 is corrected to ensure full-band beam quality detection in all PBCH resource blocks.
  • the reference signal of each PBCH resource block (including PBCH1 and PBCH2) can be used as a PBCH reference signal for demodulation of PBCH data. Therefore, this example can simultaneously satisfy the functions of PBCH demodulation and full-band beam quality detection. In PBCH2, only two REs are needed to transmit the reference signal, and the signaling overhead is reduced from 8/12 of the prior art to 2/12.
  • the two types of PBCH resource blocks may also span multiple symbols, that is, included in multiple OFDM symbols, as shown in FIG.
  • FIG. 5 is a schematic diagram of a transmission configuration of another PBCH reference signal and a beam reference signal according to an example of an embodiment of the present invention.
  • the two types of resource blocks span symbols 1 and 2.
  • FIG. 6 is a schematic diagram of another PBCH reference signal and a beam reference signal transmission configuration according to an example of an embodiment of the present invention.
  • the network device can transmit dual-polarized beams, each of which transmits 4 beams, polarization 1 transmission beams 0, 2, 4, 6, and polarization 2 transmission beams 1, 3, 5, 7. Since different beams in the same polarization cover different directions, it is assumed that the terminal device can only receive at most two beams in the same polarization (determined by the actual scene), and other beam qualities are too poor to be ignored.
  • the beam that can be received is: one of beams 0, 2, one of 4, 6, one of 1, 3, one of 5, 7.
  • the beam reference signal and the PBCH reference signal are respectively placed in different resource blocks, ie, RS resource blocks and PBCH resource blocks.
  • the RS resource block contains 24 REs (three groups of resource particles with labels 1 to 8, where the number of REs is only an example, and the number of REs is not limited), and is only used to transmit beam reference.
  • the signal is numbered according to the serial number of the three groups of 0-7.
  • the reference signal antenna port corresponding to the beam reference signal is 0-7. It is supported to transmit 8 different beams simultaneously in one symbol, and each of the antenna ports 0-7 corresponds to one beam.
  • the reference signals of antenna ports 0-7 can be set by frequency division or code division. Beams 0 to 7 can be identified by the beam reference signal and which 4 beams are better detected, such as beams 2, 3, 5, 6.
  • the PBCH resource block includes 4 REs, which are used to transmit PBCH reference signals (such as resource particles labeled 1 to 4 in the figure), and the other 8 REs are used to transmit PBCH data.
  • the PBCH reference signal can further correct the better quality beam 2, 3, 5, and 6 detected by the beam reference signal in the RS resource block in the PBCH resource block, that is, perform full-band beam quality detection.
  • Antenna port 8 transmits beams 0, 2 and antenna port 9 transmits beams 4, 6.
  • Antenna port 10 transmits beams 1, 3, antenna port 11 transmits beams 5, 7, and most of the beam energy of antenna port 8 comes from beam 2, and most of the energy of antenna port 9 comes from beam 6, most of the beam of port 10.
  • the energy comes from beam 3, and most of the energy of antenna port 11 comes from beam 5, so the quality of beams 2, 3, 5, 6 can be detected in the PBCH resource block by the PBCH reference signal in the PBCH resource block.
  • the PBCH reference signal of each PBCH resource block can be used for demodulation of PBCH data. Therefore, this example can simultaneously satisfy the functions of PBCH demodulation and full-band beam quality detection.
  • the signaling overhead of the transmission reference signal in the PBCH resource block has been reduced from 8/12 to 4/12.
  • FIG. 7 is A schematic diagram of a transmission configuration of still another PBCH reference signal and a beam reference signal according to an embodiment of the present invention.
  • the two types of resource blocks span symbols 1 and 2.
  • the multiple first resource blocks and the multiple second resource blocks are combined into multiple third resource blocks, where the beam reference signal and the PBCH are in the multiple third resource blocks.
  • the reference signals are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • FIG. 8 is a schematic diagram of another PBCH reference signal and a beam reference signal transmission configuration according to an embodiment of the present invention.
  • the PBCH reference signal and the beam reference signal are concentrated in one resource block, where the PBCH reference is used.
  • the signal and beam reference signals are interleaved in the frequency domain.
  • one or more OFDM symbols generated and transmitted by the network device include two types of resource blocks, and only one type of resource block carries a beam reference signal, and another type of resource block carries a PBCH reference.
  • the terminal device receives the one or more OFDM symbols, and identifies, according to the beam reference signal carried in the resource block of the one of the one or more OFDM symbols, multiple beams sent by the network device, according to the one or more OFDM
  • the PBCH reference signal carried in another type of resource block in the symbol demodulates data in one or more OFDM symbols, and can simultaneously satisfy beam identification and demodulation of PBCH data, and network device side transmits beam reference signal and
  • the overhead of the PBCH reference signal is greatly reduced; the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, thereby ensuring detection The quality of the beam.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device 1000 includes: a generating unit 11 and a sending unit 12; wherein:
  • the generating unit 11 is configured to generate at least one OFDM symbol.
  • the network device needs to broadcast the system information to the terminal device through the PBCH, and the terminal device accesses the network and updates the network side system information, where the system information includes some configurations of the network, such as system characteristics, and the system information is used as PBCH useful data, the system information is carried by OFDM symbols.
  • the narrowband beam is scanned by the network device and transmitted to the terminal device.
  • the terminal device needs to identify the beams, determine which narrow beams are sent by the network device, and feed back to the network device.
  • a beam reference signal is needed to help the terminal device identify multiple beams transmitted by the network device, and a PBCH reference signal is required to demodulate the data of the PBCH, and the beam reference signal and the PBCH reference signal are also included in the OFDM symbol. Therefore, one or more OFDM symbols include at least a beam reference signal, a PBCH reference signal, and PBCH useful data. Optionally, the at least one OFDM symbol further includes a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.
  • the one or more OFDM symbols generated by the generating unit 11 include a plurality of first resource blocks and a plurality of second resource blocks, and the reference of the multiple first resource blocks and the multiple second resource blocks
  • the number of ports of the signal is different, and the port numbers of the reference signals of the multiple first resource blocks and the multiple second resource blocks are different, and may be multiple first resource blocks and the multiple second resource blocks.
  • the reference signal has a different number of ports and port numbers.
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data.
  • the network device only carries the beam reference signal through the plurality of first resource blocks, and carries the PBCH reference signal through the plurality of second resource blocks, and is used as the demodulation of the PBCH data, thereby satisfying the beam identification and the PBCH data.
  • the overhead of transmitting the beam reference signal and the PBCH reference signal is reduced.
  • the number of ports of the second resource block is less than the number of ports of the first resource block. In this implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • both the first resource block and the reference signal in the second resource block can be used to demodulate the PBCH data.
  • the reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time division, frequency division, and code division
  • the reference signals in the plurality of second resource blocks may be performed in at least one of the following manners Settings: time division, frequency division and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various ways, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the multiple first resource blocks and the multiple second resource blocks are combined into multiple third resource blocks, in the multiple third resource blocks, the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • the sending unit 12 is configured to send, by using a transmit beam, the at least one OFDM symbol generated by the generating unit.
  • the transmitting unit 12 transmits the one or more OFDM symbols to the terminal device by using a transmitting beam.
  • the method of sending may be broadcast or unicast.
  • the generating unit 11 may generate one OFDM symbol, where multiple first resource blocks and multiple second resource blocks are located in one OFDM symbol, and the generating unit 11 may also generate multiple OFDM symbols, that is, the first resource block.
  • the second resource block can span multiple symbols, but each symbol is transmitted using a transmit beam.
  • the sending unit 12 transmits multiple OFDM symbols by using the same transmit beam to ensure channel consistency.
  • the transmitting unit 12 may also transmit multiple OFDM symbols by using different transmit beams.
  • a network device one or more OFDM symbols generated and transmitted by a network device, according to an embodiment of the present invention
  • the number is divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the resource block can be used as a beam identification, and another type of resource block carries a PBCH reference signal, which can be used as PBCH data.
  • Demodulation thereby reducing the overhead of transmitting the beam reference signal and the PBCH reference signal while satisfying beam identification and demodulation of PBCH data.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device 2000 includes: a receiving unit 21, an identifying unit 22, and a demodulating unit 23; wherein:
  • the receiving unit 21 is configured to receive one or more OFDM symbols that are sent by the network device by using a transmit beam.
  • the one or more OFDM symbols received by the receiving unit 21 include at least a beam reference signal, a PBCH reference signal, and PBCH useful data.
  • the one or more OFDM symbols further include a synchronization signal, such as a primary synchronization signal and a secondary synchronization signal.
  • the one or more OFDM symbols include a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks are different
  • the port number of the reference signal of the multiple first resource blocks and the multiple second resource blocks may be different, and may also be the ports of the reference signals of the multiple first resource blocks and the multiple second resource blocks. The number and port number are different.
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal, and the PBCH reference signal Used to demodulate PBCH data.
  • the number of ports of the second resource block is less than the number of ports of the first resource block. In this implementation manner, the number of ports of the second resource block is less than the number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • both the first resource block and the reference signal in the second resource block can be used to demodulate the PBCH data.
  • the reference signals in the plurality of first resource blocks may be set in at least one of the following manners: time division, frequency division, and code division
  • the reference signals in the plurality of second resource blocks may be performed in at least one of the following manners Settings: time division, frequency division and code division.
  • the multiple first resource blocks and the multiple second resource blocks are combined into multiple third resource blocks, in the multiple third resource blocks, the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • the identifying unit 22 is configured to identify multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks.
  • the receiving unit 21 After receiving the one or more OFDM symbols from the network device, the receiving unit 21 carries a beam reference signal, and the beam reference signal is used by the terminal device to identify multiple beams sent by the network device, Therefore, the identification unit 22 can identify multiple beams transmitted by the network device according to the beam reference signal carried by each of the first resource blocks. Specifically, each first resource block carries multiple beam reference signals, so that multiple beams transmitted by the network device can be identified.
  • the specific identification process can refer to the prior art.
  • the demodulation unit 23 is configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.
  • the demodulation unit 23 is configured according to each second.
  • the PBCH reference signal carried by the source block can demodulate the PBCH data carried in the symbol.
  • the specific demodulation process can refer to the prior art.
  • a terminal device in a terminal device, one or more OFDM symbols from a network device received by a terminal device, the one or more OFDM symbols are divided into two types of resource blocks, and the beam is carried by only one type of resource block.
  • a reference signal the other type of resource block carries a PBCH reference signal
  • the terminal device identifies, according to the beam reference signal carried in the resource block of the one or more OFDM symbols, the multiple beams sent by the network device, according to the one or
  • the PBCH reference signal carried in another type of resource block of the plurality of OFDM symbols demodulates data in one or more OFDM symbols, and simultaneously satisfies beam identification and demodulation of PBCH data, and network device side transmission beam
  • the overhead of the reference signal and the PBCH reference signal is greatly reduced.
  • FIG. 11 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.
  • the terminal device 3000 includes: a receiving unit 31, an identifying unit 32, a demodulating unit 33, a first detecting unit 34, and a second detecting unit 35; wherein:
  • the receiving unit 31 is configured to receive, by the network device, at least one OFDM symbol that is sent by using a transmit beam.
  • the identifying unit 32 is configured to identify multiple beams sent by the network device according to the beam reference signal carried by each of the first resource blocks.
  • the demodulation unit 33 is configured to demodulate data in the at least one OFDM symbol according to the PBCH reference signal.
  • the embodiment further includes a first detecting unit 34 and a second detecting unit 35:
  • the first detecting unit 34 is configured to detect, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the first resource blocks.
  • a high frequency band When a high frequency band is introduced for communication, a plurality of narrow beams are scanned by the network device and transmitted to the terminal device, and the terminal device needs to identify multiple beams sent by the network device. At the same time, the terminal device measures the quality of the narrow beams, determines which narrow beams are sent by the network device, and feeds back to the network side device.
  • the beam reference signals carried in the multiple first resource blocks may be used to detect the beam quality of the identified multiple beams in each of the first resource blocks, and the first detecting unit 34 is configured according to each A beam reference signal carried in a resource block, detecting a beam quality of the plurality of beams identified by the identifying unit in each of the first resource blocks.
  • the beam reference signal can also be used as a PBCH reference signal for demodulating PBCH data.
  • the second detecting unit 35 is configured to detect, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the multiple beams identified by the identifying unit in each of the second resource blocks.
  • the PBCH reference signal carried in each second resource block may be used for demodulating the PBCH data, and may also be used to measure the quality of the better quality beam in each of the first resource blocks.
  • the second detecting unit 35 detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam of the plurality of beams identified by the identifying unit in each of the second resource blocks. The quality thus enables full-band detection of beam quality in a plurality of first resource blocks and a plurality of second resource blocks, thereby further ensuring the quality of the detected beam.
  • a terminal device in a terminal device, one or more OFDM symbols from a network device received by a terminal device, the one or more OFDM symbols are divided into two types of resource blocks, and the beam is carried by only one type of resource block.
  • Reference The test signal carries a PBCH reference signal in another type of resource block, and the terminal device identifies, according to the beam reference signal carried in the resource block of the one or more OFDM symbols, the multiple beams sent by the network device, according to the one or
  • the PBCH reference signal carried in another type of resource block of the plurality of OFDM symbols demodulates data in one or more OFDM symbols, and simultaneously satisfies beam identification and demodulation of PBCH data, and network device side transmission beam
  • the overhead of the reference signal and the PBCH reference signal is greatly reduced; the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, Guarantee the quality of the detected beam.
  • FIG. 12 is a schematic structural diagram of another network device according to an embodiment of the present invention.
  • the network device 4000 may include a transmitter 41, a receiver 42, a processor 43, and a memory 44, and a transmitter 41 and a receiver. 42.
  • the processor 43 and the memory 44 are connected to the bus 45, respectively.
  • the processor 43 controls the operation of the network device 4000, which may also be referred to as a Central Processing Unit (CPU).
  • Processor 43 may be an integrated circuit chip with signal processing capabilities.
  • the processor 43 can also be a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 44 stores a set of program codes, and the processor 43 is configured to call the program code stored in the memory 44 for performing the following operations:
  • the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the number of ports and/or ports of the reference signals of the plurality of first resource blocks and the plurality of second resource blocks Different numbers;
  • Each of the first resource blocks carries a beam reference signal, where the beam reference signal is used by the terminal device to identify multiple beams sent by the network device; each second resource block carries a physical broadcast channel PBCH reference signal.
  • the reference signal of the PBCH is used to demodulate the PBCH data;
  • the at least one OFDM symbol is transmitted by the transmitter using a transmit beam.
  • one or more OFDM symbols generated and transmitted by the network device are divided into two types of resource blocks, and the beam reference signals are carried by only one type of resource blocks, and the resource blocks can be used as beam identification.
  • the other type of resource block carries the PBCH reference signal, which can be used as the demodulation of the PBCH data, thereby reducing the overhead of transmitting the beam reference signal and the PBCH reference signal while satisfying the beam identification and the demodulation of the PBCH data.
  • the beam reference signal carried in each of the first resource blocks is further used to detect a beam quality of the identified multiple beams in each of the first resource blocks, where each second The PBCH reference signal carried in the resource block is further used by the terminal device to detect a beam quality of the identified multiple beams in each of the second resource blocks.
  • the number of ports of the second resource block is less than the number of ports of the first resource block.
  • the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect a few well-identified waves with better beam quality.
  • the beam quality in the second resource block is bundled such that the number of ports of the second resource block is less than the number of ports of the first resource block, thereby saving signaling overhead in the second resource block.
  • the beam reference signal carried in the first resource block is further used to demodulate PBCH data.
  • the reference signal in the first resource block can also be used as a PBCH reference signal, so that the data of the PBCH can be demodulated.
  • the reference signals in the plurality of first resource blocks are set in at least one of: time division, frequency division, and code division, and reference signals in the plurality of second resource blocks. Set in at least one of the following ways: time division, frequency division, and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various manners, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the at least one OFDM symbol further includes a synchronization signal.
  • the at least one OFDM symbol may include a synchronization signal, such as a primary synchronization signal and/or a secondary synchronization signal, in addition to two types of resource blocks.
  • a synchronization signal such as a primary synchronization signal and/or a secondary synchronization signal
  • the multiple first resource blocks and the multiple second resource blocks are combined into a plurality of third resource blocks, where the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • one or more OFDM symbols generated and transmitted by the network device are divided into two types of resource blocks, and the beam reference signals are carried by only one type of resource blocks, and the resource blocks may be used.
  • the identification of the beam and another type of resource block carries the PBCH reference signal, which can be used as the demodulation of the PBCH data, thereby reducing the transmission beam reference signal and the PBCH reference while satisfying the beam identification and the demodulation of the PBCH data.
  • the overhead of the signal used as the identification of the beam.
  • FIG. 13 is a schematic structural diagram of still another terminal device according to an embodiment of the present invention.
  • the terminal device 5000 may include a transmitter 51, a receiver 52, a processor 53, and a memory 54, a transmitter 51, and a receiver. 52.
  • the processor 53 and the memory 54 are connected to the bus 55, respectively.
  • the processor 53 controls the operation of the terminal device 5000, which may also be referred to as a central processing unit.
  • Processor 53 may be an integrated circuit chip with signal processing capabilities.
  • Processor 53 may also be a general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 54 stores a set of program codes, and the processor 53 is configured to call the program code stored in the memory 54 for performing the following operations:
  • At least one OFDM symbol that the network device transmits by using a transmit beam where the at least one OFDM symbol includes a plurality of first resource blocks and a plurality of second resource blocks, and the plurality of first resource blocks and The port number and/or the port number of the reference signal of the plurality of second resource blocks are different, wherein each of the first resource blocks carries a beam reference signal, and each of the second resource blocks carries a physical broadcast channel PBCH reference signal;
  • the one or more OFDM symbols are divided into two types of resource blocks, and only one type of resource block carries a beam reference signal, and the other type Resource block
  • the PBCH reference signal is carried in the terminal device, and the terminal device identifies multiple beams sent by the network device according to the beam reference signal carried in the resource block, and the PBCH reference signal carried in the other resource block is used in one or more OFDM symbols.
  • the data is demodulated, which can simultaneously satisfy the beam identification and the demodulation of the PBCH data, and the overhead of transmitting the beam reference signal and the PBCH reference signal on the network device side is greatly reduced.
  • processor 53 is further configured to perform the following operations:
  • the terminal device detects, according to the beam reference signal carried in each of the first resource blocks, a beam quality of the identified multiple beams in each of the first resource blocks;
  • the terminal device detects, according to the PBCH reference signal carried in each of the second resource blocks, a beam quality of the identified multiple beams in each of the second resource blocks.
  • the terminal device performs full-band beam quality detection on two types of resource blocks included in one or more OFDM symbols for multiple beams identified by multiple types of resource blocks, thereby ensuring the detected beam. the quality of.
  • the number of ports of the second resource block is less than the number of ports of the first resource block.
  • the terminal device can only receive a few beams in the same polarization, and the beam energy of the port of the reference signal of the second resource block is mainly From the few beams, the reference signal of the second resource block is used to further detect the beam quality of the identified few beams with better beam quality in the second resource block, so that the number of ports of the second resource block is less than The number of ports of the first resource block, thereby further saving signaling overhead in the second resource block.
  • each of the first resource blocks further carries a PBCH reference signal.
  • the reference signal in the first resource block can also be used as a PBCH reference signal, so that the data of the PBCH can be demodulated.
  • the reference signals in the plurality of first resource blocks are set in at least one of: time division, frequency division, and code division, and reference signals in the plurality of second resource blocks. Set in at least one of the following ways: time division, frequency division, and code division.
  • the reference signals in the two types of resource blocks are multiplexed in various manners, and may be any one of time division, frequency division, code division, or a combination of any two or a combination of the three.
  • the at least one OFDM symbol further includes a synchronization signal.
  • one or more OFDM symbols may include synchronization signals, such as primary synchronization signals and/or secondary synchronization signals, in addition to two types of resource blocks.
  • the multiple first resource blocks and the multiple second resource blocks are combined into a plurality of third resource blocks, where the beam reference signal and the The PBCH reference signals are interleaved in the frequency domain.
  • the beam reference signal and the PBCH reference signal can be set in one resource block.
  • a terminal device in a terminal device, one or more OFDM symbols from a network device received by a terminal device, the one or more OFDM symbols are divided into two types of resource blocks, and the beam is carried by only one type of resource block.
  • a reference signal the other type of resource block carries a PBCH reference signal
  • the terminal device identifies, according to the beam reference signal carried in the resource block of the one or more OFDM symbols, the multiple beams sent by the network device, according to the one or
  • the PBCH reference signal carried in another type of resource block of the plurality of OFDM symbols demodulates data in one or more OFDM symbols, and simultaneously satisfies beam identification and demodulation of PBCH data, and network device side transmission beam
  • the overhead of the reference signal and the PBCH reference signal is greatly reduced.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include a random access memory (RAM), a read-only memory (ROM), and an electrically erasable programmable read-only memory (Electrically Erasable Programmable).
  • EEPROM Electrically Error Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, Then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium.
  • DSL Digital Subscriber Line
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

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Abstract

La présente invention se rapporte, selon divers modes de réalisation, à un procédé et à un dispositif adaptés à l'envoi et à la réception d'un symbole OFDM. Le procédé comprend les étapes suivantes : un dispositif réseau génère au moins un symbole OFDM, le ou les symboles OFDM comprenant de multiples premiers blocs de ressources et de multiples seconds blocs de ressources, la quantité de ports et/ou les nombres de ports des signaux de référence des multiples premiers blocs de ressources étant différents de la quantité de ports et/ou des nombres de ports des signaux de référence des multiples seconds blocs de ressources, chaque premier bloc de ressources portant un signal de référence de faisceau, et chaque second bloc de ressources portant un signal de référence PBCH ; le dispositif réseau envoie le ou les symboles OFDM à l'aide d'un faisceau d'envoi ; un dispositif terminal identifie, à l'aide du signal de référence de faisceau porté par chaque premier bloc de ressources, de multiples faisceaux envoyés par le dispositif réseau ; et le dispositif terminal démodule les données présentes dans le ou les symboles OFDM selon le signal de référence PBCH. Les modes de réalisation de la présente invention peuvent permettre l'identification de faisceaux et la démodulation de données PBCH, et les surdébits pour la transmission des signaux de référence de faisceau et des signaux de référence PBCH par le côté dispositif réseau sont considérablement réduits.
PCT/CN2017/114430 2016-12-29 2017-12-04 Procédé et dispositif pour l'envoi et la réception d'un symbole ofdm WO2018121186A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611247737.9 2016-12-29
CN201611247737.9A CN108259147B (zh) 2016-12-29 2016-12-29 Ofdm符号的发送、接收方法及装置

Publications (1)

Publication Number Publication Date
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