WO2019109484A1 - La présente invention concerne un procédé et un dispositif de communication - Google Patents

La présente invention concerne un procédé et un dispositif de communication Download PDF

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Publication number
WO2019109484A1
WO2019109484A1 PCT/CN2018/073486 CN2018073486W WO2019109484A1 WO 2019109484 A1 WO2019109484 A1 WO 2019109484A1 CN 2018073486 W CN2018073486 W CN 2018073486W WO 2019109484 A1 WO2019109484 A1 WO 2019109484A1
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WO
WIPO (PCT)
Prior art keywords
beam direction
terminal
base station
random access
signal
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Application number
PCT/CN2018/073486
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English (en)
Chinese (zh)
Inventor
李伟丹
黄锦华
杨波
胡应添
Original Assignee
京信通信系统（中国）有限公司
京信通信系统（广州）有限公司
京信通信技术(广州)有限公司
天津京信通信系统有限公司
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Application filed by 京信通信系统（中国）有限公司, 京信通信系统（广州）有限公司, 京信通信技术(广州)有限公司, 天津京信通信系统有限公司 filed Critical 京信通信系统（中国）有限公司
Publication of WO2019109484A1 publication Critical patent/WO2019109484A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present application relates to the field of mobile communications technologies, and in particular, to a communication method and apparatus.
  • a method for improving spectrum efficiency is a multi-antenna technology, that is, a plurality of antennas are configured for a base station. Since different service data required by different user terminals in a cell of a base station are different, the base station can perform beamforming on data carried by the traffic channel (Beam Forming) , BF), obtain the traffic channel beams of different user terminals, and then use multiple antennas to transmit the traffic channel beam direction to each user terminal, effectively utilizing the spatial irrelevance of the channel.
  • Beam Forming Beam Forming
  • the complexity is high, and the base station and the terminal cannot adaptively align the beam, so that the interference in the common frequency or the pre-frequency spectrum of the covered cell and the surrounding area is severe, and the spectrum quality is poor.
  • the embodiments of the present invention provide a communication method and device, which are used to implement adaptive beam alignment between a base station and a terminal, reduce the complexity of base station beamforming, reduce signal transmission interference of the base station, and improve spectrum quality.
  • An embodiment of the present application provides a method for communication, where the method includes:
  • the terminal receives M training signals sent by the base station in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N;
  • the terminal sends a first random access message to the base station in a first beam direction; the terminal receives a first random access response message sent by the base station in the first beam direction.
  • the terminal determines the first beam direction according to the M training signals, including:
  • the terminal determines a beam direction with the best average signal quality among the N beam directions as the first beam direction.
  • the terminal determines, according to the M training signals, an average signal quality of each of the N beam directions, including:
  • the terminal determines an average or a weighted average of the k signal qualities as an average signal quality or a weighted average signal quality of the corresponding beam direction.
  • the terminal determines the first beam direction according to the M training signals, including:
  • the signal quality is determined according to any one of a received power, a signal to noise ratio, and a carrier to noise ratio of the training signal.
  • the method further includes:
  • the terminal sends an uplink data packet to the base station in the first beam direction; or the terminal receives the downlink data packet sent by the base station in the first beam direction.
  • the method further includes:
  • the terminal still does not receive the first random access response message of the base station after repeatedly transmitting the first random access message F times, and then reselects the base station access, where the F is a positive integer greater than 1.
  • the method further includes:
  • the terminal determines that the second beam direction is different from the first beam direction, the terminal sends a second random access message to the base station in the second beam direction; or
  • the terminal determines that the second beam direction is different from the first beam direction, and the signal quality of the first beam direction is less than a preset threshold, the terminal sends a second random in the second beam direction.
  • the terminal receives the second random access response message sent by the base station in the second beam direction.
  • An embodiment of the present application provides a method for communication, where the method includes:
  • M training signals sent by the base station in the N beam directions; the M, N are positive integers greater than 1, and M is greater than or equal to N;
  • the base station sends a first random access response message to the terminal in the first beam direction.
  • the method further includes:
  • the base station sends a downlink data packet to the terminal in the first beam direction.
  • the beam direction of the first random access message is the same as the beam direction of the training sequence of the radio frame where the first random access message is located.
  • each of the M training signals includes a transmission frame number of the training signal, and a frame number of the initial transmission radio frame corresponding to the beam direction of the training signal and a continuous frame number of the corresponding beam direction of the training signal.
  • the method further includes:
  • the base station determines that the second beam direction is different from the first beam direction, sending a second random access response message to the terminal in the second beam direction, and in the second beam direction Data transmission with the terminal.
  • An embodiment of the present application provides a device for communication, where the device includes:
  • the transceiver unit is configured to receive M training signals sent by the base station in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N;
  • a processing unit configured to determine a first beam direction according to the M training signals
  • the transceiver unit is configured to send a first random access message to the base station in a first beam direction, where the transceiver unit is further configured to receive, in the first beam direction, a first random Access response message.
  • processing unit is specifically configured to:
  • processing unit is specifically configured to:
  • processing unit is specifically configured to:
  • the signal quality is determined according to any one of a received power, a signal to noise ratio, and a carrier to noise ratio of the training signal.
  • the transceiver unit is specifically configured to:
  • the transceiver unit if the transceiver unit does not receive the first random access response message within a preset time threshold, resending the first random access message;
  • the processing unit reselects the base station access, where the F is A positive integer greater than one.
  • processing unit is specifically configured to:
  • the frame number of the radio frame where the K training signals are located is after the frame number of the radio frame where the M training signals are located;
  • the transceiver unit is configured to send a second random access message to the base station in the second beam direction; in the second beam direction. Receiving a second random access response message sent by the base station; or
  • the transceiver unit is configured to send a second random in the second beam direction. And accessing the message; receiving, in the second beam direction, a second random access response message sent by the base station.
  • An embodiment of the present application provides a device for communication, where the device includes:
  • a transceiver unit configured to transmit M training signals in N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N; the first random access message sent by the receiving terminal;
  • a processing unit configured to determine a beam direction of the first random access message as a first beam direction of the terminal
  • the transceiver unit is configured to send a first random access response message to the terminal in the first beam direction.
  • the transceiver unit is configured to receive an uplink data packet sent by the terminal in the first beam direction, or send a downlink to the terminal in the first beam direction. Data message.
  • the beam direction of the first random access message is the same as the beam direction of the training sequence of the radio frame where the first random access message is located.
  • each of the M training signals includes a transmission frame number of the training signal, and a frame number of the initial transmission radio frame corresponding to the beam direction of the training signal and a continuous frame number of the corresponding beam direction of the training signal.
  • the transceiver unit is further configured to receive a second random access message sent by the terminal;
  • the processing unit is configured to determine a beam direction corresponding to the second random access message as a second beam direction of the terminal; if it is determined that the second beam direction is different from the first beam direction, The transceiver unit sends a second random access response message to the terminal in the second beam direction, and performs data transmission with the terminal in the second beam direction.
  • the embodiment of the present application provides a computer program product, comprising computer readable instructions, when a computer reads and executes the computer readable instructions, such that the computer performs the method of any one of the above.
  • the embodiment of the present application provides a chip connected to a memory for reading and executing a software program stored in the memory to implement the methods in various possible designs in any of the above.
  • the embodiment of the present application provides a computer program product, comprising computer readable instructions, when a computer reads and executes the computer readable instructions, such that the computer performs the method of any one of the above.
  • the embodiment of the present application provides a chip connected to a memory for reading and executing a software program stored in the memory to implement the methods in various possible designs in any of the above.
  • Embodiments of the present application provide a communication apparatus having a function of a network device or a terminal behavior in a method for implementing any of the foregoing communications, including steps or functions described in a method for performing any of the foregoing communications.
  • the steps or functions may be implemented by software, or by hardware, or by a combination of hardware and software.
  • the communication device described above includes one or more processors and transceiver units.
  • the one or more processors are configured to support the communication device to perform corresponding functions in the methods described above. For example, a synchronization signal is generated.
  • the transceiver unit is configured to support the communication device to communicate with other devices to implement a receiving/transmitting function. For example, a synchronization signal generated by the processor or the like is transmitted.
  • the communication device may further include one or more memories for coupling with the processor, which store program instructions and data necessary for the communication device.
  • the one or more memories may be integrated with the processor or may be separate from the processor, and the present application is not limited thereto.
  • the communication device may be a base station or a Transmission Reception Point (TRP), etc.
  • the communication unit may be a transceiver or a transceiver circuit.
  • the communication device may also be a communication chip that can be disposed in the network device.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the communication device may be a terminal, and the terminal may be a cellular phone, a handheld terminal, a notebook computer or other devices that can access the network, a drone device, a smart home device, an in-vehicle device, etc., and the communication unit may be Transceiver, or transceiver circuit.
  • the communication device may also be a communication chip that can be disposed in the terminal.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the above communication device includes a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device performs the network device or terminal completion in any of the above-described synchronization signal transmission methods Methods.
  • the terminal receives M training signals sent by the base station in the N beam directions; the N is an integer greater than 1; the M and N are positive integers greater than 1, and M is greater than or equal to N; Determining, by the terminal, the first beam direction according to the M training signals; the terminal transmitting a first random access message to the base station in a first beam direction; the terminal receiving the first beam direction in the first beam direction The first random access response message sent by the base station.
  • the technical solution in the embodiment of the present application implements adaptive beam alignment between the base station and the terminal, effectively reduces beamforming complexity and system overhead, reduces signal transmission interference in the internal or surrounding spectrum of the cell, and improves spectrum quality.
  • FIG. 1 is a schematic flowchart diagram of a method for communication according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a communication method in a specific embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a communication device in a specific embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a communication device in a specific embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication apparatus in a specific embodiment of the present application.
  • the network side device is, for example, a base station.
  • the user equipment may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network).
  • the wireless terminal can also be referred to as a system, a Subscriber Unit, a Subscriber Station, and a mobile terminal. Mobile Station, Mobile, Remote Station, Access Point, Remote Terminal, Access Terminal, User Terminal, User User Agent, User Device, or User Equipment.
  • a base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE. This application is not limited.
  • the base station may include an antenna array composed of multiple antenna elements.
  • the shape of the radiation pattern of the RF signal emitted by the antenna array can be adjusted, so that the signal in a specific direction can be transmitted to the terminal according to the specific orientation of the terminal.
  • Directional signals to reduce interference may be adjusted.
  • beamforming is mainly performed on both the base station side and the terminal side.
  • the base station sends a downlink beam training signal
  • the terminal measures the downlink beam training signal, selects the best base station transmit beam, and feeds the beam related information to the base station, and simultaneously selects the corresponding optimal receive beam, and saves it locally.
  • the terminal sends an uplink beam training signal
  • the base station measures the uplink beam training signal, selects the best terminal transmission beam, transmits the beam-related information to the terminal, and selects the corresponding optimal receiving beam, and saves it locally.
  • Data transmission can be performed after the uplink and downlink transmit and receive beams are trained.
  • the best transmit beam and the receive beam are selected, and the base station frequently needs to send the training signal to the terminal to complete the uplink and downlink transmit and receive beam training.
  • the complexity of the beamforming and the system overhead are large, which causes unnecessary Waste of resources.
  • only the best transmit beam and receive beam are selected, but the spatial independence between the selected transmit beam and the receive beam is not considered, and the reliability of data transmission is low.
  • a method for communication provided by the embodiment of the present application, as shown in FIG. 1 , includes the following steps:
  • Step 101 The terminal determines a first beam direction according to the M training signals.
  • Step 102 The terminal sends a first random access message to the base station in a first beam direction.
  • Step 103 The terminal receives a first random access response message sent by the base station in the first beam direction.
  • one or more terminals may be included in the coverage of the base station, and the base station may communicate with any terminal in the coverage of the base station by performing the method flow in the foregoing steps 101 to 106.
  • the base station transmits M training signals in N beam directions; wherein, M, N are positive integers greater than 1, and M is greater than or equal to N.
  • the base station sends M training signals in N beam directions, and at least one training signal is sent in each beam direction.
  • the specific content of the training signal is not limited in this embodiment.
  • the training signal may be a pilot signal, or may be a cell reference signal, and the details are not described herein.
  • the base station may send according to the following manner:
  • the M training signals corresponding to the N beam directions may be sent in a polling manner.
  • the frame number of the beam direction and the continuous frame number of the beam direction may be sent for the first time. Determine according to actual needs.
  • Each of the M training signals includes a transmission frame number of the training signal, and a frame number of the first transmission radio frame corresponding to the beam direction of the training signal and a continuous frame number corresponding to the beam direction of the training signal.
  • the base station can transmit the training signal to the three beam directions, and the training signal to the K+1 frame training signal is transmitted from the beam direction 1 in the Kth frame, and the training signal to the K+5 frame training signal in the K+2 frame.
  • the beam direction 2 is transmitted, and the training signal from the K+6th frame to the K+9th frame is transmitted from the beam direction 3.
  • the number of consecutive frames in the beam direction 1 is 2 frames
  • the number of consecutive frames in the beam direction 2 is 4 frames
  • the number of consecutive frames in the beam direction 3 is 4 frames.
  • the frame number of the first transmission in the beam direction 1 is the Kth frame
  • the number of the continuous frame is 2 frames
  • the frame number of the first transmission in the beam direction 2 is The K+2 frame has a continuous frame number of 4 frames
  • the frame number of the first transmission in the beam direction 3 is the K+6 frame
  • the continuous frame number is 4 frames
  • the beam direction of the current frame K+3 frame can be determined as the beam direction 2 And a beam direction corresponding to the M training signals.
  • the base station sends M training signals in the N beam directions, so that the terminal can determine the N beam directions of the base station and the frame numbers of the radio frames in which the N beam directions are located according to the M training signals. And the terminal determines, by using the received signal quality of the M training signals, an optimal beam direction of the terminal to access the base station.
  • the terminal determines, according to the M training signals, a first beam direction, including:
  • Step 1 The terminal determines an average signal quality of each of the N beam directions according to the M training signals.
  • Step 2 The terminal determines a beam direction with the best average signal quality among the N beam directions as the first beam direction.
  • a possible implementation manner includes the following steps:
  • Step 1 The terminal determines, according to the M training signals, a frame number that is initially transmitted in each of the N beam directions and each of the N beam directions from the M training signals. Number of consecutive frames;
  • Step 2 The terminal determines a training signal corresponding to each beam direction according to a frame number initially transmitted in each of the N beam directions and a continuous frame number in each of the N beam directions. Signal quality;
  • the terminal determines k signal qualities corresponding to k training signals, where the k training signals are the M training signals, and the terminal is from the The training signal received in the beam direction, k is greater than 0 and less than M.
  • Step 3 Determine the average signal quality of each beam direction according to the signal quality of the training signal in each beam direction.
  • step 3 in a possible implementation manner, the terminal determines an average value of the k signal qualities as an average signal quality of the beam direction.
  • the signal quality is determined according to any one or any of a received power, a signal to noise ratio, and a carrier-to-interference ratio of the training signal.
  • the signal quality is the received power of the received training signal, or the signal quality is the signal-to-noise ratio of the received training signal, or the signal quality is the carrier-to-noise ratio of the received training signal, or the signal quality is received.
  • the weighting values of at least two of the received power, the signal-to-noise ratio, and the carrier-to-interference ratio of the training signal are not described herein.
  • the signal quality is taken as an example of the received power of the received training signal. If the received power of the three training signals in the beam direction 2 received by the terminal are: 6 mW, 4 mW, 7 mW, 8 mW, the average received power of the beam direction 2 is 6.25 mW, based on this. Then, it can be determined that the signal quality corresponding to each beam direction is 6.25 mW.
  • step three one possible implementation includes:
  • the terminal determines k signal qualities corresponding to k training signals and frame numbers of radio frames of k training signals.
  • the terminal For the training signal of the k training signals, the terminal weights the signal quality of the training signal by using a weighting value corresponding to the frame number of the radio frame of the training signal, to obtain a weighted signal quality of the training signal.
  • the terminal determines a weighted average of the k signal qualities as a weighted average signal quality of the beam direction, where the k training signals are received by the terminal from the beam direction in the M training signals Training signal, k is greater than 0 and less than M.
  • the signal quality is taken as an example of the received power of the received training signal. If the received power of the four training signals in the beam direction 2 received by the terminal is: the received power of the K+2 frame is 6 milliwatts, and the received power of the K+3 frame is 4 milliwatts, the K+4 The received power of the frame is 7 mW, and the received power of the K+5 frame is 5 mW.
  • the average signal quality of the beam direction 2 can be determined according to the weighted average. For example, the weight of the K+2 frame is 0.1.
  • the weighted value of the K+3 frame is 0.2, the weight of the K+2 frame is 0.3, and the weight of the K+2 frame is 0.4, and the weighted average signal quality of the beam direction 2 is 5.5 milliwatts. Based on the same manner, the weighted average signal quality corresponding to each beam direction in the N beam directions can be determined.
  • a possible implementation manner includes:
  • Step 1 The terminal determines the signal quality of the training signal corresponding to each beam direction according to the first transmitted frame number and the continuous frame number corresponding to each beam direction of the N beam directions.
  • the terminal may perform one-by-one analysis according to the received M training signals to determine signal quality of the M training signals.
  • Step 2 The terminal determines the first beam direction according to the signal quality of the M training signals.
  • a possible implementation manner may include:
  • the signal quality may specifically be a received power value. If the terminal receives 4 training signals, the received power of the first training signal is 6 milliwatts, the receiving power of the second training signal is 4 milliwatts, and the third training signal The received power of the fourth training signal is 8 milliwatts, and the terminal uses the beam direction corresponding to the fourth training signal as the first beam direction.
  • the signal quality may specifically be any one of a received power, a signal to noise ratio, a carrier to interference ratio, or any combination.
  • step 102 after determining the first beam direction, the terminal sends a first random access message in the first beam direction.
  • the specific implementation process is as follows:
  • the terminal after determining, by the terminal, the first beam direction, the terminal sends a first random access message to the base station in a first beam direction.
  • the first random access message may be a first message sent by the terminal association process, the re-association process, the initial access process, and the re-access procedure to the base station.
  • the frame corresponding to the training signal is used as the The moment when the terminal sends the first random access message to the base station.
  • the signal quality is specifically a received power value. If the terminal receives 4 training signals, the received power of the first training signal is 6 milliwatts, the receiving power of the second training signal is 4 milliwatts, and the third training signal The received power of the fourth training signal is 8 milliwatts, and the terminal uses the beam direction corresponding to the fourth training signal as the first beam direction.
  • the frame where the fourth training signal is located is the Kth frame, and the K+L*n frame is used as the moment when the terminal sends the first random access message to the base station.
  • the L is a continuous frame number in which the base station transmits a complete beam direction, and n is a positive integer greater than or equal to zero.
  • the terminal determines an average signal quality of each of the N beam directions according to the M training signals, the terminal averages an average signal quality among the N beam directions.
  • the good beam direction is determined as the first beam direction, and the terminal may send the frame corresponding to any training signal in the continuous frame number corresponding to the first beam direction as the terminal to send the first to the base station. The moment of random access to the message; or,
  • the terminal may use, as the time when the terminal sends the first random access message to the base station, the frame corresponding to the training signal with the best signal quality among the k training signals in the first beam direction.
  • the terminal takes the signal quality as the received power of the received training signal, if the received power of the training signal of the beam direction 2 received by the terminal is: 6 milliwatts, 4 milliwatts, 7 milliwatts, 8 milliwatts.
  • the average received power of beam direction 2 is 6.25 mW. If it is determined that the average signal quality of the beam direction 2 is the best among the N beam directions, any one of the K+2+L*n frame to the K+5+L*n frame may be used as the The moment when the terminal sends the first random access message to the base station.
  • the terminal uses a frame of the training signal corresponding to 8 milliwatts as a time when the terminal sends the first random access message to the base station.
  • the L is a continuous frame number in which the base station transmits a complete beam direction, and n is a positive integer greater than or equal to 0.
  • the manner in which the terminal determines the weighted average signal quality of the beam direction is that for any one of the N beam directions, the terminal weights the k signal quality in any one of the beam directions.
  • the average value is determined as the average signal quality of the beam direction, and the frame time of the corresponding training signal with the best weighted signal quality in the determined first beam direction is used as the terminal to send the first random access to the base station. The moment of the message.
  • the received power of the training signal of the beam direction 2 received by the terminal is: the received power of the training signal of the K+2 frame is 6 milliwatts.
  • the receiving power of the K+3 frame training signal is 4 milliwatts
  • the receiving power of the K+4 frame training signal is 7 milliwatts
  • the receiving power of the K+5 frame training signal is 5 milliwatts.
  • the K+5+L*n frame is used as the time when the terminal sends the first random access message to the base station.
  • the L is a continuous frame number in which the base station transmits a complete beam direction
  • n is a positive integer greater than or equal to 0.
  • the base station receives the first random access message sent by the terminal, and determines a beam direction of the first random access message as a first beam direction of the terminal; Sending a first random access response message to the terminal in the first beam direction.
  • the first beam direction that is determined by the terminal is sent to the base station in the manner of the first random access message, so that the base station sends the first beam of the first random access message.
  • the direction is determined as the beam direction of the terminal, so that the base station does not need to frequently set the beam direction for the terminal, which effectively reduces the complexity and system overhead of beamforming.
  • the beam direction of the first random access message is the same as the beam direction of the training sequence of the radio frame where the first random access message is located. Therefore, the base station may determine, according to a beam direction where the first random access message is located, a beam direction in which the terminal selects to access the base station.
  • the base station confirms that the terminal may access the base station in a first beam direction where the first random access message is located, and send the The first random access response message.
  • step 103 after receiving the first random access response message, the base station establishes a communication process with the terminal, and performs data transmission with the base station in the first beam direction. Send and receive data packets.
  • the terminal determines, according to the M training signals, the N beam directions of the base station and the frame number of the radio frame where the N beam directions are located; and the terminal passes the received signals of the M training signals. Quality, determining an optimal beam direction of the terminal; and transmitting a first random access message in the optimal beam direction, the base station receiving the first random access message by receiving the first random access message sent by the terminal.
  • the beam direction of the incoming message is determined to be the first beam direction of the terminal, and it is determined that the terminal communicates with the base station in the first beam direction.
  • the adaptive beam alignment between the base station and the terminal is implemented, so that the base station does not need to frequently set the beam direction for the terminal, effectively reduces the beamforming complexity and system overhead, reduces signal transmission interference in the internal or surrounding spectrum of the cell, and improves the spectrum. quality.
  • the method further includes:
  • the base station sends a downlink data packet to the terminal in the first beam direction.
  • the base station may determine, according to a beam direction corresponding to the first random access message sent by the terminal, a beamforming parameter corresponding to the first beam direction.
  • the beamforming parameter is specifically a weighting coefficient of amplitude and/or phase of a signal transmitted by each antenna element when the base station performs beamforming on the terminal. Since the method of calculating the beamforming parameters belongs to the prior art, the calculation process will not be specifically described herein.
  • the base station performs beamforming on the downlink data of the terminal according to the beamforming parameter of the terminal, and sends the beamformed downlink data to the terminal.
  • a possible implementation manner is: the base station performs beamforming on the downlink data of the terminal according to the beamforming parameter of the terminal, and performs discrete Fourier transform and cyclic prefix addition processing to form a base station.
  • the multi-antenna data matched by each antenna is sent, and the processed downlink data packet of the terminal is sent to the terminal.
  • the method further includes:
  • the terminal sends an uplink data packet to the base station in the first beam direction.
  • the method further includes:
  • the terminal still does not receive the first random access response message of the base station after repeatedly transmitting the first random access message F times, and then reselects the base station access; the F is greater than 1.
  • the preset time threshold may be determined according to actual application scenarios and actual needs.
  • the method for the terminal to reselect the access of the base station may re-initiate the access according to a preset condition until the system selects another base station to access the service, where the preset condition includes a backoff time window length and a random factor.
  • the preset condition includes a backoff time window length and a random factor.
  • the terminal after the base station sends the first random access response message to the terminal in the first beam direction, the terminal receives the M training signals in the N beam directions, if the terminal determines that the beam direction corresponding to the best signal quality changes, the random access message is sent to the base station again in the beam direction corresponding to the best signal quality.
  • Step 1 The terminal determines a second beam direction according to the K training signals sent by the received N beam directions.
  • the frame number of the radio frame where the K training signals are located is in the radio frame where the M training signals are located. After the frame number; the K is a positive integer greater than one;
  • the method for determining the second beam direction is the same as the method for determining the first beam direction, and details are not described herein again.
  • Step 2 If the terminal determines that the beam direction corresponding to the best signal quality changes, the terminal sends a random access message to the base station in the reselected beam direction.
  • the terminal determines that the second beam direction is different from the first beam direction, sending, by the terminal, the second random access message in the second beam direction;
  • the terminal determines that the second beam direction is different from the first beam direction, and the signal quality of the first beam direction is less than a preset threshold, the terminal is in the foregoing Sending a second random access message in the direction of the two beams;
  • the preset threshold may be determined according to an actual application scenario and actual needs.
  • Step 3 The terminal sends a second random access message.
  • Step 4 The base station determines a beam direction corresponding to the second random access message as a second beam direction of the terminal, and sends a second random access to the terminal in the second beam direction.
  • Step 5 The terminal receives the second random access response message, and performs data transmission with the base station in the second beam direction.
  • the terminal sends the determined optimal beam direction to the base station in a random access message manner, so that the base station determines the beam direction of the random access message as the beam direction of the terminal.
  • the base station is not required to frequently set the beam direction for the terminal, which effectively reduces the complexity and system overhead of beamforming.
  • the embodiment of the present application provides a schematic diagram of a communication method.
  • the base station in the communication method includes two beam directions, a beam direction 1 and a beam direction 2.
  • a possible implementation manner, the terminal 0 accessing the base station includes the following steps:
  • Step 1 The base station sends three training signals in two beam directions in a broadcast manner
  • Step 2 The terminal 0 determines that the base station includes the beam direction 1 and the beam direction 2 according to any one of the three training signals received in the two beam directions, and the frame number of the first transmission of the beam direction 1 is the first K frame, the number of consecutive frames is 1 frame; the frame number of the first transmission of beam direction 2 is the K+1 frame, and the number of continuous frames is 2 frames;
  • Step 3 The terminal 0 determines the first beam direction according to the signal quality of the three training signals.
  • Step 4 Terminal 0 sends a first random access message to the base station in the first beam direction.
  • the terminal 0 determines that the three training signals are a first training signal, a second training signal, and a third training signal.
  • the first training signal corresponds to the beam direction 1 and corresponds to the Kth frame;
  • the second training signal corresponds to the beam direction 2, corresponding to the K+1 frame;
  • the third training signal corresponds to the beam direction 2, corresponding to the K+2 frame.
  • the beam direction 1 is determined as the first beam direction, and the first random access message is sent to the base station on the K+3n frame, where n is A positive integer greater than or equal to 0.
  • terminal 0 determines that the average signal quality of the second training signal and the third training signal of the beam direction 2 is greater than the signal quality of the first training signal corresponding to the beam direction 1, the terminal may be at the K+1+3n frame or the K+2 Sending a first random access message to the base station on a +3n frame; or if determining an average signal quality of the second training signal and the third training signal in the beam direction 2 is greater than a signal quality of the first training signal corresponding to the beam direction 1 And determining that the signal quality of the second training signal is greater than the signal quality of the third training signal, sending the first random access message to the base station on the K+2+3n frame.
  • the terminal 0 determines that the average signal quality of the second training signal and the third training signal in the beam direction 2 is greater than the weighted signal quality of the first training signal corresponding to the beam direction 1, and the weighted signal quality of the two training signals in the beam direction 2
  • the value is the maximum of the K+2 frame, and the terminal 0 sends the first random access message to the base station on the K+2+3n frame.
  • Step 5 The base station receives a random access message sent by the terminal 0 in the first beam direction.
  • Step 6 The base station sends a random access response message to the terminal 0 in the first beam direction.
  • the base station performs beamforming processing on the downlink data of each terminal according to the beamforming parameters of each terminal calculated in the foregoing manner to form multi-antenna data, and only transmits in the downlink channel corresponding to the first beam direction. Common channel and downlink data of terminal 0.
  • Step 7 If terminal 0 receives the first random access response message sent by the base station in the first beam direction, step 8 is performed; if terminal 0 does not receive the first time within a preset time threshold Retrieving the first random access message by using the random access response message; the terminal 0 still does not receive the first random access response message of the base station after repeatedly transmitting the first random access message F times. Then reselect the base station access.
  • Step 8 Terminal 0 performs data transmission with the base station in the first beam direction.
  • Step 9 The terminal 0 determines the second beam direction according to the K training signals sent by the received N beam directions.
  • Step 10 If the terminal 0 determines that the second beam direction is different from the first beam direction, the terminal 0 sends a second random access message in the second beam direction; or, if the terminal 0 determines the second The beam direction is different from the first beam direction, and the signal quality of the first beam direction is less than a preset second threshold, and the terminal 0 sends the second random access message in the second beam direction.
  • Step 11 The base station receives the second random access message sent by the terminal 0, determines a beam direction corresponding to the second random access message as a second beam direction of the terminal 0, and is in the second beam. The direction sends a second random access response message to the terminal 1.
  • Step 12 The terminal 0 and the base station perform data transmission in the second beam direction.
  • the terminal 1 accessing the base station includes the following steps:
  • Step 1 The base station sends three training signals in two beam directions in a broadcast manner
  • Step 2 The terminal 1 determines, according to any one of the three training signals received in the two beam directions, that the base station includes the beam direction 1 and the beam direction 2, and the frame number of the first transmission of the beam direction 1 is the first K frame, the number of consecutive frames is 1 frame; the frame number of the first transmission of beam direction 2 is the K+1 frame, and the number of continuous frames is 2 frames;
  • Step 3 The terminal 1 determines the first beam direction according to the signal quality of the three training signals.
  • Step 4 The terminal 1 sends a first random access message to the base station in the first beam direction.
  • the terminal 1 determines that the three training signals are a first training signal, a second training signal, and a third training signal.
  • the first training signal corresponds to the beam direction 1 and corresponds to the Kth frame;
  • the second training signal corresponds to the beam direction 2, corresponding to the K+1 frame;
  • the third training signal corresponds to the beam direction 2, corresponding to the K+2 frame.
  • the beam direction 2 is determined as the first beam direction, and the first random access message is sent to the base station on the K+3+3n frame, n is a positive integer greater than or equal to zero.
  • the terminal 1 may be in the K+1+3n frame or the K+2 Sending a first random access message to the base station on a +3n frame; or if determining an average signal quality of the second training signal and the third training signal in the beam direction 2 is greater than a signal quality of the first training signal corresponding to the beam direction 1 And determining that the signal quality of the second training signal is greater than the signal quality of the third training signal, sending the first random access message to the base station on the K+2+3n frame.
  • the terminal 1 determines that the average signal quality of the second training signal and the third training signal in the beam direction 2 is greater than the weighted signal quality of the first training signal corresponding to the beam direction 1, and the weighted signal quality of the two training signals in the beam direction 2
  • the value is the maximum of the K+2 frame, and the terminal 1 transmits the first random access message to the base station on the K+2+3n frame.
  • Step 5 The base station receives, in the first beam direction, a random access message sent by the terminal 1;
  • Step 6 The base station sends a random access response message to the terminal 1 in the first beam direction.
  • the base station performs beamforming processing on the downlink data of each terminal according to the beamforming parameters of each terminal calculated in the foregoing manner to form multi-antenna data, and only transmits in the downlink channel corresponding to the first beam direction. Common channel and downlink data of terminal 0.
  • Step 7 If the terminal 1 receives the first random access response message sent by the base station in the first beam direction, step 8 is performed; if the terminal 1 does not receive the first time within a preset time threshold Retrieving the first random access message by using the random access response message; the terminal 1 still does not receive the first random access response message of the base station after repeatedly transmitting the first random access message F times. Then reselect the base station access.
  • Step 8 The terminal 1 performs data transmission with the base station in the first beam direction.
  • Step 9 The K training signals sent by the N beam directions received by the terminal 1 determine the second beam direction.
  • Step 10 If the terminal 1 determines that the second beam direction is different from the first beam direction, the terminal 1 sends a second random access message in the second beam direction; or, if the terminal 1 determines the second The beam direction is different from the first beam direction, and the signal quality of the first beam direction is less than a preset second threshold, and the terminal 1 sends a second random access message in the second beam direction.
  • Step 11 The base station receives a second random access message sent by the terminal 1, and determines a beam direction corresponding to the second random access message as a second beam direction of the terminal 1, and in the second beam. The direction sends a second random access response message to the terminal 1.
  • Step 12 The terminal 1 and the base station perform data transmission in the second beam direction.
  • the embodiment of the present application provides a device for communication, where the device includes:
  • the transceiver unit 301 is configured to receive M training signals sent by the base station in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N;
  • the processing unit 302 is configured to determine a first beam direction according to the M training signals
  • the transceiver unit 301 is configured to send a first random access message to the base station in a first beam direction, where the transceiver unit is further configured to receive, in the first beam direction, a first random connection sent by the base station In response message.
  • processing unit 302 is specifically configured to:
  • processing unit 302 is specifically configured to:
  • processing unit 302 is specifically configured to:
  • the signal quality is determined according to any one of a received power, a signal to noise ratio, and a carrier to noise ratio of the training signal.
  • the transceiver unit 301 is configured to send an uplink data packet to the base station in the first beam direction, or receive a downlink data packet sent by the base station in the first beam direction. Text.
  • the transceiver unit 301 resends the first random access message if the first random access response message is not received within a preset time threshold.
  • the transceiver unit 301 does not receive the first random access response message of the base station after repeatedly transmitting the first random access message F times, and the processing unit 302 reselects the base station access, where the F is greater than 1. Positive integer.
  • processing unit 302 is specifically configured to:
  • the frame number of the radio frame where the K training signals are located is after the frame number of the radio frame where the M training signals are located;
  • the transceiver unit 301 is configured to send a second random access message to the base station in the second beam direction; in the second beam direction. Receiving a second random access response message sent by the base station; or
  • the transceiver unit 301 is configured to send a second random connection in the second beam direction. And receiving a second random access response message sent by the base station in the second beam direction.
  • an embodiment of the present application provides a device for communication, where the device includes:
  • the transceiver unit 401 is configured to transmit M training signals in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N; the first random access message sent by the receiving terminal;
  • the processing unit 402 is configured to determine a beam direction of the first random access message as a first beam direction of the terminal;
  • the transceiver unit 401 is configured to send a first random access response message to the terminal in the first beam direction.
  • the transceiver unit 401 is specifically configured to:
  • the beam direction of the first random access message is the same as the beam direction of the training sequence of the radio frame where the first random access message is located.
  • each of the M training signals includes a transmission frame number of the training signal, and a frame number of the initial transmission radio frame corresponding to the beam direction of the training signal and a continuous frame number of the corresponding beam direction of the training signal.
  • the transceiver unit 401 is further configured to receive a second random access message sent by the terminal;
  • the processing unit 402 is configured to determine a beam direction corresponding to the second random access message as a second beam direction of the terminal, and if the second beam direction is determined to be different from the first beam direction, send and receive The unit 401 sends a second random access response message to the terminal in the second beam direction, and performs data transmission with the terminal in the second beam direction.
  • the terminal determines, according to the M training signals, the N beam directions of the base station and the frame number of the radio frame where the N beam directions are located; and the terminal passes the received signals of the M training signals. Quality, determining an optimal beam direction of the terminal; and transmitting a first random access message in the optimal beam direction, the base station receiving the first random access message by receiving the first random access message sent by the terminal.
  • the beam direction of the incoming message is determined to be the first beam direction of the terminal, and it is determined that the terminal communicates with the base station in the first beam direction.
  • the base station When the optimal beam direction determined by the terminal is changed, the base station is notified to adjust the beam direction of the terminal access to the beam direction where the second random access message is located by sending the second random access message, that is, the The optimal beam direction determined by the terminal.
  • the adaptive beam alignment between the base station and the terminal is implemented, so that the base station does not need to frequently set the beam direction for the terminal, effectively reduces the beamforming complexity and system overhead, reduces signal transmission interference in the internal or surrounding spectrum of the cell, and improves the spectrum. quality.
  • an embodiment of the present application provides a device for communication, where the device includes:
  • the transceiver 501 is configured to receive M training signals that are sent by the base station in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N;
  • the processor 502 is configured to determine a first beam direction according to the M training signals
  • the transceiver 501 is configured to send a first random access message to the base station in a first beam direction, where the receiving unit is further configured to receive, in the first beam direction, a first random connection sent by the base station In response message.
  • processor 502 is specifically configured to:
  • processor 502 is specifically configured to:
  • processor 502 is specifically configured to:
  • the signal quality is determined according to any one of a received power, a signal to noise ratio, and a carrier to noise ratio of the training signal.
  • the transceiver 501 is configured to send an uplink data packet to the base station in the first beam direction, or receive a downlink data packet sent by the base station in the first beam direction. Text.
  • the transceiver 501 resends the first random access message if the first random access response message is not received within a preset time threshold.
  • the processor 502 reselects the base station access, where the F is greater than 1. Positive integer.
  • processor 502 is specifically configured to:
  • the frame number of the radio frame where the K training signals are located is after the frame number of the radio frame where the M training signals are located;
  • the transceiver 501 is configured to send a second random access message to the base station in the second beam direction; in the second beam direction. Receiving a second random access response message sent by the base station; or
  • the transceiver 501 is configured to send the second random connection in the second beam direction. And receiving a second random access response message sent by the base station in the second beam direction.
  • the embodiment of the present application provides a device for communication, where the device includes:
  • the transceiver 601 is configured to transmit M training signals in the N beam directions; the M and N are positive integers greater than 1, and M is greater than or equal to N; the first random access message sent by the receiving terminal;
  • the processor 602 is configured to determine a beam direction of the first random access message as a first beam direction of the terminal;
  • the transceiver 601 is configured to send a first random access response message to the terminal in the first beam direction.
  • the transceiver 601 is configured to: receive an uplink data packet sent by the terminal in the first beam direction; or send a downlink to the terminal in the first beam direction. Data message.
  • the beam direction of the first random access message is the same as the beam direction of the training sequence of the radio frame where the first random access message is located.
  • each of the M training signals includes a transmission frame number of the training signal, and a frame number of the initial transmission radio frame corresponding to the beam direction of the training signal and a continuous frame number of the corresponding beam direction of the training signal.
  • the transceiver 601 is further configured to receive a second random access message sent by the terminal;
  • the processor 602 is configured to determine a beam direction corresponding to the second random access message as a second beam direction of the terminal, and if it is determined that the second beam direction is different from the first beam direction, send and receive The machine 601 sends a second random access response message to the terminal in the second beam direction, and performs data transmission with the terminal in the second beam direction.
  • the transceiver can be a wired transceiver, a wireless transceiver, or a combination thereof.
  • the wired transceiver can be, for example, an Ethernet interface.
  • the Ethernet interface can be an optical interface, an electrical interface, or a combination thereof.
  • the wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof.
  • the processor may be a central processing unit (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of CPU and NP.
  • the processor may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (abbreviated as PLD), or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: generic array Logic, abbreviation: GAL) or any combination thereof.
  • the bus interface may also be included in FIG. 5 and FIG. 6.
  • the bus interface may include any number of interconnected buses and bridges, and specifically, various circuits of the memory represented by one or more processors and memories represented by the processor. Linked together.
  • the bus interface can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver provides means for communicating with various other devices on a transmission medium.
  • the processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.
  • the embodiment of the present application provides a computer program product, comprising computer readable instructions, when a computer reads and executes the computer readable instructions, such that the computer performs the method of any one of the above.
  • the embodiment of the present application provides a chip connected to a memory for reading and executing a software program stored in the memory to implement the methods in various possible designs in any of the above.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one flow of the flowchart or in more than two flows and/or block diagrams in one or more blocks.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one flow or more than two or more of the flow diagrams and/or one or more blocks of the block diagram.

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

Abstract

Procédé et un dispositif de communication. Le procédé comporte les étapes suivantes: un terminal reçoit M signaux d'apprentissage émis par une station de base dans N directions de faisceau, où M et N sont des entiers positifs supérieurs à 1, et M est supérieur ou égal à N; le terminal détermine une première direction de faisceau d'après les M signaux d'apprentissage; le terminal envoie un premier message d'accès aléatoire à la station de base dans la première direction de faisceau; et le terminal reçoit un premier message de réponse d'accès aléatoire émis par la station de base dans la première direction de faisceau.
PCT/CN2018/073486 2017-12-06 2018-01-19 La présente invention concerne un procédé et un dispositif de communication WO2019109484A1 (fr)

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CN105451255A (zh) * 2014-09-26 2016-03-30 中兴通讯股份有限公司 小区干扰管理策略的处理方法及装置
CN106982084A (zh) * 2016-01-19 2017-07-25 中兴通讯股份有限公司 一种混合波束训练方法、站点及终端
CN107360625A (zh) * 2016-05-09 2017-11-17 中兴通讯股份有限公司 一种传输数据的方法及装置

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EP2903176B1 (fr) * 2014-01-30 2020-03-11 Sony Corporation Procédé pour transmettre des données entre un équipement utilisateur et une station de base dans un réseau radio sans fil
CN107182120B (zh) * 2016-03-09 2019-09-17 电信科学技术研究院 一种随机接入的方法及装置
WO2017176022A1 (fr) * 2016-04-04 2017-10-12 Samsung Electronics Co., Ltd. Procédé et appareil des gestion de faisceau dans un système de formation de faisceau

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US20130165050A1 (en) * 2011-12-23 2013-06-27 Electronics And Telecommunications Research Institute Communication system for determining data transmitting scheme according to channel state
CN105451255A (zh) * 2014-09-26 2016-03-30 中兴通讯股份有限公司 小区干扰管理策略的处理方法及装置
CN106982084A (zh) * 2016-01-19 2017-07-25 中兴通讯股份有限公司 一种混合波束训练方法、站点及终端
CN107360625A (zh) * 2016-05-09 2017-11-17 中兴通讯股份有限公司 一种传输数据的方法及装置

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