WO2024021562A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2024021562A1
WO2024021562A1 PCT/CN2023/074993 CN2023074993W WO2024021562A1 WO 2024021562 A1 WO2024021562 A1 WO 2024021562A1 CN 2023074993 W CN2023074993 W CN 2023074993W WO 2024021562 A1 WO2024021562 A1 WO 2024021562A1
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WIPO (PCT)
Prior art keywords
superframe
frame
indication information
radio frame
information
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PCT/CN2023/074993
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English (en)
French (fr)
Inventor
陈岩
岳华伟
唐云帅
朱伟伟
柴方明
高林
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华为技术有限公司
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Publication of WO2024021562A1 publication Critical patent/WO2024021562A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and device.
  • the vehicle-mounted wireless short-range communication system includes a management (Grant, G) node and a terminal (Terminal, T) node.
  • the G node is the node that sends data scheduling information in the vehicle-mounted wireless short-range communication system
  • the T node is the vehicle-mounted wireless short-range communication system.
  • the short-range protocol in the vehicle-mounted wireless short-range communication system is called the GT protocol.
  • the GT protocol is similar to wireless fidelity (Wi-Fi) and supports working in unlicensed frequency bands.
  • the GT protocol introduces a discontinuous reception mode to ensure the coexistence of nodes in the GT protocol and nodes in the Wi-Fi protocol in the unlicensed frequency band.
  • the nodes in the GT protocol and the nodes in the Wi-Fi protocol preempt the air interface time. achieve coexistence.
  • the time when the G node seizes the air interface is random.
  • the superframe number indicated by the system message is only accumulated during the working time of seizing the air interface. Therefore, the T node cannot obtain the current superframe number and the G node 0 superframe only through the current superframe number.
  • Accurate relative time between numbers furthermore, after different T nodes access G node, since G node may not be working during the access time interval between T nodes, T nodes cannot only use the superframe number of their respective access times. Get accurate access time intervals. This problem is a major limitation for application scenarios such as smart speaker combinations.
  • Embodiments of the present application provide a communication method and device for realizing time synchronization between terminal nodes in a vehicle-mounted wireless short-distance communication system.
  • this application provides a communication method, which is applied to a vehicle-mounted wireless short-range communication system including a management node, including the following process: if it is in discontinuous reception mode, the management node determines the indication information; the management node sends the indication information , the indication information indicates the offset between the first wireless frame and the second wireless frame of the reference superframe, and the first wireless frame is related to the time when the indication information is sent.
  • the discontinuous reception mode refers to supporting the transmission of superframes with consecutive superframe numbers on discontinuous time resources.
  • the #N i.e., superframe No. N
  • the #N-1 superframe i.e., superframe No. N-1
  • Vehicle-mounted wireless short-range communication systems usually also include terminal nodes, and the management node can send instruction information to the terminal nodes.
  • the management node may send the indication information through broadcast, multicast, or unicast.
  • the management node can continuously send indication information during working hours. For example, the time when the management node seizes the transmission resources is the working time of the management node.
  • the management node After the management node recognizes that the terminal node is accessed, it sends indication information to the terminal node. After the terminal node is connected to the management node, the terminal node and the management node are in the same communication domain.
  • the reference superframe is superframe No. 0.
  • the management node can indicate the time difference between the first wireless frame and the second wireless frame by indicating the offset between the first wireless frame and the second wireless frame in the reference superframe, so the terminal node can sense The time offset between itself and the management node is used to achieve time synchronization between multiple terminal nodes using the management node as the benchmark.
  • the offset between the first radio frame and the second radio frame in the reference superframe is the number of radio frames between the first radio frame and the second radio frame in the reference superframe.
  • the preamble information and superframe are aligned with the wireless frame time granularity, so the offset or time difference can be indicated by the number of wireless frames between the first wireless frame and the second wireless frame, and the wireless When indicating the number of frames, the number of bits occupied by the indication information can be reduced and communication overhead can be reduced.
  • the management node when it sends the indication information, it may send preamble information to the terminal node, and the variable length part of the preamble information carries the indication information.
  • the length of the variable-length part is not fixed.
  • the variable-length part carries the indication information without additionally increasing the code rate of the preamble information. It can ensure the demodulation performance of the system, help ensure the stability of the communication system, and will not occupy additional space. Air interface resources can reduce communication overhead.
  • variable length part includes the management link system message Glink-SystemInfo-Message, and the Glink-SystemInfo-Message contains indication information.
  • time synchronization between terminal nodes can be achieved by carrying indication information through system messages transmitted in variable length parts.
  • the indication information specifically indicates the transmission of the first wireless frame of the variable length part (that is, the first wireless frame is the first wireless frame of the variable length part of the preamble information) and the number of superframe No. 0.
  • the management node when it sends the indication information, it may send preamble information to the terminal node, and the fixed length part of the preamble information carries the indication information.
  • the fixed-length part can be used to carry indication information to achieve time synchronization between terminal nodes.
  • the indication information specifically indicates the transmission of the first radio frame of the fixed length part (that is, the first radio frame is the first radio frame of the fixed length part of the preamble information) and the second radio frame of the No. 0 superframe.
  • the number of radio frames between two radio frames; or the indication information specifically indicates the first radio frame in the first superframe transmitted after the end of the fixed length part (that is, the first radio frame is after the end of the fixed length part of the preamble information)
  • the indication information when the management node sends the indication information, the indication information may be sent in the system message in the first superframe, which is the first superframe after the end of the preamble information.
  • the system messages transmitted in the superframe can carry indication information to achieve time synchronization between terminal nodes.
  • the indication information specifically indicates the first radio frame in the first superframe in which the system message is transmitted. (that is, the first radio frame is the first radio frame in the first superframe) and the number of radio frames between the second radio frame of superframe No. 0; or the indication information specifically indicates multiple radio frames for transmitting system messages.
  • the radio frame between the first radio frame in that is, the first radio frame is the first radio frame among multiple radio frames transmitting system messages in the first superframe
  • the indication information specifically indicates the last wireless frame among the multiple wireless frames transmitting the system message (that is, the first wireless frame is the last wireless frame among the multiple wireless frames transmitting the system message in the first superframe) and The number of radio frames between the second radio frame of superframe No. 0.
  • the management node when it sends the indication information, it may broadcast a timing management frame, the timing management frame is used for timing, and the timing management frame carries the indication information.
  • time management frames can be used to carry indication information to achieve time synchronization between terminal nodes.
  • the management node when it sends the indication information, it may send a link control layer data packet, and the header of the link control layer data packet carries the indication information.
  • time synchronization between terminal nodes can be achieved by carrying indication information in the link control layer header.
  • this application provides a communication method, which is applied to a vehicle-mounted wireless short-range communication system including a terminal node, including the following process: if it is in discontinuous reception mode, the terminal node receives indication information, and the indication information indicates the first The offset between the wireless frame and the second wireless frame in the reference superframe.
  • the first wireless frame is related to the time when the management node sends the indication information; the terminal node determines the distance between the first wireless frame and the second wireless frame based on the indication information. offset.
  • the offset between the first radio frame and the second radio frame in the reference superframe is the number of radio frames between the first radio frame and the second radio frame in the reference superframe.
  • the terminal node when the terminal node receives the indication information, it may receive preamble information, and the variable length part of the preamble information carries the indication information.
  • variable length part includes the management link system message Glink-SystemInfo-Message, and the Glink-SystemInfo-Message contains indication information.
  • the first wireless frame is: the first wireless frame of the variable length part of the preamble information; or the last wireless frame of the variable length part of the preamble information; or the variable length part of the preamble information
  • the terminal node when the terminal node receives the indication information, it may receive preamble information, and the fixed length part of the preamble information carries the indication information.
  • the first wireless frame is: the first wireless frame of the fixed-length part of the preamble information; or the last wireless frame of the fixed-length part of the preamble information; or transmitted after the fixed-length part of the preamble information ends.
  • the first radio frame in the first superframe is: the first wireless frame of the fixed-length part of the preamble information; or the last wireless frame of the fixed-length part of the preamble information; or transmitted after the fixed-length part of the preamble information ends.
  • the terminal node when it receives the indication information, it may receive the first superframe.
  • the system message in the first superframe carries the indication information.
  • the first superframe is the first superframe after the end of the preamble information. .
  • the first wireless frame is: the first wireless frame in the first superframe; or the first wireless frame among multiple wireless frames that transmit system messages in the first superframe; or the first wireless frame in the first superframe.
  • the terminal node when receiving the indication information, may receive a timing management frame, the timing management frame is used for timing, and the timing management frame carries the indication information.
  • the terminal node when receiving the indication information, may receive a link control layer data packet, and the header of the link control layer data packet carries the indication information.
  • a communication device in a third aspect, is provided.
  • the communication device may be a management node or a terminal node, or a setting device. Chip in the management node or end node.
  • the communication device can implement the method provided in any of the above aspects.
  • the communication device includes corresponding modules, units, or means (means) for implementing the above method.
  • the modules, units, or means can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • a communication device including a transceiver unit.
  • the communication device further includes a processing unit.
  • the communication device may implement any aspect or any one of the aspects implement the provided method.
  • a communication device including a processor.
  • the processor may be used to perform any of the above aspects or implement any of the methods provided in any of the aspects.
  • the device further includes a memory, the processor is coupled to the memory, and the memory is used to store computer programs or instructions.
  • the processor can execute the programs or instructions in the memory, so that the device can perform any of the above aspects or any of the above. Either of the aspects implements the provided method.
  • a sixth aspect provides a communication device, which includes an interface circuit and a logic circuit, and the logic circuit is coupled to the interface circuit.
  • the interface circuit may be a code/data read-write interface circuit, which is used to receive computer execution instructions (computer execution instructions are stored in the memory, may be read directly from the memory, or may pass through other devices) and transmitted to the logic circuit , so that the logic circuit runs the computer execution instructions to perform any of the above aspects or any of the aspects to implement the provided method.
  • the communication device may be a chip or a system on a chip.
  • a communication device including a processor, and the processor is coupled to a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute any one of the above aspects or any one of the aspects to implement the provided method.
  • processors there can be one or more processors, and there can also be one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be set in different On the chip, this application does not limit the type of memory and the arrangement of the memory and the processor.
  • ROM read-only memory
  • the communication device can be a chip, and the processor can be implemented by hardware or software.
  • the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor
  • the processor can be a general-purpose processor that is implemented by reading software code stored in a memory.
  • the memory can be integrated into the processor, or it can be located outside the processor and exist independently.
  • a processor including: an input circuit, an output circuit and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes any of the above aspects or any one of the aspects to implement the provided method.
  • the above-mentioned processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, the receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by the transmitter, and the input circuit and the output A circuit may be the same circuit that functions as an input circuit and an output circuit at different times.
  • This application does not limit the specific implementation methods of the processor and various circuits.
  • a ninth aspect provides a communication device, including: a logic circuit and an input-output interface, the input-output interface being used to communicate with a module outside the communication device; the logic circuit being used to run a computer program or instructions to execute any of the above Any method provided by the design.
  • the communication device may be a management node or a terminal node in any of the above aspects. point, or a device including the above-mentioned management node or terminal node, or a device included in the above-mentioned management node or terminal node, such as a chip.
  • the input/output interface may be a code/data read-write interface circuit, or a communication interface, which is used to receive computer programs or instructions (the computer programs or instructions are stored in the memory, may be read directly from the memory, or may be through other devices) and transmitted to the input and output interface, so that the input and output interface runs a computer program or instructions to perform any of the above methods.
  • the communication device may be a chip.
  • a computer program product includes: a computer program (which can also be called a code, or an instruction).
  • a computer program which can also be called a code, or an instruction.
  • the computer program When the computer program is run, it causes the computer to execute any of the above aspects or any of the aspects. Any of the methods provided.
  • a computer-readable medium stores a computer program (which can also be called a code, or an instruction), and when it is run on a computer, it causes the computer to execute any one of the above aspects or any one of the above. Either aspect implements the provided method.
  • a chip system in a twelfth aspect, includes a processor and an interface, and is used to support a communication device to implement any of the above aspects or any of the functions provided by any aspect.
  • the chip system further includes a memory for storing necessary information and data of the communication device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • a thirteenth aspect provides a chip device, which includes an input interface and/or an output interface.
  • the input interface can implement the receiving function provided by any of the above aspects or any one of the aspects
  • the output interface can implement the sending function provided by any of the above aspects or any of the aspects.
  • a fourteenth aspect provides a functional entity that is used to implement any of the above aspects or any of the methods provided in any of the aspects.
  • a fifteenth aspect provides a communication system, including a management node for performing the method in the first aspect and a terminal node for performing the method in the second aspect.
  • Figure 1 is a schematic diagram of the architecture of a vehicle-mounted wireless short-range communication system
  • Figure 2 is a schematic diagram of the architecture of a vehicle-mounted wireless short-range communication system
  • Figure 3 is a schematic diagram of a GT protocol working in the frequency band
  • FIG. 4 is a schematic diagram of a T node accessing a G node
  • Figure 5 is a schematic diagram of a communication process provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of the PDU format of transmission mode 1 provided by the embodiment of the present application.
  • FIG. 7 is a schematic diagram of the PDU format of transmission mode 1 provided by the embodiment of the present application.
  • FIG. 8 is a schematic diagram of the PDU format of transmission mode 2 provided by the embodiment of the present application.
  • FIG. 9 is a schematic diagram of the PDU format of transmission mode 2 provided by the embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Vehicle-mounted wireless short-range communication technology also called starlight technology
  • starlight technology has the advantages of ultra-low latency, ultra-high reliability, and precise synchronization, and is suitable for applications in smart cars, smart homes, smart terminals, and smart manufacturing.
  • applications in smart car scenarios include: immersive vehicle sound field & noise reduction, wireless interactive screen projection, and 360 panoramic surround view, etc., which can achieve an immersive interactive experience and improve vehicle safety.
  • the vehicle-mounted wireless short-range communication system can be used in combination with a mobile communication system, such as a mobile communication system including but not limited to a fourth generation (4th Generation, 4G) communication system (e.g., long term evolution, LTE) system), fifth-generation mobile communication (5th-generation, 5G) communication system (for example, new radio (NR) system), and future mobile communication systems such as 6G and other mobile communication systems.
  • 4G fourth generation
  • LTE long term evolution
  • 5th-generation, 5G for example, new radio (NR) system
  • future mobile communication systems such as 6G and other mobile communication systems.
  • the vehicle-mounted wireless short-range communication system includes G nodes and T nodes.
  • the G node is the node that sends data scheduling information in the vehicle-mounted wireless short-range communication system.
  • the T node is the node that receives data scheduling in the vehicle-mounted wireless short-range communication system. information, and nodes that send data based on data scheduling information.
  • an architecture of a vehicle-mounted wireless short-range communication system is shown in Figure 2.
  • the G node includes the car's domain controller (domain control unit, DCU), and the T node includes the car's screen and speakers.
  • the domain controller is the core of each functional domain of the car.
  • the functional domain can be divided into power domain (Power Train), chassis domain (Chassis), body domain (Body/Comfort), cockpit domain (Cockpit/Infotainment), and advanced driving assistance system. (advanced driving assistance system, ADAS), or the functional domain can be divided into vehicle domain controller (VDC), intelligent driving domain controller (ADAS ⁇ AD domain controller, ADC), intelligent cockpit domain controller (cockpit) domain controller, CDC).
  • the vehicle-mounted wireless short-range communication system is called the GT system
  • the short-range protocol in the vehicle-mounted wireless short-range communication system is called the GT protocol.
  • the GT protocol is similar to the Wi-Fi protocol and supports working in unlicensed frequency bands.
  • the GT protocol introduces a discontinuous reception mode, which supports the transmission of superframes with consecutive superframe numbers on discontinuous time resources to ensure the coexistence of nodes in the GT protocol and nodes in the Wi-Fi protocol in the unlicensed frequency band, as shown in the figure
  • the white part is the time occupied by the GT protocol for the transmission of data frames (referred to as GT data frames)
  • the black part is the time occupied by the Wi-Fi protocol for the transmission of data frames (referred to as Wi-Fi data frames).
  • the shaded part is the time occupied in the GT protocol discontinuous reception mode for transmitting preamble information.
  • the preamble information includes synchronization signal (synchronization, sync) 1, fixed length part, synchronization signal 2 and variable length part, where Wi- Fi nodes and GT nodes achieve coexistence by seizing air interface time.
  • the GT system Since in discontinuous reception mode, the GT system achieves coexistence with other systems such as Wi-Fi by preempting air interface time, the result is that different T nodes cannot obtain accurate access time intervals after successively accessing G nodes.
  • the T1 node accesses the G node at time t1
  • the T2 node accesses the G node at time t2.
  • the T1 node and the T2 node do not perceive the time of accessing the G node. If the T1 node and the T2 node need to be in the same The same frame of stereo sound from G node is played at all times. Since the access time interval between T nodes is difficult to determine, there may be an additional delay difference in the playback between T1 node and T2 node, destroying the stereo effect.
  • FIG. 5 is a schematic diagram of a communication process, including the following steps:
  • S502 The management node sends instruction information.
  • the terminal node receives the indication information.
  • the discontinuous reception mode refers to supporting the transmission of superframes with consecutive superframe numbers on discontinuous time resources. Therefore, if it is in the discontinuous reception mode, the management node can indicate the second radio frame of the first radio frame and the reference superframe through indication information. Offset between frames.
  • the first wireless frame is the wireless frame corresponding to the time when the indication information is sent, that is, the first wireless frame is related to the time when the indication information is sent, or in other words, the first wireless frame is related to the location (such as the wireless frame where the indication information is located) , for example, the first wireless frame and the wireless frame in which the indication information is located are the same wireless frame, or the first wireless frame and the wireless frame in which the indication information is located are not the same wireless frame but according to the preset rules, the wireless frame in which the indication information is located can be used.
  • the position of the first wireless frame is determined.
  • the value of the superframe number of the reference superframe is a non-negative integer.
  • the reference superframe is superframe No. 0, that is, the superframe with superframe number 0.
  • GT systems usually use 16 bits to indicate the superframe number. It can be understood that superframe No. 0 is only an example, and other superframe numbers (such as but not limited to superframe No. 1) that can achieve time synchronization between multiple terminal nodes are also applicable to the embodiment of the present application.
  • M is a positive integer less than or equal to 48.
  • m 1
  • the second radio frame is the first radio frame in the reference superframe.
  • the management node can continuously send indication information.
  • At least one terminal node is connected to the management node, and after the management node recognizes that at least one terminal node is connected, it sends indication information to at least one terminal node.
  • the terminal node's access to the management node may be that the terminal node joins the communication domain of the management node, that is, the terminal device and the management node to which it is connected are in the same communication domain.
  • the terminal node determines the offset between the first wireless frame and the second wireless frame according to the indication information.
  • the management node can indicate the time difference between the first radio frame and the second radio frame by indicating the offset between the first radio frame and the second radio frame of the reference superframe, so the terminal node can perceive itself Time offset between the management node and the management node, thereby achieving time synchronization between multiple terminal nodes using the management node as the benchmark.
  • the indication information may specifically indicate the number of radio frames between the first radio frame and the second radio frame in the reference superframe, that is, the number of radio frames between the first radio frame and the second radio frame in the reference superframe.
  • the offset between is the number of wireless frames between the first wireless frame and the second wireless frame in the reference superframe. That is to say, the number of wireless frames is used to represent the offset to realize the first wireless frame and the second wireless frame.
  • the indication of the time difference between frames and the indication of the number of wireless frames occupy fewer bits and require less communication overhead.
  • the indication information is the wireless frame number field.
  • the GT system supports the transmission of superframes with consecutive superframe numbers on discontinuous time resources.
  • the #N superframe that is, superframe number N, or superframe number N
  • #N-1 superframe that is, superframe number N-1, or superframe number is N
  • N-1 superframe number
  • the management node sends preamble information before the #N superframe time resource.
  • the starting time of the preamble information is aligned with the wireless frame time granularity, that is, the starting time of the preamble information There is an integer number of radio frames separated from the starting time of superframe No. 0.
  • the offset (or time difference) between the first wireless frame and the second wireless frame may be indicated by the number of wireless frames.
  • the number of bits occupied by this indication information is a positive integer.
  • Each superframe is 48 wireless frames, and 16 bits can represent 2 16 * 48 wireless frames. Therefore, 2 16 * 48 wireless frames can be represented by 22 (i.e. 16+6) bits, that is, the indication information can be represented by 22 bits. , repeated indications can be avoided when indicating the number of radio frames between the first radio frame and the second radio frame.
  • the indication information can occupy 28 bits. Since GT and Wi-Fi are time-division multiplexed in discontinuous reception mode, the time-division occupancy of GT superframes may be low in some scenarios (such as scenarios where superframes are discontinuous). This indication information is expressed in 28 bits (assuming that the wireless frame The number of bits is increased by 6 bits on the basis of 22 bits), which can support a scenario where the GT occupancy rate is about 1.6%.
  • the indication information can occupy 32 bits.
  • Implementation Mode 1 The indication information is carried in the preamble information, that is, in the above S502, the management node sends the preamble information, and accordingly, the terminal node receives the preamble information.
  • the preamble information in the GT system includes but is not limited to: the first set of synchronization sequence parts (sync1 in Figure 3), the fixed length part (hereinafter referred to as sig1), the second set of synchronization sequence parts (sync2 in Figure 3) and One or more of the variable length part (hereinafter referred to as sig2), etc.
  • the contents transmitted by the first group of synchronization sequence parts and the second group of synchronization sequence parts are synchronization sequences. No information bits are transmitted, and generally no new signaling fields are added. Therefore, the indication information can be carried in the fixed length part of the preamble information and/or can Variable length section.
  • variable length part (sig2) of the preamble information carries indication information.
  • the variable length part includes valid data symbols and padding parts.
  • the valid data symbols use extended cyclic prefix (cyclic prefix, CP)-orthogonal frequency division multiplexing (OFDM) symbols.
  • cyclic prefix cyclic prefix, CP
  • OFDM orthogonal frequency division multiplexing
  • the length of the padding part in the variable length part is the shortest length that aligns the starting moment of the superframe with the 640Ts time length granularity,
  • the padding length can be 0.
  • variable length part sends a management link system message
  • management link system message contains indication information
  • the management link system message is Glink-SystemInfo-Message.
  • Glink-SystemInfo-Message contains instruction information.
  • Glink is the communication link from the management node to the terminal node. This link can carry the data channel from the management node to the terminal node. , control channel, broadcast channel, synchronization signal, etc.
  • the management link system message is mainly used to carry the communication domain system message (DomainSysInfo).
  • the communication domain system message is generally sent by the management node in the communication domain to the terminal node of its communication domain in a broadcast manner.
  • the management link system message includes a communication domain system message, and the communication domain system message includes indication information.
  • Glink-SystemInfo-Message contains Glink-SystemInfo-Message-Information Element (IE), and Glink-SystemInfo-Message-IE contains DomainSysInfo:
  • IE Glink-SystemInfo-Message-Information Element
  • Glink-SystemInfo-Message-IE contains DomainSysInfo:
  • DomainSysInfo in the GT system is as follows, where DomainSysInfo contains communication domain system message information elements (DomainSysInfo-IEs):
  • DomainSysInfo-IEs can add new indication information.
  • the indication information is a wireless frame number field, and the field type is OPTIONAL.
  • DomainSysInfo-IEs is as follows, including the communication domain system message period (domainSysInfoPeriod) field, the communication domain system message duration (domainSysInfoOnDuration) field, the communication domain name (domainName) field, the communication domain identification (domainID) field, and multiple communication Domain synchronization information (multiDomainSyncInfo) field, carrier channel configuration (carrierChannelConf) field, non-contact resource (nonContentionAccessResource) field, nominal configuration (p0-NominalConfig) field, resource set configuration (ack-ResourceSetConf) field, superframe mode (sr -SuperFrameMode) field, domain coordination (domainCoordination) field, access control (accessControl) field, key negotiation (keyAlgNegotiation) field, test mode indication (testModeIndication) field, non-critical extension (nonC
  • the enumeration value (ENUMERATED) of domainSysInfoPeriod includes SF64, SF128, SF256, and SF512.
  • SF64 indicates that the starting number of the superframe in which DomainSysInfo is sent is a multiple of 64
  • SF128 indicates that the starting number of the superframe in which DomainSysInfo is sent is 128.
  • SF256 indicates that the starting number of the superframe in which DomainSysInfo is sent is a multiple of 256
  • SF512 indicates that the starting number of the superframe in which DomainSysInfo is sent is a multiple of 512.
  • the enumeration values of domainSysInfoOnDuration include SF64, SF128, SF256, and SF512.
  • the length of the multiDomainSyncInfo field is an interval from 1 to 25, or a fixed length of 8.
  • the length of the accessControl field is a fixed length of 4.
  • the length of the keyAlgNegotiation field is a fixed length of 32.
  • the enumeration values of the testModeIndication field are true (true) and false (false).
  • the wireless frame number field occupies 32 bits and the field type is OPTIONAL.
  • variable length part contains a new message
  • the new message contains indication information.
  • the new message is Sig2-extend-message.
  • This new message is in addition to the management link system message. For example, before the management link system message, the number of bits occupied by the new message is increased (such as adding 22bits or 28bits or 32bits), or before the management link system message. Then increase the number of bits occupied by the new message (such as adding 22bits or 28bits or 32bits), or if the new message can be defined according to the ASN.1 format, it can be expressed as follows:
  • this indication information includes but is not limited to one of the following:
  • the indication information specifically indicates the offset/number of radio frames between the n-th radio frame that transmits the variable-length part and the second radio frame (such as the m-th radio frame) of the reference superframe, that is, the first radio frame is the precursor.
  • the offset/number of radio frames, that is, the first radio frame is the first radio frame of the variable length part of the preamble information;
  • the indication information specifically indicates that the first radio frame (or other radio frames of the first superframe) in the second superframe (such as the first superframe or other superframe) transmitted after the end of the variable length part is different from the reference superframe.
  • the offset between the second radio frame of the frame/the number of radio frames, that is, the first radio frame is the second superframe transmitted after the variable length part of the preamble information ends (such as the first The first radio frame in a superframe);
  • the indication information specifically indicates the offset/number of radio frames between the first radio frame (or other radio frames) transmitting the preamble information and the second radio frame of the reference superframe, that is, the first radio frame is the first radio frame of the preamble information. wireless frames.
  • This implementation method 1.1 carries indication information in the variable length part, does not increase the code rate of other parts (the first group of synchronization sequences, the second group of synchronization sequences, the fixed length part), and does not affect the demodulation performance of other parts. It is beneficial to ensure the stability of the communication system, and will not occupy additional air interface resources or occupy excessive overhead.
  • the fixed-length part contains 14 CP-OFDM symbols, transmitting a total of 131 information bits, which is equivalent to the length of 2 wireless frames.
  • new indication information can be added to the fixed length part, such as increasing the number of bits occupied by the indication information in the fixed length part (such as adding 22bits or 28bits or 32bits, that is, increasing the length of the fixed length part from 131bits to 153bits or to 159bits or increased to 163bits).
  • the fixed-length part may be added after 131 bits of the fixed-length part, or may be added before 131 bits of the fixed-length part.
  • this indication information includes but is not limited to one of the following:
  • the indication information specifically indicates the offset/number of wireless frames between the n-th wireless frame that transmits the fixed-length part and the second wireless frame of the reference superframe (such as the m-th wireless frame), that is, the first wireless frame is the preamble information.
  • the offset/number of radio frames, that is, the first radio frame is the first radio frame of the fixed-length part of the preamble information;
  • the indication information specifically indicates the difference between the first radio frame (or other radio frames of the first superframe) and the reference superframe in the third superframe (such as the first superframe or other superframes) transmitted after the end of the fixed length part.
  • the offset between the second radio frames/the number of radio frames, that is, the first radio frame is the first radio frame in the third superframe (such as the first superframe) transmitted after the fixed length part of the preamble information ends ;
  • the indication information specifically indicates the offset/number of radio frames between the first radio frame (or other radio frames) transmitting the preamble information and the second radio frame of the reference superframe, that is, the first radio frame is the first radio frame of the preamble information. wireless frames.
  • Implementation Mode 2 The indication information is carried in the system message transmitted in the superframe, that is, in the above S502, the management node sends the indication information in the system message in the first superframe, and accordingly, the terminal node receives the first superframe. .
  • the first superframe is the superframe after the end of the preamble information, that is, the superframe used to transmit data frames.
  • the first superframe is the first superframe after the end of the preamble information (or it can be other superframes).
  • the earlier the indication information is indicated that is, the earlier the terminal node receives the indication information, the faster it can be Realize time synchronization between terminal nodes.
  • System messages are also sent in superframes in discontinuous reception mode. Therefore, in this implementation, indication information can be carried in the system messages transmitted in superframes.
  • the above implementation method 1.1 can also carry indication information in the system message of the variable length part of the preamble information, in the discontinuous reception mode, if the indication information is configured in the system message of the variable length part, To send, the system message in the first superframe can be configured not to send. On the contrary, if the indication information is configured not to send in the system message of the variable length part, then in the system message in the first superframe It can be configured to send, that is, in the discontinuous reception mode, at least one of the system message of the variable length part and the system message in the first superframe is configured to send the indication information.
  • this indication information includes but is not limited to one of the following:
  • the indication information specifically indicates the offset/number of radio frames between the n-th radio frame of the first superframe of the transmission system and the second radio frame (such as the m-th radio frame) of the reference superframe, that is, the first radio frame is the first wireless frame in the first superframe;
  • the indication information specifically indicates the offset/number of radio frames between the first radio frame (or other radio frames) of the multiple radio frames that transmit the system message and the second radio frame of the reference superframe, that is, the first radio frame is The first radio frame among multiple radio frames that transmit system messages in the first superframe, such as the first radio frame being the first radio frame in the current superframe (e.g., the first superframe);
  • the indication information specifically indicates the offset/number of radio frames between the last radio frame of multiple radio frames of the transmission system and the second radio frame of the reference superframe, that is, the first radio frame is the transmission system message in the first superframe.
  • the last radio frame among multiple radio frames for example, the first radio frame is the last radio frame in the current superframe (for example, the first superframe).
  • the indication information is carried in the timing management frame, that is, in the above S502, the management node broadcasts the timing management frame, and the timing management frame carries the indication information.
  • the terminal node receives the timing management frame.
  • Timing management frames are used for timing.
  • the timing management frame can be a system message, which is periodically scheduled using a scheduling method similar to the system message, so that the terminal node can determine the time.
  • the timing management frame is a new system message in the GT system, such as the management link timing message Glink-TimeInfo-Message.
  • the timing management frame can be as follows, where Glink-TimeInfo-Message contains Glink-TimeInfo-Message-IE, and Glink-TimeInfo-Message-IE contains frameCntInfo:
  • frameCntInfo can carry indication information.
  • Implementation Mode 4 The indication information is carried in the link control layer packet header for indication, that is, in the above S502, the management node sends the link control layer data packet, and the link control layer data packet header carries the indication information.
  • the terminal The node receives link control layer packets.
  • the data transmitted by the physical layer will be packaged through the link control (LC) layer.
  • the LC layer can contain one or more link control entities, one of which corresponds to a logical channel.
  • the LC layer provides data transmission services for the upper layer and supports many different types of transmission modes. Some of the supported transmission modes are shown in Table 1:
  • Implementation method 4.1 When transmitting data using transmission mode 1, the indication information is carried in the header of the link control layer data packet.
  • a protocol data unit (PDU) format of transmission mode 1 is shown in Figure 6.
  • This PDU format does not carry segmentation offset values.
  • the PDU format includes L bytes. Different values of byte 1 represent different meanings. For example, if byte 1 is 0, it means data/control, if byte 1 is 1, it means query, and if byte 1 is 2 or 3, it means segmentation indication. , byte 1 is 4 or 5 is reserved, byte 1 is 6 or 7 indicates the sequence number.
  • Bytes 2 and 3 represent the sequence number
  • bytes 4 and 5 represent the upper layer protocol indication
  • byte 6 represents data
  • byte L-3 represents the first byte of integrity protection (optional)
  • byte L -2 represents the second byte of integrity protection (optional)
  • byte L-1 represents the third byte of integrity protection (optional)
  • byte L represents the fourth byte of integrity protection (optional).
  • additional indication information (such as adding a wireless frame number) can be added between byte 5 and byte 6 of the PDU format. If the indication information occupies 32 bits, add 4 bytes between byte 5 and byte 6 of the PDU format to represent the indication information, such as the new byte 5.1 to the new byte 5.4 in Figure 6.
  • a PDU format of transmission mode 1 is shown in Figure 7.
  • This PDU format carries segment offset values.
  • the PDU format includes L bytes. Different values of byte 1 represent different meanings. For example, if byte 1 is 0, it means data/control, if byte 1 is 1, it means query, and if byte 1 is 2 or 3, it means segmentation indication. , byte 1 is 4 or 5 is reserved, byte 1 is 6 or 7 indicates the sequence number.
  • Bytes 2 and 3 represent the sequence number
  • bytes 4 and 5 represent the segment offset value
  • bytes 6 and 7 represent the upper layer protocol indication
  • byte 8 represents the data
  • byte L-3 represents the integrity protection
  • byte L-2 represents the second byte of integrity protection (optional)
  • byte L-1 represents the third byte of integrity protection (optional)
  • byte L represents completeness
  • the fourth byte of sexual protection (optional).
  • additional indication information (such as adding a wireless frame number) can be added between byte 7 and byte 8 of the PDU format. If the indication information occupies 32 bits, add 4 bytes between byte 7 and byte 8 of the PDU format to represent the indication information, such as the new byte 7.1 to the new byte 7.4 in Figure 7.
  • Implementation method 4.2 When transmitting data in transmission mode 2, the indication information is carried in the header of the link control layer data packet.
  • a PDU format of transmission mode 2 is shown in Figure 8. This PDU format does not carry segment offset values.
  • the PDU format includes L bytes. Different values of byte 1 represent different meanings. For example, if byte 1 is 0 or 1, it indicates segmentation indication. If byte 1 is 2 or 3 or 4 or 5, it is reserved. 1 for 6 or 7 represents the sequence number. Bytes 2 and 3 represent the sequence number, bytes 4 and 5 represent the upper layer protocol indication, byte 6 represents data,..., byte L-3 represents the first byte of integrity protection (optional), byte L -2 represents the second byte of integrity protection (optional), byte L-1 represents the third byte of integrity protection (optional), and byte L represents the fourth byte of integrity protection (optional).
  • additional indication information can be added between byte 5 and byte 6 of the PDU format. If the indication information occupies 32 bits, add 4 bytes between byte 5 and byte 6 of the PDU format to represent the indication information, such as the new byte 5.1 to the new byte 5.4 in Figure 8.
  • a PDU format of transmission mode 2 is shown in Figure 9.
  • This PDU format carries segment offset values.
  • the PDU format includes L bytes. Different values of byte 1 indicate different meanings. For example, if byte 1 is 0 or 1, it indicates segmentation indication. If byte 1 is 2 or 3 or 4 or 5, it is reserved. 1 for 6 or 7 represents the sequence number.
  • Bytes 2 and 3 represent the sequence number
  • bytes 4 and 5 represent the upper layer protocol indication
  • bytes 6 and 7 represent the segment offset value
  • byte 8 represents the data
  • byte L-3 represents the integrity protection
  • byte L-2 indicates integrity protection
  • byte L-1 represents the third byte of integrity protection (optional)
  • byte L represents the fourth byte of integrity protection (optional).
  • additional indication information (such as adding a wireless frame number) can be added between byte 7 and byte 8 of the PDU format. If the indication information occupies 32 bits, add 4 bytes between byte 7 and byte 8 of the PDU format to represent the indication information, such as the new byte 7.1 to the new byte 7.4 in Figure 9.
  • the terminal node can sense the time offset/time difference between itself and the management node, thereby achieving time synchronization between the terminal nodes using the management node as a benchmark.
  • the management node can send the data frame to the second terminal node at the first time point. After the first time point ( ⁇ t2- ⁇ t1) At a time point, the data frame is sent to the first terminal node. The first terminal node and the second terminal node play the data frame after receiving it at the same time point, thereby realizing simultaneous playback of the data frame between the first terminal node and the second terminal node.
  • the management node can send the data frame to the first terminal node and the second terminal node at the same time.
  • the first terminal node plays the data frame at a time point ( ⁇ t2- ⁇ t1) after receiving the data frame, and the second terminal node receives the data frame. After playing, the data frame can be played simultaneously between the first terminal node and the second terminal node.
  • first superframe first wireless frame
  • last wireless frame etc. involved in the embodiments of this application are only examples and do not constitute limitations.
  • the superframe number and wireless frame number are also applicable to the embodiments of this application.
  • the plurality mentioned in this application refers to two or more than two.
  • the communication device 1000 includes a processing unit 1001 and a transceiver unit 1002.
  • the communication device 1000 can be used to implement the method described in the above method embodiment.
  • the device 1000 is applied to a management node or a terminal node, may be a chip used in a management node or a terminal node, or may be applied to a device including a management node or a terminal node.
  • the apparatus 1000 is applied to a management node.
  • the processing unit 1001 is configured to determine the indication information by the management node if it is in discontinuous reception mode;
  • the transceiver unit 1002 is configured for the management node to send indication information.
  • the indication information indicates an offset between the first wireless frame and the second wireless frame in the reference superframe.
  • the first wireless frame is related to the time at which the indication information is sent.
  • the offset between the first radio frame and the second radio frame in the reference superframe is the number of radio frames between the first radio frame and the second radio frame in the reference superframe.
  • the transceiver unit 1002 is specifically configured to send preamble information, and the variable length part of the preamble information carries indication information.
  • variable-length part includes a management link system message Glink-SystemInfo-Message
  • Glink-SystemInfo-Message includes indication information
  • the first radio frame is: the first radio frame of the variable length part of the preamble information; or the last radio frame of the variable length part of the preamble information; or after the end of the variable length part of the preamble information.
  • Transmission The first radio frame in the first superframe; or the first radio frame of the preamble information.
  • the transceiver unit 1002 is specifically configured to send preamble information, and the fixed length part of the preamble information carries indication information.
  • the first wireless frame is: the first wireless frame of the fixed-length part of the preamble information; or the last wireless frame of the fixed-length part of the preamble information; or the third wireless frame transmitted after the fixed-length part of the preamble information ends.
  • the first radio frame in a superframe.
  • the transceiver unit 1002 is specifically configured to send indication information in the system message in the first superframe, and the third superframe is the first superframe after the end of the preamble information.
  • the first wireless frame is: the first wireless frame in the first superframe; or the first wireless frame among multiple wireless frames transmitting system messages in the first superframe; or the first superframe.
  • the last radio frame among multiple radio frames that transmit system messages in the frame.
  • the transceiver unit 1002 is specifically configured to broadcast a timing management frame, the timing management frame is used for timing, and the timing management frame carries indication information.
  • the transceiver unit 1002 is specifically configured to send a link control layer data packet, and the header of the link control layer data packet carries indication information.
  • the apparatus 1000 is applied to a terminal node.
  • the transceiver unit 1002 is configured to, if the terminal node is in the discontinuous reception mode, receive indication information, the indication information indicates the offset between the first wireless frame and the second wireless frame in the reference superframe, and the first wireless frame and the second wireless frame in the reference superframe. It is related to the time when the management node sends the instruction information;
  • the processing unit 1001 is configured to determine the offset between the first wireless frame and the second wireless frame according to the indication information.
  • the offset between the first radio frame and the second radio frame in the reference superframe is the number of radio frames between the first radio frame and the second radio frame in the reference superframe.
  • the transceiver unit 1002 is specifically configured to receive preamble information, and the variable length part of the preamble information carries indication information.
  • variable-length part includes a management link system message Glink-SystemInfo-Message
  • Glink-SystemInfo-Message includes indication information
  • the first radio frame is: the first radio frame of the variable length part of the preamble information; or the last radio frame of the variable length part of the preamble information; or after the end of the variable length part of the preamble information.
  • the first radio frame in the first superframe transmitted; or the first radio frame of the preamble information.
  • the transceiver unit 1002 is specifically configured to receive preamble information, and the fixed length part of the preamble information carries indication information.
  • the first wireless frame is: the first wireless frame of the fixed-length part of the preamble information; or the last wireless frame of the fixed-length part of the preamble information; or the third wireless frame transmitted after the fixed-length part of the preamble information ends.
  • the first radio frame in a superframe.
  • the transceiver unit 1002 is specifically configured to receive a first superframe.
  • the system message in the first superframe carries indication information.
  • the first superframe is the first superframe after the end of the preamble information.
  • the first wireless frame is: the first wireless frame in the first superframe; or the first wireless frame among multiple wireless frames transmitting system messages in the first superframe; or the first superframe.
  • the last radio frame among multiple radio frames that transmit system messages in the frame.
  • the transceiver unit 1002 is specifically configured to receive timing management frames, and the timing management frames are used for timing,
  • the timing management frame carries indication information.
  • the transceiver unit 1002 is specifically configured to receive a link control layer data packet, and the header of the link control layer data packet carries indication information.
  • each functional unit in each embodiment of the present application It can be integrated in a processing unit, or it can exist physically alone, or two or more units can be integrated in one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • Integrated units may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the integrated unit can be stored in a storage medium as a computer software product, including a number of instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) Execute all or part of the steps of the methods of each embodiment of the application.
  • a computer device which can be a personal computer, a server, or a network device, etc.
  • processor processor
  • this embodiment of the present application also provides a schematic structural diagram of a communication device 1100.
  • the communication device 1100 may be used to implement the method described in the above method embodiment. Please refer to the description in the above method embodiment.
  • the communication device 1100 can perform each step performed by the management node or the terminal node in the method of FIG. 5 .
  • the Communication device 1100 includes one or more processors 1101.
  • the processor 1101 may be a general-purpose processor or a special-purpose processor, or the like.
  • it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process data of software programs.
  • the communication device may include a transceiver unit to implement input (reception) and output (transmission) of signals.
  • the transceiver unit can be a transceiver, a radio frequency chip, etc.
  • the communication device 1100 includes one or more processors 1101, and the one or more processors 1101 can implement the methods in the embodiments shown above.
  • the processor 1101 can also implement other functions.
  • the processor 1101 can execute instructions to cause the device 1100 to perform the method described in the above method embodiment.
  • the instructions may be stored in whole or in part within processor 1101, such as instructions 1103 may be stored in whole or in part in processor 1101, or instructions 1103 may be stored in processor 1101, and instructions 1104 may be stored in memory 1102 coupled to the processor,
  • the processor 1101 can synchronously execute instructions 1103 and 1104 to cause the communication device 1100 to perform the method described in the above method embodiment. Instructions 1103 and 1104 are also referred to as computer programs.
  • the communication device 1100 may also include a circuit, and the circuit may implement the functions in the foregoing method embodiments.
  • the communication device 1100 may include one or more memories 1102 on which instructions 1104 are stored.
  • the instructions may be executed on the processor 1101 so that the device 1100 executes the method described in the above method embodiment.
  • the memory 1102 may also store data.
  • Optional processor 1101 may also store instructions and/or data.
  • one or more memories 1102 may store the corresponding relationships described in the above embodiments, or related parameters or tables involved in the above embodiments.
  • the processor and memory can be set up separately or integrated together.
  • the device 1100 may also include a transceiver 1105 and an antenna 1106.
  • the processor 1101 may be called a processing unit and controls a device (terminal or base station).
  • the transceiver 1105 may be called a transceiver, a transceiver circuit, a transceiver unit, etc., and is used to implement the transceiver function of the device through the antenna 1106.
  • the processor can be a general-purpose central processing unit (CPU), a microprocessor, a specific Application-specific integrated circuit (ASIC), one or more integrated circuits used to control program execution of the solution of this application, general-purpose processor, digital signal processor (DSP), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • CPU central processing unit
  • ASIC Application-specific integrated circuit
  • DSP digital signal processor
  • FPGA off-the-shelf programmable gate array
  • FPGA field programmable gate array
  • Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory.
  • Erase programmable read-only memory Electrically EPROM, EEPROM
  • Volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • synchronous link dynamic random access memory synchronous link DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the embodiment of the present application also provides a communication system, including a management node and a terminal node.
  • the management node and the terminal node can implement the communication method of the above method embodiment.
  • Embodiments of the present application also provide a computer-readable medium on which a computer program is stored.
  • the computer program is executed by a computer, the communication method of the above method embodiment is implemented.
  • An embodiment of the present application also provides a computer program product, including a computer program, which implements the communication method of the above method embodiment when executed by a computer.
  • a computer program product includes one or more computer instructions.
  • Computer instructions When computer instructions are loaded and executed on a computer, processes or functions according to embodiments of the present application are generated in whole or in part.
  • the computer may be the communication device described above.
  • Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer-readable storage medium may be the above-mentioned storage medium or the above-mentioned memory.
  • the processor 1101 may be one or more logic circuits, a sending unit or a receiving unit.
  • the transceiver 1105 may be an input-output interface, also called a communication interface, or an interface circuit, or an interface, etc.
  • the transceiver 1105 can also be a sending unit and a receiving unit.
  • the sending unit can be an output interface
  • the receiving unit can be an input interface.
  • the sending unit and the receiving unit are integrated into one unit, such as an input-output interface.
  • the communication device 1200 shown in FIG. 12 includes a logic circuit 1201 and an interface circuit 1202 .
  • the above-mentioned processing unit or processor 1101 can be implemented by the logic circuit 1201, and the transceiver unit or transceiver 1105 can be implemented by the interface circuit 1202.
  • the logic circuit 1201 may be a chip, a processing circuit, an integrated circuit or a system on chip (SoC) chip, etc.
  • the interface circuit 1202 may be a communication interface, an input/output interface, etc.
  • the logic circuit and the interface circuit may also be coupled to each other. The embodiments of this application do not limit the specific connection methods of the logic circuit and the interface circuit.
  • the logic circuit 1201 and the interface circuit 1202 may be used to perform functions or operations performed by the above-mentioned management node or terminal node, etc.
  • the interface circuit 1202 may be used to receive signals from other communication devices other than the communication device 1200 and transmit them to the logic circuit 1201 or to send signals from the logic circuit 1201 to other communication devices other than the communication device 1200 .
  • the logic circuit 1201 may be used to implement the above method embodiments by executing code instructions.
  • the interface circuit 1202 if it is in the discontinuous reception mode, it sends indication information.
  • the indication information indicates the offset between the first wireless frame and the second wireless frame of the reference superframe, and the time between the first wireless frame and the sending indication information. related.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units, or may be electrical, mechanical or other forms of connection.
  • a unit described as a separate component may or may not be physically separate.
  • a component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.
  • each functional unit in various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • Computer-readable media includes computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • Storage media can be any available media that can be accessed by the computer.

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Abstract

本申请提供一种通信方法及装置,该方法包括:若处于非连续接收模式,管理节点确定指示信息,管理节点发送指示信息,指示信息用于指示第一无线帧与参考超帧中的第二无线帧之间的偏移,第一无线帧与发送指示信息的时刻有关。在该方法中管理节点通过指示第一无线帧与参考超帧中的第二无线帧之间的偏移,可以指示第一无线帧与第二无线帧之间的时间差,因此终端节点可以感知自身与管理节点之间的时间偏移,从而以管理节点作为基准实现多个终端节点之间的时间同步。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2022年07月28日提交中国国家知识产权局、申请号为202210898037.5、申请名称为“一种通信方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种通信方法及装置。
背景技术
车载无线短距通信系统中包括管理(Grant,G)节点和终端(Terminal,T)节点,G节点为车载无线短距通信系统中发送数据调度信息的节点,T节点为车载无线短距通信系统中接收数据调度信息,根据数据调度信息发送数据的节点。为了便于描述,将车载无线短距通信系统中的短距协议称为GT协议。
GT协议与无线保真(wireless fidelity,Wi-Fi)相似,支持在非授权(unlicense)频段工作。GT协议引入了非连续接收模式,以保证GT协议中的节点和Wi-Fi协议中的节点在unlicense频段的共存,其中GT协议中的节点与Wi-Fi协议中的节点通过抢占空口时间的方式实现共存。
G节点抢占空口的时间是随机的,系统消息指示的超帧号仅在抢到空口的工作时间内累积,所以T节点仅通过当前超帧号不能获得当前超帧号和G节点0号超帧号之间的准确相对时间;进而不同T节点接入G节点后,由于T节点间接入时间间隔内G节点可能有未工作时间,T节点之间也不能仅通过各自接入时刻的超帧号获得准确的接入时间间隔。这一问题对于智能音箱组合等应用场景是一个较大的限制。
发明内容
本申请实施例提供一种通信方法及装置,用于实现车载无线短距通信系统中终端节点之间的时间同步。
第一方面,本申请提供一种通信方法,该方法应用于包括有管理节点的车载无线短距通信系统,包括如下过程:若处于非连续接收模式,管理节点确定指示信息;管理节点发送指示信息,指示信息指示第一无线帧与参考超帧的第二无线帧之间的偏移,第一无线帧与发送指示信息的时刻有关。
非连续接收模式指支持超帧号连续的超帧在不连续的时间资源上传输。例如管理节点传输数据使用的#N(即N号超帧)超帧在时间上与#N-1超帧(即N-1号超帧)不连续。
车载无线短距通信系统中通常还包括终端节点,管理节点可以向终端节点发送指示信息。例如,管理节点可以通过广播、或组播、或单播的方式发送指示信息。
一个可能的实现中,管理节点可以在工作时间内持续发送指示信息。示例的,管理节点抢占到传输资源的时间为管理节点的工作时间。
一个可能的实现中,管理节点识别到终端节点接入后,向该终端节点发送指示信息。其中终端节点接入管理节点后,终端节点和管理节点在同一通信域内。
示例的,参考超帧为0号超帧。
在该方法中,管理节点通过指示第一无线帧与参考超帧中的第二无线帧之间的偏移,可以指示第一无线帧与第二无线帧之间的时间差,因此终端节点可以感知自身与管理节点之间的时间偏移,从而以管理节点作为基准实现多个终端节点之间的时间同步。
在一种可能的实现中,第一无线帧与参考超帧中的第二无线帧之间的偏移,为第一无线帧与参考超帧中的第二无线帧之间的无线帧个数。在车载无线短距通信系统中,前导信息以及超帧与无线帧时间粒度对齐,因此可以通过第一无线帧与第二无线帧之间的无线帧个数来指示偏移或时间差,并且通过无线帧个数指示时,可以降低指示信息占用的比特数,以及减少通信开销。
在一种可能的实现中,管理节点发送指示信息时,可以向终端节点发送前导信息,前导信息的可变长度部分中携带指示信息。可变长度部分的长度不固定,通过可变长度部分携带指示信息,不会额外增加前导信息的码率,可以保证系统的解调性能,有利于保证通信系统的稳定性,并且不会额外占用空口资源,可以减少通信开销。
在一种可能的实现中,可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,Glink-SystemInfo-Message中包含指示信息。在该实现中可以通过可变长度部分传输的系统消息携带指示信息,实现终端节点之间的时间同步。
在一种可能的实现中,指示信息具体指示传输可变长度部分的第一个无线帧(即第一无线帧为前导信息的可变长度部分的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示传输可变长度部分的最后一个无线帧(即第一无线帧为前导信息的可变长度部分的最后一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示可变长度部分结束后传输的第一个超帧中的第一个无线帧(即第一无线帧为前导信息的可变长度部分结束后传输的第一个超帧的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示传输前导信息的第一个无线帧(即第一无线帧为前导信息的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数。
在一种可能的实现中,管理节点发送指示信息时,可以向终端节点发送前导信息,前导信息的固定长度部分中携带指示信息。在该实现中可以通过固定长度部分携带指示信息,实现终端节点之间的时间同步。
在一种可能的实现中,指示信息具体指示传输固定长度部分的第一个无线帧(即第一无线帧为前导信息的固定长度部分的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示传输固定长度部分的最后一个无线帧(即第一无线帧为前导信息的固定长度部分的最后一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示固定长度部分结束后传输的第一个超帧中的第一个无线帧(即第一无线帧为前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数。
在一种可能的实现中,管理节点发送指示信息时,可以在第一超帧中的系统消息中,发送指示信息,第一超帧为前导信息结束后的第一个超帧。在该实现中可以通过超帧中传输的系统消息携带指示信息,实现终端节点之间的时间同步。
在一种可能的实现中,指示信息具体指示传输系统消息的第一超帧中的第一无线帧 (即第一无线帧为第一超帧中的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示传输系统消息的多个无线帧中的第一个无线帧(即第一无线帧为第一超帧中传输系统消息的多个无线帧中的第一个无线帧)与0号超帧的第二无线帧之间的无线帧个数;或者指示信息具体指示传输系统消息的多个无线帧中的最后一个无线帧(即第一无线帧为第一超帧中传输系统消息的多个无线帧中的最后一个无线帧)与0号超帧的第二无线帧之间的无线帧个数。
在一种可能的实现中,管理节点发送指示信息时,可以广播授时管理帧,授时管理帧用于授时,授时管理帧携带指示信息。在该实现中,可以通过授时管理帧携带指示信息,实现终端节点之间的时间同步。
在一种可能的实现中,管理节点发送指示信息时,可以发送链路控制层数据包,链路控制层数据包的包头中携带指示信息。在该实现中,可以通过链路控制层包头携带指示信息,实现终端节点之间的时间同步。
第二方面,本申请提供一种通信方法,该方法应用于包括有终端节点的车载无线短距通信系统,包括如下过程:若处于非连续接收模式,终端节点接收指示信息,指示信息指示第一无线帧与参考超帧中的第二无线帧之间的偏移,第一无线帧与管理节点发送指示信息的时刻有关;终端节点根据指示信息,确定第一无线帧与第二无线帧之间的偏移。
在一种可能的实现中,第一无线帧与参考超帧中的第二无线帧之间的偏移,为第一无线帧与参考超帧中的第二无线帧之间的无线帧个数。
在一种可能的实现中,终端节点接收指示信息时,可以接收前导信息,前导信息的可变长度部分中携带指示信息。
在一种可能的实现中,可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,Glink-SystemInfo-Message中包含指示信息。
在一种可能的实现中,第一无线帧为:前导信息的可变长度部分的第一个无线帧;或者前导信息的可变长度部分的最后一个无线帧;或者前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者前导信息的第一个无线帧。
在一种可能的实现中,终端节点接收指示信息时,可以接收前导信息,前导信息的固定长度部分中携带指示信息。
在一种可能的实现中,第一无线帧为:前导信息的固定长度部分的第一个无线帧;或者前导信息的固定长度部分的最后一个无线帧;或者前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
在一种可能的实现中,终端节点接收指示信息时,可以接收第一超帧,第一超帧中的系统消息中携带指示信息,第一超帧为前导信息结束后的第一个超帧。
在一种可能的实现中,第一无线帧为:第一超帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的最后一个无线帧。
在一种可能的实现中,终端节点接收指示信息时,可以接收授时管理帧,授时管理帧用于授时,授时管理帧携带指示信息。
在一种可能的实现中,终端节点接收指示信息时,可以接收链路控制层数据包,链路控制层数据包的包头中携带指示信息。
第三方面,提供一种通信装置,该通信装置可以为管理节点或终端节点,或者为设置 在管理节点或终端节点中的芯片。该通信装置可以实现上述任一方面所提供的方法。
通信装置包括实现上述方法相应的模块、单元、或手段(means),该模块、单元、或means可以通过硬件实现,软件实现,或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
第四方面,提供一种通信装置,包括收发单元。可选地,该通信装置还包括处理单元。该通信装置可以实现任一方面或任一方面中的任一项实现所提供的方法。
第五方面,提供一种通信装置,包括处理器。该处理器可用于执行上述任一方面或任一方面中的任一项实现所提供的方法。可选地,该装置还包括存储器,该处理器与存储器耦合,存储器中用于存储计算机程序或指令,处理器可以执行存储器中的程序或指令,以使得该装置可以执行上述任一方面或任一方面中的任一项实现所提供的方法。
第六方面,提供一种通信装置,该装置包括接口电路和逻辑电路,逻辑电路与接口电路耦合。该接口电路可以为代码/数据读写接口电路,该接口电路用于接收计算机执行指令(计算机执行指令存储在存储器中,可能直接从存储器读取,或可能经过其他器件)并传输至该逻辑电路,以使该逻辑电路运行计算机执行指令以执行上述任一方面或任一方面中的任一项实现所提供的方法。
在一些可能的设计中,该通信装置可以为芯片或芯片系统。
第七方面,提供一种通信装置,包括处理器,处理器和存储器耦合。该处理器用于读取存储器中存储的指令,并可通过接收器接收信号,通过发射器发射信号,以执行上述任一方面或任一方面中的任一项实现所提供的方法。
可选地,该处理器可以为一个或多个,该存储器也可以为一个或多个。可选地,该存储器可以与该处理器集成在一起,或者该存储器与处理器分离设置。
在具体实现过程中,存储器可以为非瞬时性(non-transitory)存储器,例如只读存储器(read only memory,ROM),其可以与处理器集成在同一块芯片上,也可以分别设置在不同的芯片上,本申请对存储器的类型以及存储器与处理器的设置方式不做限定。
该通信装置可以是一个芯片,该处理器可以通过硬件来实现也可以通过软件来实现,当通过硬件实现时,该处理器可以是逻辑电路、集成电路等;当通过软件来实现时,该处理器可以是一个通用处理器,通过读取存储器中存储的软件代码来实现,该存储器可以集成在处理器中,可以位于该处理器之外,独立存在。
第八方面,提供一种处理器,包括:输入电路、输出电路和处理电路。该处理电路用于通过该输入电路接收信号,并通过该输出电路发射信号,使得该处理器执行上述任一方面或任一方面中的任一项实现所提供的方法。
在具体实现过程中,上述处理器可以为芯片,输入电路可以为输入管脚,输出电路可以为输出管脚,处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的,输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的,且输入电路和输出电路可以是同一电路,该电路在不同的时刻分别用作输入电路和输出电路。本申请对处理器及各种电路的具体实现方式不做限定。
第九方面,提供一种通信装置,包括:逻辑电路和输入输出接口,该输入输出接口用于与该通信装置之外的模块通信;该逻辑电路用于运行计算机程序或指令以执行上述任一方面的任一项设计所提供的方法。该通信装置可以为上述任一方面中的管理节点或终端节 点,或者包含上述管理节点或终端节点的装置,或者上述管理节点或终端节点中包含的装置,比如芯片。
或者,该输入输出接口可以为代码/数据读写接口电路,或通信接口,该输入输出接口用于接收计算机程序或指令(计算机程序或指令存储在存储器中,可能直接从存储器读取,或可能经过其他器件)并传输至该输入输出接口,以使该输入输出接口运行计算机程序或指令以执行上述任一方面的方法。
可选的,该通信装置可以为芯片。
第十方面,提供一种计算机程序产品,该计算机程序产品包括:计算机程序(也可以称为代码,或指令),当该计算机程序被运行时,使得计算机执行上述任一方面或任一方面中的任一项实现所提供的方法。
第十一方面,提供一种计算机可读介质,该计算机可读介质存储有计算机程序(也可以称为代码,或指令)当其在计算机上运行时,使得计算机执行上述任一方面或任一方面中的任一项实现所提供的方法。
第十二方面,提供一种芯片系统,该芯片系统包括处理器和接口,用于支持通信装置实现上述任一方面或任一方面中的任一项实现所提供的功能。在一种可能的设计中,芯片系统还包括存储器,用于保存前述通信装置的必要的信息和数据。该芯片系统,可以由芯片构成,也可以包括芯片和其他分立器件。
第十三方面,提供一种芯片装置,该芯片装置包括输入接口和/或输出接口。该输入接口可以实现上述任一方面或任一方面中的任一项实现所提供的接收功能,该输出接口可以实现上述任一方面或任一方面中的任一项实现所提供的发送功能。
第十四方面,提供一种功能实体,该功能实体用于实现上述任一方面或任一方面中的任一项实现所提供的方法。
第十五方面,提供一种通信系统,包括用于执行上述第一方面中的方法的管理节点和用于执行上述第二方面中的方法的终端节点。
其中,上述第二方面至第十五方面中任一实现所带来的技术效果可参见上述第一方面所带来的技术效果,此处不再赘述。
附图说明
图1为一种车载无线短距通信系统的架构示意图;
图2为一种车载无线短距通信系统的架构示意图;
图3为一种GT协议在频段工作的示意图;
图4为一种T节点接入G节点的示意图;
图5为本申请实施例提供的一种通信过程示意图;
图6为本申请实施例提供的一种传输模式1的PDU格式示意图;
图7为本申请实施例提供的一种传输模式1的PDU格式示意图;
图8为本申请实施例提供的一种传输模式2的PDU格式示意图;
图9为本申请实施例提供的一种传输模式2的PDU格式示意图;
图10为本申请实施例提供的一种通信装置的结构示意图;
图11为本申请实施例提供的一种通信装置的结构示意图;
图12为本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
下面将结合附图对本申请作进一步地详细描述。
本申请实施例的技术方案可以应用于但不限于车载无线短距通信系统。车载无线短距通信技术(也称星闪技术)具有超低时延、超高可靠、精准同步等优势,适用于智能汽车、智能家居、智能终端和智能制造等场景的应用。例如,在智能汽车场景中的应用包括:沉浸式车载声场&降噪、无线交互投屏、以及360全景环视等,可以实现沉浸式交互体验,提高车辆安全性。
在一些可能的实现中,车载无线短距通信系统可以与移动通信系统结合使用,例如移动通信系统包括但不限于第四代(4th Generation,4G)通信系统(例如,长期演进(long term evolution,LTE)系统),第五代移动通信(5th-generation,5G)通信系统(例如,新无线(new radio,NR)系统),及未来的移动通信系统如6G等移动通信系统。
如图1所示,车载无线短距通信系统中包括G节点和T节点,G节点为车载无线短距通信系统中发送数据调度信息的节点,T节点为车载无线短距通信系统中接收数据调度信息,以及根据数据调度信息发送数据的节点。其中G节点和T节点均可以为一个或多个,通常G节点为一个,T节点为多个。以智能汽车场景为例,车载无线短距通信系统的一种架构如图2所示,G节点包括汽车的域控制器(domain control unit,DCU)、T节点包括汽车的屏幕和扬声器等。域控制器是汽车每个功能域的核心,功能域可以划分为动力域(Power Train)、底盘域(Chassis)、车身域(Body/Comfort)、座舱域(Cockpit/Infotainment)、高级驾驶辅助系统(advanced driving assistance system,ADAS),或者功能域可以划分为车控域控制器(vehicle domain controller,VDC)、智能驾驶域控制器(ADAS\AD domain controller,ADC)、智能座舱域控制器(cockpit domain controller,CDC)。
为了便于描述,将车载无线短距通信系统称为GT系统,将车载无线短距通信系统中的短距协议称为GT协议。GT协议与Wi-Fi协议相似,支持在unlicense频段工作。GT协议引入了非连续接收模式,即支持超帧号连续的超帧在不连续的时间资源上传输,以保证GT协议中的节点和Wi-Fi协议中的节点在unlicense频段的共存,如图3所示,白色部分为GT协议占用的用于数据帧(简称为GT数据帧)传输的时间,黑色部分为Wi-Fi协议占用的用于数据帧(简称为Wi-Fi数据帧)传输的时间,阴影部分为GT协议非连续接收模式下占用的用于传输前导信息的时间,前导信息包括同步信号(synchronization,sync)1、固定长度部分、同步信号2和可变长度部分,其中Wi-Fi节点和GT节点通过抢占空口时间实现共存。
由于非连续接收模式下,GT系统通过抢占空口时间的方式实现和Wi-Fi等其他系统的共存,导致不同T节先后接入G节点后无法获得准确的接入时间间隔。
例如图4所示,T1节点在t1时刻接入G节点,T2节点在t2时刻接入G节点,但是T1节点和T2节点不感知接入G节点的时间,如果需要T1节点和T2节点在同一时刻播放来自G节点的同一帧立体声,由于T节点之间的接入时间间隔难以确定,可能会导致T1节点和T2节点之间的播放存在额外的时延差,破坏立体声效果。
基于此,本申请实施例提供了一种通信方法,用以实现车载无线短距通信系统中T节点之间的时间同步。图5为一种通信过程的示意图,包括如下步骤:
S501:若处于非连续接收模式,管理节点确定指示信息。
S502:管理节点发送指示信息。相应的,终端节点接收指示信息。
非连续接收模式指支持超帧号连续的超帧在不连续的时间资源上传输,因此若处于非连续接收模式下,管理节点可以通过指示信息指示第一无线帧与参考超帧的第二无线帧之间的偏移。
其中第一无线帧为发送指示信息的时刻对应的无线帧,即第一无线帧与发送指示信息的时刻有关,或者说第一无线帧与该指示信息所在的位置(如所在的无线帧)相关,比如第一无线帧与该指示信息所在的无线帧为同一无线帧,或者第一无线帧与该指示信息所在的无线帧不是同一无线帧但根据预设规则可以根据该指示信息所在的无线帧确定出第一无线帧的位置。示例的,第一无线帧可以为用于发送该指示信息的超帧中的第n个无线帧,n=1,…,N,N为正整数,N小于或等于超帧中的无线帧总个数;当n取1时,第一无线帧为超帧中的第一个无线帧,当n取N时,第一无线帧为超帧中的最后一个无线帧。
参考超帧的超帧号取值为非负整数。示例的,参考超帧为0号超帧,即超帧号为0的超帧。GT系统中通常使用16比特(bits)来指示超帧号。可以理解的是,0号超帧仅为一个示例,对于能够实现多个终端节点之间时间同步的其他超帧号(例如但不限于1号超帧)也适用于本申请实施例。
参考超帧内的第二无线帧可以为参考超帧内的第m个无线帧,m=1,…,M,M为正整数,M小于或等于参考超帧的无线帧总个数。通常GT系统中1超帧=1毫秒(millisecond,ms)=48无线帧=48*640样点=30720样点,也就是说,1秒(second,s)=1000超帧=30720000样点,符号速率为30.72兆赫兹(mega hertz,MHz)。示例的,M为小于或等于48的正整数。当m取1时,第二无线帧为参考超帧内的第一个无线帧,当m取48时,第二无线帧为参考超帧内的最后一个无线帧。
一个可能的实现中,S502中,管理节点可以持续发送指示信息。
又一个可能的实现中,S502中,至少一个终端节点接入到管理节点,管理节点识别到至少一个终端节点接入后,向至少一个终端节点发送指示信息。终端节点接入管理节点可以是终端节点加入管理节点的通信域,也就是说,终端设备及其接入的管理节点在同一通信域内。
S503:终端节点根据指示信息,确定第一无线帧与第二无线帧之间的偏移。
在该方法中,管理节点通过指示第一无线帧与参考超帧的第二无线帧之间的偏移,可以指示第一无线帧与第二无线帧之间的时间差,因此终端节点可以感知自身与管理节点之间的时间偏移,从而以管理节点作为基准实现多个终端节点之间的时间同步。
一种可能的实现中,该指示信息具体可以指示第一无线帧与参考超帧的第二无线帧之间的无线帧个数,即第一无线帧与参考超帧中的第二无线帧之间的偏移为第一无线帧与参考超帧中的第二无线帧之间的无线帧个数,也就是说这里用无线帧个数表示偏移,来实现第一无线帧与第二无线帧之间的时间差的指示,无线帧个数的指示占用比特数更少,通信开销更少。示例的,该指示信息为无线帧号字段。
GT系统支持超帧号连续的超帧在不连续的时间资源上传输。管理节点传输数据使用的#N超帧(即N号超帧,或者说超帧号为N)在时间上与#N-1超帧(即N-1号超帧,或者说超帧号为N-1)不连续时,管理节点在#N超帧时间资源之前发送前导信息。非连续接收模式下,前导信息的起始时刻与无线帧时间粒度对齐,也就是说,前导信息的起始时刻 与0号超帧的起始时刻间隔了整数个无线帧。由于前导信息的长度是整数个无线帧,所以前导信息结束后的超帧之间也是无线帧时间粒度对齐的。因此在该实现中,可以通过无线帧个数来指示第一无线帧与第二无线帧之间的偏移(或时间差)。
该指示信息占用的比特数为正整数。
示例的,该指示信息可以占用22bits。由于GT系统使用16bits表示超帧号,每216个超帧后,超帧号重复出现,也就是说,每(216=65536)个超帧,即65.536秒后,超帧号重复出现,而每个超帧为48个无线帧,16bits可以表示216*48个无线帧,因此216*48个无线帧可以采用22(即16+6)bits表示,即该指示信息可以采用22bits表示,在指示第一无线帧与第二无线帧之间的无线帧个数时可以避免重复指示。
又一示例的,该指示信息可以占用28bits。由于非连续接收模式下,GT与Wi-Fi时分复用,在一些场景(如超帧不连续的场景)下GT超帧的时分占有率可能较低,该指示信息采用28bits表示(假设无线帧的比特数在22bits的基础上增加6bits),对应的可以支持GT占用率约为1.6%的场景。
又一示例的,该指示信息可以占用32bits。
下面以几个可能的实现方式对上述S502进行说明。
实现方式1:指示信息携带在前导信息中,即在上述S502中,管理节点发送前导信息,相应的,终端节点接收前导信息。
GT系统中前导信息包含但不限于:第一组同步序列部分(如图3中的sync1)、固定长度部分(以下简称为sig1)、第二组同步序列部分(如图3中的sync2)和可变长度部分(以下简称为sig2)等中的一个或多个。
第一组同步序列部分和第二组同步序列部分传输的内容都是同步序列,不传输信息比特,一般不新增信令字段,因此指示信息可以携带在前导信息的固定长度部分和/或可变长度部分。
实现方式1.1:前导信息的可变长度部分(sig2)中携带指示信息。
GT系统中,可变长度部分包含有效数据符号和填充部分,有效数据符号采用扩展循环前缀的循环前缀(cyclic prefix,CP)-正交频分复用(orthogonal frequency division multiplexing,OFDM)符号。假设前导信息的起始时刻与640时间戳(time stamp,Ts)时间长度粒度对齐,可变长度部分中填充部分的长度是使得超帧的起始时刻与640Ts时间长度粒度对齐的最短的长度,例如填充部分长度可以为0。
一种可能的实现中,可变长度部分发送管理链路系统消息,管理链路系统消息中包含指示信息。
示例的,管理链路系统消息为Glink-SystemInfo-Message,Glink-SystemInfo-Message中包含指示信息,Glink为管理节点到终端节点的通信链路,该链路可以承载管理节点到终端节点的数据信道、控制信道、广播信道、同步信号等。
管理链路系统消息主要用来承载通信域系统消息(DomainSysInfo),通信域系统消息一般是通信域中的管理节点向其通信域的终端节点以广播方式发送。可选的,管理链路系统消息包含通信域系统消息,通信域系统消息包含指示信息。
GT系统中Glink-SystemInfo-Message如下所示,其中Glink-SystemInfo-Message包含Glink-SystemInfo-Message-信息元素(Information Element,IE),Glink-SystemInfo-Message-IE包含DomainSysInfo:
GT系统中DomainSysInfo如下所示,其中DomainSysInfo包含通信域系统消息信息元素(DomainSysInfo-IEs):
可选的,DomainSysInfo-IEs可以新增指示信息,例如该指示信息为无线帧号字段,字段类型为可选(OPTIONAL)。示例的,DomainSysInfo-IEs如下所示,包含通信域系统消息周期(domainSysInfoPeriod)字段、通信域系统消息持续时间(domainSysInfoOnDuration)字段、通信域名称(domainName)字段、通信域标识(domainID)字段、多通信域同步信息(multiDomainSyncInfo)字段、载波信道配置(carrierChannelConf)字段、非接触式资源(nonContentionAccessResource)字段、标称配置(p0-NominalConfig)字段、资源集配置(ack-ResourceSetConf)字段、超帧模式(sr-SuperFrameMode)字段、域协调(domainCoordination)字段、访问控制(accessControl)字段、密钥协商(keyAlgNegotiation)字段、测试模式指示(testModeIndication)字段、非临界扩展(nonCriticalExtension)字段和无线帧号字段。
其中,domainSysInfoPeriod的枚举值(ENUMERATED)包括SF64、SF128、SF256、SF512,其中SF64指示发送DomainSysInfo的超帧的起始编号为64的倍数,SF128指示发送DomainSysInfo的超帧的起始编号为128的倍数,SF256指示发送DomainSysInfo的超帧的起始编号为256的倍数,SF512指示发送DomainSysInfo的超帧的起始编号为512的倍数。domainSysInfoOnDuration的枚举值包括SF64、SF128、SF256、SF512。multiDomainSyncInfo字段的长度为从1到25的区间,或者固定的长度8。accessControl字段的长度为固定的长度4。keyAlgNegotiation字段的长度为固定的长度32。testModeIndication字段的枚举值为真(true)、假(false)。无线帧号字段,占用32bits,字段类型为OPTIONAL。

另一种可能的实现中,可变长度部分中包含新增消息,该新增消息中包含指示信息。例如该新增消息为Sig2-extend-message。
该新增消息在管理链路系统消息之外,例如在管理链路系统消息之前增加该新增消息占用的比特位数(如新增22bit或28bits或32bits),又如在管理链路系统消息之后增加该新增消息占用的比特位数(如新增22bit或28bits或32bits),又如该新增消息可以按照ASN.1格式定义,可以如下表示:
该指示信息(如无线帧号字段)的具体含义包括但不限于以下多个中的一个:
指示信息具体指示传输可变长度部分的第n个无线帧与参考超帧的第二无线帧(如第m个无线帧)之间的偏移/无线帧个数,即第一无线帧为前导信息的可变长度部分的第n个无线帧;
指示信息具体指示传输可变长度部分的第一个无线帧(如n=1的情况下)与参考超帧的第二无线帧(如第一个无线帧,如m=1的情况下)之间的偏移/无线帧个数,即第一无线帧为前导信息的可变长度部分的第一个无线帧;
指示信息具体指示传输可变长度部分的最后一个无线帧(如n=N的情况下)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的可变长度部分的最后一个无线帧;
指示信息具体指示可变长度部分结束后传输的第二超帧(如第一个超帧或其他超帧)中的第一个无线帧(或者第一个超帧的其他无线帧)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的可变长度部分结束后传输的第二超帧(如第一个 超帧)中的第一个无线帧;
指示信息具体指示传输前导信息的第一个无线帧(或其他无线帧)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的第一个无线帧。
该实现方式1.1在可变长度部分携带指示信息,不会增加其它部分(第一组同步序列、第二组同步序列、固定长度部分)的码率,不会影响其它部分的解调性能,有利于保证通信系统的稳定性,并且不会额外占用空口资源,也不会占用过大的开销。
实现方式1.2:前导信息的固定长度部分(sig1)中携带指示信息。
GT系统中,固定长度部分包含14个CP-OFDM符号,共传输131信息比特,相当于2个无线帧的长度。该实现方式中可以在固定长度部分新增指示信息,如在固定长度部分增加该指示信息占用的比特数(如增加22bit或28bits或32bits,即将固定长度部分的长度由131bits增加至153bits或增加至159bits或者增加至163bits)。示例的,该固定长度部分可以增加在固定长度部分的131bits之后,或者可以增加在固定长度部分的131bits之前。
该指示信息(如无线帧号字段)的具体含义包括但不限于以下多个中的一个:
指示信息具体指示传输固定长度部分的第n个无线帧与参考超帧的第二无线帧(如第m个无线帧)之间的偏移/无线帧个数,即第一无线帧为前导信息的固定长度部分的第n个无线帧;
指示信息具体指示传输固定长度部分的第一个无线帧(如n=1的情况下)与参考超帧的第二无线帧(如第一个无线帧,如m=1的情况下)之间的偏移/无线帧个数,即第一无线帧为前导信息的固定长度部分的第一个无线帧;
指示信息具体指示传输固定长度部分的最后一个无线帧(如n=N的情况下)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的固定长度部分的最后一个无线帧;
指示信息具体指示固定长度部分结束后传输的第三超帧(如第一个超帧或其他超帧)中的第一个无线帧(或第一个超帧的其他无线帧)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的固定长度部分结束后传输的第三超帧(如第一个超帧)中的第一无线帧;
指示信息具体指示传输前导信息的第一个无线帧(或其他无线帧)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为前导信息的第一个无线帧。
实现方式2:指示信息携带在超帧中传输的系统消息中,即在上述S502中,管理节点在第一超帧中的系统消息中,发送指示信息,相应的,终端节点接收第一超帧。
第一超帧为前导信息结束后的超帧,即用于传输数据帧的超帧。可选的,第一超帧为前导信息结束后的第一个超帧(或者可以为其他超帧),一般的,指示信息越早指示,即终端节点越早接收到指示信息,可以越快实现终端节点之间的时间同步。
系统消息在非连续接收模式的超帧中也会被发送,因此该实现方式中可以在超帧中传输的系统消息中携带指示信息。一种可能的实现中,由于上述实现方式1.1在前导信息的可变长度部分的系统消息中也可以携带指示信息,因此在非连续接收模式下如果指示信息在可变长度部分的系统消息中配置为发送,则在第一超帧中的系统消息中可以配置为不发送,反之,如果指示信息在可变长度部分的系统消息中配置为不发送,则在第一超帧中的系统消息中可以配置为发送,也就是说,非连续接收模式下,可变长度部分的系统消息和第一超帧中的系统消息中至少一个系统消息配置为发送指示信息。
该指示信息(如无线帧号字段)的具体含义包括但不限于以下多个中的一个:
指示信息具体指示传输系统的第一超帧的第n个无线帧与参考超帧的第二无线帧(如第m个无线帧)之间的偏移/无线帧个数,即第一无线帧为第一超帧中的第一个无线帧;
指示信息具体指示传输系统消息的多个无线帧的第一个无线帧(或者其他无线帧)与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为第一超帧中传输系统消息的多个无线帧中的第一个无线帧,如第一无线帧为当前超帧(如第一超帧)中的第一无线帧;
指示信息具体指示传输系统的多个无线帧的最后一个无线帧与参考超帧的第二无线帧之间的偏移/无线帧个数,即第一无线帧为第一超帧中传输系统消息的多个无线帧中的最后一个无线帧,如第一无线帧为当前超帧(如第一超帧)中的最后一个无线帧。
实现方式3:指示信息携带在授时管理帧中,即在上述S502中,管理节点广播授时管理帧,授时管理帧携带指示信息,相应的,终端节点接收授时管理帧。
授时管理帧用于授时。授时管理帧可以为系统消息,采用类似系统消息的调度方式进行周期性调度,可以达到终端节点确定时间的目的。在一种可能的实现中,授时管理帧为GT系统中新增的系统消息,如管理链路授时消息Glink-TimeInfo-Message。
示例的,授时管理帧可以如下所示,其中Glink-TimeInfo-Message包含Glink-TimeInfo-Message-IE,Glink-TimeInfo-Message-IE包含frameCntInfo:
可选的,frameCntInfo中可以携带指示信息。
实现方式4:指示信息携带在链路控制层包头中进行指示,即在上述S502中,管理节点发送链路控制层数据包,链路控制层数据包的包头中携带指示信息,相应的,终端节点接收链路控制层数据包。
一般的,物理层传输的数据会经过链路控制(link control,LC)层组包,LC层可以包含一个或多个链路控制实体,其中一个链路控制实体与一个逻辑信道对应。
LC层为上层提供数据传输服务,支持多种不同类型的传输模式,支持的一些传输模式参见表1所示:
表1

实现方式4.1:采用传输模式1传输数据时,在链路控制层数据包的包头中携带指示信息。
传输模式1的一种协议数据单元(protocol data unit,PDU)格式如图6所示,该PDU格式不携带分段偏移值。PDU格式包括L个字节,字节1取不同的值表示不同的含义,如字节1为0表示数据/控制,字节1为1表示查询,字节1为2或3表示分段指示,字节1为4或5为预留,字节1为6或7表示顺序号。字节2和字节3表示顺序号,字节4和5表示上层协议指示,字节6表示数据,…,字节L-3表示完整性保护第一字节(可选),字节L-2表示完整性保护第二字节(可选),字节L-1表示完整性保护第三字节(可选),字节L表示完整性保护第四字节(可选)。示例的,可以在该PDU格式的字节5和字节6之间新增指示信息(如新增无线帧号)。若指示信息占32bits,则在该PDU格式的字节5和字节6之间新增4个字节来表示指示信息,如图6中的新增字节5.1至新增字节5.4。
传输模式1的一种PDU格式如图7所示,该PDU格式携带分段偏移值。PDU格式包括L个字节,字节1取不同的值表示不同的含义,如字节1为0表示数据/控制,字节1为1表示查询,字节1为2或3表示分段指示,字节1为4或5为预留,字节1为6或7表示顺序号。字节2和字节3表示顺序号,字节4和5表示分段偏移值,字节6和7表示上层协议指示,字节8表示数据,…,字节L-3表示完整性保护第一字节(可选),字节L-2表示完整性保护第二字节(可选),字节L-1表示完整性保护第三字节(可选),字节L表示完整性保护第四字节(可选)。示例的,可以在该PDU格式的字节7和字节8之间新增指示信息(如新增无线帧号)。若指示信息占32bits,则在该PDU格式的7和字节8之间新增4个字节来表示指示信息,如图7中的新增字节7.1至新增字节7.4。
实现方式4.2:采用传输模式2传输数据时,在链路控制层数据包的包头中携带指示信息。
传输模式2的一种PDU格式如图8所示,该PDU格式不携带分段偏移值。PDU格式包括L个字节,字节1取不同的值表示不同的含义,如字节1为0或1表示分段指示,字节1为2或3或4或5为预留,字节1为6或7表示顺序号。字节2和字节3表示顺序号,字节4和5表示上层协议指示,字节6表示数据,…,字节L-3表示完整性保护第一字节(可选),字节L-2表示完整性保护第二字节(可选),字节L-1表示完整性保护第三字节(可选),字节L表示完整性保护第四字节(可选)。示例的,可以在该PDU格式的字节5和字节6之间新增指示信息(如新增无线帧号)。若指示信息占32bits,则在该PDU格式的字节5和字节6之间新增4个字节来表示指示信息,如图8中的新增字节5.1至新增字节5.4。
传输模式2的一种PDU格式如图9所示,该PDU格式携带分段偏移值。PDU格式包括L个字节,字节1取不同的值表示不同的含义,如字节1为0或1表示分段指示,字节1为2或3或4或5为预留,字节1为6或7表示顺序号。字节2和字节3表示顺序号,字节4和5表示上层协议指示,字节6和7表示分段偏移值,字节8表示数据,…,字节L-3表示完整性保护第一字节(可选),字节L-2表示完整性保护第二字节(可选),字节 L-1表示完整性保护第三字节(可选),字节L表示完整性保护第四字节(可选)。示例的,可以在该PDU格式的字节7和字节8之间新增指示信息(如新增无线帧号)。若指示信息占32bits,则在该PDU格式的7和字节8之间新增4个字节来表示指示信息,如图9中的新增字节7.1至新增字节7.4。
采用本申请实施例提供的通信方法,终端节点可以感知自身与管理节点的时间偏移/时间差,从而以管理节点作为基准实现终端节点之间的时间同步。
假设第一终端节点与管理节点之间的偏移为Δt1,第二终端节点与管理节点之间的偏移为Δt2,Δt1小于Δt2。为了实现第一终端节点和第二终端节点之间的时间同步,示例的,管理节点可以在第一时间点将数据帧发送给第二终端节点,在第一时间点后(Δt2-Δt1)的时间点,将数据帧发送给第一终端节点,第一终端节点和第二终端节点在同一时间点接收到数据帧后播放,实现第一终端节点和第二终端节点之间同时播放数据帧。又一实例的,管理节点可以同时将数据帧发送给第一终端节点和第二终端节点,第一终端节点接收数据帧后(Δt2-Δt1)的时间点播放,第二终端节点接收到数据帧后播放,可以实现第一终端节点和第二终端节点之间同时播放数据帧。
可以理解的是,本申请实施例中提供的实现方式可以单独使用,也可以结合使用。本申请实施例中涉及的“第一个超帧”、“第一个无线帧”、“最后一个无线帧”等仅为示例,而不构成限定,对于能够实现终端节点之间时间同步的其他超帧号、无线帧号也适用于本申请实施例。
本申请中的“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本申请中所涉及的多个,是指两个或两个以上。
另外,需要理解的是,在本申请的描述中,“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。
基于与上述通信方法的同一技术构思,本申请实施例还提供了一种通信装置。如图10所示,通信装置1000中包含处理单元1001和收发单元1002,通信装置1000可以用于实现上述方法实施例中描述的方法。装置1000应用于管理节点或终端节点,也可以是应用于管理节点或终端节点中的芯片,也可以是应用于包含管理节点或终端节点的设备。
在一个实施例中,装置1000应用于管理节点。
具体的,处理单元1001,用于若处于非连续接收模式,管理节点确定指示信息;
收发单元1002,用于管理节点发送指示信息,指示信息指示第一无线帧与参考超帧中的第二无线帧之间的偏移,第一无线帧与发送指示信息的时刻有关。
在一个实现方式中,第一无线帧与参考超帧中的第二无线帧之间的偏移,为第一无线帧与参考超帧中的第二无线帧之间的无线帧个数。
在一个实现方式中,收发单元1002,具体用于发送前导信息,前导信息的可变长度部分中携带指示信息。
在一个实现方式中,可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,Glink-SystemInfo-Message中包含指示信息。
在一个实现方式中,第一无线帧为:前导信息的可变长度部分的第一个无线帧;或者前导信息的可变长度部分的最后一个无线帧;或者前导信息的可变长度部分结束后传输的 第一个超帧中的第一个无线帧;或者前导信息的第一个无线帧。
在一个实现方式中,收发单元1002,具体用于发送前导信息,前导信息的固定长度部分中携带指示信息。
在一个实现方式中,第一无线帧为:前导信息的固定长度部分的第一个无线帧;或者前导信息的固定长度部分的最后一个无线帧;或者前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
在一个实现方式中,收发单元1002,具体用于在第一超帧中的系统消息中,发送指示信息,第三超帧为前导信息结束后的第一个超帧。
在一个实现方式中,第一无线帧为:第一超帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的最后一个无线帧。
在一个实现方式中,收发单元1002,具体用于广播授时管理帧,授时管理帧用于授时,授时管理帧携带指示信息。
在一个实现方式中,收发单元1002,具体用于发送链路控制层数据包,链路控制层数据包的包头中携带指示信息。
在一个实施例中,装置1000应用于终端节点。
具体的,收发单元1002,用于若处于非连续接收模式,终端节点接收指示信息,指示信息指示第一无线帧与参考超帧中的第二无线帧之间的偏移,第一无线帧与管理节点发送指示信息的时刻有关;
处理单元1001,用于根据指示信息,确定第一无线帧与第二无线帧之间的偏移。
在一个实现方式中,第一无线帧与参考超帧中的第二无线帧之间的偏移,为第一无线帧与参考超帧中的第二无线帧之间的无线帧个数。
在一个实现方式中,收发单元1002,具体用于接收前导信息,前导信息的可变长度部分中携带指示信息。
在一个实现方式中,可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,Glink-SystemInfo-Message中包含指示信息。
在一个实现方式中,第一无线帧为:前导信息的可变长度部分的第一个无线帧;或者前导信息的可变长度部分的最后一个无线帧;或者前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者前导信息的第一个无线帧。
在一个实现方式中,收发单元1002,具体用于接收前导信息,前导信息的固定长度部分中携带指示信息。
在一个实现方式中,第一无线帧为:前导信息的固定长度部分的第一个无线帧;或者前导信息的固定长度部分的最后一个无线帧;或者前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
在一个实现方式中,收发单元1002,具体用于接收第一超帧,第一超帧中的系统消息中携带指示信息,第一超帧为前导信息结束后的第一个超帧。
在一个实现方式中,第一无线帧为:第一超帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的第一个无线帧;或者第一超帧中传输系统消息的多个无线帧中的最后一个无线帧。
在一个实现方式中,收发单元1002,具体用于接收授时管理帧,授时管理帧用于授时, 授时管理帧携带指示信息。
在一个实现方式中,收发单元1002,具体用于接收链路控制层数据包,链路控制层数据包的包头中携带指示信息。
需要说明的是,本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,该集成的单元可以作为计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例方法的全部或部分步骤。
如图11所示,本申请实施例还提供了一种通信装置1100的结构示意图。通信装置1100可用于实现上述方法实施例中描述的方法,可以参见上述方法实施例中的说明。例如通信装置1100能够执行上述图5的方法中由管理节点或终端节点执行的各个步骤。
通信装置1100包括一个或多个处理器1101。处理器1101可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理,中央处理器可以用于对通信装置(如,基站、终端、或芯片等)进行控制,执行软件程序,处理软件程序的数据。通信装置可以包括收发单元,用以实现信号的输入(接收)和输出(发送)。例如,收发单元可以为收发器,射频芯片等。
通信装置1100包括一个或多个处理器1101,一个或多个处理器1101可实现上述所示的实施例中的方法。可选的,处理器1101除了实现上述所示的实施例的方法,还可以实现其他功能。
一种设计中,处理器1101可以执行指令,使得装置1100执行上述方法实施例中描述的方法。指令可以全部或部分存储在处理器1101内,如指令1103可以全部或部分存储在处理器1101中,或者指令1103存储在处理器1101中,以及指令1104存储在与处理器耦合的存储器1102中,处理器1101可以同步执行指令1103和指令1104使得通信装置1100执行上述方法实施例中描述的方法。指令1103和指令1104也称为计算机程序。
在又一种可能的设计中,通信装置1100还可以包括电路,电路可以实现前述方法实施例中的功能。
在又一种可能的设计中通信装置1100中可以包括一个或多个存储器1102,其上存有指令1104,指令可在处理器1101上被运行,使得装置1100执行上述方法实施例中描述的方法。可选的,存储器1102中还可以存储有数据。可选的处理器1101中也可以存储指令和/或数据。例如,一个或多个存储器1102可以存储上述实施例中所描述的对应关系,或者上述实施例中所涉及的相关的参数或表格等。处理器和存储器可以单独设置,也可以集成在一起。
在又一种可能的设计中,装置1100还可以包括收发器1105以及天线1106。处理器1101可以称为处理单元,对装置(终端或者基站)进行控制。收发器1105可以称为收发机、收发电路、或者收发单元等,用于通过天线1106实现装置的收发功能。
处理器可以是一个通用中央处理器(central processing unit,CPU)、微处理器、特定 应用集成电路(application-specific integrated circuit,ASIC)、一个或多个用于控制本申请方案程序执行的集成电路、通用处理器、数字信号处理器(digital signal processor,DSP)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以存储介质中,该存储介质位于存储器。
存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchronous link DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。存储器可以是独立存在,通过通信线路与处理器相连接。存储器也可以和处理器集成在一起。
本申请实施例还提供了一种通信系统,包括管理节点和终端节点,管理节点和终端节点可以实现上述方法实施例的通信方法。
本申请实施例还提供了一种计算机可读介质,其上存储有计算机程序,该计算机程序被计算机执行时实现上述方法实施例的通信方法。
本申请实施例还提供了一种计算机程序产品,包括计算机程序,该计算机程序被计算机执行时实现上述方法实施例的通信方法。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机指令时,全部或部分地产生按照本申请实施例的流程或功能。计算机可以是上述通信装置。计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。计算机可读存储介质可以是上述存储介质或上述存储器。
在一种可能的设计中,当上述通信装置是芯片,如网络设备中的芯片时,或者,如终端设备中的芯片时,处理器1101可以是一个或多个逻辑电路,发送单元或者接收单元或者收发器1105可以是输入输出接口,又或者称为通信接口,或者接口电路,或接口等等。或者收发器1105还可以是发送单元和接收单元,发送单元可以是输出接口,接收单元可以是输入接口,该发送单元和接收单元集成于一个单元,例如输入输出接口。如图12所示,图12所示的通信装置1200包括逻辑电路1201和接口电路1202。即上述处理单元或者处理器1101可以用逻辑电路1201实现,收发单元或者收发器1105可以用接口电路1202实 现。其中,该逻辑电路1201可以为芯片、处理电路、集成电路或片上系统(system on chip,SoC)芯片等,接口电路1202可以为通信接口、输入输出接口等。本申请实施例中,逻辑电路和接口电路还可以相互耦合。对于逻辑电路和接口电路的具体连接方式,本申请实施例不作限定。
在本申请的一些实施例中,该逻辑电路1201和接口电路1202可用于执行上述管理节点或终端节点执行的功能或操作等。接口电路1202可以用于接收来自通信装置1200之外的其它通信装置的信号并传输至逻辑电路1201或将来自逻辑电路1201的信号发送给通信装置1200之外的其它通信装置。逻辑电路1201可以通过执行代码指令用于实现上述方法实施例。
示例性地,接口电路1202若处于非连续接收模式,发送指示信息,指示信息指示第一无线帧与参考超帧的第二无线帧之间的偏移,第一无线帧与发送指示信息的时刻有关。通信装置执行的功能或操作可以参照前述方法实施例,在此不再赘述。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。
总之,以上仅为本申请技术方案的实施例而已,并非用于限定本申请的保护范围。凡在本申请的原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (50)

  1. 一种通信方法,应用于包括有管理节点的车载无线短距通信系统,其特征在于,所述方法包括:
    若处于非连续接收模式,所述管理节点确定指示信息;
    所述管理节点发送所述指示信息,所述指示信息用于指示第一无线帧与参考超帧中的第二无线帧之间的偏移,所述第一无线帧与发送所述指示信息的时刻有关。
  2. 如权利要求1所述的方法,其特征在于,所述第一无线帧与参考超帧中的第二无线帧之间的偏移,为所述第一无线帧与所述参考超帧中的第二无线帧之间的无线帧个数。
  3. 如权利要求1或2所述的方法,其特征在于,所述管理节点发送指示信息,包括:
    所述管理节点发送前导信息,所述前导信息的可变长度部分中携带所述指示信息。
  4. 如权利要求3所述的方法,其特征在于,所述可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,所述Glink-SystemInfo-Message中包含所述指示信息。
  5. 如权利要求3或4所述的方法,其特征在于,所述第一无线帧为:
    所述前导信息的可变长度部分的第一个无线帧;或者
    所述前导信息的可变长度部分的最后一个无线帧;或者
    所述前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者
    所述前导信息的第一个无线帧。
  6. 如权利要求1或2所述的方法,其特征在于,所述管理节点发送指示信息,包括:
    所述管理节点发送前导信息,所述前导信息的固定长度部分中携带所述指示信息。
  7. 如权利要求6所述的方法,其特征在于,所述第一无线帧为:
    所述前导信息的固定长度部分的第一个无线帧;或者
    所述前导信息的固定长度部分的最后一个无线帧;或者
    所述前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
  8. 如权利要求1或2所述的方法,其特征在于,所述管理节点发送指示信息,包括:
    所述管理节点在第一超帧中的系统消息中,发送所述指示信息,所述第一超帧为前导信息结束后的第一个超帧。
  9. 如权利要求8所述的方法,其特征在于,所述第一无线帧为:
    所述第一超帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的最后一个无线帧。
  10. 如权利要求1或2所述的方法,其特征在于,所述管理节点发送指示信息,包括:
    所述管理节点广播授时管理帧,所述授时管理帧用于授时,所述授时管理帧携带所述指示信息。
  11. 如权利要求1或2所述的方法,其特征在于,所述管理节点发送指示信息,包括:
    所述管理节点发送链路控制层数据包,所述链路控制层数据包的包头中携带所述指示信息。
  12. 一种通信方法,应用于包括有终端节点的车载无线短距通信系统,其特征在于,所述方法包括:
    若处于非连续接收模式,所述终端节点接收指示信息,所述指示信息用于指示第一无 线帧与参考超帧中的第二无线帧之间的偏移,所述第一无线帧与发送所述指示信息的时刻有关;
    所述终端节点根据所述指示信息,确定所述第一无线帧与所述第二无线帧之间的偏移。
  13. 如权利要求12所述的方法,其特征在于,所述第一无线帧与参考超帧中的第二无线帧之间的偏移,为所述第一无线帧与所述参考超帧中的第二无线帧之间的无线帧个数。
  14. 如权利要求12或13所述的方法,其特征在于,所述终端节点接收指示信息,包括:
    所述终端节点接收前导信息,所述前导信息的可变长度部分中携带所述指示信息。
  15. 如权利要求14所述的方法,其特征在于,所述可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,所述Glink-SystemInfo-Message中包含所述指示信息。
  16. 如权利要求14或15所述的方法,其特征在于,所述第一无线帧为:
    所述前导信息的可变长度部分的第一个无线帧;或者
    所述前导信息的可变长度部分的最后一个无线帧;或者
    所述前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者
    所述前导信息的第一个无线帧。
  17. 如权利要求12或13所述的方法,其特征在于,所述终端节点接收指示信息,包括:
    所述终端节点接收前导信息,所述前导信息的固定长度部分中携带所述指示信息。
  18. 如权利要求17所述的方法,其特征在于,所述第一无线帧为:
    所述前导信息的固定长度部分的第一个无线帧;或者
    所述前导信息的固定长度部分的最后一个无线帧;或者
    所述前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
  19. 如权利要求12或13所述的方法,其特征在于,所述终端节点接收指示信息,包括:
    所述终端节点接收第一超帧,所述第一超帧中的系统消息中携带所述指示信息,所述第一超帧为前导信息结束后的第一个超帧。
  20. 如权利要求19所述的方法,其特征在于,所述第一无线帧为:
    所述第一超帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的最后一个无线帧。
  21. 如权利要求12或13所述的方法,其特征在于,所述终端节点接收指示信息,包括:
    所述终端节点接收授时管理帧,所述授时管理帧用于授时,所述授时管理帧携带所述指示信息。
  22. 如权利要求12或13所述的方法,其特征在于,所述终端节点接收指示信息,包括:
    所述终端节点接收链路控制层数据包,所述链路控制层数据包的包头中携带所述指示信息。
  23. 一种通信装置,应用于车载无线短距通信系统,其特征在于,包括:
    处理单元,用于若处于非连续接收模式,确定指示信息;
    收发单元,用于发送所述指示信息,所述指示信息指示第一无线帧与参考超帧中的第二无线帧之间的偏移,所述第一无线帧与发送所述指示信息的时刻有关。
  24. 如权利要求23所述的装置,其特征在于,所述第一无线帧与参考超帧中的第二无线帧之间的偏移,为所述第一无线帧与所述参考超帧中的第二无线帧之间的无线帧个数。
  25. 如权利要求23或24所述的装置,其特征在于,所述收发单元,具体用于发送前导 信息,所述前导信息的可变长度部分中携带所述指示信息。
  26. 如权利要求25所述的装置,其特征在于,所述可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,所述Glink-SystemInfo-Message中包含所述指示信息。
  27. 如权利要求25或26所述的装置,其特征在于,所述第一无线帧为:
    所述前导信息的可变长度部分的第一个无线帧;或者
    所述前导信息的可变长度部分的最后一个无线帧;或者
    所述前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者
    所述前导信息的第一个无线帧。
  28. 如权利要求23或24所述的装置,其特征在于,所述收发单元,具体用于发送前导信息,所述前导信息的固定长度部分中携带所述指示信息。
  29. 如权利要求28所述的装置,其特征在于,所述第一无线帧为:
    所述前导信息的固定长度部分的第一个无线帧;或者
    所述前导信息的固定长度部分的最后一个无线帧;或者
    所述前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
  30. 如权利要求23或24所述的装置,其特征在于,所述收发单元,具体用于在第一超帧中的系统消息中,发送所述指示信息,所述第一超帧为前导信息结束后的第一个超帧。
  31. 如权利要求30所述的装置,其特征在于,所述第一无线帧为:
    所述第一超帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的最后一个无线帧。
  32. 如权利要求23或24所述的装置,其特征在于,所述收发单元,具体用于广播授时管理帧,所述授时管理帧用于授时,所述授时管理帧携带所述指示信息。
  33. 如权利要求23或24所述的装置,其特征在于,所述收发单元,具体用于发送链路控制层数据包,所述链路控制层数据包的包头中携带所述指示信息。
  34. 一种通信装置,应用于车载无线短距通信系统,其特征在于,包括:
    收发单元,用于若处于非连续接收模式,接收指示信息,所述指示信息指示第一无线帧与参考超帧中的第二无线帧之间的偏移,所述第一无线帧与所述管理节点发送所述指示信息的时刻有关;
    处理单元,用于根据所述指示信息,确定所述第一无线帧与所述第二无线帧之间的偏移。
  35. 如权利要求34所述的装置,其特征在于,所述第一无线帧与参考超帧中的第二无线帧之间的偏移,为所述第一无线帧与所述参考超帧中的第二无线帧之间的无线帧个数。
  36. 如权利要求34或35所述的装置,其特征在于,所述收发单元,具体用于接收前导信息,所述前导信息的可变长度部分中携带所述指示信息。
  37. 如权利要求36所述的装置,其特征在于,所述可变长度部分包括管理链路系统消息Glink-SystemInfo-Message,所述Glink-SystemInfo-Message中包含所述指示信息。
  38. 如权利要求36或37所述的装置,其特征在于,所述第一无线帧为:
    所述前导信息的可变长度部分的第一个无线帧;或者
    所述前导信息的可变长度部分的最后一个无线帧;或者
    所述前导信息的可变长度部分结束后传输的第一个超帧中的第一个无线帧;或者
    所述前导信息的第一个无线帧。
  39. 如权利要求34或35所述的装置,其特征在于,所述收发单元,具体用于接收前导信息,所述前导信息的固定长度部分中携带所述指示信息。
  40. 如权利要求39所述的装置,其特征在于,所述第一无线帧为:
    所述前导信息的固定长度部分的第一个无线帧;或者
    所述前导信息的固定长度部分的最后一个无线帧;或者
    所述前导信息的固定长度部分结束后传输的第一个超帧中的第一个无线帧。
  41. 如权利要求34或35所述的装置,其特征在于,所述收发单元,具体用于接收第一超帧,所述第一超帧中的系统消息中携带所述指示信息,所述第一超帧为前导信息结束后的第一个超帧。
  42. 如权利要求41所述的装置,其特征在于,所述第一无线帧为:
    所述第一超帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的第一个无线帧;或者
    所述第一超帧中传输所述系统消息的多个无线帧中的最后一个无线帧。
  43. 如权利要求34或35所述的装置,其特征在于,所述收发单元,具体用于接收授时管理帧,所述授时管理帧用于授时,所述授时管理帧携带所述指示信息。
  44. 如权利要求34或35所述的装置,其特征在于,所述收发单元,具体用于接收链路控制层数据包,所述链路控制层数据包的包头中携带所述指示信息。
  45. 一种通信装置,其特征在于,包括处理器,所述处理器与存储器耦合;
    处理器,用于执行所述存储器中存储的计算机程序,以使得所述装置执行如权利要求1-22中任一项所述的方法。
  46. 一种计算机可读存储介质,其特征在于,包括计算机程序,当所述计算机程序在计算机上运行时,使得如权利要求1-22中任一项所述的方法被执行。
  47. 一种通信装置,其特征在于,所述通信装置包括:逻辑电路和接口电路;
    所述接口电路,用于与所述通信装置之外的模块通信;
    所述逻辑电路用于执行计算机程序,以使所述通信装置执行如权利要求1-22中任一项所述的方法。
  48. 一种计算机程序产品,其特征在于,包括计算机程序,当其在计算机上运行时,使得如权利要求1-22中任一项所述的方法被执行。
  49. 一种通信系统,其特征在于,包括用于执行如权利要求1-11中任一项所述方法的管理节点,和用于执行如权利要求12-22中任一项所述方法的终端节点。
  50. 一种芯片系统,其特征在于,所述芯片系统包括:
    处理器和存储器,所述处理器与所述存储器耦合,所述存储器用于存储程序或指令,当所述程序或指令被所述处理器执行时,实现如权利要求1-22任一项所述的方法。
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CN113518322A (zh) * 2020-04-10 2021-10-19 华为技术有限公司 无线通信方法和通信装置
CN114390645A (zh) * 2020-10-16 2022-04-22 展讯通信(上海)有限公司 控制信息的监听方法及相关产品
CN114390443A (zh) * 2020-10-16 2022-04-22 北京紫光展锐通信技术有限公司 广播信息的发送、接收方法和相关设备

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US20120188998A1 (en) * 2011-01-26 2012-07-26 Nxp B.V. Syncronizing wireless devices
CN113518322A (zh) * 2020-04-10 2021-10-19 华为技术有限公司 无线通信方法和通信装置
CN114390645A (zh) * 2020-10-16 2022-04-22 展讯通信(上海)有限公司 控制信息的监听方法及相关产品
CN114390443A (zh) * 2020-10-16 2022-04-22 北京紫光展锐通信技术有限公司 广播信息的发送、接收方法和相关设备

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