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WO2020019253A1 - 车联网设备之间的系统信息传输方法、装置及系统 - Google Patents

车联网设备之间的系统信息传输方法、装置及系统 Download PDF

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Publication number
WO2020019253A1
WO2020019253A1 PCT/CN2018/097252 CN2018097252W WO2020019253A1 WO 2020019253 A1 WO2020019253 A1 WO 2020019253A1 CN 2018097252 W CN2018097252 W CN 2018097252W WO 2020019253 A1 WO2020019253 A1 WO 2020019253A1
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WIPO (PCT)
Prior art keywords
system information
broadcast channel
physical broadcast
connected vehicle
information
Prior art date
Application number
PCT/CN2018/097252
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English (en)
French (fr)
Inventor
刘洋
赵群
Original Assignee
北京小米移动软件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to EP18927812.0A priority Critical patent/EP3829201B1/en
Priority to PCT/CN2018/097252 priority patent/WO2020019253A1/zh
Priority to US17/262,197 priority patent/US20210306829A1/en
Priority to CN201880000881.3A priority patent/CN109076321B/zh
Publication of WO2020019253A1 publication Critical patent/WO2020019253A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and in particular, to a method, a device, and a system for transmitting system information between connected devices in a car.
  • Telematics is a new automotive technology development direction that combines navigation and positioning, wireless communication, and remote sensing technologies.
  • vehicle-to-vehicle connected devices perform synchronization and information transmission between devices through broadcast system information.
  • an IoV device can send a synchronization signal and system information of the IoV device through broadcasting. After receiving another IoV device and the system information, the IoV device synchronizes the signal through the synchronization signal and communicates with the IoV devices communicate.
  • the present disclosure provides a method for transmitting system information between connected vehicle devices.
  • the technical solution is as follows:
  • a method for transmitting system information between connected devices in a car includes:
  • the first connected vehicle device sends a physical broadcast channel, and the physical broadcast channel carries first system information, where the first system information includes an extended indication, and the extended indication is used to indicate whether a second exists outside the physical broadcast channel. system message;
  • the second connected vehicle device receives the physical broadcast channel
  • the second IoV device receives the second system information sent by the first IoV device.
  • a method for transmitting system information between connected devices in a car includes:
  • the physical broadcast channel carries first system information
  • the first system information includes an extension indication
  • the extension indication is used to indicate whether there is a physical broadcast channel Second system information
  • receiving the second system information sent by the first connected vehicle device includes:
  • the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel, obtaining extended configuration information included in the first system information, and the extended configuration information is used to indicate the second system information Resource location of system information;
  • the second system information includes resource pool information, where the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the receiving a physical broadcast channel sent by the first connected vehicle device includes:
  • the first system information further includes at least one of network coverage information, system frame number, system frame indication, demodulation reference signal position information, and synchronization broadcast block time indication information.
  • a method for transmitting system information between connected devices in a car includes:
  • the generating the first system information including the extended indication includes:
  • the second system information exists outside the physical broadcast channel, generating the first system information including the extended indication and extended configuration information, where the extended configuration information is used to indicate the second system information Resource location.
  • the method further includes:
  • a device for transmitting system information between connected devices in a car includes:
  • a channel receiving module configured to receive a physical broadcast channel sent by a first connected vehicle device, where the physical broadcast channel carries first system information, the first system information includes an extended indication, and the extended indication is used to indicate the physical Whether there is second system information outside the broadcast channel;
  • An extraction module configured to extract the extended instruction
  • An information receiving module is configured to receive the second system information sent by the first connected vehicle device when the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel.
  • the information receiving module is specifically configured to:
  • the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel, obtaining extended configuration information included in the first system information, and the extended configuration information is used to indicate the second system information Resource location of system information;
  • the second system information includes resource pool information, where the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the channel receiving module is specifically configured to receive the physical broadcast channel sent by the first connected vehicle device through a side link.
  • the first system information further includes at least one of network coverage information, system frame number, system frame indication, demodulation reference signal position information, and synchronization broadcast block time indication information.
  • a device for transmitting system information between connected devices in a car includes:
  • a first generating module configured to generate an extended instruction, where the extended instruction is used to indicate whether second system information exists outside a physical broadcast channel;
  • a second generating module configured to generate first system information including the extended instruction
  • a channel sending module configured to send a physical broadcast channel carrying the first system information, so that the second connected vehicle device that received the physical broadcast channel has an extension instruction for indicating that When the second system information is described, the second system information is received.
  • the second generating module is specifically configured to generate the first system information including the extended indication and extended configuration information when the second system information exists outside the physical broadcast channel, and
  • the extended configuration information is used to indicate a resource location of the second system information.
  • the device further includes:
  • An information sending module is configured to send the second system information according to a resource location of the second system information.
  • a system information transmission system between connected vehicle devices including: a first connected vehicle device and a second connected vehicle device;
  • the first IoV device includes a system information transmission device between the IoV devices shown in the fifth aspect or any optional manner of the fifth aspect;
  • the second IoV device includes a system information transmission device between the IoV devices shown in the fourth aspect or any optional manner of the fourth aspect.
  • a device for transmitting system information between connected devices in a vehicle includes:
  • a memory for storing executable instructions of the processor
  • the processor is configured to:
  • the physical broadcast channel carries first system information
  • the first system information includes an extension indication
  • the extension indication is used to indicate whether there is a physical broadcast channel outside the physical broadcast channel Second system information
  • a device for transmitting system information between connected devices in a car includes:
  • a memory for storing executable instructions of the processor
  • the processor is configured to:
  • a computer-readable storage medium includes executable instructions, and a processor in a second connected vehicle device calls the executable instructions to implement The method for transmitting system information between the connected vehicle devices in the second aspect or any optional solution of the second aspect.
  • a computer-readable storage medium includes executable instructions, and a processor in a first connected vehicle device calls the executable instructions to implement The method for transmitting system information between the connected vehicle devices in the third aspect or any optional solution of the third aspect.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extended instruction.
  • the second connected vehicle device receives the extended instruction only when the extended instruction indicates that the second system information exists outside the physical broadcast channel.
  • the second system information that is, only when the system information other than the basic system information needs to be transmitted, additional system information will be transmitted between the two connected vehicle devices, thereby greatly simplifying the system information structure and saving
  • the time-frequency resources of system information transmission are improved, and the system information transmission efficiency is improved.
  • Fig. 1 is a schematic diagram showing an implementation environment involved in a method for transmitting system information between connected devices in a car according to some exemplary embodiments;
  • Fig. 2 is a flow chart showing a method for transmitting system information between connected devices in a car according to an exemplary embodiment
  • Fig. 3 is a flow chart showing a method for transmitting system information between connected devices in a car according to an exemplary embodiment
  • Fig. 4 is a flow chart showing a method for transmitting system information between connected devices in a car according to an exemplary embodiment
  • Fig. 5 is a flow chart showing a method for transmitting system information between connected devices in a car according to an exemplary embodiment
  • FIG. 6 is a schematic diagram of a first system information structure according to the embodiment shown in FIG. 5;
  • Fig. 7 is a block diagram of a device for transmitting system information between connected devices in a car according to an exemplary embodiment
  • Fig. 8 is a block diagram of a device for transmitting system information between connected devices in a car according to an exemplary embodiment
  • Fig. 9 is a schematic structural diagram of a connected vehicle device according to an exemplary embodiment.
  • Vehicle-to-vehicle communication is also called V2x (vehicle totoeverything, vehicle and other equipment) communication, which includes V2V (vehicle totovehicle) communication technology, V2I (vehicle totoinfrastructure, vehicle to roadside equipment) communication technology and V2P (vehicle vehicle to person) communication technology.
  • V2x vehicle totoeverything, vehicle and other equipment
  • V2V vehicle totovehicle communication technology
  • V2I vehicle totoinfrastructure, vehicle to roadside equipment
  • V2P vehicle vehicle to person
  • the use of existing cellular communication technology to support IoV communication can effectively utilize the existing base station deployment, reduce equipment overhead, and be more conducive to providing services with QoS (Quality of Service) guarantee to meet the needs of IoV services. Therefore, the Rel-14 / 15 of LTE (Long Term Evolution, Long Term Evolution) technology provides cellular network support for V2x communication of vehicle networking, namely C-V2x (cellular based V2x).
  • LTE Long Term Evolution, Long Term Evolution
  • in-vehicle equipment and other equipment can be relayed through the base station and the core network, that is, the communication link between the terminal equipment and the base station in the original cellular network is used for communication (uplink / downlink communication)
  • the vehicle-mounted device and other devices may also communicate directly through a direct link between the devices, for example, communicate through a side link.
  • sidelink communication has the characteristics of short delay and low overhead, which is very suitable for direct communication between vehicle-mounted devices and other peripheral devices in close proximity.
  • V2x sidelink communication in LTE can support some basic security V2x applications, such as exchange of CAM (Cooperative Awareness Messages, Cooperative Awareness Messages) or DENM (Decentralized Environmental Notification Notification, Decentralized Environment Notification Message) and other BSM (Basic Safety Message Basic security information), voice broadcast communications, etc.
  • CAM Cooperative Awareness Messages, Cooperative Awareness Messages
  • DENM Decentralized Environmental Notification Notification, Decentralized Environment Notification Message
  • BSM Basic Security Information
  • voice broadcast communications etc.
  • 5G NR New Radio
  • the 3GPP working group has established a number of new business requirements for V2x communication, including vehicle management (Platooning), extended sensors (Advanced Sensors), advanced driving (Advanced driving), and remote driving (Remote driving).
  • vehicle management Platinum
  • Advanced Sensors extended sensors
  • Advanced driving Advanced driving
  • Remote driving Remote driving
  • NR V2x sidelink needs to provide higher communication rates, shorter communication delays, and more reliable communication quality.
  • V2x devices communicate with each other through sidelinks using vehicle-mounted GNSS (Global Navigation Satellite System), such as GPS or Beidou, or the synchronization signal broadcast by the base station as the synchronization reference signal for the device to ensure transmission. Between the receiver and the receiver.
  • GNSS Global Navigation Satellite System
  • V2x devices need to be able to pass through. Sidelink communicates reliably.
  • LTE V2x synchronization via a Sidelink direct link is supported, that is, a V2x device can complete synchronization between V2x devices by receiving synchronization signals broadcast by other V2x devices.
  • V2x system message broadcast is performed simultaneously through a PSBCH (Physical Sidelink Broadcast Channel) and a synchronization signal.
  • PSBCH Physical Sidelink Broadcast Channel
  • the broadcast content contains some synchronization and system configuration related information.
  • V2X's Sidelink is mainly for opportunistic localized communication between devices, it is only necessary to ensure that devices within the communication range have the same synchronization and frame structure understanding through broadcasting, so its system Compared with 5G, NR has less broadcast information. Therefore, if the 5G NR system information transmission method is directly used in NR V2X, it will cause system information redundancy, cause waste of NR V2X communication resources, and affect the communication efficiency of NR V2X.
  • Fig. 1 is a schematic diagram showing an implementation environment involved in a method for transmitting system information between connected vehicle devices according to some exemplary embodiments. As shown in Fig. 1, the implementation environment may include: several connected vehicle devices 110.
  • the connected vehicle device 110 is a wireless communication device supporting V2x technology.
  • the connected vehicle device 110 may support cellular mobile communication technology, for example, it may support the 4th generation mobile communication technology (4G) technology or 5G technology.
  • the IoV device 110 may also support the next-generation mobile communication technology of 5G technology.
  • the IoV device 110 may be a vehicle-mounted communication device, for example, it may be a driving computer with a wireless communication function, or a wireless communication device with an external driving computer.
  • the IoV device 110 may also be a roadside device, for example, it may be a streetlight, a signal light or other roadside device having a wireless communication function.
  • the connected vehicle device 110 may also be a user terminal device, such as a mobile phone (also called a “cellular” phone) and a computer with a mobile terminal.
  • a mobile phone also called a “cellular” phone
  • it may be portable, compact, handheld, built-in computer, or on-board Mobile device.
  • the connected vehicle device 110 may be a mobile terminal such as a smart phone, a tablet computer, an e-book reader, or may be a smart wearable device such as smart glasses, a smart watch, or a smart bracelet.
  • Fig. 2 is a flow chart showing a method for transmitting system information between connected devices in a vehicle according to an exemplary embodiment. As shown in Fig. 2, the method for transmitting system information between connected devices in a vehicle is applied to Fig. 1 In an implementation environment, the method may include the following steps.
  • the first connected vehicle device sends a physical broadcast channel, and the physical broadcast channel carries first system information, where the first system information includes an extended indication, and the extended indication is used to indicate whether a physical broadcast channel exists outside the physical broadcast channel.
  • Second system information the second connected vehicle device receives the physical broadcast channel.
  • step 202 when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the second connected vehicle device receives the second system information sent by the first connected vehicle device.
  • the system information is transmitted in a hierarchical manner, that is, the sending end first sends a PBCH (Physical Broadcast Channel).
  • the PBCH contains a MIB (master information block) and subsequent hierarchical transmission.
  • SIB System Information Block, System Information Block
  • RMSI Remaining minimum system information
  • OSI Open System Interconnection
  • the SSB Synchronous Signal / PBCH Block
  • OFDM Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division
  • the physical broadcast channel only includes basic system information (that is, the first system information described above), and the transmitting end (that is, the above-mentioned first vehicle-connected device) does not System information other than basic system information will be sent, and whether the system information other than the first system information (that is, the above-mentioned second system information) will be indicated by an extended indication in the first system information.
  • the connected vehicle device only receives the second system information when the received extended instruction is used to indicate the existence of the second system information.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • Fig. 3 is a flow chart showing a method for transmitting system information between a connected vehicle device according to an exemplary embodiment. The method may be executed by a second connected vehicle device in the embodiment shown in Fig. 2. The method may Include the following steps.
  • a physical broadcast channel sent by a first connected vehicle device is received, the physical broadcast channel carries first system information, and the first system information includes an extended indication, the extended indication is used to indicate whether the physical broadcast channel is outside the physical broadcast channel. There is second system information.
  • step 302 the extended instruction is extracted.
  • step 303 when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the second system information sent by the first connected vehicle device is received.
  • receiving the second system information sent by the first connected vehicle device includes:
  • the extended instruction When the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel, obtaining extended configuration information included in the first system information, where the extended configuration information is used to indicate a resource location of the second system information;
  • the second system information includes resource pool information, and the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the receiving a physical broadcast channel sent by the first connected vehicle device includes:
  • the first system information further includes at least one of network coverage information, system frame number, system frame indication, demodulation reference signal position information, and synchronization broadcast block time indication information.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • Fig. 4 is a flow chart showing a method for transmitting system information between a connected vehicle device according to an exemplary embodiment. The method may be executed by a first connected vehicle device in the embodiment shown in Fig. 2. The method may Include the following steps.
  • step 401 an extension instruction is generated, and the extension instruction is used to indicate whether there is second system information outside the physical broadcast channel.
  • step 402 first system information including the extended instruction is generated.
  • step 403 a physical broadcast channel carrying the first system information is sent, so that the second connected vehicle device that has received the physical broadcast channel, when the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel. To receive the second system information.
  • the generating the first system information including the extended indication includes:
  • the first system information including the extended indication and extended configuration information is generated, and the extended configuration information is used to indicate a resource location of the second system information.
  • the method further includes:
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • Fig. 5 is a flowchart illustrating a method for transmitting system information between connected devices in a vehicle according to an exemplary embodiment. As shown in Fig. 5, the method for transmitting information transmitted between devices connected to a vehicle is applied in Fig. 1 In an implementation environment, the method may include the following steps.
  • step 501 the first connected vehicle device generates an extended instruction, which is used to indicate whether there is second system information outside the physical broadcast channel.
  • the first connected vehicle device can send a physical broadcast channel through a side link.
  • sidelink is a direct link from device to device.
  • the second IoV device may receive a physical broadcast channel sent by the first IoV device through a side link.
  • the system information of V2X may be transmitted in a single level and in a multi-level optional manner. That is, the system defines only one basic physical broadcast channel in sidelink, and in the sidelink, the basic physical broadcast The channel can also be called PSBCH, and the basic physical broadcast channel contains basic system information (that is, the first system information described above) required for V2X communication.
  • the first connected vehicle device Before the first connected vehicle device sends a physical broadcast channel, it first determines whether in addition to the first system information carried in the physical broadcast channel, it is necessary to send the second system information in addition to the physical broadcast channel, and determines whether the physical broadcast channel is required The second system information is sent out of the channel, and the extension instruction is generated.
  • the extended instruction may be a field that can take different values.
  • the extended instruction ranges from 0 or 1.
  • Setting the extended instruction value to 0 indicates that there is no second system information outside the physical broadcast channel; otherwise, when the second connected vehicle device determines that the second system information needs to be sent outside the physical broadcast channel, the extended instruction value is set to the value 1, indicating that the second system information exists outside the physical broadcast channel.
  • the first connected vehicle device when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the first connected vehicle device further generates extended configuration information, where the extended configuration information is used to indicate a resource location of the second system information.
  • the resource location indicated by the extended configuration information is a resource location other than the resource location occupied by the physical broadcast channel.
  • the time-frequency resource indicated by the resource location may be occupied by the physical broadcast channel in the time domain. Resources after time-frequency resources.
  • Step 502 The first connected vehicle device generates first system information including the extended instruction.
  • the first connected vehicle device when the second system information exists outside the physical broadcast channel, the first connected vehicle device generates the first system information including the extended instruction and extended configuration information, where the extended configuration information is used to indicate the second system information The resource location for system information.
  • the first connected vehicle device when it is not necessary to send the second system information outside the physical broadcast channel, the first connected vehicle device may generate the first system information including an extended indication value of 0, and the first system information may be Does not contain extended configuration information.
  • the first connected vehicle device may generate the first system information including an extended indication value of 1, and the first system information includes extended configuration information.
  • the first connected vehicle device may generate the first system information including the extended instruction and the extended configuration information.
  • the second system information needs to be sent outside the physical broadcast channel (for example, the value of the extended indication is 0), the value of the extended configuration information is an invalid value (NULL).
  • FIG. 6 illustrates a schematic diagram of a first system information structure according to an embodiment of the present application.
  • the first system information may also include network coverage information (Incoverage indicator), SFN (System Frame Number, system frame number), and SFI (System frame) Instructions, system frame instructions), physical broadcast channel demodulation reference signal position information (PBCH, DMRS position), synchronous broadcast block time indication information (SSB, Timing Index), and SSB information actually sent.
  • network coverage information Incoverage indicator
  • SFN System Frame Number, system frame number
  • SFI System frame Instructions, system frame instructions
  • PBCH physical broadcast channel demodulation reference signal position information
  • SSB synchronous broadcast block time indication information
  • Timing Index synchronous broadcast block time indication information
  • the network coverage information may be used to indicate whether the first connected vehicle device is currently within the coverage of the cellular network, and related information of the cellular network currently covered by the first connected vehicle device, such as a cell identifier.
  • the system frame number is included in the system message and broadcasted on the physical broadcast channel for paging groups and scheduling system information.
  • the system frame indication is used to indicate the frame structure of the current message.
  • the 5G NR system supports a flexible frame structure.
  • the 5G frame structure can be composed of two parts: a fixed structure and a flexible structure.
  • the fixed structure is the same as LTE, and the length of radio frames and subframes is fixed.
  • a system frame indication for indicating a frame structure of the current message may be carried in the first system information, so that the receiving end can quickly determine the frame structure of the current message.
  • the physical broadcast channel demodulation reference signal position information indicates the time-frequency position of the demodulation reference signal.
  • the synchronization broadcast block time indication information is used to indicate a time index of the synchronization broadcast block.
  • the SSB information actually sent is used to indicate which part of the system-defined SSB the sent SSB is. Because the PBCH in a 5G system supports beam (beam) transmission, and the number of beams actually transmitted may be different, it is necessary to give the information of the SSB actually transmitted in the PBCH.
  • Step 503 The first connected vehicle device sends a physical broadcast channel carrying the first system information, and the second connected vehicle device receives the physical broadcast channel.
  • the first connected vehicle device may send a physical broadcast channel carrying the first system information through a wireless signal according to a preset sending cycle, and the second connected vehicle device detects the wireless signal and receives the physical broadcast channel.
  • Step 504 The second connected vehicle device extracts an extended instruction included in the first system information in the physical broadcast channel.
  • the second connected vehicle device detects the wireless signal, synchronizes the signal according to the synchronization signal in the wireless signal, parses the first system information in the physical broadcast channel, and extracts the extended instruction in the first system information.
  • the extended instruction may be set in a designated field in the first system information. After the second connected vehicle device parses the first system information, the extended instruction is extracted from the designated field in the first system information.
  • step 505 when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the first connected vehicle device sends the second system information, and the second connected vehicle device receives the first connected vehicle device.
  • the second system information when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the first connected vehicle device sends the second system information, and the second connected vehicle device receives the first connected vehicle device.
  • the second system information when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the first connected vehicle device sends the second system information, and the second connected vehicle device receives the first connected vehicle device.
  • the second system information when the extended indication is used to indicate that the second system information exists outside the physical broadcast channel, the first connected vehicle device sends the second system information, and the second connected vehicle device receives the first connected vehicle device. The second system information.
  • the first connected vehicle device may send the second system information according to the resource location indicated by the extended configuration information. Accordingly, when it is not necessary to send the second system information outside the physical broadcast channel, the first connected vehicle device may not send the second system information.
  • the second connected vehicle device After the second connected vehicle device obtains the extended instruction, it can determine whether there is second system information according to the value of the extended instruction. If it is determined that the second system information exists (for example, the value of the extended instruction is 1), the second connected vehicle device can further Acquiring the extended configuration information in the first system information, and receiving the second system information sent by the first connected vehicle device according to the resource location indicated by the extended configuration information.
  • the second connected vehicle device After the second connected vehicle device obtains the extended instruction, it can determine whether there is second system information according to the value of the extended instruction. If it is determined that the second system information exists (for example, the value of the extended instruction is 1), the second connected vehicle device can further Acquiring the extended configuration information in the first system information, and receiving the second system information sent by the first connected vehicle device according to the resource location indicated by the extended configuration information.
  • the second connected vehicle device After the second connected vehicle device obtains the extended instruction, it is determined that the second system information does not exist according to the value of the extended instruction (for example, the extended instruction value is 0), the second connected vehicle device does not need to perform the step of receiving the second system information .
  • the value of the extended instruction for example, the extended instruction value is 0
  • the second system information includes resource pool information, and the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the first connected vehicle device may put the resource pool information into the second system information of the basic system information to improve the flexibility of the system.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • Fig. 7 is a block diagram of a device for transmitting system information between connected devices in a car according to an exemplary embodiment.
  • the device for transmitting information transmitted between devices connected to a car in a network may be implemented through hardware or a combination of software and hardware.
  • the method is implemented as all or part of the connected vehicle device in the implementation environment shown in FIG. 1 to perform the steps performed by the second connected vehicle device in the embodiment shown in FIG. 2 or FIG. 3 or FIG. 5.
  • the system information transmission device between the connected vehicle devices may include:
  • a channel receiving module 701 configured to receive a physical broadcast channel sent by a first connected vehicle device, where the physical broadcast channel carries first system information, where the first system information includes an extension instruction, and the extension instruction is used to indicate the Whether there is second system information outside the physical broadcast channel;
  • An information receiving module 703 is configured to receive the second system information sent by the first connected vehicle device when the extension instruction is used to indicate that the second system information exists outside the physical broadcast channel.
  • the information receiving module 703 is specifically configured to:
  • the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel, obtaining extended configuration information included in the first system information, and the extended configuration information is used to indicate the second system information Resource location of system information;
  • the second system information includes resource pool information, where the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the channel receiving module 701 is specifically configured to receive the physical broadcast channel sent by the first connected vehicle device through a side link Sidelink.
  • the first system information further includes at least one of network coverage information, system frame number, system frame indication, demodulation reference signal position information, and synchronization broadcast block time indication information.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • Fig. 8 is a block diagram of a device for transmitting system information between connected devices in a car according to an exemplary embodiment.
  • the device for transmitting information transmitted between devices connected to a car in a network may be implemented through hardware or a combination of software and hardware.
  • the method is implemented as all or part of the connected vehicle device in the implementation environment shown in FIG. 1 to perform the steps performed by the first connected vehicle device in the embodiment shown in FIG. 2 or FIG. 4 or FIG. 5.
  • the system information transmission device between the connected vehicle devices may include:
  • a first generating module 801, configured to generate an extension instruction, where the extension instruction is used to indicate whether second system information exists outside a physical broadcast channel;
  • a channel sending module 803 configured to send a physical broadcast channel carrying the first system information, so that the second connected vehicle device that has received the physical broadcast channel has an extension instruction used to indicate that the physical broadcast channel exists outside the physical broadcast channel When the second system information is received, the second system information is received.
  • the second generating module 802 is specifically configured to generate the first system information including the extended indication and extended configuration information when the second system information exists outside the physical broadcast channel,
  • the extended configuration information is used to indicate a resource location of the second system information.
  • the device further includes:
  • An information sending module is configured to send the second system information according to a resource location of the second system information.
  • the first system information sent by the first connected vehicle device to the second connected vehicle device includes an extension instruction, and only when the extension instruction is used to indicate that the physical broadcast channel exists,
  • the second vehicle-connected device only receives the second system information, that is, only when it is necessary to send system information other than the basic system information, additional system information is performed between the two vehicle-connected devices. Transmission, which greatly simplifies the system information structure, saves time-frequency resources for system information transmission, and improves system information transmission efficiency.
  • An exemplary embodiment of the present disclosure also provides a system information transmission system between the IoV devices.
  • the system includes a first IoV device and a second IoV device.
  • the first IoV device includes a system information transmission device between the IoV devices provided in the embodiment shown in FIG. 8 described above;
  • the second IoV device includes a device for transmitting system information between the IoV devices provided in the embodiment shown in FIG. 7.
  • the device provided by the above embodiment implements its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions may be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • An exemplary embodiment of the present disclosure provides a device for transmitting system information between connected vehicle devices, which can implement all or all of the operations performed by the second connected vehicle device in the embodiments shown in FIG. 2, FIG. 3, or FIG. 5 described above.
  • the system information transmission device between the connected vehicle devices includes: a processor and a memory for storing executable instructions of the processor;
  • the processor is configured to:
  • the physical broadcast channel carries first system information
  • the first system information includes an extension indication
  • the extension indication is used to indicate whether there is a physical broadcast channel outside the physical broadcast channel Second system information
  • receiving the second system information sent by the first connected vehicle device includes:
  • the extended instruction is used to indicate that the second system information exists outside the physical broadcast channel, obtaining extended configuration information included in the first system information, and the extended configuration information is used to indicate the second system information Resource location of system information;
  • the second system information includes resource pool information, where the resource pool information is used to indicate a time-frequency position of a communication resource used for communication with the first connected vehicle device.
  • the receiving a physical broadcast channel sent by the first connected vehicle device includes:
  • the first system information further includes at least one of network coverage information, system frame number, system frame indication, demodulation reference signal position information, and synchronization broadcast block time indication information.
  • An exemplary embodiment of the present disclosure provides a device for transmitting system information between connected vehicle devices, which can implement all or all of the operations performed by the first connected vehicle device in the embodiments shown in FIG. 2, FIG. 4, or FIG. 5 described above.
  • the system information transmission device between the connected vehicle devices includes: a processor and a memory for storing executable instructions of the processor;
  • the processor is configured to:
  • the generating the first system information including the extended indication includes:
  • the second system information exists outside the physical broadcast channel, generating the first system information including the extended indication and extended configuration information, where the extended configuration information is used to indicate the second system information Resource location.
  • the processor is further configured to:
  • the connected vehicle device includes a hardware structure and / or a software module corresponding to each function.
  • the embodiments of this disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application of the technical solution and design constraints. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present disclosure.
  • Fig. 9 is a schematic structural diagram of a connected vehicle device according to an exemplary embodiment.
  • the connected vehicle device 900 includes a communication unit 904 and a processor 902.
  • the processor 902 may also be a controller, which is shown as "controller / processor 902" in FIG. 9.
  • the communication unit 904 is configured to support communication between a connected vehicle device and other network entities (such as other connected vehicle devices).
  • the IoV device 900 may further include a memory 903, and the memory 903 is configured to store program codes and data of the IoV device 900.
  • FIG. 9 only shows a simplified design of the connected vehicle device 900.
  • the connected vehicle device 900 may include any number of processors, controllers, memories, communication units, and the like, and all the connected vehicle devices that can implement the embodiments of the present disclosure are within the protection scope of the embodiments of the present disclosure.
  • the functions described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, or any combination thereof.
  • the functions may be stored on a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium.
  • 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.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • An embodiment of the present disclosure also provides a computer storage medium for storing computer software instructions for the above-mentioned first IoV device or second IoV device, which includes system information transmission for performing the aforementioned IoV device Methods designed procedures.

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Abstract

本公开揭示了一种车联网设备之间的系统信息传输方法，属于无线通信技术领域。所述方法包括：第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。

Description

车联网设备之间的系统信息传输方法、装置及系统 技术领域
本公开涉及无线通信技术领域，特别涉及一种车联网设备之间的系统信息传输方法、装置及系统。
背景技术
车联网是一种结合导航定位、无线通信以及远程感应等技术的新的汽车技术发展方向。
在相关技术中，车联网设备之间通过广播系统信息进行设备之间的同步和信息传输。比如，一个车联网设备可以通过广播方式发送该车联网设备的同步信号和系统信息，另一车联网设备接收到该同步信号和系统信息后，通过同步信号进行信号同步，并根据系统信息与该车联网设备进行通信。
发明内容
本公开提供一种车联网设备之间的系统信息传输方法。所述技术方案如下：
根据本公开实施例的第一方面，提供了一种车联网设备之间的系统信息传输方法，所述方法包括：
第一车联网设备发送物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
第二车联网设备接收所述物理广播信道；
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，所述第二车联网设备接收所述第一车联网设备发送的所述第二系统信息。
根据本公开实施例的第二方面，提供了一种车联网设备之间的系统信息传输方法，所述方法包括：
接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理 广播信道之外是否存在第二系统信息；
提取所述扩展指示；
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息，包括：
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
可选的，所述接收第一车联网设备发送的物理广播信道，包括：
接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
可选的，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
根据本公开实施例的第三方面，提供了一种车联网设备之间的系统信息传输方法，所述方法包括：
生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
生成包含所述扩展指示的第一系统信息；
发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
可选的，所述生成包含所述扩展指示的第一系统信息，包括：
当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
可选的，所述方法还包括：
根据所述第二系统信息的资源位置发送所述第二系统信息。
根据本公开实施例的第四方面，提供了一种车联网设备之间的系统信息传输装置，所述装置包括：
信道接收模块，用于接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
提取模块，用于提取所述扩展指示；
信息接收模块，用于当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述信息接收模块，具体用于，
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
可选的，所述信道接收模块，具体用于接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
可选的，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
根据本公开实施例的第四方面，提供了一种车联网设备之间的系统信息传输装置，所述装置包括：
第一生成模块，用于生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
第二生成模块，用于生成包含所述扩展指示的第一系统信息；
信道发送模块，用于发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
可选的，所述第二生成模块，具体用于当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
可选的，所述装置还包括：
信息发送模块，用于根据所述第二系统信息的资源位置发送所述第二系统信息。
根据本公开实施例的第六方面，提供了一种车联网设备之间的系统信息传输系统，所述系统包括：第一车联网设备和第二车联网设备；
所述第一车联网设备包含如上述第五方面或者第五方面的任一可选方式所示的车联网设备之间的系统信息传输装置；
所述第二车联网设备包含如上述第四方面或者第四方面的任一可选方式所示的车联网设备之间的系统信息传输装置。
根据本公开实施例的第七方面，提供了一种车联网设备之间的系统信息传输装置，所述装置包括：
处理器；
用于存储所述处理器的可执行指令的存储器；
其中，所述处理器被配置为：
接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
提取所述扩展指示；
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
根据本公开实施例的第八方面，提供了一种车联网设备之间的系统信息传输装置，所述装置包括：
处理器；
用于存储所述处理器的可执行指令的存储器；
其中，所述处理器被配置为：
生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
生成包含所述扩展指示的第一系统信息；
发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
根据本公开实施例的第九方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中包含可执行指令，第二车联网设备中的处理器调用所述可执行指令以实现上述第二方面或者第二方面的任一可选方案所述的车联网设备之间的系统信息传输方法。
根据本公开实施例的第十方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中包含可执行指令，第一车联网设备中的处理器调用所述可执行指令以实现上述第三方面或者第三方面的任一可选方案所述的车联网设备之间的系统信息传输方法。
本公开的实施例提供的技术方案可以包括以下有益效果：
第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并于说明书一起用于解释本公开的原理。
图1是根据部分示例性实施例示出的一种车联网设备之间的系统信息传输方法所涉及的实施环境的示意图；
图2是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图；
图3是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图；
图4是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图；
图5是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图；
图6是图5所示实施例涉及的一种第一系统信息结构示意图；
图7是根据一示例性实施例示出的一种车联网设备之间的系统信息传输装置的框图；
图8是根据一示例性实施例示出的一种车联网设备之间的系统信息传输装置的框图；
图9是根据一示例性实施例示出的一种车联网设备的结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
应当理解的是，在本文中提及的“若干个”是指一个或者多个，“多个”是指两个或两个以上。“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。
车联网通信也称为V2x(vehicle to everything，车与其他设备)通信，其包括V2V(vehicle to vehicle，车对车)通信技术、V2I(vehicle to Infrastructure，车对路边设备)通信技术和V2P(vehicle to pedestrian，车对人)通信技术。通 过V2V、V2I以及V2P的通信，车联网技术可以有效提升交通安全，改善交通效率以及丰富人们的出行体验。
利用现有的蜂窝通信技术支持车联网通信，可以有效利用现有基站部署，减少设备开销，也更有利于提供具有QoS(Quality of Service，服务质量)保证的服务，满足车联网业务的需求。因此，LTE(Long Term Evolution，长期演进)技术的Rel-14/15中提供了蜂窝网络对于车联网V2x通信的支持，即C-V2x(cellular based V2x，基于蜂窝网络的V2x)。在C-V2x技术中，车载设备和其他设备之间的通信可以通过基站以及核心网进行中转，即利用原有蜂窝网络中终端设备和基站之间的通信链路进行通信(上行/下行通信)；在另一种可能的方式中，车载设备和其他设备之间也可以直接通过设备之间的直连链路进行通信，比如，通过副链路(sidelink)进行通信。与利用上行/下行通信相比，sidelink通信具有时延短，开销小等特点，非常适合用于车载设备和地理位置接近的其他周边设备直接的通信。
LTE中的V2x sidelink通信能支持一些基础的安全方面的V2x应用，如交换CAM(Cooperative Awareness Messages，协同感知消息)或DENM(Decentralized Environmental Notification Message，分散式环境通知消息)等BSM(Basic Safety Message，基础安全信息)，进行语音广播通信等。近来随着自动驾驶等技术的发展，为了支持新的V2x业务，对于V2x技术的性能又提出了新的要求。利用5G NR(New Radio，新空口)技术支持新的V2x通信服务和场景已经被3GPP计划为Rel16的一项重要内容。3GPP工作组已经设立了一些新的V2x通信需要满足的业务需求，包括车队管理(Vehicles Platooning)，感知扩展(Extended Sensors)，先进驾驶(Advanced Driving)，和远程驾驶(Remote Driving)等。总体来说，NR V2x sidelink需要提供更高的通信速率，更短的通信延时，以及更可靠的通信质量。
一般来说，V2x设备通过sidelink进行的设备间通信可以使用车载GNSS(Global Navigation Satellite System，全球导航定位系统)，比如GPS或北斗等，或者基站广播的同步信号作为设备的同步参考信号，保证发送端和接收端之间的同步。但考虑到V2X车联网应用场景的广泛性，即使当V2x设备处于蜂窝网络基站覆盖范围之外而且无法可靠的接收到GNSS信号的时候(如山区，沙漠道路)，V2x设备之间也需要能够通过Sidelink进行可靠通信。因此，在LTE V2x中支持通过Sidelink直连链路进行同步，即一个V2x设备可以通过接收其 他V2x设备广播的同步信号完成V2x设备间的同步。在LTE V2x中，通过PSBCH(Physical Sidelink Broadcast Channel，物理副链路广播信道)和同步信号同时进行V2x的系统消息广播。广播内容包含一些同步和系统配置相关的信息。
3GPP在R16开展了对NR V2X的立项研究，由于V2X的Sidelink主要为设备间的机会性的本地化通信，只需要通过广播保证通信范围内的设备具备相同的同步和帧结构理解，因此其系统广播信息相对5G NR较少。因此，若在NR V2X中直接沿用5G NR的系统信息的发送方式，会导致系统信息冗余，造成NR V2X的通信资源的浪费，且影响NR V2X的通信效率。
图1是根据部分示例性实施例示出的一种车联网设备之间的系统信息传输方法所涉及的实施环境的示意图，如图1所示，该实施环境可以包括：若干个车联网设备110。
车联网设备110是支持V2x技术的无线通信设备。比如，车联网设备110可以支持蜂窝移动通信技术，比如，可以支持第四代移动通信技术(the 4th generation mobile communication，4G)技术或者5G技术。或者，车联网设备110也可以支持5G技术的更下一代移动通信技术。
例如，车联网设备110可以是车载通信设备，比如，可以是具有无线通信功能的行车电脑，或者是外接行车电脑的无线通信设备。
或者，车联网设备110也可以是路边设备，比如，可以是具有无线通信功能的路灯、信号灯或者其它路边设备。
或者，车联网设备110也可以是用户终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。例如，站(Station，STA)、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点、远程终端(remote terminal)、接入终端(access terminal)、用户装置(user terminal)、用户代理(user agent)、用户设备(user device)、或用户终端(user equipment，UE)。具体比如，车联网设备110可以是智能手机、平板电脑、电子书阅读器等移动终端，或者，可以是智能眼镜、智能手表或者智能手环等智能可穿戴设备。
图2是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图，如图2所示，该车联网设备之间的系统信息传输方法应用于图1所示的实施环境中，该方法可以包括以下步骤。
在步骤201中，第一车联网设备发送物理广播信道，该物理广播信道中携带第一系统信息，该第一系统信息包含扩展指示，该扩展指示用于指示该物理广播信道之外是否存在第二系统信息；第二车联网设备接收该物理广播信道。
在步骤202中，当该扩展指示用于指示该物理广播信道之外存在该第二系统信息时，该第二车联网设备接收该第一车联网设备发送的该第二系统信息。
在5G新空口系统中，系统信息采用分级的方式进行发送，即发送端首先发送PBCH(Physical Broadcast Channel，物理广播信道)，该PBCH中包含MIB(master information block，主信息块)，后续分级发送包含SIB(System Information Block，系统信息块)1以及RMSI(Remaining minimum system information，剩余最小系统信息)，以及包含其它SIB以及OSI(Open System Interconnection，开放系统互联)信息，其中，PBCH中包含有解RMSI的必要信息，RMSI和OSI中分别含有接入信息以及其他必要的系统信息。因此，5G新空口系统中的SSB(Synchronous signal/PBCH block，同步广播块)所占用的时频资源较多，通常需要占用4个或者4个以上的OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用)符号，并且在时频域上所需的带宽也更高。
而本申请实施例提供的方案，在车联网通信(V2x)中，物理广播信道中仅包含基本的系统信息(即上述第一系统信息)，发送端(即上述第一车联网设备)并不一定会发送除了基本的系统信息之外的其它系统信息，并且通过第一系统信息中的扩展指示来指示是否发送第一系统信息之外的其它系统信息(即上述第二系统信息)，第二车联网设备在接收到的扩展指示用于指示存在第二系统信息时，才接收该第二系统信息。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
图3是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图，该方法可以由图2所示实施例中的第二车联网设备来执行，该方法可以包括以下步骤。
在步骤301中，接收第一车联网设备发送的物理广播信道，该物理广播信道中携带第一系统信息，该第一系统信息包含扩展指示，该扩展指示用于指示该物理广播信道之外是否存在第二系统信息。
在步骤302中，提取该扩展指示。
在步骤303中，当该扩展指示用于指示该物理广播信道之外存在该第二系统信息时，接收该第一车联网设备发送的该第二系统信息。
可选的，该当该扩展指示用于指示该物理广播信道之外存在该第二系统信息时，接收该第一车联网设备发送的该第二系统信息，包括：
当该扩展指示用于指示该物理广播信道之外存在该第二系统信息时，获取该第一系统信息中包含的扩展配置信息，该扩展配置信息用于指示该第二系统信息的资源位置；
根据该第二系统信息的资源位置，接收该第一车联网设备发送的该第二系统信息。
可选的，该第二系统信息包括资源池信息，该资源池信息用于指示与该第一车联网设备进行通信所使用的通信资源的时频位置。
可选的，该接收第一车联网设备发送的物理广播信道，包括：
接收该第一车联网设备通过副链路Sidelink发送的该物理广播信道。
可选的，该第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
图4是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方 法的流程图，该方法可以由图2所示实施例中的第一车联网设备来执行，该方法可以包括以下步骤。
在步骤401中，生成扩展指示，该扩展指示用于指示物理广播信道之外是否存在第二系统信息。
在步骤402中，生成包含该扩展指示的第一系统信息。
在步骤403中，发送携带该第一系统信息的物理广播信道，以便接收到该物理广播信道的第二车联网设备在该扩展指示用于指示该物理广播信道之外存在该第二系统信息时，接收该第二系统信息。
可选的，该生成包含该扩展指示的第一系统信息，包括：
当该物理广播信道之外存在该第二系统信息时，生成包含该扩展指示以及扩展配置信息的该第一系统信息，该扩展配置信息用于指示该第二系统信息的资源位置。
可选的，该方法还包括：
根据该第二系统信息的资源位置发送该第二系统信息。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
图5是根据一示例性实施例示出的一种车联网设备之间的系统信息传输方法的流程图，如图5所示，该车联网设备之间的系统信息传输方法应用于图1所示的实施环境中，该方法可以包括以下步骤。
在步骤501中，第一车联网设备生成扩展指示，该扩展指示用于指示物理广播信道之外是否存在第二系统信息。
第一车联网设备可以通过副链路(Sidelink)发送物理广播信道。其中，sidelink是一种设备到设备之间的直连链路。相应地，第二车联网设备可以接收第一车联网设备通过副链路(Sidelink)发送的物理广播信道。
在本申请实施例中，V2X的系统信息可以采用单级为主，多级可选的方式进行发送，即系统在sidelink中只定义一个基本的物理广播信道，在sidelink 中，该基本的物理广播信道也可以称为PSBCH，该基本的物理广播信道包含V2X通信所需的基本的系统信息(即上述第一系统信息)。
第一车联网设备在发送物理广播信道之前，首先确定除了物理广播信道中携带的第一系统信息之外，是否还需要在物理广播信道之外发送第二系统信息，并确定是否需要在物理广播信道之外发送第二系统信息，生成上述扩展指示。
其中，该扩展指示可以是一个可以取不同值的字段，比如，扩展指示的取值范围为0或1，当第一车联网设备确定不需要在物理广播信道之外发送第二系统信息时，设置扩展指示的值为0，表示物理广播信道之外不存在第二系统信息；反之，当第二车联网设备确定需要在物理广播信道之外发送第二系统信息时，设置扩展指示的值为1，表示物理广播信道之外存在第二系统信息。
可选的，当扩展指示用于指示物理广播信道之外存在第二系统信息时，第一车联网设备还生成扩展配置信息，该扩展配置信息用于指示该第二系统信息的资源位置。
其中，上述扩展配置信息所指示的资源位置是物理广播信道所占用的资源位置之外的其它资源位置，比如，上述资源位置所指示的时频资源可以是时域上处于物理广播信道所占用的时频资源之后的资源。
步骤502，第一车联网设备生成包含该扩展指示的第一系统信息。
可选的，当该物理广播信道之外存在该第二系统信息时，第一车联网设备生成包含该扩展指示以及扩展配置信息的该第一系统信息，该扩展配置信息用于指示该第二系统信息的资源位置。
在本申请实施例中，当不需要在物理广播信道之外发送第二系统信息时，第一车联网设备可以生成包含扩展指示的值为0的第一系统信息，该第一系统信息中可以不包含扩展配置信息。
当需要在物理广播信道之外发送第二系统信息时，第一车联网设备可以生成包含扩展指示的值为1的第一系统信息，且该第一系统信息中包含扩展配置信息。
或者，在另一种可能的实现方式中，无论是否需要在物理广播信道之外发送第二系统信息，第一车联网设备都可以生成包含扩展指示以及扩展配置信息的第一系统信息，当不需要在物理广播信道之外发送第二系统信息(比如扩展指示的值为0)时，扩展配置信息的值为无效值(NULL)。
可选的，请参考图6，其示出了本申请实施例涉及的一种第一系统信息结构示意图。如图6所示，除了上述扩展指示以及扩展配置信息之外，该第一系统信息中还可以包含网络覆盖信息(In coverage indicator)、SFN(System Frame Number，系统帧号)、SFI(System Frame Instructions，系统帧指示)、物理广播信道解调参考信号位置信息(PBCH DMRS position)、同步广播块时间指示信息(SSB Timing Index)以及实际发送的SSB信息中的至少一种。
其中，网络覆盖信息可以用于指示第一车联网设备当前是否处于蜂窝网络的覆盖范围内，以及当前覆盖第一车联网设备的蜂窝网络的相关信息，比如小区标识等。
系统帧号是被包含在系统消息中在物理广播信道上对进行广播，用来寻呼群组和进行系统信息的调度。
系统帧指示用于指示当前消息的帧结构。5G NR系统支持灵活的帧结构，比如5G帧结构可以由固定结构和灵活结构两部分组成，其中固定结构与LTE相同，无线帧和子帧的长度固定，利于LTE和NR共同部署模式下时隙与帧结构同步，简化小区搜索和频率测量，而灵活结构部分的时隙和字符长度可根据子载波间隔灵活定义，也就是说，NR系统中的帧结构并不是固定不变的，在本申请实施例中，可以在第一系统信息中携带用于指示当前消息的帧结构的系统帧指示，以便接收端快速确定当前消息的帧结构。
物理广播信道解调参考信号位置信息指示解调参考信号的时频位置。
同步广播块时间指示信息用于指示同步广播块的时间索引。
实际发送的SSB信息用于指示发送的SSB是系统定义的SSB中的哪一部分。由于5G系统中的PBCH支持波束(beam)发送，而实际发送的beam数可能不同，因此需要在PBCH里给出实际发送的SSB的信息。
步骤503，第一车联网设备发送携带该第一系统信息的物理广播信道，第二车联网设备接收该物理广播信道。
在本申请实施例中，第一车联网设备可以按照预设的发送周期，通过无线信号发送携带该第一系统信息的物理广播信道，第二车联网设备检测无线信号并接收该物理广播信道。
步骤504，第二车联网设备提取该物理广播信道中的第一系统信息包含的扩展指示。
第二车联网设备检测到无线信号，根据无线信号中的同步信号进行信号同 步，并解析该物理广播信道中的第一系统信息，并提取该第一系统信息中的扩展指示。
其中，上述扩展指示可以设置在第一系统信息中的指定字段中，第二车联网设备解析出第一系统信息后，从第一系统信息的指定字段中提取该扩展指示。
在步骤505中，当该扩展指示用于指示该物理广播信道之外存在第二系统信息时，第一车联网设备发送该第二系统信息，第二车联网设备接收该第一车联网设备发送的该第二系统信息。
当需要在物理广播信道之外发送第二系统信息时，第一车联网设备可以根据扩展配置信息所指示的资源位置发送该第二系统信息。相应的，当不需要在物理广播信道之外发送第二系统信息时，第一车联网设备可以不发送第二系统信息。
第二车联网设备获取到扩展指示后，可以根据扩展指示的值确定是否存在第二系统信息，如果判断存在第二系统信息(比如扩展指示的值为1)，则第二车联网设备可以进一步获取第一系统信息中的扩展配置信息，并根据扩展配置信息所指示的资源位置接收该第一车联网设备发送的第二系统信息。
当第二车联网设备获取到扩展指示后，根据扩展指示的值确定不存在第二系统信息(比如扩展指示的值为0)，则第二车联网设备不需要执行接收第二系统信息的步骤。
可选的，该第二系统信息包括资源池信息(Resource pool information)，该资源池信息用于指示与该第一车联网设备进行通信所使用的通信资源的时频位置。
在本申请实施例中，第一车联网设备可以将资源池信息放到基本的系统信息的第二系统信息中，以提高系统的灵活性。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
下述为本公开装置实施例，可以用于执行本公开方法实施例。对于本公开装置实施例中未披露的细节，请参照本公开方法实施例。
图7是根据一示例性实施例示出的一种车联网设备之间的系统信息传输装置的框图，如图7所示，该车联网设备之间的系统信息传输装置可以通过硬件或者软硬结合的方式实现为图1所示实施环境中的车联网设备的全部或者部分，以执行图2或图3或图5任一所示实施例中由第二车联网设备执行的步骤。该车联网设备之间的系统信息传输装置可以包括：
信道接收模块701，用于接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
提取模块702，用于提取所述扩展指示；
信息接收模块703，用于当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述信息接收模块703，具体用于，
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
可选的，所述信道接收模块701，具体用于接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
可选的，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信 息传输的时频资源，提高系统信息传输效率。
图8是根据一示例性实施例示出的一种车联网设备之间的系统信息传输装置的框图，如图8所示，该车联网设备之间的系统信息传输装置可以通过硬件或者软硬结合的方式实现为图1所示实施环境中的车联网设备的全部或者部分，以执行图2或图4或图5任一所示实施例中由第一车联网设备执行的步骤。该车联网设备之间的系统信息传输装置可以包括：
第一生成模块801，用于生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
第二生成模块802，用于生成包含所述扩展指示的第一系统信息；
信道发送模块803，用于发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
可选的，所述第二生成模块802，具体用于当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
可选的，所述装置还包括：
信息发送模块，用于根据所述第二系统信息的资源位置发送所述第二系统信息。
综上所述，本公开实施例所示的方案，第一车联网设备向第二车联网设备发送的第一系统信息中包含扩展指示，只有当扩展指示用于指示物理广播信道之外存在该第二系统信息时，第二车联网设备才接收该第二系统信息，即只有在需要发送基本的系统信息之外的其它系统信息时，两个车联网设备之间才会进行额外的系统信息的传输，从而极大的简化了系统信息结构，节省了系统信息传输的时频资源，提高系统信息传输效率。
本公开一示例性实施例还提供了一种车联网设备之间的系统信息传输系统，所述系统包括：第一车联网设备和第二车联网设备。
所述第一车联网设备包含如上述图8所示实施例提供的车联网设备之间的系统信息传输装置；
所述第二车联网设备包含如上述图7所示实施例提供的车联网设备之间的 系统信息传输装置。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
本公开一示例性实施例提供了一种车联网设备之间的系统信息传输装置，能够实现本公开上述图2、图3或图5所示实施例中由第二车联网设备执行的全部或者部分步骤，该车联网设备之间的系统信息传输装置包括：处理器、用于存储处理器可执行指令的存储器；
其中，处理器被配置为：
接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
提取所述扩展指示；
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息，包括：
当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
可选的，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
可选的，所述接收第一车联网设备发送的物理广播信道，包括：
接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
可选的，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
本公开一示例性实施例提供了一种车联网设备之间的系统信息传输装置，能够实现本公开上述图2、图4或图5所示实施例中由第一车联网设备执行的全部或者部分步骤，该车联网设备之间的系统信息传输装置包括：处理器、用于存储处理器可执行指令的存储器；
其中，处理器被配置为：
生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
生成包含所述扩展指示的第一系统信息；
发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
可选的，所述生成包含所述扩展指示的第一系统信息，包括：
当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
可选的，所述处理器还被配置为：
根据所述第二系统信息的资源位置发送所述第二系统信息。
上述主要以车联网设备为例，对本公开实施例提供的方案进行了介绍。可以理解的是，车联网设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本公开中所公开的实施例描述的各示例的模块及算法步骤，本公开实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本公开实施例的技术方案的范围。
图9是根据一示例性实施例示出的一种车联网设备的结构示意图。
车联网设备900包括通信单元904和处理器902。其中，处理器902也可 以为控制器，图9中表示为“控制器/处理器902”。通信单元904用于支持车联网设备与其它网络实体(例如其它车联网设备诶等)进行通信。
进一步的，车联网设备900还可以包括存储器903，存储器903用于存储车联网设备900的程序代码和数据。
可以理解的是，图9仅仅示出了车联网设备900的简化设计。在实际应用中，车联网设备900可以包含任意数量的处理器，控制器，存储器，通信单元等，而所有可以实现本公开实施例的车联网设备都在本公开实施例的保护范围之内。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本公开实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者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。存储介质可以是通用或专用计算机能够存取的任何可用介质。
本公开实施例还提供了一种计算机存储介质，用于储存为上述第一车联网设备或者第二车联网设备所用的计算机软件指令，其包含用于执行上述车联网设备之间的系统信息传输方法所设计的程序。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (22)

  1. 一种车联网设备之间的系统信息传输方法，其特征在于，所述方法包括：
    第一车联网设备发送物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
    第二车联网设备接收所述物理广播信道；
    当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，所述第二车联网设备接收所述第一车联网设备发送的所述第二系统信息。
  2. 一种车联网设备之间的系统信息传输方法，其特征在于，所述方法包括：
    接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
    提取所述扩展指示；
    当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
  3. 根据权利要求2所述的方法，其特征在于，所述当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息，包括：
    当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
    根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
  4. 根据权利要求2所述的方法，其特征在于，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
  5. 根据权利要求2所述的方法，其特征在于，所述接收第一车联网设备发送的物理广播信道，包括：
    接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
  6. 根据权利要求2所述的方法，其特征在于，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
  7. 一种车联网设备之间的系统信息传输方法，其特征在于，所述方法包括：
    生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
    生成包含所述扩展指示的第一系统信息；
    发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
  8. 根据权利要求7所述的方法，其特征在于，所述生成包含所述扩展指示的第一系统信息，包括：
    当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    根据所述第二系统信息的资源位置发送所述第二系统信息。
  10. 一种车联网设备之间的系统信息传输装置，其特征在于，所述装置包括：
    信道接收模块，用于接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
    提取模块，用于提取所述扩展指示；
    信息接收模块，用于当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
  11. 根据权利要求10所述的装置，其特征在于，所述信息接收模块，具体用于，
    当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，获取所述第一系统信息中包含的扩展配置信息，所述扩展配置信息用于指示所述第二系统信息的资源位置；
    根据所述第二系统信息的资源位置，接收所述第一车联网设备发送的所述第二系统信息。
  12. 根据权利要求10所述的装置，其特征在于，所述第二系统信息包括资源池信息，所述资源池信息用于指示与所述第一车联网设备进行通信所使用的通信资源的时频位置。
  13. 根据权利要求10所述的装置，其特征在于，所述信道接收模块，具体用于接收所述第一车联网设备通过副链路Sidelink发送的所述物理广播信道。
  14. 根据权利要求10所述的装置，其特征在于，所述第一系统信息中还包含网络覆盖信息、系统帧号、系统帧指示、解调参考信号位置信息以及同步广播块时间指示信息中的至少一种。
  15. 一种车联网设备之间的系统信息传输装置，其特征在于，所述装置包括：
    第一生成模块，用于生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
    第二生成模块，用于生成包含所述扩展指示的第一系统信息；
    信道发送模块，用于发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
  16. 根据权利要求15所述的装置，其特征在于，
    所述第二生成模块，具体用于当所述物理广播信道之外存在所述第二系统信息时，生成包含所述扩展指示以及扩展配置信息的所述第一系统信息，所述扩展配置信息用于指示所述第二系统信息的资源位置。
  17. 根据权利要求16所述的装置，其特征在于，所述装置还包括：
    信息发送模块，用于根据所述第二系统信息的资源位置发送所述第二系统信息。
  18. 一种车联网设备之间的系统信息传输系统，其特征在于，所述系统包括：第一车联网设备和第二车联网设备；
    所述第一车联网设备包含如权利要求15至17任一所述的车联网设备之间的系统信息传输装置；
    所述第二车联网设备包含如权利要求10至14任一所述的车联网设备之间的系统信息传输装置。
  19. 一种车联网设备之间的系统信息传输装置，其特征在于，所述装置包括：
    处理器；
    用于存储所述处理器的可执行指令的存储器；
    其中，所述处理器被配置为：
    接收第一车联网设备发送的物理广播信道，所述物理广播信道中携带第一系统信息，所述第一系统信息包含扩展指示，所述扩展指示用于指示所述物理广播信道之外是否存在第二系统信息；
    提取所述扩展指示；
    当所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第一车联网设备发送的所述第二系统信息。
  20. 一种车联网设备之间的系统信息传输装置，其特征在于，所述装置包括：
    处理器；
    用于存储所述处理器的可执行指令的存储器；
    其中，所述处理器被配置为：
    生成扩展指示，所述扩展指示用于指示物理广播信道之外是否存在第二系统信息；
    生成包含所述扩展指示的第一系统信息；
    发送携带所述第一系统信息的物理广播信道，以便接收到所述物理广播信道的第二车联网设备在所述扩展指示用于指示所述物理广播信道之外存在所述第二系统信息时，接收所述第二系统信息。
  21. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中包含可执行指令，第二车联网设备中的处理器调用所述可执行指令以实现上述权利要求2至6任一所述的车联网设备之间的系统信息传输方法。
  22. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中包含可执行指令，第一车联网设备中的处理器调用所述可执行指令以实现上述权利要求7至9任一所述的车联网设备之间的系统信息传输方法。
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