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WO2017071137A1 - Information transmission method and road side unit - Google Patents

Information transmission method and road side unit Download PDF

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Publication number
WO2017071137A1
WO2017071137A1 PCT/CN2016/072870 CN2016072870W WO2017071137A1 WO 2017071137 A1 WO2017071137 A1 WO 2017071137A1 CN 2016072870 W CN2016072870 W CN 2016072870W WO 2017071137 A1 WO2017071137 A1 WO 2017071137A1
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WO
WIPO (PCT)
Prior art keywords
rsu
terminal
mapping information
information
discovery
Prior art date
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Ceased
Application number
PCT/CN2016/072870
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French (fr)
Chinese (zh)
Inventor
雷艺学
郑倩
张晨璐
张云飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Publication of WO2017071137A1 publication Critical patent/WO2017071137A1/en
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Ceased legal-status Critical Current

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • 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
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for information transmission and a roadside unit.
  • V2X Vehicle and X
  • V2X Vehicle and X
  • V2V Vehicle to Vehicle
  • V2I Vehicle and Infrastructure
  • V2N Vehicle and Nomadic Devices
  • V2X Voice over IP
  • V2X Voice over IP
  • DSRC Dedicated Short Range Communications
  • D2D device-to-device
  • a technical problem to be solved by embodiments of the present invention is to provide a method and apparatus for information transmission. To solve the problem of large transmission delay of V2X service.
  • a first aspect of the embodiments of the present invention provides a method for information transmission, including:
  • the roadside unit RSU receives the D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier cached by the terminal and the adjacent service application code, and The validity period of the mapping relationship;
  • the RSU configures part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal belonging to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.
  • the method further includes:
  • the RSU and the proximity service function entity verify the authenticity and/or timeliness of the newly added content in the mapping information.
  • the preset condition includes at least one of the following:
  • the distance from the RSU is less than or equal to a preset threshold.
  • the mapping information is transmitted through the user plane data channel, and when the RSU configures part or all of the mapping information for the terminal belonging to the RSU, according to the road segment and/or the location range information where the terminal is located. And configuring, for the terminal, mapping information that matches the section and/or location range information of the location.
  • the method further includes:
  • the RSU joins the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same;
  • the RSU configures part or all of the mapping information for the terminal that belongs to the RSU, including:
  • the RSU to which the terminal that is in the coverage of the RSU belongs is located in the same RSU group as the RSU, the RSU does not need to broadcast the cached mapping information to the terminal;
  • the RSU performs mapping information matching with the RSU to which the terminal belongs before the handover. If the matching is successful, the RSU indicates that the terminal continues to use the original mapping information, and if the matching is unsuccessful, the RSU broadcasts its cached mapping information to the terminal.
  • a second aspect of the embodiments of the present invention provides a roadside unit, including:
  • a receiving module configured to receive D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier of the terminal cache and the adjacent service application code, and an expiration date of the mapping relationship;
  • a forwarding module configured to forward the mapping information to other roadside units that meet preset conditions
  • a configuration module configured to configure part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal that belongs to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.
  • the roadside unit further includes:
  • a verification module configured to verify authenticity and/or timeliness of the newly added content in the mapping information with the proximity service function entity.
  • the preset condition includes at least one of the following:
  • the distance from the RSU is less than or equal to a preset threshold.
  • the mapping information is transmitted through the user plane data channel, and the configuration module is specifically configured to configure, according to the road segment and/or the location range information of the terminal, the terminal segment and/or the location range information. Matching mapping information.
  • the roadside unit further includes:
  • the module is added to join the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same;
  • the configuration module is specifically configured to:
  • the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, it is not necessary to broadcast the cached mapping information to the terminal;
  • the configuration module performs mapping information with the RSU to which the terminal belongs before the handover. If the matching is successful, the configuration module instructs the terminal to continue to use the original mapping information. If the matching is unsuccessful, the configuration module broadcasts the cached mapping information to the terminal.
  • the D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals.
  • Maintenance, the entire process does not need to interact with the network side of the core network, thereby reducing the delay of the D2D discovery technology for the V2X service, especially for the transmission of the V2X emergency service, fully satisfying the transmission delay requirement of the V2X service, and providing the user with Higher speed and more stable Fast V2X service transmission, which improves traffic safety.
  • FIG. 1 is a schematic flow chart of a first embodiment of a method for transmitting information according to the present invention
  • FIG. 2 is a schematic flow chart of a second embodiment of a method for transmitting information according to the present invention.
  • FIG. 3 is a schematic flow chart of a third embodiment of a method for transmitting information according to the present invention.
  • Figure 4 is a schematic view showing the composition of the first embodiment of the roadside unit of the present invention.
  • Figure 5 is a schematic view showing the composition of a second embodiment of the roadside unit of the present invention.
  • Figure 6 is a schematic view showing the composition of a third embodiment of the roadside unit of the present invention.
  • D2D Device-to-Device
  • a transmission protocol using D2D discovery technology in which V2X application layer messages can be used as D2D discovery messages.
  • the payload is sent by broadcast through the Physical Layer Sidelink Discovery Channel (PSDCH); the other is based on the transmission protocol of the D2D communication technology, in which the V2X application layer message can be used as the payload.
  • the D2D communication data is transmitted on a physical layer side link control channel (PSCCH) and a physical layer side link shared channel (PSSCH).
  • PSCCH physical layer side link control channel
  • PSSCH physical layer side link shared channel
  • the embodiments of the present invention mainly consider a transmission protocol based on the D2D discovery technology for transmitting V2X services, especially V2V and/or V2I services.
  • a base station scheduling mode There are two resource allocation modes in the D2D discovery technology, namely, a base station scheduling mode and a resource pool mode, where the base station scheduling mode is funded by the base station according to the resources that the base station can actively schedule for its coverage.
  • Source scheduling in the resource pool mode, a resource pool is composed of some resources, and different terminals use resources in the resource pool through resource requests.
  • the resource pool manager attaches an occupied identifier to the used resources.
  • the resource is recycled to the resource pool and the occupied ID is removed.
  • the entity that controls the V2X service transmission on the network side in the embodiment of the present invention may be implemented based on a D2D functional entity, that is, a Proximity Based Services Function (ProSe Function). Used as an entity for vehicle network control.
  • This method is mainly suitable for V2X service transmission using D2D technology.
  • the V2X related control can be deployed independently of the D2D functional entity or integrated, but from the perspective of protocol simplification and reuse, the PC3 interface between the terminal and the ProSe Function can be reused.
  • the functional entity or device that controls the V2X service transmission can also be set independently, which is not limited in the embodiment of the present invention.
  • the Road Side Unit can be implemented by a stationary terminal or by a small base station.
  • the RSU is mainly implemented in a base station manner, and may also be implemented by using a terminal type-based micro base station (T-SC) capable of providing aggregation access for an in-vehicle terminal.
  • V2X service transmission including V2V and V2I, can be transmitted through the PC5 interface based on the D2D protocol.
  • the terminal described in the present invention may be a mobile terminal held by a user supporting the D2D protocol, or may be an in-vehicle terminal integrated in the vehicle.
  • FIG. 1 is a schematic flowchart of a first embodiment of a method for transmitting information according to the present invention.
  • the method includes the following steps:
  • the roadside unit RSU receives the D2D discovery mapping information sent by the terminal.
  • the D2D discovery mapping information includes a mapping relationship between a ProSe Application ID and a ProSe Application Code cached by the terminal and an expiration date of the mapping relationship;
  • the terminal reporting mapping information is not limited to a radio resource control (Radio Resource Control, RRC for short) or a PC5 control plane protocol between the terminal and the RSU, and may use a protocol (Internet Protocol, which is interconnected between users' networks).
  • RRC Radio Resource Control
  • IP Internet Protocol
  • the RSU forwards the mapping information to other roadside units that meet preset conditions.
  • the preset condition includes at least one of the following:
  • the distance from the RSU is less than or equal to a preset threshold.
  • the RSU may forward the mapping information through the interface between the RSUs, and the mapping information may be quickly and timely spread by means of the wired backhaul link.
  • the RSU can perform targeted diffusion and propagation of the mapping information by predicting the mobility of the terminal. For example, when a vehicle enters the entrance of a section of a highway, this mechanism can be used to have such mapping information in the RSU of the section of the highway. Or some of the RSUs that are adjacent to the current RSU have these mapping information. Or the mapping information can be forwarded by considering both conditions. Thereby improving the purpose of mapping information forwarding.
  • the RSU configures part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal that belongs to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.
  • the D2D discovery related message herein may include, but is not limited to, a message that the terminal interacts during D2D discovery, such as a D2D discovery message and a response message of the D2D discovery message.
  • mapping information may be transmitted through a user plane data channel, so that control signaling when mapping information configuration may be reduced.
  • the terminal when the RSU configures part or all of the content of the mapping information for the terminal that belongs to the RSU, the terminal may be configured with the road segment according to the road segment and/or the location range information where the terminal is located. / or mapping information that matches the location range information. For example, when the terminal enters a certain expressway, the RSU may only send the mapping information related to the segment of the highway to the terminal, or when the terminal enters a certain range of locations, the RSU may only involve the location range. The mapping information is sent to the terminal, thereby reducing the transmission amount of the mapping information, and improving the efficiency and purpose of the mapping information transmission and configuration. Of course, the RSU can also directly send all the mapping information of the cache to the terminal, which is not limited in the embodiment of the present invention.
  • the D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals.
  • Maintenance, the entire process does not need to interact with the network side of the core network, thereby reducing the delay of the D2D discovery technology for the V2X service, especially for the transmission of the V2X emergency service, fully satisfying the transmission delay requirement of the V2X service, and providing the user with Higher speed, more stable and faster V2X service transmission, thus improving traffic safety.
  • step S201 is the same as step S101, and steps S203-S204 are the same as steps S102-S103, and details are not described herein again.
  • step S201 is the same as step S101, and steps S203-S204 are the same as steps S102-S103, and details are not described herein again.
  • the RSU and the ProSe Function perform verification on authenticity and/or timeliness of the newly added content in the mapping information.
  • the main purpose of the verification is to ensure the validity of the mapping information of the RSU cache, prevent the spoofing information, and the synchronization with the network side device.
  • the RSU and the ProSe Function can be configured with a high-speed and large-capacity wired network connection, which can realize high-speed and real-time interaction. Thereby reducing the delay caused by the verification.
  • steps S301-S304 are the same as steps S201-S204 in FIG. 2, and details are not described herein again.
  • the method further includes the following steps:
  • RSU joins an RSU group (RSU group).
  • mapping information of the RSU caches located in the same RSU packet is the same.
  • the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, the RSU does not need to broadcast the cached mapping information to the terminal.
  • the RSU to which the terminal that enters the coverage of the RSU belongs is not located in the same RSU packet, after the terminal switches to the RSU, the RSU maps with the RSU to which the terminal belongs before the handover. If the matching is successful, the RSU indicates that the terminal continues to use the original mapping information. If the matching is unsuccessful, the RSU broadcasts its cached mapping information to the terminal.
  • an RSU packet with completely synchronized mapping information may be constructed for at least two RSUs, and mapping information between RSUs within the same packet is completely synchronized, so that when the car network terminal is in one When a location change or even a handover occurs between RSUs in a packet, there is no need to update the mapping message. Similarly, the RSU does not need to broadcast mapping information to the terminal, thereby saving energy consumption and signaling overhead.
  • the terminal For an RSU that does not belong to the same RSU group, the terminal follows the vehicle while driving, and performs switching between RSUs. After the handover is completed, the base station may decide whether it is necessary to send mapping information to the terminal. For example, the process can be connected by a radio resource control protocol between the switched RSU and the terminal. Triggered by an RRC Connection Reconfiguration message.
  • mapping information matching may be performed before the transmission.
  • the new RSU indicates to the terminal that the original broadcast information can continue to be used.
  • mapping information is different or cannot be compared, the mapping information is broadcast to the terminal by the new RSU.
  • the base station may perform unified grouping or perform adjustment of the intra-group RSU.
  • the terminal includes:
  • the receiving module 100 is configured to receive the D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier and the adjacent service application code cached by the terminal, and an expiration date of the mapping relationship;
  • the forwarding module 200 is configured to forward the mapping information to other roadside units that meet preset conditions;
  • the configuration module 300 is configured to configure part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal belonging to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.
  • the preset condition includes at least one of the following:
  • the distance from the RSU is less than or equal to a preset threshold.
  • mapping information is transmitted through the user plane data channel, and the configuration module 300 is specifically configured to configure, according to the road segment and/or the location range information of the terminal, the terminal segment and/or the located road segment and/or Mapping information that matches the location range information.
  • the roadside unit according to the embodiment of the present invention further includes:
  • the verification module 400 is configured to verify the authenticity and/or timeliness of the newly added content in the mapping information with the proximity service function entity.
  • FIG. 6 it is a schematic diagram of a composition of a third embodiment of a roadside unit according to the present invention.
  • the roadside unit according to the embodiment of the present invention further includes:
  • the joining module 500 is configured to join the RSU packet and is located in the RSU cache in the same RSU packet.
  • the mapping information is the same;
  • the configuration module 300 is specifically configured to:
  • the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, it is not necessary to broadcast the cached mapping information to the terminal;
  • the configuration module 300 maps with the RSU to which the terminal belongs before the handover. If the matching is successful, the configuration module 300 instructs the terminal to continue to use the original mapping information. If the matching is unsuccessful, the configuration module 300 broadcasts the cached mapping information to the terminal.
  • the receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, and the joining module 500 may exist independently or may be integrated.
  • the receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, or the joining module 500 may
  • the form of the hardware is separately set independently of the processor of the roadside unit, and the setting form may be in the form of a microprocessor; or may be embedded in the processor of the roadside unit in hardware form, or may be stored in software in the form.
  • the processor of the roadside unit is instructed to perform operations corresponding to the above receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, and the adding module 500.
  • the configuration module 300 may be a processor of the roadside unit, and the receiving module 100, the forwarding module 200, the verification module 400, and The function of adding module 500 may be embedded in the processor, or may be set separately from the processor, or may be stored in the memory in the form of software, and the function is called by the processor.
  • the embodiment of the invention does not impose any limitation.
  • the above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer, or the like.
  • the present invention has the following advantages:
  • the D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals.
  • Maintenance the entire process does not need to interact with the network side of the core network, Therefore, the delay of the D2D discovery technology for the V2X service is reduced, especially for the transmission of the V2X emergency service, which fully satisfies the requirement of the transmission delay of the V2X service, and can provide the user with higher speed, more stable and faster V2X service transmission, thereby improving the Traffic safety.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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

Abstract

Disclosed is an information transmission method, comprising: a road side unit (RSU) receiving D2D discovery mapping information sent by a terminal, wherein the D2D discovery mapping information comprises a mapping relationship between a proximity service application identifier and a proximity service application code cached by the terminal as well as a validity period of the mapping relationship; the RSU forwarding the mapping information to other road side units that meet a pre-set condition; and the RSU configuring some or all of the contents of the mapping information for the terminal attributed to the RSU, so that the terminal attributed to the RSU transmits a D2D discovery-related message according to the configured mapping information. Further disclosed is a road side unit. By adopting the present invention, the delay of V2X service transmission can be reduced, and the transmission requirements of an emergent V2X service can be satisfied.

Description

一种信息传输的方法及路侧单元Method for information transmission and roadside unit 技术领域Technical field

本发明涉及通信技术领域，尤其涉及一种信息传输的方法及路侧单元。The present invention relates to the field of communications technologies, and in particular, to a method for information transmission and a roadside unit.

背景技术Background technique

车与外界(Vehicle to X，简称V2X)的信息交换，是未来智能交通运输系统的关键技术。它使得车与车、车与基站、车与移动设备之间能够通信。从而获得实时路况、道路信息、行人信息等一系列交通信息，从而提高驾驶安全性，减少拥堵，提高交通效率等。其可以包括车辆与车辆(Vehicle to Vehicle，简称V2V)的信息交换，车辆与基础设施(Vehicle to Infrastructure，简称V2I)的信息交换以及车辆与移动设备(Vehicle to nomadic devices，简称V2N)的信息交换。The information exchange between Vehicle and X (V2X) is the key technology of future intelligent transportation system. It enables communication between cars and cars, cars and base stations, and between cars and mobile devices. Thereby obtaining a series of traffic information such as real-time road conditions, road information, pedestrian information, etc., thereby improving driving safety, reducing congestion, and improving traffic efficiency. It may include information exchange between Vehicle to Vehicle (V2V), information exchange between Vehicle and Infrastructure (V2I), and information exchange between Vehicle and Nomadic Devices (V2N). .

许多V2X应用将改善安全性、车辆通行和能耗情况。V2X也有利于实现未来的巡航辅助公路和自动驾驶。在现有技术中，通常采用专用短程通信技术(Dedicated Short Range Communications，简称DSRC)来传输V2X业务，但是其传输指标如通信距离、时延或可靠性等无法满足V2X业务对传输指标的技术需求，业界正在研究基于设备与设备(Device-to-Device，简称D2D)发现技术来传输V2V紧急业务内容的方案。传统D2D发现技术中存在的发现延迟，由于需要与网络侧实体进行交互，因此延迟较大，不利于V2X业务的传输。Many V2X applications will improve safety, vehicle traffic and energy consumption. V2X is also conducive to future cruise-assisted roads and autonomous driving. In the prior art, Dedicated Short Range Communications (DSRC) is usually used to transmit V2X services, but its transmission indicators such as communication distance, delay or reliability cannot meet the technical requirements of V2X services for transmission indicators. The industry is studying a device-to-device (D2D) discovery technology to transmit V2V emergency service content. The discovery delay in the traditional D2D discovery technology, because of the need to interact with the network side entity, the delay is large, which is not conducive to the transmission of V2X services.

发明内容Summary of the invention

本发明实施例所要解决的技术问题在于，提供一种信息传输的方法及装置。以解决V2X业务传输延迟较大的问题。A technical problem to be solved by embodiments of the present invention is to provide a method and apparatus for information transmission. To solve the problem of large transmission delay of V2X service.

为了解决上述技术问题，本发明实施例第一方面提供了一种信息传输的方法，包括：In order to solve the above technical problem, a first aspect of the embodiments of the present invention provides a method for information transmission, including:

路侧单元RSU接收终端发送的D2D发现映射信息，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识和临近服务应用代码的映射关系以及 所述映射关系的有效期；The roadside unit RSU receives the D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier cached by the terminal and the adjacent service application code, and The validity period of the mapping relationship;

所述RSU将所述映射信息转发至符合预设条件的其他路侧单元；Transmitting, by the RSU, the mapping information to other roadside units that meet preset conditions;

所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。The RSU configures part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal belonging to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.

其中，所述方法还包括：The method further includes:

所述RSU与临近服务功能实体对所述映射信息中新增的内容进行真实性和/或时效性的验证。The RSU and the proximity service function entity verify the authenticity and/or timeliness of the newly added content in the mapping information.

其中，所述预设条件包括以下至少一种：The preset condition includes at least one of the following:

位于预设路段或预设区域；Located in a preset section or a preset area;

与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold.

其中，所述映射信息通过用户面数据通道传输，且在所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容时，根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。The mapping information is transmitted through the user plane data channel, and when the RSU configures part or all of the mapping information for the terminal belonging to the RSU, according to the road segment and/or the location range information where the terminal is located. And configuring, for the terminal, mapping information that matches the section and/or location range information of the location.

其中，在所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容之前，还包括：Before the RSU configures part or all of the mapping information for the terminal that belongs to the RSU, the method further includes:

所述RSU加入RSU分组，位于同一RSU分组中的RSU缓存的映射信息相同；The RSU joins the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same;

所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容，包括：The RSU configures part or all of the mapping information for the terminal that belongs to the RSU, including:

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则所述RSU无需向该终端广播其缓存的映射信息；If the RSU to which the terminal that is in the coverage of the RSU belongs is located in the same RSU group as the RSU, the RSU does not need to broadcast the cached mapping information to the terminal;

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述RSU与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述RSU指示该终端继续使用原有的映射信息，若匹配不成功，则所述RSU向该终端广播其缓存的映射信息。If the RSU to which the terminal that is in the range of the RSU coverage is not located in the same RSU group, after the terminal switches to the RSU, the RSU performs mapping information matching with the RSU to which the terminal belongs before the handover. If the matching is successful, the RSU indicates that the terminal continues to use the original mapping information, and if the matching is unsuccessful, the RSU broadcasts its cached mapping information to the terminal.

本发明实施例第二方面提供了一种路侧单元，包括：A second aspect of the embodiments of the present invention provides a roadside unit, including:

接收模块，用于接收终端发送的D2D发现映射信息，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识和临近服务应用代码的映射关系以及所述映射关系的有效期； a receiving module, configured to receive D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier of the terminal cache and the adjacent service application code, and an expiration date of the mapping relationship;

转发模块，用于所述映射信息转发至符合预设条件的其他路侧单元；a forwarding module, configured to forward the mapping information to other roadside units that meet preset conditions;

配置模块，用于为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。And a configuration module, configured to configure part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal that belongs to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.

其中，所述路侧单元还包括：The roadside unit further includes:

验证模块，用于与临近服务功能实体对所述映射信息中新增的内容进行真实性和/或时效性的验证。And a verification module, configured to verify authenticity and/or timeliness of the newly added content in the mapping information with the proximity service function entity.

其中，所述预设条件包括以下至少一种：The preset condition includes at least one of the following:

位于预设路段或预设区域；Located in a preset section or a preset area;

与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold.

其中，所述映射信息通过用户面数据通道传输，且所述配置模块具体用于根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。The mapping information is transmitted through the user plane data channel, and the configuration module is specifically configured to configure, according to the road segment and/or the location range information of the terminal, the terminal segment and/or the location range information. Matching mapping information.

其中，所述路侧单元还包括：The roadside unit further includes:

加入模块，用于加入RSU分组，位于同一RSU分组中的RSU缓存的映射信息相同；The module is added to join the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same;

所述配置模块具体用于：The configuration module is specifically configured to:

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则无需向该终端广播其缓存的映射信息；If the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, it is not necessary to broadcast the cached mapping information to the terminal;

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述配置模块与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述配置模块指示该终端继续使用原有的映射信息，若匹配不成功，则所述配置模块向该终端广播其缓存的映射信息。If the RSU to which the terminal that is in the range of the RSU coverage is not located in the same RSU group, after the terminal switches to the RSU, the configuration module performs mapping information with the RSU to which the terminal belongs before the handover. If the matching is successful, the configuration module instructs the terminal to continue to use the original mapping information. If the matching is unsuccessful, the configuration module broadcasts the cached mapping information to the terminal.

实施本发明实施例，具有如下有益效果：Embodiments of the present invention have the following beneficial effects:

通过路侧单元接收终端发送的D2D发现映射信息，并由RSU完成映射信息的转发扩散以及对其他终端的配置，从而实现了由终端与RSU的协作就能完成映射信息在车联网终端之间的维护，整个过程无需和核心网的网络侧进行交互，从而减少了D2D发现技术用于V2X业务的延迟，尤其利于V2X紧急业务的传输，充分满足了V2X业务对传输延迟的需求，可以为用户提供更高速更稳定更 快速的V2X业务传输，从而提高了交通安全度。The D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals. Maintenance, the entire process does not need to interact with the network side of the core network, thereby reducing the delay of the D2D discovery technology for the V2X service, especially for the transmission of the V2X emergency service, fully satisfying the transmission delay requirement of the V2X service, and providing the user with Higher speed and more stable Fast V2X service transmission, which improves traffic safety.

附图说明DRAWINGS

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

图1是本发明信息传输的方法的第一实施例的流程示意图；1 is a schematic flow chart of a first embodiment of a method for transmitting information according to the present invention;

图2是本发明信息传输的方法的第二实施例的流程示意图；2 is a schematic flow chart of a second embodiment of a method for transmitting information according to the present invention;

图3是本发明信息传输的方法的第三实施例的流程示意图；3 is a schematic flow chart of a third embodiment of a method for transmitting information according to the present invention;

图4是本发明路侧单元的第一实施例的组成示意图；Figure 4 is a schematic view showing the composition of the first embodiment of the roadside unit of the present invention;

图5是本发明路侧单元的第二实施例的组成示意图；Figure 5 is a schematic view showing the composition of a second embodiment of the roadside unit of the present invention;

图6是本发明路侧单元的第三实施例的组成示意图。Figure 6 is a schematic view showing the composition of a third embodiment of the roadside unit of the present invention.

具体实施方式detailed description

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

通过设备与设备(Device-to-Device，简称D2D)技术进行V2X业务传输有两种方式，一种采用D2D发现技术的传输协议，在此协议下可以将V2X的应用层消息作为D2D发现消息的净荷，通过物理层侧向发现通道(Physical layer Sidelink Discovery Channel，简称PSDCH)以广播的方式发出；另一种则基于D2D通信技术的传输协议，在此协议下可以将V2X的应用层消息作为D2D通信数据在物理层侧向控制信道(Physical layer Sidelink Control Channel，简称PSCCH)和物理层侧向共享信道(Physical layer Sidelink Shared Channel，简称PSSCH)传输。本发明实施例主要考虑基于D2D发现技术的传输协议进行V2X业务的传输尤其是V2V和/或V2I业务的传输。There are two ways to transmit V2X services through Device-to-Device (D2D) technology. A transmission protocol using D2D discovery technology, in which V2X application layer messages can be used as D2D discovery messages. The payload is sent by broadcast through the Physical Layer Sidelink Discovery Channel (PSDCH); the other is based on the transmission protocol of the D2D communication technology, in which the V2X application layer message can be used as the payload. The D2D communication data is transmitted on a physical layer side link control channel (PSCCH) and a physical layer side link shared channel (PSSCH). The embodiments of the present invention mainly consider a transmission protocol based on the D2D discovery technology for transmitting V2X services, especially V2V and/or V2I services.

D2D发现技术中存在两种资源分配方式，即基站调度模式和资源池模式，其中基站调度模式即由基站根据其所能调度的资源主动为其覆盖的终端进行资 源调度；而资源池模式，则是由部分资源组成资源池，不同的终端通过资源请求来使用资源池中的资源，在使用时，资源池管理器为已使用的资源附上占用的标识，当使用完后，将该资源回收至资源池并解除占用的标识。基于这两种方式进行D2D发现时，都可能产生信令上的延迟，特别是如果网络侧实体被牵涉(involve)进来时，产生的时延更多。There are two resource allocation modes in the D2D discovery technology, namely, a base station scheduling mode and a resource pool mode, where the base station scheduling mode is funded by the base station according to the resources that the base station can actively schedule for its coverage. Source scheduling; in the resource pool mode, a resource pool is composed of some resources, and different terminals use resources in the resource pool through resource requests. When used, the resource pool manager attaches an occupied identifier to the used resources. When used, the resource is recycled to the resource pool and the occupied ID is removed. When D2D discovery is performed based on these two methods, a delay in signaling may occur, especially if the network side entity is involved, the delay is generated more.

在V2X业务传输的场景下，本发明实施例中网络侧的控制V2X业务传输的实体可以基于D2D功能实体即临近服务功能实体(Proximity Based Services Function，简称ProSe Function)实现，对其进行增强后可用作车联网控制的实体。这种方式主要适合于用D2D技术来进行V2X业务传输。V2X的相关控制可以与D2D功能实体独立部署，也可以集成设置，但从协议简化和重用的角度出发，可以重用终端与ProSe Function之间的PC3接口。当然，控制V2X业务传输的功能实体或装置也可以独立设置，本发明实施例不作任何限定。路侧单元(Road Side Unit,简称RSU)可以由静止的终端来实现，也可以由小型的基站来实现。在本发明实施例中，RSU主要以基站方式实现，也可以考虑用能够为车载终端提供汇聚接入的基于终端类型的微型基站(T-SC)来实现。V2X业务传输包括V2V和V2I都可以采用基于D2D协议即通过PC5接口来进行传输。在本发明中所述的终端可以是支持D2D协议的用户手持的移动终端，也可以是集成在车辆内的车载终端。In the scenario of the V2X service transmission, the entity that controls the V2X service transmission on the network side in the embodiment of the present invention may be implemented based on a D2D functional entity, that is, a Proximity Based Services Function (ProSe Function). Used as an entity for vehicle network control. This method is mainly suitable for V2X service transmission using D2D technology. The V2X related control can be deployed independently of the D2D functional entity or integrated, but from the perspective of protocol simplification and reuse, the PC3 interface between the terminal and the ProSe Function can be reused. Of course, the functional entity or device that controls the V2X service transmission can also be set independently, which is not limited in the embodiment of the present invention. The Road Side Unit (RSU) can be implemented by a stationary terminal or by a small base station. In the embodiment of the present invention, the RSU is mainly implemented in a base station manner, and may also be implemented by using a terminal type-based micro base station (T-SC) capable of providing aggregation access for an in-vehicle terminal. V2X service transmission, including V2V and V2I, can be transmitted through the PC5 interface based on the D2D protocol. The terminal described in the present invention may be a mobile terminal held by a user supporting the D2D protocol, or may be an in-vehicle terminal integrated in the vehicle.

请参照图1，为本发明信息传输的方法的第一实施例的流程示意图，在本实施例中，所述方法包括以下步骤：1 is a schematic flowchart of a first embodiment of a method for transmitting information according to the present invention. In this embodiment, the method includes the following steps:

S101，路侧单元RSU接收终端发送的D2D发现映射信息。S101. The roadside unit RSU receives the D2D discovery mapping information sent by the terminal.

其中，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识(ProSe Application ID)和临近服务应用代码(ProSe Application Code)的映射关系以及所述映射关系的有效期；The D2D discovery mapping information includes a mapping relationship between a ProSe Application ID and a ProSe Application Code cached by the terminal and an expiration date of the mapping relationship;

可选地，终端汇报映射信息不限于使用终端与RSU之间的无线资源控制(Radio Resource Control，简称RRC)或者PC5控制面协议，可使用用户面的网络之间互连的协议(Internet Protocol，简称IP)连接在应用层进行，这样可以减少对宏基站控制资源的占用，也可以减少对现有规范的影响。Optionally, the terminal reporting mapping information is not limited to a radio resource control (Radio Resource Control, RRC for short) or a PC5 control plane protocol between the terminal and the RSU, and may use a protocol (Internet Protocol, which is interconnected between users' networks). The IP) connection is performed at the application layer, which can reduce the occupation of macro base station control resources and reduce the impact on existing specifications.

S102，所述RSU将所述映射信息转发至符合预设条件的其他路侧单元。S102. The RSU forwards the mapping information to other roadside units that meet preset conditions.

其中，所述预设条件包括以下至少一种： The preset condition includes at least one of the following:

位于预设路段或预设区域；Located in a preset section or a preset area;

与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold.

具体地，所述RSU可以将映射信息通过RSU之间的接口将映射信息进行转发，借助于有线回程链路可以使得该映射信息进行快速及时的扩散。Specifically, the RSU may forward the mapping information through the interface between the RSUs, and the mapping information may be quickly and timely spread by means of the wired backhaul link.

在转发扩散时，所述RSU可以通过对终端移动性的预测来对映射信息进行有针对性的扩散和传播。例如，当一个车辆进入一段高速公路的入口时，即可通过这种机制，使得该段高速公路的RSU中都具有这些映射信息。或者使得与当前RSU临近的一些RSU具有这些映射信息。或者可以两种条件同时考虑来进行映射信息的转发。从而提高映射信息转发的目的性。When the forwarding is spread, the RSU can perform targeted diffusion and propagation of the mapping information by predicting the mobility of the terminal. For example, when a vehicle enters the entrance of a section of a highway, this mechanism can be used to have such mapping information in the RSU of the section of the highway. Or some of the RSUs that are adjacent to the current RSU have these mapping information. Or the mapping information can be forwarded by considering both conditions. Thereby improving the purpose of mapping information forwarding.

S103，所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。S103. The RSU configures part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal that belongs to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.

此处的D2D发现相关消息可以包括但不限于终端之间进行D2D发现时交互的消息，如D2D发现消息和D2D发现消息的响应消息等。The D2D discovery related message herein may include, but is not limited to, a message that the terminal interacts during D2D discovery, such as a D2D discovery message and a response message of the D2D discovery message.

可选地，所述映射信息可以通过用户面数据通道传输，从而可以减少映射信息配置时的控制信令。Optionally, the mapping information may be transmitted through a user plane data channel, so that control signaling when mapping information configuration may be reduced.

且在所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容时，可以根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。例如，终端进入某个高速路口，则所述RSU可以仅将该段高速路上涉及到的映射信息发送给终端，或者终端进入到某个位置范围时，所述RSU可以仅将该位置范围内涉及到的映射信息发送终端，从而减少映射信息的传输量，提升出映射信息发送和配置的效率和目的性。当然，所述RSU也可以直接将其缓存的所有映射信息发送给终端，本发明实施例不做任何限定。And when the RSU configures part or all of the content of the mapping information for the terminal that belongs to the RSU, the terminal may be configured with the road segment according to the road segment and/or the location range information where the terminal is located. / or mapping information that matches the location range information. For example, when the terminal enters a certain expressway, the RSU may only send the mapping information related to the segment of the highway to the terminal, or when the terminal enters a certain range of locations, the RSU may only involve the location range. The mapping information is sent to the terminal, thereby reducing the transmission amount of the mapping information, and improving the efficiency and purpose of the mapping information transmission and configuration. Of course, the RSU can also directly send all the mapping information of the cache to the terminal, which is not limited in the embodiment of the present invention.

通过路侧单元接收终端发送的D2D发现映射信息，并由RSU完成映射信息的转发扩散以及对其他终端的配置，从而实现了由终端与RSU的协作就能完成映射信息在车联网终端之间的维护，整个过程无需和核心网的网络侧进行交互，从而减少了D2D发现技术用于V2X业务的延迟，尤其利于V2X紧急业务的传输，充分满足了V2X业务对传输延迟的需求，可以为用户提供更高速更稳定更快速的V2X业务传输，从而提高了交通安全度。 The D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals. Maintenance, the entire process does not need to interact with the network side of the core network, thereby reducing the delay of the D2D discovery technology for the V2X service, especially for the transmission of the V2X emergency service, fully satisfying the transmission delay requirement of the V2X service, and providing the user with Higher speed, more stable and faster V2X service transmission, thus improving traffic safety.

请参照图2，为本发明信息传输的方法的第二实施例的流程示意图，在本实施例中，步骤S201与步骤S101相同，步骤S203-S204和步骤S102-S103相同，此处不再赘述，在与步骤S101相同的步骤S201之后，所述方法还包括以下步骤：2 is a schematic flowchart of the second embodiment of the method for transmitting information according to the present invention. In this embodiment, step S201 is the same as step S101, and steps S203-S204 are the same as steps S102-S103, and details are not described herein again. After the same step S201 as step S101, the method further includes the following steps:

S202，所述RSU与临近服务功能实体(ProSe Function)对所述映射信息中新增的内容进行真实性和/或时效性的验证。S202. The RSU and the ProSe Function perform verification on authenticity and/or timeliness of the newly added content in the mapping information.

进行验证的主要目的是为了保证RSU缓存的映射信息的有效性，防止假冒信息，以及与网络侧设备的不同步。The main purpose of the verification is to ensure the validity of the mapping information of the RSU cache, prevent the spoofing information, and the synchronization with the network side device.

其中，所述RSU与ProSe Function之间可配置高速大容量的有线网络连接，能够实现高速和实时的交互。从而减小验证所产生的时延。Wherein, the RSU and the ProSe Function can be configured with a high-speed and large-capacity wired network connection, which can realize high-speed and real-time interaction. Thereby reducing the delay caused by the verification.

请参照图3，为本发明信息传输的方法的第三实施例的流程示意图，在本实施例中，步骤S301-S304与图2中的步骤S201-S204相同，此处不再赘述，在与步骤S204相同的S304之后，所述方法还包括以下步骤：Referring to FIG. 3, it is a schematic flowchart of a third embodiment of a method for transmitting information according to the present invention. In this embodiment, steps S301-S304 are the same as steps S201-S204 in FIG. 2, and details are not described herein again. After the same S304 in step S204, the method further includes the following steps:

S305，所述RSU加入RSU分组(RSU group)。S305, the RSU joins an RSU group (RSU group).

其中，位于同一RSU分组中的RSU缓存的映射信息相同。The mapping information of the RSU caches located in the same RSU packet is the same.

S306，若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则所述RSU无需向该终端广播其缓存的映射信息。S306. If the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, the RSU does not need to broadcast the cached mapping information to the terminal.

S307，若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述RSU与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述RSU指示该终端继续使用原有的映射信息，若匹配不成功，则所述RSU向该终端广播其缓存的映射信息。S307. If the RSU to which the terminal that enters the coverage of the RSU belongs is not located in the same RSU packet, after the terminal switches to the RSU, the RSU maps with the RSU to which the terminal belongs before the handover. If the matching is successful, the RSU indicates that the terminal continues to use the original mapping information. If the matching is unsuccessful, the RSU broadcasts its cached mapping information to the terminal.

在本实施例中，为了减少RSU的不必要广播，可以为至少两个RSU构建一个映射信息完全同步的RSU分组，同一分组以内的RSU之间映射信息完全同步，这样，当车联网终端在一个分组内的RSU之间发生位置变化甚至切换时，不需要进行映射消息的更新，同样地，RSU也无需广播映射信息给该终端，从而节省了能耗和信令开销。In this embodiment, in order to reduce unnecessary broadcast of the RSU, an RSU packet with completely synchronized mapping information may be constructed for at least two RSUs, and mapping information between RSUs within the same packet is completely synchronized, so that when the car network terminal is in one When a location change or even a handover occurs between RSUs in a packet, there is no need to update the mapping message. Similarly, the RSU does not need to broadcast mapping information to the terminal, thereby saving energy consumption and signaling overhead.

而对于不属于同一个RSU group的RSU，终端跟随车辆在行驶过程中，会执行RSU之间的切换。在切换完成后，可以由基站决定是否需要发送映射信息给终端。例如，该过程可以由切换后的RSU与终端之间的无线资源控制协议连 接重构(RRC Connection Reconfiguration)消息来触发。For an RSU that does not belong to the same RSU group, the terminal follows the vehicle while driving, and performs switching between RSUs. After the handover is completed, the base station may decide whether it is necessary to send mapping information to the terminal. For example, the process can be connected by a radio resource control protocol between the switched RSU and the terminal. Triggered by an RRC Connection Reconfiguration message.

且在决定需要发送之后，如果RSU之间存在映射信息的同步和比对关系，则在发送之前，可以先进行映射信息的匹配。After the transmission and the comparison relationship of the mapping information exist between the RSUs, the mapping information matching may be performed before the transmission.

如果映射信息完全相同，则由新的RSU向终端指示可以继续使用原有的广播信息。If the mapping information is identical, the new RSU indicates to the terminal that the original broadcast information can continue to be used.

如果映射信息不同，或者无法比对，则由新的RSU向终端广播映射信息。If the mapping information is different or cannot be compared, the mapping information is broadcast to the terminal by the new RSU.

需要说明的是，除了RSU主动加入分组之外，也可以由基站进行统一分组或进行组内RSU的调整。It should be noted that, in addition to the RSU actively joining the packet, the base station may perform unified grouping or perform adjustment of the intra-group RSU.

请参照图4，为本发明路侧单元的第一实施例的组成示意图；在本实施例中，所述终端包括：Referring to FIG. 4, it is a schematic diagram of a composition of a first embodiment of a roadside unit according to the present invention. In this embodiment, the terminal includes:

接收模块100，用于接收终端发送的D2D发现映射信息，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识和临近服务应用代码的映射关系以及所述映射关系的有效期；The receiving module 100 is configured to receive the D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier and the adjacent service application code cached by the terminal, and an expiration date of the mapping relationship;

转发模块200，用于所述映射信息转发至符合预设条件的其他路侧单元；The forwarding module 200 is configured to forward the mapping information to other roadside units that meet preset conditions;

配置模块300，用于为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。The configuration module 300 is configured to configure part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal belonging to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information.

可选地，所述预设条件包括以下至少一种：Optionally, the preset condition includes at least one of the following:

位于预设路段或预设区域；Located in a preset section or a preset area;

与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold.

可选地，所述映射信息通过用户面数据通道传输，且所述配置模块300具体用于根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。Optionally, the mapping information is transmitted through the user plane data channel, and the configuration module 300 is specifically configured to configure, according to the road segment and/or the location range information of the terminal, the terminal segment and/or the located road segment and/or Mapping information that matches the location range information.

请参照图5，为本发明路侧单元的第二实施例的组成示意图，在本实施例中，与图4所示实施例相比，本发明实施例中所述的路侧单元还包括：5 is a schematic diagram of a composition of a second embodiment of a roadside unit according to the present invention. In this embodiment, the roadside unit according to the embodiment of the present invention further includes:

验证模块400，用于与临近服务功能实体对所述映射信息中新增的内容进行真实性和/或时效性的验证。The verification module 400 is configured to verify the authenticity and/or timeliness of the newly added content in the mapping information with the proximity service function entity.

请参照图6，为本发明路侧单元的第三实施例的组成示意图，在本实施例中，与图5所示实施例相比，本发明实施例中所述的路侧单元还包括：Referring to FIG. 6 , it is a schematic diagram of a composition of a third embodiment of a roadside unit according to the present invention. In this embodiment, the roadside unit according to the embodiment of the present invention further includes:

加入模块500，用于加入RSU分组，位于同一RSU分组中的RSU缓存的 映射信息相同；The joining module 500 is configured to join the RSU packet and is located in the RSU cache in the same RSU packet. The mapping information is the same;

所述配置模块300具体用于：The configuration module 300 is specifically configured to:

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则无需向该终端广播其缓存的映射信息；If the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, it is not necessary to broadcast the cached mapping information to the terminal;

若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述配置模块300与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述配置模块300指示该终端继续使用原有的映射信息，若匹配不成功，则所述配置模块300向该终端广播其缓存的映射信息。If the RSU to which the terminal that is in the coverage of the RSU is not located in the same RSU group as the RSU, after the terminal switches to the RSU, the configuration module 300 maps with the RSU to which the terminal belongs before the handover. If the matching is successful, the configuration module 300 instructs the terminal to continue to use the original mapping information. If the matching is unsuccessful, the configuration module 300 broadcasts the cached mapping information to the terminal.

以上接收模块100、转发模块200、配置模块300、验证模块400和加入模块500可以独立存在，也可以集成设置，接收模块100、转发模块200、配置模块300、验证模块400或加入模块500可以以硬件的形式独立于路侧单元的处理器单独设置，且设置形式可以是微处理器的形式；也可以以硬件形式内嵌于该路侧单元的处理器中，还可以以软件形式存储于该路侧单元的存储器中，以便于该路侧单元的处理器调用执行以上接收模块100、转发模块200、配置模块300、验证模块400和加入模块500对应的操作。The receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, and the joining module 500 may exist independently or may be integrated. The receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, or the joining module 500 may The form of the hardware is separately set independently of the processor of the roadside unit, and the setting form may be in the form of a microprocessor; or may be embedded in the processor of the roadside unit in hardware form, or may be stored in software in the form. In the memory of the roadside unit, the processor of the roadside unit is instructed to perform operations corresponding to the above receiving module 100, the forwarding module 200, the configuration module 300, the verification module 400, and the adding module 500.

例如，在本发明路侧单元的第三实施例(图6所示的实施例)中，配置模块300可以为该路侧单元的处理器，而接收模块100、转发模块200、验证模块400和加入模块500的功能可以内嵌于该处理器中，也可以独立于处理器单独设置，也可以以软件的形式存储于存储器中，由处理器调用实现其功能。本发明实施例不做任何限制。以上处理器可以为中央处理单元(CPU)、微处理器、单片机等。For example, in the third embodiment of the roadside unit of the present invention (the embodiment shown in FIG. 6), the configuration module 300 may be a processor of the roadside unit, and the receiving module 100, the forwarding module 200, the verification module 400, and The function of adding module 500 may be embedded in the processor, or may be set separately from the processor, or may be stored in the memory in the form of software, and the function is called by the processor. The embodiment of the invention does not impose any limitation. The above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer, or the like.

需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其它实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于装置实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。It should be noted that the various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments are mutually referred to. can. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

通过上述实施例的描述，本发明具有以下优点：Through the description of the above embodiments, the present invention has the following advantages:

通过路侧单元接收终端发送的D2D发现映射信息，并由RSU完成映射信息的转发扩散以及对其他终端的配置，从而实现了由终端与RSU的协作就能完成映射信息在车联网终端之间的维护，整个过程无需和核心网的网络侧进行交互， 从而减少了D2D发现技术用于V2X业务的延迟，尤其利于V2X紧急业务的传输，充分满足了V2X业务对传输延迟的需求，可以为用户提供更高速更稳定更快速的V2X业务传输，从而提高了交通安全度。The D2D discovery mapping information sent by the terminal is received by the roadside unit, and the forwarding and spreading of the mapping information and the configuration of other terminals are completed by the RSU, thereby realizing the cooperation between the terminal and the RSU to complete mapping information between the vehicle networking terminals. Maintenance, the entire process does not need to interact with the network side of the core network, Therefore, the delay of the D2D discovery technology for the V2X service is reduced, especially for the transmission of the V2X emergency service, which fully satisfies the requirement of the transmission delay of the V2X service, and can provide the user with higher speed, more stable and faster V2X service transmission, thereby improving the Traffic safety.

本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，简称ROM)或随机存储记忆体(Random Access Memory，简称RAM)等。One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。 The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims (10)

一种信息传输的方法，其特征在于，包括：A method for transmitting information, comprising: 路侧单元RSU接收终端发送的D2D发现映射信息，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识和临近服务应用代码的映射关系以及所述映射关系的有效期；The roadside unit RSU receives the D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier of the terminal cache and the proximity service application code, and an expiration date of the mapping relationship; 所述RSU将所述映射信息转发至符合预设条件的其他路侧单元；Transmitting, by the RSU, the mapping information to other roadside units that meet preset conditions; 所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。The RSU configures part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal belonging to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information. 如权利要求所述1的方法，其特征在于，在所述路侧单元RSU接收终端发送的D2D发现映射信息之后，所述方法还包括：The method according to claim 1, wherein after the roadside unit RSU receives the D2D discovery mapping information sent by the terminal, the method further includes: 所述RSU与临近服务功能实体对所述映射信息中新增的内容进行真实性和/或时效性的验证。The RSU and the proximity service function entity verify the authenticity and/or timeliness of the newly added content in the mapping information. 如权利要求1所述的方法，其特征在于，所述预设条件包括以下至少一种：The method of claim 1 wherein said predetermined condition comprises at least one of the following: 位于预设路段或预设区域；Located in a preset section or a preset area; 与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold. 如权利要求1所述的方法，其特征在于，所述映射信息通过用户面数据通道传输，且在所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容时，根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。The method according to claim 1, wherein the mapping information is transmitted through a user plane data channel, and when the RSU configures part or all of the mapping information for a terminal belonging to the RSU, according to The link segment and/or location range information in which the terminal is located configures the terminal with mapping information that matches the route segment and/or location range information. 如权利要求1-4任一项所述的方法，其特征在于，在所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容之前，还包括：The method according to any one of claims 1-4, wherein before the RSU configures part or all of the content of the mapping information for the terminal that belongs to the RSU, the method further includes: 所述RSU加入RSU分组，位于同一RSU分组中的RSU缓存的映射信息相同；The RSU joins the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same; 所述RSU为归属于所述RSU的终端配置所述映射信息的部分或全部内容， 包括：The RSU configures part or all of the mapping information for a terminal that belongs to the RSU, include: 若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则所述RSU无需向该终端广播其缓存的映射信息；If the RSU to which the terminal that is in the coverage of the RSU belongs is located in the same RSU group as the RSU, the RSU does not need to broadcast the cached mapping information to the terminal; 若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述RSU与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述RSU指示该终端继续使用原有的映射信息，若匹配不成功，则所述RSU向该终端广播其缓存的映射信息。If the RSU to which the terminal that is in the range of the RSU coverage is not located in the same RSU group, after the terminal switches to the RSU, the RSU performs mapping information matching with the RSU to which the terminal belongs before the handover. If the matching is successful, the RSU indicates that the terminal continues to use the original mapping information, and if the matching is unsuccessful, the RSU broadcasts its cached mapping information to the terminal. 一种路侧单元，其特征在于，包括：A roadside unit, comprising: 接收模块，用于接收终端发送的D2D发现映射信息，所述D2D发现映射信息中包括该终端缓存的临近服务应用标识和临近服务应用代码的映射关系以及所述映射关系的有效期；a receiving module, configured to receive D2D discovery mapping information sent by the terminal, where the D2D discovery mapping information includes a mapping relationship between the proximity service application identifier of the terminal cache and the adjacent service application code, and an expiration date of the mapping relationship; 转发模块，用于所述映射信息转发至符合预设条件的其他路侧单元；a forwarding module, configured to forward the mapping information to other roadside units that meet preset conditions; 配置模块，用于为归属于所述RSU的终端配置所述映射信息的部分或全部内容，以便归属于所述RSU的终端根据配置的映射信息进行D2D发现相关消息的传输。And a configuration module, configured to configure part or all of the mapping information for the terminal that belongs to the RSU, so that the terminal that belongs to the RSU performs the transmission of the D2D discovery related message according to the configured mapping information. 如权利要求6所述的路侧单元，其特征在于，所述路侧单元还包括：The roadside unit according to claim 6, wherein the roadside unit further comprises: 验证模块，用于与临近服务功能实体对所述映射信息中新增的内容进行真实性和/或时效性的验证。And a verification module, configured to verify authenticity and/or timeliness of the newly added content in the mapping information with the proximity service function entity. 如权利要求6所述的路侧单元，其特征在于，所述预设条件包括以下至少一种：The roadside unit according to claim 6, wherein the preset condition comprises at least one of the following: 位于预设路段或预设区域；Located in a preset section or a preset area; 与所述RSU的距离小于或等于预设阈值。The distance from the RSU is less than or equal to a preset threshold. 如权利要求6所述的路侧单元，其特征在于，所述映射信息通过用户面数据通道传输，且所述配置模块具体用于根据终端所处的路段和/或位置范围信息，为终端配置与所述所处的路段和/或位置范围信息匹配的映射信息。 The roadside unit according to claim 6, wherein the mapping information is transmitted through a user plane data channel, and the configuration module is specifically configured to configure the terminal according to the road segment and/or the location range information of the terminal. Mapping information that matches the road segment and/or location range information in which it is located. 如权利要求9所述的路侧单元，其特征在于，所述路侧单元还包括：The roadside unit according to claim 9, wherein the roadside unit further comprises: 加入模块，用于加入RSU分组，位于同一RSU分组中的RSU缓存的映射信息相同；The module is added to join the RSU packet, and the mapping information of the RSU cache located in the same RSU packet is the same; 所述配置模块具体用于：The configuration module is specifically configured to: 若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU位于同一RSU分组，则无需向该终端广播其缓存的映射信息；If the RSU to which the terminal that enters the coverage of the RSU belongs is located in the same RSU packet as the RSU, it is not necessary to broadcast the cached mapping information to the terminal; 若进入所述RSU覆盖范围的终端所归属的RSU与所述RSU不位于同一RSU分组，则在该终端切换至所述RSU之后，所述配置模块与该终端在切换前归属的RSU进行映射信息匹配，若匹配成功，则所述配置模块指示该终端继续使用原有的映射信息，若匹配不成功，则所述配置模块向该终端广播其缓存的映射信息。 If the RSU to which the terminal that is in the range of the RSU coverage is not located in the same RSU group, after the terminal switches to the RSU, the configuration module performs mapping information with the RSU to which the terminal belongs before the handover. If the matching is successful, the configuration module instructs the terminal to continue to use the original mapping information. If the matching is unsuccessful, the configuration module broadcasts the cached mapping information to the terminal.
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