WO2017075920A1 - 用于车辆通信的数据传输方法及装置、基站和网络侧设备 - Google Patents

用于车辆通信的数据传输方法及装置、基站和网络侧设备 Download PDF

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Publication number
WO2017075920A1
WO2017075920A1 PCT/CN2016/072861 CN2016072861W WO2017075920A1 WO 2017075920 A1 WO2017075920 A1 WO 2017075920A1 CN 2016072861 W CN2016072861 W CN 2016072861W WO 2017075920 A1 WO2017075920 A1 WO 2017075920A1
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Prior art keywords
vehicle communication
communication data
service
broadcast
unicast
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PCT/CN2016/072861
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English (en)
French (fr)
Inventor
雷艺学
张云飞
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2017075920A1 publication Critical patent/WO2017075920A1/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
    • H04W4/06—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
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method for vehicle communication, a data transmission device for vehicle communication, a base station, and a network side device.
  • V2X Vehicle to X
  • the V2X includes V2V (Vehicle to Vehicle), V2P (Vehicle to Individual Person), V2I (Vehicle to Infrastructure), and the like.
  • V2V communication can be performed through the Uu interface (the interface between the user equipment and the base station) and the PC5 interface (the interface between the user equipment and the user equipment), and 3GPP is currently studying and discussing two mechanisms.
  • the existing downlink transmission mechanism includes Uu interface unicast, UuMS eMBMS (Enhanced Multimedia Broadcast Multicast Service), that is, multi-cell broadcast service support, and single cell broadcast mechanism, that is, Single-Cell PTM (Point To Multi-point).
  • V2V transmission may be one-to-one or one-to-many.
  • vehicle 108 may need to be sent to one or more of vehicle 110, vehicle 112, vehicle 114, vehicle 116, vehicle 118, which may be located in a cell covered by base station 102. That is, the transmitted vehicle 108 belongs to the same serving cell, and may also be located under other cells.
  • the transmission mechanism based on the Uu interface needs to determine whether the Uu interface unicast mechanism or the eMBMS or the SC-PTM mechanism is adopted, but the prior art has not implemented a scheme for selecting a transmission mechanism according to the distribution of the receiving terminal and the cell structure.
  • the invention is based on at least one of the above technical problems, and proposes a new data transmission scheme for vehicle communication, which realizes the support of the VuV transmission mechanism based on the Uu interface, and can realize efficient and save transmission resources. V2V communication.
  • a data transmission method for vehicle communication which is applicable to a base station or a network side device, includes: receiving vehicle communication data transmitted by a transmission terminal; and receiving the vehicle communication according to the present invention Determining whether the vehicle communication data is transmitted by using a unicast mode or a broadcast mode according to the number of receiving terminals of the data, or according to the indication information sent by the transmitting terminal; when determining that the vehicle communication data is transmitted by using the unicast mode, The vehicle communication data is directly transmitted to the receiving terminal by the unicast mode; when it is determined that the vehicle communication data is transmitted by using the broadcast mode, determining a range in which the vehicle communication data needs to be broadcasted, and according to the vehicle The communication data needs to be broadcasted, and the vehicle communication data is selected to be transmitted by means of single cell broadcast or multi-cell broadcast.
  • the base station or the network side device can independently select the transmission of the vehicle communication data according to the number of the receiving terminals.
  • the mechanism determines whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the indication information sent by the transmitting terminal, so that the base station or the network side device can select the transmission mechanism of the vehicle communication data according to the indication of the terminal.
  • the base station or the network side device determines to transmit the vehicle communication data by broadcasting, it is possible to select whether to use single cell broadcast (ie, SC-PTM) or multi-cell broadcast (eMBMS) according to the range in which the vehicle communication data needs to be broadcasted.
  • SC-PTM single cell broadcast
  • eMBMS multi-cell broadcast
  • the step of determining whether to transmit the vehicle communication data by using a unicast mode or a broadcast mode according to the number of receiving terminals that receive the vehicle communication data includes: the number of the receiving terminals is smaller than Or equal to the first predetermined number, the decision is adopted The unicast mode transmits the vehicle communication data; and when the number of the receiving terminals is greater than the first predetermined number, determining to transmit the vehicle communication data by using the broadcast mode.
  • the vehicular communication data is transmitted in a unicast manner, so that when the number of receiving terminals is small, the manner of broadcasting is avoided to cause wireless transmission resources. Waste; and by transmitting the vehicle communication data in a broadcast manner when the number of receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
  • the step of determining whether to transmit the vehicle communication data by using a unicast mode or a broadcast mode, according to the indication information sent by the sending terminal specifically includes: according to the indication information sent by the sending terminal. Determining whether the vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service; and determining that the vehicle communication service is the unicast service, determining to transmit the vehicle communication data by using the unicast mode; When it is determined that the vehicle communication service is the multicast service, it is determined that the vehicle communication data is transmitted by using the broadcast mode.
  • the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirements of the vehicle communication service, so as to ensure efficient V2V communication that saves transmission resources.
  • the step of determining whether the vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service, according to the indication information sent by the sending terminal specifically includes:
  • the vehicle communication service is a unicast service or group according to the indication information that is sent by the sending terminal to indicate the service type to which the vehicle communication service belongs, and the correspondence between the service type and the unicast service/multicast service. Broadcast business.
  • the step of transmitting the vehicle communication data by means of a single cell broadcast or a multi-cell broadcast according to a range in which the vehicle communication data needs to be broadcast specifically: according to the The vehicle communication data needs the range of the broadcast and the information of the neighboring cell, and determines the cell that needs to be broadcasted; if the number of cells that need to be broadcasted If the second predetermined number is less than or equal to, the vehicle communication data is selected to be transmitted by means of a single cell broadcast; if the number of cells that need to be broadcast is greater than the second predetermined number, then the method is selected to be transmitted by means of multi-cell broadcast.
  • the vehicle communication data according to the The vehicle communication data needs the range of the broadcast and the information of the neighboring cell, and determines the cell that needs to be broadcasted; if the number of cells that need to be broadcasted If the second predetermined number is less than or equal to, the vehicle communication data is selected to be transmitted by means of a single cell broadcast; if the number of cells that need to be broadcast is greater
  • the vehicle communication data is transmitted by means of single cell broadcast or multi-cell broadcast according to the number of cells that need to be broadcasted, so that the range of the broadcast can be reasonably determined, and the vehicle communication in the broadcast mode can be realized as much as possible. Efficient transmission of data and efficient use of resources.
  • the step of determining a range in which the vehicle communication data needs to be broadcasted specifically: receiving a service type to which the vehicle communication service corresponding to the vehicle communication data reported by the transmitting terminal belongs, according to The service type determines a range in which the vehicle communication data needs to be broadcasted; and/or receives location information reported by the receiving terminal, and determines a range in which the vehicle communication data needs to be broadcast according to the location information reported by the receiving terminal.
  • the base station or the network side device can be assisted by determining the range in which the vehicle communication data needs to be broadcast according to the received service type of the vehicle communication service reported by the transmitting terminal, and/or according to the location information reported by the receiving terminal.
  • the range in which the broadcast is required is quickly determined so that the base station or the network side device can reasonably select the broadcast transmission mechanism of the vehicle communication data, thereby achieving efficient transmission of the vehicle communication data and efficient use of resources in the broadcast mode as much as possible.
  • a data transmission apparatus for vehicle communication is further provided, which is applicable to a base station or a network side device, and includes: a first receiving unit, configured to receive vehicle communication data sent by the transmitting terminal; And determining, according to the number of receiving terminals that receive the vehicle communication data, or according to the indication information sent by the sending terminal, whether to transmit the vehicle communication data in a unicast manner or a broadcast manner; the first transmission unit is configured to When the determining unit determines that the vehicle communication data is transmitted by using the unicast mode, the vehicle communication data is directly transmitted to the receiving terminal by using the unicast mode; and the second transmission unit is configured to determine The unit determines, when the vehicle communication data is transmitted by using the broadcast mode, determines a range in which the vehicle communication data needs to be broadcast, and selects a manner of broadcasting by a single cell or a multi-cell broadcast according to a range in which the vehicle communication data needs to be broadcasted.
  • the vehicle communication data is transmitted in a manner.
  • the base station or the network side device by determining the number of receiving terminals that receive vehicle communication data, Whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data, so that the base station or the network side device can independently select the transmission mechanism of the vehicle communication data according to the number of the receiving terminals; and determine whether to select the unicast mode according to the indication information sent by the transmitting terminal.
  • the vehicle communication data is transmitted in a broadcast manner so that the base station or the network side device can select a transmission mechanism of the vehicle communication data according to the instruction of the terminal.
  • the base station or the network side device determines to transmit the vehicle communication data by broadcasting, it can select whether to pass the multi-cell broadcast (ie, eMBMS) or the single-cell broadcast (SC-PTM) according to the range in which the vehicle communication data needs to be broadcasted.
  • the vehicle communication data is transmitted, the support of the U2 interface-based V2V transmission mechanism is realized, and the V2V communication with high efficiency and saving transmission resources can be realized.
  • the determining unit includes: a first executing unit, configured to determine, when the number of the receiving terminals is less than or equal to a first predetermined number, to transmit the vehicle communication by using the unicast mode And determining, when the number of the receiving terminals is greater than the first predetermined number, determining to transmit the vehicle communication data by using the broadcast mode.
  • the vehicular communication data is transmitted in a unicast manner, so that when the number of receiving terminals is small, the manner of broadcasting is avoided to cause wireless transmission resources. Waste; and by transmitting the vehicle communication data in a broadcast manner when the number of receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
  • the determining unit includes: a first determining unit, configured to determine, according to the indication information sent by the sending terminal, whether the vehicle communication service corresponding to the vehicle communication data is a unicast service or a second execution unit, configured to: when the first determining unit determines that the vehicle communication service is the unicast service, determine to transmit the vehicle communication data by using the unicast mode, and use the When the first determining unit determines that the vehicle communication service is the multicast service, it is determined that the vehicle communication data is transmitted by using the broadcast mode.
  • the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirements of the vehicle communication service, so as to ensure efficient V2V communication that saves transmission resources.
  • the first determining unit is specifically configured to: And the indication information sent by the sending terminal to indicate that the vehicle communication service is a unicast service or a multicast service, and determining that the vehicle communication service is a unicast service or a multicast service; or
  • the vehicle communication service is a unicast service or group according to the indication information that is sent by the sending terminal to indicate the service type to which the vehicle communication service belongs, and the correspondence between the service type and the unicast service/multicast service. Broadcast business.
  • the second transmission unit includes: a second determining unit, configured to determine, according to the range of the vehicle communication data that needs to be broadcasted and the information of the neighboring cell, the cell that needs to be broadcasted; a selecting unit, configured to: when the number of cells that need to be broadcast is less than or equal to a second predetermined number, select to transmit the vehicle communication data by means of a single cell broadcast, and use the number of cells in the broadcast that needs to be broadcasted When the second predetermined number is greater, the vehicle communication data is selected to be transmitted by means of multi-cell broadcasting.
  • the vehicle communication data is transmitted by means of single cell broadcast or multi-cell broadcast according to the number of cells that need to be broadcasted, so that the range of the broadcast can be reasonably determined, and the vehicle communication in the broadcast mode can be realized as much as possible. Efficient transmission of data and efficient use of resources.
  • the second transmission unit includes: a second receiving unit, configured to receive a service type to which the vehicle communication service corresponding to the vehicle communication data reported by the transmitting terminal belongs; a determining unit, configured to determine, according to the type of service, a range in which the vehicle communication data needs to be broadcasted; and/or
  • the third receiving unit is configured to receive the location information reported by the receiving terminal
  • the fourth determining unit is configured to determine, according to the location information reported by the receiving terminal, a range in which the vehicle communication data needs to be broadcasted.
  • the base station or the network side device can be assisted by determining the range in which the vehicle communication data needs to be broadcast according to the received service type of the vehicle communication service reported by the transmitting terminal, and/or according to the location information reported by the receiving terminal.
  • the range in which the broadcast is required is quickly determined so that the base station or the network side device can reasonably select the broadcast transmission mechanism of the vehicle communication data, thereby achieving efficient transmission of the vehicle communication data and efficient use of resources in the broadcast mode as much as possible.
  • a base station comprising: any one of the above technologies A data transmission device for vehicle communication as described in the surgical scheme.
  • a network side device comprising: a data transmission device for vehicle communication as described in any one of the above aspects.
  • the support of the V2V transmission mechanism based on the Uu interface is realized, that is, the vehicle communication data can be reasonably selected to be transmitted through the unicast mode or the broadcast mode, and when the broadcast mode is selected, the manner of single cell broadcast can be further selected. It is also a multi-cell broadcast mode that achieves efficient transmission of vehicle communication data and efficient use of resources in a broadcast mode.
  • Figure 1 shows a schematic diagram of a scenario of V2V communication
  • FIG. 2 shows a schematic flow chart of a data transmission method for vehicle communication in accordance with one embodiment of the present invention
  • FIG. 3 shows a schematic block diagram of a data transmission device for vehicle communication in accordance with an embodiment of the present invention
  • Figure 4 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention
  • FIG. 5 shows a schematic block diagram of a network side device according to an embodiment of the present invention
  • FIG. 6 shows a schematic flow chart of a data transmission method for vehicle communication in accordance with another embodiment of the present invention.
  • FIG. 2 shows a schematic flow chart of a data transmission method for vehicle communication in accordance with one embodiment of the present invention.
  • a data transmission method for vehicle communication is applicable to a base station or a network side device, and includes:
  • Step 202 Receive vehicle communication data sent by the sending terminal.
  • Step 204 Determine, according to the number of receiving terminals that receive the vehicle communication data, or according to the indication information sent by the sending terminal, whether to transmit the vehicle communication data by using a unicast mode or a broadcast mode;
  • Step 206 when it is determined that the vehicle communication data is transmitted by using the unicast mode, the vehicle communication data is directly transmitted to the receiving terminal by using the unicast mode;
  • Step 208 When it is determined that the vehicle communication data is transmitted by using the broadcast mode, determine a range in which the vehicle communication data needs to be broadcast, and select a mode to broadcast through a single cell according to a range in which the vehicle communication data needs to be broadcasted.
  • the vehicle communication data is transmitted in a manner of cell broadcasting.
  • the base station or the network side device can independently select the transmission of the vehicle communication data according to the number of the receiving terminals.
  • the mechanism determines whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the indication information sent by the transmitting terminal, so that the base station or the network side device can select the transmission mechanism of the vehicle communication data according to the indication of the terminal.
  • the base station or the network side device determines to transmit the vehicle communication data by broadcasting, it can select whether to pass the multi-cell broadcast (ie, eMBMS) or the single-cell broadcast (SC-PTM) according to the range in which the vehicle communication data needs to be broadcasted.
  • the vehicle communication data is transmitted, the support of the U2 interface-based V2V transmission mechanism is realized, and the V2V communication with high efficiency and saving transmission resources can be realized.
  • the step of determining whether to transmit the vehicle communication data by using a unicast mode or a broadcast mode according to the number of receiving terminals that receive the vehicle communication data includes: the number of the receiving terminals is smaller than Or equal to the first predetermined number, determining to transmit the vehicle communication data by using the unicast mode; and determining to transmit the vehicle communication by using the broadcast mode when the number of the receiving terminals is greater than the first predetermined number data.
  • the vehicle communication data when the number of receiving terminals is less than or equal to the first predetermined number, the vehicle communication data is transmitted in a unicast manner, so that the number of receiving terminals can be small.
  • the wireless transmission resource is wasted; and when the number of the receiving terminals is greater than the first predetermined number, the vehicle communication data is transmitted by means of broadcasting, so that efficient V2V communication can be ensured.
  • the step of determining whether to transmit the vehicle communication data by using a unicast mode or a broadcast mode, according to the indication information sent by the sending terminal specifically includes: according to the indication information sent by the sending terminal. Determining whether the vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service; and determining that the vehicle communication service is the unicast service, determining to transmit the vehicle communication data by using the unicast mode; When it is determined that the vehicle communication service is the multicast service, it is determined that the vehicle communication data is transmitted by using the broadcast mode.
  • the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirements of the vehicle communication service, so as to ensure efficient V2V communication that saves transmission resources.
  • the step of determining whether the vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service, according to the indication information sent by the sending terminal specifically includes:
  • the vehicle communication service is a unicast service or group according to the indication information that is sent by the sending terminal to indicate the service type to which the vehicle communication service belongs, and the correspondence between the service type and the unicast service/multicast service. Broadcast business.
  • the step of transmitting the vehicle communication data by means of a single cell broadcast or a multi-cell broadcast according to a range in which the vehicle communication data needs to be broadcast specifically: according to the The vehicle communication data needs to broadcast the range and the information of the neighboring cell to determine the cell that needs to be broadcasted; if the number of the cells that need to be broadcast is less than or equal to the second predetermined number, then the method is selected to be transmitted by means of a single cell broadcast. Vehicle communication data; if the number of cells that need to be broadcast is greater than the second predetermined number, then selecting to transmit the vehicle communication data by means of multi-cell broadcast.
  • the number of cells that are broadcasted according to need is selected by a single small
  • the vehicle communication data is transmitted in the manner of a zone broadcast or a multi-cell broadcast, so that the range of the broadcast can be reasonably determined, and efficient transmission of the vehicle communication data and efficient use of resources in the broadcast mode can be realized as much as possible.
  • the step of determining a range in which the vehicle communication data needs to be broadcasted specifically: receiving a service type to which the vehicle communication service corresponding to the vehicle communication data reported by the transmitting terminal belongs, according to The service type determines a range in which the vehicle communication data needs to be broadcasted; and/or receives location information reported by the receiving terminal, and determines a range in which the vehicle communication data needs to be broadcast according to the location information reported by the receiving terminal.
  • the base station or the network side device can be assisted by determining the range in which the vehicle communication data needs to be broadcast according to the received service type of the vehicle communication service reported by the transmitting terminal, and/or according to the location information reported by the receiving terminal.
  • the range in which the broadcast is required is quickly determined so that the base station or the network side device can reasonably select the broadcast transmission mechanism of the vehicle communication data, thereby achieving efficient transmission of the vehicle communication data and efficient use of resources in the broadcast mode as much as possible.
  • FIG. 3 shows a schematic block diagram of a data transmission device for vehicle communication in accordance with an embodiment of the present invention.
  • a data transmission apparatus 300 for vehicle communication is applicable to a base station or a network side device, and includes: a first receiving unit 302, a determining unit 304, a first transmitting unit 306, and a Two transmission unit 308.
  • the first receiving unit 302 is configured to receive vehicle communication data sent by the sending terminal.
  • the determining unit 304 is configured to determine, according to the number of receiving terminals that receive the vehicle communication data, or according to the indication information sent by the sending terminal, whether to transmit the vehicle communication data in a unicast manner or a broadcast manner;
  • the first transmission unit 306 is configured to directly transmit the vehicle communication data to the receiving terminal by using the unicast mode when the determining unit 304 determines that the vehicle communication data is transmitted by using the unicast mode;
  • a second transmission unit 308, configured to determine, when the determining unit 304 transmits the vehicle communication data by using the broadcast mode, a range in which the vehicle communication data needs to be broadcast, and a range that needs to be broadcast according to the vehicle communication data. , choose how to broadcast through a single cell or how small The vehicle communication data is transmitted by means of a zone broadcast.
  • the base station or the network side device can independently select the transmission of the vehicle communication data according to the number of the receiving terminals.
  • the mechanism determines whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the indication information sent by the transmitting terminal, so that the base station or the network side device can select the transmission mechanism of the vehicle communication data according to the indication of the terminal.
  • the base station or the network side device determines to transmit the vehicle communication data by broadcasting, it can select whether to pass the multi-cell broadcast (ie, eMBMS) or the single-cell broadcast (SC-PTM) according to the range in which the vehicle communication data needs to be broadcasted.
  • the vehicle communication data is transmitted, the support of the U2 interface-based V2V transmission mechanism is realized, and the V2V communication with high efficiency and saving transmission resources can be realized.
  • the determining unit 304 includes: a first executing unit 3042, configured to: when the number of the receiving terminals is less than or equal to a first predetermined number, determine to transmit by using the unicast mode Vehicle communication data, and configured to transmit the vehicle communication data by using the broadcast mode when the number of the receiving terminals is greater than the first predetermined number.
  • the vehicular communication data is transmitted in a unicast manner, so that when the number of receiving terminals is small, the manner of broadcasting is avoided to cause wireless transmission resources. Waste; and by transmitting the vehicle communication data in a broadcast manner when the number of receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
  • the determining unit 304 includes: a first determining unit 3044, configured to determine, according to the indication information sent by the sending terminal, that the vehicle communication service corresponding to the vehicle communication data is unicast The service is also a multicast service; the second executing unit 3046 is configured to determine, when the first determining unit 3044 determines that the vehicle communication service is the unicast service, to transmit the vehicle communication data by using the unicast mode, And when the first determining unit 3044 determines that the vehicle communication service is the multicast service, determining to transmit the vehicle communication data by using the broadcast mode.
  • the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirements of the vehicle communication service, so as to ensure an efficient and resource-saving V2V communication. letter.
  • the first determining unit 3044 is specifically configured to: determine, according to the indication information that is sent by the sending terminal to indicate that the vehicle communication service is a unicast service or a multicast service, The vehicle communication service is a unicast service or a multicast service; or
  • the vehicle communication service is a unicast service or group according to the indication information that is sent by the sending terminal to indicate the service type to which the vehicle communication service belongs, and the correspondence between the service type and the unicast service/multicast service. Broadcast business.
  • the second transmission unit 308 includes: a second determining unit 308A, configured to determine, according to the range of the vehicle communication data that needs to be broadcasted and the information of the neighboring cell, that the broadcast needs to be performed.
  • a selecting unit 308B configured to: when the number of cells that need to be broadcast is less than or equal to a second predetermined number, select to transmit the vehicle communication data by means of a single cell broadcast, and to be used in the broadcast that needs to be broadcasted. When the number of cells is greater than the second predetermined number, the vehicle communication data is selected to be transmitted by means of multi-cell broadcast.
  • the vehicle communication data is transmitted by means of single cell broadcast or multi-cell broadcast according to the number of cells that need to be broadcasted, so that the range of the broadcast can be reasonably determined, and the vehicle communication in the broadcast mode can be realized as much as possible. Efficient transmission of data and efficient use of resources.
  • the second transmission unit 308 includes: a second receiving unit 308C, configured to receive a service type to which the vehicle communication service corresponding to the vehicle communication data reported by the sending terminal belongs; a third determining unit 308D, configured to determine, according to the service type, a range in which the vehicle communication data needs to be broadcasted; and/or
  • the third receiving unit 308E is configured to receive the location information reported by the receiving terminal
  • the fourth determining unit 308F is configured to determine, according to the location information reported by the receiving terminal, a range in which the vehicle communication data needs to be broadcasted.
  • the base station or the network side device can be assisted by determining the range in which the vehicle communication data needs to be broadcast according to the received service type of the vehicle communication service reported by the transmitting terminal, and/or according to the location information reported by the receiving terminal. Quickly determine the range that needs to be broadcast, so that the base station or the network side device can reasonably select the broadcast transmission of the vehicle communication data.
  • the mechanism is to achieve as high a efficient transmission of vehicle communication data as possible and efficient use of resources in a broadcast mode.
  • Figure 4 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • a base station 400 includes a data transmission device 300 for vehicle communication as shown in FIG.
  • FIG. 5 shows a schematic block diagram of a network side device in accordance with an embodiment of the present invention.
  • a network side device 500 includes a data transmission device 300 for vehicle communication as shown in FIG.
  • the network side device may be an MME (Mobility Management Entity), an MCE (Multi-Service CE), or the like.
  • MME Mobility Management Entity
  • MCE Multi-Service CE
  • the technical solution of the present invention mainly proposes that the base station or the network side device selects to transmit the vehicle communication data by using a unicast mode or a broadcast mode (including single cell broadcast and multi-cell broadcast) according to service requirements, and the following is respectively for the base station and the network side device. Be explained.
  • Embodiment 1 A scheme for implementing a communication mechanism for selecting vehicle communication data by a base station:
  • a base station device supporting V2V communication can acquire some topology related information in advance.
  • the base station needs to be able to have certain self-coverage information (not required to be accurate to the meter level) and neighbor cell topological relationship information and vehicle travel area information (as in the scenario shown in FIG. 1, the vehicle is along the established When the route runs, the base station needs to know the route information).
  • certain self-coverage information not required to be accurate to the meter level
  • neighbor cell topological relationship information and vehicle travel area information as in the scenario shown in FIG. 1, the vehicle is along the established When the route runs, the base station needs to know the route information).
  • Such information enables the base station to be more intelligent in selecting the mode of propagation.
  • the terminal When the terminal sends the V2V data to the base station, the terminal needs to indicate to the base station whether the service associated with the data is a unicast service or a multicast service.
  • the indication may be indicated in the user plane data or in the control signaling.
  • the terminal may directly indicate to the base station whether the service is a unicast service or a multicast service; or may indicate the service type to the base station, and the base station may determine the mapping between the service type configured in the base station and the unicast/multicast.
  • the base station After receiving the data sent by the terminal and discriminating the unicast service or the multicast service type, the base station directly sends the downlink data if it is unicast. If it is a multicast service, the broadcast type judgment is performed, specifically:
  • the base station determines the range that the V2V message needs to cover according to the service type, and determines which cells need to be broadcast according to the neighbor cell information.
  • the V2V message can be transmitted in several cells through the X2 interface between the base stations.
  • the serving base station can more accurately determine the broadcast cell range.
  • the identification information of the group is acquired by the RSU (Road Side Unit) or the base station, and the information can be exchanged between the RSUs or between the base stations. Therefore, the broadcast range can be determined more quickly when the V2V message is broadcasted downstream.
  • the receiving terminal that needs to obtain the group service data may also report its location (especially the connected terminal) to the RSU or the base station, thereby assisting the base station to quickly determine the broadcast cell.
  • Embodiment 2 A scheme for implementing a communication mechanism for selecting vehicle communication data by a network side device:
  • the terminal When the terminal sends the V2V data to the network side device, the terminal needs to indicate to the network side device whether the service associated with the data is a unicast service or a multicast service. It should be noted that the indication may be indicated in the user plane data, and the user plane data may need to reach the network side device first, and then sent by the network side device to the relevant base station according to the range of the involved cell.
  • the network side device After receiving the data sent by the terminal and discriminating the unicast service or the multicast service type, the network side device directly sends the downlink data if it is unicast. If it is a multicast service, the broadcast type judgment is performed, specifically:
  • the network side device discriminates the range that the V2V message needs to cover according to the service type, and determines which cells need to be broadcast according to the neighbor cell information.
  • the range that needs to be broadcast can be covered by one base station or a small number of base stations, a single cell broadcast mechanism is performed; if the range of the broadcast is required, multiple bases are required. If the station is covered, a multi-cell broadcast mechanism is performed.
  • the V2V message can be transmitted in several cells through the X2 interface between the base stations.
  • the network side device can also determine the broadcast cell range more accurately.
  • the scheme of the first embodiment described above i.e., the scheme for implementing the propagation mechanism for selecting vehicle communication data by the base station
  • the scheme of the first embodiment described above needs to change the architecture of the eMBMS and the SC-PTM so that the base station supports these functions.
  • the advantage of this is that it can help to shorten the transmission delay of V2V, because it needs to introduce additional forwarding delay through the network side device, and the typical value of this extra delay is at least 20ms.
  • a data transmission method for vehicle communication includes:
  • service data (such as vehicle communication service data) arrives at the base station or the network side device.
  • Step 604 Determine whether the service data is transmitted by using a unicast mode or a broadcast mode.
  • Step 606 When it is determined that the service data is transmitted by using the unicast mode, the base station or the network side device copies multiple pieces of data and sends the data to a specific UE (User Equipment).
  • UE User Equipment
  • Step 608 When it is determined that the service data is transmitted by broadcasting, it is determined whether the transmission is performed by a single cell broadcast or a multi-cell broadcast.
  • Step 610 When it is determined that the transmission is performed by using a single cell, the cell that needs to be transmitted is determined according to the distribution range of the communication peer, and then the single cell broadcast is performed.
  • Step 612 Perform multi-cell broadcast when it is determined that the transmission is by way of multi-cell.
  • the base station or the network side device selects to transmit the vehicle communication data by means of unicast, single cell broadcast or multi-cell broadcast according to the indication of the terminal.
  • the base station or the network side device can also determine the transmitter of the vehicle communication data autonomously according to the number of receiving terminals. system.
  • the technical solution of the foregoing embodiment of the present invention enables the V2V downlink transmission based on the Uu interface to select a unicast or broadcast/multicast mode according to service requirements. If the broadcast mode is adopted, the broadcast range can be reasonably determined, and the V2V message in the broadcast mode can be implemented as much as possible. Efficient transmission and efficient use of resources.
  • the present invention proposes a new data transmission scheme for vehicle communication, which realizes support for the U2 interface-based V2V transmission mechanism, that is, can be reasonably selected through unicast.
  • the vehicle communication data is transmitted in a mode or a broadcast manner, and when the broadcast mode is selected, whether the single cell broadcast mode or the multi-cell broadcast mode can be further selected, the high efficiency transmission of the vehicle communication data and the high resource efficiency in the broadcast mode are realized. use.

Abstract

本发明提供了一种用于车辆通信的数据传输方法及装置、基站和网络侧设备，其中，用于车辆通信的数据传输方法包括：接收发送终端发送的车辆通信数据；根据接收车辆通信数据的接收终端的数量，或根据发送终端发送的指示信息，判断采用单播方式还是广播方式传输车辆通信数据；在判定采用单播方式传输车辆通信数据时，将车辆通信数据通过单播方式直接传输至接收终端；在判定采用广播方式传输车辆通信数据时，确定车辆通信数据需要广播的范围，并根据车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输车辆通信数据。本发明的技术方案实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。

Description

用于车辆通信的数据传输方法及装置、基站和网络侧设备 技术领域
本发明涉及通信技术领域，具体而言，涉及一种用于车辆通信的数据传输方法、一种用于车辆通信的数据传输装置、一种基站和一种网络侧设备。
背景技术
V2X(Vehicle to X，车到特定目标通信)是3GPP RAN#68批准设立的项目，主要研究基于3GPP通信协议的车辆数据传输方案。V2X包括了V2V(Vehicle to Vehicle，车到车通信)、V2P(Vehicle to Individual Person，车到人通信)、V2I(Vehicle to Infrastructure，车到路通信)等。V2V通信从原理上来说，可以通过Uu接口(用户设备与基站之间的接口)和PC5接口(用户设备与用户设备之间的接口)来进行，3GPP目前正在研究讨论两种机制。现有的下行传输机制包括Uu接口单播，Uu接口eMBMS(Enhanced Multimedia Broadcast Multicast Service，多媒体广播多播业务)，即多小区的广播业务支持，以及单小区广播机制，即Single-Cell PTM(Point to Multi-point)。
但是，现有的机制还不能完全支持基于Uu接口的V2V传输。具体来说，由于V2V业务的需求，数据传输可能是一对一的，也可能是一对多的。如图1所示，若车辆108产生一个V2V数据，可能需要发给车辆110、车辆112、车辆114、车辆116、车辆118中的一个或者多个，这些接收的车辆可能位于基站102覆盖的小区，即同发送的车辆108属于同一个服务小区，也可能位于其他小区之下。可见，基于Uu接口的传输机制需要判别是采用Uu接口单播机制还是采用eMBMS或者SC-PTM机制，而现有技术中尚未实现如何根据接收终端的分布和小区结构来选择传输机制的方案。
因此，如何能够实现对V2V业务的传输机制的选择，以实现高效的、节省传输资源的V2V通信成为亟待解决的技术问题。
发明内容
本发明正是基于上述技术问题至少之一，提出了一种新的用于车辆通信的数据传输方案，实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。
有鉴于此，根据本发明的第一方面，提出了一种用于车辆通信的数据传输方法，适用于基站或网络侧设备，包括：接收发送终端发送的车辆通信数据；根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；在判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；在判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据接收车辆通信数据的接收终端的数量，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据接收终端的数量自主选择车辆通信数据的传输机制；而通过根据发送终端发送的指示信息，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据终端的指示来选择车辆通信数据的传输机制。同时，基站或网络侧设备在判定采用广播方式传输车辆通信数据时，能够根据车辆通信数据需要广播的范围选择通过单小区广播(即SC-PTM)的方式还是多小区广播(eMBMS)的方式来传输车辆通信数据，实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。
在上述技术方案中，优选地，根据接收所述车辆通信数据的接收终端的数量，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：在所述接收终端的数量小于或等于第一预定数量时，判定采用 所述单播方式传输所述车辆通信数据；以及在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，通过在接收终端的数量小于或等于第一预定数量时，采用单播方式传输车辆通信数据，使得可以在接收终端的数量较小时，避免采用广播的方式而导致无线传输资源的浪费；而通过在接收终端的数量大于第一预定数量时，采用广播的方式传输车辆通信数据，可以保证实现高效的V2V通信。
在上述任一技术方案中，优选地，根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；在确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据；在确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，可以根据车辆通信业务的需求选择单播方式或广播方式传输车辆通信数据，以确保实现高效的、节省传输资源的V2V通信。
在上述任一技术方案中，优选地，根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务的步骤，具体包括：
根据所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
在上述任一技术方案中，优选地，根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据的步骤，具体包括：根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；若所述需要进行广播的小区的数量 小于或等于第二预定数量，则选择通过单小区广播的方式传输所述车辆通信数据；若所述需要进行广播的小区的数量大于所述第二预定数量，则选择通过多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据需要进行广播的小区的数量选择通过单小区广播的方式或多小区广播的方式传输车辆通信数据，使得能够合理确定广播的范围，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
在上述任一技术方案中，优选地，确定所述车辆通信数据需要广播的范围的步骤，具体包括：接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型，根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或接收所述接收终端上报的位置信息，根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
在该技术方案中，通过根据接收到的发送终端上报的车辆通信业务的业务类型，和/或根据接收终端上报的位置信息来确定车辆通信数据需要广播的范围，使得能够辅助基站或网络侧设备快速地确定需要广播的范围，以便于基站或网络侧设备合理地选择车辆通信数据的进行广播的传输机制，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
根据本发明的第二方面，还提出了一种用于车辆通信的数据传输装置，适用于基站或网络侧设备，包括：第一接收单元，用于接收发送终端发送的车辆通信数据；判断单元，用于根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；第一传输单元，用于在所述判断单元判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；第二传输单元，用于在所述判断单元判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据接收车辆通信数据的接收终端的数量，判 断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据接收终端的数量自主选择车辆通信数据的传输机制；而通过根据发送终端发送的指示信息，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据终端的指示来选择车辆通信数据的传输机制。同时，基站或网络侧设备在判定采用广播方式传输车辆通信数据时，能够根据车辆通信数据需要广播的范围选择通过多小区广播(即eMBMS)的方式还是单小区广播(SC-PTM)的方式来传输车辆通信数据，实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。
在上述技术方案中，优选地，所述判断单元包括：第一执行单元，用于在所述接收终端的数量小于或等于第一预定数量时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，通过在接收终端的数量小于或等于第一预定数量时，采用单播方式传输车辆通信数据，使得可以在接收终端的数量较小时，避免采用广播的方式而导致无线传输资源的浪费；而通过在接收终端的数量大于第一预定数量时，采用广播的方式传输车辆通信数据，可以保证实现高效的V2V通信。
在上述任一技术方案中，优选地，所述判断单元包括：第一确定单元，用于根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；第二执行单元，用于在所述第一确定单元确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述第一确定单元确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，可以根据车辆通信业务的需求选择单播方式或广播方式传输车辆通信数据，以确保实现高效的、节省传输资源的V2V通信。
在上述任一技术方案中，优选地，所述第一确定单元具体用于：根据 所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
在上述任一技术方案中，优选地，所述第二传输单元包括：第二确定单元，用于根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；选择单元，用于在所述需要进行广播的小区的数量小于或等于第二预定数量时，选择通过单小区广播的方式传输所述车辆通信数据，并用于在所述需要进行广播的小区的数量大于所述第二预定数量时，选择通过多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据需要进行广播的小区的数量选择通过单小区广播的方式或多小区广播的方式传输车辆通信数据，使得能够合理确定广播的范围，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
在上述任一技术方案中，优选地，所述第二传输单元包括：第二接收单元，用于接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型；第三确定单元，用于根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或
第三接收单元，用于接收所述接收终端上报的位置信息；第四确定单元，用于根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
在该技术方案中，通过根据接收到的发送终端上报的车辆通信业务的业务类型，和/或根据接收终端上报的位置信息来确定车辆通信数据需要广播的范围，使得能够辅助基站或网络侧设备快速地确定需要广播的范围，以便于基站或网络侧设备合理地选择车辆通信数据的进行广播的传输机制，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
根据本发明的第三方面，还提出了一种基站，包括：如上述任一项技 术方案中所述的用于车辆通信的数据传输装置。
根据本发明的第四方面，还提出了一种网络侧设备，包括：如上述任一项技术方案中所述的用于车辆通信的数据传输装置。
通过以上技术方案，实现了对基于Uu接口的V2V传输机制的支持，即能够合理选择通过单播方式或广播方式传输车辆通信数据，并且在选择广播方式时，能够进一步选择是单小区广播的方式还是多小区广播的方式，实现了在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
附图说明
图1示出了V2V通信的场景示意图；
图2示出了根据本发明的一个实施例的用于车辆通信的数据传输方法的示意流程图；
图3示出了根据本发明的实施例的用于车辆通信的数据传输装置的示意框图；
图4示出了根据本发明的实施例的基站的示意框图；
图5示出了根据本发明的实施例的网络侧设备的示意框图；
图6示出了根据本发明的另一个实施例的用于车辆通信的数据传输方法的示意流程图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图2示出了根据本发明的一个实施例的用于车辆通信的数据传输方法的示意流程图。
如图2所示，根据本发明的一个实施例的用于车辆通信的数据传输方法，适用于基站或网络侧设备，包括：
步骤202，接收发送终端发送的车辆通信数据；
步骤204，根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；
步骤206，在判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；
步骤208，在判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据接收车辆通信数据的接收终端的数量，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据接收终端的数量自主选择车辆通信数据的传输机制；而通过根据发送终端发送的指示信息，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据终端的指示来选择车辆通信数据的传输机制。同时，基站或网络侧设备在判定采用广播方式传输车辆通信数据时，能够根据车辆通信数据需要广播的范围选择通过多小区广播(即eMBMS)的方式还是单小区广播(SC-PTM)的方式来传输车辆通信数据，实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。
在上述技术方案中，优选地，根据接收所述车辆通信数据的接收终端的数量，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：在所述接收终端的数量小于或等于第一预定数量时，判定采用所述单播方式传输所述车辆通信数据；以及在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，通过在接收终端的数量小于或等于第一预定数量时，采用单播方式传输车辆通信数据，使得可以在接收终端的数量较小 时，避免采用广播的方式而导致无线传输资源的浪费；而通过在接收终端的数量大于第一预定数量时，采用广播的方式传输车辆通信数据，可以保证实现高效的V2V通信。
在上述任一技术方案中，优选地，根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；在确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据；在确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，可以根据车辆通信业务的需求选择单播方式或广播方式传输车辆通信数据，以确保实现高效的、节省传输资源的V2V通信。
在上述任一技术方案中，优选地，根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务的步骤，具体包括：
根据所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
在上述任一技术方案中，优选地，根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据的步骤，具体包括：根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；若所述需要进行广播的小区的数量小于或等于第二预定数量，则选择通过单小区广播的方式传输所述车辆通信数据；若所述需要进行广播的小区的数量大于所述第二预定数量，则选择通过多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据需要进行广播的小区的数量选择通过单小 区广播的方式或多小区广播的方式传输车辆通信数据，使得能够合理确定广播的范围，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
在上述任一技术方案中，优选地，确定所述车辆通信数据需要广播的范围的步骤，具体包括：接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型，根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或接收所述接收终端上报的位置信息，根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
在该技术方案中，通过根据接收到的发送终端上报的车辆通信业务的业务类型，和/或根据接收终端上报的位置信息来确定车辆通信数据需要广播的范围，使得能够辅助基站或网络侧设备快速地确定需要广播的范围，以便于基站或网络侧设备合理地选择车辆通信数据的进行广播的传输机制，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
图3示出了根据本发明的实施例的用于车辆通信的数据传输装置的示意框图。
如图3所示，根据本发明的实施例的用于车辆通信的数据传输装置300，适用于基站或网络侧设备，包括：第一接收单元302、判断单元304、第一传输单元306和第二传输单元308。
其中，第一接收单元302，用于接收发送终端发送的车辆通信数据；
判断单元304，用于根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；
第一传输单元306，用于在所述判断单元304判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；
第二传输单元308，用于在所述判断单元304判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小 区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据接收车辆通信数据的接收终端的数量，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据接收终端的数量自主选择车辆通信数据的传输机制；而通过根据发送终端发送的指示信息，判断选择单播方式还是广播方式传输车辆通信数据，使得基站或网络侧设备能够根据终端的指示来选择车辆通信数据的传输机制。同时，基站或网络侧设备在判定采用广播方式传输车辆通信数据时，能够根据车辆通信数据需要广播的范围选择通过多小区广播(即eMBMS)的方式还是单小区广播(SC-PTM)的方式来传输车辆通信数据，实现了对基于Uu接口的V2V传输机制的支持，并且能够实现高效的、节省传输资源的V2V通信。
在上述技术方案中，优选地，所述判断单元304包括：第一执行单元3042，用于在所述接收终端的数量小于或等于第一预定数量时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，通过在接收终端的数量小于或等于第一预定数量时，采用单播方式传输车辆通信数据，使得可以在接收终端的数量较小时，避免采用广播的方式而导致无线传输资源的浪费；而通过在接收终端的数量大于第一预定数量时，采用广播的方式传输车辆通信数据，可以保证实现高效的V2V通信。
在上述任一技术方案中，优选地，所述判断单元304包括：第一确定单元3044，用于根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；第二执行单元3046，用于在所述第一确定单元3044确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述第一确定单元3044确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
在该技术方案中，可以根据车辆通信业务的需求选择单播方式或广播方式传输车辆通信数据，以确保实现高效的、节省传输资源的V2V通 信。
在上述任一技术方案中，优选地，所述第一确定单元3044具体用于：根据所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
在上述任一技术方案中，优选地，所述第二传输单元308包括：第二确定单元308A，用于根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；选择单元308B，用于在所述需要进行广播的小区的数量小于或等于第二预定数量时，选择通过单小区广播的方式传输所述车辆通信数据，并用于在所述需要进行广播的小区的数量大于所述第二预定数量时，选择通过多小区广播的方式传输所述车辆通信数据。
在该技术方案中，通过根据需要进行广播的小区的数量选择通过单小区广播的方式或多小区广播的方式传输车辆通信数据，使得能够合理确定广播的范围，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
在上述任一技术方案中，优选地，所述第二传输单元308包括：第二接收单元308C，用于接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型；第三确定单元308D，用于根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或
第三接收单元308E，用于接收所述接收终端上报的位置信息；第四确定单元308F，用于根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
在该技术方案中，通过根据接收到的发送终端上报的车辆通信业务的业务类型，和/或根据接收终端上报的位置信息来确定车辆通信数据需要广播的范围，使得能够辅助基站或网络侧设备快速地确定需要广播的范围，以便于基站或网络侧设备合理地选择车辆通信数据的进行广播的传输 机制，尽可能实现在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
图4示出了根据本发明的实施例的基站的示意框图。
如图4所示，根据本发明的实施例的基站400，包括：如图3中所示的用于车辆通信的数据传输装置300。
图5示出了根据本发明的实施例的网络侧设备的示意框图。
如图5所示，根据本发明的实施例的网络侧设备500，包括：如图3中所示的用于车辆通信的数据传输装置300。其中，网络侧设备可以是MME(Mobility Management Entity，移动性管理实体)、MCE(Multi-Service CE)等。
本发明的技术方案主要是提出了由基站或网络侧设备根据业务需要选择通过单播方式或广播方式(包括单小区广播和多小区广播)来传输车辆通信数据，以下针对基站和网络侧设备分别进行说明。
实施例一：由基站实现选择车辆通信数据的传播机制的方案：
从实现的角度，假设支持V2V通信的基站设备能够预先获取一些拓扑相关的信息。具体来说，基站需要能够具备一定的自身覆盖范围信息(不要求精确到米级)和相邻小区拓扑关系信息以及车辆行驶区域信息(如在图1所示的场景中，车辆沿着既定的路线行驶，基站需要获知该路线信息)。这样的信息使得基站在选择传播方式时能够更加智能。
具体方案如下：
1、在终端向基站发送V2V数据时，终端需要向基站指示该数据所关联的业务是单播业务还是组播业务。该指示可以在用户面数据中指示，也可以在控制信令中指示。
具体地，终端可以直接向基站指示业务是单播业务还是组播业务；也可以向基站指示业务类型，那么基站可以通过在基站中配置的业务类型与单播/组播的映射关系来确定。
2、基站收到终端发送的数据并判别了单播业务或者组播业务类型后，如果是单播，则直接发送下行数据。如果是组播业务，则执行广播类型的判断，具体地：
基站根据业务类型判别V2V消息需要覆盖的范围，并根据相邻小区信息判断哪些小区需要进行广播。
具体来说，如果需要广播的范围能够被一个基站覆盖或者数目较少的基站覆盖，则进行单小区广播机制；如果需要广播的范围需要被多个的基站覆盖，则进行多小区广播机制。其中，V2V消息可以通过基站之间的X2接口在几个小区中进行传输。
特别的，如果发送终端提供的业务类型信息能够帮助基站推演出潜在的接收终端群组信息甚至是接收终端信息，则服务基站可以更加精确地确定广播的小区范围。
举例来说，如果一个V2V消息需要发给一个编组行驶的车辆，假定该编组的标识信息被RSU(Road Side Unit，路侧单元)或者基站获取，在RSU之间或者基站之间可以交互该信息，从而在V2V消息下行广播时可以更快地确定广播范围。
可选地，需要获取群组业务数据的接收终端也可以向RSU或者基站汇报其位置(尤其是连接态的终端)，从而辅助基站快速确定广播小区。
实施例二：由网络侧设备实现选择车辆通信数据的传播机制的方案：
从实现的角度，假设支持V2V通信的网络侧设备能够预先获取一些拓扑相关的信息。具体方案如下：
1、在终端向网络侧设备发送V2V数据时，终端需要向网络侧设备指示该数据所关联的业务是单播业务还是组播业务。需要注意的是，该指示可以在用户面数据中指示，用户面数据可能需要先到达网络侧设备，然后由网络侧设备根据所涉及的小区的范围向相关的基站发送。
2、网络侧设备在收到终端发送的数据并判别了单播业务或者组播业务类型后，如果是单播，则直接发送下行数据。如果是组播业务，则执行广播类型的判断，具体地：
网络侧设备根据业务类型判别V2V消息需要覆盖的范围，并根据相邻小区信息判断哪些小区需要进行广播。
具体来说，如果需要广播的范围能够被一个基站覆盖或者数目较少的基站覆盖，则进行单小区广播机制；如果需要广播的范围需要被多个的基 站覆盖，则进行多小区广播机制。其中，V2V消息可以通过基站之间的X2接口在几个小区中进行传输。
特别的，如果发送终端提供的业务类型信息能够帮助网络侧设备推演出潜在的接收终端群组信息甚至是接收终端信息，则网络侧设备也可以更加精确地确定广播的小区范围。
需要注意的是，按照现有的eMBMS和SC-PTM架构，用户面数据如果经过网络侧设备，则基站的实现可以大大简化，即不用保存和复制用户数据，不需要维护每个数据包需要向哪些基站转发。因此，上述实施例一的方案(即由基站实现选择车辆通信数据的传播机制的方案)需要改变eMBMS和SC-PTM的架构，使得基站来支持这些功能。这样的好处是，能够有助于缩短V2V的传输延迟，因为经过网络侧设备的话需要引入额外的转发延迟，这个额外延迟的典型的数值至少在20ms以上。
以上过程参照图6所示。
如图6所示，根据本发明的另一个实施例的用于车辆通信的数据传输方法，包括：
步骤602，业务数据(如车辆通信业务数据)到达基站或网络侧设备。
步骤604，确定是通过单播方式还是广播方式传输业务数据。
步骤606，在确定是通过单播方式传输业务数据时，基站或网络侧设备复制多份数据发送给特定的UE(User Equipment，用户设备)。
步骤608，在确定是通过广播方式传输业务数据时，确定是通过单小区广播的方式还是通过多小区广播的方式进行传输。
步骤610，在确定是通过单小区的方式进行传输时，根据通信对端的分布范围确定需要传播的小区，然后进行单小区广播。
步骤612，在确定是通过多小区的方式进行传输时，执行多小区广播。
上述实施例的技术方案为基站或网络侧设备根据终端的指示来选择通过单播、单小区广播或多小区广播的方式传输车辆通信数据。当然，基站或网络侧设备也可以根据接收终端的数量自主确定车辆通信数据的传输机 制。
本发明上述实施例的技术方案使得基于Uu接口的V2V下行传输能够根据业务需求选择单播或者广播/多播方式，如果采用广播方式，能够合理地确定广播范围，尽可能实现广播方式下V2V消息的高效率传输和资源的高效率利用。
以上结合附图详细说明了本发明的技术方案，本发明提出了一种新的用于车辆通信的数据传输方案，实现了对基于Uu接口的V2V传输机制的支持，即能够合理选择通过单播方式或广播方式传输车辆通信数据，并且在选择广播方式时，能够进一步选择是单小区广播的方式还是多小区广播的方式，实现了在广播方式下车辆通信数据的高效率传输和资源的高效率利用。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (14)

  1. 一种用于车辆通信的数据传输方法，适用于基站或网络侧设备，其特征在于，包括：
    接收发送终端发送的车辆通信数据；
    根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；
    在判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；
    在判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据。
  2. 根据权利要求1所述的用于车辆通信的数据传输方法，其特征在于，根据接收所述车辆通信数据的接收终端的数量，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：
    在所述接收终端的数量小于或等于第一预定数量时，判定采用所述单播方式传输所述车辆通信数据；以及
    在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
  3. 根据权利要求1所述的用于车辆通信的数据传输方法，其特征在于，根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据的步骤，具体包括：
    根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；
    在确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据；
    在确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
  4. 根据权利要求3所述的用于车辆通信的数据传输方法，其特征在于，根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务的步骤，具体包括：
    根据所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
    根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
  5. 根据权利要求1至4中任一项所述的用于车辆通信的数据传输方法，其特征在于，根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据的步骤，具体包括：
    根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；
    若所述需要进行广播的小区的数量小于或等于第二预定数量，则选择通过单小区广播的方式传输所述车辆通信数据；
    若所述需要进行广播的小区的数量大于所述第二预定数量，则选择通过多小区广播的方式传输所述车辆通信数据。
  6. 根据权利要求1至4中任一项所述的用于车辆通信的数据传输方法，其特征在于，确定所述车辆通信数据需要广播的范围的步骤，具体包括：
    接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型，根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或
    接收所述接收终端上报的位置信息，根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
  7. 一种用于车辆通信的数据传输装置，适用于基站或网络侧设备，其特征在于，包括：
    第一接收单元，用于接收发送终端发送的车辆通信数据；
    判断单元，用于根据接收所述车辆通信数据的接收终端的数量，或根据所述发送终端发送的指示信息，判断采用单播方式还是广播方式传输所述车辆通信数据；
    第一传输单元，用于在所述判断单元判定采用所述单播方式传输所述车辆通信数据时，将所述车辆通信数据通过所述单播方式直接传输至所述接收终端；
    第二传输单元，用于在所述判断单元判定采用所述广播方式传输所述车辆通信数据时，确定所述车辆通信数据需要广播的范围，并根据所述车辆通信数据需要广播的范围，选择通过单小区广播的方式或多小区广播的方式传输所述车辆通信数据。
  8. 根据权利要求7所述的用于车辆通信的数据传输装置，其特征在于，所述判断单元包括：
    第一执行单元，用于在所述接收终端的数量小于或等于第一预定数量时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述接收终端的数量大于所述第一预定数量时，判定采用所述广播方式传输所述车辆通信数据。
  9. 根据权利要求7所述的用于车辆通信的数据传输装置，其特征在于，所述判断单元包括：
    第一确定单元，用于根据所述发送终端发送的指示信息，确定所述车辆通信数据对应的车辆通信业务是单播业务还是组播业务；
    第二执行单元，用于在所述第一确定单元确定所述车辆通信业务是所述单播业务时，判定采用所述单播方式传输所述车辆通信数据，并用于在所述第一确定单元确定所述车辆通信业务是所述组播业务时，判定采用所述广播方式传输所述车辆通信数据。
  10. 根据权利要求9所述的用于车辆通信的数据传输装置，其特征在于，所述第一确定单元具体用于：
    根据所述发送终端发送的用于指示所述车辆通信业务是单播业务或组播业务的指示信息，确定所述车辆通信业务是单播业务或组播业务；或
    根据所述发送终端发送的用于指示所述车辆通信业务所属的业务类型 的指示信息，以及业务类型与单播业务/组播业务的对应关系，确定所述车辆通信业务是单播业务或组播业务。
  11. 根据权利要求7至10中任一项所述的用于车辆通信的数据传输装置，其特征在于，所述第二传输单元包括：
    第二确定单元，用于根据所述车辆通信数据需要广播的范围和相邻小区的信息，确定需要进行广播的小区；
    选择单元，用于在所述需要进行广播的小区的数量小于或等于第二预定数量时，选择通过单小区广播的方式传输所述车辆通信数据，并用于在所述需要进行广播的小区的数量大于所述第二预定数量时，选择通过多小区广播的方式传输所述车辆通信数据。
  12. 根据权利要求7至10中任一项所述的用于车辆通信的数据传输装置，其特征在于，所述第二传输单元包括：
    第二接收单元，用于接收所述发送终端上报的所述车辆通信数据对应的车辆通信业务所属的业务类型；第三确定单元，用于根据所述业务类型确定所述车辆通信数据需要广播的范围；和/或
    第三接收单元，用于接收所述接收终端上报的位置信息；第四确定单元，用于根据所述接收终端上报的位置信息确定所述车辆通信数据需要广播的范围。
  13. 一种基站，其特征在于，包括：如权利要求7至12中任一项所述的用于车辆通信的数据传输装置。
  14. 一种网络侧设备，其特征在于，包括：如权利要求7至12中任一项所述的用于车辆通信的数据传输装置。
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