CN105430621B - Data transmission method and device for vehicle communication, base station and network side equipment - Google Patents
Data transmission method and device for vehicle communication, base station and network side equipment Download PDFInfo
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- CN105430621B CN105430621B CN201510753213.6A CN201510753213A CN105430621B CN 105430621 B CN105430621 B CN 105430621B CN 201510753213 A CN201510753213 A CN 201510753213A CN 105430621 B CN105430621 B CN 105430621B
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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
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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
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
Abstract
The invention provides a data transmission method and device for vehicle communication, a base station and network side equipment, wherein the data transmission method for the vehicle communication comprises the following steps: receiving vehicle communication data sent by a sending terminal; judging whether the vehicle communication data is transmitted in a unicast mode or a broadcast mode according to the number of receiving terminals for receiving the vehicle communication data or according to indication information sent by a sending terminal; when the vehicle communication data are judged to be transmitted in a unicast mode, the vehicle communication data are directly transmitted to a receiving terminal in the unicast mode; when the vehicle communication data are judged to be transmitted in a broadcasting mode, the range of the vehicle communication data needing to be broadcasted is determined, and the vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the range of the vehicle communication data needing to be broadcasted. The technical scheme of the invention realizes the support of the V2V transmission mechanism based on the Uu interface, and can realize the V2V communication with high efficiency and transmission resource saving.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a data transmission method for vehicle communication, a data transmission device for vehicle communication, a base station and network side equipment.
Background
V2X (Vehicle to X, Vehicle-to-specific target communication) is a project approved by 3GPP RAN #68, and mainly studies a Vehicle data transmission scheme based on a 3GPP communication protocol. V2X includes V2V (Vehicle to Vehicle communication), V2P (Vehicle to industrial Person communication), V2I (Vehicle to interior structure communication), and the like. V2V communication can in principle be performed over the Uu interface (interface between user equipment and base station) and the PC5 interface (interface between user equipment and user equipment), and 3GPP is currently studying two mechanisms. The existing downlink transmission mechanism includes Uu interface unicast, Uu interface 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).
However, the existing mechanism can not fully support the V2V transmission based on the Uu interface. Specifically, due to the requirements of V2V service, data transmission may be one-to-one or one-to-many. As shown in fig. 1, if vehicle 108 generates a V2V data, it may need to be sent to one or more of vehicle 110, vehicle 112, vehicle 114, vehicle 116, and vehicle 118, and these receiving vehicles may be located in the cell covered by base station 102, i.e. in the same serving cell as transmitting vehicle 108, or may be located under other cells. It can be seen that the Uu interface-based transmission mechanism needs to determine whether to adopt a Uu interface unicast mechanism or an eMBMS or SC-PTM mechanism, but a scheme for selecting a transmission mechanism according to the distribution and cell structure of a receiving terminal has not been implemented in the prior art.
Therefore, how to select a transmission mechanism of the V2V service to realize efficient and transmission resource-saving V2V communication is a technical problem to be solved urgently.
Disclosure of Invention
Based on at least one of the above technical problems, the present invention provides a new data transmission scheme for vehicle communication, which implements support for a Uu interface-based V2V transmission mechanism, and can implement efficient and transmission resource-saving V2V communication.
In view of the above, according to a first aspect of the present invention, a data transmission method for vehicle communication is provided, which is applied to a base station or a network side device, and includes: receiving vehicle communication data sent by a sending terminal; judging whether the vehicle communication data is transmitted in a unicast mode or a broadcast mode according to the number of receiving terminals for receiving the vehicle communication data or according to indication information sent by the sending terminals; when the vehicle communication data are judged to be transmitted in the unicast mode, the vehicle communication data are directly transmitted to the receiving terminal in the unicast mode; when the vehicle communication data are judged to be transmitted in the broadcasting mode, the range of the vehicle communication data needing to be broadcasted is determined, and the vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the range of the vehicle communication data needing to be broadcasted.
In the technical scheme, whether a unicast mode or a broadcast mode is selected to transmit the vehicle communication data is judged according to the number of receiving terminals for receiving the vehicle communication data, so that a base station or network side equipment can autonomously select a transmission mechanism of the vehicle communication data according to the number of the receiving terminals; and the base station or the network side equipment can select the transmission mechanism of the vehicle communication data according to the instruction of the terminal by judging whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the instruction information sent by the sending terminal. Meanwhile, when the base station or the network side equipment judges that the vehicle communication data are transmitted in a broadcasting mode, the base station or the network side equipment can select a single-cell broadcasting (SC-PTM) mode or a multi-cell broadcasting (eMBMS) mode to transmit the vehicle communication data according to the range of the vehicle communication data needing broadcasting, so that the support of a V2V transmission mechanism based on a Uu interface is realized, and the efficient V2V communication which saves transmission resources can be realized.
In the foregoing technical solution, preferably, the step of determining whether to transmit the vehicle communication data in a unicast manner or a broadcast manner according to the number of receiving terminals that receive the vehicle communication data specifically includes: when the number of the receiving terminals is smaller than or equal to a first preset number, determining to transmit the vehicle communication data in the unicast mode; and when the number of the receiving terminals is larger than the first preset number, judging that the vehicle communication data are transmitted in the broadcasting mode.
In the technical scheme, when the number of the receiving terminals is less than or equal to a first preset number, the vehicle communication data is transmitted in a unicast mode, so that the waste of wireless transmission resources caused by a broadcast mode can be avoided when the number of the receiving terminals is small; and by transmitting the vehicle communication data in a broadcast manner when the number of the receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
In any of the above technical solutions, preferably, the step of determining whether to transmit the vehicle communication data in a unicast manner or a broadcast manner according to the indication information sent by the sending terminal specifically includes: 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; when the vehicle communication service is determined to be the unicast service, judging that the vehicle communication data are transmitted in the unicast mode; and when the vehicle communication service is determined to be the multicast service, determining to transmit the vehicle communication data in the broadcast mode.
In the technical scheme, the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirement of the vehicle communication service, so that the V2V communication which is efficient and saves transmission resources is ensured.
In any of the above technical solutions, preferably, 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:
determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
In any of the above technical solutions, preferably, the step of selecting to transmit the vehicle communication data in a single-cell broadcast manner or a multi-cell broadcast manner according to a range in which the vehicle communication data needs to be broadcast specifically includes: determining a cell needing to be broadcasted according to the range of the vehicle communication data needing to be broadcasted and the information of the adjacent cell; if the number of the cells needing broadcasting is less than or equal to a second preset number, selecting to transmit the vehicle communication data in a single-cell broadcasting mode; and if the number of the cells needing broadcasting is larger than the second preset number, selecting to transmit the vehicle communication data in a multi-cell broadcasting mode.
According to the technical scheme, vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the number of cells needing broadcasting, so that the broadcasting range can be reasonably determined, and high-efficiency transmission of vehicle communication data and high-efficiency utilization of resources in the broadcasting mode are achieved as far as possible.
In any one of the above technical solutions, preferably, the step of determining the range in which the vehicle communication data needs to be broadcast specifically includes: receiving a service type to which a vehicle communication service corresponding to the vehicle communication data reported by the sending terminal belongs, and determining a range in which the vehicle communication data needs to be broadcast according to the service type; and/or receiving the position information reported by the receiving terminal, and determining the range of the vehicle communication data needing broadcasting according to the position information reported by the receiving terminal.
In the technical scheme, the range of the vehicle communication data needing to be broadcasted is determined according to the received service type of the vehicle communication service reported by the sending terminal and/or the position information reported by the receiving terminal, so that the base station or the network side equipment can be assisted to quickly determine the range of the vehicle communication data needing to be broadcasted, the base station or the network side equipment can reasonably select a transmission mechanism of the vehicle communication data for broadcasting, and the high-efficiency transmission of the vehicle communication data and the high-efficiency utilization of resources in a broadcasting mode can be realized as far as possible.
According to the second aspect of the present invention, there is also provided a data transmission apparatus for vehicle communication, which is suitable for a base station or a network side device, and includes: a first receiving unit for receiving vehicle communication data transmitted by the transmitting terminal; the judging unit is used for judging whether the vehicle communication data is transmitted in a unicast mode or a broadcast mode according to the number of receiving terminals for receiving the vehicle communication data or according to the indication information sent by the sending terminal; the first transmission unit is used for directly transmitting the vehicle communication data to the receiving terminal in a unicast mode when the judging unit judges that the vehicle communication data are transmitted in the unicast mode; and the second transmission unit is used for determining the range of the vehicle communication data needing to be broadcasted when the judgment unit judges that the vehicle communication data are transmitted in the broadcasting mode, and selecting a single-cell broadcasting mode or a multi-cell broadcasting mode to transmit the vehicle communication data according to the range of the vehicle communication data needing to be broadcasted.
In the technical scheme, whether a unicast mode or a broadcast mode is selected to transmit the vehicle communication data is judged according to the number of receiving terminals for receiving the vehicle communication data, so that a base station or network side equipment can autonomously select a transmission mechanism of the vehicle communication data according to the number of the receiving terminals; and the base station or the network side equipment can select the transmission mechanism of the vehicle communication data according to the instruction of the terminal by judging whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the instruction information sent by the sending terminal. Meanwhile, when the base station or the network side equipment judges that the vehicle communication data are transmitted in a broadcasting mode, the base station or the network side equipment can select whether the vehicle communication data are transmitted in a multi-cell broadcasting (namely eMBMS) mode or a single-cell broadcasting (SC-PTM) mode according to the range of the vehicle communication data needing to be broadcasted, so that the support of a V2V transmission mechanism based on a Uu interface is realized, and the efficient V2V communication which saves transmission resources can be realized.
In the foregoing technical solution, preferably, the judging unit includes: a first execution unit configured to determine that the vehicle communication data is transmitted in the unicast manner when the number of the reception terminals is less than or equal to a first predetermined number, and configured to determine that the vehicle communication data is transmitted in the broadcast manner when the number of the reception terminals is greater than the first predetermined number.
In the technical scheme, when the number of the receiving terminals is less than or equal to a first preset number, the vehicle communication data is transmitted in a unicast mode, so that the waste of wireless transmission resources caused by a broadcast mode can be avoided when the number of the receiving terminals is small; and by transmitting the vehicle communication data in a broadcast manner when the number of the receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
In any one of the above technical solutions, preferably, the determining unit includes: a first determining unit, configured to determine, according to the indication information sent by the sending terminal, whether a vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service; a second execution unit configured to determine that the vehicle communication data is transmitted in the unicast manner when the first determination unit determines that the vehicle communication service is the unicast service, and configured to determine that the vehicle communication data is transmitted in the broadcast manner when the first determination unit determines that the vehicle communication service is the multicast service.
In the technical scheme, the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirement of the vehicle communication service, so that the V2V communication which is efficient and saves transmission resources is ensured.
In any one of the above technical solutions, preferably, the first determining unit is specifically configured to: determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
In any one of the above technical solutions, preferably, the second transmission unit includes: the second determining unit is used for determining the cell needing to be broadcasted according to the range needing to be broadcasted by the vehicle communication data and the information of the adjacent cell; the selection unit is used for selecting to transmit the vehicle communication data in a single-cell broadcasting mode when the number of the cells needing broadcasting is smaller than or equal to a second preset number, and selecting to transmit the vehicle communication data in a multi-cell broadcasting mode when the number of the cells needing broadcasting is larger than the second preset number.
According to the technical scheme, vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the number of cells needing broadcasting, so that the broadcasting range can be reasonably determined, and high-efficiency transmission of vehicle communication data and high-efficiency utilization of resources in the broadcasting mode are achieved as far as possible.
In any one of the above technical solutions, preferably, the second transmission unit includes: the second receiving unit is used for receiving the service type of the vehicle communication service corresponding to the vehicle communication data reported by the sending terminal; the third determining unit is used for determining the range of the vehicle communication data needing broadcasting according to the service type; and/or
A third receiving unit, configured to receive the location information reported by the receiving terminal; and the fourth determining unit is used for determining the range of the vehicle communication data needing to be broadcasted according to the position information reported by the receiving terminal.
In the technical scheme, the range of the vehicle communication data needing to be broadcasted is determined according to the received service type of the vehicle communication service reported by the sending terminal and/or the position information reported by the receiving terminal, so that the base station or the network side equipment can be assisted to quickly determine the range of the vehicle communication data needing to be broadcasted, the base station or the network side equipment can reasonably select a transmission mechanism of the vehicle communication data for broadcasting, and the high-efficiency transmission of the vehicle communication data and the high-efficiency utilization of resources in a broadcasting mode can be realized as far as possible.
According to the third aspect of the present invention, there is also provided a base station, including: the data transmission device for vehicle communication according to any one of the above aspects.
According to the fourth aspect of the present invention, a network side device is further provided, including: the data transmission device for vehicle communication according to any one of the above aspects.
By the technical scheme, the support of the V2V transmission mechanism based on the Uu interface is realized, namely the vehicle communication data can be reasonably transmitted in a unicast mode or a broadcast mode, and when the broadcast mode is selected, a single-cell broadcast mode or a multi-cell broadcast mode can be further selected, so that the high-efficiency transmission of the vehicle communication data and the high-efficiency utilization of resources in the broadcast mode are realized.
Drawings
Fig. 1 shows a scene diagram of V2V communication;
FIG. 2 shows a schematic flow diagram of a data transmission method for vehicle communication according to an embodiment of the invention;
FIG. 3 shows a schematic block diagram of a data transmission device for vehicle communication according to an embodiment of the present invention;
FIG. 4 shows a schematic block diagram of a base station according to an embodiment of the invention;
FIG. 5 shows a schematic block diagram of a network side device according to an embodiment of the invention;
fig. 6 shows a schematic flow diagram of a data transmission method for vehicle communication according to another embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 2 shows a schematic flow diagram of a data transmission method for vehicle communication according to an embodiment of the invention.
As shown in fig. 2, a data transmission method for vehicle communication according to an embodiment of the present invention is applied to a base station or a network side device, and includes:
step 202, vehicle communication data sent by a sending terminal is received;
and step 208, when the vehicle communication data is judged to be transmitted in the broadcasting mode, determining the range of the vehicle communication data needing to be broadcasted, and selecting a single-cell broadcasting mode or a multi-cell broadcasting mode to transmit the vehicle communication data according to the range of the vehicle communication data needing to be broadcasted.
In the technical scheme, whether a unicast mode or a broadcast mode is selected to transmit the vehicle communication data is judged according to the number of receiving terminals for receiving the vehicle communication data, so that a base station or network side equipment can autonomously select a transmission mechanism of the vehicle communication data according to the number of the receiving terminals; and the base station or the network side equipment can select the transmission mechanism of the vehicle communication data according to the instruction of the terminal by judging whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the instruction information sent by the sending terminal. Meanwhile, when the base station or the network side equipment judges that the vehicle communication data are transmitted in a broadcasting mode, the base station or the network side equipment can select whether the vehicle communication data are transmitted in a multi-cell broadcasting (namely eMBMS) mode or a single-cell broadcasting (SC-PTM) mode according to the range of the vehicle communication data needing to be broadcasted, so that the support of a V2V transmission mechanism based on a Uu interface is realized, and the efficient V2V communication which saves transmission resources can be realized.
In the foregoing technical solution, preferably, the step of determining whether to transmit the vehicle communication data in a unicast manner or a broadcast manner according to the number of receiving terminals that receive the vehicle communication data specifically includes: when the number of the receiving terminals is smaller than or equal to a first preset number, determining to transmit the vehicle communication data in the unicast mode; and when the number of the receiving terminals is larger than the first preset number, judging that the vehicle communication data are transmitted in the broadcasting mode.
In the technical scheme, when the number of the receiving terminals is less than or equal to a first preset number, the vehicle communication data is transmitted in a unicast mode, so that the waste of wireless transmission resources caused by a broadcast mode can be avoided when the number of the receiving terminals is small; and by transmitting the vehicle communication data in a broadcast manner when the number of the receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
In any of the above technical solutions, preferably, the step of determining whether to transmit the vehicle communication data in a unicast manner or a broadcast manner according to the indication information sent by the sending terminal specifically includes: 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; when the vehicle communication service is determined to be the unicast service, judging that the vehicle communication data are transmitted in the unicast mode; and when the vehicle communication service is determined to be the multicast service, determining to transmit the vehicle communication data in the broadcast mode.
In the technical scheme, the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirement of the vehicle communication service, so that the V2V communication which is efficient and saves transmission resources is ensured.
In any of the above technical solutions, preferably, 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:
determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
In any of the above technical solutions, preferably, the step of selecting to transmit the vehicle communication data in a single-cell broadcast manner or a multi-cell broadcast manner according to a range in which the vehicle communication data needs to be broadcast specifically includes: determining a cell needing to be broadcasted according to the range of the vehicle communication data needing to be broadcasted and the information of the adjacent cell; if the number of the cells needing broadcasting is less than or equal to a second preset number, selecting to transmit the vehicle communication data in a single-cell broadcasting mode; and if the number of the cells needing broadcasting is larger than the second preset number, selecting to transmit the vehicle communication data in a multi-cell broadcasting mode.
According to the technical scheme, vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the number of cells needing broadcasting, so that the broadcasting range can be reasonably determined, and high-efficiency transmission of vehicle communication data and high-efficiency utilization of resources in the broadcasting mode are achieved as far as possible.
In any one of the above technical solutions, preferably, the step of determining the range in which the vehicle communication data needs to be broadcast specifically includes: receiving a service type to which a vehicle communication service corresponding to the vehicle communication data reported by the sending terminal belongs, and determining a range in which the vehicle communication data needs to be broadcast according to the service type; and/or receiving the position information reported by the receiving terminal, and determining the range of the vehicle communication data needing broadcasting according to the position information reported by the receiving terminal.
In the technical scheme, the range of the vehicle communication data needing to be broadcasted is determined according to the received service type of the vehicle communication service reported by the sending terminal and/or the position information reported by the receiving terminal, so that the base station or the network side equipment can be assisted to quickly determine the range of the vehicle communication data needing to be broadcasted, the base station or the network side equipment can reasonably select a transmission mechanism of the vehicle communication data for broadcasting, and the high-efficiency transmission of the vehicle communication data and the high-efficiency utilization of resources in a broadcasting mode can be realized as far as possible.
Fig. 3 shows a schematic block diagram of a data transmission device for vehicle communication according to an embodiment of the present invention.
As shown in fig. 3, a data transmission apparatus 300 for vehicle communication according to an embodiment of the present invention is adapted 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 second transmitting unit 308.
The first receiving unit 302 is used for receiving the vehicle communication data sent by the sending terminal;
a determining unit 304, configured to determine whether to transmit the vehicle communication data in a unicast manner or in a broadcast manner according to the number of receiving terminals that receive the vehicle communication data or according to instruction information sent by the sending terminal;
a first transmission unit 306, configured to directly transmit the vehicle communication data to the receiving terminal in the unicast manner when the determination unit 304 determines that the vehicle communication data is transmitted in the unicast manner;
a second transmission unit 308, configured to, when the determination unit 304 determines that the vehicle communication data is transmitted in the broadcast manner, determine a range in which the vehicle communication data needs to be broadcast, and select a single-cell broadcast manner or a multi-cell broadcast manner to transmit the vehicle communication data according to the range in which the vehicle communication data needs to be broadcast.
In the technical scheme, whether a unicast mode or a broadcast mode is selected to transmit the vehicle communication data is judged according to the number of receiving terminals for receiving the vehicle communication data, so that a base station or network side equipment can autonomously select a transmission mechanism of the vehicle communication data according to the number of the receiving terminals; and the base station or the network side equipment can select the transmission mechanism of the vehicle communication data according to the instruction of the terminal by judging whether to select the unicast mode or the broadcast mode to transmit the vehicle communication data according to the instruction information sent by the sending terminal. Meanwhile, when the base station or the network side equipment judges that the vehicle communication data are transmitted in a broadcasting mode, the base station or the network side equipment can select whether the vehicle communication data are transmitted in a multi-cell broadcasting (namely eMBMS) mode or a single-cell broadcasting (SC-PTM) mode according to the range of the vehicle communication data needing to be broadcasted, so that the support of a V2V transmission mechanism based on a Uu interface is realized, and the efficient V2V communication which saves transmission resources can be realized.
In the above technical solution, preferably, the determining unit 304 includes: a first executing unit 3042 configured to determine to transmit the vehicle communication data in the unicast manner when the number of the receiving terminals is less than or equal to a first predetermined number, and to determine to transmit the vehicle communication data in the broadcast manner when the number of the receiving terminals is greater than the first predetermined number.
In the technical scheme, when the number of the receiving terminals is less than or equal to a first preset number, the vehicle communication data is transmitted in a unicast mode, so that the waste of wireless transmission resources caused by a broadcast mode can be avoided when the number of the receiving terminals is small; and by transmitting the vehicle communication data in a broadcast manner when the number of the receiving terminals is greater than the first predetermined number, efficient V2V communication can be ensured.
In any one of the above technical solutions, preferably, the determining unit 304 includes: a first determining unit 3044, configured to determine, according to the indication information sent by the sending terminal, whether a vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service; a second executing unit 3046 configured to, when the first determining unit 3044 determines that the vehicle communication service is the unicast service, determine to transmit the vehicle communication data in the unicast manner, and configured to, when the first determining unit 3044 determines that the vehicle communication service is the multicast service, determine to transmit the vehicle communication data in the broadcast manner.
In the technical scheme, the vehicle communication data can be transmitted in a unicast mode or a broadcast mode according to the requirement of the vehicle communication service, so that the V2V communication which is efficient and saves transmission resources is ensured.
In any of the above technical solutions, preferably, the first determining unit 3044 is specifically configured to: determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
In any of the above technical solutions, preferably, the second transmission unit 308 includes: a second determining unit 308A, configured to determine a cell that needs to be broadcasted according to the range that the vehicle communication data needs to be broadcasted and information of an adjacent cell; a selecting unit 308B, configured to select to transmit the vehicle communication data in a single-cell broadcast manner when the number of the cells requiring broadcasting is less than or equal to a second predetermined number, and select to transmit the vehicle communication data in a multi-cell broadcast manner when the number of the cells requiring broadcasting is greater than the second predetermined number.
According to the technical scheme, vehicle communication data are transmitted in a single-cell broadcasting mode or a multi-cell broadcasting mode according to the number of cells needing broadcasting, so that the broadcasting range can be reasonably determined, and high-efficiency transmission of vehicle communication data and high-efficiency utilization of resources in the broadcasting mode are achieved as far as possible.
In any of the above technical solutions, preferably, the second transmission unit 308 includes: a second receiving unit 308C, configured to receive a service type to which a 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 broadcast; and/or
A third receiving unit 308E, configured to receive the location information reported by the receiving terminal; a fourth determining unit 308F, configured to determine, according to the location information reported by the receiving terminal, a range in which the vehicle communication data needs to be broadcast.
In the technical scheme, the range of the vehicle communication data needing to be broadcasted is determined according to the received service type of the vehicle communication service reported by the sending terminal and/or the position information reported by the receiving terminal, so that the base station or the network side equipment can be assisted to quickly determine the range of the vehicle communication data needing to be broadcasted, the base station or the network side equipment can reasonably select a transmission mechanism of the vehicle communication data for broadcasting, and the high-efficiency transmission of the vehicle communication data and the high-efficiency utilization of resources in a broadcasting mode can be realized as far as possible.
Fig. 4 shows a schematic block diagram of a base station according to an embodiment of the invention.
As shown in fig. 4, a base station 400 according to an embodiment of the present invention includes: such as the data transmission device 300 for vehicle communication shown in fig. 3.
Fig. 5 shows a schematic block diagram of a network side device according to an embodiment of the invention.
As shown in fig. 5, the network side device 500 according to the embodiment of the present invention includes: such as the data transmission device 300 for vehicle communication shown in fig. 3. The network side device may be an MME (Mobility Management Entity), an MCE (Multi-Service CE), or the like.
The technical scheme of the invention mainly provides that a base station or network side equipment selects a unicast mode or a broadcast mode (including single-cell broadcast and multi-cell broadcast) to transmit vehicle communication data according to service requirements, and the following description is respectively given for the base station and the network side equipment.
The first embodiment is as follows: the scheme for selecting the propagation mechanism of the vehicle communication data is realized by the base station:
from the implementation point of view, it is assumed that a base station device supporting V2V communication can acquire some topology-related information in advance. Specifically, the base station needs to have certain self-coverage information (not required to be accurate to a meter level), adjacent cell topological relation information, and vehicle traveling area information (in the scenario shown in fig. 1, the vehicle travels along a predetermined route, and the base station needs to know the route information). Such information enables the base station to be more intelligent in selecting the propagation mode.
The specific scheme is as follows:
1. when the terminal transmits V2V data to the base station, the terminal needs to indicate to the base station whether the traffic associated with the data is unicast traffic or multicast traffic. The indication may be indicated in the user plane data or in the control signaling.
Specifically, the terminal may directly indicate to the base station whether the service is a unicast service or a multicast service; the traffic type may also be indicated to the base station, and then the base station may determine through the mapping relationship between the traffic type configured in the base station and unicast/multicast.
2. After receiving the data sent by the terminal and judging the unicast service or the multicast service type, the base station directly sends the downlink data if the unicast service or the multicast service type is unicast. If the service is multicast service, the judgment of the broadcast type is executed, specifically:
the base station judges the range which the V2V message needs to cover according to the service type, and judges which cells need to be broadcasted according to the adjacent cell information.
Specifically, if the range to be broadcasted can be covered by one base station or a small number of base stations, a single-cell broadcasting mechanism is performed; if the range needing broadcasting needs to be covered by a plurality of base stations, a multi-cell broadcasting mechanism is carried out. Wherein V2V messages may be transmitted in several cells over the X2 interface between base stations.
In particular, if the service type information provided by the transmitting terminal can help the base station deduce the potential receiving terminal group information and even the receiving terminal information, the serving base station can determine the broadcast cell range more accurately.
For example, if a V2V message is to be sent to a vehicle traveling in a group, assuming that the identification information of the group is acquired by RSUs (Road Side units) or base stations, the information can be exchanged between RSUs or base stations, so that the broadcast range can be determined more quickly when the V2V message is broadcast downstream.
Optionally, the receiving terminal that needs to acquire the group service data may also report its location (especially, the terminal in the connected state) to the RSU or the base station, so as to assist the base station to quickly determine the broadcast cell.
Example two: the scheme for selecting the propagation mechanism of the vehicle communication data is realized by the network side equipment:
from the implementation point of view, it is assumed that a network side device supporting V2V communication can acquire some topology-related information in advance. The specific scheme is as follows:
1. when the terminal sends 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 be sent by the network side device to the relevant base station according to the range of the concerned cell.
2. After receiving the data sent by the terminal and judging the unicast service or the multicast service type, the network side equipment directly sends the downlink data if the network side equipment is unicast. If the service is multicast service, the judgment of the broadcast type is executed, specifically:
and the network side equipment judges the range which needs to be covered by the V2V message according to the service type, and judges which cells need to be broadcasted according to the adjacent cell information.
Specifically, if the range to be broadcasted can be covered by one base station or a small number of base stations, a single-cell broadcasting mechanism is performed; if the range needing broadcasting needs to be covered by a plurality of base stations, a multi-cell broadcasting mechanism is carried out. Wherein V2V messages may be transmitted in several cells over the X2 interface between base stations.
In particular, if the service type information provided by the sending terminal can help the network side device deduce potential receiving terminal group information and even receiving terminal information, the network side device can also determine the broadcasted cell range more accurately.
It should be noted that according to the existing eMBMS and SC-PTM architectures, if the user plane data passes through the network side device, the implementation of the base station can be greatly simplified, i.e., the user data does not need to be stored and copied, and it is not necessary to maintain to which base stations each data packet needs to be forwarded. Therefore, the solution of the first embodiment (i.e., the solution for implementing the propagation mechanism for selecting vehicle communication data by the base station) requires changing the eMBMS and SC-PTM architectures so that the base station supports these functions. This has the advantage of helping to shorten the transmission delay of V2V, since an extra forwarding delay needs to be introduced through the network side device, which typically has a value at least above 20 ms.
The above process is illustrated with reference to fig. 6.
As shown in fig. 6, a data transmission method for vehicle communication according to another embodiment of the present invention includes:
in step 602, service data (such as vehicle communication service data) arrives at a base station or a network side device.
Step 610, when it is determined that the transmission is performed in the single cell mode, determining a cell to be transmitted according to the distribution range of the communication opposite end, and then performing single cell broadcast.
The technical scheme of the embodiment is that the base station or the network side equipment selects to transmit the vehicle communication data in a unicast mode, a single-cell broadcast mode or a multi-cell broadcast mode according to the indication of the terminal. Of course, the base station or the network side device may also autonomously determine the transmission mechanism of the vehicle communication data according to the number of the receiving terminals.
The technical scheme of the embodiment of the invention enables the V2V downlink transmission based on the Uu interface to select a unicast or broadcast/multicast mode according to the service requirement, and if the broadcast mode is adopted, the broadcast range can be reasonably determined, and the high-efficiency transmission of the V2V message and the high-efficiency utilization of resources in the broadcast mode can be realized as far as possible.
The technical scheme of the invention is described in detail in the above with reference to the accompanying drawings, and the invention provides a new data transmission scheme for vehicle communication, which realizes support for a Uu interface-based V2V transmission mechanism, that is, vehicle communication data can be reasonably selected to be transmitted in a unicast mode or a broadcast mode, and when the broadcast mode is selected, a single-cell broadcast mode or a multi-cell broadcast mode can be further selected, so that high-efficiency transmission of vehicle communication data and high-efficiency utilization of resources in the broadcast mode are realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A data transmission method for vehicle communication is suitable for a base station or network side equipment, and is characterized by comprising the following steps:
receiving vehicle communication data sent by a sending terminal;
judging whether the vehicle communication data is transmitted in a unicast mode or a broadcast mode according to the indication information sent by the sending terminal;
when the vehicle communication data are judged to be transmitted in the unicast mode, the vehicle communication data are directly transmitted to the receiving terminal in the unicast mode;
when the vehicle communication data are judged to be transmitted in the broadcasting mode, determining the range of the vehicle communication data needing to be broadcasted, and selecting a single-cell broadcasting mode or a multi-cell broadcasting mode to transmit the vehicle communication data according to the range of the vehicle communication data needing to be broadcasted;
the step of judging whether to adopt a unicast mode or a broadcast mode to transmit the vehicle communication data according to the indication information sent by the sending terminal specifically comprises the following steps:
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;
when the vehicle communication service is determined to be the unicast service, judging that the vehicle communication data are transmitted in the unicast mode;
when the vehicle communication service is determined to be the multicast service, determining that the vehicle communication data is transmitted in the broadcast mode;
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 comprising:
determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
2. The data transmission method for vehicle communication according to claim 1, wherein the step of selecting the transmission of the vehicle communication data in a single-cell broadcast manner or a multi-cell broadcast manner according to the range of the vehicle communication data to be broadcast specifically comprises:
determining a cell needing to be broadcasted according to the range of the vehicle communication data needing to be broadcasted and the information of the adjacent cell;
if the number of the cells needing broadcasting is less than or equal to a second preset number, selecting to transmit the vehicle communication data in a single-cell broadcasting mode;
and if the number of the cells needing broadcasting is larger than the second preset number, selecting to transmit the vehicle communication data in a multi-cell broadcasting mode.
3. The data transmission method for vehicle communication according to claim 1, wherein the step of determining the range to which the vehicle communication data needs to be broadcast specifically comprises:
receiving a service type to which a vehicle communication service corresponding to the vehicle communication data reported by the sending terminal belongs, and determining a range in which the vehicle communication data needs to be broadcast according to the service type; and/or
And receiving the position information reported by the receiving terminal, and determining the range of the vehicle communication data needing broadcasting according to the position information reported by the receiving terminal.
4. A data transmission device for vehicle communication, which is suitable for a base station or a network side device, is characterized by comprising:
a first receiving unit for receiving vehicle communication data transmitted by the transmitting terminal;
the judging unit is used for judging whether the vehicle communication data is transmitted in a unicast mode or a broadcast mode according to the indication information sent by the sending terminal;
the first transmission unit is used for directly transmitting the vehicle communication data to the receiving terminal in a unicast mode when the judging unit judges that the vehicle communication data are transmitted in the unicast mode;
the second transmission unit is used for determining the range of the vehicle communication data needing to be broadcasted when the judging unit judges that the vehicle communication data are transmitted in the broadcasting mode, and selecting a single-cell broadcasting mode or a multi-cell broadcasting mode to transmit the vehicle communication data according to the range of the vehicle communication data needing to be broadcasted;
the judging unit includes:
a first determining unit, configured to determine, according to the indication information sent by the sending terminal, whether a vehicle communication service corresponding to the vehicle communication data is a unicast service or a multicast service;
a second execution unit configured to determine that the vehicle communication data is transmitted in the unicast manner when the first determination unit determines that the vehicle communication service is the unicast service, and configured to determine that the vehicle communication data is transmitted in the broadcast manner when the first determination unit determines that the vehicle communication service is the multicast service;
the first determining unit is specifically configured to:
determining that the vehicle communication service is a unicast service or a multicast service according to indication information which is sent by the sending terminal and used for indicating that the vehicle communication service is the unicast service or the multicast service; or
And determining that the vehicle communication service is a unicast service or a multicast service according to the indication information which is sent by the sending terminal and used for indicating the service type to which the vehicle communication service belongs and the corresponding relation between the service type and the unicast service/multicast service.
5. The data transmission device for vehicle communication according to claim 4, wherein the second transmission unit includes:
the second determining unit is used for determining the cell needing to be broadcasted according to the range needing to be broadcasted by the vehicle communication data and the information of the adjacent cell;
the selection unit is used for selecting to transmit the vehicle communication data in a single-cell broadcasting mode when the number of the cells needing broadcasting is smaller than or equal to a second preset number, and selecting to transmit the vehicle communication data in a multi-cell broadcasting mode when the number of the cells needing broadcasting is larger than the second preset number.
6. The data transmission device for vehicle communication according to claim 4, wherein the second transmission unit includes:
the second receiving unit is used for receiving the service type of the vehicle communication service corresponding to the vehicle communication data reported by the sending terminal; the third determining unit is used for determining the range of the vehicle communication data needing broadcasting according to the service type; and/or
A third receiving unit, configured to receive the location information reported by the receiving terminal; and the fourth determining unit is used for determining the range of the vehicle communication data needing to be broadcasted according to the position information reported by the receiving terminal.
7. A base station, comprising: the data transmission device for vehicle communication according to any one of claims 4 to 6.
8. A network-side device, comprising: the data transmission device for vehicle communication according to any one of claims 4 to 6.
Priority Applications (2)
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| CN201510753213.6A CN105430621B (en) | 2015-11-05 | 2015-11-05 | Data transmission method and device for vehicle communication, base station and network side equipment |
| PCT/CN2016/072861 WO2017075920A1 (en) | 2015-11-05 | 2016-01-29 | Data transmission method and device for vehicle communications, base station, and network side device |
Applications Claiming Priority (1)
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| CN201510753213.6A CN105430621B (en) | 2015-11-05 | 2015-11-05 | Data transmission method and device for vehicle communication, base station and network side equipment |
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| CN106658352B (en) * | 2015-11-02 | 2019-03-22 | 中兴通讯股份有限公司 | The retransmission method and device of car networking V2X business |
| CN107241701B (en) * | 2016-03-28 | 2019-12-06 | 中国移动通信有限公司研究院 | data transmission method and device |
| CN109155905B (en) * | 2016-05-20 | 2021-05-04 | 华为技术有限公司 | Service message sending method, terminal equipment and network equipment |
| CN108140303A (en) * | 2016-05-30 | 2018-06-08 | 华为技术有限公司 | Method, apparatus, car-mounted terminal and the server that traffic message transmits |
| CN107635186A (en) * | 2016-07-12 | 2018-01-26 | 中兴通讯股份有限公司 | A kind of method of car networking resource allocation, car networking terminal and network side equipment |
| CN107666647B (en) * | 2016-07-29 | 2020-10-13 | 普天信息技术有限公司 | Data transmission method in vehicle direct connection system |
| US11228869B2 (en) * | 2017-03-31 | 2022-01-18 | Intel Corporation | Roadway communication system with multicast |
| US10880108B2 (en) * | 2017-06-14 | 2020-12-29 | Gogo Business Aviation Llc | Optimized wireless content loading scheduler |
| CN107613470B (en) * | 2017-09-05 | 2021-03-09 | 湖南基石通信技术有限公司 | Method and system for realizing multicast service in wireless Mesh network |
| US11134362B2 (en) * | 2018-05-15 | 2021-09-28 | Qualcomm Incorporated | Zone based soft resource partitioning for high reliability high range communication (HRHRC) |
| CN110831058A (en) * | 2018-08-08 | 2020-02-21 | 成都鼎桥通信技术有限公司 | PIS data transmission method and device |
| CN110830922B (en) * | 2018-08-10 | 2022-04-15 | 大唐移动通信设备有限公司 | Multicast communication method, device and terminal of direct link |
| KR20200029201A (en) * | 2018-09-10 | 2020-03-18 | 현대자동차주식회사 | Method and apparatus for v2v communication |
| CN110972301B (en) * | 2018-09-28 | 2022-03-29 | 大唐移动通信设备有限公司 | Unicast resource allocation method and device |
| CN109218995B (en) * | 2018-10-08 | 2021-08-20 | 腾讯科技（深圳）有限公司 | Communication method, communication device, computer readable medium and electronic equipment |
| CN111328040A (en) * | 2018-12-13 | 2020-06-23 | 普天信息技术有限公司 | Communication mode indication method and device of Internet of vehicles V2X |
| EP3697111A1 (en) | 2019-02-15 | 2020-08-19 | Volkswagen Aktiengesellschaft | System, vehicle, apparatuses, methods, and computer programs for user equipment and for a base station in a mobile communication system |
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| CN105430621A (en) | 2016-03-23 |
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