CN107040972B

CN107040972B - Path selection method and device

Info

Publication number: CN107040972B
Application number: CN201610080141.8A
Authority: CN
Inventors: 陈琳; 陈玉芹; 刘颖; 马子江; 罗薇; 汪梦珍
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2022-06-21
Anticipated expiration: 2036-02-04
Also published as: WO2017133644A1; CN107040972A

Abstract

The invention provides a path selection method and a device, wherein the method comprises the following steps: receiving path indication information; selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: uu transmission path, side connected with Sidelink transmission path; and transmitting the service data in the Internet of vehicles system on the selected transmission path. The invention solves the problem of how to select the transmission path to transmit the service by the UE in the Internet of vehicles system in the related technology.

Description

Path selection method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a path selection method and apparatus.

Background

With the development of communication technology and the abundance of demand, the application scenarios of wireless communication are becoming wider, wherein a Vehicle Networking (Vehicle Networking) is more typical. The vehicle networking is that vehicles can participate in wireless communication, real-time information interaction between vehicles and road side infrastructures is realized by utilizing an advanced wireless cellular communication technology, current states (including positions, speeds, accelerations and driving paths of the vehicles) and known road environment information are informed to each other, road danger conditions are cooperatively sensed, various collision early warning information is timely provided, and road traffic safety accidents are prevented. The modes of the internet of vehicles communication are specifically divided into three types: Vehicle-to-Vehicle Communications (V2V for short), Vehicle-to-Infrastructure Communications (V2I for short), and Vehicle-to-Vehicle Communications (V2P for short), fig. 1 is a schematic diagram of a Vehicle networking scenario in the related art, as shown in fig. 1, and these three types may also be referred to as Vehicle-to-event (V2X) Communications.

The related art has proposed the possibility of using cellular wireless communication technology to implement car networking applications. As for V2V and V2P communications, the base station may receive the car networking information from the vehicle UE or pedestrian UE and transmit the car networking information to the vehicle UE or pedestrian UE of the serving cell. V2I generally refers to communication between a vehicle UE and a Road Side Unit (RSU), wherein the RSU is an entity supporting V2I services, and can receive internet of vehicles information from the vehicle UE and transmit the information to the vehicle UE. The RSU may be considered to be implemented by a base station or a stationary UE or a separate network element.

In the V2V/V2P/V2I Internet of vehicles communication mode, the transmission of Internet of vehicles information is mainly in a broadcast and multicast mode. The existing system base station supports a Broadcast mechanism based on a multicast/multicast Single frequency network (MBSFN) and a Single Cell-Point to Multi-Point (SC-PTM), and a direct discovery/communication (D2D, sidelink, ProSe) mechanism from the UE to the UE may also support Broadcast transmission of a message through a PC5 interface. In this case, the UE chooses whether to use Uu or PC5 interface for the transmission of the vehicle network information, and the existing systems have not yet given a complete solution.

Disclosure of Invention

The invention provides a path selection method and a path selection device, which are used for at least solving the problem of how to select a transmission path to transmit services by UE in an Internet of vehicles system in the related art.

According to an aspect of the present invention, there is provided a path selection method including: receiving path indication information; selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: a Uu transmission path, which is connected with a Sidelink transmission path; and transmitting the service data on the selected transmission path.

Further, the service data includes at least one of: low latency traffic data, internet of vehicles traffic data, proximity traffic data.

Further, the Uu transmission path includes at least one of: an uplink evolved packet domain system (EPS) path; the uplink EPS path is a path from service data sent by User Equipment (UE) to an application server through a base station, a serving gateway and a packet data network gateway; a local routing path; the local routing path is a path from the base station and the local gateway built in the base station to the application server, wherein the service data sent by the UE is sent to the application server through the base station and the local gateway built in the base station when the local gateway is built in the base station; a downlink unicast EPS path; the downlink unicast EPS path is a path from the service data sent by the application server to the UE through the packet data network gateway, the service gateway and the base station; multimedia broadcast multicast service MBMS broadcast path; the MBMS Broadcast path is a path in which service data sent by the application server passes through a Broadcast Multicast service center and an MBMS gateway to a base station, and then the base station sends the service data to the UE through a Multicast Single Frequency Network (MBSFN) or Single Cell-Point to Multipoint (SC-PTM) mechanism.

Further, the Sidelink transmission path is a direct communication path or a discovery path from the UE to the UE.

Further, the path indication information includes at least one of: the transmission range of the service data transmission; available resource information for transmitting service data; indication information for indicating the load of the Uu uplink resource or the Silelink resource; transmission delay information of the service data; path tendency indication information for indicating a selection path.

Further, the transmission range includes at least one of: a Uu downlink transmission region; multimedia Broadcast Multicast Service (MBMS) Broadcast area; a Sidelink transmission region; the UE authorizes the broadcast range; a broadcast range of the service data is specified.

Further, the MBMS broadcast area is determined according to at least one of the following information: geographic range information; wherein, different geographical ranges correspond to different sizes of MBMS broadcast areas; broadcasting range level information; the broadcast ranges of different levels correspond to MBMS broadcast areas of different sizes; cell level information; wherein, the cells of different levels correspond to MBMS broadcast areas of different sizes.

Further, the Sidelink transmission region is determined by at least one of: maximum transmission power of Sidelink transmission service data; the transmission power level of the Sidelink transmission service data, wherein different transmission power levels correspond to different maximum transmission powers; the method comprises the steps that a Sidelink discovers an authorization range set corresponding to a resource pool or a communication resource pool; different sildelink discovery resource pools or communication resource pools correspond to different authorization range sets, and different sildelink discovery resource pools or communication resource pools correspond to different maximum transmission power and/or minimum transmission power.

Further, selecting a transmission path according to the path indication information includes: judging whether at least one of the following transmission ranges is located in the UE authorized broadcast range or the service data broadcast range: uu downlink transmission area, MBMS broadcast area, Sidelink transmission area; under the condition that the Sidelink transmission area is positioned in the UE authorized broadcast range or the service data broadcast range, selecting a Sidelink transmission path; and/or selecting a Uu transmission path under the condition that the Uu downlink transmission area or the MBMS broadcast area is positioned in the UE authorized broadcast range or the service data broadcast range.

Further, the available resources include at least one of: sildelink discovery or communication resources; wherein the Sidelink discovery or communication resources comprise at least one of: information indicating the presence of a Sidelink discovery transmission resource or a communication transmission resource; the method comprises the steps that a Sidelink discovery receiving resource pool or a communication receiving resource pool; the method comprises the steps that a Sidelink discovery sending resource pool or a communication sending resource pool; the Silelink finds and sends an abnormal resource pool or a communication sending abnormal resource pool; sildelink discovery transmission resources or communication transmission resources; sidelink discovers and sends semi-static resources or communication and sends semi-static resources; uu communication resources; wherein the Uu communication resources include at least one of: an uplink cellular transmission resource; sending resources of the uplink semi-static cell; a downlink cellular reception resource; a downlink semi-static cellular reception resource; downlink MBMS or SC-PTM reception resources.

Further, selecting a transmission path according to the path indication information includes: judging whether available resources exist according to the available resource information; judging whether the serving base station is configured with the Sidelink resource or not under the condition that the available resource exists; wherein the Sidelink resources comprise Sidelink discovery resources or communication resources; selecting the Sidelink transmission path under the condition that only the Sidelink resource exists; selecting the Uu transmission path in the presence of Uu communication resources only; and under the condition that the Sidelink resource and the Uu communication resource exist at the same time, selecting the Sidelink transmission path and/or the Uu transmission path according to a preset rule.

Further, the indication information for indicating the load of the Uu uplink resource or the Sidelink resource includes at least one of the following: information indicating that the request or use of the Sidelink resource is prohibited; information indicating a barring request or using a Sidelink resource timer; information indicating a priority or set of priorities for refraining from requesting or using the sildenk resources; information for indicating a low-latency service type or type set for forbidding requesting or using the Sidelink resource; information indicating the sildelink resource load; wherein the information includes at least one of: the degree of sildenk resource usage or congestion level; information indicating prohibition of requesting or using Uu uplink cellular resources; information indicating a prohibition of requesting or using a Uu uplink cellular resource timer; information indicating a priority or a set of priorities for prohibiting requesting or using Uu uplink cellular resources; information for indicating a low-latency service type or type set for prohibiting requesting or using the Uu uplink resource; information for indicating MBMS downlink broadcast resource congestion; information for instructing to reduce a transmission frequency of the low-latency service information; information for indicating recovery of the low-latency service information transmission frequency.

Further, the priority includes at least one of: the priority of each service data packet; a quality class indication, QCI; a logical channel priority; a logical channel group identification.

Further, selecting a transmission path according to the path indication information includes at least one of: under the condition that the path indication information is used for indicating that the request is forbidden or the Sidelink resource is used or the load of the Sidelink resource is higher than a first preset threshold value, selecting a Uu transmission path; under the condition that the path indication information is used for indicating the prohibition request or the timer using the Sidelink resource is overtime, continuing to select the Sidelink transmission path; under the condition that the path indication information is used for indicating the prohibition request or using the Uu resource timer to be overtime, continuing to select a Uu transmission path; under the condition that the path indication information is used for indicating that the request is forbidden or the Uu uplink cellular resource is used or the load of the Uu uplink cellular resource is higher than a second preset threshold value, selecting a Sidelink transmission path; suspending low-delay service transmission under the condition that the path indication information is used for indicating prohibition of requesting or using the Sidelink resource and the Uu uplink cellular resource; under the condition that the path indication information is used for indicating that the designated priority or the service data type is forbidden to use the Silelink resource, selecting a Uu transmission path to transmit the service data of the designated priority or type; under the condition that the path indication information is used for indicating that the designated priority or the service data type is forbidden to use the Uu uplink cellular resource, selecting a Silelink transmission path to transmit the service data of the designated priority or type; under the condition that the path indication information is used for indicating the congestion information of the MBMS downlink broadcast resources, the sending frequency of the service data is selected to be reduced, or the Sidelink transmission path is selected to be used; and reducing or recovering the transmission frequency through a higher layer of the UE under the condition that the path indication information is used for indicating the reduction or recovery of the transmission frequency of the low-delay service information.

Further, the transmission delay information is used to indicate at least one of: whether local routing or local gateway is supported; whether a local MBMS gateway or a local broadcast multicast service center or a local Internet of vehicles server is supported; whether RSU is supported; uu transmission delay pre-estimated value; wherein the Uu transmission delay estimate comprises at least one of: an uplink cellular transmission delay pre-estimated value; a downlink cellular unicast transmission delay pre-estimated value; a downlink cellular MBSFN transmission delay estimated value; a downlink cellular SC-PTM transmission delay estimated value; uu transmits the delay quantization level.

Further, selecting a transmission path according to the path indication information includes: at the base station, at least one of the following is not supported: selecting a Sidelink transmission path under the conditions of a local gateway, a local route, a local MBMS gateway, a local BM-SC, a local Internet of vehicles server and an RSU; otherwise, selecting a Uu transmission path; or, judging whether the Uu transmission delay estimated value or the Uu transmission delay quantization level meets the delay requirement threshold of the low-delay service, and if not, selecting the Sidelink transmission path.

Further, the path tendency indication information is used to indicate at least one of: sending only through a Sidelink transmission path; a service type or a service type set sent only through a Sidelink transmission path; transmitting only through a Uu transmission path; a service type or a service type set transmitted only through a Uu transmission path; the data volume ratio of the Sidelink transmission path and the Uu transmission path is sent; a Uu transmission path sends a data volume threshold; the method comprises the steps that a Sidelink transmission path sends a data volume threshold; a Uu transmission path transmits a cell Reference Signal Received Power (RSRP) threshold; a Sidelink transmission path transmits a cell RSRP threshold; receiving only through a Sidelink transmission path; a traffic type or a set of traffic types received only through the Sidelink transmission path; receiving only through a Uu transmission path; a traffic type or a set of traffic types received only over a Uu transmission path.

Further, receiving only over Uu includes at least one of: only over MBSFN reception; unicast reception over Uu only; only by SC-PTM reception.

Further, selecting a transmission path according to the path indication information includes: selecting the Sidelink transmission path under the condition that the path indication information indicates that the transmission is carried out only through the Sidelink transmission path or the reception is carried out only through the Sidelink transmission path; under the condition that the path indication information indicates the service type or the service type set only transmitted through the Sidelink transmission path or the service type set only received through the Sidelink transmission path, selecting the Sidelink transmission path; under the condition that the path indication information indicates the service type or the service type set only transmitted through the Uu transmission path or the service type set only received through the Uu transmission path, selecting the Uu transmission path; selecting a Uu transmission path under the condition that the path indication information indicates to transmit only through the Uu transmission path or receive only through the Uu transmission path; under the condition that the path indication information indicates the data quantity ratio of the Sidelink transmission path and the Uu transmission path, selecting the path according to the ratio; under the condition that the path indication information indicates a Sidelink transmission cell RSRP threshold, when detecting that the cell RSRP measured value meets the Sidelink transmission cell RSRP threshold, selecting a Sidelink transmission path; and under the condition that the path indication information indicates a Uu transmission cell RSRP threshold, selecting a Uu transmission path when detecting that the cell RSRP measurement value meets the Uu transmission cell RSRP threshold.

Further, receiving the path indication information includes: receiving the path indication information sent by at least one of the following devices through system broadcast messages and/or dedicated signaling: the system comprises a base station, a mobility management entity MME, multi-instance user network boundary equipment MCE, a vehicle networking server and a proximity service function entity.

Further, the path indication information is obtained by the base station from a mobility management entity MME or a multi-instance user network border device MCE or a car networking server.

Further, before receiving the path indication information, the method further includes: sending path request information; wherein the path request information includes at least one of: service request information; service type information; priority information corresponding to the service; wherein the priority information includes at least one of: the adjacent area Prose, QCI, logical channel priority and logical channel group identification of each data packet; delaying the demand information; sending cycle information of the service aiming at the periodic service transmission; the transmission rate of the service data; reliability requirement information; sildelink resource request information; sildelink semi-static resource request information; uplink cellular resource request information; uplink cellular semi-static resource request information; reporting information of the status of the Sidelink buffer area; and reporting information of the Uu buffer area state.

According to an aspect of the present invention, there is provided a path selection apparatus including: a receiving module, configured to receive path indication information; the selection module is used for selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: uu transmission path, side connected with Sidelink transmission path; and the transmission module is used for transmitting the service data in the Internet of vehicles system on the selected transmission path.

According to the invention, the proper transmission path is selected according to the received path indication information, and the service data is transmitted on the selected transmission path, so that the problem of how to select the transmission path to transmit the service by the UE in the vehicle networking system in the related technology is solved, and the transmission of the service data in the vehicle networking system is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic illustration of a related art Internet of vehicles scenario;

FIG. 2 is a flow chart of a path selection method according to an embodiment of the invention;

fig. 3a is a network architecture diagram of a base station or RSU acting as a base station for MBMS-based internet information transmission according to a preferred embodiment of the present invention;

FIG. 3b is a diagram of a network architecture in which a base station or RSU acting as a base station performs Internet of things information transfer based on cellular communications in accordance with a preferred embodiment of the present invention;

fig. 3c is a network architecture diagram of a base station or RSU acting as a base station for the transmission of networking information based on local routing according to the preferred embodiment of the present invention;

FIG. 3d is a schematic diagram of the transmission of Internet of vehicles information between vehicles over a PC5 interface in accordance with a preferred embodiment of the present invention;

fig. 4 is a flow chart diagram of a path selection method according to the preferred embodiment 1 of the present invention;

fig. 5 is a flow chart diagram of a path selection method according to the preferred embodiment 2 of the present invention;

fig. 6 is a flow chart diagram of a path selection method according to the preferred embodiment 3 of the present invention;

fig. 7 is a flow chart diagram of a path selection method according to the preferred embodiment 4 of the present invention;

fig. 8 is a flow chart diagram of a path selection method according to a preferred embodiment 5 of the present invention;

fig. 9 is a block diagram of a path selection apparatus according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, a path selection method is provided, and fig. 2 is a flowchart of the path selection method according to the embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:

step S202, receiving path indication information;

step S204, selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: a Uu transmission path, which is connected with a Sidelink transmission path;

step S206, transmitting the service data on the selected transmission path.

Through the steps, the appropriate transmission path is selected according to the received path indication information, and the service data is transmitted on the selected transmission path, so that the problem of how to select the transmission path to transmit the service by the UE in the vehicle networking system in the related technology is solved, and the transmission of the service data in the vehicle networking system is realized.

It should be noted that the service data may be service data in an internet of vehicles system, but is not limited to this, and the service data includes at least one of the following: low latency traffic data, internet of vehicles traffic data, proximity traffic data. The Uu transmission path includes at least one of: an uplink evolved packet domain system (EPS) path; the uplink EPS path is a path from service data sent by User Equipment (UE) to an application server through a base station, a serving gateway and a packet data network gateway; a local routing path; the local routing path is a path from the UE to an application server through the base station and a local gateway built in the base station when the local gateway is built in the base station; a downlink unicast EPS path; the downlink unicast EPS path is a path from the service data sent by the application server to the UE through the packet data network gateway, the service gateway and the base station; multimedia broadcast multicast service MBMS broadcast path; the MBMS broadcast path is a path that service data sent by an application server is sent to a base station through a broadcast multicast service center and an MBMS gateway, and then the service data is sent to UE by the base station through a multicast single frequency network MBSFN or a single cell-point to multipoint SC-PTM mechanism. The Sidelink transmission path is a direct communication path or a discovery path from the UE to the UE. The above-described sildelink transmission path may be realized by a PC5 interface.

Specifically, the service data may be transmitted in a data packet manner, so that the uplink unicast EPS path may be a path in which the UE sends a data packet to the base station and the data packet is forwarded by the base station to the serving gateway, the serving gateway forwards the data packet to the packet data network gateway, and the packet data network gateway forwards the data packet to the application server; when the uplink local routing path can be a local gateway built in the base station, the data packet sent to the base station by the UE is processed by the local gateway built in the base station and is sent to the application server by the local gateway; the downlink unicast EPS path can be a path that the packet data network gateway receives a data packet sent by the application server and then forwards the data packet to the service gateway, the service gateway forwards the data packet to the base station, and the base station sends the data unicast to the UE; the downlink MBMS broadcast path can be a path that a broadcast multicast service center receives a data packet sent by an application server and then the data packet is forwarded to an MBMS gateway by the broadcast multicast service center, the MBMS gateway forwards the data packet to a base station, and the base station broadcasts and sends the data to UE through an MBSFN or SC-PTM mechanism;

It should be noted that the transmission range may include at least one of the following: a Uu downlink transmission region; an MBMS broadcast area; a Sidelink transmission region; the UE authorizes the broadcast range; a broadcast range of the service data is specified.

The MBMS broadcast area may be determined according to at least one of the following information: geographic range information; wherein, different geographical ranges correspond to different sizes of MBMS broadcast areas; broadcasting range level information; wherein, the broadcast ranges of different levels correspond to MBMS broadcast areas of different sizes; cell level information; wherein, the cells of different levels correspond to MBMS broadcast areas of different sizes. The broadcast range level can be large, medium and small broadcast ranges, the MBMS broadcast area corresponding to the large broadcast range is large, otherwise the MBMS broadcast area corresponding to the small broadcast range is small. The cell level may be a single cell, multiple cells, or a cell cluster, or may be a cell range of one hop, two hops, or three hops, but is not limited thereto. The MBMS broadcast range is different for different cell levels.

The above-mentioned Sidelink transmission region may be determined by at least one of: maximum transmission power of Sidelink transmission service data; the transmission power level of the Sidelink transmission service data, wherein different transmission power levels correspond to different maximum transmission powers; the method comprises the steps that a Sidelink discovers an authorization range set corresponding to a resource pool or a communication resource pool; different sildelink discovery resource pools or communication resource pools correspond to different authorization range sets, and different sildelink discovery resource pools or communication resource pools correspond to different maximum transmission power and/or minimum transmission power. The maximum transmission power of traffic data may be used to indicate the above-described Sidelink transmission region.

It should be noted that the transmission power level corresponds to different maximum transmission powers, and naturally may indicate different Sidelink transmission regions, and the transmission power level may include high, medium, and low. A range of transmit power may correspond to a transmit power level, and specifically, how many ranges of transmit power each transmit power level corresponds to may be set according to actual conditions. Each authorization range may correspond to a Sidelink discovery resource pool or a communication resource pool, and the Sidelink discovery resource pool or the communication resource pool may determine the transmission power of the service data, and may further indicate a Sidelink transmission region. The method for determining the Sidelink transmission region may be selected according to specific situations, and various methods for determining the Sidelink transmission region may be used in combination, but not limited thereto.

Further, in the case that the path indication information is a transmission range of service data transmission, the step S204 may be represented as: judging whether at least one of the following transmission ranges is located in the UE authorized broadcast range or the service data broadcast range: uu downlink transmission area, MBMS broadcast area, Sidelink transmission area; under the condition that the Sidelink transmission area is positioned in the UE authorized broadcast range or the service data broadcast range, selecting a Sidelink transmission path; and/or selecting a Uu transmission path under the condition that the Uu downlink transmission area or the MBMS broadcast area is positioned in the UE authorized broadcast range or the service data broadcast range. The selection of the Sidelink transmission path or the Uu transmission path for transmitting the traffic data can be determined by the transmission range of the traffic data. It should be noted that the above-mentioned determination method is only one preferred embodiment of the present invention, and is not limited thereto.

In an embodiment of the present invention, the available resources may include at least one of: sildelink discovery or communication resources; wherein the Sidelink discovery or communication resource may comprise at least one of: information indicating the presence of a Sidelink discovery transmission resource or a communication transmission resource; sidelink discovers a receiving resource pool or a communication receiving resource pool; the method comprises the steps that a Sidelink discovery sending resource pool or a communication sending resource pool; the Silelink finds and sends an abnormal resource pool or a communication sending abnormal resource pool; sildelink discovery transmission resources or communication transmission resources; the Sidelink finds and sends the semi-static resource or communication sends the semi-static resource; uu communication resources; wherein the Uu communication resources may include at least one of: an uplink cellular transmission resource; sending resources of the uplink semi-static cell; a downlink cellular reception resource; a downlink semi-static cellular reception resource; downlink MBMS or SC-PTM reception resources.

Further, when the path indication information is the available resource, the step S204 may be represented as: judging whether available resources exist according to the available resource information; judging whether the serving base station is configured with the Sidelink resource or not under the condition that the available resource exists; wherein the Sidelink resources comprise Sidelink discovery resources or communication resources; selecting the Sidelink transmission path under the condition that only the Sidelink resource exists; selecting the Uu transmission path in a case where only Uu communication resources exist; and under the condition that the Sidelink resource and the Uu communication resource exist at the same time, selecting the Sidelink transmission path and/or the Uu transmission path according to a preset rule.

It should be noted that, in the case that there is no available resource, the Sidelink transmission may be performed through a resource pre-configured by the terminal, but is not limited thereto.

It should be noted that the Sidelink resource may include a Sidelink discovery resource or a communication resource, and the cellular resource may include a Uu communication resource. Specifically, the predetermined rule may be determined according to actual situations, or may be preset to transmit traffic data through a Sidelink transmission path in the presence of a Sidelink resource, or may be preset to transmit traffic data through a Uu transmission path in the presence of a Sidelink resource, or may be preset to set some judgment rules, and may be determined to select a Uu transmission path or a Sidelink transmission path in the presence of some information, such as access stratum information, satisfying a certain condition, but is not limited to this.

In an embodiment of the present invention, the indication information for indicating the load of the Uu uplink resource or the Sidelink resource may include at least one of the following: information indicating that the request or use of the Sidelink resource is prohibited; information indicating a barring request or using a Sidelink resource timer; information indicating a priority or set of priorities for banning requesting or using the Sidelink resource; information for indicating a low-latency service type or type set for forbidding requesting or using the Sidelink resource; information indicating the sildelink resource load; wherein the information may include at least one of: the degree of sildenk resource usage or congestion level; information indicating prohibition of requesting or using Uu uplink cellular resources; information indicating a prohibition of requesting or using a Uu uplink cellular resource timer; information indicating a priority or a set of priorities for prohibiting requesting or using Uu uplink cellular resources; information for indicating a low-latency service type or type set for prohibiting requesting or using the Uu uplink resource; information for indicating MBMS downlink broadcast resource congestion; information for instructing to reduce a transmission frequency of the low-latency service information; information for indicating recovery of the low-latency service information transmission frequency.

It should be noted that the usage level or the congestion level of the Sidelink resource may be high, medium, or low, where a high usage level indicates a heavy load, and a low usage indicates a small load, and the congestion level is similar, and will not be described herein again.

It should be noted that the priority may include at least one of the following: the priority of each service data packet; quality classification indication, QCI; a logical channel priority; a logical channel group identification. The concept of priority exists in the quality classification indication, for example, if the service type contained in the quality classification indication is video or voice, the priority of the video may be higher than that of the voice, and thus the priority may be represented by the quality classification indication. The logical channel group identifier is used to identify the logical channel, and different logical channels have different priorities, so that the priority can also be indicated by the logical channel group identifier, and thus the above logical channel priority can be indicated by the logical channel group identifier.

Further, when the path indication information is indication information for indicating a load of the Uu uplink resource or the Sidelink resource, the step S204 may be at least one of the following: under the condition that the path indication information is used for indicating that the request is forbidden or the Sidelink resource is used or the load of the Sidelink resource is higher than a first preset threshold value, selecting a Uu transmission path; under the condition that the path indication information is used for indicating the prohibition request or using the Silelink resource timer to time out, continuing to select the Silelink transmission path; under the condition that the path indication information is used for indicating the prohibition request or using the Uu resource timer to be overtime, continuing to select a Uu transmission path; under the condition that the path indication information is used for indicating that the request is forbidden or the Uu uplink cellular resource is used or the load of the Uu uplink cellular resource is higher than a second preset threshold value, selecting a Sidelink transmission path; when the path indication information is used for indicating that the request is forbidden or the Sidelink resource and the Uu uplink cellular resource are used, suspending the low-delay service transmission; under the condition that the path indication information is used for indicating that the designated priority or the service data type is forbidden to use the Silelink resource, selecting a Uu transmission path to transmit the service data of the designated priority or type; under the condition that the path indication information is used for indicating that the designated priority or the service data type is forbidden to use the Uu uplink cellular resource, selecting a Silelink transmission path to transmit the service data of the designated priority or type; under the condition that the path indication information is used for indicating the congestion information of the MBMS downlink broadcast resources, the sending frequency of the service data is selected to be reduced, or the Sidelink transmission path is selected to be used; and reducing or recovering the transmission frequency through a higher layer of the UE under the condition that the path indication information is used for indicating the reduction or recovery of the transmission frequency of the low-delay service information.

In an embodiment of the present invention, the transmission delay information may be used to indicate at least one of: whether local routing or local gateway is supported; whether a local MBMS gateway or a local broadcast multicast service center BM-SC or a local Internet of vehicles server is supported or not; whether RSU is supported; uu transmission delay pre-estimated value; wherein the Uu transmission delay estimation value may include at least one of: an uplink cellular transmission delay pre-estimated value; a downlink cellular unicast transmission delay pre-estimated value; a downlink cellular MBSFN transmission delay estimated value; a downlink cellular SC-PTM transmission delay estimated value; uu transmits the delay quantization level.

Further, in the case that the path indication information is the transmission delay information, the step S204 may be represented as: at the base station, at least one of the following is not supported: under the conditions of a local gateway, a local route, a local MBMS gateway, a local BM-SC, a local Internet of vehicles server and an RSU, selecting a Sidelink transmission path; otherwise, selecting a Uu transmission path; or, judging whether the Uu transmission delay estimated value or the Uu transmission delay quantization level meets the delay requirement threshold of the low-delay service, and if not, selecting the Sidelink transmission path.

In an embodiment of the present invention, the path tendency indication information may be used to indicate at least one of: sending only through a Sidelink transmission path; a service type or a service type set sent only through a Sidelink transmission path; transmitting only through a Uu transmission path; a service type or a service type set transmitted only through a Uu transmission path; the data volume ratio of the Sidelink transmission path and the Uu transmission path is sent; a Uu transmission path sends a data volume threshold; the method comprises the steps that a Sidelink transmission path sends a data volume threshold; a Uu transmission path transmits a cell Reference Signal Received Power (RSRP) threshold; a Sidelink transmission path transmits a cell RSRP threshold; receiving only through a Sidelink transmission path; a traffic type or a set of traffic types received only through the Sidelink transmission path; receiving only through a Uu transmission path; traffic type or set of traffic types received only over Uu transmission paths.

It should be noted that, receiving only through Uu may include at least one of the following: only over MBSFN reception; unicast reception over Uu only; only by SC-PTM reception.

Further, when the path indication information is the path tendency indication information, the step S204 may be represented by at least one of: selecting the Sidelink transmission path under the condition that the path indication information indicates that the transmission is carried out only through the Sidelink transmission path or the reception is carried out only through the Sidelink transmission path; under the condition that the path indication information indicates the service type or the service type set only transmitted through the Sidelink transmission path or the service type set only received through the Sidelink transmission path, selecting the Sidelink transmission path; under the condition that the path indication information indicates the service type or the service type set only transmitted through the Uu transmission path or the service type set only received through the Uu transmission path, selecting the Uu transmission path; selecting a Uu transmission path under the condition that the path indication information indicates to transmit only through the Uu transmission path or receive only through the Uu transmission path; under the condition that the path indication information indicates the data quantity ratio of the Sidelink transmission path and the Uu transmission path, selecting the path according to the ratio; under the condition that the path indication information indicates a Sidelink transmission cell RSRP threshold, when detecting that the cell RSRP measured value meets the Sidelink transmission cell RSRP threshold, selecting a Sidelink transmission path; and under the condition that the path indication information indicates a Uu transmission cell RSRP threshold, selecting a Uu transmission path when detecting that the cell RSRP measurement value meets the Uu transmission cell RSRP threshold.

It should be noted that the path indication information may be one or more of the transmission range, the available resource information, the indication information, the transmission delay information, and the path tendency indication information, where when the path indication information includes a plurality of types, the specific representation form of step S204 may be selected according to the priority of the information, for example, the priority of the available resource information is higher than that of the transmission range, and when the path indication information includes both the available resource information and the transmission range, the transmission path may be selected according to the available resource information preferentially, and if the transmission path is not determined yet, the transmission path is determined according to the transmission range, which is not limited thereto.

In an embodiment of the present invention, the step S202 may be implemented as follows: receiving the path indication information sent by at least one of the following devices through system broadcast messages and/or dedicated signaling: the system comprises a base station, a mobility management entity MME, multi-instance user network boundary equipment MCE, a vehicle networking server and a proximity service function entity. That is, the path indication information may be acquired through system broadcast messages and/or dedicated signaling.

It should be noted that the path indication information may also be obtained from a roadside unit, a vehicle networking server, a Prose functional entity, or a vehicle networking functional entity.

Before step S202, the method may further include: sending path request information; wherein the path request information may include at least one of: service request information; service type information; priority information corresponding to the service; wherein the priority information includes at least one of: the priority of each service data packet, QCI, the priority of a logic channel and the identification of a logic channel group; delaying the demand information; sending period information of the service aiming at periodic service transmission; the transmission rate of the service data; reliability requirement information; idelink resource request information; sildelink semi-static resource request information; uplink cellular resource request information; uplink cellular semi-static resource request information; reporting information of the status of the Sidelink buffer area; and reporting information of the Uu buffer area state.

It should be noted that the service request information may include a sending request and/or a receiving request information, the delay requirement may be a quantized delay requirement, such as an end-to-end delay that cannot exceed a predetermined threshold (e.g., 100ms), but is not limited thereto, and the reliability requirement information may include a packet loss rate requirement, such as a packet loss rate that does not exceed a predetermined threshold (e.g., 1%), but is not limited thereto.

By supporting the vehicle UE/pedestrian UE/RSU to receive the transmission range, the available resource and load condition of the vehicle networking information transmission, the transmission delay indication, the path tendency indication and other information, the vehicle UE/pedestrian UE/RSU selects and uses a proper path to transmit the vehicle networking related information according to the received path indication information, the resource load condition is comprehensively considered, the requirement of a diffusion area of the vehicle networking information transmission is guaranteed, and the low-delay high-reliability vehicle networking information transmission is realized.

For a better understanding of the invention, the above-described path selection method is further explained below in connection with preferred embodiments.

Fig. 3a is a network architecture diagram of the RSU serving as the base station or the base station according to the preferred embodiment of the present invention for performing the transmission of the car networking information based on the MBMS, as shown in fig. 3a, the car networking or pedestrian UE may send car networking related information to the base station through the Uu interface, the base station forwards the information to the content provider/car networking server of the MBMS through the core network, and then transmits the information to the base station needing to perform the car networking information broadcast through the BMSC and the MBMS gateway, and the base station sends the car networking information to the car or pedestrian UE in the broadcast area including the local cell through the MBSFN/SC-PTM method.

Fig. 3b is a network architecture diagram of a RSU serving as a base station or a base station according to a preferred embodiment of the present invention for performing internet of vehicle information transmission based on cellular communication, as shown in fig. 3b, an RSU of an internet of vehicle or pedestrian UE or UE type may send internet of vehicle related information to the base station through a Uu interface, the base station forwards the information to an internet of vehicle server through a core network, the internet of vehicle server then sends the information to a base station requiring internet of vehicle information broadcasting through a PGW/SGW, and the base station then sends the internet of vehicle information to vehicles or pedestrian UEs in a cell in a unicast manner.

Fig. 3c is a network architecture diagram of the RSU serving as the base station or the base station according to the preferred embodiment of the present invention for transmitting the car networking information based on the local routing, as shown in fig. 3c, the car networking or pedestrian UE may send the car networking related information to the base station through the Uu interface, and the base station then sends the car networking information to the car or pedestrian UE in the local cell in a broadcast/multicast/unicast manner. FIG. 3d is a schematic diagram of the transmission of Internet of vehicles information between vehicles over a PC5 interface, in accordance with a preferred embodiment of the present invention.

It should be noted that fig. 3a to 3d also show various transmission paths that may occur from the vehicle, for example, fig. 3d shows a Sidelink transmission path.

Generally, the information transmission of the internet of vehicles needs to comprehensively consider delay requirements, broadcast transmission range, available resources and load conditions. The internet of vehicles information transmission has higher requirement on delay, the Uu-based cellular transmission needs to be forwarded by a plurality of network elements, the end-to-end delay of the Uu-based cellular transmission is larger than that of the PC5 interface transmission, and if a base station supports a local gateway or a local route, the delay can be reduced appropriately. In addition, different car networking services have different transmission range requirements, the Uu-based MBMS and SC-PTM can generally realize larger broadcast range, while the sidelink transmission based on the PC5 interface is limited by transmission power, and is difficult to reach the area corresponding to the MBMS or SC-PTM broadcast by a plurality of cells. In addition, the available resources and load conditions of the Uu interface and the PC5 interface can be considered when the RSU of the UE or the UE type selects the path, so that the load balance of the resources of the two interfaces can be realized as much as possible. Besides considering the transmission path of the internet of vehicle information transmission, the transmission path of the internet of vehicle information reception also needs to be considered, for example, the UE can determine which interface needs to receive the internet of vehicle information transmitted on according to the type of service of interest. The following path selection procedure is given for several transmission paths and network architecture scenarios.

Preferred embodiment 1

The vehicles a and B are equipped with the UEs 1, 2 having car networking functions. The UE1 and the UE2 are in an E-UTRAN network coverage state, and the E-UTRAN network supports the car networking function.

Assuming that the vehicle a in which the UE1 is installed detects a vehicle safety function abnormality, the vehicle a desires to be able to send out an out-of-control warning message to surrounding vehicles. Fig. 4 is a schematic flow chart of a path selection method according to a preferred embodiment 1 of the present invention, and as shown in fig. 4, the flow chart includes:

step S402, the UE1 obtains the broadcast range corresponding to the out-of-control alarm service, the Internet of vehicles transmission range authorized by the UE and the delay requirement information from the V2X function.

In step S404, the UE1 detects system information broadcast by the base station, which includes available resource information that can be used for internet of vehicles transmission, a transmission delay indication (equivalent to the transmission delay information) and transmission range information. Available resources refer to resources used for low latency/internet of vehicle services, including sildelink discovery resources or communication resources, and/or Uu communication resources. Wherein the Sidelink discovery or communication resources comprise information indicating the presence of Sidelink discovery or communication transmission resources; the method comprises the steps that a Sidelink discovery receiving resource pool or a communication receiving resource pool; the method comprises the steps that a Sidelink discovery sending resource pool or a communication sending resource pool; the Silelink finds and sends an abnormal resource pool or a communication sending abnormal resource pool; sildelink discovery transmission resources or communication transmission resources; sidelink discovers, transmits, or communicates, semi-static resources, etc. The Uu communication resources include uplink cellular transmission resources; sending resources of the uplink semi-static cell; a downlink cellular reception resource; a downlink semi-static cellular reception resource; downlink MBMS or SC-PTM reception resources, etc. And the transmission delay indication comprises whether a local route/local gateway is supported, whether a local MBMS gateway/local BM-SC/local Internet of vehicles server is supported, whether RSU is supported, Uu transmission delay pre-estimated value, Uu transmission delay level and the like. The transmission range comprises a Uu downlink transmission area, an MBMS broadcast area and a Sidelink transmission area. Wherein the MBMS broadcast area refers to an MBMS information broadcast area supportable by a network or a base station. The Sidelink transmission region can be indicated by the maximum transmission power of the Sidelink transmission, or indicated by different levels of the Sidelink transmission power and the corresponding maximum transmission power, and the UE can calculate the transmission power corresponding to the Sidelink transmission through the information, so as to obtain the size of the Sidelink transmission region. The Sidelink transmission region may also be indicated by a set of authorized ranges corresponding to different Sidelink discovery/communication resource pools.

Step S406, the UE reports the information to the high layer, and the high layer determines whether the service information is transmitted through the Sidelink transmission path or the Uu transmission path. The UE can also report a high-level transmission range and a transmission delay indication, the high level can judge the delay condition of information transmission according to the transmission delay information, if the base station does not support a local gateway/a local route/a local MBMS gateway/a local BM-SC/a local Internet of vehicles server/RSU, the transmission delay of the data packet is longer, the UE can select a Sidelink transmission path preferentially, otherwise, the UE selects a Uu transmission path; the UE may also determine whether the delay requirement of the low delay service is met according to the Uu transmission delay estimated value or the delay level, and if not, select the Sidelink transmission path. Assuming that the higher layer of the UE1 finds that there is Uu transmission resource and that the Uu transmission path can meet the delay requirement and the broadcast region requirement, the Uu transmission path is selected.

And step S408, the high layer indicates the AS layer to transmit the Internet of vehicles data packet through the Uu transmission path.

After the data packet is sent to the service base station, the service base station forwards the information to a content provider/vehicle networking server of the MBMS through SGW/PGW, and then transmits the information to a base station which needs to broadcast vehicle networking information, such as a base station 2, through a BMSC and an MBMS gateway, the base station 2 sends the vehicle networking information to UE (user equipment) of vehicles or pedestrians in a cell in an SC-PTM (service support packet-multicast group) mode.

Assuming that a vehicular UE2 within the coverage of base station 2 is interested in receiving the car networking information, UE2 detects the G-RNTI corresponding to the car networking service of interest and receives the car networking message on the corresponding PDSCH. After the vehicle networking information is received, the UE2 parses the data packet containing the vehicle networking information, delivers the data packet containing the vehicle networking information to the logical channel/RLC receiving entity/PDCP receiving entity, and finally delivers the parsed vehicle networking information to the upper layer. Upon receipt of the vehicle networking message by the vehicle networking protocol layer of the UE2, the UE2 further determines whether the message is related to the vehicle in which the UE2 is installed and issues a prompt or warning to the driver.

After the UE1 selects to use Uu for uplink transmission, if the AS layer detects that an air interface link fails, the AS layer may report the sildelink abnormal resource pool and/or the sildelink transmission resource pool information to the high layer, and the high layer may select to switch to the sildelink abnormal resource pool or the sildelink transmission resource pool for information transmission through the sildelink resource.

Preferred embodiment 2

The vehicles a and B are equipped with the UEs 1, 2 having car networking functions. The UE1 and the UE2 are in an E-UTRAN network coverage state, and the E-UTRAN network supports the car networking function. When the vehicle A with the UE1 suddenly brakes and stops in the middle of the road, the Internet of vehicles application layer of the UE1 generates a warning vehicle alarm DENM message and hopes to send the warning vehicle alarm DENM message to surrounding vehicles.

Fig. 5 is a schematic flow chart of a path selection method according to a preferred embodiment 2 of the present invention, and as shown in fig. 5, the flow chart includes:

in step S502, the UE1 detects system information broadcast by the base station, where the system information includes load conditions and transmission range information that can be used for transmission resources of the internet of vehicles. The load situation may include information indicating that requests are prohibited or that the Sidelink resources are used; information indicating a barring request or using a Sidelink resource timer; information indicating a priority or set of priorities for refraining from requesting or using the sildenk resources; information for indicating a low-latency service type or type set for forbidding requesting or using the Sidelink resource; information indicating the sildelink resource load; wherein the information comprises at least one of: the degree of sildenk resource usage or congestion level; information indicating prohibition of requesting or using Uu uplink cellular resources; information indicating a prohibition of requesting or using a Uu uplink cellular resource timer; information indicating a priority or a set of priorities for prohibiting requesting or using Uu uplink cellular resources; information for indicating a low-latency service type or type set for prohibiting requesting or using the Uu uplink resource; information for indicating congestion of a MBMS downlink broadcast resource; information for instructing to reduce a transmission frequency of the low-latency service information; information for indicating recovery of the low latency traffic information transmission frequency. The transmission range comprises a Uu downlink transmission area, an MBMS broadcast area and a Sidelink transmission area. Wherein the MBMS broadcast area refers to an MBMS information broadcast area supportable by a network or a base station. The Sidelink transmission region can be indicated by the maximum transmission power of the Sidelink transmission, or indicated by different levels of the Sidelink transmission power and the corresponding maximum transmission power, and the UE can calculate the transmission power corresponding to the Sidelink transmission through the information, so as to obtain the size of the Sidelink transmission region. The Sidelink transmission region may also be indicated by a set of authorized ranges corresponding to different Sidelink discovery/communication resource pools.

Step S504, UE detects the Uu up run resource, Sidelink resource load situation according to the load situation information, if the request/use of Sidelink resource is forbidden or Sidelink resource load is high, then the Uu transmission path is selected; if the prohibit request or the Sidelink resource timer is indicated, the UE can open the prohibit request/use Sidelink resource timer, and when the timer is overtime, the UE can continue to consider using the Sidelink resource; if the request/use of the Uu uplink cellular resource is forbidden or the Uu uplink cellular resource load is high, selecting a Sidelink transmission path; if the prohibition request or the use of the Uu resource timer is indicated, the UE can start the prohibition request/use of the Uu resource timer, and when the timer is overtime, the UE can continue to consider using the Uu resource; if the request/use of the Sidelink resource and the Uu uplink cellular resource is forbidden at the same time, the UE suspends the low-delay service transmission; if the load condition indicates that a certain priority is forbidden or a certain service type uses the Sidelink or Uu uplink cellular resource, the UE uses the Uu transmission path or the Sidelink transmission path to transmit the Internet of vehicles information of the corresponding service type; if the load condition indicates to reduce or recover the low-delay service information sending frequency indication, the UE sends the low-delay service information to the high layer, and the high layer reduces the sending frequency or recovers the sending frequency; if the indication indicates the information indicating the MBMS downlink broadcast resource congestion, the UE can select to reduce the sending frequency of the Internet of vehicles information or select to use a Sidelink transmission path for transmission, in addition, the congestion information can also set different congestion levels, and when the congestion level is high, the UE selects to use the Sidelink transmission path for transmission. Assuming that the UE1 detects the MBMS downlink broadcast resource congestion indication and the transmission area of the sildelink communication can meet the broadcast range requirement of the emergency stop service, the sildelink transmission path is selected.

And step S506, the high layer indicates the AS layer to transmit the Internet of vehicles data packet through Sidelink.

The vehicle UE2 near the UE1 is interested in receiving the Internet of vehicles information, and then the UE2 acquires the Sidelink communication receiving resource pool information of the system information broadcast and monitors the Internet of vehicles information transmitted through the PC5 interface. After receiving the car networking information sent by the UE1, the UE2 analyzes the data packet containing the car networking information, delivers the data packet containing the car networking information to a logical channel/RLC receiving entity/PDCP receiving entity corresponding to the car networking bearer, and finally delivers the analyzed warning vehicle warning DENM message to a high layer or a car networking protocol layer. Upon receipt of the warning vehicle alert DENM message by the internet protocol layer of the UE2, the UE2 further determines whether the event is associated with the vehicle in which the UE2 is installed and issues a warning to the driver.

Preferred embodiment 3

The vehicle a is equipped with a UE1 having a car networking function. The UE1 is in an E-UTRAN network covered state and the E-UTRAN network supports the car networking function. The UE1 receives the base station broadcast and sends the car networking system information, indicating that the base station supports car networking information transmission. Fig. 6 is a flowchart of a path selection method according to a preferred embodiment 3 of the present invention, and as shown in fig. 6, the flowchart includes:

step S602, assuming that the UE1 is interested in sending the car networking information, the UE1 sends a car networking information transmission request message to the base station, requesting the base station to send car networking information path configuration information, where the request message may include a low-latency service sending request, a low-latency service category, a low-latency service priority, a low-latency service delay requirement, a low-latency service period, a low-latency service data rate, and a low-latency service reliability requirement. In addition, the UE may also directly carry a Sidelink resource configuration request, a Sidelink semi-static resource configuration request, an uplink cellular semi-static resource configuration request, and the like in the request.

Step S604, after receiving the information, the base station may configure a path tendency indication for the UE through a dedicated signaling according to the sildelink resource and the congestion condition of the cellular resource, where the path tendency indication specifically includes at least one of the following: sending only through a Sidelink transmission path; a service type or a service type set sent only through a Sidelink transmission path; transmitting only through a Uu transmission path; a service type or a service type set transmitted only through a Uu transmission path; the data volume ratio of the Sidelink transmission path and the Uu transmission path is sent; a Uu transmission path sends a data volume threshold; the method comprises the steps that a Sidelink transmission path sends a data volume threshold; a Uu transmission path transmits a cell Reference Signal Received Power (RSRP) threshold; a Sidelink transmission path transmits a cell RSRP threshold; receiving only through a Sidelink transmission path; a traffic type or a set of traffic types received only through the Sidelink transmission path; receiving only through a Uu transmission path; traffic type or set of traffic types received only over Uu transmission paths. Wherein receiving over Uu comprises at least one of: only over MBSFN reception, only over Uu unicast reception, only over SC-PTM reception.

Step S606, the UE judges the transmission path according to the path tendency indication information, if the service type or the service type set sent only through the Sidelink transmission path is indicated, the UE only sends the indicated service information corresponding to the service type sent only through the Sidelink transmission path, for example, only the CAM message or the periodic Internet of vehicles information is sent through the Sidelink; if the UE only transmits through the Uu transmission path, the UE selects the Uu transmission path to transmit; if the service type or the service type set which is only sent through the Uu transmission path is indicated, the UE only sends the indicated service information corresponding to the service type which is only sent through the Uu transmission path, for example, only DENEM information or event trigger vehicle networking information is sent through the Uu transmission path; if the UE receives the data only through the Sidelink transmission path, the UE selects the Sidelink transmission path to receive; if the service type or the service type set received only through the Sidelink transmission path is indicated, the UE receives corresponding Internet of vehicles information through the Sidelink transmission path when interested in receiving the indicated service type; if the UE receives through the Uu transmission path only, the UE selects the Uu transmission path to receive; if the service type or the service type set received only through the Uu transmission path is indicated, the UE receives corresponding Internet of vehicles information through the Uu transmission path when the UE is interested in receiving the indicated service type; if indicating the data quantity ratio of the Sidelink and the Uu, the high layer controls the data packet sent by the Sidelink and the Uu transmission path according to the ratio; if indicating Sidelink transmission cell RSRP threshold, UE uses Sidelink transmission path to transmit and or receive when detecting that cell RSRP measurement value meets threshold requirement; if the Uu transmission cell RSRP threshold is indicated, the UE uses a Uu transmission path to transmit and/or receive when detecting that the cell RSRP measurement value meets the threshold requirement; assuming that the UE1 receives a traffic type or a set of traffic types received only through Sidelink and a traffic type or a set of traffic types received only through Uu, the UE1 informs the above information to higher layers. The high layer decides which data packets of the Internet of vehicles are transmitted through Uu and which data packets are transmitted through Sidelink, and instructs the access AS layer to transmit through a corresponding interface.

Preferred embodiment 4

The vehicle a is equipped with a UE1 having a car networking function. The UE1 is in an E-UTRAN network covered state and the E-UTRAN network supports the car networking function. The UE1 receives the base station broadcast and sends the information of the car networking system, indicating that the base station supports the car networking information transmission. Fig. 7 is a flowchart of a path selection method according to a preferred embodiment 4 of the present invention, and as shown in fig. 7, the flowchart includes:

step S702, assuming that the UE1 is interested in receiving the Internet of vehicles information, the UE1 sends Internet of vehicles information receiving request information to the base station, and requests the base station to send Internet of vehicles information path configuration information, wherein the request information may include a low-delay service sending request, a low-delay service category, a low-delay service priority, a low-delay service delay requirement, a low-delay service period, a low-delay service data rate, and a low-delay service reliability requirement. In addition, the UE may also directly carry a Sidelink resource configuration request, a Sidelink semi-static resource configuration request, an uplink cellular semi-static resource configuration request, and the like in the request.

Step S704, after receiving the information, the base station may configure a path tendency indication for the UE through a dedicated signaling according to the sildelink resource and the congestion condition of the cellular resource, where the path tendency indication specifically includes at least one of the following: sending only through a Sidelink transmission path; a service type or a service type set sent only through a Sidelink transmission path; transmitting only through a Uu transmission path; a service type or a service type set transmitted only through a Uu transmission path; the data volume ratio of the Sidelink transmission path and the Uu transmission path is sent; a Uu transmission path sends a data volume threshold; the Sidelink transmission path sends a data volume threshold; a Uu transmission path transmits a cell Reference Signal Received Power (RSRP) threshold; a Sidelink transmission path transmits a cell RSRP threshold; receiving only through a Sidelink transmission path; a traffic type or a set of traffic types received only through the Sidelink transmission path; receiving only through a Uu transmission path; a traffic type or a set of traffic types received only over a Uu transmission path. Wherein receiving over Uu comprises at least one of: only over MBSFN reception, only over Uu unicast reception, only over SC-PTM reception.

Step S706, if the service type or the service type set sent only through the Sidelink transmission path is indicated, the UE sends the indicated service information corresponding to the service type sent only through the Sidelink transmission path, for example, only the CAM message or the periodic Internet of vehicles message is sent through the Sidelink; if the UE only transmits through the Uu transmission path, the UE selects the Uu transmission path to transmit; if the service type or the service type set which is only sent through the Uu transmission path is indicated, the UE only sends the indicated service information corresponding to the service type which is only sent through the Uu transmission path, for example, only DENEM information or event trigger vehicle networking information is sent through the Uu transmission path; if the UE receives the data only through the Sidelink transmission path, the UE selects the Sidelink transmission path to receive; if the service type or the service type set received only through the Sildelink transmission path is indicated, the UE receives corresponding Internet of vehicles information through the Sildelink transmission path when interested in receiving the indicated service type; if the UE receives through the Uu transmission path only, the UE selects the Uu transmission path for receiving; if the service type or the service type set received only through the Uu transmission path is indicated, the UE receives corresponding Internet of vehicles information through the Uu transmission path when the UE is interested in receiving the indicated type of service; if the data volume ratio of Sidelink and Uu is indicated, the high layer controls the data packets sent through the Sidelink and Uu transmission paths according to the ratio; if indicating Sidelink transmission cell RSRP threshold, UE uses Sidelink transmission path to transmit and or receive when detecting that cell RSRP measurement value meets threshold requirement; if the Uu transmission cell RSRP threshold is indicated, the UE uses a Uu transmission path to transmit and/or receive when detecting that the cell RSRP measurement value meets the threshold requirement; assuming that the UE1 receives a traffic type or a set of traffic types received only through Sidelink and a traffic type or a set of traffic types received only through Uu, the UE1 informs the above information to higher layers. The higher layer decides which interfaces need to be received. Assuming that the higher layer indicates that the AS layer receives Uu and that the PC5 interface networking packets are transmitted over Uu, the UE1 receives both the Uu's MBSFN or SC-PTM broadcast and the Sidelink communication.

Preferred embodiment 5

Fig. 8 is a flowchart of a path selection method according to preferred embodiment 5 of the present invention, and preferred embodiments 1 to 4 describe that a base station sends path indication configuration information to a UE through system broadcast or a dedicated signaling. As shown in fig. 8, heretofore, the method may further include: the base station may receive the following information from the MME/MCE/car networking server: UE low-delay service/vehicle networking service authorization range information, an MBMS broadcast area, a Sidelink broadcast area, MBMS broadcast congestion indication, low-delay service information transmission frequency reduction/recovery indication, low-delay service information transmission frequency recovery indication, data/service/bearing priority or priority set forbidding uplink cellular transmission, low-delay service type or type set forbidding uplink cellular transmission and the like. The information can be transmitted through an S1 port or an M1/M3 interface and is used for reasonable transmission path indication of the base station.

It should be noted that the higher layer in the above preferred embodiments 1 to 5 may refer to a non-access NAS layer or an application layer, and is not limited thereto.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method according to the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a path selection device is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and the description of the path selection device is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 9 is a block diagram of a path selecting apparatus according to an embodiment of the present invention, and as shown in fig. 9, the apparatus includes:

a receiving module 92, configured to receive the path indication information;

a selection module 94, connected to the receiving module 92, for selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: uu transmission path, side connected with Sidelink transmission path;

and the transmission module 96 is connected with the selection module 94 and is used for transmitting the service data in the internet of vehicles system on the selected transmission path.

Through the device, the selection module 94 selects a proper transmission path according to the received path indication information, and the transmission module 96 transmits the service data on the selected transmission path, so that the problem of how to select the transmission path for transmitting the service by the UE in the Internet of vehicles system in the related art is solved, and the transmission of the service data in the Internet of vehicles system is realized.

It should be noted that the path indication information may include at least one of the following: the transmission range of the service data transmission; available resource information for transmitting service data; indication information for indicating the load of the Uu uplink resource or the Silelink resource; transmission delay information of the service data; path tendency indication information for indicating a selection path.

It should be noted that, the explanation of the transmission range and how to select the transmission path in the case where the path indication information is the transmission range, interpretation of the available resource information and how to select a transmission path in the case where the path indication information is the available resource information, interpretation of the indication information and how to select a transmission path in the case where the path indication information is the indication information, interpretation of the transmission delay information and how to select a transmission path in the case where the path indication information is the transmission delay information, the explanation of the path tendency indication information and how to select the transmission path when the path tendency indication information is the path tendency indication information are the same as those of the above method embodiments, and are not described herein again, it should be noted that the process of selecting the transmission path is completed by the selection module 94 no matter which of the above information the path tendency indication information is.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: all the modules are positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, receiving path indication information;

s2, selecting transmission path according to the path indication information; wherein the transmission path includes at least one of: uu transmission path, side connected with Sidelink transmission path;

and S3, transmitting the service data on the selected transmission path.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

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

1. A method for path selection, comprising:

receiving path indication information;

selecting a transmission path according to the path indication information; wherein the transmission path includes at least one of: uu transmission path, side connected with Sidelink transmission path;

transmitting service data on the selected transmission path;

the path indication information includes at least one of: a transmission range of the service data transmission; available resource information for transmitting the service data; indication information for indicating the load of the Uu uplink resource or the Silelink resource; transmission delay information of the service data;

the indication information for indicating the load of the Uu resource or the Silelink resource comprises at least one of the following information:

information indicating that the request or use of the Sidelink resource is prohibited;

information indicating a barring request or using a Sidelink resource timer;

information indicating a priority or set of priorities for refraining from requesting or using the sildenk resources;

information for indicating a low-latency service type or type set for forbidding requesting or using the Sidelink resource;

information indicating the sildelink resource load; wherein the information comprises at least one of: the degree of sildenk resource usage or congestion level;

information indicating prohibition of requesting or using Uu uplink cellular resources;

information indicating a prohibition of requesting or using a Uu uplink cellular resource timer;

information indicating a priority or a set of priorities for prohibiting requesting or using Uu uplink cellular resources;

information for indicating a low-latency service type or type set for prohibiting requesting or using the Uu uplink resource;

information for indicating congestion of a MBMS downlink broadcast resource;

information for instructing to reduce a transmission frequency of the low-latency service information;

information for indicating recovery of the low latency traffic information transmission frequency.

2. The method of claim 1, wherein the traffic data comprises at least one of: low latency traffic data, internet of vehicles traffic data, proximity traffic data.

3. The method of claim 1, wherein the Uu transmission path comprises at least one of:

an uplink evolved packet domain system (EPS) path; the uplink EPS path is a path from the service data sent by the UE to an application server through a base station, a service gateway and a packet data network gateway;

a local routing path; the local routing path is a path from the base station and the local gateway built in the base station to the application server, wherein the service data sent by the UE is sent by the base station when the local gateway is built in the base station;

a downlink unicast EPS path; the downlink unicast EPS path is a path from the service data sent by the application server to the UE through the packet data network gateway, the service gateway and the base station;

multimedia broadcast multicast service MBMS broadcast path; the MBMS broadcast path is a path that the service data sent by the application server is sent to the base station through the broadcast multicast service center and the MBMS gateway, and then the base station sends the service data to the UE through the multicast single frequency network MBSFN or a single cell-point to multipoint SC-PTM mechanism.

4. The method of claim 1, wherein the Sidelink transmission path is a UE-to-UE direct communication path or a discovery path.

5. The method according to any one of claims 1 to 4, wherein the path indication information further comprises:

path tendency indication information for indicating selection of the path.

6. The method of claim 1, wherein the transmission range comprises at least one of:

a Uu downlink transmission region;

an MBMS broadcast area;

a Sidelink transmission region;

the UE authorizes the broadcast range;

a broadcast range of the service data.

7. The method of claim 6, wherein the MBMS broadcast area is determined according to at least one of the following information:

geographic range information; wherein, different geographical ranges correspond to different sizes of MBMS broadcast areas;

broadcasting range level information; the broadcast ranges of different levels correspond to MBMS broadcast areas of different sizes;

cell level information; wherein, the cells of different levels correspond to MBMS broadcast areas of different sizes.

8. The method of claim 6, wherein the Sidelink transmission region is determined by at least one of: maximum transmission power of Sidelink transmission service data;

the transmission power level of the Sidelink transmission service data, wherein different transmission power levels correspond to different maximum transmission powers;

the method comprises the steps that a Sidelink discovers an authorization range set corresponding to a resource pool or a communication resource pool; different sildelink discovery resource pools or communication resource pools correspond to different authorization range sets, and different sildelink discovery resource pools or communication resource pools correspond to different maximum transmission power and/or minimum transmission power.

9. The method of claim 6, wherein selecting a transmission path according to the path indication information comprises:

judging whether at least one of the following transmission ranges is located in the UE authorized broadcast range or the service data broadcast range: the Uu downlink transmission area, the MBMS broadcast area and the Sidelink transmission area;

selecting the Sidelink transmission path under the condition that the Sidelink transmission area is located in the UE authorized broadcast range or the service data broadcast range; andor or

And under the condition that the Uu downlink transmission area or the MBMS broadcast area is located in the UE authorized broadcast range or the broadcast range of the service data, selecting the Uu transmission path.

10. The method of claim 1, wherein the available resources comprise at least one of:

sildelink discovery or communication resources; wherein the Sidelink discovery or communication resources comprise at least one of: information indicating the presence of a Sidelink discovery transmission resource or a communication transmission resource; the method comprises the steps that a Sidelink discovery receiving resource pool or a communication receiving resource pool; the method comprises the steps that a Sidelink discovery sending resource pool or a communication sending resource pool; the Silelink finds and sends an abnormal resource pool or a communication sending abnormal resource pool; a Sidelink discovery transmission resource or a communication transmission resource; the Sidelink finds and sends the semi-static resource or communication sends the semi-static resource;

a Uu communication resource; wherein the Uu communication resources include at least one of: an uplink cellular transmission resource; uplink semi-static cellular transmission resources; a downlink cellular reception resource; a downlink semi-static cellular reception resource; downlink MBMS or SC-PTM reception resources.

11. The method of claim 10, wherein selecting a transmission path according to the path indication information comprises:

judging whether the available resources exist according to the available resource information;

judging whether the serving base station is configured with the Sidelink resource or not under the condition that the available resource exists; wherein the Sidelink resources comprise Sidelink discovery resources or communication resources; selecting the Sidelink transmission path under the condition that only the Sidelink resource exists; selecting the Uu transmission path in a case where only Uu communication resources exist; and under the condition that the Sidelink resource and the Uu communication resource exist at the same time, selecting the Sidelink transmission path and/or the Uu transmission path according to a preset rule.

12. The method of claim 1, wherein the priority comprises at least one of:

the priority of each service data packet;

quality classification indication, QCI;

a logical channel priority;

a logical channel group identification.

13. The method of claim 1, wherein selecting a transmission path according to the path indication information comprises at least one of:

under the condition that the path indication information is used for indicating that a request is forbidden or a Sidelink resource is used or the load of the Sidelink resource is higher than a first preset threshold value, selecting the Uu transmission path;

under the condition that the path indication information is used for indicating a prohibition request or using a Silelink resource timer to time out, continuing to select a Silelink transmission path;

under the condition that the path indication information is used for indicating a prohibition request or using a Uu resource timer to be overtime, continuing to select a Uu transmission path; under the condition that the path indication information is used for indicating that the request is forbidden or the Uu uplink cellular resource is used or the load of the Uu uplink cellular resource is higher than a second preset threshold value, selecting the Sidelink transmission path;

under the condition that the path indication information is used for indicating that the request is forbidden or the Sidelink resource and the Uu uplink cellular resource are used, suspending service data transmission;

under the condition that the path indication information is used for indicating that the designated priority or the service data type is forbidden to use the Silelink resource, selecting the Uu transmission path to transmit the service data of the designated priority or type;

selecting the Sidelink transmission path to transmit the service data with the assigned priority or type under the condition that the path indication information is used for indicating that the assigned priority or service data type is forbidden to use Uu uplink cellular resources;

under the condition that the path indication information is used for indicating the congestion information of the MBMS downlink broadcast resources, the sending frequency of the service data is selected to be reduced, or a Sidelink transmission path is selected to be used;

and reducing the transmission frequency or recovering the transmission frequency through a high layer of the UE under the condition that the path indication information is used for indicating to reduce or recover the transmission frequency of the low-delay service information.

14. The method of claim 1, wherein the transmission delay information is used to indicate at least one of:

whether local routing or local gateway is supported;

whether a local MBMS gateway or a local broadcast multicast service center BM-SC or a local Internet of vehicles server is supported;

whether a roadside unit RSU is supported;

uu transmission delay pre-estimated value; wherein the Uu transmission delay estimate comprises at least one of: an uplink cellular transmission delay pre-estimated value; a downlink cellular unicast transmission delay pre-estimated value; a downlink cellular MBSFN transmission delay estimated value; a downlink cellular SC-PTM transmission delay estimated value;

uu transmits the delay quantization level.

15. The method of claim 14, wherein selecting a transmission path according to the path indication information comprises:

at the base station, at least one of the following is not supported: the local gateway, the local route, the local MBMS gateway, the local BM-SC, the local Internet of vehicles server, and the RSU select the Sidelink transmission path; otherwise, selecting the Uu transmission path; alternatively, the first and second electrodes may be,

and judging whether the Uu transmission delay estimated value or the Uu transmission delay quantization level meets a delay requirement threshold of low-delay service, and if not, selecting the Sidelink transmission path.

16. The method according to claim 5, wherein the path tendency indication information is used to indicate at least one of:

sending only through a Sidelink transmission path;

a service type or a service type set which is only sent through a Sidelink transmission path;

transmitting only through a Uu transmission path;

a service type or a service type set transmitted only through a Uu transmission path;

the data volume ratio of the Sidelink transmission path and the Uu transmission path is sent;

a Uu transmission path sends a data volume threshold;

the method comprises the steps that a Sidelink transmission path sends a data volume threshold;

a Uu transmission path transmits a cell Reference Signal Received Power (RSRP) threshold;

a Sidelink transmission path transmits a cell RSRP threshold;

receiving only through a Sidelink transmission path;

a traffic type or a set of traffic types received only through the Sidelink transmission path;

receiving only through a Uu transmission path;

traffic type or set of traffic types received only over Uu transmission paths.

17. The method of claim 16, wherein the receiving over the Uu-only transmission path comprises at least one of:

receiving through MBSFN;

unicast reception through Uu;

and receiving through SC-PTM.

18. The method of claim 16, wherein selecting a transmission path according to the path indication information comprises at least one of:

selecting the Sidelink transmission path when the path indication information indicates that the transmission is performed only through the Sidelink transmission path or the reception is performed only through the Sidelink transmission path;

selecting the Sidelink transmission path under the condition that the path indication information indicates the service type or the service type set only transmitted through the Sidelink transmission path or the service type set only received through the Sidelink transmission path;

selecting the Uu transmission path under the condition that the path indication information indicates the service type or the service type set only transmitted through the Uu transmission path or the service type set only received through the Uu transmission path;

selecting a Uu transmission path under the condition that the path indication information indicates that the path is transmitted only through the Uu transmission path or received only through the Uu transmission path;

under the condition that the path indication information indicates the data volume sending ratio of a Sidelink transmission path and a Uu transmission path, selecting the path according to the ratio;

under the condition that the path indication information indicates a Sidelink transmission cell RSRP threshold, when detecting that a cell RSRP measurement value meets the Sidelink transmission cell RSRP threshold, selecting the Sidelink transmission path;

and under the condition that the path indication information indicates a Uu transmission cell RSRP threshold, selecting the Uu transmission path when detecting that the cell RSRP measurement value meets the Uu transmission cell RSRP threshold.

19. The method of claim 1, wherein receiving path indication information comprises:

receiving the path indication information sent by at least one of the following devices through system broadcast messages and/or dedicated signaling: the system comprises a base station, a mobility management entity MME, multi-instance user network boundary equipment MCE, a vehicle networking server and a proximity service function entity.

20. The method of claim 1, wherein prior to receiving the path indication information, the method further comprises:

sending path request information; wherein the path request information includes at least one of:

service request information;

service type information;

priority information corresponding to the service; wherein the priority information includes at least one of: the priority of each service data packet, QCI, the priority of a logic channel and the identification of a logic channel group;

delaying the demand information;

sending period information of the service aiming at periodic service transmission;

transmission rate information of the service data;

reliability requirement information;

sildelink resource request information;

sildelink semi-static resource request information;

uplink cellular resource request information;

uplink cellular semi-static resource request information;

reporting information of the status of the Sidelink buffer area;

and reporting information of the Uu buffer area state.

21. A path selection device, comprising:

a receiving module, configured to receive path indication information;

a selection module, configured to select a transmission path according to the path indication information; wherein the transmission path includes at least one of: a Uu transmission path, which is connected with a Sidelink transmission path;

the transmission module is used for transmitting the service data in the Internet of vehicles system on the selected transmission path;

information indicating a barring request or using a Sidelink resource timer;

information indicating a priority or set of priorities for banning requesting or using the Sidelink resource;

information indicating the sildelink resource load; wherein the information comprises at least one of: the degree of Sidelink resource usage or congestion level;

information for indicating congestion of a MBMS downlink broadcast resource;

information for indicating recovery of the low-latency service information transmission frequency.

22. The apparatus of claim 21, wherein the path indication information further comprises:

path tendency indication information for indicating selection of the path.