CN107040959B

CN107040959B - Method and device for controlling traffic congestion of Internet of vehicles

Info

Publication number: CN107040959B
Application number: CN201610080068.4A
Authority: CN
Inventors: 汪梦珍; 陈琳; 陈玉芹; 马子江
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2020-06-02
Anticipated expiration: 2036-02-04
Also published as: WO2017133501A1; CN107040959A

Abstract

The invention provides a method and a device for controlling service congestion of Internet of vehicles, wherein the method comprises the following steps: when the air interface is congested, the second network node receives congestion state information and/or congestion control operation information sent by the first network node; and the second network node controls the Internet of vehicles service according to the congestion state information and/or the congestion control operation information. The invention solves the problem of traffic congestion of an empty port or a PC5 interface V2X caused by slow running speed of the vehicle, high density of the vehicle and high frequency of sending V2X messages by the vehicle in the related art.

Description

Method and device for controlling traffic congestion of Internet of vehicles

Technical Field

The invention relates to the field of Internet of vehicles, in particular to a method and a device for controlling business congestion of the Internet of vehicles.

Background

Vehicle-to-electrical Communications (abbreviated as V2X) provides Vehicle information through sensors, Vehicle terminals, and electronic tags mounted on vehicles, and various Communication technologies are used to implement Vehicle-to-Vehicle Communications (abbreviated as V2V), Vehicle-to-human Communications (abbreviated as V2P), Vehicle-to-network Infrastructure Communications (abbreviated as V2I), Vehicle-to-network Communications (abbreviated as V2N), and Vehicle-to-network Communications (abbreviated as V2N), so as to extract and share information on an information network platform, thereby effectively utilizing and providing comprehensive services for vehicles.

Currently, 3GPP is discussing (Long Time Evolution, LTE for short) based V2X. The V2X traffic may be divided into V2V traffic, V2I traffic, V2N traffic, and V2P traffic, based on the other party participating in the communication. The V2P traffic refers to traffic between UEs communicating using V2P applications. V2N traffic refers to traffic in which a UE and a service entity communicate with each other through an LTE network entity using V2N applications. The V2I service refers to a service in which a UE and a roadside Unit (RSU) interact with each other using a V2I application. The RSU is an entity supporting the V2I service, and may transmit the V2I service to a UE using the V2I application, and may also receive the V2I service from a UE using the V2I service. The RSU may be implemented by a base station (eNB) or a stationary UE. If the RSU is implemented by the base station, it is called eNB type RSU. If the RSU is implemented by the UE, it is called UE type RSU. The V2V traffic refers to traffic between UEs communicating using V2V applications. V2V includes direct interaction of V2V related application information between UEs, or V2V related application information interaction between UEs through an infrastructure (e.g., RSU, application server, etc.) supporting V2X service due to the limitation of V2V direct communication range.

In addition, the 3GPP also discusses three scenarios of V2V, and fig. 1 is a schematic diagram of a V2X service scenario in the related art, as shown in fig. 1: scenario 1, which supports V2V communication based on PC5 interface only. The UE sends a V2X message to a plurality of UEs in a local area through a PC5 interface; scenario 2, which supports V2V communication based only on the Uu port. The UE transmits a V2X message to an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) in an uplink mode, and the E-UTRAN broadcasts the V2X message to a plurality of UEs in a local area in a downlink mode;

scenarios

3a and 3b that support V2V communications using Uu and PC5 interfaces. Scene 3 a: the UE sends a V2X message to other UEs through a PC5 interface, the UE type RSU receives the V2X message from the PC5 interface and then transmits the V2X message to the E-UTRAN, and the E-UTRAN broadcasts the V2X message received from the UE type RSU to a plurality of UEs in a local area. Scene 3 b: the UE transmits a V2X message to the E-UTRAN in an uplink mode, the E-UTRAN transmits the V2X message to one or more UE type RSUs after receiving a V2X message from a Uu port, and the UE type RSUs transmit the V2X message received from the E-UTRAN to a plurality of UEs in a local area through a PC5 interface. The E-UTRAN may Broadcast the V2X message downstream to a plurality of UEs in a local area through the existing Broadcast Multicast Service (MBMS) technology or Single-cell-point-to-multiple-point (SC-PTM) technology.

When the vehicle runs slowly, the vehicle density is high, and the frequency of the vehicle sending the V2X message is high, the traffic congestion of the air interface or the PC5 interface V2X is caused because the air interface wireless resource is not enough or the PC5 interface V2X communication resource is not enough. In view of the above problems in the related art, no effective solution exists at present.

Disclosure of Invention

The invention provides a method and a device for controlling service congestion of an internet of vehicles, which are used for at least solving the problem of service congestion of a Uu port or a PC5 interface V2X caused by slow running speed of vehicles, high vehicle density and high frequency of sending V2X messages by the vehicles in the related art.

According to one aspect of the invention, a method for controlling congestion of internet of vehicles traffic is provided, which comprises the following steps: when the air interface is congested, the second network node receives congestion state information and/or congestion control operation information sent by the first network node; and the second network node controls the Internet of vehicles service according to the congestion state information and/or congestion control operation information.

Further, when the air interface is Uu port, the first network node is a base station or a base station type roadside unit, and the second network node includes at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

Further, the congestion status information comprises at least one of: uu port uplink congestion state information and Uu port downlink congestion state information; wherein the Uu port uplink congestion state information includes at least one of: information indicating congestion, information indicating a degree of congestion; the Uu port downlink congestion state information comprises at least one of the following information: information for indicating congestion, information for indicating a degree of congestion, congestion traffic type information, congestion status information for each broadcast traffic channel, congestion status information for each cell under control of the first network node.

Further, the congestion control operation information includes at least one of: information for indicating Uu port congestion control operation, information for indicating a decrease in V2X periodic message transmission frequency, information for indicating a frequency level at which V2X messages are transmitted, configuration information of a semi-static resource period of V2X traffic, an indication to start/pause transmission of V2X periodic messages, configuration information of validity time, priority, and traffic type, configuration information specifying application congestion control parameters, configuration information of PDCP packet loss timer carried by V2X.

Further, when the second network node is a UE or a UE-type RSU, the controlling, by the second network node, the car networking service according to the congestion control operation information includes: the UE or the UE type RSU reduces the transmission frequency of V2X periodic messages, or reduces the transmission frequency level of V2X messages, or transmits V2X service according to the configuration information of semi-static resource period of V2X service, or according to the indication of starting/suspending the transmission of V2X periodic messages, the effective time, the priority and the configuration information of service type; or, when the UE or UE type RSU upper layer initiates the RRC connection establishment due to sending V2X application data, the UE or UE type RSU access layer detects whether the RRC connection establishment is restricted to the configuration parameter of the specified application congestion control parameter; when the access layer is limited by the configuration information of the specified application congestion control parameter, the UE or the UE type RSU terminates the establishment of RRC connection; or, the UE or the UE type RSU performs packet loss operation of V2X data according to a configured packet data convergence protocol PDCP packet loss timer carried by V2X.

Further, when the second network node is a UE or a UE type RSU, the manner in which the second network node controls the car networking service according to the congestion state information includes at least one of the following: the UE or UE type RSU notifies the V2X application layer of the congestion status information, wherein the V2X application layer decides whether to reduce the period of generating/transmitting V2X messages according to the congestion status information; the UE or the UE type RSU sends high-priority V2X data on the resources of periodic messages or common cellular messages preferentially according to the congestion state information; and the UE or the UE type RSU reports expected packet data convergence protocol PDCP packet loss timer configuration to the base station according to the congestion state information.

Further, when the second network node is the MCE, the controlling, by the second network node, the car networking service according to the congestion state information includes: the MCE converts the Temporary Mobile Group Identifier (TMGI) service broadcasted in a Multicast Broadcast Single Frequency Network (MBSFN) mode into a mode of broadcasting from a single cell point to multiple points (SC-PTM); and the MCE sends the SC-PTM information to the first network node through an MBMS session starting request message or an MBMS session updating request message.

Further, when the second network node is the BM-SC or V2X application server, the controlling, by the second network node, the car networking service according to the congestion state information includes: and the BM-SC or V2X application server merges or discards the V2X data packets according to the service type, priority and sending period of V2X.

According to another aspect of the present invention, there is provided a method for vehicle networking traffic congestion control, comprising: when the air interface is congested, the first network node sends congestion status information and/or congestion control operation information to the second network node.

Further, when the air interface is Uu port, the first network node is a base station or a base station type road side unit, RSU, and the second network node includes at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

Further, when the second network node is a UE or a UE type RSU, the base station or the base station type RSU sends the congestion state information and/or the congestion control operation information through a system broadcast message or an RRC connection reconfiguration message; when the second network node is the MCE, the base station or the base station type RSU sends the congestion state information through an MBMS load notification message; when the second network node is a neighboring base station or a neighboring base station type RSU of the first network node, the base station or the base station type RSU sends the congestion status information through a message of at least one of: an X2 interface establishment request message, an X2 interface establishment response message, a load information message, a base station configuration update confirmation message, a resource state response message and a resource state update message.

Further, before the first network node sends congestion status information and/or congestion control operation information to the second network node, the method further comprises: the base station or base station type RSU or the MCE identifies the V2X MBMS bearer by at least one of the following modes: MBMS bearer assigned to a specified TMGI identity for V2X service; newly added MBMS load bearing corresponding to the delay sensitive QCI value used for the V2X service; and carrying the MBMS bearer by the time delay sensitive service indication mark carried in the MBMS conversation starting request message.

Further, after the first network node sends congestion status information and/or congestion control operation information to the second network node, the method further comprises: the first network node sends congestion status update information to the second network node.

Further, the manner of triggering the first network node to send the congestion status information or the congestion status update information comprises at least one of: the transmission is triggered periodically and is transmitted when the congestion state changes.

According to yet another aspect of the present invention, there is provided a method for vehicle networking traffic congestion control, comprising: when the air interface is congested, the second network node sends congestion state information to the first network node; and the second network node receives the congestion control operation information sent by the first network node and controls the Internet of vehicles service according to the congestion control operation information.

Further, when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU, and the second network node is a UE or a UE type RSU.

Further, the congestion status information comprises at least one of: information indicating congestion of the interface of the PC5, information indicating congestion degree of the interface of the PC5, wherein the congestion state information is transmitted through sidelink user information or RRC message.

Further, the congestion control operation information includes at least one of: PC5 interface communication resource configuration information, information for indicating a decrease in the transmission frequency of PC5 interface periodic V2X information, information for indicating a transmission frequency level of PC5 interface periodic V2X information, an indication to start/pause transmission of PC5 interface V2X periodic messages, configuration information of validity time, priority, traffic type, configuration information of a semi-static resource period of V2X traffic of PC5 interface; the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and the mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or V2X data preferentially uses mode1 resources, if there are multiple priority data simultaneously, then the high priority preferentially uses mode1 resources.

Further, before the second network node sends congestion status information to the first network node, the method further comprises: the second network node detects congestion at the PC5 interface by at least one of: the second network node detects that the power intensity and/or the signal intensity of the resource pool are/is lower than a first preset threshold value; the second network node receives the side link control information, but the data analysis is unsuccessful; and the second network node detects that the signal intensity value of the resource pool is higher than a second preset threshold, but the data receiving rate is smaller than a third preset threshold.

Further, when the second network node does not receive the PC5 interface congestion control operation information sent by the base station after detecting the PC5 interface congestion, the method further comprises: the second network node relieves PC5 interface congestion by autonomous adjustment of at least one of: the second network node informing a V2X application layer PC5 interface of congestion, wherein the V2X application layer decides whether to reduce a period of generating/transmitting a V2X message according to the congestion status information; the second network node preferentially transmits high priority V2X data on resources of V2X periodic messages or normal cellular messages; and the V2X application layer or the PDCP layer or the RLC layer of the second network node performs V2X data packet compression, merging and discarding processing according to the V2X message type, the service/application type and the priority.

Further, after the second network node sends the congestion status information to the first network node, the method further includes: the second network node sends congestion status update information to the first network node.

Further, the manner of triggering the second network node to send the congestion status information or the congestion status update information comprises at least one of: the transmission is triggered periodically and is transmitted when the congestion state changes.

According to yet another aspect of the present invention, there is provided a method for vehicle networking traffic congestion control, comprising: when an air interface is congested, a first network node receives congestion state information sent by a second network node; and the first network node sends congestion control operation information to a second network node according to the congestion state information, wherein the congestion control operation information is the basis of the second network node for controlling the Internet of vehicles service.

Further, the congestion status information comprises at least one of: information indicating congestion at the PC5 interface, information indicating the degree of congestion at the PC5 interface.

Further, the congestion control operation information includes at least one of: PC5 interface communication resource configuration information, information for indicating a decrease in the transmission frequency of PC5 interface periodic V2X information, information for indicating a transmission frequency level of PC5 interface periodic V2X information, an indication to start/pause transmission of PC5 interface V2X periodic messages, configuration information of validity time, priority, traffic type, configuration information of a semi-static resource period of V2X traffic of PC5 interface; the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and the mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or the V2X data preferentially uses the mode1 resource, if a plurality of priority data exist at the same time, the mode1 resource is preferentially used by high priority; the congestion control operation information is transmitted through a system broadcast message or an RRC connection reconfiguration message.

According to another aspect of the present invention, there is provided an apparatus for controlling congestion of traffic in car networking, applied to a second network node side, including: a first receiving module, configured to receive congestion state information and/or congestion control operation information sent by a first network node when an air interface is congested; and the control module is used for controlling the Internet of vehicles service by the node according to the congestion state information and/or congestion control operation information.

According to still another aspect of the present invention, there is provided an apparatus for controlling congestion of traffic in internet of vehicles, applied to a first network node side, including: a first sending module, configured to send congestion state information and/or congestion control operation information to the second network node when the air interface is congested.

According to another aspect of the present invention, there is provided an apparatus for controlling congestion of traffic in car networking, applied to a second network node side, including: a second sending module, configured to send congestion state information to the first network node when the air interface is congested; and the second receiving module is used for receiving congestion control operation information sent by the first network node, wherein the congestion control operation information is a basis for controlling the Internet of vehicles service by the second network node.

According to another aspect of the present invention, there is provided an apparatus for controlling congestion of traffic in internet of vehicles, applied to a first network node side, including: a third receiving module, configured to receive congestion state information sent by a second network node when an air interface is congested; and the third sending module is used for sending congestion control operation information to a second network node according to the congestion state information, wherein the congestion control operation information is a basis for the second network node to control the Internet of vehicles service.

According to the invention, when the air interface is congested, the second network node receives the congestion state information and/or congestion control operation information sent by the first network node, and the second network node controls the Internet of vehicles service according to the congestion state information and/or congestion control operation information, so that when the air interface is congested, the Internet of vehicles service can be controlled through the congestion state information and/or congestion control operation information by the network node, and the pressure of the air interface service is relieved, thereby solving the problems that in the related art, when the vehicle runs slowly, the vehicle density is high, and when the frequency of sending V2X messages by the vehicle is high, the traffic congestion of the air interface or the V2X of the PC5 interface is caused.

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 diagram of a V2X service scenario in the related art;

FIG. 2 is a flowchart of a method for vehicle networking traffic congestion control according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method of vehicle networking traffic congestion control according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for controlling congestion of car networking services according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method of vehicle networking traffic congestion control, four, according to an embodiment of the present invention;

FIG. 6 is a block diagram of a device for congestion control of Internet of vehicles traffic according to an embodiment of the present invention;

FIG. 7 is a block diagram of a device for congestion control of Internet of vehicles services according to an embodiment of the present invention;

FIG. 8 is a block diagram of a device for congestion control of Internet of vehicles traffic according to an embodiment of the present invention;

FIG. 9 is a block diagram of an apparatus for vehicle networking traffic congestion control according to an embodiment of the present invention;

FIG. 10 is a first schematic diagram of a vehicle networking congestion control according to an alternative embodiment of the present invention;

FIG. 11 is a diagram of a vehicle networking congestion control flow diagram two in accordance with an alternative embodiment of the present invention;

fig. 12 is a flowchart of a method for a V2X application server to alleviate congestion in a congested state in accordance with an alternative embodiment of the present invention;

fig. 13 is a flowchart of a method for a UE to relieve congestion in a congested state according to an alternative embodiment of the present invention;

fig. 14 is a flowchart of a manner in which congestion status information is sent over port X2, according to an alternative embodiment of the present invention;

fig. 15 is a flowchart of a method for reducing broadcast area using SC-PTM in a congested state in accordance with an alternative embodiment of the present invention;

fig. 16 is a flowchart of a method for the eNB/MCE to identify a V2X bearer, according to an alternative embodiment of the invention;

fig. 17 is a flowchart one of a PC5 interface congestion control method according to an alternative embodiment of the invention;

fig. 18 is a flow chart diagram two of a PC5 interface congestion control method according to an alternative embodiment of the 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 method for controlling traffic congestion of internet of vehicles is provided, and fig. 2 is a first flowchart of a method for controlling traffic congestion of internet of vehicles according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:

step S202: when the air interface is congested, the second network node receives congestion state information and/or congestion control operation information sent by the first network node;

step S204: and the second network node controls the Internet of vehicles service according to the congestion state information and/or the congestion control operation information.

In the above step S202 and step S204 of this embodiment, when the air interface is congested, the second network node receives the congestion state information and/or the congestion control operation information sent by the first network node, and the second network node controls the car networking traffic according to the congestion state information and/or the congestion control operation information, and it can control the car networking traffic through the congestion state information and/or the congestion control operation information when the air interface is congested, so as to relieve the pressure of the air interface traffic, thereby solving the problem in the related art that when the vehicle driving speed is slow, the vehicle density is high, and the frequency of sending the V2X message by the vehicle is high, the traffic congestion of the air interface or the V2X of the PC5 interface is caused.

In an optional implementation manner of this embodiment, the air interface involved in this embodiment may be a Uu port, and when the air interface is the Uu port, the first network node involved in this embodiment is a base station or a base station type roadside unit, and the second network node includes at least one of the following: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of a first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a Broadcast Multicast Service Center (BM-SC for short), and a vehicle networking V2X application server. It should be noted that the above-mentioned air interface Uu is only used for illustration, and other air interfaces are also applicable to the present invention, and of course, different air interfaces correspond to different network nodes, and after the air interfaces are determined, the specific devices of the network nodes may be determined accordingly according to the functions of the network nodes in the above-mentioned steps.

Based on this, the congestion status information involved in this embodiment at least includes at least one of the following: uu port uplink congestion state information and Uu port downlink congestion state information; wherein, the Uu port uplink congestion state information includes at least one of the following: information indicating congestion, information indicating a degree of congestion; the Uu port downlink congestion state information comprises at least one of the following information: information for indicating congestion, information for indicating a degree of congestion, congestion traffic type information, congestion status information for each broadcast traffic channel, congestion status information for each cell under control of the first network node.

And the congestion control operation information may include at least one of: information for indicating Uu port congestion control operation, information for indicating a decrease in V2X periodic message transmission frequency, information for indicating a frequency level at which V2X messages are transmitted, configuration information of a semi-static resource period of V2X traffic, an indication to start/pause transmission of V2X periodic messages, configuration information of validity time, priority, and traffic type, configuration information specifying application congestion control parameters, configuration information of PDCP packet loss timer carried by V2X.

For the different second network nodes mentioned above, in an optional implementation manner of this embodiment, when the second network node is a UE or a UE type RSU, the manner that the second network node controls the car networking service according to the congestion control operation information in step S204 mentioned in this embodiment may be implemented by the following manner:

the first method is as follows: the UE or the UE type RSU reduces the transmission frequency of the V2X periodic messages, or reduces the transmission frequency level of the V2X messages, or transmits the V2X service according to the configuration information of the semi-static resource period of the V2X service, or according to the indication of starting/suspending the transmission of the V2X periodic messages, the effective time, the priority and the configuration information of the service type;

the second method comprises the following steps: when a UE or UE type RSU high layer initiates establishment of Radio Resource Control (RRC) connection due to transmission of V2X application data, a UE or UE type RSU access layer detects whether the RRC connection is limited by configuration parameters of specified application congestion control parameters; when the access layer is limited by the configuration information of the specified application congestion control parameter, the UE or the UE type RSU terminates the establishment of RRC connection;

the third method comprises the following steps: and the UE or the UE type RSU carries out packet loss operation of V2X data according to a configured packet data convergence protocol PDCP packet loss timer carried by V2X.

In yet another optional implementation manner of this embodiment, when the second network node is a UE or a UE-type RSU, the manner of controlling the car networking service by the second network node according to the congestion status information in step S204 involved in this embodiment includes at least one of the following:

the first method is as follows: the UE or UE type RSU notifies the V2X application layer of congestion status information, wherein the V2X application layer decides whether to reduce the period of generating/sending V2X messages according to the congestion status information;

the second method comprises the following steps: the UE or the UE type RSU sends high-priority V2X data on the resources of periodic messages or common cellular messages preferentially according to the congestion state information;

the third method comprises the following steps: and the UE or the UE type RSU reports expected packet data convergence protocol PDCP packet loss timer configuration to the base station according to the congestion state information.

In yet another optional implementation manner of this embodiment, when the second network node is an MCE, the manner that the second network node controls the car networking service according to the congestion state information in step S204 in this embodiment may be implemented by:

the MCE converts the Temporary Mobile Group Identification (TMGI) service broadcasted in a Multicast Broadcast Single Frequency Network (MBSFN) mode into a mode of broadcasting from a single cell point to multiple points (SC-PTM); wherein, the MCE sends the SC-PTM information to the first network node through an MBMS conversation starting request message or an MBMS conversation updating request message.

In yet another optional implementation manner of this embodiment, when the second network node is a BM-SC or V2X application server, the manner that the second network node controls the car networking service according to the congestion state information includes: the BM-SC or V2X application server merges or discards V2X packets according to V2X service type, priority, transmission period, etc.

Fig. 3 is a flowchart of a method for controlling traffic congestion of the internet of vehicles according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:

step S302: a first network node detects an air interface;

step S304: upon detecting air interface congestion, the first network node sends congestion status information and/or congestion control operation information to the second network node.

It should be noted that the first network node in fig. 3 corresponds to the second network node in fig. 2;

in this embodiment, when the air interface is Uu, the first network node is a base station or a base station type road side unit RSU, and the second network node includes at least one of the following: the system comprises user equipment UE, a user equipment UE type roadside unit, a neighboring base station of a first network node, a neighboring base station type RSU of the first network node, a multi-cell/multicast coordination entity MCE, a broadcast multicast service center BM-SC and an application server of the Internet of vehicles V2X.

Based on this, the congestion status information involved in this embodiment at least includes at least one of the following: the Uu port uplink congestion state information comprises at least one of the following information: information indicating congestion, information indicating a degree of congestion; the Uu port downlink congestion state information comprises at least one of the following information: information for indicating congestion, information for indicating a degree of congestion, congestion traffic type information, congestion status information for each broadcast traffic channel, congestion status information for each cell under control of the first network node.

And the congestion control operation information comprises at least one of: information for indicating Uu port congestion control operation, information for indicating a decrease in V2X periodic message transmission frequency, information for indicating a frequency level at which V2X messages are transmitted, configuration information of a semi-static resource period of V2X traffic, an indication to start/pause transmission of V2X periodic messages, configuration information of validity time, priority, and traffic type, configuration information specifying application congestion control parameters, configuration information of PDCP packet loss timer carried by V2X.

In yet another optional implementation manner of this embodiment, when the second network node is a UE or a UE-type RSU, the base station or the base station-type RSU sends congestion state information and/or congestion control operation information through a system broadcast message or an RRC connection reconfiguration message; and when the second network node is the MCE, the base station or the base station type RSU sends the congestion state information through the MBMS load notification message.

In yet another optional implementation manner of this embodiment, when the second network node is a neighboring base station or a neighboring base station type RSU of the first network node, the base station or the base station type RSU sends the congestion status information through a message of at least one of the following: an X2 interface establishment request message, an X2 interface establishment response message, a load information message, a base station configuration update confirmation message, a resource state response message and a resource state update message.

In yet another optional implementation manner of this embodiment, before the first network node sends the congestion state information and/or the congestion control operation information to the second network node, the method further includes: the base station or base station type RSU or MCE identifies the V2X MBMS bearer by means of at least one of: MBMS bearer assigned to a specified TMGI identity for V2X service; newly added MBMS load bearing corresponding to the delay sensitive QCI value used for the V2X service; and carrying the MBMS bearer by the time delay sensitive service indication mark carried in the MBMS conversation starting request message.

In yet another optional implementation manner of this embodiment, after the first network node sends the congestion state information and/or the congestion control operation information to the second network node, the method further includes: the first network node sends congestion status update information to the second network node. The method for triggering the base station to send the congestion state information or the congestion state update information comprises at least one of the following steps: the transmission is triggered periodically and is transmitted when the congestion state changes.

Fig. 4 is a flowchart of a method for controlling congestion of traffic in the internet of vehicles according to an embodiment of the present invention, as shown in fig. 4, the method includes the steps of:

step S402: the second network node detects the air interface;

step S404: congestion state information sent by the second network node to the first network node when the air interface is congested;

step S406: and the second network node receives the congestion control operation information sent by the first network node and controls the Internet of vehicles service according to the congestion control operation information.

It should be noted that fig. 4 relates to an embodiment similar to fig. 2 and 3, and unlike the embodiment of fig. 2 and 3, the first network node is used for detecting the air interface, and the second network node is used in fig. 4, but the problem is solved in a similar manner, and the car networking service is controlled through the congestion state information and/or the congestion control operation information.

In an optional implementation manner of this embodiment, when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU, and the second network node is a UE or a UE type RSU.

Based on this, the congestion status information involved in this embodiment includes at least one of: information indicating congestion of the interface of the PC5, information indicating congestion degree of the interface of the PC5, wherein the congestion state information is transmitted through sidelink user information or RRC message.

And for the congestion control operation information involved in this embodiment, the congestion control operation information includes at least one of: PC5 interface communication resource configuration information, information for indicating a decrease in the transmission frequency of PC5 interface periodic V2X information, information for indicating a transmission frequency level of PC5 interface periodic V2X information, an indication to start/pause transmission of PC5 interface V2X periodic messages, configuration information of validity time, priority, traffic type, configuration information of a semi-static resource period of V2X traffic of PC5 interface; the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or V2X data preferentially uses mode1 resources, if there are multiple priority data simultaneously, then the high priority preferentially uses mode1 resources. Wherein, the mode1 resource is a special resource allocated for the UE, and the base station allocates a proper V2X/ProSe resource for the UE according to the request of the UE; the mode2 resource is a resource acquired based on a contention mode, and one or more V2X/ProSe (proximity services) resource pools are generally pre-allocated by a base station or a system, and UEs participating in V2X/ProSe discovery/communication listen to the resource pools and acquire transmission resources in a contention mode.

In an optional implementation manner of this embodiment, before the second network node sends the congestion status information to the first network node, the method of this embodiment further includes: the second network node detects congestion at the PC5 interface by at least one of: the second network node detects that the power intensity and/or the signal intensity of the resource pool are/is lower than a first preset threshold value; the second network node receives the side link control information, but the data analysis is unsuccessful; the second network node detects that the resource pool signal strength value is higher than a second preset threshold, but the data receiving rate is smaller than a third preset threshold.

After the second network node detects the congestion of the PC5 interface or does not receive the congestion control operation information of the PC5 interface sent by the base station, the method of this embodiment further includes: the second network node relieves PC5 interface congestion by autonomous adjustment of at least one of: the second network node informs the V2X application layer of the occurrence of congestion on the PC5 interface, wherein the V2X application layer decides whether to reduce the period of generating/sending V2X messages according to the congestion state information; the second network node preferentially transmits high priority V2X data on the resources of V2X periodic messages or normal cellular messages; the V2X application layer or PDCP layer or RLC layer of the second network node performs V2X packet compression, merging, discarding processing according to V2X message type, service/application type, priority.

And after the second network node sends the congestion status information to the first network node, the method of this embodiment further includes: the second network node sends congestion status update information to the first network node. Wherein the manner of triggering the second network node to send the congestion status information or the congestion status update information comprises at least one of: the transmission is triggered periodically and is transmitted when the congestion state changes.

Fig. 5 is a flowchart of a method for traffic congestion control in a vehicle networking system according to an embodiment of the present invention, as shown in fig. 5, the method includes the steps of:

step S502, when the second network node detects the air interface congestion, the first network node receives the congestion state information sent by the second network node;

step S504: and the first network node sends congestion control operation information to the second network node according to the congestion state information, wherein the congestion control operation information is the basis for the second network node to control the Internet of vehicles service.

It should be noted that the first network node in fig. 5 corresponds to the second network node in fig. 4.

In an alternative implementation of this embodiment, the UE detects the PC5 interface congestion by: UE detects the power intensity and signal intensity of a resource pool; or the UE receives the side link control information but the data analysis is unsuccessful; or the UE detects that the resource pool signal is good but the data reception rate is not high.

Based on this, the congestion status information related to the present embodiment includes at least one of: information indicating congestion at the PC5 interface, information indicating the degree of congestion at the PC5 interface.

And the congestion control operation information comprises at least one of: PC5 interface communication resource configuration information, information for indicating a decrease in the transmission frequency of PC5 interface periodic V2X information, information for indicating a transmission frequency level of PC5 interface periodic V2X information, an indication to start/pause transmission of PC5 interface V2X periodic messages, configuration information of validity time, priority, traffic type, configuration information of a semi-static resource period of V2X traffic of PC5 interface; the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or V2X data preferentially uses mode1 resources, if there are multiple priority data simultaneously, then the high priority preferentially uses mode1 resources. Wherein the congestion control operation information is transmitted through a system broadcast message or an RRC connection reconfiguration message.

In another optional implementation manner of this embodiment, after the UE detects the congestion of the PC5 interface or does not receive the congestion control operation information of the PC5 interface sent by the base station, the UE may relieve the congestion of the PC5 interface in an autonomous adjustment manner as follows: the UE informs the V2X application layer of congestion of a PC5 interface, and the V2X application layer further determines whether to reduce the generation/transmission period of the V2X message; or the UE preferentially sends or preempts the resources of the V2X periodic messages to send the high-priority V2X data; or the V2X application layer or PDCP layer or RLC layer of the UE performs V2X packet compression, merging, discarding, etc. according to V2X message type, service/application type, priority, etc.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can 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 (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as 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 device for controlling congestion of a service in an internet of vehicles is also provided, where the device is used to implement the foregoing embodiment and the preferred embodiments, and details are not repeated after the description is given. 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. 6 is a block diagram of a first structure of an apparatus for controlling congestion of traffic in internet of vehicles according to an embodiment of the present invention, where the apparatus is applied to a second network node side, and as shown in fig. 6, the apparatus includes: a first receiving module 62, configured to receive congestion state information and/or congestion control operation information sent by a first network node when the first network node detects air interface congestion; and the control module 64 is coupled with the first receiving module 62 and is used for controlling the internet of vehicles service by the node according to the congestion state information and/or the congestion control operation information.

Optionally, when the air interface is Uu, the first network node is a base station or a base station type roadside unit, and the second network node includes at least one of: the system comprises user equipment UE, a user equipment UE type roadside unit, a neighboring base station of a first network node, a neighboring base station type RSU of the first network node, a multi-cell/multicast coordination entity MCE, a broadcast multicast service center BM-SC and an application server of the Internet of vehicles V2X.

Fig. 7 is a block diagram of a structure of an apparatus for controlling congestion of car networking services according to an embodiment of the present invention, where the apparatus is applied to a first network node side, as shown in fig. 7, and includes: a first detection module 72, configured to detect an air interface; a first sending module 74, coupled to the first detecting module 72, is configured to send the congestion status information and/or the congestion control operation information to the second network node when the air interface congestion is detected.

It should be noted that the first detection module 72 is an optional module in this embodiment, and may be omitted or omitted in a specific implementation, and may also be used for further improvement of the scheme.

Optionally, when the air interface is Uu, the first network node is a base station or a base station type road side unit RSU, and the second network node includes at least one of: the system comprises user equipment UE, a user equipment UE type roadside unit, a neighboring base station of a first network node, a neighboring base station type RSU of the first network node, a multi-cell/multicast coordination entity MCE, a broadcast multicast service center BM-SC and an application server of the Internet of vehicles V2X.

It should be noted that the embodiments of the apparatus in fig. 6 and fig. 7 correspond to the embodiments of the method in fig. 2 and fig. 3.

Fig. 8 is a block diagram of a third apparatus for controlling congestion of traffic in car networking, which is applied to a second network node side, according to an embodiment of the present invention, and as shown in fig. 8, the apparatus includes: a second detection module 82, configured to detect an air interface; a second sending module 84, coupled to the second detecting module 82, configured to send congestion status information to the first network node when the air interface is congested; and a second receiving module 86, coupled to the second sending module 84, configured to receive congestion control operation information sent by the first network node, where the congestion control operation information is a basis for controlling the internet of vehicles service by the second network node.

It should be noted that the second detection module 82 is an optional module in this embodiment, and may be omitted or omitted in a specific implementation, and may also be used for further improvement of the scheme.

Optionally, when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU, and the second network node is a UE or a UE type RSU.

Fig. 9 is a block diagram of a device for controlling congestion of traffic in car networking, according to an embodiment of the present invention, the device is applied to a first network node side, as shown in fig. 9, and the device includes: a third receiving module 92, configured to receive congestion state information sent by the second network node when the second network node detects that the air interface is congested; and a third sending module 94, coupled to the third receiving module 92, configured to send congestion control operation information to the second network node according to the congestion state information, where the congestion control operation information is a basis for the second network node to control the internet of vehicles service.

It should be noted that the embodiments of the apparatus in fig. 8 and 9 correspond to the embodiments of the method in fig. 4 and 5.

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

The invention will now be illustrated with reference to an alternative embodiment thereof;

in this optional embodiment, a base station may send congestion state information and/or congestion control operation information of an air interface to vehicle UE or RSU or a Multi-cell/multicast Coordination Entity (MCE for short) or an adjacent base station or a V2X application server, and a network node that receives the congestion state information and/or the congestion control operation information performs a congestion control operation to reduce data sent to the air interface; and the vehicle UE can report the congestion state information of the PC5 interface to the base station, and the base station configures the congestion control operation of the PC5 interface, so that the congestion conditions of air interfaces and the traffic of the Internet of vehicles with the PC5 interface are effectively controlled and relieved, and meanwhile, the data of the V2X with high priority is ensured to be transmitted smoothly in time.

In the following, a specific implementation of a method for controlling and relieving traffic congestion of an internet of vehicles in this optional embodiment is described, fig. 10 is a first schematic diagram of congestion control of an internet of vehicles according to an optional embodiment of the present invention, where the method is used for congestion of a Uu interface, as shown in fig. 10, and the steps of the method may include:

step S1002: a base station detects the congestion of a Uu port;

step S1004: the base station sends congestion state information and/or congestion control operation information to the UE and/or the UE type RSU or the adjacent base station or the MCE or the V2X application server;

step S1006: and the UE and/or the UE type RSU or the adjacent base station or the MCE or the V2X application server executes the congestion control operation according to the congestion state information and/or the congestion control operation information.

It should be noted that the congestion status information related in this optional embodiment may include: uu port uplink congestion state information or Uu port downlink congestion state information; wherein, the Uu port uplink congestion state information includes: congestion indication and/or congestion level such as low, medium, high or quantized level scalar values; and the Uu port downlink congestion state information includes: congestion indications, and/or congestion levels such as low, medium, high or quantized level scalar values, and/or congestion status of each broadcast traffic channel;

the congestion control operation information involved in this optional embodiment may include: uu port congestion control operation indication, an indication of reducing a V2X periodic message sending period, or an indication of a V2X message sending frequency level (such as low, normal, high), or a semi-static resource period configuration of V2X service, or an indication of starting/suspending sending V2X periodic messages, an effective time, a priority, a service type, or the like, or an application-specific congestion control parameter configuration, or a PDCP packet loss timer configuration carried by V2X;

as to the manner in which the base station related to step S404 in this optional embodiment sends the congestion state information and/or the congestion control operation information to the UE and/or the UE type RSU, the manner of sending the congestion state information and/or the congestion control operation information may be: sending congestion state information and/or congestion control operation information through a system broadcast message or an RRC connection reconfiguration message;

as to the manner involved in step S406 in this alternative example, the method in this alternative embodiment may be implemented as follows:

when the UE and/or the UE type RSU receives an indication that the Uu port congestion control operation information is to reduce the transmission period of the V2X periodic message, or an indication of a V2X message transmission frequency level (such as low, normal, high), or a semi-static resource period configuration of the V2X service, or start/suspend configurations such as an indication of transmitting the V2X periodic message, an effective time, a priority, a service type, and the like, the UE or the UE type RSU reduces the transmission period of the V2X periodic message or performs transmission of the V2X service according to the configuration information; or the like, or, alternatively,

when the UE receives the congestion control operation information of the Uu port and configures the congestion control parameters for specific application, and the high-level UE initiates RRC connection establishment due to the transmission of V2X application data, the access layer of the UE checks whether the congestion control parameters are limited by the congestion control parameters for the specific application, and if the congestion control parameters are limited, the RRC connection establishment is cancelled; or the like, or, alternatively,

when the UE receives the PDCP packet loss timer configuration carried by the V2X of the Uu port congestion operation configuration information, the UE performs packet loss operation of V2X data according to the configured PDCP packet loss timer value; or the like, or, alternatively,

when the UE receives the congestion state information of the Uu port, the UE informs the V2X application layer of the congestion, and the V2X application layer further determines whether to reduce the generation/transmission period of the V2X message; or the like, or, alternatively,

when the UE receives the congestion state information of the Uu port, the UE preferentially sends or occupies resources of periodic messages or common cellular messages to send high-priority V2X data; or the like, or, alternatively,

and when the UE receives the Uu port congestion state information, the UE reports the recommended PDCP packet loss timer configuration to the eNB.

The manner in which the base station related to this optional embodiment sends the congestion status information to the neighboring base station may be implemented as follows: the congestion status information may be sent through an X2 interface establishment request message, or an X2 interface establishment response message, or a load information message, or an eNB configuration update confirm message, or a resource status response message, or a resource status update message;

based on this, the method related to step S406 in this embodiment may be implemented in such a way that, after receiving the congestion state information, the neighboring base station may send the congestion state information to the UE through a broadcast message or an RRC connection reconfiguration message or configure congestion control operation information for the UE;

after the base station sends the congestion status information to the MCE in step S406, the optional implementation may further include: the MCE combines the congestion state, considers that TMGI service broadcasted by MBMS is converted into SC-PTM broadcast, and sends SC-PTM information to the base station through MBMS conversation starting request message or MBMS conversation updating request message; and after the base station sends the congestion status information to the V2X application server, the method may further include: after receiving the congestion state information, the V2X application server merges or discards the V2X data packets according to the V2X service type, priority, transmission period, and the like, thereby reducing the V2X data transmitted to the air interface.

Before the base station sends the congestion status information and/or the congestion operation configuration information to the UE or the UE type RSU or the neighboring base station or the MCE or the V2X application server, this optional embodiment may further include that the eNB/MCE identifies the V2XMBMS bearer by:

MBMS bearer of a special TMGI identity assigned to V2X service; or

Newly added MBMS load bearing corresponding to the delay sensitive QCI value used for the V2X service; or

Carrying MBMS by a delay sensitive service indication mark carried in an MBMS conversation starting request message;

fig. 11 is a flowchart of a congestion control flow chart ii for a vehicle networking according to an alternative embodiment of the present invention, the method is used for the PC5 interface congestion, as shown in fig. 11, and the steps of the method include:

step S1102: the UE detects that the PC5 interface is congested;

step S1104: the UE sends the congestion state information to the base station;

step S1106: the UE receives the congestion control operation information of the PC5 interface sent by the base station;

as to the above manner of sending the congestion status information to the base station by the UE in this optional embodiment, the method may be: the UE sends the congestion state information to the base station through sidelink user information (sidelink UE information); wherein the congestion status information comprises: an indication of PC5 interface congestion, and/or a degree of PC5 interface congestion such as a low, medium, high, or quantized level scalar value;

the congestion control operation information for the above mentioned PC5 interface includes: PC5 interface communication resource allocation; or an indication to decrease the periodic V2X message transmission period; or an indication of a transmission frequency level of the periodic V2X message, e.g., low, normal, high; or indications, valid time, priority, service type and the like for starting/suspending the transmission of the V2X periodic messages; or the configuration of semi-static resource periods of the V2X traffic of the PC5 interface.

The PC5 interface communication resource configuration comprises: mode1 and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules for the two types of resources. The usage rules of the resources, such as the configured priority threshold, for V2X data with priority higher than or equal to the threshold, send using mode1 resources, otherwise use contention type mode2 resources.

It should be noted that, in this optional embodiment, the congestion control operation information of the PC5 interface is sent through an RRC connection reconfiguration message; the UE receives the congestion control operation information of the PC5 interface configured by the base station and executes the operation according to the configuration;

example one

Since the density of vehicles in a cell is high, the driving speed of the vehicles is slow, and the frequency of sending the V2X message by the vehicle UE is high, air interface congestion may occur due to air interface resource limitation during downlink broadcasting. When the eNB detects congestion of an air interface, the eNB may tell the congestion state information to the V2X application server through the EPC, and the V2X application server merges or discards the V2X data packet according to the V2X service type, priority, transmission cycle, and the like, to reduce the V2X data sent to the air interface, thereby relieving congestion of the air interface, fig. 12 is a flowchart of a method for relieving congestion of the V2X application server in a congestion state according to an optional embodiment of the present invention, as shown in fig. 12, the method includes the steps of:

step S1202: after detecting the air interface congestion, the eNB sends congestion state information to a V2X application server through a core network;

the congestion status information includes a congestion status and/or a congestion degree.

Step S1204: after receiving the congestion state information, the V2X application server merges or discards the V2X data packets according to the V2X service type, priority, transmission period, etc. to reduce the V2X data transmitted to the air interface, thereby alleviating the congestion of the air interface.

Example two

When the eNB detects the air interface congestion, the eNB can tell the UE the congestion state information, and after the UE receives the congestion state indication, the UE reduces the data sent to the air interface and the network by some autonomous adjusting methods, so that the air interface network congestion is relieved. Fig. 13 is a flowchart of a method for a UE to relieve congestion in a congested state according to an alternative embodiment of the present invention, as shown in fig. 13, the method includes the steps of:

step S1302: the eNB sends congestion state information and/or congestion operation configuration information to the UE after detecting air interface congestion;

wherein the congestion status information and/or congestion operation configuration information is sent via a broadcast message or a proprietary signaling (e.g., RRC connection reconfiguration message);

the congestion operation configuration information comprises an instruction for reducing the sending period of the periodic information; or configuring a transmission frequency level (low, normal, high) of the periodic information; or configuring indication, effective time, priority, service type and the like for starting/suspending sending periodic messages; or configuring a semi-static resource period of the V2X service; or configuring the congestion control parameter of the specific application, and limiting the UE initiating the V2X service to access the network; or configuring a PDCP packet loss timer value carried by the V2X;

step S1304: after receiving the congestion state information and/or congestion operation configuration information, the UE executes congestion relieving operation;

if the UE receives congestion operation configuration information, such as an instruction for reducing the sending period of the periodic information, or configuring the sending frequency level (low, normal and high) of the periodic information, or configuring an instruction for starting/suspending sending of the periodic information, effective time, priority, service type and the like, or configuring a semi-static resource period of the V2X service, the UE sends the V2X service according to the configuration information; or the like, or, alternatively,

if the UE receives congestion operation configuration information, such as configuration of specific application congestion control parameters, when the UE high level initiates RRC connection establishment due to the transmission of V2X application data, the access layer of the UE checks whether the RRC connection establishment is limited by the specific application congestion control parameters, and if the RRC connection establishment is limited, the RRC connection establishment is cancelled; or the like, or, alternatively,

if the UE receives congestion operation configuration information, such as a PDCP packet loss timer value carried by the configuration V2X, the UE performs packet loss operation of V2X data according to the configured PDCP packet loss timer value; or the like, or, alternatively,

if the UE receives the congestion state information, the UE informs the V2X application layer that the air interface is congested, and the V2X application layer further determines whether to reduce the generation/transmission period of the V2X message; or the like, or, alternatively,

if the UE receives the congestion state information, the UE preferentially sends or occupies resources of periodic messages or common cellular messages to send high-priority V2X data; or the like, or, alternatively,

and if the UE receives the congestion state information, the UE reports the recommended PDCP packet loss timer configuration to the eNB.

EXAMPLE III

Since the broadcast area of a certain type of V2X service may be across base stations during downlink broadcast, when a base station detects that an air interface is congested, the base station may send congestion status information to an adjacent base station through an X2 interface, so that the adjacent base station also knows the congestion status. The base station and the neighboring base station may notify the congestion state information to the UE through a broadcast message or an RRC dedicated signaling, and may configure congestion control operation information for the UE to alleviate air interface congestion at the same time, fig. 14 is a flow chart of a manner of sending the congestion state information through an X2 port according to an alternative embodiment of the present invention, as shown in fig. 14, the method includes the steps of:

step S1402: after detecting the air interface congestion, the eNB1 sends congestion status information to the neighboring base station eNB2 through the X2 interface. Wherein the congestion status information comprises the congestion status and/or congestion degree of MBMS and/or SC-PTM. The congestion status information may be carried in an X2 interface setup request message, or an X2 interface setup response message, or a load information message, or an eNB configuration update confirm message, or a resource status response message, or a resource status update message, or other X2 interface messages.

Step S1404: after receiving the congestion status information sent by the neighboring base station eNB1, the eNB2 may indicate the congestion status to the UE or configure congestion control operation information for the UE through a broadcast message or a dedicated signaling. The specific method is as in example two.

It should be noted that the base station in this alternative embodiment may also be a base station type RSU.

Example four

The MBMS broadcast area is large and MBMS data using the same TMGI has the same MBMS service area and cell identity list. However, for the V2X scenario, usually only some UEs near the UE need to know the status of the UE, while the farther UEs do not need to know, and only for some V2X scenarios, such as a traffic accident somewhere, the farther UEs need to know to perform route planning in advance. And the authorized transmission range/current geographical location may be different for different UEs. Therefore, it may be considered for the V2X scenario to reduce the V2X message broadcast area, thereby reducing radio resource consumption to alleviate air interface congestion.

The single-cell point-to-multipoint broadcast SC-PTM is single-cell dynamic configuration and has more flexible broadcast area configuration compared with the MBMS. When BM-SC initiates MBMS conversation start request message, MCE can decide whether to use MBMS or SC-PTM broadcast mode. Then, when the eNB detects that the air interface is congested, the eNB sends the congestion status information to the MCE, and in order to save air interface resources, the MCE may decide to broadcast some TMGI services using the SC-PTM method and reduce the broadcast area. Fig. 15 is a flowchart of a method for reducing a broadcast area using SC-PTM in a congested state according to an alternative embodiment of the present invention, as shown in fig. 15, the method includes the steps of:

step S1502: the eNB detects the air interface congestion and sends congestion state information to the MCE;

step S1504: MCE receives congestion indication information of eNB, when there is MBMS conversation starting request message initiated by network side, MCE combines congestion state information, considering that some TMGI broadcast services are broadcasted by SC-PTM mode; or the MCE updates the TMGI service broadcasted by the MBMS mode into the TMGI service broadcasted by the SC-PTM mode;

step S1506: the MCE sends SC-PTM information carried by the MBMS conversation starting request message or the MBMS conversation updating request message to the eNB; and the eNB broadcasts the corresponding TMGI service by using an SC-PTM mode.

Step S1508: when the eNB detects that the air interface congestion is relieved or the congestion state changes, such as the congestion of a certain cell is relieved and other cells are congested, the eNB sends a congestion state updating message to the MCE. Furthermore, sending congestion status update messages may also be triggered periodically. So that the MCE knows the congestion status of the eNB and no longer takes congestion actions or changes the congestion policy.

EXAMPLE five

For downlink broadcast services, the eNB/MCE preferably can identify V2X broadcast services or normal broadcast services, and then the eNB can know whether air interface congestion is caused by excessive V2X service data or normal broadcast services, and decide which services to suspend when congestion occurs. Fig. 16 is a schematic diagram of eNB/MCE identifying a V2X bearer according to an alternative embodiment of the present invention, and as shown in fig. 16, information such as TMGI and QoS is carried in an MBMS session start request message initiated by BM-SC. The eNB/MCE identifies V2X traffic/bearers;

wherein, the specific part TMGI is used for allocating to the V2X service, and when the special TMGI is carried in the MBMS session start request message received by the eNB/MCE, the eNB/MCE may identify that the MBMS bearer is for the V2X service; or

Adding some new QCI values for the V2X service, and when the QoS parameter carried in the MBMS session start request message received by the eNB/MCE is the new QCI value for the V2X service, the eNB/MCE can identify that the MBMS bearer is for the V2X service; or

A delay-sensitive service indication is newly added in the MBMS session start request message to indicate a delay-sensitive service, such as a V2X service.

And after receiving the MBMS session starting request, the eNB schedules air interface wireless resources, establishes MBMS wireless bearer and prepares for sending MBMS data. When the MBMS service is excessive and the air interface radio resource for broadcasting is not enough, the eNB identifies that the V2X service is excessive or the general broadcast service is excessive, and sends the congestion status information to other nodes, such as UE, MCE, neighboring base stations, V2X application server, to help spreading the congestion information or implement congestion control, which is the specific method shown in embodiments one to four.

EXAMPLE six

The out-of-coverage UEs use the pre-configured PC5/sidelink resources for PC5 communication, the idle UEs use the PC5/sidelink resources broadcasted in the broadcast message for PC5 communication, and the connected UEs need to request the PC5 interface communication resources from the base station. The base station may choose to configure mode1 (scheduled resource) resources or mode 2(UE autonomous resource selection) resources for connected UEs.

In this embodiment, when the UE detects that the PC5 interface is congested, the UE reports congestion information of the PC5 interface to the base station, and the base station simultaneously allocates two types of resources, namely, mode1 and mode2, to the connected UE, configures a priority for a mode2 resource pool, and can configure a condition that the UE uses the two types of resources. Traffic with high priority (e.g., reaching a certain threshold), the UE transmits using mode1 resources configured by the base station, and traffic with low priority, the UE transmits using mode2 resources. Therefore, smooth sending of high-priority services is ensured in a congestion state. Fig. 17 is a flowchart of a first method for controlling congestion at an interface of PC5 according to an alternative embodiment of the present invention, where, as shown in fig. 17, the method includes the following steps:

step 1702: and when the UE detects that the interface of the PC5 is congested, reporting the congestion information of the interface of the PC5 to the base station. The PC5 congestion status information may be sent via sidelinkUEInformation message, or carried in other RRC messages.

Step S1704: when the UE1 or other connected-state UE2, etc. requests PC5 communication resources from the eNB, the eNB configures both mode1 and mode2 type resources for it at the same time, and configures one or more priorities for the mode2 resource pool, as well as usage rules for both types of resources. The usage rules of the resources, such as configured priority threshold, for V2X data with priority higher than or equal to the threshold, send using mode1 resources, otherwise use contention type mode2 resources.

Step S1706: and the eNB sends the resource configuration information to the UE. The resource configuration information is sent via an RRC connection reconfiguration message.

EXAMPLE seven

The present embodiment provides another way to alleviate congestion at the PC5 interface. When the UE detects that the PC5 interface is congested, the UE reports the congestion information of the PC5 interface to the base station, and the base station configures the PC5 interface to start/pause the sending of the periodic message through a broadcast message or a proprietary signaling, configures the sending period of the PC5 interface V2X message, or configures the sending frequency level of the PC5 interface V2X message to be low, normal or high. Fig. 18 is a second flowchart of a PC5 interface congestion control method according to an alternative embodiment of the present invention, as shown in fig. 18, the method includes the steps of:

step S1802: and when the UE detects that the interface of the PC5 is congested, reporting the congestion information of the interface of the PC5 to the base station. The PC5 congestion status information may be sent via sidelinkUEInformation message, or carried in other RRC messages.

Step 1804: and after receiving the PC5 interface congestion indication information, the eNB configures PC5 interface congestion control operation information. The PC5 interface congestion control operation information includes an indication to decrease the periodic V2X information transmission period; or the transmission frequency level of the periodic V2X message is low, normal, high; or configuring indication, effective time, priority, service type and the like for starting/suspending sending periodic messages; or configuring the semi-static resource period of the V2X traffic of the PC5 interface.

Step S1806: the base station transmits the PC5 interface congestion control operation information, which may be transmitted through a broadcast message or an RRC connection reconfiguration message.

After receiving the congestion control operation information of the PC5 interface, the UE sends V2X messages of the PC5 interface according to the configuration.

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:

step S1: when the first network node detects air interface congestion, the second network node receives congestion state information and/or congestion control operation information sent by the first network node;

step S2: and the second network node controls the Internet of vehicles service according to the congestion state information and/or the congestion control operation information.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

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 traffic congestion control in a vehicle networking system, comprising:

when the air interface is congested, the second network node receives congestion state information and/or congestion control operation information sent by the first network node;

the second network node controls the Internet of vehicles service according to the congestion state information and/or congestion control operation information;

the congestion status information comprises at least one of: uu port uplink congestion state information and Uu port downlink congestion state information; wherein the Uu port uplink congestion state information includes at least one of: information indicating congestion, information indicating a degree of congestion; the Uu port downlink congestion state information comprises at least one of the following information: information for indicating congestion, information for indicating a degree of congestion, congestion traffic type information, congestion status information for each broadcast traffic channel, congestion status information for each cell under control of the first network node;

the congestion control operation information comprises at least one of: information for indicating Uu port congestion control operation, information for indicating a decrease in V2X periodic message transmission frequency, information for indicating a frequency level at which V2X messages are transmitted, configuration information of a semi-static resource period of V2X traffic, an indication to start/pause transmission of V2X periodic messages, configuration information of validity time, priority, and traffic type, configuration information specifying application congestion control parameters, configuration information of PDCP packet loss timer carried by V2X.

2. The method of claim 1, wherein when the air interface is Uu, the first network node is a base station or a base station type wayside unit, and wherein the second network node comprises at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

3. The method of claim 1, wherein when the second network node is a UE or a UE-type RSU, the second network node controlling the car networking traffic according to congestion control operation information comprises:

the UE or the UE type RSU reduces the transmission frequency of V2X periodic messages, or reduces the transmission frequency level of V2X messages, or transmits V2X service according to the configuration information of semi-static resource period of V2X service, or according to the indication of starting/suspending the transmission of V2X periodic messages, the effective time, the priority and the configuration information of service type; or the like, or, alternatively,

when the UE or the UE type RSU high layer initiates the establishment of Radio Resource Control (RRC) connection due to the transmission of V2X application data, the UE or the UE type RSU access layer detects whether the UE or the UE type RSU access layer is limited by the configuration information of the specified application congestion control parameter; when the access layer is limited by the configuration information of the specified application congestion control parameter, the UE or the UE type RSU terminates the establishment of RRC connection; or the like, or, alternatively,

and the UE or the UE type RSU carries out packet loss operation of V2X data according to a configured packet data convergence protocol PDCP packet loss timer carried by V2X.

4. The method of claim 2, wherein when the second network node is a UE or a UE type RSU, the second network node controls the car networking traffic according to the congestion status information in a manner comprising at least one of:

the UE or UE type RSU notifies the V2X application layer of the congestion status information, wherein the V2X application layer decides whether to reduce the period of generating/transmitting V2X messages according to the congestion status information;

the UE or the UE type RSU sends high-priority V2X data on the resources of periodic messages or common cellular messages preferentially according to the congestion state information;

and the UE or the UE type RSU reports expected packet data convergence protocol PDCP packet loss timer configuration to the base station according to the congestion state information.

5. The method of claim 2, wherein when the second network node is the MCE, the second network node controlling the car networking traffic according to congestion status information comprises:

the MCE converts the Temporary Mobile Group Identifier (TMGI) service broadcasted in a Multicast Broadcast Single Frequency Network (MBSFN) mode into a mode of broadcasting from a single cell point to multiple points (SC-PTM); and the MCE sends the SC-PTM information to the first network node through an MBMS session starting request message or an MBMS session updating request message.

6. The method of claim 2, wherein when the second network node is the BM-SC or V2X application server, the second network node controlling the car networking traffic according to congestion status information comprises:

and the BM-SC or V2X application server merges or discards the V2X data packets according to the service type, priority and sending period of V2X.

7. A method for traffic congestion control in a vehicle networking system, comprising:

when the air interface is congested, the first network node sends congestion state information and/or congestion control operation information to the second network node;

8. The method according to claim 7, wherein when the air interface is Uu, the first network node is a base station or a base station type road side unit, RSU, and the second network node comprises at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

9. The method of claim 8,

when the second network node is a UE or a UE type RSU, the base station or the base station type RSU sends the congestion state information and/or the congestion control operation information through a system broadcast message or an RRC connection reconfiguration message;

when the second network node is the MCE, the base station or the base station type RSU sends the congestion state information through an MBMS load notification message;

when the second network node is a neighboring base station or a neighboring base station type RSU of the first network node, the base station or the base station type RSU sends the congestion status information through a message of at least one of: an X2 interface establishment request message, an X2 interface establishment response message, a load information message, a base station configuration update confirmation message, a resource state response message and a resource state update message.

10. The method according to claim 8, wherein before the first network node sends congestion status information and/or congestion control operation information to the second network node, the method further comprises:

the base station or base station type RSU or the MCE identifies the V2X MBMS bearer by at least one of the following modes:

MBMS bearer assigned to a specified TMGI identity for V2X service;

newly added MBMS load bearing corresponding to the delay sensitive QCI value used for the V2X service;

and carrying the MBMS bearer by the time delay sensitive service indication mark carried in the MBMS conversation starting request message.

11. The method according to claim 8, wherein after the first network node sends congestion status information and/or congestion control operation information to the second network node, the method further comprises:

the first network node sends congestion status update information to the second network node.

12. The method according to claim 8 or 11,

the manner of triggering the first network node to send the congestion status information or the congestion status update information comprises at least one of: the transmission is triggered periodically and is transmitted when the congestion state changes.

13. A method for traffic congestion control in a vehicle networking system, comprising:

when the air interface is congested, the second network node sends congestion state information to the first network node;

the second network node receives congestion control operation information sent by the first network node and controls the Internet of vehicles service according to the congestion control operation information;

the congestion status information comprises at least one of: information indicating congestion of a PC5 interface, information indicating congestion degree of a PC5 interface, wherein the congestion state information is transmitted through sidelink user information or RRC message;

the congestion control operation information comprises at least one of: PC5 interface communication resource configuration information, information for indicating a decrease in the transmission frequency of PC5 interface periodic V2X information, information for indicating a transmission frequency level of PC5 interface periodic V2X information, an indication to start/pause transmission of PC5 interface V2X periodic messages, configuration information of validity time, priority, traffic type, configuration information of a semi-static resource period of V2X traffic of PC5 interface;

the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and the mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or V2X data preferentially uses mode1 resources, if there are multiple priority data simultaneously, then the high priority preferentially uses mode1 resources.

14. The method according to claim 13, wherein when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU and the second network node is a UE or a UE type RSU.

15. The method of claim 14, wherein before the second network node sends the congestion status information to the first network node, the method further comprises:

the second network node detects congestion at the PC5 interface by at least one of:

the second network node detects that the power intensity and/or the signal intensity of the resource pool are/is lower than a first preset threshold value;

the second network node receives the side link control information, but the data analysis is unsuccessful;

and the second network node detects that the signal intensity value of the resource pool is higher than a second preset threshold, but the data receiving rate is smaller than a third preset threshold.

16. The method of claim 15, wherein after the second network node detects the PC5 interface congestion or does not receive the PC5 interface congestion control operation information sent by the base station, the method further comprises:

the second network node relieves PC5 interface congestion by autonomous adjustment of at least one of:

the second network node informing a V2X application layer PC5 interface of congestion, wherein the V2X application layer decides whether to reduce a period of generating/transmitting a V2X message according to the congestion status information;

the second network node preferentially transmits high priority V2X data on resources of V2X periodic messages or normal cellular messages;

and the V2X application layer or the PDCP layer or the RLC layer of the second network node performs V2X data packet compression, merging and discarding processing according to the V2X message type, the service/application type and the priority.

17. The method of claim 16, wherein after the second network node sends the congestion status information to the first network node, the method further comprises:

the second network node sends congestion status update information to the first network node.

18. The method of claim 16 or 17,

the manner of triggering the second network node to send the congestion status information or the congestion status update information comprises at least one of: the transmission is triggered periodically and is transmitted when the congestion state changes.

19. A method for traffic congestion control in a vehicle networking system, comprising:

when an air interface is congested, a first network node receives congestion state information sent by a second network node;

the first network node sends congestion control operation information to a second network node according to congestion state information, wherein the congestion control operation information is a basis for the second network node to control Internet of vehicles services;

the congestion status information comprises at least one of: information indicating congestion of the PC5 interface, information indicating a degree of congestion of the PC5 interface;

the PC5 interface communication resource configuration information includes: mode1 resources and mode2 resources, and the mode2 resource pool is configured with one or more priorities and usage rules of the mode1 and the mode2 resources; the usage rules of the resources are: when the V2X data priority is higher than or equal to the pre-configured priority threshold, using mode1 resources for transmission, and when the V2X data priority is less than the pre-configured priority threshold, using contention type mode2 resources; or the V2X data preferentially uses the mode1 resource, if a plurality of priority data exist at the same time, the mode1 resource is preferentially used by high priority;

wherein the congestion control operation information is transmitted through a system broadcast message or an RRC connection reconfiguration message.

20. The method according to claim 19, wherein when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU and the second network node is a UE or a UE type RSU.

21. A device for controlling traffic congestion of Internet of vehicles is applied to a second network node side, and is characterized by comprising:

a first receiving module, configured to receive congestion state information and/or congestion control operation information sent by a first network node when an air interface is congested;

the control module is used for controlling the Internet of vehicles service by the node according to the congestion state information and/or congestion control operation information;

22. The apparatus of claim 21, wherein when the air interface is Uu, the first network node is a base station or a base station type wayside unit, and wherein the second network node comprises at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

23. The utility model provides a device of car networking traffic congestion control, is applied to first network node side, its characterized in that includes:

a first sending module, configured to send congestion state information and/or congestion control operation information to a second network node when an air interface is congested;

24. The apparatus according to claim 23, wherein when the air interface is Uu, the first network node is a base station or a base station type road side unit, RSU, and the second network node comprises at least one of: the system comprises User Equipment (UE), a UE type roadside unit, a neighboring base station of the first network node, a neighboring base station type RSU of the first network node, a multi-cell/Multicast Coordination Entity (MCE), a broadcast multicast service center (BM-SC) and an Internet of vehicles (V2X) application server.

25. A device for controlling traffic congestion of Internet of vehicles is applied to a second network node side, and is characterized by comprising:

a second sending module, configured to send congestion state information to the first network node when the air interface is congested;

the second receiving module is used for receiving congestion control operation information sent by the first network node, wherein the congestion control operation information is a basis for controlling the internet of vehicles service by the second network node;

26. The apparatus of claim 25, wherein when the air interface is a PC5 interface, the first network node is a base station or a base station type RSU and the second network node is a UE or a UE type RSU.

27. The utility model provides a device of car networking traffic congestion control, is applied to first network node side, its characterized in that includes:

a third receiving module, configured to receive congestion state information sent by a second network node when an air interface is congested;

the third sending module is used for sending congestion control operation information to a second network node according to the congestion state information, wherein the congestion control operation information is the basis of the second network node for controlling the Internet of vehicles service;

28. The apparatus of claim 27, wherein when the air interface is a PC5 interface, the first network node is a base station or base station type RSU and the second network node is a UE or UE type RSU.