WO2017076097A1

WO2017076097A1 - Spatial multiplexing method, apparatus, and node for time-frequency resources of vehicle-road cooperation communication system

Info

Publication number: WO2017076097A1
Application number: PCT/CN2016/094647
Authority: WO
Inventors: 赵丽; 唐纪晔; 林琳; 房家奕
Original assignee: 电信科学技术研究院
Priority date: 2015-11-05
Filing date: 2016-08-11
Publication date: 2017-05-11
Also published as: CN106686653A; CN106686653B

Abstract

The present disclosure provides a spatial multiplexing method, apparatus, and node for time-frequency resources of a vehicle-road cooperation communication system. The method comprises: receiving interference information sent by a first node in a vehicle-road cooperation communication system after detecting a subframe collision, the interference information comprising a subframe collision position and a subframe receiving condition at the collision position; determining, according to the subframe collision position, interference nodes of sending signals at the collision position, and determining node distances between the interference nodes and between the first node and the interference nodes; and adjusting a spatial multiplexing distance threshold of the vehicle-road cooperation communication system or time-frequency resources of the interference nodes according to the subframe receiving condition and the node distances.

Description

Method, device and node for spatial multiplexing of time-frequency resources of vehicle road cooperative communication system

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201510746762.0, filed on Jan. 5, 2015, the entire content of

Technical field

The present disclosure relates to a vehicle road cooperative communication system, and in particular to a spatial multiplexing method, device and node for a time-frequency resource of a vehicle road cooperative communication system.

Background technique

Vehicle-way collaboration is a technology that uses wireless communication and a new generation of Internet to implement real-time information interaction between vehicles and vehicles, and to carry out active safety control and road coordination management based on full-time dynamic traffic information collection and integration. Fully realize the effective coordination of people and vehicles, ensure traffic safety, improve traffic efficiency, and form a safe, efficient and environmentally friendly road traffic system.

The vehicle-road cooperative communication system needs to realize the low delay and high reliability characteristics of the road safety application, and under the premise of satisfying the interference control and ensuring the reliability of the reception, the spatial multiplexing distance can be set, when greater than the given space complex When using distance, multiple nodes simultaneously use the same time-frequency resource to transmit information (ie, spatial multiplexing of time-frequency resources in the vehicle system communication system) to improve system resource utilization.

Summary of the invention

The technical problem to be solved by the embodiments of the present disclosure is to provide a spatial multiplexing method, device and node for time-frequency resources of a road-to-road cooperative communication system, which are used for adjusting spatial multiplexing distance or time-frequency resources according to node interference conditions, and improving The utilization of system time-frequency resources.

According to an aspect of an embodiment of the present disclosure, a spatial multiplexing method for time-frequency resources of a road-to-road cooperative communication system is provided, including:

Receiving, by the first node in the vehicle road cooperative communication system, interference information that is sent after detecting a collision of a subframe, where the interference information includes a collision location of the subframe and a subframe reception situation at the collision location;

Determining the interfering node transmitting the signal at the collision location according to the collision position of the subframe, and determining Determining the distance between the interfering nodes and between the first node and the interfering node;

And adjusting a spatial multiplexing distance threshold of the road cooperative communication system or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.

Optionally, in the foregoing solution, the determining a node distance between the interference node and the first node includes:

Obtaining, by each of the interfering nodes and the node location information of the first node, calculating, according to the acquired node location information, a node distance between the interfering nodes and between the first node and the interfering node, and determining a distance from the first node in the interfering node The nearest first interference node.

Optionally, in the foregoing solution, the determining, according to the receiving situation of the subframe and the distance of the node, adjusting a time-frequency resource of the interference node or adjusting a spatial multiplexing distance threshold of the time-frequency resource of the road-to-vehicle cooperative communication system, including:

When the subframe reception status indicates that the subframe reception fails, or the subframe reception status indicates that the subframes of the other interference nodes other than the first interference node are successfully received, it is determined whether the node distance between the interference nodes is greater than the space. Multiplexing distance threshold;

When the node distance between any two interfering nodes is not greater than the spatial multiplexing distance threshold, the other interfering nodes outside the first interfering node are allocated time-frequency resources different from the first interfering node;

When the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, the spatial multiplexing distance threshold is increased. .

Optionally, in the foregoing solution, the allocating different time-frequency resources from the first interfering node to the other interfering nodes, including: according to the distance between the other interfering nodes and spatial multiplexing A distance threshold for allocating time-frequency resources to the other interfering nodes.

Optionally, in the foregoing solution, the determining, according to the subframe receiving situation and the node distance, adjusting a time-frequency resource of the interference node or adjusting a spatial multiplexing distance threshold of the time-frequency resource of the road-to-vehicle cooperative communication system, and further including :

When the subframe reception condition indicates that the subframe of the first interference node is successfully received, the flow ends.

Optionally, in the foregoing solution, when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, the first node is further requested to report the received signal quality of each interfering node, according to the received by the first node. Signal quality, judging each interfering node received by the first node Whether the signal quality is inferior to the preset quality threshold.

According to another aspect of the embodiments of the present disclosure, a spatial multiplexing method for time-frequency resources of a road-to-road cooperative communication system is further provided, including:

Receiving, by the any node in the vehicle road cooperative communication system, the notification information sent after detecting the collision of the subframe, and counting the number of times of receiving the notification information in the preset spatial multiplexing distance adjustment period;

Determining whether the number of receptions exceeds a predetermined threshold;

When the number of receptions exceeds a predetermined threshold, the number of receptions is cleared, and the spatial multiplexing distance threshold of the road cooperative communication system is increased according to a predetermined step size.

Optionally, in the foregoing solution, if the number of times of receiving the statistics in the spatial multiplexing distance adjustment period is 0, the spatial multiplexing distance threshold is decreased according to a predetermined step size.

According to still another aspect of the embodiments of the present disclosure, a method for spatial multiplexing of time-frequency resources of a road-to-road cooperative communication system is provided, including:

a first node in the vehicle road cooperative communication system detects whether a receiving subframe collides;

When detecting that the receiving subframe collides, the first node determines a collision location of the subframe and a subframe reception situation at the collision location, and sends a collision location including the subframe and a subframe reception at the collision location to the scheduling platform. The interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.

Optionally, in the foregoing solution, the method further includes:

Receiving, by the first node, a request message sent by the scheduling platform for requesting reporting signal quality of each interfering node when the signal is sent at the collision location;

The first node detects the signal quality of each interference node according to the request message and sends the signal quality to the scheduling platform.

According to an aspect of an embodiment of the present disclosure, a scheduling platform of a road-to-road cooperative communication system is further provided, including:

a receiving module, configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception status at the collision location ;

a determining module, configured to determine, according to a collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node;

And an adjusting module, configured to adjust a spatial multiplexing distance threshold or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.

Optionally, in the foregoing solution, the determining module is specifically configured to obtain information about node locations of each interference node and the first node, and calculate interference nodes, and the first node and the interference node according to the acquired node location information. The inter-node distance and determine the first interfering node in the interfering node that is closest to the first node.

Optionally, in the foregoing solution, the adjusting module includes:

a determining module, configured to: when the subframe receiving situation indicates that the subframe receives the failure, or the subframe receiving situation indicates that the subframe of the other interfering node other than the first interfering node is successfully received, determining between the interfering nodes Whether the node distance is greater than the spatial multiplexing distance threshold;

a first processing module, when the node distance between any two interference nodes is not greater than the spatial multiplexing distance threshold, when the other interference nodes outside the first interference node are allocated different times from the first interference node, Frequency resource

a second processing module, configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, increase The spatial multiplexing distance threshold.

Optionally, in the above solution, the first processing module is specifically configured to allocate time-frequency resources to the other interfering nodes according to the distance between the other interfering nodes and the spatial multiplexing distance threshold.

Optionally, in the foregoing solution, the adjusting module further includes:

And a third processing module, configured to perform no action when the subframe reception status indicates that the subframe of the first interference node is successfully received.

Optionally, in the foregoing solution, the second processing module is further configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, request the first node to report the received signal of each interfering node. The quality, according to the received signal quality reported by the first node, determines whether the signal quality of each interference node received by the first node is inferior to the preset quality threshold.

According to another aspect of an embodiment of the present disclosure, a scheduling platform for a vehicle road cooperative communication system is provided, including:

a receiver, configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision position of the subframe and the collision location Subframe reception situation;

a processor, configured to determine, according to a collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node; and receive according to the subframe The situation and the node distance, adjusting the spatial multiplexing distance threshold or the time-frequency resource of the interfering node.

According to still another aspect of the embodiments of the present disclosure, a scheduling platform of a road-to-road cooperative communication system is provided, including:

a receiving module, configured to receive notification information that is sent by any node in the vehicle road cooperative communication system after detecting a collision of the subframe, and collect the number of times of receiving the notification information in a preset spatial multiplexing distance adjustment period ;

a determining module, configured to determine whether the number of times of receiving exceeds a predetermined threshold;

And an adjustment module, configured to clear the number of receptions when the number of receptions exceeds a predetermined threshold, and increase the spatial multiplexing distance threshold according to a predetermined step size.

Optionally, in the above solution, the adjusting module is further configured to: if the number of times of receiving the statistics in the spatial multiplexing distance adjustment period is 0, reduce the spatial multiplexing distance according to a predetermined step size. Threshold.

a receiver, configured to receive notification information sent by any node in the vehicle road cooperative communication system after detecting a collision of a subframe, and collect statistics of the number of times of receiving the notification information in a preset spatial multiplexing distance adjustment period ;

And a processor, configured to determine whether the number of times of receiving exceeds a predetermined threshold, and when the number of times of receiving exceeds a predetermined threshold, clear the number of times of receiving, and increase the spatial multiplexing distance threshold according to a predetermined step size.

According to still another aspect of an embodiment of the present disclosure, a node of a road cooperative communication system is provided, including:

a detecting module, configured to detect whether a receiving subframe of the first node collides;

And a sending module, configured to: when the detecting module detects that the receiving subframe collides, determine a collision location of the subframe and a subframe receiving situation at the collision location, and send a collision including the subframe to the scheduling platform. And the interference information of the location and the subframe receiving situation at the collision location, so that the scheduling platform uses the interference information to adjust a spatial multiplexing distance threshold of the road cooperative communication system.

Optionally, in the foregoing solution, the method further includes:

a receiving module, configured to receive, by the scheduling platform, a request message for requesting reporting, for reporting, a signal quality of each of the interfering nodes when the signal is sent at the collision location;

The sending module is further configured to detect, according to the request message, a signal quality of each interference node and send the signal quality to the scheduling platform.

a receiver, configured to detect whether a receiving subframe of the node collides;

a transmitter, configured to determine, when the receiver detects a collision of a receiving subframe, a collision location of the subframe and a subframe reception situation at the collision location, and send a collision location including the subframe and the collision to the scheduling platform The subframe at the location receives the interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.

Compared with the related art, the spatial multiplexing method, device and node of the time-frequency resource of the road-to-vehicle cooperative communication system provided by the embodiments of the present disclosure enable the spatial multiplexing distance to adapt to the node interference situation, and the node of the spatial multiplexing resource can be reduced. The occurrence of resource collisions increases the utilization of system time-frequency resources.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments described in the present application. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work. The following figures are not intended to be scaled to scale in actual dimensions, with emphasis on the subject matter of the present application.

1 is a schematic flowchart 1 of a spatial multiplexing method for time-frequency resources provided by an embodiment of the present disclosure;

2 is a second schematic flowchart of a spatial multiplexing method for time-frequency resources provided by an embodiment of the present disclosure;

FIG. 3 is a schematic flowchart 3 of a spatial multiplexing method for time-frequency resources provided by an embodiment of the present disclosure:

FIG. 4 is a schematic diagram of an application scenario of a spatial multiplexing method according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another application scenario of a spatial multiplexing method according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of still another application scenario of a spatial multiplexing method according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram 1 of a scheduling platform provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram 2 of a scheduling platform according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram 3 of a scheduling platform provided by an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram 4 of a scheduling platform provided by an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram 1 of a node provided by an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram 2 of a node provided by an embodiment of the present disclosure.

detailed description

The technical solutions in some embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all An embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

In order to improve resource utilization, the vehicle-based cooperative communication system usually adopts a spatial multiplexing method, and allocates the same time-frequency resources for transmitting signals to different transmitting nodes that satisfy the interference condition. When the vehicle-based cooperative communication system performs spatial multiplexing of time-frequency resources, according to the relationship between the static position information between the nodes and the spatial multiplexing distance determined in advance, if the distance between the nodes exceeds the spatial multiplexing distance, it is considered that the nodes can Spatial reuse resources. The spatial multiplexing distance is usually set by setting a typical scene for simulation, setting a static spatial multiplexing distance according to the simulation result, or setting a spatially multiplexable distance through theoretical analysis and rough estimation.

The above-mentioned processing mode only considers the static setting spatial multiplexing distance threshold in a typical scenario. In practical applications, the typical scenario may not meet the interference requirements in the actual scenario, resulting in resource collision between nodes that allocate spatial multiplexing resources. Theoretical analysis, if the 3-hop or 2-hop transmission range is set as the spatial multiplexing distance threshold, the multiplexing distance is different from the interference situation in the actual system. The interference situation cannot be accurately reflected. The above spatial multiplexing method, because of the static configuration method, sets the spatial multiplexing distance threshold, and cannot accurately reflect the influence of interference on spatial multiplexing.

The embodiment of the present disclosure proposes a spatial multiplexing method for time-frequency resources of a vehicle-road cooperative communication system, and dynamically adjusts a spatial multiplexing distance threshold according to system interference conditions, so that time-frequency resources can be effectively spatially multiplexed, thereby improving System resource utilization. The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in the following description.

A vehicle road cooperative communication system of an embodiment of the present disclosure generally includes a dispatch platform and a plurality of nodes. The scheduling platform can be deployed in a base station (eNB). Specifically, the scheduling platform can be deployed in one base station. The base station has a certain coverage, and the base station can perform resource scheduling on nodes located within its coverage. Certainly, the scheduling platform may also be deployed in multiple base stations, and the scheduling platform performs resource scheduling on the nodes in the coverage of the multiple base stations.

Referring to FIG. 1 , a spatial multiplexing method for a time-frequency resource of a vehicle road cooperative communication system provided by an embodiment of the present disclosure includes the following steps when applied to a scheduling platform in a road cooperative communication system:

Step 11: Receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception situation at the collision location.

Step 12: Determine, according to the collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node.

Step 13: Adjust a spatial multiplexing distance threshold or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.

As can be seen from the above steps, the embodiment of the present disclosure adjusts the time-frequency resource allocated to the interference node according to the reception condition of the collision subframe and the node distance between the relevant nodes, or adjusts the spatial multiplexing distance threshold, thereby The interference condition is used to set the spatial multiplexing distance threshold, so that the time-frequency resources can effectively perform spatial multiplexing and improve system resource utilization.

The spatial multiplexing method of another embodiment of the present disclosure is further described below, and the method includes:

Step 21: Receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception situation at the collision location.

Here, the nodes in the road cooperative communication system transmit signals on the allocated subframes. Due to the spatial multiplexing technique, multiple nodes may be allocated subframes of the same time-frequency resource, that is, the multiple nodes may simultaneously transmit signals on the same subframe, thereby causing collision of subframes. When receiving the subframe sent by the other node, if the subframe detects that the subframe collides, the first node sends the interference information to the scheduling platform, where the subframe collision location is used to indicate the subframe position where the collision occurs, and the subframe is used. The reception condition is then used to indicate whether the subframe was successfully received at the collision location.

Step 22: Determine, according to the collision position of the subframe, an interference node that transmits a signal at the collision location, acquire node information of each interference node and the first node, and calculate interference nodes between the node according to the acquired node location information, and a node distance between a node and an interfering node, and determining a first interfering node in the interfering node that is closest to the first node.

Here, the scheduling platform may determine, according to the allocation of the time-frequency resources, a node (hereinafter referred to as an interference node) to which the time-frequency resource is allocated at the collision position of the subframe, and the interference nodes send signals on the same subframe, so May cause a collision of sub-frames to occur. In an embodiment of the present disclosure, the scheduling platform determines a distance between each of the interfering nodes and a distance between the first node and the interfering node.

Step 23: Adjust a time-frequency resource of the interference node or adjust a spatial multiplexing distance threshold of the time-frequency resource of the road-to-vehicle cooperative communication system according to the subframe receiving situation and the node distance, specifically, receiving in the subframe. If the situation indicates that the subframe reception fails, or the subframe reception status indicates that the subframes of the other interference nodes other than the first interference node are successfully received, it is determined whether the node distance between the interference nodes is greater than the spatial multiplexing distance threshold. :

A) if the node distance between any two interfering nodes is not greater than the spatial multiplexing distance threshold, allocate other time-frequency resources different from the first interfering node to other interfering nodes outside the first interfering node. The spatial multiplexing distance threshold is no longer adjusted.

Here, assuming that the distance between any two interfering nodes is less than the spatial multiplexing distance threshold, the other interfering nodes outside the first interfering node are allocated different time-frequency resources from the first interfering node to reduce the possible Subframe collision. Optionally, when the time-frequency resource is allocated to the other interference node, the time-frequency resource is further allocated according to the distance between the other interference nodes and the current spatial multiplexing distance threshold.

B) when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, then the space is increased. Inter-multiplex distance threshold.

Here, the foregoing signal quality may be obtained by: the first node may carry information about the signal quality of each interfering node received at the collision location in the interference information sent when the collision is detected, or the first node periodically The signal quality of any of the detected nodes is sent to the scheduling platform, and the scheduling platform obtains the signal quality of each of the interfering nodes. Certainly, the scheduling platform may also request the first node to report the received signal quality of each interference node, and further determine, according to the received signal quality reported by the first node, whether the signal quality of each interference node received by the first node is inferior to Preset quality threshold.

Here, it is assumed that the distance between any two interfering nodes is greater than or equal to the spatial multiplexing distance threshold, and the signal quality of each interfering node received by the first node is worse than a preset quality threshold, that is, the first node. The signal quality of each interfering node is inferior to the preset quality threshold. At this time, the spatial multiplexing distance threshold can be increased according to the preset step size. It is assumed that the signal quality is characterized by the signal-to-interference plus noise ratio (SINR). After studying the actual vehicle-based cooperative communication system, it is found that when the signal quality SINR is inferior to the preset threshold, it is usually because of interference between the interfering nodes. In the case of too large, in this case, it is necessary to increase the spatial multiplexing distance threshold to reduce interference between nodes.

Here, if the distance between any two interfering nodes is greater than or equal to the spatial multiplexing distance threshold, the signal quality (such as SINR) of the first node receiving one or some interfering nodes is better than the quality threshold. At this time, the base station can maintain the status quo, and does not perform the adjustment action of the time-frequency resource or the spatial multiplexing distance threshold.

After the spatial multiplexing distance threshold is adjusted, the subsequent base station may allocate time-frequency resources to each node based on the updated spatial multiplexing distance threshold to reduce possible subframe collisions.

In the foregoing step 23, if the subframe reception status indicates that the subframe of the first interfering node is successfully received, the situation is reasonable, and the spatial multiplexing distance or the time-frequency resource does not need to be adjusted, that is, the subframe does not need to be executed. Any action.

The foregoing describes how the embodiment of the present disclosure dynamically adjusts the spatial multiplexing distance or the time-frequency resource of the node based on the node distance and the subframe receiving situation, can reduce the subframe collision, and improve the utilization of the time-frequency resource.

The above embodiment performs spatial multiplexing processing according to this event of the interference information reported by the node. The embodiment of the present disclosure may also periodically perform spatial multiplexing distance adjustment of the system according to a predetermined spatial multiplexing distance adjustment period. Referring to FIG. 2, a spatial multiplexing method for time-frequency resources of a road-to-road cooperative communication system according to another embodiment of the present disclosure includes the following steps:

Step 31: Receive notification information sent by any node in the vehicle route cooperative communication system after detecting a subframe collision, and count the number of times the notification information is received in a preset spatial multiplexing distance adjustment period;

Step 32: Determine whether the number of times of receiving exceeds a predetermined threshold;

Step 33: When the number of receptions exceeds a predetermined threshold, clear the number of receptions, and increase the spatial multiplexing distance threshold according to a predetermined step size.

In the above steps, in each adjustment period, if the number of receptions reaches a predetermined threshold, the spatial multiplexing distance threshold is increased according to a predetermined step size to reduce possible subframe collisions.

If the number of received statistics in a spatial multiplexing distance adjustment period is 0, at the end of the period, the spatial multiplexing distance threshold may be decreased according to a predetermined step size to improve utilization of time-frequency resources.

The above embodiment illustrates the spatial multiplexing method of the embodiment of the present disclosure from the perspective of the scheduling platform. The processing flow of the node of the vehicle road cooperative communication system in the embodiment of the present disclosure is further described below with reference to FIG. 3 . Referring to FIG. 3 , the processing flow includes the following steps:

Step 41: The first node in the vehicle road cooperative communication system detects whether a receiving subframe collides;

Step 42: When detecting that the receiving subframe collides, the first node determines a collision location of the subframe and a subframe reception situation at the collision location, and sends a collision location including the subframe to the scheduling platform and the collision location. Interference information for the reception of the subframe.

Providing the foregoing interference information to the scheduling platform, so that the scheduling platform can use the interference information to adjust the time-frequency resource of the interference node or adjust the spatial multiplexing distance threshold of the time-frequency resource of the road-to-vehicle cooperative communication system, so as to reduce subframe collision and improve Time-frequency resource utilization.

In this embodiment, the first node may periodically send the signal quality of any node detected by the scheduling platform to the scheduling platform, or carry the interference information sent at the collision location in the interference information sent when the collision is detected. The information about the signal quality of the interfering node may also report the received signal quality of each interfering node based on the request of the scheduling platform, that is, the signal quality of each interfering node sent by the scheduling platform for requesting reporting of the signal transmitted at the collision location Request message, and then root According to the request message, the signal quality of each interference node is detected and sent to the scheduling platform.

As can be seen from the above method provided by the embodiments of the present disclosure, the embodiment of the present disclosure adjusts the time-frequency resource or the spatial multiplexing distance according to the interference information at the node, and changes the manner of statically setting the spatial multiplexing distance of the related art. The spatial multiplexing distance can adapt to the node interference situation, which can reduce the occurrence of resource collision between nodes of the scheduling platform to allocate spatial multiplexing resources, and improve the utilization rate of the system time-frequency resources.

To assist in understanding the above aspects of the embodiments of the present disclosure, the present disclosure is further described below in conjunction with several specific application examples. Each of the following scenarios includes a base station (eNB) and a plurality of nodes (vehicle A, vehicle B, and vehicle C), and the time-frequency resource scheduling platform of the vehicle-road cooperative communication system is disposed in the base station.

In the following example, the case where a node detects a subframe collision is divided into two cases: strong interference and strong interference. The strong interference is that after the subframe detects the collision of the subframe, the subframe data can be successfully decoded, that is, the subframe data is successfully received; the strong interference is that the node fails to decode the subframe data after detecting the subframe collision. That is, the sub-frame data was not successfully received. Further, according to the interference situation, the interference information sent by the node to the scheduling platform is divided into a strong interference indication and a strong interference indication. Therefore, in the following example, the information reported by a receiving node may include the following:

1) Strong interference indication (nodes discover resource collisions and subframe reception failures): subframes that need to report receiving node information and generate strong interference. This indication can be triggered immediately according to the collision event.

2) Strong interference indication (the node discovers the resource collision but can correctly receive the information of a certain sending node): It needs to report the receiving node information and the subframe with strong interference. This indication can be triggered immediately according to the collision event.

3) Signal to Interference plus Noise Ratio (SINR): The receiving node needs to report the SINR of each sending node, which can be reported immediately according to the collision event, and can also be reported periodically, or according to the request of the scheduling platform. And reported.

4) Node location information: for example, reporting the longitude, latitude, altitude, lane, etc. of the node. The information can be reported immediately according to the collision event, or can be reported periodically.

In one example, the spatial multiplexing distance is adjusted according to a preset spatial multiplexing distance adjustment period.

Specifically, the base station statistics on any node received within a spatial multiplexing distance adjustment period The cumulative number of reported interference indications, including strong interference indications and strong interference indications. If the base station has not received the interference indication reported by any node in one cycle, at the end of the period, the spatial multiplexing distance threshold may be reduced according to the predetermined step size. If the cumulative number of interference indications received by any node in a period exceeds a predetermined threshold, the spatial multiplexing distance threshold is increased according to a predetermined step size.

As shown in FIG. 4, it is assumed that the base station initially configures a default spatial multiplexing distance threshold of 900 meters, assuming that the spatial multiplexing distance adjustment period is 1 second. Vehicle B and vehicle C perform spatial multiplexing of time-frequency resources. When vehicle A receives messages from other vehicles within one adjustment period, no resource collision is found. Similarly, neither vehicle B nor vehicle C found a resource collision. Then, in the spatial multiplexing distance adjustment period, if the base station does not receive the strong interference indication or the strong interference indication reported by any node, the base station does not need to perform the re-adjustment of the time-frequency resources, and the base station can also follow the given step size. Assuming a step size of 5 meters and reducing the spatial multiplexing distance threshold, the reduced spatial multiplexing distance threshold is 900-5=895 meters.

In another example, the spatial multiplexing distance is adjusted based on events indicated by strong interference.

Specifically, it is assumed that the base station initially configures a default spatial multiplexing distance threshold of 900 meters. As shown in FIG. 5, the vehicle A receives the message sent by other vehicles, and detects that the signal receiving power is large, but cannot be successfully decoded. At this time, the vehicle A determines that a resource collision has occurred. The vehicle A can send a strong interference indication to the base station by signaling, and report information of the receiving node (vehicle A) and the position of the subframe where strong interference occurs.

After receiving the strong interference indication sent by the vehicle A, the base station performs the following processing:

1) When the base station receives the strong interference indication reported by the receiving node car A, according to the subframe in which the strong interference is reported in the strong interference indication message, the node that finds the message simultaneously at the subframe position is the car B and the car C. .

2) The base station configures the car B and the car C to report their latest node position information. If the location information of the car A is not carried in the strong interference indication, the car A can be configured to report its node location information.

3) The base station calculates the distance between the nodes according to the node position information of the car A, the car B and the car C, and determines whether it is greater than the spatial multiplexing distance, specifically:

- If the distance between the car B and the car C is 800 meters, which is not greater than the current limit of 900 m for the spatial multiplexing distance, it is assumed that the distance between the car C and the car A is greater than the distance between the car B and the car A. Distance, the base station only configures the vehicle C for time-frequency resource adjustment, and assigns the vehicle C a different time frequency than the vehicle B. Source, no longer adjust the spatial multiplexing distance threshold.

- If the distance between the car B and the car C is 1000 meters, which is greater than the current limit of the spatial multiplexing distance of 900 meters, the spatial multiplexing distance of the set is too small; at the same time, the base station obtains the car B reported by the car A. And the SINR of the transmitted signal of the vehicle C, if the SINR of both is lower than a predetermined SINR threshold, the base station increases the spatial multiplexing distance threshold; if the SINR of any one is greater than or equal to the SINR threshold, the base station does not Perform time-frequency resource adjustment or spatial multiplexing distance adjustment.

In yet another example, the spatial multiplexing distance is adjusted based on events of stronger interference indication.

Specifically, it is assumed that the base station initially configures a default spatial multiplexing distance value of 900 meters. As shown in FIG. 6, the vehicle A receives the message sent by other vehicles, and can successfully decode, but the detection interference is strong, and it is judged that a resource collision occurs. The vehicle A sends a strong interference indication to the base station, and reports information such as the receiving node information and the subframe position where strong interference occurs.

1) When the base station receives the strong interference indication reported by the receiving node car A, according to the subframe in which the strong interference occurs in the strong interference indication message, the node that simultaneously sends the message at the subframe position is the vehicle B. And car C.

3) The base station calculates the distance between the nodes according to the node position information of the vehicle, and determines whether it is greater than the spatial multiplexing distance, specifically:

- It is assumed that the car A successfully decodes the signal of the car B, and the car B is closer to the car A than the car C. In this case, the normal reception, the base station does not need to re-adjust the time-frequency resources, and does not need to adjust the spatial multiplexing distance, and can directly end the process.

- It is assumed that the car A successfully decodes the signal of the car C, but the car B is closer to the car A than the car C. In this case, it is abnormal reception, and it is necessary to perform re-adjustment of time-frequency resources, and also needs to adjust the spatial multiplexing distance. specifically:

If the distance between the car B and the car C is 800 meters, which is not greater than the current limit of 900 m of the spatial multiplexing distance threshold, the car C is far away from the car A of the receiving node, and the base station only configures the car C for time-frequency resources. The adjustment uses a time-frequency resource different from that of the car B, and no longer adjusts the spatial multiplexing distance threshold.

If the distance between the car B and the car C is 1000 meters, which is greater than the current limit of the spatial multiplexing distance of 900 meters, the spatial multiplexing distance set by the system is too small. Moreover, if the base station receives the SINR of the transmission signal to the vehicle B and the vehicle C reported by the vehicle A, if both are lower than the preset SINR threshold, the base station increases the spatial multiplexing distance threshold. Subsequently, the base station may allocate time-frequency resources to the nodes according to the updated spatial multiplexing distance threshold.

In yet another example, the statistical processing of the period is adjusted based on the spatial multiplexing distance.

Specifically, it is assumed that the spatial multiplexing distance adjustment period is 1 second. It is assumed that during the spatial multiplexing distance adjustment period, the base station receives a strong interference indication or a strong interference indication sent by any node, and can be processed according to the following process:

The base station counts the cumulative number of strong interference indications and strong interference indications received in one adjustment period, assuming that the number of times in a period is 2. If the cumulative number reaches the threshold 2 before the end of the current adjustment period, the spatial multiplexing distance adjustment is performed immediately, the spatial multiplexing distance is increased according to the given step size, and the cumulative number of times is cleared. If the cumulative number of times does not reach the threshold when the current adjustment period ends, the spatial multiplexing distance adjustment will not be performed, and the cumulative number of times will not be cleared, and will be counted in the next cycle, and will continue to be processed according to the above processing method.

Of course, at the end of each round of the adjustment period, the cumulative number of times can be cleared to recount in a new round of adjustment period, and the spatial multiplexing distance is adjusted according to the recount value.

Based on the spatial multiplexing method provided by the above embodiments, the embodiments of the present disclosure also provide an apparatus and a node for implementing the above method. The embodiments of the present disclosure provide a vehicle road cooperative communication system scheduling platform, which may be disposed in one or more base stations. As shown in FIG. 7, the scheduling platform includes:

The receiving module 71 is configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception at the collision location. Happening;

a determining module 72, configured to determine, according to a collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node;

The adjusting module 73 is configured to adjust a spatial multiplexing distance threshold or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.

Through the above module, the scheduling platform of this embodiment can dynamically adjust the spatial multiplexing distance according to the interference information, reduce subframe collision between nodes, and improve resource utilization.

The determining module 72 is specifically configured to acquire node information of each interference node and the first node, and calculate a node distance between the interference nodes and between the first node and the interference node according to the acquired node location information. And determining a first interfering node of the interfering node that is closest to the first node.

The adjustment module 73 specifically includes:

a first processing module, when the node distance between any two interference nodes is not greater than the spatial multiplexing distance threshold, when the other interference nodes outside the first interference node are allocated different times from the first interference node, Frequency resource;

a second processing module, configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, increase The spatial multiplexing distance threshold;

The first processing module further allocates time-frequency resources to the other interfering nodes according to the distance between the other interfering nodes and the spatial multiplexing distance threshold.

The second processing module is further configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, request the first node to report the received signal quality of each interfering node, according to the first node reporting The signal quality is received, and it is determined whether the signal quality of each interference node received by the first node is inferior to the preset quality threshold.

With further reference to FIG. 8, the embodiment of the present disclosure provides another structure of a scheduling platform. As shown in FIG. 12, the scheduling platform includes:

The receiver 81 is configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision position of the subframe and a subframe reception at the collision location. Happening;

The processor 82 is configured to determine, according to the collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node; according to the subframe Receiving the situation and the distance of the node, adjusting the spatial multiplexing distance threshold or the time-frequency resource of the interfering node.

The scheduling platform may further include: a memory 83, configured to store node location information sent by the node, and further store node travel information, and a distance, a velocity component, and an acceleration component obtained by the storage processor 82 during the operation. And other data.

Processor 82 and memory 83 are coupled to receiver 81 via a bus interface, respectively; the bus architecture can include any number of interconnected buses and bridges; one or more processors represented by processor 82, and one represented by memory 83. Or various circuits of multiple memories are connected together. The bus architecture also connects various other circuits such as peripherals, voltage regulators, and power management circuits.

The bus architecture can provide a variety of bus interfaces. Receiver 81 can be a plurality of components that provide means for communicating with various other devices on a transmission medium. The processor 82 is responsible for managing the bus architecture and the usual processing, and the memory 83 can store data used by the processor in performing the operations.

Referring to FIG. 9 , a scheduling platform provided by another embodiment of the present disclosure includes:

The receiving module 91 is configured to receive notification information that is sent by any node in the road cooperative communication system after detecting a collision of the subframe, and collect the notification information in the preset spatial multiplexing distance adjustment period. frequency;

The determining module 92 is configured to determine whether the number of times of receiving exceeds a predetermined threshold;

The adjusting module 93 is configured to clear the number of receiving times when the number of times of receiving exceeds a predetermined threshold, and increase the spatial multiplexing distance threshold according to a predetermined step size.

Here, the adjustment module 93 is further configured to reduce the spatial multiplexing distance threshold according to a predetermined step size if the number of times of receiving the statistics in the spatial multiplexing distance adjustment period is 0.

Through the above module, the embodiment realizes that the spatial multiplexing distance is dynamically adjusted according to the number of times of receiving the notification information in the adjustment period, which can reduce the collision probability of the node subframe and improve the utilization of the time-frequency resource.

With further reference to FIG. 10, the embodiment of the present disclosure provides a further structure of the scheduling platform. As shown in FIG. 10, the scheduling platform includes:

The receiver 101 is configured to receive notification information that is sent by any node in the road cooperative communication system after detecting a collision of a subframe, and collect the notification information in a preset spatial multiplexing distance adjustment period. frequency;

The processor 102 is configured to determine whether the number of times of receiving exceeds a predetermined threshold, and when the number of times of receiving exceeds a predetermined threshold, clear the number of times of receiving, and increase the spatial multiplexing distance threshold according to a predetermined step size.

The scheduling platform may further include: a memory 103, configured to store node location information sent by the node, and further store node travel information, and a distance, a velocity component, and an acceleration component obtained by the storage processor 102 during the operation. And other data.

Processor 102 and memory 103 are coupled to receiver 101 via a bus interface, respectively; the bus architecture can include any number of interconnected buses and bridges; one or more processors represented by processor 102, and one represented by memory 103 Or various circuits of multiple memories are connected together. The bus architecture also connects various other circuits such as peripherals, voltage regulators, and power management circuits.

The bus architecture can provide a variety of bus interfaces. Receiver 101 can be a plurality of components that provide means for communicating with various other devices on a transmission medium. The processor 102 is responsible for managing the bus architecture and general processing, and the memory 83 can store data used by the processor in performing operations.

Embodiments of the present disclosure also provide a node of a road-to-vehicle cooperative communication system, which may be a device deployed in a vehicle or a vehicle. As shown in Figure 11, the node includes:

The detecting module 111 is configured to detect whether a receiving subframe of the first node collides;

The sending module 112 is configured to: when the detecting module detects that the receiving subframe collides, determine a collision location of the subframe and a subframe receiving situation at the collision location, and send the collision location including the subframe and the collision location to the scheduling platform. The subframe is received by the interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.

The above nodes may also include:

The embodiment of the present disclosure further provides another structure of a node of the road cooperative communication system. As shown in FIG. 12, the node includes:

The receiver 121 is configured to detect whether a receiving subframe of the local node collides;

The transmitter 122 is configured to determine, when the receiver 121 detects a collision of the receiving subframe, a collision location of the subframe and a subframe reception situation at the collision location, and send a collision location including the subframe to the scheduling platform. The subframe at the collision location receives the interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be completed by a computer program indicating related hardware, and the computer program includes instructions for performing some or all of the above steps. And the computer program can be stored in a readable storage medium, which can be any form of storage medium.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present disclosure. And retouching should also be considered as protection of this disclosure.

Claims

A spatial multiplexing method for time-frequency resources of a vehicle-road cooperative communication system, comprising:

Receiving, by the first node in the vehicle road cooperative communication system, interference information that is sent after detecting a collision of a subframe, where the interference information includes a collision location of the subframe and a subframe reception situation at the collision location;

Determining, by the collision location of the subframe, an interference node that transmits a signal at the collision location, and determining a node distance between the interference nodes and between the first node and the interference node;

And adjusting a spatial multiplexing distance threshold of the road cooperative communication system or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.
The method of claim 1 wherein said determining a node distance between the interfering node and the first node comprises:

Obtaining, by each of the interfering nodes and the node location information of the first node, calculating, according to the acquired node location information, a node distance between the interfering nodes and between the first node and the interfering node, and determining a distance from the first node in the interfering node The nearest first interference node.
The method according to claim 2, wherein the adjusting the time-frequency resource of the interfering node or adjusting the spatial multiplexing distance threshold of the time-frequency resource of the road-to-vehicle cooperative communication system according to the subframe reception condition and the node distance ,include:

When the subframe reception status indicates that the subframe reception fails, or the subframe reception status indicates that the subframes of the other interference nodes other than the first interference node are successfully received, it is determined whether the node distance between the interference nodes is greater than the space. Multiplexing distance threshold;

When the node distance between any two interfering nodes is not greater than the spatial multiplexing distance threshold, the other interfering nodes outside the first interfering node are allocated time-frequency resources different from the first interfering node;

When the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, the spatial multiplexing distance threshold is increased. .
The method of claim 3, wherein the allocating different time-frequency resources to the first interfering node other than the first interfering node comprises:

And allocating time-frequency resources to the other interfering nodes according to the distance between the other interfering nodes and the spatial multiplexing distance threshold.
The method according to claim 3, wherein said adjusting a time-frequency resource of an interfering node or adjusting a spatial multiplexing distance threshold of a time-frequency resource of a road-to-vehicle cooperative communication system according to said subframe reception condition and said node distance ,Also includes:

When the subframe reception condition indicates that the subframe of the first interference node is successfully received, the flow ends.
The method of claim 3, wherein

When the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, the first node is further requested to report the received signal quality of each interfering node, and the first node is determined to be received according to the received signal quality reported by the first node. Whether the signal quality of each of the interfering nodes is inferior to the preset quality threshold.
A spatial multiplexing method for time-frequency resources of a vehicle-road cooperative communication system, comprising:

Receiving, by the any node in the vehicle road cooperative communication system, the notification information sent after detecting the collision of the subframe, and counting the number of times of receiving the notification information in the preset spatial multiplexing distance adjustment period;

Determining whether the number of receptions exceeds a predetermined threshold;

When the number of receptions exceeds a predetermined threshold, the number of receptions is cleared, and the spatial multiplexing distance threshold of the road cooperative communication system is increased according to a predetermined step size.
The method of claim 7 wherein

If the number of receptions counted in the spatial multiplexing distance adjustment period is 0, the spatial multiplexing distance threshold is decreased according to a predetermined step size.
A spatial multiplexing method for time-frequency resources of a vehicle-road cooperative communication system, comprising:

The first node in the vehicle road cooperative communication system detects whether the receiving subframe collides;

When detecting that the receiving subframe collides, the first node determines a collision location of the subframe and a subframe reception situation at the collision location, and sends a collision location including the subframe and a subframe reception at the collision location to the scheduling platform. The interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.
The method of claim 9 further comprising:

Receiving, by the first node, a request message sent by the scheduling platform for requesting reporting signal quality of each interfering node when the signal is sent at the collision location;

The first node detects the signal quality of each interference node according to the request message and sends the signal quality to the scheduling platform.
A scheduling platform for a vehicle road cooperative communication system, comprising:

a receiving module, configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception status at the collision location ;

a determining module, configured to determine, according to a collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node;

And an adjusting module, configured to adjust a spatial multiplexing distance threshold or a time-frequency resource of the interference node according to the subframe receiving situation and the node distance.
The scheduling platform of claim 11 wherein

The determining module is specifically configured to acquire node information of each interference node and the first node, and calculate a node distance between the interference nodes and between the first node and the interference node according to the acquired node location information, and determine the location The first interfering node in the interfering node that is closest to the first node.
The scheduling platform of claim 12, wherein the adjustment module comprises:

a determining module, configured to: when the subframe receiving situation indicates that the subframe receives the failure, or the subframe receiving situation indicates that the subframe of the other interfering node other than the first interfering node is successfully received, determining between the interfering nodes Whether the node distance is greater than the spatial multiplexing distance threshold;

a first processing module, when the node distance between any two interference nodes is not greater than the spatial multiplexing distance threshold, when the other interference nodes outside the first interference node are allocated different times from the first interference node, Frequency resource

a second processing module, configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, if the signal quality of each interfering node received by the first node is inferior to the preset quality threshold, increase The spatial multiplexing distance threshold.
The scheduling platform of claim 13 wherein

The first processing module is specifically configured to allocate time-frequency resources to the other interference nodes according to the distance between the other interference nodes and the spatial multiplexing distance threshold.
The scheduling platform of claim 13, wherein the adjustment module further comprises:

And a third processing module, configured to perform no action when the subframe reception status indicates that the subframe of the first interference node is successfully received.
The scheduling platform of claim 13 wherein

The second processing module is further configured to: when the node distance between the interfering nodes is greater than the spatial multiplexing distance threshold, request the first node to report the received signal quality of each interfering node, according to the first node reporting The signal quality is received, and it is determined whether the signal quality of each interference node received by the first node is inferior to the preset quality threshold.
A scheduling platform for a vehicle road cooperative communication system, comprising:

a receiver, configured to receive interference information that is sent by the first node in the road cooperative communication system after detecting a subframe collision, where the interference information includes a collision location of the subframe and a subframe reception status at the collision location ;

a processor, configured to determine, according to a collision location of the subframe, an interference node that transmits a signal at the collision location, and determine a node distance between the interference nodes and between the first node and the interference node; and receive according to the subframe The situation and the node distance, adjusting the spatial multiplexing distance threshold or the time-frequency resource of the interfering node.
A scheduling platform for a vehicle road cooperative communication system, comprising:

a receiving module, configured to receive notification information that is sent by any node in the vehicle road cooperative communication system after detecting a collision of the subframe, and collect the number of times of receiving the notification information in a preset spatial multiplexing distance adjustment period ;

a determining module, configured to determine whether the number of times of receiving exceeds a predetermined threshold;

And an adjustment module, configured to clear the number of receptions when the number of receptions exceeds a predetermined threshold, and increase the spatial multiplexing distance threshold according to a predetermined step size.
A scheduling platform according to claim 18, wherein

The adjusting module is further configured to: when the number of times of receiving the statistics in the spatial multiplexing distance adjustment period is 0, reduce the spatial multiplexing distance threshold according to a predetermined step size.
A scheduling platform for a vehicle road cooperative communication system, comprising:

a receiver, configured to receive notification information sent by any node in the vehicle road cooperative communication system after detecting a collision of a subframe, and collect statistics of the number of times of receiving the notification information in a preset spatial multiplexing distance adjustment period ;

a processor, configured to determine whether the number of times of receiving exceeds a predetermined threshold, and when the number of times of receiving exceeds a predetermined threshold, clear the number of times of receiving, and increase the spatial multiplexing according to a predetermined step size Distance threshold.
A node of a vehicle road cooperative communication system, comprising:

a detecting module, configured to detect whether a receiving subframe of the first node collides;

a sending module, configured to: when the detecting module detects that the receiving subframe collides, determine a collision location of the subframe and a subframe receiving situation at the collision location, and send a collision location including the subframe to the scheduling platform and the collision location The subframe receives the interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.
The node of claim 21, further comprising:

a receiving module, configured to receive, by the scheduling platform, a request message for requesting reporting, for reporting, a signal quality of each of the interfering nodes when the signal is sent at the collision location;

The sending module is further configured to detect, according to the request message, a signal quality of each interference node and send the signal quality to the scheduling platform.
A node of a vehicle road cooperative communication system, comprising:

a receiver, configured to detect whether a receiving subframe of the node collides;

a transmitter, configured to determine, when the receiver detects a collision of a receiving subframe, a collision location of the subframe and a subframe reception situation at the collision location, and send a collision location including the subframe and the collision to the scheduling platform The subframe at the location receives the interference information of the situation, so that the scheduling platform uses the interference information to adjust the spatial multiplexing distance threshold of the road cooperative communication system.