Resource scheduling method and device for vehicle infrastructure cooperative communication system, and node of vehicle infrastructure cooperative communication system

• US 10,602,524 B2
• Filed: 11/04/2016
• Issued: 03/24/2020
• Est. Priority Date: 11/05/2015
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Zhao, Li, Tang, Jiye, Fang, Jiayi, Feng, Yuan, Lin, Lin
• Primary Examiner(s): Beyen, Zewdu A
• Application Number:
  US15/768,420
• Publication Number:
  US 20180310296A1
• Time in Patent Office: 1,236 Days
• Field of Search: None
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

The present disclosure provides in some embodiments a resource scheduling method and a resource scheduling device for a vehicle infrastructure cooperative communication system, and a node of the vehicle infrastructure cooperative communication system. According to the present disclosure, a movement trend between nodes is determined in accordance with node position information, so as to spatially multiplex time-frequency resources and prevent the frequent adjustment of time-frequency resources, thereby to reduce signaling overhead for allocating the time-frequency resources and improve utilization of the time-frequency resources.

Claims

1. A resource scheduling method for a vehicle infrastructure cooperative communication system, applied to a scheduling platform in the vehicle infrastructure cooperative communication system, comprising:

receiving node position information from nodes of the vehicle infrastructure cooperative communication system;

calculating a distance between any two nodes among the nodes of the vehicle infrastructure cooperative communication system in accordance with the node position information, and determining a movement trend between the any two nodes, the movement trend indicating that the distance decreases, remains unchanged or increases;

in the case that the movement trend indicates that the distance decreases or increases, determining whether or not spatial-multiplexed time-frequency resources are capable of being used for the any two nodes in accordance with the distance between the any two nodes and the movement trend, so as to acquire a determination result;

in the case that the movement trend indicates that the distance increases and a current distance between the first node and the second node is greater than a predetermined spatial multiplexing distance threshold, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node; and

in the case that the movement trend indicates that the distance decreases and the current distance between the first node and the second node is greater than a first sum, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, the first sum being a sum of the spatial multiplexing distance threshold and a predetermined buffer distance; and

allocating available time-frequency resources for the nodes of the vehicle infrastructure cooperative communication system in accordance with the determination result.

2. The resource scheduling method according to claim 1, wherein subsequent to the step of determining the movement trend between the any two nodes, the resource scheduling method further comprises, in the case that the movement trend indicates that the distance remains unchanged, maintaining the time-frequency resources currently allocated for a first node and a second node.

3. The resource scheduling method according to claim 1, wherein the step of allocating the available time-frequency resources for the nodes in accordance with the determination result comprises:

in the case that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, allocating an identical time-frequency resource for the first node and the second node; and

in the case that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, allocating different time-frequency resources for the first node and the second node.

4. The resource scheduling method according to claim 1, wherein the step of calculating the distance between the any two nodes in accordance with the node position information and determining the movement trend between the any two nodes comprises:

calculating a distance between the first node and the second node in accordance with node position information about the first node and the second node; and

determining a variation trend of the distance in accordance with the distances acquired after two calculation operations, so as to acquire the movement trend between the first node and the second node.

5. The resource scheduling method according to claim 1, wherein in the case of receiving the node position information from the any two nodes of the vehicle infrastructure cooperative communication system, the resource scheduling method further comprises receiving node running information from the any two nodes of the vehicle infrastructure cooperative communication system, the node running information at least including a movement speed of each node, and

the step of calculating the distance between the nodes in accordance with the node position information and determining the movement trend between the any two nodes comprises:

calculating a distance between the first node and the second node in accordance with node position information about the first node and the second node; and

determining the movement trend between the first node and the second node in accordance with the node position information about the first node and the second node and the node running information.

6. The resource scheduling method according to claim 5, wherein the step of determining the movement trend between the first node and the second node in accordance with the node position information about the first node and the second node and the node running information comprises:

determining a relative speed of the first node relative to the second node in accordance with a speed of the first node and a speed of the second node; and

determining the movement trend between the first node and the second node in accordance with the relative speed of the first node relative to the second node.

7. A resource scheduling method for a vehicle infrastructure cooperative communication system, comprising steps of:

reporting, by each node of the vehicle infrastructure cooperative communication system, node position information about the node to a scheduling platform;

receiving, by each node, a time-frequency resource allocated by the scheduling platform for the node, the time-frequency resource being allocated by the scheduling platform for the node in accordance with a distance between any two nodes among the nodes of the vehicle infrastructure cooperative communication system calculated in accordance with the node position information from the any two nodes and a movement trend between the any two nodes, the movement trend indicating that the distance decreases, remains unchanged or increases, wherein in the case that the movement trend indicates that the distance decreases or increases; and

transmitting, by each node, information through the time-frequency resource allocated by the scheduling platform,

wherein in the case that the movement trend indicates that the distance decreases or increases, the resource scheduling method further comprises determining whether or not spatial-multiplexed time-frequency resources are to be used for the any two nodes in accordance with the distance between the any two nodes and the movement trend, so as to acquire a determination result, such that each node transmits the information through the time-frequency resource allocated by the scheduling platform in accordance with the determination result;

in the case that the movement trend indicates that the distance increases and a current distance between the first node and the second node is greater than a predetermined spatial multiplexing distance threshold, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node; and

in the case that the movement trend indicates that the distance decreases and the current distance between the first node and the second node is greater than a first sum, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, the first sum being a sum of the spatial multiplexing distance threshold and a predetermined buffer distance.

8. The resource scheduling method according to claim 7, wherein in the case of reporting, by each node, the node position information about the node to the scheduling platform, the resource scheduling method further comprises reporting, by each node, node running information to the scheduling platform so that the scheduling platform determines the movement trend between the nodes in accordance with the node running information, the node running information at least including a movement speed of each node.

9. A resource scheduling device for a vehicle infrastructure cooperative communication system, comprising a receiver, a processor and a memory,

wherein the receiver is configured to receive node position information from nodes of the vehicle infrastructure cooperative communication system,

the processor is configured to read programs stored in the memory, so as to:

calculate a distance between the nodes in accordance with the node position information, and determine a movement trend between any two nodes, the movement trend indicating that the distance decreases, remains unchanged or increases;

in the case that the movement trend indicates that the distance decreases or increases, determine whether or not spatial-multiplexed time-frequency resources are capable of being used for the any two nodes in accordance with the distance between the any two nodes and the movement trend, so as to acquire a determination result; and

allocate available time-frequency resources for the nodes of the vehicle infrastructure cooperative communication system in accordance with the determination result;

in the case that the movement trend indicates that the distance increases and a current distance between the first node and the second node is greater than a predetermined spatial multiplexing distance threshold, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node; and

in the case that the movement trend indicates that the distance decreases and the current distance between the first node and the second node is greater than a first sum, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, the first sum being a sum of the spatial multiplexing distance threshold and a predetermined buffer distance; and

the memory is configured to store therein data for the operation of the processor.

10. The resource scheduling device according to claim 9, wherein subsequent to the process of determining the movement trend between the any two nodes, the resource scheduling device is further configured to, in the case that the movement trend indicates that the distance remains unchanged, maintain the time-frequency resources currently allocated for a first node and a second node.

11. The resource scheduling device according to claim 9, wherein the process of allocating the available time-frequency resources for the nodes of the vehicle infrastructure cooperative communication system in accordance with the determination result comprises:

in the case that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, allocating an identical time-frequency resource for the first node and the second node; and

in the case that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, allocating different time-frequency resources for the first node and the second node.

12. The resource scheduling device according to claim 9, wherein the process of calculating the distance between the any two nodes in accordance with the node position information and determining the movement trend between the any two nodes comprises:

calculating a distance between the first node and the second node in accordance with node position information about the first node and the second node; and

determining a variation trend of the distance in accordance with the distances acquired after two calculation operations, so as to acquire the movement trend between the first node and the second node.

13. The resource scheduling device according to claim 9, wherein in the case of receiving the node position information from the nodes of the vehicle infrastructure cooperative communication system, the resource scheduling device is further configured to receive node running information from the nodes of the vehicle infrastructure cooperative communication system, the node running information at least including a movement speed of each node, and

the process of calculating the distance between the any two nodes in accordance with the node position information and determining the movement trend between the any two nodes comprises:

calculating a distance between the first node and the second node in accordance with node position information about the first node and the second node; and

determining the movement trend between the first node and the second node in accordance with the node position information about the first node and the second node and the node running information.

14. The resource scheduling device according to claim 13, wherein the process of determining the movement trend between the first node and the second node in accordance with the node position information about the first node and the second node and the node running information comprises:

determining a relative speed of the first node relative to the second node in accordance with a speed of the first node and a speed of the second node; and

determining the movement trend between the first node and the second node in accordance with the relative speed of the first node relative to the second node.

15. A node of a vehicle infrastructure cooperative communication system, comprising a processor and a memory,

wherein the processor is configured to read programs stored in the memory, so as to:

report node position information about the node to a scheduling platform;

receive a time-frequency resource allocated by the scheduling platform for the node, the time-frequency resource being allocated by the scheduling platform for the node in accordance with a distance between the node and another node calculated in accordance with the node position information from the any two nodes and a movement trend between the any two nodes, the movement trend indicating that the distance decreases, remains unchanged or increases, wherein in the case that the movement trend indicates that the distance decreases or increases; and

transmit information through the time-frequency resource allocated by the scheduling platform, and

the memory is configured to store therein data for the operation of the processor,

wherein in the case that the movement trend indicates that the distance decreases or increases, the processor is further configured to determine whether or not spatial-multiplexed time-frequency resources are to be used for the any two nodes in accordance with the distance between the any two nodes and the movement trend, so as to acquire a determination result, such that each node transmits the information through the time-frequency resource allocated by the scheduling platform in accordance with the determination result;

in the case that the movement trend indicates that the distance increases and a current distance between the first node and the second node is greater than a predetermined spatial multiplexing distance threshold, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node; and

in the case that the movement trend indicates that the distance decreases and the current distance between the first node and the second node is greater than a first sum, determining that the spatial-multiplexed time-frequency resources are capable of being used for the first node and the second node, otherwise determining that the spatial-multiplexed time-frequency resources are incapable of being used for the first node and the second node, the first sum being a sum of the spatial multiplexing distance threshold and a predetermined buffer distance.

16. The node according to claim 15, wherein in the case of reporting, by each node, the node position information about the node to the scheduling platform, the node is further configured to report, by each node, node running information to the scheduling platform so that the scheduling platform determines the movement trend between the nodes in accordance with the node running information, the node running information at least including a movement speed of each node.