Time slot resource selecting method and device

A time slot resource and selection device technology, applied in the field of communication, can solve the problems of time slot resource occupation, prolonging the time slot resource period, and time slot resource shortage

Active Publication Date: 2016-10-05
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, in the congestion scenario of the Internet of Vehicles system, it is hoped that by reducing the rate at which nodes send messages, the period for nodes to use time slot resources is lengthened, and multiple nodes reuse the same time slot so that the system can accommodate more nodes. The use cycle of time slot resources needs to be able to change, and the existing time slot resource selection method based on the time slot state table is only suitable for the case where the transmission rate of all nodes in the system is the same and matches the maintenance period of the time slot state table (ie The cycle of the node occupying the time slot i

Method used

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  • Time slot resource selecting method and device
  • Time slot resource selecting method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0257] Node selection of sending time slots is triggered by the collision of time slot resources currently occupied by nodes, and nodes select sending time slots from the optional time slots corresponding to reusable time slots according to the time slot information recorded in the time slot state table;

[0258] Assume that the length of each time slot in the system is 1ms, and the current data transmission period of the node is 20ms. According to the information received from other nodes, it is judged that its current transmission time slot collides, and the selection of the transmission time slot is triggered;

[0259] The node maintains the information of each time slot in the time slot state table according to the information contained in the data packet received from the surrounding nodes and the information detected from the signal sent by the surrounding nodes, and determines the information according to the information of each time slot maintained in the time slot state...

Embodiment 2

[0273] The node selects the sending time slot to be triggered by the node judging that it needs to change the data sending cycle, and the node does not select the time slot that meets the requirements from the reusable time slot, and then selects the idle time slot as the sending time slot;

[0274] Assume that the length of each time slot in the system is 1ms, and the data transmission period used by nodes before is 10ms. After the node sends FI, according to the current channel load judgment, it is necessary to modify the data transmission period of the node from 10ms to 20ms, and trigger the selection of a new transmission time slot;

[0275] The node maintains the information of each time slot in the time slot state table according to the information contained in the data packet received from the surrounding nodes and the information detected from the signal sent by the surrounding nodes, and determines the information according to the information of each time slot maintain...

Embodiment 3

[0280] The node selects the sending time slot when the distance between the node and other nodes currently reusing the same time slot is greater than the first set distance, and the reusable time slot selected according to the time slot selection method on this node and the time slot that has been multiplexed The distance between nodes is greater than the distance between this node and other nodes that multiplex the currently occupied time slot on the multiplexing time slot currently occupied by the node, and the currently occupied multiplexing time slot is still used as the sending time slot:

[0281] Assume that the length of each time slot in the system is 1 ms, and the current data sending period of the node is 20 ms. After the node sends the FI, according to the maintained time slot status table, it is judged that the distance between the node and other nodes that currently multiplex the same time slot is greater than 200 meters (that is, the first set distance at this tim...

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Abstract

The invention discloses a method and device for selecting a time slot resource to satisfy the reliable time slot resource selection in different vehicle node densities, and a flexible message sending rate change is supported. The method comprises the steps that a first node receives frame information sent by other nodes besides the first node, the frame information carries indication information for representing the occupation times of time slots; according to the indication information for representing the occupation times of the time slots carried in the frame information, an available time slot resource is determined; and at least one time slot is selected from the determined available time slot resource as a sending time slot.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a time slot resource selection method and device. Background technique [0002] With the development of vehicle communication systems and the gradual maturity of mobile ad hoc network technology, in order to realize real-time, dynamic and intelligent management of vehicles, a short-range communication (Dedicated Short Range Communications, DSRC) technology for vehicle networking has been developed. Through DSRC between vehicle nodes and between vehicle nodes and roadside nodes, point-to-multipoint and point-to-point methods are used to conduct two-way interaction of information such as position, speed, road environment, and equipment status, and collect information from vehicles to vehicles, vehicles, and roadsides. The devices are organically connected, and when dangerous road conditions are sensed, the vehicles will be alerted in time, so that road safety acciden...

Claims

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Application Information

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IPC IPC(8): H04J3/16H04W72/04
Inventor 赵毅房家奕赵丽周海军
Owner DATANG MOBILE COMM EQUIP CO LTD
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