Time slot resource selecting method and device

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...

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 is equal to the time slot resource allocation of the maintenance cycle of the time slot state table). When a data packet needs to be sent, the node only needs to determine which time slots have not been occupied by other nodes (that is, idle time slots) according to the time slot state table. One or more of these free time slots can be selected to send its own data packets. However, when the system allows nodes to use different sending rates to send data packets, each time slot resource can be used by different nodes in different cycles. Occupation, in this case, when the node sends a data packet, there is no better method for how to select the time slot resource

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