A Basic Security Message Broadcasting Method Based on Differential Power in TDMA-Based Vehicle Networking

Abstract

The invention discloses a TDMA-based basic security message broadcasting method for differential power in Internet of Vehicles. The method comprises the following steps: a communication node broadcasts basic security data messages in a staggered manner through different transmitting powers; after the cooperative node receives the basic security data message broadcast by the neighbor node, potential time slot use conflicts of the neighbor node are detected, and when the potential time slot use conflicts exist in the neighbor node, the cooperative node sends conflict reminding information to thedetected potential time slot use conflicts; the potential time slot uses a conflict node to change the transmit power order or select a new time slot for use.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for broadcasting basic safety messages based on differential power in the TDMA-based Internet of Vehicles. Background technique [0002] The Internet of Vehicles is a special wireless Internet of Things, which is very different from the traditional wireless network and the Internet of Things. Due to the low efficiency of the traditional transportation mode, frequent accidents and serious pollution problems, modern transportation is developing towards intelligence. Information interaction and collaborative scheduling among traffic participants are the key to intelligent transportation. Therefore, the Internet of Vehicles, which connects vehicles, vehicles and roads, and vehicles and people, has become one of the key technologies of intelligent transportation. [0003] Due to the fast moving speed of the vehicle, the network topology of the Internet of Vehicles is complex and cha...

AI Technical Summary

Problems solved by technology

[0008] However, the existing protocols do not fully consider the actual application requirements of the Internet of Vehicles, including the following problems: First, nodes using the same time slot will cause conflicts in the use of time slots as the distance between vehicles gets closer, and the protocol does not have effective conflicts Mitigation mechanism; secondly, the vehicle’s accuracy requirements for the movement situation information of surrounding nodes are actually different: the closer the node, the higher the accuracy requirement, the faster the data update frequency should be, and the farther away node has lower accuracy requirements. The situation can meet the demand. All nodes use the same power to send messages to cover a large area, which causes the channel to be overloaded when the network density is high, and reduces the performance of the protocol in high-density scenarios.

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