GPSR Internet of Vehicles routing data forwarding method

Abstract

The invention relates to a GPSR Internet of Vehicles routing data forwarding method, which comprises the following steps: firstly, obtaining node position information according to GPS information of avehicle and a hello packet, calculating a weight value of a current node, and judging neighbor information; calculating the weight value of each neighbor node according to the position and angle relationship between the neighbor node and the destination node, and selecting the neighbor node with the highest weight value as the next hop node for data forwarding; and finally, checking whether the next hop node is out of bound or not, if not, adopting greedy prediction forwarding, and if so, adopting a peripheral forwarding mode. Compared with the prior art, according to the method, the selection of the next hop node is optimized by judging the neighbor node, calculating the weight value of the neighbor node and judging the out-of-bound of the communication range, and whether the neighbor node is in the communication transmission range can be judged in a short time, so that the reliability of data forwarding is ensured, the routing overhead is effectively controlled, and the data forwarding efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle communication, in particular to a GPSR vehicle networking routing data forwarding method. Background technique [0002] The Internet of Vehicles is a wireless network formed between mobile vehicles. The on-board equipment on the vehicle effectively utilizes all vehicle dynamic information in the information network platform through wireless communication technology, and provides different functional services during vehicle operation. [0003] GPSR (greedy perimeter stateless routing) is a relatively typical geographic location-based routing protocol suitable for the Internet of Vehicles. This protocol uses GPS and other positioning devices to obtain information about neighboring vehicle nodes. This protocol does not require a large number of Routing information to maintain neighbor information and routing table information is a routing protocol widely used in the Internet of Vehicles. [0004] T...

AI Technical Summary

Problems solved by technology

[0005] However, the greedy forwarding mechanism of the GPSR routing protocol has the following defects: the greedy forwarding mode in GPSR is that a sending node can select the next hop of the data packet according to the local optimal strategy and the greedy strategy

The nodes selected in this way may often be at the edge of the communication range. Due to the rapid movement of the vehicle, in the greedy forwarding mode, the selected next-hop node is likely to have moved out of the communication range before the data packet arrives. Under the circumstances, the data packet will be lost or resent, which will increase the control overhead, resulting in the decline of network connectivity performance and the reduction of data forwarding efficiency.

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