Multichannel MAC protocol implementation method in service-intensive type vehicle-mounted network

Abstract

The invention discloses a multichannel MAC protocol implementation method in a service-intensive type vehicle-mounted network, and belongs to the field of vehicle-mounted wireless communication. The method comprises the steps: distributing a DS-ALOHA control channel access protocol and a service channel time slot, wherein the DS-ALOHA control channel access protocol employs a TDMA mechanism; introducing the concept of cluster; collecting and transmitting safety information through the cluster, thereby enabling the safety information in the network to be transmitted safely in real time; meanwhile, distributing the access of a service channel through the cluster, thereby reducing the collision among nodes, and improving the utilization rate of a business channel. The method just needs to use a single antenna to achieve the multi-channel communication, and more effectively uses wireless channel resources. Meanwhile, compared with a multi-antenna scheme, the method reduces the production cost, and reduces the energy consumption caused by the detection of safety information. The method can guarantee the reliable transmission of the safety information under the service intensive network, and improves the throughput of the system for the service information.

Description

technical field [0001] The invention belongs to the field of vehicle-mounted wireless communication, and relates to a MAC protocol, in particular to a multi-channel MAC protocol realization method in a service-intensive vehicle-mounted network. Background technique [0002] Vehicular ad hoc network is a special application of traditional mobile ad hoc network in the field of road traffic. Vehicles on the road can communicate with other vehicles or roadside units (RSU), so that the vehicles on the road form a wireless distribution network. style network. Vehicular ad hoc network is an effective method to solve traffic safety problems, and it is an important application in intelligent transportation system. In the vehicle self-organizing network, vehicles provide a safer and more comfortable driving environment for people by sharing their speed, location and other safety-related information. [0003] As a special mobile ad hoc network, the vehicular network has characteristi...

AI Technical Summary

Problems solved by technology

Since this method uses two antennas, the performance of the system is reliably guaranteed, but the production cost of the equipment is also relatively increased

At the same time, since the cluster head always listens to the messages sent by the adjacent cluster heads and cluster members in the managed cluster, the cluster head cannot exchange service data

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