Communication method based on WLAN access control mechanism and application

Abstract

The invention provides a communication method based on a WLAN access control mechanism and application. Collected data are transmitted in a transmission mode based on the WLAN access control mechanism, the WLAN access control mechanism is that a user priority is added in an EDCA mechanism of an MAC layer, the added user priority is set to be the highest priority, and the user priority can preferentially gain a channel access right. The communication method based on the WLAN access control mechanism is applied to a vehicular communication system, when safety information during vehicle running accesses the channel, the safety information can preferentially gain the channel access right, competition between the safety information and other data types is avoided, therefore, time delay of the safety information is reduced, transmission of the safety information in the network is smoother, road accidents caused by the fact that the safety information is not received in time are reduced, and meanwhile congestion of the ground transportation network is reduced.

Description

technical field [0001] The present invention relates to the field of vehicle communication, and more specifically, to a communication method based on a WLAN access control mechanism and an application of the communication method. Background technique [0002] With the vigorous development of the automobile industry, urban traffic congestion, road traffic accidents and road traffic safety in bad weather have become urgent problems to be solved. Wireless communication technology in the vehicle environment has become the key to ensure driving safety and improve traffic efficiency. The content of in-vehicle communication is relatively extensive, such as automatically obtaining the traffic conditions ahead, parking lot information, uploading and downloading fixed-point audio and video information, etc. The application mode of inter-vehicle communication belongs to the two-way transmission between multiple points, which is applied to the exchange of vehicle collision avoidance in...

AI Technical Summary

Problems solved by technology

However, the low-priority flow may be because the high-priority flow has been occupying the channel, resulting in the low-priority flow has not been served, resulting in long-term transmission waiting and starvation phenomenon, which cannot guarantee the fairness of service flow transmission, resulting in serious Affects the performance of wireless communications

[0010] In vehicular communication, the real-time requirements for vehicle driving safety-related information are extremely high, but it does not belong to video stream or voice stream. Therefore, EDCA cannot fully guarantee the timely transmission of safety information, which may lead to a long wait for the transmission of safety information. and starvation phenomenon, thereby affecting traffic safety, and hindering the application of WLAN technology in vehicle communication

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