Method for realizing bandwidth ensurement to high-priority-level user in wireless LAN

Abstract

Based on measured congestion state, different adaptive parameters are assigned to sites with different priority respectively. That is to say different parameters possess adjustment ranges with different initial competition window. Based on collision situation, in allowed adjustment range, site own can adjust size of initial competition window, i.e. self-adaptive control of access probability and transmission of each site. Thus, under heavy load, bandwidth of user with high priority is ensured; whole utilization rate of system is guaranteed or total throughput of system is raised. The invention solves disadvantages of lowering bandwidth of user with low priority and low performances of system when there are lots of sites in wireless local network (IEEE802.11) and under heavy load.

Description

technical field [0001] The invention relates to a realization method for ensuring better bandwidth for high-priority users in an IEEE802.11 wireless local area network, and belongs to the technical field of performance improvement and enhancement of wireless networks in wireless communication. Background technique [0002] In recent years, because wireless communication can provide users with convenient and fast access means, wireless communication technology has attracted more and more attention from people in the industry and has developed rapidly. As an important means of wireless local access, WLAN has broad application prospects in both military and civilian applications. The performance improvement of the WLAN protocol has naturally become a focus of attention. For this reason, the American Institute of Electrical and Electronics Engineers IEEE formulated the wireless local area network standard IEEE802.11 in 1999 to provide a broadband network that supports asynchron...

AI Technical Summary

Problems solved by technology

These mechanisms usually take the method of sacrificing the bandwidth of low-priority users. This method can achieve a certain bandwidth guarantee effect under light load, but it will sacrifice the utilization rate of the entire system; the performance is even worse under heavy load. The bandwidth of high-priority users is often not effectively guaranteed

According to the applicant's search, no good mechanism has been found in the previous literature to support the access of different probabilities, while ensuring the service quality of high-priority users, it can also make the system throughput approach the optimal method

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