Medium access control method of radio local network and power supply management

Abstract

The present invention relates to a medium access control method, which includes three processes, namely priority processing process, collision analysis process, and polling process. The priority processing process is to use frame exchange to ensure that the mobile station with high priority can join the polling list before the mobile station with low priority. The collision resolution process uses a tree segmentation algorithm to enable mobile stations that pass the priority processing period to join the polling list within a limited time. The polling process is to let the wireless access point execute a scheduling algorithm, so that the mobile stations in the polling list can transmit data sequentially according to the instruction of the vector serial polling frame. The mobile station in the power saving mode can return to the dormant state if it finds that it cannot transmit or receive any frame during the polling period after checking the vector serial polling frame. The present invention can achieve the functions of multiple priority support, fast control right reservation, dynamic bandwidth allocation, admission control, and power management.

Description

technical field [0001] The invention relates to a medium access control (MAC for short) method, which is suitable for wireless area networks and can provide service quality assurance and power saving effects. Specifically, the method of the present invention simultaneously supports functions such as multiple priorities, fast control right reservation, dynamic bandwidth allocation, admission control, and power management. Background technique [0002] With the popularization of portable computers and the advancement of wireless modulation technology, more and more multimedia applications require WLAN protocols to support QoS. The basic service area (basicservice set) of the WLAN usually includes a wireless access point (accesspoint, generally translated as wireless access point or wireless bridge) and a limited number of mobile stations (mobile station, referred to as station, It is a device with wireless communication function, such as: mobile phone, PDA, notebook computer,...

AI Technical Summary

Problems solved by technology

[0004] Although 802.11 attempts to use PCF to provide quality of service guarantees, PCF has the following disadvantages: (1) Any mobile station must send association or reassociation frames during contention if it wants to obtain contention-free services ) to the wireless access point

Because DCF adopts the competition mode, there is no guarantee when the mobile station can join the polling list

(2) Since DCF does not support the priority function, it is possible that mobile stations with low priority will join the polling list before mobile stations with high priority

The problem of priority reversal is quite serious, and it may cause WLAN users to be reluctant to pay for services with higher priority

Images