无线局域网STRP技术的系统建模及有效性分析

SIMULATION AND MATHEMATICAL ANALYSIS ON SIMULTANEOUS TRANSMIT RESPONSE POLLING SCHEME

轮询机制是基于小区的无线局域网对MAC控制的重要方法,但这种机制最主要的缺点是当网络负载较轻时效率较低,这种低效性是由于轮询网络中空闲工作站而导致活动工作站发送数据的时延。因此采用STRP轮询机制以克服在网络轻负载时的低效问题,通过数学建模和系统分析以证明该机制的有效性。

Polling scheme are an important class of medium access control protocols for wireless local area networks.A major drawback of these schemes is their inefficincy when only a small number of mobile stations have packets to transmit.This inefficiency is due to the polling of mobile stations with no packets to transmit,which delays the transmissions of mobile stations with packets.Thus,The computer network experts suggest a new polling MAC which exploits the capture phenomens and enable simultaneous polling and transmissions of information packets.In this paper,Mathematical analysis and simulation results show that the new MAC can overcomes the above inefficency considerably,and thus it is more efficient in the sense that it enables higher througput and a lower access delay.