摘要
目前的Adhoc网中 ,为了解决隐蔽站问题提出了许多方法 ,IEEE 80 2 .11DCFMAC协议作为一种在无线Adhoc网中被建议使用的标准 ,受到人们的关注。在IEEE 80 2 .11DCF中通过使用RTS CTS握手 ,以及ACK确认帧 ,减轻了隐蔽站的影响 ,但它将导致“捕获”效应 ,即一些站占有共享信道 ,而其他站得不到信道 ,这也叫“公平性”问题。这篇文章叙述了一些有关“公平性”的解决办法 ,并通过仿真 ,说明改变IEEE80 2 .11中的退避算法 。
At present, many approaches have been proposed to address the hidden station problem in Ad hoc network. Among these, IEEE 802.11 Distributed Coordination Function is a proposed standard for wireless Ad hoc network and is paid more attention by people. In IEEE 802.11 DCF, although using RTS/CTS access method and acknowledgement packet can alleviate hidden terminal problem, it may lead to 'capture' effects which means some stations grab the shared channel and other stations suffer from starvation. This is also known as the 'fairness problem'. This paper reviews some related work in the literature. Simulation results show that modifying the backoff algorithm of IEEE 802.11 DCF can achieve better fairness in Ad hoc network.
出处
《信息技术与信息化》
2004年第4期4-7,共4页
Information Technology and Informatization
