A CONGESTION-AWARE ACCESS CONTROL MECHANISM IN WIRELESS NETWORKS
In standard access control mechanism, contention window is designed according to the number of collision, and ignoring the current congestion information in the network. Consequently, terminal cannot adjust the contention window timely according to the current network load. In order to solve this problem, slot utilization and the probability g are proposed in this paper to estimate the network congestion information. Then the back-off algorithm in standard protocol is improved and a novel P-probability access control mechanism (PACM) is proposed to improve the distributed access control mechanism which is aware of congestion state in 3G wireless networks. In PACM, the network congestion information is applied to basic access control, which assigns the contention window after sending data frames. Simulation results show that the probability of frame collision may fall and the throughput of the whole 3G networks can be enhanced.
Access control mechanism congestion information 3G wireless networks
Yanbing Liu Haiyan Zheng Jin Zhao
Key Laboratory of Mobile Internet Technology,Chongqing University of Posts and Telecommunications, C Key Laboratory of Mobile Internet Technology, Chongqing University of Posts and Telecommunications,
国际会议
北京
英文
477-482
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）