Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit
IEEE/ACM Transactions on Networking (TON)
A capacity analysis for the IEEE 802.11 MAC protocol
Wireless Networks
An Analysis of the Back-Off Mechanism Used in IEEE 802.11 Networks
ISCC '00 Proceedings of the Fifth IEEE Symposium on Computers and Communications (ISCC 2000)
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Reverse back-off mechanism for safety vehicular ad hoc networks
Ad Hoc Networks
Hi-index | 0.00 |
The IEEE 802.11 MAC protocol adopts the distributed coordination function (DCF) with a binary exponential backoff as a medium access control mechanism. According to previous research results and our simulation study, the performance of IEEE 802.11 is highly dependent upon the number of contending stations and the initial value of contention window (CWmin). In this paper, we propose an adaptive contention window mechanism that dynamically selects the optimal backoff window by estimating the current number of contending stations in wireless ad hoc networks. In the proposed scheme, when there are small number of contending stations, a smaller CWmin value is selected, while a larger CWmin value is selected when there are large number of contending stations. We study the performance of the proposed mechanism by simulation and we got an improved performance over the IEEE 802.11 MAC protocol which uses a fixed CWmin value.