MACAW: a media access protocol for wireless LAN's
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
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)
A Wireless MAC Protocol Using Implicit Pipelining
IEEE Transactions on Mobile Computing
A k-Round Elimination Contention Scheme for WLANs
IEEE Transactions on Mobile Computing
Bandwidth Estimation for IEEE 802.11-Based Ad Hoc Networks
IEEE Transactions on Mobile Computing
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
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MANets are very sensitive to control overhead packets due to its limited capacity. If available bandwidth is not accurately estimated, nodes will accept extra QoS requests and network will be overloaded. To improve the available bandwidth and to reduce the control overhead associated with the backoff scheme employed in MAC (Medium Access Control) layer; pipelined concept is applied to backoff procedure. Pipelined process also reduces collision probability. When the medium is busy, remaining nodes start the contention procedure in parallel for the next packet transmission. This reduces the channel waiting time. Bandwidth loss due to collision, pipelined backoff and idle time synchronization are estimated and final available bandwidth is calculated. This bandwidth measurement algorithm is integrated into routing protocol called enhanced QoS AODV (Quality of Service Ad hoc On demand Distance Vector) to find the best route based on bandwidth constraint. Simulation results show that the proposed algorithm improves the performance of the network in terms of throughput, packet delivery ratio, effective bandwidth utilization, energy consumption for different number of nodes.