IEEE Transactions on Mobile Computing
Distributed Flow Control and Medium Access in Multihop Ad Hoc Networks
IEEE Transactions on Mobile Computing
Throughput analysis of IEEE802.11 multi-hop ad hoc networks
IEEE/ACM Transactions on Networking (TON)
Performance Modeling and Analysis of a Class of ARQ Protocols in Multi-Hop Wireless Networks
IEEE Transactions on Wireless Communications
DUCHA: A New Dual-Channel MAC Protocol for Multihop Ad Hoc Networks
IEEE Transactions on Wireless Communications
TCP performance issues over wireless links
IEEE Communications Magazine
Differentiated services for wireless mesh backbone
IEEE Communications Magazine
Journal of Network and Computer Applications
Biological Swarm Intelligence Based Opportunistic Resource Allocation for Wireless Ad Hoc Networks
Wireless Personal Communications: An International Journal
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This paper studies throughput improvement for TCP traffic in IEEE 802.11-based multihop ad hoc wireless networks. Due to the incompatibility between TCP and the IEEE 802.11 distributed coordination function (DCF) protocols, the reaction of TCP in case of packet losses can significantly reduce TCP end-to-end throughput. In this paper, we propose an opportunistic link scheduling (OLS), which is a simple enhancement to the IEEE 802.11 DCF protocol and intends to improve the compatibility between TCP and MAC layer protocols in multihop ad hoc networks. With OLS, a link with a good channel condition is allowed to transmit multiple packets consecutively as a burst, while the burst size depends on both physical channel fading and MAC layer collisions. The protocol also includes a mechanism to prevent starvation of nodes with poor channel conditions. An analytical model is developed for a four-hop chain to study the effect of the burst size and TCP congestion window size on the end-to-end transmission throughput in opportunistic link scheduling. Our results show that OLS can significantly improve the end-to-end transmission throughput, while keeping reasonably low transmission delay. The protocol is easy to implement and requires only slight modifications to the IEEE 802.11 protocol.