Title :
Distributed Flow Control and Medium Access in Multihop Ad Hoc Networks
Author :
Zhai, Hongqiang ; Fang, Yuguang
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL
Abstract :
Recent studies have shown that the performance of wireless multihop ad hoc networks is very poor. In this paper, we first demonstrate that one important reason of the poor performance is the close coupling between medium contention and network congestion. Therefore, we present a framework of distributed flow control and medium access control to address both medium contention and network congestion. The proposed scheme utilizes the MAC layer control frames to efficiently conduct the network layer´s flow control function and only allows the upstream nodes to forward enough packets to make it possible for the downstream nodes to fully utilize the shared channel but never introduce severe MAC collisions and network congestion. Extensive simulations illustrate that the proposed scheme well controls congestion and greatly alleviates medium collisions. It achieves up to 12 times the end-to-end throughput of IEEE 802.11, maintains a short delay and a low control overhead, and improves the fairness regardless of the hop count and the traffic load
Keywords :
access protocols; ad hoc networks; distributed control; telecommunication congestion control; telecommunication traffic; wireless LAN; IEEE 802.11; MAC layer control frame; distributed flow control; downstream nodes; end-to-end throughput; medium access control; medium contention; network congestion; traffic load; upstream nodes; wireless multihop ad hoc networks; Ad hoc networks; Distributed control; Media Access Protocol; Spread spectrum communication; Telecommunication traffic; Throughput; Wireless LAN; Wireless communication; Wireless mesh networks; Wireless sensor networks; Wireless ad hoc networks; flow control; interflow contention.; intraflow contention; medium access control;
Journal_Title :
Mobile Computing, IEEE Transactions on
DOI :
10.1109/TMC.2006.166