Threshold based distributed flow control scheme in wireless Ad Hoc networks
LI Shan-ping Fu Yong-sheng · Journal of Zhejiang University(Engineering Science) · 2011
In wireless Ad Hoc networks,when a couple of flows pass through a single relaying node,the severe contention for the bandwidth between flows may block the communication between source nodes and destination nodes and starve the flows with lower priority.Most of the existing flow control schemes depend on the passive timeout message for flow block and starvation.To address this issue,a threshold based distributed flow control(TDFC) scheme was proposed based on setting the blocking threshold for blocking detection.In TDFC,the packets of greedy data flows are blocked by the relaying nodes.Thus,greedy behaviors can be suppressed effectively.Each relaying node sets the block threshold for each flow and then the communication congestion can be detected immediately.In addition,by comparison with IEEE 802.11 EDCA,TDFC can implement the fairness between flows,reduce the flow block and improve the network throughput by 20%.