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The performance of traditional TCP congestion control protocol degrades when congestion and contention increase in ad hoc networks that use the IEEE 802.11 DCF. Many of the problems result from medium contention at the media access control (MAC) layer. In this paper, we present a new contention-based congestion control (CBCC) method according to a novel congestion information from MAC layer. This...
In this paper, a collision-free on-demand multiple access (CF-ODMA) protocol for mobile ad hoc networks is proposed. In the CF-ODMA protocol, every node obtains collision-free polling service by channel reservation. In addition, a collision resolution algorithm is presented to guarantee that in the present of reservation collisions the access nodes can successfully access channel in sequence, and...
An upstream congestion control (UCC) protocol based on cross-layer design is proposed to reduce packet losses and energy waste due to a large number of retransmissions and packet drops. The UCC protocol takes advantage of unoccupied buffer size and traffic rate at MAC layer as congestion level indication, and based on which, every upstream traffic rate is adjusted at network layer with its source...
Congestion in wireless sensor networks (WSNs) can lead to packet losses, delay, and energy waste due to a large number of retransmissions and packet drops. It is necessary to carry out congestion control which detects congestion precisely and regulates it fairly. To achieve this objective, an upstream hop-by-hop congestion control (UHCC) protocol based on cross-layer design is proposed. Unlike existing...
Based on the comparison of congestion control between aeronautical telecommunication network (ATN) and IP network, a new congestion avoidance model considering the explicit congestion notification (ECN) in ATN over IP scheme, called explicit congestion notification in tunnel (ECNT) model, is proposed in this paper. In addition, a new ECN/CE mapping algorithm to map ECN signal in IP sub-network onto...
Based on the concept of contention reservation for polling transmission and collision prevention strategy for collision resolution, a fair on-demand access (FODA) protocol for supporting node mobility and multihop architecture in mobile ad hoc networks is proposed. In the protocol, a distributed clustering architecture and an idea of reserving channel resources to get polling service are adopted,...
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