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In multihop ad hoc networks, TCP cannot effectively deal with the problem of packet drops caused by mobility and shared channel contention among wireless nodes. Mistaking these events for congestion degrades TCP performance. Hence we propose a new end-to-end mechanism, called TCP with Adaptive RTO+ (TCP-AR+), to assure faster recovery after non-congestion induced timeouts. TCP-AR+ comes to enhance...
Tremendous efforts have been conferred towards the congestion control concern in mobile wireless networks while dealing with maximizing both throughput and fair bandwidth allocation. Unfortunately, this is made limited by the variable and unpredictable behaviour of such networks. In this paper we propose a new congestion control mechanism for multimedia traffic in mobile wireless networks. Our proposed...
In a mobile ad hoc network, link failures and route changes occur frequently. Mistaking these events for congestion degrades TCP performance. Hence, TCP congestion control mechanisms should not react to such loss events. This paper deals with an enhancement of the congestion control mechanism, called TCP Adaptive RTO (TCP AR). This proposal relies on two basic concepts. First, it distinguishes routes...
The UDP transport protocol has been fore selected for the most of multimedia traffic transport on mobile wireless networks. Nevertheless, it exhibits some problems related to bandwidth sharing between several traffic sources, as well as TCP friendliness with established TCP connections on the network. In this paper, we propose a combined mechanism, the PRDR: proportional and derivative algorithm for...
In a mobile ad hoc network, temporary link failures and route changes occur frequently. With the assumption that all packet losses are due to congestion, TCP performs poorly in such an environment. This paper proposes a new mechanism called TCP adaptive RTO (TCP AR), that improves TCP performance in mobile ad hoc networks. TCP AR distinguishes routes failures from network congestion and adapts the...
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