Abstract
Mobile multimedia applications have recently attracted numerous interests in mobile ad hoc networks (MANETs) supporting quality-of-service (QoS) communications. Multiple non-interfering channels are available in 802.11- and 802.15-based wireless networks. Channel assignment depends on the available bandwidth at involved nodes and the bandwidth consumption required by a new flow. Predicting available bandwidth of a node in wireless networks is challenging due to the shared and open nature of the wireless channel. This paper proposes a traffic-predictive QoS on-demand routing(TPQOR) protocol to support QoS bandwidth and delay requirements. A distributed channel assignment scheme and routing discovery process are presented to support multimedia communication and to satisfy QoS bandwidth requirement. The proposed channel assignment and reuse schemes can reduce the channel interference and enhance channel reuse rate. The proposed bandwidth prediction scheme can estimate the bandwidth requirement of each node for future traffic by the history information of its channel usage. Unlike many existing routing protocols, we take the traffic prediction as an important factor in route selection. The simulation results show that TPQOR protocol can effectively increase throughput, reduce loss ratio as well as delay, and avoid the influences of future interference flows, as compared to AODV protocol for a different number of channels.
Highlights
In mobile ad hoc networks (MANETs), the topology of the network can change frequently and the network routing becomes a crucial task [1]; while routing with mobility prediction is well-studied, routing with traffic prediction is still considered as an open, but meaningful problem
Traffic routing and channel assignment jointly play a critical role in determining the performance of MANETs
traffic-predictive QoS ondemand routing (TPQOR) protocol uses channel reuse mechanism described in our previous work [18], in which we present a cross-layer protocol that solves channel assignment, reuse, and routing problem jointly
Summary
In mobile ad hoc networks (MANETs), the topology of the network can change frequently and the network routing becomes a crucial task [1]; while routing with mobility prediction is well-studied, routing with traffic prediction is still considered as an open, but meaningful problem. This is important for routing with quality-of-service (QoS) constraints, since QoS resourcereservations affect future network traffic. There have been significant progress in using mobility prediction to build a more stable route in MANETs, and some predictive and reliable routing schemes [2, 3] have been reported These accomplishments inspire us to study further on the design of a routing scheme with traffic prediction. One approach is based on traffic-predictive models, such as the method proposed
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