Abstract
Summary form only given. In order to provide support for multimedia applications in mobile ad hoc networks (MANETs), quality of service (QoS) support becomes an important component in their design. In this paper, we present a dynamic range bandwidth reservation protocol for TDMA-based MANETs. In this protocol, a source node S, that needs to send data, sends a request message (QREQ) to reserve a QoS path to the desired destination node D. In the reservation message, the source node specifies a dynamic range [b/sub min/, b/sub max/] of the number of slots needed to transmit the data. The intermediate nodes along the path try to reserve a number of slots, b/sub cur/, that is equal to the maximum number of slots that are available within this range (b/sub min/ /spl ges/ b/sub cur/ /spl ges/ b/sub max/). The protocol also permits intermediate nodes to dynamically downgrade existing paths that are functioning above their minimum requirements in order to allow the successful reservation for the maximum number of requested paths. When the network traffic load is later decreased, the existing paths are able to be upgraded to function with higher bandwidth requirements. This allows the network to admit new QoS paths instead of denying such requests by allowing for graceful degradation of other paths. The paper also presents several optimization techniques which are designed to increase the efficiency and throughput of the network. This protocol allows a higher level of flexibility in providing and maintaining QoS support in MANETs.
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