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The delivery of service differentiation in mobile ad hoc networks presents a number of technical challenges because of the inherent constraints due to the dynamic nature of these environments, such as limited bandwidth and energy capacity. This paper proposes a cross-layer architecture for implementing DiffServ (CLAD) in IEEE 802.11 based mobile ad hoc networks. This provides differentiated services to four types of applications: conversation, streaming, interactive, and best-effort, by defining per hop behaviours (PHBs). Novel features of CLAD include a least busy routing protocol (LBRP) which is designed to discover the least busy routes and evenly distribute the network load; a hybrid signalling system which is used to dynamically monitor route states and to regulate adaptive real time applications; and an adaptive rate controller which controls traffic rate. Preliminary simulation results demonstrate that CLAD can provide efficient service differentiation in MANETs.
Wireless Networks, Communications and Mobile Computing, 2005 International Conference on (Volume:2 )
Date of Conference: 13-16 June 2005