Abstract
This paper proposes an optimal Admission Control (AC) scheme for Body Area Networks (BANs). The scheme captures BAN characteristics, such as limited buffer size and power consumption of sensor nodes, and QoS-sensitive heterogeneous traffic types. Unable to admit a new flow, the Hub initially considers a novel mechanism of adjusting some of the already admitted (or new) flows' connection parameters to free up enough bandwidth. Adjustment does not violate a flow's QoS requirements but comes at the cost of extra energy consumption. An efficient scheme is proposed that traverses viable adjustment options until the least costly is found. When adjustment does not suffice, a combination of adjusting a set of flows and terminating some existing ones is considered. For the flow termination scheme, a bandwidth-efficient algorithm is proposed that terminates the least number of flows that have lower priory than the one requesting to join. The optimality of the proposed AC scheme for BANs is also studied. Compared to conventional schemes, our results show on average an increase of up to 33% in the number -and considerable improvement in terms of the priority- of admitted flows, at a diminutive cost of less than 1.5% on the nodes' energy consumption.
Published Version
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