Resource scheduling in SC-FDMA based relay wireless sensor networks

We study the resource scheduling for Wireless Sensor Network (WSN) based on Single Carrier Frequency Division Multiple Access (SC-FDMA) technique. This work distinguishes itself from the existing work in: 1) the scheduling for a relay network, 2) the scheduling for multimedia-enabled sensor nodes taking into account diverse QoS characteristics such as delay sensitive (DS), rate sensitive (RS), best effort (BE) and different BER requirements, and 3) more comprehensive resource scheduling considering frame segmentation, power, modulation, resource unit allocation, rate, delay, BER, etc. We propose to maximize the effective transmission rate of a relay network by jointly considering frame segmentation, resource block allocation, power distribution and modulation selection. We cater to the heterogeneous QoS requirements for a widespread kind of wireless sensor nodes. We prove the NP-hardness of the problem and propose an adaptive resource scheduling algorithm (ARSA) with superior performance. We demonstrate the superiority of the proposed ARSA scheme in terms of throughput, packet drop rate, QoS satisfaction and the computational complexity by comparing it with several state-of-the-art resource allocation mechanisms.