Backpressure-based Resource allocation for buffer-aided underlay D2D networks
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Device-to-device communication underlaying a cellular infrastructure has been proposed as a means of taking advantage of physical proximity of communicating devices, increased resource utilisation and improving cellular coverage. In this work, the system model assumes bursty arrival of packets at the mobile devices and allows each device to act as a relay for other sources. For relaying purpose, each device maintains two buffers, one for queuing exogenous data arriving at that device, and the other for queuing relay data coming from other devices. The rate stability of queues in the network in a D2D scenario with limited interdependence is considered and the system rate region is characterised. An online scheduling algorithm for resource allocation is formulated, taking into consideration energy control, which we show to be throughput optimal.
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