2016/11/29 by Masoumeh Sadeghi, Sadeghi, Masoumeh, Amirmasoud Rabiei +1
Computer Science · Engineering · #Cooperative Communication and Network Coding #Advanced MIMO Systems Optimization #Wireless Communication Security Techniques
paper · pdf · doi:10.48550/arxiv.1611.09512
A new, fair relay selection scheme is proposed for a dual-hop\ndecode-and-forward network with randomly-distributed relays. Most of the\nreported works in the literature achieve fairness at the expense of degrading\nthe outage probability performance. In addition, they often assume that the\nnumber and locations of the relays are known. In contrast, the proposed scheme\nachieves fairness in a random field of relays without deteriorating the outage\nprobability performance. In this scheme, each relay maintains a countdown timer\nwhose initial value is a function of the relay location and a tunable parameter\nwhich controls the level of fairness. The optimum value of this parameter is\nevaluated in an offline manner so as to achieve fairness by making the average\npowers consumed by the relays as close as possible. An exact analytical\nexpression is derived for the average power consumed by each relay. This\nexpression is then used to show the superiority of the proposed scheme over\nopportunistic relaying and random relay selection schemes.\n