Self-Coexistence among IEEE 802.22 Networks: Distributed Allocation of Power and Channel

Self-Coexistence among IEEE 802.22 Networks: Distributed Allocation of Power and Channel

Blog Article

Ensuring self-coexistence among IEEE 802.22 networks is a challenging problem owing to opportunistic access of incumbent-free radio resources by users in co-located networks.In this here study, we propose a fully-distributed non-cooperative approach to ensure self-coexistence in downlink channels of IEEE 802.22 networks.

We formulate the self-coexistence problem as a mixed-integer non-linear optimization problem for maximizing the network data rate, which is an NP-hard one.This work explores a sub-optimal solution by dividing the optimization problem into downlink channel allocation and power assignment sub-problems.Considering fairness, quality of service and minimum interference for customer-premises-equipment, we also develop a greedy algorithm for channel allocation and a non-cooperative game-theoretic framework for near-optimal power allocation.The base stations of networks are treated as players in a game, where they try to increase spectrum utilization by controlling power and reaching a Nash equilibrium point.

We further develop a utility function for the game to depileve easy clean increase the data rate by minimizing the transmission power and, subsequently, the interference from neighboring networks.A theoretical proof of the uniqueness and existence of the Nash equilibrium has been presented.Performance improvements in terms of data-rate with a degree of fairness compared to a cooperative branch-and-bound-based algorithm and a non-cooperative greedy approach have been shown through simulation studies.