Power control for cooperative dynamic spectrum access networks with diverse QoS constraints

Dynamic spectrum access (DSA) is an integral part of cognitive radio technology aiming at efficient management of the available power and bandwidth resources. The present paper deals with cooperative DSA networks, where collaborating terminals adhere to diverse (maximum and minimum) quality-of-service (QoS) constraints in order to not only effect hierarchies between primary and secondary users but also prevent abusive utilization of the available spectrum. Peer-to-peer networks with co-channel interference are considered in both single- and multi-channel settings. Utilities that are functions of the signal-tointerference-plus-noise-ratio (SINR) are employed as QoS metrics. By adjusting their transmit power, users can mitigate the generated interference and also meet the QoS requirements. A novel formulation accounting for heterogeneous QoS requirements is obtained after introducing a suitable relaxation and recasting a constrained sum-utility maximization as a convex optimization pro...

• Type: Journal
• Year: 2010
• Where: TCOM
• Authors: Nikolaos Gatsis, Antonio G. Marqués, Georgios B. Giannakis
• Keywords: Cooperative Dsa Networks, Heterogeneous Qos Requirements, QoS Requirements, TCOM 2010