Mobility

Joint Cooperative Relay Scheme for Spectrum efficient Usage and Capacity Improvement in Cognitive Radio Networks

Date Added: Mar 2012
Format: PDF

In order to improve the efficiency of spectrum resource usage and the capacity of wireless networks, cooperative relay techniques which utilize the vacant spectrum of primary users for secondary users' data transmission have been applied in cognitive radio networks. Considering the dynamic time-varying vacant spectrum resources and achievable rate on different channels at Relay Nodes (RN), the traditional fixed time slot allocation scheme for cooperative RNs has the bottleneck for further improving the spectrum usage efficiency and system throughput.