A Modified Self-Scheduling Multi-channel Cognitive Radio MAC Protocol Based on Cooperative Communications
Rubeena, Indu Bala · International Conference on Advanced Computing · 2015
The most significant challenge for next wireless generation is to work opportunistically on the spectrum without a fixed spectrum allocation. The actual problem is not the scarcity of spectrum but inefficient allocation policies and usage. Cognitive Radio (CR) is the most promising technology to utilize the frequency spectrum by adapting its parameters such as operating frequency, power, modulation scheme, data rate etc. Various medium access (MAC) protocols have been proposed by researchers to manage the channel utilization between two kind of users namely licensed primary users and unlicensed secondary users. In this paper, SMC-MAC protocol is studied in detail and a modified self-scheduling multichannel cognitive radio MAC protocol based on cooperative communications is proposed to enhance the network throughput by modifying its frame structure. Numerical simulations have been done to support theoretical results.