Media Access with Spatial Reuse for Cooperative Spectrum Sensing

• 作者: Harry Leib Xiao Shao
• 来源期刊: 无线传感网络(英文)
• 学科: 工学
• 关键词: COOPERATIVE SPECTRUM SENSING Wireless Sensor Network MEDIA ACCESS Spatial REUSE
• 年，卷（期）: 2017,（7）
• 页码范围: 205-237
• 页数: 33页
• 分类号: TN92

摘要

The increasing interest for wireless communication services and scarcity of radio spectrum resources have created the need for a more flexible and efficient usage of the radio frequency bands. Cognitive Radio (CR) emerges as an important trend for a solution to this problem. Spectrum sensing is a crucial function in a CR system. Cooperative spectrum sensing can overcome fading and shadowing effects, and hence increase the reliability of primary user detection. In this paper we consider a system model of a dedicated detect-andforward wireless sensor network (DetF WSN) for cooperative spectrum sensing with k-out-of-n decision fusion in the presence of reporting channels errors. Using this model we consider the design of a spatial reuse media access control (MAC) protocol based on TDMA/OFDMA to resolve conflicts and conserve resources for intra-WSN communication. The influence of the MAC protocol on spectrum sensing performance of the WSN is a key consideration. Two design approaches, using greedy and adaptive simulated annealing (ASA) algorithms, are considered in detail. Performance results assuming a grid network in a Rician fading environment are presented for the two design approaches.