QoS-based MAC protocol for cognitive radio networks
基于QoS的认知无线电网络MAC协议(英文)作者机构:东南大学移动通信国家重点实验室南京210096
出 版 物:《Journal of Southeast University(English Edition)》 (东南大学学报(英文版))
年 卷 期:2012年第28卷第4期
页 面:375-379页
核心收录:
学科分类:080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术(可授工学、理学学位)] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统]
基 金:The National Science and Technology Major Project( No. 2010ZX03006-002-01 ) the National Basic Research Program of China ( 973 Program) ( No. 2011CB302905) the Science and Technology Support Program of Jiangsu Province ( No. BE2011177)
主 题:quality of service (QoS) cognitive radio media access control (MAC) channel map Markov chain
摘 要:In order to improve the throughput performance of the secondary users (SUs) in the cognitive radio (CR) environment, a quality of service (QoS) based media access control (MAC) protocol is proposed. In this protocol, the CR node maps the channel state as a vector, and the transmitter and the receiver obtain the final channel map through an AND operation to prepare for an optional channel set. Data from the upper application layer are classified into two priority levels according to the QoS requirement. The data of each level relate to different contention windows so that the priority of real time data can be guaranteed. A two-dimensional discrete-time Markov chain is utilized to evaluate the system performance, and mathematical expressions of the system throughput are derived. Simulation results show that compared with the IEEE 802. 11 distributed coordination function (DCF), the proposed MAC protocol can achieve higher throughput.