作　　者： ; ; ;

机构地区： 广东工业大学

出　　处： 《计算机工程与应用》 2011年第6期15-19,共5页

摘　　要： MIMO技术可以同时接收多个数据包并能对它们进行有效的分离,是改善Ad Hoc网络系统性能的新途径。提出一种利用MIMO系统中MPR能力来提高网络吞吐量的MAC协议。它通过在回复CTS前接收多个RTS来最大化可以同时发送的链路数,接收节点根据自身的天线数目和接收到的RTS数目决定发送数据流数目。与现有的同类协议相比,该协议可以无差错地接收并分离出多个节点同时发送的数据,且在同一竞争区域内,允许多对节点同时通信。在OPNET仿真软件中,从业务负载、节点场景密度对其进行了网络仿真,并在结果分析中验证了MIMO MAC协议的综合性能优势。 MIMO systems are capable of capturing more than a single packet.Such a capability is known as multipacket reception,which is a new way to improve performance of Ad Hoc networks.To effectively enhance throughput of Ad Hoc networks, a novel MIMO MAC protocol with MIMO links that takes into account MPR is proposed.It can receive more than one RTS before responding CTS, which maximize transmit links simultaneously.Receiver determines links according to the number of antennas and RTS.Compared to the existing protocol, it can receive and separate data correctly from different transmitter,moreover it allows many communications at the same time in one competitive area.Finally,the simulations are implemented in terms of business load, node density in OPNET environment, the results show that MIMO MAC outperforms CSMA/CA and CSMA/CA（k）.

关 键 词： 网络 多入多出系统 多包接收 媒体接入控制协议

领　　域： [自动化与计算机技术] [自动化与计算机技术]