定向Adhoc网络MAC组网技术研究  

MAC Layer Networking Technology in Ad hoc Network with Directional Antennas

作　　者：景中源 曾浩洋[1] 李大双[1] 张浪[1] 

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2014年第9期1041-1047,共7页Communications Technology

摘　　要：定向天线利用数字信号处理技术产生空间定向波束,将发射信号能量集中在某一个或者某些特定的方向上进行辐射,其应用于传统的Ad hoc网络中能够有效减少相邻节点间的互干扰,并能通过增加同时传输的节点对数达到显著提升网络空间复用率和容量的目的。首先简单介绍了定向天线和定向通信特点,然后对定向Ad hoc网络MAC层组网关键技术进行了综述,并对定向邻居发现协议、空分TDMA动态时隙分配机制、定向波束对准与跟踪技术等进行介绍和梳理,最后总结现有研究不足并指出未来重点研究方向。Directional antenna produces spatial directional beams with digital signal processing technology, and radiates the signal energy in a certain or some special directions. When applied in traditional ad hoc network,directional antennas can dramatically reduce the interference between neighboring nodes and by increasing the node pairs for simultaneous transmissions,enhance the spatial reuse rate and capacity of the network. Firstly,the basic characteristics of directional antennas and directional communications are briefly introduced in this paper. Then the key networking technologies of directional ad hoc network in MAC layer, such as the protocol of neighbor discovery, TDMA and directional beam pointing and tracking,are summa-rized. Finally,problems in research and development are discussed in detail.

关 键 词：移动自组网 定向天线 MAC层 邻居发现 波束对准与跟踪 

分 类 号：TN929.5[电子电信—通信与信息系统]