Using Directional Antennas for Power Controlled Multiple Access Protocol in Ad Hoc Networks  

作　　者：ZHOU Xiaodong LI Jiandong LIN Yu 

机构地区：[1]State Key Laboratory of ISN, Information Science Insitute, Xidian University, Xi＇an 710071, China [2]Troop 94188, Xi＇an 710077, China

出　　处：《Chinese Journal of Electronics》2006年第3期504-509,共6页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.60372048） and Microsoft Research Asia, TRAP0YT, the Sixth Project of the NSFC Key Project （No.60496316）, the Chinese National ＂863＂ Project on Cognitive Radio （No.2005AA123910）, and the Key Project of Chinese M0E （No.104171）.

摘　　要：The main advantage of using directional antennas in ad hoc networks is due to the higher gain from its directivity, which can be utilized to reduce interference and thereby improve the network capacity. However, the negative problems such as side lobe interference and hidden terminals which exist in the directional networks may offset this advantage. In order to maximally save the average power consumption in the network, we propose a Busy tone and Directional antenna multiple access protocol with power control （BT-DMACP）. Based on an adaptive interference estimation algorithm, our protocol maintains a minimum transmission power level for effective transmission of packets under the case of side lobe and multiple access interference. Meanwhile, the hidden terminal problems are resolved by transmission of the directional busy tone signals from the communication nodes. Simulation results show that our proposed protocol can effectively support the application of directional antennas and provide higher channel utilization and lower energy consumption.

关 键 词：Directional antennas Power control Busy tone Multiple access protocol Channel utilization. 

分 类 号：TN929.53[电子电信—通信与信息系统]