Ad-hoc网络中一种低控制开销的多信道MAC协议  

A New Resource Assignment with Low Control Overheads for Multi-channel Ad-hoc Networks

作　　者：蔡凤梅[1] 邝育军[1] 

机构地区：[1]电子科技大学移动互联实验室,成都611731

出　　处：《电子与信息学报》2013年第5期1076-1082,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61071099)资助课题

摘　　要：针对Ad-hoc网络中多信道MAC机制引起的控制信道瓶颈问题和隐终端问题,该文提出一种低控制开销MAC协议(LCO-MAC)。与基于信道使用表一类的MAC机制不同,LCO-MAC参考Meshhadany提出的RTS/CTS(Request To Send/Clear To Send)信道分配机制,将数据信道映射为帧中时隙,但不同的是LCO-MAC不限制RTS的发送时间,且一旦申请信道后即可发送数据。仿真结果表明,LCO-MAC无需传输太多的控制信息用于预约信道,有效缓解了控制信道瓶颈问题和多信道隐终端问题,网络吞吐量也得到明显提升。Considering the control channel bottleneck issue and hidden terminal issue for multi-channel MAC in Ad-hoc networks,a new multi-channel MAC with the Low Control Overhead（LCO-MAC） is proposed.Different from the multi-channel MAC mechanism based on the channel usage table,for LCO-MAC reference to the Request To Send/Clear To Send（RTS/CTS） channel assignment mechanism proposed by Meshhadany,each data channel is mapped to a time slot of the control section,but the difference is that LCO-MAC does not restrict the sending time of the RTS,and can send data once obtainning the channel.Simulation results show that LCO-MAC not needing too much control information for channel reservation provides an effective solution to the control channel bottleneck and multi-channel hidden terminal issue,the network throughput is also significantly enhanced.

关 键 词：自组织网络 多信道MAC 控制信道瓶颈 低控制开销 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]