Cooperative and opportunistic transmission for wireless ad hoc networks

Moving toward 4G, wireless ad hoc networks receive growing interest due to users’ provisioning of mobility, usability of services, and seamless communications. In ad hoc networks fading environments provide the opportunity to exploit variations in channel conditions, and transmit to the user with the currently “best” channel. In this article two types of opportunistic transmission, which leverage time diversity and multi-user diversity, respectively, are studied. Considering the co-channel interference and lack of a central controller in ad hoc networks, the “cooperative and opportunistic transmission” concept is promoted. For opportunistic transmission that exploits time diversity, it is observed that the inequality in channel contention due to the hidden terminal phenomenon tends to result in energy inefficiency. Under this design philosophy, we propose a distributed cooperative rate adaptation (CRA) scheme to reduce overall system power consumption. Taking advantage of th...

• Type: Journal
• Year: 2007
• Where: NETWORK
• Authors: Qian Zhang, Qing Chen, Fan Yang, Xuemin Shen, Zhisheng Niu
• Keywords: Ad Hoc Networks, NETWORK 2007, Opportunistic Transmission, Wireless Ad Hoc Networks