Connectivity of Multiple Cooperative Cognitive Radio Ad Hoc Networks

被引:40
作者
Ao, Weng Chon [1 ]
Cheng, Shin-Ming [1 ]
Chen, Kwang-Cheng [1 ,2 ]
机构
[1] Natl Taiwan Univ, Grad Inst Commun Engn, Taipei 10764, Taiwan
[2] Natl Taiwan Univ, Commun Res Ctr, Taipei 10764, Taiwan
关键词
cognitive radio networks; connectivity; cooperation; heterogeneous wireless networks; ad hoc networks; WIRELESS NETWORKS; INTERFERENCE; PERCOLATION; IMPACT;
D O I
10.1109/JSAC.2012.120204
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In cognitive radio networks, the signal reception quality of a secondary user degrades due to the interference from multiple heterogeneous primary networks, and also the transmission activity of a secondary user is constrained by its interference to the primary networks. It is difficult to ensure the connectivity of the secondary network. However, since there may exist multiple heterogeneous secondary networks with different radio access technologies, such secondary networks may be treated as one secondary network via proper cooperation, to improve connectivity. In this paper, we investigate the connectivity of such a cooperative secondary network from a percolation-based perspective, in which each secondary network's user may have other secondary networks' users acting as relays. The connectivity of this cooperative secondary network is characterized in terms of percolation threshold, from which the benefit of cooperation is justified. For example, while a noncooperative secondary network does not percolate, percolation may occur in the cooperative secondary network; or when a noncooperative secondary network percolates, less power would be required to sustain the same level of connectivity in the cooperative secondary network.
引用
收藏
页码:263 / 270
页数:8
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