Outage Performance for Cognitive Two-Way Relaying Networks with Underlay Spectrum Sharing

This paper presents an analytical study on the outage performance of cognitive decode-and-forward (DF) two-way relaying networks with underlay spectrum sharing. The bidirectional protocol, i.e., two time-slot multiple access broadcast (MABC) and three time-slot time division broadcast (TDBC), are considered. We propose a definition of outage probability by jointly considering outage events in the whole transmission process and the exact outage probability expressions are given. For both the protocols, the dependence among the received signal- to-noise ratios (SNRs) in the broadcast phase is introduced due to the interference power constraint. The joint probability of the received SNRs is derived. Based on that, the closed-form solutions to outage probability for the two protocols are obtained. The theoretical analysis is verified by Monte-Carlo simulations. Results demonstrate that MABC can achieve better outage performance through optimal interference power distribution between the two secondary users.

[1]  Hyundong Shin,et al.  Cooperative Communications with Outage-Optimal Opportunistic Relaying , 2007, IEEE Transactions on Wireless Communications.

[2]  Baoyu Zheng,et al.  Exact outage probability for decode-and-forward two-way relaying with asymmetric traffics , 2010, The 2nd International Conference on Information Science and Engineering.

[3]  Yu-Dong Yao,et al.  A Cooperative Sensing Based Cognitive Relay Transmission Scheme Without a Dedicated Sensing Relay Channel in Cognitive Radio Networks , 2011, IEEE Transactions on Signal Processing.

[4]  Hong Ji,et al.  Optimal distributed relay selection in underlay cognitive radio networks: An energy-efficient design approach , 2011, 2011 IEEE Wireless Communications and Networking Conference.

[5]  Shi Jin,et al.  Outage Probability of Amplify-and-Forward Two-Way Relay Interference-Limited Systems , 2012, IEEE Transactions on Vehicular Technology.

[6]  Koduvayur P. Subbalakshmi,et al.  Dynamic Spectrum Access with QoS and Interference Temperature Constraints , 2007, IEEE Trans. Mob. Comput..

[7]  S. Leigh,et al.  Probability and Random Processes for Electrical Engineering , 1989 .

[8]  Patrick Mitran,et al.  Performance Bounds for Bidirectional Coded Cooperation Protocols , 2007, IEEE Transactions on Information Theory.

[9]  Kyounghwan Lee,et al.  Outage Performance of Cognitive Wireless Relay Networks , 2006 .

[10]  Guixia Kang,et al.  Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints , 2010 .

[11]  Ping Zhang,et al.  Outage Performance for Cognitive Relay Networks with Underlay Spectrum Sharing , 2011, IEEE Communications Letters.

[12]  Hyungjong Kim,et al.  Outage probability of cognitive amplify-and-forward relay networks under interference constraints , 2010, 2010 16th Asia-Pacific Conference on Communications (APCC).

[13]  Chau Yuen,et al.  Bi-Directional Multi-Antenna Relay Communications with Wireless Network Coding , 2008, VTC Spring 2008 - IEEE Vehicular Technology Conference.