Power allocation for F/TDMA multiuser two-way relay networks

We consider a multiuser two-way relay network where multiple pairs of users exchange information with the assistance of a relay node, using orthogonal channels per pair. For a variety of two-way relaying mechanisms, such as decode- and- forward (DF), amplify-and-forward (AF) and compress-and-forward (CF), we investigate the problem of optimally allocating relay's power among the user pairs it assists such that an arbitrary weighted sum rate of all users is maximized, and solve the problem as one or a set of convex problems for each relaying scheme. Numerical results are presented to demonstrate the performance of the optimum relay power allocation as well as the comparison among different two-way relaying schemes.

[1]  Yunnan Wu,et al.  Information Exchange in Wireless Networks with Network Coding and Physical-layer Broadcast , 2004 .

[2]  Min Chen,et al.  Resource management for wireless ad hoc networks , 2009 .

[3]  Aylin Yener,et al.  Relay assisted F/TDMA ad hoc networks: node classification, power allocation and relaying strategies , 2007, IEEE Transactions on Communications.

[4]  Sachin Katti,et al.  Embracing wireless interference: analog network coding , 2007, SIGCOMM.

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

[6]  Petar Popovski,et al.  Wireless network coding by amplify-and-forward for bi-directional traffic flows , 2007, IEEE Communications Letters.

[7]  J. Nayak,et al.  Rate regions for the separated two-way relay channel , 2008, 2008 46th Annual Allerton Conference on Communication, Control, and Computing.

[8]  Niklas Johansson,et al.  Coded Bi-directional Relaying , 2006, 2006 IEEE 63rd Vehicular Technology Conference.

[9]  S. Stanczak,et al.  Achievable Rates for the Restricted Half-Duplex Two-Way Relay Channel , 2007, 2007 Conference Record of the Forty-First Asilomar Conference on Signals, Systems and Computers.

[10]  Mokhtar S. Bazaraa,et al.  Nonlinear Programming: Theory and Algorithms , 1993 .

[11]  Min Chen,et al.  Multiuser two-way relaying: detection and interference management strategies , 2009, IEEE Transactions on Wireless Communications.

[12]  Armin Wittneben,et al.  Spectral efficient protocols for half-duplex fading relay channels , 2007, IEEE Journal on Selected Areas in Communications.