Quality-Oriented Adaptive Forwarding for Wireless Relaying

In this paper, an adaptive forwarding strategy for wireless networks with relays is introduced. The strategy evaluates the error probability of a received code word at a relay based on reliability information provided by a soft-output detector. It allows to adapt to changing channel conditions by switching between the amplify and forward and the decode and forward strategy and thus may help to decrease energy consumption and delay at the relays.

[1]  S.A. Jafar,et al.  Optimizing Soft Information in Relay Networks , 2006, 2006 Fortieth Asilomar Conference on Signals, Systems and Computers.

[2]  Peter Adam Hoeher,et al.  New Results on Monte Carlo Bit Error Simulation Based on the A Posteriori Log-Likelihood Ratio , 2003 .

[3]  J. Li,et al.  Decode-amplify-forward (DAF): a new class of forwarding strategy for wireless relay channels , 2005, IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005..

[4]  Branka Vucetic,et al.  Distributed Turbo Coding With Soft Information Relaying in Multihop Relay Networks , 2006, IEEE Journal on Selected Areas in Communications.

[5]  Frank H. P. Fitzek,et al.  Cooperation in Wireless Networks: Principles and Applications , 2006 .

[6]  Luc Vandendorpe,et al.  Soft decode and forward improves cooperative communications , 2007, 1st IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2005..

[7]  Peter A. Hoeher,et al.  Word Error Probability Estimation by Means of a Modified Viterbi Decoder , 2007, 2007 IEEE 66th Vehicular Technology Conference.

[8]  Mazen O. Hasna,et al.  End-to-end performance of transmission systems with relays over Rayleigh-fading channels , 2003, IEEE Trans. Wirel. Commun..

[9]  Gerhard Fettweis,et al.  On the performance of cooperative relaying protocols in wireless networks , 2005, Eur. Trans. Telecommun..