By Topic

Energy efficiency and queue stability in a two-way relay network

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Zhi Chen ; Dept. of Electr. & Comp. Eng., Nat. Univ. of Singapore, Singapore, Singapore ; Teng Joon Lim ; Mehul Motani

In a recent paper, we demonstrated the minimization of instantaneous energy in a two-way relay network with digital network coding at the relay, through the optimization of the time-sharing fractions for each mode of transmission. In that work, the channel gains were assumed to be changing so slowly with time that queue stability required instantaneous channel throughput to be no smaller than the average packet arrival rate. In this paper, we obtain a water-filling solution that minimizes the long-term average (or ergodic) energy required to deliver any given pair of required rates while maintaining queue stability at all three nodes, in a fading channel. We also provide a detailed analysis of the queues at the relay using a random scheduling method that closely approximates the theoretical design of the deterministic algorithm, through a two-dimensional Markov chain model.

Published in:

Communication Systems (ICCS), 2012 IEEE International Conference on

Date of Conference:

21-23 Nov. 2012