Duality and Stability Regions of Multi-rate Broadcast and Multiple Access Networks

Details Duality and Stability Regions of Multi-rate Broadcast and Multiple Access Networks Duality and Stability Regions of Multi-rate Broadcast and Multiple Access Networks

2007-06-11

arxiv.org/abs/0706.1399v1

Computer Science

Information Theory

12 pages, 11 figures, submitted to IEEE Trans. Information Theory for review

Scientific paper

We characterize stability regions of two-user fading Gaussian multiple access (MAC) and broadcast (BC) networks with centralized scheduling. The data to be transmitted to the users is encoded into codewords of fixed length. The rates of the codewords used are restricted to a fixed set of finite cardinality. With successive decoding and interference cancellation at the receivers, we find the set of arrival rates that can be stabilized over the MAC and BC networks. In MAC and BC networks with average power constraints, we observe that the duality property that relates the MAC and BC information theoretic capacity regions extend to their stability regions as well. In MAC and BC networks with peak power constraints, the union of stability regions of dual MAC networks is found to be strictly contained in the BC stability region.

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