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Title

Broadcast Channels with Cooperating Receivers: a Downlink for the Sensor Reachback Problem.

Authors

R. Dabora, S. D. Servetto.

Status

In the Proceedings of the IEEE International Symposium on Information Theory (ISIT), Chicago, IL, June-July 2004.

Abstract

We consider a problem of communicating over broadcast channels with partially cooperating receivers. In our setup receivers are able to exchange messages over a conference channel, prior to making a decision on what was the message sent by the transmitter. This problem comes up naturally in a sensor networking application, where a transmitter external to the sensor network wants to download data into the network to, e.g., configure the sensor array. In this paper, we formulate the general problem of broadcast with cooperation, and we find the exact capacity region for the case when the broadcast channel is degraded. This region is a strict enlargement of the Cover/Bergmans/Gallager region for the degraded broadcast channel without cooperation.

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