A Threshold-Based Channel State Feedback Algorithm for Modern Cellular Systems
Hassel, V.; Gesbert, D.; Alouini, M.-S.; Oien, G.E.
Wireless Communications, IEEE Transactions on
Volume 6, Issue 7, July 2007 Page(s):2422 - 2426
Digital Object Identifier   10.1109/TWC.2007.051052
Summary:In this paper we propose a channel state feedback algorithm that uses multiple feedback thresholds to reduce the number of users transmitting feedback to a minimum. The users are polled with lower and lower threshold values and only the users that are above a threshold value transmit feedback to the base station. We show how this feedback algorithm can be used for any scheduling algorithm and show how closed-form expressions for the optimal threshold values can be obtained for two well-known scheduling algorithms. Finally, we propose a two-step optimization procedure for optimizing the feedback algorithm for real-life cellular standards.

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