Coordinated Hybrid Automatic Repeat Request
Behrooz Makki, Tommy Svensson, Thomas Eriksson, Mohamed‐Slim Alouini · IEEE Communications Letters · 2014
We develop a coordinated hybrid automatic repeat request (HARQ) approach. With the proposed scheme, if a user message is correctly decoded in the first HARQ rounds, its spectrum is allocated to other users, to improve the network outage probability and the users' fairness. The results, which are obtained for singleand multiple-antenna setups, demonstrate the efficiency of the proposed approach in different conditions. For instance, with a maximum of M retransmissions and single transmit/receive antennas, the diversity gain of a user increases fromMto(J + 1)(M - 1) + 1 where J is the number of users helping that user.