This paper studies the problem of relay-assisted user scheduling for downlink wireless transmission. The base station or access point employs hybrid automatic-repeat-request (HARQ) with the assistance of a set of fixed relays to serve a set of mobile users. By minimizing a cost function of the queue lengths at the base station and the number of retransmissions of the head-of-line packet for each user, the base station can schedule an appropriate user in each time slot and an appropriate transmitter to serve it. It is shown that a priority-index policy is optimal for a linear cost function with packets arriving according to a Poisson process and for an increasing convex cost function where packets must be drained from the queues at the base station.
@article{arxiv.0808.0745,
title = {Relay-Assisted User Scheduling in Wireless Networks with Hybrid-ARQ},
author = {Caleb K. Lo and John J. Hasenbein and Sriram Vishwanath and Robert W. Heath},
journal= {arXiv preprint arXiv:0808.0745},
year = {2016}
}
Comments
14 pages, 5 figures, submitted to the IEEE Transactions on Vehicular Technology in October 2008, revised in March 2009 and May 2009