Effects of Heterogenous Mobility on Rate Adaptation and User Scheduling in Cellular Networks With HARQ
2013 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 62, no 6, 2735-2748 p.Article in journal (Refereed) Published
In this paper, we investigate the effects of heterogeneous mobility on rate adaptation and user scheduling in cellular networks with hybrid automatic repeat request (HARQ). To this end, we first show the performance tradeoff between two extreme scheduling criteria: retransmission-oriented scheduling (ROS) and mixed scheduling (MS) criteria over time-correlated Rayleigh fading channels. Then, we propose an ROS-based joint rate adaptation and user scheduling (JRAUS) policy for cellular networks and compare it with the conventional and reference JRAUS policies. We also evaluate the system-level performance of the proposed ROS-based JRAUS policy in various user distribution and mobility scenarios. In particular, in an asymmetric user distribution and heterogeneous mobility scenario, which is the most general one in practice, the proposed JRUAS policy yields a throughput gain of 49% and a fairness gain of 155% over the conventional JRAUS policies. In this paper, we find that the rate adaptation is significant not only in a single point-to-point link but in multiuser systems with heterogeneous mobility as well.
Place, publisher, year, edition, pages
2013. Vol. 62, no 6, 2735-2748 p.
Hybrid automatic repeat request (HARQ), mobility, multiuser environment, rate adaptation, user scheduling
Telecommunications Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-125860DOI: 10.1109/TVT.2013.2250533ISI: 000321932300029ScopusID: 2-s2.0-84880545214OAI: oai:DiVA.org:kth-125860DiVA: diva2:641255
QC 201308162013-08-162013-08-152013-08-16Bibliographically approved