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Mobile Information Systems
Volume 2016 (2016), Article ID 5187303, 16 pages
Research Article

Enhancing Radio Access Network Performance over LTE-A for Machine-to-Machine Communications under Massive Access

1Electrical and Electronic Engineering Department, University of Bristol, Bristol BS8 1UB, UK
2Digital Catapult, London NW1 2RA, UK

Received 29 July 2016; Revised 7 October 2016; Accepted 12 October 2016

Academic Editor: Ioannis Moscholios

Copyright © 2016 Fatemah Alsewaidi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The expected tremendous growth of machine-to-machine (M2M) devices will require solutions to improve random access channel (RACH) performance. Recent studies have shown that radio access network (RAN) performance is degraded under the high density of devices. In this paper, we propose three methods to enhance RAN performance for M2M communications over the LTE-A standard. The first method employs a different value for the physical RACH configuration index to increase random access opportunities. The second method addresses a heterogeneous network by using a number of picocells to increase resources and offload control traffic from the macro base station. The third method involves aggregation points and addresses their effect on RAN performance. Based on evaluation results, our methods improved RACH performance in terms of the access success probability and average access delay.