Design and Performance Analysis of a Novel Distributed Queue Access Protocol for Cellular-Based Massive M2M Communications

Abstract

This paper proposes a novel access protocol based on the distributed queue (DQ) mechanism to effectively tackle the massive access issue in the cellular-based machine-to-machine (M2M) communications. To fully take the advantage of the DQ mechanism, we newly propose a method to avoid the DQ's inherent over-division problem by letting the base station first roughly probes the number of colliding devices in a random access opportunity. Based on the probing result, the base station then randomly divides these devices into a determined number of groups and “pushes”these groups to the end of a logical access queue. In addition, we develop an analytic model to accurately estimate the average access delay of the proposed protocol in the massive scenarios. Computer simulations are also performed to validate the correctness of the analytic model as well as the effectiveness of the proposed protocol in comparison with the LTE standard and conventional DQ access schemes.

Keywords

• Distributed queue
• load estimation
• LTE
• massive M2M communications
• random access protocols