A Preamble Collision Resolution Scheme via Tagged Preambles for Cellular IoT/M2M Communications

TL;DR

This paper introduces a collision resolution scheme for cellular IoT/M2M communications that uses tagged preambles and multiple timing advance values to improve random access success rates, especially for stationary devices.

Contribution

It presents a novel PACR scheme utilizing tagged preambles and multiple TA values to effectively resolve preamble collisions in cellular IoT/M2M networks.

Findings

Significantly improves RA success probability for stationary nodes

Enables collided nodes to complete RAs using exclusive data blocks

Enhances efficiency of random access procedures in IoT/M2M

Abstract

In this paper, we propose a preamble (PA) collision resolution (PACR) scheme based on multiple timing advance (TA) values captured via tagged PAs. In the proposed PACR scheme, tags are embedded in random access (RA) PAs and multiple TA values are captured for a single detected PA during a tag detection procedure. The proposed PACR scheme significantly improves RA success probability for stationary machine nodes since the nodes using collided PAs can successfully complete the corresponding RAs using exclusive data resource blocks.