Fast Retrial for Low-Latency Connectivity in MTC with Two Different Types of Devices

TL;DR

This paper proposes a fast retrial scheme with an adaptive algorithm to support low-latency requirements for type-1 devices in machine-type communication, ensuring stability and efficient resource allocation.

Contribution

It introduces a novel fast retrial method with adaptive preamble allocation for mixed device types in MTC, supported by stability analysis and dynamic optimization.

Findings

Derived stability conditions for the proposed scheme.

Designed an adaptive algorithm for preamble allocation.

Validated the approach through theoretical analysis.

Abstract

In this paper, we consider co-existing two different types of devices in machine-type communication (MTC), namely type-1 and type-2 devices, where type-1 devices need short access delay for low-latency requirements, while type-2 devices are delay-tolerant. For short access delay, we study the use of fast retrial in preamble transmissions when a group of preambles is divided into two subsets to support two different types of devices. Stability conditions are derived using Foster-Lyapunov criteria in terms of arrival rates, the number of preambles, and the number of type-1 devices. We also propose an adaptive algorithm that dynamically decides the minimum number of preambles for type- 1 devices under stability conditions.