Power-Efficient Random Access Design for Machine Type Communication

Hai Yu,Jun Zou,Chen Xu

doi:10.3390/electronics7110286

Hai Yu, Jun Zou + Show 1 more

Open Access

https://doi.org/10.3390/electronics7110286

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Journal: Electronics	Publication Date: Oct 30, 2018
Citations: 1	License type: CC BY 4.0

Affiliation: Nanjing University of Science and Technology

Abstract

Machine type communication (MTC) is the key solution to the information exchange between devices. It is the fundamental part of the Internet of Things (IoT). MTC is quite different from the human type communication (HTC), as most of the MTC applications have low requirements on data rate and latency. However, the battery life or the power consumption are very critical to MTC. Therefore, one of the most important issues involving MTC is to provide an efficient method for an MTC device to access the cellular network due to the fact that the data transmission is triggered by the device in some MTC scenarios. We address the issues in the traditional random access procedure in the LTE system and propose a power-efficient random access signal design for MTC. We analyze the bandwidth selection under different coverage requirements and propose an effective bandwidth concept to enable a power optimized random access signal design for MTC.

Highlights

Over the past few decades, wireless communication has been mainly used for human devices, such as cell phones, laptops
The transmission time intervals (TTIs) for the LTE-nMTC access request signal to close the various coverage class links are summarized in Table 5 for reference
The random access procedure in LTE-eMTC is divided into four steps, including uplink and downlink, which will increase the access delay comparing to our one-step random access message design

Summary

Introduction

Over the past few decades, wireless communication has been mainly used for human devices, such as cell phones, laptops. We referred to this kind of communication scenario as human type communication (HTC) in which high data rate and low latency are the primary goals. Machine type communication (MTC) has gained substantial attention due to the requirement of the smart city [1,2,3,4]. There are three categories of communication technologies that can realize the MTC. The first of which is the unlicensed low power local area network (LAN) which is popular in smart homes, such as ZigBee, WiFi, and Z-Wave [5].

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