{"title":"Layered Preambles based on NOMA for MTC with Two Different Types of Devices","authors":"Jinho Choi","doi":"10.1109/VTC2021-Spring51267.2021.9448701","DOIUrl":null,"url":null,"abstract":"In machine-type communication (MTC), random access has been employed for a number of devices and sensors to access uplink channels using a pool of preambles. To support different priorities, random access can be generalized with multiple resource blocks (RBs), which however results in a poor spectral efficiency. In this paper, in order to achieve a high spectral efficiency, random access with layered preambles (RALP) is proposed so that devices of two different priorities, namely type-1 and type-2 devices, can co-exist within one RB based on the notion of power-domain non-orthogonal multiple access (NOMA).","PeriodicalId":194840,"journal":{"name":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","volume":"17 5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/VTC2021-Spring51267.2021.9448701","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
In machine-type communication (MTC), random access has been employed for a number of devices and sensors to access uplink channels using a pool of preambles. To support different priorities, random access can be generalized with multiple resource blocks (RBs), which however results in a poor spectral efficiency. In this paper, in order to achieve a high spectral efficiency, random access with layered preambles (RALP) is proposed so that devices of two different priorities, namely type-1 and type-2 devices, can co-exist within one RB based on the notion of power-domain non-orthogonal multiple access (NOMA).