Layered Preambles based on NOMA for MTC with Two Different Types of Devices
Date
2021
Authors
Choi, J.
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Conference paper
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IEEE Vehicular Technology Conference, 2021, vol.2021-April, pp.9448701-1-9448701-5
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Jinho Choi
Conference Name
IEEE Vehicular Technology Conference (VTC) (25 Apr 2021 - 28 Apr 2021 : Helsinki, Finland)
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).
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© 2021 IEEE