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Multichannel NOMA-ALOHA game with fading

journal contribution
posted on 2018-10-01, 00:00 authored by Jinho ChoiJinho Choi
Non-orthogonal multiple access (NOMA) can improve the spectral efficiency by exploiting the power domain and successive interference cancellation, and in order to improve the throughput, it can be applied to random access that plays a crucial role in the Internet of Things to support connectivity for a number of devices with sparse activity. In this paper, we formulate a game when NOMA is applied to ALOHA to decide users' access or transmission probabilities. We consider a payoff function based on an energy-efficiency metric and drive the mixed strategy Nash equilibrium (NE). Once the NOMA-ALOHA game is successfully formulated, we generalize it to take into account users' different fading and multiple orthogonal channels, which might be necessary for NOMA-ALOHA to support a number of users in a realistic environment. A distributed algorithm based on gradient play is derived to find the mixed strategy NE (or transmission probabilities) of multichannel NOMA-ALOHA with fading.

History

Journal

IEEE transactions on communications

Volume

66

Issue

10

Pagination

4997 - 5007

Publisher

IEEE

Location

Piscataway, N.J.

ISSN

0090-6778

eISSN

1558-0857

Language

Eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2018 IEEE.