Decentralized multilevel power allocation for random access

Huifa Lin, Koji Ishibashi, Won Yong Shin, Takeo Fujii

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, we introduce a distributed power allocation strategy for random access, that has the capabilities of multipacket reception (MPR) and successive interference cancellation (SIC). The proposed random access scheme is suitable for machine-to-machine (M2M) communication application in fifth-generation (5G) cellular networks. A previous study optimized the probability distribution for discrete transmission power levels, with implicit limitations on the successful decoding of at most two packets from a single collision. We formulate the optimization problem for the general case, where a base station can decode multiple packets from a single collision, and this depends only on the signal-to-interference-plusnoise ratio (SINR). We also propose a feasible suboptimal iterative perlevel optimization process; we do this by introducing relationships among the different discrete power levels. Compared with the conventional power allocation scheme with MPR and SIC, our method significantly improves the system throughput; this is confirmed by computer simulations.

Original languageEnglish
Pages (from-to)1978-1987
Number of pages10
JournalIEICE Transactions on Communications
VolumeE98B
Issue number10
DOIs
Publication statusPublished - 2015 Oct 1

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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