IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Special Section on 5G Radio Access Networks - Part II: Multi-RAT Heterogeneous Networks and Smart Radio Technologies
Decentralized Multilevel Power Allocation for Random Access
Huifa LINKoji ISHIBASHIWon-Yong SHINTakeo FUJII
Author information
JOURNAL RESTRICTED ACCESS

2015 Volume E98.B Issue 10 Pages 1978-1987

Details
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-plus-noise ratio (SINR). We also propose a feasible suboptimal iterative per-level 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.

Content from these authors
© 2015 The Institute of Electronics, Information and Communication Engineers
Previous article Next article
feedback
Top