On the energy delay tradeoff of HARQ-IR in wireless multiuser systems

Author

Choi, Jinho

Author_Institution

College of Engineering, Swansea University

fYear

2012

fDate

10-15 June 2012

Firstpage

3920

Lastpage

3924

Abstract

Energy delay tradeoff (EDT) is a fundamental tradeoff that can play a crucial role in understanding the energy efficiency of various transmission schemes. For hybrid automatic repeat request (HARQ) protocols, EDT can be well defined. In this paper, in order to understand the EDT for wireless multiuser systems, we consider downlink channels where the HARQ with incremental redundancy (HARQ-IR) protocol is employed for reliable transmissions to users. For a given total power, the power allocation is studied and its impact on EDT is investigated. It is shown that the multiuser diversity (MD)-based power allocation becomes preferable when a long effective delay is allowed.

Keywords

automatic repeat request; delays; radio networks; redundancy; wireless channels; EDT; HARQ with incremental redundancy protocol; HARQ-IR protocol; MD-based power allocation; downlink channels; energy delay tradeoff; energy efficiency; hybrid automatic repeat request protocols; long effective delay; multiuser diversity based power allocation; wireless multiuser systems; Delay; Downlink; Fading; Protocols; Resource management; Signal to noise ratio; Wireless communication; energy efficiency; hybrid automatic repeat request (HARQ); power allocation;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2012 IEEE International Conference on

Conference_Location

Ottawa, ON

ISSN

1550-3607

Print_ISBN

978-1-4577-2052-9

Electronic_ISBN

1550-3607

Type

conf

DOI

10.1109/ICC.2012.6363694

Filename

6363694