Rate Selection Algorithms for IR Hybrid ARQ

Author

Gopalakrishnan, Nandu ; Gelfand, Saul

Author_Institution

Alcatel-Lucent Inc., Whippany, NJ

fYear

2008

fDate

28-30 April 2008

Firstpage

1

Lastpage

6

Abstract

We obtain throughput expressions for an incremental redundancy (IR) hybrid ARQ (HARQ) system given delayed channel mutual information feedback using renewal process theory. We obtain the optimal rate selection algorithm for conditional throughput under a conditional outage constraint (due to finite horizon operation) in a single user scheduled per slot (non-adaptive) scenario. We compare performance with commonly employed other rate adaptation algorithms. We characterize the HARQ gain (and its components of time diversity and early termination) improving epsiv-outage capacity and study the impact of feedback and opportunistic scheduling at various mobile speeds.

Keywords

automatic repeat request; mobile computing; scheduling; telecommunication channels; automatic repeat request; delayed channel; hybrid ARQ; incremental redundancy; mobile speed; mutual information feedback; optimal rate selection; outage capacity; renewal process theory; scheduling; Automatic repeat request; Constraint optimization; Delay effects; Diversity reception; Fading; Feedback; Mutual information; Protocols; Quality of service; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Sarnoff Symposium, 2008 IEEE

Conference_Location

Princeton, NJ

Print_ISBN

978-1-4244-1843-5

Type

conf

DOI

10.1109/SARNOF.2008.4520072

Filename

4520072