Asymptotic Capacity of Large Relay Networks with Conferencing Links

Author

Huang, Chuan ; Jiang, Jinhua ; Cui, Shuguang

Author_Institution

Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA

Volume

60

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

1193

Lastpage

1198

Abstract

In this correspondence, we consider a half-duplex large relay network, consisting of one source-destination pair and N relay nodes, each of which is connected with a subset of the other relays via signal-to-noise ratio (SNR)-limited out-of-band conferencing links. The asymptotic achievable rates of two basic relaying schemes with the "p-portion" conferencing strategy are studied: For the decode-and-forward (DF) scheme, we prove that the DF rate scales as mathcal{O} ( log (N) ); for the amplify-and-forward (AF) scheme, we prove that it asymptotically achieves the capacity upper bound in some interesting scenarios as N goes to infinity.

Keywords

amplify and forward communication; decode and forward communication; AF scheme; DF rate scales; DF scheme; SNR-limited out-of band conferencing links; amplify-and-forward scheme; decode-and-forward scheme; half-duplex large relay network; large relay networks asymptotic capacity; p-portion conferencing strategy; relay nodes; relaying schemes; signal-to-noise ratio; source-destination pair; Delay; Numerical models; Random variables; Relays; Signal to noise ratio; Upper bound; Large relay networks; amplify-and-forward; asymptotic; conferencing; decode-and-forward;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2012.022712.110027

Filename

6162924