Rate optimization for relay-assisted downlink cellular systems using superposition coding

Author

Rini, Stefano ; Ghaghanidze, Levan ; Kurniawan, Edi ; Goldsmith, Andrea

Author_Institution

Tech. Univ. Munchen, Munich, Germany

fYear

2013

fDate

9-13 June 2013

Firstpage

5371

Lastpage

5375

Abstract

A downlink cellular system in which multiple relays assist the transmission of the base station is considered. Cooperation strategies based on superposition coding are derived for this network. Superposition coding is attained by sending each message to one or more relays while satisfying the rate constraints of the base station-to-relay links. The chain graph representation of achievable schemes is used to maximize the network throughput over the set of feasible transmission strategies based on superposition coding. Rate advantages as compared to the non-cooperative scenario are obtained under varying relay positions and available power at the base station and relay nodes.

Keywords

cellular radio; graph theory; network coding; optimisation; relay networks (telecommunication); base station; base station-to-relay links; chain graph representation; cooperation strategy; multiple relays; network throughput; noncooperative scenario; rate optimization constraint; relay nodes; relay-assisted downlink cellular systems; superposition coding strategy; Decoding; Downlink; Encoding; Interference; Receivers; Relays; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2013 IEEE International Conference on

Conference_Location

Budapest

ISSN

1550-3607

Type

conf

DOI

10.1109/ICC.2013.6655442

Filename

6655442