Generalized Compute-and-Forward Schemes for Multi-Hop Two-Way Relay Channels

Author

Gengkun Wang ; Wei Xiang ; Yafeng Wang

Author_Institution

Fac. of Eng. & Surveying, Univ. of Southern Queensland, Toowoomba, QLD, Australia

fYear

2013

fDate

2-5 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

Wireless network coding for multi-hop two-way relay channels (MH-TRC) has been proven to achieve a significantly improved network throughput than non- network coding (Non-NC) schemes. Our previous work showed that the multi-hop compute-and-forward (MH- CPF) scheme for the MH-TRC with fixed two transmission time intervals was unable to outperform Non-NC in the MH-TRC with an arbitrary number of nodes. In view of this fact, we propose an I-time- interval (I-TI) MH-CPF scheme (I represents the number of transmission time intervals) for the MH- TRC with arbitrary numbers of nodes and messages. By converting the transmission pattern to a corresponding characteristic matrix, the outage probability of the I-TI MH-CPF scheme is derived. We investigate the relationships between the numbers of nodes, messages and TIs with the outage probability. It is proven that L-1-TI MH-CPF can outperform 2-TI MH-CPF when the number of messages is large, while the MH-CPF scheme with a larger number of TIs has better outage performance than 2-TI MH-CPF in the MH-TRC with a small number of nodes.

Keywords

network coding; relay networks (telecommunication); wireless channels; characteristic matrix; compute and forward communication; multihop relay channel; outage probability; transmission pattern; transmission time interval; two way relay channel; wireless network coding; Educational institutions; Encoding; Numerical models; Probability; Relays; Throughput; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2013 IEEE 78th

Conference_Location

Las Vegas, NV

ISSN

1090-3038

Type

conf

DOI

10.1109/VTCFall.2013.6692212

Filename

6692212