A Closed-Form Expression of Optimal Time for Two-Way Relay Using DF MABC Protocol

Author

Yeonggyu Shim ; Hyuncheol Park

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

Volume

18

Issue

5

fYear

2014

fDate

May-14

Firstpage

721

Lastpage

724

Abstract

In this paper, we propose the optimal time allocation for two-way relay using decode-and-forward (DF) multiple access broadcast (MABC) protocol. We analytically determine the optimal transmit time durations for the first and the second time slots, which maximize the achievable sum rate under a sum time constraint for a given squared magnitude of the channel coefficients and transmit power values. Numerical results show that the achievable sum rate of the optimal time allocation is greater than or equal to that of the equal time allocation.

Keywords

access protocols; decode and forward communication; relay networks (telecommunication); wireless channels; DF MABC protocol; channel coefficients; closed form expression; decode-and-forward; equal time allocation; multiple access broadcast; optimal time allocation; optimal transmit time durations; squared magnitude; sum time constraint; two way relay; Channel state information; Closed-form solutions; Protocols; Relays; Resource management; Stability analysis; Time factors; Two-way relay channel; decode-and-forward; time allocation;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.022514.132755

Filename

6774412