Power allocation for multi-point joint transmission with different node activeness

Author

Jingya Li ; Makki, Behrooz ; Svensson, Tommy ; Eriksson, Thomas

Author_Institution

Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden

fYear

2013

fDate

7-10 April 2013

Firstpage

4220

Lastpage

4225

Abstract

We study the power allocation problem for the downlink of a cooperative system with different node activeness, i.e., each receiving node requests for data transmission according to a certain probability. Data symbols of the active nodes are jointly transmitted from cooperative transmission points using zero-forcing precoding. The problem is cast in form of maximizing the ergodic achievable rate subject to per-transmit-point average total power constraints. The derived power allocation indicates that depending on the channel conditions and receiving nodes´ activation probability, the optimal solution takes the form of either greedy power allocation or power sharing allocation.

Keywords

cooperative communication; data communication; activation probability; active nodes; channel conditions; cooperative system; cooperative transmission points; data transmission; downlink; ergodic achievable rate; greedy power allocation; multipoint joint transmission; node activeness; optimal solution; per-transmit-point average total power constraints; power allocation; power sharing allocation; receiving node requests; receiving nodes; zero-forcing precoding; Cooperative systems; Data communication; Downlink; Interference; Joints; Resource management; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2013 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-5938-2

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2013.6555255

Filename

6555255