Energy Minimization in OFDMA Downlink Systems: A Sequential Linear Assignment Algorithm for Resource Allocation

Author

Joung, Jingon ; Ho, Chin Keong ; Tan, Peng Hui ; Sun, Sumei

Author_Institution

Inst. for Infocomm Res. (I2R), A*STAR, Singapore, Singapore

Volume

1

Issue

4

fYear

2012

fDate

8/1/2012 12:00:00 AM

Firstpage

300

Lastpage

303

Abstract

We propose a sequential linear assignment algorithm (SLAA) for resource allocation of OFDMA systems consisting of M users and N (N >; M) resource blocks, with the aim of achieving near optimal energy consumption with polynomial complexity. The proposed SLAA allocates subchannels through a linear assignment algorithm (LAA), sequentially; thus, it requires O(MN²(N - M)²) complexity. From numerical results, the required power from the proposed assignment is observed to be within around 0.4 % of the lower bound of minimum possible power required to achieve the same target rates.

Keywords

OFDM modulation; minimisation; polynomials; resource allocation; OFDMA downlink systems; energy minimization; near optimal energy consumption; polynomial complexity; resource allocation; resource blocks; sequential linear assignment algorithm; Complexity theory; Minimization; Polynomials; Resource management; Search problems; Upper bound; Wireless communication; Energy efficiency; OFDMA; frequency resource allocation; linear assignment algorithm;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/WCL.2012.042512.120066

Filename

6191299