A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system

Hossam Fattah, Hussein Alnuweiri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Orthogonal Frequency Division Multiple Access (OFDMA) is an efficient access technique that allocates different subcarriers to multiple users where each subcarrier is loaded with a number of bits belonging to that user. Allocating subcarriers and bits to multiple users has been the focus of many algorithms that attempt to maximize the throughput or minimize the total transmit power used. Non-real time applications such as web browsing are dominant applications in most of the emerging wireless networks. A key performance measure of such applications is the average packet delay provided by the network. In this paper, we propose a novel Load Adaptive (LA) algorithm for non-real time services that allocates the subcarriers and bits to each user according to its individual load and the available transmit power so as to minimize the overall average packet delay for all users. The algorithm takes into account queueing theory and the quality of service requirement of each user. Numerical results show that the overall average packet delay of the proposed algorithm is significantly reduced compared to other algorithms.

Original languageEnglish
Title of host publicationProceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09
Pages642-646
Number of pages5
DOIs
Publication statusPublished - 11 Dec 2009
Externally publishedYes
Event2009 6th International Symposium on Wireless Communication Systems, ISWCS'09 - Tuscany, Italy
Duration: 7 Sep 200910 Sep 2009

Other

Other2009 6th International Symposium on Wireless Communication Systems, ISWCS'09
CountryItaly
CityTuscany
Period7/9/0910/9/09

Fingerprint

Frequency division multiple access
Queueing theory
Adaptive algorithms
Wireless networks
Quality of service
Throughput
time
performance

Keywords

  • IEEE 802.16
  • OFDM
  • OFDMA
  • Queueing analysis
  • Subcarrier allocation
  • WiMAX
  • Wireless networks

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

Cite this

Fattah, H., & Alnuweiri, H. (2009). A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system. In Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09 (pp. 642-646). [5285312] https://doi.org/10.1109/ISWCS.2009.5285312

A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system. / Fattah, Hossam; Alnuweiri, Hussein.

Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09. 2009. p. 642-646 5285312.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fattah, H & Alnuweiri, H 2009, A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system. in Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09., 5285312, pp. 642-646, 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09, Tuscany, Italy, 7/9/09. https://doi.org/10.1109/ISWCS.2009.5285312
Fattah H, Alnuweiri H. A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system. In Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09. 2009. p. 642-646. 5285312 https://doi.org/10.1109/ISWCS.2009.5285312
Fattah, Hossam ; Alnuweiri, Hussein. / A load adaptive subcarrier and bit allocation algorithm for non-real time services in an OFDMA system. Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09. 2009. pp. 642-646
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