Resource allocation algorithms for OFDM based wireless systems

Soheil Rostami; Kamran Arshad; Predrag Rapajic

doi:10.1109/PIMRC.2015.7343463

Resource allocation algorithms for OFDM based wireless systems

Soheil Rostami
, Kamran Arshad
, Predrag Rapajic

University of Greenwich

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Scopus citations

Abstract

Carrier Aggregation (CA) is a key functionality for next generation wireless communication systems that enables operators to create larger virtual carrier bandwidths for data hungry applications by aggregating available Component Carriers (CCs). In this paper, the Resource Allocation (RA) optimisation problem in Orthogonal Frequency Division Multiplexing (OFDM) based wireless systems is studied with CA. We show that RA with CA can be formulated as a complex mixed integer programming optimisation problem under the practical constraints of transmit power and limited number of CCs available for each user. A two-step solution is proposed, Step 1: CC allocation is performed to satisfy users CA constraints and remove the intractable integer constraints of the optimisation problem, Step 2: power and SubCarrier (SC) allocation algorithm assigns resources among users sub-optimally. We propose two efficient methods based on our two-step solution with reasonably low complexity refer as Two-Step RA Algorithm (TSRAA) and Efficient RA Algorithm (ERAA). The performance of TSRAA and ERAA are compared with the highly complex Combinatorial Algorithm (COA) introduced as an optimal solution. Simulation results verify that TSRAA reaches to optimum solution and exploits the multi-CC diversity of wireless systems. Furthermore, numerical results show that ERAA achieves satisfying performance with very low complexity.

Original language	English
Title of host publication	2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1105-1110
Number of pages	6
ISBN (Electronic)	9781467367820
DOIs	https://doi.org/10.1109/PIMRC.2015.7343463
State	Published - 1 Dec 2015
Externally published	Yes
Event	26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015 - Hong Kong, China Duration: 30 Aug 2015 → 2 Sep 2015

Publication series

Name	IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume	2015-December

Conference

Conference	26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
Country/Territory	China
City	Hong Kong
Period	30/08/15 → 2/09/15

Keywords

Ofdm
carrier aggregation
carrier selection
resource allocation

Access to Document

10.1109/PIMRC.2015.7343463

Cite this

Rostami, S., Arshad, K., & Rapajic, P. (2015). Resource allocation algorithms for OFDM based wireless systems. In 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015 (pp. 1105-1110). Article 7343463 (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 2015-December). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2015.7343463

Rostami, Soheil ; Arshad, Kamran ; Rapajic, Predrag. / Resource allocation algorithms for OFDM based wireless systems. 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. pp. 1105-1110 (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC).

@inproceedings{674287d04c7a4794882a9014f9f3069f,

title = "Resource allocation algorithms for OFDM based wireless systems",

abstract = "Carrier Aggregation (CA) is a key functionality for next generation wireless communication systems that enables operators to create larger virtual carrier bandwidths for data hungry applications by aggregating available Component Carriers (CCs). In this paper, the Resource Allocation (RA) optimisation problem in Orthogonal Frequency Division Multiplexing (OFDM) based wireless systems is studied with CA. We show that RA with CA can be formulated as a complex mixed integer programming optimisation problem under the practical constraints of transmit power and limited number of CCs available for each user. A two-step solution is proposed, Step 1: CC allocation is performed to satisfy users CA constraints and remove the intractable integer constraints of the optimisation problem, Step 2: power and SubCarrier (SC) allocation algorithm assigns resources among users sub-optimally. We propose two efficient methods based on our two-step solution with reasonably low complexity refer as Two-Step RA Algorithm (TSRAA) and Efficient RA Algorithm (ERAA). The performance of TSRAA and ERAA are compared with the highly complex Combinatorial Algorithm (COA) introduced as an optimal solution. Simulation results verify that TSRAA reaches to optimum solution and exploits the multi-CC diversity of wireless systems. Furthermore, numerical results show that ERAA achieves satisfying performance with very low complexity.",

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author = "Soheil Rostami and Kamran Arshad and Predrag Rapajic",

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Rostami, S, Arshad, K & Rapajic, P 2015, Resource allocation algorithms for OFDM based wireless systems. in 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015., 7343463, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, vol. 2015-December, Institute of Electrical and Electronics Engineers Inc., pp. 1105-1110, 26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015, Hong Kong, China, 30/08/15. https://doi.org/10.1109/PIMRC.2015.7343463

Resource allocation algorithms for OFDM based wireless systems. / Rostami, Soheil; Arshad, Kamran; Rapajic, Predrag.
2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 1105-1110 7343463 (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 2015-December).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Resource allocation algorithms for OFDM based wireless systems

AU - Rostami, Soheil

AU - Arshad, Kamran

AU - Rapajic, Predrag

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Carrier Aggregation (CA) is a key functionality for next generation wireless communication systems that enables operators to create larger virtual carrier bandwidths for data hungry applications by aggregating available Component Carriers (CCs). In this paper, the Resource Allocation (RA) optimisation problem in Orthogonal Frequency Division Multiplexing (OFDM) based wireless systems is studied with CA. We show that RA with CA can be formulated as a complex mixed integer programming optimisation problem under the practical constraints of transmit power and limited number of CCs available for each user. A two-step solution is proposed, Step 1: CC allocation is performed to satisfy users CA constraints and remove the intractable integer constraints of the optimisation problem, Step 2: power and SubCarrier (SC) allocation algorithm assigns resources among users sub-optimally. We propose two efficient methods based on our two-step solution with reasonably low complexity refer as Two-Step RA Algorithm (TSRAA) and Efficient RA Algorithm (ERAA). The performance of TSRAA and ERAA are compared with the highly complex Combinatorial Algorithm (COA) introduced as an optimal solution. Simulation results verify that TSRAA reaches to optimum solution and exploits the multi-CC diversity of wireless systems. Furthermore, numerical results show that ERAA achieves satisfying performance with very low complexity.

AB - Carrier Aggregation (CA) is a key functionality for next generation wireless communication systems that enables operators to create larger virtual carrier bandwidths for data hungry applications by aggregating available Component Carriers (CCs). In this paper, the Resource Allocation (RA) optimisation problem in Orthogonal Frequency Division Multiplexing (OFDM) based wireless systems is studied with CA. We show that RA with CA can be formulated as a complex mixed integer programming optimisation problem under the practical constraints of transmit power and limited number of CCs available for each user. A two-step solution is proposed, Step 1: CC allocation is performed to satisfy users CA constraints and remove the intractable integer constraints of the optimisation problem, Step 2: power and SubCarrier (SC) allocation algorithm assigns resources among users sub-optimally. We propose two efficient methods based on our two-step solution with reasonably low complexity refer as Two-Step RA Algorithm (TSRAA) and Efficient RA Algorithm (ERAA). The performance of TSRAA and ERAA are compared with the highly complex Combinatorial Algorithm (COA) introduced as an optimal solution. Simulation results verify that TSRAA reaches to optimum solution and exploits the multi-CC diversity of wireless systems. Furthermore, numerical results show that ERAA achieves satisfying performance with very low complexity.

KW - Ofdm

KW - carrier aggregation

KW - carrier selection

KW - resource allocation

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DO - 10.1109/PIMRC.2015.7343463

M3 - Conference contribution

AN - SCOPUS:84958057236

T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

SP - 1105

EP - 1110

BT - 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015

Y2 - 30 August 2015 through 2 September 2015

ER -

Rostami S, Arshad K, Rapajic P. Resource allocation algorithms for OFDM based wireless systems. In 2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 1105-1110. 7343463. (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). doi: 10.1109/PIMRC.2015.7343463

Resource allocation algorithms for OFDM based wireless systems

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