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Novel intercell interference mitigation algorithms for multicell OFDMA systems with limited base station cooperation

Novel intercell interference mitigation algorithms for multicell OFDMA systems with limited base station cooperation
Novel intercell interference mitigation algorithms for multicell OFDMA systems with limited base station cooperation
Resource allocation in multicell downlink orthogonal frequency division multiple-access (OFDMA) systems is investigated, where BSs first independently carry out subcarrier-allocation and then mitigate intercell interference (InterCI) with the aid of very limited base station (BS) cooperation. Two novel InterCI mitigation algorithms are proposed. The first one is the distributed decision making assisted cooperation (DDMC) algorithm, and the second one is the centralized decision making assisted cooperation (CDMC) algorithm. When employing the DDMC algorithm, each BS independently makes the InterCI mitigation decisions. By contrast, when employing the CDMC algorithm, the centralized InterCI mitigation decisions are made with the aid of the cell-edge users' discrete InterCI information sharing among BSs. While both the algorithms motivate to maximize the spectral-efficiency (sum rate), the CDMC algorithm also aims to maximize the frequency reuse factor. In this paper, we study and compare the performance, including spectral-efficiency of cell-edge users, frequency reuse factor, overhead, etc., of the multicell downlink OFDMA systems employing the proposed and other InterCI mitigation algorithms. Our studies show that both the DDMC and CDMC algorithms can achieve better spectral-efficiency performance than the existing on-off power (OOP) algorithm. Moreover, the CDMC algorithm is capable of achieving the performance close to the upper-bound attained by the so-called full InterCI information assisted decision making (FIIDM) algorithm, which uses exhaustive search to determine the InterCI mitigation decisions. Additionally, the CDMC algorithm is demonstrated to have the highest frequency reuse factor in addition to its spectral-efficiency advantage.
0018-9545
406-420
Shi, Jia
1bed2b92-b1bc-4500-8eeb-7525d9d3f0e6
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Ni, Qiang
26353377-f7f4-416b-8fef-14e45636b14c
Shi, Jia
1bed2b92-b1bc-4500-8eeb-7525d9d3f0e6
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Ni, Qiang
26353377-f7f4-416b-8fef-14e45636b14c

Shi, Jia, Yang, Lieliang and Ni, Qiang (2017) Novel intercell interference mitigation algorithms for multicell OFDMA systems with limited base station cooperation. IEEE Transactions on Vehicular Technology, 66 (1), 406-420. (doi:10.1109/TVT.2016.2542182).

Record type: Article

Abstract

Resource allocation in multicell downlink orthogonal frequency division multiple-access (OFDMA) systems is investigated, where BSs first independently carry out subcarrier-allocation and then mitigate intercell interference (InterCI) with the aid of very limited base station (BS) cooperation. Two novel InterCI mitigation algorithms are proposed. The first one is the distributed decision making assisted cooperation (DDMC) algorithm, and the second one is the centralized decision making assisted cooperation (CDMC) algorithm. When employing the DDMC algorithm, each BS independently makes the InterCI mitigation decisions. By contrast, when employing the CDMC algorithm, the centralized InterCI mitigation decisions are made with the aid of the cell-edge users' discrete InterCI information sharing among BSs. While both the algorithms motivate to maximize the spectral-efficiency (sum rate), the CDMC algorithm also aims to maximize the frequency reuse factor. In this paper, we study and compare the performance, including spectral-efficiency of cell-edge users, frequency reuse factor, overhead, etc., of the multicell downlink OFDMA systems employing the proposed and other InterCI mitigation algorithms. Our studies show that both the DDMC and CDMC algorithms can achieve better spectral-efficiency performance than the existing on-off power (OOP) algorithm. Moreover, the CDMC algorithm is capable of achieving the performance close to the upper-bound attained by the so-called full InterCI information assisted decision making (FIIDM) algorithm, which uses exhaustive search to determine the InterCI mitigation decisions. Additionally, the CDMC algorithm is demonstrated to have the highest frequency reuse factor in addition to its spectral-efficiency advantage.

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More information

Accepted/In Press date: 7 March 2016
e-pub ahead of print date: 17 March 2016
Published date: January 2017
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 391331
URI: http://eprints.soton.ac.uk/id/eprint/391331
ISSN: 0018-9545
PURE UUID: a8e29016-a825-44ae-bedb-2ac812516001
ORCID for Lieliang Yang: ORCID iD orcid.org/0000-0002-2032-9327

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Date deposited: 11 Apr 2016 13:58
Last modified: 07 Oct 2020 01:42

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Contributors

Author: Jia Shi
Author: Lieliang Yang ORCID iD
Author: Qiang Ni

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