Subcarrier Allocation for the Recovery of a Faulty Cell in an OFDM-Based Wireless System

Changho YIM  Unil YUN  Eunchul YOON  

IEICE TRANSACTIONS on Communications   Vol.E97-B    No.10    pp.2243-2250
Publication Date: 2014/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.2243
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
subcarrier allocation,  OFDM,  fault recovery,  self-healing,  self-organizing network (SON),  

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An efficient subcarrier allocation scheme of a supporting cell is proposed to recover the communication of faulty cell users in an OFDM-based wireless system. With the proposed subcarrier allocation scheme, the number of subcarriers allocated to faulty cell users is maximized while the average throughput of supporting cell users is maintained at a desired level. To find the maximum number of subcarriers allocated to faulty cell users, the average throughput of the subcarrier with the k-th smallest channel gain in a subcarrier group is derived by an inductive method. It is shown by simulation that the proposed subcarrier allocation scheme can provide more subcarriers to faulty cell users than the random selection subcarrier allocation scheme.