Efficient Combining Scheme of Scheduling and Channel Allocation in Multi-Channel Systems

Hoyoung CHOI  Jinwoo CHOE  Daehyoung HONG  

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.12    pp.3699-3703
Publication Date: 2007/12/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.12.3699
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multi-channels,  OFDMA,  scheduling,  channel allocation,  RRM,  

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In this letter, we propose an efficient scheme for combining scheduling and channel allocation functions in multi-channel systems such as an orthogonal frequency division multiple access (OFDMA). In our approach, the scheduling function is embedded in the channel allocation function in an implicit manner, and the implicit scheduler only translates quality-of-service (QoS) requirements into a set of constraints on channel allocation. The channel allocation problem is then formulated as a linear programming (LP) problem, and the optimal solution can be easily obtained through various LP algorithms. Through extensive numerical experiments, it is demonstrated that the proposed scheme can maximize the cell throughput under the given QoS requirements.