Efficient clustering scheme for OFDMA-based multicast wireless systems using grouping genetic algorithm
The spectral inefficiency problem faced by the conventional multicast schemes in OFDMA-based multicast systems is investigated. To improve spectral efficiency, the multicast problem is formulated as a combinatorial clustering optimisation problem where multicast groups are divided into smaller subgr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Institution of Engineering and Technology (IET)
2012
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| Subjects: | |
| Online Access: | http://shdl.mmu.edu.my/3382/ http://shdl.mmu.edu.my/3382/1/Efficient%20clustering%20scheme%20for%20OFDMA-based%20multicast%20wireless%20systems%20using%20grouping%20genetic%20algorithm.pdf |
| Summary: | The spectral inefficiency problem faced by the conventional multicast schemes in OFDMA-based multicast systems is investigated. To improve spectral efficiency, the multicast problem is formulated as a combinatorial clustering optimisation problem where multicast groups are divided into smaller subgroups and subcarriers are allocated to each subgroup. A novel multicast clustering scheme based on a grouping genetic algorithm is proposed to maximise the aggregate data rate. Simulation results show that the proposed scheme can achieve near-optimal performance while outperforming the conventional unicast and multicast schemes. |
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