| Zhang Hailong(张海龙)②,Ji Hong,Li Xi.[J].高技术通讯(英文),2011,17(4):377~382 |
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| Resource allocation for load balancing and fairness improvement in relay-assisted OFDMA cellular① |
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| DOI： |
| 中文关键词: |
| 英文关键词: radio resource allocation, relay, fairness, load balancing, orthogonal frequency division multiple access (OFDMA) |
| 基金项目: |
| Author Name | Affiliation | | Zhang Hailong(张海龙)② | | | Ji Hong | | | Li Xi | |
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| 中文摘要: |
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| 英文摘要: |
| A resource allocation scheme with the considerations of user fairness and load balancing is proposed in orthogonal frequency division multiple access (OFDMA)-based relay networks. The optimal resource allocation scheme is formulated mathematically to maximize the minimum achievable rate among all user equipments (UEs) for fairness improvement. The optimal problem has been proved to be NP-hard and it is prohibitive to find the optimal solution for its computational complexity. Accordingly, this paper proposes a suboptimal scheme which considers not only user fairness but also load balancing among base stations (BS) and relay stations (RSs) during resource allocation procedure. The suboptimal scheme takes the traffic load of access nodes (BS and RSs) into consideration to balance the system traffic load, which would prevent them from overloading and throughput degradation. Simulation results show that the suboptimal scheme performs similarly to the optimal solution and can enhance the system fairness and load balancing performance significantly compared with the traditional schemes. |
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