Abstract
Femtocells have been considered as a promising technology to provide better indoor coverage and spatial reuse gains. However, the co-channel deployment of macrocells and femtocells is still facing challenges arising from potentially severe inter-cell interference. In this paper, we investigate the uplink resource allocation problem of femtocells in co-channel deployment with macrocells. We first model the uplink power and subchannel allocation in femtocells as a non-cooperative game, where inter-cell interference is taken into account in maximizing the femtocell capacity and uplink femto-to-macro interference is alleviated by charging each femto user a price proportional to the interference that it causes to the macrocell. Based on the non-cooperative game, we then devise a semi-distributed algorithm for each femtocell to first assign subchannels to femto users and then allocate power to subchannels. Simulation results show that the proposed interference-aware femtocell uplink resource allocation algorithm is able to provide improved capacities for not only femtocells but also the macrocell, as well as comparable or even better tiered fairness in the two-tier network, as compared with existing unpriced subchannel assignment algorithm and modified iterative water filling based power allocation algorithm.
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Acknowledgements
The authors would like to thank Dr. David López-Pérez and Prof. Arumugam Nallanathan for their helpful discussions. This work was supported by the Sci-tech Projects of the Committee on Science and Technology of Beijing (D08080100620802, Z101101004310002), the National Natural Science Foundation of China (61101109), and National Key Technology R&D Program of China (2010ZX03003-001-01, 2011ZX03003-002-01), Co-building Project of Beijing Municipal Education Commission “G-RAN based Experimental Platform for Future Mobile Communications”, “Research on Resource Allocation and Scheduling Strategy of Future Wireless Communication System” and “Cooperative Communications Platform for Multi-agent Multimedia Communications”, Key Fund of Beijing Key Laboratory on Future Network Research. This work was also partially supported by the UK EPSRC Grants EP/H020268/1, CASE/CNA/07/106, and EP/G042713/1.
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Zhang, H., Chu, X., Wen, X. (2013). Cross-Tier Interference Pricing Based Uplink Resource Allocation in Two-Tier Networks. In: 4G Femtocells. SpringerBriefs in Computer Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9080-7_3
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DOI: https://doi.org/10.1007/978-1-4614-9080-7_3
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