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Performance analysis of load balancing in OFDMA cellular networks with inter‐cell relay
Author(s) -
Lu Weifeng,
Chen Siguang,
Yang Lijun
Publication year - 2017
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3456
Subject(s) - computer science , subcarrier , orthogonal frequency division multiple access , telecommunications link , relay , spectral efficiency , cellular network , interference (communication) , throughput , computer network , orthogonal frequency division multiplexing , enhanced data rates for gsm evolution , load balancing (electrical power) , telecommunications , wireless , channel (broadcasting) , power (physics) , physics , geometry , mathematics , quantum mechanics , grid
Summary To balance and improve the resource utilization of the orthogonal frequency division multiple access (OFDMA) cellular networks, we switch parts of the edge users in overloaded cell to the adjacent light‐loaded cells by using the inter‐cell relay. The efficiency of traditional load balancing method based on the cell switching is low and in some cases, will occur the collision load problem. In this paper, we propose a new load balancing scheme based on inter‐cell relay in downlink OFDMA cellular networks. Besides, we put forward a new spectrum division scheme to reduce interference and improve spectrum efficiency. According to the formulas derived from the model we established, we can obtain the signal interference ratio and further to calculate the amount of remaining subcarrier and the throughput of the system. Finally, through numerical calculation and simulation, the result shows that the load balancing and spectrum division schemes can remit the resource stress of the overloaded cell and improve the spectrum utilization in adjacent cells.