KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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A Novel Resource Scheduling Scheme for CoMP Systems

  • Zhou, Wen'an (School of Computer Science, Beijing University of Post and Telecommunications) ;
  • Liu, Jianlong (School of Computer Science, Beijing University of Post and Telecommunications) ;
  • Zhang, Yiyu (School of Computer Science, Beijing University of Post and Telecommunications) ;
  • Yang, Chengyi (School of Computer Science, Beijing University of Post and Telecommunications) ;
  • Yang, Xuhui (School of Computer Science, Beijing University of Post and Telecommunications)
  • Received : 2016.05.09
  • Accepted : 2016.12.08
  • Published : 2017.02.28
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Abstract

Coordinated multiple points transmission and reception (CoMP) technology is used to mitigate the inter-cell interference, and increase cell average user normalized throughput and cell edge user normalized throughput. There are two kinds of radio resource schedule strategies in LTE-A/5G CoMP system, and they are called centralized scheduling strategy and distributed scheduling strategy. The regional centralized scheduling cannot solve interference of inter-region, and the distributed scheduling leads to worse efficiency in the utilize of resources. In this paper, a novel distributed scheduling scheme named 9-Cell alternate authorization (9-CAA) is proposed. In our scheme, time-domain resources are divided orthogonally by coloring theory for inter-region cooperation in 9-Cell scenario [6]. Then, we provide a formula based on 0-1 integer programming to get chromatic number in 9-CAA. Moreover, a feasible optimal chromatic number search algorithm named CNS-9CAA is proposed. In addition, this scheme is expanded to 3-Cell scenario, and name it 3-Cell alternate authorization (3-CAA). At last, simulation results indicate that 9/3-CAA scheme exceed All CU CoMP, 9/3C CU CoMP and DLC resource scheduling scheme in cell average user normalized throughput. Especially, compared with the non-CoMP scheme as a benchmark, the 9-CAA and 3-CAA have improved the edge user normalized throughput by 17.2% and 13.0% respectively.

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References

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