TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Interference-limited Resource Allocation Algorithm in Cognitive Heterogeneous Networks |
| 영문제목(English Title) |
Interference-limited Resource Allocation Algorithm in Cognitive Heterogeneous Networks |
| 저자(Author) |
Ling Zhuang
Yaohu Yin
Juan Guan
Xiao Ma
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| 원문수록처(Citation) |
VOL 12 NO. 04 PP. 1471 ~ 1488 (2018. 04) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
Interference mitigation is a significant issue in the cognitive heterogeneous networks, this paper studied how to reduce the interference to macrocell users (MU) and improve system throughput. Establish the interference model with imperfect spectrum sensing by analyzing the source of interference complexity. Based on the user topology, the optimize problem was built to maximize the downlink throughput under given interference constraint and the total power constraint. We decompose the resource allocation problem into subcarrier allocation and power allocation. In the subcarrier assignment step, the allocated number of subcarriers satisfies the requirement of the femtocell users (FU).Then, we designed the power allocation algorithm based on the Lagrange multiplier method and the improved water filling method. Simulation results and performance analyses show that the proposed algorithm causes less interference to MU than the algorithm without considering imperfect spectrum sensing, and the system achieves better throughput performance.
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| 키워드(Keyword) |
Interference mitigation
cognitive heterogeneous networks
spectrum sensing
resource allocation
Lagrange multiplier method
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| 파일첨부 |
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