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| A Novel Dual-band Femtocells Unlicensed Channel Access Mechanism |
| LIAO Shuri① HE Shiwen①② YANG Luxi② |
①(School of Information Science and Engineering, Southeast University, Nanjing 210096, China)
②(Key Laboratory of Cognitive Radio and Information, Guilin University of Electronic Technology, Guilin 541004, China) |
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Abstract In order to efficiently utilize the unlicensed band to improve the network capacity, it is necessary to solve the problem of the coexistence between Long Term Evaluation (LTE) and WiFi. Licensed-Assisted Access (LAA) and the Dual-Band Femtocell (DBF) which can access both the licensed and unlicensed bands are proposed recently. In this paper, considering the case that a DBF partly overlaps with just one WiFi Access Point (AP), a novel DBF unlicensed channel access mechanism is proposed. Then, the optimal traffic balancing scheme over licensed and unlicensed bands considering the effect of coverage overlap is developed. Numerical results show that if DBF and WiFi AP are invisible mutually, the proposed scheme outperforms the existing scheme in terms of sum utility and throughput because of extra fraction of unlicensed channel time for DBF using spatial reuse. Otherwise the performance is the same as the existing scheme, that is, DBF and WiFi AP use the unlicensed band alternately.
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Received: 01 March 2017
Published: 14 September 2017
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| Fund:The National Natural Science Foundation of China (61471120, 61422105, 61671145), The Key Laboratory of Cognitive Radio and Information Processing, Ministry of Education (Guilin University of Electronic Technology) (CRKL160203) |
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Corresponding Authors:
LIAO Shuri
E-mail: 220140692@seu.edu.cn
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