Performance analysis of LTE-U coexistence network with WiFi using queueing model

doi:10.1016/S1005-8885(17)60227-9

JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM ›› 2017, Vol. 24 ›› Issue (5): 1-7.doi: 10.1016/S1005-8885(17)60227-9

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Performance analysis of LTE-U coexistence network with WiFi using queueing model

Hu Zhiqun, Lu Zhaoming, Lin Shangjuan, Wen Xiangming, Xu Hen

School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2017-04-11 Revised:2017-09-29 Online:2017-10-30 Published:2017-12-18
Contact: Hu Zhiqun, E-mail: huzhiqun@bupt.edu.cn E-mail:huzhiqun@bupt.edu.cn
About author:Hu Zhiqun, E-mail: huzhiqun@bupt.edu.cn
Supported by:
This work was supported by Beijing Municipal Commission of Education (201501001), Beijing Municipal Science and Technology Commission (Z16111000500000), and the National Natural Science Foundation of China (61671073). And this work is also supported by Beijing Laboratory of Advanced Information Network.

Abstract

Abstract: The unforeseen mobile data explosion as well as the scarce of spectrum resource pose a major challenge to the performance of today’s cellular networks which are in urgent need of novel solutions to handle such voluminous mobile data. Long term evolution-unlicensed (LTE-U), which extends the LTE standard operating on the unlicensed band, has been proposed to improve system throughput. In LTE-U system, arriving users will contend the unlicensed spectrum resource with wireless fidelity (WiFi) users to transmit data information. Nevertheless, there is no clear consensus as to the benefits of transmission using unlicensed bands for LTE users. To this end, in this paper an analytical model is presented based on a queue system to understand the performance achieved by unlicensed based LTE system taking quality of services (QoS) and LTE-U users’ behaviors into account. To obtain the stead-state solutions of the queue system, a matrix geometric method is used to solve it. Then, the average delay and utilization of unlicensed band for the LTE-U users is derived by using the queuing model. The performance of LTE-U coexistence is evaluated with WiFi using the proposed model and provide some initial insights as to the advantage of LTE-U in practice.

Key words: LTE-U, WiFi, queueing model, matrix geometric method

CLC Number:

TN92

Hu Zhiqun, Lu Zhaoming, Lin Shangjuan, Wen Xiangming, Xu Hen. Performance analysis of LTE-U coexistence network with WiFi using queueing model[J]. JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM, 2017, 24(5): 1-7.

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Performance analysis of LTE-U coexistence network with WiFi using queueing model

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