Cache-enabled in cooperative cognitive radio networks for transmission performance.pdf (1.26 MB)
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Cache-enabled in cooperative cognitive radio networks for transmission performance

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journal contribution
posted on 19.11.2020, 10:19 by Jiachen Yang, Chaofan Ma, Jiabao Man, Huifang Xu, Gan ZhengGan Zheng, Houbing Song
The proliferation of mobile devices that support the acceleration of data services (especially smartphones) has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceeding the throughput of the backhaul. To improve spectrum utilization and increase mobile network traffic, in combination with content caching, we study the cooperation between primary and secondary networks via content caching. We consider that the secondary base station assists the primary user by pre-caching some popular primary contents. Thus, the secondary base station can obtain more licensed bandwidth to serve its own user. We mainly focus on the time delay from the backhaul link to the secondary base station. First, in terms of the content caching and the transmission strategies, we provide a cooperation scheme to maximize the secondary user's effective data transmission rates under the constraint of the primary users target rate. Then, we investigate the impact of the caching allocation and prove that the formulated problem is a concave problem with regard to the caching capacity allocation for any given power allocation. Furthermore, we obtain the joint caching and power allocation by an effective bisection search algorithm. Finally, our results show that the content caching cooperation scheme can achieve significant performance gain for the primary and secondary systems over the traditional two-hop relay cooperation without caching.

Funding

National Natural Science Foundation of China (No. 61871283)

Foundation of Pre-Research on Equipment of China (No. 61403120103)

Joint Foundation of Pre-Research on Equipment from Education Department of China (No. 6141A02022336)

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Tsinghua Science and Technology

Volume

25

Issue

1

Pages

1 - 11

Publisher

Tsinghua University Press

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Tsinghua University Press under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

15/11/2018

Publication date

2019-07-22

Copyright date

2020

ISSN

1007-0214

eISSN

1878-7606

Language

en

Depositor

Dr Gan Zheng. Deposit date: 16 November 2020