TY - JOUR
T1 - Joint radio resource allocation and content caching in heterogeneous virtualized wireless networks
AU - Tun, Yan Kyaw
AU - Ndikumana, Anselme
AU - Pandey, Shashi Raj
AU - Han, Zhu
AU - Hong, Choong Seon
N1 - Funding Information:
This work was supported in part by the National Research Foundation of Korea (NRF) funded by the Korea Government (MSIT) under Grant NRF-2017R1A2A2A05000995, in part by the Ministry of Science and ICT (MSIT), South Korea, and in part by the Grand Information Technology Research Center Support Program supervised by the Institute for Information and Communications Technology Promotion (IITP) under Grant IITP-2019-2015-0-00742.
Publisher Copyright:
© 2013 IEEE.
PY - 2020
Y1 - 2020
N2 - An efficient content caching policy at the edge of the mobile cellular network can improve the quality of services of the mobile users and reduces network congestion at the backhaul. On the other hand, the wireless network virtualization emerges as a cutting-edge technique to address the limited network capacity problem due to the exponential growth of the mobile data traffic. In addition, the wireless network virtualization can bring huge benefits such as reducing the capital expenditure (CAPEX) and the operational expenditure (OPEX) as well as improving the network capacity. In this regard, one of the key requirements to recognize the benefits of the above mentioned two technologies is to have an applicable resource allocation framework, that enables the deployment of the content caching schemes in the virtualized wireless network. In this study, we investigate a novel joint radio resource allocation and content caching problem to efficiently utilize the radio resource blocks, the transmit power, and the available cache storage at the base stations (BSs). The goal of the formulated problem presented in this paper focuses on minimizing the delays experienced by the end mobile users of mobile virtual network operators (MVNOs). We show that the formulated problem is a non-convex, mixed integer non-linear problem (MINLP), which is NP-hard and simply intractable. Therefore, we deploy the block upper-bound minimization (BSUM) algorithm to solve the formulated problem. Numerical results show that our method outperforms the existing baseline resource allocation schemes, with up to 19% performance gain in terms of network delay.
AB - An efficient content caching policy at the edge of the mobile cellular network can improve the quality of services of the mobile users and reduces network congestion at the backhaul. On the other hand, the wireless network virtualization emerges as a cutting-edge technique to address the limited network capacity problem due to the exponential growth of the mobile data traffic. In addition, the wireless network virtualization can bring huge benefits such as reducing the capital expenditure (CAPEX) and the operational expenditure (OPEX) as well as improving the network capacity. In this regard, one of the key requirements to recognize the benefits of the above mentioned two technologies is to have an applicable resource allocation framework, that enables the deployment of the content caching schemes in the virtualized wireless network. In this study, we investigate a novel joint radio resource allocation and content caching problem to efficiently utilize the radio resource blocks, the transmit power, and the available cache storage at the base stations (BSs). The goal of the formulated problem presented in this paper focuses on minimizing the delays experienced by the end mobile users of mobile virtual network operators (MVNOs). We show that the formulated problem is a non-convex, mixed integer non-linear problem (MINLP), which is NP-hard and simply intractable. Therefore, we deploy the block upper-bound minimization (BSUM) algorithm to solve the formulated problem. Numerical results show that our method outperforms the existing baseline resource allocation schemes, with up to 19% performance gain in terms of network delay.
KW - block successive upper-bound minimization (BSUM)
KW - content caching
KW - resource allocation
KW - Wireless network virtualization
UR - http://www.scopus.com/inward/record.url?scp=85081117051&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2020.2974287
DO - 10.1109/ACCESS.2020.2974287
M3 - Journal article
AN - SCOPUS:85081117051
SN - 2169-3536
VL - 8
SP - 36764
EP - 36775
JO - IEEE Access
JF - IEEE Access
M1 - 9000563
ER -