Social-Aware Caching and Resource Sharing Maximized Video Delivery Capacity in 5G Ultra-Dense Networks
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Social-Aware Caching and Resource Sharing Maximized Video Delivery Capacity in 5G Ultra-Dense Networks Minh-Phung Bui1,2 · Nguyen-Son Vo1 · Sang Quang Nguyen1 · Quang-Nhat Tran3 © Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract In 5G networks, a massive number of connections of high data rate services, e.g., video streaming services, certainly make the networks deteriorated because of extreme traffic congestion at the backhaul links of macro base stations (MBSs). Although ultra-dense networks (UDNs) have been considered as a promising architecture to stimulate the 5G networks, the congestion problem hampers the UDNs to provide mobile users (MUs), i.e., represented by device-to-device (D2D) pairs and shared downlink resource users (SUs), with high video delivery capacity. In this paper, we propose a social-aware caching and resource sharing (SCS) strategy for video streaming services in 5G UDNs. Particularly, we formulate the SCS problem by taking into account the social relationship of each D2D pair, the available storage of femtocell base stations (FBSs) and transmitters (TXs) of D2D pairs, the target signal to interference plus noise ratio (SINR) of SUs, and the popularity of videos. The SCS problem is then solved for 1) optimal number of caching copies of each video and optimal caching placements in the FBSs and 2) optimal resource sharing allocation between the SUs and the D2D pairs for D2D communications. This way, the workload at the backhaul links of the MBSs can be reduced. Simultaneously, an arbitrary MU can retrieve the videos alternately from the MBSs, FBSs, and TXs at high cache-hit ratio and maximum delivery capacity. Simulation results are analyzed to show the benefits of the proposed SCS strategy compared to other conventional schemes. Keywords 5G caching · D2D communications · Downlink resource sharing · Social-aware networks · Ultra-dense networks
1 Introduction In the new era of the fourth industrial revolution embedded with 5G networks based Internet of things (IoT), about 50 billion devices will be connected to wireless networks for communications and advanced services by 2020 [1, 2]. In this context, ultra-dense networks (UDNs) deployed in a denser small cell architecture have been emerged as a
This paper was presented in part at the 14th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (Qshine 2018), Ho Chi Minh City, Vietnam, Dec. 2018. Nguyen-Son Vo
[email protected] 1
Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
2
Van Lang University, Ho Chi Minh City 700000, Vietnam
3
Ho Chi Minh City University of Transport, Ho Chi Minh City 700000, Vietnam
promising solution to meet the requirements of extremely high delivery capacity and low latency in 5G networks. However, the diverse characteristics of a massive number of users’ devices, e.g., social relationship and behavior, requesting high data rate services pose a set of challenges to 5G U
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