Joint Caching and Computing of Software-Defined Space-Air-Ground Integrated Networks for Video Streaming Service Improvement

Zhou, Tianyi; Liang, Chengchao; Chen, Qianbin

doi:10.1109/vtc2022-fall57202.2022.10012719

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…In problem (8), when providing layer l k to the k-th user, we designed the optimal beamforming vectors from the helpers and MBS, denoted as w k,l k and w B k,l k , by maximizing the sum rate of users. Constraints (8b) and (8c) guarantee the minimum QoS requirements, where µ k,l k and µ B k,l k are the pre-defined QoS thresholds for helpers and the MBS if user k requests layer l k .…”

Section: Problem Formulationmentioning

confidence: 99%

“…In [ 7 ], the authors proposed a novel secure random caching scheme for large-scale multi-antenna heterogeneous wireless networks, and demonstrated that edge caching could improve the user satisfaction and the achievable network throughput. In [ 8 ], the authors proposed to improve the quality of experience (QoE) for users when offering multimedia videos by using software-defined intra network caching and computing in the SAGIN. In [ 9 ], the authors explored a new SAGIN architecture to support these new requirements of 6G mobile communication networks in a flexible, low-latency, and efficient manner.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Designs of SVC-Based Content Placement and Delivery in Wireless Caching Networks

Zhang

Zhong

Ren

et al. 2023

Sensors

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To allieviate the heavy traffic burden over backhaul links and improve the user’s quality of service (QoS), edge caching plays an important role in wireless networks. This paper investigated the optimal designs of content placement and transmission in wireless caching networks. The contents to be cached and requested were encoded into individual layers by scalable video coding (SVC), and different sets of layers can provide different viewing qualities to end users. The demanded contents were provided by helpers caching the requested layers, or by the macro-cell base station (MBS) otherwise. In the content placement phase, this work formulated and solved the delay minimization problem. In the content transmission phase, the sum rate optimization problem was established. To effectively solve the nonconvex problem, the methods of semi-definite relaxation (SDR), successive convex approximation (SCA), and arithmetic-geometric mean (AGM) inequality were adopted, after which the original problem was transformed into the convex form. The numerical results show that the transmission delay is reduced by caching contents at helpers. Moreover, the fast convergence of the proposed algorithm for solving the sum rate maximization problem is presented, and the sum rate gain of edge caching is also revealed, as compared to the benchmark scheme without content caching.

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Section: Problem Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Designs of SVC-Based Content Placement and Delivery in Wireless Caching Networks

Zhang

Zhong

Ren

et al. 2023

Sensors

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On the Interplay of Artificial Intelligence and Space-Air-Ground Integrated Networks: A Survey

Bakambekova,

Kouzayha,

Al-Naffouri

2024

IEEE Open J. Commun. Soc.

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Fine-grained Caching and Resource Scheduling for Adaptive Bitrate Videos in Edge Networks

Zhang

Tian

Zhang

et al. 2023

ACM Trans. Sen. Netw.

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With the easy access to mobile networks and the proliferation of video applications, video traffic is occupying a great portion of the network traffic, which poses a new challenge of how to alleviate the heavy backhaul traffic and ensure the high quality of experience for video services. As a promising solution towards addressing this challenge, video caching in edge networks has recently received significant attention, which mostly considers the video popularity and the user preference for the video. However, few studies consider the user behavior and the user preference for different parts of the video that indeed have an essential impact on caching efficiency. Hence, this paper proposes a new caching and resource scheduling scheme for adaptive bitrate videos by incorporating these fine-grained factors. We first model the video service problem as a nonlinear integer programming problem, which can be divided into a cache placement problem and an online resource scheduling problem. Then we design efficient algorithms based on several techniques, including greedy strategy, relaxation and rounding, to solve the two problems. Extensive experimental results based on two real-world datasets show that the proposed solution achieves superior performance compared with several state-of-the-art caching approaches.

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Joint Caching and Computing of Software-Defined Space-Air-Ground Integrated Networks for Video Streaming Service Improvement

Cited by 3 publications

References 16 publications

Optimal Designs of SVC-Based Content Placement and Delivery in Wireless Caching Networks

Optimal Designs of SVC-Based Content Placement and Delivery in Wireless Caching Networks

On the Interplay of Artificial Intelligence and Space-Air-Ground Integrated Networks: A Survey

Fine-grained Caching and Resource Scheduling for Adaptive Bitrate Videos in Edge Networks

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