Wireless Content Caching in Sliced Cellular Networks with Multicast Beamforming

Wang, Kan; Ji, Wenchao; Li, Junhuai; Cao, Ting

doi:10.1109/wcsp.2019.8928095

Cited by 2 publications

(1 citation statement)

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“…Motivated by our previous works in [33,34], we resort to the LP counterpart of P 1−I . If the equivalence of optimal solutions between P 1−I and its LP counterpart can be established, then we claim that the optimal solution to LP counterpart is also integer-valued and optimal to P 1−I as well.…”

Section: Joint Clustering and Cachingmentioning

confidence: 99%

Joint V2V-Assisted Clustering, Caching, and Multicast Beamforming in Vehicular Edge Networks

Wang

et al. 2020

Wireless Communications and Mobile Computing

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As an emerging type of Internet of Things (IoT), Internet of Vehicles (IoV) denotes the vehicle network capable of supporting diverse types of intelligent services and has attracted great attention in the 5G era. In this study, we consider the multimedia content caching with multicast beamforming in IoV-based vehicular edge networks. First, we formulate a joint vehicle-to-vehicle- (V2V-) assisted clustering, caching, and multicasting optimization problem, to minimize the weighted sum of flow cost and power cost, subject to the quality-of-service (QoS) constraints for each multicast group. Then, with the two-timescale setup, the intractable and stochastic original problem is decoupled at separate timescales. More precisely, at the large timescale, we leverage the sample average approximation (SAA) technique to solve the joint V2V-assisted clustering and caching problem and then demonstrate the equivalence of optimal solutions between the original problem and its relaxed linear programming (LP) counterpart; and at the small timescale, we leverage the successive convex approximation (SCA) method to solve the nonconvex multicast beamforming problem, whereby a series of convex subproblems can be acquired, with the convergence also assured. Finally, simulations are conducted with different system parameters to show the effectiveness of the proposed algorithm, revealing that the network performance can benefit from not only the power saving from wireless multicast beamforming in vehicular networks but also the content caching among vehicles.

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Section: Joint Clustering and Cachingmentioning

confidence: 99%