Edge Cache-assisted Secure Low-Latency Millimeter Wave Transmission

Hao, Wanming, Zeng, Ming, Sun, Gangcan and Xiao, Pei (2019) Edge Cache-assisted Secure Low-Latency Millimeter Wave Transmission IEEE Internet of Things Journal.

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Abstract

In this paper, we consider an edge cache-assisted millimeter wave cloud radio access network (C-RAN). Each remote radio head (RRH) in the C-RAN has a local cache, which can prefetch and store the files requested by the actuators. Multiple RRHs form a cluster to cooperatively serve the actuators, which acquire their required files either from the local caches or from the central processor via multicast fronthaul links. For such a scenario, we formulate a beamforming design problem to minimize the secure transmission delay under transmit power constraint of each RRH. Due to the diffculty of directly solving the formulated problem, we divide it into two independent ones: i) minimizing the fronthaul transmission delay by jointly optimizing the transmit and receive beamforming; ii) minimizing the maximum access transmission delay by jointly designing cooperative beamforming among RRHs. An alternatively iterative algorithm is proposed to solve the first optimization problem. For the latter, we first design the analog beamforming based on the channel state information of the actuators. Then, with the aid of successive convex approximation and S -procedure techniques, a semidefinite program (SDP) is formulated, and an iterative algorithm is proposed through SDP relaxation. Finally, simulation results are provided to verify the performance of the proposed schemes.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :	Name Email ORCID Hao, Wanming w.hao@surrey.ac.uk Zeng, Ming Sun, Gangcan Xiao, Pei P.Xiao@surrey.ac.uk
Date :	3 December 2019
DOI :	10.1109/JIOT.2019.2957351
Copyright Disclaimer :	© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords :	Edge cache; Secure transmission delay; Millimeter wave; Multicast; Beamforming
Depositing User :	Diane Maxfield
Date Deposited :	16 Dec 2019 10:41
Last Modified :	16 Dec 2019 10:41
URI:	http://epubs.surrey.ac.uk/id/eprint/853258

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