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- Publisher Website: 10.1109/WCNCW49093.2021.9419999
- WOS: WOS:000706454500025
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Conference Paper: Network Cost Minimization for Reconfigurable Intelligent Surface aided Edge Caching
Title | Network Cost Minimization for Reconfigurable Intelligent Surface aided Edge Caching |
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Authors | |
Keywords | Manifolds Base stations Power demand Array signal processing Reconfigurable intelligence surfaces |
Issue Date | 2021 |
Publisher | IEEE. |
Citation | IEEE Wireless Communications and Networking Conference Workshops (WCNCW) (Hybrid On-line Conference), Nanjing, China, 29 March-1 April, 2021 How to Cite? |
Abstract | In this paper, a new RIS-aided edge caching system is proposed, where a network cost minimization problem is formulated to optimize content placement at cache units, active beamforming at base station and passive phase shifting at RIS. After decoupling the content placement with the hybrid beamforming, we propose an alternating optimization algorithm to tackle the active beamforming and passive phase shifting. For active beamforming, we transform the problem into a semidefinite programming (SDP). For passive phase shifting, we propose a block coordinate descent method and a conjugate gradient algorithm to deal with the non-convex unit-modulus constraints. Numerical results show that our RIS-aided edge caching design can effectively decrease the network cost in terms of backhaul capacity and power consumption. |
Description | Conference Theme: Shaping the Wireless Future |
Persistent Identifier | http://hdl.handle.net/10722/321078 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chen, Y | - |
dc.contributor.author | Wen, M | - |
dc.contributor.author | Basar, E | - |
dc.contributor.author | Wu, YC | - |
dc.contributor.author | Wang, L | - |
dc.contributor.author | Liu, W | - |
dc.date.accessioned | 2022-11-01T04:46:32Z | - |
dc.date.available | 2022-11-01T04:46:32Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | IEEE Wireless Communications and Networking Conference Workshops (WCNCW) (Hybrid On-line Conference), Nanjing, China, 29 March-1 April, 2021 | - |
dc.identifier.uri | http://hdl.handle.net/10722/321078 | - |
dc.description | Conference Theme: Shaping the Wireless Future | - |
dc.description.abstract | In this paper, a new RIS-aided edge caching system is proposed, where a network cost minimization problem is formulated to optimize content placement at cache units, active beamforming at base station and passive phase shifting at RIS. After decoupling the content placement with the hybrid beamforming, we propose an alternating optimization algorithm to tackle the active beamforming and passive phase shifting. For active beamforming, we transform the problem into a semidefinite programming (SDP). For passive phase shifting, we propose a block coordinate descent method and a conjugate gradient algorithm to deal with the non-convex unit-modulus constraints. Numerical results show that our RIS-aided edge caching design can effectively decrease the network cost in terms of backhaul capacity and power consumption. | - |
dc.language | eng | - |
dc.publisher | IEEE. | - |
dc.relation.ispartof | 2021 IEEE Wireless Communications and Networking Conference Workshops (WCNCW) | - |
dc.rights | . Copyright © IEEE. | - |
dc.rights | ©20xx 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. | - |
dc.subject | Manifolds | - |
dc.subject | Base stations | - |
dc.subject | Power demand | - |
dc.subject | Array signal processing | - |
dc.subject | Reconfigurable intelligence surfaces | - |
dc.title | Network Cost Minimization for Reconfigurable Intelligent Surface aided Edge Caching | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Wu, YC: ycwu@eee.hku.hk | - |
dc.identifier.authority | Wu, YC=rp00195 | - |
dc.identifier.doi | 10.1109/WCNCW49093.2021.9419999 | - |
dc.identifier.hkuros | 341154 | - |
dc.identifier.isi | WOS:000706454500025 | - |
dc.publisher.place | United States | - |