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Journal Article
Energy-Efficient Joint Design of Fronthaul and Edge Links for Cache-Aided C-RAN Systems with Wireless Fronthaul
- Authors
- Junbeom Kim, Daesung Yu, Seung-Eun Hong, Seok-Hwan Park
- Issue Date
- 2019-09
- Citation
- Entropy, v.21, no.9, pp.1-23
- ISSN
- 1099-4300
- Publisher
- MDPI
- Language
- English
- Type
- Journal Article
- Abstract
- This work addresses the joint design of fronthaul and edge links for a cache-aided cloud radio access network (C-RAN) system with a wireless fronthaul link. Motivated by the fact that existing techniques, such as C-RAN and edge caching, come at the cost of increased energy consumption, an energy efficiency (EE) metric is defined and adopted as the performance metric for optimization. As the fronthaul links can be used to transfer quantized and precoded baseband signals or hard information of uncached files, both soft- and hard-transfer fronthauling strategies are considered. Extensive numerical results validate the impact of edge caching, as well as the advantages of the energy-efficient design over the spectrally-efficient scheme. Additionally, the two fronthauling strategies-the soft- and hard-transfer schemes-are compared in terms of EE.
- KSP Keywords
- Cloud radio, Cloud-RAN(C-RAN), Edge Caching, Energy efficiency, Energy-efficient design, Joint design, Numerical results, Radio Access Network(RAN), baseband signal, energy consumption, fronthaul link
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
