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Two-level Transmission Scheme for Cache-enabled Fog Radio Access Networks by He, Shiwen; Qi, Chenhao; Huang, Yongming; Hou, Qi; Nallanathan, Arumugam is a scholarly article available to read on EtoBox.

What is Two-level Transmission Scheme for Cache-enabled Fog Radio Access Networks about?

In this paper, we investigate the downlink transmission for cache-enabled fog radio access networks aiming at maximizing the delivery rate under the constraints of fronthaul capacity, maximum transmit power, and size of files. To reduce the delivery latency and the burden on fronthaul links and make full use of the local cache and baseband signal processing capabilities of enhanced remote radio heads (eRRHs), a two-level transmission scheme including cache-level and network-level transmission is proposed. In cache-level transmission, only requested files cached at the local cache are transmitted to the corresponding users. The duration of cache-level transmission is the delay caused by the transfer between the baseband unit (BBU) and eRRHs as well as the signal processing at the BBU. The remaining requested files are jointly transmitted to the corresponding users at network-level transmission. For cache-level transmission, a centralized optimization algorithm is firstly presented and then a decentralized optimization algorithm is provided to avoid the exchange of signaling among eRRHs. Meanwhile, another centralized optimization algorithm is presented to tackle the optimization pro

Author

He, Shiwen; Qi, Chenhao; Huang, Yongming; Hou, Qi; Nallanathan, Arumugam

Published

2018

Language

EN