| The fifth generation (5G) wireless communication involves many
features such as high-energy efficiency, high spectrum efficiency,
and low latency. As well as, the Internet contents are increasing
like the content that generated by the users in social media, which
brings a big challenge to Radio Access Network (RAN). Using fogcloud
network that takes the advantages of fog computing and
cloud radio access network (C-RAN) is one of the key techniques
for the 5G Mobile Communications System. Fog-cloud network is
capable of caching the popular contents in the fog computing
based access points (F-APs) with a limitation of the storage
capacity. Furthermore, the High Power Node (HPN), the devices
in the C-RAN, guarantees that all of the users will be served by its
broad coverage area. In the recent years, the user’s demand for
the latency has been increasing. Therefore, our focus is to find a
way to reduce the latency of local users who retrieve the contents
from the fog-cloud networks. Our work proposes the latencyaware
caching assignment scheme, which is helpful to calculate
and organize the contents needed by the users. Based on the
quality of the user channels, as known as the transmission rate,
this scheme finds out the contents that fully meet user
requirements and stores these contents in the most suitable F-AP.
The results show that the best way to decrease the latency is by
reducing the accessing to the cloud service. This scheme has been
significantly reduced the number of requesting and accessing to
the cloud service, and overall network delay also has been
effectively reduced. |
