Double-layer distributed caching method for fog wireless access network
A distributed cache and wireless access network technology, applied in the transmission system, electrical components, etc., can solve the problems of low latency, high latency, and failure to meet 5G requirements, and achieve reduced download latency, low complexity, and high robustness sexual effect
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[0044] Such as figure 1 As shown, a double-layer distributed caching method for a fog wireless access network in this implementation includes the following steps:
[0045] (1) Divide the fog network into F-AP layer and UE layer. D2D communication can be carried out between UEs covered by the same F-AP. Each UE preferentially applies for a file from a neighboring UE. If the neighboring UE does not cache the file, it applies to the F-AP.
[0046] (2) Then, each UE determines the popularity of a certain file according to local information, and the process is as follows:
[0047]
[0048] where P nk for file f n at UEu k popularity around, t nk For neighboring devices to u k request file f n times.
[0049] At the same time, each F-AP records the number of times UEs within its coverage area apply for files, and similarly obtains the popularity of files in the F-AP layer.
[0050] (3) According to the popularity of the file obtained in (2), the UE layer cache distribution...
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