Dual-layer distributed caching method of fog wireless access network
A distributed caching and wireless access network technology, applied in electrical components, transmission systems, etc., can solve problems such as not meeting 5G requirements, low latency and high latency, and achieve low complexity, reduced download latency, and high robustness 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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