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

Active Publication Date: 2018-06-12
SOUTHEAST UNIV
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Problems solved by technology

[0003] However, the existing communication network architecture does not meet the requirements of 5G. Moreover, with the arrival of the 5G / B5G era, the amount of files in the network will increase greatly, and the requirements for low latency will be higher

Method used

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  • Dual-layer distributed caching method of fog wireless access network
  • Dual-layer distributed caching method of fog wireless access network
  • Dual-layer distributed caching method of fog wireless access network

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Embodiment 1

[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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Abstract

The invention discloses a dual-layer distributed caching method of a fog wireless access network. The method orderly comprises the following steps: dividing a fog network into a F-AP (fog wireless access node) layer and a UE (user equipment) layer, wherein each of the F-AP and UE collects file application information from the around UE, and computes the field popularity according to the information; solving the optimal caching distribution of the UE by using a knapsack algorithm; and solving the optimal caching distribution of the F-AP layer by using a BP algorithm, wherein the UE decides theUE in D2D connection with the same by querying whether the around UE is receiving the file. By importing the D2D connection in the fog network, the dual-layer caching is realized, and the caching decision can be made by adopting the distribution method as long as each of the F-AP and the UE collects the local information; compared with the traditional caching algorithm, the download delay is obviously reduced, and the convergence can be finished within ten times of iteration, the complexity is low, and meanwhile, the higher robustness is provided.

Description

technical field [0001] The invention relates to a cache technology, in particular to a double-layer distributed cache method for a fog wireless access network. Background technique [0002] At present, in order to provide wireless users with a low-latency download experience, people's research on cache layout in wireless communication systems is mainly concentrated on existing architectures such as CRAN, and the research on single-layer centralized cache layout at the BS layer is the main research. [0003] However, the existing communication network architecture does not meet the requirements of 5G. Moreover, with the advent of the 5G / B5G era, the amount of files in the network will increase greatly, and the requirements for low latency will be higher. Therefore, finding a low-latency cache placement strategy suitable for 5G / B5G architecture is an urgent problem to be solved. Contents of the invention [0004] Purpose of the invention: The purpose of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
CPCH04L67/06H04L67/10H04L67/568
Inventor 夏骋宇蒋雁翔
Owner SOUTHEAST UNIV
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