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A cache copy layout method in d2d network

A cache and copy technology, which is applied in network planning, machine-to-machine/machine-type communication services, electrical components, etc., to reduce the number of cache copies, reduce downlink traffic pressure, and improve cache space utilization

Active Publication Date: 2022-05-06
CHONGQING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

[0003] As far as D2D cache network technology is concerned, many current studies have considered the characteristics of mobility, spatial randomness, and social relations between D2D users, and used stochastic geometry theory to establish a dynamic terminal dynamic topology model, and optimize the cache network on this basis. structure and update the cache management strategy to improve the network cache success rate and system performance. However, there is still a gap in the research on the number of D2D cache copies.

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  • A cache copy layout method in d2d network
  • A cache copy layout method in d2d network
  • A cache copy layout method in d2d network

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Embodiment Construction

[0076] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0077] The technical method that the present invention solves the problems of the technologies described above is:

[0078] Such as figure 1 Shown: Consider a D2D cache network, where the locations of all users in the network obey a homogeneous Poisson point process with a density of λ, and all D2D end devices (DUEs) have the same cache function and storage space.

[0079] In this model, the communication and effective buffer transmission distance between DUEs are both R, and there will be no link conflict due to co-channel interference during transmission. Assuming that the total number of files in the entire cache network is N, and each file has the same size, setting a single DUE will not repeatedly c...

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Abstract

The present invention claims to protect a cache copy layout method in a D2D network. Aiming at the problem of D2D cache network copy layout, firstly, the popularity ranking of cached files in the community is obtained, and the zipf distribution is used to simulate the file request model; secondly, the system cache hit rate model is analyzed and designed according to the file request model; finally, the system cache hit maximization is the objective function , using the Longi multiplier method and the bisection method to solve the objective function, and obtain the layout method of the number of cache copies. The present invention can utilize the number of cached file copies in the D2D network to be deployed, so as to maximize system cache hits.

Description

technical field [0001] The invention belongs to the technical field of D2D caching, and specifically relates to a method for arranging the number of cache copies with the goal of maximizing the system cache hit rate. Background technique [0002] With the exponential growth of wireless network data traffic, D2D (Device-to-Device) communication technology has gained great attention in order to meet the communication requirements of high transmission rate and low user-side delay in the next generation network. D2D is the terminal direct transmission technology, which can enable the two devices to communicate directly without the base station, and use the D2D terminal devices scattered in the network to buffer resources, which can reduce the traffic pressure of the base station, reduce the transmission delay of the user side, and improve the system throughput and user experience. [0003] As far as D2D cache network technology is concerned, many current studies have considered...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W16/18H04W24/02
CPCH04W4/70H04W16/18H04W24/02
Inventor 文凯谭笑廖新平
Owner CHONGQING UNIV OF POSTS & TELECOMM
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