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A cache node selection method based on d2d communication

A technology for caching nodes and communication distance, which is applied in the field of communication, and can solve problems such as increasing the burden on base stations, heavy loads on wireless networks, and high costs, and achieve the effects of saving system overhead, reducing total system costs, and realizing total system costs

Active Publication Date: 2022-01-28
NANJING UNIV OF POSTS & TELECOMM
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] With the rapid development of smart devices and the continuous emergence of various multimedia applications, mobile users can enjoy a variety of service experiences through wireless networks, but at the same time it will also cause huge traffic
It is expected that the demand for cellular network bandwidth will increase exponentially in the next few years, which will undoubtedly bring a heavy load to the existing wireless network, especially the burden on the base station, and even lead to system congestion and performance degradation
Although the traffic burden can be reduced by widely erecting base stations, this solution requires a lot of cost, and the speed of traffic growth is much faster than the speed of base station deployment

Method used

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  • A cache node selection method based on d2d communication
  • A cache node selection method based on d2d communication
  • A cache node selection method based on d2d communication

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Embodiment Construction

[0030] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0031] like figure 1 and Figure 5 As shown, the present invention provides a caching node selection method based on D2D communication, including the following steps:

[0032] S1: User requests file content:

[0033] In this embodiment, N users are randomly distributed in the community, and users can request some files according to their own needs. Assuming that the size of each requested file is the same, the number of files requested by each user at a certain moment is expressed as The file requested by each user at a certain moment can be expressed as F={f 1 ,f 2 ,f i ,L,f N}, where f i Indicates that the i-th user requests files.

[0034] S2: Construct an optimization function aiming at minimizing the total system cost:

[0035] The objective function of the optimization function is:

[0036]

[0037] s.t.s i ={0,1},s i ∈S...

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Abstract

The invention discloses a caching node selection method based on D2D communication. Firstly, the user set satisfying the D2D communication distance around each user is counted, and then the judgment factor of each user is calculated, and the user with the largest judgment factor is selected as the caching node. After the user set satisfying the D2D communication distance between the node and its surroundings is removed, a second round of cache node selection is performed on the remaining users, and the iteration is terminated until all users determine the file acquisition method. The present invention combines caching technology with D2D communication technology, establishes a system cost function on the premise of ensuring that all users in the system obtain their required files, and optimizes the strategy for users to obtain files in the system cost function, thereby realizing the system overall The cost is minimized and has excellent application prospects.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for selecting a cache node based on D2D communication. Background technique [0002] With the rapid development of smart devices and the continuous emergence of various multimedia applications, mobile users can enjoy rich and diverse service experiences through wireless networks, but at the same time it will also cause huge traffic. It is expected that the demand for cellular network bandwidth will increase exponentially in the next few years, which will undoubtedly bring a heavy load to the existing wireless network, especially the burden on the base station, and even lead to system congestion and performance degradation. Although the traffic burden can be reduced by widely erecting base stations, this solution requires a lot of cost, and the speed of traffic growth is much faster than the speed of base station deployment. Therefore, under the premise...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W28/14
Inventor 朱琦陶静朱洪波杨龙祥
Owner NANJING UNIV OF POSTS & TELECOMM
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