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A d2d collaborative caching method based on incentive mechanism

An incentive mechanism and collaborative technology, applied in machine-to-machine/machine-type communication services, connection management, network traffic/resource management, etc., can solve user caching and transmission without incentives and no data requirements, and lack of caching users Incentives, effective joint design of user preference caching strategies, not considering user caching space constraints, etc.

Active Publication Date: 2021-04-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, literature [7] and [8] did not consider constraints such as user cache space, and did not consider encouraging users without data requirements to participate in caching and transmission, which has certain limitations.
[0010] To sum up, the existing solutions have different degrees of design defects, lack of effective joint design of cache user incentives, user preferences, and cache strategies, and cannot effectively improve the performance of D2D wireless cache systems

Method used

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  • A d2d collaborative caching method based on incentive mechanism
  • A d2d collaborative caching method based on incentive mechanism
  • A d2d collaborative caching method based on incentive mechanism

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Experimental program
Comparison scheme
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Embodiment 1

[0045] The schematic diagram of the D2D wireless caching system is as follows: figure 2 shown. There are N user equipment (User Equipment, UE) capable of D2D communication in the cell, called content requester terminals (Content Requester, CR), whose set is S CR ={CR n |n=1,2,...,N}. Some of the CRs have caching capabilities and are candidate caching helpers (Caching Helper, CH). Let the set of candidate cache helpers be S CH ={CH m |m=1,2,...,M}, CH m Owned cache space is S m . When m=n, CH m =CR n , that is, the same user is both CH and CR. If the Euclidean distance d between two users n,m is less than the target transmission distance R, the two users can communicate in D2D mode. with A=[a n,m ] N×N Indicates the user topological relationship, a n,m =1 indicates that user n and user m are within the D2D communication range, otherwise a n,m =0. CH m The neighbor CR set is defined as N CR,m ={CR n |a n,m = 1}, CR n The set of neighbor CHs is defined as N...

Embodiment 2

[0128] The user equipments in the system are subject to random distribution, and some user equipments are randomly selected as candidate caching servers with caching capabilities. User preferences are generated based on file popularity following the Zipf distribution. Some parameter settings are shown in Table 3. For the sake of fairness and rationality, the NO terminal flow pricing benchmark α should not be the same as the unloading flow unit price βλ mThe value difference is too large. In this embodiment, the value of α is set to 2, the value of β is 0.5 (that is, the scaling factor k=1 / 4), and the excitation factor λ m The value range is [1,4]. Monte Carlo simulation is used, 1000 random simulations are performed, and the final result is obtained by taking the average value of all the results.

[0129] Table 3: Simulation parameter settings

[0130]

[0131] (1) Comparison benchmark:

[0132] Most Popular Caching Policy (Most Popular Caching, MPC): All cache servic...

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Abstract

The present invention relates to a D2D cooperative caching method based on an incentive mechanism, which jointly considers the relationship between the incentive cost and the cache placement strategy, constructs a system utility function from the perspective of a Network Operator (NO), and seeks to make the network The joint optimal solution for the selection of cache server and cache placement to maximize operational utility.

Description

technical field [0001] Oriented to the field of mobile communication, the present invention proposes an incentive mechanism suitable for D2D wireless caching networks, and under the incentive mechanism, designs a cooperative caching method that considers user preference and user distribution. Background technique [0002] Device-to-Device (D2D) refers to a technology that enables adjacent terminal devices to communicate directly without the forwarding and transmission of the base station. It can effectively increase the capacity of the cellular network, reduce the load of the base station, and reduce the Communication delay is one of the key technologies of 5G mobile communication. figure 1 It is a schematic diagram of a D2D communication scenario. [0003] According to Cisco data forecast, mobile data traffic will grow at a rate of 47% per year. By 2021, the monthly traffic will reach 49 EB, and the number of mobile terminals is predicted to reach 11.6 billion [1]. This is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W28/14H04W76/14
Inventor 江明陈榕吴宽佘峰霞施震威
Owner SUN YAT SEN UNIV