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Method for Encouraging Terminals to Participate in Caching Data in Terminal Direct System
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A technology for terminal direct communication and caching data, which is applied in the field of mobile communication, and can solve problems such as ignoring user social factors, increasing computational complexity, and high similarity of data packets
Active Publication Date: 2021-04-13
SUN YAT SEN UNIV
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Problems solved by technology
The model has the following problems: First, the author ignores the social factors between users, and the data packets obtained by users with high social similarity have high similarity, so that the data packets stored by UE can not only bring benefits to itself but also It can serve surrounding requesting UEs; secondly, the author focuses on how to deterministically cache data packets in a content provider (Content Provider, CP), while ignoring the fact that there are multiple different CPs in the actual network
For example, You et al. completed the transaction process between CP and NO based on the ACA auction mechanism [4]. Due to the large number of rounds in the ACA auction, the computational complexity increases
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Embodiment 1
[0050] The present invention considers the system model in a single cellscenario, such as figure 1 shown. There is a Network Operator (NO) in the system, C (C≥2, C∈N + ) content providers (Content Provider, CP), the set is expressed as C={c 1 ,...,c i ,...,c C}. There are C content management functions (Content Management Function, CMF) in the NO network, and each CMF is responsible for managing all helper users (Helper User Equipment, HUE) for a dedicated CP offloading data, and each CP can only have one CMF. There is H in the system (H≥2, H∈N + ) HUEs willing to store the data packets provided by the CP, the set is expressed as H={h 1 ,..., h m ,..., h H}, and V(V≥H, V∈N + ) requesting users (Victim User Equipment, VUE) that need to obtain data packets from the surrounding HUE, the set is expressed as V={v 1 ,...,v n ,...,v V}. Among them, each CP has multiple data packets that need to be buffered by the HUE. In order to simplify the analysis, this model assum...
Embodiment 2
[0140] In order to more fully illustrate the beneficial effects of the present invention, the effectiveness and advanced nature of the present invention will be further described below in combination with specific embodiments and related simulation results and analysis of problems P1 and P2. It is assumed that the geographic locations of HUE and VUE in the system obey the uniform distribution, and the user's preference for CP and data packets within the CP obey the Zipf distribution. Unless otherwise specified below, the values of the main system simulation parameters in this embodiment are shown in Table 2.
[0143] when x m,i When ∈{0,1}, that is, under model A, the system simulation results are as follows Figure 4 to Figure 7 shown. It is set that each HUE can access up to 5 VUEs, that is, ε m = 5, the CMF corresponding to each CP can access at most e i = 15 HUEs. The schemes compared in the simulation are d...
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Abstract
The present invention relates to the technical field of mobile communications, and more particularly, to a method for a network operator (NO) in a terminal direct system to motivate terminals to participate in caching and share data. The method provided by the present invention is provided with an incentive mechanism for participating in caching and sharing data. Terminals sharing data are given incentives to enhance their motivation to participate in the process of data caching and sharing. At the same time, the method provided by the present invention considers the preference information of the cache assist terminal (HUE) and the data request terminal (VUE) to the content provider (CP), considers the diversity of the popularity of the CP, and explores the joint physical and social The matching problem of the terminal under the relationship.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a method for encouraging terminals to participate in caching data in a terminal direct communicationsystem. Background technique [0002] In recent years, the communication method based on Device-to-Device (D2D) technology has become one of the key communication technologies under the 5G communication network due to its significant advantages in improving user service experience and improving network spectrum utilization. . With the continuous expansion of the storage space of smart terminals and the continuous enhancement of computing and processing capabilities, and the wireless caching technology based on terminal equipment (User Equipment, UE) has unique advantages in reducing backhaul delay and network congestion, making UE-based The wireless caching technology has become one of the solutions for how to reduce network congestion and improve us...
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