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A content distribution method in a cellular network

A cellular network and content technology, applied in the field of content distribution in the cellular network, can solve the problems of not giving user content caching incentive mechanism, ignoring user selfish nature, etc.

Active Publication Date: 2020-05-01
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the performance of the network, the existing technology introduces a cooperative caching scheme, by selecting some cache nodes to cache some specific content that is interested by neighboring users, but ignoring the user's selfish nature
On the other hand, there is no incentive mechanism for users to cache content

Method used

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  • A content distribution method in a cellular network
  • A content distribution method in a cellular network
  • A content distribution method in a cellular network

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Embodiment Construction

[0070] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0071] In a D2D cellular network, if a user wants to obtain a specific content, a certain cost is required, including the cost of content caching in storage space and the access cost of bandwidth required for content transmission. When making a caching decision for each user's mobile terminal, each user hopes to reduce their own cost overhead while maximizing their own benefits. Users are reluctant to cache content for other users due to their selfish nature. Therefore, the user's social relationship and similar interest can be used to cache content for other users.

[0072] Such as figure 1 As shown, the specific steps are as follows:

[0073] Step 1. Establish a simulation scene of the base station and users, each user communicates with users within its communication range, and defines the social relationship between users according to each user'...

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Abstract

The invention discloses a content distribution method in a cellular network, which belongs to the field of wireless communication. First, a simulation scenario is established, each user communicates with users within its communication range, and according to each user's interest preference for each content, the social relationship between users is defined, and the social distance and social distance between users are calculated. The user's potential demand for content; then use the potential demand and social distance to calculate the cost for each user to obtain each content, and aim at minimizing the cost of all users to determine the set of users as cache nodes. Finally, the most suitable space size is allocated for the cache content of each cache node. According to the user set of the best cache node, the base station of each cell allocates M content to N nodes. The invention effectively reduces the cost of content acquisition, improves the profit of the entire network and the cache hit rate of cache nodes, reduces the time delay of content acquisition, and reduces the overhead of base station wireless links and backhaul links.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a device-to-device (D2D) communication technology of a mobile cellular network, in particular to a method for distributing content in a cellular network. Background technique [0002] In the prior art, Internet traffic is mainly caused by content distribution and acquisition. With the explosive increase of data volume and content diversity, it is a severe challenge to effectively and safely improve the quality of experience of end users. Content caching, a popular content distribution technique, is widely used in the Internet to reduce cellular traffic load. In order to meet the demand of massive mobile data in the future cellular network, some researches have introduced content caching technology into the cellular network. [0003] In the next-generation cellular network, Device-to-Device (D2D) has attracted extensive attention as an effective technology to offload cellular...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W24/06H04L29/08
CPCH04W4/70H04W24/06H04L67/535H04L67/568
Inventor 张天魁范红梅
Owner BEIJING UNIV OF POSTS & TELECOMM
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