Content distribution method in cellular network

Abstract

The invention discloses a content distribution method in a cellular network, and belongs to the field of the wireless communication. The content distribution method comprises the following steps: firstly establishing a simulation scene, enabling each user to perform D2D communication with the user in its communication range, defining a social relation between the user and the user according to interests and preferences on each content by each user, and computing the social distance between the users and the potential quantity demanded on the content by the user; and computing the cost of acquiring each content by each user by using the potential quantity demanded and the social distance, and determining a user set used as a cache node by taking the overhead minimization of all users as thetarget; and finally distributing the most suitable space size for the caching content at each cache node, and distributing M content for n nodes by a base station of each cellular cell according to the user set of the optimal cache node. Through the content distribution method disclosed by the invention, the cost of acquiring the content is effectively reduced, the benefit of the whole network and the caching hit rate of the cache node are improved, the content acquisition delay is lowered, and the base station wireless link and loop link overhead are reduced.

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...

AI Technical Summary

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

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