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Support d2d-cellular heterogeneous network joint user association and content caching method

A heterogeneous network, content caching technology, applied in machine-to-machine/machine-type communication services, electrical components, transmission systems, etc., can solve user transmission performance limitations, algorithms are difficult to achieve network performance optimization, less consideration is given to end-to-end End-to-end transmission delay optimization problems, etc.

Active Publication Date: 2020-09-01
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Existing papers have carried out research on the problem of user association in cellular D2D networks, such as proposing a user association model based on network throughput optimization or maximizing the total revenue of mobile network operators; Cache hit rate maximization or schemes based on cache overhead optimization, but existing research rarely considers end-to-end transmission delay optimization, resulting in limited user transmission performance; in addition, few studies jointly consider user association and content caching strategies, It is difficult for the proposed algorithm to achieve network performance optimization

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  • Support d2d-cellular heterogeneous network joint user association and content caching method
  • Support d2d-cellular heterogeneous network joint user association and content caching method

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[0039] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] The present invention proposes a method that supports D2D-cellular heterogeneous network joint user association and content caching. According to user service quality requirements, channel conditions, and content availability, the requesting user can choose three association modes, namely D2D mode, SBS association mode and MBS association. Mode, wherein, SBS and some users (referred to as service users) have a certain caching capability and the service users have cached some content. Assuming that each requesting user has only one content demand in a given period, the serving user can serve at most one requesting user, and the users served by the base station do not exceed the allocated bandwidth capacity constraints. In order to avoid interference, it is considered to allocate the downlink bandwidth to SBS, MBS, and D2D users in pro...

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Abstract

The invention relates to a method for supporting D2D-cellular heterogeneous network joint user association and content caching, and belongs to the technical field of wireless communication. The steps of the method are: S1 modeling user content demand identification; S2 modeling user associated variables; S3 modeling user content cache variables; S4 modeling user data transmission rate; S5 modeling user total transmission delay; S6 modeling user D2D Mode transmission delay; S7 models user small cell base station association mode transmission delay; S8 models user macro cell base station association mode transmission delay; S9 models joint user association and content caching constraints; S10 based on user total transmission delay Minimize the user association mode and content caching optimization strategy. The invention can effectively guarantee the optimal user association network strategy and optimal content placement under the premise of the minimum data rate requirement of each user, and realize the minimization of the total transmission delay of user content.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for supporting D2D-cellular heterogeneous network joint user association and content caching. Background technique [0002] In recent years, with the rapid development of technologies such as mobile Internet and smart terminals, wireless services have grown explosively. Traditional cellular network technology has been difficult to effectively cope with the rapidly growing demand for mobile services. Therefore, it is urgent to study new technologies to meet user needs. Quality of service requirements, improve network performance. Device-to-Device technology can well support local services with a large amount of data in the future network by realizing direct communication between user terminals without base station forwarding. The introduction of D2D communication technology in the cellular network can effectively reduce terminal power consumption and network...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/70H04W24/02H04L29/08
CPCH04W24/02H04L67/568
Inventor 柴蓉李莹莹陈泓陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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