Method for supporting D2D-cellular heterogeneous network joint user association and content cache

A heterogeneous network and content caching technology, applied in machine-to-machine/machine-type communication services, electrical components, wireless communication, etc., can solve the problem that the algorithm is difficult to achieve network performance optimization, and the optimization of end-to-end transmission delay is less considered , limited user transmission performance, etc.

Active Publication Date: 2018-06-12
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 opti

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  • Method for supporting D2D-cellular heterogeneous network joint user association and content cache
  • Method for supporting D2D-cellular heterogeneous network joint user association and content cache
  • Method for supporting D2D-cellular heterogeneous network joint user association and content cache

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] 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 serves at most one requesting user, and the base station serves no more than the allocated bandwidth capacity constraint. In order to avoid interference, it is considered to allocate the downlink bandwidth to SBS, MBS, and D2D users in proportion, adopt an ...

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Abstract

The invention relates to a method for supporting D2D cellular heterogeneous network joint user association and content cache, and belongs to the technical field of wireless communication. The method comprises the following steps: S1 modeling a user content requirement identifier; S2 modeling a user association variable; S3 modeling a user content cache variable; S4 modeling a user data transmission rate; S5 modeling a user total transmission delay; S6 modeling a user D2D mode transmission delay; S7 modeling a user small cell base station association mode transmission delay; S8 modeling a usermacro cell base station association mode transmission delay; S9 modeling joint user association and content cache restriction conditions; and S10 determining a user association mode and a content cache optimization strategy based on the minimum user total transmission delay. By adoption of the method provided by the invention, the optimal user association network strategy, the optimal content placement and the minimum user content total transmission delay are achieved on the premise of effectively ensuring the minimum data rate requirement of each user.

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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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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