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Joint user access selection and resource allocation method in cache heterogeneous network

A heterogeneous network and access selection technology, applied in network traffic/resource management, access restrictions, electrical components, etc., can solve problems such as waste of resources

Active Publication Date: 2017-06-30
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0010] Aiming at the waste of resources caused by user requests for repeated content in traditional heterogeneous networks, as well as the problems of simplification of traditional communication access modes and resource allocation, the present invention proposes a method for joint user access selection and resource allocation in caching heterogeneous networks

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  • Joint user access selection and resource allocation method in cache heterogeneous network
  • Joint user access selection and resource allocation method in cache heterogeneous network
  • Joint user access selection and resource allocation method in cache heterogeneous network

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Embodiment Construction

[0088] The specific implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0089] Combining the characteristics of future communication development, the present invention first proposes a research scenario, a D2D communication heterogeneous network with caching hardware devices, in which the small cell base stations and D2D users in the heterogeneous network have different caching functions, and the cached content can be passed through the local The way of communication reduces repeated requests for resources; on the basis of content allocation optimization, it greatly improves the performance of user access selection and resource allocation after access; by optimizing user access selection, the local service of cached content can be maximized , and achieve system optimization through a reasonable resource allocation scheme.

[0090] In the D2D heterogeneous network with caching, combined with system re...

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Abstract

The invention discloses a joint user access selection and resource allocation method in a cache heterogeneous network, and relates to the field of mobile communication. The method is specifically as follows: firstly, establishing a system model based on a D2D (device-to-device) of one single cell; acquiring each limitation condition and utility function Ui corresponding to the system model in a communication connection process aiming at one request user I; and then establishing a complete user access selection and resource allocation model according to each limitation condition and the utility function Ui of the system model, solving and analyzing to loosing the 0-1 variable in the model, and converting into a convex optimization problem; and finally, solving and proofing the convex optimization problem to obtain the maximum utility income of the system and a user access selection scheme under maximized resource allocation, and then performing simulation verification. The utility function is imported to jointly model, the non-convex optimization problem is converted into the convex optimization method, the system throughput is maximally improved, the micro-cellular is shunted, and the spectrum utilization efficiency is improved.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a joint user access selection and resource allocation method in a cache heterogeneous network. Background technique [0002] At present, with the rapid development of mobile communications and the explosive growth of wireless data, people's demand for wireless mobile services has increased dramatically, which has brought huge challenges to the computing, storage, and transmission capabilities of the network. In order to cope with the above-mentioned challenges in wireless communication, various communication technologies are being continuously proposed. [0003] In order to meet the ever-increasing user demands and improve system capacity, heterogeneous cellular networks have been extensively studied; at the same time, the evolution of LTE-Advanced has made near-field communication technology gradually stand out and become a hot topic. Introduce D2D (Device-to-Device) technol...

Claims

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Application Information

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IPC IPC(8): H04W28/16H04W48/16
CPCH04W28/16H04W48/16
Inventor 李曦谭志远张鹤立纪红
Owner BEIJING UNIV OF POSTS & TELECOMM
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