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Distributed energy-saving method based on unlicensed spectrum D2D system

A licensed frequency band, license-free technology, applied in power management, wireless communication, electrical components, etc., can solve problems affecting LTE user data transmission, interference in license-free frequency bands, etc.

Inactive Publication Date: 2019-03-29
ZHEJIANG UNIV CITY COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the D2D system not only interferes with the license-free frequency band, but each licensed sub-channel on the LTE system will also be interfered by other D2D links, which will seriously affect the data transmission of LTE users on the licensed frequency band

Method used

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  • Distributed energy-saving method based on unlicensed spectrum D2D system
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  • Distributed energy-saving method based on unlicensed spectrum D2D system

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Embodiment Construction

[0062] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0063] Such as figure 1 The flow chart of the distributed energy saving method based on the unlicensed frequency band D2D system of the present invention is shown.

[0064] The distributed energy saving method based on the unlicensed frequency band D2D system includes the following steps:

[0065] S1) System model with minimum total power as the objective function

[0066] Such as figure 2 As shown, in the D2D communication system, users who are allowed to use D2D technology for data transmission can reuse the uplink of the macro base station and share the unlicensed frequency band with Wi-Fi APs, LAA technology and LTE-U units. Such as figure 2 As shown, MBS is a macro base station, MUE is a macro base station user, Wi-Fi AP is a Wi-Fi site, Wi-Fi user is a Wi-Fi user, LTE-U SBS is a small base station in an LTE-U system, and SUE is Users who ...

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Abstract

The invention discloses a distributed energy-saving method based on an unlicensed frequency band D2D system. The method comprises the following steps: S1) establishing a system model with a minimum total power as a target function, restricting a throughput demand of each pair of D2D users, restricting the power of the k-th D2D user on the k-th unlicensed frequency band channel, restricting the proportion of distributing the frequency spectrum of the k-th unlicensed frequency band to the k-th D2D user time-division factor, and restricting the total interference on each licensed frequency band sub-channel n by all D2D users; S2) establishing differential equations to perform the solving, and solving the differential equations constructed by the target function based on a gradient projectionalgorithm; and S3) performing simulation analysis by adopting a simlink module in the matlab. The method disclosed by the invention has the advantages that each D2D user reuses the licensed frequencyband of an LTE system and the unlicensed frequency band on a Wi-Fi system station (APs), and a distributed algorithm is proposed to accomplish the power and spectrum resource allocation of the D2D users.

Description

Technical field [0001] The present invention relates to the technical field of wireless communication systems, in particular to a distributed energy saving method based on an unlicensed frequency band D2D system. Background technique [0002] With the popularity of mobile devices and the diversification of mobile terminal applications, the rapid development of artificial intelligence, Internet of Things, and big data technologies, people’s demand for mobile data traffic in daily life has exploded. According to Cisco's Visual Network Index, global IP traffic may triple, with the annual average value rising from 1.2ZB in 2016 to 3.3.ZB in 2021. It is expected that similar trends will continue in the next few years. [0003] In order to meet the ever-increasing demand for mobile data traffic, the industry and academia are constantly exploring ways for communication systems to increase their throughput. The spectrum utilization rate is continuously improved on the existing authorized...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W52/26H04W52/38
CPCH04W52/244H04W52/267H04W52/383
Inventor 殷锐张云烽赵光哲
Owner ZHEJIANG UNIV CITY COLLEGE
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