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Unlicensed-frequency-band LTE system and Wi-Fi coexistence method

A license-free, frequency band technology, applied in the coexistence field of LTE system and Wi-Fi, can solve the problems of inefficient mechanism and great influence of Wi-Fi, and achieve the effect of increasing network capacity, improving operation efficiency, and improving transmission performance

Inactive Publication Date: 2015-10-21
CHONGQING UNIV
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Problems solved by technology

However, in heterogeneous wireless protocols / standards employing asynchronous time slots, different scheduling modes (Time Division Multiple Access and Carrier Sense Multiple Access), different transmission / interference ranges, and incompatible communication mechanisms, these inherent mechanisms will change. very inefficient
Related studies have shown that LTE system performance is less affected in a coexistence environment, but Wi-Fi is greatly affected by LTE transmission

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] The present invention provides a coexistence method of an LTE system and Wi-Fi using an unlicensed frequency band, so that LTE and Wi-Fi can share unlicensed spectrum resources in the unlicensed frequency band and realize harmonious coexistence. Scenarios where the LTE system and Wi-Fi coexist using unlicensed frequency bands are as follows: figure 1 As shown, the scene includes an LTE macro base station, an LTE small base station in the license-free frequency band, and a Wi-Fi access point. There is a mobile user (UE) within the coverage of the above two at the same time. The base station and Wi-Fi belong to the license-free frequency band, and the signals between them have interference.

[0026] In order to solve the above problems, the present invention proposes a co-existence method between the LTE system and Wi-Fi using the lic...

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Abstract

The invention relates to an unlicensed-frequency-band LTE system and Wi-Fi coexistence method and belongs to the technical field of wireless communication. The method comprises the following steps: 1) carrying out coexistence channel detection on an LTE small base station under an unlicensed frequency band, and if channels are busy, carrying out detection continuously, or otherwise, turning to the next step, wherein the coexistence channel detection comprises energy detection and signal detection; and 2) realizing coexistence of an unlicensed-frequency-band LTE system and Wi-Fi by utilizing an on / off mechanism, wherein the on / off mechanism defines a time period, and within the time period, the LTE small base station occupies the channel according to the defined time percentage, and the on / off mechanism comprises a static on / off mechanism and a self-adaptive on / off mechanism. The unlicensed-frequency-band LTE system and Wi-Fi coexistence method allows the LTE system and the Wi-Fi to be able to share unlicensed spectrum resources in the unlicensed frequency band, and harmonious coexistence is realized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a coexistence method of an LTE system using an unlicensed frequency band and Wi-Fi. Background technique [0002] In recent years, the use of smartphones, tablets, and other wireless devices has led to a potential increase in wireless capacity demand, however, the shortage of available spectrum resources severely limits the growth of network capacity. Mobile phone operators need more frequency bands to meet the growing demand for traffic. Although we can choose licensed spectrum to provide better user experience, unlicensed frequency bands can be considered as an effective supplement. Operators should try to achieve higher spectrum efficiency and better user experience. If LTE in the unlicensed frequency band has such potential, it is worth our research. [0003] The Wi-Fi technology widely used by people now operates on an unlicensed frequency band, and the use of...

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Application Information

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IPC IPC(8): H04W16/14H04W74/08
CPCH04W16/14H04W74/0808
Inventor 贾云健何沛桦覃剑
Owner CHONGQING UNIV
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