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LAT-based LTE-U and WiFi coexistence method used in multi-operator scene

An LTE-U, multi-operator technology, applied in the field of LAT-based LTE-U and WiFi coexistence, can solve problems such as transmission energy limitation, intermittent data transmission, collision, etc., to ensure transmission performance and access fairness , to avoid the effect of interference

Active Publication Date: 2018-05-29
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0004] (2) When multiple LTE-U base stations are deployed in the same area, the interference on the unlicensed frequency band is unpredictable, which will seriously affect the performance of LTE-U users
Data transmission in the 5GHz unlicensed frequency band should meet three requirements: i) Transmission energy limitation
The LBT mechanism based on the half-duplex mode has two main defects: i) a part of the spectrum time slot is sacrificed to detect the channel state, resulting in intermittent data transmission; It is very likely that there will be collisions between providers when accessing unlicensed frequency bands at the same time, and it is impossible to deal with potential conflicts between users
In addition, some regions currently have no clear requirements on whether LTE-U must use LBT to access unlicensed frequency bands
This complicates resource allocation between operators and coexistence issues between LTE-U and WiFi

Method used

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  • LAT-based LTE-U and WiFi coexistence method used in multi-operator scene
  • LAT-based LTE-U and WiFi coexistence method used in multi-operator scene
  • LAT-based LTE-U and WiFi coexistence method used in multi-operator scene

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Embodiment Construction

[0066] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0067] Such as figure 1 As shown, the LAT-based multi-operator LTE-U and WiFi coexistence method provided by the present invention comprise the following steps:

[0068] Step 100, the LTE-U user uses the LAT detection mechanism to determine whether other LTE-U users access the channel, and the channel detection and determination is based on the channel energy detection technology.

[0069] Step 101, according to the judgment result of the LAT channel detection mechanism, if there are no other LTE-U users on the channel, the LTE-U users without a fallback window will randomly select a window number from a series of competition window numbers to fall back, and LTE-U with an existing fallback window continues the original fallback window for fallback, while maintaining LAT channel monitoring on unlicensed channels, and the LTE-U user whose fa...

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Abstract

The invention relates to an LAT-based LTE-U and WiFi coexistence method used in a multi-operator scene, and belongs to the technical field of wireless communication. By means of the method, on the premise of ensuring the transmission performance of a WiFi network, the allocation of network resources is optimized, and the network throughput of LTE-U is increased. A power adjustment scheme based onimperfect sensing of LAT is proposed for protecting the WiFi performance and maximizing the network throughput of the LTE-U at the same time. In the method, the LTE-U senses a WiFi user through the LAT and reasonably adjusts the WiFi transmission power after WiFi transmission is detected. Thus, on the premise of not affecting the WiFi transmission performance, the throughput of the LTE-U is maximized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for coexistence of LTE-U and WiFi based on LAT in a multi-operator scenario. Background technique [0002] In recent years, with the increasing shortage of frequency band resources and the unprecedented growth of wireless data, wireless operators urgently need more frequency bands to provide higher system capacity and better service quality, and unlicensed frequency bands have gradually entered people's vision. In 2015, 3GPP proposed in LTE Release 13 the standardized technology of LTE in the unlicensed frequency band (LTE-unlicensed, LTE-U). This technology deploys LTE systems in the unlicensed frequency band to provide licensed assisted access (licensed assisted access , LAA). The popularization of carrier aggregation (carrier aggregation, CA) technology makes it possible for LTE to simultaneously access licensed and unlicensed frequency bands. LTE-U ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04B17/309H04W24/08
CPCH04B17/309H04W16/14H04W24/08
Inventor 黄晓舸李扬扬刘莹莹陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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