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LTE unlicensed frequency band network LAA and WiFi coexistence method and system

An unlicensed frequency band and network technology, applied in the field of network transmission and wireless communication, can solve the problem that the coexistence of LAA and WiFi network capacity cannot meet the communication needs, and achieve the effect of improving the probability of successful WiFi transmission, reducing the number, and reducing the probability of collision

Active Publication Date: 2019-07-05
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0007] In order to improve the coexistence quality of heterogeneous networks and overcome the problem that the existing network capacity of LAA and WiFi coexistence cannot meet the growing communication needs, the present invention provides a power-based LTE unlicensed band network LAA and WiFi coexistence method and coexistence The system transmits information of different users on the same channel at the same time with different powers for the LAA "on" time period, and allocates different powers to different users according to the judgment of channel quality, so as to realize the coexistence of heterogeneous networks and improve LAA System throughput and transmission efficiency, improve spectrum utilization

Method used

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  • LTE unlicensed frequency band network LAA and WiFi coexistence method and system
  • LTE unlicensed frequency band network LAA and WiFi coexistence method and system

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no. 1 example

[0077] This embodiment provides a power-based LAA and WiFi coexistence method. The LAA and WiFi coexistence method in this embodiment is implemented based on the LAA and WiFi coexistence system in the second embodiment. figure 2 Shown is a schematic flow chart of the LAA and WiFi coexistence method described in this embodiment, wherein the system components implemented by the method are: a central controller, which is implemented by a CPU, and corresponding processing software is run on the CPU at the same time to realize its corresponding Central control function; LAA base station (Base Station, BS); WiFi wireless controller (Access Point Controller, AC); WiFi wireless access point (Access Point, AP) is the end user.

[0078] Such as figure 2 As shown, the coexistence method of LAA and WiFi includes the following steps:

[0079] In step S1, the LAA BS performs channel scanning to determine whether the channel is free. If there is a free channel, the LAA directly occupies ...

no. 2 example

[0125] This embodiment provides a power-based LAA and WiFi coexistence system, Figure 7 Shown is a schematic structural diagram of the LAA and WiFi coexistence system. Such as Figure 7As shown, the system includes: at least one central controller, at least two LAA cell base stations (LAA BS), at least one WiFi wireless controller (Access Point Controller, AC), several WiFi wireless access points (Access Point, AP ). in,

[0126] The central controller is connected to the LAA BS and the WiFi AC at the same time, and communicates with the LAA BS and the WiFi AC. Since LAA uses a MAC layer protocol with a central scheduling mechanism, it does not need collision monitoring and has a continuous transmission mechanism. However, WiFi adopts the Distributed Coordination Function (DCF) protocol based on CSMA / CA. This competitive protocol has an opportunistic transmission mechanism and needs to detect whether the channel is idle before transmission. Therefore, when the two system...

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Abstract

The invention provides an LTE unlicensed band network LAA and WiFi coexistence method and coexistence system, and provides a power-based LAA and WiFi coexistence method and coexistence system, which are used for overcoming the problem that the LAA and WiFi coexistence network capacity cannot meet the communication requirement. The LAA and WiFi coexistence method includes that Firstly, the channelstate is judged; when no idle channel exists, the LAA sends SR signaling to the central controller, the central controller collects, gathers and processes channel information between the LAA and theWiFi AC, controls the weight to be redistributed and transferred to achieve load balancing, and the LAA BS is'started 'in the channel balancing process to conduct data transmission in a power multiplexing mode. According to the invention, information of different users is transmitted through different powers on the same channel at the same time aiming at an LAA'opening 'time period, and the different powers are distributed to the different users, so that coexistence of a heterogeneous network is realized, the network performance is improved with relatively low complexity, the LAA system throughput and transmission efficiency are improved, and the spectrum utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of network transmission and wireless communication, and in particular relates to a power-based LTE unlicensed frequency band network LAA and WiFi coexistence method and coexistence system. Background technique [0002] The Long Term Evolution (LTE) system is currently the most widely used network for cellular mobile communication in the world, and has attracted the attention of mainstream communication operators and equipment manufacturers. In the future, 5G mobile communication will provide more abundant services. With the rapid growth of mobile communication data volume and the number of terminals, spectrum resources in licensed frequency bands are becoming more and more insufficient. Therefore, people in the industry propose to extend the LTE system to the 5GHz unlicensed frequency band by means of Carrier Aggregation (CA) technology to obtain more More spectrum to have a better user experience, that is, Licensed-A...

Claims

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Application Information

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IPC IPC(8): H04B17/382H04W16/14H04W72/04
CPCH04B17/382H04W72/0453H04W16/14H04W72/52
Inventor 李妍徐少毅
Owner BEIJING JIAOTONG UNIV
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