Coexistence method of LTE unlicensed band network laa and wifi

An unlicensed frequency band and network technology, applied in the field of network transmission and wireless communication, it can solve the problem that LAA and WiFi coexist network capacity cannot meet the communication needs, etc., and achieve the effect of improving the probability of successful WiFi transmission, efficient spectrum resources, and efficient utilization.

Active Publication Date: 2020-11-03
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

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  • Coexistence method of LTE unlicensed band network laa and wifi
  • Coexistence method of LTE unlicensed band network laa and wifi
  • Coexistence method of LTE unlicensed band network laa and wifi

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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

LTE unlicensed band network LAA and WiFi coexistence method and coexistence system. The present invention provides a power-based LAA and WiFi coexistence method and coexistence system, which is used to overcome the problem that the network capacity of LAA and WiFi coexistence cannot meet the communication requirements. The LAA and WiFi coexistence method first judges the channel state, and when there is no idle channel, the LAA sends SR signaling to the central controller, and the central controller collects, summarizes, and processes channel information between the LAA and the WiFi AC , Redistribution and transfer of control rights to achieve load balancing, when the channel is balanced, the LAA BS is "on" for data transmission in a power multiplexing manner. The present invention aims at the LAA "on" time period, transmits information of different users on the same channel at the same time through different power, and allocates different power to different users, thereby realizing the coexistence of heterogeneous networks and improving the network with less complexity performance, improve LAA system throughput and transmission efficiency, and improve spectrum utilization.

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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Patent Type & Authority Patents(China)
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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