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Cellular network flow unloading method

A technology of traffic offloading and cellular network, which is applied in the field of wireless communication, can solve the problems of large user interference, difficulty in ensuring communication quality, difficulty in integrating three networks, etc., and achieve the effect of reducing interference between users

Pending Publication Date: 2022-04-15
CHONGQING UNIV OF POSTS & TELECOMM
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in a single-antenna network, it is very difficult to establish a proper coexistence mechanism to integrate the three networks
The interference between users is large, and it is difficult to guarantee the communication quality

Method used

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  • Cellular network flow unloading method
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  • Cellular network flow unloading method

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Embodiment Construction

[0040]The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Aiming at the performance problem of an offloading system that simultaneously offloads cellular mobile traffic to D2D and WiFi networks, the present invention proposes a cellular network traffic offloading method. This paper builds a heterogeneous wireless network under the framework of MIMO-OFDM. In the LTE-U wireless network, cellular BS and WiFi AP share the license-free frequency band, and D2D users communicate by multiplexing the frequency resources of cellular users. Based on the constructed heterogeneous network scenario, the closed expression of SINR is obtained through user receiving signals, and the approximate relationship is further proposed and the integral function f(·) is defined, and the closed expression of user rate is finally obtained. After selecting the unloading direction through Q-learning, Monte Carlo simulat...

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Abstract

The invention relates to a cellular network flow unloading method, and belongs to the field of wireless communication. Based on a single cellular network with an N-antenna BS and an M-antenna AP, cellular users are unloaded to D2D and WiFi network scenes, and the method comprises the following steps: S1, setting a heterogeneous network coexistence scene; s2, deducing a user downlink SINR closed expression in the unloading system; s3, defining an integral function f (.), and approximately solving a user arrival rate; s4, determining a cellular user unloading direction through Q learning; and S5, evaluating the performance of the heterogeneous network through Monte Carlo simulation. According to the method, the performance of a cellular network flow unloading system is deeply studied, the user arrival rate is deduced by using an integral function and an approximation relation, the user unloading direction is selected and converged through Q learning to obtain a scheme of maximizing the system sum rate, and the cellular network flow unloading method is obtained.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a method for unloading traffic of a cellular network. Background technique [0002] In recent years, the demand for cellular mobile traffic has increased dramatically, and it is difficult for existing technologies to provide high-speed, large-capacity multimedia services. The LTE-U (LTE-Unlicensed) technology, which allows LTE users to access unlicensed frequency band communication by using the existing carrier aggregation technology to aggregate licensed and unlicensed carriers, has become a development trend. In addition, in the 5G system, D2D (Device-to-device) communication is considered to be a key technology for mobile traffic offloading. In the D2D communication system, D2D users establish direct connections between adjacent users by multiplexing the same time-frequency resources of cellular users. The communication process does not require existing infrastructure such...

Claims

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Application Information

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IPC IPC(8): H04W24/06H04W28/10H04B17/391H04B7/0452
CPCY02D30/70
Inventor 裴二荣宋珈锐黄一格陶凯徐成义刘浔翀
Owner CHONGQING UNIV OF POSTS & TELECOMM