A terminal autonomous network selection system and method for wireless heterogeneous network

Abstract

The invention belongs to the technical field of wireless communication and discloses a terminal autonomous network selection system and a method of wireless heterogeneous network. The terminal detectsand obtains service node information by using ANDSF to form a service node list of the terminal. The terminal obtains the RMI of each node in the service node list by using pilot signal measurement and carrier sensing. The terminal triggers the feature learner, inputs the measured RMI of each node to the feature learner, and outputs the measured RMI as an evaluation value of the link quality of each node. The terminal uses 802.11 u standard and ANDSF to obtain the load information of each node in the service node list. The terminal triggers the policy learner, inputs the obtained link qualityevaluation value and load information of each node to the policy learner, and outputs the obtained link quality evaluation value and load information to the policy learner to select an access node for the terminal. The terminal records the selected node and updates and records the network selection benefit. The invention overcomes the shortcomings of additional signaling overhead and delay causedby adopting server assistance or network assistance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a terminal autonomous network selection system and method for a wireless heterogeneous network. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the continuous development of communication technology, the heterogeneous characteristics of wireless networks are becoming more and more obvious, and the characteristics of heterogeneous coexistence and integration of fifth-generation mobile communication networks are becoming more and more obvious. The goal of the wireless heterogeneous network is to make the heterogeneous RATs give full play to their respective advantages and complement each other, so that users can use the existing heterogeneous network to perform high-quality wireless communication anytime and anywhere, and achieve the best user experience. However, different RAT technol...

AI Technical Summary

Problems solved by technology

The shortcomings of this method are: firstly, this method is not suitable for providing highly real-time communication services, because the realization idea of ​​this method is that the server assists the network selection of the terminal, and the analysis and decision-making are all carried out on the server side. Therefore, from There will be an obvious delay in the process from the terminal to the server, and then back to the terminal from the server

The disadvantage of this method is: the phenomenon of poor node effect in this method will cause poor user experience

Furthermore, since the analysis and decision-making are all carried out on the server side, there will be obvious delays in the process from the terminal to the server, and then back to the terminal from the server, which makes this method not suitable for communication services that require delay

[0005] (2) The phenomenon of good nodes and poor effects in prior art 2 will result in poor user experience

This method does not consider the characteristics of the impact of concurrent terminal access on performance in 5G ultra-dense cellular scenarios. The load information obtained by the terminal is the load of the node before the terminal accesses. After a terminal selects a node based on the node load and signal strength , if there are multiple other terminals accessing the node at the same time as the terminal, it will cause the terminal to judge that the node can provide a good service before accessing, and the terminal’s traffic will be caused by the instant congestion of the node after accessing. poor user experience

Images