Radio Terminal WWAN WLAN Network Switching Controller
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radio terminal and base station technologies face challenges in efficiently switching between WWAN and WLAN networks for data communication, particularly in selecting the optimal network for high-speed and large-capacity communication, due to limitations in network selection and data switching mechanisms.
Innovation Solution
The implementation of a radio terminal and WWAN-supporting base station with a controller that performs network selection and switching between WWAN and WLAN based on predetermined information, using a terminal-based and base station-based scheme, where the base station transmits switching commands and measurement configurations to the radio terminal, enabling efficient data switching and network adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the radio terminal autonomously selects network based on terminal-based scheme, then the switching speed is improved, but the network selection accuracy deteriorates
Solution Approach 1:
The base station acts as an intermediary that provides measurement configurations and switching commands to the terminal. The terminal uses these base station-directed instructions to autonomously select networks, combining fast terminal-based switching with base station-based selection accuracy.
2Measurement precision
If the base station performs network selection and transmits switching commands, then the network selection accuracy is improved, but the device complexity increases
Solution Approach 1:
The network selection function is segmented between base station and terminal. The base station performs measurement configurations and provides switching commands, while the terminal executes autonomous network selection, dividing the complex task into manageable parts.
Solution Approach 2:
The terminal is empowered to autonomously select networks based on base station configurations and its own measurements, making the terminal self-sufficient in network selection while reducing base station complexity.
3Speed
If the radio terminal switches between WWAN and WLAN frequently, then the communication speed is improved, but the loss of time due to switching overhead increases
Solution Approach 1:
The base station performs measurement configurations and provides switching commands in advance, allowing the terminal to prepare for network switching before it is needed, reducing the actual switching overhead time.
4Measurement precision
If the base station performs measurement configurations and transmits switching commands, then the network adaptation accuracy is improved, but the use of energy by the base station increases
Solution Approach 1:
The terminal autonomously performs measurements and network selection based on base station configurations, making the terminal self-sufficient and reducing the energy burden on the base station while maintaining accurate network adaptation.
Data Source
AI summary
A radio terminal according to an embodiment includes a controller having a function of switching data between a wireless wide area network (WWAN) and a wireless local area network (WLAN) based on information configured from the WWAN; and a transmitter configured to transmit, to the WWAN, a WLAN measurement report in response to satisfaction of a predetermined condition, the WLAN measurement report including: a WLAN measurement results; and a WLAN related identifier indicating a WLAN to which the radio terminal has been connected. The predetermined condition includes a condition that the WLAN measurement is configured from the WWAN to the radio terminal.