WLAN Interworking Indication for Cellular Base Station Resource Control
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Solution Overview
Problem
Existing methods for wireless LAN control information distribution in cellular communication systems often result in inappropriate user terminals receiving information, leading to inefficient radio resource consumption, as they do not account for each user terminal's specific parameters.
Innovation Solution
A processor and user terminal system where the user terminal transmits notifications based on specific parameters such as WLAN communication unit status, connected access points, beacon signal detection, geographical location, moving speed, and battery level to determine the appropriateness of receiving wireless LAN control information, allowing the cellular base station to decide on information provision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless LAN control information is provided to all user terminals without considering their parameters, then the coverage and availability of wireless LAN access is improved, but radio resource consumption increases and inappropriate terminals receive unnecessary information
Solution Approach 1:
The patent applies local quality by customizing the provision of wireless LAN control information according to each user terminal's specific parameters and capabilities. The base station evaluates individual terminal characteristics (such as terminal type, current state, and supported functions) and selectively provides information only to terminals that can appropriately utilize it, thereby avoiding wasteful radio resource consumption while maintaining broad coverage availability.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the provision of wireless LAN control information based on varying terminal parameters and system conditions. The base station monitors terminal states and modifies information distribution decisions according to changing parameters, ensuring that information is provided only when beneficial and resources are used efficiently.
2Measurement precision
If detailed parameters of each user terminal are notified to the cellular RAN, then the accuracy of network selection is improved, but the amount of radio resources consumed increases
Solution Approach 1:
The patent applies the taking out principle by extracting only the essential parameters needed for accurate network selection from the complete set of terminal parameters. Instead of notifying the cellular RAN of all terminal details, the system identifies and transmits only the critical parameters (such as terminal type, current operational state, and wireless LAN capability indicators) that are necessary for making informed network selection decisions, thereby reducing radio resource consumption while maintaining selection accuracy.
Solution Approach 2:
The patent implements partial action by providing a subset of terminal parameters rather than complete parameter sets. The base station determines which parameters are sufficient for accurate network selection and notifies only those, avoiding the excessive transmission of unnecessary parameter data while still achieving the required measurement precision for effective network selection.
Data Source
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AI summary
A cellular communication system comprises: a UE configured to perform a WLAN-related process for switching an access network for accommodating a traffic of the UE to an E-UTRAN from a WLAN, on the basis of WLAN control information; and an eNB configured to manage a cell in which the UE exists. The UE transmits, to the eNB, a WLAN Interworking Indication indicating whether or not it is possible to perform the WLAN-related process, on the basis of at least one parameter related to the UE. The eNB having received the WLAN Interworking Indication determines whether or not to provide the UE with the WLAN control information, on the basis of the WLAN Interworking Indication.