WLAN Interworking Configuration Storage for 5G Terminals
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in efficiently managing the transition of terminals between RRC_CONNECTED and RRC_IDLE states when using RAN-controlled LTE-WLAN interworking, leading to potential errors and inefficiencies in traffic communication due to the lack of valid configuration information across base stations.
Innovation Solution
A method and apparatus that allow a terminal to receive and utilize control information for configuring interworking with a wireless local area network (WLAN) in a cellular connection state, enabling seamless communication and maintaining traffic communication even when transitioning between RRC states, with the configuration information being specific to each base station to prevent operational errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal releases the cellular connection state to save power and reduce base station burden, then power consumption and operational burden are reduced, but the terminal loses valid configuration information for WLAN interworking and cannot maintain communication
Solution Approach 1:
The terminal stores WLAN interworking configuration information received from the base station in its memory before releasing the cellular connection state. This preliminary storage action ensures that when the terminal transitions to idle state and later reconnections, it already has the necessary configuration information ready, eliminating the need to request it again and maintaining communication continuity without requiring the base station to retain the information.
2Reliability
If the base station retains configuration information to enable seamless WLAN interworking, then communication reliability is improved, but the operational burden and resource usage of the base station increase
Solution Approach 1:
The WLAN interworking configuration information is extracted from the base station's memory and stored in the terminal's memory before the terminal releases the cellular connection state. This extraction transfers the storage burden from the base station to the terminal, allowing the base station to reduce its operational burden and resource usage while the terminal maintains the configuration information for future WLAN interworking operations.
3Measurement precision
If the terminal requests configuration information upon reconnection to ensure validity, then configuration accuracy is improved, but the time delay and signaling overhead increase
Solution Approach 1:
The terminal performs preliminary storage of WLAN interworking configuration information in its memory before releasing the cellular connection state. When the terminal reconnections, it can directly use the pre-stored configuration information without needing to request it again, thereby eliminating reconnection time delay and reducing signaling overhead while maintaining configuration validity.
Solution Approach 2:
The terminal creates a copy of the WLAN interworking configuration information received from the base station and stores it in its own memory. This copying allows the terminal to have a local replica of the configuration information that can be used immediately upon reconnection, avoiding the time delay and signaling overhead of requesting the information again while ensuring configuration accuracy.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.A communication method operated by a terminal includes receiving, from a base station, control information for configuring the terminal to interwork with a WLAN in a cellular connection state, communicating at least one traffic with a first WLAN based on the control information in the cellular connection state, and communicating the at least one traffic with the first WLAN based on the control information, if the cellular connection state is released. A terminal includes a controller configured to receive, from a base station, control information for configuring the terminal to interwork with a WLAN in a cellular connection state, communicate at least one traffic with a first WLAN based on the control information in the cellular connection state, and communicate the at least one traffic with the first WLAN based on the control information, if the cellular connection state is released.