Interface Selection for Idle State in Wireless Terminals
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Solution Overview
Problem
In LTE technology, selecting the appropriate interface for a terminal device to enter or remain in an idle state during RRC connection release is challenging due to multiple interfaces involved in communication.
Innovation Solution
A method where a terminal device receives indication information from a network device to determine the appropriate interface type and threshold values for entering or remaining in an idle state, specifically using Uu or PC5 interfaces based on Reference Signal Receiving Power (RSRP) or Reference Signal Receiving Quality (RSRQ) threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device uses multiple interfaces for communication, then the communication versatility is improved, but the difficulty of selecting the appropriate interface for idle state increases
Solution Approach 1:
The patent applies parameter changes by using RSRP and RSRQ threshold parameters to determine interface selection. The network device configures threshold parameters (rsrpThresholdForPc5Interface, rsrqThresholdForPc5Interface) that the terminal device compares against measured signal qualities to automatically select between Uu and PC5 interfaces, transforming a complex selection problem into a parameter-based decision process
Solution Approach 2:
The terminal device performs self-service by autonomously determining which interface to use for idle state based on configured thresholds and current signal measurements. The device independently evaluates its own communication conditions and makes interface selection decisions without requiring continuous network intervention, reducing overall system complexity
2Ease of operation
If the terminal device automatically selects interface based on signal quality, then the ease of operation is improved, but the measurement precision requirements increase
Solution Approach 1:
The patent implements feedback mechanisms where the terminal device continuously measures signal quality (RSRP/RSRQ) and compares it against configured thresholds. The network device can adjust threshold parameters based on feedback about terminal behavior and communication conditions, creating a closed-loop system that improves measurement effectiveness while maintaining operational simplicity
Solution Approach 2:
The network device performs preliminary action by pre-configuring threshold parameters before the terminal device needs to make interface selection decisions. This advance configuration reduces the real-time computational burden on the terminal and provides clear decision criteria, though it requires accurate prediction of optimal threshold values
Data Source
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AI summary
Embodiments of the present invention provide a method for transmitting data, a terminal device and a network device. The method includes: generating, by a network device, indication information, wherein the indication information is used for indicating at least one of the following: a first interface, a type of the first interface, a criterion for determining the type of the first interface, and a criterion for determining the first interface under at least one interface type; and sending, by the network device, the indication information to the terminal device, so that the terminal device enters or remains in an idle state under the first interface according to the indication information. The method for transmitting data in embodiments of the present invention can select an appropriate interface to enter or remain in an idle state.