Terminal MAC Reset for Non-Terrestrial Link Interruptions
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Solution Overview
Problem
In non-terrestrial networks, during feeder link hard switch, the radio link between a terminal device and the network device is interrupted, leading to unnecessary power consumption due to invalid behaviors like measurements and uplink transmissions by the terminal device, as it is unaware of the link interruption.
Innovation Solution
The network device sends indication information to the terminal device to indicate an interrupted state, prompting the terminal device to reset its MAC entity and/or stop specific processes, thereby avoiding unnecessary operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device continues to perform measurement and uplink transmission during radio link interruption, then the terminal device maintains normal communication protocols, but power consumption increases due to invalid operations
Solution Approach 1:
The network device performs preliminary action by sending indication information to the terminal device before the radio link interruption occurs or at the beginning of interruption. This indication information informs the terminal device about the upcoming or current link interruption state, allowing the terminal device to proactively suspend measurement and uplink transmission operations, thereby avoiding power consumption during invalid communication periods while maintaining protocol compliance through structured indication and response mechanisms
2Use of energy by moving object
If the terminal device suspends measurement and uplink transmission during link interruption, then power consumption is reduced, but the terminal device needs additional indication information from the network device
Solution Approach 1:
The network device extracts and transmits specific indication information about the radio link interruption state to the terminal device. This extracted information is sufficient for the terminal device to determine when to suspend operations, allowing the terminal device to reduce power consumption without requiring continuous or extensive information exchange. The indication information is taken out from the normal communication flow and delivered efficiently to trigger appropriate terminal device responses
3Loss of energy
If the network device sends indication information to the terminal device, then the terminal device can avoid invalid operations, but the network device increases transmission overhead
Solution Approach 1:
The network device applies partial action by sending indication information only during specific radio link interruption events rather than continuously or for all communication states. This selective indication approach provides just enough information for the terminal device to avoid invalid operations during actual interruptions, while minimizing the overall signaling overhead. The indication is applied partially - only when and where needed - rather than as a continuous or excessive measure
Data Source
AI summary
Embodiments of the present application provide a method for controlling a terminal device, a terminal device and a network device which are applied to the field of communication technology. An embodiment of the present application includes: receiving first indication information sent by a network device, where the first indication information is used to indicate that a radio link between a terminal device and the network device is in an interrupted state; resetting a MAC entity and/or stopping N processes in the terminal device according to the first indication information, where N is an integer greater than or equal to 1.