NTN Terminal State Switching for Non-Coverage Power Saving
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Solution Overview
Problem
In non-terrestrial networks (NTN), terminal devices face challenges with network non-coverage due to discontinuous coverage, particularly in IoT scenarios, leading to issues with radio resource control and power consumption.
Innovation Solution
A method and apparatus for wireless communication that involves transmitting and receiving time information to determine configuration parameters for state switching, including a first time period until network non-coverage and a duration of non-coverage, to optimize power saving modes in terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device continuously monitors network coverage in NTN, then the network coverage detection reliability is improved, but the power consumption increases
Solution Approach 1:
The terminal device performs preliminary action by determining the first time information (first time period and second time period) in advance before network non-coverage occurs. This allows the device to pre-plan state switching and power saving configurations, avoiding continuous monitoring during non-coverage periods while maintaining detection reliability when needed.
Solution Approach 2:
The patent implements periodic action by using the determined first time information to configure periodic state switching and power saving modes. The terminal device transitions between active and inactive states based on the time periods, monitoring network coverage periodically rather than continuously, thus reducing power consumption while maintaining reliability.
2Use of energy by moving object
If the terminal device enters network non-coverage, then the power saving requirement is improved, but the radio resource control connection management becomes complex
Solution Approach 1:
The core network performs preliminary action by determining the first configuration parameter based on the first time information before the terminal device enters network non-coverage. This pre-determination simplifies RRC connection management by establishing clear state switching configurations in advance, avoiding complex real-time decisions during non-coverage periods.
Solution Approach 2:
The first configuration parameter acts as an intermediary that translates the first time information into actionable state switching instructions. This intermediary parameter simplifies the complexity by providing a structured mechanism for managing RRC connections during non-coverage, bridging the gap between time information and connection management decisions.
3Use of energy by moving object
If the terminal device releases RRC connection in IoT scenario, then the power consumption is reduced, but the network reconnection efficiency decreases
Solution Approach 1:
The patent applies preliminary action by determining the first time information and first configuration parameter in advance, allowing the terminal device to release RRC connections proactively before network non-coverage occurs. This pre-planning ensures that reconnection can be efficiently managed when coverage is restored, balancing power savings with reconnection timing.
Solution Approach 2:
The first configuration parameter provides a feedback mechanism that guides the terminal device's state switching and reconnection behavior. By using the time information to configure appropriate parameters, the system optimizes the balance between power consumption during non-coverage and reconnection efficiency when coverage is restored.
Data Source
AI summary
The present application provides a method and an apparatus for wireless communication. One example method includes: transmitting, by a terminal device, first time information, where the first time information is used to determine a first configuration parameter of the terminal device; and receiving, by the terminal device, the first configuration parameter, where the first configuration parameter is used by the terminal device to perform state transition.