NTN Connection Establishment Using Remaining Satellite Service Time
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Solution Overview
Problem
Existing wireless communication systems for Non-Terrestrial Networks (NTN) face inefficiencies in connection establishment due to frequent satellite handovers, leading to increased power consumption and unsuccessful connection attempts, particularly in scenarios where the service link is temporary and coverage is challenging.
Innovation Solution
A method is provided to determine the remaining time until a satellite or spotbeam handover occurs, allowing for efficient initiation of mobile originated or terminated connections only when the service link is stable enough to support the connection establishment, thereby reducing unnecessary attempts and improving power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection establishment attempts are made in NTN cells with temporary service links, then connection establishment may be initiated, but power consumption increases and connection success rate decreases due to frequent handovers
Solution Approach 1:
The network node performs preliminary evaluation of the service link stability by determining the remaining time until satellite or spotbeam handover before allowing connection establishment. This preliminary action prevents unnecessary connection attempts that would fail due to upcoming handovers, thereby reducing power consumption and improving connection success rate.
Solution Approach 2:
The system implements feedback mechanisms where the network node monitors service link conditions and provides information about remaining service time to the device. This feedback enables the device to make informed decisions about when to initiate connection attempts, avoiding periods when handover is imminent and thus reducing wasted power consumption.
2Productivity
If connection establishment is allowed during temporary service links, then connection attempts can be made, but unnecessary wasteful attempts increase due to frequent satellite handovers
Solution Approach 1:
The network node determines the remaining time until handover in advance and uses this information to gate connection establishment attempts. By performing this preliminary timing evaluation, the system prevents wasteful connection attempts that would occur during temporary service links, thereby improving connection establishment efficiency and reducing energy loss.
Solution Approach 2:
The system dynamically changes the parameter of connection establishment permission based on the remaining service time parameter. When the remaining time until handover falls below a threshold, the network node prohibits connection establishment attempts. This parameter-based control mechanism optimizes productivity by ensuring connections are only established when the service link is stable enough to support them.
3Use of energy by moving object
If the network prohibits connection establishment in cells with imminent handover, then power efficiency improves, but connection establishment latency increases for stable cells
Solution Approach 1:
The network node dynamically adjusts the threshold parameter for remaining service time based on the type of connection establishment (mobile originated or mobile terminated). This parameter adjustment allows the system to optimize the balance between power efficiency and time loss by being more permissive for certain connection types while maintaining strict control for others, thereby reducing unnecessary delays in stable cells.
Data Source
AI summary
A method (1200) performed by a wireless device (110) includes obtaining a remaining service time (Tservice) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.