NTN Paging Access Offset Timing for Low-Power Synchronization
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Solution Overview
Problem
Existing communication systems in non-terrestrial networks face challenges in efficiently managing power consumption and synchronization due to long propagation delays and Doppler effects, particularly in devices performing frequent access offset determinations without considering the need for such measurements.
Innovation Solution
Implementing a method where user equipment (UE) performs access offset determination only after receiving a paging message, signaling GNSS measurement information to the network, and utilizing network-provided timing to optimize power consumption and synchronization processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If access offset determination is performed frequently to maintain timing and frequency synchronization in non-terrestrial networks, then synchronization accuracy is improved, but power consumption in user equipment increases
Solution Approach 1:
The patent applies preliminary action by performing access offset determination in advance based on satellite ephemeris data and orbital parameters before actual communication occurs. The UE calculates timing and frequency offsets proactively using known satellite trajectory information, allowing it to maintain synchronization without frequent active measurements. This reduces power consumption while preserving synchronization accuracy.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously determine access offsets using locally stored satellite ephemeris data and orbital parameters. The device independently calculates timing and frequency corrections without requiring continuous network assistance or frequent synchronization signals, reducing both power consumption and network overhead while maintaining synchronization accuracy.
2Use of energy by moving object
If access offset determination is performed less frequently to reduce power consumption, then power consumption is reduced, but timing and frequency synchronization accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by performing access offset determination in advance based on satellite ephemeris data and orbital parameters before actual communication occurs. The UE calculates timing and frequency offsets proactively using known satellite trajectory information, allowing it to maintain synchronization without frequent active measurements. This reduces power consumption while preserving synchronization accuracy.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously determine access offsets using locally stored satellite ephemeris data and orbital parameters. The device independently calculates timing and frequency corrections without requiring continuous network assistance or frequent synchronization signals, reducing both power consumption and network overhead while maintaining synchronization accuracy.
3Device complexity
If traditional terrestrial network access methods are used in non-terrestrial networks, then device complexity is minimized, but communication reliability deteriorates due to long propagation delay and Doppler effects
Solution Approach 1:
The patent applies preliminary action by pre-calculating access offsets using satellite ephemeris data and orbital parameters before communication occurs. This proactive approach compensates for long propagation delays and Doppler effects inherent in non-terrestrial networks, improving communication reliability without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting timing and frequency parameters based on satellite orbital information. The UE modifies its transmission parameters according to calculated offsets derived from ephemeris data, enabling reliable communication in NTN environments while maintaining relatively simple device architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces power consumption by limiting unnecessary GNSS measurements and ensures timely synchronization by aligning UE operations with network requirements, thereby enhancing efficiency in non-terrestrial networks.
Implementation Method 1
the long propagation delay and Doppler effects pose challenges for timing and frequency synchronization
Implementation Method 2
the long propagation delay and Doppler effects pose challenges for timing and frequency synchronization
Data Source
AI summary
A communication device can be configured to operate in a non-terrestrial network that includes a network node communicatively coupled to the communication device via a satellite. The communication device can determine when to perform an access offset determination (“AOD”) relative to a paging occasion (“PO”).