NTN Paging Access Offset Timing for Lower UE Power Use
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Solution Overview
Problem
Existing communication systems in non-terrestrial networks (NTNs) face challenges in efficiently managing power consumption and synchronization due to long propagation delays and Doppler effects, particularly in devices performing access offset determinations like GNSS measurements, which are resource-intensive and often unnecessary when no paging occurs.
Innovation Solution
Implementing a method where user equipment (UE) performs access offset determination, such as GNSS measurements, only after receiving a paging message, and signaling information related to GNSS measurement times to the network, allowing the network to adjust paging procedures and reduce unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs access offset determination (GNSS measurements) before every paging occasion, then the synchronization accuracy is improved, but the power consumption increases significantly
Solution Approach 1:
The UE performs access offset determination in advance before entering idle/inactive state, and reuses this information for multiple paging occasions. The network node stores the determined access offset and retrieves it when needed, avoiding repeated measurements and reducing power consumption while maintaining synchronization accuracy.
Solution Approach 2:
The network node automatically retrieves and applies the stored access offset information without requiring the UE to perform repeated measurements. The system serves itself by caching and reusing synchronization data, eliminating the need for continuous power-intensive operations.
2Reliability
If the UE performs access offset determination frequently, then the timing synchronization is improved, but the device complexity and resource usage increase
Solution Approach 1:
The access offset determination is performed in advance before the UE enters idle or inactive state. The network node stores this pre-determined offset and retrieves it during paging procedures, eliminating the need for repeated complex measurements and reducing device resource usage while maintaining timing synchronization.
Solution Approach 2:
The network node creates and stores a copy of the access offset information determined by the UE. This copied information is then retrieved and reused for multiple paging occasions, avoiding repeated complex measurements and reducing device complexity and resource consumption.
3Use of energy by moving object
If the network implements access offset determination after paging, then the power consumption is reduced, but the response time increases
Solution Approach 1:
The UE performs access offset determination in advance before entering idle/inactive state, so the information is already available when paging occurs. This eliminates the time delay that would result from performing measurements after paging, while still allowing the UE to enter low-power states and reducing overall power consumption.
Solution Approach 2:
The network node automatically retrieves the pre-stored access offset information when needed for paging procedures, eliminating the time delay associated with post-paging measurements. The system serves itself by having the information ready in advance, achieving both fast response and reduced power consumption.
Data Source
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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").