GNSS Position Acquisition During Connected Mode With C-DRX Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining prolonged connections for global navigation satellite system (GNSS) position acquisition during connected mode, leading to repeated reconnections and increased power consumption and resource utilization.
Innovation Solution
Implementing techniques for GNSS position acquisition during connected mode connections, allowing for prolonged connections and coordination between user equipment (UE) and non-terrestrial network units, utilizing methods like connected mode discontinuous reception (C-DRX) to reduce power consumption and optimize network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If GNSS position acquisition is performed during connected mode, then network resource usage and power consumption are reduced, but connection stability may be affected due to signal interference between GNSS and wireless communication
Solution Approach 1:
The patent segments the receiver's operation into distinct modes: GNSS signal processing mode and wireless communication mode. The receiver switches between these modes based on scheduled time slots, allowing GNSS position acquisition during connected mode without continuous simultaneous operation that would cause interference. This temporal segmentation resolves the contradiction by enabling both functions while preventing signal interference through sequential execution.
Solution Approach 2:
The patent implements periodic action through scheduled GNSS measurement opportunities and discontinuous reception (DRX) cycles. The receiver periodically switches to GNSS mode at predetermined intervals to acquire position information, then returns to wireless communication mode. This periodic switching enables continuous position updates while maintaining connection stability, as the receiver is not constantly processing both signal types simultaneously.
2Loss of time
If GNSS position acquisition is performed during connected mode, then reconnection overhead is reduced, but device complexity increases due to mode switching and coordination requirements
Solution Approach 1:
The network configures the receiver with predetermined GNSS measurement opportunities and DRX parameters before connected mode operation begins. These preliminary configurations include timing information, frequency settings, and resource allocation that eliminate the need for complex real-time negotiations during mode switching. The receiver simply follows the pre-established schedule, reducing device complexity while enabling continuous connected mode operation with periodic GNSS updates.
3Measurement precision
If the receiver continuously monitors both GNSS and wireless communication signals, then position accuracy and communication responsiveness are improved, but power consumption increases significantly
Solution Approach 1:
The patent employs periodic action by scheduling GNSS signal processing at specific intervals during connected mode rather than continuously. The receiver activates GNSS signal processing only during predetermined measurement opportunities within the DRX cycle, achieving adequate position accuracy through periodic updates while dramatically reducing power consumption compared to continuous monitoring. This periodic operation allows the receiver to remain in connected mode without exhaustive signal processing.
Data Source
AI summary
Wireless communication devices, systems, and methods related to global navigation satellite system (GNSS) position acquisition during connected mode, including associated protocols and signaling, are provided. For example, a method of wireless communication performed by a user equipment (UE) can include transmitting, to a non-terrestrial network unit, a capability indication, the capability indication indicating the UE is capable of performing a global navigation satellite system (GNSS) position acquisition during a connected mode connection; receiving, from the non-terrestrial network unit, an indication of whether the non-terrestrial network unit will support the UE performing the GNSS position acquisition during the connected mode connection; and performing, based at least in part on the receiving the indication, the GNSS position acquisition during the connected mode connection with the non-terrestrial network unit.