GNSS Prohibition Configuration for Reduced Capability WTRUs
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Solution Overview
Problem
Global Navigation Satellite System (GNSS) receivers in wireless transmit/receive units (WTRUs), especially in IoT and reduced capability devices, face challenges with power-intensive and time-consuming GNSS acquisition and reporting processes, particularly in non-terrestrial networks where simultaneous operation with LTE receivers is not feasible, leading to inefficient resource usage and excessive power consumption.
Innovation Solution
Implementing a configuration mechanism that allows WTRUs to receive prohibition conditions for GNSS activity, including GNSS acquisition, reporting, and assistance information reporting, based on timers, validity durations, and device characteristics, enabling override or termination of these conditions through triggering events, explicit requests, or expiration of timers, thereby optimizing GNSS activity and reducing unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS acquisition and reporting operations are continuously performed, then location accuracy and navigation performance are improved, but power consumption and resource usage increase significantly
Solution Approach 1:
The patent implements periodic GNSS acquisition and reporting operations based on configured timers and validity durations. Instead of continuous operation, the WTRU performs GNSS activities at periodic intervals determined by network configuration, allowing the system to maintain location accuracy while significantly reducing power consumption through controlled idle periods between acquisitions.
Solution Approach 2:
The patent dynamically adjusts GNSS operation modes based on network conditions, device state, and configured parameters. The WTRU transitions between active acquisition, periodic reporting, and prohibited states based on timer expiration, validity duration updates, and network assistance availability, optimizing the balance between location accuracy and power consumption according to real-time requirements.
2Speed
If GNSS acquisition operations are performed frequently, then location update speed is improved, but resource usage and operational complexity increase
Solution Approach 1:
The patent applies preliminary action by configuring prohibition conditions, timers, and validity durations in advance through network assistance information. These pre-configured parameters establish predetermined rules for when GNSS operations should occur, allowing the WTRU to automatically manage acquisition frequency without complex real-time decision-making, thus maintaining location update speed while reducing operational complexity.
3Adaptability or versatility
If simultaneous LTE and GNSS operations are implemented, then communication and navigation functions are maintained, but resource conflicts and power consumption increase
Solution Approach 1:
The patent implements periodic GNSS operations that are coordinated with LTE activity through network-configured timers and validity durations. By scheduling GNSS acquisitions and reporting at periodic intervals rather than simultaneously with LTE operations, the WTRU maintains both communication and navigation functional capabilities while reducing the power consumption associated with concurrent high-activity operations.
Data Source
AI summary
A wireless transmit receive unit (WTRU) may receive, via configuration information, at least one prohibition condition configured to prohibit GNSS activity. The GNSS activity may comprise at least one of GNSS acquisition, GNSS reporting, or GNSS assistance information (AI) reporting. The WTRU may identify a trigger related to the GNSS activity. The WTRU may determine whether a prohibition condition is activated. The prohibition condition may comprise a condition based on a prohibition timer, a condition based on GNSS validity duration, or a condition based on a characteristic of the WTRU. When the prohibition condition is determined to be active, the WTRU may perform the GNSS activity in response to an override or termination of the prohibition condition and based on the prohibition condition being determined to be active.