GNSS Measurement Gap Timing for Connected IoT Data Transmission
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Solution Overview
Problem
Existing satellite communication systems for IoT devices cannot perform GNSS measurement and data transmission simultaneously, requiring time-separated operations which fail to meet the need for continuous position information and stable data transmission in connected states.
Innovation Solution
A method and apparatus that utilize a MAC CE to trigger GNSS measurement by determining a time-domain starting position based on a first-in-sequence effective time slot, allowing for accurate GNSS measurement gaps within the connected state without disrupting data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS measurement and data transmission are performed simultaneously, then position information can be obtained continuously, but the terminal device complexity increases and measurement accuracy decreases
Solution Approach 1:
The patent segments the time domain by introducing measurement gaps that separate GNSS measurement operations from data transmission operations. The terminal device performs GNSS measurement during specific gap periods when no data transmission occurs, thereby avoiding simultaneous operations and reducing device complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent implements periodic GNSS measurement by establishing measurement gaps at regular intervals during the connected state. The network device configures these periodic gaps, allowing the terminal device to perform GNSS measurement at predetermined time intervals without continuously interfering with data transmission, thus balancing measurement needs with communication efficiency.
2Loss of information
If GNSS measurement is performed during connected state, then continuous position information is obtained, but data transmission stability is affected
Solution Approach 1:
The patent segments the time domain by introducing measurement gaps that separate GNSS measurement operations from data transmission operations. The terminal device performs GNSS measurement during specific gap periods when no data transmission occurs, thereby avoiding simultaneous operations and reducing device complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces measurement gaps as intermediary time periods that mediate between GNSS measurement requirements and data transmission needs. These gaps act as buffers that allow position information to be obtained without directly interfering with ongoing data transmission, thus maintaining both continuity and stability.
3Measurement precision
If measurement gap is established frequently, then position information is updated continuously, but data transmission efficiency decreases
Solution Approach 1:
The patent implements periodic GNSS measurement by establishing measurement gaps at regular intervals during the connected state. The network device configures these periodic gaps, allowing the terminal device to perform GNSS measurement at predetermined time intervals without continuously interfering with data transmission, thus balancing measurement needs with communication efficiency.
Solution Approach 2:
The patent allows dynamic adjustment of measurement gap parameters including gap duration, gap frequency, and timing based on current system conditions. The network device can modify these parameters to optimize the balance between position information update frequency and data transmission efficiency, adapting to varying operational requirements.
Data Source
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AI summary
A GNSS measurement method, apparatus, and device. The method includes: a terminal device (101) receives (301) a medium access control control element (MAC CE) sent by a network device (102), the MAC CE being used to trigger the terminal device (101) to perform GNSS measurement, determines (302) a time-domain starting position of a GNSS measurement gap according to a first-in-sequence effective time slot of the MAC CE, and performs GNSS measurement within the measurement gap. In this way, the terminal device (101) can accurately determine the GNSS measurement gap according to the first-in-sequence effective time slot of the MAC CE and perform GNSS measurement within the measurement gap. This can meet the requirement of measuring the position information of the terminal device (101) in the connected state and ensure normal data transmission.