Wireless Measurement Window Configuration for Non-Terrestrial Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring measurements for communications devices in non-terrestrial network cells, particularly due to propagation delays caused by the movement of non-terrestrial network parts relative to communications devices and ground stations.
Innovation Solution
A method is introduced to configure communications devices in serving cells of wireless communication networks with non-terrestrial network parts, involving establishing a connection, identifying candidate cells, determining if both cells are provided by a non-terrestrial network part, and configuring the device to measure signals within a determined measurement window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement windows are configured for communications devices in non-terrestrial network cells, then service continuity is improved, but measurement precision deteriorates due to propagation delays caused by movement of non-terrestrial network parts
Solution Approach 1:
The measurement window configuration is made dynamic by adjusting the timing based on the relative motion between non-terrestrial network parts and communications devices. The system calculates propagation delays considering the movement of satellites or airborne vehicles and dynamically adjusts measurement window positions and durations to maintain measurement accuracy despite changing geometric relationships.
Solution Approach 2:
The system performs preliminary calculation of propagation delays and measurement window configurations before actual measurements are taken. By pre-computing the expected timing offsets based on known orbital or flight paths and device locations, the system prepares appropriate measurement window parameters in advance, allowing accurate measurements to be performed during the actual measurement phase.
2Measurement precision
If measurement windows are extended to accommodate propagation delays, then measurement precision is maintained, but time efficiency deteriorates due to longer measurement periods
Solution Approach 1:
The system changes multiple parameters of the measurement window configuration simultaneously - adjusting both the timing offset and the duration based on the calculated propagation delay. By optimizing these parameters together rather than simply extending the window, the system maintains measurement accuracy while minimizing the time penalty. The measurement window duration is set to the minimum necessary value that still accommodates the propagation delay variation.
3Reliability
If frequent measurements are performed to maintain service continuity in moving non-terrestrial networks, then reliability is improved, but device complexity increases due to measurement configuration management
Solution Approach 1:
The system implements feedback mechanisms where measurement results and device location information are continuously reported back to the network. Based on this feedback, the network dynamically adjusts measurement configuration parameters for subsequent measurement cycles. This closed-loop approach allows the system to maintain service continuity through frequent measurements while reducing device complexity by having the network manage the complex configuration adjustments based on received feedback.
Data Source
AI summary
A method of configuring a communications device in a wireless communications network comprising a non-terrestrial network part, the method comprising: establishing a connection in a serving cell between the communications device and the wireless communications network for transmitting data to and receiving data from the communications device, identifying a candidate cell for a handover of the communications device, determining that one or both of the serving cell and the candidate cell is provided by a non-terrestrial network part of the wireless communications network, based on the determining that one or both of the serving cell and the candidate cell is provided by a non-terrestrial network part of the wireless communications network, determining as a measurement window a time period during which the communications device can receive measurement signals transmitted in the candidate cell, and configuring the communications device to measure the measurement signals received within the measurement window.