Terminal Transmit Power Control for Fast Gateway Switching
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Solution Overview
Problem
Existing power control systems in radio terminals face inefficiencies due to sudden changes in time-variant parameters, leading to time-consuming and resource-wasteful ranging procedures during gateway switching, and inaccuracies from pre-calculated power requirements.
Innovation Solution
Implement a method for radio terminal power control that uses measured data to calculate initial Power Across Frequency (PAF) values and employs a tracking system to adapt to variations, allowing flexible IR layouts and reducing the need for repeated ranging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pre-calculated power values are used to combat large step changes, then power control stability is improved, but measurement precision and accuracy deteriorate due to link budget assumptions and inability to track variations
Solution Approach 1:
The system implements feedback by continuously measuring actual power requirements at the terminal and reporting them to the gateway. The gateway stores these measured values and uses them to determine power allocations for gateway switches, ensuring that power control decisions are based on actual measurements rather than pre-calculated assumptions.
Solution Approach 2:
The system performs preliminary ranging procedures to establish initial power requirements before gateway switching occurs. These pre-measured values are stored in the gateway and readily available for immediate use during gateway switches, eliminating the need for time-consuming ranging procedures at the moment of switching.
2Measurement precision
If ranging procedure is repeated during gateway switching, then power control accuracy is maintained, but time consumption and resource usage increase significantly
Solution Approach 1:
The system performs ranging procedures in advance before gateway switching and stores the measured power requirements in the gateway. When a gateway switch is needed, the pre-measured values are immediately retrieved and applied, eliminating the need to repeat the time-consuming ranging procedure during the actual switch.
Solution Approach 2:
The gateway creates and stores copies of terminal power requirement measurements obtained during initial ranging. These copied values are then reused during gateway switching events, avoiding the need to perform new measurements and significantly reducing switching delays.
3Device complexity
If pre-calculated power values are used, then device complexity is reduced, but adaptability deteriorates because time variant parameters like frequency and modulation changes cannot be tracked
Solution Approach 1:
The system continuously measures actual power requirements at the terminal and feeds back these measurements to the gateway. This feedback mechanism automatically captures variations due to frequency changes, modulation changes, and other time-variant parameters, allowing the system to adapt without increasing complexity.
Solution Approach 2:
The terminal autonomously measures its own power requirements and reports them to the gateway. This self-service approach allows the system to automatically track and adapt to changing conditions without requiring complex centralized control or pre-programmed responses to various scenarios.
4Reliability
If gateway switching is performed using existing design, then connectivity is maintained, but productivity decreases due to minutes-long ranging delays for all terminals
Solution Approach 1:
The gateway pre-stores power requirement measurements for all terminals before switching occurs. During gateway switching, these pre-prepared values are immediately applied to all terminals simultaneously, enabling rapid switching without the need to perform sequential ranging procedures that previously delayed the process by minutes.
Solution Approach 2:
The gateway utilizes stored copies of terminal power measurements to rapidly execute gateway switching. By copying and applying pre-measured power values to all terminals at once, the system maintains connectivity reliability while dramatically improving switching speed and overall productivity.
Data Source
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AI summary
A system and method for managing a transmit power of a terminal includes dividing a spectrum into frequency bins and an inroute layout including inroutes; mapping at least one of the frequency bins with each of the inroute; determining a respective normalized Transmit Power (TP) for each of the frequency bins; calculating a transmission TP based on the respective normalized TP of one or more of the frequency bins mapped to a selected inroute; and transmitting a radio signal with the transmission TP on the selected inroute. A first frequency bin is adjacent a second frequency bin, a respective normalized TP of the first frequency bin compared to a respective normalized TP of the second frequency bin varies no more than a threshold power delta, a count of frequency bins is greater than one and unequal to a count of the inroute layout.