NTN Transmission Power Adaptation for Long-Delay 5G Scheduling
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Solution Overview
Problem
Existing technologies have not effectively addressed the challenges of integrating non-terrestrial networks, such as satellites, into the 5G ecosystem, particularly in terms of latency and transmission power management.
Innovation Solution
The implementation of a non-terrestrial network, such as spaceborne vehicles or airborne vehicles, as entities, such as satellites, into the 5G ecosystem, particularly in terms of latency and transmission power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is scheduled based on initial channel status report, then scheduling can be performed, but transmission reliability deteriorates due to channel condition variations during long round-trip time
Solution Approach 1:
The patent implements a feedback mechanism where the NTN entity receives an initial channel status report from the UE, performs scheduling, then receives updated channel status reports during the transmission process. This feedback loop allows the system to adapt to channel condition changes that occur during the long round-trip time, thereby maintaining transmission reliability while preserving scheduling efficiency.
Solution Approach 2:
The patent makes the transmission power dynamic by allowing it to be adjusted based on updated channel status reports received during the transmission process. Instead of using a fixed power level determined at scheduling time, the system can adapt the transmission power to match current channel conditions, resolving the contradiction between maintaining scheduling efficiency and ensuring transmission reliability.
2Reliability
If transmission power is increased to compensate for channel variations, then transmission reliability improves, but energy consumption increases
Solution Approach 1:
The feedback mechanism enables the system to receive updated channel status reports and adjust transmission power accordingly. This allows transmission power to be increased only when and where channel conditions deteriorate, rather than maintaining high power levels continuously. Thus, transmission reliability is maintained during critical periods while energy consumption is minimized during periods of good channel conditions.
Solution Approach 2:
The patent changes the transmission power parameter dynamically based on received channel status information. By adjusting this parameter in response to actual channel conditions rather than using a fixed high value, the system achieves reliable transmission when needed while minimizing energy consumption during normal operating conditions.
3Reliability
If updated channel status is determined and transmission power is adapted in real-time, then transmission reliability improves, but device complexity increases
Solution Approach 1:
The feedback mechanism provides updated channel status information that enables reliable transmission power adaptation. The processing complexity is managed by leveraging existing channel status reporting infrastructure and focusing computations on power adaptation decisions rather than full channel re-evaluation, thus achieving improved reliability with controlled increases in device complexity.
Data Source
AI summary
The present disclosure relates to an NTN entity comprising the following. A receiver of the NTN entity receives a channel status report from a user equipment, UE, the channel status report providing information on a channel between the UE and the NTN entity. A transmitter of the NTN entity forwards the received channel status report to a base station. The receiver receives scheduling information from the base station regarding a downlink or uplink transmission of the data with for the UE. A processor of the NTN entity determines an updated channel status. The processor determines whether to adapt a transmission power for the downlink or uplink transmission according to the received scheduling information, based on the updated channel status. The processor, when having determined to adapt the transmission power, adapts the transmission power for the downlink or uplink transmission.