Uplink Signal Priority Management in LTE Terminals
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Solution Overview
Problem
There is a lack of sufficient study on terminal operations when repetition transmission of uplink signals with different priorities overlap, specifically for higher priority signals with granted configuration and lower priority signals with dynamically granted configuration in LTE systems.
Innovation Solution
A terminal is designed to repeatedly transmit uplink signals with prioritization, determining the drop of overlapping signals to ensure appropriate transmission of higher priority signals by managing the overlap between higher priority and lower priority Physical Uplink Shared Channel (PUSCH) transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal transmits both first uplink signal (higher priority) and second uplink signal (lower priority) simultaneously, then communication throughput is improved, but signal reliability deteriorates due to interference and resource conflicts
Solution Approach 1:
The patent segments the uplink signal transmission by dividing it into multiple repetitions with different priority levels. The first uplink signal (higher priority) and second uplink signal (lower priority) are transmitted in separate time resources through repetition, allowing the terminal to transmit both signals while maintaining their respective reliabilities by avoiding simultaneous transmission conflicts.
Solution Approach 2:
The patent applies preliminary action by determining in advance which repetition of the second uplink signal should be dropped when it overlaps with the first uplink signal. The terminal pre-configures the transmission plan, identifying that certain repetitions of lower priority signals must be sacrificed to ensure the reliability of higher priority signals, thus avoiding real-time decision conflicts.
2Reliability
If the terminal drops overlapping lower priority signals to ensure higher priority signal transmission, then signal reliability is improved, but power consumption increases due to repeated transmissions
Solution Approach 1:
The patent applies partial action by transmitting only the necessary number of repetitions required to achieve reliable delivery of the higher priority signal. Instead of transmitting all configured repetitions unconditionally, the terminal selectively drops overlapping lower priority repetitions, performing just enough transmission to ensure reliability while minimizing unnecessary power consumption from redundant transmissions.
Solution Approach 2:
The patent changes the transmission parameter of the second uplink signal dynamically based on overlap conditions. When a repetition of the lower priority signal overlaps with a higher priority signal, the terminal modifies the transmission parameter by dropping that specific repetition, thereby adapting the power consumption level to the actual communication needs while maintaining higher priority signal reliability.
3Loss of information
If the terminal transmits all configured uplink signal repetitions, then data completeness is improved, but transmission efficiency deteriorates due to resource waste from dropping and retransmitting signals
Solution Approach 1:
The patent applies preliminary action by pre-determining which repetitions of the second uplink signal will be dropped before transmission begins. The terminal calculates in advance the impact of dropping certain repetitions on data completeness and transmission efficiency, selecting an optimal dropping pattern that minimizes retransmission needs while maintaining acceptable data integrity, thus improving overall transmission efficiency.
Data Source
AI summary
This terminal includes: a transmission unit that repeatedly transmits one or both of a first uplink signal which has a first priority level and which is given a configured uplink grant, and a second uplink signal which has a second priority level that is a lower priority level than the first priority level and which is given a dynamic uplink grant; and a control unit that determines to drop any second uplink signal that overlaps with the transmission timing of a first uplink signal.