Uplink Data Transmission Timing for Deep-Coverage Power Compliance
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Solution Overview
Problem
In deep-coverage wireless communication scenarios, the low transmit power of terminal devices results in weak signals that are difficult for base stations to receive, leading to poor demodulation performance, despite adhering to maximum power limits, and existing repetition methods do not effectively enhance coverage in varying channel conditions.
Innovation Solution
The terminal device determines specific transmission times and powers within allocated time frames to optimize data transmission, allowing higher power usage within certain time segments while staying within regulatory limits, thereby improving demodulation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device repeatedly sends PUSCH in N consecutive slots with relatively low power to ensure compliance with maximum power limits, then the transmit power constraint is satisfied, but the transmission performance and demodulation performance deteriorate
Solution Approach 1:
The patent applies periodic action by allowing the terminal device to send PUSCH in a subset of slots (k slots out of N consecutive slots) rather than every slot. This periodic transmission pattern with higher power in selected slots achieves both compliance with average power limits and improved transmission performance through enhanced signal strength in critical transmission opportunities.
Solution Approach 2:
The patent changes the transmission parameters dynamically by adjusting both the number of transmission slots and the power level. Instead of fixed low-power repeated transmissions, the terminal device transmits at higher power in k selected slots while maintaining average power compliance, effectively changing the power and time distribution parameters to optimize performance.
2Loss of energy
If the terminal device sends PUSCH in all N consecutive slots with low power, then the average transmit power remains within limits, but the demodulation performance at the base station deteriorates due to signal weakness
Solution Approach 1:
The patent implements periodic action by selecting k specific slots out of N consecutive slots for PUSCH transmission. This periodic pattern allows the terminal device to concentrate energy in fewer transmissions, improving signal strength and demodulation performance while maintaining compliance with average power limits through strategic slot selection.
Solution Approach 2:
The patent modifies transmission parameters by changing both the time distribution (k slots out of N) and power level (higher power in selected slots). This parameter optimization enables the terminal device to achieve better demodulation performance by sending stronger signals in selected slots while keeping the average power within regulatory limits.
3Measurement precision
If the terminal device increases transmit power to improve signal strength for deep coverage, then the signal reception quality improves, but the transmit power exceeds the maximum power value specified in law or regulation
Solution Approach 1:
The patent applies periodic action by enabling the terminal device to transmit at higher power in k selected slots out of N consecutive slots. This periodic high-power transmission improves signal reception quality in deep coverage scenarios while the average power across all N slots remains compliant with regulatory limits, resolving the contradiction between signal strength and power compliance.
Solution Approach 2:
The patent resolves the contradiction by changing the power parameter distribution over time. The terminal device transmits at higher power levels in selected slots to improve signal reception quality, while the overall average power parameter remains within regulatory limits through strategic selection of transmission slots and power levels.
4Loss of time
If the terminal device reduces the number of PUSCH repetitions to save transmission time, then the transmission efficiency improves, but the coverage enhancement effect deteriorates in deep-coverage scenarios
Solution Approach 1:
The patent applies periodic action by transmitting PUSCH in k selected slots out of N consecutive slots rather than in all N slots. This periodic transmission pattern reduces the total transmission time while maintaining coverage enhancement effect through higher power transmission in the selected slots, effectively resolving the contradiction between transmission time and coverage enhancement.
Solution Approach 2:
The patent changes the transmission parameters by reducing the number of transmission slots from N to k while increasing the power level in those k slots. This parameter optimization achieves both reduced transmission time and maintained coverage enhancement effect, as the higher power in fewer slots compensates for the reduced repetition count.
Data Source
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AI summary
Embodiments of this application provide a data transmission method, an apparatus, and a system. The method includes: A terminal device determines first transmission time, and sends uplink data at a first power within the first transmission time. Correspondingly, a network device determines the first transmission time, and receives the uplink data within the first transmission time. Second transmission time includes the first transmission time, the first transmission time includes N1 time units, the second transmission time includes N2 time units, N1 is a positive integer, and N2 is a positive integer greater than N1.