Uplink Signal Power Management in Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in new radio access technology and LTE, there is a challenge in reducing packet data latency and efficiently managing uplink signal transmission across multiple transmission time intervals, numerologies, and carrier aggregation scenarios, where the transmission power of user equipment (UE) may exceed its maximum capacity.
Innovation Solution
A method and apparatus for a user equipment (UE) to determine if the transmission power of multiple uplink channels exceeds its maximum power, and to prioritize and potentially drop channels of lower priority to prevent power overload, using a preset priority rule that considers factors such as transmission time interval length, channel type, presence of uplink control information, demodulation reference signals, cell index, and physical uplink control channel groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits multiple uplink channels simultaneously on multiple serving cells, then the data transmission capacity is improved, but the transmission power exceeds the maximum power capacity of the UE
Solution Approach 1:
The patent applies local quality by differentiating priority levels for different uplink channels. High-priority channels (e.g., PUCCH, PUSCH with UCI) are guaranteed transmission power first, while low-priority channels (e.g., PUSCH without UCI) are transmitted only when power is available. This selective power allocation ensures critical data transmission while managing overall power consumption within UE capacity.
Solution Approach 2:
The patent segments the uplink channels into different priority groups and processes them separately. By dividing channels into high-priority and low-priority categories, the system can independently manage power allocation for each segment, ensuring that power constraints do not prevent transmission of critical information while still allowing non-critical data transmission when power permits.
2Reliability
If the UE prioritizes high-priority uplink channels, then the reliability of critical data transmission is improved, but the transmission of low-priority channels is reduced or dropped
Solution Approach 1:
The patent implements partial action by transmitting only the necessary high-priority channels when power is limited, rather than attempting to transmit all channels simultaneously. When power is sufficient, the system progressively adds low-priority channel transmission. This approach ensures critical data reliability while maximizing overall transmission volume within power constraints.
Solution Approach 2:
The patent dynamically changes transmission parameters including power allocation, channel selection, and modulation schemes based on available power and channel conditions. By adjusting these parameters in real-time, the system maintains high-priority channel reliability while optimizing the transmission of low-priority channels to maximize overall productivity.
3Adaptability or versatility
If the UE transmits uplink channels with different TTI lengths, then the system supports diverse service requirements and adaptability is improved, but the power management complexity increases
Solution Approach 1:
The patent implements a universal power management framework that handles multiple uplink channel types (PUCCH, PUSCH, PRACH) with different TTI lengths through a single priority-based allocation mechanism. This multi-functional approach allows the system to support diverse service requirements (e.g., URLLC, eMBB, mMTC) while using a unified power management process, thereby reducing overall system complexity despite the diversity of channel types.
Solution Approach 2:
The patent manages complexity by dynamically adjusting transmission parameters such as power levels, TTI lengths, and channel selections based on service requirements and power availability. This parameter adaptation allows the system to handle diverse services efficiently without requiring separate complex management mechanisms for each channel type.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
A method by which a terminal transmits an uplink signal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining whether transmission power of a plurality of uplink channels, which are simultaneously transmitted in a plurality of serving cells and has transmission time intervals (TTIs) of different lengths, exceeds maximum power of a terminal; and transmitting an uplink channel excluding an uplink channel, which is determined according to a preset priority rule, among the plurality of uplink channels when the transmission power of the plurality of uplink channels exceeds the maximum power of the terminal.