Uplink Power Control for SRS Resources in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmission power, particularly for multiple sounding reference signals (SRS), which affects the quality and reliability of uplink signals and channels in next-generation mobile communication systems requiring high data traffic, increased transfer rates, and low latency.
Innovation Solution
A method for efficiently controlling uplink transmission power, including power control for multiple SRS resources, using advanced power control techniques such as pathloss compensation, power offset, and TPC commands, integrated with beamforming operations to optimize power distribution across different beams and channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is increased to support high data traffic and transfer rates, then data rate and throughput are improved, but energy consumption and interference increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power levels based on channel conditions, UE location (cell-center vs. cell-edge), and traffic requirements. Different power parameters (P0, alpha, TPC commands) are modified to optimize the trade-off between data rate and energy consumption, enabling high throughput while reducing unnecessary power usage.
Solution Approach 2:
The patent implements dynamic power control where transmission power is continuously adjusted based on real-time channel quality indicators (CQI), pathloss measurements, and network conditions. This dynamic adaptation allows the system to maintain high data rates when needed while reducing power consumption during favorable channel conditions or for cell-center UEs.
2Reliability
If transmission power is increased to ensure reliable uplink signal quality, then reliability is improved, but power consumption and interference to other users increase
Solution Approach 1:
The patent applies local quality by implementing differentiated power control strategies for different UE locations and SRS resources. Cell-edge UEs receive higher power compensation via adjusted P0 and alpha parameters, while cell-center UEs use lower power. This localized quality adjustment ensures reliable uplink signal quality for edge users without causing excessive interference from center users.
Solution Approach 2:
The patent changes power parameters dynamically based on channel conditions and UE location. Pathloss compensation factors and TPC commands are adjusted to maintain reliable signal quality only where necessary, reducing overall interference. Different SRS resources are configured with different power parameters to match local channel conditions.
3Productivity
If multiple SRS resources are configured for different beams and channels, then beamforming performance and spectral efficiency are improved, but device complexity and power management difficulty increase
Solution Approach 1:
The patent segments SRS resources into multiple distinct configurations, each associated with specific beams, channels, or UE locations. This segmentation allows independent power control for each resource, simplifying management by treating each SRS resource as a separate entity with its own power parameters rather than managing all resources uniformly.
Solution Approach 2:
The patent creates a universal power control framework that handles multiple SRS resources, beams, and channels through a unified set of parameters and procedures. The same power control mechanisms (TPC commands, pathloss compensation, P0 adjustments) are applied across all SRS resources, reducing complexity by avoiding the need for separate management systems for each resource type.
4Reliability
If power control parameters are optimized for cell-edge UEs, then fairness and coverage are improved, but overall system throughput and efficiency may be reduced
Solution Approach 1:
The patent applies local quality by implementing location-aware power control where cell-edge UEs receive enhanced power parameters (higher P0, higher alpha for pathloss compensation) to ensure coverage and fairness, while cell-center UEs use optimized lower power parameters to maintain efficiency. This localized differentiation resolves the contradiction by applying appropriate power levels based on specific UE locations rather than using uniform parameters.
Solution Approach 2:
The patent implements dynamic power parameter adjustment based on UE location, channel conditions, and traffic requirements. UEs can transition between different power control regimes as their channel conditions or locations change, allowing the system to maintain both coverage for edge users and efficiency for center users, thereby achieving both fairness and high system throughput.
Data Source
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AI summary
Disclosed are a method for transmitting and receiving an uplink in a wireless communication system and an apparatus therefore. Specifically, a method for uplink transmission by a User Equipment (UE) in a wireless communication system may include: receiving, from a base station, Sounding Reference Signal (SRS) configuration information, wherein the SRS configuration information includes a parameter set for power control of SRS for each SRS resource set and the SRS resource set includes one or more SRS resources; determining a transmission power of the SRS, based on the parameter set for power control of the SRS; and transmitting the SRS to the base station.