UE Feedback Signaling Power Control via Scheduling Assignment Difference
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Solution Overview
Problem
Current power control methods in radio access networks, particularly in 5G networks, face challenges in accurately estimating the power level for reliable transmission of feedback signaling, leading to inefficiencies in resource utilization and interference management.
Innovation Solution
A method is introduced where user equipment (UE) calculates the power level for feedback signaling based on the difference between expected and received scheduling assignments, using values V and U, which represent total and actual scheduling assignments across cells, carriers, and bandwidth parts, to improve the accuracy of power control and reduce missed assignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to ensure reliable reception of feedback signaling, then reception reliability is improved, but interference with other signaling increases
Solution Approach 1:
The patent changes the power control parameter from a fixed or简单地 calculated value to one that is dynamically adjusted based on the difference between expected and received scheduling assignments. This parameter change allows the system to adapt transmission power to actual channel conditions and assignment reception status, achieving reliable reception while minimizing unnecessary interference.
Solution Approach 2:
The patent implements a feedback mechanism where the UE monitors scheduling assignments and provides feedback about missed assignments. The network uses this feedback to adjust power control parameters, creating a closed-loop system that optimizes transmission power based on actual reception conditions, thereby improving reliability while controlling interference.
2Object-generated harmful factors
If transmission power is decreased to limit interference, then interference is reduced, but reception reliability deteriorates
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on the difference between expected and received scheduling assignments. When missed assignments are detected, the system increases power for critical signaling; when assignments are received successfully, power is reduced to minimize interference, thus resolving the contradiction between interference reduction and reliability maintenance.
Solution Approach 2:
The patent introduces dynamic power control that adapts to changing channel conditions and assignment reception status. Rather than using fixed power levels, the system continuously adjusts power based on real-time feedback about scheduling assignment reception, enabling it to maintain reliability when needed and reduce interference when conditions permit.
3Productivity
If power control accuracy is improved for feedback signaling, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent improves power control accuracy by changing the parameter calculation method to use the difference between expected and received scheduling assignments. This parameter change enhances resource utilization efficiency by ensuring appropriate power levels for feedback signaling without requiring complex additional mechanisms, thus improving productivity with minimal complexity increase.
4Productivity
If the number of scheduling assignments is increased to improve resource allocation, then resource allocation capability is improved, but power control accuracy deteriorates
Solution Approach 1:
The patent implements feedback monitoring of scheduling assignment reception to maintain power control accuracy even when the number of assignments increases. By tracking which assignments are successfully received and which are missed, the system can adjust power levels accordingly, ensuring accurate power control despite higher resource allocation capacity.
Solution Approach 2:
The patent adjusts power control parameters based on the actual number of received scheduling assignments versus expected assignments. This parameter adaptation allows the system to maintain accurate power control even when handling a large number of assignments across multiple cells, carriers, and bandwidth parts, thus resolving the contradiction between resource allocation capability and power control accuracy.
Data Source
AI summary
There is disclosed a method of operating a user equipment in a radio access network. The method includes transmitting feedback signaling pertaining to a plurality of cells, the feedback signaling being transmitted at a power level, the power level being based on a difference between a value V and a value U, the value V being indicative of the total number of scheduling assignments the user equipment is expected to receive for the plurality of cells, and the value U being indicative of the total number of scheduling assignments for the plurality of cells received by the user equipment. The disclosure also pertains to related devices and methods.