Uplink Power Allocation for PDCP Duplication
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Solution Overview
Problem
Current 5G wireless systems face challenges in coordinating power allocation across multiple transmission legs, leading to decreased communication reliability, increased packet delay, and wasteful power usage due to the lack of coordination in power control across legs, especially in scenarios requiring high reliability and low latency like URLLC.
Innovation Solution
A network-assisted method is introduced to estimate and signal a power allocation function based on radio channel statistics and network performance metrics, allowing coordinated real-time power control across multiple legs, optimizing power split to enhance reliability, throughput, and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power control is not coordinated across multiple transmission legs, then device complexity is reduced, but communication reliability decreases and power usage becomes inefficient
Solution Approach 1:
The patent introduces a network node as an intermediary that estimates channel quality indicators (CQI) for each transmission leg and determines optimal power allocation. This intermediary computes the power allocation function based on channel statistics and signals it to the user equipment, thereby resolving the complexity of coordinated power control while improving communication reliability through optimized power distribution across multiple legs.
2Use of energy by moving object
If power is allocated without coordination across legs, then ease of operation is improved, but power usage efficiency deteriorates
Solution Approach 1:
The network node performs preliminary estimation of channel quality indicators and computation of the power allocation function before transmission. By pre-determining the optimal power allocation based on channel statistics and signaling it to the user equipment, the system achieves efficient power usage without requiring complex real-time coordination operations at the user equipment side.
3Reliability
If coordinated power control is implemented across multiple legs, then communication reliability increases, but device complexity increases
Solution Approach 1:
The network node serves as an intermediary that centralizes the complex computations for power allocation. It estimates channel quality indicators, computes the power allocation function based on channel statistics, and signals the result to user equipment. This approach maintains high communication reliability through coordinated power control while minimizing device complexity by performing complex operations at the network side.
4Loss of energy
If power allocation is optimized across multiple legs, then power usage efficiency improves, but computational requirements increase
Solution Approach 1:
The network node acts as an intermediary that performs the computationally intensive tasks of estimating channel quality indicators and computing the power allocation function. By centralizing these computational requirements at the network side rather than at user equipment, the system achieves optimized power usage efficiency while managing computational complexity through centralized processing.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for real-time uplink (UL) power control are provided. One method may include estimating, by a network node, a power allocation function for determining power allocation across a plurality of legs that transmit simultaneously, the power allocation function being based on radio channel statistics and network performance metrics. The method may then include signaling, to a user equipment, the power allocation function and the parameters used to compute an output of the power allocation function.