User Equipment DPD Training via Secondary Network

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Solution Overview

Problem

Current digital pre-distortion (DPD) training in wireless communication systems is limited by the need for allocated resources from base stations, which can lead to insufficient bandwidth and delayed configuration, resulting in inefficiencies and retransmissions due to unaddressed non-linearities in the transmission signal.

Innovation Solution

The use of a secondary network, such as an unlicensed Wi-Fi network, allows user equipment (UE) to independently configure and perform DPD training by selecting transmission timing and waveform, thereby bypassing limitations imposed by the primary licensed network, ensuring timely and accurate DPD adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If DPD training is performed using allocated resources from base station, then network coordination is maintained, but bandwidth is insufficient and configuration is delayed

Engineering Contradiction:

Improvenetwork coordinationVSAvoidDPD training speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent introduces a secondary network as an intermediary channel for DPD training. The UE performs DPD training over the secondary network (e.g., Wi-Fi) instead of directly over the primary cellular network, allowing the primary network to maintain reliability while the secondary network provides sufficient bandwidth and fast configuration for DPD training.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If DPD training is performed using allocated resources from base station, then network control is maintained, but retransmissions occur due to unaddressed non-linearities

Engineering Contradiction:

Improvenetwork controlVSAvoidretransmission overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent enables preliminary DPD training to be performed over the secondary network before actual data transmission over the primary network. This preliminary action addresses non-linearities in advance, ensuring that when data transmission occurs, the DPD parameters are already optimized, thereby preventing retransmissions and reducing energy loss.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If UE independently configures DPD training using secondary network, then bandwidth and configuration speed improve, but network resource consumption increases

Engineering Contradiction:

ImproveDPD training efficiencyVSAvoidUE power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent extracts the DPD training function from the primary cellular network and moves it to a secondary network. This separation allows the primary network to focus on reliable data transmission while the secondary network handles the training function, improving overall efficiency without significantly increasing UE power consumption since the secondary network operations can be performed during idle periods.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP3777063B1Performing digital pre-distortion (DPD) training using a secondary network

Publication Date: 2025.01.08 QUALCOMM INC

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AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine that a digital pre-distortion (DPD) training is to be performed by a modem, wherein the modem is configured to facilitate communication between the UE and a primary network associated with the UE, and configure the modem to perform the DPD training using a secondary network associated with the UE. Numerous other aspects are provided.