UE Capability Signaling for 1024QAM Baseband Scaling

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Solution Overview

Problem

Current wireless communication systems lack an efficient mechanism for UEs to signal higher modulation order baseband capabilities, leading to excessive overhead in carrier aggregation combination entries and potential exceeding of baseband processing capabilities.

Innovation Solution

The described techniques enhance UE capability parameter signaling by transmitting a UE category identifier and a baseband capability parameter, which includes a scaling factor for modulation orders and maximum supported data rates, allowing UEs to efficiently signal 1024QAM capabilities across multiple band combinations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If UE capability parameter signaling is extended to support higher modulation order baseband capability, then signaling efficiency for 1024QAM capabilities is improved, but device complexity increases

Engineering Contradiction:

Improvesignaling efficiencyVSAvoidcapability signaling complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extends existing UE capability parameter signaling by introducing new parameters (baseband capability parameter with scaling factor) to represent higher modulation order capabilities. This allows efficient signaling of 1024QAM capabilities across multiple band combinations without requiring completely new signaling mechanisms, thus improving signaling efficiency while managing complexity through parameter extension rather than structural overhaul

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If UE transmits detailed baseband capability parameters, then baseband processing capability accuracy is improved, but signaling overhead increases

Engineering Contradiction:

Improvebaseband processing capability accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent extracts the essential baseband capability information into a compact baseband capability parameter that includes a scaling factor. This extracted parameter captures the critical processing capability details needed for higher modulation orders while avoiding transmission of redundant information, thus maintaining accuracy while reducing signaling overhead

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of signaling detailed capability information directly, the patent uses a scaling factor that allows the base station to infer complete baseband processing capabilities from the UE category identifier and baseband capability parameter combination. This inverted approach reduces overhead while preserving measurement precision

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11374677B2Signaling of higher modulation order baseband capability

Publication Date: 2022.06.28 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. More specifically, the methods, systems, and devices support extending capability signaling to support higher modulation order baseband capability, such as higher order quadrature amplitude modulation (QAM), for example, 1024QAM. By way of example, a user equipment (UE) may transmit UE capability information to a base station (e.g., eNodeB (eNB), next-generation NodeB ((gNB)) in a connection establishment procedure. The UE capability information may include a UE category identifier and a baseband capability parameter. The baseband capability parameter may indicate a scaling factor for a first modulation order of a plurality of available modulation orders. The UE may communicate with the base station over multiple layers using corresponding modulation orders for the multiple layers.