DMRS Port Mapping for Flexible 5G NR Co-Scheduling

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing a larger number of demodulation reference signal (DMRS) ports, particularly in 5G NR, due to limitations in DMRS port management and interference issues during co-scheduling of new and old UEs.

Innovation Solution

A system and method for determining a DMRS table that includes multiple categories of DMRS ports with varying TD-OCC configurations, allowing for increased flexibility in scheduling and reducing interference by enabling DMRS ports to be co-scheduled without causing channel transmission issues, while supporting a larger number of DMRS ports.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of DMRS ports is increased to support more wireless communication devices, then spectral efficiency and MIMO transmission capabilities are improved, but interference issues during co-scheduling of new and old UEs worsen

Engineering Contradiction:

Improvespectral efficiencyVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments DMRS ports into multiple categories (first category and second category) with different TD-OCC configurations. This segmentation allows new UEs to be scheduled with different DMRS port configurations than existing UEs, enabling the system to support more devices while managing interference through category-based separation and coordinated scheduling.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple categories of DMRS ports with varying TD-OCC configurations are implemented, then flexibility in scheduling is improved, but device complexity increases

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidDMRS port management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a universal DMRS table structure that can accommodate multiple categories of DMRS ports with different TD-OCC configurations through a single unified framework. This multi-functional approach allows the system to handle various scheduling scenarios (new UEs, existing UEs, co-scheduling) using the same table structure, reducing the need for separate management mechanisms and thereby limiting the increase in device complexity while maintaining scheduling flexibility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12587335B2Systems and methods for indicating demodulation reference signal ports for wireless communication

Publication Date: 2026.03.24 ZTE CORP

AI summary

Presented are systems and methods for wireless communication. In one aspect, a wireless communication device determines a first demodulation reference signal (DMRS) table according to first information from a wireless communication node. In one aspect, the wireless communication device receives a value of a field in a signaling from the wireless communication node. In one aspect, the wireless communication device determines a first DMRS parameter according to the first DMRS table and the value of the field. In one aspect, the first DMRS table includes a mapping between values of the field of the signaling and values of the first DMRS parameter.