CCDU Network Integration for 3× MRU and GPS Time Sync

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Solution Overview

Problem

Existing Combined Centralized and Distributed Unit (CCDU) solutions provide limited support for Maximum Receive Units (MRU) and lack external synchronization capabilities, particularly for 3*3.5 GHz, and do not support additional ports for external low-cost NIC cards.

Innovation Solution

A system and method for synchronizing MRU with a physical hardware clock using a global positioning system (GPS) and network synchronizer, employing back-to-back connections over backhaul ports, and utilizing precision time protocol (PTP) time stamps to achieve synchronization across multiple ethernet controllers and network cards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If existing CCDU solutions are used, then basic functionality is provided, but support for additional MRU is limited

Engineering Contradiction:

Improvenumber of MRU supportedVSAvoidsupport for external NIC cards and synchronization

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The system segments the CCDU architecture to include separate network interfaces: a first network interface for connecting to external NIC cards and a second network interface for GPS synchronization. This segmentation allows independent enhancement of MRU capacity and synchronization capability without compromising the base functionality of existing CCDU solutions.

Inventive Principle:

Principle #1Segmentation

2Reliability

If external synchronization is added to CCDU, then synchronization capability is improved, but device complexity increases

Engineering Contradiction:

Improvesynchronization capabilityVSAvoidnumber of network interfaces and components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The first network interface is designed with multi-functionality, serving both as a connection interface for external low-cost NIC cards and as a synchronization interface through its connection to the GPS receiver. This universal design allows a single component to fulfill multiple roles, enhancing synchronization capability while minimizing the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If GPS synchronization is implemented, then time synchronization accuracy is improved, but cost and power consumption increase

Engineering Contradiction:

Improvetime synchronization accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system employs a cost-effective GPS receiver design that consumes minimal power, suitable for embedded deployment in CCDU. By selecting an economical GPS solution rather than high-end alternatives, the system achieves adequate time synchronization accuracy for telecom applications while keeping power consumption and cost at acceptable levels for distributed unit operation.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS20260025219A1System and method for device integration in a combined centralized and distributed unit

Publication Date: 2026.01.22 JIO PLATFORMS LTD

AI summary

The disclosed system and method enable providing device integration in a combined centralized and distributed unit (CCDU). Updated CCDU design provides 3× Maximum Receive Unit (MRU (700)) support with a network card (e.g.: Channel Card).