ORCA Control Plane for mmWave Macro-Cell Integration

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Solution Overview

Problem

The existing LTE DuCo architecture is not fine-tuned for dense deployment scenarios with mmWave small cells, which require Gbps links and intermittent connectivity, and lacks scalability to meet 5G expectations, particularly in terms of mobility support and resilience.

Innovation Solution

The On-demand Reconfiguration C-Plane Architecture (ORCA) dynamically configures multiple logical control plane setups based on deployment density and user mobility, allowing for robust mobility support and resilience by offloading control signaling between macro and mmWave small cells, while maintaining the same underlying hardware architecture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If LTE DuCo architecture is used for macro-assisted mmWave small cells, then wide-area coverage and service robustness are provided, but mobility support and resilience to mmWave link outages are insufficient

Engineering Contradiction:

Improveresilience to mmWave link outagesVSAvoidcontrol plane architecture complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic control plane reconfiguration that allows the system to switch between different control plane architectures based on real-time conditions. When mmWave links are stable, the system uses a simplified architecture; when link outages occur or are predicted, it dynamically reconfigures to use macro cell control plane, thereby providing resilience without permanent complexity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the control plane architecture parameter dynamically based on link quality, mobility conditions, and outage scenarios. This allows the same physical infrastructure to operate in different architectural modes (macro-controlled vs. small-cell-controlled), improving reliability without requiring permanently complex infrastructure

Inventive Principle:

Principle #35Parameter changes

2Productivity

If mmWave small cells are deployed for Gbps links, then small-area throughput is boosted, but coverage area is limited and beam tracking becomes challenging

Engineering Contradiction:

Improvesmall-area throughputVSAvoidcoverage area

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

The patent merges mmWave small cell coverage with macro cell coverage in a heterogeneous network architecture. The mmWave small cells provide high-throughput hotspots while the macro cell provides wide-area coverage, and the system intelligently routes users to appropriate cells based on location, mobility, and service requirements

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The network is segmented into different functional zones: macro cell areas for wide coverage and mobility management, and mmWave small cell areas for high-throughput services. This segmentation allows each technology to operate in its optimal performance zone while contributing to overall system productivity and coverage

Inventive Principle:

Principle #1Segmentation

3Speed

If control plane is anchored at macro cell, then mobility support is improved, but small cell control signaling capacity becomes a bottleneck

Engineering Contradiction:

Improvemobility supportVSAvoidcontrol signaling capacity

Core Design Contradiction:

SpeedVSQuantity of substance

Solution Approach 1:

The control plane anchoring is made dynamic rather than static. The system can switch between macro-cell-anchored and small-cell-anchored control plane modes based on user mobility state, small cell load conditions, and link quality. This dynamic approach allows the system to distribute control signaling capacity according to real-time needs

Inventive Principle:

Principle #15Dynamics

4Productivity

If dense deployment of mmWave small cells is implemented, then spectrum utilization is improved, but control plane scalability becomes limited

Engineering Contradiction:

Improvespectrum utilizationVSAvoidcontrol plane scalability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal control plane architecture that can function in multiple modes: it can serve as a centralized controller for sparse deployments, distribute control functions across multiple small cells in dense deployments, and adapt to various mobility scenarios. This multi-functionality enables the same architecture to scale from sparse to dense deployments without fundamental redesign

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10555355B2On-demand reconfigurable control plane architecture (ORCA) integrating millimeter-wave small cell and microwave macro cell

Publication Date: 2020.02.04 MEDIATEK INC

AI summary

Millimeter-wave (mmWave) band communication is a very promising technology for 5G small cells. In practice, such a new system will coexist with legacy or evolved microwave band systems, such as E-UTRAN LTE macro-cell cellular systems, for a long time to come. Considering the typical scenarios where a macro cell offers umbrella coverage for clusters of small cells, several control plane (C-plane) architectural choices of macro-assisted 5G mmWave systems from both UE and network's perspectives are evaluated. Termed macro-assisted mmWave, an effective end-to-end integration of the futuristic mmWave small cells and microwave macro cells shall promise the benefits of both yet avoid individual limitations. The proposed On-demand Reconfiguration C-Place Architecture (ORCA) for Macro-assisted Millimeter Wave (mmWave) small cells is designed to meet 5G expectations of dense deployment of small cells and UEs and beamformed intermittent Gbps links.