Secondary Cell PUCCH Grouping for Primary Cell Load Relief

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing multiple physical uplink control channels (PUCCH) due to high load on the primary cell, leading to inefficiencies in resource allocation and transmission capacity.

Innovation Solution

The implementation of PUCCH groups, where cells are grouped into multiple PUCCH groups, allowing PUCCH transmission on both the primary cell and secondary cells, thereby offloading the primary cell load and enhancing transmission capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If PUCCH transmission is concentrated on the primary cell, then control signaling is simplified, but the primary cell load increases and resource utilization decreases

Engineering Contradiction:

Improvecontrol signaling structureVSAvoidresource utilization

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent segments the control channel transmission by introducing multiple PUCCH groups (first PUCCH group and second PUCCH group). Each group handles control signaling for specific cells, distributing the load from the primary cell to secondary cells. This segmentation resolves the contradiction by maintaining structured control signaling while improving resource utilization through load distribution.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If PUCCH transmission is concentrated on the primary cell, then resource allocation is simpler, but transmission capacity is limited

Engineering Contradiction:

Improveresource allocation mechanismVSAvoidtransmission capacity

Core Design Contradiction:

Device complexityVSPower

Solution Approach 1:

The patent extends the control channel transmission from a single-cell dimension to a multi-cell dimension by configuring multiple PUCCH groups across different cells. This dimensional expansion allows the system to maintain simple resource allocation within each group while significantly increasing overall transmission capacity by utilizing resources across multiple cells simultaneously.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If multiple PUCCH groups are configured, then primary cell load is reduced and transmission capacity increases, but system complexity increases

Engineering Contradiction:

Improvetransmission capacityVSAvoidPUCCH group management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the system into manageable PUCCH groups with clear boundaries and responsibilities. Each group is associated with specific cells and has dedicated resource allocations, making the complexity modular rather than monolithic. This segmentation allows the system to scale capacity by adding groups while keeping individual group management relatively simple.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic management of PUCCH groups through activation and deactivation mechanisms. The network can flexibly configure, activate, or deactivate specific PUCCH groups based on traffic conditions and resource availability, allowing the system to adapt complexity to actual needs rather than maintaining fixed high complexity regardless of usage conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250358085A1Secondary Cell Management in Wireless Communications

Publication Date: 2025.11.20 COMCAST CABLE COMM LLC

AI summary

Secondary cell management in wireless communications is described. A cell group may comprise a plurality of secondary cells. The cell group may comprise a first cell with a control channel. The wireless device may activate or deactivate the first cell. While the first cell is deactivated, each secondary cell of the cell group may be deactivated.