PUCCH Resource Bundling for LTE-Advanced TDD

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Solution Overview

Problem

The LTE-Advanced TDD system faces inefficiencies in PUCCH format 1a/1b resource allocation due to excessive resource consumption and increased power consumption from concurrent transmission of multiple PUCCH channels, particularly when handling multiple ACK/NACK resources across multiple component carriers and subframes.

Innovation Solution

Implementing a technique that reserves PUCCH format 1a/1b resources with a granularity of one ACK/NACK bundle, allowing for efficient allocation and transmission of ACK/NACK feedback by utilizing a single PUCCH channel, and employing DAI encoding to handle error cases and optimize resource usage across spatial, time, and component carrier domains.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple PUCCH channels are transmitted concurrently to handle multiple ACK/NACK resources across multiple component carriers and subframes, then the system can support LTE-Advanced TDD modes, but resource consumption and power consumption increase excessively

Engineering Contradiction:

Improvesupport for LTE-Advanced TDD modesVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent combines multiple ACK/NACK resources into a single PUCCH channel transmission by using resource bundling, where multiple component carriers and subframes are aggregated and transmitted through one consolidated PUCCH resource, thereby reducing power consumption while maintaining LTE-Advanced TDD compatibility

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal PUCCH resource allocation mechanism that can handle multiple component carriers and subframes through a single resource structure, allowing the same PUCCH channel to serve multiple functions across different carriers and time slots

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If multiple PUCCH channels are transmitted concurrently to handle multiple ACK/NACK resources, then ACK/NACK feedback can be provided for multiple component carriers, but resource collisions increase

Engineering Contradiction:

ImproveACK/NACK feedback capabilityVSAvoidresource collision probability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

By merging multiple ACK/NACK feedback resources into a single bundled PUCCH transmission, the patent eliminates resource collisions that would occur with concurrent transmissions, while still providing comprehensive ACK/NACK feedback for multiple component carriers through the unified resource

Inventive Principle:

Principle #5Merging (Combining)

3Manufacturing precision

If PUCCH resources are allocated with fine granularity for each ACK/NACK resource, then resource allocation precision is improved, but signaling overhead increases

Engineering Contradiction:

Improveresource allocation precisionVSAvoidsignaling overhead

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The patent combines multiple fine-grained PUCCH resource allocations into a single bundled resource allocation, reducing signaling overhead by transmitting one consolidated resource assignment instead of multiple separate assignments, while maintaining precise resource allocation through the bundled structure

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bundled PUCCH resource serves multiple functions simultaneously, allocating resources for multiple component carriers and subframes through a single universal resource structure, thereby reducing the quantity of signaling required

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2583395B1Enhanced physical uplink control channel format resource allocation for time division duplex mode

Publication Date: 2023.01.18 NOKIA SOLUTIONS & NETWORKS OY

Figure 1A~1C
Figure 1B~1D
Figure 2

AI summary

In one aspect thereof the exemplary embodiments provide a method that includes, when in a time division duplex mode of operation with a user equipment, allocating physical uplink control channel resources by reserving physical uplink control channel resources with a granularity of one acknowledge/negative acknowledge (ACK/NACK) bundle; and sending an indication of the allocated physical uplink control channel resources from a network access node to the user equipment.