UL Partial-Bandwidth Packet Format for Flexible RU Scheduling

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Solution Overview

Problem

The challenge in wireless communication systems is to achieve flexible frequency scheduling while minimizing the overhead for reporting control signaling, which increases with greater flexibility.

Innovation Solution

A transmission apparatus and method that generates a transmission signal with a non-legacy preamble comprising two channel fields for subband channels, each containing user-specific fields for per-user allocation information, and relocates BCC blocks between these fields to minimize overhead and improve channel efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexibility in frequency scheduling is increased, then adaptability in resource allocation is improved, but overhead for reporting control signaling increases

Engineering Contradiction:

Improveflexibility in frequency schedulingVSAvoidoverhead for reporting control signaling

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The control signaling is segmented into two separate channel fields (first channel field for first subband channel, second channel field for second subband channel). Each field contains only the user-specific information relevant to its corresponding subband channel, thereby dividing the total control signaling overhead into manageable segments that are transmitted separately over different frequency resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from a single-dimension control signaling approach to a two-dimensional approach by creating separate channel fields for different subband channels. This dimensional separation allows the system to maintain flexible frequency scheduling across multiple subbands while keeping the control signaling overhead for each subband independent and manageable.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If separate channel fields are created for different subband channels, then flexibility in frequency scheduling is improved, but device complexity increases

Engineering Contradiction:

Improveflexibility in frequency schedulingVSAvoidcomplexity of signal structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Each channel field is designed with local quality optimized for its specific subband channel context. The first channel field contains user-specific information tailored for the first subband channel, while the second channel field contains user-specific information tailored for the second subband channel. This localized optimization allows each field to be independently managed with appropriate complexity levels.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The complex control signaling structure is segmented into multiple independent channel fields, each handling a specific subband channel. This segmentation reduces the complexity of individual fields while maintaining the overall flexibility needed for frequency scheduling across multiple subbands.

Inventive Principle:

Principle #1Segmentation

3Productivity

If user-specific fields are distributed across multiple channel fields, then channel efficiency is improved, but difficulty of detecting and measuring increases

Engineering Contradiction:

Improvechannel efficiencyVSAvoiddifficulty of decoding control signaling

Core Design Contradiction:

ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent employs a consistent structure for multiple channel fields, where each field contains user-specific information in a standardized format. This copying of the structural template across different channel fields allows receiving devices to efficiently decode each field using the same detection logic, reducing the overall difficulty despite the distributed nature of the user-specific fields.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

Each channel field is optimized for local detection and measurement within its specific subband channel context. The user-specific fields in each channel field can be detected and measured independently, allowing receiving devices to process each subband channel separately, which improves channel efficiency while managing the complexity of detection.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250358066A1Communication apparatus and communication method

Publication Date: 2025.11.20 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

A communication apparatus includes circuitry configured to generate an uplink (UL) single-user (SU) partial bandwidth transmission packet using a first format that contains a first preamble and a data field, wherein the first preamble includes a high efficiency signaling B (HE-SIG-B) field containing resource unit (RU) allocation information indicating one of a plurality of RU arrangements and includes a plurality of user fields; and a transmitter configured to transmit the UL SU partial bandwidth transmission packet to an access point (AP). The one of the plurality of RU arrangements indicates a plurality of RUs which respectively correspond to the plurality of user fields, and one RU of the plurality of RUs is an RU allocated to the AP and other RU(s) of the plurality of RUs are RU(s) unallocated to the AP. The first format is also used for a downlink (DL) multi-user (MU) transmission.