Communication Device Sub-band Signal Isolation

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Solution Overview

Problem

In in-vehicle wireless communication scenarios, overlapping time-frequency resources between different communication links or domains lead to interference with transmission of physical layer control signaling, system information, acknowledgment/negative acknowledgment feedback information, and scheduling request information, affecting transmission performance.

Innovation Solution

A communication method where a secondary node transmits signals in a first sub-band within a first frequency domain resource, which is located in the middle of M sub-bands, ensuring that the transmission resource is limited to one sub-band and does not exceed its boundaries, thereby minimizing interference by keeping the resource used for transmission far away from those used by other nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If time-frequency resources are shared between different communication links or domains, then resource utilization efficiency is improved, but interference between different vehicles or domains increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidinterference between communication links

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The frequency domain resource is segmented into multiple sub-bands, and the first frequency domain resource is further divided into M sub-bands. The first sub-band is specifically selected for transmitting the first signal, isolating it from other communications and reducing interference while maintaining efficient resource utilization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different sub-bands are assigned different functions: the first sub-band is dedicated to transmitting the first signal (physical layer control signaling, system information, ACK/NACK feedback, scheduling request, or access request), while other sub-bands can be used for different purposes. This local differentiation reduces interference for critical signals.

Inventive Principle:

Principle #3Local quality

2Productivity

If frequency domain resources are allocated to multiple communication links, then communication capacity is improved, but transmission reliability of critical signals deteriorates due to interference

Engineering Contradiction:

Improvecommunication capacityVSAvoidtransmission reliability of physical layer control signaling

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The method performs preliminary allocation of the first sub-band within the first frequency domain resource specifically for critical signals before transmission. This advance arrangement ensures that physical layer control signaling, system information, and other critical data are protected from interference by other communications.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the first frequency domain resource is used for both first signal and first service data, then resource efficiency is improved, but interference to the first signal increases

Engineering Contradiction:

Improveresource efficiencyVSAvoidinterference to first signal

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The first frequency domain resource is divided into M sub-bands, and the first sub-band is specifically extracted for transmitting the first signal. This segmentation allows the remaining sub-bands to be used for first service data, maintaining resource efficiency while protecting the first signal from interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first sub-band is extracted from the first frequency domain resource specifically for the first signal transmission. This extraction isolates the critical signal from service data transmissions within the same frequency domain resource, reducing interference while maintaining overall resource efficiency.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4152708B1Communication method and communication device

Publication Date: 2024.05.15 HUAWEI TECH CO LTD

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AI summary

This application provides a communication method and an apparatus, applied to the field of self-driving, intelligent driving, or short-range communications. The method includes: determining a first signal; and transmitting the first signal in a first sub-band, where the first sub-band is included in a first frequency domain resource, the first frequency domain resource is used to transmit the first signal and first service data, the first frequency domain resource includes M sub-bands, and M is an integer greater than or equal to 1. In this way, resources for transmitting the first signal can be limited within one sub-band and does not exceed a boundary of the sub-band. This can avoid interference to transmission of the first signal.