Cooperative Sensing Node Roles for Low-Overhead ISAC

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Solution Overview

Problem

Mobile communication systems face challenges in understanding their environment to optimize signal transmission and reception, particularly when obstacles interfere with direct propagation paths, necessitating improved sensing technologies for effective communication.

Innovation Solution

The system employs cooperative sensing by categorizing communication nodes into sensing transceiving, active, and cooperative sets, using automatic gain control symbols and orthogonal resources to facilitate selective reporting and reduce air interface overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If all communication nodes perform cooperative sensing, then sensing accuracy is improved, but air interface overhead increases

Engineering Contradiction:

Improvesensing accuracyVSAvoidair interface overhead

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent segments communication nodes into different sets (sensing transceiving set, sensing active set, sensing cooperative set) with distinct roles. Not all nodes perform full sensing operations - only designated nodes transmit sensing signals while others receive and report selectively, reducing overall system overhead while maintaining sensing functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial action by having only a subset of nodes perform sensing signal transmission rather than all nodes participating fully. The system achieves adequate sensing coverage through strategic selection of active sensing nodes, avoiding the excessive action of having every node transmit sensing signals simultaneously.

Inventive Principle:

Principle #16Partial or excessive action

2Area of stationary object

If multiple sensing nodes transmit sensing signals simultaneously, then sensing coverage is improved, but signal collision increases

Engineering Contradiction:

Improvesensing coverageVSAvoidsignal collision

Core Design Contradiction:

Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent divides sensing nodes into multiple sets that operate in a coordinated manner. The sensing transceiving set nodes transmit sensing signals at different times or on different resources, segmenting the transmission process to avoid collisions while maintaining comprehensive coverage through the combined effort of all sets.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary coordination to assign transmission opportunities and resources to different sensing nodes before actual signal transmission. This preliminary action prevents signal collisions by ensuring that multiple nodes do not transmit simultaneously on the same resources, while still achieving broad coverage through planned multi-node participation.

Inventive Principle:

Principle #10Preliminary action

3Speed

If sensing nodes report measurement results continuously, then sensing real-time performance is improved, but air interface overhead increases

Engineering Contradiction:

Improvesensing real-time performanceVSAvoidair interface overhead

Core Design Contradiction:

SpeedVSLoss of energy

Solution Approach 1:

The patent implements feedback mechanisms where sensing nodes report measurement results based on triggers or when changes are detected, rather than continuous reporting. The feedback is selective and event-driven, maintaining real-time sensing capability while significantly reducing air interface overhead compared to continuous reporting approaches.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system uses periodic or event-triggered reporting rather than continuous reporting. Sensing nodes report measurement results at predetermined intervals or when specific conditions are met, achieving real-time sensing performance requirements while minimizing air interface overhead through spaced-out reporting occasions.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20250358597A1Communication systems, apparatuses, methods, and non-transitory computer-readable storage devices for integrated sensing and communication using cooperative sensing

Publication Date: 2025.11.20 HUAWEI TECH CO LTD

AI summary

Communication systems, apparatuses, methods, and one or more non-transitory computer-readable storage devices for cooperative sensing in integrated communication and sensing employs the steps of: determining a type of a first communication node for object sensing, and notifying the first communication node the determined type. Said determining the type of the first communication node has the steps of: determining the type of the first communication node as a sensing transceiving node in a sensing transceiving set to receive or transmit a sensing signal for object sensing, or determining the type of the first communication node as a sensing active node in a sensing active set, the sensing active set comprising the sensing transceiving set.