Radio-Frequency Sensing Assistance Data for Multi-Target Association
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately tracking multiple target objects due to the lack of effective assistance data for data association, leading to inefficiencies in sensing and tracking processes.
Innovation Solution
A method and system that provides assistance data for wireless sensing nodes to associate sensing measurements with target objects, using data association information to improve the tracking of multiple targets by exchanging assistance data and measurements in multiple iterations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless sensing nodes perform sensing measurements of reference signals reflected from multiple target objects, then the sensing capability is improved, but the difficulty of detecting and measuring increases due to the lack of data association information for distinguishing between multiple targets
Solution Approach 1:
The patent applies preliminary action by having a sensing entity pre-generate and provide assistance data to sensing nodes before the actual sensing process. This assistance data includes information about multiple target objects that enables sensing nodes to correctly associate measurements with specific targets, resolving the target association difficulty before it arises during measurement operations
Solution Approach 2:
The patent introduces an intermediary element - the assistance data generated by the sensing entity and transmitted to sensing nodes. This intermediary data structure acts as a mediator that bridges the gap between raw sensing measurements and target identification, enabling accurate target association without requiring complex processing at the sensing node level
2Measurement precision
If assistance data is provided to sensing nodes for multi-target data association, then the target distinction capability is improved, but the device complexity increases due to the need for data exchange and processing between sensing entities and sensing nodes
Solution Approach 1:
The patent applies the taking out principle by extracting the complex data association processing function from the sensing nodes and concentrating it in a dedicated sensing entity. The sensing entity generates and manages the assistance data, while sensing nodes simply receive and use this pre-processed information, thereby reducing the complexity burden on individual sensing nodes
Solution Approach 2:
The sensing entity serves multiple functions: it performs sensing measurements, generates assistance data, manages target information, and provides data association support to multiple sensing nodes. This multi-functionality consolidates complexity in a single entity rather than distributing it across multiple nodes, simplifying the overall system architecture
Data Source
AI summary
Disclosed are techniques for wireless sensing. In an aspect, a receiver sensing node receives, from a sensing entity, assistance data for sensing a set of target objects, wherein the assistance data includes data association (DA) information for each target object of the set of target objects, obtains a plurality of sensing measurements of one or more sensing reference signals transmitted by a transmitter sensing node and reflected from at least a subset of target objects of the set of target objects, and assigns one or more sensing measurements of the plurality of sensing measurements to each target object in the subset of target objects.