Spatial-Domain Sensing Beam Coordination for Inter-Cell Interference
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Solution Overview
Problem
Inter-cell interference poses significant challenges in joint communication and sensing systems, particularly affecting the performance of radar sensing due to strong interference from other cells' signals, which existing interference handling methods are inadequate to address.
Innovation Solution
Implement spatial-domain interference mitigation techniques by calculating and managing the interference field of view (FoV) for sensing beams, coordinating beam directions, and using spatial orthogonality to separate signals between cells, combined with time, frequency, and code domain separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spatial-domain interference mitigation techniques are implemented by calculating and managing interference field of view (FoV) for sensing beams, then sensing performance is improved, but device complexity increases
Solution Approach 1:
The patent calculates and determines the interference field of view (FoV) for sensing beams in advance before actual sensing operations. By pre-computing the spatial regions where interference may occur and coordinating beam directions beforehand, the system establishes spatial orthogonality between cells ahead of time. This preliminary action enables sensing operations to proceed with reduced interference without requiring complex real-time interference mitigation processing during actual sensing execution.
2Object-affected harmful factors
If spatial orthogonality is used to separate signals between cells, then inter-cell interference is reduced, but system complexity increases due to coordination requirements
Solution Approach 1:
The patent introduces spatial domain as an additional dimension for signal separation beyond traditional time and frequency domains. By calculating interference FoV and coordinating beam directions in the spatial dimension, the system creates spatial orthogonality between cells. This allows signals from different cells to be separated based on their spatial characteristics and arrival angles, reducing inter-cell interference while utilizing the unused spatial resource dimension rather than requiring more time or frequency resources.
3Reliability
If beam directions are coordinated between cells, then sensing effectiveness is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies different beam directions and spatial configurations to different cells based on their specific interference environments and sensing requirements. By calculating the interference FoV for each cell individually and coordinating beam directions locally for each cell pair, the system optimizes sensing effectiveness for each local scenario. This localized approach to beam coordination allows each cell to adapt its spatial resources to its specific needs rather than applying a uniform resource allocation scheme across the entire network.
Data Source
AI summary
An apparatus can include transceiver circuitry to generate at least one sensing transmit beam. The apparatus can include a processor coupled to the transceiver circuitry to determine an interference field of view (FoV) of the at least one sensing transmit beam and receive a time or frequency resource allocation for subsequent transmissions based on the interference FoV information.