Sidelink Radar Comb Patterns for Joint Data Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently integrating radar and communication signals, leading to resource utilization inefficiencies and increased overhead, particularly in 5G NR systems.
Innovation Solution
The implementation of comb patterns for time and frequency resource allocation in sidelink communications, allowing for simultaneous radar and data channel transmissions, with non-contiguous time resource locations and configurable parameters to reserve resources for radar sensing, enhancing resource utilization and reducing communication overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar signals and data channel communications are transmitted simultaneously using the same time resources, then radar sensing capability is improved, but resource utilization efficiency deteriorates due to conflicts and interference
Solution Approach 1:
The patent divides time resources into discrete slots and applies comb patterns that allocate specific time slots for radar signals and other slots for data communications. This segmentation allows both functions to operate simultaneously without direct conflict, improving radar sensing capability while maintaining resource utilization efficiency through structured time division.
Solution Approach 2:
The comb pattern configuration is made dynamic and configurable, allowing the system to adjust the density and distribution of radar resource slots based on current sensing requirements and traffic conditions. This dynamic allocation optimizes both radar performance and communication efficiency under varying operational scenarios.
2Object-affected harmful factors
If comb patterns with non-contiguous time resource locations are used for radar signals, then interference management is improved, but device complexity increases due to pattern configuration and signaling
Solution Approach 1:
The patent employs periodic comb patterns where radar resource slots repeat at regular intervals defined by a comb factor. This periodic structure simplifies the configuration process compared to arbitrary non-contiguous patterns, as devices only need to store and apply the periodic rule rather than individual slot assignments, reducing complexity while maintaining interference management benefits.
Solution Approach 2:
The system uses configurable parameters such as comb factor and offset values to define the comb pattern. By changing these parameters, the system can adapt the pattern density and distribution to match interference conditions without redesigning the entire pattern structure. This parameter-based approach reduces configuration complexity while maintaining effective interference management.
3Measurement precision
If dedicated time resources are reserved for radar sensing, then radar resolution requirements are met, but communication data rate decreases due to reduced available resources
Solution Approach 1:
The patent applies comb patterns that allocate only a portion of time resources to radar signals, using sparse sampling rather than continuous transmission. This partial allocation provides sufficient radar resolution for many applications while preserving the majority of time resources for high-rate communications, achieving an optimal balance between radar performance and communication throughput.
Solution Approach 2:
The comb pattern structure serves multiple functions simultaneously: it provides radar sensing resources, maintains time synchronization between devices, and creates predictable interference patterns that can be managed through standard communication protocols. This multi-functionality reduces the need for separate dedicated resources for each function, preserving communication data rate while meeting radar resolution requirements.
Data Source
AI summary
Aspects described herein relate to obtaining an indication of a comb pattern including a collection of non-contiguous time resource locations for transmitting a radar signal that includes a data channel communication, and one of transmitting, using the comb pattern, the radar signal to one or more other UEs over sidelink shared channel resources, or receiving, using the comb pattern, the radar signal from one or more other UEs over the sidelink shared channel resources. Other aspects relate to configuring the UEs with the comb pattern.