Shared Reference Signals for Joint Communication and Sensing Slots
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in resource utilization due to separate slots for sensing and communication, with sensing and communication reference signals having different structures and functionalities, leading to suboptimal resource allocation and accuracy in joint communication and sensing operations.
Innovation Solution
The proposed systems and techniques utilize shared signal resources and reference signals for both sensing and communication, allowing for efficient resource allocation and demodulation, including the use of sensing reference signals for demodulating shared channel signals like PDSCH, to enhance resource utilization in joint communication and sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate slots are used for sensing and communication, then resource allocation is simplified, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent combines separate sensing slots and communication slots into a unified slot structure where both sensing reference signals and communication data can coexist. This merging allows the system to maintain the simplicity of separate allocation while achieving improved resource utilization through shared time-frequency resources.
Solution Approach 2:
The patent creates a multi-functional slot that can simultaneously serve sensing and communication purposes. By designing reference signals that can function for both sensing operations and communication demodulation, the system achieves higher resource utilization without significantly increasing allocation complexity.
2Reliability
If separate reference signals are used for sensing and communication, then signal functionality is optimized, but resource overhead increases
Solution Approach 1:
The patent designs reference signals that serve dual purposes: they function as sensing reference signals for radar sensing operations and simultaneously serve as demodulation reference signals for communication data. This multi-functionality reduces the total number of reference signals needed while maintaining both sensing accuracy and communication reliability.
Solution Approach 2:
The patent merges the functionality of separate sensing reference signals and communication demodulation reference signals into a unified reference signal structure. This combination reduces resource overhead by eliminating redundant reference signals while preserving the distinct functional requirements of both sensing and communication operations.
3Measurement precision
If dedicated sensing slots are allocated, then sensing accuracy is improved, but communication resource availability deteriorates
Solution Approach 1:
The patent applies local quality by allocating specific resource elements within a slot for sensing reference signals while other resource elements remain available for communication data. This localized allocation ensures sensing accuracy in designated resources while preserving communication resource availability in other portions of the same slot.
Solution Approach 2:
The patent transitions from time-domain separation (dedicated sensing slots) to frequency-domain multiplexing within the same time slot. By utilizing different frequency resources (resource elements) within a slot for sensing and communication, the system maintains sensing accuracy while improving communication resource availability through dimensional resource allocation.
Data Source
AI summary
Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, an example of a process includes receiving a signal comprising a slot including at least one shared signal resource. The process further includes determining whether the slot is allocated for sensing and communications or is allocated for communications. The process further includes determining whether to demodulate the at least one shared signal resource using at least one sensing reference signal (RS) resource or at least one communication RS based whether the slot is allocated for sensing and communications or is allocated for communications.