Sidelink CSI-RS Multiplexing for Low-Latency Reliable PSSCH
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently supporting low latency and high reliability requirements for sidelink communications, particularly in scenarios like vehicle-to-everything (V2X) applications, where flexible design and enhanced coverage are necessary to meet increasing mobile broadband access demands.
Innovation Solution
The implementation of advanced NR sidelink communication systems that utilize multiplexing techniques for sidelink channels, including PSCCH/PSSCH/PSFCH, with optimized resource allocation and channel state information (CSI) reporting, enabling efficient resource utilization and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wireless communication systems are used for sidelink communications, then device compatibility is maintained, but latency requirements and reliability for V2X applications cannot be met
Solution Approach 1:
The patent applies parameter changes by modifying physical layer parameters including subcarrier spacing, cyclic prefix lengths, and slot structures to optimize communication for low-latency V2X applications. These parameter adjustments enable the system to meet stringent latency and reliability requirements while maintaining compatibility with existing NR infrastructure.
Solution Approach 2:
The patent implements dynamic resource allocation and flexible frame structures that can adapt transmission parameters in real-time based on channel conditions and service requirements. This dynamic approach allows the system to optimize for low latency when needed while maintaining robustness for reliable communication.
2Loss of time
If resource allocation is optimized for low latency, then latency requirements are met, but resource utilization efficiency decreases
Solution Approach 1:
The patent segments resources into different pools with distinct allocation strategies - some resources are pre-configured for low-latency transmissions while others are dynamically allocated for efficient resource utilization. This segmentation allows the system to meet latency requirements for critical communications while maintaining overall resource efficiency.
Solution Approach 2:
The patent employs partial resource reservation where only the necessary portion of resources is allocated for low-latency transmissions rather than over-provisioning. This approach ensures latency requirements are met while avoiding waste of spectral resources that would reduce overall system productivity.
3Adaptability or versatility
If flexible design is implemented to support diverse services, then adaptability increases, but system complexity increases
Solution Approach 1:
The patent implements a universal frame structure and resource allocation mechanism that can support multiple services including V2X, enhanced mobile broadband, and mission-critical communications through configurable parameters. This multi-functional design provides service diversity while avoiding the complexity of separate dedicated systems for each service type.
Solution Approach 2:
The patent uses parameter-based service differentiation where diverse services are supported by adjusting transmission parameters such as subcarrier spacing, cyclic prefix type, and resource allocation patterns rather than requiring fundamentally different system architectures. This approach maintains system simplicity while achieving high adaptability.
Data Source
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AI summary
Aspects of the disclosure relate to a user equipment (UE) for establishing a sidelink communication channel with a wireless network and perform time resource allocation of channel- state information reference signals (CSI-RS), as well as collision handling. The UE may receive a physical sidelink shared channel (PSSCH) signal via the sidelink communication, where the PSSCH includes one or more interlaced physical resource blocks. The UE may process time-division multiplexed CSI-RS in one or more resource blocks for triggering the PSSCH signal.