Sidelink Subchannel Selection for S-SSB Coexistence
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in transmitting sidelink signals efficiently on resources frequency division multiplexed with a sidelink synchronization signal block (S-SSB), where the user equipment (UE) needs to select appropriate subchannels to ensure reliable and low-latency data transmission while maintaining synchronization signal performance.
Innovation Solution
The UE selects subchannels for transmitting physical sidelink shared channels (PSSCH) or physical sidelink control channels (PSCCH) based on priority, target reliability, latency requirements, quality of service (QoS), or synchronization signal block (SSB) measurements, and can receive notifications or configurations from the network regarding available resources and thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits sidelink signals on resources FDMed with S-SSB, then data transmission efficiency is improved, but S-SSB reception performance may deteriorate
Solution Approach 1:
The patent applies local quality by allowing sidelink signal transmission only in specific frequency resources that are FDMed with S-SSB, while keeping other frequency resources dedicated to S-SSB transmission. This selective approach enables data transmission in certain subchannels without interfering with S-SSB reception in protected frequency regions.
Solution Approach 2:
The frequency spectrum is segmented into different resource regions: some subchannels are allocated for S-SSB transmission while others are available for sidelink data transmission. This segmentation allows simultaneous operation of synchronization signals and data traffic without mutual interference.
2Loss of time
If the UE selects subchannels from resources FDMed with S-SSB, then latency requirement is reduced, but S-SSB measurement accuracy may worsen
Solution Approach 1:
The patent designates specific frequency subchannels as protected regions where S-SSB measurements can be performed without interference from sidelink transmissions. Other subchannels are allocated for low-latency data transmission, achieving both fast communication and accurate synchronization.
3Reliability
If the UE transmits with high priority or high reliability requirements, then QoS is improved, but interference to S-SSB may increase
Solution Approach 1:
The patent implements frequency-domain isolation by restricting high-priority sidelink transmissions to specific subchannels that do not overlap with S-SSB frequency resources. This ensures that even high-power transmissions for urgent data do not interfere with synchronization signal measurements.
Data Source
AI summary
One embodiment relates to a method for transmitting a sidelink signal by a terminal in a wireless communication system, the method comprising: a step of selecting one or more subchannels for physical sidelink shared channel (PSSCH) or physical sidelink control channel (PSCCH) transmission; and a step of transmitting the PSSCH or the PSCCH through the one or more subchannels, wherein the terminal selects the subchannel from a sidelink synchronization signal block (S-SSB) and a frequency division multiplexing (FDM) resource, on the basis of at least one of a priority of a threshold or higher, a target reliability of a threshold or higher, a latency requirement of a threshold or lower, a QoS requirement of a threshold or higher, and an SSB measurement value of a threshold or higher.