Flexible Sidelink Transmission Starts for Shared-Spectrum Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing shared spectrum channel access for sidelink transmissions, particularly in scenarios requiring non-contiguous sub-channel resource pools to meet regulatory requirements for occupied channel bandwidth and power spectral density.
Innovation Solution
The implementation of flexible starting locations for sidelink transmissions and non-contiguous sub-channel based resource pools, allowing for dynamic channel access and compliance with shared spectrum regulations by configuring orthogonal frequency-division multiplexing (OFDM) symbols and performing channel access procedures to initiate transmissions from specific symbols within a slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sidelink transmissions use fixed starting locations in shared spectrum channels, then channel access procedures are simplified, but spectrum utilization efficiency and adaptability to regulatory requirements deteriorate
Solution Approach 1:
The patent implements dynamic starting symbol selection for sidelink transmissions by introducing a configurable parameter that allows the starting OFDM symbol to vary based on channel access outcomes and regulatory requirements. This transforms the fixed starting location into a flexible, adaptive parameter that can be adjusted in real-time to optimize spectrum utilization while maintaining compliant channel access procedures
Solution Approach 2:
The patent changes the parameter of transmission starting location from a fixed value to a variable that can be dynamically selected from multiple possible OFDM symbols within a slot. This parameter change enables the system to adapt to different regulatory requirements for occupied channel bandwidth and power spectral density while maintaining efficient channel access procedures
2Reliability
If non-contiguous sub-channel resource pools are implemented, then compliance with regulatory requirements for occupied channel bandwidth and power spectral density is improved, but system complexity and resource allocation overhead increase
Solution Approach 1:
The patent divides the frequency spectrum into multiple sub-channels that can be configured as contiguous or non-contiguous resource pools. This segmentation allows the system to meet regulatory requirements for occupied channel bandwidth and power spectral density by selectively allocating non-contiguous sub-channels, while the standardized resource pool structure keeps configuration complexity manageable
Solution Approach 2:
The patent creates a universal resource pool configuration framework that can accommodate both contiguous and non-contiguous sub-channel allocations. This multi-functional approach allows the same resource pool structure to serve different regulatory requirements and service types, reducing overall system complexity through standardized procedures
3Productivity
If flexible starting locations for sidelink transmissions are allowed, then spectrum utilization efficiency and communication capacity are improved, but timing synchronization and resource allocation complexity increase
Solution Approach 1:
The patent applies different starting symbol configurations to different sidelink transmission scenarios based on local requirements. By allowing flexible starting locations only where needed while maintaining fixed structures elsewhere, the system improves spectrum utilization efficiency without unnecessarily increasing overall resource allocation complexity
Data Source
AI summary
Methods and apparatuses for use of flexible starting locations for SL transmissions in a wireless communication system. A method of user equipment (UE) in a wireless communication system operating with a shared spectrum channel access includes determining a set of multiple orthogonal frequency-division multiplexing (OFDM) symbols in a slot and performing a channel access procedure over a channel. The method further includes transmitting a sidelink transmission over the channel, starting from an OFDM symbol within the set of multiple OFDM symbols in the slot, upon successfully performing the channel access procedure before the OFDM symbol. The set of multiple OFDM symbols in the slot may be determined based on a higher layer configuration or pre-configurations.