Sidelink Discovery Burst Window for Beam Pair Reliability
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Solution Overview
Problem
Existing methods for sidelink synchronization signal block (S-SSB) transmissions in wireless communications are deficient, leading to reduced reliability in beam pair selection for sidelink communications.
Innovation Solution
The implementation of a discovery burst transmission window that configures user equipment (UE) with a sidelink discovery burst window for performing sidelink synchronization signal transmissions, allowing multiple channel access procedure attempts per beam based on a quasi co-location relationship between associated pairs of sidelink synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single channel access procedure is performed for each beam, then the channel access complexity is reduced, but the reliability of beam pair selection deteriorates
Solution Approach 1:
The discovery burst transmission window is segmented into multiple time periods, each containing multiple candidate starting positions for channel access procedures. This segmentation allows multiple independent attempts to access the channel for the same beam, thereby improving reliability without requiring a single complex procedure to handle all possibilities.
Solution Approach 2:
The configuration is prepared in advance with multiple candidate starting positions and time periods predetermined. This preliminary arrangement of multiple opportunities for channel access procedures enables the UE to systematically attempt beam pair selection multiple times within the discovery burst window, improving selection reliability before actual transmission occurs.
2Reliability
If multiple channel access procedure attempts are performed per beam, then the reliability of beam pair selection is improved, but the time required for discovery procedures increases
Solution Approach 1:
Multiple channel access procedure attempts for different beams are merged into a single discovery burst transmission window structure. This combining allows the UE to perform multiple attempts in parallel or sequential fashion within one consolidated time window, improving reliability while limiting the overall time expenditure to a bounded period rather than allowing unlimited sequential attempts.
Solution Approach 2:
The discovery burst transmission window operates on a periodic basis with configured time periods and patterns. This periodic structure enables multiple channel access attempts to be distributed across repeated cycles, allowing the system to achieve high reliability through multiple attempts while maintaining time efficiency through periodic repetition rather than continuous operation.
3Adaptability or versatility
If a fixed transmission pattern is used for sidelink synchronization signals, then the device complexity is reduced, but the adaptability to different quasi co-location relationships deteriorates
Solution Approach 1:
The transmission pattern is made dynamic rather than fixed, allowing the UE to adapt the timing and positioning of channel access procedures based on the specific quasi co-location relationships detected between beams. This dynamic adjustment capability enables the system to handle different spatial relationships between synchronized signals while maintaining manageable complexity through algorithmic adaptation rather than multiple fixed patterns.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first UE may receive a message indicating a configuration or a sidelink discovery burst transmission window. The configuration may include time periods for transmitting multiple sidelink synchronization signals. The first UE may perform a channel access procedure during the sidelink discovery burst transmission window. The first UE may perform the channel access procedure for transmitting one or more of the sidelink synchronization signals according to a pattern indicated by the configuration. The pattern may be based on a quasi co-location relationship between associated pairs of the sidelink synchronization signals. The first UE may transmit the one or more sidelink synchronization signals to a second UE in accordance with the pattern indicated by the configuration.