SSB Configuration for Undefined Cells in NR-U LBT Scenarios
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Solution Overview
Problem
Existing mobile communication technologies lack flexibility in configuring SSBs for undefined cells, particularly in scenarios involving different LBT schemes such as beam-based and omnidirectional reception.
Innovation Solution
A method and apparatus for configuring SSBs of undefined cells by providing configuration information to terminal devices, allowing them to switch between two SSB patterns: one for beam-based LBT reception and another for omnidirectional LBT reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed configuration of SSB is used for undefined cells, then cell search process is simplified, but flexibility in different LBT scenarios is lost
Solution Approach 1:
The patent applies dynamics by making the SSB configuration adaptable rather than fixed. The network device can dynamically select and indicate different SSB patterns (first pattern for beam-based LBT, second pattern for omnidirectional LBT) based on the actual reception scenario, allowing the system to transition between different operational states as needed.
Solution Approach 2:
The patent changes the configuration parameters of SSB based on different LBT scenarios. By introducing multiple SSB patterns with different time-domain positions and indicating the appropriate pattern through configuration information, the system adjusts its operational parameters to match the specific LBT reception scenario (beam-based or omnidirectional).
2Device complexity
If single SSB pattern is used, then device complexity is reduced, but measurement precision in different LBT scenarios deteriorates
Solution Approach 1:
The patent applies local quality by providing different SSB patterns optimized for specific local conditions (LBT scenarios). The first SSB pattern is designed specifically for beam-based LBT reception, while the second pattern is designed for omnidirectional LBT reception, ensuring that the appropriate pattern is used for each specific scenario to maximize reception accuracy.
3Ease of manufacture
If SSB configuration is fixed, then implementation is simplified, but adaptability to beam-based and omnidirectional LBT scenarios is reduced
Solution Approach 1:
The patent segments the SSB configuration into multiple distinct patterns (first SSB pattern and second SSB pattern), each optimized for a specific LBT scenario. This segmentation allows the system to maintain simple, well-defined configurations for each scenario while providing the ability to switch between them through configuration information indication.
Data Source
AI summary
The disclosure provides a method for configuring a synchronization signal and physical broadcast channel block (SSB). A terminal device obtains configuration information of an SSB of an undefined cell. The configuration information is used to configure at least one of two SSB patterns. The two SSB patterns includes a first SSB pattern and a second SSB pattern. The first SSB pattern is applicable to a beam-based listen before talk (LBT) reception scenario and the second SSB pattern is applicable to an omnidirectional LBT reception scenario.