PBCH and SSB Signaling with Fixed Offsets for Reduced-Capability UE
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently signaling physical broadcast channels (PBCH) and synchronization signal blocks (SSB) due to the complexity in determining the location of PBCH symbols relative to SSB symbols, particularly for reduced capability user equipment (UE) that may struggle with multiple hypotheses for PBCH symbol location.
Innovation Solution
The method involves receiving a synchronization signal block (SSB) burst set that includes a plurality of SSBs, where a majority of the SSBs have an SSB symbol and a corresponding physical broadcast channel (PBCH) symbol located a fixed number of symbols from the SSB symbol. This allows the user equipment (UE) to obtain the location of the PBCH symbol based on the fixed number of symbols, simplifying the process and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple hypotheses are used for PBCH symbol location determination, then the system maintains compatibility with existing wireless communication standards, but the complexity increases for reduced capability user equipment
Solution Approach 1:
The patent extracts the PBCH symbol location indication from the SSB burst set configuration, separating it as a distinct parameter. This allows reduced capability UE to obtain the location information directly without needing to evaluate multiple hypotheses, thereby reducing device complexity while maintaining standard compatibility
Solution Approach 2:
The network entity acts as an intermediary by providing the fixed number of symbols between SSB and PBCH symbols through signaling. This intermediary information bridge enables reduced capability UE to determine PBCH location without performing complex hypothesis testing, resolving the contradiction between standard compliance and device simplicity
2Device complexity
If the PBCH symbol location is determined using a fixed number of symbols from SSB symbol, then the complexity for user equipment is reduced, but the flexibility in signaling is limited
Solution Approach 1:
The patent introduces dynamic signaling mechanisms where the network entity can indicate different fixed symbol offsets through RRC signaling or other control channels. This allows the system to adapt the PBCH location configuration dynamically while maintaining the simplified fixed-offset approach for each specific configuration, balancing complexity reduction with signaling flexibility
Solution Approach 2:
The patent enables parameter changes by allowing the network to signal different values for the fixed number of symbols between SSB and PBCH. This parameter adaptability permits the system to optimize PBCH locations for different deployment scenarios while keeping the UE implementation simple, as UEs only need to follow the signaled parameter values without implementing complex search algorithms
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a synchronization signal block (SSB) burst set that includes a plurality of SSBs, a majority of the SSBs in the SSB burst set having an SSB symbol and a corresponding physical broadcast channel (PBCH) symbol that is located a fixed number of symbols from the SSB symbol. The UE may obtain a location of the PBCH symbol based at least in part on the fixed number of symbols. Numerous other aspects are described.