SSB Resource Indication Segmentation for NR-U Signaling Overhead
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Solution Overview
Problem
In the NR-U scenario, the existing methods for indicating the transmission location of Synchronization Signal Blocks (SSBs) result in high signaling overhead, especially during initial access, due to the larger number of candidate transmission locations and the limitations imposed by Listen Before Talk (LBT) failures.
Innovation Solution
A method and device that reduce signaling overhead by providing indication information to terminal devices about the resource location of target SSBs, including the number of candidate SSBs between adjacent SSBs and the specific resource location of the first target SSB, using fewer bits to efficiently determine transmission locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a larger full bitmap is used to indicate SSB transmission locations in NR-U, then the number of candidate transmission locations can be increased to cope with LBT failures, but the signaling overhead increases significantly
Solution Approach 1:
The patent segments the bitmap indication into two parts: a first bitmap indicating a first number of candidate SSB transmission locations, and a second bitmap indicating a second number of candidate SSB transmission locations. This segmentation allows the system to indicate a larger total number of candidate locations (improving adaptability) while keeping each individual bitmap smaller (reducing signaling overhead per bitmap). The terminal device can process these segmented bitmaps efficiently to determine the actual transmission locations of SSBs.
2Reliability
If more candidate SSB transmission locations are configured, then the system can better handle LBT failures, but the resource overhead for indicating these locations increases
Solution Approach 1:
The patent employs dynamic indication by using multiple bitmaps that can be selectively activated or deactivated based on actual transmission needs. The network device can dynamically adjust which bitmaps are used to indicate candidate SSB transmission locations, allowing flexible adaptation to LBT failure scenarios without permanently allocating excessive resources. This dynamic approach enables the system to maintain reliability for handling LBT failures while optimizing resource overhead by only indicating necessary candidate locations in each scenario.
Data Source
AI summary
A method and device for receiving information and transmitting information. The method includes a terminal device receiving indication information. The indication information indicates at least one of the following information for at least one target synchronization signal block (SSB): the at least one target SSB being a plurality of target SSBs, a number of candidate SSBs located in an interval between two adjacent target SSBs in the plurality of target SSBs; a number of the at least one target SSB; or a resource location of a first target SSB of the at least one target SSB.