SSB Type Signaling for RedCap and eMBB Resource Detection
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Solution Overview
Problem
Existing communication systems face challenges in efficiently managing synchronization signal blocks (SSBs) for diverse terminal devices, particularly in coexistence scenarios involving RedCap devices and high-end eMBB and URLLC devices, leading to inefficiencies in resource utilization and increased signaling overheads.
Innovation Solution
A method and apparatus that differentiate between non-cell-defining and cell-defining SSBs for different terminal devices, utilizing existing SSB fields to convey indication information, allowing devices to determine control-resource sets and common search spaces without additional SSB transmissions, thereby optimizing resource utilization and reducing overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate SSB transmissions are used for different terminal device types, then each device type can obtain dedicated synchronization information, but signaling overhead increases and resource utilization decreases
Solution Approach 1:
The patent makes the SSB structure universal by designing it to serve multiple terminal device types (RedCap and non-RedCap) simultaneously. The same SSB contains synchronization information that can be interpreted differently by different device types through type indication fields, eliminating the need for separate SSB transmissions for each device category and reducing signaling overhead while maintaining synchronization accuracy.
Solution Approach 2:
The patent changes the interpretation parameters of the SSB based on terminal device type. By introducing type indication fields and allowing different parsing rules for different device types, the same physical SSB structure can convey different logical information to different devices, achieving type-specific synchronization without type-specific transmissions.
2Adaptability or versatility
If type-specific SSB configurations are implemented, then each terminal device type receives optimized synchronization information, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by including type indication fields within the SSB structure itself. Terminal devices perform preliminary identification of their type and select the appropriate parsing rule before processing the synchronization information. This pre-established classification mechanism simplifies the processing logic compared to attempting to handle all device types with a single complex parsing algorithm.
3Productivity
If additional SSB transmissions are sent for different device types, then all devices can access network efficiently, but power consumption increases
Solution Approach 1:
The universal SSB structure allows all terminal device types to access the network using the same transmission resource. RedCap devices and non-RedCap devices can both obtain their synchronization information from the same SSB by interpreting it according to their respective types, eliminating the need for additional dedicated SSB transmissions and thereby reducing power consumption while maintaining network access efficiency.
Data Source
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AI summary
Embodiments of this application provide a synchronization signal block transmission method and a communication apparatus. The method includes: receiving a first synchronization signal block SSB from a network device, where the first SSB is a first-type SSB for a first terminal device; and if the first SSB is a second-type SSB for a second terminal device, determining a first control-resource set and/or first common search space based on the first SSB. In the method, different results may be obtained when the second terminal device and the first terminal device identify a type of the first SSB, and the second terminal device and the first terminal device may use the first SSB in different manners. For example, the second terminal device may determine the first control-resource set and/or the first common search space based on the first SSB, to improve utilization of the SSB.