Narrowband SCell SSB and CORESET Bandwidth Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring and identifying synchronization signal block (SSB) and control resource set (CORESET) bandwidths for secondary cells (SCells) with narrowband channel bandwidths, particularly less than 5 MHz, which hampers deployment and resource utilization in non-standalone scenarios.
Innovation Solution
The method involves a user equipment (UE) receiving configuration information associated with an SCell, which includes an SSB and an initial CORESET. The UE identifies the SSB and CORESET bandwidth configurations based on the configuration information, which may indicate the bandwidths or use a synchronization raster for cells with narrowband channel bandwidths, enabling flexible and efficient configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional SSB and CORESET bandwidth configurations are used for SCells, then compatibility with existing systems is maintained, but deployment flexibility and resource utilization for narrowband channels are limited
Solution Approach 1:
The patent introduces dynamic bandwidth configuration where the SSB and CORESET bandwidths can be flexibly adjusted based on the actual channel bandwidth of the SCell. The network node determines appropriate bandwidth configurations from a set of possible values and signals them to the UE, allowing the system to adapt to different narrowband channel conditions rather than being fixed to traditional configurations.
Solution Approach 2:
The patent changes the bandwidth parameter from fixed traditional values to variable configurations that match the actual channel bandwidth. By allowing the SSB and CORESET bandwidths to be selected from multiple possible values and adjusted based on channel conditions, the system achieves better resource utilization while maintaining compatibility through standardized signaling mechanisms.
2Quantity of substance
If narrowband channel bandwidths are deployed for SCells, then resource utilization is improved, but identification and configuration of SSB and CORESET bandwidths becomes difficult
Solution Approach 1:
The network node determines the appropriate SSB and CORESET bandwidth configurations based on the actual channel bandwidth of the SCell and signals these configurations to the UE. This feedback mechanism ensures that the UE correctly identifies and uses the appropriate bandwidth for SSB and CORESET, eliminating ambiguity in narrowband deployments.
Solution Approach 2:
The patent introduces an intermediary configuration signaling mechanism where the network node explicitly indicates the SSB and CORESET bandwidth configurations to the UE. This intermediary signaling layer resolves the difficulty of bandwidth identification by providing clear, standardized information about which bandwidth configuration to use for SSB and CORESET on narrowband channels.
3Manufacturing precision
If explicit bandwidth configuration signaling is used for SSB and CORESET, then configuration precision is improved, but signaling overhead increases
Solution Approach 1:
Instead of always using full explicit bandwidth configuration signaling, the patent applies partial signaling where the network node provides bandwidth configuration information only when necessary for narrowband channels. The UE uses predefined associations between channel bandwidth and SSB/CORESET bandwidth configurations, so explicit signaling is used selectively rather than universally, reducing overall overhead while maintaining precision where needed.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information associated with a secondary cell (SCell), wherein the SCell has a narrowband channel bandwidth. The UE may receive a synchronization signal block (SSB) on the SCell in accordance with an SSB bandwidth configuration, wherein the SSB bandwidth configuration is associated with at least one of: the configuration information, or a frequency of the SSB being identified by a synchronization raster, wherein the synchronization raster is for cells having the narrowband channel bandwidth. The UE may monitor an initial control resource set (CORESET) using a CORESET bandwidth configuration associated with the configuration information. Numerous other aspects are described.