Secondary Carrier Paging for Single- and Multi-SIM Reliability
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Solution Overview
Problem
Single-SIM and multi-SIM devices experience poor paging performance in poor radio frequency conditions due to interference on the primary component carrier, leading to missed pages, especially when RF resources are shared between different SIMs or when the primary carrier does not include a paging search space.
Innovation Solution
Utilizing a secondary component carrier (SCC) to decode pages, especially when channel conditions on the primary component carrier (PCC) are poor or when the bandwidth part of the PCC does not overlap with the paging search space, allowing for improved paging reliability and reduced power consumption by avoiding tune-aways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary component carrier (PCC) is used for paging decoding, then the paging performance is degraded due to interference and poor RF conditions, but switching to secondary component carrier (SCC) requires additional complexity in carrier selection and configuration
Solution Approach 1:
The patent changes the parameter of carrier selection from static (always using PCC) to dynamic (selecting between PCC and SCC based on configuration and conditions). The UE detects whether SCells are configured for connected mode operation and uses this configuration information to determine whether to use SCC for paging decoding, thereby adapting to different RF conditions and resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent introduces dynamic carrier selection for paging operations. The UE can switch between using PCC and SCC for paging decoding based on whether SCells are configured for connected mode. This dynamic approach allows the system to optimize paging reliability by using SCC when configured, while the complexity is managed through standardized detection procedures defined in the patent.
2Reliability
If the UE tunes away from the primary cell to decode pages on secondary cells, then paging reliability is improved, but power consumption increases and data call rates may be reduced
Solution Approach 1:
The patent applies preliminary action by pre-configuring SCells for connected mode operation before paging occasions occur. When SCells are configured, the UE can use them for paging decoding without needing to perform tune-aways from the PCC. This advance configuration eliminates the need for power-consuming carrier switching while maintaining the ability to decode pages reliably on SCC when appropriate.
Solution Approach 2:
The patent enables continuous operation on the PCC for data calls while simultaneously using configured SCCs for paging decoding. Instead of interrupting data calls to tune away for paging, the UE can maintain continuous data transmission on PCC and continuously monitor SCC for paging messages, thereby eliminating power consumption associated with tune-aways while maintaining both data call performance and paging reliability.
3Reliability
If SCells are configured for connected mode operation, then paging can be decoded on SCC improving reliability, but the device complexity and processing requirements increase
Solution Approach 1:
The patent applies local quality by using SCC specifically for paging decoding while keeping PCC for data calls. Each carrier has a specialized function: PCC handles data traffic and SCC handles paging messages. This division allows the UE to process paging on SCC without full processing overhead for both carriers simultaneously, reducing overall processing complexity while improving paging reliability through dedicated resource usage.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for merging pages in communications systems using carrier aggregation (CA) or secondary component carriers (SCCs). An example method that may be performed by a user equipment (UE) includes: operating in a connected mode using a default data subscription (DDS) associated with a primary cell (PCell); detecting one or more secondary cells (SCells) associated with the DDS are configured for operating in the connected mode; and decoding one or more paging messages using at least a secondary component carrier (SCC) associated with a first SCell of the one or more SCells.