Cross-slot Paging Configuration for 5G UE Power Optimization
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Solution Overview
Problem
User equipment (UE) in 5G NR networks wastes power and processing resources by monitoring and decoding Physical Downlink Shared Channel (PDSCH) slots that do not contain relevant paging information, as current paging mechanisms do not allow for efficient skipping of unnecessary PDSCH monitoring.
Innovation Solution
Implementing a cross-slot paging schedule that includes a minimum gap (N) between the reception of paging downlink control information (DCI) and the processing of PDSCH, allowing the UE to skip PDSCH operations when no relevant paging information is indicated by the DCI, thereby optimizing power and processing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors and decodes PDSCH slots according to current paging mechanisms, then the UE can receive paging information, but the UE wastes power and processing resources by monitoring PDSCH slots that do not contain relevant paging information
Solution Approach 1:
The network transmits DCI on PDCCH before the actual PDSCH transmission to indicate whether paging information is present. The UE processes this preliminary DCI information to determine if it needs to monitor and decode the subsequent PDSCH slot, thereby avoiding unnecessary power consumption while ensuring reliable paging reception when needed
Solution Approach 2:
The paging indication information is extracted and transmitted separately in the DCI on PDCCH, independent of the actual paging data on PDSCH. This allows the UE to check for paging relevance without fully processing the PDSCH, separating the indication function from the data transmission function to reduce unnecessary processing
2Reliability
If the UE monitors and decodes PDSCH slots according to current paging mechanisms, then the UE can receive paging information, but the UE wastes processing resources by decoding unnecessary PDSCH content
Solution Approach 1:
The network provides preliminary indication through DCI on PDCCH before PDSCH transmission. The UE uses this advance information to determine whether to proceed with PDSCH decoding, thereby avoiding unnecessary processing complexity while maintaining reliable paging reception when information is actually present
Solution Approach 2:
The paging indication is extracted into a separate DCI message on PDCCH, allowing the UE to evaluate paging relevance independently of the PDSCH content. This separation reduces processing overhead by enabling the UE to skip PDSCH decoding when no paging information is indicated
3Ease of operation
If the network transmits paging DCI with scheduling information for PDSCH, then the UE can identify relevant paging information, but the network requires additional configuration and transmission overhead
Solution Approach 1:
The DCI format on PDCCH is designed to serve multiple functions: it provides both scheduling information for PDSCH and paging indication information. This multi-functionality allows the existing DCI structure to enable UE skipping of unnecessary PDSCH monitoring without requiring separate dedicated signaling, thereby reducing configuration complexity while improving ease of operation
Data Source
AI summary
A network configures and transmits paging information. The network transmits configuration information to a user equipment (UE) operating in the network, wherein the configuration information comprises a value N based on a minimum gap between reception of a paging downlink control information (DCI) by the UE and fully processing the paging DCI by the UE, configures a paging DCI to be transmitted to the UE on a Physical Downlink Control Channel (PDCCH), wherein the paging DCI includes scheduling information for a Physical Downlink Shared Channel (PDSCH) and transmits the paging DCI to the UE on the PDCCH.