Unified PDCCH and RS Paging Early Indication Design
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in paging early indication (PEI) for user equipment (UE) in idle/inactive states, leading to unnecessary energy consumption due to frequent wake-ups for monitoring PDCCH, as existing solutions either rely heavily on PDCCH-based designs for large information transfer or RS-based designs for low overhead, but lack a unified approach to efficiently manage UE behavior in both cases.
Innovation Solution
A unified design for PDCCH and RS-based paging early indication is proposed, where a UE is configured to receive a DCI format with a TRS availability indication field, allowing it to determine TRS resource sets and adjust its DRX operation, enabling efficient monitoring by indicating whether to monitor or skip PDCCH occasions based on PEI, and utilizing RS resources for synchronization and low-overhead indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If PDCCH-based designs are used for large information transfer, then information transfer capability is improved, but energy consumption increases due to frequent wake-ups for monitoring
Solution Approach 1:
The indication information is segmented into two parts: a first indication information (PEI) transmitted via RS-based approach for basic wake-up indication, and a second indication information transmitted via PDCCH for detailed information transfer. This segmentation allows the UE to first check the low-overhead RS-based indication, and only wake up for PDCCH monitoring when necessary, thereby reducing energy consumption while maintaining information transfer capability.
Solution Approach 2:
The system uses partial action by implementing a two-stage indication mechanism where the full PDCCH monitoring is not always required. The RS-based PEI provides partial indication information that can satisfy basic paging needs, and the PDCCH provides additional information only when the PEI indicates it is necessary, avoiding excessive monitoring and reducing energy consumption.
2Quantity of substance
If RS-based designs are used for low overhead, then signaling overhead is reduced, but information transfer capability is limited
Solution Approach 1:
The invention merges RS-based PEI and PDCCH-based indication into a unified two-stage mechanism. The RS-based PEI carries basic indication information with low overhead, while the PDCCH carries supplementary detailed information when needed. This combination allows the system to maintain low signaling overhead for normal operations while preserving full information transfer capability when required.
Solution Approach 2:
The RS-based PEI acts as an intermediary between the network and the UE, providing a lightweight first-stage indication that filters out cases where full PDCCH monitoring is unnecessary. This intermediary mechanism reduces the frequency of full PDCCH monitoring while ensuring that no paging information is missed, effectively bridging the gap between low overhead and complete information transfer.
3Productivity
If unified design is implemented, then system efficiency is improved, but device complexity increases
Solution Approach 1:
The unified design implements dynamic behavior where the UE adapts its monitoring behavior based on the PEI content. When PEI indicates no paging, the UE skips PDCCH monitoring (low complexity mode). When PEI indicates paging, the UE performs full PDCCH monitoring (high complexity mode). This dynamic adaptation optimizes system efficiency while managing device complexity through conditional operation.
Solution Approach 2:
The system changes operational parameters based on the PEI indication. The monitoring parameter (whether to perform PDCCH monitoring) is dynamically adjusted based on the PEI content. This parameter change approach allows the unified design to achieve high system efficiency by optimizing monitoring behavior while keeping the actual device complexity manageable through conditional parameter adjustment rather than always operating at maximum complexity.
Data Source
AI summary
Methods and apparatus for physical downlink data channel (PDCCH) and reference signal (RS) based paging in a wireless communication system. A method includes receiving: a first configuration for a search space set in common search space (CSS), wherein the search space set is for a downlink control information (DCI) format that includes a tracking RS (TRS) availability indication field, wherein the TRS availability indication field in the DCI format provides a bitmap; and a second configuration for a number of TRS resources sets. The method further includes determining a TRS resources set from the number of TRS resources sets associated with a bit from the bitmap, wherein TRS resources from the TRS resources set are present for a time duration based on an associated bit for the TRS resources set in the bitmap; and receiving TRS resources from the number of TRS resources sets that are present.