RS Availability Indication via PEI and Paging PDCCH
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing reference signal (RS) availability indications for idle/inactive user equipment (UE) in 5G NR technology, which affects power consumption and tracking accuracy.
Innovation Solution
The proposed solution involves a method where a base station transmits a Paging Early Indication (PEI) and a paging Physical Downlink Control Channel (PDCCH) to a UE, providing separate availability indications for different sets of RS resources, allowing the UE to determine which RS resources are available for tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the base station transmits only a single availability indication for all RS resources, then the signaling overhead is reduced, but the UE cannot accurately determine which specific RS resources are available, leading to reduced tracking accuracy
Solution Approach 1:
The patent segments the availability indication into two separate indications: a first availability indication transmitted via PEI that applies to a first set of RS resources, and a second availability indication transmitted via paging PDCCH that applies to a second set of RS resources. This segmentation allows the UE to accurately determine which specific RS resources are available for tracking while avoiding unnecessary power consumption by not monitoring all RS resources continuously.
2Measurement precision
If the base station provides detailed availability indications for all RS resources, then the UE can accurately determine available resources for tracking, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent divides the RS resources into two distinct sets with separate availability indications. The first set is indicated via PEI and the second set via paging PDCCH, reducing the complexity of providing detailed availability information while maintaining tracking accuracy for each specific set of resources.
Solution Approach 2:
The patent introduces the PEI as an intermediary mechanism that provides preliminary availability information before the actual paging transmission. This intermediary layer simplifies the overall system by handling the complexity of RS availability indication separately from the paging message transmission.
3Reliability
If the UE monitors all RS resources continuously to ensure accurate tracking, then the tracking accuracy is maintained, but the power consumption increases
Solution Approach 1:
The patent employs preliminary action by transmitting the first availability indication via PEI before the actual paging transmission. This allows the UE to advance know which RS resources will be available, enabling the UE to skip monitoring of unavailable resources and thereby reduce power consumption while maintaining tracking accuracy for the indicated resources.
Solution Approach 2:
The patent implements dynamic RS resource availability indication where the availability of RS resources can change based on network conditions and paging requirements. The UE adapts its monitoring behavior dynamically based on the received availability indications, monitoring only when and where RS resources are actually available, thus optimizing the balance between tracking accuracy and power consumption.
Data Source
AI summary
Methods, computer programs products, and apparatuses for RS availability indication are provided. An example method at a UE may include receiving, from a base station, a PEI comprising a first availability indication for a first set of RS resources in one or more RS occasions. The example method may further include receiving, from the base station, a paging PDCCH comprising a second availability indication for a second set of RS resources in the one or more RS occasions. The example method may further include receiving, from the base station, at least one of the first set of RS resources or the second set of RS resources.