Paging Early Indication for Wireless Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, user equipment (UE) continues to consume power monitoring paging early indication (PEI) occasions even when the network entity does not have messages to transmit, leading to inefficient power usage due to the lack of clear indication to stop monitoring.
Innovation Solution
The UE is configured with multiple PEI occasions to monitor for an indication that the network entity has successfully performed a shared spectrum channel access procedure and has no additional messages to transmit, allowing the UE to skip remaining PEI occasions based on explicit or implicit signals, such as short messages or downlink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continues to monitor all PEI occasions to ensure it does not miss any paging messages, then the reliability of message reception is improved, but the power consumption increases
Solution Approach 1:
The network entity performs a preliminary channel access procedure (LBT) before the PEI occasion and transmits an early indication signal if the channel is clear but no messages are available. This preliminary action allows the UE to skip monitoring subsequent PEI occasions, ensuring message reliability is maintained while reducing power consumption by enabling early idle state transition.
2Reliability
If the network entity transmits multiple PEI occasions to provide multiple channel access opportunities, then the reliability of PEI transmission is improved, but the UE power consumption increases due to extended monitoring
Solution Approach 1:
The network entity performs the channel access procedure in advance before each PEI occasion and transmits an early indication signal at the first available opportunity. This preliminary action eliminates the need for the UE to monitor multiple PEI occasions, as the early indication provides sufficient information to determine whether to wake up for subsequent paging occasions, thereby reducing UE monitoring energy while maintaining PEI transmission reliability.
3Measurement precision
If the UE monitors each PEI occasion to determine whether to wake up for paging, then the accuracy of paging detection is improved, but the loss of time in idle state transitions increases
Solution Approach 1:
The network entity performs channel access and determines message availability in advance, then transmits an early indication signal before the PEI occasion. This preliminary action provides the UE with accurate paging detection information earlier, allowing the UE to make wake-up decisions without waiting for the actual PEI occasion, thereby reducing idle state transition time while maintaining paging detection accuracy.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may operate in an idle mode in which the UE does not actively monitor for incoming transmissions. In some cases, the network may probe the idle UE by sending a paging early indication (PEI), which may trigger the UE to monitor paging occasions for incoming data. If the UE does not receive the PEI on the first PEI occasion, the UE may continue to monitor subsequent PEI occasions. However, the UE may stop monitoring subsequent PEI occasions once the data has been received. Accordingly, the network may indicate a stop trigger implicitly or explicitly to the UE. In some cases, the stop trigger may be an indication in a short message or downlink control information (DCI). Additionally, or alternatively, the UE may stop monitoring after receiving any downlink transmission.