5G Wireless Device Paging DCI Wake-Up Signal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G New Radio (NR) systems waste processing power and resources as wireless devices in RRC_INACTIVE and RRC_IDLE modes decode the Physical Downlink Shared Channel (PDSCH) to determine if a Paging Message is intended for them, even if not needed, leading to unnecessary power consumption.
Innovation Solution
Implementing a method where wireless devices decode a downlink control information (DCI) message to determine if a Paging Message is intended, skipping PDSCH decoding when not needed, and only decoding when the message is intended for the device, using a DCI format 1_0 message with a Paging-Radio Network Temporary Identifier (P-RNTI) for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices in RRC_IDLE mode decode the PDSCH to determine if a Paging Message is intended for them, then they can receive paging messages, but they consume unnecessary power when the message is not intended for them
Solution Approach 1:
The paging indication is segmented into two parts: a wake-up indication transmitted on PDCCH, and the actual paging message transmitted on PDSCH. Devices first decode the lightweight PDCCH to determine if they need to wake up and decode the full PDSCH, thereby avoiding unnecessary PDSCH decoding when not paged.
Solution Approach 2:
Devices perform partial decoding of the paging indication by first checking the PDCCH for wake-up signals before committing to full PDSCH decoding. This partial action allows devices to avoid the complete power-consuming PDSCH decoding process when not intended to receive paging messages.
2Reliability
If wireless devices decode the PDSCH every paging occasion, then they ensure no paging messages are missed, but they waste processing power and resources
Solution Approach 1:
The paging procedure is segmented into a two-stage process: first decoding PDCCH for wake-up indication, then conditionally decoding PDSCH only when paged. This segmentation eliminates the need to decode PDSCH at every paging occasion, reducing processing power waste while maintaining reliable paging detection.
Solution Approach 2:
The PDCCH wake-up indication serves as a preliminary action that prepares devices by notifying them in advance whether a paging message will be transmitted. This preliminary notification allows devices to avoid unnecessary PDSCH decoding and return to sleep mode, reducing processing power waste.
3Speed
If wireless devices continuously monitor paging channels, then they can detect paging messages immediately, but they increase power consumption
Solution Approach 1:
Devices monitor paging channels periodically at configured paging occasions rather than continuously. At each paging occasion, they first check the PDCCH for wake-up indications before conditionally decoding PDSCH. This periodic monitoring with conditional decoding maintains fast paging detection capability while significantly reducing power consumption compared to continuous monitoring.
Data Source
AI summary
Various embodiments may provide systems and methods for supporting wireless device paging in a network, such as a Fifth Generation (5G) New Radio (NR) (5GNR) network, etc. In various embodiments, a wireless device may determine whether to decode a Physical Downlink Shared Channel (PDSCH) paging message based at least in part on an indication in a received downlink control information (DCI) message.