Low-Power Wakeup Signal for Multicast Broadcast Paging
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Solution Overview
Problem
In 5G/NR wireless communication systems, user equipment (UE) experiences high power consumption due to unnecessary monitoring of paging occasions (PO) for multicast and broadcast sessions, leading to increased battery drain and reduced efficiency.
Innovation Solution
Implementation of a low-power receiver (LR) and main receiver (MR) configuration in UE, where the LR monitors for a low-power wakeup signal (LP WUS) and instructs the MR to monitor for multicast broadcast (MBS) session data only when activated, reducing unnecessary MR wake-ups and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main receiver (MR) continuously monitors paging occasions for multicast and broadcast sessions, then the UE can reliably receive MBS session data, but the power consumption increases significantly
Solution Approach 1:
The receiver is divided into two distinct segments: a low-power receiver (LR) that continuously monitors for wake-up signals, and a main receiver (MR) that is activated only when necessary. This segmentation allows the system to maintain reliable MBS session data reception through the MR while significantly reducing power consumption by keeping the LR operational during idle periods.
Solution Approach 2:
The low-power receiver performs preliminary monitoring for wake-up signals before the main receiver is activated. This preliminary action enables the system to detect incoming paging occasions or MBS session notifications in advance, allowing the MR to be activated only when actual data transmission is detected, thereby avoiding unnecessary power consumption during idle periods.
2Loss of information
If the main receiver (MR) is activated for every paging occasion, then no MBS session data is missed, but unnecessary wake-ups increase power consumption
Solution Approach 1:
The low-power receiver acts as an intermediary between the network and the main receiver. It monitors paging occasions and detects wake-up signals or MBS session notifications, then selectively activates the MR only when relevant data is present. This intermediary function prevents the MR from waking up unnecessarily while ensuring that no actual MBS session data is missed.
Solution Approach 2:
The low-power receiver autonomously monitors paging occasions and determines whether the main receiver needs to be activated based on the presence of wake-up signals or MBS notifications. This self-service capability eliminates the need for continuous MR operation while ensuring that actual data transmissions are captured, thereby reducing energy waste from unnecessary wake-ups.
3Loss of time
If the low-power receiver (LR) monitors continuously, then wake-up signals are detected timely, but the system complexity increases due to dual receiver architecture
Solution Approach 1:
The receiver functionality is segmented into two specialized components with distinct roles: the LR handles continuous monitoring of wake-up signals with minimal power consumption, while the MR handles full MBS session data reception when activated. This segmentation resolves the contradiction by assigning specific functions to each receiver type, enabling timely wake-up signal detection without requiring the full complexity of the MR to operate continuously.
Data Source
AI summary
Methods and apparatuses for a paging monitoring operation for a multicast and broadcast session in a wireless communication system. A method performed by a user equipment (UE) includes monitoring for a low power wakeup signal (LP WUS) on a carrier of a cell where the UE is camped; receiving the LP WUS; instructing a main receiver (MR) to monitor for multicast broadcast (MBS) session data in response to a reception of the LP WUS; and receiving the MBS session data when at least one MBS session is activated.