LP-WUR Wakeup Timing for eDRX Paging Response
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption and resource allocation for user equipment (UE) during extended discontinuous reception (eDRX) cycles, particularly in scenarios involving low-power wakeup signals (LP-WUS) and group paging mechanisms.
Innovation Solution
The integration of low-power wakeup receivers (LP-WUR) and extended DRX configurations allows UEs to wake up from deep sleep states based on LP-WUS, enabling precise timing for paging occasions (PO) and random access channel procedures, optimizing power usage and resource management through synchronized group LP-WUS detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UEs perform RRM measurements according to eDRX cycle periodicity, then power consumption is reduced during deep sleep states, but response time to paging messages increases due to longer wake-up intervals
Solution Approach 1:
The patent segments the reception function into two parts: a low-power wakeup receiver that continuously monitors for LP-WUS signals, and a main radio that remains in deep sleep state. This segmentation allows the system to maintain low power consumption while enabling rapid response to paging messages through the always-on wakeup receiver.
Solution Approach 2:
The low-power wakeup receiver performs preliminary monitoring of the channel for LP-WUS signals before the main radio needs to wake up. This preliminary action enables the main radio to be awakened only when necessary, reducing both power consumption and response time by preparing the system in advance for potential paging messages.
2Use of energy by moving object
If UEs use LP-WUR to detect LP-WUS and wake main radio, then power efficiency improves, but device complexity increases due to additional receiver components
Solution Approach 1:
The patent implements a simple, low-cost low-power wakeup receiver that performs basic signal detection functions. This receiver is designed to be computationally simple and energy-efficient, accepting limited functionality in exchange for dramatically reduced power consumption and simplified device architecture.
Solution Approach 2:
The LP-WUR acts as an intermediary component between the external LP-WUS signals and the main radio system. It performs the intermediate function of signal detection and triggering, allowing the main radio to remain in deep sleep state while still enabling rapid wake-up when needed.
3Productivity
If UEs monitor paging occasions with different periodicity than eDRX cycles, then paging response efficiency improves, but resource allocation complexity increases
Solution Approach 1:
The patent implements dynamic periodicity adjustment where the UE can operate with different monitoring periodicities for different functions. The LP-WUS monitoring uses one periodicity while paging message monitoring uses another, allowing the system to optimize performance for each function independently without increasing overall complexity.
Solution Approach 2:
The system changes the time parameter (periodicity) differently for different monitoring functions. By allowing PO periodicity to differ from eDRX cycle periodicity, the patent optimizes paging response efficiency while maintaining manageable resource allocation through clear parameter separation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform radio resource management (RRM) measurements according to a first periodicity associated with an extended discontinuous reception (eDRX) cycle. The UE may wake a main radio from a deep sleep state based at least in part on a low power wakeup receiver (LP-WUR) detecting a low-power wakeup signal (LP-WUS). The UE may monitor a paging occasion (PO) for a paging message using the main radio based at least in part on the LP-WUS, the PO having a time location associated with a second periodicity that differs from the first periodicity. Numerous other aspects are described.