Wireless System Information Scheduling for eDRX Paging
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in system information scheduling and cell reselection for reduced capability devices, particularly those configured with extended discontinuous reception (eDRX), due to limitations in paging configuration, power consumption, and lack of space for carrying indicators like hyper system frame number (H-SFN), leading to suboptimal power usage and inadequate cell reselection methods.
Innovation Solution
Implementing distinct configurations and notifications for devices with and without reduced capability, including separate paging occasion monitoring, system information updates, and cell reselection procedures, using downlink control information (DCI), wake-up signals (WUS), and hyper system frame number (H-SFN) management to optimize power efficiency and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE operating in eDRX monitors paging occasions with the same configuration as normal UEs, then the base station can maintain unified paging management, but the base station cannot change the paging configuration for normal UEs within an eDRX acquisition period
Solution Approach 1:
The patent segments the UE population into two distinct groups: eDRX UEs and non-eDRX UEs. Each group is assigned separate paging configurations and monitoring parameters. This allows the base station to independently modify paging configurations for non-eDRX UEs without being constrained by the longer eDRX acquisition period, thereby resolving the contradiction between configuration flexibility and time loss.
2Reliability
If a UE needs to monitor paging occasion or receive a paging message only for receiving a system information change notification, then the UE can stay synchronized with system information updates, but it is not power efficient for the UE
Solution Approach 1:
The patent extracts the system information change notification from the traditional paging message structure and transmits it through dedicated system information blocks (SIBs). This allows UEs to acquire system information updates without needing to monitor paging occasions specifically for notifications, thereby maintaining synchronization reliability while significantly reducing power consumption by eliminating unnecessary paging monitoring.
3Measurement precision
If an indicator from the BS is needed for a UE to verify whether its locally stored system information is valid, then the UE can ensure system information accuracy, but there is not enough space in a master information block (MIB) message to carry this indicator or the H-SFN
Solution Approach 1:
The patent moves the system information validity indicator and H-SFN from the constrained MIB message dimension to the SIB dimension, which offers expanded capacity. Specifically, these elements are carried in SIB1 or other system information blocks, providing an additional dimensional space for information transmission. This resolves the contradiction by preserving verification precision while eliminating the MIB capacity limitation.
4Adaptability or versatility
If there is no cell reselection method in current standard for a reduced capability UE, then the standard maintains simplicity, but reduced capability UEs lack adequate cell reselection functionality
Solution Approach 1:
The patent applies local quality by introducing cell reselection methods specifically tailored for reduced capability UEs, rather than implementing a universal complex method for all UEs. The solution includes UE-specific parameters such as reduced bandwidth part configurations, simplified measurement requirements, and adapted reselection criteria that match the capabilities of reduced capability devices. This provides adequate cell reselection functionality for target devices while maintaining standard simplicity for other UE types.
Data Source
AI summary
Methods, apparatus and systems for scheduling and transmission of system information in a wireless communication are disclosed. In one embodiment, a method performed by a wireless communication node is disclosed. The method comprises: transmitting, to a first wireless communication device having a first device type, a first configuration associated with the first device type for the first wireless communication device to perform paging occasion monitoring, wherein a device having the first device type is a reduced capability device or is configured with extended discontinuous reception (eDRX); and transmitting, to a second wireless communication device having a second device type, a second configuration associated with the second device type for the second wireless communication device to perform paging occasion monitoring, wherein a device having the second device type is not a reduced capability device and not configured with eDRX.