5G CU-DU Paging Message Segmentation for Cause Notification
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Solution Overview
Problem
The existing paging mechanisms in 5G network systems, particularly in the CU-DU architecture, need enhancement to effectively notify user equipment (UE) of system message changes and other paging causes, as the current mechanisms are not adequately adapted to the new architecture.
Innovation Solution
A method where a central unit (CU) sends a paging message to a distributed unit (DU) carrying indication information, which the DU then uses to generate downlink control information (DCI) and notify UEs of the paging cause, including system message changes, and continuously updates identification information of target UEs by sending updated paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the existing paging mechanism is used in the CU-DU architecture, then the network can maintain a simplified structure, but the paging cause cannot be effectively notified to UEs
Solution Approach 1:
The paging message is segmented into multiple parts: a first part sent from CU to DU containing indication information about the paging cause, and a second part sent from DU to UE containing the actual paging notification. This segmentation allows the paging cause information to be preserved and transmitted effectively while maintaining a relatively simple overall mechanism.
Solution Approach 2:
The DU acts as an intermediary between the CU and the UE in the paging process. The CU sends indication information to the DU, which then uses this information to generate DCI and notify UEs of the paging cause. This intermediary role enables effective information transmission while distributing system functions appropriately.
2Loss of information
If indication information is added to the paging message, then the paging cause can be notified to UEs, but the signaling overhead increases
Solution Approach 1:
The indication information about the paging cause is extracted and placed in a separate first part of the paging message that is sent from CU to DU. This extraction allows the core paging cause information to be transmitted efficiently without burdening the second part of the message that communicates with UEs, thereby reducing overall signaling overhead while preserving necessary information.
3Measurement precision
If the paging mechanism is enhanced to adapt to CU-DU architecture, then the notification accuracy improves, but the implementation complexity increases
Solution Approach 1:
The paging mechanism is made dynamic by allowing the DU to generate DCI based on indication information received from the CU. This dynamic generation process enables accurate notification of paging causes while adapting to the specific CU-DU architecture, balancing improved accuracy with manageable implementation complexity through flexible, context-aware message construction.
Data Source
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AI summary
Embodiments of this application disclose a method for sending a paging message and a related device, so as to notify each UE of a paging cause. The method in the embodiments of this application includes: sending, by a first network node, a paging message to a second network node, where the paging message carries indication information, and the indication information is used to indicate a paging cause.