CU-DU Emergency Message Delivery for 5G Delay Reduction
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Solution Overview
Problem
Existing 5G wireless communication systems lack an efficient method for delivering emergency messages, such as emergency calls, commercial mobile alert system (CMAS) messages, or public warning messages, when the network entity is split into a central unit (CU) and distributed units (DUs), leading to potential delays and inefficient transmission.
Innovation Solution
A method and apparatus are provided to support the delivery of emergency messages by a base station comprising a central unit (CU) and multiple distributed units (DUs), where the CU receives concurrent write replace warning requests and indicates to each DU for simultaneous message delivery, using concurrent warning message indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a network entity is split into one central unit (CU) and one or more distributed units (DUs) in a 5G wireless communication network, then the system architecture becomes more flexible and scalable, but the method for efficiently processing public warning messages is not yet established
Solution Approach 1:
The base station is divided into a central unit (CU) and distributed units (DUs), with the CU handling higher-layer protocols and message management, while DUs handle lower-layer processing and actual message transmission. This segmentation allows flexible deployment and scaling of warning message processing capabilities across multiple network nodes.
2Productivity
If multiple emergency messages are delivered concurrently in a CU-DU split architecture, then message delivery efficiency is improved, but the complexity of coordinating between CU and DUs increases
Solution Approach 1:
The CU receives and processes write replace warning request messages from the core network before forwarding them to DUs. It prepares the messages, determines concurrency requirements, and coordinates delivery timing in advance, enabling efficient concurrent message delivery without real-time coordination complexity between CU and DUs.
3Loss of time
If emergency messages are delivered quickly in 5G networks, then public safety response time is reduced, but the risk of message loss or transmission errors increases
Solution Approach 1:
The system implements acknowledgment mechanisms where DUs confirm successful receipt and transmission of warning messages to the CU. The CU tracks message delivery status and can retransmit or replace messages if delivery fails, ensuring reliable delivery while maintaining fast response times through efficient error handling.
Data Source
AI summary
The disclosure relates to a device and a method for providing an emergency message in a wireless communication system. An embodiment of the disclosure provides a method and a device for providing an emergency message to a terminal by a base station communicating with the terminal via a wireless interface in a wireless communication system in which the base station comprises one central unit (CU) and one or more distributed units (DUs).