Radio Network Node Warning Broadcast Recovery
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Solution Overview
Problem
In wireless communication networks, when a radio network node is restarted or newly added, it loses information about ongoing warning broadcasts, leading to users not receiving critical alerts during natural disasters, as the system is not aware of the node's status or its broadcasting capabilities.
Innovation Solution
The method involves the radio network node sending information about its status and supported tracking areas to the core network node, which then checks for ongoing broadcasts and sends a Write Replace Warning request message to the node, enabling it to broadcast the alerts to users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radio network node is restarted or newly added to the network, then the node can be brought back online or integrated into the network, but the node loses information about ongoing warning broadcasts and cannot deliver critical alerts to users
Solution Approach 1:
The core network node performs preliminary actions by proactively checking for ongoing warning broadcasts before the radio network node fully joins the network. The system checks the broadcast status in advance and prepares to send the radio network node the necessary broadcast information, preventing information loss before it occurs rather than reacting after the node has already lost the information.
Solution Approach 2:
The system implements feedback mechanisms where the radio network node sends status information about its restart or addition to the core network node. The core network node then uses this feedback to determine whether ongoing warning broadcasts need to be transferred to the restarted node, creating a closed-loop system that ensures continuous broadcast delivery.
2Reliability
If the core network node continuously monitors and manages broadcast status for all radio network nodes, then warning delivery reliability is improved, but system complexity and overhead increase
Solution Approach 1:
The core network node performs the broadcast status check as a preliminary action when the radio network node indicates restart or addition. This timing is crucial because it performs the complex monitoring function only when needed, rather than continuously, thereby reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The radio network node itself initiates the process by sending status information about its restart or addition state to the core network node. This self-service approach reduces the burden on the core network node to continuously monitor all nodes, as the restarted nodes actively report their status, simplifying the core network's management complexity.
Data Source
AI summary
A method is described performed by a wireless communication network for recovering a public warning system when a radio network node (110) comprising radio circuitry for communication with served user equipments, UEs (100), has been newly added or restarted in the network. The method comprises sending (202), by the radio network node to a core network node(120, 130), information indicating that the radio network node has been restarted or added to the network, the information including one or more tracking area identifiers, TAI, identifying one or more tracking areas that the radio network node supports and/or a radio network node identifier, ID, identifying the radio network node in the communication network, and, in case the radio network node ID is sent but not the one or more TAIs, acquiring (210), by the core network node the one or more TAIs based on the received radio network node ID. The method further comprises checking (204), by the core network node based on the information sent by the radio network node, whether there are any ongoing broadcasts in any of the one or more tracking areas that the radio network node supports, and, when there are ongoing broadcasts in any of the one or more tracking areas that the radio network node supports, sending (206), by the core network node, a Write Replace Warning, WRW, request message to the radio network node, the WRW request message comprising information in the ongoing broadcasts,and broadcasting (208), by the radio network node to the served UEs, the information in the ongoing broadcasts, received in the WRW request message.