Always-On Packet Data Network Connection Management
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) connected to multiple packet data networks (PDNs) may not be notified of disconnections when in idle mode, leading to unawareness of service availability and potential disruptions in critical applications.
Innovation Solution
A method and apparatus that establish a connection between UE and PDNs, designate PDNs as 'always-on,' and notify the UE of disconnections while in idle mode through paging, with the option to delay notification based on a predefined time interval for reconnection attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE enters idle mode to save energy and reduce network signaling, then energy consumption is reduced, but the UE cannot be notified of PDN disconnections
Solution Approach 1:
The network side performs preliminary monitoring of PDN connection status and prepares disconnection notifications in advance. When a PDN disconnection occurs, the network has already detected the loss of connection and can immediately page the UE, ensuring the UE is notified without needing to maintain continuous connection for monitoring.
2Reliability
If the UE maintains continuous connection to detect disconnections, then disconnection detection is improved, but energy consumption increases
Solution Approach 1:
The network side acts as an intermediary that monitors PDN connection status on behalf of the UE. The gateway or network entity detects PDN disconnections and pages the UE to notify it, eliminating the need for the UE to maintain continuous connection for monitoring while ensuring reliable disconnection detection.
3Reliability
If the UE is immediately notified of PDN disconnection, then service continuity is improved, but unnecessary reconnection attempts occur during temporary outages
Solution Approach 1:
The system implements a buffer mechanism where the network monitors PDN connection status and delays notification to the UE until the disconnection is confirmed to be persistent. This cushioning approach prevents immediate notification during temporary outages, avoiding unnecessary reconnection attempts while still ensuring timely notification for permanent disconnections.
Data Source
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus, e.g., a network entity, may establish a connection between a user equipment (UE) and a packet data network, designate the packet data network with an always-on status, and notify the UE, while the UE is in the idle mode, when a loss of connection with the packet data network is detected. The UE may be connected to another packet data network when the loss of the connection occurs. A service provided by the packet data network may be designated as having an always-on status and the UE may be notified when a loss of the service is detected.