MME-SGSN Messaging for Paging Reduction in Idle Signaling Networks
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Solution Overview
Problem
Current mobile network technologies face inefficiencies in reducing paging in access networks where user equipment (UE) is not present, leading to excessive use of radio resources and increased signaling load, particularly when idle signaling reduction (ISR) is active.
Innovation Solution
Implementing a messaging-based solution that allows core network nodes to track the UE's location without unnecessary paging by determining its connection status across multiple radio access technologies, thereby reducing paging in access networks and optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If idle signaling reduction (ISR) is active to reduce signaling load, then signaling load is reduced, but paging efficiency deteriorates leading to excessive paging in access networks where UE is not present
Solution Approach 1:
The system performs preliminary actions by having the MME proactively notify the SGSN about UE connection status changes before paging is needed. When the UE transitions to connected state, the MME sends a notification message to the SGSN in advance, enabling the SGSN to update its records and avoid subsequent unnecessary paging operations.
Solution Approach 2:
The system implements feedback mechanisms where the MME provides real-time information about UE connection status to the SGSN. This feedback loop ensures that the SGSN has current knowledge of UE location and connection state, allowing it to make informed decisions about whether to page the UE, thereby improving paging efficiency while maintaining reduced signaling load.
2Reliability
If paging is performed in access networks where UE is not present, then UE can be located, but radio resources are excessively consumed
Solution Approach 1:
The MME performs preliminary notification to the SGSN about UE connection status before any paging operation is required. This advance information allows the SGSN to determine in advance whether the UE is present in its access network, eliminating the need for wasteful paging operations in networks where the UE is not located.
Solution Approach 2:
The MME acts as an intermediary that bridges the information gap between networks. By notifying the SGSN about UE connection status, the MME enables the SGSN to make accurate decisions about paging necessity, thereby preventing radio resource consumption in networks where the UE is not present while maintaining reliable UE location tracking.
3Productivity
If ISR is active to optimize network resources, then network resources are optimized, but paging channel usage increases due to unnecessary paging
Solution Approach 1:
The system sends preliminary notification messages from the MME to the SGSN about UE connection status changes. This preliminary action enables the SGSN to update its internal state and avoid generating unnecessary paging messages, thereby reducing paging channel usage while maintaining network resource optimization benefits of ISR.
Solution Approach 2:
The notification mechanism creates a feedback loop where the MME provides real-time connection status information to the SGSN. This feedback enables the SGSN to accurately determine when paging is necessary and when it is not, reducing unnecessary paging channel usage while preserving the network resource optimization achieved through ISR.
Data Source
AI summary
Systems and methods are provided for avoiding excessive paging through messaging-based solutions on a mobile network that supports multiple radio access technologies (RATs), such as both Long Term Evolution (LTE) and Global System for Mobile Communications (GSM)/Enhanced Data Rates for GSM Evolution (EDGE)/Universal Mobile Communications System (UMTS) technology, even in situations where the present location of the UE is not known. Preventing paging in access networks where the UE is not present ensures efficient use of radio resources in the paging channel and reduces signaling load on other interfaces. In one embodiment, a user equipment (UE) is simultaneously connected to a Serving General Packet Radio System (GPRS) Support Node (SGSN) and a Mobility Management Entity (MME). By using signaling between the SGSN and MME, the location of the UE may be tracked without requiring unnecessary paging, even when the UE is in IDLE mode or is inactive.