Home Gateway Core Network Node Selection via GUMMEI
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Solution Overview
Problem
The integration of home base stations in radiocommunication networks poses challenges for core network node selection, particularly due to the need to avoid frequent and unnecessary inter-MME context transfers, which result in redundant signaling and strain on the network infrastructure.
Innovation Solution
A method and system where a home gateway receives a connection establishment message without an S-Temporary Mobile Subscriber Identity (S-TMSI) and selects the core network node based on information within the message, utilizing the Globally Unique MME Identity (GUMMEI) from the NAS message to determine the appropriate MME for UE connections, thereby reducing redundant signaling and context transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a home gateway selects a core network node based on information in a connection establishment message without S-TMSI, then network efficiency is improved by reducing redundant signaling and context transfers, but the complexity of the home gateway increases due to the need to parse and interpret message fields
Solution Approach 1:
The home gateway acts as an intermediary between the home base station and the core network node. It receives connection establishment messages, extracts relevant information (such as GUMMEI or other identifying fields) without requiring S-TMSI, and uses this information to select the appropriate core network node. This intermediary function allows the gateway to make intelligent routing decisions based on available message fields, reducing unnecessary context transfers while managing complexity through standardized parsing procedures
Solution Approach 2:
The invention changes the parameter used for core network node selection from requiring S-TMSI to using alternative fields present in the connection establishment message (such as GUMMEI, eNB ID, or other identifying information). This parameter change allows the system to function effectively even when S-TMSI is not available, maintaining network efficiency without the strict requirement for traditional identity parameters
2Loss of energy
If the home gateway uses information from the connection establishment message for node selection, then unnecessary inter-MME context transfers are reduced, but the risk of selecting the wrong core network node increases due to limited identification information
Solution Approach 1:
The home gateway performs preliminary analysis of the connection establishment message to identify suitable core network nodes before actual connection establishment. By examining available fields in advance (such as GUMMEI, tracking area information, or home base station identifiers), the gateway can pre-determine the most appropriate target node, reducing the need for subsequent corrections or context transfers and ensuring accurate selection from the outset
Solution Approach 2:
The system incorporates feedback mechanisms where the home gateway monitors the results of node selection decisions. If selection errors occur or suboptimal routing is detected, the gateway can adjust its selection criteria based on observed patterns in the connection establishment messages, improving reliability over time while continuing to use the available message fields effectively
Data Source
AI summary
Systems and methods according to these exemplary embodiments provide for improving communications systems which use home gateways or the like. This can be obtained by avoiding potentially frequent inter-MME (intra-MME pool) context transfers. This can then reduce unnecessary or redundant signalling.