Serving Gateway User-Plane Selection for IP-Compatible Attach Requests
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Solution Overview
Problem
Conventional systems face challenges in efficiently selecting serving gateways that are compatible with the IP version supported by user equipment (UE) in advanced wireless communications networks, leading to potential service interruptions and poor quality of service due to random or round-robin selection methods that do not account for IP versions.
Innovation Solution
Implementing systems and techniques that enable the serving gateway controller (SGW-C) to determine the preferred IP version from a UE's attach request and select a co-located serving gateway (SGW-U) and packet data network (PGW-U) that supports the indicated protocol, with the packet data network controller (PGW-C) verifying or selecting an alternative gateway if necessary to ensure compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If random or round-robin gateway selection is used, then gateway selection simplicity is maintained, but service reliability deteriorates due to potential IP version incompatibility
Solution Approach 1:
The system performs preliminary action by extracting the PDN type indicator from the attach request before gateway selection occurs. This allows the network to pre-determine the required IP version compatibility and select an appropriate serving gateway in advance, preventing connection failures before they occur.
Solution Approach 2:
The system implements feedback by using the PDN type indicator from the attach request to guide the gateway selection process. The indicator provides feedback about the UE's IP version requirements, enabling the network to adjust its selection criteria accordingly and ensure compatibility.
2Device complexity
If gateway selection does not account for IP version, then selection process remains simple, but connection setup time increases due to compatibility issues
Solution Approach 1:
The system performs preliminary action by extracting the PDN type indicator from the attach request before gateway selection occurs. This allows the network to pre-determine the required IP version compatibility and select an appropriate serving gateway in advance, preventing connection failures before they occur.
Solution Approach 2:
The system implements feedback by using the PDN type indicator from the attach request to guide the gateway selection process. The indicator provides feedback about the UE's IP version requirements, enabling the network to adjust its selection criteria accordingly and ensure compatibility.
3Reliability
If IP version compatibility is enforced during gateway selection, then service reliability is improved, but selection process complexity increases
Solution Approach 1:
The system extracts the PDN type indicator from the attach request, separating this critical compatibility information from the rest of the signaling message. By taking out this specific field, the network can focus gateway selection logic on this single key parameter rather than analyzing the entire complex attach request structure.
Solution Approach 2:
The system applies local quality by making the gateway selection process aware of and responsive to the specific PDN type indicator. Different gateway selection criteria are applied based on the extracted indicator value (IPv4, IPv6, or IPv4v6), allowing tailored selection for each IP version requirement without affecting other aspects of the connection setup.
Data Source
AI summary
System and methods for efficient serving gateway and packet data gateway selections are described. A mobile device may attempt transmit an attach request to a network requesting packet data services in a particle protocol. A control plane of a serving gateway may receive the attach request and determine a serving gateway user plane that is configured to operate in the specified protocol. The serving gateway control plane may then propagate the determined serving gateway user plane to a packet data network gateway control plane for selection of the serving gateway user plane and a corresponding packet data network gateway user plane for use in providing packet services to the mobile device.