AMF Routing Session Information Using RAN Provided Data

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Solution Overview

Problem

In conventional communication technology, the Access and Mobility Management Function (AMF) cannot route Session Management (SM) information received from the Radio Access Network (RAN), leading to issues with routing reply messages.

Innovation Solution

The proposed solution involves a routing method and device where the AMF receives session-related information and routing information from the RAN, and routes it to the relevant Session Management Function (SMF) using the provided routing information, including transmitting acknowledgement messages and combining information from multiple SMFs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the AMF receives session-related information from the RAN without routing information, then the AMF can receive the information, but the AMF cannot route the reply message correctly

Engineering Contradiction:

Improvemessage routing reliabilityVSAvoidrouting information loss

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent introduces routing information as an intermediary element that bridges the RAN and SMF. The RAN includes routing information in messages to the AMF, and the AMF uses this routing information to correctly forward session-related information to the appropriate SMF, ensuring reliable message routing without information loss.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies preliminary action by having the RAN include routing information in advance before the session-related information needs to be routed. This preliminary inclusion of routing information allows the AMF to perform correct routing when receiving the session-related information, preventing routing failures.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If the AMF combines multiple pieces of session-related information from multiple SMFs into one message, then the message structure is simplified, but the complexity of processing increases

Engineering Contradiction:

Improvemessage structure complexityVSAvoidinformation processing efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies merging by combining multiple pieces of session-related information from multiple SMFs into a single message structure. The AMF consolidates these fragmented information pieces into one unified message that can be efficiently processed and routed, reducing the overall complexity of message handling while maintaining processing efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11612006B2Routing method and device

Publication Date: 2023.03.21 DATANG MOBILE COMM EQUIP CO LTD

AI summary

The present disclosure provides a routing method and a routing device. The routing method includes: receiving, by an AMF, a first message from an (R)AN, the first message including session-related information and routing information associated with the session-related information; and routing, by the AMF, the session-related information to a relevant SMF in accordance with the routing information. According to the present disclosure, it is able to correctly route the session-related information between the (R)AN and the SMF.