Network Node TN Path Handover for Flexible U-Plane Transport
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Solution Overview
Problem
Current network architectures in 5G wireless communication systems lack the ability to independently develop or select functions related to the transport network, limiting flexibility and efficiency in U-plane transport network configurations.
Innovation Solution
Introduce a generic Transport Network (TN) system with a network node capable of receiving PDCP bearer context modification requests and transferring user data via a TN path using a user plane protocol, enabling independent development and selection of transport network functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional network architecture using GTP-U is used, then the network can maintain stable and proven transport functionality, but independent development and selection of transport network functions cannot be achieved
Solution Approach 1:
The network architecture is segmented into control plane and user plane functions, with the transport network layer separated from upper layer protocols. This segmentation allows independent development and selection of transport network functions (SRv6, optical transport, etc.) without affecting control plane operations, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent introduces a universal transport network layer that can support multiple transport technologies (GTP-U, SRv6, optical transport) through a common interface and framework. This multi-functionality enables carriers to select different transport options while maintaining a consistent network architecture, achieving independent development without proportionally increasing complexity.
2Adaptability or versatility
If SRv6 or optical transportation network is utilized instead of GTP-U, then transport network flexibility and performance are enhanced, but the lack of a generic TN system prevents independent development and selection
Solution Approach 1:
The patent introduces a generic transport network layer as an intermediary between the user plane protocol and underlying transport technologies. This intermediary layer provides standardized interfaces and abstractions, allowing SRv6, optical transport, or GTP-U to be used while maintaining reliable and flexible communication. The intermediary ensures that reliability is maintained through standardized protocols while flexibility is achieved through selectable transport options.
3Adaptability or versatility
If a generic TN system is introduced to allow independent development, then adaptability and flexibility are improved, but the device and system complexity increases
Solution Approach 1:
The generic transport network layer is designed with dynamic capabilities, allowing network nodes to adaptively select and configure transport functions based on operational needs. This dynamic approach enables the system to maintain flexibility and adaptability while managing complexity through automated configuration and selection mechanisms, rather than requiring static, hard-coded transport implementations.
Data Source
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AI summary
A network node includes: a reception unit configured to receive a PDCP (Packet Data Convergence Protocol) bearer context modification request including information indicating a TN (Transport Network) path setup complete from a first network node during execution of a handover procedure; and a transmission unit configured to transfer user data to a destination of a second network node via the TN path by using a user plane protocol.