C/U Plane Split Bearer Architecture for Base Station Load Management
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Solution Overview
Problem
The existing radio communication systems face challenges in providing a suitable bearer architecture for the C/U plane split scenario, where a macro cell handles the control plane and a low-power node handles the user plane, requiring efficient signaling and data bearer establishment between different network entities.
Innovation Solution
A radio communication system is designed with a first base station establishing signaling and data bearers with a second base station and a mobile station, allowing the second base station to provide user plane services while the first base station manages control plane functions, with configuration information being transmitted through signaling bearers to establish and manage data bearers in the second base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the macro base station handles both control plane and user plane functions, then the network architecture is simple, but the processing load on the macro base station increases
Solution Approach 1:
The patent segments the base station functions into control plane (C-plane) and user plane (U-plane). The macro base station handles C-plane functions while the low-power node handles U-plane functions, dividing the processing load and reducing the burden on the macro base station without completely redesigning the network architecture.
2Productivity
If the low-power node provides user plane services independently, then the processing load on macro base station is reduced, but the bearer architecture complexity increases
Solution Approach 1:
The patent introduces a bearer architecture where the macro base station acts as an intermediary between the core network and the low-power node. The macro base station establishes signaling bearers with the core network and data bearers with the low-power node, mediating the complex interactions and simplifying the overall system management.
3Productivity
If configuration information is transmitted through signaling bearers, then the data bearer establishment is efficient, but the signaling overhead increases
Solution Approach 1:
The patent establishes signaling bearers in advance before data transmission begins. Configuration information is prepared and transmitted through these pre-established signaling bearers, allowing for efficient data bearer setup without repeated signaling exchanges during actual data transmission.
Data Source
AI summary
A first base station (1) is configured to establish a first signaling bearer with a mobility management apparatus (5), establish a second signaling bearer with a second base station (2), and to establish a signaling radio bearer with a mobile station (3) in a first cell (10). The second base station (2) is configured to establish the second signaling bearer with the first base station (1), establish a data bearer with a data transfer apparatus (6), and to establish a data radio bearer with the mobile station (3) in a second cell (20). Furthermore, the first base station (1) is configured to transmit, to the second base station (2) through the second signaling bearer configuration information, necessary to establish the data bearer and the data radio bearer in the second base station (2). Thus, for example, bearer architecture suitable for a C/U plane split scenario is provided.