E2 Subscription Messages for Event-Based Multi-Cell RAN Control
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Solution Overview
Problem
Existing 4G/5G communication systems face challenges in providing differentiated service support and efficient resource management due to limited cell coverage and restricted monitoring of radio resources, particularly in virtualized networks, where the RIC's call processing is restricted to a base station basis, limiting the number of supportable cells and efficient resource optimization.
Innovation Solution
The introduction of an E2 subscription message system that allows the RIC to generate and transmit messages to O-DU, O-CU-CP, and O-CU-UP, enabling event-based condition setting and reporting, with detailed information elements to support user-specific, cell-specific, and network slice-specific services, facilitating resource optimization through machine learning and carrier aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the RIC's call processing is restricted to a base station basis, then the system structure is simpler, but the number of supportable cells is limited and resource optimization efficiency deteriorates
Solution Approach 1:
The patent segments the call processing function from the base station level to the RIC level, allowing multiple cells to be managed by a single RIC. This segmentation enables the RIC to handle call processing for multiple cells simultaneously, thereby increasing the number of supportable cells and improving resource optimization efficiency without significantly increasing base station complexity.
2Device complexity
If the RIC monitors radio resources at base station level only, then the monitoring scope is limited, but the system complexity is reduced
Solution Approach 1:
The patent introduces a new dimension for resource monitoring by enabling the RIC to monitor radio resources across multiple cells simultaneously at a higher hierarchical level. This dimensional shift from base station-level monitoring to RIC-level multi-cell monitoring expands the monitoring scope without proportionally increasing system complexity, as the RIC consolidates monitoring functions for multiple cells.
3Device complexity
If differentiated service support is not implemented, then the network structure is simpler, but user-specific service capabilities deteriorate
Solution Approach 1:
The patent implements local quality by enabling the RIC to provide differentiated service support tailored to specific users, cells, or network slices within the broader network. The RIC can apply different service policies, resource allocation strategies, and quality of service parameters to different local contexts (users, cells, slices) while maintaining a unified network structure, thereby enhancing user-specific service capabilities without requiring fundamentally different network architectures.
Data Source
AI summary
The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method performed by an E2 node is provided. The method includes receiving a radio access network (RAN) intelligent controller (RIC) subscription request message from an RIC via an E2 interface, and the RIC subscription request message may include information indicating a network interface type.