WTRU Network Slice Selection for Dynamic Service Connections
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Solution Overview
Problem
Existing 5G network architectures face challenges in efficiently managing diverse use cases with varying service requirements due to the lack of effective network slice discovery, selection, and connection mechanisms, leading to issues in resource allocation and network flexibility.
Innovation Solution
Implementing a network control node that receives service information, determines appropriate network slices based on QoS, mobility, and subscriber data, and facilitates connections to these slices, with support for dynamic changes and third-party application server involvement in slice selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a monolithic network framework is used, then network architecture is simple, but network flexibility and ability to provide differentiated service are limited
Solution Approach 1:
The network is segmented into multiple network slices, each independently configured to serve specific service requirements. The monolithic network framework is divided into separate slice instances (e.g., slice A, slice B) that can be independently managed and optimized for different use cases while sharing underlying physical resources.
Solution Approach 2:
The network architecture transitions from static to dynamic through the introduction of network slicing. Slices can be dynamically created, modified, and terminated based on service demands. The system supports dynamic slice selection and switching, allowing the network to adapt to changing requirements without reconfiguring the entire infrastructure.
2Adaptability or versatility
If uniform procedures are used for resource assignment, then system simplicity is maintained, but ability to meet diverse service requirements is reduced
Solution Approach 1:
Different resource assignment procedures are applied to different network slices based on their specific service requirements. Each slice can have customized QoS parameters, pricing models, and resource allocation strategies tailored to its intended use case, while the overall system maintains a unified management framework.
Solution Approach 2:
The system changes key parameters such as QoS requirements, service class, and pricing models on a per-slice basis. These parameter variations enable the network to accommodate diverse service types (e.g., low-latency communications, high-bandwidth applications) without requiring completely different operational procedures for each service.
3Adaptability or versatility
If network slicing is introduced to support diverse use cases, then network flexibility improves, but complexity in slice discovery, selection, and connection increases
Solution Approach 1:
A network control node is introduced as an intermediary to manage slice discovery, selection, and connection processes. This mediator receives service information from WTRUs, determines appropriate slice instances based on service requirements and subscriber data, and facilitates connections without requiring complex logic in end devices. The control node centralizes the complexity of slice management.
Solution Approach 2:
The system implements feedback mechanisms where the network control node continuously monitors service information, slice availability, and connection status. Based on this feedback, the control node dynamically adjusts slice selection and provides real-time updates to WTRUs, enabling adaptive slice management that reduces complexity through automated decision-making based on current network state.
Data Source
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AI summary
A WTRU sends a registration request to the RAN, receives information from a network control entity that is to serve the WTRU for the service and sends a connection establishment request associated with the service to the network control entity, wherein the connection establishment request indicates a target network slice associated with the service, and wherein the target network slice is selected by the WTRU based on at least the network slice selection policy information.