RAN Slice Selection via Broadcast Feedback
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Solution Overview
Problem
In communication systems, when a UE is registered in a network, it may desire to use a specific RAN slice for communication, but the cell selected by the UE may not support this slice, leading to registration denial and potential quality of service (QoS) issues.
Innovation Solution
The communication system determines whether the base station supports the desired RAN slice, and if not, the UE is registered using an alternative slice that the base station does support, ensuring QoS reservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE selects a cell based on signal strength or availability, then the UE can quickly establish connection, but the selected cell may not support the desired RAN slice, leading to registration denial
Solution Approach 1:
The base station broadcasts slice support information in advance before the UE attempts registration. This preliminary disclosure of capability information allows the UE to make informed cell selection decisions without undergoing trial-and-error registration processes, thereby ensuring both quick connection and reliable slice support from the outset
Solution Approach 2:
The system implements a feedback mechanism where the base station provides slice support information to the UE during cell selection. This feedback loop enables the UE to adjust its selection criteria based on actual slice availability, resolving the contradiction between fast connection and reliable slice guarantee by continuously informing the UE of supported slices
2Stability of the object's composition
If the UE is forced to register on a cell that does not support the desired slice, then the UE can maintain connection, but the QoS cannot be reserved and communication quality deteriorates
Solution Approach 1:
The system applies local quality by providing slice-specific information for each cell individually. Instead of a uniform registration process, each cell broadcasts its specific slice support characteristics, allowing the UE to match its slice requirements with the appropriate local cell properties, thereby ensuring both stable connection and QoS reservation
Solution Approach 2:
The registration process incorporates parameter changes by dynamically adjusting selection criteria based on slice support information. When the UE detects that a cell does not support the desired slice, it can change its selection parameters to choose an alternative cell that does support the required slice, maintaining both connection stability and QoS reservation
3Measurement precision
If the base station broadcasts detailed slice support information, then the UE can make accurate cell selection, but the broadcast overhead increases
Solution Approach 1:
The system extracts only the essential slice support information needed for UE decision-making, filtering out unnecessary details. By taking out only the critical parameters (such as supported slice identifiers and availability status) rather than broadcasting complete configuration data, the system achieves accurate slice detection while minimizing broadcast overhead
Solution Approach 2:
The broadcast slice information is designed to be lightweight and transient, updated only when necessary (e.g., when slice configuration changes). This approach uses minimal information carrying capacity, similar to disposable objects, achieving sufficient accuracy for UE selection without the burden of extensive, persistent broadcasting
Data Source
AI summary
A communication terminal apparatus in a communication system, which includes the communication terminal apparatus and a base station apparatus configured to perform radio communication with the communication terminal apparatus, is configured to receive slice information on a slice of a Radio Access Network (RAN) from the base station apparatus.