Network Slice Redirection in 5G RAN Devices
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Solution Overview
Problem
In existing 5G wireless communication systems, different cells may have varying network slice support capabilities, leading to unstable network slice access efficiency for terminal devices, as they may not be able to access required network slices in all cells.
Innovation Solution
A network slice redirection method is implemented, where a Radio Access Network (RAN) device receives a request for a network slice, performs redirection decision-making, and notifies the terminal device with redirection information, allowing it to reinitiate the request based on remapped network slices or terminal device redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all cells in a large physical area are assumed to have the same network slice support capability, then the system configuration is simplified, but the network slice access efficiency becomes unstable when terminal devices move between cells with actually different capabilities
Solution Approach 1:
The patent applies local quality by allowing different cells to have different network slice support capabilities. Each cell is configured with specific network slice information independently, rather than assuming uniformity across the entire tracking area. This enables terminal devices to access appropriate network slices based on the specific cell they are in, improving access reliability while maintaining manageable complexity through localized configuration.
Solution Approach 2:
The patent implements preliminary action by pre-configuring network slice information in each cell before terminal devices arrive. The RAN device stores network slice support capabilities and remapping relationships in advance, so when a terminal device requests network slice access, the RAN device can immediately provide appropriate remapping information without real-time computation, thus improving access efficiency.
2Productivity
If network slice remapping information is provided to terminal devices, then network slice access efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential network slice remapping information needed for terminal devices to access network slices efficiently. Instead of transmitting complete network slice configurations or all possible remapping relationships, the system sends only the specific remapping information relevant to the terminal device's current cell and requested slices, reducing signaling overhead while maintaining access efficiency.
Solution Approach 2:
The patent uses copying by providing terminal devices with simplified remapping information that references pre-configured network slice relationships. The RAN device stores complete remapping mappings and provides terminal devices with compact references or simplified remapping data that points to the actual network slice configurations, reducing the amount of signaling data transmitted while enabling efficient network slice access.
Data Source
AI summary
A radio access network (RAN) device receives a first message, where the first message includes identifiers of one or more first network slices, and the identifiers of the one or more first network slices are included in a non-access stratum (NAS) request message sent by a terminal device to a core network (CN) device by using the RAN device. The RAN device sends a second message including network slice redirection information to the terminal device, where the network slice redirection information includes at least one of network slice remapping information or terminal device redirection information, and the network slice redirection information is obtained after the RAN device performs network slice redirection decision-making on the one or more first network slices.