Network Slice Selection for Faster Wireless Session Establishment
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Solution Overview
Problem
In existing network slicing technologies, session establishment requests can fail when a terminal device attempts to access a network slice not supported by the current cell or network, leading to resource wastage and delays.
Innovation Solution
A terminal device processes session establishment requests based on information about supported and allowed network slices, and sends appropriate indication information to a core network device to facilitate network slice remapping, fallback, cell redirection, or service remapping to reduce resource overheads and delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device sends a session establishment request without checking network slice compatibility, then the session establishment process is simple and fast, but resource waste occurs due to failed connection attempts
Solution Approach 1:
The terminal device performs preliminary checks by obtaining and comparing network slice information (supported network slices from the cell and allowed network slices from the network) before sending the session establishment request. This preliminary action filters out incompatible network slices in advance, preventing wasted transmission resources while maintaining a fast session establishment process for compatible slices.
2Loss of energy
If the terminal device checks network slice compatibility before session establishment, then resource waste is reduced, but the process becomes more complex and time-consuming
Solution Approach 1:
The terminal device obtains supported network slice information from the cell and allowed network slice information from the network in advance, storing them for quick comparison. When a session establishment request is needed, the terminal simply compares the requested network slice against these pre-obtained lists, reducing the complexity of the checking process while still achieving resource waste reduction.
3Loss of energy
If the terminal device obtains detailed network slice information before session establishment, then resource waste is minimized, but access delay increases due to additional information gathering
Solution Approach 1:
The terminal device obtains supported network slice information from cell system information and allowed network slice information from network signaling during normal network operations, storing this information for future use. When session establishment is needed, the terminal performs a quick comparison against these pre-stored lists, minimizing access delay while maintaining resource efficiency.
Solution Approach 2:
The terminal device maintains local copies of network slice information (supported slices and allowed slices) specific to its current cell and network context. This local quality approach allows the terminal to perform rapid local comparisons without repeatedly querying the network, reducing access delay while ensuring accurate resource utilization checks.
Data Source
AI summary
This application provides a communication method and a communication apparatus where a terminal device receives information about supported and allowed network slices and processes a session establishment request based on this information to optimize network efficiency and service delivery. The terminal device receives first information that indicates at least one supported network slice, which includes a network slice supported by at least a first cell or a network slice supported by a first access device. The first cell includes a cell currently accessed by the terminal device, and the first access device includes an access device currently accessed by the terminal device; the terminal device receives second information that indicates at least one allowed network slice; and the terminal device processes a session establishment request of a first service based on the first information and the second information to reduce a waste of resources.