Cell Reselection With Network Slice Filtering for 5G Terminals
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Solution Overview
Problem
Inefficient cell reselection in 5G wireless communications networks leads to ineffective connection attempts due to terminal devices selecting cells that do not support the required network slices, resulting in increased signaling overheads.
Innovation Solution
Incorporating network slice identifiers into cell reselection information sent by the radio access network device to the terminal device, allowing it to perform reselection based on supported network slices and reducing the likelihood of selecting unsuitable cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If terminal device performs cell reselection based only on signal quality, then cell reselection speed is improved, but cell reselection accuracy deteriorates (terminal may select cell that does not support required network slice)
Solution Approach 1:
The network side performs preliminary action by pre-configuring cell reselection information including network slice support indicators for different cells. This information is provided to the terminal device before reselection occurs, enabling the terminal to quickly filter suitable cells without trial-and-error connections, thus improving both speed and accuracy.
Solution Approach 2:
Cell reselection information acts as an intermediary that carries network slice support indicators. This intermediary provides the terminal device with advance knowledge about which cells support required network slices, eliminating the need for ineffective connection attempts and improving reselection accuracy without sacrificing speed.
2Adaptability or versatility
If terminal device performs ineffective cell reselection to cells not supporting required network slice, then cell reselection flexibility is improved, but signaling overhead increases (due to rejected connection requests)
Solution Approach 1:
The network side performs preliminary action by pre-configuring cell reselection information including network slice support indicators for different cells. This information is provided to the terminal device before reselection occurs, enabling the terminal to quickly filter suitable cells without trial-and-error connections, thus improving both speed and accuracy.
Solution Approach 2:
Cell reselection information acts as an intermediary that carries network slice support indicators. This intermediary provides the terminal device with advance knowledge about which cells support required network slices, eliminating the need for ineffective connection attempts and improving reselection accuracy without sacrificing speed.
Data Source
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AI summary
A cell reselection method and a related device are disclosed. The method includes: generating, by a radio access network device, cell reselection information, where the cell reselection information includes an identifier of at least one carrier frequency and an identifier of a network slice supported by each of the at least one carrier frequency; and sending, by the radio access network device, the cell reselection information to a terminal device, where the cell reselection information is used by the terminal device to perform cell reselection. According to the method in the embodiments of the present invention, when the terminal device performs cell reselection, ineffective cell reselection processes of the terminal device can be reduced, and signaling overheads generated because the terminal device performs ineffective cell reselection are reduced.