Slice-Aware Cell Selection Using MIB and SIB Filtering
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Solution Overview
Problem
Existing communication systems lack a mechanism for terminal devices to effectively and quickly select or reselect cells based on network slices, leading to inefficient access and frequent handovers.
Innovation Solution
A cell selection or reselection method that involves a terminal device receiving a MIB message from a cell, determining it as a candidate access cell based on slice information, and reading a SIB message to select a supported slice for access, or a network device sending a system message with slice information for the terminal device to make this selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal device performs cell selection or reselection without considering network slice information, then the cell selection process is simple, but the terminal device cannot effectively and quickly access the cell
Solution Approach 1:
The network device pre-configures slice information in system messages (MIB and SIB) before terminal devices perform cell selection. This allows terminals to proactively identify and select cells that support their required slices, eliminating the need for complex post-selection slice compatibility checks and enabling faster effective access.
Solution Approach 2:
Slice information acts as an intermediary parameter that bridges the terminal device's service requirements and the cell's capabilities. By incorporating slice identifiers and support indicators into system messages, the patent enables terminals to make informed cell selection decisions without requiring complex direct negotiation or trial-and-error access attempts.
2Loss of information
If terminal device reads detailed SIB message for every candidate cell, then the terminal device can obtain complete slice information, but the access time increases
Solution Approach 1:
The system message is segmented into two parts: MIB message containing essential cell identification and basic slice support indicators for rapid initial filtering, and SIB message containing detailed slice information for subsequent verification. This segmentation allows terminals to quickly eliminate unsuitable cells using MIB information without reading complete SIB messages for all candidates, significantly reducing access time while maintaining information completeness.
Solution Approach 2:
The patent implements partial reading of system messages by allowing terminals to first read the essential MIB message for initial cell filtering, then selectively read the SIB message only for cells that pass the initial filter and are potential candidates. This partial action approach avoids the excessive time cost of reading complete SIB messages for all candidate cells while ensuring sufficient slice information is obtained for final selection.
Data Source
AI summary
Embodiments of the present disclosure disclose a cell selection or reselection method and a device, to resolve a problem that a terminal device cannot effectively and rapidly access a cell without taking a slice of the cell into consideration when performing cell selection or reselection. The method may be performed by a terminal device, and includes: receiving a MIB message from a cell; in a case of determining, based on the MIB message, that the cell can be a candidate access cell, reading a SIB message of the cell, where the SIB message includes slice information of the cell; and selecting one slice from slices of the cell to access based on slice information supported by the terminal device and the slice information of the cell.