NPN System Information Validation to Reduce Handover Packet Loss
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Solution Overview
Problem
Existing technologies face challenges in ensuring seamless data forwarding with minimal packet loss during handovers between different networks, particularly in standalone NPN scenarios, leading to service discontinuity.
Innovation Solution
A method for verifying the validity of system information by comparing NPN identification and association information, allowing the terminal device to determine the validity of received system information, and ensuring consistent data forwarding across networks using shared-access network devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data forwarding is performed between networks during handover, then service continuity is improved, but packet loss occurs due to network information invalidity
Solution Approach 1:
The terminal device performs preliminary validation of system information before handover by comparing NPN identification information and association information (value tag, area scope, system information area ID). This preliminary action ensures that only valid system information is used for data forwarding, preventing packet loss while maintaining service continuity.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device continuously monitors and validates system information during handover processes. By comparing current system information with previously stored information using NPN identification and association criteria, the device provides feedback on information validity, enabling dynamic adjustment of data forwarding operations to minimize packet loss.
2Loss of substance
If system information is validated during handover, then packet loss is reduced, but processing complexity increases
Solution Approach 1:
The system information validation process is segmented into distinct components: NPN identification information extraction, association information comparison (value tag, area scope, system information area ID), and validity determination. This segmentation allows the terminal device to perform validation in modular steps, reducing processing complexity while ensuring comprehensive verification to minimize packet loss.
3Measurement precision
If NPN identification information is compared for system information validity, then data forwarding accuracy is improved, but information processing time increases
Solution Approach 1:
The patent extracts only the essential NPN identification information and key association information elements (value tag, area scope, system information area ID) from the complete system information for comparison purposes. This extraction approach maintains data forwarding accuracy by focusing on critical validation parameters while reducing information processing time by eliminating unnecessary comparison operations.
Data Source
AI summary
A data transmission method, a communications device, and a communications system are provided for wireless communications. A terminal device receives a first system information broadcast by a radio access network device. The first system information includes a non-public network (NPN), identification information list and a first association information. The NPN identification information list includes at least one NPN identification information and determines a second system information is valid when first NPN identification information in the NPN identification information list is identical to second NPN identification information stored in the terminal device, and the first association information is identical to a second association information stored in the terminal device. The second system information can include the second NPN identification information and the second association information.