Dual Wi-Fi Path Handover for Continuous AP Scanning
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Solution Overview
Problem
Wi-Fi handover processes in mobile terminals are prolonged due to full channel scanning, which disrupts ongoing services and affects user experience.
Innovation Solution
Implementing a mobile terminal with dual band dual concurrent capability, allowing simultaneous Wi-Fi scanning and service execution on separate paths, enabling seamless handover without service disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full channel scanning is performed to find a better AP, then handover reliability is improved, but handover time increases and service continuity is disrupted
Solution Approach 1:
The mobile terminal is divided into two independent Wi-Fi paths (first Wi-Fi path and second Wi-Fi path), allowing scanning operations to be performed on one path while service operations continue on the other path. This segmentation enables parallel execution of scanning and service, eliminating the time loss associated with sequential operations.
Solution Approach 2:
The mobile terminal performs Wi-Fi scanning in advance through the idle Wi-Fi path before the handover is triggered. By pre-scanning and identifying candidate APs while the other path is still connected, the terminal prepares handover information beforehand, reducing the actual handover execution time and minimizing service disruption.
2Measurement precision
If full channel scanning is performed to ensure reliable handover, then measurement precision is improved, but service continuity is disrupted
Solution Approach 1:
The terminal separates scanning functions and service functions into different Wi-Fi paths. The first Wi-Fi path is dedicated to scanning operations while the second Wi-Fi path maintains service continuity, or vice versa. This functional segmentation allows high-precision scanning to be performed without interrupting ongoing services.
Solution Approach 2:
The idle Wi-Fi path acts as an intermediary for performing scanning operations. By using the idle path as a mediator, the terminal can conduct comprehensive channel scanning and AP detection without directly affecting the active service path, thus maintaining service continuity while achieving precise measurements.
3Productivity
If dual band dual concurrent capability is used to perform scanning and service simultaneously, then productivity is improved, but device complexity increases
Solution Approach 1:
Each Wi-Fi path is designed to be multi-functional, capable of performing both scanning operations and service operations independently. This universality allows the terminal to achieve high productivity through parallel operations while managing complexity by reusing the same hardware components for multiple functions across different paths.
Data Source
AI summary
This application provides a handover method and an apparatus. The handover method is applied to a mobile terminal. The mobile terminal supports a synchronous dual band dual concurrent capability, and the mobile terminal has a first Wi-Fi path and a second Wi-Fi path. The handover method includes: The mobile terminal accesses a target AP through the first Wi-Fi path, and performs a Wi-Fi service through the first Wi-Fi path. If the first Wi-Fi path meets a preset handover condition, the mobile terminal performs Wi-Fi scanning on a surrounding candidate AP through the second Wi-Fi path in an idle state to obtain a first scanning result. The mobile terminal accesses, based on the first scanning result, the candidate AP through the second Wi-Fi path, and is handed over from performing the Wi-Fi service through the first Wi-Fi path to performing the Wi-Fi service through the second Wi-Fi path.