Subscriber terminal based fast skip zone switching method and equipment

Abstract

A user terminal-based fast land-off method and the equipment; the user terminal establishes the neighboring group list, among which the possible neighboring access point is divided into one or more groups. As the land-off is needed, the user terminal alternatively carries out a plurality of detective sub-phases before disconnected as per the neighboring group list, while the existing service access point is not disconnected. During each detective sub-stage before disconnection, the active detection mode is used to detect the signal quality of the neighboring access point in a group. The user terminal selectively executes the land off according to the signal quality for the detected neighboring access point. Based on the overlapped channel scanning, the user terminal can obtain the neighboring access point-related information or on the strength of the neighboring access point-related information from the service access point, the neighboring group list can be established. The neighboring access points in the same group work on the same channel and during each detective sub-phase before disconnection, the single broadcasting detection request can be used to detect a group of the neighboring access points.

Description

Technical field [0001] The present invention generally relates to wireless communication technology, and more specifically, to a method for quickly performing link-layer handover so that when a user terminal (STA) moves away from its currently associated access point (AP) to another A method and device for minimizing the communication interruption period that occurs in the neighboring APs. Background technique [0002] The IEEE 802.11 standard defines two working modes: ad hoc mode and structured mode (infrastructure mode). In ad hoc mode, no AP is required, and two or more STAs can recognize each other and establish point-to-point communication. In structured mode, there is at least one AP. The AP and one or more STAs supported by it are called a basic service set (Basic Service Set, BSS), which roughly corresponds to a cell in a cellular network environment. The STA uses the AP to access the resources of the wired network and communicate with other STAs in the same BSS. Dependi...

AI Technical Summary

Problems solved by technology

However, with the standard 802.11 protocol, the handover procedure cannot meet the requirements of real-time interactive applications due to the following two reasons:

[0007] (1) The communication interruption period is too long (about 500ms);

[0008] (2) Long communication interruptions lead to packet loss

In a large-scale wireless network, it is difficult to synchronize all APs and STAs with high precision

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