BSS-switch module for wireless devices

A technology of equipment and mobile equipment, applied in the field of communication, can solve problems such as dialogue data spoofing

Inactive Publication Date: 2006-09-06
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this scheme provides seamless handover of wireless devices from the old access point to the new access point, the session data spoofing and master-then-slave clock synchronization are fundamentally autonomous from conventional networking protocols. principle is the opposite

Method used

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  • BSS-switch module for wireless devices
  • BSS-switch module for wireless devices
  • BSS-switch module for wireless devices

Examples

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Embodiment Construction

[0011] In the following description, the IEEE 802.11a / b / g wireless device communication protocol is used as an example of a wireless communication system, but those of ordinary skill in the art will recognize that the principles of the invention are not limited to the specific examples provided.

[0012] FIG. 1 shows an exemplary block diagram of a wireless network 100 in accordance with the present invention. The example network 100 includes three access points AP 120 with which the mobile device M 110 communicates to communicate data over the network and / or to other networks. Also included in the example network 100 is an optional handover assistant SA 130, the function of which will be explained below. The mobile device M communicates with the access point AP through wireless communication, and the AP and the SA device can communicate with each other through wireless or wired communication according to a specific network environment.

[0013] Each mobile device M is associ...

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Abstract

An access point (AP) (120a) manages and coordinates handoffs of mobile devices (110) to other access points (120b, c, d). The access point (120a) monitors the quality of its communication link with the mobile device (110). When the access point (120a) determines that quality is degrading, or when the access point (120a) determines that its traffic volume is too high, or when another handover-triggering event (202) occurs, the access point (120a) Other access points (120b, c, d) in its vicinity send transfer requests. If another access point can accept the mobile device (110), it notifies the requesting access point (120a) that it is available. The requesting access point (120a) selects among available access points (120b, c, d) and notifies the mobile device (110) to switch to the selected access point. This notification provided to the mobile device (110) includes appropriate attributes of the selected access point so that the mobile device (110) can perform a handover to this selected access point with minimal overhead or latency. The requesting access point (120a) maintains a message buffer during this handover process so that any data lost during the handover can be easily recovered.

Description

technical field [0001] The present invention relates to the field of communications, and in particular to a method and system for managing a wireless network whose wireless devices have multiple Basic Service Sets (BSS) in an Extended Service Set (ESS) roam freely. Background technique [0002] Mobile devices such as laptop computers, personal digital assistants (PDAs), cell phones, voice over IP (VOIP) phones, etc. are becoming increasingly popular, and standards and protocols such as IEEE802.11 and Bluetooth (Bluetooth) have been established , to facilitate the networking of such devices to form a wireless local area network (WLAN). [0003] Conventionally, a mobile device establishes a connection through an access point (AP) on a WLAN and monitors the quality of the connection. When the quality of the connection becomes critical, such as occurs when the mobile device moves away from the access point, the mobile device searches the network for another access point with p...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04L12/28H04L12/56H04W36/08H04W36/12H04W48/08H04W48/16H04W48/20H04W88/08
CPCH04W36/30H04L12/24H04L12/2602H04L41/00H04L41/12H04L43/00H04L43/0823H04L43/0894H04W28/14H04W88/08H04W92/10H04W92/20H04W48/20H04W36/08
InventorP·加格
OwnerNXP BV