Self-adapting triggering method for establishing new link for WLAN seamless switch

A technology of seamless switching and new links, applied in wireless communication, electrical components, network topology, etc., can solve the problems of long communication interruption time of upper-layer services and no consideration of the moving speed of mobile nodes, and achieve reasonable and efficient use, reasonable and efficient use. The effect of network resources

Active Publication Date: 2010-06-02
北京地平线轨道技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This mechanism does not consider the moving speed of the mobile node, so it may happen that the connection with the network is interrupted before the handover is completed, so that the upper layer business will suffer a long communication interruption time

Method used

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  • Self-adapting triggering method for establishing new link for WLAN seamless switch
  • Self-adapting triggering method for establishing new link for WLAN seamless switch
  • Self-adapting triggering method for establishing new link for WLAN seamless switch

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Experimental program
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Embodiment 1

[0031] Embodiment 1: as figure 1 as shown,

[0032] In the WLAN handover in this patent, the handover target network is recorded as the target network, which generally refers to various access networks that overlap with the WLAN coverage to a certain extent. figure 1 It is a schematic diagram of the movement of the mobile body. Ring 1 is the adaptive trigger boundary for establishing a new link. The receiving threshold of WLAN in this ring is Th 0 . If the received signal strength of the mobile is lower than this threshold, it will trigger the establishment of a new link to the target network. Ring 2 is the call drop threshold, and the received signal strength of WLAN in this ring is Th 1 , if the received signal strength of the mobile body is lower than the fixed threshold, the mobile body will disconnect from the WLAN network. Ring 3 is the coverage area of ​​the target network. V is the moving speed of the moving body (assuming that the moving body moves in a straigh...

Embodiment 2

[0047] If the mobile body is moving, if it can obtain its current location information and the location information of the AP in the current WLAN through GPS or other technologies, it can adaptively trigger the establishment of a new link based on location according to the distance from the AP. image 3 Schematic diagram of the motion of the moving body.

[0048] Ring 1 is the adaptive trigger boundary for establishing a new link, and the distance from the center is r 0 , if the moving body is more than this distance away from the AP, it will trigger the establishment of a new link to the target network. (x 1 ,y 1 ) is the coordinates of the moving body at this time. Ring 2 is the call drop boundary, the distance from the center is r 1 , if the distance between the mobile body and the AP exceeds this distance, the mobile body will disconnect from the WLAN network. (x 0 ,y 0 ) is the coordinate of AP. Ring 3 is the coverage area of ​​the target network. V is the moving...

Embodiment 3

[0056] When a WLAN is deployed in a square covered by a CDMA network, people can use the WLAN as much as possible (due to its higher data transmission rate and lower usage costs). When moving, in order to maintain the continuity of the business carried out in the WLAN before, it is necessary to switch to the CDMA network in time, but in order to minimize the time of using the CDMA network and reduce the corresponding costs, the mobile terminal holder must be in the appropriate Time to trigger the establishment of the CDMA link. In this way, a reasonable trigger threshold can be set according to the current movement speed. When the signal strength received from the WLAN is lower than this threshold, the establishment of a CDMA link is initiated immediately. This can not only achieve the purpose of seamless switching, but also minimize the time of using CDMA.

[0057] The present invention proposes a general principle of setting the trigger threshold for triggering the establi...

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Abstract

The invention relates to a self-adaption triggering method for establishing a new link during WLAN seamless switching. In a scene that WLAN is switched to a target network, the invention can set a received signal intensity threshold for establishing the new link in the target network in a self-adaptive way according to the specific movement state of a moving body, and therefore, the invention canrealize the seamless switching of the WLAN to the target network, also can occupy two communication links simultaneously within shortest time, thus being capable of using network resource more reasonably and efficiently.

Description

technical field [0001] The invention relates to an adaptive triggering method for establishing a new link in WLAN seamless switching, and belongs to the technical field. Background technique [0002] In recent years, with the increasing deployment of WLAN hotspots and the vigorous development of various wireless communication technologies, the seamless handover between WLAN adjacent networks has become a research hotspot, but whether it is horizontal handover between homogeneous WLANs or WLAN and The purpose of vertical handover between overlapping heterogeneous networks is to minimize the handover delay and the resulting packet loss. During the handover process, a very important issue is when to trigger the establishment of a new link. Various mechanisms have been proposed on this issue, some using received signal strength [Novel MAC Layer Handoff Schemes for IEEE 802.11 Wireless LANsChintala, V.M.; Qing-An Zeng; Wireless Communications and Networking Conference, 2007. WCN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/06H04W84/12
Inventor 张宏科周华春延志伟张思东
Owner 北京地平线轨道技术有限公司
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