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
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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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