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Wireless roaming method and device

A wireless and private network address technology, applied in the network field, can solve problems such as STA service interruption, achieve the effect of avoiding service interruption and improving user experience

Active Publication Date: 2016-05-18
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a wireless roaming method and device to solve the problem that STA services are interrupted due to changes in STA addresses

Method used

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  • Wireless roaming method and device

Examples

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Embodiment Construction

[0048] See figure 1 , is a network architecture diagram in an exemplary embodiment of the present invention, wherein AC1 and AC2 belong to different groups of the same ESS, and can realize layer-3 intercommunication through the MC. In the existing networking environment, both AC1 and AC2 can be used as DHCP servers to assign addresses to STAs, but the network segments where AC1 and AC2 assign addresses are different, for example, the network segment of AC1 is 1.0.0.1, and the network segment of AC2 is 2.0. 0.1. Assume that the STA is under AP1 before roaming, and the DHCP server corresponding to the STA is AC1 / 1.0.0.1. When the STA establishes a session connection with the target server, the assigned private network address is 1.0.0.100, and the gateway is 1.0.0.1. When the STA roams to AP2, the DHCP server corresponding to the STA is AC2 / 2.0.0.1, and its gateway should be 2.0.0.1. Since the original private network address 1.0.0.100 is no longer available, the STA needs to app...

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Abstract

The invention provides a wireless roaming method and a wireless roaming device. The wireless roaming method comprises the steps that: when an STA establishes session connection with a target server through a first private network address, a first AC receives a secondary NAT table item corresponding to the session connection sent by a second AC, and the secondary NAT table item comprises a corresponding relation between the first private network address of the STA and a first public network address; a second public network address is allocated to the session connection according to the first private network address, a new secondary NAT table item is established, and the new secondary NAT table item comprises a corresponding relation between the first private network address of the STA and the second public network address; the second public network address of the STA is sent to an MC when the STA is roaming to the first AC and passes authentication, and the second public network address replaces the first public network address to serve as a primary private network address of a primary NAT table item of the MC; and a data message is forwarded according to the new secondary NAT table item when the data message sent by the STA is received. Therefore, the wireless roaming method and the wireless roaming device can avoid the service interruption problem in STA roaming, and enhance the user experience.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a wireless roaming method and device. Background technique [0002] In WLAN (WirelessLocalAccessNetwork, wireless local area network), the wireless access service provided by multiple APs (AccessPoint, wireless access point) is called ESS (ExtendServiceSet, extended service set), and allows users to use the same authentication information to access the Any AP in the ESS. When a user switches from one AP to another in the ESS, roaming technology needs to be introduced to ensure that the service is not interrupted as much as possible. [0003] During the roaming process, MA (MobilityAgent, roaming agent) can replace AC (AccessController, wireless access controller) to control the wireless access authentication process of AP. All belong to the same ESS. However, in a large-scale network, since MAs in different groups cannot transfer STA (Station, workstation) information...

Claims

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Application Information

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IPC IPC(8): H04L12/755H04L29/12
CPCH04L45/021H04L61/2521H04L61/5014
Inventor 黄智明
Owner NEW H3C TECH CO LTD
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