Roaming method for a mobile terminal in WLAN, related access controller and access point device

摘要

A roaming method for a mobile terminal in a wireless local area network is disclosed. In the method, a target access point (AP) device receives an access request for roaming from the mobile terminal, and a target access controller (AC) obtains mobility information of the mobile terminal in an original extended service set based on the access request, wherein the mobility information include information of an AP device, an AC and a mobile agent server associated with the mobile terminal. Then the target AC determines whether the roaming for the mobile terminal is an inter-IP subnet roaming or an intra-IP subnet roaming based on the obtained mobility information. The target AC performs mobile IP based handover when the roaming is determined as the inter-IP subnet roaming and performs Inter Access Point Protocol based handover when the roaming is determined as the intra-IP subnet roaming.

主权项

1. A roaming method for a mobile terminal in a wireless local area network including a plurality of extended service sets (ESSes), each of the plurality of ESSes including at least one access controller (AC) and at least two access point (AP) devices, wherein each access controller is operative to configure, control and manage at least one AP device, the roaming method comprising:
a target AP device receiving an access request for roaming from the mobile terminal; a target AC to which the target AP device belongs obtaining mobility information of the mobile terminal in an original ESS based on the access request, wherein the mobility information includes information of an AP device, an AC and a mobile agent server associated with the mobile terminal; the target AC determining whether the roaming for the mobile terminal is an inter-IP subnet roaming or an intra-IP subnet roaming based on the obtained mobility information; the target AC performing mobile IP (MIP) based handover when the roaming is determined as the inter-IP subnet roaming; and the target AC performing Inter Access Point Protocol (IAPP) based handover when the roaming is determined as the intra-IP subnet roaming.