Abstract: Apparatus for transmitting a signal from a periphery device to an Internet through a wireless local area network is disclosed herein, the apparatus including the following devices. Firstly, the converting device is used to transmit the signal between the local area network and the Internet using pack exchanging. Thus the frame is briefer than that used in the prior art. The frame is transmitted between the periphery device and the local area network with the frame of a brief structure. Second, the converting device is used as the bridge between the wireless local area network and the local area network. Third, the transceiving device is used to transmit the signal to the converting device through the wireless local area network. The transmitting periphery device is used to transmit a first output frame to the transceiving device. Thus the first output frame is sent to the converting device through the wireless local area network.

Abstract: A method involves in integrating the communication mechanisms of IAPP and mobile IP is provided for allowing a mobile station to roam among various APs in different IP subnets. When a mobile station roams to a new IP subnet, it will issue a reassociation request to an Access Point A in the new IP subnet. In response to the reassociation request, the Access Point A will need the IP address of the previous Access Point B in the previous IP subnet to send the handoff request to the Access Point B. So, the Access Point A can find the IP address of the Access Point B via the communication mechanism of mobile IP of IP layer and then send the handoff request frame to the Access Point B. In turn, upon receiving the handoff request frame, the Access Point B deletes the record of the mobile station in the association table and then sends the handoff response frame back to the Access Point A via the communication mechanism of mobile IR. The unicast handoff response frame will be forwarded to the Access Point A.