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Roaming Support (Windows CE 5.0)

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Media Sense, a part of the NDIS technology, supports the detection of a move to a new wireless AP. When a move occurs, Media sense forces a re-authentication to ensure consistent network connectivity. The Windows CE-based wireless client also performs a Dynamic Host Configuration Protocol (DHCP) renewal of the Internet Protocol (IP) address configuration for the wireless network adapter. The IP address configuration does not change within the same ESS. When the wireless client crosses an ESS boundary into a new subnet, the DHCP renewal obtains a new IP address configuration for that subnet.

Through Windows Sockets extensions, network-aware applications are notified of changes in network connectivity and can update their behavior based on these changes. The reconfiguration and move detection minimizes the need for mobile IP when a wireless node roams to another subnet.

See Also

Simulating Roaming | Communication Services and Networking | Windows Sockets | Authenticating 802.1x

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