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E911 in WLANs Disclosure Number: IPCOM000020186D
Original Publication Date: 2003-Oct-30
Included in the Prior Art Database: 2003-Oct-30

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James E. Womack Niranjan Segal


There is clearly a need, and probably an eventual regulatory demand, for a subscriber unit on a voice capable WLAN to be able to initiate E911 calls and have the call be handled with the utmost priority. Methods provided with implementations of 802.1Q and 802.11e may provide enhanced performance through the use of priority markings; however, they will still compete for bandwidth with the rest of the traffic mix. The approach here is to enhance 802.1Q and 802.11e mechanisms by providing E911 calls with their own Access Category that gets mapped to a particular VLAN ID. Once assigned to a unique VLAN, the local administrator has several ways to configure the system that ensures the call can be moved through the network quickly and reliably.