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IEEE 802.11 Early Warning Provision

IEEE 802.11 Early Warning Provision. Authors:. Date: 2007-11-01. Abstract. This submission is based on a presentation for the 3 rd SDO Emergency Services Workshop, Brussels, Belgium, 30 th October – 1 st November 2007. Emergency Alert System (EAS).

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IEEE 802.11 Early Warning Provision

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  1. IEEE 802.11 Early Warning Provision Authors: Date: 2007-11-01 Stephen McCann, Nokia Siemens Networks

  2. Abstract This submission is based on a presentation for the 3rd SDO Emergency Services Workshop, Brussels, Belgium, 30th October – 1st November 2007. Stephen McCann, Nokia Siemens Networks

  3. Emergency Alert System (EAS) http://wonkette.com/politics/television/emergency-alert-system-actually-used-183830.php Stephen McCann, Nokia Siemens Networks

  4. Background • In the event of an emergency situation arising, various regional entities will require to notify users utilising any available communications systems at their disposal. It is likely that legislation will mandate this requirement for any communication system, be it VoIP, Text, Video, FAX, Email etc. • The wireless technology underpinning the communications media will be not be of a concern to the entities mentioned above. Stephen McCann, Nokia Siemens Networks

  5. Why make changes to IEEE 802.11? • The technical problem to be solved, is that the network edge elements (e.g. an IEEE 802.11 Access Point), has to signal to the user in a potentially unsolicited manner. • Within a cellular system, an allocated user channel would be interrupted by an emergency alert message. • Most of this service will be terminal based software, but indication of an alert (push) from the network, can be simply implemented within IEEE 802.11 with the addition of a simple flag. Stephen McCann, Nokia Siemens Networks

  6. Idle Situation • The AP does not have any knowledge of the users existence within the hotspot. Upon reception of a centralised emergency alert notification, the network edge element would then broadcast a signalling frame with a special flag set to indicate that an emergency alert is ready to be delivered. • The terminal/user can then retrieve the alert in any way it wishes, (even through a third party device). • It is likely that the reception of the alert within the terminal will trigger some alert, be it a ring tone, video display wakeup, vibration etc. • Message format can be based on EXDL/CAP Stephen McCann, Nokia Siemens Networks

  7. Operational Situation • For a current session, then the network can interrupt this session, using the same methodology as stated above for a cellular system. Stephen McCann, Nokia Siemens Networks

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