1. draft-rosen-ecrit-data-only-ea- 00.txt Brian Rosen Neustar (and NENA)

2. Problem: Send an emergency “Call” without media Sensor based alert (smart building, bridge collapse sensing, hazmat spill, medical monitor) There is no human, thus no media But is otherwise the same as a call Not necessarily a pre-established relationship between sender and PSAP Desire to re-use –phonebcp/LoST/Service URNs

3. CAP Messages are appropriate CAP is used for similar uses, and has all the right fields Sensor based alerts often have “updates”, which CAP deals with Generally desire to use CAP for alerts of all kinds But there is no general agreement on CAP transport – We have proposed to use SIP Subscribe/Notify when there is a pre-established relationship, and the expected volume of messages makes subscription overhead worth while

4. CAP with SIP MESSAGE For data-only emergency calls, we propose to use SIP MESSAGE Body of the MESSAGE contains the CAP message Standard SIP MESSAGE Transaction – Some CAP fields copied to appropriate SIP fields Standard CAP Message Treat as INVITE with respect to –phonebcp

5. Open Issue - Location CAP message has “area affected” Encoding properties not quite the same as geopriv –shapes and doesn’t cover civic To treat as an emergency “call”, need location in SIP Geolocation Discussion with OASIS and CAP authors required