Transcript Service requirements from 3GPP TS 22.101

Service requirements from
3GPP TS 22.101
SDO Emergency Services Coordination Workshop (ESW06)
Columbia University, New York
October 5-6, 2006
Atle Monrad, Ericsson Mobile Platform
([email protected])
Topics
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3GPP specifications
General requirements
Identification of emergency calls
Interaction with cellular protocols
Location of emergency calls
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3GPP specifications
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IMS emergency is a Rel-7 work item
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Service requirements are specified in 3GPP TS 22.101
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This presentation is an overview of IMS emergency call
requirements in 22.101
The service requirements TS is already frozen (i.e. the
functionality is there)
...but corrections and alignments are still possible
Architecture is specified in 3GPP TS 23.167
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Foreseen freezing early 2007
The TS is under version control, but new features are still possible
Protocol details are in 3GPP TS 24.229
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Work in progress
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General requirements
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Protocol support for emergency services is needed
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Routing to the appropriate service point according to national
regulations
Emergency call without dialing a number must be possible
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The speech service is required, multimedia is FFS (in later
releases)
triggering e.g. by red “emergency” button or car airbag sensor
Terminal supporting voice services shall also support emergency
speech calls
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terminal must support emergency calls with as well as without SIM
/ USIM
support of emergency calls without SIM / USIM in the network is
subject to national regulations
Push-to-talk is not considered a voice service in this respect
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Identification of emergency calls
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The terminal detects emergency number or “IMS emergency call
identifier”
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Emergency call without dialing a number must be possible
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triggering e.g. by red “emergency” button or car airbag sensor
Different emergency services need to be identified
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global default numbers 112 & 911 (even in terminal without SIM / USIM)
global IMS emergency call identifier (even in terminal without SIM / USIM)
HPLMN can define additional e-numbers (but no IMS identifiers) on SIM /
USIM
Serving network can download local e-numbers (but no IMS identifiers)
 Currently only 3GPP cellular protocols (CS + PS domain) support
this requirement
Police, ambulance, fire brigade, marine guard, mountain rescue
Use of the subcategories is subject to national administration
The network must be able to detect emergency calls, but no specific
requirements have been made on how this should happen
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Interaction with the cellular protocol
 CS + PS (IMS) capable mobile should give priority to
CS emergency call
 Local numbers downloaded by the serving network and
HPLMN configured emergency numbers do apply also
to IMS emergency call initiation
 Emergency categories (police, ambulance, etc) do
apply also in IMS
 No means to configure local or HPLMN IMS
emergency call identifiers is needed
 The handling of dialled numbers versus dial-string may
need further clarifications.
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Location of emergency calls
 Location of emergency calls must be supported,
applicability is subject to national regulations
 Locating emergency calls overrides subscribers privacy
request
 Based on local regulation, the network controls this
privacy override, as long as the PSAP and the
emergency service authorities need it
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