ECRIT B. Rosen
Internet-Draft NeuStar
Intended status: Standards Track H. Tschofenig
Expires: April 25, 2013 Nokia Siemens Networks
R. Marshall
TeleCommunication Systems, Inc.
October 22, 2012
Additional Data related to an Emergency Call
draft-ietf-ecrit-additional-data-05.txt
Abstract
When an emergency call is sent to a Public Safety Answering Point
(PSAP), the device that sends it, as well as any service provider in
the path of the call, or access network through which the call
originated may have information about the call which the PSAP may be
able to use. This document describes an XML data structure to
contains such data and a Uniform Resource Identifier (URI) for
conveying the data to the PSAP. The URI may point to either an
external resource, or the body of the SIP message.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on April 25, 2013.
Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
Rosen, et al. Expires April 25, 2013 [Page 1]
Internet-Draft Additional Call Data October 2012
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Call-Info Specification . . . . . . . . . . . . . . . . . . . 7
4. Data Provider Information . . . . . . . . . . . . . . . . . . 9
4.1. Data Provider String . . . . . . . . . . . . . . . . . . . 9
4.2. Data Provider ID . . . . . . . . . . . . . . . . . . . . . 9
4.3. Data Provider ID Series . . . . . . . . . . . . . . . . . 10
4.4. Type of Data Provider . . . . . . . . . . . . . . . . . . 10
4.5. Data Provider Contact URI . . . . . . . . . . . . . . . . 11
4.6. Data Provider Languages(s) Supported . . . . . . . . . . . 12
4.7. xCard of Data Provider . . . . . . . . . . . . . . . . . . 12
4.8. Subcontractor Principal . . . . . . . . . . . . . . . . . 13
4.9. Subcontractor Priority . . . . . . . . . . . . . . . . . . 14
4.10. addDataProviderInfo XML Schema . . . . . . . . . . . . . . 15
5. Service Information . . . . . . . . . . . . . . . . . . . . . 16
5.1. Service Environment . . . . . . . . . . . . . . . . . . . 16
5.2. Service Delivered by Provider to End User . . . . . . . . 16
5.3. Service Mobility Environment . . . . . . . . . . . . . . . 18
5.4. addCallSvcInfo XML Schema . . . . . . . . . . . . . . . . 19
6. Device Information . . . . . . . . . . . . . . . . . . . . . . 20
6.1. Device Classification . . . . . . . . . . . . . . . . . . 20
6.2. Device Manufacturer . . . . . . . . . . . . . . . . . . . 22
6.3. Device Model Number . . . . . . . . . . . . . . . . . . . 22
6.4. Unique Device Identifier . . . . . . . . . . . . . . . . . 23
6.5. Type of Device Identifier . . . . . . . . . . . . . . . . 23
6.6. Device/Service Specific Additional Data Structure . . . . 24
6.7. Device/Service Specific Additional Data Structure Type . . 25
6.8. addDataDevInfo XML Schema . . . . . . . . . . . . . . . . 26
7. Owner/Subscriber Information . . . . . . . . . . . . . . . . . 27
7.1. xCard for Subscriber's Data . . . . . . . . . . . . . . . 27
7.2. addCallSub XML Schema . . . . . . . . . . . . . . . . . . 28
8. Comment . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1. Comment . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.2. Comment XML Schema . . . . . . . . . . . . . . . . . . . . 30
9. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10. Main Telephone Number . . . . . . . . . . . . . . . . . . . . 32
11. Security Considerations . . . . . . . . . . . . . . . . . . . 33
12. Privacy Considerations . . . . . . . . . . . . . . . . . . . . 34
Rosen, et al. Expires April 25, 2013 [Page 2]
Internet-Draft Additional Call Data October 2012
13. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 35
13.1. Registry creation . . . . . . . . . . . . . . . . . . . . 35
13.1.1. Additional Call Data Blocks Registry . . . . . . . . 35
13.1.2. Service Provider Type . . . . . . . . . . . . . . . . 35
13.1.3. Additional Call Data Blocks Registry . . . . . . . . 36
13.1.4. Additional Call Data Service Delivered Registry . . . 37
13.1.5. Additional Call Data Device Classification
Registry . . . . . . . . . . . . . . . . . . . . . . 38
13.1.6. Additional Call Data Device ID Type Registry . . . . 39
13.2. 'emergencyCallData' Purpose Parameter Value . . . . . . . 39
13.3. URN Sub-Namespace Registration for provided-by
Registry Entry . . . . . . . . . . . . . . . . . . . . . . 39
13.4. MIME Registrations . . . . . . . . . . . . . . . . . . . . 40
13.4.1. MIME Content-type Registration for
'application/addDataProviderInfo+xml' . . . . . . . . 40
13.4.2. MIME Content-type Registration for
'application/addCallSvcInfo+xml' . . . . . . . . . . 41
13.4.3. MIME Content-type Registration for
'application/addDataDevInfo+xml' . . . . . . . . . . 42
13.4.4. MIME Content-type Registration for
'application/addCallSub+xml' . . . . . . . . . . . . 43
13.4.5. MIME Content-type Registration for
'application/addCallComment+xml' . . . . . . . . . . 45
13.5. URN Sub-Namespace Registration . . . . . . . . . . . . . . 46
13.5.1. Registration for
urn:ietf:params:xml:ns:addDataProviderInfo . . . . . 46
13.5.2. Registration for
urn:ietf:params:xml:ns:addCallSvcInfo . . . . . . . . 47
13.5.3. Registration for
urn:ietf:params:xml:ns:addDataDevInfo . . . . . . . . 47
13.5.4. Registration for urn:ietf:params:xml:ns:addCallSub . 48
13.5.5. Registration for
urn:ietf:params:xml:ns:addCallComment . . . . . . . . 49
13.6. Schema Registrations . . . . . . . . . . . . . . . . . . . 50
13.7. VCard Parameter Value Registration . . . . . . . . . . . . 51
14. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 52
15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 53
15.1. Normative References . . . . . . . . . . . . . . . . . . . 53
15.2. Informational References . . . . . . . . . . . . . . . . . 53
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 55
Rosen, et al. Expires April 25, 2013 [Page 3]
Internet-Draft Additional Call Data October 2012
1. Introduction
This document extends the basic signaling of an emergency call as
described in [RFC6443] and [I-D.ietf-ecrit-phonebcp] in order to
carry additional data which may be useful to an entity handling the
call. This data is "additional" to the basic signaling used in
processing the call. Four general categories of such data are
defined, for the caller, the location, the call, and the PSAP. An
XML data structure is defined for such data, and a means of conveying
the data by including a Uniform Resource Identifier (URI) in the SIP
signaling which resolves to the data. The data itself may reside on
an external resource, or may be contained within the BODY of the SIP
message.
In general, there are three types of data exchanged:
Data Associated with a Call: While information is carried in the
call setup procedure itself (as part of the SIP headers as well as
in the body of the SIP message), there is additional data known by
the device making the call, or a service provider in the path of
the call including contact data, subscriber data, service data and
device data.
Data Associated with a Location: There may be data that is specific
to the location not available in the location data structure
(PIDF-LO [RFC4119]) itself, such as floor plan, tenant and
building owner contact data, HVAC status, etc.
Data Associated with a Caller: This is personal data about a caller,
such as medical information and emergency contact data.
When an emergency call is sent to a PSAP, while there is a rich set
of data in the SIP message used for the call setup, the device, as
well as any service provider in the path may have even more
information that may be useful for a PSAP. This information may
include the identity and contact information of the service provider,
subscriber identity and contact information, the type of service the
provider offers, what kind of device is being used, etc. Some data
is device or service dependent data. For example, a car telematics
system or service may have crash information. A medical monitoring
device may have sensor data. While the details of the information
may vary by device or service, there needs to be a common way to send
such data to a PSAP.
This document focuses only four types of additional data associated
with an emergent call and a mechanism for transporting it in an
existing SIP header field, the Call-Info header, which is specified
in Section 20.9 of [RFC3261]. For this purpose a new token, namely
Rosen, et al. Expires April 25, 2013 [Page 4]
Internet-Draft Additional Call Data October 2012
'emergencyCallData' is defined to be carried in the "purpose"
parameter. If the "purpose" parameter is set to 'emergencyCallData'
then the Call-Info header contains a HTTPS URL that points to a
service and data structure with information about the call or is a
CID that allows the data structure itself to be placed in the body of
the message. Section 9 shows a SIP INVITE example containing such a
Call-Info header using the purpose parameter.
Besides a service provider in the path of a call, the access network
(which in the IETF emergency call architecture provides location in
the form of a PIDF-LO [RFC4119]) also has similar information that
may be valuable to the PSAP. This information is not specific to the
location itsef, but rather would provide descriptive information
having to do with the immediate circumstances about the provision of
the location (who the access network is, how to contact that entity,
what kind of service the access network provides, possibly subscriber
data, etc.). This data is similar in nearly every respect with the
data known by services providers in the path of the call. For this
reason, this document describes a "provided-by" namespace per
[RFC4119] for passing information known to the access network.
The data is defined as a series of "blocks" that represent a class of
information. Each of the blocks is a MIME type, and an extensible
set of these types constitute the data structure. A registry is
defined to list the block types that may be included.
The data structure contains an element which itself is a URI that has
device or service dependent data. Thus the common Additional Data
about a Call defined by this document contains a 'hook', in the form
of a URI, for a device or service dependent data structure.
Rosen, et al. Expires April 25, 2013 [Page 5]
Internet-Draft Additional Call Data October 2012
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
In the data block definitions, the "Use:" values are specified as one
of:
Mandatory which means they MUST be present in the data structure.
Conditional which means they MUST be present unless the specified
condition is met, in which case the they MAY be present.
Optional which means they MAY be present.
Rosen, et al. Expires April 25, 2013 [Page 6]
Internet-Draft Additional Call Data October 2012
3. Call-Info Specification
The Additional Data about a Call is information specific to a call
known by the device that sends it or a service provider in the path
of a call or in the access network the call originates in. The
Additional Data about a Call is a set of information blocks. Each
block is a MIME type, and any set of blocks may be included in the
set.
Two mechanisms are provided to transport the data set, namely
1. A URI to the data set MAY be inserted in a SIP INVITE or MESSAGE
transaction with a Call-Info header containing a purpose of
"emergencyCallData". The Call-info header with
purpose='emergencyCallData' MUST only be sent on an emergency
call, which can be ascertained by the presence of an emergency
service urn in a Route header of a SIP message. If the data is
provided by reference, it may be retrieved with an HTTPS Get from
the URI. The URI MUST specify an HTTPS scheme, and TLS
protection for the data MUST be negotiated.
2. The data may be supplied by value in a SIP INVITE or MESSAGE
message. In this case, Content Indirection (CID) [RFC2392] is
used, with the CID URL pointing to the body of the message.
More than one Call-Info header with an emergencyCallData purpose can
be expected, but at least one MUST be provided. The device MUST
provide one if no service provider is in the path of the call. The
device MAY insert one if it uses a service provider. Any service
provider in the path of the call MUST insert its own. For example, a
device, a telematics service provider in the call path, as well as
the mobile carrier handling the call will each provide one. There
may be circumstances where there is a service provider who is unaware
that the call is an emergency call and cannot reasonably be expected
to determine that it is an emergency call. In that case, that
service provider is not expected to provide emergencyCallData.
Note: The access network MAY supply additional data as well. For
this purpose, this document defines a namespace and adds the
namespace to the "provided-by" registry defined by PIDF-LO [RFC4119].
In regions where callers can elect to suppress certain personally
identifying information, the network or PSAP functionality can
inspect privacy flags within the SIP headers to determine what
information may be passed, stored, or displayed to comply with local
policy or law.
Additional data about a call is defined as a series of MIME objects,
Rosen, et al. Expires April 25, 2013 [Page 7]
Internet-Draft Additional Call Data October 2012
each with an XML data structure contained inside. MIME-multipart is
used to enclose the XML documents and the sections below define them.
When additional data is passed by value, the CID URL points one
block. Multiple URIs must be used within a Call-Info header to point
to each of the blocks. When additional data is provided by
reference, the data is retrieved with an HTTP Get operation, which
returns a multi-part MIME header and a set of MIME blocks defined by
this document. A registry of allowed types is created by this
document. Every block MUST be one of the types in the registry.
Rosen, et al. Expires April 25, 2013 [Page 8]
Internet-Draft Additional Call Data October 2012
4. Data Provider Information
This block is intended to be provided by any service provider in the
path of the call or the access network provider. It includes
identification and contact information. This block SHOULD be
provided for every service provider in the path of the call, and the
access network provider. Devices MAY use this block to provide
identifying information. The MIME type is "addDataProviderInfo+xml".
4.1. Data Provider String
Data Element: Data Provider String
Use: Required
XML Element: <DataProviderString>
Description: This is a plain language string suitable for displaying
the name of the service provider that created the additional data
structure. If the device created the structure the value is
identical to the contact header in the SIP INVITE.
Reason for Need: Inform the call taker of the identity of the entity
providing the additional call data structure.
How Used by Call Taker: Allows the call taker to interpret the data
in this structure. The source of the information often influences
how the information is used, believed or verified.
4.2. Data Provider ID
Data Element: Data Provider ID
Use: Conditional. Must be provided if the service provider is
located in a jurisdiction that maintains such ids. Devices are
not required to provide it.
XML Element: <ProviderID>
Rosen, et al. Expires April 25, 2013 [Page 9]
Internet-Draft Additional Call Data October 2012
Description: A jurisdiction specific code for the provider shown in
the <DataProvidedBy> element that created the structure of the
call. This data SHOULD be provided if the local jurisdiction
maintains such an ID list. For example, in North America, this
would be a "NENA Company ID". Devices SHOULD NOT use this
element.
Reason for Need: Inform the call taker of the identity of the entity
providing the additional call data structure.
How Used by Call Taker: Where jurisdictions have lists of providers
the Data Provider ID can be useful.
4.3. Data Provider ID Series
Data Element: Data Provider ID Series
Use: Conditional. If Data Provider ID is provided, Data Provider ID
Series is required.
XML Element: <ProviderIDSeries>
Description: Identifies the issuer of the the ProviderId. A
registry will reflect the following valid entries:
* NENA
* EENA
Reason for Need: Identifies how to interpret the Data Provider ID.
How Used by Call Taker: Determines which provider ID registry to
consult for more information
4.4. Type of Data Provider
Data Element: Type of Data Provider ID
Rosen, et al. Expires April 25, 2013 [Page 10]
Internet-Draft Additional Call Data October 2012
Use: Conditional. If Data Provider ID is provided, Type of Data
Provider ID is required.
XML Element: <TypeOfProviderID>
Description: Identifies the type of data provider id being supplied
in the ProviderId data element. A registry will reflect the
following valid entries:
* Access Infrastructure Provider
* Service Provider
* Service Provider Subcontractor
* Telematics Provider
* Relay Provider
* Other
Reason for Need: Identifies what kind of data provider this is.
How Used by Call Taker: To decide who to contact when further
information is needed
4.5. Data Provider Contact URI
Data Element: Data Provider Contact URI
Use: Required
XML Element: <ContactURI>
Description: For a service provider the contact SHOULD be a contact
URI. This MUST be a SIP URI. If a telephone number is the
contact address it should be provided in the form of
sip:telephonenumber@serviceprovider:user=phone. If the call is
from a device, this would reflect the contact information of the
owner of the device. When provided by a service provider, this
would be a URI to a 24/7 support organization tasked to provide
Rosen, et al. Expires April 25, 2013 [Page 11]
Internet-Draft Additional Call Data October 2012
PSAP support for this emergency call.
Reason for Need: Additional data providers may need to be contacted
for error or other unusual circumstances.
How Used by Call Taker: To contact the supplier of the additional
data for assistance in handling the call.
4.6. Data Provider Languages(s) Supported
Data Element: Data Provider Language(s) supported
Use: Conditional
XML Element: <Language>
Description: The language used by the entity at the Data Provider
Contact URI as an alpha 2-character code as defined in ISO 639-
1:2002 (http://www.iso.org/iso/catalogue_detail?csnumber=22109)
Codes for the representation of names of languages -- Part 1:
Alpha-2 code Multiple instances of this element may occur. Order
is significant; preferred language should appear first. This data
is required if a Data Provider Contact URI is provided. The
content must reflect the languages supported at the contact URI.
Reason for Need: Information needed to determine if emergency
service authority can communicate with the service provider or if
an interpreter will be needed.
How Used by Call Taker: If call taker cannot speak language(s)
supported by the service provider, a translation service will need
to be added to the conversation.
4.7. xCard of Data Provider
Data Element: xCard of Data Provider
Rosen, et al. Expires April 25, 2013 [Page 12]
Internet-Draft Additional Call Data October 2012
Use: Optional
XML Element: <DataProviderContact>
Description: There are many fields in the xCARD and the creator of
the data structure is encouraged to provide as much information as
they have available. N, ORG, ADR, TEL, EMAIL are suggested at a
minimum. N should contain name of support group or device owner
as appropriate. If more than one TEL property is provided, a
parameter from the vCard Property Value registry MUST be specified
on each TEL. For encoding of the xCard this specification uses
the XML-based encoding specified in [RFC6351].
and is hereinafter referred to as "xCard"
Reason for Need: Information needed to determine additional contact
information.
How Used by Call Taker: Assists call taker by providing additional
contact information that may not be included in the SIP invite or
the PIDF-LO.
4.8. Subcontractor Principal
Data Element: Subcontractor Principal
XML Element: <SubcontratorPrincipal>
Description: If the data provider is a subcontractor to another
provider such as an access infrastructure provider or telematics
provider, this element contains the DataProviderString of the
service provider to indicate which provider the subcontractor is
working for. This data is required if the Data Provider type is
subcontractor.
Reason for Need: Identify the entity the subcontractor works for.
How Used by Call Taker: Allows the call taker to understand what the
relationship between data providers and the service providers in
the path of the call are.
Rosen, et al. Expires April 25, 2013 [Page 13]
Internet-Draft Additional Call Data October 2012
4.9. Subcontractor Priority
Data Element: Subcontractor Priority
Use: Required
XML Element: <SubcontractorPriority>
Description: If the subcontractor should be contacted first, this
element should have a "sub" value. If the access or origination
service provider should be contacted first, this element should
have a "main" value. This data is required if the Data Provider
type is "subcontractor".
Reason for Need: Inform the call taker whether the network operator
or the subcontractor should be contacted first if support is
needed.
How Used by Call Taker: To decide which entity to contact first if
assistance is needed.
Rosen, et al. Expires April 25, 2013 [Page 14]
Internet-Draft Additional Call Data October 2012
4.10. addDataProviderInfo XML Schema
<?xml version="1.0"?>
<xs:schema
targetNamespace="urn:ietf:params:xml:ns:addDataProviderInfo"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:ad="urn:ietf:params:xml:ns:addDataProviderInfo"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:simpleType name="iso3166a2">
<xs:restriction base="xs:token">
<xs:pattern value="[A-Z]{2}"/>
</xs:restriction>
</xs:simpleType>
<xs:element name="addDataProviderInfo">
<xs:complexType>
<xs:sequence>
<xs:element name="DataProviderString"
type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="ProviderID"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="ProviderIdSeries"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="TypeOfProvider"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="ContactURI" type="xs:anyURI"
minOccurs="1" maxOccurs="1"/>
<xs:element name="Language" type="ad:iso3166a2"
minOccurs="0" maxOccurs="unbounded" />
<xs:element name="DataProviderContact"
type="xc:vcard" minOccurs="0" maxOccurs="1">
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Figure 1: addDataProviderInfo XML Schema
Rosen, et al. Expires April 25, 2013 [Page 15]
Internet-Draft Additional Call Data October 2012
5. Service Information
This block describes the service that the service provider provides
to the caller. It SHOULD be included by all SPs in the path of the
call. The mime type is "addCallSvcInfo+xml".
5.1. Service Environment
Data Element: Service Environment
Use: Required
XML Element: <SvcEnvironment>
Description: This element defines whether a call is from a business
or residence caller. Currently, the only valid entries are
'Business' or 'Residence'.
Reason for Need: To assist in determining equipment and manpower
requirements.
How Used by Call Taker: Information may be used to assist in
determining equipment and manpower requirements for emergency
responders. As the information is not always available, and the
registry is not all encompassing, this is at best advisory
information, but since it mimics a similar capability in some
current emergency calling systems, it is known to be valuable.
The service provider uses it's best information (such as a rate
plan, facilities used to deliver service or service description)
to determine the information and is not responsible for
determining the actual characteristics of the location where the
call originates from.
5.2. Service Delivered by Provider to End User
Data Element: Service Delivered by Provider to End User
Use: Required
Rosen, et al. Expires April 25, 2013 [Page 16]
Internet-Draft Additional Call Data October 2012
XML Element: <SvcDelByProvider>
Description: This defines the type of service the end user has
subscribed to. The implied mobility of this service can not be
relied upon. A registry will reflect the following initial valid
entries:
* Wireless Telephone Service: Includes Satellite, CDMA, GSM,
Wi-Fi, WiMAX, LTE (Long Term Evolution)
* Fixed Public Pay/Coin telephones: Any coin or credit card
operated device.
* One way outbound service
* Inmate call/service
* Soft dialtone/quick service/warm disconnect/suspended
* Multi-line telephone system (MLTS): Includes all PBX, Centrex,
key systems, Shared Tenant Service.
* Sensor, unattended: Includes devices that generate DATA ONLY.
This is one-way information exchange and there will be no other
form of communication.
* Sensor, attended: Includes devices that are supported by a
monitoring service provider or automatically open a two-way
communication path.
* Wireline: Plain Old Telephone Service (POTS).
* VoIP Telephone Service: A type of service that offers
communication over internet protocol, such as Fixed, Nomadic,
Mobile, Unknown
* Relay Service: a type of service where there is a human 3rd
party agent who provides some kind of additional assistance to
the caller. Includes sign language relay and telematics
services which provide a service assistant on the call.
* Remote (off premise extension)
There can be more than one value returned. For example, a VoIP
inmate telephone service is a reasonable combination.
Rosen, et al. Expires April 25, 2013 [Page 17]
Internet-Draft Additional Call Data October 2012
Reason for Need: Knowing the type of service may assist the PSAP
with the handling of the call.
How Used by Call Taker: Call takers often use this information to
determine what kinds of questions to ask callers, and how much to
rely on supportive information. An emergency call from a prison
is treated differently that a call from a sensor device. As the
information is not always available, and the registry is not all
encompassing, this is at best advisory information, but since it
mimics a similar capability in some current emergency calling
systems, it is known to be valuable.
5.3. Service Mobility Environment
Data Element: Service Mobility Environment
Use: Required
XML Element: <SvcMobility>
Description: This provides the service providers view of the
mobility of the caller. As the service provider may not know the
characteristics of the actual access network used, the value not
be relied upon. A registry will reflect the following initial
valid entries:
* Mobile: the device should be able to move at any time
* Fixed: the device is not expected to move unless the service is
relocated
* Nomadic: the device is not expected to move while on a call,
but may move between calls
Reason for Need: Knowing the service provider's belief of mobility
may assist the PSAP with the handling of the call.
How Used by Call Taker: To determine whether to assume the location
of the caller might change.
Rosen, et al. Expires April 25, 2013 [Page 18]
Internet-Draft Additional Call Data October 2012
5.4. addCallSvcInfo XML Schema
<?xml version="1.0"?>
<xs:schema
targetNamespace="urn:ietf:params:xml:ns:addCallSvcInfo"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:svc="urn:ietf:params:xml:ns:addCallSvcInfo"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:element name="addCallSvcInfo">
<xs:complexType>
<xs:sequence>
<xs:element name="SvcEnvironment"
type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="SvcDelByProvider"
type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="SvcMobility"
type="xs:string" minOccurs="1" maxOccurs="1"/>
<xs:element name="Link"
type="xs:string" minOccurs="0" maxOccurs="1">
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Figure 2: addCallSvcInfo XML Schema
Rosen, et al. Expires April 25, 2013 [Page 19]
Internet-Draft Additional Call Data October 2012
6. Device Information
This block provides information about the device used to place the
call. It should be provided by any service provider that knows what
device is being used, and by the device itself. The mime type is
"addDataDevInfo+xml".
6.1. Device Classification
Data Element: Device Classification
Use: Optional
XML Element: <DeviceClassification>
Description: This data element defines the kind of device making the
emergency call. If the device provides the data structure, the
device information SHOULD be provided. If the service provider
provides the structure and it knows what the device is, the
service provider SHOULD provide the device information. Often the
carrier does not know what the device is. It is possible to
receive two Additional Data Associated with a Call data
structures, one created by the device and one created by the
service provider. This information describes the the device, not
how it is being used. This data element defines the kind of
device making the emergency call. A registry will reflect the
following valid entries:
* Cordless handset
* Fixed phone
* Mobile handset
* ATA (analog terminal adapter)
* Satellite phone
* Stationary computing device (alarm system, data sensor)
* Guardian devices
* Desktop PC
Rosen, et al. Expires April 25, 2013 [Page 20]
Internet-Draft Additional Call Data October 2012
* Laptop computing device
* Tablet computing device
* Alarm system
* Data sensor
* Personal beacons (spot)
* Auto telematics (indicates VEDS data set)
* Trucking telematics
* Farm equipment telematics
* Marine telematics
* PDA (personal digital assistant)
* PND (personal navigation device)
* Smart phone
* Internet tablet
* Gaming console
* Video phone
* Other text device
* Not Available
Reason for Need: The device classification implies the capability of
the calling device and assists in identifying the meaning of the
emergency call location information that is being presented. For
example, does the device require human intervention to initiate a
call or is this call the result of programmed instructions? Does
the calling device have the ability to update location or
condition changes? Is this device interactive or a one-way
reporting device?
Rosen, et al. Expires April 25, 2013 [Page 21]
Internet-Draft Additional Call Data October 2012
How Used by Call Taker: May assist with location of caller. For
example, a cordless handset may be outside or next door. May
provide calltaker some context about the caller, the capabilities
of the device used for the call or the environment the device is
being used in.
6.2. Device Manufacturer
Data Element: Device Manufacturer
Use: Optional
XML Element: <DeviceMfgr>
Description: The plain language name of the manufacturer of the
device.
Reason for Need: Used by PSAP management for post-mortem
investigation/resolution.
How Used by Call Taker: Probably not used by calltaker, but by PSAP
management.
6.3. Device Model Number
Data Element: Device Model Number
Use: Optional
XML Element: <DeviceModelNr>
Description: Model number of the device.
Reason for Need: Used by PSAP management for after action
investigation/resolution.
Rosen, et al. Expires April 25, 2013 [Page 22]
Internet-Draft Additional Call Data October 2012
How Used by Call Taker: Probably not used by calltaker, but by PSAP
management.
6.4. Unique Device Identifier
Data Element: Unique Device Identifier
Use: Optional
XML Element: <UniqueDeviceID>
Description: String that identifies the specific device making the
call or creating an event.
Reason for Need: Uniquely identifies the device as opposed to any
signaling identifiers encountered in the call signaling stream.
How Used by Call Taker: Probably not used by calltaker they would
need to refer to management for investigation.
6.5. Type of Device Identifier
Data Element: Type of Device Identifier
Use: Conditional: must be provided if DeviceID is provided
XML Element: <TypeOfDeviceID>
Description: Identifies the type of device identifier being
generated in the unique device identifier data element. A
registry will reflect the following valid entries:
* MEID (CDMA)
* ESN (Electronic Serial Number -- superseded by MEID)
* MAC (Media Access Control) Address -- IEEE-delegated address of
any of the interfaces of the device with a MAC address (e.g.,
Ethernet, WiFi)
Rosen, et al. Expires April 25, 2013 [Page 23]
Internet-Draft Additional Call Data October 2012
* WiMAX device certificate subject unique identifier
* IMEI (International Mobile Equipment Identifier - GSM)
* Unique Device Identifier (UDI) assigned by US FD for medical
devices
* RFID (Radio Frequency Identification)
* Sensors (types to be identified in a future document version)
* Manufacturer Serial Number
* Other
Reason for Need: Identifies how to interpret the Unique Device
Identifier.
How Used by Call Taker: Additional information that may be used to
assist with call handling.
6.6. Device/Service Specific Additional Data Structure
Data Element: Device/service specific additional data structure
Use: Optional
XML Element: <devicespecificSchema>
Description: A URI representing additional data whose schema is
specific to the device or service which created it. An example is
the VEDs structure for a vehicle telematics device. The URI, when
dereferenced, MUST yield a data structure defined by the Device/
service specific additional data type value. Different data may
be created by each classification; e.g., telematics creates VEDS
data set.
Reason for Need: Provides device/service specific data that may be
used by the call taker and/or responders.
Rosen, et al. Expires April 25, 2013 [Page 24]
Internet-Draft Additional Call Data October 2012
How Used by Call Taker: Provide information to guide call takers to
select appropriate responders, give appropriate pre-arrival
instructions to callers, and advise responders of what to be
prepared for. May be used by responders to guide assistance
provided.
6.7. Device/Service Specific Additional Data Structure Type
Data Element: Type of Device/service specific additional data
structure
Use: Conditional. MUST be provided when Device/service specific
additional URI is provided
XML Element: <devicespecificType>
Description: Value from a registry defined by this document to
describe the type of data that can be retrieved from the Device/
service specific additional data structure. Initial values are:
* IEEE 1512 - USDOT Model for traffic incidents
* VEDS
Reason for Need: This data element allows identification of
externally defined schemas, which may have additional data that
may assist in emergency response.
How Used by Call Taker: This data element allows the end user
(calltaker or first responder) to know what type of additional
data may be available to aid in providing the needed emergency
services.
Note: Information which is specific to a location or a caller
(person) should not be placed in this section.
Rosen, et al. Expires April 25, 2013 [Page 25]
Internet-Draft Additional Call Data October 2012
6.8. addDataDevInfo XML Schema
<?xml version="1.0"?>
<xs:schema
targetNamespace="urn:ietf:params:xml:ns:addDataDevInfo"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:svc="urn:ietf:params:xml:ns:addDataDevInfo"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:element name="addDataDevInfo">
<xs:complexType>
<xs:sequence>
<xs:element name="DeviceClassification"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="DeviceMfgr"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="DeviceModelNr"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="UniqueDeviceID"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xs:element name="TypeOfDeviceID"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xsd:element name="devicespecificType"
type="xs:string" minOccurs="0" maxOccurs="1"/>
<xsd:element name="devicespecificSchema"
type="xsd:anyURI" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Figure 3: addDataDevInfo XML Schema
Rosen, et al. Expires April 25, 2013 [Page 26]
Internet-Draft Additional Call Data October 2012
7. Owner/Subscriber Information
This block describes the owner of the device (if provided by the
device) or the subscriber information, if provided by a service
provider. The contact location is not necessarily the location of
the caller or incident, but is rather the nominal contact address.
The mime type is "addCallSub+xml".
7.1. xCard for Subscriber's Data
Data Element: xCARD for Subscriber's Data
Use: Conditional: Some services (e.g. prepaid phones, initialized
phones, etc.) may not have this information.
XML Element: <SubscriberData>
Description: Information known by the service provider or device
about the subscriber; e.g., Name, Address, Individual Telephone
Number, Main Telephone Number and any other data. N, ORG (if
appropriate), ADR, TEL, EMAIL are suggested at a minimum. If more
than one TEL property is provided, a parameter from the vCard
Property Value registry MUST be specified on each TEL.
Reason for Need: When the caller is unable to provide information,
this data may be used to obtain it
How Used by Call Taker: Obtaining critical information about the
caller and possibly the location when it is not able to be
obtained otherwise.
Rosen, et al. Expires April 25, 2013 [Page 27]
Internet-Draft Additional Call Data October 2012
7.2. addCallSub XML Schema
<?xml version="1.0"?>
<xs:schema
targetNamespace="urn:ietf:params:xml:ns:addCallSub"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:sub="urn:ietf:params:xml:ns:addCallSub"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
xmlns:xc="urn:ietf:params:xml:ns:vcard-4.0"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:element name="addCallSub">
<xs:complexType>
<xs:sequence>
<xs:element name="SubscriberData"
type="xc:vcard" minOccurs="0" maxOccurs="1">
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Figure 4: addCallSub XML Schema
Rosen, et al. Expires April 25, 2013 [Page 28]
Internet-Draft Additional Call Data October 2012
8. Comment
This block Provides a mechanism for the data provider to supply
extra, human readable information to the PSAP. It is not intended
for a general purpose extension mechanism
8.1. Comment
Data Element: Comment
Use: Optional
XML Element: <Comment>
Description: Human readable text providing additional information to
the PSAP.
Reason for Need: Explanatory information for values in the data
structure
How Used by Call Taker: To interpret the data provided
Rosen, et al. Expires April 25, 2013 [Page 29]
Internet-Draft Additional Call Data October 2012
8.2. Comment XML Schema
<?xml version="1.0"?>
<xs:schema
targetNamespace="urn:ietf:params:xml:ns:addCallComment"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:sub="urn:ietf:params:xml:ns:addCallComment"
xmlns:xml="http://www.w3.org/XML/1998/namespace"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:element name="addCallComment">
<xs:complexType>
<xs:sequence>
<xs:element name="Comment"
type="xs:string" minOccurs="0" maxOccurs="1">
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Figure 5: Comment XML Schema
Rosen, et al. Expires April 25, 2013 [Page 30]
Internet-Draft Additional Call Data October 2012
9. Example
INVITE sips:bob@biloxi.example.com SIP/2.0
Via: SIPS/2.0/TLS pc33.atlanta.example.com;branch=z9hG4bK74bf9
Max-Forwards: 70
To: Bob <sips:bob@biloxi.example.com>
From: Alice <sips:alice@atlanta.example.com>;tag=9fxced76sl
Call-ID: 3848276298220188511@atlanta.example.com
Call-Info: <http://wwww.example.com/alice/photo.jpg> ;purpose=icon,
<http://www.example.com/alice/> ;purpose=info,
<cid:1234567890@atlanta.example.com> ;purpose=emergencyCallData
Geolocation: <cid:target123@atlanta.example.com>
Geolocation-Routing: no
Accept: application/sdp, application/pidf+xml,
application/addDataProviderinfo+xml
CSeq: 31862 INVITE
Contact: <sips:alice@atlanta.example.com>
Content-Type: multipart/mixed; boundary=boundary1
Content-Length: ...
--boundary1
Content-Type: application/sdp
...SDP goes here
--boundary1
Content-Type: application/pidf+xml
Content-ID: <target123@atlanta.example.com>
...PIDF-LO goes here
--boundary1--
Content-Type: application/addDataProviderinfo+xml
Content-ID: <1234567890@atlanta.example.com>
...Additional Data goes here
--boundary1--
Example: Attaching Additional Data via CID to a SIP INVITE
Rosen, et al. Expires April 25, 2013 [Page 31]
Internet-Draft Additional Call Data October 2012
10. Main Telephone Number
In a xCard, used extensively in this document, there is no way to
specify a "Main" telephone number. These numbers are useful to
emergency responders who are called to a large enterprise. This
document adds a new Property Value to the "tel" property of the TYPE
parameter called "main". It can be used in any xCard in additional
data.
Rosen, et al. Expires April 25, 2013 [Page 32]
Internet-Draft Additional Call Data October 2012
11. Security Considerations
The information in this data structure will usually be considered
private. HTTPS is specified to require the provider of the
information to validate the credentials of the requester. While the
creation of a PKI that has global scope may be difficult, the
alternatives to creating devices and services that can provide
critical information securely are more daunting. The provider may
enforce any policy it wishes to use, but PSAPs and responder agencies
should deploy a PKI so that providers of additional data can check
the certificate of the client and decide the appropriate policy to
enforce based on that certificate.
Ideally, the PSAP and emergency responders will be given credentials
signed by an authority trusted by the data provider. In most
circumstances, nationally recognized credentials would be sufficient,
and if the emergency services arranges a PKI, data providers could be
provisioned with the root CA public key for a given nation. Some
nations are developing a PKI for this, and related, purposes. Since
calls could be made from devices where the device and/or the service
provider(w) are not local to the emergency authorities, globally
recognized credentials are useful. This might be accomplished by
extending the notion of the "forest guide" described in [RFC5222] to
allow the forest guide to provide the credential of the PKI root for
areas that it has coverage information for, but standards for such a
mechanism are not yet available. In its absence, the data provider
will need to obtain the root CA credentials for any areas it is
willing to provide additional data by out of band means. With the
credential of the root CA for a national emergency services PKI, the
data provider server can validate the credentials of an entity
requesting additional data by reference.
The data provider also needs a credential that can be verified by the
emergency services to know that it is receiving data from the right
server. The emergency authorities could provide credentials,
distinguishable from credentials it provides to emergency responders
and PSAPs, which could be used to validate data providers. This
would be extensible to global credential validation using the forest
guide as above. In the absence of such credentials, the emergency
authorities could maintain a list of local data providers'
credentials provided to it out of band. At a minimum, the emergency
authorities could obtain a credential from the DNS entry of the
domain in the Addional Data URI to at least validate that the server
is known to the domain providing the URI.
Data provided by devices by reference have similar credential
validation issues to service providers, and the solutions are the
same.
Rosen, et al. Expires April 25, 2013 [Page 33]
Internet-Draft Additional Call Data October 2012
12. Privacy Considerations
There is much private data in this information. Local regulations
may govern what data must be provided in emergency calls, but in
general, the emergency call system is often aided by the kinds of
information described in this document. There is a tradeoff between
the privacy considerations and the utility of the data. Certainly,
if the data cannot be protected, due to failure to establish (by TLS)
a secure connection to the data provider, data SHOULD NOT be sent
unless specifically required by regulation.
Rosen, et al. Expires April 25, 2013 [Page 34]
Internet-Draft Additional Call Data October 2012
13. IANA Considerations
13.1. Registry creation
This document creates a new registry called 'Emergency Call
Additional Data'. The following subregistries are created in
Emergency Call Additional Data:
13.1.1. Additional Call Data Blocks Registry
This document creates a new subregistry called 'Provider ID Series'.
As defined in [RFC5226], this registry operates under "Expert Review"
rules. The expert should determine that the entity requesting a new
value is a legitimate issuer of service provider IDs suitable for use
in Additional Call Data.
The content of this registry includes:
Name: The identifier which will be used in the ProviderIDSeries
element
Source: The full name of the organization issuing the identifiers
URL: A URL to the organization for further information
The values defined are:
+-----------+-----------+--------------+--------------+
| Name | Source | URL |
+-----------+--------------------------+--------------+
| NENA | North American Emergency | www.nena.org |
| | Number Association | |
| EENA | European Emergency | www.eena.org |
| | Number Association | |
+-----------+--------------------------+--------------+
RFC Editor Note:
replace XXXX in the table above with this documents RFC number
13.1.2. Service Provider Type
This document creates a new subregistry called 'Service Provider
Type'. As defined in [RFC5226], this registry operates under "Expert
Review". The expert should determine that the proposed new value is
distinct from existing values and appropriate for use in the
TypeOfServicerProvider element
The content of this registry includes:
Rosen, et al. Expires April 25, 2013 [Page 35]
Internet-Draft Additional Call Data October 2012
Name: Value to be used in TypeOfServiceProvider.
Description: A short description of the type of service provider
The values defined are:
+------------------------------+------------------------------------+
| Name | Description |
+------------------------------+------------------------------------+
|Access Infrastructure Provider| Access network service provider |
|Service Provider | Calling or Origination telecom SP |
|Service Provider Subcontractor| A contractor to another kind of SP |
|Telematics Provider | A sensor based SP, especially |
| | vehicle based |
|Relay Provider | A interpretation SP, for example, |
| | video relay for sign language |
| | interpretors |
|Other | Any other type of service provider |
+------------------------------+------------------------------------+
RFC Editor Note:
replace XXXX in the table above with this documents RFC number
13.1.3. Additional Call Data Blocks Registry
This document creates a new subregistry called 'Additional Call Data
Blocks'. As defined in [RFC5226], this registry operates under
"Expert Review" and "Specification Required" rules.
The content of this registry includes:
Name: Element Name of enclosing block.
Reference: The document that describes the block
The values defined are:
+---------------------+-----------+
| Name | Reference |
+---------------------+-----------+
| addDataProviderInfo | RFCXXXX |
| addCallSvcInfo | RFCXXXX |
| addCallSvcInfo | RFCXXXX |
| addCallSub | RFCXXXX |
| addCallComment | RFCXXXX |
+---------------------+-----------+
RFC Editor Note:
replace XXXX in the table above with this documents RFC number
Rosen, et al. Expires April 25, 2013 [Page 36]
Internet-Draft Additional Call Data October 2012
13.1.4. Additional Call Data Service Delivered Registry
This document creates a new registry called 'Additional Call Data
Service Delivered'. As defined in [RFC5226], this registry operates
under "Expert Review" rules.
The content of this registry includes:
Name: enumeration token of the service.
Description: Short description identifying the service.
The values defined are:
+--------+----------------------------------------+
| Name | description |
+--------+-------+--------------------------------+
| Wrless | Wireless Telephone Service: Includes |
| | Satellite, CDMA, GSM, Wi-Fi, WiMAX, |
| | LTE (Long Term Evolution) |
| Coin | Fixed Public Pay/Coin telephones: Any |
| | coin or credit card operated device |
| 1way | One way outbound service |
| Prison | Inmate call/service |
| Temp | Soft dialtone/quick service/warm |
| | disconnect/suspended |
| MLTS | Multi-line telephone system: Includes |
| | all PBX, Centrex, key systems, |
| | Shared Tenant Service |
| SenseU | Sensor, unattended: Includes devices |
| | that generate DATA ONLY. This is |
| | one-way information exchange and |
| | there will be no other form of |
| | communication |
| SenseA | Sensor, attended: Includes devices |
| | that are supported by a monitoring |
| | service provider or automatically |
| | open a two-way communication path |
| POTS | Wireline: Plain Old Telephone Service |
| VOIP | VoIP Telephone Service: A type of |
| | service that offers communication |
| | over internet protocol, such as Fixed|
| | Nomadic, Mobile, ... |
+--------+-------+--------------------------------+
Rosen, et al. Expires April 25, 2013 [Page 37]
Internet-Draft Additional Call Data October 2012
13.1.5. Additional Call Data Device Classification Registry
This document creates a new registry called 'Additional Call Data
Device Classification'. As defined in [RFC5226], this registry
operates under "Expert Review" rules.
The content of this registry includes:
Name: enumeration token of the device classification.
Description: Short description identifying the device type.
The values defined are:
+--------+----------------------------------------+
| Name | description |
+--------+-------+--------------------------------+
|Cordless| Cordless handset |
| Fixed | Fixed phone |
| Mobile | Mobile handset |
| ATA | analog terminal adapter |
|Satphone| Satellite phone |
| FSense | Stationary computing device (alarm |
| | system, data sensor) |
| Guard | Guardian devices |
| Desktop| Desktop PC |
| Laptop | Laptop computing device |
| Tablet | Tablet computing device |
| Alarm | Alarm system |
| MSense | Mobile Data sensor |
| Beacon | Personal beacons (spot) |
| Auto | Auto telematics |
| Truck | Truck telematics |
| Farm | Farm equipment telematics |
| Marine | Marine telematics |
| PDA | Personal digital assistant |
| PND | Personal navigation device) |
| SmrtPhn| Smart phone |
| Itab | Internet tablet |
| Game | Gaming console |
| Video | Video phone |
| Text | Other text device |
| NA | Not Available |
+--------+----------------------------------------+
Rosen, et al. Expires April 25, 2013 [Page 38]
Internet-Draft Additional Call Data October 2012
13.1.6. Additional Call Data Device ID Type Registry
This document creates a new registry called 'Additional Call Data
Device ID Type'. As defined in [RFC5226], this registry operates
under "Expert Review" rules.
The content of this registry includes:
Name: enumeration token of the device id type.
Description: Short description identifying the type of device id.
The values defined are:
+--------+----------------------------------------+
| Name | description |
+--------+-------+--------------------------------+
| MEID | Mobile Equipment Identifier (CDMA) |
| ESN | Electronic Serial Number(GSM) |
| MAC | Media Access Control Address (IEEE) |
| WiMAX | device certificate unique id |
| IMEI | International Mobile Equipment ID (GSM)|
| UDI | Unique Device Identifier (medical) |
| RFID | Radio Frequency Identification |
| Sense | Sensors (types to be identified ) |
| SN | Manufacturer Serial Number |
| Other | Other |
+--------+----------------------------------------+
13.2. 'emergencyCallData' Purpose Parameter Value
This document defines the 'emergencyCallData' value for the "purpose"
parameter of the Call-Info header field. The Call-Info header and
the corresponding registry for the 'purpose' parameter was
established with RFC 3261 [RFC3261].
Header Parameter New
Field Name Value Reference
---------- --------- ----------------- ---------
Call-Info purpose emergencyCallData [This RFC]
13.3. URN Sub-Namespace Registration for provided-by Registry Entry
This section registers the namespace specified in ??? in the
provided-by registry established by RFC 4119.
Rosen, et al. Expires April 25, 2013 [Page 39]
Internet-Draft Additional Call Data October 2012
13.4. MIME Registrations
13.4.1. MIME Content-type Registration for 'application/
addDataProviderInfo+xml'
This specification requests the registration of a new MIME type
according to the procedures of RFC 4288 [RFC4288] and guidelines in
RFC 3023 [RFC3023].
MIME media type name: application
MIME subtype name: addDataProviderInfo+xml
Mandatory parameters: none
Optional parameters: charset
Indicates the character encoding of enclosed XML.
Encoding considerations:
Uses XML, which can employ 8-bit characters, depending on the
character encoding used. See Section 3.2 of RFC 3023 [RFC3023].
Security considerations:
This content type is designed to carry the data provider
information, which is a sub-category of additional data about an
emergency call.
Since this data contains personal information appropriate
precautions have to be taken to limit unauthorized access,
inappropriate disclosure to third parties, and eavesdropping of
this information. Please refer to Section 11 and Section 12 for
more information.
Interoperability considerations: None
Published specification: [TBD: This specification]
Applications which use this media type: Emergency Services
Additional information:
Magic Number: None
File Extension: .xml
Rosen, et al. Expires April 25, 2013 [Page 40]
Internet-Draft Additional Call Data October 2012
Macintosh file type code: 'TEXT'
Person and email address for further information: Hannes
Tschofenig, Hannes.Tschofenig@gmx.net
Intended usage: LIMITED USE
Author: This specification is a work item of the IETF ECRIT
working group, with mailing list address <ecrit@ietf.org>.
Change controller: The IESG <ietf@ietf.org>
13.4.2. MIME Content-type Registration for 'application/
addCallSvcInfo+xml'
This specification requests the registration of a new MIME type
according to the procedures of RFC 4288 [RFC4288] and guidelines in
RFC 3023 [RFC3023].
MIME media type name: application
MIME subtype name: addCallSvcInfo+xml
Mandatory parameters: none
Optional parameters: charset
Indicates the character encoding of enclosed XML.
Encoding considerations:
Uses XML, which can employ 8-bit characters, depending on the
character encoding used. See Section 3.2 of RFC 3023 [RFC3023].
Security considerations:
This content type is designed to carry the service information,
which is a sub-category of additional data about an emergency
call.
Since this data contains personal information appropriate
precautions have to be taken to limit unauthorized access,
inappropriate disclosure to third parties, and eavesdropping of
this information. Please refer to Section 11 and Section 12 for
more information.
Rosen, et al. Expires April 25, 2013 [Page 41]
Internet-Draft Additional Call Data October 2012
Interoperability considerations: None
Published specification: [TBD: This specification]
Applications which use this media type: Emergency Services
Additional information:
Magic Number: None
File Extension: .xml
Macintosh file type code: 'TEXT'
Person and email address for further information: Hannes
Tschofenig, Hannes.Tschofenig@gmx.net
Intended usage: LIMITED USE
Author: This specification is a work item of the IETF ECRIT
working group, with mailing list address <ecrit@ietf.org>.
Change controller: The IESG <ietf@ietf.org>
13.4.3. MIME Content-type Registration for 'application/
addDataDevInfo+xml'
This specification requests the registration of a new MIME type
according to the procedures of RFC 4288 [RFC4288] and guidelines in
RFC 3023 [RFC3023].
MIME media type name: application
MIME subtype name: addDataDevInfo+xml
Mandatory parameters: none
Optional parameters: charset
Indicates the character encoding of enclosed XML.
Encoding considerations:
Uses XML, which can employ 8-bit characters, depending on the
character encoding used. See Section 3.2 of RFC 3023 [RFC3023].
Rosen, et al. Expires April 25, 2013 [Page 42]
Internet-Draft Additional Call Data October 2012
Security considerations:
This content type is designed to carry the device information
information, which is a sub-category of additional data about an
emergency call.
Since this data contains personal information appropriate
precautions have to be taken to limit unauthorized access,
inappropriate disclosure to third parties, and eavesdropping of
this information. Please refer to Section 11 and Section 12 for
more information.
Interoperability considerations: None
Published specification: [TBD: This specification]
Applications which use this media type: Emergency Services
Additional information:
Magic Number: None
File Extension: .xml
Macintosh file type code: 'TEXT'
Person and email address for further information: Hannes
Tschofenig, Hannes.Tschofenig@gmx.net
Intended usage: LIMITED USE
Author: This specification is a work item of the IETF ECRIT
working group, with mailing list address <ecrit@ietf.org>.
Change controller: The IESG <ietf@ietf.org>
13.4.4. MIME Content-type Registration for 'application/addCallSub+xml'
This specification requests the registration of a new MIME type
according to the procedures of RFC 4288 [RFC4288] and guidelines in
RFC 3023 [RFC3023].
MIME media type name: application
MIME subtype name: addCallSub+xml
Rosen, et al. Expires April 25, 2013 [Page 43]
Internet-Draft Additional Call Data October 2012
Mandatory parameters: none
Optional parameters: charset
Indicates the character encoding of enclosed XML.
Encoding considerations:
Uses XML, which can employ 8-bit characters, depending on the
character encoding used. See Section 3.2 of RFC 3023 [RFC3023].
Security considerations:
This content type is designed to carry owner/subscriber
information, which is a sub-category of additional data about an
emergency call.
Since this data contains personal information appropriate
precautions have to be taken to limit unauthorized access,
inappropriate disclosure to third parties, and eavesdropping of
this information. Please refer to Section 11 and Section 12 for
more information.
Interoperability considerations: None
Published specification: [TBD: This specification]
Applications which use this media type: Emergency Services
Additional information:
Magic Number: None
File Extension: .xml
Macintosh file type code: 'TEXT'
Person and email address for further information: Hannes
Tschofenig, Hannes.Tschofenig@gmx.net
Intended usage: LIMITED USE
Author: This specification is a work item of the IETF ECRIT
working group, with mailing list address <ecrit@ietf.org>.
Change controller: The IESG <ietf@ietf.org>
Rosen, et al. Expires April 25, 2013 [Page 44]
Internet-Draft Additional Call Data October 2012
13.4.5. MIME Content-type Registration for 'application/
addCallComment+xml'
This specification requests the registration of a new MIME type
according to the procedures of RFC 4288 [RFC4288] and guidelines in
RFC 3023 [RFC3023].
MIME media type name: application
MIME subtype name: addCallComment+xml
Mandatory parameters: none
Optional parameters: charset
Indicates the character encoding of enclosed XML.
Encoding considerations:
Uses XML, which can employ 8-bit characters, depending on the
character encoding used. See Section 3.2 of RFC 3023 [RFC3023].
Security considerations:
This content type is designed to carry a comment, which is a sub-
category of additional data about an emergency call.
This data may contain personal information. Appropriate
precautions may have to be taken to limit unauthorized access,
inappropriate disclosure to third parties, and eavesdropping of
this information. Please refer to Section 11 and Section 12 for
more information.
Interoperability considerations: None
Published specification: [TBD: This specification]
Applications which use this media type: Emergency Services
Additional information:
Magic Number: None
File Extension: .xml
Macintosh file type code: 'TEXT'
Rosen, et al. Expires April 25, 2013 [Page 45]
Internet-Draft Additional Call Data October 2012
Person and email address for further information: Hannes
Tschofenig, Hannes.Tschofenig@gmx.net
Intended usage: LIMITED USE
Author: This specification is a work item of the IETF ECRIT
working group, with mailing list address <ecrit@ietf.org>.
Change controller: The IESG <ietf@ietf.org>
13.5. URN Sub-Namespace Registration
13.5.1. Registration for urn:ietf:params:xml:ns:addDataProviderInfo
This section registers a new XML namespace, as per the guidelines in
RFC 3688 [RFC3688].
URI: urn:ietf:params:xml:ns:addDataProviderInfo
Registrant Contact: IETF, ECRIT working group, <ecrit@ietf.org>, as
delegated by the IESG <iesg@ietf.org>.
XML:
BEGIN
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type"
content="text/html;charset=iso-8859-1"/>
<title>Namespace for Additional Emergency Call Data:
Data Provider Information</title>
</head>
<body>
<h1>Namespace for Additional Data related to an Emergency Call</h1>
<h2>Data Provider Information</h2>
<p>See [TBD: This document].</p>
</body>
</html>
END
Rosen, et al. Expires April 25, 2013 [Page 46]
Internet-Draft Additional Call Data October 2012
13.5.2. Registration for urn:ietf:params:xml:ns:addCallSvcInfo
This section registers a new XML namespace, as per the guidelines in
RFC 3688 [RFC3688].
URI: urn:ietf:params:xml:ns:addCallSvcInfo
Registrant Contact: IETF, ECRIT working group, <ecrit@ietf.org>, as
delegated by the IESG <iesg@ietf.org>.
XML:
BEGIN
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type"
content="text/html;charset=iso-8859-1"/>
<title>Namespace for Additional Emergency Call Data:
Service Information</title>
</head>
<body>
<h1>Namespace for Additional Data related to an Emergency Call</h1>
<h2>Service Information</h2>
<p>See [TBD: This document].</p>
</body>
</html>
END
13.5.3. Registration for urn:ietf:params:xml:ns:addDataDevInfo
This section registers a new XML namespace, as per the guidelines in
RFC 3688 [RFC3688].
URI: urn:ietf:params:xml:ns:addDataDevInfo
Registrant Contact: IETF, ECRIT working group, <ecrit@ietf.org>, as
delegated by the IESG <iesg@ietf.org>.
XML:
Rosen, et al. Expires April 25, 2013 [Page 47]
Internet-Draft Additional Call Data October 2012
BEGIN
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type"
content="text/html;charset=iso-8859-1"/>
<title>Namespace for Additional Emergency Call Data:
Device Information</title>
</head>
<body>
<h1>Namespace for Additional Data related to an Emergency Call</h1>
<h2>Device Information</h2>
<p>See [TBD: This document].</p>
</body>
</html>
END
13.5.4. Registration for urn:ietf:params:xml:ns:addCallSub
This section registers a new XML namespace, as per the guidelines in
RFC 3688 [RFC3688].
URI: urn:ietf:params:xml:ns:addCallSub
Registrant Contact: IETF, ECRIT working group, <ecrit@ietf.org>, as
delegated by the IESG <iesg@ietf.org>.
XML:
Rosen, et al. Expires April 25, 2013 [Page 48]
Internet-Draft Additional Call Data October 2012
BEGIN
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type"
content="text/html;charset=iso-8859-1"/>
<title>Namespace for Additional Emergency Call Data:
Owner/Subscriber Information</title>
</head>
<body>
<h1>Namespace for Additional Data related to an Emergency Call</h1>
<h2> Owner/Subscriber Information</h2>
<p>See [TBD: This document].</p>
</body>
</html>
END
13.5.5. Registration for urn:ietf:params:xml:ns:addCallComment
This section registers a new XML namespace, as per the guidelines in
RFC 3688 [RFC3688].
URI: urn:ietf:params:xml:ns:addCallComment
Registrant Contact: IETF, ECRIT working group, <ecrit@ietf.org>, as
delegated by the IESG <iesg@ietf.org>.
XML:
BEGIN
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type"
content="text/html;charset=iso-8859-1"/>
<title>Namespace for Additional Emergency Call Data:Comment</title>
</head>
<body>
<h1>Namespace for Additional Data related to an Emergency Call</h1>
<h2> Comment</h2>
<p>See [TBD: This document].</p>
</body>
Rosen, et al. Expires April 25, 2013 [Page 49]
Internet-Draft Additional Call Data October 2012
</html>
END
13.6. Schema Registrations
This specification registers five schemas, as per the guidelines in
RFC 3688 [RFC3688].
URI:
urn:ietf:params:xml:schema:additional-data:addDataProviderInfo
Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
delegated by the IESG (iesg@ietf.org).
XML: The XML schema can be found in Figure 1.
URI: urn:ietf:params:xml:schema:additional-data:addCallSvcInfo
Registrant Contact: IETF, ECRIT Working Group (ectit@ietf.org), as
delegated by the IESG (iesg@ietf.org).
XML: The XML schema can be found in Figure 2.
URI: urn:ietf:params:xml:schema:additional-data:addDataDevInfo
Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
delegated by the IESG (iesg@ietf.org).
XML: The XML schema can be found in Figure 3.
URI: urn:ietf:params:xml:schema:additional-data:addCallSub
Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
delegated by the IESG (iesg@ietf.org).
XML: The XML schema can be found in Figure 4.
URI: urn:ietf:params:xml:schema:additional-data:addCallComment
Registrant Contact: IETF, ECRIT Working Group (ecrit@ietf.org), as
delegated by the IESG (iesg@ietf.org).
XML: The XML schema can be found in Figure 5.
Rosen, et al. Expires April 25, 2013 [Page 50]
Internet-Draft Additional Call Data October 2012
13.7. VCard Parameter Value Registration
This document registers a new value in the vCARD Parameter Values
registry as defined by [RFC6350] with the following template:
Value: main
Purpose: The main telephone number, typically of an enterprise, as
opposed to a direct dial number of an individual employee
Conformance: This value can be used with the "TYPE" parameter
applied on the "TEL" property.
Example(s):
TEL;VALUE=uri;TYPE="main,voice";PREF=1:tel:+1-418-656-9000
Rosen, et al. Expires April 25, 2013 [Page 51]
Internet-Draft Additional Call Data October 2012
14. Acknowledgments
This work was originally started in NENA and has benefitted from a
large number of participants in NENA standardization efforts,
originally in the Long Term Definition Working Group, the Data
Technical Committee and most recently the Additional Data working
group. The authors are grateful for the initial work and extended
comments provided by the many NENA participants.
Rosen, et al. Expires April 25, 2013 [Page 52]
Internet-Draft Additional Call Data October 2012
15. References
15.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2392] Levinson, E., "Content-ID and Message-ID Uniform Resource
Locators", RFC 2392, August 1998.
[RFC3023] Murata, M., St. Laurent, S., and D. Kohn, "XML Media
Types", RFC 3023, January 2001.
[RFC3261] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
A., Peterson, J., Sparks, R., Handley, M., and E.
Schooler, "SIP: Session Initiation Protocol", RFC 3261,
June 2002.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC4119] Peterson, J., "A Presence-based GEOPRIV Location Object
Format", RFC 4119, December 2005.
[RFC4288] Freed, N. and J. Klensin, "Media Type Specifications and
Registration Procedures", BCP 13, RFC 4288, December 2005.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226,
May 2008.
[RFC6350] Perreault, S., "vCard Format Specification", RFC 6350,
August 2011.
[RFC6351] Perreault, S., "xCard: vCard XML Representation",
RFC 6351, August 2011.
15.2. Informational References
[I-D.iab-privacy-considerations]
Cooper, A., Tschofenig, H., Aboba, B., Peterson, J.,
Morris, J., Hansen, M., and R. Smith, "Privacy
Considerations for Internet Protocols",
draft-iab-privacy-considerations-03 (work in progress),
July 2012.
[I-D.ietf-ecrit-phonebcp]
Rosen, B. and J. Polk, "Best Current Practice for
Rosen, et al. Expires April 25, 2013 [Page 53]
Internet-Draft Additional Call Data October 2012
Communications Services in support of Emergency Calling",
draft-ietf-ecrit-phonebcp-20 (work in progress),
September 2011.
[RFC5222] Hardie, T., Newton, A., Schulzrinne, H., and H.
Tschofenig, "LoST: A Location-to-Service Translation
Protocol", RFC 5222, August 2008.
[RFC6443] Rosen, B., Schulzrinne, H., Polk, J., and A. Newton,
"Framework for Emergency Calling Using Internet
Multimedia", RFC 6443, December 2011.
Rosen, et al. Expires April 25, 2013 [Page 54]
Internet-Draft Additional Call Data October 2012
Authors' Addresses
Brian Rosen
NeuStar
470 Conrad Dr.
Mars, PA 16046
US
Phone: +1 724 382 1051
Email: br@brianrosen.net
Hannes Tschofenig
Nokia Siemens Networks
Linnoitustie 6
Espoo 02600
Finland
Phone: +358 (50) 4871445
Email: Hannes.Tschofenig@gmx.net
URI: http://www.tschofenig.priv.at
Roger Marshall
TeleCommunication Systems, Inc.
2401 Elliott Avenue
Seattle, WA 98121
US
Phone: +1 206 792 2424
Email: rmarshall@telecomsys.com
URI: http://www.telecomsys.com
Rosen, et al. Expires April 25, 2013 [Page 55]
