[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Ecrit] Terminology section (<draft-schulzrinne-ecrit-requirements-01.txt>)
hi all,
please find my comments below (#).
a number of requirements are not needed and some others are missing.
2. Terminology
# i have the impression that we go a little bit far with the terminology
section.
In this document, the key words "MUST", "MUST NOT", "REQUIRED",
"SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY",
and "OPTIONAL" are to be interpreted as described in RFC 2119 [1] and
indicate requirement levels for compliant implementations.
Since a requirements document does not directly specify an implement
able protocol, these compliance labels should be read as indicating
requirements for the protocol or architecture, rather than an
implementation.
For lack of a better term, we will use the term "caller" or
"emergency caller" to refer to the person placing an emergency call
or sending an emergency IM.
Access Infrastructure Provider (AIP): An organization that provides
physical network connectivity to its customers or users, e.g.
through digital subscriber lines, cable TV plants, Ethernet,
leased lines or radio frequencies. This entity may or may not
also provide IP routing, IP addresses, or other Internet protocol
services. Examples of such organizations include
telecommunication carriers, municipal utilities, larger
enterprises with their own network infrastructure, and government
organizations such as the military.
[Ed. AIP vs. IAP vs. ? not yet clear as to general agreement on a
single term.]
# do we use this term in the document? i don't think so.
# if we think that these terms are needed then we should introduce a
(sub)section about actors.
# (at least something similar to section 4 of
http://www.ietf.org/internet-drafts/draft-tschofenig-ecrit-security-thre
ats-01.txt)
address: A description of a location of a person, organization, or
building, most often consisting of numerical and text elements
such as street number, street name, and city arranged in a
particular format.
# why do we need to define what an address is?
administrative domain: An area or group of services falling with in a
specific category or jurisdictional boundary.
# why do we need this term?
Application (Voice) Service Provider (ASP, VSP): The organization
that provides voice or other application-layer services, such as
call routing, a SIP URI or PSTN termination. This organization
can be a private individual, an enterprise, a government or a
service provider. We avoid the term voice service provider as
emergency calls are likely to use other media, including text and
video, in the future. For a particular user, the ASP may not be
the same organization as the AIP or ISP.
Schulzrinne & Marshall Expires November 2, 2005 [Page 5]
Internet-Draft ECRIT requirements May 2005
Basic Emergency Service: Basic Emergency Service allows a user to
reach a PSAP serving its current location, but the PSAP may not be
able to determine the identity or geographic location of the
caller (except by having the call taker ask the caller).
# why do we need to distinguish between basic and enhanced emergency
service?
call taker: A call taker is an agent at the PSAP that accepts calls
and may dispatch emergency help. (Sometimes the functions of call
taking and dispatching are handled by different groups of people,
but these divisions of labor are not generally visible to the
outside and thus do not concern us here.)
civic location: A described location based on some defined grid, such
as a jurisdictional, postal, metropolitan, or rural reference
system (e.g. street address).
domain authentication and validation entity: A node that has
authority within a given domain to authenticate and validate user
location information.
# i think we don't use this term anymore in the document.
Emergency Control Center (ECC): Facilities used by emergency
organizations to accept and handle emergency calls. A PSAP
(below) forwards emergency calls to the emergency control center,
which dispatches police, fire, rescue and other emergency
services. An ECC serves a limited geographic area. A PSAP and
ECC can be combined into one facility (ETSI SR 002 180
definition). We assume that the ECC is reachable by IP-based
protocols, such as SIP for call signaling and RTP for media.
# haven't we once said that we want to use either psap or ecc. i
remember that we agreed to use the term psap.
emergency address: The sip:uri, sips:uri, or tel:uri which
represents the network address of the PSAP useful for the
completion of a VoIP emergency call.
emergency caller: The user or user device entity which sends his/her
location to another entity in the network.
emergency identifier: The numerical and/or text identifier which is
supplied by a user or a user device, which identifies the call as
an emergency call and is translated into an emergency address for
call routing and completion.
enhanced emergency service: Enhanced emergency services add the
ability to identify the caller identity and/or caller location to
basic emergency services. (Sometimes, only the caller location
may be known, e.g. from a public access point that is not owned by
an individual.)
Schulzrinne & Marshall Expires November 2, 2005 [Page 6]
Internet-Draft ECRIT requirements May 2005
ESRP (Emergency Services Routing Proxy): An ESRP is a call routing
entity that invokes the location-to-URL mapping, which in turn may
return either the URL for another ESRP or the PSAP. (In a SIP
system, the ESRP would typically be a SIP proxy, but could also be
a Back-to-back user agent (B2BUA).
# do we really all these geo-specific terms?
geocoding: The process of finding the location of a street address on
a map. The location can be an x,y coordinate or a feature such as
a street segment, postal delivery location, or building. In GIS,
geocoding requires a reference dataset that contains address
attributes for the geographic features in the area of interest.
geographic coordinates: A representation (measurement) of a location
on the earth's surface expressed in degrees of latitude and
longitude.
geographic coordinate system: A reference system that uses latitude
and longitude to define the locations of points on the surface of
a sphere or spheroid.
geographic transformation: A method of converting data between two
geographic coordinate systems (datums).
geographic location: A reference to a locatable point described by a
set of defined coordinates within a geographic coordinate system,
(e.g. lat/lon within WGS-84 datum)
Internet Service Provider (ISP): An organization that provides IP
network-layer services to its customers or users. This entity may
or may not provide the physical-layer and layer-2 connectivity,
such as fiber or Ethernet.
location: A geographic identification assigned to a region or feature
based on a specific coordinate system, or by other precise
information such as a street address. In the geocoding process,
the location is defined with an x,y coordinate value according to
the distance north or south of the equator and east or west of the
prime meridian.
Location Key (LK): A key identifier used to query a location server
in order to retrieve a specific end user or end user device
location.
# we don't use this term in the document anymore.
location validation: A caller location is considered valid if the
civic or geographic location is recognizable within an acceptable
location reference systems (e.g. USPS, WGS84, etc.), and can be
mapped to one or more PSAPs. Location validation ensures that a
location is reference able, but makes no assumption about the
Schulzrinne & Marshall Expires November 2, 2005 [Page 7]
Internet-Draft ECRIT requirements May 2005
association between the caller and the caller's location.
PSAP (Public Safety Answering Point): Physical location where
emergency calls are received under the responsibility of a public
authority. (This terminology is used by both ETSI, in ETSI SR 002
180, and NENA.) In the United Kingdom, PSAPs are called Operator
Assistance Centres, in New Zealand Communications Centres. Within
this document, it is assumed, unless stated otherwise, that PSAP
is that which supports the receipt of emergency calls over IP. It
is also assumed that the PSAP is reachable by IP-based protocols,
such as SIP for call signaling and RTP for media.
x,y coordinates: A pair of values that represents the distance from
an origin (0,0) along two axes, a horizontal axis (x) representing
east-west, and a vertical axis (y) representing north-south. On a
map, x,y coordinates are used to represent features at the
location they are found on the earth's spherical surface.
# we don't need this term.
# more terminology is required: i would like to see terms for the
mapping protocol (or something similar).
additionally, the client and the server actors using the protocol are
required (e.g., mapping protocol client and the server)
# what is the name for the 'process for determining the location to uri
mapping' ? resolution?
# additionally, we need a name for an 'iterative' and a 'recursive'
query to the distributed directory.
# a definition for the 'distributed directory' or 'distributed database'
is also needed.
-------
ciao
hannes
_______________________________________________
Ecrit mailing list
Ecrit at ietf.org
https://www1.ietf.org/mailman/listinfo/ecrit