UIT - Secteur de la normalisation des télécommunications
ITU - Telecommunication Standardization Sector
UIT - Sector de Normalización de las Telecomunicaciones
Study Period 1997-2000
Commission d' études 

Study Group
 13
Comisión de Estudio 
Contributi on tardive 

Delayed Contributi on  D.XXX
Contribuci ón tardía 
Geneva, February, 28 - March, 10, 2000
Texte disponible seulement en 

Text available only in
 E
Texto disponible solamente en 
Question(s):
SOURCE*:
UNITED STATES OF AMERICA (Proposed)
TITLE:
Information Purposes: UPDATED COMPENDUIUM OF IP-RELATED WORK
ACTIVITES WITHIN THE TELECOMMUNICATION INDUSTRY
ASSOCIATION (TIA)
___________________
ABSTRACT
This document reflects the current update of Internet Protocol (IP)-related work activities within the
TIA and is presented for incorporation in the Study Group (SG) 13 survey of such work being
addressed in Standards Development Organizations (SDOs).
INTRODUCTION
IP-related activities, within TIA, are currently being addressed within the TR-29, TR-34, TR-41,
and TR-45 Engineering Committees. This document summarizes the activities of the Engineering
Committees and Subcommittees, and is an update to D56, submitted to TSAG in April 1999.
* Contact:
Mr. Gerry Rosenblatt
TIA
USA
Tel:
+1 703 907-7722
Fax:
+1 703 907-7727
E-mail: grosenbl@tia.eia.org
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1. IP-Related Work Activities of TIA TR-29 Engineering Committee-Facsimile Systems &
Equipment Engineering Committee
The basic work under PN-3799 - Internet Fax which resulted in contributions to SG8 leading to the
approval of Rec. T.38 - Procedures for real time Group 3 facsimile communication over IP
networks and Rec. T.37 - Procedures for the transfer of facsimile data via store and forward on
the Internet has been completed. The current effort in TR-29 is to produce a contribution with an
enhancement to Rec. T.38, which would allow T.38 gateways to communicate with Group 3
terminals wishing to use the optional V.34 modulations. Contributions have also been generated
for the support of optional call control methods using SIP/SDP or H.248/MEGACO.
2. IP-Related Work Activities of TIA Satellite Communications Division (TR-34) Engineering
Committee
TR-34.1, Communications and Interoperability
TR-34.1 has collaborated with the Internet Engineering Task Force (IETF) to create a Satellite
Transport Control Protocol (TCP) over Satellite Working Group. This group has developed two
documents on improving Transport Control Protocol (TCP) performance over geosynchronous
satellites. The first document “RFC 2488: Enhancing TCP over Satellite Channels using Standard
Mechanisms” describes which standard options in TCP should be used to get optimal performance
over a satellite.
A Document developed by the above Satellite Working Group, “Ongoing —TCP Research Related
to Satellites” describes research in the Internet community which shows promise of further
benefiting performance over satellites. Approval of this document as an Informational RFC is
expected by summer 1999. Additionally, TIA is developing an IETF submission on the risks and
impacts of TCP spoofing.
With regard to Satellite VoIP, a Working Group was created in TR-34.1, Internet Protocols over
Satellite, to examine performance issues
TIA is maintaining close participation in IETF Performance Implications of Link Characteristics
(pilc) Working Group. This Group is examining potential protocol modifications to enhance
performance under degraded link conditions. Such conditions include those found on satellite and
terrestrial wireless links, such as high bit error rate, intermittent connectivity, low data rates, link
asymmetry, and others.
TR-34.1 is continuing to work within the IETF to influence protocol development of Multicast and
reliable Multicast protocols. Continued work activity associated with these issues, or any other
satellite-related IP issues, is expected to continue, in keeping with the interest on the part of the
membership.
3. IP-Related Work Activities of TIA User Premises Equipment Division (TR-41)
Engineering Committee-User Premises Telecommunications Requirements
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TR-41.1, Multiline Terminal Systems
In December 1998, the parent subcommittee, TR-41.1 began work to revise the private branch
exchange (PBX)-loss plan to include IP telephones and gateways. It is part of a revision of the
PBX performance standard, TIA/EIA-464-B, which is being addressed in PN-3673.
A new working group, TR-41.1.2, Voice Quality Over IP, was started in December 1998 to address
end-to-end voice quality over an IP/switched-circuit network (IP/SCN). This project will build on
the European Telecommunications Standards Institute Telecommunications and Internet Protocol
Harmonization Over Networks (ETSI TIPHON) and IP/SCN network connection scenarios. The
end-to-end voice quality of the various scenarios will be analyzed using the “E-Model,” a computer
tool widely used by the industry for transmission planning, and will build on private network
transmission planning guidelines in TIA/EIA/TSB [Telecommunications Systems Bulletin] 32-A.
Quality-of-service categories will be defined, taking into account the impairments introduced by IP
networks. This project includes collaboration with ETSI Speech Transmission Quality (ETSI
STQ).
TR-41.3, Analog and Digital Wireline Telephones
In October 1998, TR-41 announced the initiation of a project (PN-4352) in Engineering
Subcommittee TR-41.3, to create a voice-transmission performance standard for narrowband
digital telephones that includes products used for Internet telephony. The scope of the standard
includes handset, headset and handsfree audio performance, and encompasses IP-based
interfaces, as well as pulse code modulation (PCM)-based interfaces, with codecs of 64
kbit/second and lower. PN-4352 (soon to be published as TIA/EIA/IS-810) also includes quality of
service aspects of voice-over-IP (VOIP). This is the first all-encompassing standard in the world for
audio performance of narrowband digital telephones.
An exciting aspect of IP telephony is the possibility of wideband (150 to 6800 Hz) telephony.
Building on the narrowband PN-4352 project is a new wideband project, which will be starting in
November 1999.
In January of 1999, TIA started developing a standard for IP telephone interoperability in TR41.3.4, VOIP Terminals. TR-41 initiated this project to address the convergence of voice- and IPbased networks and the resulting need for standards-based telephones for use on IP networks, so
that telephones from different suppliers can be interchanged. The project, PN-4462 (soon to be
published as TIA/EIA/IS-811), defines the "whole device" standard for IP telephones and includes
voice-transmission requirements, physical connectors, Ethernet interface, safety considerations,
the basic set of supplementary services for IP business telephones and options-control protocols.
The new standard will reference several existing standards. Voice-quality aspects are governed
by PN-4352, a voice transmission standard for Internet telephony. Control options include
ongoing efforts such as the Internet Engineering Task Force (IETF) Megaco Protocol (Media
Gateway Control), the IETF Session Initiation Protocol (SIP), and the International
Telecommunication Union (ITU) H.323 protocol suite.
In an effort to promote global acceptance of the standard, Subcommittee TR-41.3 is working with
IP network standards developing organizations (SDOs) such as IETF and ETSI STQ.
TR-41.4, IP Telephony Infrastructure and Interworking Standards
To date, little has been done to standardize system functionality of IP-telephony infrastructures,
while there has been extensive development of peripheral device standards for IP telephony
systems in other standards developing organizations and industry fora such as ETSI, the IETF and
the ITU.
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As a result, TIA formed a new subcommittee in July of 1999, TR-41.1, dedicated to developing
standards for IP telephony gateways, infrastructure and interworking. TR-41.4 will deal with VOIP
standards aspects of enhanced-911, enterprise-to-public-switched-telephone-network-gateway
equipment standards, interworking between dissimilar islands of control, and interworking between
peer and master/slave-controlled telephone equipment standards.
The subcommittee specifically will focus on VOIP connectivity and interoperability between
endpoints within a single enterprise and its service provider networks. The area of interest does
not extend to the external service provider networks.
Wireless IP Project
Also in July 1999, TIA created an initiative to develop wireless IP (WIP) standards. The initiative
supports TIA's ongoing efforts to develop standards for wireless Internet and emerging
technologies that will apply to all wireless multiple access schemes.
There is global interest and need to have IP capabilities over wireless networks, and TIA
recognizes that it is essential to develop a common IP standard to promote growth and easy
accessibility to the Internet for the wireless technology industries. TIA believes that a common IP
standard will encourage lower implementation costs and increased operating reliability.
.
4. IP-Related Work Activities of TR-45, Mobile and Personal Communications Systems
Engineering Committee
TR-45.2, Wireless Intersystem Technology
For several months, TR-45.2 has been discussing ANSI-41 signaling over IP transport. TR-45.2
has also initiated discussion with the TR-45 AHAG (Ad-Hoc Authentication Group) regarding
security issues relative to IP-based transport.
The Subcommittee plans to standardize an IP-based transport mechanism in a future revision of
TIA/EIA-41. The Subcommittee is considering the initiation of a new project to address this work in
our 2000 Workplan.
TR-45.3, Time Division Digital Technology
TR-45.3 has completed the TDMA Universal Wireless Communications (UWC-136) technology
RTT air interface work, which has been published as TIA/EIA-136 Revision A. TR-45.3 worked
with ETSI to design the UWC-135 RTT data section, Global Packet Radio Service (GPRS)
backbone for IP traffic, to be based on ETSI’s Global System for Mobile (GSM) communications
protocols specification.
UWC-136 was designed to provide a TIA/EIA-136 RTT candidate that meets IMT-2000 design
requirements. TR-45.3 adopted the cellular/PCS TDMA carrier philosophy of evolution from 1G to
3G systems, while addressing the specific desires and goals for 3G.
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TR-45.3 completed its submission of UWC-136 (TIA/EIA-136 Rev. B) ballot material for inclusion
in the ITU-R Recommendation M.[RSPC] section entitled, “IMT-2000 TDMA Single Carrier,” at the
18th meeting of the ITU-R TG8/1 in Helsinki. TR-45.3 is in the public review process for TIA/EIA136 Rev. B and expects to complete this activity by April 2000 for the publication of Rev.0 of
M.[RSPC].
Work has just commenced planning TIA/EIA-136 Revision C with additional enhanced IP
capabilities to be included in an updated (Revision A) of the ITU-R Recommendation RSPC in
mid-2000.
TR-45.4, Radio to Switching Technology
TR-45.4 uses mobile IP in its R-P (Radio-Packet) interface to the PDSN (Packet Data Switching
Network) which is the A-interface.
TR-45.5, Spread Spectrum Digital Technology
TR-45.5 is in the process of doing V&V for Phase 2 for IMT 2000. The IS 2000 Rev. A documents
went out for ballot at the end of 1999. The data capabilities that will be included in this version will
be: ISDN support, extended RLP, 384 Kbps packet data services. The support of R-UIM (SIM
card) will be included for 95B and IS 2000 (1XRTT) systems. Work will be completed on the
documents prior to March 25, 2000 in order to meet the ITU timeframe.
TR-45.6, Adjunct Wireless Packet Data Technology
TR-45.6 completed work on IS-732 and TSB-87, popularly known as the Cellular Digital Packet
Data (CDPD) standard, in 1997. CDPD systems assign users a fixed IP address and provide
native IP datagram transport to both the public Internet and private Intranets based on network
configuration.
As of December 1999, TR-45.6 is nearing completion of work on an architecture document, called
Wireless IP Network Architecture based on IETF Protocols and to be published as TSB-115,
describing a system for providing native IP datagram transport on cdma2000 systems using the
packet data services defined in by IS-2000 and IS-707A. As a general design principle, this work
calls for the use of IETF protocols whenever possible to minimize the number of new protocols
and thereby speed ease of implementation and time to market.
TR-45.6 is also nearing completion of the first standard based on this architecture. This document
describes two general methods for accessing both the public Internet and private Intranets, with
one providing wide area mobility management and secure private network access based on
network supported Mobile IP. This first standard will base its authentication, authorization and
accounting (AAA) largely on the existing Remote Authentication Dial In User Service (RADIUS)
protocol, and user identity will be based on the Network Address Identifier (NAI), allowing for
dynamic address assignment and multiple identities per terminal. Network based Quality of
Service capabilities are based on the Differentiated Services (Diff-Serv) protocols.
Work has also begun on the second version of the standard, which will incorporate a new protocol
for AAA that will provide support for additional capabilities and more robust operations. This task
is expected to be completed by the middle of 2000.
TR-45.7, Wireless Network Management, has been engaged in work that can be re-used for IP
networks. For example, a TR-45.7 contribution on "charging and billing" was made to ITU-T SG 4.
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This contribution became the baseline text of a draft new recommendation. Although not
specifically intended for IP networks, overlap of purpose avails re-use of a large percentage of the
draft new recommendation. Other work in performance, service provisioning, etc. allows for
similar IP re-use.
Standards requirements (Stage 1), for the management of third generation wireless
telecommunications systems, are being prepared by TSG-S WG2 of 3GPP2. These requirements
will be used by TIA subcommittee TR-45.7 to prepare standards (Stages 2 & 3). These
requirements and their commensurate standards will be prepared in phases.
The general area of these standards will deal with wireless packet data system management.
Wireless packet data systems utilize IP networks for communication. Hence, these standards are
for wireless IP networks.
Five functional areas will be broached:
1. Accounting management,
2. Fault management,
3. Configuration management,
4. Performance management,
5. Security management.
The phases of work will address specific aspects of the functional areas. For example, the
specific aspect of accounting management, "charging and billing", will be addressed. These
specific aspects and the order of examination will be defined by WG2. Such prioritization is
currently WG2 "work-in-progress". The first phase requirements are scheduled for completion by
the end of 1999. It is anticipated that TR-45.7 will undertake the corresponding Stage 2 effort
before the end of February, following a February 2000 TR-45.7/WG2 joint meeting on Phase 1.
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