Doc.: IEEE 802.11-03/462r0 IEEE 802.11 / San Francisco / 20-25 July 2003 July 2003 Jean-Michel...

July 2003

Jean-Michel Lauriol, Alcatel

Slide 1

doc.: IEEE 802.11-03/462r0

IEEE 802.11 / San Francisco / 20-25 July 2003

TIA TR-41 VoIP over WLAN projects

Jean-Michel Lauriol, AlcatelFrançois Pinier, Alcatel

July 2003


Slide 2

doc.: IEEE 802.11-03/462r0


TIA TR-41

• TR-41 : User Premises Telecommunications Requirements

• Addresses standards for telecommunications terminal equipment and systems, specifically those used for voice service, integrated voice and data service, and Internet Protocol (IP) applications.

• Overview of TIA TR-41 activities in May 03 : 11-03-296r1

July 2003


Slide 3

doc.: IEEE 802.11-03/462r0


TR-41 VoIP over WLAN Projects

• Why ?– Need for VoWLAN handset interoperability

• Based on IEEE 802.11 standards, Wi-Fi Alliance deals with only layers 1 and 2

• TIA is the right standardisation body to address end-to-end interoperability

– TIA already specified wired terminals (IP phone, …) interoperability requirements (TIA/IS-811)

• VoWLAN projects launched in Q1 2003 inside TR-41– see Press Release : http://pulse.tiaonline.org/article.cfm?id=1047

July 2003


Slide 4

doc.: IEEE 802.11-03/462r0


Scope of TR-41 VoIP over WLAN Projects - 1

• Mission :– requirements for enabling VoIP telephony

communications via WLAN in a corporate environment

• Goals :– not duplicate efforts– reference existing and drafts standards (IEEE

802.11, WFA, IETF, ...), if necessary develop new specifications.

July 2003


Slide 5

doc.: IEEE 802.11-03/462r0


Scope of TR-41 VoIP over WLAN Projects - 2

• Define interoperability requirements:

– needed WLAN architecture for voice applications

– « VoWLAN handset profile » concept

– Telephonometry

– location for Emergency Calling service

New doc

TIA 1003

New doc

TIA 1002

TBD

Update doc

TSB 146

July 2003


Slide 6

doc.: IEEE 802.11-03/462r0


Scope of future TIA 1002 document -1

• Project : PN-3-0102, “Requirements for a Wireless LAN Based IP Telephony Subsystem”

• TIA interoperability requirements shall be compliant with WFA & IEEE 802.11specifications

• Voice requirements need enhanced 802.11 specifications (11e, 11i, …) :– Living document

• Define interactions between WLAN and upper layers (e.g.. global MSC)

July 2003


Slide 7

doc.: IEEE 802.11-03/462r0



• Reference model

WT AP

AP

IP Corporate network

Call server

MA

AS

WT : Wireless Telephone AP : Access Point AS : WLAN authentication server MA : Mobility Agents MG : Media Gateway PSTN : Public Switched Telephone Network TDM : Time Division Multiplexing

MG

PSTN Private legacy TDM network

July 2003


Slide 8

doc.: IEEE 802.11-03/462r0



• Main High level requirements :– 802.11 Infra-structure mode– IP Core network based on IPV4– Support Power Save mode as defined in 802.11– Support of multiple Voice VLANs per AP– Level of QoS for a moving WT shall not be

significantly decreased due to layer 2 handovers, IP roaming and re-authentication process

– Possible to perform authentication process through WLAN smart card inside WT

– Possible to assign IP address dynamically

July 2003


Slide 9

doc.: IEEE 802.11-03/462r0



• Mobility – L2 and L3 handovers

• L3 handover is a key issue– VLAN (dedicated voice VLAN ids)

• Security is defined at several levels– define suitable authentication method above EAP for

seamless mobility– Investigate end-to-end security based on standard

telephony protocol (e.g. H.235, …)• QoS

– Mandatory features to support voice

July 2003


Slide 10

doc.: IEEE 802.11-03/462r0


Scope of future TIA 1003 document

• Project : PN-3-0103, “Requirements for a Wireless LAN Based IP Telephony Endpoint”

• Will be patterned after TIA/IS-811 but will cover products with a WLAN interface instead of an Ethernet Interface

• In addition to WLAN support, it will address requirements for :

• Display and keypad• Acoustic performances : Pointer to new telephonometry document• Network and security requirements• Power management• Telephony features description• Control protocol requirements (SIP, H.323 and Megaco)

July 2003


Slide 11

doc.: IEEE 802.11-03/462r0


Telephonometry - 1

• Current Status : Transmission requirements of wireline VoIP phone sets are defined in ANSI/TIA/EIA/-810-A specification approved December 19, 2000.

• This specification does not address wireless VoIP phone sets !

• Aim of the new project : Develop a specific standard for wireless VoIP handsets.

July 2003


Slide 12

doc.: IEEE 802.11-03/462r0


Telephonometry - 2

• Why ?Due to small shape, wireless handset does not

have same electro-acoustic features as corded phone set (e.g. Low intrinsic TCLw).

Wireless handset shall operate in noisy environment (e.g. corridor, meeting room, manufacturing space).

• Work still in progress within TR-41 for handling this new topic : Should be discussed during the next TR-41 session.

July 2003


Slide 13

doc.: IEEE 802.11-03/462r0


TIA/EIA TSB-146

• IP telephony Support for Emergency Calling Service• Problem to be solved :

– Localization of IP phones and Mobile Phones in corporate environment.

– Ideally, accuracy should be chosen so as to differentiate between floors

• Current solution– SNMP (LAN equipment or remote powering device)– DHCP tracker– Bluetooth– Other ?

July 2003


Slide 14

doc.: IEEE 802.11-03/462r0


Roadmap

• Publications : Q4’04

July 2003


Slide 15

doc.: IEEE 802.11-03/462r0


TR-41/802.11 Liaison

• Need to establish official Liaison• How to work together ?

– Proposal :• E-mails between TR-41.4 chair and chairs of IEEE 802.11 sub-

groups (Which groups ?)• TR-41.4 informs periodically the status of our works dealing

with IEEE 802.11 topics

– Which contact points (WNG, 11e, 11i, …)?

• Next TR-41 meeting is week of August 18-22 in Montreal (Canada).

• Public FTP site for TR-41.4 www.tiaonline.org

Doc.: IEEE 802.11-03/462r0 IEEE 802.11 / San Francisco / 20-25 July 2003 July 2003 Jean-Michel...

Documents

Transcript of Doc.: IEEE 802.11-03/462r0 IEEE 802.11 / San Francisco / 20-25 July 2003 July 2003 Jean-Michel...