H.323 for Telemedicine

Transcription

1 Internatinal Telecmmunicatin Unin H.323 fr Telemedicine Paul E. Jnes Rapprteur, Q2/16 Cisc Systems, Inc. Wrkshp n Standardizatin in E-health Geneva, May 2003

2 What is H.323? H.323* is the internatinal standard fr multimedia cmmunicatins ver packet-based netwrks, including the cnvergence f vice, vide, and data cmmunicatins * H.323 is Recmmendatin H.323: Packet-based multimedia cmmunicatins systems 2

3 Where did H.323 Cme Frm? Recmmendatin H.323 is a standard published by the Internatinal Telecmmunicatins Unin Telecmmunicatins Sectr () Frmerly knwn as CCITT Refer t A permanent rgan f the United Natins System (refer t 3

4 A Little Abut the Origins H.323 was riginally scped t be a prtcl fr the Lcal Area Netwrk (1996) Or was it? Lcal Area Netwrk 4

5 Origins (cnt.) The first thing peple tried t d was use H.323 in wide area netwrks, large private VIP netwrks, and ver the Internet 5

6 Origins (cnt.) H.323 was an early adpter f such IETF prtcls as RTP, which prved its ability t carry real-time audi and vide ver IP netwrks that span the glbe Indeed, H.323 was much mre than a LAN prtcl 6

7 Origins (cnt.) Recgnizing that H.323 was much mre than a LAN prtcl, evlutin and imprvement f the H.323 prtcl cntinued (and is cntinuing) within the 7

8 H.323 versus H.320 H.320 is similar t the H.323 prtcl in that it prvides vice, vide, and data cmmunicatins H.323 differs in that it is designed fr cmmunicatin ver a packetswitched netwrk, such as the Internet, an enterprise LAN, r ther IPbased netwrk, whereas H.320 is designed fr use ver ISDN Why H.323 ver H.320? ISDN is inexpensive t wn, but expensive t use The availability f flatrate pricing fr IP videcnferencing, n the ther hand, allws calls at bandwidths t expensive fr ISDN, including sme IP calls up t 2 Mbps and beynd. Frequently Asked Questins Abut Vice and Vide ver IP Netwrks, Wainhuse Research and Margalla Cmmunicatins (January 2003) An IP netwrk in the enterprise may be utilized fr vice, vide, and data, thus ptentially lwering the verall cmmunicatins (bth capital expenses and peratinal expenses) H.323 equipment can utilize existing IP-based services, including IP-based vic services, LDAP directries, DNS, web-based cllabrative tls, etc. 8

9 Evlutinary Histry f H.323 H.323 versin 1 was first apprved in 1996, with a fcus n enterprise vice, vide, and data cllabratin H.323 versin 2 was apprved in 1998, with a fcus n Internet Telephny H.323 versin 3 was apprved in 1999 with incremental imprvements H.323 versin 4 was apprved in 2000 with majr enhancements fcused n the requirements f service prviders H.323 versin 5 (scheduled fr apprval in May 2003) fcuses n maturity and stability 9

10 Versin Interperability While H.323 has been revised a number f time, fcus has always remained n backward cmpatibility Each new majr versin intrduced a number f new features, but did nt sacrifice interperability Even s, interperability events have been necessary t ensure vendr interperability, with utput f thse meetings ging as input int the SG16 prcess At every meeting, an updated H.323 Implementers Guide is published t prvide crrectins and guidance t implementers f the prtcl 10

11 A Cry fr Stability Heard Enterprise and service prviders have requested stability, citing a real need fr a mature prtcl that is nt a mving target H.323 versin 4 intrduced a new extensin mechanism, referred t as the Generic Extensibility Framewrk (GEF) that facilitates the additin f new features withut making changes t the cre standards All new features that are nt cnsidered hrizntally useful are being added as separate, ptinal extensins via the GEF mechanism 11

12 H.248: Scalability f the Gateway Media Gateway Cntrller ( Sftswitch ) H.323 H.248 Media Gateway Media Gateway Media Gateway Media Gateway Media Gateway Media Gateway SCN RTP SCN RTP SCN RTP SCN RTP SCN RTP SCN RTP 12

13 Tday s H.323 Netwrk Tplgy H.248 PSTN Gateways Vide Terminals MGC MGC GK GK Directry Gatekeepers GK GK GK Service Prvider IP Cre Netwrk Enterprise GK GK GK GK Enterprise H.323 PSTN Gateways Audi and Vide Terminals 13

14 Onging Wrk LDAP schema specificatins Definitin f usage f the H.323 URL, allwing the use f DNS and ENUM with H.323 Enhanced third-party call cntrl Quality f Service Scalability and rbustness enhancements Shrt message service 14

15 Vice, Vide, and Data Cmmunicatins frm Day 1 H.323 was designed t be a multimedia cmmunicatins prtcl frm the utset and nt limited nly t audi As such, H.323 prvides very tight integratin f audi, vide, and data cmmunicatins functinality 15

16 Where We are Tday Vice, vide, and data cnferencing capability T.38 fax supprt Mdem ver IP supprt Many supplementary services defined Strng interperability with ther H.32x systems, including H.320 (ISDN) and H.323M (3GPP mbile wireless) Specificatin f media gateway decmpsitin (via H.248) Supprt fr signaling and media security User, terminal, and service terminal mbility Supprt fr emergency services signaling 16

17 Where We are Tday (cnt.) Extremely wide deplyment Billins f minutes f traffic per mnth wrldwide (cunting public netwrks nly) Mre than 90% f all vice ver IP traffic tday is H.323 Nearly 100% f the vide ver IP traffic tday is H

18 Where is H.323 Used? Whlesale transit Calling Card Vice Cnferencing Vice VPNs Unified Cmmunicatins IP-PBX PC-t-phne Vide cnferencing Distance Learning Call center IP-Centrex Mbility services Custm news / inf Vice/Data/Vide Cllabratin Bradband residential Mre 18

19 Industry Supprt Hundreds f service prviders and equipment manufacturers supprting H.323 H.323 market still grwing strngly Vice ver IP has been the market driver in recent years Vide ver IP is nw becming mre ppular than ever, with deplyments in several service prviders 19

20 H.323 Frum The H.323 Frum was funded in 2002 Spnsred by the Internatinal Multimedia Telecmmunicatins Cnsrtium (IMTC) 20

21 H.323 Frum Activities Equipment certificatin requirements Live cnferences (tw r three per year) Vide cnferences (three r fur per year) Strategic press releases Organized presentatins at ther cnferences 21

22 Ntable H.323 Frum Events January 2002: IMTC apprves the frmatin f the H.323 Frum as a part f its rganizatin May 2002: H.323 Frum kick-ff in Geneva and a web site June 2002: H.323 Frum at Cllabrative East August 2002: Certificatin levels 1a/1b defined September 2002: First wrldwide H.323 Frum vide cnference was held Octber 2002: H.323 Frum at VON Octber 2002: ETSI and OSP users grup supprt H.323 Frum Nvember 2002: H.323 Frum at Cllabrative West Nvember 2002: First H.323 Frum industry cnference March 2003: Secnd wrldwide H.323 Frum vide cnference was held 22

23 Additinal Infrmatin Packetizer H.323 Frum OpenH