Dear Mr. OKUBO:
With respect to the report (APC-1425) of the Cannes meeting, I would appreciate if you would add the following for the completeness of the report:
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Section 5.5.4 H.225.0 V3 Annex G (GK to GK Communications)
APC-1385 [AT&T] "Framework for H.323 Inter-Gatekeeper Communications"
Mr. Roy also pointed out the following:
* H.323 signaling schemes that were developed for H.323v1 in view of the LAN-based single GK model (signaling schemes in H.323v2 also remain almost the same so far the inter-GK communication is concerned) may not be good enough to satisfy all needs when it is applied in the context of multiple gatekeeper environment with different inter-GK architectures: Distributive, Centralized, and Hybrid (Distributive + Centralized). * Each inter-GK architecture may need different signaling schemes in order to optimize the use of communication resources especially in the context large networks for both connectionless and connection oriented networks.
APC-1422 [Intel] "Proposal and General Comments for Inter-Gatekeeper Communications"
During the discussion of Intel's contribution, Mr. Roy also pointed out that this proposal appears to have the following limitations:
* The relationship between the zone (or internal) and the border (or domain) gatekeeper is not defined: is it hierarchical or what? * Does it mandates the use of proprietary protocols between the zone (or internal) and domain (or border) gatekeeper? * The relationship between the multiple domain gatekeepers has not been defined: how communications occur in view of the multiple domain gatekeepers? * As if it mandates a specific implementation scheme that may limit its scalability once one starts to use the gatekeeper discovery, address translation, admission control, and/or bandwidth/QOS control signaling messages for this particular architecture while a large network that may use highly distributive, centralized, and hybrid inter-GK architecture.
Therefore, Mr. Roy has the following view:
* It requires a fundamental understanding of the logical relationships for inter-GK communications in view of the distributive, centralized, and hybrid inter-GK architecture that might be scaleable in view of large networks for both connectionless and connection oriented networking environment. * AT&T's contribution (APC-1382) has been the first step in that direction.
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I would appreciate a prompt action from your end.
Sincerely,
Radhika R. Roy AT&T Room 1K-330 101 Crawfords Corner Road Holmdel, NJ 07733 Tel: +1 732 949 8657 Fax: + 1 732 949 8569 e-mail: rrroy@att.com
From: Sakae OKUBO[SMTP:okubo@GITI.OR.JP] Reply To: Mailing list for parties associated with ITU-T Study Group 16 Sent: Thursday, June 25, 1998 11:49 PM To: ITU-SG16@MAILBAG.INTEL.COM Subject: Report of the Cannes meeting
Dear Q.12-14/16 experts,
I have uploaded draft report of the Cannes meeting (APC-1425) at the /Incoming directory.
ftp://standard.pictel.com/avc-site/Incoming/APC-1425_w97.zip /APC-1425_w95.zip
w97 is original, editing TD-20 (Q.12), TD-21 (Q.13) and TD-22 (Q.14) with Word 97. w95 is a version converted into Word 6/95; there are obvious errors in section numbering and figures.
Please review it in a week time, and give me any comments. I will then complete it, uploade it at /9806_Can directory and send its copies to the SG16 management.
Best regards,
Sakae OKUBO (Mr.)
Waseda Research Center Telecommunications Advancement Organization of Japan (TAO) 5th Floor, Nishi-Waseda Bldg. 1-21-1 Nishi-Waseda, Shinjuku-ku, Tokyo 169-0051 Japan Tel: +81 3 5286 3830 Fax: +81 3 5287 7287 e-mail: okubo@giti.or.jp