Question(s):

1

Meeting, date:

  Biel-Bienne, 17-20 May 2005

Study Group:

16

Working Party:

2

Source:

Rapporteur, Q.1/16 (P. LUTHI)

Title:

LS on Call Setup time improvement methods for H.324

LIAISON STATEMENT

To:

3GPP TSG SA4 and IMTC 3G-324M Activity Group

Approval:

ITU-T Q.1/16

For:

Comment

Deadline:

18 July 2005

Contact:

Sasha Ruditsky

RADVISION, Inc.

USA

Tel: +1 201 689 6343

Email: sasha@radvision.com

Please don't change the structure of this table, just insert the necessary information.

 

ITU-T Q.1/16 would like to thank you for your recent liaison statements providing useful feedback on the maximum CCSRL-SDU size and the WNSRP procedure.

Q.1/16, responsible for maintenance of ITU-T Rec. H.324, requests your input on an issue relating to H.324/M call startup time.

Please find attached two contributions from our 19-20 May 2005 meeting in Biel-Bienne, Switzerland.  

The intent of these contributions is to reduce the H.324 call startup time required by H.324 Annex C (H.324M). These two documents appear to contain alternative proposals to address this issue.

We solicit your input on the attached contributions and whether both solutions should coexist in the standard. This work will be further considered at our July/August 2005 meeting.

Excerpt from the meeting report concerning these two documents:

4.4   Proposal of Bearer-based Fast Session Setup Procedure to H.324 (FSS)

Q1-D16 was presented and a discussion followed. This proposal is based on AnswerFast 4 presented at the November meeting of SG16 and it should not break interoperability with deployed systems. It was mentioned that it could also be used for PSTN and ISDN H.324 terminals. The group agreed that, if the industry supported such a solution, Q.1 would not be opposed to progress this work. Q.1 would welcome contributions to reduce the complexity of the mechanism presented and to harmonize FSS with other solutions (e.g. Fast Start) if possible. Q.1 would also welcome contributions stating support or comments from manufacturers for FSS. The group decided to send a liaison statement to 3GPP TSG SA4 and IMTC 3G-324M AG asking them to provide feedback and comments on this proposal. The text of the LS is shown in Q1-D21.

7.2   Automatic Connection Negotiation (ACN)

Q1-D11 (AVD-2738) was presented and a discussion followed. This contribution proposes a solution to reduce call setup time and it shares similarities with the FSS proposal. It was pointed out that this proposal seems to be simple to implement, but that some clarifications (flow charts, etc.) are needed to better understand the details of the proposal. As for the FSS proposal, the group agreed that, if the industry supported such a solution, Q.1 would not be opposed to progress this work. Q.1 would welcome contributions stating support and comments from manufacturers for ACN. One issue to be addressed is to decide whether 2 solutions are needed or if the group should choose one proposal. The group decided to send a liaison statement to 3GPP TSG SA4 and IMTC 3G-324M AG asking them to provide feedback and comments on this proposal. The text of the LS is shown in Q1-D21.

 

Attachments:

1) Q1-D11 - Automatic Connection Negotiation (ACN)

2) Q1-D16 - Proposal of Bearer-based Fast Session Setup Procedure to H.324 (FSS)

 

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