20071024 VSWG Conference Call Minutes

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Call Dates/Times: 24 October 2007 2000 UTC ~~and 25 October 2007 0600 UTC~~

Although two calls were scheduled, no-one dialed in to the second call.

Prepaid Roaming

[edit] Participants

Representatives of the following companies attended the calls:

CDG
Iusacell
Qualcomm
Sprint
Syniverse
Telecom NZ
VeriSign
Verizon

[edit] Reference Material

v0.1 of the Prepaid Roaming reference doc.

[edit] Discussion

We reviewed the v0.1 document. In general, call participants were happy/OK with the content. Specific discussion points are listed below, with numbers referring to sections in the document.

4.1 (Dial Plan Support) - Operators expressed interest in the potential for E.164 number normalization of dialed digit strings to be carried out by RSP. Apparently Prepaid Applications may not be super-flexible in their dial plan definitions. RSP comment that the proposed modification is roughly equivalent to the TLDN formatting they can already do. Note that number normalization alone may not relieve the prepaid application of the need to distinguish between different serving networks - different rates may be in effect for calling the same number depending on serving location.
4.2 (Terminating Call Charging) - Tentative approval for (recommended) HLR modification approach, although likely to depend on individual vendors/operators. Comment made that an existing RSP offering for prepaid roaming is similar to the approach described in 4.2.1
4.3 (Announcements) - Agreement that tones only (the recommended approach) should provide sufficient information to customers.
4.4 (Account recharge while roaming) - Although the recommended SMS-based approach seems OK, there was interest on the call in learning more about approaches where a roamer can purchase recharge cards belonging to the serving operator, then have them credit their own home prepaid account. Action: Daniel to follow up with the two companies mentioned on the call - Sepomo & Emida/Debisys to see what they may be able to offer. Noted that the CDG role will not be to enter into any agreement with a third party, but rather to provide these third parties with a forum to promote their capabilities to the operators, who will individually make the deals.
4.5 (Signaling Link Occupancy) - Comment made about potential increase in message size due to inclusion of trigger in subscriber profile. This could potentially cause the resulting message to exceed the MTP limit (~272 Octets). Since segmentation and reassembly is not widely supported in roaming communication this may need further investigation. A potential solution is to remove other parameters from the message which are not absolutely necessary.
4.6 (RSP Support) - Note this is a pre-requisite to any IS-826 deployment between operators that are connected via an RSP. RSPs today do not have the ability to pass IS-826 messages - this would have to be added.
5.1 (Roaming Agreement) - The document is perhaps too optimistic when it says that no changes to the roaming agreement will be needed. At the Seoul IRT, operators felt they would need to wait to see the impact as we moved closer to a real commercial agreement to provide prepaid roaming.
Operator Sponsor - We are in need of an operator sponsor for this work item. For more information about what is involved in being a sponsor, or to volunteer in this capacity, contact Libby
Executive Summary - A request received after the call was for this document (and all other CDG ref docs) to include an executive summary.