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View Full Version : [Request] Virtual Roaming Systems for GSM, GPRS and UMTS


zefs
2012-10-25, 03:50 PM
Hi all,

If anyone has this book in pdf, please share.

Virtual Roaming Systems for GSM, GPRS and UMTS : Open Connectivity in Practice

Arnaud Henry-Labordere
ISBN: 978-0-470-68262-3
Hardcover
338 pages
November 2009

Link: http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470682620.html


(http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470682620.html)
zefs
2012-10-25, 03:53 PM
I can't open my own attached file... :confused:
This is awkward.
poohead31
2012-10-26, 01:12 PM
I can't open my own attached file... :confused:
This is awkward.
Haha. Yep. You need 15 Reputation (I think) to view attachments. Looks like you can post them with anything less than 15. Very awkward.
zefs
2012-11-05, 10:12 PM
OK, since nobody has this book, maybe someone can point me to the right and available resources on this subject?

Thank you.
dietcha
2012-11-06, 09:57 AM
OK, since nobody has this book, maybe someone can point me to the right and available resources on this subject?

Thank you.

130$ to buy this book!

Some experts in this forum such as lab, Mike,... can help me but seem they don't reply!

Poor you.
zefs
2012-11-06, 09:14 PM
I don't have 130$, though it can be found at a lower price.

Why I am requesting this book is because we discovered an interesting issue with some roaming subscribers, google gave me a little preview, where I kind of discovered the same behavior described in the book. The preview is not enough as it stops at the most interesting... :) Searching in the 3gpp standards but no results.

Here is the thing:
Roaming subscriber comes in visit. He wants to activate a PDP.

Facts:
1. The authentication phase is successful, gets the triplets from HPLMN HLR. Good. Communication between SGSN and HLR is based on E.164 numbering plan.
2. GPRS location update ... fails, cause: Unexpected data value (this error has no precise meaning).
But the interesting fact is that the HPLMN HLR is not using E.164 numbering, but E.214 numbering plan when announcing this error back to SGSN, and the number is permanently changing.

Had anyone this kind of behavior?