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What are the Reasons and Scenarios Of Invalid PTMSI in GPRS

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loveleshpandya
What are the Reasons and Scenarios Of Invalid PTMSI in GPRS

Dear All,

Can anyone let me know, in case of GPRS what are the scenarios when a PTMSI can be invalid and what can be the possible reasons.
Can i get some document for my query.

THANKS in Advance....

scorpion
scorpion's picture
Interesting question....how

Interesting question....how you have analyzed this..do you have some screen shot for this

Regards

Scorpion King - Returns
www.linkedin.com/in/scottreplund

loveleshpandya
Query on Invalid PTMSI

Actually this is my query related with TLLI, which is generated through PTMSI. If TLLI is invalid may be PTMSI is invalid. In what condition?
One reason can be, SGSN has restarted but before the next authenticated radio contact the P-TMSI and TLLI known by the MS are invalid, as the P-TMSI was allocated before the SGSN restarted.
Similarly is there any other reasons of Invalid PTMSI?
Also can anyone tell me when Auxillary and Random TLLI is built by SGSN and MS respectively?

Lovelesh Pandya
SSE