Revision 7b0dbb96
Added by osmith about 4 years ago
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provided in <<reference-src>>. |
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The SIM applet registers to a suitable SMS trigger (3GPP TS 03.19, Section |
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6.2). When an SMS from the HLR in the format of <<sms-format>> arrives, the
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applet must verify that the SMS is not outdated by comparing imsi_pseudo_i from
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the SMS with the last imsi_pseudo_i that was used when changing the IMSI |
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6.2). When an SMS from the HLR in the structure of <<sms-structure>> arrives,
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the applet must verify that the SMS is not outdated by comparing imsi_pseudo_i
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from the SMS with the last imsi_pseudo_i that was used when changing the IMSI
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(initially 1 as in <<hlr-imsi-pseudo-i>>). The new value must be higher, |
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otherwise the SMS should not be processed further. |
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IMSI (higher imsi_pseudo_i, see <<hlr-imsi-pseudo-i>>) and related |
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imsi_pseudo_i value. |
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[[sms-format]]
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==== SMS Format
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[[sms-structure]]
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==== Next Pseudonymous IMSI SMS Structure
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* min_sleep_time |
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* imsi_pseudo |
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* imsi_pseudo_i |
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// FIXME |
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IMPORTANT: This is a draft. The structure is likely to change after the |
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reference implementation phase. |
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.Next pseudonymous IMSI SMS structure |
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[packetdiag] |
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---- |
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{
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colwidth = 32 |
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0-31: IMSI_PSEUDO_I |
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32-63: MIN_SLEEP_TIME |
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64-119: IMSI_PSEUDO |
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120-127: PAD |
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} |
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---- |
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IMSI_PSEUDO_I: 32 bits:: |
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See <<hlr-imsi-pseudo-i>>. |
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MIN_SLEEP_TIME: 32 bits:: |
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Amount of seconds, which the SIM applet should wait before changing to the new |
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pseudonymous IMSI. Since it is unclear when the SMS will arrive (ME might be |
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turned off), this is a minimum amount. |
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IMSI_PSEUDO: 60 bits:: |
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Telephony Binary Coded Decimal (TBCD, 3GPP TS 29.002) version of the next |
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pseudonymous IMSI. |
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PAD: 8 bits:: |
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Padding at the end, should be filled with 1111 as in the TBCD specification. |
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== Error Scenarios |
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=== Next Pseudonymous IMSI SMS is Lost |
Also available in: Unified diff
docs/spec: SMS structure