spec: use 2g example throughout the document
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@ -26,14 +26,14 @@ enhancement.
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== Summary of Existing Location Updating Procedures in RAN and CN
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The SIM is provisioned with the IMSI (3GPP TS 23.008 section 2.1.9) and
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cryptographic keys, that it uses to authenticate with the network. In the
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Remote Access Network (RAN), the IMSI is sent over the air interface and then
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transmitted to the Core Network (CN), where it is validated by the HLR/HSS.
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The involved components vary by the generation of the network and whether the
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SIM is attempting a Circuit Switched (CS) or Packet Switched (PS) connection.
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But the principle is the same and looks like <<figure-imsi-regular>> for 2G CS
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Location Updating with IMSI.
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The subscriber's SIM is provisioned with the IMSI and cryptographic keys of a
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subscriber, after the subscriber was added with the same data to the HLR/HSS.
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In the Remote Access Network (RAN), the IMSI is sent over the air interface and
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then transmitted to the Core Network (CN), where it is validated by the
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HLR/HSS. The involved components vary by the generation of the network and
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whether the SIM is attempting a Circuit Switched (CS) or Packet Switched (PS)
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connection, but the principle is the same. This document uses 2G CS Location
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Updating for reference, as in <<figure-imsi-regular>>.
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The IMSI is transmitted in the Location Updating Request from ME. The VLR
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needs an authentication challenge specific to the secret keys on the SIM to
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@ -108,9 +108,13 @@ msc {
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}
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----
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== Required Changes
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=== SIM Provisioning
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=== Successful Location Update With Pseudonymous IMSI
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=== Next Pseudonymous IMSI Arrives Via SMS
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