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Telecom GSM Update Location Flow

Telecom GSM Update Location Flow :

GSM UPDATE LOCATION FLOW WINMEEN

  1. When subscriber switch on the mobile, The Mobile station finds the near by MSC/VLR.
  2.  MSC/VLR will do the MGT validation using MCC and MNC which is present in the IMSI. And sends the SAI request to HLR.
  3. HLR sends the Triplets to MSC/VLR which consists RAND, SRES and KC.
  4. MSC/VLR checking the received Triplets with their records. If its matching with their records, MSC/VLR sends the Update location request to HLR.
  5. Then HLR sends the ISD to MSC/VLR which consists Supplementary services, Teleservices and Camel subscriber information.
  6. After receiving ISD, MSC/VLR will send Return result ISD to HLR.
  7. Now HLR will check Old MSC/VLR for Cancel location.
  8. Old MSC/VLR sends the Cancel location acknowledgement to HLR.
  9. Finally HLR sends the Update location response to the MSC/VLR. Mobile station will latch in network.

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