Umts Utran Call Flow Scenarios - Cs And Ps 2h6t62

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For ease of understanding the Call Flow Scenarios will be split into 6 parts. 1. Node B Initialisation 2. Cell “Camp-on” / Location Update 3. Circuit Switched Call set-up The following steps need to be executed in order for a mo call to complete  RRC Connection Setup  Service Request  Security Procedures (Identity / Authentication / Security mode)  Call Setup Request  Radio Link and RAB Configuration  Call Connection 4. Circuit Switched Call tear-down The following steps need to be executed in order for the mobile to tear-down the call.  Initiate Call Release  Initiate Iu Release Procedure  Release Iu Connection to MSC for UE  Release RRC Connection to UE  Delete Radio Link Resources in UTRAN  Delete Radio Link Resources in UTRAN 5. Packet Switched Call set-up The following steps need to be executed in order for a mo call to complete.  Establish an RRC connection to the UTRAN  Establish an Iu connection to the CN  Make an Attach Request  Carry out Security Procedures  Complete the Attach  Request PDP context activation  Set-up RAB’s for the connection  Create GTP connections and activate PDP Context at the GGSN  Data Transfer 6. Packet Switched Call tear-down The following steps need to be executed in order for a mo call tear down to complete.  PDP Context Deactivate request from UE  Radio Link Setup  Iub Transport Bearer Setup  DCH-FP Synchronization  Connection Setup  Attach Procedure  Authentication and Security Procedures  PDP Context Activation Procedure  Radio Link and RAB Configuration  Data Transfer to read more....

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