This test case is used for validating the components of an EPC or an eNB for a valid attach procedure.

In this test case, ABot can simulate the eNB and UE and any other node of the 4G EPC like MME, SGW, PDN-GW, HSS and PCRF. The eNB and UE sends an Initial Attach request message with a valid IMSI value. The eNB and UE receives an Attach Accept message, in an ideal case. The attach procedure is done with NAS Integrity Algorithm ie.  UE has valid security parameters, the Attach Request message shall be integrity protected by the NAS-MAC in order to allow validation of the UE by the MME.

The scenario executed in this test case is Initial Attach with IMSI and PDN Connectivity Request.

The procedures completed in this test case are –

  • Diameter Capabilities Exchange
  • S1-Setup
  • Initial UE Message
  • Authentication Information Retrieval
  • Authentication procedure(AKA)
  • Tunnel Management
  • IP CAN Session
  • PDN Connectivity
  • Initial Context Setup
  • Default EPS Bearer Context Activation

This test case is executed as per 3GPP TS 23.401 and 3GPP TS 24.301

 Protocol Used  Nodes Involved  Interfaces Involved
S1AP, Diameter, GTPv2C, NAS  eNodeB, MME, SGW, PGW, PCRF, HSS  S1-MME, S11, Gx, S5/S8, S6a