UE Registration Procedure/Network Attach Procedure

A UE needs to register with the network to receive services that require registration. The always on IP connectivity for UE of the EPS is enabled by establishing a default EPS bearer during network attachment. During the attach procedure, the UE may request for an IP address allocation.

Please refer to the below figure for the attach procedure. Since, Iam not familiar with the network messages that are exchanged, I haven't mentioned in the below diagram.

UE Conformance Testing with TTCN-3

UE Conformance Testing

1> Download eNB TTCN3 test suite which is available in the below link:
http://www.3gpp.org/ftp/tsg_ran/WG5_Test_ex-T1/TTCN/Deliveries/LTE_SAE/

2> The testing of UE conformance i.e L2/L3 is according to the 3GPP specifications provided
L3 -> RRC:36.331

L2 -> PDCP: 36.323
              RLC:    36.322
              MAC:  36.321
Download above specifications from below 3GPP link
http://www.3gpp.org/ftp/Specs/html-info/36-series.htm

3> Inorder to run the TTCN3 testsuite you need TTworkbench IDE and corresponding plugins which is provided by TTworkbench (http://www.testingtech.com/ ), please look into the site for more details..

4> The TTCN3 test cases are defined as per 36.523-1/2/3 3GPP specification