1. 1 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com Connecting to the IMS LTE / HSPA / EPC ‘knowledge nuggets’ Neil Wiffen - nwiffen@red-banana.org More free downloads at www.red-banana.org Public Seminar details – www.4g-seminar.comnwiffen@red-banana.orgwww.red-banana.orgwww.4g-seminar.com

2. 2 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com Network connectivity comparison Circuit Switched Core Packet Switched Core BSCRNC Evolved Packet Core (EPC) BTSNBENB GSM device GPRS device UMTS device LTE device TDMA W-CDMA OFDMA / SC-FDMA

3. 3 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com R8 - Evolved Packet System HSS EPC External networks and services LTE-UE ENB E-UTRA E-UTRAN S-GWMME EPS Service Control P-GW (LTE)

4. 4 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com LTE / EPC Basic Architecture MME P-GW HSS External Networks and Services User data Control signalling User Data and Control signalling LTE-UuS1-U S1-MME S11 S6a S5 GxcGx SGi Rx X2 (C+U) MME S10 EPC Other PLMN S8 S-GW PCRF

5. 5 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com Combined General Architecture (R8) HSS External PS Networks and Services Mc Other PLMN RNC Uu SGSN MGW Nb Gs IuPS IuCS Iub Gr/S6d EIR F Gf D GGSN Gn Gi Gc C MSC Server MSC Server Nc External CS Networks and Services Mc RNC Iur MME P-GW MME S-GW PCRF Other PCRF Gxc Rx Gx S9 UmAbis BSC Gb A A SGi LTE-Uu S1-U S1-MME S11 S6a S5 X2 S10 S8 S3 S13 S4 SGs IuCS Other PLMN IMS Platform

6. 6 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com Connecting to IM CN (1) MMESGWPGW HSS 1. Establish RBs 2. Register with CN & request ‘PDN service’ 3. Retrieve Security and subscription parameters 4. Authenticate SIM and secure connection 5. Accept Registration 6. Update location information 7. Request bearer 8. Request bearer and tunnel establishment PCRF 9. Establish QoS and charging rules 11. Forward connection details 12. Forward connection details 10. Establish bearer and GTP tunnel 13. Modify RBs P-CSCF IMS Platform 15. Register with IMS 14. Establish GTP tunnel

7. 7 LTE / HSPA / EPC knowledge nuggets Red Banana Wireless Ltd – Copyright 2013 Connecting to the IMS www.red-banana.org www.4g-seminar.com Connecting to IM CN (2) MMESGW HSS (2. Register with CN & request ‘PDN service’) 17. Request bearer 18. Request bearer and tunnel establishment PCRF 19. Establish QoS and charging rules 21. Forward connection details 22. Forward connection details 23. Modify RBs P-CSCF IMS Platform PDN 16. Request ‘IMS service’ 20. Establish bearer and GTP tunnel 25. Register with IMS PGW 15. Connect to PDN GTP tunnel 24. Establish GTP tunnel