Presentation Transcript

Core Network Evolution Core network has been evolving in parallel with RAN’s evolution from ATM to IP based integrated NW (All-IP) by phased approach complied with traffic nature, cost-effectively 2001 CS traffic dominant Integrated CS/PS ATM Network 2004-5 PS traffic increased Separated CS/PS Networks by now Further PS increase Integrated CS/PS IP Network Phased approach toward all-IP core network CS: Circuit Switch PS: Packet Switch 2001 2004-05 2009 201x Launch 3G Separated Integrated PS/CS LTE handling Integrated CS/PS CS/PS NWs IP Network End to end full-IP ATM Network ATM based NW IP based NW Service integration between CS and PS Dominant CS traffic Increase of PS traffic (i.e. voice) May 18, 2010 Seizo ONOE Copyright© 2010 NTT DOCOMO, Inc. All rights reserved 16

Network Evolution Plan for Core Network AIPN Development 2009- CN: Introduction of CS/PS domain integrated IP Network RAN: Wide spread of IP-based RAN CS/PS domain integrated IMS IP Network IMS CS Network IMS GMSC GGSN SIP protocol Core Network MSC MSC CS-GW SGSN CS-GW IP IP ATM ATM IP Usual RNC RNC RNC RNC Radio 3G protocol Access ATM IP IP IP IP IP IP L1-L3) Network NB NB NB NB NB NB NB Node B User UE Equipment CS services PS services May 18, 2010 Seizo ONOE Copyright© 2010 NTT DOCOMO, Inc. All rights reserved 17

Network Evolution Plan for Core Network AIPN Development 2010- CN: Introduction of EPC (CS services: CS FallBack) RAN: Introduction of LTE CS/PS domain integrated IMS IP Network GGSN P-GW Core Network MME CS-GW CS-GW SGSN S-GW EPC RNC RNC RNC Radio Access Network NB NB NB NB eNB NB eNB NB eNB NB CSFB LTE User Equipment CS services PS services May 18, 2010 Seizo ONOE Copyright© 2010 NTT DOCOMO, Inc. All rights reserved 18

Network Evolution Plan for Core Network AIPN Development 201X- CN: Spread of EPC (CS services:IMS based VoIP over LTE) RAN: Spread of LTE CS/PS domain integrated IMS IP Network GGSN P-GW Core Network MME CS-GW CS-GW SGSN S-GW EPC RNC RNC RNC Radio Access Network NB NB eNB NB eNB NB eNB NB eNB NB eNB NB eNB LTE User Equipment CS services PS services May 18, 2010 Seizo ONOE Copyright© 2010 NTT DOCOMO, Inc. All rights reserved 19