Next Generation Networks

Transcription

1 Next Generation Networks Ericsson s Concepts and Visions Darko Šobar Ericsson Nikola Tesla, Croatia darko.sobar@etk.ericsson.se 1

2 Rapid Market Transformation We believe a really big tornado is forming on the horizon. Bigger than the world s telephone network, more revolutionary than the Internet and with the potential to generate more wealth than the PC industry. The next tornado will be the deployment of a broadband, packet-based public network. Paul Johnson, BancBoston Robertson Stevens 6/98 2

3 Rapid Market Transformation Convergence at multiple levels Suppliers Operators Technology High bandwidth requirements driven by increased data traffic Evolution of the New Public Network The New Telecoms World Voice services (narrowband) --> Multi-services (broadband) Several networks --> One, end-to-end converged network Next generation services 3

4 Next Generation Networks Mobile Networks Voice over Time Division Multiplexing (TDM) PSTN Voice over frame relay and voice over Voice over NewIP Multiservice Network Voice over public Internet Public IP Networks Frame relay,, X.25 Internet Private Enterprise Networks Public voice network Public data network In March 1999, ATT announced that it is installing its last class four circuit switch, and from now on it will spend 6 BUSD a year on migrating its network to packet technology. 4

5 The Services Cube Telecom (Voice centric, real time, QoS) Mobile telephony, cordless,... Wireline telephony Bridging/Migrating Bridging/Migrating IMT-2000 (WCDMA/ EDGE ) W-L Next Generation Network Convergence Carrier-class real time IP/ W/L data Datacom (Data centric, non-real time, best effort) Mobility Mobile data 5

6 Increased Subscriber Growth Fixed 800 Subscribers (millions) Cellular Internet

7 Data Continues to Grow as a Percentage of Total Network Traffic Proportional Voice and Data Network Traffic, Worldwide, % 80% 60% 40% Voice IP 20% 0% Source: the Yankee Group,

8 Packet Switch Performance Grows More Rapidly than Circuit Switch Months Months to Double Performance, Circuit Switches Switches Routers 8

9 Access Technologies Deployment Line Index POTS ISDN ADSL

10 xdsl Volumes Installed DSL Base (MLines) Asymmetric DSL Symmetric DSL

11 Multiservice Networks Consist of: CPE Service-Enabling Applications Access Core Network Transport 11

12 Next-Generation Network Structure Today Single-service networks Services Future Multi-service network S PLMN PSTN/ISDN Data/IP Cellular Networks Mobile Cellular Mobile CATV Content Service Network S S S Connectivity/ Backbone Network Content Access Networks Access, Transport & Switching Networks 12

13 Next Generation Network Architecture M A N A G E M E N T Applications Control Trans- Switching RN PLMN Servers IP Application Servers HLR SCP PSTN/ ISDN Servers MM Com. Server H.323/SIP Connectivity Backbone Network Other IP/Multi-Service Networks Other Telephony Networks Wireline Access Wireless Network Access Network Wireline Access Wireline Network Access Network Intranet L RN Media Gateway Resource Node 13

14 Why DWDM? Resolve fiber exhaustion in existing network New business opportunities via leasing of dark fibers Generic, client independent transport network. Scaleable in capacity upon need. 14

15 Why not SDH? TM IRE DXC TM SDH network cannot be scaled as much as DWDM SDH can only carry certain traffic types Larger electrical DXCs expensive and difficult to realise. Long routes consume large amounts of equipment. STM-64 (10Gb/s) only provides four times capacity, and could be overwhelmed in two years 15

16 New services and traffic types 16 PDH STM-1/STM-4/STM-16/STM-64 FDDI GigabitEthernet ESCON IP /DTM DWDM offers a universal transport layer for all traffic types DWDM allows each layer to be right sized for its own traffic; saves on unneeded conversion equipment DWDM can adapt to tomorrow s traffic mix

17 WDM vs DWDM Yesterday: WDM Wavelength Division Multiplex Two Traffic Channels per Fibre Today: DWDM Dense Wavelength Division Multiplex N 16, 32, 64 Traffic Channels per Fibre 17

18 DWDM network evolution Point-to-Point to enhance capacity and solve fiber exhaust. Point-to-Point with traffic protection features added. Optical ADM Ring topologies, More advanced - Wavelength reuse, switching capabilities, i.e Optical Networking. 18

19 Two complementary IP Backbone Strategies IP over SDH/SONET - Gigabit Routers a basic high bandwidth router-to-router link network,... requires high-capacity L3 routers IP over Switched Link Layer - & MPLS an advanced high capacity switched network that efficiently runs IP,...the network takes advantage of key features of such as QoS and connection-orientation, uses the switch fabric to scale performance of the network nodes enables a multi service network, Ships In The Night 19

20 The connectivity network IP based, based or with a mix of both depending on the needed services IP backbone: Gigabit/Terabit Routers backbone: High capacity & IP (MPLS) Switches Carrier Class Service - Reliability - Security -QoS 20

21 Why!? can carry multi services with different QoS requirements (CBR, ABR, VBR ) High capacity in back bone networks. Efficient forwarding of IP-packets (MPLS) Cost benefits equipment and operations cost savings transmission cost savings 21

22 Price/performance Price per OC-3/STM 1 port Traditional router technology MPLS/IP over

23 Typical IP/ Scenario 23

24 MPLS/ Scenario R R R R LSR R R R R 24

25 Initial motivation for MPLS was speed and cost of switching G hop-by-hop LDP was the final solution G new algorithms and new ASICs changed that OC48c shipping, OC192c by the end of the year G Label switching only reduces cost of the IP address lookup and forwarding decision, ie the impact on the cost of the whole system remain modest, ie. cost no issue G applications for MPLS; Traffic Engineering, VPNs, support for DS/QoS, Integration of,... Multi Purpose Label Switching [Yakov Rekhter] 25

26 MPOA and CSI compared to MPLS (1) MPOA defined for private networks, CSI have proprietary additions to MPOA VPN and private addresses. MPLS defined for public networks. MPOA and CSI are cut-through technologies, i.e. only. MPLS defined for all infrastructures. Mix of L2 and L3 forwarding, set up time for shortcut required. Forwarding on Labels, no setup time. 26

27 MPOA and CSI compared to MPLS (2) Number of connections on the order of O(N 2 ) Number of connections in the order O(N). Connection setup capacity has to be high and fast. Connection setup capacity moderate. Uses standard Forum signaling. Specification by Forum. CSI intend to hit market early. Uses the light-weight LDP protocol. Specification by IETF. LDP informational RFC this summer. 27

28 Why IP/SDH!? Virtually all services are going IP IP/SDH Growth in processor power makes it possible to route IP packets at wire speed. Why pay the cell tax and then SDH pointer tax? Cost benefits: equipment and operations cost savings transmission cost savings 28

29 Today s situation Internet GW Intranet L IP Network FR/ Network Intranet L GW AS AS GW GW TE TE PSTN/ISDN TE TE Other National/International Telephony Networks 29

30 Traffic situation in backbone/tandem networks growing internet traffic (20-25% in some networks) interconnect traffic increased traffic volume/complexity More switching and processing capacity required Capacity problems! 30

31 Migration step 1.1 telephony backbone for increased capacity, flexibility and manageability Internet IP Network GW Intranet L FR/ Network Intranet L GW AS GW NGS NGS NGS Backbone Network NGS AS GW Other National/International Telephony Networks 31

32 Migration step 1.2 Common backbone for telephony and the growing IP access traffic Internet GW Intranet L IP Network Intranet L GW AS GW NGS TS NGS Backbone Network NGS TS NGS AS GW Other National/International Telephony Networks 32

33 Migration step 2.1 The full-blown Server/ architecture for connection of existing Local Exchanges Internet GW Intranet L Intra net L GW AS GW TS IP Network TS Network TS AS GW Other National/International Telephony Networks 33

34 Migration step 2.2 New Access Nodes for green-field and replacement Internet GW Intranet L Intranet L GW AS GW TS IP Network TS Network TS AS GW Other National/International Telephony Networks 34

35 Traffic variations for voice & data traffic Traffic intensity DYNAMIC TRUNKING (y) Needed max. capacity VOICE+DATA Needed max. capacity VOICE VOICE DATA Time 35

36 Additional revenues from other applications GSS Data Maximum available capacity IWU network Capacity Capacity used for other applications Which traffic/services? Estimation of value? Bandwidth allocation Bandwidth release bandwidth allocation/release Capacity used for voice Quick response to fast growing traffic High utilisation of allocated resources Time in seconds, minutes, etc 36

37 Handling of Telephony in connectivity networks Signaling and control principles Network Network Data Data Base Base Q.931 etc. V5+ etc. ISUP Telephony Telephony Server Server Call Control ISUP Telephony Telephony Server Server MEGACOP Connectivity Network Bearer Control ISUP Data Data Other Operator s Network Data Data 37

38 Standardisation and Interworking MGCP ITU SG 16 - IETF recommendation H.248 AXE AXE Telephony Telephony Server Server BICC Other Other Telephony Telephony Server Server Bearer Independent Call Control ITU SG 11 Based on ISUP Proprietary RSS signalling Transported to TS over PVC AXD AXD IWU IWU IWU IWU RAU RSS RAU V5.2 AXD AXD IWU IWU BGC /IP Bearer Group Control PNNI / B-ISUP 38

39 Homes and SOHO, Current Access IP Network Narrowband (Remote) Access Server RSU RSU PSTN/ISDN Modem Modem 39

40 Homes and SOHO Emerging Access IP Network ISDN/ ISDN/ NMDS NMDS ADSL ADSL DSLAM DSLAM Conc. Conc. Network Modem Modem RSU RSU PSTN/ISDN 40

41 Homes and SOHO Emerging Access L L ISDN/ ISDN/ NMDS NMDS Modem Modem ADSL ADSL DSLAM Remote Remote GateWay Conc ADM/XC IP Network Network ISDN/ ISDN/ NMDS NMDS ADSL ADSL DSLAM DSLAM RSU RSU PSTN/ISDN Modem Modem xdsl with combined or inband voice 41

42 Homes and SOHO s Target Access Network Home Network e-box IP Only ADSL ADSL L ISDN/ ISDN/ NMDS NMDS Modem Modem 3G 3G Remote Remote PSTN PLMN ISDN Servers Servers MM Com. Other Servers IP H.323 Servers ISDN/ ISDN/ NMDS NMDS Home Network e-box IP Only ADSL ADSL DSLAM DSLAM RSU RSU 3G 3G Edge Edge Node Node Connectivity Network UMTS Access PLMN Access Other IP networks Other Telephony Modem Modem 42

43 Small and Medium Enterprises Current Access n x 64, E1 (xdsl) Leased Line Router Router IP Network E1, PRA, (xdsl) Modem Modem Modem Modem Modem Modem RSU RSU PSTN/ISDN 43

44 Small and Medium Enterprises Emerging Access IP Network xdsl xdsl Conc. Conc. Network DSLAM DSLAM RSU RSU PSTN/ISDN ISDN ISDN Introducing Symmetric DSL Services 44

45 Small and Medium Enterprises Emerging Access Soft xdsl xdsl xdsl xdsl ISDN ISDN Leased Line 3G 3G Remote Remote Symmetric services In-band Voice DSLAM DSLAM GateWa y Conc ADM/XC IP Network Network RSU RSU PSTN/ISDN ISDN ISDN Access Nodes with Open Interfaces for Multi-services, Soft s & In-band Voice 45

46 Multi Media Server Small and Medium Enterprises Target Access SME Network xdsl ISDN ISDN 3G 3G Remote Remote PSTN PLMN ISDN Servers Servers MM Com. Other Servers IP H.323 Servers L xdsl DSLAM DSLAM RSU RSU 3G 3G Edge Edge Node Node Connectivity Network UMTS Access PLMN Access Other IP networks Other Telephony ISDN ISDN 46

47 Current Large Enterprise Access to the Public Infrastructure AU Managed LL,, FR AU L Branch Office L IP Network L Corporate Office PSTN/ISDN Branch Office Modem Tele Worker 47

48 Emerging Large Enterprise Access Network L AU Corporate Office AU Branch Office SDH LMDS xdsl E1 IMA xdsl AU L AU SDH Ring & TDM Other Operators ADM/ ADM/ XC XC Switch IP Network Managed LL,, FR GateWa y PSTN/ISDN 48 Modem Tele Worker

49 Large Enterprise Target Access Network L AU Corporate Office AU Branch Office SDH LMDS xdsl 3G 3G E1 IMA xdsl L 3G IP & Telephony Connectivity SDH Ring 3G Home Network Tele Worker 3G Remote Other Operators 3G Edge Node PSTN PLMN ISDN Servers Servers Connectivity Network UMTS Access MM Com. Other Servers IP H.323 Servers PLMN Access Other IP networks Other Telephony 49