TDM-over-IP Improving Backhaul efficiency

Transcription

1 TDM-over-IP Improving Backhaul efficiency Pseudowire November, 2007 Comtec Systems Co., Ltd. -1-

2 Trends Driving Circuit to Packet Migration Significant bandwidth growth Driven by new services and subscriber growth Mobile: 2G and 3G traffic increase Lower cost backhaul options available Today s TDM backhaul inefficient and expensive to scale IP/MPLS, Metro-Ethernet, Microwave, Wimax => available Easy, scalable, and Future-proof network Scalable with migration to Fiber, Copper, Wireless network Investment protection for 5-7 year depreciation -2-

3 What is TDM-over over-ip? TDM Line (T1/E1) IP Network TDM Line (T1/E1) TDM-over-IP Gateway TDM-over-IP Gateway TDM-over-IP or Pseudowire or CESoP ( Circuit Emulation over Packet ) Pseudowire transparently transports TDM Traffic, Timing & Signaling circuits through tunneling over IP network. For Cellular backhaul, Wireless backhaul, and T1/E1 Leased line Service. -3-

4 TDM-over over-ip for Cellular Backhaul * T1/E1 transparent transport over IP network. * Save 30~50% of T1/E1 Service cost. * Migration to cost-efficient Fiber, Copper, or Wireless networks 3G Node B T1/E1 TDM-over-IP Gateway 2G BTS 2.5G BTS T1/E1 Ethernet IP/MPLS Packet over SONET, Metro-Ethernet, Microwave, WiMAX Ethernet MSC TDM-over-IP Gateway DS3/OC3, OC12-4-

5 Comtec TDM-over over-ip Gateway Fully Standard compliant Pseudowire Carrier-class, leading-edge edge timing recovery & Synchronization Full OAM and demarcation Ethernet WAN (Metro-Ethernet, MPLS, DSL or Microwave) 3G Radio & WiMAX 2G/2.5G Radio Console, NMS Uplink 10/100M Tx/Fx External Clock T1/E1 Power (AC/DC) -5-

6 Comtec TDM-over over-ip Gateway: Advantages (1) 1. Carrier-class, Leading-edge edge Timing recovery & synchronization Better Jitter & wander performance than ITU-T recommendation -6- Standard compliance: ITU-T G.823, G.824, AT&T TR Clock Accuracy by TCXO, Stratum 3 Standard compliance: ITU-T G.813, GR 235, GR ppm, 16ppb or less Flexible Synchronization and Failover Clock modes: Loopback, Line Rx, External, Differential, Adaptive, Internal Clock Failover: Primary and Secondary setting Back-up PDV (Packet Delay Variation) compensation Re-sequencing Dynamic Jitter buffer operation

7 Comtec TDM-over over-ip Gateway: Advantages (2) 2. Full OAM and Demarcation Link OAM (Data link Status, Loopback) AIS OAM (Network Fail, Loss of Signal) Performance monitoring (Network delay, Packet Loss, Bandwidth) 3. Advanced L2 Switching Link Failover in 50ms (Automatic Uplink port back-up) Rate Control per port (Ingress/Egress 64k bps Granularity) Dual Software Image System Failover (Auto-reboot in System Hang-up) SNMP v1, v2 Quick system configuration by pre-configured Profile -7-

8 Comtec TDM-over over-ip: Patents & News Patents (in Korea) Patent No Transmission of TDM frame over packet network in mobile communication system Comtec TDM-over-IP on News (Light Reading May 31, 2005) Patent No Clock restoring in Packet switching Network for TDM service Patent No Network Device management by remote control Patent No Remote control Error Restoring for Network device -8-

9 Comtec TDMGW : Proven References (1) Cellular Backhaul - TDM-over-IP deployment for 2G/3G voice and Data transmission - At remote islands in Korea, in a major Mobile service Network Main Land Wireless 8*E1 TDM GW8 2G 3G Internet OCEAN ISLAND C Internet 2G 3G 4*E1 TDM GW4 Wireless 30Km 20Km ISLAND A ISLAND B Wireless 4*E1 TDM GW4 2G 3G Internet MSPP SDH Internet MSPP 2G 3G 4*E1 TDM GW4 Wireless -9-

10 Comtec TDMGW : Proven References (2) Wireless Backhaul - Supply TDMGW to Wi-Fi / WiMax Vendors in North America and Asia Internet T1/E1 TDM GW8 IP Wi-Fi or WiMAX Wi-Fi / WiMAX Wi-Fi / WiMAX IP IP TDM GW11 TDM GW41 T1/E1 T1/E1 TDM over Metro Ethernet - Samsung Networks in Korea : Supply TDMGW for E1 Leased Line Services Metro Edge E1*8 TDM Metro GW8 Access Metro Ethernet Metro TDM AccessGW8 E1*8 Metro Edge -10-

11 Comtec TDMGW : Proven References (3) Enterprise (Comtec Systems in Korea) - Voice + Data network Extension to Remote Office Internet PSTN PSTN WIFI FE TDMGW FE Router E1 nxe1 PBX Building meter WIFI Key Phone Switch FE TDMGW E1 Building 2-11-

12 Comtec TDMGW : Solution for Mobile Backhaul TDM over IP & EFM over Copper - PWE3 : TDMoIP (2G/3G voice and Data transmission) - EFMC : SHDSL 4 ports (4-pair bonding) - Lower Cost, Better Efficiency -12-

13 Thank You Mike Shim Director, Global Business Comtec Systems Co., Ltd

14 Comtec TDM-over-IP Gateway Leading-edge edge Pseudowire Technology November, 2007 Comtec Systems Co., Ltd. -14-

15 Comtec TDM-over over-ip gateway TDMGW11 1 * E1/T1 + 6 * Ethernet LAN Uplink T1/E1 External Clock Power (AC) TDMGW41 4 * E1/T1 + 6* Ethernet TDMGW4 4* E1/T1 + 2* Ethernet with Dual power Console, NMS Uplink External Clock T1/E1 Power (AC/DC) TDMGW8 8* E1/T1 + 2* Ethernet with Dual power -15-

16 Features: Hardware Features E1/T1 (RJ48c) LAN (Ethernet) Management Power Clock Certification Size (mm) TDMGW11 TDMGW41 TDMGW4 TDMGW8 1 port 4 ports 4 ports 8 ports 6 ports 10/100Mbps 2 ports 10/100Mbps (*1 port RJ45, 1 port RJ45&SFP combo) (* 2ports RJ45 & SFP combo) Console RS232c RJ45 port + Console RS232c Telco Alarm: Dry Contact (DB9) Single 100~240 VAC Dual (Hot swappable) 100~240V AC / -48V DC External Clock 1port FCC, UL, CE 280 x 44 x x 44 x 246 (fit to 19 Rack) -16-

17 Features: CES (Pseudowire) (1) 1. Pseudowire Standards compliance (IETF PWE3 CESoP & SATOP, CESoMEF, CESoMPLS) 2. Multi-Protocol compatibility (Ethernet-II, MPLS, MEF, L2TP, L2TPv3, IPv4, UDP, RTP) Standards Compliance Organization IETF ITU-T Metro Ethernet Forum MPLS Forum Document IETF-PWE3-CESoP (Structured) IETF-PWE3-SATOP (Unstructured) Y.1413 MEF 8.0 MFA

18 Features: CES (Pseudowire) (2) 3. Extending T1/E1 Circuits E1 - Line Interface : ETSI ERT Line Rate: 2048Kbps +/- 50ppm - Line Code : HDB3, AMI - Frame Format : Framed, Unframed (Full or Fractional) - Framing :. Unframed, Basic Frame Alignment. Signal Multi-frame Alignment. CRC4 MF, CAS MF - Line Impedance : Balanced (75Ω), Unbalanced (120Ω) T1 - Line Interface: ITU-T G.703, ANSI T1.102, ANSI T1.403, AT&T TR 62411, ETSI Line Rate : 1544Kbps +/- 32ppm - Line Code : B8ZS, AMI - Frame Format : Framed, Unframed (Full or Fractional) - Framing :.SF, ESF & 4kHz FDL Data Rate.T1DM, - Line Impedance: 100Ω -18-

19 Features: CES (Pseudowire) (3) 4. Full OAM and Demarcation Link OAM. Data Link Status. Remote Link Status. Local Loopback per TDM/IF. Remote Loopback per TDM/IF Performance monitoring. Average/Min/Max Network Delay. Average/Maximum Delay Variation. Packet Loss. Number of packet Send/Received. Link Bandwidth AIS OAM. Network Fail. Network Loss of Signal / Frame. Remote side TDM loss of Signal / Frame. Remote side local loopback -19-

20 Features: L2 Switching (1) 1. L2 Switching Link Failover in 50ms (Automatic Uplink port back-up) Rate Control per port (Ingress/Egress 64k bps Granularity) Rate Control between TDM and Ethernet traffic 802.1q VLAN, up to 4k Port-based VLAN, Tagged VLAN 802.1p QoS / ToS for Diffserv 4 Queues per port (WFQ, SP) Multi-stage Packet Filtering Real Time Clock and NTP -20-

21 Features: L2 Switching (2) 2. Management & Security Dual Software Image System Failover (Auto-reboot in 1 sec after System Hang-up) SNMP v1, v2 Web based EMS, Telnet, RMON 4 Groups (1,2,3,9) Image Upgrade: FTP or TFTP Access authorization, SSL/SSH Telco Alarm (TDMGW4/8) 3. Configuration Quick Configuration by pre-configured Profile Downloadable from remote profile server Protocol Telnet (CLI) SNMP (v1,2) WEB Control YES YES (Partially) YES (Partially) Monitor YES YES YES Log YES -- YES Upgrade YES No No -21-

22 Features: Timing recovery (1) 1. Adaptive Clock (Reference Clock at one end) Central Office Customer Premise TDM Equipment T1/E1 TDMGW TDM to Packet Packet Network TDMGW Queue T1/E1 TDM Equipment Line-Rx Clock Internal Clock Time Stamp Adaptive Clock External Clock Clock Select Line-Rx Clock : Reference from the line connected (TDM or Packet) External Clock : Reference from external clock source Internal clock : Reference from the clock inside -22-

23 Features: Timing recovery (2) 2. Differential Clock (Reference Clock at both ends) Customer Premise Customer Premise TDM Equipment TDMGW Packet Network TDMGW TDM Equipment T1/E1 TDM to Packet Queue T1/E1 Timing Difference Common Reference Clock Difference Add Differential Clock Common Clock : Central Office clock, SONET clock, GPS clock, & Ethernet clock Better Jitter & Wander Performance Largely unaffected by network delay variation and packet loss -23-

24 Comtec Advantages: Timing Recovery Carrier-class, Leading-edge edge Timing recovery & synchronization Better Jitter & wander performance than ITU-T recommendation Standard compliance: ITU-T G.823, G.824, AT&T TR Clock Accuracy by TCXO, Stratum 3 Standard compliance: ITU-T G.813, GR 235, GR253 Flexible Synchronization and Failover Clock modes: Loopback, Line Rx, External, Differential, Adaptive, Internal Clock Failover: Primary and Secondary setting Back-up PDV (Packet Delay Variation) compensation Re-sequencing Dynamic and Fixed Jitter buffer operation -24-

25 Advantages: Jitter & Wander (1) 1. Fully compliant with Standards : ITU-T T G.823, G.824, AT&T TR for E1 and T1 E1 standards (2.048 Mbps) T1 standards (1.544 Mbps) - Traffic Interface (G.823, Table 2) 18 µs over 1000s - PDH Synchronization interface (G Table 12) 2 µs over 2000s 5.33 µs over 100,000s - Traffic interface (T1.403, section ) 8.4 µs over 900s 18 µs over 24 hours - Reference interface (T1.101, section 7.2.1) 1 µs over 2000s 2 µs over 100,000s -25-

26 Advantages: Jitter & Wander (2) 2. Better Jitter Performance than ITU-T recommendation Max Tolerable Jitter Jitter Transfer Function ITU-T Recommended level Comtec TDMGW ITU-T Recommended Level Comtec TDMGW -26-

27 Advantages: Jitter & Wander (3) 2. Better Wander Performance than ITU-T recommendation ITU-T Recommended Comtec TDMGW -27-

28 Advantages: Clock accuracy Clock Accuracy by TCXO Stratum Level 3 => Fully Compliant with various standards clock requirements Standard ITU G.813 Option1 ITU G.813 Option2 GR-235-Core SMC GR-253-Core Stratum3 Clock requirements Long Term Accuracy (20years) Short Term Stability (24Hours) Frequency Drift Rate Long Term Accuracy (20years) Short Term Stability (24Hours) Frequency Drift Rate Long Term Accuracy (20years) Short Term Stability (24Hours) Frequency Drift Rate Long Term Accuracy (20years) Short Term Stability (24Hours) Frequency Drift Rate 4.6 ppm 4.53 ppm N/A 20 ppm 4.6 ppm 5.8x10e ppm 4.6 ppm 5.8x10e ppm 0.37 ppm 4.63x10e

29 Advantages: Flexible Synchronization (1) 1. Various Clock driving & recovery (timing) modes Master Mode Internal Slave Mode Loopback Line Rx** External Differential** Clock Reference from TDM stream (TDM) External clock input Timing packets (IP or ATM) at both ends Adaptive Average Adaptive Enhanced** Timing packets (IP or ATM) at one end ** Comtec Proprietary Clock modes to better support Carrier s or ISP s network infrastructure. -29-

30 Advantages: Flexible Synchronization (2) 2. Clock Failover - Primary & Secondary Clock Setting per port - Automatic change into Secondary Clock after Clock link-off Unframed mode Framed mode -30-

31 PDV (Packet Delay Variation) compensation (1) 1. Re-sequencing - Frames are given Sequence Number at the source TDM. - Frames are received with various latencies at the Destination TDM. - Received frames are re-ordered by sequence number to compensate PDV (Packet Delay Variation) through network. packet packet Packet Network TDM Packet Delay TDM-to-TDM Delay (network latency +Jitter buffer) TDM -31-

32 PDV (Packet Delay Variation) compensation (2) 2. Dynamic Jitter Buffer Operation - The incoming frames are queued in Jitter buffer. - Late-coming frames are given shorter buffer, early-coming Frames longer buffer, to compensate PDV (Packet delay variation). - Frames can be played out with fixed jitter buffer time. The incoming frames are queued with relevant Jitter buffer time. Jitter Buffer us us : : us us 00 ** Max Buffer : 128ms (TDMGW11/4) 512ms (TDMGW8) ** Holdover Clock : ± 0.28~0.37ppm (Stratum 3) -32-