Management of Converging Networks

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1 Greater Chicago Chapter Thursday, of Converging Networks Paul T. Schauer, PE Lucent Technologies

2 Agenda Converging Networks Why Network? What Is Network? Network for CATV 2

3 Converging Networks Switched Telecom Domain Data Networking Domain ASPs MSOs Video Domain 3

4 Converging Networks LAN / WAN Telephony - Primary and Secondary Video - Analog and Digital High Speed Online IP Telephony 4

5 Why Network? New Service Demands on HFC Networks : Transmission quality Effective bandwidth Service reliability (the probability that a system will survive without interruption for a defined period) Outage Rate (the average rate at which service interruptions occur) Availability (the percentage of time that service is available) 5

6 Why Network? Different industries use different measures of service integrity: Telephone Industry CATV Industry! Availability objective 99.99% (53 min / yr).! Applies to network between local switch and network interface.! Excludes local switch, customer premise equipment, in-home wiring and loss of primary and backup power.! Clock starts when outage reported, not when it begins.! Availability objective 99.7% (26.3 hr / yr).! 2 outages within 3 months for single customer.! CableLabs goal based on outages exceeding these rates becoming a major factor in customers perception of service quality.! Outage is 2 or more customers losing 1 or more channels. Loss is interruption not degradation.! Includes power outages! 6

7 Why Network? Customer Expectations are continually increasing C/N (db) Perceptible/Annoying Pe rc e p tib le /S lig h tly Annoying Perceptible/Not Annoying Im p e rc e p tib le 0 TASO 1958 C BS, NASA 1983 CableLabs

8 Why Network? Causes of CATV Service Interruptions Signal Quality Interfering Signals Commercial Power Problems Network Capacity Equipment Failures Customer Misuse 8

9 Why Network? Causes of Service Interruptions Equipment Failures* Power Supplies 3% Amplifiers.15% to 10% Optical Transmitters 2.3% Optical Receivers.7% to 1.7% Passive Devices.07% to 1% Coaxial Connectors.01% to.25% Fiber Optic Cable.3% to 3% Coaxial Cable.23% to 3% HE O E Modem Set-top NID Customer Premises 7% Network Interfaces 5.4% Headend Equipment 5% to 30% * Regional differences such as lightning strikes and underground construction laws have major effect on outages. Sources: Network Reliability Council, Werner & Gatseos, Merk and Strode, Hamilton-Piercy and Balsdon, Bellcore. 9

10 Why Network? Weapons against Service Interruptions... Equipment Failures Start with high quality, reliable equipment. Network Architecture minimizing number of HP affected by single point of failure. Redundant hardware / spares. Fiber Optic transport self healing rings. Network! Monitoring equipment to isolate failure, decreasing repair time. 10

11 What Is Network? TMN HMS FCAPS SNMP 11

12 What Is Network? TMN - Telecommunications Network (ITU Recommendation M.3010) Business Mgmt Managed Applications Service Network Managed Services Element Managed Networks Network Elements 12

13 What Is Network? FCAPS - 5 major functional areas defined by ISO, worldwide standard. F Fault C Configuration A Accounting P Performance S Security 13

14 What Is Network? FCAPS Model Fault Configuration Accounting Performance Security Alarm Surveillance Fault Correlation Trouble Admin Testing Planning Engineering Installation Provisioning Control Usage Measure Pricing / Tariffs Customer Accounts Monitoring Analysis Reporting Quality Assurance Prevention Detection Containment Recovery 14

15 What Is Network? SNMP - Simple Network Protocol ITU RFC 1155 / 1157 / 1448 SNMP Model of a managed network consists of four components: Station - manager controls number of nodes on a network, each equipped with a management agent. Agent - communications intelligence. Information Base (MIB) - collection of information or objects about the node where agent resides. Messages from manager to agent results in reading or configuring an object in the MIB. Network management protocol - manager and agent communicate through a network management protocol, enabling the manager to access objects in the agent s MIBs. In TCP/IP networks, SNMP is an application level protocol using UDP as its underlying transport.) 15

16 What Is Network? SNMP - Three basic sets of messages GET Retrieves the value of an object from an agent MIB (sent by manager). SET Configures the value of an object in an agent MIB (sent by manager). TRAP Enables the agent to alert a manger of an event (sent by agent). The data message containing the SNMP operation is called the Protocol Data Unit (PDU). 16

17 What Is Network? HMS - Hybrid Subcommittee SCTE Standards Department subcommittee (1 of 7). Official standards body for ANSI in North America. Developing Network Interface standards for the CATV industry in North America. Chairman is Esteban Sandino (AT&T Broadband). All work is SNMP based. PHY layer - MAC layer - MIBs - Traps - Alarm handling. Participants are vendors and CATV operators. 17

18 Network For CATV IVR System (Voice) Registration Server (Web) CSR Order Entry Network Inventory System DB Trouble Reporting Billing Inquiries (Web Based) Churn CDR Collection Customer Records Database Billing Platform Circuit Config Order Circuit FM IDCM TN Admin DB Future Development Dispatch/ Work Force Mgmt Electronic Gateways Policy Server Trouble DHCP/ DNS Server Inter-Domain Fault Cable Config Manager DB Cable Fault Manager Optical Config Mgmt Optical Fault Mgmt OneLink 7R/E Circuit Switches ATM EMS ATM Switches Call Agent EMS Call Agents CMTS / NIU EMS Cable Network Elements Optical EMS Optical Network Elements 18

19 Network For CATV IVR System (Voice) Billing Inquiries (Web Based) Churn CDR Collection Registration Server (Web) Customer Records Database Billing Platform Circuit Config Order Entry Order Circuit FM CSR IDCM TN Admin DB Future Development Network Inventory System Dispatch/ Work Force Mgmt Electronic Gateways Policy Server DB Trouble Reporting Trouble DHCP/ DNS Server Inter-Domain Fault Cable Config Manager DB Focus on - Fault Performance Mgmt Cable Fault Manager Optical Config Mgmt Optical Fault Mgmt OneLink 7R/E Circuit Switches ATM EMS ATM Switches Call Agent EMS Call Agents CMTS / NIU EMS Cable Network Elements Optical EMS Optical Network Elements 19

20 Network For CATV Headend Cable Fault System EM EM EM EM EM EM EM EM Video Channel Equipment and Ad Insertion Telephony Switch / Trunks High Speed Data Routers, Servers, and CMTS Telephony over Internet (Pathstar / 7RE) Optical Transport Distribution Hub(s) Fiber Transport & Distribution High Speed Data CMTS Channel Insertion Telephony Termination HFC Plant and End-user Terminals PS O E 26 Modem VoIP Set-top NID O E 32 O E W W Facility, Powering, and Environment 20

21 Network For CATV Business Inter-Domain Separates Services from Networks Service Network : Inter - Domain Network : Domain Specific Inter - Domain : High-speed Data Switched Access Video Entertainment Transport Control Systems Standard Interface (SNMP) Element Standard Interface (HMS) Network Elements Multi-Vendor Support Support New Network Elements 21

22 Network For CATV Difficulties for CATV companies to initiate Inter-Domain New technologies and platforms. High capital cost for equipment and hardened facility. Technical staff with unique skill sets, difficult to find, and expensive to hire. 22

23 Network For CATV Network Manager Layer: Fault Manager Performance Manager Broadband NOC Fault Manager Trouble Ticketing System Performance Manager Database Terminal Servers Client Stations Element Managers (n) Leased Data Circuits Element Manager Layer Element Manager (1) Elements (n) Element Manager (2) Element Layer Element 1 Element 1 Element 1 Local Networks Element 2 Element 2 Element 2 23

24 Network For CATV Let s bring this all together - Deploy Fault and Performance (initially). Interface existing Element Managers and new IDFM. Consider deployment costs Remote Network Services? 24

25 Thank You!

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