Quality Of Service In Ip Networks


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Quality Of Service In Ip Networks

  1. 1. Quality of Service in IP Networks <ul><li>Scott Nelson </li></ul>
  2. 3. Triple Play Service Delivery Architecture <ul><li>Distributed BNG (as shown) </li></ul><ul><ul><li>Subscriber management in BSA (7450) </li></ul></ul><ul><ul><li>L2 forwarding with L3 QoS/security </li></ul></ul><ul><ul><li>Full routing in the BSR (7750) </li></ul></ul><ul><ul><li>Network architecture for lowest capex </li></ul></ul><ul><ul><li>Collapses residential, business L2, and business L3 service aggregation on common elements </li></ul></ul><ul><ul><li>No extra hops or boxes and supports local VOD </li></ul></ul><ul><ul><li>PIM multicast trees reduced </li></ul></ul><ul><li>BNG Routed termination </li></ul><ul><ul><li>Subscriber management and routing in BSR </li></ul></ul><ul><ul><li>Access nodes terminate into BSRs directly, or via Ethernet Aggr/Packet-Ring (1850TSS) backhaul </li></ul></ul><ul><ul><li>Layer 3 Business services supported everywhere </li></ul></ul><ul><ul><li>BSR (7750) also supports L2-VPNs for business </li></ul></ul>Home Gateway BTV . . . Broadband Access Node Broadband Service Router Broadband Service Aggregation IASP Partners IP Backbone Subscriber Public Internet ADSL2+ VDSL2 GPON Broadband Network Gateway (BNG) as per DSL Forum WT-101
  3. 4. Triple Play Service Delivery Architecture <ul><li>Address Scale and Reduce Cost </li></ul><ul><ul><li>Scalable subscriber management and QoS </li></ul></ul><ul><li>Improve Resiliency </li></ul><ul><ul><li>Non-Stop Services, subscriber-state resiliency, etc. </li></ul></ul><ul><li>Fully address subscriber, network, and application security </li></ul><ul><ul><li>Secured Ethernet, lawful interception, etc </li></ul></ul><ul><li>Provide an operational model for mass deployment </li></ul><ul><ul><li>Auto-configuration, simple OSS integration </li></ul></ul><ul><li>Improve Subscriber policy control </li></ul><ul><ul><li>H-QoS, L4-L7 policy control, etc </li></ul></ul><ul><li>Optimize for Applications </li></ul><ul><ul><li>Multicast handling, service admission control, etc </li></ul></ul><ul><li>Ability to consolidate business services on a common infrastructure </li></ul><ul><ul><li>L2-VPNs, L3-VPNs, Broadband services, Virtual Ethernet services, peering, etc </li></ul></ul>Broadband Service Router Broadband Service Aggregation Home Gateway BTV . . . Broadband Access Node IASP Partners IP Backbone Subscriber Public Internet ADSL2+ VDSL2 GPON
  4. 5. IP Based Triple Play <ul><li>Triple Play of VoIP, IP Video and Internet </li></ul><ul><ul><li>Network Bandwidth dominated by IP Video </li></ul></ul><ul><ul><li>Access, Metro and Core </li></ul></ul>Internet Bandwidth ICC Bandwidth PiP Bandwidth VoD Bandwidth Multicast Bandwidth IP Video Internet VoIP Based on modelling for NA Operator Internet traffic - Internet Core IP Traffic in the IP “Core” (behind BSR - 7750) Assumes centralised VoD and D-server kbps 0 30,000 60,000 90,000 120,000 150,000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Mbps 0
  5. 7. IP Quality of Service <ul><li>What do we mean by IP Quality of Service? </li></ul><ul><ul><li>Quality - Meeting the customers expectation </li></ul></ul><ul><ul><li>Manage services at the IP layer </li></ul></ul><ul><ul><ul><li>Individual IP flows </li></ul></ul></ul><ul><ul><ul><li>Multiservice IP networks </li></ul></ul></ul><ul><li>Network Design plays a key role </li></ul><ul><ul><li>Network Dimensioning </li></ul></ul><ul><ul><ul><li>Coping with bursty nature of IP flows </li></ul></ul></ul><ul><ul><ul><li>IP classifcation and differentiation of different service types </li></ul></ul></ul><ul><ul><ul><ul><li>Video, VoIP, High Speed Internet </li></ul></ul></ul></ul><ul><ul><li>Service and Network Availability </li></ul></ul><ul><ul><ul><li>Network resiliency </li></ul></ul></ul><ul><ul><ul><li>High Service Availability in the Network Equipment </li></ul></ul></ul><ul><li>This QoS Enabled IP Network is not the Internet </li></ul>HSI - High Speed Internet
  6. 9. Leveraging the QoS Evolution for Improved High Speed Internet Services <ul><li>Triple Play is Driving a QoS-based Infrastructure We can leverage this Infrastructure for HSI Service Value </li></ul><ul><ul><li>Classification utilizes the QoS Infrastructure </li></ul></ul><ul><ul><li>Increasing classification intelligence through application awareness </li></ul></ul><ul><ul><li>Utilizing an integrated network level QoS Solution </li></ul></ul>
  7. 10. Beyond Triple Play – Adding Value to Internet <ul><li>For the Service Provider </li></ul><ul><ul><li>Tiered HSI Revenue Opportunities to increase ARPU </li></ul></ul><ul><ul><ul><li>Gaming, Peer-to-peer, URL filtering, iVoIP, iVideo </li></ul></ul></ul><ul><ul><li>Fairness: Align usage of HSI network resources with revenue on a per subscriber basis </li></ul></ul><ul><ul><li>Enable an IASP “eco-system” to enable competing IASPs to differentiate themselves </li></ul></ul><ul><li>For the C/ASP </li></ul><ul><ul><li>Differentiate your offering by improving your customers’ HSI experience </li></ul></ul><ul><li>For the Subscriber </li></ul><ul><ul><li>Gain a better HSI experience </li></ul></ul><ul><ul><li>Pay only for the value that you need </li></ul></ul>
  8. 11. Neutrality, Fairness and Service Improvement <ul><li>Net Neutrality (FCC August 2005 Principles) </li></ul><ul><ul><li>Access the internet content of choice </li></ul></ul><ul><ul><li>Run applications and use services of choice </li></ul></ul><ul><ul><li>Connect their choice of devices that do no harm </li></ul></ul><ul><ul><li>Enjoy competition among service, application and content providers </li></ul></ul><ul><li>Fairness </li></ul><ul><ul><li>Ensure best-effort network resources are allocated in a just and equitable fashion </li></ul></ul><ul><li>Service Improvement </li></ul><ul><ul><li>Enables subscribers and content/application providers to improve their experiences over the public internet </li></ul></ul><ul><li>Service Expansion Delivers a Better Internet Experience Ensures Fairness and Maintains the Principles of Neutrality </li></ul>
  9. 12. Triple Play Networks <ul><li>QoS Enabled IP Networks </li></ul><ul><ul><li>Basis for Triple Play Networks </li></ul></ul><ul><ul><li>Underlying IP Infrastructure for IMS </li></ul></ul><ul><ul><li>Architecture determined by IP Video needs </li></ul></ul><ul><ul><ul><li>Common architectures </li></ul></ul></ul><ul><ul><ul><li>Different Implementations </li></ul></ul></ul><ul><li>Remaining challenges </li></ul><ul><ul><li>Wholesaling models </li></ul></ul><ul><ul><ul><li>Beyond ULL </li></ul></ul></ul><ul><ul><ul><li>Bit stream access </li></ul></ul></ul><ul><ul><li>Net Neutrality </li></ul></ul><ul><ul><li>Requires creative and close co-operation between service providers, equipment vendors and regulators </li></ul></ul>
  10. 13. www.alcatel.com
  11. 14. High Availability for Residential & Business Services <ul><li>Hot-Standby IP edge router redundancy with IPoE/DHCP </li></ul><ul><li>Rapid restoration with VPLS and sub-50ms fast-reroute, no spanning tree </li></ul><ul><ul><li>DHCP state persistence in 7450 and 7750 for all lease-related state </li></ul></ul><ul><li>Link redundancy options with 802.3ad link aggregation and active/standby options </li></ul><ul><li>High-availability with non-stop routing/non-stop service </li></ul>VPLS 7450 Sub-50ms Fast Reroute 7750 Non-stop routing Non-stop service means node stays up 7450 7450 Dual-homed customer Single-homed DSLAM with LAG Spoke SDP to 7750 means Fast reroute to a routed interface instead of slower VRRP failover Non-stop routing Non-stop service means node stays up Policy VRRP provides service-aware choice of master gateway router. IPoE and VRRP provide hot standby reslience. 7750
  12. 15. Routed BNG Connectivity Models - Per-Sub VLAN & Multi-Sub VLAN <ul><li>Subnet spans many subscribers and multiple OLTs </li></ul><ul><li>Retains same OLT connectivity model </li></ul><ul><li>Enables persistent context for each subscriber </li></ul><ul><li>Subnet can span multiple DSLAMs </li></ul><ul><li>Subscriber identified by option 82 </li></ul><ul><ul><li>Subscriber policy and queues dynamically assigned </li></ul></ul>FTTx 7750 73xx BTV FTTx 73xx BTV Per-sub Per-sub Per-subscriber Q-tagged circuits are sub-interfaces grouped into one common subnet IP: 1.2.3/24 FTTx 7750 73xx BTV FTTx 73xx BTV Multi-sub Multi-sub Option for Multi-subscriber VLANs with bridging in DSLAM. VLAN group interface to extend subnet IP: 1.2.3/24