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Quality of Service in IP Networks

Quality of Service in IP Networks. Scott Nelson. Triple Play NGN Architecture. Distributed BNG (as shown) Subscriber management in BSA (7450) L2 forwarding with L3 QoS/security Full routing in the BSR (7750) Network architecture for lowest capex

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Quality of Service in IP Networks

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  1. Quality of Service in IP Networks Scott Nelson

  2. Triple Play NGN Architecture

  3. Distributed BNG (as shown) Subscriber management in BSA (7450) L2 forwarding with L3 QoS/security Full routing in the BSR (7750) Network architecture for lowest capex Collapses residential, business L2, and business L3 service aggregation on common elements No extra hops or boxes and supports local VOD PIM multicast trees reduced BNG Routed termination Subscriber management and routing in BSR Access nodes terminate into BSRs directly, or via Ethernet Aggr/Packet-Ring (1850TSS) backhaul Layer 3 Business services supported everywhere BSR (7750) also supports L2-VPNs for business Broadband Network Gateway (BNG) as per DSL Forum WT-101 Triple Play Service Delivery Architecture Broadband Service Aggregation Broadband Service Router PublicInternet Subscriber Broadband Access Node BTV ADSL2+ VDSL2 GPON IP Backbone . . . Home Gateway IASP Partners

  4. Address Scale and Reduce Cost Scalable subscriber management and QoS Improve Resiliency Non-Stop Services, subscriber-state resiliency, etc. Fully address subscriber, network, and application security Secured Ethernet, lawful interception, etc Provide an operational model for mass deployment Auto-configuration, simple OSS integration Improve Subscriber policy control H-QoS, L4-L7 policy control, etc Optimize for Applications Multicast handling, service admission control, etc Ability to consolidate business services on a common infrastructure L2-VPNs, L3-VPNs, Broadband services, Virtual Ethernet services, peering, etc PublicInternet Subscriber Broadband Access Node BTV ADSL2+ VDSL2 GPON IP Backbone . . . Home Gateway IASP Partners Triple Play Service Delivery Architecture Broadband Service Aggregation Broadband Service Router

  5. 150,000 120,000 90,000 kbps Mbps 60,000 30,000 0 0 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 IP Based Triple Play • Triple Play of VoIP, IP Video and Internet • Network Bandwidth dominated by IP Video • Access, Metro and Core Based on modelling for NA Operator Internet Bandwidth VoIP ICC Bandwidth PiP Bandwidth Internet VoD Bandwidth Internet traffic - Internet Core IP Video Multicast Bandwidth IP Traffic in the IP “Core” (behind BSR - 7750) Assumes centralised VoD and D-server

  6. 200G ~50k users 10G ~300 users 100G ~8k users 16M 9M 2M 1M IP Video BW Triple Play Bandwidth Needs per user .2M .2M .2M .2M VoIP BW 3M* .3M .3M .3M HSI BW 20M 10M 3M 1.5M Total BW ~15x 100x 30x 30x Scale Increase IP Video and Network Transformation { Today’s Bandwidth Needs per user Home Access Aggregation Service Router Core

  7. IP Quality of Service • What do we mean by IP Quality of Service? • Quality - Meeting the customers expectation • Manage services at the IP layer • Individual IP flows • Multiservice IP networks • Network Design plays a key role • Network Dimensioning • Coping with bursty nature of IP flows • IP classifcation and differentiation of different service types • Video, VoIP, High Speed Internet • Service and Network Availability • Network resiliency • High Service Availability in the Network Equipment HSI - High Speed Internet • This QoS Enabled IP Network is not the Internet

  8. 7450 ESS or 7750 SR GE VoIP 10GE Per Sub VLAN Video 7750SR VoIP HSI VoIP VOD Per Sub VLAN Video IP HSI Video Burst VoIP VoIP Preferred Data Video HSI HSI Multi Sub VLAN Best Effort Data VoIP VoIP Video HSI HSI VoIP VoIP Video HSI HSI End-to-End QoS Model Per-sub-per-service (advanced) QoS at Subscriber Mngmt Edge Prioritization: L2-L4, DSCP Queueing/Shaping: Hierarchical QoS Per-sub, per-service queuing, scheduling & shaping Marking: 802.1p downstream DSCP upstream Per-sub-per-service (basic) QoS at DSLAM Prioritization: 802.1p Queueing: 4 queues per sub & ingress policing CoS queuing to net. Multicast injection Marking: 802.1p marking Class-based QoS at Eth-Aggr/Packet-Ring with fair BW partitioning/re-use Prioritization: 802.1p Queueing/Shaping: MEF policing (EVC+CoS) CoS scheduling & shaping Fair ring-wide load balancing Class-based QoS at Core with fair BW partitioning /reuse Prioritization: L2-L4, DSCP Queueing/Shaping: Application/content queues with shaping Marking/re-marking: DSCP downstream DSCP upstream

  9. Leveraging the QoS Evolution for Improved High Speed Internet Services • Classification utilizes the QoS Infrastructure • Increasing classification intelligence through application awareness • Utilizing an integrated network level QoS Solution • Triple Play is Driving a QoS-based InfrastructureWe can leverage this Infrastructure for HSI Service Value

  10. Beyond Triple Play – Adding Value to Internet • For the Service Provider • Tiered HSI Revenue Opportunities to increase ARPU • Gaming, Peer-to-peer, URL filtering, iVoIP, iVideo • Fairness: Align usage of HSI network resources with revenue on a per subscriber basis • Enable an IASP “eco-system” to enable competing IASPs to differentiate themselves • For the C/ASP • Differentiate your offering by improving your customers’ HSI experience • For the Subscriber • Gain a better HSI experience • Pay only for the value that you need

  11. Neutrality, Fairness and Service Improvement • Net Neutrality (FCC August 2005 Principles) • Access the internet content of choice • Run applications and use services of choice • Connect their choice of devices that do no harm • Enjoy competition among service, application and content providers • Fairness • Ensure best-effort network resources are allocated in a just and equitable fashion • Service Improvement • Enables subscribers and content/application providers to improve their experiences over the public internet • Service Expansion Delivers a Better Internet ExperienceEnsures Fairness and Maintains the Principles of Neutrality

  12. Triple Play Networks • QoS Enabled IP Networks • Basis for Triple Play Networks • Underlying IP Infrastructure for IMS • Architecture determined by IP Video needs • Common architectures • Different Implementations • Remaining challenges • Wholesaling models • Beyond ULL • Bit stream access • Net Neutrality • Requires creative and close co-operation between service providers, equipment vendors and regulators

  13. www.alcatel.com

  14. High Availability for Residential & Business Services Spoke SDP to 7750 means Fast reroute to a routed interface instead of slower VRRP failover Single-homed DSLAM with LAG Sub-50ms Fast Reroute • Hot-Standby IP edge router redundancy with IPoE/DHCP • Rapid restoration with VPLS and sub-50ms fast-reroute, no spanning tree • DHCP state persistence in 7450 and 7750 for all lease-related state • Link redundancy options with 802.3ad link aggregation and active/standby options • High-availability with non-stop routing/non-stop service 7750 7450 7450 VPLS 7450 7750 Policy VRRP provides service-aware choice of master gateway router. IPoE and VRRP provide hot standby reslience. Non-stop routing Non-stop service means node stays up Non-stop routing Non-stop service means node stays up Dual-homed customer

  15. Subnet spans many subscribers and multiple OLTs Retains same OLT connectivity model Enables persistent context for each subscriber Subnet can span multiple DSLAMs Subscriber identified by option 82 Subscriber policy and queues dynamically assigned Routed BNG Connectivity Models- Per-Sub VLAN & Multi-Sub VLAN FTTx FTTx BTV BTV Per-sub Multi-sub 73xx 73xx FTTx FTTx Multi-sub Per-sub IP: 1.2.3/24 IP: 1.2.3/24 BTV BTV 7750 7750 73xx 73xx Per-subscriber Q-tagged circuits are sub-interfaces grouped into one common subnet Option for Multi-subscriber VLANs with bridging in DSLAM. VLAN group interface to extend subnet

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