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Resource Control in Ethernet-based Aggregation Network

Resource Control in Ethernet-based Aggregation Network. István Moldován, Ivett Kulik Budapest University of Technology and Economics, Dávid Jocha Traffic Lab, Ericsson Research, Ericsson Hungary Wei Zhao, Zere Ghebretensaé, Victor Souza

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Resource Control in Ethernet-based Aggregation Network

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  1. Resource Control in Ethernet-based Aggregation Network István Moldován, Ivett Kulik Budapest University of Technology and Economics, Dávid Jocha Traffic Lab, Ericsson Research, Ericsson HungaryWei Zhao, Zere Ghebretensaé, Victor Souza Broadband & Transport, Ericsson Research, Ericsson AB, Stockholm, Sweden 1 | /View/Header and Footer/<title of presentation>, <authors e-mail address> | dd. mmmm yyyy.dddd

  2. Overview of Presentation • Introduction • Resource management in the first mile • Resource management in the aggregation • Provisioning models • Simulations • Nomadic and resident user behavior • Simulation Scenarios • Results • Conclusions 2 | /View/Header and Footer/<title of presentation>, <authors e-mail address> | dd. mmmm yyyy.dddd

  3. Services Triple Play Nomadism form of discrete mobility Combination of QoS enabled services and nomadicity

  4. Bottlenecks in the aggregation • The architecture • Aggregation network of Ethernet bridges • Dual homing with rings in the higher level of the aggregation • Offers redundant connection between access-edge node pairs • the physical layer capacity from the ANs typically exceeds the aggregate uplink capacity • downstream bottleneck can also occur either because the downstream traffic is not uniformly distributed across all the downstream linkssituation may be temporarily caused by nomadic user traffic Aggregation Network Regional/ Service Provider Network Customer Network First Mile 4 | /View/Header and Footer/<title of presentation>, <authors e-mail address> | dd. mmmm yyyy.dddd

  5. Resource Provisioning in the first mile Resource provisioning in the DSL access single PVC: only one PVC for all traffic, QoS based on the P-bits in the VLAN header tag multiple PVC: a PVC for each service, the attributes of the PVC reflect the QoS requirements of the service Resource provisioning in the WLAN access - based on IEEE 802.11e EDCA / Wi-Fi MultiMedia (WMM) Static Provisioning: limits at an AP are defined in advance. Dynamic provisioning: for each service request the TXOP values are updated. Resource provisioning in the WiMAX access Provisioned Authorization Model the parameters are provided, for example, by the network management system. Dynamic Authorization Model, the authorization module issues its decisions based on its vendor specific implementation.

  6. Resource Provisioning in the aggregation Requirements Scalability - control on individual services is not scalable 100 000 users, 10 service providers, each providing 5 services => 5 000 000 connections Aggregation required

  7. Resource management schemes Pre-provisioned Pipes Access Node/service Aggregation pipes represent the AN-VLAN couple Provisioning the pipes = logical assignment of bandwidth RM maintains a database with all pipes and traffic admitted Link-by-Link Admission Control similar to the Pre-provisioned Pipe model resources are maintained on a per-link basis for each pipe Per-AN over-provisioned the traffic matrixis unknown – a simplified HOSE model used simple, and still provides control over the resources

  8. Resource management schemes - 2

  9. Simulation scenario

  10. Traffic Model DSL residential customers use triple play services, i.e. VoIP, Video and Internet access at their home, and they may use them simultaneously, with a given probability for each service. The video service may be either SDTV or HDTV. Nomadic users using WLAN are considered to request one service when connected. For example it may use its mobile device to make phone calls or to watch a show/match. Although the user is subscribed to a number of services, we consider that it is using only one service at a time when nomadic. Even though it is possible that a user accesses multiple services at the same time from his laptop, we model it as two or more different users. Customers using WiMAX access are also residential users with triple-play-like services. The connection provided has a range of 2-, 4-, 6-, 8- or 10Mbps and the bandwidth can be shared. Thus, WiMAX users may use all three services simultaneously, except HDTV and the aggregate bandwidth of the WiMAX base station is 70Mbps.

  11. Traffic model The considered traffic model

  12. Results – Network Throughput

  13. Results – Call setup delay

  14. Conclusions • Resource management is needed not only in the first mile, where bandwidth is scarce, but also in the aggregation • Three bandwidth provisioning schemes have been compared by simulation • per-link admission control case wins • but most complex • pre-provisioned pipe is less efficient, but preferred • simple and easy to manage • per-AN over-provisioning – not bandwidth efficient • but simplest, even local CAC is possible 14 | /View/Header and Footer/<title of presentation>, <authors e-mail address> | dd. mmmm yyyy.dddd

  15. Thank you for your attention! High Speed Networks Laboratory 15 | /View/Header and Footer/<title of presentation>, <authors e-mail address> | dd. mmmm yyyy.dddd

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