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Jian Zhang

InterDomain-QOSM: The NSIS QoS Model for Inter-domain Signaling to Enable End-to-End QoS Provisioning Over Heterogeneous Network Domains. Jian Zhang. Outline. The Problems of the Current Solution in NSIS for End-to-End QoS Provisioning Over Heterogeneous Network Domains

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Jian Zhang

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  1. InterDomain-QOSM: The NSIS QoS Model for Inter-domain Signaling to Enable End-to-End QoS Provisioning Over HeterogeneousNetwork Domains Jian Zhang

  2. Outline • The Problems of the Current Solution in NSIS for End-to-End QoS Provisioning Over Heterogeneous Network Domains • The Overview of the NSIS InterDomain-QOSM • The Operation Model of the InterDomain-QOSM • Basic Features of InterDomain-QOSM • Additional QSPEC Parameters for the InterDomain-QOSM • Illustrations of Inter-domain Signalling Interactions with the InterDomain-QOSM • Open Issues • Conclusions

  3. The Problems of the Current Solution in NSIS for End-to-End QoS Provisioning Over Heterogeneous Network Domains Problem1: The End-to-End QoS Provisioning Cannot Be Realized Unless Ingress QNE Can Support ANY Type of Local NSIS QOSM Problem2: The End-to-End QoS Provisioning Cannot Be Realized Unless ALL Domains are NSIS-capable

  4. Problem1: The End-to-End QoS Provisioning Cannot Be Realized Unless Ingress QNE Can Support ANY Type of Local NSIS QOSM NSIS QOSM1 in the source domain could be ANY type of local NSIS QOSM, e.g. current and/or future QOSMs for xDSL, Ethernet, WiFi, UMTS, etc, access networks. Thus, the Ingress QNEs must be able to support all of them so that the mapping from the local NSIS QOSM of the source domain to the local NSIS QOSM of the transit or sink domains can be done correctly. This is very hard to satisfy.

  5. Problem2: The End-to-End QoS Provisioning Cannot Be Realized Unless ALL Domains are NSIS-capable Obviously, the end-to-end QoS provisioning via the current NSIS signaling approach can not be achieved if there exists any non-NSIS domain along the path from the sender to the receiver. This is also very hard to satisfy in the complex, heterogeneous IP network environment like Internet.

  6. The Overview of the NSIS InterDomain-QOSM The Distinct Separation Between the Intra-domain Control Plane and the Inter-domain Control Plane Basic Features of InterDomain-QOSM The Operation Model of the InterDomain-QOSM

  7. The Distinct Separation Between the Intra-domain Control Plane and the Inter-domain Control Plane The high-level view of the inter-domain interactions between two adjacent domains where the distinct separation between the intra-domain and inter-domain control planes is made and a common inter-domain control interface exists.

  8. Basic Features of InterDomain-QOSM (1) • The InterDomain-QOSM assumes the concept of the distinct separation between the intra-domain control plane and the inter-domain control plane at each administrative domain. • The inter-domain control agent is a domain-wide centralized QNE which is well-known at its administrative domain and supports the InterDomain-QOSM so that the inter-domain interactions between adjacent domains can be realized in a standardized way. • The SLS parameters and QoS control information required for the inter-domain QoS interactions are specified by using/extending the QSPEC template.

  9. Basic Features of InterDomain-QOSM (2) • The InterDomain-QOSM resides on top of the QoS-NSLP and NTLP, which means that it uses the messages, objects and procedures defined by the QoS-NSLP for signaling exchanges with other QNEs and depends on the NTLP to discover the peer inter-domain control agents at the adjacent domains. • The InterDomain-QOSM makes no assumptions about the implementation mechanisms of intra-domain control agent. That is to say that the intra-domain control agent might be centralized or distributed, NSIS based or non-NSIS based. • The InterDomain-QOSM makes no assumption about the method that the underlying NTLP might use to discover the peer inter-domain control agents at adjacent domains.

  10. Basic Features of InterDomain-QOSM (3) • The egress QNE (for a NSIS domain) need to send its IP interface to which the signaled stream is assigned to the inter-domain control agent so that the RESPONSE message can be sent back to the egress QNE. • The egress QNE (for a NSIS domain) or the intra-domain control agent (for a non-NSIS domain) need to discover the IP interface of the ingress node from which the signaled stream will be admitted into its adjacent downstream domain and send this interface to the inter-domain control agent at its domain although the InterDomain-QOSM makes no assumptions about the discovery method.

  11. The Operation Model of the InterDomain-QOSM (1)

  12. The Operation Model of the InterDomain-QOSM (2) • By utilizing the operation model of the InterDomain-QOSM to enable end-to-end QoS provisioning over multiple, heterogeneous network domains, the edge QNEs in NSIS domains need to support only its local NSIS QOSM and the InterDomain-QOSM. • By utilizing the InterDomain-QOSM for the inter-domain signaling, the inter-domain signaling interactions can be realized in a standardized way no matter how the intra-domain control plane is implemented (centralized or distributed, NSIS based or non-NSIS based).

  13. Additional QSPEC Parameters for the InterDomain-QOSM Egress ID Parameter Ingress ID Parameter Absolute Time Specification Parameter Relative Time Specification Parameter

  14. Egress ID Parameter <Egress ID> parameter is added to the QSPEC Control Information of the InterDomain-QOSM, which describes the IP interfaces of the egress node to which the signaled traffic stream is assigned.

  15. Ingress ID Parameter <Ingress ID> parameter is added to the QSPEC Control Information of the InterDomain-QOSM, which describes the IP interfaces of the ingress node to which the signaled traffic stream is assigned.

  16. Absolute Time Specification Parameter <Absolute Time Specification> defines a time period over which a SLS will be available or requested by specifying its starting and ending time points.

  17. Relative Time Specification Parameter <Absolute Time Specification> defines a time period over which a SLS will be available or requested by specifying only the length of the time period.

  18. Illustrations of Inter-domain Signalling Interactions with the InterDomain-QOSM Y.1541-QOSM (source domain)--- RMD-QOSM(transit domain) ---- Y.1541-QOSM (sink domain) Non-NSIS (source domain) --- RMD-QOSM (transit domain) --- Y.1541-QOSM (sink domain) Non-NSIS (source domain) --- Non-NSIS (transit domain) --- Non-NSIS (sink domain)

  19. Y.1541-QOSM (source domain)--- RMD-QOSM(transit domain) ---- Y.1541-QOSM (sink domain)

  20. Non-NSIS (source domain) --- RMD-QOSM (transit domain) --- Y.1541-QOSM (sink domain)

  21. Non-NSIS (source domain) --- Non-NSIS (transit domain) --- Non-NSIS (sink domain)

  22. Open Issues • For the case that the non-NSIS domain exists, we currently assume that a domain-wide centralized intra-domain control agent resides together with the inter-domain control agent and they interact with each other via a set of standardized APIs (the definitions of the APIs also need further discussions). • The discovery of the IP interface of the ingress node from which the signaled stream will be admitted into its adjacent downstream domain could be moved to the inter-domain control agent. • More QSPEC parameters may be needed for the InterDomain-QOSM. • The support of the automatic inter-domain adjustment in the scenario of mobile end customers.

  23. Conclusions (1) • The InterDomain-QOSM assumes the concept of distinct separation between the intra-domain and inter-domain control agents at each administrative domain. • The InterDomain-QOSM allows the QoS negotiation and setup of inter-domain traffic streams in a standardized and dynamic way, hiding the heterogeneity of intra-domain control mechanisms in use in a chain of heterogeneous network domains.

  24. Conclusions (2) • By utilizing the operation model of the InterDomain-QOSM, the edge QNEs in NSIS domains need to support only its local NSIS QOSM and the InterDomain-QOSM for the end-to-end QoS provisioning over multiple, heterogeneous network domains. • By utilizing the InterDomain-QOSM for the inter-domain signaling, the inter-domain signaling interactions can be realized in a standardized way no matter how the intra-domain control plane is implemented (centralized or distributed, NSIS based or non-NSIS based).

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