TAILIEUCHUNG - MIDDLEWARE NETWORKS- P8

MIDDLEWARE NETWORKS- P8: The material in this book is presented in three major parts: IP Technology Fundamentals, IP Service Platform Fundamentals, and Building the IP Platform. Part I of IP Technology Fundamentals presents key technologies and issues that lay the foundation for building IP service platforms. | 326 Middleware Networks Concept Design and Deployment Figure 9-16 Multiple Layers Integrates Standards-Based Transports to the client using existing switch technologies. Content flows subsequently with suitable usage records collected through standard open APIs. Consider the following detailed steps 1. Bilateral Authentication by Service and Client see Figure 9-17 . Service nodes authenticate to network . Service nodes start and announce video selection and content streaming services . Client node authenticates to network Figure 9-17 One-Time Secure Authentication Allows Client to Request Content TEAM LinG - Live Informative Non-cost and Genuine Programmable Interfaces for Networks PIN 327 2. Client node visits URL and requests content 3. Service Delivery through Managed Transport see Figure 9-18 . Service node receives request and submits usage record . Network elements negotiate connection to the client The negotiated connection provides the appropriate Quality of Service QoS in keeping with the level service agreements between client network and service In this example this defines an ATM connection at a bandwidth that corresponds to the detail level requested by the client . Content streams to client 4. Stream completes or connection-termination event is generated by an end point or an administrative component 5. QoS connection terminates 6. Service node submits total usage records These capabilities are harnessed for example to securely establish a client identity and then provide an ATM session that streams video to the client. Figure 9-18 Client IP-Based Request with Delivery over High-speed Transport Distributed Network Element - DNE To address such issues we devised an edge gateway architecture that is based on a Distributed Network Element DNE . The defining feature of a DNE is the flow separation. Flow separation allows the small-volume control flows to be routed through the gate and the proxies and the large-volume data flows to

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