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Pricing, Charging, & Billing Experiments Using the H.323 Gateway Jimmy Shih, Anthony Joseph, Randy Katz The ICEBERG Testbed Indoor/Outdoor Coverage Paging Base Indoor Coverage Station Controller 1900 MHz GSM Proxy Proxy Cellular Base Station Data Converter Local Area Network 1800 MHz GSM Proxy Cellular Base Station H.323 Gateway Outdoor Coverage Public Switched Telephone Network The H.323 Testbed Provide a web interface. Integrate with the IMAP email service. Web server (H.323 proxy using the upgraded Lucent Elemedia H.323 protocol stack). Relational database. Upgraded Motorola Vanguard H.323 gateway. Primary Rate ISDN line (24 simultaneous voice calls), 100 Mbits Ethernet. Web Server Motorola Public (H.323 Vanguard Local Area Switched Proxy) H.323 Network Telephone Relational Gateway Network Database 100 Mbits Ethernet Primary Rate ISDN Line Experiment 1: Congestion Pricing Design Features: Provide real-time pricing & billing information. Allow callers and callees to split the call costs. Provide all the control functions through both the phones and the computers. Experiment 1: Congestion Pricing 500 users using the gateway to make and receive telephone calls. Capacity limited to 24 simultaneous voice connections. First come first service with fat rate per minute leads to high utilization, but poor availability. Congestion pricing with price per minute depending on the network load can lead to high utilization and good availability. Price per minute can depend on the call duration. Price per minute can depend on the amount of usage in a time period. Experiment 2: Multiple Service Providers Logically: one service provider responsible for calls in each area code. Physically: emulate multiple service providers in our H.323 gateway. Logical Picture Physical Picture 415 Area Code 510 Area Code Service PSTN Service Provider H.323 Gateway Provider 415 ACSP 415 Area Code Internet 650 ACSP 650 Area Code 650 Area Code Service 510 ACSP Provider 510 Area Code Experiment 2: Multiple Service Providers Provide one integrated bill across multiple service providers. Perform settlements between service providers. Using a Clearing House to find the best path across multiple service providers. Allow the best path to change depending on the network conditions. See if prices can solve congestion across multiple service providers. See if prices can perform load balancing across the network. Provide mechanisms to deal with network stability issues. Experiment 3: Multicast Services Provide multiple party calls. Handles membership changes. Handles different link prices in the multicast tree. Allow members to negotiate how to split the cost. Experiment 4: Reliable Datagram Services Provide voice message delivery service. Sending reliable datagram across multiple service providers. Allow senders & receivers to negotiate on who should pay.
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