Method for providing IP telephony with QoS using end-to-end RSVP signaling
First Claim
1. A system for providing quality of service in an Internet Protocol (IP) telephony session between a calling party station and a called party station, the system comprising:
- a first device coupled to the calling party station, the first device having IP capability;
a first session initiation protocol proxy server;
a second session initiation protocol proxy server coupled to the first session initiation protocol proxy server; and
a second device coupled to the second session initiation protocol proxy server, the second device having IP capability, wherein the proxy servers initiate installation of policy in the devices for the IP telephony session, and the devices support resource reservation for the IP telephony session after the installation.
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Accused Products
Abstract
The present invention discloses a method whereby the separate protocols: session initiation protocol SIP, resource reservation protocol RSVP, common open policy service COPS, and open settlement protocol OSP are used together to setup, maintain, and teardown Internet communications having an acceptable QoS. This process is accomplished by dynamically establishing RSVP policy based on SIP telephony requests to provide IP communications with QoS across the Internet. The QoS policy is installed in network elements at the request of the network elements. The network elements receive a RSVP PATH or RESV request and queries the policy server; the policy server queries a Local database about ID and services for the user and a clearinghouse server (if available) or a policy server in a corresponding network; upon positive acknowledgement from the local database and/or the clearinghouse server, the policy server confirms policy in network elements to accept RSVP PATH and RESV requests for the particular reserved data flow to the SIP client. In this manner, the called telephone will not ring until policy has been provisioned in the network elements and resources have been reserved end-to-end to ensure an acceptable level of QoS.
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Citations
20 Claims
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1. A system for providing quality of service in an Internet Protocol (IP) telephony session between a calling party station and a called party station, the system comprising:
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a first device coupled to the calling party station, the first device having IP capability; a first session initiation protocol proxy server; a second session initiation protocol proxy server coupled to the first session initiation protocol proxy server; and a second device coupled to the second session initiation protocol proxy server, the second device having IP capability, wherein the proxy servers initiate installation of policy in the devices for the IP telephony session, and the devices support resource reservation for the IP telephony session after the installation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing quality of service in an Internet Protocol (IP) telephony session between a calling party and a called party, the method comprising:
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establishing an IP connection between a first device and a second device, wherein the first device communicates with the calling party and the second device communicates with the called party; reserving network resources for the IP telephony session, by generating, at a session initiation protocol client, a first session initiation protocol call setup request with quality of service and transporting the first session initiation protocol call setup request to a first session initiation protocol proxy server; providing quality of service in a remote local area network using a remote bandwidth manager and the second device; informing the first device of the quality of service installation in the remote local area network; and providing quality of service in a client local area network using a client bandwidth manager and the first device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for installing quality of service policy in a network for an internet protocol (IP) telephone call between a calling terminal and a called terminal, comprising:
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receiving a request for resource reservation from the calling terminal by at least one network element in the network; querying a policy server for installing the quality of service policy by the at least one network element; and installing, by a bandwidth manager, the quality of service policy in the at least one network element to accept resource reservation for the call. - View Dependent Claims (17, 18, 19, 20)
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Specification