 Font display and text editing system with character overlay feature |
| OF THE INVENTION Referring now to the drawings wherein like numerals indicate like elements, there ... |
|
| Multi-lobe antenna having a disc-shaped Luneberg lens |
| What is claimed is: 1. An antenna, operable within the micro wave range, comprising a round, disc-... |
|
| Dual switch multimode array antenna |
| I claim: 1. An array antenna connectable to an input/output port forming an aperture to transmit or ... |
|
| Phase detection in an ink jet system printer of the charge amplitude controlling type |
| The present invention relates to an ink jet system printer of the charge amplitude controlling type ... |
|
| Apparatus and method for driving a magnetic print head |
| What is claimed is: 1. An electronic circuit for driving at least first and second sets of ... |
|
| Low volatility formulations of microencapsulated clomazone |
| We claim: 1. A process for the preparation of herbicidally effective formulations of clomazone ... |
|
|
Method for providing IP telephony with QoS using end-to-end RSVP signaling
| Details |
Inventors: Donovan, Steven R.;
Assignee: MCI WorldCom, Inc. (Jackson, MS)
Primary Examiner: Kizou; Hassan
Assistant Examiner: Logsdon; Joe
Attorney, Agent or Firm:
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 acknowledgment 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. |
|
DETAILED DESCRIPTION It is therefore an object of the present invention to provide a method for implementing IP telephony with QoS using end-to-end RSVP signaling that is capable of providing an acceptable QoS during a IP communications across the Internet.
It is another object of the invention to provide a method for dynamically establishing QoS policy for SIP-based voice and video calls on the Internet.
It is an additional object of the invention to provide a method for implementing IP telephony with QoS using end-to-end RSVP signaling that is efficient in its use of network resources and easy to implement.
To achieve these objects, there is provided a method for implementing IP telephony with QoS using end-to-end RSVP signaling that comprises the transfer of a unique sequence of messages prior to, during, and after IP communications.
The sequence is not arbitrary as the parameters communicated in a previous message may be used in the follow-up messages.
While the message exchanges for the protocols listed above are well documented and understood when each is used in isolation, this is not the case when they are used together.
The present invention discloses a method whereby the separate protocols are used together to setup, maintain, and teardown Internet communications having an acceptable level of QoS.
This is accomplished by dynamically establishing RSVP policy based on SIP telephony requests.
The application defines two options for QoS support for IP telephony: PSTN-style "QoS assured" where QoS is guaranteed, and Internet-style "QoS enabled" where only partial or no QoS may be available.
In addition, the application deploys QoS in two ways: 1) "Pull" method, QoS is outsourced to the servers or 2) "Push" method, QoS is provided locally to the routers.
The method of providing quality of service (QoS) in an Internet Protocol (IP) telephony session between a calling party and a called party, comprises the steps of providing transporting IP media for the session between said calling party and a first device having IP capability; providing transporting IP media for the session between the called party and a second device having IP capability; establishing an IP connection between said first device and the second device; and reserving network resources for the telephony session
|
| Related patents |
|
|
Method for reducing time required to receive and decode a temporary equipment identifier message
OF PREFERRED EMBODIMENTS FIG. 6 is a time flow diagram depicting an arrangement of message blocks that facilitates increased battery life through decreased power usage, ...
|
|
|
Gain control for multi-channel fixed wireless terminal
OF THE PREFERRED EMBODIMENTS Referring now to the drawings in which like numerals reference like parts, FIG. 1 shows a wireless local loop digital cellular ...
|
|
|
Robust, efficient, location-related measurement
Determining the location of standard, wireless radio frequency (RF), communications transmitter/receivers ("transceivers") based on their communications offers the ...
|
|
|
Wireless terminal positioning method and apparatus
An object of the present invention is to improve precision in estimation. According to the present invention, the triangulation method is used to calculate a plurality ...
|
|
|
Apparatus and method for testing a memory array
The limitations inherent in the prior art are overcome by the present invention which provides a central ABIST controller which controls a plurality of ABIST test ...
|
|
|
Keyboard for personal information device
The present invention provides a compact easy-to-use M-key keyboard that requires a relatively insignificant amount of power to process the input data. The method ...
|
|
|
Computer input stylus and thickness control system
It is therefore one object of the present invention to provide an improved computer system. It is another object of the present invention to provide an improved computer-...
|
|
|
Word processor for generating Chinese characters
The main object of the present invention is to provide a word processor which is operable to produce and display desired Chinese characters on a monitor by inputting the ...
|
|
|
System and method for scaleable encoding and decoding of variable bit frames
In accordance with the invention there is provided a 1. A method of encoding and decoding data in a digital communication system comprising the steps of: a) providing a ...
|
|
|
Object position detector with edge motion feature and gesture recognition
OF A PREFERRED EMBODIMENT This application is a continuation-in-part of co-pending application Ser. No. 08/300,387, filed Sep. 2, 1994, which is a continuation-in-part ...
|
|
|
Ring Tones 
