Method of providing voice over IP at predefined QOS levels
AssigneeAT&T Intellectual Property II, L.P.
InventorAdrian S. Matthews
Life of this patent
Estimating the term…
Abstract
The present invention is a technique for provisioning and assessment of voice quality in Internet Protocol (IP) voice applications. A predetermined quality of service (QoS) is received from a user in the form of an acceptable packet loss. The technique measures current packet loss and delay in the network and in the terminal, and determines and optimum play-out delay for the use by a play-out adaptation routine. An actual QoS is reported back to the user. To enhance packet delay and loss measurement, a QoS engine component is placed on the terminal side of the packetizer, therefore including packetizer losses in any measurement of the network.
Claims18
A method for providing control information, comprising:
- receiving, by a device, a quality of service requirement for a service, wherein the receiving the quality of service requirement for the service comprises receiving an attribute of packet loss;
- receiving, by the device, a transport metric describing a characteristic of a network;
- determining, by the device, the control information for use by a play-out adaptation routine, the control information being based on the quality of service requirement and on the transport metric;
- and
- transmitting, by the device, the control information to the play-out adaptation routine to adapt audio data in accordance with the control information.
A terminal for use in communication over a network, comprising:
- a packetizer for extracting audio data from packets received from the network;
- a play-out adapter for modulating a flow of the audio data from the packetizer;
- and
- a quality of service engine between the play-out adapter and the packetizer, the quality of service engine for controlling a modulation of the audio data by the play-out adapter based on transport metrics of both the packetizer and the network.
An apparatus for providing control information, comprising:
- a device for receiving a quality of service requirement for a service, wherein the receiving the quality of service requirement for the service comprises receiving an attribute of packet loss, for receiving a transport metric describing characteristics of a network, for determining the control information for use by a play-out adaptation routine, the control information being based on the quality of service requirement and on the transport metric, and for transmitting the control information to the play-out adaptation routine to adapt audio data in accordance with the control information.
Dependencies are inferred from the claim text.