Method and apparatus for providing voice path assurance testing through a packet network
A method and apparatus for voice path assurance (VPA) testing in a packet network such as an Internet Protocol (IP) network is provided. More specifically, the invention relates to a voice path assurance (VPA) testing technique that is initiated by the terminating side of a logical connection through an IP network. The technique of the present invention is used to verify connectivity and performance—during a call set-up procedure—between the terminating endpoint and the originating endpoint of the logical connection through the IP network.
1. A method for voice path assurance testing through a communication system, the system comprising an originating endpoint in communication with a packet network and a terminating endpoint in communication with the packet network, the method comprising:
sending a logical connection request by the originating endpoint, the logical connection request comprising a voice path assurance token;
receiving the logical connection request by the terminating endpoint;
determining that the token is present in the logical connection request by the terminating endpoint;
selectively performing a voice path assurance test on a bearer path between the terminating endpoint and the originating endpoint through the packet network, the performing being initiated by the terminating endpoint and based on the presence of the token, wherein the performing further comprises transmitting data packets from the terminating endpoint to the originating endpoint to be looped-back to the terminating endpoint, wherein the data packets comprise at least one of a timestamp and a sequence number; and,
selectively acknowledging the logical connection request by the terminating endpoint based on the result of the voice path assurance test.
2. The method as set forth in claim 1 wherein the logical connection request is a SET-UP message.
3. The method as set forth in claim 2 wherein the token is a parameter of the SET-UP message.
4. The method as set forth in claim 1 further comprising establishing a loop-back by the originating endpoint.
5. The method as set forth in claim 1 wherein the data packets further comprise a selected payload type indicator.
6. The method as set forth in claim 1 wherein the data packets further comprise a well known UDP port at the first endpoint.
7. A system useful for voice path assurance testing through a communication system, the system comprising:
an originating endpoint in communication with a packet network, the originating endpoint being operative to send a logical connection request through the packet network, wherein the logical connection request comprises a voice path assurance token; and,
a terminating endpoint in communication with the packet network, the terminating endpoint being operative to receive the logical connection request, being operative to determine that the token is present in the logical connection request, being operative to selectively initiate a voice path assurance test on a bearer path between the terminating endpoint and the originating endpoint through the packet network, and being operative to selectively acknowledge the logical connection request based on the voice path assurance test, wherein the terminating endpoint is further operative to selectively perform the voice path assurance test by transmitting data packets from the terminating endpoint to the originating endpoint to be looped-back to the terminating endpoint, wherein the data packets comprise at least one of a timestamp and a sequence number.
8. The system as set forth in claim 7 wherein the logical connection request is a SET-UP message.
9. The system as set forth in claim 8 wherein the token is a parameter of the SET-UP message.
10. The system as set forth in claim 7 wherein the originating endpoint is further operative to establish a loop-back.
11. The system as set forth in claim 7 wherein the data packets further comprise a selected payload type indicator.
12. The system as set forth in claim 7 wherein the data packets further comprise a well known UDP port at the originating endpoint.
13. A system for voice path assurance testing through a communication network, the system comprising:
means for sending a logical connection request through the network, the logical connection request comprising a voice path assurance token;
means for receiving the logical connection request;
means for determining that the token is present in the logical connection request;
means for selectively performing, based on the token, a voice path assurance test on a bearer path between a terminating endpoint corresponding to the receiving means and an originating endpoint corresponding to the sending means through the packet network, wherein the receiving means selectively initiates the voice path assurance test, wherein the means for selectively performing the voice path assurance test comprises means for transmitting data packets from the terminating endpoint to the originating endpoint to be looped-back to the terminating endpoint, wherein the data packets comprise at least one of a timestamp and a sequence number; and,
means for selectively acknowledging the logical connection request based on the result of the voice path assurance test.
14. The system as set forth in claim 13 wherein the logical connection request is a SET-UP message.
15. The system as set forth in claim 14 wherein the token is a parameter of the SET-UP message.
16. The system as set forth in claim 13 further comprising means for establishing a loop-back.
17. The system as set forth in claim 13 wherein the data packets further comprise a selected payload type indicator.
18. The system as set forth in claim 13 wherein the data packets further comprise a well known UDP port at the originating endpoint.