Internet SIP registration/proxy service for audio conferencing
View Patent ↗To enable internet softphone users to join to calls hosted at an audio conferencing bridge, a SIP Invite may be received at a bridge interface layer of an audio conferencing system. Parameters of the SIP Invite may be extracted, e.g. from one or more X-header fields and processed to enable the internet softphone to be joined to an audio conferencing bridge. The bridge interface layer may receive a SIP Refer message from the audio conferencing bridge that indicates a second audio conferencing bridge external to the system. The bridge interface layer may forward the SIP Invite to the second audio conferencing bridge and the RTP media may be established through the session border controller (SBC) of the audio conferencing system.
1. An audio conferencing system comprising:
a session border controller;
an audio conferencing bridge; and
a bridge interface layer configured to:
receive a SIP Invite comprising one or more parameters of an audio conference from an internet softphone, the SIP Invite comprising the one or more parameters of the audio conference;
process the one or more of the parameters of the SIP Invite;
route the SIP Invite to the bridge interface layer;
receive a message from the audio conferencing bridge that the audio conference is homed at a second audio conferencing system;
determine a passcode from the SIP Invite;
determine that the passcode is homed in a second audio conferencing bridge;
respond to the SIP Invite with a SIP 302 message that indicates the second audio conferencing bridge in which the passcode is homed; and
redirect the SIP Invite to the second bridge interface layer of the second audio conferencing bridge via a SIP Refer;
wherein the audio conferencing system is configured to establish an RTP media stream to a second audio conferencing bridge of the second audio conferencing system via the session border controller.
2. The audio conferencing system of claim 1 wherein the bridge interface layer is configured to provide the SIP Invite to the audio conferencing bridge.
3. The audio conferencing system of claim 1 wherein the bridge interface layer is configured to:
receive the SIP Refer message from the audio conference bridge; and
provide the SIP Refer to the internet softphone.
4. The audio conferencing system of claim 1 wherein the bridge interface layer is configured to provide an Authentication of the SIP Invite.
5. The audio conferencing system of claim 1 wherein the bridge interface layer is configured to:
provide a challenge to the internet softphone;
receive a challenge response from the internet softphone; and
register the internet softphone with the bridge interface layer.
6. A method for handling a SIP Invite from an internet softphone to an audio conferencing bridge, the method comprising:
receiving a SIP Invite message from the internet softphone into a bridge interface layer, the SIP Invite comprising the one or more parameters of the audio conference;
processing the one or more of the parameters of the SIP Invite in the bridge interface layer;
providing the SIP Invite from the bridge interface layer to the audio conferencing bridge in accordance with the one or more processed parameters of the SIP Invite;
receiving a SIP Refer message in the bridge interface layer from the audio conference bridge;
providing the SIP Invite to a second audio conference bridge identified in the SIP Refer message, the second audio conference bridge being external to the audio conferencing system;
determining a passcode from the SIP Invite;
determining that the passcode is homed in the second audio conferencing bridge; and
responding to the SIP Invite message with a SIP 302 message that indicates the second audio conferencing bridge in which the passcode is homed; and
establishing an RTP media stream to the second audio conferencing bridge via a session border controller of the audio conferencing system.
7. The method of claim 6 comprising:
providing the SIP Refer message to the internet softphone.
8. The method of claim 6 comprising:
providing a challenge to the internet softphone;
receiving a challenge response from the internet softphone; and
registering the internet softphone with the bridge interface layer.
9. A non-transitory computer-readable storage medium comprising instructions for:
receiving a SIP Invite message from the internet softphone into a bridge interface layer, the SIP Invite comprising the one or more parameters of the audio conference;
processing the one or more of the parameters of the SIP Invite in the bridge interface layer;
providing the SIP Invite from the bridge interface layer to the audio conferencing bridge in accordance with the one or more processed parameters of the SIP Invite;
receiving a SIP Refer message in the bridge interface layer from the audio conference bridge;
providing the SIP Invite to a second audio conference bridge identified in the SIP Refer message, the second audio conference bridge being external to the audio conferencing system;
determining a passcode from the SIP Invite;
determining that the passcode is homed in the second audio conferencing bridge; responding to the SIP Invite message with a SIP 302 message that indicates the second audio conferencing bridge in which the passcode is homed; and
establishing an RTP media stream to the second audio conferencing bridge via a session border controller of the audio conferencing system.
10. The non-transitory computer-readable storage medium of claim 9 comprising instructions for:
providing the SIP Refer message to the internet softphone.