Push-to-talk apparatus and method for communication between an application server and media resource function processor
View Patent ↗An exemplary embodiment of an apparatus for performing push-to-talk communications over a wireless network comprises a push-to-talk (PTT) server including an application server (AS) and a media resource function processor (MRFP) configured to communicate with user equipment over a wireless link. The application server includes a media resource function controller (MRFC), and the MRFP is configured to provide floor control in a push-to-talk session. In one aspect of the invention, a plurality of handsets if provided where each handset is capable of communicating with an application server and each handset includes a floor request switch configured to selectively generate a floor request signal. The MFRP is configured to receive a floor request signal and to selectively grant floor control to a requesting user. Advantages of the invention include an efficient technique for providing push-to-talk communications.
1. An apparatus for performing push-to-talk communications over a wireless network, comprising:
a push-to-talk (PTT) server including an application server and a media resource function processor (MRFP), the PTT server configured to communicate with user equipment over a wireless link, wherein
the application server includes a media resource function controller (MRFC) for interpreting a plurality of requests from the application server and for controlling a plurality of media streams in the MRFP, wherein
the MRFP is allocated by the MRFC to provide on-going floor control in a push-to-talk session, and wherein
the MRFP controls the floor state independent of the MRFC.
2. The apparatus of claim 1 , further comprising:
a plurality of handsets, each handset capable of communicating with a PTT server and each handset including a floor request switch configured to selectively generate a floor request signal; and
wherein the MFRP is configured to receive a floor request signal and to selectively grant floor control to a requesting user.
3. The apparatus of claim 1 , wherein:
the PTT server includes a plurality of MRFPs each configured to provide floor control in a push-to-talk session.
4. The apparatus of claim 1 , wherein:
the MRFC is configured to communicate call configuration setup to the MRFP, and the MRFP is configured to perform floor control independently until the call is terminated by the MRFC.
5. A method for performing push-to-talk (PTT) communications over a wireless network, using a PTT server, the PTT server including an application server (AS) having a media resource function controller (MRFC), and a media resource function processor (MRFP), the PTT server configured to communicate with user equipment over a wireless link, comprising the steps of:
communicating between the MRFP and the MRFC, wherein the communicating includes,
activating a floor control mechanism by the MRFC, and
allocating the floor control mechanism to the MRFP by the MRFC such that the
MRFC is no longer capable of controlling a floor state;
receiving a floor request from a user equipment in the MRFP; and
determining whether to grant the floor request to the user equipment by the MRFP.
6. The method of claim 5 , wherein the communicating step includes using H.248 protocol.
7. The method of claim 5 , wherein the communicating step includes,
communicating call configuration setup by the MRFC to the MRFP and call teardown at the end of the PTT session.
8. The method of claim 5 , wherein the communicating step includes,
the MRFC subscribing to the MRFP specifying Talk Burst parameters that are included in subsequent notifications, and
the MRFP sending a NOTIFY message to the MRFC after having changed the floor state.
9. The method of claim 8 , wherein:
the NOTIFY message contains the floor state.
10. The method of claim 8 , wherein: the NOTIFY message contains Talk Burst Length.
11. The method of claim 8 , wherein:
the NOTIFY message contains Talk Burst Start Time.
12. The method of claim 8 , wherein:
the NOTIFY message contains Talk Burst End Time.
13. The method of claim 8 , wherein:
the notification contains RTP Packets Received.
14. The method of claim 8 , wherein:
the NOTIFY message contains the Identities of sending and receiving user equipment.
15. The method of claim 5 , wherein the user equipment includes a sending handset, and wherein the communicating step includes the MRFP sending a Restricted Termination Event to the MRFC when the sending handset continues to send media beyond an allowed time.
16. The method of claim 15 , wherein:
the Restricted Termination Event contains Restricted User State.
17. The method of claim 15 , wherein:
the Restricted Termination Event contains Restriction Type.
18. The method of claim 15 , wherein:
the Restricted Termination Event contains Number of Talk Bursts.
19. The method of claim 15 , wherein:
the Restricted Termination Event contains Talk Bursts Received Duration.
20. The method of claim 5 , wherein the communicating step includes communication during call setup and teardown, but not during the call.