Method and apparatus for multiterminal support using bluetooth based audio gateway

• US 8,401,520 B2
• Filed: 01/28/2008
• Issued: 03/19/2013
• Est. Priority Date: 08/30/2007
• Status: Active Grant

• Current Assignee: LTIMindtree Ltd. (Larsen & Toubro Limited)
• Original Assignee: Mindtree Limited (Larsen & Toubro Limited)
• Inventors: Govindachari, Raghunath, Shivadatta, Santosh, Saha, Shubhankar
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): Gu, Andy
• Application Number:
  US12/011,556
• Publication Number:
  US 20090061822A1
• Time in Patent Office: 1,877 Days
• Field of Search: 455/411
• US Class Current: 455/411
• CPC Class Codes: H04M 1/6066 including a wireless connection
• CPC Class Codes: H04M 2250/02 including a Bluetooth interface
• CPC Class Codes: H04W 12/065 Continuous authentication
• CPC Class Codes: H04W 12/068 using credential vaults, e.g. password manager applications or one time password [OTP] applications

Abstract

Disclosed herein is a method and system for establishing a local conferencing session amongst a plurality of Bluetooth enabled terminal units. An audio gateway is provided to interconnect a voice network and the terminal units. A session management entity is provided on the audio gateway and each of the terminal units. A local conferencing session setup is established prior to the conference session wherein a set of common session parameters is shared among the audio gateway and the terminal units through the respective session management entities. The common session parameters enable Bluetooth communication between the audio gateway and the terminal units. The audio gateway broadcasts the voice packets from the voice network to the terminal units. The audio gateway provides microphone holder rights to a terminal unit to transfer voice packets to the voice network. Further, the audio gateway coordinates the transfer of microphone rights between the terminal units.

Claims

1. A method for establishing a local conferencing session amongst a plurality of Bluetooth enabled terminal units, comprising the steps of:

providing a Bluetooth enabled audio gateway, wherein said Bluetooth enabled audio gateway transfers voice data between a voice network and said plurality of Bluetooth enabled terminal units;

providing a terminal unit session management entity on each of the plurality of Bluetooth enabled terminal units;

providing an audio gateway session management entity on the Bluetooth enabled audio gateway;

providing a Bluetooth communication channel for transmitting Bluetooth packets between the Bluetooth enabled audio gateway and the plurality of Bluetooth enabled terminal units, wherein said Bluetooth communication channel is one of a synchronous channel and an asynchronous channel, wherein said synchronous channel is one of a primary synchronous channel and a secondary synchronous channel;

establishing a local conferencing session setup prior to said local conferencing session, comprising the steps of;

establishing a set of common session parameters on the Bluetooth enabled audio gateway, wherein said common session parameters enable Bluetooth communication between the plurality of Bluetooth enabled terminal units and the Bluetooth enabled audio gateway; and

transmitting said set of common session parameters from said audio gateway session management entity to said terminal unit session management entity of each of the plurality of Bluetooth enabled terminal units;

coordinating the usage of said Bluetooth communication channel by the audio gateway session management entity and the terminal unit session management entity of each of the plurality of Bluetooth enabled terminal units, comprising the steps of;

broadcasting first voice packets from the voice network to each of the Bluetooth enabled terminal units via the Bluetooth enabled audio gateway; and

permitting only one of the Bluetooth enabled terminal units to transmit second voice packets to the voice network via the Bluetooth enabled audio gateway, wherein said permitted terminal unit is provided with microphone holder rights for transmitting said second voice packets to the audio gateway over the primary synchronous channel on reverse voice path;

transferring said microphone holder rights from said permitted terminal unit to a requesting terminal unit by the audio gateway when said requesting terminal unit requests for said microphone holder rights;

transmitting said second voice packets from said requesting terminal unit to the audio gateway over said secondary synchronous channel during said transfer of said microphone holder rights to reduce time latency between a trigger for said request and voice transmission to said audio gateway.

2. The method of claim 1, wherein said set of common session parameters comprises a common personal identification number for authenticating the plurality of Bluetooth enabled terminal units.

3. The method of claim 1, wherein said set of common session parameters comprises a common frequency hopping technique used by the plurality of Bluetooth enabled terminal units and the Bluetooth enabled audio gateway.

4. The method of claim 1, wherein said set of common session parameters comprises definitions of types of said Bluetooth packets, wherein the Bluetooth packets are one of several control data packets and voice packets.

5. The method of claim 1, wherein said primary synchronous channel is used for broadcasting the first voice packets and the second voice packets.

6. The method of claim 1, wherein said Bluetooth asynchronous channel is used for broadcasting the first voice packets and the second voice packets.

7. The method of claim 1, wherein said set of common session parameters comprises an offset and duration for the Bluetooth synchronous channel.

8. The method of claim 1, wherein said set of common session parameters comprises a commonly defined air mode used for encoding said first voice packets and said second voice packets.

9. The method of claim 1, wherein said step of transmitting said set of common session parameters is via the asynchronous channel.

10. The method of claim 1, wherein said microphone holder rights are transferred from an incumbent terminal unit to a requesting terminal unit by the audio gateway session management entity.

11. The method of claim 10, wherein during said transfer of microphone holder rights, said requesting terminal unit transfers the second voice packets over the secondary synchronous channel, whereby time latency during the transfer is reduced.

12. The method of claim 1, wherein said permitted Bluetooth enabled terminal unit transmits said second voice packets over the Bluetooth asynchronous channel, wherein said permitted Bluetooth enabled terminal unit is provided with microphone holder rights.

13. The method of claim 12, wherein said permitted Bluetooth enabled terminal unit is polled by the audio gateway session management entity for facilitating said transmission of the second voice packets over the Bluetooth asynchronous channel.

14. The method of claim 1, wherein said set of common session parameters are invalidated when said local conferencing session is terminated.

15. The method of claim 1, wherein said audio gateway session management entity manages a record of the plurality of Bluetooth enabled terminal units participating in said local conferencing session.

16. A system for establishing a local conferencing session amongst a plurality of Bluetooth enabled terminal units, comprising:

a Bluetooth enabled audio gateway for providing a wireless interconnect between a voice network and said plurality of Bluetooth enabled terminal units, comprising;

an audio gateway session management entity configured for;

sharing a set of common session parameters to the plurality of Bluetooth enabled terminal units, wherein said common session parameters enable Bluetooth communication between the plurality of Bluetooth enabled terminal units and the Bluetooth enabled audio gateway;

and transferring microphone holder rights from a permitted terminal unit to a requesting terminal unit by the audio gateway when said requesting terminal unit requests for microphone holder rights, wherein said permitted terminal unit is provided with microphone holder rights for transmitting said second voice packets to the audio gateway over a primary synchronous channel;

an audio gateway registry for storing said set of common session parameters and participant information of the plurality of Bluetooth enabled terminal units;

an audio gateway voice switch for providing a Bluetooth communication channel for routing voice packets between said voice network and the plurality of Bluetooth enabled terminal units, wherein said Bluetooth communication channel is one of a synchronous channel and an asynchronous channel, wherein said synchronous channel is one of said primary synchronous channel and a secondary synchronous channel;

each of said plurality of Bluetooth enabled terminal units comprising;

a terminal unit session management entity for enabling said Bluetooth enabled terminal unit to participate in said local conferencing session using the set of common session parameters;

said secondary synchronous channel for transmitting voice packets from said requesting terminal unit to the Bluetooth enabled audio gateway during said transfer of microphone holder rights to reduce time latency between a trigger for said request and voice transmission to said audio gateway.

17. The system of claim 16, wherein each of said plurality of Bluetooth enabled terminal units comprises a storage means for registering a user'"'"'s human machine interface events.

18. The system of claim 16, wherein said Bluetooth audio gateway comprises a voice network interface for connecting to said voice network.

19. The system of claim 16, further comprises a Bluetooth communication channel for transferring Bluetooth packets between the audio gateway and the plurality of Bluetooth enabled terminal units, wherein said Bluetooth packet is one of a voice packet and a control data packet.

20. The system of claim 19, wherein said Bluetooth communication channel is one of a synchronous channel and an asynchronous channel.

21. The system of claim 16, wherein said set of common session parameters comprises a common authentication personal identification number, standard voice packet types, offsets and a duration for said Bluetooth synchronous communication channel.

22. The system of claim 16, wherein said participant information comprises a record of the participating Bluetooth enabled terminal units and the identity of the permitted Bluetooth enabled terminal unit.

23. The system of claim 20, wherein said synchronous channel wirelessly connects the Bluetooth enabled audio gateway and the plurality of Bluetooth enabled terminal units.

24. The system of claim 23, wherein said synchronous channel comprises a primary synchronous channel used for transmitting voice packets between the plurality of Bluetooth enabled terminal units and the Bluetooth enabled audio gateway.

25. A computer program product comprising computer executable instructions embodied in a non-transitory computer readable medium, said computer program product comprising:

a first computer parsable program code for establishing a local conferencing session setup prior to initializing a local conferencing session amongst a plurality of Bluetooth enabled terminal units comprising;

a second computer parsable program code for establishing a set of common session parameters on a Bluetooth enabled audio gateway; and

a third computer parsable program code for transmitting said set of common session parameters from an audio gateway session management entity of said Bluetooth enabled audio gateway to a terminal unit session management entity of each of said plurality of Bluetooth enabled terminal units;

a fourth computer parsable program code for coordinating the usage of a Bluetooth communication channel between the Bluetooth enabled audio gateway and the plurality of Bluetooth enabled terminal units, comprising;

a fifth computer parsable program code for broadcasting first voice packets from the Bluetooth enabled audio gateway voice network to each of the Bluetooth enabled terminal units; and

a sixth computer parsable program code for permitting only one of the Bluetooth enabled terminal units to transmit second voice packets to the Bluetooth enabled audio gateway, wherein said permitted terminal unit is provided with microphone holder rights for transmitting said second voice packets to the audio gateway over a primary synchronous channel;

a seventh computer parsable program code for transferring said microphone holder rights from said permitted terminal unit to a requesting terminal unit by the audio gateway when said requesting terminal unit requests for microphone holder rights;

a eighth computer parsable program code for transmitting said second voice packets from said requesting terminal unit to the audio gateway over a secondary synchronous channel during said transfer of said microphone holder rights to reduce time latency between a trigger for said request and voice transmission to said audio gateway.