Telecommunication network with mobile voice conferencing system and method

• US 6,163,692 A
• Filed: 05/28/1998
• Issued: 12/19/2000
• Est. Priority Date: 05/28/1998
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Mishra, Amitabh, Chakrabarti, Satyabrata
• Primary Examiner(s): Trost, William G.
• Assistant Examiner(s): CRAVER, CHARLES R
• Application Number:
  US09/086,400
• Time in Patent Office: 936 Days
• Field of Search: 455/416, 455/414, 455/417, 455/519, 455/445, 455/422, 455/433, 455/560, 455/464, 455/439, 379/112, 379/203, 379/204, 379/207, 379/242, 379/230, 379/93.14, 370/264, 370/524, 370/261
• US Class Current: 455/416
• CPC Class Codes: H04M 2203/2088 Call or conference reconnect, e.g. resulting from isdn terminal portability
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 2207/20 hybrid systems
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15
• CPC Class Codes: H04M 7/12 for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A telecommunication network including one or more personal communication networks with a conference bridge for making voice conference connections between some of a plurality of mobile telephones associated with a personal communication network having a plurality of mobile subnetworks respectively for providing mobile telephone service to the plurality of mobile telephones as well as with fixed-location or non-mobile telephones associated with a Public Switched Telephone Network switching center provided with a disconnection voice conferencing system that detects disconnection of a communication link between any one of the mobile telephones and the communications bridge, distinguishes between an intentional disconnection and accidental disconnection of the one mobile telephone, and if the disconnection is determined to have been unintentional, automatically establishes reconnection of the communication link.

Claims

1. In a telecommunication network including a plurality of mobile telephones and a conference bridge for establishing voice conference connections between a plural number of the plurality of mobile telephones when communication linked with the conference bridge, the improvement being a connection recovering, mobile, telephonic, voice conferencing system, comprising:

means for detecting disconnection of a conference communication link between any one mobile telephone of the plural number mobile telephones and the conference bridge, wherein any one mobile telephone having means for actuating a general end call function to generate a general call termination signal;

means responsive to the detecting means for sensing that any one mobile telephone is participating in a voice conference;

means responsive to the sensing means and actuation of the general end function to also automatically transmit a conference termination signal when the general call function is actuated while the mobile telephone is participating in a voice conference; and

means responsive to the sensing means for automatically establishing reconnection of the conference communication link between the one mobile telephone and the conference bridge upon disconnection of the conference communication link without detection of the general call termination signal.

2. The telecommunication network of claim 1 in which the detecting means includes

means for distinguishing between an intentional disconnection initiated by action taken at the one mobile telephone and unintentional disconnection resulting from other causes, and

means for providing an indication of disconnection to the re-establishing means only in response to detection of an intentional disconnection.

3. The telecommunication network of claim 2 in which

the one mobile telephone includes means for transmitting a conference disconnect signal indicating an intention to disconnect from the conference, and

the distinguishing means includes means responsive to receipt of the conference disconnect signal to distinguish between intentional disconnection and unintentional disconnection.

4. The telecommunication system of claim 3 in which

the one mobile telephone includes means for transmitting a conference termination signal indicating an intention to both disconnect from and to end the conference, and

the distinguishing means includes means responsive to receipt of the conference termination signal to distinguish between intentional disconnection and unintentional disconnection.

5. The telecommunication system of claim 2 in which

the one mobile telephone includes means for transmitting a conference termination signal indicating an intention both to disconnect from and to end the conference, and

the distinguishing means includes means responsive to receipt of the conference termination signal to distinguish between intentional disconnection and unintentional disconnection.

6. The telecommunication network of claim 2 in which

the one mobile telephone includes

means for actuating a general end call function to transmit a general call termination signal, and

means for sensing that the mobile telephone is participating in a voice conference, and

said distinguishing means includes means responsive to actuation of the general end call function to distinguish between an intentional disconnection and an unintentional disconnection.

7. The telecommunication network of claim 6 in which

the one mobile telephone includes means responsive both to the sensing means and actuation of the general end function to transmit a conference disconnect signal when the general call end function is actuated while the mobile telephone is participating in a voice conference, and

the distinguishing means includes means responsive to receipt of the termination of conference signal to distinguish between an intentional disconnection and an unintentional disconnection.

8. The telecommunication network of claim 7 in which the one mobile telephone includes means responsive to actuation of the termination of call function to generate an termination of call signal both when participating in the conference and when not participating in the conference.

9. The telecommunication network of claim 1 in which the detecting means includes

means for monitoring the connection status of the communication link of the one mobile telephone with a communication port of the conference bridge, and

means responsive to the monitoring means detecting disconnection of the communication link for distinguishing between an intentional disconnection and an unintentional disconnection.

10. The telecommunication network of claim 9 in which the detecting means includes means responsive to the monitoring means and to receipt of a connection termination message from the one mobile telephone prior to the disconnection for distinguishing an intentional disconnection from an unintentional disconnection.

11. The telecommunication network of claim 1 including

means for terminating the voice conference, and

means responsive to termination of the conference to disable the reconnection establishing means.

12. The telecommunication network of claim 11 in which the terminating means includes at least one of

means responsive to lapse of a pre-selected maximum conference time limit,

means responsive to receipt of an termination conference signal from the one mobile telephone, and

means responsive to the number of participants to the conference falling below a pre-selected minimum participant number limit.

13. The telecommunication network of claim 12 in which

the terminating means is responsive to at least one of an conference termination signal and an end conference signal from the one mobile telephone, and

the mobile telephone includes means to transmit the at least one of the conference termination signal and an conference disconnect signal.

14. The telecommunication network of claim 12 in which the terminating means does not consider participants that have been unintentionally disconnected and with respect to which the reconnection establishing means is attempting to establish reconnection of the communication link when determining if the number of participants has fallen below the pre-selected minimum limit.

15. The telecommunication network of claim 12 in which,

the conference terminating means includes

means responsive to the maximum conference time limit, and in which the conference bridge is connectable with non-mobile participants, and

including

means for enabling only a mobile participant to establish the pre-selected maximum conference time limit.

16. The telecommunication network of claim 1 in which the detecting means includes at least one of

means for sensing disconnection of the communication link caused by interruption in a land line section of the link between a mobile switching center serving the mobile participant and a mobile switching center with which the conference bridge is associated,

means for sensing disconnection of the communication link causes by interruption in a land line section of the link between a mobile base station associated with both the one subscriber and the mobile switching center and the mobile switching center, and

means for sensing disconnection of the communication link caused by a interruption in an air wave section of the link between the one mobile participant and the mobile switching center serving the mobile participant during the course of the voice conference.

17. The telecommunication network of claim 16 in which said detecting means includes all of the disconnection sensing means.

18. The telecommunication network of claim 16 in which said detecting means includes the means for sensing disconnection of the air wave link.

19. The telecommunication network of claim 1 including

a mobile switching center interconnected between a public switched telephone network and a plurality of subnetworks with at least one of the subnetworks associated with the one mobile telephone to provide mobile air wave communication service to the one mobile telephone, and in which

the one mobile telephone includes means for transmitting a signal to the associated subnetwork,

the associated subnetwork includes means for sending a conference request message to the mobile switching center in response to the signal from the one mobile telephone,

the mobile switching center includes means responsive to the conference request message to cause connection of the one mobile telephone to the conference bridge,

the reconnection establishing means includes means at the associated subnetwork for actuating the conference request message sending means to send a conference request message to the mobile switching center to establish reconnection of the communication link with the one mobile telephone automatically in response to the detecting means detecting disconnection of the communication link with the one mobile telephone.

20. The telecommunication network of claim 19 in which

the reconnection establishing means includes means for monitoring the detecting means for determining whether automatic sending of the conference request message has resulted in re-establishing the connection of the one mobile telephone, and

said actuating means is responsive to the monitoring means to actuate the conference request message to be sent repeatedly if it is determined that a prior automatic sending of the conference request message has failed to result in re-establishment of the connection with the one mobile party.

21. The telecommunication network of claim 20 in which the actuating means is responsive to the monitoring means to stop repeatedly sending the conference request message in response to occurrence of at least one of the events of

establishment of the connection in response to the conference request message,

passage of a pre-selected time period after a first actuation of the conference request message sending means, and

the actuating means sending the conference request message a pre-selected maximum number of times.

22. The telecommunication network of claim 21 in which the actuating means is responsive to the first to occur of the events to stop repeatedly sending the conference request message.

23. The telecommunication network of claim 20 including means for disabling the actuating means in response to termination of the conference prior to establishment of the reconnection of the communication link with the one mobile telephone.

24. The telecommunication network of claim 19 in which the re-establishing means includes

means for establishing a maximum limit to the number of times that unsuccessful attempts are to be made to reestablish connection with the one mobile telephone,

means for monitoring the number of times that the conference request message is automatically sent to re-establish communication with the one mobile telephone, and

means responsive to the monitoring means and to the maximum limit establishing means for terminating further attempts to re-establish connection of the communication link with the one mobile telephone after the number of attempts equals the maximum limit.

25. The telecommunication network of claim 1 in which

an initiator mobile telephone from which the conference is initiated is included in the plural number of mobile telephones,

the initiator mobile telephone at any given time is located within the service area of an initiator current service subnetwork of a plurality of mobile subnetworks of a personal communication mobile network that is part of the telecommunication network, and

the personal communication mobile network includes means for storing global state information about the voice conference.

26. The telecommunication network of claim 25 in which

the initiator mobile telephone has one relatively permanently associated initiator home subnetwork of the plurality of mobile subnetworks of the personal communication mobile network, and

said global state information storing means includes means at the initiator home subnetwork for storing the global state information.

27. Telecommunication network of claim 26 in which

the initiator mobile telephone at any given time is in a service area and currently receives service from an initiator current service subnetwork, and

the global state information storing means includes means at the initiator current service subnetwork for separately storing the global state information when the initiator mobile telephone is in a service area other than a service area of the relatively permanently associated initiator home subnetwork.

28. The telecommunication network of claim 27 in which the initiator current service subnetwork includes means for acquiring the global state information about the voice conference,

means for ascertaining whether the initiator current service subnetwork is different from the initiator home subnetwork,

means responsive to the ascertaining means for transmitting the global state information from the initiator current service subnetwork to the initiator home subnetwork for duplicate storage of the global information at the initiator home subnetwork when the initiator current service subnetwork is different from the initiator home subnetwork.

29. The telecommunication network of claim 25 in which the global state information includes

conference start time,

current time,

conference bridge node address,

number of communication ports of the conference bridge being currently used to connect with individual conference participants, and

for each participant,

a unique identification code of the mobile telephone of the participant,

a unique identification code of each service subnetwork currently serving the mobile telephone of the participant,

a unique identification code of the home subnetwork of the mobile telephone of the participant,

the status of the connection between the service subnetwork currently servicing the mobile telephone of the participant and the mobile telephone of the participant, and

the status of the connection of the communication link between the service subnetwork and the conference bridge.

30. The telecommunication network of claim 29 in which the status of the connection of the communication link between the initiator current service subnetwork of the mobile telephone and the mobile telephone is indicated as one of active, voluntary inactive and involuntary inactive.

31. The telecommunication network of claim 29 in which the status of the connection of the communication link between the current service subnetwork and the a control node of the conference bridge is indicated as one of active, voluntary inactive and involuntary inactive.

32. The telecommunication network of claim 25 including means for updating the global state information.

33. The telecommunication network of claim 32 in which the global state information updating means includes

means for detecting a change in the global state information, and

means responsive to the change detecting means for updating the global state information only when a change is detected.

34. The telecommunication network of claim 32 in which the global state information updating means includes means for generating update information representative of only portions of the global state information that have changed.

35. The telecommunication network of claim 25 in which

the initiator mobile telephone is relatively permanently associated with an initiator home subnetwork, and

the initiator current service includes means to acquire the global state information and means to convey the acquired global state information to the initiator home subnetwork.

36. In a telecommunication network including a plurality of mobile telephones and a conference bridge for making voice conference connections between a plural number of the plurality of mobile telephones when communication linked with the conference bridge, the improvement being a connection recovering, mobile voice conferencing method, comprising the steps of:

associating one mobile telephone from the plurality of mobile telephones with at least one of a plurality of subnetworks of a mobile switching center interconnected between a public switched telephone;

transmitting a signal from the one mobile telephone to the associated subnetwork,

sending a conference request message from the associated subnetwork to the mobile switching center in response to the signal from the one mobile telephone;

making connection at the mobile switching center of the one mobile telephone to the conference bridge in response to receipt of the conference request message,

detecting disconnection of a conference communication link between any one mobile telephone of the plural number mobile telephones and the conference bridge; and

automatically establishing reconnection of the conference communication link between the one mobile telephone and the conference bridge in response to detection of disconnection by sending from the associated subnetwork the conference request message to the mobile switching center to establish reconnection of the communication link with the one mobile telephone automatically in response to detecting disconnection of the communication link with the one mobile telephone.

37. The method of claim 36 including the steps of

distinguishing between an intentional disconnection initiated by action taken at the one mobile telephone and unintentional disconnection resulting from other causes, and

providing an indication of disconnection to the re-establishing means only in response to detection of an intentional disconnection.

38. The method of claim 36 in which the step of detecting includes the steps of monitoring the connection status of the communication link of the one mobile telephone with a communication port of the conference bridge, and

distinguishing between an intentional disconnection and an unintentional disconnection upon detection of the disconnection of the communication link.

39. The method of claim 36 including the steps of

terminating the voice conference, and

disabling performance of the step of establishing reconnection.

40. The method of claim 36 in which the step of detecting includes at least one of the steps of

sensing disconnection of the communication link caused by interruption in a land line section of the link between a mobile switching center serving the mobile participant and a another mobile switching center with which the conference bridge is associated,

sensing disconnection of the communication link causes by interruption in a land line section of the link between a mobile base station associated with both the one subscriber and the mobile switching center and the mobile switching center, and

sensing disconnection of the communication link caused by a interruption in an air wave section of the link between the one mobile participant and the mobile switching center serving the mobile participant during the course of the voice conference.

41. The method of claim 36 including the steps of

initiating the conference from an initiator mobile telephone included in the plural number of mobile telephones that is located within the service area of an initiator current service subnetwork of a plurality of mobile subnetworks of a personal communication mobile network that is part of the telecommunication network, and

storing global state information about the voice conference within the personal communication mobile network.