Method and system for implementing a push-to-talk service in a mobile radio communication network of the gsm-type

• US 20070008960A1
• Filed: 05/19/2004
• Published: 01/11/2007
• Est. Priority Date: 05/20/2003
• Status: Active Grant

• Current Assignee: T-Mobile Deutschland GmbH (Deutsche Telekom AG)
• Original Assignee: T-Mobile Deutschland GmbH (Deutsche Telekom AG)
• Inventors: Britsch, Matthias
• Granted Patent: US 8,204,041 B2
• Time in Patent Office: Days
• US Class Current: 370/389
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

The present invention relates to a method for transmitting user data via a dialled connection in a radio communication network, characterized in that the user data are transmitted as dedicated data packets upon controlled release. A dedicated push-to-talk domain is provided which is hosting push-to-talk service network nodes (PTT SNN) and application servers (AS):

Claims

1. Method for transmitting user data via a -dialled connection in a GSM-type radio communication network, wherein the user data axe transmitted as dedicated data packets upon controlled release, wherein a dedicated push-to-talk domain is provided which offers push-to talk, PTT, services and which is hosting push-to-talk service network nodes, PTT SNN, and application servers, AS, characterized in that a dynamic time slot assignment is used where the push-to-talk domain allocates it'"'"'s own timeslots and connect directly to the -base station controller, BSC, or a packet control unit, PCU, via the push-to-talk service network nodes PTT SNN.

2. Method according to claim 1, characterized in that connection between the push-to-talk domain and the done in circuit switch style using a voice channel Abis interface.

3. Method according to claim 1, characterized in that the connection between the push-to-talk domain and the BSC is done in packet switched style by connecting directly to a Packet Control Unit, PCU.

4. Method according to claim 1, characterized in that in packet based applications a Multimedia Resource Function, MRFP, is used, controlled by an application server which is acting as multi media resource controller, MRFC.

5. Method according to claim 1, characterized in that for circuit oriented architectures an IN system in combination with an existing conferencing server for CS connections is used.

6. Method according to claim 1, characterized in that signalling to end devices, MS/PC, is done via signalling channels of the GSM network and an associated general packet radio service, GPRS, network.

7. Method according to claim 1, characterized in that handling of broadcast, which is a central part of PTT communication patterns, is done via a multicast mechanism on a air interface.

8. Method according to claim 7, characterized in that each subscriber to be included in a multicast group gate information necessary to listen to a multicast channel, via GSM signalling channels, and it the subscriber wishes to contribute to a discussion on the multicast channel, a new uplink connection is set up on a different channel.

9. Method according to claim 1, characterized in that billing and administration tasks dedicated to the PTT service will be handled separately in the PTT domain.

12. Method according to claim 2, characterized in that in packet based applications a Multimedia Resource Function, MRFP, is used, controlled by an application server which is acting as multi media resource controller, MRFC.

13. Method according to claim 3, characterized in that in packet based applications a Multimedia Resource Function, MRFP, is used, controlled by an application server which is acting as multi media resource controller, MRFC.

14. Method according to claim 2, characterized in that for circuit oriented architectures an IN system in combination with an existing conferencing server for CS connections is used.

15. Method according to claim 3, characterized in that for circuit oriented architectures an IN system in combination with an existing conferencing server for CS connections is used.

16. Method according to claim 4, characterized in that for circuit oriented architectures an IN system in combination with an existing conferencing server for CS connections is used.

17. Method according to claim 2, characterized in that signalling to end devices, MS/PC, is done via signalling channels of the GSM network and an associated general packet radio service, GPRS, network.

18. Method according to claim 3, characterized in that signalling to end devices, MS/PC, is done via signalling channels of the GSM network and an associated general packet radio service, GPRS, network.

19. Method according to claim 4, characterized in that signalling to end devices, MS/PC, is done via signalling channels of the GSM network and an associated general packet radio service, GPRS, network.

20. Method according to claim 5, characterized in that signalling to end devices, MS/PC, is done via signalling channels of the GSM network and an associated general packet radio service, GPRS, network.

10. System for transmission of user data via a dialled connection in a GSM-type radio communication network, comprising a dedicated push-to-talk domain which provides push-to-talk, PTT, services and which comprises push-to-talk service network nodes;

PTT SNN, and application servers, AB, characterized in that the push-to-talk domain with its push-to-talk service network nodes is directly connected via an Abis-Interface to a base station controller, BSC, or a packet control unit, PCU, at the BSC.

11. System according to claim 10, characterized in that the packet control unit (PCU) is located in the transmission path.