Call flow system and method use in VoIP telecommunication system

• US 20070206580A1
• Filed: 08/24/2006
• Published: 09/06/2007
• Est. Priority Date: 03/02/2006
• Status: Active Grant

• Current Assignee: Tango Networks Incorporated
• Original Assignee: Tango Networks Incorporated
• Inventors: Lewis, Lathan, Silver, Andrew, Landgren, Patricia
• Granted Patent: US 7,873,032 B2
• Time in Patent Office: Days
• US Class Current: 370/356
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 65/00 Network arrangements, protocols or services for supporting real-time applications in data packet communication real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/102 Gateways arrangements for connecting between networks having differing types of switching systems, e.g. gateways, H04L12/66
• CPC Class Codes: H04L 65/1023 Media gateways
• CPC Class Codes: H04L 65/1033 Signalling gateways
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1053 IP private branch exchange [PBX] functionality entities or arrangements circuit switched PBXs H04M3/00
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1076 Screening of IP real time communications, e.g. spam over Internet telephony [SPIT]
• CPC Class Codes: H04L 65/1095 Inter-network session transfer or sharing
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/57 for integrated multimedia messaging subsystem [IMS]
• CPC Class Codes: H04M 15/63 based on the content carried by the session initiation protocol [SIP] messages
• CPC Class Codes: H04M 15/8292 Charging for signaling or unsuccessful connection
• CPC Class Codes: H04M 2203/1091 Fixed mobile conversion
• CPC Class Codes: H04M 2215/208 : IMS, i.e. Integrated Multimedia messaging Subsystem
• CPC Class Codes: H04M 3/42042 : Notifying the called party of information on the calling party details within substation equipment H04M1/57, signalling details H04Q3/72
• CPC Class Codes: H04M 3/42068 : where the identifier is used to access a profile
• CPC Class Codes: H04M 3/42102 : Making use of the called party identifier
• CPC Class Codes: H04M 3/42314 : in private branch exchanges
• CPC Class Codes: H04M 7/006 : Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04M 7/0075 : Details of addressing, directories or routing tables
• CPC Class Codes: H04M 7/009 : in systems involving PBX or KTS networks
• CPC Class Codes: H04Q 2213/13034 : A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1307 : Call setup
• CPC Class Codes: H04Q 2213/13091 : CLI, identification of calling line
• CPC Class Codes: H04Q 2213/13098 : Mobile subscriber
• CPC Class Codes: H04Q 2213/13109 : Initializing, personal profile
• CPC Class Codes: H04Q 2213/13176 : Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/1318 : Ringing
• CPC Class Codes: H04Q 2213/13196 : Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13204 : Protocols
• CPC Class Codes: H04Q 2213/1322 : PBX
• CPC Class Codes: H04Q 2213/13224 : Off-net subscriber, dial in to/out from network, teleworking
• CPC Class Codes: H04Q 2213/13296 : Packet switching, X.25, frame relay
• CPC Class Codes: H04Q 2213/13348 : Channel/line reservation
• CPC Class Codes: H04Q 2213/13384 : Inter-PBX traffic, PBX networks, e.g. corporate networks
• CPC Class Codes: H04Q 2213/13389 : LAN, internet
• CPC Class Codes: H04Q 2213/13405 : Dual frequency signaling, DTMF
• CPC Class Codes: H04Q 2213/13407 : Detection of data transmission mode
• CPC Class Codes: H04Q 3/0025 : Provisions for signalling
• CPC Class Codes: H04Q 3/0045 : involving hybrid, i.e. a mixture of public and private, or multi-vendor systems
• CPC Class Codes: H04Q 3/62 : for connecting to private branch exchanges
• CPC Class Codes: H04Q 3/72 : Finding out and indicating number of calling subscriber
• CPC Class Codes: H04W 28/0289 : Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 4/16 : Communication-related supplementary services, e.g. call-transfer or call-hold
• CPC Class Codes: H04W 4/20 : Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 40/00 : Communication routing or communication path finding
• CPC Class Codes: H04W 40/02 : Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 40/22 : using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 40/30 : for proactive routing
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/12 : Setup of transport tunnels
• CPC Class Codes: H04W 76/19 : Connection re-establishment
• CPC Class Codes: H04W 76/20 : Manipulation of established connections
• CPC Class Codes: H04W 76/22 : Manipulation of transport tunnels
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 76/30 : Connection release
• CPC Class Codes: H04W 8/12 : between location registers or mobility servers
• CPC Class Codes: H04W 8/26 : Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/00 : Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/16 : WPBX [Wireless Private Branch Exchange]
• CPC Class Codes: H04W 88/16 : Gateway arrangements
• CPC Class Codes: H04W 92/02 : Inter-networking arrangements
• CPC Class Codes: H04W 92/06 : between gateways and public network devices
• CPC Class Codes: H05K 999/99 : dummy group

Abstract

A method of establishing a communication link between a mobile terminal of a wireless network and a subscriber of a network, such as an enterprise network, and/or a residential network.

Claims

1. A method of establishing a communication link from a mobile terminal of a wireless network to a subscriber of an enterprise network using a VoIP interconnect, comprising the steps of:

a) the mobile terminal generating an Origination Request to a gateway server of the wireless network (GS-C);

b) the GS-C conveying new call information to a gateway server of the enterprise network (GS-E) using VoIP signaling; and

c) the GS-E completing the call to the subscriber.

2. The method as specified in claim 1 wherein the GS-E provides routing information to the GS-C and facilitates connecting the mobile terminal to a Home PBX previously assigned to the subscriber.

3. The method as specified in claim 2 wherein the GS-C acknowledges the received routing information, and the GS-E provides a new contact address for the GS-E to the GS-C.

4. The method as specified in claim 3 wherein a call invitation is routed to the GS-E, and Media Server resources are requested and enabled to facilitate dialed digits to be captured for feature invocation.

5. The method as specified in claim 4 wherein the Media Server responds to the call invitation by providing allocated resources, and the GS-E sends the call invitation to the PBX for routing to the subscriber (User B).

6. The method as specified in claim 5 wherein the User B indicates that ringing is occurring to the Home PBX.

7. The method as specified in claim 6 wherein the Home PBX sends the ringing indication to the GS-E, and the GS-E propagates the ringing indication to the wireless network.

8. The method as specified in claim 7 wherein the User B answers the call, and an Answer message is sent by the Home PBX to the GS-E.

9. The method as specified in claim 8 wherein the GS-C provides the destination resource information to the Media Server, and the Media Server acknowledges.

10. The method as specified in claim 9 wherein the GS-C sends a response to call on to the wireless network, which response is acknowledge by the wireless network.

11. The method as specified in claim 10 wherein the GS-C propagates the acknowledgement to the Home PBX, and the Home PBX propagates the acknowledgment to the User B.

12. The method as specified in claim 11 wherein the User B hangs up the call, the Home PBX propagates a BYE message to the GS-E, the GS-E releases the Media Server, the Media Server acknowledges the release, and the GS-E propagates the BYE message to the wireless network.

13. A method of establishing a communication link from an enterprise PBX subscriber to a mobile phone of a wireless network using a VoIP connection, comprising the steps of:

a) the subscriber originating a call to the enterprise PBX; and

b) the enterprise PBX forking the call by delivering a call invite to a gateway server (GS) of the wireless network serving the mobile phone.

14. The method as specified in claim 13 wherein the enterprise PBX delivers a call invite to a User B desktop phone, and also to a gateway server of the enterprise network (GS-E) which allocates a media resource for insertion in a path of the call.

15. The method as specified in claim 14 wherein a Media Server acknowledges a media resource allocation.

16. The method as specified in claim 15 wherein User B indicates that ringing is occurring on the User B'"'"'s desktop phone.

17. The method as specified in claim 16 wherein a call invite for the mobile phone is sent to the wireless network, wherein the wireless network indicates that ringing is occurring on the wireless phone.

18. The method as specified in claim 17 wherein the GS-E propagates ringing to the PBX for the wireless phone.

19. The method as specified in claim 18 wherein the wireless phone indicates that the call has been answered.

20. The method as specified in claim 19 wherein the GS-E modifies media context to include a wireless port number information of the wireless phone.

21. The method as specified in claim 20 wherein the Media Server acknowledges an update of media context.

22. The method as specified in claim 21 wherein the GS-E sends an OK message to the PBX indicative that the call has been answered.

23. The method as specified in claim 22 wherein the PBX cancels the call leg to User B.

24. The method as specified in claim 23 wherein the PBX acknowledges call answer to the GS-E, and the GS-E propagates the acknowledgement to the wireless network.

25. The method as specified in claim 24 wherein the User B acknowledges the cancel call leg request, and the PBX acknowledges receipt of the request.