Source: http://www.google.ca/patents/US9219677
Timestamp: 2018-01-21 11:10:17
Document Index: 179026649

Matched Legal Cases: ['Application No. 02794890', 'application No. 01920654', 'Application No. 01920654', 'Application No. 07', 'Application No. 200780048418', 'Application No. 200880012885', 'Application No. 02794890', 'application No. 08153801', 'Application No. 07839798', 'Application No. 07867984', 'Application No. 08725747', 'Application No. 08725750', 'Application No. 08725814', 'Application No. 2112', 'Application No. 2935', 'Application No. 4447', 'Application No. 5562', 'Application No. 5563', 'Application No. 5612', 'Application No. 200780048418', 'Application No. 200780051876', 'Application No. 200880012488', 'Application No. 200880012885', 'application No. 00919712', 'Application No. 200880012488', 'Application No. 200780051876', 'Application No. 04819521', 'Application No. 200780048418', 'Application No. 200880012885', 'Application No. 08725747', 'Application No. 200880012885', 'Application No. 200780048418', 'Application No. 200880012488', 'Application No. 200880012885', 'Application No. 200780048418', 'Application No. 200780051876', 'Application No. 04']

Patent US9219677 - Methods, systems, and computer readable media for centralized routing and ... - Google Patents
The subject matter described herein includes methods, systems and computer readable media for centralized routing and call instance code management for bearer independent call control (BICC) signaling messages. One aspect of the subject matter described herein includes a system for routing BICC signaling...http://www.google.ca/patents/US9219677?utm_source=gb-gplus-sharePatent US9219677 - Methods, systems, and computer readable media for centralized routing and call instance code management for bearer independent call control (BICC) signaling messages
Publication number US9219677 B2
Application number US 12/689,702
Also published as US20100202446, WO2010083509A2, WO2010083509A3
Publication number 12689702, 689702, US 9219677 B2, US 9219677B2, US-B2-9219677, US9219677 B2, US9219677B2
Inventors Thomas M. McCann, Petrus Wilhelmus Adrianus Jacobus Maria Nas, Apirux Bantukul, Jeffrey A. Craig, Peter J. Marsico
Patent Citations (478), Non-Patent Citations (286), Referenced by (2), Classifications (9), Legal Events (4)
US 9219677 B2
a BICC signaling router having a processing and a memory, the BICC signaling router including:
a routing module for centralized routing BICC signaling messages between a plurality of BICC signaling nodes;
a call instance code management module for centralized assignment of call instance codes for BICC signaling sessions routed through the BICC signaling router, wherein centralized assignment of call instance codes includes assigning call instance codes for BICC signaling sessions without bilateral agreement between endpoints, wherein the BICC signaling router assigns an available call instance code associated with a destination BICC signaling node in response to receiving a BICC signaling message from an originating BICC signaling node, wherein the originating BICC signaling node is unaware of the call instance code associated with the destination BICC signaling node when sending the BICC signaling message; and
wherein, in response to receiving the BICC signaling message from the originating BICC signaling node, the routing module and the call instance code management module are configured to:
determine the destination BICC signaling node for the BICC signaling message;
select the available call instance code associated with the destination;
2. The system of claim 1 wherein each BICC signaling node associates a single call instance code with the BICC signaling router.
3. The system of claim 1 wherein each BICC signaling node associates all call instance codes with the BICC signaling router.
4. The system of claim 1 wherein the BICC signaling router is configured to store status information about the BICC signaling nodes and to use the status information in assigning the call instance codes for the signaling sessions.
5. The system of claim 1 wherein the BICC signaling router is configured to query one of: a number portability database, an advanced routing database, a short code database, voice mail service database, an IMS offload database, and a toll free database to obtain information usable to route messages associated with the signaling sessions.
6. The system of claim 1 wherein the BICC signaling router is configured to query one of: a prepaid services database and a prepaid zero balance screening database to determine whether to allow prepaid bearer communications associated with one of the signaling sessions to proceed.
7. The system of claim 1 wherein the BICC signaling router includes an interworking unit (IWU) for BICC-SIP interworking.
8. The system of claim 1 wherein the BICC signaling router is configured to generate and store call detail records (CDRs) associated with the signaling session.
9. The system of claim 1 wherein the BICC signaling router is configured to query one of a home location register (HLR) and a home subscriber server (HSS) using information in a received BICC signaling message to determine mobile subscription information for a called party associated with an associated signaling session.
10. The system of claim 1 wherein the BICC signaling router is configured to generate presence update messages using information from the BICC signaling messages.
11. A method for centralized routing and call instance code management in a bearer independent call control (BICC) network, the method comprising:
performing centralized routing of BICC signaling messages between BICC signaling nodes, wherein centralized routing of call instance codes includes assigning call instance codes for BICC signaling sessions without bilateral agreement between endpoints, wherein the BICC signaling router assigns an available call instance code associated with a destination BICC signaling node in response to receiving a BICC signaling message from an originating BICC signaling node, wherein the originating BICC signaling node is unaware of the call instance code associated with the destination BICC signaling node when sending the BICC signaling message;
performing centralized management of call instance codes for the BICC signaling sessions; and
wherein performing the centralized routing of BICC signaling messages and centralized management of call instance codes comprises:
determining the destination signaling node for the received BICC signaling message;
selecting the available call instance code associated with the destination;
12. The method of claim 11 comprising, from the BICC signaling router querying one of: a number portability database, an advanced routing database, a short code database, voice mail service database, an IMS offload database, and a toll free database to obtain information usable to route messages associated with the signaling sessions.
13. The method of claim 11 comprising, from the BICC signaling router, querying one of: a prepaid services database and a prepaid zero balance screening database to determine whether to allow prepaid bearer communications associated with one of the signaling sessions to proceed.
14. A non-transitory computer readable medium having stored thereon computer executable instructions that when executed by the processor of a computer perform steps comprising:
performing centralized routing of BICC signaling messages between BICC signaling nodes, wherein centralized routing of call instance codes includes assigning call instance codes for BICC signaling sessions without bilateral agreement between endpoints, wherein the BICC signaling router assigns an available call instance code associated with a destination BICC signaling node in response to receiving a BICC signaling message from an originating BIC signaling node, wherein the originating BICC signaling node is unaware of the call instance code associated with the destination BICC signaling node when sending the BICC signaling message;
15. The computer readable medium of claim 14 comprising, from the BICC signaling router querying one of: a number portability database, an advanced routing database, a short code database, voice mail service database, an IMS offload database, and a toll free database to obtain information usable to route messages associated with the signaling sessions.
16. The computer readable medium of claim 14 comprising, from the BICC signaling router, querying one of: a prepaid services database and a prepaid zero balance screening database to determine whether to allow prepaid bearer communications associated with one of the signaling sessions to proceed.
17. The computer readable medium of claim 14 comprising generating presence update messages using the information from the BICC signaling messages.
In the illustrated example, BSR 208 may modify call setup message 206 1 to include the new DPC and associated CIC and route modified call setup message 206 2 to SP B 202B. BSR 208 may remain in the call signaling path processing subsequent BICC signaling messages associated with the call to insure continuity using state mapping 214 or other information. For example, SP B 202B may generate and send an acknowledgement message 206 3 (e.g., BICC ISUP ACM) to BSR 208 after receiving message 206 2. BSR 208 may examine and process message 206 3 by replacing the DPC and associated CIC with the OPC and associated CIC of original call setup message 206 1. BSR 208 may route modified acknowledgement message 206 4 to SP A 202A.
The present subject matter may also present benefits with regard to BICC network management. It will be appreciated that since an originating SP may be unaware of where a call will terminate at the time the originating SP launches a call setup message 306 1 (because from the perspective of the originating SP, all call setup messages 306 are routed to BSR 208 and the selected CIC is associated with BSR 208), the originating SP does not have to have direct knowledge of the status of other SPs 202 in the network. As such, BSR 208 may be adapted to receive network management messages from SPs 202 and to respond appropriately to the network management messages. Network management messages may include any information about network 200 or signaling points 202 in network 200. Appropriate actions taken in response to network management messages may include making adjustments to routing table 318, updating network status information in status table 316 for the affected SP, sending a message to the originating node or other nodes (e.g., SPs and BSRs), and the like.
For example, BSR 208 may receive a call setup message 706 1 from originating SP A 202A. BSR 208 may access prepaid platform 728 determine that a called or calling party does not have sufficient prepaid credit for the requested call. BSR 208 may respond to the originating SP with an end or release message, thereby effectively blocking and preventing the call. Alternatively. BSR 208 may determine that there is sufficient prepaid credit for the requested call. If there is sufficient prepaid credit for the requested call. BSR 208 may modify and route call setup message 706 1 as appropriate. For example, BSR 208 may determine and select an appropriate SP (i.e., SP C 202C) and select an available CIC (i.e., 250) associated with SP C 202C for sending message 706 1. BSR 208 may record necessary state information, modify message 706 1 to include the selected CIC and point code of SP C 202C, and route modified message 706 2 to SP C 202C.
For example, an originating node SP A 202A may select an available CIC associated with BSR 208. A call setup message 1606 1 may be generated and sent to BSR 208. Call setup message 1606 1 may include a CIC, a CgPN identifier, and a CdPN identifier. BSR 208 may receive call setup message 1506 1 and examine the CIC value specified in message 1606 1. BSR 208 may determine, using the CgPN or CdPN, that message 1606 1 should be offloaded to an IMS network. BSR 208 may maintain information in IMS offload database 1546 used in making this determination. In the event that it is determined that the call should be offloaded to an IMS network, BSR 208 may terminate the call setup message 1606 1 (e.g., BICC ISUP IAM message) and generates a SIP INVITE message 1607 1 where SIP INVITE message 1607 1 is addressed to an SIP call session control function (CSCF) node 1652. BSR 208 may include or act as an IMS-interworking unit (I-IWU) 1650 as defined by ITU-T specification Q-1912.5. BSR 208 may specify a unique Dialog_ID and or Call_ID parameter value to be sent to CSCF 1652, and may map the originally specified CIC (e.g., 400) to the newly created Call_ID value. This CIC-Call_ID mapping, along with a source-destination node address mapping, may be maintained by BSR 208. Additional state information may also be maintained by BSR 208 related to the call or signaling session. CSCF node 1652 may send a response SIP message 1607 2 back using an available CIC associated with BSR 208. BSR 208 may use the recorded state information to modify response SIP message 1607 2 into message 1606 2 and route message 1606 2 to originating node SP A 202A.
FIG. 18 is a message flow chart illustrating BICC signaling using BSR 208 as illustrated in FIG. 16 for establishing a call with a SIP network, according to an embodiment of the subject matter described herein. As shown, BICC MGC 1800 is the originating signaling node of a call in this example, BSR 208 with SIP interworking functionality (BSR w/IWU) and SIP user agent server (UAS) 1820 is the terminating node. MGC 1800 sends a BICC IAM 1802 to BSR 208 for establishing a call. BSR 208 determines that message 1802 should be offloaded to a SIP network. BSR 208 terminates message 1802 and generates a SIP INVITE message 1814. BSR 208 sends message 1814 to SIP UAS 1820. SIP UAS 1820 sends a SIP 180 trying message 1816 back to BSR 208, indicating the called party is trying to be reached. SIP UAS 1820 sends a SIP 200 OK message 1816 back to BSR 208 when INVITE message 1814 is accepted. BSR 208 sends a BICC application transport message (APM) 1804 back to MGC 1800. Using the information communicated, a bearer connection is established between a media gateway (not shown) controlled by MGC 1800 and a SIP user agent client (not shown) associated with SIP UAS 1820. BSR 208 sends an address complete message (ACM) 1808 to MGC 1700 when the subscriber has been reached, indicating the phone is ringing. BSR 208 sends an answer message (ANM) 1810 to MGC 1800 when the called party answers the phone.
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International Classification H04Q3/00, H04L12/725, H04L12/701, H04L12/717
Cooperative Classification H04L45/304, H04L45/42, H04Q3/0045, H04L45/00, H04Q3/0025