CA2487700A1 - Provisioning of emergency services in a voice-over-packet environment - Google Patents

Provisioning of emergency services in a voice-over-packet environment Download PDF

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Publication number
CA2487700A1
CA2487700A1 CA002487700A CA2487700A CA2487700A1 CA 2487700 A1 CA2487700 A1 CA 2487700A1 CA 002487700 A CA002487700 A CA 002487700A CA 2487700 A CA2487700 A CA 2487700A CA 2487700 A1 CA2487700 A1 CA 2487700A1
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Canada
Prior art keywords
directory number
particular directory
emergency
determining
method defined
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Granted
Application number
CA002487700A
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French (fr)
Other versions
CA2487700C (en
Inventor
William Crago
Hakem M. Habib
Marie Berthe Barbara Wilkes
Bernard Brabant
Guy Caron
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BCE Inc
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BCE Inc
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Publication date
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Priority to PCT/CA2005/001459 priority Critical patent/WO2006039783A1/en
Publication of CA2487700A1 publication Critical patent/CA2487700A1/en
Application granted granted Critical
Publication of CA2487700C publication Critical patent/CA2487700C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/51—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
    • H04M3/5116—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing for emergency applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/128—Details of addressing, directories or routing tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H04L2012/6481—Speech, voice
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2242/00—Special services or facilities
    • H04M2242/14—Special services or facilities with services dependent on location

Abstract

The delivery of emergency services to users of a set of communication devices in a packet-switched network is enabled by a method that determines a routing key corresponding to a particular directory number that is associated with a particular communication device, and stores the directory number and the corresponding routing key in a database accessible to a packet switch. The steps of determining and storing are executed during a provisioning phase, in the absence of an emergency call placed by the communication device. The routing key is indicative of routing instructions to be followed by the packet switch upon receipt of a future emergency call placed by the communication device. When the call is received by the packet switch, it will consult the database to obtain the routing key associated with the directory number and send the call as well as the routing key over a path dedicated to emergency calls.

Claims (82)

1. A method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:

~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the corresponding routing key in a database accessible to a packet switch in the packet-switched network;

~ wherein the steps of determining and storing are executed in the absence of an emergency call placed by the particular communication device.
2. The method defined in claim 1, wherein the database is local to the packet switch.
3. The method defined in claim 1, wherein the database is within the packet switch.
4. The method defined in claim 1, wherein determining a routing key corresponding to the particular directory number comprises:

~ determining the identity of an emergency zone corresponding to the particular directory number;

~ determining the routing key corresponding to the particular directory number on the basis of the emergency zone corresponding to the particular directory number.
5. The method defined in claim 4, further comprising:

~ receiving a geographic location for the particular directory number;

~ validating the geographic location before determining the emergency zone corresponding to the particular directory number.
6. The method defined in claim 4, wherein determining the identity of an emergency zone corresponding to the particular directory number comprises:

~ receiving a geographic location for the particular directory number;

~ determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
7. The method defined in claim 6, further comprising validating the geographic location before determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
8. The method defined in claim 7, wherein the geographic location comprises a street address.
9. The method defined in claim 8, wherein validating the geographic location comprises providing the street address to a street address guide (SAG) and receiving from the SAG an indication of whether the geographic location is valid.
10. The method defined in claim 6, wherein the geographic location comprises a postal code or a zip code, and wherein determining the emergency zone corresponding to the particular directory on the basis of the received geographic location comprises consulting a table that maps postal codes or zip codes to emergency zones.
11. The method defined in claim 7, wherein determining the identity of an emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises providing the validated geographic location to a 1-1 database management system and receiving from the 9-1-1 database management system the identity of the emergency zone corresponding to the particular directory number.
12. The method defined in claim 11, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
13. The method defined in claim 7, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
14. The method defined in claim 13, wherein the step of updating the ALI
database is executed in the absence of an emergency call placed by the particular communication device.
15. The method defined in claim 1, wherein the packet switch is connected to a plurality of public safety answering points (PSAPs) via a dedicated emergency network, wherein the routing key corresponding to the particular directory number defines a route to a particular one of the PSAPs via the dedicated emergency network.
16. The method defined in claim 15, wherein the packet switch is connected to the dedicated emergency network via at least one switching entity that utilizes a respective forwarding table, the method further comprising:
~ determining a set of emergency telephone numbers corresponding to the particular directory number;
~ entering the set of emergency numbers into the forwarding table utilized by a switching entity that is connected to the PSAP reached via the route defined by the routing key corresponding to the particular directory number.
17. The method defined in claim 4, wherein determining a routing key corresponding to the particular directory number comprises consulting a call routing list which maps emergency zones to routing keys.
18. A computer readable storage medium containing a program element for execution by a computing device to implement a method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the corresponding routing key in a database accessible to a packet switch in the packet-switched network;

~ wherein the steps of determining and storing are executed in the absence of an emergency call placed by the particular communication device.
19. A method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the corresponding routing key in a database local to a packet switch in the packet-switched network.
20. The method defined in claim 19, performed at the packet switch.
21. The method defined in claim 19, performed at a registration entity outside the packet switch.
22. The method defined in claim 19, wherein the step of determining a routing key corresponding to the particular directory number is performed at the packet switch.
23. The method defined in claim 19, wherein determining a routing key corresponding to the particular directory number comprises:
~ determining the identity of an emergency zone corresponding to the particular directory number;
~ determining the routing key corresponding to the particular directory number on the basis of the emergency zone corresponding to the particular directory number.
24. The method defined in claim 23, wherein the step of determining the identity of an emergency zone corresponding to the particular directory number is performed at the packet switch.
25. The method defined in claim 24, wherein the step of determining the routing key corresponding to the particular directory number on the basis of the emergency zone corresponding to the particular directory number is performed at the packet switch.
26. The method defined in claim 23, wherein the step of determining the identity of an emergency zone corresponding to the particular directory number is performed at a registration entity outside the packet switch.
27. The method defined in claim 26, wherein the step of determining the routing key corresponding to the particular directory number on the basis of the emergency zone corresponding to the particular directory number is performed at the registration entity.
28. The method defined in claim 23, further comprising:
~ receiving a geographic location for the particular directory number;
~ validating the geographic location before determining the emergency zone corresponding to the particular directory number.
29. The method defined in claim 23, wherein determining the identity of an emergency zone corresponding to the particular directory number comprises:
~ receiving a geographic location for the particular directory number;
~ determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
30. The method defined in claim 29, further comprising validating the geographic location before determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
31. The method defined in claim 30, wherein the geographic location comprises a street address.
32. The method defined in claim 31, wherein validating the geographic location comprises providing the street address to a street address guide (SAG) and receiving from the SAG an indication of whether the geographic location is valid.
33. The method defined in claim 29, wherein the geographic location comprises a postal code or a zip code, and wherein determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises consulting a table that maps postal codes or zip codes to emergency zones.
34. The method defined in claim 30, wherein determining the identity of an emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises providing the validated geographic location to a 9-1-1 database management system and receiving from the 9-1-1 database management system the identity of the emergency zone corresponding to the particular directory number.
35. The method defined in claim 34, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
36. The method defined in claim 30, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
37. The method defined in claim 36, wherein the step of updating the ALI
database is executed in the absence of an emergency call placed by the particular communication device.
38. The method defined in claim 19, wherein the packet switch is connected to a plurality of public safety answering points (PSAPs) via a dedicated emergency network, wherein the routing key corresponding to the particular directory number defines a route to a particular one of the PSAPs via the dedicated emergency network.
39. The method defined in claim 38, wherein the packet switch is connected to the dedicated emergency network via at least one switching entity that utilizes a respective forwarding table, the method further comprising:
~ determining a set of emergency telephone numbers corresponding to the particular directory number;
~ entering the set of emergency numbers into the forwarding table utilized by a switching entity that is connected to the PSAP reached via the route defined by the routing key corresponding to the particular directory number.
40. The method defined in claim 23, wherein determining a routing key corresponding to the particular directory number comprises consulting a call routing list which maps emergency zones to routing keys.
41. A computer readable storage medium containing a program element for execution by a computing device to implement a method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining a routing key corresponding to the particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the corresponding routing key in a database local to a packet switch in the packet-switched network.
42. A method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining the identity of an emergency zone corresponding to a particular directory number that is associated with a particular communication device;
~ providing the particular directory number and the identity of the corresponding emergency zone to a packet switch in the packet-switched network;

~ at the packet switch, and on the basis of the identity of the corresponding emergency zone, determining a routing key corresponding to the particular directory number.
43. The method defined in claim 42, further comprising:
~ receiving a geographic location for the particular directory number;
~ validating the geographic location before determining the emergency zone corresponding to the particular directory number.
44. The method defined in claim 42, wherein determining the identity of an emergency zone corresponding to the particular directory number comprises:
~ receiving a geographic location for the particular directory number;
~ determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
45. The method defined in claim 44, further comprising validating the geographic location before determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
46. The method defined in claim 45, wherein the geographic location comprises a street address.
47. The method defined in claim 46, wherein validating the geographic location comprises providing the street address to a street address guide (SAG) and receiving from the SAG an indication of whether the geographic location is valid.
48. The method defined in claim 44, wherein the geographic location comprises a postal code or a zip code, and wherein determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises consulting a table that maps postal codes or zip codes to emergency zones.
49. The method defined in claim 45, wherein determining the identity of an emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises providing the validated geographic location to a 9-1-1 database management system and receiving from the 9-1-1 database management system the identity of the emergency zone corresponding to the particular directory number.
50. The method defined in claim 49, further comprising updating an automatic location identification (ALI) database with the directory number associated with the particular communication device and with the validated geographic location for the particular directory number.
51. The method defined in claim 45, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
52. The method defined in claim 51, wherein the step of updating the ALI
database is executed in the absence of an emergency call placed by the particular communication device.
53. The method defined in claim 42, wherein the packet switch is connected to a plurality of public safety answering points (PSAPs) via a dedicated emergency network, wherein the routing key corresponding to the particular directory number defines a route to a particular one of the PSAPs via the dedicated emergency network.
54. The method defined in claim 53, wherein the packet switch is connected to the dedicated emergency network via at least one switching entity that utilizes a respective forwarding table, the method further comprising:
~ determining a set of emergency telephone numbers corresponding to the particular directory;
~ entering the set of emergency numbers into the forwarding table utilized by a switching entity that is connected to the PSAP reached via the route defined by the routing key corresponding to the particular directory number.
55. The method defined in claim 42, wherein determining a routing key corresponding to the particular directory number comprises consulting a call routing list which maps emergency zones to routing keys.
56. The method defined in claim 42, further comprising storing the particular directory number and the corresponding routing key in a memory local to the packet switch.
57. The method defined in claim 42, further comprising storing the particular directory number and the corresponding routing key in a memory within the packet switch.
58. A computer readable storage medium containing a program element for execution by a computing device to implement a method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining the identity of an emergency zone corresponding to a particular directory number that is associated with a particular communication device;
~ providing the particular directory number and the identity of the corresponding emergency zone to a packet switch in the packet-switched network;
~ at the packet switch, and on the basis of the identity of the corresponding emergency zone, determining a routing key corresponding to the particular directory number.
59. A method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the routing key corresponding to the particular directory number in a database accessible to a packet switch in the packet-switched network;

~ wherein the routing key corresponding to the particular directory number is indicative of routing instructions to be followed by the packet switch upon receipt of a future emergency call placed by the particular communication device.
60. The method defined in claim 59, the routing instructions being first routing instructions, wherein the packet switch is connected to a plurality of public safety answering points (PSAPs) via a dedicated emergency network, wherein the routing key corresponding to the particular directory number is further indicative of second routing instructions to be followed by entities in the dedicated emergency network upon receipt of a future emergency call placed by the particular communication device.
61. The method defined in claim 59, wherein determining a routing key corresponding to the particular directory number comprises:
~ determining the identity of an emergency zone corresponding to the particular directory number;
~ determining the routing key corresponding to the particular directory number on the basis of the emergency zone corresponding to the particular directory number.
62. The method defined in claim 60, further comprising:
receiving a geographic location for the particular directory number;
~ validating the geographic location before determining the emergency zone corresponding to the particular directory number.
63. The method defined in claim 60, wherein determining the identity of an emergency zone corresponding to the particular directory number comprises:
~ receiving a geographic location for the particular directory number;
~ determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
64. The method defined in claim 63, further comprising validating the geographic location before determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location.
65. The method defined in claim 64, wherein the geographic location comprises a street address.
66. The method defined in claim 65, wherein validating the geographic location comprises providing the street address to a street address guide (SAG) and receiving from the SAG an indication of whether the geographic location is valid.
67. The method defined in claim 63, wherein the geographic location comprises a postal code or a zip code, and wherein determining the emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises consulting a table that maps postal codes or zip codes to emergency zones.
68. The method defined in claim 64, wherein determining the identity of an emergency zone corresponding to the particular directory number on the basis of the received geographic location comprises providing the validated geographic location to a 9-1-1 database management system and receiving from the 9-1-1 database management system the identity of the emergency zone corresponding to the particular directory number.
69. The method defined in claim 68, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
70. The method defined in claim 64, further comprising updating an automatic location identification (ALI) database with the particular directory number and with the validated geographic location for the particular directory number.
71. The method defined in claim 70, wherein the step of updating the ALI
database is executed in the absence of an emergency call placed by the particular communication device.
72. The method defined in claim 59, wherein the packet switch is connected to the dedicated emergency network via at least one switching entity that utilizes a respective forwarding table, the method further comprising:
~ determining a set of emergency telephone numbers corresponding to the particular directory number;
~ entering the set of emergency numbers into the forwarding table utilized by a switching entity that is connected to the PSAP reached via the route defined by the muting key corresponding to the particular directory number.
73. The method defined in claim 72, the routing instructions being first routing instructions, wherein the routing key corresponding to the particular directory number is further indicative of second routing instructions to be followed by the a switching entity that is connected to the PSAP reached via the route defined by the routing key corresponding to the particular directory number.
74. The method defined in claim 60, wherein determining a routing key corresponding to the particular directory number comprises consulting a call routing list which maps emergency zones to routing keys.
75. A computer readable storage medium containing a program element for execution by a computing device to implement a method of enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the method comprising:-~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the routing key corresponding to the particular directory number in a database accessible to a packet switch in the packet-switched network;

~ wherein the routing key corresponding to the particular directory number is indicative of routing instructions to be followed by the packet switch upon receipt of a future emergency call placed by the particular communication device.
76. A registration entity for enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the registration entity comprising:
~ a control entity;
~ an I/O for communicating with a packet switch in the packet-switched network;
~ the control entity being operative to execute the steps of:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the routing key corresponding to the particular directory number in a database accessible to the packet switch;
~ the steps of determining and storing being executed for the particular communication device in the absence of an emergency call placed by the particular communication device.
77. A network entity for enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the network entity comprising:
~ a control entity;
~ an I/O in communication with the control entity;
~ the control entity being operative to execute the steps of:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the corresponding routing key in a database local to a packet switch in the packet-switched network.
78. The network entity of claim 77 being a registration entity.
79. The network entity of claim 77 being a packet switch.
80. A packet switch for enabling the delivery of emergency services to users of a set of communication devices in a packet-switched network, each of the communication devices being associated with a respective directory number, the packet switch comprising:
~ a control entity;
~ an I/O in communication with the control entity;
~ the control entity being operative to execute the steps of:
~ determining a routing key corresponding to a particular directory number that is associated with a particular communication device; and ~ storing the particular directory number and the routing key corresponding to the particular directory number in a database;
~ wherein the routing key corresponding to the particular directory number is indicative of routing instructions to be followed by the packet switch upon receipt of a future emergency call placed by the particular communication device.
81. A computer-readable storage medium for storing data for access by an application program being executed at a packet switch in a packet-switched network, the memory comprising:
~ a plurality of records, each record identifying:
~ a directory number associated with a respective communication device in the packet-switched network; and ~ a routing key corresponding to the directory number;
~ wherein the routing key corresponding to a particular directory number is indicative of routing instructions to be followed by the packet switch upon receipt of a future emergency call placed by the communication device associated with the particular directory number.
82. The computer-readable storage medium defined in claim 81, each record further identifying an emergency zone corresponding to the particular directory number.
CA2487700A 2004-10-13 2004-11-12 Provisioning of emergency services in a voice-over-packet environment Active CA2487700C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CA2005/001459 WO2006039783A1 (en) 2004-10-13 2005-09-23 Emergency services provisioning and emergency call handling in a voice-over-packet environment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61765604P 2004-10-13 2004-10-13
US60/617,656 2004-10-13

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CA2487700C CA2487700C (en) 2010-03-16

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US7801282B2 (en) 2010-09-21
US20060077961A1 (en) 2006-04-13
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US7079627B2 (en) 2006-07-18
US7953209B2 (en) 2011-05-31
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US20060078095A1 (en) 2006-04-13
US20060229059A1 (en) 2006-10-12

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