US5828729A
Expired / Lapsed
US
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Automated mass calling detection using CCS7 message parameters
Assignee: Stentor Resource Centre Inc
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Filing: 1995-11-22
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Granted: 1998-10-27
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Expires: 2015-11-22
Abstract
Abstract In a telephone network having a number of telephone switching offices which have CCS7 signalling capabilities and wherein each switching office is linked to STPs (Signalling Transfer Points), or other switching offices with CCS7 signalling links, a method of detecting mass calling events using CCS7 signalling data is disclosed. Each signalling link connecting a switch is monitored. For each call, an Initial Address Message sent from an originating switch to a terminating switch is identified. The IAM is then temporarily stored in storage means. When the occurrence of a release message indicative of an unsuccessful call attempt is detected, an identification of which of the stored IAMs corresponds to the release message is made. A count is computed for each directory (DN) having an IAM with a corresponding release message indicative of an unsuccessful call attempt such that mass calling events directed to a directory number can be detected.
Inventors
- 👤 Normand A. Clermont
- 👤 Maurice E. Lavigne
- 👤 Gerald W. Fikis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016; H04Q3/0025
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
149 words
In a telephone network having a number of telephone switching offices which have CCS7 signalling capabilities and wherein each switching office is linked to STPs (Signalling Transfer Points), or other switching offices with CCS7 signalling links, a method of detecting mass calling events using CCS7 signalling data, comprising: monitoring each signalling link connected to a switch; identifying for each call attempt, an Initial Address Message (IAM) sent from an originating switch for the call attempt to a terminating switch; determining the Directory Number (DN) dialled by examining the dialled number in the IAM; and for a predetermined time interval, maintaining a count of call attempts for each to determine an order of magnitude of call flow towards specific DNs in order to detect an excessive number of call attempts to a specific and alerting network administration when an excessive number of call attempts to a specific DN is detected.
Claim 2
Dependent Claim
149 words
In a telephone network having a number of telephone switching offices which have CCS7 signalling capabilities and wherein each switching office is linked to STPs (Signalling Transfer Points), or other switching offices with CCS7 signalling links, a method of detecting mass calling events using CCS7 signalling data, comprising: monitoring each signalling link connected to a switch; identifying for each call attempt, an Initial Address Message (IAM) sent from an originating switch for the call attempt to a terminating switch; determining the Directory Number (DN) dialled by examining the dialled number in the IAM; and for a predetermined time interval, maintaining a count of call attempts for each to determine an order of magnitude of call flow towards specific DNs in order to detect an excessive number of call attempts to a specific and alerting network administration when an excessive number of call attempts to a specific DN is detected.
Claim 3
Dependent Claim
141 words
In a telephone network having a number of telephone switching offices which have CCS7 signalling capabilities and wherein each switching office is linked to STPs (Signalling Transfer Points), or other switching offices with CCS7 signalling links, a method of detecting mass calling events using CCS7 signalling data, comprising the steps of: monitoring each signalling link connecting a switch; identifying for each call, an Initial Address Message sent from an originating switch to a terminating switch; temporarily storing said IAM in storage means; detecting the occurrence of a release message indicative of an unsuccessful call attempt; identifying which of the stored IAMs corresponds to the release message; and computing a count for each directory (DN) having an IAM with a corresponding release message indicative of an unsuccessful call attempt such that mass calling events directed to a directory number can be detected.
Claim 4
Dependent Claim
141 words
In a telephone network having a number of telephone switching offices which have CCS7 signalling capabilities and wherein each switching office is linked to STPs (Signalling Transfer Points), or other switching offices with CCS7 signalling links, a method of detecting mass calling events using CCS7 signalling data, comprising the steps of: monitoring each signalling link connecting a switch; identifying for each call, an Initial Address Message sent from an originating switch to a terminating switch; temporarily storing said IAM in storage means; detecting the occurrence of a release message indicative of an unsuccessful call attempt; identifying which of the stored IAMs corresponds to the release message; and computing a count for each directory (DN) having an IAM with a corresponding release message indicative of an unsuccessful call attempt such that mass calling events directed to a directory number can be detected.
Claim 5
Dependent Claim
45 words
A method as defined in claim 2, wherein a release message sent from the terminating switch is correlated to correspond to an initial address message sent from the originating switch, by comparing key parameters common to both the Release Message and the Initial Address Message.
Claim 6
Dependent Claim
22 words
A method as defined in claim 3 wherein said key parameters comprise a common Circuit Identification Code (CIC) and signalling point codes.
Claim 7
Dependent Claim
43 words
A method as defined in claim 3, wherein each Release Message and Initial Address Message are monitored using CCS7 links to switches, such that the Initial Address Message and Release Messages can be correlated when each message is transmitted on diverse signalling links.
Claim 8
Dependent Claim
16 words
A method as defined in claim 5, wherein signalling links are monitored at the originating switch.
Claim 9
Dependent Claim
17 words
A method as defined in claim 5, wherein said signalling links are monitored at the terminating switch.
Claim 10
Dependent Claim
26 words
A method as defined in claim 5, wherein said signalling links are monitored at each switch to detect unsuccessful call attempts generated by each individual switch.
Claim 11
Dependent Claim
47 words
A method as defined in claim 8, wherein monitoring devices on each link are connected to a central controller to consolidate on a network-wide basis, counts of unsuccessful attempts per dialled number, and to detect mass calling events caused by the dialing of translated and non-translated numbers.
Claim 12
Dependent Claim
40 words
A method as defined in claim 7, wherein said links are monitored for CCS7 messages carrying database queries and responses to enable reverse translations of a translated routable Directory Number to an originally dialled number sent from the originating switch.
Claim 13
Dependent Claim
47 words
A method as defined in claim 10, wherein said reverse translation can be enabled by intercepting and correlating a database response containing a routing number corresponding to a mass called Directory Number, with a database query having a corresponding transaction ID and containing said originally dialled number.
Claim 14
Dependent Claim
26 words
A method as defined in claim 1, wherein said signalling links between said originating switch and said terminating switch are routed via STPs (Signalling Transfer Points).
Claim 15
Dependent Claim
16 words
A method as defined in claim 12, wherein each signalling link is monitored at the STPs.
Claim 16
Dependent Claim
26 words
A method as defined in claim 2, wherein said signalling links between said originating switch and said terminating switch are routed via STPs (Signalling Transfer Points).
Claim 17
Dependent Claim
16 words
A method as defined in claim 14, wherein each signalling link is monitored at the STPs.
Claim 18
Dependent Claim
20 words
A method as defined in claim 1, wherein direct signalling links are provided between the originating and the terminating switches.
Claim 19
Dependent Claim
20 words
A method as defined in claim 2, wherein direct signalling links are provided between the originating and the terminating switches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-26 | 2002-04-27 | 2002-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-26 | 2006-04-27 | 2006-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-26 | 2010-04-27 | 2010-10-27 | $7700.00 | Window Closed / Lapsed |