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EP1093312A2
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Correlation of signalling messages
Assignee: Agilent Technologies Inc
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Filing: 2000-09-22
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Granted: —
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Expires: 2020-09-22
Abstract
Abstract Signalling messages conforming to different signalling protocols in a distributed switch telecommunications network are correlated by associating specific pairs of messages according to parameters they have in common. Inter-MGC IAMs and SS7 IAMs are correlated by the combination of Calling & Called address parameters; the connection descriptor parameter included in inter-MGC IAMs and MGCP OK messages can be used to correlate these messages; and the MGCP OK message can be correlated with the MGCP CRCX message using the transaction ID. Hence a correspondence can be deduced between an MGCP endpointname (in the CRCX message) and an ISUP OPC-DPC-CIC identification (in the SS7 IAM).
Inventors
- 👤 David Moir Archibald
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 14:37
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/41; H04M15/49; H04Q; H04Q3/00; H04Q3/0016; H04Q3/0025; H04M2215/00; H04M2215/01; H04M2215/0164; H04M2215/46
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
A method of establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising the
steps of: monitoring messages traversing at least first and second signalling channels which
conform to respective first and second signalling protocols; selecting first messages containing an identification related to an end user of said
bearer data item and a first identification of a bearer channel carrying said bearer data item; selecting second messages containing a second identification of a bearer channel
carrying said bearer data item and a call identifier with system-wide significance; selecting third messages containing an identification related to an end user of said
data item and a call identifier with system-wide significance; and using said selected third messages to establish a correlation between the first and
second bearer channel identifications.
Claim 2
Independent Claim
148 words
A method of establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising the
steps of: monitoring messages traversing at least first and second signalling channels which
conform to respective first and second signalling protocols; selecting first messages containing an identification related to an end user of said
bearer data item and a first identification of a bearer channel carrying said bearer data item; selecting second messages containing a second identification of a bearer channel
carrying said bearer data item and a transaction identifier; selecting third messages containing an identification related to an end user of said
data item and packet network address information; selecting fourth messages containing packet network address information and a
transaction identifier; and using said selected third and fourth messages to establish a correlation between the
first and second bearer channel identifications.
Claim 3
Dependent Claim
15 words
The method of claim 2, wherein the fourth messages comprise responses to said
second messages.
Claim 4
Independent Claim
39 words
The method of any one of the preceding claims, wherein the first messages are SS7
ISUP Initial Address Messages, the end user identification comprises calling and called party
addresses, and the first bearer channel identification comprises an OPC-DPC-CIC
combination.
Claim 5
Independent Claim
28 words
The method of any one of the preceding claims, wherein the second messages are
MGCP Create Connection messages and the second bearer channel identification comprises
endpoint identifier parameters.
Claim 6
Independent Claim
29 words
The method of any one of the preceding claims, wherein the third messages are ISUP
Initial Address Messages and the end user identification comprises calling and called party
addresses.
Claim 7
Dependent Claim
32 words
The method of claim 2, wherein the fourth messages are MGCP Response messages,
the packet network address information comprises an SDP connection descriptor parameter,
and the transaction identifiers comprise transaction ID parameters.
Claim 8
Independent Claim
123 words
A method of establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising the
steps of: monitoring messages traversing at least first and second signalling channels which
conform to respective first and second signalling protocols; selecting first call initiation messages containing a first identification of a bearer
channel carrying said bearer data item; selecting second call initiation messages containing a second identification of a bearer
channel carrying said bearer data item; determining elapsed time between occurrence of said first and second messages; and establishing a correlation between first and second messages for which the elapsed
time is below a predetermined threshold, and thus between the first and second bearer
channel identifications.
Claim 9
Dependent Claim
29 words
The method of claim 8, wherein establishment of a correlation between first and
second messages is also dependent upon absence of any similar messages within a
predetermined time interval.
Claim 10
Dependent Claim
35 words
The method of claim 8, wherein the first messages are SS7 ISUP Initial Address
Messages, the end user identification comprises calling and called party addresses, and the
first bearer channel identification comprises an OPC-DPC-CIC combination.
Claim 11
Dependent Claim
24 words
The method of claim 8, wherein the second messages are MGCP Create Connection
messages and the second bearer channel identification comprises endpoint identifier
parameters.
Claim 12
Dependent Claim
154 words
Apparatus for establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising: monitoring equipment for monitoring messages traversing at least first and second
signalling channels which conform to respective first and second signalling protocols; a first selector for selecting first messages containing an identification related to an
end user of said bearer data item and a first identification of a bearer channel carrying said
bearer data item; a second selector for selecting second messages containing a second identification of
a bearer channel carrying said bearer data item and a call identifier with system-wide
significance; a third selector for selecting third messages containing an identification related to an
end user of said data item and a call identifier with system-wide significance; and a correlator for establishing a correlation between the first and second bearer channel
identifications in accordance with said selected third messages.
Claim 13
Dependent Claim
167 words
Apparatus for establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising: monitoring equipment for monitoring messages traversing at least first and second
signalling channels which conform to respective first and second signalling protocols; a first selector for selecting first messages containing an identification related to an
end user of said bearer data item and a first identification of a bearer channel carrying said
bearer data item; a second selector for selecting second messages containing a second identification of
a bearer channel carrying said bearer data item and a transaction identifier; a third selector for selecting third messages containing an identification related to an
end user of said data item and packet network address information; a fourth selector for selecting fourth messages containing packet network address
information and a transaction identifier; and a correlator for establishing a correlation between the first and second bearer channel
identifications in accordance with said selected third and fourth messages.
Claim 14
Dependent Claim
136 words
Apparatus for establishing a correlation between the contents of signalling messages
conforming to different protocols but relating to a common bearer data item, comprising: a monitor for monitoring messages traversing at least first and second signalling
channels which conform to respective first and second signalling protocols; a first selector for selecting first call initiation messages containing a first
identification of a bearer channel carrying said bearer data item; a second selector for selecting second call initiation messages containing a second
identification of a bearer channel carrying said bearer data item; a monitor for determining elapsed time between occurrence of said first and second
messages; and a correlator for establishing a correlation between first and second messages for which
the elapsed time is below a predetermined threshold, and thus between the first and second
bearer channel identifications.
References Cited (Backward Citations)
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