Telecommunications network traffic management system

• US 5,459,777 A
• Filed: 02/23/1994
• Issued: 10/17/1995
• Est. Priority Date: 10/28/1993
• Status: Expired due to Fees

• Current Assignee: British Telecommunications PLC (BT Group PLC)
• Original Assignee: British Telecommunications PLC (BT Group PLC)
• Inventors: Bassa, Paul A., Isaac, Joseph J.
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US08/200,326
• Time in Patent Office: 601 Days
• Field of Search: 379/9, 379/10, 379/14, 379/32, 379/33, 379/133, 379/134, 379/136, 370/13, 370/16
• US Class Current: 379/133
• CPC Class Codes: H04Q 2213/13521 fault management
• CPC Class Codes: H04Q 2213/13522 traffic management
• CPC Class Codes: H04Q 3/0075 Fault management techniques
• CPC Class Codes: H04Q 3/66 Traffic distributors

Abstract

An international telecommunications network includes a set of international exchanges located in a particular country which connect a national telecommunications network situated in that country with networks situated in other countries. The international network includes a traffic management system having an expert system with a set of knowledge sources. An identifier identifies alarms relating to traffic and a prioritizer arranges the alarms in order of priority. A diagnoser diagnoses the cause or causes of the alarms by proposing suspected causes and investigating them in relation to traffic and network data. A resolver proposes remedies for the causes of the alarms by reasoning over each cause in relation to data on traffic associated with the cause, reasoning over each remedy in relation to data on traffic in the neighborhood of the remedy to determine a figure of merit for the remedy, and then arranging the remedies in order of merit. Remedies may be implemented automatically or under the control of an operator.

Claims

1. A telecommunications system including a plurality of exchanges, a set of routes for carrying telecommunications traffic between said exchanges, and a traffic management system, said traffic management system comprising:

means for receiving traffic data from said exchanges;

means for identifying alarms from said traffic data;

means for proposing at least one suspected cause for said alarms;

means for investigating said at least one suspected cause in relation to said traffic data; and

means for proposing at least one remedy for each said at least one suspected cause,

a set of routes for carrying telecommunications traffic between a telecommunications network, hereinafter referred to as the first telecommunications network, and a second telecommunications network,

wherein if there is an answer seizure ratio alarm on a route from an exchange in the first telecommunications network to an exchange in the second telecommunications network and also a percentage overflow alarm on a set of routes from said exchange in the first telecommunications network to said exchange in the second telecommunications network, then;

said means for proposing at least one suspected cause includes means which proposes mass calling to said exchange in the second telecommunications network as a suspected cause of said alarms,

said means for investigating includes means which investigates whether mass calling has been proposed as a suspected cause from only one or more than one exchange in the first telecommunications network to said exchange in the second telecommunications network, and

said means for proposing at least one remedy includes means which (a) proposes using alternative routes to the exchange in the second telecommunications network in the event that mass calling has been proposed as a suspected cause from only one exchange in the first telecommunications network, and (b) proposes call gapping to said exchange in the second telecommunications network in the event that mass calling has been proposed as a suspected cause from more than one exchange in the first telecommunications network.

2. A telecommunications network including a plurality of exchanges, a set of routes for carrying telecommunications traffic between said exchanges, said exchanges including at least one exchange for transmitting telecommunications traffic over a plurality of routes to exchanges in other telecommunications networks, and a traffic management system for managing traffic between said telecommunications network and other telecommunications networks, said traffic management system comprising:

means for receiving said traffic data from said at least one exchange for transmitting telecommunications traffic to exchanges in said other telecommunications networks, said traffic data relating to traffic between said telecommunications network and said other telecommunications networks;

means for identifying alarms from said traffic data, said identifying means comparing traffic parameter values derived from said traffic data with threshold values and identifying an alarm when one of said traffic parameter values is on the alarm side of a threshold value;

means for diagnosing at least one suspected cause for said alarms by applying predetermined cause selection rules to said alarms;

means for investigating said at least one suspected cause in relation to said traffic data by applying predetermined investigation rules to said at least one suspected cause; and

means for proposing at least one remedy for said at least one suspected cause by applying remedy selection rules to said at least one suspected cause and the results of the investigation performed by said investigating means.

3. A telecommunications network as in claim 2 in which said at least one exchange for transmitting telecommunications traffic over a plurality of routes to exchanges in other telecommunications networks comprise at least two exchanges for transmitting telecommunications traffic over a plurality of routes to exchanges in said other telecommunications networks, and in which, when there is a seizure ratio alarm on a route from one of said at least two exchanges to a destination exchange in one of said other telecommunications networks and also a percentage overflow alarm on a set of routes from said one exchange to said destination exchange,

said means for diagnosing at least one suspected cause includes means which proposes mass calling to said destination exchange as a suspected cause of said alarms,

said investigating means includes means which investigates whether mass calling has been proposed as a suspected cause from only said one exchange or from said one exchange and another one of said at least two exchanges to said destination exchange, and

said means for proposing at least one remedy includes means which (a) proposes using at least one alternative route to said destination exchange in the event that mass calling has been proposed as a suspected cause from only said one exchange, and (b) proposes call gapping to said destination exchange in the event that mass calling to said destination exchange has been proposed as the suspected cause from said one exchange and another one of said at least two exchanges to said destination exchange.

4. A method of automatically managing a telecommunications network including a plurality of exchanges, a set of routes for carrying telecommunications traffic between said exchanges, and a traffic management system, said method comprising the following steps carried out by an automated digital signal processing subsystem:

receiving traffic data from said exchanges;

identifying alarms from said traffic data;

proposing at least one suspected cause for said alarms;

investigating said at least one cause in relation to said traffic data; and

proposing at least one remedy for each said at least one suspected cause,

wherein a set of routes are provided for carrying telecommunications traffic between said telecommunications network, hereinafter referred to as the first telecommunications network, and a second telecommunications network,

wherein if there is an answer seizure ratio alarm on a route from an exchange in the first telecommunications network, to an exchange in the second telecommunications network and also a percentage overflow alarm on a set of routes from said exchange in the first telecommunications network to said exchange in the second telecommunications network, then;

proposing mass calling to said exchange in the second telecommunications network as a suspected cause of said alarms;

investigating whether mass calling has been proposed as a suspected cause form only one or more than one exchange in the first telecommunications network to said exchange in the second telecommunications network, and

proposing at least one remedy proposes using alternative routes to the exchange in the second telecommunications network in the even that mass calling has been proposed as a suspected cause from only one exchange in the first telecommunications network, and proposing call gapping to said exchange in the second network in the event that mass calling has been proposed as a suspected cause from more than one exchange in the first telecommunications network.

5. A method for automatically managing a telecommunications network including a plurality of exchanges, a set of routes for carrying telecommunications traffic between said exchanges, said exchanges including at least one exchange for transmitting telecommunications traffic over a plurality of routes to exchanges in other telecommunications networks, and a traffic management system for managing traffic between said telecommunications network and other telecommunications networks, said method comprising the following steps carried out by an automated digital signal processing subsystem:

receiving traffic data from said at least one exchange for transmitting telecommunications traffic to exchanges in said other telecommunications networks, said traffic data relating to traffic between said telecommunications network and said other telecommunications networks,

identifying alarms from said traffic data, comparing traffic parameter values derived from said traffic data with threshold values and identifying an alarm when one of said traffic parameter values is on the alarm side of a threshold value;

diagnosing at least one suspected cause for said alarms by applying predetermined cause selection rules to said alarms;

investigating said at least one suspected cause in relation to said traffic data by applying predetermined investigation rules to said at least one suspected cause; and

proposing at least one remedy for said at least one suspected cause by applying remedy selection rules to said at least one suspected cause and the results of said investigating step.

6. A method as in claim 5 in which said at least one exchange for transmitting telecommunications traffic over a plurality of routes to exchanges in other telecommunications networks includes at least two exchanges for transmitting telecommunications traffic over a plurality of routes to exchanges in said other telecommunications networks, and in which, when there is a seizure ratio alarm on a route from one of said at least two exchanges to a destination exchange in one of said other telecommunications networks and also a percentage overflow alarm on a set of routes from said one exchange to said destination exchange,

said diagnosing step proposes mass calling to said destination exchange as a suspected cause of said alarms,

said investigating step investigates whether mass calling has been proposed as a suspected cause from only said one exchange or from said one exchange and another one of said at least two exchanges to said destination exchange, and

said proposing step proposes (a) using at least one alternative route to said destination exchange in the event that mass calling has been proposed as a suspected cause from only said one exchange, and (b) call gapping to said destination exchange in the event that mass calling to said destination exchange has been proposed as the suspected cause from said one exchange and another one of said at least two exchanges to said destination exchange.