Method for flexible formatting of call detail records and switching system incorporating same

• US 6,052,448 A
• Filed: 12/23/1997
• Issued: 04/18/2000
• Est. Priority Date: 12/23/1997
• Status: Expired due to Fees

• Current Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Janning, William J.
• Primary Examiner(s): Loomis, Paul
• Assistant Examiner(s): TIEU, BINH KIEN
• Application Number:
  US08/996,886
• Time in Patent Office: 847 Days
• Field of Search: 379/111, 379/112, 379/114, 379/115, 379/116, 379/119, 379/121, 379/144, 379/120, 379/126, 379/127, 379/133, 379/134, 379/113
• US Class Current: 379/115.01
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/41 Billing record details, i.e. parameters, identifiers, structure of call data record [CDR]
• CPC Class Codes: H04M 15/43 Billing software details
• CPC Class Codes: H04M 15/70 Administration or customization aspects; Counter-checking correct charges

Abstract

A method for formatting CDRs to reduce storage and processing requirements within a switch or telecommunications network which formats CDRs in accordance with the disclosed techniques. A switch includes a call condense agent for collecting raw call information for calls handled thereby and a formatting agent for selecting, based upon an examination of said raw call information, an optimal data structure for formatting the raw call information and for producing a CDR by formatting said raw call information in accordance with said optimal data structure. The optimal data structure is that which best fits the raw call information. The best fitting data structure is chosen by determining, for each template, which call detail types are classified as "must-have" or "don'"'"'t care" and selecting the template which includes all of the must-have call details and the greatest number of "don'"'"'t care" call details captured by the raw call information and the least amount of store for call detail types which were not captured by the raw call information. The switch also includes a storage facility, coupled to the call condense and formatting agents, for maintaining the raw call information, a plurality of data structures and the CDRs therein. If the method is performed within a telecommunications network, the formatter and storage facility will reside within a billing server coupled to the switch.

Claims

1. A switch for a telecommunications network, said switch comprising:

a call condense agent, said call condense agent collecting raw call information for calls handled by said switch, said raw call information for a first one of said calls containing data for at least one of a plurality of data types;

a formatting agent;

a storage facility coupled to said formatting agent, said storage facility maintaining a plurality of data structures, each one of said plurality of data structures containing a respective subset of said plurality of data types;

said formatting agent selecting, based upon an examination of (1) said raw call information for said first one of said calls, (2) said plurality of data structures and (3) a call detail type attribute map which describes an attribute of each one of said plurality of data types, an optimal one of said plurality of data structures for formatting said raw call information for said first one of said calls and producing a call detail record by formatting said raw call information for said first one of said calls in accordance with said optimal data structure;

for each one of said plurality of CDR templates, said formatter comparing said raw call information for said first one of said calls to said call detail type attribute map and said CDR template and, based on said comparison, for each one of said plurality of data structures, of said raw call information for said first one of said calls to said call detail type attribute map and said CDR template, selecting one of said plurality of data structures as said optimal data structure for said first one of said calls.

2. The switch of claim 1 wherein:

said storage facility is also coupled to said call condense agent, said storage facility including a first portion where said raw call information for said first one of said calls is maintained.

3. The switch of claim 1 wherein:

said storage facility is also coupled to said call condense agent, said storage facility including a first portion where said raw call information for said first one of said calls is maintained, a second portion where said plurality of data structures are maintained and a third portion where said call detail record for said first one of said calls is maintained.

4. The switch of claim 1 wherein:

said storage facility is also coupled to said call condense agent, said storage facility including a first portion where said raw call information for said first one of said calls is maintained and a second portion where said plurality of data structures are maintained.

5. A telecommunications network, comprising:

an IXC switch for handling calls, said IXC switch including a first agent for collecting raw information for said calls handled by said IXC switch, said raw information for a first one of said calls containing data for at least one of a plurality of data types; and

a billing server, coupled to said IXC switch;

a storage facility coupled to said billing server, said storage facility maintaining a plurality of data structures and a call detail type attribute map, each one of said plurality of data structures containing a respective subset of said plurality of data types and said call detail type attribute map describing an attribute of each one of said types of call details;

said billing server including a second agent for formatting said raw information collected by said first agent for said first one of said calls into a selected one of said plurality of data structures, said selected one of said plurality of data structures selected by said second agent based upon an examination, for each one of said plurality of CDR templates, of (1) said raw information for said first one of said calls, (2) said call detail type attribute map and (3) said plurality of data structures;

said second agent comparing, for each one of said plurality of data structures, said raw call information for said first one of said calls to said call detail type attribute map and said CDR template and, based on said comparison, for each one of said plurality of data structures, of said raw call information to said call detail type attribute map and said CDR template, selecting one of said plurality of data structures for formatting said raw information for said first one of said calls.

6. A method of selectively formatting call detail information acquired during a call, comprising the steps of:

providing a plurality of call detail record (CDR) templates, each defining a respective data structure and comprised of a selected subset of a set of types of call details;

providing a call detail type attribute map, said call detail type attribute map describing an attribute of each one of said types of call details;

examining call detail information acquired during a call;

examining each one of said plurality of CDR templates;

selecting, from said plurality of CDR templates, a CDR template based upon said examination of (1) said call detail information acquired during said call, (2) said plurality of CDR templates and (3) said call detail type attribute map; and

formatting said call detail information acquired during said call in accordance with said data structure defined by said selected CDR template;

wherein the step of selecting, from said plurality of CDR templates, a CDR template based upon said examination of (1) said call detail information acquired during said call, (2) said plurality of CDR templates and (3) said call detail type attribute map further comprises the steps of;

for each one of said plurality of CDR templates, comparing said call detail information for said call to said call detail type attribute map and to said CDR template; and

based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template, selecting one of said plurality of CDR templates for use in formatting said call detail information for said call.

7. The method of claim 6 wherein the step of selecting one of said plurality of CDR templates for use in formatting said call detail information for said call based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail attribute map and said CDR template further comprises the step of:

selecting, based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template, said CDR template which best fits said call detail information for said call.

8. The method of claim 6 wherein said call detail information for said call is comprised of a plurality of call details, each of a different type, and each one of said plurality of CDR templates defines a plurality of call detail types and wherein the step of comparing each of said plurality of CDR templates to said call detail information for said call further comprises the step of:

classifying each one of said call detail types which may be included in a CDR template as either a "must-have" call detail or a "don'"'"'t care" call detail;

selecting said CDR template which includes;

(1) all of said must-have call details captured by said raw call information for said call;

(2) the greatest number of said "don'"'"'t care" call details captured by said raw call information for said call; and

(3) the least amount of store for call detail types which were not captured by said raw call information for said call.

9. A method of selectively formatting call detail information acquired during a call, comprising the steps of:

providing a first CDR template which contains all of said types of call details;

providing a table comprised of a plurality of CDR templates, each comprised of a selected subset of said types of call details;

providing a call detail type attribute map, said call detail type attribute map describing an attribute of each one of said types of call details;

determining whether to format said call detail information using said first CDR template or one of said plurality of CDR templates included in said table;

if said first CDR template is selected, formatting said call detail information in accordance with a full-set data structure defined by said first CDR template;

if said CDR template table is selected, examining said call detail information acquired during a call, said plurality of CDR templates and said call detail type attribute map, selecting a CDR template based upon said examination of said call detail information acquired during said call, said plurality of CDR templates and said call detail attribute map and formatting said call detail information in accordance with a subset data structure defined by said selected CDR template;

wherein the step of selecting, from said plurality of CDR templates, a CDR template based upon said examination of said call detail information acquired during said call, said plurality of CDR templates and said call detail type attribute map further comprises the steps of;

for each one of said plurality of CDR templates, comparing said call detail information for said call to said call detail map and to said CDR template; and

based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail attribute map and said CDR template, selecting one of said plurality of CDR templates for use in formatting said call detail information for said call.

10. The method of claim 9 wherein the step of selecting one of said plurality of CDR templates for use in formatting said call detail information for said call based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template further comprises the step of:

selecting, based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template, said CDR template which best fits said call detail information for said call.

11. The method of claim 10 wherein said call detail information is comprised of a plurality of call details, each of a different type, and each one of said plurality of CDR templates defines a plurality of call detail types and wherein the step of comparing each of said plurality of CDR templates to said call detail information further comprises the step of:

classifying each one of said call detail types which may be included in a CDR template as either a "must-have" call detail or a "don'"'"'t care" call detail;

selecting said CDR template which includes;

(1) all of said must-have call details captured by said raw call information;

(2) the greatest number of said "don'"'"'t care" call details captured by said raw call information; and

(3) the least amount of store for call detail types which were not captured by said raw call information.

12. A method of selectively formatting call detail information acquired during a call, comprising the steps of:

providing a first CDR template which contains all types of call details potentially acquired during said call;

providing a table comprised of a plurality of CDR templates, each comprised of a selected subset of said types of call details;

providing a call detail type attribute map, said call detail type attribute map describing an attribute of each one of said types of call details;

determining whether to format said call detail information using said first CDR template;

if said first CDR template is selected, formatting said call detail information in accordance with a full-set data structure defined by said first CDR template;

if said first CDR template is not selected, examining call detail information acquired during said call to determine whether said first CDR template or one of said plurality of CDR templates included in said CDR template table is to be selected;

if one of said plurality of CDR templates are to be selected, determining if one of said plurality of CDR templates has been pre-selected;

if one of said plurality of CDR templates has been pre-selected, formatting said call detail information acquired during said call in accordance with said pre-selected CDR templates;

if one of said plurality of CDR templates has not been pre-selected, examining each one of said plurality of CDR templates contained in said table, selecting a CDR template based upon said examination of said call detail information acquired during said call, said examination of each one of said plurality of CDR templates contained in said table and said call detail type attribute map, and formatting said call detail information in accordance with a subset data structure defined by said selected CDR template;

wherein the step of selecting, from said plurality of CDR templates, a CDR template based upon said examination of said call detail information acquired during said call, said plurality of CDR templates and said call detail type attribute map further comprises the steps of;

for each one of said plurality of CDR templates, comparing said call detail information for said call to said call detail type attribute map and to said CDR template; and

based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template, selecting one of said plurality of CDR templates for use in formatting said call detail information for said call.

13. The method of claim 12 wherein the step of selecting one of said plurality of CDR templates for use in formatting said call detail information for said call based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template further comprises the step of:

selecting, based upon said comparison, for each one of said plurality of CDR templates, of said call detail information for said call to said call detail type attribute map and said CDR template, said CDR template which best fits said call detail information for said call.

14. The method of claim 13 wherein said call detail information acquired during said call is comprised of a plurality of call details, each of a different type, and each one of said plurality of CDR templates defines a plurality of call detail types and wherein the step of selecting one of said plurality of CDR templates based upon said comparison of each of said plurality of CDR templates to said call detail information acquired during said call further comprises the step of:

classifying each one of said call detail types which may be included in a CDR template as either a "must-have" call detail or a "don'"'"'t care" call detail;

selecting said CDR template which includes;

(1) all of said must-have call details included in said call detail information acquired during said call;

(2) the greatest number of said "don'"'"'t care" call details included in said call detail information acquired during said call; and

(3) the least amount of store for call detail types which were not included in said call detail information acquired during said call.

15. The method of claim 14 and further comprising the step of:

generating a capture map which describes said call detail information acquired during said call;

wherein said provided call detail type attribute map describes whether each one of said call detail types is a "must-have" call detail or a "don'"'"'t care" call detail; and

adding said capture map and said call detail type attribute map to determine the number of "must-have" and "don'"'"'t care" call details included in said call detail information acquired during said call.