Method and system for dynamic customized call routing

• US 5,530,744 A
• Filed: 09/20/1994
• Issued: 06/25/1996
• Est. Priority Date: 09/20/1994
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Charalambous, Salomi T., Durinovic-Johri, Sanja, Levy, Yonatan A.
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Wolinsky, Scott
• Application Number:
  US08/309,361
• Time in Patent Office: 644 Days
• Field of Search: 379/201, 379/209, 379/207, 379/213, 379/221, 379/265, 379/196, 379/211, 379/212, 379/266, 379/113, 379/309, 379/112
• US Class Current: 379/266.08
• CPC Class Codes: H04M 3/36 Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
• CPC Class Codes: H04M 3/42059 Making use of the calling party identifier
• CPC Class Codes: H04M 3/42306 Number translation services, e.g. premium-rate, freephone or vanity number services
• CPC Class Codes: H04M 3/523 with call distribution or queueing
• CPC Class Codes: H04M 3/5237 Interconnection arrangements between ACD systems
• CPC Class Codes: H04M 3/5238 with waiting time or load prediction arrangements
• CPC Class Codes: H04Q 2213/13072 Sequence circuits for call signaling, ACD systems
• CPC Class Codes: H04Q 2213/13512 800 - freefone
• CPC Class Codes: H04Q 2213/13541 routing
• CPC Class Codes: H04Q 3/0029 Provisions for intelligent networking

Abstract

A cooperative network/premises-based automatic call distributor system and method predicts changes in automatic call distributor status between periodic updates of the measured status obtained by a Telemarketing Operations Performance Management System (TOPMS). A call directed to a telemarketing complex arrives at the network. The caller automatic number identification (ANI) and an identifying tag are forwarded via a data connection to a customer routing point. The Next Available Agent (NAA) application enables 800-service customers to control the routing of calls to multiple customer sites (ACDs) via a Customer Routing Point (CRP). This control is based on periodic updates of the status of each site provided by a Telemarketing Operations Performance Management System (TOPMS) in an Intelligent Call Processing (ICP) environment. A customized routing method is incorporated into a new CRP-based load balancing method for the NAA. The method offers flexibility to address diverse customer needs such as geographic preferences and constraints, least cost preferences, performance thresholds, and performance objectives.

Claims

1. A method of selecting a destination automatic call distributor from a plurality of automatic call distributors for a call routed over a telecommunications network, each automatic call distributor associated with a number of agents, said method comprising the telecommunications network implemented steps of:

receiving said call at an arbitrary time;

transmitting a signal according to information associated with said call to a customer routing point, said customer routing point receiving information related to automatic call distributor status from a data collection point, said data collection point receiving automatic call distributor information from each of said automatic call distributors, said customer routing point selecting said destination automatic call distributor from among said plurality of automatic call distributors based on the customer routing point generating a status prediction for at least one of the automatic call distributors, said status prediction dependent on the information related to automatic call distributor status and on the arbitrary time of the call;

receiving a routing label signal indicating said selected destination automatic call distributor from said customer routing point;

connecting said call to said selected destination automatic call distributor according to said routing label signal.

2. The method according to claim 1, wherein said information received by the customer routing point from said data collection point includes, for each of said plurality of automatic call distributors, number of agents available, number of calls in progress, average handling time, and cumulative number of calls.

3. The method according to claim 1, wherein said status prediction accounts for calls expected to arrive at the automatic call distributor and not handled by the customer routing point.

4. The method according to claim 1, wherein said information received by the customer routing point from said data collection point includes, for each of said plurality of automatic call distributors, number of agents available, number of agents idle, number of calls in queue, calls in progress, average handling time, and cumulative number of calls.

5. The method according to claim 1, wherein said information received by the customer routing point from said data collection point includes, for each of said plurality of automatic call distributors, number of idle agents, number of agents available, number of agents idle, number of calls in queue, call removal rate, and cumulative number of calls.

6. The method according to claim 1, wherein said status prediction includes a predicted call queue size of an automatic call distributor.

7. The method according to claim 1, wherein said status prediction includes a predicted delay time in queue until an agent at an automatic call distributor services the call.

8. The method according to claim 1, wherein said customer routing point includes

a customized router means for determining the destination automatic call distributor by comparing customer specified parameters with the status prediction to identify a match.

9. The method according to claim 8, wherein said customer routing point includes

a load balancer means for determining the destination automatic call distributor when said customized router means cannot identify a match by optimizing overall automatic call distributor status based on the status prediction.

10. The method according to claim 9, wherein said customer routing point includes a load balancer means for determining the destination automatic call distributor by optimizing overall automatic call distributor status based on the status prediction.

11. A method of selecting a destination automatic call distributor from a group of automatic call distributors in a system comprising a plurality of switching offices, a customer routing point, a data collection point, first data links linking the offices and the customer routing point, second data links linking each of the automatic call distributors to the data collection point, and a third data link linking the data collection point to the customer routing point, the method comprising the steps of:

at each automatic call distributor,

accumulating data representative of the automatic call distributor call load status; and

repetitively transmitting the accumulated data to the data collection point;

at the data collection point,

repetitively transmitting a status signal representative of the accumulated data to the customer routing point;

at a switching office,

transmitting a query message containing a number identifying the automatic call distributor group to the customer muting point in response to receipt of a call directed

to the automatic call distributor group at an arbitrary call time;

at the customer routing point,

in response to the query message, generating an automatic call distributor status prediction for the arbitrary call time, said automatic call distributor status prediction based on said status signal and on the arbitrary call time; and

transmitting a routing signal identifying the destination automatic call distributor to the switching office according to the automatic call distributor status prediction.

12. The method according to claim 11, wherein said customer routing point includes

a customized router means for determining the destination automatic call distributor by comparing customer specified parameters with the automatic call distributor status prediction to identify a match.

13. The method according to claim 12, wherein said customer routing point includes

a load balancer means for determining the destination automatic call distributor when said customized router means cannot identify a match by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

14. The method according to claim 11, wherein said customer routing point includes a load balancer means for determining the destination automatic call distributor by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

15. A method of selecting a destination automatic call distributor from a group of automatic call distributors in a system comprising a plurality of telecommunications switches and a customer routing point, the method comprising the steps of:

acquiring data at the customer routing point from each of the automatic call distributors representing the automatic call distributor call load status;

querying the customer routing point in response to a call received at an arbitrary time at one of the telecommunications switches and directed to the automatic call distributors;

generating, at the customer routing point in response to said querying, an automatic call distributor status prediction representing expected automatic call distributor status at said arbitrary time, the automatic call distributor status prediction based on said data and on said arbitrary time; and

routing the call to the destination automatic call distributor according to said automatic call distributor status prediction.

16. The method according to claim 15, wherein said customer routing point includes

a customized router means for determining the destination automatic call distributor by comparing customer specified parameters with the automatic call distributor status prediction to identify a match.

17. The method according to claim 16, wherein said customer routing point includes

a load balancer means for determining the destination automatic call distributor when said customized router means cannot identify a match by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

18. The method according to claim 15, wherein said customer routing point includes a load balancer means for determining the destination automatic call distributor by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

19. The method according to claims 15, wherein the data acquired at said customer routing point for each automatic call distributor includes a number of agents available, a number of calls in progress, an average handling time for a call, and a cumulative number of calls offered.

20. The method according to claim 15, wherein the step of generating said automatic call distributor status prediction includes computing a function of a service rate, a rate of calls arriving at the automatic call distributor not handled by the customer routing point, the number of agents available, the number of calls in progress, and said time corresponding to the arbitrary time of call receipt.

21. An automatic call distributor system for routing a call directed to a group of automatic call distributors to a preferred one of the automatic call distributors over a telecommunications network, the system comprising:

means for receiving said call at the telecommunications network;

a customer routing point connected to said telecommunications network, wherein the customer routing point receives status information representing measured call load data of the automatic call distributors, and determines the destination automatic call distributor for said call according to predicting changes in automatic call distributor status over a time period elapsed since the measured call load data of the received status information was acquired, thereby providing an automatic call distributor status prediction; and

means for routing said call to the destination automatic call distributor in response to a routing signal generated by said customer routing point indicating the destination automatic call distributor.

22. The system according to claim 21, wherein said customer routing point includes a load balancer means for determining the destination automatic call distributor by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

23. The system according to claim 21, further comprising a data collection point connected to said customer routing point and to each of said automatic call distributors, said data collection point repetitively acquiring data from each of said plurality of automatic call distributors relating to call load, and repetitively transmitting said status information to the customer routing point.

24. The system according to claim 21, wherein said status information includes time data indicating when the measured call load status was acquired for each of the automatic call distributors.

25. The system according to claim 21, wherein said customer routing point includes

a customized router means for determining the destination automatic call distributor by comparing customer specified parameters with the automatic call distributor status prediction to identify a match.

26. The system according to claim 25, wherein said customer routing point includes

a load balancer means for determining the destination automatic call distributor when said customized router means cannot identify a match by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

27. The system according to claim 25, wherein said customer specified parameters include an ordered list of preferred destination automatic call distributors and conditions that must be satisfied to allow routing of the call to each destination automatic call distributor.

28. The system according to claim 25, wherein said customer specified parameters include geographic preferences, least cost preferences, and delay time thresholds.

29. A system for selecting a destination automatic call distributor from a group of automatic call distributors for a call directed to the automatic call distributors, comprising:

a plurality of telecommunications switches;

a customer routing point;

means for acquiring data at the customer routing point from each of the automatic call distributors representing the automatic call distributor call load status;

means for querying the customer routing point in response to a call received at an arbitrary time at one of the telecommunications switches;

means for generating, at the customer routing point in response to said querying, an automatic call distributor status prediction representing expected automatic call distributor status at said arbitrary time, the automatic call

distributor status prediction based on said data and on said arbitrary time; and

means for routing the call to the destination automatic call distributor according to said automatic call distributor status prediction.

30. The system according to claim 29, wherein said customer routing point includes a load balancer means for determining the destination automatic call distributor by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.

31. The system according to claim 29, wherein said customer routing point includes

a customized router means for determining the destination automatic call distributor by comparing customer specified parameters with the automatic call distributor status prediction to identify a match.

32. The system according to claim 31, wherein said customer routing point includes

a load balancer means for determining the destination automatic call distributor when said customized router means cannot identify a match by optimizing overall automatic call distributor status based on the automatic call distributor status prediction.