CA2305167A1 - Method of routing calls to portable numbers in a radio telecommunications network - Google Patents

Method of routing calls to portable numbers in a radio telecommunications network Download PDF

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Publication number
CA2305167A1
CA2305167A1 CA002305167A CA2305167A CA2305167A1 CA 2305167 A1 CA2305167 A1 CA 2305167A1 CA 002305167 A CA002305167 A CA 002305167A CA 2305167 A CA2305167 A CA 2305167A CA 2305167 A1 CA2305167 A1 CA 2305167A1
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CA
Canada
Prior art keywords
routing
routing number
msc
hlr
destination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002305167A
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French (fr)
Other versions
CA2305167C (en
Inventor
Margaret Britt
Nadia Bishai
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Telefonaktiebolaget LM Ericsson AB
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Individual
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Filing date
Publication date
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Publication of CA2305167A1 publication Critical patent/CA2305167A1/en
Application granted granted Critical
Publication of CA2305167C publication Critical patent/CA2305167C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H04W8/28—Number portability ; Network address portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H04Q3/005—Personal communication services, e.g. provisions for portability of subscriber numbers

Abstract

A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB). The O-MSC determines whether to send a Location Request (LOCREQ) message to the HLR for a routing number, or to send a Number Portability Request (NPREQ) message to the NPDB for a location routing number (LRN).
The determination may be based on operator preference, a default preference, or statistics indicating that either the HLR or the NPDB is more likely to return a routing number. The O-MSC then attempts to obtain a routing number from the determined destination. If an error message is returned, the O-MSC attempts to obtain a routing number from the alternate destination. Upon receipt of a routing number, the O-MSC routes the call. In an alternative embodiment, the O-MSC may send the LOCREQ message and the NPREQ message simultaneously, and utilize the first routing number received to route the call.

Claims (12)

1. A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB), said method comprising the steps of:
attempting to obtain a first routing number from the HLR;
obtaining a second routing number from the NPDB upon receiving an error message from the HLR; and routing the call to the second routing number.
2. The method of routing a call directed to a portable directory number of claim 1 wherein the step of attempting to obtain a first routing number from the HLR
includes sending a Location Request (LOCREQ) Invoke message from the O-MSC
to the HLR, said LOCREQ message including a dialed directory number.
3. The method of routing a call directed to a portable directory number of claim 2 wherein the step of obtaining a second routing number from the NPDB
includes sending a Number Portability Request (NPREQ) Invoke message from the O-MSC to the NPDB, said NPREQ message including a dialed directory number.
4. A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB), said method comprising the steps of:
determining in the O-MSC whether to send a first routing number request to a first destination or an alternate destination;
sending the first routing number request to the first destination;
determining whether a routing number was received in the O-MSC in response to the first routing number request;
sending a second routing number request to the alternate destination, upon determining that a routing number was not received in the O-MSC in response to the first routing number request;
receiving a routing number in response to the second routing number request;
and routing the call to the routing number received in response to the second routing number request.
5. The method of routing a call directed to a portable directory number of claim 4 wherein the step of determining in the O-MSC whether to send a first routing number request to a first destination or an alternate destination includes the steps of:
determining whether a preferred destination has been set by a system operator;
and selecting the preferred destination to receive the routing number query.
6. The method of routing a call directed to a portable directory number of claim 4 wherein the step of determining in the O-MSC whether to send a first routing number request to a first destination or an alternate destination includes the steps of:
determining whether a default parameter has been set that specifies a preferred destination; and selecting the default destination to receive the routing number query.
7. The method of routing a call directed to a portable directory number of claim 6 wherein the step of determining in the O-MSC whether to send a first routing number request to a first destination or an alternate destination also includes the steps of:
calculating a first error percentage, said first error percentage being a percentage of queries sent to the default destination that return error responses;
determining whether the first error percentage exceeds a first predefined threshold; and selecting the alternate destination to receive the routing number query upon determining that the first error percentage exceeds the first predefined threshold.
8. The method of routing a call directed to a portable directory number of claim 7 wherein the step of determining in the O-MSC whether to send a first routing number request to a first destination or an alternate destination also includes the steps of:
calculating a second error percentage, said second error percentage being a percentage of queries sent to the alternate destination that return error responses;
determining whether the second error percentage exceeds a second predefined threshold; and selecting the default destination to receive the routing number query upon determining that the second error percentage exceeds the second predefined threshold.
9. The method of routing a call directed to a portable directory number of claim 8 wherein the step of determining whether the second error percentage exceeds a second predefined threshold includes determining whether the second error percentage exceeds a threshold equaling the first predefined threshold plus a hysteresis value.
10. A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB), said method comprising the steps of:
simultaneously sending routing number requests from the O-MSC to the HLR
and the NPDB; and utilizing the first routing number received to route the call.
11. The method of routing a call directed to a portable directory number of claim 10 further comprising, after the step of simultaneously sending routing number requests, the steps of:
receiving a first response to the routing number requests;
determining whether the first response includes a routing number; and waiting for a second response to the routing number requests, upon determining that the first response did not include a routing number.
12. A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB), said method comprising the steps of:
sending a first routing number request from the O-MSC to the HLR, said first routing number request including a dialed directory number;
determining in the HLR whether a routing number is assigned to the dialed directory number;
sending a second routing number request from the HLR to the NPDB upon determining that a routing number is not assigned to the dialed directory number in the HLR, said second routing number request including the dialed directory number;
retrieving from the NPDB, a location routing number (LRN) assigned to the dialed directory number;
sending the LRN from the NPDB to the HLR in a first response message;
sending the LRN from the HLR to the O-MSC in a second response message;
and routing the call to the LRN.
CA2305167A 1997-10-07 1998-10-02 Method of routing calls to portable numbers in a radio telecommunications network Expired - Lifetime CA2305167C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US6124197P 1997-10-07 1997-10-07
US60/061,241 1997-10-07
US09/140,713 1998-08-26
US09/140,713 US6161017A (en) 1997-10-07 1998-08-26 Method of routing calls to portable numbers in a radio telecommunications network
PCT/SE1998/001782 WO1999018749A2 (en) 1997-10-07 1998-10-02 Method of routing calls to portable numbers in a radio telecommunications network

Publications (2)

Publication Number Publication Date
CA2305167A1 true CA2305167A1 (en) 1999-04-15
CA2305167C CA2305167C (en) 2012-09-18

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CA2305167A Expired - Lifetime CA2305167C (en) 1997-10-07 1998-10-02 Method of routing calls to portable numbers in a radio telecommunications network

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US (2) US6161017A (en)
AU (1) AU9468698A (en)
BR (1) BR9813025A (en)
CA (1) CA2305167C (en)
WO (1) WO1999018749A2 (en)

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Also Published As

Publication number Publication date
WO1999018749A2 (en) 1999-04-15
CA2305167C (en) 2012-09-18
WO1999018749A3 (en) 2002-10-10
AU9468698A (en) 1999-04-27
US6226517B1 (en) 2001-05-01
BR9813025A (en) 2000-08-15
US6161017A (en) 2000-12-12

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Effective date: 20181002