WO1999056478A1 - Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee - Google Patents

Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee Download PDF

Info

Publication number
WO1999056478A1
WO1999056478A1 PCT/SE1999/000632 SE9900632W WO9956478A1 WO 1999056478 A1 WO1999056478 A1 WO 1999056478A1 SE 9900632 W SE9900632 W SE 9900632W WO 9956478 A1 WO9956478 A1 WO 9956478A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit switched
switched call
announcing
called party
mobile terminal
Prior art date
Application number
PCT/SE1999/000632
Other languages
English (en)
Inventor
Göran HALL
Henrik Hummelgren
Chris Kannas
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to CA002330593A priority Critical patent/CA2330593A1/fr
Priority to AU42992/99A priority patent/AU4299299A/en
Priority to JP2000546530A priority patent/JP2002513258A/ja
Publication of WO1999056478A1 publication Critical patent/WO1999056478A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold

Definitions

  • the present invention generally relates to the telecommunications field and, in particular, to an announcing system and method used in a communications network for holding an incoming circuit switched call directed to a mobile terminal currently operating in packet switched mode
  • circuit switched communications include voice and data messages that occur in a circuit switched network incorporating, for example, the Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN)
  • packet switched communications include data applications that occur in a packet switched network incorporating, for example, the Internet
  • the voice paging service when active operates to notify the subscriber or called party whenever the calling party attempts to establish a circuit switched connection with the busy mobile terminal. However, when the voice paging service is not active then the circuit switched call is rejected and a busy tone is transmitted to the calling party.
  • a proposal addressing the problem has been submitted to the Japanese standards organization, which is responsible for maintaining and updating the Personal Digital Cellular (PDC) specification.
  • the proposal discloses a new message that is generated and transmitted to the busy mobile terminal whenever the calling party attempts to establish a connection between the circuit switched call and the busy mobile terminal.
  • the new message contains a phone number of the calling party.
  • the calling party is not notified that the called party is currently communicating in packet switched mode and that there is a possibility that the connection for the circuit switched call will not be established.
  • the present invention is a method and announcing system used in a telecommunications network for holding an incoming circuit switched call of a calling party directed to a mobile terminal currently operating in packet switched mode.
  • the announcing system includes an announcing unit for transmitting a reply message to the -3- calling party.
  • the reply message informs the calling party that the mobile terminal is busy and requests the calling party to wait while the mobile terminal is notified that the circuit switched call has been received
  • a method and announcing system are provided to hold an incoming circuit switched call whenever a mobile terminal is operating in packet switched mode
  • a method and announcing system are provided to inform a called party that a calling party is attempting to establish a circuit switched connection with a mobile terminal currently being used by the called party in packet switched mode when the voice paging service is active
  • a method and announcing system that transmits to a called party the phone number of a calling party trying to establish a circuit switched connection.
  • a method and announcing system are provided that will enable an operator of the telecommunications network to charge a called party and/or calling party for the services of the present invention
  • FIGURE 1 is a diagram of a telecommunications network incorporating an exemplary announcing system in accordance with the present invention
  • FIGURE 2 is a block diagram illustrating in greater detail the announcing system shown in FIGURE 1 ; and FIGURE 3 is a signal sequence chart illustrating an operation of the announcing system shown in FIGURES 1 and 2.
  • FIGS 1-3 there is disclosed an exemplary announcing system 50, which can be used to implement a preferred embodiment of the present invention.
  • a communications network 100 embodying the announcing system embodying the announcing system
  • PDC Personal Digital Cellular System
  • FIGURE 1 there is illustrated a diagram of the communications network 100 incorporating the exemplary announcing system 50.
  • the general architecture of the communications network 100 is well known and includes a packet switched network 102 and a circuit switched network 104.
  • the circuit switched network 104 includes a land-based terminal 106 (e.g., fixed terminal, PSTN/ISDN telephone) used by a calling party to initiate a circuit switched call 108, which is transmitted through a network 110 (e.g., PSTN/ISDN) to a gateway mobile services switching center (GMSC) 112.
  • the GMSC 112 interrogates a home location register (HLR) 114 to determine if a mobile terminal 116 is in packet switched mode (e.g., data messages) or circuit switched mode (e.g., voice messages).
  • the HLR 114 is common to both the packet switched network 102 and the circuit switched network 104.
  • the mobile terminal 1 16 utilizes the packet switched network 102 while operating in packet switched mode and the circuit switched network 104 while operating in circuit switched mode.
  • the HLR 114 in addition to knowing whether the mobile terminal 116 is operating in packet or circuit switched mode also maintains subscription data and keeps track of the location or VMSC service area where the mobile terminal currently resides.
  • the HLR 114 is able to keep track of the current location of the mobile terminal 116, because as the mobile terminal travels into a geographic area served by a particular -5- radio network 118 it registers with a visited mobile services switching center (VMSC) 120 or a visited packet mobile services switching center (VPMSC) 128 that informs the HLR of the mobile terminal's current location.
  • VMSC visited mobile services switching center
  • VPN visited packet mobile services switching center
  • the VMSC 120 preferably houses the announcing system 50.
  • the packet switched network 102 includes an Internet host 122 (e.g., fixed terminal) capable of communicating with the mobile terminal 116 through an Internet network 124.
  • the Internet network 124 connects to a gateway packet mobile services switching center (GPMSC) 126 that communicates with the HLR 1 14.
  • GPMSC gateway packet mobile services switching center
  • VPMSC 128, also connects to the VPMSC 128, where the GPMSC and VPMSC are similar to the GMSC 112 and VMSC 120 of the circuit switched network 104. There may also be multiple VPMSCs 128 located within the packet switched network 104.
  • the mobile terminal 116 typically communicates with a data terminal equipment (DTE) 130 to allow packet data communication.
  • DTE data terminal equipment
  • the DTE 130 may incorporate the DTE 130 instead of connecting to the DTE (as shown).
  • the DTE 130 is assigned a permanent address or dynamic address. This address is known as an Internet Protocol (IP) address.
  • IP Internet Protocol
  • the announcing system 50 may stand alone (as described) or be housed anywhere within the communications network 100.
  • the announcing system 50 may be implemented by either software, hardware, or a combination of software and hardware.
  • the hardware implementation is discussed herein.
  • the announcing system 50 is triggered when the mobile terminal 116 and DTE 130 are connected to the Internet host 122 (e.g., packet switched mode) when the calling party attempts to establish a connection for the circuit switched call 108 with the busy mobile terminal.
  • a controller 200 of the announcing system 50 receives the circuit switched call 108 from the GMSC 112 (FIGURE 1).
  • the controller 200 is coupled to an announcing unit 202 that transmits a reply message 204 to the land based terminal 106 or calling party when the controller 200 receives the circuit switched call 108.
  • the controller 200 may be located in the VMSC 120 (FIGURE 1) instead of the announcing system 50.
  • the reply message 204 (e.g., digital voice, text) informs the calling party that the mobile terminal 116 and called party (e.g., subscriber) are currently communicating in packet switched mode, with, for example, the Internet host 122.
  • the reply message 204 also requests the calling party to wait while the called party and mobile terminal
  • the reply message 204 informs the calling party that the mobile terminal 116 is busy and that the called party may answer in the near future.
  • the announcing unit 202 further generates and initiates a presentation message 206 (e.g., digital voice, text) to inform the called party that the calling party via the circuit switched call 108 is attempting to establish a connection with the mobile terminal 116.
  • the presentation message 206 is transmitted on a packet channel of the packet switched network 102.
  • the presentation message 206 can also include a phone number of the calling party.
  • the called party may refer to the phone number in the presentation message 206 to determine whether or not to accept the circuit switched call 108.
  • the called party accepts the circuit switched call 108, then the current packet switched communication is disconnected and the circuit switched call is connected.
  • the called party can accept the circuit switched call 108 in several ways including, for example, by depressing a button or by saying a particular word(s).
  • the called party may also accept the circuit switched call 108 or return a call to the calling party after completing the packet switched communications. Otherwise, if the called party rejects the circuit switched call 108 then the announcing unit 202 generates and transmits a busy message 208 to the calling party.
  • a timer 210 can be used to inform the controller 200 to reject the circuit switched call 108 if the called party does not accept or reject the circuit switched call -7- within a predetermined amount of time.
  • the called party or operator of the communications network 100 determines the duration of the predetermined amount of time that is first measured from the time the controller 200 receives the circuit switched call 108.
  • the busy message 208 may be sent to the calling party if the predetermined amount of time has passed.
  • the announcing system 50 is capable of a supporting multiple mobile terminals 116 and multiple incoming circuit switched calls 108 at any given time, however, for clarity, only one mobile terminal and circuit switched call 108 are discussed.
  • the various messages and steps to implement the announcing system 50 will be discussed in detail with reference to FIGURE 3. Referring to FIGURE 3, there is illustrated a signal sequence chart showing the events occurring between the time the circuit switched call 108 is initiated through the time the incoming circuit switched call is connected, if at all.
  • the operation of the announcing system 50 may be performed within either the packet switched network 102 or the circuit switched network 104 of the communications network 100 based on the PDC specification.
  • other specifications or standards may be used that incorporate both the packet switched network 102 and the circuit switched network 104 such as, for example, the Digital -Advanced Mobile Phone
  • D-AMPS Digital Cellular System
  • GSM Global System for Mobile Communications
  • FIG. 3 illustrates the signaling that occurs between the announcing system 50, land based terminal 106, GMSC 112, HLR 114, VMSC 120, VPMSC 128, and the mobile terminal 116 or DTE 130; of course, the arrows indicate the direction of the communications.
  • the called party transmits the circuit switched call 108 as an initial address message (IAM) 300 from the land based terminal 106 towards the GMSC 112.
  • IAM initial address message
  • the GMSC 112 forwards a Terminating Call Routing Retrieval (TCRR) signal 302 to the HLR 114.
  • TCRR Terminating Call Routing Retrieval
  • the HLR 114 In response to receiving the signal 302, the HLR 114 generates and transmit a TCRR reply signal 304 back to the GMSC 112.
  • TCRR Terminating Call Routing Retrieval
  • the TCRR reply signal 304 indicates whether the mobile terminal 116 is in packet switched mode or circuit switched mode.
  • the IAM 300 or circuit switched call 108 is routed to the controller 200 via the VMSC 120, when the TCRR reply signal 304 indicates that the mobile terminal 116 is currently communicating in packet switched mode.
  • the announcing system 50 and, more specifically, the announcing unit 202 then generates and transmits the reply message 204 to the calling party located at the land based terminal 106.
  • the reply message 204 informs the calling party that the mobile terminal 116 is busy and that the called party may answer in the near future.
  • the announcing unit 202 further generates and transmits the presentation message or CS call request message 206 to the VMSC 120, which then transmits the CS call request message (e.g., A number) to the VPMSC 128. Thereafter, the VPMSC 128 transmits the CS call request message 206 on the packet channel to the DTE 130 and the mobile terminal 116.
  • the CS call request signal 206 may include the phone number of the calling party, and can be a modified "UPCH Voice Paging" message referenced in the PDC specification.
  • the called party at the mobile terminal 116 and the DTE 130 can accept or reject the circuit switched call 108. If the called party rejects the circuit switched call 108 by affirmative action (e.g., depressing a button) or nonaction (e.g., passing of a predetermined amount of time) then a CS call request response 21 la set for reject is transmitted via the VPMSC 128 through the VMSC 120 to the announcing system 50. The announcing unit 202 then transmits the busy message 208 to the calling party. Alternatively, the announcing unit 202 could reroute the circuit switched call 108 to a voice mail service, or forward the circuit switched call to another phone number instead of transmitting the busy message 208 when the called party rejects the circuit switched call.
  • affirmative action e.g., depressing a button
  • nonaction e.g., passing of a predetermined amount of time
  • a CS call request response 21 lb set for accept is transmitted via the VPMSC 128 through the VMSC 120 to the announcing system 50.
  • the VPMSC 128 operates to disconnect the current packet switched communication and the VMSC 120 operates to connect the circuit switched call 108.
  • the CS call request response 211a (reject) and 21 lb (accept) can be a "UPCH Voice Paging Response" message referenced in the PDC specification.
  • CS call request response 211a (reject) and CS call request response 21 lb (accept) between the VMSC 120 and VPMSC (128), and -9- between the VPMSC 128 and MSI 16/DTE 130 may be functionally the same but not physically the same message.
  • the mobile terminal 116 could send a terminating condition report on a CCH channel after packet disconnection.
  • the CCH channel described in the PDC standard, sends the terminating condition report (TCRR) signal used by an idle mobile station as a response to a paging signal for a circuit switched call from the network.
  • TCRR terminating condition report
  • the present invention provides a method and system for holding an incoming circuit switched call when a mobile terminal of a called party is operating in packet switched mode.
  • the system as disclosed may be used to transmit to the called party a phone number of the calling party.
  • the disclosed system may enable an operator of the communications network to charge the called party or the calling party for the services of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un réseau de communication (100) comprenant un procédé et un système d'avertissement (50) permettant de mettre en attente l'appel à commutation de circuit d'arrivée (108) d'un appelant (106), qui est dirigé vers un terminal mobile (116) fonctionnant actuellement en mode à commutation par paquets. Le système d'avertissement comprend une unité d'avertissement (202) permettant de transmettre un message réponse (204) à l'appelant (106). Le message réponse (204) informe l'appelant (106) que le terminal mobile (116) est occupé et lui demande d'attendre, tandis que le terminal mobile (116) est informé que l'appel à commutation de circuit (108) a été reçu.
PCT/SE1999/000632 1998-04-27 1999-04-20 Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee WO1999056478A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002330593A CA2330593A1 (fr) 1998-04-27 1999-04-20 Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee
AU42992/99A AU4299299A (en) 1998-04-27 1999-04-20 An announcing system and method used in a communications network for holding incoming circuit switched calls
JP2000546530A JP2002513258A (ja) 1998-04-27 1999-04-20 着信回路交換呼を保留する通信網に使用されるアナウンスシステムおよび方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6758998A 1998-04-27 1998-04-27
US09/067,589 1998-04-27

Publications (1)

Publication Number Publication Date
WO1999056478A1 true WO1999056478A1 (fr) 1999-11-04

Family

ID=22077049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/000632 WO1999056478A1 (fr) 1998-04-27 1999-04-20 Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee

Country Status (4)

Country Link
JP (1) JP2002513258A (fr)
AU (1) AU4299299A (fr)
CA (1) CA2330593A1 (fr)
WO (1) WO1999056478A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6879820B2 (en) 2000-07-12 2005-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Charging in communication networks having split control planes and user planes
US6973054B2 (en) 2001-01-05 2005-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Communication management in mobile networks having split control planes and user planes
WO2006039046A1 (fr) * 2004-10-01 2006-04-13 Motorola, Inc. Procede et systeme de communication permettant d'etablir une connexion pour une communication vocale
US7103002B2 (en) 2000-07-12 2006-09-05 Telefonktiebolaget Lm Ericsson (Publ) Communication management in networks having split control planes and user planes
EP1863298A1 (fr) * 2006-05-29 2007-12-05 NTT DoCoMo, Inc. Système de téléphone cellulaire, dispositif de contrôle d'appels de téléphone vidéo, procédé de contrôle des appels de téléphone cellulaire et de téléphone vidéo
CN100401819C (zh) * 2004-07-14 2008-07-09 乐金电子(中国)研究开发中心有限公司 便携终端的通话中语音消息接收装置及其方法
JP2009055455A (ja) * 2007-08-28 2009-03-12 Ntt Docomo Inc 通信システム及び通信方法
EP2172040A1 (fr) * 2007-06-22 2010-04-07 Telefonaktiebolaget LM Ericsson (PUBL) Réponse à une demande de radiomessagerie à commutation de circuits
US7983242B2 (en) 2003-08-18 2011-07-19 Qualcomm, Incorporated Packet data service with circuit-switched call notification

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063588A (en) * 1988-11-21 1991-11-05 Motorola, Inc. Communication system providing automatic identification of calling parties
US5513251A (en) * 1993-12-30 1996-04-30 At&T Corp. Method for providing call waiting service
WO1997026764A1 (fr) * 1996-01-16 1997-07-24 Nokia Telecommunications Oy Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement
US5666364A (en) * 1996-03-01 1997-09-09 Motorola, Inc. Method for prioritizing services provided by different network entities
US5701297A (en) * 1989-09-27 1997-12-23 Motorola, Inc. Data over cellular

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5063588A (en) * 1988-11-21 1991-11-05 Motorola, Inc. Communication system providing automatic identification of calling parties
US5701297A (en) * 1989-09-27 1997-12-23 Motorola, Inc. Data over cellular
US5513251A (en) * 1993-12-30 1996-04-30 At&T Corp. Method for providing call waiting service
WO1997026764A1 (fr) * 1996-01-16 1997-07-24 Nokia Telecommunications Oy Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement
US5666364A (en) * 1996-03-01 1997-09-09 Motorola, Inc. Method for prioritizing services provided by different network entities

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6879820B2 (en) 2000-07-12 2005-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Charging in communication networks having split control planes and user planes
US7103002B2 (en) 2000-07-12 2006-09-05 Telefonktiebolaget Lm Ericsson (Publ) Communication management in networks having split control planes and user planes
US6973054B2 (en) 2001-01-05 2005-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Communication management in mobile networks having split control planes and user planes
US7983242B2 (en) 2003-08-18 2011-07-19 Qualcomm, Incorporated Packet data service with circuit-switched call notification
US8837464B2 (en) 2003-08-18 2014-09-16 Qualcomm Incorporated Packet data service with circuit-switched call notification
CN100401819C (zh) * 2004-07-14 2008-07-09 乐金电子(中国)研究开发中心有限公司 便携终端的通话中语音消息接收装置及其方法
WO2006039046A1 (fr) * 2004-10-01 2006-04-13 Motorola, Inc. Procede et systeme de communication permettant d'etablir une connexion pour une communication vocale
EP1863298A1 (fr) * 2006-05-29 2007-12-05 NTT DoCoMo, Inc. Système de téléphone cellulaire, dispositif de contrôle d'appels de téléphone vidéo, procédé de contrôle des appels de téléphone cellulaire et de téléphone vidéo
EP2172040A1 (fr) * 2007-06-22 2010-04-07 Telefonaktiebolaget LM Ericsson (PUBL) Réponse à une demande de radiomessagerie à commutation de circuits
EP2172040B1 (fr) * 2007-06-22 2017-06-07 Telefonaktiebolaget LM Ericsson (publ) Réponse à une demande de radiomessagerie à commutation de circuits
JP2009055455A (ja) * 2007-08-28 2009-03-12 Ntt Docomo Inc 通信システム及び通信方法

Also Published As

Publication number Publication date
JP2002513258A (ja) 2002-05-08
AU4299299A (en) 1999-11-16
CA2330593A1 (fr) 1999-11-04

Similar Documents

Publication Publication Date Title
JP4059348B2 (ja) 話中の加入者に対するショートメッセージサービスを行うためのフロー制御方法
AU719420B2 (en) Optimized routing of terminating calls within a mobile telecommunications network
EP0847174B1 (fr) Méthode et appareil pour traitement d'appel dans un réseau de données
US7945274B2 (en) Repeat dialing in wireless networks to busy called parties
EP1065870B1 (fr) Téléphonie à protocole Internet
US20020111167A1 (en) System and method of providing voice and data features in a time division multiple access (TDMA) network
US5797103A (en) Method and apparatus for informing a remote unit of a feature-originated call
US6473422B2 (en) Communications network and method for screening incoming circuit switched calls
JPH10503335A (ja) セルラー通信システムにおける短メッセージ送信の開始
JP2000511754A (ja) パケット無線ネットワークにおけるショートメッセージの配送
WO1997026764A1 (fr) Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement
EP1201093A2 (fr) Basculement de terminaux sur un service a commutation de circuits depuis un service a commutation de paquets, et systemes a cet effet
US20050096006A1 (en) Subscriber selectable alternative to audible ringback signals
US6456842B1 (en) System and method for subscriber-controlled call back on busy in a cellular network
US20050036457A1 (en) Messaging services offered in mobile communication systems
KR20060105597A (ko) 무선 네트워크 및 무선 네트워크 동작 방법
KR20020011407A (ko) 예비 호출을 이용하는 무선 통신 시스템에서의 오류처리를 위한 방법 및 시스템
WO1999056478A1 (fr) Systeme d'avertissement et procede utilise dans un reseau de communication pour mettre en attente les appels a commutation de circuit d'arrivee
CA2330075C (fr) Possibilite de service de telecommunications cellulaire
EP1294204A1 (fr) Passerelle avec émulation de la présence d'un téléphone mobile
US20070135123A1 (en) Method and apparatus for flexible alerting using a packet gateway
KR101054081B1 (ko) 해외 로밍 단말을 위한 사서함 서비스 장치 및 그 방법
KR20010028310A (ko) 통화중인 가입자에게 접속 요청을 알리는 방법
KR100234833B1 (ko) 호 전환 실패 호의 음성 사서함 서비스 전환 방법
EP1616443B1 (fr) Procede de communication pour services mobiles

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
ENP Entry into the national phase

Ref document number: 2330593

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase