WO2002001899A1 - Systeme de radiocommunication cellulaire avec des moyens de reperage de terminaux defectueux - Google Patents
Systeme de radiocommunication cellulaire avec des moyens de reperage de terminaux defectueux Download PDFInfo
- Publication number
- WO2002001899A1 WO2002001899A1 PCT/FR2001/002036 FR0102036W WO0201899A1 WO 2002001899 A1 WO2002001899 A1 WO 2002001899A1 FR 0102036 W FR0102036 W FR 0102036W WO 0201899 A1 WO0201899 A1 WO 0201899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile station
- terminal
- identity
- access network
- radio
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
Definitions
- the present invention relates to cellular radio networks.
- Today's cellular networks distinguish between subscribers and the terminals they use.
- a mobile station communicating with the network is the association of a non-subscriber-specific terminal and a subscriber identification module (SIM) inserted in the terminal.
- SIM subscriber identification module
- This SIM module contains data which, with corresponding data stored in a network database called HLR (“Home Location Register”), make it possible to identify the subscriber and render the services to which he has subscribed.
- HLR Home Location Register
- This data includes in particular a subscriber number called the International Mobile Subscriber Identity (IMSI).
- IMSI International Mobile Subscriber Identity
- the terminal also has an equipment number called the International Mobile Equipment Identity (IMEI).
- IMEI International Mobile Equipment Identity
- the structure of the IMEIs is described in the technical specification 3G TS 22.016, version 3.1.0 published in December 1999 by the 3GPP (3 rd Generation Partnership Project).
- the terminal stores its IMEI and communicates it to the network on request.
- the option may be provided to designate the mobile station by the IMEl of its terminal. But in general, it is the subscriber identity (IMSI) which is used by the network to address a mobile station, which makes it possible to provide network services to subscribers regardless of the equipment they use. .
- IMSI subscriber identity
- Cellular networks of the GPRS (“General Packet Radio Service”) and UMTS (“Universal Mobile Telecommunications System”) types may include an optional database called EIR (“Equipment Identity Register”), in which IMEIs are stored.
- EIR Equipment Identity Register
- the EIR which can be viewed by network switches, contains a “white list” of IMEl for which use is permitted, a “black list” of prohibited IMEl (for example stolen terminals), and possibly a “gray list From IMEl that the operator can follow in the network.
- An object of the present invention is to allow operators to cellular networks to detect and take into account operational problems which the terminals can be affected, while the mobile stations are identified on the basis of the identities of subscribers and not on the basis of the terminals.
- the invention thus proposes a cellular radio communication system comprising on the one hand a core network comprising switches and subscriber management means, and on the other hand at least one radio access network connected to at least one switch of the core network and comprising base stations capable of communicating by radio with mobile stations, each mobile station comprising a terminal associated with a subscriber identification module.
- the core network includes means for interrogating a mobile station through the access network to obtain an identity of the terminal of the interrogated mobile station.
- the access network includes means for detecting malfunctions of mobile stations, for sending to the core network an alert message identifying a mobile station for which a malfunction has been detected.
- the interrogation means are controlled to interrogate a mobile station in order to obtain the identity of its terminal in response to the reception of an alert message identifying said mobile station.
- Malfunctions are detected in the access network, which does not necessarily have the means to obtain the identities of the terminals in question.
- the core network collects information allowing the identification of defective terminals, and can carry out all kinds of actions as a result: warning the holders of defective terminals, preventing them from using these terminals in the event of a problem. likely to seriously disturb the communications of other subscribers, warn the manufacturers in the event of problems noted on a series of terminals, etc.
- the core network comprises at least one faulty terminal database containing records relating to terminals whose identity has been obtained by the interrogation means in response to the reception of a message from alert.
- These records may include other elements contained in the alert message such as a subscriber identity used to identify the mobile station, an indication of the type or level of severity of the detected malfunction, etc.
- the detected malfunctions relate in particular to the power emitted by the mobile stations. They may also relate to other aspects such as errors in the implementation of the communication protocols used between the radio access network and the mobile stations or an excessive use, by a mobile station, of radio resources shared with other stations. mobile.
- Another aspect of the invention relates to a core network for a cellular radio communication system, comprising switches and subscriber management means, the switches being connected to at least one radio access network comprising base stations. capable of communicating by radio with mobile stations, each mobile station comprising a terminal associated with a subscriber identification module.
- the core network includes means for interrogating a mobile station through the access network to obtain an identity of the terminal of the interrogated mobile station. These interrogation means are controlled to interrogate a mobile station in order to obtain the identity of its terminal in response to the reception of an alert message identifying said mobile station.
- a third aspect of the invention relates to a radio access network for a cellular radio communication system, comprising base stations capable of communicating by radio with mobile stations and radio network controllers linked to switches of a core. network, which supervise the base stations and ensure the control of radio resources in the access network.
- This access network according to the invention comprises means for detecting malfunctions of mobile stations, for sending to the core network an alert message identifying a mobile station for which a malfunction has been detected.
- FIG. 1 is a general diagram of a radiocommunication system architecture cell according to the invention
- FIG. 2 is a diagram illustrating messages exchanged in a system according to the invention.
- FIG. 3 is a diagram showing communication protocols used in different parts of the system.
- the cellular radio system shown in Figure 1 includes a UMTS-type extended coverage cellular network.
- This cellular network, or PLMN Public Land Mobile Network
- PLMN Public Land Mobile Network
- UE User Equipment
- Each UE 30 consists of terminal equipment 31 associated with a subscriber identification module (SIM) 32.
- SIM subscriber identification module
- the SIM 32 includes a processor and a memory in which data relating to the subscriber, in particular his IMSI identity.
- Each terminal 31 also has an international mobile equipment identity (IMEI).
- IMEI international mobile equipment identity
- the access network 20, called RAN (“Radio Access Network”) comprises units called “node B” 21 distributed over the network coverage area and each comprising one or more base stations for communicating by radio (Uu interface ) with mobile stations 30.
- RAN Radio Access Network
- a base station will be assimilated to its “node B” 21.
- Radio network controllers (RNC, “Radio Network Controller”) 22 connected to the core network 10 supervise the base stations 21 through interfaces called Iub. Some RNC 22 are connected to each other through interfaces called lur.
- the access network considered here is of the UTRAN type ("UMTS
- Terrestrial RAN Terrestrial RAN
- BRAN Broadband RAN
- the core network 10 is connected to fixed networks comprising a public switched telephone network (PSTN) 8 and one or more packet transmission networks using respective protocols such as X.25 or IP ("Internet Protocol").
- PSTN public switched telephone network
- IP Internet Protocol
- packet transmission network 9 constituted by the Internet network.
- the core network 10 includes mobile service switching centers 11 (MSC, “Mobile Switching Center”), associated with visitor location registers (VLR, “Visitor Location Register”). These MSCs 11 provide circuit switching for telephone or circuit mode data transfer communications. Some MSCs serve as a gateway with fixed networks, in particular with the switched network 8. Each RNC 22 is connected to one or more MSCs 11 by an interface read.
- MSC mobile service switching centers 11
- VLR visitor location registers
- VLR Visitor Location Register
- GSN GPRS Support Node
- GGSN Gateway GSN
- GGSN Gateway GSN
- These gateways 13 are connected to the SGSN 12 to allow the UEs 30 to access the Internet.
- the MSC 11 and SGSN 12 incorporate call control units for exchanging information with the UE 30 through the RAN 20, in particular within the framework of the establishment and end of session procedures.
- the switch has the possibility of interrogating the UE so that the latter returns its IMEI to it.
- the core network 10 comprises a nominal location register 14 (HLR) communicating with the MSC ⁇ / LR, SGSN and GGSN through standardized interfaces respectively called D, Gc and Gr.
- HLR is a database, located in one or several places, containing all the data specific to PLMN subscribers, in particular their subscription parameters, mobility and their contexts, in order to allow the processing of all service requests concerning these subscribers.
- the core network 10 further comprises a faulty terminal register 15 which is a database in which the IMEIs of terminals 31 are recorded for which the access network 20 has observed malfunctions.
- This register 15 is here called CMC (“Crazy Mobile Center”).
- CMC Cym Mobile Center
- the CMC and the EIR can be located in separate network equipment or in the same equipment. In the latter case, the two databases will generally be kept separately.
- the CMC 15 can also be located in the same network equipment as the HLR 14.
- FIG. 2 The process of creating a record in the CMC 15 is illustrated in FIG. 2, the entities of the system brought into play by this process being shown in FIG. 3, in the form of logic modules applying the relevant protocols.
- MSC 11 for circuit mode or SGSN 12 for packet mode have conventionally exchanged session establishment signaling during a call control procedure, this signaling allowing the exchange to associate the EU IMSI at the open session.
- the RAN 20 When the RAN 20 detects a malfunction of the UE 30 during the session, it alerts the switch in a STATUS_REPORT message having fields containing: - the subscriber IMSI, which is known to the RNC 22;
- This STATUS_REPORT message can be integrated into the radio access network application protocol (RANAP, “Radio Access Network Application Part”), defined on the interface read ( Figure 3).
- RANAP radio access network application protocol
- Figure 3 This RANAP protocol is described in the technical specification 3G TS 25.413, version 3.1.0 published in December 1999 by 3GPP.
- the switch 11 or 12 On receipt of this STATUS_REPORT message, the switch 11 or 12 interrogates the UE (message IDENTIFICATION_REQUEST) to request its IMEI, which is returned by the UE in the response message IDENTIFICATION_RESPONSE.
- IDENTIFICATION_REQUEST and IDENTIFICATION_RESPONSE messages belong to the mobility management protocols (MM, “Mobility Management” for circuit mode and GMM, “GPRS MM” for packet mode), and are relayed transparently by the RAN 20, as shown Figure 3.
- the switch 11 or 12 then sends an update command to the database 15 (message UPDATE), supplying the IMEl and the IMSI of the mobile station 30, as well as the indications CAUSE and NSV.
- the UPDATE message is acknowledged and a record is created in the database 15 with the IMEI, IMSI, CAUSE and NSV data.
- This UPDATE message can be integrated into the mobility application protocol (MAP, “Mobile Application Part”) described in the technical specification 3G TS 29.002, version 3.4.0 published in April 1999 by 3GPP.
- MAP mobility application protocol
- the interface F 'between the MSC and the CMC can consist of the standardized interface F between the MSC and the EIR
- the interface Gf between the SGSN and the CMC may consist of the standardized Gf interface between the SGSN and the EIR. Otherwise, these interfaces F 'and Gf' can be produced in a similar manner to the standardized interfaces F and Gf.
- the management of the CMC 15 database by the cellular network operator can include one or more of the following actions:
- SMS Short Message Service
- the switch queries the UE again to verify that there is still the same IMEI / IMSI association. Otherwise, the warning message is not sent. 2 / prevent the UE whose terminal is registered in the database 15 from communicating via the RAN 20.
- the switch can also register the IMEl of the defective terminal in the HLR 14, in conjunction with the IMSI appearing in the database 15.
- the MSC or SGSN interrogates the UE to obtain its IMEI and to determine whether the subscriber is still using his faulty terminal identified in the HLR. If so, the service may be refused.
- actions can be selected or modulated according to the CAUSE and / or NSV parameters found in the records, or according to the number of records of which a given IMEI has been the subject of in the CMC 15.
- the reception of the message ID_RESPONSE by the switch triggers the recording in the HLR of the IMEl of the defective terminal in relation to the associated IMSI.
- the HLR will ask switch 11 or 12 to interrogate this UE in order to to get his IMEI.
- the IMEl thus recovered is compared to that stored in the HLR, and in the event of a match, one of actions 1 / and 2 / above can be performed, namely to warn the subscriber that he is using a terminal whose the network has detected malfunctions or rejected the registration request to prevent the EU from communicating via the RAN 20.
- a malfunction of mobile terminals which is of particular importance for cellular operators is that of excessive transmission power. This problem can indeed disrupt communications involving other subscribers.
- UMTS standards provide for regulation of the transmit power of terminals, but a faulty terminal may not follow this regulation.
- Such a malfunction is detectable in the access network 20 from the power control loops.
- This power control is supervised by the RNC 22 module which is responsible for the radio resource control protocol (RRC, "Radio
- the node B evaluates whether the signal-to-interferer ratio (SIR, “Signal- to-lnterferer
- Ratio measured by the channel equalizer in the physical layer (PHY), is higher or lower than the SIR target setpoint, and therefore commands the UE to decrease or increase its transmit power (see technical specification 3G TS 25.214, version 3.1.1 published in December 1999 by the 3GPP).
- This regulation between node B and the UE is called an internal loop. It is relatively fast since the UE can take into account a command to decrease or increase power every 0.666 ms.
- the values of SIR estimated by node B 21 are fed back to RNC 22 which uses them to adjust the value of SIR target in a slower external loop (technical specification 3G TS 25.331 on the RRC layer, version 3.2.0 published in March 2000 by 3GPP).
- the UTRAN 20 uses a code division multiple access (CDMA) technique, according to which a communication channel between a base station 21 and a mobile station 30 is defined by a code d spreading modulating the sequence of information symbols to be transmitted.
- CDMA code division multiple access
- the orthogonality of the different spreading codes allows the receiver to extract the signal intended for it.
- Power control is performed code by code.
- the measurements made by the UEs and the B nodes are detailed in the technical specification 3G TS 25.215, version 3.2.0 published in March by the 3GPP:
- the UTRAN_code_power parameter measured by node B, represents the power transmitted by the base station to the EU on a given code.
- the RRC protocol allows the RNC to have this measurement transmitted;
- the parameter CPICH_RSCP measured by the UE, represents the power received by the UE from the base station on a pilot code.
- the RRC protocol allows the RNC to have this measurement transmitted;
- the RRC protocol also allows the RNC to have this measurement transmitted;
- the RSCP (“Received Signal Code Power”) parameter measured by node B, represents the power received by the base station from the UE on a code
- the ISCP (“Interference Signal Code Power”) parameter measured by node B, represents the interference power received by the base station on a code.
- the RSCP and ISCP powers are measured by node B, but are not reported to the RNC (the value reported in the external loop is the SIR, given by (RSCP / ISCP) ⁇ SF, where
- SF is the channel spreading factor.
- Iub interface 3G TS 25.433 technical specification, version 3.1.0 published in December 1999 by the 3GPP
- node B also upgrades the RSCP and ISCP powers.
- a corresponding modification can be made on the lur interface in the case where the node B serving the terminal is not directly connected to the RNC where the RRC task (SRNC) is executed.
- PE ' UE_TX_power that the UE transmits to it in the RRC layer.
- the RNC can estimate the transmit power control bits (TPC, “Transmit Power Control”) which are supplied by node B to the EU. By filtering these TPC bits, the RNC 22 can determine whether node B is in a phase where it requests the terminal to decrease or increase its transmission power, on average. By observing the evolution of the parameter PE (or PE ') and by comparing it with the estimated TPC bits, possibly filtered, the RRC layer can detect terminals which do not respond adequately to power control.
- TPC transmit Power control bits
- the RNC can diagnose that the power regulation is not working well in the terminal.
- node B could send the RSCP parameter and the TPC bits supplied to the UE back to the RNC (or a filtered value of these TPC bits).
- the above detection proceeds by combining the TPC bits estimated for the different stations.
- a malfunction can thus be diagnosed if the UE receives for a certain time from each of the base stations the instruction to lower its transmission power and if nevertheless the estimated transmission power PE does not decrease or continues to increase.
- the decision to classify a defective terminal in terms of transmission power could also be taken at the level of nodes B.
- the terminal may have problems in the implementation of one or more of the protocols used on the Uu interface, such as the layer 2 protocols RLC ("Radio Link Control") and MAC ("Medium Access Control”) ). These protocols are respectively described in the technical specifications 3G TS 25.322, version 3.2.0 and 3G TS 25.321, version 3.3.0 published in March 2000 by 3GPP.
- the RNC 22 which comprises the RLC and MAC modules in relation to those present in the UE 30 (FIG. 3), can detect protocol errors such as for example erroneous formats in the protocol data units (PDU) transmitted by the EU.
- PDU protocol data units
- Protocol errors can also be detected in the RRC protocol. For example, a faulty terminal may ignore or misinterpret instructions from the RNC to adopt given states or configurations. The RNC will then note the inability of the EU to behave in accordance with the expected state. The RNC can still detect UEs which make excessive use of radio resources shared with other mobile stations, such as for example common channels provided for random network accesses.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001270674A AU2001270674A1 (en) | 2000-06-30 | 2001-06-27 | Cellular radiocommunication system with means for locating faulty terminals |
US10/312,933 US20040038678A1 (en) | 2000-06-30 | 2001-06-27 | Cellular radiocommunication system with means for locating faulty terminals |
EP01949543A EP1295496A1 (fr) | 2000-06-30 | 2001-06-27 | Systeme de radiocommunication cellulaire avec des moyens de reperage de terminaux defectueux |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0008486A FR2811191B1 (fr) | 2000-06-30 | 2000-06-30 | Systeme de radiocommunication cellulaire avec reperage de terminaux deffectueux |
FR00/08486 | 2000-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002001899A1 true WO2002001899A1 (fr) | 2002-01-03 |
Family
ID=8851937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/002036 WO2002001899A1 (fr) | 2000-06-30 | 2001-06-27 | Systeme de radiocommunication cellulaire avec des moyens de reperage de terminaux defectueux |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040038678A1 (fr) |
EP (1) | EP1295496A1 (fr) |
AU (1) | AU2001270674A1 (fr) |
FR (1) | FR2811191B1 (fr) |
WO (1) | WO2002001899A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1271978A2 (fr) * | 2001-06-28 | 2003-01-02 | Nec Corporation | Système et procédé AMRC pour détecter un appareil mobile défectueux |
US8554202B1 (en) | 2012-05-04 | 2013-10-08 | Telefonaktiebolaget L M Ericsson (Publ) | Faulty wireless terminal detection |
US8838093B2 (en) | 2012-05-04 | 2014-09-16 | Telefonaktiebolaget L M Ericsson (Publ) | Method and device for monitoring wireless terminal behavior according to terminal type |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1525765A1 (fr) * | 2002-06-25 | 2005-04-27 | Nokia Corporation | Procede de routage et element de reseau |
GB2421149A (en) * | 2004-12-08 | 2006-06-14 | Vodafone Ltd | Maintaining a level of performance in a mobile telecommunications system |
CN100373976C (zh) * | 2005-10-14 | 2008-03-05 | 华为技术有限公司 | 在设备管理中处理失败任务的方法及装置 |
CN101304548B (zh) * | 2007-05-08 | 2012-11-28 | 中国移动通信集团公司 | 多媒体广播/组播业务数据传输系统、方法及终端 |
US20110170404A1 (en) * | 2008-09-26 | 2011-07-14 | Arne Nordin | Mobile communication network |
EP2659700B1 (fr) * | 2010-12-28 | 2018-04-11 | Telefonaktiebolaget LM Ericsson (publ) | Procédé et dispositif de détection d'un terminal défectueux |
DE102017204739A1 (de) * | 2017-03-21 | 2018-09-27 | Continental Automotive Gmbh | Verfahren zum Testen eines Fahrzeug-zu-X-Kommunikationsmoduls, Fahrzeug-zu-X-Kommunikationsmodul und Diagnosegerät |
Citations (3)
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US5706333A (en) * | 1995-02-24 | 1998-01-06 | Teradyne, Inc. | Method and apparatus for analyzing cellular telephone network |
JPH10303804A (ja) * | 1997-04-24 | 1998-11-13 | Saitama Nippon Denki Kk | 故障移動局の強制切断方法 |
WO1999044381A1 (fr) * | 1998-02-27 | 1999-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Systeme et procede d'identification d'une station mobile en dysfonctionnement et station mobile utilisee a cet effet |
Family Cites Families (2)
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FI104608B (fi) * | 1997-01-07 | 2000-02-29 | Nokia Networks Oy | Tilaajatietojen käsittely verkkokohtaisten lisäpalveluiden yhteydessä |
JP3459866B2 (ja) * | 1997-04-22 | 2003-10-27 | 埼玉日本電気株式会社 | 符号分割多元接続方式の送信電力制御方法 |
-
2000
- 2000-06-30 FR FR0008486A patent/FR2811191B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-27 EP EP01949543A patent/EP1295496A1/fr not_active Ceased
- 2001-06-27 WO PCT/FR2001/002036 patent/WO2002001899A1/fr not_active Application Discontinuation
- 2001-06-27 US US10/312,933 patent/US20040038678A1/en not_active Abandoned
- 2001-06-27 AU AU2001270674A patent/AU2001270674A1/en not_active Abandoned
Patent Citations (4)
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US5706333A (en) * | 1995-02-24 | 1998-01-06 | Teradyne, Inc. | Method and apparatus for analyzing cellular telephone network |
JPH10303804A (ja) * | 1997-04-24 | 1998-11-13 | Saitama Nippon Denki Kk | 故障移動局の強制切断方法 |
US6128507A (en) * | 1997-04-24 | 2000-10-03 | Nec Corporation | Method for forcibly disconnecting failure mobile station from cellular mobile communication network |
WO1999044381A1 (fr) * | 1998-02-27 | 1999-09-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Systeme et procede d'identification d'une station mobile en dysfonctionnement et station mobile utilisee a cet effet |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1271978A2 (fr) * | 2001-06-28 | 2003-01-02 | Nec Corporation | Système et procédé AMRC pour détecter un appareil mobile défectueux |
EP1271978A3 (fr) * | 2001-06-28 | 2004-02-04 | Nec Corporation | Système et procédé AMRC pour détecter un appareil mobile défectueux |
US8554202B1 (en) | 2012-05-04 | 2013-10-08 | Telefonaktiebolaget L M Ericsson (Publ) | Faulty wireless terminal detection |
US8838093B2 (en) | 2012-05-04 | 2014-09-16 | Telefonaktiebolaget L M Ericsson (Publ) | Method and device for monitoring wireless terminal behavior according to terminal type |
Also Published As
Publication number | Publication date |
---|---|
EP1295496A1 (fr) | 2003-03-26 |
US20040038678A1 (en) | 2004-02-26 |
FR2811191B1 (fr) | 2003-01-10 |
AU2001270674A1 (en) | 2002-01-08 |
FR2811191A1 (fr) | 2002-01-04 |
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