WO2011064150A1 - Module de téléphonie mobile et procédé de détermination d'une cellule comme appropriée - Google Patents
Module de téléphonie mobile et procédé de détermination d'une cellule comme appropriée Download PDFInfo
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- WO2011064150A1 WO2011064150A1 PCT/EP2010/067845 EP2010067845W WO2011064150A1 WO 2011064150 A1 WO2011064150 A1 WO 2011064150A1 EP 2010067845 W EP2010067845 W EP 2010067845W WO 2011064150 A1 WO2011064150 A1 WO 2011064150A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
Definitions
- Mobile telephony module and method of determining a cell as appropriate.
- the present invention relates to the field of mobile telephony and more particularly the field of so-called machine-to-machine communication modules. However, it can apply to any wireless telephone communication device.
- wireless telephone communication devices Initially, in cellular mobile telephone networks, wireless telephone communication devices consisted of simple handsets for transmitting voice over a cellular radio network, the voice being transmitted by an circuit switched service. Very quickly, the simple voice transport proved to be insufficient, and the terminals were equipped with data communication means according to packet-switched protocols such as the IP protocol ⁇ Internet Protocol in English defined by RFC 791). These developments have resulted in different generations of communication standards such as General Packet Radio Service (GPRS), Enhanced Data Rates for GPRS Evolution (EDGE), and Universal Mobile Telecommunications (UMTS). System in English), High Speed Uplink Packet Access (HSUPA).
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GPRS Evolution
- UMTS Universal Mobile Telecommunications
- HSUPA High Speed Uplink Packet Access
- the packet-switched service is carried out by the GPRS subsystem, GPRS designating according to the context, the packet mode, or else forms of encoding and modulation (CS1..4, GMSK) of the symbols on the radio channel.
- EDGE is a form of packet mode that is distinguished from GPRS only by encoding and modulation (MCS 1..9, 8-PSK) of the different radio channel data, the entire protocol stack over the radio channel is identical. Also, unless otherwise indicated, GPRS will designate the packet-switched service regardless of GSM based radio access technology.
- GSM networks provide basic circuit-switched service
- the packet-switched service is dynamic.
- the network operator can activate it in some cells only, or disable it at certain times of the day to free resources, including radio, for circuit-switched service. This operation is well suited to a conventional mobile phone use by a human being.
- the GSM standards provide for a selection of the base station to which the mobile connects based on the quality of the circuit-switched service. These mechanisms do not take into account the availability or characteristics of the packet-switched service.
- GSM networks are increasingly being used in a so-called machine-to-machine context.
- equipment is provided with a GSM communication module that they use to communicate with other equipment or central services.
- the GSM communication module is then managed and controlled by an application and no longer by a human user.
- These applications have specific communication needs which must imperatively be satisfied for a good functioning of the application. Although some of these applications may use circuit-switched service, it is generally important that the packet-switched service is operational. In addition, certain characteristics of this packet-switched service may be necessary for the proper functioning of the application.
- the mobile communication module of a system connects to a cell that does not have a packet-switched service having all the characteristics necessary for the application. And this is even more so if such a cell is available in the environment of the communication module.
- the invention aims to solve the above problems by a cell selection method adapted to take into account one or more criteria relating to the characteristics of the packet switching service offered by the cell.
- these criteria are also integrated in the process of re-selecting a cell while the module is already connected to a first cell.
- the use of the method according to the invention makes it possible to ensure that the communication module firstly connects to the cells offering a packet switching service fulfilling the criteria defined by the application for its proper functioning.
- a method of determining a cell as appropriate by a wireless communication module within a cellular mobile network providing a circuit-switched communication service and a packet-switched communication service comprising a test step of the network to which the cell belongs; a test step that the cell is not prohibited; a test step that the location area is not prohibited; a step of testing the quality of the radio channel, in this case the loss of the radio path and a step of testing at least one criterion relating to the characteristics of the packet-switched service offered by the cell.
- the method comprises a step of testing the support of a PBCCH channel by the cell.
- the method comprises a step of testing the support of the EDGE by the cell.
- the method includes a step of testing the operating mode of the network used by the cell.
- the method comprises a step of testing the support of the CCN notifications by the cell.
- the invention also relates to a method for selecting a cell by a wireless communication module within a cellular mobile telephone network providing a circuit-switched communication service and a packet-switched communication service characterized in that it comprises a step of excluding the cells determined as non-appropriate as indicated above.
- the method comprises a step of priority selection of the cells determined as appropriate, as indicated above.
- the invention also relates to a method for re-selecting a cell by a wireless communication module within a cellular mobile telephone network providing a circuit-switched communication service and a packet-switched communication service. characterized in that it comprises a step of triggering a cell re-selection when the cell ceases to be determined as appropriate as indicated above.
- the method comprises a step of testing the quality of the transmission of the control RLC blocks in reception during a transfer in packet switching mode.
- the invention also relates to a wireless communication module within a cellular mobile telephone network providing a circuit-switched communication service and a packet-switched communication service comprising for determining a cell as appropriate test means of the network to which the cell belongs; test means that the cell is not prohibited; test means that the location area is not prohibited; means for testing the quality of the radio channel, in this case the loss of the radio path and means for testing at least one criterion relating to the characteristics of the packet-switched service offered by the cell.
- the module comprises means for the application that controls it to specify a set of criteria relating to the characteristics of the packet-switched service.
- Fig. 1 illustrates the general operating architecture of a machine - to - machine communication
- Fig. 2 illustrates an example of connection to a packet-switched service
- Fig. 3 illustrates the flowchart of determining a cell as appropriate in an exemplary embodiment of the invention.
- the context of machine-to-machine communication is a context in which information processing equipment must communicate with a service without being under the direct control of a user. It may be, for example, a payment terminal that communicates with the servers of his bank, an automatic ticket withdrawal ATM, an automobile, an alarm system or even a meter such as gas or electricity meters for remote readings.
- the Fi g. 1 illustrates the general operating architecture of a machine-to-machine communication.
- a device 1.1 comprises a GSM communication module 1.2.
- the equipment is surrounded by a set of base stations 1.3, 1.4, accessible by radio. Each of these stations defines a GSM cell.
- the GSM module 1.2 selects one of these cells and connects, for example to the base station 1.4.
- this base station offers a packet-switched service, in this case GPRS.
- This service has a connection with a packet communication network 1.5, typically Internet.
- the communication module is then able to use this packet switching service to connect to a remote machine 1 .6, itself connected to the communication network 1.5.
- the equipment 1 .1 typically includes an information processing device for executing an application that manages the service for which the equipment was designed.
- This application has communication needs for which it uses the GSM communication module. These needs are dependent on each application.
- This application is named machine-to-machine application in the rest of this text. It is she who defines the needs and who manages the communication module.
- a machine-to-machine application typically requires data exchanges using the packet-switched service, but it may also require the joint or independent use of the circuit-switched service.
- Most of the existing modules offer both services, but usually not simultaneously. They are called GPRS class B in the document 3GPP TS 22.060: "General Packet Radio Service (GPRS); Service Description; Stagel”.
- GPRS General Packet Radio Service
- the equipment generally communicates with the communication module via a serial link, such as RS-232 or USB, or even Bluetooth, with standardized or proprietary AT commands.
- the standard used is described in document 3GPP TS 27.007: "AT command set for User Equipment (UE)".
- Each cell of a GSM network transmits on a main frequency, the beacon frequency of its own, information intended for mobile devices, it is the beacon channel composed of the FCCH (Frequency Correction Channel), the SCH channel (Synchronization Channel in English). This information includes a synchronization code. Specific information is also transmitted on the BCCH channel (Broadcast Control Channel), including the network number, the radio criteria, C 1 and C 2, the selection of the cell according to the received power, GPRS information if the cell makes GPRS, a forbidden cell indicator and a list of neighboring cell beacon frequencies. This information is transmitted in the form of blocks of information called SI (System Information in English).
- SI System Information in English
- PBCCH Packet Broadcast Control Channel
- SU 3 the information block
- the PBCCH is organized to broadcast information, including the presence of additional channels allowing the module to be notified of the arrival of a GSM call in circuit switching mode while a communication in packet switching mode is in progress.
- new radio criteria are defined such that C31 and C32 replace C2, the criterion C l is retained.
- the information disseminated by the PBCCH is formed as information BCCH information blocks called PSI (Packet System Information in English). This information is found in 3GPP TS 44.060: "MS-BSS RLC / MAC Protocol Interface”.
- a cell may offer a GPRS packet-switched service without offering a PBCCH channel, but the benefits of the broadcasted information disappear.
- the packet-switched service is a dynamic service.
- the network can modify the characteristics of this service at any time, or even delete it.
- the information broadcast on the BCCH and PBCCH channels is then modified accordingly. These changes are signaled by the positioning of binary flags in these channels, the Change Mark bits.
- Access to the services of a GSM network requires a subscription from the network operator. This subscription also sets roaming conditions for other networks. The necessary information is stored in the SIM card associated with this subscription and used by the module for access to the network.
- Using network services requires you to select a cell to connect to. This cell selection process consists of searching for this network on the radio channel and then registering with it.
- the registration procedure is described in 3GPP TS 23.122: "NAS Functions related to Mobile Station (MS) in idle mode" and can be automatic, the module chooses itself the network according to the defined criteria, or manually. In this case, the module presents the user or application with a list of currently available networks, dependent on the user or the application to choose the desired network.
- the registration procedure may relate separately to the circuit-switched service and the packet-switched service, or both in combination. In order to use the packet-switched service, in this case GPRS, the module must be "attached" to the GPRS service in the network.
- the cells detected in the radio environment are first sorted in order of priority of their network in accordance with the standard, then according to the criterion C1 calculated by the module.
- the module starts with the group whose network is of highest priority and searches for the appropriate cell of best criterion C1. If there is no appropriate cell in this group, it goes to the next network group, otherwise it will camp on the found cell and start the registration procedure.
- a step of testing the quality of the radio channel in this case the loss of the radio path.
- the module searches for networks on the radio channel and displays the ones it has found in network priority order.
- the module checks continuously, that it is on the best cell at the level of the received radio power, and that this one is always appropriate. If this is no longer the case, and it is in idle mode, that is to say it is not in communication whether by circuit or packet switching, it triggers the cell re-selection procedure.
- the complete list of criteria for triggering a re-selection is given in 3GPP TS 03:22: "Functions related to Mobile Station (MS) in idle mode and group receive mode" clause 4.5.
- the module In the case where no cell is appropriate, the module considers that it has lost contact with the network and goes back in search of network.
- the module When the module is in GPRS transfer, then, in certain network configurations called NCO0 and NCO1 in the standard, the module is autonomous in the selection of cells, but in other configurations such as NC02, it changes cell according to the network instructions, which are usually decided on the basis of the power measurement and radio quality reports reported by the module.
- the complete list of beacon frequencies of the neighboring cells maintained by the module is composed of the list provided on the beacon channel of the cell to which the module is connected and possibly of cells added or removed in network messages as described in the document 3GPP TS 44.:60: "MS-BSS RLC / MAC Protocol Interface".
- the module regularly measures the average power of the frequencies of this list. When the network requests it, the module sends the result of the measurements of the six strongest neighboring cells. When attached to GPRS, unlike GSM attachment alone, the module is not required to decode the information channels of the six closest neighboring cells.
- the radio criterion C 1 is calculated as a function of the radio powers received and the maximum radio power that can be emitted according to a formulation described in document 3GPP TS 45: 008: "Radio subsystem link control". It should be noted that this criterion is expressed differently depending on whether one is in an initial cell selection phase or in a re-selection phase.
- these blocks are transmitted using a modulation scheme. It is possible to use several modulation schemes, which are distinguished by the robustness vis-à-vis the disturbances of the radio channel and the bandwidth they allow. The more robust the modulation scheme, the lower the bandwidth allowed. An adaptation is made permanently to choose the best modulation scheme according to the current quality of the radio channel. At any time, we choose the modulation scheme for the best bandwidth. But this choice only affects the data blocks. In order to ensure their good transmission in all cases, the control blocks are always transmitted according to the most robust scheme called CS 1.
- NMO Network Mode Operation
- the module On a network operating in the NMO mode l, the module is notified of the arrival of a call on the circuit-switched service, whether inactive or in data transfer on the packet-switched circuit.
- the module may sometimes miss calls on the circuit-switched service even when it is idle.
- the NMO is broadcast in the SI 13 if the cell does not have PBCCH and in the PSI13 if it has a PBCCH.
- a first step 2.1 it ensures that the module is registered on a network. Otherwise, a network search is initiated. Then, if necessary, it proceeds in a step 2.2 to an attachment of the module to the packet switching service. It then configures the Packet Data Network (PDP) context which contains the information needed to establish a communication session, in step 2.3. Then, the application establishes a point-to-point link, that is to say PPP (Point to Point Protocol), between itself and the module, this is step 2.4. This property activates the PDP context.
- the PPP link provides an IP (Internet Protocol) address to the application and an IP address to the module.
- the PDP context is data shared between the module and the GPRS network.
- the module retransmits this IP address via PPP to the application.
- This IP address is used in the User Datagram Protocol (UDP) or TCP ⁇ Transfer Control Protocol (English)) communications with another application, which is in principle external to the GPRS network.
- UDP User Datagram Protocol
- TCP ⁇ Transfer Control Protocol English
- GPRS networks disable the PDP context after a while, and sometimes they also force GPRS detachment.
- the availability of the packet-switched service is not a criterion for selecting the cell.
- the module can choose an authorized cell for the best radio reception, but does not offer GPRS, even if the application is running, the equipment requires access to the packet-switched service for its operation. Even if the selected cell would have the service, the application might require some service features that would not be available. None in the current standard makes it possible to prioritize cells offering a packet-switched service whose characteristics correspond to the expectations of the application.
- These expectations may, for example, include the existence of a PBCCH channel, an appropriate NMO network operation mode in the case where the application requires the combined use of the packet-switched service and the circuit-switched service. .
- Recent versions of the 3GPP standard introduce roaming (packet handover in English), to change cells during GPRS transfer when the radio quality is too degraded, but few networks and modules are likely to implement it.
- the parameter RXLEV ACCESS MIN broadcast by the cell and set by the operator can be set too low to have a good quality of GPRS reception necessary for the application executed by the TE.
- the invention proposes a GSM communication module that provides the means for the application that controls it to specify a set of desired criteria relating to the characteristics of the packet-switched service offered by the cell.
- This set of criteria can be taken into account by the module at different levels. It can take them into account in the process of initial selection of a cell to connect to. It can also take them into account in the process of reselection of a new cell as well as in the monitoring process of neighboring cells.
- each of the criteria is broken down into a priority criterion and an exclusion criterion. According to the priority criterion, the priority is given to the cells exhibiting said criterion.
- each criterion has a default value used when the criterion is not specified by the application.
- modules according to the invention operate within the framework of the existing network.
- the means for controlling the various criteria offered by the module consists of an additional specific AT command.
- the application can use this command to specify the criteria it wants to use.
- Any other means of communication can be used depending on the communication mode adopted between the application and the module.
- the means of control offered makes it possible to indicate to the module a list of criteria to be applied for the search, the selection or the re-selection of cells.
- the criteria relate to the information provided from the BCCH or PBCCH channel if it is present. Criteria include the presence of PBCCH, EDGE support, Network Operation Mode (NMO) and ACTIVE CCN (Cell Congestion Notification) support. Other criteria can be used. Concerning the presence of the PBCCH channel, a priority criterion is defined. If this criterion is activated, the cells presenting a PBCCH channel are favored during the selection or re-selection operations. If the criterion is inactive, the presence of a PBCCH channel is not used. In the absence of indication, by default, the module favors cells with a PBCCH channel. An exclusion criterion is also defined to exclude cells that do not have support from a PBCCH channel. By default, all cells are accepted independently of the support of a PBCCH channel.
- the priority criterion makes it possible to favor cells by offering support.
- the support of the EDGE is indifferent.
- the exclusion criterion makes it possible to discard cells that do not support EDGE. By default, cells without EDGE are accepted.
- a criterion makes it possible to prioritize the different modes.
- the cells operating according to the NMO1 mode take precedence over the cells operating in the NM02 mode which are themselves priority on the cells operating according to the NM03 mode.
- a criterion is used to exclude cells that do not operate in a specified mode. By default, all modes are accepted.
- a priority criterion makes it possible to favor the cells offering the support of the CCN.
- cells offering support for CCN are not supported.
- One criterion excludes cells that do not offer SCC support.
- a criterion also modifies the received power threshold values for circuit switched and packet switched services. These thresholds are called APP_RXLEV_ACCESS_MIN and
- these thresholds can not receive negative values to avoid the selection of cells whose received power would be too low. By default, these thresholds are set to 0.
- GPRS RLC RXQU AL MIN its default value is 7.
- the radio quality calculation for the transmission of the control RLC blocks is done on several RLC blocks.
- a criterion is provided allowing the application to modify this number called GPRS RLC RXQUAL NB which is 104 by default.
- Fig. 3 describes the method for determining such a cell according to the embodiment of the invention. According to this method, the presence of GPRS, the support of the PBCCH channel, the support of the EDGE, the operating mode of the network and the support of the CCN are successively determined.
- Fig. 3 consists of the flowcharts of FIGS. 3a, 3b and 3c, the labels A and B making the links between the different sub figures.
- step 3.1 When a cell is determined to be appropriate according to the standard, step 3.1, a step of reading information blocks SI3 and SI4 of the BCCH channel occurs, step 3.2. It is then determined whether the GPRS support is indicated by these information blocks, step 3.3. In the negative case, the cell is declared as inappropriate for GPRS. In the positive assumption, one read the block of the channel 13 of the BCCH channel, step 3.4. The support of a PBCCH channel is then determined by the cell, step 3.5. In the negative hypothesis, it is tested whether the support of the PBCCH channel is an exclusion criterion, step 3.6. In the positive hypothesis, the cell is declared as inappropriate for GPRS.
- the GPRS information is decoded in the SI block 13 of the BCCH channel, step 3.8. If the PBCCH channel is supported, the PSI information block 13 is read on this channel, step 3.17, and the GPRS information is then decoded in this block, step 3.9. Following these decoding steps, 3.8 and 3.9, we go to FIG. 3b. We then test the support of the EDGE, step 3.10. If the EDGE is not supported, we test if this medium is an exclusion criterion, step 3.11. If this is the case, the cell is declared unsuitable for GPRS.
- the EDGE In the case where the EDGE is supported or if it is not an exclusion criterion, it is tested whether the cell operates according to the network operation mode NMO l, step 3.12. If this test is negative, we test if the NMOl mode is an exclusion criterion, step 3.13. If yes, the cell is declared as not appropriate for GPRS, otherwise it goes to label B. If the cell does not operate in the NMOl mode, the NM02 mode is tested in the same way, steps 3.14 and 3.15. And if the NM02 mode is also not the mode of operation of the cell, it operates according to the NM03 mode whose exclusion is tested, step 3.16. Fig.
- 3c shows what happens once it has been determined that the cell is operating in a non-excluded mode of operation.
- the support of the CCN notification is then tested, step 3.17. If this support is missing and this medium is an exclusion criterion, step 3.18, it is declared that the cell is not appropriate for the GPRS. Otherwise, the CCN notification is supported or is not an exclusion criterion, the cell is determined to be appropriate for GPRS.
- the module includes a step of calculating the quality of the transmission of the control RLC blocks in reception during a transfer in packet switching mode.
- These blocks are always transmitted according to a modulation scheme called CS l robust and are therefore not subject to changes in modulation scheme.
- this quality calculation is the average of the quality measurements on a set of control RLC blocks received.
- the number of intervening blocks being fixed by a parameter, GPRS RLC RXQUAL NB, which can be modified by the application.
- this calculation is reset. When this quality falls below a threshold, a cell reselection step is triggered.
- the standard cell search procedure is adapted to search for a suitable GPRS cell and not a suitable cell in the sense of the standard.
- the cells are sorted according to the priority of the network when cells belonging to several networks are present.
- the cells are finally sorted within the subsets thus obtained as a function of the criterion C1, potentially modified by the application, in descending order of this criterion.
- This method consists in monitoring the six strongest cells of a list of neighboring cells. It then goes back to the network its measurement report of the received powers.
- this method is modified to integrate a step of reading the BCCH and possibly PBCCH channels of these cells, in order to verify the exclusion criteria described above. The method then incorporates a step of removing the non-appropriate GPRS cells thus determined. It also incorporates a step of inserting as many cells appropriate for GPRS among the strongest subject to availability.
- a module according to the invention triggers a re-selection also on the following events:
- the module disconnects from the current cell and tries to select a new cell.
- the invention thus described makes it possible to better take into account the communication requirements of an application. It applies to any GSM communication module used in information processing equipment. It can also be used in a simple mobile phone, particularly a so-called smart phone (smartphone in English) likely to host applications requiring communication type machine to machine.
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Abstract
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800533383A CN102648651A (zh) | 2009-11-24 | 2010-11-19 | 移动电话模块和确定小区为适当小区的方法 |
BR112012012402A BR112012012402A2 (pt) | 2009-11-24 | 2010-11-19 | módulo de telefonia móvel e método de determinação de uma célula como apropriada |
EP10781499A EP2505023A1 (fr) | 2009-11-24 | 2010-11-19 | Module de téléphonie mobile et procédé de détermination d'une cellule comme appropriée |
US13/511,524 US8805357B2 (en) | 2009-11-24 | 2010-11-19 | Mobile telephony module and method for determining a cell as being appropriate |
RU2012125198/08A RU2574816C2 (ru) | 2009-11-24 | 2010-11-19 | Мобильный телефонный модуль и способ определения подходящей соты |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0958328A FR2953083B1 (fr) | 2009-11-24 | 2009-11-24 | Module de telephonie mobile et procede de determination d'une cellule comme appropriee. |
FR09/58328 | 2009-11-24 |
Publications (1)
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WO2011064150A1 true WO2011064150A1 (fr) | 2011-06-03 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP2010/067845 WO2011064150A1 (fr) | 2009-11-24 | 2010-11-19 | Module de téléphonie mobile et procédé de détermination d'une cellule comme appropriée |
Country Status (6)
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US (1) | US8805357B2 (fr) |
EP (1) | EP2505023A1 (fr) |
CN (1) | CN102648651A (fr) |
BR (1) | BR112012012402A2 (fr) |
FR (1) | FR2953083B1 (fr) |
WO (1) | WO2011064150A1 (fr) |
Families Citing this family (1)
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EP2557842B1 (fr) * | 2011-08-10 | 2018-05-23 | Alcatel Lucent | Resélection de cellules autonome par un équipement d'utilisateur |
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WO2000041425A1 (fr) * | 1998-12-31 | 2000-07-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Recuperation d'informations cellule dans un reseau de radiotelecommunication superpose a commutation par circuits et par paquets |
WO2002098071A1 (fr) * | 2001-05-28 | 2002-12-05 | Nokia Corporation | Transmission de parametres d'etablissement de connexions dans un reseau de donnees par paquets |
WO2007144029A1 (fr) * | 2006-06-16 | 2007-12-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Mécanisme de sélection/resélection de cellules pour un système de communication mobile |
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DE19614285C2 (de) | 1996-04-11 | 1998-11-12 | Siemens Ag | Verfahren zur Erkennung von Ziffernfolgen |
FR2774842B1 (fr) * | 1998-02-06 | 2000-03-03 | Alsthom Cge Alcatel | Procede de selection de cellule dans un systeme cellulaire de radiocommunications mobiles |
FI106768B (fi) * | 1998-05-20 | 2001-03-30 | Nokia Networks Oy | Solunvalinta pakettiverkossa |
US6631259B2 (en) * | 2000-03-31 | 2003-10-07 | Motorola, Inc. | Method for enabling receipt of a packet-switched page by a mobile station |
US7633927B2 (en) * | 2003-01-31 | 2009-12-15 | Nokia Corporation | System and method for extending neighboring cell search window |
US7016342B2 (en) * | 2004-01-23 | 2006-03-21 | Nokia Corporation | Enhancement of dual transfer mode when circuit switched resources are released |
CN100407855C (zh) * | 2004-07-28 | 2008-07-30 | 华为技术有限公司 | 一种cdma***中终端选择网络的方法 |
US8072933B2 (en) * | 2005-03-30 | 2011-12-06 | Nokia Corporation | Combined handover of the circuit-switched (CS) and packet-switched (PS) resources |
MY151289A (en) * | 2007-09-26 | 2014-04-30 | Ericsson Telefon Ab L M | Selecting a cell associated with a radio access technology |
KR101452497B1 (ko) * | 2008-05-22 | 2014-10-21 | 엘지전자 주식회사 | Gsm/gprs 시스템에서 셀 탐색 방법 |
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2009
- 2009-11-24 FR FR0958328A patent/FR2953083B1/fr not_active Expired - Fee Related
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2010
- 2010-11-19 BR BR112012012402A patent/BR112012012402A2/pt not_active Application Discontinuation
- 2010-11-19 US US13/511,524 patent/US8805357B2/en not_active Expired - Fee Related
- 2010-11-19 WO PCT/EP2010/067845 patent/WO2011064150A1/fr active Application Filing
- 2010-11-19 EP EP10781499A patent/EP2505023A1/fr not_active Withdrawn
- 2010-11-19 CN CN2010800533383A patent/CN102648651A/zh active Pending
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Also Published As
Publication number | Publication date |
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US8805357B2 (en) | 2014-08-12 |
FR2953083B1 (fr) | 2011-12-23 |
EP2505023A1 (fr) | 2012-10-03 |
BR112012012402A2 (pt) | 2016-04-12 |
CN102648651A (zh) | 2012-08-22 |
RU2012125198A (ru) | 2013-12-27 |
US20120289223A1 (en) | 2012-11-15 |
FR2953083A1 (fr) | 2011-05-27 |
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