GB2232850A - Electronic test equipment - Google Patents
Electronic test equipment Download PDFInfo
- Publication number
- GB2232850A GB2232850A GB8922207A GB8922207A GB2232850A GB 2232850 A GB2232850 A GB 2232850A GB 8922207 A GB8922207 A GB 8922207A GB 8922207 A GB8922207 A GB 8922207A GB 2232850 A GB2232850 A GB 2232850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- test
- mobile unit
- diagnostic
- functions
- 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
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Diagnostic test apparatus for a cellular communications system mobile transmitter/receiver unit, which apparatus is adapted for direct connection to the aerial connection of an mobile unit (4) of the system whilst installed in a vehicle, and which is arranged to simulate a land/base station of the system in such manner that when in operation the diagnostics unit appears to the mobile unit as a land/base station of the system. The diagnostic test apparatus includes means for producing any of a plurality of signals and/or functions for simulating corresponding signals and/or functions involved in the system, and means for enabling the application of such simulation signals/functions to the mobile unit (4) to be tested whilst the latter is in situ in its operationally installed condition in such manner as to test the response of the mobile unit to such signals and/or functions. <IMAGE>
Description
ELECTRONIC TEST EQUIPMENT
This invention is concerned with electronic test equipment.
In particular, but not exclusively the present invention is concerned with test equipment for facilitating the diagnostic testing of mobile transmitter/receiver units presently utilised with the so-called cellular mobile communications systems.
In brief, a cellular mobile communication system is a communication network which makes it possible for a transmitter/receiver unit installed in a motor vehicle, to communicate with the conventionally provided telecommunications system by way of a network of transmitter/receiver aerials or beacons each defining the 'focal point' of a so-called cell and each of which are so positioned in predetermined locations relative to each other across the zone or region within which the network is designed to be operative, as effectively to form inter-related groups of cells. In a known system each cell group includes seven individual cells whose arrangement within a group can be likened to a honeycomb.
In this system the groups themselves are mutually arranged within the system so as to expand the extent of the group honeycomb. Each cell beacon is responsive to a predetermined number of channels selected from the total number of channels (amounting to several hundred) involved in the overall system. In addition, each such cell of a group has uniquely ascribed thereto a particular group of the channels whereby no two adjacent cells in the overall system has precisely the same channel grouping.
The underlying concept is that when a mobile transmitter/receiver unit is located within the effective area of any one beacon and the user thereof requires to communicate with a particular telephone number national or otherwise the mobile equipment enables him to dial, in a manner similar to dialling a conventional telephone the required number. The mobile equipment is capable of opening a communication channel to the required telephone subscriber by way of the beacon in the cell within which the vehicle happens to be located at the time of initiating operation of the equipment. The system itself, where necessary, autotatically transfers the communication path from beacon to beacon.As the vehicle with the mobile unit moves further away from any one beacon and moves nearer to any other beacon in the system control arrangements involved within the beacon network of the system and that involved in the mobile equipment ensures that any communication link that has been established is maintained as the vehicle moves from the ambit of one beacon to that of the next beacon along the route of the vehicle. Thus the mobile unit is automatically effectively transferred from one beacon to another without any interferance with (i.e., breaking the ommunication connection established) the communication path between the mobile unit and the called number this being effected without any action by the user.
From the forgoing it will be appreciated that the equipment involved is highly complex, and that having regard to this complexity it has been found that it is essential to be able to provide means for carrying out diagnostic testing of the mobile units both at the time of the initial installation into a vehicle and subsequent thereto.
It is known to provide apparatus for carrying out highly sophisticated tests on the mobile units. However, these known units have been found not to be fully satisfactory in practice, since they are of considerable complexity in use and as their basic purpose does not lend itself to in situ diagnostic testing so that it has been found that it is invariably necessary to remove a mobile unit to be tested from a vehicle in order to perform the requisite diagnostic testing. Since it is possible for a fault condition to be at least in part caused by the actual installation of the mobile unit in the vehicle it is clear that the removal of the unit from the vehicle could prevent the detection of the fault. Furthermore, such removal requirements have been found to be inconvenient to the user who is reluctant to lose the availablilty of the mobile communication system.
It is an object of the present invention to provide apparatus which enables in situ diagnostic testing/checking of mobile transmitter/receiver by non-technical personnel.
Broadly, according to a first aspect of the invention there is provided diagnostic test apparatus for a cellular communications system mobile transmitter/receiver unit, which apparatus is adapted for direct connection to the aerial connection of an mobile unit of the system whilst installed in a vehicle, and which is arranged to simulate a land/base station of the system in such manner that when in operation the diagnostics unit appears to the mobile unit as a land/base station of the system.
Preferably, the apparatus includes means for producing any of a plurality of signals and/or functions for simulating corresponding signals and/or functions involved in the system, and means for enabling the application of such simulation signals/functions to the mobile unit to be tested whilst the latter is in situ in its operationally installed condition in such manner as to test the response of the mobile unit to such signals and/or functions.
Conveniently, the diagnostic test apparatus includes; means for producing signals and/or functions characteristic of the actual operational signals of the cellular communication system; and means for enabling a mobile unit so to intereact with the diagnostic apparatus that the latter appears as a land or base station to the mobile unit, the arrangement being such that the diagnostic apparatus effectively simulates, in relation to a mobile unit under test, a land or base station of the cellular communications system.
For a better understanding of the invention and to show how to carry the same into effect reference will now be made to the accompanying drawings in which :
Figure 1 very schematically represents a group of adjacent cells in a cellular communication system;
Figure 2 is a very schematic block diagram illustrating the major functional sections of the electronic circuitry of a diagnostic test unit incorporating the features of the invention; and
Figure 3 illustrates schematically of the nature of a portion of the display provided by the apparatus of the invention.
Referring now to Figure 1 of the drawings this illustrates in schematic outline the effective area of operation of a group 1 of seven cells 2 of a cellular communication system, each such cell effectively forming a so-called land or base station. Each cell includes a beacon 3 which for convenience the beacons have been identified by the suffix letters A,B,C,D,E,F, and G with the beacon A being located centrally of the other beacons
B through G. Each beacon 3 is capable of operating with a unique plurality of communications channels selected from the total number of channels involved in the cellular system.
As so far described a mobile unit 4 when located, for example, in the operational zone of beacon A is able to communicate with a required telephone number by a communication link involving the beacon A. As the vehicle moves from cell A, for example, to cell B along a route indicated by the line 5 the cellular network is such the the communication path portion formed by the beacon A is transferred to the beacon of cell B. This is effected without the user of the mobile unit being aware of the beacon transfer.
It will be understood that the complex electronic equipment within the mobile unit will be executing channel seeking operations amongst the beacons involved and likely to be involved with a view to ensuring the necessary transfer between adjacent beacons takes place as and when required. In practice, such transfers could well involve a number of interchanges of communication path between beacons whilst maintaining the user's telephone communication path. In practice, to achieve the inherent electronic operations taking place the mobile unit needs to be able to respond to any instantaneous relevant input control and data signals and also to be able effectively to produce the appropriate response signals to maintain and ensure correct operation.
The apparatus of the invention is intended to provide a fully portable diagnostics unit which is capable of creating a plurality of selectable diagnostic functions and/or signals which simulate the signals with which the mobile unit needs to operate and respond when in active use.
Thus the apparatus of the invention incorporates means for producing signals and/or functions characteristic of the actual operational signals of the cellular communication system, and means for enabling a mobile unit so to intereact with the diagnostic apparatus that the latter appears as a land or base station to the mobile unit. In other words the apparatus of the invention can be regarded as simulating in relation to a mobile unit under test, a land or base station of the cellular network.
To achieve this the apparatus of the invention is provided with means for establishing Rx and Tx signals thoughout the Rx and Tx frequency ranges used in the cellular network; means for measuring or otherwise checking channal frequency spacings; means for establishing signals within a predetermined Rx audio bandwidth; means for establishing modulation and demodulation characteristics relevant to the cellular system involved; means for establishing SAT, ST and FSg deviations within the prescribed ranges for the network; and means for providing any test signals or functions thought necessary.
A particular embodiment of the apparatus of the invention incorporates a microprocessor and associated information storage arrangements whereby a series of test signals and functions may be stored in a non-volatile manner so that these stored signals/functions can be withdrawn from the storage arrangement according to a series of predetermined test routines which can be called-up by the user according to a menu of diagnostic routines and which involve the initiation and operation of the various sections of the mobile unit circuitry to produce the requisite response signals at an appropriate point of time during a diagnostic test sequence.
To provide for user flexibility the apparatus provides in menu form a number of test possiblities which can include, a Main Menu which, for example, includes the following possibilities Automatic Test Routine; Automatic
Test Results; Print Test Results, Other Tests; System
Selection; and Battery Level.
If, for example, the Automatic Test Routine is selected the microprocesser cycles the apparatus through a series or sequence of predefined operations and as each one of the operations is performed a display means of the apparatus provides an automatic indication of the ongoing state of the diagnostic test sequence and where necessary provides the operator with the requisite instructions when operator response is required during a diagnostic procedure.
One such display sequence involved in the automatic Test
Routine following selection of the Automatic Test
Routine; Send Control Channel overhead message requesting mobile to register; Page Mobile Unit; Voice channel audit; Perform SAT measurements at 5970Hz, 6000Hz, and 6030Hz; Perform Hand-Offs in Channels 1 to 300 and/or to 600; Alert Mobile (this causes mobile unit telephone to ring) Direct Operator to answer mobile, amd listen for audio test pattern; Flash Test (dial a number); Store Dialled Number; Replace Handset; Manual
Release detected; and present Test Conclusion:- Mobile
Passed/Failed; End of Automatic Test.
It will be understood that the apparatus of the invention will include means for carrying out the relevent tests and the production of the associated signals. The microprocessor is programmed so as to attain the requisite operation and sequencing. The results of the tests carried out are stored in the apparatus for subsequent interrogation by the user and possibly printed using a serial printer port.
It will be appreciated that having caused the apparatus to cycle through the automatic test programme sequence the user can then select from the Main Menu a demand for the test results to be displayed indicating whether or not the mobile unit performance meets with the correct or satisfactory performance.
Referring now to Figure 2 as mentioned this very schematically illustrates in the form of a block diagram major sections of the circuitry of the apparatus involving the features of the invention.
The circuit includes a digital signal section 7 which incorporates a microprocessor which is programmed so as to control the operation of the diagnostics unit.
The section 7 is arranged to produce signals which control amongst other units the operation of a radio frequency signals section 8 and an audio frequency signals section 9,
The radio frequency signals section 8 is a digitally programmable fully synthesized 900 Mhz transmitter receiver unit having a multichannel facility so as to be compatible with radio frequency signal capabilities of a the multichannel facility of a land or base station (not shown in Figure 2) so that it is able to simulate the channel of any mobile unit to be tested.
The audio frequency signals section 9 is effectively interposed between the digital section 7 and the radio frequency section 8 so that it conditions the signals passing therebetween and effectively filters out certain frequency components so that they can be utilised to test the audio frequency aspects of the mobile units.
Arrangements are provided for enabling the operator to control the operation of the diagnostics apparatus as required. In practice, the control is effected by way of a keyboard/keypad 10 connected with the digital section 6.
The keybord, in a particular arrangement includes four keys so that the requirements for user input are reduced as far as possible. In addition, a visual display panel or the like is incorporated so that the diagnostic apparatus can provide the user with visual instructions of user operations required to be effected and also to present to the user a visual indication of the diagnostic menus and results. The keyboard/keypad 10 and the visual display 11 can be conveniently regarded as an operator interface, this being indicated by the reference 12 in the Figure 2.
For example, the operational menus can be displayed and operation prompts given to the user to ensure that adequate indication of a requirement for any user input is given at the appropriate stage during any selected test routine.
The final major section of the apparatus is a power supply 13 which converts input AC to any required voltage level DC supply and which also serves to charge any internal batteries that may be fitted so that the diagnostic unit can be used independently of an AC supply whilst the batteries are adequately charged.
It is convenient to note that the digital section directly controls the operation of all of the units involved in the diagnostic testing routines and sequences. Thus, the section controls the operator interface, the radio frequency section, the audio frequency section, battery condition monitoring, SAT measurements, ST measurements, audio test generation, data encoding and decoding etc.
In practice, amongst the major advantages of the apparatus of the present invention are its ease of use and its extreme portability. For example, the apparatus of the invention can be used to carry out the final testing and checking and the analysis of the performance on equipment whilst the latter is in situ in a vehicle.
Claims (11)
1. Diagnostic test apparatus for a cellular communications system mobile transmitter/receiver unit, which apparatus is adapted for direct connection to the aerial connection of an mobile unit of the system whilst installed in a vehicle, and which is arranged to simulate a land/base station of the system in such manner that when in operation the diagnostics unit appears to the mobile unit as a land/base station of the system.
2. Diagnostic test apparatus as claimed in claim 1, and including means for producing any of a plurality of signals and/or functions for simulating corresponding signals and/or functions involved in the system, and means for enabling the application of such simulation signals/functions to the mobile unit to be tested whilst the latter is in situ in its operationally installed condition in such manner as to test the response of the mobile unit to such signals and/or functions.
3. Diagnostic test apparatus as claimed in claim 1, and in which the apparatus includes; means for producing signals and/or functions characteristic of the actual operational signals of the cellular communication system; and means for enabling a mobile unit so to intereact with the diagnostic apparatus that the latter appears as a land or base station to the mobile unit, the arrangement being such that the diagnostic apparatus effectively simulates, in relation to a mobile unit under test, a land or base station of the cellular communications system.
4. Diagnostic test apparatus as claimed in claim 1,2 or 3, and including means for providing any test signals or functions thought necessary in the testing of the mobile unit, including means for establishing Rx and Tx signals thoughout the Rx and Tx frequency ranges used in the cellular system; means for measuring or otherwise checking channal frequency spacings involved in the system; means for establishing signals within a predetermined Rx audio bandwidth; means for establishing modulation and demodulation characteristics relevant to the cellular communications ' system; and means for establishing SAT, ST and FSK deviations within the prescribed ranges for the system.
5. Diagnostic test apparatus as claimed in claim 4, and wherein the means for providing test signals includes an audio section effectively interposed between a digital section and a radio frequency section in such manner that the audio section serves to condition the signals passing between the digital and radio frequency sections thereby effectively to filter-out predefined audio frequency components so that they can be utilised to test the audio frequency aspects of the mobile unit under test.
6. Diagnostic test apparatus as claimed in claim 1,2,3,4 or 5, and wherein the apparatus incorporates a microprocessor land and associated information storage arrangements whereby a series of test signals and functions may be stored in a non-volatile manner so that these signals/functions can be withdrawn from the storage arrangement according to a series of predetermined test routines which can be called-up by the user according to a menu of diagnostic routines, and which involve the initiation and operation of the various sections of the mobile unit circuitry to produce the requisite response signals at an appropriate point of time during a diagnostic test sequence.
7. Diagnostic test apparatus as claimed in claim 1,2,3,4,5 or 6, and wherein the apparatus includes means for providing in menu form a number of test options whereby a user can readily select any of a range of test options.
8. Diagnostic test apparatus as claimed in claim 7, and wherein said menu includes options such as Automatic
Test Routine; Automatic Test Results; Print Test Results,
System Selection; and Battery Level.
9. Diagnostic test apparatus as claimed in any preceding claim, and wherein the apparatus is arranged to provide a fully portable unit which is capable of creating a plurality of selectable diagnostic functions and/or signals which simulate the signals with which the mobile unit needs to operate and respond when in active use.
10. Diagnostic apparatus as claimed in any preceding claim, and including a keyboard/keypad user input interface.
11. Diagnostic apparatus constructed and arranged to operate substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888823408A GB8823408D0 (en) | 1988-10-05 | 1988-10-05 | Electronic test equipment |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8922207D0 GB8922207D0 (en) | 1989-11-15 |
| GB2232850A true GB2232850A (en) | 1990-12-19 |
| GB2232850B GB2232850B (en) | 1993-06-23 |
Family
ID=10644760
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888823408A Pending GB8823408D0 (en) | 1988-10-05 | 1988-10-05 | Electronic test equipment |
| GB8922207A Expired - Fee Related GB2232850B (en) | 1988-10-05 | 1989-10-03 | Electronic test eqiupment |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888823408A Pending GB8823408D0 (en) | 1988-10-05 | 1988-10-05 | Electronic test equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8823408D0 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2287615A (en) * | 1994-03-16 | 1995-09-20 | Multitone Electronics Plc | Telescopic aerials; testing transmitters |
| EP0691058A1 (en) * | 1993-03-25 | 1996-01-10 | Telular International, Inc. | Self-diagnostic system for cellular-transceiver systems |
| WO1996016523A1 (en) * | 1994-11-18 | 1996-05-30 | Telefonaktiebolaget Lm Ericsson | Method and arrangement in a mobile unit |
| US5613217A (en) * | 1995-05-03 | 1997-03-18 | Telefonaktiebolaget Lm Ericsson | Transceiver site selection a cellular communications system |
| WO1997024009A1 (en) * | 1995-12-22 | 1997-07-03 | Telia Ab | Simulation of distance between base station and mobile terminal |
| WO1997050270A1 (en) * | 1996-06-27 | 1997-12-31 | Cellular Technical Services Company, Inc. | System and method for collection of transmission characteristics of a cellular radio telephone |
| US5706333A (en) * | 1995-02-24 | 1998-01-06 | Teradyne, Inc. | Method and apparatus for analyzing cellular telephone network |
| EP0849966A2 (en) * | 1996-11-25 | 1998-06-24 | Alcatel | Test transmitter, method and computer for testing a cellular mobile radio network |
| US5859894A (en) * | 1994-03-02 | 1999-01-12 | Telular Corporation | Self-diagnostic system for cellular-transceiver systems with remote-reporting capabilities |
| WO1999013669A1 (en) * | 1997-09-08 | 1999-03-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device in telecommunication system |
| EP0993209A2 (en) * | 1998-09-21 | 2000-04-12 | Wavetek Gmbh | Apparatus for testing mobile telephones |
| EP1534033A1 (en) * | 2003-11-24 | 2005-05-25 | Mitsubishi Electric Information Technology Centre Europe B.V. | Method for simulating a mobile telecommunication network and a simulation apparatus for carrying out the method |
| WO2006099524A1 (en) * | 2005-03-14 | 2006-09-21 | Qualcomm Incorporated | Apparatus and methods for product acceptance testing on a wireless device |
| DE102005056779A1 (en) * | 2005-11-28 | 2007-05-31 | Daimlerchrysler Ag | Telematic device functionality diagnosing system for use in vehicle, has main control unit with transmission unit via which radio signal for testing telematic device is emitted, and interface for exchanging data with telematic device |
| DE102006009634A1 (en) * | 2006-03-02 | 2007-09-13 | Daimlerchrysler Ag | Vehicle telematics devices diagnosing method, involves testing receiving and processing functions of telematics devices by measuring devices, and fixing vehicle in defined position to stationary antennas for time of diagnosis |
| EP2063676A1 (en) * | 2007-11-20 | 2009-05-27 | Prisma Engineering S.r.l. | Mobile-terminal simulator for a wireless telecommunications network |
| US9538404B2 (en) | 2000-08-17 | 2017-01-03 | Qualcomm Incorporated | Apparatus and methods for product acceptance testing on a wireless device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554410A (en) * | 1982-11-12 | 1985-11-19 | Hitachi, Ltd. | System for maintenance and diagnosis of mobile telephone equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0278330A (en) * | 1988-09-14 | 1990-03-19 | Marantz Japan Inc | Id-rom emulator for mca radio equipment |
-
1988
- 1988-10-05 GB GB888823408A patent/GB8823408D0/en active Pending
-
1989
- 1989-10-03 GB GB8922207A patent/GB2232850B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554410A (en) * | 1982-11-12 | 1985-11-19 | Hitachi, Ltd. | System for maintenance and diagnosis of mobile telephone equipment |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691058A1 (en) * | 1993-03-25 | 1996-01-10 | Telular International, Inc. | Self-diagnostic system for cellular-transceiver systems |
| EP0691058A4 (en) * | 1993-03-25 | 1996-07-03 | Telular Int Inc | Self-diagnostic system for cellular-transceiver systems |
| TR28486A (en) * | 1993-03-25 | 1996-09-02 | Telular Int Inc | Self-diagnostic system for cellular transceiver systems. |
| US5859894A (en) * | 1994-03-02 | 1999-01-12 | Telular Corporation | Self-diagnostic system for cellular-transceiver systems with remote-reporting capabilities |
| GB2287615A (en) * | 1994-03-16 | 1995-09-20 | Multitone Electronics Plc | Telescopic aerials; testing transmitters |
| GB2287615B (en) * | 1994-03-16 | 1998-02-25 | Multitone Electronics Plc | Telescopic aerials |
| AU695990B2 (en) * | 1994-11-18 | 1998-08-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a mobile unit |
| WO1996016523A1 (en) * | 1994-11-18 | 1996-05-30 | Telefonaktiebolaget Lm Ericsson | Method and arrangement in a mobile unit |
| CN1089537C (en) * | 1994-11-18 | 2002-08-21 | 艾利森电话股份有限公司 | Method and arrangement in mobile unit |
| US6118982A (en) * | 1994-11-18 | 2000-09-12 | Telefonaktiebolaget Lm Ericsson | Method and arrangement in a mobile unit |
| US5706333A (en) * | 1995-02-24 | 1998-01-06 | Teradyne, Inc. | Method and apparatus for analyzing cellular telephone network |
| US5613217A (en) * | 1995-05-03 | 1997-03-18 | Telefonaktiebolaget Lm Ericsson | Transceiver site selection a cellular communications system |
| WO1997024009A1 (en) * | 1995-12-22 | 1997-07-03 | Telia Ab | Simulation of distance between base station and mobile terminal |
| EP0817515A1 (en) * | 1996-06-27 | 1998-01-07 | Cellular Technical Services Company, Inc. | System and method for collection of transmission characteristics for a cellular radio telephone |
| US5893031A (en) * | 1996-06-27 | 1999-04-06 | Cellular Technical Services Company, Inc. | System and method for collection of transmission characteristics |
| WO1997050270A1 (en) * | 1996-06-27 | 1997-12-31 | Cellular Technical Services Company, Inc. | System and method for collection of transmission characteristics of a cellular radio telephone |
| EP0849966A2 (en) * | 1996-11-25 | 1998-06-24 | Alcatel | Test transmitter, method and computer for testing a cellular mobile radio network |
| EP0849966A3 (en) * | 1996-11-25 | 2001-01-31 | Alcatel | Test transmitter, method and computer for testing a cellular mobile radio network |
| WO1999013669A1 (en) * | 1997-09-08 | 1999-03-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device in telecommunication system |
| US6466767B1 (en) | 1997-09-08 | 2002-10-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device in telecommunication system |
| EP0993209A2 (en) * | 1998-09-21 | 2000-04-12 | Wavetek Gmbh | Apparatus for testing mobile telephones |
| EP0993209A3 (en) * | 1998-09-21 | 2000-05-24 | Wavetek Gmbh | Apparatus for testing mobile telephones |
| US9538404B2 (en) | 2000-08-17 | 2017-01-03 | Qualcomm Incorporated | Apparatus and methods for product acceptance testing on a wireless device |
| EP1534033A1 (en) * | 2003-11-24 | 2005-05-25 | Mitsubishi Electric Information Technology Centre Europe B.V. | Method for simulating a mobile telecommunication network and a simulation apparatus for carrying out the method |
| WO2006099524A1 (en) * | 2005-03-14 | 2006-09-21 | Qualcomm Incorporated | Apparatus and methods for product acceptance testing on a wireless device |
| JP2008533921A (en) | 2005-03-14 | 2008-08-21 | クゥアルコム・インコーポレイテッド | Wireless device product acceptance test apparatus, product acceptance test method, wireless communication device, analyzer, and computer program |
| US8019333B2 (en) | 2005-03-14 | 2011-09-13 | Qualcomm Incorporated | Apparatus and methods for product acceptance testing on a wireless device |
| CN101176366B (en) * | 2005-03-14 | 2014-03-26 | 高通股份有限公司 | Apparatus and methods for product acceptance testing on a wireless device |
| DE102005056779A1 (en) * | 2005-11-28 | 2007-05-31 | Daimlerchrysler Ag | Telematic device functionality diagnosing system for use in vehicle, has main control unit with transmission unit via which radio signal for testing telematic device is emitted, and interface for exchanging data with telematic device |
| DE102006009634A1 (en) * | 2006-03-02 | 2007-09-13 | Daimlerchrysler Ag | Vehicle telematics devices diagnosing method, involves testing receiving and processing functions of telematics devices by measuring devices, and fixing vehicle in defined position to stationary antennas for time of diagnosis |
| DE102006009634B4 (en) * | 2006-03-02 | 2009-01-02 | Daimler Ag | High-precision testing of telematics equipment for vehicles |
| EP2063676A1 (en) * | 2007-11-20 | 2009-05-27 | Prisma Engineering S.r.l. | Mobile-terminal simulator for a wireless telecommunications network |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2232850B (en) | 1993-06-23 |
| GB8922207D0 (en) | 1989-11-15 |
| GB8823408D0 (en) | 1988-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941003 |