WO2004028012A1 - Inter-system monitor function - Google Patents
Inter-system monitor function Download PDFInfo
- Publication number
- WO2004028012A1 WO2004028012A1 PCT/EP2003/010319 EP0310319W WO2004028012A1 WO 2004028012 A1 WO2004028012 A1 WO 2004028012A1 EP 0310319 W EP0310319 W EP 0310319W WO 2004028012 A1 WO2004028012 A1 WO 2004028012A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connection
- circuit
- receiver
- wireless device
- air interface
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000001413 cellular effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 9
- 238000013459 approach Methods 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates generally to the field of wireless telecommunications; and, more particularly, to a method and apparatus for monitoring one or more telecommunications systems with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system.
- Wireless devices such as mobile phones, often support multiple telecommunications systems, for example, the system standards GSM (Global System for Mobile
- the device may have a need to monitor the one or more other supported systems with respect to which it is in an idle mode.
- a mobile phone that is in a phone call (connected mode) in one system may have a need to monitor other systems in which it is in an idle mode in order to prepare for a hand-over between the connected system and one of the idle systems.
- the wireless device must be able to access the connected system and the one or more idle systems via an air interface of the wireless device.
- the wireless device transmits and receives user data via the air interface; and, using a receiver associated with the system in the connected mode, also acquires information about the environment of the system in the connected mode.
- the wireless device uses receivers associated with the systems in the idle mode to acquire information about the environment of the systems in the idle mode. In such a situation, a transmitted signal on the air interface from a transmitter associated with the system in the connected mode may block or interfere with receivers of the systems that are in the idle mode unless suitable precautions are taken.
- the system with respect to which the wireless device is in the connected mode may support transmission gaps, e.g., idle frames in GSM or compressed mode in WCDMA.
- the wireless device may use the transmission gaps to monitor the air interface with respect to a system in which the wireless device is in an idle mode without interference.
- Another known approach to overcoming the interference problem is to provide the wireless device with a plurality of antennas, one for each supported system, such that each system can be independently accessed via the air interface.
- the approach that utilizes transmission gaps requires that the one or more idle systems and the connected system be synchronized.
- the time of the WCDMA compressed mode gaps of the WCDMA system This requirement increases the over-all complexity of the wireless device.
- the transmission gaps have an adverse effect on network performance.
- the compressed mode gaps in WCDMA reduces the capacity of the system, while the idle frames in GSM also impact the system, although to a lesser extent.
- An additional disadvantage is that each transmission gap offers only a limited time for monitoring, and the transmission gaps are only available at a limited rate as defined by the system.
- the approach that utilizes a different antenna for each system supported by a wireless device requires isolation between the antennas in order to eliminate interference via the air interface. Isolation requirements between antennas in a wireless device restrict the mechanical design options of the device since the antennas usually need to be separated as much as possible. Also, in some wireless devices, it is desirable to have all the air interface signals for all the supported systems available in one common radio frequency interface. This is desirable, for example, in cars with an external antenna that allow only one radio frequency interface between the wireless device and the external antenna on the car.
- the present invention provides a method and apparatus for monitoring one or more telecommunications systems supported by a wireless device with respect to which the wireless device is in an idle mode while the wireless device is in a connected mode with respect to another supported system.
- an apparatus is provided for monitoring one or more supported systems with respect to which the wireless device is in an idle mode while the wireless device is in a connected mode with respect to another supported system.
- the apparatus according to an exemplary embodiment of the present invention comprises an air interface, at least two access means associated with the at least two supported telecommunications systems for providing the wireless device with access to the at least two systems, and a circuit having a connection to the air interface and a plurality of connections to the at least two access means.
- the circuit provides a low attenuation between the air interface connection and a connection of the plurality of connections to the access means that is associated with a supported system with respect to which the wireless device is in a connected mode, and further includes means for setting the circuit to at least two states, wherein each of the at least two states provides a different attenuation between the air interface connection and one of the plurality of connections to the at least two access means.
- the circuit when one of at least two telecommunications systems supported by a wireless device is in a connected mode, the circuit provides a low attenuation between an air interface connection and a connection to the access means associated with the system that is in a connected mode. At the same time, the circuit controls the attenuation between the air interface and a connection to the access means associated with the at least two systems to permit idle system monitoring.
- the apparatus it is not necessary to synchronize multiple systems in a wireless device when one of the systems is in a connected mode; and, in addition, the apparatus provides a negligible air interface interference between the connected system and any idle system.
- the circuit also attenuates a transmit signal present on the connection to the access means associated with the system in a connected mode and the air interface connection to a receiver of an access means associated with any idle system so that the receiver is not blocked and will operate properly.
- the at least two telecommunications systems comprise a WCDMA system and a GSM system
- the circuit includes a diplexer
- the state setting means comprises a switch controllable between first and second states.
- a method is provided for controlling a WCDMA receiver with Automatic Gain Control (AGC) during a GSM call by changing the response of the WCDMA receiver AGC to make it faster or slower.
- FIGURE 1 is a block diagram that schematically illustrates an apparatus for monitoring a telecommunications system with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system according to an exemplary embodiment of the present invention
- FIGURE 2 is a block diagram that schematically illustrates an implementation of the apparatus of FIGURE 1 according to another exemplary embodiment of the present invention.
- FIGURE 3 is a flow chart that schematically illustrates a method for monitoring a telecommunications system with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system according to another exemplary embodiment of the present invention.
- FIGURE 1 is a block diagram that schematically illustrates an apparatus for monitoring a telecommunications system with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system according to an exemplary embodiment of the present invention.
- the apparatus is generally designated by reference number 10 and is provided in a wireless device 12, such as a mobile phone, that supports both a GSM telecommunications system and a WCDMA telecommunications system.
- apparatus 10 includes an air interface 14 of the wireless device 12, and access means 16 and 18 for providing the wireless device with access to the WCDMA system and the GSM system, respectively.
- Access means 16 comprises a WCDMA receiver/transmitter 20, and access means 18 includes GSM receiver 22 and GSM transmitter 24.
- Apparatus 10 further includes a circuit 26 between the air interface 14 and the access means 16 and 18.
- Circuit 26 includes a connection 30 to the air interface, a connection 32 to the WCDMA receiver/transmitter 20, a connection 34 to the GSM receiver 22 and a connection 36 to the GSM transmitter 24.
- circuit 26 is capable of being set to two different states, designated as State A and State B. The state of the circuit 26 is controlled by the system to which it is connected. For instance, if the wireless device 12 is in a WCDMA call, then the WCDMA system controls the circuit 26.
- circuit 26 of apparatus 10 When circuit 26 of apparatus 10 is in State A, the circuit provides a low attenuation between connection 32 to WCDMA RX/TX 20 and air interface connection 30 for WCDMA receive/transmit signals. In addition, the circuit provides a low attenuation between connection 34 to GSM receiver 22 and air interface connection 30 for GSM receive signals. Furthermore, in State A, circuit 26 attenuates the WCDMA transmit signal, present on the WCDMA RX/TX connection 32 and the air interface connection 30, going to the GSM RX connection 34. Attenuation of the WCDMA transmit signal is needed so as not to block the GSM receiver so that the GSM receiver will operate properly.
- FIGURE 2 is a block diagram that schematically illustrates an implementation of apparatus 10 of FIGURE 1 according to other exemplary embodiments of the present invention.
- the circuit includes a combination of a switch and a diplexer.
- apparatus 10a is provided in a wireless device 12a having a circuit 26a that includes a diplexer 42a and a switch 44a.
- Diplexer 42a is connected to air interface 14 via air interface connection 30 and to WCDMA receiver/transmitter 20 via connection 32.
- Diplexer 42a is also connected to switch 44a by connection 48, and switch 44a is connected to GSM receiver 22 via connection 34 and to GSM transmitter 24 via connection 36.
- Switch 44a is operable between two states (positions). In State A, diplexer 42a is connected to GSM receiver 22 via connection 34, and in State B, the diplexer is connected to
- the GSM system controls the switch 44a so that when the wireless device 12a is not transmitting a GSM signal, the switch 44a is in State A.
- circuit 26a thereof when the wireless device 12a is in a WCDMA call (i.e., the wireless device is in a connected state with respect to the WCDMA system), circuit 26a thereof is set to State A.
- State A WCDMA receiver/transmitter 20 is allowed access to air interface 14 with low attenuation to transmit and receive signals.
- GSM receiver 22 has access to air interface 14 with low attenuation, so that the air interface can be monitored.
- the WCDMA transmit signal is attenuated on the GSM receiver connection; and, as a result, the GSM receiver will not be blocked and can do the monitoring without any blocking air interference from the WCDMA transmitter.
- circuit 26a With the wireless device 12a in a GSM call (i.e., the wireless device is in a connected state with respect to the GSM system), circuit 26a will switch back and forth between State A and State B.
- the circuits will be in State B only during transmission of GSM up-link bursts, so that the GSM up-link bursts reach the air interface with low attenuation.
- the circuits will be in State A the remainder of the time so that GSM down-link bursts can be received with low attenuation. This is possible since GSM is a TDMA (Time Division Multiple Access) system with reception and transmission at different times.
- TDMA Time Division Multiple Access
- the WCDMA receiver With the wireless device 12a in a GSM call (i.e., the wireless device is in a connected state with respect to the GSM system), and with the circuit 26a in State A, the WCDMA receiver also has access to the air interface 14 with low attenuation so that the air interface can be monitored. There will be no GSM transmit signal with the circuits in State A.
- the WCDMA receiver may or may not have access to the air interface with low attenuation depending on the design of the circuit.
- circuit 26a of FIGURE 2 provides access with low attenuation for the WCDMA receiver.
- the WCDMA receiver will not be blocked by the GSM transmitter. If State B provides access to the air interface with low attenuation for the WCDMA receiver (if circuit 26a of FIGURE 2 is used), then the WCDMA receiver is able to monitor the air interface just as in State A.
- State B does not provide low attenuation access to the air interface for the WCDMA receiver, the monitored signal will appear more attenuated to the WCDMA receiver in State B.
- the signal monitored by the WCDMA receiver when in a GSM call, will have a changing power level depending on whether the GSM system is receiving or transmitting. Accordingly, for some realizations of the circuit of the apparatus of FIGURE 1, and during GSM calls with the WCDMA receiver monitoring the air interface, the received signal power to the WCDMA receiver will intermittently be significantly attenuated.
- a signal with this property may, if fed to a receiver with AGC (Automatic Gain Control), disrupt the function of the receiver AGC so that improper gain, or constantly changing gain, prevents or degrades monitoring. Monitoring may be prevented and/or degraded of over-flow and/or of under-flow and/or of improper averaging in detector filters.
- AGC Automatic Gain Control
- a WCDMA receiver with AGC can be controlled during a GSM call by changing the response of the WCDMA receiver AGC by, for example, by making it faster or slower.
- FIGURE 3 is a flow chart that schematically illustrates a method for monitoring a telecommunications system with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system according to another exemplary embodiment of the present invention.
- the method is generally designated by reference number 100 and comprises providing a wireless device with a circuit having an air interface connection and a plurality of connections to at least two access means associated with at least two telecommunications systems supported by the wireless device (step 110).
- the method further comprises setting the circuit to one of at least two states wherein each state provides a different attenuation between the air interface connection and one of the plurality of connections (step 120). In this way, a low attenuation can be provided between the air interface and a connection to an access means associated with one of the at least two systems with respect to which the wireless device is in a connected mode.
- the circuit controls the attenuation between the air interface connection and a connection to an access means associated with a system of the at least two systems with respect to which the wireless device is in an idle mode to permit idle system monitoring.
- the circuit can be a circuit that has a common radio frequency interface (for connecting to the air interface) and that has radio frequency interfaces for two or more wireless systems, that provides a low attenuation between the air interface connection and the connection to the access means that is associated with the connected system, and that attenuates the transmit signal from the access means associated with the connected system to the access means associated with a receiver of a system in an idle mode, and that may be set to two or more modes, where the difference between the modes is a change in attenuation between the air interface connection and another connection.
- the apparatus according to the present invention can be used with all wireless devices that support multiple systems.
- the general method for using the circuit is to set it into a mode with low attenuation between the air interface connection and the connection to the access means associated with the system in the connected mode, which, for a TDMA system may lead to a continuously changing circuit mode.
- the general method also includes changing a receiver AGC response in any idle mode monitoring system due to continuously changing attenuation in the circuit.
- an apparatus for monitoring one or more systems with respect to which a wireless device is in an idle mode while the wireless device is in a connected mode with respect to another system there is no need to synchronize the multiple systems supporting multiple standards. For example, there is no need to synchronize a GSM access means and a WCDMA access means of a GSMAVCDMA dual mode wireless device, and there is no need to implement compressed mode in WCDMA, thus avoiding degraded WCDMA system capacity and simplifying the wireless device design. With embodiments of the present invention there is also negligible air interface interference between a system with respect to which the wireless device is in a connected mode and any system with respect to which the wireless device is in an idle mode.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Transceivers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003271612A AU2003271612A1 (en) | 2002-09-23 | 2003-09-17 | Inter-system monitor function |
JP2004568887A JP2006500881A (en) | 2002-09-23 | 2003-09-17 | Inter-system monitoring function |
EP03753419A EP1543630A1 (en) | 2002-09-23 | 2003-09-17 | Front-end circuit for monitoring different mobile communication systems |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41283102P | 2002-09-23 | 2002-09-23 | |
US60/412,831 | 2002-09-23 | ||
US10/654,162 US7050828B2 (en) | 2002-09-23 | 2003-09-03 | Inter-system monitor function |
US10/654,162 | 2003-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004028012A1 true WO2004028012A1 (en) | 2004-04-01 |
Family
ID=32033625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/010319 WO2004028012A1 (en) | 2002-09-23 | 2003-09-17 | Inter-system monitor function |
Country Status (6)
Country | Link |
---|---|
US (1) | US7050828B2 (en) |
EP (1) | EP1543630A1 (en) |
JP (1) | JP2006500881A (en) |
KR (1) | KR20050051667A (en) |
AU (1) | AU2003271612A1 (en) |
WO (1) | WO2004028012A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2352356A1 (en) * | 2008-10-22 | 2011-08-03 | ZTE Corporation | Dual-mode mobile phone and method for inhibiting interference of gsm/cdma |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1574095B1 (en) * | 2002-12-19 | 2006-10-11 | Telefonaktiebolaget LM Ericsson (publ) | Assigning time slots during transmission gaps of a first protocol communication to a second protocol communication |
US7340266B2 (en) * | 2002-12-20 | 2008-03-04 | Motorola, Inc. | Method and apparatus for communicating with multimode receiving device in non-synchronized wireless systems |
US6990362B2 (en) * | 2003-12-16 | 2006-01-24 | Motorola, Inc. | Communication unit energy conservation apparatus and method |
JP5150601B2 (en) * | 2009-10-20 | 2013-02-20 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication terminal, mobile communication control apparatus, mobile communication system, and mobile communication method |
DE102012014548B3 (en) * | 2012-07-21 | 2014-05-15 | Audi Ag | Mobile device for a motor vehicle, and method for operating the mobile device |
DE102012014547B4 (en) | 2012-07-21 | 2015-06-25 | Audi Ag | Circuit arrangement for a mobile radio unit of a motor vehicle, motor vehicle and method for operating the circuit arrangement |
US9888421B2 (en) | 2014-09-16 | 2018-02-06 | Mediatek Inc. | Method of enhanced bearer continuity for 3GPP system change |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002027953A1 (en) * | 2000-09-29 | 2002-04-04 | Spirea Ab | Baseband front-end for multi standard receiver |
US20020090974A1 (en) * | 2000-10-26 | 2002-07-11 | Peter Hagn | Combined front-end circuit for wireless transmission systems |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2323881A1 (en) * | 2000-10-18 | 2002-04-18 | Dps Wireless Inc. | Adaptive personal repeater |
GB2374219B (en) * | 2001-04-06 | 2004-10-13 | Nokia Corp | A receiver |
US6774857B2 (en) * | 2002-09-12 | 2004-08-10 | Agilent Technologies, Inc. | Method facilitating inter-mode handoff |
-
2003
- 2003-09-03 US US10/654,162 patent/US7050828B2/en not_active Expired - Fee Related
- 2003-09-17 JP JP2004568887A patent/JP2006500881A/en active Pending
- 2003-09-17 KR KR1020057004997A patent/KR20050051667A/en not_active Application Discontinuation
- 2003-09-17 EP EP03753419A patent/EP1543630A1/en not_active Withdrawn
- 2003-09-17 AU AU2003271612A patent/AU2003271612A1/en not_active Abandoned
- 2003-09-17 WO PCT/EP2003/010319 patent/WO2004028012A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002027953A1 (en) * | 2000-09-29 | 2002-04-04 | Spirea Ab | Baseband front-end for multi standard receiver |
US20020090974A1 (en) * | 2000-10-26 | 2002-07-11 | Peter Hagn | Combined front-end circuit for wireless transmission systems |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2352356A1 (en) * | 2008-10-22 | 2011-08-03 | ZTE Corporation | Dual-mode mobile phone and method for inhibiting interference of gsm/cdma |
EP2352356A4 (en) * | 2008-10-22 | 2013-01-23 | Zte Corp | Dual-mode mobile phone and method for inhibiting interference of gsm/cdma |
Also Published As
Publication number | Publication date |
---|---|
US7050828B2 (en) | 2006-05-23 |
KR20050051667A (en) | 2005-06-01 |
EP1543630A1 (en) | 2005-06-22 |
US20040092286A1 (en) | 2004-05-13 |
AU2003271612A1 (en) | 2004-04-08 |
JP2006500881A (en) | 2006-01-05 |
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