KR20080019029A - A method for reducing interference - Google Patents

Abstract

This invention relates to wireless communication systems, specifically to methods for reducing interference. The invention allows a mobile station to determine if certain transmissions of the mobile station cause interference to reception by a second receiver in the mobile station, and indicate to the network that a change in a transmission parameter of the mobile station is desired. The network can then change a transmission parameter to reduce interference observed by the second receiver.

Description

Interference Reduction Methods, Mobile Stations, Network Elements, Systems, Software Program Products and Integrated Circuits {A METHOD FOR REDUCING INTERFERENCE}

The present invention relates to a wireless communication system, and more particularly, to a method for reducing interference.

A communication system is a facility that enables communication between two or more entities, such as user terminal equipment and / or network entities, and other nodes connected to the communications system. The communication may include, for example, communication such as voice, email, text message, data, multimedia, and the like.

Communication may be provided by a wired and / or wireless communication interface. A feature of wireless communication systems is that they provide mobility to their users. An example of a communication system that provides wireless communication is a public land mobile network (PLMN). An example of a wired system is a public switched telephone network (PSTN).

Cellular telecommunication systems are communication systems based on the use of radio access entities and / or wireless service areas. An access entity is typically referred to as a cell. Examples of cellular telecommunication standards include Global System for Mobile communications (GSM), General Packet Radio Servers (GPRS), Enhanced Data Rates for GSM Evolution (EDGE), American Mobile Phone System (AMPS), Digital AMPS (DAMPS), and WCDMA (WCDMA). Wideband Code Division Multiple Access (UMTS), Universal Mobile Telecommunication System (UMTS), and Code Division Multiple Access 2000 (CDMA 2000). Other types of wireless communication systems other than cellular telecommunication systems are also known. For example, wireless local area networks (WLAN) are well known. There are several WLAN standards in use. For example, there is a standard (802.11b) for the 2.4 GHz frequency and a standard (802.11a) for the 5 GHz frequency domain. There is also a technology called WiMax, which is typically classified as an instance of wireless LAN technology. Currently, wireless communication technology using ultra wide band (UWB) is being developed.

Combining different radio technologies in mobile devices, such as mobile phones or, more generally, mobile stations, presents a number of problems. One difficult problem is the interference of different wireless systems combined in the same device. For example, in some cases some GSM transmission harmonics are included in the WLAN frequency band and thus GSM transmissions may disrupt the WLAN connection. For example, the third harmonic of transmission using GSM1800 technology will be at least partially in or near the 5 GHz WLAN frequency band. This is a significant problem when the WLAN receiver and the GSM transmitter are in close proximity to one another, for example when integrated within the same device, such as a mobile phone.

Harmonics, for example, transmit in a frequency band near 850 MHz but are a problem in devices with Bluetooth receivers. Certain cellular technologies, such as GSM850, CDMA850, and WCDMA850, use frequency bands around about 850 MHz. The third harmonic frequency of the transmission of such a cellular transmitter is at least partly contained in or near the Bluetooth reception frequency band.

Filtering can help to remove unwanted harmonics, but the filtering scheme can be complex and expensive. In addition, filtering at high frequencies, such as in the 5 GHz WLAN frequency band, is technically difficult to build high quality filters. This is due to, for example, self-resonance effects resulting from the parasitic capacitance of the inductor. The inductor can also be implemented on the substrate using either an RF line or a micro line. However, the substrate material also causes loss of the RF signal. The 5 GHz WLAN band is difficult to filter because of the wide bandwidth of 675 MHz, which complicates the filter design.

In some types of mobile terminals, the transmitted and received signals are separated by filtering in so-called duplexers. Such a duplexer can reduce interference between a transmitter in one wireless system and a receiver in another wireless system. However, some systems, such as typical GSM / EDGE mobile stations, use switches that connect the transmitter and receiver to the antenna. In this case, adding a filter to the second service that reduces the interference of the transmitter will increase the complexity and cost of the receiver. In addition, additional filtering will increase the insertion lesses of the receiver and transmitter. This increases the current consumption in the transmitter and decreases the sensitivity of the receiver.

In addition, it is very difficult to filter when the frequency band of the cellular communication network is very close to the frequency band of the second service. The bands may be so close that a sufficiently good filter cannot be reliably or economically produced.

In addition to harmonics, another source of disturbance is the wideband noise of the transmission, which can result in a significant noise level increase in the receiver in the same device as the transmitter. For example, wideband noise of GSM1800 transmissions outside of the transmission band may disturb GPS reception in the GPS L1 band (1575.42 MHz) during the transmission slot. In addition, the broadband noise of the GSM900 transmitter can interfere with reception in the GPS L5 band (1176.25 MHz).

The mobile terminal can know its location geographically using a number of methods on its own. In a cellular network, a direct way to locate a terminal is to use cell identification information indicating the identity of the current base station. The network may also know the location of the terminal by observing transmission arrival times from multiple base stations. Currently, there is a trend to integrate a satellite based locator device, such as a GPS or Galileo reciever, within a mobile station to generate location information. However, the transmission from the mobile station to the wireless network may appear as interference to the GPS receiver in the mobile station.

There may also be devices in which different physical units have a shared function. Such devices are often referred to as the multipart product. The first unit of the multipart product may comprise earphones and a microphone, and the second unit of the multipart product is in communication with the cellular network. Units of a multipart product can communicate with each other via, for example, a Bluetooth air-interface.

Some wireless communications that may be received due to transmission of the cellular portion within the mobile station within the mobile station are, for example, digital video broadcasts (DVB), WLAN transmissions, UWB transmissions and Bluetooth transmissions. Of course, the degree to which different services are interfered by cellular transmission depends on the location of the frequency bands of those services that vary from region to region and even between operators in certain regions. For example, in the United States, one cellular band can be shared between two operators.

Terrestrial digital video broadcasting (DVB-T) was first adopted as a standard in 1997 and has been deployed in many parts of the world. DVB-T provides a fixed receiver with a data transmission capacity of about 24 megabits per second and a receiver in a mobile station with a data transmission capacity of about 12 Mb / s. Mobile stations that include such mobile receivers are already being produced and can receive DVB-T signals.

Although DVB-T delivers high quality video broadcast to a variety of devices, the DVB-T standard has some problems with mobile stations. One such problem is power usage due to the tendency of mobile stations implementing DVB-T to consume too much power. If the mobile station is not plugged into an auxiliary power source, the mobile station is supplied with battery power, so power usage is an important design element. In response to this power usage and other impacts of DVB-T, the DVB-H (portable device version of DVB) standard was created. DVB-H offers reduced power usage, in particular compared to DVB-T.

Because of the advantages of DVB-H over DVB-T, DVB-H is beginning to enter the mobile station market. At the time of writing of this patent specification, a pilot project has begun to bring services such as television to mobile devices using DVB-H technology. Although DVB-H is an improvement over DVB-T, DVB-H also causes some problems. For example, a mobile station will typically include at least one transmitter that transmits using one or more frequency bands. DVB-H receivers typically receive in a different frequency band than one or more frequency bands used by any transmitter in the mobile station. For example, some mobile stations may support the Global System for Mobile communications (GSM) standard, and the frequency band used by the GSM transmitter is different from the frequency band used by the DVB_H receiver. However, transmission using one frequency band can still cause interference within the frequency band used by the DVB-H receiver in the same device.

In the European Union DVB-H version, the reception band is on the lower side of the GSM frequency band (GSM900 with a transmission frequency band of 880-915 MHz), and the reception frequency band is for transmission in the 900 MHz frequency band. It is far enough to not band-block the DVB-H receiver. However, wideband noise can also be a problem for European DVB-H reception.

In the context of the US standard, transmission in the 850 MHz frequency band may produce secondary harmonics that will be at least partially at the top of the US DVB-H receiving frequency band of 1670-1675 MHz. In addition, the 850 MHz frequency band transmission will generate wideband noise in the US DVB-H frequency band. The most difficult frequency is 835.0-837.5 MHz at the time of transmission, because such frequencies produce harmonics directly on top of the US DVB-H frequency band.

In addition, there will soon be more than DVB-H based digital TV services available in the United States. One known system under development is MediaFlo, a digital television service implemented by Qualcomm. In the MediaFlo system, the center transmission frequency is 719 MHz. This digital TV system will use an OFDM based modulation method similar to that used in DBV-H systems. Therefore, similar interoperatability problems as the MediaFlo system rather than the DVB-H system can be estimated. Broadband noise from the 850 MHz band cellular system can create interfering noise in the MediaFlo receive channel.

Embodiments of the present invention aim to overcome one or more of the above-mentioned problems.

According to one aspect of the present invention, a method is provided for a mobile station in a wireless communication network. The method can be used in a mobile station having a first receiver and a first transmitter in communication with a wireless communication network in at least a first frequency band and a second receiver in the transmission in at least a second frequency band.

The method includes determining whether a change in the transmission parameter of the mobile station causes less interference to reception by the second receiver by transmission of the mobile station, and if so, sending a message indicating the communication parameter to the wireless communication network. It includes a step.

The message may indicate a channel, a frequency band, a second wireless communication network, a modulation method, timing information, or a type of service received by the second receiver or location information of the mobile terminal, for example. The message may also indicate timing information of the second wireless communication network, or timing information of, for example, signal interference reception by the second receiver. The message may also indicate the power level of the interfering signal, the transmit power level of the second wireless communication network, the received power level of the signal received from the second wireless communication network, or the frequency of the interfering signal, for example.

The message may be a handover request message.

The method may further comprise transmitting an indication of one or more transport channels, frequency bands or wireless communication networks and an indication of one or more transport channels, frequency bands or wireless communication networks.

The method may further comprise transmitting to the wireless communication network an indication that the reception by the second receiver has ended.

In an embodiment, the message may indicate a transmission parameter to be used in transmission from the mobile station to the wireless communication network.

In another embodiment, the message may indicate a transmission parameter to be avoided in transmission from the mobile station to the wireless communication network.

According to a second aspect of the present invention, a method in a wireless communication system is provided.

The method includes receiving a message from a mobile station, extracting an indication of a communication parameter from the received message, and changing a communication parameter of a wireless link between the wireless communication system and the mobile station upon receipt of the message.

The method may include receiving an indication from the mobile station that the reception by the second receiver in the mobile station has been completed and initiating a handover upon receiving the indication.

The method may include receiving information from a mobile station about reception timing by a second receiver in the mobile station and adjusting a communication parameter based on the received timing information.

The present invention comprises the steps of receiving information from a mobile station about a frequency band received by a second receiver in the mobile station, selecting a handover target based at least in part on received information about the frequency band, and selecting the selected handover target. Initiating a handover to the network.

The method includes receiving information from a mobile station about a type of service received by a second receiver in the mobile station, selecting a handover target based at least in part on received information about the type of service, and selecting the selected handover target. Initiating a handover to the network.

The handover target is a channel, frequency band, or for example a wireless communication network.

According to a third aspect of the invention, there is provided a mobile station having a first transmitter and a second receiver in communication with a wireless communication network in at least a first frequency band and a second receiver in receiving transmission in at least a second frequency band.

The mobile station is configured to wirelessly communicate a message indicating a communication parameter with a controller that determines whether a change in the transmission parameter of the mobile station will cause less interference to reception by the second receiver by transmission of the mobile station. It includes a transmitter for transmitting to the network.

The mobile station may comprise a controller for transmitting information regarding the timing of reception by the second receiver to the wireless communication network.

The mobile station may comprise a controller for transmitting information regarding the second frequency band to the wireless communication network.

The mobile station may comprise a controller for transmitting information regarding the type of service received by the second receiver to the wireless communication network.

The mobile station may comprise a controller for transmitting an indication of one or more transmission channels, frequency bands or wireless communication networks and an indication of one or more transmission channels, frequency bands or wireless communication networks.

The mobile station may include a controller that, when the reception by the second receiver ends, sends an indication to the wireless communication network that the reception by the second receiver has ended.

According to a fourth aspect of the present invention, a network element for a wireless communication system is provided.

The network element includes a controller for extracting an indication of communication parameters from a message received from a mobile station and a controller for changing transmission parameters of a radio link between the wireless communication system and the mobile station when extracting the communication parameters from a message received from the mobile station.

According to a fifth aspect of the invention, a system in a wireless communication network is provided.

The system includes a controller for extracting an indication of a communication parameter from a message received from a mobile station, and a controller for changing a transmission parameter of a radio link between the wireless communication system and the mobile station when extracting the communication parameter from a message received from the mobile station. .

According to a sixth aspect of the invention, there is provided a software program product for performing the steps of a method for a mobile station. The software program product may be executed in a processing unit of a mobile station that executes specified method steps. The software program product may be provided in various types of media such as memory means such as random access memory, recordable memory such as FLASH memory, or read only memory. The software program product may also be provided on an optical carrier such as magnetic, magneto-optical, or CD-ROM.

According to a seventh aspect of the invention, there is provided a software program product for performing the steps of a method in a wireless communication system. The software program product may be executed in a processing unit of a network element of a wireless communication system for performing specified method steps. The software program product may be provided in various types of media such as memory means such as random access memory, recordable memory such as FLASH memory, or read only memory. The software program product may also be provided on an optical carrier such as magnetic, magneto-optical, or CD-ROM.

The invention may also be provided as an integrated circuit, for example a circuit with a processor unit and memory means, or as a dedicated ASIC circuit for example. According to an eighth aspect of the present invention, there is provided an integrated circuit for a mobile station of a wireless communication network, the mobile station having a first transmitter, a first receiver and at least a second receiver. The integrated circuit includes a controller for determining whether a change in a transmission parameter of a mobile station causes less interference to reception by a second receiver by transmission of the mobile station, and wireless communication of a message indicating a communication parameter if the determination by the controller is positive. A message transmitter for initiating transmission to the network.

The integrated circuit may further include an information structure containing information regarding at least one transmission parameter for the first transmitter that causes interference in reception in a channel or frequency band by the second receiver.

The integrated circuit may further include a calculator for calculating the harmonic frequency of the transmission of the first transmitter, and a controller for determining if the harmonic frequency of the transmission by the first transmitter is within the receiving channel or frequency band of the second receiver.

Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings.

1 illustrates a mobile station having a first radio, a second radio and a network element;

2 illustrates a method in a mobile station;

3 is a diagram illustrating a method in a network element of a wireless communication system.

1 shows a mobile station comprising a first radio part 50 with a first transmitter 52 and a first receiver 54 and a second radio part 60 with at least a second receiver 64. 10) is illustrated. The mobile station also has a user interface 12 that includes, for example, a display and a keyboard. The mobile station also includes at least one processor 30 that controls the operation of the mobile station and performs most of the mobile station's functions. The mobile station may typically include many other elements as well, but for the sake of clarity other elements are not illustrated in FIG.

1 also illustrates a wireless communication network 70 with a base station 72 in communication with a mobile station 10. The wireless communication network can be, for example, a cellular communication network such as a GSM, UMTS or CDMA network, or a WLAN network.

1 also illustrates various other types of wireless services that may be used by the second wireless unit 60 of the mobile station. For example, the second radio may be a satellite positioning receiver, such as a GPS receiver that receives a location signal from satellite 82. The second radio 60 may also be a television receiver, for example a DVB-H receiver, that receives a transmission from the television broadcast transmitter 80. The second radio may also include a receiver 64 and a transmitter for the second radio communication system in a different frequency band or bands than the first radio 50. For example, the second radio may be a WLAN transceiver in a mobile station having a GSM transceiver as the first radio, and the second radio communicates with the base station 85 of the WLAN network 84.

1 also illustrates a network element 74 of a wireless communication network. The network element 74 changes the transmission parameters of the radio link between the wireless communication system and the mobile station by means of means 75 for extracting indicators of communication parameters from messages received from the mobile station, and extracting communication parameters from messages received from the mobile station. Means 76. These means may be embodied in the form of a controller or as software code, for example, running on a processor of a network element.

In an embodiment of the present invention, the method of the present invention is implemented in integrated circuit 32. In the example of FIG. 1, the integrated circuit includes a controller 33. The controller can determine whether a change in the transmission parameter of the mobile station will cause less interference to reception by the second receiver by transmission of the mobile station. The integrated circuit also includes a message transmitter 34 for initiating message transmission to the wireless communication network indicative of communication parameters.

In the example of FIG. 1, the integrated circuit also includes an information structure 35 that includes information about at least one transmission parameter for the first transmitter that causes interference to reception on a channel or frequency band by the second receiver. do. For example, the information structure may indicate that GSM transmissions on a given channel cause interference to reception within a given WLAN channel. In the example of FIG. 1, the integrated circuit also includes a calculator 36 for calculating the harmonic frequency of the transmission of the first transmitter and whether the harmonic frequency of the transmission by the first transmitter is included in the receiving channel or frequency band of the second receiver. And a controller 33 for discriminating.

The present invention is directed to the aspect that a mobile station having a first transmitter and a first receiver communicating with a wireless network and a second receiver receiving a transmission from another service has information about a frequency band (or bands) of a second receiver. Is based. If the mobile station observes that the channel the mobile station is trying to transmit or attempts to transmit causes interference to the service reception by the second receiver, the mobile station may transmit an indication about it to the wireless communication network. This indication may, for example, be in the form of a message indicating a channel causing less interference. Upon receiving such an indication, the network can change the transport channel used for communication between the mobile station and the network, for example, by initiating handover to different channels, different cells or for example different frequency bands. The network may also initiate handover to a different wireless communication network if the mobile station can communicate in two different networks, such as in GSM and CDMA networks.

Communication between the mobile station and the network can also change the modulation method to reduce interference. For example, in a GPRS / EDGE system, communication may exchange EDGE modulation used for higher bitrate communication and GMSK modulation used for lower bit rate communication.

The method may further comprise changing a method of operation of the transmission. This may be implemented, for example, in a WCDMA / GSM network where WCDMA operation is used for higher bit rate communication and GSM operation is used for lower bit rate communication.

The mobile station can also advantageously represent one or more channels, frequency bands or wireless communication networks. The mobile station may also specify an order of preference that the wireless communication network may consider in making a decision about initiating handover.

The mobile station can advantageously send a message indicating a more suitable transport channel in various situations. For example, the mobile station may send such a message as soon as the second receiver observes that the second receiver is active during transmission by the first transmitter of the mobile station. As another example, the mobile station may send such a message as soon as it receives a command from the user of the station and starts receiving using the second receiver.

In an embodiment, the system sends a message to the mobile station indicating a candidate handover target prior to the handover procedure. In this embodiment, the mobile station can determine whether the transmission after the handover will cause more interference than the transmission before the handover. If the handover causes an increase in interference, the mobile station may send a message to the network indicating the same transmission parameters as other handover targets.

The mobile station can determine the channel or frequency band that is likely to cause interference in reception by the second receiver in various ways. For example, the mobile station may include a table or other information structure that includes information about collisions between different transmission channels and / or transmission frequency bands and different reception channels and / or frequency bands. For example, the table may indicate that GSM transmissions on a given channel cause interference to reception on a given WLAN channel.

In an embodiment, the mobile station can internally calculate interfering mixing products and / or harmonics if it knows the operating frequencies of the air interfaces of the first and second radios. Based on such calculations and knowledge of the operating frequency, the terminal can find a suitable radio frequency to propose to the network in communication with the first radio.

In an embodiment, the mobile station can directly measure interference situations. For example, interferometry may be performed in a GSM / WLAN / Bluetooth system between a transmission slot and a reception slot while the terminal is in idle mode. Interference measurement results can be reported to different wireless networks.

The mobile station may also indicate to the wireless network timing information in a message regarding the received signal by the second receiver. The wireless network may use the information to adjust one or more communication parameters, such as the timing of communication between the mobile station and the network, to reduce the simultaneous occurrence of transmission by the first transmitter and reception by the second receiver in the mobile station.

The mobile station may also indicate other kinds of information about reception by the second receiver. Such information may be, for example, information about the frequency band or bands on which the receiver will operate, or information about the type of service to be received by the receiver, for example. The wireless network may use this information when determining whether to perform a handover and the channel or frequency band on which to perform the handover.

Such other kind of information that the mobile station may present to the network is, for example, timing information of the transmission and reception periods, which may help to avoid interference if the transmission and reception periods can be configured to at least reduce interference. have.

In an embodiment, the mobile station can represent timing information in the form of the channel and timing tables of the radios within the mobile station. The mobile station may, for example, send the channel assignment table of the Bluetooth device in the mobile station to the network.

The mobile station may also represent a network in which other modulation methods may be used. This is advantageous if the interference can be reduced by changing the modulation method.

The mobile station may also indicate the location of the mobile terminal to the network. The location information may help to determine a more advantageous radio link to a closer base station, for example, reducing the transmit power of the first radio and consequently reducing the interference observed by the second radio. The mobile station may obtain location information from the second radio, for example if the second radio is a location survey system receiver such as a GPS receiver.

Another way to reduce interference using location information is that the network continues to update the information about the interference situation as a result of reporting by the mobile station. This information can be used for optimizing spectrum usage and data throughput optimization by avoiding the use of interfering radio channels for data transmission and thus reducing the need for retransmission of data. This allows the end user to deliver a better user experience and to deliver more data bits that may charge the user for the operator.

The mobile station may also include a second transmitter in communication with the network providing the transmission received by the second receiver. For example, a mobile station may include a transmitter and receiver in communication with a GSM network and a transmitter and receiver in communication with a WLAN network. In this example, the mobile station observes whether simultaneous use of both GSM and WLAN networks occurs, and whether transmissions to one of the networks disturb reception from other networks, and sends messages to one of the networks to You can request a change.

In an embodiment, the mobile station can send an indication to the network indicating that the original transport channel can be used again when the second transmitter is no longer used.

2 illustrates a method in a mobile station of a wireless communication system. The method includes determining 210 if a change in the transmission parameter of the mobile station causes less interference to reception by the second receiver by transmission of the mobile station. If the verdict is affirmative, a message indicative of the communication parameters is sent to the wireless communication network at 220.

3 illustrates a method in a network element of a wireless communication system. The method includes receiving 310 a message from a mobile station, extracting 320 communication parameters from the received message, selecting 330 communication parameters for the wireless link between the mobile station and the wireless communication system; Changing the communication parameters of the wireless link between the wireless communication system and the mobile station upon receiving the message (340).

The selecting step may include, for example, the selection of a handover target, and the changing the communication parameter may include a handover to the selected handover target.

The indication of the communication parameters that will reduce the interference of the second radio can be performed in many different ways. The mobile station may indicate to the network a parameter or multiple parameters that are a better selection or choices than the currently used parameter. For example, a mobile station may represent multiple transport channels that, in use, cause less interference than when using the current transport channel.

In another embodiment, the mobile station may indicate to the network which parameter or multiple parameters to be avoided. For example, if transmission on the current transmission channel interferes with reception by a second radio in the mobile station, the mobile station may indicate the current transmission channel to the network, which in this embodiment prevents the network from transmitting to another channel. This will be a factor to consider when making changes.

In another embodiment, the mobile station may indicate to the network a communication parameter or multiple parameters relating to reception by the second radio. The network may then use the received parameters to determine appropriate transmission parameters for the first radio portion of the mobile station. For example, the mobile station may indicate to the network the reception frequency of the second receiver, and the network may then use that information to determine the transmission parameters that would be suitable for the first radio, possibly as observed by the second radio. The interference can be reduced.

While the foregoing description illustrates various embodiments of the invention in 3G cellular telecommunications systems, it should be noted that the present invention is not limited to so-called 3G cellular systems, but may be implemented in other types of cellular telecommunications systems.

In addition, although the foregoing description illustrates exemplary embodiments of the invention, various modifications and variations of the disclosed solutions without departing from the scope of the invention as defined in the appended claims. Note that there is.

Claims (40)

Mobile station of a wireless communication network, the mobile station having a first receiver and a first transmitter in communication with the wireless communication network in at least a first frequency band and a second receiver in receiving transmission in at least a second frequency band As Determining if a change in the transmission parameter of the mobile station causes less interference to reception by the second receiver by transmission of the mobile station; If so determined, sending a message indicative of a communication parameter to the wireless communication network. Way. The method of claim 1, The message indicates a handover target radio channel. Way. The method of claim 1, The message indicates a radio frequency of the second wireless communication network. Way. The method of claim 1, The message indicates a handover target frequency band. Way. The method of claim 1, The message indicates a second wireless communication network. Way. The method of claim 1, The message indicates a handover target system modulation method. Way. The method of claim 1, The message indicates timing information of the second wireless communication network. Way. The method of claim 1, The message indicates timing information of a signal interfering reception by the second receiver. Way. The method of claim 1, The message indicates the type of service received by the second receiver. Way. The method of claim 1, The message is a handover request message. Way. The method of claim 1, The message indicates the power level of the interfering signal. Way. The method of claim 1, The message indicates the transmit or receive power level of the second wireless communication network. Way. The method of claim 1, The message indicates the frequency of the interfering signal. Way. The method of claim 1, The message indicates location information of the mobile terminal. Way. The method of claim 1, Transmitting an indication of at least one transport channel, frequency band or wireless communication network and an indication of an order of preference of the at least one transport channel, frequency band or wireless communication network. Way. The method of claim 1, Sending an indication to the wireless communication network that the reception by the second receiver has ended. Way. The method of claim 1. The message indicates a transmission parameter to be used for transmission from the mobile station to the wireless communication network. Way. The method of claim 1, The message indicates a transmission parameter to be avoided in transmission from the mobile station to the wireless communication network. Way. As a method in a wireless communication system, Receiving a message from a mobile station, Extracting an indication of a communication parameter from the received message; Upon receiving the message, changing a communication parameter of a wireless link between the wireless communication system and the mobile station. Way. The method of claim 19, Initiating a handover to a channel, frequency band or wireless communication system indicated in said message. Way. The method of claim 19, Receiving an indication from the mobile station that the reception by the second receiver in the mobile station has ended; Initiating a handover upon receiving the indication. Way. The method of claim 19, Receiving information from the mobile station regarding reception timing by a second receiver in the mobile station; Adjusting a communication parameter based on the received timing information. Way. The method of claim 19, Receiving from the mobile station information regarding a frequency band received by a second receiver in the mobile station; Selecting a handover target based at least in part on the received information regarding the frequency band; Initiating a handover to the selected handover target. Way. The method of claim 19, Receiving information from the mobile station regarding the type of service received by a second receiver in the mobile station; Selecting a handover target based at least in part on the received information regarding the type of service; Initiating a handover to the selected handover target. Way. The method of claim 23 or 24, The handover target is a channel Way. The method of claim 23 or 24, The handover target is a frequency band Way. The method of claim 23 or 24, The handover target is a wireless communication network Way. A mobile station having a first transmitter and a second receiver in communication with a wireless communication network in at least a first frequency band and a second receiver in the transmission in at least a second frequency band, A controller for determining whether a change in the transmission parameter of the mobile station will cause less interference to reception by the second receiver by transmission of the mobile station; If the determination by the controller is positive, including a transmitter for transmitting a message indicative of a communication parameter to the wireless communication network. Lee Dong-guk. The method of claim 28, A controller for transmitting information regarding reception timing by the second receiver to the wireless communication network; Lee Dong-guk. The method of claim 28, A controller for transmitting information regarding a second frequency band to the wireless communication network Lee Dong-guk. The method of claim 28, A controller for transmitting information regarding the type of service received by the second receiver to the wireless communication network. Lee Dong-guk. The method of claim 28, A controller for transmitting an indication of one or more transport channels, frequency bands or wireless communication networks and an indication of the preference of the one or more transport channels, frequency bands or wireless communication networks. Lee Dong-guk. The method of claim 28, And a controller for transmitting to the wireless communication network an indication that reception by the second receiver has ended when reception by the second receiver is terminated. Lee Dong-guk. A network element for a wireless communication system, A controller for extracting an indication of communication parameters from a message received from the mobile station; A controller for changing a transmission parameter of a radio link between the wireless communication system and the mobile station when extracting a communication parameter from a message received from the mobile station; Network elements. A system in a wireless communication network, A controller for extracting an indication of communication parameters from a message received from the mobile station; A controller for changing a transmission parameter of a radio link between the wireless communication system and the mobile station when extracting a communication parameter from a message received from the mobile station; system. Computer software code means for executing a method according to claim 1 Software Program Product. Computer software code means for executing a method according to claim 19 Software Program Product. A mobile station of a wireless communication network, the mobile station having a first transmitter, a first receiver and at least a second receiver; A controller for determining whether a change in the transmission parameter of the mobile station causes less interference to reception by the second receiver by transmission of the mobile station; If the determination by the controller is positive, a message transmitter for initiating transmission of a message indicative of a communication parameter to the wireless communication network. integrated circuit. The method of claim 38, And an information structure comprising information regarding at least one transmission parameter for the first transmitter causing interference in reception in a channel or frequency band by the second receiver. integrated circuit. The method of claim 38, A calculator for calculating harmonic frequencies of the transmission of the first transmitter, And a controller for determining if a harmonic frequency of transmission by the first transmitter is within a receive channel or frequency band of the second receiver. integrated circuit.

Images