CN102082581B - Mobile communication terminal and realize the method and system that different communication systems coexists - Google Patents

Abstract

The invention discloses a mobile communication terminal, which includes a radio frequency transceiver. A filter is added to the radio frequency transceiver to filter signals within the first specified frequency range in a working state, so that the radio frequency transceiver can transmit and receive The signal within the second specified frequency range is transformed into a signal within the first specified frequency range, and the first specified frequency range is within the second specified frequency range; and the switching device is used to close under the trigger of the corresponding trigger signal, to control the filter to enter the working state; the mobile communication terminal also includes: a trigger signal generating device, which is used to generate a signal for triggering the switching device when it is determined that the mobile communication terminal is in an environment where different systems coexist. closed trigger signal and sent to the switching device. The invention also discloses a corresponding method and system for realizing coexistence of different communication systems.

Description

Mobile communication terminal and method and system for realizing coexistence of different communication systems

technical field

The present invention relates to the technical field of mobile communication, in particular to a mobile communication terminal and a method and system for realizing the coexistence of different communication systems.

Background technique

At present, when different wireless communication systems coexist in the same geographical area, due to the nonlinearity of the transmitter and receiver, there will be mutual interference. If it is not resolved, the system performance will decline, and in severe cases, the system will even fail to work. .

For the transmitter, due to the nonlinearity of devices such as power amplifiers, useless transmission signals will be generated outside the transmission bandwidth. According to the different frequency ranges, the adjacent channel leakage ratio (ACLR, AdjacentChannelLeakageRatio) and spectrum radiation template ( Spectrumemissionmask, SEM) and spurious radiation (spuriousemission), if the index definition is unreasonable, transmitting signals in the operating frequency band of other system receivers will cause the receiver sensitivity of the victim system to be reduced or blocked; for the receiver, Due to the nonlinearity of devices such as amplifiers and mixers, when the interference intensity of the adjacent channel is too high, the intermodulation interference signal generated by the interference signal and the local oscillator of the receiver falls within the receiver bandwidth, which will cause the sensitivity loss of the receiver. And when the attenuation of the receiver filter is insufficient, the excessively strong adjacent channel interference signal may cause the receiver to saturate, and the system cannot work normally.

At present, when different wireless communication systems coexist in the same geographical area, the indicators required for coexistence will be proposed separately for the transmitter of the interference source and the receiver of the victim system. Generally, the coexistence ACLR, SEM and spuriousemission indicators are used as the requirements for the coexistence of transmitters in different communication systems, and the coexistence of adjacent-channel selectivity (ACS, adjacent-channel selectivity) and blocking (blocking) indicators are used as the requirements for the coexistence of receivers in different communication systems .

For example, for the long-term evolution (LTE, LongTermEvolution) communication system, it mainly works in the frequency bands of 2300-2400MHz and 2500-2690MHz, while the wireless local area network (WLAN, WirelessLocalAreaNetworks) communication system mainly works at 2400-2483.5MHz Within the frequency range, if the coexistence problem between the LTE communication system and the WLAN communication system is not properly resolved, it will cause the mobile communication terminal to fail due to using one communication system for communication when it moves into the area covered by the two communication systems. Communication performance is degraded due to interference from signals in another communication system.

Contents of the invention

Embodiments of the present invention provide a mobile communication terminal and its method and system for realizing the coexistence of different communication systems, so as to solve the problem that the communication performance of the mobile communication terminal decreases when the LTE communication system and the WLAN communication system coexist.

In order to solve the above problems, an embodiment of the present invention provides a mobile communication terminal, including a radio frequency transceiver, adding in the radio frequency transceiver: a filter, used to filter signals within the first specified frequency range in the working state, Realize that the radio frequency transceiver is converted from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range, and the first specified frequency range is within the second specified frequency range; Closing under the trigger corresponding to the trigger signal to control the filter to enter the working state; the mobile communication terminal also includes: a trigger signal generating device, which is used to determine that the mobile communication terminal is in an environment where different systems coexist, A trigger signal for triggering the closing of the switching device is generated and sent to the switching device.

An embodiment of the present invention also provides a method for realizing the coexistence of different communication systems, including: when the mobile communication terminal determines that it is in an environment where different systems coexist, generating a trigger for triggering the closing of the switching device added in its own radio frequency transceiver The signal is sent to the switching device; the switching device is closed under the trigger of the closing trigger signal to control the filter added in the radio frequency transceiver to enter the working state; the filter filters the first designated in the working state The signals within the frequency range enable the radio frequency transceiver to convert from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range, and the first specified frequency range is within the second specified frequency range.

An embodiment of the present invention also provides a system for coexistence of different communication systems, including a base station and a mobile communication terminal in the common coverage area of the different communication systems, wherein the base station is used to indicate the system coexistence to the mobile communication terminal instruction; the mobile communication terminal is configured to, when receiving the system coexistence instruction indicated by the base station, generate a trigger signal for triggering the closing of the switching device added in its own radio frequency transceiver and send it to the switching device, the The switch device is closed under the trigger of the corresponding trigger signal to control the filter added in the radio frequency transceiver to enter the working state; the filter filters the signal in the first specified frequency range in the working state to realize the radio frequency transceiver The transmitter changes from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range, and the first specified frequency range is within the second specified frequency range.

In the embodiment of the present invention, a new filter and a switch device are added to the radio frequency transceiver in the mobile communication terminal, and when the mobile communication terminal determines that it is in an environment where different systems coexist, a new switch device for triggering the closing of the new switch device is generated. trigger signal and send it to the newly added switch device; the newly added switch device is closed under the trigger of the corresponding trigger signal to control the newly added filter to enter the working state; the newly added filter can filter the first filter when entering the working state A signal within a specified frequency range, so that the radio frequency transceiver is converted from transmitting and receiving signals within a second specified frequency range to transmitting and receiving signals within a first specified frequency range, wherein the first specified frequency range is within the second specified frequency range. In this way, when the mobile communication terminal enters the coverage area where different wireless communication systems coexist, the frequency band range for sending and receiving signals can be reduced, and a wider frequency band range can be used as a transition band, thereby reducing the frequency range of the current communication system. During communication, the signal in another communication system interferes with itself, thereby improving its own communication performance when it moves into the coverage area where different wireless communication systems coexist.

Description of drawings

The specific implementation manners of the embodiments of the present invention will be described in more detail below in conjunction with each accompanying drawing, wherein in each accompanying drawing:

Fig. 1 is the circuit structural diagram of the first embodiment of adding a filter and a switching device to a radio frequency transceiver in a TDD mobile communication terminal;

Fig. 2 is the circuit structural diagram of the second embodiment of adding filter and switching device to the radio frequency transceiver in the TDD mobile communication terminal;

Fig. 3 is the schematic diagram of the circuit structure of the third embodiment of adding a filter and a switching device to the radio frequency transceiver in the TDD mobile communication terminal;

Fig. 4 is the schematic diagram of the circuit structure of the fourth embodiment of adding a filter and a switching device to the radio frequency transceiver in the TDD mobile communication terminal;

Fig. 5 is the schematic diagram of the circuit structure of the first embodiment of adding a filter and a switching device to the radio frequency transceiver in the FDD mobile communication terminal;

Fig. 6 is the circuit structural diagram of the second embodiment of adding a filter and a switching device to the radio frequency transceiver in the FDD mobile communication terminal;

Fig. 7 is a schematic diagram of the processing procedure of the first embodiment in which the mobile communication terminal generates a corresponding trigger signal;

Fig. 8 is a schematic diagram of the processing procedure of the second embodiment in which the mobile communication terminal generates a corresponding trigger signal;

FIG. 9 is a schematic diagram of a processing procedure of a third embodiment in which a mobile communication terminal generates a corresponding trigger signal;

FIG. 10 is a schematic diagram of a processing procedure of a fourth embodiment in which a mobile communication terminal generates a corresponding trigger signal;

Fig. 11 is a schematic diagram of coexistence of a WLAN communication system and an LTE communication system in an indoor scene.

FIG. 12 is a schematic diagram of coexistence of an FDD communication system and a TDD communication system in an indoor scene.

Detailed ways

For example, the spuriousmission indicator is used here as the indicator requirement for the coexistence of transmitters in the LTE communication system and WLAN communication system, and the blocking indicator is used as the indicator requirement for the coexistence of receivers in the LTE communication system and WLAN communication system. Usually, the spuriousmission indicator for transmitter coexistence is based on the receiver The criterion for sensitivity loss is 0.8dB/3dB, and the blocking index for receiver coexistence is based on the criterion for receiver sensitivity loss caused by intermodulation products of 0.8dB/3dB. According to calculation and analysis, the most serious problem affecting the coexistence of LTE communication system and WLAN communication system is the interference between different mobile communication terminals in the two communication systems, especially when there are both LTE wireless communication systems and WLAN indoors. In a wireless communication system, the spuriousmission interference and blocking interference caused by WLAN terminals to LTE terminals and the spuriousmission interference and blocking interference caused by LTE terminals to WLAN terminals are shown in Table 1 below:

spurious emission interference blocking interference LTE terminal to WLAN terminal 75dB 63dB WLAN terminal to LTE terminal 65dB 71dB

Based on the above analysis, the embodiments of the present invention mainly use the combination of terminal software measurement and hardware functions to solve the coexistence problem between the LTE communication system and the WLAN communication system based on the minimum terminal cost increase, so as to improve the LTE communication system. Spectrum utilization rate and enable LTE mobile communication terminals to improve their own communication performance in an environment where the LTE communication system and the WLAN communication system coexist.

First of all, the mobile communication terminal proposed by the embodiment of the present invention improves the internal software and hardware respectively. The specific improvements include adding filters and switching devices to the original radio frequency transceiver, and implementing a trigger The function module of the signal generating device, the specific functions of these parts are as follows:

The trigger signal generation device is used to judge whether the mobile communication terminal where it is located is in an environment where different communication systems coexist, and if so, generate a trigger signal for triggering the closing of the newly added switch device and send it to the newly added switch device, Optionally, if not, generate a trigger signal for triggering the opening of the newly added switch device and send it to the newly added switch device;

The newly added switch device is used to close or open under the trigger of the corresponding trigger signal to control the newly added filter to enter the normal working state or exit the normal working state;

The newly added filtering device is used to filter the signals within the first specified frequency range when entering the normal working state, so as to realize the conversion of the radio frequency transceiver from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range signals, wherein the first specified frequency range is within the second specified frequency range; optionally, when exiting the normal working state, the radio frequency transceiver is restored to the original state of transmitting and receiving signals within the second specified frequency range.

By improving the software and hardware in the mobile communication terminal as described above, it can be realized that when the mobile communication terminal enters the coverage area where different wireless communication systems coexist, the frequency band range for sending and receiving signals by itself is reduced, and the vacant frequency band range is used as a transition zone. And when moving out of the coverage area where different wireless communication systems coexist, restore the use of the original frequency range to send and receive signals, thereby reducing the interference caused by signals in another communication system to itself when using the current communication system for communication, thereby improving own communication performance. In addition, the cost of high-pass or low-pass or band-pass filters and switches added to the original radio frequency transceiver is relatively low, so the implementation cost of the embodiments of the present invention is reduced, and the radio frequency transceiver in the mobile communication terminal Only when the terminal is in a system coexistence environment can the transceiver work in a narrower frequency range. When the terminal is not in a system coexistence environment, the RF transceiver will resume using the original wider frequency range, thereby better improving spectrum utilization. Rate.

The above-mentioned improvements proposed by the embodiments of the present invention may be, but not limited to, improving Time Division Duplex (TDD, TimeDivisionDuplex) mobile communication terminals and Frequency Division Duplex (FDD, FrequencyDivisionDuplex) mobile communication terminals.

As shown in Figure 1, it is a schematic diagram of the circuit structure of the first embodiment of adding filters and switching devices to the radio frequency transceiver in the TDD mobile communication terminal. A new set of filters and switchgear has been added.

As shown in Figure 2, it is a schematic diagram of the circuit structure of the second embodiment of adding a filter and a switching device to the radio frequency transceiver in the TDD mobile communication terminal. In this figure, the transmitter and receiver in the radio frequency transceiver share at least one group Added filter and switchgear.

In the above Figure 1, FL1, FL2, FL3, S1, S2, S3, and S4 are all newly added components, FL4 and FL5 are band-pass filters, and the pass band is determined by the operating frequency band of the terminal, which is generally equal to the working The bandwidth of the frequency band. FL1 and S1 are optional, depending on whether the spuriousemission index after the power amplifier meets the specification requirements to determine whether they are needed. , if FL1 is a low-pass filter, the cut-off point of its passband should be between the lowest and highest frequency of the terminal’s normal operating frequency band; if FL1 is a high-pass filter, its passband starting point should be located between the lowest and highest frequency of the terminal’s normal operating frequency band Between frequencies, the passband of FL2-FL3 should be smaller than the bandwidth of the normal working frequency band, which is determined by the coexistence requirements and terminal implementation capabilities.

In the above Figure 2, FL1, FL2, S1, S2, S3, and S4 are all newly added components, FL3 and FL4 are band-pass filters, and the pass band is determined by the operating frequency band of the terminal, which is generally equal to the bandwidth. FL1 and S2 are optional, depending on whether the spuriousemission index after the power amplifier meets the specification requirements to determine whether they are needed. The passband of FL1-FL2 should be smaller than the bandwidth of the normal working frequency band, which is determined by the coexistence requirements and terminal implementation capabilities.

As shown in Figure 3, it is a schematic diagram of the circuit structure of the third embodiment of adding filters and switching devices to the radio frequency transceiver in the TDD mobile communication terminal. In this figure, the newly added filters in the radio frequency transceiver are connected in series Together, and the transmitter and receiver in the radio frequency transceiver use at least one set of newly added filter and switch devices independently.

In Figure 3, FL1, FL2, FL3, S1, S2, S3, and S4 are all newly added components. FL4 and FL5 are bandpass filters. The passband is determined by the working frequency band of the terminal, which is generally equal to the bandwidth of the working frequency band. FL1 and S1 are optional, depending on whether the spuriousemission indicators after the power amplifier meet the specification requirements to determine whether they are needed; if FL1-FL3 are low-pass filters, their passband cut-off points should be located at the lowest and highest frequencies of the normal operating frequency band of the terminal If FL1-FL3 are high-pass filters, the starting point of the passband should be between the lowest and highest frequency of the terminal's normal working frequency band, which is determined by the coexistence requirements and the terminal's implementation capabilities.

As shown in Figure 4, it is a schematic diagram of the circuit structure of the fourth embodiment of adding filters and switching devices to the radio frequency transceiver in the TDD mobile communication terminal. In this figure, the newly added filters in the radio frequency transceiver are connected in series together, and the transmitter and receiver in the radio frequency transceiver share at least one set of added filters and switching devices.

As shown in Figure 5, it is a schematic diagram of the circuit structure of the first embodiment of adding filters and switching devices to the radio frequency transceiver in the FDD mobile communication terminal. In this figure, the transmitter and receiver in the radio frequency transceiver share at least one group Added filter and switchgear.

In the above Figure 4 and Figure 5, FL1, FL2, S1, S2, S3, and S4 are all newly added components, FL3 and FL4 are band-pass filters, and the pass band is determined by the working frequency band of the terminal, which is generally equal to the working The bandwidth of the frequency band. FL1 and S1 are optional, and whether they are needed depends on whether the spuriousemission indicators after the power amplifier meet the specification requirements; the passband of FL1-FL2 should be smaller than the bandwidth of the normal working frequency band, which is determined by the coexistence requirements and terminal implementation capabilities.

As shown in Figure 6, it is a schematic diagram of the circuit structure of the second embodiment of adding filters and switching devices to the radio frequency transceiver in the FDD mobile communication terminal. In this figure, the newly added filters in the radio frequency transceiver are connected in series Together, and the transmitter and receiver in the radio frequency transceiver use at least one set of newly added filter and switch devices independently.

In the above Figure 6, FL1, FL2, FL3, S1, S2, S3, S4, and S5 are all newly added components, FL4 and FL5 are band-pass filters, and the pass band is determined by the operating frequency band of the terminal, which is generally equal to The bandwidth of the operating frequency band. FL1 and S1 are optional, depending on whether the spuriousemission indicators after the power amplifier meet the specification requirements to determine whether they are needed. If it is a low-pass filter, the cut-off point of its passband should be between the lowest and highest frequency of the normal operating frequency band of the terminal. If FL1-FL3 is a high-pass filter, the starting point of its passband should be located between the lowest and highest frequency of the normal operating frequency band of the terminal. Between frequencies, it is determined by coexistence requirements and terminal implementation capabilities.

Based on the above improvements to the hardware structure of the radio frequency transceiver in the mobile communication terminal, the trigger signal generating device inside the mobile communication terminal can generate a corresponding trigger signal and send it to the newly added switch in the radio frequency transceiver, but not limited to the following methods device.

Specifically, if the LTE communication system occupies the 2300-2400MHz frequency band, and there are both LTE communication systems and WLAN communication systems indoors, LTE mobile communication terminals can be required to work in the low frequency band of the 2300-2400MHz frequency band, for example, to work in the 2300-2400MHz frequency band. In the 2340MHz frequency band, a low-pass filter LPF (the passband cut-off point of the LPF is 2340MHz) and a switch can be installed after the radio frequency filter (the passband of the radio frequency filter is 2300-2400MHz) inside the mobile communication terminal. switcher.

As shown in FIG. 7 , it is a schematic diagram of the processing procedure of the first embodiment for generating a corresponding trigger signal for a mobile communication terminal, wherein:

A network signal (network signal) can be pre-defined, for example, the IE defined in SIB2 in TS36.3316.3.1 can be used: additional SpectrumEmission signaling, which is configured by the network side and under the base station in the indoor LTE communication system hair.

Step 70, the LTE base station in the coverage area where the LTE communication system and the WLAN communication system coexist will carry the system coexistence instruction in the broadcast system information (such as SIB2), so as to notify the LTE terminal entering the system coexistence coverage area that it has Enter the coverage area where the LTE communication system and the WLAN communication system coexist; the mobile communication terminal can judge at any time or periodically whether the system information (such as SIB2) issued by the serving base station where it is currently located carries a system coexistence instruction. If you have not moved into the coverage area where the LTE communication system and the WLAN communication system coexist, or moved out of the coverage area where the LTE communication system and the WLAN communication system coexist, you will not detect system coexistence in the system information (such as SIB2) broadcast by your current serving base station Instructions, such as NS_08 (only NS_07 is used in the existing LTE terminal radio frequency standard TS36.101), then perform step 71; if the mobile communication terminal moves into the coverage area where the LTE communication system and the WLAN communication system coexist, it will be in its current service When a system coexistence instruction, such as NS_08, is detected in the system information (such as SIB2) broadcast by the base station, step 73 is performed;

Step 71, the mobile communication terminal generates a trigger signal for triggering the opening of the newly added switch device in the radio frequency transceiver and sends it to the newly added switch device;

Step 72, the switch device added in the radio frequency transceiver is turned on under the trigger of the trigger signal so that the newly added low-pass filter exits the normal and effective working state, so that the radio frequency transceiver of the mobile communication terminal can work in full In the frequency range of 2300-2400MHz;

Step 73, the mobile communication terminal generates a trigger signal for triggering the closing of the newly added switching device in the radio frequency transceiver and sends it to the newly added switching device;

Step 74, the newly-added switching device in the RF transceiver is closed under the trigger of the closing trigger signal so that the newly-added low-pass filter enters a normal and effective working state, so that the RF transceiver of the mobile communication terminal can work in full In the low-frequency range of 2300-2340MHz in the frequency range of 2300-2400MHz, the passband of the low-pass filter is only 40MHz in the low-frequency range, and the transition band is 60MHz, which can meet the requirements of filter attenuation and reduce LTE terminals entering LTE communication When the coverage area where the system and the WLAN communication system coexist, the interference caused by the signal in the WLAN communication system improves its communication performance.

As shown in FIG. 8 , it is a schematic diagram of the processing procedure of the second embodiment for generating a corresponding trigger signal for a mobile communication terminal. Its implementation process is roughly similar to the implementation process in FIG. 7 above, and the judgment step in step S70 is the same as that in FIG. 8 There are differences in the steps. The judging steps in FIG. 8 are specifically: during the handover process, the mobile communication terminal detects whether the handover command (Handovercommand) message sent by the serving base station where the mobile communication terminal is currently located carries the notification of the target (target) base station to which the mobile communication terminal is to be handed over. The system coexistence command, if it is carried, it is determined that the area to be switched to is a system coexistence area, and if it is not carried, it is determined that the area to be switched to is a non-system coexistence area. The subsequent execution process is similar to the subsequent execution process in FIG. 7 , and will not be repeated here.

As shown in FIG. 9 , it is a schematic diagram of the processing procedure of the third embodiment for generating a corresponding trigger signal for a mobile communication terminal, wherein:

Step 90, the mobile communication terminal judges whether the signal-to-interference ratio (SINR, Signalinterferenoiseratio) or the channel quality indicator (CQI, ChannelQualityIndicator) detected in the continuous predetermined number of receiving time windows is lower than the first preset threshold value, if Yes, go to step 91, otherwise go to step 93;

Step 91, the mobile communication terminal judges whether the received signal power values of intrafrequency cells (intrafrequency cells) other than the serving cell are lower than a second preset threshold value, wherein the received signal power values include but are not limited to Reference Signal Received Power (RSRP , ReferenceSignalReceivedPower) value or received signal strength indicator (RSSI, ReceivedSignalStrengthIndicator) value, to exclude the possibility that the interference originates from the intrafrequencycell, if yes, execute step 92, otherwise execute step 93;

Step 92, the mobile communication terminal judges whether the signal received power value (such as the RSRP value) of the interfrequency cell (interfrequency cell) is lower than the third preset threshold value, so as to eliminate the possibility that the interference originates from the interfrequency cell, and if so, execute step 94 , otherwise execute step 93;

Step 93, the mobile communication terminal generates a trigger signal for triggering the opening of the newly added switch device in the radio frequency transceiver and sends it to the newly added switch device;

Step 94, the switch device added in the radio frequency transceiver is turned on under the trigger of the trigger signal so that the newly added low-pass filter exits the normal and effective working state, so that the radio frequency transceiver of the mobile communication terminal can work in full In the frequency range of 2300-2400MHz;

Step 95, the mobile communication terminal generates a trigger signal for triggering the closing of the newly added switching device in the radio frequency transceiver and sends it to the newly added switching device;

Step 96, the switch device added in the radio frequency transceiver is closed under the trigger of the closing trigger signal so that the newly added low-pass filter enters a normal and effective working state, so that the radio frequency transceiver of the mobile communication terminal can work in full In the low-frequency range of 2300-2340MHz in the frequency range of 2300-2400MHz, the passband of the low-pass filter is only 40MHz in the low-frequency range, and the transition band is 60MHz, which can meet the requirements of filter attenuation and reduce LTE terminals entering LTE communication When the coverage area where the system and the WLAN communication system coexist, the interference caused by the signal in the WLAN communication system improves its communication performance.

As shown in Figure 10, it is a schematic diagram of the processing process of the fourth embodiment for generating a corresponding trigger signal for a mobile communication terminal. There are differences in the steps. The judging step in FIG. 10 is specifically as follows: the mobile communication terminal judges whether the block error rate (BLER, BlockErrorRatio) values detected in a continuous specified number of receiving time windows are all higher than the fourth preset threshold Value, if yes, execute the subsequent step 91 in the above-mentioned FIG. 9, otherwise execute the above-mentioned step 93 in the above-mentioned FIG. 9, the subsequent execution process is similar to the subsequent execution process of the above-mentioned FIG.

Through the various embodiments of generating corresponding trigger signals above, it can be seen that when the mobile communication terminal determines that the interference is from other external communication systems, it will further activate the low-frequency band filter device installed in its own radio frequency transceiver, and the mobile communication terminal will pass through the closed The switch equipment installed in the radio frequency transceiver itself makes the low-pass filter LPF installed in the radio frequency transceiver start to work effectively, which is equivalent to the passband of the low-pass filter being only 40MHz in the low frequency band, and the transition band becomes 60MHz, thus It can meet the requirements of filter attenuation, and it works in the same frequency range as the indoor base station, so there will be no problem of scheduling errors, and there is no need to redefine a new frequency band. In addition, the frequency range of 2300-2340 MHz used indoors by LTE is just an example, and the specific low frequency range can be determined according to factors such as actual traffic requirements and implementation requirements of filters installed on mobile communication terminals.

Figure 11 shows a schematic diagram of the coexistence of a WLAN communication system and an LTE communication system in an indoor scene. Assuming that the indoor base station of the LTE communication system works in the frequency range of 2300-2340 MHz, the following provides the embodiment 1 and implementation based on the principle of the solution of the present invention Example 2 and Example 3.

Embodiment 1: TDD terminal switching

When a TDD terminal is handed over from an outdoor base station to an indoor base station, since the indoor base station and the wireless access point AP in the WLAN communication system are in the same geographical coverage area, additional coexistence radio frequency index requirements are required, and the indoor target cell to which the TDD terminal is handed over ( targetcell) needs to notify the outdoor current serving cell (serving cell) to configure coexistence requirement signaling to the TDD terminal in the mobility control information element (Mobilitycontrolinformationelements) in HandoverCommand, such as NS_08 signaling, to prevent the random access request message initiated by the TDD terminal to the targetcell And after the access is completed, the power of normal data transmission exceeds the threshold value (for details of the threshold value, please refer to the AdditionalSpectrumEmission signaling part in TS36.3316.3.4Mobilitycontrolinformationelements), when the TDD terminal retrieves in the Mobilitycontrolinformationelements in the received HandoverCommand When the NS_08 signaling is received, close the newly-added switches in Figures 1 to 4, so that the newly-added low-pass filter starts to work effectively, which is equivalent to changing the passband of the RF filter to the low-frequency band when the TDD terminal moves indoors 40MHz, the frequency range between 2340-2400MHz 60MHz can be used as the transition band of the RF filter to meet the filtering requirements required for the coexistence of the LTE communication system and the WLAN communication system, and the frequency range of the indoor base station is the same as or larger than the actual indoor deployment In the frequency range, there will be no problem of scheduling errors; when the terminal is about to switch to the outdoor base station, because no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the new switch is turned on, so that the newly added The low-pass filter does not work, so when the TDD terminal moves outdoors, the passband of the radio frequency filter returns to 100MHz, which can meet the normal working state of the LTE communication system when it exists alone.

In addition, when the terminal is about to switch to the outdoor base station, since no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the newly added switch is turned on, so that the newly added low-pass filter does not work, and the terminal can Select the frequency range of the current outdoor communication system to continue working. For example, when the terminal is switched outdoors, and the system where the terminal is currently located is a CDMA system, the terminal can turn on the working frequency band occupied by the CDMA system to continue communication.

Embodiment 2: TDD terminal access or cell reselection

When a TDD terminal is about to initiate an access request or a cell reselection request to the base station in the indoor LTE communication system, since the indoor base station and the wireless access point AP in the WLAN communication system are in the same geographic coverage area, additional coexistence is required. According to radio frequency index requirements, the base station needs to configure coexistence requirement signaling to the terminal in the system broadcast information SIB (such as SIB2), such as NS_08 signaling, to prevent the random access request message initiated by the terminal to the target cell and the normal data transmission after the access is completed. When the power exceeds the threshold value, when the TDD terminal retrieves the NS_08 signaling in the SIB2 of the system broadcast information of the target cell, it closes the newly added switches in Figure 1 to Figure 4, so that the newly added low-pass filter starts to work effectively, which is equivalent to When the TDD terminal moves indoors, the passband of the RF filter becomes 40MHz in the low frequency band, and the 60MHz between 2340-2400MHz can be used as the transition band of the RF filter to meet the filtering required for the coexistence of the LTE communication system and the WLAN communication system Requirements, and the frequency range of the indoor base station is the same as or greater than the actual indoor deployment frequency range, and there will be no problem of scheduling errors; when the terminal is going to initiate an access request or a cell reselection request to the base station LTEBS in the outdoor LTE communication system , since the NS_08 signaling is not detected in the system information SIB2 broadcast by LTEBS, the newly added switch is turned on, so that the newly added low-pass filter does not work, so that the passband of the RF filter is restored to 100MHz when the TDD terminal moves outdoors , which can satisfy the normal working state when the LTE communication system exists alone.

In addition, when the terminal is about to switch to the outdoor base station, since no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the newly added switch is turned on, so that the newly added low-pass filter does not work, and the terminal can Select the frequency range of the current outdoor communication system to continue working. For example, when the terminal is switched outdoors, and the system where the terminal is currently located is a CDMA system, the terminal can turn on the working frequency band occupied by the CDMA system to continue communication.

Embodiment 3: TDD terminal detects its own signal:

When a TDD terminal moves into an indoor environment where the LTE communication system and the WLAN communication system coexist, the base station in the LTE communication system in the indoor coexistence area only works within a frequency within the operating frequency range of the frequency band, such as 2300-2340MHz If the TDD terminal detects that the SINR value or CQI value is lower than the preset threshold value 1 in the continuous receiving time window, and detects that the RSRP value of the Intrafrequency cell is lower than the preset threshold value 2, and detects The RSRP value to the Interfrequencycell is less than the preset threshold value 3. After the above three conditions are met, it can basically be judged that the strong adjacent frequency external interference received by itself is from another communication system (such as a WLAN communication system), then Close the newly added switches in Figure 1 to Figure 4, so that the newly added low-pass filter starts to work effectively, which is equivalent to the passband of the RF filter when the TDD terminal moves indoors becomes a low frequency band of 40MHz, between 2340-2400MHz The 60MHz can be used as the transition band of the radio frequency filter to meet the filtering requirements required for the coexistence of the LTE communication system and the WLAN communication system, and it is the same frequency range as the indoor base station, so there will be no problem of scheduling errors; subsequent TDD terminals are moving When it is detected that any one of the above three conditions is not met when going outdoors, turn on the newly added switches in Figure 1 to Figure 4, so that the newly added low-pass filter will stop working effectively, so that the TDD terminal is moving When going outdoors, the passband of the radio frequency filter will return to 100MHz, which can meet the normal working state of the LTE communication system when it exists alone.

In addition, when the terminal is about to switch to the outdoor base station, since no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the newly added switch is turned on, so that the newly added low-pass filter does not work, and the terminal can Select the frequency range of the current outdoor communication system to continue working. For example, when the terminal is switched outdoors, and the system where the terminal is currently located is a CDMA system, the terminal can turn on the working frequency band occupied by the CDMA system to continue communication.

On the basis of the above Figure 11, assuming that the indoor base station of the LTE communication system works in the frequency range of 2500-2570MHz or 2620-2690MHz, the following provides the embodiment 4 and embodiment 5 based on the principle of the solution of the present invention.

Embodiment 4: FDD terminal switching

In order to meet the coexistence requirements of the LTE communication system and the WLAN communication system, the indoor base stations in the LTE communication system work in the frequency range of 70MHz and 40MHz, that is, in the frequency range of 2530-2570MHz or 2650-2690MHz. When an FDD terminal switches from outdoor to indoor, since the indoor base station and the wireless access point AP in the WLAN communication system are in the same geographic coverage area, additional coexistence radio frequency index requirements are required, and the target cell to which the terminal switches needs to notify the current serving cell In the Mobilitycontrolinformationelements in HandoverCommand, configure coexistence requirement signaling for the FDD terminal, such as NS_08 signaling, to prevent the random access request message initiated by the terminal to the target cell and the normal data transmission power after the access is completed. When the FDD terminal receives If the NS_08 signaling is retrieved from the Mobilitycontrolinformationelements in the HandoverCommand, close the newly added switches in Figure 5 to Figure 6, so that the newly added high-pass filter starts to work effectively, which is equivalent to the RF filter when the FDD terminal moves indoors The passband becomes 40MHz in the high frequency band, and the 30MHz between 2500-2530MHz or 2620-2650MHz can be used as the transition band of the RF filter to meet the filtering requirements required for coexistence, and the frequency range is the same as that of the indoor base station or greater than the actual indoor Deploy the frequency range, and there will be no problem of scheduling errors; when the FDD terminal is ready to switch to the outdoor base station, because the NS_08 signaling is not detected in the Mobilitycontrolinformationelements in the received HandoverCommand, the new switch is turned on, so that the newly added Qualcomm The filter does not work, so when the FDD terminal moves outdoors, the passband of the radio frequency filter returns to 70MHz, which can meet the normal working state of the LTE communication system when it exists alone.

In addition, when the terminal is about to switch to the outdoor base station, since no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the newly added switch is turned on, so that the newly added low-pass filter does not work, and the terminal can Select the frequency range of the current outdoor communication system to continue working. For example, when the terminal is switched outdoors, and the system where the terminal is currently located is a CDMA system, the terminal can turn on the working frequency band occupied by the CDMA system to continue communication.

Embodiment 5: FDD terminal access or cell reselection

When the FDD terminal is about to initiate an access request or a cell reselection request to the indoor base station, since the indoor base station and the wireless access point AP in the WLAN communication system are in the same geographical coverage area, additional coexistence radio frequency index requirements are required, and the base station needs to In the system broadcast information SIB (such as SIB2), configure coexistence requirement signaling for FDD terminals, such as NS_08 signaling, to prevent the random access request message initiated by the terminal to the target cell and the power of normal data transmission after the access is completed to exceed the threshold , when the FDD terminal detects the NS_08 signaling in SIB2, it closes the newly added switches in Figures 5 to 6, so that the newly added high-pass filter starts to work effectively, which is equivalent to the RF filtering of the FDD terminal when it moves indoors The passband of the filter becomes 40MHz in the high frequency band, and the 30MHz between 2500~2530MHz or 2620~2650MHz can be used as the transition band of the RF filter to meet the filtering requirements required for the coexistence of the LTE communication system and the WLAN communication system, and work with indoor base stations The frequency range is the same as or larger than the actual indoor deployment frequency range, and there will be no problem of scheduling errors; when the FDD terminal is about to initiate an access request or cell reselection request to the base station LTEBS in the outdoor LTE communication system, since there is no broadcast on the LTEBS When the NS_08 signaling is received in the system information SIB2, the new switch is turned on, so that the new high-pass filter does not work, so that when the FDD terminal moves outdoors, the passband of the RF filter is restored to 70MHz, which can meet the requirements of the LTE communication system alone. normal working condition when present.

In addition, when the terminal is about to switch to the outdoor base station, since no coexistence signaling is detected in the Mobilitycontrolinformationelements in the received HandoverCommand, such as NS_08, the newly added switch is turned on, so that the newly added low-pass filter does not work, and the terminal can Select the frequency range of the current outdoor communication system to continue working. For example, when the terminal is switched outdoors, and the system where the terminal is currently located is a CDMA system, the terminal can turn on the working frequency band occupied by the CDMA system to continue communication.

The above-mentioned embodiments of the present invention are only described by taking the coexistence of an LTE communication system and a WLAN communication system as a special case. Of course, the implementation principle of the solution of the present invention can also be applied to any other coexistence environment of different communication systems, such as the third generation mobile communication network ( Coexistence between WCDMA network, CDMA2000 network and TD-SCDMA network) and WLAN network, or coexistence between different mobile communication systems (such as the coexistence of FDD terminals occupying the frequency range of 1920-1980MHz and TDD terminals occupying 1880-1920MHz, or the coexistence of TDD terminals occupying 1880MHz - TDD terminals in the frequency range of 1920MHz coexist with FDD terminals occupying the frequency range of 1805-1880MHz, or TDD terminals occupying the frequency range of 2570-2620MHz coexist with FDD terminals occupying the frequency range of 2620-2690MHz, etc.), the embodiments of the present invention can also be adopted The principles set forth above. As shown in FIG. 12 , a schematic diagram of coexistence of a TDD communication system and an FDD communication system in an indoor scene is given.

Through the detailed introduction of the above-mentioned embodiments of the present invention, it can be seen that the present invention installs a new high-pass or low-pass or band-pass filter in the radio frequency transceiver of the mobile communication terminal, and controls the high-pass or low-pass or band-pass filter to enter or For the switchgear that exits the normal working state, because the additional devices are all relatively low in cost, the solution of the present invention can be implemented based on low cost, and when the mobile communication terminal moves into the coverage area where different communication systems coexist, it can be used in the original Working within the range of frequency bands, the range of occupied frequency bands is reduced, and there is no need to redefine the frequency bands, so the occupancy rate of spectrum resources can be improved, and the problem of terminal scheduling errors can also be avoided. In addition, there are many implementation methods for the network side to indicate the network coexistence instruction of the mobile communication terminal. Preferably, a new indication of this signaling can be used in TS36.101 to indicate the requirement instruction of system coexistence, such as NS_08 signaling, etc. It is more convenient to realize, and the improvement to the network system is small.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (23)

1. A mobile communication terminal, comprising a radio frequency transceiver, is characterized in that, in the radio frequency transceiver: The filter is used to filter signals within the first specified frequency range in the working state, so as to realize that the radio frequency transceiver converts from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range. one designated frequency band range is within a second designated frequency band range; and The switch device is used to close when triggered by the corresponding trigger signal, so as to control the filter to enter the working state; The mobile communication terminal also includes: a trigger signal generating device, configured to generate a trigger signal for triggering the closing of the switch device and send it to the switch device when it is determined that the mobile communication terminal is in an environment where different systems coexist; Wherein, the trigger signal generating device is further configured to generate a trigger signal for triggering the opening of the switch device and send it to the switch device when it is determined that the mobile communication terminal is not in an environment where different systems coexist; The switch device is also configured to be turned on when triggered by a corresponding trigger signal, so as to control the filter to exit the working state; The filter enables the radio frequency transceiver to resume sending and receiving signals within the second specified frequency range when the filter is in an exit working state. 2. The mobile communication terminal according to claim 1, wherein the trigger signal generating device is configured to determine whether the mobile communication terminal is in a different system by determining whether a system coexistence instruction indicated by the network side is received. environment of coexistence. 3. The mobile communication terminal according to claim 2, wherein the trigger signal generating device is configured to determine whether the system coexistence instruction is carried by detecting whether the system information broadcast by the serving base station where the mobile communication terminal is currently located carries a system coexistence instruction. The system coexistence command indicated by the network side is received. 4. The mobile communication terminal according to claim 2, wherein the trigger signal generating device is configured to detect whether the handover command message issued by the current serving base station carries the handover command message of the mobile communication terminal during the handover process. The received target base station notifies the current serving base station of the system coexistence instruction to determine whether the system coexistence instruction indicated by the network side is received. 5. The mobile communication terminal according to claim 1, wherein the trigger signal generating means is configured to judge whether it is detected that the channel quality indicator value or the SINR value is lower than the first number of time windows within a specified number of time windows. A predetermined threshold value, and it is detected that the signal receiving power value of other same-frequency cells except the serving cell is lower than the second predetermined threshold value, and it is detected that the signal receiving power value of inter-frequency cells is lower than the third set threshold value, If yes, it is determined that the mobile communication terminal is in an environment where different systems coexist, and if otherwise, it is determined that the mobile communication terminal is not in an environment where different systems coexist. 6. The mobile communication terminal according to claim 1, wherein the trigger signal generating means is configured to judge whether it is detected that the block error rate values are higher than the fourth predetermined threshold within a specified number of time windows value, and it is detected that the signal receiving power value of other same-frequency cells except the serving cell is lower than the second predetermined threshold value, and it is detected that the signal receiving power value of inter-frequency cells is lower than the third preset threshold value, if so, determine the The mobile communication terminal is in an environment where different systems coexist, otherwise it is determined that the mobile communication terminal is not in an environment where different systems coexist. 7. The mobile communication terminal according to claim 1, wherein the transmitter and the receiver in the radio frequency transceiver share at least one set of the filter and switching means. 8. The mobile communication terminal of claim 1, wherein a receiver in said radio frequency transceiver uses at least one set of said filter and switching means. 9. The mobile communication terminal of claim 8, wherein a transmitter in said radio frequency transceiver uses at least one other set of said filter and switching means. 10. The mobile communication terminal according to any one of claims 1 to 9, wherein the mobile communication terminal is a time division duplex mobile communication terminal, or a frequency division duplex mobile communication terminal. 11. A method for realizing coexistence of different communication systems, comprising: When the mobile communication terminal determines that it is in an environment where different systems coexist, it generates a trigger signal for triggering the closing of the switch device added in its radio frequency transceiver and sends it to the switch device; The switching device is closed under the trigger of the closing trigger signal to control the filter added in the radio frequency transceiver to enter the working state; The filter filters signals within the first specified frequency range in the working state, so that the radio frequency transceiver is converted from transmitting and receiving signals within the second specified frequency range to transmitting and receiving signals within the first specified frequency range, and the first The designated frequency band range is within the second designated frequency band range; The method also includes: When the mobile communication terminal determines that it is not in an environment where different systems coexist, it generates a trigger signal for triggering the switch device to be turned on and sends it to the switch device; The switch device is turned on under the trigger of the turn-on trigger signal to control the filter to exit the working state; The filter enables the radio frequency transceiver to resume sending and receiving signals within the second specified frequency range when the filter is in an exit working state. 12. The method according to claim 11, wherein the mobile communication terminal determines whether it is in an environment where different systems coexist, comprising: When the mobile communication terminal receives the system coexistence instruction indicated by the network side, it determines that it is in an environment where different systems coexist; and When the system coexistence instruction indicated by the network side is not received, it is determined that the system itself is not in an environment where different systems coexist. 13. The method according to claim 12, wherein the mobile communication terminal judges whether it has received the system coexistence instruction indicated by the network side by detecting whether the system information broadcast by the currently serving base station carries the system coexistence instruction . 14. The method according to claim 12, wherein the mobile communication terminal notifies the current serving base station by detecting whether the handover command message issued by the current serving base station carries the target base station to be handed over to during the handover process system coexistence instruction to determine whether the system coexistence instruction indicated by the network side is received. 15. The method according to claim 11, wherein the mobile communication terminal determines whether it is in an environment where different systems coexist, comprising: The mobile communication terminal judges whether it detects that the channel quality indicator value or the signal-to-interference-noise ratio value is lower than the first predetermined threshold value within a specified number of time windows, and detects the signal receiving power value of other cells of the same frequency except the serving cell It is lower than the second predetermined threshold value, and it is detected that the received power value of the inter-frequency cell signal is lower than the third set threshold value, if so, determine that it is in an environment where different systems coexist; otherwise Make sure you are not in an environment where different systems coexist. 16. The method according to claim 11, wherein the mobile communication terminal determines whether it is in an environment where different systems coexist, comprising: The mobile communication terminal judges whether it detects that the block error rate values are higher than the first predetermined threshold value within a specified number of time windows, and detects that the signal receiving power values of other co-frequency cells except the serving cell are lower than the first predetermined threshold value. Two predetermined thresholds, and it is detected that the received power value of the inter-frequency cell signal is lower than the third set threshold, if so, determine that the self is in an environment where different systems coexist; otherwise Make sure you are not in an environment where different systems coexist. 17. The method according to claim 11, wherein the coexistence of different communication systems comprises the coexistence of a mobile communication system and a wireless local area network communication system. 18. The method according to claim 17, wherein the mobile communication system occupies the second designated frequency range, and the occupied frequency range is lower than the frequency range occupied by the wireless local area network communication system, then the second The first designated frequency range is within the lower frequency range of the second designated frequency range; The mobile communication system occupies the second specified frequency range, and the occupied frequency range is higher than the frequency range occupied by the wireless local area network communication system, then the first specified frequency range is within the high frequency range of the second specified frequency range . 19. The method according to claim 11, wherein the coexistence of different communication systems comprises the coexistence of the first mobile communication system and the second mobile communication system. 20. The method according to claim 19, wherein the first mobile communication system occupies the second designated frequency range, and the occupied frequency range is lower than the frequency range occupied by the second mobile communication system, then The first specified frequency range is within the low frequency range of the second specified frequency range; The first mobile communication system occupies the second designated frequency band range, and the occupied frequency band range is higher than the frequency band range occupied by the second mobile communication system, then the first designated frequency band range is higher than the second designated frequency band range within the frequency range. 21. A system in which different communication systems coexist, characterized in that it includes a base station and a mobile communication terminal within the common coverage area of the different communication systems, wherein: The base station is configured to indicate a system coexistence instruction to the mobile communication terminal; The mobile communication terminal is configured to, when receiving the system coexistence instruction indicated by the base station, generate a trigger signal for triggering the closing of a switching device added in its own radio frequency transceiver and send it to the switching device, and the switching device Closed under the trigger of the corresponding trigger signal to control the added filter in the radio frequency transceiver to enter the working state; the filter filters the signal in the first specified frequency band under the working state, so that the radio frequency transceiver is controlled by Transmitting and receiving signals within the second specified frequency range is converted into transmitting and receiving signals within the first specified frequency range, and the first specified frequency range is within the second specified frequency range; Wherein, the mobile communication terminal is further configured to generate a trigger signal for triggering the opening of the switching device and send it to the switching device when the system coexistence instruction indicated by the base station is not received; The trigger signal is turned on to control the filter to exit the working state; the filter enables the radio frequency transceiver to resume sending and receiving signals within the second specified frequency range when the filter is in the exiting working state. 22. The system according to claim 21, wherein the base station is the current serving base station of the mobile communication terminal, and the system information broadcast by the base station carries the system coexistence instruction to the mobile communication terminal. The terminal indicates the system coexistence command. 23. The system according to claim 21, wherein the base station is the current serving base station of the mobile communication terminal during the handover process, and the handover command message issued by the base station carries the information required by the mobile communication terminal. The system coexistence instruction notified by the handover target base station indicates the system coexistence instruction to the mobile communication terminal.