JP3781543B2 - Wireless terminal, wireless base station apparatus and wireless system using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radio base station apparatus such as a mobile phone and a wireless local loop, and a radio system using the same.
[0002]
[Prior art]
Conventionally, as a fault detection (fault detection) function in a radio base station apparatus such as a mobile phone or a wireless local loop and a radio system using the same, for example, as shown in Japanese Patent Laid-Open No. 6125561, a time division duplex There is known a loopback method in which a part of the output of the transmission unit of the radio base station is input to the reception unit.
[0003]
Further, as a fault detection (failure detection) function in this type of radio base station apparatus and a radio system using the radio base station apparatus, for example, as shown in Japanese Patent Laid-Open No. 8-274727, radio in TDD (time division duplex) There is known a method of measuring a bit error rate (BER) of a digital demodulated signal by inputting a part of the output of the transmission unit of the base station to the reception unit.
[0004]
Further, as a fault detection (fault detection) function in this type of radio base station apparatus and a radio system using the same, for example, as shown in Japanese Patent Laid-Open No. 8-232298, a plurality of TDD (Time Division Duplex System) There is known a method of detecting a failure by performing wireless communication between wireless base stations.
[0005]
In addition, in this type of radio base station apparatus and a radio system using the same, the peripheral monitoring function in the radio communication system in which the transmission frequency and the reception frequency of the radio base station apparatus are different, such as frequency division duplex (FDD), As shown in FIG. 16, an antenna for receiving a transmission frequency (downlink frequency) and a receiving unit are separately provided to monitor the downlink frequency band. The conventional example will be described below with reference to FIG.
[0006]
In FIG. 16, the periphery monitoring function in the conventional radio communication system is performed in the radio base station apparatus 100 by a downlink frequency transmission unit 200, an uplink frequency reception unit 300, an antenna duplexer 400, a transmission / reception shared antenna 500, and a reception The antenna 600 and the downlink frequency receiving unit 700 are configured. The downlink frequency transmission unit 200 and the uplink frequency reception unit 300 are connected to the transmission / reception shared antenna 500 via the antenna duplexer 400, and operate as a frequency division duplex (FDD) radio transmission / reception unit during normal operation. In the peripheral monitoring mode, in order to monitor the downstream frequency band, the downstream frequency receiving unit 700 is operated without operating the downstream frequency transmitting unit 200, and the reception field strength level of each frequency channel in the downstream frequency band is detected by the receiving antenna 600. To work.
[0007]
[Problems to be solved by the invention]
In the case of a wireless communication system in which the transmission frequency and the reception frequency of the wireless base station device are different, such as the frequency division duplex method (FDD), in the wireless base station device according to the conventional example and the wireless system using the same as described above. Originally, the radio base station apparatus has a problem that it does not have a function of receiving the same frequency as the transmission frequency (downlink frequency). Further, in the conventional example as described above, there is a problem that an antenna failure cannot be detected due to a method of inputting a part of the output of the transmission unit to the reception unit. Further, in the conventional example as described above, there is a problem in that a fault location occurring inside the radio base station cannot be specified. Further, in the conventional example as described above, in order to add the periphery monitoring function, it is necessary to separately provide a downlink frequency receiving unit and a receiving antenna, and there is a problem in that the size of the device is increased and the cost is increased. Further, in the conventional example as described above, there is a problem in that it is necessary to separately provide a demodulating unit in order to add a failure detection mode function, resulting in an increase in the size and cost of the device. Further, in the frequency division duplex (FDD) wireless communication system according to the conventional example as described above, each wireless base station device generally has an asynchronous configuration, and a plurality of wireless base station devices are used in the system configuration. It was difficult to identify the failure site.
[0008]
In the present invention, the above problems are solved, the fault detection function and the surrounding monitoring function are realized with a simple configuration to which one downlink frequency receiver is added, and the fault location can be identified with high accuracy. An object of the present invention is to provide an excellent radio base station apparatus capable of performing high-speed and high-accuracy peripheral monitoring and a radio system using the same.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, in the present invention, a downlink frequency transmission unit, a first uplink frequency reception unit, and a transmission / reception shared antenna are connected by a first antenna sharing unit, and a second uplink frequency reception unit and a downlink antenna are connected. The frequency receiving unit and the receiving antenna are connected by the second antenna sharing means. In addition, a single demodulator is configured to include a circuit that generates an optimal demodulation timing signal for each of the normal operation and the failure detection mode.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
  The invention according to claim 1 of the present invention is a base station apparatus of a frequency division duplex (FDD) wireless communication system, wherein a transmission / reception shared antenna, a downlink frequency transmitter, a first uplink frequency receiver, A first antenna sharing means for sharing the transmission / reception shared antenna in a downlink frequency transmitting unit and the first uplink frequency receiving unit, and a receiving antenna;A downlink frequency receiving unit having a first low-noise amplifier that down-converts a downlink frequency band to an intermediate frequency, a first frequency converter, and a first local oscillator; and a first low-frequency converter that down-converts an uplink frequency band to an intermediate frequency. Any one of a second upstream frequency receiving unit having two low noise amplifiers, a second frequency converting unit, and a second local oscillating unit, and an intermediate frequency signal output from the first and second frequency converting units. A high frequency signal switching means for selecting and inputting to the intermediate frequency signal processing unit, a baseband signal processing unit for extracting a baseband signal from the intermediate frequency signal output from the intermediate frequency signal processing unit,A second antenna sharing means for sharing the reception antenna between the second uplink frequency reception unit and the downlink station wave number reception unit, and the downlink frequency reception unit and the reception antenna during a non-operation period And performing reception monitoring while sweeping the downlink frequency band, and transmitting waves from the downlink frequency transmission unit transmitted from the transmission / reception shared antenna of the base station apparatus with the reception antenna of the same base station A radio base station apparatus that detects a failure of the base station apparatus by receiving by the downlink frequency receiving unit, wherein the downlink frequency receiver includes a failure detection function and a peripheral monitoring function. Can be realized with a simple configuration addedIn addition, the intermediate frequency signal processing section and later can be shared for upstream frequency reception and downstream frequency receptionIt has the action.
[0011]
  According to a second aspect of the present invention, means for sharing the receiving antenna between the second upstream frequency receiving unit and the downstream frequency receiving unit.Is a band-pass filter whose pass band is an upstream frequency band, and in normal operation, the reception antenna and the second upstream frequency receiving unit are connected via the band-pass filter, and the failure detection mode is used for the reception. High frequency signal switching means for connecting an antenna and the downlink frequency receiving unit is provided.The radio base station apparatus according to claim 1 is characterized in that the fault detection function and the peripheral monitoring function can be realized with a simple configuration to which one downlink frequency receiver is added.
[0014]
  Claims of the invention3The invention described inA directional coupler that extracts a part of the output of the downlink frequency transmitter, and a high frequency that is selected from the distributed output of the directional coupler and a received signal from the reception antenna and input to the downlink frequency receiver Provide signal switching meansClaim 1Or 2The wireless base station device described above is realized with a simple configuration with a single downlink frequency receiver added to the failure detection function and the periphery monitoring function, and whether the failure point is a shared transmission / reception antenna or a reception antenna. It has the effect | action that can be specified.
[0017]
  Claims of the invention4The invention described inTransmission output level control means for setting the transmission output level of the downlink frequency transmission unit to be smaller than that during normal operation, the reception level detected by the downlink frequency reception unit, and the reception level for the intermediate frequency signal processing unit Threshold setting means for comparing with a value and comparison meansClaim 1Or2. The radio base station apparatus according to 2, wherein the fault detection function and the periphery monitoring function are realized with a simple configuration with one downlink frequency receiving unit added, and the fault detection with high accuracy can be performed. Have
[0018]
  Claims of the invention5The invention described inThe downlink frequency receiving unit extracts a part of a first frequency conversion unit output for down-converting a downlink frequency band to an intermediate frequency, detects a level, and outputs the first frequency conversion unit. A narrow band-pass filter that extracts a part of the band and limits the band, and a second level detector that detects the level of the output of the narrow band band-pass filterClaims 1 toAny of 4The radio base station apparatus described above has an effect that it is possible to perform high-speed peripheral monitoring by specifying a failure detection function and a peripheral monitoring function with a simple configuration with a single downstream frequency receiver added. .
[0019]
  Claims of the invention6The invention described inThe baseband signal processing unit includes a signal analysis unit including an A / D converter and a digital signal processing device. In the peripheral monitoring mode, the output signal of the downlink frequency reception unit is input to the signal analysis unit, and the baseband signal processing unit The communication method of jamming signal existing inClaims 1 to 5 characterized in thatEitherThis is a wireless base station device as described above, which realizes a fault detection function and a peripheral monitoring function with a simple configuration with a single downlink frequency receiver added, and can perform high-accuracy peripheral monitoring. Have.
[0020]
  Claims of the invention7According to the present invention, in a frequency division duplex (FDD) wireless communication system and its wireless base station device,The radio base station apparatus shares the transmission / reception shared antenna among the transmission / reception shared antenna, the downlink frequency transmission unit, the first uplink frequency reception unit, the downlink frequency transmission unit, and the first uplink frequency reception unit. Downstream frequency reception comprising: a first antenna sharing means; a receiving antenna; a first low noise amplifier that downconverts a downstream frequency band to an intermediate frequency; a first frequency converter; and a first local oscillator. And a second upstream frequency receiving unit having a second low noise amplifier that down-converts the upstream frequency band to an intermediate frequency, a second frequency converter, and a second local oscillator, and the first and second A high-frequency signal switching unit that selects one of the intermediate frequency signals output from the two frequency conversion units and inputs the intermediate frequency signal to the intermediate frequency signal processing unit; and an intermediate signal output from the intermediate frequency signal processing unit A baseband signal processing unit that extracts a baseband signal from a wave number signal; and second antenna sharing means for sharing the reception antenna by the second uplink frequency receiving unit and the downlink frequency receiving unit. Frequency division duplex system ( FDD ) A radio communication system includes a plurality of radio base station apparatuses, a radio base station control apparatus that centrally controls the plurality of radio base station apparatuses, and a line that connects the plurality of radio base station apparatuses to the radio base station control apparatus Means andIn response to a command from the radio base station control device during a non-operation period, a downlink frequency transmission radio wave emitted from the radio base station device is received by a downlink frequency reception unit of another radio base station device, causing a failure of the radio base station device A radio base station device characterized by specifying a part and a radio system using the same, and realizing a fault detection function and a peripheral monitoring function with a simple configuration with one downlink frequency receiver added. , It has the effect | action that a fault location can be specified with high precision.
[0022]
  Claims of the invention8The invention described inFailure detection result performed by the radio base station apparatus itself after the plurality of radio base station apparatuses connected to the radio base station control apparatus using the line means are synchronized using a synchronization signal on the line And the failure detection result by transmission and reception between the plurality of radio base station devices in the radio base station deviceThe failure part is specified, The claim characterized by the above-mentioned7The radio base station apparatus described above and a radio system using the radio base station apparatus, which realizes a fault detection function and a peripheral monitoring function with a simple configuration with one downlink frequency receiving unit added, and a plurality of radio base station apparatuses Can be identified with higher accuracy.
[0025]
  Claims of the invention9Thru14The invention described in any one of claims 1 to6The invention of the wireless base station described above is applied to the invention of a wireless terminal, and the above claims 1 to6The same effect is obtained by simply replacing the described radio base station with a radio terminal.
[0026]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0027]
(First embodiment)
FIG. 1 shows a basic configuration of a radio base station apparatus according to the first embodiment of the present invention. In FIG. 1, a radio base station apparatus 1 is connected to a transmission / reception shared antenna 5 and a reception antenna 6, and includes a downlink frequency transmission unit 2, a first uplink frequency reception unit 3, and a first antenna duplexer 4. The second antenna duplexer 7, the second uplink frequency receiver 8, and the downlink frequency receiver 9. FIG. 1 also shows a terminal radio 10 and other radio base station apparatus 11.
[0028]
In FIG. 1, a radio base station apparatus 1 is installed outdoors and performs radio communication with a terminal radio 10 using a frequency division duplex (FDD) system. During normal operation, the radio base station apparatus 1 transmits a downlink frequency (for example, 1930 to 1990 MHz) from the downlink frequency transmission unit 2, and at the same time, the first uplink frequency reception unit 3 receives an uplink frequency (for example, 1850 to 1910MHz). To work.
[0029]
The first Andena duplexer 4 shares the transmission / reception shared antenna 5 between the downlink frequency transmission unit 2 and the first uplink frequency reception unit 3, and transmits and receives the transmission signal from the downlink frequency transmission unit 2 with almost no loss. In addition to transmitting to the antenna 5, the signal in the uplink frequency band from the transmission / reception shared antenna 5 is transmitted to the first uplink frequency receiver 3 with almost no loss, and the downlink frequency transmitter 2 and the first uplink frequency receiver 3 Operates to ensure high isolation between.
[0030]
The second upstream frequency receiving unit 8 constitutes a diversity receiver together with the first upstream frequency receiving unit 3, and the second upstream frequency receiving unit 8 is the same as the first upstream frequency receiving unit 3 at the same time. Operates to receive the frequency of.
[0031]
The downstream frequency receiver 9 operates to receive downstream frequencies (1930 to 1990 MHz), and detects a reception input level (electric field strength level, RSSI). The second antenna duplexer 7 shares the reception antenna 6 with the second uplink frequency receiving unit 8 and the downlink frequency receiving unit 9 and operates in the same manner as the first antenna duplexer 4.
[0032]
In FIG. 1, during normal operation, the downlink frequency transmission signal from the downlink frequency transmission unit 2 is transmitted to the terminal radio 10 through the first antenna duplexer 4, the transmission / reception shared antenna 5 and the path 12. The uplink transmission signal from the terminal radio 10 is transmitted to the radio base station apparatus 1 through the path 13 or the path 14, and the path 13 side passes through the transmission / reception shared antenna 5 and the first antenna duplexer 4 to the first uplink. The signal is transmitted to the frequency receiving unit 3, and the path 14 side is transmitted to the second uplink frequency receiving unit 8 through the receiving antenna 6 and the second antenna duplexer 7. With the above operation, frequency division duplex (FDD) wireless communication is performed.
[0033]
In the periphery monitoring mode, the operation of the downlink frequency transmission unit 2 is stopped, the downlink frequency reception unit 9 is operated, and the periphery monitoring is performed by receiving while sweeping the downlink frequency band (1930 to 1990 MHz). . At this time, if there is a downlink frequency transmission wave from another radio base station apparatus 11, the signal is transmitted to the downlink frequency receiving unit 9 via the path 15, the receiving antenna 6 and the second antenna duplexer 7. . With the above operation, other radio waves existing in the downlink frequency band around the radio base station apparatus 1 can be monitored, and the operating frequency is determined based on this information.
[0034]
In the failure detection mode, the downlink frequency transmission signal from the downlink frequency transmission unit 2 passes through the first antenna duplexer 4, the transmission / reception shared antenna 5 and the path 16, and then passes through the reception antenna 6 and the second antenna duplexer 7. Then, it is transmitted to the downlink frequency receiving unit 9. Through the above operation, the transmission signal of the radio base station apparatus 1 is received by the downlink frequency receiving unit provided in the same radio base station apparatus 1 and the level and signal quality are evaluated. A failure can be detected.
[0035]
In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0036]
As described above, according to the first embodiment of the present invention, a single downlink frequency reception unit is provided and a reception antenna for diversity reception is shared. A detection function and a surrounding monitoring function can be realized.
[0037]
(Second Embodiment)
FIG. 2 shows a basic configuration of the radio base station apparatus according to the second embodiment of the present invention. The second antenna duplexer 7 of the radio base station apparatus in FIG. 1 is reduced in size and cost. It is comprised as follows. 2, the same reference numerals as those in FIG. 1 have the same functions, and further include an upstream frequency bandpass filter 17 and a high-frequency signal switching circuit 18.
[0038]
In FIG. 2, the operations other than the upstream frequency bandpass filter 17 and the high frequency signal switching circuit 18 are the same as the operations in FIG. The second antenna duplexer 7 in FIG. 1 is generally composed of a band-pass filter using a large dielectric resonator, and is large and expensive. In the second embodiment of the present invention, the function of the second antenna duplexer 7 is realized by the upstream frequency band-pass filter 17 and the high-frequency signal switching circuit 18, thereby reducing the size and cost of the apparatus. .
[0039]
In FIG. 2, during normal operation, the high-frequency signal switching circuit 18 is controlled so as to connect the receiving antenna 6 and the upstream frequency bandpass filter 17, so that the upstream frequency band signal from the receiving antenna 6 is the first. 2, the leakage component of the transmission signal from the downstream frequency transmitter 2 to the reception antenna 6 is suppressed by the upstream frequency bandpass filter 17 and is transmitted to the second upstream frequency receiver 8. Is not entered.
[0040]
Further, in the peripheral monitoring mode or the failure detection mode, the high frequency signal switching circuit 18 is controlled so as to connect the receiving antenna 6 and the downlink frequency receiving unit 9, so that the signal from the receiving antenna 6 is transmitted to the downlink frequency receiving unit. 9 is input. Here, since the high-frequency signal switching circuit 18 performs the switching operation of only the received signal, it is not necessary to handle a high-power signal, so that it can have a relatively simple configuration (for example, SW configured with GaAsFET). In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0041]
As described above, according to the second embodiment of the present invention, a means for sharing a receiving antenna can be realized by a minimum necessary radio circuit.
[0042]
(Third embodiment)
FIG. 3 shows a basic configuration of a radio base station apparatus according to the third embodiment of the present invention. The second uplink frequency receiving unit 8 and the downlink frequency receiving unit 9 of the radio base station apparatus in FIG. Thus, the intermediate frequency stage and the subsequent parts are shared to reduce the size and cost.
[0043]
3, the same reference numerals as those in FIG. 2 have the same functions, and further include a high-frequency signal switching circuit 22 and an intermediate frequency stage 27. Then, the low noise amplifier 19, the mixer 20, the local oscillator 21 for the upstream frequency receiving unit, the high frequency signal switching circuit 22 and the intermediate frequency stage 27 perform operations corresponding to the second upstream frequency receiving unit 8 in FIGS. The low noise amplifier 23, the downstream frequency bandpass filter 24, the mixer 25, the local oscillator 26 for the downstream frequency receiving unit, the high frequency signal switching circuit 22 and the intermediate frequency stage 27 are the same as the downstream frequency receiving unit 9 in FIGS. The other operations are the same as those shown in FIGS. 1 and 2.
[0044]
In uplink and downlink frequencies in frequency division duplex (FDD), frequencies corresponding to each other are generally assigned at regular intervals, for example, uplink frequencies (1850 to 1910 MHz) and downlink frequencies (1930 to 1990 MHz) It has the same bandwidth (60MHz) with an interval of 80MHz. Therefore, the second uplink frequency receiving unit 8 and the downlink frequency receiving unit 9 in FIGS. 1 and 2 need only have a reception range changed by 80 MHz.
[0045]
In FIG. 3, during normal operation, the high frequency switching circuit 18 is controlled so as to connect the receiving antenna 6 and the upstream frequency bandpass filter 17, so that the upstream frequency band signal from the receiving antenna 6 is low. Amplified by the noise amplifier 19, converted to an intermediate frequency (for example, 250 MHz) by the mixer 20 and the local oscillator 21 for the upstream frequency receiving unit, selected by the high frequency signal switching circuit 22, and input to the intermediate frequency stage 27. In the intermediate frequency stage, narrow band limitation or amplification is performed, and processing such as reception input level (field strength level, RSSI) detection and demodulation is performed.
[0046]
Further, in the peripheral monitoring mode or the failure conversion mode, the high frequency switching circuit 18 is controlled so as to connect the receiving antenna 6 and the low noise amplifier 23, so that the signal from the receiving antenna 6 is transmitted by the low noise amplifier 23. Amplified, band-limited (mainly image interference wave removal) by the downstream frequency bandpass filter 24, converted to an intermediate frequency (for example, 250 MHz) by the mixer 25 and the local oscillation unit 26 for downstream frequency reception unit, a high frequency signal switching circuit 22 is selected and input to the intermediate frequency stage 27. Here, if the oscillation frequency of the local oscillation unit 21 for the uplink frequency reception unit is set to (1600 to 1660 MHz), for example, and the oscillation frequency of the local oscillation unit 26 for the downlink frequency reception unit is set to (1680 to 1740 MHz), the intermediate frequency is Can be unified to 250MHz. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0047]
As described above, according to the third embodiment of the present invention, the fault detection function and the peripheral monitoring can be performed by the minimum necessary radio circuit by sharing the intermediate frequency stage and thereafter of the downlink frequency receiver and the uplink frequency receiver. Function can be realized.
[0048]
(Fourth embodiment)
FIG. 4 shows a basic configuration of a radio base station apparatus according to the fourth embodiment of the present invention. In the radio base station apparatus of FIGS. 1 and 2, a part of the output of the downlink frequency transmission unit 2 is shown. Is extracted and input to the downlink frequency receiving unit.
[0049]
4, the same reference numerals as those in FIGS. 1 and 2 have the same function, and further include a high-frequency signal switching circuit 28, an attenuator 29, and a high-frequency signal switching circuit 30. In FIG. 4, operations other than the high-frequency signal switching circuit 28, the attenuator 29, and the high-frequency signal switching circuit 30 are the same as those in FIGS.
[0050]
In FIG. 4, when performing fault detection without using an antenna in the fault detection mode, the high-frequency signal switching circuit 28 and the high-frequency signal switching circuit 30 are switched to the attenuator 29 side, and the transmission output of the downlink frequency transmission unit 2 is After being attenuated by the attenuator 29 that is equivalent to the transmission loss (generally about 3 OdB) between the transmission / reception shared antenna 5 and the receiving antenna 6, it is input to the downstream frequency receiver 9.
[0051]
When performing fault detection via the antenna in the fault detection mode, the high frequency signal switching circuit 28 is switched to the first antenna duplexer 4 side, and the high frequency signal switching circuit 30 is switched to the high frequency signal switching circuit 18 side. The transmission output of the downlink frequency transmission unit 2 is input to the downlink frequency reception unit 9 via the shared transmission / reception antenna 5 and the reception antenna 6. Here, if the failure is detected without using the antenna and the failure is not confirmed, then if the failure is detected through the antenna and the failure is confirmed, there is a failure in the antenna (or cable or antenna duplexer). Can be confirmed. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0052]
As described above, according to the fourth embodiment of the present invention, the failure of the antenna unit can be specified.
[0053]
(Fifth embodiment)
FIG. 5 shows the basic rules of the radio base station apparatus according to the fifth embodiment of the present invention. In the radio base station apparatus of FIG. 4, a part of the output of the downlink frequency transmission unit 2 is extracted. A directional coupler is used as a means.
[0054]
5, components having the same reference numerals as those in FIG. 4 have the same functions. In FIG. 5, operations other than the directional coupler 31 are the same as those in FIG. In FIG. 4, since the high-frequency signal switching circuit 28 handles transmission signals (high power signals), it generally has a relatively complicated configuration, resulting in a large circuit and high cost. Further, as a means for extracting the output of the downlink frequency transmission unit 2, it is necessary to provide attenuation corresponding to the transmission loss between antennas, so that the degree of coupling can be lowered (the level to be extracted may be low).
[0055]
In FIG. 5, the directional coupler 31 generally transmits the output of the downstream frequency transmission unit 2 to the first antenna duplexer 4 with almost no loss (about 0.3 d) and a part of the output of the downstream frequency transmission unit 2. Is generally taken out with an attenuation of 2 OdB (degree of coupling), input to the attenuator 29, and input to the downstream frequency receiving unit 9 via the high frequency signal switching circuit 30. Here, the attenuation amount of the attenuator 29 is set to a value (10 dB) obtained by subtracting the coupling degree (20 dB) of the directional coupler 31 from the inter-antenna transmission loss (30 dB). In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0056]
As described above, according to the fifth embodiment of the present invention, the function of identifying the failure of the antenna unit can be realized by the minimum necessary radio circuit.
[0057]
(Sixth embodiment)
FIG. 6 shows a basic configuration of a radio base station apparatus according to the sixth embodiment of the present invention. In the radio base station apparatus of FIGS. 1 to 3, the output of the downlink frequency receiving unit 9 is demodulated. In this configuration, the modulation signal from the downlink frequency transmission unit 2 is demodulated and a failure is detected according to the degree of communication quality. 6, components having the same reference numerals as those in FIGS. 1 to 3 have the same functions, and operations other than the demodulator 32, the modulator 33, and the signal processing unit 34 are the same as those in FIGS. .
[0058]
In FIG. 6, the baseband signals from the first uplink frequency receiver 3, the second uplink frequency receiver 8, and the downlink frequency receiver 9 are demodulated by the demodulator 32 and input to the signal processor 34. Further, the modulator 33 modulates the downlink frequency transmission unit 2 with the modulation signal from the signal processing unit 34. In the failure detection mode, the modulation signal from the signal processing unit 34 is demodulated by the demodulator 32 from the downlink frequency transmission unit 2 through the downlink frequency reception unit 9, and the signal processing unit 34 compares the modulation signal with the modulation signal. (Bit error rate) is detected. By determining the degree of the communication quality, the operation is performed so as to detect the failure with higher accuracy than in the case where the determination is made only by detecting the received signal level. Here, the demodulator 32 is already prepared for demodulating the signal from the upstream frequency receiver during normal operation. In this embodiment, a new circuit is added by sharing the demodulator 32. There is no need to do. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0059]
As described above, according to the sixth embodiment of the present invention, it is possible to perform fault detection with high accuracy with the minimum necessary configuration.
[0060]
(Seventh embodiment)
FIG. 7 shows a basic configuration of a radio base station apparatus according to the seventh embodiment of the present invention. In FIG. 7, components having the same reference numerals as those in FIG. A base station control device 60, a modulation unit 61, a reception signal switching unit 62, a demodulation unit 63, a timing generation unit 64, a control unit 65, and a message detection unit 66 are provided.
[0061]
In FIG. 7, the message sent from the base station control device 60 is received by the message detection unit 66 via the control unit 65. The message detection unit 66 detects the normal operation mode or the failure detection mode, and notifies the timing generation unit 64 according to each message. The timing generation unit 64 controls the reception signal switching unit 62 based on the instruction to select the output signals from the second uplink frequency receiving unit 8 and the downlink frequency reception unit 9 and output them to the demodulation unit 63. Operate.
[0062]
Further, the timing generation unit 64 notifies the demodulation unit 63 of the optimum demodulation reference timing, so that the demodulation unit 63 can recognize and demodulate the time position of the reception time unit (slot). Downlink data is modulated by the modulator 61 and transmitted via the downlink frequency transmitter 2.
[0063]
In general, in a frequency division duplex (FDD) wireless communication system, the transmission time unit of the downlink data (lower reslot) and the transmission time unit of the upper data (upper slot) are not matched in time. The wireless circuit is designed to be simplified so that the terminal wireless devices do not need to transmit and receive at the same time.
[0064]
Therefore, during normal operation, the timing of the slot for transmitting downlink data and the timing of the signal received by the downlink frequency receiver 9 do not coincide with each other in time. For this reason, the timing generator 64 notifies the demodulator 63 of the timing suitable for normal operation (timing that takes into account the time offset between uplink and downlink on the system and the radio wave propagation time between radios) to the normal demodulator 63. It works to do.
[0065]
On the other hand, in the failure detection mode, the downlink data is modulated by the modulation unit 61 and transmitted via the downlink frequency transmission unit 2, received by the downlink frequency reception unit 9 via an antenna or a radio circuit, and selected by the switching unit 62. And input to the demodulator 63. Therefore, the timing of the slot for transmitting the downlink data and the timing of the signal received by the downlink frequency receiving unit 9 substantially coincide with each other in time. Therefore, the timing generation unit 64 can notify the demodulation unit 63 of timing suitable for the failure detection mode (substantially the same as the timing of the slot for transmitting downlink data) and demodulate the radio wave emitted by itself. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0066]
As described above, according to the seventh embodiment of the present invention, the failure detection function can be realized by providing the timing generation unit that controls the optimum demodulation reference timing and by using the minimum necessary demodulation unit.
[0067]
(Eighth embodiment)
FIG. 8 shows the basic rules of the radio base station apparatus according to the eighth embodiment of the present invention. In the radio base station apparatus of FIGS. 1 to 3, the transmission output power of the downlink frequency transmission unit 2 is shown. Is detected and the failure detection is performed by comparing the received signal level (RSSI) of the downlink frequency receiving unit 9 with a threshold value.
[0068]
8, the same reference numerals as those in FIGS. 1 to 3 have the same functions and perform the same operations as those in FIGS. On the other hand, the downstream frequency transmission unit 2 includes a transmission pre-stage unit 35, a variable gain amplifier 36, and a power amplification stage 37, and further includes a comparator 40 that compares a reception level detection signal (RSSI) 38 and a threshold voltage 39. ing.
[0069]
In FIG. 8, the transmission output of the pre-transmission stage 35 is amplified by the variable gain amplifier 36 and further amplified by the power amplification stage 37. Here, during normal operation, the variable gain amplifier 36 is set to a substantially maximum gain, and the output of the downlink frequency transmission unit 2 is the maximum output. In the fault detection mode, the gain of the variable gain amplifier 36 is generally set to be 30 dB lower than the maximum gain, and the output of the downstream frequency transmission unit 2 also has an output power that is 30 dB lower than the maximum output.
[0070]
The reception level detection signal (RSSI) 38 output from the downlink frequency receiving unit 9 is a voltage that is inferior to the logarithm of the reception signal level input to the downlink frequency receiving unit 9, and generally the reception signal level is −100. It exhibits linear characteristics within the range of -40dBm. When the output of the downlink frequency transmission unit 2 is the maximum power, generally, the reception signal level input to the downlink frequency reception unit 9 via the antenna exceeds −40 dBm, so the reception level detection signal (RSSI) 38 is the highest. Since it is saturated with a voltage (generally about 3V), the presence or absence of a received signal can be detected, but a minute level fluctuation cannot be detected.
[0071]
In the present embodiment, in the failure detection mode, by setting the output of the downlink frequency transmission unit 2 to output power that is 30 dB lower than the maximum output, the received signal level input to the downlink frequency reception unit 9 is − It can be suppressed to 40 dBm or less, and minute fluctuations in the reception level can be detected when a failure is detected. Here, the threshold voltage 39 is set in advance to be a certain value lower than the reception level in the failure detection mode in the normal operation state, and the reception level detection signal (RSSI) 38 falls below the threshold value in the comparator 40. It works to detect the occurrence of a failure when Also, the degree of failure can be detected by providing the threshold value in several stages. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0072]
As described above, according to the eighth embodiment of the present invention, highly accurate fault detection can be performed.
[0073]
(Ninth embodiment)
FIG. 9 shows a basic configuration of a radio base station apparatus according to the ninth embodiment of the present invention. In the radio base station apparatus of FIG. In addition, two types of detection means, namely broadband detection, are provided to realize a high-speed peripheral monitoring function.
[0074]
9, the same reference numerals as those in FIG. 3 have the same functions and perform the same operations as those in FIG. Further, in FIG. 9, an intermediate frequency narrow band filter 41, a narrow band reception level detection signal (RSSI1) 42, and a distributor 43 are provided.
[0075]
In FIG. 9, during normal operation, the intermediate frequency signal output from the upstream frequency receiving unit (17 to 21) is selected by the high frequency signal switching circuit 22, and the intermediate frequency narrow band filter 41 (generally composed of a SAW filter). Therefore, the band is limited to one channel band (for example, 300 KHz), input to the intermediate frequency stage 27, the reception level is detected, and the narrow band reception level detection signal (RSSI1) 42 is output.
[0076]
Further, in the peripheral monitoring mode, the intermediate frequency signal output from the downstream frequency receiving unit (23 to 26) is distributed by the distributor 43 to the high frequency signal switching circuit 22 side and the wideband reception level detecting unit 44 side. The intermediate frequency signal distributed to the high-frequency signal switching circuit 22 side is input to the intermediate frequency stage 27 via the intermediate frequency narrowband filter 41 and the reception level is detected and the narrowband reception level detection signal (as in normal operation) ( RSSI1) 42 is output. On the other hand, the intermediate frequency signal distributed to the wideband reception level detection unit 44 side is detected for the reception level over a wide band (for example, 60 MHz in the bandwidth of the downstream frequency bandpass filter 24), and a wideband reception level detection signal (RSSI2) 45 is output. The
[0077]
With the above configuration, in the peripheral monitoring mode, the narrowband reception level detection signal (RSSI1) 42 of 1 channel band (300KHz) and the wideband reception level detection signal (RSSI2) 45 of wide band (60MHz) should be observed simultaneously. Can do.
[0078]
Here, at the start of the peripheral monitoring mode, first, the wideband reception level detection signal (RSSI2) 45 is observed, and if it can be confirmed that there is no jamming signal over the entire downstream frequency band (60 MHz), the narrowband reception level There is no need to detect the reception level while changing the reception frequency for all frequency channels (for example, 200 channels) by the detection signal (RSSI1).
[0079]
If the wideband reception level detector 44 has a certain bandwidth (for example, 6 MHz), the entire downstream frequency band (60 MHz) is reduced to several bands (for example, 10 bands) at the start of the peripheral monitoring mode. The wideband reception level detection signal (RSSI2) 45 is observed for each band, and then all the frequency channels in the band are detected by the narrowband reception level detection signal (RSSI1) 42 only for the band in which the jamming wave exists. The reception level is detected while changing the reception frequency (for example, 20 channels). In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0080]
As described above, according to the ninth embodiment of the present invention, high-speed peripheral monitoring can be performed with the minimum necessary configuration.
[0081]
(Tenth embodiment)
FIG. 10 shows a basic configuration of the radio base station apparatus according to the tenth embodiment of the present invention. In the radio base station apparatus of FIG. 6, signal analysis for analyzing the output signal of the downlink frequency receiving unit 9 is shown. Is provided to identify the jamming system in the peripheral monitoring mode.
[0082]
10, the same reference numerals as those in FIG. 6 have the same functions, perform the same operation as in FIG. 6, and include a signal analysis unit 46. In FIG. 10, the baseband signal output of the downstream frequency receiving unit 9 is input to the signal analyzing unit 46 in the periphery monitoring mode. The signal analysis unit 46 is generally composed of an A / D converter and a digital signal processing device (DSP), digitally analyzes the baseband signal, and analyzes the signal bandwidth and modulation method.
[0083]
In general, the communication method (system) of interfering radio waves existing in the downlink frequency band is unspecified, and cannot be demodulated by the demodulation unit 32 unless the communication method is the same as that of the radio base station. According to the present embodiment, it is possible to realize the periphery monitoring with higher accuracy by analyzing the received signal of the downlink frequency receiving unit 9 and determining the communication method. In addition, although the embodiment in the radio base station has been described above, it goes without saying that the embodiment can be similarly implemented even if it is applied to a radio terminal.
[0084]
As described above, according to the tenth embodiment of the present invention, high-accuracy peripheral monitoring can be performed.
[0085]
(Eleventh embodiment)
FIG. 11 shows a basic configuration of a radio base station apparatus and a radio system using the same in the eleventh embodiment of the present invention, and is a system configuration diagram in which a plurality of radio base station apparatuses in FIG. 1 are arranged. Is shown. In FIG. 11, the same reference numerals as those in FIG. 1 have the same functions, and the radio base station apparatus 47 has the same functions as the radio base station apparatus 1. In FIG. 11, in the failure detection mode, each of the radio base station devices 1 and 47 receives a command from the base station control device 60 via the line means 58 and 59, and the radio channel with the terminal device 10 (see FIG. 1). Is released.
[0086]
Further, in accordance with a command from the base station control device 6O, a transmission signal is transmitted from the downlink frequency transmission unit 2 of the radio base station device 1 via the transmission / reception shared antenna 5, and is received by the radio base station device 47 via the path 71. The signal is received by the downlink frequency receiving unit 55 via the antenna 52. At this time, the control unit 57 of the radio base station apparatus 47 compares the transmission signal transmitted by the radio base station apparatus 1 with the signal received by the downlink frequency receiving unit 55 of the radio base station apparatus 47, and evaluates the communication quality. To work. Similarly, in accordance with a command from the base station control device 60, a transmission signal is transmitted from the downlink frequency transmission unit 48 of the radio base station device 47 via the shared transmission / reception antenna 51, and via the path 72, the radio base station device 1 Is received by the downlink frequency receiving unit 9 via the receiving antenna 6.
[0087]
At this time, the control unit 56 of the radio base station apparatus 1 compares the transmission signal transmitted from the radio base station apparatus 47 with the signal received by the downlink frequency reception unit 9 of the radio base station apparatus 1 to evaluate the communication quality. To work. Here, it is confirmed that the radio base station apparatus 47 has completed the fault detection in the radio base station apparatus alone and has no fault by the methods of the first to eighth embodiments shown in FIGS. 1 to 8. Thus, for example, when the radio base station apparatus 47 cannot receive a transmission wave from the radio base station apparatus 1 (or communication quality is poor), the downlink frequency transmission unit 2 or the transmission / reception shared antenna 5 of the radio base station apparatus 1 It can be determined that there is a failure (failure). On the contrary, when the radio base station apparatus 1 cannot receive a transmission wave from the radio base station apparatus 47 (or communication quality is poor), the downlink frequency receiving unit 9 or the receiving antenna 6 of the radio base station apparatus 1 It can be determined that there is a failure (failure).
[0088]
As described above, according to the first embodiment of the present invention, it is possible to identify a fault location with high accuracy.
[0089]
(Twelfth embodiment)
FIG. 12 shows a basic configuration of a radio base station apparatus and a radio system using them in the twelfth embodiment of the present invention. In FIG. 12, the same reference numerals as those in FIGS. Have the same function, and in addition, a synchronization signal detector 67 and other radio base station devices 68 and 69 are provided. In the radio base station device 1 of FIG. 12, the synchronization signal sent from the radio base station control device 60 is received by the synchronization signal detection unit 67 via the control unit 65. The synchronization signal detection unit 67 controls the timing generation unit 64 so as to depend on the received synchronization signal. Based on the instruction, the timing generation unit 64 outputs an optimal demodulation reference timing signal to the demodulation unit 63, so that the demodulation unit 63 can recognize and demodulate the time position of the reception time unit (slot). Become. The other radio base station devices 68 and 69 also have the same configuration as the radio base station device 1 and perform the same operation as described above. Accordingly, the plurality of radio base station apparatuses 1, 68 and 69 connected to the radio base station control device 60 are all synchronized with each other, and the radio waves emitted by the radio base station apparatus 1 are transmitted to other radio base station apparatuses 68. And 69 can be received and demodulated correctly. For example, when radio waves emitted by the radio base station apparatus 1 are received by the two radio base station apparatuses 68 and 69 and one of the demodulated data is normal and the other is abnormal, the radio base station apparatus that is abnormal It is possible to specify that there is some abnormality in the receiving system. Therefore, if failure detection is executed by at least three radio base station apparatuses, it becomes possible to identify the failure site.
[0090]
As described above, according to the twelfth embodiment of the present invention, it is possible to specify a fault location with high accuracy.
[0091]
(Thirteenth embodiment)
FIG. 13 shows the basic configuration of a radio base station apparatus and a radio system using them in the thirteenth embodiment of the present invention. In FIG. 13, the same reference numerals as in FIGS. Have the same function. In FIG. 13, the radio base station apparatus has the same functions as those of the seventh and twelfth embodiments described above, and specifies a failure site by combining these functions. Hereinafter, the operation will be described with reference to FIG.
[0092]
First, the radio base station apparatus 1 performs its own fault detection in the fault detection mode. At this time, the timing generator 64 notifies the demodulator 63 of the optimum timing when receiving its own transmission signal. When a failure is detected by the above operation, the radio base station apparatus 1 receives radio waves emitted by another synchronized radio base station apparatus 68 connected to the same radio base station control apparatus 60 and confirms whether the received data is normal. To do.
[0093]
At this time, the timing generation unit 64 notifies the demodulation unit 63 of the optimum timing when receiving a transmission signal from another radio base station device 68. If the result of the above operation is normal, it can be determined that there is a failure in the transmission system of the radio base station apparatus 1. Similarly, after each failure detection in each radio base station device, the failure detection is performed by changing the combination of transmission and reception, so that the location of the failure that has occurred can be transmitted or received by each radio base station device. It can be specified in the system.
[0094]
Therefore, if failure detection is executed by at least two radio base station apparatuses, the failure site can be specified.
[0095]
As described above, according to the thirteenth embodiment of the present invention, it is possible to identify a fault location with higher accuracy.
[0096]
(Fourteenth embodiment)
FIG. 14 shows a basic configuration of a radio base station apparatus and a radio system using them in the fourteenth embodiment of the present invention. In FIG. 14, the same reference numerals as those in FIGS. Have the same function and further include a synchronization word detection unit 70. In FIG. 14, the radio base station devices 68 and 69 have the same configuration as the radio base station device 1, and the internal components are represented by the reference numerals of the radio base station device 1. The radio base station control device 60 transmits a master or slave message to each radio base station device. The slave radio base station apparatus (for example, 68 and 69) outputs the signal received by the downlink radio frequency reception unit to the radio wave emitted by the master radio base station (for example, 1) to the demodulation unit 63, and detects the synchronization word of the downlink signal. The timing is detected by the unit 70 and the timing generation unit 64 is controlled. The timing generator 64 outputs an optimal demodulation reference timing signal to the demodulator 63 based on the instruction, so that the demodulator 63 can recognize and demodulate the time position of the reception time unit (slot). . At this time, the slave radio base station devices (for example, 68 and 69) are synchronized with the master radio base station device (for example, 1). For example, if radio waves emitted by a master radio base station device (eg 1) are received by two radio base station devices (eg 68 and 69) and one of the demodulated data is normal and the other is abnormal, It is possible to specify that there is a failure in the reception system of the radio base station apparatus. Therefore, if failure detection is executed by at least three radio base station apparatuses, the failure part can be specified.
[0097]
As described above, according to the fourteenth embodiment of the present invention, it is possible to specify a fault location with high accuracy.
[0098]
(Fifteenth embodiment)
FIG. 15 shows a basic configuration of a radio base station apparatus and a radio system using them in the fifteenth embodiment of the present invention. In FIG. 15, the same reference numerals as those in FIGS. Have the same function. In FIG. 15, the radio base station apparatus has the functions of the seventh and fourth embodiments, and specifies a failure site by combining these functions.
[0099]
Hereinafter, the operation will be described with reference to FIG. First, the radio base station apparatus 1 performs its own fault detection in the fault detection mode. At this time, the timing generator 64 notifies the demodulator 63 of the optimum timing when receiving its own transmission signal. When a failure is detected by the above operation, the radio base station apparatus 1 (slave) receives radio waves emitted by the radio base station apparatus 68 (master) and confirms whether the received data is normal. At this time, the timing generation unit 64 notifies the demodulation unit 63 of the optimal timing synchronized with the transmission signal from the radio base station device 68. If the result of the above operation is normal, it can be determined that there is a failure in the transmission system of the radio base station apparatus 1.
[0100]
Similarly, after each failure detection in each radio base station device, the failure detection is performed by changing the combination of the master and slave, so that the location of the failure that has occurred can be transmitted or received by each radio base station device. It can be specified in the system.
[0101]
As described above, according to the fifteenth embodiment of the present invention, it is possible to identify a fault location with higher accuracy.
[0102]
【The invention's effect】
As described above, the present invention realizes a fault detection function and a peripheral monitoring function with a simple configuration by adding a single downlink frequency receiving unit and a circuit for generating an optimal demodulation timing signal, and a fault location with high accuracy. In addition, it is possible to provide an excellent radio base station apparatus that can be specified by the above-described method and that can perform high-speed and high-accuracy peripheral monitoring and a radio system using the same.
[Brief description of the drawings]
FIG. 1 is a diagram showing a basic configuration of a radio base station apparatus according to a first embodiment of the invention;
FIG. 2 is a diagram showing a basic configuration of a radio base station apparatus according to the second embodiment of the present invention;
FIG. 3 is a diagram showing a basic configuration of a radio base station apparatus according to a third embodiment of the present invention;
FIG. 4 is a diagram showing a basic configuration of a radio base station apparatus according to a fourth embodiment of the present invention;
FIG. 5 is a diagram showing a basic configuration of a radio base station apparatus according to a fifth embodiment of the present invention;
FIG. 6 is a diagram showing a basic configuration of a radio base station apparatus according to a sixth embodiment of the present invention;
FIG. 7 is a diagram showing a basic configuration of a radio base station apparatus according to a seventh embodiment of the present invention;
FIG. 8 is a diagram showing a basic configuration of a radio base station apparatus according to an eighth embodiment of the present invention;
FIG. 9 is a diagram showing a basic configuration of a radio base station apparatus according to the ninth embodiment of the present invention;
FIG. 10 is a diagram showing a basic configuration of a radio base station apparatus according to the tenth embodiment of the present invention;
FIG. 11 is a diagram showing a basic configuration of a radio base station apparatus according to an eleventh embodiment of the present invention;
FIG. 12 is a diagram showing a basic configuration of a radio base station apparatus according to a twelfth embodiment of the present invention;
FIG. 13 is a diagram showing a basic configuration of a radio base station apparatus according to a thirteenth embodiment of the present invention;
FIG. 14 is a diagram showing a basic configuration of a radio base station apparatus according to a fourteenth embodiment of the present invention;
FIG. 15 is a diagram showing a basic configuration of a radio base station apparatus according to a fifteenth embodiment of the present invention;
FIG. 16 is a diagram illustrating a basic configuration of a radio base station apparatus in a conventional example.
[Explanation of symbols]
1, 47, 100 Radio base station equipment
2, 48, 200 Downlink frequency transmitter
3, 49 First uplink frequency receiver
4, 50 1st antenna duplexer
5, 51, 500 Transmit / receive antenna
6, 52, 600 Receiving antenna
7, 53 Second antenna duplexer
8, 54 Second uplink frequency receiver
9, 55, 700 Downlink frequency receiver
10 Terminal radio
11, 68, 69 Other radio base station equipment
17 Up-band filter
18, 22, 28, 30 High-frequency switching circuit
19, 23 Low noise amplifier
20, 25 mixer
21 Uplink frequency receiver Local oscillator
24 Downlink frequency bandpass filter
26 Downstream frequency receiver Local oscillator
27 Intermediate frequency stage
29 Attenuator
31 Directional coupler
32 Demodulator
33 Modulator
34 Signal processor
35 Pre-transmission part
36 Variable Gain Amplifier
37 Power amplification stage
38 Reception level detection signal
39 Threshold voltage
40 comparator
41 Medium frequency narrowband filter
42 Narrow band reception level detection signal
43 Distributor
44 Wideband reception level detector
45 Wideband reception level detection signal
46 Signal analysis section
56, 57, 65 Control unit
58, 59 Line means
60 Radio base station controller
61 Modulator
62 Receive signal selector
63 Demodulator
64 Timing generator
66 Message detector
67 Sync signal detector
70 Sync word detector
300 Uplink frequency receiver
400 Antenna duplexer

Claims (14)

In a radio base station apparatus of a frequency division duplex (FDD) radio communication system, a transmission / reception shared antenna, a downlink frequency transmitter, a first uplink frequency receiver, the downlink frequency transmitter, and the first uplink frequency A first antenna sharing means for sharing the transmission / reception shared antenna with a receiver; a receiving antenna; a first low-noise amplifier that down-converts a downstream frequency band to an intermediate frequency; and a first frequency converter; A second frequency receiving section having a first local oscillating section, a second low noise amplifier that down-converts the upstream frequency band to an intermediate frequency, a second frequency converting section, and a second local oscillating section. High frequency signal switching for selecting one of the intermediate frequency signals output from the upstream frequency receiving unit and the first and second frequency converting units and inputting the selected intermediate frequency signal to the intermediate frequency signal processing unit Stage and the intermediate frequency signal processing and base band signal processor for extracting a baseband signal from an intermediate frequency signal output from the unit, the second of the receiving antenna at an uplink frequency receiving unit and the down frequency receiver And a second antenna sharing means for sharing the signal, and during the non-operation period, the downlink frequency reception unit and the reception antenna perform reception while sweeping the downlink frequency band, and perform the peripheral monitoring and the transmission / reception shared antenna A radio base station apparatus that detects a failure of a radio base station apparatus by receiving a transmission wave transmitted from the downlink frequency transmission section from the reception antenna and the downlink frequency reception section. The means for sharing the receiving antenna between the second upstream frequency receiving unit and the downstream frequency receiving unit includes a bandpass filter whose pass band is an upstream frequency band, and the receiving antenna and the second during normal operation. 2. The high frequency signal switching means for connecting the upstream frequency receiving unit of the receiver via the band pass filter and connecting the receiving antenna and the downstream frequency receiving unit in the failure detection mode . Wireless base station device. A directional coupler that extracts a part of the output of the downlink frequency transmitter, and a high frequency that is selected from the distributed output of the directional coupler and a received signal from the reception antenna and input to the downlink frequency receiver The radio base station apparatus according to claim 1, further comprising a signal switching unit . Transmission output level control means for setting the transmission output level of the downlink frequency transmission unit to be smaller than that during normal operation, the reception level detected by the downlink frequency reception unit, and the reception level for the intermediate frequency signal processing unit the radio base station apparatus according to claim 1, wherein further comprising a threshold value setting means and comparing means for comparing the value. The downlink frequency receiving unit extracts a part of a first frequency conversion unit output for down-converting a downlink frequency band to an intermediate frequency, detects a level, and outputs the first frequency conversion unit. a narrow band pass filter for band-limiting removed part of, according to any one of claims 1 to 4, characterized in that it comprises a second level detector for outputting a level detection of the narrow band-pass filter Wireless base station equipment. The baseband signal processing unit includes a signal analysis unit including an A / D converter and a digital signal processing device. In the peripheral monitoring mode, the output signal of the downlink frequency reception unit is input to the signal analysis unit, and the baseband signal processing unit the radio base station apparatus according to any one of claims 1 to 5, characterized in that determining the communication method of the interference wave signal present. In a frequency division duplex ( FDD ) radio communication system and its radio base station apparatus,
The radio base station apparatus shares the transmission / reception shared antenna among the transmission / reception shared antenna, the downlink frequency transmission unit, the first uplink frequency reception unit, the downlink frequency transmission unit, and the first uplink frequency reception unit. Downstream frequency reception comprising: a first antenna sharing means; a receiving antenna; a first low noise amplifier that downconverts a downstream frequency band to an intermediate frequency; a first frequency converter; and a first local oscillator. And a second upstream frequency receiving unit having a second low noise amplifier that down-converts the upstream frequency band to an intermediate frequency, a second frequency converter, and a second local oscillator, and the first and second A high-frequency signal switching unit that selects one of the intermediate frequency signals output from the two frequency conversion units and inputs the intermediate frequency signal to the intermediate frequency signal processing unit; and an intermediate signal output from the intermediate frequency signal processing unit Comprising a baseband signal processing section of the wavenumber signal to extract a baseband signal, and a second antenna sharing means for sharing the receiving antenna in the said downlink frequency receiver unit and the second uplink frequency receiver unit ,
A frequency division duplex ( FDD ) radio communication system includes a plurality of the radio base station apparatuses, a radio base station control apparatus that centrally controls the plurality of radio base station apparatuses, and the plurality of radio base station apparatuses Line means connected to the base station controller, and in response to a command from the radio base station controller during a non-operation period, the downlink frequency transmission radio wave emitted from the radio base station apparatus is transmitted to other radio base station apparatuses. A radio base station apparatus that is received by a downlink frequency receiving unit and identifies a faulty part of the radio base station apparatus, and a radio system using the same . Failure detection result performed by the radio base station apparatus itself after the plurality of radio base station apparatuses connected to the radio base station control apparatus using the line means are synchronized using a synchronization signal on the line 8. The radio base station apparatus according to claim 7, wherein a faulty part in the radio base station apparatus is identified based on a fault detection result by transmission and reception between the plurality of radio base station apparatuses . Was a wireless system . In a radio terminal of a frequency division duplex ( FDD ) radio communication system, a transmission / reception shared antenna, an uplink frequency transmission unit, a first downlink frequency reception unit, the uplink frequency transmission unit, and the first downlink frequency reception First antenna sharing means for sharing the transmission / reception shared antenna with each other, a receiving antenna, a first low-noise amplifier that down-converts an upstream frequency band to an intermediate frequency, a first frequency converter, and a first frequency converter And a second low-noise amplifier that down-converts the downstream frequency band to an intermediate frequency, a second frequency converter, and a second local oscillator. High frequency signal switching means for selecting one of the intermediate frequency signals output from the downlink frequency receiving unit and the first and second frequency conversion units and inputting the selected intermediate frequency signal to the intermediate frequency signal processing unit A baseband signal processing unit for extracting a baseband signal from an intermediate frequency signal output from the intermediate frequency signal processing unit, and the second downlink frequency receiving unit and the upstream frequency receiving unit Second antenna sharing means for sharing, and performing peripheral monitoring by receiving while sweeping an upstream frequency band by the upstream frequency receiving unit and the receiving antenna during a non-operation period, and the transmission / reception shared antenna A radio terminal that detects a failure of a radio terminal by receiving a transmission wave transmitted from the uplink frequency transmitter transmitted from the reception antenna and the uplink frequency receiver . The means for sharing the receiving antenna between the second downlink frequency receiving unit and the uplink frequency receiving unit includes a bandpass filter whose pass band is a downlink frequency band, and the receiving antenna and the second in normal operation. 10. The high-frequency signal switching means for connecting the downstream frequency receiving unit of the receiver via the band-pass filter and connecting the receiving antenna and the upstream frequency receiving unit in the failure detection mode. Wireless terminal . A directional coupler that extracts a part of the output of the uplink frequency transmitter, and a high frequency that is selected from the distributed output of the directional coupler and the received signal from the reception antenna and is input to the uplink frequency receiver 11. The wireless terminal according to claim 9, further comprising a signal switching unit . Transmission output level control means for setting the transmission output level of the uplink frequency transmission unit to be smaller than that during normal operation, the reception level detected by the uplink frequency reception unit, and the reception level for the intermediate frequency signal processing unit The wireless terminal according to claim 9 or 10, further comprising a threshold setting means for comparing with a value and a comparison means . The upstream frequency receiving unit extracts a part of a first frequency converter output for down-converting an upstream frequency band to an intermediate frequency, detects a level, and outputs the first frequency converter. 13. A narrow band-pass filter that extracts a part of the band and limits the band, and a second level detector that detects a level of an output of the narrow band band-pass filter. 13. Wireless terminal . The baseband signal processing unit includes a signal analysis unit including an A / D converter and a digital signal processing device. In the peripheral monitoring mode, the output signal of the upstream frequency reception unit is input to the signal analysis unit, and the baseband signal processing unit wireless terminal according to any one of claims 9 to 13, wherein the determining the communication scheme of the disturbance signal present.

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