JP2000138629A - Unwanted wave interference measurement method and wireless communication system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an unnecessary wave interference amount measuring method and a radio communication system capable of detecting an unnecessary wave signal existing in a sector band by a simple method and grasping an interference amount due to the unnecessary wave signal. . SOLUTION: An unnecessary wave interference amount measuring method for transmitting a space frame temporarily containing no information, detecting an unnecessary wave by measuring energy at the time of receiving the space frame, and measuring an interference amount due to the detected unnecessary wave, and wireless communication It is a communication system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring an interference amount in CDMA communication and a radio communication system, and more particularly, to a method for measuring an interference amount of an unnecessary wave capable of detecting an unnecessary wave in a band and measuring an interference amount due to the unnecessary wave. The present invention relates to a wireless communication system.

[0002]

2. Description of the Related Art CDMA (Code Division Multiple Acc)
ess) In communications, especially in cellular systems, the amount of mutual interference determines the system subscriber capacity, so understanding the amount of interference is an important technique.

[0003] The outline of the method of measuring the amount of interference in a conventional radio communication system is as follows. The amount of interference of an uplink signal from a mobile station to a base station is measured directly from a received signal at the base station, and the downlink signal from the base station to the mobile station. Regarding the amount of interference, the mobile station measures the amount of interference from the received signal, inserts it into the signal transmitted to the base station as a downlink interference amount report, and reports it, so that the base station has grasped the amount of system interference.

[0004] A portion (interference amount measuring section) for measuring the amount of interference in a conventional base station will be described with reference to FIG.
FIG. 5 is a configuration block diagram of a conventional interference amount measuring unit of a base station. For the sake of simplicity, FIG. 5 illustrates the case of three user signal channels (# 1 to # 3).

[0005] As shown in FIG. 5, an interference amount measuring section in a conventional base station includes an antenna 1, a receiver 2, three sets of despreading sections 3 and demodulating sections 4 corresponding to user signal channels.
An uplink interference measurement unit 5, a downlink interference report extraction unit 6 ',
It was composed of an averaging unit 9 and a control unit 10 '.

Next, each unit constituting the conventional interference amount measuring unit will be described. The antenna 1 is a receiving antenna for receiving an uplink signal from a mobile station to a base station. The receiver (RX in FIG. 5) 2 receives the received signal arriving at the antenna 1, performs radio processing such as frequency conversion, band limitation, quadrature detection and the like, and outputs it as a received baseband signal.

[0007] The despreading unit 3 performs despreading processing by multiplying and accumulating the baseband signal output from the receiver 2 and the received (RX) codes # 1 to # 3 input from the outside, respectively. It is output as a primary modulation wave.
The demodulation unit 4 receives the primary modulated wave output from each of the despreading units (# 1 to # 3) 3, demodulates and determines a threshold value, and receives the determination result as reception (RX) data (# 1 to # 3). # 3)
Is output.

[0008] The uplink interference measuring unit 5 includes a despreading unit (# 1 to # 1).
# 3) The primary modulated wave output from 3 is input, and the amount of uplink interference is measured. As a method of measuring the amount of interference, a known method such as a method of measuring the variance of signal points of a primary modulation signal can be realized.

[0009] The downlink interference report extraction unit 6 'includes a demodulation unit (# 1).
To # 3) 5 received (RX) data (# 1 to #
3), and extracts and outputs the downlink interference amount report inserted in each RX data.

The averaging section 9 averages and outputs each uplink interference amount measured by the uplink interference measuring section 5.

The control unit 10 'performs transmission power control based on the uplink interference amount and the downlink interference amount report, and performs various processes such as determining the maximum value of the total transmission power and estimating the subscriber capacity. is there.

Next, the operation of the conventional interference amount measuring section will be described with reference to FIGS. FIG. 6 shows a conventional CDMA.
FIG. 3 is an explanatory diagram showing a frame configuration of an uplink signal from a mobile station to a base station in a wireless communication system. Conventional CDMA
In the wireless communication system, each mobile station transmits a wireless frame in synchronization with a frame number (frame No. in FIG. 6) broadcast by the base station (user signals # 1 to # 3 in FIG. 6).
The signal arrives at the antenna 1 of the base station as an uplink signal in a form added in the air.

The uplink signal is first received by the antenna 1 of the base station, subjected to radio processing such as frequency conversion, band limitation, quadrature detection and the like by the receiver 2, output as a received baseband signal, and despreaded. (# 1 to # 3) are input to 3.

The despreading section (# 1 to # 3) 3 performs despreading processing on the supplied RX codes # 1 to # 3 to obtain primary modulated waves. Are demodulated by the demodulation units (# 1 to # 3), and received RX data # 1 to # 3 are output.

At this time, the primary modulated waves output from the despreading units (# 1 to # 3) 3 are input to the uplink interference measuring unit 5, where the interference amounts are measured, and the three interference amounts obtained are obtained. Is
The average is averaged by the averaging unit 9 and output as an uplink interference amount. Note that the interference amount measured here is measured as an interference amount including all interference from its own user signal, other user signals, and unnecessary waves included in the uplink signal.

On the other hand, in the received RX data (# 1 to # 3) obtained by the demodulation units (# 1 to # 3) 4, the downlink interference amount report measured by each mobile station is inserted as information. , Received RX data (# 1 to # 3) are input to the downlink interference report extraction unit 6 ', and only the part of the interference amount report information is extracted and output as the downlink interference amount report. In this case as well, the downlink interference amount to be reported is one type, and the interference amount measured as an interference amount including all interference from its own signal, other user signals, and unnecessary waves included in the downlink signal is reported. .

Then, the amount of uplink interference from the averaging unit 9 and
The downlink interference amount report from the downlink interference report extraction unit 6 'is input to the control unit 10', and the control unit 10 'performs transmission power control based on the uplink and downlink interference amounts, and also controls the total transmission power. Various processes such as determination of the maximum value and estimation of the subscriber capacity are performed.

[0018]

However, in the conventional method for measuring the amount of interference, both the base station and the mobile station have a user signal (a signal of a system subscriber who is making a call) within the band of each sector. In this case, the mutual interference between the user signals becomes dominant, so that an unnecessary wave signal (an interference wave other than the user signal) in the sector band is detected, and the There was a problem that the amount of interference could not be grasped.

The present invention has been made in view of the above circumstances, and detects an unnecessary wave signal existing in a sector band by a simple method, and measures an interference amount of the unnecessary wave which can grasp an interference amount due to the unnecessary wave signal. It is an object to provide a method and a wireless communication system.

[0020]

According to a first aspect of the present invention, there is provided a method for measuring an interference amount of an unnecessary wave, comprising transmitting a space frame that does not include information temporarily. The unnecessary wave is detected by the energy measurement at the time of receiving the space frame, and the amount of interference due to the detected unnecessary wave is measured, and unnecessary waves other than the user signal can be detected by the energy measurement at the time of receiving the space frame. The amount of interference due to unnecessary waves can be grasped.

According to a second aspect of the present invention, there is provided a method for measuring an amount of unnecessary wave interference according to the first aspect of the present invention, wherein the base station comprises a first frame of a space frame in an uplink signal. Number and a second frame number of the space frame in the downlink signal are determined and notified to the mobile station, and when the first frame number is reached, the mobile station transmits a space frame and the base station transmits the space frame. The received signal is used as the space frame to measure energy and interference, and when the second frame number is reached, the base station transmits a space frame, and the mobile station uses the received signal as the space frame. Measuring the amount of interference and transmitting the measurement result to the base station for reporting; Both the base station and the mobile station operate according to the timing of the system. For the uplink signal, the base station detects unnecessary waves other than the user signal, measures the amount of interference due to the unnecessary wave, and for the downlink signal, the mobile station uses the unnecessary wave. Is measured and reported to the base station, so that it is possible to accurately and accurately grasp the amount of interference due to both the uplink and downlink unnecessary waves.

According to a third aspect of the present invention, in a wireless communication system, a frame timing and a frame number are managed, and the number of a frame in which a space frame is transmitted in an uplink signal is disclosed. A first frame number, and a base station for notifying the number of the frame in which the space frame is transmitted in the downlink signal as the second frame number. The base station notifies the notification while synchronizing with the frame timing and generating the frame number. According to the first
A mobile station for recognizing the frame number and the second frame number, wherein the mobile station transmits a space frame with the first frame number and receives a space frame with the second frame number. A mobile station that performs interference amount measurement and transmits the measurement result as a downlink unnecessary wave interference amount report. The base station receives a space frame with the first frame number, performs energy measurement, and performs an uplink unnecessary wave. A base station that detects the amount of interference with the detected unnecessary uplink wave, transmits a space frame with the second frame number, and extracts the downlink unnecessary wave interference amount report from any received frame. Both the base station and the mobile station operate according to the timing of the space frame determined by the base station, and the base station transmits user signals for uplink signals. Unnecessary waves other than those are detected, the amount of interference due to unnecessary waves is measured, and for downlink signals, the amount of interference due to unnecessary waves is measured at the mobile station and reported to the base station. The amount of interference caused by unnecessary waves on both downlinks can be grasped.

According to a fourth aspect of the present invention, there is provided a radio communication system according to the third aspect, wherein the mobile station transmits an uplink space frame signal indicating whether or not the uplink signal is a space frame. A timing generation unit that supplies a downlink space frame signal indicating whether the downlink signal is a space frame, a reception unit that receives the downlink signal and converts the downlink signal into a reception baseband signal, and despreads the reception baseband signal. A despreading unit for outputting a primary modulation wave, a demodulation unit for demodulating the primary modulation wave and outputting received data, a downlink interference measuring unit for measuring a downlink interference amount of the primary modulation wave, and the timing generation The downlink interference amount is divided into an interference amount in a space frame and an interference amount in a non-space frame according to the downlink space frame signal from the unit and output. A channel switch, an averaging unit for averaging the interference amount at the time of the space frame and the interference amount at the time of the non-space frame, respectively, and outputting them as downlink unnecessary wave interference information and downlink desired wave interference information; Or a control unit for converting the downlink desired wave interference information for transmission, adding an identifier for identifying any of them and outputting the downlink interference report as a downlink interference report, and generating a transmission frame by attaching the downlink interference report to transmission data. A frame generation unit to
According to a downlink space frame signal from the timing generation unit, a space frame insertion unit that inserts a space frame between the transmission frames, and a transmission unit that modulates and spreads the transmission frame and the space frame and transmits the space frame. The mobile station is characterized in that it transmits the uplink space frame in a simple manner and accurately according to the timing of the space frame notified from the base station, and measures the interference amount of the space frame in the downlink signal. Then, the amount of interference due to unnecessary waves can be grasped and reported to the base station.

According to a fifth aspect of the present invention, there is provided a radio communication system according to the third or fourth aspect, wherein the base station indicates whether or not the uplink signal is a space frame. An uplink space frame signal, a downlink space frame signal indicating whether the downlink signal is a space frame, and a timing generator that supplies frame timing, and a receiver that receives the uplink signal and converts it into a reception baseband signal, An in-band spectrum analysis unit that performs energy measurement of the received baseband signal, and outputs a primary modulated wave by despreading the received baseband signal,
At least one despreading unit, an uplink interference measuring unit that measures an uplink interference amount of the primary modulation wave, and the uplink interference amount is different from an interference amount in a space frame according to an uplink space frame signal from the timing generation unit. A two-channel switch that separates and outputs the interference amount at the time of the space frame, and the interference amount at the time of the space frame and the interference amount at the time of the non-space frame are respectively averaged to obtain the uplink unnecessary wave interference amount or the uplink desired wave interference amount And an averaging unit that outputs received data by demodulating the primary modulated wave.
A downlink interference report that extracts a downlink interference report from the received data according to at least one demodulation unit and a frame timing from the timing generation unit and distinguishes and outputs a downlink unnecessary wave interference report or a downlink desired wave interference report by an identifier. The extraction unit, receives the result of the energy measurement, receives the uplink unnecessary wave interference amount and the downlink unnecessary wave interference report as unnecessary wave interference information, and requests the uplink desired wave interference amount and the downlink desired wave interference report. A control unit that receives and controls as wave interference information, a frame generation unit that generates a transmission frame of transmission data, and inserts a space frame between the transmission frames according to a downlink space frame signal from the timing generation unit. A space frame insertion unit, which modulates the transmission frame and the space frame A base station having a transmitting unit for spreading and transmitting, and transmits a space frame in a downlink signal in a simple manner and accurately, and an unnecessary wave in energy measurement of a space frame in an uplink signal. , The amount of interference due to unnecessary waves is grasped by measuring the amount of interference of the space frame, and the amount of interference due to unnecessary waves in the downlink signal can be grasped by extracting the downlink interference amount report transmitted from the mobile station.

According to a sixth aspect of the present invention, there is provided a wireless communication system according to the fifth aspect, wherein the downlink interference report extracting unit is configured to determine whether the downlink interference report is extracted in accordance with a frame timing from the timing generating unit. The timing of the report, the extraction timing generation unit that generates the timing of the identifier of the downlink interference report, the register that latches the identifier included in the received data according to the timing of the identifier of the downlink interference report, and the latched identifier is , A downlink unwanted wave interference report, a determination unit for determining whether to be a downlink desired wave interference report, and according to the determination result, output a downlink unwanted wave interference amount report output instruction signal or a downlink desired wave interference amount report output instruction signal And a decoder for storing received data, the timing of the downlink interference report, and the output instruction signal of the downlink unnecessary wave interference amount report. According, a first storage unit for outputting the received data said memory as a downlink undesired wave interference reports,
A second storage unit that stores received data, and outputs the stored received data as a downlink desired wave interference report according to the timing of the downlink interference report and an output instruction signal of the downlink desired wave interference amount report. The downlink interference report extraction unit is characterized by being able to extract the downlink interference amount report included in the received data from the mobile station by distinguishing it into a downlink unnecessary wave interference report or a downlink desired wave interference report by an identifier.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the claimed invention will be described with reference to the drawings. An interference amount measuring method and a wireless communication system according to the present invention transmit a space frame that does not include information temporarily, detect an unnecessary wave by measuring energy when the space frame is received, and measure an interference amount due to the detected unnecessary wave. Therefore, it is possible to detect an unnecessary wave signal existing in the sector band and grasp an interference amount due to the unnecessary wave signal.

First, an outline of an interference amount measuring method according to the present invention will be described with reference to FIG. FIG. 1 is an explanatory diagram showing an uplink / downlink frame configuration in the present invention. The interference amount measurement method of the present invention is based on the frame number managed by the base station, the base station uniquely determines any frame in the uplink signal and the downlink signal as a space frame, the mobile station Notice.

Here, the space frame is a frame in which a normal radio frame for transmitting a user data signal (user signal) is stopped to be a non-data signal (space signal). Then, for example, a frame number for inserting a space frame in an uplink signal is a first frame number, and a frame number for inserting a space frame in a downlink signal is a second frame number. The method of notifying the mobile station is a method of notifying all mobile stations in the area where the base station is located, and transmitting the first frame number and the second frame number to the mobile station using a notification channel or the like.

In the example of FIG. (N + 1)
Is a space frame in the uplink signal from the mobile station to the base station. (N + 2) is used as a space frame in the downlink signal from the base station to the mobile station.

Then, at an arbitrary frame number,
Both the base station and the mobile station transmit and receive a normal radio frame, and when the first frame number determined as an uplink space frame is reached, the mobile station stops the normal radio frame and transmits a space frame, and The station recognizes the received signal as the space frame, measures the energy of the received signal to detect unnecessary waves other than the user signal, and further calculates the amount of interference from the despread primary modulated wave for each user signal. The measurement is performed to grasp the interference amount of the unnecessary wave in the space frame, that is, the uplink.

When the second frame number determined to be the downlink space frame is reached, the base station stops the normal radio frame and transmits the space frame, and the mobile station transmits the received signal to the space frame. The interference amount is measured from the primary modulation wave of the received signal, and the measurement result is inserted into the user signal as a space frame, that is, a downlink unnecessary wave interference amount report, and transmitted to the base station. The interference amount report is extracted to grasp the interference amount of a downlink unnecessary wave.

Next, the configuration of the interference amount measuring section in the base station of the radio communication system for realizing the interference amount measuring method according to the present invention will be described with reference to FIG. FIG. 2 is a configuration block diagram of an interference amount measurement unit in the base station according to the present invention. Parts having the same configuration as in FIG. 5 are described with the same reference numerals. Note that, for simplification of description, FIG.
However, three user signal channels (# 1 to # 3) as in FIG.
Is described.

The interference measuring unit in the base station of the radio communication system according to the present invention is basically the same as the interference measuring unit of the conventional base station shown in FIG. , Three sets of despreading units 3 and demodulation units 4 corresponding to user signal channels, an uplink interference measurement unit 5, a downlink interference report extraction unit 6, an averaging unit 9, and a control unit 10, and As a characteristic part of the present invention, a two-channel switch 7, an in-band spectrum analyzing unit 8, an averaging unit 9 ',
A timing generation unit 11 is provided.

In the base station according to the present invention, the configuration of a transmission section for transmitting a space frame includes a conventional frame generation section 12, a modulation section 14, and a spreading section 15.
In addition to the adder 16, the adder 16, the transmitter 17, and the antenna 18, a space frame insertion unit 13 is provided as a feature of the present invention.

The antenna 1 and the receiver 2 shown in FIG.
Corresponds to the receiving section of claim 5, the averaging section 9 and the averaging section 9 'correspond to the averaging section of claim 5, and includes the modulation section 14, the spreading section 15, the adder 16, the transmitter 17, and the antenna. 1
Reference numeral 8 corresponds to the transmitting unit according to claim 5.

Next, each unit of the interference amount measuring unit in the base station according to the present invention will be specifically described. The antenna 1, the receiver 2, the despreading unit 3, the demodulating unit 4, the uplink interference measuring unit 5, the averaging unit Since the part 9 is completely the same as the conventional one, the description is omitted here, and only the characteristic part of the present invention will be described.

The downlink interference report extractor 6 receives the RX data (##) output from the demodulators (# 1 to # 3) 4 as in the prior art.
1 to # 3) are extracted and output, respectively. However, in the conventional configuration, there is only one type of downlink interference amount report, whereas in the present invention, there are a downlink interference amount report in a normal radio frame (non-space frame) and a downlink interference amount report in a space frame. And
It has a function of identifying the two types and capable of outputting independently. The circuit is realized on the premise that identification data (identifier) capable of identifying two types is inserted into the RX data and transmitted.

Here, a configuration example of the downlink interference report extraction unit 6 of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration example of the downlink interference report extraction unit 6 according to the present invention. Note that FIG. 3 shows only a component for processing one user channel (# 1) in the downlink interference report extraction unit 6, and when there are three user channels as shown in FIG. There will be three configurations.

The inside of the downlink interference report extraction unit 6 of the present invention
It comprises an extraction timing generation unit 61, a register 62, a determination unit 63, a decoder 64, a memory (0) 65, and a memory (1) 66. Note that the memory (0) 65 shown in FIG. 3 corresponds to a first storage unit of the present invention, and the memory (1) 66 corresponds to a second storage unit of the present invention.

The extraction timing generation unit 61 determines the timing of downlink interference report data (downlink interference report timing) and the timing of downlink interference report identifier (downlink interference report Identifier timing) is generated and output.

The register 62 includes an extraction timing generator 6
This register latches the identifier included in the RX data in accordance with the downlink interference report identifier timing supplied from 1.

The judgment section 63 is a judgment section for judging the identifier latched in the register 62 and outputting the judgment result. For example, if the content of the identifier is a downlink interference amount report at the time of a space frame, it outputs '0', and if the identifier is a downlink interference amount report at a non-space frame (normal radio frame), it outputs '1'.

The decoder 64 is a decoder that decodes the determination result of the determination unit 63 and outputs two enable signals, an enable 0 signal and an enable 1 signal. For example, in FIG. 3, the enable 0 signal (EN0 in FIG. 3) is enabled when the output of the determination unit 63 is “0”, and the enable 1 signal (EN in FIG. 3) when the output of the determination unit 63 is “1”. , EN1) are enabled. It should be noted that the fact that the enable 0 signal is enabled corresponds to the storage instruction signal of the downlink unnecessary wave interference amount report according to claim 6, and that the enable 1 signal is enabled. This corresponds to a storage instruction signal for the desired wave interference amount report.

The memory (0) 65 is a memory for storing the RX data in accordance with the timing of the downlink interference report supplied by the extraction timing generator 61 when the enable 0 signal output from the decoder 64 is in the enable state. The downlink interference report at the time of the included space frame (downlink unnecessary wave interference report) is stored. The stored result is configured to be referred to from the control unit 10.

The memory (1) 66 is a memory for storing RX data in accordance with the timing of the downlink interference report supplied by the extraction timing generator 61 when the enable 1 signal output from the decoder 64 is in the enable state. The downlink interference report (downlink desired wave interference report) at the time of the included normal radio frame is stored. The stored result is configured to be referred to from the control unit 10. With the above configuration, the downlink interference report extraction unit 6 in the present invention can be configured.

The two-channel switch 7 is a two-channel switch of Mth (where M value is the maximum number of users), and connects an input signal of Mth to any one of two channels by a 0/1 system selection signal input from the outside. Switch. The uplink interference measuring unit 5 is connected to the two-channel switch 7, and selects an output destination in accordance with an uplink space frame signal (described later), which is a 0/1 system selection signal from the outside. Of the upstream interference is divided into two systems, the 0 system and the 1 system, and output. Specifically, for example, when the upstream space frame signal is 0, it is determined to be a space frame and distributed to the 0 system output, and when the space frame signal is 1, it is determined to be other than the space frame and distributed to the 1 system output. .

The in-band spectrum analyzer 8 receives the baseband signal output from the receiver 2 and measures the spectrum (energy) of the upstream signal. The in-band spectrum analyzer 8 according to the present invention is configured so that an uplink space frame signal is input from the outside and the spectrum when the uplink space frame signal is “0” or “1” can be independently measured. Has become. That is, when the uplink space frame signal is "0", the spectrum measurement at the time of the space frame timing is performed, and the result is output to the outside as unnecessary wave energy. When the uplink space frame signal is "1", the space frame is measured. The spectrum is measured at a timing other than the above, and the result is output to the outside as the energy of the desired wave.

The in-band spectrum analyzer 8 is used to analyze the spectrum of the signal before despreading and to determine whether or not there is unnecessary energy in the band. In particular, in the spectrum analysis at the time of the space frame, since the system signal does not exist temporarily, the detection of the unnecessary signal becomes easy.

The averaging unit 9 averages the 0-system output that has passed through the two-channel switch 7 and outputs the value. The averaging unit 9 receives the upstream space frame signal, and performs averaging only during the space frame (when the upstream space frame signal is 0).

The averaging section 9 'averages the outputs of the first system that have passed through the two-channel switch 7, and outputs the averaged value. It should be noted that the upstream space frame signal is input to the averaging unit 9 ', and averaging is performed only during a normal radio frame (when the upstream space frame signal is 1).

The control unit 10 calculates an average value (uplink unnecessary wave interference amount) of the measurement result of the uplink interference amount output from the averaging unit 9,
The 0-system output (downlink unnecessary-wave interference report) of the downlink interference report extraction unit 6 is input as unnecessary-wave interference amount information, and the average value (uplink) of the measurement result of the uplink interference amount output from the averaging unit 9 ′ is output. The desired-wave interference amount) and the 1-system output (downlink-desired-wave interference report) of the downlink interference report extraction unit 6 are input as desired-wave interference amount information, and the spectrum information output by the in-band spectrum analysis unit 8 is input. Thus, the system is controlled based on the obtained information.

Since the contents of the control are so wide-ranging that they are not specifically described in the figure, for example, a system warning is urged based on the degree of interference of unnecessary waves. For example, the desired wave interference information, unnecessary wave interference information, and spectrum measurement result are information elements for various controls.

The timing generation section 11 generates the reference timing of the system, supplies the upstream space frame signal, the downstream space frame signal, the frame timing, and the like to the outside, and internally stores the frame number. Is managing.

Here, the uplink space frame signal is a signal indicating whether the uplink frame transmitted from the mobile station to the base station is a space frame. However, whether or not a certain uplink frame is a space frame is determined by the frame number managed by the base station. , The base station uniquely determines the frame number. (First frame number) to the mobile station, and it is assumed that the mobile station has confirmed the notification. The notification method can be a method of notifying all mobile stations in the area where the base station is located, or the like.

On this assumption, for example, when the upstream space frame signal is “0”, it indicates that the frame being processed is an upstream space frame, and at this time, the space frame is transmitted from the mobile station. Recognizes and operates. Conversely, when the uplink space frame signal is '1',
The frame being processed indicates that it is an uplink normal radio frame. At this time, it is recognized that the normal radio frame is being transmitted from the movement, and the entire interference amount measuring unit of the base station operates. .

The downlink space frame signal is a signal indicating whether the downlink frame transmitted from the base station to the mobile station is a space frame. Whether or not a certain downstream frame is a space frame, as in the case of the upstream frame,
Frame No. managed by the base station. , The base station is uniquely determined from the determined frame No. (Second frame number) to the mobile station, and it is assumed that the mobile station has confirmed the notification.

On the premise, for example, if the downlink space frame signal is “0”, it indicates that the frame being processed is a downlink space frame, and at this time, the base station transmits the space frame. Conversely, if the downlink space frame signal is "1", it indicates that the frame being processed is a downlink normal radio frame, and at this time, the base station transmits a normal radio frame.

The frame generator 12 receives the transmission (TX) data (# 1 to # 3) and forms each transmission radio frame (# 1 to # 3). There are various formats of the radio frame, but there is no particular limitation.

The space frame insertion unit 13 inserts a space frame between the transmission radio frames (# 1 to # 3) generated by the frame generation unit 12 according to the downlink space frame signal supplied from the timing generation unit 11. Things.

The modulating unit 14 includes the space frame inserting unit 1
The modulation unit (# 1 to # 3) that performs a modulation process on each of the transmission frame data (# 1 to # 3) into which the space frame has been inserted in 3 and outputs each primary modulation signal (# 1 to # 3). is there.

Spreading section 15 converts each primary modulation signal (# 1 to # 3) modulated by each modulation section 14 into each TX code (# 1 to # 3) input from the outside. (# 1 to # 3) that perform spreading processing and output as transmission baseband signals (# 1 to # 3).

The adder (+ in FIG. 2) 16
5 (# 1 to # 3) output baseband signals (#
1 to # 3), and outputs the combined transmission baseband signal.

The transmitter (TX in FIG. 2) 17 is the adder 1
6, the band is limited to the combined transmission baseband signal output from
It performs radio processing such as orthogonal modulation and frequency conversion, and outputs it as a transmission signal. The antenna 18 is connected to the transmitter 17
This is a transmission antenna that radiates the transmission signal output from the antenna into the air.

Next, the configuration of the interference measuring section in the mobile station of the radio communication system according to the present invention will be described with reference to FIG. FIG. 4 is a configuration block diagram of an interference amount measuring unit in the mobile station according to the present invention. Note that FIG. 4 is described assuming the case of user # 1 in FIG.

As shown in FIG. 4, the interference amount measuring section in the mobile station of the wireless communication system of the present invention
, Receiver 22, despreading unit 23, demodulating unit 24, downlink interference measuring unit 25, timing generating unit 26, two-channel switch 27, averaging unit 28, and averaging unit 28 '.
, Control section 29, despreading section 3, space frame insertion section 31, modulation section 32, spreading section 33, and transmitter 34.
And an antenna 35.

The antenna 21 and the receiver 2 shown in FIG.
2 corresponds to the receiving unit of claim 4, the averaging unit 28 and the averaging unit 28 'correspond to the averaging unit of claim 4, and the modulation unit 32, the spreading unit 33, and the transmitter 34 The antenna 35 and the antenna correspond to a transmitting unit according to a fourth aspect.

Next, each unit of the interference amount measuring unit in the mobile station according to the present invention will be specifically described. The antenna 21
The receiving antenna receives a downlink signal from the base station to the mobile station. The receiver (RX in FIG. 4) 22 receives the received signal arriving at the antenna 21, performs radio processing such as frequency conversion, band limitation, quadrature detection, and outputs the result as a received baseband signal.

The despreading unit 23 performs despreading processing by multiplying and accumulating the baseband signal output from the receiver 22 and the reception (RX) code # 1 input from the outside, respectively, to thereby perform the primary modulation wave. Is output. The demodulation unit 24 demodulates the primary modulation wave output from the despreading unit 23, makes a threshold determination, and outputs the determination result as reception (RX) data # 1.

The downlink interference measuring section 25 receives the primary modulated wave output from the despreading section 23 and measures the downlink interference amount. As a method of measuring the amount of interference, a known method such as a method of using the average value of known signal points (pilot symbols and the like) included in the primary modulation signal as a reference signal and measuring the variance from the reference signal point is used. It is possible.

The timing generator 26 outputs a downstream space frame signal and an upstream space frame signal to the outside. However, in the timing generation unit 26, the operation of the mobile station is already synchronized with the base station, and the generation of the frame timing and the frame number of the base station management are performed. It is assumed that it has been created.

The downlink space frame signal is a signal indicating whether the downlink frame transmitted from the base station to the mobile station is a space frame. On the above premise, the downlink space frame signal is synchronized with the frame timing, and the frame No. designated by the base station as being a space frame. This is a signal indicating that the frame is a space frame in (second frame number).

That is, for example, when the downlink space frame signal is '0', it indicates that the frame being processed is a downlink space frame. At this time, it is recognized that the base station is transmitting the space frame. Operate. Conversely, if the downlink space frame signal is '1', it indicates that the frame being processed is a downlink normal radio frame,
At this time, the base station operates by recognizing that a normal radio frame is being transmitted.

The uplink space frame signal is a signal indicating whether or not the uplink frame transmitted from the mobile station to the base station is a space frame. The uplink space frame signal is synchronized with the frame timing, and the frame N specified by the base station to be a space frame.
o. This is a signal indicating that the frame is a space frame in (first frame number).

That is, for example, when the frame to be processed is operated as an uplink space frame, the uplink space frame signal is set to '0', and at this time, the mobile station stops the normal radio frame and transmits the space frame. Conversely, when the frame to be processed is operated as an uplink normal radio frame, the uplink space frame signal is set to '1', and at this time, the mobile station transmits the normal radio frame.

The two-channel switch 27 calculates the amount of downlink interference output from the downlink interference
Switching according to the downlink space frame signal supplied by
It is a system that branches into the 0 system or 1 system and passes it. Specifically, for example, when the downlink space frame signal is '0', it is operated as a space frame and transmitted to the system 0, and when the downlink space frame signal is '1', it is operated as a normal radio frame and transmitted to the system 1. Shall be.

The averaging unit 28 includes a two-channel switch 27
Are averaged, and the value is output. The averaging unit 28 is supplied with a downlink space frame signal, and performs averaging only during a space frame (when the downlink space frame signal is 0).

The averaging unit 28 ′ has a two-channel switch 2
The output of the first system that has passed through 7 is averaged and its value is output. The averaging unit 28 'is supplied with a downlink space frame signal, and the averaging is performed only during a normal radio frame (when the downlink space frame signal is 1).

The control unit 29 inputs, as unnecessary wave interference information, the averaged value of the measurement result of the downlink interference amount at the time of the space frame output from the averaging unit 28, and the normal radio frame output from the averaging unit 28 '. The average value of the measurement result of the downlink interference amount at the time is input as desired wave interference information, and the obtained information is processed into a form to be reported to the base station, and then output as a downlink interference report. At this time, an identifier for identifying whether the report is a downlink interference report in a space frame or a normal radio frame is added and output.

The frame generation section 30 is a section for receiving the downlink interference amount report and transmission (TX) data # 1 output from the control section 29 and forming a transmission radio frame including both. There are various formats of the radio frame, but there is no particular limitation.

The space frame insertion unit 31 inserts a space frame between transmission radio frames generated by the frame generation unit 30 in accordance with the upstream space frame signal supplied from the timing generation unit 26.

The modulating section 32 includes a space frame inserting section 3
In step 1, the transmission frame data in which the space frame is inserted is subjected to modulation processing, and a primary modulation signal is output.

The spreading section 33 performs spreading processing on the primary modulation signal modulated by the modulation section 32 using a TX code # 1 input from the outside, and outputs the result as a transmission baseband signal. is there.

The transmitter (TX in FIG. 4) 34 is
3 performs radio processing such as band limitation, quadrature modulation, and frequency conversion on the transmission baseband signal output from the transmission baseband signal 3, and outputs the transmission baseband signal as a transmission signal. The antenna 35 is a transmission antenna that radiates a transmission signal output from the transmitter 34 into the air.

Next, the operation of the wireless communication system of the present invention will be described with reference to FIGS. 1, 2, 3 and 4. For the sake of simplicity, FIG. 2 shows three user signal channels (# 1 to # 3), and FIGS. 3 and 4 describe only # 1 among them. Also, as a premise, synchronization of the mobile station with the base station has been completed, and the frame timing, frame No. Is generated in the mobile station. This premise is not a special example and does not particularly hinder patentability.

First, the base station manages its own frame number. Arbitrarily determine the frame into which the space frame is to be inserted. The insertion of the space frame is performed for both the uplink signal and the downlink signal. (The first and second frame numbers) to the mobile station. In FIG. An uplink space frame is inserted at (n + 1) and a downlink space frame is inserted at (n + 2).

The notification to the mobile station can be made using a broadcast channel or the like. The purpose of inserting a space frame is to temporarily stop uplink or downlink transmission, measure unnecessary wave energy and unnecessary wave interference during the stop time, grasp the damage to the system from these unnecessary waves, and operate the system. There is to utilize it. The mobile station that has received the notification transmits the frame No. for inserting the space frame. Performs a desired process.

Referring to FIG. Up to n, both the base station and the mobile station perform a normal transmission / reception state, so that the operation in the normal transmission / reception state will be described first.
In the mobile station shown in FIG. 4, a downlink signal from the base station is received by antenna 21, radio processing is performed by receiver 22 to obtain a reception baseband signal, and despreading section 23 performs RX processing.
The code # 1 performs a despreading process to obtain a primary modulated wave, which is demodulated by the demodulation unit 24 to obtain received (RX) data.

At this time, the primary modulated wave obtained by the despreading unit 23 is input to the downlink interference measuring unit 25, and the interference signal power (downlink interference amount) included in the primary modulated wave is measured. Is output to

At this time, since the frame is a downlink normal radio frame, the downlink space frame signal output from the timing generator 26 becomes “1” indicating a non-downlink space frame state, and the two-channel switch 27 is connected to the first system. The downlink interference amount from the downlink interference measuring unit 25 is 1
After being output to the system and averaged by the averaging unit 28 ', it is output to the control unit 29 as downlink interference information of the desired wave.

After the control unit 29 attaches an identifier indicating the report of the amount of interference in the downlink desired wave to the received desired wave interference information, the information is transmitted to the frame generation unit 30 as a downlink interference amount report. , Frame generation unit 30
Generates a radio frame including the transmission (TX) data # 1 and the downlink interference amount information.
Is output to

At this time, since the upstream space frame signal supplied from the timing generation unit 26 indicates “1” indicating a non-space frame, the radio frame is input to the modulation unit 32 without inserting a space frame. After the radio frame data is converted into a primary modulation wave by the modulation unit 32, the radio frame data is spread by the spreading unit 33, converted into a radio signal by the transmitter 34, and then transmitted from the antenna 35 as an uplink signal.

[0092] Then, in the base station shown in FIG. 2, the uplink signal is received by the antenna 1 and subjected to radio processing by the receiver 2 to obtain a received baseband signal, which is input to the in-band spectrum analyzer 8. You. At this time, since the frame is a non-space frame, the upstream space frame signal of “1” indicating the non-space frame is supplied from the timing generation unit 11 to the in-band spectrum analysis unit 8, and the in-band spectrum analysis unit 8 outputs the upstream signal ( At this time, the spectrum of a normal radio frame is measured and output to the control unit 10.

On the other hand, the baseband signal output from the receiver 2 is input to each of the despreading sections 3 (# 1 to # 3), and each of the despreading sections 3 separates a different RX code (# 1 to # 3), the channels are discriminated, despreading is performed, each primary modulated wave is obtained, and each demodulation unit 4 (# 1 to # 3) performs demodulation processing. Each RX
Output as data # 1 to # 3.

At this time, the primary modulated wave output from each despreading unit 3 is input to the uplink interference measuring unit 5, the amount of uplink interference is measured for each channel, and input to the two-channel switch 7. At this time, since the frame is a non-space frame, the uplink space frame signal supplied from the timing generation unit 11 is “1” indicating a non-space frame, so the uplink interference amount input to the two-channel switch 7 is The signal is averaged by the averaging unit 9 ', and is output to the control unit 10 as the amount of uplink desired wave interference.

Also, since the downlink interference amount report is inserted in the RX data, the RX data output from the demodulation unit 4 is input to the downlink interference report extraction unit 6, and only the downlink interference amount report is extracted. Is done.

The specific operation of the downlink interference report extraction unit 6 is based on the assumption that the downlink interference amount report is inserted at a known timing in the radio frame, and the timing generation unit 1
The frame timing supplied from 1 is input to the extraction timing generation unit 61, and the extraction timing generation unit 61 outputs the downlink interference report timing and the downlink interference report identifier timing according to the frame timing.

On the other hand, the reception (R
X) The data is input to the register 62, the memory (0) 65, and the memory (1) 66. The register 62 latches the identifier included in the RX data in accordance with the downlink interference report identifier timing, and the determination unit 63 determines the identifier. Since the content of the identifier is “1” indicating the downlink interference amount report at the time of the normal radio frame, the enable 1 signal (EN 1 in FIG. 3) is enabled by the decoder 64 and the memory ( 1) Extraction timing generator 61 at 66
RX data is stored in accordance with the timing of the downlink interference report supplied from the base station, the downlink interference report in the normal radio frame included in the RX data is stored, and is reported to the control unit 10 as a downlink desired wave interference report.

With the above operation, the uplink desired wave interference information from the averaging unit 9 'and the downlink desired wave interference report from the downlink interference report extraction unit 6 are converted into the desired wave interference information by the control unit 10
The system is controlled based on the information obtained along with the spectrum information from the in-band spectrum analyzer 8.

Next, as shown in FIG. The operation when (n + 1) is the upstream space frame signal timing will be described. First, the uplink space frame signal of the timing generator 26 of the mobile station shown in FIG. 4 changes to “0” indicating a space frame, and the space frame inserter 31 accordingly adjusts the radio frame transmitted from the frame generator 30. A space frame is inserted between them.

As described on the premise, since the timing synchronization with the base station has already been established, the timing supply from the timing generator 26 can be realized without any problem. Also, there is no information in the space frame, and special data is set such that a space signal (no signal) is transmitted during transmission.

The transmission frame into which the space frame is inserted by the space frame insertion unit 31 is converted into a primary modulation wave by the modulation unit 32, and is then spread by the spreading unit 33.
The signal is converted into a radio signal (no signal) by the transmitter 34 and the antenna 3
5 is sent out.

The transmitted uplink signal is received by the antenna 1 of the base station shown in FIG. 2, converted into a baseband signal by the receiver 2, and input to the in-band spectrum analyzer 8. At this time, since the frame is a space frame, an uplink space frame signal of “0” indicating the space frame is transmitted from the timing generation unit 11 to the in-band spectrum analysis unit 8.
The spectrum of the upstream signal (space frame in this case) is measured by the in-band spectrum analyzer 8, the unnecessary wave energy in the band is detected, and the result is output to the controller 10. With the above operation, the unnecessary wave can be detected.

On the other hand, the received baseband signal is despread in each despreading section 3 to obtain a primary modulated signal, the amount of interference is measured in the uplink interference wave measuring section 5, and output to the two-channel switch 7. You. Here, since the uplink signal is a null signal for all the mobile stations in the serving sector or cell, the primary modulation wave output from each despreading unit 3 does not include the desired signal component, and is derived from in-band energy other than the mobile station uplink transmission signal. Can be measured. In this case, in a normal radio frame, the average of known signal points (pilot symbols and the like) is used as a reference signal, and interference power is measured by dispersion from the signal point. Therefore, the signal point becomes the origin, and the interference measurement can be performed by the dispersion from the signal point.

At this time, since the frame is a space frame, the uplink space frame signal supplied from the timing generator 11 is “0” indicating a space frame, and the input uplink interference amount is 0 in the two-channel switch 7. The signal is output to the system, averaged by the averaging unit 9, and output to the control unit 10 as an uplink interference amount of an unnecessary wave. With the above operation, the amount of uplink interference due to unnecessary waves can be grasped.

Next, as shown in FIG.
Becomes (n + 2), it is time to turn the downlink signal into a space frame. First, the downlink space frame signal of the timing generation unit 11 of the base station shown in FIG. 2 becomes “0” indicating the space frame, and the space frame is inserted accordingly. The unit 13 inserts a space frame between the radio frames sent from the frame generation unit 12. As in the mobile station, there is no information in the space frame, and special data is set such that a space signal (no signal) is transmitted during transmission.

The transmission frame of each channel, into which the space frame has been inserted by the space frame insertion unit 13, is converted into a primary modulation wave by the modulation unit 14, then spread by the spreading unit 15, and added by the adder 16. , And is converted into a radio signal (no signal) by the transmitter 17.
Sent out.

The transmitted downlink signal arrives at the antenna 21 of the mobile station shown in FIG. 4, is converted into a baseband signal by the receiver 22, and is despread by the despreading unit 23 to obtain a primary modulation signal. The amount of interference is measured by the downlink interference measurement unit 25 and output to the two-channel switch 27.

Since the downlink signal has no signal (space frame) in all channels, the primary modulation wave output from the despreading unit 23 does not include a desired signal component, and is derived from in-band energy other than the downlink transmission signal from the base station. Interference can be measured.
Similar to the uplink interference measuring unit 5 in the base station, the interference measurement can be performed based on the variance from the origin, which is a signal when there is no signal.

At this time, since the frame is a downlink space frame, the downlink space frame signal output from the timing generator 26 becomes “0” indicating the downlink space frame state, and the 2-channel switch 27 is connected to the 0 system. , The amount of downlink interference from the downlink interference measurement unit 25 is 0
After being output to the system and averaged by the averaging unit 28,
It is output to control unit 29 as the amount of downlink interference of unnecessary waves.

[0110] In the control section 29, after the received unnecessary wave interference information is attached with an identifier indicating that it is a report of the amount of interference in the downlink unnecessary wave, the information is transmitted to the frame generation section 30 as the downlink interference amount report. , Frame generation unit 30
Then, a normal radio frame including transmission (TX) data # 1 and downlink interference amount information is formed and output to space frame insertion section 31.

Then, the uplink space frame signal from the timing generation section 26 is output to the modulation section 32 at the time of a normal radio frame in which it is “1”, modulated by the modulation section 32, spread by the spreading section 33, and transmitted by the transmitter 34. Radio processing is performed and the signal is transmitted as an uplink signal.

Then, the base station performs the same reception processing as described above, determines the identifier attached to the downlink interference amount report in downlink interference report extractor 6, and determines that the report content is a downlink unnecessary wave interference report. Judgment is made, and the content is reported to the control unit 10 as a downlink unnecessary wave interference report.

With the above operation, the control unit 10 obtains the unnecessary unnecessary wave interference information from the averaging unit 9 and the unnecessary unnecessary wave interference report from the downstream interference report extraction unit 6 as unnecessary wave interference information, and The system is controlled based on the information obtained together with the spectrum information from the spectrum analyzer 8.

According to the unnecessary wave interference amount measuring method of the present invention, a space frame containing no information is transmitted temporarily, and the energy (unwanted wave energy) and interference amount (unwanted wave interference) at the time of receiving the space frame are received. And measure
There is an effect that the unnecessary wave is detected, the damage to the system is grasped by measuring the interference amount of the unnecessary wave, and the system can be utilized for system operation.

Further, according to the radio communication system of the present invention, the base station side determines the uplink / downlink space frame insertion timing (first and second frame numbers) in advance and notifies the mobile station of the timing. According to the timing determined by both the base station and the mobile station, the result of the energy measurement and the interference amount measurement is used while recognizing whether the frame is a space frame or a normal radio frame. There is an effect that the amount of unnecessary wave interference can be measured.

Further, according to the radio communication system of the present invention, the base station uses the uplink / downlink space frame signal supplied from the timing generator 11 and the mobile station uses the uplink / downlink space frame signal to supply the space frame or Since the operation is performed by judging whether the frame is a normal radio frame and the two-channel switch 7 or the two-channel switch 27 is used, the energy and the interference amount of the unnecessary wave and the desired wave can be easily reduced with a configuration not so different from the conventional one. There is an effect that can be grasped.

Further, according to the present invention, when an unnecessary signal is detected in the system band, for example, a system warning is urged based on the degree of the interference amount, and if the signal type can be canceled, the control resource is canceled. It can be used, and there are many advantages in system operation.

As described in detail above, according to the present invention, the detection of the unnecessary wave in both the upstream and downstream, the amount of interference of the desired wave, and the in-band unnecessary wave energy in the upstream signal can be accurately and simply grasped. This is very effective because the information can be effectively used for system control.

[0119]

According to the first aspect of the present invention, a space frame that does not include information is transmitted temporarily, an unnecessary wave is detected by measuring the energy when the space frame is received, and the amount of interference caused by the detected unnecessary wave is determined. Since the interference amount measurement method is used to measure, the unnecessary wave other than the user signal is detected by measuring the energy when the space frame is received, and the interference amount due to the unnecessary wave is grasped by measuring the interference amount when the space frame is received. There is an effect that can be used for control.

According to the second aspect of the present invention, when the first frame number and the second frame number determined by the base station are notified to the mobile station, and when the first frame number is reached,
The mobile station transmits a space frame, the base station measures the energy and the amount of interference using the received signal as the space frame, and when the second frame number is reached, the base station transmits the space frame, and the mobile station transmits the space frame. Measure the amount of interference using the received signal as the space frame,
The method for measuring the amount of unnecessary wave interference according to claim 1, wherein the measurement result is transmitted to the base station and reported, so that both the base station and the mobile station operate according to the timing of the space frame determined by the base station, and Is a simple method because the base station detects unnecessary waves other than user signals, measures the amount of interference due to unnecessary waves, and for downlink signals, measures the amount of interference due to unnecessary waves at the mobile station and reports it to the base station. And accurately grasp the amount of interference due to unnecessary waves on both the uplink and downlink,
There is an effect that can be used for system control.

According to the third aspect of the present invention, the base station manages the frame timing and the frame number, and the first frame number for transmitting the space frame by the uplink signal and the first frame number for transmitting the space frame by the downlink signal. 2 to the mobile station, the mobile station synchronizes with the frame timing, generates the frame number, recognizes the first and second frame numbers according to the notification, and uses the first frame number to generate a space. The base station receives the uplink space frame and performs energy measurement and interference amount measurement. Conversely, the base station transmits the space frame with the second frame number, and the mobile station transmits the downlink space frame. The base station receives the frame, measures the amount of interference, transmits the measurement result as a downlink unnecessary wave interference report, and the base station reports the downlink unnecessary wave interference amount. Since it is a wireless communication system that extracts from the received frame, both the base station and the mobile station operate according to the timing of the space frame determined by the base station, and the base station detects unnecessary waves other than user signals for uplink signals, and The amount of interference due to waves is measured, and for downlink signals, the amount of interference due to unnecessary waves is measured at the mobile station and reported to the base station. There is an effect that can be grasped and utilized for system control.

According to the fourth aspect of the present invention, the timing generation section of the mobile station transmits the uplink space frame signal and the downlink space frame signal according to the first frame number and the second frame number notified from the base station. Supply,
The downlink signal is received by the receiving unit, the primary modulation wave despread by the despreading unit is read by the downlink interference measuring unit, the downlink interference amount is measured, and the downlink interference amount is space-spaced by the 2-channel switch according to the downlink space frame signal. The amount of interference at the time of the frame and the amount of interference at the time of the non-space frame are separated, and each downlink interference amount is averaged by the averaging unit and output as the downlink unnecessary wave interference amount or the downlink desired wave interference amount. Output the amount of unnecessary downlink interference or desired downlink interference,
A frame generation unit attaches the transmission data to the transmission data to generate a transmission frame, a space frame insertion unit inserts a space frame between the transmission frames according to a downlink space frame signal, and modulates and spreads the transmission frame to transmit. 3, the mobile station inserts and transmits the space frame in the uplink signal according to the timing of the space frame notified from the base station, and accurately and accurately performs the space frame in the downlink signal. It is possible to measure the interference amount at the time and at the time of the non-space frame, identify the interference amount due to the unnecessary wave and the interference amount due to the desired wave, and report the result to the base station.

According to the fifth aspect of the present invention, the timing generation section of the base station supplies the upstream space frame signal, the downstream space frame signal, and the frame timing according to the first frame number and the second frame number. ,
The receiver receives the uplink signal, converts it to a baseband signal, measures the energy of the baseband signal with the in-band spectrum analyzer, reads the primary modulated wave obtained by despreading the baseband signal with the despreader, and reads the signal. The amount of uplink interference is measured by the interference measurement unit, and the amount of uplink interference is divided into an amount of interference in a space frame and an amount of interference in a non-space frame according to an uplink space frame signal by a two-channel switch, and each uplink interference amount is averaged. Averaging is performed by the demodulation unit and output as an uplink unnecessary wave interference amount or an uplink desired wave interference amount. Further, the primary modulation wave is demodulated by the demodulation unit to obtain reception data, and the downlink interference report extraction unit receives the data according to the frame timing. The downlink interference report is extracted from the data and acquired as a downlink unnecessary wave interference report or a downlink desired wave interference report, and the control unit transmits the uplink baseband signal energy. And the uplink / downlink unnecessary wave interference information and the uplink / downlink desired wave interference information, and perform control in accordance therewith. On the other hand, a frame generation unit generates a transmission frame, and a space frame insertion unit generates a downlink space. The radio communication system according to claim 3 or 4, wherein a space frame is inserted between transmission frames according to the frame signal and modulated and spread by the transmission unit and transmitted. According to the above, while transmitting by inserting a space frame in the downlink signal and detecting the unnecessary wave or the desired wave by measuring the energy in the space signal or the non-space frame in the uplink signal, the interference in the space frame or the non-space frame The amount of interference due to unwanted or desired waves is measured by In the meantime, since the downlink interference amount report from the mobile station is extracted by discriminating the unnecessary wave or the desired wave, it is possible to accurately and accurately detect the unnecessary wave and to detect the interference amount due to both the uplink and downlink unnecessary waves by a simple method. Understand
There is an effect that can be used for system control.

According to the sixth aspect of the present invention, in the downlink interference report extractor, the extraction timing generator generates the timing of the downlink interference report and the timing of the identifier of the downlink interference report according to the frame timing, and the register
The identifier included in the received data is latched in accordance with the timing of the identifier of the downlink interference report, and the determining unit determines whether the latched identifier is the downlink interference report of the unnecessary wave or the downlink interference report of the desired wave, and the decoder determines according to the determination result. And outputting a downlink interference amount report storage instruction signal of an unnecessary wave or a downlink interference amount report storage instruction signal of a desired wave, and the first storage unit outputs a downlink interference amount report storage instruction signal of the unnecessary wave and a timing of the downlink interference report. And the second storage unit stores the received data as a downlink desired wave interference report according to the downlink interference amount report storage instruction signal of the desired wave and the timing of the downlink interference report. The wireless communication system according to claim 5, wherein the downlink interference amount report included in the reception data reported from the mobile station is identified by an identifier to be a downlink unnecessary signal. Reported or downlink expected wave interference report the effect which can be taken to distinguish.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an up / down frame configuration according to the present invention.

FIG. 2 is a configuration block diagram of an interference amount measurement unit in the base station according to the present invention.

FIG. 3 is a block diagram illustrating a configuration example of a downlink interference report extraction unit according to the present invention.

FIG. 4 is a configuration block diagram of an interference amount measurement unit in the mobile station according to the present invention.

FIG. 5 is a configuration block diagram of a conventional interference amount measuring unit of a base station.

FIG. 6 is an explanatory diagram showing a frame configuration of an uplink signal from a mobile station to a base station in a conventional CDMA wireless communication system.

[Explanation of symbols]

1 ... antenna, 2 ... receiver, 3 ... despreading unit, 4 ...
Demodulation unit, 5 ... Uplink interference measurement unit, 6, 6 '... Downlink interference report extraction unit, 7 ... 2-channel switch, 8 ... In-band spectrum analysis unit, 9, 9' ... Averaging unit, 10, 1
0 ': control unit, 11: timing generation unit, 12: frame generation unit, 13: space frame insertion unit, 14
... Modulation unit, 15 ... Diffusion unit, 16 ... Adder, 17 ...
Transmitter 18 Antenna 21 Antenna 22
... Receiver, 23 ... Despreading unit, 24 ... Demodulation unit, 25 ...
Downlink interference measurement unit, 26 ... timing generation unit, 27 ...
2 channel switch, 28, 28 '... averaging unit, 2
9: control unit, 30: frame generation unit, 31: space frame insertion unit, 32: modulation unit, 33: spreading unit,
34 ... Transmitter, 35 ... Antenna, 61 ... Extraction timing generator, 62 ... Register, 63 ... Determiner, 6
4: Decoder, 65: Memory (0), 66: Memory (1)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04B 17/00 H04B 17/00 FF term (reference) 5K042 AA06 BA08 CA02 DA01 EA09 FA11 LA06 MA04 5K052 BB08 CC06 DD04 EE11 5K067 AA11 AA22 BB03 CC10 DD42 DD43 DD44 DD48 EE02 EE10 EE61 EE71 GG01 GG09 GG11 HH24 HH27 LL11

Claims (6)

[Claims] 1. A space frame that temporarily does not include information is transmitted, an unnecessary wave is detected by measuring energy at the time of receiving the space frame, and an interference amount due to the detected unnecessary wave is measured. Wave interference measurement method. 2. The base station determines a first frame number of a space frame in an uplink signal and a second frame number of a space frame in a downlink signal, and notifies the mobile station of the first frame number. When the number becomes the number, the mobile station transmits a space frame, and the base station measures the energy and the amount of interference using the received signal as the space frame. When the number becomes the second frame number, the base station 2. The unnecessary wave according to claim 1, wherein the mobile station transmits a space frame, the mobile station measures the amount of interference using the received signal as the space frame, and transmits and reports the measurement result to the base station. Interference measurement method. 3. A frame number and a frame number are managed, a frame number in which a space frame is transmitted in an uplink signal is set as a first frame number, and a frame number in which a space frame is transmitted in a downlink signal is set as a first frame number. And a mobile station that recognizes the first frame number and the second frame number in accordance with the notification while generating a frame number in synchronization with the frame timing. The mobile station transmits a space frame with the first frame number, receives a space frame with the second frame number, performs interference amount measurement, and transmits the measurement result as a downlink unnecessary wave interference amount report. The base station receives a space frame with the first frame number and performs energy measurement. A base station that detects an uplink unnecessary wave, performs an interference amount measurement by the detected uplink unnecessary wave, transmits a space frame with the second frame number, and extracts the downlink unnecessary wave interference amount report from an arbitrary received frame. A wireless communication system, characterized in that: 4. A timing generator for supplying an uplink space frame signal indicating whether an uplink signal is a space frame and a downlink space frame signal indicating whether a downlink signal is a space frame. Receiving a baseband signal, and despreading the received baseband signal to output a primary modulation wave; demodulating the primary modulation wave to output reception data And a downlink interference measuring unit that measures the downlink interference amount of the primary modulation wave, and the downlink interference amount according to the downlink space frame signal from the timing generation unit. A two-channel switch that separates and outputs the amount of interference in the space frame and the amount of interference in the non-space frame. An averaging unit that averages and outputs as downlink unnecessary wave interference information and downlink desired wave interference information; and an identifier for converting the downlink unnecessary wave interference information or the downlink desired wave interference information for transmission, and identifying any of them. A control unit for adding a downlink interference report to the transmission data, generating a transmission frame by attaching the downlink interference report to transmission data, and transmitting the transmission frame according to a downlink space frame signal from the timing generation unit. The mobile station according to claim 3, wherein the mobile station comprises a space frame insertion unit that inserts a space frame, and a transmission unit that modulates, spreads, and transmits the transmission frame and the space frame. Wireless communication system. 5. A timing generating section for supplying an uplink space frame signal indicating whether an uplink signal is a space frame, a downlink space frame signal indicating whether a downlink signal is a space frame, and a frame timing. A receiving unit that receives an uplink signal and converts it into a received baseband signal; an in-band spectrum analyzing unit that measures energy of the received baseband signal; and a primary modulation wave by despreading the received baseband signal. Outputting at least one despreading unit; an uplink interference measuring unit for measuring an uplink interference amount of the primary modulated wave; and an interference at the time of a space frame according to the uplink space frame signal from the timing generation unit. A two-channel switch that separates and outputs the amount and the amount of interference in a non-space frame; An averaging unit for averaging the interference amount at the time of the frame and the interference amount at the time of the non-space frame, respectively, and outputting as an uplink unnecessary wave interference amount or an uplink desired wave interference amount, and demodulating the primary modulation wave to receive data. Outputting at least one demodulation unit, and extracting a downlink interference report from the received data in accordance with a frame timing from the timing generation unit, and distinguishing and acquiring a downlink unnecessary wave interference report or a downlink desired wave interference report by an identifier. A downlink interference report extraction unit, acquires the result of the energy measurement, acquires the uplink unnecessary wave interference amount and the downlink unnecessary wave interference report as unnecessary wave interference information, and obtains the uplink desired wave interference amount and the downlink desired wave. A control unit that performs control by acquiring an interference report as desired wave interference information, a frame generation unit that generates a transmission frame of transmission data, A space frame insertion unit that inserts a space frame between the transmission frames in accordance with a downlink space frame signal from the imaging unit; and a transmission unit that modulates / spreads the transmission frame and the space frame and transmits the modulated frame. The wireless communication system according to claim 3 or 4, wherein the wireless communication system is a base station. 6. The downlink interference report extraction unit according to a frame timing from a timing generation unit,
An extraction timing generation unit that generates a timing of a downlink interference report and a timing of an identifier of a downlink interference report; a register that latches an identifier included in received data according to the timing of the identifier of the downlink interference report; The identifier is a downlink unnecessary wave interference report or a determination unit that determines whether the downlink desired wave interference report. According to the determination result, a storage instruction signal of the downlink unnecessary wave interference amount report, or a storage instruction signal of the downlink desired wave interference amount report. A first storage unit that stores received data as a downlink unnecessary wave interference report according to a storage instruction signal of the downlink unnecessary wave interference amount report and a timing of the downlink interference report, According to the storage instruction signal of the interference amount report and the timing of the downlink interference report, the received data is stored as the downlink desired wave interference report. Second wireless communication system according to claim 5, characterized in that the downlink interference report extracting unit having a storage unit that.