JP5095503B2 - Wireless repeater amplifier - Google Patents

Description

  The present invention relates to a wireless relay amplification system having, for example, a wireless base station device and a wireless relay amplification device, and in particular, specifies a location of the wireless relay amplification device using a location information service (LCS: LoCation Service) and installs the wireless relay amplification device. The present invention relates to a technique for using operation information of a radio base station apparatus existing around a place to determine a gain value of a radio relay amplification apparatus.

FIG. 8 shows a configuration example of a wireless relay amplifying device in the prior art.
The wireless relay amplification apparatus of this example includes a gain control unit 61, a base station filter unit 62, a mobile station filter unit 63, a downlink amplification unit 64, and an uplink amplification unit 65.
The gain control unit 61 sets the gain value of amplification used by the downstream amplification unit 64 and the upstream amplification unit 65. The base station filter unit 62 limits and separates the input / output radio signal on the base station antenna side. The mobile station filter unit 63 limits and separates the input / output radio signal on the mobile station antenna side. The downlink amplification unit 64 amplifies the downlink signal from the radio base station apparatus to the mobile station apparatus. The uplink amplifying unit 65 amplifies the uplink signal from the mobile station device to the radio base station device.

Next, the operation of the wireless relay amplification apparatus of this example will be described.
A downlink signal from the radio base station apparatus to the mobile station apparatus is wirelessly received by an antenna (not shown) on the base station side and input to the base station filter unit 62, and band limitation is performed by the base station filter unit 62. Are separated from the upstream signal and input to the downstream amplifier 64. In the downlink amplification unit 64, the downlink signal is amplified by the predetermined gain value set by the gain control unit 61, and the resulting signal is input to the mobile station filter unit 63. This signal is shared with the uplink signal by the mobile station filter unit 63 and output to an antenna (not shown) on the mobile station side.

  On the other hand, an uplink signal from the mobile station apparatus to the radio base station apparatus is wirelessly received by an antenna (not shown) on the mobile station side and input to the mobile station filter unit 63, and the mobile station filter unit 63 Band limitation and separation from the downlink signal are performed, and the resultant signal is input to the upstream amplification unit 65. In the upstream amplification unit 65, the upstream signal is amplified by a predetermined gain value set by the gain control unit 61, and the resultant signal is input to the base station filter unit 62. This signal is shared with the downlink signal by the base station filter unit 62 and output to an antenna (not shown) on the base station side.

Here, determination of the gain set by the gain control unit 61 will be described.
In the prior art, the gain value is adjusted and operated when the wireless relay amplification device is installed. For example, the antenna end output of the radio base station apparatus and the electric field at the installation location are actually measured to be {loss = (antenna end output−measured value)}, and a control value giving a gain to compensate for the loss is determined as the gain value. The gain value was set to be fixed.

JP 2003-188806 A

  However, in the gain adjustment method in the conventional radio relay amplifying apparatus as described above, since the operation is performed with a fixed gain at the time of installation, for example, the addition of the radio base station apparatus to the service area, the radio base station apparatus When there is a movement or a change in transmission power, there is a problem that the gain value does not match the actual condition, and it becomes necessary to readjust or reset. Further, when considering that the user himself / herself moves and installs the wireless relay amplification device itself, there is a problem that the same readjustment or resetting is required.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a wireless relay amplification device capable of effectively setting an amplification gain value.

In order to achieve the above object, in the present invention, a radio relay amplifying apparatus that relays and amplifies signals communicated between a radio base station apparatus and a mobile station apparatus has the following configuration.
That is, the position information acquisition unit acquires information related to the position of the wireless relay amplification device. The position information transmitting unit transmits information on the position acquired by the position information acquiring unit to a predetermined external device. Information relating to the operation of the radio base station apparatus in the vicinity of the position transmitted from the external predetermined apparatus in response to the information regarding the position being received by the external predetermined apparatus by the base station operation information receiving means Receive. Propagation loss detection means detects a propagation loss for a radio base station apparatus around the position of the radio relay amplification apparatus. The ranking means ranks the radio base station apparatus in the vicinity of the position of the radio relay amplifying apparatus based on the information received by the base station operation information receiving means and the propagation loss detected by the propagation loss detecting means. . Gain determining means determines the gain of the relay amplification with reference to the radio base station apparatus ranked as the best by the ranking means.

  Therefore, according to the position of the radio relay amplification apparatus, information on the operation of the radio base station apparatus around the position is acquired, and not only the propagation loss of the radio base station apparatus but also the information on the operation of the radio base station apparatus In consideration of the above, the radio base station apparatus used as a reference for relay amplification is determined. For example, the gain value for relay amplification is more effective than when the gain value for relay amplification is fixedly set. Can be set to

Here, as the position information acquisition means, for example, a GPS (Global Positioning System) function can be used.
In addition, as the information regarding the position, various kinds of information can be used. For example, information that can specify the position is used.
Various external devices may be used as the predetermined external device, for example, a higher-level device such as a network-side line control device to which a wireless base station device is connected can be used.

In addition, various types of information may be used as information regarding the operation of the radio base station apparatus. For example, various types of traffic information such as channel usage rate, uplink interference amount, and downlink total transmission power, congestion regulation, and construction regulation Various regulation information such as can be used.
Further, as information for specifying the wireless base station devices around the wireless relay amplification device, for example, information (peripheral station information) included in broadcast information wirelessly transmitted from the wireless base station device can be used.

  It should be noted that the extent to which “periphery” indicates may be arbitrarily determined in each system within a practically effective range, for example, as a specific example, in the periphery corresponding to each position. A mode in which a radio base station apparatus that is considered to exist is set in advance, or a radio base station apparatus that exists in an area inside a circle having a predetermined radius around the position of the target radio relay amplification apparatus It is possible to use a mode in which a radio base station device that receives a signal at a level at which reception processing can be performed at a target radio relay amplification device is considered to exist in the vicinity. is there.

  Further, as the propagation loss of the radio base station apparatus, for example, a value obtained by subtracting the reception level at the radio relay amplification apparatus from the transmission level at the radio base station apparatus can be used. In addition, the information regarding the transmission level in a radio base station apparatus is included in the alerting | reporting information radio-transmitted from the said radio base station apparatus, for example. Further, the reception level in the wireless relay amplification device is detected based on the received signal in the wireless relay amplification device.

  In addition, various methods may be used as a method for ranking a plurality of radio base station apparatuses. For example, the better value is greater in the traffic information included in the information related to the operation of each radio base station apparatus. The radio base station where the value of the result of summing these points is converted into points, and the propagation loss of each radio base station apparatus is converted into points so that the better one has a larger value. A technique for ranking station apparatuses as being best, or a technique for excluding restricted radio base station apparatuses based on restriction information can be used.

  Various techniques may be used for determining the gain of relay amplification with reference to a certain radio base station apparatus. For example, propagation loss, RSCP (Received Signal Code Power), Ec / Io ( The gain of relay amplification can be determined based on (received pilot power / all received power).

In the present invention, as a configuration example, the wireless relay amplification device has the following configuration.
That is, the relay amplification means performs the relay amplification. Another radio base station apparatus having a smaller propagation loss than the radio base station apparatus in which the cancellation target detection means is ranked best by the ranking means based on the detection result of the propagation loss detection means Is detected as a cancellation target. The downlink signal receiving means wirelessly receives a downlink signal from the radio base station apparatus to the mobile station apparatus. The canceling unit removes a predetermined signal from the radio base station apparatus detected as a cancellation target by the cancellation target detection unit from the downlink signal wirelessly received by the downlink signal receiving unit. The relay amplification unit amplifies the downlink signal from which the predetermined signal has been removed by the cancellation unit with the gain determined for downlink communication by the gain determination unit. Downlink signal transmission means wirelessly transmits the downlink signal amplified by the relay amplification means.

  Further, the uplink signal receiving means wirelessly receives an uplink signal from the mobile station apparatus to the radio base station apparatus. The relay amplifying unit amplifies the uplink signal wirelessly received by the uplink signal receiving unit with the gain determined for uplink communication by the gain determining unit. Uplink signal transmission means wirelessly transmits the uplink signal amplified by the relay amplification means.

Therefore, although it did not become a standard for determining the gain of relay amplification, a predetermined signal from another radio base station apparatus having a propagation loss smaller than that of the radio base station apparatus used as the standard is canceled from the received signal. Thus, the mobile station apparatus cannot make a call connection via the other radio base station apparatus, and the mobile station apparatus makes a call connection via the reference radio base station apparatus. be able to.
Here, for example, a pilot channel signal can be used as the predetermined signal to be canceled.

  As described above, according to the radio relay amplifying device according to the present invention, for example, the gain value of the relay amplification can be effectively set as compared with the case where the gain value of the relay amplification is fixedly set. Can do.

Embodiments according to the present invention will be described with reference to the drawings.
In this embodiment, the radio relay station has a radio base station apparatus, a mobile station apparatus, and a radio relay amplification apparatus, and the radio relay amplification apparatus amplifies a signal communicated between the radio base station apparatus and the mobile station apparatus. The amplification system will be described.

FIG. 1 shows a configuration example of a wireless relay amplification apparatus according to an embodiment of the present invention.
The wireless relay amplification device of this example is composed of a wireless relay amplification device body 1 and a wireless relay amplification device controller 2.
The radio relay amplifier main unit 1 includes a cancel control unit 11, a gain control unit 12, a base station filter unit 13, a mobile station filter unit 14, a cancel unit 15, a downlink amplification unit 16, and an uplink amplification. A portion 17 is provided.
The radio relay amplifier control unit 2 includes a first radio unit 21, an LCS measurement unit 22, a position information data generation unit 23, a baseband transmission / reception unit 24, a second radio unit 25, and a carrier level measurement unit. 26, a base station operation information acquisition unit 27, a quality measurement unit 28, a broadcast information analysis unit 29, a station list generation unit 30, and a main control unit 31.
Here, the radio relay amplifying device control unit 2 determines and controls the control gain of the radio relay amplifying device main unit 1. The radio relay amplifying device main unit 1 performs signal relay amplification using the gain value from the radio relay amplifying device control unit 2.

Next, the internal configuration of the wireless relay amplification device control unit 2 will be described.
The first radio unit 21 wirelessly receives a signal in the GPS (Global Positioning System) radio frequency band using an antenna, converts the signal into a baseband signal, and outputs the signal to the LCS measurement unit 22.
The LCS measurement unit 22 uses the GPS signal received by the first radio unit 21 to acquire the location information of the place where the wireless relay amplification device of this example is installed, and generates the location information as location information data To the unit 23.
The position information data generation unit 23 creates position information data from the position information acquired by the LCS measurement unit 22 and outputs the position information data to the baseband transmission / reception unit 24.

  The baseband transmission / reception unit 24 performs baseband reception processing of the signal converted into the baseband band, and a position (generated by the position information data generation unit 23) with respect to the network side via the second radio unit 25. A baseband transmission process for transmitting information data is performed. In addition, the baseband transmission / reception unit 24 outputs the reception signal input from the second radio unit 25 to the base station operation information acquisition unit 27, the quality measurement unit 28, and the broadcast information analysis unit 29, and the position information data generation unit 23 The signal to be transmitted including the position information data generated by the above is output to the second radio unit 25.

The second radio unit 25 transmits and receives signals communicated between the radio base station apparatus and the mobile station apparatus, and performs band conversion between the radio frequency band signal and the baseband signal. In addition, the second radio unit 25 outputs a signal wirelessly received by the antenna to the baseband transceiver unit 24 and the carrier level measurement unit 26, inputs a signal to be transmitted from the baseband transceiver unit 24, and wirelessly transmits the signal by the antenna. Send.
The carrier level measurement unit 26 measures the reception level of the entire radio frequency band in which the second radio unit 25 is set (communication between the radio base station device and the mobile station device), and The result information is output to the station list generation unit 30.

The base station operation information acquisition unit 27 transmits the data received from the baseband by the baseband transmission / reception unit 24, transmitted from the radio base station device, and around the installation location of the radio relay amplification device created on the network side The base station operation information is acquired and the base station operation information is output to the station list generation unit 30.
The quality measurement unit 28 measures the quality of the received signal from the signal subjected to the baseband reception processing by the baseband transmission / reception unit 24, and outputs the result information to the station list generation unit 30.
The broadcast information analysis unit 29 acquires and analyzes broadcast information transmitted from the radio base station apparatus among the data subjected to baseband reception processing by the baseband transmission / reception unit 24, and analyzes the information of the result as a station list generation unit 30. Output to.

The station list generation unit 30 calculates a propagation loss from the reception quality measured by the quality measurement unit 28 and the broadcast information analysis result obtained and analyzed by the broadcast information analysis unit 29, and uses the propagation loss as a reference. Create a list.
The station list generation unit 30 is subject to regulation from the broadcast information analysis result acquired and analyzed by the broadcast information analysis unit 29 and the base station operation information acquired by the base station operation information acquisition unit 27. A radio base station apparatus is detected, and a special station list is created in which the station is listed as a special station.
Further, the station list generation unit 30 points the information obtained from the base station operation information and the propagation loss, and creates a comprehensive station list based on the pointed base station operation information, the propagation loss, and the special station list information. .

The main control unit 31 can refer to various lists generated by the station list generation unit 30, and determines the gain of the radio relay amplification apparatus of this example by using the highest rank of the comprehensive station list as a master station. The gain information is controlled to notify the gain controller 12 of the radio relay amplifying device main unit 1 and a station located higher than the parent station in the station list based on the propagation loss is determined. The radio parameter (cancellation station information) of the station is notified to the cancel control unit 11 of the radio relay amplifying apparatus main body 1 and controlled.
The main control unit 31 has a function of performing various other controls (for example, control of each processing unit).

Next, the internal configuration of the wireless relay amplification apparatus main body 1 will be described.
The cancel control unit 11 performs control for the cancel unit 15 to remove the pilot channel signal of the station notified from the radio relay amplification device control unit 2.
The gain control unit 12 controls the gain of the downlink amplification unit 16 and the gain of the uplink amplification unit 17 based on the gain value notified from the radio relay amplification device control unit 2.

The base station filter unit 13 limits and separates the input / output radio signal on the base station antenna side. Specifically, the downlink signal wirelessly received from the radio base station apparatus is processed by an antenna (not shown) on the base station side and output to the cancel unit 15, and the uplink signal input from the uplink amplification unit 17 is processed. The data is processed and output to an antenna (not shown) on the side of the base station and wirelessly transmitted.
The mobile station filter unit 14 limits and separates the input / output radio signal on the mobile station antenna side. Specifically, an uplink signal wirelessly received from the mobile station apparatus is processed by an antenna (not shown) on the mobile station side and output to the uplink amplifying unit 17, and the downlink signal input from the downlink amplifying unit 16 is output. The data is processed and output to an antenna (not shown) on the mobile station side and transmitted wirelessly.

The cancel unit 15 controls the pilot channel of the station positioned higher than the parent station in the station list based on the propagation loss by the control from the cancel control unit 11 for the downlink signal input from the base station filter unit 13. And the resultant signal is output to the downstream amplification unit 16.
The downlink amplifying unit 16 receives a downlink signal input from the cancel unit 15 (from the downlink signal from the radio base station apparatus to the mobile station apparatus, by the cancel unit 15, higher than the parent station in the station list based on the propagation loss. The signal obtained by removing the pilot channel signal of the station located at () is amplified by the gain value set by the gain control unit 12, and the resulting signal is output to the mobile station filter unit 14.
The uplink amplification unit 17 amplifies the uplink signal (uplink signal from the mobile station apparatus to the radio base station apparatus) input from the mobile station filter unit 14 by the gain value set by the gain control unit 12, and the result Is output to the base station filter unit 13.

Next, with reference to FIG. 2 and FIG. 3, the operation of the wireless relay amplifying apparatus of this example and its control method will be described.
2 and 3 show examples of flowcharts relating to the control of the wireless relay amplification device of this example.
First, using the GPS signal converted into the baseband band by the first radio unit 21, the LCS measurement unit 22 measures the position of the installation location of the radio relay amplification device of this example (step ST_A1). LCS is a position information acquisition method proposed by 3GPP (3rd Generation Partnership Project).
Based on the measurement result in the LCS measurement unit 22, position information data is generated by the position information data generation unit 23, the generated position information data is subjected to baseband transmission processing by the baseband transmission / reception unit 24, and the second radio unit 25. Is transmitted to the radio base station apparatus (network side) (step ST_A2).

Next, the broadcast information transmitted from the radio base station apparatus is received by the second radio unit 25 and the baseband transmission / reception unit 24, and the received broadcast information is analyzed by the broadcast information analysis unit 29, and within the broadcast information The transmitted peripheral station information (list of peripheral stations) is acquired (step ST_A3).
The second radio unit 25 and the baseband transmitting / receiving unit 24 sequentially receive the perch channels of the stations listed as peripheral stations in the acquired peripheral station information, and the carrier level measuring unit 26 and the quality measuring unit 28 use the carrier. Radio information for each radio base station apparatus such as a level (eg, RSSI) and reception quality (eg, RSCP and Ec / Io) is obtained (step ST_A4).
A propagation loss is calculated from the peripheral station information and the reception quality, and a propagation loss reference list is created by the station list generation unit 30 (step ST_A5).

Here, Received Signal Strength Indicator (RSSI) represents received signal strength.
RSCP (Received Signal Code Power) represents the desired wave received power.
Ec / Io represents (pilot received power / all received power).

FIG. 4 shows an example of the propagation loss criterion list. The list in this example is an example in a W-CDMA (Wideband-Code Division Multiple Access) system.
In the propagation loss criterion list of this example, the serial number (No.), the code number (base station specific code) obtained at the time of detection, and the notification of the radio base station apparatus that could actually be detected by the processing of (Step ST_A5) Base station transmission power obtained from information, reception level obtained from quality measurement results, propagation loss obtained from the equation (propagation loss = base station transmission power-reception level), frequency number obtained from broadcast information, obtained at the time of detection The base station timings and station identification information to be associated with each other are listed. Further, the plurality of radio base station apparatuses are arranged in the order of propagation loss (in order from the smallest propagation loss to the largest propagation loss).

  On the other hand, on the network side, the installation location (installation position) of the wireless relay amplification device (booster) of this example is specified using the location information data sent to the network side in the process of (step ST_A2) (step ST_B1). ), Confirms the installation status of the radio base station device around the specified installation position, and transmits the current operation status information (base station operation information) of the radio base station device to the radio relay amplification device side of this example (Step ST_B2).

  Here, as information (base station operation information) indicating the operation state of the radio base station apparatus, for example, the channel usage rate in the radio base station apparatus, the amount of uplink interference, the direction from the radio base station apparatus to the mobile station apparatus There is information such as downlink power usage rate. Each is a value indicating the amount of traffic in the radio base station apparatus, that is, it can be used as an index for estimating the degree of communication congestion. In addition, as information indicating the operation state of the radio base station device (base station operation information), further information on the carrier frequency used in the radio base station device, information such as being a regulatory station under construction, Individual special information determined in advance by the system, such as information indicating that the station is under congestion regulation, can also be used.

The base station operation information transmitted from the network side is received by the second radio unit 25 and the baseband transmission / reception unit 24, and this information is acquired by the base station operation information acquisition unit 27 (step ST_A6).
The station list generation unit 30 detects a station in a congested state or a station under construction regulation from the acquired base station operation information, and creates a list of special stations (step ST_A7).

FIG. 5 shows an example of the special station list.
In the special station list of this example, a station number indicating a serial number (No.), a special station code number (base station specific code), a frequency (for example, a frequency number), a congestion regulation, a construction regulation, etc. Are associated and listed.

Also, pay attention to traffic information from the acquired base station operation information. The traffic information can be used as an index for estimating the degree of communication congestion.
For example, as a method for determining a station (parent station) as a reference for a signal to be amplified by the radio relay amplification apparatus, a station having the smallest propagation loss is set as a parent station, and the gain value is adjusted based on the propagation loss. Although it is possible, in this case, even if gain adjustment is performed based on a station under construction regulation or congestion regulation, it is considered that it does not contribute to effective expansion of the communication area.
Therefore, in this example, traffic information is used to determine the master station so that the communication efficiency is effectively improved at the installation location. For example, a channel usage rate, an uplink interference amount, and a downlink total transmission power are considered as traffic information.

Here, the channel usage rate indicates the usage rate of the communication channel in the radio base station device, and if the usage rate is high, it is assumed that there is a considerable amount of calls communicating through the radio base station device. Conceivable. Therefore, in order to actually perform communication through the radio base station apparatus, it is necessary to limit the transmission speed to be low. For this reason, when considering communication efficiency, it is conceivable that a station with a low channel usage rate is set as a master station.
Further, the uplink interference amount can be the power value in the band received on the radio base station apparatus side, but when this interference amount is large, a lot of movements are under control of the radio base station apparatus. It is considered that the station device is accommodated. Also in this case, in order to perform communication via the radio base station apparatus, it is necessary to limit the transmission speed to be low.
The total downlink transmission power indicates how much power is currently used among the powers that can be transmitted by the radio base station apparatus. When the total downlink transmission power is large, there is a mobile station apparatus that performs high-speed communication that requires a large amount of power for communication, or a mobile station that is communicating at the cell boundary of the radio base station apparatus. A state where there is a station device is conceivable. In any case, when there is not much power for a new call, in order to perform communication via the radio base station apparatus, it is necessary to limit the transmission rate to be low.

  Considering the above, not only the propagation loss but also the traffic information is an element for determining the master station. Since each unit is different, points are made according to each value. Further, for the reasons described above, in order not to make a special station a parent station, the special station is excluded, traffic information and propagation loss are pointed, and the station list generation unit 30 creates a comprehensive station list ( Step ST_A8).

FIG. 6 shows an example of the comprehensive station list.
In the general station list of this example, the serial number (No.), base station specific code, frequency (for example, frequency number), propagation loss point, channel usage rate point, uplink interference amount point, downlink total transmission power point A total point that is the sum of these points and information indicating the master station are associated and listed.
Further, a plurality of radio base station apparatuses are listed in order from the largest overall point to the smallest total point. And the radio base station apparatus with the largest (topmost) total point is set as the master station.

Here, the point of propagation loss decreases as the propagation loss increases. The point of the channel usage rate decreases as the channel usage rate increases. The point of the amount of uplink interference decreases as the amount of uplink interference increases. The point of the total downlink transmission power decreases as the downlink total transmission power increases.
The correspondence between the propagation loss, the channel usage rate, the uplink interference amount, the downlink total transmission power, and the points is set in advance, for example, and various correspondences may be used.

As described above, the main control unit 31 identifies the highest station in the comprehensive station list (in this example, the base station unique code is “152”) as the master station (step ST_A9).
Next, based on the radio information of the radio base station apparatus as the master station, that is, propagation loss, RSCP, Ec / Io, etc., the main controller 13 determines the gain value of the radio relay amplification apparatus of this example (step ST_A10 ).

However, if the determined gain value is used to amplify the signal as it is by the configuration of the wireless relay amplifying apparatus as in the prior art, for example, the signal of the station excluded in the process of (Step ST_A8) is also amplified as it is. Become. In this case, as a result, the mobile station apparatus that receives the amplified signal, for example, the station having the code number (base station unique code) shown in FIG. ) Is determined to be a station suitable for communication.
However, the station with the code number “331” or the station with the code number “280” is a regulated station (see FIG. 5) or a station with a high channel usage rate (see FIG. 6). Therefore, when considering the wireless relay amplification apparatus as a reference, it is not always appropriate to expand the area in a state where the station with the code number “331” or the station with the code number “280” can be selected at the installation location. is not.

Therefore, in this example, the mobile station apparatus cannot select the station with the code number “331” or the station with the code number “280”. Specifically, the signals of the stations higher than the parent station in the propagation loss reference list (in this example, the station with the base station specific code “331” and the station with “280” are the cancellation target stations) Cancel and then amplify.
The main control unit 31 instructs the cancel control unit 11 of the radio relay amplifying apparatus main unit 1 to cancel the pilot channel of the cancel target station (step ST_A11).

Here, an example of a known technique will be described as a signal cancellation method with reference to FIG.
FIG. 7 shows a configuration example of the cancel unit 15.
The cancel unit 15 of this example includes a radio demodulation unit 41, a delay unit 42, a plurality of n path estimation units 43-1 to 43-n, an addition unit 44, a filter unit 45, and a subtraction unit 46. And a wireless modulation unit 47.
Each of the path estimation units 43-1 to 43-n includes a despreading unit 51, a channel estimation unit 52, a multiplication unit 53, and a spreading unit 54, respectively.

The radio demodulator 41 converts a radio frequency band signal (input from the base station filter unit 13) into a baseband signal, and the delay unit 42 and each of the path estimators 43-1 to 43-n Output to the despreading unit 51.
The delay unit 42 digitally converts the baseband signal input from the radio demodulation unit 41, delays the signal by a predetermined time, and outputs the result to the subtraction unit 46.

Each path estimation unit 43-1 to 43-n estimates a path transmission path from the radio base station apparatus to be canceled, and outputs a signal representing the result to the addition unit 44.
The adding unit 44 combines the estimation results of the paths by the path estimation units 43-1 to 43-n, and outputs the combined result to the filter unit 45 as a cancellation pilot channel signal replica.
The filter unit 45 limits the band of the pilot channel signal replica input from the adder unit 44 and outputs the resultant signal to the subtractor unit 46.

The subtracting unit 46 cancels the pilot channel of the cancellation target station by subtracting the pilot channel signal replica input from the filter unit 45 from the baseband signal delayed by a predetermined time input from the delay unit 42, The subtraction result signal is output to the wireless modulation unit 47.
The wireless modulation unit 47 converts the signal (baseband signal after cancellation) input from the subtraction unit 46 into a signal in the radio frequency band and outputs the signal to the downlink amplification unit 16.

Next, the operation of the cancel unit 15 will be described in detail.
Here, a W-CDMA system is taken as an example. In this case, the symbol pattern of the pilot channel is defined in the system and is a known pattern. That is, since the pilot channel pattern in FIG. 7 is known, if the code number and path timing can be detected, each path estimation unit 43-1 to 43-n generates a transmission path estimation and a signal replica. Is possible. The code number and path timing can be supplied as radio parameters from the main control unit 31 of the radio relay amplification device control unit 2 via the cancel control unit 11 of the radio relay amplification device body unit 1. .

The signal converted into the baseband band (by the radio demodulation unit 41) is despread by the despreading unit 51 with the supplied code number and path timing, and then by the channel estimation unit 52 using a known pilot channel pattern. Perform channel estimation. The multiplication unit 53 multiplies the vector amount determined as the estimated value and the pilot channel pattern, thereby generating a pilot channel symbol replica.
The symbol replica is spread by the spreader 54 to generate a pilot channel signal replica of the corresponding path.
A pilot channel signal replica for each path is synthesized by the adding unit 44, and the band limit is applied to the synthesized result by the filter unit 45, so that the pilot channel signal replica of the cancellation target station (for all paths) is obtained. Created.

  Then, the pilot channel component of the cancel target station can be canceled by subtracting the created pilot channel signal replica of the cancel target station from the original signal by the subtracting unit 46. Such a canceled signal is converted into a radio frequency band signal by the radio modulation unit 47.

In this way, the pilot channel of the cancel target station can be canceled. The wireless relay amplifying device uses the gain value determined based on the cancel station information from the main control unit 31 of the radio relay amplifier control unit 2, that is, the radio parameters such as the cancel station code and the cancel station timing, and the radio information of the master station. Set in the main unit 1 to control relay amplification.
Further, such a canceling operation itself continues constantly and operates so that each information is updated at the timing of control.
The operation of the radio relay amplifying apparatus main body 1 is similar to that of the main part of the radio relay amplifying apparatus in the prior art (for example, as shown in FIG. 8) except for the cancel operation. be able to.

With reference to FIG. 3, processing such as gain update will be described.
The main control unit 11 monitors “base station operation information update timing”, “propagation loss reference list update timing”, and “gain value update timing”.
When the “base station operation information update timing” has arrived (step S1), (step ST_A1) processing, (step ST_A2) processing, (step ST_B1) processing, (step ST_B2) processing, (step ST_A6) ) Process (step ST_A7) and process (step ST_A8) are executed, and the base station operation information is updated and reflected in the comprehensive station list.

When the “propagation loss reference list update timing” has arrived (step S2), the processing of (step ST_A3), the processing of (step ST_A4), the processing of (step ST_A5), and the processing of (step ST_A8) are executed. Update the propagation loss reference list and reflect it in the general station list.
When the “gain value update timing” has arrived (step S3), the processing of (step ST_A9), the processing of (step ST_A10), and the processing of (step ST_A11) are executed, and control of the radio relay amplifying device main unit 1 is performed. I do.

  In the mobile station apparatus located in the area expanded by the output from the wireless relay amplification apparatus by the operation as in this example, for example, the base station unique code shown in FIG. 4 is “331” or “280”. Since the pilot channel cannot be detected for a station, call connection via the radio base station apparatus cannot be performed, and a station (master station) whose base station unique code shown in FIG. Call connection is made via The station whose base station unique code shown in FIG. 4 is “152” is a radio base station apparatus that is determined as a master station in consideration of not only the propagation loss but also the traffic volume. Is considered suitable for the radio base station apparatus area to be expanded.

As described above, in this example, in the wireless relay amplification system in which the wireless relay amplification device relays and amplifies a signal communicated between the wireless base station device and the mobile station device,
A function of receiving a signal in the radio frequency band of GPS and converting it into a baseband signal (first radio unit 21);
A function (LCS measurement unit 22) for acquiring position information of a place where the wireless relay amplification device is installed using the received GPS signal;
A function of creating position information data from the acquired position information (position information data generation unit 23);
A function (second radio unit 25) for transmitting and receiving signals communicated between the radio base station apparatus and the mobile station apparatus and performing band conversion between a radio frequency band signal and a baseband signal;
A function of measuring the carrier level of the radio frequency band communicated between the radio base station apparatus and the mobile station apparatus (carrier level measurement unit 26);
Baseband reception processing of the signal converted into the baseband by the transmission / reception band conversion function (second radio unit 25) and the position described above for the transmission / reception band conversion function (second radio unit 25) A function (baseband transmission / reception unit 24) for performing baseband transmission processing for transmitting information data;
A function of measuring the quality of the received signal using the baseband received signal (quality measuring unit 28);
A function (broadcast information analysis unit 29) for acquiring and analyzing broadcast information transmitted from the radio base station apparatus among the data subjected to baseband reception processing;
A function (base station operation information acquisition unit 27) that acquires base station operation information around the installation location of the wireless relay amplification device created on the network side, transmitted from the radio base station device, among the data subjected to baseband reception processing )When,
A function (station list generation unit 30) that calculates a propagation loss from the measured reception quality and the analysis result of broadcast information and creates a station list (propagation loss reference list) based on the propagation loss;
A function to create a list (special station list) that detects radio base station devices that are subject to restrictions from the analysis results of broadcast information and base station operation information and lists the stations as special stations (special station list) Part 30),
A function (station list generation unit 30) for converting information obtained from base station operation information and propagation loss into points,
A function (station list generation unit 30) for creating a comprehensive station list based on the base station operation information and propagation loss that have been made into points, and information on the special station list;
A function (main control unit 31) for determining the gain of the wireless relay amplification device with the highest rank of the comprehensive station list as a master station;
A function (main control unit 31, cancel control unit 11 and cancel unit 15) for removing a pilot channel signal of a station located higher than the parent station in a station list based on propagation loss (propagation loss reference list);
A function (a gain control unit 12 or a downlink amplification unit 16) that amplifies a signal obtained by removing a pilot channel of a station located above the parent station from a downlink signal from the radio base station device to the mobile station device, using the determined gain value. )When,
A function of amplifying an uplink signal from the mobile station device to the radio base station device with the determined gain value (gain control unit 12 or uplink amplification unit 17);
A wireless relay amplifying device and a control method thereof are realized.

  Therefore, in the radio relay amplifying apparatus and its control method of this example, for example, the operation of the radio base station apparatus to the service area is performed because the operation with a fixed gain, which is a drawback of the radio relay amplifying apparatus in the prior art, is performed. The problem that the gain value does not match the actual condition due to addition, movement, change of transmission power, etc., and the necessity of readjustment or resetting can be solved. The gain value can be readjusted autonomously in accordance with the environmental change at the place where is installed. Also, in this example, the installation location of the wireless relay amplification device is specified using LCS, the operation information of the wireless base station device around the installation location is transmitted from the network side to the wireless relay amplification device, and the base station operation information To determine the gain value of the wireless relay amplifying device by determining the master station so that the communication efficiency is effectively improved at the location where the wireless relay amplifying device is installed. Is possible.

  Here, various configurations may be used on the network side. For example, a higher-level device such as a line control device directly or indirectly connected to one or more radio base station devices is used. The higher-level device can store and manage information related to the operating state of the subordinate (connected) radio base station device in a memory, via the radio base station device subordinate from the radio relay amplification device. According to the received position information data, information on the operation state of the radio base station apparatus around the position can be transmitted to the radio relay amplification apparatus via the radio base station apparatus under its control.

In the wireless relay amplification device of this example, the position information acquisition unit is configured by the functions of the first wireless unit 21 and the LCS measurement unit 22, and the position information data generation unit 23, the baseband transmission / reception unit 24, and the second The location information transmission means is configured by the function of the radio unit 25, and the base station operation information reception unit is configured by the functions of the second radio unit 25, the baseband transmission / reception unit 24, and the base station operation information acquisition unit 27. The propagation loss detection means is configured by the functions of the second radio unit 25, the carrier level measurement unit 26, the baseband transmission / reception unit 24, the quality measurement unit 28, the broadcast information analysis unit 29, and the station list generation unit 30. The function of the station list generation unit 30 constitutes ranking means, and the function of the main control unit 31 constitutes gain determination means.
Further, in the wireless relay amplification device of this example, the downlink signal receiving means is configured by the function of the antenna of the base station, the cancel target detecting means is configured by the function of the main control unit 31, and the cancel control unit 11 The cancel unit is configured by the function of the cancel unit 15, the relay amplification unit of the downlink signal is configured by the function of the downlink amplifying unit 16, and the downlink signal transmission unit is configured by the function of the antenna of the mobile station. The uplink signal receiving means is constituted by the function of the antenna of the mobile station, the relay amplification means of the uplink signal is constituted by the function of the uplink amplifying unit 17, and the uplink signal is transmitted by the function of the antenna of the base station. Means are configured.

Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various systems and devices.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of the radio relay amplifying apparatus which concerns on one Example of this invention. It is a figure which shows an example of the control flow of a radio relay amplification apparatus. It is a figure which shows an example of the control flow of a radio relay amplification apparatus. It is a figure which shows an example of a propagation loss reference | standard list. It is a figure which shows an example of a special station list. It is a figure which shows an example of a comprehensive station list. It is a figure which shows the structural example of a cancellation part. It is a figure which shows the structural example of a radio relay amplification apparatus.

Explanation of symbols

  1 ·················································· wireless repeater amplifier control unit, 11 ·· cancel control unit, 12, 61 ·· gain control unit .. Mobile station filter unit, 15 .. Cancellation unit, 16, 64 .. Downlink amplification unit, 17, 65 .. Uplink amplification unit, 21, 25 .. Radio unit, 22 .. LCS measurement unit, 23. Location information data generation unit, 24 .. Baseband transmission / reception unit, 26 .. Carrier level measurement unit, 27 .. Base station operation information acquisition unit, 28 .. Quality measurement unit, 29 .. Broadcast information analysis unit, 30. Station list generation unit 31... Main control unit 41.. Radio demodulation unit 42.. Delay unit 43-1 to 43-n Path estimation unit 44... Addition unit 45. 46 .. Subtraction part, 47. Radio modulator, 51 ... inverse spreading portion, 52 ... channel estimation unit, 53 ... multiplying unit, 54 ... spreading unit,

Claims (1)

In a radio relay amplification device that relays and amplifies signals communicated between a radio base station device and a mobile station device,
Position information acquisition means for acquiring information related to the position of the wireless relay amplification device;
Position information transmitting means for transmitting information related to the position acquired by the position information acquiring means to a predetermined external device;
Base station operation information reception for receiving information on operation of radio base station devices around the position transmitted from the external predetermined device in response to reception of information on the location by the external predetermined device Means,
Propagation loss detection means for detecting a propagation loss for a wireless base station device around the position of the wireless relay amplification device;
Ranking means for ranking the radio base station devices around the position of the radio relay amplification device based on the information received by the base station operation information receiving means and the propagation loss detected by the propagation loss detection means;
Gain determining means for determining a gain of the relay amplification with reference to a radio base station apparatus ranked best by the ranking means;
A wireless relay amplifying device comprising:

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