JP2010273318A - Device and method for controlling repeater using system identification information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for controlling a repeater which selects a relaying service band by using system identification information of a downward signal. <P>SOLUTION: This device for controlling a repeater includes: respective duplexer sections 10, 15 on a base station side and a terminal side; a downward repeating means constituted of a downward signal reception section 51 performing signal processing for relaying a signal received from a base station 1 to a terminal 5, a downward repeating band selection section 53, a downward signal transmission section 55 and a downward power amplifier 57; a search band selection section 20 for acquiring base station information from a received downward signal; a system information acquisition section 30 for acquiring system information for a selected band; a repeating band determination section 40 for selecting a band to be repeated to generate an appropriate control signal; and an upward repeating means constituted of an upward signal reception section 61 for processing an upward signal received from a subscriber terminal 5, an upward repeating band selection section 63, an upward signal transmission section 65 and an upward power amplifier 67. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a repeater control apparatus and method using identification information of a wireless communication system received from a base station, and more specifically, when a provider providing a relay target signal is changed or a relay target The present invention relates to a repeater control method for automatically changing and limiting a transmission band when a frequency is changed, and a repeater device using the same.

In general, the relay devices used to eliminate shadow areas in the wireless communication service area have been purchased, installed, and managed by operators, but some indoor small devices that do not require permission from the wireless station. Since the output repeater can be purchased and installed directly by a general user, the spread of the output repeater is widespread due to its convenience and economy.

Radio frequency spectrum such as mobile communication and broadcasting is usually a resource managed by the state, and a part of the service is acquired by a service provider who has acquired a business right for the frequency for a predetermined period. The usage or right holder may be changed depending on the frequency reorganization plan such as use and return, or switching the existing TV broadcast frequency to mobile communication.

Furthermore, with respect to existing base stations that use the corresponding frequency band, the same operator may evolve part or all of the band to a new communication standard, or change to a new form of base station, etc. For example, when evolving from CDMA (Code-Division Multiple Aaccess) to LTE (Long-Term Evolution) or diverting a part of the band of an outdoor base station to a femtocell base station Is mentioned.

In Patent Document 1, it is determined from the so-called area information received from the base station whether the corresponding repeater is in the area to be serviced or outside the area, and if it is outside the service area, It is configured to block operation. In addition, using the area information received from the GPS (Global Positioning System), when the repeater is outside the service area, the relay function is cut off.

However, in a mobile communication system, a service band is divided into one or more bands and a multicarrier is used, so that a subscriber is restricted to use only one of the divided bands. Frequency allocation method (Frequency Allocation) is used. When starting the evolution of communication standards, most of the divided carriers are applied from some of the divided carriers in order to support existing terminals.

If a small base station such as a femtocell base station is used instead of a repeater to eliminate the shadow, a part of the carrier band of the entire service band is transferred to the femtocell. Are often in service. In this case, the repeater does not relay a band that uses a communication standard that does not match the characteristics of the repeater, but selects a new band that can be relayed or avoids the frequency band that the femtocell uses. In some cases, it is necessary to selectively relay only the necessary bandwidth.

As an example, a provider using CDMA has installed a repeater for CDMA, but when a part of the same band is evolved to the LTE standard, the characteristics required by the existing CDMA standard, Support may not be possible due to differences from characteristics required by the LTE standard. If the repeater operates in an area where the femtocell base station is installed and operated, there may be a case where the transmission signal interferes with other femtocells or outdoor base stations to reduce the quality of the call. In addition, there is a case where the entire right or part of the corresponding frequency band is changed, and part or all of the operation band of the repeater that has been used must be cut off.

The conventional relay technology maintains or interrupts the operation of the repeater according to the area in which the repeater operates. Therefore, selective control by the frequency band or carrier wave of the signal to be relayed is not possible, and the use efficiency and effect of the repeater are not possible. And there is a problem of lowering the economy. In addition, when the operation of the repeater is interrupted, there is a problem in that power is consumed and noise is transmitted even when there is no signal by using a method of cutting off the signal path of the power amplifier.

Accordingly, the inventor of the present invention is a system in which the conventional relay technique simply blocks the input signal path of the amplifier and blocks the entire input signal without band division, but separates the band of the input signal for each carrier wave. The present inventors have devised a means capable of blocking only a carrier wave that needs to be cut off, and have come up with a method of stopping the operation of a power amplifier that consumes a large amount of power without blocking a signal when the whole carrier wave is cut off.

Japanese Patent Publication No. 2008-301086 (Radio Relay Device and Radio Relay Device Control Method)

The present invention has been made in view of the circumstances as described above, and is automatically performed when the operator who uses the repeater is changed using the system identification information or when the relay target frequency is changed. An object of the present invention is to provide a repeater control method capable of limiting the transmission band and a repeater device using the same.

In order to achieve the above object, the present invention provides a base station-side and terminal-side duplexer units 10 and 15, and a downward signal that performs signal processing to relay a signal received from the base station 1 to the terminal 5. The receiving unit 51, the downward relay band selection unit 53, the downward signal transmission unit 55, and the downward power amplifier 57, and the search band selection unit 20 that acquires the base station information from the received downward signal are selected. System information acquisition unit 30 that acquires system information for a band, relay band determination unit 40 that selects a band to be relayed and generates an appropriate control signal, and processes an upward signal received from the subscriber terminal 5 An upward signal reception unit 61, an upward relay band selection unit 63, an upward signal transmission unit 65, and an upward power amplifier 67. And

Another specific feature of the present invention is that each of the duplexer units 10 and 15 on the base station side and the terminal side, and a downward signal that performs signal processing to relay the signal received from the base station 1 to the terminal 5 Search band selection comprising a frequency converter 97 and a bandpass filter 98 so as to obtain base station information from the received downward signal and a downward relay means comprising a reception unit 51, a downward signal transmission unit 55 and a downward power amplifier 57 Unit 20, system information acquisition unit 30 including frequency despreader 31, demultiplexer 32, decoder 33, and system information extractor 34 so as to acquire system information for the selected band, and relay A system identification information database 41, a comparator 42, a relay band determiner 43, a reference time generator 44 and a carrier so as to select a band to be generated and generate an appropriate control signal A relay band determining unit 40 including a wave search controller 45; an upward signal receiving unit 61 for processing an upward signal received from the subscriber terminal 5; an upward relay means including an upward signal transmitting unit 65 and an upward power amplifier 67; It is to provide.

The relay control method of the present invention includes a duplexer unit on each of a base station side and a terminal side, a downward signal receiving unit that performs signal processing to relay a signal received from the base station to the terminal, and a downward relay band selecting unit A downward relay means comprising a downward signal transmission unit and a downward power amplifier, a search band selection unit for acquiring base station information from the received downward signal, a system information acquisition unit and a relay band determination unit, and received from a subscriber terminal An upward signal receiving unit for processing an upward signal, an upward relay band selection unit, an upward signal transmission unit, and an upward relay means including an upward power amplifier.When power is applied, all upward and downward carrier waves The relay power is cut off, the carrier band to be searched is determined, and the search target carrier band for controlling the frequency conversion is selected accordingly. A system information acquisition step for decoding and extracting system information carried on the selected carrier wave, a system list update step for creating and managing a system list in the system information acquisition unit, and a base detected further If there is no station, the acquisition of system information about the carrier wave is terminated, and if there are more base stations to be detected, the step of acquiring system information about other base stations and the strongest signal from the system list are continued. Selecting system information of a signal having the following strength, determining whether the system information selected in the updating step is a relay target signal, and determining whether the system information is not a relay target signal. Control the relay band selection unit to interrupt the relay of the carrier wave, and if it is a relay target signal, continue relaying Selecting a search target carrier in, characterized in that it comprises the steps of: were infinitely repeated until control step from the system information acquisition step.

ADVANTAGE OF THE INVENTION According to this invention, the repeater control apparatus which selects the service zone | band to relay using the system identification information of a downward signal, and its method are realizable. In addition, the present invention can implement a repeater control apparatus and method for maintaining or canceling relaying by maintaining or canceling the operation of the power amplifying elements of the upward and downward power amplifiers based on the system information.

It is a block diagram for demonstrating the repeater control apparatus using the frequency identification information which concerns on 1st Embodiment of this invention, and its method. 3 is a detailed diagram illustrating a band selection unit capable of changing a bandwidth and a center frequency of each carrier according to the first embodiment of the present invention. 6 is a diagram illustrating a band selection unit using digital signal processing according to a second embodiment of the present invention. It is a block diagram which shows a search band selection part in detail. It is a block diagram which shows a system information acquisition part in detail. It is a block diagram which shows a relay band determination part in detail. It is a block diagram for demonstrating the repeater control apparatus using the frequency identification information which concerns on 2nd Embodiment of this invention, and its method. It is a flowchart which shows a relay zone selection algorithm. It is drawing which shows another example of the band selection part using N band filters. It is drawing which shows the example of the multicarrier band by which an operation form is changed according to an operation period. It is drawing which shows the example from which an operation band moves according to an operation period.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram for explaining a repeater control apparatus using frequency identification information and a method thereof according to a first embodiment of the present invention.
The present invention relates to duplexers 10 and 15 on the base station side and the terminal side, a downward signal receiver 51 that performs signal processing to relay a signal received from the base station 1 to the terminal 5, and a downward relay band. Downward relay means including a selection unit 53, a downward signal transmission unit 55, and a downward power amplifier 57, a search band selection unit 20, a system information acquisition unit 30, and a relay band determination unit 40 that acquire base station information from the received downward signal And an upward signal reception unit 61 for processing an upward signal received from the subscriber terminal 5, an upward relay band selection unit 63, an upward signal transmission unit 65, and an upward power amplifier 67.

That is, a downward signal receiving unit 51 and an upward power amplifier 67 are connected to the duplexer unit 10 on the base station side, and an upward signal receiving unit 61 and a downward power amplifier 57 are connected to the duplexer unit 15 on the terminal side. Has been. A search band selecting unit 20 is connected between the downward signal receiving unit 51 and the downward power amplifier 53, and the relay band determining unit 40 includes upward / downward relay band selecting units 53 and 63, a search band selecting unit 20 and Upward / downward power amplifiers 57 and 67 are connected.

In the frequency division duplex system, the duplexer unit 10 on the base station side performs the role of separating using the difference between the frequency band of the signal received from the base station 1 and the signal frequency band transmitted to the base station 1. In the time division duplex system, the reception signal and the transmission signal are separated according to the time allocated to each of the reception signal and the transmission signal. Therefore, the signal received from the base station 1 is transmitted to the downward signal receiving unit 51, and the output of the upward power amplifier 67 is sent to the base station 1 via the antenna.

The downward signal receiving unit 51 of the downward relay means removes RF band noise such as other band signals using a bandpass filter, and appropriately amplifies the signal received by a low noise amplifier or the like. If necessary, it is also possible to provide an IF signal processor that transitions this signal to the IF frequency and refilters it.

As shown in FIG. 1, the downward relay band selection unit 53 includes one or more band filters and a signal processing unit having the same function as the entire band filter. A service band can be divided to suppress or pass a signal in a part of the band. As a result, the selected band is output to the downward signal transmission unit 55.

As shown in FIG. 1, the relay band selection unit can be composed of N band filters corresponding to N carriers to be relayed, and a switch that can cut off or connect the output. . However, in order to reduce the complexity of the system, as shown in FIG. 2, for N carriers, M band-pass filters 81 to 83 and switches 84 to 86, etc., which are fewer than N are configured. You can also.

FIG. 2 is a detailed diagram illustrating a band selection unit capable of changing the bandwidth and center frequency of each carrier according to the first embodiment of the present invention, wherein the output of the downward / upward receiving unit is variable band filtering. The relay band signal selected via the switches 81 to 83 and the switches 84 to 86 is generated by the upward band selection signal by the filter band controller 88 and the connection controller 87. Select.

In this case, the relay band determining unit 40 has an algorithm that can use the bandpass filter as an optimum combination. In addition, it is possible to optimally control the pass band width through the relay band determining unit 40 and the band pass filter controller using M band pass filters in which the bandwidths of the respective band pass filters are adjusted.

Preferably, as shown in FIG. 3, an AD (Analog-to-Digital) converter 91, a programmable digital filter 92, a DA (Digital-to-Analog) converter 93, a clock generation and control logic 95, and a filter coefficient A digital signal processor consisting of generator 94 can also be used.

FIG. 3 is a diagram showing a band selection unit using digital signal processing according to the second embodiment of the present invention, in which a downward / upward reception unit output is supplied to an AD converter 91 while a DA converter 93 is provided. The selected relay band signal is output through the filter coefficient generator 94 to which the upward relay band selection control signal is supplied, and the programmable digital filter 92 is controlled. The digital filter 92 can be relatively freely selected from the bandwidth, the number of carrier bands, and the band pass characteristics by changing the filter coefficient.
In particular, in a repeater that implements a digital interference cancellation signal processing function, etc., by using such digital signal processing, it is economical to use a part or all of the resources in common with the interference signal processor. In addition, the relay band can be selected effectively.
In the downward relay means shown in FIG. 1, the downward signal transmission unit 55 further amplifies the selected relay band signal, and when the downward signal reception unit 51 transits to the IF band, it transits again to the RF band. Perform a role. Therefore, the downward signal transmission unit 55 drives the downward power amplifier 57.

The downward power amplifying unit 57 amplifies the RF (Radio Frequency) band signal to a predetermined level of power so as to be transmitted to the terminal side via the antenna.
The search band selection unit 20 uses multiple carrier waves for base station signals such as WCDMA (Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access) 2000 1x, and CDMA2000 1x EV-DO (Evolution Data Only). When each carrier is operated independently, system information is sent out for each carrier. In this case, the communication standard may be evolved for each carrier, or a part of the carrier may be allocated to a new base station such as a femtocell. At this time, since it is necessary to limit relaying according to communication standards or base station characteristics, it is necessary to search system information for each of these in order to determine whether or not it is a band to be relayed.

In order to perform such a role, the search band selection unit 20 includes a frequency converter 97 and a band filter 98 as shown in FIG. 4, and can sequentially select bands in which system information will be acquired in the future. To do. This part can be implemented with an analog circuit or through digital signal processing.

The system information acquisition unit 30 acquires system information for the selected band. Here, the system information is a system ID or the like in the case of CDMA2000 1x, and a sector ID or the like in the case of CDMA2000 1x EV-DO. Such information is generally contained in a pilot channel or a control channel, and the terminal recognizes it by transmitting similar information in other standards such as WiMax, for example. It is possible.

FIG. 5 is a diagram showing a flow of signal processing for extracting system information from a CDMA system. Here, the frequency despreader 31 is a process of recovering a symbol multiplexed with an orthogonal code (for example, a Walsh code) or the like from a signal that has been band-spread with a PN (Pseudo Noise) code or the like.

The demultiplexer 32 is a process of separating each symbol before multiplexing using the orthogonality of the orthogonal code, and the decoder 33 detects the beat information of the separated symbol and performs deinterlacing. Reeve and convolutional decoding (convolutional decoding) or turbo decoding (turbo decoding) are performed. If decryption is performed, a package including system information is obtained. The system information extractor 34 searches for and outputs system information from the package according to a rule defined by a communication standard.

As shown in FIG. 6, the relay band determining unit 40 already has a system identification information database 41, and the comparator 42 compares the system information stored in the database 41 with the extracted system information. Then, a band to be relayed is selected to generate an appropriate control signal.
The stored system information may include whether relaying is possible, and if only the system information of a signal to be relayed is stored, or only system information that should not be relayed is stored, the relaying permission is included. In this case, the decision algorithm is appropriately programmed in advance, and the carrier information band from which the system information that matches the stored system information is extracted and the system information that does not match are extracted. Whether to relay to the carrier wave band can be easily determined. The relay band determiner 43 generates a control signal so as to select a carrier band search band.

  Moreover, it is also possible to change the determination criteria by providing a reference time generator 44 that provides time information as required. In the frequency division duplex system, an upward carrier wave and a downward carrier wave form a pair, and if a downward relay band is determined, the corresponding upward relay band is also determined immediately. In the time division multiplexing method, since the duplex is performed in a single band, the upward band and the downward band are the same. Therefore, in the time division multiplexing method, the same hardware can be used in a time division manner for upward and downward.

The carrier search controller 45 controls the system identification information database 41 and the relay band determiner 43. However, the relay band determiner 43 may not use the downward / upward relay band control signal in some cases.
That is, when relaying is not required for the entire carrier band, or when the carrier band to be relayed is not separated, or when there is only one carrier band, there is no relay band selection unit as shown in FIG. In order to reduce the power consumption of the repeater, a shutdown (Shut-down) operation is used to stop the operation of the power amplifier by cutting off the bias of the power amplifier circuit of the upward power amplifier 67 and the downward power amplifier 57. can do.

FIG. 7 is a block diagram for explaining a repeater control apparatus using frequency identification information and a method thereof according to the second embodiment of the present invention. This has an advantage that power consumption can be reduced as compared with the conventional method in which the input signal is cut off and the relay is stopped, and there is also an effect of extending the life of the power amplifier and suppressing noise and heat generation.
At this time, it is also possible to cut off the power of the remaining functional blocks while maintaining only the power of the downward signal receiving unit 51, the search band selection unit 20, the system information acquisition unit 30, and the relay band determination unit 40. This is because if system information is not acquired due to an abnormality such as a base station and the relay function is stopped, operation resumes as soon as the base station recovers normally while it is in a standby state while minimizing power consumption. There is also an advantage that you can.

As described above, the present invention relates to a method of stopping the operation of a power amplifier circuit or element that consumes the largest amount of power. Usually, a power amplifier is referred to as a shutdown mode for controlling the power amplifier element. Most of the RF power amplifiers used are Class A amplifiers, so power consumption is very large even when there is no signal, while power consumption is low in shutdown modes such as blocking the bias current. Few. This is a state in which only power amplification is stopped while power supply is maintained.

Therefore, in the present invention, a method of stopping the relay function while maintaining a part of the power supply of the repeater is mentioned. The reason why this part is important is that the existing method is an improved method than the conventional method. This is because the present invention satisfies all of the above conditions and can be applied to a simple device that does not require a relay band selection unit. In implementing the present invention, the present inventor has implemented the relay to be stopped by using it as a shutdown mode instead of the switch conceived from the functional aspect of the conventional invention.

The system information acquisition unit 30 and the relay band determination unit 40 shown in FIG. 1 or 7 can also be embodied as a one-chip microcomputer based on a digital central processing unit. Also, it can be implemented as a digital signal processor (DSP), or can be implemented as a digital logic circuit using an FPGA (Field Programmable Gate Array) or the like, such as an ASIC (Application Specific Integrated Circuit) or SoC (System on Chip). ), A commercial modem and a combination thereof. In addition, one or a plurality of hardware (H / W), software (S / W), or a combination thereof, in which some or all of the functions are not physically separated, may be realized.

FIG. 8 is a flowchart showing the relay band selection algorithm.
In the cutoff step of the upward power amplifier 67 and the downward power amplifier 57, when power is applied, the relay power is cut off for all upward and downward carriers. This is necessary to remove the interference and noise on the band that has not yet been determined.
In the step of selecting the carrier wave band to be searched, the carrier wave band to be searched is determined, and the frequency conversion is controlled in accordance therewith.

In the system information acquisition step, the system information carried on the selected carrier wave is decoded and extracted.
In the system list update step, the system information acquisition unit 30 creates and manages a system list, and this is based on the extracted system information if a plurality of base station signals are detected for each carrier wave. All the signal strengths are recorded. Since the system information is acquired one at a time for each carrier wave, the list is updated each time.
If there is no more base station to be detected, the system information acquisition for the carrier wave is finished. Or, the system information about other base stations is acquired.

Select system information of a signal having the strongest signal strength from the system list.
It is determined whether or not the system information selected in the updating step is a relay target signal.
If the signal is not a relay target signal in the determination step, the relay band selection unit 20 is controlled so as to interrupt the relay of the corresponding carrier wave. If it is a relay target signal, the next search target carrier wave is initialized while the relay is continued. At this time, if all the carrier waves are not relay targets, the operation of the power amplifying elements of the upward power amplifier 67 and the downward power amplifier 57 is stopped, and the transmission of all the RF power is stopped. At this time, it is also possible to cut off the power of the remaining functional blocks while maintaining only the power of the downward signal receiving unit 51, the search band selection unit 20, the system information acquisition unit 30, and the relay band determination unit 40. .

It repeats infinitely from the system information acquisition step to the control step.
On the other hand, the duplexer unit 15 on the terminal side shown in FIGS. 1 and 7 uses the difference between the frequency band of the signal received from the terminal 5 and the signal frequency band transmitted to the terminal 5 in the frequency division duplex system. In a time division duplex system, the reception signal and the transmission signal are separated according to the time allocated to each of the reception signal and the transmission signal. Therefore, the signal received from the terminal 5 is transmitted to the upward signal receiving unit 61, and the output of the downward power amplifier 57 is sent to the terminal 5 via the antenna.

The upward signal receiving unit 61 of the upward relay means removes RF band noise such as other band signals using a bandpass filter, and appropriately amplifies the signal received by the low noise amplifier or the like. If necessary, an IF signal processor that transitions this signal to an IF (Intermediate Frequency) frequency and re-filters it may be provided.

As shown in FIG. 1, the upward relay band selection unit 63 includes one or more band filters and a signal processing unit having the same function as that, and divides the entire service band by the control signal of the relay band determination unit 40. Thus, it is possible to suppress or pass a signal in a part of the band. The principle of operation is the same as that of the downward relay band selection unit 53, and a detailed description thereof is omitted.
The upward signal transmitting unit 65 amplifies the selected relay band signal again, and when the upward signal receiving unit 61 transits to the IF band, it performs the role of transitioning to the RF band again. Therefore, the upward signal transmission unit 65 drives the upward power amplifier 67. The upward power amplifying unit 67 performs a role of amplifying the RF band signal to a predetermined level so as to transmit the signal in the RF band to the base station side via the antenna.

The repeater control apparatus and method using the system identification information of the present invention configured as described above will be described in detail as follows.
The signal received from the base station 1 is amplified after other band signals and interference are removed by the downward signal receiving unit 51 and applied to the downward relay band selecting unit 53. As shown in FIG. 1, the downward relay band selection unit 53 includes one or more band filters and a signal processing unit having the same function, and divides the entire service band by the control signal of the relay band determination unit 40. Thus, a part of the signal can be suppressed or passed. The band selected in this way is amplified through the downward signal transmitting unit 55 and the downward power amplifier 57 and then sent to the terminal 5.

Further, the upward signal receiving unit 61 amplifies after removing other band signals and interference, and applies the amplified signal to the upward signal selecting unit 63. As shown in FIG. 1, the upward relay band selection unit 63 includes a band filter and a signal processing unit having the same function as that, and divides the entire service band by the control signal of the relay band determination unit 40, Some signals can be suppressed or passed. The band selected in this way is amplified through the upward signal transmission unit 65 and the upward power amplifier 67 and then sent to the base station 1.

On the other hand, the base station information acquisition unit 30 demodulates each divided carrier signal from the downward signal reception unit 51, and in the case of the system identification information of the base station 1, for example, CDMA2000 1x, the system identification information ( After confirming whether or not the downward signal received by decoding (SID) is a signal sent from the base station of the service provider to be relayed, it is determined whether or not relaying is possible.
At this time, the signal to be relayed is a system to be relayed, in which the identification code of the system (or base station) that sent the signal is stored in the repeater, or obtained through already programmed calculation formulas and logic It shall be the same as the identification code or not the identification code of the system for which relaying is prohibited.

If it is determined whether or not each carrier can be relayed, only the carrier band to be relayed is selected according to the characteristics of the bandpass filter already provided in the repeater, or bandpass filtering is performed so as to exclude the carrier band that should not be relayed. Control the instrument. At this time, the upward signal can be limited in both the band of the downward signal that is limited according to the duplexing method and the standard and the corresponding band.
FIG. 9 is a diagram showing another example of a band selection unit using N band filters, and includes a plurality of carrier band filters 71 to 73, switches 74 to 76, and a connection controller 77. The

Unlike another example of the band selection unit, in the implementation method of the present invention, when configuring the band selection unit, the carrier band group is formed without dividing all the carrier bands in consideration of the complexity of the apparatus. Thus, it is possible to use a method for making an optimum selection.

In addition, an attenuator that is not a switch may be used for the output of each bandpass filter, and the frequency characteristics of the bandpass filter are changed so as to suppress the gain of the band that is limited without an attenuator or a cut-off switch. It is also possible to use a method in which elements and devices having frequency selectivity are used in a complex manner without using a filter. Further, such a function can be realized by using digital signal processing or by using an analog circuit.

Below, embodiment of this repeater apparatus is described according to a frequency operation period as shown in FIG. FIG. 10 is a diagram illustrating an example of a multi-carrier band whose operation mode is changed according to an operation period.
First, in the first period of frequency operation, an operator performs service using an outdoor base station, and the repeater plays a role of extending the coverage of the base station by sending the signal of the outdoor base station to a shaded area.
In the second period of frequency operation, in order for the same operator to operate the femto cell, the first carrier is assigned exclusively to the femto cell, and the identification information of the femto cell is set in the relay prohibition system already stored in the repeater. . In this case, a repeater equipped with N band filters as shown in FIG. 9 blocks the first carrier band and relays the remaining N−1 bands.

In the third period of frequency operation, the second carrier and the third carrier are switched to the new standard LTE (Long Term Evolution). At this time, since the repeater cannot acquire the system identification information, the corresponding carrier band is excluded from the relay target band, and the upward / downward band selection unit blocks the carrier band so that it cannot be amplified.
In the fourth period of frequency operation, the right to use the entire frequency band of the corresponding operator is extinguished or transferred so that the new operator can operate and system identification information cannot be obtained, or system identification information Even if it is acquired and confirmed, it becomes a relay prohibition target system and no more relaying is performed for the entire band. In this case, the transmission power amplifier can be cut off, or the entire repeater power supply can be cut off.

As another example, as shown in FIG. 11, the frequency band of the service provider is changed by the frequency reorganization plan. FIG. 11 is a diagram illustrating an example in which an operation band moves according to an operation period.
According to the present invention, when the frequency band allocated to each operator moves, divides, expands, or contracts in the dimension of national radio wave management or by performing re-ubiquity for the entire frequency band, relaying The device has a function that can automatically find a band to be relayed and adapt to the ubiquity of the changed frequency.

In this case, the repeater remembers the frequency of the carrier moving in advance and tries to acquire the system information of the downward signal received periodically or at any time or at the time determined by the setting of the function of the internal timer, As a result, the relay band can be determined again.
At this time, the band selection unit can be more easily implemented by using a variable bandwidth / variable frequency band filter as shown in FIG.

As described above, according to the present invention, it is possible to implement a repeater control apparatus and method for selecting a service band to be relayed using system identification information of a downward signal. In addition, the present invention can implement a repeater control apparatus and method for maintaining or canceling relay by maintaining or canceling the operation of the power amplifying element of the upward and downward power amplifier based on the system information.
Although the technical idea about the repeater control apparatus and the method using the frequency identification information of the present invention has been described with reference to the drawings, this is an exemplary description of the best embodiment of the present invention. It is not intended to limit the scope of the claims of the invention. It is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

10, 15: Duplexer unit 20: Search band selection unit 30: System information acquisition unit 40: Relay band determination unit

Claims (12)

Each duplexer section (10, 15) on the base station side and terminal side,
Downward signal reception unit (51), downward relay band selection unit (53), downward signal transmission unit (55), and downwards that perform signal processing to relay a signal received from base station (1) to terminal (5) Downward relay means comprising a power amplifier (57);
A search band selection unit (20) for acquiring base station information from the received downward signal;
A system information acquisition unit (30) for acquiring system information for the selected band;
A relay band determining unit (40) for selecting a band to be relayed and generating an appropriate control signal;
Upward relay comprising an upward signal receiving unit (61) for processing an upward signal received from the subscriber terminal (5), an upward relay band selection unit (63), an upward signal transmission unit (65), and an upward power amplifier (67) And a repeater control apparatus using system identification information. A search band selecting unit (20) is connected between the downward signal receiving unit (51) and the downward power amplifier (53), and the relay band determining unit (40) includes an upward / downward relay band selecting unit. The repeater control device using system identification information according to claim 1, wherein the search band selection unit (20) and the upward / downward power amplifiers (57, 67) are connected. . The relay band determining unit (40) includes M band filters (81 to 83), switches (84 to 86), filter band removers (88), and connection controllers, which are fewer than N for N carriers. The repeater control apparatus using the system identification information according to claim 1, wherein 4. The pass band width is optimally controlled through a repeater band determination unit and a band filter controller using M band filters in which the bandwidth of each band filter is adjusted. Repeater control device using system identification information. The search band selection unit (20) includes an AD converter (91), a programmable digital filter (92), a DA converter (93), a clock generation and control logic (95), and a filter coefficient generator (94). The repeater control apparatus using the system identification information according to claim 1, wherein the digital signal processor is used. The system identification according to claim 1, wherein the relay band determining unit (40) includes a plurality of carrier band filters (71 to 73), switches (74 to 76), and a connection controller (77). A repeater control device using information. A non-switching attenuator is used for the output of each bandpass filter, and the frequency characteristic of the bandpass filter is changed so as to suppress the gain of the band to be limited without an attenuator or a cut-off switch. A repeater control apparatus using the system identification information according to claim 6. The search band selection unit (20) includes a frequency converter (97) and a band filter (98), and sequentially selects a band for acquiring system information in the future.
The system information acquisition unit (30) includes a frequency despreader (31), a demultiplexer (32), a decoder (33), and a system information extractor (34).
The relay band determining unit (40) includes a system identification information database (41), a comparator (42), a relay band determiner (43), a reference time generator (44), and a carrier search controller (45). The repeater control apparatus using the system identification information according to claim 1. Each duplexer section (10, 15) on the base station side and terminal side,
Downward relay comprising a downward signal receiving unit (51), a downward signal transmitting unit (55), and a downward power amplifier (57) for performing signal processing to relay a signal received from the base station (1) to the terminal (5) Means,
A search band selector (20) comprising a frequency converter (97) and a bandpass filter (98) so as to obtain base station information from the received downward signal;
A system information acquisition unit comprising a frequency despreader (31), a demultiplexer (32), a decoder (33) and a system information extractor (34) so as to acquire system information for the selected band. (30),
A system identification information database (41), a comparator (42), a relay band determiner (43), a reference time generator (44), and a carrier search control so as to select a band to be relayed and generate an appropriate control signal A relay band determining unit (40) comprising a device (45);
And an upward signal reception unit (61) for processing an upward signal received from the subscriber terminal (5), an upward signal transmission unit (65), and an upward relay means including an upward power amplifier (67). Repeater control device using system identification information. Each duplexer unit on the base station side and the terminal side, a downward signal receiving unit that performs signal processing to relay a signal received from the base station to the terminal, a downward relay band selection unit, a downward signal transmission unit, and downward power Downward relay means comprising an amplifier, a search band selection unit that acquires base station information from the received downward signal, a system information acquisition unit and a relay band determination unit, and an upward signal that processes the upward signal received from the subscriber terminal An upward relay means comprising a reception unit, an upward relay band selection unit, an upward signal transmission unit, and an upward power amplifier, and
Cutting off relay power for all upward and downward carriers when power is applied; and
Determining a carrier band to be searched and selecting a carrier band to be searched for controlling frequency conversion in accordance with the carrier band;
A system information acquisition step for decoding and extracting system information carried on the selected carrier;
A system list update step for creating and managing a system list in the system information acquisition unit;
If there are no more base stations to be detected, end the acquisition of system information about the carrier wave; if there are more base stations to be detected, continue to acquire system information about other base stations;
Selecting system information of a signal having the strongest signal strength from a system list;
Determining whether the system information selected in the updating step is a relay target signal;
In the determination step, if the signal is not a relay target signal, the relay band selection unit is controlled to interrupt the relay of the corresponding carrier. If the signal is the relay target signal, the next search target carrier is selected while continuing the relay. Steps,
A repeater control method using system identification information, comprising: an infinite repetition from the system information acquisition step to the control step. 11. The system identification according to claim 10, wherein if all the carriers are not to be relayed, the operation of the power amplifying elements of the upward power amplifier and the downward power amplifier is stopped, and all RF power transmission is stopped. A repeater control method using information. 11. The system identification according to claim 10, wherein the power of the remaining functional blocks is cut off while maintaining only the power of the downward signal receiving unit, the search band selection unit, the system information acquisition unit, and the relay band determination unit. A repeater control method using information.

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