KR200267925Y1 - Apparatus for relaying mobile communication signals for multi-directional sector antenna using micro-wave frequency band - Google Patents

Abstract

The present invention relates to a relay device for a mobile communication service such as a mobile subscription wireless telephone (cellular phone), a personal mobile phone (PCS), IMT-2000 and the like.

The repeater of the present invention consists of a microwave repeater installed in a base station and a microwave repeater installed in a shadowed area, and the microwave repeater installed in the shadowed area receives a microwave frequency signal transmitted from the microwave repeater of the base station. A distribution unit for converting and distributing the first to nth sector frequency bands, a first to nth forward frequency converter for receiving the first to nth sector frequency bands from the distribution unit and converting the service frequency signal into a first to nth sector frequency bands; A first to n-th reverse frequency converter for converting the service frequency signal inputted from the transmitting and receiving means into the first to n-th sector frequency, and a synthesis for converting the output of the first to n-th reverse frequency converter into a microwave frequency band signal. Contains wealth.

Therefore, according to the present invention, even when a multi-directional sector type antenna is used, service signals can be relayed, and the service capacity can be increased by the number of sectors, thereby increasing the capacity at a low cost, thereby achieving economic benefits.

Description

Apparatus for relaying mobile communication signals for multi-directional sector antenna using micro-wave frequency band}

The present invention relates to a wireless repeater for a mobile communication service such as a mobile subscription mobile phone (cellular phone), a personal mobile phone (PCS), IMT-2000, and more particularly, in a multi-directional sector type mobile communication service system. (M / W: micro-wave) The present invention relates to a repeater for relaying using a frequency band.

In recent years, as subscribers of mobile subscription wireless phones and personal mobile phones (PCS) have increased rapidly, the needs of subscribers requiring better call quality have increased, and in order to satisfy the needs of these subscribers, shaded areas with poor call quality have been developed. Many repeaters are installed to solve this problem.

1 is a schematic diagram showing a repeater for a general mobile communication service. The mobile communication system is composed of a mobile telephone subscriber switching station for managing call processing and location information of the mobile subscriber, a base station controller connected to the switching station, a plurality of base stations, and the like. The base station divides the entire service area into cell units, and then wirelessly communicates with mobile communication subscribers in a coverage area that can be distributed and arranged in each cell. At this time, the area where the call is not possible due to the buildings or tunnels in the city is called a 'shading area', and a repeater is installed to provide services in this shaded area.

Referring to FIG. 1, the conventional repeater 104 converts a high frequency radio signal of a service frequency Fs received from a base station 102 into an intermediate frequency IF, and then amplifies the same. The signal is converted into a signal and then amplified to a high power and radiated to a shadow area through an antenna. And after converting the high frequency signal of the service frequency (Fs) received from the mobile terminal 106 in the shaded area to the intermediate frequency (IF) and amplified, and then converts it to the signal of the service frequency (Fs) and amplifies it to a high output Transmission to the base station side antenna.

As described above, the conventional repeater 104 is located in the shadowed area and amplifies the weak service frequency (Fs) signal received from the base station to the high power again and delivers it to the subscriber side of the shadowed area as it is. That is, the conventional repeater 104 can receive the signal when the base station 102 provides the omni-directional or one-sector direction service to provide omni-directional or one-sector direction service.

Therefore, when a base station intends to service using a multi-directional sector antenna, there is a problem that relaying is impossible using a conventional repeater.

The present invention aims to provide a mobile communication service repeater capable of relaying a service signal using a microwave frequency band in a multi-directional sector type mobile communication system to solve the above problems.

1 is a schematic diagram showing a repeater for a general mobile communication service,

2 is a schematic diagram illustrating a relay concept using a microwave frequency band according to the present invention;

3 is a block diagram showing a repeater for a mobile communication service according to the present invention;

4A to 4C are diagrams illustrating radiation patterns of a multi-directional sector type antenna applied to the present invention;

5 is a block diagram showing the configuration of the microwave repeater for a base station shown in FIG.

Figure 6 is a block diagram showing the configuration of the microwave repeater for the shadow area shown in Figure 3,

FIG. 7 is a block diagram illustrating a detailed configuration of the frequency converter shown in FIGS. 5 and 6.

☞ Explanation of symbols for main parts of drawing

202: base station 210,220: base station, shadow area microwave repeater

206: mobile terminal 301: mux / demux

302: base transceiver station

304-1 ~ 304-k: Transceiver for repeater

303: transceiver group 320: transceiver

329-1 to 329-n, 349-1 to 349-n: Sector antenna 339, 340a: Microwave antenna

330: base station side microwave repeater

340: shadow area microwave repeater

331-1 to 331-n: base station forward frequency converter

332-1 to 332-n: base station reverse frequency converter

333,348: synthesis section 334,341-1 ~ 341-n: high power amplifier

335,340b: Diplexer 336,346,342-1 ~ 342-n: low noise amplifier

337,345: distribution

343-1 to 343-n: shadow-side forward frequency converter

344-1 to 344-n: shadow area reverse frequency converter

350-1 to 350-n: Diplexer

709a, 709b, 709a ', 709b': frequency variable

In order to achieve the above object, the device of the present invention, in the relay device for relaying the signal of the base station for providing a mobile communication service as a service frequency signal using a multi-directional sector type antenna to the shadow area,

The microwave repeater installed on the base station side, the first to n-th forward frequency converter for converting the service frequency bandwidth (eg, 10 ~ 20MHz) signal transmitted from the base station to the first to n-th frequency signal; A synthesizer for synthesizing the outputs of the first to nth forward frequency converter and converting the microwave frequency signal into a microwave frequency signal; Transmitting and receiving means for transmitting the output of the synthesizer through a microwave antenna and receiving a microwave frequency signal from the microwave antenna; A distribution unit converting the microwave frequency signal received from the transmission / reception means into first to nth frequency signals and distributing the signal; And first to n-th reverse frequency converters for converting the first to n-th frequency signals received from the distribution unit into service frequency signals.

The microwave repeater installed in the shadow area, the distribution unit for receiving and converting the microwave frequency signal transmitted from the base station-side microwave repeater to the first to n-th frequency signal for distribution; First to n-th forward frequency converters which receive first to n-th frequency signals from the distribution unit and perform reproduction conversion on the first base station service frequency bandwidth signals; First to nth transmission / reception means for transmitting a service frequency signal input from the first to nth forward frequency converter to a corresponding sector antenna; First to n-th reverse frequency converters for converting service frequency signals inputted from the first to nth transmitting and receiving means into first to nth frequency signals; And a synthesizing unit synthesizing the outputs of the first to nth reverse frequency converters and converting the microwaves into microwave signals.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic diagram illustrating a concept of relaying a service signal using a microwave frequency band in a base station employing a multi-directional sector antenna according to the present invention.

Referring to FIG. 2, the base station 202 employing a multi-directional sector antenna transmits and receives a signal of a service frequency band in three directions by using three sector antennas. At this time, it should be noted that the signals of the same frequency band (Fs) is radiated to each of the sectors in three directions. In this case, there is an advantage in that the capacity of the base station can be increased by the number of sectors. Theoretically, if full isolation between sectors is achieved, sectoring into n sectors increases the service capacity by n times.

In order to relay the service signal in the base station 202 using the sector antenna as described above, the microwave repeaters 210 and 220 according to the present invention are installed in the base station side and the shadow area, respectively.

The microwave repeater 210 located in the base station side receives the service frequency (Fs) signal as many as the number of sectors, converts the signals into different frequencies (F1 to Fn) as many as the number of sectors, and synthesizes the microwave frequency band (F _{M). / W} ) to send to the shadow area. The microwave repeater 220 located in the shadowed area converts the signals of the microwave frequency (F _{M / W} ) received from the microwave repeater 210 of the base station side, _and then converts signals of different frequencies (F1 to Fn) as many as the number of sectors. After converting to, it is distributed and converted to the same service frequency (Fs) signal as many as the number of sectors and transmitted to the corresponding sector antennas, respectively.

The service frequency (Fs') signal received from the mobile terminal 206 in the shaded area by each sector antenna is converted into different frequency signals F1 'to Fn' as many as the number of sectors, and then synthesized and the microwave frequency ( F _{M / W} ) is converted and transmitted to the base station. The microwave repeater 210 located at the base station side receives signals from the microwave frequency F _{M / W} band received from the shaded region microwave repeater 220 again as many different frequencies as the number of sectors (F1 'to Fn'). After conversion to a signal, it is distributed and converted to the same service frequency (Fs') signal as many as the number of sectors and transmitted to the base station 202.

Here, the service frequency (Fs) is a base station transmission (downward) frequency band of about 869MHz ~ 880MHz band, mobile station transmission (upward) frequency band of about 824MHz ~ 835MHz, mobile phone (PCS) The base station transmit (downward) frequency band is approximately 1840 MHz to 1870 MHz, and the mobile station transmit (upward) frequency band is approximately 1750 MHz to 1780 GHz. In the case of IMT-2000, the mobile station transmission (upward) frequency band is approximately 1920 MHz to 1980 MHz, the base station transmission (downward) frequency band is approximately 2110 MHz to 2170 MHz, and the microwave frequency (F _{M / W} ) band is approximately, for example. 3 to 18 GHz.

3 is a block diagram illustrating a repeater for a mobile communication service according to the present invention, in which n sector antennas 329-1 to 329-n and 349-1 to 349-n are used. In addition, the MUX / DEMUX capacity is installed to transmit and interface k repeaters separately from the base station service transceiver of FIG. 3.

Referring to FIG. 3, the base station system transmits / receives a service frequency (Fs) signal through a mux / demux 301 for interfacing a signal with an exchange and through the sector antennas 329-1 to 329-n at the base station. A base transceiver station for receiving subscriber SI signals from the mux / demux 301 and converting them into service frequency (Fs) signals through coding, decoding, modulation and demodulation, and converting service frequency (Fs) signals into SI signals ( 302 and the transmission signal input from the base station transceiver 302 to the sector antennas 329-1 to 329-n, and the received signal received from the sector antennas 329-1 to 329-n. Amplifies the transceiver group 303 and transmits the signal to the base transceiver station, and receives the SI signal from the mux / demux 301 for the repeater and converts it into a service frequency (Fs) signal (forward), and the service frequency (Fs). K repeaters for converting signals to SI signals (reverse direction) It consists of brides 304-1 through 304-k. Here, the base station transceiver 302 and the repeater transceivers 304-1 to 304-k are composed of n base station and repeater transceivers corresponding to the number of sectors, and the base station transceiver group 303 is n. Two separate transceiver amplifiers 320.

In addition, the microwave repeater of the present invention for relaying a service signal in the multi-directional sector type base station as described above branches the n service signals (Fs) from the n transmit / receive amplifiers 320 to a microwave frequency (F _{M / W} ) band. The base station side microwave transmits the signal and converts the microwave frequency (F _{M / W} ) band signal received from the shadow area side microwave repeater 340 into the service signal Fs' and transmits the signal to the transceiver amplifier 320. Repeater 330, and receiving and synthesizing the service frequency signals (Fs) for the repeater from the transmitter and receiver for n repeaters, converts the signal into microwave frequency band signal and transmits, and receives the microwave frequency band F _{M / W)} My base station side for transmitting a signal to the service signal (Fs') after distribution is converted into n number of repeater transmission and reception unit (304-1 ~ 304-k) A wave repeater (330-1 ~ 330-k), and the microwave-frequency receiver located in the shadow area from the base station side Microwave Repeater (330-1 ~ 330-k) ( F M / W) of n number of service signals After converting to a frequency signal Fs and amplifying the high power, the signal is transmitted to the corresponding sector antennas 349-1 to 349-n, and the service frequency signals Fs' received from each sector antenna 349-1 to 349-n are received. After synthesis, it is composed of a microwave repeater (340-1 ~ 340-k) in the shaded region side that converts the microwave frequency band (F _{M / W} ) signal and transmits it.

Here, since the base station-side microwave repeater 330 and the base station-side microwave repeater 330-1 to 330k differ only in where the input signal is input, and the internal configuration is the same, the base station-side microwave repeater 330 Only the microwave repeater will be described in detail, and the shadowed area-side microwave repeater also has the same configuration, so only one shaded area-side microwave repeater will be described in detail in FIG. 6.

4A to 4C are diagrams illustrating radiation patterns of the multidirectional sector antennas according to the present invention, and FIG. 4A is an example of patterns radiated from the three-way sector antennas 329-1 to 329-3, and FIG. Is an example of a pattern radiated from the four-way sector antennas 329-1 to 329-4, and FIG. 4C is an example of a pattern radiated from the six-way sector antennas 329-1 to 329-6.

4A to 4C, it can be seen that as many sectors as n sector antennas are generated. As described above, as the number of sectors increases, the service capacity increases. For example, the conventional PCS microwave repeater repeats only one sector or omni-directional. When IMT-2000 is relayed in this manner, ultra-high-speed data video communication is possible only for 10-channel synchronous communication in the 20 MHz band, as shown in FIG. 4C. When six-sector antennas are used, 60-channel synchronous communication is possible by servicing the 20 MHz band in six directions. Therefore, according to the present invention, there is a communication effect of 6 times, which can realize 6 times of economic benefit.

5 is a block diagram showing the configuration of the microwave repeater for the base station shown in FIG.

Referring to FIG. 5, the microwave repeater 330 for a base station includes a first forward frequency converter 331-1 for converting a service frequency signal Fs transmitted from the base station into a first frequency signal F1, and a base station from the base station. A second forward frequency converter 331-2 for converting the delivered service frequency signal Fs to a second frequency signal F2, and the service frequency signal Fs transmitted from the base station to the nth frequency signal Fn. Combining the output of the n-th forward frequency converter (331-n) and the first to n-th forward frequency converter (331-1 to 331-n) to convert the microwave frequency band signal (F _{M / W} ) Synthesizing unit 333, M / W high power amplifier (HPA) 334 for amplifying the output of the synthesis unit 333 to a high output, a diplexer 335 or a circulator, diplexer for separating and combining the transmission and reception signals Low noise amplifier (LNA: 336), low noise amplification, amplifying the output of the amplifier 335 with low noise Microwave band signals (336) (F _{M / W)} output from the first frequency signal (F1 ') to the n frequency signal (Fn') for converting the distribution in distributor 337, distributor 337 The first reverse frequency converter 332-1 converts the received first frequency signal F1 'into a service frequency signal Fs', and converts the second frequency signal F2 'into a service frequency signal Fs'. The second reverse frequency converter 332-2, the nth reverse frequency converter 332-n for converting the nth frequency signal Fn 'into the service frequency signal Fs', and the microwave antenna 339. do.

FIG. 6 is a block diagram showing the configuration of the microwave repeater for the shadow area shown in FIG.

Referring to FIG. 6, the microwave repeater 340 for the shadow area includes a microwave antenna 340a, a diplexer 340b for separating transmission and reception signals, and a microwave frequency band signal received from the antenna 340a. _{M / W} to convert the low noise amplifier (LNA) 346 and the microwave frequency signal F _{M / W} of the low noise amplifier 346 into the first frequency signal F1 to the n th frequency signal Fn. The first frequency converter 343-1 and the second frequency signal 3 that convert the first frequency signal F1 received from the distribution unit 345 and the distribution unit 345 into the service frequency signal Fs. A second forward frequency converter 343-2 for converting F2 into a service frequency signal Fs, and an nth forward frequency converter 343-n for converting an nth frequency signal Fn into a service frequency signal Fs Amplifying the output of the first forward frequency converter 343-1 to a high output so that the first sector antenna 349-1 is amplified; A second high power amplifier for amplifying the outputs of the first high power amplifier (HPA) 341-1 and the second forward frequency converter 343-2 for output to the second sector antenna 349-2, HPA: 341-2), an n-th high power amplifier (HPA: 341-n) for amplifying the output of the n-th forward frequency converter 343-n to a high output and outputting it to the n-th sector antenna 349-n; First low noise amplifier (LNA) 342-1 for amplifying the signal received from the first sector antenna 349-1 with low noise, and second low noise amplifying the signal received from the second sector antenna 349-2 with low noise. Input from an amplifier (LNA: 342-2), an n-th low noise amplifier (LNA 342-n) that amplifies a signal received from the n-th sector antenna 349-n with low noise, and a first low noise amplifier 342-1 A first frequency converter 344-1 for converting the received service frequency signal Fs 'into a first frequency signal F1' and a second low noise amplifier 342-2. A second reverse frequency converter 344-2 for converting the frequency frequency signal Fs' into a second frequency signal F2 'and a service frequency signal Fs' transmitted from the nth low noise amplifier 342-n. Synthesizes the outputs of the n th reverse frequency converter 344-n and the first through n th reverse frequency converters 344-1 through 344-n to convert the n th frequency signal into the n th frequency signal Fn '. consists of 347): F _{M / W)} and a combination unit 348 for converting a signal, a high power amplifier (HPA for amplifying the output of the combining unit 348, a high output. In FIG. 6, reference numerals 350-1 to 350-n denote diplexers.

FIG. 7 is a block diagram illustrating a detailed configuration of the frequency converter shown in FIGS. 5 and 6. The first to nth forward frequency converters 331-1 to 331-n and the shaded region side microwave repeaters 340, 340-1 to 340-k in the base station side microwave repeaters 330, 330-1 to 330-k. The first to n-th reverse frequency converters 344-1 to 344-n in FIG. 9 are identical in configuration and operation except that they are different from each other, and the first to n-th reverse frequency converters 344-1 to 344-n in the base station-side microwave repeater First to nth forward frequency converters 343-1 to 343 in the first to nth reverse frequency converters 332-1 to 332-n and the shaded region-side microwave repeaters 340 and 340-1 to 340-k. -n) is the same in configuration and operation except that they differ only in name, and thus only the configurations of the first forward frequency converter 331-1 and the first reverse frequency converter 332-1 will be described as an example.

Referring to FIG. 7, the first forward frequency converter 331-1 converting the service frequency signal Fs into the first frequency signal F1 has a low noise amplifier LNA for amplifying the service frequency signal Fs with low noise. A first mixer (MIXER: 702) for converting the output of the low noise amplifier 701 and the first local oscillation signal Losc1 into a frequency variable 709a and then converting the mixture into an intermediate frequency signal IF. And a high selectivity bandpass filter (BPF) 703 for selecting an intermediate frequency signal at the output of the first mixer 702 and an intermediate frequency amplifier (AMP: 704) for amplifying the intermediate frequency signal (IF). A second mixer (MIXER) 705 and a second mixer 705 for outputting the first frequency signal F1 by mixing the frequency signal with the second local oscillation signal Losc2 after frequency varying with the frequency variable 709b. A high frequency pass filter (HPF) 706 and a high frequency pass filter 706 which select and output only the first frequency signal F1 from the output of An amplifier 707 for amplifying the output of the amplifier, a first local oscillator 708a for generating a first local oscillation signal Losc1, and a second local oscillator 708b for generating a second local oscillation signal Losc2. . Here, the mixer outputs a "f1 + f2" signal by mixing the f1 signal and the f2 signal when the frequency of the high frequency input signal is f1 and the local oscillation signal is f2. Therefore, if the band pass filter is installed at the output of the mixer and the "f1 + f2" signal (sum signal) is selected, the signal which is up (UP) relative to the input signal frequency is output, and the "f1-f2" signal (difference signal) is output. If selected, the signal is down compared to the input signal frequency.

Meanwhile, the first reverse frequency converter 332-1 converting the first frequency signal F 1 ′ into the service frequency signal F s ′ has a low noise of the first frequency signal F 1 ′ received from the distribution unit 337. And outputs the intermediate frequency signal IF by varying the frequency of the low noise amplifier 701 'and the low noise amplifier 701' which are amplified by the second local oscillation signal Losc2 with a frequency variable 709a '. Selecting the intermediate frequency signal IF at the outputs of the first mixer 702 'and the first mixer 702', the high selectivity bandpass filter 703 'and the intermediate frequency amplifier 704' for amplifying the intermediate frequency signal. And a second mixer 705 'and a second for mixing the first local oscillation signal Losc1 with the frequency variable 709b' and then outputting the service frequency signal Fs'. Output of the high frequency pass filter 706 'and the high frequency pass filter 706' which select and output only the service frequency signal Fs 'from the output of the mixer 705'. Amplifier 707 'for amplifying the output, a first local oscillator 708a for generating a first local oscillation signal Losc1, and a second local oscillator 708b for generating a second local oscillation signal Losc2. .

In this case, the first local oscillator 708a and the second local oscillator 708b may be commonly used in the forward frequency converter and the reverse frequency converter, or may be implemented separately. In addition, a reference clock generator (or reference oscillator) 710 is provided for receiving a GPS signal or the like for synchronizing the system and generating various reference clocks required by the repeater. The reference clock generator 710 converts the reference clock into each frequency converter. All local oscillators 708a and 708b and the local oscillator 333a of the synthesis section and the local oscillator 337a of the distribution section.

Although not shown in the drawing, the mixer 333 and the distributor 337 are also provided with a mixer, and the mixer of the synthesizer 333 mixes the first to n-th frequency signals F1 to Fn with the local oscillation signal. The wave frequency signal F _{M / W} is converted, and the mixer of the distribution unit 337 converts the microwave frequency signal F _{M / W} into the first to nth frequency signals F1 'to Fn'.

In addition, the high selectivity bandpass filters 703 and 703 'may be implemented as SAW filters, mechanical filters, active filters, etc. so as to select a frequency bandwidth (several MHz to several tens of MHz) selected by the base station according to service providers.

In addition, when the microwave repeater is actually implemented, it is possible to provide better service by adding various auxiliary functions (for example, frequency stability function, frequency variable function, fault monitoring function, remote control function, etc.) to the basic configuration described above. That is, a pilot signal can be sent between a microwave repeater located at a base station and a microwave repeater located at a shadow area to monitor a fault, provide a trip line for communication between operators, and monitor a remote operation. Data can also be exchanged for this purpose.

Next, the operation of the apparatus of the present invention configured as described above will be described in detail by dividing the forward direction of the base station signal transmitted to the mobile subscriber side and the reverse direction of the mobile subscriber side signal transmitted to the base station side.

1. Forward operation

When the microwave repeater according to the present invention operates a base station in a mobile communication network such as a PCS or cellular network, an area (shading area) where communication is impossible due to obstacles (buildings, mountains, underground tunnels, etc.) occurs in a service area. By using the microwave repeater 330 installed in the base station employing the multi-directional sector antenna (Sector Antenna) and the microwave repeater 340 installed in the shadowed area to relay the signal between the subscriber and the base station in the shadowed area will be.

The microwave repeater 330 installed in the base station employing the multi-directional sector antenna (Sector Antenna) is a base station service frequency signal (Fs) output from the transceiver 320 to each sector antenna (329-1 ~ 329-n) or The repeater service frequency signal Fs output from the base transceiver station 320 and the repeater transceivers 304-1 to 304-k is received.

The n service frequency signals inputted to the microwave repeater 330 installed in the base station are the first to nth frequency signals F1 to different frequencies from the first to nth forward frequency converters 331-1 to 331-n. After conversion to Fn), the synthesis unit 333 converts the microwave frequency signal. In this case, the n service frequency signals Fs input to the repeater 330 are the same frequency band signals (the bandwidth may be the same or different, and the service contents are different), or the first to nth frequency signals F1 to Fn may be different. The frequencies must be different so that they do not overlap each other.

In the forward frequency converters 331-1 to 331-n, the service frequency signal Fs is amplified by the low noise amplifier 701 and then mixed with the first local oscillation signal by the first mixer 702 to be converted into an intermediate frequency signal. . The intermediate frequency signal is removed from the high selectivity bandpass filter 703, the desired frequency band signal is selected, amplified by the amplifier 704, and then mixed with the second local oscillation signal by the second mixer 705. The first to nth frequency signals F1 to Fn are converted. The first to n th frequency signals F1 to Fn are amplified by the amplifier 707 after the noise is removed through the high frequency pass filter 706 and only the desired signal band passes.

The first to n th frequency signals F1 to Fn output from the forward frequency converters 331-1 to 331-n are input to the combining unit 333, and the local oscillation signal is mixed with the mixer of the combining unit 333. The mixture is converted into a microwave frequency signal (F _{M / W} ), _and then amplified to a high output by the high power amplifier 334 and output to the microwave antenna 339.

The microwave repeater 340 installed in the shadowed area receives the signal transmitted from the base station-side microwave repeater 330 through the microwave antenna 340a and amplifies the low noise amplifier 346 into low noise. The low noise amplified microwave signal F _{M / W} is mixed with the local oscillation signal in the distribution unit 345, divided into first to nth frequency signals F1 to Fn, and then passed through a filter for passing the corresponding band. Inputs are respectively made to the forward frequency converters 343-1 to 343-n for the repeaters.

The forward frequency converters 343-1 to 343-n for the repeater convert the input first to nth frequency signals F1 to Fn into service frequency signals Fs, and the service frequency signals Fs of the repeater Sectors 349-1 through 349-n transmit to the high power amplifiers 341-1 through 341-n for transmission to the shadowed areas.

The first to n th frequency signals F1 to Fn input to the forward frequency converters 343-1 to 343-n of the repeater are amplified by the low noise amplifier 701 ′ and then the second to the second mixer 702 ′. It is mixed with the local oscillation signal and converted into an intermediate frequency signal. The intermediate frequency signal is removed from the high selectivity bandpass filter 703 ', only the desired frequency band signal is selected, amplified by the amplifier 704', and then reconstructed with the first local oscillation signal by the second mixer 705 '. Are mixed and converted into a service frequency signal Fs. The service frequency signal Fs is amplified by the amplifier 707 'after the noise is removed through the high frequency pass filter 706' and only the desired signal band is passed.

The service frequency signals Fs output from the forward frequency converters 343-1 to 343-n for the repeater are amplified by the corresponding high output amplifiers 341-1 to 341-n, and then the corresponding sector antennas 349-1 to 349. -n) is sent to the shaded area. As such, the signals transmitted from the sector antennas 349-1 to 349-n are transmitted to the mobile subscribers in the shaded area.

2. Reverse operation

The service frequency signal Fs' of the subscriber, which is received through the air from the mobile communication subscriber station located in each sector area to the sector antennas 349-1 to 349-n of the repeater, is a low noise amplifier 342-1 to 342-n. After being amplified to low noise at the first to n-th repeater reverse frequency converter (344-1 ~ 344-n). The n service frequency signals Fs' inputted to the repeater reverse frequency converters 344-1 to 344-n have frequencies different from each other in the first to nth repeater reverse frequency converters 344-1 to 344-n. After the first to nth frequency signals F1 'to Fn' are converted into other first to nth frequency signals F1 'to Fn', the synthesizer 348 is converted to the microwave frequency signal F _{M / W.} At this time, the service frequency signal Fs' must have a different frequency so as not to overlap the same frequency band signal (the bandwidth may be the same or different, and the service contents are different) or the first to nth frequency signals F1 'to Fn', respectively. do.

In the repeater reverse frequency converters 344-1 to 344-n, the service frequency signal Fs' is amplified by the low noise amplifier 701 and then mixed with the first local oscillation signal by the first mixer 702 to obtain the intermediate frequency signal. Is converted to. This intermediate frequency signal is amplified by the amplifier 704 after the noise is removed from the high selectivity bandpass filter 703 and only the desired frequency band signal is selected. The signal amplified by the amplifier 704 is mixed with the second local oscillation signal in the second mixer 705 and converted into the first through n-th frequency signals F1 'through Fn'. The first to n th frequency signals F1 'to Fn' are amplified by the amplifier 707 after the noise is removed through the high frequency pass filter 706 and only the desired signal band is passed.

The first to n th frequency signals F1 ′ to F n ′ output from the reverse frequency converters 344-1 to 344-n are input to the combiner 348, and are locally oscillated by a mixer of the combiner 348. The signal is mixed with the signal and converted into a microwave frequency signal (F _{M / W} ), _and then amplified to a high output by the high power amplifier 347 and output to the microwave antenna 340a.

The microwave repeater 330 installed in the base station receives the signal transmitted by the microwave region side microwave repeater 340 through the microwave antenna 339 and amplifies the low noise amplifier 336 into low noise. The low noise amplified microwave signal is mixed with the local oscillation signal in the distribution unit 337, divided into first to nth frequency signals F1 'to Fn', and passed through a corresponding band to pass the corresponding frequency converter. (332-1 to 332-n).

The reverse frequency converters 332-1 to 332-n for the base station convert the inputted first to nth frequency signals F1 'to Fn' into service frequency signals Fs ', and the service frequency signals Fs'. ) Are output to the base transceiver station 302 and the repeater transceiver 304-1 to 304-k, respectively. The first to nth frequency signals F1 'to Fn' inputted to the base station reverse frequency converters 332-1 to 332-n are amplified by the low noise amplifier 701 'and then the first mixer 702'. It is mixed with the second local oscillation signal and converted into an intermediate frequency signal. The intermediate frequency signal is removed from the high selectivity bandpass filter 703 ', the desired frequency band signal is selected, amplified by the amplifier 704', and then the second local oscillation signal by the second mixer 705 '. Is converted to a service frequency signal Fs'. The service frequency signal Fs' is amplified by the post-amplifier 707 'where noise is removed through the high frequency pass filter 706' and only a desired signal band is passed.

The service frequency signal Fs' output from the reverse frequency converters 332-1 to 332-n for the base station is output to the base transceiver station 302 and the repeater transceiver 304-1 to 304-k, respectively. do.

As described above, the repeater according to the present invention, when the base station uses a multi-directional sector type antenna, frequency multiplexes the signals to be transmitted from each sector antenna so as not to overlap, converts them into microwave frequency signals, and transmits them to the shadow area. In the shadow area, the microwave signal is demultiplexed, converted into each frequency signal, and then converted into a service frequency signal, and then transmitted through the sector antenna, so that the base station signal employing the multi-directional sector antenna can be relayed as it is. There is an advantage. In particular, when the sector-type antenna is used, the service capacity can be increased by the number of sectors, and thus, the capacity can be increased at a low cost, thereby achieving economic benefits.

Claims (7)

A relay apparatus for relaying a signal of a base station providing a mobile communication service as a service frequency signal to a shadow area by using a multi-directional sector type antenna, The microwave repeater installed on the base station side First to nth forward frequency converters for converting service frequency signals transmitted from the base station into first to nth frequency signals; A synthesizer for synthesizing the outputs of the first to nth forward frequency converter and converting the microwave frequency signal into a microwave frequency signal; Transmitting and receiving means for transmitting the output of the synthesizer through a microwave antenna and receiving a microwave frequency signal from the microwave antenna; A distribution unit converting the microwave frequency signal received from the transmission / reception means into first to nth frequency signals and distributing the signal; And A first to n-th reverse frequency converter converting the first to n-th frequency signals received from the distribution unit into a service frequency signal, The microwave repeater installed in the shadow area A distribution unit which receives the microwave frequency signal transmitted by the microwave repeater at the base station and converts the microwave frequency signal into first to nth frequency signals and distributes the first frequency signal; First to n-th forward frequency converters that receive the first to n-th frequency signals from the distribution unit and convert them into service frequency signals; First to nth transmission / reception means for transmitting base station first service frequency signals inputted from the first to nth forward frequency converters to a corresponding sector antenna; First to n-th reverse frequency converters for converting service frequency signals inputted from the first to nth transmitting and receiving means into first to nth frequency signals; And And a synthesizer for synthesizing the outputs of the first to nth reverse frequency converters and converting the outputs into microwave frequency signals. 2. The apparatus of claim 1, wherein the forward frequency converter comprises a first mixer for mixing the service frequency signal with a local oscillation signal and converting the service frequency signal into an intermediate frequency signal, and a high selection for selecting a desired signal band at an output of the first mixer. A band pass filter, an amplifier for amplifying the output of the high selectivity band pass filter, and a second mixer for converting the intermediate frequency signal output of the amplifier into local oscillation signals and converting them into first to nth frequency signals And a high frequency pass filter for suppressing noise at the output of the second mixer and passing only the first to nth frequency signals. 3. The repeater of claim 2, wherein the forward frequency converter further comprises a low noise amplifier for amplifying a service frequency signal input. 3. The repeater of claim 2, wherein the forward frequency converter further comprises an amplifier for amplifying the output of the high frequency pass filter. 3. The microwave frequency band of claim 2, wherein the microwave repeater further comprises a reference clock generator for providing a reference clock signal or a reference oscillator to the local oscillator, the synthesizer and the distribution unit for system synchronization. Repeater for multi-directional sector type mobile communication service. The multi-directional sector type using a microwave frequency band according to claim 1, wherein the transmitting and receiving means comprises a high output amplifier for amplifying the output of the synthesizer at a high output and a low noise amplifier for amplifying a signal received from the antenna. Repeater for mobile service. The multi-directional sector type movement using the microwave frequency band according to claim 1, wherein the service frequency signal input from or output to the base station is coupled on a transceiver feed line of the base station or on a relay dedicated link of the base station. Repeater for communication services.