KR20040073707A - A Frequency Band Convertable Relay For Mobile Communication - Google Patents

Abstract

PURPOSE: A repeater of converting a frequency band for mobile communication is provided to convert entire cellular or PCS frequency bands into IMT2000 frequency bands, and to reproduce the converted frequency bands, thereby performing simultaneous calls between plural mobile communication subscribers. CONSTITUTION: When a signal flow is in forward direction, a transceiving device(210) for a base station service separates a signal into a base station signal and a repeater signal, delivers the base station signal to a base station service area by encoding/modulating the signal, and outputs one of the signals for the repeater. And when the signal flow is in reverse direction, the transceiving demodulates/decodes a signal received from the base station service area as demodulating/decoding a signal inputted from a repeater to synthesize the signals, and transmits the synthesized signals to a switching center. A transceiving device(230) for a repeater link converts a portion or entire cellular or PCS base station frequency bands into IMT2000 frequency bands in forward direction, converts IMT2000 frequency band signals into cellular or PCS frequency band signals, and transmits the converted signals in reverse direction. When the signal flow is in forward direction, a repeater for a shade area service converts/reproduces the IMT2000 frequency bands into cellular or PCS base station frequency bands which the base station operates to deliver the bands to a shade area.

Description

Frequency band converting relay for mobile communication {A Frequency Band Convertable Relay For Mobile Communication}

The present invention relates to a mobile communication relay device, and more particularly, in a mobile communication service such as cellular, PCS, IMT 2000, and the like, by first converting a frequency band wirelessly to a remote shadow area and relaying the link, The present invention relates to a frequency band conversion repeater capable of serving a high power after a secondary conversion.

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. That is, the mobile communication system is composed of a base station controller, a plurality of base stations, etc. The base station divides the entire service area in units of cells, and is distributed to each cell, and the mobile communication subscribers in the coverage area that can serve them. Communicate wirelessly. At this time, the area where the call is impossible from the service area to the remote area by the building or tunnel in the city is called the 'shading area', and a repeater is installed to provide services in this shaded area.

However, in the conventional frequency conversion repeater, the PCS or cellular frequency bandwidth is converted into an unused frequency, the base station transmits the link from the base station to the shadow area repeater, and converts the frequency again to repeat the service. Due to this problem, many subscribers cannot be accommodated and converted into adjacent proximity frequencies, which causes interference between the service repeater link antenna and the service antenna, thereby making it impossible to make a good call.

In order to solve the above problems, the present invention converts and reproduces the entire cellular or PCS frequency band into the IMT 2000 frequency band, which is a frequency band that is spaced apart from each other. It is an object of the present invention to provide a frequency band conversion relay for mobile communication that can solve the problem, and can receive more subscribers than the existing repeater and can receive economic benefits by receiving more subscribers without frequency interference due to proximity frequency.

1 is a schematic diagram showing the configuration of a base station and repeater for a mobile communication according to the present invention;

2 is a block diagram showing a detailed configuration of the base station apparatus shown in FIG.

3 is a block diagram showing the detailed configuration of the shadow area service relay apparatus shown in FIG.

4 is an overall configuration diagram of another embodiment according to the present invention.

* Explanation of symbols for main parts of the drawings

10: switching center 20: base station apparatus

30: repeater for shadow area service 102: optical cable

104: optical cable 106: base station service area

108: base station area terminal

112: shadow area mobile communication terminal

110: shaded area service area

210: base station facility 211: mux / demux and distributor

212: base station service transceiver

213: high frequency high power transceiver

214: transceiver antenna for base station service 215: combiner

216-1 ~ 216-n: Transceiver transceiver 217: Switching machine

230: transceiver link transceiver 231: frequency band converter

232: controller 233: high power transceiver

234: transmitting and receiving antenna for repeater and link 235: AGC

236: modem for link communication

237: ultrafast data compensator

302: transmission and reception antenna for base station and link 304: transmission and reception antenna for repeater service

310: high frequency transceiver 320: frequency band converter

330: controller 331: high frequency output monitoring and regulator

332: radiant radiation monitor 333: separation monitor

334: AGC 335: modem

336: ultrafast data compensator 325: high frequency player

340: high frequency high power transceiver for relay service

In order to achieve the above objects, the apparatus of the present invention is provided with a switching station, a base station, and a repeater to provide a wireless mobile communication service in a base station service area or a shadow area service area. After separating the signal received from the signal for the base station and the repeater signal, the base station signal is encoded and modulated and sent to the base station service area, and selects one of the repeater signal or the signal for the base station for the repeater And a base station service transceiver for demodulating and decoding a signal received in a base station service area in a reverse direction, demodulating and decoding a signal input from a repeater side, and transmitting the demodulated signal to a switching station. Received relay cellular or PCS base station Converts part or all of the frequency band to IMT 2000 frequency band and transmits to shadowed repeater, and converts signal of IMT 2000 frequency band received from shaded repeater to cellular or PCS frequency band signal in reverse direction. Repeater link transceiver transmitted to the service transceiver and the IMT 2000 frequency band transmitted from the repeater link transceiver in the forward direction to the cellular or PCS frequency band operating in the base station and then transmitted to the shaded area In addition, in the reverse direction, the signal received from the subscriber station is converted to the IMT 2000 frequency band and transmitted to the repeater link transceiver, characterized in that it comprises a shadow area service repeater for enabling the service with the subscriber station in the shadow area.

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

First of all, the present invention converts cellular or PCS frequency bands into IMT 2000 frequency bands according to a method of transmitting a subscriber signal in a long shadow area in a mobile communication service such as cellular, PCS, IMT 2000, and then transmits them to a relay link. The first embodiment (FIG. 1) of frequency-converting to cellular or PCS frequency band again and converting the cellular or PCS frequency band to IMT 2000 frequency band and transmitting it to the relay link does not use some of the IMT 2000 frequency band. The following description will be made by dividing into a second embodiment (FIG. 4) capable of converting to another bandwidth and directly serving the IMT 2000 frequency band.

First embodiment

1 is a schematic diagram showing a configuration of a mobile communication network to which the present invention is applied, the mobile communication network being connected to an exchange station 10 including a mobile communication switch and a base station control and distributor, and a switch 10 and an optical cable 104. The base station service area 106 includes a plurality of base stations 20 for providing mobile communication services, and a shadow area service repeater 30 for providing mobile communication services in the shadow area service area 110.

Referring to FIG. 1, the base station control and distributor 102 transmits a communication signal input from a subscriber or a base station to a corresponding base station 20, and the base station 20 connected to the base station control and distributor 102 by an optical cable 104. These include a base station service transceiver 210 for providing a service in the base station service area 106, and a repeater link transceiver 230 for transmitting a communication signal to a repeater located in a remote shadow area. In this case, the repeater link transceiver 230 converts the cellular frequency band or the PCS frequency band of the base station into the entire frequency band of the IMT 2000 frequency bandwidth or the required frequency bandwidth and transmits the frequency band to the repeater 30 for the shadow area service.

The shadow area service repeater 30 converts the IMT 2000 frequency band received from the repeater link transceiver 230 of the base station into a cellular frequency band or a PCS frequency band, amplifies high frequency and high power, and then shades the area service area. Send to (110).

Accordingly, the terminal 112 located in the shadow area service area 110 passes through some components of the shadow area service repeater 30, the repeater link transceiver 230, and the base station service transceiver 102. The terminal 108 located in the base station service area 106 is connected to the base station control and distributor 102 through the base station service transceiver 210.

Here, the service frequency band is a base station transmission (downward) frequency band of approximately 869MHz ~ 880MHz band, the mobile station transmission (upward) frequency band of approximately 824MHz ~ 835MHz, personal 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, and the base station transmission (down) frequency band is approximately 2110 MHz to 2170 MHz. These frequency bands are only an example and may be changed according to the environment of each company and each country.

2 is a block diagram showing the detailed configuration of the base station shown in FIG.

Referring to FIG. 2, the base station 20 includes a base station service transceiver 210 and a repeater link transceiver 230, and the base station service transceiver 210 receives a signal received from an exchange station in a forward direction. The mux / demux and divider 211 which separates the base station signal and the repeater signal and synthesizes the base station signal and the repeater signal received in the reverse direction, and the forward mux / demux and divider 211 for the base station The base station service antenna 214 receives and encodes and demodulates a signal, and amplifies the output of the base station service transceiver 212 for demodulating and decoding the received signal in the reverse direction and the output of the base station service transceiver 212 in the forward direction to a high output. And a high frequency high power for low noise amplification of the signal received through the base station service antenna 214 in the reverse direction and transmitting the signal to the base station service transceiver 212. First to nth relay transceivers 216 which receive and encode demodulator signals from the receiver 213 and the mux / demux and divider 211 in the forward direction, and demodulate and decode the received signals in the reverse direction. -1 to 216-n, a combiner 215 for coupling the signal of the high frequency high output transceiver 213 to the repeater side, and an output of the combiner 215 or the first to nth relay transceivers 216-1 to 216-n), which selects one of the outputs. In this case, separate link frequency band conversion repeaters may be connected to the second to nth relay transceivers 216-2 to 216-n to install and service the same type of service repeaters in many shaded areas. In this case, if there are few subscribers for shadow area service, it transfers to the “a” of the transfer machine and relays some of the base station services. If there are many subscribers, it transfers the service to “b” of the transfer machine regardless of the number of subscribers of the base station service. It is a device that enables relaying to many subscribers regardless of base station call volume by using repeater dedicated (216-2 ~ 216-n).

In addition, the repeater link transceiver 230 converts the cellular or PCS frequency band signal received from the base station service transceiver 210 in the forward direction into an IMT 2000 frequency band signal, and in the reverse direction, converts the IMT 2000 frequency band signal into a cellular or A frequency band converter 231 for converting to a PCS frequency band signal, a controller 232 for passing the forward and reverse signals as they are, and inserting and withdrawing a control signal to the corresponding signal to perform control, and a forward controller 232. Amplified and transmitted through the link antenna 234, and a high-power transceiver 233 for low-noise amplifying the signal received through the link antenna 234 in the reverse direction to the controller 232. In addition, the controller 232 compensates for the AGC 235 and the link communication modem 236 for automatically adjusting and stabilizing a signal, and compensates for phase noise and time delay in the case of high-speed data communication. The high speed data compensator 237 is connected to enable the relaying of a good EVDO service. Here, EVDO is a packet wireless data transmission technology developed by Qualcomm using CDMA technology as a high speed data transmission (HDR). According to this technology, transmission speeds of up to 2.4 Mbps in the forward direction and 9 to 307.2 Kbps in the reverse direction are possible.

3 is a block diagram showing a detailed configuration of the relay device shown in FIG.

Referring to FIG. 3, the shadow area service repeater 30 amplifies a low noise signal received from the base station 20 through the link antenna 302 in the forward direction, and amplifies the signal input in the reverse direction to a high output for link use. A high frequency transceiver 310 for transmitting to the base station 20 through the antenna 302, a frequency band converter 320 for converting an IMT 2000 frequency band signal amplified by the high frequency transceiver 310 into a cellular or PCS frequency band signal, and a frequency. Frequency regenerator 325 for regeneration, controller 330 which passes the forward and reverse signals as it is, and controls by inserting and withdrawing various control signals, and amplifies the output of controller 330 in the forward direction to high output and shades it. Relay to the local service antenna 304, and outputs to the controller 330 by low noise amplification of the subscriber signal received from the shadow area service antenna 304 in the reverse direction It is composed of a high frequency high power transceiver 340 for service. At this time, the controller 330 is connected to the high frequency output monitoring and regulator 331, the unnecessary radiation radiation monitoring 332, the separation monitor 333, AGC 334, modem 335, ultra-fast data compensator 336 is connected. .

Subsequently, the entire operation according to the first embodiment will be described by dividing the forward operation transferred from the base station to the subscriber side and the reverse direction transferred from the subscriber to the base station.

end. Signal flow in the forward direction

Many of the subscriber signals transmitted from the base station control and distributor 102 installed in the switching center 10 to the base station 20 via the optical cable 104 are transmitted to the MUX / DEMUX and the distributor 211 of the base station 20. ) Is divided into a signal for the base station service and a signal for the relay, and the signal for the base station service is distributed to the base station service transceiver 212, and the signal for the relay is transmitted to the first to nth relay transceiver 216-. 1 ~ 216-n).

The cellular (or PCS) base station service transceiver 212 encodes an input base station service signal and modulates it to be output to a high frequency high output transceiver.The high frequency high power transceiver 213 amplifies the input modulation signal to a high output. It transmits to the base station service area 106 via the antenna 214.

Meanwhile, the first relay transceiver n-th relay transceiver 216-1 to 216-n encodes and modulates a signal separated for relay, and transmits the signal to “b” of the switch 217. The base station service signal is transmitted to the "a" of the switcher 217 through the combiner 215, and the switcher 217 may relay a separate relay dedicated signal to "a" when relaying the base station service signal. In this case, "b" is selected to transmit the selected signal to the frequency band converter 231 of the transceiver link transceiver 230. In this case, when a separate relay link transceiver 230 is connected, a service can be performed even in a plurality of n shaded areas (that is, one base station can accommodate a plurality of repeaters).

The signal of the base station or the relay-only transceiving device selected by the switching unit 217 is converted by the frequency band converter 231 into a part of the cellular frequency band or the PCS frequency band signal, or the entire bandwidth, into an unused band of the IMT 2000 frequency bandwidth. do. At this time, the bandwidth may be variable.

The frequency band converted signal is transmitted from the link antenna 234 through the high frequency high power transceiver 233 after passing through the controller 232 and transmitted to the shadow area link antenna 302. At this time, the AGC 235 is employed as the controller 232, and the link communication is performed through the modem 236, and the EVDO service is enabled by inserting the high speed data compensator 237.

The IMT 2000 frequency band signal transmitted by the base station 20 and received by the link antenna 302 is frequency-converted by the frequency band converter 320 to the signal for the first base station service (ie, cellular or PCS frequency) and then high frequency. It is reproduced in the player 325. The signal reproduced by the high frequency regenerator 325 is passed through the controller 330 and then amplified by the high frequency high power transceiver 340 and propagated by the shaded area service antenna 304 to communicate with the shaded area mobile communication subscriber station 112. Enable communication In this case, the controller 330 monitors the magnitude of the service output signal with the high frequency output monitor and the regulator 331, adjusts the signal to an appropriate level, monitors the unnecessary radiation with the unnecessary radiation radiation monitor 332, and monitors the separation degree monitor ( 333) to monitor the separation between the relay link antenna and the service antenna. And automatically adjust gain using AGC 334, link communication with base station 20 via modem 335, phase noise or time delay in ultra-high speed data compensation device 336. To compensate for this and enable a more stable EVDO service.

I. Signal flow in the reverse direction

The terminal 112 and the shadow area service repeater 30 located in the shadow area service area 110 communicate in a cellular or PCS frequency band, and the transmission signal of the terminal 112 is a high frequency for a relay service through the service antenna 304. Is received by the high power transceiver 340. The subscriber signal received from the terminal 112 is converted into the IMT 2000 frequency band by the frequency band converter 320 through the controller 330 and the high frequency regenerator 325, and then amplified to a high power by the high power transceiver 310 for link use. It propagates to the base station 20 side via the antenna 302.

The signal received from the repeater 30 by the antenna 234 of the base station repeater link transceiver 230 is amplified by the high power transceiver 233 and then passed through the controller 232 to the PCS or cellular frequency at the frequency band converter 231. The frequency is converted into bands and transferred to the switch 217. The switcher 217 is demodulated and decoded in the base station service transceiver 212 or the relay transceiver 216-1 according to the position of the selected switch, and then synthesized in the mux / demux and distributor 211 to form an optical cable. It is communicated to the base station control and distributor 102 at the call exchange.

Meanwhile, the terminal 108 located in the base station service area 106 and the base station apparatus 20 communicate in a cellular or PCS frequency band. The transmission signal of the terminal 108 is transmitted through the base station service antenna 214 to the high frequency high power transceiver 213. And then amplified and decoded by the base station service transceiver 212, synthesized by the mux / demux and divider 211, and delivered to the base station control and distributor 102 of the switching center.

Second embodiment

4 is a view showing the overall configuration according to a second embodiment of the present invention.

In the second embodiment, the operation of the base station 20 is the same as that of the first embodiment, and the shadow area service repeater 50 uses the IMT 2000 frequency band signal received from the repeater link transceiver 230 of the base station. The band converter 320 converts some of the IMT 2000 frequency bandwidths into other unused bandwidths and outputs the IMT 2000 frequency bands as it is, and passes through the controller 330, the repeater service high frequency transceiver 340, and the service antenna 304. It is sent to the shadow area (110). In this case, the controller 330, the high frequency transceiver 340 for the repeater service, and the service antenna 304 are used to meet the IMT 2000 frequency band.

In the above embodiments, the cellular and PCS base stations have been described as an example, but the present invention is not limited to the above embodiments, and conversely, the IMT 2000 frequency band is converted into the PCS or cellular frequency band, or in the case of the IMT 2000 base station, IMT 2000. The present invention can be applied in various ways because it is possible to convert to a band not used among the frequency bands and relay and reproduce the service.

As described above, the present invention converts and regenerates the entire cellular or PCS frequency band so that many mobile communication subscribers can talk simultaneously, eliminating traffic jams, and can accommodate many subscribers. More than twice as many subscribers (e.g., seven times) can be accommodated, resulting in significant economic benefits. In addition, there is an effect of preventing and reducing the call quality due to interference by separating and converting the frequency band far away.

Claims (9)

An apparatus provided with a base station and a repeater to provide a wireless mobile communication service in a base station service area or a shadow area service area, In the forward direction, the signal transmitted from the switching center through the optical cable is separated into a signal for a base station and a signal for a repeater, and then the signal for the base station is encoded and modulated and sent to the base station service area, and one of the signal for the repeater or the signal for the base station is selected. A base station service transceiver for demodulating and decoding a signal received in a base station service area in a reverse direction, demodulating and decoding a signal input from a repeater side, and transmitting the demodulated signal to a relay station; Partial or all of the relay cellular or PCS base station frequency band received from the base station service transceiver in the forward direction is converted to the IMT 2000 frequency band and transmitted to the relay in the shadow area, and received from the relay in the shadow area in the reverse direction. A repeater link transceiver for converting an IMT 2000 frequency band signal into a cellular or PCS frequency band signal and transmitting the signal to a base station service transceiver; And In the forward direction, the IMT 2000 frequency band transmitted from the repeater link transceiver is converted into cellular or PCS frequency band in operation at the base station and transmitted to the shaded area, and in the reverse direction, the signal received from the subscriber station is transmitted to the IMT 2000 frequency. And a shader service repeater for converting into a band and transmitting to the repeater link transmitting and receiving device to enable a service with a subscriber station in a shaded area. According to claim 1, wherein the base station service transceiver A mux / demux and divider for separating a signal received from the switching center in the forward direction into a signal for the base station and a repeater signal, and for synthesizing the signal for the base station and the repeater signal received in the reverse direction; A base station service transceiver for receiving and encoding a base station signal from the mux / demux and distributor in a forward direction, and demodulating and decoding a received signal in a reverse direction; A high frequency high power transceiver for amplifying an output of the base station service transceiver in a forward direction and transmitting the base station service antenna through a base station service antenna and a low noise amplifying signal received through the base station service antenna in a reverse direction; A first to n-th relay transceiver for receiving and encoding a demodulator signal from the mux / demux and splitter in the forward direction, and demodulating and decoding the received signal in the reverse direction; A combiner for coupling the signal of the high frequency high power transceiver to a repeater side; And Switching unit for selecting one of the output of the combiner or the output of the first to n-th relay transceiver The input of the link frequency band converter installed in the base station relays a part of the high frequency operated in the base station to the switch a, or when the service is saturated in the base station, a separate relay transceiver is installed in the base station and connected to the switch b. A frequency band conversion repeater for mobile communication, characterized in that it is possible to relay a large number of shadow area subscriber capacity irrespective of the base station service subscriber capacity. The transceiver of claim 2, wherein the base station service transceiver; And a separate link frequency band conversion repeater to the second to nth relay transceivers to install and service the same type of service repeaters in many shaded areas. The transmitter / receiver of claim 1, A frequency band converter converting the cellular or PCS frequency band signal received from the base station service transceiver in the forward direction into an IMT 2000 frequency band signal and converting the IMT 2000 frequency band signal into a cellular or PCS frequency band signal in the reverse direction; A controller which passes the forward signal and the reverse signal as it is, and inserts and withdraws a control signal to the corresponding signal to perform control; And Amplifying the output of the controller in the forward direction through the link antenna, and in the reverse direction of the high frequency transceiver for a low power amplification signal transmitted through the link antenna for transmission to the controller, characterized in that the mobile communication frequency band conversion Repeater. The repeater of claim 1, wherein the shadow area service repeater A high frequency transceiver for low noise amplifying a signal received from the base station through the link antenna in the forward direction, amplifying the input signal with a high output in the reverse direction, and transmitting the signal to the base station through the link antenna; A frequency band converter and player for converting and reproducing the IMT 2000 frequency band signal amplified by the high frequency transceiver into a cellular or PCS frequency band signal; A controller which passes the forward signal and the reverse signal as it is and inserts and draws various control signals to perform control; And And a high frequency high power transceiver for relay service for amplifying the output of the controller to a high output in the forward direction to the shadow area service antenna, and amplifying the subscriber signal received from the shadow area service antenna in the reverse direction to output to the controller. A frequency band conversion relay device for mobile communication. The repeater of claim 5, wherein the shadow area service repeater And inserting an unnecessary wave monitoring function into the controller so that the output can be adjusted so as not to affect other communications. The repeater link transceiver and the shadow area service repeater according to claim 4 or 5, And a stable relay is possible by inserting the AGC function into the controller. The repeater link transceiver and the shadow area service repeater according to claim 4 or 5, In the case of ultra high speed data communication, a high frequency data compensator is added to the controller to compensate for phase noise, time delay, and the like, so that a good EVDO service can be relayed. Repeater. The repeater of claim 1, wherein the shadow area service repeater A frequency band conversion relay device for mobile communication, characterized in that for converting the signal transmitted from the IMT 2000 frequency band conversion from the base station to the unused band of the IMT 2000 frequency band in the shadow area service repeater.