KR20010037537A - Repeater using frequency conversion switching - Google Patents

Abstract

PURPOSE: A repeater using frequency conversion switching is provided to provide a service in a hand-off interval while doing service the whole frequency channels transmitted from a base station by reproducing some of signals transmitted through the base station or a link repeater as a service channel, oscillating a frequency channel which is not repeated through the link repeater among frequency channels provided from the base station by using the remaining signals and transmitting it along with the reproduced signal to a subscriber terminal. CONSTITUTION: A link repeater(200) receives one or two of channel signals(transmission frequency channels) are indicated by TF1,TF3,TF5,TF6,...,TFn, and a receiving frequency channels are indicated as RF1,RF3,RF5,RF6,...,RFn) of a frequency band(F1,F3,F5,F6,...,Fn) provided from a base station(100) and converts them to a channel signals(TF2,TF4) which are not used by the base station(100) among the service-permitted frequency channels. A channel selecting and oscillating unit(330) detects information of a channel that a subscriber terminal is currently receiving a relay service from a channel signal (TF2 or TF4) inputted from the link repeater to the service repeater, selectively oscillates channel signals(TF5,TF6,...,TFn) of a specific frequency band according to the detected channel information, and providing it together with the channel signal (TF2 or TF4) to the service repeater. A service repeater(300) amplifies the channel signal (TF2,TF4) transmitted through the link repeater(200), reproduces them to their original signals(TF1,TF3), amplifies the channel signals(TF5,TF6,...,TFn) provided from the channel selecting and oscillating unit(330) and transmits them with the reproduced signals(TF1,TF3) to the subscriber terminals(401,402)(411,412,413).

Description

Repeater using frequency-conversion switching {REPEATER USING FREQUENCY CONVERSION SWITCHING}

The present invention relates to a repeater using a frequency conversion switching, and in particular, some of the signals transmitted through the base station or link repeater is reproduced as a service channel, and relays through the link repeater among the frequency channels serviced by the base station using the remaining signals The present invention relates to a relay system capable of oscillating a frequency channel not transmitted and transmitting the reproduced signal to a subscriber station and serving the entire frequency channel transmitted from a base station without service interruption in the hand-off section.

The frequency conversion repeater is composed of a base station, a subscriber station, a link repeater and a service repeater for relaying the same. The link repeater receives the signal transmitted from the base station, converts the frequency, and transmits the signal to the service repeater. The service repeater reproduces the signal transmitted from the link repeater and transmits the signal to the subscriber station or, conversely, converts the signal transmitted from the subscriber station to the link repeater.

At this time, the base station transmits the frequency of F1, F3, F5, F6, F7, ..., Fn (n; natural number) to the link repeater, but it can provide the service area through the link repeater and the service repeater. The frequency channels were limited to two (F1, F3) and the remaining frequencies F5, F6, ..., Fn were out of service. For example, only two channels could be relayed because the F1 and F3 frequencies were converted from the link repeater to F2 and F4, and they were reproduced by the service repeater as the original signal.

As a result, not only the frequency channel that can be provided in the service area is significantly reduced, but also there is a problem that the service is not efficiently used and the service is disconnected.

Therefore, there is a need for the development of a repeater using frequency conversion switching that can serve the subscriber station in the entire frequency channel transmitted from the base station.

Accordingly, the present invention is to solve the above problems, a relay system using a frequency conversion switching capable of relaying the subscriber station without service interruption in the handoff period, and at the same time can service the entire subscriber station of the frequency channel transmitted from the base station And an optical relay system.

One embodiment of the present invention for achieving the above object, in the relay system including a link repeater and a service repeater for performing a relay service between the base station and the subscriber station in the shadow area, out of the link repeater From the channel signal (F2 or F4) input to the service repeater, the subscriber station detects the information of the channel currently being relayed, and selectively oscillates the channel signal of a specific frequency band according to the detected channel information. In addition to the F2 or F4 provides a relay system using a frequency conversion switching characterized in that it comprises a channel selection oscillation means provided to the service repeater.

Another embodiment of the present invention for achieving the above object is an optical relay system including a service repeater for performing the optical relay service directly through the optical / electrical conversion means and the electrical / optical conversion means between the base station and the subscriber station; And detecting information on a channel currently being relayed by the subscriber station from the channel signal F2 or F4, which is output from the base station and input to the service repeater through the electric / optical conversion means. And a channel selection oscillating means for selectively oscillating a channel signal of a specific frequency band and providing the channel signal with the channel signal F2 or F4 to the service repeater. do.

In each embodiment of the present invention, the channel selection oscillation means includes: a high frequency oscillator for generating channel signals of a plurality of specific frequency bands according to a predetermined value; Detecting the channel information that the subscriber station is currently receiving relay service from the channel signal (F2 or F4), and selectively outputs only the channel signal of a specific frequency band by switching the output of the high frequency oscillator at high speed according to the detected channel information. A high speed switching signal outputting; An amplifying splitter which amplifies a predetermined level by amplifying a channel signal F2 or F4 transmitted from the link repeater and input to the service repeater, and provides the divided partial signal to an input of the fast switching signal unit; ; The apparatus may further include a combiner for combining the channel signal of a specific frequency band output from the high speed switching signal with the channel signal F2 or F4 and inputting the same to the service repeater.

1 is an overall configuration diagram of a relay system using frequency conversion switching according to the present invention;

2 is an exemplary configuration diagram of channel selection oscillation means connected to the service repeater of FIG.

3 is a diagram illustrating some components of an optical relay system according to another exemplary embodiment of the present invention.

<Description of the code | symbol about the principal part of drawings>

100: base station 200: link repeater

300: service repeater 110,401-413: subscriber terminal

305; Electric / optical conversion means 330: channel selection oscillation means

331 amplification divider 332 high speed switching signal

333: high frequency oscillator 334: combiner

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

1 is an overall configuration diagram of a relay system using frequency transform switching according to the present invention. Referring to FIG. 1, a relay system using frequency transform switching according to the present invention is provided for a base station 100 and a shadow area subscriber station. Link repeater 200, service repeater 300 and channel selection oscillation means 330 is included.

As shown in the figure, the channel signals of the frequency bands F1, F3, F5, F6, ..., Fn serviced by the base station 100 (in particular, the transmission frequency channels are TF1, TF3, TF5, TF6, ... , TFn, and the reception frequency channel is one or two channel signals (TF1, TF3 or RF1, RF3) of RF1, RF3, RF5, RF6, ..., RFn; A link repeater 200 which receives the case of TF3 and converts the received channel signals into channel signals TF2 and TF4 which are not used by the base station 100 among the frequency channels authorized for service; From the channel signal TF2 or TF4 coming out of the link repeater, the subscriber station detects information of a channel currently being relayed by the subscriber station, and according to the detected channel information, the channel signal TF5 of a specific frequency band. Channel selection oscillation means (330) for selectively oscillating, TF6, ..., TFn and providing the channel signal (TF2 or TF4) to the service repeater; Amplify the channel signals TF2 and TF4 transmitted through the link repeater 200 to reproduce the original signals TF1 and TF3, and provide the channel signals TF5, TF6,... And a service repeater 300 for amplifying and transmitting TFn to the subscriber station 401, 402, 411, 412, 413, together with the reproduced signals TF1, TF3.

FIG. 2 is a block diagram illustrating a configuration example of the channel selection oscillation means 330 connected to the service repeater 300 of FIG. 1, wherein the channel selection oscillation means includes an amplifying divider 331 and a high frequency oscillator 333. ), A high speed switching signal 332 and a combiner 334.

Referring to FIG. 2, in order for the channel selection oscillator 330 to be connected to the service repeater 300 as shown in FIG. 1, the channel select oscillator 330 may amplify and distribute the channel signals TF2 and TF4 transmitted from the link repeater 200. Amplification divider 331 is required. The amplifying splitter 331 amplifies the channel signals TF2 and TF4 to a predetermined level, divides the amplified signals by N again (as shown in FIG. 2 for example), and one of them is a service relay 300. Branch to the channel selection oscillation means.

In addition, the channel selection oscillator 330 is a high frequency oscillator 333 for generating a plurality of oscillation frequencies of a specific frequency band by a predetermined value according to channel signals serviced by a base station, and the subscriber station is present from the channel signal. And a high speed switching signal 332 for detecting channel information receiving relay service and selectively outputting only a channel signal of a specific frequency band by switching the output of the high frequency oscillator at high speed according to the detected channel information. The apparatus may further include a combiner 334 for combining the channel signal of a specific frequency band output from the fast switching signal with the channel signal transmitted from the link repeater and inputting the channel signal to the service repeater.

In this case, the high frequency oscillator may be configured to generate only channel signals F5, F6, ..., Fn in a frequency band serviced by the base station but not relayed through the link repeater and the service repeater. It is desirable to have the same number of oscillation bands as the number of transmission channels in the frequency band serviced by the base station.

In addition, the fast switching beacon is selected from the channel signals (F5, F6, ..., Fn), and switching only the channel signal of the specific frequency band serviced by the base station according to the detected channel information, the selection switching operation It is desirable to alternately perform the operation repeatedly to achieve continuous transmission.

Referring to the operation of the relay system configured as described above is as follows.

The frequency channels of signals transmitted from the base station 100 to the link repeater 200 through the antenna or the subscriber station 110 around the base station are TF1, TF3, TF5, TF6, ..., TFn (n: natural number). . The antenna of the link repeater 200 receives a TF1 or TF3 channel among these frequency channels and converts it to a link frequency (frequency channel not used by the base station 100 within the service frequency band, here TF2 or TF4). , One or two of TF2 or TF4 are simultaneously transmitted to the service repeater 300 through the antenna.

The service repeater 300 receives TF2 and TF4 transmitted from the link repeater 200 through an antenna, and at this time, the amplifying distributor 331 distributes the transmitted signal. Some of the divided signals reproduce the TF1 and TF3 transmitted from the base station by the service repeater 300.

The remaining signal is then input to the fast switching signal 332. The fast switching signal 332 detects information on the channel currently being serviced by the subscriber station from the remaining signals, and rapidly repeats a plurality of oscillation frequencies of a specific frequency band oscillated according to a predetermined value in the high frequency oscillator 333. Switch. Therefore, in the fast switching signal 332, the oscillation frequencies of the high frequency oscillator 333 are switched at high speed using the channel signal transmitted from the link repeater, and the continuous channel signals TF5, TF6, ..., TFn are switched by the switching operation. ) Is output to the combiner 334.

The channel signals TF5, TF6,..., TFn input to the combiner 334 are combined with the signals TF1, TF3 reproduced by the service repeater 300, and then amplified by a high frequency high output to the subscriber station 401 through an antenna. 402, 411, 412, and 413, respectively.

In addition, when the service relay 300 relays the service with a small output, that is, the subscriber terminal is located in an area capable of providing a high quality relay service, and thus the relay service is performed using only the service relay 300 without using a link relay. In order to reduce the interference between the repeaters, the service repeater 300 receives the TF1 and TF3 signals directly from the base station 100 without going through the link repeater 200 and goes through the above process to the subscriber stations 401 and 402. Relay.

Then, the subscriber station 401, 402 receiving the relay service on the fixed frequency channel receives the service on the F1 or F3 channel. In addition, subscriber stations 411 and 412 and 413 moving from the service area of the other base station to the service area of the base station 100 are initially relayed on F1 or F3 or F5, F6, F7, ..., Fn frequency channels. Receive service. Then, when the base station 100 and the other base station passes through a service area, i.e., a handoff period, the terminals 411, 412, and 413 are among F5, F6, F7, ..., Fn, not F1 or F3. You will be served on either channel.

If it is assumed that the terminal moving from the other base station to the base station 100 receives the service on the channel of F5, the terminal moving to the base station 100 has a weak signal strength from the other base station and the channel selection oscillation means ( It is recognized that the signal strength of the same F5 channel emitted by 330 is strong. In this case, the terminals 411, 412, and 413 transmit data of the pilot signal of the F5 channel emitted by the switching unit (base station information of 100, that is, PN number, location, channel number and FA number, etc.) to another base station. . Upon receiving this data, the other base station makes a handoff request to the base station 100 through the switch network, and at the same time, the terminals 411, 412, and 413 channel F1 or F3 being used by the base station 100. Command to change

At this time, the terminal moves to the channel F1 or F3 momentarily and handoff is successfully performed without disconnection of the call.

The channel selection oscillation means 330 adjusts the output frequency of the channel selection oscillation means 330 in the same manner as the frequency variation and the quantity transmitted from the base station 100. In addition, the amplifying distributor 331 and the combiner 334 may be further inserted into the service repeater 300 which does not have the same.

3 is a block diagram of an optical repeater according to another embodiment of the present invention.

In the case of a service repeater using an optical cable, the base station 100 includes a first optical / electric conversion means 105, and converts and transmits the signal transmitted to the service repeater 300 into an optical signal. The photoelectric conversion service is performed in the same manner as described above, except that the transmitted signal is photoelectrically converted again by the second electrical / light conversion means 305 of the service repeater 300.

The repeater according to the present invention is a repeater applicable to other similar wired and wireless communication equipment.

The present invention is not limited by the embodiments described above, and various changes and modifications can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

As described above, the frequency conversion switching repeater according to the present invention can serve the subscriber station the entire frequency channel transmitted from the base station. In addition, the repeater does not have a selective switching unit can be additionally inserted into the repeater that does not have it by using a distributor and a combiner, and thus it is possible to reduce the installation cost by using a repeater currently installed.

Claims (11)

In a relay system comprising a link repeater and a service repeater for performing a relay service between a base station and a subscriber station in a shadow area, The subscriber station detects information of a channel currently being relayed by the subscriber terminal from the channel signal (F2 or F4) exiting the link repeater and inputs the service repeater, and outputs a channel signal of a specific frequency band according to the detected channel information. And a channel selection oscillating means for selectively oscillating and providing the channel signal (F2 or F4) to the service repeater. The method of claim 1, wherein the channel selection oscillation means, A high frequency oscillator for generating channel signals of a plurality of specific frequency bands according to a predetermined value; Detecting the channel information that the subscriber station is currently receiving relay service from the channel signal (F2 or F4), and selectively outputs only the channel signal of a specific frequency band by switching the output of the high frequency oscillator at high speed according to the detected channel information. Relay system using a frequency conversion switching characterized in that it comprises a high-speed switching signal to output. The method of claim 2, wherein the channel selection oscillation means, An amplifying splitter which amplifies a predetermined level by amplifying a channel signal F2 or F4 transmitted from the link repeater and input to the service repeater, and provides the divided partial signal to an input of the fast switching signal unit; ; And a combiner for combining the channel signal of a specific frequency band output from the fast switching signal with the channel signal (F2 or F4) and inputting the same to the service repeater. The method of claim 2, wherein the high frequency oscillator, And generating only channel signals (F5, F6, ..., Fn) in a frequency band served by the base station but not relayed through the link repeater and the service repeater. The method of claim 4, wherein the fast switching signal, Among the channel signals F5, F6, ..., Fn, only the channel signal of a specific frequency band serviced by the base station is selected and switched according to the detected channel information, and the selected switching operation is repeatedly executed to continuously change the channel signal. Relay system using frequency conversion switching, characterized in that the transmission is switched. The relay system of claim 1, wherein the service repeater directly receives a channel signal transmitted from the base station, and performs a relay service without passing through the link repeater. An optical relay system comprising a service repeater for directly performing an optical relay service through an optical / electric conversion means and an electrical / optical conversion means between a base station and a subscriber station, Detects information of a channel currently being relayed by the subscriber station from the channel signal F2 or F4, which is output from the base station and input to the service repeater through the electric / optical conversion means, and identifies the channel according to the detected channel information. And a channel selection oscillating means for selectively oscillating a channel signal in a frequency band and providing the channel signal with the channel signal (F2 or F4) to the service repeater. The method of claim 7, wherein the channel selection oscillation means, A high frequency oscillator for generating channel signals of a plurality of specific frequency bands according to a predetermined value; Detecting the channel information that the subscriber station is currently receiving relay service from the channel signal (F2 or F4), and selectively outputs only the channel signal of a specific frequency band by switching the output of the high frequency oscillator at high speed according to the detected channel information. Optical relay system using a frequency conversion switching characterized in that it comprises a high-speed switching signal to output. The method of claim 8, wherein the channel selection oscillation means, An amplifying splitter which amplifies a predetermined level by amplifying a channel signal F2 or F4 transmitted from the link repeater and input to the service repeater, and provides the divided partial signal to an input of the fast switching signal unit; ; And a combiner for combining a channel signal of a specific frequency band output from the fast switching signal with the channel signal (F2 or F4) and inputting the same to the service repeater. The method of claim 8, wherein the high frequency oscillator, And generating only channel signals (F5, F6, ..., Fn) in a frequency band served by the base station but not relayed through the link repeater and the service repeater. The method of claim 10, wherein the fast switching signal, Among the channel signals F5, F6, ..., Fn, only the channel signal of a specific frequency band serviced by the base station is selected and switched according to the detected channel information, and the selected switching operation is repeatedly executed to continuously change the channel signal. An optical relay system using frequency conversion switching, characterized in that the transmission is switched.