KR20010019849A - Frequency conversion relay system in series type - Google Patents

Abstract

PURPOSE: A series-type frequency conversion relay system is provided to reduce the cost for facilities and easily add repeaters by installing one base station and several simple repeaters in serial. CONSTITUTION: A ling repeater(200) and a service repeater(400) frequency-converts service signals(TF1,TF3,...,TFn)(RF1,RF3,...,RFn) between a base station and a subscriber terminal into relay signals(Tf2,Tf4,...,Tfm)(Rf2,Rf4,...,Rfm) of a band which is not used in a real service within service-permitted frequency band, or performs reverse conversion. Frequency reproduction service and link relay elements(310,330) receive forward or backward direction relay signals(Tf2,Tf4,...,Tfm)(Rf2,Rf4,...,Rfm) which are not used in the real service and divided the signals into two or more, reproduce the one as service signals(TF1,TF3,...,TFn)(RF1,RF3,...,RFn) between the base station and the subscriber terminal for relaying to the subscriber terminal of service-possible area, and reproduce the other as the relay signals(tf21,tf41,...,tfp)(rf21,rf41,...,rfp) of the band different from the service signals(Tf2,Tf4,...,Tfm)(Rf2,Rf4,...,Rfm).

Description

Frequency conversion relay system in series type

The present invention relates to a relay system for converting a signal transmitted from a base station into an unused frequency band among the licensed frequency bands and relaying it with a subscriber station. Particularly, a link repeater and a service repeater are used to relay a base station and a subscriber station. A frequency conversion service for converting a repeating signal into a second relay signal distinguished from the frequency reproduction service and the link relay at the same time, a serial frequency conversion relay system capable of high-power relay from the base station to the remote service repeater It is about.

The present invention is a patent registration No. 144208 "mobile communication high power repeater" is improved, the patent is a mobile communication high power repeater when the mobile enters the radio shading area relayed to a new frequency through the frequency conversion without intermodulation It was to provide a relay service with excellent call quality. In addition, the conventional relay output is fed back to the input side oscillation and interference occurs, the cross-modulation characteristics are poor, the problem that the output is not increased.

However, the repeater has to be installed in parallel with the base station and the repeater, and accordingly to relay to a distance of several tens to hundreds of kilometers apart, additional base stations had to be additionally installed, which has the disadvantage of increasing the facility cost.

Accordingly, the present invention is to solve the above problems, the frequency reproduction service and link relay means for relaying the base station and the subscriber station using a relay signal of another frequency band that is distinct from the relay signal used by the link repeater and the service repeater The present invention provides a serial frequency conversion relay system capable of relaying a high power between a base station and a remote subscriber station by installing a predetermined number in series.

The present apparatus for achieving the above object is to service the forward service signal (TF1, TF3, ..., TFn) transmitted from the base station to the subscriber station or the reverse service signal (RF1, RF3, ..., RFn) transmitted from the subscriber station to the base station Link repeater which forwards or reverses relay between base station and subscriber station by converting frequency into relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) of band not used for actual service within licensed frequency band And a service repeater comprising: forward or reverse relay signals (Tf2, Tf4, ..., Tfm) (Rf2, Rf4, ..., not used for the actual service, between the link repeater and the service repeater). Rfm) is received and distributed in two, one of which is reproduced as a service signal (TF1, TF3, ..., TFn) (RF1, RF3, ..., RFn) between the base station and the subscriber station subscriber in the serviceable area. Relay to another terminal, and another one of the relay signals tf21, tf41, ..., tfp (rf21) separated from the relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) (rf21) and a frequency reproducing service and a link relay means for converting the frequency into rf41, ..., rfp.

1 is an overall configuration diagram of a serial frequency conversion relay system according to the present invention.

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

100: base station 110,320,340,410: subscriber station

200: link repeater 300: simple repeater

310, 330: frequency reproduction service and link relay means

400: service repeater

TF1, TF3,... , TFn: Forward service signal

RF1, RF3,... RFn: Reverse Service Signal

Tf2, Tf4,... , Tfm, tf21, tf41,... , tfp: forward relay signal

Rf2, Rf4,... , Rfm, rf21, rf41,... , rfp: reverse relay signal

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

1 is an overall configuration diagram of a serial frequency conversion relay system according to the present invention. Here, a case of a relay system having two simple repeaters will be described as an example.

Referring to FIG. 1, the serial frequency conversion relay system according to the present invention is a service licensed frequency between the base station 100 and the subscriber station service signal (TF1, TF3, ..., TFn) (RF1, RF3, ..., RFn) The link repeater 200 and the service repeater 400 which frequency-convert or inversely convert the relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) of the band not used for the actual service within the band. It includes a simple repeating means 300, which enables the high-power relay using a second relay signal of a different frequency band that is different from the relay signal used by the link repeater and the service repeater to relay even to a long distance . At this time, the simple relay means 300 transmits the forward or reverse relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) transmitted from the link repeater and the service repeater, but are not used for the actual service. Receive and distribute two (e.g., divide the size of the relay signal into two or more), one of which is a service signal (TF1, TF3, ..., TFn) between the base station and the subscriber station (RF1, RF3, ..., RFn) and relayed to a subscriber station in a serviceable area, and another one is relayed in another frequency band separated from the relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm). A first frequency reproducing service and link relay means 310 and a second frequency reproducing service and link having the same form as the signals tf21, tf41, ..., tfp (fr21, rf41, ..., rfp) It may be configured as a relay means 330, they are at least two in series You can install dozens, even hundreds of Km to Km to install.

At this time, the frequency reproduction service and link relay means 310, 330 are distinguished from the forward or reverse relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) used by the link repeater and the service repeater. In other words, the relay signals tf21, tf41, ..., tfp (rf21, rf41, ..., rfp) of another frequency band in the frequency band not used for actual service in the service licensed frequency band are used.

In addition, the frequency reproduction service and the link relay means (310) (330) by setting each frequency conversion band to a constant one band, by selecting only one frequency band from the frequency band serviced by the base station to the subscriber station It is possible to use

The serial frequency conversion relay system configured as described above is as follows. Service signals TF1, TF3, ..., TFn (RF1, RF3, ..., RFn) transmitted by the base station 100 serving analog and digital mobile communication (GSM, TDMA, CDMA, etc.) or transmitted by the mobile terminal Respectively passes through the link repeater 200 and the service repeater 400, and the repeater signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) of bands not used for actual service within the service licensed frequency band ) Is converted into frequency and transmitted to the simple relay means 300 several tens of kilometers away therefrom.

At this time, in the frequency reproduction service and the link repeater 310 and 330, the relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) received from the link repeater 200 or the service repeater 400, respectively. Divide 2 into 2 signals. One of the distributed signals is reproduced as a service signal (TF1, TF3, ..., TFn) (RF1, RF3, ..., RFn) between the base station and the subscriber station, and amplified by high frequency high power, and each of the subscriber stations 320 is capable of serving each other. Send to 340. The other one of the divided signals is another relay signal of a frequency band not used within the service licensed frequency band, that is, the relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm). Frequency conversion into another frequency band relay signal tf21, tf41, ..., tfp (rf21, rf41, ..., rfp) separated from the do. For example, in the case of the first frequency reproduction service and the link relay means 310, the second frequency reproduction service and the link relay means 330 installed at a distance of several tens of kilometers from the first frequency reproduction service and the link relay means 310. 330 transmits to the first frequency reproduction service and link relay means 310 installed at a distance of several tens of kilometers.

Therefore, the simple repeater 300 receives a signal relayed by the link repeater and the service repeater between the link repeater 200 and the service repeater 400, respectively, divides the signals and divides them, and reproduces one of the divided signals to generate a high frequency signal. After amplifying the high power, the serviceable subscriber station 340 frequency converts the other one of the distributed signals into another relay signal distinguished from the relay signals of the link repeater and the service repeater, and amplifies the high frequency high power, and then the service repeater ( 400, or to the link repeater 200.

At this time, the frequency reproduction service and link relay means 310, 330 are distinguished from the forward or reverse relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) used by the link repeater and the service repeater. That is, by using the relay signals tf21, tf41, ..., tfp (rf21, rf41, ..., rfp) of another frequency band in a frequency band not used for actual service within the service licensed frequency band, The service between the base station and the subscriber station due to the high power is possible, and the interference by the antenna feedback can be eliminated.

In addition, the frequency reproduction service and the link relay means (310) (330) by setting each frequency conversion band to a constant one band, by selecting only one frequency band from the frequency band serviced by the base station to the subscriber station By making it possible to use, it is possible to have an advantage in securing a transmission channel between the base station and the subscriber station.

As described above, the base station 100 and the subscriber station 320, 340, 410 can be relayed in both directions, and by adding a simple repeater 300 in series between the link repeater 200 and the service repeater 400, several hundred Km from the base station 100. It will be easy to expand even when relaying to remote areas.

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 conventional repeater had to be installed in parallel for a long distance relay, but the serial frequency conversion repeater system according to the present invention installs only one base station and adds a plurality of simple repeaters in series to configure the facility cost It can greatly reduce and the addition of repeaters is easy.

In addition, each repeater eliminates interference due to antenna feedback by adopting a method of converting a frequency band into an unused frequency band within a service-licensed frequency band.

Claims (4)

Forward service signals (TF1, TF3, ..., TFn) transmitted from the base station to the subscriber station or reverse service signals (RF1, RF3, ..., RFn) transmitted from the subscriber station to the base station are used for the actual service within the licensed frequency band. In a relay system including a link repeater and a service repeater for performing a frequency conversion into a relay signal (Tf2, Tf4, ..., Tfm) (Rf2, Rf4, ..., Rfm) in a band not forwarded and forward or reverse relaying between a base station and a subscriber station. In Between the link repeater and the service repeater, forward and reverse relay signals Tf2, Tf4, ..., Tfm (Rf2, Rf4, ..., Rfm) not used for the actual service are received and divided, and among them, One reproduces the service signals TF1, TF3, ..., TFn (RF1, RF3, ..., RFn) between the base station and the subscriber station and relays them to the subscriber station in the serviceable area. The other is the relay signals Tf2, Tf4. Frequency retransmission by frequency conversion by the relay signals tf21, tf41, ..., tfp (rf21, rf41, ..., rfp) of another frequency band which are different from Rfm2, Rf4, ..., Rfm A serial frequency conversion relay system comprising a service and a link relay means. The serial frequency conversion relay system according to claim 1, wherein at least two frequency reproduction service and link relay means are provided in series. The relay signal (tf21, tf41, ..., tfp) of another frequency band distinguished from the relay signals (Tf2, Tf4, ..., Tfm) (Rf2, Rf4, ..., Rfm) (rf21, rf41). ,…, Rfp) A serial frequency conversion relay system, characterized in that the frequency band is not used for the actual service within the service licensed frequency band. The relay signal (tf21, tf41, ..., tfp) of another frequency band distinguished from the relay signals (Tf2, Tf4, ..., Tfm) (Rf2, Rf4, ..., Rfm) (rf21, rf41). ,…, Rfp) And only one frequency band selected from the frequency bands transmitted from the base station to the subscriber station is used.