JP3160162B2 - Multiplex radio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a microwave band multiplex radio apparatus for constructing a trunk line and a branch line public communication network.

A multiplex radio system generally includes a modulation unit for superimposing a baseband signal from a carrier terminal unit constructing a public communication network with a multiplex radio device on an intermediate frequency band signal, and a modulation unit for converting the intermediate frequency band modulated signal. A transmitting unit that converts the signal to a desired radio frequency and supplies a signal to the antenna as a microwave, a receiving unit that receives a radio wave radiated into space and converts the signal to an intermediate frequency band, and a signal that is supplied from the receiving unit. A transmission / reception device configured to include a demodulation unit that demodulates the modulated signal in the intermediate frequency band to return to the original baseband signal, and that corresponds to the number of the plurality of allocated radio frequencies; A line switching unit for switching one backup transmission line provided for the working wireless transmission line according to the state of the transmission line, and a switching device including the line control unit; Transmission and reception apparatus and constituted by a monitoring apparatus for displaying information by monitoring the state of the switching device.

For this reason, the hardware is generally large. Therefore, in consideration of space saving, heat dispersion, and improvement of operability, various structures are considered.

[0004]

2. Description of the Related Art FIG. 7 is a schematic block diagram of a conventional multiplex radio apparatus. In the multiplex radio apparatus shown in this figure, a transmission / reception apparatus 10, a modulation / demodulation apparatus 11, and a monitoring control apparatus 12 are independent, and each is housed in a separate housing or rack.

[0005] As shown in FIG.
And the modem device 11 are connected by a modem signal line, and the transmission / reception device 10 and the monitoring control device 12 are connected by a control line and a monitoring line.
The modulation / demodulation device 11 and the monitoring control device 12 are connected by a control line and a monitoring line. Also, a modulation / demodulation signal line is connected from the modulation / demodulation device 11 to a transmission device (not shown), and a transmission / reception signal line is connected from the transmission / reception device 10 to an antenna (not shown).

[0006]

By the way, in the above-mentioned conventional multiplex radio apparatus, since the main functions constituting the apparatus are housed in separate housings, the installation space of the whole apparatus is large, At times, each device must be individually fixed and wiring between the devices must be performed. For this reason, there has been a problem that the installation work is complicated and a long work period is required.

In addition, since the required functions are distributed to the respective devices, the operation locations are also distributed to the respective devices. Therefore, there has been a problem that erroneous operations and processing delays are caused particularly in emergency such as failure processing.

Particularly, in a transmitting / receiving apparatus, when a transmitting / receiving section, a modulating section, and a demodulating section are housed in a common casing, the manufacturing procedure of the transmitting / receiving section is significantly longer than that of other parts. At the time of a test for confirming the entirety, manufacturing and waiting of the transmission / reception unit often occurred, resulting in a process delay.

There are various examples in which a transmission / reception device, a modulation / demodulation device, and a monitoring control device are housed in one housing for further space saving. A new problem has arisen due to losses and the like.

[0010] The present invention has been made in view of such a point, and it is possible to reduce the heat rise and the power loss of the demultiplexer while accommodating the transmission / reception device, the modulation / demodulation device, and the monitoring and control device in one housing. Control, to increase the mounting efficiency as much as possible, and to prevent the delay of the whole process due to the manufacturing delay of the transmitting and receiving part in the manufacturing process,
When the apparatus is installed, the installation work is not complicated, and when the initial radio frequency arrangement is an interleaved arrangement (described in an embodiment described later), the co-channel arrangement is easily performed after the installation (described in an embodiment described later). The purpose of the present invention is to provide a multiplex radio apparatus that can be changed to (1).

[0011]

FIG. 1 shows the principle of a multiplex radio apparatus according to the present invention. The multiplex radio apparatus shown in this figure has an (n + 1) radio standby switching function including one standby transmission system for a plurality of active transmission systems, and modulates an input baseband signal to convert it to an intermediate frequency signal. Part 101;
A transmitter 102 that converts an intermediate frequency signal from the modulator 101 to a radio frequency signal and supplies the radio frequency signal to the antenna, and a receiver 10 that receives the radio frequency signal and converts the signal to an intermediate frequency signal
3, a demodulation unit 104 for demodulating the intermediate frequency signal from the reception unit 103 and converting it to a baseband signal, a demultiplexing unit 105 for separating a desired radio frequency from an allocated radio frequency, and a working transmission system. A line switching unit 106 for switching lines between the standby transmission systems, a line control unit 107 for monitoring the lines and controlling a switching operation of the line switching unit 106 according to the monitoring state, and a monitoring of the state of the device And a monitoring function unit 108 for performing display. A feature of the present invention is that the transmission unit 10 of the transmission system that performs transmission and reception with the same polarization.
2, receiving section 103, modulating section 101, demodulating section 104, demultiplexing section 105, line switching section 106, and line control section 107
And the monitoring function unit 108 are housed in one housing 109,
A transmitting unit 102, a receiving unit 103, and a demultiplexing unit 105 whose components are different according to the selected radio frequency are arranged at the upper part, and the modulation unit 1 whose components do not change according to the radio frequency.
01, demodulation unit 104, line switching unit 106, line control unit 1
07 and the monitoring function unit 108 are separately arranged at the lower part.

Further, the transmitting units 110 to 112 and 13 of all of the plurality of active transmission systems and the standby transmission system are vertically arranged at the uppermost part of the housing 109, and are disposed below or behind the disposed transmitting unit 102. The demultiplexing unit 105 is disposed in
117 and 118 below the transmitting unit 102 or the demultiplexing unit 105
, And a radio frequency signal output terminal of the transmission unit 102 and a radio frequency signal input terminal of the reception unit 103 are provided on the front side of the housing 109, and the transmission unit 102 and the reception It is preferable that the connection end to the unit 103 be provided at a position where the connection end is shortest when the transmission unit 102 and the reception unit 103 are connected. It is preferably provided on the front side of 109.

Also, among the (n + 1) wireless standby switching functions, 1+
Modulation sections 121, 122 and demodulation sections 123, 1 of the first working transmission system and the protection transmission system constituting one radio standby switching function.
24, the line switching unit 106, the line control unit 107, and the monitoring function unit 108 are preferably connected by one motherboard.

Further, it is preferable to provide a connection end of the demultiplexing unit 105 with an extension device for changing the radio frequency arrangement from the interleaved arrangement to the co-channel arrangement on a surface near the demultiplexing unit 105 in the housing 109. preferable.

[0015]

According to the present invention described above, the transmission system (transmitter 102, receiver 103, modulator 10
1, demodulation section 104, demultiplexing section 105) and line switching section 10
6, the line control unit 107, and the monitoring function unit 108 are mounted (accommodated) in one housing 109, so that the number of installed devices is reduced and the conventional complicated wiring between devices can be reduced. .

Further, the demultiplexing unit 105 can be integrally configured in the apparatus, and the transmitting unit 102, the receiving unit 103, and the demultiplexing unit 105
Are arranged in the upper part, and the modulation unit 101, the demodulation unit 104, the line switching unit 106, the line control unit 107, and the monitoring function unit 108
Are arranged separately in the lower part, so that when the system is tested in the manufacturing process, it is arranged in the lower part even if there is no transmitting unit 102, the receiving unit 103, the demultiplexing unit 105 and the actual radio wave transmission / reception is not performed. Most of the testing of the system is possible only with the functions described.

The transmitting unit 102, which is the site that generates the most heat
By vertically disposing them at the top of the device housing, heat can be dissipated without affecting the temperature of other parts.

The demultiplexing unit 105 includes the transmitting unit 102 and the receiving unit 10
3, the connection between the transmitter 102 and the demultiplexer 105 and the connection between the receiver 103 and the demultiplexer 105 can be minimized. The connection between the filters (demultiplexing unit 105) can be minimized, and the device loss from the transmission unit 102 to the reception unit 103 facing the transmission unit 102 can be further reduced.

By providing a hole in the side wall of the housing near the position where the branching unit 105 is arranged, the connection of the branching unit 105 to the co-channel expansion device can be facilitated.

[0020]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram of a digital multiplex radio apparatus according to one embodiment of the present invention, FIG. 3 is an internal configuration diagram of the digital multiplex radio apparatus according to one embodiment, and FIG. FIG. 5 is a diagram showing the structure and connection of the transmitting unit, and FIG. 5 shows the initial interleave arrangement in the digital multiplex radio apparatus according to one embodiment.
FIG. 6 is a front view of a digital multiplex radio apparatus according to an embodiment, and FIG. 7 is a diagram for explaining a configuration of a conventional digital multiplex radio apparatus. However, in FIGS. 2 to 7, the same reference numerals are given to the respective drawings and the same portions as those in FIG. 1.

First, the function of the digital multiplex radio apparatus will be described with reference to FIG. This digital multiplex radio apparatus has first to third working transmission circuits indicated by reference numerals 22, 23, and 24, and a standby transmission system circuit indicated by reference numeral.

Each of the transmission systems 21 to 24 has the same configuration, that is, a line switching unit indicated by reference numerals 25, 26, 27, and 28; a modulation unit indicated by reference numerals 29, 30, 31, and 32;
Demodulation units indicated by 4, 35, 36, codes 37, 38, 39,
Transmitters (Tx1 to 4) denoted by 40, reference numerals 41, 42, 4
Having receiving units (Rx1 to 4) indicated by 3 and 44,
A transmitting side demultiplexer (TBPF) in a demultiplexer indicated by reference numeral 45
1 to 4) and receiving-side demultiplexers (RBPFs 1 to 4). The demultiplexer 45 has an antenna duplexer (DuP) shared by the transmission systems 21 to 24.

Each of the line switching units 25 to 28 includes a transmission-side switch (TSW1 to 4) and a reception-side switch (RSW).
W1 to 4), and the modulators 29 to 32 are bipolar
Unipolar converter (BU-1 to 4) and modulator (MOD)
1 to 4), and the demodulation units 33 to 36 include a unipolar / bipolar converter (UB-1 to 4) and a demodulator (DEM1).
To 4).

Reference numeral 55 denotes a line control unit, 56 denotes a monitoring function unit, and 57 denotes a power supply unit, which are shared by the transmission systems 21 to 24. In such a configuration, a baseband signal (bipolar signal) transmitted from a carrier terminal device (not shown) is converted to a unipolar signal by the BU via the TSW.

The converted unipolar signal is subjected to multilevel QAM modulation by MOD, superimposed on a radio frequency by Tx, and transmitted to the demultiplexer 45. Then, the TBPF of the demultiplexer 45
, Unnecessary signal components generated in the process of the transmission system up to Tx are removed, and thereafter transmitted from an antenna (not shown) to the partner station via DuP.

The received wave from the partner station is input to the demultiplexing unit 45 via the antenna, separated into a receiving path by the DuP of the demultiplexing unit 45, and the RBPF converts a received signal of a desired frequency from a plurality of received frequency signals. Is extracted. The extracted signal is sent to Rx, amplified to a required level, and
Demodulated by M.

The demodulated unipolar signal is represented by a UB
Is converted to a bipolar signal and sent to the carrier terminal device via the RSW. If a failure occurs such that the line is interrupted in the current transmission system (any of 22 to 24),
The T of the line switching units 26 to 28 is controlled by the line control unit 55.
When the SW and the RSW are operated, the transmission-side baseband signal from the active carrier terminal equipment and the reception-side baseband signal from the UB flow to the standby transmission system 21.

The monitoring function unit 56 plays a role of monitoring the line quality, the failure state of the equipment, and the like, and the power supply unit 57 supplies power to each unit. The configuration of the present embodiment in which a multiplex radio apparatus having such a function is accommodated in one housing so that the conventional problem can be solved will be described with reference to FIG.

In FIG. 3, reference numeral 61 denotes a housing for housing the multiplex radio apparatus. At the top of the housing 61, the transmission units (TX1 to T1) of the standby transmission system and the first to third working transmission systems are provided.
X4) are arranged vertically, and a branching unit 4
5 are arranged.

Below the branching unit 45, receiving units (RX1 to RX4) of the standby transmission system and the first to third working transmission systems are vertically arranged. This corresponds to the upper portion of the housing 61.

Below the RX1 to RX4, a line control unit 5 is provided.
5 and a monitoring function unit 56 are arranged side by side, and demodulators (DEMs) of the standby transmission system and the first active transmission system are arranged below the side.
1, DEM2), bipolar / unipolar converter (B-
U1, BU2), unipolar / bipolar converter (U
-B1, U-B2), modulators (MOD1, MOD2),
Power supply unit (PS) 57, transmission-side selector switch (TSW1,
TSW2) and the receiving side changeover switches (RSW1, RSW)
2) are arranged side by side from the outside to the inside of the housing 61 in the order described.

Below these, demodulators (DEM3, DEM4) of the second working transmission system and the third working transmission system, bipolar-unipolar converters (BU3, BU4),
Unipolar / bipolar converter (UB-3, UB)
4), modulator (MOD3, MOD4), power supply (PS)
57, the transmission-side changeover switches (TSW3, TSW4) and the reception-side changeover switches (RSW3, RSW4) are arranged side by side from the outside to the inside of the housing 61 in this order.

In the above arrangement, TX1 to TX4 and R
Since there is a feature in the configuration in which X1 to X4 are connected by the demultiplexer (BPF) of the demultiplexer 45, this will be described with reference to FIG. In FIG. 4, reference numeral 63 denotes an antenna duplexer connected to an antenna (not shown), and reference numeral 64 denotes an antenna duplexer connected to a space diversity antenna (not shown). Each of the antenna duplexers 63 and 64 is a coaxial cable 6
5,66 connected to the BPF
They are also connected by a coaxial cable 67.

Each of the TX1 to TX4 and the RX1 to RX4 is provided with a radio frequency signal input / output terminal, which is a feature of the present invention, on the front surface of the housing 61 as indicated by reference numerals 68, 69, and 70. The BPF is also provided on the front surface of the housing 61 as indicated by reference numerals 71, 72 and 73, and the signal output end 68 of the TX1 and the signal input end 71 of the BPF are connected by a coaxial cable 74. RX1 signal input terminal 69 and BPF
Is connected to a signal input terminal 70 of the RX 4 and a signal input terminal 73 of the BPF by a coaxial cable 76.

In such a configuration, connection with a coaxial cable is easy and can be performed in the shortest time. In addition,
The radio frequency signal passing through the coaxial cable 74 is for one channel (CH). In this way, the signals for one channel output from each of the TX1 to TX4 are collected, and the coaxial cable 65 connected to the antenna duplexer 63 is connected. The signal of 4CH passes. The opposite is true in RX1 to RX4, and signals for 4CHs passing through the coaxial cable 66 connected to the antenna duplexer 64 are distributed to each of the RX1 to RX4 by 1CH.

Next, a configuration for expanding from an initial interleave arrangement to a co-channel arrangement, which is another characteristic of the present invention, will be described with reference to FIG. H in the upper part of FIG.
As shown by (horizontal radio wave) and V (vertical radio wave), the H and V radio waves are 90 degrees out of phase. 1 to 8 shown side by side in H and V represent radio frequency channels.

Ps above and below 1CH indicate standby radio waves, and M1 to M7 above and below 2CH to 8CH indicate current radio waves. The co-channel arrangement uses the discrimination degree because the phases of the H and V radio waves are shifted by 90 degrees as described above, and the radio waves of the same frequency are independent as shown by M1 to M7 in the upper and lower parts of the figure. Used to increase the number of channels.

The interleaved arrangement means that the radio wave is
4, lower M1, upper M5, lower M2... Are used alternately in a toothless manner. A feature for performing the extension from the initial interleave arrangement to the co-channel arrangement is that an extension device (Additional Co-chann) surrounded by a dashed-dotted line 81 is provided on the side surface of the housing 61 near the branching unit 45.
el Operation part) is provided with a connection port indicated by ●.

Initial interleave arrangement (Initial Interleave)
In the case of (ave Operation), the extension device 81 is not connected to the connection port, but is connected to the paths indicated by broken lines 78, 79, and 80.

When this is added to the co-channel arrangement, the path indicated by broken lines 78, 79, and 80 may be removed, and the portion surrounded by the dashed line may be connected to the connection port. Therefore, the co-channel arrangement can be easily added.

FIG. 6 shows an external view of the multiplex radio apparatus. That is, in FIG. 6, a portion indicated by TX corresponds to a portion in which TX1 to 4 and the demultiplexing unit 45 illustrated in FIG. 3 are accommodated, a portion indicated by RX is a portion in which RX1 to 4 are accommodated, and C
The part indicated by OM (SEM) is a part in which the line control unit 55 and the monitoring function unit 56 are accommodated, and the part indicated by MD-SW is D.
EM1-4, BU1-4, UB1-4, MOD1
4, PS57, TSW1-4, and RSW1-4.

[0042]

As described above, according to the present invention,
Suppressing heat rise and power loss of the demultiplexing unit while putting the transmitting and receiving device, modem and monitoring control device in one case,
There is an effect that mounting efficiency can be increased as much as possible.

Further, in the manufacturing process, the delay of the entire process due to the manufacturing delay of the transmission / reception unit is prevented, the installation work is not complicated when the apparatus is installed, and the co-channel arrangement can be easily performed after the installation when the initial radio frequency arrangement is the interleaved arrangement. There is an effect that can be changed.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a block diagram of a multiplex radio apparatus according to an embodiment of the present invention.

FIG. 3 is an internal configuration diagram of a multiplex radio apparatus according to an embodiment of the present invention.

FIG. 4 is a diagram showing the structure and connection of a demultiplexing unit and a transmitting unit in the multiplex radio apparatus according to one embodiment of the present invention.

FIG. 5 is a diagram for explaining an extension from an initial interleaved arrangement to a co-channel arrangement in a multiplex radio apparatus according to an embodiment of the present invention.

FIG. 6 is a front perspective view showing the appearance of the multiplex radio apparatus according to one embodiment of the present invention.

FIG. 7 is a block diagram of a conventional multiplex radio apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Modulation part 102 Transmission part 103 Reception part 104 Demodulation part 105 Demultiplexing part 106 Line switching part 107 Line control part 108 Monitoring function part 109 Housing 110 First working transmission system transmission part 111 Second working transmission system transmission part 112 Nth Active transmission system transmission unit 113 Standby transmission system transmission unit 115 First active transmission system reception unit 116 Second active transmission system reception unit 117 nth active transmission system reception unit 118 Standby transmission system reception unit 121 First active transmission system modulation unit 122 Standby transmission system modulator 123 First working transmission system demodulator 124 Standby transmission system demodulator

Claims (5)

(57) [Claims] A modulating unit for modulating an input baseband signal into an intermediate frequency signal, the modulating unit having an (n + 1) radio standby switching function including one standby transmission system for a plurality of active transmission systems; A transmitting unit that converts the intermediate frequency signal from the modulation unit to a radio frequency signal and supplies the radio frequency signal to the antenna, and a receiving unit that receives the radio frequency signal and converts the signal to an intermediate frequency signal,
A demodulator for demodulating the intermediate frequency signal from the receiver and converting it to a baseband signal; a demultiplexer for separating a desired radio frequency from an assigned radio frequency; A line switching unit that performs line switching in the above, a line control unit that monitors a line and controls a switching operation of the line switching unit according to the monitoring state, and a monitoring function unit that performs monitoring display of the state of the device. In the multiplex radio apparatus provided, the transmission unit, the reception unit, the modulation unit, the demodulation unit, the demultiplexing unit of the transmission system that performs transmission and reception with the same polarization, the line switching unit, the line control unit , The monitoring function unit is housed in one housing, and the transmitting unit, the receiving unit, and the demultiplexing unit whose components are different according to the selected radio frequency are arranged at the upper part, and according to the radio frequency. The modulation section, the demodulation of which A multiplex radio apparatus, wherein the unit, the line switching unit, the line control unit, and the monitoring function unit are separated and arranged below. 2. The transmission units of all of the plurality of active transmission systems and the standby transmission system are vertically arranged at the top of the housing, and the transmission units are disposed below or behind the arranged transmission units. A wave unit, the receiving unit is vertically arranged below the transmitting unit or below the branching unit, and a radio frequency signal output terminal of the transmitting unit and a radio frequency signal input terminal of the receiving unit. Is provided on the front side of the housing, and a radio frequency signal input / output end connected to the transmitting unit and the receiving unit of the branching unit is provided at a position which is shortest when the transmitting unit and the receiving unit are connected. The multiplex radio apparatus according to claim 1, wherein: 3. The multiplex radio apparatus according to claim 2, wherein a radio frequency signal input / output terminal connected to said transmitting section and said receiving section of said demultiplexing section is provided on a front side of said housing. 4. The 1 + 1 of the n + 1 wireless standby switching functions
(1) a first working transmission system and a modulation unit and a demodulation unit of the standby transmission system, which constitute a wireless standby switching function, and the line switching unit;
4. The multiplex radio apparatus according to claim 1, wherein said line control unit and said monitoring function unit are connected by one motherboard. 5. A connection end of the branching unit with an extension device for changing a radio frequency layout from an interleaved layout to a co-channel layout is provided on a surface near the branching unit in the housing. The multiplex radio apparatus according to any one of claims 1 to 4, wherein: