JPH05292084A - Communication device at beyond vision - Google Patents

Abstract

PURPOSE:To make it possible to improve a line storage rate by increasing the transmission capacity at the time of the constituting a bypass line. CONSTITUTION:A monitoring and controlling part 70 performs the line storage for a bypass line based on the reception electric field level of the bypass line to be detected from a radio part 50 when a line fault occurs. A line switching part 40 performs the line storage based on a transmission capacity control signal. The radio part 50 performs transmissions and receptions via the bypass line at the transmission speed set based on the transmission capacity control signal. A multiple processing part 30 performs a multiple separation based on a transfer capacity control signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a non-line-of-sight communication device of variable transmission capacity for wireless communication. In particular, the present invention relates to a variable transmission capacity type non-line-of-sight communication device that communicates between points that are optically out-of-line at frequencies of ultra-high frequencies or higher.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing cumulative distribution data of a received input electric field level in non-line-of-sight communication.

Conventionally, the non-line-of-sight communication device has a fixed transmission capacity in the wireless section. As shown in FIG. 3, generally, in Japan, the received input electric field has a characteristic of showing a long-period change in which the received input electric field becomes high in the summer and decreases in the winter. In conventional line-of-sight communication design, the system gain is generally determined so as to satisfy the required quality even at the time of the worst propagation conditions throughout the year. For this reason, a high level of the received input electric field is obtained at the time when the propagation state is relatively good, but the present situation is that it is not effectively used.

[0004]

However, in such a conventional non-line-of-sight communication device, the transmission capacity is restricted due to the characteristics of radio wave propagation, and a small capacity is unavoidable.
In a line configuration networked by a non-line-of-sight communication device, when a certain line becomes an obstacle and forms a detour, the capacity of the detour destination line is low and there is a problem that it is restricted.

The present invention solves the above problems.
It is an object of the present invention to provide a non-line-of-sight communication device capable of improving the line accommodation rate according to the line quality state of a detour destination when a failure occurs in a networked line due to non-line-of-sight communication and the line is accommodated in a detour line.

[0006]

According to the present invention, one input / output is connected to each of a plurality of terminals to demultiplex the transmission / reception data of the plurality of terminals, and the other input of the door gun separation section. A line switching unit that connects one input / output to the output and switches to a bypass line in the case of a line failure, and a radio unit including a transmission unit and a reception unit that are connected corresponding to the other input / output of the line switching unit, respectively. In the non-line-of-sight communication device including the multiplex processing unit, the line switching unit, and the monitoring control unit that controls the wireless unit, the monitoring control unit is detected by the receiving unit when a line failure occurs. The line switching unit includes means for outputting a transmission capacity control signal based on a received input electric field level of the detour line, the line switching unit includes a unit for accommodating a line in the detour line based on the transmission capacity control signal, and the radio unit is Including means for transmitting and receiving via the bypass line at the set transmission rate based on the transmission capacity control signals, the multiplexing processing unit is characterized in that it comprises a means for performing the demultiplexing based on the transmission capacity control signal.

[0007]

The monitoring control unit outputs the transmission capacity control signal based on the received input electric field level of the bypass line detected by the receiving unit when a line failure occurs. The line switching unit accommodates the line in the detour line based on the transmission capacity control signal. The wireless unit transmits and receives via the bypass line at the transmission rate set based on the transmission capacity control signal. The multiplexing processing unit performs demultiplexing based on the transmission capacity control signal.

As described above, when a failure occurs in a networked line due to non-line-of-sight communication and the line is accommodated in the detour line, the line accommodation rate can be improved according to the line quality state of the detour destination.

[0009]

Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, the non-line-of-sight communication device includes a multiplex processing unit 30 having one input / output connected to each of a plurality of terminals 10 and 20 for demultiplexing transmission / reception data of the multiple terminals, and a multiplex processing unit 30. A line switching unit 40 is connected to the other input / output to switch to a bypass line in the case of a line failure, and a transmission unit and a reception unit connected corresponding to the other input / output of the line switching unit 40. Radio section 5 including
0, an antenna 60 connected to the wireless unit 50, and a supervisory control unit 70 that controls the multiplex processing unit 30, the line switching unit 40, and the wireless unit 50, and the transmitting unit of the wireless unit 50 is a staff multiplexer. 51, modulator 52, transmission frequency converter 53
And a high power amplifier 54, the receiving section of the radio section 50 includes a low noise amplifier 55, a reception frequency converter 56, a demodulator 57 and a destuffing separator 58, and the radio section 50 includes a variable data rate oscillator 59. ..

A feature of the present invention is that the monitor control unit 70 outputs a transmission capacity control signal based on the received input electric field level of the bypass line detected by the receiving unit when a line failure occurs. The line switching unit 40 includes means for accommodating a line in the detour line based on the transmission capacity control signal, and the radio unit 50 transmits the line at the transmission rate set based on the transmission capacity control signal via the detour line. The multiplex processing unit 30 includes means for performing transmission / reception, and means for performing demultiplexing based on the transmission capacity control signal.

The operation of the non-line-of-sight communication device having such a configuration will be described. FIG. 2 is a block diagram of a non-line-of-sight communication system to which the non-line-of-sight communication device of the present invention is applied.

In FIG. 1, when an attempt is made to construct a detour line due to a failure of an arbitrary line that constitutes the network, a transmission capacity that can be set according to the state of the received input electric field level monitored by the monitor control unit 70. The monitoring control unit 70 controls the wireless unit 50 so that At this time, a plurality of signals increased on the transmission side are multiplexed and modulated by the clock frequency by the variable data rate variable oscillator 59 that is variable according to the newly set data rate. After this, frequency conversion, amplification, and transmission of radio waves are performed. At the same time, the receiving side also demodulates based on the same clock frequency and separates the multiplexed signal. Further, regarding the configuration of turning to the detour destination line, the monitoring control unit 70 also controls the line switching unit 40 at the same time.

In FIG. 2, when a failure occurs between the A station and the B station, the signal to be transmitted between the A station and the B station is A
Transmission is performed via station ← → station E ← → station D ← → station C ← → station B. At this time, the transmission capacity of the bypass line is newly set within an allowable range depending on the state of the line quality.

As described above, in this embodiment, the transmission capacity in the wireless section can be varied while the system gain remains unchanged at the time when a high level reception input electric field is obtained by long-period fading. When an arbitrary line networked by non-line-of-sight communication becomes an obstacle and accommodates the line to the detour destination, the accommodation rate can be improved according to the line quality state of the detour destination.

Further, if expressed quantitatively, if the received input electric field level (median value) is increased by 3 dB, the doubled capacity can be transmitted. Therefore, as shown in FIG. Considering that the fluctuation is generally several tens of dB, there is a considerable period in which an effect can be expected.

[0017]

As described above, the present invention improves the line accommodation rate according to the line quality state of the detour destination when the networked line fails due to the non-line-of-sight communication and is accommodated in the detour line. There is an excellent effect.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a non-line-of-sight communication device according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a non-line-of-sight communication system to which the non-line-of-sight communication device of the present invention is applied.

FIG. 3 is a diagram showing cumulative distribution data of electric field levels received by non-line-of-sight communication.

[Explanation of symbols]

 10 Telephone Terminal 20 Data Terminal 30, MUX Multiplexing Section 40, TS Line Switching Section 50, TR Radio Section 51 Stuff Multiplexer (STAFF MUX) 52 Modulator (MOD) 53 Transmission Frequency Converter (U / C) 54 High Power Amplifier (PA) 55 Low Noise Amplifier (LNA) 56 Reception Frequency Converter (D / C) 57 Demodulator (DEM) 58 Destuff Separator (DE STAFF MUX) 59 Data Rate Variable Oscillator 60 Antenna 61 Antenna Sharing Device 70, SV monitoring controller A to E stations

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04L 1/22 4101-5K

Claims (1)

[Claims] 1. A multiplex processing unit for connecting one input / output to a plurality of terminals, respectively, for demultiplexing transmission / reception data of the plurality of terminals, and one input / output connected to the other input / output of the multiplex processing unit. A line switching unit for switching to a bypass line in the case of a line failure, a radio unit including a transmitting unit and a receiving unit connected corresponding to the other input / output of the line switching unit, the multiplex processing unit, and the line switching In a non-line-of-sight communication device including a monitoring unit and a monitoring control unit that controls the radio unit, the monitoring control unit is based on a received input electric field level of a bypass line detected by the receiving unit when a line failure occurs. Means for outputting a transmission capacity control signal, the line switching unit includes means for accommodating a line in the detour line based on the transmission capacity control signal, and the radio unit based on the transmission capacity control signal. A non-line-of-sight communication device including means for transmitting and receiving via the bypass line at a set transmission speed, and the multiplexing processing unit including means for performing demultiplexing based on the transmission capacity control signal.