JP2002300072A - Transmitter-receiver for hf wireless channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter-receiver for an HF wireless channel that can automatically set a frequency and a transmission rate used by a transmission station side and a reception station side independently of an operator. SOLUTION: An automatic channel connection control means comprising an ALE section 23 and a receiving data processing part 25 in the transmitter- receiver for an HF wireless channel 100 sequentially uses any of available frequencies to transmit transmission data from transmission systems 21, 22 to an opposite station, receives a reply signal with the same frequency from the opposite station via reception systems 41-44, 241-244 and discriminates which frequency is most suitable for communication on the basis of the communication quality of the received signal. Furthermore, the automatic channel connection control means changes a transmission rate of the communication employing the most suitable frequency to set a fastest transmission rate capable of normal communication. Thus, the transmitter-receiver for an HF wireless channel can automatically conduct excellent communication with the proper frequency at the highest transfer rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception apparatus for an HF radio line, and more particularly, to a transmission / reception system having a transmission system and a reception system. The present invention relates to a transmission / reception device for an HF wireless line that transmits transmission data to a partner station.

[0002]

2. Description of the Related Art In order to perform data communication by wireless communication, a transmitting station and a receiving station which perform communication must secure an electric field strength equal to or higher than a specified level. It must be accurately demodulated. In an HF (short wave) wireless line used for such wireless communication, an optimum wireless frequency to be used differs depending on a distance between the two stations and a time zone in which communication is performed, or an S / N of a received signal at that time is different. different. Therefore,
In these cases, the modulation scheme, frequency, transmission rate, and the like that enable normal data transmission must be appropriately selected.
For this reason, conventionally, an operator with abundant experience and knowledge has manually set the optimum frequency and transmission rate on the transmitting station side and the receiving station side.

[0003]

In the above-mentioned conventional HF radio line transmission / reception device, an operator with abundant experience and knowledge is required to set the frequency and transmission speed used on the transmitting station side and the receiving station side. Although the optimum frequency and transmission rate are set manually, such human resources are valuable, and it is desired to execute these settings without depending on humans. In the field of digital audio, a method of wirelessly determining an optimal modulation method in a transmitting station and a receiving station is disclosed in Japanese Patent Application Laid-Open No. H11-266256. No method for setting the transmission rate is disclosed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and it is possible to automatically set a frequency and a transmission speed used by a transmitting station and a receiving station without an operator. It is an object of the present invention to provide a transmitting and receiving device for an HF wireless line.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention determines good conditions for transmission and reception between a transmission system, a plurality of reception systems, and a partner station. And an automatic line connection control means for transmitting transmission data to a partner station under the specified conditions, wherein the automatic line connection control means, when transmitting data, uses a plurality of frequencies to be used. Each is assigned to each of the plurality of reception systems, one of the plurality of frequencies is sequentially used as a transmission signal, and a response returned from the partner station at the same frequency as the transmission signal is received by the corresponding reception system. Determining a frequency having the best communication quality by judging a signal, determining the fastest transmission rate usable at that frequency, and transmitting transmission data to the partner station under the determined conditions. HF radio channel transceiver device.

According to such a configuration, in the transmitting / receiving apparatus for the HF radio line, the automatic line connection control means transmits the transmission data from the transmission system to the partner station by sequentially using one of the usable frequencies, and And receives a response returned at the same frequency from the receiving system via the receiving system, and determines which frequency is optimal for communication from the communication quality of the received signal. Also,
The automatic line connection control means changes the transmission speed of communication using the optimum frequency and sets the transmission speed to the highest transmission speed at which normal communication can be performed. For this reason, the HF radio line transmission / reception device can automatically perform good communication at the optimum frequency and the highest transmission speed.

In the embodiment of the present invention, H
The transmission / reception device 100 for the F radio line includes a transmission data processing unit 2
1, a transmission system including a modulation unit 22, and a transmission unit 30, and reception units 41, 42, to 44, and demodulation units 241, 242, to,
Automatic line connection control means for determining favorable conditions for transmission and reception between a plurality of reception systems comprising H.244 and a partner station, and transmitting transmission data from the data terminal 10 to the partner station under the determined conditions. And In this case, the automatic line connection control means includes a reception data processing unit 25 and an ALE unit 23. The ALE unit 23 allocates each of a plurality of frequencies to be used to each of a plurality of reception systems at the time of transmission. One of a plurality of frequencies is sequentially used as a transmission signal, a response returned from the partner station at the same frequency as the transmission signal is received by a corresponding reception system, and the reception signal is processed by a reception data processing unit 25, Further, the ALE section 23
Determines the frequency with the best communication quality by judging the result, performs communication with the changed transmission rate using that frequency, determines the fastest available transmission rate, and under the determined conditions Set to transmit the transmission data to the partner station.

The present invention also provides an automatic circuit for determining good conditions for transmission and reception between a transmission system, a reception system, and a partner station, and transmitting transmission data to the partner station under the determined conditions. A transmission / reception device for an HF radio line having connection control means, wherein the automatic line connection control means sets each of a plurality of frequencies to be used to a transmission system and a reception system during data transmission, and One of the frequencies is sequentially used as a transmission signal, a response returned from the partner station at the same frequency as the transmission signal is received by a reception system, the received signal is determined, and the best communication quality among a plurality of frequencies is determined. Is determined, the highest available transmission rate at that frequency is determined, and the transmission data is transmitted to the partner station under the determined conditions. Therefore, the same functions as those of the above-described invention can be achieved even if the number of reception systems is not a plurality.

Further, in the latter invention, the automatic line connection control means, when transmitting data, sets the transmission frequency switching timing to the number of times the frequency used to be used with respect to the reception frequency switching timing on the receiving side. Control to switch at the speed of. Therefore, time for determining the condition having the best communication quality can be effectively used.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the HF of the present invention.
FIG. 2 is a block diagram showing a first embodiment of a transmission / reception apparatus for a radio link, FIG. 2 is a block diagram showing a second embodiment of the present invention, and FIG. 3 is a time sequence for explaining the operation of FIG. FIG. In this case, the HF shown by FIG.
The transmission / reception device 100 for a wireless line includes a data terminal 10, a data communication unit 20, a transmission unit 30, a reception unit 41,
42,..., 4n. The data communication unit 20 includes a transmission data processing unit 21 and a modulation unit 2.
2 and ALE (Automatic Link Establishment) Department 23
, Demodulation sections 241, 242,..., 24n, and a reception data processing section 25. Here, in order to facilitate understanding, it is assumed that the number of reception units and demodulation units constituting a plurality of reception systems are four, respectively.
It is assumed that “n” is 4.

When the data to be transmitted is passed from the data terminal 10 on the data transmitting side to the data communication unit 20, the above-mentioned transmitting / receiving apparatus 100 for the HF radio line communicates with the partner station as described below. The determination of the optimal frequency and transmission rate is performed. That is, in the data communication unit 20, the transmission data processing unit 2
1 stores the data passed from the data terminal 10 and transfers the data to the modulation unit 22 in accordance with the transmission speed of the modulation unit 22. The modulating unit 22 transmits the setting signal CLA from the ALE unit 23 (in this case, the setting signal CLA is the modulation method that has the best characteristic with respect to S / N among the modulation methods held by the data communication unit 20). In accordance with the modulation method and the transmission rate set based on the transmission data rate, the digital data received from the transmission data processing unit 21 is subjected to a modulation process on an analog signal.

In the case described above, the ALE unit 23
At the same time, the setting signal CLB is supplied to the transmitting unit 30 to set one of the four different frequencies in order as the transmitting frequency. Also, the receiving units 41, 42, 4
3 and 44, the setting signals CC1 and CC
2, to CC4, and one of the four frequencies is set as a reception frequency. Demodulation unit 24
1, 242, 243 and 244 are set signals CD
1, CD2,..., CD4, and a modulation method and a transmission rate that are considered to have the best characteristics with respect to S / N are set as in the case of the modulation unit 22. The receiving unit of the partner station is also set in the same state as the transmitting side, and is in the receiving standby state.

As described above, the transmitting unit 30 on the transmitting side
According to the setting signal CLB from the ALE unit 23, one of four frequencies (corresponding to the number of receiving units) is sequentially instructed to the signal from the modulation unit 22, and the HF of the partner station is used by using the frequency. The transmission is performed to a transmission / reception device for a wireless line (not shown, for example, has the same configuration as that of FIG. 1). In this case, the other party's HF radio line transmitting / receiving apparatus is in a reception standby state, and its demodulation unit performs the above-described H
Similarly to the modulating unit 22 of the transmitting / receiving device 100 for the F radio line,
It is set so as to operate in accordance with the modulation scheme and the transmission rate which are considered to have the best S / N characteristics among the modulation schemes. As described above, the ALE unit 23 changes the transmission frequency and responds to the transmission by changing the transmission frequency.
It is determined whether or not a response from the transmission unit of the transmission / reception apparatus for a wireless line is received by the reception units 41, 42, to 44 of the corresponding reception frequency.

As a result of the judgment, the response unit 41,
If the received response signal is present in the demodulation units (e.g., the reception unit 42) that received the response among the demodulation units 241, 242,. By the demodulation unit 242) corresponding to the unit 42,
Extract quality information. Based on the extracted quality information,
The reception data processing unit 25 counts data errors and transfers the count information DA to the ALE unit 23. The ALE unit 23 that has received the information DA has the least error by using any of the four frequencies for transmission.
In addition, it is automatically determined whether the S / N ratio is good, the frequency is determined as the optimum frequency, the start of data transmission is notified to the receiving side, and the partner station executes the subsequent steps. Set to that frequency.

When the optimum frequency is determined (assuming that the frequency is handled by the receiving unit 41), the ALE unit 23
Sets the modulation scheme with the fastest transmission rate among the stored modulation schemes to the modulator 22 and the demodulator 241 (corresponding to the receiver 41) using the setting signal CLA (the same applies to the other station). After this setting, the transmitting side calls the partner station at the set highest transmission rate. The partner station returns a response if the reception is normal, and does not return a response otherwise. When the transmitting unit has received a response from the receiving unit 41,
Subsequent data transmission is performed under these conditions. However, if there is no response, the transmission rate is sequentially reduced by one step and the same is repeated, the response is determined to be the fastest transmission rate, and the partner station is also determined to that transmission rate. Data transmission. Therefore, data transmission and reception are automatically performed under the best conditions without the intervention of an operator.

Next, another embodiment will be described with reference to FIGS. 2 includes a data terminal 50, a data communication unit 60, a transmitting unit 70, and a receiving unit 80. Also, the data communication unit 60
Transmission data processing section 61, modulation section 62, ALE section 63
, A demodulation unit 64, and a reception data processing unit 65. Here, unlike the transmitting / receiving apparatus 100 for the HF radio line in FIG. 1, the receiving unit and the demodulating unit constituting the receiving system are one system. Even if there is only one receiving system,
The frequency handled by the receiving system is switched to four frequencies f1 to f4 by the setting signals ECC and EDD.

In the transmission / reception apparatus 200 for the HF radio line, when data to be transmitted is passed from the data terminal 50 on the data transmission side to the data communication unit 60, communication with the partner station is performed as described below. The determination of the optimal frequency and transmission rate is performed. That is, in the data communication unit 60, the transmission data processing unit 6
1 stores the data passed from the data terminal 50 and transfers the data to the modulation unit 62 in accordance with the transmission speed of the modulation unit 62. The modulation section 62 outputs the setting signal ELA from the ALE section 63 (in this case, the setting signal ELA is a modulation scheme which has the best characteristic with respect to S / N among the modulation schemes held by the data communication unit 60). In accordance with the modulation method and the transmission rate set based on the transmission data rate, the digital data received from the transmission data processing unit 61 is subjected to a modulation process on an analog signal.

In the above case, the ALE unit 63 outputs the setting signal E
At the same time as setting the modulation section 62 by LA, the transmission section 7
0, the setting signal ELB is given, and four different frequencies f1
To f4 are sequentially set as transmission frequencies. Further, a setting signal ECC is given to the receiving unit 80, and the same frequency as the transmission signal is set as a receiving frequency. A setting signal EDD is supplied to the demodulation unit 64, and a modulation method and a transmission rate that are considered to have the best S / N characteristics are set as in the modulation unit 62. The receiving unit of the partner station is also set in the same state as the transmitting side, and is in the receiving standby state. However, as shown in FIG. 3, the partner station sets any one of the reception frequencies (for example, time B1).
In the period set in f1), the transmitting side sets f1 in each of the periods A1 to A4 obtained by dividing the time B1 into four.
Transmission is performed at a frequency of f4.

As described above, the transmitting unit 70 on the transmitting side
According to the setting signal ELB from the ALE unit 63, the signal from the modulation unit 62 is sequentially instructed at one of four frequencies (corresponding to the number of receiving units), and the HF of the partner station is used by using the frequency. The transmission is performed to a transmission / reception device for a wireless line (not shown, for example, has the same configuration as that of FIG. 2). In this case, the other party's HF radio line transmitting / receiving apparatus is in a reception standby state, and its demodulation unit performs the above-described H
Similarly to the modulation unit 62 of the transmission / reception device 200 for the F radio line,
It is set so as to operate in accordance with the modulation scheme and the transmission rate which are considered to have the best S / N characteristics among the modulation schemes. The transmission frequency of the transmission side changes at four times the speed of the reception frequency setting of the reception side (see FIG. 3). As described above, the ALE unit 63 changes the transmission frequency and responds to the transmission by changing the transmission frequency.
It is determined whether or not the response from the transmitting unit of the transmitting / receiving device for the F wireless line has been received at the corresponding frequency.

If the result of the determination is that the response has a corresponding frequency, the quality information of the received response signal is extracted by the demodulation unit 64. The received data processing unit 65 counts data errors based on the extracted quality information, and transfers the count information FA to the ALE unit 63.
Upon receiving this information FA, the ALE unit 63 automatically determines which of the four frequencies, if any, is to be used for transmission and which has the least error and good S / N, and sets the frequency to the optimum frequency. And notifies the receiving side to start data transmission at this optimum frequency, and the partner station sets the execution of the subsequent steps to that frequency.

When the optimum frequency is determined, the ALE unit 63
Sets the modulation system with the highest transmission rate among the modulation units in the modulation unit 62 and the demodulation unit 64 using the setting signal ELA (the same applies to the other station). After this setting,
The transmitting side calls the partner station at the set highest transmission rate. The partner station returns a response if the reception is normal, and does not return a response otherwise. If there is a response, the transmitting side performs subsequent data transmission under this condition. However, if there is no response, the transmission rate is sequentially reduced by one step and the same is repeated, the response is determined to be the fastest transmission rate, and the partner station is also determined to that transmission rate. Data transmission / reception. Therefore, even if there is only one receiving system, data transmission / reception is automatically performed under the best conditions without the intervention of an operator. Further, in this case, since the receiving system can be implemented by one system, the cost is reduced and the occupied area is reduced. In the case of constructing a communication system as described above using such a transceiver for an HF radio line,
It may be performed by a combination of the one shown in FIG. 1 and the one shown in FIG. Further, in the configuration shown in FIG. 2, the frequency of switching the frequency is made faster on the transmitting side, but the frequency of switching may be made faster on the receiving side.

[0022]

According to the present invention, there is provided a transmitting / receiving apparatus for an HF radio line,
With the configuration as described above, the frequency and the transmission speed to be used can be automatically set to the optimum one without the intervention of the operator.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a transmission / reception apparatus for an HF radio line according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of the transmitting / receiving apparatus for an HF radio line according to the present invention.

FIG. 3 is a time sequence diagram for explaining an operation of the transmitting / receiving device for the HF radio line of FIG. 2;

[Explanation of symbols]

10, 50 data terminal, 20, 60 data communication unit, 21, 61 transmission data processing unit, 22, 62 modulation unit, 23, 63 ALE unit, 25, 65 reception data processing unit, 30, 70 transmission unit, 41 to 44 , 80 receiver, 64, 241-244 demodulator, 100, 200
Transmitter / receiver for HF wireless line.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K004 AA01 BA02 BB02 BB04 5K011 DA15 EA01 FA07 GA02 KA12 5K034 AA05 DD01 EE03 HH01 HH09 MM08

Claims (3)

[Claims] An automatic line connection control for determining good conditions for transmission and reception between a transmission system, a plurality of reception systems, and a partner station, and transmitting transmission data to the partner station under the determined conditions. Means for transmitting and receiving an HF wireless line, wherein the automatic line connection control means comprises:
Each of the plurality of frequencies to be used is assigned to each of the plurality of reception systems, and one of the plurality of frequencies is sequentially used as a transmission signal, and a response returned from the partner station at the same frequency as the transmission signal is received. Receiving, determining the frequency having the best communication quality by determining the received signal, determining the fastest transmission rate available at that frequency, and transmitting the transmission data to the partner station under the determined conditions. A transmission / reception device for an HF wireless line. 2. An automatic line connection control means for determining favorable conditions for transmission / reception between a transmission system, a reception system, and a partner station, and transmitting transmission data to the partner station under the determined conditions. A transmission / reception device for an HF radio line, wherein the automatic line connection control means sets each of a plurality of frequencies to be used to a transmission system and a reception system at the time of data transmission; One is sequentially used as a transmission signal, a response returned from the partner station at the same frequency as the transmission signal is received by a reception system, the received signal is determined, and a frequency having the best communication quality among a plurality of frequencies is determined. A transmission / reception device for an HF radio line, wherein the transmission / reception device determines the highest available transmission speed at that frequency, and transmits transmission data to the partner station under the determined conditions. 3. The automatic line connection control means, when transmitting data, switches the transmission frequency switching timing with respect to the reception frequency switching timing on the receiving side at a rate several times the frequency used. 3. The transmission / reception device for an HF wireless line according to claim 2.