JP5619575B2 - Communication control device - Google Patents

Description

  The present invention should be wirelessly transmitted to a specific radio station in a radio station that performs radio transmission opposite to the selected specific radio station among a plurality of radio stations to which channels are individually assigned in advance. The present invention relates to a communication control device that generates information or identifies information wirelessly transmitted from this specific wireless station.

  In a system that realizes wireless communication between a plurality of sites arranged in a wide area, for example, a radio station (hereinafter referred to as “parent station”) installed at a main site among these sites, Simplex radio communication with a plurality of radio stations (hereinafter referred to as “slave stations”) installed at other sites is performed in the HF (High Frequency) band.

FIG. 5 is a diagram illustrating a configuration example of a communication system including a plurality of geographically separated radio stations.
In the figure, a plurality of slave stations 70-1 to 70-n are located in a zone 60 that is an area where radio transmission with the master station 50 is possible. The zone 60 is formed by ionospheric propagation in the HF band at a site of a slave station located outside the line-of-sight distance of the master station 50 among the plurality of slave stations 70-1 to 70-n.

The master station 50 includes the following elements.
(1) Modulator 51 to which downlink transmission information (indicating a sequence of instantaneous voice values, etc.) is input
(2) Frequency conversion unit 52, power amplification unit 53, and matching unit 54 cascaded to the output of modulation unit 51
(3) An antenna 55 having a feeding point connected to the antenna terminal of the joint 54

(4) Amplifying unit 56 and frequency converting unit 57 cascaded to the output of junction unit 54
(5) A demodulator 58 that is arranged after the frequency converter 57 and outputs a demodulated signal
(4) In addition to the input / output ports connected to the control terminals of the modulation unit 51, frequency conversion unit 52, power amplification unit 53, matching unit 54, amplification unit 56, frequency conversion unit 57, and demodulation unit 58, respectively Processor 59 having an input port connected to the output of the operating unit

The slave station 70-1 is composed of the following elements.
(1) Antenna 71-1
(2) Matching section 72-1 connected to the feeding point of antenna 71-1
(3) Amplifying unit 73-1 and frequency converting unit 74-1 cascaded to the output of matching unit 72-1

(4) Demodulator 75-1 disposed downstream of frequency converter 74-1 and outputs a demodulated signal
(5) Modulator 76-1 to which uplink transmission information (indicating a sequence of instantaneous audio values, etc.) is input
(6) A frequency conversion unit 77-1 and a power amplification unit 78-1 cascaded between the output of the modulation unit 76-1 and the input of the matching unit 72-1

(7) Control of the matching unit 72-1, the amplifying unit 73-1, the frequency converting unit 74-1, the demodulating unit 75-1, the modulating unit 76-1, the frequency converting unit 77-1 and the power amplifying unit 78-1. A processor 79-1 having an input port connected to an output of an operation unit (not shown) in addition to an input / output port connected to the terminal
The configuration of the slave stations 70-2 to 70-n is the same as the configuration of the slave station 70-1, and therefore the description and illustration thereof are omitted here.

Also, in the following, for items common to the slave stations 70-1 to 70-n, a suffix “c” is added to the code, which means that it can correspond to any of the suffix numbers “1” to “n”. To describe.
In the communication system having such a configuration, the master station 50 and the slave stations 70-1 to 70-n are respectively located at sites that are geographically separated from each other.

  Any of these slave stations 70-1 to 70-n can communicate with only the master station 50 via the zone 60 as a transmitting end and / or a receiving end in a simplex manner.

As shown in FIG. 6, a predetermined area of the main memory of the processor 59 provided in the master station 50 is optimum for communication with each of the slave stations 70-1 to 70-n by the simplex system ( Alternatively, a frequency table 59T in which radio frequencies are registered in advance is arranged.
Note that the radio frequency registered in the frequency table 59T is maintained at one of the following frequencies with a predetermined frequency (period).

(1) The slave stations 70-1 to 70-n are updated under actual measurement performed individually based on the polling method or the contention method, and the master station 50 is associated with each of these slave stations 70-1 to 70-n. The radio frequency at which the transmission quality of the radio transmission between and the maximum is (or exceeds the predetermined threshold th)
(2) Radio frequency obtained under calculation that simulates the actual measurement

In the master station 50, the processor 59 performs the following process each time the frequency table 59T is updated in this way.
(1) Transmission quality is the highest among radio frequencies suitable for all the slave stations to be secured as main communication partners (all correspond to any of the slave stations 70-1 to 70-n). A specific frequency fs (or exceeding a predetermined threshold TH) is identified.
(2) The slave stations 70-1 to 70-n are sequentially transmitted through the transmission waves modulated with the transmission information indicating the specific frequency fs through the channels of the individual frequencies registered in the frequency table 59T. Is notified of the specific frequency fs.

  In the slave station 70-c, the processor 79-c identifies the specific frequency fs notified in this way, and provides the specific frequency fs to the frequency conversion unit 74-c.

As described above, the master station 50 in the process in which the optimum (preferred) radio frequency is registered in the frequency table 59T and the specific frequency fs is notified to the slave stations 70-1 to 70-n. Regarding the linkage of each part of the slave station 70-c, in the master station 50, generation of downlink transmission information and identification of uplink transmission information are performed by the processor 59, and in the slave station 70-c, uplink transmission information Since the generation and identification of the downlink transmission information are performed as described later except that they are performed by the processor 79-c, the description thereof is omitted here.
The master station 50 and the slave station 70-c cooperate as follows to form a simplex wireless transmission path between them.

[When master station 50 is the transmitting end]
In the master station 50, the processor 59 determines the identification k when the operator designates the slave station (any one of 70-1 to 70-n) 70-k that is designated as a communication partner (via the operation unit). The frequency fs is supplied to the frequency conversion unit 52, and the modulation unit 51, the power amplification unit 53, and the matching unit 54 are activated.

The modulation unit 51 generates a baseband signal modulated with the downlink transmission information described above. The frequency conversion unit 52 generates a transmission wave having a carrier frequency equal to the specific frequency fs by performing frequency conversion on the baseband signal. The power amplifying unit 53 and the matching unit 54 transmit the transmission wave at a predetermined level via the antenna 55.
In the process of generating such a transmission wave, the modulation unit 51, the power amplification unit 53, and the matching unit 54 operate under the control of the processor 59.

On the other hand, in the slave station 70-k, an incoming wave that arrives at the antenna 71-k from the master station 50 via the zone 60 and has a carrier frequency of fs is transmitted via the matching unit 72-k to the amplification unit 73-k. Is further converted into a baseband signal under frequency conversion performed by the frequency converter 74-k. The demodulator 75-k demodulates such a baseband signal, thereby generating a demodulated signal indicating the above-described downlink transmission information (indicating voice or the like).
In the process of generating such a demodulated signal, the matching unit 72-k, the amplifying unit 73-k, and the demodulating unit 75-k operate under the processor 79-k.

  Accordingly, in the section from the master station 50 to the desired slave station 70-k, the downlink transmission information is transmitted to the slave station 70-k in advance through the channel of the specific frequency fs that is notified in advance and is optimal (preferred). A wireless transmission path is formed.

[When slave station 70-c is the transmitting end]
In the slave station 70-c, when the operator requests transmission of uplink transmission information to the master station, the processor 79-c activates the modulation unit 76-c, the power amplification unit 78-c, and the matching unit 72-c.

The modulation unit 76-c generates a baseband signal modulated with the uplink transmission information described above. The frequency conversion unit 77-c generates a transmission wave having a carrier frequency equal to the specific frequency fs by performing frequency conversion on the baseband signal. The power amplifying unit 78-c and the matching unit 72-c transmit the transmission wave at a predetermined level via the antenna 71-c.
In the process of generating such a transmission wave, the modulation unit 76-c, the power amplification unit 78-c, and the matching unit 72-c operate under the processor 79-c.

On the other hand, in the master station 50, an incoming wave that arrives at the antenna 55 from the master station 50 via the zone 60 and has a carrier frequency of fs is amplified by the matching unit 54 and the amplification unit 56, and further, the frequency conversion unit 57. Is converted to a baseband signal under the frequency conversion performed by. The demodulator 58 demodulates such a baseband signal to generate a demodulated signal indicating the above-described downlink transmission information (indicating voice or the like).
In the process of generating such a demodulated signal, the matching unit 54, the amplifying unit 56, and the demodulating unit 58 operate under the processor 59.

Therefore, in a section from the slave station 70-c to the master station 50, a radio transmission path for uplink transmission information is formed through a channel whose carrier frequency is equal to the specific frequency fs described above.
The prior arts related to the present invention include Patent Documents 1 to 4 listed below.

(1) “In a wireless communication device that wirelessly transmits and receives data between a first wireless station and a second wireless station, the first wireless station and the second wireless station can switch between a plurality of wireless channels. A transmission / reception unit, and the transmission / reception unit transmits / receives the data including information of a second wireless channel different from the first wireless channel via the first wireless channel, and the second wireless channel Wireless communication system that can be applied to an environment where a plurality of controllers and a plurality of operation terminals coexist and can establish communication easily in a short time. Communication device and communication control method thereof-Patent Document 1

(2) In the operation frequency selection method between radio stations having a plurality of operation frequencies that are permitted to be used, the frequency switching means that performs scan switching of the operation frequency for each of the transmission radio station and the reception radio station, and error correction A code transmitting means for transmitting the signed dummy code and the transmission frequency switching code is provided, and the receiving radio station receives the error correcting code-added dummy code and records how much error exists. And a determination means for determining the operation frequency recorded in the recording means with the least error as the optimum operation frequency ”,“ transmission / reception at the optimum operation frequency by a pair of transceivers ” Operation frequency selection method characterized by the point that "is possible" ... Patent Document 2

(3) “Rectifying means for rectifying an input signal and converting it to an amplitude signal; and two types of filters having different characteristics for individually obtaining the amplitude change amount and the threshold value by individually processing the amplitude signal from the rectifying means The output from each filter means is compared, and if the amount of change in amplitude exceeds a threshold value, it is determined that there is a possibility that the input signal contains sound, and a sound detection signal is output. And a timer means for outputting a control signal for a predetermined time when a voice detection signal is output from the comparison means. Voice detection control device characterized in that the power consumption of the device can be reduced ... Patent Document 3

(4) “Transmitter, receiver, measurement CN ratio memory that stores the CN ratio value of the operating frequency measured from the received signal of this receiver, and the CN ratio value of the operating frequency calculated from the necessary parameters. Calculated CN ratio memory, a computer for calculating a comprehensive operating frequency ranking from the CN ratio values stored in both of these CN ratio memories, a rank table memory for storing the operating frequency ranking table, and this table memory A determination circuit for determining the optimum operation frequency from the stored operation frequency ranking, a control circuit for measuring the frequency setting of the transceiver and the CN ratio, and a data transmission rate corresponding to the CN ratio of the frequency set by the control circuit. `` Equipped with a modem that selects and establishes an inter-station link and modulates or demodulates during transmission and reception '', so that `` the optimum operating frequency can be reliably selected according to the situation '' Automatic frequency selection device is characterized in ... Patent Document 4

JP 2005-167667 A Japanese Patent Laid-Open No. 10-294685 JP 2002-156997 A Japanese Patent Publication No. 5-14452

By the way, in the above-described conventional example, the radio frequencies that the slave stations 70-1 to 70-n can use for communication with the master station 50 are limited to the specific frequency fs described above.
Accordingly, among the slave stations 70-1 to 70-n, the slave station other than the slave station that performs communication by the simplex communication system via the channel of the specific frequency fs has the specific frequency fs as the parent. If it is not suitable as a radio frequency to be used for communication with the station 50 or if transmission or reception at the specific frequency fs is not possible, it was not possible to participate in communication with the parent station 50 already performed. .

In general, a radio frequency that can be used for communication with the master station 50 in place of such a specific frequency fs is set by using, for example, a known automatic line connection function (ALE: Automatic Link Establishment). Is possible.
However, the radio frequency set by such an automatic line connection function is generally fixed for the above communication and is not used in combination with other radio frequencies.
Therefore, in the conventional example, participation in the communication by a slave station other than the slave station already communicating with the master station 50 has not been easily realized.

The participation in the communication can be realized, for example, by relaying to a radio channel (frequency) in which a slave station already participating in communication with the master station 50 is different.
However, such a relay is actually applied because there are various combinations of radio channels (frequencies) to be relayed, and the configuration of the slave station 70-c is complicated and expensive. It was difficult.

  It is an object of the present invention to provide a communication control apparatus that allows various wireless stations to flexibly participate in already started communication at a low cost without significantly changing the configuration as compared with the conventional example.

According to the first aspect of the present invention, in the communication control device for generating transmission information to be wirelessly transmitted to a specified specific wireless station among a plurality of wireless stations to which channels are individually assigned in advance, channel identification is performed. The means identifies a specific channel pre-assigned to the specific radio station. The identifier adding means adds the identifier of the specific wireless station to transmission information to be wirelessly transmitted to the specific wireless station via the specific channel. The plurality of radio stations are individually assigned in advance with channels having the best transmission quality of radio transmission with a radio station provided with the communication control device or exceeding a predetermined threshold.

That is, in any of the plurality of wireless stations, desired transmission information is wirelessly transmitted along with an identifier of a specific wireless station via a channel assigned in advance.
In addition, the channels that are individually assigned to a plurality of radio stations are selected with an emphasis on the transmission quality of radio transmission with radio stations equipped with the communication control device according to the present invention.

In the invention according to claim 2, in the communication control apparatus for identifying transmission information wirelessly transmitted from a specific wireless station among a plurality of wireless stations to which channels are individually assigned in advance, the incoming wave monitoring means includes Individual channels assigned in advance to a plurality of radio stations are scanned, and incoming waves arriving via any of the individual channels are monitored. The transmission information identifying means identifies transmission information included in an incoming wave that has arrived via the individual channels together with an identifier assigned to a radio station corresponding to the source of the incoming wave. The plurality of radio stations are individually assigned in advance with channels having the best transmission quality of radio transmission with a radio station provided with the communication control device or exceeding a predetermined threshold.

That is, any of the plurality of wireless stations can wirelessly transmit desired transmission information together with the identifier of the local station via a channel assigned in advance.
In addition, the channels that are individually assigned to a plurality of radio stations are selected with an emphasis on the transmission quality of radio transmission with radio stations equipped with the communication control device according to the present invention.

According to a third aspect of the present invention, in the communication control device according to the first or second aspect , wireless transmission between the plurality of wireless stations and the wireless station provided with the communication control device is simplex. The same channel is allocated to all or a part of the plurality of radio stations.

  That is, the wireless station provided with the communication control apparatus according to the present invention and the plurality of wireless stations are shared under the simplex scheme even when the number of the plurality of wireless stations is large. Wireless transmission is possible via as few channels as possible.

In the present invention, any of the plurality of radio stations can flexibly function as a reception end in place of another radio station that is a reception end facing the transmission end provided with the communication control device according to the present invention. .
Further, in the present invention, each of the plurality of radio stations functions flexibly as a transmission end in place of another radio station that was a transmission end facing the reception end provided with the communication control device according to the present invention. Is possible.

Furthermore, in the present invention, the channels pre-assigned to a plurality of radio stations are determined under the criteria applied individually to these radio stations.
In addition, the wireless transmission path between the wireless station provided with the communication control apparatus according to the present invention and the plurality of wireless stations described above is a case where the actual characteristics and physical paths are diverse and widely different. Even if it exists, it is formed without a large disparity in transmission quality.

Furthermore, wireless transmission using a desired number of wireless stations as a transmitting end or a receiving end can be realized at low cost under the restrictions of limited channels and radio frequencies.
Therefore, in the radio communication system to which the present invention is applied, all of the plurality of radio stations are basically the same as the radio station provided with the communication control device according to the present invention, although the configuration is substantially changed. It becomes possible to participate in the communication at low cost together with or in place of other wireless stations that have been communicating in advance.

It is a figure which shows one Embodiment of this invention. It is a flowchart which shows the procedure of the process performed in a main | base station in this embodiment. It is a figure explaining operation | movement of this embodiment. It is a figure which shows the content and format of transmission information in this embodiment. It is a figure which shows the structural example of the communication system comprised from the several radio station separated geographically. It is a figure which shows the structure of a frequency table.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of the present invention.
In the figure, components having the same configuration and function as those of the conventional example shown in FIG.

The difference between the present embodiment and the conventional example shown in FIG. 5 is that, as shown in FIG. 1, a master station 10 is provided in place of the master station 50, and slave stations 70A-1 to 70A-n are slave stations. 70-1 to 70-n.
In the following, for the items common to the slave stations 70A-1 to 70A-n, the suffix “c” is added, which means that it can correspond to any of the suffix numbers “1” to “n”. Describe.

In the configuration of the master station 10, a processor 11 is provided in place of the processor 59 described above, and a specific input port and output port of the processor 11 are respectively connected to an output of the demodulator 58 and a corresponding input of the modulator 51. The connection is different from the configuration of the master station 50 shown in FIG.
The configuration of the slave station 70A-c is different from the configuration of the slave station 70-c shown in FIG. 5 in that a processor 79A-c is provided instead of the processor 79-c described above.

FIG. 2 is a flowchart showing a procedure of processing performed in the master station in the present embodiment.
FIG. 3 is a diagram for explaining the operation of the present embodiment.
Hereinafter, the operation of the present embodiment will be described with reference to FIGS. 1, 2, 3, and 6.

The features of the present invention are as follows in the present embodiment.
(1) Even if the frequency table 59T is updated, the process of identifying the specific frequency fs described above and notifying the slave stations 70A-1 to 70A-n is not performed.

(2) When the frequency table 59T is updated (FIG. 3 (1)), radio frequencies fk (k = 1) individually registered in the frequency table 59T corresponding to the slave stations 70A-1 to 70A-n. To n) are respectively notified to the slave stations 70A-1 to 70A-n (step S1 in FIG. 2, FIG. 3 (2)). As shown in FIG. 4, such a radio frequency fk is transmitted to the slave stations 70A-1 to 70A-n as frames packed as transmission information together with the unique word UW previously given to the corresponding slave station. Be notified.

(3) In the process of forming a simplex wireless transmission path between the master station 10 and the slave stations 70A-c, each unit of the master station 10 performs communication control to be described later under the processor 11.
In addition, the premise of the communication control performed in this embodiment is the same as that of the conventional example shown in FIG.

(1) The master station 10 and the slave stations 70A-1 to 70A-n are respectively installed at geographically separated sites, and the zone 60 is formed in the HF band.
(2) Each of the slave stations 70A-1 to 70A-n can communicate with only the master station 10 via the zone 60 as a transmitting end and / or a receiving end in a simplex manner. .

(3) In a predetermined area of the main memory of the processor 11 provided in the master station 10, as shown in FIG. 6, communication with each of the slave stations 70A-1 to 70A-n is performed by simplex communication. A frequency table 59T in which optimum (or preferable) radio frequencies are registered in advance is arranged in advance.

[Communication control when the master station 10 is the transmitting end]
In the master station 10, the processor 11 identifies the identifier k of the slave station (any one of 70A-1 to 70A-n) 70A-k instructed by the operator as a communication partner (via the operation unit) ( 3 (3)) and the radio frequency fk registered in the frequency table 59T corresponding to the identifier k is specified (step S2 in FIG. 2), and the radio frequency fk is given to the frequency converter 52 (FIG. 2). Along with step S3), the modulation unit 51, power amplification unit 53 and matching unit 54 are activated (step S4 in FIG. 2, FIG. 3 (4)).

  As shown in FIG. 4, the modulation unit 51 generates a baseband signal modulated with a frame in which the unique word UW described above is packed together with downlink transmission information. The frequency conversion unit 52 generates a transmission wave having a carrier frequency equal to the frequency fk by performing frequency conversion on the baseband signal. The power amplifying unit 53 and the matching unit 54 transmit the transmission wave at a predetermined level via the antenna 55 (FIG. 3 (5)).

On the other hand, in the slave station 70A-k, the processor 79-k gives the radio frequency fk allocated in advance as described above to the frequency converter 74-k.
An incoming wave arriving at the antenna 71-k from the master station 10 via the zone 60 and having a radio frequency of fk is amplified by the matching unit 72-k and the amplifying unit 73-k, and further, the frequency converting unit 74- It is converted to a baseband signal under the frequency conversion performed by k. The demodulator 75-k demodulates such a baseband signal to generate a demodulated signal indicating the above-described downlink transmission information (indicating voice or the like).

  Therefore, in the section from the master station 10 to the desired slave station 70A-k, even if the slave station 70A-k changes variously, the channel of the radio frequency fk assigned in advance to the corresponding slave station 70A-k is used. A simplex-type wireless transmission path is formed.

[Communication control when the slave station 70A-c is the transmitting end]
In the slave station 70A-c, when the operator requests transmission of uplink transmission information to the master station (FIG. 3 (6)), the processor 79A-c transmits the radio frequency allocated in advance to the own station as described above. fk is given to the frequency conversion unit 77-c, and the modulation unit 76-c, the power amplification unit 78-c, and the matching unit 72-c are activated.

  The modulation unit 76-c generates a baseband signal modulated by a frame in which the unique word UW described above is packed together with uplink transmission information. The frequency converting unit 77-c generates a transmission wave having a carrier frequency equal to the frequency fk by frequency converting the baseband signal. The power amplifying unit 78-c and the matching unit 72-c transmit the transmission wave at a predetermined level via the antenna 71-c (FIG. 3 (7)).

On the other hand, in the master station 10, the processor 11 does not communicate with any of the slave stations 70A-1 to 70A-n for each common radio frequency Fi registered in the frequency table 59T. The following “scan process” is performed cyclically at a frequency (FIG. 8 (8)).
(1) A combination of slave stations to which the corresponding radio frequency Fi is assigned and a string of unique words of the slave stations included in this combination are identified.

(2) The radio frequency Fi is instructed to the frequency converter 57, and the frequency conversion performed by the frequency converter 57 (applied to the received wave that arrives at the antenna 55 from the corresponding slave station and is given via the amplifier 56). It is determined whether or not the baseband signal is obtained at a predetermined level (step S5 in FIG. 2).

(3) When it is identified that such a baseband signal is generated, uplink transmission information obtained by demodulating the baseband signal by the demodulator 58 is acquired (step S6 in FIG. 2). ).

(4) Among the fields of the frame indicated by the uplink transmission information (hereinafter referred to as “uplink frame”), the unique station UW should be placed in the field where the unique word UW is to be placed as shown in FIG. It is determined whether or not any unique word uwi included in the column of unique words is included (step S7 in FIG. 2).

(5) When the unique word uwi is included in the “uplink frame”, the slave station indicated by the unique word uwi is identified, and the contents of the “transmission information” field included in the “uplink frame” are continuously extracted. (FIG. 2, step S8).

(6) When the received wave from which the “transmission information” can be extracted in this way (coming from the slave station 70A-c and the carrier frequency is Fi) is interrupted (FIG. 3 (9)), the frequency table 59T The “scan process” relating to each of the subsequent radio frequencies Fi registered in (1) is continued (FIG. 3 (10)).

  Therefore, in the HF band where the transmission rate is low, the complicated station and the advanced channel control as performed in a general mobile communication system are not performed, and any of the slave stations 70A-1 to 70A-n A simplex radio transmission path is also formed in the section leading to the station 10 through channels of the radio frequency fk allocated in advance to these slave stations 70A-1 to 70A-n.

  As described above, according to the present embodiment, any slave station that did not initially participate in communication with the master station 10 can communicate with the master station 10 via a channel of a suitable radio frequency fk that has been allocated individually in advance. It becomes possible to participate flexibly in communication.

  In this embodiment, the length of the frame shown in FIG. 4 may be any value. For example, the “transmission information” field has an indefinite length over the entire length of the period during which the slave station 70A-c continues to transmit. May be arranged, or a plurality of individual words UW are individually added to a “transmission information” field in which such a series of audio signals is divided and arranged. Uplink transmission information may be transmitted to the master station 10 as a sequence of frames.

  In addition, the unique word UW arranged in such a frame does not necessarily have to be arranged in a fixed-length field. For example, the unique word UW is divided into predetermined fields of a plurality of frames transmitted in series in time series. It may be arranged or overlapped with one or a plurality of frames (transmitted in chronological order).

Furthermore, in the present embodiment, the following matters may be anything.
(1) Geographical location of master station 10 and slave stations 70A-1 to 70A-n
(2) Number of slave stations 70A-1 to 70A-n
(3) Frequency band in which a radio transmission path should be formed between the master station 10 and the slave stations 70A-1 to 70A-n

(4) Arrangement of frequencies at which individual radio transmission paths (channels) are formed in the frequency band
(5) Modulation / demodulation method applied to these wireless transmission lines
(6) Multiple access systems that realize the formation of these wireless transmission paths (including systems that form multiple channels using a combination of compression coding technology and time division multiplexing technology)

  In the present embodiment, the master station 10 and the slave stations 70A-1 to 70A-n do not have to be fixed stations installed at predetermined points. For example, the master station 10 and the slave stations 70A-1 to 70A-n are mounted on a vehicle or an aircraft. It may be a mobile station.

Furthermore, in the present embodiment, the channel (frequency) used for communication with the slave station 70A-c in the “scan process” process is based on the standard that the unique word uwi described above is included in the “downstream frame”. Identified below.
However, the criterion for such identification is, for example, that the transmission quality of the corresponding incoming wave exceeds a predetermined threshold instead of (or in combination with) the unique word uwi included in the “downstream frame”. There may be.

In the present embodiment, a common channel (radio frequency) is used for transmission of both uplink transmission information and downlink transmission information.
However, these pieces of transmission information may be transmitted in parallel via a full-duplex channel.

  Furthermore, in the present embodiment, the content of the frequency table 59T described above includes the actual measurement of transmission quality, etc., by the master station 10 linking with the slave stations 70A-1 to 70A-n, and the simulation calculation instead of the actual measurement. The update may be performed based on any of these, and the reason why such an update is performed is, for example, a season or a time zone (including changes in characteristics such as ionosphere between the slave station 70A-c and the master station 10). It may be given based on any of the above.

In this embodiment, a sequence of instantaneous values of the audio signal is transmitted as uplink transmission information and downlink transmission information.
However, the transmission information may be any of the following, for example.
(1) Digital information (including information generated under some encoding process)
(2) Obtained by subjecting an analog signal such as a predetermined carrier wave or tone signal to modulation processing such as ASK (Amplitude Shift Keying), FSK (Frequency Shift Keying), PSK (Phase Shift Keying), etc. Sign (string)

Furthermore, the communication control performed by the master station 10 and the slave stations 70A-c in this embodiment is different from the channel control performed in a general mobile communication system, as will be listed below.
(1) The channels that are individually allocated to the slave stations 70A-1 to 70A-n are different from the empty channels that are appropriately allocated without overlapping with the terminal in which the child is generated in the mobile communication system.

(2) The communication path is formed only between any one of the slave stations 70A-1 to 70A-n and the master station 10, and is formed "between a plurality of terminals (via radio base stations). Moreover, it is different from a “communication path in a mobile communication system” in which a plurality of these terminals function as a transmitting end and a receiving end.

(3) “Channels individually assigned to the slave stations 70A-1 to 70A-n” are not always constant. For example, the season, time zone, position and movement of individual radio stations, propagation path through the ionosphere The channel is essentially different from the “channel in the mobile communication system” in that it can be updated as appropriate according to fluctuations in transmission characteristics of the mobile phone.

(4) The channels (frequencies) registered in the frequency table 59T are updated at a predetermined frequency (cycle). However, “channels that are allocated in advance to the slave stations 70A-1 to 70A-n and communicate with the master station 10”. Radio base station of the mobile communication system in that it is a channel that is notified in advance of any of the slave stations 70A-1 to 70A-n that are not provided to the mobile station, and can be allocated to a plurality of different slave stations. It differs from an empty channel assigned to a terminal under a predetermined channel configuration, frequency allocation and zone configuration in (radio control station).

  Further, the present invention is not limited to the above-described embodiments, and various configurations of the embodiments are possible within the scope of the present invention, and any improvements may be made to all or some of the components.

  Hereinafter, among the inventions disclosed in the present application, the invention excluded from the subject matter described in “Claims” conforms to the description in the “Claims” and “Means for Solving the Problems” column. List them in the same style.

[ 4 ] In the communication control device according to any one of claims 1 to 3 ,
The transmission information includes
Control information used for a communication procedure of wireless transmission between the plurality of wireless stations and a wireless station including the communication control device is included.

In the communication control apparatus having such a configuration, in the communication control apparatus according to any one of claims 1 to 3 , the transmission information includes a radio including the plurality of radio stations and the communication control apparatus. Control information used for a communication procedure of wireless transmission with the station is included.

That is, a desired communication procedure can be applied to radio transmission between a radio station provided with the communication control apparatus according to the present invention and the plurality of radio stations.
Therefore, according to the present invention, it is possible to flexibly adapt to various attributes and features of the wireless transmission path used for the wireless transmission described above.

10, 50 Master station 11, 59, 79, 79A Processor 51, 76 Modulation unit 52, 57, 74, 77 Frequency conversion unit 53, 78 Power amplification unit 54, 72 Matching unit 55, 71 Antenna 56, 73 Amplification unit 58, 75 Demodulator 59T Frequency table 60 Zone 70, 70A Slave station

Claims (3)

A communication control device that generates transmission information to be wirelessly transmitted to a specified specific wireless station among a plurality of wireless stations to which channels are individually assigned in advance,
Channel identification means for identifying a specific channel pre-assigned to the specific radio station;
Identifier adding means for adding an identifier of the specific wireless station to transmission information to be wirelessly transmitted to the specific wireless station via the specific channel ;
The plurality of radio stations include
A communication control apparatus, wherein a channel having the best transmission quality of radio transmission with a radio station provided with the communication control apparatus or a channel exceeding a predetermined threshold is assigned in advance . A communication control device for identifying transmission information wirelessly transmitted from a specific wireless station among a plurality of wireless stations to which channels are individually assigned in advance,
An incoming wave monitoring means for scanning individual channels pre-assigned to the plurality of radio stations and monitoring incoming waves arriving via any of the individual channels;
Transmission information identifying means for identifying transmission information included in an incoming wave that has arrived via the individual channel together with an identifier assigned to a radio station corresponding to a transmission source of the incoming wave ;
The plurality of radio stations include
A communication control apparatus comprising: a channel having the best transmission quality of radio transmission with a radio station provided with the communication control apparatus, or a channel exceeding a predetermined threshold value assigned in advance . In the communication control device according to claim 1 or 2,
Radio transmission between the plurality of radio stations and the radio station provided with the communication control device is performed in a simplex system,
All or some of the plurality of radio stations include
A communication control device characterized in that the same channel is allocated .