JP5093505B2 - Relay device, communication system, processing method, communication method, program, and relay circuit - Google Patents

Description

  In the present invention, the transmission cycle indicating the number of times the transmission timing interval is repeated in the header, with the transmission timing interval indicating the order of transmission data transmission timing as a unit, and the transmission When communication is performed between a transmission terminal that transmits a plurality of transmission data generated by different processes including an offset value indicating the timing of transmission in a cycle and a reception terminal that receives the transmission data, the transmission terminal The present invention relates to a relay device that is arranged between the terminal and the receiving terminal and relays transmission data, and a communication system, processing method, communication method, program, and relay circuit using the relay device.

  Conventionally, when communication is performed between a transmission terminal and a reception terminal, a relay device is provided between the transmission terminal and the reception terminal to relay transmission data (for example, Patent Document 1). The conventional relay device registers the transmission data received from the transmission terminal in a queue corresponding to the transmission timing calculated from the period information and offset information included in the header of the transmission data, and performs reception in synchronization with the transmission timing. Sending to the terminal.

FIG. 4 is a schematic block diagram showing a configuration of a conventional communication system.
The communication system includes a transmission terminal 70, a reception terminal 80, and a relay device 90.
The transmission terminal 70 transmits transmission data including a transmission cycle and an offset value in the header.
The receiving terminal 80 receives transmission data transmitted from the transmitting terminal via the relay device 90.
The relay device 90 includes a reception unit 91, a transmission data registration unit 92, a transmission data storage unit 93, a counter unit 94, a transmission data acquisition unit 95, and a transmission unit 96.
The transmission data storage unit 93 has an offset of 0 to 9 for each of 0 to 4095 that is a value that can be taken by a system frame number (SFN) that is a radio frame number defined in 3GPP (3rd Generation Partnership Project). It has a storage area corresponding to the number.
The receiving unit 91 receives transmission data transmitted from the transmission terminal 70.
The transmission data registration unit 92 registers transmission data in a storage area corresponding to the frame number and offset number of the transmission data storage unit 93 based on the transmission cycle and offset value included in the header of the received transmission data 70.
The counter unit 94 outputs the current frame timing and offset timing (transmission timing).
The transmission data acquisition unit 95 acquires transmission data from the storage area of the transmission data storage unit 93 corresponding to the frame timing and offset timing output by the counter unit 94.
The transmission unit 96 transmits the acquired transmission data to the reception terminal 80.

First, transmission data reception processing will be described.
When transmission data is transmitted from the transmission terminal 70, the reception unit 91 receives the transmission data. When the transmission data is received, the transmission data registration unit 92 acquires a transmission cycle and an offset value from the header of the received transmission data. The transmission data registration unit 92 determines the frame number based on the acquired transmission cycle, determines the offset number based on the acquired offset value, and receives it in the storage area of the transmission data storage unit 93 according to the frame number and the offset number. Registered transmission data.

Next, transmission data transmission processing will be described.
The counter unit 94 includes a clock inside and outputs frame timing and offset timing based on the time indicated by the clock. When the value of the frame timing or offset timing output from the counter unit 94 changes, the transmission data acquisition unit 95 sends transmission data from the storage area corresponding to the frame timing and offset timing output from the transmission data storage unit 93 by the counter unit 94. get. When the transmission data acquisition unit 95 acquires the transmission data, the transmission unit 96 transmits the acquired transmission data to the reception terminal 80.
As a result, the relay device 90 periodically transmits transmission data in synchronization with the transmission timing.
JP 2004-153629 A

  However, in the conventional transmission data relaying method, when a jump occurs in the transmission timing due to the time adjustment of the clock provided in the counter unit 94, the transmission data is registered in the transmission data storage unit 93 in order to avoid signal delay. It is necessary to rearrange the transmitted data. The rearrangement of transmission data moves the transmission data registered in each queue to another queue so that transmission data whose transmission order is skipped due to a jump in transmission timing is transmitted at the next transmission timing. It is done by changing. As a result, the amount of the queue to be referred for performing the rearrangement increases, and is registered in the queue for rearranging the transmission data existing between the transmission timing before the update and the transmission timing after the update. The processing amount corresponding to the amount of transmission data increases. Therefore, there is a problem that the processing load increases when the transmission timing is updated. In the above-described example, when the relay apparatus 90 does not perform rearrangement, transmission data whose order is skipped due to a jump in transmission timing is awaited to be transmitted until the offset timing of the frame timing that turns around again. Become. In the communication system described above, since the number of frames is set to 4096, transmission is performed after a maximum delay of 4096 frames. Since the 3GPP radio frame period is 10 milliseconds, a delay of about 40 seconds occurs before transmission.

  The present invention has been made in view of the above points, and the purpose thereof is a relay device, a communication system, a processing method, a communication method, which does not require rearrangement of transmission data even when transmission timing is updated, It is to provide a program and a relay circuit.

The present invention has been made to solve the above-described problem, and the transmission timing interval is repeated several times in the header, with the transmission timing interval indicating the order of timing of transmission of transmission data as a unit. A plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including a transmission cycle indicating whether the transmission cycle is 1 cycle and an offset value indicating the timing of transmission within the transmission cycle. A relay apparatus that receives the transmission data from a transmission terminal and transmits the transmission data to the reception terminal, wherein the number of queues is equal to a predetermined value among common divisors other than 1 of the transmission periods of the plurality of transmission data. And receiving means for receiving the transmission data from the transmission terminal, dividing the offset value of the received transmission data by the number of queues, Transmission data registration means for selecting a queue for registering the received transmission data from the plurality of queues based on the remainder when calculating up to several parts, and registering the received transmission data in the selected queue And a transmission timing output means for counting and outputting the transmission timing, and one queue based on the remainder when the value of the transmission timing is divided by the number of queues and the integer part of the quotient is calculated. Referring to the queue selection means to be selected and the transmission data registered in the selected queue, a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer is the transmission timing output. A transmission permission / non-permission determination unit that determines whether or not the transmission data matches, and transmission data that matches the transmission timing is registered in the queue first. A transmission data acquisition means for acquiring stuff, characterized in that a transmission unit for transmitting the transmission data acquired from the queue to the receiving terminal.

Further, the present invention provides, in the header, a transmission cycle that indicates how many times the transmission timing interval is repeated, with a transmission timing interval indicating the order of transmission data transmission timing as a unit. Relaying the transmission data with a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating the timing of transmission in the transmission cycle A communication system comprising a relay device and a receiving terminal that receives the transmission data, wherein the relay device has the same number as a predetermined value among common divisors that are not 1 of the transmission cycle of the plurality of transmission data. A queue, receiving means for receiving the transmission data from the transmitting terminal, and dividing the offset value of the received transmission data by the number of the queues; Based on the remainder when calculating up to the integer part of the transmission data, the queue for registering the received transmission data is selected from the plurality of queues, and the transmission data registration for registering the received transmission data in the selected queue Means, a transmission timing output means for outputting the transmission timing, and dividing the value of the transmission timing by the number of the queues to select one of the queues based on the remainder when calculating up to the integer part of the quotient A value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer is matched with the transmission timing output by referring to the queue selection means and the transmission data registered in the selected queue. Transmission permission determination means for determining whether or not transmission data first registered in the queue from transmission data that matches the transmission timing A transmission data acquisition means for acquiring, characterized in that a transmission unit for transmitting the transmission data acquired from the queue to the receiving terminal.

Further, the present invention provides, in the header, a transmission cycle that indicates how many times the transmission timing interval is repeated, with a transmission timing interval indicating the order of transmission data transmission timing as a unit. A transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from a transmission cycle of other transmission data, including an offset value indicating a timing at which transmission is performed in the transmission cycle, and a reception terminal that receives the transmission data And a queue having the same number as a predetermined value among the common divisors other than 1 of the transmission cycle of the plurality of transmission data, and arranged between the transmission terminal and the reception terminal. A transmission apparatus that relays the transmission data, wherein the reception means receives the transmission data from the transmission terminal, and the transmission data registration means Divide the offset value of the received transmission data by the number of the queues, and select a queue for registering the received transmission data from the plurality of queues based on the remainder when calculating the integer part of the quotient Then, the received transmission data is registered in the selected queue, the transmission timing output means outputs the transmission timing, and the queue selection means divides the value of the transmission timing by the number of the queues, One queue is selected based on the remainder when calculating up to the integer part, and the transmission availability determination means refers to the transmission data registered in the selected queue, and determines the transmission cycle of the transmission data. It is determined whether or not a value obtained by adding the offset value to a value multiplied by an integer matches the output transmission timing, and the transmission data acquisition means includes the transmission type Acquires from the transmission data that matches the ring those first registered in the queue, transmitting means transmits the transmission data acquired from the queue to the receiving terminal, characterized in that it comprises the.

Further, the present invention provides, in the header, a transmission cycle that indicates how many times the transmission timing interval is repeated, with a transmission timing interval indicating the order of transmission data transmission timing as a unit. A transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from a transmission cycle of other transmission data, including an offset value indicating a transmission timing in the transmission cycle; and transmission of the plurality of transmission data A communication method using a communication system including a relay device that relays the transmission data, and a reception terminal that receives the transmission data, the number of queues being equal to a predetermined number of common divisors having a period other than 1 The receiving unit of the relay device receives the transmission data from the transmitting terminal, and the transmission data registration unit of the relay device receives the received transmission data. Dividing the offset value of the data by the number of queues and selecting a queue for registering the received transmission data from the plurality of queues based on the remainder when calculating up to the integer part of the quotient, The received transmission data is registered in the selected queue, the transmission timing output unit of the relay device outputs the transmission timing, and the queue selection unit of the relay device sets the value of the transmission timing by the number of queues. One of the queues is selected based on the remainder when the integer part of the quotient is calculated, and the transmission availability determination unit of the relay device refers to the transmission data registered in the selected queue Determining whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing; The transmission data acquisition unit of the relay device acquires the transmission data that is first registered in the queue from the transmission data that matches the transmission timing, and the transmission unit of the relay device transmits the transmission data acquired from the queue to the queue. Transmitting to a receiving terminal.

Further, the present invention provides, in the header, a transmission cycle that indicates how many times the transmission timing interval is repeated, with a transmission timing interval indicating the order of transmission data transmission timing as a unit. A transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from a transmission cycle of other transmission data, including an offset value indicating a timing for performing transmission in the transmission cycle, and a reception terminal that receives the transmission data when communicating between the disposed between the transmitting terminal and the receiving terminal, a relay apparatus that relays the transmission data, out of the common divisor is not a first transmission cycle of said plurality of transmission data equal in number to the predetermined single value queues, receiving means for receiving the transmission data from the transmitting terminal, the offset value of the transmission data thus received in the queue Based on the remainder when calculating up to the integer part of the quotient by dividing by the number, a queue for registering the received transmission data is selected from the plurality of queues, and the received transmission data is selected in the selected queue Transmission data registration means for registering the transmission timing, transmission timing output means for outputting the transmission timing, dividing the value of the transmission timing by the number of the queues, and calculating the queue based on the remainder when calculating up to the integer part of the quotient Queue selection means for selecting one, the transmission timing referring to the transmission data registered in the selected queue, and a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer Means for determining whether or not the transmission is possible, and is first registered in the queue from the transmission data that matches the transmission timing. Transmitting data acquisition means for acquiring things, a program for causing the transmission means function as, for transmitting the transmission data acquired from the queue to the receiving terminal.

Further, the present invention provides, in the header, a transmission cycle that indicates how many times the transmission timing interval is repeated, with a transmission timing interval indicating the order of transmission data transmission timing as a unit. Receiving the transmission data from a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating a timing at which transmission is performed in the transmission cycle , A relay circuit for transmitting transmission data to a receiving terminal, wherein the same number of queues as a predetermined value among non-one common divisors of the transmission periods of the plurality of transmission data and the transmission data are received from the transmitting terminal Based on the remainder when the offset value of the received transmission data is divided by the number of the queues and the integer part of the quotient is calculated. Selecting a queue for registering the received transmission data from among the plurality of queues, registering the received transmission data in the selected queue, and a transmission timing output for outputting the transmission timing A circuit, a queue selection circuit that selects one of the queues based on a remainder when the value of the transmission timing is divided by the number of the queues and calculates up to an integer part of a quotient, and is registered in the selected queue A transmission data determination circuit that determines whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing; A transmission data acquisition circuit for acquiring the first transmission data registered in the queue from transmission data matching the transmission timing; A transmission circuit for transmitting the transmission data to the receiving terminal acquired from, characterized in that it comprises a.

  According to the present invention, the relay device includes a number of queues that are common divisors of all transmission cycles that transmission data can take, and divides the offset value of the received transmission data by the number of queues to obtain an integer part of the quotient. The received transmission data is registered in the queue selected based on the remainder when calculating. Then, for each transmission timing, a queue that matches the transmission timing is acquired from the corresponding queue and transmitted. Thereby, even if the transmission timing is updated, the delay of the transmission data whose order has been skipped can be suppressed to a delay corresponding to the number of queues at the maximum, so that the rearrangement can be made unnecessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic block diagram showing a configuration of a communication system according to an embodiment of the present invention.
The communication system includes a relay device 100, a transmission device 110, and a reception device 120.
The transmission terminal 110 transmits transmission data including a transmission period indicating a transmission period and an offset value indicating a transmission timing in the transmission period in a header.
The receiving terminal 120 receives transmission data transmitted from the transmitting terminal via the relay device 100.

The relay device 100 includes a reception unit 101 (reception unit), a transmission data registration unit 102 (transmission data registration unit), a transmission data storage unit 103, a counter unit 104 (transmission timing output unit), and a transmission data acquisition unit 105. (Queue selection means, transmission availability determination means, transmission data acquisition means) and a transmission unit 106 (transmission means).
The transmission data storage unit 103 has m queues that are numbers that are the greatest common divisor of all transmission cycles that transmission data can take. Each queue of the transmission data storage unit 103 is assigned an index number of 0 to m-1. The transmission cycle is information indicating how many times the transmission timing interval is repeated, with the transmission timing interval indicating the order of timing of transmission of transmission data as a unit. In addition, since the transmission cycle that the transmission data can take is determined in advance, the greatest common divisor can be obtained in advance to determine the number of queues.
The receiving unit 101 receives transmission data transmitted from the transmission terminal 110.
The transmission data registration unit 102 calculates the index number of the queue in the transmission data storage unit 103 based on the transmission period and the offset value included in the header of the received transmission data, and transmits the transmission data to the queue having the calculated index number. sign up.
The counter unit 104 includes a clock inside and outputs transmission timing based on the time indicated by the clock.
The transmission data acquisition unit 105 acquires transmission data from the transmission data storage unit 103 from a storage area corresponding to the transmission timing output by the counter unit 104.
The transmission unit 106 transmits the acquired transmission data to the reception terminal 120.

Hereinafter, the operation of the relay apparatus 100 will be described.
First, the operation of the relay device 100 when receiving transmission data will be described.
FIG. 2 is a flowchart showing the operation of the relay device when receiving transmission data.
When the transmission terminal 110 transmits transmission data, the receiving unit 101 of the relay device 100 receives the transmission data from the transmission terminal 110 (step S1). When the reception unit 101 receives the transmission data, the transmission data registration unit 102 acquires an offset value included in the header of the received transmission data (step S2). Next, the transmission data registration unit 102 divides the acquired offset value by the number of queues included in the transmission data storage unit 103, and calculates a remainder when calculating up to the integer part of the quotient (step S3). At this time, the remainders obtained from the transmission data transmitted at the same time position in the period m are equal. When the remainder is calculated, the transmission data registration unit 102 registers the received transmission data at the end of the queue having the index number equal to the calculated remainder value (step S4). Thereby, transmission data to be transmitted at the same time position in the period m can be registered in the same queue.

Next, the operation at the time of transmission data transmission of the relay device 100 will be described.
FIG. 3 is a flowchart showing the operation of the relay device when transmitting transmission data.
The counter unit 104 includes a clock inside and outputs transmission timing based on the time indicated by the clock. The transmission data acquisition unit 105 determines whether the value of the transmission timing output from the counter unit 104 has changed (step S5). If the value of the transmission timing output by the counter unit 104 has not changed (step S5: No), the transmission data acquisition unit 105 continues to monitor the output of the counter unit 104. When the value of the transmission timing output from the counter unit 104 changes (step S5: Yes), the transmission data acquisition unit 105 divides the current transmission timing by the number of queues included in the transmission data storage unit 103, and an integer of the quotient The remainder when calculating up to the portion is calculated (step S6). When the remainder is calculated, the transmission data acquisition unit 105 determines whether or not transmission data is registered in a queue having an index number equal to the calculated remainder value (step S7). When transmission data is not registered in a queue having an index number equal to the calculated remainder value (step S7: No), data transmission is not performed at the current transmission timing. If transmission data is registered in a queue having an index number equal to the calculated remainder value, the header of the transmission data registered at the head of the queue is read (step S8).

  Next, the transmission data acquisition unit 105 determines whether or not the value obtained by adding the offset value included in the header to the value obtained by multiplying the transmission cycle included in the read header by an integer is the current transmission timing. . Thus, it is determined whether or not transmission data corresponding to the header read at the current transmission timing can be transmitted (step S9). When it is determined that the transmission data corresponding to the read header can be transmitted at the current transmission timing (step S9: Yes), the transmission data acquisition unit 105 determines the transmission data corresponding to the read header in the remainder calculated in step S6. A queue having an index number equal to the value is taken out (step S10). When the transmission data is extracted from the queue, the transmission unit 106 transmits the extracted transmission data to the reception terminal 120 (step S11).

If it is determined in step S8 that transmission data corresponding to the header read at the current transmission timing cannot be transmitted (step S9: No), the read header is stored in the queue having the index number equal to the remainder value calculated in step S6. It is determined whether or not transmission data is registered next to the transmission data corresponding to (step S12). When transmission data is registered next to the transmission data corresponding to the read header (step S12: Yes), the transmission data acquisition unit 105 reads the header of the transmission data registered next to the read transmission data. (Step S13). When a new header is read, the process returns to step S8, and it is determined whether or not transmission data corresponding to the newly read header can be transmitted. When transmission data is not registered next to transmission data corresponding to the read header (step S12), the transmission unit 106 does not transmit data at the current transmission timing.
The above is the operation of the relay device 100.

Next, the operation of the relay device 100 will be described using a specific example.
Here, it is assumed that the transmission cycles that the transmission data can take are 10 frame cycles and 20 frame cycles. Therefore, since the greatest common divisor of the transmission cycle that transmission data can take is 10, it is assumed that the transmission data storage unit 103 includes 10 queues.
First, the operation of the relay device 100 when receiving transmission data will be specifically described.
The transmission terminal 110 transmits the transmission data p1 in which transmission period = 10 and offset value = 1 are registered in the header to the relay device 100. When the transmission terminal 110 transmits the transmission data, the reception unit 101 of the relay device 100 receives the transmission data p1 from the transmission terminal 110 in step 1 described above. Next, the transmission data registration unit 102 acquires the offset value “1” included in the header of the transmission data p1 received in step S2. Next, the transmission data registration unit 102 divides the offset value “1” acquired in step S3 by the number of queues included in the transmission data storage unit 103, and calculates a remainder when calculating up to the integer part of the quotient. At this time, since the number of queues = 10, the remainder is 1. When the remainder is calculated, the transmission data registration unit 102 registers the received transmission data p1 in a queue having an index number equal to the calculated remainder value, that is, a queue having an index number of 1, in step S4.

  Next, the transmission terminal 110 transmits the transmission data p2 in which the transmission cycle = 20 and the offset value = 1 are registered in the header to the relay device 100. When the transmission terminal 110 transmits the transmission data, the reception unit 101 of the relay device 100 receives the transmission data p2 from the transmission terminal 110 in step 1 described above. Next, the transmission data registration unit 102 acquires the offset value “1” included in the header of the transmission data p2 received in step S2. Next, the transmission data registration unit 102 divides the offset value “1” acquired in step S3 by the number of queues included in the transmission data storage unit 103, and calculates a remainder when calculating up to the integer part of the quotient. At this time, since the number of queues = 10, the remainder is 1. When the remainder is calculated, the transmission data registration unit 102 registers the received transmission data p2 at the end of the queue having the index number equal to the calculated remainder value, that is, the queue having the index number 1, in step S4.

Next, the transmission terminal 110 transmits transmission data p3 in which the transmission cycle = 20 and the offset value = 11 are registered in the header to the relay device 100. When the transmission terminal 110 transmits the transmission data, the reception unit 101 of the relay device 100 receives the transmission data p3 from the transmission terminal 110 in step 1 described above. Next, the transmission data registration unit 102 acquires the offset value “11” included in the header of the transmission data p3 received in step S3. Next, the transmission data registration unit 102 divides the offset value “11” acquired in step S3 by the number of queues included in the transmission data storage unit 103, and calculates a remainder when calculating up to the integer part of the quotient. At this time, since the number of queues = 10, the remainder is 1. When the remainder is calculated, the transmission data registration unit 102 registers the received transmission data p3 at the end of the queue having the index number equal to the calculated remainder value, that is, the queue having the index number 1, in step S4.
Thereby, the transmission data p1 to p3 to be transmitted at the transmission timing corresponding to the time position “1” in the cycle 10 frames can be registered in the same queue.

Next, an operation at the time of transmission data transmission of the relay device 100 in a state where the transmission data p1 to p3 are registered in the transmission data registration unit 103 will be described.
The counter unit 104 includes a clock inside and outputs the current transmission timing based on the time indicated by the clock. The transmission data acquisition unit 105 determines whether the value of the transmission timing output from the counter unit 104 has changed in step S5. Here, when the value of the transmission timing output from the counter unit 104 changes from 0 frame to 1 frame, in step S6, the transmission data acquisition unit 105 determines the current transmission timing by the number of queues included in the transmission data storage unit 103. Divide and calculate the remainder when calculating up to the integer part of the quotient. Here, since the current transmission timing = 1 frame and the number of queues = 10, the remainder is 1. When the remainder is calculated, in step S7, the transmission data acquisition unit 105 determines whether transmission data is registered in a queue having an index number equal to the calculated remainder value, that is, a queue having an index number of 1. . Since the transmission data p1 to p3 are registered in the queue having the index number 1, the header of the transmission data p1 registered at the head of the queue is read in step S8.

Next, in step S9, the transmission data acquisition unit 105 determines that the value obtained by adding the offset value included in the header to the value obtained by multiplying the transmission cycle included in the header of the read transmission data p1 by an integer is the current transmission timing. It is determined whether or not they match. By this process, it is determined whether or not the transmission data p1 is data that can be transmitted at the current transmission timing. Here, since the transmission cycle of the transmission data p1 is 10, the offset value = 1, and the current transmission timing = 1, the value 10 × 0 + 1 = 1 obtained by adding the offset value to 0 times the transmission cycle and the current transmission timing “ 1 ”matches. Therefore, the transmission data acquisition unit 105 extracts the transmission data p1 from the queue whose index number is 1 in step 10. At this time, since the transmission data p1 is extracted, the transmission data registered in the queue having the index number 1 is p2 and p3.
When the transmission data p1 is extracted from the queue, the transmission unit 106 transmits the extracted transmission data p1 to the reception terminal 120 in step S11.

Next, the value of the transmission timing output from the counter unit 104 changes from 1 to 2. When the value of the transmission timing changes, in step S6, the transmission data acquisition unit 105 divides the current transmission timing by the number of queues included in the transmission data storage unit 103, and calculates the remainder when calculating up to the integer part of the quotient. calculate. Here, since the current transmission timing = 2 frames and the number of queues = 10, the remainder is 2. In step S7, it is determined whether transmission data is registered in the queue having the index number 2. At this time, since transmission data is not registered in the queue having the index number 2, the transmission unit 106 does not transmit data at the current transmission timing.
Similarly, the transmission unit 106 does not transmit data while the value of the transmission timing is changed from 3 frames to 10 frames.

  Next, when the value of the transmission timing output from the counter unit 104 changes from 10 frames to 11 frames, in step S6, the transmission data acquisition unit 105 determines the current transmission timing by the number of queues included in the transmission data storage unit 103. Divide and calculate the remainder when calculating up to the integer part of the quotient. Here, since the current transmission timing = 11 frames and the number of queues = 10, the remainder is 1. When the remainder is calculated, in step S7, the transmission data acquisition unit 105 determines whether transmission data is registered in the queue whose index number is 1. Since the transmission data p2 and p3 are registered in the queue having the index number 1, the header of the transmission data p2 registered at the head of the queue is read in step S8.

  Next, in step S9, the transmission data acquisition unit 105 determines that the value obtained by adding the offset value included in the header to the value obtained by multiplying the transmission cycle included in the header of the read transmission data p2 by an integer is the current transmission timing. It is determined whether or not they match. By this processing, it is determined whether or not the transmission data p2 is data that can be transmitted at the current transmission timing. Here, the transmission cycle of the transmission data p2 = 20, the offset value = 1, and the current transmission timing = 11. At this time, the value 20 × 0 + 1 = 1 obtained by adding the offset value to 0 times the transmission cycle is smaller than the current transmission timing “11”, and the value 20 × 1 + 1 = 21 obtained by adding the offset value to 1 time the transmission cycle is It becomes larger than the current transmission timing “11”. That is, a value obtained by adding the offset value included in the header to a value obtained by multiplying the transmission cycle by an integer does not match the current transmission timing. Therefore, in step S12, it is determined whether or not transmission data is registered in the queue whose index number is 1 after the read transmission data p2. Since the transmission data p3 is registered next to the transmission data p2, the transmission data acquisition unit 105 reads the header of the transmission data p3 in step S13.

Next, in step S9, the transmission data acquisition unit 105 sets the value obtained by adding the offset value included in the header to the value obtained by multiplying the transmission cycle included in the header of the read transmission data p3 by an integer, at the current transmission timing. It is determined whether or not they match. By this process, it is determined whether or not the transmission data p3 is data that can be transmitted at the current transmission timing. Here, since the transmission cycle of the transmission data p3 = 20, the offset value = 11, and the current transmission timing = 11, the value 20 × 0 + 11 = 11 obtained by adding the offset value to 0 times the transmission cycle and the current transmission timing 11 Match. Therefore, the transmission data acquisition unit 105 extracts the transmission data p3 from the queue whose index number is 1 in step 10. At this time, since the transmission data p3 is extracted, the transmission data registered in the queue whose index number is 1 is only p2.
When the transmission data p3 is extracted from the queue, the transmission unit 106 transmits the extracted transmission data p3 to the reception terminal 120 in step S11.
The transmission data p2 is transmitted when the transmission timing becomes 21 by the same operation.

Next, the operation at the time of transmission data transmission of the relay device 100 when there is a jump in transmission timing due to time adjustment of a clock provided in the counter unit 104 will be described.
Hereinafter, a description will be given of a case where the transmission data p1 to p3 are registered in the queue having the index number 1 and the transmission data is not registered in other queues by the above-described operation of the relay device 100 when receiving the transmission data. To do.
First, the counter unit 104 includes a clock inside, and outputs the current transmission timing based on the time indicated by the clock. The transmission data acquisition unit 105 determines whether the value of the transmission timing output from the counter unit 104 has changed in step S5. Here, when the transmission timing jumps due to the time adjustment of the clock provided in the counter unit 104 and the value of the transmission timing changes from 0 frame to 12 frames, the transmission data acquisition unit 105 displays the current data in step S6. Is divided by the number of queues of the transmission data storage unit 103, and the remainder when calculating up to the integer part of the quotient is calculated. Here, since the current transmission timing = 12 frames and the number of queues = 10, the remainder is 2. In step S7, it is determined whether transmission data is registered in the queue having the index number 2. However, since transmission data is not registered in the queue having the index number 2, the transmission unit 106 does not transmit data at the current transmission timing.
Similarly, the transmission unit 106 does not transmit data while the transmission timing value changes from 13 frames to 20 frames.

  Next, when the value of the transmission timing output from the counter unit 104 changes from 20 frames to 21 frames, in step S6, the transmission data acquisition unit 105 determines the current transmission timing by the number of queues included in the transmission data storage unit 103. Divide and calculate the remainder when calculating up to the integer part of the quotient. Here, since the current transmission timing is 21 frames and the number of queues is 10, the remainder is 1. When the remainder is calculated, in step S7, the transmission data acquisition unit 105 determines whether transmission data is registered in a queue having an index number equal to the calculated remainder value, that is, a queue having an index number of 1. . Since the transmission data p1 to p3 are registered in the queue having the index number 1, the header of the transmission data p1 registered at the head of the queue is read in step S8.

Next, in step S9, the transmission data acquisition unit 105 determines that the value obtained by adding the offset value included in the header to the value obtained by multiplying the transmission cycle included in the header of the read transmission data p1 by an integer is the current transmission timing. It is determined whether or not they match. By this process, it is determined whether or not the transmission data p1 is data that can be transmitted at the current transmission timing. Here, since the transmission cycle of the transmission data p1 is 10, the offset value = 1, and the current transmission timing = 1, the value 10 × 2 + 1 = 21 obtained by adding the offset value to twice the transmission cycle and the current transmission timing 21 Match. Therefore, the transmission data acquisition unit 105 extracts the transmission data p1 from the queue whose index number is 1 in step 10.
When the transmission data p1 is extracted from the queue, the transmission unit 106 transmits the extracted transmission data p1 to the reception terminal 120 in step S11. As a result, even if a jump occurs in the transmission timing, the number of queues is 10, which is the greatest common divisor of each transmission cycle, so that the next transmission cycle of the transmission data p1 is not performed without rearranging the queues. The transmission data p1 can be transmitted after 9 frames corresponding to the transmission timing.

  As described above, according to the present embodiment, the relay device 100 includes a number of queues that are common divisors of all transmission cycles that transmission data can take, and the offset value of the transmission data received from the transmission terminal 110 is stored in the queue. The received transmission data is registered in the queue selected based on the remainder when the integer part of the quotient is calculated by dividing by the number. Then, from the queue of index numbers calculated by the transmission timing output from the counter unit 104, the one that matches the transmission timing is acquired and transmitted. According to this process, since the number of queues is a common divisor of each transmission cycle, it is determined whether transmission is possible for transmission data registered in the same queue using the common divisor of each transmission cycle as a cycle. Is meant to do. Therefore, even if the transmission timing jumps due to the time adjustment of the relay device 100 or the like, the transmission data whose transmission order is skipped without performing the rearrangement of the queue is transmitted at the transmission timing corresponding to the next transmission cycle of the transmission data. Transmission can be performed, and transmission time delay due to transmission timing skip can be eliminated.

  Further, according to the present embodiment, by setting the number of queues to be the greatest common divisor of all transmission cycles that transmission data can take, there is transmission data in the queue that does not match the transmission timing in comparison with the transmission cycle. The probability of doing can be lowered. As a result, the number of determinations can be reduced when determining whether or not the transmission timing matches the corresponding queue.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to
For example, in the present embodiment, the case where the communication system includes one transmission terminal 110 and one reception terminal 120 has been described for the sake of simplicity. However, the present invention is not limited to this, and actually includes a plurality of transmission terminals 110 and reception terminals 120. The transmission unit of the relay device 100 specifies the destination receiving terminal using the destination information included in the header of the transmission data.

  The relay apparatus 100 described above has a computer system inside. Each process described above is stored in a computer-readable recording medium in the form of a program, and the above process is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

It is a schematic block diagram which shows the structure of the communication system by one Embodiment of this invention. It is a flowchart which shows the operation | movement at the time of transmission data reception of a relay apparatus. It is a flowchart which shows the operation | movement at the time of transmission data transmission of a relay apparatus. It is a schematic block diagram which shows the structure of the conventional communication system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Relay apparatus 101 ... Reception part 102 ... Transmission data registration part 103 ... Transmission data storage part 104 ... Counter part 105 ... Transmission data acquisition part 106 ... Transmission part 110 ... Transmission terminal 120 ... Reception terminal

Claims (7)

In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle The transmission data is received from a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating a timing at which transmission is performed, and the transmission data is received by the reception terminal A relay device for transmitting,
The same number of queues as a predetermined value among common divisors that are not 1 in the transmission cycle of the plurality of transmission data ;
Receiving means for receiving the transmission data from the transmitting terminal;
Dividing the offset value of the received transmission data by the number of the queues, a queue for registering the received transmission data from the plurality of queues based on a remainder when calculating up to an integer part of a quotient A transmission data registration means for selecting and registering the received transmission data in the selected queue;
Transmission timing output means for counting and outputting the transmission timing;
A queue selection means for selecting one of the queues based on a remainder when the value of the transmission timing is divided by the number of the queues and calculating an integer part of a quotient;
Referring to the transmission data registered in the selected queue, it is determined whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing. Means for determining whether or not to transmit,
Transmission data acquisition means for acquiring one registered earlier in the queue from transmission data matching the transmission timing;
Transmission means for transmitting transmission data acquired from the queue to the receiving terminal;
A relay device comprising: The number of queues is the greatest common divisor of all transmission cycles that the transmission data can take.
The relay apparatus according to claim 1. In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle A transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating a timing for performing transmission, a relay device that relays the transmission data, and the transmission A communication system comprising a receiving terminal for receiving data,
The relay device is
The same number of queues as a predetermined value among common divisors that are not 1 in the transmission cycle of the plurality of transmission data ;
Receiving means for receiving the transmission data from the transmitting terminal;
Dividing the offset value of the received transmission data by the number of the queues, a queue for registering the received transmission data from the plurality of queues based on a remainder when calculating up to an integer part of a quotient A transmission data registration means for selecting and registering the received transmission data in the selected queue;
Transmission timing output means for outputting the transmission timing;
A queue selection means for selecting one of the queues based on a remainder when the value of the transmission timing is divided by the number of the queues and calculating an integer part of a quotient;
Referring to the transmission data registered in the selected queue, it is determined whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing. Means for determining whether or not to transmit,
Transmission data acquisition means for acquiring the first registered in the queue from transmission data that matches the transmission timing;
Transmission means for transmitting transmission data acquired from the queue to the receiving terminal;
A communication system comprising: In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle Communication between a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating the timing of transmission, and a reception terminal that receives the transmission data When performing , the number of queues equal to a predetermined value among the common divisors that are not 1 of the transmission cycle of the plurality of transmission data is provided, arranged between the transmission terminal and the reception terminal, A processing method in a relay device that performs relay,
The receiving means receives the transmission data from the transmission terminal,
The transmission data registration means divides the offset value of the received transmission data by the number of the queues, and based on the remainder when calculating up to the integer part of the quotient, the transmission data received from the plurality of queues Select a queue to register data, register the received transmission data in the selected queue,
The transmission timing output means outputs the transmission timing,
The queue selection means divides the value of the transmission timing by the number of the queues, selects one of the queues based on the remainder when calculating up to the integer part of the quotient,
The transmission availability determination unit refers to the transmission data registered in the selected queue, and a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing. Determine whether or not to
The transmission data acquisition means acquires the first registered in the queue from the transmission data that matches the transmission timing,
The transmission means transmits the transmission data acquired from the queue to the receiving terminal.
The processing method characterized by comprising. In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle A transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating a transmission timing, and a common divisor that is not 1 of the transmission cycle of the plurality of transmission data A communication method using a communication system including a relay device that relays the transmission data and a reception terminal that receives the transmission data, the number of queues being the same as a predetermined value of
The receiving means of the relay device receives the transmission data from the transmitting terminal,
The transmission data registration means of the relay device divides the offset value of the received transmission data by the number of the queues, and based on the remainder when calculating up to the integer part of the quotient, the transmission data registration means Select a queue for registering the received transmission data, register the received transmission data in the selected queue,
The transmission timing output means of the relay device outputs the transmission timing,
The queue selection unit of the relay device divides the value of the transmission timing by the number of the queues, and selects one of the queues based on the remainder when calculating up to the integer part of the quotient,
The transmission permission determination unit of the relay device refers to the transmission data registered in the selected queue, and the value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer is output. Determine whether it matches the transmission timing,
The transmission data acquisition means of the relay device acquires the first registered in the queue from transmission data that matches the transmission timing,
The transmission means of the relay device transmits the transmission data acquired from the queue to the receiving terminal.
A communication method comprising: In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle Communication between a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating the timing of transmission, and a reception terminal that receives the transmission data When performing, a relay device that is arranged between the transmission terminal and the reception terminal and relays the transmission data,
The same number of queues as a predetermined value among common divisors that are not 1 in the transmission cycle of the plurality of transmission data ,
Receiving means for receiving the transmission data from the transmitting terminal;
Dividing the offset value of the received transmission data by the number of the queues, a queue for registering the received transmission data from the plurality of queues based on a remainder when calculating up to an integer part of a quotient A transmission data registration means for selecting and registering the received transmission data in the selected queue;
Transmission timing output means for outputting the transmission timing;
A queue selection means for selecting one of the queues based on a remainder when the value of the transmission timing is divided by the number of the queues and calculating an integer part of a quotient;
Referring to the transmission data registered in the selected queue, it is determined whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing. Means for determining whether to transmit,
Transmission data acquisition means for acquiring the first registered in the queue from transmission data that matches the transmission timing,
Transmitting means for transmitting transmission data acquired from the queue to the receiving terminal;
Program to function as. In the header, a transmission cycle indicating the number of transmission timing intervals indicating the order of timing of transmission of transmission data, and a transmission cycle indicating how many times the transmission timing interval is repeated, and the transmission cycle The transmission data is received from a transmission terminal that transmits a plurality of transmission data whose transmission cycle is not disjoint from the transmission cycle of other transmission data, including an offset value indicating a timing at which transmission is performed, and the transmission data is received by the reception terminal A relay circuit for transmitting,
The same number of queues as a predetermined value among common divisors that are not 1 in the transmission cycle of the plurality of transmission data ;
A receiving circuit for receiving the transmission data from the transmitting terminal;
Dividing the offset value of the received transmission data by the number of the queues, a queue for registering the received transmission data from the plurality of queues based on a remainder when calculating up to an integer part of a quotient A transmission data registration circuit that selects and registers the received transmission data in the selected queue;
A transmission timing output circuit for outputting the transmission timing;
A queue selection circuit that divides the value of the transmission timing by the number of queues and selects one of the queues based on a remainder when calculating up to an integer part of a quotient;
Referring to the transmission data registered in the selected queue, it is determined whether or not a value obtained by adding the offset value to a value obtained by multiplying the transmission cycle of the transmission data by an integer matches the output transmission timing. A transmission data determination circuit to perform,
A transmission data acquisition circuit that acquires the first registered data in the queue from transmission data that matches the transmission timing;
A transmission circuit for transmitting transmission data acquired from the queue to the receiving terminal;
A relay circuit comprising:

Images