JPH08154287A - Interrupt processing method in time division multiplex transmission system - Google Patents

Abstract

PURPOSE: To realize an interrupt processing method for a time division multiplex transmission system in which the processing capability of the system is not deteriorated. CONSTITUTION: Upon receipt of an interrupt request signal from terminals 1-9, a master set generates a transmission packet having a timing slot for each group and transmission the packet. Upon receipt of the transmission packet addressed to itself and sent from the master set, a reply packet generating section 13 generates a reply packet when its own terminal equipment is in an interrupt state and the terminal equipment replies the packet in a timing of a timing slot of a group recognized by a timing slot coincidence discrimination section 15 and to which the terminal equipment belongs to the master set. When the master set receives the reply packet, the master set generates and sends a transmission packet having a timing slot for each address, and the terminals 1-9 in the interrupt state reply a reply packet in the timing of a timing slot of its own address recognized by the timing slot coincidence discrimination section 15 and the master set specifies any of the terminals 1-9 in the interrupt state based on the reply timing of the reply packet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interrupt processing method for a time division multiplex transmission system for performing signal transmission by time division multiplex between a master unit and a plurality of terminals via a signal line.

[0002]

2. Description of the Related Art FIG. 12 is an overall configuration diagram showing an example of a time division multiplex transmission system. The time division multiplex transmission system, as shown in FIG. 12, has addresses 01 to 03 and 11 to 11.
Terminals 1 to 9 having 13, 21 to 23 and the master device 10 are connected via a transmission line L.

FIG. 13 is a format diagram of a transmission packet generated in the base unit 10 according to the conventional example. The transmission packet is composed of start pulse, mode data, address data, control data, and reply band. Here, the start pulse signals the start of transmission of the transmission packet. The mode data defines the data content, and includes a normal mode for accessing normal data and an interrupt processing mode for accessing the terminals 1 to 9 in the interrupt state. The address data indicates the address of the other terminal device 1 to 9 that transmits the packet. The control data is data indicating how to control the terminals 1 to 9. The reply band is a timing at which the terminals 1 to 9 send back a reply packet to the master device 10.

When the master device 10 receives an interrupt request signal from any of the terminal devices 1 to 9, first, all the address devices 1 to 9 in the interrupt state are interrupted by replying to all addresses. The processing mode is set, and a transmission packet in which nothing is written in the address data and control data (involved) is generated and transmitted. When the terminal devices 1 to 9 receive the transmission packet transmitted from the master device 10, the terminal devices 1 to 9 in the interrupt state.
Generates a reply packet including its own address and returns it to the master device 10 at the timing of the timing slot.

Here, if there is one terminal device in the interrupting state, the master device 10 can determine the address of the terminal device in the interrupting state at this time, but a plurality of terminal devices are in the interrupting state. In some cases, the reply packets will overlap and the data will be squashed, making it impossible to identify the terminal device in the interrupted state.

In such a case, the base unit 10 sets the lower address reply interrupt processing mode, specifies only the upper address with the address data, generates a transmission packet in which the control data is irrelevant, and generates the terminals 1 to 1. Send to 9.

Upon receiving the transmission packet, the terminals 1 to 9 which are in the self interrupting state, only the terminals 1 to 9 corresponding to the higher address specified by the address data have their own addresses with respect to the master device 10. A reply packet including is generated and returned at the timing of the reply band. If the reply packets do not overlap at this point and the data is not crushed, the addresses of the terminals 1 to 9 in the interrupted state can be specified. However, when there are a plurality of terminals 1 to 9 which have the designated upper address and are in the interrupting state, the reply packets are overlapped, the data is crushed, and the terminals 1 to 1 in the interrupting state.
The address of 9 cannot be specified.

In such a case, in the normal mode, the base unit 10 sets the address data to the upper address specified when the data is crushed, and further generates a transmission packet in which the lower address is changed. To send.

When the terminal devices 1 to 9 receive the transmission packet transmitted from the master device 10, if they are in the interrupt state, when they match the address designated by the address data, The included reply packet is generated and returned to the master device 10 at the timing of the reply band.

Then, the base unit 10 sequentially changes the lower address to specify the addresses of the terminals 1 to 9 in the interrupt state.

[0011]

However, in the above-described interrupt processing method of the time division multiplex transmission system, when the terminals of a plurality of groups are simultaneously in the interrupt state, the addresses are sequentially changed to change the terminals. Since the transmission packet must be transmitted to 1 to 9, the number of transmission packets increases,
It was reducing the processing capacity of the system.

The present invention has been made in view of the above points, and an object thereof is to provide an interrupt processing method for a time division multiplex transmission system in which the processing capacity of the system does not decrease. Especially.

[0013]

According to the first aspect of the present invention,
A plurality of terminals having a unique address and the master unit are connected via a transmission line, and the master unit divides the terminals into groups,
The terminal device stores which group it belongs to, transmits a transmission packet from the master device to the terminal device to give control data, and sends monitoring data from the terminal device to the timing slot provided in the transmission packet. In the interrupt processing method of the time-division multiplex transmission system, the master unit generates and transmits a transmission packet having a timing slot for each group when an interrupt request signal is issued from the terminal device. When the terminal device receives the transmission packet, the terminal device generates a reply packet at the timing of the timing slot of the group to which the terminal device belongs, and sends the reply packet back to the master device, and the master device,
It is characterized in that the group in the interrupted state is determined by the reply timing of the reply packet.

According to a second aspect of the invention, in the interrupt processing method of the time division multiplex transmission system according to the first aspect, when the master unit determines a group in an interrupt state, the master unit interrupts. A group in a busy state is specified, a transmission packet having a timing slot for each address of a terminal existing in the group is generated and transmitted, and the terminal belongs to the group specified in the transmission packet. When the group matches, it recognizes it as a transmission packet for the group to which it belongs, and when it is in an interrupt state, it generates a reply packet at the timing of the timing slot of its own address and sends it back to the master unit, and the master unit It is characterized in that the address of the terminal device in the interrupt state is determined by the reply timing of the reply packet.

According to a third aspect of the present invention, in the interrupt processing method of the time division multiplex transmission system according to the first aspect, by including the address of the terminal device in the reply packet, the same received by the master device. When the number of reply packets in the group is one, the address of the terminal device in the interrupt state in the master unit can be determined.

According to a fourth aspect of the present invention, in the interrupt processing method for the time division multiplex transmission system according to the second aspect, the master unit preliminarily sets a priority order for each group and specifies the group based on the priority order. It is characterized in that the transmission packet is generated.

[0017]

In the interrupt processing method of the time division multiplex transmission system according to claim 1, when the interrupt request signal is issued from the terminal device, the master unit generates a transmission packet having a timing slot for each group. When the terminal device receives the transmission packet, the terminal device generates a reply packet at the timing of the timing slot of the group to which the terminal device belongs, and sends the reply packet to the master device. Therefore, the parent device can determine the group in the interrupt state according to the reply timing of the reply packet.

According to a second aspect of the invention, in the interrupt processing method of the time division multiplex transmission system according to the first aspect, when the master unit determines a group in an interrupt state, the master unit interrupts. A group in a busy state is specified, a transmission packet having a timing slot for each address of a terminal existing in the group is generated and transmitted, and the terminal belongs to the group specified in the transmission packet. When it matches with the group, it recognizes it as a transmission packet for the group to which it belongs, and when it is in an interrupt state, it generates a reply packet at the timing of the timing slot of its own address and returns it to the master unit. The master device can determine the address of the terminal device in the interrupt state according to the reply timing of the reply packet.

According to a third aspect of the present invention, in the interrupt processing method of the time division multiplex transmission system according to the first aspect, since the reply packet includes the address of the terminal device, the master device receives the reply packet. When the number of reply packets in the same group is one, the address of the terminal device in the interrupt state can be determined.

According to a fourth aspect of the present invention, in the interrupt processing method for the time division multiplex transmission system according to the second aspect, the master unit preliminarily determines the priority order for each group and specifies the group based on the priority order. Since it is configured to generate the transmitted packet, it is not necessary to allocate terminals with higher priority in order from the one with the smallest address value when you want to set the priority of access to terminals, and you can freely assign the address of the terminal. Can be assigned to

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of terminals 1 to 9 of a time division multiplex transmission system according to an embodiment of the present invention. The terminal devices 1 to 9 include a transmission packet reception unit 11, an interrupt state detection unit 12, a reply packet generation unit 13, and a reply packet transmission unit 1.
4, a timing slot coincidence determination unit 15 and an address / group storage unit 16. Here, the transmission packet receiving unit 11 receives a transmission packet, which will be described later, transmitted from the master device 10 and outputs a reply timing to an interrupt band, which will be described later. The interrupt state detection unit 12
It is to detect whether or not the self is in a state where an interrupt should be made due to changes in the monitoring input. The reply packet generator 13 is for generating an interrupt request signal and a reply packet notifying that the self is in an interrupt state. The reply packet transmitter 14 is for transmitting the reply packet generated by the reply packet generator 13 when a timing slot match signal described later is input. The timing slot match determination unit 15 determines whether the timing slot in the transmission packet is the timing slot of the address of the group to which it belongs or the address of its own address. It outputs a timing slot coincidence signal to the signal line 14. The address / group storage unit 16 stores addresses and groups assigned to itself.

FIG. 2 is a block diagram of the base unit 10 of the time division multiplex transmission system according to the embodiment of the present invention. Base unit 1
0 is the transmission packet generation unit 17 and the transmission packet transmission unit 1
8 and a reply packet receiving unit 19. Here, the transmission packet generation unit 17 generates a transmission packet to be transmitted to the terminals 1-9. The transmission packet transmission unit 18 transmits the transmission packet generated by the transmission packet generation unit 17 to the terminals 1-9. The reply packet receiving unit 19 receives the interrupt request signal and the reply packet transmitted from the terminals 1 to 9.

FIG. 3 is an overall configuration diagram showing an example of a time division multiplex transmission system according to this embodiment. As shown in FIG. 3, the time division multiplex transmission system has addresses 01 to 03,
Terminals 1 to 9 having 11 to 13 and 21 to 23 and a base unit 1
0 is connected via a transmission line L. Then, the terminals 1-3 having the addresses 01-03 are grouped "
0 "and terminals 4 to 6 having addresses 11 to 13 are grouped as" 1 "and terminals 7 to 9 having addresses 21 to 23.
Is a group “2”, and the terminals 1 to 9 store group data indicating which group they belong to.

Next, FIG. 4 is a format diagram of a transmission packet used in this embodiment. The transmission packet is composed of start pulse, mode data, group data, and timing slot. Here, the start pulse is for notifying the start of transmission of a transmission packet. The mode data defines the data content, and has a normal mode for accessing normal data and an interrupt processing mode for accessing the terminals 1 to 9 in the interrupt state. The modes further include those for group search and those for address search. The group data indicates a group that transmits the transmission packet. The timing slot is a timing at which the terminals 1 to 9 send back a reply packet to the master device 10, has a timing slot for each group or each address, and is arranged in the order of groups or the order of addresses. It is possible to recognize which group or which address terminal device is in the interrupted state by the reply timing of the reply packets returned from 1-9. It should be noted that the transmission packet regularly includes an interrupt band for receiving an interrupt request signal transmitted when the terminals 1 to 9 enter the interrupt state in the normal mode.

The operation of this embodiment will be described below.
FIG. 5 is a waveform diagram of a packet according to the present embodiment, and FIG.
3 is a flowchart showing the operation of this embodiment. Here, a case will be described in which an interruption state occurs in the terminal device 6 when the master device 10 is in the normal mode. The terminal 6 is
When the interrupt state detection unit 12 detects that it is in a state in which it should make an interrupt, the reply packet generation unit 13 generates an interrupt request signal, and the reply packet transmission unit 14 sends the interrupt request signal at the reply timing of the interrupt band. It is transmitted to the master device 10.

When the reply packet receiving unit 19 of the base unit 10 receives the interrupt request signal, the transmission packet generating unit 17 sets the mode data to the interrupt processing mode for group search, and the group data is not involved (group Is not specified) and a transmission packet having a timing slot for each group is generated. Then, the generated transmission packet is transmitted from the transmission packet transmission unit 18.
Since the group data is set to be irrelevant, all groups receive the transmission packet transmitted from the master device 10.

When the interrupt status detecting unit 12 detects that the terminals 1 to 9 are in a state in which they should interrupt, the reply packet generating unit 13 puts them into the interrupt state. A reply packet indicating that there is is generated and output to the reply packet transmitter 14. Terminals 1-9
When the transmission packet receiving unit 11 receives the transmission packet transmitted from the master device 10, since the group data is irrelevant, the timing slot coincidence determining unit 15 determines whether or not it is the timing slot of the group to which the self belongs. If they match, the timing slot match signal is output to the reply packet transmitter 14. When receiving the timing slot match signal from the timing slot match determination section 15, the reply packet transmission section 14 returns a reply packet to the master device 10. In this embodiment, since the terminal device 6 is in a state in which it should interrupt,
As shown in FIG. 5, the reply packet is returned at the timing of the timing slot of the group 1 to which the terminal device 6 belongs.

When the reply packet receiving section 19 of the parent device 10 receives the reply packet returned from the terminal device 6,
The group to which the terminal device 6 in the interrupt state belongs is determined by the reply timing of the reply packet.

Here, in the case where the reply packet returned from the terminals 1 to 9 to the parent device 10 includes its own address, each group "0", "
When there is only one reply packet in 1 ”and“ 2 ”, the addresses of the terminals 1 to 9 in the interrupt state can be determined at the above-mentioned stage by recognizing the address in the reply packet. it can.

The master device 10 is a terminal device 1 to 9 in an interrupted state.
When the group to which the packet belongs is determined, the transmission packet generation unit 1
7, the mode data is set to the interrupt processing mode for address search, and the group data is set to the reply packet determination unit 1.
The transmission packet having the timing slot for each address of the terminals 1 to 9 existing in the set group is generated. Then, the generated transmission packet is transmitted from the transmission packet transmission unit 18.

The terminal devices 1 to 9 include the transmission packet receiving unit 11
When the transmission packet transmitted from the parent device 10 is received at, the timing slot coincidence determination unit 15 recognizes that the transmission packet is for the group to which it belongs, which is stored in the address / group storage unit 16. It is determined whether or not it is the timing slot of the address, and if they match, the reply packet transmission unit 14
In response to this, a timing slot coincidence signal is output. When the reply packet transmitter 14 receives the timing slot match signal from the timing slot match determiner 15,
A reply packet is returned to the master device 10. Here, in the present embodiment, since the terminal device 6 is in the interruption state, the timing slot coincidence determination unit 15 determines the group “1” to which the terminal belongs and the group “1” specified by the group data in the transmission packet. And compare and if they match,
The timing slot for the address 13 is determined, and the reply packet transmission unit 14 sends a reply to the master device 10 at the timing of the timing slot for the address 13.

When the reply packet receiving unit 19 receives the reply packet from the terminal device 6, the master device 10 determines the terminal device 6 in the interrupted state according to the reply timing of the reply packet. FIG. 7 is a waveform diagram of a reply packet indicating that a plurality of terminals in the same group should make an interrupt. In the same manner as the above method, the terminals 4 and 6 in the interrupting state are shown. Can be confirmed.

Therefore, according to the present embodiment, it is not necessary to transmit the transmission packet in which the upper or lower address is changed until the terminals 1 to 9 in the interrupt state are determined, and the group is specified and transmitted. With this, it is possible to determine the terminal in the interrupted state at a time.

FIG. 8 is an overall configuration diagram of a time division multiplex transmission system according to another embodiment of the present invention. The time division multiplex transmission system of the present embodiment has addresses 01, 02, 11, 1
Terminals 1 to 9 having 2, 21, 22, 31 to 33 and the master device 10 are connected via a transmission line L. And
A group of terminals 1 and 2 having addresses 01 and 02 "
0 ", the terminals 3 and 4 having the addresses 11 and 12 are grouped into the terminals" 1 "and the terminals 5 and 6 having the addresses 21 and 22.
Is a group "2", terminals 7 to 9 having addresses 31 to 33 are a group "3", and the terminals 1 to 9 store group data indicating which group they belong to.

FIG. 9 is a block diagram of the parent device 10 according to the present embodiment, and only parts different from the configuration of the parent device 10 of the above embodiment will be described. Upon receiving reply packets from a plurality of groups, the priority order determination unit 20 outputs a priority group packet generation request signal to the transmission packet generation unit 17 based on the predetermined priority order of the groups. Note that the block diagrams of the terminals 1 to 9 are similar to the configuration of the above-described embodiment, so description thereof will be omitted.

FIG. 10 is a table showing the priority levels stored in the priority level determination unit 20 according to this embodiment.
FIG. 11 is a flowchart showing the operation of this embodiment. The method of determining the terminals 1 to 9 in the interrupted state is the same as in the above-described embodiment. Here, a case will be described in which a reply packet is returned from a plurality of groups, for example, a group “0” and a group “1” at the same time. Base unit 10
Are group “0” and group “0” depending on the reply timing of the reply packet received by the reply packet receiving unit 19.
When it is recognized that "1" is in the interrupt state, the priority determination unit 2
Based on the priority stored in 0, a priority group packet generation request signal is output to the transmission packet generation unit 17. In the present embodiment, the group “1” has priority over the group “0”, so the priority determination unit 20 sends a priority group packet generation request signal to the transmission packet generation unit 17 that gives priority to the group “1”. Output. When a priority group packet generation request signal that gives priority to the group “1” is input from the priority determination unit 20, the transmission packet generation unit 17 generates a transmission packet specifying the group data as the group “1”, and the transmission packet Transmitter 1
Send from 8. When the master device 10 determines a terminal device in the interrupt state in the group "1", the transmission packet generation unit 17 then generates a transmission packet specifying the group data as the group "0" and transmits the transmission packet. The packet is transmitted from the packet transmission unit 18, and similarly, the terminal device in the interrupted state is determined.

Therefore, according to the present embodiment, in the system in which it is desired to prioritize the access to the terminals 1 to 9, it is not necessary to allocate the terminals having the higher priority in order from the one having the smallest address value. 9 addresses can be freely assigned.

[0038]

According to the invention described in claim 1, when an interrupt request signal is issued from the terminal device, the master unit generates and transmits a transmission packet having a timing slot for each group, When the terminal device receives a transmission packet, when it is in an interrupt state, it generates a reply packet at the timing of the timing slot of the group to which it belongs and returns it to the master device. A group in an interrupt state can be determined by the packet return timing, and an interrupt processing method for a time division multiplex transmission system that does not reduce the processing capacity of the system can be provided.

According to the invention of claim 2, claim 1
In the interrupt processing method of the time division multiplex transmission system described, when the master unit determines the group in the interrupt state,
The master device identifies the group in the interrupt state, generates and transmits a transmission packet having a timing slot for each address of the terminal device existing in the identified group, and the terminal device is identified by the transmission packet. When the group matches the group to which it belongs, it recognizes it as a transmission packet for the group to which it belongs, and when it is in an interrupt state, it creates a reply packet at the timing slot timing of its own address and sends it back to the master unit. Because I chose
The master device can determine the address of the terminal device in the interrupt state by the reply timing of the reply packet.

According to the invention of claim 3, claim 1
In the interrupt processing method of the time-division multiplex transmission system described, since the reply packet includes the address of the terminal device, the master unit receives the reply packet in the same group and if the number of reply packets in the same group is 1, It is not necessary to generate and transmit the specified transmission packet, and the address of the terminal device in the interrupted state can be determined.

According to the invention of claim 4, claim 2
In the interrupt processing method of the time-division multiplex transmission system described, the master unit determines the priority order for each group in advance and generates the transmission packet for identifying the group based on the priority order, so the terminal unit is accessed. When it is desired to determine the priority order of the terminal, it is not necessary to allocate the terminals having the higher priority in order from the one having the smallest address value, and the addresses of the terminals can be freely allocated.

[Brief description of drawings]

FIG. 1 is a block diagram of a terminal of a time division multiplex transmission system according to an exemplary embodiment of the present invention.

FIG. 2 is a block diagram of a master unit of a time division multiplex transmission system according to an embodiment of the present invention.

FIG. 3 is an overall configuration diagram showing an example of a time division multiplex transmission system according to the present embodiment.

FIG. 4 is a format diagram of a transmission packet used in the present invention.

FIG. 5 is a waveform chart of a packet according to an embodiment of the present invention.

FIG. 6 is a flowchart showing an operation according to an embodiment of the present invention.

FIG. 7 is a waveform diagram of a reply packet showing that a plurality of terminals in the same group should interrupt.

FIG. 8 is an overall configuration diagram of a time division multiplex transmission system according to another embodiment of the present invention.

FIG. 9 is a block diagram of a master unit according to another embodiment of the present invention.

FIG. 10 is a table showing priorities stored in a priority determination unit according to another embodiment of the present invention.

FIG. 11 is a flowchart showing an operation according to another embodiment of the present invention.

FIG. 12 is an overall configuration diagram showing an example of a time division multiplex transmission system according to a conventional example.

FIG. 13 is a format diagram of a transmission packet according to a conventional example.

[Explanation of symbols]

 1 to 9 Terminal Device 10 Base Unit 11 Transmission Packet Reception Unit 12 Interruption State Detection Unit 13 Reply Packet Generation Unit 14 Reply Packet Transmission Unit 15 Timing Slot Matching Determination Unit 16 Address Group Storage Unit 17 Transmission Packet Generation Unit 18 Transmission Packet Transmission Part 19 Reply packet receiver 20 Priority judgment part L Transmission line

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[Procedure amendment]

[Submission date] January 27, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomohiro Hosokawa 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (4)

[Claims] 1. A plurality of terminals having unique addresses are connected to a master unit via a transmission line, the master unit divides the terminals into groups, and to which group the terminal belongs. Of the time division multiplex transmission system, in which the master device transmits a transmission packet to the terminal device to give control data, and at the same time, the terminal device returns the monitoring data to the timing slot provided in the transmission packet. In the interrupt processing method, when an interrupt request signal is issued from the terminal device, the master device generates and transmits a transmission packet having a timing slot for each group, and the terminal device receives the transmission packet. , When the self is in the interrupting state, a reply packet is generated at the timing of the timing slot of the group to which the self belongs and the reply packet is sent back to the master unit, and the master unit An interrupt processing method for a time division multiplex transmission system, characterized in that a group in an interrupt state is determined by the reply timing of a reply packet. 2. When the master unit determines a group in the interrupt state, the master unit identifies the group in the interrupt state, and a timing slot for each address of a terminal existing in the group. When the group identified by the transmission packet and the group to which the self belongs match, the terminal device recognizes that the transmission packet is for the group to which the self belongs, and the self is in an interrupt state. Sometimes, a reply packet is generated at the timing of the timing slot of its own address and sent back to the master unit, and the master unit determines the address of the terminal device in the interrupt state by the reply timing of the reply packet. 2. The interrupt processing method for a time division multiplex transmission system according to claim 1, wherein 3. By including the address of the terminal device in the reply packet, when the number of reply packets in the same group received by the master unit is one, the master unit is in an interrupt state. 2. The interrupt processing method for a time division multiplex transmission system according to claim 1, wherein the address of the terminal device can be determined. 4. The master unit determines a priority order for each group in advance, and generates a transmission packet specifying the group based on the priority order.
An interrupt processing method for the time division multiplex transmission system described.