JP2746201B2 - Bus connection control method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus connection control system for multiplexing a plurality of circuit units by time slots.

[0002]

2. Description of the Related Art Conventionally, in a bus connection control system of a circuit unit, in response to a bus connection request from a higher-order call processing unit, a bus connection state is compared with a bus connection state, a connection is established when the connection is released, and a time slot is set. And had Further, the bus connection control method is such that a bus release request from a higher-order call processing unit is released when the connection state and the time slot are compared and matched.

[0003]

In the conventional bus connection control system described above, when a situation occurs in which the bus connection of some circuit units is not released due to malfunction of the higher-order call processing unit, the bus cannot be released and the bus connection cannot be used. There was a problem that became impossible.

According to the present invention, a connection request is issued from an upper-level call processing unit in an inter-bus connection that is not disconnected and remains in a connected state because a connection release request is not issued from an upper-level call processing unit due to an error operation or abnormality. In this case, the circuit unit reports the connection state, so that the upper-level call processing unit requests the release of the connection unit and then requests the connection again to obtain processing and means for relieving malfunction.

[0005]

In order to achieve the above object, in a first method of the present invention, a higher-order call processing unit secures a time slot, requests connection of a circuit unit (3b, 3c), and The unit (3b) makes a connection response to the upper-level call processing unit with the connected circuit unit as abnormal, and the upper-level call processing unit requests connection release of the circuit unit based on the notified abnormality report;
The circuit unit releases the connection in response to the connection release request, and the upper-level call processing unit sets the circuit unit (3c, 3b), requests the connection, and performs normal connection processing of the circuit unit (3c, 3b).

According to a second apparatus of the present invention, in response to a bus connection request from an upper-level call processing unit, the circuit unit compares the bus connection state with the bus connection state and notifies the higher-level call processing unit of the bus connection state and the time slot. The processing unit has means for requesting release of the bus and circuit unit and requesting connection again.

[0007]

In the bus connection control method and apparatus configured as described above, the inter-bus connection unit which remains in the connected state without a connection release request due to an error operation of the upper-level call processing unit is provided. When a connection request is made from the upper call processing unit, a connection response is made with the connection state being abnormal, and the upper call processing unit requests a release of the notified circuit unit and requests a connection of a predetermined circuit unit again, thereby causing an error. It works to rescue that connection is disabled by operation.

[0008]

An embodiment will be described with reference to the drawings. FIG. 1 is a flowchart showing the processing of the present invention, and FIG. 2 is a system configuration diagram of the embodiment. As will be described later with reference to the flowchart of FIG. 1, in a bus-to-bus connection in which a connection release request is not made due to an error operation and a connection state is maintained, when a connection request is made from an upper-level call processing unit, the bus connection state and time The processing procedure of the present invention in which the upper-level call processing unit releases the above-mentioned connection unit by reporting the slot and then requests a new connection is described. Here, the case of connection, the case of release, and the case of error operation repair will be described in order.

When the circuit unit 3a and the circuit unit 3b are connected, the upper-level call processor stores the time slot empty / closed 1 from the upper-level call processor time slot management memory shown in FIG.
A time slot in which 2 is empty 0 is searched. In order to secure the searched time slot a, the circuit unit 3a, 3b is set in the connection unit setting areas 13, 14 with the time slot empty / occupied 12 closed. FIG.
Destination circuit unit setting area 3 for connection request signal shown in
1 is set to the circuit unit 3a, the connection time slot setting area 32 is set to the time slot a , the connection circuit setting unit 33 is set to the circuit unit 3b, and then connected to the circuit unit 3a via the host call processing unit and the inter-circuit unit bus 2. Request. The circuit unit 3a performs a search by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory of the bus connection control unit side shown in FIG. 4 in response to a connection request from the upper level call processing unit. Time slot a
Is not found, the time slot a is set in the time slot setting area 21. In addition, the circuit unit 3b
Is set in the connection partner circuit unit setting area 22. Normal 0 in the connection normal / abnormal 41 of the connection response signal shown in FIG.
The circuit unit 3 is set in the source circuit unit setting area 42.
a, setting the time slot a in the connection time slot setting area 43 and setting the circuit unit 3b in the connection circuit setting unit 44, and then responds to the upper call processing unit 1 via the upper call processing unit and the inter-circuit unit bus 2. . Upper call processing unit 1
Performs processing of successful connection when is connected normal / abnormal 41 normal 0 and you receive a connection response from the circuit unit 3a. Similarly to the above upper call processor time slot management memory of the time slots a corresponding connection circuit setting unit setting area 13 or is set to 14 circuit unit 3b the connection request signal for connecting recognition to the circuit unit 3b
Of the destination circuit unit setting area 31, a time slot a connection time slot setting area 32, via the upper call processing unit 1 and the circuit unit between the bus 2 after setting the circuit unit 3a to the connection circuit setting unit 33 Circuit
A connection request is made to the knit 3b . The circuit unit 3b performs a search by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory of the bus connection control unit in response to the connection request from the upper call processing unit 1 . Because retrieved not, set the time slot a time slot setting area 21, sets the circuit unit 3 a to the connection partner circuit unit setting area 22. Connection normal / abnormal 4
Normal to 0, circuit unit 3a in the source circuit unit setting area 42, time slot a in the connection time slot setting area 43, circuit unit 3b in the connection circuit setting unit 44, and then between the upper call processing unit and the circuit unit. A connection response is sent to the host call processing unit via the bus 2.

[0010] Top call processing unit 1 when releasing the connection of the circuit unit 3a and the circuit unit 3b, the upper call processing unit 1
The connection between the circuit units 3a and 3b is retrieved from the time slot management memory. The time slot empty / blocked 12 corresponding to the searched time slot a is set to empty 0, and the circuit unit 3a is set to the destination circuit unit setting area 51.
First, the time slot a is set in the release time slot setting area 52 and the circuit unit 3b is set in the release circuit unit setting area 53, and then each of the circuit units 3a and 3b is routed via the upper-level call processing unit and the inter-circuit unit bus 2. Request to release the connection. The circuit unit 3a releases the connection between the time slot a and the connection circuit setting unit 3b in response to a connection release request from the upper level call processing unit. Similarly, the circuit unit
In step 3b , a search is made by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory on the bus connection control unit side. If the circuit unit 3b corresponding to the searched time slot a and the circuit unit set in the connection partner circuit unit setting area 22 are the same, the unused 0 is set in the time slot setting area 21.

Next, a case will be described in which a connection release request is not made to the circuit unit 3b for connection with the circuit unit 3b from the higher-level call processing unit due to an error operation or abnormality. As shown in FIG. 1, when connecting the circuit unit 3b and the circuit unit 3c, the upper-level call processing unit determines, from the upper-level call processing unit time slot management memory, a time slot in which the time slot empty / blocked 12 is empty 0. Search for. The time slot a is secured, the time slot empty / occupied 12 is set to 1 and the circuit units 3b and 3c are set in the connection circuit setting unit setting areas 13 and 14. The circuit unit 3b is set in the destination circuit unit setting area 31, the time slot a is set in the connection time slot setting area 32, and the circuit unit 3c is set in the connection circuit setting unit 33. Request a connection to the circuit unit 3b . The circuit unit 3b performs a search by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory of the bus connection control unit in response to the connection request from the upper call processing unit 1 . If found, abnormal 1 is set in connection normal / abnormal 41, circuit unit 3b is set in source circuit unit setting area 42, time slot a is set in connection time slot setting area 43, and circuit unit 3a is set in connection circuit setting unit 44. Then, a connection response is made via the upper-level call processing unit and the bus 2 between circuit units. When a connection response is received from the circuit unit 3b, the upper-level call processing unit 1 sets the connection circuit setting unit setting area 1 of the upper-level call processing unit time slot management memory when the connection normal / abnormal is abnormal 1.
Set of circuit units 3a and 3b in 3 and 14
Compare and search for matches . If this combination is not searched, the circuit unit 3b is changed to the source circuit unit setting area 5.
1, the time slot a is set in the release time slot setting area 52, and the circuit unit 3a is set in the release circuit unit setting area 53, and then the connection is released to the circuit unit 3b via the higher-level call processing unit and the inter-circuit unit bus 2. Request. The circuit unit 3b sets the time slot a and the connection circuit setting unit 3 in response to a connection release request from the upper level call processing unit.
a is released. Further, the search is performed by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory on the bus connection control unit side. If the circuit unit 3a corresponding to the searched time slot a and the circuit unit set in the connection partner circuit unit setting area 22 are the same as each other, 0 is set in the time slot setting area 21.

[0012] Top call processing unit 1, a destination circuit unit circuit unit 3b in the setting area 31, the connection time slot setting area 32 to the time slot connection circuit higher call processing unit after setting the circuit unit 3 c of the setting unit 33 And a connection request via the bus 2 between circuit units. The circuit unit 3b searches by comparing with the time slot a notified to the time slot setting area 21 of the time slot management memory on the bus connection control unit side by the connection request from the higher-order call processing unit. If not found, the time slot a is set in the time slot setting area 21. The circuit unit 3c is set in the connection partner circuit unit setting area 22. The connection normal / abnormal 41 is set to 0, the circuit unit 3b is set to the source circuit unit setting area 42, the time slot a is set to the connection time slot setting area 43, and the circuit unit 3c is set to the connection circuit setting unit 44. A connection response is sent via the inter-circuit-unit bus 2. When a connection response is received from the circuit unit 3b, the upper-level call processing unit 1 determines that the connection normal / abnormal 41 is normal 0, and the connection circuit setting unit setting area 13 or 14 corresponding to the time slot a of the upper-level call processing unit time slot management memory. Are set in the destination circuit unit setting area 31, the time slot a is set in the connection time slot setting area 32, and the circuit unit 3b is set in the connection circuit setting unit 33. A connection request is made via the inter-unit bus 2. Thus, normal connection processing is performed for 3b and 3c.

FIG. 2 showing the present apparatus is, as described above, an upper call processing unit 1, circuit units 3a, 3b, 3c, bus connection control units 5a, 5b, 5c, an upper call processing unit and a bus 2 between circuit units. And a connection bus 6 between circuit units.

[0014]

As described above, according to the present invention, when the upper-level call processing unit multiplexes a plurality of circuit units by using time slots, the connection is not released due to an error or the like. Can be connected by releasing the connection.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a process according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram of an embodiment of the present invention.

FIG. 3 is a time slot management memory of an upper call processing unit according to an embodiment of the present invention;

FIG. 4 is a time slot management memory on the bus connection control unit side according to an embodiment of the present invention.

FIG. 5 is a connection request signal according to one embodiment of the present invention.

FIG. 6 is a connection response signal according to an embodiment of the present invention.

FIG. 7 is a connection release request signal according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-order call processing part 2 High-order call processing part and bus between circuit units 3a-3c Circuit unit 5a-5c Bus connection control part 6 Connection bus between circuit units 11 Index by time slot 12 Time slot empty / closed (0/1) setting Area 13, 14 Connection circuit setting unit setting area 21 Time slot setting area 22 Connection partner circuit unit setting area 31, 51 Destination circuit unit setting area 32, 43 Connection time slot setting area 33, 44 Connection circuit setting unit 41 Normal connection / Abnormal (0/1) setting area 42 Source circuit unit setting area 52 Release time slot setting area 53 Release circuit unit setting area

Claims (2)

(57) [Claims] 1. A bus connection control method in which a plurality of circuit units are multiplex-connected by time slots and connected / released via a bus in response to a request from an upper-level call processing unit, Based on the outgoing request
Both times to the appropriate connection request specified by the time slot Hazuki
Sends the road unit, as a response, is abnormally reported from the appropriate circuit unit that due to malfunction or abnormal in a state of not being released bus connections from previous connection
Then , the upper-level call processing unit performs time slotting based on the abnormality report.
Connection circuit unit name and its own time slot management
Compare the connection circuit unit name of the time slot in the memory
If the same connection name is not found, the
The circuit that reports the release request that requests the release of the slot
To the unit, and the release request causes the abnormality report source circuit unit to
Release the release time slot and report the release
Sending to the processing unit, and releasing the upper-level call processing unit from the abnormality report source circuit unit.
By receiving the report, by the time slot
A bus connection control method, comprising a step of retransmitting a connection request . 2. A time division multiplex communication time slots, data
A plurality of circuit units having means for setting and storing a bus connection state by the time slot, a plurality of connectors for connecting each circuit unit to the bus, and a time slot for a call connection request according to a transmission request at the request of the circuit unit. In a bus connection control device having a higher-order call processing unit for designating and transmitting to a corresponding circuit unit, the circuit unit compares a bus connection request from the higher-order call processing unit with a bus connection state, and specifies a designated time slot.
Connected to the specified time slot when
Connected, the indicated time slot has not released the previous connection
When detecting that the connection release request including the abnormality report to the upper call processing unit, the upper call processing unit, when receiving the connection release request,
At the specified time slot, the connection release request
Check the connection of the circuit unit
After the confirmation, means for sending a connection release instruction to the connection release request circuit unit, and receiving a release notification from the connection release request circuit unit
And a means for retransmitting the connection request.