JPS6065640A - Exchange device - Google Patents

Abstract

PURPOSE:To utilize effectively the high-speed transmission performance of a ring-form transmission line by performing the communication between terminal devices accommodated in different exchanges connected to the ring-form transmission line via a slot assigned dynamically by a ring management device. CONSTITUTION:The exchanges 2a-2c and the ring management device 3 are connected in series in ring form by a ring-form transmission line 1, and terminal devices 41a, 41b, 41c and 42c respectively. The transmission line 1 transmits information by using a frame subjected to time division multiplex for a slot of a prescribed time length and the device 3 assigns the slot to a request from the exchange. The exchanges 2a-2c consist of an interface IF section channel switch section of ring and line connected to the transmission line and the terminal devices respectively, a channel memory section and a processing processor section. The communication between the terminal devices 41c and 42c connected to the same exchange is performed via the IF section, and the information is transmitted or received via the transmission line from the IF section by using the slot assigned by the device 3 for the communication between terminal devices accommodated in different exchanges.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a switching device in which a plurality of switching devices accommodating distributed terminals and a ring management device are connected to a ring-shaped transmission path.

[Advanced technology]

Conventionally, in this type of switching equipment, a ring-shaped transmission path is time-divided into slots of a fixed time length, information is transmitted using these time-division multiplexed frames, and a ring management device allocates slots in response to slot allocation requests from the exchange. However, in order to connect each terminal and perform all communications, a large number of communication path memories and communication path switch memories are required inside the exchange. There was a drawback that the control was complicated.

[Summary of the invention]

This invention was made with the aim of improving the drawbacks of the conventional ones as described above, and is a switching device in which a plurality of switching devices accommodating terminals and a ring management device are connected in series in a ring shape through a ring-shaped transmission path. In the case of communication between terminals connected to the same exchange, the information from this terminal is sent to the other terminal via the exchange, and in the case of communication between terminals connected to different exchanges, the information from this terminal is sent to the other terminal via the exchange. is sent from the exchange to the ring-shaped transmission line through the nine slots allocated in the ring management device, received by the exchange of the other terminal, and sent to the other terminal, thereby achieving high-speed transmission on the ring-shaped transmission line. The purpose of the present invention is to provide an exchange device that makes it possible to exchange voices, 1i7ii images, data, or other information by effectively utilizing the characteristics of the present invention, and that allows easy control thereof.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a switching device that is an embodiment of the present invention. In the figure, 1 is a ring-shaped transmission l
i! 8-2a, 2b, and 2c are exchanges A, B, and C, respectively.
13 is a ring management device, 41a is a switch (A) 2a
Terminal IA, 41b connected to exchange (B) 2 b
Terminals IB, 41c and 42c are connected to the exchange (C) 2c, respectively.
151a is from terminal (IA) 41a to terminal (IB) 41b
Information sent from B (41b) to terminal IA (4] a) lc, 5] c is terminal (IC) 4], information sent from C to terminal (2C) 42C, 52c is the terminal (2C) 42C is the terminal (IC)
) 41C. In FIG. 1, each switch (A) 2a.

Terminal (IA) 41a connected to exchange CB) 2b
An example of communication operation between the terminal (II3) 41b and the terminal (II3) 41b is shown in FIG.

Information 51a sent from the terminal (IA) 41a is sent to the exchange (
It is sent to the ring-shaped transmission line 1 via A) 2a, and is received by the terminal (IB) 41b via the exchange CB) 2b. Similarly, information 51b from the terminal (IB) 41b
ij is sent from the exchange (B) 2 b to the ring-shaped transmission line 1, and is sent to the terminal (IA) 41 via the exchange (A) 2 a f.
received by a. In addition, in Figure 1, the switchboard (
C) 2 The terminal (IC) 41C connected to c and the terminal (
2C) An operational example of communication with 42C is also shown. Information 51C sent from the terminal (IC) 41) is sent to the exchange (C
) 2c, and is sent to the terminal (2C) 42C without being sent out to the ring-shaped transmission path 1. Similarly, the terminal (
2C) Information 52C from 42c is the exchange (U) 2C
is directly sent to the terminal (IC) 41c.

FIG. 2 is a format diagram showing time division multiplexed frames on a ring-shaped transmission path in the switching device of FIG. In the figure, 6 is a frame, 61 is a synchronization signal slot section, 62 is a common channel signal slot section, and 63 is a data slot section Σ. The frame 6 is constituted by a fixed number of continuous slots obtained by time-dividing the ring-shaped transmission line 1 into slots of a fixed time length. The frame 6 also includes a synchronization signal slot section 61. Common line signal slot section 62. It is divided into data slot sections 63. The synchronization signal slot section 61 is
It is used to carry a synchronization signal for the ring management device 3 and each exchange (A to C) 2a to 2c to operate in synchronization. The common channel signal slot section 62 is connected to the ring management device 3.
The slots of the data slot section 63 are used to transmit trunk line control signals, which will be described later, between the exchanges (A to C) 2a to 2c, and the slots of the data slot section 63 are used to transmit audio 9 images, Used for transmitting data or other information. Further, the ring management device 3 centrally and dynamically determines which slot of the data slot section 63 to use for information transmission between terminals.
Trunk line control signals such as requests for slot allocation and instructions on slots to be used are sent using slots in the common line signal slot unit 62 between the ring management device 3 and the exchange to which the terminals are connected.

3 and 4 are block diagrams showing frames on a ring-shaped transmission path in the switching device shown in FIG. 1 and communication operations between terminals connected to different switching devices, respectively. In the figure, frame 6 is the slot SYN of the synchronization signal slot section 61, and the slot S of the common line signal slot section 62.
A, SB, SC, and slots DO to D7 of the data slot unit 63, which circulate clockwise on the ring-shaped transmission line 1 and connect the terminal (IA) 41a and the terminal (
xB) It is assumed that the 4xbo information is transmitted using Nislot DO. The slot SA of the common line signal slot section 62 is used to exchange trunk line control signals between the exchange (A) 2a and the ring management device 3, and similarly, the slots SIT and SC are Each exchange (B)
2, b.

(C) Used between 2c and the ring management device 3.

Note that the allocation of the thrower) DO has already been performed by the ring management device 3, and each exchange (4,) 2a, (B) 2b
K has been notified. In FIG. 3, when the exchange (A) 2a receives slot 1) 0, it receives information 51 from the terminal (IB) 41b in slot DO.
B is imported, information 51a from the terminal (IA) 44a is placed on the thrower) DO, and the imported information 51
b is sent to the terminal (IA) 41a. In the 4th picture of drunkenness,
When the Slower DO comes around to the exchange (B) 2 b, it takes in the information 51a from the terminal (IA) 41a in the Thrower DO and sends the information to the terminal (1, 13) 411 instead.
The information 51b from 1 is placed on the thrower) DO, and the captured information 51a is sent to the terminal (lB) 41b.

FIG. 5 is a block diagram showing the configuration of an exchange in the converter of FIG. 1. Figure 5 shows - as an example a switchboard (
A) The configuration of 2a is shown and the other exchanges are similarly configured. In FIG. 5, 7 is a ring interface section, 8 is a line interface section, 9 is a channel switch section, 10 is a channel memory section, 11 is a processor section, 12 is an address line, 13 is a data line, and 14 is a channel interface section. is a slot number line, 15 is a line number line, 16 is an output address line, 17. z, ring input data line, 1B is ring output data line, 19 is line input data line, 20
is the line output data line. The ring interface unit 7 sequentially receives information in the frames 6 circulating on the ring-shaped transmission line 1 in units of slots, and passes the received information to the channel memory unit 10 via the ring input data line 17. At the same time, the receiver notifies the channel switch section 9 and the channel memory section 10 of the slot number indicating which slot in the frame 6 the received information belongs to via the slot number line 14, respectively. The ring interface unit 7 also receives information from the channel memory unit 10 via the Schilling output data line 18, and sends it to the Schilling-shaped transmission line 1. If frame 6 is composed of n slots, the slot numbers are O → 1 → 2 →...
→n−1→0 changes periodically and cyclically.

That is, when the ring interface section 7 detects the synchronization signal in the synchronization signal slot section b1 of the frame 6, the slot number is set to 0, and each time a subsequent slot is detected, the slot number is incremented by 11".The line interface section 8 has the function of transmitting and receiving information to and from terminals, and sequentially passes information from the terminals to the communication path memory unit 1o via the line input data line 19.At the same time, it also checks which terminal the passed information is from. The indicated line number is notified to the communication path switch section 9 and the communication path memory section 1o as line number !15.Here, it is assumed that there is a one-to-one correspondence between the terminal and the line number in advance.

In addition, the line interface section 8 sends information to be sent to the terminal corresponding to the notified line number to the receiving terminal via the communication path memory section 10 and the line output data line 2°. If the maximum number of terminals that can be connected to an exchange is m, then the line number is 0→1→2→・・・・・・→m−
The line number changes periodically and cyclically from 1 to 0, and the time it takes for the line number to go around is the same as the time that the slot number detected by the ring interface section 7 goes around.

FIG. 6 is an explanatory diagram showing the correspondence between slot numbers and line numbers in the exchange shown in FIG. 5. FIG. 6 shows the number of slots fcn within one frame of frame 6.
= 64, the order of slot numbers 141 is shown, and the maximum number of terminals that can be connected to the exchange is m-16.
and the order of the line numbers 151 is shown.

FIG. 7 is a block diagram showing the configuration of the communication path switch section in the converter shown in FIG. 5. In the figure, 91 is a ring channel switch memory, 911 is a ring access prohibition bit, 912 is a hard address bit, and 92 is a line channel switch memory. The ring channel switch memory 91 is a random access memory configured with the same number of words as the number n of slots in one frame 6. Using the slot number 141 given by the slot number gland 14 as an address from the ring interface section 7, the contents of the ring channel switch memory 91 are read out and passed to the channel memory section 10 via the output address line 16, and the contents are read out. The contents of the channel memory section IO are read out using the address bit 912 of the address bit 912 as an address. At this time, if the ring access prohibition pin 91.1 is "0", the contents from the communication path memory section 10 are passed to the ring interface section 7 and sent to the ring-shaped transmission path 1; 1", it is not sent. The line communication path switch memory 92 includes a line interface section 8, which is a random access memory composed of as many words as the maximum number of terminals (m) that can be connected to the exchange (A) 2a, and a line number line]5. Line number 1 notified by
51 as an address, the contents of the line communication path switch memory 92 are read out and passed to the communication path memory section 1o via the output address line 16, and the contents of the communication path switching section 10 are read out using this content as an address. and passes it to the line interface section 8.

FIG. 8 is a block diagram of the configuration of the communication path memory unit in the exchange shown in FIG. 5. In the figure, 101 is a ring channel memory, and 102 is a line channel memory. The ring channel memory H1l is a random access memory composed of the same number of words as the number of slots n in one frame 6. And ring channel memory 10
1, the f# information in the frame 6 sent from the ring interface unit 7 via the shilling input data i1!17 is sequentially written with the slot number 141 as an address.

Further, the contents of the signal sent from the line channel switch memory 92 via the multi-output address line 16 are read out as an address, and are passed to the line interface unit 8. Line call path memo'J 102 has a switchboard (A
) 28K It is a random access memory composed of the same number of words as the maximum number of connectable terminals m. In the line channel memory 02, information from the terminal sent from the line interface section 8 through the line input line 9 is sequentially stored as a line number 151 address. Further, the presence of the signal sent through the multi-output address line 16 in the ring communication path switch memory 91 and the JD line communication path switch memory 92 is read out as an address, and each ring interface unit 7 or It is passed to the line interface unit 8.

8r! , 9 and 10 are block diagrams showing the operation of communication between terminals connected to different exchanges in the switching apparatus of FIG. 1, respectively. Figures 9 and 10 show, for example, an exchange (A), a terminal to be connected to an exchange (A), and an exchange (B).
) 2b shows the operations of the communication path switch section 9 and the communication path memory section 10 in the exchange (A) 2a when communication is being carried out between the terminals of the communication system (A) 2b.

Here, the number of slots in one frame 6 'tn,! = [,
, the maximum number of terminals that can be connected to exchange (A) 2 a is m, and the terminal on the first line (line number = 1) of ``Z exchange'' rM (A) 2 a is connected to the second slot (slot number = 2) via exchange (I3) 2
Assume that communication is being performed with terminal b. In addition, "o" is set in the ring access prohibition bit 911 at address position 8N2 of the ring path switch memory 91 in the processing processor section 11, and 1LN is set in the address bit 912.
``5N2J'' is written in address position @LN1 of line channel switch memory 92 via address line 12 and data line 13, respectively.

FIG. 9 shows that the information of the second slot of frame 6 is written to the ring channel memory 101, and the information of the terminal of the first line is read out from the line channel memory 102 and passed to the ring interface unit 7. This shows the flow of signals until the Now, when the ring interface unit 7 is notified of the system slot number (=2) and passed the information (=D2), the information (=D2) is written to the address position SN2 of the communication channel memory 101 for the ring interface according to the slot number. It will be done.

At the same time, the address (=,, J, Nl) of the channel memory section 10 to be read out according to the slot number is read out from the word of the address position SN2 of the ring channel switch memory 91. Read out the information on the line channel memory 102 using LNl, J as the address (,=dl
) is read out, and the access prohibition bit 9]1 of address position i SN2 in the ring channel switch memory 91 is set to "
0'', it is passed to the ring interface unit 7 and placed in the second slot of the frame 6. In the example shown in FIG. 9, the above operations are performed every time the slot number is "2". Generally, for each slot number, loading into the ring channel memory 101, reading from the ring channel switch memory 91, and reading from the line channel memory 102 according to the contents are performed periodically. It is carried out regularly and cyclically.

In FIG. 10, the information of the first line terminal is written to the line channel memory 102, and the information of the second slot is read out from the ring channel memory 101 and passed to the line interface unit 8. This shows the signal flow.

Now, line interface part 8, Shiraino nano bar (=
1) is notified and the information (=dl) is passed, the information (=d 1 ) is inserted into the address positions I and Nl of the line number Nyoshiraino call path memory 102. At the same time, the address (=SN2) of the communication path memory unit 1° to be read out according to the Rhino number is read out from the word of the address position LNI of the line communication path switch memory 92. Reading: tAtk3 "5N2J is the address and communication route memo IJIOI information N(=D2)i
E is read out and passed to the terminal of the first line via the line interface section 8. In the example shown in FIG. 10 above, the above operation 1 is performed within the period when the line number is "1". Generally, for each line number, it is stored in the line communication path memory 102, read out from the line communication path switch memory 92, and read out from the communication path memory section 10 according to the contents periodically. It is carried out cyclically.

11 and 12 are block diagrams showing the operation of communication between terminals connected to the same exchange in the switching device of FIG. 1, respectively. FIGS. 11 and 12 show, for example, when communication is being carried out between terminals connected to the exchange (C) 2c, the communication path switch section 9 and the communication path memory section 10 in the exchange (C) 2C. It shows the operation. Here, the maximum number of terminals that can be connected to exchange (C) 2c is km, and communication is being performed between the terminals on the Oth line (line number = O) and the terminals on the second line (line number - 2). Then, the processor unit 11 sets 1LN to the address position i LNO of the line channel switch memory 92.
2J is written in the address position LN2 via the address line 12 and the data line 3, respectively.

FIG. 11 shows the process from when the information of the Oth line terminal is written to the line channel memory 102, until the information of the second line terminal is read out from the line channel memory 102 and passed to the line interface unit 8. shows the signal flow. Now, when the line interface section 8 is notified of the line number (=0) and passed the information (=dO), the line number is changed to the address position LN of the Q-line channel memory 102.

Information (-dO) is written to. At the same time, the address (,=LN2) of the communication path memory unit 1° to be read out according to the line number is stored in the line communication path switch memory 92.
The word at address location LNO is read out. Information (=d 2 ) in the line communication path memory 102 is read out using the read out "LN2" as an address, and is passed to the terminal on the 0th line via the line interface unit 8. In the example shown in FIG. 11, the above operations are performed within the period when the line number is rOJ.

In FIG. 12, as in FIG. 11, the information of the terminal on the second line is written into the line channel memory 102 K 4F, and the information on the terminal on the 0th line is read out from the line channel memory 102. The flow of the signal is shown until it is delivered to the line innotaface unit 8.

In the above embodiment, the present invention is applied to the exchanges (A-C) and 2a to 2C that are interconnected by the ring-shaped transmission line 1. It is clear that the present invention can also be applied to switching equipment using multi-point connection type transmission lines.

〔Effect of the invention〕

As explained above, in a switching device in which a plurality of switching devices accommodating terminals and a ring management device are connected in series through a ring-shaped transmission path, communication between terminals connected to different switching devices is carried out via a ring management device. The structure allows communication to be performed via slots that are dynamically assigned by the management device, as well as communication between terminals connected to the same exchange, which improves the high-speed transmission performance of the ring-shaped transmission line. It is possible to easily exchange audio, images, data, or other information by effectively utilizing the information, and the control is extremely simple by reducing the communication path memory and communication path switch memory in the exchange. It has excellent effects in that it can be carried out in many different ways.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a switching device that is an embodiment of the present invention, FIG. 2 is a format diagram showing time division multiplexed frames on a ring-shaped transmission path in the switching device of FIG. 1, and FIG. and FIG. 4 are block diagrams showing frames on a ring-shaped transmission path in the switching device of FIG. 1 and communication operations between terminals connected to different switching devices, respectively.
1 is a block diagram showing the configuration of the switching device in the switching device shown in FIG. 1, FIG. 6 is an explanatory diagram showing the correspondence between slot numbers and line numbers in the switching device shown in FIG. Figure WJ8 is a block diagram showing the configuration of the communication path memory unit in the exchange shown in Figure 5, and Figures 9 and 10 are respectively for the first conversion. FIGS. 11 and 12 are block diagrams showing the operation of communication between terminals connected to different exchanges in the apparatus, and FIGS. 11 and 12 are block diagrams showing the operation of communication between terminals connected to the same exchange in the exchange apparatus of FIG. 1, respectively. In the figure, 1... ring-shaped transmission line, 2a to 2c...
・Switchboard (, A-C), 3...Ring management device, 41
a~41c, 42cm...terminal, 51a~5]c
+ 52cm information, 6... Frame, 61... Slot section for synchronization signal, 62... Slot section for common line signal, 63... Data slot section, 7... Ring interface section, 8...・Line Inotaph Ace Club, 9・
...Call path switch section, 91... Ring path switch memory, 911... Ring access prohibition bit,
912 Address bit, 92 Line channel switch memory, 1o... Channel memo IJ section, 101
... Ring channel memory, 102... Line channel memory, 11... Processor section, 12...
Address line, 13...Data line, 14...Slot number line, 141...Slot number, 15...
・Rhino Natsuba-1m, 151-・Line number,
161. Output address line, 17... Linog input data line, 18... Ring output data line, 19... Line input data line, 2o... Line output data line. In each figure, the same reference numerals indicate the same or complementary parts. Agent Masuo Oiwa Figure 11 Figure 12 Procedure amendment (from @) 3. To Hitoshi Katayama, representative of the person making the amendment, Part 5: Subject of the amendment: ``Detailed Description of the Invention'' column of the specification and drawings. 6. Contents of amendment (1) [Terminal I B (41
Correct month b to "Terminal (113) 41bJ. (2) Correct "Terminal I A(
41a ) J is corrected as [terminal (IA) 41aJ. (3) In the same d, page 7, line 4, “link-shaped transmission path J,
"On ring-shaped transmission line 1" and "frame"
Frame 6". (4) Amend "is" in the 6th line of page 12 of the same document to "is." (!3) Figure 3 of the attached drawings has been amended as shown in the attached sheet.

Claims (1)

[Claims] A plurality of exchanges accommodating terminals and a ring management device are serially connected through a ring-shaped transmission path, and the ring-shaped transmission path transmits information in frames that are time-division multiplexed into slots of a certain length of time. In the switching device in which the ring management device allocates slots in response to a slot allocation request from the switch, the switch has a ring interface unit connected to the ring-shaped transmission path, a line connecting the terminals, Interface section 2 Communication path switch section 1
The ring interface section is configured to include a communication path memory section and a processing processor section, and the ring interface section sequentially writes information received from slots of frames transmitted through the ring-shaped transmission path into the communication path memory section. the line interface section has means for sequentially writing information received from terminals connected to the local exchange into the channel memory section; A terminal connected to the ring-shaped transmission path via the ring interface section or to the local exchange via the line interface section reads the information sound written in the communication channel memory section during instruction. In the case of communication between terminals connected to the same exchange, the information from this terminal is sent to the other terminal via the exchange, and the information is transmitted between terminals connected to a different exchange. In this case, the information from this terminal is sent from the exchange to the ring-shaped transmission path using the slot allocated and allowed by the ring management device, received by the exchange of the other terminal, and sent to the other terminal. An exchange device characterized by: