JPH01240050A - Self-routing exchanging system - Google Patents

Abstract

PURPOSE:To set a speech path by the number necessary for a call in a self- routing switch circuit by setting plural speech pathes prior to the reception of the information cell at the time of a change for a generated call. CONSTITUTION:A call processing part 5 to a call generated in an incoming highway 2 registers control information of the number necessary to correspond the identification information of the call. When information on the call is inputted, the information cell is accumulated in a buffer 8. A table 16 is drawn with the identification information of the information cell read out from the buffer 8 by a reading-out means, the control information is read out, the respective pieces of control information from the table 16 are successively added to the data information of the information cell read out from the buffer 8 and transferred to a self-routing switching circuit 30. Thus, the data information of the information cell is set in the table 16 at the time of the generation of the call and sent out to an output highway through the speech path of prescribed number to be autonomously successively formed by the control information successively read out.

Description

[Detailed Description of the Invention] [A] Regarding a self-routing system that sets a plurality of pieces of control information for a call, the purpose is to distribute and connect each call to a plurality of outbound highways, and to perform switching based on the control information. In a self-routing switching system using a self-routing switching circuit, a buffer is used to store information cells about calls input via an incoming highway, and a table is used to register a required number of control information corresponding to call identification information. , a call processing unit that responds to a call that occurs on a major highway and registers control information necessary for the identification information of the call in the table; readout control means for causing addition of each piece of control information read from the table in correspondence with the identification information in the read information cell to the data information; the additional output of the control means is sent to the self-routing switching circuit; configured to transfer.

[Industrial application field]

The present invention relates to a self-routing exchange system for setting multiple pieces of control information for a call.

In telephone switching (circuit switching), once a communication path is established, the communication path is maintained until the call is terminated. In the case of multiplex transmission, each call (channel) can be switched quickly, but
Since the position of each call on the frame is constant, simple sequential switching is sufficient. On the other hand, in packet switching, each packet has its own destination, and the destinations of each packet in chronological order are different, so the above two methods cannot be adopted. A method of distributing the data to outgoing lines (memory exchange) is used. However, since this memory exchange takes time, it is not suitable when high-speed exchange is required.

A self-routing channel is particularly suitable in cases such as high-speed packet switching, where it is not desirable to centrally control the channel from the outside using software when switching packets to different outgoing lines at high speed. In a self-routing communication path, a correspondence table is created between the identification number (VCN) of each call and the number of its outgoing line, and when a call with identification number i comes, the system checks the correspondence table to find out the outgoing line number j and handles the call. Packet exchange is performed by sending out to outgoing line j.

[Conventional technology]

A Banyan type is shown in FIG. 5 as an example of a conventional self-routing channel. This is composed of 2 x 2 unit self-routing switches stj (jj is 11, 12, etc.) connected in reverse shirt full wiring as shown in the figure (in this example, 8
8 for Banyan self-routing channels),
Each packet on the incoming line has control information indicating the outgoing line (in this example, the outgoing line number in binary display), and each packet is operated using this control information to send the packet to the specified outgoing line. For example, if the control information is 010 and this packet is input to S, then this first stage (i=1) switch
Since B is 0, it sends this packet to its own number 0 output, and in response to this, SKI looks at the next bit of the MSB, and since this is 1, it sends it to its 1st output, and In response, S3t looks at the LSB and, since it is 0, sends it to output No. 0, and thus the packet is sent to the target outgoing line No. 010.

This Banyan type self-routing channel increases the number of incoming/outgoing lines, e.g. 16 x 16 B
To set it to any, do as shown in Figure 6. That is, 4 X
4 Line up two Banyans, line up four 2X2 unit switches on the output side, and connect them as shown in the diagram to make 8 x 8
Construct a Banyan and similarly ie 8 X 8 B
Arrange 2 anyans and install 4 2x2 unit switches on the output side.
Arrange 2 × and connect as shown to make 16 × 16 B
Make it any.

32 x 32 Banyan etc. can be constructed in the same manner.

In general, in the case of N x N Banyan, 2 x 2 unit switches can be connected in log N stages in cascade and the information can be sent to the target outgoing line. In a unit switch, the output terminal has twice the operating speed of the input terminal to avoid interference.

[Problem to be solved by the invention]

Since Banyan type self-routing channels are constructed based on the dichotomy principle, scaling is possible with NX
This is done by combining two N switches and N 2X2 switches to create a 2NX2N switch.
Expansion units are doubled, making it difficult to configure a module, and all wiring must be rewired on the outgoing wire side.

Furthermore, even if such an expansion is performed to increase the path (communication path) capacity, only one path can be set in the self-routing path for each call. The call cannot be connected to multiple outgoing lines via a self-routing channel.

The present invention was created in view of the above problems, and an object of the present invention is to provide a self-routing switching system capable of distributing and connecting each call to a plurality of outgoing highways.

[Means to solve the problem]

FIG. 1 shows a block diagram of the principle of the present invention. The present invention
In the self-routing switching system, the self-routing switching circuit 30 switches the call on the incoming highway 2 using its control information, and sends the call on the incoming highway 2 to the outgoing highway 3 designated by the control information. This has been improved so that it can output to multiple outgoing highways.

To this end, the system is provided with a buffer 8 for storing information cells about calls input via the input highway 2.
, a table 16 for registering a required number of control information corresponding to the identification information of the call, and a table 16 for registering the required number of control information corresponding to the identification information of the call in response to a call occurring on the input highway 2; 16, the reading of the buffer 8 and the table 16, and the correspondence between the data information in the information cell read from the buffer 8 and the identification information in the read information cell. A read control means 21 for causing addition of each control information read from the table 16 is provided, and the read control means 21
The additional output of the self-routing switching circuit 30
The system is configured to autonomously set up a plurality of communication route buses for one call.

[For production]

The call processing unit 5 that responds to a call that occurs on the incoming highway 2 registers as much control information as necessary in the table 16 in correspondence with the identification information of the call.

When information cells for the call are input, they are stored in the buffer 8. Then, the control information is read by pulling the table 16 with the identification information of the information cell read from the buffer 8 by the read control means, and each control information from the table 16 is added to the data information of the information cell read from the buffer 8. are sequentially added and transferred to the self-routing switching circuit 30.

Thus, the data information of the information cell is set in the table 16 at the time of the call, and sent out onto the corresponding output highway 3 via a predetermined number of communication path paths that are formed autonomously and sequentially with control information that is read out sequentially. Ru.

〔Example〕

FIG. 2 shows an embodiment of the invention. In this figure, 2
．． (i=1, 2...N) is an input highway, and this input highway 2. The information cell to be exchanged is input to the broadcast channel bus setting information adding section 61 via the . The information cell contains data information INF and identification information VCN (Virtu
al Channel Nun+ber). 5
is a call setting section common to the six call route bus setting information addition sections, and is a call setting section common to the six sections. Answer the call above.

Broadcast channel bus setting information addition unit 6. is FIFO Hara 7
Y8! , INF/VCN separation circuit 1
01, INF register 12i, INF/NVCN coupling circuit 14i, VCN exchange and RH addition table 16t,
NVCNMRH register 188, circular connection number counter 2
0i and selectors 22 and 24i. P I
FO8i corresponds to buffer 8 in Figure 1, and INF/
VCN separation circuit 10i, INF register 12LST
NF/NVCN combination circuit 14i.

NVCN and RH register 18i1 Report connection number counter 2
04 and selector 22. ．． 24□ corresponds to the readout control section 21 in FIG.

The FIFO buffer 81 sequentially accumulates each information cell from the input highway 2i in the order of input, and outputs it in that order. IN
F/VCN separation circuit 10. separates INF and VCN of the cell output from the FIFO buffer 8i. The separated INF is temporarily stored in the register 12i. VCN
Different required number of CV (number of broadcast connections) and RH for each response
(Call Route Bus Control Information) and NVCN (New Information Identification Number) are registered. The register 18t is provided with a storage section for temporarily storing the registration information corresponding to each registration area read from the table 16□. The counter 201 receives the value of the C2 storage section REG of the register 18i through its down-count input, and counts down from that value in each self-routing basic time unit. Selector 22+ and 2
4. The counter 20 stores the values of the RH storage units REG, , and the corresponding value of the NVCN storage unit REGi2, respectively.
．． The output is performed sequentially using the sequential output count values.

The output value of the selector 228 is the INF/NVCN combination circuit 1
48 and the output value of selector 24□ is applied directly to self-routing switching circuit 30. The self-routing switching circuit 30 is capable of autonomously setting a communication path within the self-routing switching circuit 30 in response to the RH, an example of which is disclosed in Japanese Patent Application No. 176466/1983 by the present applicant. It is disclosed.

The operation of the present invention having the above configuration will be explained below.

Entering Highway 2. When a call occurs in the call setting mode for that call, the call processing unit 5 selects the number j (
RH and NVCN of only 1≦j≦M and CV (=j
) is registered in the table 164 in correspondence with the call identification information. Each of the information cells (packets) subsequently transferred via the input highway 28 is stored in a FIFO buffer 8. are concatenated in the order of input. The oldest information cell in the FIFO buffer 8i is initially read out from the FIFO buffer 81 under the control of the call processing unit 5, and thereafter in response to a cell read request signal from the counter 20. The read cells are sent to the INF/VCN separation circuit 10. is separated into INV and VCN, and the separated INF is stored in register 12.
It is temporarily stored in i.

The separated VCNs are shown in Table 16. This address is used to retrieve the table 168, and the table contents corresponding to that address are read from the table 16°. The read contents are a number of RH and NVCN pairs preset corresponding to the input VCN and a CV indicating the number, and these are temporarily stored in the corresponding storage section of the register 184.

The contents of the CV storage section REC; of the register 18i, ie, the number of broadcast connections (CV), are sent to the counter 20□, and are counted down every basic self-routing time unit. Counter 20. The output values sequentially output from selector 2
2. and selector 22 as a switching signal for 241
, and 24. is applied to.

Selector 22. NVCN sequentially output from register 12. INF and NV of the register 128 are combined with the INF of the register 128 and supplied to the self-routing switching circuit 30 along with RH sequentially output from the selector 24.
The CN is output to the corresponding outgoing highway via a communication path that is autonomously determined by successive RHs.

Thus, the information INF input from input highway 2□
can be exchanged and output to a predetermined number (broadcast number) of output highways through the exchange process.

An example of the self-routing switching circuit 3o is the one disclosed by the applicant as described above, which can be summarized as follows. For convenience of explanation,
The self-routing switching circuit 30 consists of nine unit switches S,...Sl, connected in three stages (see Fig. 3), and each unit switch has a plurality of inputs and outputs. It is assumed that the information given to the input by the control information RH can be switched and output to the output specified by the control information RH added thereto.

The operation of the unit switch will be explained with reference to FIG. 4 as follows.

The detection circuit I+ (i=1.2.3) extracts the control information RF (from the input information (packet with NCV and RH added) to the decoding circuit DEC,
If the control information RH indicates output #j, the demultiplexer DM is controlled to input the input information from the information delay circuit to the FIFO memory FiJ (j=1
．． 2.3) and store it there.

Request signal K i from that FIFO memory F city
A control circuit DS constantly scans FIFO
The input information stored in the memory Fij is output #
Output to j.

As is clear from the above, the present invention can be implemented not only with the self-routing switching circuit shown in FIGS. 3 and 4, but also with a Banyan type circuit. It should be obvious from there.

〔Effect of the invention〕

As described above, according to the present invention, when exchanging a call, multiple communication paths are set prior to receiving the information cell, so that the self-routing switching circuit has only the number necessary for the call. A communication path can be set.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a diagram showing an embodiment of the invention, Fig. 3 is a diagram showing a self-routing switching circuit, Fig. 4 is a block diagram of a unit switch, and Fig. 5 is a diagram showing a self-routing switching circuit. is a block diagram explaining the conventional example, and FIG. 6 is a block diagram explaining the conventional example. In Figures 1 and 2, 2.2. is an incoming highway, 3 is an outgoing highway, 5 is a call processing unit, 8 is a buffer (FIFO8i), 16 is a table (VCN conversion and RH addition table 161)
), 21 is a read control unit (INF/VCN separation circuit 10,
, NF register 12i, INF/NVCN coupling circuit 1
4. , NVCN/RH register 181, relay connection counter 203, selectors 22i, 24,). Iwaoka, l;cNgin Beak Cto's ■ 1 Mad Sui Hano Yellow - Figure 4

Claims (1)

[Claims] (1) The self-routing switching circuit (30) switches the call on the incoming highway (2) using the control information to route the call on the incoming highway (2) to the outgoing highway (3) specified by the control information. In the self-routing exchange mode, a buffer (8) stores information cells about calls that are input via the input highway (2)
), a table (16) for registering the required number of control information corresponding to the identification information of the call, and a table (16) for registering the necessary number of control information corresponding to the identification information of the call in response to a call occurring on the input highway (2). The control information is stored in the table (
16); and a call processing unit (5) for reading out the buffer (8) and the table (16), as well as inputting information into the data information in the information cell read out from the buffer (8). readout control means (21) for causing addition of each piece of control information read from the table (16) in response to identification information in the information cell; and additional output of the control means (21) is controlled by the self-routing switching A self-routing exchange method characterized by transferring to the circuit (30).