JPS60102093A - Expanding system of time division network - Google Patents

Abstract

PURPOSE:To connect lots of time division switch devices without increasing a block rate of a communication channel of a common loop highway by increasing the switch multiplexity of a time division switch section and extending the sub network. CONSTITUTION:Line exchange units CSU30-0-30-3 having a time division switch device and expansion line exchange unit ECSU20 are connected in a loop by a common loop highway 10- I . Moreover, units CSU30-4-30-7 and an ECSU20 are connected in a loop by a common loop highway 10-II. The units CSU30-0-30-7 store respectively various terminals and the communication among the units CSU30-0-30-3 and the CSU30-4-30-7 uses a communication channel on the common loop highways 10- I and 10-II in the rate of one channel/one communication via the unit ECSU20 and the communication among the units CSU30-0- 30-3 or the CSU30-4-30-7 uses one loop highway.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an expansion method for an anotal exchange-like time division network.

(Prior Art) FIG. 1 is an explanatory diagram of the operation of a conventional time division network in which a plurality of time division switch devices are connected in a circular manner through a common loop highway. According to FIG. 1, communication 111 between the terminal 4 accommodated in the time division switch device 2 of the 0th town and the terminal 5 accommodated in the time division switch device 3 of the nth L1 will be explained below. .

The time slot from terminal 4 is a time division switch.

The T1-stage time switch circuit in the two-channel switch device 2 exchanges the time slot of the communication channel on the common loop highway 1, passes through the common loop highway 1, and then passes through the T1-stage time switch circuit in the time-division switch device 3. Terminal 5
Communication from the multiple terminals 4 to the terminal 5 is performed by exchanging the time slots to and transmitting the data to the terminal 5. Terminal 5
The communication operation to the terminal 4 is also similar to the communication operation from the terminal 4 to the terminal 5 described above. In addition, the time division switch device 2,
The time switch circuits in 3 are connected to the common loop highway 1 in a roof 0 manner, so that the terminals 4 and 5 can be connected to each other by one communication channel belonging to the common loop highway 1.
Communication is possible in both up and down directions.

When expanding the conventional time division network shown in Fig. 1, the number of communication channels on the common loop highway l is constant, so if the number of time division switch devices connected to the common loop highway The disadvantage is that the rate of return is high when acquiring communication channels, and the number of time-division switch devices cannot be increased beyond the number commensurate with the traffic.

(Object of the Invention) The present invention solves the above-mentioned disadvantages 1'+' and provides an expansion of a time division network that can connect a large number of time division switch devices without increasing the blocking rate of the communication channel of the common loop highway. The purpose is to provide a method.

(Structure of the Invention) The present invention adjusts the phase of its own clock to the clock from the line switching unit at the previous stage, and performs a self-clock.

a clock transmitting/receiving unit that sends the signal to the circuit switching unit at the next stage, a time slot on any communication channel upstream from the circuit switching unit at the previous stage, and a time slot of its own unit;
1 is exchanged, and the time slot after the exchange processing is sent to the next line switching unit 17 via the communication boot channel.
A plurality of pear networks formed by connecting a predetermined number of circuit switching units having a 7-division switch unit and a common loop highway in a loop shape and a common loop highway of each of the sub-networks. The basic clock generator 4'a that provides the basic clock exchanges time slots on any communication channel on the common route highway of each of the sub-networks, and the time slots after the exchange process are used as the time slots on the common roof 0 Passengers on the highway]
A time division network is configured by an extended line switching unit having a time division switch unit that sends data to a channel, and the subnetwork is expanded by increasing the switch multiplicity of the time division switch unit. This is an expansion method for a divided network.

(Example) FIG. 2 shows a connection diagram of an embodiment of the present invention.

In FIG. 2, a circuit switching unit 71 (su,
3θ-θ to 3θ-3 (abbreviated as C3U below) and 2 expansion units (hereinafter abbreviated as EC3U) 20 are connected in a roof shape. Common loop, Highway 10-■ C8U 3 o -4 ~ 3θ-2 and EC3U
Connect 2 o in a loop. C8U 3o-θ~30
-7 accommodates various terminals, and has a function of exchanging times and lots of communication channels between the terminals, and a function of exchanging times and lots of communication channels between the terminals (Lj channel time slots and common loop highway IO-1, 10-■ Any communication channel above 1.
It has the function of exchanging with the network. EC3U 20
has the function of selecting the common loop highways 10-1 and 10-fJ and interchanging any communication channel on each common loop highway.

Figure 3 shows the signal names of Common Roof Highways 10-■ and 10-I, and No. 46 Honkei, except for Figure 2.
], 8bi at a data rate of 92 Mb/s
Highway (hereafter 8 channels) accommodates 128 channels of data.
(abbreviated as MHW), one 8.192 M) Iz clock (hereinafter referred to as 8 MCLK and l11; <熢), 8 kHz.
Zori o.

(hereinafter abbreviated as 8 KCLK) and the system status display signal (A
CT) Consists of one piece.

Figure 4 shows the frame of the 13 MHW O~3 (,'f
Indicates completion. Common Loop Highway 10-■ and lθ-
■ is 8 bits! 11t PCM voice or data can be carried over up to 512 channels.

FIG. 5 shows a diagram of the embodiment of C8U 30-1 to 30-7 shown in FIG.
Common Luzino Iway 1o-1 or 1o-U shown in the figure
It has a function of receiving and regenerating the black and white signals, creating an internal clock of its own C8U and distributing it to each part, and a function of sending the black and white signals to the next stage C8U.

The control information transmitting/receiving unit 101 communicates between each C8U and each C3U on a specific communication channel on the common root highway 10-1 or to-fi shown in FIG. 2, and between each C3U and the E shown in FIG.
Receives and transmits control information for communication between C3U20. The time division switch unit) 02 has 1024 multiplexed T1 stage time switches and child circuits, and has the common loop highway x
Maximum of 512 communications from o-1 or 10-■ 51 from communication channel line control section 103 and 1.
2 communication communication channel time slot exchange is performed. C8
Control of U 1j is performed via data bus 106 using exchange programs stored in central processing unit 105. The bypass control 1 section 107 is a central processing unit.
When there is an abnormality in part 105, the common Lusino Iway 10
-■ or 10-■ Has a function to cut white C3U and tilt.

Figure 6 is not shown in Figure 2.
An h-composition diagram is shown. Common Luzo Noi Way 1O-IA, 1
0-■A is the Hummu phase matching section 200-1, 200-
It receives a clock signal and performs matching processing between the received frame phase and the frame phase within the EC3U 2o. Next, in the time allocation switch unit 202, a maximum of 512 communication channels on the common Lusino-Iway 1O-IA and a maximum of 51 communication channels on the common Lusino-Itaei 1O-fJA.
After time slot exchange with the two communication channels, the output after the exchange is sent to the common loop highway 7 (J-IB, 1 (7
- Send to DB.

The time division switch section 202 has 1024 multiple TI stage time switch circuits. Control information transmitting/receiving section 20 no■, 20
1-U is a common loop Noiway 10-1, J O
-■Each C8 shown in Figure 2 that is applied to the upper time-scheduled channel.
Communication between U and EC8U 20: Sends and receives control information. The reference clock generator 203 is connected to the common loop highway 1.
8 MCLK to O-fB and 1θ-11B as the reference clock of this time division network.

8 Supply KCLK. The EC3U 20 is controlled via the data bus 205 by an exchange program stored in the central processing unit 2θ4.

As explained above, in this embodiment, the number of C3UOs connected to one common loop highway is 4j1. [This example is limited to il and expanded to a maximum of 81 C8Us by accommodating two common loop highways in EC3U, but it is also possible to increase the switch multiplicity of the time division switch circuit in EC8U from 1024 multiplexes to 2048 multiplexes. Up to 4 common Lusino iways can be accommodated by multiplexing,
It can be expanded to a time division network of up to 16 C8U. The freezing method can also be extended to a larger time-division network.

Next, the improvement of the communication channel block of the common loop highway will be explained below with reference to FIG.

If the C3Us 30-0 to 30-7 shown in Figure 2 are connected to one common roof as in the past, data/voice communication over each C8U 1f is all connected to the common roof. )・Communication channels on iway will be used. In contrast, in the embodiment of the invention shown in FIG.
1, 1o-II and two, C3U30-θ~30-
3 and C8U 30-4 to 30-7 is EC3
Communication channels on the common loop highway 10-1 and IO-II are used via U 20 at a rate of 1 channel/1 δ, respectively, but C8U 30-Q~
Communication 1B between each C3U of 30-3 is 1 channel/1 communication on the common loop highway 1o-1, c
For communication between each C8U of su s o -4 to 30-7, it is sufficient to use the communication channel on the common Luzino IA 10-l by tracing 1 channel/1 IXj-1, so the C8U
30-o to 30-7 are connected to one common loop highway. It has the advantage that the communication channel block rate is lower than in the conventional case.

(Effects of the Invention) The present invention configures a subnetwork by connecting a plurality of circuit switching units (C3U) in a loop to a common loop highway, and connects the plurality of subnetworks to an extended circuit switching unit) (F, A time-division network is constructed by connecting them via C8U). The number of C8Us in the subnetwork is limited to within a predetermined number, and communication between C5Us in the same subnetwork uses the communication channel of its own common loop highway, and uses the communication channel of the common loop highway of other subnetworks. Because not all C8s are on the same common loop highway.
Compared to a conventional time-division network connecting U, the time-division network according to the present invention has the advantage of a lower communication channel block rate.

Further, the expansion of the sub-networks can be easily realized by increasing the switch multiplicity of the time division switch circuit in the EC8U, and large-scale time division can be achieved without increasing the communication channel block rate. Networks can be expanded in a building-based manner.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the operation of a conventional time division network;
The figure is a connection configuration diagram of the actual h1!1 example of the present invention, and Figure 3 is the connection configuration diagram of the actual h1!1 example of the present invention.
1 of the common loop highway shown in the figure. Figure 4 is a communication channel frame configuration diagram of the Dokyo 1111 Loop Highway, Figure 5 is a configuration diagram of C8U shown in Figure 2,
FIG. 6 is a configuration diagram of the EC8U shown in FIG. 2. lθ-1, 70-I+... common loop highway, 2
0-...Extended circuit switching-'=,/) (EC8U), 30
-θ~30-7...Line switching unit) (C8U), J
θθ... Clock transmitting/receiving section, 10... Control information transmitting/receiving section, 102... Time division switch section, 103...
Line flrll # section, lθ4...Tone generation section, 1
05... Central processing control unit, 106... Data bus,
102... pie" fljlJ leg, 200-
(,20θ-n... frame phase matching section, 2o1-L
, 2o1-1f... control information transmitting/receiving unit, 202...
Time division switch section, 2θ3... reference clock generation section,
204...Central processing unit section, 205...Data bus. Patent Applicant Okikeki Kogyo Co., Ltd. Figure 4 Showa Year Month Date Commissioner of the Patent Office 1. Indication of the case 1988 Patent Application No. 209171 2 Name of the invention Time division network expansion method 3 Case of the person making the amendment Relationship with Patent applicant office (105) 1-7-12 Toranomon, Minato-ku, Tokyo
No. 5, Subject of amendment Column of "Detailed Description of the Invention" in the specification and drawing "Figure 3" 6. Contents of the amendment Contents of the amendment (1) Line 7 of the 10th page of the specification Ll ［゛Connected to the highway. The phrase "since 1tYl" has been corrected to "conventional system connected by highway." (2) At the beginning of page 11, line 7 of the same book, it says, ``r csu is'', then r C8U as J and ne+Ii jt3. (3) The drawing “Figure 3” will be amended as shown in the attached sheet. The content of "mouth surface rZ 4th" is 7 + J skin.

Claims (1)

[Claims] a clock transmitting/receiving unit that matches the phase of its own clock with the clock from the circuit switching unit in the previous stage and transmits the clock signal to the circuit switching unit in the next stage; and a time division switch section that exchanges the time slot of the own unit with the time slot of the own unit, and sends the time slot after the exchange processing to the next stage circuit switching unit via the communication channel. a plurality of subnetworks and networks connected in a loop to a common loop highway; a basic clock generator that supplies a basic clock to the common loop highway of each of the subnetworks; and a common clock generator of each of the subnetworks. By an extended line switching unit having a time division switch unit that exchanges time slots on any communication channel on the loop highway and sends the time slots after the exchange processing to the communication channel on the common loop highway. 11.) A system for expanding a network, characterized in that the sub-networks are added by configuring a divided network and increasing the switch multiplicity of the time division switch unit.