JPS6350917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time-division channel, and more particularly to a time-division channel system comprising a time-division space switch that can be applied to channel control.

Conventionally, this type of time-division space switch, as shown in FIG. 1, includes a logic gate GATE, a channel control device SWC that controls the logic gate GATE,
It has a memory CTLM that holds control data from the control device SWC, and opens and closes the logic gate GATE according to the control data.
Input time division multiplexed line IN _1~o Output multiplexed line
The configuration is such that switching is performed for each channel from OUT ₁ to n. Therefore, the control of these switching operations is centrally managed by the communication path control device connected to this time-division space switch, and call loss control (channel matching processing) for communication path connections is also under the control of this control device. However, there was a drawback that it was difficult to decentralize the exchange control function.

The present invention has been made in view of such drawbacks, and it adds address information indicating the output route to the channel information of each channel of the input time division multiplex circuit of the time division space switch, and based on this information, By having the function to autonomously send information to the outgoing route and to display a message to that effect on the input channel when a call loss occurs, the above drawbacks can be solved and the switching control function can be decentralized. The purpose of this invention is to provide a time-division communication path system that makes it possible.

That is, the present invention configures the channel information of each channel to consist of call path control information and communication information,
Inputs a time division multiplex line with multiplicity k (k is an integer greater than or equal to 1), holds input channel information from the line, and routes it to a predetermined output time division multiplex line based on call path control information of the input channel information. n time-division switch function units that output channel information are provided, and each of the n time-division switch function units receives a corresponding input of the time-division multiplexed circuit with the multiplicity k, and outputs m pieces of time-division multiplexed circuits. It outputs multiple lines to form an n×m time-division space switch and has an autonomous selection switch function.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention. In the figure, the time-division channel system of the present invention has n
The time division switch function unit SU ₁ to SUn is equipped with a time division switch function unit _SU1 to
SUn includes a serial-parallel conversion circuit S/P,
It is configured to include a control circuit CTL, output gate circuits G ₁ to Gm, and parallel-to-serial conversion circuits P/S ₁ to P/Sm.

Each time division switch function unit SU ₁ to SUn is
Input time division multiplex lines IN ₁ to INn with multiplicity k (k is an integer of 1 or more) are connected correspondingly, and each unit
SU ₁ to SUn operate on a channel-by-channel basis.

The serial-to-parallel conversion circuit S/P each holds input channel information from the corresponding multiplex lines IN ₁ to INn. This channel information consists of control information indicating the outgoing route and communication information. The former is distributed to the control circuit CTL, and the latter is distributed to output gate circuits G ₁ to Gm serving as output routes.

The control circuit CTL examines the control information, detects which output route, and also checks via the control bus BUS whether there is a request to use the same output route from another switch unit. As a result, 2
If the above switch units request the use of the same output route, one of them will be selected according to a predetermined priority rule, and that switch unit will use that output route and add connection availability information. On the other hand, the other switch units add the call loss display information and convert the corresponding output parallel-serial converter circuit P/S ₁ to
Set output channel information to P/Sm.

The above parallel-serial conversion circuit P/S ₁ ~P/
Sm is each time division switch function unit SU ₁ ~
Output time division multiplex line OUT ₁ corresponding to each SUn
Multi-connected to OUTm, and the above output channel information is set.

The time-division channel system of the present invention is generally used with n=m as shown in FIG.
The input time division multiplex lines IN ₁ ~ INn and the output time division multiplex lines OUT ₁ ~ OUTn are <IN ₁ , OUT ₁ > ~, respectively.
They are used as a pair of <INn, OUTn> and are connected to a plurality of switching devices SWEQ ₁ to SWEQn. These switching devices SWEQ ₁ to SWEQn can independently connect and access the time division space switch SSW.

FIG. 4 shows an example of the structure of the channel information described above. In what is shown in the figure, k pieces of channel information are multiplexed within a frame. Channel information is
It consists of a control data field CTLF and a communication information field DATA. control data field
CTLF consists of an operation mode designation MOD and an output route designation address OUTDT. In the case of an input channel, the operation mode designation MOD consists of information such as a bus connection request and priority data, while in the case of an output channel, it consists of path connectability information, call loss information, and the like. For example, once the priority of an input channel allows path connection, if data with the highest priority is added and transmitted, that channel can be used continuously during a call.

As explained above, the present invention has a time division switch function in which channel information is composed of call route control information and communication information, and has a function of autonomously selecting an outgoing route using the call route control information. The provision of the unit has the effect of configuring a time-division communication path suitable for decentralizing switching control functions.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional time-division space switch, FIG. 2 is a block diagram showing an embodiment of the time-division channel system of the present invention, and FIG. 3 is a block diagram showing a switching device of the time-division channel system of the present invention. FIG. 4 is an explanatory diagram showing an example of the structure of channel information. SU ₁ ~SUn……Time division switch function unit,
S/P ₁ ~ S/Pn...Serial parallel conversion circuit,
CTL...Control circuit, _G1 ~Gm...Output gate circuit, P/ _S1 ~P/Sm...Parallel-serial conversion circuit.

Claims (1)

[Scope of Claims] 1 Channel information of each channel is composed of communication path control information and communication information, and an input time division multiplexing circuit with multiplicity k (k is an integer of 1 or more) is input, and the channel information of each channel is n time-division switch functional units are provided that hold input channel information from the input channel information and output the channel information to a predetermined output time-division multiplex line based on call path control information of the input channel information, and the n time-division switches The input time division multiplex lines of the above multiplicity k are connected to each of the functional units in a one-to-one correspondence, and the m output time division multiplex lines are connected to each of the above n time division switch function units. A time-division communication channel system characterized in that an n×m time-division space switch is constructed by connecting the switches, and an autonomous selection switch function is provided.