JPS6350916B2 - - 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, as shown in FIG. 1, this type of time-division space switch has a logic gate GATE and a memory CTLM that holds control data from a channel control device SWC that controls the logic gate GATE. Logic gate GATE by its control data
By opening and closing the input time division multiplex line,
The configuration is such that IN _{1 to o} are switched to output multiplex lines OUT _{1 to n} for each channel. Therefore,
Control of these switching operations is centrally managed by a communication path control device connected to this time division switch.
Also, call loss control (channel matching processing) for communication path connections.
It also had the disadvantage that it was under the control of this control device, making it difficult to decentralize the exchange control function.

The present invention has been made in view of such drawbacks, and has a configuration that includes control information for controlling the output path as channel information of each channel of the input time division multiplex line of the time division space switch, and based on this information. It is an object of the present invention to provide a time-division communication path system that solves the above-mentioned drawbacks and enables decentralization of switching control functions by autonomously switching to an outgoing path.

That is, the present invention configures the channel information of each channel to consist of call path control information and communication information,
When n time-division multiplexed lines with multiplicity k are input, information on each n input channel is held, and channel information to be output is selected based on call path control information of the input channel information. A division switch functional unit is provided, and m time division switch function units are provided, and each unit is inputted with the above n time division multiplex lines to form an n×m time division space switch. It consists of

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 communication path system of the present invention is m
The time-division switch function unit SU ₁ to SUm is comprised of three time-division switch function units SU ₁ to SUm.
~SUm has a serial-parallel conversion circuit S/P ₁
~S/Pn, control circuit CTL, and output gate circuit
It is configured to include G ₁ to Gn and a parallel/serial conversion circuit P/S.

The time division switch function units SU ₁ to SUm are
Input time division multiplex lines IN ₁ -INn with multiplicity k are multi-connected to serial-parallel conversion circuits S/P ₁ -S/Pn, and each unit SU ₁ -SUm operates for each channel.

The above serial-parallel conversion circuit S/P ₁ ~S/
Pn holds input channel information from the 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 the output gate circuits G ₁ to Gn.

The control circuit CTL examines the control information,
In addition to checking which outgoing route it is, it is also checked to see if there are multiple requests to use the same outgoing route. As a result, when multiple requests are received, one is selected according to a predetermined priority rule, and connectability information is sent to that input channel, while information to other input channels is sent. For each, connectability information is added and notified as output channel information to the corresponding switch function units SU ₁ to SUm via the control bus BUS.

The parallel-to-serial conversion circuits P/S ₁ to P/Sm of the units SU ₁ to SUm are connected to the corresponding output time division multiplex lines OUT ₁ to OUTm, and the selected output channel information is set. , the outputs of the corresponding lines OUT ₁ to OUTm.

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, OUT ₁ > ~ <, respectively.
INn, OUTn> are used as a pair, and these are connected to a plurality of switching devices SWEQ ₁ to SWEQn.
These switching devices SWEQ ₁ to SWEQn 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. action mode
In the case of an input channel, the MOD consists of information such as a bus connection request and priority data, while in the case of an output channel, it consists of information such as path connection availability information and call loss information. 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 throughout the path.

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 drawings]

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 ~ SUm……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)

[Claims] 1. The channel information of each channel is composed of communication path control information and communication information, and when n input time division multiplex lines with multiplicity k (k is an integer of 1 or more) are input, , n from the line
A time division switch function unit that holds information on each input channel of the book and selects a channel to which communication information is to be output based on communication path control information of the input channel information is provided, and m pieces of the time division switch function units are provided. At the same time, the n input time division multiplex lines are multi-connected across the m time division switch functional units, and the m output time division multiplex lines are connected to the m time division multiplex function units.
By connecting each of the time division switch functional units in a one-to-one correspondence, an n×m time division space switch is configured, and any input channel of n inputs is connected to m output time division multiplex lines. A time-division channel system characterized by outputting .