JPS5930391A - Time division channel system - Google Patents

Abstract

PURPOSE:To constitute a time division channel suitable for decentralization of an exchange control function, by providing a time division switch function having a function selecting autonomously an outgoing path with channel control information. CONSTITUTION:The channel information comprises control information representing the outgoing path and communication information, the control information is shared to a control circuit CTL and the communication information is distributed to output gate circuits G1-Gm. The circuit CTL checks the control information and detects the outgoing path and checks for the presence or absence of the operating request of other switch device to the same outgoing path. As a result, when the operating request of the same outgoing path exists in >=2 switch device, the device selected with a prescribed priority rule uses the outgoing path and the device provides additionally the connection enable information. On the other hand, the other switch device provides additionally the display information of a call loss and sets the output information to the corresponding output parallel serial converting circuits P/S1-P/Sm.

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 to which in-channel control IK can be applied.

Conventionally, this type of time-division space switch, as shown in FIG. A configuration in which the input time division multiplex lines lN1-n are switched to the output multiplex lines 0UT1 to m for each channel by opening and closing the logic gate (GATE) according to the control data. It becomes. Therefore, the control of these switching operations is centrally managed by the communication path control device connected to this time-division space switch, and the call loss side 1ll (channel matching processing) of the communication path connection is also under the control of this control device. This has the disadvantage that it is difficult to decentralize the exchange control function.

The present invention was made in view of the above drawbacks of ICs, and it adds address information indicating the output route to the channel information of each channel of the input time division multiplex line of the time division space switch, and uses this information as a template. By having a function that autonomously sends information to the outgoing route and displays 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 distributed. The purpose of the present invention is to provide a time-division communication path system that enables communication.

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 to the multiplicity, holds the input channel information from the line, and n time-division switch function units that output channel information to a predetermined output time-division multiplex line according to communication path control information of input channel information, and
The m output time-division multiplex lines are respectively inputted to each unit to form an nxm time-division space switch, which has an autonomous selection switch function.

Hereinafter, the present invention will be explained based on a dormitory example shown in the drawings.

FIG. 2 is a block diagram showing an embodiment of the present invention. In the figure, the time-division communication channel system of the present invention comprises n time-division switch function units) 8Ut-8Un. P and control circuit CTL
, output gate circuits 01 to Gm, and parallel/serial conversion circuits P/St to P/Sm.

Each time division switch function unit) S Us ~ S Un is
Input time division multiplex lines INl to INn of multiplicity k (an integer greater than or equal to kii'1) are connected correspondingly, and each unit)
S Ul to S un operate for each channel.

The serial-to-parallel conversion circuit S/P each holds input channel information from the corresponding multiplex lines INl 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 01 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 another switch unit for the same output route. As a result, if two or more 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 provide connection availability information. On the other hand, the other switch units add call loss display information and set output channel information to the corresponding output parallel-serial conversion circuits P/Ss to P/Sm.

Above parallel-serial conversion circuit P/S 1- P/Sm
are multi-connected to the corresponding output time division multiplex lines 0UTl to OUTm for each time division switch function unit) SUt to SUn, and the above output channel information is set.

The time division multiplex line system of the present invention is generally used with n=am as shown in FIG.
~0UTn are <INx, 0UTt) ~<INn, respectively
, 0UTn>, which are connected to a plurality of switching devices 5WEQs to 5WEQn. These switching devices 5WEQx to 5WEQn can independently access the time division space switch 5SWK.

FIG. 4 shows an example of the structure of the channel information described above. In what is shown in the figure, Kk pieces of channel information are multiplexed within a frame. The channel information consists of a control data field CTLF and a communication information field DATA. The control data field CTLF is an operation mode designation MOD.
and an outgoing route designation address 0UTDT. The operation mode designation MOD consists of information such as input channel availability, bus connection request, priority data, etc. On the other hand, in the case of output channels, it consists of bus connection availability information, call loss information, etc. - For example, once a path connection is enabled based on the priority of an input channel, 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 path control information and communication information, and has a function of autonomously selecting an outgoing route using the call path 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, FIG. 3 is a block diagram showing a general connection example of the time-division channel system of the present invention with switching equipment, and FIG. FIG. 2 is an explanatory diagram showing an example of the structure of channel information. SU+-8un...Time division unit switch function unit S/
PI~8/P n...Serial parallel conversion circuit CT
L...System #Circuit 01~Gm...Output gate circuit P/5t-P/Sm...Parallel-serial conversion circuit Applicant: NEC Corporation Figure 1 Figure 2

Claims (1)

[Claims] The channel information of each channel is composed of communication path control information and communication information, and a time division multiplex line is input to the multiplicity, and input channel information from the line is held. n time-division switch function units that output channel information to predetermined output time-division multiplex lines according to call path control information of input channel information are provided, and each unit is provided with m output time-division multiplex lines. A time-division communication path system characterized in that an NXM time-division space switch is constructed by inputting each of the following, and is provided with an autonomous selection switch function.