JPS5829679B2 - Time division channel control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a channel matching method in a time division communication path of an electronic exchange.

Here, the "channel matching method" refers to a method in which, when the input/output terminals of the call switch network are determined, one free route is selected from among the connection cables connecting the two.

Conventionally, in a storage program type electronic exchange, channel matching of communication paths is performed by software using a channel map stored in a storage device.

Particularly when the communication channel configuration is a space division type, channel matching is almost always performed by software.

Furthermore, even when the communication channel configuration is of the time-division type, channel matching is generally performed by software.

For this reason, the amount of processing required for channel matching in the exchange program increases, the central control unit increases and the burden of software creation increases, resulting in a disadvantage that economic efficiency is impaired.

A time division communication channel is generally constructed by a combination of a time switch M constituted by a memory and a space switch G constituted by a gate. In the specification r
It is called the M-G-M type.

This invention relates to an electronic exchange channel switch configured as shown in FIG.

The present invention constantly inserts channel map information indicating the blockage of the communication channel on the forwarding jumper highway into a specific time slot on the forwarding jumper highway in an M-G-M type time division communication path. On the Janfuta Highway side, the receiving side controls the gate section of the time-sharing communication path to guide the channel map information of the desired sending Shanfuta Highway to a specific time slot on the own highway, and the extracted results and the receiving Transmission/reception is characterized by performing channel matching between jumpers by performing a logical product with the channel map of the jumper highway.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a time division communication path to which the present invention is applied.

That is, it is a so-called M-G-M type time division communication path in which a space switch G is sandwiched between two sets of phase conversion switches M.

Channel map information indicating whether each time slot on this highway is vacant or occupied is controlled to be constantly inserted into a specific time slot of the forward jumper highway SJH.

FIG. 2 shows a side view of the frame structure.

■When a frame consists of 32 time slots, 1
By inserting information indicating whether a communication channel is idle or blocked every six time slots, the idle status of all communication channels can be displayed in two frames.

That is, in FIG. 2, one frame is composed of time slots /161 to 32, and time slots A61 to 15 and 17 to
31 is used for the speech channel and /1616 and /16.32 are used for channel map information.

Each time slot consists of 8 bits; in Figure 2, //6
16 are expanded and shown, B1 to B8 are used to display air block information for communication channels 1 to 8 or 9 to 16, and at the same time //f; It is used to display air blockage information on numbers 17-24 or 25-32.

That is, when the call time slot /161 is "empty", the time slot A616 or the time slot 4i of /V;
Insert "1" into any one of the bits (■ bit), and when it is "closed", insert Iol on the feed jumper highway side.

Figure 3 shows a partial configuration diagram of the hardware on the feeder jumper highway side.

In Figure 3, MSW is a memory switch, HDM is a switch information holding memory, TIM is a timing control circuit, SR is a shift register, SEL is a selector, 5JH (#1) is the first sending jumper highway, 5JH (#n :
is the nth sending Janfuta Highway.

Block M is a first phase conversion switch.

The switch information is stored in the switch information holding memory HDM, and the data read from this holding memory becomes an address for the memory switch MSW, and the contents of the memory switch MSW indicated by the address are
Send via selector SEL to Janfuta Highway S
Sent to JH.

Phase conversion is performed in this way.

The switch information holding memory HDM stores switch information as well as time slot vacancy information ("1" if empty, "0" if full), and this information is stored at the same time as the address information for the memory switch MSW is read. , are held in shift register SR.

When the time corresponding to the time slot A16 or 716.32 comes, the timing control circuit TIM controls the selector SEL to send the vacancy information held in the shift register SR to the jumper highway SJH.

As a result, air blockage information is displayed in time slot 416 or /1632.

The reception is the fourth regarding the configuration of RJH on the Janhuta Highway side.
More details are shown in the figure.

In FIG. 4, DEC is a decoder, MEM is a space switch control memory, CTR1 and CTR2 are counters, G1-G3 are gate circuits, and RES is a register.

In the circuit configured as shown in FIG. 4, the channel map information is guided from the signal appearing on the jumper highway RJH to the register under the control of the counter CTRI and the space switch control memory MEM.

The blockage information of the communication channel of the Janfta Highway RJH is written in advance in the space switch control memory MEM.

The reception stored in this space switch control memo IJMEM is the channel map of the jumper highway and the feeder jumper highway SJ guided by the register RES.
The H channel map is synchronously read out from the space switch control memory and ANDed with it.

As a result, when there is an empty indication in any of the time slots during the jumper highway for transmission and reception, a signal "1" is sent to the output of the gate circuit G3, and a channel match is detected.

Furthermore, the counter 0TR2 indicates the time slot number for which the AND is taken, and the space switch control memo IJMEM
will be updated in sync with.

When a channel match is detected, a stop pulse is sent to the counter CTR2 and updating of the counter 0TR2 is stopped, so the time slot number where the channel match occurred can be identified by reading the value of the counter 0TR2.

As explained above, in the present invention, in an M-G-M type time-division communication path, the channel map of the sending junction highway and the receiving channel map are determined by hardware by taking the AND of the channel map of the jumping highway. This has the effect of reducing the amount of software processing in electronic exchanges and making central park opening equipment and software production more economical.

[Brief explanation of drawings]

FIG. 1 is an inverted configuration showing a reception circuit communication path to which the present invention is applied. FIG. 2 is a diagram showing how to use time slots according to the embodiment of the present invention. FIG. 3 is a partial configuration diagram of the hardware on the feed jumper highway side according to the embodiment of the present invention. FIG. 4 is a partial configuration diagram of the hardware on the Junfta Highway side where the present invention is implemented. "M... Phase conversion switch, SJH...
・Forward Janfuta Highway, RJH...Receive Janfuta Highway, G...Space switch, C
TR...Counter, RES...Register, MEM...Space switch control memory, MS
W...Memory switch, HDM...Switch information holding memory, TIM...Timing control circuit, SR...Shift register, SEL...
·····selector.

Claims (1)

[Claims] In the 1M-G-M type time-division call path control system, a channel map indicating the blockage of the communication channel on the sending jumper highway is inserted into a specific time slot on the sending jumper highway, and the receiver is connected to the jumper highway. On the highway side, the channel map information of the desired sending junctor/'% Iway is guided to a specific time slot on the own highway via the gate part of the time-sharing communication route, and this channel map information and the self-receiving are transferred to the channel map of the jumper highway. A time-division channel control method characterized by performing channel matching by performing logical product with