JPH0666755B2 - Time slot allocation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a time slot allocation system, and more particularly, to a time slot for each channel when time-division multiplexing a data group having various kinds of speeds input from a plurality of channels. The present invention relates to a time slot allocation method for allocating slots.

[Prior art] A conventional time slot allocation method of this type is to allocate channel numbers and allocation times from the keyboard of the operation panel while making telephone calls between stations during communication route setting or communication suspension at the initial stage of line construction. A method of inputting a slot number is used. In this conventional method, if each station arbitrarily assigns a time slot, it will be reassigned to an already assigned time slot to cancel the previous assignment, or it will be troublesome to search for an unassigned empty time slot. It causes difficulties such as taking too much. Usually, in order to avoid such a difficulty, a center station is determined in advance, the center station manages a list showing the time slot allocation status, and the time slot allocation at each station is performed according to an instruction from the center station.

[Problems to be solved by the invention]

The above-mentioned conventional time slot method relies too much on human power, so when allocation management becomes complicated or re-allocation frequency increases due to an increase in the number of stations, an increase in the number of channels, diversification of data rate, etc., Not only is the man-hour required for allocation management excessively increased, but it is impossible to reallocate at a desired frequency, and the efficiency of communication volume is reduced.

An object of the present invention is to solve the above-mentioned problems and to provide a time slot allocation method capable of executing allocation promptly without requiring an excessive management man-hour as in the past.

[Means for solving problems]

The method of the present invention is a time slot allocation method for allocating the time slots to each of the channels in order to transmit and receive input data of a plurality of channels by time division multiplexing for each frame consisting of a predetermined number of time slots, and A first allocating means for allocating the time slot for transmitting the channel in response to the first control data indicating the required number of the time slots and transmitting second control data indicating the allocation result; Second allocating means for allocating the time slot for the receiving channel in response to the second control data coming from the device, wherein the first side of the calling side when calling one of the channels. Second allocation obtained by giving the first control data to the allocation means of
Control data for the called side is transmitted to the called side together with the first control data for the called side, and the called side gives the received second control data to the second assigning means of the called side and receives the same. The first control data that has been transmitted to the first side of the called side.
The second control data obtained by being given to the allocating means is transmitted to the calling side, and the second control data received by the calling side is given to the second allocating means of the calling side. hand,
Allocating the time slots for transmission and reception for both the calling and called parties.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a sequence diagram for explaining its operation.

In FIG. 1, each transmission data of the first channel (CH-1) to the Nth channel (CH-N) is sent to the transmission circuit 1. Each transmission circuit 1 has a function of temporarily storing the transmission data and sequentially reading out and transmitting the temporarily stored transmission data according to a signal instructing the transmission timing transmitted from the transmission time slot allocation circuit 5. Have. The control channel is channel CH-1.
To CH-N include a data indicating the channel number of the channel and the number of required time slots per frame at the time of making a call requesting a communication request from the channel, and request the transmission time slot allocation of the channel. Request data (A), and request data (B) requesting transmission time slot allocation on the called side, including data indicating the channel number of the called side as the communication partner and the number of required time slots per frame. Is provided in a predetermined format. The transmission control circuit 3 that has received this control data transmits the transmission time slot allocation circuit 5
In the time slot memory or the transmission timing signal transmitted from the transmission time slot allocation circuit 5 to each transmission circuit 1 detects an empty time slot, and requests the location of the empty time slot in the time slot memory (A ), And the channel number of the request data (A) is written and the transmission time slot allocation is set. The transmission TS (time slot) setting (A) in FIG. 2 shows this time slot setting. The transmission control circuit 3 uses this transmission TS
After assembling the data showing the result of the setting (A), that is, the data showing the channel number in the request data (A) and the time slot number assigned to the channel, and the request data (B) into a predetermined format, Send to the transmission circuit 1. (Note that the transmission and reception time slots of the control channel are preset in the transmission and reception time slot allocation circuits 5 and 6, respectively.) The transmission time slot allocation circuit 5 stores, for example, the contents of the time slot memory in the time slot. By reading and decoding in the order of numbers, transmission timing signals for each channel are generated and transmitted. The signal sent from the transmission circuit 1 of each channel is time-division multiplexed into a frame format of a predetermined format by the multiplexing circuit 2 and transmitted to the partner device.

The partner device, that is, the called-side device also has the configuration shown in FIG. 1, and the time-division multiplexed signal sent from the calling-side device is decomposed into frames by the demultiplexing circuit 7 and the receiving circuit of each channel is Send to 8. Each reception circuit 8 obtains the reception data of each channel by reading the data of the time slot designated by the reception timing signal given from the reception time slot allocation circuit 6. Control data received by the receiving circuit 8 of the control channel, that is, TS setting (A) in FIG.
The data indicating the result + TS setting (B) request is sent to the reception control circuit 4. The reception control circuit 4 receives the time slot number data of the TS setting (A) result and the reception channel number data of the TS setting (B) request as the reception time slot allocation circuit 6
To set the time slot allocation for the receive channel. (Reception TS setting (A) in FIG. 2) Upon completion of this setting, the reception control circuit 4 receives the response (A) data indicating that the data sent from the calling side device can be received. At the same time, the data of the TS setting (B) request is transferred to the transmission control circuit 3 of its own device (callee device). Transmission control circuit 3
Sends the TS setting (B) request data to the transmission time slot allocation circuit 5 to set the time slot allocation of the transmission channel in the same manner as in the case of the calling side (transmission TS setting ( B)). After that, the transmission control circuit 3 sends the data indicating the result of the transmission TS setting (B) together with the data of the response (A) to the transmission circuit 1 to be transmitted to the calling side device.

The calling side device that receives this sets the time slot allocation of the receiving channel as in the case of the called side (second
Receive TS setting (B) in the figure) and response (B) indicating that reception is possible
The data of is returned to the called device. Upon receiving the response (B), the callee device sets the channel requested by the caller to communicate and sends communication start data to the caller device. In response to this, the calling side device shifts to communication with the called side device of the channel for which the communication is requested.

In the above description, the case where there is no shortage of empty time slots and positive responses (A) and (B) are transmitted at the time of setting each time slot allocation has been shown. If it becomes impossible to set, a negative response will be sent.

In this embodiment, since the time slot allocation is automatically set, the allocation can be set quickly without the need for the conventional management at the center station. In addition, since the time slot allocation is set separately for each of the two communication directions, the probability of being unassignable is small because the time slots of the setting destinations are not empty, as compared to the case of collectively setting the time slots for both directions. it can.

〔The invention's effect〕

As described above, the present invention has an effect of realizing a time slot allocation method capable of executing allocation quickly without requiring an excessive management man-hour as in the related art.

[Brief description of drawings]

1 and 2 are a block diagram showing an embodiment of the present invention and a sequence diagram for explaining the operation thereof, respectively. 1 ... Transmission circuit, 2 ... Multiplexing circuit, 3 ... Transmission control circuit, 4 ... Reception control circuit, 5 ... Transmission time slot allocation circuit, 6 ... Reception time slot allocation circuit, 7 ... Separation circuit , 8 ... Receiving circuit.

Claims (1)

[Claims] 1. A time slot allocation system in which the time slots are allocated to each of the channels in order to transmit and receive input data of a plurality of channels by time division multiplexing for each frame consisting of a predetermined number of time slots. First allocating means for allocating the time slot for transmitting the channel in response to the first control data indicating the required number of the time slots and transmitting second control data indicating the allocation result, Second allocating means for allocating the time slot for the receiving channel in response to the second control data coming from the partner device, and when the one of the channels is called, the calling side of the calling side And transmitting the second control data obtained by giving the first control data to the first allocating means together with the first control data for the called side to the called side. , The called side gives the received second control data to the called side's second assigning means, and gives the received first control data to the called side's first assigning means The second control data obtained is transmitted to the calling side, and the calling side gives the received second control data to the second allocating means of the calling side to make the calling. And a time slot allocation system for allocating the time slots for transmission and reception on both the called side and the called side.