JPH03280754A - Packet terminal equipment - Google Patents

Abstract

PURPOSE:To form a high speed packet transmission network with much flow of packet information by comparing transmission quantity of a packet with a prescribed value inputted to a comparator circuit and sending the packet when the quantity of the packet is discriminated to be less than the prescribed value. CONSTITUTION:A packet signal is inputted from an input terminal 1 based on a packet transmission request and stored in a storage circuit 8. An output of the circuit 8 is inputted to a pulse generating circuit 5, from which a pre scribed pulse is outputted for each input of the packet in a predetermined unit to a digital filter 6, where the pulse is smoothed. A comparator 7 compares the smoothed output with a prescribed value set to the terminal 4 and when the smoothed output is a prescribed value or less, it is discriminated to be in the transmission enable state and the packet stored in the circuit 8 is outputted to an output terminal 3 via a transmission circuit 2. Thus, the packet information with much flow is sent at a fast speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packet terminal device, and particularly to a packet terminal device capable of regulating the flow rate of packet information.

[Conventional technology]

Conventionally, the flow rate of packet information has been controlled by means of accepting a transmitted packet on the receiving side and determining whether or not to transmit the next packet based on a response indicating whether or not the next packet can be transmitted.

[Problem to be solved by the invention]

The conventional packet terminal device described above controls the flow rate based on the response from the receiving side to the transmitted packets, so the increase in processing amount at the transmitting device can be accommodated by high-speed transmission. There was a drawback that made it impossible.

[Means to solve the problem]

The packet terminal device of the present invention is a packet terminal device in which the amount of information to be transmitted is predetermined, and includes a storage circuit that temporarily stores packet information requested for transmission, and a transmission circuit that sends out the stored packet information to a transmission path. , a pulse generation circuit that emits a pulse every time a packet of a predetermined gait is transmitted, a digital filter connected to this pulse generation circuit, and the output value of this digital filter). A comparison circuit compares the predetermined value with a predetermined value, and if the result of the comparison circuit determines that the packet is less than or equal to a predetermined value, the packet stored in the storage circuit is transmitted.

〔Example〕

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

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, a bucket signal is input from an input terminal 1 based on a packet transmission request. The input packet is stored in the storage circuit 8. If the transmitting circuit 2 accepts the packet as described later and is in a transmittable state, the packet can be transmitted N2
It is output to output terminal 3 via. Note that the output terminal 3 is connected to a bucket relay device, a packet switch, etc., and outputs a bucket signal. On the other hand, the output from the memory circuit 8 is branched and also input to the pulse generation port H54:. In the pulse generating circuit 5, a constant pulse is output every time the bucket I is inputted and is inputted to the digital filter 6. In the digital filter 6, for example, as shown in FIG.
It is composed of a first-order filter and has the effect of smoothing the input. Comparison circuit 7'τ'' compares the smoothed output with a constant value set at terminal 4! 1. If the smoothed output is above a certain value, more traffic than the predetermined amount will be input.
Judgment! 2. It is determined that the state is not transmittable, otherwise it is determined that the state is capable of transmitting.

This comparison output is input to the storage circuit 8. In the storage circuit 8, when it is determined that the transmission is possible, the back cut is outputted to the output terminal 3 via the transmission circuit 2.

〔Effect of the invention〕

As described above, the present invention performs simple flow rate control by comparing and measuring the amount of packet transmission with a constant value input to a comparison circuit. 17) ・High-speed packets with a large flow of information ・It is effective in constructing a transmission network.

is a circuit diagram of a digital filter used in this embodiment.

DESCRIPTION OF SYMBOLS 1... Input terminal, 2... Transmission circuit, 3... Output terminal, 4... Terminal, 5... Pulse generation circuit, 6...
Digital filter, 7... Comparison circuit, 8... Memory circuit.

Claims (1)

[Claims] In a packet terminal device in which the amount of information to be transmitted is predetermined, there is a storage circuit that temporarily stores packet information that has been requested to be transmitted, a transmission circuit that sends out this stored packet information to a transmission path, and A pulse generation circuit that generates a pulse every time a packet is transmitted, a digital filter connected to this pulse generation circuit, a comparison circuit that compares the output value of this digital filter with a predetermined constant value, and this comparison circuit. 1. A packet terminal device that transmits a packet stored in a storage circuit when the result of the circuit is determined to be less than a predetermined value.