JP2591238B2 - Loop network connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a network connection device of a loop network system.

〔Overview〕

The present invention provides a loop network connection device in which, when two loop networks are connected line by line, by connecting the connection lines together via a FIFO so that the connection portion does not increase even if the number of connected lines increases. It was done.

[Conventional technology]

FIG. 3 is a block diagram of a conventional loop network connection device.

Conventionally, in the loop network connection device, the loop network 10 is configured such that one frame is composed of m (m is a positive integer) time slots (octets), and one multiframe is composed of k (k is a positive integer) frames. Used a frame for time division multiplexing.

In the loop network 20, one frame is composed of n (n
Is a positive integer) time slots (octets), and one multi-frame uses k (k is a positive integer) frames for time division multiplexing.

In addition, Loop Network 10 and Loop Network
In the case of connecting 20 to each line, transmission / reception signals of the line to be connected are separated from each loop network, and each line is individually connected.

[Problems to be solved by the invention]

However, in such a conventional loop network connection device, the loop network 10 and the loop network
When connecting 20 to each line, the transmission / reception signals of the connected lines were separated from each loop network and connected individually for each line.As the number of connected lines increased, the connection area increased. However, there is a disadvantage that it is difficult to realize.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and an object of the present invention is to provide a loop network connection device in which a connection portion does not increase even if the number of connected lines increases.

[Means for solving the problem]

The present invention includes two loop networks in each of which a plurality of nodes using a time-division octet multiplex frame are connected in a loop, and a pair of connecting means for connecting the two loop networks. ,
In the loop network connection device including a branch unit that branches one of the two loop networks of the received signal in line units, and an insertion unit that inserts the output of the branch unit into the other loop network, each of the connection means, A synchronization detection unit that detects a frame pulse and a multi-frame pulse from the reception signal of the one loop network and supplies the frame pulse and the multi-frame pulse to the own branch unit and the insertion unit of the other connection unit; and a timing based on the reception signal and the multi-frame pulse of the one loop network. A pulse generating means for generating a signal, and a FIFO for temporarily storing an output of the own branch unit based on the frame pulse and the timing signal and outputting the content to the self-inserting unit based on the frame pulse and the timing signal from the other connecting means. Features.

Also, one time division octet multiplex frame of one of the above two loop networks has one frame composed of positive integer m time slots, one multiframe composed of positive integer k frames, and the other time division octet multiplex frame. , One frame is composed of n positive integer frames, and one multiframe is composed of k positive integer frames.
In the time-division octet multiplexed frame of the input / output data of the FIFO, one frame is composed of p integer time slots and one multiframe is composed of k integer integer frames.

[Action]

In each connection unit, the synchronization detection unit detects a frame pulse and a multi-frame pulse from the received signal of one loop network and applies the same to the own branch unit and the insertion unit of the other connection unit. A timing signal is generated based on the signal and the multi-frame pulse, and the FIFO temporarily stores the output of the own branching unit based on the frame pulse and the timing signal, and outputs the content to the self-inserting unit based on the frame pulse and the timing signal from another connection unit.

One loop network uses a time-division octet multiplexed frame in which one frame is composed of positive integer m time slots and one multiframe is composed of positive integer k frames, and the other loop network is one frame. Is a time-division octet multiplexed frame composed of n time slots of a positive integer and one multiframe is composed of k frames of a positive integer, and one frame is composed of p time slots of a positive integer in a FIFO. It inputs and outputs data of a time division octet multiplexed frame in which one multiframe is composed of k positive integer frames. Therefore, the connected lines can be connected collectively. As described above, even if the number of lines to be connected increases, the size of the connection portion can be kept from being known.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a loop network connection device according to an embodiment of the present invention. In FIG. 1, a loop network connecting device includes two loop networks 10, 20 in which a plurality of nodes 11 to 13 and 21 to 23 using a time-division octet multiplex frame are connected in a loop, respectively. A pair of connecting means 30 ₁ , 30 ₂ for connecting 20
And each connection means 30 ₁ , 30 ₂ is a loop network
Branch unit 31 for branching one of the received signals 10 and 20 in line units
_1, it includes a 31 _2, and an insertion portion 35 _1, 35 ₂ for inserting the output of the branching unit 31 _1, 31 ₂ in the other loop network 20, 20.

Here, the feature of the present invention is that each connecting means 3
0 ₁ and 30 ₂ detect the frame pulses f ₁ and f ₂ and the multi-frame pulses mf ₁ and mf ₂ from the received signals of one of the loop networks 10 and 20 to detect the branch pulses 31 ₁ and 31 ₂ and the connection means 30
Synchronization detectors 32 ₁ , 32 given to insertion sections 35 ₂ , 35 ₁ of ₂ , 30 _1
2 , pulse generators 33 ₁ and 33 ₂ that generate timing signals based on the received signals of one of the loop networks 10 and 20 and the multi-frame pulses mf ₁ and mf ₂ , and frame pulses
f _1, f ₂ and the branch portions 31 ₁ on the basis of a timing signal, 31 a frame pulse f ₁ of ₂ of the output from the temporarily stored connecting means 30 _2, 30 _1, f ₂ and the insertion portion 35 ₁ based on the timing signal, 35 _Two
Lies in comprising a FIFO 34 _1, 34 ₂ to output the contents.

In addition, one time-division octet multiplex frame of one of the two loop networks 10 and 20 is configured such that one frame is composed of m integer timeslots and one multiframe is a positive integer k
The other time-division octet multiplex frame is composed of n frames of positive integer, one frame is composed of k frames of positive integer, and input / output data of FIFOs 34 ₁ and 34 ₂ In the time-division octet multiplexed frame, one frame is composed of p time slots of positive integer and one multiframe is composed of k frames of positive integer.

The operation of the loop network connection device having such a configuration will be described. FIG. 2 shows a frame format of a time division multiplex frame of the loop network connection device of the present invention.

As shown in FIGS. 2 (a) and 2 (b), the loop network 10 is used for time division multiplexing where one frame is composed of m time slots (octets) and one multiframe is composed of k frames. Use frames.

As shown in FIGS. 2 (d) and 2 (e), the loop network 20 is used for time division multiplexing where one frame is composed of n time slots (octets) and one multiframe is composed of k frames. Use frames.

The connecting means 30 _1, 30 _2, the received signal of the loop network 10, branch unit 31 _1, the synchronization detecting unit 32 ₁ and the pulse generator
33 Connected to ₁ .

Synchronization detector 32 ₁ detects a frame and multi-frame from the received signal, the branch portion 31 of the frame pulse f _1
1 , output to the insertion section 35 ₂ , FIFO 34 ₁ and FIFO 34 ₂
The multi-frame pulse mf ₁ is supplied to the branching unit 31 ₁ and the inserting unit 35 ₂
And outputs to the pulse generator 33 _1.

Pulse generating unit 33 ₁ generates various timing from the received signal and the multi-frame pulse mf _1, output as a write signal to FIFO 34 _1, also outputs a read signal to the FIFO 34 _2, the branch portion 31 ₁ of the drop signal was a FIFO 34 ₁ data input, the FIFO 34 _2, connects the data output to the insertion portion 35 _2.

Moreover, the connecting means 30 _2, the received signal of the loop network 20 branching unit 31 _2, the synchronization detecting unit 32 ₂ and the pulse generator
33 Connected to ₂ .

Sync detector ₃₂₂ detects a frame and multi-frame from the received signal, the branch portion 31 of the frame pulse f _2
2, the insertion portion 35 _2, and output FIFO 34 _1, 34 _2, also outputs a multi-frame pulse mf ₂ bifurcation 31 _2, the insertion portion ₁ and the pulse generator 33 _2.

Pulse generator 33 ₂ generates various timing from the received signal and the multi-frame pulse mf _2, and outputs as a write signal to the FIFO 34 _2, also outputs a read signal to the FIFO 34 _1, of the branch portion 31 _2, Drop signals the FIFO 34 ₂ data input, connects the data output of the FIFO 34 ₁ into the insertion portion 35 _1.

As shown in FIG. 2 (c), the input / output data of the FIFOs 34 ₁ and 34 ₂ is configured such that one frame is composed of p time slots.
By making one multi-frame a time-division multiplexing frame composed of k frames, when connecting the loop network 10 and the loop network 20 line by line, the FIFOs 34 ₁ and 34 ₂ are used. And connect the lines to be connected together.

〔The invention's effect〕

As described above, the present invention has an excellent effect that the size of the connection portion does not change depending on the number of lines to be connected.

[Brief description of the drawings]

FIG. 1 is a block diagram of a loop network connection device according to an embodiment of the present invention. FIG. 2 is a frame format of the loop network connection device of the present invention. FIG. 3 is a block diagram of a conventional loop network connection device. 10, 20 ...... loop network, 11～13,21～23 ...... node, 30 _1, 30 _2, 30A ...... connection means 31 _1, 31 ₂ ...... bifurcation 32 _1, 32 ₂ ...... synchronization detection , 33 ₁ , 33 ₂ … Pulse generator, 34 ₁ , 34 ₂ … FIFO (first-in first-out memory), 35 ₁ , 35 ₂ … Insert, 36 ₁ , 36 ₂ … Branch and insert, 37 _{1 to} 37 _L , 38 _{1 to} 38 _L …… Line connection part, F ₁ , F ₂ , F _k
…… Frame, f ₁ , f ₂ …… Frame pulse, mf ₁ , mf ₂ …
… Multi-frame pulse, TS ₁ , TS ₂ , TS _m , TS _n … time slot.

Claims (2)

(57) [Claims] A plurality of nodes each using a time-division octet multiplex frame are connected to each other in a loop form, and a pair of connecting means for connecting these two loop networks is provided. Is a loop network connection device including: a branching unit that branches one of the received signals of the two loop networks in line units; and an insertion unit that inserts the output of the branching unit into the other loop network. A synchronization detection unit that detects a frame pulse and a multi-frame pulse from the reception signal of the one loop network and provides the frame pulse and the multi-frame pulse to the own branch unit and the insertion unit of the other connection unit; A pulse generating means for generating a timing signal based on the Loop network connection device, which comprises temporarily store the output of their Kibe based on the scan, and the timing signals to its own insertion portion based on the frame pulse and the timing signal from the other connecting means and FIFO for outputting the contents. 2. A time-division octet multiplexed frame of one of the two loop networks, wherein one frame is composed of a positive integer m number of time slots, one multiframe is composed of a positive integer k frames, and the other is a time division multiplexed frame. One octet multiplexed frame is composed of n frames of positive integers, one multiframe is composed of k frames of positive integers, and the time division octet multiplexed frame of the input / output data of the FIFO is p frames of positive integers. 2. The loop network connection device according to claim 1, wherein one multi-frame is composed of k positive integer frames.