JPH088938A - Looped time division multiplex communication equipment - Google Patents

Abstract

PURPOSE:To improve throughput of control information and burst data by multiplexing data in different consecutive/nonconsecutive data areas of traffic while dividing the areas at an equal interval. CONSTITUTION:An area multiplexer section at first channel exchange data of a user consecutive data area 16 and packet data of a user non-consecutive data area 17 at processing interval to obtain a user data area, and then multiplexes a monitor control information area 14 and the area at a prescribed interval to form a transmission frame 11 by adding a header 12 and a trailer 13 to the areas 14, 15 and the transmission frame 11 is sent to a highway. Since the time when the multiplexed data circulates a loop is equal to the total sum of the transmission delay of the transmission line and the delay caused by the multiplexing/-demultiplexing, the circulation delay time of data is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a private branch exchange, local
The present invention relates to a loop type time division multiplex communication device used in an area network or the like.

[0002]

2. Description of the Related Art FIG. 11 shows the configuration of a conventional loop type time division communication device.

In FIG. 11, reference numeral 1 is a loop type time division multiplex communication apparatus, and 2 is a monitoring / control terminal, which is connected to a center node apparatus (CN) 41. 42, 4
Reference numerals 3 and 44 are local node devices (LN). Less than,
These center node device (CN) and local node device (LN) are collectively referred to as a node device.

The node devices 41, 42, 43 and 44 are connected in a ring by a 0-system transmission line 31 and a 1-system transmission line 32. The 0-system transmission line 31 is a transmission line that multiplexes information during normal operation, and the 1-system transmission line 32 is a backup transmission line when a failure occurs. The user terminals 51, 52, 53, 54 are connected to the node devices 41, 42, 43, 44, respectively.

FIG. 12 is a schematic block diagram showing the internal structure of one node device shown in FIG.

In FIG. 12, a multiplexing area dividing means 21
Is connected to the transmission path receiving means 22 connected to the transmission path 31, the transmission frame timing from the adjacent node device is input, and the timing of the monitoring / control information area is sent to the monitoring / control means 4 to the line information which is continuous data. The timing of the area is sent to the circuit switching means 27, and the timing of the discontinuous data area for transmitting the IEEE 802 packet data is sent to the packet input / output means 6. The output of the transmission line receiving means 22 of the CN is connected to the phase adjusting delay means 24, and the output of the phase adjusting delay means 24 is connected to the multiplexing highway (reception side) 25.

The output of the transmission path receiving means 22 of the LN is directly connected to the multiplexing highway (reception side) 25, and the phase adjusting delay means 24 is not provided.

The multiplexing highway (reception side) 25 and the multiplexing highway (transmission side) 26 are connected to the monitoring / control means 4,
Connected to the circuit switching means 27 and the packet input / output means 6,
The transmission side data of the enhanced highway 26 is connected to the transmission line transmission means 23 connected to the transmission line 32.

Since it is sufficient to prepare the phase adjusting delay means 24 in at least one place in the loop type time division multiplex communication device, it is mounted only in the center node device 41 in FIG.

The monitoring / control terminal 2 in FIG. 11 is connected to the monitoring / control means 4 in the CN. The circuit switching user terminal 7 is connected to the circuit input / output means 54, and the circuit input / output means 54 connects the circuit switching means 5 via the circuit switching highway 53.
Connected to 2. The packet user terminal 9 is IEEE
It is connected to the packet input / output unit 6 via the E802 type communication line 8.

FIG. 13 shows a transmission frame structure used in the apparatus. The fixed-length transmission frame 11 is composed of a transmission header 12 including a frame synchronization pattern, a trailer 13 including transmission error detection information, and an information section. The information section includes a monitoring / control information area 35 of the apparatus and a user. It is composed of a continuous data area 36 for multiplexing data 37 from terminals and lines and a discontinuous data area 38 for multiplexing packet data of users. Further, each area is fixedly assigned a continuous area at a position from the beginning of the transmission frame. The information multiplexing structure for each area is shown in FIGS. 14, 15 and 16.

FIG. 14 shows a multiplexing structure of monitoring / control information of the loop type time division multiplex communication device. Since the variable-length monitoring / control information is generated discontinuously, the entire monitoring / control information area 35 in the transmission frame 11 is set as a common area for the monitoring / control means of each node device from the viewpoint of use efficiency of the transmission band. Bands are allocated and shared by all node devices.

The monitoring / control information frames 351, 352, 353 from the respective node devices are continuously secured within the area and are multiplexed by storage and speed conversion. At each boundary, tokens, flags, and Go are provided for each transmission protocol.
Identifiers 41 and 4 called Ahead pattern
By arranging 2, the boundary of the information frame and the vacant state of the area are shown, and multiple access of the shared monitoring / control information area 35 from all the node devices is realized.

Monitoring / control information frames 351 and 3 that do not fit in the monitoring / control information area 35 of one transmission frame 11.
53 is multiplexed by treating the monitoring / control information area of continuous transmission frames as continuous.

FIG. 15 shows a multiplexing structure of continuous data from the user's terminal and line. In the user continuous data area 36 in the transmission frame 11, a time slot (TS) that is divided into 8 bits from the beginning is defined, and the number of TSs that realizes the transmission band required for each user line is set as the information amount. Is assigned by the position-fixed position multiplexing method, which has the highest transmission efficiency for uncompressed continuous data. Therefore, the transmission band when one TS is secured in the transmission frame arriving every 125 μs is 64 kb / s, and the total transmission band is equal to the product of the total number of TSs and 64 kb / s. The circuit switching means performs speed conversion between the multiplexed highway and the multiplexed highway-side internal frame 361, and transfers the TS between the multiplexed highway-side internal frame 361 and the frame 362 on the switched circuit highway. The line input / output means multiplexes the data 363 from the user terminal / line to the TS assigned to the frame 362 on the exchange line highway.

FIG. 16 shows a multiplexing structure of discontinuous data in the form of packets from a terminal such as a user's computer.

Since data such as packets are generated discontinuously, the transmission frame 11 is used in terms of the efficiency of use of the transmission band.
The entire user discontinuous data area 38 is allocated as a common area to the packet input / output means of each node device, and is shared by all node devices.

Information frames 381, 382, 383 such as packets from the respective user terminals are continuously secured within the area and are multiplexed by storage and speed conversion. At each boundary, tokens and flags for each transfer protocol,
Identifier 4 called Go Ahead pattern etc.
By arranging 1 and 42, the boundary of the information frame and the vacant state of the area are indicated, and multiple access of the shared user discontinuous data area 38 from all the node devices is realized.

Information frames 381 and 383 that do not fit in the user discontinuous data area 38 of one transmission frame 11.
Is multiplexed by treating the user discontinuous data area of continuous transmission frames as continuous. FIG. 17 is a diagram showing a data transmission path.

Data transmitted and received between the user terminals 52 and 54 connected to the loop type time division multiplex communication device are transmitted by the node device and the relay node devices 41 and 43 connected by the operating transmission line 31. To be done. Backup line 3
2 is not used here.

User data is transmitted in the relay local node device 43 by the transmission line receiving means 431 and the multiplexing highway 4.
32, circuit switching means 433 or packet input / output means 4
34, multiplexing highway 432, transmission line transmitting means 435
Relay on the route.

On the other hand, in the relay center node device 41, the transmission line receiving means 411 and the phase adjusting delay means 41.
2. Multiplexing highway 413, circuit switching means 414 or packet input / output means 415, multiplexing highway 41
3. Relay by the route of the transmission line transmission means 416.

Both the monitoring / control information area, the user continuous data area, and the user discontinuous data area are transmitted via the CN phase adjustment delay means. FIG. 18 shows the detailed delay that occurs at that time.

FIG. 18 shows relay delays and multiplexing positions of user continuous data and user discontinuous data for each node device. In the figure, the number of node devices is 4 including CN.
It is assumed that the base is connected and CN, LN1, LN2, and CN are connected in this order. The horizontal axis in the figure is the elapsed time.

The transmission frame 71 having a frame length of 125 μs sent from the CN includes one user discontinuous data 711 and one user discontinuous data 712, and the adjacent L
It is sent to N1. Although only one frame is focused on in the figure, transmission frames are continuously transmitted every 125 μs. The user discontinuous data 712 includes data transmitted / received by the user's terminal and an identifier indicating a free area.

The CN transmission frame 71 passing through the transmission path arrives at LN1 after a lapse of time due to transmission delay and becomes a reception frame 72. In the LN1, a transmission line receiving means, a multiplexing highway (reception side), a monitoring / control information multiplexing means, a user continuous data multiplexing means, a user discontinuous data multiplexing means, a multiplexing highway (sending side), a transmission line After a lapse of time due to the multiplexing delay of the transmitting means, the LN1 transmission frame 73 is transmitted to the LN2. Similarly, in LN3 and LN4, a transmission delay and a multiplexing delay are added, and a transmission frame having a delayed phase is relayed.

In FIG. 18, 74 is an LN2 reception frame, 75 is an LN2 transmission frame, 76 is an LN3 reception frame, and 77 is an LN3 transmission frame. LN
The transmission frame 77 of No. 3 has a C
When it arrives at N, it becomes a CN reception frame 78. At the CN, the delay time for phase adjustment is adjusted, and the information of each area is multiplexed and sent to the same position of the next transmission frame 79.

As described above, even in the above-described conventional loop type time division multiplex communication device, the monitoring / control information in the device, the continuous data of the user, and the discontinuous data of the user are assigned to the respective transmission bands in one transmission frame. It can be efficiently multiplexed and transmitted.

[0029]

However, in the above-mentioned conventional loop type time division multiplex communication device, the user data multiplexed in the continuous data area is generally 125 μs in the user terminal at equal intervals. As shown in FIGS. 17 and 18, the communication device is monitored as shown in FIG. 17 and FIG. 18, though the continuity of the user data is maintained by providing a delay unit for adjusting the phase of the transmission frame in at least one place in the communication device. Since the control information and the discontinuous data area of the user also pass through this phase adjustment delay means, the delay time in the device of each information cannot be made less than the delay time of the phase adjustment delay means, resulting in However, there is a problem in that a large delay occurs in an identifier for multiple access and throughput is reduced.

Further, since the multiplexing highways 25 and 26 in FIG. 12 need to have a band almost equal to the communication speed of the transmission line connecting the nodes, they are connected to the multiplexing highway as the transmission capacity increases. Each circuit that implements the monitoring / control information multiplexing means, the circuit switching means, and the packet input / output means must use high-speed parts,
There is a problem that the power consumption increases and the device price rises.

The present invention solves such a conventional problem, and is an excellent loop type time division multiplex communication capable of improving the throughput of the monitoring / control information of the device and the discontinuous data of the user. The purpose is to provide a device.

[0032]

In order to achieve the above object, the present invention alternately multiplexes a monitoring / control information area of a device, a continuous data area of a user, and a discontinuous data area of a user at equal intervals. Means is provided so that only the continuous data area of the user passes through the phase adjusting delay means.

[0033]

According to the present invention, with the above-mentioned structure, the time taken for the data multiplexed in the monitor / control information area of the device and the discontinuous data area of the user to go around the loop once is the transmission delay of the transmission line and the multiplexing means. Since it becomes equal to the sum of the delays due to the multiplexing / demultiplexing, it is possible to reduce the data round-trip delay time. Furthermore, since the multiplexing position on the transmission path is almost evenly arranged over the entire transmission frame, even when individual multiplexing highways for each area are used, there is almost no need for delay means when multiplexing to the transmission multiplexing highway. As a result, the circuit can be simplified, and power consumption, heat generation amount, unnecessary radiation, and cost can be reduced.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a loop type time division multiplex communication apparatus, 2 is a monitoring / control terminal, and is connected to a center node apparatus (CN) 41. 42, 43,
Reference numeral 44 is a local node device (LN). Hereinafter, these center node device (CN) and local node device (LN) are collectively referred to as a node device.

The node devices 41, 42, 43 and 44 are connected to the environment by a 0-system transmission line 31 and a 1-system transmission line 32. The 0-system transmission line 31 is a transmission line that multiplexes information during normal operation, and the 1-system transmission line 32 is a backup transmission line when a failure occurs. The user terminals 51, 52, 53, 54 are connected to the node devices 41, 42, 43, 44, respectively.

FIG. 2 is a schematic block diagram showing the inside of one node device of FIG. In FIG. 2, the area multiplexing / demultiplexing means 25 is connected to the transmission path receiving means 22 connected to the transmission path 3, receives the transmission frame from the adjacent node device, and monitors / monitors the data in the monitoring / control information area. Data in the line information area, which is continuous data, is sent to the control means 4 to the phase adjusting delay means 24 or the line switching means 27, and data in the burst area for transmitting the IEEE 802 packet data, which is discontinuous data, is sent to the packet input / output means 6. ,
Each is demultiplexed and transmitted. Further, the area strengthening / multiplexing / separating means 25 includes a monitoring / control means 4 and a circuit switching means 2.
7. The output data from the packet input / output unit 6 is multiplexed and sent to the transmission line output unit 23 connected to the transmission line 32 connected to the adjacent node device.

It is sufficient that the phase adjusting delay means 24 is provided in at least one place in the loop type time division multiplex communication device, so that the center node device 41 in FIG.
Only implemented in.

The monitoring / control terminal 2 in FIG. 1 is connected to the monitoring / control means 4 in the CN. The circuit switching user terminal 7 is connected to the circuit input / output means 29, and the circuit input / output means 29 is connected to the circuit switching means 27 via the circuit switching highway 28. The packet user terminal 9 is IE
Packet input / output means 6 via EE802 type communication line 8
It is connected to the.

Next, the operation of the above embodiment will be described. In FIG. 2, the area multiplexing / demultiplexing means 25 alternately multiplexes or demultiplexes each area at equal intervals alternately based on the position from the beginning of the transmission frame.

FIG. 3 shows the area multiplexing / demultiplexing means 2 of FIG.
It is a conceptual diagram of the function of 5. In FIG. 3, the two input signals A and B are divided for each multiplexing unit and are alternately output to be time-division enhanced on the highway.

Area multiplexing / demultiplexing means 2 in FIG.
5 multiplexes the user continuous data (circuit switching data) area and the user discontinuous data (packet data) area first, and then the output and the monitoring / control area are alternately multiplexed.

FIG. 4 is a diagram showing the manner of area multiplexing. In FIG. 4, reference numeral 11 is a transmission frame, and three information areas are multiplexed in a portion excluding the header 12 and the trailer 13. The transmission frame length is 1 for the convenience of transmission in the user continuous data (circuit switching data) area 16.
It is 25 μs.

First, the information part of the transmission frame 11 is monitored /
The control information area 14 and the user data area 15 are multiplexed at regular intervals. In the user data area 15, user continuous data (circuit switching data) 16 and user discontinuous data (packet data) 17 are regularly spaced. It is multiplexed with.

FIG. 5 shows an example in which a frame format conforming to STM-1 of the new synchronous multiple ladder (SDH) network recommended by ITU-T is adopted as a transmission frame, and an information section is made to correspond to a C-4 container. Show.

The information part of one frame is composed of 2,340 8-bit time slots. If the monitoring / control information area is 36TS, which is 1 / 65th of the entire information section, and the user data area is 2304TS, which is 64 / 65th, the monitoring / control information area is
The bandwidth of the control information area is 2.304 Mb / s, and the bandwidth of the user data area is 147.456 Mb / s.
In the area division, the information part 2340TS is divided into 65TS, and 1TS and 64TS are allocated to the respective areas.

Next, assuming that 8/9 / 8,048TS of this user data area is a continuous data (circuit switching data) area and 1/9 / 256TS is a discontinuous data (packet data) area, it is continuous. The bandwidth of the data (circuit-switched data) area is 131.072 Mb / s, and the bandwidth of the discontinuous data (packet data) area is 16.384 Mb / s. The area is divided into user data areas 2304 and 9TS.
Each TS is divided into 8 TS and 1 TS, and assigned to each area.

FIG. 6 shows the multiplexing structure of the monitoring / control information of the loop type time division multiplex communication device which the monitoring / control means inputs / outputs, and FIG. 7 shows the continuous data (circuit switching data input / output of the user circuit switching terminal). 8) shows a multiplexing structure of discontinuous data (packet data) input / output by the user packet terminal, respectively.

In FIG. 6, since the variable length monitoring / control information is generated discontinuously, in terms of the transmission band use efficiency,
The entire monitoring / control information area 14 alternately distributed at equal intervals in the transmission frame 11 at the user data area 15 is allocated as a common area to the monitoring / control means of each node device and shared by all node devices. are doing.

The monitoring / control information frames 141, 142, 143, 144 from the respective node devices continuously secure areas in the monitoring / control information area 14 and are multiplexed by speed conversion. At each boundary, a token, a flag, an identifier 145, 146, 147 called a Go Ahead pattern, etc. is arranged for each transmission procedure rule to indicate the boundary of the information frame and the availability of the area, and the shared monitoring / control is performed. Multiple access from all node devices in the information area 14 is realized.

A monitor / control information frame 141 which does not fit in the monitor / control information area 14 of one transmission frame 11,
144 is multiplexed by treating the monitoring / control information area of continuous transmission frames as continuous.

In FIG. 7, the monitoring / control information area 14 and the user data area 15 are alternately arranged in the transmission frame 11 at equal intervals, and the continuous data (circuit switching data) area is further provided in the user data area 15. 18 and discontinuous data (packet data) areas 18 and discontinuous data (packet data) areas 17 are alternately arranged at equal intervals, and are separated by 8 bits from the beginning in the continuous data (circuit switching data) area. Timeslot (TS) is defined, and the number of TSs that realizes the required transmission band for each line of the user,
Allocation is performed by the position-fixed position multiplexing method, which has the highest transmission efficiency for continuous data in which the amount of information is not compressed.

Therefore, when one TS is secured in the transmission frame arriving every 125 μs, the transmission band is 6
4 kb / s, the total transmission band is 2,048T
It is equal to the product of S and 64 kb / s.

The circuit switching means 27 is the circuit switching highway 2
TSs are transferred between the upper frame 18 and the area multiplexing / demultiplexing means side internal frame. TS assigned to frame 18 on circuit-switched highway 28
In addition, the line input / output means 29 is connected to the user terminal / line 18
1 is multiplexed.

In FIG. 8, since data such as packets are discontinuously generated, the monitoring / control information area 14 and the user data area 15 are alternately arranged at equal intervals in the transmission frame 11 from the viewpoint of use efficiency of the transmission band. In the user data area 15, a continuous data (circuit-switched data) area 18 and a discontinuous data (packet data) area 17 are alternately distributed at equal intervals, and the user discontinuous data area 17
A band is allocated as a common area to the packet input / output unit 6 of each node device and is shared by all node devices.

Information frames 171, 172 and 173 such as packets from each user terminal 9 are continuously secured in the discontinuous data (packet data) area and are multiplexed by speed conversion. At the boundaries, tokens, flags, and identifiers 174 and 175 called Go Ahead patterns, etc. are arranged for each transmission procedure rule to indicate the boundaries of the information frame and the vacancy of the area, and shared user discontinuous data. Multiple access from all node devices in the area 14 is realized.

Information frames 171 and 173 that cannot fit in the user discontinuous data area 14 of one transmission frame 11.
Is multiplexed by treating the user discontinuous data area of continuous transmission frames as continuous.

FIG. 9 shows a data transmission path. The user terminals connected to the loop type time division multiplex communication device are 52, 5
The data transmitted and received between 4 is the transmission line 3 of 0 system in operation.
It is transmitted by the node devices 41 and 43 that relay with the node device connected by 1. In addition, the transmission line 3 of the backup system
2 is not used here.

In the relay local node device 43, the user data is transmitted to the transmission line receiving means 431, the area multiplexing / demultiplexing means 432, the circuit switching means 433 or the packet input / output means 434, and the area multiplexing / demultiplexing means 432. , And is relayed through the path of the transmission path transmitting means 435.

On the other hand, the center node device 41 for relaying
In the inside, the information multiplexed in the user continuous data (circuit switching data) area is the transmission line receiving means 411, the area multiplexing / demultiplexing means 412, the phase adjusting delay means 413,
Circuit switching means 414, area multiplexing / demultiplexing means 41
2. The information multiplexed in the order of the transmission path transmitting means 416 and the information multiplexed in the user discontinuous data (packet data) area is the transmission path receiving means 411 and the area multiplexing / demultiplexing means 412. , The circuit switching means 414, the area multiplexing / demultiplexing means 412, and the transmission path transmitting means 416 are sequentially multiplexed without passing through the phase adjusting delay means 413. FIG. 10 shows the detailed delay that occurs at that time.

FIG. 10 shows relay delays and multiplexing positions of user continuous data and user discontinuous data for each node device.

In the figure, it is assumed that the number of node devices is four including CN, and that CN, LN1, LN2, LN3, and CN are connected in this order. The horizontal axis in the figure is the elapsed time.

The transmission frame 11 having a frame length of 125 μs sent from the CN includes one user continuous data 14 and one user discontinuous data 15 and is sent to the adjacent LN1.

Although FIG. 10 focuses only on one frame, the transmission frames are continuously transmitted every 125 μs. The user discontinuous data 15 includes data transmitted / received by the user's terminal and an identifier indicating the free space.

The CN transmission frame 11 passing through the transmission path arrives at LN1 after a lapse of time due to transmission delay and becomes a reception frame 111. In LN1, the time due to the multiplexing delay by the transmission line receiving means, area multiplexing / demultiplexing means, monitoring / control information multiplexing means, user continuous data multiplexing means, user discontinuous data multiplexing means, transmission path transmitting means After the lapse of time, the LN1 transmission frame 112 is sent out toward the LN2.
Becomes At this time, the phase delay between the transmission frames to be transmitted and received is set in accordance with the multiplexing delay time of the user continuous data in order to minimize the delay of the position-multiplexed user continuous data. Since the multiplexing delay of the continuous data in the circuit switching means and the multiplexing delay of the discontinuous data in the packet input / output means do not always match, the discontinuous data is not particularly delayed in the area multiplexing / demultiplexing means. , Is multiplexed in the area immediately after the discontinuous data area distributed at equal intervals. Note that FIG. 10 shows a case where the multiplexing delay of discontinuous data is smaller than the multiplexing delay of continuous data.

Similarly, in LN2 and LN3, a transmission delay and a multiplexing delay are added, and a transmission frame having a delayed phase is relayed. In FIG. 10, 113 is an LN2 reception frame, 114 is an LN2 transmission frame, 115 is an LN3 reception frame, and 116 is an LN3 transmission frame.
The transmission frame 116 of the LN3 arrives at the CN after the elapse of time due to the transmission delay and becomes the CN reception frame 117. CN
Then, adjust the delay time by the phase adjustment delay means,
The information in the user continuous data area is the next transmission frame 11
8 are multiplexed and transmitted to the same position.

On the other hand, the monitoring / control information and the information in the user discontinuous data area do not pass through the phase adjusting delay means but are multiplexed in an area immediately after the area which is dispersed at equal intervals.

As described above, according to the above embodiment, since the user discontinuous data 3 in FIG. 10 does not pass through the phase adjusting delay means, the loop round delay can be reduced,
This has the advantage that the number of cycles of the identifier for multiple access control such as the token in the token passing procedure and the GoAhead pattern in the HDLC loop mode procedure increases, and the throughput can be improved.

Similarly, with respect to the monitoring / control information of the apparatus, there is an advantage that the control can be speeded up and the throughput can be improved by reducing the delay.

Further, according to the above-mentioned embodiment, since the multiplexing highway having a band substantially equal to the band of the transmission line is unnecessary, the monitoring / control means, the circuit switching means, the packet input / output means, etc. can be manufactured at a low cost. This has the effect that it can be realized using components and that power consumption and unnecessary radiation can be reduced.

[0071]

As is apparent from the above embodiment, the present invention is one in which data areas of traffic different from continuous and discontinuous are dispersed at equal intervals and multiplexed, and the transmission efficiency and delay time of continuous data are reduced. It has an advantage that the transmission delay of discontinuous data can be increased and the throughput can be improved without deteriorating.

Furthermore, according to the present invention, since a multiplexing highway having a band substantially equal to the band of the transmission line is unnecessary, the main part of the device can be realized by using low-priced parts and the power consumption can be reduced. It also has the effect of reducing unnecessary radiation.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a loop type time division multiplex communication device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an internal configuration of a node device according to the present embodiment.

FIG. 3 is an explanatory diagram showing a multiplexing function of the multiplexing means in this embodiment.

FIG. 4 is a structural diagram of a transmission frame used in the device of this embodiment.

[Fig. 5] Fig. 5 shows C- of SDH in a transmission frame in this embodiment.
4 is a diagram showing an example of the structure of a transmission frame using the No.

FIG. 6 is a diagram showing a multiplexing structure of monitoring / control information in the present embodiment.

FIG. 7 is a diagram showing a multiplexing structure of user continuous data in the present embodiment.

FIG. 8 is a diagram showing a multiplexing structure of user's discontinuous data in the present embodiment.

FIG. 9 is a diagram showing a data transmission path in the present embodiment.

FIG. 10 is a diagram showing a relay delay and a multiplexing position in the present embodiment.

FIG. 11 is a schematic block diagram of a conventional loop type time division multiplex communication device.

FIG. 12 is a block diagram showing an internal configuration of a conventional node device.

FIG. 13 is a structural diagram of a conventional transmission frame.

FIG. 14 is a diagram showing a conventional multiplexing structure of monitoring / control information.

FIG. 15 is a diagram showing a conventional multiplexing structure of continuous data of users.

FIG. 16 is a diagram showing a conventional multiplexing structure of user discontinuous data.

FIG. 17 is a diagram showing a conventional data transmission path.

FIG. 18 is a diagram showing a conventional data relay delay and a multiplexing position.

[Explanation of symbols]

 1 loop type time division multiplex communication device 2 monitoring / control terminal 4 monitoring / control means 6 packet input / output means 7 continuous data (line data) terminal of user 8 communication line for discontinuous data (packet data) 9 non-use of user Continuous data (packet data) terminal 11 Transmission frame 14 Monitoring / control information area 15 User data area 16 User continuous data (circuit switching data) area 17 User discontinuous data (packet data) area 22 Transmission line receiving means 23 Transmission Route transmitting means 24 Position adjusting delay means 25 Area multiplexing / demultiplexing means 27 Circuit switching means 28 Circuit switching highway 29 Circuit input / output means 31 0 transmission line 32 1 transmission line 41 Center node device (CN) 42, 43 , 44 Local node equipment (LN) 51, 52, 53, 54 User terminal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Nishi Nishi No. 3-1, Tsunashima Higashi 4-chome, Kohoku Ward, Yokohama City, Kanagawa Prefecture Matsushita Communication Industry Co., Ltd. 3-3-1 Matsushita Communication Industrial Co., Ltd.

Claims (1)

[Claims] 1. A loop-type time division multiplex communication device in which node devices are connected to each other through a ring-shaped transmission line, wherein a frame on the transmission line has a communication region for monitoring / control of the device and a user data region at equal intervals. A means for multiplexing and a means for multiplexing a continuous data area and a discontinuous data area in the user data area at equal intervals, and relaying is performed only in the continuous data area through a phase adjusting delay means due to a transmission delay. Loop type time division multiplex communication device.