JPH098849A - Connection information registering method in channel multiplex network system - Google Patents

Abstract

PURPOSE: To eliminate the need of manual registration using the input/output part of a terminal and to provide a simple registering method without an error. CONSTITUTION: The terminal is provided with a terminal connection table consisting of connection information of the other terminals, and transmits data by using a packet to which a header having columns 1 and 2 instructing the number of repeating times to a terminal being a reception destination and the wavelength of an optical signal used at the time of transmission are added. A node device repeating a packet executes a prescribed operation to the column 1 instructing the number of repeating times and rewrites it at the time of repeating. When a result that the prescribed operation is executed shows a prescribed value, the packet is outputted to the terminal and communication is executed. The terminal requesting registration to the terminal connection table of the other terminal sets the identification number 7 of its own terminal, the received wavelength 6 and the initialization value 5 of the column displaying the number of repeating times as data, transmits a registration request packet to which the header is added and the received terminal registers information to its own terminal connection table by using data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for registering connection information in a channel multiplex network system, and more particularly to a node device for connecting a plurality of terminals and a plurality of channels for connecting a plurality of the node devices. In a network system including a channel multiplex transmission line using a node, and in the node device and the network system, data to be transmitted is packetized, and this packet is relayed and transmitted by a node device located in the middle of a transmission source terminal and a reception destination terminal. The present invention relates to a connection information registration method in a multi-hop type channel multiplexing network system.

[0002]

2. Description of the Related Art In recent years, various types of network systems using optical wavelength division multiplexing transmission lines using a plurality of wavelengths have been studied for the purpose of increasing the speed of networks connecting terminals with the increase in speed of terminals. It has been done. One of these is a multi-hop type in which data to be transmitted is relayed and transmitted by a node device located in the middle of a transmission source terminal and a reception destination terminal. This method is described in “WDM-Base” by Biswanath Mukherjee.
d Local Lightwave Network
s PartII: Multihop System
s "IEEE Network July (199
2) It is explained in P20-P32.

FIG. 7 shows a configuration example of a multi-hop type network system configured by using a ring type wavelength division multiplexing transmission line and a hub type node device, and an example in which four node devices are connected by an optical fiber. Shows. Code 9
Reference numeral 12 denotes the node device shown in FIG. 8, to which eight terminals are connected via eight sub transmission lines, respectively. Reference numerals 13 to 16 denote optical fibers that are optical wavelength division multiplexing transmission paths.

FIG. 8 shows a configuration example of a node device of the above-mentioned multi-hop type system example. In FIG. 8, reference numeral 17
Is a control unit that controls the reading of the buffer and the transmission wavelength of the variable wavelength transmission unit. Reference numeral 18 denotes a buffer control unit, which controls reading of a packet to be transmitted at the transmission wavelength of the variable wavelength transmission unit set by the wavelength control unit from the buffer. Reference numeral 19 is a wavelength control unit,
The transmission wavelength of the variable wavelength transmission means is controlled according to a predetermined transmission wavelength control pattern. Reference numeral 20 is an optical fiber which is an optical wavelength division multiplexing transmission line. Reference numeral 21 is a branching device for branching the optical signal transmitted through the optical fiber 20
Output to each fixed wavelength receiver. Reference numerals 22 to 29 are
The fixed wavelength receiving unit I to the fixed wavelength receiving unit VIII.
From fixed wavelength receiving section I22 to fixed wavelength receiving section VIII29
Respectively receives only packets transmitted by optical signals of one wavelength corresponding to wavelengths λ1 to λ8. Reference numerals 30 to 37 denote demultiplexing / inserting units I to VIII, which demultiplex the packets to be transmitted to the terminal via the sub transmission path from the packet streams output from the fixed wavelength receiving units 22 to 29. It has a function of sending to the terminal and inserting a packet transmitted from the terminal via the sub-transmission path into the packet stream output from the fixed wavelength receiving units 22 to 29. Reference numerals 38 to 45 denote buffers I to VIII, which have a function of temporarily storing the packets output from the separating / inserting units 30 to 37. Code 4
6 to 53 are variable wavelength transmitters I to V.
Under the control of the controller 17, the packets output from the buffers 38 to 45 are converted into optical signals of a predetermined wavelength within the wavelength λ1 from the wavelength λ1 and the optical fiber 20 passes through the multiplexer 54. Send to. Reference numeral 54 is a multiplexer, which multiplexes the optical signals of the wavelengths λ1 to λ8 transmitted from the eight variable wavelength transmission units 46 to 53, and the optical fiber 2
Emit to 0. Reference numerals 55 to 62 denote sub transmission paths I to VIII, which serve as a transmission path for packets between the separation / insertion units 30 to 37 and the terminals. Reference numerals 63 to 70 denote terminals I to VIII connected to the node device via the sub transmission path I through the sub transmission path VIII, respectively, and receive packets output from the separation / insertion units 30 to 37, and A packet to be transmitted to another terminal is created and transmitted to the separating / inserting units 30 to 37 via the sub transmission lines 55 to 62.

FIG. 9 shows an example of the configuration of a terminal. In FIG. 9, reference numeral 71 denotes an I / F (Interface) unit, which sends a packet output from the packet processing unit to the sub transmission lines 55 to 62, and a packet input from the sub transmission line to the packet processing unit. Output. Reference numeral 72 denotes a packet processing unit, which refers to the terminal connection table and specifies which node device the receiving destination terminal is connected to, in order to specify which node device the destination terminal is connected to. It is possible to specify it if you know whether or not it is, so find the value of the number of relays display column that shows the number of relays and the value of the used wavelength designation column, write these in the specified column of the header, add it to the data to be transmitted, and assemble the packet With I
The header part of the received packet input via the / F unit 71 is removed, and a predetermined receiving process is performed. Reference numeral 73 is a terminal connection table, which is related to the terminals connected to the network system, which terminal is connected to which node device, and the separation / insertion unit in which the terminal is connected via the sub transmission lines 55 to 62. The terminal connection table as shown in Table 1 has connection information of terminals such as what wavelengths (hereinafter, reception wavelengths) are received by the fixed wavelength reception units 22 to 29 which output packets to 30 to 37. Reference numeral 74 is an input / output unit for rewriting the contents of the terminal connection table 73 without going through the network system when a new terminal is newly connected to the network system or when the connection relationship of the terminals is changed. It has an interface function such as a keyboard and a display device.

[0006]

[Table 1] FIG. 10 is a configuration example of a packet used in the above-mentioned multi-hop system example. In FIG. 10, reference numeral 75
Is a relay number display column showing the number of relays required for transmission from the source node device to the destination node device. Each of the relay node devices 9 to 12 can know whether or not the adjacent node device downstream in the transmission direction is the destination node device by subtracting the value in the relay count display field. Furthermore, whether or not this value is 0 makes it possible to know whether or not the own node device is the receiving destination. Reference numeral 76 is a use wavelength designation field, which designates a wavelength used in relay transmission. The relay number display column 75 and the used wavelength designation column 76 are header parts. As shown in Table 2, the values used in the used wavelength designation column 76 of the header section are assigned 1 to 8 as the used wavelength designation column values for the respective transmission wavelengths λ1 to λ8. Reference numeral 77 is a data section carried by this packet.

[0007]

[Table 2] FIG. 11 is an internal configuration diagram of the separation / insertion unit I to the separation / insertion unit VIII of the node device used in the above-described multi-hop type system example. Separation insertion part I30 to separation insertion part VI
All the internal configurations of II37 are the same. In FIG. 11, reference numeral 78 is a comparator, which compares whether or not the value of the relay count display field 75 of the packet output from the latch 79 is 0, and when it is 0, the separation instruction is issued, and when it is not 0, the relay is performed. The instruction is output to the demultiplexer 81.
Reference numeral 79 is a latch, which stores a relay number display field 75 of packets output from the fixed wavelength receiving units 22 to 29,
The value is output to the comparator 78. Reference numeral 80 is I /
The F unit outputs the packet output from the demultiplexer 81 to the sub transmission lines 55 to 62 and outputs the packet input from the sub transmission line to the FIFOI.
Reference numeral 81 is a demultiplexer, which outputs the input packet to the I / F unit 80 when the output of the comparison result of the comparator 78 is the separation instruction, and outputs it to the FIFO II when it is the relay instruction. Reference numeral 82 denotes an insertion control unit, which controls the reading of the FIFO I and the FIFO II, and instructs the selector 85 which FIFO should be selected to receive the packet transmitted from the sub transmission lines 55 to 62 at a fixed wavelength. Control is performed to insert the packet stream output from the units 22 to 29. Code 83
Reference numeral 84 denotes FIFOI and FIFOII, which temporarily store the input packets and output them to the selector 85 in the input order under the control of the insertion control unit 82. Reference numeral 85 is a selector, which selects the FIFO storing the packet signal to be output according to an instruction from the insertion control unit 82.

FIG. 12 is an internal block diagram of buffers I to VIII used in the above-mentioned multi-hop type system example. The buffers I to VIII have the same internal structure. In FIG. 12, reference numeral 8
Reference numeral 6 denotes a demultiplexer, which is a used wavelength designation field 76 in the header part of the packet output from the demultiplexing / inserting parts 30 to 37
To the latch I87, and the relay count display field 75 to the latch II8.
8, the data section 77 is output to the shift register 90, respectively. Reference numeral 87 is a latch I, which stores the used wavelength designation field 76 in the header portion of the packet and outputs the value to the write address counter 91 and the selector 92. Reference numeral 88 is a latch II, which stores the relay count display field 75 in the header part of the packet and outputs the value to the down counter 89. Reference numeral 89 is a down counter, which is a latch II 88.
Relay number display field 7 in the header part of the packet output from
Subtract 5 and output to the selector 92. Reference numeral 90 is a shift register, which gives a desired delay to the data portion 77 of the packet output from the demultiplexer 86, and outputs the packet to the selector 92. Reference numeral 91 is a write address counter, which generates a write address of the dual port memory 94 in which the packet should be written according to the value of the used wavelength designation field 76 of the header part of the packet output from the latch I87, and sequentially writes the packet. The address signal is output to the dual port memory 94. Reference numeral 92 denotes a selector, which is used wavelength designation column 76 of the header part of the packet output from the latch I87, the value of the relay count display column 75 subtracted by the down counter 89, and the desired output from the shift register 90. By sequentially selecting the data portion 77 of the packet given the delay, the packet in which the value in the relay number display field 75 is subtracted is reconstructed and output to the dual port memory 94. Reference numeral 93 is a read address counter, which outputs an address signal for sequentially reading packets to the dual port memory 94, using the offset value output from the buffer control unit 18 in the control unit 17 as a read start address. Reference numeral 94 indicates
It is a dual-port memory for writing and reading packet data independently. The storage area of the dual port memory 94 is divided into eight areas according to the wavelength at which the packet should be transmitted. The storage areas I to VIII correspond to the transmission wavelengths λ1 to λ8, respectively. The start address of each area is A1, A2, A
3, A4, A5, A6, A7 and A8.

In the above-mentioned multi-hop type system example, the packet processing unit 72 of the terminal for transmitting data refers to the terminal connection table 73 and refers to the value of the relay count display column 75 corresponding to the destination terminal and the wavelength used. The values of the designation column 76 are obtained, these are written in a predetermined column of the header, added to the data to be transmitted to assemble a packet, and the separation / insertion units 30 to 37 of the node device are connected via the sub transmission lines 55 to 62.
To transmit.

The packet sent from the source terminal is
The separation / insertion units 30 to 37 insert the packets into the packet streams output from the fixed wavelength reception units 22 to 29, and the buffer units 38 to 38.
At 45, the value in the number-of-relays display field 75 is subtracted and temporarily stored in the storage area corresponding to the wavelength specified in the used wavelength specification field, and then transmitted from the variable wavelength transmission units 46 to 53 as an optical signal of a predetermined wavelength. And is received by the fixed wavelength receiving units 22 to 29 corresponding to the wavelength of the node device located downstream. Then, in the separation / insertion units 30 to 37, it is detected whether or not the value in the relay count display field 75 is “0”,
If it is not "0", it is output to the buffers 38 to 45, the value of the relay number display field 75 is subtracted, and then transmitted again to the downstream node device. When this relay operation is repeated and the value in the relay count display column 75 becomes “0”, the sub transmission lines 55 to 6
After being separated into two and transmitted, the packet processing unit 72 of the terminal
Is received and processed.

In this relay operation, the packet is separated / inserted by the receiving / destination terminal connected via the sub-transmission lines 55-62 based on the value of the used wavelength designation field 76.
To 37 for outputting fixed wavelength receiving units 22 to 29
Is converted into an optical signal of a wavelength that is received and transmitted.

[0012]

In the above-mentioned multi-hop type system example, the terminal of the transmission source is searched in the terminal connection table, and the used wavelength designation column and the relay number display column corresponding to the destination terminal are set. By doing so, relay processing is performed in the node device based on these two values, and the packet is transmitted to the desired terminal. Therefore, compared with the case where the identification number of the destination terminal is specified as the destination address for transmission, high-speed relay processing is possible.
Since the terminal that transmits the packet needs to have the terminal connection table, there are the following problems.

That is, when a new terminal is newly connected to the network system or when the connection relationship of the terminals is changed, new registration is performed in the terminal connection table of all terminals on the network system, or correction registration is performed. There is a need to. However, since these are manually performed using the input / output unit of the terminal, the operation on each terminal is complicated and the operation amount is large,
There was a problem that mistakes frequently occurred. Furthermore, when the scale of the network system is large and a large number of terminals are connected over a wide area, the terminal connection table of all terminals connected to the network system is manually operated using the input / output unit. It was difficult to rewrite with.

Therefore, the present invention has been made in view of the problems of the above-mentioned multi-hop type system example, and when a new terminal is newly connected to the network system or when the connection relation of the terminal is changed, In the connection information registration method for new registration or correction registration to the connection table, it is not necessary to manually register using the input / output unit of the terminal,
The purpose is to provide a simple and error-free method.

[0015]

In order to achieve the above object, the present invention solves the problems by using the following channel multiplex network system and connection information registration method.

A connection information registration method in a channel multiplex network system according to the present invention is a transmission line in which a plurality of node devices to which terminals are connected and a plurality of channels are multiplexed, and a packet is transmitted between the node devices. In a network system consisting of, a connection information registration method for registering the connection information of the connecting terminal to the network system in another terminal, the registration requesting terminal requesting the other terminal to register the connection information of its own terminal. Is characterized in that it transmits a registration request packet to which each registered request terminal is added with identification information for identifying its own terminal and connection node information indicating a node device to which the own terminal connects.

More specifically, the following modes are also possible. When the registration requesting terminal is a terminal capable of receiving only the channels received by some of the channels received by the node device to which the terminal connects, the registration requesting terminal can receive itself Reception channel information indicating a channel is further added to the registration request packet.

The method of transmitting the registration request packet to each registered request terminal is such that the registration request terminal sends the registration request packet sent by the terminal via the first node apparatus which is the node apparatus to which the terminal is connected. Then, the first node device which is the target node device in the present process sequentially transmits the registration request packets so that the node device next to the first node device receives the registration request packets on all channels received by the target node device. In the process and the second process, the node device next to the target node device in the process before performing this process is the target node device in this process, and the target node device in the process target node device The registration request terminal or the registration request packet transmission terminal specified in the previous step of this process sequentially requests registration so that it is received on all channels received by the device. A second step of sending the packet, after the first step, the second step is repeated until it receives a registration request packet registration request end Not the own terminal is sent.

The registration requesting terminal is a terminal capable of receiving only the channel received by one of the channels received by the node device to which the terminal is connected, and the registration requesting packet is sent to each registered requesting terminal. How to send
The registration request terminal sends the registration request packet sent by the terminal to the next node of the first node device, which is the target node device in this process, via the first node device which is the node device to which the terminal is connected. A first step of sequentially transmitting registration request packets so that the node device of the target node device receives all channels received by the target node device;
In the second process, the node device next to the target node device in the process before performing this process is set as the target node device in this process, and the target node device receives in the target node device in this process. The registration request terminal, or the registration request packet transmission terminal specified in the previous step of this step, sequentially transmits the registration request packets so that the registration request packets are received by all the channels. After the above step, the second step is repeated until the registration request terminal receives the registration request packet sent by the own terminal. In each step of the first and second steps, the target node When the device receives the registration request packet,
The registration request packet, or the registration request packet transmitting terminal designated in the step before each step, is sequentially registered so that the registration request packet transmitted by the channel that the registration request terminal can receive is received last. Is sent.

The registration request terminal, or the registration request packet transmission terminal specified in the step before each step, transmits the registration request packet to be transmitted so that the registration request packet to be transmitted is received by a desired channel in the target node device. Information indicating a target node device and information designating a channel to which the registration request packet in the node device before the target node device should be transmitted are added to the packet.

Further, the information indicating the target node device is information indicating the number of times the registration request packet is relayed.
The node device that relays the registration request packet performs an operation on the information indicating the number of times the registration request packet is relayed when relaying the registration request packet, and the information indicating the number of times the registration request packet is relayed is It will be rewritten afterwards to indicate the number of times it will be relayed. The registration request terminal, or the registration request packet transmission terminal specified in the step before each step, transmits the registration request packet in the next step to at least one of the registration request packets transmitted in each step. Information for specifying the request packet transmitting terminal is added. The registration request terminal has at least one of the registration request terminals transfer the connection information of each terminal in the network system. The channels are based on light, and the plurality of channels are based on a plurality of lights having different wavelengths.

Further, the network system according to the present invention is a network system comprising a plurality of node devices to which terminals are connected and a transmission line for multiplexing a plurality of channels, and a transmission line for transmitting a packet between the node devices. The connection information registration method described above is used when registering the connection information of the terminal to be connected to the network system in another terminal.

The following modes are also possible. The node device can send the packets respectively received on the plurality of channels on desired channels. The node device has means for outputting to the terminal a packet to be output to the connected terminal among the received packets. As a packet to be transmitted, a packet to which information designating the number of relays by the node device is added is used, and the node device, when relaying a packet, performs an operation on the information indicating the number of relays of the packet. The information indicating the number of times the packet is relayed is rewritten to indicate the number of times the packet is subsequently relayed.

[0024]

In the connection information registration method of the present invention based on the above-described method, the fact that the registration request packet is transmitted to all terminals and the registration request packet is transmitted to all terminals via the network system, The registration request packet transmitted from the own terminal is detected by being transmitted to the own terminal. .

[0025]

【Example】

(Embodiment 1) FIG. 1 is a first embodiment of the present invention, and is a configuration of a registration request packet suitably used in the terminal registration method in the example of the multi-hop system shown in FIGS. 7 to 12. Here is an example. The registration request packet is transmitted from the relevant terminal to an existing terminal when newly connected to the network system or when the connection condition is changed, and the terminal which receives the registration request newly registers in the terminal connection table. .

In FIG. 1, reference numeral 1 is a relay number display column showing the number of relays required for transmission from the source node device to the destination node device. At the time of relaying, each node device can know whether or not the adjacent node device downstream in the transmission direction is the destination node device by subtracting the value in the relay count display field 1. Furthermore, whether or not this value is 0 makes it possible to know whether or not the terminal connected to the own node device is the destination of reception. Reference numeral 2 is a use wavelength designation field, which designates a wavelength used in relay transmission. As shown in Table 2, the values used in the used wavelength designation column 2 of the header section are assigned 1 to 8 as the used wavelength designation column values for the respective transmission wavelengths λ1 to λ8. Reference numeral 3 is a packet type identification field, that is, a field indicating the type of this packet, and a value indicating a registration request packet is set as the packet type. Reference numeral 4 is another header part. The relay number display column 1, the used wavelength designation column 2, the packet type identification column 3, and the other header portion 4 are header portions.

Reference numeral 5 is an initial setting value column of the relay count display column, and the value set in the relay count display column 1 is written in the terminal of the transmission source of the registration request packet. Reference numeral 6 denotes a newly registered terminal reception wavelength column, in which the terminal of the transmission source of the registration request packet outputs the packet to the separation / insertion units 30 to 37 connected via the sub transmission lines 55 to 62. Wavelengths received by ~ 29 (hereinafter, simply reception wavelength)
Is written. Reference numeral 7 is a new registration terminal identification field, in which the terminal identification number of the transmission source terminal of the registration request packet is written. Reference numeral 8 is another data part.
Initial setting value field 5, new registration terminal reception wavelength field 6, new registration terminal identification field 7 and other data section 8
Is the data part carried by this packet.

FIG. 2 is a structural example of a transfer request packet according to the present invention. In the transfer request packet, a value indicating the transfer request packet is set as the packet type in the packet type identification field. The data section is provided with a newly registered terminal identification field 7.

FIG. 3 is an operation flowchart of the terminal that is the transmission source of the registration request packet in the first embodiment of the present invention.

FIG. 4 is an operation flowchart of the terminal that receives the registration request packet according to the first embodiment of the present invention.

An embodiment of the terminal registration method according to the present invention using the above registration request packet and transfer request packet will be described.
In the configuration example of the network system shown in FIG. 7 using the node device configuration example of FIG. 8 described above, a case where the terminal I63 connected to the node device I9 is newly connected to the network system will be described as an example. In the following description,
For the same components of different terminals, the same reference numerals shown in FIGS. 7, 8, 9, 10, 11 and 12 are used for convenience.

First, the terminal I63, which is a newly registered terminal connected to the node device I9, sets the value of the repeat count display column 1 of the header to "1" and the value of the used wavelength designation column to "1".
The registration request packet is created, and these are transmitted to the separation / insertion unit I30 of the node device I9 via the sub transmission line I55. At this time, the initial setting value column 5 of the relay request display column of the registration request packet is set to “1”, and the newly registered terminal reception wavelength column 6 indicates that the terminal I63 is connected to the separation / insertion unit I30 connected via the sub transmission line I55. The fixed wavelength receiving unit I22 that outputs a packet sets the value "1" representing λ1 which is the wavelength received by the fixed wavelength receiving unit I22, and the newly registered terminal identification field 7 indicates the terminal I6.
Write the identification number of 3. In the following description, this packet is called registration request packet A.

I / I of the separation / insertion unit I30 of the node device I9
The F unit 80 sequentially writes the registration request packet A transmitted via the sub transmission line I55 into the FIFO I83.
After the writing of the registration request packet A to the FIFOI 83 is completed, the insertion control unit 82 finds the break in the packet stream read from the FIFOII 84 and sets the input of the FIFO to be output by the selector 85 to the input from the FIFOI 83. After switching, the reading of the FIFO II 84 is stopped and the reading of the FIFO I 83 is started.
Then, after the reading of the registration request packet A written in the FIFOI 83 is completed, the insertion control unit 82 determines that the selector 8
5, the input of the FIFO to be output is again FIFOII8
Switch to set to input from 4, FIFOI83
Reading is stopped and the reading of the FIFOII 84 is restarted. The registration request packet A output from the selector 85 is input to the buffer I38.

Demultiplexer 86 of buffer I38
Outputs the used wavelength designation column 2 of the header part of the registration request packet A output from the separation / insertion unit I30 to the latch I87, the relay count display column 1 to the latch II88, and the data unit 77 to the shift register 90. The latch I87 stores the used wavelength designation field 2 in the header portion of the registration request packet A and outputs the value to the write address counter 91 and the selector 92. The latch II 88 stores the relay count display field 1 in the header part of the registration request packet A, and outputs the value to the down counter 89. The value “1” in the relay count display field 1 of the header portion of the registration request packet A output from the latch II 88 is decremented by the down counter 89 to “0”.
And is output to the selector 92. Shift register 9
0 gives a desired delay to the data portion 77 of the registration request packet A output from the demultiplexer 86 and outputs it to the selector 92. The selector 92 uses the wavelength designation field 2 in the header of the registration request packet A output from the latch I87, the value in the relay display field 1 subtracted by the down counter 89, and the desired delay output from the shift register 90. Data part 77 of the registration request packet A
By sequentially selecting and, the registration request packet A obtained by subtracting the value in the relay count display field 1 is reconfigured and output to the dual port memory 94. On the other hand, the write address counter 91 starts writing in the dual port memory 94 in which the registration request packet A should be written according to the value “1” in the used wavelength designation field 2 in the header part of the registration request packet A output from the latch I87. The address is set to A1, and the address signals for writing packets sequentially are output to the dual port memory 94. The registration request packet A reconfigured via the selector 92 is input to the input port of the dual port memory 94, and is sequentially written in the storage area I in accordance with the address output from the write address counter 91.

In this way, after the registration request packet A is written in the storage area I, the wavelength controller 1 in the controller 17
Under the control of 9, the transmission wavelength of the variable wavelength transmission unit I46 is λ
When set to 1, the buffer controller 18 in the controller 17
Outputs the offset value A1 corresponding to the storage area I to the read address counter 93 of the buffer I38. Based on this offset value A1, the read address counter 93 sequentially increments the counter to generate an address for reading the registration request packet A written in the storage area I, and the dual port memory 9
4 is output. The registration request packet A is sequentially read from the output port of the dual port memory 94 by this read address and is output to the variable wavelength transmission unit I46. Since the transmission wavelength of the tunable wavelength transmitter I46 is set to λ1, the registration request packet A is sent from the tunable wavelength transmitter I9 to the multiplexer 54 as an optical signal of wavelength λ1.
In the multiplexer 54, the optical signals of different wavelengths, which are transmitted from the variable wavelength transmitter II47 from the other variable wavelength transmitter II47, are multiplexed, emitted to the optical fiber 20, and transmitted to the adjacent node device II10 downstream. To be done.

A node device II is used as an optical signal of wavelength λ1.
The registration request packet A transmitted to the node 10 is received by the fixed wavelength receiver I22 of the node device II10,
It is output to the separation / insertion unit I30. The latch 79 of the separation / insertion unit I30 stores the relay count display field 1 of the registration request packet A output from the fixed wavelength reception unit I22, and outputs the value to the comparator 78. Comparator 78
Outputs a separation instruction to the demultiplexer 81 because the value of the relay count display column 1 of the registration request packet A output from the latch 79 is “0”. Demultiplexer 81
Receives the separation instruction from the comparator 78, and outputs the input registration request packet A to the I / F unit 80. As a result, the registration request packet A is output to the I / F unit 80, transmitted through the sub-transmission line I55, and then received by the terminal I63 which is the destination of the reception. In the packet processing unit 72, the packet type identification field of the header is received. 3 is read. Since the value indicating the registration request packet is set in this column,
Using the values of the initial setting value column 5, the newly registered terminal reception wavelength column 6 and the newly registered terminal identification column 7 of the relay count display column of the data part of this packet, the terminal connected to the node device I9 in the terminal connection table 73 I63 is newly registered. This time,
The value of the number of times of relaying in Table 1 is set to a value "3" obtained by subtracting the value "1" in the initial setting field 5 of the number of times of relaying display field from the number "4" of node devices connected to the network system.

In this way, the terminal I63 connected to the node device I9 which is the transmission source of the registration request packet is registered in the terminal connection table 73 of the terminal I63 connected to the node device II10.

After transmitting the registration request packet A, the terminal I63, which is a newly registered terminal connected to the node device I9, sets the relay frequency display column 1 of the header to "1" and sets the value of the wavelength designation column 2 to "2". Seven registration request packets from "8" to "8" are created, and these are transmitted to the separation / insertion unit I30 of the node device I9 via the sub transmission line I55 similarly to the registration request packet A described above. At this time, the values of the initial setting value column 5, the new registration terminal reception wavelength column 6 and the new registration terminal identification column 7 of the relay count display column of the 7 registration request packets are the same as those of the registration request packet A. These seven registration request packets are processed in the same manner as the registration request packet A, and output from the separating / inserting unit I30 to the buffer I38. In the buffer I38, the value "1" in the relay count display column 1
Is subtracted by the down counter 89 to become “0”, and is written in the storage areas II to VIII according to the value of the used wavelength designation field 2 in the header part of the seven registration request packets.
In this way, seven registration request packets are stored in the storage area II.
From VIII to VIII, under the control of the wavelength control unit 19 and the buffer control unit 18 in the control unit 17, the variable wavelength transmission unit II4 at the predetermined wavelength set in the used wavelength designation field 2
7 is transmitted from the variable wavelength transmission unit VIII53 to the adjacent node device II10 on the downstream side.

The seven registration request packets transmitted to the node equipment II10 are the fixed wavelength receiver I of the node equipment II10 according to the wavelength set in the used wavelength designation field 2.
I23 is received by the fixed wavelength receiving unit VIII29, separated from the demultiplexing inserting unit II31 by the demultiplexing inserting unit VIII37 in the same manner as the registration request packet A, and output from the terminal II64 to the terminal VIII70 via the sub transmission lines. From terminal II64 to terminal VIII70,
Similar to the registration request packet A, the terminal I63 connected to the node device I9 is newly registered in the terminal connection table 73.

In this way, the terminal I63 connected to the node device I9 which is the transmission source of the registration request packet changes from the terminal I63 connected to the node device II10 to the terminal VIII7.
0 is registered in the terminal connection table 73.

Next, the terminal I63, which is a newly registered terminal connected to the node device I9, displays the relay count display field 1 in the header.
Is set to “2” and the values of the used wavelength designation column 2 are set to “1” to “8”, and eight registration request packets are created and transmitted. At this time, the values of the initial setting value column 5, the new registration terminal reception wavelength column 6, and the new registration terminal identification column 7 of the relay count display column of the eight registration request packets are the same as those of the registration request packet A. These eight registration request packets are processed by the node device I9 in the same manner as the registration request packet A, the value of the relay count display field 1 is subtracted from "2" to "1", and the result is output to the node device II10. In this embodiment, since each node device can send out a packet received at any wavelength by a desired wavelength, the node devices I9 to II
When outputting to 10, it is not necessary to specify the wavelength and to transmit. In the separation / insertion units 30 to 37 of the node device II10,
Since the value of the relay number display column 1 is "1", the value is not separated but is output to the buffers 38 to 45, the value of the relay number display column 1 is subtracted from "1" to "0", and variable wavelength transmission is performed. Part 4
Output from 6 to 53 to the node device III11. In the node device III11, the value of the relay count display column 1 is “0”.
From terminal I63 to terminal VII, respectively.
The data is sent to I70 and the new registration processing is performed as described above.
In this way, the terminal I63 connected to the node device I9 that is the transmission source of the registration request packet
It is registered in the terminal connection table 73 of the terminal VIII70 from the terminal I63 connected to the.

Subsequently, the terminal I63, which is a newly registered terminal connected to the node device I9, sets the relay count display field 1 of the header to "3" as described above, creates and sends eight registration request packets. .

These eight registration request packets are relayed by the node devices II10 and III11 in the same manner as described above, and the eight terminals I6 connected to the node device IV12.
3 is received by the terminal VIII70 from the terminal 3 and is connected to the node device I9 which is the transmission source of the registration request packet.
From the terminal I63 connected to the node device IV12 to the terminal V
It is registered in the terminal connection table 73 of III70.

Subsequently, the terminal I63, which is a newly registered terminal connected to the node device I9, sets the value of the relay count display field 1 of the header to "4" as described above, and creates eight registration request packets. ,Send.

These eight registration request packets are relayed by the node device II10, the node device III11 and the node device IV12 in the same manner as described above, and received by the terminal VIII70 from the eight terminals I63 connected to the node device I9. At this time, the terminal II64 connected to the node device I9
In the terminal VIII70, the terminal I63 is registered in the terminal connection table 73. At this time, the value of the number of relays is from the number "4" of node devices connected to the network system to the value "4" in the initial setting value column 5 of the relay number display column.
Since the value obtained by subtracting is 0, the number of node devices is set to 4.

On the other hand, the terminal I connected to the node device I9
63 is a terminal that has transmitted the registration request packet. Since this registration request packet is relayed by all the node devices on the network system and returns to its own terminal after one round, the terminal I63 terminates the transmission of the registration request packet when receiving the registration request packet.

Thereafter, the terminal I63, which is a newly registered terminal connected to the node device I9, sets the value of the relay number display field 1 of the header to "1" and the value of the used wavelength designation field 2 to "1". The transfer request packet in which the identification number of the terminal I63 is written is created in the newly registered terminal identification field 7 and transmitted.

This transfer request packet is sent to the node device I9.
I63 connected to the node device II10 adjacent to
The packet processing unit 72 reads the packet type identification field 3 of the header, and the value indicating the transfer request packet is set in this field, so that the transfer process of the terminal connection table 73 is performed. In the packet processing unit 72,
The terminal connection table 73 is searched using the value of the newly registered terminal identification field 7 of the data part of the packet, the value of the relay number display field 1 of the header is set to "3", and the value of the used wavelength designation field is set to ". 1 ”is set, a packet (transfer packet) in which the terminal connection table 73 is written in the data part is created, and is transmitted to the terminal I63 connected to the node device I9.

The transfer packet is received by the terminal I63 connected to the node device I9, and this table is used as the terminal connection table 73. At this time, this table is changed to one centering on the terminal I63 connected to the node device I9, and information of the terminal I63 connected to the node device II10 (terminal identification number, number of relays, reception wavelength) is also added. It is stored as the terminal connection table 73. At this time, the terminal transmitting the transfer request packet
Although not limited to the terminal I63 connected to the node device II10 adjacent to the node device I9, this terminal is selected as the closest one.

The above is shown in the operation flowcharts of FIGS. 3 and 4.

(Embodiment 2) FIG. 5 is an operation flowchart of the terminal which is the transmission source of the registration request packet in the second embodiment of the present invention.

FIG. 6 is an operation flowchart of the terminal which receives the registration request packet in the second embodiment of the present invention.

In the second embodiment, the transmission source terminal of the registration request packet sets the value of the relay number display column 1 to "1" and the value of the used wavelength designation column 2 from "1" to "8". As a result, the registration request packet is transmitted only to the terminal connected to the downstream adjacent node device. The terminal receiving the registration request packet is the terminal connection table 7 as in the first embodiment.
Register to 3. Further, the terminal having the same reception wavelength as the transmission source terminal of the registration request packet resets by adding "1" to the value of the initial setting field 5 of the relay count display field of the received registration request packet. Similarly, the packet is transmitted only to the terminal connected to the downstream adjacent node device. In this way, the registration request packet is sequentially transmitted to the terminal connected to the downstream adjacent node device by the terminal having the same reception wavelength as the transmission source terminal of the registration request packet. When this terminal receives the registration request packet, the transmission of the registration request packet is completed, and thereafter, the transfer request packet is transmitted in the same manner as in the first embodiment.

The above is shown in the operation flowcharts of FIGS. 5 and 6.

In this embodiment, the number of registration request packets transmitted by the terminal that is the source of the registration request packet is small, and the transmission of the registration request packet is distributed to a plurality of terminals. This has the effect of reducing the load.

(Other Embodiments) When the operation as in the above embodiment is performed, if the registration request packet transmitted by the self terminal is received before all the registration request packets to be transmitted have been transmitted (the number of nodes). (This is especially likely to happen when the number of wavelengths is small or the number of wavelengths is small), and at that point the transmission of the registration request packet ends, and the registration request packet cannot be transmitted even to the destination to which the registration request packet should be transmitted ( Especially, the other end connected to the node device to which the registration request end is not connected). Therefore, in the registration request terminal, if the registration request packet sent to each node device at the wavelength (λl in the first embodiment) that the self terminal can receive is sent after the registration request packet sent at another wavelength. Good. For example, in the first embodiment, when the registration request terminal outputs the registration request packet in which the relay number column is fixed to a certain value and the used wavelength designation column is sequentially changed, the used wavelength designation column is changed to 2 → 3 → 4. → 5 → 6 → 7 → 8 → 1 may be set so that 1 is the last wavelength that can be received by the registration requesting terminal. The same applies to the second embodiment. However, in the second embodiment, when there are two or more node devices, the registration requesting terminal is not limited to the terminal relaying the packet relayed by another terminal (as long as it can process and send the packet). Since it is to be received as a registration request packet to be transmitted, it is necessary to specify to the relaying terminal which wavelength the registration requesting terminal can receive. Alternatively, if it is decided that a terminal that receives the same wavelength as the wavelength that the registration request terminal receives is used as the relay terminal, this need is eliminated.

In the above embodiment, the node device relays the packet between the registration request terminal and each node device for broadcasting. In the node device to which the registration-requested terminal serving as the destination is connected, the value in the relay count column is set so that the packet in which the information indicating the relay count is “0” is received. However, an appropriate value can be used for this, and even if the number of relays is set by considering the node device to which the registered request terminal is connected as a node device that relays to the destination registered request terminal. No problem.

In the above embodiment, the terminals are connected to each node device from the sub transmission line through the sub transmission line.
However, not only the terminal is connected to the sub transmission path mentioned here, but also another network may be connected. Further, the above embodiment does not limit the connection form of the terminal to the node device in the present invention at all, and is not limited to the terminal connected to the node device through the sub transmission line, and the signal provided in the node device. The present invention can be applied to a case where communication is performed between the node devices by using the transmission / reception unit of as a terminal.

Further, in each of the above embodiments, an example in which a plurality of channels are configured with different wavelengths has been described, but the invention of the present application is not limited thereto, and the transmission channel is not limited to the wavelength multiplexing as in the above embodiments. As for the electric signal, various ones such as frequency multiplexing and spatial multiplexing in which a plurality of transmission lines are bundled can be used. Further, the term “multiplexing” used here is logical, and it is not necessary to physically multiplex a plurality of channels in one transmission line or bundle the transmission lines, and use, for example, space as a transmission line. It is also possible to obtain a plurality of channels by wavelength multiplexing or the like.

[0060]

As described above, in the connection information (terminal, etc.) registration method according to the present invention, since the registration request packet is transmitted to all terminals via the network system, the input / output unit of the terminals is There is an effect that it is possible to perform simple and error-free registration by eliminating the need for manual registration used.

Furthermore, the fact that the registration request packet is transmitted to all terminals is detected by the fact that the registration request packet transmitted from the self terminal is transmitted to the self terminal, so that it is sent to all terminals of the registration request packet. Has the effect of easily detecting the completion of the transmission.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a registration request packet according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the structure of a transfer request packet according to the first embodiment of this invention.

FIG. 3 is a diagram showing the operation of the terminal that is the transmission source of the registration request packet according to the first embodiment of this invention.

FIG. 4 is a diagram showing an operation of a terminal which receives a registration request packet according to the first embodiment of the present invention.

FIG. 5 is a diagram showing the operation of the terminal that is the transmission source of the registration request packet according to the second embodiment of the present invention.

FIG. 6 is a diagram showing an operation of a terminal which receives a registration request packet according to the second embodiment of the present invention.

FIG. 7 is a diagram showing an example of a multi-hop network system.

FIG. 8 is a diagram of a configuration example of a node device used in an example of a multi-hop type network system.

FIG. 9 is a diagram of a configuration example of a terminal used in an example of a multi-hop network system.

FIG. 10 is a diagram showing a configuration example of a packet used in an example of a multi-hop type network system.

FIG. 11 is a diagram showing a configuration example of a separation / insertion unit of a node device used in an example of a multi-hop type network system.

FIG. 12 is a diagram showing a configuration example of a buffer of a node device used in an example of a multi-hop type network system.

[Explanation of symbols]

 1 Relay number display column 2 Used wavelength designation column 3 Packet type identification column 5 Initial setting value column of relay count display column 6 New registration terminal reception wavelength column 7 New registration terminal identification column 9-12 Node device 17 Control unit 22-29 Fixed Wavelength receiver 30-37 Separation / insertion unit 38-45 Buffer 46-53 Variable wavelength transmitter 55-62 Sub transmission line 63-70 Terminal 78 Comparator 79, 87-88 Latch 80 I / F unit 81, 86 Demultiplexer 82 Insertion Control unit 83-84 FIFO 85, 92 Selector 89 Down counter 90 Shift register 91 Write address counter 93 Read address counter 94 Dual port memory

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04L 12/46 H04L 11/00 330 12/28 12/42

Claims (14)

[Claims] 1. A network system of a terminal to be connected in a network system comprising a plurality of node devices to which a terminal is connected and a transmission line in which a plurality of channels are multiplexed and a packet is transmitted between the node devices. F is a connection information registration method for registering the connection information in another terminal, the registration requesting terminal requesting registration of the connection information of the own terminal to the other terminal, identification information for identifying the own terminal, A connection information registration method, characterized in that a registration request packet added with connection node information indicating a node device to which the self terminal is connected is transmitted to each registered terminal. 2. When the registration requesting terminal is a terminal capable of receiving only a channel received by a part of channels received by a node device to which the terminal connects,
The connection information registration method according to claim 1, wherein the registration request terminal further adds reception channel information indicating a channel that can be received by the terminal itself to the registration request packet. 3. A method of transmitting the registration request packet to each registered request terminal, wherein the registration request terminal is a first node device in which the registration request packet sent by the terminal is a node device to which the terminal is connected. Via the, sequentially transmitting a registration request packet so that the node device next to the first node device, which is the target node device in this process, receives all the channels received by the target node device. In the first step and the second step, the node device next to the target node device in the process before performing this process is set as the target node device in this process, and the target node device in the process The registration request terminal or the registration request packet transmission terminal specified in the previous step of this step sequentially makes registration requests so that all the channels received by the node device of A second step of transmitting a packet, and after the first step, the second step is repeated until the registration request terminal receives the registration request packet transmitted by the own terminal. The connection information registration method according to any one of 1 and 2. 4. The registration request terminal is a terminal capable of receiving only a channel received by one of the channels received by a node device to which the terminal is connected, and each registration request packet receives each registration request packet. The method of transmitting to the terminal is such that the registration request terminal sends the registration request packet sent by the terminal to the target node device in this process via the first node device which is the node device to which the terminal is connected. A first step and a second step of sequentially transmitting registration request packets so that the target node device receives the channels on all channels received by the target node device after the first node device; The node device next to the target node device in the process before this process is set as the target node device in this process, and the target node device in the process target node device is So as to be received by all channels received by the registration request terminal, or the registration request packet transmitting terminal designated in the previous step of this step, sequentially sending out registration request packets, After the first step, the second step is repeated until the registration request terminal receives the registration request packet sent by the own terminal. In each step of the first and second steps, the purpose is When the registration request packet is received by the node device, the registration request terminal, or a step before each step, so that the registration request packet transmitted by the channel that the registration request terminal can receive is received last. 3. The connection information registration method according to claim 2, wherein the registration request packet transmitting terminal designated in 1) sequentially transmits the registration request packets. 5. A registration request terminal, or a registration request packet transmission terminal specified in a step before each step, sends out a registration request packet to be transmitted so that a target node device receives the registration request packet on a desired channel. 5. The registration request packet according to claim 1, wherein information indicating a target node device and information designating a channel to which the node device before the target node device transmits the registration request packet are added. The connection information registration method described. 6. The information indicating the target node device is information indicating the number of times the registration request packet is relayed.
The connection information registration method described. 7. A node device that relays a registration request packet, when relaying a registration request packet, performs an operation on information indicating the number of times the registration request packet is relayed, and indicates the number of times the registration request packet is relayed. 7. The connection information registration method according to claim 6, wherein the information is rewritten to indicate the number of times the relay is received after that. 8. The registration request terminal, or the registration request packet transmitting terminal specified in the previous step of each step, includes at least one of the registration request packets to be transmitted in each step, and the registration request packet in the next step. The connection information registration method according to any one of claims 3 to 7, wherein information designating a registration request packet transmitting terminal that transmits the connection information is added. 9. The connection information registration according to claim 1, wherein the registration request terminal has at least one of the registration request terminals transfer the connection information of each terminal in the network system. Method. 10. The connection information registration method according to claim 1, wherein the channels are based on light, and the plurality of channels are based on a plurality of lights having different wavelengths. 11. A network system of terminals to be connected in a network system comprising a plurality of node devices to which terminals are connected and a transmission line in which a plurality of channels are multiplexed, and a packet is transmitted between the node devices. 2. When registering the connection information of F to another terminal, the method according to claim 1 or 2.
A network system using the method described in any one of 0. 12. The network system according to claim 11, wherein the node device is capable of transmitting the packets respectively received on the plurality of channels, on desired channels. 13. The network system according to claim 11, wherein the node device has means for outputting a packet to be output to a connected terminal among the received packets to the terminal. . 14. A packet to which a node device has added information designating the number of times of relaying is used as a packet to be transmitted, and when the node device relays the packet, information indicating the number of times of relaying the packet is used. 14. The network according to claim 10, wherein the information indicating the number of times the packet is relayed is rewritten to indicate the number of times the relay is received after that. system.