JP2853330B2 - Packet route identification information transfer system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a number for identifying a plurality of packet routes (a bundle of a plurality of packet communication channels) that can be set for each optical fiber between adjacent nodes of a high-speed packet communication network. That is, a packet for transferring identification information of a packet route between communication units having respective communication functions in the high-speed packet communication network, such as between nodes, between units within a node, between a node and an operation center, and the like. The present invention relates to a route identification information transfer system.

The high-speed packet communication network to which the present invention is applied is as follows.

That is, a logical packet communication path from a packet sender to a receiver is generally set via a plurality of nodes in a network, and a packet path accommodating a plurality of such packet communication paths is provided between each node. (Or, in another expression, also referred to as exchange unit routes). Generally, a physical transmission path (for example, an optical fiber) between nodes accommodates a plurality of packet paths as described above. A plurality of packet routes are identified by an identification number, and a node existing on a route of a packet has a cross-connect device for connecting a plurality of incoming packet routes of the node to a corresponding outgoing packet route. I have. Which incoming packet route is to be connected to which outgoing packet route is given as routing information to each node device in advance by an operation system that manages a high-speed packet communication network. Further, each packet is provided with an area for displaying an identification number (identification information of the packet path) for identifying the packet path while being transmitted through each packet path. In the above-described cross-connect device in each node, the data is rewritten according to the conversion table provided in the cross-connect device. Therefore, each node needs to recognize what packet routes are set for the incoming packet route and the outgoing packet route, and what the identification number is.

2. Description of the Related Art In general, the number of packet routes set for each optical fiber between adjacent nodes in a high-speed packet communication network can be very large, so that the identification number of the packet route can take a very large number of values. And therefore
The data amount when transferring the identification information of these packet routes becomes very large. Therefore, a technique for efficiently transmitting the identification information of the packet route has conventionally been desired.

As the identification information (number), for example, 4096 packet routes from 0 to 4095 can be set in association with each link. The transfer of the packet route identification information is performed, for example, by transferring which packet route identification information is newly set between nodes to an adjacent node. Conventionally, when information indicating whether a failure has occurred in a packet route) or when forwarding failure information of a packet route detected in an interface unit in a node to a controller in the same node, the transfer is conventionally required. It has been considered to transfer the identification information of the packet route as it is. Therefore, a 12-bit information amount is required to transfer the identification information of each packet path, and a maximum information amount of 12 × 4096 bits is used.

However, if the identification information of each packet route that needs to be transferred is transferred as it is as in the past, a 12-bit information amount is required to transfer the identification information of each packet route, and a maximum of 12 × 4096 bits Will be transferred. Therefore, there is a problem that the amount of information to be transferred becomes very large.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide an identification information transfer system for a packet route having a small amount of information to be transferred.

According to the first aspect of the present invention, a plurality of packet route identification information, which can be set for each link between adjacent nodes in a high-speed packet communication network, has a communication function in the high-speed packet communication network. In a packet route identification information transfer system for transferring a packet from a first communication unit to a second communication unit, the packet is transferred on a transmitting side of the first communication unit facing the second communication unit. Packet route identification information generating means for generating packet route identification information to be provided;
Bitmap conversion means for converting the identification information of the packet route into bitmap data in which each bit address corresponds to the identification information of the packet route; and identification of a packet route to which the converted bitmap data is transferred. Bitmap information receiving means for receiving identification information data of a packet route in a bitmap format on a receiving side of the second communication unit facing the first communication unit; Valid bit detecting means for detecting a valid bit in the identification information data of the packet route in the bit map format, and a packet included in the data in the bit map format based on the position (address) of the valid bit. Identification information detecting means for recognizing route identification information. Beam is provided.

According to the second aspect of the present invention, a plurality of sets of packet route identification information which can be set for each link between adjacent nodes in the high-speed packet communication network and can be set for each communication in the high-speed packet communication network In a packet route identification information transfer system for transferring from a first communication unit having a function to a second communication unit, in a transmission side of the first communication unit facing the second communication unit, Identification information generating means for generating identification information of a packet path to be transferred, and, among identification information of the packet path to be transferred, a head identification information detecting means for detecting a leading value by the ordering; Final identification information detecting means for detecting a final value among identification information of a packet route to be transferred;
Bitmap conversion means for converting the identification information of the packet route at least in a range from the first value to the last value into bitmap data in which each bit address corresponds to the identification information of the packet route; , A final value, and a bitmap / head / final identification information transfer unit for transferring data between the start value and the end value of the bitmap data. On the receiving side opposed to the first communication unit, a bitmap information receiving means for receiving a start value and an end value of the identification information of the packet route and bitmap data of the identification information of the packet route. And valid bit detecting means for detecting a valid bit in the identification information data of the packet format in the bitmap format; and the first value and the last value. Identification means for recognizing the position (address) of the valid bit based on the information and identifying the identification information of the packet path included in the bitmap format data. An information transfer system is provided.

According to the third aspect of the present invention, one of the adjacent node devices in the high-speed packet communication network determines identification information of one or more packet routes newly set with the other node device. In the packet route identification information transfer system for transferring the set packet route identification information to the other node device, the identification information can be ordered, and the one node device is
Search and newly set the output route identification information table including the identification information of the empty packet route of the output route from the one node device to the other node device, and the output route identification information table. Empty identification information detecting means for detecting the identification information of an empty packet route capable of being used, and newly identifying identification information of a required number of packet routes from among the identification information of the detected empty packet routes. Identification information determining means to be set; identification information of the first order among the identification information of the newly set packet route; and leading identification information / number of transfer of the number of pieces of identification information of the newly set packet route. Request identification information number transfer means, wherein the other node device includes an input route table including identification information of an empty packet route of an input route from the one node device to the other node device. Receiving the first identification information / request identification information for receiving the identification information of the first order among the identification information of the newly set packet routes in the adjacent node and the number of the identification information of the newly set packet routes. Means for retrieving the newly entered packet identification information from the identification information of the packet path starting from the first identification information among the identification information of the empty packet paths in the table. A packet route identification information transfer system, comprising: identification information table searching means for determining the identification information of the packet routes of the number of the route identification information as the identification information of the newly set packet route. Provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a basic configuration on a transmitting side according to a first embodiment of the present invention. FIG. 2 is a diagram showing a basic configuration on a receiving side according to the first embodiment of the present invention. FIG. 4 is a diagram showing a basic configuration on a transmitting side according to a second embodiment of the present invention. FIG. 4 is a diagram showing a basic configuration on a receiving side according to the second embodiment of the present invention. FIG. 5 is a third embodiment of the present invention. FIG. 6 is a diagram showing a basic configuration on the receiving side according to the third embodiment of the present invention. FIG. 7 is a diagram showing a status of notification of identification information of a packet route at the time of a path failure. FIG. 8 is a diagram showing a format for transferring packet route identification information in the first embodiment of the present invention. FIG. 9 is a diagram showing transfer of packet route identification information in the second embodiment of the present invention. FIG. 10 shows the format of one of two adjacent nodes. FIG. 11 is a diagram showing correspondence between the outgoing route identification information of the node and the use status of the incoming route identification information of the other node. FIG. 11 shows a procedure for setting a new packet route in the situation of FIG. FIG. 12, FIG. 12 is a flowchart of the procedure of FIG. 11, FIG. 13 is a diagram showing a configuration example of a node device in the embodiment of the present invention, FIG. 14 is a diagram showing a configuration of the reception interface 32 of FIG. FIG. 15 is a diagram showing a configuration example of the identification information transfer unit in FIG. 14, and a diagram showing the example.

BEST MODE FOR CARRYING OUT THE INVENTION Basic Configuration of First Embodiment of the Present Invention (FIGS. 1 and 2) FIG. 1 is a diagram showing a basic configuration on a transmitting side according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes identification information generation means, 2 denotes a bitmap conversion means, and 3 denotes a bitmap identification information transfer means.

The identification information generating means 1 generates identification information of a packet route to be transferred.

The bitmap conversion means 2 converts the above-described packet route identification information into bitmap data in which the address of each bit corresponds to the packet route identification information.

The identification information transfer means 3 transfers the converted bitmap data.

FIG. 2 is a diagram showing a basic configuration on the receiving side according to the first embodiment of the present invention. In FIG. 2, 4 is a bitmap information receiving means, 5 is a valid bit detecting means, and 6 is an identification information detecting means.

The bitmap information receiving means 4 receives the identification information data of the packet route in the bitmap format.

The valid bit detection means 5 detects valid bits in the identification information data in the bitmap format.

The identification information detecting means 6 recognizes the identification information of the packet path included in the bitmap format data based on the valid bit positions (addresses).

According to the first aspect of the present invention, on the transmitting side, the identification information of the packet route to be transferred generated by the identification information generating means 1 is converted by the bitmap converting means 2
After the address of each bit is converted into bitmap data corresponding to the identification information of the packet path, the address is transferred by the identification information transfer means 3.

On the receiving side, the transferred bitmap format packet route identification information data is received by the bitmap information receiving means 4, and the bitmap format packet route identification information data is transmitted by the valid bit detection means 5. Are detected, and the identification information detecting means 6 recognizes the identification information of the packet route included in the data in the bitmap format on the basis of the position (address) of the effective bit. I do.

Basic Configuration of Second Embodiment of the Present Invention (FIGS. 3 and 4) FIG. 3 is a diagram showing a basic configuration on the transmitting side according to a second embodiment of the present invention. In FIG. 3, reference numeral 7 denotes identification information generation means, 8 denotes head identification information detection means, 9 denotes bitmap conversion means, 10 denotes last identification information detection means, and 11 denotes bitmap / head / final identification information transfer means. .

The identification information generating means 7 generates identification information of a packet route to be transferred which can be ordered.

The head identification information detecting means 8 detects the head value of the identification information of the packet route to be transferred.

The final identification information detecting means 10 detects the final value of the identification information of the packet route to be transferred.

The bitmap conversion means 9 converts the identification information of the packet route at least in the range from the start value to the end value into bitmap data in which each bit address corresponds to the identification information of the packet route. .

The bitmap / head / final identification information transfer means 11 transfers the head value, the end value, and the data between the head value and the end value among the bitmap data.

FIG. 4 is a diagram showing a basic configuration on the receiving side according to the second embodiment of the present invention. In FIG. 4, 12 is a bitmap information receiving means, 13 is a valid bit detecting means, and 14 is an identification information detecting means.

The bitmap information receiving means 12 receives the first value and the last value of the identification information of the packet route, and the data in the bitmap format of the identification information of the packet route.

The valid bit detecting means 13 detects valid bits in the identification information data of the packet route in the bitmap format.

The identification information detecting means 14 recognizes the position (address) of the valid bit based on the start value and the end value, and recognizes the identification information of the packet path included in the data in the bitmap format. .

According to the second aspect of the present invention, on the transmitting side, the identification information of the packet route to be transferred, which is generated by the identification information generating means 7, is transmitted by the head identification information detecting means 8 and the final identification information detecting means 10. The start value and the end value are respectively detected, and the bitmap conversion means 9 at least identifies the packet route identification information in the range from the start value to the end value, and sets the address of each bit to the packet route. Is converted into bitmap data corresponding to the identification information of Then, the final identification information detecting means 10 transfers the head value, the final value, and the data between the head value and the final value among the bitmap data.

On the receiving side, the bitmap information receiving means 12 receives the start value and the last value of the identification information of the packet route and the data in the bitmap format of the identification information of the packet route, and Thus, valid bits in the identification information data of the packet route in the bitmap format are detected. And identification information detecting means
By 14, the valid bit position (address) is recognized based on the start value and the end value, and the identification information of the packet path included in the bitmap format data is recognized.

Basic Configuration of Third Embodiment of the Present Invention (FIGS. 5 and 6) FIG. 5 is a diagram showing a basic configuration on the transmitting side according to a third embodiment of the present invention. According to a third aspect of the present invention, in one of adjacent nodes, identification information of one or more packet routes is newly set, and the set identification information of the packet route is transferred to the other node. 1 shows the configuration of the transmitting side. In the third embodiment of the present invention, the identification information can be sequenced, and the transmitting node includes an identification information table of the outgoing packet route including the identification information of the empty packet route of the egress route; It is assumed that there is an incoming route table including identification information of an empty packet route of a receiving node's incoming route. In FIG. 5, reference numeral 15 denotes empty identification information detection means, 16 is identification information determination means, and 17 is identification information / request identification information number transfer means for the head packet route.

The vacant identification information detecting means 15 searches the above-mentioned transmission packet identification information table at the transmitting side node to detect the identification information of a vacant packet route that can be newly set. .

The identification information determining means 16 newly sets identification information of a required number of packet routes from among the identification information of the detected empty packet routes.

The head identification information / request identification information number transfer means 17 includes, among the identification information of the newly set packet route, the identification information of the first packet route in the order, and the identification information of the newly set packet route. Transfer the number of identification information.

FIG. 6 is a diagram showing a basic configuration on the receiving side according to the third embodiment of the present invention. In FIG. 6, reference numeral 18 denotes a head identification information / request identification information number receiving means, 19 denotes an identification information table search means, and 20 denotes an identification information determination means.

The first identification information / request identification information number receiving means 18 includes, among the identification information of the packet routes newly set in the adjacent nodes, the identification information of the first packet route in the order and the packet information of the newly set bucket route. Receive the number of road identification information.

The identification information table searching means 19 searches the identification information table of the incoming packet route provided in the receiving node, and among the identification information of the empty packet routes in the table, the first packet route The identification information of the packet routes of the number of the newly set packet routes is determined as the identification information of the newly set packet routes from the identification information of the packet routes beginning with the identification information of the packet route.

According to the third embodiment of the present invention, on the transmitting side, the empty packet identification information detecting means 15 generates the outgoing packet route identification information table including the empty packet route identification information of the outgoing route of the transmitting node. The identification information of the vacant packet route that can be searched and newly set is detected, and the identification information determining means 16 determines the required number of packets from the identification information of the vacant packet route detected. The route identification information is newly set. Then, the head identification information / request identification information number transfer means 17 outputs the identification information of the packet path in the first order among the identification information of the newly set packet path, and the identification information of the newly set packet path. Transfer the number of road identification information.

On the receiving side, the head identification information / request identification information number receiving means 18 uses the identification information of the packet route whose order is the first among the identification information of the packet routes newly set in the adjacent node, and the above-mentioned new identification information. The number of pieces of identification information of the packet path set in the receiving node is received, and the identification information table searching means 19 searches the identification information table of the incoming packet path provided in the above-mentioned receiving side node, and finds an empty packet in the table. Of the identification information of the routes, the identification information of the packet routes of the number of the identification information of the newly set packet routes from the identification information of the packet routes beginning with the identification information of the leading packet route, It is determined as the identification information of the newly set packet route.

Embodiment (FIGS. 7 to 15) FIG. 7 is a diagram showing an example of a status of notification of identification information of a packet route at the time of a path failure.

When a failure occurs in the packet route from the node B to the node A, the node A detects the failure and notifies the operation system managing the high-speed packet communication network of which packet route has failed. Need to be notified. In general, it is conceivable that the number of packet routes in which a failure has occurred becomes very large. At this time, according to the first embodiment of the present invention, for example, as shown in FIG. 8, the maintenance packet to be transmitted to the operation system is 4096 pieces each corresponding to identification information = 0 to 4095. Includes bitmap data consisting of bits. Here, the bit of “1” indicates that a failure has occurred in the identification information of the corresponding packet route. By doing so, as described above, the transfer data amount can be greatly reduced as compared with the conventional case requiring a maximum of 12 × 4096 bits.

Further, according to the second embodiment of the present invention, the maintenance packet transmitted to the operation system may include data as shown in FIG. That is, in the example of FIG. 9, the minimum value of the identification information of the packet route in which the failure has been detected in the node A is “0008”, and the maximum value is “0045”. After that, the state of the packet route identification information from the packet route identification information = 0008 to the packet route identification information = 0045 is shown in a bitmap format.

Further, as described above, the application of transferring the identification information of one or more packet routes to other parts in the high-speed packet communication network is not limited to the notification of the identification information of the packet route at the time of the path failure as described above. Not limited to the case, for example, when one or more packet routes are newly set between one node and another adjacent node, a packet route to be set from one node to another node The case of notifying a set of identification information may be used. Also in this case, the same format as in FIGS. 8 and 9 can be used.

When a new packet route or a plurality of packet routes are set between one node and another adjacent node,
The third embodiment of the present invention is more advantageous when one node notifies another node of a set of packet route identification information to be set.

FIG. 10 is a diagram showing the correspondence between the identification information of the outgoing packet route of one node and the use status of the identification information of the incoming packet route of the other node in two adjacent nodes. In this way, the identification information tables a and b of the packet routes on the transmitting side and the receiving side of each packet route hold the same information indicating whether the packet route is used or empty. I have.

FIG. 11 shows, in accordance with the third embodiment of the present invention, in the situation of FIG.
FIG. 11 is a diagram illustrating an example of a procedure for newly setting a packet route. FIG. 12 shows a general flowchart of this procedure. In the following, FIGS. 10 and 11
Will be described in association with the steps in FIG.

For example, if the node A needs to set four new packet routes with the node B, the node A
The identification information of the vacant packet route in the outgoing packet route identification information table a of the ten nodes is searched. Then, when attention is paid only to the vacant state, identification information of four consecutive packet routes, "0001", "0002", "0004",
And, “0006” is determined as identification information of four newly set packet routes. Then, as shown by α in FIG. 11, the identification information table of the outgoing packet route of the own node is updated. That is, the identification information of the four newly set packet routes is also set to the “used” state. (Step 62) Next, as shown by γ in FIG.
A message including the number “4” of the newly set identification information of the four packet routes and the value “0001” of the head (start point) of the identification information of these packet routes is generated and transmitted to the node B. Forward. (Step 63) The node B receives the above message, and (Step 64) refers to the inbound route identification information table (b in FIG. 10) of its own node B corresponding to the node A, and The value (0001) of the head (start point) of the identification information of the received packet route,
Also, based on the number of packet route identification information “4”, the identification information of four newly set packet routes is “0001”,
It recognizes that these are "0002", "0004", and "0006". Then, the incoming route identification information table (b in FIG. 10)
The above identification information of these four packet routes is set to the “used” state. (Β in FIG. 11, step 65) FIG. 13 shows the node device in the embodiment of the present invention,
It is a figure showing the example of composition of a cross connect device. In FIG. 13, 30 is a cross-connect device, 31 is a controller, 32
Is a reception interface, 33 is an identification information conversion unit, 34 is a switch unit, 35 is a cross-connect unit, and 36 is a transmission interface.

The above-described packet route identification information table and the like are included in the identification information conversion unit 33 in FIG. 13, and the procedure as shown in FIG.

FIG. 14 shows a configuration related to the failure notification function of the receiving interface 32 of FIG. As shown in FIG. 14, the reception interface 32 includes a reception unit 41 having a function of receiving a signal transmitted on the transmission path 40, a failure detection data generation unit 42, and an identification information transfer unit 43. .
Although not shown, the receiving unit 41 has a failure detection function such as a known signal loss detection circuit, and outputs an alarm signal to the failure detection data generation unit 42 when a failure is detected. The failure detection data generating unit 42 includes, for example, an encoder, and generates identification information of the packet path as failure data in accordance with which packet path the alarm signal is output as, and at the same time, It outputs an identification information transfer request for the failed packet route to the identification information transfer unit 43.

FIG. 15 is a diagram illustrating a configuration example of the identification information transfer unit 43 in FIG. In FIG. 15, reference numeral 51 denotes a CPU, 52 denotes a RAM, 53 denotes a ROM, and 54 denotes an identification information map generation / transmission unit. The data of the identification information of the failed packet route from the failure detection data generation unit 42 is written into the RAM 52, while the request for transferring the identification information of the failed packet route is given to the CPU 51. CPU
When receiving the request to transfer the identification information of the failed packet route, the 51 according to the identification information map creation program stored in the ROM 53, generates the address corresponding to the identification information data of the failed packet route in the RAM 52, and generates the identification information map. Sending section
Supply 54. The identification information map generation / transmission unit 54
Each bit corresponds to all the packet routes that can be accommodated by the 13 receiving interfaces 32 (not shown).
An M bitmap area is provided, and the bit corresponding to the above address is 1 and the other bits are 0.
Thus, the data of the identification information of the failed packet route is converted into bitmap data. This bitmap data is transferred from the identification information map generation / transmission unit 54 to the controller 31 in FIG. In this way, even in the same node device, the transfer of the packet route identification information data from the reception interface 32 to the controller 31 is performed by converting the data into bitmap data, so that the transfer time of the cross-connect device to the controller 31 is reduced. Be shortened.

Although not shown, on the side receiving the above bitmap data, the received bitmap data is temporarily expanded on the RAM, and the contents of each bit are scanned by completely reversing the operation of the configuration of FIG. , “1” bit address, and the identification information of the packet route corresponding to the address may be obtained.

The above conversion from the packet route identification information into bitmap data and vice versa are performed in exactly the same way in the case of transfer between nodes. In that case, the above control is performed by the controller 31 in FIG.

As described above, according to the packet route identification information transfer system of the present invention, the amount of information to be transferred can be reduced.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takafumi Nakajo 1015 Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-3-19546 (JP, A) JP-A-2-2- 76435 (JP, A) JP-A-64-16041 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04L 12/00-12/66 H04L 23/00-23/02 H04J 3/00-3/26 H04N 1/00-1/46

Claims (9)

(57) [Claims] An identification information of an exchange unit route which can be set plural for each link between adjacent nodes in a communication network is transmitted to a first unit having a communication function in the communication network.
In the identification information transfer system of the exchange unit path for transferring from the communication unit to the second communication unit, the transmission side of the first communication unit facing the second communication unit is transferred. Switching unit path identification information generating means for generating identification information of a power unit unit path; bitmap data in which each bit address corresponds to the identification information of the switching unit path; Bitmap conversion means for converting the converted bitmap data, and identification information transfer means for an exchange unit path for transferring the converted bitmap data, wherein the second communication unit is opposed to the first communication unit. On the receiving side, a bitmap information receiving means for receiving identification information data of the exchange unit route in the bitmap format, Valid bit detecting means for detecting a valid bit in the identification information data of the exchange unit path; and identifying the exchange unit path included in the data in the bitmap format based on the position (address) of the valid bit. An identification information transfer system for an exchange unit route, comprising identification information detection means for recognizing information. 2. The communication network according to claim 1, further comprising: a plurality of switching unit routes which can be set for each link between adjacent nodes in the communication network. In a communication unit having a function of transferring to another communication unit, an identification information generating means for generating identification information of an exchange unit route to be transferred, and an address of each bit exchanging the identification information of the exchange unit route. A communication unit comprising: a bitmap conversion unit that converts bitmap data corresponding to identification information of a unit route; and an identification information transfer unit that transfers the converted bitmap data. 3. The communication network according to claim 1, wherein said plurality of identification information of switching unit routes which can be set for each link between adjacent nodes in said communication network have a communication function. In a communication unit transferred from another communication unit, a bitmap information receiving means for receiving identification information data of an exchange unit route in a bitmap format in which each bit address corresponds to identification information of the exchange unit route, Valid bit detecting means for detecting a valid bit in the identification information data of the exchange unit route in the bitmap format; and an exchange unit included in the bitmap format data based on the position (address) of the valid bit. A communication unit comprising: identification information detecting means for recognizing identification information of a route. 4. A plurality of identification information of switching unit routes which can be set for each link between adjacent nodes in a communication network and are arranged from a first communication unit having a communication function in the communication network. In an identification information transfer system for an exchange unit route for transferring to a second communication unit, a transmission unit of the first communication unit which is opposite to the second communication unit is to be transferred. Identification information generating means for generating path identification information; head identification information detecting means for detecting a leading value by the ordering among the identification information of the exchange unit paths to be transferred; and the exchange unit to be transferred. Final identification information detecting means for detecting a final value of the identification information of the route; and at least the exchange unit route in a range from the first value to the last value. Bitmap conversion means for converting the identification information into bitmap data in which the address of each bit corresponds to the identification information of the exchange unit path; and the head value, the end value, and the head value among the bitmap data. And a bitmap / head / final identification information transfer unit for transferring data between the first communication unit and the second communication unit. Bitmap information receiving means for receiving a start value and an end value of route identification information and bitmap data of the exchange unit route identification information; and identification information of the bitmap format exchange unit route. Valid bit detecting means for detecting a valid bit in the data; recognizing a position (address) of the valid bit based on the start value and the end value; Identification information transfer system exchange unit route, characterized in that it comprises a recognizing identification information detecting means identification information of the replacement unit routes including bitmap data. 5. The communication network according to claim 1, wherein a plurality of identification information of the switching unit routes which can be set for each link between adjacent nodes in the communication network are communicated in the communication network. In a communication unit having a function of transferring to another communication unit having a function, identification information generating means for generating identification information of an exchange unit route to be transferred; and identification information of the exchange unit route to be transferred. Among them, a head identification information detecting means for detecting a head value, a final identification information detecting means for detecting a final value among the identification information of the exchange unit routes to be transferred, and at least, from the head value to the final value. Bitmap conversion for converting the identification information of the exchange unit path into bitmap data in which the address of each bit corresponds to the identification information of the exchange unit path in the range of Means, and a bitmap / head / final identification information transfer means for transferring data between the start value and the end value among the start value, the end value, and the bitmap data. Communication unit. 6. A communication network, wherein a plurality of identification information of switching unit routes which can be set and arranged for each link between adjacent nodes in the communication network are communicated in the communication network. In the communication unit transferred from another communication unit having a function, the first value, the last value, and the address of each bit of the identification information of the exchange unit route correspond to the exchange unit route corresponding to the identification information of the exchange unit route. Bitmap information receiving means for receiving bitmap format data of path identification information; valid bit detection means for detecting valid bits in the bitmap format exchange unit path identification information data; Based on the value and the final value, the position (address) of the valid bit is recognized, and the identification information of the exchange unit path included in the bitmap format data is recognized. Communication unit, characterized in that it comprises a recognizing identification information detecting means. 7. One of the adjacent node devices in the communication network determines identification information of one or more switching unit routes newly set with the other node device, and determines the set switching unit route. In an identification information transfer system for an exchange unit path for transferring identification information of a route to the other node device, the identification information can be ordered, and the one node device is configured to transmit the identification information from the one node device to the other node device. A departure route identification information table including identification information of a vacant exchange unit route of the departure route toward the other node device; and A vacant identification information detecting means for detecting identification information of an exchange unit path, and newly setting identification information of a necessary number of exchange unit paths from the detected identification information of the vacant exchange unit path. Separate information determining means; and, among the identification information of the newly set exchange unit path, the identification information in the first order, and the head identification information / number of the identification information of the newly set exchange unit path. Request identification information number transfer means, wherein the other node device includes input route identification information including identification information of a vacant exchange unit route of an incoming route from the one node device to the other node device. The table and, among the identification information of the switching unit routes newly set in the adjacent node, the identification information having the leading order, and the head identification information for receiving the number of the identification information of the newly set switching unit routes. Request identification information number receiving means, searching the incoming path identification information table, and among the identification information of the vacant exchange unit paths in the table, from the identification information of the exchange unit path beginning with the leading identification information, Previous Identification information table searching means for determining identification information of switching unit routes of the number of newly set switching unit routes as identification information of newly set switching unit routes. Switching unit route identification information transfer system. 8. A node device in a communication network, wherein the node device newly sets identification information of one or more exchange unit routes and transmits the set identification information of the exchange unit route to another node. An identification information transfer function of the exchange unit route for transferring to the device, the identification information can be sequenced, and an empty exchange unit route of an outgoing route from the node device to the other node device is provided. An outgoing route identification information table including identification information; and an empty identification information detecting unit that searches the outgoing route identification information table to detect identification information of an empty exchange unit route that can be newly set. Identification information determining means for newly setting identification information of a required number of exchange unit routes from among the identification information of the detected empty exchange unit routes; and identification of the newly set exchange unit routes. Order of information There head identification information, and the node device characterized by having a head identification information / request identification information the number of transfer means for transferring the number of the newly set identification information of the exchange unit route. 9. A node device in a communication network, wherein the identification information is orderable, and an input route identification information table including identification information of an empty exchange unit route of an input route from another node device; Head identification information / request identification for receiving the identification information of the first order among the identification information of the newly set switching unit routes in the another node and the number of identification information of the newly set switching unit routes. Information receiving means, searching the incoming path identification information table, and among the identification information of the vacant exchange unit paths in the table, the new information is obtained from the identification information of the exchange unit path starting with the head identification information. Identification information table searching means for determining the identification information of the exchange unit routes of the number of the identification information of the exchange unit routes set as the identification information of the newly set exchange unit routes. Node device to be.