CN100433702C - Packet communication method - Google Patents

Packet communication method Download PDF

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Publication number
CN100433702C
CN100433702C CNB2004800011547A CN200480001154A CN100433702C CN 100433702 C CN100433702 C CN 100433702C CN B2004800011547 A CNB2004800011547 A CN B2004800011547A CN 200480001154 A CN200480001154 A CN 200480001154A CN 100433702 C CN100433702 C CN 100433702C
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connection
transmission
node
connects
packet
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CN1701578A (en
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松井健一
八木毅
成濑勇一
村山纯一
金田昌树
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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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Abstract

When a lower layer address pair of a transferred lower layer frame is counted a predetermined number of times or more, a packet transfer apparatus (2) sends the lower layer address pair to a frame transfer apparatus (3). The frame transfer apparatus (3) counts the transfer frequency of the lower layer frame having the lower layer address pair.

Description

Block communication method
Technical field
The present invention relates to a kind of traffic engineering technology, be used for distributing route according to traffic needs.
Background technology
Usually, in the grouping conveying network system, the transmitted frequency of the frame that is transmitted between count transmitted source packet transfer device and the destination packet transfer device, and according to transmitted frequency distribution route.Utilize this traffic engineering technology, improve the traffic carrying capacity load-carrying efficiency.In traditional traffic engineering technology, in order to reduce transmission load on the packet transfer device and path management load and to improve the delivery quality of network, by the frame transfer device counting frame transmitted frequency that links to each other with all packet transfer devices, and, redistribute the route between the packet transfer device according to the traffic load of frame transfer device.Utilize the method, packet transfer device can distribute traffic load, and need not to monitor the frame transmitted frequency.Frame transfer device has form, has wherein write down the address between all packet transfer devices, so that count the frame transmitted frequency between all packet transfer devices.Clauses and subclauses in the form are provided with (for example, after a while with the list of references 1,2,3,4 and 5 that is described) by the operator temporarily.
Traditionally, it is known that construction logic does not have the technology that connects grouping conveying network, and wherein router uses as comprises that the IP that the photonic network etc. of wavelength path multilink and wavelength path switching node is connected on the network exchanges grouping.For conveys traffic in the network that forms by this technology, need carry out the route of the connection that connects network and not have not being connected the flow distribution that grouping conveying network arrives connection.
First prior art of carrying out this route and flow distribution is GMPLS (broad sense multiprotocol label switching) (for example a, list of references 6 and 7).For route among the GMPLS and flow distribution, at first, the link road that for good and all determine to connect network by.Afterwards, calculate nothing and connect the flow distribution of grouping conveying network determined connection.
Second prior art carrying out this route and flow distribution is bit-level supernet (for example, list of references 1 and 2) too.For route and the flow distribution in the current too bit-level supernet that proposes, the link road that calculates the connection network simultaneously is by not being connected the flow distribution (for example, list of references 4,5 and 8 after a while with described) of grouping conveying network to connecting with having.
Traditionally, it is known that construction logic does not have the technology that connects grouping conveying network, and wherein router uses as comprises that the IP that the photonic network etc. of wavelength path multilink and wavelength path switching node is connected on the network exchanges grouping.For conveys traffic in the network that forms by this technology, the wavelength path with the connection that connects network must be set.
This prior art is a bit-level supernet too.Too the bit-level supernet comprises: PE (Provider Edge) router connects too bit-level supernet and external network; Electricity P (supplier) router connects PE by IPv6 (IPv 6) layer; And light P (supplier) router, connect pe router and electric P router by wavelength layer.Connection setting in the current too bit-level supernet that proposes divides into groups to carry out (list of references 1 and 2) by the wavelength path that passes through the light P router between pe router, electric P router and the pe router being set and making each router be transmitted in the IPv6 that flows on the wavelength path.In addition, also utilize a plurality of service request, the wavelength path (list of references 8) that does not pass through electric P router is set between pe router.Figure 30 shows the too block diagram of the structure of bit-level supernet of tradition.With reference to Figure 30, reference number 701 expression pe routers; The electric P router of 702 expressions; 703 expression light P routers; And 704 external network of linking to each other with pe router 701 of expression.
Below, will be described above-mentioned list of references.
[list of references 1] Junichi Murayama, Takeshi Yagi, TakahiroTsujimoto, Toshiyuki Sakurai, Kenichi Matsui, Junichi Sumimoto, MasakiKaneda, Kazuhiro Matsuda and Hiroshi Ishii, " Development of Tera-bitSuper Network (TSN) Technologies ", IEICE General Conference, 2003, B-7-81, in March, 2003
[list of references 2] Junichi Murayama, Takahiro Tsujimoto, KenichiMatsui, Kazuhiro Matsuda and Hiroshi Ishii, " Traffic-Driven Optical IPNetworking Architecture ", IEICE Transactions on Communications, Vol.E86-B, No.8,2294-2301 page or leaf, in August, 2003
[list of references 3] Takahiro Tsujimoto, Takeshi Yagi, JunichiMurayama, Kazuhiro Matsuda and HiroshiIshii, " Evaluation of opticalCut-Through Schemes in TSN ", IEICE General Conference, 2003, B-7-82, in March, 2003
[list of references 4] Kenichi Matsui, Toshiyuki Sakurai, MasakiKaneda, Junichi Murayama and HiroshiIshii, " A Study of Multi-LayerTraffic Engineering for Tera-bit Super Network ", IEICE Technical Report, NS2002-316, IN2002-289,297-302 page or leaf, in March, 2003
[list of references 5] Matsui, Sakurai, Kaneda, Murayama and Ishii, " AMulti-layer Traffic Engineering Architecture for the Electronic/OpticalHybrid Network ", Communications, Computers and Signal Processing, 2003.PACRIM.2003IEEE Pacific Rim Conference on Publication, Vol.1, the 293-296 page or leaf, in August, 2003
People such as [list of references 6] E.Rosen, " Multiprotocol Label SwitchingArchitecture ", RFC3031, Internet Engineering Task Force:IETF, January calendar year 2001
[list of references 7] E.Mannie, " Generalized Multi-Protocol LabelSwitching (GMPLS) Architecture ", Internet Engineering Task Force:IETF, Internet Draft, draft-irft-ccamp-gmpls-architecture-07.txt, in May, 2003
[list of references 8] Kenichi Matsui, Toshiyuki Sakurai, MasakiKaneda, Junichi Murayama and Hiroshi Ishii, " Design of Cut-throughOptical Path Allocation Scheme for TSN ", IEICE General Conference, 2003, B-7-84, in March, 2003
Summary of the invention
But, in traditional grouping conveying network system, between all packet transfer devices, carry out counting.For this reason, the address entry of all packet transfer devices must be added in the form of frame transfer device.Entry number must be the twice of the number of the packet transfer device that will measure.When network size increased, the entry number of the form of frame transfer device also increased, and had caused the increase of the routing management load of frame transfer device.When the routing management load of frame transfer device increased, the processing speed of traffic engineering descended, and the transmission traffic overload of frame transfer device.As a result, the conveying function of frame transfer device descends.
In first kind of technology carrying out route and flow distribution, for good and all determine to connect the route of network, then, calculate the combination of not having the stream that connects grouping conveying network.Even when calculating has effective nothing as broadband and high priority and is connected the combination of stream of grouping conveying network, if transport stream combination connection required, that do not have between the connection packet communicate terminal does not appear in the route of forever having determined that connects network, then connection can not be set.Therefore, can not use network effectively.
The current link road that proposes at second kind of technology carrying out route and flow distribution by with flow allocation method in, in order not realize connecting the link road of network by distribute, calculate simultaneously the route that connects network to be connected the stream combination of grouping conveying network with nothing with efficient resource according to there being the required bandwidth of connection grouping conveying network.Therefore, can effectively utilize Internet resources.But if calculate link road simultaneously by making up with stream, along with network size becomes big, the number of combinations of route and stream increases sharp.Therefore, owing to increase computing time also explosively, can not in the time of practicality, calculate the route in the actual used network size.
In bit-level supernet too, pe router is connected by the superiors with electric P router and links to each other.The IPv6 of all pe routers grouping focuses on electric P router in from the pe router to the network, or the IPv6 grouping by electric P router is when focusing on special-purpose electric P router, may take place congestedly in electric P router, and communication quality may be degenerated.Therefore, in conventional method, utilize incision (cut-through), have the pe router of more traffic carrying capacity request by the direct connection of light path, and do not insert electric P router.This light path will be known as the incision light path.But when network size became big, the quantity of the connecting interface that is kept by pe router was more much smaller than the quantity that is arranged on the pe router in the network.Therefore, can not connect pe router by the incision light path with more traffic carrying capacity request.
Design the present invention solves the problems referred to above, and the objective of the invention is to propose a kind of block communication method that can increase the efficient of traffic engineering.
Another object of the present invention is to propose a kind of block communication method, it can be according to there not being traffic carrying capacity bandwidth and the priority that connects grouping conveying network, in the short period of practicality, calculate and be provided with the route that is connected network simultaneously and do not have the best stream that is connected grouping conveying network and make up, so that according to do not have to connect the required bandwidth of grouping conveying network, carry out the link road that connects network by with real network in efficient resource distribute.
Another object of the present invention is to propose a kind of block communication method, increases the quantity of the incision light path that can be provided with in the network.
According to the present invention, a kind of block communication method has been proposed, utilization links to each other with network and transmits a plurality of packet transfer devices that comprise the lower-level frame that encapsulates upper-layer packet, lower-level frame is carried out at least one frame transfer device of intermediary by the transmission of network between packet transfer device, with link to each other with frame transfer device with packet transfer device and control the network comtrol server of the communicate by letter route of lower-level frame in network by send instruction to packet transfer device and frame transfer device, wherein said packet transfer device comprises: the extraction process, and the lower-layer addresses that extracts the transmission sources address that comprises low layer and destination-address from received lower-level frame is right; First registration process is registered in the transmission destination of received lower-level frame in first form at each corresponding target way address; The first counter process, at each right type of lower-layer addresses, the right quantity of lower-layer addresses that counting is extracted by the extraction process; And the first transmission process, the lower-layer addresses of being counted by the first counter process to described frame transfer device transmission expression is to surpassing the first information of predetermined threshold in the given time; Described frame transfer device comprises: second registration process is registered in the transmission destination of received lower-level frame in second form that is included in each destination-address in the lower-level frame; The second counter process, at each the right type of lower-layer addresses that is included in from the first information that described packet transfer device receives, the quantity of the lower-level frame that counting is transmitted; And the second transmission process, the lower-layer addresses of being counted by the second counter process to described network comtrol server transmission expression is to surpassing second information of predetermined threshold in the given time; And described network comtrol server comprises: calculation procedure, when receiving second information, from second information, extract transmission sources address and destination-address, and carry out to calculate, with the communication route in the optimum network, between transmission sources address and the destination-address; And the change process, according to result of calculation, change the registration of the transmission destination that is registered in the lower-level frame in first form and second form.
In block communication method of the present invention, described packet transfer device comprises: the extraction process, and the lower-layer addresses that extracts the transmission sources address that comprises low layer and destination-address from received lower-level frame is right; The counter process, at each right type of lower-layer addresses, the right quantity of lower-layer addresses that counting is extracted by the extraction process; And the transmission process, the lower-layer addresses of being counted by the counter process to frame transfer device transmission expression is to surpassing the first information of predetermined threshold in the given time.
In block communication method of the present invention, to the frame transfer device transmission first information time, the right transmission sources address transfer of the lower-layer addresses of transmission process in being included in the first information be included in frame information in destination-address and with the relevant information of the corresponding upper strata of destination-address destination-address.
In block communication method of the present invention, described frame transfer device comprises: the counter process, and at each right type of the lower-layer addresses of indicating it to count by packet transfer device, the quantity of the lower-level frame that counting is transmitted; And the transmission process, the lower-layer addresses of being counted by the counter process to network comtrol server transmission expression is to surpassing second information of predetermined threshold in the given time.
In block communication method of the present invention, described frame transfer device also comprises the counting treatment progress, according to counting, deletes the right clauses and subclauses of any lower-layer addresses that its count value does not increase in the given time.
In block communication method of the present invention, described network comtrol server comprises: calculation procedure, when receiving second information of expression any transmission sources address and destination-address from frame transfer device, carry out to calculate, with the communication route in the optimum network, between transmission sources address and the destination-address; And the change process, issuing command with according to result of calculation, becomes packet transfer device and the frame transfer device that is included between transmission sources address and the destination-address with the transmission destination of lower-level frame.
According to the present invention, a kind of block communication method has also been proposed, by being connected packet communicate terminal with the nothing that is used as packet transfer device, adding to as the termination function unit in the connection network connectionless packet transfer node as frame transfer device, connect in the grouping conveying network and be structured in the nothing that comprises on transmission link with connection multiplexing transfer function and the connection network in logic with the connection switching node that is connected function of exchange, when carrying out when being connected arrangement according to the traffic carrying capacity bandwidth that do not have to connect grouping conveying network and traffic carrying capacity priority, comprise: notification process, record comprises by the transmission packets source address that do not have to connect institute's transmission in the packet communicate terminal and destination-address the bandwidth of defined each stream and the statistical information of priority, and the statistical information that is write down is notified to traffic carrying capacity control appliance as network comtrol server; And stream list creating process, make the traffic carrying capacity control appliance according to not connecting the statistical information that packet communicate terminal sends over from having, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address, priority and bandwidth at each stream.
Block communication method of the present invention also comprises: stream list ordering process, sort according to the descending convection current tabulation of priority, according to the descending of bandwidth to having the line ordering that flows to of equal priority; And the connection candidate list is created process, the transmission sources of supposing each stream in being registered in the stream tabulation of sorting does not have the packet communicate terminal of connection and destination and does not have between the packet communicate terminal of connection and be provided with connection, begin the connection order of candidates is distributed to all streams by uppermost stream from the stream tabulation, create the connection candidate list.
In block communication method of the present invention, described connection candidate list is created process not to be had and connects packet communicate terminal, identical destination and do not have one the flow distribution of being no less than that connects packet communicate terminal and equal priority and give the identical candidate that is connected by having the identical traffic source, and the summation that makes bandwidth is no more than the capacity that connects the candidate, and determine to be connected candidate's priority and bandwidth according to the summation of the priority of the stream that is distributed and bandwidth, create and connect candidate list.
Block communication method of the present invention also comprises: connect candidate list ordering process, sort to connecting candidate list according to the descending of priority, according to the descending of bandwidth the connection candidate with equal priority is sorted; And the reservation process, uppermost connection candidate begins from the connection candidate list that sorts, keeps the connecting interface that does not have the connection packet communicate terminal for being included in all the connection order of candidates that connect in the candidate list that sort.
Block communication method of the present invention also comprises: the selection process, according to by connecting the candidate list ordering connection candidate list that process sorted, from wherein register the connection solution tabulation that the connection that will be provided with is arranged, select the connection that need not to be provided with; Process relatively, having sorted connects in the candidate list, for its reservation is that possible connection candidate is set to the connection candidate as processing target, and will compare with bandwidth and selected the connection as the connection candidate's of processing target priority; Connect solution list creating/renewal process, when as the connection candidate's of processing target priority with bandwidth during greater than selected priority that is connected and bandwidth, from connect candidate list, get rid of connection candidate as processing target, and the connection candidate as processing target added to connect in the solution tabulation, and from connect the solution tabulation, get rid of selected connection, and selected connection is added in the connection candidate list; And forbidding connects the tabulation registration process, when the priority as the connection candidate of processing target is not more than selected priority that is connected and bandwidth with bandwidth, to be registered in forbidding as the connection candidate of processing target and connect in the tabulation, wherein said relatively process is among the possible connection candidate, unregisteredly connects uppermost connection candidate in the tabulation at forbidding and be set to connection candidate as processing target for its reservation.
Block communication method of the present invention also comprises: the selection process, according to by connecting the candidate list ordering connection candidate list that process sorted, from wherein register the connection solution tabulation that the connection that will be provided with is arranged, select the connection that need not to be provided with; Process relatively, having sorted connects in the candidate list, for its reservation is that possible connection candidate is set to the connection candidate as processing target, and will compare with bandwidth and selected the connection as the connection candidate's of processing target priority; Connect solution list creating/renewal process, when as the connection candidate's of processing target priority with bandwidth during greater than selected priority that is connected and bandwidth, from connect candidate list, get rid of connection candidate as processing target, and the connection candidate as processing target added to connect in the solution tabulation, and from connect the solution tabulation, get rid of selected connection, and selected connection is added in the connection candidate list; Forbidding connects the tabulation registration process, will be recorded in forbidding with the current execution number of times that compares process as the connection candidate of processing target and connect in the tabulation; And forbidding connects the tabulation deletion process, connect deletion the tabulation with being not less than the connection candidate that the execution number of times of predetermined number writes down for a short time than the current execution number of times of process frequently from forbidding, wherein said relatively process is among the possible connection candidate, unregisteredly connects uppermost connection candidate in the tabulation at forbidding and be set to connection candidate as processing target for its reservation.
Block communication method of the present invention also comprises: the route calculation procedure, and uppermost connection is calculated route when transmission sources does not have the packet communicate terminal of connection and destination and do not have between the packet communicate terminal of connection in connecting the solution tabulation; Connect the process that is provided with, in the time can guaranteeing to transmit the required transfer resource of uppermost connection in the transmission link on the route of being calculated, the function of exchange of control connection switching node, so that uppermost connection to be set, the transmission sources of control flows does not have the connection packet communicate terminal, utilizing described connection transmission to distribute to the stream of uppermost connection, and from connect the solution tabulation, get rid of uppermost connection; And connection solution tabulation deletion process, in the time can not guaranteeing transfer resource, from connect the solution tabulation, get rid of uppermost connection, and uppermost connection is added in the connection candidate list.
In block communication method of the present invention, when connecting the solution tabulation for sky, when can not be when being registered in any connection candidate who connects in the candidate list and keeping connecting interface, perhaps when not finishing to comprise stream list ordering process when being registered in any connection that connects in the solution tabulation and guaranteeing transfer resource, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, the route calculation procedure, connect a series of processes process is set and is connected solution tabulation deletion process and comprise the list ordering process that flows, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, forbidding connects the tabulation deletion process, the route calculation procedure, connect the process that is provided with and one of a series of processes that are connected solution tabulation deletion process.
Block communication method of the present invention also comprises: reporting interval is provided with process, make the reporting interval that the traffic carrying capacity control appliance is provided with does not have the statistical information that connects packet communicate terminal, wherein said notification process is according to the statistical information of each stream of the received grouping of set reporting interval record, and statistical information is notified to the traffic carrying capacity control appliance, and stream list creating process is upgraded the stream tabulation according to not connecting the statistical information that packet communicate terminal sends over from having.
Block communication method of the present invention also comprises: threshold value is provided with process, make the traffic carrying capacity control appliance that the threshold value of the bandwidth of not having each stream that connects packet communicate terminal is set, wherein notification process writes down the statistical information of each stream of received grouping, and when the bandwidth of the stream that is write down surpasses set threshold value, the statistical information that its bandwidth is surpassed the stream of threshold value is notified to the traffic carrying capacity control appliance, and stream list creating process is upgraded the stream tabulation according to not connecting the statistical information that packet communicate terminal sends over from having.
Block communication method of the present invention also comprises: adding to as the termination function unit in the connection network by the connectionless packet transfer node as frame transfer device is connected packet communicate terminal with the nothing that is used as packet transfer device, connect in the grouping conveying network and be structured in the nothing that comprises on transmission link with connection multiplexing transfer function and the connection network in logic with the connection switching node that is connected function of exchange, when will be when do not have connecting between the packet communicate terminal executive communication, transmission node is selected process, selection is arranged in connectionless packet transfer node and receives the destination of dividing into groups the connection switching node that does not have between the connection packet communicate terminal and counts the connectionless packet transfer node of minimum, as connection target is set; First connects process is set, and makes the control appliance control connection switching node as network comtrol server, does not have the packet communicate terminal of connection and connects as first between the connectionless packet transfer node that target is set so that transmission transmission packets source to be set; And second connect process be set, and makes control appliance control connection switching node, do not have and connect second between the packet communicate terminal and connect to be provided as connectionless packet transfer node that target is set and destination.
Block communication method of the present invention also comprises: transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, utilizes first to connect, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination; And transmit process is set, make control appliance control as the connectionless packet transfer node that target is set, connect to transmit not have to second and connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination from transmission sources.
Block communication method of the present invention also comprises: first transmission node is selected process, selection is arranged in connectionless packet transfer node and transmits the transmission packets source connection switching node that does not have between the connection packet communicate terminal and counts the connectionless packet transfer node of minimum, connects as first target is set; Second transmission node is selected process, and the connection switching node of selecting to be arranged in connectionless packet transfer node and receive the destination of dividing into groups not have between the connection packet communicate terminal is counted the connectionless packet transfer node of minimum, connects as second target is set; First connects the process that is provided with, make the control appliance control connection switching node as network comtrol server, the connectionless packet transfer node of target is set and first between the connectionless packet transfer node of target is set and connect as second to be provided as first; Second connects process is set, and makes control appliance control connection switching node, does not have to connect packet communicate terminal and as first second between the connectionless packet transfer node of target is set and connects so that transmission sources to be set; And the 3rd connect process be set, and makes control appliance control connection switching node, do not have the 3rd connection that connects between the packet communicate terminal to be provided as second connectionless packet transfer node and the destination that target is set.
Block communication method of the present invention also comprises: transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, utilizes second to connect, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination; First transmits process is set, and makes control appliance control as first connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to first to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; And second transmit process be set, and makes control appliance control as second connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 3rd to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination.
Block communication method of the present invention also comprises: first transmission node is selected process, selects transmission transmission packets source not have the connectionless packet transfer node that connects in the affiliated first area of packet communicate terminal, connects as first target is set; Second transmission node is selected process, and the destination of selective reception grouping does not have the connectionless packet transfer node that connects in the described second area of packet communicate terminal, connects as second target is set; The 3rd transmission node is selected process, selects to be arranged in connectionless packet transfer node and transmission sources and does not have the connection switching node that connects between the packet communicate terminal and count the connectionless packet transfer node of minimum, connects as the 3rd target is set; The 4th transmission node is selected process, selects to be arranged in connectionless packet transfer node and destination and does not have the connection switching node that connects between the packet communicate terminal and count the connectionless packet transfer node of minimum, connects as the 4th target is set; First connects the process that is provided with, make the control appliance control connection switching node as network comtrol server, the connectionless packet transfer node of target is set and first between the connectionless packet transfer node of target is set and connect as second to be provided as first; Second connects process is set, and makes control appliance control connection switching node, does not have to connect packet communicate terminal and as the 3rd second between the connectionless packet transfer node of target is set and connects so that transmission sources to be set; The 3rd connects process is set, and makes control appliance control connection switching node, the connectionless packet transfer node of target is set and as first the 3rd connection that is provided with between the connectionless packet transfer node of target to be provided with as the 3rd; The 4th connection is provided with process, makes control appliance control connection switching node, does not have the 4th connection that connects between the packet communicate terminal to be provided as the 4th connectionless packet transfer node and the destination that target is set; And the 5th connect process be set, and makes control appliance control connection switching node, the connectionless packet transfer node of target is set and as the 4th the 5th connection that is provided with between the connectionless packet transfer node of target to be provided as second.
Block communication method of the present invention also comprises: transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, utilizes second to connect, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination; First transmits process is set, and makes control appliance control as the 3rd connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 3rd to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; Second transmits process is set, and makes control appliance control as first connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to first to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; The 3rd transmits process is set, and makes control appliance control as second connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 5th to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; And the 4th transmit process be set, and makes control appliance control as the 4th connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 4th to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination.
In block communication method of the present invention, be arranged in the first area, as the 3rd connectionless packet transfer node that target is set with link to each other with being connected by a plurality of connectionless packet transfer nodes that are arranged in the first area as first connectionless packet transfer node that target is set; And be arranged in second area, as the 4th connectionless packet transfer node that target is set with link to each other with being connected by a plurality of connectionless packet transfer nodes that are arranged in second area as second connectionless packet transfer node that target is set.
Block communication method of the present invention also comprises: notification process, record is by the transmission packets source address of institute's transmission in the connectionless packet transfer node and the destination-address bandwidth to defined each stream, as statistical information, and the statistical information that is write down is notified to control appliance; And stream list creating process, make control appliance according to the statistical information that sends over from connectionless packet transfer node, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address and bandwidth at each stream, wherein when in connection is set, when the summation that detects the bandwidth by stream by stream tabulation surpasses the connectionless packet transfer node of predetermined threshold, the connection without connectionless packet transfer node is set.
According to the present invention, in the packet transfer device, have and count pre-determined number or the more right lower-level frame of lower-layer addresses, in frame transfer device, count transmitted frequency.Therefore, the quantity that the lower-layer addresses that can monitor is right suppresses for minimum and necessary.As a result, can improve traffic engineering efficient.
According to the present invention, do not have the statistical information that each nothing that connects in the grouping conveying network connects the packet communicate terminal recorded stream, and it is notified to the traffic carrying capacity control appliance.Traffic carrying capacity control appliance notice is also integrated the information that is sent, to create the stream tabulation.Utilize this structure, can grasp the state that whole nothing connects the stream in the grouping conveying network effectively.The result, do not have when logic and to connect grouping conveying network and be structured in when connecting on the network, this traffic engineering can be finished effectively connection route calculation and setting in the connection network in the short period of practicality, with the required bandwidth of the connection grouping conveying network of storage nothing effectively.Therefore, can increase the transmission capacity of the nothing connection grouping conveying network of actual scale economically.
Order storage flow tabulation according to priority.Then, according to the order of bandwidth, sort at each priority.Begin order assignment from the uppermost bandwidth of tabulating and connect the candidate, connect candidate list thereby create.Therefore, can in maximization priority and two numerical value of bandwidth, carry out at the flow distribution that connects.
To have the identical traffic source do not have connect packet communicate terminal, identical destination does not have the one or more flow distribution that connect packet communicate terminal and equal priority and gives the identical candidate that is connected, and makes the summation of bandwidth be no more than the capacity that connects the candidate.Therefore, can reduce the route that connects network is connected grouping conveying network with nothing number of combinations.
At first, sort to connecting candidate list according to the descending of priority, and at each priority, sort to connecting the candidate according to the descending of bandwidth.From uppermost connection candidate, connect the candidate at all, order is carried out there not being the reservation of the connecting interface that connects packet communicate terminal.Can will be that possible, uppermost connection candidate regards the connection solution that will be provided with as for its reservation.Therefore, can in maximization priority and two numerical value of bandwidth, determine to connect solution.
The connection that selection need not to be provided with from wherein register the connection solution tabulation that the connection that will be provided with is arranged, for its reservation is that possible connection candidate is set to the connection candidate as processing target, and will compare with bandwidth and selected the connection as the connection candidate's of processing target priority.When as the connection candidate's of processing target priority with bandwidth during greater than selected priority that is connected and bandwidth, from connect candidate list, get rid of connection candidate as processing target, and it is added to connect in the solution tabulation, and from connect the solution tabulation, get rid of selected connection, and it is added in the connection candidate list.Therefore, can in the combination that changes a plurality of connection solutions, find out the most effective connection solution by repeat assessment.In assessment, do not assess simultaneously link road by.Compare with second kind of prior art, can reduce route that connects network and the number of combinations of not having the stream that is connected grouping conveying network, and can reduce amount of calculation.When using forbidding to connect tabulation, can prevent from once more the connection candidate who assessed once to be assessed.Therefore, can avoid the assessment that is connected the candidate that its priority and bandwidth are not improved.The possibility that obtains best connection solution by less amount of calculation can be improved, and amount of calculation can be reduced.That is, can realize the calculating of the best of breed that connects and the minimizing of amount of calculation.
To be recorded in forbidding with the current execution number of times that compares process as the connection candidate of processing target connects in the tabulation.Connect deletion the tabulation with frequently than the little predetermined number of current execution number of times of process or more carry out the connection candidate that number of times writes down from forbidding.Utilize this structure, can connect the tabulation deletion from forbidding and be recorded in forbidding more over and done with connection candidate of times after connecting in the tabulation, and it is set to the connection candidate as processing target once more at it.In addition and since from forbidding connect deletion the tabulation with frequently than the little predetermined number of current execution number of times of process or more carry out the connection candidate that number of times writes down, can suppress to forbid the increase that connects list size.
Described method also comprises: the route calculation procedure, and uppermost connection is calculated route when transmission sources does not have the packet communicate terminal of connection and destination and do not have between the packet communicate terminal of connection in connecting the solution tabulation; Connect the process that is provided with, in the time can guaranteeing to transmit the required transfer resource of uppermost connection in the transmission link on the route of being calculated, the function of exchange of control connection switching node, so that uppermost connection to be set, the transmission sources of control flows does not have the connection packet communicate terminal, utilizing described connection transmission to distribute to the stream of uppermost connection, and from connect the solution tabulation, get rid of uppermost connection; And connection solution tabulation deletion process, in the time can not guaranteeing transfer resource, from connect the solution tabulation, get rid of uppermost connection, and uppermost connection is added in the connection candidate list.Calculate route, only be provided with at giving the best connection that connects the combination priority level.For remaining connection, uncertain solution, and the definite route of part are with calculating optimum combination once more.Owing to this reason, can avoid first kind of prior art, can not effectively use network because determine whole routes immediately and the problem of the connection that can transmit best flow distribution can not be set.
The traffic carrying capacity control appliance is provided with the reporting interval that does not have the statistical information that connects packet communicate terminal, thereby suitably controls reporting interval.Utilize this structure, by suppressed traffic amount control appliance with do not have the load be connected on the packet communicate terminal in, follow the moderate change in the service bandwidth, can keep the optimum network utilization ratio.
The traffic carrying capacity control appliance is provided with the threshold value of the bandwidth of not having each stream that connects packet communicate terminal.When traffic carrying capacity sharply changes, send statistical information immediately, and irrelevant with reporting interval.Therefore, by following the rapid variation in the service bandwidth, can keep the optimum network utilization ratio.
According to the present invention, the connection switching node of selecting to be arranged in connectionless packet transfer node and receive the destination of dividing into groups not have between the connection packet communicate terminal is counted the connectionless packet transfer node of minimum, as connection target is set.Utilize this structure, can increase can be by the connecting interface number of incision path use.As a result, can increase the incision number of path.Therefore, unless can avoid being provided with the incision path otherwise grouping will be by its connectionless packet transfer node congested.In the present invention, immediately there be not the nothing connection packet communicate terminal number increase that connects grouping conveying network, and be installed in the connecting interface number that do not have to connect in the packet communicate terminal hour, still the set quantity that prevents the congested incision light path of connectionless packet transfer node can be increased, and the congested of connectionless packet transfer node can be avoided.Therefore, can improve the communication quality that extensive nothing connects grouping conveying network economically, and can increase the transmission capacity economically.
Selection is arranged in connectionless packet transfer node and transmits the transmission packets source connection switching node that does not have between the connection packet communicate terminal and counts the connectionless packet transfer node of minimum, connects as first target is set.Selection is arranged in connectionless packet transfer node and receives the destination of dividing into groups the connection switching node that does not have between the connection packet communicate terminal and counts the connectionless packet transfer node of minimum, connects as second target is set.The present invention can be applied to its scale and not become big network along with there being the increase that connects the packet communicate terminal number, does not increase although each has the connecting interface number that connects packet communicate terminal.Since will the most close transmission sources do not have the connectionless packet transfer node that connects packet communicate terminal and the most close destination do not have the connectionless packet transfer node that is connected packet communicate terminal be used as set, without the two ends in the incision path of any other connectionless packet transfer node, can increase can be by the connecting interface number of cutting the path use.As a result, can increase the incision number of path.Therefore, unless can avoid being provided with the incision path otherwise grouping will be by its connectionless packet transfer node congested.
Select transmission transmission packets source not have the connectionless packet transfer node that connects in the affiliated first area of packet communicate terminal, target is set as first connection.The destination of selective reception grouping does not have the connectionless packet transfer node that connects in the described second area of packet communicate terminal, connects as second target is set.Selection is arranged in connectionless packet transfer node and transmission sources not to be had the connection switching node that connects between the packet communicate terminal and counts the connectionless packet transfer node of minimum, connects as the 3rd target is set.Selection is arranged in connectionless packet transfer node and destination not to be had the connection switching node that connects between the packet communicate terminal and counts the connectionless packet transfer node of minimum, connects as the 4th target is set.The present invention can be applied to its scale and not become big network along with there being the increase that connects the packet communicate terminal number, does not increase although each has the connecting interface number that connects packet communicate terminal.That is, cellular logic is divided into the zone that comprises nothing connection packet communicate terminal and connectionless packet transfer node.In each zone, carry out after the route, the incision path is set between the connectionless packet transfer node in each zone.Therefore, can a plurality of incisions path be set, and can increase the connecting interface number that can use by the incision path interregional.As a result, can increase the incision number of path, unless can avoid being provided with the incision path otherwise grouping will be by its connectionless packet transfer node congested.
Record is by the transmission packets source address of institute's transmission in the connectionless packet transfer node and the destination-address bandwidth to defined each stream, as statistical information.The statistical information that is write down is notified to control appliance.Control appliance is created the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address, priority and bandwidth at each stream according to the statistical information that sends over from connectionless packet transfer node.When being provided with in the connection, when the summation that detects the bandwidth by stream by the stream tabulation surpasses the connectionless packet transfer node of predetermined threshold, the connection without connectionless packet transfer node is set.Utilize this structure, connection can be set, thereby, avoid congested on one's own initiative according to the traffic carrying capacity state.As a result, can further improve the congested effect of avoiding connectionless packet transfer node.
Description of drawings
Fig. 1 shows the view according to the structure of the packet communication network system of first embodiment of the invention;
Fig. 2 shows the block diagram according to the structure of the packet transfer device of first embodiment of the invention;
Fig. 3 shows the block diagram according to the structure of the frame transfer device of first embodiment of the invention;
Fig. 4 shows the block diagram according to the structure of the network comtrol server of first embodiment of the invention;
Fig. 5 shows the view according to the detailed example of the packet communication network system of first embodiment of the invention;
Fig. 6 shows the view according to the detailed example of transmitting 23a of first embodiment of the invention;
Fig. 7 shows according to first embodiment of the invention, is arranged on the view by the detailed example of the form among the classified counting processing unit 28a;
Fig. 8 shows the view according to the detailed example of the monitoring form 34a of first embodiment of the invention;
Fig. 9 shows the block diagram according to the structure of the packet transfer route of the network model of second embodiment of the invention;
Figure 10 shows the block diagram according to the structure of the traffic carrying capacity control of the network model of second embodiment of the invention;
Figure 11 shows the block diagram according to the structure of the traffic carrying capacity control appliance of second embodiment of the invention;
Figure 12 shows the flow chart according to the traffic carrying capacity control method of second embodiment of the invention;
Figure 13 shows the form according to the example of the IPv6 flow statistic tabulation of second embodiment of the invention;
Figure 14 is used to explain according to second embodiment of the invention, to the form of the ordering of IPv6 flow statistic tabulation;
Figure 15 is used to explain the form of giving wavelength path according to second embodiment of the invention, with the IPv6 flow distribution;
Figure 16 is used to explain according to second embodiment of the invention, to the form of the ordering of wavelength path candidate list;
Figure 17 is used to explain that the wavelength path according to second embodiment of the invention is provided with the form of state;
Figure 18 shows the traffic carrying capacity control method of wherein passing through according to second embodiment of the invention, and the view of the state of wavelength path is set in network;
Figure 19 shows the flow chart according to the traffic carrying capacity control method of third embodiment of the invention;
Figure 20 shows the block diagram according to the structure of the packet transfer route of the network model of sixth embodiment of the invention;
Figure 21 shows the view of the default wavelength path of core node set in the network model shown in Figure 20;
Figure 22 shows the block diagram according to the structure of the connection setting of the network model of sixth embodiment of the invention;
Figure 23 shows the block diagram according to the structure of the traffic carrying capacity control appliance of sixth embodiment of the invention;
Figure 24 shows the view of the example that the incision light path is not set in network model shown in Figure 20;
Figure 25 shows by conventional art, and the view of the example of incision light path is set in network model shown in Figure 20;
Figure 26 shows by embodiments of the invention, and the view of the example of incision light path is set in network model shown in Figure 20;
Figure 27 shows the block diagram according to the connection setting of seventh embodiment of the invention;
Figure 28 shows the block diagram according to the connection setting of eighth embodiment of the invention;
Figure 29 shows the block diagram according to the connection setting of ninth embodiment of the invention; And
Figure 30 shows the too block diagram of the structure of bit-level supernet of tradition.
Embodiment
[first embodiment]
Below, embodiments of the present invention is described in detail with reference to the accompanying drawings.Fig. 1 shows the view according to the structure of the packet communication network system of first embodiment of the invention.
Grouping conveying network system 1 comprises: packet transfer device 2a transmits the upper-layer packet that is encapsulated in the lower-level frame to 2e; Frame transfer device 3a and 3b are as the intermediary of the transmission of the lower-level frame between the packet transfer device 2; And network comtrol server 4, control packet transfer device 2 and frame transfer device 3.Terminal 5a as user interface is contained in packet transfer device 2a to 2e in by user network 6a to 6d to 5h.Packet transfer device 2a links to each other with 3b by packet transfer device 2e or by frame transfer device 3a to 2e.
Fig. 2 shows the block diagram according to the structure of the packet transfer device of this embodiment.
Packet transfer device 2 comprises received frame processing unit 21, packet processing unit 22, transmits processing unit 23, transmission frame processing unit 24, transmission sources frame address extraction unit 25, frame transmission destination change processing unit 26, address resolution information extraction unit 27, frame transmission destination change notification unit 28 and monitoring form items for information notification unit 29.
Received frame processing unit 21 extracts upper-layer packet from received lower-level frame, and upper-layer packet is sent to packet processing unit 22.When received lower-level frame is SNMP (Simple Network Management Protocol) when request or SNMP inquiry (reference) request are set, received frame processing unit 21 sends lower-level frame to transmitting processing unit 23.
Packet processing unit 22 extracts destination-address from the upper-layer packet that is extracted by received frame processing unit 21, and destination-address sent to transmits processing unit 23.
Packet processing unit 22 also will be sent to transmission frame processing unit 24 by the upper-layer packet that received frame processing unit 21 extracts.
Transmit processing unit 23 and have as shown in Figure 6 the 23a that transmits.The upper strata destination-address of upper-layer packet and low layer destination-address and be registered in the corresponding output link of upper strata destination-address transmitted among the 23a.
Transmit processing unit 23 by search the above-mentioned 23a of transmitting detect the low layer destination-address and with the corresponding output link of upper strata destination-address that extracts by packet processing unit 22.
When received frame processing unit 21 when network comtrol server 4 receives the SNMP query requests, transmit processing unit 23 and produce the SNMP inquiry response that is used to describe the information of transmitting 23a, and the SNMP inquiry response is sent to transmission frame processing unit 24 for network comtrol server 4 as SNMP query requests transmission sources.
When request is set receiving SNMP, transmit processing unit 23 and information requested is set according to SNMP, 23a is transmitted in rewriting, and the SNMP that produces at the network comtrol server 4 that the request transmission sources is set as SNMP to 24 transmissions of transmission frame processing unit is provided with response.
Transmission frame processing unit 24 will be encapsulated in the lower-level frame by the upper-layer packet that received frame processing unit 21 extracts again, the transmission sources address setting of the lower-level frame that will be received by received frame processing unit 21 is the transmission sources address, be set to destination-address by transmitting processing unit 23 detected low layer destination-address, and to exporting lower-level frame with low layer destination-address link corresponding.
Transmission frame processing unit 24 also sends by the SNMP query requests and the SNMP that transmit processing unit 23 generations to the network comtrol server 4 as the destination request is set.
Transmission sources frame address extraction unit 25 extracts the low layer transmission sources address of the lower-level frame that is received by received frame processing unit 21, and low layer transmission sources address is sent to the frame transmission destination changes notification unit 28.
If the low layer transmission sources address that is extracted is the address of user network 6, transmission sources frame address extraction unit 25 abandons the information relevant with the frame header, does not change notification unit 28 to the frame transmission destination and sends the low layer transmission sources address that is extracted.
Receive when changing notice (being described after a while) changing notification unit 28 from the frame transmission destination of another packet transfer device 2, the frame transmission destination change processing unit 26 will be registered in transmit among the 23a, become lower floor's destination-address with the corresponding low layer destination-address of upper strata destination-address by the notice expression by the notice expression.
Address resolution information extraction unit 27 changes notification unit 28 to the frame transmission destination and sends by transmitting processing unit 23 detected low layer destination-address.
If detected low layer destination-address is the address of user network 6, address resolution information extraction unit 27 does not change notification unit 28 to the frame transmission destination and sends the low layer destination-address.
What the frame transmission destination changed that notification unit 28 comprises the form that has as shown in Figure 7 passes through classified counting processing unit 28a.
The low layer destination-address that receives from low layer transmission sources address that transmission sources frame address extraction unit 25 receives with from address resolution information extraction unit 27 by classified counting processing unit 28a counting is to the reception number of times of (lower-layer addresses to).Paired low layer transmission sources address and low layer destination-address are represented the low layer transmission sources address and the low layer destination-address that extract from the single lower-level frame that is received by received frame processing unit 21.
Be shown specifically as Fig. 7, be arranged on by the form among the classified counting processing unit 28a have with lower-layer addresses to corresponding packet counter and the timer of passing through.When each affirmation had the transmission of the right lower-level frame of suitable lower-layer addresses, counter increased progressively one.When having timer as 60 seconds initial value when becoming 0, timer is reset to 0.When reset counter, timer is reset to initial value.
Having frame transmission destination by classified counting processing unit 28a changes notification unit 28 and its counting is equal to or greater than sets in advance in the lower-layer addresses by the threshold value among the classified counting processing unit 28a being notified to monitoring form items for information notification unit 29.The frame transmission destination change notification unit 28 to the right low layer transmission sources address transfer of lower-layer addresses from transmission frame processing unit 24, with lower-layer addresses to corresponding upper strata destination-address and low layer destination-address (the frame transmission destination changes notification frame).
When receiving only from the low layer transmission sources address of transmission sources frame address extraction unit 25 and during from one of low layer destination-address of address resolution information extraction unit 27, transmission sources frame address extraction unit 25 abandons received low layer transmission sources address or low layer destination-address.
Threshold value and timer measuring time by classified counting processing unit 28a can suitably freely be set.In the present embodiment, timer is set to 60 seconds, and counting is set to 1000.
Monitoring form items for information notification unit 29 sends SNMP to default dedicated frame transfer equipment 3 request is set, add to monitor clauses and subclauses with indication, count having the number of pass times that changes the right lower-level frame of lower-layer addresses that notification unit 28 receives from the frame transmission destination.
Utilize this operation, the lower-layer addresses that packet transfer device 2 can specify its grouping transmitted frequency to be equal to or greater than threshold value is right, and notification frame transfer equipment 3.
In addition, can and the corresponding frame transfer device 3 in low layer transmission sources address and and the received corresponding frame transfer device 3 of low layer destination-address between directly transmit grouping.
Fig. 3 shows the block diagram according to the structure of the frame transfer device 3 of this embodiment.Frame transfer device 3 according to present embodiment comprises lower-layer addresses extraction unit 31, forward processing unit 32, transmission frame processing unit 33, passes through frame count processing unit 34 and external equipment connection processing unit 35.
Lower-layer addresses extraction unit 31 extracts lower-layer addresses from received lower-level frame right, i.e. low layer transmission sources address and low layer destination-address.
Forward processing unit 32 has the frame transmission table 32a of the corresponding relation that wherein records between low layer destination-address and the output link.Forward processing unit 32 detects the corresponding output link of low layer destination-address with received lower-level frame by searching frame transmission table 32a.
Transmission frame processing unit 33 is to exporting received lower-level frame by forward processing unit 32 detected output links.
Have as shown in Figure 8 monitoring form 34a by frame count processing unit 34, wherein registration has each to include the counter that is used to count the number with the right lower-level frame of predetermined lower-layer addresses and is used to be provided with the supervision clauses and subclauses of the timer of gate time.
When lower-layer addresses extraction unit 31 extract lower-layer addresses to the time, will increase progressively one to the count value of corresponding supervision clauses and subclauses with lower-layer addresses by frame count processing unit 34.
By frame count processing unit 34 also from monitoring form 34a deletion in by the scheduled time of timer measuring not to its supervision clauses and subclauses of counting, promptly the count value in the scheduled time is 0.When the count value that monitors clauses and subclauses reaches predetermined value, right to network comtrol server 4 transmission with the corresponding lower-layer addresses of supervision clauses and subclauses by frame count processing unit 34 indication external equipment connection processing unit 35.
When having timer as 60 seconds initial value when becoming 0, be 0 with counter reset.When reset counter, timer is reset to initial value.
The threshold value of the initial value sum counter of counter can suitably freely be set.
Receiving from packet transfer device 2 or network comtrol server 4 and adding or delete when monitoring the relevant instruction of clauses and subclauses, external equipment connection processing unit 35 is according to instruction, adds or the supervision clauses and subclauses of deletion by the monitoring form 34a of frame count processing unit 34.When receiving the instruction relevant with the clauses and subclauses of interpolation or delete frame transmission table 32a from network comtrol server 4, external equipment connection processing unit 35 adds or delete frame transmits the clauses and subclauses of showing 32a.When receiving with lower-layer addresses relevant information by frame count processing unit 34, external equipment connection processing unit 35 sends these information to network comtrol server 4.
In this embodiment, external equipment connection processing unit 35 has SNMP.Receiving SNMP query requests or SNMP from packet transfer device 2 or network comtrol server 4 when request is set, external equipment connection processing unit 35 obtains from request and adds or delete the relevant information of supervision clauses and subclauses.When receiving the SNMP incident, external equipment connection processing unit 35 is according to the SNMP event notice, to network comtrol server 4 send with from the lower-layer addresses that receives by frame count processing unit 34 to relevant information.
3 pairs of frame transfer devices have the right lower-level frame of lower-layer addresses that the transmitted frequency that receives it from packet transfer device 2 is equal to or greater than threshold value to be counted.When the transmitted frequency with the right lower-level frame of lower-layer addresses surpassed predetermined value, frame transfer device 3 can be notified to it network comtrol server 4.
In addition, at the monitoring form that is used for counting transmitted frequency with the right frame of lower-layer addresses, can delete with the lower-layer addresses that it is communicated by letter unconfirmed in the given time to corresponding supervision clauses and subclauses.
Fig. 4 shows the block diagram according to the structure of the network comtrol server of present embodiment.Network comtrol server 4 comprises that external equipment controlled processing unit 41, traffic information collector unit 42, optimization security calculation processing unit 43 and routing iinformation change notification unit 44.
External equipment controlled processing unit 41 to traffic information collector unit 42 send 3 that receive from frame transfer device, with have pass through frame in a large number lower-layer addresses to relevant information.External equipment controlled processing unit 41 also sends with the interpolation of the clauses and subclauses of the frame transmission table 32a that transmits 23a or frame transfer device 3 of packet transfer device 2 or deletes relevant instruction or with the interpolation of the supervision clauses and subclauses of frame transfer device 3 or delete relevant instruction to corresponding apparatus.
In the present embodiment, external equipment connection processing unit 35 has SNMP.By request being set, can search, add or delete the frame transmission table 32a that transmits 23a, frame transfer device 3 of packet transfer device 2 or the clauses and subclauses of monitoring form 34a to packet transfer device 2 or frame transfer device 3 transferring of SNMP query requests or SNMP.
Traffic information collector unit 42 storage is 3 that receive from frame transfer device, with have pass through frame in a large number lower-layer addresses to relevant information.Traffic information collector unit 42 is also to each packet transfer device 2 and each frame transfer device 3 transferring of SNMP query requests, and storage obtain by the SNMP inquiry response that returns from packet transfer device 2 or frame transfer device 3, with the relevant information of frame transmission table 32a monitoring form 34a of transmitting 23a or each frame transfer device 3 of each packet transfer device 2.
Optimization security calculation processing unit 43 is carried out route and is calculated according to the information that is stored in the traffic information collector unit 42, has a large amount of right routes of lower-layer addresses by frame to determine to distribute to.
Routing iinformation changes the route that notification unit 44 storages are calculated by optimization security calculation processing unit 43.Routing iinformation changes the instruction that notification unit 44 also produces the right supervision clauses and subclauses of the lower-layer addresses in the deletion path of passing through frame count processing unit 34 that deletion is positioned at the frame transfer device 3 on the route that will change, and to outside Equipment Control processing unit 41 these instructions of transmission.Routing iinformation changes the frame transmission table 32a that notification unit 44 also adds the clauses and subclauses relevant with output link with the low layer destination-address that adds paths to the forward processing unit 32 of the frame transfer device 3 that is arranged on the route that is calculated by optimization security calculation processing unit 43.Routing iinformation changes notification unit 44 and also produces and will monitor that clauses and subclauses add the right instruction of lower-layer addresses to the route of pass through frame count processing unit 34 of frame transfer device 3 to, and to outside Equipment Control processing unit 41 these instructions of transmission.Routing iinformation changes notification unit 44 and also produces according to the result of calculation of transmitting processing unit 23 that is positioned at the packet transfer device 2 on the route that is calculated by optimization security calculation processing unit 43, rewrite and add the instruction of the corresponding output link of low layer destination-address of route, and send these instructions to outside Equipment Control processing unit 41.
Therefore, network comtrol server 4 can add or the clauses and subclauses of the monitoring form 34a of delete frame transfer equipment 3.
Next, with reference to Fig. 2, the operation according to the packet transfer device 2 of present embodiment is described.
The operation of packet transfer device 2 can be divided into frame transfer operation, the operation of frame transmission destination address modification roughly and transmit and upgrade operation.Below, will be described each operation.
With the descriptor frame transfer operation.
The received frame processing unit 21 of packet transfer device 2 receives the lower-level frame that sends from any packet transfer device 2 of previous dive, and sends the header of lower-level frame to transmission sources frame address extraction unit 25, transmits the payload of lower-level frame to packet processing unit 22.
As upper-layer packet when received frame processing unit 21 receives the payload of lower-level frame, packet processing unit 22 extracts the destination-address of upper-layer packet, and sends it to and transmit processing unit 23.
When packet processing unit 22 receives the destination-address of upper-layer packet, transmit processing unit 23 search and transmit 23a, to detect the low layer destination-address that should transmit packet transfer device 2 upper-layer packet, next jumping to it.Testing result and upper strata destination-address (address resolution information) are sent to packet processing unit 22 and address resolution information extraction unit 27.
When transmitting processing unit 23 and receive address resolution information, packet processing unit 22 sends to transmission frame processing unit 24 with upper-layer packet with address resolution information.
Transmission frame processing unit 24 is set to payload from the upper-layer packet that packet processing unit 22 receives, according to the low layer destination-address that is included in the address resolution information that sends over upper-layer packet, create the lower-level frame header, and send the lower-level frame that comprises payload and lower-level frame header to the packet transfer device 2 of next jumping.
Next, the descriptor frame transmission destination is changed operation.
Transmission sources frame address extraction unit 25 receives the lower-level frame header from received frame processing unit 21, and extracts the transmission sources address of lower-level frame, i.e. low layer transmission sources address from header.If the low layer transmission sources address that is extracted is not the address by user network 6, transmission sources frame address extraction unit 25 changes notification unit 28 to the frame transmission destination and sends low layer transmission sources address.
Address resolution information extraction unit 27 is from transmitting processing unit 23 receiver address resolving informations.If be included in low layer destination-address in the address resolution information and be not address, change notification unit 28 to the frame transmission destination and send the address resolution information by user network 6.
The frame transmission destination changes notification unit 28 and receives low layer transmission sources address and receive the low layer destination-address that is included in the address resolution information from address resolution information extraction unit 27 from transmission sources frame address extraction unit 25.The reception number of times of the lower-level frame of (lower-layer addresses to) is counted to having low layer transmission sources address and low layer destination-address by classified counting processing unit 28a.When in the given time to any lower-layer addresses during to counting pre-determined number (for example, in 60 seconds 1000 times or more), the frame transmission destination change notification unit 28 with described any lower-layer addresses to being notified to monitoring form items for information notification unit 29.In addition, the frame transmission destination changes the address resolution information of notification unit 28 according to the basis that is used as the right low layer destination-address of any lower-layer addresses, produce the payload that the frame transmission destination changes notification frame, also, produce the header that the frame transmission destination changes notification frame according to any right low layer transmission sources address of lower-layer addresses.Send the frame transmission destination that is produced to transmission frame processing unit 24 and change notification frame.
The lower-layer addresses that monitoring form items for information notification unit 29 received frame transmission destinations change notification unit 28 is right, and pass through frame count processing unit 34 at default dedicated frame transfer equipment 3, produce SNMP request is set, add the supervision clauses and subclauses that the number of pass times with the right lower-level frame of lower-layer addresses is counted with indication.Send the SNMP that is produced to transmission frame processing unit 24 request is set.
Transmission frame processing unit 24 changes notification unit 28 received frame transmission destinations from the frame transmission destination and changes notification frame, and this frame is sent to the packet transfer device 2 of previous dive.Transmission frame processing unit 24 receives SNMP from monitoring form items for information notification unit 29 request is set, and SNMP is provided with request sends to dedicated frame transfer equipment 3.
Packet transfer device 2 can surpass the lower-layer addresses of predetermined threshold to being notified to predetermined frame transfer device 3 with its count value.Therefore, the lower-layer addresses that can be counted by frame transfer device 3 is minimum and required to suppressing.
Packet transfer device 2 can also be carried out the forwarding of received upper-layer packet and handle, and sends the address resolution information of the packet transfer device of next jumping to the packet transfer device of previous dive.
Next, description is transmitted the renewal operation.
Received frame processing unit 21 received frame transmission destinations change notification frame, and change the payload that processing unit 26 sends this frame to the frame transmission destination.
Receiving the frame transmission destination from received frame processing unit 21 when changing the payload of notification frame, the frame transmission destination changes processing unit 26 and extract address resolution information from payload, and sends it to and transmit processing unit 23.
When changing processing unit 26 from the frame transmission destination and receive address resolution information, transmit processing unit 23 and it is registered in transmits among the 23a.
Address resolution information is notified to packet transfer device 2 according to present embodiment, and it is registered in transmits among the 23a.Therefore, can transmit the follow-up upper-layer packet of going to identical destination by having the more more suitable route of high transfer quality.
Next, will the operation according to the frame transfer device 3 of present embodiment be described.
The operation of frame transfer device 3 can be divided into monitoring form roughly and upgrade operation, frame transfer operation and operate by frame count.Below, will be described each operation.
To describe monitoring form and upgrade operation.
External equipment connection processing unit 35 receives SNMP request is set, add the supervision clauses and subclauses with indication, count having, and the monitoring form clauses and subclauses that lower-layer addresses is right are added and are registered among the monitoring form 34a by frame count processing unit 34 from the number of pass times of the right lower-level frame of any lower-layer addresses of packet transfer device 2.
Next, with the descriptor frame transfer operation.
Lower-layer addresses extraction unit 31 receives lower-level frame from the frame transfer device 3 of previous dive, from the header of frame, extract low layer transmission sources address and low layer destination-address, the lower-layer addresses that extracted to being notified to by frame count processing unit 34, and is sent lower-level frame to forward processing unit 32.
Forward processing unit 32 extracts the low layer destination-address from the lower-level frame that lower-layer addresses extraction unit 31 receives, and by searching frame transmission table 32a, detection will be to the address of its transmission with low layer destination-address frame transfer device 3 corresponding lower-level frame, next jumping.Testing result is sent to transmission frame processing unit 33 with lower-level frame.
Transmission frame processing unit 33 sends the lower-level frame that receives from forward processing unit 32 to the address of frame transfer device 3 that receive simultaneously, next jumping.
Next, description is operated by frame count.
It is right to receive lower-layer addresses by frame count processing unit 34 from lower-layer addresses extraction unit 31, at with described address to corresponding supervision clauses and subclauses, search surveillance table 34a, and with monitoring form 34a, with lower-layer addresses the counter of corresponding supervision clauses and subclauses is increased progressively one.
Above the supervision clauses and subclauses as 40,000,000 grade, the frame right to 35 transmission expressions of external equipment connection processing unit and supervision clauses and subclauses corresponding address passes through to count the notice that surpasses threshold value for its Counter Value among the monitoring form 34a.
When receiving notice, external equipment connection processing unit 35 produces to network comtrol server 4 notifies its frame by the lower-layer addresses right SNMP event notice of counting above threshold value, and notice is sent to network comtrol server 4.
When the timer that is used to count the scheduled time among the monitoring form 34a becomes 0, be 0 with the counter reset of all clauses and subclauses by frame count processing unit 34.At this moment, from monitoring form 34a its Counter Value of deletion adjacent be 0 right clauses and subclauses of lower-layer addresses before resetting.
By aforesaid operations, the clauses and subclauses that packet transfer device 2 can make frame transfer device 3 add or delete monitoring form 34a.
Can from monitoring form 34a, delete the right supervision clauses and subclauses of lower-layer addresses of its communication unconfirmed in the given time.Therefore, frame transfer device 3 can only keep minimum and essential supervision clauses and subclauses.
In addition, it is right to be equal to or greater than the lower-layer addresses of threshold value to the transmitted frequency that network comtrol server sends its lower-level frame.
Next, will the operation according to the network comtrol server 4 of present embodiment be described.
When frame transfer device 3 receives the SNMP event notice, external equipment controlled processing unit 41 extracts its transmitted frequency from the SNMP event notice to be equal to or greater than the lower-layer addresses of the threshold value in the frame transfer device 3 right, and it is right to send described lower-layer addresses to traffic information collector unit 42.
The lower-layer addresses that traffic information collector unit 42 its transmitted frequencies in frame transfer device 3 of storage are equal to or greater than threshold value is right.Traffic information collector unit 42 sends the SNMP query requests to each packet transfer device 2 and each frame transfer device 3, and from the SNMP inquiry response that returns by packet transfer device 2 and frame transfer device 3, collect the frame transmission table 32a information relevant of transmitting 23a and each frame transfer device 3 with monitoring form 34a with each packet transfer device 2.Traffic information collector unit 42 storage these information (traffic information), and to optimization security calculation processing unit 43 these information of transmission.
When traffic carrying capacity information collection unit 42 receives traffic information, optimization security calculation processing unit 43 is carried out according to traffic information and is used for optimization and transmits route calculation.To send to routing iinformation by the route that calculating obtains and change notification unit 44.
When receiving the information relevant from optimization security calculation processing unit 43 with the route that is used for optimization transmission route, routing iinformation change notification unit 44 at the packet transfer device on the route that appears at before changing 2 produce be used for deleting be registered in transmit 23a, with change before the notice of the corresponding clauses and subclauses of route, and at the frame transfer device on the route that appears at before changing 3 produce be used for deleting the monitoring form 34a that is registered in by frame count processing unit 34, with change before the notice of the corresponding clauses and subclauses of route.Routing iinformation changes notification unit 44 and sends described notice to outside Equipment Control processing unit 41.
In addition, routing iinformation changes notification unit 44 at the packet dedicated transfer equipment 2 and the frame transfer device 3 that appear on the route that optimization security calculation processing unit 43 calculated, generation be used for optimization transmit route route entry notice and be used for will being rewritten as the notice that optimization transmits the output link of route with the corresponding output link of any low layer destination-address transmitting 23a and frame transmission table 32a.Described notice is sent to external equipment controlled processing unit 41.
At the dedicated frame transfer equipment 3 that appears on the route that optimization security calculation processing unit 43 calculated, routing iinformation change notification unit 44 also produce with corresponding to result of calculation, with lower-layer addresses corresponding supervision clauses and subclauses are added to notice among the monitoring form 34a, and this notice is sent to external equipment controlled processing unit 41.
External equipment controlled processing unit 41 will change each notice that notification unit 44 receives from routing iinformation and be converted to SNMP request is set, and send it to each packet transfer device 2 and each frame transfer device 3.
Utilize aforesaid operations, according to the network comtrol server 4 of present embodiment can the optimization lower-level frame the SNMP event notice.
Next, with reference to the detailed example of Fig. 5 description according to the operation of the packet communication network system of present embodiment.Fig. 5 shows the view according to the detailed example of the operation of the packet communication network system 1 of present embodiment.
Packet transfer device 2a to 2e have respectively special-purpose upper strata address ip #9 to #13 and lower-layer addresses CORE#1 to #5, and link to each other with 3b with frame transfer device 3a respectively with special-purpose lower-layer addresses CORE#6 and #7 by link 1101 to 1110.Packet transfer device 2a to 2e by link 1111 to 1118 with have the special-purpose terminal equipment 5a of special-purpose upper strata address ip #1 and link to each other to 5h to #8.Packet transfer device 2a links to each other with network comtrol server 4 by link 1121 to 1127 with 3b with frame transfer device 3a to 2e.
Link 1111 to 1118 corresponding to as shown in Figure 1 user network 6a to 6d.
In above-mentioned packet communication network system 1, when the terminal 5a with upper strata address ip #1 begins to communicate by letter with the terminal 5e with upper strata address ip #5, transmit lower-level frame by packet transfer device 2a, frame transfer device 3a, packet transfer device 2e and packet transfer device 2c to terminal 5e from terminal 5a.This situation will be described, as example.
When receiving from terminal 5a when having upper strata destination-address IP#5 and upper strata transmission sources address ip #1 as the lower-level frame of payload, packet transfer device 2a is from upper strata destination-address IP#5 and transmit transmitting of processing unit 23 and detect the low layer destination-address and the output link that will transmit the packet transfer device 2 of upper strata destination-address IP#5 to it 23a.To detect as the low layer destination-address of the packet transfer device 2 that transmits target and be CORE#5 the output link detection to be link 1101.Packet transfer device 2 is the lower-layer addresses CORE#1 of packet transfer device 2a with low layer transmission sources address setting, and sends by making transmission frame processing unit 24 encapsulate the lower-level frame that received lower-level frame obtains again to link 1101.
At this moment, because the transmission sources address of received lower-level frame is the address by user network, packet transfer device 2a makes transmission sources frame address extraction unit 25 abandon the information relevant with the header of lower-level frame.Therefore, packet transfer device 2a does not count the frame number that passes through of lower-level frame.
Frame transfer device 3a receives lower-level frame by link 1101 from packet transfer device 2a, and according to the low layer destination-address CORE#5 of lower-level frame and the transmission table 32a of forward processing unit 32, search will send the link of received lower-level frame to it.Result as search detects link 1109.Frame transfer device 3a sends the lower-level frame that receives from packet transfer device 2a to link 1109.At this moment, frame transfer device 3a does not carry out the supervision to this lower-level frame.
Packet transfer device 2e receives lower-level frame from frame transfer device 3a, and sends the payload of the lower-level frame that is received by received frame processing unit 21 and the header that sends received lower-level frame to transmission sources frame address extraction unit 25 to packet processing unit 22.
The packet processing unit 22 of packet transfer device 2a extracts upper strata destination-address IP#5 from the payload (being upper-layer packet) of lower-level frame, and by searching upper strata destination-address IP#5 and the 23a that transmits that transmits processing unit 23, search should transmit the low layer destination-address of the packet transfer device of upper strata destination-address IP#5 to it.As Search Results, will detect to CORE#3 as the low layer destination-address of the packet transfer device that transmits target, will as the link detecting of export target link 1103.Packet transfer device 2e is the lower-layer addresses CORE#5 of packet transfer device 2e with low layer transmission sources address setting, and again encapsulates the lower-level frame that obtain to link 1103 transmissions by transmission frame processing unit 24 by link 1109 and frame transfer device 3a.
At this moment, the transmission sources frame address extraction unit 25 of packet transfer device 2e receives the header of lower-level frame, and extracts low layer transmission sources address CORE#1 from header, and changes notification unit 28 transmissions to the frame transmission destination.Address resolution information extraction unit 27 receives low layer destination-address CORE#3 from transmitting processing unit 23, as resolving information, and received information is sent to frame transmission destination change notification unit 28.
The frame transmission destination changes notification unit 28 and receives from the low layer transmission sources address CORE#1 of transmission sources frame address extraction unit 25 with from the low layer destination-address CORE#3 of address resolution information extraction unit 27.To pass through count increments one to corresponding grouping with the address that comprises low layer transmission sources address CORE#1 and low layer destination-address CORE#3 by classified counting unit 28a.
Packet transfer device 2c receives the lower-level frame of packet transfer device 2e.Send the payload of received lower-level frame to packet processing unit 22.Send the header of received lower-level frame to transmission sources frame address extraction unit 25.
Packet processing unit 22 extracts upper strata destination-address IP#5 from the payload (being upper-layer packet) of lower-level frame, and by searching upper strata destination-address IP#5 and the 23a that transmits that transmits processing unit 23, search will transmit the low layer destination-address of the terminal of upper strata destination-address IP#5 to it.As Search Results, the low layer destination-address that transmits target terminal is detected to USER#2, be link 1115 with the export target link detecting.Packet transfer device 2c is the lower-layer addresses CORE#3 of packet transfer device 2c with low layer transmission sources address setting, and has carried out the lower-level frame of encapsulation again to link 1115 transmissions by transmission frame processing unit 24.
At this moment, because the low layer destination-address (promptly by transmitting processing unit 23 detected low layer destination-address) of the lower-level frame that will send is the address by user network, address resolution information extraction unit 27 is not notified to the low layer destination-address frame transmission destination and changes notification unit 28.Therefore, packet transfer device 2c does not count the frame number that passes through of lower-level frame.
According to these processes, the lower-level frame that will send over from the terminal 5a with upper strata address ip #1 sends the terminal 5e with upper strata address ip #5 to.
Next, will describe and work as according to said circumstances, when the communication between the terminal 5e that repeats in the given time to have the terminal 5a of upper strata address ip #1 and have upper strata address ip #5 is equal to or greater than the number of times of predetermined threshold, the operation of packet communication network system.
When the count value of passing through classified counting unit 28a that the frame transmission destination of packet transfer device 2e changes notification unit 28 surpassed 1000 before the timer with CORE#1 right as lower-layer addresses and the corresponding clauses and subclauses of CORE#3 becomes 0, the frame transmission destination changed notification unit 28 lower-layer addresses is notified to monitoring form items for information notification unit 29 to CORE#1 and CORE#3.
The frame transmission destination changes notification unit 28 and produces frame transmission destination change notification frame, described frame transmission destination changes notification frame and comprises: payload, comprise address resolution information, comprise upper strata destination-address IP#5 and with the corresponding low layer destination-address of upper strata destination-address IP#5 CORE#3; And header, have low layer transmission sources address CORE#1, and send described frame transmission destination notification frame to transmission frame processing unit 24 as the low layer destination-address.
Transmission frame processing unit 24 sends received frame transmission destination notification frame to the packet transfer device 2a with lower-layer addresses CORE#1.
Monitoring form items for information notification unit 29 receives lower-layer addresses to CORE#1 and CORE#5.Monitoring form items for information notification unit 29 produces SNMP request is set, the supervision clauses and subclauses are added in indication in the monitoring form 34a that passes through frame count processing unit 34 of default frame transfer device (3a), described supervision clauses and subclauses have and are used for counter that the number of pass times with the right lower-level frame of described lower-layer addresses is counted and are used for timer every the scheduled time (as 600 seconds) reset count value, and described SNMP is provided with request sends to transmission frame processing unit 24.
Transmission frame processing unit 24 receives SNMP from monitoring form items for information notification unit 29 request is set, and connects link 1109 these requests of output of the link of packet transfer device 2e and frame transfer device 3a to usefulness.
When the external equipment connection processing unit 35 of frame transfer device 3a receives SNMP when request is set, frame transfer device 3a is provided with request according to SNMP, will register among the monitoring form 34a by frame count processing unit 34 CORE#1 and the corresponding supervision clauses and subclauses of CORE#3 with lower-layer addresses extraly.
On the other hand, the received frame processing unit 21 of packet transfer device 2a changes notification frame from packet transfer device 2c received frame transmission destination, and changes the payload that processing unit 26 sends described frame to the frame transmission destination.
The frame transmission destination changes the payload that processing unit 26 received frame transmission destinations change notification frame, and from described payload, extract address resolution information, be upper strata destination-address IP#5 and with the corresponding low layer destination-address of upper strata destination-address IP#5 CORE#3, and send these addresses to transmitting processing unit 23.
Transmit processing unit 23 and receive upper strata destination-address IP#5 and low layer destination-address CORE#3, and transmit 23a according to these address rewrites.More specifically, CORE#5 has been registered in and has transmitted among the 23a, as with the corresponding low layer destination-address of upper strata destination-address IP#5.Change notification frame according to the frame transmission destination, will transmit among the 23a, be rewritten as CORE#3 with the corresponding low layer destination-address of upper strata destination-address IP#5.
Handle according to this, packet transfer device 2a directly sends the lower-level frame of its upper strata destination-address corresponding to IP#5 to packet transfer device 2c, and need not via packet transfer device 2e.
Handle according to this, the frame transfer device 3a that packet transfer device 2a and packet transfer device 2c are carried out relaying begins the number of pass times with the right lower-level frame of the lower-layer addresses that comprises CORE#1 and CORE#3 is counted.
Suppose that in the monitoring form 34a that passes through frame count processing unit 34 of frame transfer device 3a, when the timer of any clauses and subclauses became 0, counter was 0.In this case, from monitoring form 34a, delete described any clauses and subclauses by frame count processing unit 34.Suppose that counter is equal to or less than 40,000 when the timer of any clauses and subclauses becomes 0,000.In this case, be 0 by frame count processing unit 34 with the counter reset of any clauses and subclauses, and counting pass through frame number once more.
Suppose, for example, the counter of CORE#1 and the corresponding clauses and subclauses of CORE#3 was surpassed 40,000,000 before timer becomes 0 with lower-layer addresses.In this case, 35 transmission expressions have lower-layer addresses surpasses threshold value to the number of pass times of the lower-level frame of CORE#1 and CORE#3 notice to the frame count processing unit 34 that passes through of frame transfer device 3 to external equipment connection processing unit.
When receiving described notice, external equipment connection processing unit 35 produces expression to have lower-layer addresses the number of pass times of the lower-level frame of CORE#1 and CORE#3 is surpassed the SNMP event notice of threshold value, and described notice is sent to network comtrol server 4.
Network comtrol server 4 receives the SNMP event notice from frame transfer device 3, and extracts lower-layer addresses to CORE#1 and CORE#3 from the SNMP event notice, and stores these information.In addition, network comtrol server 4 is to each frame transfer device 3 transferring of SNMP query requests, from the SNMP inquiry response that returns by each frame transfer device 3, collect the information of passing through frame count processing unit 34 of transmitting 23a and each frame transfer device 3, and carry out the transmission route of optimization whole group communications network system 1 and the calculating of volume of business.For example, when obtaining that the route between CORE#1 and the CORE#3 is become route calculation by frame transfer device 3b as a result the time from the route by frame transfer device 3a, by link 1121, packet transfer device 2a transmitted transmitting among the 23a, from the SNMP that link 1101 is rewritten as link 1105 request being set with the corresponding output link of low layer destination-address CORE#3 of processing unit 23 to packet transfer device 2a transmission.
In addition, by link 1123, to frame transfer device 3a transmission deletion be registered among the monitoring form 34a that passes through frame count processing unit 34 of frame transfer device 3a, with lower-layer addresses the SNMP of CORE#1 and the corresponding clauses and subclauses of CORE#3 is provided with request.
In addition, generation will comprise that the SNMP that is used for having the counter that lower-layer addresses counts the number of pass times of the lower-level frame of CORE#1 and CORE#3 and being used for adding to every the supervision clauses and subclauses of the timer of 600 seconds reset count values the monitoring form 34a that passes through frame count processing unit 34 of frame transfer device 3b is provided with request, with the SNMP among the frame transmission table 32a that the clauses and subclauses that wherein are set to link 1107 with the output link of the corresponding lower-level frame of low layer destination-address CORE#3 is added to forward processing unit 32 request is set, and, send to frame transfer device 3b by link 1125.
Packet transfer device 2a receives SNMP from network comtrol server 4 request is set, with be registered in transmit processing unit 23 transmit among the 23a, be rewritten as link 1105 with the corresponding output link of low layer destination-address CORE#3 from link 1101, and send SNMP to network comtrol server 4 response be set.
Frame transfer device 3a receives SNMP from network comtrol server 4 request is set, deletion be registered in by in the frame count processing unit 34, with lower-layer addresses to CORE#1 and the corresponding clauses and subclauses of CORE#3, and send SNMP to network comtrol server 4 response be set.
Frame transfer device 3b receives SNMP from network comtrol server 4 request is set, to comprise being used for being registered in monitoring form 34a extraly, and response will be set to network comtrol server 4 transferring of SNMP by frame count processing unit 34 to having the counter that lower-layer addresses counts the number of pass times of the lower-level frame of CORE#1 and CORE#3 and being used for supervision clauses and subclauses every the timer of 600 seconds reset count values.
The clauses and subclauses that frame transfer device 3b also will be wherein be set to link 1107 with the output link of the corresponding lower-level frame of low layer destination-address CORE#3 register among the frame transmission table 32a of forward processing unit 32 extraly, and to network comtrol server 4 transferring of SNMP response are set.
Utilize this to handle, the route between CORE#1 and the CORE#3 is become route by frame transfer device 3b from the route by frame transfer device 3a.
Utilize aforesaid operations, in the packet communication network system according to present embodiment, the lower-layer addresses that packet transfer device 2 specifies its upper strata transmitted frequency to be equal to or greater than threshold value is right, and it is notified to frame transfer device.In addition, can and the corresponding packet transfer device in low layer transmission sources address and and send to and directly transmit grouping between the corresponding packet transfer device of low layer destination-address of packet transfer device.3 of frame transfer devices have minimum and essential supervision clauses and subclauses, and its lower-level frame transmitted frequency can be equal to or greater than the lower-layer addresses of threshold value to being notified to network comtrol server.Network comtrol server 4 can add or delete and is used to count and the clauses and subclauses of lower-layer addresses to the form of the transmitted frequency of corresponding lower-level frame, can also according between the packet transfer device 2, the transmitted frequency of lower-level frame switches the transmission route.As a result, can improve the efficient of traffic engineering.
Can realize in above-mentioned packet transfer device 2, frame transfer device 3, network comtrol server 4 and the terminal 5 each by computer.Described computer comprises CPU, ROM (read-only memory), RAM (random access memory), as auxiliary storage devices such as floppy devices, as big volume, external memory device such as hard disc apparatus with to the interface equipment of link.
As being stored in, provide the program that makes computer be used as packet transfer device 2, frame transfer device 3 or network comtrol server 4 as the program in the storage mediums such as floppy disk, CD-ROM or storage card.In the time of in the auxiliary storage device that storage medium is inserted computer, read the program that is stored in this medium.CPU writes RAM or External memory equipment with the program of being read, and according to this program, carries out the processing described in the foregoing description, thereby carries out multiple function.
As the circuit that connects packet transfer device 2, frame transfer device 3, network comtrol server 4 and terminal 5, be user network 6, link 1101 to 1118 and link 1121 to 1127, not only can use as high speed circuits such as optical cables, also can use multiple All other routes.
[second embodiment]
To utilize IPv6 (IPv 6) wherein not have to connect and transmit network struction on photonic network and make up and be used for storage and comprise that a plurality of IPv4 (internet protocol version four) do not have the example that VPN (Virtual Private Network) service that connects the user network that transmits network provides network, describe the second embodiment of the present invention.
Fig. 9 shows the block diagram according to the example of the network model of second embodiment of the invention.Fig. 9 shows the structure of the network model of the present embodiment of seeing from the viewpoint of packet transfer route.After this, will be called the transmission plane from the network model that the viewpoint of packet transfer route is seen.
With the photonic network 101 that connects network comprise with the wavelength switching system 102,103 that connects switching node with 104 with the termination function unit that is connected network.The termination function unit that connects network comprises as the core node 126 of connectionless packet transfer node (corresponding to the frame transfer device of first embodiment) and the fringe node 105,112 and 119 that is connected packet communicate terminal (corresponding to the packet transfer device of first embodiment) as nothing.
Fringe node 105 has connecting interface 109,110 and 111.Fringe node 112 has connecting interface 116,117 and 118.Fringe node 119 has connecting interface 123,124 and 125.
Core node 126 has connecting interface 127,128 and 129.
To be arranged between fringe node 105 and the wavelength switching system 120 with the transmission link 130 of the transmission link that connects network.Transmission link 131 is arranged between wavelength switching system 102 and 103.Transmission link 132 is arranged between wavelength switching system 102 and 104.Transmission link 135 is arranged between wavelength switching system 102 and the core node 126.Wavelength path is set to connect.
In the present embodiment, as shown in Figure 9, wavelength path 136 is arranged between fringe node 105 and the core node 126, as default wavelength path.Wavelength path 137 is arranged between core node 126 and the fringe node 119.Wavelength path 138 is arranged between core node 126 and the fringe node 112.
Wavelength path 136 utilizes the connecting interface 109 of fringe node 105 and the connecting interface 129 of core node 126.Wavelength path 137 utilizes the connecting interface 128 of core node 126 and the connecting interface 123 of fringe node 119.Wavelength path 138 utilizes the connecting interface 127 of core node 126 and the connecting interface 116 of fringe node 112.
Be used as the IPv6 network 139 that does not have the connection grouping conveying network and comprise core node 126 that is used as IPv6 grouping transmission node and the fringe node 105,112 and 119 that is used as the IPv6 packet communicate terminal.
Comprise as the fringe node 105,112 of IPv4 via node and 119 and as the IPv4 network 140 of user network as the user terminal 141 to 158 of IPv4 user terminal.
User terminal 141 and 142 belongs to VPN 159. User terminal 143 and 144 belongs to VPN160.User terminal 145 and 146 belongs to VPN 161. User terminal 147 and 148 belongs to VPN162.User terminal 149 and 150 belongs to VPN 163. User terminal 151 and 152 belongs to VPN164.User terminal 153 and 154 belongs to VPN 165. User terminal 155 and 156 belongs to VPN166.User terminal 157 and 158 belongs to VPN 167.
Fringe node 105 and user terminal 141,142,143,144,145 link to each other with 173 by access link 168,169,170,171,172 with 146.Fringe node 112 and user terminal 147,148,149,150,151 link to each other with 179 by access link 174,175,176,177,178 with 152.Fringe node 119 and user terminal 153,154,155,156,157 link to each other with 185 by access link 180,181,182,183,184 with 158.
In this network model, fringe node 105,112 and 119 has transmitting function unit 106 to 108,113 to 115 and 120 to 122 respectively.These transmitting function unit storage users' VPN.For example, belong to the user terminal 141 that is positioned at the VPN 159 below the fringe node 105 and 142 by transmitting function unit 106 with belong to the user terminal that is positioned at the VPN below another fringe node and communicate.
By access link, to the IPv4 grouping of fringe node transmission from user terminal.Fringe node to user terminal under the corresponding transmitting function of VPN unit send the IPv4 grouping that transmits from user terminal.The transmitting function unit is the IPv6 grouping with the IPv4 packet encapsulation.By wavelength path, transmit the IPv6 grouping that is produced to the core node of receiver side or fringe node.
Core node 126 sends the IPv6 grouping that receives from wavelength path to another wavelength path, thereby transmits the IPv6 grouping to the fringe node of receiver side.
The fringe node of receiver side extracts the IPv4 grouping from received IPv6 grouping, and by access link, transmits the IPv4 grouping that is extracted to the user terminal that is positioned at the destination.
The purpose of present embodiment is: in this network model (transmission plane), service bandwidth and priority according to the IPv6 grouping, in the short period of practicality, calculate simultaneously and be provided with photonic network wavelength path best route and to the IPv6 packet allocation in optimal wavelength path.
In order to make this set become possibility, in the present embodiment, as shown in figure 10 network model is applied to as shown in Figure 9 network model (transmission plane).Figure 10 shows the structure of the network model of the present embodiment of seeing from the viewpoint of traffic carrying capacity control.After this, will be called control plane from the network model that the viewpoint of traffic carrying capacity control is seen.
In this network model (control plane), traffic carrying capacity control appliance 202 (corresponding to the network comtrol server of first embodiment) links to each other with 119 by supervising the network 201 and wavelength switching system 102 to 104, core node 126 and fringe node 105,112.
Wavelength switching system 102 to 104 comprises wavelength swap table 210 to 212 respectively.Core node 126 comprises IPv6 transmission table 213.Fringe node 105,112 and 119 comprise respectively IPv6 transmission table 214 to 216 and IPv4 transmission table 217 to 219.
Wavelength swap table 210 to 212 corresponds to each other the input interface number, input wavelength, output interface number of wavelength switching system 102 to 104 and output wavelength.The IP address, destination that the IPv6 transmission table 213 of core node 126 makes input IPv6 grouping is corresponding to output interface number.Fringe node 105,112 and 119 IPv6 transmission table 214 No. 216 correspond to each other IP address, destination, IPv6 address and the output interface of input IPv4 grouping to.IPv4 transmission table 217 to the 219 IP addresses, destination that make input IPv4 grouping corresponding to output interface number.Traffic carrying capacity control appliance 202 can rewrite these forms by supervising the network 210.
The structure of the traffic carrying capacity control appliance 202 by as shown in figure 11 realizes the rewriting to form.As shown in figure 11, traffic carrying capacity control appliance 202 comprises statistical information collector unit 301, statistical information administrative unit 302, IPv6 flow distribution/wavelength path route calculating and setting unit 304, wavelength switching control unit 306 and fringe node control unit 307.
Each fringe node 105,112 and 119 all has: is used to write down and comprises by the IPv6 address, IPv6 transmission packets source of each institute's transmission and IPv6 address, destination device to the statistical information of the bandwidth of defined each stream and priority; And the statistical information that is used for being write down is notified to the device of traffic carrying capacity control appliance 202.
The statistical information collector unit 301 of traffic carrying capacity control appliance 202 is collected from the statistical information of fringe node 105,112 and 119, and collected statistical information is transferred to statistical information administrative unit 302.Statistical information administrative unit 302 is analyzed the information of collecting from fringe node 105,112 and 119, and creates IPv6 flow statistic tabulation (stream tabulation) 303.Each clauses and subclauses of IPv6 flow statistic tabulation 303 comprise transmission sources IPv6 address, IPv6 address, destination, IPv6 flow priority and IPv6 stream bandwidth.Send IPv6 flow statistic tabulation 303 to IPv6 flow distribution/wavelength path route calculating and setting unit 304.
Distribution Calculation and the wavelength path route that IPv6 flows to wavelength path carried out according to IPv6 flow statistic tabulation 303 in IPv6 flow distribution/wavelength path route calculating and setting unit 304, and creates wavelength path solution tabulation 305, controls traffic carrying capacity.Below, with reference to Figure 12 traffic carrying capacity control method according to present embodiment is described.In order to describe in detail, with tabulation shown in Figure 13 example as IPv6 flow statistic tabulation 303.
IPv6 flow distribution/wavelength path route calculating and setting unit 304 tabulates 303 from the IPv6 flow statistic that statistical information administrative unit 302 receives as shown in figure 13, and according to the descending of priority, IPv6 stream (clauses and subclauses) to IPv6 flow statistic tabulation 303 sorts, as shown in figure 14.At each priority, flow to line ordering (the step S1 among Figure 12) to what have an equal priority according to the descending of bandwidth.
IPv6 flow distribution/wavelength path route calculating and setting unit 304 supposes that for being registered in each the flow distribution wavelength path candidate in the IPv6 flow statistic tabulation 303 of having carried out ordering as shown in figure 14 wavelength path (connection) is arranged between the transmission sources fringe node and destination fringe node of this stream.Uppermost stream begins from the tabulation 303 of IPv6 flow statistic, carries out this operation in proper order at all streams, thereby creates wavelength path candidate list (connection candidate list) 308 (step S2) as shown in figure 15.With reference to Figure 15, " EN " represents fringe node.The wavelength path candidate list corresponds to each other transmission sources fringe node, destination fringe node, flow priority and the stream bandwidth of each stream.Uppermost stream has the highest priority in the IPv6 flow statistic tabulation 303, and if priority identical, have the wideest bandwidth.
At this moment, IPv6 flow distribution/wavelength path route calculating and setting unit 304 will have one or more flow distribution of identical traffic source fringe node, identical destination fringe node and equal priority and give identical wavelength path candidate, thereby make the summation of bandwidth be no more than wavelength path candidate's capacity.Therefore, the priority that is registered in each the wavelength path candidate in the wavelength path candidate list 308 is to distribute to the priority of this wavelength path candidate's stream.Each wavelength path candidate's bandwidth equals to distribute to the summation of bandwidth of one or more streams of this wavelength path candidate.
For example, in IPv6 flow statistic tabulation 303 as shown in figure 15, be that " 105 " are given as the transmission sources fringe node and with " 112 " the wavelength path candidate as the destination fringe node for the uppermost flow distribution of " IPv6#D " in " IPv6#A " and IPv6 address, destination with transmission sources IPv6 address.Second stream (transmission sources IPv6 address is that " IPv6#B " and IPv6 address, destination are " IPv6#D ") is distributed to identical wavelength path candidate.At this moment, this wavelength path candidate's bandwidth equals the summation of the bandwidth of uppermost and second stream, i.e. " 10 ".When distributing second stream, the wavelength path candidate does not have residual capacity.Therefore, be provided with " 105 " as the transmission sources fringe node and with " 112 " another wavelength path candidate as the destination fringe node, and with the 3rd and the 4th flow distribution to this wavelength path candidate.All streams in the IPv6 flow statistic tabulation 303 carry out this wavelength path candidate allocation.
The transmitting function unit 106,107 of fringe node 105 and 108 IPv6 address are " IPv6#A ", " IPv6#B " and " IPv6#C ", as shown in Figure 9.The transmitting function unit 113,114 of fringe node 112 and 115 IPv6 address are " IPv6#D ", " IPv6#E " and " IPv6#F ".The transmitting function unit 120,121 of fringe node 119 and 122 IPv6 address are " IPv6#G ", " IPv6#H " and " IPv6#I ".
Next, IPv6 flow distribution/wavelength path route calculating and setting unit 304 sorts to as shown in figure 15 wavelength path candidate list 308 according to the descending of priority, as shown in figure 16.At each priority, according to the descending of bandwidth, to the wavelength path candidate with equal priority sort (the step S3 among Figure 12).
IPv6 flow distribution/wavelength path route calculating and setting unit 304 from carrying out as shown in figure 16 extract the wavelength path candidate the wavelength path candidate list 308 of ordering, and be the connecting interface of described wavelength path candidate preserving edge node.Uppermost wavelength path candidate begins from wavelength path candidate list 308, carries out this connecting interface in proper order for all wavelengths path candidates and keeps (the step S4 among Figure 12).In example shown in Figure 17, can for wavelength path candidate list 308 first, second and the 5th wavelength path candidate keep connecting interface, and do not keep for remaining wavelength path candidate.
IPv6 flow distribution/wavelength path route calculating and setting unit 304 wavelength path solution (the step S5 among Figure 12) that selection need not to be provided with from wherein register the wavelength path solution tabulation (connecting the solution tabulation) that the wavelength path (wavelength path solution) that will be provided with is arranged.The wavelength path solution that need not to be provided with is to appear in the wavelength path solution tabulation but do not appear at wavelength path solution in the current wavelength path candidate list 308.
Among the wavelength path candidate that can be retained in IPv6 flow distribution/wavelength path route calculating and setting unit 304 wavelength path candidate lists 308, unregistered forbidding connect in the tabulation (being described after a while), uppermost wavelength path candidate is set to the wavelength path candidate as processing target, and will compare (the step S6 among Figure 12) as the wavelength path solution of the wavelength path candidate's of processing target priority and bandwidth and selection from the tabulation of wavelength path solution.This relatively in, priority at first relatively.If priority is identical, then compare bandwidth.
If among the step S7 be "Yes", if promptly as the wavelength path candidate of processing target have greater than the priority of the wavelength path solution of from the tabulation of wavelength path solution, selecting and bandwidth (if when the wavelength path candidate as processing target have higher priority or priority identical, when it has wideer bandwidth), the wavelength path candidate as processing target is got rid of in IPv6 flow distribution/wavelength path route calculating and setting unit 304 from wavelength path candidate list 308, and it is added in the wavelength path solution tabulation, and from the tabulation of wavelength path solution, get rid of selected wavelength path solution, and it is added in the wavelength path candidate list 308, thereby change connecting interface reserved state (step S8).In this manner, the tabulation of wavelength path solution can be created and upgrade, thereby the priority and the bandwidth of wavelength path solution can be improved.
When the wavelength path candidate as processing target had the priority that is equal to or less than selected wavelength path solution and bandwidth, IPv6 flow distribution/wavelength path route calculating and setting unit 304 will connect in the tabulation (the step S9 among Figure 12) at forbidding as the wavelength path candidate record of processing target.
When using forbidding to connect tabulation, can prevent to assess continuously evaluated mistake wavelength path candidate once.Can prevent wavelength path candidate's that its priority and bandwidth are not improved assessment.Owing to can increase the possibility that obtains the optimal wavelength path candidates with smaller calculation, can reduce amount of calculation.
When uppermost wavelength path that the wavelength path solution is tabulated is arranged between transmission sources fringe node and the destination fringe node, the route (the step S10 among Figure 12) that the IPv6 flow distribution/wavelength path route calculating and setting unit 304 calculates in the photonic network 101.Can guarantee the solution required transfer resource of uppermost wavelength path (the step S11 among Figure 12) of tabulating in transmission wavelength path in the transmission link on the routes that IPv6 flow distribution/wavelength path route calculating and setting unit 304 is determined to be calculated.
If among the step S11 be "Yes", the function of exchange of IPv6 flow distribution/wavelength path route calculating and setting unit 304 control wavelength switching systems 102 to 104 is to be provided with the wavelength path solution uppermost wavelength path of tabulating.In addition, the transfer function of the transmission sources fringe node of IPv6 flow distribution/wavelength path route calculating and setting unit 304 control flows, thereby utilize described wavelength path to be transmitted in to distribute among the step S2 the tabulate stream of uppermost wavelength path of wavelength path solution, and from the tabulation of wavelength path solution deletion uppermost wavelength path (the step S12 among Figure 12).
For example, IPv6 flow distribution/wavelength path route calculating and setting unit 304 is by the wavelength swap table 210 to 212 of wavelength switching control unit 306 rewriting wavelength switching systems 102 to 104, to set up wavelength path 186 to 188, as shown in figure 18.Simultaneously, the IPv6 transmission table 214 that IPv6 flow distribution/wavelength path route calculating and setting unit 304 is provided with fringe node 105,112 and 119 by fringe node control unit 307 is to 216, thereby makes set fringe node 105,112 and 119 provide the IPv6 that distributes as Figure 15 stream to wavelength path 186 to 188.At this moment, fringe node 105,112 and 119 transmits table 214 to 216 according to IPv6, and sending to wavelength path 186 to 188 will be to the grouping of destination fringe node transmission.
The IPv6 transmission table 214 that the IPv6 flow distribution/wavelength path route calculating and setting unit 304 is provided with fringe node 105,112 and 119 is to 216, thus make plan flow through in the wavelength path candidate list 308 can not for its IPv6 stream that keeps the wavelength path of connecting interface can be by core node 126 wavelength path 136 to 138 of flowing through.
If among the step S11 be "No", uppermost wavelength path is got rid of in IPv6 flow distribution/wavelength path route calculating and setting unit 304 from the tabulation of wavelength path solution, and adds it in the wavelength path candidate list 308 (step S13).
The above-mentioned processing of traffic carrying capacity control appliance 202 repeated execution of steps S1 in the S13, up to the tabulation of wavelength path solution for empty.When the tabulation of wavelength path solution is sky, the control of winding-up amount.
When in step S4, can not be when being registered in any wavelength path candidates in the wavelength path candidate list 308 and keeping connecting interface, perhaps when in step S11, can not be when being registered in any wavelength path solution in the wavelength path solution tabulation and guaranteeing transfer resource, also can the control of winding-up amount.Even in this case, also finish traffic carrying capacity control as shown in figure 12.
Utilize above-mentioned control, in the present embodiment, the IPv6 that calculates on the IPv6 network 139 flows to the optimal allocation of the wavelength path on the photonic network 101, and when considering priority and bandwidth, calculates and be provided with the best route of the wavelength path on the photonic network 101.Utilize this operation, make the transmission maximum capacity of IPv6 network 139, and can make the utilization ratio maximization of transmission link in the photonic network 101 and connecting interface.
[the 3rd embodiment]
Next, the third embodiment of the present invention will be described.The structure of the network model of present embodiment is identical with second embodiment, and will utilize the reference number identical with Fig. 9 to 11 to be described.Figure 19 shows the flow chart according to the traffic carrying capacity control method of present embodiment.Represent processing operation identical among Figure 19 with step number identical among Figure 12.
Identical among the processing of step S1 in the S7 and second embodiment.If among the step S7 be "Yes", if promptly have priority and bandwidth greater than the wavelength path solution of from the tabulation of wavelength path solution, selecting as the wavelength path candidate of processing target, the wavelength path candidate as processing target is got rid of in the IPv6 flow distribution of traffic carrying capacity control appliance 202/wavelength path route calculating and setting unit 304 from wavelength path candidate list 308, and it is added in the wavelength path solution tabulation, and from the tabulation of wavelength path solution, get rid of selected wavelength path solution, and it is added in the wavelength path candidate list 308, thereby change connecting interface reserved state (step S8).
Processing in end step S8, when perhaps being "No" among the step S7, IPv6 flow distribution/wavelength path route calculating and setting unit 304 will be recorded in forbidding as the current execution number of times of the comparison process of wavelength path candidate in step S6 of processing target and connect in the tabulation (the step S14 among Figure 19).
IPv6 flow distribution/wavelength path route calculating and setting unit 304 determines whether exist with the little predetermined number of handling of current execution number of times frequently in the forbidding connection tabulation or more carry out the wavelength path candidate (step S15) that number of times writes down.If among the step S15 be "Yes", then connect deletion this wavelength path candidate (step S16) the tabulation from forbidding.Identical among the processing of step S10 in the S13 and second embodiment.
According to present embodiment, can obtain the effect identical with second embodiment.In addition, according to present embodiment, will be recorded in forbidding with the current execution number of times of comparison process as the wavelength path candidate of processing target and connect in the tabulation.Delete the tabulation with comparing than the little predetermined number of handling of current execution number of times or more carrying out the wavelength path candidate that number of times writes down from forbidding to connect.Therefore, can from forbidding connect deletion the tabulation it is recorded forbidding connect in the tabulation after the wavelength path candidates of more over and done with times, and it is set to wavelength path candidate as processing target once more.In addition,, compare, can suppress to forbid the increase of connection list size with second embodiment owing to from forbidding connection tabulation, deleted with comparing the little predetermined number of handling of current execution number of times or more carrying out the wavelength path candidate that number of times writes down.
[the 4th embodiment]
In the second and the 3rd embodiment, do not describe from fringe node 105,112 and 119 sending the timing of statistical information and making traffic carrying capacity control appliance 202 create the timing of IPv6 flow statistic tabulation 303 to traffic carrying capacity control appliance 202.In the second and the 3rd embodiment, traffic carrying capacity control appliance 202 can be provided with the statistical information reporting interval of fringe node 105,112 and 119.
Fringe node 105,112 and 119 by received IPv6 address, transmission packets source and IPv6 address, the destination statistical information to defined each stream, and is notified to traffic carrying capacity control appliance 202 with this statistical information with set reporting interval record.
The statistical information administrative unit 302 of traffic carrying capacity control appliance 202 is analyzed the information of collecting from fringe node 105,112 and 119.If this information is different from the information of the IPv6 flow statistic tabulation of having created 303,, upgrade IPv6 flow statistic tabulation 303 then according to the information of collecting from fringe node 105,112 and 119.
In the present embodiment, suitably control the statistical information reporting interval.Therefore, in the load on suppressed traffic amount control appliance 202 and fringe node 105,112 and 119, follow the moderate change in the service bandwidth, can keep the optimum network utilization ratio.
[the 5th embodiment]
In the second and the 3rd embodiment, traffic carrying capacity control appliance 202 can be provided with by transmission sources IPv6 address and IPv6 address, the destination threshold value to the bandwidth of defined each stream at fringe node 105,112 and 119.
The statistical information of each stream of the grouping that each fringe node 105,112 and 119 records are received.When the bandwidth of the stream that is write down surpasses set threshold value, will be notified to traffic carrying capacity control appliance 202 above the statistical information of the stream of threshold value.
The statistical information administrative unit 302 of traffic carrying capacity control appliance 202 is analyzed the information of collecting from fringe node 105,112 and 119, and upgrades IPv6 flow statistic tabulation 303.
In the present embodiment, when traffic carrying capacity sharply changes, send statistical information immediately, and irrelevant with reporting interval.Therefore, by following the rapid variation in the service bandwidth, can keep the optimum network utilization ratio.
[the 6th embodiment]
Below, will utilize IPv6 wherein not have to connect and transmit network struction and comprise that IPv4 (internet protocol version four) does not have the example on the photonic network that connects the user network that transmits network, describes present embodiment being used for storage.
Figure 20 shows the block diagram according to the example of the network model of sixth embodiment of the invention.Figure 20 shows the structure of the network model of the present embodiment of seeing from the viewpoint of packet transfer route.After this, will be called the transmission plane from the network model that the viewpoint of packet transfer route is seen.
Comprise with the wavelength switching system 402 to 406 and the termination function unit that is connected network that connect switching node with the photonic network 401 that connects network.The termination function unit that connects network comprises that the core node 423,429 as connectionless packet transfer node (corresponding to the frame transfer device of first embodiment) does not have the fringe node 407,411,415 and 419 that is connected packet communicate terminal (corresponding to the packet transfer device of first embodiment) with 435 with being used as.In the fringe node 407,411,415 and 419 each is corresponding to the pe router among Figure 30 501.In the core node 423,429 and 435 each is corresponding to electric P router five 02.In the wavelength switching system 402 to 406 each is corresponding to light P router five 03.
Fringe node 407 has connecting interface 409 and 410.Fringe node 411 has connecting interface 413 and 414.Fringe node 415 has connecting interface 417 and 418.Fringe node 419 has connecting interface 421 and 422.
Core node 423 has connecting interface 424 to 428.Core node 429 has connecting interface 430 to 434.Core node 435 has connecting interface 436 to 440.
To be arranged between fringe node 407 and the wavelength switching system 402 with the transmission link 441 of the transmission link that connects network.Transmission link 442 is arranged between core node 423 and the wavelength switching system 402.Transmission link 443 is arranged between wavelength switching system 402 and 403.Transmission link 444 is arranged between core node 429 and the wavelength switching system 403.Transmission link 445 is arranged between wavelength switching system 403 and 404.Transmission link 446 is arranged between core node 435 and the wavelength switching system 404.Transmission link 447 is arranged between fringe node 411 and the wavelength switching system 404.Transmission link 448 is arranged between fringe node 415 and the wavelength switching system 405.Transmission link 449 is arranged between wavelength switching system 402 and 405.Transmission link 450 is arranged between wavelength switching system 404 and 406.Transmission link 451 is arranged between fringe node 419 and the wavelength switching system 406.Wavelength path is set to connect.
In the present embodiment, as shown in figure 21, wavelength path 452 is arranged between fringe node 407 and the core node 423, as default wavelength path.Wavelength path 453 is arranged between fringe node 415 and the core node 423.Wavelength path 454 is arranged between core node 423 and 429.Wavelength path 455 is arranged between core node 429 and 435.Wavelength path 456 is arranged between fringe node 419 and the core node 435.Wavelength path 457 is arranged between fringe node 411 and the core node 435.
Wavelength path 452 utilizes the connecting interface 409 of fringe node 407 and the connecting interface 425 of core node 423.Wavelength path 453 utilizes the connecting interface 417 of fringe node 415 and the connecting interface 426 of core node 423.Wavelength path 454 utilizes the connecting interface 428 of core node 423 and the connecting interface 430 of core node 429.Wavelength path 455 utilizes the connecting interface 434 of core node 429 and the connecting interface 436 of core node 435.Wavelength path 456 utilizes the connecting interface 421 of fringe node 419 and the connecting interface 438 of core node 435.Wavelength path 457 utilizes the connecting interface 413 of fringe node 411 and the connecting interface 439 of core node 435.
Comprise as the core node 423,429 of IPv6 grouping transmission node and 435 and as the IPv6 network 476 that do not have to connect grouping conveying network as the fringe node 407,411,415 and 419 of IPv6 packet communicate terminal.
Comprise as the fringe node 407,411,415 of IPv4 via node and 419 and as the IPv4 network 477 of user network as the user terminal 460 to 467 of IPv4 user terminal.
Fringe node 407 links to each other with 469 by access link 468 with 461 with user terminal 460.Fringe node 411 links to each other with 471 by access link 470 with 463 with user terminal 462.Fringe node 415 links to each other with 473 by access link 472 with 465 with user terminal 464.Fringe node 419 links to each other with 475 by access link 474 with 467 with user terminal 466.
In this network model, fringe node 407,411,415 and 419 has transmitting function unit 408,412,416 and 420 respectively.Transmitting function unit 408,412,416 and 420 storage user terminals.For example, be positioned at user terminal 460 and 461 below the fringe node 407 by transmitting function unit 408 and the user terminal exchange IPv4 grouping that is positioned at below another fringe node.
By access link, to the IPv4 grouping of fringe node transmission from user terminal.Fringe node sends the IPv4 grouping that transmits from user terminal to the transmitting function unit.The transmitting function unit is the IPv6 grouping with the IPv4 packet encapsulation.By wavelength path, transmit the IPv6 grouping that is produced to the core node of receiver side or fringe node.
The header that the IPv6 that the core node affirmation receives from wavelength path divides into groups, and according to IPv6 transmission table, send received IPv6 to another wavelength path and divide into groups.
The fringe node of receiver side extracts the IPv4 grouping from received IPv6 grouping, confirm the header of IPv4 grouping, and by access link, transmits to the user terminal that is positioned at the destination.
In the present embodiment, will not be called the incision light path by having the wavelength path that congested core node is provided with.The purpose of present embodiment is: even compare with network size hour at the connecting interface number of fringe node, still can carry out setting, and can not reduce incision light path number, and utilize the incision light path to transmit by having the IPv6 grouping of congested core node.
In order to make this set become possibility, in the present embodiment, as shown in figure 22 network model is applied to as shown in figure 20 network model (transmission plane).Figure 22 shows the structure of the network model of the present embodiment of seeing from the viewpoint that connect to be provided with.After this, will be called control plane from the network model that the viewpoint that connects setting is seen.
In this network model (control plane), traffic carrying capacity control appliance 502 (corresponding to the network comtrol server of first embodiment) by supervising the network 501 and wavelength switching system 402 to 406, core node 423,429 with 435 and fringe node 407,411,415 link to each other with 419.
Wavelength switching system 402 to 406 comprises wavelength swap table 515 to 519 respectively.Core node 423,429 and 435 comprises that respectively IPv6 transmission table 520 is to 522.Fringe node 407,411,415 and 419 comprise respectively IPv6 transmission table 523 to 526 and IPv4 transmission table 527 to 530.
The wavelength swap table 515 to 519 of wavelength switching system 402 to 402 corresponds to each other the input interface number, input wavelength, output interface number of wavelength switching system 402 to 406 and output wavelength.Core node 423,429 and 435 IPv6 transmission table 520 to the 522 IP addresses, destination that make input IPv6 grouping corresponding to output interface number.Fringe node 407,411,415 and 419 IPv6 transmission table 523 No. 526 correspond to each other IP address, destination, IPv6 address and the output interface of input IPv4 grouping to.IPv4 transmission table 527 to the 530 IP addresses, destination that make input IPv4 grouping corresponding to output interface number.Traffic carrying capacity control appliance 502 can rewrite these forms by supervising the network 501.
The structure of the traffic carrying capacity control appliance 502 by as shown in figure 23 realizes the rewriting to form.As shown in figure 23, traffic carrying capacity control appliance 502 comprises statistical information collector unit 601, statistical information administrative unit 602, IPv6 flow distribution/wavelength path route calculating and setting unit 604, wavelength switching control unit 606, fringe node control unit 607 and core node control unit 608.
Each fringe node 407,411,415 and 419 all has: is used to write down and comprises by the IPv6 address, IPv6 transmission packets source of each institute's transmission and IPv6 address, destination device to the statistical information of the bandwidth of defined each stream and priority; And the statistical information that is used for being write down is notified to the device of traffic carrying capacity control appliance 502.For example, each fringe node 407,411,415 and 419 is provided with at interval from traffic carrying capacity control appliance 502 reception notifications, and carries out the record and the notice of statistical information with described reporting interval.
The statistical information collector unit 601 of traffic carrying capacity control appliance 502 is collected from the statistical information of fringe node 407,411,415 and 419, and collected statistical information is transferred to statistical information administrative unit 602.Statistical information administrative unit 602 is analyzed the information of collecting from fringe node 407,411,415 and 419, and the tabulation of establishment/renewal IPv6 flow statistic.Each clauses and subclauses of IPv6 flow statistic tabulation comprise transmission sources IPv6 address, IPv6 address, destination, IPv6 flow priority and IPv6 stream bandwidth.Send the tabulation of IPv6 flow statistic to IPv6 flow distribution/wavelength path route calculating and setting unit 604.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is according to the descending of priority, and tabulation is sorted to the IPv6 flow statistic.According to the descending of bandwidth, to having the line ordering that flows to of equal priority.IPv6 flow distribution/wavelength path route calculating and setting unit 604 supposes that for being registered in each the flow distribution wavelength path candidate in the IPv6 flow statistic tabulation of sorting wavelength path (connection) is arranged between the transmission sources fringe node and destination fringe node of this stream.Uppermost stream begins from the tabulation of IPv6 flow statistic, carries out this operation in proper order at all streams, thereby creates wavelength path candidate list (connection candidate list).The wavelength path candidate list corresponds to each other transmission sources fringe node, destination fringe node, flow priority and the stream bandwidth of each stream.
For example, the IPv6 address of supposing the transmitting function unit 408 of fringe node 407 is " IPv6#A ", the IPv6 address of the transmitting function unit 412 of fringe node 411 is " IPv6#B ", the IPv6 address of the transmitting function unit 416 of fringe node 415 is " IPv6#C ", and the IPv6 address of the transmitting function unit 420 of fringe node 419 is " IPv6#D ".In the tabulation of IPv6 flow statistic, be that " 407 " are given as the transmission sources fringe node and with " 412 " wavelength path as the destination fringe node for the flow distribution of " IPv6#B " in " IPv6#A " and IPv6 address, destination with transmission sources IPv6 address.
Next, IPv6 flow distribution/wavelength path route calculating and setting unit 604 sorts to the wavelength path candidate list according to the descending of priority.At each priority,, the wavelength path candidate with equal priority is sorted according to the descending of bandwidth.IPv6 flow distribution/wavelength path route calculating and setting unit 604 extracts the wavelength path candidate from the wavelength path candidate list that sorts, and is the connecting interface of described wavelength path candidate preserving edge node.Uppermost wavelength path candidate begins from the wavelength path candidate list, for all wavelengths path candidates is carried out this reservation in proper order.IPv6 flow distribution/wavelength path route calculating and setting unit 604 is in the wavelength path candidate list, for its reservation is that each possible wavelength path candidate regards the wavelength path (wavelength path solution) that will be provided with as, and described wavelength path candidate is added in the tabulation of wavelength path solution.
When uppermost wavelength path is arranged between transmission sources fringe node and the destination fringe node in the tabulation of wavelength path solution, the route that the IPv6 flow distribution/wavelength path route calculating and setting unit 604 calculates in the photonic network 401.Can guarantee the solution required transfer resource of uppermost wavelength path of tabulating in transmission wavelength path in the transmission link on the routes that IPv6 flow distribution/wavelength path route calculating and setting unit 604 is determined to be calculated.
If determine to guarantee described transfer resource, the function of exchange of IPv6 flow distribution/wavelength path route calculating and setting unit 604 control wavelength switching systems 402 to 406 is to be provided with the wavelength path solution uppermost wavelength path of tabulating.In addition, the transfer function of the transmission sources fringe node of IPv6 flow distribution/wavelength path route calculating and setting unit 604 control flows, thus utilize the transmission of described wavelength path to distribute to the tabulate stream of uppermost wavelength path of wavelength path solution.The transmitting function of core nodes is controlled in IPv6 flow distribution/wavelength path route calculating and setting unit 604 in addition, thereby utilize described wavelength path, transmit to the destination fringe node and to distribute to the tabulate stream of uppermost wavelength path of wavelength path solution, and from the tabulation of wavelength path solution the uppermost wavelength path of deletion.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 repeats above-mentioned ordering to the tabulation of IPv6 flow statistic, with the control core node, till the tabulation of wavelength path solution is for sky.
Can not guarantee the transfer resource that the transmission wavelength path is required if determine in the transmission link on the route that is calculated, uppermost wavelength path is got rid of in IPv6 flow distribution/wavelength path route calculating and setting unit 604 from the tabulation of wavelength path solution, and it is added in the wavelength path candidate list.
Utilize above-mentioned control, the IPv6 that calculates on the IPv6 network 476 flows to the optimal allocation of the wavelength path on the photonic network 401, and when considering priority and bandwidth, calculates the best route of the wavelength path on the photonic network 401.
Next, will the example that the incision light path wherein is not set be described.In example as shown in figure 24,, when skipping immediate core node, transmit all the IPv6 routes between the fringe node because the incision path is not set.For example, setting is 411 IPv6 route 458 from fringe node 407 to fringe node, by wavelength path 452, skip core node 423, by wavelength path 454, skip core node 429, by wavelength path 455, skip core node 435, by wavelength path 457 and arrive fringe node 411.As mentioned above, wavelength path 452 utilizes the connecting interface 409 of fringe node 407.Wavelength path 457 utilizes the connecting interface 413 of fringe node 411.
Setting is 419 IPv6 route 459 from fringe node 407 to fringe node, by wavelength path 452, skip core node 423, by wavelength path 454, skip core node 429, by wavelength path 455, skip core node 435, by wavelength path 456 and arrive fringe node 419.As mentioned above, wavelength path 456 utilizes the connecting interface 421 of fringe node 419.
Suppose the necessary bypass core node 429 of IPv6 route, congested because it has.Figure 25 shows the example that the incision light path is set according to these hypothesis, by conventional art.In conventional art, will cut light path and be arranged between the fringe node.With reference to Figure 25, at first,, utilize conventional art, by the connecting interface 410 of wavelength path 478 adjoining edge nodes 407 and the connecting interface 422 of fringe node 419 for IPv6 route 459 being set by the incision light path.By wavelength path 478 IPv6 route 459 is set.
Next, for IPv6 route 458 being set, the incision light path must be arranged between fringe node 407 and the fringe node 411 by the incision light path.But, owing to used whole connecting interfaces of fringe node 407, the incision light path can not be set, and keep IPv6 route 458 by core node 429.Therefore, can not avoid the congested of core node 429 places fully.
Figure 26 shows the example that the incision light path is set by the technology of present embodiment.In the present embodiment, the incision light path is arranged between fringe node and the core node.
When in the manner described above wavelength path being set, the IPv6 flow distribution of traffic carrying capacity control appliance 502/wavelength path route calculating and setting unit 604 is selected to be arranged in core node and is distributed to core node that wavelength switching system between the destination fringe node of stream of wavelength path counts minimum (promptly, select the core node of the most close destination fringe node), as wavelength path target is set.
Then, IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the wavelength swap table 515 to 519 of wavelength switching system 402 to 406 by wavelength switching control unit 606, with transmission sources fringe node that stream is set with as the wavelength path between the core node that target is set (first connects).In addition, IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided as the wavelength path (second connects) between the destination fringe node of core node that target is set and stream.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the IPv6 transmission table 523 of fringe node 407,411,415 and 419 to 526 by fringe node control unit 607, and the transfer function of control transmission source fringe node, be arranged on the transmission sources fringe node and transmit the stream of distributing to wavelength path as the wavelength path between the core node that target is set thereby utilize.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided as the IPv6 transmission table of the core node that target is set by core node control unit 608, and control, thereby transmit the stream of distributing to wavelength path to being arranged on as the wavelength path between core node that target is set and the destination fringe node as the transmitting function that the core node of target is set.
In example as shown in figure 26, at first,, the core node 435 of the most close destination fringe node 419 is elected as the core node that target is set for IPv6 route 459 being set by the incision light path.Traffic carrying capacity control appliance 502 rewrites the wavelength swap table 515 to 517 of wavelength switching system 402 to 404, so that link to each other with the connecting interface 437 of core node 435 by the connecting interface 410 of wavelength path 479 with transmission sources fringe node 407.Because wavelength path 456 has been arranged between core node 435 and the destination fringe node 419, does not need to reset wavelength path.
Next, the IPv6 that traffic carrying capacity control appliance 502 rewrites fringe node 407 transmits the IPv6 transmission table 522 of table 523, core node 435 and the IPv6 transmission table 526 of fringe node 419, so that the IPv6 route 459 by wavelength path 479, core node 435 and wavelength path 456 to be set.Transmission sources fringe node 407 is addressed to the grouping of fringe node 419 to wavelength path 479 transmission that link to each other with core node 435 according to IPv6 transmission table 523.Core node 435 is checked the IPv6 address, destination of received grouping, and transmits table 522 according to IPv6, sends it to the wavelength path 456 that links to each other with destination fringe node 419.Destination fringe node 419 receives described grouping.
Suppose IPv6 route 458 to be set by the incision light path.In this case, the core node 435 of the most close destination fringe node 411 is elected as the core node that target is set.Wavelength path 479 has been arranged between transmission sources fringe node 407 and the core node 435.Wavelength path 457 has been arranged between core node 435 and the destination fringe node 411.Therefore, do not need to reset wavelength path.
The IPv6 that traffic carrying capacity control appliance 502 rewrites core node 435 transmits table 522, so that the IPv6 route 458 by wavelength path 479, core node 435 and wavelength path 457 to be set.Transmission sources fringe node 407 is addressed to the grouping of fringe node 411 to wavelength path 479 transmission that link to each other with core node 435 according to IPv6 transmission table 523.Core node 435 is checked the IPv6 address, destination of received grouping, and transmits table 522 according to IPv6, sends it to the wavelength path 457 that links to each other with destination fringe node 411.Destination fringe node 411 receives described grouping.
Utilize above-mentioned control, IPv6 route 458 and 459 are set by incision light path through the core node of the most close destination fringe node.Even at the connecting interface number of fringe node hour, still can when avoiding having congested core node 429, be provided with.
In the present embodiment, have the fact of the connecting interface of how sub-fringe node (RE router), the incision light path is arranged between the core node of transmission sources fringe node and the most close destination fringe node by utilizing core node (electric P router).Utilize this processing, can increase incision light path number, and can minimize and have congested core node number.Utilize this technology, even there be not the fringe node number increase that connects grouping conveying network, and the connecting interface number of fringe node hour, still can increase the congested incision light path number that is provided for preventing core node, and can avoid the congested of core node.Therefore, can improve the communication quality that extensive nothing connects grouping conveying network economically, and can increase the transmission capacity economically.
The connecting interface 414 of fringe node 411 and the connecting interface 440 of core node 435 are not used.Therefore, traffic carrying capacity control appliance 502 also can rewrite the wavelength swap table 517 of wavelength switching system 404, between core node 435 and fringe node 411, the new wavelength path that utilizes connecting interface 414 and 440 is set, to reduce the load of wavelength path 457.
[the 7th embodiment]
Next, the seventh embodiment of the present invention will be described.The structure of the network model of present embodiment is identical with the 6th embodiment, and will utilize the reference number identical with Figure 20 to 23 to be described.In the 6th embodiment, only electing the core node of the most close destination fringe node as wavelength path is provided with target.Can also elect the core node of the most close transmission sources fringe node as wavelength path target is set.
Figure 27 shows the connection setting according to present embodiment.Figure 27 shows the simplified structure of network shown in Figure 20.When in the manner described above wavelength path being set, the IPv6 flow distribution of traffic carrying capacity control appliance 502/wavelength path route calculating and setting unit 604 selects to be arranged in core node and the wavelength switching system distributed between the transmission sources fringe node of stream of wavelength path is counted the core node of minimum, as wavelength path target N1 (first is provided with target) is set.In addition, IPv6 flow distribution/wavelength path route calculating and setting unit 604 is selected the core node of the most close destination fringe node, as wavelength path target N2 (second is provided with target) is set, with identical among the 6th embodiment.
Then, IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the wavelength swap table 515 to 519 of wavelength switching system 402 to 406 by wavelength switching control unit 606, to be provided as core node that target N1 is set and as the wavelength path P1 between the core node that target N2 is set (first connects).IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the transmission sources fringe node and as the wavelength path P2 (second connects) that is provided with between the core node of target N1, and as core node that target N2 is set and the wavelength path P3 between the fringe node of destination (the 3rd connects).
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the IPv6 transmission table 523 of fringe node 407,411,415 and 419 to 526 by fringe node control unit 607, and the transfer function of control transmission source fringe node, be arranged on the transmission sources fringe node and transmit the stream of distributing to wavelength path thereby utilize as the wavelength path P2 between the core node that target N1 is set.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided as the IPv6 transmission table of the core node that target N1 is set by core node control unit 608, and control is as being provided with the transmitting function of the core node of target N1, thereby transmits the stream of distributing to wavelength path as the core node that target N1 is set with as the wavelength path P1 between the core node that target N2 is set to being arranged on.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided as the IPv6 transmission table of the core node that target N2 is set by core node control unit 608, and control, thereby transmit the stream of distributing to wavelength path to being arranged on as the wavelength path P3 between core node that target N2 is set and the destination fringe node as the transmitting function that the core node of target N2 is set.
Utilize above-mentioned wavelength path setting and to the control of transmission sources fringe node and core node, the transmission sources fringe node according to IPv6 transmission table to dividing into groups with the wavelength path P2 transmission that links to each other as the core node that target N1 is set.Check the IPv6 address, destination of received grouping as the core node that target N1 is set, and transmit table, the wavelength path P1 that sends it to and link to each other as the core node that target N2 is set according to IPv6.Check the IPv6 address, destination of received grouping as the core node that target N2 is set, and, send it to the wavelength path P3 that links to each other with the destination fringe node according to IPv6 transmission table.The destination fringe node receives described grouping.
Compare with the 6th embodiment, present embodiment is suitable for its scale and becomes big network along with the increase of fringe node number, although the connecting interface number of each fringe node does not increase.As concrete means, because core node that will the most close transmission sources fringe node the and core node of close packet processing unit is as the two ends of incision light path P1, can increase can be by the connecting interface number of cutting the light path use.As a result, can increase incision light path number.Therefore, unless can avoid being provided with the incision path otherwise the IPv6 grouping will be by its core node congested.
[the 8th embodiment]
Next, the eighth embodiment of the present invention will be described.The structure of the network model of present embodiment is identical with the 6th embodiment, and will utilize the reference number identical with Figure 20 to 23 to be described.In the 7th embodiment, the core node of the core node of the most close transmission sources fringe node and the most close destination fringe node links to each other by being connected directly.Between these two core nodes, can also there be other core nodes.
Figure 28 shows the connection setting according to present embodiment.Figure 28 shows the simplified structure of network shown in Figure 20.When in the manner described above wavelength path being set, the IPv6 flow distribution of traffic carrying capacity control appliance 502/wavelength path route calculating and setting unit 604 selects to distribute to the core node among the regional A1 under the transmission sources fringe node of stream of wavelength path, as wavelength path target N11 (first is provided with target) is set.In addition, the core node among the affiliated regional A2 of the destination fringe node of stream is selected in IPv6 flow distribution/wavelength path route calculating and setting unit 604, as wavelength path target N12 (second is provided with target) is set.
The core node of the most close transmission sources fringe node is also selected in IPv6 flow distribution/wavelength path route calculating and setting unit 604, as wavelength path target N13 (the 3rd is provided with target) is set, and the core node of selecting the most close destination fringe node, as wavelength path target N14 (the 4th is provided with target) is set, with identical among the 7th embodiment.
Then, IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the wavelength swap table 515 to 519 of wavelength switching system 402 to 406 by wavelength switching control unit 606, to be provided as core node that target N11 is set and as the wavelength path P11 between the core node that target N12 is set (first connects), transmission sources fringe node and as the wavelength path P12 (second connects) that is provided with between the core node of target N13, as the core node that target N13 is set with as the wavelength path P13 between the core node that target N11 is set (the 3rd connects), as the wavelength path P14 between core node that target N14 is set and the destination fringe node (the 4th connects), and as the core node that target N12 is set with as the wavelength path P15 between the core node that target N14 is set (the 5th connects).
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided with the IPv6 transmission table 523 of fringe node 407,411,415 and 419 to 526 by fringe node control unit 607, and the transfer function of control transmission source fringe node, be arranged on the transmission sources fringe node and transmit the stream of distributing to wavelength path thereby utilize as the wavelength path P12 between the core node that target N13 is set.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is provided as the IPv6 transmission table of the core node that target N13 is set by core node control unit 608, and control is as being provided with the transmitting function of the core node of target N13, thereby transmits the stream of distributing to wavelength path as the core node that target N13 is set with as the wavelength path P13 between the core node that target N11 is set to being arranged on.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 also is provided as the IPv6 transmission table of the core node that target N11 is set by core node control unit 608, and control is as being provided with the transmitting function of the core node of target N11, thereby transmits the stream of distributing to wavelength path as the core node that target N11 is set with as the wavelength path P11 between the core node that target N12 is set to being arranged on.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 also is provided as the IPv6 transmission table of the core node that target N12 is set by core node control unit 608, and control is as being provided with the transmitting function of the core node of target N12, thereby transmits the stream of distributing to wavelength path as the core node that target N12 is set with as the wavelength path P15 between the core node that target N14 is set to being arranged on.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 also is provided as the IPv6 transmission table of the core node that target N14 is set by core node control unit 608, and control, thereby transmit the stream of distributing to wavelength path to being arranged on as the wavelength path P14 between core node that target N14 is set and the destination fringe node as the transmitting function that the core node of target N14 is set.
Utilize above-mentioned wavelength path setting and to the control of transmission sources fringe node and core node, the transmission sources fringe node according to IPv6 transmission table to dividing into groups with the wavelength path P12 transmission that links to each other as the core node that target N13 is set.Check the IPv6 address, destination of received grouping as the core node that target N13 is set, and transmit table, the wavelength path P13 that sends it to and link to each other as the core node that target N11 is set according to IPv6.Check the IPv6 address, destination of received grouping as the core node that target N11 is set, and transmit table, the wavelength path P11 that sends it to and link to each other as the core node that target N12 is set according to IPv6.
Check the IPv6 address, destination of received grouping as the core node that target N12 is set, and transmit table, the wavelength path P15 that sends it to and link to each other as the core node that target N14 is set according to IPv6.Check the IPv6 address, destination of received grouping as the core node that target N14 is set, and, send it to the wavelength path P14 that links to each other with the destination fringe node according to IPv6 transmission table.The destination fringe node receives described grouping.
Compare with the 7th embodiment, present embodiment is suitable for its scale and becomes big network along with the increase of fringe node number, although the connecting interface number of each fringe node does not increase.As concrete means, the zone that comprises fringe node and core node will be divided on the cellular logic.In each zone, carried out after the IPv6 route incision light path being set between the core node in each zone.Therefore, a plurality of incision light paths can be set between the zone, can increase can be by the connecting interface number of incision light path use.The connecting interface number that incision light path number equals the core node number * core node in the zone can be set.As a result, can increase incision light path number.Therefore, unless can avoid being provided with the incision path otherwise the IPv6 grouping will be by its core node congested.
[the 9th embodiment]
In the 8th embodiment, as shown in figure 28, the core node that target N11 is set as core node that target N13 is set and conduct links to each other by being connected directly.Similarly, the core node of target N14 is set by being connected direct linking to each other as core node that target N12 is set and conduct.On the contrary, the core node that belongs to same area can and be connected continuous by at least one core node.
Figure 29 shows the block diagram according to the connection setting of present embodiment.Identical assembly in the reference number presentation graphs 29 identical with Figure 28.In example shown in Figure 29, belong to regional A1, as the core node that target N13 is set and as the core node that target N11 is set by a plurality of core node N15 be connected continuous.In addition, belong to regional A2, as the core node that target N14 is set and as the core node that target N12 is set by a plurality of core node N16 be connected continuous.
[the tenth embodiment]
In the 6th to the 9th embodiment, each core node can be recorded as the bandwidth of stream by the transmission sources address of the stream of each institute's transmission and the destination-address statistical information to defined each stream, and the statistical information that is write down is notified to traffic carrying capacity control appliance 502.For example, core node is provided with at interval from traffic carrying capacity control appliance 502 reception notifications, and carries out the record and the notice of statistical information with reporting interval.
The statistical information collector unit 601 of traffic carrying capacity control appliance 502 is from core node statistics collection information, and to the collected information of statistical information administrative unit 602 transmission.Statistical information administrative unit 602 is analyzed the statistical information of collecting from core, and the tabulation of establishment/renewal stream.Each clauses and subclauses of stream tabulation comprise transmission sources IPv6 address, IPv6 address, destination and IPv6 stream bandwidth.Send described stream tabulation to IPv6 flow distribution/wavelength path route calculating and setting unit 604.
IPv6 flow distribution/wavelength path route calculating and setting unit 604 is by the definite wavelength path that will be provided with of the method described in the 6th embodiment.In wavelength path is set, when the summation that detects the bandwidth by stream by stream tabulation surpasses the core node of predetermined threshold, wavelength path is set by described core node.
In the present embodiment, owing to be provided with the threshold value of bandwidth, can connection be set according to the traffic carrying capacity state, thereby avoid congested on one's own initiative.
Industrial applicability
The present invention can be applied to the grouping conveying network system.

Claims (25)

1, a kind of block communication method, utilization links to each other with network and transmits a plurality of packet transfer devices of comprising the lower-level frame that encapsulates upper-layer packet, lower-level frame is carried out at least one frame transfer device of intermediary and link to each other with frame transfer device with packet transfer device and by send the network comtrol server that the communicate by letter route of lower-level frame in network controlled in instruction to packet transfer device and frame transfer device, it is characterized in that in the transmission between the packet transfer device by network
Described packet transfer device comprises:
The extraction process, the lower-layer addresses that extracts the transmission sources address that comprises low layer and destination-address from received lower-level frame is right;
First registration process is registered in the transmission destination of received lower-level frame in first form at each corresponding target way address;
The first counter process, at each right type of lower-layer addresses, the right quantity of lower-layer addresses that counting is extracted by the extraction process; And
The first transmission process, the lower-layer addresses of being counted by the first counter process to described frame transfer device transmission expression is to surpassing the first information of predetermined threshold in the given time;
Described frame transfer device comprises:
Second registration process is registered in the transmission destination of received lower-level frame in second form that is included in each destination-address in the lower-level frame;
The second counter process, at each the right type of lower-layer addresses that is included in from the first information that described packet transfer device receives, the quantity of the lower-level frame that counting is transmitted; And
The second transmission process, the lower-layer addresses of being counted by the second counter process to described network comtrol server transmission expression is to surpassing second information of predetermined threshold in the given time; And
Described network comtrol server comprises:
Calculation procedure when receiving second information, extracts transmission sources address and destination-address from second information, and carry out to calculate, so that the communication routing optimization in the network, between transmission sources address and the destination-address; And
The change process according to result of calculation, changes the registration of the transmission destination that is registered in the lower-level frame in first form and second form.
2, block communication method according to claim 1, it is characterized in that the time to the frame transfer device transmission first information, the right transmission sources address transfer of the lower-layer addresses of the first transmission process in being included in the first information be included in frame information in destination-address and with the relevant information of the corresponding upper strata of destination-address destination-address.
3, block communication method according to claim 1 is characterized in that described frame transfer device also comprises the counting treatment progress, and any lower-layer addresses that does not increase in the given time according to the count value of the counting deletion second counter process is to clauses and subclauses.
4, block communication method according to claim 1 is characterized in that also comprising:
Adding to as the termination function unit and connect in the network and be structured in logic in the nothing connection grouping conveying network that comprises on transmission link with connection multiplexing transfer function and the connection network by being connected packet communicate terminal with nothing with the connection switching node that is connected function of exchange as the connectionless packet transfer node of frame transfer device as packet transfer device, when carrying out when being connected arrangement according to the traffic carrying capacity bandwidth that do not have to connect grouping conveying network and traffic carrying capacity priority
Do not connect the notification process that packet communicate terminal is carried out by having, record comprises by the transmission packets source address that do not have to connect institute's transmission in the packet communicate terminal and destination-address the bandwidth of defined each stream and the statistical information of priority, and the statistical information that is write down is notified to traffic carrying capacity control appliance as network comtrol server; And
Stream list creating process by the execution of traffic carrying capacity control appliance, make the traffic carrying capacity control appliance according to not connecting the statistical information that packet communicate terminal sends over, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address, priority and bandwidth at each stream from having.
5, block communication method according to claim 4 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Stream list ordering process sorts according to the descending convection current tabulation of priority, according to the descending of bandwidth to having the line ordering that flows to of equal priority; And
Connect candidate list and create process, the transmission sources of supposing each stream in being registered in the stream tabulation of sorting does not have the packet communicate terminal of connection and destination and does not have between the packet communicate terminal of connection and be provided with connection, begin the connection order of candidates is distributed to all streams by uppermost stream from the stream tabulation, create the connection candidate list.
6, block communication method according to claim 5, it is characterized in that described connection candidate list creates process and do not have and connect packet communicate terminal, identical destination and do not have one the flow distribution of being no less than that connects packet communicate terminal and equal priority and give the identical candidate that is connected by having the identical traffic source, and the summation that makes bandwidth is no more than the capacity that connects the candidate, and determine to be connected candidate's priority and bandwidth according to the summation of the priority of the stream that is distributed and bandwidth, create and connect candidate list.
7, block communication method according to claim 5 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Connect candidate list ordering process, sort to connecting candidate list, the connection candidate with equal priority is sorted according to the descending of bandwidth according to the descending of priority; And
The reservation process, uppermost connection candidate begins from the connection candidate list that sorts, keeps the connecting interface that does not have the connection packet communicate terminal for being included in all the connection order of candidates that connect in the candidate list that sort.
8, block communication method according to claim 7 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
The selection process according to by connecting the candidate list ordering connection candidate list that process sorted, is selected the connection that need not to be provided with from wherein register the connection solution tabulation that the connection that will be provided with is arranged;
Process relatively, having sorted connects in the candidate list, for its reservation is that possible connection candidate is set to the connection candidate as processing target, and will compare with bandwidth and selected the connection as the connection candidate's of processing target priority;
Connect solution list creating/renewal process, when the priority as the connection candidate of processing target is higher than the priority of selected connection and as the connection candidate's of processing target bandwidth during greater than the bandwidth of selected connection, from connect candidate list, get rid of connection candidate as processing target, and the connection candidate as processing target added to connect in the solution tabulation, and from connect the solution tabulation, get rid of selected connection, and selected connection is added in the connection candidate list; And
Forbidding connects the tabulation registration process, when the priority as the connection candidate of processing target is lower than the priority of selected connection and as the connection candidate's of processing target bandwidth during less than the bandwidth of selected connection, perhaps when identical as the priority of the connection candidate's of processing target priority and selected connection and as the connection candidate's of processing target bandwidth when identical with the selected bandwidth that is connected, to be registered in forbidding as the connection candidate of processing target connects in the tabulation
Wherein said relatively process is among the possible connection candidate, unregisteredly connects uppermost connection candidate in the tabulation at forbidding and be set to connection candidate as processing target for its reservation.
9, block communication method according to claim 7 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
The selection process according to by connecting the candidate list ordering connection candidate list that process sorted, is selected the connection that need not to be provided with from wherein register the connection solution tabulation that the connection that will be provided with is arranged;
Process relatively, having sorted connects in the candidate list, for its reservation is that possible connection candidate is set to the connection candidate as processing target, and will compare with bandwidth and selected the connection as the connection candidate's of processing target priority;
Connect solution list creating/renewal process, when the priority as the connection candidate of processing target is higher than the priority of selected connection and as the connection candidate's of processing target bandwidth during greater than the bandwidth of selected connection, from connect candidate list, get rid of connection candidate as processing target, and the connection candidate as processing target added to connect in the solution tabulation, and from connect the solution tabulation, get rid of selected connection, and selected connection is added in the connection candidate list;
Forbidding connects the tabulation registration process, will be recorded in forbidding with the current execution number of times that compares process as the connection candidate of processing target and connect in the tabulation; And
Forbidding connects the tabulation deletion process, connects the connection candidate that deletion the tabulation is write down with the execution number of times little than the current execution number of times of process frequently from forbidding,
Wherein said relatively process is among the possible connection candidate, unregisteredly connects uppermost connection candidate in the tabulation at forbidding and be set to connection candidate as processing target for its reservation.
10, block communication method according to claim 8 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
The route calculation procedure, uppermost connection is calculated route when transmission sources does not have the packet communicate terminal of connection and destination and do not have between the packet communicate terminal of connection in connecting the solution tabulation;
Connect the process that is provided with, in the time can guaranteeing to transmit the required transfer resource of uppermost connection in the transmission link on the route of being calculated, the function of exchange of control connection switching node, so that uppermost connection to be set, the transmission sources of control flows does not have the connection packet communicate terminal, utilizing described connection transmission to distribute to the stream of uppermost connection, and from connect the solution tabulation, get rid of uppermost connection; And
Connection solution tabulation deletion process in the time can not guaranteeing transfer resource, is got rid of uppermost connection, and uppermost connection is added in the connection candidate list from connect the solution tabulation.
11, block communication method according to claim 9 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
The route calculation procedure, uppermost connection is calculated route when transmission sources does not have the packet communicate terminal of connection and destination and do not have between the packet communicate terminal of connection in connecting the solution tabulation;
Connect the process that is provided with, in the time can guaranteeing to transmit the required transfer resource of uppermost connection in the transmission link on the route of being calculated, the function of exchange of control connection switching node, so that uppermost connection to be set, the transmission sources of control flows does not have the connection packet communicate terminal, utilizing described connection transmission to distribute to the stream of uppermost connection, and from connect the solution tabulation, get rid of uppermost connection; And
Connection solution tabulation deletion process in the time can not guaranteeing transfer resource, is got rid of uppermost connection, and uppermost connection is added in the connection candidate list from connect the solution tabulation.
12, block communication method according to claim 10, it is characterized in that when connecting the solution tabulation for sky, when can not be when being registered in any connection candidate who connects in the candidate list and keeping connecting interface, perhaps when can not be when being registered in any connection that connects in the solution tabulation and guaranteeing transfer resource, finish any of first process group or second process group, wherein said first process group comprises stream list ordering process, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, the route calculation procedure, connect the process that is provided with and be connected solution tabulation deletion process, described second process group comprises stream list ordering process, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, forbidding connects the tabulation deletion process, the route calculation procedure, connect the process that is provided with and be connected solution tabulation deletion process.
13, block communication method according to claim 11, it is characterized in that when connecting the solution tabulation for sky, when can not be when being registered in any connection candidate who connects in the candidate list and keeping connecting interface, perhaps when can not be when being registered in any connection that connects in the solution tabulation and guaranteeing transfer resource, finish any of first process group or second process group, wherein said first process group comprises stream list ordering process, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, the route calculation procedure, connect the process that is provided with and be connected solution tabulation deletion process, described second process group comprises stream list ordering process, connect candidate list and create process, connect candidate list ordering process, the reservation process, the selection process, compare process, connect solution list creating/renewal process, forbidding connects the tabulation registration process, forbidding connects the tabulation deletion process, the route calculation procedure, connect the process that is provided with and be connected solution tabulation deletion process.
14, block communication method according to claim 4 is characterized in that also comprising that the reporting interval of being carried out by the traffic carrying capacity control appliance is provided with process, makes the reporting interval that the traffic carrying capacity control appliance is provided with does not have the statistical information that connects packet communicate terminal,
Wherein said notification process is according to the statistical information of each stream of the received grouping of set reporting interval record, and statistical information is notified to the traffic carrying capacity control appliance, and
Stream list creating process is upgraded the stream tabulation according to not connecting the statistical information that packet communicate terminal sends over from having.
15, block communication method according to claim 4 is characterized in that also comprising that the threshold value of being carried out by the traffic carrying capacity control appliance is provided with process, makes the traffic carrying capacity control appliance that the threshold value of the bandwidth of not having each stream that connects packet communicate terminal is set,
Wherein notification process writes down the statistical information of each stream of received grouping, and when the bandwidth of the stream that is write down surpassed set threshold value, the statistical information that its bandwidth is surpassed the stream of threshold value was notified to the traffic carrying capacity control appliance, and
Stream list creating process is upgraded the stream tabulation according to not connecting the statistical information that packet communicate terminal sends over from having.
16, block communication method according to claim 1 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Adding to as the termination function unit and connect in the network and be structured in logic in the nothing connection grouping conveying network that comprises on transmission link with connection multiplexing transfer function and the connection network by being connected packet communicate terminal with nothing with the connection switching node that is connected function of exchange as the connectionless packet transfer node of frame transfer device as packet transfer device, when will be when do not have connecting between the packet communicate terminal executive communication
Transmission node is selected process, and the connection switching node of selecting to be arranged in connectionless packet transfer node and receive the destination of dividing into groups not have between the connection packet communicate terminal is counted the connectionless packet transfer node of minimum, as connection target is set;
First connects process is set, and makes the control appliance control connection switching node as network comtrol server, does not have the packet communicate terminal of connection and connects as first between the connectionless packet transfer node that target is set so that transmission transmission packets source to be set; And
Second connection is provided with process, makes control appliance control connection switching node, does not have second connection that connects between the packet communicate terminal to be provided as connectionless packet transfer node and destination that target is set.
17, block communication method according to claim 16 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, connects to utilize first, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination; And
Transmission is provided with process, makes control appliance control as the connectionless packet transfer node that target is set, and does not have the connection packet communicate terminal to the second connection transmission from transmission sources and does not have the grouping that connects packet communicate terminal to the destination.
18, block communication method according to claim 1 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Adding to as the termination function unit and connect in the network and be structured in logic in the nothing connection grouping conveying network that comprises on transmission link with connection multiplexing transfer function and the connection network by being connected packet communicate terminal with nothing with the connection switching node that is connected function of exchange as the connectionless packet transfer node of frame transfer device as packet transfer device, when will be when do not have connecting between the packet communicate terminal executive communication
First transmission node is selected process, and the connection switching node of selecting to be arranged in connectionless packet transfer node and transmit the transmission packets source not have between the connection packet communicate terminal is counted the connectionless packet transfer node of minimum, connects as first target is set;
Second transmission node is selected process, and the connection switching node of selecting to be arranged in connectionless packet transfer node and receive the destination of dividing into groups not have between the connection packet communicate terminal is counted the connectionless packet transfer node of minimum, connects as second target is set;
First connects the process that is provided with, make the control appliance control connection switching node as network comtrol server, the connectionless packet transfer node of target is set and first between the connectionless packet transfer node of target is set and connect as second to be provided as first;
Second connects process is set, and makes control appliance control connection switching node, does not have to connect packet communicate terminal and as first second between the connectionless packet transfer node of target is set and connects so that transmission sources to be set; And
The 3rd connection is provided with process, makes control appliance control connection switching node, does not have the 3rd connection that connects between the packet communicate terminal to be provided as second connectionless packet transfer node and the destination that target is set.
19, block communication method according to claim 18 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, connects to utilize second, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination;
First transmits process is set, and makes control appliance control as first connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to first to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; And
Second transmits process is set, and makes control appliance control as second connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 3rd to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination.
20, block communication method according to claim 1 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Adding to as the termination function unit and connect in the network and be structured in logic in the nothing connection grouping conveying network that comprises on transmission link with connection multiplexing transfer function and the connection network by being connected packet communicate terminal with nothing with the connection switching node that is connected function of exchange as the connectionless packet transfer node of frame transfer device as packet transfer device, when will be when do not have connecting between the packet communicate terminal executive communication
First transmission node is selected process, selects transmission transmission packets source not have the connectionless packet transfer node that connects in the affiliated first area of packet communicate terminal, connects as first target is set;
Second transmission node is selected process, and the destination of selective reception grouping does not have the connectionless packet transfer node that connects in the affiliated second area of packet communicate terminal, connects as second target is set;
The 3rd transmission node is selected process, selects to be arranged in connectionless packet transfer node and transmission sources and does not have the connection switching node that connects between the packet communicate terminal and count the connectionless packet transfer node of minimum, connects as the 3rd target is set;
The 4th transmission node is selected process, selects to be arranged in connectionless packet transfer node and destination and does not have the connection switching node that connects between the packet communicate terminal and count the connectionless packet transfer node of minimum, connects as the 4th target is set;
First connects the process that is provided with, make the control appliance control connection switching node as network comtrol server, the connectionless packet transfer node of target is set and first between the connectionless packet transfer node of target is set and connect as second to be provided as first;
Second connects process is set, and makes control appliance control connection switching node, does not have to connect packet communicate terminal and as the 3rd second between the connectionless packet transfer node of target is set and connects so that transmission sources to be set;
The 3rd connects process is set, and makes control appliance control connection switching node, the connectionless packet transfer node of target is set and as first the 3rd connection that is provided with between the connectionless packet transfer node of target to be provided as the 3rd;
The 4th connection is provided with process, makes control appliance control connection switching node, does not have the 4th connection that connects between the packet communicate terminal to be provided as the 4th connectionless packet transfer node and the destination that target is set; And
The 5th connects process is set, and makes control appliance control connection switching node, the connectionless packet transfer node of target is set and as the 4th the 5th connection that is provided with between the connectionless packet transfer node of target to be provided as second.
21, block communication method according to claim 20 is characterized in that also comprising the following process of being carried out by the traffic carrying capacity control appliance:
Transmission is provided with process, makes control appliance control transmission source not have the connection packet communicate terminal, connects to utilize second, and transmission does not have the connection packet communicate terminal from transmission sources and do not have the grouping that connects packet communicate terminal to the destination;
First transmits process is set, and makes control appliance control as the 3rd connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 3rd to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination;
Second transmits process is set, and makes control appliance control as first connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to first to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination;
The 3rd transmits process is set, and makes control appliance control as second connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 5th to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination; And
The 4th transmits process is set, and makes control appliance control as the 4th connectionless packet transfer node that target is set, and connects to transmit not have from transmission sources to the 4th to connect packet communicate terminal and do not have the grouping that connects packet communicate terminal to the destination.
22, block communication method according to claim 20, it is characterized in that being arranged in the first area, as the 3rd connectionless packet transfer node that target is set with link to each other with being connected by a plurality of connectionless packet transfer nodes that are arranged in the first area as first connectionless packet transfer node that target is set; And be arranged in second area, as the 4th connectionless packet transfer node that target is set with link to each other with being connected by a plurality of connectionless packet transfer nodes that are arranged in second area as second connectionless packet transfer node that target is set.
23, block communication method according to claim 16 is characterized in that also comprising:
Notification process by the connectionless packet transfer node execution, record is by the transmission packets source address of institute's transmission in the connectionless packet transfer node and the destination-address bandwidth to defined each stream, as statistical information, and the statistical information that is write down is notified to control appliance; And
Stream list creating process by the execution of traffic carrying capacity control appliance, make control appliance according to the statistical information that sends over from connectionless packet transfer node, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address and bandwidth at each stream
Wherein when in connection is set, when the summation that detects the bandwidth by stream by the stream tabulation surpasses the connectionless packet transfer node of predetermined threshold, the connection without connectionless packet transfer node is set.
24, block communication method according to claim 18 is characterized in that also comprising:
Notification process by the connectionless packet transfer node execution, record is by the transmission packets source address of institute's transmission in the connectionless packet transfer node and the destination-address bandwidth to defined each stream, as statistical information, and the statistical information that is write down is notified to control appliance; And
Stream list creating process by the execution of traffic carrying capacity control appliance, make control appliance according to the statistical information that sends over from connectionless packet transfer node, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address and bandwidth at each stream
Wherein when in connection is set, when the summation that detects the bandwidth by stream by the stream tabulation surpasses the connectionless packet transfer node of predetermined threshold, the connection without connectionless packet transfer node is set.
25, block communication method according to claim 20 is characterized in that also comprising:
Notification process by the connectionless packet transfer node execution, record is by the transmission packets source address of institute's transmission in the connectionless packet transfer node and the destination-address bandwidth to defined each stream, as statistical information, and the statistical information that is write down is notified to control appliance; And
Stream list creating process by the execution of traffic carrying capacity control appliance, make control appliance according to the statistical information that sends over from connectionless packet transfer node, create the stream tabulation of wherein having registered the information that comprises transmission sources address, destination-address and bandwidth at each stream
Wherein when in connection is set, when the summation that detects the bandwidth by stream by the stream tabulation surpasses the connectionless packet transfer node of predetermined threshold, the connection without connectionless packet transfer node is set.
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