WO2007026733A1 - ネットワークシステム、サーバ、品質劣化箇所推定方法及びプログラム - Google Patents
ネットワークシステム、サーバ、品質劣化箇所推定方法及びプログラム Download PDFInfo
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- WO2007026733A1 WO2007026733A1 PCT/JP2006/317049 JP2006317049W WO2007026733A1 WO 2007026733 A1 WO2007026733 A1 WO 2007026733A1 JP 2006317049 W JP2006317049 W JP 2006317049W WO 2007026733 A1 WO2007026733 A1 WO 2007026733A1
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- 230000015556 catabolic process Effects 0.000 claims description 361
- 238000006731 degradation reaction Methods 0.000 claims description 361
- 230000006866 deterioration Effects 0.000 claims description 18
- 239000000284 extract Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 44
- 230000008569 process Effects 0.000 description 79
- 230000006870 function Effects 0.000 description 43
- 238000010586 diagram Methods 0.000 description 32
- 238000007796 conventional method Methods 0.000 description 11
- 238000007726 management method Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/11—Identifying congestion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L41/5003—Managing SLA; Interaction between SLA and QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L41/508—Network service management, e.g. ensuring proper service fulfilment according to agreements based on type of value added network service under agreement
- H04L41/5087—Network service management, e.g. ensuring proper service fulfilment according to agreements based on type of value added network service under agreement wherein the managed service relates to voice services
Definitions
- the present invention relates to a network system, and more particularly to a network system that estimates a degradation point of communication quality.
- Non-Patent Document 1 Collects flow quality / routed link table that collects the quality information of the communication flow through the network and the routing information of the network, and associates the quality of each communication flow with the route link (route) through which the communication flow passes.
- the quality degradation point is estimated by using the minimum link number estimation method. The following describes an example of the method for estimating the quality degradation location in this network.
- FIG. 46 is a network configuration diagram. As shown in FIG. 46, routers (or switches) R1-1 to R16 are arranged in the network, and terminals T1 1 to T1 23 are connected to the routers (or switches).
- Quality degradation point estimation server SA1 is connected to router (or switch) R1-1.
- the quality degradation location estimation server SA1 estimates the location of a network with degraded quality based on the quality information for each communication flow collected from the terminals ⁇ 1-1 to ⁇ 1-23 and the route information obtained by the router or switch.
- a link is a link between routers (or switches), between a router (or switch) and a terminal, and has a one-way communication direction (directed link).
- Figure 47 shows an example of directed link names (links L1 1 to L1-86) in the network configuration diagram of Fig. 46.
- the quality of the flows F2, F5, F6, F9, F10, F11 has deteriorated
- the quality of the other flows Fl, F3, F4, F7, F8
- the flow quality / routed link table is as shown in Figure 49.
- the flow F1 passes through the links L1-1, Ll-28, Ll-56, L1—62, L1—63, L1—86, the flow F1 row in the flow quality / via link table shown in FIG.
- Figure 49 shows the flow quality / routed link shown in Figure 50. It looks like a table.
- any transit link of each flow must be routed by a link set composed of the union of transit links through which each flow passes.
- the number of via links that make up the link set through which any via link of each flow is routed takes the minimum value as a degraded location.
- flows F5 and F6 pass through ⁇ L1-17 ⁇
- flows F2 and F9 pass through ⁇ L1–52 ⁇
- flows ⁇ L1—59 ⁇ Since F10 and F11 are routed, each of the flow links F2, F5, F6, F9, F10, and F11 is always filled, and any of these route links is always filled.
- the minimum number of links is 3. Therefore, the three links ⁇ LI 17, LI-52, LI-59 ⁇ are estimated as the degradation points in the network.
- Patent Document 1 JP 2002-271392 A
- Non-Patent Document 1 IEICE Technical Report TM—2004—107 “Network Quality Degradation Location Estimation Method from Flow Quality Information”
- An object of the present invention is to solve the above-described drawbacks of the prior art, and in a large-scale network, based on flow quality information and routing information, a network system for estimating a quality degradation point with high accuracy and high speed,
- the purpose is to provide a server, a quality degradation point estimation method, and a program.
- the present invention provides a network system for collecting flow quality information and routing information on a network, wherein the network system collects each of a plurality of partial networks constituting the network. Based on the quality information and the routing information of the flow that passes through the partial network, the flow that passes through the route that deteriorates the quality. And a means for estimating a route whose quality is degraded on the network by merging quality information about the extracted flows in the partial network with the entire network. And
- the present invention for achieving the above object is a path without quality deterioration when a flow without quality deterioration passes even if a flow with quality deterioration passes.
- the internal flow that passes only through each of the partial networks and the external flow that passes through the plurality of partial networks are extracted from among the flows that pass through a route with degraded quality, and
- a union of an internal flow that is not a non-shared internal flow and a path whose quality is estimated to be degraded based on the external flow is defined as the net.
- estimating the quality on the workpiece is deteriorated.
- the present invention for achieving the above-described object provides a path through which a quality-degraded flow passes, even when a flow without quality degradation passes.
- the internal flow that passes only through each of the partial networks and the flow that passes through the plurality of partial networks are extracted from among the flows that pass through the route that has degraded quality.
- the quality information about the flow that passes through the partial network is merged for each flow that is identified based on the routing information, and a path that is estimated to have degraded quality for each of the internal flows, Estimate the union of quality on the network from the union of the paths that are estimated to have degraded quality for the flow that passes through the partial network. It is characterized in.
- the present invention for achieving the above object does not cause quality degradation when a flow without quality degradation passes through a path through which a flow with degraded quality passes.
- the internal route that passes only through each of the partial networks is extracted from the flows that pass through the route that has degraded quality, and the first route that has degraded quality is estimated for the internal flow.
- the route passes through a path with degraded quality, and before all the partial networks that pass through it.
- the first external flow that does not pass through the first route is extracted, and the quality information about the first external flow is merged across the entire network for each flow that is identified based on the routing information.
- the second path whose quality is deteriorated for the first external flow is estimated, and the external flow passes through the plurality of partial networks. And extracting a second external flow that passes through a route with degraded quality and that passes through at least one of the first routes of all the partial networks that pass through the second external flow.
- the second external flow For the external flow having one external flow and the second external flow, in the partial network having the second external flow, the second external flow And estimating the third route whose quality is degraded based on the information of the internal flow, and on the network by the union of the first route, the second route and the third route. It is characterized by estimating the above-mentioned route where the quality deteriorates and V.
- the quality degradation location estimation processing according to the present invention divides the entire network into partial networks, and each partial network provides flow quality information and routing information regarding the flow that passes through each partial network. By collecting, network information can be distributed and processed in parallel.
- the estimation process of the quality degradation location allows each partial network to perform a distributed and parallel process for the process of extracting a flow passing through a path with degraded quality. Can do.
- the entire network is divided into partial networks, and the collection load for the network information is collected by collecting the flow quality information and the routing information regarding the flows that pass through the respective partial networks. Can be distributed and processed in parallel, so that the processing time for flow quality processing can be reduced.
- the process of extracting a flow that passes through a path with degraded quality can be distributed and processed in parallel in each partial network, so that it is possible to estimate the quality degradation location. Powerful processing time can be reduced.
- FIG. 1 is a network configuration diagram according to a first embodiment of the present invention.
- FIG. 2 is an internal configuration diagram of a partial network quality degradation location estimation server according to the first embodiment.
- FIG. 3 is an explanatory diagram of a directed link in the network configuration diagram according to the first embodiment.
- FIG. 4 is a diagram showing an example of a flow of the first embodiment.
- FIG. 5 A flow quality Z link table of the partial network N1 of the first embodiment.
- FIG. 6 is a link table via the flow quality Z of the partial network N2 of the first embodiment.
- FIG. 7 A flow quality Z link table of the partial network N3 of the first embodiment.
- FIG. 8 is a flow quality Z link table after the non-degraded link removal processing of the partial network N1 of the first embodiment.
- FIG. 9 A flow quality Z link table after the non-degraded link removal processing of the partial network N2 of the first embodiment.
- FIG. 10 is a flow quality Z link table after non-degraded link removal processing of the partial network N3 of the first embodiment.
- FIG. 11 is a block diagram showing a hardware configuration of a partial network quality degradation location estimation server S 1 according to the first embodiment.
- FIG. 12 is an internal configuration diagram of the overall network quality degradation location estimation server of the first embodiment.
- FIG. 13 is a merged flow quality Z link tape according to the first embodiment.
- FIG. 14 is a flowchart showing an operation of the partial network quality degradation location estimation server S 1 according to the first embodiment.
- FIG. 15 is a flowchart explaining in detail the processing of the non-degraded link removal processing unit S15 of the first embodiment.
- FIG.16 Shows the operation of all network quality degradation location estimation server SA1 of the first embodiment. It is a flowchart.
- FIG. 17 is a flowchart explaining in detail the processing of the table processing unit SA12 of the first embodiment.
- FIG. 18 is an internal configuration diagram of the partial network quality degradation location estimation server according to the second exemplary embodiment of the present invention.
- FIG. 19 is an internal block diagram of the overall network quality degradation point estimation server of the second embodiment.
- ⁇ 20 This is a flowchart showing the operation of the partial network quality degradation location estimation server S1 in the second embodiment.
- FIG. 24 is a diagram showing an example of a flow for explaining the second embodiment.
- FIG. 25 is a link table via the flow quality Z of the partial network N1 in the second embodiment.
- FIG. 26 is a flow quality Z link table of the partial network N2 in the second embodiment.
- FIG. 27 is a link table via the flow quality Z of the partial network N3 in the second embodiment.
- FIG. 28 is a flow quality Z link table after local block extraction processing of the partial network N1 in the second embodiment.
- FIG. 29 is a flow quality Z link table after local block extraction processing of the partial network N2 in the second embodiment.
- FIG. 30 is a flow quality Z link table after local block extraction processing of the partial network N3 in the second embodiment.
- FIG. 31 is a flow quality Z link table regarding an external block subjected to merge processing in the second embodiment.
- ⁇ 34 A flowchart illustrating in detail the process (internal flow limited estimation process) of the partial quality degradation point estimation unit S17 in the third embodiment.
- FIG. 36 is a flow quality Z-routed link table after the internal flow limited estimation processing of the partial network N1 in the third embodiment.
- FIG. 37 is a flow quality Z-routed link table after the internal flow limited estimation process of the partial network N2 in the third embodiment.
- FIG. 38 is a flow quality Z link table after the internal flow limited estimation process of the partial network N3 in the third embodiment.
- FIG. 40 is an internal block diagram of a partial network quality degradation location estimation server according to the fourth exemplary embodiment of the present invention.
- FIG. 41 is an internal block diagram of an overall network quality degradation location estimation server according to the fourth embodiment.
- ⁇ 42 This is a flowchart showing an example of the operation of the partial network quality degradation location estimation server S1 in the fourth embodiment.
- FIG. 43 is a flowchart showing the operation of the entire network quality degradation point estimation server SA1 in the fourth embodiment.
- FIG. 44 is a flow quality Z-routed link table for explaining the re-estimation process in the partial network N 2 according to the fourth embodiment.
- FIG. 45 is a flow quality Z link table explaining re-estimation processing in the partial network N3 according to the fourth embodiment.
- FIG. 46 is a network configuration diagram for explaining the prior art.
- FIG. 47 is an explanatory diagram of a directed link.
- FIG. 48 is a diagram showing an example of a flow for explaining a conventional technique.
- FIG.50 Flow quality Z link table after non-degraded link removal processing by the conventional method.
- FIG. 1 shows a network configuration diagram according to the first embodiment of the present invention.
- network 100 is configured by partial networks N1 to N3 each surrounded by a thick dotted line.
- routers (or switches) R1-1 — R1—5 are arranged, and in the partial network N2, the router (alui is a switch) 1 ⁇ 2—1 to 1 ⁇ 2-4 Arranged, partial network N3 has routers (or switches) R3—1 to R3—7, and router (or switch) R3-1—is a router (is! / Is a switch) R1—1 And by connecting to the router (or switch) R2-1, the partial network N3 is connected to the partial networks Nl and N2 to form the network 100.
- the router (or switch) R1-1 is connected to the router (or switch) R1-2, Rl-3, R1-4, and the router (or switch) R1-3 Is connected to the router (or switch) Rl—1, Rl-2, Rl-4, R1—5, and the router (or switch) R1—2 is equipped with terminals Tl—1, T1—2, and the router (Or switch) Terminals T1-3 and T1-4 under R1-3 and routers (or switches) R1-4 have terminals T1-5 and T1-6, and routers (or switches) R1-5 Subordinate terminals T1-7 and T1 8 are provided.
- router (or switch) R1-1 is connected to the entire network quality degradation location estimation server SA1, and the router (or switch) R1-2 is connected to the partial network quality degradation location estimation server S1. .
- the partial network N2 includes a router (or switch) R2-1, a router (or Is connected to R2—2, R2-3, R2—4 and router (or switch) R2—3 is connected to router (or switch) R2-1—R2-2, R2—4 to router ( Or switch) Terminals T2-1 and T2-2 are installed under R2-2, and routers (are! / Are switches) Terminals T2-3 and T2-4 are installed under routers R2-3 and routers (or switches) ) Terminals T2-5 to T2-7 are provided under R2-4.
- router (or switch) R2-4 is connected to the partial network quality degradation location estimation server S2.
- the partial network ⁇ 3 has a router (or switch) R3-1 connected to the router (or switch) R3-2, R3-3, and the router (or switch) R3-2 power router (a R3—4, R3—5 connected to router (or switch) R3—3 power router (or switch) R3—6, R3—7 connected to router (or switch) R3—4 Terminals ⁇ 3—1, ⁇ 3—2 are provided below, routers (or switches) R3—5 are equipped with terminals ⁇ 3—3, ⁇ 3—4, and terminals (or switches) R36 are connected to terminals ⁇ 3—5, ⁇ 3—6 And a terminal ( ⁇ 3-7, 73-8) under the router (or switch) R3-7.
- the router (or switch) R3-1 is connected to the partial network quality degradation location estimation server S3.
- Quality information has a function of notifying partial network quality degradation location estimation servers S1 to S3 of flow quality information to the partial network quality degradation server responsible for the processing of the partial network to which the terminal belongs.
- Terminals 1 1 to 1 8, ⁇ 2-1 to ⁇ 2—7, ⁇ 3—1 to 83-8 are partial network quality degradation location estimation servers S1 that are responsible for the processing of the partial network to which the terminal belongs.
- the flow quality information is information relating to communication quality such as packet loss rate, packet loss burstiness, reception rate, delay, delay jitter, and the like.
- the partial network quality degradation location estimation servers S1 to S3 are responsible for the processing of the corresponding partial networks N1 to N3, respectively. (Partial network that also includes power) It knows the IP address of the router and the routers at both ends, and the IP address of the terminal connected to it, and receives the terminal power flow quality information.
- the partial network quality degradation location estimation servers S1 to S3 respectively perform partial network quality degradation location estimation servers S1 to S3 that are responsible for processing of the adjacent partial networks N1 to N3, and the overall network quality degradation location estimation. Knows the address of server SA1 and can communicate with them.
- FIG. 2 shows an internal configuration diagram of partial network quality degradation location estimation servers S1 to S3 in the present embodiment.
- partial network quality degradation location estimation server S1 will be described, but the same applies to the partial network quality degradation location estimation servers S2, S3.
- the partial network quality degradation location estimation server S1 includes a communication characteristic information collection unit S11, a route information collection unit S12, a flow quality / routed link table management unit S13, a table storage unit S14, and a non-degraded link. It comprises a removal processing unit S15 and a server cooperation unit S16.
- the communication characteristic information collection unit S11 has a function of receiving communication characteristic information indicating characteristics of current communication from a terminal or a partial network quality degradation location estimation server of an adjacent network.
- the communication characteristic information includes a flow identifier and the flow quality information.
- the flow identifier is information that can identify a flow, which includes the address of the sending terminal of the flow and the address of the receiving terminal, a TCP or UDP port number, a protocol identifier, and the like.
- the communication characteristic information collecting unit S11 receives a communication end notification from the terminal.
- the route information collection unit S12 has a function of collecting routing information (routed link information) from the router (or switch) belonging to the partial network N1 that is processed by the partial network quality degradation location estimation server S1.
- Information on routing is collected using, for example, SMTP (Simple Network Management Protocol). [0046] If there is information related to routing, it is possible to determine on which route communication between terminals is performed from the address information of the terminals.
- SMTP Simple Network Management Protocol
- the routing information is information that also extracts the routing table and ARP table power when the router power is also collected, and the information that is extracted from the forwarding database power when the switch power is also collected. This is the configuration information of the Spayung tree.
- this routing information may not be collected from the router (or switch) by the route information collection unit S12, but may be given to the route information collection unit S12 by the network administrator.
- the flow quality / routed link table management unit S13 is described later on the basis of the communication characteristic information obtained from the communication property information collecting unit S11 and the information (routed link information) related to routing from the route information collecting unit S12. It has a function to create and manage the flow quality / via link table S131.
- the flow quality / routed link table management unit S13 uses a flow identifier for a flow that is currently being communicated based on the communication characteristic information and routing information (routed link information). And the set of links through which they are currently passing, the partial network through which the flow passes (PrevNet), the partial network through which the flow passes next (NextNet), and the current communication quality of the flow. Quality flag and force A function to create and manage the configured flow quality / via link table S131.
- the partial network quality degradation location estimation server S1 is the partial network N1 that is responsible for processing.
- the communication characteristics information of the corresponding flow is notified to the partial network quality degradation location estimation servers S2 and S3 of the adjacent partial networks N2 and N3 through which the corresponding flow comes out next.
- the link is a directed link between routers (or switches) or between a router (or switch) and a terminal.
- the directed link is between the same routers (or switches) or the same router.
- FIG. 3 shows the directed link names of the network configuration diagram shown in FIG. 1
- FIG. 4 is a diagram showing an example of the network configuration flow shown in FIG.
- Information included in the flow quality information constituting the communication characteristic information (packet loss rate, packet loss burstiness, reception rate, delay, delay jitter, etc.) A judgment is made as to whether or not the obtained flow quality index exceeds a given degradation threshold value that indicates whether or not the quality is deteriorating. If it is above, the quality of the flow is degraded and the value of the quality flag is 1.
- the quality flag value is set to 0, assuming that the flow quality is likely to deteriorate.
- the quality flag is undefined (hereinafter referred to as "NZA").
- one of the flow quality information may be simply used.
- packet loss rate For a VoIP flow, packet loss rate, delay jitter, etc.
- the R-value may be obtained from the ITU-T recommendation G. 107 E-Model and used as an indicator of flow quality.
- the table storage unit S14 stores a flow quality / routed link table S131.
- the non-degraded link removal processing unit S15 has a flow quality / process stored in the table storage unit S14. From the link table S131, flow quality information, via link information, etc. are read, and if there is a flow with a quality flag value of 1, a value of 1 will be set in the via link column of the flow line with a quality flag of 0 value.
- a function that removes the corresponding link row and the corresponding flow row whose quality flag has a value of 0, and after the removal of the link column, which via link has a value of 1 in the quality flag row The column has a value of 1 and has a function of removing a line.
- non-degraded link removal processing for removing a link is performed on the flow quality / routed link table S131 shown in FIG. 5 by the non-degraded link removal processing unit S15, it is shown in FIG.
- the flow quality / routed link table S151 is created, and the flow quality information and routed link information extracted from the flow quality / routed link table S151 as shown in FIG. 8 are output to the server linkage unit S16 as a result.
- the non-degraded link removal processing for the flow quality / routed link table S 131 shown in FIG. 5 is performed first for the flows Fl, F3, and F4 having a quality flag of 0. At least one place in the row has a value of 1 1— 1, 1 -4, 1-28, 1-10, 18, 1—6 via link column and quality flag force O value flow Fl, The rows F3 and F4 are removed from the flow quality / routed link table S131 shown in FIG.
- the non-degraded link removal processing is performed, and the flow quality / routed link table S151 shown in FIG. 8 is created from the flow quality / routed link table S131 shown in FIG.
- the flow quality information and the via link information extracted from the flow quality / via link table S151 as shown are output to the server cooperation unit S16 as a result.
- the non-degradation link removal processing unit S15 performs the above-described non-degradation on the flow quality / routed link table S 131 shown in Figs.
- link removal processing is performed, a flow quality / routed link table S151 as shown in FIGS. 9 and 10 is created and extracted from the flow quality / routed link table S151 as shown in FIGS. Flow quality information and via link information Etc. are output as a result.
- the server cooperation unit S16 has a function of performing communication between the partial network quality degradation location estimation server S1 and the entire network quality degradation processing server SA1, and the flow quality information output by the non-degradation link removal processing unit S15. And the via link information is received, and the received flow quality information and via link information are sent to the all network quality degradation processing server SA1.
- FIG. 11 is a block diagram showing a hardware configuration of partial network quality degradation location estimation server S 1 according to the present embodiment.
- partial network quality degradation location estimation servo S 1 can be realized by a hardware configuration similar to that of a general computer device, and a CPU (Central Processing Unit) 1001, main memory such as RAM (Random Access Memory), main memory 1002 used for data work area and temporary data save area, communication control part 1003 for sending and receiving data via Internet 2000, liquid crystal Presentation unit 1004 for displays, printers, speakers, etc., input unit 1005 for keyboards and mice, etc., interface unit 1006 for sending and receiving data by connecting to peripheral devices, non-volatile devices such as ROM (Read Only Memory), magnetic disk, semiconductor memory, etc.
- ROM Read Only Memory
- the partial network quality degradation location estimation server S1 operates as an LSI (Large Scale Integrated) that incorporates a program that realizes such a function in the partial network quality degradation location estimation server S1.
- LSI Large Scale Integrated
- a hardware component such as a circuit is mounted and realized as a hardware component, and a program that provides each function of each component described above is executed by the CPU 1001 on the computer processing device. Therefore, it can be realized by software. That is, the CPUIOOI loads the program stored in the auxiliary storage unit 1007 to the main storage unit 1002 and executes it, and controls the operation of the partial network quality degradation point estimation server S1 as described above.
- Each function is implemented in software.
- FIG. 12 shows an internal configuration diagram of all network quality degradation point estimation Sano SA1 in the first embodiment of the present invention.
- the total network quality degradation location estimation sano SA1 includes a server cooperation unit SA11, a table processing unit SA12, a table storage unit SA13, a quality degradation location estimation unit SA14, and a display unit SA15.
- the server cooperation unit SA11 receives the information extracted from the non-degraded link removal processing flow quality / routed link table S151 sent from each partial network quality degradation location estimation server S1 to S3, and performs table processing.
- Part SA12 has a function to pass.
- the table processing unit SA12 performs a merge process on the flow quality / routed link table S151 of the partial networks N1 to N3 based on the information received from the server cooperation unit SA11, and further creates a free table.
- the table has a function of writing a table created by filling the entry with a value of 0 to the table storage unit SA13.
- FIG. 13 shows the flow quality / routed link table SA121 created by the table processing unit SA12 based on the flow quality / routed link table S151 shown in FIGS.
- the table processing unit SA12 receives the information extracted from the flow quality / routed link table S151 shown in FIGS. 8 to 10 from the server cooperation unit S16 of the partial networks N1 to N3.
- the flow quality / routed link table SA121 can be created by merging them and filling the empty table entries with 0 values.
- the table processing unit SA12 based on the values in the PrevNet and NextNet fields in the flow quality / route link tables S151 of the partial networks N1 to N3,
- the same flow in each flow quality / route link table S151 of the queues N1 to N3 can be combined into one line, and one table can be created from each flow quality / route link table S151. This is a merge process.
- the table storage unit SA13 stores the flow quality / routed link table SA121 created by the table processing unit SA12.
- the quality degradation point estimation unit SA14 periodically reads the flow quality / routed link table SA121 from the table storage unit SA13, estimates the quality degradation point, and outputs the estimated quality degradation point to the display unit SA15. It has the function to do.
- the display unit SA15 is, for example, a liquid crystal display or the like, and has a function of displaying the quality deterioration point passed from the quality deterioration point estimation unit SA14.
- the hardware configuration of all network quality degradation location estimation server SA1 according to the present embodiment is the same as that of a general computer device, similar to the hardware configuration of partial network quality degradation location estimation server S1 shown in FIG. Since it can be realized by a hardware configuration, the description is omitted.
- All network quality degradation location estimation server SA1 is implemented by mounting a circuit component incorporating a program that realizes such a function inside all network quality degradation location estimation server SA1.
- a circuit component incorporating a program that realizes such a function inside all network quality degradation location estimation server SA1.
- it can be realized in hardware by executing a program that provides each function of each component described above on a CPU.
- the CPU loads the program stored in the auxiliary storage unit to the main storage unit and executes it, and controls the operation of the entire network quality degradation point estimation server SA1 to thereby execute each of the above-described items.
- Implement functions in software
- FIG. 14 is a flowchart showing the operation of the partial network quality degradation location estimation server S1.
- the route information collection unit S12 performs processing by the partial network quality degradation location estimation server S1.
- the router (or switch) located in the partial network Nl that manages the logic Rl — Obtains route information of the predetermined flow from R1 to R15, and the communication characteristic information collection unit S11 includes the router (yes or no switch). ) Communication characteristics information for a given flow from terminals T1 1 to T1 8 located in R1—1 to R1—5 and the partial network quality degradation location estimation servers S2, S3 of adjacent partial networks ⁇ 2, ⁇ 3 Is acquired (step S131).
- the flow quality / routed link table management unit S13 creates the flow quality / routed link table SA121 based on the route information and communication characteristic information acquired in step S1 (step S132). .
- the flow quality / routed link table management unit S13 uses the information of the flow quality / routed link table SA121 created in step S2, and the partial network quality degradation point estimation servers S2, S3 of the adjacent partial networks ⁇ 2, ⁇ 3.
- the non-degraded link removal processing unit S15 performs non-degraded link removal processing on the flow quality / routed link table SA121 created in step S2, and the flow quality / routed link from the flow quality / routed link table SA121.
- a table SA151 is created (step S133).
- the server cooperation unit S16 transmits the information of the flow quality / routed link table SA151 created in step S3 to the all network quality degradation point estimation server SA1 (step S134).
- the non-degraded link removal processing unit S15 reads the flow quality information and the via link information from the flow quality / route link table S131 stored in the table storage unit S14 (step S1331), and the quality flag is 1. If there is a value flow, remove the column of the via link that has a value of 1 in the via link column of the flow column with a quality flag of 0 and the corresponding flow row with a value of 0 in the quality flag ( Step S 1332).
- the non-degraded link removal processing unit S15 is a row in which the quality flag has a value of 1 and none of the via link columns has a value of 1. Is also removed from the flow quality / route link table S131 to create a flow quality / route link table SA151 (step S1333).
- Fig. 16 is a flowchart showing the operation of the entire network quality degradation point estimation SANO SA1.
- the server cooperation unit SA11 performs each partial network quality degradation point estimation server Sl ⁇
- the table processing unit SA12 merges the flow quality / routed link table S151 of the partial networks N1 to N3 based on the information received from the server cooperation unit SA11. Flow quality by filling entries with a value of 0
- step S152 / Via link table S A121 is created.
- the flow quality / routed link table SA121 is periodically read from the quality degradation location estimation unit SA14 force table storage unit SA13 to estimate the quality degradation location (step S153).
- the display unit SA15 displays the quality degradation portion estimated in step S13 (step S154).
- step S152 the processing of the table processing unit SA12 in step S152 will be described in more detail with reference to the flowchart shown in FIG.
- step S1 521 When the table processing unit SA12 receives the information from the server cooperation unit SA11 (step S1 521), among the information received in step S121, in the flow quality / routed link table S151 of the information partial networks N1 to N3 Based on the values in the PrevNet and NextNet columns, a table in which the same flows in each flow quality / routed link table S151 of the partial networks N1 to N3 are merged into one line is created as a merge process (step S1522).
- the table processing unit SA12 creates the flow quality / routed link table SA121 by filling empty entries in the table created by the merge process in step S122 with a value of 0 (step S1523). ).
- the processing of the quality degradation point estimation unit SA14 in step S153 includes the Electronic Information Communication Society Technical Report TM-2004-107 “Network Quality Degradation from Flow Quality Information”.
- the minimum link number estimation method described in “Location estimation method” and the method described in Japanese Patent Application Laid-Open No. 2002-271932 “Voice quality management method for each call in IP network” can be used.
- the three links ⁇ Ll-17, L2-24, L3-7 ⁇ are estimated as the degradation points in the network 100.
- the entire network 100 is divided into partial networks N1 to N3.
- Each partial network N1 to N3 collects communication characteristic information and route information only for the flows that pass through the respective partial networks N1 to N3, thereby distributing and parallel processing the collection load on the network information. Processing time related to processing can be reduced.
- the non-degraded link removal processing is performed such that the non-degraded link removal processing unit S15 in each of the partial networks N1 to N3 performs distributed and parallel processing in each partial network. Thus, it is possible to reduce the processing time required for the estimation process of the quality degradation point. [0118] (Second Embodiment)
- the partial network quality degradation location estimation server S1 performs non-degraded link removal processing on the partial network responsible for processing, and is possible based on partial information! As long as the quality degradation point estimation process is performed, the partial network quality degradation point estimation server S1 performs the estimation process of the quality degradation point for the part where the partial network quality degradation point estimation server S1 cannot perform the estimation process. This is different from the first embodiment.
- the flow passes through only the partial networks N1 to N3 that the partial network quality degradation location estimation servers S1 to S3 are responsible for (each other network;;) Otherwise, the flow is called an external flow.
- Figure 18 shows the internal configuration of the partial network quality degradation location estimation server in this embodiment.
- the partial network quality degradation location estimation servers S1 to S3 in this embodiment include a partial quality degradation location estimation section S17 inside the partial network quality degradation location estimation servers S1 to S3 in the first embodiment. Since only the points are different, the explanation will be given mainly focusing on the different points.
- the partial quality degradation point estimation unit S17 in the present embodiment is the flow quality information and via link of the flow quality / routed link table S1 51 created by the non-degraded link removal processing unit S15 performing the non-degraded link removal processing. It has a function of receiving information and the like from the non-degraded link removal processing unit S15, estimating a link degradation point based on the received information, and passing information about the estimated degradation point to the server cooperation unit 16.
- the server cooperation unit S16 in the present embodiment has a function of performing communication between the partial network quality degradation location estimation server S1 and the entire network quality degradation processing server SA1, and the partial quality degradation location estimation unit S17 outputs The received flow quality information, routed link information, external block (described later) and information on the estimated degradation location are received, and the received information is transmitted to the entire network quality degradation processing server SA1.
- FIG. 19 shows the overall network quality degradation location estimation server SA1 in the present embodiment. An internal block diagram is shown.
- the overall network quality degradation location estimation server SA1 in the present embodiment periodically reads the flow quality / routed link table from the quality degradation location estimation unit SA14 force table storage unit SA13, and also performs partial processing from the server cooperation unit SA11. It differs from the overall network quality degradation location estimation server SA1 in the first embodiment in that it receives quality degradation location information in the networks N1 to N3.
- the server cooperation unit SA11 in the present embodiment receives information indicating external blocks and quality deterioration points sent from the respective partial network quality deterioration point estimation servers S1 to S3, and performs table processing on the information indicating the external blocks. It has a function to pass to the part SA12 and to pass information indicating the quality deterioration part to the quality deterioration part estimation part SA14.
- the table processing unit SA12 in the present embodiment has a function of, for example, merging the external blocks in the flow quality / routed link table S151 of the partial networks N1 to N2 received from the server cooperation unit SA11.
- the quality degradation location estimation unit SA14 in the present embodiment estimates the quality degradation location according to the operation of the quality degradation location estimation unit SA14 in the first embodiment, and receives the estimation result and the server linkage unit SA11. It has the function of passing the union of quality degradation points to the display unit SA15.
- FIG. 20 is a flowchart showing the operation of the partial network quality degradation location estimation server S1 in the second embodiment.
- steps S191 to S193 shown in FIG. 20 are the same as steps S131 to S133 shown in FIG.
- step S194 the partial quality degradation location estimation unit S17 performs local block extraction processing (described later) based on the flow quality / routed link table SA151 after non-degradation link removal processing, thereby obtaining a quality degradation location. Is estimated.
- step S195 the server cooperation unit S16 transmits the information indicating the external block and the information on the quality degradation portion estimated in step S24 to the entire network quality degradation location estimation server SA1.
- the process (local block extraction process) of the partial quality degradation point estimation unit S17 in step S194 will be described in more detail.
- step S15 when the partial quality degradation point estimation unit S17 receives from the non-degraded link removal processing unit S15 the flow quality information / routed link information of the flow quality / routed link table created by the non-degraded link processing (step S15). S1941), replacing the row and column of the flow quality / routed link table, and as shown in FIG. 28 and FIG. ) And a flow quality / routed link table with external blocks (step S 1942) to estimate a partial quality degradation location (step S 1943) and link information about the estimated quality degradation location to the server Passed to part S 16 (step S 1944).
- a local block means that when two flows pass through the same link (path), the two flows are said to have a shared link with each other.
- the external block refers to an internal flow that is not a pure internal flow or a part related to an external flow and is not a pure internal flow in the partial network flow quality / routed link table. Or a row of external flows and a column of links through which one of those flows passes.
- step S1942 will be described with reference to the flowchart shown in FIG.
- This specific processing procedure is such that the partial quality degradation point estimation unit S17 first causes the internal flow to come to the upper row with respect to the row of the flow quality / routed link table (the external flow comes to the lower row). And the rearrangement is performed so that the number of rows of the block whose upper right component value is 0 (referred to as the upper right zero block) is maximized (step S19421).
- step S19422 the partial quality degradation point estimation unit S17, with respect to the column of the flow quality / routed link table, the block whose lower left component is 0 for the column not related to the upper right zero block (lower left) A process of replacing columns so that the number of columns of (zero block) is maximized is performed (step S19422).
- step S19421 to S19422 is repeated until both the number of rows in the upper right zero block and the number of columns in the lower left zero block no longer increase, and local blocks and outer blocks are obtained (step S 19423). .
- the partial quality degradation point estimation unit S17 performs the minimum link number estimation process on the local block as described above, and obtains a set of links whose quality is degraded (quality degradation link set). A partial quality degradation point is estimated, and the estimation result based on the outer block and the quality degradation link set is notified to the server cooperation unit S16.
- step S25 the server cooperation unit S16 receives the information indicating the external block received from the partial quality degradation location estimation unit S17 and the quality degradation location as a result of the estimation in the entire network quality degradation processing. Send to server SA1.
- FIG. 23 is a flowchart showing the operation of the entire network quality degradation point estimation server SA1 in the present embodiment.
- the server cooperation unit SA11 receives information indicating each external block and each quality degradation location sent from each partial network quality degradation location estimation server Sl to S3 (step S221), Information indicating the quality degradation location is passed to the table processing unit SA12, and information indicating each quality degradation location is passed to the quality degradation location estimation unit SA14 (step S222).
- the table processing unit SA12 merges each external block in the flow quality / routed link table S151 of each of the partial networks N1 to N3 based on the information received from the server cooperation unit SA11. Then, the flow quality / routed link table SA121 is created by filling the empty table entry with a value of 0 (step S223).
- merge process is the same as the merge process in the first embodiment, and a description thereof will be omitted.
- the quality degradation location estimation unit SA14 performs the quality degradation location estimation process in the same manner as the quality degradation location estimation unit SA14 in the first embodiment (step S224).
- the display unit SA15 displays the result of the estimation process and the union of the quality degradation points that also received the quality degradation point estimation unit SA14 force in step S45 (step S226).
- the flow quality / routed link table in Figure 4 is as shown in the tables in Figs.
- FIG. 25 to FIG. 27 are diagrams showing the flow quality / routed link table of the partial networks N1 to N3.
- Partial quality degradation point estimation unit S1 in which the table remains unchanged after the non-degraded link removal processing of 5
- FIG. 28 to FIG. 30 are diagrams showing the flow quality / routed link tables of the partial networks N1 to N3 after the local block extraction processing.
- step S194 the minimum number of links is estimated, and ⁇ L1-17 ⁇ is estimated as a degraded location in the partial quality degradation location estimation unit S17 of the partial network estimation server S1.
- the partial quality degradation point estimation unit S17 of the partial network estimation server S3 estimates ⁇ L3-17 ⁇ and ⁇ L3-15 ⁇ as degradation points.
- step S195 these estimation results and the external blocking force server cooperation unit S16 are notified.
- the server linkage unit SA11 of the overall network quality degradation location estimation server receives a list of quality degradation locations from the server linkage unit S16 of the partial network quality degradation location estimation servers S1 to S3 as ⁇ Ll-17, L3- 17, L3-15 ⁇ is received and passed to the quality degradation point estimation unit SA14, and information indicated by the external block of the table shown in FIGS. 28 to 30 is received and passed to the table processing unit SA12.
- the table processing unit SA12 merges the external blocks based on the information received from the server cooperation unit SA11, and creates and creates a table related to the merged external block as shown in FIG. A table relating to the merged external block is stored in the table storage unit SA13.
- the quality degradation point estimation unit SA14 performs the minimum link number estimation process on the table related to the merged external block stored in the table storage unit SA13.
- the quality degradation location estimation unit SA14 obtains the estimation result obtained by performing the minimum link number estimation process and the quality degradation location notified from the server communication unit SA11 ⁇ L1 17, L3 17, L
- Figure 32 shows the link table for the flow quality after collecting the flow information of all networks and performing the non-degraded link removal processing by the conventional method.
- the result of the minimum link number estimation process is (L1—17, L2-24, L3—10, L3— 1
- the quality degradation location estimation unit S17 of each of the partial networks N1 to ⁇ 3 performs a part of the quality degradation location estimation processing in parallel. In addition, it is possible to reduce the processing time required for the estimation process of the quality degradation portion.
- the third embodiment of the present invention has the same configuration and function as the partial network quality degradation location estimation servers S1 to S3 in the second embodiment, but in operation, the partial quality degradation location estimation unit S17 and Server linkage part S16 has different points, and the server linkage of the overall network quality degradation point estimation server SA1 in the second embodiment Since the part SA11 and the table processing part SA12 have different points, different points are mainly described as appropriate.
- the partial network quality degradation location estimation servers S1 to S3 pass only through the partial networks N1 to N3 that are in charge of processing (does not pass through other networks). ! /,;) Flow is called internal flow, otherwise! /, Flow (flow through multiple partial networks) is called external flow.
- the partial quality degradation location estimation unit S17 in the present embodiment has the same configuration and function as the partial quality degradation location estimation unit S17 in the second embodiment, but in particular, the quality degraded link set and the solved It has a function to notify the server linkage unit S16 of the flow identifier of the external flow and the line information (flow identifier, via link, PrevNet, NextNet, quality flag information) of the unresolved external flow (not shown).
- the internal flow limited estimation part is the estimation result of estimating the quality degradation link set by performing the minimum link number estimation process for the set of rows with only internal flow in the flow quality / routed link table.
- the server linkage unit S16 in the present embodiment has the same configuration and function as the server linkage unit S16 in the second embodiment, but in particular, the partial quality degradation point estimation unit S17 has been received. It has a function of transmitting the quality degradation link set, the flow identifier of the resolved external flow, and the line information of the unresolved external flow to the entire network quality degradation processing server SA1 (not shown).
- the server cooperation unit SA11 in the present embodiment has the same configuration and function as the server cooperation unit SA11 in the second embodiment, but in particular, it is transmitted from each partial network quality degradation point estimation server S1 to S3.
- the table processing unit SA12 receives the flow identifier of the resolved external flow, the flow identifier of the resolved external flow, and the line information of the unresolved external flow, and the flow identifier of the resolved external flow and the line information of the unresolved external flow.
- the table processing unit SA12 in the present embodiment has the same configuration and function as the table processing unit SA12 in the second embodiment.
- each of the partial networks N1 to N1 received from the server cooperation unit SA11 Based on N3's resolved external flow identifier and unresolved external flow line information, all partial networks N1 to N3 have a function of determining a flow identifier that becomes an unresolved external flow (not shown).
- the table processing unit SA12 in the present embodiment performs the second embodiment based on the determined flow identifier of the unresolved external flow and information notified from each of the partial networks N1 to N3. Perform merge processing in the same manner as above, and fill the empty table entries with 0 values.
- the partial networks N1 to N3 in the present embodiment have the same link numbers because the directed links are set uniquely, as in the partial networks N1 to N3 in the second embodiment. Can only appear in a single partial network table because they are not duplicated. The same flow has the same quality flag.
- the table processing unit SA12 in the present embodiment performs the flow identifiers of the PrevNet and NextNet in the flow quality / routed link table S151 of the partial networks Nl to N3 and the flow identifiers of the determined unresolved external flows.
- the same flow in each flow quality / routed link table S151 of the partial networks N1 to N3 can be combined into one line, and one table can be created from each flow quality / routed link table S151. Can do. This is the merge process in this embodiment.
- the operations of the partial network quality degradation location estimation servers S1 to S3 in the present embodiment are the same as the operations of the partial network quality degradation location estimation servers S1 to S3 in the second embodiment.
- the quality degradation point estimation unit S17 differs from the operation of the partial network quality degradation point estimation servers S1 to S3 in the second embodiment in that the internal flow limited estimation point, the resolved external flow, and the unresolved external flow are obtained.
- FIG. 33 is a flowchart showing the operation of the partial network quality degradation location estimation server SI in the third embodiment.
- steps S321 to S323 shown in FIG. 33 are the same as steps S131 to S133 shown in FIG.
- step S324 the partial quality degradation location estimation unit S17 estimates the quality degradation location based on the flow quality / routed link table SA151 after the non-degradation link removal processing, and obtains the internal flow limited estimation location. (Internal flow limited estimation process) notifies the server linkage unit S16 of the quality degradation link set, the flow identifier of the resolved external flow, and the line information of the unresolved external flow.
- step S325 the server cooperation unit S16 transmits the quality degradation link set, the flow identifier of the resolved external flow, and the line information of the unresolved external flow to the all network quality degradation location estimation server SA1. .
- the partial quality degradation point estimation unit S17 performs the minimum link number estimation process on the line with only the internal flow in the flow quality / routed link table S151 to estimate the quality degradation link aggregate. Thus, an internal flow limited estimated location is obtained (step S3341).
- the partial quality degradation location estimation unit S17 determines, for each external flow, whether or not any internal flow limited estimation location obtained in step S541 passes through.
- the solved external flow or the unresolved external flow is obtained (step S3342).
- the partial quality degradation location estimation unit S17 performs the quality degradation link set estimated in step S3341, the flow identifier for the resolved external flow obtained in step S3342, and the row information about the unresolved external flow. Is notified to the server linkage unit S16 (step S3343).
- FIG. 35 is a flowchart showing the operation of the entire network quality degradation location estimation server SA1 in the present embodiment.
- the server cooperation unit SA11 performs each partial network quality degradation point estimation server Sl ⁇
- the degraded link set sent by S3, the flow identifier of the resolved external flow, and The line information of the unresolved external flow is received (step S341), the flow identifier of the resolved external flow and the line information of the unresolved external flow are passed to the table processing unit SA12, and the quality degradation link set is also received. Is passed to the quality degradation point estimation unit SA14 (step S342).
- the table processing unit SA12 determines a flow identifier to be an unresolved external flow in all of the partial networks N1 to N3, and the determined unresolved external flow On the basis of the flow identifier and the information notified from each of the partial networks N1 to N3, the merge processing according to the present embodiment is performed, and the empty table entries are filled with 0 values.
- a flow quality / via link table SA121 is created at step S343.
- Steps S344 to S346 are the same as steps S224 to S226 in the second embodiment, and a description thereof will be omitted.
- the flow quality / via link table S131 in Fig. 4 looks like the table shown in Figs.
- flows Fl and F2 are external flows and flows F3, F4, F5, and F6 are internal flows.
- flow F2 is an external flow and flows F7, F8, and F9 are In the partial network N3, flows Fl and F2 are external flows, and flows FIO and F11 are internal flows.
- step S541 a minimum link number estimation process is performed.
- L2- 12, L2- 10 ⁇ , ⁇ L2- 24, L2— 10 ⁇ , ⁇ L 2-19, L2— 10 ⁇ are estimated, and ⁇ L3— 10 ⁇ , ⁇ L3— 7 ⁇ are estimated in the partial network N3 Is done.
- ⁇ L1—6, L1—17 ⁇ is output in the partial network N1, and is stored in the partial network N2.
- step S542 resolved external flows and unresolved external flows are determined.
- the external flow F2 has the quality degradation link set ⁇ L2—
- the external flow F1 has the quality degradation link set ⁇ L3—
- L3—7 ⁇ is a resolved external flow because it passes through link L3—10, and external flow F2 does not pass through the link included in the degraded quality link set ⁇ L3—10, L3—7 ⁇ Therefore, it is an unresolved external flow.
- step S543 the server linkage unit S16 is notified of the quality degradation link set obtained in step S541, the flow identifier of the resolved external flow obtained in step S542, and the line information of the unresolved external flow. .
- the server cooperation unit S16 notifies this information to the entire network estimation Sano SA1.
- the server linkage unit SA11 of the overall network estimation server SA1 receives the quality degradation notified from the partial network quality degradation location estimation servers S1 to S3 of the partial networks N1 to ⁇ 3.
- ⁇ ⁇ link set ⁇ LI— 6 : LI— 17 ⁇ , ⁇ L2-2, L2-4, L2-7, L2-12, L2-24, L2
- the server cooperation unit SA11 passes the identifier of the resolved external flow and the line information of the unresolved external flow notified to the partial network quality degradation location estimation servers S1 to S3 to the table processing unit SA12.
- the table processing unit SA12 performs the following processing.
- the external flows notified from each of the partial networks N1 to N3 are flows Fl and F2.
- the flow F1 is a resolved flow in the partial network N3, and the flow F2 is a partial flow. Resolved flow on network N2.
- the quality degradation point estimation unit SA14 since the quality degradation point estimation unit SA14 does not perform the minimum link number estimation process, there is no quality degradation point estimated according to the operation of the quality degradation point estimation unit SA14 in the first embodiment. Therefore, the quality degradation link set notified from the server cooperation unit SA11 is the final result as it is (L1-6, Ll-17, L2-2, L2-4, L2-7, L2-12, L2-24, L2 -19, L2-10, L3-10: L3-7 ⁇ Force display unit S15 is passed.
- Fig. 39 shows a flow quality 'via link table created by performing the non-degraded link removal processing by the conventional method for the flow information collected for all network capabilities in this specific example.
- the result of the minimum link number estimation process is ⁇ Ll-6, Ll-17, L2-10, L2-24, L3-10 ⁇ .
- the estimation accuracy of the quality degradation location Is slightly worse, but it may be possible to reduce the processing time required to estimate the quality degradation point.
- a re-estimation unit S18 that performs re-estimation processing in response to an instruction from the table processing unit SA12 of the overall network quality degradation location estimation server SA1 is added to the partial network quality degradation location estimation servers S1 to S3. This is different from the third embodiment, so the explanation will be given mainly focusing on the different points.
- FIG. 40 shows an internal configuration diagram of partial network quality degradation location estimation servers S1 to S3 in the fourth embodiment.
- Partial network quality degradation location estimation servers S1 to S3 in the present embodiment are additionally provided with a re-estimation unit S18 having a function of exchanging information with the non-degraded link removal processing unit S15 and the server cooperation unit S16. This is different from the partial network quality degradation point estimation servers S1 to S3 in the third embodiment.
- the non-degrading link removal processing unit S15 of the fourth embodiment has the functions of the non-degrading link removal processing unit S15 of the partial network quality degradation point estimation servers S1 to S3 of the third embodiment.
- the reestimation unit S18 When the reestimation unit S18 receives an instruction for reestimation processing (described later) from the table processing unit SA12 of the overall network quality degradation point estimation Sano SA1 via the server linkage unit S16, the reestimation unit S18 performs reestimation processing. It has the function of receiving the flow identifier of the external flow from the server linkage unit S16 and performing estimation processing.
- the server cooperation unit S16 of the fourth embodiment has the same configuration and functions as the server cooperation unit S16 of the third embodiment, but the server cooperation unit S16 of the third embodiment.
- the quality degradation link set and the resolved external When the raw flow identifier and the line information (flow identifier, via link, PrevNet, NextNet, quality flag information) of the unresolved external flow are notified, the above information indicating that the re-estimation processing has been performed is notified And has a function of notifying all the network quality degradation location estimation server SA1.
- the server cooperation unit S16 of the fourth embodiment has a function of receiving a flow identifier of a predetermined flow from the server cooperation unit SA11 and passing the notified flow identifier to the re-estimation unit S18.
- FIG. 41 shows an internal configuration diagram of the entire network quality degradation location estimation server SA 1 in the fourth embodiment.
- the overall network quality degradation location estimation server SA1 in the present embodiment is the first in that the table processing unit SA13 has a function of instructing the partial network quality degradation location estimation servers S1 to S3 to perform re-estimation processing. This is different from the overall network quality degradation location estimation server SA1 in the third embodiment.
- the server cooperation unit SA11 in the present embodiment is similar to the server cooperation unit SA11 in the third embodiment, and information on quality degradation link sets sent from the respective partial network quality degradation point estimation servers S1 to S3,
- the flow identifier of the resolved external flow and the line information of the unresolved external flow are received, the flow identifier of the resolved external flow and the line information of the unresolved external flow are passed to the table processing unit SA12, and the quality degradation link set information Is provided to the quality degradation point estimation unit SA14.
- the server cooperation unit SA11 in the present embodiment performs re-estimation processing when the information transmitted from each of the partial network quality degradation location estimation servers S1 to S3 has information based on the re-estimation processing.
- the information that it is based on this also has a function of passing to the table processing unit SA12 and the quality degradation point estimation unit SA14.
- the table processing unit SA12 in the present embodiment has a function of performing a predetermined process based on whether or not the information passed from the server cooperation unit SA11 has information indicating that it is a re-estimation process. For example, the table processing unit SA12 sends a reestimation processing instruction to the reestimation unit S18 of the partial network quality degradation location estimation servers S1 to S3 in a predetermined case, with the server cooperation unit SA11 and the server cooperation unit S16. Do through.
- the quality degradation location estimation unit SA14 in the present embodiment has the same configuration and function as the quality degradation location estimation unit SA14 in the third embodiment, and therefore, a force that omits detailed description. Server cooperation unit
- the quality-degraded link set of each partial network N1 to N3 received from SA11 can be both with and without information indicating that it is due to re-estimation processing. The information (information received later) is used for processing.
- the non-degraded link removal processing unit S15, the re-estimating unit S18, and the server cooperation unit S16 of the partial network quality degradation location estimation servers S1 to S3 in the present embodiment which are different in operation from the third embodiment.
- the operation and the operations of the server cooperation unit SA11, the table processing unit SA12, and the quality degradation processing estimation unit SA14 of the overall network estimation Sano SA1 will be mainly described.
- the operation of the partial network quality degradation location estimation servers S1 to S3 in the fourth embodiment is the same as that in the third embodiment if the re-estimation processing request is not made from the entire network estimation Sano SA1. Since the operation is the same as that of the network quality degradation location estimation servers S1 to S3, the description is omitted.
- FIG. 42 is a flowchart showing an example of the operation of the partial network quality deterioration location estimation server S1 in the present embodiment.
- the re-estimation unit S18 receives the request for re-estimation processing transmitted from the entire network estimation Sano SA1 (step S411).
- the non-degraded link removal processing unit S15 receives the flow quality / routed link table S151 after the non-degraded link removal processing and the internal flow. Information is requested and the flow identifier of the external flow is requested to the server linkage unit S16 (step S412).
- the re-estimation unit S18 receives the flow quality / routed information notified from the non-degraded link removal processing unit S15.
- the internal flow lines in the link table S151 and the external flow lines identified by the flow identifier notified from the server linkage unit S16 are extracted, and the minimum link number estimation process is performed for those flows. ⁇ Estimate the quality degradation link set such as the internal flow limited estimation part (step S413).
- the re-estimation unit S18 determines a resolved external flow or an unresolved external flow based on whether or not it has the ability to pass through at least one path indicated by the internal flow limited estimation location (step S414).
- the server degradation unit S16 is notified of the quality degradation link set, the flow identifier of the resolved external flow, and the line information of the unresolved external flow (step S415).
- the server cooperation unit S16 uses the information indicating that the quality degradation link set, the flow identifier of the resolved external flow, and the row information of the unresolved external flow are re-estimation processing, together with the information indicating that the entire network quality degradation location Transmit to the estimation server SA1 (step S416).
- step S412 the internal flow and the flow identifier received from the server cooperation unit S16 are used.
- the non-degraded link removal processing unit S15 is requested for the information of the resolved external flow identified, and in step S413, the minimum number of links is determined based on the information of the internal flow and the resolved external flow identified by the flow identifier.
- An estimation process is performed to estimate the quality degradation link set, and in step S414, an external flow other than the internal flow and the resolved external flow identified by the flow identifier may be set as an unresolved external flow.
- FIG. 43 is a flowchart showing the operation of the entire network quality degradation location estimation server SA1 in the present embodiment.
- the server cooperation unit SA11 receives the quality degradation link set, the flow identifier of the resolved external flow, and the line information of the unresolved external flow sent from each partial network quality degradation location estimation server Sl to S3.
- Receive (Step S421), pass the flow identifier of the resolved external flow and the row information of the unresolved external flow to the table processing unit SA12, and pass the quality degradation link set to the quality degradation point estimation unit SA14 (Step S422).
- the table processing unit SA12 receives the information power passed from the server cooperation unit SA11. If it is an estimation process, it is determined whether or not it has information (step S423).
- the table processing unit SA12 operates differently depending on whether it is the information power re-estimation process passed from the server cooperation unit SA11 or not! In this case, the operation is shown.
- the table processing unit SA12 stores the flow identifier of the resolved external flow and the row information of the unresolved external flow of each partial network N1 to N3 received from the server cooperation unit SA11 (step S424).
- the table processing unit SA12 is an unresolved external flow in at least one or more partial networks, and is a resolved external flow in at least one or more partial networks. It is determined whether or not the force satisfies the condition (step S425).
- step S425 If there is a flow satisfying the condition in step S425, the table processing unit SA12 sends the external network as a resolved external flow to the server linkage unit S16 of the partial network quality degradation location estimation servers S1 to S3. A request for re-estimation processing to the re-estimation unit S 18 and the flow identifier of the corresponding flow are notified via the server cooperation unit SA11, and the process is terminated (step S426).
- step S425 If there is no flow satisfying the condition in step S425, the table processing unit SA12 sets the condition that all the partial networks N1 to N3 are unresolved external flows for each external flow. If there is a flow to be satisfied, the row information notified from each of the partial networks N1 to N3 is merged with respect to the flow and stored in the table storage unit SA13 (step S427).
- the quality degradation point estimation unit SA14 force The information stored in the table storage unit SA13 is subjected to the minimum link number estimation process to estimate the quality degradation point (step S428).
- the table processing unit SA12 Line information notified from networks N1 to N3 Then, the table storage unit SA13 stores them without performing the merge process (step S429), and the quality degradation point estimation unit SA14 does not perform the minimum link number estimation process on the information stored in the table storage unit SA13. (Step S430).
- step S425 to step S426, the order of step S427 to step S428, and the order of step S429 to step S430 are as described above, the order of step S425 to step S430 is as described above. Not limited to the order of.
- the table processing unit SA12 For each stored external flow, the table processing unit SA12, if there is a flow that satisfies the condition that it is an unresolved external flow in all the partial networks N1 to N3, The row information notified from the networks N1 to N3 is merged and stored in the table storage unit SA13 (step S432
- the quality degradation point estimation unit SA14 force performs the minimum link number estimation process on the information stored in the table storage unit SA13 to estimate the quality degradation point (step S433).
- the table processing unit SA12 for each stored external flow, (1) a flow that satisfies the condition that all the partial networks N1 to N3 are resolved external flows, or ( 2) If there is a flow that satisfies the condition that it is an unresolved external flow in at least one partial network and a resolved external flow in at least one partial network,
- the row information notified from the networks N1 to N3 is stored in the table storage unit SA13 without performing merge processing (step S434), and the quality degradation point estimation unit SA14 is stored in the table storage unit.
- the minimum number of links is not estimated for the information stored in SA13 (step S435).
- the quality degradation location estimation unit SA14 is configured so that the quality degradation link set constituted by the quality degradation locations estimated in Step S428 and Step S433 and the reestimation process are not instructed, and the quality degradation location estimation unit SA14 The quality degradation link set notified from the server cooperation unit SA11 of the partial network that has not been subjected to the above estimation processing, and the partial network power that was instructed to perform the reestimation processing in step S426 The quality degradation link notified after the reestimation processing The union with the set is notified to the display unit SA15 as a final result (step S436), and the display unit SA15 force displays the union (step S437).
- step S432 to step S433 and the order of step S434 to step S435 are as described above, the order of step S432 to step S435 is not limited to the order described above.
- step S427 and step S432 is the same as the merge processing by the table processing unit SA12 of the overall network quality estimation server SA1 in the second embodiment, and thus description thereof is omitted.
- the flow quality / routed link table of the table storage unit S1 4 of the partial network quality degradation location estimation servers S1 to S3 is the same as that shown in the example of the operation of the third embodiment. ⁇ As shown in Figure 38.
- the partial quality degradation point estimation unit S17 performs the internal flow limited estimation process.
- flows Fl and F2 are external flows and flows F3, F4, F5, and F6 are internal flows.
- flow F2 is an external flow and flows F7, F8, and F9 are internal flows.
- flows Fl and F2 are external flows, and flows FIO and F11 are internal flows.
- L2- 12, L2- 10 ⁇ , ⁇ L2- 24, L2— 10 ⁇ , ⁇ L 2-19, L2— 10 ⁇ are estimated, and ⁇ L3— 10 ⁇ , ⁇ L3— 7 ⁇ are estimated in the partial network N3 Is done.
- a list of all links included in the estimation result is output as a set of quality degradation links.
- L1— 6 L1— 17 ⁇ is output in the partial network N1, and the output is ⁇ L2— 2, L2-4, L2-7, L2-12, L2-24, L2 in the partial network N2.
- the external flow F2 has the quality degradation link set ⁇ L2—
- the external flow F1 has the quality degradation link set ⁇ L3—
- the partial quality degradation location estimation unit S17 the quality degradation link set obtained above, the flow identifier of the resolved external flow determined above, and the line information (flow) of the unresolved external flow (Information of identifier, via link, PrevNet, NextNet, quality flag) is notified to the server linkage unit S15.
- the server cooperation unit S15 notifies the entire network estimation Sano SA1 of these pieces of information.
- the quality inferior link set notified from the partial network quality degradation location estimation servers S1 to S3 of the partial networks N1 to N3 ⁇ L1-6, Ll-17 ⁇ , ⁇ L2- 2, L2-4, L2- 7, L2-12, L2-24, L2-19, L2-10 ⁇ , ⁇ L3-10, L3-7 ⁇ are notified to the quality degradation location estimation unit SA14 To do.
- the server cooperation unit SA11 passes the identifier of the resolved external flow and the line information of the unresolved external flow notified to the partial network quality degradation location estimation servers S1 to S3 to the table processing unit SA12.
- the table processing unit SA12 is server-linked as a process when there is no! / ⁇ ⁇ information if it is a re-estimation process. Stores the identifier of the resolved external flow of each partial network N1 to N3 and the line information of the unresolved external flow received from the part SA11.
- the external flow identifier and the estimation instruction are notified to the re-estimation unit S18 of the partial network that has notified these external flow identifiers (flows F1 and F2) as the resolved external flows.
- the flow F1 is an unresolved external flow in the partial network N1 and a resolved external flow in the partial network N3
- the flow of the corresponding external flow is sent to the reestimator S18 of the partial network N3.
- the identifier and the instruction of the estimation process are notified, and the flow F2 is an unresolved external flow in the partial networks Nl and N3 and is an external flow resolved in the partial network N2, so the re-estimator S1 8 of the partial network N2
- the flow identifier of the corresponding external flow and the instruction of the estimation process are notified.
- FIG. 44 is a diagram for explaining the re-estimation process in the partial network N2.
- the re-estimation unit S18 of the partial network quality estimation server S2 of the partial network N2 estimates the minimum number of links for the rows enclosed by the dotted lines in Fig. 44 (rows F2, F7, F8, F9). Processing is performed. [0288] As a result of this processing, ⁇ L2-10, L2-24 ⁇ is obtained as an estimation result in the re-estimation unit S18 of the partial network quality estimation server S2 of the partial network N2.
- FIG. 45 is a diagram for explaining the re-estimation process in the partial network N3.
- the re-estimation unit S18 of the partial network quality estimation server S3 of the partial network N3 performs the minimum link number estimation processing for the lines surrounded by the dotted lines in Fig. 45 (lines of flows Fl, FIO, and F11). Is called.
- the flow F1 is a resolved external flow
- the flow F2 is an unresolved external flow
- flow F1 is a settled external flow and flow F2 is an unresolved external flow in partial network N3.
- Information indicating the estimation processing is notified from the re-estimation unit S18 to the overall network quality degradation point estimation server SA1 through the server cooperation unit S16.
- the overall network quality estimation Sano SA1 is based on the information after the re-estimation processing for the partial networks N2 and N3 that have been re-estimated, and for the partial network N1 that has not been re-estimated. Based on the information before the re-estimation process, the degradation point is estimated as follows.
- the server cooperation unit SA11 performs the result of the re-estimation processing of the partial networks N2 and N3 (L2
- the server linkage unit SA11 confirms that the flow F2 is a resolved external flow in the partial network N2, the flow F1 is a resolved external flow in the partial network N3, and the flow F2 is an unresolved external flow.
- the table processing unit SA12 is notified of the row information and information indicating the re-estimation process. [0298] In the table processing unit SA12, since processing is performed when there is information indicating that it is a re-estimation processing, information is overwritten first.
- Flow F1 is an unresolved external flow in partial network N1, is a resolved flow in partial network N3, and flow F2 is a resolved flow in partial network N2, and is unresolved in partial network N3
- External flows Fl and F2 are both external flows.
- At least one or more partial networks are unresolved external flows, and at least one or more partial networks are resolved external flows. This applies to flows that satisfy the condition of being.
- Figure 39 shows the flow quality Z link table after collecting the flow information of all networks and removing the non-degraded link by the conventional method.
- the result of the minimum link number estimation process is ⁇ L1 6, Ll-17, L2-10, L2-24, L3-10 ⁇ .
- the estimation results of the present embodiment are ⁇ L1 6, Ll-17, L2-10, L2-24, L3-10 ⁇ . Unlike the estimation results of the third embodiment, the estimation results are based on the conventional method. The estimation result is exactly the same as the one.
- the re-estimation unit S18 of each of the partial networks N1 to N3 performs part of the estimation process again in parallel, thereby It is possible to maintain the accuracy of estimation of quality degradation points without significantly increasing the processing time for estimation processing.
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US11/997,559 US20100157818A1 (en) | 2005-08-31 | 2006-08-30 | Network system, server, quality degradation point estimating method, and program |
CN2006800319951A CN101253740B (zh) | 2005-08-31 | 2006-08-30 | 网络系统、服务器、质量劣化点估计方法 |
JP2007533271A JP4760833B2 (ja) | 2005-08-31 | 2006-08-30 | ネットワークシステム、サーバ、品質劣化箇所推定方法及びプログラム |
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JP2009055113A (ja) * | 2007-08-23 | 2009-03-12 | Nec Corp | 通信ネットワークの品質劣化箇所推定装置、方法、及びプログラム、並びに通信ネットワークシステム |
JP2010171544A (ja) * | 2009-01-20 | 2010-08-05 | Fujitsu Ltd | 異常箇所特定プログラム、異常箇所特定装置、異常箇所特定方法 |
JP2010278639A (ja) * | 2009-05-27 | 2010-12-09 | Fujitsu Ltd | ネットワーク疎通経路切替方法及び送受信装置 |
JP2012182739A (ja) * | 2011-03-02 | 2012-09-20 | Oki Electric Ind Co Ltd | 異常リンク推定装置、異常リンク推定方法、プログラムおよび異常リンク推定システム |
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US20100157818A1 (en) | 2010-06-24 |
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