CN104539447A - Device for analyzing reliability of security data network of passenger transport line signal system - Google Patents

Abstract

The invention provides a device for analyzing the reliability of a security data network of a passenger transport line signal system. The device is composed of a fault injection device, a service flow simulation device, a topology generation device and a reliability evaluation device. The fault injection device is connected with the service flow simulation device and the topology generation device. The service flow simulation device is connected with the topology generation device. The topology generation device and the reliability evaluation device are connected. The security data network of the passenger transport line signal system is a CTCS-2 level and CTCS-3 level train control system for security information transmission based on a special optical fiber signal system (a closed system), the security data network is composed of a repeater, a layer-2 switch and a layer-3 switch and used for guaranteeing safe operation and data of an RBC, a TSRS, a CBI, a TCC and the like in the passenger transport line signal system and transmitting information. The device is used for analyzing the reliability of the security data network of the passenger transport line signal system in an indexed mode, and faulty network nodes and links in the security data network of the passenger transport line signal system can be quickly found out through the device.

Description

A kind of fail-safe analysis device of Line for Passenger Transportation signal system secure data net

Technical field

The present invention relates to Line for Passenger Transportation signal system field, particularly relate to a kind of based on the secure data net fail-safe analysis of Line for Passenger Transportation signal system and the product of evaluation.

Background technology

See Fig. 1 and Fig. 2, Line for Passenger Transportation signal system secure data net be used for based on special optical cable (closed system) signal system security information transmission CTCS-2 level and CTCS-3 grade train controlling system, by repeater, Layer 2 switch, three-tier switch forms, for ensureing the radio block center RBC in Line for Passenger Transportation signal system, temporary speed limitation server TSRS, station interlocking CBI, the safe operations such as train control center TCC, data, the visual plant of transmission information, but ensure the security information transmitting of above equipment room, Line for Passenger Transportation signal system secure data net also will be made in addition to guarantee between station and relay station equipment and with center signal equipment (as radio block center RBC, temporary speed limitation server TSRS) between security information transmitting.Line for Passenger Transportation signal system secure data net adopts technical grade Ethernet exchanging machine equipment (being called for short switch device afterwards) to form redundancy dual-ring network, physical isolation between dual-ring network, and special monomode fiber should be adopted between switch device to connect.According to business demand, VLAN (VLAN) should be divided: service VLAN, for bearing data service; Management VLAN, for network management.The ring interfaces of switch should be 100M or 1000M optical interface, data traffic interfaces is preferably 100M electrical interface, Line for Passenger Transportation signal system secure data net adopts technical grade Ethernet L3 Switching machine equipment (being called for short three-tier switch afterwards) and technical grade Ethernet Layer2 switching machine equipment (being called for short Layer 2 switch afterwards) to form redundancy dual-ring network, physical isolation between dual-ring network, adopts special monomode fiber to connect between switch device.Its function is that the safe operation for train is most important for train control center (TCC), temporary speed limitation server (TSRS), computer interlock (CBI) and wireless blocking system (RBC) provide reliable control information transmission channel.

So need to find a kind of device to the fail-safe analysis of Line for Passenger Transportation signal system secure data net and equipment to be a kind of vital thing, therefore, failing network-node in Line for Passenger Transportation signal system secure data net and link are found rapidly in key effect of the present invention.

Based on above problem, the present invention is relative to traditional approach, its be applied in analyze Line for Passenger Transportation signal system reliability on have obvious increase, The invention also achieves a kind of Analysis and measurement contributing to a kind of index of secure data net reliability in Line for Passenger Transportation signal system field in addition.

Summary of the invention

The technical problem to be solved in the present invention is: 1, to the raising of the secure data net malfunctioning node precision identification in Line for Passenger Transportation signal system field.2, the link reliability improving the secure data net in Line for Passenger Transportation signal system field carries out the quantification of index.For solving the problem, the invention provides following technical scheme:

A fail-safe analysis device for Line for Passenger Transportation signal system secure data net, comprising: fault injection device, service traffics analogue means, Topology g eneration device, reliability evaluation device;

Wherein fault injection device is connected with Topology g eneration device, and service traffics analogue means is connected with Topology g eneration device, and Topology g eneration device is connected with reliability evaluation device;

Fault injection device, for identifying the out of order network node in Line for Passenger Transportation signal system secure data net, comprises network matrix generation module, node factor of influence computing module, link factor of influence computing module, fault location module, Fault Identification module;

Out of order network node in the Line for Passenger Transportation signal system secure data net that Topology g eneration device sends over according to fault injection device reads the network node in Line for Passenger Transportation signal system secure data net and link, and Topology g eneration device comprises three-tier switch information generating module, Layer 2 switch information generating module, link information generation module and network simulation module;

Service traffics analogue means is made up of data flow module, data flow synthesis module and multiple data flow generation module, produces data flow to Topology g eneration device;

Reliability evaluation device is made up of reliability information acquisition module, reliability information processing module, reliability effect factor computing module, Calculation of Reliability module, reliability evaluation Index module, reliability lateral appraisement module, the longitudinal evaluation module of reliability and reliability evaluation module, carries out fail-safe analysis to Line for Passenger Transportation signal system secure data net.：

Network matrix generation module carries out storing and calculating for all network nodes in Line for Passenger Transportation signal system secure data net and the automatic generator matrix of link;

Node factor of influence computing module and link factor of influence computing module read the matrix that network matrix generation module generates automatically, and the node factor of influence of all network nodes calculated respectively in Line for Passenger Transportation signal system secure data net and the link factor of influence of link;

Node factor of influence is the shortest path number of the network node in Line for Passenger Transportation signal system secure data net; Link factor of influence is L _ij=Load _ij/ ∑ _{i ≠ j}l (Path _ij), wherein Path _ijrepresent the link between i-th network node and a jth network node in Line for Passenger Transportation signal system secure data net, wherein l (Path _ij) represent through Path _ijshortest path number, Load _ijrepresent through Path _ijuninterrupted, wherein i, j=1 ... n, n are natural number;

Fault location module is according to the result of calculation of the result of calculation of node factor of influence computing module and link factor of influence computing module, be normalized and judge, when the value after the normalized obtained is greater than 0.3, the network node of Line for Passenger Transportation signal system secure data net is identified as the out of order network node in Line for Passenger Transportation signal system secure data net; The link of the out of order network node in Line for Passenger Transportation signal system secure data net is out of order link;

The network node of Line for Passenger Transportation signal system secure data net has two kinds of operating state: normal operating conditions ON and malfunction OFF, and Fault Identification module becomes malfunction OFF the operating state of the out of order network node in Line for Passenger Transportation signal system secure data net; Last device id and the malfunction OFF sending the out of order network node in Line for Passenger Transportation signal system secure data net again to Topology g eneration reading device.

The information of three-tier switch information generating module in Topology g eneration device to the three-tier switch in Line for Passenger Transportation signal system secure data net reads and generates corresponding information; Wherein three-tier switch information generating module comprises three-tier switch graphics generation unit, three-tier switch data link layer protocol reading unit, three-tier switch network layer protocol reading unit and three-tier switch NMP reading unit;

Three-tier switch graphics generation unit, for reading the topology information of three-tier switch in Line for Passenger Transportation signal system secure data net, generates the state scene graph of three-tier switch;

Three-tier switch data link layer protocol reading unit, on the state scene graph basis of the three-tier switch generated at three-tier switch graphics generation unit, reads the link layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net;

Three-tier switch network layer protocol reading unit, on the state scene graph basis of the three-tier switch generated at three-tier switch graphics generation unit, reads the network layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net;

Three-tier switch NMP reading unit, on the state scene graph basis of the three-tier switch generated at three-tier switch graphics generation unit, reads the NMP of three-tier switch in Line for Passenger Transportation signal system secure data net;

Layer 2 switch information generating module in Topology g eneration device reads the layer 2-switched information in Line for Passenger Transportation signal system secure data net and generates corresponding information; Wherein Layer 2 switch information generating module comprises Layer 2 switch graphics generation unit, Layer 2 switch data link layer protocol reading unit and Layer 2 switch NMP reading unit;

Layer 2 switch graphics generation unit, for reading layer 2-switched topology information in Line for Passenger Transportation signal system secure data net, generates layer 2-switched state scene graph;

Layer 2 switch data link layer protocol reading unit, on the layer 2-switched state scene graph basis that Layer 2 switch graphics generation unit generates, reads layer 2-switched link layer protocol in Line for Passenger Transportation signal system secure data net;

Layer 2 switch NMP reading unit, on the layer 2-switched state scene graph basis that Layer 2 switch graphics generation unit generates, reads layer 2-switched NMP in Line for Passenger Transportation signal system secure data net;

Link information generation module, for generating the information of the link in Line for Passenger Transportation signal system secure data net, comprises link graphics generation unit, Linktype selected cell, link data packet format setting unit and link bandwidth setting unit;

Link graphics generation unit, for reading the topology information of Line for Passenger Transportation signal system secure data net link, generates the state scene graph of link;

Linktype selected cell, for selecting the type parameter of the link in Line for Passenger Transportation signal system secure data net;

Link data packet format setting unit, for reading and storing the data packet format transmitted of the link in Line for Passenger Transportation signal system secure data net;

Link bandwidth setting unit, reads and stores the bandwidth that the link in Line for Passenger Transportation signal system secure data net provides;

Network simulation module includes whole net topology generation unit, service traffics resolution unit, Fault analytical unit, data statistics unit;

Whole net topology generation unit, three-tier switch information generating module, Layer 2 switch information generating module and link information generation module are combined, generate the network topology structure in whole Line for Passenger Transportation signal system secure data net, and according to the state of service traffics resolution unit and Fault analytical unit, data are sent to data statistics unit;

Service traffics resolution unit resolves the source address of the data flow that service traffics analogue means sends over and destination address and timestamp respectively, and in whole net topology generation unit configuration service flow; The timestamp of the data flow parsed is for calculating the time delay in the network topology structure in Line for Passenger Transportation signal system secure data net between any two nodes;

Fault analytical unit receives device id and the malfunction OFF of the out of order network node in the Line for Passenger Transportation signal system secure data net sent in Fault Identification module; And select corresponding node and link according in network topology structure in the Line for Passenger Transportation signal system secure data net generated of the device id of the out of order network node in Line for Passenger Transportation signal system secure data net, the operating state of the out of order network node then arranged in Line for Passenger Transportation signal system secure data net according to Fault Identification module is set to malfunction OFF;

Data statistics unit is used for the statistics of original time delay and original packet loss, and exports delay state figure and packet loss state diagram with display.

Multiple data flow generation modules in service traffics analogue means are used for producing data flow; Every bar data flow comprises source node, destination node, the size of packet, the interval of giving out a contract for a project of packet;

Source node comprises train control center, temporary speed limitation server, radio block center, station interlocking; Destination node comprises train control center, station interlocking, radio block center, temporary speed limitation server;

There are eight kinds of situations in the connection of source node and destination node: between train control center and train control center, between train control center and station interlocking, between temporary speed limitation server and radio block center, between temporary speed limitation server and train control center, between temporary speed limitation server and temporary speed limitation server, between radio block center and station interlocking, between radio block center and radio block center, between station interlocking and station interlocking;

For in eight kinds of situations, the size of the packet in the data flow that often kind of situation is corresponding is by auto-correlation function determine; Wherein k is positive integer, relevant with the time interval, and H is parameter set arbitrarily according to actual conditions in eight kinds of situations in a stream, and span is 0.5 ~ 1, thus tries to achieve C (k);

In eight kinds of situations, the interval of giving out a contract for a project of the packet in the data flow that often kind of situation is corresponding is by the function about the time determine; Wherein d is positive integer, and be the parameter in a stream set by eight kinds of situation practical operation situation, span is 10 ~ 100;

Data flow synthesis module, data flow is carried out superposition and is obtained superposition of data stream by the mode adopting time domain to be added;

Data flow module, exports superposition of data stream to Topology g eneration device.

Reliability information acquisition module comprises collection statistic unit, transmission delay information cache unit, packet loss information cache unit, and is connected with data statistics unit;

The original time delay that reliability information acquisition module provides data statistics unit and original packet loss gather, and collection result is processed stored in transmission delay information cache unit and packet loss information cache unit respectively, the data result of process sends to reliability information processing module;

Reliability information processing module is connected with reliability information acquisition module, carries out average sampling to the data result that reliability information acquisition module exports, and obtains sampling transmission delay data and sampling packet loss data, and form matrix A by average sampling _{(m × 2)}, wherein m represents the dimension of sampling transmission delay data or sampling packet loss data;

Reliability effect factor computing module is connected with reliability information processing module, for to sampling transmission delay data and sampling packet loss data according to reliability effect because subformula carries out factor of influence calculating, obtain transmission delays affect Summing Factor packet loss factor of influence, judge sampling transmission delay data and the influence degree of packet loss data for the reliability of Line for Passenger Transportation signal system secure data net of sampling; Reliability effect comprises data prediction formula and factor of influence computing formula because of subformula, and wherein data prediction formula is wherein x is matrix A _{(m × 2)}an xth dimension, the span of x is 1 ~ m, m is natural number; Y value 1 and 2, as y=1, a _xyrepresent sampling transmission delay data, b _xyfor the value after data prediction, be transmission delay information; As y=2, a _xyrepresent sampling packet loss data; b _xyfor the value after data prediction, be packet loss information; Factor of influence computing formula is wherein: as y=1, W _yand e _ybe respectively the entropy of transmission delays affect Summing Factor transmission delay information; As y=2, W _yand e _ybe respectively the entropy of packet loss factor of influence and packet loss information;

Calculation of Reliability module is connected with reliability effect factor computing module and reliability information processing module, comprises reliability information buffer unit and reliability algorithm unit;

Reliability information buffer unit is used for buffer memory transmission delay information, packet loss information, transmission delays affect Summing Factor packet loss factor of influence;

Reliability algorithm unit is connected with reliability information buffer unit, calculates longitudinal reliability according to the data that reliability information buffer unit provides by reliability algorithm, and longitudinal reliability is sent the longitudinal evaluation module of reliability, and reliability algorithm is ${\mathrm{REL}}_x=\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\max (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\min (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2};$ Wherein, REL _xrepresent longitudinal reliability of the xth dimension formed through transmission delay information and packet loss information;

In Line for Passenger Transportation signal system secure data network simulation collection and evaluator, the longitudinal evaluation module of reliability is connected with Calculation of Reliability module, for more longitudinal reliability;

Reliability evaluation Index module is used for providing evaluation index, comprises transmission delay higher limit and packet loss higher limit;

Reliability lateral appraisement module is connected with reliability evaluation Index module and reliability information processing module, is made up of transmission delay reliability calculating unit, the packet loss reliability calculating unit deposit receipt unit that eases up;

Transmission delay reliability calculating unit is used for comparing transmission delay higher limit and transmission delay information, if transmission delay higher limit is greater than transmission delay information, then transmission delay reliability is 1, if transmission delay higher limit is less than or equal to transmission delay information, then transmission delay reliability is 0; Packet loss reliability calculating unit is used for comparing packet loss higher limit and packet loss information, if packet loss higher limit is greater than packet loss information, then packet loss reliability is 1, if packet loss higher limit is less than or equal to packet loss information, then packet loss reliability is 0;

Buffer unit is used for the horizontal reliability of buffer memory Line for Passenger Transportation signal system secure data net; Horizontal reliability transmission delay reliability and packet loss reliability sum represent;

Reliability evaluation module is connected with reliability lateral appraisement module and the longitudinal evaluation module of reliability, comprises comparing unit and overall merit unit;

Comparing unit is used for more horizontal reliability and longitudinal reliability; Overall merit unit is connected with comparing unit, according to the result compared, obtains the reliability of Line for Passenger Transportation signal system secure data net; Horizontal reliability is higher, and the reliability of Line for Passenger Transportation signal system secure data net is higher, and when horizontal reliability is identical, longitudinal reliability is larger, then the reliability of Line for Passenger Transportation signal system secure data net is higher.

Accompanying drawing explanation

Fig. 1 is the system assumption diagram of Line for Passenger Transportation signal system secure data net of the present invention;

Fig. 2 is the double-deck system assumption diagram of Line for Passenger Transportation signal system secure data net of the present invention;

Fig. 3 is the fail-safe analysis device system assumption diagram of Line for Passenger Transportation signal system secure data net of the present invention;

Fig. 4 is the structural representation of the fault injection device in the present invention;

Fig. 5 is the structural representation of the Topology g eneration device in the present invention;

Fig. 6 is the structural representation of the service traffics analogue means in the present invention;

Fig. 7 is the structural representation of the reliability evaluation device in the present invention;

Embodiment

In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention will be described in detail.It should be noted that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention, the product that can realize said function belongs to equivalent to be replaced and improves, and is all included within protection scope of the present invention.Concrete grammar is as follows:

Embodiment 1:

As depicted in figs. 1 and 2: Line for Passenger Transportation signal system secure data net be used for based on special optical cable (closed system) signal system security information transmission CTCS-2 level and CTCS-3 grade train controlling system, by repeater, Layer 2 switch, three-tier switch forms, for ensureing the visual plant of the trouble free service of the above equipment such as radio block center RBC, temporary speed limitation server TSRS, station interlocking CBI, train control center TCC in Line for Passenger Transportation signal system, wherein train control center TCC comprises the train control center at station and the train control center TCC of relay station.

But ensure the security information transmitting of equipment room, Line for Passenger Transportation signal system secure data net also will be made to guarantee between station and relay station equipment and and center signal equipment (as radio block center RBC, temporary speed limitation server TSRS) between carry out security information transmitting.Line for Passenger Transportation signal system secure data net adopts technical grade Ethernet L3 Switching machine equipment (international abbreviation three-tier switch) and technical grade Ethernet Layer2 switching machine equipment (international abbreviation Layer 2 switch) to form redundancy dual-ring network, physical isolation between dual-ring network, adopts special monomode fiber to connect between switch device.As shown in Table 1 and Table 2, the performance requirement of Layer 2 switch and three-tier switch is as follows:

The performance requirement of table 1 Layer2 switching machine equipment

The performance requirement of table 2 L3 Switching machine equipment

As shown in Figure 3, in practical operation, the fail-safe analysis device of Line for Passenger Transportation signal system secure data net is generally provided with fault injection device, service traffics analogue means, Topology g eneration device, reliability evaluation device four major part, completes different functions respectively;

In the fail-safe analysis device of Line for Passenger Transportation signal system secure data net, fault injection device is connected with Topology g eneration device, service traffics analogue means is connected with Topology g eneration device, and Topology g eneration device is connected with reliability evaluation device;

Out of order network node in fault injection device identification Line for Passenger Transportation signal system secure data net, comprises network matrix generation module, node factor of influence computing module, link factor of influence computing module, fault location module and Fault Identification module;

Topology g eneration device processes and reads the out of order network node in the Line for Passenger Transportation signal system secure data net sended over to the network node in Line for Passenger Transportation signal system secure data net and link according to fault injection device, as shown in Figure 4, Topology g eneration device comprises three-tier switch information generating module, Layer 2 switch information generating module, link information generation module and network simulation module;

Service traffics analogue means is made up of data flow module, data flow synthesis module and multiple data flow generation module, and produces data flow to Topology g eneration device; Topology g eneration device generally can with hardware, or software, or the mode that hardware and software combines realizes;

Reliability evaluation device is made up of reliability information acquisition module, reliability information processing module, reliability effect factor computing module, Calculation of Reliability module, reliability evaluation Index module, reliability lateral appraisement module, the longitudinal evaluation module of reliability and reliability evaluation module, carries out fail-safe analysis to Line for Passenger Transportation signal system secure data net.

Network matrix generation module carries out storing and calculating for all network nodes in Line for Passenger Transportation signal system secure data net and the automatic generator matrix of link;

Node factor of influence computing module and link factor of influence computing module read the matrix that network matrix generation module generates automatically, and the node factor of influence of all network nodes calculated respectively in Line for Passenger Transportation signal system secure data net and the link factor of influence of link;

The shortest path number of the network node in the Line for Passenger Transportation signal system secure data net that node factor of influence is through; Link factor of influence is L _ij=Load _ij/ ∑ _{i ≠ j}l (Path _ij), wherein Path _ijthe link between i-th network node and a jth network node in the Line for Passenger Transportation signal system secure data net represented, l (Path here _ij) represent through Path _ijshortest path number, Load _ijrepresent through Path _ijuninterrupted, wherein i, j=1 ... n, n are natural number;

Fault location module is according to the result of calculation of the result of calculation of node factor of influence computing module and link factor of influence computing module, be normalized and judge, the basis judged is when the value after this normalized is greater than 0.3, and the network node of Line for Passenger Transportation signal system secure data net is identified as the out of order network node in Line for Passenger Transportation signal system secure data net; The link of the out of order network node in Line for Passenger Transportation signal system secure data net is out of order link;

The network node of Line for Passenger Transportation signal system secure data net has two kinds of operating states also can be called state: normal operating conditions ON and malfunction OFF, so the work of Fault Identification module is exactly that the operating state of the out of order network node in Line for Passenger Transportation signal system secure data net is become malfunction OFF; Device id and the malfunction OFF of the out of order network node in Line for Passenger Transportation signal system secure data net finally also will be sent again to Topology g eneration reading device.

As shown in Figure 5, first the three-tier switch information generating module in Topology g eneration device reads the information of the three-tier switch in Line for Passenger Transportation signal system secure data net and generates corresponding information; Wherein three-tier switch information generating module comprises three-tier switch graphics generation unit, three-tier switch data link layer protocol reading unit, three-tier switch network layer protocol reading unit and three-tier switch NMP reading unit;

Three-tier switch graphics generation unit, for reading the topology information of three-tier switch in Line for Passenger Transportation signal system secure data net, then generates the state scene graph of three-tier switch according to the topology information read;

On the state scene graph basis of the three-tier switch that three-tier switch data link layer protocol reading unit generates at three-tier switch graphics generation unit, read the link layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net, then three-tier switch network layer protocol reading unit is adopted in the same way, on the state scene graph basis of the three-tier switch generated at three-tier switch graphics generation unit, read the network layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net, last three-tier switch NMP reading unit, the state scene graph basis of the three-tier switch generated at three-tier switch graphics generation unit is read the NMP of three-tier switch in Line for Passenger Transportation signal system secure data net,

Layer 2 switch information generating module in Topology g eneration device reads the layer 2-switched information in Line for Passenger Transportation signal system secure data net and generates corresponding information; Wherein Layer 2 switch information generating module comprises Layer 2 switch graphics generation unit, Layer 2 switch data link layer protocol reading unit and Layer 2 switch NMP reading unit;

Layer 2 switch graphics generation unit is the same with the function of three-tier switch graphics generation unit, and it is for reading layer 2-switched topology information in Line for Passenger Transportation signal system secure data net, generating layer 2-switched state scene graph;

Layer 2 switch data link layer protocol reading unit is the same with the function of three-tier switch data link layer protocol reading unit, on the layer 2-switched state scene graph basis that Layer 2 switch graphics generation unit generates, read layer 2-switched link layer protocol in Line for Passenger Transportation signal system secure data net;

Layer 2 switch NMP reading unit is the same with three-tier switch NMP reading unit function, on the layer 2-switched state scene graph basis that Layer 2 switch graphics generation unit generates, read layer 2-switched NMP in Line for Passenger Transportation signal system secure data net;

Link information generation module, for generating the information of the link in Line for Passenger Transportation signal system secure data net, comprises link graphics generation unit, Linktype selected cell, link data packet format setting unit and link bandwidth setting unit;

The effect of link graphics generation unit is the topology information reading Line for Passenger Transportation signal system secure data net link, generates the state scene graph of link;

The effect of Linktype selected cell is the type parameter of the link selected in Line for Passenger Transportation signal system secure data net;

The effect of link data packet format setting unit is read and stores the data packet format transmitted of the link in Line for Passenger Transportation signal system secure data net;

The effect of link bandwidth setting unit is read and stores the bandwidth that the link in Line for Passenger Transportation signal system secure data net provides;

Network simulation module includes whole net topology generation unit, service traffics resolution unit, Fault analytical unit, data statistics unit;

The effect of whole net topology generation unit first three-tier switch information generating module, Layer 2 switch information generating module and link information generation module is combined, generate the network topology structure in whole Line for Passenger Transportation signal system secure data net, then according to the state of service traffics resolution unit and Fault analytical unit, data are sent to data statistics unit;

Service traffics resolution unit resolves the source address of the data flow that service traffics analogue means sends over and destination address and timestamp respectively, and in whole net topology generation unit configuration service flow; The timestamp of the data flow parsed is for calculating the time delay in the network topology structure in Line for Passenger Transportation signal system secure data net between any two nodes;

Fault analytical unit receives device id and the malfunction OFF of the out of order network node in the Line for Passenger Transportation signal system secure data net sent in Fault Identification module; And select corresponding node and link according in network topology structure in the Line for Passenger Transportation signal system secure data net generated of the device id of the out of order network node in Line for Passenger Transportation signal system secure data net, the operating state of the out of order network node then arranged in Line for Passenger Transportation signal system secure data net according to Fault Identification module is set to malfunction OFF;

Data statistics unit is used for the statistics of original time delay and original packet loss, and exports delay state figure and packet loss state diagram.

As shown in Figure 6, the multiple data flow generation modules in service traffics analogue means are used for producing data flow; Every bar data flow comprises source node, destination node, the size of packet, the interval of giving out a contract for a project of packet; Source node and destination node determine the initial of data flow and end, namely move towards to determine, interval of giving out a contract for a project determines the time interval of former and later two Packet Generations, and data package size determines the size of the packet that this moment sends,

Embodiment

In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention will be described in detail.It should be noted that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention, the product that can realize said function belongs to equivalent to be replaced and improves, and is all included within protection scope of the present invention.Concrete grammar is as follows:

Embodiment 1:

As depicted in figs. 1 and 2: Line for Passenger Transportation signal system secure data net be used for based on special optical cable (closed system) signal system security information transmission CTCS-2 level and CTCS-3 grade train controlling system, by repeater, Layer 2 switch, three-tier switch forms, for ensureing the visual plant of the trouble free service of the above equipment such as radio block center RBC, temporary speed limitation server TSRS, station interlocking CBI, train control center TCC in Line for Passenger Transportation signal system, wherein train control center TCC comprises the train control center at station and the train control center TCC of relay station.

But ensure the security information transmitting of equipment room, Line for Passenger Transportation signal system secure data net also will be made to guarantee between station and relay station equipment and and center signal equipment (as radio block center RBC, temporary speed limitation server TSRS) between carry out security information transmitting.Line for Passenger Transportation signal system secure data net adopts technical grade Ethernet L3 Switching machine equipment (international abbreviation three-tier switch) and technical grade Ethernet Layer2 switching machine equipment (international abbreviation Layer 2 switch) to form redundancy dual-ring network, physical isolation between dual-ring network, adopts special monomode fiber to connect between switch device.As shown in Table 1 and Table 2, the performance requirement of Layer 2 switch and three-tier switch is as follows:

The performance requirement of table 1 Layer2 switching machine equipment

x is matrix A _{(m × 2)}an xth dimension, span is 1 ~ m, m is natural number; Y value 1 and 2, as y=1, a _xyrepresent sampling transmission delay data, b _xyfor the value after data prediction, be transmission delay information; As y=2, a _xyrepresent sampling packet loss data; b _xyfor the value after data prediction, be packet loss information; Factor of influence computing formula is

$e_y=-\underset{x=1}{\overset{m}{\mathrm{\Σ}}}(b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}})\·\log (b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}}),W_y=(1/\frac{e_y}{\log \left(m\right)})/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}(1/\frac{e_y}{\log \left(m\right)}),$ Wherein: as y=1, W _yand e _ybe respectively the entropy of transmission delays affect Summing Factor transmission delay information; As y=2, W _yand e _ybe respectively the entropy of packet loss factor of influence and packet loss information; If special circumstances b _xy=0, then directly make $(b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}})\·\log (b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}})=0.$

Calculation of Reliability module in reliability evaluation device is connected with reliability effect factor computing module and described reliability information processing module, is made up of reliability information buffer unit and reliability algorithm unit; Reliability information buffer unit is used for buffer memory transmission delay information, packet loss information, transmission delays affect Summing Factor packet loss factor of influence; Reliability algorithm unit is connected with reliability information buffer unit, calculates longitudinal reliability according to the data that reliability information buffer unit provides by reliability algorithm, and longitudinal reliability is sent to the longitudinal evaluation module of reliability, and reliability algorithm is

${\mathrm{REL}}_x=\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\max (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\min (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2};$ Wherein, REL _xfor the longitudinal reliability of an xth dimension be made up of transmission delay information and packet loss information, span should be no more than 1.

The longitudinal evaluation module of reliability in reliability evaluation device is connected with Calculation of Reliability module, for more longitudinal reliability;

Reliability evaluation Index module in reliability evaluation device is used for providing evaluation index, comprises transmission delay higher limit and packet loss higher limit; According to the requirement of Line for Passenger Transportation signal system secure data net, transmission delay higher limit and packet loss higher limit are respectively 50ms and 0.1%.

Reliability lateral appraisement module in reliability evaluation device is connected with reliability evaluation Index module and reliability information processing module, comprises transmission delay reliability calculating unit, packet loss reliability calculating unit and buffer unit; Transmission delay reliability calculating unit is used for comparing transmission delay higher limit and transmission delay information, if transmission delay higher limit is greater than transmission delay information, then transmission delay reliability is 1, if transmission delay higher limit is less than or equal to transmission delay information, then transmission delay reliability is 0; Packet loss reliability calculating unit is used for comparing packet loss higher limit and packet loss information, if packet loss higher limit is greater than packet loss information, then packet loss reliability is 1, if packet loss higher limit is less than or equal to packet loss information, then packet loss reliability is 0; Transmission delay reliability and packet loss reliability sum are used for representing horizontal reliability, and horizontal reliability is stored in buffer unit;

Reliability evaluation module in reliability evaluation device is connected with reliability lateral appraisement module and the longitudinal evaluation module of reliability, comprises comparing unit and overall merit unit; Comparing unit is used for more horizontal reliability and longitudinal reliability; Overall merit unit is connected with comparing unit, according to the result compared, obtains the reliability of Line for Passenger Transportation signal system secure data net; Horizontal reliability is higher, and the reliability of Line for Passenger Transportation signal system secure data net is higher, and when horizontal reliability is identical, longitudinal reliability is larger, then the reliability of Line for Passenger Transportation signal system secure data net is higher.

Embodiment 2:

As depicted in figs. 1 and 2, Line for Passenger Transportation signal system secure data net is by being by repeater, Layer 2 switch, three-tier switch forms, for ensureing radio block center RBC, temporary speed limitation server TSRS, station interlocking CBI, the train control center TCC in Line for Passenger Transportation signal system, wherein train control center TCC comprises the train control center at station and the train control center TCC of relay station, waits the safe operation of above equipment, data, transmission information.

In embodiment 2 as shown in Figure 3: the fail-safe analysis device of Line for Passenger Transportation signal system secure data net is by fault injection device, service traffics analogue means, Topology g eneration device and reliability evaluation device;

Fault injection device comprises: network matrix generation module, node factor of influence computing module, link factor of influence computing module, fault location module, and Fault Identification module forms;

As shown in Figure 4: the node that the network topology structure of the Line for Passenger Transportation signal system secure data net of network matrix generation module handle is all automatically generates node matrix equation and stores;

The node factor of influence of each node in the network topology structure of the Line for Passenger Transportation signal system secure data net that node factor of influence computing module calculates; The number be about to through the shortest path of node is expressed as node factor of influence;

The link factor of influence of each node of network topology structure of the Line for Passenger Transportation signal system secure data net that link factor of influence computing module calculates; The factor of influence of network topology structure link of Line for Passenger Transportation signal system secure data net be expressed as L _ij=Load _ij/ ∑ _{i ≠ j}l (Path _ij), wherein Path _ijnode i in the network topology structure of the Line for Passenger Transportation signal system secure data net of expression process and the link of node j, l (Path _j) represent through Path _ijshortest path number, Load _ijrepresent through Path _ijuninterrupted, wherein i, j=1 ... all number of links in the network topology structure of the Line for Passenger Transportation signal system secure data net that L, L represent;

Fault location module is according to the result of calculation of node factor of influence computing module and link factor of influence computing module, the node factor of influence of each node of network topology structure of right Line for Passenger Transportation signal system secure data net and the link factor of influence of each node of network topology structure of Line for Passenger Transportation signal system secure data net be normalized respectively and judge, when the value of the normalization reprocessing obtained is greater than 0.3, using Line for Passenger Transportation signal system secure data net network topology structure in node and link as direct fault location point; Node in the network topology structure of Line for Passenger Transportation signal system secure data net and link have two kinds of operating states: normal operating conditions and malfunction, normal operating conditions ON represents, malfunction OFF represents, Fault Identification module becomes OFF the operating state of direct fault location point;

As shown in Figure 5: Topology g eneration device, its function Line for Passenger Transportation signal system secure data net is carried out to the agreement reading of whole net topology generation and this net interior joint and link.Comprise three-tier switch information generating module, Layer 2 switch information generating module, link information generation module, whole net topology generation module and network simulation module.

Three-tier switch information generating module, its function generates the information of the three-tier switch in Line for Passenger Transportation signal system secure data net.Comprise three-tier switch graph generation module, three-tier switch data link layer protocol read module, three-tier switch network layer protocol read module and three-tier switch NMP read module.

Three-tier switch graph generation module, reads the graphical information of three-tier switch in Line for Passenger Transportation signal system secure data net, generates three-tier switch figure.

Three-tier switch data link layer protocol read module, read the link layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net, these agreements comprise: IEEE 802.1p priority protocol, IEEE802.3x stream protocol, IEEE 802.3u 100Base-TX Fast Ethernet agreement, IEEE 802.3z1000Base-TX gigabit Ethernet agreement, VLAN (VLAN) agreement of IEEE 802.1q, IEEE802.1d STP (spanning tree) agreement, IEEE802.1w RSTP (rapid spanning-tree) agreement, IEEE802.3adLACP (link aggregation agreement).

Three-tier switch network layer protocol read module, read the network layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net, these agreements comprise: RIPv1/v2 Routing Protocol.

Three-tier switch NMP read module, read the NMP of three-tier switch in Line for Passenger Transportation signal system secure data net, these agreements comprise: RFC854Telnet (Telnet) agreement, RFC2236IGMP Snooping (inter-network fabric anomaly) agreement, RFC1757RMON (4 groups of remote monitoring) agreement, RFC1213SNMP (simple network management) agreement.

Layer 2 switch graph generation module, reads layer 2-switched graphical information in Line for Passenger Transportation signal system secure data net, generates Layer 2 switch figure.

Layer 2 switch data link layer protocol read module, read layer 2-switched link layer protocol in Line for Passenger Transportation signal system secure data net, these agreements comprise: IEEE 802.1p priority protocol, IEEE802.3x stream protocol, IEEE 802.3u 100Base-TX Fast Ethernet agreement, IEEE 802.3z1000Base-TX gigabit Ethernet agreement, VLAN (VLAN) agreement of IEEE 802.1q, IEEE802.1d STP (spanning tree) agreement, IEEE802.1w RSTP (rapid spanning-tree) agreement, IEEE802.3adLACP (link aggregation agreement).

Layer 2 switch NMP read module, read layer 2-switched NMP in Line for Passenger Transportation signal system secure data net, these agreements comprise: RFC854Telnet (Telnet) agreement, RFC2236IGMP Snooping (inter-network fabric anomaly) agreement, RFC1757RMON (4 groups of remote monitoring) agreement, RFC1213SNMP (simple network management) agreement.

Link information generation module, its function generates the link information in the special signal system secure data net of visitor, comprises link graphics generation unit, Linktype selected cell, link data packet format setting unit and link bandwidth setting unit;

Link graphics generation unit, for reading the topology information of Line for Passenger Transportation signal system secure data net link, the state scene graph of link generation;

Linktype selected cell, for selecting the type parameter of the link in described Line for Passenger Transportation signal system secure data net; Link data packet format setting unit, for reading and storing the data packet format transmitted of the link in described Line for Passenger Transportation signal system secure data net; Link bandwidth setting unit, reads and stores the bandwidth that the link in described Line for Passenger Transportation signal system secure data net provides.

Network simulation module described in network simulation module includes whole net topology generation unit, service traffics resolution unit, Fault analytical unit, data statistics unit;

Whole net topology generation unit, three-tier switch information generating module, Layer 2 switch information generating module and link information generation module are combined, generate the network topology structure in whole Line for Passenger Transportation signal system secure data net, and according to service traffics resolution unit and the state of Fault analytical unit data are sent to data statistics unit;

Service traffics resolution unit is resolved source address and the destination address of the data flow that service traffics analogue means sends over and is parsed timestamp, configuration service flow in whole net topology generation unit; Timestamp is for calculating the time delay in the network topology structure in Line for Passenger Transportation signal system secure data net between any two nodes; Fault analytical unit receives device id and the malfunction OFF of the out of order network node in the Line for Passenger Transportation signal system secure data net sent in Fault Identification module; And select corresponding node and link according in network topology structure in the Line for Passenger Transportation signal system secure data net generated of the device id of the out of order network node in Line for Passenger Transportation signal system secure data net, the operating state of the out of order network node arranged in Line for Passenger Transportation signal system secure data net according to Fault Identification module is set to malfunction OFF; Data statistics unit is used for the statistics of original time delay and original packet loss and shows.

The whole net topology generation module of Line for Passenger Transportation signal system secure data net, combines three-tier switch information generating module, Layer 2 switch information generating module and link information generation module, generates whole net topology.

As shown in Figure 6: service traffics analogue means is by data flow synthesis module, and data flow module and multiple data flow generation module form; Multiple data flow generation module is used for producing data flow; Every bar data flow comprises source node, destination node, the size of packet, the interval of giving out a contract for a project of packet; Source node comprises train control center, temporary speed limitation server, radio block center, station interlocking; Destination node comprises train control center, station interlocking, radio block center, temporary speed limitation server;

There are eight kinds of situations in the connection of source node and destination node: between train control center and train control center, between train control center and station interlocking, between temporary speed limitation server and radio block center, between temporary speed limitation server and train control center, between temporary speed limitation server and temporary speed limitation server, between radio block center and station interlocking, between radio block center and radio block center, between station interlocking and station interlocking;

For in eight kinds of situations, auto-correlation function C (k) of the data package size in the data flow that often kind of situation is corresponding is $C\left(k\right)=\frac{1}{2}{[(K+1)}^{2H}-2k^{2H}+{(k-1)}^{2H}]$

Wherein k is positive integer, relevant with the time interval, and H is according to the parameter that the actual conditions in eight kinds of situations set arbitrarily in data flow, and span is 0.5 ~ 1, thus tries to achieve C (k);

In eight kinds of situations, the interval of giving out a contract for a project of the packet of often kind of situation is by the function about the time determine; Wherein d is positive integer, is in a stream according in eight kinds of situations, the parameter set arbitrarily according to actual conditions, and span is 10 ~ 100;

Data stream combiner in service traffics simulator, the mode adopting time domain to be added by data flow carry out superposition and obtain superposition of data stream;

Data flow module in service traffics simulator, exports superposition of data stream to data network simulator;

As shown in Figure 7: reliability evaluation device, reliability information acquisition module, reliability information processing module, reliability effect factor computing module, Calculation of Reliability module, reliability longitudinal evaluation module, reliability evaluation Index module, reliability lateral appraisement module and reliability evaluation module is comprised.

In reliability evaluation device, reliability information acquisition module is connected with the data statistics unit in Topology g eneration device, is made up of collection statistic unit, transmission delay information cache unit and packet loss information cache unit; Gather original time delay that statistic unit provides data statistics unit and original packet loss gathers, and sending to transmission delay information cache unit and packet loss information cache unit to process collection result, the data result of process is stored in reliability information processing module;

In reliability evaluation device, reliability information processing module is connected with reliability information acquisition module, because original time delay and original packet loss data volume are large, need to carry out average sampling to original time delay and original packet loss, selects representational information; Sampling transmission delay data and sampling packet loss data matrix A is obtained after average sampling _{(m × 2)}represent, wherein m is the dimension of sampling transmission delay data and sampling packet loss data;

Reliability effect factor computing module in reliability evaluation device is connected with reliability information processing module, because of subformula, sampling transmission delay data and sampling packet loss data are calculated according to reliability effect, obtain transmission delays affect Summing Factor packet loss factor of influence; Reliability effect comprises data prediction formula and factor of influence computing formula because of subformula, and wherein data prediction formula is x is matrix A _{(m × 2}) an xth dimension, span is 1 ~ m, m is natural number; Y value 1 and 2, as y=1, a _xyrepresent sampling transmission delay data, b _xyfor the value after data prediction, be transmission delay information; As y=2, a _xyrepresent sampling packet loss data; b _xyfor the value after data prediction, be packet loss information; Factor of influence computing formula is

$e_y=-\underset{x=1}{\overset{m}{\mathrm{\Σ}}}(b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}})\·\log (b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}}),W_y=(1/\frac{e_y}{\log \left(m\right)})/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}(1/\frac{e_y}{\log \left(m\right)}),$ Wherein: as y=1, W _yand e _ybe respectively the entropy of transmission delays affect Summing Factor transmission delay information; As y=2, W _yand e _ybe respectively the entropy of packet loss factor of influence and packet loss information;

Calculation of Reliability module in reliability evaluation device is connected with reliability effect factor computing module and described reliability information processing module, is made up of reliability information buffer unit and reliability algorithm unit; Reliability information buffer unit is used for buffer memory transmission delay information, packet loss information, transmission delays affect Summing Factor packet loss factor of influence; Reliability algorithm unit is connected with reliability information buffer unit, calculates longitudinal reliability according to the data that reliability information buffer unit provides by reliability algorithm, and longitudinal reliability is sent to the longitudinal evaluation module of reliability, and reliability algorithm is

${\mathrm{REL}}_x=\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\max (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\min (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2};$ Wherein, REL _xfor the longitudinal reliability of an xth dimension be made up of transmission delay information and packet loss information;

The longitudinal evaluation module of reliability in reliability evaluation device is connected with Calculation of Reliability module, for more longitudinal reliability;

Reliability evaluation Index module in reliability evaluation device is used for providing evaluation index, comprises transmission delay higher limit and packet loss higher limit;

Reliability lateral appraisement module in reliability evaluation device is connected with reliability evaluation Index module and reliability information processing module, comprises transmission delay reliability calculating unit, packet loss reliability calculating unit and buffer unit; Transmission delay reliability calculating unit is used for comparing transmission delay higher limit and transmission delay information, if transmission delay higher limit is greater than transmission delay information, then transmission delay reliability is 1, if transmission delay higher limit is less than or equal to transmission delay information, then transmission delay reliability is 0; Packet loss reliability calculating unit is used for comparing packet loss higher limit and packet loss information, if packet loss higher limit is greater than packet loss information, then packet loss reliability is 1, if packet loss higher limit is less than or equal to packet loss information, then packet loss reliability is 0; Buffer unit is used for the horizontal reliability of Line for Passenger Transportation signal system secure data net described in buffer memory, and horizontal reliability transmission delay reliability and packet loss reliability sum represent;

Reliability evaluation module in reliability evaluation device is connected with reliability lateral appraisement module and the longitudinal evaluation module of reliability, comprises comparing unit and overall merit unit; Comparing unit is used for more horizontal reliability and longitudinal reliability; Overall merit unit is connected with comparing unit, according to the result compared, obtains the reliability of Line for Passenger Transportation signal system secure data net; Horizontal reliability is higher, and the reliability of Line for Passenger Transportation signal system secure data net is higher, and when horizontal reliability is identical, longitudinal reliability is larger, then the reliability of Line for Passenger Transportation signal system secure data net is higher.

Be illustrated as in the above description " ~ module ", " ~ unit ", part both can be " ~ circuit ", " ~ equipment ", " ~ function ", can also be " ~ step ", " ~ stage ", " ~ process ".In addition, the part being illustrated as " ~ device " both can be " ~ circuit ", " ~ equipment ", " ~ unit ", " ~ function ", can also be " ~ step ", " ~ stage ", " ~ process ".Can by means of only software or by means of only hardware or the combinations by software restraint such as element, equipment, substrate, wirings, namely program makes computer etc. play function as " ~ the portion " of foregoing description.Or, make computer etc. perform stage, the method for foregoing description.

Invention effect main manifestations of the present invention: a kind of analytical method using quantification of targets as unification in the reliability of Line for Passenger Transportation signal system secure data net, standard can be provided, as reference that is national and industry standard, The invention also achieves a kind of index Analysis and measurement contributing to the secure data net stability in Line for Passenger Transportation signal system field in addition.

Claims (1)

1. a fail-safe analysis device for Line for Passenger Transportation signal system secure data net, is characterized in that:

Comprise: fault injection device, service traffics analogue means, Topology g eneration device, reliability evaluation device;

Wherein said fault injection device is connected with described Topology g eneration device, and described service traffics analogue means is connected with described Topology g eneration device, and described Topology g eneration device is connected with described reliability evaluation device;

Described fault injection device, for identifying the out of order network node in described Line for Passenger Transportation signal system secure data net, comprises network matrix generation module, node factor of influence computing module, link factor of influence computing module, fault location module, Fault Identification module;

Out of order network node in the described Line for Passenger Transportation signal system secure data net that described Topology g eneration device sends over according to described fault injection device reads the network node in described Line for Passenger Transportation signal system secure data net and link, and described Topology g eneration device comprises three-tier switch information generating module, Layer 2 switch information generating module, link information generation module and network simulation module;

Described service traffics analogue means is made up of data flow module, data flow synthesis module and multiple data flow generation module, gives described Topology g eneration device for generation of data flow;

Described reliability evaluation device is made up of reliability information acquisition module, reliability information processing module, reliability effect factor computing module, Calculation of Reliability module, reliability evaluation Index module, reliability lateral appraisement module, the longitudinal evaluation module of reliability and reliability evaluation module, carries out fail-safe analysis to described Line for Passenger Transportation signal system secure data net;

Described network matrix generation module carries out storing and calculating for all network nodes in described Line for Passenger Transportation signal system secure data net and the automatic generator matrix of link;

Described node factor of influence computing module and described link factor of influence computing module read the described matrix that described network matrix generation module generates automatically, and the node factor of influence of all network nodes calculated respectively in described Line for Passenger Transportation signal system secure data net and the link factor of influence of link;

Described node factor of influence is the shortest path number of the network node in described Line for Passenger Transportation signal system secure data net; Described link factor of influence is L _ij=Load _ij/ ∑ _{i ≠ j}l (Path _ij), wherein Path _ijrepresent the link between i-th network node and a jth network node in described Line for Passenger Transportation signal system secure data net, wherein said l (Path _ij) represent through described Path _ijshortest path number, described Load _ijrepresent through described Path _ijuninterrupted, wherein said i, j are natural number;

Described fault location module is according to the result of calculation of the result of calculation of described node factor of influence computing module and described link factor of influence computing module, be normalized and judge, when the value after the normalized obtained is greater than 0.3, the network node of described Line for Passenger Transportation signal system secure data net is identified as the out of order network node in described Line for Passenger Transportation signal system secure data net; The link of the out of order network node in described Line for Passenger Transportation signal system secure data net is out of order link;

The network node of described Line for Passenger Transportation signal system secure data net has two kinds of operating state: normal operating conditions ON and malfunction OFF, and described Fault Identification module becomes described malfunction OFF the operating state of the out of order network node in described Line for Passenger Transportation signal system secure data net; Finally send the device id of the out of order network node in described Line for Passenger Transportation signal system secure data net and described malfunction OFF to described Topology g eneration reading device again;

The information of described three-tier switch information generating module in described Topology g eneration device to the three-tier switch in described Line for Passenger Transportation signal system secure data net reads and generates corresponding information; Wherein said three-tier switch information generating module comprises three-tier switch graphics generation unit, three-tier switch data link layer protocol reading unit, three-tier switch network layer protocol reading unit and three-tier switch NMP reading unit;

Described three-tier switch graphics generation unit, for reading the topology information of three-tier switch in Line for Passenger Transportation signal system secure data net, generates the state scene graph of three-tier switch;

Described three-tier switch data link layer protocol reading unit, on the state scene graph basis of the described three-tier switch generated at described three-tier switch graphics generation unit, read the link layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net;

Described three-tier switch network layer protocol reading unit, on the state scene graph basis of the described three-tier switch generated at described three-tier switch graphics generation unit, reads the network layer protocol of three-tier switch in Line for Passenger Transportation signal system secure data net;

Described three-tier switch NMP reading unit, on the state scene graph basis of the described three-tier switch generated at described three-tier switch graphics generation unit, read the NMP of three-tier switch in Line for Passenger Transportation signal system secure data net;

Described Layer 2 switch information generating module in described Topology g eneration device reads the layer 2-switched information in described Line for Passenger Transportation signal system secure data net and generates corresponding information; Wherein said Layer 2 switch information generating module comprises Layer 2 switch graphics generation unit, Layer 2 switch data link layer protocol reading unit and Layer 2 switch NMP reading unit;

Described Layer 2 switch graphics generation unit, for reading layer 2-switched topology information in Line for Passenger Transportation signal system secure data net, generates layer 2-switched state scene graph;

Described Layer 2 switch data link layer protocol reading unit, on the described layer 2-switched state scene graph basis that described Layer 2 switch graphics generation unit generates, read layer 2-switched link layer protocol in Line for Passenger Transportation signal system secure data net;

Described Layer 2 switch NMP reading unit, on the described layer 2-switched state scene graph basis that described Layer 2 switch graphics generation unit generates, read layer 2-switched NMP in Line for Passenger Transportation signal system secure data net;

Described link information generation module, for generating the information of the link in described Line for Passenger Transportation signal system secure data net, comprises link graphics generation unit, Linktype selected cell, link data packet format setting unit and link bandwidth setting unit;

Described link graphics generation unit, for reading the topology information of Line for Passenger Transportation signal system secure data net link, generates the state scene graph of link;

Described Linktype selected cell, for selecting the type parameter of the link in described Line for Passenger Transportation signal system secure data net;

Described link data packet format setting unit, for reading and storing the data packet format transmitted of the link in described Line for Passenger Transportation signal system secure data net;

Described link bandwidth setting unit, reads and stores the bandwidth that the link in described Line for Passenger Transportation signal system secure data net provides;

Described network simulation module includes whole net topology generation unit, service traffics resolution unit, Fault analytical unit, data statistics unit;

Described whole net topology generation unit, described three-tier switch information generating module, described Layer 2 switch information generating module and described link information generation module are combined, generate the network topology structure in whole described Line for Passenger Transportation signal system secure data net, and according to the state of described service traffics resolution unit and described Fault analytical unit, data are sent to described data statistics unit;

Described service traffics resolution unit resolves the source address of the described data flow that described service traffics analogue means sends over and destination address and timestamp respectively, and in whole net topology generation unit configuration service flow; The timestamp of the described data flow parsed is for calculating the time delay in the network topology structure in described Line for Passenger Transportation signal system secure data net between any two nodes;

Described Fault analytical unit receives the device id of the out of order network node in the described Line for Passenger Transportation signal system secure data net sent in described Fault Identification module and described malfunction OFF; And select corresponding node and link according in network topology structure in the described Line for Passenger Transportation signal system secure data net generated of the device id of the out of order network node in described Line for Passenger Transportation signal system secure data net, the operating state of the out of order network node then arranged in described Line for Passenger Transportation signal system secure data net according to described Fault Identification module is set to described malfunction OFF;

Described data statistics unit is used for the statistics of original time delay and original packet loss, and exports delay state figure and packet loss state diagram with display;

Described multiple data flow generation modules in described service traffics analogue means are used for producing described data flow; Data flow described in every bar comprises source node, destination node, the size of packet, the interval of giving out a contract for a project of packet;

Described source node comprises train control center, temporary speed limitation server, radio block center, station interlocking; Described destination node comprises described train control center, described station interlocking, described radio block center, described temporary speed limitation server;

There are eight kinds of situations in the connection of described source node and described destination node: between described train control center and described train control center, between described train control center and described station interlocking, between described temporary speed limitation server and described radio block center, between described temporary speed limitation server and described train control center, between described temporary speed limitation server and described temporary speed limitation server, between described radio block center and described station interlocking, between described radio block center and described radio block center, between described station interlocking and described station interlocking,

For in described eight kinds of situations, the size of the described packet in the described data flow that often kind of situation is corresponding is by auto-correlation function determine; Wherein k is positive integer, relevant with the time interval, and H is parameter set arbitrarily according to actual conditions in described eight kinds of situations in described data flow, and span is 0.5 ~ 1, thus tries to achieve C (k);

In described eight kinds of situations, the interval of giving out a contract for a project of the described packet in the described data flow that often kind of situation is corresponding is by the function about the time determine; Wherein d is positive integer, and be the parameter in described data flow set by described eight kinds of situation practical operation situation, span is 10 ~ 100;

Described data flow synthesis module, described data flow is carried out superposition and is obtained superposition of data stream by the mode adopting time domain to be added;

Described data flow module, exports described superposition of data stream to described Topology g eneration device;

Described reliability information acquisition module comprises collection statistic unit, transmission delay information cache unit, packet loss information cache unit, and is connected with described data statistics unit;

The described original time delay that described reliability information acquisition module provides described data statistics unit and described original packet loss gather, and collection result is processed stored in transmission delay information cache unit and packet loss information cache unit respectively, the data result of process sends to reliability information processing module;

Described reliability information processing module is connected with described reliability information acquisition module, average sampling is carried out to the described data result that described reliability information acquisition module exports, obtain sampling transmission delay data and sampling packet loss data by described average sampling, and form matrix A _{(m × 2)}, wherein m represents the dimension of described sampling transmission delay data or described sampling packet loss data;

Described reliability effect factor computing module is connected with described reliability information processing module, for carrying out factor of influence calculating according to reliability effect because of subformula to sampling transmission delay data and described sampling packet loss data, obtain transmission delays affect Summing Factor packet loss factor of influence, judge described sampling transmission delay data and the described sampling packet loss data influence degree for the reliability of described Line for Passenger Transportation signal system secure data net; Described reliability effect comprises data prediction formula and factor of influence computing formula because of subformula, and wherein data prediction formula is wherein x is described matrix A _{(m × 2)}an xth dimension, the span of x is 1 ~ m, and wherein m is natural number; Y value 1 and 2, as y=1, a _xyrepresent described sampling transmission delay data, b _xyfor the value after data prediction, be transmission delay information; As y=2, a _xyrepresent described sampling packet loss data; b _xyfor the value after data prediction, be packet loss information; Described factor of influence computing formula is $e_y=-\underset{x=1}{\overset{m}{\mathrm{\Σ}}}(b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}})\·\log (b_{\mathrm{xy}}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{b}_{\mathrm{xy}}),$ $W_y=(1/\frac{e_y}{\log \left(m\right)})/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}(1/\frac{e_y}{\log \left(m\right)}),$ Wherein: as y=1, W _yand e _ybe respectively the entropy of transmission delay information described in described transmission delays affect Summing Factor; As y=2, W _yand e _ybe respectively the entropy of described packet loss factor of influence and described packet loss information;

Described Calculation of Reliability module is connected with described reliability effect factor computing module and described reliability information processing module, comprises reliability information buffer unit and reliability algorithm unit;

Described reliability information buffer unit is used for transmission delay information, described packet loss information described in buffer memory, packet loss factor of influence described in described transmission delays affect Summing Factor;

Described reliability algorithm unit is connected with described reliability information buffer unit, longitudinal reliability is calculated by reliability algorithm according to the data that described reliability information buffer unit provides, and described longitudinal reliability is sent the longitudinal evaluation module of reliability, described reliability algorithm is

${\mathrm{REL}}_x=\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\max (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2}/\underset{y=1}{\overset{2}{\mathrm{\Σ}}}{W}_y\sqrt{{(b_{\mathrm{xy}}-\min (b_{1y}{b}_{2y}...b_{\mathrm{my}}))}^2};$ Wherein, REL _xrepresent longitudinal reliability of the xth dimension formed through described transmission delay information and described packet loss information;

In described Line for Passenger Transportation signal system secure data network simulation collection and evaluator, the longitudinal evaluation module of reliability is connected with Calculation of Reliability module, for more longitudinal reliability;

Described reliability evaluation Index module is used for providing evaluation index, comprises transmission delay higher limit and packet loss higher limit;

Described reliability lateral appraisement module is connected with described reliability evaluation Index module and described reliability information processing module, is made up of transmission delay reliability calculating unit, the packet loss reliability calculating unit deposit receipt unit that eases up;

Described transmission delay reliability calculating unit is used for more described transmission delay higher limit and described transmission delay information, if described transmission delay higher limit is greater than described transmission delay information, then transmission delay reliability is 1, if described transmission delay higher limit is less than or equal to described transmission delay information, then described transmission delay reliability is 0; Packet loss reliability calculating unit is used for more described packet loss higher limit and described packet loss information, if described packet loss higher limit is greater than described packet loss information, then described packet loss reliability is 1, if described packet loss higher limit is less than or equal to described packet loss information, then described packet loss reliability is 0;

Described buffer unit is used for the horizontal reliability of Line for Passenger Transportation signal system secure data net described in buffer memory; Described horizontal reliability described transmission delay reliability and described packet loss reliability sum represent;

Described reliability evaluation module is connected with described reliability lateral appraisement module and the longitudinal evaluation module of described reliability, comprises comparing unit and overall merit unit;

Described comparing unit is used for more described horizontal reliability and described longitudinal reliability; Described overall merit unit is connected with described comparing unit, according to the result compared, obtains the reliability of Line for Passenger Transportation signal system secure data net; Described horizontal reliability is higher, and the reliability of Line for Passenger Transportation signal system secure data net is higher, and when described horizontal reliability is identical, described longitudinal reliability is larger, then the reliability of Line for Passenger Transportation signal system secure data net is higher.