CN102315997A - Multifunctional vehicle bus network communication method and system - Google Patents
Multifunctional vehicle bus network communication method and system Download PDFInfo
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- CN102315997A CN102315997A CN201110245885A CN201110245885A CN102315997A CN 102315997 A CN102315997 A CN 102315997A CN 201110245885 A CN201110245885 A CN 201110245885A CN 201110245885 A CN201110245885 A CN 201110245885A CN 102315997 A CN102315997 A CN 102315997A
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Abstract
The invention discloses a multifunctional vehicle bus network communication method and a system. The method comprises the steps of: aiming at port data and the eigenperiod of the port data, calculating the current network load of each basic period contained by the eigenperiod; and selecting to send the maximum port data with the maximum data quantity in the port data in the basic period of the lowest current network load according to the calculation results. Through the method and the system, provided by the invention, in the multifunctional vehicle bus network communication, the data packet loss caused by the concentrate sending of the port data in one basic period is avoided through calculating and selecting the basic period with small network load to send the port data.
Description
Technical field
The present invention relates to the train network communication technical field, particularly relate to a kind of method and system of MVB network service.
Background technology
Along with development of internet technology, the use of network is also changing rail transportation system more and more.On various trains such as municipal rail train, EMUs, bullet train, subway, pendulum train, the transmission of Train Control order and state information, the diagnostic message of each parts of train and the transmitting and displaying of train information etc. all are based upon on the TCN basis.TCN (Train Communication Network, TCN) by MVB (Multifunction Vehicle Bus, MVB) and wired train bus (Wire Train Bus WTB) constitutes.Wherein, MVB is the interconnected standard communication interface of various mobile units in the vehicle.
The process data of transmitting on the train network generally includes the state information on the train, like information such as the electric current of the speed of train operation, motor, the current running statuses of train.The data that comprise these information are periodically sent through MVB.MVB is as the serial data communications busses between the interconnect equipment in the car, and its bus bandwidth is very limited.The transmission of a process data is determined by the application of sending data through port in the train; But there is not the load condition of method acquisition MVB network effectively between using; This just possibly cause a plurality of data centralizations in a basic cycle, to be sent; Make that the network load in this basic cycle is excessive, cause the data packet loss.
Summary of the invention
In view of this; The object of the present invention is to provide a kind of method, system of MVB network service; Make in MVB network service; Through calculating and selecting the little basic cycle originating port data of network load, avoided concentrating in the basic cycle and sent at port data, and the data-bag lost that causes.
For realizing above-mentioned purpose, the invention provides following scheme:
A kind of method of MVB network service comprises:
To port data and eigenperiod thereof, calculate the current network load of each basic cycle that comprises said eigenperiod;
According to said result of calculation, be chosen in the current network load and send the maximum port data of data volume in the said port data in the minimum basic cycle.
Preferably, the current network of each basic cycle that said calculating is comprised said eigenperiod load is specially, to each basic cycle:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
Preferably, further comprise:
To the eigenperiod of port data,,, obtain the port data sequential list of said eigenperiod through the order that basic cycle middle port data are sent according to the port data of said transmission and the basic cycle of sending this port data thereof.
Preferably, further comprise:
To the eigenperiod of port data,,, obtain the decomposition tabulation of said eigenperiod through the order that basic cycle middle port data are sent according to the port data of said transmission and the basic cycle of sending this port data thereof.
Preferably, further comprise:
The port data of the said transmission of record and corresponding basic cycle of sending this port data thereof in the intermittent scanning table.
Preferably, further comprise:
Form retention cycle scan table with configuration file;
When MVB MVB netinit, main equipment loads the said configuration file that comprises intermittent scanning table information and obtains this intermittent scanning table information, so that main equipment is inquired about transmission according to the wheel of said intermittent scanning table information Control MVB middle port data.
A kind of system of MVB network service comprises:
The network load computing unit was used for to port data and eigenperiod thereof, calculated the current network load of each basic cycle that comprises said eigenperiod;
The port data transmitting element according to said result of calculation, is chosen in the current network load and sends the maximum port data of data volume in the said port data in the minimum basic cycle.
Preferably, said network load computing unit specifically is used for calculating said network load through following method, to each basic cycle:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
Preferably, further comprise:
Port data sequential list acquiring unit is used for the eigenperiod to port data, according to the port data of said transmission and the basic cycle of sending this port data thereof, through the order of basic cycle, obtains the port data sequential list of said eigenperiod.
Preferably, further comprise:
Decompose the tabulation acquiring unit, be used for eigenperiod,,, obtain the decomposition tabulation of said eigenperiod through the order of basic cycle according to the port data of said transmission and the basic cycle of sending this port data thereof to port data.
Preferably, further comprise:
Intermittent scanning table record unit is used for port data and corresponding basic cycle of sending this port data thereof in the said transmission of intermittent scanning table record.
Preferably, further comprise:
The intermittent scanning table is preserved the unit, is used for said intermittent scanning table is preserved with the form of configuration file;
Intermittent scanning table loading unit; Be used for when MVB MVB netinit; Main equipment loads the said configuration file that comprises intermittent scanning table information, so that main equipment is inquired about transmission according to the wheel of said intermittent scanning table information Control MVB middle port data.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
Because port data and the eigenperiod that is had are determined by using in advance, the port data that therefore under a circular list, is comprised is confirmed.The current network load of each basic cycle that is comprised in cycle through calculated characteristics is chosen in network load and sends the big port data of data volume in the low basic cycle.Make in MVB MVB network service through this method; Network load reaches more optimization effect; Avoided most possibly concentrating in the basic cycle and sent at port data; Cause the excessive and data-bag lost that causes of network load, thereby under band-limited situation, effectively utilize bandwidth to improve the reliability of process data.
In addition; The port data that obtains through said method and send the corresponding relation of this port data basic cycle; Can further obtain the intermittent scanning table, and with the form retention cycle scan table of configuration file, when the MVB netinit; Main equipment loads the configuration file that comprises intermittent scanning table information and obtains this intermittent scanning table information, through the transmission of control port data more quickly and easily of this method main equipment.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow sketch map of the embodiment of the invention;
Fig. 2 is that the network of MVB network service connects sketch map;
Fig. 3 is that the system of the embodiment of the invention connects sketch map.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills obtained belongs to the scope that the present invention protects.
(Multifunction Vehicle Bus, MVB) in the bus-structured control system, the data that are transmitted are divided into process data (Process Data) and aperiodicity data at MVB.Wherein, process data comprises the state information on the train, like information such as the electric current of the speed of train operation, motor, the current running statuses of train.Because process data is generally some important train status information, so the stronger timeliness of the requirement of process data, the time of its transmission must be confirmed bounded, for guarantee to confirm, process of transmitting data in time, process data is periodically sent.
For guaranteeing deterministic medium access, in the MVB bus structures, adopt the master-slave mode of one-to-many between the equipment, be divided into main equipment and slave unit.Have the equipment of bus manager ability, be called main equipment, other equipment are slave unit.The visit of main equipment control medium, under any circumstance, can the transmission course data by which slave unit of main equipment decision of working.Main equipment can be divided into the regular time sheet with the time of its control bus, and this timeslice is called the basic cycle.
Dispose an intermittent scanning table in each main equipment, the intermittent scanning table is to determine that by using main equipment sends the frame of certain process data, i.e. prime frame according to this intermittent scanning table with the form polling request equipment of broadcasting.The source device of this process data is answered one through the form of broadcasting and is comprised by the frame of request process data, promptly from frame.In a basic cycle, main equipment and slave unit carry out polling request and data successively answers, and all process datas are sent and accomplished in this basic cycle.
Link layer at the train network communication equipment provides the port of some to be used for process data communication.Port is a kind of shared internal storage structure, can be employed simultaneously and access to netwoks.As shown in Figure 2, this figure is that the network of MVB network service connects sketch map;
Each port is identified by port address, and port address sign is represented by four hexadecimal numbers, and the first bit function sign indicating number (F_CODE) indicates the length of data set on the port, remaining three, represents port address.The value of F_CODE is as shown in table 1 with the length of corresponding port data.Has only data set, i.e. a port data on each port.
Table 1
| F_CODE | The length of corresponding port data (position) |
| 0 | 16 |
| 1 | 32 |
| 2 | 64 |
| 3 | 128 |
| 4 | 256 |
Example port-mark 0010h representes that port address is 10h, and the port data length on it is 16.
A port data can only produce data by an equipment.This equipment is called the source device of this port data.The equipment that receives this port data can have one or more, and the equipment of receiving port data is called the place equipment of this port data.Which port equipment uses, the size of port data, and the source device of port, place equipment is all by using decision.
The message of MVB is made up of two kinds of frames, the prime frame that promptly main equipment sends in the bus, and for slave unit for respond that this prime frame sees off from frame.
The size of prime frame is fixing 33, comprises 9 delimiters, 16 bit data positions and 8 Frame Check Sequences.Wherein high 4 of data bit is function code F_CODE, and back 12 is source port address or other parameters.
Comprise 9 delimiters from frame, 16,32,64,128 or 256 bit data, and 8 bit check sequences after per 64 bit data are less than 64 data, as also comprising 8 bit check sequences after 16,32 bit data.Therefore according to the different values of F_CODE in the prime frame, have 33,49 from frame, 81,153 or 297 5 kinds of forms.
The F_CODE different according to prime frame, prime frame is respectively as shown in table 2 from frame and corresponding message size:
Table 2
| F_CODE | Prime frame (position) | From frame (position) | Message (position) |
| 0 | 1+8+16+8＝33 | 1+8+16+8＝33 | 66 |
| 1 | 1+8+16+8＝33 | 1+8+32+8＝49 | 82 |
| 2 | 1+8+16+8＝33 | 1+8+64+8＝81 | 114 |
| 3 | 1+8+16+8＝33 | 1+8+64+8+64+8＝153 | 186 |
| 4 | 1+8+16+8＝33 | 1+8+64+8+64+8+64+8+64+8＝297 | 330 |
The periodic data that circulation will have the same characteristic features cycle is weaved into one group, and its group name uses represent as the multiple of basic cycle its eigenperiod.
According to the timeliness requirement of process data, the cycle of master polls slave unit procurement process data is also different, and the time interval that promptly shows as the master polls port data is different.The time interval of master polls port data is called eigenperiod, representes with T_ip.Be a m power basic cycle of 2 eigenperiod, and the m value is 0-10, totally 11 kinds of eigenperiods, so the relation of eigenperiod and basic cycle such as following formula:
T_ip(i)＝T_bp×2
m，n＝(1...10)
The eigenperiod of each port data is by using decision, and main equipment is each port data of poll in its eigenperiod T_ip.In all of the port data, the periodic quantity with maximum eigenperiod is called the grand cycle.
According to the MVB standard, the port data with same characteristic features cycle is placed into same circulation, so in the intermittent scanning table that main equipment had 11 circulations is arranged at most.Basic cycle is numbered BP (j), j=(0..macro-1) wherein, first cycle of BP (0)=grand circulation for example, last cycle of BP (macro-1)=grand circulation.
T_ip eigenperiod (i) through port data had classifies to port data, promptly is expressed as the different port data under a certain circulation.For example: the port data under the Cycle_8 has 0010h, 0020h, 1030h, 1040h, i.e. Cycle_8, and the representation feature cycle is T_bp * 2
3, i.e. the circulation of 8T_bp comprises port data 0010h, 0020h, 1030h, 1040h.Main equipment will be in 8T_bp, and the form poll with broadcasting comprises port data 0010h successively, 0020h, and 1030h after the slave unit of 1040h, slave unit receive the poll of main equipment, will send corresponding port data with the form of broadcasting.
Because the port data that comprised of circulation has identical eigenperiod, port data successively by poll one time, but comprises 2 this eigenperiod in this eigenperiod
mThe individual basic cycle, thus each port data specifically this 2
mBe uncertain by poll in which in the individual basic cycle basic cycle.For confirming port data by the basic cycle of poll, a circulation further is broken down into a plurality of subcycles, and each subcycle has confirmed that port is by in the basic cycle of poll.A circulation Cycle_n has the n sub-loop, and for example Cycle_8 has 8 sub-loop.One sub-loop is by its index definition, and example Cycle_4.0 is first subcycle of Cycle_4, and Cycle_4.1 is second sub-loop of Cycle_4.In each subcycle, can be somebody's turn to do the port data under the circulation by poll, also can not carry out poll.In addition, during the master polls port data, can be in a basic cycle one or more port datas of poll successively.For example:
Port data in last example, 0010h, 0020h, 1030h, 1040h can be at poll in the norator in 8 sub-loop of the Cycle_8 circulation.As follows:
0010h is poll in Cycle_8.0
0020h is poll in Cycle_8.2
1030h is poll in Cycle_8.4
1040h is poll in Cycle_8.6
Perhaps,
0010h 0020h is poll in Cycle_8.0 successively
1030h is poll in Cycle_8.4
1040h is poll in Cycle_8.6
, further can be defined and decompose in the tabulation by the concrete subcycle of poll according to port data.Decompose contain in the tabulation each subcycle be in each basic cycle by the number of the port data of poll, and then confirm the message number that sent in each basic cycle.Decomposing the decomposition that have each eigenperiod in the tabulation tabulates with representing its eigenperiod.For example Split_2 representes the decomposition tabulation of Cycle_2.
In last example, the decomposition of subcycle poll is tabulated as follows:
Split_8
BP (0) 01h:1 of Cycle 8 0010h poll in Cycle_8.0
BP(1)00h：2?of?Cycle?8
BP (2) 01h:3 of Cycle 8 0020h poll in Cycle_8.2
BP(3)00h：4?of?Cycle?8
BP (4) 01h:5 of Cycle 8 1030h poll in Cycle_8.4
BP(5)00h：6?of?Cycle?8
BP (6) 01h:7 of Cycle 8 1040h poll in Cycle_8.6
BP(7)00h：8?of?Cycle?8
Perhaps
Split_8
BP (0) 02h:1 of Cycle 8 0010h 0020h poll in Cycle_8.0
BP(1)00h：2?of?Cycle?8
BP(2)00h：3?of?Cycle?8
BP(3)00h：4?of?Cycle?8
BP (4) 01h:5 of Cycle 8 1030h poll in Cycle_8.4
BP(5)00h：6?of?Cycle?8
BP (6) 01h:7 of Cycle 8 1040h poll in Cycle_8.6
BP(7)00h：8?of?Cycle?8
Because be determined by using in advance the eigenperiod that each port data had, the port data that therefore under a circular list, is comprised is confirmed.The current network load of each basic cycle that is comprised in cycle through calculated characteristics, the basic cycle of selecting port data to send: be chosen in network load and send the big port data of data volume in the low basic cycle; Be chosen in network load and send the little port data of data volume in the high basic cycle.Make that through this method network load reaches more optimization effect in MVB communication, avoided most possibly concentrating in the basic cycle and sent, cause the excessive and data-bag lost that causes of network load at port data.
Following reference is shown in Figure 1, specifically introduces MVB communication means provided by the invention through embodiment:
S101 calculates the current network load of each basic cycle that comprises said eigenperiod to port data and eigenperiod thereof.
Confirm that by using main equipment is each port data of poll in its eigenperiod the eigenperiod of each port data.Port data with same characteristic features cycle is placed into same circulation.Be convenient and describe, in the present embodiment, suppose to exist four circulation Cycle_1, Cycle_2, Cycle_4, Cycle_8, the port data difference that each circulation is comprised as follows:
Cycle_1?0001h
Cycle_2?1002h?2003h
Cycle_4?1004h?2005h
Cycle_8?4006h
Under the requirement of satisfying eigenperiod, the down pairing decomposition tabulation of each circulation can be adjusted, and therefore decomposing tabulation with 3 kinds is example.
First kind is decomposed tabulation:
Split_1
BP (0) 01:1 of Cycle 10001h poll in Cycle_1.0
Split_2
BP (0) 01:1 of Cycle 2 1002h poll in Cycle_2.0
BP (1) 01:1 of Cycle 2 2003h poll in Cycle_2.1
Split_4
BP (0) 01:1 of Cycle 4 1004h poll in Cycle_4.0
BP(1)00
BP (2) 01:1 of Cycle 4 2005h poll in Cycle_4.2
BP(3)00：
Split_8
BP(0)00
BP (1) 01:1 of Cycle 8 4006h poll in Cycle_8.1
BP(2)00
BP(3)00
BP(4)00
BP(5)01
BP(6)01
BP(7)00
Cycle_1 does not have division, and port data 0001h occurred in each cycle.
Cycle_2 is divided into 2 sub-loop, according to decomposing tabulation Split_2, port data 1002h can be in a grand cycle the 0th; The 2nd, the 4th, occur in the 6th basic cycle; Port data 2003h can be in a grand cycle the 1st; The 3rd, the 5th, occur in the 7th basic cycle.
Cycle_4 is divided into 4 sub-loop, according to decomposing tabulation Split_4, port data 1004h can be in a grand cycle the 0th, occur in the 4th basic cycle, port data 2005h can be in a grand cycle the 2nd, occur in the 6th basic cycle.
Cycle_8 is divided into 8 sub-loop, and according to decomposing tabulation Split_8, port data 4006h can occur in the 1st basic cycle in a grand cycle.
Obtain table 3 to this decomposition tabulation and characteristic week thereof:
Table 3
Therefore, BP in (0) basic cycle with poll 0001h, 1002h, 1004h.
Second kind is decomposed in the tabulation, changes the basic cycle of transmit port data among the Split_2:
Split_2
BP (0) 01:1 of Cycle 2 2003h poll in Cycle_2.0
BP (1) 01:1 of Cycle 2 1002h poll in Cycle_2.1
At this moment, Cycle_1 appoints right nothing to divide, and port data 0001h occurred in each cycle.
Cycle_2 is divided into 2 sub-loop, according to decomposing tabulation Split_2, port data 2003h can be in a grand cycle the 0th; The 2nd, the 4th, occur in the 6th basic cycle; Port data 1002h can be in a grand cycle the 1st; The 3rd, the 5th, occur in the 7th basic cycle.
Cycle_4 is divided into 4 sub-loop, according to decomposing tabulation Split_4, port data 1004h can be in a grand cycle the 0th, occur in the 4th basic cycle, port data 2005h can be in a grand cycle the 2nd, occur in the 6th basic cycle.
Cycle_8 is divided into 8 sub-loop, and according to decomposing tabulation Split_8, port data 4006h can occur in the 1st basic cycle in a grand cycle.
Obtain table 4 to this decomposition tabulation and characteristic week thereof:
Table 4
At this moment, BP in (0) basic cycle with poll 0001h, 2003h, 1004h.
The third decomposes in the tabulation, changes the basic cycle of transmit port data among the Split_8:
Split_8
BP (0) 01:1 of Cycle 8 4006h poll in Cycle_8.1
BP(1)00
BP(2)00
BP(3)00
BP(4)00
BP(5)01
BP(6)01
BP(7)00
At this moment, Cycle_1 appoints right nothing to divide, and port data 0001h occurred in each cycle.
Cycle_2 is divided into 2 sub-loop, according to decomposing tabulation Split_2, port data 1002h can be in a grand cycle the 0th; The 2nd, the 4th, occur in the 6th basic cycle; Port data 2003h can be in a grand cycle the 1st; The 3rd, the 5th, occur in the 7th basic cycle.
Cycle_4 is divided into 4 sub-loop, according to decomposing tabulation Split_4, port data 1004h can be in a grand cycle the 0th, occur in the 4th basic cycle, port data 2005h can be in a grand cycle the 2nd, occur in the 6th basic cycle.
Cycle_8 is divided into 8 sub-loop, and according to decomposing tabulation Split_8, port data 4006h can occur in the 1st basic cycle in a grand cycle.
Obtain table 5 to this decomposition tabulation and characteristic week thereof:
Table 5
At this moment, BP in (0) basic cycle with poll 0001h, 1003h, 1004h, 4006h.
According to the port data in each basic cycle, calculate the network load of this basic cycle, concrete Calculation Method can or be sent data volume and calculate according to the data transmission delay.
A kind of method according to data transmission delay computing network load is following:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
In the present embodiment, concrete computing formula is following:
Network load (%)=(C0*66+C1*82+C2*114+C3*186+C4*330)/N+ (C0+C1+C2+C3+C4) * T_reply_max}/T_bp*100
Wherein,
C0 representes that F_CODE is 0 port number;
C1 representes that F_CODE is 1 port number;
C2 representes that F_CODE is 2 port number;
C3 representes that F_CODE is 3 port number;
C4 representes that F_CODE is 4 port number;
66,82,114,186,330 like aforementioned introduction, is the message length of various port data, comprises the poll prime frame that main equipment sends, and the port data that sends of slave unit;
(C0*66+C1*82+C2*114+C3*186+C4*330) represent the message size that sends in this basic cycle;
N represents the transmission rate of MVB bus, is fixing 1.5Mbps;
Therefore, (C0*66+C1*82+C2*114+C3*186+C4*330)/N representes message transmitting time delay;
T_re ply_max representes that the prime frame transmission finishes to the time-delay that responds the maximum possible of this prime frame from frame.The us of unit;
T_bp representes the basic cycle.
Common T_re ply_max, T_bp determine by using.
According to above-mentioned formula, suppose T_reply_max=42.7us, during T_bp=1000us, calculate the network load of BP (0) under three kinds of situation, obtain 28.1%, 30.3% and 54.38% respectively.
S102 is chosen in the current network load and sends the maximum port data of data volume in the said port data in the minimum basic cycle according to result of calculation.
According to result of calculation among the S101; Calculate the current network load of the basic cycle BP (0) that comprises eigenperiod; Can find out; BP in (0) basic cycle with poll 0001h, 1002h, 1004h, network load is minimum, therefore can be chosen in BP sends above-mentioned three port datas in (0) basic cycle.
Obtaining port data that sends and the basic cycle of sending this port data thereof,, obtain the port data sequential list of said eigenperiod through the order of basic cycle.In the present embodiment, the port data sequence list of acquisition is:
Cycle_1?0001h
Cycle_2?1002h?2003h
Cycle_4?1004h?2005h
Cycle_8?4006h
It should be noted that if the port data sequence list that then possibly exist is not through calculating and the selection of S101 and S102:
Cycle_1?0001h
Cycle_2?2003h?1002h
Cycle_4?1004h?2005h
Cycle_8?4006h
Be that poll 1002h is different with the order of 2003h among the Cycle_2, the result caused at BP in (0) basic cycle, and network load is big (30.3%) more.
In addition, to the eigenperiod of port data, according to port data that sends and the basic cycle of sending this port data thereof; Order through the basic cycle; Can also obtain the decomposition tabulation of eigenperiod, in the present embodiment, first kind is decomposed tabulation and is network load decomposition tabulation hour.
In addition; Through the port data and the corresponding basic cycle of sending this port data thereof of record transmission in the intermittent scanning table; Can obtain network load intermittent scanning table hour, through form retention cycle scan table, when the MVB netinit with configuration file; Main equipment loads the configuration file that comprises intermittent scanning table information and obtains this intermittent scanning table information, and main equipment is the transmission of control port data more quickly and easily.
With reference to shown in Figure 3, introduce the system of the pairing a kind of MVB network service of the embodiment of the invention below, comprising:
Network load computing unit 301 was used for to port data and eigenperiod thereof, the current network of each basic cycle that the calculated characteristics cycle is comprised load.Be to use decision the eigenperiod that port data had, and therefore according to eigenperiod port data being classified, promptly confirms the port data that each circulation is comprised down.The current network load of each basic cycle that comprised this eigenperiod.
Port data transmitting element 302 according to said result of calculation, is chosen in the current network load and sends the maximum port data of data volume in the said port data in the minimum basic cycle.
Wherein, network load computing unit 301 according to the port data in each basic cycle, calculates the network load of this basic cycle, and concrete Calculation Method can or be sent data volume and calculate according to the data transmission delay.
A kind of method according to data transmission delay computing network load is following, to each basic cycle:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
Obtaining port data that sends and the basic cycle of sending this port data thereof,, obtain the port data sequential list of said eigenperiod through the order of basic cycle.Therefore; Native system further can also comprise: port data sequential list acquiring unit is used for the eigenperiod to port data, according to port data that sends and the basic cycle of sending this port data thereof; Through the order of basic cycle, obtain the port data sequential list of eigenperiod.
In addition; Through the port data and the corresponding basic cycle of sending this port data thereof of record transmission in the intermittent scanning table; Can obtain network load intermittent scanning table hour; Therefore, intermittent scanning table record unit be can also comprise, the port data and the corresponding basic cycle of sending this port data thereof of sending are used at intermittent scanning table record.
Through the form retention cycle scan table with configuration file, when the MVB netinit, main equipment loads the configuration file that comprises intermittent scanning table information and obtains this intermittent scanning table information, and main equipment is the transmission of control port data more quickly and easily.Therefore, further comprise: the unit is preserved in the cycle tabulation, is used for said intermittent scanning table is preserved with the form of configuration file; Cycle tabulation loading unit is used for when the MVB netinit, and main equipment loads the said configuration file that comprises intermittent scanning table information, so that main equipment is inquired about transmission according to the wheel of said intermittent scanning table information Control MVB middle port data.
More than to method, the system of a kind of MVB network service provided by the present invention; Carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part all can change on embodiment and range of application.In sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. the method for a MVB network service is characterized in that, comprising:
To port data and eigenperiod thereof, calculate the current network load of each basic cycle that comprises said eigenperiod;
According to said result of calculation, be chosen in the current network load and send the maximum port data of data volume in the said port data in the minimum basic cycle.
2. method according to claim 1 is characterized in that, the current network load of each basic cycle that said calculating is comprised said eigenperiod is specially, to each basic cycle:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
3. method according to claim 1 and 2 is characterized in that, further comprises:
To the eigenperiod of port data,,, obtain the port data sequential list of said eigenperiod through the order that basic cycle middle port data are sent according to the port data of said transmission and the basic cycle of sending this port data thereof.
4. method according to claim 1 and 2 is characterized in that, further comprises:
To the eigenperiod of port data,,, obtain the decomposition tabulation of said eigenperiod through the order that basic cycle middle port data are sent according to the port data of said transmission and the basic cycle of sending this port data thereof.
5. method according to claim 1 and 2 is characterized in that, further comprises:
The port data of the said transmission of record and corresponding basic cycle of sending this port data thereof in the intermittent scanning table.
6. method according to claim 5 is characterized in that, further comprises:
Form retention cycle scan table with configuration file;
When MVB MVB netinit, main equipment loads the said configuration file that comprises intermittent scanning table information and obtains this intermittent scanning table information, so that main equipment is inquired about transmission according to the wheel of said intermittent scanning table information Control MVB middle port data.
7. the system of a MVB network service is characterized in that, comprising:
The network load computing unit was used for to port data and eigenperiod thereof, calculated the current network load of each basic cycle that comprises said eigenperiod;
The port data transmitting element according to said result of calculation, is chosen in the current network load and sends the maximum port data of data volume in the said port data in the minimum basic cycle.
8. system according to claim 7 is characterized in that, said network load computing unit specifically is used for calculating said network load through following method, to each basic cycle:
Network load=(interior all of the port response delay of the propagation delay time+basic cycle of all of the port data in the basic cycle)/basic cycle.
9. according to claim 7 or 8 described systems, it is characterized in that, further comprise:
Port data sequential list acquiring unit is used for the eigenperiod to port data, according to the port data of said transmission and the basic cycle of sending this port data thereof, through the order of basic cycle, obtains the port data sequential list of said eigenperiod.
10. according to claim 7 or 8 described systems, it is characterized in that, further comprise:
Decompose the tabulation acquiring unit, be used for eigenperiod,,, obtain the decomposition tabulation of said eigenperiod through the order of basic cycle according to the port data of said transmission and the basic cycle of sending this port data thereof to port data.
11. according to claim 7 or 8 described systems, it is characterized in that, further comprise:
Intermittent scanning table record unit is used for port data and corresponding basic cycle of sending this port data thereof in the said transmission of intermittent scanning table record.
12. system according to claim 11 is characterized in that, further comprises:
The intermittent scanning table is preserved the unit, is used for said intermittent scanning table is preserved with the form of configuration file;
Intermittent scanning table loading unit; Be used for when MVB MVB netinit; Main equipment loads the said configuration file that comprises intermittent scanning table information, so that main equipment is inquired about transmission according to the wheel of said intermittent scanning table information Control MVB middle port data.
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