CN107634914A - A kind of frame method of flow control and device - Google Patents
A kind of frame method of flow control and device Download PDFInfo
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- CN107634914A CN107634914A CN201610570353.4A CN201610570353A CN107634914A CN 107634914 A CN107634914 A CN 107634914A CN 201610570353 A CN201610570353 A CN 201610570353A CN 107634914 A CN107634914 A CN 107634914A
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Abstract
The embodiment of the invention discloses a kind of frame method of flow control, methods described includes：When it is determined that website does not have data transfer, the timer count of the transmission in the website/receiving frame stream is checked, the overdue transmission/receiving frame stream of timer count is discharged；When it is determined that the website has data transfer, and when determining that docking frame stream available free in the website can use, establish data transmission link using the idle docking frame stream and data are transmitted.The embodiment of the present invention also discloses a kind of frame flow control device simultaneously.
Description
Technical field
The present invention relates to power line communication technology field, more particularly to a kind of frame method of flow control and device.
Background technology
Power line communication network typically uses tree topology.(respectively sent out in two websites of father and son's node relationships
See off a little and receiving station) between, there is continuous data flow.The data flow cache is preserved on transmission/receiving station, is managed
The data structure for managing the data flow cache is frame stream.The data constituted between the transmission frame stream and receiving frame stream in logic pass
Transmission link.Each data are remain simultaneously between website and other websites of direct neighbor in network topology structure to communicate.For
Realize the synchronization of transceiving data between website, it is necessary to coordinate transmission/receiving frame of two websites by some instructions and response
Data transfer between stream.
Existing HomePlug Green PHY standards define each hierarchical organization structure of power line communication protocols stack and work(
Can, wherein media access control layer (MAC, Media Access Control) realizes a set of frame flow-control mechanism, to coordinate
The transmission of two websites/receiving frame stream, it is allowed to keep synchronous.There is a release (RELEASE) to instruct in the frame flow control to be used for
Synchronous release is realized between the transmission frame stream receiving frame stream corresponding with receiving station of transmitting station, i.e. transmitting station will discharge
During a certain transmission frame stream, notice receiving station also discharges corresponding receiving frame stream.This operation can take certain channel width.
Response may be can not receive under the bad environment of channel, transmitting station also can only unilaterally discharge the transmission by timer
Frame stream.
The content of the invention
In order to solve the above technical problems, the embodiment of the present invention it is expected to provide a kind of frame method of flow control and device, frame is utilized
Timer count and idle frame stream preemption mechanism are flowed, realizes asynchronous release and the frame stream resource multiplex of frame stream.
The technical proposal of the invention is realized in this way：
In a first aspect, the embodiments of the invention provide a kind of frame method of flow control, methods described includes：
When it is determined that website does not have data transfer, the timer count of the transmission in the website/receiving frame stream is carried out
Check, the overdue transmission/receiving frame stream of timer count is discharged；
When it is determined that the website has data transfer, and when determining that docking frame stream available free in the website can use, profit
Data transmission link is established with the idle docking frame stream to be transmitted data.
It is described when it is determined that website does not have data transfer in such scheme, to the transmission in the website/receiving frame stream
Timer count is checked, the overdue transmission/receiving frame stream of timer count is discharged, including：
When it is determined that website does not have data transfer, the timer count of the transmission/receiving frame stream is checked, obtained
Timer count after renewal；
When it is determined that the timer count after the renewal of the transmission/receiving frame stream expires, by the transmission/receiving frame stream
Directly discharged.
It is described when it is determined that website does not have data transfer in such scheme, to the timer meter of the transmission/receiving frame stream
Number is checked, obtains the timer count after renewal, including：
If including data in the transmission of the website/receiving frame stream, the website resets the transmission/receiving frame stream
Timer count, by the transmission after the replacement/receiving frame stream timer count be defined as renewal after first timer meter
Number；
If not being in idle condition comprising data in the transmission of the website/receiving frame stream, the website is by described in
The timer count of transmission/receiving frame stream subtracts the free time of the transmission/receiving frame stream, obtains the transmission/receiving frame
Remaining timer count is flowed, the transmission/remaining timer count of receiving frame stream is defined as to the second timing after renewal
Device counts.
In such scheme, the determination website of working as has data transfer, and determines pair available free in the website
Connect frame stream it is available when, data are transmitted using the idle docking frame stream, including：
When it is determined that the website there are transmission/reception data, source address and the destination of the transmission/reception data are obtained
Location；
When the website determines to establish number not over the transmission/receiving frame stream according to the source address and destination address
During according to transmission link, the idle docking frame stream is searched；
Data transmission link is established using the idle docking frame stream to be transmitted the transmission/reception data.
It is described when the website is determined not over transmission/receiving frame according to source address and destination address in such scheme
When stream establishes data transmission link, the idle docking frame stream is searched, including：
When the website determines to establish data transfer chain not over transmission/receiving frame stream according to source address and destination address
Lu Shi, in the unappropriated docking frame stream of its own lookup；
When it is determined that the website do not have it is unappropriated docking frame stream when, the website from its own it is allocated docking frame stream
It is middle to search idle docking frame stream.
It is described to establish data transmission link to the transmission/reception using the idle docking frame stream in such scheme
Data are transmitted, including：
What lookup timer count remaining time was most short from the idle docking frame stream faces phase idle docking frame stream；
The website faces phase idle docking frame according to utilizing the source address and destination address of the transmission/reception data
Stream establishes the data transmission link, and data buffer storage is distributed from common buffer pool according to the source address and destination address；
Corresponding send/receive operation is carried out to the transmission/reception data according to the data buffer storage of the distribution,
Complete to discharge after the send/receive operation data buffer storage of the distribution.
Second aspect, the embodiments of the invention provide a kind of frame flow control device, described device includes：Check module, release
Amplification module and transport module；Wherein,
The inspection module, for when it is determined that website does not have data transfer, to the transmission in the website/receiving frame stream
Timer count checked；
The release module, for the overdue transmission/receiving frame stream of timer count to be discharged；
The transport module, for having data transfer when the determination website, and determine available free in the website
When docking frame stream is available, establishes data transmission link using the idle docking frame stream and data are transmitted.
In such scheme, described device also includes：Acquisition module；Wherein,
The acquisition module, for when it is determined that website does not have data transfer, to the timer of the transmission/receiving frame stream
Counting is checked, obtains the timer count after renewal；
The release module, for when it is determined that the timer count after the renewal of the transmission/receiving frame stream expires, inciting somebody to action
The transmission/receiving frame stream is directly discharged.
In such scheme, the inspection module includes：Reset submodule, determination sub-module and subtraction submodule；Wherein,
The replacement submodule, if for including data, the website weight in transmission/receiving frame stream of the website
Put the timer count of the transmission/receiving frame stream；
The determination sub-module, after the transmission after the replacement/receiving frame stream timer count is defined as into renewal
First timer count；
The subtraction submodule, if for not being in idle shape comprising data in transmission/receiving frame stream of the website
State, then the website timer count of the transmission/receiving frame stream is subtracted to the free time of the transmission/receiving frame stream,
Obtain the transmission/remaining timer count of receiving frame stream；
The determination sub-module, it is additionally operable to after the transmission/remaining timer count of receiving frame stream is defined as into renewal
Second timer count.
In such scheme, described device also includes：Searching modul；Wherein,
The acquisition module, for when it is determined that the website has transmission/reception data, obtaining the transmission/reception number
According to source address and destination address；
The searching modul, for being determined when the website according to the source address and destination address not over the hair
Give/receiving frame stream is when establishing data transmission link, the idle docking frame stream is searched；
The transport module, send/connect to described for establishing data transmission link using the idle docking frame stream
Data are received to be transmitted.
In such scheme, the searching modul, for being determined when the website according to source address and destination address without logical
When crossing transmission/receiving frame stream and establishing data transmission link, in the unappropriated docking frame stream of its own lookup；
And when it is determined that the website does not have unappropriated docking frame stream, the website is allocated right from its own
Connect the docking frame stream that the free time is searched in frame stream.
In such scheme, described device also includes：Distribute module；Wherein,
The searching modul, most short face for searching timer count remaining time from the idle docking frame stream
Phase idle docking frame stream；
The distribute module, utilized for the website according to the source address and destination address of the transmission/reception data
The phase idle docking frame stream that faces establishes the data transmission link, and according to the source address and destination address from shared buffer memory
Data buffer storage is distributed in pond；
The release module, the transmission/reception data are carried out for the data buffer storage according to the distribution corresponding
Send/receive operation, the data buffer storage of the distribution is discharged after the send/receive operation is completed.
The embodiments of the invention provide a kind of frame method of flow control and device, when website does not have data transfer, utilizes frame
Stream timer count determines overdue frame stream, and overdue frame stream is discharged；When website has data transfer, the free time is seized
Frame stream is transmitted to data, realizes the asynchronous release of frame stream and the resource multiplex of frame stream.
Brief description of the drawings
Fig. 1 is power line communication network topological diagram；
Fig. 2 is the data transmission link schematic diagram in power line communication network topology；
Fig. 3 is that a kind of frame method of flow control that the embodiment of the present invention one provides implements schematic flow sheet；
Fig. 4 is a kind of frame method of flow control schematic flow sheet that the embodiment of the present invention two provides；
Fig. 5 is the method flow schematic diagram discharged to frame stream that the embodiment of the present invention two provides；
Fig. 6 is the method flow schematic diagram of the timer count after the acquisition renewal that the embodiment of the present invention two provides；
Fig. 7 is the method flow signal being transmitted using idle docking frame stream to data that the embodiment of the present invention two provides
Figure；
Fig. 8 is the method flow schematic diagram for the idle docking frame stream of lookup that the embodiment of the present invention two provides；
Fig. 9 is the specific method flow being transmitted using idle docking frame stream to data that the embodiment of the present invention two provides
Schematic diagram；
Figure 10 is the method flow schematic diagram that the another kind that the embodiment of the present invention three provides is discharged to frame stream；
Figure 11 is that the frame stream in the power line communication network topology that the embodiment of the present invention three provides discharges schematic diagram；
Figure 12 is another method being transmitted using idle docking frame stream to data that the embodiment of the present invention four provides
Schematic flow sheet；
Figure 13 is that the frame stream in the power line communication network topology that the embodiment of the present invention four provides is multiplexed schematic diagram；
Figure 14 is that the frame stream in the power line communication network topology that the embodiment of the present invention four provides recovers schematic diagram；
Figure 15 is a kind of frame flow control device structural representation that the embodiment of the present invention five provides；
Figure 16 is another frame flow control device structural representation that the embodiment of the present invention five provides；
Figure 17 is the inspection modular structure schematic diagram that the embodiment of the present invention five provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.
Referring to Fig. 1, it is power line communication network topology schematic diagram, has three substations below parent web A shown in Fig. 1
Point, respectively website B, website C, website D.There are two substation points, respectively website E, website F below website C.It is assumed that each station
Point maximum has two to send frame stream (TX1 and TX2) and two receiving frame streams (RX1 and RX2).Pass through transmission/receiving frame between website
Stream establishes data transmission link, realizes data transmission/reception.As shown in Fig. 2 by taking website A as an example, website A TX2 and website C
RX1 establish the link that slave site A sends data toward website C, while website A TX1 and website B RX1 are established
Slave site A sends the link of data toward website B.By Fig. 2 it can also be seen that website B TX1 and website A RX1 establish from
Website B sends the link of data toward website A, while website C TX1 and website A RX2 establishes slave site C and sent out toward website A
Send the link of data.Two transmission frame streams (TX1 and TX2) and two receiving frame streams (RX1 and RX2) in so website A are all divided
Transmission frame stream or receiving frame stream not with website B and website C constitute data transmission link, it is established that after data transmission link just
Data can be transmitted.
In a particular application, the transmission of each website/receiving frame stream many more than two, it is assumed that be N number of.The present invention passes through frame stream
Timer count and idle frame stream preemption mechanism, realize the asynchronous release of frame stream and the resource multiplex of frame stream between website so that
Website can keep data to communicate with more than N number of website simultaneously on the premise of only N number of transmission/receiving frame stream.
Embodiment one
Referring to Fig. 3, it illustrates the embodiment of the present invention to provide a kind of frame method of flow control, and methods described can include：
S101, judge whether website there are transmission/reception data, if website there are transmission/reception data, perform step S102
With step S103；If website does not have transmission/reception data, step S106 to S108 is performed.
If S102, website there are transmission/reception data, source address/destination address letter of transmitted/reception data is obtained
Breath.
It is to be appreciated that if website transmission in need/reception data, need to obtain required transmission/reception data
Source address/destination address information, to be transmitted or receive to data.
S103, judged whether according to source address/destination address information to establish transmissions links by transmission/receiving frame stream,
If judging to establish transmissions links by transmission/receiving frame stream, step S104 and S105 are performed；If judge not over
Transmission/receiving frame stream establishes transmissions links, then performs step S109.
If S104, establishing transmissions links by transmission/receiving frame stream, according to source address/destination address information from altogether
Enjoy and data buffer storage is distributed in cache pool.
It should be noted that because transmission of the website to data or reception need to establish transmission by transmission/receiving frame stream
Data could be transmitted or be received after link, therefore only after transmission/receiving frame stream sets up transmissions links, number
According to could be transmitted in the link.
S105, the operation according to the data buffer storage completion transmission/reception data distributed, after discharging the transmission/reception
Data caching.
If S106, website do not have transmission/reception data, the data included to transmission/receiving frame stream check.
If including data in S1061, transmission/receiving frame stream, timer count is reset.
It should be noted that when creating transmission/receiving frame stream, a timer is just set.Set in timer
Maximum duration existing for data transmission link energy representated by time expression one transmission/receiving frame stream.Send the timing of frame stream
Cycle is the interval of giving out a contract for a project more than or equal to former and later two messages on the data transmission link sent representated by frame stream, can be according to reality
Border business demand selects a fixed value.The timing cycle of receiving frame stream is more than the timing cycle for sending frame stream, is so set
Purpose be in order to ensure it is more late than the transmission frame stream of the sending side of same data transmission link under normal circumstances be released, equally
Also a fixed value can be selected according to practical business demand.
When there are data to be transmitted or receiving, timer count is reset, in order to ensure transmission/receiving frame stream
Active state.
If not being in idle condition comprising data in S1062, transmission/receiving frame stream, the counting of timer is subtracted
The free time of transmission/receiving frame stream.
It should be noted that by the counting of timer subtract free time be due to transmission/receiving frame currently without comprising
Data, show that transmission/receiving frame is currently at idle condition, it is necessary to which the counting of timer to be subtracted to the time of free time, it is fixed to calculate
When device residual count, i.e. transmission/receiving frame remaining time.
S107, judge whether the timer count of transmission/receiving frame stream expires, if the timer meter of transmission/receiving frame stream
The phase is counted to, then performs step S108；If the timer count of transmission/receiving frame stream does not expire, step S101 is re-executed.
S108, the timer count of transmission/receiving frame stream discharge overdue transmission/receiving frame stream, re-execute step
S101。
If the timer count of transmission/receiving frame stream expires, illustrate the data transfer representated by the transmission/receiving frame stream
The survival period of link terminates, and can discharge transmission/receiving frame stream.
If S109, not over transmission/receiving frame stream establishing transmissions links, determine whether unappropriated to send/connect
Frame stream is received, if there is unappropriated transmission/receiving frame stream, performs step S110；If there is not unappropriated transmission/receiving frame
Stream, then perform step S111.
If S110, having unappropriated transmission/receiving frame stream, initialize transmission/receiving frame stream of acquisition, establish send/
Receives link, jump to step S104.
Although it is to be appreciated that there are transmission/reception data in website, establish and pass not over transmission/receiving frame stream
Defeated link, if transmission/receiving frame stream without distribution in website now be present, transmission/receiving frame of acquisition can be initialized
Stream, transmission/receives link is set up by transmission/receiving frame stream.Step S104 is jumped to by said process can to complete
The operation of transmission/reception data.
If S111, without unappropriated transmission/receiving frame stream, judge whether available free transmission/receiving frame stream, if having
Idle transmission/receiving frame stream, then perform step S112；If without available free transmission/receiving frame stream, step is performed
S113。
If S112, available free transmission/receiving frame stream, seize idle transmission/receiving frame stream, from existing idle hair
Give/receiving frame stream in choose a remaining time-to-live most short frame stream, then branch to step S110.
It should be noted that most short frame stream of remaining time-to-live is chosen here, in order in the transmission/connect of free time
Receive the idle transmission/receiving frame stream for selecting an activity most short in frame stream to be used to it, timer count will be arrived
Idle transmission/receiving frame of phase fluently uses.
If S113, transmission/receiving frame stream without the free time, abandon the data of transmission/reception, jump to step S106.
If it is to be appreciated that without transmission/receiving frame stream of free time, transmission can not be established by transmission/receiving frame stream
Link is transmitted/received to data, now, the data of transmission/reception is abandoned, jump to step S106 to transmission/reception
The data that frame stream is included are checked.
The embodiments of the invention provide a kind of frame method of flow control, when website does not have data transfer, utilizes the timing of frame stream
Device, which counts, determines overdue frame stream, and overdue frame stream is discharged；When website has data transfer, the frame stream pair of free time is seized
Data are transmitted, and realize the asynchronous release of frame stream and the resource multiplex of frame stream.
Embodiment two
Referring to Fig. 4, it illustrates the embodiment of the present invention to provide a kind of frame method of flow control, and methods described can include：
S201, when it is determined that website does not have data transfer, to the timer count of the transmission in the website/receiving frame stream
Checked, the overdue transmission/receiving frame stream of timer count is discharged.
Referring to Fig. 5, specifically, step S201 includes step S2011 and S2012：
S2011, when it is determined that website does not have data transfer, the timer count of the transmission/receiving frame stream is examined
Look into, obtain the timer count after renewal.
It is to be appreciated that when website does not have data to need transmission, just consideration it is sent/receiving frame stream releases
Put, release and take.Release to transmission/receiving frame stream is whether the timer count based on transmission/receiving frame expires to judge
, therefore the timer count of transmission/receiving frame stream is updated first, it is determined that transmission/receiving frame stream timer is remaining
Time.
Referring to Fig. 6, specifically, step S2011 includes S20111 and S20112：
If including data in the transmission of S20111, the website/receiving frame stream, the website replacement transmission/
The timer count of receiving frame stream, first transmission after the replacement/receiving frame stream timer count is defined as after renewal
Timer count.
If it is to be appreciated that still include data in transmission/receiving frame stream, it will not be discharged, it is necessary to
Its timer count is reset, to keep its activity.Explanation is needed exist for, when website does not have data transfer,
The reason for may including data in transmission/receiving frame stream is, it is possible to which the data transmitted are a long messages.Reported to long
Text, which is divided into when being repeatedly transmitted, needs longer time, therefore occurs that website does not have data to need to transmit, but frame
But still including data in stream needs to transmit.
If idle condition, the website are not in it comprising data in the transmission of S20112, the website/receiving frame stream
The timer count of the transmission/receiving frame stream is subtracted to the free time of the transmission/receiving frame stream, obtain it is described send/
The remaining timer count of receiving frame stream, the transmission/remaining timer count of receiving frame stream is defined as after renewal
Two timer counts.
Specifically, if not illustrating that it is in idle condition comprising data in the transmission of website/receiving frame stream.Frame stream
Idle condition refer to, refer to the frame stream comprising sending data or receive data, and the data transfer chain representated by the frame stream
The still undue transmission/receiving frame stream on road.In order to determine the remaining timer count of idle frame stream, therefore, by the frame stream
Timer count subtracts the free time of the frame stream, can so obtain the timer time still remaining of the current frame stream.With
Whether the above method is expired for follow-up judgment frame stream timer and prepared it may determine that go out the decay of time.
S2012, when it is determined that the timer count after the renewal of the transmission/receiving frame stream expires, send described/connect
Frame stream is received directly to be discharged.
Understandably, if it is determined that the timer count after the renewal of transmission/receiving frame stream expires, then can pair
It is directly discharged.Frame stream after release can be reused for the transmission or reception of other data.
S202, when it is determined that the website has data transfer, and determine that docking frame stream available free in the website can use
When, establish data transmission link using the idle docking frame stream and data are transmitted.
Referring to Fig. 7, specifically, step S202 includes step S2021 to S2023：
S2021, when it is determined that the website has transmission/reception data, obtain the transmission/reception data source address and
Destination address.
It should be noted that the source address and destination address of transmission/reception data are for the identification to frame stream, that is, work as station
When point there are transmission/reception data, corresponding transmission/receiving frame stream can be identified by source address and destination address.
S2022, determined according to the source address and destination address not over the transmission/receiving frame stream when the website
When establishing data transmission link, the idle docking frame stream is searched.
Referring to Fig. 8, specifically, step S2022 includes step S20221 and S20222：
S20221, determined according to source address and destination address to establish number not over transmission/receiving frame stream when the website
During according to transmission link, in the unappropriated docking frame stream of its own lookup.
It should be noted that not identifying the frame stream of docking by source address and destination address, indicate that in the website
In in advance do not distribute docking frame stream data are transmitted.In this case, it is unappropriated to search its in the station first
Dock frame stream.
Wherein, unappropriated docking frame stream refers to, is not previously allocated the transmission or reception for any data in the station
Frame stream.
S20222, when it is determined that the website do not have it is unappropriated docking frame stream when, the website is allocated from its own
The docking frame stream of free time is searched in docking frame stream.
It is to be appreciated that if website does not have unappropriated docking frame stream, show all frame streams in the website all
It is allocated, now needs to be transmitted data the docking frame stream for just needing that the free time is searched in the allocated docking frame stream,
The docking frame stream of free time is multiplexed.
S2023, establish data transmission link using the idle docking frame stream transmission/reception data are passed
It is defeated.
Referring to Fig. 9, specifically, step S2023 includes step S20231 to S20233：
S20231, search from the idle docking frame stream timer count remaining time it is most short face phase idle docking
Frame stream.
It should be noted that the idle docking frame stream found out in the station is possible to more than one, found out
Idle docking frame stream in find out timer count remaining time it is most short face free time phase receiving frame stream, be multiplexed it.Its
In, face phase idle docking frame flow table and show free time docking frame stream will most to be expired soon in all idle docking frame streams found out
Frame stream.
S20232, the website face phase sky according to utilizing the source address and destination address of the transmission/reception data
Spare time docking frame stream establishes the data transmission link, and number is distributed from common buffer pool according to the source address and destination address
According to caching.
Specifically, its corresponding data transmission link is established using facing phase idle docking frame stream can, it is established that data
Website can is transmitted to data after transmission link.Data are transmitted firstly the need of in common buffer pool to be passed
Defeated data distribution data buffer storage.
S20233, corresponding transmission/reception carried out to the transmission/reception data according to the data buffer storage of the distribution
Operation, the data buffer storage of the distribution is discharged after the send/receive operation is completed.
It is to be appreciated that data are sent out by the in store data for needing to send or receive in data buffer storage accordingly
After sending or receiving, the data buffer storage distributed before is subjected to occupancy of the release releasing to caching.
The embodiments of the invention provide a kind of frame method of flow control, when website does not have data transfer, utilizes the timing of frame stream
Device, which counts, determines overdue frame stream, and overdue frame stream is discharged；When website has data transfer, the frame stream pair of free time is seized
Data are transmitted, and realize the asynchronous release of frame stream and the resource multiplex of frame stream.
Embodiment three
Referring to Figure 10, it illustrates the embodiment of the present invention to provide a kind of frame method of flow control, for passing through frame stream timer
Count, the asynchronous release of frame stream is realized between the first website and the second website, methods described can include：
S301, the first website send data to the second website by sending frame stream, and reset determining for the transmission frame stream
When device count.
It should be noted that when the first website and second station point carry out data transmission, the first website is by sending frame
Stream sends data to the second website.Now, the receiving frame stream for sending frame stream and the second website of the first website is by establishing number
Data are enable to be transmitted between two websites according to transmission link.
A timer is just set when the first Website Building sends frame stream, when having data transmission just
The timer for sending frame stream is reset, it is kept active state.
S302, the receiving frame stream of second website receive the data sent transmitted by frame stream, and connect described in replacement
Receive the timer count of frame stream.
It is to be appreciated that the data that the transmission frame stream of the first website is sent are sent to second station by data transmission link
Point, the data that now the transmission frame stream of receiving frame stream the first website of reception of the second website is transmitted.
It should also be noted that, by synch command, the receiving frame stream for sending frame stream and the second website of the first website
Timer count is to maintain synchronous.The timing cycle for sending frame stream is more than or equal to the data transfer chain sent representated by frame stream
The interval of giving out a contract for a project of former and later two messages on road, can select a fixed value according to practical business demand.The timing week of receiving frame stream
Phase be more than send frame stream timing cycle, ensure under normal circumstances than same data transmission link sending side transmission frame
Stream is more late to be released, and a fixed value can be selected according to practical business demand.
S303, when first website does not have data to send to second website, the transmission to first website
Frame stream is checked, obtains the timer count after renewal.
Specifically, the first website is after data transmission task is completed, however, it is determined that it does not have new data to send to second station
Point, then the transmission frame stream to the first website is needed to check.The content checked includes：It is in the transmission frame stream of first website
It is no also to include data, and, whether the timer count for sending frame stream expires.
Transmission frame streams of the step S303 to the first website checks, obtains the timer count after renewal, specifically includes
Following two situations：
If the first, including data in the transmission frame stream of first website, first website resets the transmission frame
The timer count of stream, the transmission frame stream timer count after the replacement is defined as to the first timer after renewal and counted.
It is to be appreciated that if still including data in the transmission frame stream of the first website needs to send, then needs to hair
The timer count of frame stream is sent to be reset.What is reset act as sending the timer progress reclocking of frame stream, with holding
The activity of data transmission link representated by the transmission frame stream, ensures the transmission of data.
If the 2nd, idle condition, first website are not in it comprising data in the transmission frame stream of first website
The timer count of the transmission frame stream is subtracted to the free time of the transmission frame stream, it is remaining fixed to obtain the transmission frame stream
When device count, by it is described transmission the remaining timer count of frame stream be defined as renewal after second timer count.
If it is to be appreciated that not being in idle condition comprising data in the transmission frame stream of the first website, illustrate current
Sending frame stream does not have new data to need to send, then the timer count for sending frame stream is subtracted and sends frame stream by the first website
Free time, the remaining time counting of transmission frame stream timer is obtained, that is, the second timer after updating counts.Above-mentioned renewal
Second timer afterwards is counted for judging whether the timer count of the transmission frame stream expires.
S304, when it is determined that it is described send frame stream renewal after timer count expire when, by it is described transmission frame stream it is direct
Discharged.
It should be noted that the timer count for determining to send after the renewal of frame stream expires, show to send the timing of frame stream
Device is counted and expired, then no longer takes the transmission frame stream, it is discharged.
S305, when the receiving frame stream of second website be not received by first website send frame stream transmitted by
During data, the timer count of the receiving frame stream is without renewal.
It is to be appreciated that if the receiving frame stream of the second website is not received by the number sent transmitted by frame stream of the first website
According to, then the receiving frame stream of the second website carries out time decay according to timer count, and no longer timer technique is reset
Deng renewal.
S306, when it is determined that the timer count of the receiving frame stream expires, the receiving frame stream is discharged.
It is to be appreciated that as the timer time of the receiving frame stream of the second website is decayed, when its timer count time
Decay to after zero, show that its timer count expires, then no longer it is taken, receiving frame stream is discharged, simultaneously
Its data transmission link represented is also released.
The asynchronous release that frame stream and receiving frame stream are sent in data transmission link is carried out furtherly here in conjunction with example
It is bright：
Referring to Figure 11, website C transmission frame stream TX1 is used to send data to website A, and by website A RX2 receiving frame streams
Data transmitted by receiving station C.When website C does not have data to be sent to website A, to discharge transmission frame stream TX1, when its timing
Device count expire after directly release send frame stream TX1, and now website A receiving frame stream RX2 due to timer it is not yet due still
Retain.Because website C transmission frame stream TX1 has discharged, website A receiving frame stream RX2 does not receive data, therefore will not weigh
Put its timer time.When website A receiving frame stream RX2 timer counts expire, the frame stream is also released.Finally, website C
Transmission frame stream TX1 and website A receiving frame stream RX2 be all released by timer count, realize in data transmission link
Send the asynchronous release of frame stream and receiving frame stream.
The embodiments of the invention provide a kind of frame method of flow control, when website does not have data transfer, utilizes the timing of frame stream
Device, which counts, determines overdue frame stream, and overdue frame stream is discharged, realizes the asynchronous release of frame stream.
Example IV
Referring to Figure 12, it illustrates the embodiment of the present invention to provide a kind of frame method of flow control, for being robbed by idle frame stream
Account for, realize the resource multiplex of frame stream, methods described can include：
S401, the first website send data to the second website by sending frame stream.
It is to be appreciated that the first website sends data to second station as the website sent by creating transmission frame stream
Point.
S402, second website receive the data that first website is sent, and with obtaining the source of the transmission data
Location information and destination address information.
It should be noted that transmission data can be obtained while the second website receives the data transmitted by the first website
The source address information and destination address information of middle carrying.Wherein, source address information and the destination in data except carrying are sent
Location information, it may can also carry the message such as data service classification information.
S403, second website itself are searching whether and institute according to the source address information and destination address information
State the receiving frame stream for sending the docking of frame stream.
It should be noted that by the receiving frame stream that now the second website cannot determine whether to have distributed is come to being connect
The data of receipts are cached, it is therefore desirable to are searched whether and the receiving frame stream for sending frame stream and docking at its own.
S404, when second website not itself finding with it is described transmission frame stream dock receiving frame stream when,
Judge whether its own has unappropriated receiving frame stream.
It is to be appreciated that if the second website itself is not finding and is sending the corresponding receiving frame stream of frame stream, then
It is secondary to have searched whether unappropriated receiving frame stream at its own.Wherein, unappropriated receiving frame stream refers to, the receiving frame stream does not have
As any one other website send frame stream corresponding to receiving frame stream, that is to say, that unappropriated receiving frame stream currently without
Any the receiving data buffer storage of the task.
S405, when there is no unappropriated receiving frame stream in second website, from its own allocated receiving frame stream
It is middle to search idle receiving frame stream.
It should be noted that if all receiving frame stream of the second website has been distributed, then just needs to have divided from these
The receiving frame stream of free time is found out in the receiving frame stream matched somebody with somebody.Wherein, above-mentioned idle receiving frame stream refers to, is connect in the allocated
Receive in frame stream, be currently temporarily in idle condition, do not receive the receiving frame stream of data.
S406, second website are searched timer count remaining time in the idle receiving frame stream and most short faced
Free time phase receiving frame stream, and using the free time phase receiving frame stream that faces as the receiving frame stream docked with the transmission frame stream.
Specifically, the possible more than one of idle receiving frame stream that the second website is found out, it is idle from what is found out
What lookup timer count remaining time was most short in receiving frame stream faces free time phase receiving frame stream, is released to will soon expire
Idle receiving frame stream be multiplexed, free time phase receiving frame stream will be faced and maximumlly utilized.
S407, second website initialize to the free time phase receiving frame stream that faces, and make described to face the phase and idle receive
Frame stream sets up data transmission link with the transmission frame stream.
It is to be appreciated that find with send frame stream dock face free time phase receiving frame stream after, so that it may connect so as to face free time phase
Receive frame stream and set up data transmission link with sending frame stream, to realize the management to data buffer storage.
S408, second website distribute according to the source address information and destination address information from common buffer pool
Data buffer storage, receive the data for sending frame stream and sending.
Specifically, according to the source address information of data transmitted by the first website and destination address information, the second website is from altogether
Enjoy distributed in cache pool data buffer storage to data transmitted by the first website receive.
S409, second website are discharged the data buffer storage of the distribution after the completion of data receiver.
Specifically, because data buffer storage resource is wired, therefore the second website is after the reception of data is completed, i.e.,
The data buffer storage distributed is discharged, by caching of the caching for other data after release.
Referring to Figure 13, the resource multiplex of receiving frame stream is further described here in conjunction with example：
Under resource stressful situation, the multiplexing of receiving frame stream resource is realized by idle frame stream preemption mechanism.In fig. 2,
The available frame streams that send and receive of website A only have two, but to maintain to communicate with three websites B, C, D, keep network topology to close
It is and carries out data transmission.When website A and website D are communicated it is necessary to which obtained as procedure described above according to actual conditions can
Frame stream.Under the scene shown in Figure 13, website A receive website D transmission data message after, extract message source address and
Destination address.Then the receiving frame stream according to corresponding to having searched whether source address and destination address.If without allocated reception
Frame stream is docked with website D transmission frame stream, then searches whether website A has unappropriated receiving frame stream.If website A is not without
The receiving frame stream of distribution, then found out from allocated frame stream RX1 and RX2 in idle condition and timer remaining time it is most short
Receiving frame stream, it is assumed here that the receiving frame stream for meeting above-mentioned condition is RX2.After finding receiving frame stream RX2, receiving frame is initialized
RX2 is flowed, and data transmission link is established with website D, completes the reception processing of data.
It should be noted that the embodiment of the present invention is only illustrated using the resource multiplex of receiving frame stream as example, it is above-mentioned to connect
The resource multiplexing method for receiving frame stream is applied equally to send the resource multiplex of frame stream in website.
It should also be noted that, the above method is seized by idle frame stream, the resource multiplex of frame stream is realized.To such scheme
In the data transmission link that is destroyed because of being preempted can be recovered.Referring to Figure 14, with reference to example pair because be preempted and
The recovery process of the data transmission link of destruction is further described：
In the resource multiplex example of above-mentioned receiving frame stream, during being communicated due to website A and website D, website A
Occupied from allocated frame stream RX1 and RX2 in idle condition and timer remaining time most short receiving frame stream, therefore
Script website C sends data to the data transmission link set up during website A because website A receiving frame stream RX2 is preempted temporarily
It is interrupted, as shown in figure 13, A receiving frame stream RX2 and website D TX1 establish new data transmission link.It is assumed that implement
Website C transmission frame stream has new data to be sent to website A, and website A reception again before being released in the example of example three
Frame stream RX1 is just at idle condition.So, it is identical with the resource multiplex of above-mentioned receiving frame stream, website A idle receiving frame stream
RX1 can be initialised and for receiving the data from website C.
The embodiments of the invention provide a kind of frame method of flow control, when website has data transfer, seizes the frame stream of free time
Data are transmitted, realize the resource multiplex of frame stream.
Embodiment five
Based on above-described embodiment, referring to Figure 15, the embodiment of the present invention provides a kind of frame flow control device 15, the frame stream control
Device 15 processed includes：Check module 1501, release module 1502 and transport module 1503；Wherein,
The inspection module 1501, for when it is determined that website does not have data transfer, to transmission/reception in the website
The timer count of frame stream is checked；
The release module 1502, for the overdue transmission/receiving frame stream of timer count to be discharged；
The transport module 1503, for having data transfer when the determination website, and determine to have time in the website
When not busy docking frame stream is available, establishes data transmission link using the idle docking frame stream and data are transmitted.
Further, also include referring to Figure 16, described device：Acquisition module 1504；Wherein,
The acquisition module 1504, for when it is determined that website does not have data transfer, determining the transmission/receiving frame stream
When device count checked, obtain renewal after timer count；
The release module 1502, expired for the timer count after renewal of the transmission/receiving frame stream is determined
When, the transmission/receiving frame stream is directly discharged.
Further, include referring to Figure 17, the inspection module 1501：Reset submodule 1505, determination sub-module 1506
With subtraction submodule 1507；Wherein,
The replacement submodule 1505, if for including data, the station in transmission/receiving frame stream of the website
Point resets the timer count of the transmission/receiving frame stream；
The determination sub-module 1506, for the transmission after the replacement/receiving frame stream timer count to be defined as more
First timer after new counts；
The subtraction submodule 1507, if for not being in sky comprising data in transmission/receiving frame stream of the website
Not busy state, the then when timer count of the transmission/receiving frame stream is subtracted the free time of the transmission/receiving frame stream by the website
Between, obtain the transmission/remaining timer count of receiving frame stream；
The determination sub-module 1506, it is additionally operable to the transmission/remaining timer count of receiving frame stream being defined as more
Second timer after new counts.
Further, also include referring to Figure 16, described device：Searching modul 1508；Wherein,
The acquisition module 1504, for when it is determined that the website there are transmission/reception data, obtain and described send/connect
Receive the source address and destination address of data；
The searching modul 1508, for being determined when the website according to the source address and destination address not over institute
When stating transmission/receiving frame stream and establishing data transmission link, the idle docking frame stream is searched；
The transport module 1503, for establishing data transmission link to the hair using the idle docking frame stream
Send/receive data to be transmitted.
Further, the searching modul 1508, for determining do not have according to source address and destination address when the website
When establishing data transmission link by transmission/receiving frame stream, in the unappropriated docking frame stream of its own lookup；
And when it is determined that the website does not have unappropriated docking frame stream, the website is allocated right from its own
Connect the docking frame stream that the free time is searched in frame stream.
Further, also include referring to Figure 16, described device：Distribute module 1509；Wherein,
The searching modul 1508, it is most short for searching timer count remaining time from the idle docking frame stream
Face free time phase receiving frame stream；
The distribute module 1509, source address and destination address for the website according to the transmission/reception data
The data transmission link is established using the phase idle docking frame stream that faces, and according to the source address and destination address from shared
Data buffer storage is distributed in cache pool；
The release module 1502, phase is carried out to the transmission/reception data for the data buffer storage according to the distribution
Corresponding send/receive operation, the data buffer storage of the distribution is discharged after the send/receive operation is completed.
Specifically, the explanation of frame flow control device provided in an embodiment of the present invention may be referred to embodiment one to example IV
Frame method of flow control explanation, the embodiment of the present invention will not be repeated here.
In actual applications, it is described inspection module 1501, release module 1502, transport module 1503, acquisition module 1504,
Resetting submodule 1505, determination sub-module 1506, subtraction submodule 1507, searching modul 1508 and distribute module 1509 can be by
Central processing unit (Central Processing Unit, CPU), microprocessor (Micro in frame flow control device 15
Processor Unit, MPU), digital signal processor (Digital Signal Processor, DSP) or field-programmable
Gate array (Field Programmable Gate Array, FPGA) etc. is realized.
The embodiments of the invention provide a kind of frame flow control device, when website does not have data transfer, utilizes the timing of frame stream
Device, which counts, determines overdue frame stream, and overdue frame stream is discharged；When website has data transfer, the frame stream pair of free time is seized
Data are transmitted, and realize the asynchronous release of frame stream and the resource multiplex of frame stream.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the shape of the embodiment in terms of the present invention can use hardware embodiment, software implementation or combination software and hardware
Formula.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more to use storage
The form for the computer program product that medium is implemented on (including but is not limited to magnetic disk storage and optical memory etc.).
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (12)
1. a kind of frame method of flow control, it is characterised in that methods described includes：
When it is determined that website does not have data transfer, the timer count of the transmission in the website/receiving frame stream is checked,
The overdue transmission/receiving frame the stream of timer count is discharged；
When it is determined that the website has data transfer, and when determining that docking frame stream available free in the website can use, institute is utilized
The docking frame stream for stating the free time establishes data transmission link data is transmitted.
2. according to the method for claim 1, it is characterised in that it is described when it is determined that website does not have data transfer, to described
The timer count of transmission/receiving frame stream in website is checked, by the overdue transmission/receiving frame stream of timer count
Discharged, including：
When it is determined that website does not have data transfer, the timer count of the transmission/receiving frame stream is checked, obtains renewal
Timer count afterwards；
It is when it is determined that the timer count after the renewal of the transmission/receiving frame stream expires, the transmission/receiving frame stream is direct
Discharged.
3. according to the method for claim 2, it is characterised in that it is described when it is determined that website does not have data transfer, to described
The timer count of transmission/receiving frame stream is checked, obtains the timer count after renewal, including：
If including data in the transmission of the website/receiving frame stream, the website resets determining for the transmission/receiving frame stream
When device count, by the transmission after the replacement/receiving frame stream timer count be defined as renewal after first timer count；
If not being in idle condition comprising data in the transmission of the website/receiving frame stream, the website by it is described send/
The timer count of receiving frame stream subtracts the free time of the transmission/receiving frame stream, and it is remaining to obtain the transmission/receiving frame stream
Timer count, by the transmission/remaining timer count of receiving frame stream be defined as renewal after second timer count.
4. according to the method for claim 1, it is characterised in that the determination website of working as has data transfer, and really
When available free docking frame stream is available in the fixed website, data are transmitted using the idle docking frame stream, including：
When it is determined that the website there are transmission/reception data, the source address and destination address of the transmission/reception data are obtained；
When the website determines that establishing data not over the transmission/receiving frame stream passes according to the source address and destination address
During transmission link, the idle docking frame stream is searched；
Data transmission link is established using the idle docking frame stream to be transmitted the transmission/reception data.
5. according to the method for claim 4, it is characterised in that described when the website is true according to source address and destination address
When determining to establish data transmission link not over transmission/receiving frame stream, the idle docking frame stream is searched, including：
When the website determines to establish data transmission link not over transmission/receiving frame stream according to source address and destination address
When, in the unappropriated docking frame stream of its own lookup；
When it is determined that the website does not have unappropriated docking frame stream, the website is looked into from its own allocated docking frame stream
Look for the docking frame stream of free time.
6. according to the method for claim 4, it is characterised in that described to establish data biography using the idle docking frame stream
Transmission link is transmitted to the transmission/reception data, including：
What lookup timer count remaining time was most short from the idle docking frame stream faces phase idle docking frame stream；
The website faces phase idle docking frame stream according to utilizing the source address and destination address of the transmission/reception data and built
The data transmission link is found, and data buffer storage is distributed from common buffer pool according to the source address and destination address；
Corresponding send/receive operation is carried out to the transmission/reception data according to the data buffer storage of the distribution, completed
The data buffer storage of the distribution is discharged after the send/receive operation.
7. a kind of frame flow control device, it is characterised in that described device includes：Check module, release module and transport module；Its
In,
The inspection module, for when it is determined that website does not have data transfer, to determining for the transmission in the website/receiving frame stream
When device count checked；
The release module, for the overdue transmission/receiving frame stream of timer count to be discharged；
The transport module, for having data transfer when the determination website, and determine docking available free in the website
When frame stream can use, establish data transmission link using the idle docking frame stream and data are transmitted.
8. device according to claim 7, it is characterised in that described device also includes：Acquisition module；Wherein,
The acquisition module, for when it is determined that website does not have data transfer, to the timer count of the transmission/receiving frame stream
Checked, obtain the timer count after renewal；
The release module, described in when it is determined that the timer count after the renewal of the transmission/receiving frame stream expires, inciting somebody to action
Transmission/receiving frame stream is directly discharged.
9. device according to claim 8, it is characterised in that the inspection module includes：Reset submodule, determine submodule
Block and subtraction submodule；Wherein,
The replacement submodule, if for including data in transmission/receiving frame stream of the website, the website resets institute
State the timer count of transmission/receiving frame stream；
The determination sub-module, for the transmission after the replacement/receiving frame stream timer count is defined as after renewal the
One timer count；
The subtraction submodule, if for not being in idle condition comprising data in transmission/receiving frame stream of the website,
The website subtracts the timer count of the transmission/receiving frame stream the free time of the transmission/receiving frame stream, obtains institute
State transmission/remaining timer count of receiving frame stream；
The determination sub-module, it is additionally operable to for the transmission/remaining timer count of receiving frame stream to be defined as the after renewal
Two timer counts.
10. device according to claim 7, it is characterised in that described device also includes：Searching modul；Wherein,
The acquisition module, for when it is determined that the website has transmission/reception data, obtaining the transmission/reception data
Source address and destination address；
The searching modul, for when the website according to the source address and destination address determine not over it is described send/
When receiving frame stream establishes data transmission link, the idle docking frame stream is searched；
The transport module, for establishing data transmission link to the transmission/reception number using the idle docking frame stream
According to being transmitted.
11. device according to claim 10, it is characterised in that
The searching modul, for being determined when the website according to source address and destination address not over transmission/receiving frame stream
When establishing data transmission link, in the unappropriated docking frame stream of its own lookup；
And when it is determined that the website does not have unappropriated docking frame stream, the website is from its own allocated docking frame
The docking frame stream of free time is searched in stream.
12. device according to claim 10, it is characterised in that described device also includes：Distribute module；Wherein,
The searching modul, for from the idle docking frame stream search timer count remaining time it is most short face the phase sky
Spare time docking frame stream；
The distribute module, for the website according to utilizing the source address and destination address of the transmission/reception data
Face phase idle docking frame stream and establish the data transmission link, and according to the source address and destination address from common buffer pool
Distribute data buffer storage；
The release module, the transmission/reception data are carried out with corresponding hair for the data buffer storage according to the distribution
Operation is sent/received, the data buffer storage of the distribution is discharged after the send/receive operation is completed.
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| PCT/CN2017/089080 WO2018014688A1 (en) | 2016-07-18 | 2017-06-19 | Frame stream control method and device, and computer storage medium |
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| CN107634914B (en) | 2021-01-22 |
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