CN106254264B - A kind of asymmetric network transmission protocol design method - Google Patents
A kind of asymmetric network transmission protocol design method Download PDFInfo
- Publication number
- CN106254264B CN106254264B CN201610635247.XA CN201610635247A CN106254264B CN 106254264 B CN106254264 B CN 106254264B CN 201610635247 A CN201610635247 A CN 201610635247A CN 106254264 B CN106254264 B CN 106254264B
- Authority
- CN
- China
- Prior art keywords
- data packet
- cong
- ack
- congestion window
- parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 46
- 238000013461 design Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012790 confirmation Methods 0.000 claims abstract description 32
- 238000007373 indentation Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000454 anti-cipatory effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/27—Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention relates to Internet of Things field of network transmission, more particularly to a kind of asymmetric network transmission protocol design method.This method comprises: establishing includes parameter Sack, parameter WcongConfirmation data packet, in the data packet retransmission stage, if be restricted node be transmitting terminal, enable WcongBe equal to nothing the corresponding data packet serial number received, and will be in the data packet that received indentation caching；Receiving end is by parameter SackAnd WcongIt is sent to transmitting terminal；Transmitting terminal receives parameter SackAnd WcongAfter execute data recovering algorithms；Being restricted node is receiving end, and the serial number of data packet in S1 is copied to Wcong, receiving end receives WcongAfter judge whether there is 3 WcongIt is equal, and if it exists, then to execute data recovering algorithms；Otherwise stop.The effective solution problem that communication efficiency is low and the consumption energy is excessive caused by symmetric protocol at this stage.
Description
Technical field
The present invention relates to Internet of Things field of network transmission, more particularly to a kind of asymmetric network transmission protocol design side
Method.
Background technique
Internet of things sensors node typically is provided with one or more sensors, they are responsible for acquiring specific data, and pass through
These data are reported to the end host of internet by communication modes end to end.Node in Internet of Things is mainly by sensor section
Point, can routing node and 3 class of multi-protocol gateway composition.Due to protocol conversion, multi-protocol gateway is the bottleneck of performance.
Nowadays, Internet of Things transport network layer is often still to continue to use the ICP/IP protocol of internet with network protocol.However, passing
Sensor node is cheap, and processing and storage capacity are all very limited, is generally powered using battery, and needs with limited energy
The configuration work time as long as possible, the direct interconnection that IPv6 is realized, which is undoubtedly brought to the low node of ability, greatly to disappear
Consumption.In traditional internet, server node and client node are also unusual difference.What most network used is all
Multiple client node is connected with a server node, even if two node sides have so big difference, what traditional network used
Agreement is also symmetrically, undoubtedly to hinder communication efficiency in this way and consume the excessive energy.Also, due to the energy of sensor node
The characteristics of source finiteness, sensor low-power consumption is always problem existing for present internet of things field, so symmetric protocol causes
Communication efficiency is low and the excessive problem of the consumption energy also need it is urgently to be resolved.
Summary of the invention
The purpose of the present invention is to provide a kind of asymmetric network transmission protocol and its design methods, to solve at this stage
The problem that communication efficiency caused by symmetric protocol is low and the consumption energy is excessive.
The present invention provides a kind of asymmetric network transmission protocol design methods comprising:
S1: being arranged and record the data packet sent in data transmission procedure serial number and；
S2: establishing includes parameter Sack, parameter WcongConfirmation data packet, the parameter SackIt represents in data transmission procedure
The serial number of the data packet received and the WcongParameter is to recall to the data packet serial number group not received；
S3: the parameter S is setackInitial value；
S4: after asymmetric agreement establishes connection, the value of congestion window cwnd is initialized；
S5: judge that transmitting terminal receives the S of receiving end transmissionackWith the data packet serial number of the transmission and whether equal, if phase
Deng progress S6；Otherwise S7 is carried out；
S6: the value of the congestion window cwnd is doubled, and records the time of return T of the confirmation data packetack；
S7: slow turn-on threshold values ssthresh is arranged according to congestion window cwnd；
S8: judging the size of congestion window cwnd Yu slow turn-on threshold values ssthresh, opens slowly if congestion window cwnd is less than
Dynamic threshold values ssthresh and generation Tack time-out, asymmetric agreement execution slowstart algorithm detect the time of return T againack
Value；Otherwise congestion avoidance algorithm is executed；
S9: judge whether the serial number of the data packet of received serial number and transmission is identical, if they are the same, then terminates；Otherwise it carries out
S10；
S10: to be restricted node be transmitting terminal is still receiving end for judgement:
If being restricted node is transmitting terminal, S11 is carried out, if being restricted node is receiving end, carries out S12；
S11: W is enabledcongBe equal to nothing the corresponding data packet serial number received, and will be in the data packet that received indentation caching；
Receiving end is by the parameter SackAnd WcongIt is sent to transmitting terminal；Transmitting terminal receives the parameter SackAnd WcongIt is extensive that data are executed afterwards
Double calculation method；
S12: the serial number of data packet in the S1 is copied to Wcong, receiving end receives WcongAfter judge whether there is 3
WcongIt is equal, and if it exists, then to execute data recovering algorithms；Otherwise stop.
In some embodiments, preferably, the congestion avoidance algorithm includes: record time of return TackAfterwards, congestion window
Cwnd increase to the reciprocal of the value of cwnd and the value of cwnd and；After transmitting terminal receives the confirmation data packet, congestion window
Cwnd linearly increases.
In some embodiments, preferably, the data recovering algorithms include:
S13: by congestion window cwnd be set as slow turn-on threshold values ssthresh's and 3 and；
S14: to be restricted node be transmitting terminal is still receiving end for judgement:
If being restricted node is transmitting terminal, S15 is carried out, if being restricted node is receiving end, carries out S16；
S15: after transmitting terminal receives confirmation data packet, congestion window cwnd is increased by 3；
S16: after receiving end receives confirmation data packet, judging whether that Retransmission timeout occurs, if sending when generation time-out weight
When biography, 1 is set by congestion window cwnd, slow turn-on threshold values ssthresh is set as the half of congestion window cwnd, and executes
Slow turn-on；Otherwise congestion avoidance algorithm is executed.
In some embodiments, preferably, agreement connection asymmetric for one, slow turn-on threshold values ssthresh are generally set
It is set to 65535 bytes.
In some embodiments, preferably, the initial value of parameter Sack is 0 in the S3.
In some embodiments, preferably, congestion window cwnd is set by slow turn-on threshold values ssthresh in the S7
Half.
In some embodiments, preferably, the congestion window cwnd linearly increases are as follows: congestion window cwnd increases by 1.
Asymmetric network transmission protocol design method provided in an embodiment of the present invention proposes compared with prior art
Include parameter Sack, parameter WcongConfirmation data packet, when be restricted node be transmitting terminal when, take opened up for server end it is slow
The mode deposited is reduced because of loss of data, and bring mass data retransmits.Node is restricted because largely counting caused by loss of data
According to phenomenon is retransmitted, undoubtedly very big energy loss can be brought to node is restricted, so this mode is taken to be restricted to reduce
Connect the transmission of node.In a circulation, after waiting data transmission, add W for confirmation data packetcongParameter, to recall to
The data segment not received.It is that packet loss or data packet disorder cause due to not knowing when being restricted node is receiving end
Without arrive expected data packet, so working as WcongWhen there are 3 equal values, that is, data-bag lost is thought, at this time immediately by this
Confirmation data packet sends sender to.If because expected data packet is not received by by what random ordering generated, then generally existing
WcongWhen having 1 or 2, out-of-order problem will be solved, and there are three WcongWhen, a possibility that data-bag lost, just greatly increases
?.So, it is necessary to lost data packets are retransmitted, rather than until time-out occurs for time out timer.By to confirmation data
Packet addition SackAnd WcongThe setting of two parameters slows down the transmission of data.And the asymmetric data re-transmission redesigned is set
Meter, and then more demonstrate the superiority of asymmetric design.Therefore, the application not only reduce unnecessary ACK transmission and
Receive, thus slow down ACK send and receive brought by huge power consumption, and also reduce data traffic volume and for ability
The method that high node opens up caching, the communication efficiency and extension that improve network communication are restricted the service life of node.Effectively
Solve the problems, such as communication efficiency caused by symmetric protocol at this stage it is low and consumption the energy it is excessive.
Detailed description of the invention
Fig. 1 is asymmetric network transmission protocol design method step schematic diagram in one embodiment of the invention；
Fig. 2 is that asymmetric protocol network transmits schematic diagram in one embodiment of the invention；
Fig. 3 is that data packet schematic diagram is confirmed in one embodiment of the invention；
Fig. 4 is that one embodiment of the invention retransmits schematic diagram in data packet.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
For communication efficiency caused by symmetric protocol at this stage is low and the excessive problem of the consumption energy, the invention proposes
A kind of asymmetric network transmission protocol design method.As shown in Figs 1-4, it specifically includes:
The application is based primarily upon based on the communication thought of asymmetric, to transport protocol from initialization, Congestion Avoidance, number
It is retransmitted according to packet and the fast quick-recovery four-stage of data packet has carried out the design of low energy consumption to Internet of Things transport protocol, such as Fig. 1,2 institutes
Show, specifically include:
A. initialization scheme designs
When data start transmission, if transmitting terminal injects a large amount of data into network immediately, it is likely to cause
The congestion of network, due to not knowing existing load condition in a network.So we use slow turn-on side in the incipient stage
Formula, the ascending method for being gradually increased congestion window quantity, plays the role of good network detection.We establish one
Confirm data packet, includes parameter Sack, represent the sum that wheel transmission receives data packet serial number.
As shown in figure 3, when a new asymmetric agreement ATP (Asymmetric Transport Protocol, it is non-right
Claim transport protocol) establish connection after, congestion window cwnd is initialized to 1, i.e., size (this of one data packet (segement)
The size of a data packet can be determined by other side, be also possible to default value, and commonly using default value is 535k or 512k).When transmitting terminal is received
The Sack=1 sent to receiving end is correctly after value, congestion window cwnd=cwnd*2, registration confirmed data packet time of return
Tack；
The each round transmission passed through later, transmitting terminal realize cwnd=cwnd+1, hair according to confirmation packet time of return Tack
Send corresponding data packet；Receiving end according to the data packet sequence number received, be arranged Sack=be data packet serial number and, take turns data one
After the end of transmission, Sack=0 is reset；
Transmitting terminal determines Sack and has sent out data packet serial number and whether equal, and congestion window cwnd is just doubled if equal.
At this stage, congestion window cwnd increases with RTT (Round Trip Time, round-trip delay) exponentially.If unequal
It is judged as generation congestion.
As cwnd >=ssthresh, into congestion avoidance phase.
B. congestion avoidance schemes design
When network congestion (network congestion) refers to that the number for transmitting grouping in a packet switched network is too many,
The case where causing network transmission performance to decline since the resource of store-and-forward node is limited.Network congestion is a kind of sustained overload
Network state, demand of the user to Internet resources (including link bandwidth, memory space and processor processing capacity etc.) at this time
It has been more than intrinsic processing capacity and capacity.Congestion window growth is too fast in order to prevent causes network congestion, we set one
Slow turn-on threshold values ssthresh realizes that slow turn-on avoids.For an ATP connection, slow turn-on threshold values ssthresh is traditionally arranged to be
65535 bytes.
Set ssthresh ssthresh to the half of current cwnd, i.e. ssthresh=cwnd/2；
When time-out occurs, cwnd=1 is set, under the conditions of cwnd < ssthresh, ATP (Asymmetric Transport
Protocol, asymmetric transmission agreement) slow turn-on is executed, and the value of Tack is detected again；
When cwnd >=ssthresh, congestion avoidance algorithm, every a new Tack, cwnd=cwnd+1/ are executed
cwnd；As every one RTT of mistake, transmitting terminal receives correctly confirmation packet, by cwnd=cwnd+1, keeps cwnd linear with RTT
Increase.
Congestion window cwnd is slowly increased by linear rule in this way, and the congestion window rate of rise than starting algorithm slowly is slow
Much.No matter in the slow incipient stage or in congestion avoidance phase, as long as sender judges congestion occur by network, (it is according to being exactly
Do not receive confirmation) it is necessary to start sender's window value when thresholding ssthresh is set as occurring congestion slow half (but
It cannot be less than 2).Then congestion window cwnd is re-set as 1, executes slow beginning algorithm.The purpose done so seeks to fast
Speed reduces host and is sent to the packet count in network, so that the router that congestion occurs has enough time point overstock in queue
Group is disposed.
C. data packet retransmission conceptual design
During data transmission, limited due to being restricted one side's hardware resource of node, bandwidth is smaller, and communication link
Vulnerable to such environmental effects, so data packet may generate data packet packet loss phenomenon, so that influencing recipient receives data
Integrality.So we add W in data packet confirmingcongParameter returns to lost data packets serial number, if receiving confirmation data
Contain W in packetcongParameter executes data packet retransmission algorithm.As shown in figure 4, being provided with more than one W in confirmation data packetcongGinseng
Number:
(a) being restricted node is transmitting terminal
During being restricted node and server data transport, we are not difficult to find out, server end is either hard
It is all powerful more many than being restricted node in part resource or in computing capability.Due to receiving the restricted gender of communication link,
We take the mode that caching is opened up for server end, reduce because of loss of data, and bring mass data retransmits, and reduce limited
System connects the transmission of node.In a circulation, after waiting data transmission, we add W for confirmation data packetcongParameter,
To recall to the data packet serial number group not received.
When the serial number that data packet serial number and recipient's expectation that recipient receives receive is not identical, we enable WcongIt is equal to
The corresponding data packet serial number that is not received by simultaneously will be in the data packet that received indentation caching.After if RTT assert epicycle, missing
Data have n (n is less than or equal to epicycle data packet transmission quantity Sn), then receiving end returns to Sack and n WcongAnalog value.I.e.
Server returns to the n W accordingly lackedcong, and utilize caching Sn-n data of deposit.
After transmitting terminal receives this confirmation data packet, transmitting terminal judges Sack value and WcongValue be added be equal to epicycle transmit
Mutually Sack value and confirm and contain W in data packetcong, then the fast quick-recovery of fourth stage is immediately entered, all W are first restoredcong
After the data packet of missing, then carry out the transmission of next round.
In this retransmission phase, after opening up caching for server end, it is restricted node side, is subtracted significantly under corresponding probability
The re-transmission of data is lacked, so that the energy consumption for being restricted node transmission data substantially reduces.
(b) being restricted node is receiving end
It is that expected data packet is not obtained caused by packet loss or data packet disorder as not knowing, so expected
Data packet sequence number value is copied to Wcong, when receiving three identical WcongWhen, that is, think data-bag lost, it is immediately that this is true at this time
Recognize data packet and sends sender to.If because expected data packet is not received by by what random ordering generated, then generally existing
WcongWhen having 1 or 2 non-equivalence, out-of-order problem will be solved, and there are three WcongWhen, with regard to big a possibility that data-bag lost
It increases greatly.So, it is necessary to lost data packets are retransmitted, rather than until time-out occurs for time out timer.
When the serial number that data packet serial number and recipient's expectation that recipient receives receive is not identical, by anticipatory data Bao Xu
Number value is copied to WcongAnd by WcongAddition is after confirmation packet, when there is 3 WcongWhen equal, then this confirmation data packet is passed again
It send.And Sack is not further added by when not receiving the data sequence number of expectation, executes addition again until receiving；
Sender receives W in confirmation data packetcongThere are three when equal value, that is, it is vertical to think data-bag lost, then will open slowly
Dynamic threshold values ssthresh is set as the half of current cwnd, corresponding data packet is retransmitted, into quick Restoration stage.
In this process, it transmits the data of server end to increase, having ensured is restricted node side erroneous data reception
Reduction.In this way, in the way of Fast retransmission and server performance itself it is powerful, being finally reached to reduce is restricted section
The energy consumption of point.
Design asymmetric for data packet retransmission scheme, a large amount of consumption stored and transmitted by server end, significantly
Reduce the energy consumption between being restricted node.
D. data recovery scheme designs
It, can be in the case where Congestion Level SPCC appropriateness when the design of the fast quick-recovery of data is especially very big to congestion window
The larger handling capacity for improving whole network communication and reduction are restricted the energy consumption of node.
After Fast retransmission data packet, slow turn-on threshold values ssthresh+3 is set by congestion window cwnd；
It includes W that sender, which often receives a group acknowledge data,congWhen, just by congestion window cwnd+3；Increase window at this time
The reason is that often receiving a confirmation data includes Wcong, it is meant that there is a data packet correctly to leave network.If window
Mouth size allows to send, and sender just transmits a data packet；
After recipient receives correct packet, start to calculate the operation that Sack addition receives data packet serial number；WcongFor
The confirmation data packet that sky is sent sends sender to, sets cwnd=ssthresh, is transferred to Congestion Avoidance；When generation Retransmission timeout
When, ssthresh=cwnd/2, cwnd=1 are set, into slow start stage.Also, what the time-out in the present embodiment referred to is hair
Some data is given to be switched on a timer later, within a certain period of time if the ACK for the datagram not sent is reported
Text, then data are just retransmitted, until sending successfully.
Present most of internet of things use IPv6 technology, realize the direct interconnection between node really, it is no longer necessary to more
Protocol gateway.The Address Autoconfiguration of IPv6 not only branch held state, but also support stateless address configuration, it can be without artificial dry
It is that each interface configures the corresponding address IPv6 in the case where pre-.This point and WSN self-organizing, self-configuring design object very
It coincide.But IP agreement introducing cordless communication network is had always been considered as to be unpractical (completely can not be).It is so far
Only, wireless network is only with specialized protocol, because IP agreement is higher to memory and bandwidth requirement, to reduce its running environment requirement
It is highly difficult to adapt to microcontroller and low-power wireless connection.The potentiality of low power run possessed by 6LoWPAN keep it very suitable
Conjunction is applied in the equipment from hand-held set to instrument.6LowPAN technology bottom using PHY layer as defined in IEEE802.15.4 and
MAC layer, network layer continue using IPv6 agreement.Since the loaded length that in IPv6, MAC is supported is much larger than 6LowPAN bottom institute
The loaded length that can be provided, in order to realize the seamless connection of MAC layer and network layer, 6LowPAN working group suggest in network layer and
Increase a network adaptation layer between MAC layer, for completing the works such as Header compression, fragment and recombination and netted routing forwarding
Make.The reference model of 6LoWPAN protocol stack reference model and TCP/IP are substantially similar, and difference is what 6LoWPAN bottom used
IEEE 802.15.4 standard, it is desirable that PHY layer is made of the control module of RF transceiver and bottom.Media access control sublayer is high-rise visits
Ask that physical channel provides the service interface of point to point link.And because of the characteristic of Low rate wireless personal area network, introduced in 6LoWPAN
Adaptation layer, but also undoubtedly on transfer function and safety, the node for keeping ability high, which is brought, to be delayed or stagnates.It is relatively traditional
The unlimitedness of the network node energy, it is not difficult to find out that traditional network node and sensor node have extreme asymmetry.But
It is that agreement used in this application is substantially and continues to use traditional network protocol, and simultaneously for the asymmetrical relationship between them
Do not modified.So the application, at asymmetric agreement, will reduce such as wireless pass positioned at the Protocol Design of transport network layer
The energy consumption and calculating of sensor this kind energy constrained node.Traditional network node is due to the unrestricted characteristic of its energy, hair
It send, received small energy consumption, it is substantially unaffected.But low consumed characteristic is needed for sensor node,
Undoubtedly a kind of greatly consumption, in order to reduce the energy consumption of sensor, we from sensor energy consumption it is most send and receive into
Hand, by the way that a small amount of operation is added, reduction is restricted sending and receiving for node, to reduce the energy consumption for being restricted node.
It is too fast to solve the problems, such as to compare always in Internet of Things concern-sensor node energy consumption, the asymmetric agreement of this programme proposition
In terms of network communication, calculating and memory by increase ability high node, the reduction of the low node energy consumption of fulfillment capability, from
And the problem that the service life that extends node is short.
By the understanding to the field, consume energy it is not difficult to find out that sensor node consumption can be divided into 6 parts: sensing energy consumption,
Data energy consumption is handled, energy consumption is sent, receives energy consumption, idle energy consumption and suspend mode energy consumption.By literature search it is not difficult to find out that, node
Energy consumption is mainly derived from transmission, receives, and to keep sensor node energy consumption minimum, must just reduce the energy of this 2 parts of node
Consumption.
So present application mainly solves the problems, such as it is how to slow down sending and receiving for data.So the present invention is adopted
Technical solution: " self-clocking " mechanism.If receive discrete data packet, the identical ACK of number is returned,
The referred to as ACK (duplicate ACK) of redundancy.ACK to the one-to-one confirmation of data packet, increase be restricted node transmission and
It receives.The confirmation data packet S that the present embodiment proposesack, sending and receiving for unnecessary ACK is reduced, to slow down ACK hair
Huge power consumption brought by sending and receiving.Secondly, in the data packet retransmission stage, to add W in confirmation data packetcongParameter,
Return to lost data packets serial number.When being restricted node is transmitting terminal, take the mode that caching is opened up for server end, reduce because
Loss of data, and bring mass data retransmits.Be restricted node because caused by loss of data mass data retransmit phenomenon, undoubtedly
Very big energy loss can be brought to node is restricted, thus this mode is taken to be restricted the transmission for connecing node to reduce.?
In circulation, after waiting data transmission, it will confirm that data packet adds WcongParameter, to recall to the data not received
Section.It is that no arriving caused by packet loss or data packet disorder is expected as not knowing when being restricted node is receiving end
Data packet, so working as WcongWhen there are 3 equal values, that is, data-bag lost is thought, at this time immediately by this confirmation data packet transmission
To sender.If because expected data packet is not received by by what random ordering generated, then generally in WcongWhen having 1 or 2,
Out-of-order problem will solve, and there are three WcongWhen, a possibility that data-bag lost, just considerably increases.So, it is necessary to
Lost data packets are retransmitted, rather than until time-out occurs for time out timer.By adding S to confirmation data packetackAnd Wcong
The setting of two parameters slows down the transmission of data.And the asymmetric data redesigned retransmit design, more demonstrate non-
The superiority of symmetrical expression design.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of asymmetric network transmission protocol design method characterized by comprising
S1: being arranged and record the data packet sent in data transmission procedure serial number and；
S2: establishing includes parameter Sack, parameter WcongConfirmation data packet, the parameter SackIt represents in data transmission procedure and receives
Data packet serial number and, the WcongParameter is to recall to the data packet serial number group not received；
S3: the parameter S is setackInitial value；
S4: after asymmetric agreement establishes connection, the value of congestion window cwnd is initialized；
S5: judge that transmitting terminal receives the S of receiving end transmissionackWith the data packet serial number of the transmission and whether equal, if equal,
Carry out S6；Otherwise S7 is carried out；
S6: the value of the congestion window cwnd is doubled, and records the time of return T of the confirmation data packetack；
S7: slow turn-on threshold values ssthresh is arranged according to congestion window cwnd；
S8: judging the size of congestion window cwnd Yu slow turn-on threshold values ssthresh, if congestion window cwnd is less than slow turn-on valve
Value ssthresh and generation Tack time-out, asymmetric agreement execution slowstart algorithm detect the time of return T againack's
Value；Otherwise congestion avoidance algorithm is executed；
S9: judge whether the serial number of the data packet of received serial number and transmission is identical, if they are the same, then terminates；Otherwise S10 is carried out；
S10: to be restricted node be transmitting terminal is still receiving end for judgement:
If being restricted node is transmitting terminal, S11 is carried out, if being restricted node is receiving end, carries out S12；
S11: W is enabledcongBe equal to nothing the corresponding data packet serial number received, and will be in the data packet that received indentation caching；Receiving end
By the parameter SackAnd WcongIt is sent to transmitting terminal；Transmitting terminal receives the parameter SackAnd WcongAfter execute data recovering algorithms；
S12: the serial number of data packet in the S1 is copied to Wcong, receiving end receives WcongAfter judge whether there is 3 Wcong
It is equal, and if it exists, then to execute data recovering algorithms；Otherwise stop；
Wherein, the congestion avoidance algorithm includes:
Record time of return TackAfterwards, congestion window cwnd increase to the reciprocal of the value of cwnd and the value of cwnd and；Send termination
After receiving the confirmation data packet, congestion window cwnd linearly increases；
The data recovering algorithms include:
S13: by congestion window cwnd be set as slow turn-on threshold values ssthresh's and 3 and；
S14: to be restricted node be transmitting terminal is still receiving end for judgement:
If being restricted node is transmitting terminal, S15 is carried out, if being restricted node is receiving end, carries out S16；
S15: after transmitting terminal receives confirmation data packet, congestion window cwnd is increased by 3；
S16: after receiving end receives confirmation data packet, judging whether that Retransmission timeout occurs, if sending when Retransmission timeout occurs,
1 is set by congestion window cwnd, slow turn-on threshold values ssthresh is set as the half of congestion window cwnd, and executes and open slowly
It is dynamic；Otherwise congestion avoidance algorithm is executed.
2. asymmetric network transmission protocol design method as described in claim 1, which is characterized in that asymmetric for one
Agreement connection, slow turn-on threshold values ssthresh are set as 65535 bytes.
3. asymmetric network transmission protocol design method as described in claim 1, which is characterized in that parameter in the S3
SackInitial value be 0.
4. asymmetric network transmission protocol design method as described in claim 1, which is characterized in that will be opened slowly in the S7
Dynamic threshold values ssthresh is set as the half of congestion window cwnd.
5. asymmetric network transmission protocol design method as described in claim 1, which is characterized in that the congestion window
Cwnd linearly increases are as follows: congestion window cwnd increases by 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610635247.XA CN106254264B (en) | 2016-08-05 | 2016-08-05 | A kind of asymmetric network transmission protocol design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610635247.XA CN106254264B (en) | 2016-08-05 | 2016-08-05 | A kind of asymmetric network transmission protocol design method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106254264A CN106254264A (en) | 2016-12-21 |
| CN106254264B true CN106254264B (en) | 2019-04-26 |
Family
ID=58078597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610635247.XA Active CN106254264B (en) | 2016-08-05 | 2016-08-05 | A kind of asymmetric network transmission protocol design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106254264B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551378B (en) * | 2018-02-08 | 2019-09-06 | 中国航天时代电子有限公司 | A kind of radiofrequency signal remote transmission method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951386A (en) * | 2010-10-12 | 2011-01-19 | 成都卫士通信息产业股份有限公司 | Safe method for data convergence and information feedback of internet of things |
| CN103593687A (en) * | 2013-11-20 | 2014-02-19 | 北京三生创新科技发展公司 | Internet of things intelligent management control cabinet system |
| CN102752212B (en) * | 2012-07-12 | 2015-08-19 | 苏州阔地网络科技有限公司 | A kind of transmission rate control |
-
2016
- 2016-08-05 CN CN201610635247.XA patent/CN106254264B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951386A (en) * | 2010-10-12 | 2011-01-19 | 成都卫士通信息产业股份有限公司 | Safe method for data convergence and information feedback of internet of things |
| CN102752212B (en) * | 2012-07-12 | 2015-08-19 | 苏州阔地网络科技有限公司 | A kind of transmission rate control |
| CN103593687A (en) * | 2013-11-20 | 2014-02-19 | 北京三生创新科技发展公司 | Internet of things intelligent management control cabinet system |
Non-Patent Citations (2)
| Title |
|---|
| 《基于非对称方式的物联网通信协议》;何泾沙;《计算机工程》;20160228;第42卷(第2期);全文 |
| 《面向物联网的非对称通信协议涉及研究》;潘力斌;《中国优秀硕士论文全文库》;20150630;全文 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106254264A (en) | 2016-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11799790B2 (en) | Data transmission method, computing device, network device, and data transmission system | |
| CN106878191B (en) | A kind of data transferring method, sending node, receiving node and data communication system | |
| US7609697B2 (en) | Optimizing IEEE 802.11 for TCP/IP data transfer | |
| KR100785293B1 (en) | System and Method for TCP Congestion Control Using Multiple TCP ACKs | |
| JP5020076B2 (en) | High performance TCP suitable for low frequency ACK system | |
| CN108270682A (en) | A kind of message transmitting method, terminal, the network equipment and communication system | |
| TWI458296B (en) | System and method of monitoring packets in flight for optimizing packet traffic in a network | |
| CN101436978A (en) | Method for authentic data transmission using UDP protocol | |
| US11671377B2 (en) | System and method for reducing bandwidth usage of a network | |
| CN104854836A (en) | Method and system for increasing data flow transmission | |
| Alheid et al. | An analysis of the impact of out-of-order recovery algorithms on MPTCP throughput | |
| CN106254264B (en) | A kind of asymmetric network transmission protocol design method | |
| CN104580171B (en) | The transmission method of Transmission Control Protocol, device and system | |
| Anastasi et al. | TPA: a transport protocol for ad hoc networks | |
| Ayar et al. | TCP over multiple paths revisited: Towards transparent proxy solutions | |
| WO2020154872A1 (en) | Transmission control protocol acceleration method and apparatus | |
| Wang et al. | Coupled slow-start: Improving the efficiency and friendliness of mptcp's slow-start | |
| Fang et al. | Design and implementation of embedded rudp | |
| Kortas et al. | Energy consumption TCP, TCP-Reno and SCTP within cloud computing | |
| Cheng et al. | An adaptive bandwidth estimation mechanism for SCTP over wireless networks | |
| Bagde et al. | Survey of Performance based transmission control protocol in MANET | |
| Kukreja et al. | Performance Analysis of TCP in Wireless Network | |
| Francis et al. | Enhancing TCP congestion control for improved performance in wireless networks | |
| Mishra et al. | Effective impact of ECN with RED to control heavy congestion | |
| Chandra et al. | Congestion and Corruption Loss Detection with Enhanced-TCP |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240201 Address after: 101200 room 205-211526, No. 40, Fuqian West Street, Pinggu town, Pinggu District, Beijing (cluster registration) Patentee after: BEIJING YONGBO TECHNOLOGY CO.,LTD. Country or region after: China Address before: 100124 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Beijing University of Technology Country or region before: China |
|
| TR01 | Transfer of patent right |