CN104836742B - A kind of M2M terminals and its TCP transmission jamming control method and system - Google Patents
A kind of M2M terminals and its TCP transmission jamming control method and system Download PDFInfo
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- CN104836742B CN104836742B CN201510230570.4A CN201510230570A CN104836742B CN 104836742 B CN104836742 B CN 104836742B CN 201510230570 A CN201510230570 A CN 201510230570A CN 104836742 B CN104836742 B CN 104836742B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention relates to a kind of M2M terminals TCP transmission jamming control method and system, belong to computer communication field, this method and system are mainly judged by the network congestion situation of Internet of Things M2M terminal-pair TCP transmissions, if network congestion is serious, TCP data bag is not retransmited, signaling is sent to bottom, terminal enters resting state, so as to reduce the congestion condition of network side, and reduce power consumption of terminal, final energy is saved, while receiving terminal does corresponding adjustment also according to congestion condition, so as to reduce the network overhead of receiving terminal.
Description
Technical field
The present invention relates to a kind of M2M terminals and its TCP transmission jamming control method and system, belong to computer communication neck
Domain.
Background technology
Internet of Things (Internet of Things) is by radio frequency identification (RFID), infrared inductor, global positioning system
The information sensing devices such as system, laser scanner, by the agreement of agreement, are connected any object with internet, enter row information friendship
Change and communicate, to realize the Weigh sensor to object, positioning, tracking, monitoring and a kind of network of management.The basis of Internet of Things
It is exactly equipment and equipment communication：M2M (machine-to-machine), in this communication form, machine can be automatically performed whole
Individual communication process.M2M communication develops rapidly in recent years, is widely used in many fields, for example electron medical treatment, intelligence
Energy power network, the multimedia recreation without human intervention and leisure etc..In actual environment, M2M communication have and traditional people and
The different Some features of people's communication (H2H) business：.
M2M network structures are as shown in figure 1, the packet that M2M service nodes are transmitted every time is all very small, but is passed
The frequency of transmission of data is saved higher than H2H；M2M nodes are much more than H2H nodes；The mobility of M2M equipment is low, processing energy
Power is weak；M2M business is not strict to the demand of time delay, and M2M is applied in mobility, traffic characteristics, access conditions, excellent
The characteristics of having oneself in terms of first level, group characteristics, conventional mobile communications network is towards person to person (H2H) communication service design
, adapt to H2H business demand.
TCP is current most widely used transmission control protocol, and congestion control mechanism is its core element.With host number
When there is excessive packet in the increasing increased with data traffic of amount, network, network performance can be decreased obviously, and produce resource
Competition, causes network congestion occur.
In TCP web impact factors, transmitting terminal reduces network load by reducing TCP transmitting terminal data package transmission velocities,
Congestion control mechanism controls TCP data transmission rate by adjusting congestion window (CWND), and CWND represents TCP transmitting terminals once
The maximum data packet number that can be sent.
Common method is as shown in Fig. 2 after transmitting terminal has sent out TCP data bag, receiving terminal is received after data, if data are just
ACK is really just sent, retransmission information is otherwise just sent, if transmitting terminal encounters network congestion, CWND is reduced by, if network condition
It is good, CWND is increased by, here it is the basic thought of TCP web impact factors
Conventional TCP congestion control mechanism is a lot, the Reno of common such as cable network, the method, these methods such as Vegas
Further congestion is reduced by judging congestion condition and adjustment transmission window, congestion can be effectively reduced for TCP transmission,
But these methods are applied to cable network and general Wi-Fi.
In Internet of Things M2M terminal communications, although congestion control can reduce network congestion, but the power consumption of terminal does not have still
It is reduced, even window reduces, and the TCP sent, which is surrounded by, to be possible to be not received by, and then needs extra re-transmission, consumption
Excessive node energy.The delay requirement of other majority M2M terminal log evidences is not high, but more sensitive to power dissipation ratio, for this
The terminal of the class of sample one reduces the energy expenditure that network congestion reduces terminal simultaneously there is provided a kind of TCP jamming control methods.
The content of the invention
Problem to be solved by this invention is：In the prior art, M2M terminals are a large amount of to retransmit in TCP transmission congestion
Cause power consumption of terminal to increase, the present invention is according to current method, it is proposed that a kind of TCP transmission adaptive congestion control method, lead to
The judgement to network congestion situation is crossed, if network makes M2M terminals enter the low power consumpting state of dormancy, reduces power consumption and network number
According to flow.
To solve the above problems, the present invention proposes following technical scheme：
First technical scheme is to propose a kind of M2M terminals, including following device：
Send the device of TCP data bag；
Receive the device of TCP data bag confirmation message；
Handle the device of TCP data bag congestion state；
The device of sleep operation is carried out according to signaling control terminal hardware；
The device that dormancy is operated after terminating to hardware awake.
Preferably, such scheme further comprises：In response to sending data within a predetermined period of time, receive from server end
The device for the data come.
Preferably, such scheme is still further comprised：It is configured to, with the timestamp letter in processor acquisition packet
The device of breath.
Preferably, such scheme further comprises：It is configured to, with processor and obtains the dress for calculating the ACK numbers received
Put.
Preferably, such scheme further comprises：The dress for the correctness for sending end data and judging data can be received
Put.
Second technical scheme is to propose a kind of TCP transmission jamming control method for M2M terminals, as shown in figure 3, should
At least include M2M receiving terminals and server receiving terminal in system, including：
Step 1：M2M terminals send TCP data to receiving terminal,
Step 2：Server receiving terminal receives data,
Step 3：Server receiving terminal verification data correctness,
Step 4：Server receiving terminal sends response data ACK
Step 5：M2M terminals judge network congestion, indicate whether bottom carries out sleep operation according to congestion situation.
Preferably, step 1 further comprises the ability for initializing congestion window size.
Preferably, step 3 further comprises verifying data CRC, if CRC check passes through, sends ack msg
Wrap and give M2M terminals.
Preferably, step 5 further comprises making a decision Network Layer Congestion degree.
Preferably, further comprise when being made a decision to Network Layer Congestion degree：If reaching congestion level, stop sending
TCP data bag.
Preferably, the ACK numbers by receiving are further comprised when making a decision Network Layer Congestion degree to determine network
Congestion condition, if the ack msg bag number of times received exceedes threshold value, judges network congestion.
Preferably, the predetermined value is 3.
Preferably, M2M terminals, which have to physical layer, sends signaling, the ability for making terminal enter resting state.
Preferably, M2M terminals determine whether transmitting terminal enters resting state according to the ACK values for issuing transmitting terminal, if entered
Enter resting state, obtain the time interval of dormancy, be no longer waiting for the TCP data block of transmitting terminal.
Preferably, after further comprising that transmitting terminal resting state terminates, physical layer notifies high-rise, and high level obtains current TCP
The sequence number of transmission block.
Preferably, the time interval of the dormancy is determined according to equation below：(the size of the packet sent/(do not send out
The size+1 of the packet sent))/2
3rd technical scheme is to propose a kind of TCP transmission jamming control method being used in M2M terminal systems, such as Fig. 4
It is shown, M2M receiving terminals and server receiving terminal are at least included in the system, is comprised the following steps：
Step 1：Transmitting terminal starts to send TCP data bag, initializes congestion window (CWND) size；
Step 2：Receiving terminal is received after TCP bags, by CRC check data correctness, if correctly returning to ACK；
Step 3:Transmitting terminal makes a decision to Network Layer Congestion degree, if reaching the congestion level a of setting, reduces
CWND, continues occur TCP data block；If reaching congestion level b, stop sending TCP data bag, signaling sent to bottom,
Lower floor is connected to after signaling, into resting state；
Step 4：Receiving terminal determines whether transmitting terminal enters resting state according to the ACK values for issuing transmitting terminal, if into
Resting state, obtains the time interval of dormancy, is no longer waiting for the TCP data block of transmitting terminal；
Step 5：After transmitting terminal resting state terminates, its physical layer notifies high-rise, and high level obtains the sequence of current TCP transmission blocks
Number；
Step 6：Receiving terminal continues waiting for next TCP data block after dormancy time terminates.
Step 7：If data are sent completely, above-mentioned steps are exited, TCP links are disconnected, otherwise repeat step 1~6；
Wherein, congestion level is determined as follows described in step 3：
Determined by the measure loop response time (RTT), RTT refer to a packet from source be sent to receiving terminal up to
Source receives the time interval that the receiving terminal packet confirmation is undergone, and segments of source data can be in TCP message when sending
Timestamp is added, after receiving terminal is received, the timestamp for receiving packet is read, RTT is obtained by the time difference for calculating two；
Preferably, further comprise：Transmitting terminal sends packet, receives after ACK, if RTT values are less than threshold value 1, really
It is set to grade a, transmitting terminal adjustment window increases CWND, otherwise reduces CWND more than threshold value 1；
Preferably, further comprise：Transmitting terminal receives next ACK bags, if RTT threshold values are more than threshold value 2, at this time connects
Receiving end judges network congestion than more serious, it is determined that be grade b.
Preferably, the time interval of the dormancy is determined according to equation below：(the size of the packet sent/(do not send out
The size+1 of the packet sent))/2.
Brief description of the drawings
Fig. 1：System construction drawing of the present invention.
Fig. 2：TCP transmission congestion control schematic diagram of the present invention.
Fig. 3：One of transmitting terminal congestion control flow chart of the present invention.
Fig. 4：The two of transmitting terminal congestion control flow chart of the present invention
Fig. 5：Receiving terminal congestion control flow chart of the present invention
Fig. 6：Transmitting terminal control terminal dormancy flow chart of the present invention
Embodiment
The technical solution used in the present invention is as follows：
A kind of M2M terminals TCP transmission jamming control method and system, it is characterised in that comprise the following steps：
Step 1：M2M terminals start to send TCP data bag, initialize congestion window (CWND) size；
Step 2：Receiving terminal is received after TCP bags, by CRC check data correctness, if correctly returning to ACK；
Step 3:Transmitting terminal makes a decision to Network Layer Congestion degree, if reaching the congestion level a of setting, reduces
CWND, continues occur TCP data block；If reaching congestion level b, stop sending TCP data bag；
Step 4:Receiving terminal sends signaling to physical layer, and physical layer is connected to after signaling, and terminal enters resting state；
Step 5：Receiving terminal determines whether transmitting terminal enters resting state according to the ACK values for issuing transmitting terminal, if into
Resting state, obtains the time interval of dormancy, is no longer waiting for the TCP data block of transmitting terminal；
Step 6：After transmitting terminal resting state terminates, physical layer notifies high-rise, and high level obtains the big of current TCP transmission blocks
It is small,
Step 7：Receiving terminal continues waiting for next TCP data block after dormancy time terminates；
If data are sent completely, this flow is exited, TCP links are disconnected, otherwise repeat step 1~7.
The time interval of the dormancy is determined according to equation below：(the size of the packet sent the/(number not sent
According to the size+1 of bag)/2, unit is the second.
The sleep interval determined according to above-mentioned formula, by having sent data and not sent the relation of data,
To determine sleep interval, do not send data volume it is small in the case of, longer sleep interval can be passed through and obtain congestion
The less delivery time of chance；Conversely, do not send data volume it is big in the case of, then send these data as early as possible as much as possible, with
Avoid the long stand-by period.The time interval for taking aforesaid way to determine, can effectively improve the transmitting efficiency of packet, subtract
Low power consumption and network traffic data.
Wherein, congestion level is determined as follows described in above-mentioned steps 3
First method is as follows：
(1) determined by the measure loop response time (RTT), RTT refers to a packet and is sent to receiving terminal from source
Until source receives the time interval that the receiving terminal packet confirmation is undergone, segments of source data can be reported when sending in TCP
Timestamp is added in text, after receiving terminal is received, the timestamp for receiving packet is read, is obtained by the time difference for calculating two
RTT。
(2) transmitting terminal sends packet, receives after ACK, if RTT values are less than threshold value, transmitting terminal adjustment window, increase
CWND, otherwise reduces CWND, and the index of the threshold value is increased into 1, i.e., described threshold value increases by a particular value, is updated to new threshold
Value.
(3) terminal receives next ACK bags, if RTT threshold values are more than the new threshold value, at this time terminal judges that network is gathered around
Plug is than more serious.
As a kind of mode of priority, the mode of threshold value is updated described in above-mentioned (2) to be worth determination according to table 1：
Wherein, the content of table 1 is as follows：
| Threshold indexes | Threshold value (unit：Millisecond) |
| 1 | 100 |
| 2 | 200 |
| 3 | 500 |
| 4 | 1000 |
| 5 | 2000 |
A reference table is merely just given, for different types of M2M terminals, different index numbers can be defined
Mesh and specific numerical value, M2M terminal are to carry out access and data transfer based on packet, after accessing terminal to network, service
Terminal type is known at device end, and the delay of different types is also different, and such as radio meter register and video monitoring type prolong
It is very big with regard to difference late.Above-mentioned example has only used two of which threshold value, can also utilize different number of according to different scenes
Threshold value.
The time interval of M2M terminal sleepings can be used in addition to calculating and determining by above-mentioned formula, also and looked at random from concordance list
The mode of inquiry determines the dormancy time of terminal, the value of the sleep time inquired about as M2M terminal sleepings time interval.Due to
Concordance list mode need not be calculated, and can reduce the requirement to M2M terminal computing capabilitys.
Wherein, the content of table 2 is as follows：
| Sleep time is indexed | Value (the unit of sleep time：Second) |
| 1 | 0.5 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 10 |
| 6 | 20 |
| 7 | 30 |
| 8 | 50 |
| 9 | 100 |
| 10 | 200 |
Threshold value like above, the time of terminal sleeping is also to be determined according to specific M2M terminal types and network side,
Merely just give different in some examples, real network.
It is preferred that, the preset time value in first method is determined by upper-layer protocol configuration.
It is preferred that, the determination that time of the terminal sleeping of the configuration in first method is configured by upper-layer protocol
The second method of step 3 is as follows：
(1) number for the ACK that transmitting terminal record is received, different according to real network, realize one value of agreement, such as 3 times
ACK represents that network congestion is serious
(2) transmitting side terminal enters resting state
(3) receiving terminal is according to the ACK numbers of transmission, and if greater than 3, receiving terminal knows that transmitting terminal enters resting state, etc.
Carry out packet transmission again after dormancy terminates
It is preferred that, M2M terminals are using first method or second method by network side according to real network terminal class
Type is formulated, and notifies terminal by high-level signaling.
Wherein, the high-rise of terminal sends signaling to physical layer according to network condition, and physical layer carries out sleep operation, such as Fig. 6
It is shown.A kind of implementation method is in 3G/LTE networks, and physical layer realizes the function of type by DTX/DRX, and DTX represents not connect
Supervention is penetrated, and DRX represents discontinuous reception, and after terminal enters DTX/DRX, terminal closes RF and hardware, can so save
Energy expenditure.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (3)
1. a kind of TCP transmission jamming control method being used in M2M terminal systems, at least include in the system M2M transmitting terminals and
Server receiving terminal, it is characterised in that comprise the following steps：
Step 1：Transmitting terminal starts to send TCP data bag, initialization congestion window CWND size；
Step 2：Receiving terminal is received after TCP bags, by CRC check data correctness, if correctly returning to ACK；
Step 3：Transmitting terminal makes a decision to Network Layer Congestion degree, if reaching the congestion level a of setting, reduces described
CWND, continues occur TCP data block；If reaching congestion level b, stop sending TCP data bag, send and believe to physical layer
Order, lower floor is connected to after signaling, into resting state；
Step 4：Receiving terminal determines whether transmitting terminal enters resting state according to the ACK values for issuing transmitting terminal, if into dormancy
State, obtains the time interval of dormancy, is no longer waiting for the TCP data block of transmitting terminal；
Step 5：After transmitting terminal resting state terminates, its physical layer notifies high-rise, and high level obtains the size of current TCP transmission blocks；
Step 6：Receiving terminal continues waiting for next TCP data block after dormancy time terminates；
Step 7：If data are sent completely, above-mentioned steps are exited, TCP links are disconnected, otherwise repeat step 1~6；
Wherein, congestion level is determined as follows described in step 3：
(1) determined by measure loop response time RTT, the RTT refers to a packet, and to be sent to receiving terminal from source straight
The time interval that the receiving terminal packet confirmation is undergone is received to source, segments of source data can be in TCP message when sending
Middle addition timestamp, after receiving terminal is received, reads the timestamp for receiving packet, institute is obtained by the time difference for calculating two
State RTT；
(2) transmitting terminal sends packet, receives after ACK, if the value of the RTT is less than a threshold value, the threshold value increase by one
Particular value, is updated to new threshold value, and the congestion level is defined as the grade a, and transmitting terminal adjustment window increases the CWND,
Otherwise the CWND is reduced；
(3) receiving terminal receives next ACK bags, if the value of the RTT is more than the new threshold value, at this time receiving terminal judges net
Network congestion is than more serious, then congestion level is defined as the grade b.
2. in a kind of TCP transmission jamming control method being used in M2M terminal systems according to claim 1, step 5
The time interval of the dormancy is determined as follows：(size of the packet sent/(packet not sent it is big
Small+1))/2, unit is the second.
3. in a kind of TCP transmission jamming control method being used in M2M terminal systems according to claim 1, step 5
The time interval of the dormancy can also determine that M2M terminals index random from index according to sleep time by the way of concordance list
The value of corresponding sleep time, and the value of the time interval as the dormancy are inquired about in table, the concordance list is as shown in the table：
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| CN105933369B (en) * | 2015-12-24 | 2019-05-10 | 中国银联股份有限公司 | A kind of message forwarding method and equipment |
| CN106793130A (en) * | 2016-12-20 | 2017-05-31 | 南京邮电大学 | A kind of uplink resource allocating method under H2H and M2M terminal coexistence scenes |
| CN108737119B (en) * | 2017-04-21 | 2021-01-15 | 中国移动通信有限公司研究院 | Data transmission method, device and system |
| CN107708199B (en) * | 2017-09-26 | 2021-01-26 | 南京哈卢信息科技有限公司 | Method for improving downlink reliability of low-power-consumption wireless cellular network |
| CN108809766A (en) * | 2018-06-22 | 2018-11-13 | 北京奇艺世纪科技有限公司 | A kind of method, apparatus and system obtaining RTT |
| CN111935025B (en) * | 2020-07-08 | 2023-10-17 | 腾讯科技（深圳）有限公司 | Control method, device, equipment and medium for TCP transmission performance |
| CN113300971A (en) * | 2021-02-05 | 2021-08-24 | 阿里巴巴集团控股有限公司 | Data processing system and method |
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| CN104320809A (en) * | 2014-11-05 | 2015-01-28 | 四川九洲电器集团有限责任公司 | Wireless multi-hop network congestion control method and system based on RTT |
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Effective date of registration: 20190221 Address after: Room 509, Building 03, No. 1 Kechuang Road, Yaohua Street, Qixia District, Nanjing City, Jiangsu Province Patentee after: Nanjing Maiduo Information Technology Co., Ltd. Address before: 224051 middle road of hope Avenue, Yancheng City, Jiangsu Province, No. 1 Patentee before: Yangcheng Institute of Technology |