CN111371692B - Window control method and device based on TCP (Transmission control protocol) and electronic equipment - Google Patents
Window control method and device based on TCP (Transmission control protocol) and electronic equipment Download PDFInfo
- Publication number
- CN111371692B CN111371692B CN202010173631.9A CN202010173631A CN111371692B CN 111371692 B CN111371692 B CN 111371692B CN 202010173631 A CN202010173631 A CN 202010173631A CN 111371692 B CN111371692 B CN 111371692B
- Authority
- CN
- China
- Prior art keywords
- window
- communication connection
- size
- adjustment coefficient
- transmission window
- 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
Images
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
- H04L47/22—Traffic shaping
- H04L47/225—Determination of shaping rate, e.g. using a moving window
-
- 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
- H04L47/19—Flow control; Congestion control at layers above the network layer
- H04L47/193—Flow control; Congestion control at layers above the network layer at the transport layer, e.g. TCP related
Abstract
The embodiment of the invention relates to a window control method, a device and electronic equipment based on a TCP (Transmission control protocol), wherein the method comprises the following steps: acquiring connection state parameter information of communication connection; determining a window adjustment coefficient of the communication connection according to the state parameter information of the communication connection; and adjusting the size of the transmission window corresponding to the communication connection according to the window adjustment coefficient. The window control method provided by the embodiment of the invention solves the problem that a method for effectively controlling the transmission window, dredging congestion and improving the bandwidth utilization rate is lacked at present.
Description
Technical Field
The embodiment of the invention relates to the technical field of internet transmission control, in particular to a window control method and device based on a TCP (transmission control protocol) and electronic equipment.
Background
One important issue that restricts the maximum use of network resources is network congestion. Network congestion can cause network transmission performance degradation. When network congestion occurs, data loss, delay increase, throughput decrease, and the like generally occur. Network congestion can cause congestion collapse when it is severe.
At present, the Reno algorithm and the CUBIC algorithm are mostly adopted to dredge congestion. The Reno algorithm comprises slow start, congestion avoidance, fast retransmission and fast recovery mechanisms, and an AIMD (advanced involved Multi-functional discovery) mechanism is adopted, namely, additive Increase and Multiplicative decrease are realized. This results in a long time to recover after the congestion window is reduced, the bandwidth utilization is not high, and the delay has little effect on large data transmission amount because the slow start time is only a small part of the total time, but has a great effect on small and medium data amount.
The CUBIC algorithm is improved, the CUBIC algorithm can record a congestion window when a TCP data packet is lost, the window is increased in an approximately slow-start exponential mode when the recorded congestion window is not reached, the increase step of the congestion window is greatly reduced when the recorded congestion window is close to, the increase step of the congestion window is readjusted to be approximately exponential and rapidly increased after a period of time is maintained, if the period of time is maintained only by accident, the CUBIC algorithm still rapidly increases after the period of time, and the congestion window inevitably causes more TCP data packets to be lost when network congestion occurs again, so that the network condition is further worsened.
The Reno algorithm and the CUBIC algorithm both have the following same disadvantages when performing congestion control: the congestion window needs to be increased according to a preset fixed value, the current good network bandwidth cannot be effectively utilized, an adjustment strategy which is opposite to the actual network condition and the connection data transmission requirement may be adopted, and the requirement of the application on the throughput cannot be well matched.
Therefore, how to perform window control and reduce the occurrence probability of network congestion is still an urgent problem to be solved at present.
Disclosure of Invention
At least one embodiment of the present invention provides a window control method, an apparatus and an electronic device based on a TCP protocol, which solve the problem that there is no method for effectively controlling a transmission window, dredging congestion and improving a bandwidth utilization rate.
In a first aspect, an embodiment of the present invention provides a window control method, where the method includes:
acquiring connection state parameter information of communication connection;
determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection;
and adjusting the size of the transmission window corresponding to the communication connection according to the window adjustment coefficient.
In a second aspect, an embodiment of the present invention further provides a window control apparatus, including
The connection state parameter information acquisition module is used for acquiring the connection state parameter information of the communication connection;
the window adjustment coefficient determining module is used for determining the window adjustment coefficient of the communication connection according to the state parameter information of the communication connection;
and the window size adjusting module is used for adjusting the size of the transmission window corresponding to the communication connection according to the window adjusting coefficient.
In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes: a field programmable gate array and a memory; the field programmable gate array is used for executing the steps of the method; the memory is used for storing data received and/or sent in the communication process under the control of the field programmable gate array; alternatively, the first and second electrodes may be,
the electronic device includes: application specific integrated circuits and memories; the application specific integrated circuit is used for executing the steps of the method; the memory is used for storing data received and/or transmitted in the communication process under the control of the application specific integrated circuit
The window control method provided by the embodiment of the invention obtains the connection state parameter information of communication connection; determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection; and adjusting the size of the transmission window corresponding to the communication connection according to the window adjustment coefficient, solving the problem that the method for effectively controlling the transmission window, dredging congestion and improving the bandwidth utilization rate is lacked at present, and achieving the purposes of effectively controlling the window, dredging congestion and improving the bandwidth utilization rate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a flowchart of a window control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of another window control method according to an embodiment of the present invention;
fig. 3 is a flowchart of another window control method according to an embodiment of the present invention;
FIG. 4 is a flowchart of another window control method according to an embodiment of the present invention;
fig. 5 is a block diagram of a window control apparatus according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating an implementation method of S408 in fig. 4 according to an embodiment of the present invention;
fig. 7 is a block diagram of another window control apparatus according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
As described in the background, the Reno algorithm and the CUBIC algorithm both have the following same disadvantages when performing congestion control: the congestion window needs to be increased according to a preset fixed value, the current good network bandwidth cannot be effectively utilized, an adjustment strategy which is opposite to the actual network condition and the connection data transmission requirement may be adopted, and the requirement of the application on the throughput cannot be well matched.
In view of the above, the present disclosure provides a window control method, which obtains connection state parameter information of a communication connection; determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection; according to the window adjustment coefficient, the size of the transmission window corresponding to the communication connection is adjusted, the problem that a method for effectively controlling the transmission window, dredging congestion and improving the bandwidth utilization rate is lacked at present is solved, and the purposes of effectively controlling the window, dredging congestion and improving the bandwidth utilization rate are achieved.
Fig. 1 is a flowchart of a window control method according to an embodiment of the present invention. The method can be suitable for the condition that the terminal transmits data with other terminals. The method may be performed by a terminal performing a data transmission operation. The method comprises the following steps:
and S110, acquiring the connection state parameter information of the communication connection.
The communication connection may be a communication connection based on a TCP/IP Protocol (Transmission Control Protocol/Internet Protocol), or a communication connection based on another Protocol. This is not limited by the present application.
The TCP/IP protocol refers to a protocol cluster capable of implementing information transmission among a plurality of different networks. The TCP/IP protocol refers not only to two protocols of TCP and IP, but also to a protocol cluster composed of FTP, SMTP, TCP, UDP, IP, etc., and is called TCP/IP protocol only because TCP protocol and IP protocol are most representative among TCP/IP protocols.
The present application does not limit the specific content of the connection status parameter. Optionally, the connection state parameter includes at least one of an average delay, an average data size, a peer-to-peer reception window change rate, and a packet loss rate. Further, parameters such as the average time delay, the average data volume, the change rate of the receiving window of the opposite terminal, the packet loss rate and the like can be monitored and recorded in real time, and the parameters such as the time delay, the data volume, the change rate of the receiving window of the opposite terminal, the packet loss frequency and the like of the communication connection in a period of time are counted to obtain the parameters such as the average time delay, the average data volume, the packet loss rate and the like of the communication connection.
And S120, determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection.
The implementation method of the step is various, illustratively, the corresponding relation between the connection state parameter information and the window adjustment coefficient is obtained through big data statistics or experience of workers; and respectively determining the window adjustment coefficient of each communication connection according to the connection state parameter information of at least two communication connections and the corresponding relation between the connection state parameter information and the window adjustment coefficient.
Further, this step may be implemented using a table lookup method. Specifically, the correspondence between the connection state parameter information and the window adjustment coefficient is sorted into a table. One column of the table is the window adjustment factor and the remaining columns are the connection status parameters. The current connection state parameter obtained in S110 is used to search in the table, and a current window adjustment coefficient can be obtained (the value of the connection state parameter is not necessarily required to be consistent with the value in the table, and may fall into an interval, the size division of the interval may be determined according to an actual situation, and the finer the interval is, the more the number of rows in the table is).
And S130, adjusting the size of the transmission window corresponding to the communication connection according to the window adjustment coefficient.
There are various methods for implementing this step, and illustratively, the size of the window adjustment coefficient represents the amount of change in the size of the corresponding transmission window before and after adjustment. When this step is executed, the size of the transmission window corresponding to the communication connection may be directly adjusted according to the window adjustment coefficient.
Or, optionally, the size of the window adjustment coefficient represents a degree of change of the size of the transmission window corresponding to the window before and after the adjustment, and when this step is executed, a variation of the size of the transmission window corresponding to the window before and after the adjustment is obtained based on the window adjustment coefficient, and then the size of the transmission window corresponding to the communication connection is adjusted based on the variation of the size of the transmission window corresponding to the window before and after the adjustment.
The essence of the technical scheme is that the size of the transmission window is adjusted in real time according to the connection state parameter information of the communication connection, and the variation of the sizes of the transmission windows before and after adjustment is not fixed but is dynamically determined according to the information transmission requirement and the network condition, so that the window of the communication connection can be controlled in real time, the requirement of throughput is matched, the jitter of the whole network can be reduced, the probability of communication connection congestion is reduced, and the bandwidth utilization rate of the whole network is improved.
The technical scheme provided by the invention is mainly applied to the TOE (TCP offload engine). The TOE is a TCP acceleration technology, and the software network protocol stack originally realized by a host system is processed by hardware of a special network card, so that the system load reduction is realized by reducing three aspects of system data copying, interrupt processing and protocol overhead.
Fig. 2 is a flowchart of another window control method according to an embodiment of the present invention. The method is a specific example in fig. 1. The method can be suitable for the condition that the terminal transmits data with other terminals, and is particularly suitable for the condition that the same terminal simultaneously accesses a plurality of network domains and simultaneously transmits data with a plurality of other terminals. The method may be performed by a terminal performing a data transmission operation. The method comprises the following steps:
s210, obtaining the connection state parameter information of at least two communication connections.
S220, respectively determining the window adjustment coefficient of each communication connection according to the connection state parameter information of at least two communication connections.
And S230, adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient.
The essence of the technical scheme is that the size of the transmission window is adjusted in real time according to the connection state parameter information of each communication connection, and the variation of the sizes of the transmission windows before and after adjustment is not fixed but is dynamically determined according to the requirement of information transmission, so that the window of each communication connection can be controlled in real time, the jitter of the whole network can be reduced, the probability of congestion of each communication connection is reduced, and the bandwidth utilization rate of the whole network is improved.
In the foregoing technical solution, optionally, the determining the window adjustment coefficients of each communication connection respectively includes: respectively determining a receiving window adjustment coefficient and/or a sending window adjustment coefficient of each communication connection; s230 includes: adjusting the size of a receiving window corresponding to each communication connection according to the receiving window adjustment coefficient of the communication connection; and/or adjusting the size of the sending window corresponding to each communication connection according to the sending window adjusting coefficient of the communication connection. The essence of the setting is that the receiving window and the sending window of each communication connection are controlled in real time, the jitter of the whole network is further reduced, the probability of congestion of each communication connection is reduced, and therefore the bandwidth utilization rate of the whole network is improved.
It should be noted that, if the table lookup method mentioned above is used to implement S230, optionally, one table is used for each of the receiving window and the sending window.
Fig. 3 is a flowchart of another window control method according to an embodiment of the present invention. Referring to fig. 3, the window control method includes:
s310, acquiring connection state parameter information of at least two communication connections, and executing S320.
S320, judging whether the time length between the current time and the establishment time of the communication connection (namely the communication connection establishment time length) is greater than or equal to a first preset time length; if yes, go to S330; otherwise, S340 is performed.
S330, judging whether the time length of the current time from the retransmission time of the communication connection is greater than or equal to a second preset time length; if so, go to S360, otherwise, go to S340.
S340, obtaining an initial value of the size of the transmission window, and executing S350.
There are various methods for obtaining the initial value of the transmission window, which is not limited in this application. Alternatively, it may be derived from the historical data volume of the communication connection. Specifically, a data volume expected value may be obtained by combining a smoothing algorithm with the historical data volume of the communication connection, and then an initial value of the transmission window size may be obtained with the data volume expected value.
S350, adjusting the size of the transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window.
And S360, respectively determining the window adjustment coefficient of each communication connection according to the state parameter information of at least two communication connections, and executing S370.
And S370, adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient.
The essence of the above technical solution is that the size of the transmission window corresponding to each communication connection is adjusted according to the window adjustment coefficient only when the time length from the current time to the establishment time of the communication connection is greater than or equal to a first preset time length and the time length from the current time to the retransmission time of the communication connection is greater than or equal to a second preset time length. And otherwise, adjusting the size of the transmission window corresponding to each communication connection according to the initial value of the transmission window. The reason for this is that, usually, in the initial stage of establishing the communication connection and during a period of time when retransmission just occurs, the communication connection is unstable, and the obtained window adjustment coefficient does not reflect the connection state of the current communication connection more accurately. At this time, the size of the transmission window can be planned more reasonably and effectively by using the initial value of the transmission window than by using the window adjustment coefficient.
It should be noted that, in the above technical solution, the steps of S310, S320, and S330 are sequentially executed, which is only a specific example of the present application and is not a limitation of the present application. In practice, the execution sequence of S310, S320 and S330 can be arbitrarily adjusted. Illustratively, S330, S320 and S310 may be performed first.
In the above technical solutions, when the sizes of the transmission windows corresponding to a plurality of communication connections are adjusted, the adjustment order may be arbitrary. This is not limited by the present application.
Further, corresponding to a situation that the same terminal accesses multiple network domains simultaneously, optionally, the windows of at least two communication connections have different priorities; according to the window adjustment coefficient, adjusting the size of the transmission window corresponding to each communication connection, including: and according to the priority sequence and the window adjusting coefficient, adjusting the size of the transmission window corresponding to each communication connection. The purpose of this is to make a reasonable allocation of storage space to ensure that the relatively important communication connection network is clear. There are various methods for determining the priority of the communication connection, which is not limited in this application. Illustratively, the determination is based on at least one of a frequency of the transmitted data, a data amount of the transmitted data, and a degree of importance of the transmitted data.
Further, the window adjustment coefficient can be set to include an increase type window adjustment coefficient and a decrease type window adjustment coefficient; the priority of the window corresponding to the reduction type window adjustment coefficient is higher than that of the window corresponding to the increase type window adjustment coefficient; in the window corresponding to the reduced type window adjustment coefficient, the larger the absolute value of the window adjustment coefficient is, the higher the corresponding window priority is; in the window corresponding to the increased type window adjustment coefficient, the larger the absolute value of the window adjustment coefficient is, the higher the corresponding window priority is. The reduction type window adjustment factor corresponds to an operation of reducing the transmission window. The increasing type window adjustment coefficient corresponds to an operation of increasing the transmission window. Because the transmission window is reduced to release part of the storage space occupied by the transmission window, the transmission window needing to be reduced is adjusted first, and the storage space can be released to the greatest extent, so that the released storage space can be reasonably distributed to the transmission window needing to be increased as much as possible when the transmission window needing to be increased is adjusted subsequently, and all communication connections can be in a better connection state. Whether the type window adjustment factor is decreased or increased, the larger the absolute value of the type window adjustment factor is, the more the window is congested before adjustment. Setting a window corresponding to the window adjustment coefficient of the reduction type, wherein the larger the absolute value of the window adjustment coefficient is, the higher the priority of the corresponding window is; in the window corresponding to the increased type window adjustment coefficient, the larger the absolute value of the window adjustment coefficient is, the higher the corresponding window priority is, so that the window with serious congestion can be preferentially dredged, and the overall communication effect of the whole network is ensured.
On the basis of the foregoing technical solutions, optionally, adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient includes: adjusting the size of a transmission window corresponding to the communication connection according to the reduced type window adjustment coefficient; and adjusting the size of the transmission window corresponding to the communication connection according to the increased type window adjustment coefficient, the occupied storage space of the transmission window and the residual storage space. In practice, reducing the size of the transmission window will correspondingly reduce the storage space occupied by the transmission window, and increasing the size of the transmission window requires correspondingly increasing the storage space occupied by the transmission window. Therefore, in practice, if the operation of reducing the size of the transmission window is performed, the situation that the transmission window occupies the memory space and the residual memory space does not need to be considered. When the operation of increasing the size of the transmission window is executed, if the remaining storage space is insufficient, the execution effect of increasing the size of the transmission window is restricted. Therefore, when the operation of enlarging the transmission window is performed, the occupied storage space and the remaining storage space of the transmission window need to be considered.
Fig. 4 is a flowchart of another window control method according to an embodiment of the present invention. Referring to fig. 4, the window control method includes:
s401, obtaining the connection state parameter information of at least two communication connections, and executing S402.
S402, judging whether the time length from the establishment time of the communication connection at the current time (namely the communication connection establishment time length) is greater than or equal to a first preset time length; if yes, executing S403; otherwise, S404 is performed.
S403, judging whether the time length from the current time to the retransmission time of the communication connection (namely the time length from the retransmission time) is greater than or equal to a second preset time length; if yes, go to step S406; otherwise, S404 is performed.
S404, obtaining an initial value of the transmission window size, and executing S405.
S405, adjusting the size of the transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window.
And S406, respectively determining the window adjustment coefficient of each communication connection according to the connection state parameter information of at least two communication connections, and executing S407.
And S407, determining the adjustment sequence of the transmission windows according to the window adjustment coefficients.
And S408, adjusting the size of the transmission window corresponding to the communication connection according to the adjustment sequence of the transmission windows and the adjustment coefficients of the windows.
Fig. 5 is a block diagram of a window control apparatus according to an embodiment of the present invention, and for convenience of understanding, the following describes an example of adjusting sizes of a receive window and a transmit window of a plurality of communication connections simultaneously with reference to fig. 4 and 5, and further details of the technical solution in fig. 4.
Assuming that the first preset time duration is tc, the second preset time duration is tr, and tc and tr may be equal or unequal. The values of tc and tr can be obtained according to big data statistics and can also be set according to the experience of workers. And assuming that the transmission window of m communication connections needs to be adjusted, the initial value of the reception window of the nth communication connection is wrixn. The initial value of the transmission window of the nth communication connection is wtixnWherein m and n are positive integers, and n is more than or equal to 1 and less than or equal to m. Referring to fig. 5, a transmission window size initial value determining module for determining and outputting an initial value of a reception window size as wrixnAnd an initial value of the transmission window size wtixn。
Assume that the adjusted receiving window size of the nth communication connection is wrcxn' and the adjusted transmission window has a size wtcxnIf the time length of establishing a certain communication connection is less than tc and/or the time length from the retransmission moment is less than tr, indicating that the current communication connection network is unstable, adjusting the size of the receiving window corresponding to the communication connection to wrixn(i.e., wrcxn’＝wrixn) Adjusting the size of the transmission window corresponding to the communication connection to wtixn(i.e., wtcxn’＝wtixn)。
Assume the receive window adjustment factor crx for the nth communication connectionnAnd a transmission window adjustment coefficient ctxn。crxnAnd ctxnThe window adjustment coefficient may be a positive value or a negative value, and when the window adjustment coefficient is a positive value (i.e., an increasing type window adjustment coefficient), it indicates that the window needs to be increased, and when the window adjustment coefficient is a negative value (i.e., a decreasing type window adjustment coefficient), it indicates that the window needs to be decreased. And crxn(or ctx)n) The larger the absolute value, the representation is based on crxn(or ctx)n) The larger the determined amount of change before and after adjustment of the window corresponding thereto.
If the time length of establishing a certain communication connection is greater than or equal to tc and the time length from the retransmission moment is greater than or equal to tr, the current communication connection network is stable, and a transmission window is determinedThe order of adjustment of the ports and based on the order of adjustment of the transmission windows, a receive window adjustment factor crx based on the communication connectionnAdjusting the size of a receiving window corresponding to the communication connection; adjusting the coefficient ctx according to the transmission window of the communication connectionnThe size of the transmission window corresponding to the communication connection is adjusted. Referring to fig. 5, the status monitor module is used to obtain and output the receive window adjustment factor crxnAnd a transmission window adjustment coefficient ctxn。
When determining the adjustment sequence of the transmission window, arranging the window adjustment coefficients (including the sending window adjustment coefficient and the receiving window adjustment coefficient) of all windows needing to be adjusted by the window adjustment coefficients according to a negative value and a positive value; the negative values are arranged from low to high (i.e. the absolute value is large to small), and the positive values are arranged from high to low (i.e. the absolute value is large to small), so that the adjustment sequence of the transmission window is obtained. It should be noted that, when determining the adjustment order, optionally, the transmission window adjustment coefficient and the reception window adjustment coefficient are not distinguished, and are only arranged according to the magnitude of the coefficient value, that is, the transmission window adjustment coefficient and the reception window adjustment coefficient are mixedly arranged in the same sequence.
Fig. 6 is a flowchart illustrating an implementation method of S408 in fig. 4 according to an embodiment of the present invention. Referring to fig. 6, the method of executing S408 in fig. 4 includes:
s408a, according to the adjusting sequence of the transmission windows, determining the first window to be adjusted, and executing S408 b.
S408b, according to the reduced window adjusting coefficient, determining the size of the transmission window corresponding to the adjusted communication connection, and executing S408 c.
S408c, adjusting the size of the transmission window according to the size of the transmission window corresponding to the adjusted communication connection, and executing S408 d.
S408d, updating the size of the storage space occupied by the adjusted transmission window and the adjusted remaining storage space, and executing S408 e.
When the transmission window size of the communication connection corresponding to the window adjustment coefficient of the reduction type (i.e., the window adjustment coefficient is a negative value) is adjusted, the adjustment is performed based on S408b-S408 d.
Specifically, if the adjustment target is the size of the receiving window, assume that the size of the receiving window before adjustment is wrcxnBefore adjustment, the storage space occupied by the receiving window is mem _ rx _ used _ n, the residual storage space before adjustment is mem _ idle, and the receiving window adjustment coefficient is crxnIn executing S408b, the formula wrcx may be utilizedn’＝wrcxn+wrcxn*crxnDetermining a transmission window size wrcx corresponding to the adjusted communication connectionn'. In executing S408d, the storage space occupied by the updated receiving window mem _ rx _ used _ n ═ mem _ rx _ used _ n + wrcxn*crxn(ii) a The remaining memory space mem _ idle-wrcxn*crxn。
Alternatively, if the adjustment target is the size of the transmission window, assume that the size of the transmission window before adjustment is wtcxnBefore adjustment, the storage space occupied by the sending window mem _ tx _ used _ n, the residual storage space before adjustment is mem _ idle, and the sending window adjustment coefficient is ctxnIn executing S408b, wtcx can be utilizedn’＝wtcxn+wtcxn*ctxnDetermining a transmission window size wtcx corresponding to the adjusted communication connectionn'. In executing S408d, the storage space mem _ tx _ used _ n + wtcx occupied by the updated transmission windown*ctxn(ii) a The remaining memory space mem _ idle-wtcxn*ctxn。
S408e, according to the adjusting sequence of the transmission window, determining whether the window adjusting coefficient of the next window to be adjusted is the reducing type window adjusting coefficient, if yes, executing S408b, otherwise executing S408 f.
S408f, according to the increasing type window adjusting coefficient, determining the adjusted residual storage space, and executing S408 g.
S408g, judging whether the adjusted residual storage space is larger than 0; if yes, go to S408 h; if not, go to S408 i.
S408h, according to the increasing type window adjusting coefficient, determining the size of the transmission window corresponding to the adjusted communication connection, and executing S408 j.
S408i, adjusting the size of the transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the sum of the size of the transmission window before adjustment and the remaining storage space before adjustment, and executing S408 m.
S408j, adjusting the size of the transmission window according to the size of the transmission window corresponding to the adjusted communication connection, and executing S408 k.
S408k, updating the size of the storage space occupied by the adjusted transmission window and the adjusted residual storage space, and executing S408 l;
s408l, according to the adjusting sequence of the transmission window, determining whether there is next window to be adjusted, if yes, executing S408f, otherwise executing S408 n.
S408m, updating the size of the storage space occupied by the adjusted transmission window and the remaining storage space after adjustment, wherein the size of the storage space occupied by the updated transmission window is equal to the sum of the size of the storage space occupied by the transmission window before update and the remaining storage space before update, and the remaining storage space after update is 0, and executing S408 n.
S408n, end
When the size of the transmission window of the communication connection corresponding to the increased window adjustment coefficient (that is, the window adjustment coefficient is a positive value) is adjusted, no matter whether the adjustment object is the size of the reception window or the size of the transmission window, adjustment is performed on the assumption that the window adjustment coefficient is used, and the memory space mem _ idle' remains after adjustment through S408 f. If the estimated adjusted remaining storage space mem _ idle' is larger than 0, adjusting based on S408h-S408 k; if the estimated adjusted remaining memory space mem _ idle' is less than or equal to 0, the adjustment is based on S408i-S408 m.
For example, if the adjustment target is the size of the receiving window, the adjusted remaining storage space mem _ idle' is estimated and calculated, and for example, the formula mem _ idle _ wrcxn crxn may be used to calculate. If the estimated remaining adjusted storage space mem _ idle ' is larger than 0, the size wrcxn ' of the receiving window after this adjustment is wrcxn + wrcxn crxn, the storage space is updated, the storage space mem _ rx _ used _ n ' occupied by the receiving window after the update is mem _ rx _ used _ n + wrcxn crxn, and then the next window coefficient is processed. If the estimated remaining storage space mem _ idle 'after adjustment is less than or equal to 0, the size wrcxn' of the receiving window after this adjustment is wrcxn + mem _ idle, the storage space is updated, the storage space mem _ rx _ used _ n 'occupied by the receiving window after adjustment is mem _ rx _ used _ n + mem _ idle, and the remaining storage space mem _ idle' after adjustment is 0. The size of the subsequent transmission window is not adjusted any more, so that the size of the subsequent transmission window and the memory space occupied by the transmission window remain unchanged. Here, the "subsequent transmission window" refers to a window (including a transmission window and a reception window) whose priority is after the priority of the window adjusted this time in accordance with the adjustment order of the transmission windows. In other words, the "subsequent transmission window" refers to a transmission window in which the window adjustment coefficient is a positive value and is smaller than the reception window adjustment coefficient on which the current adjustment is based.
If the adjustment object is a sending window, the adjusted remaining storage space mem _ idle' is estimated and calculated, and may be calculated by using a formula mem _ idle-wtcxn ctxn, for example. If the estimated remaining storage space mem _ idle ' after adjustment is larger than 0, the size of the sending window after this adjustment is wtcxn ' ═ wtcxn + wtcxn × ctxn, the storage space is updated, the storage space mem _ tx _ used _ n ' occupied by the receiving window after update is mem _ tx _ used _ n + wtcxn ctxn, and then the next window coefficient is processed. If the estimated remaining storage space mem _ idle ' after adjustment is less than or equal to 0, the size of the sending window after this adjustment is wtcxn + mem _ idle, the storage space is updated, the storage space mem _ tx _ used _ n ' occupied by the sending window after adjustment is mem _ tx _ used _ n + mem _ idle, and the remaining storage space mem _ idle ' after adjustment is 0. The size of the subsequent transmission window is not adjusted any more, so that the size of the subsequent transmission window and the memory space occupied by the transmission window remain unchanged. Here, the "subsequent transmission window" refers to a window (including a transmission window and a reception window) whose priority is after the priority of the window adjusted this time in accordance with the adjustment order of the transmission windows. In other words, the "subsequent transmission window" refers to a transmission window in which the window adjustment coefficient is a positive value and is smaller than the window adjustment coefficient of the transmission window adjustment coefficient on which the current adjustment is based.
Continuing with fig. 5, after all the windows are completely adjusted, the latest storage space mem _ rx _ used _ n 'occupied by each communication connection receiving window and the latest storage space mem _ tx _ used _ n' occupied by the sending window are sent to the storage management module.
The storage management module has the main functions of controlling the reading and writing of the storage, recording and updating the related storage information of the space occupied by each communication connection in real time according to the storage space mem _ rx _ used _ n 'occupied by the receiving window and the storage space mem _ tx _ used _ n' occupied by the sending window of each communication connection input by the window adjusting module. Optionally, the memory is divided into a small segments of memory space on average, and the memory management module contains a small-capacity memory with a depth of b, corresponding to the maximum number of supported communication connections. The information recorded in each line of storage space of the small-capacity memory is the number of communication connection, the number of small sections of storage space occupied by the receiving window, the number of each small section of storage space, the number of small sections of storage space occupied by the sending window, and the number of each small section of storage space. The corresponding relation of the first address of each small segment of storage space in the memory can be deduced according to the number value. And completely recording the receiving window and the sending window of each communication connection according to the a and the small segment of storage space number to store information in the memory.
The technical scheme is that the size of the congestion window is not increased continuously according to a fixed value, but the size of the transmission window is adjusted according to the current connection state and the size of the residual storage space. Due to the fact that the total bandwidth of the network is limited in practice, under the condition that the state of other communication connection is referred to, the technical scheme can avoid the situation that the sending window is too large and congestion occurs due to mutual competition among multiple communication connections as far as possible. Meanwhile, the situation that under the condition that the total amount of data transmitted by the current network is not large, a long time is needed for recovery after the congestion window is reduced is avoided, and the recovery can be carried out at the most reasonable speed. According to the technical scheme, on the premise of referring to the states of all communication connections and storage spaces, the size of the transmission window is adjusted, so that congestion can be avoided to the maximum extent, and the bandwidth utilization rate is improved. In addition, the technical scheme can control the receiving window and the sending window simultaneously. In addition, in the technical scheme, the receiving windows and the sending windows of the plurality of communication connections share the storage space, and the storage space can be utilized to the maximum extent through flexible hardware scheduling.
Based on the same inventive concept, the invention also provides a window control device. Fig. 7 is a block diagram of a window control apparatus according to the present invention. Referring to fig. 7, the window control apparatus includes a connection state parameter information acquisition module 710, a window adjustment coefficient determination module 720, and a window size adjustment module 730.
A connection status parameter information obtaining module 710, configured to obtain connection status parameter information of at least two communication connections;
a window adjustment coefficient determining module 720, configured to determine a window adjustment coefficient of each communication connection according to state parameter information of at least two communication connections;
and a window size adjusting module 730, configured to adjust the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient.
The window control device provided by the embodiment of the invention can execute the window control method provided by any embodiment of the invention, has corresponding functional modules and beneficial effects of the execution method, and is not repeated here.
Fig. 8 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention, and as shown in fig. 8, the electronic device includes: an FPGA (Field Programmable Gate Array) 810 and a memory 820. The FPGA810 is configured to execute any one of the above window control methods based on the TCP protocol; the memory 820 is used to store data received and/or transmitted during communication under the control of the FPGA 810.
Alternatively, in fig. 8, the FPGA may be replaced with an Application Specific Integrated Circuit (ASIC). An asic refers to an integrated circuit designed and manufactured to meet the needs of a particular user and a particular electronic system. At present, one of the most popular ways to design an ASIC is to use a CPLD (complex programmable logic device) and an FPGA (field programmable logic array), which have common characteristics of field programmability of users and support the boundary scan technology, but have respective characteristics in terms of integration level, speed and programming mode. The ASIC is characterized by facing the requirements of specific users, and compared with a general integrated circuit, the ASIC has the advantages of smaller volume, lower power consumption, improved reliability, improved performance, enhanced confidentiality, reduced cost and the like during batch production.
The electronic device provided by the embodiment of the invention can execute the window control method provided by any embodiment of the invention, has the corresponding functional modules and beneficial effects of the execution method, and is not described again here.
Optionally, in fig. 5, except for the memory, other modules are implemented inside the FPGA (or implemented by using a dedicated chip or other hardware), the memory and the FPGA are welded on the same board, the memory is connected to pins of the FPGA, and the FPGA can control reading and writing of the memory. The processor communicates with the FPGA over a PCIE or other high speed interface.
The source of sending data or the destination of receiving data is a processor and other matched storage devices, and the processor is communicated with the FPGA through PCIE or other high-speed interfaces. If the processor needs to send data to a certain communication connection, the processor first sends the data to the FPGA through other interfaces, the FPGA allocates a buffer space (sending window) in the memory in fig. 5, and first writes the data to be sent into the buffer space, and then reads the data and forwards the data through the network port, the optical port and the like.
The window adjusting module calculates a sending window of the communication connection according to the network state, and then transmits the sending window to the processor, and the processor adjusts the size of data sent to the FPGA in real time according to the size of the sending window (when the data to be sent is large and the sending window is small, the processor has other buffers available, and data loss cannot occur, which is out of the introduction scope of the invention).
If the processor receives data from a certain communication connection, the data is transmitted to the interior of the FPGA through the network port, the optical port and the like on the board card, the FPGA allocates a buffer space (a receiving window) in the memory in fig. 5, the data to be received is written into the memory, and then the data is read out and forwarded to the processor through other interfaces.
The window adjusting module will inform the window size to the opposite end of the connection after calculating the receiving window of the connection according to the network state, and the opposite end will control the size of the sending data (the receiving window in the invention is the maximum receiving window transmitted in the TCP protocol, and the receiving window transmitted in the protocol will change with the size of the received data).
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (11)
1. A window control method based on a TCP protocol is characterized by comprising the following steps:
acquiring connection state parameter information of communication connection;
determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection;
adjusting the size of a transmission window corresponding to the communication connection according to the window adjustment coefficient;
the number of the communication connections is at least two;
the acquiring of the connection state parameter information of the communication connection includes: acquiring connection state parameter information of at least two communication connections;
the determining a window adjustment coefficient of the communication connection according to the connection state parameter information of the communication connection includes: according to the connection state parameter information of the at least two communication connections, respectively determining a window adjustment coefficient of each communication connection;
the adjusting the size of the transmission window corresponding to the communication connection according to the window adjustment coefficient includes: adjusting the size of a transmission window corresponding to each communication connection according to the window adjustment coefficient;
before adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient, the method further includes:
determining that the time length from the current time to the establishment time of the communication connection is greater than or equal to a first preset time length; and is
Determining that the time length from the current time to the retransmission time of the communication connection is greater than or equal to a second preset time length;
further comprising:
acquiring an initial value of the transmission window;
when the time length from the current time to the establishment time of the communication connection is less than the first preset time length, adjusting the size of a transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window; alternatively, the first and second electrodes may be,
and when the time length from the current time to the retransmission time of the communication connection is less than the second preset time length, adjusting the size of the transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window.
2. The window control method according to claim 1, wherein the connection state parameter includes at least one of an average delay, an average data amount, an opposite-end reception window change rate, and a packet loss rate.
3. The window control method of claim 1, wherein said determining the window adjustment factor for each of the communication connections comprises:
respectively determining a receiving window adjustment coefficient and/or a sending window adjustment coefficient of each communication connection;
the adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient includes:
adjusting the size of a receiving window corresponding to each communication connection according to the receiving window adjustment coefficient of the communication connection; and/or the presence of a gas in the gas,
and adjusting the size of the sending window corresponding to each communication connection according to the sending window adjustment coefficient of the communication connection.
4. Window control method according to claim 1, characterized in that the windows of at least two communication connections have different priorities;
the adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient includes:
and according to the priority sequence, adjusting the size of the transmission window corresponding to each communication connection according to the window adjustment coefficient.
5. The window control method according to claim 4, wherein the window adjustment coefficient includes an increase-type window adjustment coefficient and a decrease-type window adjustment coefficient;
the priority of the window corresponding to the reduction type window adjustment coefficient is higher than that of the window corresponding to the increase type window adjustment coefficient;
in the window corresponding to the reduced type window adjustment coefficient, the larger the absolute value of the window adjustment coefficient is, the higher the priority of the corresponding window is;
in the window corresponding to the increased type window adjustment coefficient, the larger the absolute value of the window adjustment coefficient is, the higher the priority of the corresponding window is.
6. The window control method according to claim 5, wherein the adjusting the size of the transmission window corresponding to each of the communication connections according to the window adjustment coefficient includes:
adjusting the size of a transmission window corresponding to the communication connection according to the reduced type window adjustment coefficient;
and adjusting the size of the transmission window corresponding to the communication connection according to the increased type window adjustment coefficient, the occupied storage space of the transmission window and the residual storage space.
7. The window control method according to claim 6,
the adjusting the size of the transmission window corresponding to the communication connection according to the reduced type window adjustment coefficient includes:
determining the size of a transmission window corresponding to the adjusted communication connection according to the reduced type window adjustment coefficient;
adjusting the size of the transmission window according to the adjusted size of the transmission window corresponding to the communication connection;
and updating the size of the storage space occupied by the transmission window after adjustment and the rest storage space after adjustment.
8. The window control method according to claim 6,
before adjusting the size of the transmission window corresponding to the communication connection according to the increased type window adjustment coefficient, the occupied storage space of the transmission window and the remaining storage space, the method includes:
determining the adjusted residual storage space according to the increased type window adjustment coefficient;
if the adjusted remaining storage space is greater than 0, adjusting the size of the transmission window corresponding to the communication connection according to the increased type window adjustment coefficient, the occupied storage space of the transmission window, and the remaining storage space, including:
determining the size of a transmission window corresponding to the adjusted communication connection according to the increased type window adjustment coefficient;
adjusting the size of the transmission window according to the adjusted size of the transmission window corresponding to the communication connection;
and updating the size of the storage space occupied by the transmission window after adjustment and the rest storage space after adjustment.
9. The window control method according to claim 7, further comprising:
if the adjusted remaining storage space is less than or equal to 0, further comprising:
adjusting the size of a transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the sum of the size of the transmission window before adjustment and the remaining storage space before adjustment;
updating the size of the storage space occupied by the transmission window after adjustment and the remaining storage space after adjustment, wherein the size of the storage space occupied by the transmission window after update is equal to the sum of the size of the storage space occupied by the transmission window before update and the remaining storage space before update, and the remaining storage space after update is 0.
10. A window control device is characterized by comprising
The connection state parameter information acquisition module is used for acquiring the connection state parameter information of the communication connection;
the window adjustment coefficient determining module is used for determining the window adjustment coefficient of the communication connection according to the state parameter information of the communication connection;
the window size adjusting module is used for adjusting the size of a transmission window corresponding to the communication connection according to the window adjusting coefficient;
the number of the communication connections is at least two;
the connection state parameter information acquisition module is used for acquiring connection state parameter information of at least two communication connections;
the window adjustment coefficient determining module is configured to determine a window adjustment coefficient of each communication connection according to the connection state parameter information of the at least two communication connections;
the window size adjusting module is used for adjusting the size of the transmission window corresponding to each communication connection according to the window adjusting coefficient;
the window size adjusting module is further configured to determine that a duration from a current time to the establishment time of the communication connection is greater than or equal to a first preset duration before adjusting the size of the transmission window corresponding to each communication connection according to the window adjusting coefficient; determining that the time length from the current time to the retransmission time of the communication connection is greater than or equal to a second preset time length;
the window size adjusting module is further configured to obtain an initial value of the transmission window;
when the time length from the current time to the establishment time of the communication connection is less than the first preset time length, adjusting the size of a transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window; alternatively, the first and second electrodes may be,
and when the time length from the current time to the retransmission time of the communication connection is less than the second preset time length, adjusting the size of the transmission window corresponding to the communication connection, so that the adjusted size of the transmission window is equal to the initial value of the transmission window.
11. An electronic device, characterized in that the electronic device comprises: a field programmable gate array and a memory; -the field programmable gate array for performing the steps of the method according to any of claims 1 to 9; the memory is used for storing data received and/or sent in the communication process under the control of the field programmable gate array; alternatively, the first and second electrodes may be,
the electronic device includes: application specific integrated circuits and memories; -the application specific integrated circuit for performing the steps of the method according to any of claims 1 to 9; the memory is used for storing data received and/or transmitted during communication under the control of the application specific integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173631.9A CN111371692B (en) | 2020-03-13 | 2020-03-13 | Window control method and device based on TCP (Transmission control protocol) and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173631.9A CN111371692B (en) | 2020-03-13 | 2020-03-13 | Window control method and device based on TCP (Transmission control protocol) and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111371692A CN111371692A (en) | 2020-07-03 |
| CN111371692B true CN111371692B (en) | 2020-11-27 |
Family
ID=71210458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010173631.9A Active CN111371692B (en) | 2020-03-13 | 2020-03-13 | Window control method and device based on TCP (Transmission control protocol) and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111371692B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117675716A (en) * | 2024-01-26 | 2024-03-08 | 北京天维信通科技股份有限公司 | Method and device for accelerating file transmission based on modification of TCP sliding window parameters |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355462A (en) * | 2011-10-09 | 2012-02-15 | 大唐移动通信设备有限公司 | Method and device for realizing TCP (Transmission Control Protocol) transmission |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7760633B2 (en) * | 2005-11-30 | 2010-07-20 | Cisco Technology, Inc. | Transmission control protocol (TCP) congestion control using transmission delay components |
| US20100054123A1 (en) * | 2008-08-30 | 2010-03-04 | Liu Yong | Method and device for hign utilization and efficient flow control over networks with long transmission latency |
| CN102204182B (en) * | 2010-12-29 | 2013-09-11 | 华为技术有限公司 | Method and apparatus for controlling congestion of data transmission |
| CN102752076B (en) * | 2012-06-20 | 2016-08-10 | 华为技术有限公司 | Control method that data send and device and computer system |
| CN108322401B (en) * | 2017-01-17 | 2022-01-25 | 网宿科技股份有限公司 | Method and device for controlling network transmission congestion |
| CN110247853A (en) * | 2018-03-09 | 2019-09-17 | 网宿科技股份有限公司 | TCP jamming control method, system, storage medium and network server |
-
2020
- 2020-03-13 CN CN202010173631.9A patent/CN111371692B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355462A (en) * | 2011-10-09 | 2012-02-15 | 大唐移动通信设备有限公司 | Method and device for realizing TCP (Transmission Control Protocol) transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111371692A (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110278157B (en) | Congestion control method and network equipment | |
| CN109120544B (en) | Transmission control method based on host end flow scheduling in data center network | |
| EP2959645B1 (en) | Dynamic optimization of tcp connections | |
| US11310159B2 (en) | Packet sending method and apparatus, and storage device | |
| CN109714267B (en) | Transmission control method and system for managing reverse queue | |
| US20190253364A1 (en) | Method For Determining TCP Congestion Window, And Apparatus | |
| US11936569B2 (en) | Hybrid packet memory for buffering packets in network devices | |
| US20140153387A1 (en) | Tuning Congestion Notification for Data Center Networks | |
| US11782869B2 (en) | Data transmission method and related device | |
| CN108075988A (en) | Data transmission method and device | |
| CN106537867A (en) | Data transmission method, apparatus and system | |
| US11695629B2 (en) | Method and apparatus for configuring a network parameter | |
| US20220286402A1 (en) | Method and apparatus for controlling data packet sending, model training method and apparatus, and system | |
| US11165705B2 (en) | Data transmission method, device, and computer storage medium | |
| CN111371692B (en) | Window control method and device based on TCP (Transmission control protocol) and electronic equipment | |
| DE102022121268A1 (en) | CONGESTION CONTROL BASED ON NETWORK TELEMETRY | |
| US9882820B2 (en) | Communication apparatus | |
| CN109787922B (en) | Method and device for acquiring queue length and computer readable storage medium | |
| CN112491573A (en) | Network parameter configuration method and device | |
| CN115967687A (en) | Method for fast forwarding message, network device, storage medium and computer program product | |
| CN114567566A (en) | Message processing method, device, terminal equipment and storage medium | |
| CN114785744B (en) | Data processing method, device, computer equipment and storage medium | |
| CN110661731A (en) | Message processing method and device | |
| CN110300069B (en) | Data transmission method, optimization device and system | |
| JP2019114947A (en) | Communication device, control method of communication device, and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 100094 room 801, 8 / F, building 3, yard 1, 81 Beiqing Road, Haidian District, Beijing Patentee after: YUSUR TECHNOLOGY Co.,Ltd. Address before: Room 715, Institute of computing, Chinese Academy of Sciences, Haidian District, Beijing 100086 Patentee before: YUSUR TECHNOLOGY Co.,Ltd. |