WO2012163305A1

WO2012163305A1 - Data transmission control method and device

Info

Publication number: WO2012163305A1
Application number: PCT/CN2012/076446
Authority: WO
Inventors: 于江; 张岩强
Original assignee: 华为技术有限公司
Priority date: 2011-06-03
Filing date: 2012-06-04
Publication date: 2012-12-06
Also published as: CN102201997A

Abstract

The embodiments of the present invention relate to a data transmission control method and device. The data transmission control method includes: acquiring a data buffer amount by means of the buffer of an intermediate node; the intermediate node controlling and adjusting the size of a congestion window value according to the size relationship between the data buffer amount and a preset threshold so that a transmission link performs data transmission according to the adjusted congestion window value. According to the embodiments of the present invention, the congestion window value is adjusted according to the size relationship between the buffer amount of the intermediate node and a preset threshold or according to a congestion window estimation value determined by the throughput and loop time delay, so that the data amount buffered by the intermediate node can be maintained at a rational value, thus it can be ensured that data will not accumulate at the intermediate node, avoiding the congestion of data flow, and therefore, the TCP data flow of each service can be balanced.

Description

Data Transmission Control Method and Apparatus The present application claims priority to Chinese Patent Application No. 201110148986.3, entitled "Data Transmission Control Method and Apparatus", filed on June 3, 2011, the entire contents of which is hereby incorporated by reference. This is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission control method and device. BACKGROUND OF THE INVENTION For a user equipment, multiple services are often performed at the same time. For example, when a web page is opened for downloading or downloaded while being uploaded, the simultaneous multi-service concurrency may be referred to as multi-service concurrency. These service application layers generally use the Transmission Control Protocol ("TCP").

For the access network equipment in the Wideband Code Division Multiple Access (WCDMA) system, the Radio Link Control (RLC) layer caches certain data. In this way, when the application layer performs multiple services at the same time, the RLC layer may have a large amount of TCP data transmission due to one service, and block the TCP data transmission of another service. For example, when the user downloads the webpage while downloading, it may be because The amount of data downloaded is too large and the web page opens too slowly.

SUMMARY OF THE INVENTION The method and device provided by the embodiments of the present invention enable equalization of TCP data flows of various services.

In one aspect, a data transmission control method is provided, including: Obtaining the data buffer amount through the cache of the intermediate node;

The intermediate node controls the size of the congestion window according to the size relationship between the data buffer and the preset threshold, so that the transmission link performs data transmission according to the adjusted congestion window value.

In one aspect, a data transmission control method is provided, including:

Obtaining the throughput and transmission control protocol loopback delay between the TCP sender and the TCP receiver;

Converting the product of the throughput rate and the loopback delay into a number of bytes, and using the converted number of bytes as a congestion window estimation value, so that the server adjusts the product of the proportional coefficient and the estimated value of the congestion window as an adjustment. The post-congestion window value causes the transmission link to transmit data according to the adjusted congestion window value.

In one aspect, a data transmission control method is provided, including:

Receiving a message sent by the intermediate node to control the size of the congestion window value;

Adjusting a congestion window value according to the message for controlling the size of the window value, so that the transmission link performs data transmission according to the adjusted congestion window value;

The message for controlling the size of the congestion window value is determined according to the size relationship between the data buffer amount and the preset threshold; or the message for controlling the size of the congestion window value is determined according to the throughput rate and the transmission control protocol. The product of the loopback delay between the TCP sender and the TCP receiver is determined by the estimated congestion window obtained by the number of bytes.

In one aspect, a data transmission control device is provided, the device comprising:

An obtaining unit, configured to acquire a data buffer amount by using an intermediate node cache;

The adjusting unit is configured to control the size of the congestion window according to the size relationship between the data buffer and the preset threshold, so that the transmission link performs data transmission according to the adjusted congestion window value.

a first acquiring unit, configured to acquire a loopback delay between a throughput rate and a transmission control protocol TCP sending end to a TCP receiving end; a first adjusting unit, configured to convert a product of the throughput rate and the loopback delay into a number of bytes, and use the converted number of bytes as a congestion window estimation value, so that the server uses the proportional coefficient and the congestion The product of the window estimate is used as the adjusted congestion window value so that the transmission link performs data transmission according to the adjusted congestion window value.

In one aspect, a server device is provided, where the server device includes: a receiving unit, configured to receive a second adjusting unit, configured by an intermediate node, to control a size of a congestion threshold value, configured to be used according to the control Adjusting the size of the window value to adjust the congestion window value, so that the transmission link performs data transmission according to the adjusted congestion window value;

According to the embodiment of the present invention, the adjustment of the CWND is implemented by the relationship between the buffer size of the intermediate node and the preset threshold or the estimated congestion window determined by the throughput rate and the loopback delay, so that the amount of data buffered by the intermediate node can be maintained. At a reasonable value, it can ensure that the data will not accumulate too much in the intermediate nodes, thus avoiding the blockage of the data stream, thereby balancing the TCP data flow of each service. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method of an embodiment of the present invention;

2 is a flow chart of a method of an embodiment of the present invention;

3 is a flow chart of a method of an embodiment of the present invention;

4 is a structural diagram of a data transmission control device according to an embodiment of the present invention;

Figure 5 is a structural diagram of a data transmission control device according to an embodiment of the present invention;

Fig. 6 is a structural diagram of a server device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objects, technical solutions, and advantages of the present invention more comprehensible, the technical solutions provided by the present invention are further described in detail below with reference to the accompanying drawings.

The technical solution of this embodiment can be applied to various communication systems, for example: GSM, Code Division Multiple Access (CDMA) system, WCDMA, Time Division Synchronous Code Division Multiple (Time Division Synchronous Code Division Multiple) Access, called TD-SCDMA), Long Term Evolution (LTE). In the GSM system, the base station is a Base Transceiver Station (BTS), and the base station control device is a Base Station Controller (BSC). In WCDMA and TD-SCDMA systems, the base station is a NodeB. The base station control device is a radio network controller (Radio Network Controller); in the LTE system, the base station is an evolved base station (eNodeB), and the base station control device is a serving gateway (Servicing Gateway, called a SGW) and a mobility management entity. (Mobile Management Entity, nickname).

1 is a flow chart of a data transmission control method according to an embodiment of the present invention. As shown in FIG. 1, the method 100 includes:

110: Obtain the data cache amount through the cache of the intermediate node.

For the WCDMA system, the intermediate node in the embodiment of the present invention may be a base station control device, or any other node between the server and the UE, for example, a TCP function enhancement entity. For the LTE system, the intermediate node may be a base station device, a base station control device, or any other node between the server and the UE.

According to an embodiment of the present invention, an intermediate node, such as a radio network controller (RNC), may acquire the data buffer amount by acquiring a size of a radio link control RLC layer cache; or, by acquiring packet data. The size of the convergence protocol PDCP layer cache acquires the data buffer amount. In the embodiment of the present invention, the data buffer amount or the normalized data buffer amount directly read from the intermediate node may be used as a data buffer amount, for example, the ratio obtained by dividing the data buffer amount by the throughput rate is used as a normalization. The amount of data cached. There are various methods for obtaining the throughput rate. For example, after obtaining the data traffic within a period of time T, the data traffic is divided by T, and the throughput rate can be obtained. It should be noted that the time T can be based on actual conditions. The setting is required, and the present invention is not limited. In addition, the method for obtaining the throughput rate is not limited to the method exemplified in the embodiment, and those skilled in the art may adopt different methods according to different needs. In this embodiment, the throughput rate may be periodically calculated, or may be obtained by measuring the air interface rate, and the throughput rate may be triggered according to an event, and the event may be, for example, predicted or monitored on the data transmission link. A bottleneck occurs. In the embodiment of the present invention, the intermediate node may obtain the throughput rate, or the other network element may notify the intermediate node after acquiring the throughput rate.

120: The intermediate node controls, according to the size relationship between the data buffer quantity and the preset threshold, to adjust a size of the congestion window, so that the transmission link performs data transmission according to the adjusted congestion window value. value.

Example 1:

When the data buffer amount is greater than the first threshold, the intermediate node sends the reduced congestion window ratio to the server, so that the server adjusts the congestion window value according to the reduced congestion window ratio.

Further, in order to obtain a more reasonable reduced congestion window ratio DWR, the intermediate node may subtract the difference between the current congestion window modification ratio CWAR minus the congestion window modification ratio DR to be reduced and the preset lower limit value LL. For comparison, a larger value is taken between the difference and the lower limit as a modified ratio of the reduced congestion window, namely:

DWR=max{ CWAR-DR, LL}.

When the data buffer amount is less than the second threshold, the intermediate node will increase the congestion window The ratio is sent to the server such that the server adjusts the congestion window value according to the increased congestion window ratio.

Further, in order to obtain a more reasonable increased congestion window ratio IWR, the intermediate node may add the current congestion window modification ratio CWAR plus the congestion value of the congestion window modification ratio IR to be increased and the preset upper limit value. The UL compares, taking a smaller value between the sum value and the upper limit value as the modified congestion window modification ratio, namely:

IWR=min{CWAR+IR, UL}. Example 2:

When the data buffer amount is greater than the first threshold, the intermediate node sends the step size AR of the reduced congestion window ratio to the server, so that the server reduces the congestion window ratio DR step size according to the need. Adjust the congestion window ratio DWR, and adjust the congestion window value according to the adjusted congestion window ratio, that is, DWR=CWAR-n*AR, where n is the number of times the congestion window ratio needs to be reduced.

When the data buffer amount is less than the second threshold, the intermediate node sends the step size AR of the increased congestion window ratio to the server, so that the server increases the congestion window ratio IR step size AR according to requirements. Adjust the congestion window ratio, and adjust the congestion window value according to the adjusted congestion window ratio, that is, IWR=CWAR+n*AR, where n is the number of times the congestion window ratio needs to be reduced. Example 3:

When the data buffer amount is greater than the first threshold, the intermediate node sends the step size AW of the reduced congestion window value to the server, so that the server steps the AW according to the required congestion window value. Adjust the congestion window value, that is, DW=CW-n*AW, where DW is to reduce the adjusted congestion window value, CW is the current congestion window value, and n is the number of times the congestion window value needs to be reduced. When the data buffer amount is less than the second threshold, the intermediate node sends the step size AW of the increased congestion window value to the server, so that the server increases the step size AW of the congestion window value according to the requirement. Adjust the congestion window value, that is, IW=CW+n*AW, where IW is to increase the adjusted congestion window value, CW is the current congestion window value, and n is the number of times the congestion window value needs to be increased. Example 4:

The intermediate node can also send the adjusted congestion window value to the server. In this case, when the data buffer amount is greater than the first threshold, the intermediate node sends the reduced congestion window value to the server, and when the data buffer amount is less than the second threshold, The increased congestion window value is sent to the server. Here, that is, the intermediate node transmits the absolute value of the congestion window to the server, and the server adjusts the congestion window value according to the reduced or increased congestion window value. Example 5

When the adjustment of the congestion window is implemented, it can also be directly completed by the intermediate node. For example, when the data buffer amount is greater than the first threshold, the intermediate node directly reduces the congestion window value or decreases the congestion window value according to the reduced congestion window ratio, and the data buffer amount is smaller than the first In the case of the second threshold, the intermediate node directly increases the congestion window value or increases the congestion window value according to the increased congestion window ratio. In other words, the intermediate node directly implements the adjustment of the congestion window value.

Example 6

The intermediate node may also send an indication to the server to adjust the congestion window value, and the server adjusts the congestion window value according to the indication. For example, when the data buffer amount is greater than the first threshold, the intermediate node sends an indication that the congestion window value is decreased to the server, so that the server root And reducing, according to the indication, a congestion window value; and when the data buffer amount is less than a second threshold, the intermediate node sends an indication that the congestion window value is increased to the server, so that the server increases according to the indication. Large congestion window value.

According to the embodiment 1-6 of the present invention, in order to avoid the occurrence of the ping-pong effect, the second threshold value may be set to be smaller than the first threshold value. Of course, the second threshold value may also be equal to the first threshold value. It is equivalent to only one threshold.

In the method of the embodiment of the present invention, the adjustment of the CWND is implemented by the relationship between the amount of the intermediate node data buffer and the preset threshold, so that the amount of data buffered by the intermediate node can be maintained at a reasonable value, thereby ensuring that the data is not in the middle. Excessive accumulation of nodes avoids congestion of data streams, which can balance the TCP data flow of each service. It can be understood that, by the method of the embodiment, the downward data transmission rate can be ensured, and no data is not sent due to insufficient buffering.

In addition, in general, the cache length (such as the RLC layer cache length) is limited. When a large number of data packets are accumulated in the cache, packet loss will occur, causing unnecessary retransmission and affecting the rate of TCP. The data transmission control method of the embodiment of the present invention adjusts the CWND value to avoid the TCP feedback delay caused by the accumulation of data in the intermediate node, thereby improving the TCP data transmission efficiency.

2 is a flow chart of another data transfer control method 200 in accordance with an embodiment of the present invention. As shown in FIG. 2, the method 200 includes:

210: The intermediate node acquires a round-trip delay RTT (Round-Trip Time, called "RTT") between the TCP transmission end and the TCP control end of the transmission control protocol. The TCP sender may be a server, or may be an intermediate node, such as an RNC, and the TCP receiver may be a user terminal; or the TCP sender is a user terminal, and the TCP receiver is a server or an intermediate node, such as an RNC. Assume that the TCP sender is the server and the receiver is the user terminal. The manner in which the loopback delay is obtained may be calculated between the time time2 when the user terminal feeds back the TCP acknowledgement message (ACK) and the time time1 when the server sends the TCP data. The difference, the difference is the loopback Delay. It should be noted that, when the intermediate node is used as the sending end, the manner of calculating the loopback delay is different, but can be obtained by referring to the prior art, and this embodiment does not exemplify. The acquisition method of the throughput rate can also be referred to the related description in 110.

220: The intermediate node converts the product of the throughput rate and the loopback delay into a number of bytes, and uses the converted number of bytes as a congestion window CWND estimation value, so that the server estimates the scale coefficient and the congestion window. The product of the values is used as the adjusted congestion window value CWND, so that the transmission link performs data transmission according to the adjusted congestion window value, for example, CWND estimated value = throughput rate *RTT/8, and CWND = CWND estimated value * ratio coefficient.

According to an embodiment, after the number of bytes obtained by the conversion is used as the congestion window estimation value, the intermediate node sends a notification message for modifying the congestion window to the server, where the notification message carries the congestion window estimation value, which is determined by the server according to the server. Congestion window estimates and scale factors adjust the congestion window value.

According to another embodiment, after the intermediate node uses the converted number of bytes as the congestion window estimation value, the intermediate coefficient is obtained by multiplying the proportional coefficient and the congestion window estimation value, and the product is used as the adjusted congestion window value. Sending the adjusted congestion window value to the server.

The general idea of the embodiment of the present invention is to determine the congestion of the current data transmission according to the data transmission parameter measured in real time, and adjust the size of the congestion window value accordingly. The embodiments of the present invention shown in Figures 1 and 2 do not select different parameters in accordance with this inventive concept to determine the congestion condition and adjust the congestion window value.

According to the method of the embodiment of the present invention, the adjustment of the CWND is implemented by the congestion window and the loopback delay determined by the loopback delay, so that the amount of data buffered by the intermediate node can be maintained at a reasonable value, thereby ensuring data is not guaranteed. Excessive accumulation in the intermediate nodes will avoid congestion of the data stream, thus balancing the TCP data flow of each service. In addition, the method of the embodiment of the present invention can also avoid the TCP feedback delay caused by the accumulation of data in the intermediate node, thereby improving the TCP data transmission efficiency. It can be understood that, by the method of the embodiment, the downward data transmission rate can be ensured, and no data is not sent due to insufficient buffering. FIG. 3 is a flow diagram of a data transfer control method 300 in accordance with an embodiment of the present invention. Method 300 is a server side implementation corresponding to method 100 of FIG. 1 or method 200 of FIG. As shown in FIG. 3, method 300 includes:

310: Receive a message sent by an intermediate node to control a size of a congestion window value;

320: Adjust a congestion window value according to the message that controls the size of the adjustment window value, so that the transmission link performs data transmission according to the adjusted congestion window value;

When the message for controlling the size of the congestion window value is determined according to the relationship between the data buffer amount and the preset threshold, corresponding to the method 100 shown in FIG. 1, the size of the window value is adjusted according to the control. The message adjustment congestion window values include:

Corresponding to the foregoing Embodiment 1, when the data buffer amount is greater than the first threshold, the server receives the reduced congestion window ratio sent by the intermediate node, and adjusts the congestion window value according to the reduced congestion window ratio; When the data buffer quantity is less than the second threshold, the server receives the increased congestion window ratio sent by the intermediate node, and adjusts the congestion window value according to the increased congestion window ratio.

Or,

Corresponding to the foregoing Embodiment 2, when the data buffer quantity is greater than the first threshold, the server receives the step size of the proportion of the congestion window that needs to be reduced sent by the intermediate node, and adjusts the step size of the congestion window ratio according to the requirement. Congestion window ratio, and adjusting the congestion window value according to the adjusted congestion window ratio; when the data buffer amount is less than the second threshold, the server receives the step size of the congestion window ratio that the intermediate node needs to increase, as needed The step size of the increased congestion window ratio adjusts the congestion window ratio, and adjusts the congestion window value according to the adjusted congestion window ratio; or Corresponding to Embodiment 3, when the data buffer quantity is greater than the first threshold, the server receives the step size of the congestion window value that needs to be reduced sent by the intermediate node, and according to the step of reducing the congestion window value. Long adjusting the congestion window value; when the data buffer amount is less than the second threshold, the server receives the step size of the congestion window value that the intermediate node needs to increase, and increases the step size of the congestion window value according to the requirement Adjust the congestion window value;

Or,

Corresponding to Embodiment 4, when the data buffer amount is greater than the first threshold, the server receives the reduced congestion window value sent by the intermediate node, and reduces the congestion window according to the reduced congestion window value. a value; the server receives an increased congestion window value sent by the intermediate node, and increases a congestion window value according to the increased congestion window value;

Or,

Corresponding to Embodiment 6 above, when the data buffer amount is greater than the first threshold, the message that is received by the server to adjust the size of the congestion window value includes an indication that the congestion window value is decreased, and according to the The indication that the congestion window value is decreased reduces the congestion window value; when the data buffer amount is less than the second threshold value, the message received by the server to adjust the size of the congestion window value includes an indication to increase the congestion window value And increasing the congestion window value according to the indication that the congestion window value is increased.

When the message for controlling the size of the congestion window value is determined according to the congestion window estimation value obtained by converting the product of the throughput rate from the loopback delay between the TCP transmission end to the TCP receiving end of the transmission control protocol into the number of bytes. Corresponding to the method 200 shown in FIG. 1 , the message adjusting the congestion window value according to the size of the control adjustment window value includes:

Receiving, by the server, a notification message for modifying a congestion window sent by the intermediate node, where the notification message carries the congestion window estimation value, and the server uses the product of the proportional coefficient and the congestion window estimation value as the adjusted congestion window value; or

The server receives the adjusted congestion window value sent by the intermediate node, where the adjusted The congestion window value is determined by the intermediate node based on a product of a scaling factor and the congestion window estimate.

According to the embodiment of the present invention, the adjustment of the CWND is implemented by the relationship between the buffer size of the intermediate node and the preset threshold or the estimated congestion window determined by the throughput rate and the loopback delay, so that the amount of data buffered by the intermediate node can be maintained. At a reasonable value, it can ensure that the data will not accumulate too much in the intermediate nodes, thus avoiding the blockage of the data stream, thereby balancing the TCP data flow of each service.

4 is a schematic structural diagram of a data transmission control device according to an embodiment of the present invention. The device 400 includes: an obtaining unit 410, configured to acquire a data buffer amount by using a cache of the intermediate node; and an adjusting unit 420, configured to control, according to the size relationship between the data buffer amount and the preset threshold, to adjust a size of the congestion window value, The transmission link is caused to perform data transmission according to the adjusted congestion window value. According to the embodiment of the present invention, the acquiring unit 410 acquires the data buffer amount by acquiring the size of the radio link control RLC layer cache; or

The data buffer amount is obtained by acquiring the size of the packet data convergence protocol PDCP layer buffer. According to an embodiment of the present invention, the adjusting unit 410 is configured to use the ratio obtained by dividing the data buffer amount by the throughput rate as a normalized data buffer amount.

According to an embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit 420 sends the reduced congestion window ratio to the server, so that the server is configured according to the reduced congestion. The window scale adjusts the congestion window value; when the data buffer amount is less than the second threshold, the adjusting unit 420 sends the increased congestion window ratio to the server, so that the server is configured according to the increased The congestion window scale adjusts the congestion window value.

According to an embodiment of the present invention, the adjusting unit 420 further includes a first comparing subunit 422, and the first comparing subunit 422 is configured to: before the adjusting unit 420 sends the reduced congestion window ratio to the server, The difference between the current congestion window modification ratio minus the reduction ratio of the congestion window to be reduced is compared with the preset lower limit value, and the difference between the difference value and the lower limit value is compared. The large value is used as the reduction ratio of the reduced congestion window. For the specific process, refer to the foregoing.

According to an embodiment of the present invention, the adjusting unit 420 further includes a second comparing subunit 424, and before transmitting the increased congestion window ratio to the server, the second comparing subunit 424 adds the current congestion window modification ratio. The sum value obtained by increasing the congestion window modification ratio is compared with a preset upper limit value, and a smaller value is taken between the sum value and the upper limit value as the increased congestion window tampering ratio.

According to the embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit 420 sends the step size of the required congestion window ratio to the server, so that the server is reduced according to needs. The step size of the congestion window ratio adjusts the congestion window ratio, and adjusts the congestion window value according to the adjusted congestion window ratio; when the data buffer amount is less than the second threshold, the adjustment unit 420 needs to increase the congestion window. The step size of the scale is sent to the server, so that the server adjusts the congestion window ratio according to the step size of the increased congestion window ratio, and adjusts the congestion window value according to the adjusted congestion window ratio.

According to the embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit 420 sends the step size of the congestion window value that needs to be reduced to the server, so that the server is reduced according to the requirement. The step size of the congestion window value adjusts the congestion window value; when the data buffer amount is less than the second threshold value, the adjustment unit 420 sends the step size of the congestion window value that needs to be increased to the server, so that the server The congestion window value is adjusted according to the step size of the congestion window value that needs to be increased.

According to an embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit 420 sends the reduced congestion window value to the server; when the data buffer amount is less than the second threshold The adjusting unit 420 sends the increased congestion window value to the server.

According to an embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit 420 directly reduces the congestion window value or decreases the congestion window value according to the reduced congestion window ratio; When the second threshold is less than the second threshold, the adjusting unit 420 directly increases the congestion window value or increases the congestion window value according to the increased congestion window ratio. According to an embodiment of the present invention, when the data buffer amount is greater than the first threshold, the adjusting unit

420: Send an indication that the congestion window value is decreased to the server, so that the server decreases the congestion window value according to the indication; when the data buffer amount is less than the second threshold, the adjusting unit 420 sends the congestion window value to increase. The large indication is given to the server, causing the server to increase the congestion window value according to the indication.

For the WCDMA system, the device 400 of the embodiment of the present invention may be a base station control device RNC, or any other node between the server and the UE, such as a TCP function enhancement entity. For the LTE system, the device 400 may be an evolved base station eNodeB, and for the GSM system, the device 400 may also be a base station controller BSC.

FIG. 5 is a schematic structural diagram of another data transmission control device 400 according to an embodiment of the present invention. As shown in FIG. 5, the device 500 includes: a first obtaining unit 510, configured to acquire a loopback delay between a throughput rate and a transmission control protocol TCP sending end to a TCP receiving end; and a first adjusting unit 520, configured to The product of the throughput rate and the loopback delay is converted into the number of bytes, and the converted number of bytes is used as the congestion window estimation value, so that the server uses the product of the proportional coefficient and the congestion window estimation value as the adjustment congestion window. The value causes the transmission link to transmit data according to the adjusted congestion window value. According to the embodiment of the present invention, after the first adjusting unit 520 uses the converted number of bytes as the congestion window estimation value, the first adjusting unit 520 sends a notification message for modifying the congestion window to the server, where the notification message is sent. Carrying the congestion window estimate.

According to an embodiment of the present invention, after the adjusting unit 520 uses the converted number of bytes as the congestion window estimation value, the acquiring unit 510 acquires a product of the scaling coefficient and the congestion window estimation value, and uses the product as The adjusted congestion window value, the first adjusting unit 520 sends the adjusted congestion window value to the server.

It should be noted that the implementation manner and interaction process of each unit in the data transmission control device of the embodiment of the present invention may be further referred to the related description in the method embodiment. FIG. 6 is a schematic structural diagram of a server device 600 according to an embodiment of the present invention. As shown in FIG. 6, the server device 600 includes:

The receiving unit 610 is configured to receive a message that is sent by the intermediate node to control a size of the congestion window value.

The second adjusting unit 620 is configured to adjust a congestion window value according to the message of the size of the control adjustment window value, so that the transmission link performs data transmission according to the adjusted congestion window value;

According to the embodiment of the present invention, in the case that the message for adjusting the size of the congestion window value is determined according to the relationship between the data buffer amount and the preset threshold size,

When the data buffer amount is greater than the first threshold, the receiving unit 610 receives the reduced congestion window ratio, and the second adjusting unit 620 adjusts the congestion window value according to the reduced congestion window ratio. When the data buffer amount is less than the second threshold, the receiving unit 610 receives the increased congestion window ratio, and the second adjusting unit 620 adjusts the congestion window value according to the increased congestion window ratio.

When the data buffer amount is greater than the first threshold, the receiving unit 610 receives the step size of the congestion window ratio that needs to be reduced, and the second adjusting unit 620 adjusts the step size of the congestion window ratio according to the need to decrease. Congesting the window ratio, and adjusting the congestion window value according to the adjusted congestion window ratio; when the data buffer amount is less than the second threshold, the receiving unit 610 receives the step size of the congestion window ratio that needs to be increased, The second adjusting unit 620 adjusts the congestion window ratio according to the step size of the congestion window ratio that needs to be increased, and adjusts the congestion window value according to the adjusted congestion window ratio. According to the embodiment of the present invention, in the case that the message for adjusting the size of the congestion window value is determined according to the relationship between the data buffer amount and the preset threshold size,

When the data buffer amount is greater than the first threshold, the receiving unit 610 receives the step size of the congestion window value that needs to be reduced, and the second adjusting unit 620 is configured according to the step of reducing the congestion window value. Long adjusting the congestion window value; when the data buffer amount is less than the second threshold, the receiving unit 610 receives the step size of the congestion window value that needs to be increased, and the second adjusting unit 620 increases according to the requirement. The step size of the congestion window value adjusts the congestion window value.

When the data buffer amount is greater than the first threshold, the receiving unit 610 receives the reduced congestion window value, and the second adjusting unit 620 reduces the congestion window value according to the reduced congestion window value. When the data buffer amount is less than the second threshold, the receiving unit 610 receives the increased congestion window value, and the second adjusting unit 620 increases the congestion window value according to the increased congestion window value. .

When the data buffer amount is greater than the first threshold, the receiving unit 610 receives an indication that the congestion window value is decreased, and the second adjusting unit 620 decreases the congestion window value according to the indication that the congestion window value is decreased. When the data buffer amount is less than the second threshold, the receiving unit 610 receives an indication that the congestion window value is increased, and the second adjusting unit 620 increases the congestion window according to the indication that the congestion window value is increased. value.

As described above, in the embodiment of the present invention, the second threshold is less than or equal to the first threshold.

According to the embodiment of the present invention, the message for adjusting the size of the congestion window value is obtained by converting the product of the throughput rate and the loopback delay between the TCP transmission end of the transmission control protocol and the TCP receiving end into bytes. In the case where the estimated congestion window is determined, The receiving unit 610 receives a notification message for modifying a congestion window, where the notification message carries the congestion window estimation value, and the second adjustment unit 620 uses the product of the proportional coefficient and the congestion window estimation value as the adjusted congestion window. Value; or,

The receiving unit 610 receives the adjusted congestion window value, wherein the adjusted congestion window value is determined by the intermediate node according to a product of the scaling factor and the congestion window estimation value.

It should be noted that the implementation manners and interaction processes of the various units in the server device of the embodiment of the present invention may be further referred to the related description in the method embodiments.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

While some embodiments of the present invention have been shown and described, it will be understood by those skilled in the art It is within the scope of the invention.

Claims

Rights request

A data transmission control method, the method comprising:

Obtaining the data buffer amount through the cache of the intermediate node;

2. The method according to claim 1, wherein the obtaining the data buffer amount by the buffer of the intermediate node comprises:

Obtaining the data buffer amount by acquiring a size of the radio link control RLC layer buffer; or acquiring the data buffer amount by acquiring a size of the packet data convergence protocol PDCP layer buffer.

3. The method according to claim 1, wherein the data buffer amount is a data buffer amount or a normalized data buffer amount directly read from the intermediate node; wherein, the method is as follows The amount of data cache is normalized:

The ratio of the amount of data buffer directly read from the intermediate node divided by the throughput rate is used as the normalized data buffer amount.

The method according to claim 1 or 3, wherein the intermediate node controls to adjust the size of the congestion window value according to the size relationship between the data buffer amount and the preset threshold, including: When the threshold value is greater than the first threshold, the reduced congestion window ratio is sent to the server, so that the server adjusts the congestion window value according to the reduced congestion window ratio; or

When the data buffer amount is greater than the first threshold, sending a step size of the reduced congestion window ratio to the server, so that the server adjusts the congestion window ratio according to the step size of the required congestion window ratio Adjusting a congestion window value according to the adjusted congestion window ratio; or, when the data buffer amount is greater than the first threshold, sending a step size of the reduced congestion window value to the server, so that the server is configured according to the The step size of the congestion window value to be reduced is adjusted to the congestion window value; or, Sending the reduced congestion window value to the server when the data buffer amount is greater than the first threshold; or

When the data buffer amount is greater than the first threshold, the intermediate node directly reduces the congestion window value or decreases the congestion window value according to the reduced congestion window ratio;

Alternatively, when the data buffer amount is greater than the first threshold, the intermediate node sends an indication that the congestion window value is decreased to the server, so that the server reduces the congestion window value according to the indication.

The method according to claim 4, wherein before the sending the reduced congestion window ratio to the server, the method further comprises:

Comparing the current congestion window modification ratio minus the reduction ratio of the congestion window to be reduced to a preset lower limit value, and taking a larger value between the difference value and the lower limit value as the reduced value Congestion window modification ratio.

The method according to claim 1 or 3, wherein the controlling the size of the congestion window value according to the size relationship between the data buffer amount and the preset threshold comprises:

When the data buffer amount is less than the second threshold, the increased congestion window ratio is sent to the server, so that the server adjusts the congestion window value according to the increased congestion window ratio; or

When the data buffer amount is less than the second threshold, the step size of the increased congestion window ratio is sent to the server, so that the server adjusts the congestion window ratio according to the step size of the congestion window ratio that needs to be increased. And adjusting the congestion window value according to the adjusted congestion window ratio; or

When the data buffer amount is less than the second threshold, the step size of the increased congestion window value is sent to the server, so that the server adjusts the congestion window value according to the step size of the congestion window value that needs to be increased. Or,

Sending the increased congestion window value to the server when the data buffer amount is less than the second threshold; or When the data buffer amount is less than the second threshold, the intermediate node directly increases the congestion window value or increases the congestion window value according to the increased congestion window ratio;

Or, when the data buffer quantity is less than the second threshold, the intermediate node sends an indication that the congestion window value is increased to the server, so that the server increases the congestion window value according to the indication;

The second threshold is less than or equal to the first threshold.

7. The method according to claim 6, wherein the transmitting the increased congestion window ratio to the server comprises:

Comparing the current congestion window modification ratio with the congestion ratio of the congestion window to be increased, and comparing the sum value with the preset upper limit value, taking a smaller value between the sum value and the upper limit value as the increased value Congestion window modification ratio.

A data transmission control method, the method comprising:

9. The method of claim 8 wherein:

After the converted number of bytes is used as the congestion window estimation value, the method includes:

Sending, to the server, a notification message for modifying a congestion window, where the notification message carries the congestion window estimation value;

Or,

Obtaining a product of the scale factor and the congestion window estimation value, and using the product as an adjusted congestion window value, sending the adjusted congestion window value to the server.

A data transmission control method, the method comprising:

The method according to claim 10, wherein when the message for controlling the size of the congestion window value is determined according to the size relationship between the data buffer amount and the preset threshold,

The adjusting the congestion window value according to the message of the size of the control adjustment window value includes: receiving, when the data buffer amount is greater than the first threshold, receiving a reduced congestion window ratio, according to the reduced congestion The window scale adjusts the congestion window value; or,

When the data buffer amount is greater than the first threshold, receiving a step size of the congestion window ratio that needs to be reduced, adjusting a congestion window ratio according to a step size of the required congestion window ratio, and according to the adjusted congestion window ratio Adjust the congestion window value; or,

When the data buffer amount is greater than the first threshold, receiving a step size of the congestion window value that needs to be reduced, adjusting a congestion window value according to the step size of the congestion window value that needs to be reduced; or, in the data When the buffer amount is greater than the first threshold, the reduced congestion window value is received, and the congestion window value is decreased according to the reduced congestion window value; or

When the data buffer amount is greater than the first threshold, the message for controlling the size of the congestion window value includes an indication of reducing a congestion window value, and reducing a congestion window according to the indication that the congestion window value is decreased. value.

The method according to claim 10 or 11, wherein when the message for controlling the size of the congestion window value is determined according to the size relationship between the data buffer amount and the preset threshold, The adjusting the congestion window value according to the message of the size of the control adjustment window value includes: when the data buffer amount is less than the second threshold, receiving an increased congestion window ratio, according to the increased congestion The window scale adjusts the congestion window value; or,

When the data buffer amount is less than the second threshold, the step size of the congestion window ratio that needs to be increased is received, and the congestion window ratio is adjusted according to the step size of the congestion window ratio that needs to be increased, and according to the adjusted congestion window ratio Adjust the congestion window value; or,

When the data buffer amount is less than the second threshold, receiving a step size of the congestion window value that needs to be increased, adjusting a congestion window value according to the step size of the congestion window value that needs to be increased; or, in the data When the buffer volume is less than the second threshold, the increased congestion window value is received, and the congestion window value is increased according to the increased congestion window value; or

When the data buffer amount is less than the second threshold, the message for controlling the size of the congestion window value includes an indication of increasing a congestion window value, and increasing a congestion window according to the indication that the congestion window value is increased. Value

The second threshold value is less than or equal to the first threshold value.

13. The method according to claim 10, wherein when the control adjusts the size of the congestion window value, the message is based on a loopback delay between the TCP transmission end and the TCP receiving end of the transmission control protocol. When the congestion window estimation value obtained by converting the product into the number of bytes is determined, the adjusting the congestion window value according to the size of the control adjustment window value includes: receiving a notification message for modifying a congestion window, where the notification message carries Deriving a congestion window estimation value, and using a product of a proportional coefficient and the congestion window estimation value as an adjusted congestion window value; or

An adjusted congestion window value is received, wherein the adjusted congestion window value is determined by the intermediate node based on a product of a scaling factor and the congestion window estimate.

A data transmission control device, the device comprising:

An adjusting unit, configured to control a tone according to a size relationship between the data buffer amount and a preset threshold The size of the entire congestion window value causes the transmission link to perform data transmission according to the adjusted congestion window value.

15. Apparatus according to claim 14 wherein:

The acquiring unit acquires the data buffer amount by acquiring a size of a radio link control RLC layer buffer; or

The acquiring unit acquires the data buffer amount by acquiring a size of a packet data convergence protocol PDCP layer buffer.

16. The device according to claim 14, wherein the data buffer amount is a data buffer amount or a normalized data buffer amount directly read from the intermediate node;

The obtaining unit further includes: a normalization sub-unit, configured to divide the data buffer amount directly read from the intermediate node by the ratio obtained by the throughput rate as a normalized data buffer amount.

17. Apparatus according to claim 14 or claim 16 wherein:

When the data buffer quantity is greater than the first threshold, the adjusting unit sends the reduced congestion window ratio to the server, so that the server adjusts the congestion window value according to the reduced congestion window ratio; Or,

When the data buffer amount is greater than the first threshold, the adjusting unit sends the step size of the required congestion window ratio to the server, so that the server adjusts the step size of the congestion window ratio according to the need to decrease Congest the window ratio and adjust the congestion window value according to the adjusted congestion window ratio; or

When the data buffer amount is greater than the first threshold, the adjusting unit sends a step size of the congestion window value that needs to be reduced to the server, so that the server reduces the step size of the congestion window according to the requirement. Adjust the congestion window value; or,

When the data buffer amount is greater than the first threshold, the adjusting unit sends the reduced congestion window value to the server; or

When the data buffer amount is greater than the first threshold, the adjusting unit directly reduces the congestion window value or decreases the congestion window value according to the reduced congestion window ratio; Or, when the data buffer amount is greater than the first threshold, the adjusting unit sends an indication that the congestion window value is decreased to the server, so that the server decreases the congestion window value according to the indication.

The device according to claim 17, wherein the adjusting unit further comprises a first comparing subunit, wherein the first comparing subunit is configured to send the reduced congestion window ratio in the adjusting unit Before giving the server, compare the current congestion window modification ratio minus the reduction ratio of the congestion window to be reduced to the preset lower limit value, and take a larger value between the difference value and the lower limit value. Reduce the congestion window modification ratio.

19. Apparatus according to claim 14 or claim 17 wherein:

When the data buffer amount is less than the second threshold, the adjusting unit sends the increased congestion window ratio to the server, so that the server adjusts the congestion window value according to the increased congestion window ratio; Or,

When the data buffer amount is less than the second threshold, the adjusting unit sends a step size of the congestion window ratio that needs to be increased to the server, so that the server adjusts the step size of the congestion window ratio according to the requirement. Congest the window ratio and adjust the congestion window value according to the adjusted congestion window ratio; or

When the data buffer amount is less than the second threshold, the adjusting unit sends the step size of the congestion window value that needs to be increased to the server, so that the server increases the step size of the congestion window according to the requirement. Adjust the congestion window value; or,

When the data buffer amount is less than the second threshold, the adjusting unit sends the increased congestion window value to the server; or

When the data buffer quantity is less than the second threshold, the adjusting unit directly increases the congestion window value or increases the congestion window value according to the increased congestion window ratio;

Or, when the data buffer quantity is less than the second threshold, the intermediate node sends an indication that the congestion window value is increased to the server, so that the server increases the congestion window value according to the indication; The second threshold is less than or equal to the first threshold.

20. Apparatus according to claim 19, wherein

The adjusting unit further includes a second comparing subunit, where the second comparing subunit is configured to increase the current congestion window modification ratio to be increased before the adjusting unit sends the increased congestion window ratio to the server. The sum value obtained by modifying the congestion window is compared with a preset upper limit value, and a smaller value is taken between the sum value and the upper limit value as the modified congestion window modification ratio.

The device according to any one of claims 14 to 20, wherein the device is a radio network controller or an evolved base station or a base station controller.

22. A data transmission control device, the device comprising:

a first acquiring unit, configured to acquire a loopback delay between a throughput rate and a transmission control protocol from a TCP sending end to a TCP receiving end;

a first adjusting unit, configured to convert a product of the throughput rate and the loopback delay into a number of bytes, and use the converted number of bytes as a congestion window estimation value, so that the server uses the proportional coefficient and the congestion The product of the window estimate is used as the adjusted congestion window value so that the transmission link performs data transmission according to the adjusted congestion window value.

The device according to claim 22, wherein, after the first adjusting unit uses the converted number of bytes as a congestion window estimation value, the first adjusting unit sends a modified congestion window to the server. a notification message, where the notification message carries the congestion window estimation value; or

After the first adjustment unit uses the converted number of bytes as the congestion window estimation value, the first acquiring unit acquires a product of the proportional coefficient and the congestion window estimation value, and uses the product as the adjusted congestion. a window value, the first adjusting unit sending the adjusted congestion window value to the server.

24. A server device, wherein the server device comprises:

a receiving unit, configured to receive a control sent by the intermediate node to adjust the size of the congestion window value a second adjusting unit, configured to adjust a congestion window value according to the message that controls the size of the window value, so that the transmission link performs data transmission according to the adjusted congestion window value;

25. Apparatus according to claim 24, wherein

When the message for controlling the size of the congestion window value is determined according to the relationship between the amount of data buffer and the preset threshold,

When the data buffer amount is greater than the first threshold, the receiving unit receives the reduced congestion window ratio, and the second adjusting unit adjusts the congestion window value according to the reduced congestion window ratio; or

When the data buffer amount is greater than the first threshold, the receiving unit receives a step size of a congestion window ratio that needs to be reduced, and the second adjustment unit adjusts a congestion window according to a step size of a congestion window ratio that needs to be reduced. Proportion, and adjust the congestion window value according to the adjusted congestion window ratio; or

When the data buffer amount is greater than the first threshold, the receiving unit receives a step size of the congestion window value that needs to be reduced, and the second adjustment unit adjusts according to the step size of the congestion window value that needs to be reduced. Congestion window value; or,

When the data buffer amount is greater than the first threshold, the receiving unit receives the reduced congestion window value, and the second adjusting unit decreases the congestion window value according to the reduced congestion window value; or

When the data buffer amount is greater than the first threshold, the receiving unit receives an indication that the congestion window value is decreased, and the second adjustment unit decreases the congestion window value according to the indication that the congestion window value is decreased. .

26. Apparatus according to claim 24 or claim 25 wherein: When the message for controlling the size of the congestion window value is determined according to the relationship between the data buffer amount and the preset threshold,

When the data buffer amount is less than the second threshold, the receiving unit receives the increased congestion window ratio, and the second adjusting unit adjusts the congestion window value according to the increased congestion window ratio; or

When the data buffer amount is less than the second threshold, the receiving unit receives a step size of the congestion window ratio that needs to be increased, and the second adjustment unit adjusts the congestion window according to the step size of the congestion window ratio that needs to be increased. Proportion, and adjust the congestion window value according to the adjusted congestion window ratio; or

When the data buffer amount is less than the second threshold, the receiving unit receives a step size of the congestion window value that needs to be increased, and the second adjustment unit adjusts according to the step size of the congestion window value that needs to be increased. Congestion window value; or,

When the data buffer amount is less than the second threshold, the receiving unit receives the increased congestion window value, and the second adjusting unit increases the congestion window value according to the increased congestion window value; or

When the data buffer amount is less than the second threshold, the receiving unit receives an indication that the congestion window value is increased, and the second adjusting unit increases the congestion window value according to the indication that the congestion window value is increased.

The second threshold value is less than or equal to the first threshold value.

27. Apparatus according to claim 24, wherein

When the message for controlling the size of the congestion window value is determined according to the congestion window estimation value obtained by converting the product of the throughput rate from the loopback delay between the TCP transmission end to the TCP receiving end of the transmission control protocol into the number of bytes. Time,

The receiving unit receives a notification message for modifying a congestion window, where the notification message carries the congestion window estimation value, and the second adjustment unit uses the product of the proportional coefficient and the congestion window estimation value as the adjusted congestion window value; or, The receiving unit receives the adjusted congestion window value, wherein the adjusted congestion window value is determined by the intermediate node according to a product of a proportional coefficient and the congestion window estimation value.