CN113055302A - Transmission Control Protocol (TCP) data transmission method and device and electronic equipment - Google Patents
Transmission Control Protocol (TCP) data transmission method and device and electronic equipment Download PDFInfo
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- CN113055302A CN113055302A CN202110237758.7A CN202110237758A CN113055302A CN 113055302 A CN113055302 A CN 113055302A CN 202110237758 A CN202110237758 A CN 202110237758A CN 113055302 A CN113055302 A CN 113055302A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0888—Throughput
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
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Abstract
The invention provides a transmission method and device of TCP data and electronic equipment. The method comprises the following steps: after TCP data of a transmission control protocol are received, selecting an RLC entity for transmitting the TCP data according to Round Trip Time (RTT) statistic of the TCP data borne by each Radio Link Control (RLC) entity, throughput rate statistic of each RLC entity and cached data quantity; transmitting the TCP data to the selected RLC entity, and updating the cached data amount on the RLC entity; after the RLC entity finishes TCP data transmission, updating the cached data quantity on the RLC entity, and periodically updating a throughput rate statistic value corresponding to the RLC entity; and updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity. The invention can improve the overall throughput rate of the sending end.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to a method and an apparatus for transmitting TCP data, and an electronic device.
Background
With the proliferation of mobile communication device usage, there is growing interest in mobile internet and Web-based applications. TCP (Transmission Control Protocol) is a popular transport layer Protocol on the internet and is responsible for providing high-reliability data Transmission of wired and wireless links. Because the ideal value of the TCP transmission throughput rate is limited by the ratio of the transmission window size to the RTT (Round-Trip Time), the overall throughput rate of the transmitting end is reduced by the RTT increase caused by various reasons (e.g., packet loss, retransmission, link resource scheduling delay, etc.) on the premise that the transmission window size is not changed.
The introduction of the dual connection aims to bring higher data transceiving rate to users, and a data sending end distributes TCP data on a separated bearer of the dual connection so as to improve the throughput rate of the TCP data sending. Since each RLC (Radio Link Control) entity is separately loaded to connect to different transmission paths, TCP data loaded by the RLC entity often has different RTT values. Generally, before a certain packet of TCP data reaches a split bearer, the sending end evaluates on which specific RLC entity the packet should be selected to be sent according to the throughput rate of the RLC entity in the latest time period, that is, selects an RLC entity capable of providing a sending opportunity as soon as possible. However, sending as soon as possible is not equal to receiving an acknowledgement from the peer as soon as possible. After the TCP data is distributed to the separate bearer in sequence and sent, the RLC entity corresponding to the smaller RTT value (the TCP data carried by the RLC entity has the smaller RTT value) can receive the TCP ACK (TCP send acknowledgement) first. As time goes on, the sending end needs to wait for the RLC entity corresponding to the larger RTT value to receive the TCP ACK before sending new data. Thus, the overall throughput rate of the transmitting end is limited to a lower level.
Disclosure of Invention
The transmission method, the transmission device and the electronic equipment of the TCP data can improve the overall throughput rate of the sending end.
In a first aspect, the present invention provides a method for transmitting TCP data, where the method includes:
after TCP data are received, selecting an RLC entity for transmitting the TCP data according to the RTT statistic value of the TCP data borne by each RLC entity, the throughput rate statistic value of each RLC entity and the cached data amount;
transmitting the TCP data to the selected RLC entity, and updating the cached data amount on the RLC entity;
after the RLC entity finishes TCP data transmission, updating the cached data quantity on the RLC entity, and periodically updating a throughput rate statistic value corresponding to the RLC entity;
and updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity.
Optionally, the selecting, according to the round trip time RTT statistic of TCP data carried by each RLC entity, the throughput rate statistic of each RLC entity, and the buffered data amount, an RLC entity for transmitting TCP data includes:
selecting RTT and
as the RLC entity for transmitting TCP data, where T is the throughput statistics and V is the amount of buffered data.
Optionally, the selecting, according to the round trip time RTT statistic of TCP data carried by each RLC entity, the throughput rate statistic of each RLC entity, and the buffered data amount, an RLC entity for transmitting TCP data includes:
and selecting the RLC entities for transmitting the TCP data according to the RTT statistic value of the TCP data borne by each RLC entity, the throughput rate statistic value of each RLC entity, the cached data amount and the environment variable.
Optionally, the environment variable comprises a signal strength RSRP and/or a signal to noise ratio SNR;
the selecting the RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, the cached data amount, and the environment variable includes: for two RLC entities, if their corresponding RTTs and RTTs
If the weighted sum of the two is within the preset range, then comparing the corresponding RSRP or SNR, and selecting the RLC entity with larger link RSRP and/or SNR as the RLC entity for transmitting TCP data.
In a second aspect, the present invention provides a TCP data transmission apparatus, including:
a selecting unit, configured to select, after receiving TCP data, an RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, and the cached data amount;
a transfer unit, configured to transfer the TCP data to the selected RLC entity and update a buffered data amount on the RLC entity;
a first updating unit, configured to update a buffered data amount on the RLC entity after the RLC entity completes TCP data transmission, and periodically update a throughput statistic corresponding to the RLC entity;
and the second updating unit is used for updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity.
Optionally, the selecting unit is configured to select the RTT and the RTT
As the RLC entity for transmitting TCP data, where T is the throughput statistics and V is the amount of buffered data.
Optionally, the selecting unit is configured to select an RLC entity for transmitting TCP data according to the RTT statistic of TCP data carried by each RLC entity, the throughput statistic of each RLC entity, the buffered data amount, and an environment variable.
Optionally, the environment variable comprises a signal strength RSRP and/or a signal to noise ratio SNR;
the selection unit is configured to, for two RLC entities, determine corresponding RTTs and RTTs thereof
If the weighted sum of the two is within the preset range, then comparing the corresponding RSRP or SNR, and selecting the RLC entity with larger link RSRP and/or SNR as the RLC entity for transmitting TCP data.
In a third aspect, the present invention provides an electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described TCP data transmission method.
In a fourth aspect, the present invention provides a chip, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described TCP data transmission method.
In a fifth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions, when executed by a processor, implement the above TCP data transmission method.
According to the TCP data transmission method, the TCP data transmission device and the electronic equipment, the RLC entities corresponding to the lower RTT values are preferentially selected, data are distributed to other RLC entities on the premise that the overall RTT value is not increased, the overall RTT value is guaranteed to be as small as possible, and therefore the throughput rate of a sending end is guaranteed to be maintained at a high level.
Drawings
FIG. 1 is a flow chart of a TCP data transmission method according to an embodiment of the invention;
FIG. 2 is a flow chart of a TCP data transmission method according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a TCP data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a transmission method of TCP data, where the method is applied to an electronic device, and as shown in fig. 1, the method includes:
s11, after receiving the TCP data, selecting an RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, and the buffered data amount.
Alternatively, RTT and RTT may be selected
As the RLC entity for transmitting TCP data, where T is the throughput statistics and V is the amount of buffered data.
S12, transferring the TCP data to the selected RLC entity, and updating the buffered data amount on the RLC entity.
S13, after the RLC entity completes the TCP data transmission, updating the buffered data amount on the RLC entity, and periodically updating the throughput rate statistic corresponding to the RLC entity.
S14, updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity.
The TCP data transmission method provided by the embodiment of the invention preferentially selects the RLC entities corresponding to the lower RTT value, distributes data to other RLC entities on the premise of not increasing the whole RTT value, ensures that the total RTT value is as small as possible, and further ensures that the throughput rate of a sending end is maintained at a higher level.
The following describes the transmission method of TCP data according to the present invention in detail with reference to specific embodiments.
As shown in fig. 2, the TCP data transmission method provided in this embodiment includes the following steps:
s21, after the data transmission module receives the TCP data sent by the application processor, according to the RTT value of the TCP data related to each RLC entity, the T value and the V value of the RLC entity provided by the application processor, selecting the RTT and the V value
And smaller RLC entities.
The RTT statistic of TCP data carried by the RLC entity separately is an RTT value, the throughput rate statistic of the RLC entity is a T value, and the amount of data cached on the RLC entity is a V value.
S22, the data transmission module transfers the TCP data to the selected RLC entity and updates the V value.
And S23, after the RLC entity finishes TCP data transmission, updating the V value and periodically updating the statistic value of T corresponding to the RLC entity.
And S24, the application processor calculates and counts RTT values according to TCP ACK messages fed back by each RLC entity, and shares the information to the data transmission module.
In this embodiment, the function of counting RTT values is placed in the application processor to reduce the overhead of additional message parsing, but the function is not limited to be placed only in the application processor.
It should be noted that, the RTT is the loop time, and the V/T is the time of delayed transmission. The embodiment selects RTT and
the weighted sum of the smaller RLC entities, the sum of the RTT and the
When weighted sum is made, RTT sum
The coefficient of (2) is not limited.
In addition, since the RTT, V and T values are all statistical values over a period of time, for better sakeTo evaluate the present and predict future conditions, environmental variables such as RSRP (Reference Signal Receiving Power) and SNR (Signal-to-Noise Ratio) may also be introduced. After introduction, RTT is equal to
The relation of the weighted sum of (d) to RSRP, SNR may be: one quantity is considered first, and the magnitude relation of the other quantity is considered within a certain gap range, so that the comparison relation is determined.
For example, for two RLC entities, if their corresponding RTTs and RTTs are equal
If the weighted sum of the two-way transmission is within a preset range, comparing the corresponding RSRP or SNR, and selecting the RLC entity with larger RSRP and/or SNR of the link as the RLC entity for transmitting TCP data; if two RLC entities, their corresponding RTT and RTT
The corresponding RSRP/SNR is compared when the weighted sum phase difference is within a preset range, and the SNR/RSRP is compared when the weighted sum phase difference is also within the preset range, and the RLC entity with the larger SNR/RSRP of the link is selected as the RLC entity for transmitting the TCP data.
According to the transmission method of the TCP data, by introducing the consideration of RTT, the sending and receiving speeds of the TCP data on different paths are coordinated to be close to the same, the situation that a certain connection blocks the propelling of a TCP sending window due to the fact that a loop is slow is reduced, and the sending throughput rate is kept at a high level.
It should be noted that the number of RLC entities separating bearer connections in the embodiment of the present invention may not necessarily be two, and may also be a case where more than two connections coexist (i.e. a scenario of extending to multiple connections), and meanwhile, the RLC entity concept may also be replaced by other modules with similar functions.
An embodiment of the present invention further provides a device for transmitting TCP data, where the device is located in an electronic device, and as shown in fig. 3, the device includes:
a selecting unit 11, configured to select, after receiving TCP data, an RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, and the cached data amount;
a transfer unit 12, configured to transfer the TCP data to the selected RLC entity, and update a buffered data amount on the RLC entity;
a first updating unit 13, configured to update a buffered data amount on the RLC entity after the RLC entity completes TCP data transmission, and periodically update a throughput statistic corresponding to the RLC entity;
a second updating unit 14, configured to update the RTT statistic according to the TCP ACK packet fed back by the RLC entity.
The TCP data transmission device provided by the embodiment of the invention preferentially selects the RLC entities corresponding to the lower RTT value, distributes data to other RLC entities on the premise of not increasing the whole RTT value, ensures that the total RTT value is as small as possible, and further ensures that the throughput rate of a sending end is maintained at a higher level.
Optionally, the selecting unit 11 is configured to select RTT and RTT
As the RLC entity for transmitting TCP data, where T is the throughput statistics and V is the amount of buffered data.
Optionally, the selecting unit 11 is configured to select an RLC entity for transmitting TCP data according to the RTT statistic of TCP data carried by each RLC entity, the throughput statistic of each RLC entity, the buffered data amount, and an environment variable.
Optionally, the environment variable comprises a signal strength RSRP and/or a signal to noise ratio SNR;
the selecting unit 11 is configured to, for two RLC entities, determine corresponding RTTs and RTTs thereof
If the weighted sum of the two is within the preset range, then comparing the corresponding RSRP or SNR, and selecting the RLC entity with larger link RSRP and/or SNR as the RLC entity for transmitting TCP data.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
An embodiment of the present invention further provides an electronic device, where the electronic device includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described TCP data transmission method.
An embodiment of the present invention further provides a chip, where the chip includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described TCP data transmission method.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions, when executed by a processor, implement the transmission method of the TCP data.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A method for transmitting TCP data, the method comprising:
after TCP data of a transmission control protocol are received, selecting an RLC entity for transmitting the TCP data according to Round Trip Time (RTT) statistic of the TCP data borne by each Radio Link Control (RLC) entity, throughput rate statistic of each RLC entity and cached data quantity;
transmitting the TCP data to the selected RLC entity, and updating the cached data amount on the RLC entity;
after the RLC entity finishes TCP data transmission, updating the cached data quantity on the RLC entity, and periodically updating a throughput rate statistic value corresponding to the RLC entity;
and updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity.
2. The method of claim 1, wherein the selecting the RLC entity for transmitting the TCP data according to the round trip time RTT statistic of the TCP data carried by each RLC entity, the throughput rate statistic of each RLC entity, and the buffered data amount comprises:
selecting the RLC entity with smaller weighted sum of RTT and TV as the RLC entity for transmitting TCP data, wherein T is the throughput rate statistic value and V is the buffered data amount.
3. The method according to claim 1 or 2, wherein the selecting the RLC entity for transmitting the TCP data according to the round trip time RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, and the buffered data amount comprises:
and selecting the RLC entities for transmitting the TCP data according to the RTT statistic value of the TCP data borne by each RLC entity, the throughput rate statistic value of each RLC entity, the cached data amount and the environment variable.
4. The method according to claim 3, wherein the environment variables comprise signal strength RSRP and/or signal-to-noise ratio SNR;
the selecting the RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, the cached data amount, and the environment variable includes:
for two RLC entities, if their corresponding RTTs and RTTs
If the weighted sum of the two is within the preset range, then comparing the corresponding RSRP or SNR, and selecting the RLC entity with larger link RSRP and/or SNR as the RLC entity for transmitting TCP data.
5. An apparatus for transmitting TCP data, the apparatus comprising:
a selecting unit, configured to select, after receiving TCP data, an RLC entity for transmitting the TCP data according to the RTT statistic of the TCP data carried by each RLC entity, the throughput statistic of each RLC entity, and the cached data amount;
a transfer unit, configured to transfer the TCP data to the selected RLC entity and update a buffered data amount on the RLC entity;
a first updating unit, configured to update a buffered data amount on the RLC entity after the RLC entity completes TCP data transmission, and periodically update a throughput statistic corresponding to the RLC entity;
and the second updating unit is used for updating the RTT statistic value according to the TCP ACK message fed back by the RLC entity.
6. The apparatus of claim 5, wherein the selecting unit is configured to select the RTT and the threshold value
As the RLC entity for transmitting TCP data, where T is the throughput statistics and V is the amount of buffered data.
7. The apparatus according to claim 5 or 6, wherein the selecting unit is configured to select the RLC entity for transmitting the TCP data according to RTT statistics of the TCP data carried by each RLC entity, throughput statistics of each RLC entity, buffered data amount, and environment variables.
8. The apparatus according to claim 7, wherein the environment variables comprise signal strength RSRP and/or signal-to-noise ratio SNR;
the selecting unit is used for comparing corresponding RSRP or SNR of the two RLC entities if the difference between corresponding RTTs and the weighted sum of the TV is within a preset range, and selecting the RLC entity with larger link RSRP and/or SNR as the RLC entity for transmitting TCP data.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 4.
10. A chip, wherein the chip comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 4.
11. A computer readable storage medium, wherein the computer readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1 to 4.
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| CN115208866A (en) * | 2022-06-24 | 2022-10-18 | 深圳市瑞云科技有限公司 | Method for transmitting VR data by automatically selecting transmission mode |
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