WO2021128913A1

WO2021128913A1 - Enhancement method of cellular network uplink ecn mechanism, device and medium

Info

Publication number: WO2021128913A1
Application number: PCT/CN2020/111772
Authority: WO
Inventors: 陈晓宇; 韩立锋; 顾祥新
Original assignee: 展讯通信（上海）有限公司
Priority date: 2019-12-24
Filing date: 2020-08-27
Publication date: 2021-07-01
Also published as: CN111065120B; CN111065120A

Abstract

The embodiment of the present invention provides an enhancement method of cellular network uplink ECN mechanism, a device and a medium, wherein the method comprises: a base station detects whether an air interface uplink is in a congestion state in the uplink data transmission of a sending terminal; if the air interface uplink is in the congestion state, the base station sends a notification message to the sending terminal, wherein, the notification message is used for notifying the sending terminal that the air interface uplink is congested, so that the sending terminal adjusts the TCP message sending rate after receiving the notification message sent by the base station. In this way, the sending terminal can adjust the sending rate of the uplink data in time, feedback delay of uplink data transmission of the cellular network is reduced, which is helpful to improve the accuracy of the rate adjustment of the sending terminal and improve the efficiency of data transmission.

Description

Enhanced method, equipment and medium of cellular network uplink ECN mechanism

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on December 24, 2019, the application number is 201911372495.X, and the invention title is "Methods, Equipment and Media for Enhanced Cellular Network Uplink ECN Mechanism". The entire content is incorporated into this application by reference.

Technical field

The present invention relates to the field of control technology, in particular to a method, equipment and medium for enhancing the uplink ECN mechanism of a cellular network.

Background technique

At present, when data is transmitted on the air interface link of a cellular network, the base station can forward the message sent by the sending terminal to the receiving end. When the base station detects that the air interface link is in a congested state, it uses existing mechanisms such as the uplink display congestion notification (Explicit The Congestion Notification (ECN) mechanism sends a message that the air interface link is in a congested state to the receiving end, and the receiving end feeds back the congestion information of the air interface link to the sending terminal.

However, the ECN mechanism is deployed in the base station of the existing cellular network air interface uplink, by notifying the receiving end of the information that the air interface uplink is in a congested state, and then the receiving end feeds back the congestion message to the sending terminal. The feedback delay affects the timeliness of data rate adjustment and causes problems such as poor user experience.

Summary of the invention

The embodiment of the present invention provides a method, equipment and medium for enhancing the ECN mechanism in the uplink of a cellular network, which can improve the accuracy of the rate adjustment of the sending terminal.

In the first aspect, this application provides a method for enhancing the uplink ECN mechanism of a cellular network, which is applied to a base station, and the method includes:

The base station detects whether the air interface uplink between the transmitting terminal and the base station is in a congested state;

If the air interface uplink is in a congested state, sending a notification message to the sending terminal, where the notification message is used to notify the sending terminal that the air interface uplink is congested.

In the second aspect, this application provides another method for enhancing the uplink ECN mechanism of a cellular network, which is applied to a sending terminal, and the method includes:

Receiving a notification message from the base station indicating that the air interface uplink is in a congested state;

The indication information of the congestion status information is sent to the upper layer, and the upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer.

In the third aspect, the present application provides a transmission device with enhanced ECN mechanism on the uplink of a cellular network, which is applied to a base station, and the device includes a processor and a memory;

The memory is used to store programs;

The processor executes the program stored in the memory, and when the program is executed, the processor is configured to execute the following steps:

Detect whether the air interface uplink between the sending terminal and the base station is in a congested state;

In the fourth aspect, this application provides another transmission device with enhanced ECN mechanism for the uplink of a cellular network, which is applied to a base station and includes: a processing module and a communication module,

The processing module is configured to generate the notification message, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station.

The communication module is configured to send the notification message generated by the processing module to the sending terminal.

In a fifth aspect, the present application provides yet another transmission device with enhanced ECN mechanism on the uplink of a cellular network, which is applied to a sending terminal, and the device includes: a processor and a memory;

The memory is used to store programs;

In a sixth aspect, this application provides yet another transmission device with enhanced ECN mechanism for cellular network uplink, which is applied to a sending terminal, and the device includes: a communication module and a processing module,

The communication module is configured to receive the notification message sent by the base station, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station;

The communication module is further configured to send the instruction information generated by the processing module to an upper layer, where the upper layer refers to an IP or TCP layer;

The processing module is configured to generate indication information, where the indication information includes the TCP information contained in the notification message from the base station indicating that the air interface uplink is in a congested state, wherein the TCP information includes a TCP sequence number .

In a seventh aspect, the present application provides a base station, including: a processor and a memory;

The memory is used to store programs;

In an eighth aspect, an embodiment of the present invention provides a terminal, including: a processor and a memory;

The memory is used to store programs;

In a ninth aspect, the present application provides a computer-readable storage medium that stores a computer program, and when the computer program is executed by a processor, it is the same as the cellular network uplink described in the first or second aspect above. An enhanced method of the link ECN mechanism.

In a tenth aspect, the present application provides a computer program product, including instructions, which when run on a computer, cause the computer to execute the enhanced method of the cellular network uplink ECN mechanism as described in the first or second aspect above .

In this application, the base station can detect whether the air interface uplink between the sending terminal and the base station is in a congested state, and if the air interface uplink is in a congested state, it can send a notification message to the sending terminal, where the notification message It is used to notify the sending terminal that the air interface uplink is congested, so that the sending terminal adjusts the TCP packet sending rate after receiving the notification information sent from the base station. Through this implementation manner, the sending terminal can adjust the uplink data sending rate in time, reduce the feedback delay of the uplink data transmission of the cellular network, help improve the accuracy of the sending terminal rate adjustment, and improve the efficiency of data transmission.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a schematic structural diagram of a data transmission system provided by an embodiment of the present invention;

2 is a schematic flowchart of a method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

3 is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

4 is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

5 is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

6 is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a transmission device for a cellular network uplink enhanced ECN mechanism provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another transmission device with enhanced ECN mechanism on the uplink of a cellular network according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of yet another transmission device with enhanced ECN mechanism on the uplink of a cellular network according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of yet another transmission device for the enhanced ECN mechanism of a cellular network uplink provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the following, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

The method for enhancing the uplink ECN mechanism of the cellular network provided in the embodiment of the present invention may be executed by a data transmission system including a base station, a sending terminal, a receiving terminal, a core network, and a router. In some embodiments, the transmitting terminal may establish a communication connection channel with the receiving terminal through the base station. In some embodiments, the communication connection channel may be a transmission control protocol (Transmission Control Protocol) between the transmitting terminal and the base station. Protocol, TCP) established TCP channel; in some embodiments, the communication connection channel may be a UDP channel established by the sending terminal and the base station through the User Datagram Protocol (UDP). In some embodiments, the sending terminal may perform two-way communication with the base station through the communication connection channel. In some embodiments, the receiving terminal and the base station may also establish a TCP channel through a core network and a router or establish a UDP channel through UDP, so that the receiving terminal can conduct a two-way communication connection with the base station to perform Two-way communication. In this way, the sending terminal and the receiving terminal respectively establish a communication connection with the base station, and then realize the communication connection between each other via the base station.

In some embodiments, the sending terminal, base station, and receiving terminal may communicate in a public communication network. In some embodiments, the public communication network may include a public wireless communication network, such as a fourth-generation mobile communication network. (the 4th Generation mobile communication technology, 4G) or fifth-generation mobile communication network (Fifth-Generation, 5G) and other mobile communication networks; of course, in other embodiments, it is not limited to the above-mentioned 4G or 5G mobile communication networks. As long as it is a public wireless communication network. In some embodiments, the sending terminal may be set on a terminal device (such as a mobile phone, a tablet computer, etc.) including a display device (such as a user interface); in some embodiments, the receiving terminal may be set on a terminal device including a display device (such as a user interface); Display devices (such as user interface) on terminal devices (such as mobile phones, tablet computers, etc.). It can be understood that, for the terminal device, if related operations may not be performed through the display device in some application scenarios, the terminal device may not include the display device.

The existing agreement stipulates that the air interface congestion is handled by using the ECN mechanism. When the packet data convergence protocol layer (Packet Data Convergence Protocol, PDCP) protocol data unit (service Data Unit, SDU) carries two ECN-enabled transmissions (Explicit Congestion) Notification Transmission, ECT), such as ECT(0) or ECT(1), and when the air interface uplink between the transmitting terminal and the base station is congested, the base station can set the ECN of the PDCP SDU to experience congestion (Congestion Experienced, CE), and send the congested data packet with the ECN set to the receiving terminal. Through this kind of base station uplink ECN operation, the purpose is to notify the receiving terminal to feed back an acknowledgement signal (Acknowledge Character, ACK) to the transmitting terminal, so as to notify the transmitting terminal that the air interface uplink is congested. However, the uplink ECN sent from the base station to the receiving terminal needs to be forwarded by the core network and router. The sending terminal performs rate adjustment when receiving the ACK feedback from the receiving terminal. There is a long time delay between this, which causes a high feedback delay. In turn, the sending terminal cannot adjust the transmission rate in time, which may cause data packet loss and affect user experience.

In one embodiment, the ECN mechanism can modify the Internet Protocol (IP) header. When modifying the IP header, the 7th bit in the Type of Service (TOS) field can be used. And/or the res field of the 8th bit is redefined as an ECN field.

In one embodiment, the ECN field includes four values: 00 indicates that ECN is not supported; 01 and 10 indicate that ECN is supported; 11 indicates that the message is congested. On the router forwarding side, the functions that need to be implemented to support ECN when congestion occurs are as follows:

1. For the message with ECN=00, follow the original ordinary non-ECN process, that is, overload and packet loss.

2. The message with ECN=01 or ECN=10 needs to be modified to ECN=11, indicating that congestion occurs and the forwarding process is continued.

3. For the message with ECN=11, it needs to continue to be forwarded.

In one embodiment, the ECN mechanism can also modify the TCP header. When modifying the TCP header, the ECN modifies the 8th and 9th bits of the TCP header res field to Congestion Window Reduce (CWR). ) And an explicit congestion notification response (ECN-Echo, ECE), the 7th bit is modified to a random sum (Nonce Sum, NS). The random sum is used for experimental addition, which can prevent accidental or malicious changes to the packet marking.

In one embodiment, when receiving the ECN=11 flag in the IP header, the receiving terminal sets the ECE bit to 1 when replying to the ACK, and sets the ECE bit to 1 in all subsequent ACKs.

In one embodiment, for the sending terminal, when receiving an ACK message with the ECE bit set to 1, the sending rate is adjusted, such as halved, and the CWR bit is set to 1 when sending the next message.

In one embodiment, for the receiving terminal, when receiving a message with the CWR bit set to 1, the subsequent ECE bit will no longer be set to 1, until the IP header ECN=11 is received again, the ECE bit will be set when replying to the ACK. Set to 1, and set the ECE bit to 1 in subsequent ACKs.

The embodiment of the present invention proposes a cellular network uplink ECN mechanism enhancement method that enhances the ECN mechanism. The base station directly feeds back the uplink congestion situation to the transmitting terminal on the air interface link, thereby reducing the uplink feedback delay. Improve the real-time performance of rate adjustment, so that the sending terminal can adjust the rate more timely. The method for enhancing the cellular network uplink ECN mechanism proposed in the embodiment of the present invention also includes a processing mechanism for redundant feedback signals, which further improves the accuracy of the sending terminal's rate adjustment.

In one embodiment, when the base station detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, it may use the Protocol Data Unit (PDU) in the Radio Link Control layer (Radio Link Control, RLC). ) Or the control element (CE) in Media Access Control (MAC) notifies the sending terminal of the air interface uplink congestion, so that the sending terminal can do cross-layer processing and instruct the TCP layer to adjust the sending rate. In some embodiments, the manner of adjusting the sending rate includes, but is not limited to, reducing or increasing the sending rate, which is not specifically limited in the embodiment of the present invention.

In one embodiment, when the base station detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, it can notify the transmitting terminal of the congestion condition of the air interface uplink through RLC control PDU or MAC CE, so that the transmitting terminal It can do cross-layer processing, instruct the TCP layer to adjust the sending rate, and notify the TCP layer to record the TCP sequence numbers that have been sent in the nearest interval but have not yet been confirmed by the receiving terminal. In some embodiments, the interval range includes but is not limited to the time range T or the number range M, which is not specifically limited in the embodiment of the present invention.

In one embodiment, when the base station detects that the air interface uplink between the sending terminal and the base station is in a congested state, it can parse the IP header and TCP header included in the PDCP SDU corresponding to the message in the PDCP layer, and obtain The target TCP header information and the uplink congestion flag are fed back to the sending terminal through a PDCP control PDU or a radio resource control protocol (Radio Resource Control, RRC) message. After receiving the congestion notification from the base station, the sending terminal instructs the congestion notification to the TCP layer, and the TCP layer of the sending terminal records the feedback information and adjusts the sending rate. In some embodiments, the feedback information includes a TCP sequence number and the like.

In one embodiment, the base station directly feeds back the air interface uplink congestion information to the sending terminal, which can reduce the uplink feedback delay, but it will introduce a problem: if the sending terminal subsequently receives the uplink congestion flag fed back by the receiving terminal again, Since the congestion flag corresponding to the uplink of the air interface has actually been directly fed back by the base station to the sending terminal, and the sending terminal has responded and adjusted the sending rate. Therefore, for this redundant uplink congestion flag feedback, the specific processing implementation is as follows.

In one embodiment, when the base station detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, it may not set the ECN bit of the PDCP SDU, so that the subsequent transmitting terminal receives an ACK with ECE set. When the packet is received, it can be processed according to the normal ECN mechanism. Through this implementation manner, it can be avoided that the sending rate is adjusted again when the redundant uplink congestion flag is received, thereby ensuring the accuracy of the sending terminal's adjustment of the sending rate.

In one embodiment, when the base station detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, the ECN bit of the PDCP SDU may be set. If the sending terminal subsequently receives an ACK packet corresponding to the TCP sequence number that has been responded to and the ECE is set, the sending terminal does not adjust the sending rate, and according to the normal ECN mechanism, when sending the next message, the TCP header The CWR bit is set to notify the receiving terminal to stop setting the ECE bit of the subsequent ACK signal. Through this implementation manner, it can be avoided that the sending rate is adjusted again when the redundant uplink congestion flag is received, thereby ensuring the accuracy of the sending terminal's adjustment of the sending rate.

In other embodiments, the embodiment of the present invention may include the foregoing single solution or a combination of certain solutions, and the embodiment of the present invention does not specifically limit the combination of solutions.

Hereinafter, a data transmission system provided by an embodiment of the present invention will be schematically described with reference to FIG. 1.

Please refer to FIG. 1, which is a schematic structural diagram of a data transmission system according to an embodiment of the present invention. The data transmission system includes: a base station 11, a sending terminal 12, a receiving terminal 13, a core network 14 and a router 15. In some embodiments, the sending terminal 12 may establish a communication connection with the receiving terminal 13 through the base station 11. In some embodiments, the receiving terminal 13 and the base station 11 may also establish a communication connection through the core network 14 and the router 15 so that the receiving terminal 13 can perform a two-way communication connection with the base station 11. In this way, the sending terminal 12 and the receiving terminal 13 establish a communication connection with the base station 11 respectively, and then realize the communication connection between each other via the base station 11.

The following schematically illustrates an embodiment of a method for enhancing an uplink ECN mechanism of a cellular network provided by an embodiment of the present invention with reference to the accompanying drawings.

Please refer to Figure 2. Figure 2 is a schematic flowchart of a method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention. The method can be applied to a base station, where the specific explanation of the base station is as described above. . Specifically, the method of the embodiment of the present invention includes the following steps.

S201: Detect whether the air interface uplink between the sending terminal and the base station is in a congested state.

In the embodiment of the present invention, the base station can detect whether the air interface uplink between the sending terminal and the base station is in a congested state.

S202: If the air interface uplink is in a congested state, send a notification message to the sending terminal, where the notification message is used to notify the sending terminal that the air interface uplink is congested.

In the embodiment of the present invention, if the base station detects that the air interface uplink is in a congested state, it may send a notification message to the sending terminal, where the notification message is used to notify the sending terminal of the air interface uplink Congestion occurs, so that the sending terminal adjusts the sending rate of sending the next message. In some embodiments, the adjusting the sending rate includes, but is not limited to, increasing or decreasing the sending rate, which is not specifically limited here.

Through this implementation manner, the sending terminal can adjust the sending rate of the message, and avoid the problem that the sending terminal is still sending messages quickly when the air interface uplink between the sending terminal and the base station is congested, resulting in the loss of part of the message data.

In an embodiment, the base station may determine an adjustment identifier for adjusting the transmission rate according to the congestion situation, and generate a notification message carrying the adjustment identifier, the adjustment identifier being used to instruct the sending terminal to increase or decrease the transmission rate data; in an example, The adjustment indicator is used to instruct the sending terminal to reduce the sending rate by half. Through this implementation manner, the sending terminal can be notified to adjust the specific value of the sending rate, so as to improve the accuracy of the sending terminal in adjusting the sending rate.

In an embodiment, when the base station sends a notification message to the sending terminal, it may send the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or, The control element MAC CE of the media access control layer carrying the uplink congestion flag is sent to the sending terminal as a notification message, where the MAC CE includes the data radio bearer (DRB) or logical channel where the air interface uplink is congested (Logical Channel, LCH) identification information. Through this embodiment, the sending notification can be sent to the sending terminal in a variety of ways, so that the sending terminal can receive the notification message in time.

In one embodiment, the notification message is used to notify the sending terminal to adjust the sending rate through the TCP layer of the Transmission Control Protocol; and/or to notify the sending terminal to record that the sending terminal has sent within a specified interval But the TCP sequence number that has not been confirmed to be received. Through this implementation manner, it is helpful for the sending terminal to determine whether the TCP sequence number of the unconfirmed reception exists in the ACK signal when receiving the ACK signal fed back by the receiving terminal.

In one embodiment, when the base station sends a notification message to the sending terminal, it may send a packet data convergence protocol layer protocol data unit PDCP PDU carrying an uplink congestion flag as a notification message to the sending terminal; wherein, the The PDCP PDU contains the TCP sequence number of the congested data packet.

In an embodiment, when the base station sends a notification message to the sending terminal, it may send a radio resource control RRC message that carries the uplink congestion flag and target TCP header information as a notification message to the sending terminal. Wherein, the notification message also includes identification information of the DRB or LCH that is congested on the air interface uplink.

In an embodiment, the notification message is used to notify the sending terminal to adjust the sending rate through the TCP layer of the Transmission Control Protocol, and is used to notify the sending terminal to record the target TCP header information, and the target TCP header information includes TCP serial number. Through this implementation manner, it is helpful for the sending terminal to determine whether the TCP sequence number of the unconfirmed reception exists in the ACK signal when receiving the ACK signal fed back by the receiving terminal.

In one embodiment, when detecting that the air interface uplink is in a congested state, the base station may set or not set the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer.

In the embodiment of the present invention, the base station can detect whether the air interface uplink between the sending terminal and the base station is in a congested state, and if the air interface uplink is in a congested state, it can send a notification message to the sending terminal, where the The notification message is used to notify the sending terminal that the air interface uplink is congested. In this way, the sending terminal can adjust the uplink data sending rate in time, reduce the feedback delay of the uplink data transmission of the cellular network, help improve the accuracy of the sending terminal's rate adjustment, and improve the efficiency of data transmission.

Please refer to FIG. 3, which is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention, and the method may be executed by a base station. The detailed implementation process of the method for enhancing the uplink ECN mechanism of the cellular network corresponding to the base station in the embodiment of the present invention is schematically described as follows.

S301: Detect whether the air interface uplink between the sending terminal and the base station is in a congested state.

S302: If it is detected that the uplink of the port is in a congested state, the ECN bit of the protocol data unit PDCP SDU of the packet data convergence protocol layer is not set.

In the embodiment of the present invention, when the base station detects that the air interface uplink between the sending terminal and the base station is in a congested state, the ECN bit of the protocol data unit PDCP SDU of the packet data convergence protocol layer may not be set. In some embodiments, the explanation of the ECN mechanism is as described above, and will not be repeated here. Through this implementation manner, it is helpful for the transmitting terminal to determine that the air interface is not in a congested state when subsequently receiving an ACK signal that includes the ECN setting (that is, including the ECE setting), and transmits data according to the normal ECN mechanism.

S303: Send the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or send the control element MAC CE of the media access control layer carrying the uplink congestion flag as a notification The message is sent to the sending terminal.

In the embodiment of the present invention, the base station may send the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or, the media access control layer carrying the uplink congestion flag The control element MAC CE is sent to the sending terminal as a notification message, where the MAC CE includes the identification information of the data radio bearer DRB or LCH that is congested on the air interface uplink.

In one embodiment, the notification message is used to notify the sending terminal of the occurrence of congestion on the air interface uplink, so that the sending terminal can adjust the sending rate of the message through TCP, and after receiving the notification message, after receiving the When the terminal returns an ACK packet containing the ECE setting, it shall be processed according to the ECN mechanism.

In the embodiment of the present invention, the base station does not set the ECN bit of the PDCP SDU when it detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, and uses the RLC control PDU carrying the uplink congestion flag as a notification The message is sent to the sending terminal; or, by sending a notification message carrying MAC CE to the sending terminal, the sending terminal can adjust the uplink data transmission rate in time, reduce the feedback delay of the cellular network uplink data transmission, and help improve the rate adjustment of the sending terminal The accuracy of data transmission improves the efficiency of data transmission.

Please refer to FIG. 4, which is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention, and the method may be executed by a base station. The detailed implementation process of the method for enhancing the uplink ECN mechanism of the cellular network corresponding to the base station in the embodiment of the present invention is schematically described as follows.

S401: Detect whether the air interface uplink between the sending terminal and the base station is in a congested state.

S402: When it is detected that the air interface uplink is in a congested state, set the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer.

In the embodiment of the present invention, when the base station detects that the air interface uplink between the sending terminal and the base station is in a congested state, it can set the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer.

Through this implementation, it is helpful for the sending terminal to stop the sending rate when the ECN set (that is, the ECE set) contained in the ACK signal fed back by the receiving terminal carries the above-mentioned unconfirmed TCP sequence number. Make adjustments to further improve the accuracy of adjusting the sending rate.

In an embodiment, the processing of setting the ECN bit of the PDCP SDU may include processing the ECN bit as a CE; in an example, the processing of processing the ECN bit as a CE may be setting the CE to 1.

S403: Send the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or send the control element MAC CE of the media access control layer carrying the uplink congestion flag as a notification The message is sent to the sending terminal, where the MAC CE contains the identification information of the data radio bearer DRB or LCH that is congested on the air interface uplink

In one embodiment, the notification message is used to notify the sending terminal to adjust the sending rate through the TCP layer of the Transmission Control Protocol; and/or to notify the sending terminal to record that the sending terminal has sent within a specified interval But the TCP sequence number that has not been confirmed to be received.

Through this implementation, the sending terminal can record the TCP sequence number that has been sent but not confirmed to be received in the most recent time through the TCP layer, and adjust the sending rate of the message. When the sending terminal receives the ECE sent by the receiving terminal, it is set. If the ACK packet contains the TCP sequence number recorded by the sending terminal, you can stop adjusting the sending rate through the TCP layer and process it according to the normal ECN mechanism. When sending the next message, The CWR bit of the TCP header is set to notify the receiving terminal to stop setting the ECE bit of the subsequent ACK signal.

In the embodiment of the present invention, when the base station detects that the air interface uplink between the transmitting terminal and the base station is in a congested state, it can set the ECN bit of the PDCP SDU, and use the RLC PDU carrying the uplink congestion flag as the notification message Send to the sending terminal; or send the MAC CE carrying the uplink congestion flag as a notification message to the sending terminal, so that the sending terminal can adjust the sending rate through the TCP layer and record the sending terminal in the specified time range The TCP sequence number that has been sent but has not been confirmed to be received. Through this implementation manner, the sending terminal can adjust the uplink data sending rate in time, reduce the feedback delay of the uplink data transmission of the cellular network, help improve the accuracy of the sending terminal rate adjustment, and improve the efficiency of data transmission.

Please refer to FIG. 5, which is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention, and the method may be executed by a base station. The detailed implementation process of the method for enhancing the uplink ECN mechanism of the cellular network corresponding to the base station in the embodiment of the present invention is schematically described as follows.

S501: Detect whether the air interface uplink between the sending terminal and the base station is in a congested state.

S502: When it is detected that the air interface uplink is in a congested state, set the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer.

In the embodiment of the present invention, when detecting that the air interface uplink is in a congested state, the base station sets the display congestion notification ECN bit of the service data unit PDCP and SDU of the packet data convergence protocol layer.

S503: Send a radio resource control RRC message carrying the uplink congestion flag and target TCP header information as a notification message to the sending terminal.

In the embodiment of the present invention, the base station may send a radio resource control RRC message that carries the uplink congestion flag and target TCP header information to the sending terminal as a notification message, where the notification message also includes the congestion of the air interface uplink. DRB or LCH identification information.

In one embodiment, the notification message is used to notify the sending terminal to record the target TCP header information contained in the notification message through the TCP layer and adjust the sending rate, and the target TCP header information includes a TCP sequence number.

In one embodiment, before sending the radio resource control RRC message carrying the uplink congestion flag and target TCP header information to the sending terminal as a notification message, the base station may report the Internet protocol included in the PDCP SDU corresponding to the message The IP header and the Transmission Control Protocol TCP header are parsed to obtain the target TCP header information, and the uplink congestion flag is obtained, so that the notification message including the uplink congestion flag and the target TCP header information is sent to the sending terminal. Through this implementation mode, it is helpful for the sending terminal to determine whether the ACK packet includes the TCP sequence number recorded by the sending terminal when it subsequently receives the ACK packet with ECE set fed back by the receiving terminal. If the result of the judgment is yes, Then the sending terminal does not adjust the sending rate of the message. When sending the next message, the congestion window of the TCP header is reduced according to the ECN mechanism. In some embodiments, the CWR position is set. The TCP header is used to notify the receiving terminal to stop setting the ECE bit of the ACK packet of the next message; if the judgment result is no, it will respond and process according to the normal ECN mechanism.

In an embodiment, the base station may also send the PDCP control PDU carrying the uplink congestion flag and the target TCP header information as a notification message to the sending terminal.

Through this implementation manner, multiple ways of sending notification messages can be implemented, so that the sending terminal can obtain the notification message that the air interface is in a congested state in time, which helps the sending terminal to adjust the sending rate of the message in time.

In the embodiment of the present invention, when the base station detects that the air interface uplink is in a congested state, it can set the ECN bit of the PDCP SDU, and send the RRC message carrying the target TCP header information and the uplink congestion flag as a notification message. To the sending terminal. Through this implementation manner, the sending terminal can adjust the uplink data sending rate in time, reduce the feedback delay of the uplink data transmission of the cellular network, help improve the accuracy of the sending terminal rate adjustment, and improve the efficiency of data transmission.

Please refer to FIG. 6, which is a schematic flowchart of another method for enhancing the uplink ECN mechanism of a cellular network according to an embodiment of the present invention. The method may be executed by a terminal, and the terminal corresponds to the aforementioned sending terminal. The detailed implementation process of the method for enhancing the uplink ECN mechanism of the cellular network corresponding to the embodiment of the present invention is schematically illustrated as follows.

S601: Receive a notification message from the base station indicating that the air interface uplink is in a congested state.

In the embodiment of the present invention, the sending terminal may receive a notification message from the base station indicating that the air interface uplink is in a congested state.

In some embodiments, the notification message may be a PDCP PDU, RLC PDU, MAC CE, or RRC message. In some embodiments, the MAC CE and RRC messages include the identification information of the DRB or LCH that is congested on the air interface uplink.

S602: Send indication information of congestion state information to an upper layer, where the upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer.

In the embodiment of the present invention, when the sending terminal receives a notification message from the base station indicating that the air interface uplink is in a congested state, it can send the indication information of the congestion state information to the upper layer. The upper layer refers to the Internet Protocol IP layer or transmission control. Protocol TCP layer.

In an embodiment, the indication information sent to the upper layer includes TCP information included in the notification message, where the TCP information includes a TCP sequence number.

In an embodiment, the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets.

In one embodiment, when the receiving terminal that receives the TCP message feeds back an ACK packet containing an acknowledgment signal containing the explicit congestion notification response ECE setting, the sending terminal may respond and process according to the display congestion notification ECN mechanism.

In one embodiment, the indication information sent to the upper layer is used to notify the TCP layer of the sending terminal to record the TCP sequence number that the sending terminal has sent but not confirmed to be received within a specified interval.

In an embodiment, the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets; and/or the instruction information sent to the upper layer is also used to notify the sending The TCP layer of the terminal records the TCP information contained in the indication information. Wherein, the TCP information includes a TCP sequence number.

In one embodiment, when receiving an ACK packet that contains ECE set as a feedback from the receiving terminal, the sending terminal can determine whether the ACK packet contains the TCP sequence number recorded by the TCP layer, and if the judgment result is yes, it can No adjustment is made to the sending rate of TCP packets.

In one embodiment, when sending the next message, the sending terminal reduces the congestion window of the TCP header according to the ECN mechanism, and the CWR bit is set. Wherein, the TCP header after the CWR is set is used to notify the receiving terminal to stop setting the ECE bit of the ACK packet of the next message.

In the embodiment of the present invention, the sending terminal may receive a notification message from the base station indicating that the air interface uplink is in a congested state, and send the indication information of the congestion state information to the upper layer. The upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP Floor. Through this implementation, the sending terminal can directly receive the notification message from the base station indicating that the air interface uplink is in a congested state, so that the sending terminal can adjust the uplink data transmission rate in time, reduce the feedback delay of the cellular network uplink data transmission, and help Improve the accuracy of the rate adjustment of the sending terminal and improve the efficiency of data transmission.

Please refer to FIG. 7, which is a schematic structural diagram of a transmission device for an enhanced ECN mechanism in a cellular network uplink according to an embodiment of the present invention. Specifically, the transmission device of the enhanced ECN mechanism of the cellular network uplink includes: a memory 701, a processor 702, and a data interface 703.

The memory 701 may include a volatile memory (volatile memory); the memory 701 may also include a non-volatile memory (non-volatile memory); the memory 701 may also include a combination of the foregoing types of memories. The processor 702 may be a central processing unit (CPU). The processor 702 may further include a hardware cellular network uplink enhanced ECN mechanism transmission device. The transmission equipment of the hardware cellular network uplink enhanced ECN mechanism may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. Specifically, for example, it may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.

Further, the memory 701 is used to store a program, and when the program is executed, the processor 702 can call the program stored in the memory 701 to perform the following steps:

Further, when the processor 702 sends a notification message to the sending terminal, it is specifically configured to:

Sending the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or,

The control element MAC CE of the media access control layer carrying the uplink congestion flag is sent to the sending terminal as a notification message, where the MAC CE contains the identification information of the data radio bearer DRB or LCH that is congested on the air interface uplink.

Further, the notification message is used to notify the sending terminal to adjust the sending rate through the TCP layer of the Transmission Control Protocol; and/or to notify the sending terminal to record that the sending terminal has sent but has not been sent within a specified interval. Confirm the received TCP sequence number.

The protocol data unit PDCP PDU of the packet data convergence protocol layer carrying the uplink congestion flag is sent to the sending terminal as a notification message; wherein, the PDCP PDU includes the TCP sequence number of the congested data packet.

The radio resource control RRC message carrying the uplink congestion flag and target TCP header information is sent to the sending terminal as a notification message; wherein the notification message also includes identification information of the DRB or LCH that is congested on the air interface uplink.

Further, the notification message is used to notify the sending terminal to adjust the sending rate, and the TCP information contained in the notification message is recorded at the TCP layer.

Further, the processor 702 is further configured to:

When it is detected that the air interface uplink is in a congested state, the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer is set or not processed.

The embodiment of the present invention can check whether the air interface uplink between the sending terminal and the base station is in a congested state. If the air interface uplink is in a congested state, a notification message can be sent to the sending terminal to notify the sending terminal of the air interface uplink The link is congested. In this way, the sending terminal can adjust the uplink data sending rate in time, reduce the feedback delay of the uplink data transmission of the cellular network, help improve the accuracy of the sending terminal's rate adjustment, and improve the efficiency of data transmission.

Please refer to FIG. 8, which is a schematic structural diagram of another transmission device with an enhanced ECN mechanism for the uplink of a cellular network according to an embodiment of the present invention. Specifically, the transmission device of the enhanced ECN mechanism of the cellular network uplink includes: a first processing module 801 and a first communication module 802,

The first processing module 801 is configured to generate the notification message, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station;

The first communication module 802 is configured to send the notification message generated by the processing module 801 to the sending terminal.

Further, the first communication module 802 is specifically configured to:

Further, the first communication module 802 is also used for:

Please refer to FIG. 9, which is a schematic structural diagram of yet another transmission device with an enhanced ECN mechanism on a cellular network uplink according to an embodiment of the present invention. Specifically, the transmission device of the enhanced ECN mechanism of the cellular network uplink includes: a memory 901, a processor 902, and a data interface 903.

The memory 901 may include a volatile memory (volatile memory); the memory 901 may also include a non-volatile memory (non-volatile memory); the memory 901 may also include a combination of the foregoing types of memories. The processor 902 may be a central processing unit (CPU). The processor 902 may further include a hardware cellular network uplink enhanced ECN mechanism transmission device. The transmission equipment of the hardware cellular network uplink enhanced ECN mechanism may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. Specifically, for example, it may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.

Further, the memory 901 is used to store a program, and when the program is executed, the processor 802 can call the program stored in the memory 901 to perform the following steps:

Further, the instruction information sent to the upper layer includes TCP information included in the notification message, wherein the TCP information includes a TCP sequence number.

Further, the notification message may be a PDCP PDU, RLC PDU, MAC CE, or RRC message.

Further, the MAC CE and RRC messages include identification information of the DRB or LCH that is congested on the air interface uplink.

Further, the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets.

Further, the processor 902 is further configured to:

When the receiving terminal that receives the TCP message feeds back an ACK packet containing an acknowledgment signal containing the explicit congestion notification response ECE setting, the response processing is performed according to the ECN mechanism of the display congestion notification.

Further, the processor 902 is further configured to:

The instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to record the TCP sequence number that the sending terminal has sent but has not been confirmed to receive within a specified interval.

Further, the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets; and/or the instruction information sent to the upper layer is also used to notify the TCP of the sending terminal The layer records the TCP information included in the indication information, where the TCP information includes a TCP sequence number.

Further, the processor 902 is further configured to:

When receiving an ACK packet that includes the ECE setting feedback from the receiving terminal, determining whether the ACK packet includes the TCP sequence number recorded by the TCP layer;

If the judgment result is yes, no adjustment is made to the sending rate of TCP packets.

Further, when the next message is sent, the congestion window of the TCP header is reduced according to the ECN mechanism, and the CWR bit is set.

In the embodiment of the present invention, when a notification message indicating that the air interface uplink is in a congested state is received from a base station, the upper layer may send indication information of the congestion state information to the upper layer. The upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer. Through this implementation manner, the sending terminal can directly receive the notification message from the base station indicating that the air interface uplink is in a congested state, so that the sending terminal can adjust the uplink data transmission rate in time, reduce the feedback delay of the cellular network uplink data transmission, and help To improve the accuracy of the rate adjustment of the sending terminal and improve the efficiency of data transmission.

Please refer to FIG. 10, which is a schematic structural diagram of another transmission device with an enhanced ECN mechanism on a cellular network uplink according to an embodiment of the present invention. Specifically, the transmission device of the enhanced ECN mechanism of the cellular network uplink includes: a second communication module 1001 and a second processing module 1002,

The second communication module 1001 is configured to receive the notification message sent by the base station, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station;

The second communication module 1001 is further configured to send the instruction information generated by the processing module to an upper layer, where the upper layer refers to an IP or TCP layer;

The second processing module 1002 is configured to generate indication information, where the indication information includes the TCP information contained in the notification message from the base station indicating that the air interface uplink is in a congested state, where the TCP information includes TCP sequence number.

Further, the second processing module 1002 is also used for:

When the receiving terminal that receives the TCP message feeds back the ACK packet containing the acknowledgment signal containing the explicit congestion notification response ECE setting, the response processing is performed according to the display congestion notification ECN mechanism.

Further, the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to record the TCP sequence number that the sending terminal has sent but has not been confirmed to receive within a specified interval.

Further, the second processing module 1002 is also used for:

In the embodiment of the present invention, when a notification message indicating that the air interface uplink is in a congested state is received from a base station, the upper layer may send indication information of the congestion state information to the upper layer. The upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer. Through this implementation, the sending terminal can directly obtain the notification message sent by the base station, reducing the feedback delay, so that the generating terminal can adjust the sending rate of the message in time, improving the efficiency of data transmission, and helping the sending terminal to adjust the sending rate. Accuracy and efficiency.

An embodiment of the present invention provides a base station, including: a processor and a memory; the memory is used to store a program; the processor executes the program stored in the memory, and when the program is executed, the processor uses To perform the following steps:

Further, when the processor sends a notification message to the sending terminal, it is specifically configured to:

Further, the processor is also used for:

When it is detected that the air interface uplink is in a congested state, the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer is set or not.

An embodiment of the present invention provides a terminal, including: a processor and a memory; the memory is used to store a program; the processor executes the program stored in the memory, and when the program is executed, the processor uses To perform the following steps:

Further, the processor is also used for:

In the embodiment of the present invention, a computer-readable storage medium is also provided. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the cellular network uplink described in the embodiment of the present invention is realized. The method of enhancing the link ECN mechanism will not be repeated here.

The computer-readable storage medium may be an internal storage unit of the device described in any of the foregoing embodiments, such as a hard disk or memory of the device. The computer-readable storage medium may also be an external storage device of the device, such as a plug-in hard disk equipped on the device, a Smart Media Card (SMC), or a Secure Digital (SD) card. , Flash Card, etc. Further, the computer-readable storage medium may also include both an internal storage unit of the device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

In the embodiment of the present invention, a computer program product is also provided, including instructions, which when run on a computer, cause the computer to execute the enhanced method of the cellular network uplink ECN mechanism described in the embodiment of the present invention. This will not be repeated here.

A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing relevant hardware through a computer program. The program can be stored in a computer readable storage medium, and the program can be stored in a computer readable storage medium. During execution, it may include the procedures of the above-mentioned method embodiments. The computer-readable storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM), etc.

The above-disclosed are only some of the embodiments of the present invention, which of course cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

A method for enhancing the uplink ECN mechanism of a cellular network is characterized in that it is applied to a base station, and the method includes:

Detect whether the air interface uplink between the sending terminal and the base station is in a congested state;

If the air interface uplink is in a congested state, sending a notification message to the sending terminal, where the notification message is used to notify the sending terminal that the air interface uplink is congested.
The method according to claim 1, wherein the sending a notification message to the sending terminal comprises:

Sending the control protocol data unit RLC control PDU of the radio link control layer carrying the uplink congestion flag as a notification message to the sending terminal; or,

The control element MAC CE of the media access control layer carrying the uplink congestion flag is sent to the sending terminal as a notification message, where the MAC CE contains the identification information of the data radio bearer DRB or logical channel LCH that is congested on the air interface uplink.
The method of claim 2, wherein:

The notification message is used to notify the sending terminal to adjust the sending rate through the TCP layer of the Transmission Control Protocol; and/or to notify the sending terminal to record the information that the sending terminal has sent within a specified interval but has not been confirmed to receive TCP sequence number.
The method according to claim 1, wherein the sending a notification message to the sending terminal comprises:

The protocol data unit PDCP PDU of the packet data convergence protocol layer carrying the uplink congestion flag is sent to the sending terminal as a notification message; wherein, the PDCP PDU includes the TCP sequence number of the congested data packet.
The method according to claim 1, wherein the sending a notification message to the sending terminal comprises:

The radio resource control RRC message carrying the uplink congestion flag and target TCP header information is sent to the sending terminal as a notification message; wherein the notification message also includes identification information of the DRB or LCH that is congested on the air interface uplink.
The method according to claim 4 or 5, wherein:

The notification message is used to notify the sending terminal to adjust the sending rate, and to record the TCP information contained in the notification message at the TCP layer.
The method according to claim 1, wherein the method further comprises:

When it is detected that the air interface uplink is in a congested state, the display congestion notification ECN bit of the service data unit PDCP SDU of the packet data convergence protocol layer is set or not processed.
A method for enhancing the uplink ECN mechanism of a cellular network is characterized in that it is applied to a sending terminal, and the method includes:

Receiving a notification message from the base station indicating that the air interface uplink is in a congested state;

The indication information of the congestion status information is sent to the upper layer, and the upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer.
The method according to claim 8, wherein the method further comprises:

The instruction information sent to the upper layer includes TCP information included in the notification message, where the TCP information includes a TCP sequence number.
The method according to claim 8, wherein the notification message can be a PDCP PDU, RLC PDU, MAC CE, or RRC message.
The method according to claim 10, wherein the MAC CE and RRC messages contain identification information of the DRB or LCH that is congested on the air interface uplink.
The method according to claim 8, wherein the instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets.
The method according to claim 12, wherein the method further comprises:

When the receiving terminal that receives the TCP message feeds back the ACK packet containing the acknowledgment signal containing the explicit congestion notification response ECE setting, the response processing is performed according to the display congestion notification ECN mechanism.
The method of claim 12, wherein:

The instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to record the TCP sequence number that the sending terminal has sent but has not been confirmed to receive within a specified interval.
The method according to claim 9 or 12, wherein:

The instruction information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of TCP packets; and/or,

The instruction information sent to the upper layer is also used to notify the TCP layer of the sending terminal to record the TCP information included in the instruction information, where the TCP information includes a TCP sequence number.
The method according to claim 14 or 15, wherein the method further comprises:

When receiving an ACK packet that includes the ECE setting feedback from the receiving terminal, determining whether the ACK packet includes the TCP sequence number recorded by the TCP layer;

If the judgment result is yes, no adjustment is made to the sending rate of TCP packets.
The method according to claim 16, wherein the method further comprises:

When the next message is sent, the congestion window of the TCP header is reduced according to the ECN mechanism, and the CWR bit is set.
A cellular network uplink enhanced ECN mechanism transmission device, which is characterized in that it is applied to a base station, and the device includes a processor and a memory,

The memory is used to store programs;

The processor executes the program stored in the memory, and when the program is executed, the processor is configured to execute the following steps:

Detect whether the air interface uplink between the sending terminal and the base station is in a congested state;

If the air interface uplink is in a congested state, sending a notification message to the sending terminal, where the notification message is used to notify the sending terminal that the air interface uplink is congested.
A cellular network uplink enhanced ECN mechanism transmission device, which is characterized in that it is applied to a base station and includes: a first processing module and a first communication module,

The first processing module is configured to generate the notification message, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station;

The first communication module is configured to send the notification message generated by the processing module to the sending terminal.
A transmission device with enhanced ECN mechanism on a cellular network uplink, which is characterized by being applied to a base station and used to implement the method according to any one of claims 1-7.
A cellular network uplink enhanced ECN mechanism transmission device, which is characterized in that it is applied to a sending terminal, and the device includes: a processor and a memory;

The memory is used to store programs;

The processor executes the program stored in the memory, and when the program is executed, the processor is configured to execute the following steps:

Receiving a notification message from the base station indicating that the air interface uplink is in a congested state;

The indication information of the congestion status information is sent to the upper layer, and the upper layer refers to the Internet Protocol IP layer or the Transmission Control Protocol TCP layer.
A cellular network uplink enhanced ECN mechanism transmission device, which is characterized in that it is applied to a sending terminal, and the device includes: a second communication module and a second processing module,

The second communication module is configured to receive the notification message sent by the base station, where the notification message includes congestion status information of the air interface uplink between the sending terminal and the base station;

The second communication module is further configured to send the instruction information generated by the processing module to an upper layer, where the upper layer refers to an IP or TCP layer;

The second processing module is configured to generate indication information, where the indication information includes TCP information contained in the notification message from the base station indicating that the air interface uplink is in a congested state, wherein the TCP information includes TCP serial number.
A transmission device with enhanced ECN mechanism on a cellular network uplink, which is characterized by being applied to a sending terminal and used to implement the method according to any one of claims 8-17.
A computer-readable storage medium storing a computer program, wherein the computer program implements the method according to any one of claims 1 to 17 when the computer program is executed by a processor.
A computer program product, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1-17.