CN111065120A

CN111065120A - Method, device and medium for enhancing cellular network uplink ECN mechanism

Info

Publication number: CN111065120A
Application number: CN201911372495.XA
Authority: CN
Inventors: 陈晓宇; 韩立锋; 顾祥新
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-24
Anticipated expiration: 2039-12-24
Also published as: CN111065120B; WO2021128913A1

Abstract

The embodiment of the invention provides a method, equipment and a storage medium for enhancing an uplink ECN mechanism of a cellular network, wherein the method comprises the following steps: in the uplink data transmission of a sending terminal, a base station detects whether an air interface uplink is in a congestion state; and if the air interface uplink is in a 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 sending rate of the TCP message after receiving the notification message sent by the base station. By the method, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Description

Method, device and medium for enhancing cellular network uplink ECN mechanism

Technical Field

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

Background

At present, when data transmission is performed in an air interface link of a cellular network, a base station may forward a message sent by a sending terminal to a receiving terminal, and when the base station detects that the air interface link is in a Congestion state, an existing mechanism, such as an uplink Congestion Notification (ECN) mechanism, is used to send a message that the air interface link is in the Congestion state to the receiving terminal, and the receiving terminal feeds back Congestion information of the air interface link to the sending terminal.

However, when an ECN mechanism is deployed in a base station of an air interface uplink of an existing cellular network, a high feedback delay occurs in a manner of notifying a receiving end of information that the air interface uplink is in a congestion state and feeding back a congestion message from the receiving end to a sending terminal, so that timeliness of data rate adjustment is affected, and user experience is poor.

Disclosure of Invention

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

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

the base station detects whether an air interface uplink between a sending terminal and the base station is in a congestion state;

and if the air interface uplink is in a congestion state, sending 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.

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

receiving a notification message from a base station indicating that an air interface uplink is in a congestion state;

and sending the indication information of the congestion state information to an upper layer, wherein the upper layer refers to an Internet Protocol (IP) layer or a Transmission Control Protocol (TCP) layer.

In a third aspect, the present application provides a transmission apparatus for an uplink enhanced ECN mechanism in a cellular network, which is applied to a base station, and the apparatus includes: a processor and a memory;

the memory is used for storing programs;

the processor executes the program stored in the memory, and when the program is executed, the processor is used for executing the following steps:

detecting whether an air interface uplink between a sending terminal and a base station is in a congestion state;

In a fourth aspect, the present application provides another transmission apparatus for an uplink enhanced ECN mechanism in a cellular network, which is applied to a base station, and includes: a processing module and a communication module, wherein,

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

And the communication module is used for sending the notification message generated by the processing module to the sending terminal.

In a fifth aspect, the present application provides a transmission apparatus of an uplink enhanced ECN mechanism for a cellular network, which is applied to a sending terminal, and the apparatus includes: a processor and a memory;

the memory is used for storing programs;

In a sixth aspect, the present application provides a transmission apparatus of an uplink enhanced ECN mechanism for a cellular network, which is applied to a sending terminal, and the apparatus includes: a communication module and a processing module, wherein,

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

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

the processing module is configured to generate indication information, where the indication information includes TCP information included in the notification message from the base station indicating that the air interface uplink is in the congestion state, and 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 for storing programs;

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

the memory is used for storing programs;

In a ninth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed by a processor, provides a method for enhancing cellular network uplink ECN mechanism as described in the first or second aspect.

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

In this application, a base station may detect whether an air interface uplink between a sending terminal and the base station is in a congestion state, and if the air interface uplink is in the congestion state, may 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, so that the sending terminal adjusts a sending rate of a TCP packet after receiving the notification message sent by the base station. By the implementation mode, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an enhanced method for an uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating another enhanced method for an uplink ECN mechanism of a cellular network according to an embodiment of the present invention;

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

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

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

fig. 7 is a schematic structural diagram of a transmission device of an uplink enhanced ECN mechanism of a cellular network according to an embodiment of the present invention;

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

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

fig. 10 is a schematic structural diagram of a transmission device of an uplink enhanced ECN mechanism for a cellular network according to another embodiment of the present invention.

Detailed Description

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.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The method for enhancing the cellular network uplink ECN mechanism provided in the embodiment of the present invention may be performed by a data transmission system, where the data transmission system includes a base station, a sending terminal, a receiving terminal, a core network, and a router. In some embodiments, the sending terminal may establish a communication connection channel with the receiving terminal through the base station, and in some embodiments, the communication connection channel may be a Transmission Control Protocol (TCP) channel established by the sending terminal and the base station through TCP; in some embodiments, the communication connection channel may be a User Datagram Protocol (UDP) channel established between the sending terminal and the base station through UDP. In some embodiments, the sending terminal may communicate bi-directionally with the base station over the communication connection channel. In some embodiments, the receiving terminal and the base station may also establish a TCP channel or a UDP channel through a core network and a router, so that the receiving terminal may perform a bidirectional communication connection with the base station for bidirectional communication. In this way, the transmitting terminal and the receiving terminal respectively establish communication connection with the base station, and further realize communication connection with each other through the base station.

In some embodiments, the sending terminal, base station, and receiving terminal may communicate in a public communication network, which may include, in some embodiments, a public wireless communication network, such as a fourth Generation mobile communication network (4G) or a Fifth Generation mobile communication network (5G); of course, in other embodiments, the present invention is not limited to the above-described mobile communication network such as 4G or 5G, and may be any public wireless communication network. In some embodiments, the sending terminal may be disposed on a terminal device (e.g., a mobile phone, a tablet computer, etc.) that includes a display device (e.g., a user interface); in some embodiments, the receiving terminal may be disposed on a terminal device (e.g., a cell phone, a tablet, etc.) that includes a display device (e.g., a user interface). It can be understood that, for the terminal device, if the relevant operation may not be performed through the display device in some application scenarios, the terminal device may not include the display device.

In the existing Protocol, an ECN mechanism is used to process the Congestion of an air interface, and when a Protocol Data Unit (SDU) of a Packet Data Convergence Protocol (PDCP) layer carries one of two ECN-supporting transports (ECT), such as ECT (0) or ECT (1), and an air interface uplink between a sending terminal and a base station is congested, the base station may set the ECN of the PDCP SDU to experience Congestion (CE), and send the Congestion Packet after setting the ECN to a receiving terminal. Through the operation of the base station uplink ECN, the purpose is to notify the receiving terminal to feed back an Acknowledgement (ACK) to the sending terminal, so as to notify the sending terminal that the uplink is congested on the air interface. However, uplink ECN transmission from the base station to the receiving terminal needs to be forwarded through the core network and the router, and the sending terminal performs rate adjustment when receiving ACK feedback from the receiving terminal, which causes a long time delay and a high feedback delay, so that 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 may modify an Internet Protocol (IP) header, and may redefine the ECN field using a res field of a 7 th bit and/or an 8 th bit in a Type of Service (TOS) field when modifying the IP header.

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

1. for the message with ECN being 00, the original common non-ECN flow is carried out, namely overload packet loss is carried out.

2. Messages for ECN 01 or ECN 10 need to be modified to ECN 11, indicating that congestion occurs and continuing the forwarding procedure.

3. For the message with ECN of 11, forwarding needs to be continued.

In one embodiment, the ECN mechanism may further modify the TCP header, and when modifying the TCP header, the ECN modifies res fields of 8 th bit and 9 th bit of the TCP header into Congestion Window Reduction (CWR) and explicit Congestion notification response (ECN-Echo, ECE), and modifies 7 th bit into a random Sum (Nonce Sum, NS) for experimental addition, which may prevent the packet marking from being accidentally or maliciously altered.

In one embodiment, for the receiving terminal, when receiving the ECN-11 flag in the IP header, the ECE bit is set to 1 in the ACK reply, and the ECE bit is set to 1 in each subsequent ACK.

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

In one embodiment, for the receiving terminal, when receiving the message with CWR bit set to 1, the subsequent ECE bit will not be set to 1 again until receiving the IP header ECN again equal to 11, and when replying ACK, the ECE bit will be set to 1, and in the subsequent ACK, the ECE bit will be set to 1.

The embodiment of the invention provides a method for enhancing an ECN mechanism of a cellular network uplink ECN, which is used for enhancing the ECN mechanism. The method for enhancing the cellular network uplink ECN mechanism provided by the embodiment of the invention also comprises a mechanism for processing the redundant feedback signal, thereby further improving the accuracy of the rate adjustment of the sending terminal.

In an embodiment, when detecting that an air interface uplink between a sending terminal and a base station is in a congestion state, a base station may notify the sending terminal of the air interface uplink congestion situation through a Protocol Data Unit (PDU) in a Radio Link Control (RLC) layer or a Control Element (CE) in a Media Access Control (MAC) layer, so that the sending terminal may perform cross-layer processing and instruct a TCP layer to adjust a sending rate. In some embodiments, the manner of adjusting the sending rate includes, but is not limited to, decreasing or increasing the sending rate, and the embodiments of the present invention are not limited in particular.

In an embodiment, when detecting that an air interface uplink between a sending terminal and a base station is in a congestion state, the base station may notify the sending terminal of the congestion condition of the air interface uplink through an RLC control PDU or an MAC CE, so that the sending terminal may perform cross-layer processing, instruct a TCP layer to adjust a sending rate, and notify the TCP layer to record a TCP sequence number that has been sent in a recent interval range but has not been acknowledged to be received by a receiving terminal. In some embodiments, the range of intervals includes, but is not limited to, a time range T or a number range M, and the embodiments of the present invention are not particularly limited.

In an embodiment, when detecting that an air interface uplink between a sending terminal and a base station is in a congestion state, the base station may analyze an IP header and a TCP header included in a PDCP SDU corresponding to a message in a PDCP layer, and feed back target TCP header information and an uplink congestion flag obtained through the analysis to the sending terminal through a PDCP Control PDU or a Radio Resource Control (RRC) message. And after receiving the congestion notification from the base station, the sending terminal indicates 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, or the like.

In one embodiment, the uplink feedback delay may be reduced by directly feeding back the air interface uplink congestion information to the sending terminal by the base station, but one problem may be introduced: if the subsequent sending terminal receives the uplink congestion flag fed back by the receiving terminal again, the congestion flag of the corresponding air interface uplink is actually fed back to the sending terminal by the base station, and the sending terminal responds and adjusts the sending rate. Therefore, specific processing is performed as follows for the redundant uplink congestion flag feedback.

In an embodiment, when the base station detects that an air interface uplink between the sending terminal and the base station is in a congestion state, the base station may not set the ECN bit of the PDCP SDU, so that when a subsequent sending terminal receives an ACK packet with an ECE set, the subsequent sending terminal may respond according to a normal ECN mechanism. By the implementation mode, the sending rate can be prevented from being adjusted again when the redundant uplink congestion marks are received, so that the accuracy of adjusting the sending rate by the sending terminal is ensured.

In an embodiment, when the base station detects that an air interface uplink between the sending terminal and the base station is in a congestion state, the base station may perform setting processing on the ECN bit of the PDCP SDU. If the sending terminal subsequently receives the ACK packet corresponding to the responded TCP serial number and the ECE is set, the sending terminal does not adjust the sending rate, and the CWR position of the TCP header is set when the next message is sent according to a normal ECN mechanism so as to inform the receiving terminal to stop setting the ECE position of the subsequent ACK signal. By the implementation mode, the sending rate can be prevented from being adjusted again when the redundant uplink congestion marks are received, so that the accuracy of adjusting the sending rate by the sending terminal is ensured.

In other embodiments, the embodiments of the present invention may include a single solution or a combination of solutions, and the combination of solutions is not limited in the embodiments of the present invention.

A data transmission system according to an embodiment of the present invention is schematically described below with reference to fig. 1.

Referring to fig. 1, fig. 1 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 transmitting 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 a core network 14 and a router 15, so that the receiving terminal 13 may perform a bidirectional communication connection with the base station 11. In this way, the transmitting terminal 12 and the receiving terminal 13 establish communication connection with the base station 11, respectively, and further realize communication connection with each other via the base station 11.

An embodiment of an enhanced method for an uplink ECN mechanism of a cellular network according to an embodiment of the present invention is schematically described below with reference to the drawings.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for enhancing an uplink ECN mechanism of a cellular network according to an embodiment of the present invention, where the method may be applied to a base station, and a detailed explanation of the base station is as described above. Specifically, the method of the embodiment of the present invention includes the following steps.

S201: detecting whether an air interface uplink between a sending terminal and a base station is in a congestion state.

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

S202: and if the air interface uplink is in a congestion state, sending 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.

In this embodiment of the present invention, if the base station detects that the air interface uplink is in a congestion state, a notification message may be sent to the sending terminal, where the notification message is used to notify the sending terminal that the air interface uplink is congested, so that the sending terminal adjusts a sending rate for sending a next message. In some embodiments, the adjusting the sending rate includes, but is not limited to, increasing or decreasing the sending rate, and is not limited herein.

By the implementation mode, the sending terminal can adjust the sending rate of the message, and the problem that part of message data is lost because the sending terminal still sends the message quickly when the air interface uplink between the sending terminal and the base station is congested is solved.

In an embodiment, a base station may determine an adjustment identifier for adjusting a sending rate according to a congestion condition, and generate a notification message carrying the adjustment identifier, where the adjustment identifier is used to instruct a sending terminal to increase or decrease data of the sending rate; in one example, the adjustment flag is used to instruct the transmitting terminal to halve the transmission rate. By the implementation, the sending terminal can be informed of the specific value for adjusting the sending rate, so that the accuracy of adjusting the sending rate by the sending terminal is improved.

In an embodiment, when the base station sends the notification message to the sending terminal, the base station may send a control protocol data unit, RLC control PDU, of a radio link control layer carrying an uplink congestion flag to the sending terminal as the notification message; or, sending a control element MAC CE of a MAC layer carrying an uplink congestion flag to the sending terminal as a notification message, where the MAC CE includes identification information of a Data Radio Bearer (DRB) or a Logical CHannel (LCH) where an air interface uplink is congested. With this embodiment, the transmission notification can be transmitted to the transmitting terminal in various ways, so that the transmitting 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 a Transmission Control Protocol (TCP) layer; and/or, the TCP sequence number is used for informing the sending terminal to record the TCP sequence number which is sent by the sending terminal in the specified interval range but is not received by the sending terminal. By the embodiment, when receiving the ACK signal fed back by the receiving terminal, the subsequent transmitting terminal is facilitated to judge whether the TCP sequence number which is not received by the receiving terminal exists in the ACK signal.

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

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

In one embodiment, the notification message is used to notify the sending terminal to adjust the sending rate through a transmission control protocol TCP layer, and to notify the sending terminal to record the target TCP header information, where the target TCP header information includes a TCP sequence number. By the embodiment, when receiving the ACK signal fed back by the receiving terminal, the subsequent transmitting terminal is facilitated to judge whether the TCP sequence number which is not received by the receiving terminal exists in the ACK signal.

In an embodiment, when detecting that the air interface uplink is in a congestion state, the base station may perform setting processing or not perform setting processing on an ECN bit for notification of congestion display of a service data unit PDCP SDU of the packet data convergence protocol layer.

In the embodiment of the present invention, a base station may detect whether an air interface uplink between a sending terminal and the base station is in a congestion state, and may send a notification message to the sending terminal if the air interface uplink is in the congestion state, where the notification message is used to notify the sending terminal that the air interface uplink is congested. By the method, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 3, fig. 3 is a flowchart illustrating another method for enhancing the uplink ECN mechanism of the cellular network according to an embodiment of the present invention, where the method may be executed by a base station. The detailed implementation process of the embodiment of the invention for the enhancement method of the cellular network uplink ECN mechanism applied to the base station is schematically illustrated as follows.

S301: detecting whether an air interface uplink between a sending terminal and a base station is in a congestion state.

S302: and if the uplink is detected to be in the congestion state, setting the ECN bit of the protocol data unit PDCP SDU of the packet data convergence protocol layer.

In the embodiment of the invention, when the base station detects that an air interface uplink between the sending terminal and the base station is in a congestion state, the ECN bit of a protocol data unit PDCP SDU of a packet data convergence protocol layer can not be set. In some embodiments, the ECN mechanism is explained as described above and is not described here. By the implementation, when the sending terminal receives the ACK signal containing the ECN set (that is, containing the ECE set) in the following, it is facilitated to determine that the air interface is not in the congestion state, and transmit data according to a normal ECN mechanism.

S303: sending a control protocol data unit (RLC control PDU) of a radio link control layer carrying an uplink congestion mark to the sending terminal as a notification message; or, the control element MAC CE of the MAC layer carrying the uplink congestion flag is sent to the sending terminal as a notification message.

In the embodiment of the invention, a base station can send a control protocol data unit (RLC control PDU) of a radio link control layer carrying an uplink congestion mark to a sending terminal as a notification message; or, sending a control element MAC CE of a MAC layer carrying an uplink congestion flag to the sending terminal as a notification message, where the MAC CE includes identification information of a data radio bearer DRB or LCH in which an air interface uplink is congested.

In an embodiment, the notification message is used to notify the sending terminal that an air interface uplink is congested, so that the sending terminal may adjust a sending rate of a packet through TCP, and after receiving the notification message, when acquiring an ACK packet including an ECE bit returned by the receiving terminal, perform response processing according to an ECN mechanism.

In the embodiment of the invention, when detecting that an air interface uplink between a sending terminal and a base station is in a congestion state, the base station does not set an ECN bit of a PDCP SDU and sends an RLC control PDU carrying an uplink congestion mark to the sending terminal as a notification message; or, the notification message carrying the MAC CE is sent to the sending terminal, so that the sending terminal can adjust the sending rate of the uplink data in time, reduce the feedback delay of the uplink data transmission in the cellular network, and contribute to improving the accuracy of the rate adjustment of the sending terminal and improving the efficiency of data transmission.

Referring to fig. 4, fig. 4 is a flowchart illustrating a method for enhancing an uplink ECN mechanism of a cellular network according to another embodiment of the present invention, where the method may be executed by a base station. The detailed implementation process of the embodiment of the invention for the enhancement method of the cellular network uplink ECN mechanism applied to the base station is schematically illustrated as follows.

S401: detecting whether an air interface uplink between a sending terminal and a base station is in a congestion state.

S402: and when the congestion state of the air interface uplink is detected, setting an ECN (congestion notification indicator) bit of a congestion display notification PDCP SDU (packet data convergence protocol) of a packet data convergence protocol layer.

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

By the implementation, when the ECN setting (that is, the ECE setting) included in the ACK signal fed back by the receiving terminal is received and carries the unacknowledged TCP sequence number, the transmitting terminal stops adjusting the transmission rate, and the accuracy of adjusting the transmission rate is further improved.

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

S403: sending a control protocol data unit (RLC control PDU) of a radio link control layer carrying an uplink congestion mark to the sending terminal as a notification message; or, sending a control element MAC CE of a MAC layer carrying an uplink congestion flag as a notification message to the sending terminal, where the MAC CE includes identification information of a data radio bearer DRB or LCH with an air interface uplink congested

In one embodiment, the notification message is used to notify the sending terminal to adjust the sending rate through a Transmission Control Protocol (TCP) layer; and/or, the TCP sequence number is used for informing the sending terminal to record the TCP sequence number which is sent by the sending terminal in the specified interval range but is not received by the sending terminal.

Through the implementation mode, the sending terminal can record the TCP serial number which is sent but not confirmed to be received in the latest time through the TCP layer and adjust the sending rate of the message, when the sending terminal receives the ACK packet which is sent by the receiving terminal and contains the ECE setting, if the ACK packet contains the TCP serial number recorded by the sending terminal, the sending rate can be stopped being adjusted through the TCP layer and processed according to the normal ECN mechanism, and when the next message is sent, the CWR position of the TCP header is set to inform the receiving terminal to stop setting the ECE position of the subsequent ACK signal.

In the embodiment of the invention, when detecting that an air interface uplink between a sending terminal and a base station is in a congestion state, the base station can set the ECN bit of the PDCP SDU and send the RLC PDU carrying an uplink congestion mark to the sending terminal as a notification message; or, the MAC CE carrying the uplink congestion flag is sent to the sending terminal as a notification message, so that the sending terminal adjusts the sending rate through a TCP layer and records TCP sequence numbers that the sending terminal has sent but has not been confirmed to receive within a specified time range. By the implementation mode, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 5, fig. 5 is a flowchart illustrating a method for enhancing an uplink ECN mechanism of a cellular network according to another embodiment of the present invention, where the method may be executed by a base station. The detailed implementation process of the embodiment of the invention for the enhancement method of the cellular network uplink ECN mechanism applied to the base station is schematically illustrated as follows.

S501: detecting whether an air interface uplink between a sending terminal and a base station is in a congestion state.

S502: and when the congestion state of the air interface uplink is detected, setting an ECN (congestion notification indicator) bit of a congestion display notification PDCP SDU (packet data convergence protocol) of a packet data convergence protocol layer.

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

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

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

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

In an embodiment, before sending a radio resource control RRC message carrying an uplink congestion flag and target TCP header information to the sending terminal as a notification message, the base station may analyze an internet protocol IP header and a transmission control protocol TCP header included in a PDCP SDU corresponding to the packet to obtain target TCP header information, and obtain the uplink congestion flag, so as to send the notification message including the uplink congestion flag and the target TCP header information to the sending terminal. By the implementation mode, when the sending terminal subsequently receives an ACK packet with an ECE position fed back by the receiving terminal, whether the ACK packet comprises a TCP serial number recorded by the sending terminal is judged, if the judgment result is yes, the sending terminal does not adjust the sending rate of the message, when the next message is sent, the congestion window of a TCP header is reduced by the CWR position according to an ECN mechanism, and in some embodiments, the TCP header with the CWR position is used for informing the receiving terminal to stop setting the ECE position of the ACK packet of the next message; and if the judgment result is negative, responding and processing according to a normal ECN mechanism.

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

By the implementation mode, various modes for sending the notification message can be realized, so that the sending terminal can obtain the notification message of which the air interface is in the congestion state in time, and the sending terminal is facilitated to adjust the sending rate of the message in time.

In the embodiment of the invention, when detecting that an air interface uplink is in a congestion state, the base station can perform setting processing on the ECN bit of the PDCP SDU, and send the RRC message carrying the target TCP header information and the uplink congestion mark to the sending terminal as the notification message. By the implementation mode, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 6, fig. 6 is a flowchart illustrating a method for enhancing an uplink ECN mechanism of a cellular network according to another embodiment of the present invention, where the method is executed by a terminal, and the terminal is the same as the sending terminal. The detailed implementation process of the method for enhancing the uplink ECN mechanism of the cellular network applied to the terminal according to the embodiment of the present invention is schematically described as follows.

S601: and receiving a notification message which indicates that an air interface uplink is in a congestion state from the base station.

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

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 identification information of DRBs or LCHs with congested air interface uplink.

S602: and sending the indication information of the congestion state information to an upper layer, wherein the upper layer refers to an Internet Protocol (IP) layer or a Transmission Control Protocol (TCP) layer.

In the embodiment of the present invention, when receiving a notification message indicating that an air interface uplink is in a congestion state from a base station, a sending terminal may send indication information of congestion state information to an upper layer, where the upper layer refers to an internet protocol IP layer or a transmission control protocol TCP layer.

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

In one embodiment, the indication information sent to the upper layer is used to notify the TCP layer of the sending terminal to adjust the sending rate of the TCP packet.

In one embodiment, when the receiving terminal that receives the TCP packet feeds back an ACK packet including an explicit congestion notification response ECE set, the sending terminal may respond to the processing according to the ECN mechanism.

In one embodiment, the indication information sent to the upper layer is used for informing the TCP layer of the sending terminal to record TCP sequence numbers that have been sent by the sending terminal but are not received by the sending terminal in the specified interval range.

In one embodiment, the indication information sent to the upper layer is used for notifying a TCP layer of the sending terminal to adjust a TCP message sending rate; and/or the indication information sent to the upper layer is also used for informing the TCP layer of the sending terminal to record the TCP information contained in the indication information. Wherein the TCP information comprises a TCP sequence number.

In an embodiment, when receiving an ACK packet including an ECE setting fed back by a receiving terminal, a sending terminal may determine whether the ACK packet includes a TCP sequence number recorded by a TCP layer, and if the determination result is yes, the sending rate of the TCP packet may not be adjusted.

In one embodiment, when the sending terminal sends the next message, the congestion window of the TCP header is reduced by the CWR bit according to the ECN mechanism. And the TCP header after the CWR is set is used for informing the receiving terminal to stop setting the ECE position of the ACK packet of the next message.

In the embodiment of the present invention, the sending terminal may receive a notification message indicating that an air interface uplink is in a congestion state from the base station, and send indication information of the congestion state information to an upper layer, where the upper layer refers to an internet protocol IP layer or a transmission control protocol TCP layer. Through the implementation mode, the sending terminal can directly receive the notification message which indicates that the air interface uplink is in the congestion state from the base station, so that the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a transmission device of an uplink enhanced ECN mechanism of a cellular network according to an embodiment of the present invention. Specifically, the transmission device of the cellular network uplink enhanced ECN mechanism includes: memory 701, processor 702, and 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 comprise a combination of memories of the kind described above. The processor 702 may be a Central Processing Unit (CPU). The processor 702 may further include a transmission device for a hardware cellular network uplink enhanced ECN mechanism. The transmission device 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, the programmable logic device may be, for example, a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.

Further, the memory 701 is used for storing a program, and when the program is executed, the processor 702 may call the program stored in the memory 701 to execute the following steps:

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

sending a control protocol data unit (RLC control PDU) of a radio link control layer carrying an uplink congestion mark to the sending terminal as a notification message; alternatively, the first and second electrodes may be,

and sending a control element MAC CE of a media access control layer carrying the uplink congestion mark to the sending terminal as a notification message, wherein the MAC CE contains identification information of a Data Radio Bearer (DRB) or a radio bearer (LCH) of the congestion of an air interface uplink.

Further, the notification message is used to notify the sending terminal to adjust the sending rate through a Transmission Control Protocol (TCP) layer; and/or, the TCP sequence number is used for informing the sending terminal to record the TCP sequence number which is sent by the sending terminal in the specified interval range but is not received by the sending terminal.

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

sending a Radio Resource Control (RRC) message carrying an uplink congestion mark and target TCP header information to the sending terminal as a notification message; wherein, the notification message also contains the identification information of the DRB or LCH with congestion on the air interface uplink.

Further, the notification message is used to notify the sending terminal to adjust the sending rate, and record the TCP information included in the notification message in the TCP layer.

Further, the processor 702 is further configured to:

and when the congestion state of the air interface uplink is detected, setting or not setting ECN (event-triggered network) bits for the congestion display notification of a service data unit PDCP SDU (packet data convergence protocol) of a packet data convergence protocol layer.

The embodiment of the invention can check whether the air interface uplink between the sending terminal and the base station is in the congestion state, and if the air interface uplink is in the congestion state, a notification message can be sent to the sending terminal for notifying the sending terminal that the air interface uplink is congested. By the method, the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a transmission device of an uplink enhanced ECN mechanism for a cellular network according to another embodiment of the present invention. Specifically, the transmission device of the cellular network uplink enhanced ECN mechanism 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 state information of an air interface uplink between the sending terminal and a 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 further configured to:

Referring to fig. 9, fig. 9 is a schematic structural diagram of a transmission apparatus of an uplink enhanced ECN mechanism of a cellular network according to another embodiment of the present invention. Specifically, the transmission device of the cellular network uplink enhanced ECN mechanism includes: memory 901, processor 902, and data interface 903.

The memory 901 may include a volatile memory (volatile memory); memory 901 may also include non-volatile memory (non-volatile memory); the memory 901 may also comprise a combination of the above-mentioned kinds of memories. The processor 902 may be a Central Processing Unit (CPU). The processor 902 may further include a transmission device for a hardware cellular network uplink enhanced ECN mechanism. The transmission device 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, the programmable logic device may be, for example, a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or any combination thereof.

Further, the memory 901 is used for storing programs, and when the programs are executed, the processor 802 may call the programs stored in the memory 901 for performing the following steps:

Further, 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.

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

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

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

Further, the processor 902 is further configured to:

and when receiving an acknowledgement signal ACK packet which is fed back by the receiving terminal of the TCP message and contains an explicit congestion notification response ECE set, responding and processing according to an explicit congestion notification ECN mechanism.

Further, the processor 902 is further configured to:

the indication information sent to the upper layer is used for informing the TCP layer of the sending terminal to record the TCP sequence number which is sent by the sending terminal in the specified interval range but is not confirmed to receive.

Further, the indication information sent to the upper layer is used for notifying a TCP layer of the sending terminal to adjust a TCP message sending rate; and/or the indication information sent to the upper layer is further used for notifying a TCP layer of the sending terminal to record TCP information contained in the indication information, wherein the TCP information contains a TCP sequence number.

Further, the processor 902 is further configured to:

when an ACK packet which is fed back by a receiving terminal and contains ECE (echo cancellation element) setting is received, whether the ACK packet contains a TCP serial number recorded by the TCP layer or not is judged;

if the judgment result is yes, the sending rate of the TCP message is not adjusted.

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

The embodiment of the invention can send the indication information of the congestion state information to the upper layer when receiving the notification message which indicates that the air interface uplink is in the congestion state from the base station, wherein the upper layer refers to an Internet Protocol (IP) layer or a Transmission Control Protocol (TCP) layer. Through the implementation mode, the sending terminal can directly receive the notification message which indicates that the air interface uplink is in the congestion state from the base station, so that the sending terminal can adjust the sending rate of the uplink data in time, the feedback delay of the uplink data transmission of the cellular network is reduced, the accuracy of the rate adjustment of the sending terminal is improved, and the efficiency of the data transmission is improved.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a transmission device of an uplink enhanced ECN mechanism of a cellular network according to another embodiment of the present invention. Specifically, the transmission device of the cellular network uplink enhanced ECN mechanism 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 state information of an air interface uplink between the sending terminal and the base station;

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

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

Further, the second processing module 1002 is further configured to:

Further, the indication information sent to the upper layer is used for notifying the TCP layer of the sending terminal to record the TCP sequence number that the sending terminal has sent but has not confirmed to receive within the specified interval range.

Further, the second processing module 1002 is further configured to:

The embodiment of the invention can send the indication information of the congestion state information to the upper layer when receiving the notification message which indicates that the air interface uplink is in the congestion state from the base station, wherein the upper layer refers to an Internet Protocol (IP) layer or a Transmission Control Protocol (TCP) layer. Through the implementation mode, the sending terminal can directly acquire the notification message sent by the base station, the feedback delay is reduced, the sending terminal can adjust the sending rate of the message in time, the data transmission efficiency is improved, and the accuracy and the efficiency of the sending terminal in adjusting the sending rate are improved.

An embodiment of the present invention provides a base station, including: a processor and a memory; the memory is used for storing programs; the processor executes the program stored in the memory, and when the program is executed, the processor is used for executing the following steps:

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

Further, the processor is further configured to:

An embodiment of the present invention provides a terminal, including: a processor and a memory; the memory is used for storing programs; the processor executes the program stored in the memory, and when the program is executed, the processor is used for executing the following steps:

Further, the processor is further configured to:

In an embodiment of the present invention, a computer-readable storage medium is further provided, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for enhancing an uplink ECN mechanism of a cellular network described in the embodiment of the present invention is implemented, and details are not repeated here.

The computer readable storage medium may be an internal storage unit of the device according to any of the preceding embodiments, for example, a hard disk or a 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, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the apparatus. The computer-readable storage medium is used for storing the computer program and other programs and data required by the apparatus. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.

In an embodiment of the present invention, a computer program product is also provided, which includes instructions, when executed on a computer, causing the computer to execute the method for enhancing the cellular network uplink ECN mechanism described in the embodiment of the present invention, which is not described herein again.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The computer-readable 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 disclosure is intended to be illustrative of only some embodiments of the invention, and is not intended to limit the scope of the invention.

Claims

1. A method for enhancing cellular network uplink ECN mechanism, which is applied to a base station, the method comprises:

2. The method of claim 1, wherein sending a notification message to the sending terminal comprises:

and sending a control element MAC CE of a media access control layer carrying the uplink congestion mark to the sending terminal as a notification message, wherein the MAC CE comprises identification information of a Data Radio Bearer (DRB) or a Logical Channel (LCH) of the uplink congestion of the air interface.

3. The method of claim 2,

the notification message is used for notifying the sending terminal to adjust the sending rate through a Transmission Control Protocol (TCP) layer; and/or, the TCP sequence number is used for informing the sending terminal to record the TCP sequence number which is sent by the sending terminal in the specified interval range but is not received by the sending terminal.

4. The method of claim 1, wherein sending a notification message to the sending terminal comprises:

5. The method of claim 1, wherein the sending a notification message to the sending terminal comprises:

6. The method according to claim 4 or 5,

the notification message is used for notifying the sending terminal to adjust the sending rate and recording TCP information contained in the notification message in a TCP layer.

7. The method of claim 1, further comprising:

8. A method for enhancing cellular network uplink ECN mechanism, applied to a sending terminal, the method comprising:

9. The method of claim 8, further comprising:

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.

10. The method of claim 8, wherein the notification message is a PDCP PDU, an RLC PDU, a MAC CE, or an RRC message.

11. The method of claim 10, wherein the MAC CE and RRC messages include identification information of DRBs or LCHs with congested air interface uplink.

12. The method according to claim 8, wherein the indication message sent to the upper layer is used to inform a TCP layer of the sending terminal to adjust a sending rate of a TCP packet.

13. The method of claim 12, further comprising:

14. The method of claim 12,

15. The method according to claim 9 or 12,

the indication information sent to the upper layer is used for informing a TCP layer of the sending terminal to adjust the sending rate of the TCP message; and/or the presence of a gas in the gas,

the indication information sent to the upper layer is further used for notifying a TCP layer of the sending terminal to record TCP information contained in the indication information, wherein the TCP information contains a TCP sequence number.

16. The method according to claim 14 or 15, characterized in that the method further comprises:

17. The method of claim 16, further comprising:

and when the next message is sent, reducing the congestion window of the TCP header by the CWR position according to an ECN mechanism.

18. A transmission apparatus of uplink enhanced ECN mechanism for a cellular network, applied to a base station, the apparatus comprising: a processor and a memory, wherein the processor is capable of processing a plurality of data,

the memory is used for storing programs;

19. A transmission device of cellular network uplink enhanced ECN mechanism is applied to a base station and comprises the following components: 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 state information of an air interface uplink between the sending terminal and a base station;

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

20. A transmission apparatus of uplink enhanced ECN mechanism for cellular network, applied to a base station, for implementing the method of any one of claims 1 to 7.

21. A transmission device of an uplink enhanced ECN mechanism for a cellular network, applied to a sending terminal, the device comprising: a processor and a memory;

the memory is used for storing programs;

22. A transmission device of an uplink enhanced ECN mechanism for a cellular network, applied to a sending terminal, the device comprising: 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 state information of an air interface uplink between the sending terminal and the base station;

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

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

23. A transmission device of an uplink enhanced ECN mechanism for a cellular network, characterized in that it is applied to a transmitting terminal for implementing the method of any one of claims 8 to 17.

24. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 17.

25. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-17.