CN111050341A

CN111050341A - Method and device for judging air interface congestion state in dual-connection scene

Info

Publication number: CN111050341A
Application number: CN201911350970.3A
Authority: CN
Inventors: 陈晓宇; 韩立锋
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: 2020-04-21
Anticipated expiration: 2039-12-24
Also published as: CN111050341B; WO2021128911A1

Abstract

The embodiment of the application discloses a method for judging an air interface congestion state in a dual-connection scene, which comprises the following steps: the first equipment receives first congestion indication information and second congestion indication information; and the first equipment judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information. By adopting the invention, whether the uplink and downlink communication link of the user equipment is congested or not under the double-connection scene can be definitely judged.

Description

Method and device for judging air interface congestion state in dual-connection scene

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining an air interface congestion state in a dual connectivity scenario.

Background

In order to improve User experience of User Equipment (UE) and enhance data transmission stability, an Explicit Congestion Notification (ECN) mechanism is introduced to indicate a Congestion state of an air interface link between the UE and a base station. However, in a dual connectivity scenario, the ECN mechanism cannot explicitly determine the congestion state of the air interface link of the UE.

How to definitely determine and correspondingly process the congestion state of an air interface link in a dual-connection scene is a technical problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a method and a device for judging the congestion state of an air interface in a dual-connection scene, which can be used for definitely judging and correspondingly processing the congestion state of an air interface link in the dual-connection scene.

In a first aspect, an embodiment of the present application provides a method for determining an air interface congestion state in a dual connectivity scenario, including:

receiving first congestion indication information and second congestion indication information, wherein the first congestion indication information is used for indicating that a first communication link between user equipment and a first communication unit is congested, the second congestion indication information is used for indicating that a second communication link between the user equipment and a second communication unit is congested, and the first equipment is the user equipment or the first communication unit;

the first congestion indication information and the second congestion indication information are used for obtaining the congestion state of the communication link of the user equipment.

In a second aspect, an embodiment of the present application provides an apparatus for determining an air interface congestion state in a dual connectivity scenario, including a processing module and a communication module,

the processing module is configured to receive, by using a communication module, first congestion indication information and second congestion indication information, where the first congestion indication information is used to indicate that a first communication link between a user equipment and a first communication unit is congested, and the second congestion indication information is used to indicate that a second communication link between the user equipment and a second communication unit is congested, where the first equipment is the user equipment or the first communication unit;

In a third aspect, an embodiment of the present application further provides a device for determining an air interface congestion state in a dual connectivity scenario, including a processor and a communication interface,

the processor is configured to receive, by using a communication interface, first congestion indication information and second congestion indication information, where the first congestion indication information is used to indicate that a first communication link between a user equipment and a first communication unit is congested, and the second congestion indication information is used to indicate that a second communication link between the user equipment and a second communication unit is congested, where the first equipment is the user equipment or the first communication unit;

In a fourth aspect, an embodiment of the present application further provides a device for determining an air interface congestion state in a dual connectivity scenario, which is used to implement the method for determining an air interface congestion state in a dual connectivity scenario in the first aspect.

In a fifth aspect, an embodiment of the present application further provides a device for determining an air interface congestion state in a dual connectivity scenario, where the device for determining an air interface congestion state in a dual connectivity scenario includes a processor and a memory, and the memory is coupled to the processor, so that the device for determining an air interface congestion state in a dual connectivity scenario performs the method for determining an air interface congestion state in a dual connectivity scenario of the first aspect.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the instructions cause the computer to execute the method for determining an air interface congestion state in a dual connectivity scenario in the first aspect.

In a seventh aspect, an embodiment of the present application provides a computer program product, which includes instructions, and when the computer program product runs on a computer, the computer executes the method for determining an air interface congestion state in a dual connectivity scenario in the first aspect.

In an eighth aspect, an embodiment of the present application provides a system for determining an air interface congestion state in a dual connectivity scenario, where the system for determining an air interface congestion state in a dual connectivity scenario includes a determining device, and the determining device is configured to implement the method for determining an air interface congestion state in a dual connectivity scenario in the first aspect.

According to the embodiment of the application, whether the uplink and downlink communication links of the user equipment are congested or not under the double-connection scene is definitely judged according to the receiving conditions of the first congestion indication information and the second congestion indication information, so that corresponding response information can be fed back according to the congestion states of the uplink and downlink communication links of the user equipment in the following process, the data transmission rate of the sending end equipment can be adjusted, the network function can be optimized, and the stability of an ECN mechanism can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced 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 format of an IP header;

FIG. 2 is a schematic diagram of a modification of the ECN mechanism at the IP layer;

FIG. 3 is a diagram illustrating three cases of ECN mechanism in IP layer;

FIG. 4 is a format of a TCP header;

FIG. 5 is a diagram of a modification of the ECN mechanism at the TCP layer;

fig. 6 is a system architecture diagram of a downlink communication link;

fig. 7 is a system architecture diagram of an uplink communication link;

fig. 8 is a system architecture diagram for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 9 is a system architecture diagram for determining an air interface congestion state in another dual connectivity scenario according to the embodiment of the present application;

fig. 10 is a system architecture diagram for determining an air interface congestion state in another dual connectivity scenario according to the embodiment of the present application;

fig. 11 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 12 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 13 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 14 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 15 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a device for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a device for determining an air interface congestion state in another dual connectivity scenario according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, 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.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than described or illustrated herein. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In order to better understand the method and the apparatus for determining an air interface congestion state in a dual connectivity scenario provided in the embodiments of the present application, technical terms related to the present application are explained as follows:

(1) ECN mechanism

Currently, determining and communicating congestion status using ECN mechanisms involves three aspects:

in a first aspect: if a PDCP SDU (Service Data unit of the Packet Data Convergence Protocol layer) has one of two ECT (ECN-enabled transport) codes and experiences congestion, the base station places the PDCP SDU in a CE (congestion experienced) bit.

In a second aspect: copying ECN bit (ECN field) of an IP (Internet Protocol) head in PDCP SDU (packet Data Service) into an RLC SDU (Radio Link Control-Service Data Unit, Service Data Unit of Radio Link Control layer) head, and modifying and indicating congestion of the ECN field on a corresponding RLC PDU (Radio Link Control-Protocol Data Unit, Protocol Data Unit of Radio Link Control layer) by an RLC (Radio Link Control) layer.

In a third aspect: congestion of a receiving end is indicated by a Radio Link Control-Control Protocol data unit (rlc PDU) or a media Access Control-Protocol advanced (MAC CE) bit, the receiving end forwards the Congestion indication (after processing) to an IP layer, and the IP layer performs ECN setting on a data packet and delivers the data packet to a Transmission Control Protocol (TCP) layer for processing.

Fig. 1 shows a format of an IP header, and please refer to fig. 1, the IP header includes:

4 bit version number for indicating the IP protocol version used by the IP datagram; wherein, the IP protocol versions used by two devices communicating with each other must be the same;

4-bit header length, which is used to indicate the length of the IP protocol header and has a unit of 32-bit bytes;

an 8-bit service type, the 8-bit service type comprising a 3-bit priority field, a 1-bit reserved bit, and a 4-bit service type field; the 4-bit service type fields are respectively used for representing minimum delay, maximum throughput, highest reliability and minimum cost, and the 4-bit service type fields conflict with one another, and only one position is 1 at a time;

the total length of a 16-bit data packet is used to indicate the length of the entire packet (header and data), and is in bytes. After the IP message is fragmented, the value of the field in each fragment is the total length of the fragment (the header length of the fragment and the data length of the fragment);

16 bit identification bits used for representing the IP message sent by the unique identification host; if the IP message is fragmented at the data link layer, the fragmented message fields are the same, a counter is maintained in a memory of the IP layer, 1 is added to the counter every time a datagram is generated, and the counter value is assigned to the 16-bit identification bit;

a 3-bit flag bit, the 3-bit flag bit comprising a 1-bit reserved bit, a 1-bit "forbidden fragmentation" (NF) flag bit, and a 1-bit "more fragmentation" (MF) flag bit; the NF flag bit is used for indicating that when the length of the IP packet exceeds a Maximum Transmission Unit (MTU) required by a data link layer protocol, fragmentation is to be performed, that is, the NF flag bit is 1, which indicates that fragmentation is prohibited, the IP packet is discarded, and the NF flag bit is 0, which indicates fragmentation is possible; the MF flag bit is used for setting the MF flag bit to 0 if the IP message is fragmented, and setting the MF flag bit to 1 if the IP message is the last fragment;

and 13-bit slice offset, which is used for representing the offset of the fragmented IP message relative to the initial position of the original IP message, wherein the actual offset is as follows: the 13-bit representation is obtained by multiplying 8; therefore, except the last fragment, the lengths of the other fragments are integral multiples of 8;

8bit survival time, which is used for expressing the maximum message hop number of the message reaching the destination address;

an 8-bit protocol number used to indicate the type of upper layer protocol, for example: TCP protocol or UDP protocol, etc.;

a 16-bit checksum for checking whether the header of the packet is corrupted, excluding the data portion, using a CRC check; checking the checksum every time when a node passes;

a 32-bit source IP address, representing the source host IP address of the datagram;

a 32-bit destination IP address, representing the destination host IP address of the datagram;

and the option is used for applying for the memory at the option when the size of the IP header is not enough.

As shown in fig. 2, the modification of ECN mechanism at IP layer includes: the ECN redefines res fields of 7 th and 8 th bits of the 8-bit service type field of the IP header as an ECN field. As shown in fig. 3, the ECN mechanism in the IP layer has the following three cases:

the first condition is as follows: when congestion occurs, the ECN field is 00, which indicates that the message does not support ECN, and the original common non-ECN flow is performed, that is, overload packet loss is performed.

Case two: when congestion occurs, the ECN field is 01 or 10, the ECN field is modified to 11, and the forwarding process is continued.

Case three: when congestion occurs, the ECN field is 11, and the forwarding process is continued.

It should be noted that, in order to ensure fairness with non-ECN-supported messages, when a queue exceeds a certain length, discarding of the ECN-supported messages needs to be considered.

Fig. 4 shows the format of a TCP header, and referring to fig. 4, the TCP header includes:

a source port number of 16 bits for indicating which application process of an upper layer the sender data is delivered by;

a destination port number of 16 bits for indicating which application process the data is to be delivered to the recipient;

a 32-bit sequence number and a 32-bit acknowledgement sequence number for use in guaranteeing requests and replies; arriving in sequence; a retransmission mechanism; high-efficiency sending in batches;

header length of 4 bits: how many 32 bits (or how many 4 bytes) the protocol header of TCP is represented;

reserving 6 bits, which are reserved for expanding performance;

6 flag bits, wherein the 6 flag bits include URG (emergency flag bit), ACK (acknowledgement flag bit), PSH (bit-pushing flag bit), PST (reset flag bit) and SYN (synchronization flag bit); wherein, URG is used to indicate whether the urgent pointer is valid, and the bit of 1 indicates valid; the ACK is generally valid all the time during the data communication process, i.e. always 1; the PSH is used for urging the receiver to catch up and read the data in the receiving buffer, namely when the receiving buffer of the receiver is full, the sender sends a message segment carrying the flag bit (the flag bit is set to be 1) to the receiver; the PST is used for sending the segment carrying the flag bit (setting the flag bit to be 1) to the opposite side when one side needs to reestablish connection, and the segment carrying the flag bit is called as a reset segment; SYN, which is used to send the synchronous segment carrying the flag bit to the other side when one side requests connection; the FIN is used for sending the ending message segment carrying the flag bit to the other party when the connection of the other party is to be disconnected;

the window size of 16 bits is used for filling the memory of the receiving buffer area when the sending end sends the message;

16-bit checksum used for transmitting end filling and receiving end checking; if the verification fails, the data is considered to have problems;

a 16-bit urgent pointer for indicating which part of data is urgent data needs to be preferentially transmitted.

The effect is achieved by matching with URG;

the 40 byte option is used for memory application at the 20 byte header when the size is not enough.

As shown in fig. 5, the ECN mechanism modification at the TCP layer includes: the ECN modifies res fields (the last two bits in 6-bit fields are reserved) of bit 8 and bit 9 of the TCP header into CWR (Congestion Window reduction) zone bits and ECE (ECN-Echo, which displays Congestion reminding response) zone bits, and modifies bit 7 (the 4 th bit in 6-bit fields is reserved) into NS (random sum, experimental addition, which prevents the packet marking from being changed accidentally or maliciously) zone bits. The response of the TCP layer to the ECN mechanism is as follows:

first, when the TCP receiving end receives ECN in the IP header equal to 11, it sets ECE bit to 1 in response to ACK (acknowledgement signal), and sets ECE bit to 1 in all subsequent ACKs.

Then, when the TCP sending end receives the ACK message with ECE set to 1, the sending rate is adjusted, and when the next message is sent, the CWR bit (CWR flag bit) of the TCP header is set to 1.

Then, when the TCP receiving end receives the message with CWR set to 1, the ECE of the TCP header in the subsequent ACK signal will not be set to 1 again, and the above process is repeated until the ECN of the IP header is received again as 11.

The ECN mechanism cannot explicitly determine the congestion state of an air interface link in a dual connectivity scenario.

(2) Downlink and uplink communication links

And the data is sent to the receiving end equipment by the sending end equipment through the base station. As shown in fig. 6, when the user equipment 601 is a receiving end device, the server 602 is a sending end device, and data is sent to the user equipment 601 by the server 602 through the core network and/or the route 604 and the base station 603, a communication link between the base station 603 and the user equipment 601 is a downlink communication link. The server 602 may also be replaced by a palm top computer, a mobile device, etc.

As shown in fig. 7, when the user equipment 701 is a sending end device, the server 702 is a receiving end device, and data is sent from the user equipment 701 to the server 702 through the core network and/or the route 704 and the base station 703, a communication link between the user equipment 701 and the base station 703 is an uplink communication link. The server 702 may also replace a palm top computer, a mobile device, etc.

In order to better understand the congestion determination method and the congestion determination device provided in the embodiments of the present application, a system architecture related to the present application is introduced.

Fig. 8 is a system architecture diagram for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application. The system may not be limited to the Long Term Evolution (LTE) mobile communication system, the fourth generation mobile communication (the 4)^thGeneration,4G) system, fifth Generation mobile communication (the 5)^thGeneration,5G) system, and new air interface (NR) system, etc. The system may include: user equipment 801, secondA base station 802, a second base station 803, and a second device 804. Fig. 11 shows a case where a user equipment 801 communicates with a first base station 802, the user equipment 801 communicates with a second base station 803, the first base station 802 communicates with a second base station 804, and the second base station 803 communicates with the first base station 802, which is used for example and does not constitute a limitation to the embodiment of the present application, and in practical applications, one user equipment 801 may communicate with a plurality of base stations. Wherein the first base station 802 may communicate with the second device 804 via a core network and/or a route 805, and the second base station 803 may communicate with the first base station 802 via an Xn interface or an X2 interface.

The user equipment 801 may be distributed throughout a wireless communication system, and may be stationary, such as a desktop computer, a stationary mainframe computer, or the like, or Mobile, such as a Mobile device, a Mobile Station (Mobile Station), a Mobile Unit (Mobile Unit), an M2M terminal, a wireless Unit, a remote Unit, a user agent, a Mobile client, or the like. The user equipment 801 may be a receiving end device or a transmitting end device in a communication link of the user equipment 804.

The first base station 802 and the second base station 803 may be evolved node bs (enodebs) in the LTE system, or may be 4G (the 4 th base station)^thGeneration, fourth Generation mobile communication) system, 5G (the 5)^thGeneration, fifth Generation mobile communication) system, a new air interface (NR) system. In addition, the base station may also be an Access Point (AP), a Transmission Point (TRP), a centralized unit, or other network entities, and may include some or all of the functions of the above network entities.

The second device 804 may be a server, a palm computer, a mobile device, or the like, and the second device 804 may be a receiving end device or a sending end device in the communication link of the user device 801.

Fig. 9 is a system architecture diagram for determining an air interface congestion state in another dual connectivity scenario according to the embodiment of the present application. The system may not be limited to a long term evolution mobile communication system, a fifth generation mobile communication system, a fourth generation mobile communication system, a new air interface system, and the like. The system may include: user equipment 901, central unit cu (centralized unit)902, first distribution unit DU (distributed unit) 1903, second distribution unit DU2904 and second equipment 905; the concentration unit CU 902 is a concentration unit of the third base station 906, and the first distribution unit DU 1903 and the second distribution unit DU2904 are distribution units of the third base station 906. Fig. 9 shows a case where the user equipment 901 communicates with the first distribution unit DU 1903, the user equipment 901 communicates with the second distribution unit DU2904, the first distribution unit DU 1903 communicates with the central unit CU 902, the second distribution unit DU2904 communicates with the central unit CU 902, and the second equipment 905 communicates with the third base station 906, which is used for example and not limiting the embodiment of the present application, and in practical applications, one user equipment 901 may communicate with a plurality of distribution units, and one CU may communicate with a plurality of DUs. Wherein the third base station 906 may communicate with the second device 905 through the core network and/or the route 907, i.e. the central unit CU 902 may communicate with the second device 905 through the core network and/or the route 907; the first distribution unit DU 1903 may communicate with the central unit CU 902 via the F1 interface of the GTP-U and the second distribution unit DU2904 may communicate with the central unit CU 902 via the F1 interface of the GTP-U.

User devices 901 may be distributed throughout a wireless communication system and may be stationary, such as a desktop computer, a stationary mainframe computer, or the like, or mobile, such as a mobile device, mobile station, mobile unit, M2M terminal, wireless unit, remote unit, user agent, mobile client, or the like. The user equipment 901 may be a receiving end device in a communication link of the user equipment 905, and may also be a sending end device.

The second device 905 may be a server, a palm computer, a mobile device, or the like, and the second device 905 may be a receiving end device or a sending end device in a communication link of the user device 901.

The third base station 906 may be an evolved base station in the LTE system, or may be a base station in a 4G system, a 5G system, or a new air interface system. In addition, a base station may also be an access point, a transmission node, a central unit or other network entity, and may include some or all of the functionality of the above network entities.

Fig. 10 is a system architecture diagram for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application. The system may not be limited to a long term evolution mobile communication system, a fifth generation mobile communication system, a fourth generation mobile communication system, a new air interface (NR) system, and the like. The system may include: user equipment 1001, central unit CU 1002, first distribution unit DU 11003, second distribution unit DU 21004 and second equipment 1005; the central unit CU 1002 is a central unit of the fourth base station 1006, the first distribution unit DU 11003 is a distribution unit of the fourth base station 1006, and the second distribution unit DU 21004 is a distribution unit DU of the fifth base station 1007. Fig. 10 shows a case where the user equipment 1001 communicates with the first distribution unit DU 11003, the user equipment 1001 communicates with the second distribution unit DU 21004, the first distribution unit DU 11003 communicates with the central unit CU 1002, the second distribution unit DU 21004 communicates with the central unit CU 1002, and the second device 1005 communicates with the fourth base station 1006, for example, and does not limit the embodiment of the present application, and in practical applications, one user equipment may communicate with a plurality of distribution units 1001 and one CU may communicate with a plurality of DUs. The fourth base station 1006 may communicate with the second device 1005 via the core network and/or the route 1008, i.e. the central unit CU 1002 may communicate with the second device 1005 via the core network and/or the route 1008; the fourth base station 1006 may communicate with the fifth base station 1007 over an Xn interface or an X2 interface.

User equipment 1001 may be distributed throughout a wireless communication system and may be stationary, such as a desktop computer, a stationary mainframe computer, or the like, or mobile, such as a mobile device, mobile station, mobile unit, M2M terminal, wireless unit, remote unit, user agent, mobile client, or the like. The user equipment 1001 may be a receiving end device in a communication link of the user equipment 1001, and may also be a transmitting end device.

The second device 1005 may be a server, a palm computer, a mobile device, or the like, and the second device 1005 may be a receiving end device or a sending end device in the communication link of the user device 1001.

The fourth base station 1006 and the fifth base station 1007 may be evolved base stations in an LTE system, or may be base stations in a 4G system, a 5G system, and a new air interface system. In addition, a base station may also be an access point, a transmission node, a central unit or other network entity, and may include some or all of the functionality of the above network entities.

Referring to fig. 11, fig. 11 is a flowchart illustrating a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application, where the method operation steps described in the embodiment or the flowchart are provided in this specification, but more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or storage medium product in practice executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures. As shown in fig. 11, the method includes, but is not limited to, the following steps:

s1101: the first device receives first congestion indication information and second congestion indication information.

The first congestion indication information is used for indicating that a first communication link between user equipment and a first communication unit is congested, the second congestion indication information is used for indicating that a second communication link between the user equipment and a second communication unit is congested, and the first equipment is the user equipment or the first communication unit; if the communication link of the user equipment is a downlink communication link, the first equipment is the user equipment; and if the communication link of the user equipment is an uplink communication link, the first equipment is a first communication unit.

S1102: and the first equipment judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

If the first device receives the first congestion indication information and the second congestion indication information, determining that a communication link of the user equipment is in a congestion state; if the first equipment receives the first congestion indication information and does not receive the second congestion indication information, judging that a communication link of the user equipment is not in a congestion state; if the first equipment receives the second congestion indication information and does not receive the first congestion indication information, judging that a communication link of the user equipment is not in a congestion state; and if the first equipment does not receive the second congestion indication information and the first congestion indication information, judging that the communication link of the user equipment is not in a congestion state.

In an embodiment, the first device includes a PDCP layer, and the PDCP layer of the first device determines a congestion state of a communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the first device further generates first indication information according to the first congestion indication information and the second congestion indication information;

and carrying the first indication information in a congestion data packet transmitted by the first device, so as to indicate that a communication link of the user equipment is in a congestion state.

Wherein the loading the first indication information in the congestion data packet transmitted by the first device includes:

and setting an ECN field of a congestion data packet transmitted by the first equipment as a CE according to the first indication information.

In the method described in fig. 11, the first device definitely determines whether the uplink and downlink communication links of the user equipment are congested in the dual connectivity scenario according to the receiving conditions of the first congestion indication information and the second congestion indication information, so as to feed back corresponding response information according to the congestion states of the uplink and downlink communication links of the user equipment in the subsequent procedure, adjust the data transmission rate of the sending-end device, optimize the network function, and improve the stability of the ECN mechanism.

Referring to fig. 12, fig. 12 is another schematic flow chart of a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application, where the present specification provides operation steps of the method according to the embodiment or the flowchart, but the method may include more or less operation steps based on conventional or non-creative labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or storage medium product in practice executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures. Referring to the communication framework shown in fig. 8, when a communication link of the user equipment is a downlink communication link, the first device is the user equipment, the first communication unit is a first base station, the second communication unit is a second base station, the user equipment is a receiving end device, and the second device is a sending end device. As shown in fig. 12, the method includes, but is not limited to, the steps of:

s1201: the first base station detects whether the first communication link is congested; the second base station detects whether the second communication link is congested.

S1202: if the first base station detects that the first communication link is congested, generating first congestion indication information;

and if the second base station detects that the second communication link is congested, generating second congestion indication information.

The first congestion indication information is used for indicating that a first communication link between the user equipment and a first base station is congested, and the second congestion indication information is used for indicating that a second communication link between the user equipment and a second base station is congested.

S1203: the first base station sends the first congestion indication information to the user equipment; and the second base station sends the second congestion indication information to the user equipment.

In an embodiment, the first congestion indication information and the second congestion indication information may be carried in a target control signaling; wherein, the target control signaling is RLC control PDU or MAC CE.

The first base station can bear first congestion indication information through a target control signaling and send the first congestion indication information to user equipment; the second base station can bear second congestion indication information through the target control signaling and send the second congestion indication information to the user equipment.

S1204: the user equipment receives the first congestion indication information and the second congestion indication information.

In an embodiment, the user equipment includes a PDCP layer, and the PDCP layer receives the first congestion indication information and the second congestion indication information.

S1205: and the user equipment judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

The specific method for determining the congestion state of the communication link of the ue refers to the method described in fig. 11, which is not described herein again.

In an embodiment, the PDCP layer of the user equipment determines a congestion state of a communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

S1206: the user equipment sends first response information to the second equipment according to the congestion state of a communication link of the user equipment;

wherein the first response information is used for feeding back congestion state information of the communication link to the second device.

In an embodiment, the ue further generates first indication information according to the first congestion indication information and the second congestion indication information;

and the user equipment bears the first indication information on the congestion data packet transmitted by the user equipment to indicate that a communication link of the user equipment is in a congestion state, namely, the user equipment sets an ECN field of the congestion data packet transmitted by the user equipment as CE according to the first indication information.

Specifically, in the data transmission protocol, the user equipment further includes an IP layer and a TCP layer; a PDCP layer of the user equipment sends first indication information to an IP layer of the user equipment; referring to fig. 1 to fig. 3, the IP layer of the ue sets the ECN field of the IP header of the data packet as CE according to the first indication information, so as to obtain a congestion data packet carrying the first indication information; the user equipment transmits the congestion data packet from the IP layer of the user equipment to the TCP layer of the user equipment; referring to fig. 4 and 5, the TCP layer of the ue executes ECN response according to the congestion data packet to generate first response information, for example: an ACK signal; the user equipment sends the first response information to the second equipment.

S1207: and after receiving the first response message, the second equipment responds to the first response message and adjusts the data sending rate.

In the method described in fig. 12, the ue explicitly determines whether the downlink communication link of the ue is congested in the dual connectivity scenario according to the receiving conditions of the first congestion indication information and the second congestion indication information, so as to facilitate feeding back corresponding response information according to the congestion state of the downlink communication link of the ue in the following, adjust the data transmission rate of the sending end device, optimize the network function, and improve the stability of the ECN mechanism.

Referring to fig. 13, fig. 13 is another schematic flow chart of a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application, where the method operation steps described in the embodiment or the flowchart are provided in this specification, but more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or storage medium product in practice executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures. Referring to the communication framework shown in fig. 8, when a communication link of the first device is an uplink communication link, the first device is a first communication unit, the first communication unit is a first base station, the second communication unit is a second base station, the user equipment is a sending end device, and the second device is a receiving end device, where PDCP entities on network sides of DRBs corresponding to the first communication link and the second communication link are located in the first communication unit, that is, PDCP entities on network sides of DRBs corresponding to the first communication link and the second communication link are located in the first base station. As shown in fig. 13, the method includes, but is not limited to, the steps of:

s1301: the method comprises the steps that a first base station detects whether a first communication link between user equipment and the first base station is congested;

the second base station detects whether a second communication link between the user equipment and the second base station is congested.

S1302: if the first base station detects that the first communication link is congested, generating first congestion indication information; if the second base station detects that the second communication link is congested, generating second congestion indication information;

S1303: the second base station sends the second congestion indication information to the first base station;

in an embodiment, the second base station may send the second congestion indication information to the first base station through an X2 or an Xn interface.

S1304: the first base station receives the second congestion indication information.

In an embodiment, the PDCP layer of the first base station receives first congestion indication information and second congestion indication information.

S1305: and the first base station judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the PDCP layer of the first base station determines a congestion state of a communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the first base station further generates first indication information according to the first congestion indication information and the second congestion indication information;

the first base station carries the first indication information on the congestion data packet transmitted by the first base station, so as to indicate that a communication link of the user equipment is in a congestion state, that is, the first base station sets an ECN field of the PDCP SDU of the first base station to be CE according to the first indication information, and obtains the congestion data packet.

S1306: and the first base station sends a congestion data packet carrying the first indication information to the second equipment.

And the first base station can forward the congestion data packet carrying the first indication information to the second equipment through a core network and/or a route.

S1307: and the second equipment sends second response information to the user equipment based on the first indication information, wherein the second response information is used for informing the user equipment that the communication link is in a congestion state.

The second device executes an ECN response according to the congestion data packet, and generates second response information, for example: an ACK signal; the second device sends the second response information to the user equipment.

S1308: and after receiving the second response message, the user equipment responds to the second response message and adjusts the data sending rate.

In the method described in fig. 13, the first base station explicitly determines whether the uplink communication link of the ue is congested in the dual connectivity scenario according to the receiving conditions of the first congestion indication information and the second congestion indication information, so as to facilitate feeding back corresponding response information according to the congestion state of the uplink communication link of the ue in the following, adjust the data transmission rate of the sending end device, optimize the network function, and improve the stability of the ECN mechanism.

Referring to fig. 14, fig. 14 is another schematic flow chart of a method for determining an air interface congestion state in a dual connectivity scenario provided in this application, where this specification provides the method operation steps described in this embodiment or the flowchart, but the method may include more or less operation steps based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or storage medium product in practice executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures. Application scenario of the method referring to the communication framework shown in fig. 9, when the communication link of the first device is an uplink communication link, the first device is a first communication unit, and the first communication unit is a first distribution unit DU1 and a centralized unit CU of a third base station; the second communication unit is a second distribution unit DU2 of the third base station, the user equipment is a sending end device, and the second device is a receiving end device. As shown in fig. 14, the method includes, but is not limited to, the steps of:

s1401: the first distribution unit DU1 of the third base station detects whether the first communication link between the user equipment and the first distribution unit DU1 of the third base station is congested;

the second distribution unit DU2 of the third base station detects whether the second communication link between the user equipment and the second distribution unit DU2 of the third base station is congested.

S1402: if the first distribution unit DU1 of the third base station detects that the first communication link is congested, it generates first congestion indication information; if the second distribution unit DU2 of the third base station detects that the second communication link is congested, generating second congestion indication information;

wherein the first congestion indication information is used to indicate that a first communication link between the user equipment and a first distribution unit DU1 of a third base station is congested, and the second congestion indication information is used to indicate that a second communication link between the user equipment and a second distribution unit DU2 of the third base station is congested.

S1403: the first distribution unit DU1 of the third base station sends the first congestion indication information to the central unit CU of the third base station;

the second distribution unit DU2 of the third base station sends the second congestion indication information to the central unit CU of the third base station;

in one embodiment, the first congestion indication information is sent by the first distribution unit DU1 of the third base station to the central unit CU of the third base station over the F1 interface of GTP-U, and the second congestion indication information is sent by the second distribution unit DU2 of the third base station to the central unit CU of the third base station over the F1 interface of GTP-U. And the centralized unit CU is used for realizing data encapsulation and transmission from the physical bottom layer to the top layer. The third base station comprises a PDCP layer, which is located in a central unit CU of the third base station.

S1404: the concentration unit CU of the third base station receives the first congestion indication information and the second congestion indication information.

Specifically, the PDCP layer of the central unit CU located at the third base station receives the first congestion indication information and the second congestion indication information.

S1405: and the centralized unit CU of the third base station judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the PDCP layer located in the central unit CU of the third base station determines the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the third base station further generates first indication information according to the first congestion indication information and the second congestion indication information;

and the third base station loads the first indication information on the congestion data packet transmitted by the third base station to indicate that a communication link of the user equipment is in a congestion state, namely, the third base station sets an ECN field of the PDCP SDU of the third base station as CE according to the first indication information to obtain the congestion data packet.

S1406: and the centralized unit CU of the third base station sends a congestion data packet carrying the first indication information to the second equipment.

Wherein the central unit CU of the third base station may forward the congested data packets to the second device via the core network and/or the route.

S1407: and the second equipment sends second response information to the user equipment based on the first indication information, wherein the second response information is used for informing the user equipment that the communication link is in a congestion state.

S1408: and after receiving the second response message, the user equipment responds to the second response message and adjusts the data sending rate.

In the method described in fig. 14, the third base station explicitly determines whether the uplink communication link of the ue is congested in the dual connectivity scenario according to the receiving conditions of the first congestion indication information and the second congestion indication information, so as to feed back corresponding response information according to the congestion state of the uplink communication link of the ue, adjust the data transmission rate of the sending end device, optimize the network function, and improve the stability of the ECN mechanism.

Referring to fig. 15, fig. 15 is another schematic flow chart of a method for determining an air interface congestion state in a dual connectivity scenario according to an embodiment of the present application, where the present specification provides operation steps of the method according to the embodiment or the flowchart, but the method may include more or less operation steps based on conventional or non-creative labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or storage medium product in practice executes, it can execute sequentially or in parallel according to the method shown in the embodiment or the figures. Referring to the communication framework shown in fig. 10, when a communication link of the first device is an uplink communication link, the first device is a first communication unit, the first communication unit is a first distribution unit DU1 and a centralized unit CU of a fourth base station, the second communication unit is a second distribution unit DU2 of a fifth base station, the user equipment is a sending end device, and the second device is a receiving end device, where PDCP entities on network sides of DRBs corresponding to the first communication link and the second communication link are located in the first communication unit, that is, PDCP entities on network sides of DRBs corresponding to the first communication link and the second communication link are located in the fourth base station. As shown in fig. 15, the method includes, but is not limited to, the steps of:

s1501: the first distribution unit DU1 of the fourth base station detects whether the first communication link between the user equipment and the first distribution unit DU1 of the fourth base station is congested;

the second distribution unit DU2 of the fifth base station detects whether the second communication link between the user equipment and the second distribution unit DU2 of the fifth base station is congested.

S1502: if the first distribution unit DU1 of the fourth base station detects that the first communication link is congested, it generates first congestion indication information; if the second distribution unit DU2 of the fifth base station detects that the second communication link is congested, generating second congestion indication information;

wherein the first congestion indication information is used to indicate that a first communication link between the user equipment and a first distribution unit DU1 of the fourth base station is congested, and the second congestion indication information is used to indicate that a second communication link between the user equipment and a second distribution unit DU2 of the fifth base station is congested.

S1503: the first distribution unit DU1 of the fourth base station sends the first congestion indication information to the central unit CU of the fourth base station;

the second distribution unit DU2 of the fifth base station sends the second congestion indication information to the central unit CU of the fourth base station.

Wherein the concentration unit CU is adapted to enable physical bottom-to-top data encapsulation and transmission. The PDCP layer of the fourth base station is located in a central unit CU of the fourth base station.

S1504: the concentration unit CU of the fourth base station receives the first congestion indication information and the second congestion indication information.

Specifically, the PDCP layer of the central unit CU located at the fourth base station receives the first congestion indication information and the second congestion indication information.

S1505: and the centralized unit CU of the fourth base station judges the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the PDCP layer located in the central unit CU of the fourth base station determines the congestion state of the communication link of the user equipment according to the first congestion indication information and the second congestion indication information.

In an embodiment, the fourth base station further generates first indication information according to the first congestion indication information and the second congestion indication information;

and the fourth base station loads the first indication information on the congestion data packet transmitted by the fourth base station to indicate that a communication link of the user equipment is in a congestion state, namely, the fourth base station sets an ECN field of the PDCP SDU of the fourth base station as CE according to the first indication information to obtain the congestion data packet.

S1506: and the central unit CU of the fourth base station sends a congestion data packet carrying the first indication information to the second equipment.

Wherein the central unit CU of the fourth base station may forward the congested data packets to the second device via the core network and/or the route.

S1507: and the second equipment sends second response information to the user equipment based on the first indication information, wherein the second response information is used for informing the user equipment that the communication link is in a congestion state.

S1508: and after receiving the second response message, the user equipment responds to the second response message and adjusts the data sending rate.

In the method described in fig. 15, the fourth base station explicitly determines whether the uplink communication link of the ue is congested in the dual connectivity scenario according to the receiving conditions of the first congestion indication information and the second congestion indication information, so as to facilitate feeding back corresponding response information according to the congestion state of the uplink communication link of the ue in the following, adjust the data transmission rate of the sending end device, optimize the network function, and improve the stability of the ECN mechanism.

The following describes a data transmission device provided in an embodiment of the present application. In the embodiment of the present application, the data transmission device may be a terminal device, or may be a device (e.g., a chip or a processor) used in cooperation with the terminal device. The data transmission device may also be a network device, or may also be a device (e.g., a chip or a processor) used in cooperation with the network device.

Referring to fig. 16, a schematic structural diagram of a device for determining an air interface congestion state in a dual connectivity scenario provided in this embodiment of the present application is shown, where the device for determining an air interface congestion state in a dual connectivity scenario includes a processing module 1601 and a communication module 1602,

the processing module 1601 is configured to receive, by using the communication module 1602, first congestion indication information and second congestion indication information, where the first congestion indication information indicates that a first communication link between a user equipment and a first communication unit is congested, and the second congestion indication information indicates that a second communication link between the user equipment and a second communication unit is congested, where the determining device is the user equipment or the first communication unit;

In an embodiment, the processing module 1601 is further configured to generate first indication information according to the first congestion indication information and the second congestion indication information;

and carrying the first indication information in the congestion data packet transmitted by the determining device to indicate that the communication link of the user equipment is in a congestion state.

In an embodiment, the processing module 1601 is specifically configured to set, according to the first indication information, an ECN field of a congestion packet transmitted by the determining apparatus to be CE.

In an embodiment, the PDCP entities of the network sides of the DRBs corresponding to the first communication link and the second communication link are located in the first communication unit.

In an embodiment, if a communication link of the ue is a downlink communication link, the first congestion indication information and the second congestion indication information may be carried in a target control signaling;

wherein, the target control signaling is RLC control PDU or MAC CE.

In an embodiment, the first communication unit is a first base station, and the second communication unit is a second base station.

In an embodiment, the first communication unit is a first distribution unit DU1 and a centralized unit CU of a third base station; the second communication unit is a second distribution unit DU2 of a third base station;

the first congestion indication information is used to indicate that a first communication link between the user equipment and a first distribution unit DU1 of a third base station is congested, and the second congestion indication information is used to indicate that a second communication link between the user equipment and a second distribution unit DU2 of the third base station is congested.

In an embodiment, if the communication link of the ue is an uplink communication link, the first congestion indication information is sent by the first distribution unit DU1 of the third base station to the central unit CU of the third base station through an F1 interface of GTP-U, and the second congestion indication information is sent by the second distribution unit DU2 of the third base station to the central unit CU of the third base station through an F1 interface of GTP-U.

In an embodiment, the first communication unit is a first distribution unit DU1 and a centralized unit CU of a fourth base station, and the second communication unit is a second distribution unit DU2 of a fifth base station;

In an embodiment, if the communication link of the user equipment is an uplink communication link, the second congestion indication information is sent by the second communication unit to the first communication unit through an X2 or an Xn interface.

Referring to fig. 17, a schematic structural diagram of another apparatus for determining a congestion state of an air interface in a dual connectivity scenario provided in this embodiment of the present application is shown, where the apparatus for determining a congestion state of an air interface in a dual connectivity scenario includes a processor 1701 and a communication interface 1702,

the processor 1701 is configured to receive, by using the communication interface 1702, first congestion indication information and second congestion indication information, where the first congestion indication information indicates that a first communication link between the user equipment and a first communication unit is congested, and the second congestion indication information indicates that a second communication link between the user equipment and a second communication unit is congested, and the determining device is the user equipment or the first communication unit;

In an embodiment, the processor 1701 is further configured to generate first indication information according to the first congestion indication information and the second congestion indication information;

In an embodiment, the processor 1701 is specifically configured to set, according to the first indication information, an ECN field of a congestion packet transmitted by the determining device to be CE.

wherein, the target control signaling is RLC control PDU or MAC CE.

Accordingly, an embodiment of the present application further provides a device for determining an air interface congestion state in a dual connectivity scenario, where the device may implement the method for determining an air interface congestion state in a dual connectivity scenario illustrated in fig. 11.

Accordingly, an embodiment of the present application further provides a device for determining an air interface congestion state in a dual connectivity scenario, where the device for determining an air interface congestion state in a dual connectivity scenario includes a processor and a memory, and the memory is coupled to the processor, so that the device for determining an air interface congestion state in a dual connectivity scenario executes the method for determining an air interface congestion state in a dual connectivity scenario illustrated in fig. 11.

Accordingly, an embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, the instructions cause the computer to execute the method for determining an air interface congestion state in the dual connectivity scenario shown in fig. 11. It is understood that the computer storage medium herein may include a built-in storage medium in the data transmission apparatus, and may also include an extended storage medium supported by the data transmission apparatus. The computer storage medium provides a storage space storing an operating system of the smart terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. The computer storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory; and optionally at least one computer storage medium located remotely from the processor.

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 storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

Accordingly, an embodiment of the present application further provides a computer program product, which includes instructions, and when the computer program product runs on a computer, the computer is caused to execute the method for determining an air interface congestion state in a dual connectivity scenario in fig. 11.

Correspondingly, an embodiment of the present application further provides a system for determining an air interface congestion state in a dual connectivity scenario, where the system for determining an air interface congestion state in a dual connectivity scenario includes a determining device, and the determining device is configured to implement the method for determining an air interface congestion state in a dual connectivity scenario illustrated in fig. 11.

While the invention has been described with reference to a number of embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for judging an air interface congestion state in a dual-connection scene is applied to first equipment, and the method comprises the following steps:

2. The method of claim 1, wherein the method further comprises:

generating first indication information according to the first congestion indication information and the second congestion indication information;

3. The method of claim 2, wherein the loading the first indication information in a congestion packet transmitted by the first device comprises:

4. The method of claim 1, wherein the first communication link and the second communication link correspond to PDCP entities of the network side of the DRB located at the first communication unit.

5. The method according to any of claims 1-4, wherein the first congestion indication information and the second congestion indication information are carried in target control signaling if the communication link of the UE is a downlink communication link;

wherein, the target control signaling is RLC control PDU or MAC CE.

6. The method of any of claims 1-4, wherein the first communication unit is a first base station and the second communication unit is a second base station.

7. The method according to any of the claims 1-4, characterized in that the first communication unit is a first distribution unit DU1 and a concentration unit CU of a third base station; the second communication unit is a second distribution unit DU2 of a third base station;

8. The method of claim 7, wherein the first congestion indication information is sent by a first distribution unit DU1 of the third base station to the central unit CU of the third base station over an F1 interface of GTP-U and the second congestion indication information is sent by a second distribution unit DU2 of the third base station to the central unit CU of the third base station over an F1 interface of GTP-U, if the communication link of the user equipment is an uplink communication link.

9. The method according to any of the claims 1-4, characterized in that the first communication unit is a first distribution unit DU1 and a concentration unit CU of a fourth base station, the second communication unit is a second distribution unit DU2 of a fifth base station;

10. The method according to any of claims 1-4, wherein the second congestion indication information is sent by the second communications unit to the first communications unit over an X2 or Xn interface if the communications link of the user equipment is an uplink communications link.

11. A device for judging the air interface congestion state under the double-connection scene is characterized by comprising a processing module and a communication module,

12. A device for judging the air interface congestion state under the double-connection scene is characterized by comprising a processor and a communication interface,

13. A device for determining an air interface congestion state in a dual connectivity scenario, configured to implement the method according to any one of claims 1 to 10.

14. An apparatus for determining congestion status of an air interface in a dual connectivity scenario, wherein the apparatus comprises a processor and a memory, and the memory is coupled to the processor, so that the apparatus performs the method according to any one of claims 1 to 10.

15. A computer-readable storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-10.

16. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-10.

17. A system for determining an air interface congestion state in a dual connectivity scenario, where the system includes a determining apparatus, and the determining apparatus is configured to implement the method according to any one of claims 1 to 10.