WO2018233510A1

WO2018233510A1 - Communication method and apparatus

Info

Publication number: WO2018233510A1
Application number: PCT/CN2018/090734
Authority: WO
Inventors: 燕春翔; 银宇; 于游洋
Original assignee: 华为技术有限公司
Priority date: 2017-06-23
Filing date: 2018-06-12
Publication date: 2018-12-27
Also published as: CN109429270A

Abstract

Disclosed are a communication method and apparatus. The method comprises: a network device receives air interface connection states reported by at least two access network devices; and the network device determines a data distribution strategy according to the air interface connection states, the data distribution strategy being used for indicating a strategy for sending data to be data to a first access network device and a second access network. Also disclosed is a corresponding apparatus. By adopting the technical solution in the present application, a data distribution strategy can be determined according to air interface connection states reported by access network devices, thereby avoiding data transmission congestion and achieving smooth communication.

Description

Communication method and device

The present application claims the priority of the Chinese Patent Application, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background technique

With the enthusiasm for large-bandwidth applications such as online audio and video, terminal devices are increasingly demanding reliability for data transmission. However, the signal status of the wireless air interface changes rapidly and has a large amplitude, which may cause problems such as unreliable online audio and video transmission.

At this stage, most of the terminal devices supporting the third generation partnership project (3GPP) can support non-3GPP (non-3GPP, N3G) access modes, that is, terminal devices can access through 3GPP respectively. The mode and the N3G access mode are connected to a home public land mobile network (HPLMN). In this architecture, the 3GPP and N3G access network devices are connected to an access and mobility management function (AMF) and select the same user plane function (UPF) bearer service. Unified session management by session management function (SMF).

When there are multiple access modes, when the data transmission of a certain access mode is congested, the load or the shunt can be reasonably shared on the other side. However, there is no solution in the prior art for how to determine the strategy of data offloading.

Summary of the invention

The present application provides a communication method and apparatus for determining a data offloading strategy to avoid data transmission congestion to achieve smooth communication.

An aspect of the present application provides a communication method, including: a network device receiving an air interface connection status reported by at least two access network devices; and determining, by the network device, a data offload policy according to the air interface connection status, The policy of data offloading is used to indicate a policy of transmitting data to be sent to the first access network device and the second access network device. In this implementation manner, according to the air interface connection status reported by the access network device, the data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication.

In a possible implementation manner, the method further includes: the network device sending an air interface connection status report indication to the at least two access network devices, where the air interface connection status report indication is used to indicate that the real-time reporting is performed. The air interface connection status or the air interface connection status is reported according to an event trigger. In this implementation manner, when receiving the air interface connection status reported by the access network device, the network device may send an air interface connection status report indication to the access network device. It can be reported in real time, or it can be triggered according to the event.

In another possible implementation manner, the network device is a user plane function network element; and the air interface connection status reporting indication is carried in a downlink data packet header sent to the at least two access network devices.

In a further possible implementation, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the at least two access network devices. In this implementation manner, the air interface connection state is carried in the data packet header, which is simple to implement.

In another possible implementation manner, the determining, by the network device, the data offloading policy according to the air interface connection status, includes: performing, according to the air interface connection status and the second access reported by the first access network device The air interface connection status reported by the network device determines the amount of data carried by the first access mode and the second access mode, where the first access mode is an access technology corresponding to the first access network device, The second access mode is an access technology corresponding to the second access network device. In this implementation manner, the amount of data carried in the first access mode and the second access mode may be accurately determined according to the air interface connection state.

In another possible implementation manner, the air interface connection status includes at least one of the following information: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein, the access mode with a large air interface bandwidth carries a larger amount of data than the air interface bandwidth. The amount of data carried by the small access mode; and/or the amount of data carried by the access mode with a large packet loss rate is smaller than the amount of data carried by the access mode with a small packet loss rate; and/or the access mode with a large air interface queue delay The amount of data carried is smaller than the amount of data carried by the access mode with a small air interface queue delay. In this implementation manner, the air interface bandwidth, the air interface packet loss rate, and/or the air interface queue delay are factors that need to be considered for data offloading. According to any one or any two or three of the three factors, the traffic splitting strategy can be accurately determined. .

In another aspect of the present application, another communication method is provided, including: receiving, by a network device, an air interface connection status reported by a first access network device; and determining, by the network device, a data offloading policy according to the air interface connection status, The data offloading policy is used to indicate a policy for sending data to be sent to the first access network device and the second access network device, where the first access network device and the second access network device The network device has a session connection. In this implementation manner, according to the air interface connection status reported by the access network device, the data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication.

In a possible implementation, the method further includes: the network device sending an air interface connection status report indication to the first access network device, where the air interface connection status report indication is used to indicate that the air interface is reported in real time. The connection state or the event of the air interface connection is reported according to an event. In this implementation manner, when receiving the air interface connection status reported by the access network device, the network device may send an air interface connection status report indication to the access network device. It can be reported in real time, or it can be triggered according to the event.

In another possible implementation manner, the network device is a user plane function network element, and the air interface connection state reporting indication is carried in a downlink data packet header sent to the first access network device.

In a further possible implementation, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the first access network device. In this implementation manner, the air interface connection state is carried in the data packet header, which is simple to implement.

In another possible implementation, the determining, by the network device, the data offloading policy according to the air interface connection state, includes: determining, according to the air interface connection status reported by the first access network device, the first access mode When the data to be sent cannot be completely carried, the network device determines the amount of data that is jointly carried by the first access mode and the second access mode, where the first access mode is the first access The access technology corresponding to the network access device, where the second access mode is an access technology corresponding to the second access network device. In this implementation manner, the amount of data commonly carried by the first access mode and the second access mode may be accurately determined according to the air interface connection state.

In another possible implementation manner, the air interface connection status includes at least one of the following information: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein, the amount of data carried by the first access mode is smaller than The air interface bandwidth corresponding to the first access mode; and/or the amount of data carried by the first access mode is reduced if the air interface packet loss rate reported by the first access mode is greater than the first set value. And a second set value; and/or if the air interface queue delay reported by the first access mode is greater than a third set value, the amount of data carried by the first access mode is decreased by a fourth set value. In this implementation manner, the air interface bandwidth, the air interface packet loss rate, and/or the air interface queue delay are factors that need to be considered for data offloading. According to any one or any two or three of the three factors, the traffic splitting strategy can be accurately determined. .

With reference to an aspect and another aspect of the present application, in a possible implementation manner, if the air interface connection status reporting indication is used to indicate that the air interface connection status is triggered according to an event, the event includes: according to an air interface connection status. The reporting threshold is reported or reported according to the setting indication. The air interface connection state reporting threshold includes the following thresholds of at least one parameter: air interface bandwidth, air interface packet loss rate, and air interface queue delay. In this implementation manner, the air interface connection status is reported according to the air interface connection status reporting threshold, and the network device also needs to indicate the air interface connection status reporting threshold to the access network device.

With reference to an aspect of the present application and another aspect, in another possible implementation, the network device is a session management function network element, and the method further includes: the network device sending the offload policy to a user plane Functional network element. In this implementation manner, the session management function network element receives the air interface connection status reported by the access network element through the control plane signaling, and the session management function network element parses the air interface connection status, and determines a data offload policy according to the air interface connection status. The data offloading policy is sent to the user plane function network element, and the user plane function network element performs the data offloading strategy.

With reference to an aspect and another aspect of the present application, in still another possible implementation, the method further includes: the network device receiving a session establishment request from the second access network device, where The session establishment request is used to request to establish a session connection of the second access mode, and the network device and the terminal device have a session connection of the first access mode; and the network device determines to perform data offloading. In this implementation manner, in a case where an access network device has established an access mode session connection, the network device establishes a session connection with another access network device, and the network device determines to perform data offloading.

In conjunction with an aspect of the present application and another aspect, in a further possible implementation, the first access mode is 3GPP partner 3GPP access, and the second access mode is non-3GPP access The first access mode is a non-3GPP access, and the second access mode is a 3GPP access. In this implementation, two access methods are provided.

With reference to an aspect and another aspect of the present application, in a further possible implementation, the method further includes: sending, according to the data offloading policy, the to-be-sent data to the first access network a device and the second access network device. In this implementation manner, according to the determined data offloading policy, the data transmission congestion can be avoided to achieve smooth communication.

In yet another aspect of the present application, a network device is provided, the network device having a function of implementing network device behavior in the above method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

Based on the same inventive concept, the principle and the beneficial effects of the device can be referred to the method embodiments of the foregoing possible network devices and the beneficial effects thereof. Therefore, the implementation of the device can refer to the implementation of the method, and the repetition is not Let me repeat. In yet another aspect of the present application, a communication system is provided, including the network device and the access network device described above.

Yet another aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Yet another aspect of the present application provides a communication chip in which instructions are stored that, when run on a network device or an access network device, cause the computer to perform the methods described in the various aspects above.

Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

2 is a schematic structural diagram of a next generation communication system according to an example of an embodiment of the present invention;

FIG. 3 is a schematic diagram of an interaction process of a communication method according to an embodiment of the present disclosure;

4 is a specific message/signaling interaction flowchart according to the communication method example shown in FIG. 3;

FIG. 5 is another specific message/signaling interaction flowchart according to the communication method example shown in FIG. 3; FIG.

FIG. 6 is a schematic diagram of an interaction process of another communication method according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of a module of a network device according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of another network device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of hardware of a network device according to an embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention. The communication system according to the embodiment of the present invention mainly includes: at least two access network devices (the first access network device 100 and the second connection are illustrated in FIG. 1 ) The network access device 200) and the network device 300. The communication system of the embodiments of the present invention may include more access network devices. Each access network device corresponds to one access mode.

Taking the next generation communication system as an example, FIG. 2 is a schematic structural diagram of a next generation communication system according to an example of an embodiment of the present invention. In FIG. 2, in the 3GPP access mode, the access network device in FIG. 1 is called a radio access network (RAN); in the N3G access mode, the access network device is called access. An access network (AN) or a non-3gpp interworking function (N3IWF). The network device in FIG. 1 may be a session management function entity or a user plane function entity herein. The communication system further includes: an access and mobility management function (AMF) and a policy control function (PCF). The terminal device accesses the network through the access network device, and the AMF is mainly responsible for access management of the terminal device; the user plane function entity is mainly responsible for packet data packet forwarding, QoS control, accounting information statistics, etc.; the session management function entity is responsible for performing Unified session management. In FIG. 2, other functional entities may also be included, and only a few functional entities involved in the present application are highlighted herein. The entities are connected by an Nx interface (for example, N1, N2, etc. in the figure).

It should be noted that the session management function entity and the user plane function entity are only one name, and the name itself does not limit the entity. For example, the session management function entity may also be replaced with a "session management function" or other name. Moreover, the session management function entity may also correspond to an entity including other functions in addition to the session management function. The user plane function entity may also be replaced with a "user plane function" or other name, and the user plane function entity may also correspond to an entity including other functions in addition to the user plane function. A unified explanation is given here, and will not be described below.

The specific function node or the network element in the foregoing system may be implemented by one entity device or may be implemented by multiple entity devices in a specific implementation manner, which is not specifically limited in this embodiment of the present invention. That is, it can be understood that any one of the foregoing functional nodes or network elements may be a logical functional module in the physical device, or may be a logical functional module composed of multiple physical devices. This example does not specifically limit this.

In addition, the communication system also relates to a terminal device (not shown) connected to the access network device. The terminal device in the present application is a device with wireless transceiving function that can be deployed on land, including indoor or outdoor, handheld, wearable or on-board; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air ( Such as airplanes, balloons and satellites, etc.). The terminal device may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The embodiment of the present application does not limit the application scenario. A terminal device may also be referred to as a user equipment (UE), an access terminal device, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, Wireless communication device, UE proxy or UE device, and the like.

It should be noted that the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. "Multiple" means two or more, and in view of this, "a plurality" may also be understood as "at least two" in the embodiment of the present invention. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

The embodiment of the invention provides a communication method and device. According to the air interface connection status reported by the access network device, the data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication.

FIG. 3 is a schematic diagram of an interaction process of a communication method according to an embodiment of the present invention, which can be applied to the foregoing communication system. The method can include the following steps:

S101. The second access network device sends a session establishment request to the network device, where the network device receives a session establishment request from the second access network device, where the session establishment request is used to request to establish a second access. A session connection of the mode, the network device and the terminal device have a session connection of the first access mode.

In this embodiment, it is assumed that the first access network device has established a session connection with the network device by using the first access mode. However, in a place where the signal coverage of the first access network device is limited (such as indoors, underground, etc.), the air interface bandwidth is attenuated, resulting in data transmission congestion, which ultimately results in a poor user experience. Therefore, it is necessary to establish a session connection of other access modes to share the transmitted data. Therefore, the terminal device sends a session establishment request to the second access network device, and the second access network device sends the session establishment request to the network device, and the network device receives the session establishment request. In a specific implementation, the session establishment request may be sent to the network device through the AMF. Specifically, the second access network device sends a session establishment request to the AMF. After receiving the session establishment request, the AMF determines whether the session establishment request is a new session establishment request. If it is determined that it is a new session establishment request, it is determined that the terminal device desires to perform data offloading, and the AMF sends the session establishment request to the SMF, and carries a bypass indicator in the session establishment request.

The first access mode may be a 3GPP access, the second access mode may be a non-3GPP access, or the first access mode is a non-3GPP access, and the second access mode is a 3GPP access. The 3GPP access technology can be the fourth generation (4G) access, or 5G access, or other 3GPP access technologies; the non-3GPP access technology can be wireless fidelity (wifi). The access may be a wireless local area network (WLAN) access, or may be other non-3GPP access technologies, which is not limited in this application.

S102. The network device determines to perform data offloading.

The SMF detects, according to the offloading identifier, whether the terminal device has established a session connection of the first access mode. If the SMF detects that the terminal device has established a session connection of the first access mode, it determines to perform data offloading.

It should be noted that the establishment of the session by the second access network device may be established before the policy for determining the offload, and the determination of the data offload may also be confirmed before the policy for determining the offload. Therefore, steps S101 and S102 are optional and are indicated by dashed lines in the figure.

S103: The network device sends an air interface connection status report indication to the at least two access network devices, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is triggered according to an event. The at least two access network devices respectively receive an air interface connection status reporting indication from the network device.

To determine the data offloading, a certain shunting strategy is required. Otherwise, the shunting is performed arbitrarily. For example, the second access network device that newly establishes the session connection itself has a large load. If the data that cannot be carried by the device is carried, the data is diverted. The congestion of an access network device, but the second access network device may be congested because it carries the offloaded data. According to the air interface connection status of each access mode, the traffic off policy can be determined in real time and in reality.

The air interface connection status includes at least one of the following information: air interface bandwidth, air interface packet loss rate, and air interface queue delay.

The network device needs to indicate that the first access network device and the second access network device report the air interface connection status. Therefore, the air interface connection status reporting indication is sent to the two access network devices. It should be noted that at least two access network devices herein may be two access network devices, or may be two or more access network devices. The air interface connection status reporting indication may be sent separately; if the network device is UPF, the air interface connection status reporting indication may be carried in the downlink data packet header sent to the access network device. The mode of reporting the air interface connection status or the reporting policy includes: real-time reporting and triggering reporting according to the event. Real-time reporting, that is, reporting from time to time or timing. The method of real-time reporting is simple, which can save the indication overhead, but may cause frequent reporting or fail to meet the requirements of the shunt. Specifically, the air interface connection status reporting indication may be an air interface connection status reporting identifier. The air interface connection status reporting status is different from the real-time reporting and event triggering reporting, and is used to indicate that the access network device reports the air interface connection status by using the reporting policy. For example, when the reporting policy includes real-time reporting and event-triggered reporting, the identifier may be a binary number. For example, if the identifier is “0”, the access network device is instructed to report the air interface connection status in real time; if the identifier is “1”, the access is indicated. The network device reports the air interface connection status according to the event. According to the event triggering report, effective reporting and effective diversion can be realized.

As a further implementation, if the air interface connection status reporting indication is used to indicate that the air interface connection status is reported according to an event, the event includes reporting according to the air interface connection status reporting threshold or reporting according to the setting indication; The threshold for reporting the air interface connection status includes the thresholds of at least one of the following parameters: air interface bandwidth, air interface packet loss rate, and air interface queue delay. The event triggering report is reported according to the setting indication, and the setting indication may be a dual connection indication, or may be other indications. For example, the UPF senses the dual connectivity state, and sends the reporting indication to the access network device by carrying a reporting indication in the N3 packet header. If the report is triggered by the event, the report is sent according to the air interface connection status, and the report threshold is also required to be sent in the report. When the air interface connection status reaches the corresponding threshold, the air interface connection status is triggered.

As an alternative to the S103, the air interface connection status reporting indication (which may also include the reporting threshold) may be pre-configured, and the access network device performs the pre-configuration, for example, real-time reporting or triggering the air interface connection status according to the event.

S104. The at least two access network devices respectively send respective air interface connection states to the network device. The network device receives the air interface connection status reported by the at least two access network devices.

As an implementation manner, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the at least two access network devices. Specifically, for example, the air interface connection status information is embedded in the uplink packet N3 header, or the air interface connection status information is carried in the uplink data packet TCP or IP header optional field. The implementation does not need to transmit the air interface connection state in a new message format, and the implementation is simple. After receiving the air interface connection status, the UPF can parse the air interface connection status in the packet header of the uplink data packet.

As another implementation manner, the network device is a session management function network element. The method further includes: the network device sending the offloading policy to a user plane function network element. In this implementation manner, the access network device sends the air interface connection status to the SMF through independent air interface connection status reporting signaling (control signaling). Although the report signaling is reported to the air interface connection state separately, the implementation complexity is increased, but the separate report signaling also increases the scalability and applicability in the reporting mechanism. Because the air interface connection status reporting signaling is a type of control signaling, the SMF can read the air interface connection status included in the control signaling.

S105. The network device determines, according to the air interface connection status, a data offloading policy, where the data offloading policy is used to send data to be sent to the first access network device and the second access network device. Strategy.

If the UPF is in the state of receiving the air interface connection, the UPF determines the data offloading policy according to the air interface connection status; if the SMF is in the air interface connection state, the SMF determines the data offload policy according to the air interface connection status, and the offloaded The policy is sent to UPF.

Further, S105 includes: determining, according to the air interface connection status reported by the first access network device and the air interface connection status reported by the second access network device, the data volume of the first access mode and the second access mode The first access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.

Further, the traffic splitting strategy includes: the amount of data carried by the access mode with a large air interface bandwidth is greater than the data amount of the access mode with a small air interface bandwidth; and/or the data volume of the access mode with a large packet loss rate is smaller than The amount of data carried by the access mode with a small packet loss rate; and/or the amount of data carried by the access mode with a large air interface queue delay is smaller than the amount of data carried by the access mode with a small air interface queue delay.

In the specific implementation, for example:

If the air interface connection status is the air interface bandwidth, the UPF uses the total amount of downlink data to be sent to compare with the bandwidth of the 3GPP side air interface. If the bandwidth value is smaller than the total amount of downlink data to be sent, the UPF sends the data amount smaller than the current bandwidth on the 3GPP side. The total amount of downlink data is transmitted on the Non-3GPP side minus the amount of transmitted data on the 3GPP side.

For example, if the received air interface connection status is the air interface bandwidth, the UPF may also select to obtain the air interface bandwidth value of the 3GPP and non-3GPP sides, and allocate the data amount sent by the 3GPP side and the non-3GPP side based on the bandwidth ratio.

If the air interface connection status is the air interface packet loss rate, when the packet loss rate of the 3GPP side or the non-3GPP side is greater than the threshold, the UPF halve or reduce the amount of data carried by the access mode by an arbitrary amount, and reduces the amount. The amount of data is carried by another access method.

If the air interface connection status is the air interface loss rate, the UPF determines whether the current access mode packet loss is a random packet loss based on the packet loss rate. If it is a random packet loss, the amount of transmitted data remains unchanged. Otherwise, the UPF halve or reduce the amount of data carried by the access mode by an arbitrary amount, and the reduced amount of data is carried by another access mode.

If the air interface connection status is the air interface queue delay, when the queue delay on the 3GPP or N3G side is higher than the threshold, the UPF halved or reduced the amount of data in the access mode with a higher queue delay, and reduces the data. The amount is carried by another access method.

Of course, the above splitting scheme is only an example, and may not be limited to the above splitting scheme.

S106. Send the to-be-sent data to the first access network device and the second access network device according to the data offloading policy.

The policy of performing the offloading by the UPF specifically performs the offloading of the data to be sent.

According to the communication method provided by the embodiment of the present invention, according to the air interface connection status reported by each access network device that has a session connection, the data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication.

4 is a specific message/signaling interaction flowchart according to the communication method example shown in FIG. 3. In this embodiment, the network element or functional entity involved includes RAN, N3IWF, AMF, SMF, PCF, and UPF. .

In this embodiment, the terminal device has accessed from the 3GPP or Non-3GPP (Non-3GPP in this embodiment) access network, and establishes a session connection with the core network, and will try to use 3GPP or Non-3GPP. A new connection is established by the access mode (3GPP in this embodiment) in which the connection has not been established. At this time, the air interface connection status reporting and traffic off function has not been enabled on the Non-3GPP side. For ease of description, the process of establishing a new connection will be marked as a process (eg, 201a, 202a..), and the process of modifying an existing connection is marked as a b process (eg, 206b).

The process can include the following message/signaling interactions:

S201a. The terminal device initiates a packet data unit (PDU) session establishment procedure on the 3GPP side that does not establish a session connection, and sends a PDU session establishment request to the AMF. The PDU session establishment request is a non access stratum (NAS) message. The NAS message contains some information necessary to establish a PDU session. The RAN receives the session establishment request of the terminal device and sends it to the AMF. The AMF receives the session establishment request sent by the RAN.

S202a. The AMF determines, according to the content of the NAS message, whether the NAS message is a new PDU session request. In the case of a new PDU session, the AMF selects the SMF of one of the services in multiple SMFs (SMF(s)) according to the rules established by the standard.

S203a. The AMF sends a new session request message (transmitted through the N11 interface, that is, the N11 message) to the SMF, where the message includes a request for creating a PDU session. In this embodiment, the AMF adds a traffic off identifier to the N11 message sent to the SMF. The shunt identifier can be a few binary digits. The SMF receives the N11 message sent by the AMF.

S204a. After receiving the offloading identifier sent by the AMF, the SMF determines whether the terminal device has established a connection on the Non-3GPP side. If yes, the following process is performed: the SMF initiates a packet data unit-connectivity access network (PDU-CAN) session establishment process to the PCF, requests an air interface connection status report indication, and includes a traffic distribution identifier in the message. Otherwise, it is processed according to the standard PDU session establishment process. The PCF receives the PDU-CAN session setup message sent by the SMF.

S205a, after receiving the message sent by the SMF, the PCF sends an air interface connection status report indication. The SMF receives the air interface connection status report indication sent by the PCF. Specifically, the air interface connection status reporting indication may be an air interface connection report (Air Interface Condition Report) allocated by the PCF to the PDU session according to a predetermined rule. The air interface connection status reporting status corresponds to a real-time report and an event-triggered report, such as a report or report mode, and is used to indicate that the access network device reports the air interface connection status by using the reporting policy. For example, when the reporting policy includes real-time reporting and event-triggered reporting, the identifier may be a binary number. For example, if the identifier is “0”, the access network device is instructed to report the air interface connection status in real time; if the identifier is “1”, the access is indicated. The network device reports the air interface connection status according to the event. Further, the triggering of the event according to the event includes reporting according to the air interface connection status reporting threshold or reporting according to the setting indication. Further, when the reporting policy is triggered by the threshold, the air interface connection status reporting indication further includes a bandwidth threshold, a queue delay threshold, or a packet loss threshold.

S206a. The SMF sends a session establishment request response message to the RAN through the AMF. The RAN receives the response message sent by the SMF. The response message includes an air interface connection status reporting indication obtained by the SMF from the PCF. Specifically, the air interface connection status reporting indication may be an air interface connection status reporting identifier; and if the reporting is triggered according to the threshold, the reporting indication further includes a threshold of the at least one parameter described above.

When the RAN receives the report identifier, it reports the air interface connection status according to the identifier information. Alternatively, when the current state of the RAN meets the reporting trigger condition, the RAN performs an air interface connection status report.

S206b. At this time, the reporting mechanism of the PDU session established by the terminal device on the Non-3GPP side has not been started yet. In order to enable reporting on the Non-3GPP side, the SMF initiates a packet data unit session modification (PDU session modification) procedure for the PDU connection in the Non-3GPP access mode of the terminal device. That is, the SMF sends a session modification message to the N3IWF, and the N3IWF receives the session modification message. The session modification message also includes the air interface connection status report identifier and the optional bandwidth threshold, the queue delay threshold, or the packet loss threshold, which are allocated by the PCF for the terminal device.

S207: The SMF carries the offloading identifier in the N4 interface message sent to the UPF, and the UPF is required to parse the air interface connection state information included in the uplink data packet header. The UPF receives the N4 message. Therefore, the UPF parses the specified PDU session header and obtains an air interface connection status.

S208. The RAN sends a PDU session accept message to the terminal device. The terminal device receives the PDU session accept message.

So far, the session connection between the two access modes of 3GPP and Non-3GPP has been established, and the terminal device can perform data transmission through the UPF and the network through the two access modes. When the air interface connection status of a certain access mode is poor (beyond the set threshold), or when the access network device receives the setting indication, or the access network device reports the air interface connection status in real time, the following process is performed:

S209, the RAN and the N3IWF respectively report the air interface connection status to the UPF. The UPF receives the air interface connection status reported by the RAN and the N3IWF respectively.

The specific reporting method includes the following solutions:

1) Embed the air interface connection status in the N3 header of the uplink packet message.

2) Carrying an air interface connection state in an optional field of an uplink data transmission control protocol (TCP) or an Internet Protocol (IP) header.

S210: The UPF obtains an air interface connection state in the data packet header, and the UPF determines a data offload policy based on the air interface state, and performs data offload according to the traffic off policy. For example, when the air interface connection status on the 3GPP side is poor, the downlink data originally carried by the 3GPP is jointly carried by the 3GPP and the Non-3GPP.

Both the RAN and the N3IWF report the air interface connection status, which enables the UPF to determine the traffic distribution policy more accurately, without alleviating the data transmission congestion of the access mode on the side where the air interface connection is poor, and making another access. The data transmission of the mode is congested, and the traffic can be split evenly.

S211a, when the last PDU session on the 3GPP side is to perform a de-registration process, the AMF notifies the SMF to deliver the session modification process, and cancels the air interface connection status reporting behavior of all the PDU connections of the terminal device.

S211b, in the same way, when the last PDU session on the Non-3GPP side is also in the process of performing the de-registration process, the AMF notifies the SMF to deliver the session modification process, and cancels the air interface connection status reporting behavior of all the PDU connections of the terminal device.

According to the communication method provided by the embodiment of the present invention, according to the air interface connection status reported by each access network device, the data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication; and the air interface is carried in the uplink data packet header. The connection state does not require an additional message to report the air interface connection status, which is simple to implement.

FIG. 5 is another specific message/signaling interaction flowchart according to the example of the communication method shown in FIG. 3, which is different from the embodiment shown in FIG. 4 in that S309, RAN and N3 IWF pass control signaling. The air interface connection status is sent to the SMF, that is, the air interface connection status is no longer carried in the data packet header, and the SMF receives the air interface connection status reported by the RAN and the N3IWF respectively; the SMF determines the traffic split policy according to the air interface connection status, and then, at S310, the SMF will be offloaded. The policy and offload identity are sent to the UPF for execution. In addition, in S307, the offloaded identifier may be carried in the N4 interface message, and the offloaded identifier may not be carried. If the offloaded identifier is not carried in S307, the offloaded identifier needs to be carried in S310.

According to the communication method provided by the embodiment of the present invention, according to the air interface connection status reported by each access network device that has a session connection, a data offloading policy can be determined to avoid data transmission congestion, so as to achieve smooth communication; and a separate letter is obtained. The reporting of the air interface connection status increases the scalability and applicability of the reporting mechanism.

FIG. 6 is a schematic diagram of an interaction process of another communication method according to an embodiment of the present invention, which can be applied to the foregoing communication system. The method can include the following steps:

S401. The second access network device sends a session establishment request to the network device, where the network device receives a session establishment request from the second access network device, where the session establishment request is used to request to establish a second access. A session connection of the mode, the network device and the terminal device have a session connection of the first access mode.

S402. The network device determines to perform data offloading.

Steps S401 to S402 are the same as steps S101 to S102 of the embodiment shown in FIG. 3, and details are not described herein again.

S403, the network device sends an air interface connection status report indication to the first access network device, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is reported and triggered according to an event.

In this embodiment, when the air interface connection status of the first access network device is poor, or when the first access network device receives the setting indication, or the first access network device follows the preset or received indication. Report the air interface connection status in real time. That is, the embodiment considers that the air interface connection state is reported by the first access network device only because the air interface connection state of the first access network device is poor or the first access mode is a priority access mode. The air interface connection status is reported only by the first access network device, which can save signaling overhead.

S404. The network device receives an air interface connection status reported by the first access network device.

As an implementation manner, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the at least two access network devices. For example, the reporting process of S209 in Fig. 4 is employed.

As another implementation manner, the network device is a session management function network element. The method further includes: the network device sending the offloading policy to a user plane function network element. In this implementation manner, the access network device sends the air interface connection status to the SMF through independent air interface connection status reporting signaling (control signaling). For example, the reporting process of S309 in Fig. 5 is employed.

S405, the network device determines, according to the air interface connection status, a data offloading policy, where the data offloading policy is used to send the to-be-sent data to the first access network device and the second access network device. The policy, the first access network device and the second access network device have a session connection with the network device.

Further, S405 includes: determining, by the first access mode, that the first access mode cannot completely carry the to-be-sent data according to the air interface connection status reported by the first access network device, where the network device determines, by the first access mode The amount of data that is shared by the second access mode, where the first access mode is an access technology corresponding to the first access network device, and the second access mode is the second access mode. Access technology corresponding to the network device.

Further, the offloading policy may be that the amount of data carried by the first access mode is smaller than the air interface bandwidth corresponding to the first access mode; and/or if the air interface reported by the first access mode is lost. The packet rate is greater than the first set value, and the amount of data carried by the first access mode is decreased by a second set value; and/or if the air interface queue delay reported by the first access mode is greater than the third setting a value that reduces the amount of data carried by the first access mode by a fourth set value.

S406. Send the to-be-sent data to the first access network device and the second access network device according to the data offloading policy.

According to the communication method provided by the embodiment of the present invention, according to the air interface connection status reported by the access network device with poor air interface connection status, the data offloading policy can be determined to avoid data transmission congestion of the access network device, so as to achieve smooth communication. .

The above describes the method of the embodiment of the present invention in detail, and the apparatus of the embodiment of the present invention is provided below.

The embodiment of the present application may perform the division of the function module on the terminal device or the network device according to the foregoing method. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions.

FIG. 7 is a schematic diagram of a module of a network device according to an embodiment of the present disclosure, where the network device may be a network device in the foregoing communication system. The network device may include a receiving unit 72 and a determining unit 73, and may further include a transmitting unit 71 and a shunting unit 74. among them:

The receiving unit 72 is configured to receive the air interface connection status reported by the at least two access network devices.

a determining unit 73, configured to determine a data offloading policy according to the air interface connection state, where the data offloading policy is used to send data to be sent to the first access network device and the second access network device Strategy.

Further, in an implementation manner, the network device further includes: a sending unit 71, configured to send an air interface connection status reporting indication to the at least two access network devices, where the air interface connection status reporting indication is used to indicate real-time The air interface connection status is reported or the air interface connection status is reported according to an event.

In another implementation, if the air interface connection status reporting indication is used to indicate that the air interface connection status is reported according to an event, the event is reported according to the air interface connection status reporting threshold or reported according to the setting indication; The air interface connection state reporting threshold includes the following thresholds of at least one parameter: air interface bandwidth, air interface packet loss rate, and air interface queue delay.

In still another implementation manner, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the at least two access network devices.

In a further implementation, the network device is a session management function network element, and the sending unit 71 is further configured to send the traffic off policy to the user plane function network element.

In a further implementation, the receiving unit 72 is further configured to receive a session establishment request from the second access network device, where the session establishment request is used to request to establish a session connection of the second access mode. The network device and the terminal device have a session connection of the first access mode;

The determining unit 73 is further configured to determine to perform data offloading.

In a further implementation, the determining unit 73 is specifically configured to:

Determining, according to the air interface connection status reported by the first access network device and the air interface connection status reported by the second access network device, the data volume of the first access mode and the second access mode bearer, where An access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.

In another implementation manner, the air interface connection status includes at least one of the following information: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein, the access mode with a large air interface bandwidth carries a larger amount of data than the air interface bandwidth. The amount of data carried by the inbound mode; and/or the amount of data carried by the access mode with a large packet loss rate is smaller than the amount of data carried by the access mode with a small packet loss rate; and/or the data carried by the access mode with a large air interface queue delay The amount of data carried by the access mode that is smaller than the air interface queue delay is small.

In a further implementation, the first access mode is a 3GPP access, the second access mode is a non-3GPP access, or the first access mode is a non-3GPP access, and the second access The incoming mode is 3GPP access.

In a further implementation, the network device further includes: a splitting unit 74, configured to send the to-be-sent data to the first access network device and the second interface according to the data offloading policy Network access equipment.

For a specific implementation of the units of the network device, reference may be made to the description of the method embodiments shown in FIG. 3 to FIG. 6 , and details are not described herein again.

According to the network device provided by the embodiment of the present invention, according to the air interface connection status reported by each access network device that has a session connection, the data offloading policy can be determined to avoid data transmission congestion, so as to implement unobstructed communication.

FIG. 8 is a schematic diagram of another network device according to an embodiment of the present disclosure. The network device may be a network device in the foregoing communication system. The network device may include a receiving unit 82 and a determining unit 83, and may further include a transmitting unit 81 and a shunting unit 84. among them:

The receiving unit 82 is configured to receive an air interface connection status reported by the first access network device.

a determining unit 83, configured to determine, according to the air interface connection state, a policy of data offloading, where the data offloading policy is used to send data to be sent to the first access network device and the second access network device The policy, the first access network device and the second access network device have a session connection with the network device.

Further, in an implementation manner, the network device further includes: a sending unit 81, configured to send an air interface connection status reporting indication to the first access network device, where the air interface connection status reporting indication is used to indicate real-time The air interface connection status is reported or the air interface connection status is reported according to an event.

In another implementation manner, the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the first access network device.

In a further implementation, the determining unit 83 is specifically configured to:

Determining data jointly carried by the first access mode and the second access mode when determining that the first access mode cannot completely carry the to-be-sent data according to the state of the air interface connection reported by the first access network device And the first access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.

In another implementation, the air interface connection status includes at least one of the following information: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay. The data amount carried by the first access mode is smaller than the first The air interface bandwidth corresponding to the access mode; and/or if the air interface packet loss rate reported by the first access mode is greater than the first set value, the amount of data carried by the first access mode is decreased by the second setting. And if the air interface queue delay reported by the first access mode is greater than the third set value, the amount of data carried by the first access mode is decreased by a fourth set value.

In a further implementation, the network device is a session management function network element, and the sending unit 81 is further configured to send the traffic offloading policy to the user plane function network element.

In still another implementation, the receiving unit 82 is further configured to receive a session establishment request from the second access network device, where the session establishment request is used to request to establish a session connection of the second access mode. The network device and the terminal device have a session connection of the first access mode;

The determining unit 83 is further configured to determine to perform data offloading.

In a further implementation, the first access mode is a 3GPP access, the second access mode is a non-3GPP access, or the first access mode is a non-3GPP access, and the second The access mode is 3GPP access.

In a further implementation, the network device further includes: a splitting unit 84, configured to send the to-be-sent data to the first access network device and the second interface according to the data offloading policy Network access equipment.

For a specific implementation of the units of the network device, reference may be made to the description of the method embodiment shown in FIG. 4, and details are not described herein again.

According to the network device provided by the embodiment of the present invention, according to the air interface connection status reported by the access network device with poor air interface connection status, the data offloading policy can be determined to avoid data transmission congestion of the access network device, so as to achieve smooth communication. .

The embodiment of the present invention further provides a network device, which may be a network device in the foregoing communication system, and the network device may adopt the hardware architecture shown in FIG. The network device can include a receiver, a transmitter, a memory, and a processor, the receiver, the transmitter, the memory, and the processor being connected to each other by a bus. The related functions implemented by the transmitting unit 71 in FIG. 7 may be implemented by a transmitter, and the related functions implemented by the receiving unit 72 may be implemented by a receiver, and the related functions implemented by the determining unit 73 and the branching unit 74 may pass through one or Implemented by multiple processors.

The memory includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read only memory (EPROM), or a portable A compact disc read-only memory (CD-ROM) for use in related instructions and data.

The receiver is for receiving data and/or signals, and the transmitter is for transmitting data and/or signals. The transmitter and receiver can be stand-alone devices or a single device.

The processor may include one or more processors, for example, including one or more central processing units (CPUs). In the case where the processor is a CPU, the CPU may be a single-core CPU or may be Multi-core CPU.

Specifically, the receiver is configured to receive an air interface connection status reported by the at least two access network devices, for example, perform the foregoing part of S104, and further, receive a session establishment request from the second access network device, for example, execute the foregoing S101. The processor is configured to determine a data offloading policy according to the air interface connection state, for example, to perform a part of the foregoing S105, and also to determine to perform data offloading, for example, to perform the foregoing part of S102; the transmitter is configured to Transmitting, by the at least two access network devices, an air interface connection status reporting indication, for example, performing the foregoing part of S103, and also for transmitting the to-be-sent data to the first access network device according to the data offloading policy And the second access network device, for example, performing the above-described portion of S106. For specific implementation, please refer to the description of the above method embodiment.

The embodiment of the present invention further provides a network device, which may be a network device in the foregoing communication system, and the network device may adopt the hardware architecture shown in FIG. The network device can include a receiver, a transmitter, a memory, and a processor, the receiver, the transmitter, the memory, and the processor being connected to each other by a bus. The related functions implemented by the transmitting unit 81 in FIG. 8 may be implemented by a transmitter, and related functions implemented by the receiving unit 82 may be implemented by a receiver, and related functions implemented by the determining unit 83 and the branching unit 84 may be performed by one or Implemented by multiple processors.

The memory includes, but is not limited to, RAM, ROM, EPROM, CD-ROM, which is used for related instructions and data.

The processor may include one or more processors, for example, including one or more CPUs. In the case where the processor is a CPU, the CPU may be a single core CPU or a multi-core CPU.

Specifically, the receiver is configured to receive an air interface connection status reported by the first access network device, for example, perform the foregoing part of S404, and further, receive a session establishment request from the second access network device, for example, perform the foregoing S401. The processor is configured to determine a data offloading policy according to the air interface connection state, for example, to perform a part of the foregoing S405, and also to determine to perform data offloading, for example, to perform the foregoing part of S402; the transmitter is used to The first access network device sends an air interface connection status report indication, for example, performs the foregoing part of S403, and is further configured to send the to-be-sent data to the first access network device according to the data offloading policy. And the second access network device, for example, the portion of S406 described above. For specific implementation, please refer to the description of the above method embodiment.

It will be appreciated that Figure 9 only shows a simplified design of the network device. In practical applications, the network device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all network devices that can implement the embodiments of the present invention are in the present invention. Within the scope of protection.

For the explanation and beneficial effects of the related content in any of the above-mentioned communication devices, reference may be made to the corresponding method embodiments provided above, and details are not described herein again. Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The embodiment of the invention further provides a computer storage medium for storing computer software instructions for use in a network device, which comprises a program designed to execute the above method embodiment.

The embodiment of the invention further provides a computer program product for storing computer software instructions for use in a network device, comprising a program designed to execute the above method embodiment.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs or code). When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted by a computer readable storage medium. The computer instructions may be from a website site, computer, server or data center via a wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Another website site, computer, server, or data center for transmission. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)). )Wait.

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included. The foregoing storage medium includes: a read-only memory (ROM) or a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code.

Claims

A communication method, comprising:

The network device receives the air interface connection status reported by the at least two access network devices;

The network device determines a policy for data offloading according to the air interface connection state, where the data offloading policy is used to indicate a policy for sending data to be sent to the first access network device and the second access network device.
The method of claim 1 wherein the method further comprises:

The network device sends an air interface connection status report indication to the at least two access network devices, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is reported and triggered according to an event.
The method according to claim 1 or 2, wherein the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the at least two access network devices. .
The method according to any one of claims 1 to 3, wherein the network device determines a data offloading policy according to the air interface connection state, including:

Determining, according to the air interface connection status reported by the first access network device and the air interface connection status reported by the second access network device, the data volume of the first access mode and the second access mode bearer, where An access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.
The method according to claim 4, wherein the air interface connection status comprises at least one of the following: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein the data volume carried by the access mode with a large air interface bandwidth is The amount of data carried by the access mode that is larger than the bandwidth of the air interface; and the data volume carried by the access mode with a large packet loss rate is smaller than the data volume of the access mode with a small packet loss rate; and/or the air interface queue delay is large. The amount of data carried in the access mode is smaller than the amount of data carried in the access mode with a small air interface queue delay.
A communication method, comprising:

The network device receives the air interface connection status reported by the first access network device;

Determining, by the network device, a policy of data offloading according to the air interface connection state, where the data offloading policy is used to indicate a policy for sending data to be sent to the first access network device and the second access network device, The first access network device and the second access network device have a session connection with the network device.
The method of claim 6 wherein the method further comprises:

The network device sends an air interface connection status report indication to the first access network device, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is reported according to an event trigger.
The method according to claim 6 or 7, wherein the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the first access network device.
The method according to any one of claims 6 to 8, wherein the network device determines a data offloading policy according to the air interface connection state, including:

When the first access mode cannot completely carry the to-be-sent data according to the air interface connection status reported by the first access network device, the network device determines, by the first access mode and the second access mode, The amount of data that is jointly carried, wherein the first access mode is an access technology corresponding to the first access network device, and the second access mode is an access corresponding to the second access network device technology.
The method according to claim 9, wherein the air interface connection status comprises at least one of the following: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein the data carried by the first access mode The quantity is smaller than the air interface bandwidth corresponding to the first access mode; and/or the amount of data to be carried by the first access mode if the air interface packet loss rate reported by the first access mode is greater than the first set value. Decrease the second set value; and/or if the air interface queue delay reported by the first access mode is greater than the third set value, the amount of data carried by the first access mode is decreased by the fourth set value. .
The method according to claim 2 or 7, wherein, if the air interface connection status reporting indication is used to indicate that the air interface connection status is reported and triggered according to an event, the event includes reporting according to an air interface connection status reporting threshold or The reporting of the air interface connection status includes the following thresholds of at least one parameter: air interface bandwidth, air interface packet loss rate, and air interface queue delay.
The method according to claim 1 or 6, wherein the network device is a session management function network element;

The method further includes: the network device sending the offloading policy to a user plane function network element.
The method of any of claims 1 to 12, further comprising:

The network device receives a session establishment request from the second access network device, where the session establishment request is used to request to establish a session connection of the second access mode, and the network device and the terminal device already have the first Session connection for access mode;

The network device determines to perform data offloading.
The method according to claim 4 or 9, wherein the first access mode is a third generation partnership plan 3GPP access, the second access mode is non-3GPP access; or the One access mode is non-3GPP access, and the second access mode is 3GPP access.
The method of any of claims 1 to 14, wherein the method further comprises:

And sending the to-be-sent data to the first access network device and the second access network device according to the data offloading policy.
A network device, comprising:

a receiving unit, configured to receive an air interface connection status reported by the at least two access network devices;

a determining unit, configured to determine a data offloading policy according to the air interface connection state, where the data offloading policy is used to indicate a policy for sending data to be sent to the first access network device and the second access network device .
The network device according to claim 16, wherein the network device further comprises:

And a sending unit, configured to send an air interface connection status report indication to the at least two access network devices, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is reported according to an event trigger.
The network device according to claim 16 or 17, wherein the network device is a user plane function network element; and the air interface connection state carries a packet header of an uplink data packet from the at least two access network devices. in.
The network device according to any one of claims 16 to 18, wherein the determining unit is specifically configured to:

Determining, according to the air interface connection status reported by the first access network device and the air interface connection status reported by the second access network device, the data volume of the first access mode and the second access mode bearer, where An access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.
The network device according to claim 19, wherein the air interface connection status comprises at least one of the following: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein the data carried by the access mode with a large air interface bandwidth is carried. The amount of data carried by the access mode that is larger than the bandwidth of the air interface; and/or the amount of data carried by the access mode with a large packet loss rate is smaller than the amount of data carried by the access mode with a small packet loss rate; and/or the air interface queue delay is large. The amount of data carried by the access mode is smaller than the amount of data carried by the access mode with a small air interface queue delay.
A network device, comprising:

a receiving unit, configured to receive an air interface connection status reported by the first access network device;

a determining unit, configured to determine a data offloading policy according to the air interface connection state, where the data offloading policy is used to indicate a policy for sending data to be sent to the first access network device and the second access network device The first access network device and the second access network device have a session connection with the network device.
The network device according to claim 21, wherein the network device further comprises:

And a sending unit, configured to send an air interface connection status report indication to the first access network device, where the air interface connection status report indication is used to indicate that the air interface connection status is reported in real time or the air interface connection status is reported according to an event trigger.
The network device according to claim 21 or 22, wherein the network device is a user plane function network element; and the air interface connection state is carried in a packet header of an uplink data packet from the first access network device. .
The network device according to any one of claims 21 to 23, wherein the determining unit is specifically configured to:

Determining data jointly carried by the first access mode and the second access mode when determining that the first access mode cannot completely carry the to-be-sent data according to the state of the air interface connection reported by the first access network device And the first access mode is an access technology corresponding to the first access network device, and the second access mode is an access technology corresponding to the second access network device.
The network device according to claim 24, wherein the air interface connection status comprises at least one of the following: an air interface bandwidth, an air interface packet loss rate, and an air interface queue delay; wherein, the air interface is delayed by the first access mode. The amount of data is smaller than the air interface bandwidth corresponding to the first access mode; and/or the data carried by the first access mode if the air interface packet loss rate reported by the first access mode is greater than the first set value. Decreasing the second set value; and/or if the air interface queue delay reported by the first access mode is greater than the third set value, reducing the amount of data carried by the first access mode by a fourth setting value.
The network device according to claim 17 or 22, wherein, if the air interface connection status reporting indication is used to indicate that the air interface connection status is reported according to an event, the event includes reporting according to an air interface connection status reporting threshold. Or reporting according to the setting indication; wherein the air interface connection state reporting threshold includes a threshold of at least one of the following parameters: air interface bandwidth, air interface packet loss rate, and air interface queue delay.
The network device according to claim 16 or 21, wherein the network device is a session management function network element, and the sending unit is further configured to send the traffic off policy to the user plane function network element.
The network device according to any one of claims 16 to 27, wherein the receiving unit is further configured to receive a session establishment request from the second access network device, where the session establishment request is In the request to establish a session connection of the second access mode, the network device and the terminal device have a session connection of the first access mode;

The determining unit is further configured to determine to perform data offloading.
The network device according to claim 19 or 24, wherein the first access mode is a third generation partnership plan 3GPP access, and the second access mode is non-3GPP access; or The first access mode is non-3GPP access, and the second access mode is 3GPP access.
The network device according to any one of claims 16 to 29, further comprising: a offloading unit, configured to send the to-be-sent data to the first access network according to the data offloading policy a device and the second access network device.
A communication system, comprising the network device and the access network device according to any one of claims 16 to 30.
A network device comprising: a processor and a memory; the memory for storing computer execution instructions, the processor executing the computer-executed instructions stored by the memory to cause the network when the network device is running The apparatus performs the communication method according to any one of claims 1-5.
A network device comprising: a processor and a memory; the memory for storing computer execution instructions, the processor executing the computer-executed instructions stored by the memory to cause the network when the network device is running The apparatus performs the communication method according to any one of claims 6-15.