WO2021098532A1 - Data processing method and related device - Google Patents

Abstract

Disclosed are a data processing method and a related device, which are used for increasing the network throughput in a dual connectivity scenario. In the embodiments of the present application, a target base station only sends a first message to a network element of a core network after determining that the network element of the core network has completed a bearer change of an inter-station handover, such that the core network establishes, according to the first message, a user plane bearer, between a secondary base station and the network element of the core network, of a terminal that accesses the target base station, that is to say, a flow of adding the secondary base station is initiated by means of the first message once the target base station and the network element of the core network complete the bearer change, thereby avoiding the failure of the target base station adding the secondary base station as a secondary carrier due to the fact that the core network cannot simultaneously process the bearer change of the terminal between the target base station and the secondary base station during the process of processing the bearer change of the inter-station handover, increasing the success rate of adding the secondary carrier, reducing the data handover drop-off delay, and thus increasing the network throughput of a base station after the inter-station handover and improving the user experience.

Description

A data processing method and related equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 18, 2019, the application number is 201911154539.1, and the invention title is "a data processing method and related equipment", the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of communications, and in particular to a data processing method and related equipment.

Background technique

Non-independent networking (NSA, non-standalone) and independent networking (SA, standalone) are two networking configuration forms of 5G air interface (NR, new radio) in the actual network development process. NSA is a networking solution that quickly provides 5G capabilities and can achieve large-scale deployment. Generally speaking, NSA can use dual connectivity (DC, dual connectivity), multi-radio dual connectivity (MR-DC, multi-radio dual connectivity), and evolved terrestrial wireless access (E-UTRA, evolved-UMTS terrestrial radio access). ) And NR dual connectivity (EN-DC, E-UTRA-NR dual connectivity) is realized.

In the prior art, under the NSA architecture, taking EN-DC as an example, the core network is an evolved packet core (EPC) based on the 4G network, which anchors the evolved base station (eNB, evolved) of the 4G network. NodeB) serves as the base station that is the primary carrier for the terminal to access the core network, and the next generation base station (gNB, next-generation-NodeB) serves as the secondary carrier for the terminal to access the core network. As for when to add gNB as a secondary carrier, the eNB can do it according to its own algorithm Determine and send a request to add a secondary carrier to the core network, and then the core network executes the bearer change process of adding a gNB as a secondary carrier for the terminal according to the request. After completing the secondary carrier addition process, the eNB and gNB have a user plane with the EPC through the S1 interface (UP, user plane) connection, but only the eNB has a control plane (CP, control plane) connection with the EPC, and the eNB transmits CP data with the gNB through the X2 interface.

However, when a terminal connected to an eNB triggers inter-station handover due to changes in signal quality, wireless transmission traffic load adjustment, activation operation and maintenance, equipment failure lights, etc., carrier transfer will occur, eNB inter-station handover process and gNB addition The process may conflict. After the eNB switches between stations, the user throughput rate will decrease significantly. Similarly, the core network will also have the same problem when other types of secondary carriers under the NSA structure are added, making the user experience better. difference.

Summary of the invention

The embodiments of the present application provide a data processing method and related equipment, which are used to increase the network throughput rate of a base station after handover between stations and improve user experience.

The first aspect of the embodiments of the present application provides a data processing method, which is applied to a process in which a target base station and a source base station undergo an inter-site handover, and the target base station adds a secondary base station to a terminal that accesses the target base station to achieve dual connectivity. In the method, when the target base station determines that the core network element has completed the bearer change of the inter-site handover, that is, the target base station determines that the core network element has completed the user plane bearer change of the terminal between the source base station and the core network element to the terminal at the target When the user plane between the base station and the core network element is carried, the target base station obtains a first message, wherein the first message carries the identifier of the secondary base station, and the first message is used to indicate that the terminal that establishes access to the target base station is The user plane bearer between the secondary base station and the core network element; after that, the target base station sends the first message to the core network element, that is, when the target base station determines that the core network element has completed the bearer change for the inter-site handover, Only then will the first message be sent to the core network element, so that the core network then establishes the user plane bearer between the secondary base station and the core network element for the terminal accessing the target base station according to the first message, thereby avoiding the core network element. The network cannot process the bearer change between the target base station and the secondary base station at the same time in the process of handling the bearer change of the handover between the stations. The target base station fails to add the secondary base station as the secondary carrier. The processing mechanism of aligning the target base station and the core network element , To avoid the scenario where the auxiliary carrier addition process fails during the handover between stations, increase the success rate of the auxiliary carrier addition, and reduce the time delay of handover data disconnection, thereby increasing the network throughput rate in the dual-connection scenario and improving the user experience.

In a possible implementation manner of the first aspect of the embodiments of the present application, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. Among them, the process may be that the target base station learns from the core network element. Receive first confirmation information, where the first confirmation information is used to instruct the core network element to complete the bearer change of the inter-site handover. Further, after sending the first confirmation information, the target base station may send capability information to the core network element, the capability information is used to indicate the capability of the target base station to support dual connectivity, and the capability information is used to request the first confirmation information ; Therefore, after the core network element determines that the target base station has dual connectivity capabilities, when the core network element completes the bearer change of the inter-site handover, the core network element sends the first confirmation message to the target base station, so that the target The base station determines that the core network element has completed the bearer change of the inter-site handover, and the first confirmation information is used to indicate that the core network element has completed the bearer change of the inter-site handover.

In this embodiment, the target base station and the core network handshake after the inter-site handover is realized through the capability information to align the user plane bearer change status of both parties, that is, a process for the target base station to determine that the core network element completes the bearer change of the inter-site handover is provided The specific implementation method improves the feasibility of the solution.

In a possible implementation of the first aspect of the embodiments of the present application, the capability information may specifically be carried in the information exchanged between the target base station and the core network element, and may be specifically implemented through a second message, where the target base station sends The core network element sends a second message. The second message includes capability information. The second message is used to indicate that the control plane bearer of the terminal between the source base station and the core network element has been changed to that the terminal is between the target base station and the core network element. Between the control surface bearing.

In this embodiment, in order to prevent the core network from caching the reserved time for the capability information, the capability information may be carried in the second message sent by the target base station to the core network, thereby providing the target base station with the capability to send to the core network element. A specific realization of information improves the feasibility of the solution.

In a possible implementation manner of the first aspect of the embodiments of the present application, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. Among them, the process may be when the target base station receives from the source base station. After the termination identifier, the target base station determines that the core network element completes the bearer change of the inter-site handover.

In this embodiment, when the core network element determines that the bearer change of the inter-site handover has been completed, it will send an end marker for identifying the process to the source base station. Thereafter, when the target base station receives the source base station's After the termination identifier, the target base station can thereby determine that the core network element has completed the bearer change of the inter-site handover.

In a possible implementation manner of the first aspect of the embodiments of the present application, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. Among them, the process may be when the target base station transfers to the core network network. When the element sends the second message, the target base station starts the first timer, and the second message is used to indicate that the control plane bearer of the terminal between the source base station and the core network element has been changed to that the terminal is between the target base station and the core network element Therefore, when the first timer expires, the target base station determines that the core network element completes the bearer change of the inter-site handover.

In this embodiment, when the target base station sends the second message, the first timer is used to delay sending the first message, avoiding the processing time of the user plane bearer change corresponding to the handover between processing stations within the core network, that is, the target base station is provided A specific implementation method is determined for the core network element to complete the bearer change process of the inter-site handover, which improves the feasibility of the solution.

In a possible implementation of the first aspect of the embodiments of the present application, in order to further improve the network access success rate, the target base station may start the second timer after the target base station sends the first message to the core network element; The second timer expires. If the target base station does not receive the second confirmation message sent by the core network element, the target base station re-sends the first message to the core network element, and the second confirmation information is used to indicate that the core network element has completed The establishment of the user plane bearer between the secondary base station and the core network element of the terminal.

In this embodiment, after the target base station sends the first message to the core network element, the second timer can be used to verify whether the core network element has completed the process of changing the bearer corresponding to the first message. If it is not completed, it will be resent. The first message enables the core network element to perform a corresponding bearer change according to the re-sent first message, thereby improving the success rate of network access.

The second aspect of the embodiments of the present application provides a data processing method, which is applied to the core network element when processing the bearer change between the target base station and the source base station, adding a secondary base station for the terminal accessing the target base station to achieve dual During the connection process, in this method, when the core network element completes the bearer change of the inter-site handover, the core network element sends the first confirmation message to the target base station, where the bearer change of the inter-site handover indicates that the terminal is at the source The user plane bearer between the base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element, and the first confirmation information is used to indicate that the core network element has completed the bearer change for the inter-site handover; Thereafter, the core network element receives the first message sent by the target base station, the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the user plane bearer of the terminal between the secondary base station and the core network element; the core network network The element then establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, thereby avoiding the core network’s inability to process the terminal’s user plane bearer between the target base station and the secondary base station at the same time during the bearer change process of the handover between stations. The process of adding a secondary base station as a secondary carrier to the target base station fails due to the change of the load between the target base stations. By aligning the processing mechanism of the target base station and the core network element, the scenario where the secondary carrier adding process fails during the handover between stations is avoided, and the secondary carrier is added successfully. Rate, reduce the time delay of switching data out of the channel, thereby increasing the network throughput rate in the dual-connection scenario, and improving the user experience.

In a possible implementation of the second aspect of the embodiments of the present application, before the core network element sends the first confirmation information to the target base station, the first confirmation information may be sent in response to the capability information from the target base station, Among them, the core network element receives the capability information sent by the target base station, and the capability information is used to indicate the capability of the target base station to support dual connectivity; when the core network element determines the capability of the target base station to support dual connectivity according to the capability information, the target is determined The base station may have a requirement for dual connectivity, and then the core network element triggers the execution of sending the first confirmation message to the target base station.

In a possible implementation of the second aspect of the embodiments of the present application, the process by which the core network element receives the capability information sent by the target base station may be carried in the information exchanged between the target base station and the core network element, and specifically may pass through the second The core network element receives a second message sent by the target base station, the second message includes capability information, and the second message is used to indicate that the terminal's control plane bearer between the source base station and the core network element has been changed to The terminal is carried on the control plane between the target base station and the core network element.

In this embodiment, in order to prevent the core network from caching the reserved time of the capability information, the capability information may be directly carried in the second message sent by the target base station to the core network, thereby providing the target base station to send to the core network element A specific realization method of capability information improves the feasibility of the solution.

The third aspect of the embodiments of the present application provides a data processing method, which is applied to the core network element to process the bearer change of the target base station and the source base station when switching between the target base station and the source base station. During the connection process, in this method, the core network element receives the first message sent by the target base station, where the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal between the secondary base station and the core network element. After that, when the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, and the station The bearer change of the inter-handover indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element, that is, only when the core network element determines When the bearer change of the handover between stations is completed, the core network element then establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, thereby avoiding the bearer change process of the core network handover between processing stations The inability to process the terminal's bearer change between the target base station and the secondary base station at the same time causes the target base station to fail in the process of adding the secondary base station as the secondary carrier, which increases the network throughput rate in the dual-connection scenario and improves the user experience.

In a possible implementation of the second aspect of the embodiments of the present application, after the core network element receives the first message sent by the target base station, the method may specifically include: if the core network element determines that the inter-station handover is not completed When the bearer of the core network element changes, the core network element caches the first message.

In this embodiment, when the core network element determines that the bearer change of the inter-site handover has not been completed, the first message is cached, and compared with the direct discarding of the first message in the prior art, the first message is cached, thereby Later, when the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, so as to prevent the target base station from adding the secondary base station as a secondary base station. The carrier process failed.

A third aspect of the embodiments of the present application provides a target base station, and the target base station has the function of implementing the foregoing first aspect or any one of the possible implementation methods of the first aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions, for example: an acquiring unit, a sending unit, a determining unit, and a starting unit.

The fourth aspect of the embodiments of the present application provides a core network network element, and the core network network element has the function of realizing the foregoing second aspect or any one of the possible implementation manners of the second aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions, such as a receiving unit, a sending unit, and a establishing unit.

The fifth aspect of the embodiments of the present application provides a core network network element, and the core network network element has the function of realizing the foregoing second aspect or any one of the possible implementation manners of the second aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions, such as a receiving unit, a establishing unit, and a buffering unit.

A sixth aspect of the embodiments of the present application provides a communication device, including a processor coupled with a memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions in the memory, so that The method described in the foregoing first aspect or any one of the possible implementation manners of the first aspect is executed.

A seventh aspect of the embodiments of the present application provides a communication device, including a processor coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction in the memory, so that The foregoing second aspect or any one possible implementation manner of the second aspect, or the method described in the foregoing third aspect or any one possible implementation manner of the third aspect is executed.

The eighth aspect of the embodiments of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes any of the above-mentioned first aspect or first aspect. One possible way to achieve the method described.

A ninth aspect of the embodiments of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes any one of the above-mentioned second aspect or the second aspect. The method described in one possible implementation manner, or the processor executes the method described in the foregoing third aspect or any one of the possible implementation manners of the third aspect.

The tenth aspect of the embodiments of the present application provides a computer program product (or computer program) storing one or more computers. When the computer program product is executed by the processor, the processor executes the first aspect or the first aspect. Any one of the possible implementation methods.

The eleventh aspect of the embodiments of the present application provides a computer program product storing one or more computers. When the computer program product is executed by the processor, the processor executes the above-mentioned second aspect or any possible implementation of the second aspect Or, the processor executes the foregoing third aspect or any one of the possible implementation methods of the third aspect.

A twelfth aspect of the embodiments of the present application provides a chip system, which includes a processor, configured to support a target base station to implement the aforementioned first aspect or any one of the possible implementations of the first aspect. In a possible design, the chip system may also include a memory, and the memory is used to store the necessary program instructions and data of the target base station. The chip system can be composed of chips, or include chips and other discrete devices.

The thirteenth aspect of the embodiments of the present application provides a chip system that includes a processor for supporting core network elements to implement the functions involved in the second aspect or any one of the possible implementation manners of the second aspect. , Or, used to support the core network element to implement the functions involved in the third aspect or any one of the possible implementation manners of the third aspect. In a possible design, the chip system may also include a memory, and the memory is used to store the necessary program instructions and data of the core network element. The chip system can be composed of chips, or include chips and other discrete devices.

The fourteenth aspect of the embodiments of the present application provides a communication system. The communication system architecture includes the target base station in any of the foregoing embodiments and the foregoing core network network element in any of the implementations.

Among them, the third, sixth, eighth, tenth, twelfth, and fourteenth aspects or the technical effects brought by any one of the possible implementations can be found in the first aspect or the different possible implementations of the first aspect. The technical effect brought by it will not be repeated here.

Among them, the fourth, fifth, seventh, ninth, eleventh, thirteenth, and fourteenth aspects or the technical effects brought by any one of the possible implementation methods can be seen in the second aspect or the second aspect. The technical effects brought about by the possible implementation manners, or refer to the third aspect or the technical effects brought about by different possible implementation manners of the third aspect, which are not repeated here.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

In this embodiment, when the target base station determines that the core network element completes the bearer change of the inter-site handover, the target base station obtains the first message, where the bearer change of the inter-site handover includes that the terminal is between the source base station and the core network element The user plane bearer of the terminal is changed to the user plane bearer of the terminal between the target base station and the core network element. The first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal between the secondary base station and the secondary base station. User plane bearer between the core network elements; after that, the target base station sends a first message to the core network element. Therefore, when the target base station determines that the core network element has completed the bearer change of the inter-site handover, it sends the first message to the core network element, so that the core network then establishes the connection between the terminal and the secondary base station according to the first message. The user plane bearer between the core network elements, that is, once the target base station and the core network element complete the bearer change, the process of adding the secondary base station is initiated through the first message to avoid the inconsistent understanding between the target base station and the core network and the addition of the secondary base station. If the station fails, by aligning the processing mechanism of the target base station and the core network element to avoid the failure of the auxiliary carrier addition process during the handover between stations, increase the success rate of the auxiliary carrier addition, reduce the handover data gap delay, and increase the target base station’s presence The network throughput rate after handover improves user experience.

Description of the drawings

FIG. 1 is a schematic diagram of the implementation of a communication system in an embodiment of this application;

Figure 2a is a schematic diagram of a dual-connection network implementation in the EN-DC scenario;

Figure 2b is another schematic diagram of dual-connection network implementation in the EN-DC scenario;

Figure 3 is a schematic diagram of the implementation of handover between stations in the EN-DC scenario;

FIG. 4 is a schematic diagram of a data processing method in an embodiment of the application;

FIG. 5 is another schematic diagram of a data processing method in an embodiment of the application;

FIG. 6 is a schematic diagram of a target base station in an embodiment of the application;

FIG. 7 is a schematic diagram of a core network network element in an embodiment of this application;

FIG. 8 is another schematic diagram of a core network network element in an embodiment of this application;

FIG. 9 is another schematic diagram of a target base station in an embodiment of this application;

Fig. 10 is another schematic diagram of a core network element in an embodiment of this application.

Detailed ways

The embodiments of the present application provide a data processing method and related equipment, which are used to increase the network throughput rate after handover between stations and improve user experience.

The technical solutions in this application will be described below in conjunction with the drawings in this application.

The technical solutions of the embodiments of the present application can be applied to the communication system as shown in FIG. 1. The communication system includes a core network element 101, an access network device 111, and an access network device 112. The core network element 101 may be connected to the access network device 111 and the access network device 112. The terminal 121 can communicate with the access network device 111. It should be noted that the core network network elements, base stations, and terminals included in the communication system as shown in FIG. 1 are only an example, and the interface connection relationship between the base stations is also only an example. In the embodiment, the type and number of network elements included in the communication system, and the connection relationship between the network elements are not limited thereto.

The communication system may be a communication system that supports fourth-generation (4G) access technology, such as long-term evolution (LTE) access technology; or, the communication system may also support fifth-generation (fifth generation) access technology. generation, 5G) access technology communication system, such as new radio (NR) access technology; or, the communication system can also be a communication system that supports third generation (3G) access technology, such as ( universal mobile telecommunications system, UMTS) access technology; or the communication system can also be a second generation (2G) access technology communication system, such as global system for mobile communications (GSM) access Technology; or, the communication system may also be a communication system that supports multiple wireless technologies, such as a communication system that supports LTE technology and NR technology. In addition, the communication system can also be applied to future-oriented communication technologies.

The access network device 111 and the access network device 112 in FIG. 1 may be devices used on the access network side to support terminal access to the communication system, for example, may be a base transceiver station in a 2G access technology communication system. Transceiver station, BTS) and base station controller (BSC), node B (node B) and radio network controller (RNC) in 3G access technology communication system, 4G access technology communication system The evolved base station (evolved nodeB, eNB) in the 5G access technology communication system, the next generation nodeB (gNB), the transmission reception point (TRP), the relay node (relay node), Access point (access point, AP) and so on.

The core network element 101 in FIG. 1 can control one or more access network devices, or perform unified management of resources in the system, or can configure resources for the terminal. For example, the core network element may be a serving general packet radio service (GPRS) support node (serving GPRS support node, SGSN) or a gateway GPRS support node (gateway GPRS support node, in the 3G access technology communication system, GGSN), the mobile management entity (MME) or serving gateway (SGW) in the 4G access technology communication system, the access and mobility management function (Access and Mobility) in the 5G access technology communication system Management Function (AMF) network element or User Plane Function (UPF) network element, etc.

The terminal 121 in FIG. 1 may be a device that provides voice or data connectivity to users. For example, it may also be called user equipment (UE), mobile station (mobile station), subscriber unit (subscriber unit), and station. (station), terminal equipment (terminal equipment, TE), etc. The terminal can be a cellular phone, a personal digital assistant (PDA), a wireless modem (modem), a handheld device, a laptop computer, a cordless phone, and a wireless Local loop (wireless local loop, WLL) station, tablet computer (pad), etc. With the development of wireless communication technology, devices that can access the communication system, communicate with the network side of the communication system, or communicate with other objects through the communication system can all be the terminals in the embodiments of the present application, for example, intelligent transportation Terminals and cars in smart homes, household equipment in smart homes, power meter reading equipment in smart grids, voltage monitoring equipment, environmental monitoring equipment, video monitoring equipment in smart security networks, cash registers, etc. In the embodiment of the present application, the terminal may communicate with an access network device, for example, the access network device 111 or the access network device 112. Communication between multiple terminals is also possible. The terminal can be statically fixed or mobile.

In the communication system corresponding to Figure 1, it can be applied to the NSA architecture. Taking EN-DC as an example, the core network is an evolved packet core network based on the 4G network, and the anchor eNB is used as the primary base station, that is, the primary carrier for the terminal to access the core network. , GNB is used as a secondary carrier for the terminal to access the core network. As for when to add a gNB as a secondary carrier, the eNB can judge according to its own algorithm and send a request to the core network to add a secondary carrier, and then the core network executes the terminal to add gNB according to the request. As the bearer change process of the secondary carrier, the specific process of the primary base station eNB adding the secondary base station gNB as the secondary carrier can be referred to Figure 2a, where the interaction subject of the data transmission process involved in Figure 2a includes: user equipment (UE, user equipment) , Primary base station (Master eNB), secondary base station (Secondary GNB), core network elements include: serving gateway (SGW, serving gateway), mobility management node function entity (MME, mobility management entity function), the process specifically includes:

Step 201: The primary base station sends a secondary base station addition request (SgNB addition request) to the secondary base station;

Step 202: When the secondary base station confirms that it supports the request, the secondary base station returns a secondary base station addition confirmation (SgNB addition request acknowledge) to the primary base station;

Step 203: The main base station sends a radio resource control protocol connection re-establishment message (Radio resource control reconfigutation) to the UE;

Step 204: The UE returns a radio resource control protocol connection reestablishment confirmation (Radio resource control reconfigutation complete) to the primary base station;

Step 205: The primary base station sends a secondary base station reconfiguration confirmation (SgNB reconfiguration complete) to the secondary base station;

Step 206: The secondary base station initiates a random access procedure establishment procedure (ramdom access procedure) to the UE;

Step 207: The primary base station sends a status transfer message (SgNB status transfer) to the secondary base station;

Step 208: The primary base station, the secondary base station, and the SGW negotiate to process data forwarding (data forwarding);

Step 209: The primary base station sends an evolved radio access bearer modification indication (E-rab modification indication) to the secondary base station;

Step 210: Handle bearer modication between the SGW and the MME;

Step 211: The SGW sends a data packet carrying an end marker (end marker packer) to the main base station;

Step 212: The MME sends an evolved radio access bearer modification confirmation indication (E-rab modification confirmation) to the master base station.

Among them, the process from step 209 to step 212 is called the path update process, that is, the data transmission path to the UE is realized through the data exchange core network, and the UE can subsequently perform data transmission through the updated data transmission path, that is, the primary base station is used as Primary carrier, add secondary base station as secondary carrier for carrier aggregation data transmission.

After completing the secondary carrier addition process shown in Figure 2a, the network data transmission architecture can be seen in Figure 2b, where the eNB and gNB have an UP connection with the serving gateway (SGW, serving gateway) in the EPC through the S1-U interface, and Only the eNB and the mobility management node function entity (MME, mobility management entity function) in the EPC have a control plane CP connection, and the eNB can transmit CP data with the gNB through the X2-C interface.

Before the establishment of the network architecture corresponding to Figure 2b, if a terminal accessing the eNB triggers inter-station handover due to changes in signal quality, wireless transmission traffic load adjustment, activation operation and maintenance, equipment failure lights, etc., the primary carrier will occur The transfer of the terminal is the process of transferring the terminal from the evolved base station (SeNB, source eNB) of the source 4G network to the evolved base station (TeNB, target eNB) of the target 4G network. The terminal completes the handover between the SeNB and the TeNB. At this time, The core network element needs to process the bearer change process for the terminal to access the core network, so that the terminal changes from the original connection to the core network through the source base station to the connection from the target base station to the core network, specifically based on the S1 interface For the implementation of inter-eNB handover, please refer to the steps in Fig. 3. Among them, the interaction subjects of the transmission process involved in Fig. 3 include: UE, source eNB, target eNB, and core network elements include source MME, target MME, source SGW, and target SGW. , Public data network gateway (PGW, public data network gateway), home subscriber server (HSS, home subscriber server), this process specifically includes:

Data transmission status: downlink user plane data, the specific downlink path of user plane data is PGW, SGW, SeNB, UE.

Step 1: The source eNB decides to perform S1-based handover (Decision to trigger a relocation via S1), that is, the source eNB decides to perform S1-based handover. The reason for S1 handover may be that there is no X2 connection between the source eNB and the target eNB, or The source eNB makes judgments based on other conditions.

Step 2: The source eNB sends a handover request (Handover required) message to the source MME;

Step 3: The source MME selects a suitable target MME, and sends a forward relocation request message to the target MME through the S10 interface;

Step 4: The target MME selects the corresponding target SGW;

Step 4a: The target SGW returns a create session response (create session response) message to the source MME.

Step 5: The target MME sends a handover request (Handover request) message to the target eNB;

Step 5a: After receiving the above message, the target eNB will establish the UE context, and the target eNB will also send back a handover request acknowledgement message to the target MME;

Step 6: The target MME sends a Create indirect data forwarding tunnel request message to the target SGW;

Step 6a: The target SGW replies to create an indirect data forwarding channel response (Create indirect data forwarding tunnel response) message;

Step 7: The target MME sends a forward relocation response (Forward relocation response) message to the source MME;

Step 8: The source MME sends a Create indirect data forwarding tunnel request message to the source SGW;

Step 8a: The source SGW replies to create an indirect data forwarding response (Create indirect data forwarding response);

Step 9: The source MME sends a handover confirmation (Handover command) message to the source eNB;

Step 9a: The source eNB will send a handover confirmation (Handover command) to the UE;

Step 9b: The source eNB will send the access network usage data report (RAN Usage data report) to the source MME;

Step 10: The source eNB sends an eNB status transfer (eNB status transfer) message;

Step 10a: The source MME sends a forward access context notification (Forward access context notification) to the target MME;

Step 10b: The source MME sends a forward access context acknowledgement (Forward access context acknowledge) to the target MM;

Step 10c: The target MME sends an eNB status transfer (eNB status transfer) to the target eNB;

Step 11a: The source eNB forwards the data to the target eNB through only for direct forwarding of data;

Step 11b: The source eNB sends data to the target eNB by only for indirect forwarding of data, where the source eNB finds that the data needs to be forwarded to the target eNB, and the source eNB first sends the data to the source SGW. The source SGW forwards the data to the target SGW, and the target SGW finally forwards the data to the target eNB;

Step 12: After the UE establishes uplink and downlink synchronization with the target eNB, it sends a Handover Confirm message to the target eNB;

Data transmission status: Uplink user plane data. At this time, the target eNB can send the downlink data forwarded from the source eNB to the UE, and the UE also starts to send the uplink data, which passes through the target eNB to the target SGW and finally to the PGW;

Step 13: The target eNB sends a handover notification (Handover Notify) message to the target MME.

Step 14: The target MME sends a forward relocation complete notification (Forward relocation complete notification) message to the source MME;

Step 14b: The source MME responds with a Forward relocation complete acknowledgement (Forward relocation complete acknowledgement) message. At this time, the source MME and the target MME start corresponding timers to delete the corresponding resources after the handover is completed;

Step 15: The target MME sends a Modify bearer request message to the target SGW. After that, the downlink data channel after the handover is partially established between the target SGW and the target eNB;

Step 16: The target SGW sends a Modify bearer request message to the PGW, so that the handover of the downlink data channel between the PGW and the target SGW is completed, and the entire downlink channel between the PGW and the target eNB is established When finished, the downlink data can reach the UE from the PGW, via the target SGW and the target eNB;

Step 16a: The PGW updates the corresponding context and returns a Modify bearer response message to the target SGW;

Step 17: After the target SGW receives the response from the PGW, the uplink channel can be established from the SGW to the PGW, and the target SGW returns a Modify bearer response message to the target MME. If the SGW does not change, the SGW should be in Send one or more "end marker" data packets on the old path immediately after the path is switched to assist the reordering function in the target eNB; if data forwarding (direct or indirect) occurs, the source eNB must forward it The tunnel forwards the "end mark" packet to the target eNodeB.

Data transmission status: After step 17, the core network side has determined to complete the bearer change corresponding to the inter-site handover between the source eNB and the target eNB;

Step 18: The UE can trigger the corresponding TAU process. After that, the source MME and the target MME will trigger the corresponding resource release process, that is, the handover between eNB stations based on the S1 interface is completed.

Wherein, after the core network receives the handover completion notification sent by the target eNB in step 13, it processes the bearer change of the handover process between stations in step 14 to step 17.

However, the process of triggering the addition of gNB as a secondary carrier by the target base station in the handover process in Figure 3 or after the handover is random. If the core network is in the process of handling the bearer change of the target base station and the source base station handover (corresponding to the step in Figure 3) 14 to step 17), when the target base station sends a request to the core network to add gNB as a secondary carrier (corresponding to step 109 in Figure 1), a conflict will occur, because the core network is performing the bearer change for inter-site handover (corresponding to step 14 to step 14 in Figure 3). Step 17) The bearer change that adds gNB as a secondary carrier cannot be processed at the same time (corresponding to step 110 to step 112 in Figure 1), resulting in the failure of the target base station's current secondary carrier addition, that is, the eNB and the core network may have inconsistent understanding of the process conflict scenario , Which ultimately leads to the failure of gNB addition, which affects the success rate of 5G access in the EN-DC scenario.

Similarly, the core network under the NSA structure or other types of dual connection modes under the SA structure will also have the same problem, such as E-UTRA and NR dual connection, NR and E-UTRA dual connection, or NR- NR dual connectivity, etc., take NR-NR dual connectivity as an example. When the base station accessed by the UE is a gNB, during the inter-site handover process of the base station, that is, the process of switching from the source gNB to the target gNB, the target gNB is used to add auxiliary When the base station gNB is used as a secondary carrier, the target gNB and the core network may have inconsistent understanding of the process conflict scenario, which eventually causes the secondary base station to fail to add, which affects the success rate of network access and makes the user experience poor. To this end, the embodiments of the present application provide a data processing method and related equipment, which are used to increase the network throughput rate after handover between stations and improve user experience.

The following will describe a data processing method in the embodiments of the present application through specific embodiments. Specifically, the method is applied to the target base station and the source base station when an inter-site handover occurs, and the target base station is a terminal that accesses the target base station. For the process of adding a secondary base station to achieve dual connectivity, please refer to FIG. 4. An embodiment of a data processing method in an embodiment of the present application includes:

401. When it is determined that the core network element has completed the bearer change of the inter-station handover, the target base station obtains the first message.

In this embodiment, when the target base station determines that the core network element has completed the bearer change of the inter-site handover, the target base station obtains the first message, where the bearer change of the inter-site handover indicates that the terminal is between the source base station and the core network element. The user plane bearer is changed to the user plane bearer of the terminal between the target base station and the core network element. The first message includes the identifier of the secondary base station, and the first message indicates the establishment of a user plane connection between the secondary base station and the terminal.

Among them, the core network network element may include related network elements in the EPC in the LTE network, such as MME, SGW, PGW and other network elements, or may include the authentication management function entity (AMF, authentication management function) and user in the NR network. A port function entity (UPF, user port function), or a core network element in a higher-level network, etc., the target base station, secondary base station, and source base station may be an eNB, a gNB, or base station equipment in a higher-level network.

Specifically, when the target base station determines that the core network element has completed the bearer change of the inter-site handover, that is, the target base station determines that the core network element has completed the user plane bearer change of the terminal between the source base station and the core network element to the terminal at the target When the user plane between the base station and the core network element is carried, the target base station obtains the first message, where the first message includes the identifier of the secondary base station, and is used to indicate that the terminal connected to the target base station establishes a connection with the secondary base station. In addition, the first message can be triggered when the target base station determines that the target base station and the terminal accessing the target base station have dual connectivity capabilities, or it can be generated based on the request of the terminal accessing the target base station It can also be obtained in other ways, which is not limited here.

In this embodiment, the determination process for the target base station to determine whether the core network element has completed the bearer change of the inter-site handover can be implemented in multiple ways, which will be described in detail below:

1. Realized by sending capability information to the core network element;

In this embodiment, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. Among them, the process may be that the target base station sends capability information to the core network element, and the capability information is used to indicate the target. The capability of the base station to support dual connectivity can be used to request the first confirmation information through the capability information. After this, the core network element determines that the target base station has dual connectivity capabilities, and completes the bearer handover between the core network elements. During the change, the core network element sends the first confirmation message to the target base station, so that the target base station determines that the core network element has completed the bearer change of the inter-site handover, where the first confirmation information is used to indicate that the core network element has completed Bearer changes for handover between stations. That is to say, the target base station and the core network handshake after the inter-site handover is realized through the capability information to align the user plane bearer change status of both parties, which provides a specific process for the target base station to determine the core network element to complete the bearer change of the inter-site handover. The method of implementation improves the feasibility of the solution.

In addition, the capability information can be specifically carried in the information that the target base station interacts with the core network element. For example, in the EN-DC scenario, it can be in each message sent by the target base station to the core network before step 13 corresponding to Figure 3. The capability information can be carried, or even a new signaling can be created specifically to carry the capability information. After that, the core network caches the capability information and then performs adaptive processing based on the capability information when needed later. Specifically, in this embodiment, in order to prevent the core network from caching the reserved time for the capability information, that is, to reduce the signaling consumption of the core network element, it can be specifically implemented through the second message, where the target base station sends the first message to the core network element. Two messages, the second message includes capability information, and the second message is used to indicate that the control plane bearer of the terminal between the source base station and the core network element has been changed to the control plane bearer of the terminal between the target base station and the core network element, For example, in the EN-DC scenario, the second message can be implemented in step 13 corresponding to Figure 3, so that the target base station can determine that the core network element has completed the bearer of the inter-site handover through the first confirmation information fed back by the core network element change.

2. Realized by sending the termination identifier to the source base station;

In this embodiment, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. Among them, the process may be that after the target base station receives the termination identifier sent by the source base station, the target base station determines the core network network. The element completes the bearer change of the inter-site handover. Specifically, take the implementation of the S1 interface-based eNB inter-site handover corresponding to Figure 3 as an example. The process of the source base station and the target base station for the inter-site handover is shown in step 17 in Figure 1. It is shown that if the SGW does not change, the SGW should send one or more "end marker" data packets on the old path immediately after the path is switched to assist the reordering function in the target eNB; if data forwarding occurs ( Directly or indirectly), the source eNB must forward the "termination identification" packet to the target eNB through the forwarding tunnel. Similarly, in the handover between gNB stations based on the S1 interface or other scenarios, the source base station will send the core network element The termination identifier of is forwarded to the target base station to indicate that the core network element has completed the bearer change of the inter-site handover.

In this embodiment, when the core network element determines that the bearer change of the inter-site handover has been completed, it will send an end marker for identifying the process to the source base station. Thereafter, when the target base station receives the source base station's After the termination identifier, the target base station can thereby determine that the core network element has completed the bearer change of the inter-site handover.

3. Realized by the first timer set by the source base station itself;

In this embodiment, there are multiple processes for the target base station to determine that the core network element completes the bearer change of the inter-site handover. The process may be that when the target base station sends a second message to the core network element, the target base station starts the first Timer, where the second message is used to indicate that the terminal's control plane bearer between the source base station and the core network element has been changed to the terminal's control plane bearer between the target base station and the core network element, so that when the first When the timer expires, the target base station determines that the core network element completes the bearer change of the inter-station handover.

Specifically, when the target base station sends the second message, the first timer is used to delay sending the first message, avoiding the processing time of the user plane bearer change corresponding to the handover between processing stations in the core network, for example, in the EN-DC scenario In this case, the second message can be implemented by corresponding step 13 in FIG. 3, so that the target base station can determine that the core network element has completed the bearer change of the inter-site handover when the first timer expires.

402. The target base station sends the first message to the core network element.

In this embodiment, the target base station sends a first message to the core network element, the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the user plane bearer of the terminal between the secondary base station and the core network element.

Specifically, the target base station sends the first message obtained in step 401 to the core network element, where the first message carries the identifier of the secondary base station in the first message, so that the core network element according to the The identification can determine the secondary base station.

403. The core network element establishes a user plane bearer of the terminal between the secondary base station and the core network element according to the first message.

In this embodiment, the core network element establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message obtained in step 402, that is, when the target base station determines that the core network element has completed Only after the bearer of the inter-site handover is changed, will the first message be sent to the core network element, so that the core network then establishes the terminal accessing the target base station according to the first message between the secondary base station and the core network element The user plane bearer avoids the failure of the target base station to add the secondary base station as the secondary carrier due to the failure of the target base station to add the secondary base station as the secondary carrier due to the failure of the target base station to add the secondary base station as the secondary carrier during the bearer change process of the handover between the core network. With the processing mechanism of the core network element, it avoids the scenario where the auxiliary carrier addition process fails during the handover between stations, increases the success rate of the auxiliary carrier addition, reduces the time delay of handover data dropping, thereby increasing the network throughput rate after the handover between stations and improving user experience.

In the embodiment of this application, based on the embodiment described in FIG. 4, as a preferred implementation manner, in step 402, after the target base station sends the first message to the core network element, in order to further improve the network access success rate, the target base station may After sending the first message to the core network element, the target base station starts the second timer; when the second timer expires, if the target base station does not receive the second confirmation message sent by the core network element, the target base station retransmits to the core network The network element sends the first message, and the second confirmation information is used to indicate that the core network element has completed the establishment of the user plane bearer of the terminal between the secondary base station and the core network element. In addition, after resending the first message, if the response from the core network is still not received, that is, if the first confirmation message sent by the core network element is still not received within the preset time period, repeat the above In the process, until the first confirmation message sent by the core network element is received, or the call ends, or for other reasons (such as deterioration of the signal quality of the secondary base station), it is no longer necessary to trigger the addition of the secondary base station.

Wherein, after the target base station sends the first message to the core network element, the second timer can be used to verify whether the core network element has completed the bearer change process corresponding to the first message, and if it is not completed, the first message is retransmitted. The message allows the core network element to perform the corresponding bearer change according to the re-sent first message, thereby further improving the network access success rate.

The embodiment corresponding to Fig. 4 is mainly aimed at the improvement and optimization of the target base station side, that is, when the target base station determines that the core network element completes the bearer change of the inter-site handover, the target base station obtains the first message and sends it to the target base station for Instructing the establishment of the first message to add the secondary base station as the secondary carrier, so that a consensus can be reached between the core network element and the target base station, and conflicts that may occur during the process of the core network element processing the bearer change are avoided. In addition, further improvement and optimization can be performed on the side of the core network element, which will be introduced through specific embodiments below.

Referring to FIG. 5, in an embodiment of the data processing method in the embodiment of the present application, when the core network element is used to process the bearer change of the target base station and the source base station handover, it is the target base station accessing the target base station. The process in which the terminal adds a secondary base station to realize dual connectivity includes:

501. A core network element receives a first message sent by a target base station;

In this embodiment, the core network element receives the first message sent by the target base station, where the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of a user terminal between the secondary base station and the core network element Surface bearing.

Wherein, similar to the embodiment shown in FIG. 4, the core network network element may include related network elements in the EPC in the LTE network, such as MME, SGW, PGW, and other network elements, or may include the authentication management function entity in the NR network (AMF, authentication management function), user port function entity (UPF, user port function), or core network elements in a higher-level network, etc. The target base station, secondary base station, and source base station can be eNB, gNB, or more. Base station equipment in advanced networks, etc. Specifically, the target base station may generate the first message according to the message that triggers the secondary base station, where the first message carries the identifier of the secondary base station, so that the core network element can determine the secondary base station based on the identifier.

502. When the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes a user plane bearer of the terminal between the secondary base station and the core network element according to the first message.

In this embodiment, when the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, and the bearer of the inter-site handover The change indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element. That is to say, only when the core network element determines to complete the bearer change of the inter-site handover, the core network element then establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, thereby avoiding The core network cannot process the bearer changes of the terminal between the target base station and the secondary base station at the same time during the process of handling the bearer change of the handover between the stations. The target base station fails to add the secondary base station as the secondary carrier, which increases the network throughput after the handover between the stations. Rate and improve user experience.

Based on the embodiment shown in FIG. 5, as a preferred implementation manner, after the core network element receives the first message sent by the target base station in step 501, the method may specifically include: if the core network element determines that the inter-station handover has not been completed When the bearer of the core network element changes, the core network element caches the first message. Wherein, when the core network element determines that the bearer change of the inter-station handover is not completed, the first message is cached, and compared with the direct discarding of the first message in the prior art, the first message is cached, so that in the subsequent processing When the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, avoiding the process of adding the secondary base station as the secondary carrier by the target base station failure.

The embodiments of the present application are described above from the perspective of methods, and the target base stations and core network elements in the embodiments of the present application are introduced below from the perspective of specific device implementation.

Referring to FIG. 6, an embodiment of a target base station 600 in the embodiment of the present application includes:

The acquiring unit 601 is configured to acquire a first message when the target base station determines that the core network element completes the bearer change of the inter-site handover, and the bearer change of the inter-site handover includes the user plane of the terminal between the source base station and the core network element The bearer is changed to the user plane bearer of the terminal between the target base station and the core network element, the first message carries the identifier of the secondary base station, and the first message is used to instruct to establish the terminal between the secondary base station and the core network element. User plane bearer between;

The sending unit 602 is configured to send a first message to the core network element.

In this embodiment, the acquiring unit 601 is configured to acquire the first message when the target base station determines that the core network element has completed the bearer change of the inter-site handover. The bearer change of the inter-site handover includes the terminal's change in the source base station and the core network element. The user plane bearer between the terminal is changed to the user plane bearer of the terminal between the target base station and the core network element. The first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal between the secondary base station and the secondary base station. The user plane bearer between the core network elements; the sending unit 602 is configured to send the first message to the core network element. Therefore, when the target base station determines that the core network element has completed the bearer change of the inter-site handover, the sending unit 602 sends the first message to the core network element, so that the core network then establishes the connection between the terminal and the secondary base station according to the first message. The user plane bearer between the core network elements, thereby avoiding the fact that the core network cannot handle the bearer change between the target base station and the secondary base station at the same time during the bearer change process of the handover between stations. The process of the secondary carrier fails. By aligning the processing mechanism of the target base station and the core network element, the scenario where the secondary carrier addition process fails during the inter-site handover is avoided, the success rate of the secondary carrier addition is increased, and the handover data dropping delay is reduced, thereby increasing the The network throughput rate after switching between stations improves the user experience.

In a possible implementation manner, the obtaining unit 601 is further configured to:

Receive first confirmation information from the core network element, where the first confirmation information is used to instruct the core network element to complete the bearer change of the inter-site handover.

In a possible implementation manner, the sending unit 602 is further configured to:

The capability information is sent to the core network element, the capability information indicates that the target base station supports dual connectivity, and the capability information is used to request the first confirmation information.

In a possible implementation manner, the target base station further includes:

The determining unit 603 is configured to, after the target base station receives a termination identifier from the source base station, determine that the core network element completes the bearer change of the inter-site handover, and the termination identifier indicates that the terminal is between the source base station and the core network element The data transmission carried by the user plane has ended.

In a possible implementation manner, the target base station further includes:

The starting unit 604 is configured to start a first timer when the target base station sends a second message to the core network element, and the second message is used to instruct the terminal to bear the control plane between the source base station and the core network element It has been changed to that the terminal is carried by the control plane between the target base station and the core network element;

The determining unit 603 is configured to determine that the core network element completes the bearer change of the inter-site handover when the first timer expires.

In a possible implementation manner, the target base station further includes:

The starting unit 604 is configured to start the second timer for the target base station;

The sending unit 602 is further configured to re-send the first message to the core network element when the second timer expires and the target base station does not receive the second confirmation information from the core network element. The second confirmation information is used to indicate that the core network element has completed the establishment of the user plane bearer of the terminal between the secondary base station and the core network element.

It should be noted that, for details such as the information execution process of the unit of the target base station 600, please refer to the description in the method embodiment shown in the foregoing application, which will not be repeated here.

Referring to FIG. 7, an embodiment of a core network element 700 in the embodiment of the present application includes:

The sending unit 701 is configured to send first confirmation information to the target base station, where the first confirmation information is used to indicate that the core network element has completed the bearer change of the inter-site handover, and the bearer change of the inter-site handover includes the terminal's connection between the source base station and the source base station. The user plane bearer between the core network elements is changed to the user plane bearer of the terminal between the target base station and the core network element;

The receiving unit 702 is configured to receive a first message from the target base station, where the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the user plane of the terminal between the secondary base station and the core network element Bearer

The establishing unit 703 is configured to establish a user plane bearer of the terminal between the secondary base station and the core network element according to the first message.

In this embodiment, the sending unit 701 is configured to send first confirmation information to the target base station, where the first confirmation information is used to indicate that the core network element has completed the bearer change of the inter-site handover, and the bearer change of the inter-site handover includes The user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element; the receiving unit 702 is configured to receive the first message from the target base station. The first message carries the identifier of the secondary base station, and the first message is used to instruct to establish the user plane bearer of the terminal between the secondary base station and the core network element; the establishment unit 703 is used to establish the terminal according to the first message The user plane bearer between the secondary base station and the core network element. Therefore, it is avoided that the core network element 700 cannot process the bearer change of the terminal between the target base station and the secondary base station at the same time during the bearer change process of the handover between the stations, and the process of adding the secondary base station as the secondary carrier by the target base station fails. The processing mechanism of the target base station and the core network element to avoid the failure of the auxiliary carrier addition process during the handover between stations, increase the success rate of the auxiliary carrier addition, and reduce the time delay of handover data dropping, thereby increasing the network throughput rate after the handover between stations , Improve user experience.

In a possible implementation manner, the receiving unit 702 is further configured to:

Receiving capability information from the target base station, where the capability information is used to indicate the capability of the target base station to support dual connectivity;

The core network element further includes a trigger unit 704, which is used to trigger when the core network element completes the bearer change of the inter-site handover after the core network element determines the capability of the target base station to support dual connectivity according to the capability information Send the first confirmation information to the target base station.

It should be noted that, for details such as the information execution process of the unit of the core network element 700, please refer to the description in the method embodiment shown in the foregoing application, which will not be repeated here.

Referring to FIG. 8, an embodiment of a core network element 800 in the embodiment of the present application includes:

The receiving unit 801 is configured to receive a first message from a target base station, where the first message carries an identifier of a secondary base station, and the first message is used to instruct the establishment of a user plane bearer of the terminal between the secondary base station and the core network element;

The establishing unit 802 is configured to, when the core network element determines to complete the bearer change of the inter-station handover, the core network element establishes the user plane of the terminal between the secondary base station and the core network element according to the first message Bearer, the change of the bearer of the handover between stations indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element.

In this embodiment, the receiving unit 801 is configured to receive a first message from the target base station. The first message carries the identifier of the secondary base station. The first message is used to instruct the establishment of a terminal between the secondary base station and the core network element. The establishment unit 802 is used for when the core network element determines to complete the bearer change of the inter-site handover, the core network element establishes the terminal between the secondary base station and the core network element according to the first message The user plane bearer of the inter-site handover indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element. That is, only when the core network element 800 determines that the bearer change for the inter-site handover is completed, the core network element then establishes the user plane bearer of the terminal between the secondary base station and the core network element according to the first message, thereby avoiding The core network cannot handle the bearer change between the target base station and the secondary base station at the same time in the process of handling the bearer change of the handover between the stations. The target base station fails to add the secondary base station as the secondary carrier, which increases the network after the handover between the stations. Throughput rate, improve user experience.

In a possible implementation manner, the core network element further includes:

The buffer unit 803 is configured to buffer the first message after the core network element receives the first message sent by the target base station and before the core network element determines to complete the bearer change of the inter-site handover.

It should be noted that, for details such as the information execution process of the unit of the core network element 800, please refer to the description in the method embodiment shown in the foregoing application, which will not be repeated here.

Please refer to FIG. 9, which is a schematic diagram of the structure of the target base station involved in the foregoing embodiment, that is, the access network device, which is provided in the embodiment of this application. For the structure of the access network device, refer to the structure shown in FIG. 9.

The access network device includes at least one processor 911, at least one memory 912, at least one transceiver 913, at least one network interface 914, and one or more antennas 915. The processor 911, the memory 912, the transceiver 913, and the network interface 914 are connected, for example, by a bus. In the embodiment of the present application, the connection may include various interfaces, transmission lines, or buses, etc., which is not limited in this embodiment. . The antenna 915 is connected to the transceiver 913. The network interface 914 is used to connect the access network device to other communication devices through a communication link. For example, the network interface 914 may include a network interface between the access network device and a core network element, such as an S1 interface, and the network interface may include A network interface between an access network device and other network devices (such as other access network devices or core network elements), such as an X2 or Xn interface.

The processor 911 is mainly used to process communication protocols and communication data, control the entire access network equipment, execute software programs, and process data of the software programs, for example, to support the access network equipment to execute the description in the embodiment action. The access network device may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. The data. The processor 911 in FIG. 9 can integrate the functions of a baseband processor and a central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

The memory is mainly used to store software programs and data. The memory 912 may exist independently and is connected to the processor 911. Optionally, the memory 912 may be integrated with the processor 911, for example, integrated in one chip. The memory 912 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 911 controls the execution. Various types of computer program codes that are executed can also be regarded as drivers of the processor 911.

Figure 9 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or storage device. The memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in the embodiment of the present application.

The transceiver 913 may be used to support the reception or transmission of radio frequency signals between the access network device and the terminal, and the transceiver 913 may be connected to the antenna 915. The transceiver 913 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 915 can receive radio frequency signals, and the receiver Rx of the transceiver 913 is used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital The baseband signal or digital intermediate frequency signal is provided to the processor 911, so that the processor 911 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 913 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 911, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through a Or multiple antennas 915 transmit the radio frequency signal. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of precedence is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal, the up-mixing processing and the digital-to-analog conversion processing The order of precedence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

The transceiver may also be referred to as a transceiver unit, transceiver, transceiver, and so on. Optionally, the device used to implement the receiving function in the transceiver unit can be regarded as the receiving unit, and the device used to implement the transmitting function in the transceiver unit can be regarded as the transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit, and the receiving unit is also It can be called a receiver, an input port, a receiving circuit, etc., and a sending unit can be called a transmitter, a transmitter, or a transmitting circuit, etc.

Please refer to FIG. 10, which is a schematic diagram of a possible logical structure of the core network element involved in the above-mentioned embodiment provided by the embodiments of this application. The core network element includes at least one memory 1012, at least one processor 1011, and At least one network interface 1013. The memory 1012, the processor 1011 and the network interface 1013 are connected.

The processor 1011 may be used to implement various functions for the core network elements, such as controlling one or more access network devices, or uniformly managing resources in the system, or configuring resources for the terminal.

The memory 1012 may be used to store program codes for executing the technical solutions of the embodiments of the present application, and be executed by the processor 1011 to implement the functions of the core network network elements in the embodiments of the present application.

The core network element may communicate with the access network device or terminal through the network interface 1013, for example, send data to the access network device or terminal, or receive data from the access network device or terminal, and so on.

The embodiments of the present application also provide a computer-readable storage medium storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in the possible implementation of the target base station.

The embodiment of the present application also provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the above-mentioned possible implementation of the core network element method.

The embodiment of the present application also provides a computer program product (or called a computer program) storing one or more computers. When the computer program product is executed by the processor, the processor executes the method of the aforementioned possible implementation of the target base station.

The embodiment of the present application also provides a computer program product storing one or more computers. When the computer program product is executed by the processor, the processor executes the method of the foregoing possible implementation of the core network element.

An embodiment of the present application also provides a chip system, which includes a processor, configured to support the target base station to implement the functions involved in the foregoing possible implementation manners of the target base station. In a possible design, the chip system may also include a memory, and the memory is used to store the necessary program instructions and data of the target base station. The chip system can be composed of chips, or include chips and other discrete devices.

The embodiment of the present application also provides a chip system, the chip system includes a processor, which is used to support the core network element to realize the functions involved in the possible implementation of the core network element, or to support the core network element. Meta implements the functions involved in the third aspect or any one of the possible implementation manners of the third aspect. In a possible design, the chip system may also include a memory, and the memory is used to store the necessary program instructions and data of the core network element. The chip system can be composed of chips, or include chips and other discrete devices.

The embodiment of the present application also provides a communication system, which includes the above-mentioned target base station and the above-mentioned core network element.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes. .

Claims (29)

A data processing method, characterized in that it comprises: When the target base station determines that the core network element has completed the bearer change of the inter-site handover, the target base station obtains the first message, and the bearer change of the inter-site handover includes the user of the terminal between the source base station and the core network element The plane bearer is changed to the user plane bearer of the terminal between the target base station and the core network element, the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal on the The user plane bearer between the secondary base station and the core network element; The target base station sends a first message to the core network element. The method according to claim 1, wherein the method further comprises: The target base station receives first confirmation information from the core network element, where the first confirmation information is used to instruct the core network element to complete the bearer change of the inter-site handover. The method according to claim 2, wherein before the target base station receives the first confirmation information from the core network element, the method further comprises: The target base station sends capability information to the core network element, the capability information indicates that the target base station supports dual connectivity, and the capability information is used to request the first confirmation information. The method according to claim 1, wherein the method further comprises: After the target base station receives the termination identifier from the source base station, the target base station determines that the core network element has completed the bearer change of the inter-site handover, and the termination identifier indicates that the terminal is in the source base station and The data transmission carried by the user plane between the core network elements has ended. The method according to claim 1, wherein the method further comprises: When the target base station sends a second message to the core network element, the target base station starts a first timer, and the second message is used to indicate that the terminal is in the control plane between the source base station and the core network element The bearer has been changed to the control plane bearer of the terminal between the target base station and the core network element; When the first timer expires, the target base station determines that the core network element completes the bearer change of the inter-station handover. The method according to any one of claims 1 to 5, wherein when the target base station sends a first message to the core network element, the method further comprises: The target base station starts a second timer; When the second timer expires and the target base station does not receive the second confirmation information from the core network element, the target base station resends the first message to the core network element, so The second confirmation information is used to indicate that the core network element has completed the establishment of the user plane bearer of the terminal between the secondary base station and the core network element. A data processing method, characterized in that it comprises: The core network element sends first confirmation information to the target base station, where the first confirmation information is used to indicate that the core network element has completed the bearer change of the inter-site handover, and the bearer change of the inter-site handover includes that the terminal is in the source base station. The user plane bearer with the core network element is changed to the user plane bearer between the target base station and the core network element of the terminal; The core network element receives a first message from the target base station, the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal between the secondary base station and the core network. User plane bearer between yuan; The core network element establishes a user plane bearer of the terminal between the secondary base station and the core network element according to the first message. The method according to claim 7, wherein the method further comprises: The core network element receives capability information from the target base station, where the capability information is used to indicate the capability of the target base station to support dual connectivity; After the core network element determines the capability of the target base station to support dual connectivity according to the capability information, when the core network element completes the bearer change of the inter-site handover, the core network element triggers the execution The target base station sends the first confirmation information. A data processing method, characterized in that it comprises: The core network element receives a first message from the target base station, the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the user plane of the terminal between the secondary base station and the core network element Bearer When the core network element determines that the bearer change of the inter-site handover is completed, the core network element establishes the user plane of the terminal between the secondary base station and the core network element according to the first message Bearer, the change of the bearer of the inter-station handover indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element. The method according to claim 9, wherein after the core network element receives the first message sent by the target base station, before the core network element determines to complete the bearer change of the inter-site handover, the Methods also include: The core network element caches the first message. A target base station, characterized in that it comprises: The acquiring unit is configured to acquire a first message when the target base station determines that the core network element has completed the bearer change of the inter-site handover, where the bearer change of the inter-site handover includes the user plane of the terminal between the source base station and the core network element The bearer change is the user plane bearer of the terminal between the target base station and the core network element, the first message carries the identifier of the secondary base station, and the first message is used to indicate the establishment of the terminal between the secondary base station and the secondary base station. The user plane bearer between the network elements of the core network; The sending unit is configured to send the first message to the core network element. The target base station according to claim 11, wherein the acquiring unit is further configured to: Receiving first confirmation information from the core network element, where the first confirmation information is used to instruct the core network element to complete the bearer change of the inter-site handover. The target base station according to claim 12, wherein the sending unit is further configured to: Sending capability information to the core network element, where the capability information indicates that the target base station supports dual connectivity, and the capability information is used to request the first confirmation information. The target base station according to claim 11, wherein the target base station further comprises: The determining unit is configured to determine that the core network element completes the bearer change of the inter-station handover after the target base station receives the termination identifier from the source base station, and the termination identifier indicates that the terminal is in the source base station. The data transmission carried by the user plane between the core network element and the core network element has ended. The target base station according to claim 11, wherein the target base station further comprises: The starting unit is configured to start a first timer when the target base station sends a second message to the core network element, and the second message is used to instruct the terminal to control between the source base station and the core network element The plane bearer has been changed to the control plane bearer of the terminal between the target base station and the core network element; The determining unit is configured to determine that the core network element completes the bearer change of the inter-site handover when the first timer expires. The target base station according to any one of claims 11 to 15, wherein the target base station further comprises: A starting unit for the target base station to start a second timer; The sending unit is further configured to, when the second timer expires and the target base station does not receive second confirmation information from the core network element, re-send the first acknowledgment information to the core network element A message, the second confirmation information is used to indicate that the core network element has completed the establishment of the user plane bearer of the terminal between the secondary base station and the core network element. A core network element, which is characterized in that it includes: The sending unit is configured to send first confirmation information to the target base station, where the first confirmation information is used to indicate that the core network element has completed the bearer change of the inter-site handover, and the bearer change of the inter-site handover includes the terminal's The user plane bearer between the base station and the core network element is changed to the user plane bearer of the terminal between the target base station and the core network element; The receiving unit is configured to receive a first message from the target base station, where the first message carries the identifier of the secondary base station, and the first message is used to instruct the establishment of the terminal between the secondary base station and the core network element User plane bearer between; The establishment unit is configured to establish a user plane bearer of the terminal between the secondary base station and the core network element according to the first message. The core network element of claim 17, wherein the receiving unit is further configured to: Receiving capability information from the target base station, where the capability information is used to indicate the capability of the target base station to support dual connectivity; The core network element further includes a triggering unit, which is used to complete the inter-site handover bearer of the core network element after the core network element determines the capability of the target base station to support dual connectivity according to the capability information When changing, trigger execution to send the first confirmation information to the target base station. A core network element, which is characterized in that it includes: The receiving unit is configured to receive a first message from a target base station, the first message carrying the identifier of the secondary base station, and the first message is used to instruct the establishment of a user terminal between the secondary base station and the core network element Surface bearing The establishment unit is configured to: when the core network element determines that the bearer change of the inter-site handover is completed, the core network element establishes the terminal between the secondary base station and the core network element according to the first message The user plane bearer of the inter-site handover indicates that the user plane bearer of the terminal between the source base station and the core network element is changed to the user plane of the terminal between the target base station and the core network element Surface bearing. The core network element of claim 19, wherein the core network element further comprises: The buffer unit is configured to buffer the first message after the core network element receives the first message sent by the target base station and before the core network element determines that the bearer change of the inter-station handover is completed. A communication device, characterized by comprising a processor, the processor is coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction in the memory, so that the right The method described in any one of requirements 1 to 6 is executed. A communication device, characterized by comprising a processor, the processor is coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction in the memory, so that the right The method described in claim 7 or 8 is executed. A communication device, characterized by comprising a processor, the processor is coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction in the memory, so that the right The method described in claim 9 or 10 is executed. A communication system, characterized in that the communication system comprises the communication device according to claim 21 and the communication device according to claim 22 or claim 23. A computer-readable storage medium, characterized in that it stores a program or instruction for implementing the method of any one of claims 1 to 6, or stores a program for implementing the method of claim 7 or 8. Or an instruction, or a program or instruction for implementing the method of claim 9 or 10 is stored. A computer program product, characterized in that the program product includes a program, and when the program is run, the method according to any one of claims 1 to 6, or the method according to claim 7 or 8 , Or the method of claim 9 or 10 is executed. A device, characterized in that the device is used to execute the method according to any one of the preceding claims 1 to 6. A device, characterized in that the device is used to execute the method according to claim 7 or 8, or the device is used to execute the method according to claim 9 or 10. A chip, characterized in that the chip includes a processor; the processor is used to run a computer program or instruction to implement the method according to any one of claims 1 to 6, or to implement the method according to claim 7 or 8, or to implement the method according to claim 9 or 10.

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