WO2023241047A1 - Switching control method, and base station and storage medium - Google Patents

Abstract

The present disclosure belongs to the technical field of dual connectivity. Provided are a switching control method, and a base station and a storage medium. The method comprises: acquiring switching request information for indicating dual-connectivity switching, wherein the switching request information comprises bearer indication information of a source-side base station; a target-side base station generating reverse-transmission address information on the basis of the switching request information, and sending the reverse-transmission address information to the source-side base station, such that the source-side base station sends reverse-transmission data and an end marker packet to the target-side base station on the basis of the reverse-transmission address information; and according to the bearer indication information and the end marker packet, the target-side base station receiving the reverse-transmission data which is sent by the source-side base station.

Description

Handover control method, base station and storage medium

Cross-references to related applications

This disclosure claims priority to Chinese patent application CN202210674904.7 titled "Handover control method, base station and storage medium" submitted on June 15, 2022, the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the field of dual connectivity technology, and in particular, to a handover control method, a base station and a storage medium.

Background technique

In the multi-radio dual connectivity (Multi-Radio Dual Connectivity, MR-DC) networking scenario, 5G UE (user equipment) can simultaneously connect to two new radio interfaces (New Radio, NR) or two ng-eNB (connected to 5GC E-UTRA)/NR base station, thereby making full use of the wireless air interface resources of different base stations and increasing the throughput of user equipment.

In the MR-DC mobility scenario, the master node (MN) and secondary node (SN) of the source side base station are required to perform data backtransmission to the target side base station, and send representative feedback when the data backtransmission is completed. Pass the end of the termination identifier (End Marker Packet). However, the data bearing mode of 5G UE can be carried by MN, SN, or both MN and SN. The target side base station cannot identify the scenarios in which it needs to receive the termination identifiers sent by the MN and SN sides, and the scenarios in which it only needs to receive the termination identifiers sent by the MN or SN side, which can easily lead to the loss or handover of reverse transmission data during the dual connection handover process. The delay is extended, and technical problems occur such as traffic drops or interruptions.

Contents of the invention

The present disclosure provides a switching control method, a base station and a storage medium, aiming to avoid the loss of reverse transmission data or prolonged switching delay during dual connection switching, and solve the technical problems of traffic drops and interruptions.

In a first aspect, the present disclosure provides a handover control method, which is applied to a target-side base station. The method includes: obtaining handover request information for instructing dual connection handover. The handover request information includes bearer indication information of the source-side base station. The bearer indication The information is used to instruct the packet data of the wireless bearer to aggregate the information located at the source-side base station; generate reverse transmission address information based on the handover request information, and send the reverse transmission address information to the source-side base station, so that the source-side base station transmits the reverse transmission address information to the source-side base station based on the reverse transmission address information. The target side base station sends the reverse transmission data and the termination identifier, and the termination identifier is used to indicate the end of the reverse transmission data transmission; it receives the reverse transmission data sent by the source side base station according to the bearer indication information and the termination identifier.

In a second aspect, the present disclosure also provides a handover control method, applied to a source-side base station. The method includes: generating handover request information for instructing dual connection handover, where the handover request information includes bearer indication information of the source-side base station, and the bearer The instruction information is used to instruct the packet data of the wireless bearer to aggregate information located at the source side base station; obtain the reverse transmission address information of the target side base station based on the handover request information; send the reverse transmission data and termination identification to the target side base station based on the reverse transmission address information to The target base station is caused to receive the reverse transmission data sent by the source base station according to the bearer indication information and the termination identifier.

In a third aspect, the present disclosure also provides a base station, which includes a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus for realizing connection communication between the processor and the memory, wherein When the computer program is executed by the processor, the steps of any switching control method provided by the embodiments of the present disclosure are implemented.

In a fourth aspect, the present disclosure also provides a storage medium for computer-readable storage, the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to Implement the steps of any switching control method as provided by this disclosure.

Description of the drawings

Figure 1 is a schematic flowchart of steps of a switching control method provided by the present disclosure;

Figure 2 is a schematic flowchart of a sub-step of the switching control method in Figure 1;

Figure 3 is a schematic flowchart of another sub-step of the switching control method in Figure 1;

Figure 4 is a schematic flowchart of steps of another switching control method provided by the present disclosure;

Figure 5 is a schematic diagram of a scenario for implementing the handover control method provided by the present disclosure;

Figure 6 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 7 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 8 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 9 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 10 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 11 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 12 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 13 is a schematic diagram of another scenario for implementing the switching control method provided by the present disclosure;

Figure 14 is a schematic structural block diagram of a base station provided by the present disclosure.

Detailed ways

The technical solutions in this disclosure will be clearly and completely described below with reference to the accompanying drawings in this disclosure. Obviously, the described embodiments are part of the embodiments of this disclosure, rather than all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this disclosure.

The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all contents and operations/steps, nor are they necessarily performed in the order described. For example, some operations/steps can also be decomposed, combined or partially merged, so the actual order of execution may change according to actual conditions.

It should be understood that the terminology used in the description of the disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly dictates otherwise.

In the Multi-Radio Dual Connectivity (MR-DC) networking scenario, the MR-DC networking connected to the 5G core network (5GC) includes NR-DC (NR-NR dual connectivity), NE-DC ( There are three networking modes: NR-E-UTRA dual connectivity) and NGEN-DC (NG-RAN E-UTRA–NR dual connectivity). 5G UE (User Equipment) can be connected to two New Radio (NR) or two ng-eNB (E-UTRA connected to 5GC)/NR base stations at the same time, thus making full use of the wireless air interface resources of different base stations and increasing the number of users. The throughput of the device.

In the MR-DC mobility scenario, that is, MR-DC switching to single connection, or switching from one MR-DC to another MR-DC, the master node (Master Node, MN) and secondary node (Secondary) of the source-side base station are required. Node, SN) performs data backtransmission to the target side base station, and sends an End Marker Packet representing the end of the backtransmission at the end of the data backtransmission. However, the data bearing mode of 5G UE can be carried by MN, SN, or both MN and SN. The target side base station cannot identify the scenarios in which it needs to receive the termination identifiers sent by the MN and SN sides, and the scenarios in which it only needs to receive the termination identifiers sent by the MN or SN side, which can easily lead to the loss or handover of reverse transmission data during the dual connection handover process. The delay is lengthened and traffic drops or is cut off, affecting user experience.

The present disclosure provides a handover control method, a base station and a storage medium. The handover control method can be applied to a base station, which may be a source-side base station or a target-side base station. The source base station includes a source master node MN and a source slave node SN; the target base station includes a target master node MN and a target slave node SN, or the target base station is a target base station, and the target base station is, for example, a target gNB (5G base station).

In the multi-wireless dual-connection MR-DC networking scenario, Split PDU Session bearer and Non Split PDU Session bearer are supported. Among them, the Split PDU Session carries the quality of service flow (Qos Flow) included in a data unit session (PDU Session). There are multiple service data adaptation protocols (service data adaptation protocols) in a radio access network (NG-RAN). SDAP) entity, part of the service quality flow (Qos Flow) is on the MN primary node side, and part of the service quality flow (Qos Flow) is on the SN secondary node side. The Non Split PDU Session bearer means that all quality of service flows (Qos Flow) under a data unit session (PDU Session) are on the MN side or all on the SN side. Therefore, the data bearing mode of 5G UE can be carried by MN, SN, or both MN and SN.

In the dual connection switching scenario of user equipment, it supports switching from dual connection MR-DC to single connection, or switching from one dual connection MR-DC to another dual connection MR-DC. Therefore, the source SN and source MN need to perform data backtransmission to the target gNB, target MN or target SN. For the target MN/target SN/target gNB, you need to receive the End Marker Packet sent by the source MN and the source SN respectively, or you only need to receive the End Marker Packet sent by the source MN or source SN in order to stop the reaction. Receive data packets.

For example, when dual-connection MR-DC is switched to single-connection, both the source SN and the source MN need to perform data backtransmission to the target base station. When one dual-connectivity MR-DC switches to another dual-connectivity MR-DC, there may be a source MN pairing the target MN or Various scenarios in which the target SN performs data backtransmission, the source SN performs data backtransmission to the target MN and target SN, and the source MN performs data backtransmission to the target MN and target SN, and the source SN performs data backtransmission to the target MN or target SN. . Among them, the SN, MN and target base station may be gNB. In some examples, the source MN and the target MN may be the same MN (base station). In other examples, the source SN and the target SN may be the same SN (base station).

When the current source-side base station initiates a dual-connection handover, the target-side base station cannot identify the scenarios in which it needs to receive the end marker End Marker Packet of the source MN and source SN, and the scenarios in which it needs to receive only the end marker End Marker of the source MN or source SN. Packet. If you only receive the termination identifier sent by the source MN or source SN side and stop receiving the reverse transmission data, it will cause the reverse transmission data to be lost, causing ditching or interruption; if you fixedly receive the termination identification sent by the source MN and source SN The termination flag will cause the user plane switching delay to be prolonged, delay the transmission and reception of normal uplink and downlink data, and also cause dropouts or interruptions, affecting the user experience.

Based on this, the target side base station in the present disclosure is used to obtain the handover request information of the dual connection handover. The handover request information includes the bearer indication information of the source side base station, and receives the reverse transmission data and termination identification sent by the source side base station. The termination The identifier is used to indicate the end of sending the reverse transmission data, and then the reverse transmission data sent by the source-side base station is received according to the bearer indication information and the received termination identifier. This enables the target side base station to effectively identify the termination identifier that needs to be received, and control the reception process of the reverse transmission data according to the received termination identifier, avoiding the loss of reverse transmission data or extending the switching delay during the dual connection handover process, and solving the problem of traffic drop. Ditch and disconnection issues.

Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other without conflict.

Please refer to FIG. 1 , which is a schematic flow chart of a handover control method provided by the present disclosure. The handover control method can be applied to a target-side base station.

As shown in Figure 1, the switching control method includes steps S101 to S103.

Step S101: Obtain handover request information for instructing dual connectivity handover, where the handover request information includes bearer indication information of the source-side base station.

In an exemplary embodiment, the user equipment UE accesses the source MN and has added the source SN, that is, the user equipment UE is in the dual connection state, and the source side base station decides to initiate dual connection handover, and then generates handover request information for the dual connection handover, The handover request information is used to control the user equipment UE to switch from dual connectivity MR-DC to single connectivity, or from one dual connectivity MR-DC to another dual connectivity MR-DC. The target base station performs dual connectivity based on the switching request information. The corresponding operation of the switch.

The handover request information includes bearer indication information of the source-side base station. The bearer indication information is also called bearer terminated information in the 5G standard protocol. The bearer indication information is used to indicate that the packet data convergence PDCP of the radio bearer is located at the source side base station. For example, at least one radio bearer PDCP under the MR-DC is located on the source MN side and at least one radio bearer PDCP is located on one side. For example, on The radio bearer PDCPs under MR-DC are all located on the source MN or on the source SN side to indicate whether the target side base station needs to receive the termination identifiers from both the source MN and the source SN at the same time, or only needs to receive the source MN or the source SN. The termination flag sent by the side.

In one embodiment, the MR-DC switches to single connection, the target base station is a target base station, and the target base station and the source MN are different base stations; the source base station generates a dual connection handover based on the bearer indication information of the source base station. The source MN sends the handover request information to the target base station, so that the target base station obtains the handover request information carrying the bearer indication information. In another embodiment, the MR-DC switches to single connection, the target base station is a target base station, and the target base station and the source MN are the same base station; the target base station (source MN) generates a bearer carrying the source side base station Switching request information indicating information, the switching request information is used to indicate dual connection switching.

In an embodiment, the MR-DC is handed over to another MR-DC, and the target side base station includes a target master node MN and a target slave node SN. The source MN generates handover request information for instructing dual connectivity handover. The target MN obtains the handover request information sent by the source MN. The handover request information carries the bearer indication information of the source-side base station. The target MN responds based on the handover request information. Dual connection switching operation.

In an exemplary embodiment, after the target MN obtains the handover request information indicating dual connectivity handover, the target MN sends the add request information to the target SN, and the target SN replies to the target MN with add request confirmation information to establish the relationship between the target MN and the target MN. Communication connections between SNs.

Step S102: Generate reverse transmission address information based on the handover request information, and send the reverse transmission address information to the source-side base station, so that the source-side base station sends reverse transmission data and a termination identifier to the target-side base station based on the reverse transmission address information.

Among them, the reverse transmission address information includes the reverse transmission address of the target side base station, and the termination flag is used to indicate the end of the transmission of the reverse transmission data.

In one embodiment, after acquiring the handover request information carrying the bearer indication information, the target base station generates the reverse transmission address information carrying the reverse transmission address of the target base station, and sends the reverse transmission address information to the source side base station. For example, the target MN generates the backhaul address information based on the handover request information, the backhaul address information includes the backhaul addresses of the target MN and the target SN, and sends the backhaul address information to the source MN and the source SN.

In one embodiment, the MR-DC switches to single connection, the target base station is a target base station, and the target base station generates handover request confirmation information based on the handover request information. The handover request confirmation information carries the reverse transmission address of the target base station; The handover request confirmation information is sent to the source-side base station, so that the source-side base station can initiate data backtransmission to the target-side base station based on the backtransmission address in the handover request confirmation information. The handover request confirmation information can be used as the reverse transmission address information. The handover request confirmation information can carry the reverse transmission address of the target base station. Of course, it can also carry other information that needs to be sent to the source side base station.

In one embodiment, the MR-DC is handed over to another MR-DC. The target base station includes a target MN and a target SN. The target MN generates add request information based on the handover request information and sends the add request information to the target SN; the target The SN replies to the target MN with add request confirmation information. The add request confirmation information includes the reverse transmission address of the target SN. The target MN generates handover request confirmation information based on the handover request information. The handover request confirmation information carries the reverse transmission address of the target SN and the target. The reverse transmission address of the MN; the handover confirmation information is sent to the source-side base station. The handover request confirmation information may be used as the reverse transmission address information carrying the reverse transmission address of the target base station, and the handover request confirmation information may also carry other information besides the reverse transmission address.

It should be noted that the reverse transmission address information is information including the reverse transmission address of the target base station, and the source base station can initiate data reverse transmission to the target base station based on the reverse transmission address information. This disclosure does not specifically limit the specific existence form of the reverse address information. For example, the reverse address information can be switching request confirmation information, Xn-U address indication information, add request confirmation information, release request information, modify request information, add Request information, etc.

In one embodiment, the target side base station sends the reverse transmission address information to the source MN, so that the source MN sends the reverse transmission data to the target side base station based on the reverse transmission address, and sends a termination message to the target side base station when the transmission of the reverse transmission data ends. logo. In another embodiment, the reverse transmission address information is sent to the source SN, so that the source SN sends reverse transmission data to the target side base station based on the reverse transmission address information, and sends a termination identifier to the target side base station when the transmission of the reverse transmission data ends. .

In one embodiment, the target side base station sends the reverse transmission address information to the source MN, so that the source MN sends reverse transmission data to the target side base station based on the reverse transmission address, and the source MN sends the reverse transmission data to the target side base station when the reverse transmission data is completed. Send the termination identifier; the source MN forwards the reverse transmission address information to the source SN, so that the source SN sends the reverse transmission data to the target side base station based on the reverse transmission address information, and the source SN sends the termination to the target side base station when the transmission of the reverse transmission data ends. logo.

In an exemplary embodiment, the MR-DC switches to a single connection, and the target base station sends the reverse transmission address information to the source MN, so that the source MN sends the reverse transmission data and the termination identifier End Marker Packet to the target base station based on the reverse transmission address. . The source MN then sends the reverse transmission address information to the source SN side, so that the source SN side sends the reverse transmission data and the termination identifier End Marker Packet to the target base station based on the reverse transmission address information.

In an exemplary embodiment, the MR-DC switches to another MR-DC, and the target MN sends the backhaul address information to the source MN, so that the source MN sends backhaul to the target MN and the target SN based on the backhaul address information. Data and termination identifier End Marker Packet. The source MN then sends the reverse transmission address information to the source SN side, so that the source SN side sends the reverse transmission data and the termination identifier End Marker Packet to the target MN and the target SN based on the reverse transmission address information.

Step S103: Receive the reverse transmission data sent by the source-side base station according to the bearer indication information and the termination identifier.

It should be noted that, based on different data carrying methods, there are multiple implementation methods in this step. In an exemplary embodiment, when the MR-DC switches to single connection, the target base station receives the reverse transmission data sent by the source MN or source SN according to the bearer indication information and the termination identifier; or, the target base station receives the reverse transmission data sent by the source MN or source SN according to the bearer indication information and the termination identifier. , receiving the reverse transmission data sent by the source MN and source SN. In an exemplary embodiment, the MR-DC switches to another MR-DC, and the target MN or target SN receives the reverse transmission data sent by the source MN or source SN according to the bearer indication information and the termination identifier; or, the target MN and The target SN receives the reverse transmission data sent by the source MN and the source SN according to the bearer indication information and the termination identifier.

In an embodiment, as shown in Figure 2, step S104 includes: sub-steps S1041 to sub-step S1042.

Sub-step S1041: Determine the target termination identifier to be received according to the bearer indication information.

In one embodiment, if the bearer indication information is the bearer indication information of the source MN, then it is determined that the target termination identifier to be received is the termination identifier correspondingly sent by the source MN; if the bearer indication information is the bearer indication information of the source SN, then It is determined that the target termination identifier to be received is the corresponding termination identifier sent by the source SN side.

Among them, the bearer indication information of the source MN is, for example, MN terminated beare (in MR-DC, a radio bearer for which PDCP is located in the MN), that is, under MR-DC, the packet data convergence PDCP of a radio bearer is located on the MN side . The bearer indication information of the source SN is, for example, SN terminated bearer (in MR-DC, a radio bearer for which PDCP is located in the SN), that is, under MR-DC, the packet data convergence PDCP of a radio bearer is located on the SN side.

Sub-step S1042: When the received termination identifier matches the target termination identifier, stop receiving the reverse transmission data sent by the source-side base station.

Among them, if the source side bearer is a MN or SN single-sided bearer, when receiving the termination identifier sent by the source side base station (MN or SN), and the received termination identifier matches the target termination identifier, the reception of the reverse transmission will be stopped. data.

In one embodiment, the target termination identifier is the termination identifier correspondingly sent by the source MN side; when it is determined that the received termination identifier is the corresponding termination identifier sent by the source MN side, it is determined that the received termination identifier matches the target termination identifier, At this time, the target side base station can effectively recognize that it only needs to receive the termination identifier sent by the source side base station, and then stops receiving the reverse transmission data sent by the source side base station to avoid prolonged user plane handover delay and delayed transmission and reception of normal uplink and downlink data. Effectively solve the problem of flow ditching and interruption.

In one embodiment, the target termination identifier is the termination identifier correspondingly sent by the source SN side; when it is determined that the received termination identifier is the corresponding termination identifier sent by the source SN side, it is determined that the received termination identifier matches the target termination identifier, At this time, the target side base station can effectively recognize that it only needs to receive the termination flag sent by the source side base station, and then stops receiving the reverse transmission data sent by the source side base station to avoid the loss of reverse transmission data or the extension of the switching delay during the dual connection handover process.

In an embodiment, as shown in Figure 3, step S104 includes: sub-steps S1043 to sub-step S1045.

Sub-step S1043: Determine the target termination identifier to be received according to the bearer indication information.

In one embodiment, if the bearer indication information includes the bearer indication information of the source MN and the source SN, it is determined that the target termination identifier to be received includes the termination identifiers sent by the source MN and the source SN respectively.

The bearer indication information includes the bearer indication information of the source MN and the bearer indication information of the source SN, which means that under MR-DC, at least one radio bearer PDCP is located on the side of the source MN and at least one radio bearer PDCP is located on the side of the source SN. . That is, among the quality of service flows (Qos Flow) included in a data unit session (PDU Session), part of the quality of service flows (Qos Flow) is on the MN primary node side, and part of the service quality flows (Qos Flow) is on the SN secondary node side.

Sub-step S1044: When the received termination identifier does not match the target termination identifier, continue to receive the reverse transmission data sent by the source-side base station.

Among them, if the source-side bearer is carried by both the MN and SN, when receiving the termination identifier sent by the source-side base station (MN or SN), the received termination identifier does not match the target termination identifier, so it is necessary to continue to receive the response. transfer data.

In one embodiment, the target termination identifier includes the termination identifier sent by the source MN and the source SN respectively; when it is determined that the received termination identifier is the termination identifier sent by the source MN side or the source SN side, the received termination identifier is determined Does not match target termination ID. At this time, the target side base station can effectively identify the need to receive the termination identifier sent by the MN and SN. Therefore, when the received termination identifier does not match the target termination identifier, it continues to receive the reverse transmission data sent by the source side base station.

Sub-step S1045: When the received termination identifier matches the target termination identifier, stop receiving the reverse transmission data sent by the source-side base station.

Among them, if the source-side bearer is carried by both the MN and SN, that is, the bearer indication information includes the bearer indication information of the source MN and the bearer indication information of the source SN. After receiving the termination information sent by both sides of the source-side base station (MN and SN), When identifying, the received termination identifier matches the target termination identifier, so the reception of reverse data is stopped.

In one embodiment, the target termination identifier includes the termination identifier sent by the source MN and the source SN respectively; when it is determined that the received termination identifier includes the termination identifier sent by the source MN and the source SN, it is determined that the received termination identifier is the same as the termination identifier sent by the source MN and the source SN. Target The termination identifier matches. At this time, the target side base station can effectively identify the need to receive the termination identification sent by both the MN and SN. Therefore, when the received termination identification matches the target termination identification, it stops receiving the reverse transmission data sent by the source side base station to avoid the loss of reverse transmission data. , there will be ditching or flow interruption.

In one embodiment, it is determined according to the bearer indication information whether it is necessary to receive the termination identifier sent by the MN and the SN; if it is determined that it is not necessary to receive the termination identifier sent by the MN and the SN, then the termination identifier sent by the MN or SN is received. After the termination identifier is received, stop receiving the reverse transmission data sent by the source-side base station; if it is determined that it is necessary to receive the termination identifier sent by both the MN and SN, then after receiving the termination identifier sent by the MN and SN, stop receiving the source-side base station The data sent in reverse. Based on this, the target side base station can effectively identify the termination identifier that needs to be received, and control the reception process of the reverse transmission data based on the received termination identifier, thereby avoiding the loss of reverse transmission data or extending the switching delay during the dual connection handover process, and effectively solving the problem. Problems with flow drops and interruptions.

In the handover control method provided in the above embodiment, the target base station obtains handover request information for instructing dual connection handover. The handover request information includes the bearer indication information of the source side base station; the target base station generates reverse transmission address information based on the handover request information. , and sends the reverse transmission address information to the source-side base station, so that the source-side base station sends the reverse transmission data and termination identification to the target-side base station based on the reverse transmission address; the target-side base station receives the transmission from the source-side base station based on the bearer indication information and termination identification. back-transmission data. Through the above method, the target base station can effectively identify whether it needs to receive the termination identifier sent by the MN and SN sides of the source base station, or only needs to receive the termination identifier sent by the MN and SN sides of the source base station, avoiding dual connections. The reverse transmission data is lost or the switching delay is extended during the switching process, which solves the problem of traffic drop and interruption.

Please refer to Figure 4. Figure 4 is a schematic flowchart of steps of another handover control method provided by the present disclosure. The handover control method is applied to a source-side base station. The source-side base station includes a source master node MN and a source slave node SN.

As shown in Figure 4, the switching control method includes steps S201 to S203.

Step S201: Generate handover request information for instructing dual connectivity handover, where the handover request information includes bearer indication information of the source-side base station.

Among them, the bearer indication information is used to instruct the packet data of the wireless bearer to aggregate information located at the source-side base station, and the dual connection switching can be performed through the Xn port or the Ng port.

The source master node MN generates handover request information for instructing dual connectivity handover, where the handover request information includes bearer indication information of the source-side base station. For example, the source MN generates handover request information for instructing dual connectivity handover based on the bearer indication information of the source MN and the source SN.

In one embodiment, after generating the handover request information for instructing dual connection handover, the method further includes: the source MN sending release request information to the source SN, and the release request information is used to instruct the source SN to disconnect the communication connection with the source MN. ; The source SN replies to the source MN with release request confirmation information. The release request confirmation information is used to notify the source MN to confirm the disconnection of the communication connection with the source SN. The communication connection between the source MN and the source SN can be accurately disconnected through the release request information and the release confirmation request information, so that a new communication link can be established.

Step S202: Obtain the reverse transmission address information of the target base station based on the handover request information.

In one embodiment, the MR-DC switches to single connection, the target base station is a target base station, and the target base station and the source MN are the same base station; the source MN generates the reverse transmission address information based on the handover request information, and transmits the reverse transmission address Address information is sent to the source SN. In another embodiment, the MR-DC switches to single connection, the target base station is a target base station, and the target base station and the source MN are different base stations; the source MN sends the handover request information to the target base station, so that the target base station The reverse transmission address information is generated based on the handover request information, and the reverse transmission address information is sent to the source MN.

In one embodiment, when the MR-DC switches to another MR-DC, the source MN sends the handover request information to the target base station, so that the target base station generates the reverse address information based on the handover request information and transmits the reverse address information. Sent to source MN. The reverse transmission address information includes the reverse transmission address of the target side base station, for example, the reverse transmission address of the target MN and the target SN.

Step S203: Send the reverse transmission data and the termination identification to the target base station based on the reverse transmission address information, so that the target base station receives the reverse transmission data sent by the source base station according to the bearer indication information and the termination identification.

Among them, the source side base station supports the source SN to send the reverse transmission data to the target side base station through the The back-transmission data is sent to the source MN, and then the source MN back-transmits it to the target gNB and target MN, and the target MN then back-transmits it to the target SN.

It should be noted that the protocol supports the source SN to pass the reverse transmission data to the source MN, and then the source MN forwards it to the target base station. The End Marker Packet can be collected by the source MN and sent to the target side together with the source SN and the source MN.

It should be noted that the source-side base station sends a termination identifier to the target-side base station when the reverse transmission data transmission ends. The target-side base station receives the reverse transmission data sent by the source-side base station according to the bearer indication information and the termination identifier, so that the target-side base station can effectively Identify whether it is necessary to receive the termination identification sent by the source MN and the source SN, or whether it is only necessary to receive the termination identification sent by the source MN and the source SN to avoid the loss of backtransmission data or the extension of the switching delay during the dual connection handover process. Solve the problem of flow ditching and interruption.

In one embodiment, the source MN sends reverse transmission data to the target base station based on the reverse transmission address information, and sends a termination identifier to the target base station when the transmission of the reverse transmission data ends. In another embodiment, the source SN sends reverse transmission data to the target base station based on the reverse transmission address information, and sends a termination identifier to the target base station when the transmission of the reverse transmission data ends.

In one embodiment, the target side base station sends the reverse transmission address information to the source MN, the source MN sends the reverse transmission data to the target side base station based on the reverse transmission address, and sends a termination identifier to the target side base station when the transmission of the reverse transmission data ends; The source MN forwards the reverse transmission address information to the source SN, the source SN sends the reverse transmission data to the target base station based on the reverse transmission address, and the source SN sends a termination identifier to the target side base station when the transmission of the reverse transmission data ends.

The handover control method provided in the above embodiments generates handover request information for instructing dual connection handover. The handover request information includes bearer indication information of the source-side base station; obtains the reverse transmission address information of the target-side base station based on the handover request information; based on the reverse transmission The address information sends the reverse transmission data to the target side base station, and sends a termination identifier when the transmission of the reverse transmission data ends, so that the target side base station receives the reverse transmission data sent by the source side base station according to the bearer indication information and the termination identification. In this way, the target base station can effectively identify the termination identifier that needs to be received, and control the reception process of the reverse transmission data based on the received termination identifier, thereby avoiding the loss of reverse transmission data or the extension of the switching delay during the dual connection handover process. , solve the problem of flow ditching and interruption.

The following takes the dual connection handover process that supports Split PDU Session bearer in the MR-DC networking scenario as an example. That is, the bearer indication information of the source-side base station includes the bearer indication information of the source MN and the bearer indication information of the source SN. In MR-DC At least one radio bearer PDCP is located on the side of the source MN and at least one radio bearer PDCP is located on the side of the source SN. Both the source MN and the source SN participate in data backtransmission. Specific examples are explained through the following Figures 5 to 13.

In one embodiment, the UE accesses the source MN and has added the SN. Xn handover occurs to the target base station, and the target base station does not add the SN, that is, the MR-DC switches to single connection through Xn. Take the target base station without adding SN as an example for illustration, as shown in Figure 5. The specific implementation steps are as follows.

1. The source MN sends handover request information for instructing dual connectivity handover to the target base station. The handover request information carries bearer indication information. The bearer indication information may also be called bearer terminated information of the source-side base station.

2. The target base station returns the handover request confirmation message to the source MN. The handover request confirmation message carries the reverse transmission address of the target base station.

3. The source MN sends release request information to the source SN. At the same time, the source MN starts data backtransmission based on the backtransmission address in the handover request confirmation information, that is, sends the backtransmission data to the target base station.

4. The source SN replies to the source MN with release request confirmation information.

5. The source MN sends Xn-U address indication information (Xn-U ADDRESS INDICATION) to the source SN. The Xn-U address indication information carries the reverse transmission address of the target base station. The source SN starts data reverse transmission based on the reverse transmission address, that is, to The target base station sends backtransmission data.

6. After the source MN and source SN receive the termination identifier End Marker Packet sent by the core network (5GC), the source MN and the source SN send the termination identifier End Marker Packet to the target base station respectively. The target base station receives the terminated information and termination identifier based on the carrying information. The reverse transmission data sent by the source MN and source SN respectively.

In one embodiment, the UE accesses the source MN and has added an SN. Xn handover occurs to the target MN, and the SN selected by the target MN is the source SN, that is, the MR-DC is handed over to another MR-DC through Xn, and the MN changes but SN remains unchanged. Taking adding the SN to the target MN as an example for explanation, as shown in Figure 6, the specific implementation steps are as follows.

1. The source MN sends handover request information for instructing dual connectivity handover to the target MN. The handover request information carries the bearer terminated information of the source-side base station.

2. The target SN selected by the target MN is the same SN as the source SN, and the target MN sends the add request information to the SN.

3. The SN replies to the target MN with the add request confirmation message.

4. The target MN sends a handover request confirmation message to the MN. The handover request confirmation message carries the reverse transmission address of the target MN. In one embodiment, the target MN sends an Xn-U address indication message to the SN to establish a connection between the target MN and the SN. communication link.

5. The source MN sends release request information to the SN, and the source MN initiates data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target MN; in some embodiments, the source MN also sends the reverse transmission data to the SN.

6. The SN replies to the source MN with release request confirmation information.

7. The source MN sends Xn-U address indication information to the SN. The Xn-U address indication information carries the reverse transmission address of the target MN. The SN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target MN.

8. After the source MN and SN receive the End Marker Packet sent by the core network (5GC), the source MN sends the End Marker Packet to the SN and the target MN, and the SN sends the End Marker Packet to the target MN. The SN stops receiving the reverse transmission data when receiving the termination identifier sent by the source MN. The target MN receives the reverse transmission data sent by the source MN and SN based on the terminated information and termination identifier.

In one embodiment, the UE accesses the source MN and has added an SN. Xn handover occurs to the target MN, and the SN selected by the target MN is different from the source SN, that is, the MR-DC is handed over to another MR-DC through Xn. Both MN and SN change. Taking adding the target SN to the target MN as an example, as shown in Figure 7, the specific implementation steps are as follows.

1. The source MN sends handover request information to the target MN. The handover request information carries the bearer terminated information of the source-side base station.

2. The SN selected by the target MN is different from the source SN, and the target MN sends an add request message to the target SN.

3. The target SN replies to the target MN with the add request confirmation message.

4. The target MN sends a handover request confirmation message to the source MN. The handover request confirmation message carries the reverse transmission addresses of the target MN and the target SN. In one embodiment, the target MN sends an Xn-U address indication message to the target SN to establish the target MN. Communication link between MN and target SN.

5. The source MN sends release request information to the source SN, and the source MN initiates data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target MN; in some embodiments, the source MN also sends the reverse transmission data to the target SN.

6. The source SN replies to the source MN with release confirmation information.

7. The source MN sends Xn-U address indication information to the source SN. The Xn-U address indication information carries the reverse transmission address. The source SN starts the data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target SN; in In some embodiments, the source SN also sends backtransmission data to the target MN.

8. After the source MN and source SN receive the termination identifier End Marker Packet sent by the core network (5GC), the source MN sends the termination identifier End Marker Packet to the target SN and target MN, and the source SN sends the termination identifier End to the target SN and target MN. Marker Packet, the target SN and the target MN receive the reverse transmission data sent by the source MN and the source SN based on the terminated information and the termination identifier (End Marker Packet).

It should be noted that in some embodiments, after the target MN sends the handover request confirmation information to the source MN, the target MN sends Xn-U address indication information to the target SN, and the Xn-U address indication information carries the communication address of the target MN ( Such as DU address) to establish a communication link between the target MN and the target SN.

In one embodiment, the UE accesses the source MN and has added the SN. Ng handover occurs to the target base station, and the target base station does not add the SN, that is, the MR-DC switches to single connection through Ng. The target base station does not add an SN as an example for explanation, as shown in Figure 8. The specific implementation steps are as follows.

1. The source MN generates handover request information for instructing dual connectivity handover. The handover request information carries the bearer terminated information of the source-side base station, and sends the handover request information to the source core network (source 5GC).

2. The source core network forwards the handover request information to the target core network (target 5GC), and the target core network forwards the handover request information to the target base station.

3. The target base station does not add an SN and replies with a handover request confirmation message to the target core network. The handover request confirmation message carries the reverse transmission address of the target base station.

4. The target core network forwards the handover request confirmation information to the source core network, and the source core network sends the handover command to the source MN.

5. The source MN sends a release request message to the source SN, and at the same time, the source MN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target base station.

6. The source SN replies to the source MN with release request confirmation information.

7. The source MN sends Xn-U address indication information to the source SN. The Xn-U address indication information carries the reverse transmission address of the target base station. The source SN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target base station.

8. After the source MN and source SN receive the termination identifier End Marker Packet sent by the source core network, the source MN forwards the termination identifier End Marker Packet through the target core network, and the source SN sends the termination identifier End Marker Packet to the target base station. The target base station carries the terminated information and termination identification, and receive the reverse transmission data sent by the source MN and source SN respectively.

In one embodiment, the UE accesses the source MN and has added an SN. Ng handover occurs to the target MN, and the SN selected by the target MN is the source SN, that is, the MR-DC is handed over to another MR-DC through Ng, and the MN changes but SN remains unchanged. Taking adding the SN to the target MN as an example for explanation, as shown in Figure 9, the specific implementation steps are as follows.

1. The source MN generates handover request information for instructing dual connectivity handover. The handover request information carries the bearer terminated information of the source-side base station, and sends the handover request information to the source core network (source 5GC).

2. The source 5GC forwards the handover request information to the target core network (target 5GC), and the target core network forwards the handover request information to the target MN.

3. The target MN selects the same SN as the source SN, and sends the add request information to the SN. The add request information carries the bearer terminated information of the source side base station.

4. The SN replies to the target MN with the add request confirmation message.

5. The target MN sends handover request confirmation information to the target core network (target 5GC). The handover request confirmation information carries the reverse transmission address of the target MN.

6. The target core network forwards the handover request confirmation message to the source core network (source 5GC), and the source core network sends the handover request confirmation message to the source MN.

7. The source MN sends release request information to the SN, and at the same time, the source MN starts data backtransmission based on the backtransmission address, that is, sends the backtransmission data to the target MN through the source core network and the target core network; in some embodiments, the source MN also SN sends reverse data.

8. The source SN replies to the source MN with release confirmation information.

9. The source MN sends Xn-U address indication information to the source SN. The Xn-U address indication information carries the reverse transmission address of the target MN. The source SN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target MN. .

10. After the source MN and source SN receive the End Marker Packet sent by the source core network, the source MN sends the End Marker Packet to the SN, and the source MN sends the End Marker to the target MN through the source core network and the target core network. Packet, the SN sends the termination identifier End Marker Packet to the target MN. The SN stops receiving the reverse transmission data when it receives the termination identifier sent by the source MN. The target MN receives the reverse transmission data sent by both the source MN and the SN based on the terminated information and the received termination identifier (End Marker Packet).

In one embodiment, the UE accesses the source MN and has added an SN. Ng handover occurs to the target MN, and the SN selected by the target MN is different from the source SN, that is, the MR-DC is handed over to another MR-DC through Ng. Both MN and SN change. Taking adding the target SN to the target MN as an example, as shown in Figure 10, the specific implementation steps are as follows.

1. The source MN generates handover request information for instructing dual connectivity handover. The handover request information carries the bearer terminated information of the source-side base station, and sends the handover request information to the source core network (source 5GC).

2. The source 5GC forwards the handover request information to the target core network (target 5GC), and the target core network forwards the handover request information to the target MN.

3. The SN selected by the target MN is different from the source SN. The target MN sends an add request message to the target SN. The add request message carries the bearer terminated information of the source side base station.

4. The target SN replies to the target MN with the addition confirmation message.

5. The target MN sends handover request confirmation information to the target core network (target 5GC), and the handover request confirmation information carries With the reverse transmission address of the target MN and the target SN; in one embodiment, the target MN sends an Xn-U address indication message to the target SN to establish a communication link between the target MN and the target SN.

6. The target core network forwards the handover request confirmation message to the source core network (source 5GC), and the source core network sends the handover request confirmation message to the source MN.

7. The source MN sends release request information to the SN, and at the same time, the source MN starts data backtransmission based on the backtransmission address, that is, sends the backtransmission data to the target MN through the source core network and the target core network; in some embodiments, the source MN also The target SN sends backtransmission data.

8. The source SN replies to the source MN with release confirmation information.

9. The source MN sends Xn-U address indication information to the source SN. The Xn-U address indication information carries the reverse transmission address of the target MN. The source SN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target MN. .

10. After the source MN and source SN receive the End Marker Packet sent by the source core network, the source MN sends the End Marker Packet to the target MN and target SN through the source core network and the target core network. The source SN passes the source core network and the target core network sends the End Marker Packet to the target MN and target SN. The target MN and target SN receive the reverse transmission data sent by the source MN and source SN based on the bearer terminated information and the received termination identifier.

In one embodiment, the UE accesses the MN and has added an SN. Intra-site handover occurs, and no SN is added to the target cell. That is, the MR-DC handover is single connection, and the target cell in the MN changes. Taking the target cell without adding SN as an example, as shown in Figure 11, the specific implementation steps are as follows.

1. The MN decides to initiate intra-site handover and does not choose to add an SN. The MN generates handover request information. The handover request information includes the SN release request information and the bearer terminated information. The MN sends the release request information to the SN.

2. The SN replies to the MN with a release request confirmation message.

3. The MN sends Xn-U address indication information to the SN. The Xn-U address indication information carries the MN's reverse transmission address, and the SN performs data reverse transmission to the MN based on the reverse transmission address.

4. The MN sends handover reconfiguration information to the user equipment UE. The handover reconfiguration information includes record information of the dual connection handover process.

5. After the core network 5GC sends the End Marker Packet to the SN, the SN sends the termination identifier End Marker Packet to the MN. The MN stops receiving the reverse transmission data based on the terminated information and the termination identifier. For example, the MN stops when it receives the termination identifier sent by the SN. To receive reverse transmission data, there is no need to wait to receive reverse transmission data sent by other base stations.

In one embodiment, the UE accesses the MN and has added an SN. Intra-site handover occurs, and the target cell selects the same SN. That is, the MN and SN do not change during the MR-DC handover process, but the target cells of the MN and SN are not changed. changes occur. Taking the target cell selecting the SN as an example for explanation, as shown in Figure 12, the specific implementation steps are as follows.

1. The MN decides to initiate an intra-site handover. The SN selected by the MN is the same as the source SN, but the target cell is different. The MN generates handover request information. The handover request information includes the SN modification request information and the bearer terminated information. The MN sends the modification request information to the SN. and carries terminated information.

2. The SN replies to the MN with a modification request confirmation message. The modification request confirmation message carries the SN's reverse transmission address. The MN initiates data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the SN.

3. The MN sends the Xn-U address indication information to the SN. The Xn-U address indication information carries the MN's reverse transmission address. The SN performs data reverse transmission to the MN based on the reverse transmission address, that is, sends the reverse transmission data to the MN.

4. The MN sends handover reconfiguration information to the user equipment UE. The handover reconfiguration information includes record information of the dual connection handover process.

5. After the core network 5GC sends the End Marker Packet to the SN and MN, the SN sends the termination identifier End Marker Packet to the MN, and the MN sends the termination identifier End Marker Packet to the SN. The MN and SN respectively stop receiving based on the terminated information and termination identifier. Reverse transmission data, for example, the MN stops receiving the reverse transmission data when it receives the termination identification sent by the SN, and the SN stops receiving the reverse transmission data when it receives the termination identification sent by the MN.

In one embodiment, the UE accesses the MN and has added an SN. Intra-site handover occurs, and the target cell selects an SN different from the source SN. That is, the MN does not change during the MR-DC handover process, but the SN changes. Taking intra-site handover to select the SN as an example, as shown in Figure 13, the specific implementation steps are as follows.

1. The MN decides to initiate an intra-site handover. The target SN selected by the MN is different from the source SN. The MN generates handover request information. The handover request information includes the SN's add request information and the bearer terminated information. The MN sends the add request information and the bearer terminated information to the target SN. .

2. The target SN replies to the MN with an add request confirmation message. The add request confirmation message carries the target SN's reverse transmission address. The MN starts data reverse transmission based on the reverse transmission address, that is, sends the reverse transmission data to the target SN.

3. The MN sends a release request message to the source SN; in one embodiment, the target MN sends an Xn-U address indication message to the target SN to establish a communication link between the target MN and the target SN.

4. The source SN replies to the MN with a release request confirmation message.

5. The MN sends Xn-U address indication information to the source SN. The Xn-U address indication information carries the reverse transmission addresses of the MN and the target SN. The SN performs data reverse transmission to the MN and the target SN based on the reverse transmission address, that is, to the MN. , the target SN sends the reverse transmission data.

6. The MN sends handover reconfiguration information to the user equipment UE. The handover reconfiguration information includes record information of the dual connection handover process.

7. After the core network (5GC) sends the End Marker Packet to the source SN and the MN, the source SN sends the termination identifier End Marker Packet to the MN and the target SN, and the MN sends the termination identifier End Marker Packet to the target SN. The MN and the target SN each respond according to Carrying the terminated information and termination identifier, it stops receiving the reverse data. For example, the MN stops receiving the reverse data when it receives the termination identifier sent by the source SN. The target SN stops receiving the reverse data when it receives the termination identifier sent by the source SN and MN. transfer data.

It should be noted that in the MR-DC networking scenario, for non-Split PDU Session bearers, the bearer indication information of the source-side base station is the bearer indication information of the source MN (bearer terminated information), and only the source MN performs data backtransmission, source The SN does not perform data reverse transmission; or, the bearer indication information of the source side base station is the bearer indication information (bearer terminated information) of the source SN, the source SN performs data reverse transmission, and the source MN does not perform data reverse transmission. It is understandable that the specific implementation steps of the above embodiments can be referred to for the dual connection switching process supporting non-Split PDU Session bearers, which will not be described again here.

Please refer to Figure 14, which is a schematic structural block diagram of a base station provided by the present disclosure.

As shown in Figure 14, the base station 300 includes a processor 301 and a memory 302. The processor 301 and the memory 302 are connected through a bus 303, which is, for example, an I2C (Inter-integrated Circuit) bus.

The base station 300 may be a source-side base station or a target-side base station. The source base station includes a source master node MN and a source slave node SN; the target base station includes a target master node MN and a target slave node SN, or the target base station is a target base station, and the target base station is, for example, a target gNB (5G base station).

In an exemplary embodiment, the processor 301 is used to provide computing and control capabilities to support the operation of the entire base station. The processor 301 can be a central processing unit (Central Processing Unit, CPU). The processor 301 can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC). ), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general processor may be a microprocessor or the processor may be any conventional processor.

In an exemplary embodiment, the memory 302 may be a Flash chip, a read-only memory (ROM, Read-Only Memory) disk, an optical disk, a USB disk, a mobile hard disk, or the like.

Those skilled in the art can understand that the structure shown in Figure 14 is only a block diagram of a partial structure related to the present disclosure, and does not constitute a limitation on the base station to which the present disclosure is applied. Specific base stations may include those in the figure. More or fewer parts are shown, or certain parts are combined, or have different parts arrangements.

Wherein, the processor is used to run a computer program stored in the memory, and implement any one of the switching control methods provided by this disclosure when executing the computer program.

In one embodiment, the handover control method is applied to the target side base station, and the processor is used to run a computer program stored in the memory, and implement the following steps when executing the computer program: obtain handover request information used to indicate dual connection handover, handover The request information includes bearer indication information of the source-side base station. The bearer indication information is used to instruct the packet data of the wireless bearer to aggregate information located at the source-side base station; generate reverse transmission address information based on the handover request information, and send the reverse transmission address information to the source side base station, so that the source side base station sends reverse transmission data and a termination identifier to the target side base station based on the reverse transmission address information. The termination identifier is used to indicate the end of the reverse transmission data transmission; according to the bearer indication information and the termination identifier, receive the reverse transmission data sent by the source side base station Transmit data back.

In one embodiment, when receiving the reverse transmission data sent by the source-side base station according to the bearer indication information and the termination identifier, the processor is configured to: determine the target termination identifier to be received according to the bearer indication information; upon the termination of the reception When the identifier matches the target termination identifier, stop receiving the reverse transmission data sent by the source-side base station.

In one embodiment, after determining the target termination identifier to be received based on the bearer indication information, the processor is also configured to: when the received termination identifier does not match the target termination identifier, continue to receive the response sent by the source-side base station. transfer data.

In one embodiment, when the processor implements that the source side base station includes the source primary node MN and the source secondary node SN; when determining the target termination identifier to be received according to the bearer indication information, the processor is used to implement: if the bearer indication information includes the source MN's If the bearer indication information is the bearer indication information of the source SN, then it is determined that the target termination identifier to be received includes the termination identifier sent by both sides of the source MN and the source SN; if the bearer indication information is the bearer indication information of the source MN, then it is determined that the target termination identifier to be received is the bearer indication information of the source MN. The target termination identification is the termination identification correspondingly sent by the source MN side; if the bearer indication information is the bearer indication information of the source SN, it is determined that the target termination identification to be received is the termination identification correspondingly sent by the source SN side.

In one embodiment, when the processor implements sending the reverse transmission address information to the source-side base station so that the source-side base station sends the reverse transmission data and the termination identifier to the target-side base station based on the reverse transmission address information, the processor is configured to implement: The transmission address information is sent to the source MN, so that the source MN sends the reverse transmission data to the target side base station based on the reverse transmission address information, and sends a termination identifier to the target side base station when the transmission of the reverse transmission data ends; and/or the reverse transmission address information is sent to the source MN. Sent to the source SN, so that the source SN sends reverse transmission data to the target side base station based on the reverse transmission address information, and sends a termination identifier to the target side base station when the transmission of the reverse transmission data ends.

In an embodiment, the target base station includes one target base station; or the target base station includes a target master node MN and a target secondary node SN.

In one embodiment, the handover control method is applied to the source-side base station, and the processor is configured to run a computer program stored in the memory, and implement the following steps when executing the computer program: generate handover request information for indicating dual connection handover, handover The request information includes the bearer indication information of the source-side base station. The bearer indication information is used to instruct the packet data of the wireless bearer to aggregate information located at the source-side base station; obtain the reverse transmission address information of the target-side base station based on the handover request information; The target side base station sends the reverse transmission data and sends a termination identifier when the transmission of the reverse transmission data ends, so that the target side base station receives the reverse transmission data sent by the source side base station according to the bearer indication information and the termination identifier.

In one embodiment, the source side base station includes a source master node MN and a source secondary node SN; when the processor implements sending the reverse transmission data and the termination identification to the target side base station based on the reverse transmission address information, the processor is used to implement: the source MN based on the reverse transmission address information. The source SN sends the reverse transmission data to the target base station based on the reverse transmission address information, and sends a termination identifier to the target side base station when the reverse transmission data transmission is completed; and/or the source SN sends the reverse transmission data to the target side base station based on the reverse transmission address information, and sends the reverse transmission data to the target side base station at the end of the reverse transmission data transmission. When the data transmission is completed, a termination identifier is sent to the target base station.

In one embodiment, when the processor obtains the reverse transmission address information of the target side base station based on the handover request information, the processor is configured to: the source MN generates the reverse transmission address information based on the handover request information, and sends the reverse transmission address information to the source SN; or the source MN sends the handover request information to the target base station, so that the target base station generates the reverse address information based on the handover request information, and sends the reverse address information to the source MN.

In one embodiment, after generating the handover request information for instructing dual connection handover, the processor is also configured to: the source MN sends release request information to the source SN, and the release request information is used to instruct the source SN to disconnect from the source SN. Communication connection between MNs; the source SN replies to the source MN with release request confirmation information, and the release request confirmation information is used to notify the source MN to confirm the disconnection of the communication connection with the source SN.

It should be noted that those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the base station described above can be referred to the corresponding process in the aforementioned handover control method embodiment, and will not be described again here. .

The present disclosure also provides a storage medium for computer-readable storage. The storage medium stores one or more programs. The one or more programs can be executed by one or more processors to implement the present disclosure. Steps to switch control methods for any of the provided options.

The storage medium may be an internal storage unit of the base station in the aforementioned embodiment, such as a hard disk or memory of the base station. storage The medium can also be an external storage device of the base station, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SD) card, a flash card (Flash Card), etc. equipped on the base station.

The present disclosure provides a handover control method, a base station and a storage medium. In the present disclosure, the target base station obtains handover request information indicating dual connection handover. The handover request information includes the bearer indication information of the source side base station; the target base station based on the handover request The information generates the reverse transmission address information, and sends the reverse transmission address information to the source side base station, so that the source side base station sends the reverse transmission data and termination identification to the target side base station based on the reverse transmission address information; the target side base station uses the bearer indication information and termination identifier, to receive the reverse transmission data sent by the source side base station. Through the above method, during the MR-DC dual connection handover process, the target base station can effectively identify whether it needs to receive the termination identifiers sent by the MN and SN in the source base station, or whether it only needs to receive the MN and SN in the source base station. The termination flag sent by one side avoids the loss of reverse transmission data or prolonged switching delay during dual connection switching, and solves the problem of traffic drop and interruption.

Those of ordinary skill in the art can understand that all or some steps, systems, and functional modules/units in the devices disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. Components execute cooperatively. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The above serial numbers of the present disclosure are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person familiar with the technical field can easily think of various equivalent methods within the technical scope disclosed in the present disclosure. Modifications or substitutions, these modifications or substitutions should be covered by the protection scope of this disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims (12)

1. A handover control method, applied to a target side base station, the method includes:

   Obtain handover request information for instructing dual connectivity handover, where the handover request information includes bearer indication information of the source-side base station, and the bearer indication information is used to indicate that the packet data of the wireless bearer converges with information located at the source-side base station;

   Generate reverse transmission address information based on the handover request information, and send the reverse transmission address information to the source side base station, so that the source side base station sends reverse transmission to the target side base station based on the reverse transmission address information. Transmission data and a termination identifier, the termination identifier is used to indicate the end of sending the reverse transmission data;

   According to the bearer indication information and the termination identifier, the reverse transmission data sent by the source-side base station is received.
2. The handover control method according to claim 1, wherein receiving the reverse transmission data sent by the source-side base station according to the bearer indication information and the termination identifier includes:

   Determine the target termination identifier to be received according to the bearer indication information;

   When the received termination identifier matches the target termination identifier, stop receiving the reverse transmission data sent by the source-side base station.
3. The handover control method according to claim 2, wherein after determining the target termination identifier to be received according to the bearer indication information, the method further includes:

   When the received termination identifier does not match the target termination identifier, continue to receive the reverse transmission data sent by the source-side base station.
4. The handover control method according to claim 2, wherein the source side base station includes a source master node MN and a source secondary node SN; and determining the target termination identifier to be received according to the bearer indication information includes:

   If the bearer indication information includes the bearer indication information of the source MN and the source SN, it is determined that the target termination identifier to be received includes the termination identifier sent by both the source MN and the source SN;

   If the bearer indication information is the bearer indication information of the source MN, it is determined that the target termination identifier to be received is the termination identifier correspondingly sent by the source MN side;

   If the bearer indication information is the bearer indication information of the source SN, it is determined that the target termination identifier to be received is the termination identifier correspondingly sent by the source SN side.
5. The handover control method according to claim 1, wherein the sending the reverse transmission address information to the source side base station causes the source side base station to send the reverse transmission address information to the target side base station based on the reverse transmission address information. Send backtransmission data and termination flags, including:

   Send the reverse transmission address information to the source MN, so that the source MN sends reverse transmission data to the target side base station based on the reverse transmission address information, and sends the reverse transmission data to the target when the transmission of the reverse transmission data ends. The side base station sends a termination identifier; and/or sends the reverse transmission address information to the source SN, so that the source SN sends reverse transmission data to the target side base station based on the reverse transmission address information, and in the reverse transmission When the data transmission is completed, a termination identifier is sent to the target side base station.
6. The handover control method according to any one of claims 1-5, wherein the target base station includes a target base station; or

   The target side base station includes a target master node MN and a target secondary node SN.
7. A handover control method, applied to source-side base stations, the method includes:

   Generate handover request information for instructing dual connectivity handover, where the handover request information includes bearer indication information of the source-side base station, and the bearer indication information is used to indicate that the packet data of the wireless bearer converges with information located at the source-side base station. ;

   Obtain the reverse transmission address information of the target side base station based on the handover request information;

   Send reverse transmission data and a termination identifier to the target base station based on the reverse transmission address information, so that the target base station receives the reverse transmission sent by the source base station according to the bearer indication information and the termination identifier. data.
8. The handover control method according to claim 7, wherein the source base station includes a source master node MN and a source secondary node SN; and the reverse transmission data and termination are sent to the target base station based on the reverse transmission address information. Logo, including:

   The source MN sends reverse transmission data to the target base station based on the reverse transmission address information, and sends a termination identifier to the target base station when the transmission of the reverse transmission data ends; and/or

   The source SN sends reverse transmission data to the target side base station based on the reverse transmission address information, and when the reverse transmission data is sent At the end, a termination identifier is sent to the target base station.
9. The handover control method according to claim 8, wherein the obtaining the reverse transmission address information of the target base station based on the handover request information includes:

   The source MN generates reverse transmission address information based on the handover request information, and sends the reverse transmission address information to the source SN; or

   The source MN sends the handover request information to the target base station, so that the target base station generates reverse transmission address information based on the handover request information, and sends the reverse transmission address information to the source MN.
10. The handover control method according to claim 8, wherein after generating the handover request information indicating dual connection handover, it further includes:

    The source MN sends release request information to the source SN, where the release request information is used to instruct the source SN to disconnect the communication connection with the source MN;

    The source SN replies to the source MN with release request confirmation information, and the release request confirmation information is used to notify the source MN to confirm the disconnection of the communication connection with the source SN.
11. A base station, including a target side base station or a source side base station; the base station includes a processor, a memory, a computer program stored on the memory and executable by the processor, and a computer program for implementing the processor and the A data bus is used for connection and communication between memories, and when the computer program is executed by the processor, the steps of the switching control method according to any one of claims 1 to 10 are implemented.
12. A storage medium for computer-readable storage, the storage medium stores one or more programs, the one or more programs can be executed by one or more processors to implement any of claims 1 to 10 The step of switching control method described in one item.