CN116017416A

CN116017416A - Data forwarding method and device

Info

Publication number: CN116017416A
Application number: CN202111226288.0A
Authority: CN
Inventors: 刘爱娟; 周叶
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2023-04-25

Abstract

The invention provides a data forwarding method and a device, and the method comprises the following steps: the method comprises the steps that a first main base station sends a first request message to a first auxiliary base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station; a first main base station acquires the address sent by a first auxiliary base station; the first main base station sends the address to a target base station; the first main base station is a source main base station connected with the terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a base station connected with the terminal after the terminal is switched from the double-connection state to the single-connection state; or the first main base station is a main base station connected with the terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a target auxiliary base station connected with the terminal after the auxiliary base station is changed in the double-connection state.

Description

Data forwarding method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data forwarding method and apparatus.

Background

In a long term evolution (Long Term Evolution, LTE) system, an Evolved UMTS terrestrial radio access network (Evolution UMTS Terrestrial Radio Access Network, E-UTRAN) is composed of a plurality of Evolved Node bs (enodebs), the enodebs are connected to a 4G core network (Evolved Packet Core, EPC) through an S1 interface, the enodebs are connected to each other through an X2 interface, and in order to support higher data throughput, a terminal device (UE, also referred to as a User Equipment) can implement dual connection through two enodebs. In a 5G system, as well, multi-radio access technology (Radio Access Technology, RAT) dual connectivity (MR-DC) of eNodeB and gNB and dual connectivity of gNB and gNB are supported, similar to dual connectivity of LTE system.

Currently, in a scenario where the UE is switched from dual connectivity to single connectivity or in a scenario where the secondary base station is changed in dual connectivity, the target base station may discard data forwarded from the source secondary base station.

Disclosure of Invention

The invention aims to provide a data forwarding method and device, which are used for solving the problem that a target base station discards data forwarded by a source auxiliary base station in a scene that a terminal is switched from a double connection state to a single connection state or the auxiliary base station is changed.

In order to achieve the above object, the present invention provides a data forwarding method, including:

a first main base station sends a first request message to a first auxiliary base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station;

the first main base station acquires the address sent by the first auxiliary base station;

the first main base station sends the address to a target base station;

the first main base station is a source main base station connected with a terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a base station connected with the terminal after the terminal is switched from the double-connection state to the single-connection state;

or the first main base station is a main base station connected with the terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a target auxiliary base station connected with the terminal after the auxiliary base station is changed in the double-connection state.

Optionally, the first master base station sends the address to a target base station, including:

the first main base station sends a first switching request message to a Mobility Management Entity (MME), and an access and mobility management function (AMF) sends the address to the target base station based on the first switching request message;

The first switching request message carries an instruction of directly forwarding data and an address of directly forwarding data by the first auxiliary base station.

the first main base station sends a second switching request message to the target base station, wherein the second switching request message carries an address for directly forwarding data by the first auxiliary base station.

and the first main base station sends an auxiliary base station adding request message to the target auxiliary base station, wherein the auxiliary base station adding request message carries an address for directly forwarding data by the first auxiliary base station.

The embodiment of the invention also provides a data forwarding method, which comprises the following steps:

a first auxiliary base station receives a first request message sent by a first main base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data by the first auxiliary base station;

the first auxiliary base station sends the address to the first main base station according to the first request message;

the first main base station is a main base station connected with the terminal in a double-connection state, and the first auxiliary base station is an auxiliary base station connected with the terminal in the double-connection state.

Optionally, the first request message is an auxiliary base station change request message, and the first request message carries an identifier of a target base station;

the target base station is a base station connected after the terminal is switched from the double-connection state to the single-connection state; or the target base station is a target auxiliary base station connected after the auxiliary base station is changed in the double-connection state by the terminal.

The embodiment of the invention also provides a data forwarding method, which is characterized by comprising the following steps:

the target base station obtains an address for directly forwarding data by the first auxiliary base station;

the target base station adds the address to a first base station address list, wherein the first base station address list is a list of addresses of base stations to which the target base station can be connected;

the target base station is a base station connected after the terminal is switched from a double-connection state to a single-connection state;

or the target base station is a target auxiliary base station connected after the auxiliary base station is changed in the double-connection state by the terminal.

Optionally, the target base station obtains an address of the first auxiliary base station for directly forwarding data, including:

acquiring a third switching request message sent by an AMF, wherein the third switching request message is sent by the AMF based on a first switching request message sent by a first main base station to an MME, and the third switching request message and the first switching request message both carry addresses for directly forwarding data by the first auxiliary base station;

Or, a second switching request message sent by a first main base station is obtained, wherein the second switching request message carries an address for directly forwarding data by the first auxiliary base station;

or, acquiring an auxiliary base station adding request message sent by the first main base station, wherein the auxiliary base station adding request message carries an address for directly forwarding data by the first auxiliary base station.

The embodiment of the invention also provides a data forwarding device which is applied to the first main base station and comprises a memory, a transceiver and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

a first request message is sent to a first auxiliary base station through a transceiver, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station;

acquiring the address sent by the first auxiliary base station through a transceiver;

transmitting the address to a target base station through a transceiver;

Optionally, the processor further implements the following steps when executing the program:

transmitting a first handover request message to a mobility management entity MME through a transceiver, the address being transmitted to the target base station by an access and mobility management function AMF based on the first handover request message;

and sending a second switching request message to the target base station through the transceiver, wherein the second switching request message carries an address for directly forwarding data of the first auxiliary base station.

and sending an auxiliary base station adding request message to the target auxiliary base station through a transceiver, wherein the auxiliary base station adding request message carries an address for directly forwarding data by the first auxiliary base station.

The embodiment of the invention also provides a data forwarding device which is applied to the first auxiliary base station and comprises a memory, a transceiver and a processor;

receiving a first request message sent by a first main base station through a transceiver, wherein the first request message is used for requesting to acquire an address of the first auxiliary base station for directly forwarding data;

transmitting the address to the first master base station through a transceiver according to the first request message;

The embodiment of the invention also provides a data forwarding device which is applied to the target base station and comprises a memory, a transceiver and a processor;

the method comprises the steps that a transceiver is used for obtaining an address of a first auxiliary base station for directly forwarding data;

adding the address to a first base station address list, wherein the first base station address list is a list of addresses of base stations to which the target base station can be connected;

The embodiment of the invention also provides a data forwarding device, which is applied to the first main base station and comprises:

the first sending unit is used for sending a first request message to a first auxiliary base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station;

the first acquisition unit is used for acquiring the address sent by the first auxiliary base station;

a second transmitting unit, configured to transmit the address to a target base station;

Optionally, the second sending unit is configured to send a first handover request message to a mobility management entity MME, and send, by an access and mobility management function AMF, the address to the target base station based on the first handover request message;

Optionally, the second sending unit is configured to send a second handover request message to the target base station, where the second handover request message carries an address where the first auxiliary base station directly performs data forwarding.

Optionally, the second sending unit is configured to send an auxiliary base station addition request message to the target auxiliary base station, where the auxiliary base station addition request message carries an address where the first auxiliary base station directly performs data forwarding.

The embodiment of the invention also provides a data forwarding device, which is applied to the first auxiliary base station and comprises the following components:

the first receiving unit is used for receiving a first request message sent by a first main base station, wherein the first request message is used for requesting to acquire an address of the first auxiliary base station for directly forwarding data;

a third sending unit, configured to send the address to the first master base station according to the first request message;

The embodiment of the invention also provides a data forwarding device which is applied to the target base station and comprises the following components:

the second acquisition unit is used for acquiring an address of the first auxiliary base station for directly forwarding data;

a first processing unit, configured to add the address to a first base station address list, where the first base station address list is a list of addresses of base stations to which the target base station can connect;

Optionally, the second obtaining unit is configured to:

Embodiments of the present invention also provide a processor-readable storage medium storing program instructions for causing the processor to perform the steps of the data forwarding method as described above.

The technical scheme of the invention has at least the following beneficial effects:

in the embodiment of the invention, the first main base station requests to acquire the address of the first auxiliary base station for directly forwarding data, and sends the address to the target base station, so that the target base station adds the address to a base station address list allowing the target base station to be connected, and the target base station is a base station connected after the terminal is switched from a double-connection state to a single-connection state or is a target auxiliary base station after the auxiliary base station is changed in the double-connection state, thus, in the scene of switching the double connections to the single-connection state or the auxiliary base station is changed, the target base station can receive the data of the first auxiliary base station for forwarding the data based on the address of the first auxiliary base station for forwarding the data, and further, the forwarding data between the first auxiliary base station and the target base station is ensured not to be discarded.

Drawings

FIG. 1 is a block diagram of a network system to which embodiments of the present invention are applicable;

FIG. 2 is a schematic flow chart of a data forwarding method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing the interaction of the data forwarding method in the embodiment of the present invention;

FIG. 4 is a second schematic diagram showing the interaction of the data forwarding method according to the embodiment of the present invention;

FIG. 5 is a third exemplary interaction diagram of the data forwarding method according to the present invention;

FIG. 6 is a second flow chart of a data forwarding method according to the embodiment of the present invention;

FIG. 7 is a third flow chart of a data forwarding method according to the embodiment of the present invention;

FIG. 8 is a block diagram showing a data forwarding apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a data forwarding device according to an embodiment of the present invention;

FIG. 10 shows a second block diagram of a data forwarding device according to an embodiment of the present invention;

FIG. 11 is a third block diagram of a data forwarding device according to an embodiment of the present invention.

Detailed Description

The technical scheme provided by the embodiment of the invention can be suitable for various systems, in particular to a 5G system. For example, applicable systems may be global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), time division synchronous CDMA (Time Division Synchronous Code Division Multiple Access, TD-SCDMA), general packet Radio service (general packet Radio service, GPRS), long term evolution (Long Term Evolution, LTE) including TD-LTE and FDD LTE, long term evolution-advanced (Long Term Evolution Advanced, LTE-a), universal mobile system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability For Microwave Access, wiMAX), new air interface (New Radio, NR) systems, and the like. Terminal devices and network devices are included in these various systems. Core network parts may also be included in the system, such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS/5 GC), etc.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be called a terminal Device or a User Equipment (UE), and the terminal 11 may be a terminal-side Device such as a mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a notebook (Personal Digital Assistant, PDA), a palm Computer, a netbook, an Ultra-mobile personal Computer (Ultra-Mobile Personal Computer, UMPC), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and the Wearable Device includes: a bracelet, earphone, glasses, etc. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network device 12 may be a base station or a core network, wherein the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a specific technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, and it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

As shown in fig. 2, an embodiment of the present invention provides a method for forwarding data, including:

step 201: the method comprises the steps that a first main base station sends a first request message to a first auxiliary base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station.

In this step, the first request message may be a secondary base station change request message (SgNB Modification request). The first request message carries an identification ID of the target base station. The first request message is used for requesting the first auxiliary base station to provide information whether direct data forwarding with the target base station can be performed or not and an address for directly performing data forwarding.

Step 202: the first main base station obtains the address sent by the first auxiliary base station.

Specifically, the first master base station obtains the address through an auxiliary base station change response message (SgNB Modification response) sent by the first auxiliary base station. The auxiliary base station change response message carries information whether the first auxiliary base station can directly forward data with the target base station, and if the first auxiliary base station can directly forward data with the target base station, the message also carries an address for directly forwarding data.

Step 203: and the first main base station sends the address to a target base station.

In the embodiment of the present invention, the dual connection state refers to that the terminal is in communication connection with two base stations (a first main base station and a first auxiliary base station), and the single connection state refers to that the terminal is in communication connection with one base station (e.g., a target base station).

As a first alternative implementation, the first master base station sends the address to a target base station, including:

In this first alternative implementation, the operating state of the terminal is switched from dual connectivity to single connectivity and an inter-RAT handover is performed.

In the implementation manner, the first main base station determines whether to carry an instruction of directly forwarding data in the first switching request message according to feedback of the first auxiliary base station and whether to directly forward data between the first main base station and the target base station, and if the first switching request message carries the instruction of directly forwarding data and the SN feedback support and the target base station directly forward data, the MN carries an address of directly forwarding data by the first auxiliary base station in the first switching request message.

In the implementation manner, after a first main base station sends a first switching request message to an MME, after an EPS bearing context at the MME side is converted into a PDU session context suitable for a 5GS system through a series of handshakes of network elements of EPS and 5GC in a CN, an AMF sends the first switching request message to a target base station.

As a second alternative implementation manner, the first master base station sends the address to a target base station, including:

In the second implementation manner, the working state of the terminal is switched from dual connection to single connection, and the switching in the same RAT is executed. In the implementation manner, the first main base station sends the address for directly forwarding the data of the first auxiliary base station to the target base station through the second switching request message.

As a third alternative implementation manner, the first master base station sends the address to a target base station, including:

In the implementation mode, the method is a scene of changing the auxiliary base station in the double-connection state, and in the implementation mode, the first main base station sends the address of directly forwarding data of the first auxiliary base station to the target auxiliary base station through an auxiliary base station adding request message (SN addition request).

The data forwarding method of the present invention will be described with reference to specific examples.

Example 1: the UE works in an EN-DC scene, and a source master base station (MeNB) initiates inter-rate switching to the NG-RAN node according to the measurement result. The EN-DC scene refers to that a main base station (MN) is an eNB, a secondary base Station (SN) is a gNB, and the eNB is connected with an EPC.

As shown in fig. 3, the data forwarding method includes:

step 301: the source master base station (MeNB) sends a secondary base station change request message to the secondary base station (SgNB).

In this step, the source base station decides to switch the UE to the 5G base station based on information such as measurement. The source main base station sends SgNB Modification request information to the auxiliary base station, wherein the information carries the ID of the target 5G node, and requests the auxiliary base station to provide information whether direct data forwarding with the target base station and information of an address for direct data forwarding can be carried out.

Step 302: the secondary base station sends a secondary base station change response message.

The auxiliary base station carries information of whether the auxiliary base station and the target 5G node can perform direct data forwarding or not in SgNB Modification response information, and if the auxiliary base station supports direct data forwarding, the auxiliary base station carries an address for performing direct data forwarding in the information.

Step 303: the source master base station sends a handover request message to the MME.

The source main base station decides whether to carry an instruction of directly forwarding data (direct data forwarding available) in the switching request message according to the feedback of the auxiliary base station and whether to directly forward data between the source main base station and the target base station, if the switching request message carries the instruction of directly forwarding data, and the SN feedback supports the direct data forwarding between the source main base station and the target base station, the source main base station carries an address of directly forwarding data by the auxiliary base station in the switching request message.

Step 304: and (3) converting the EPS bearing context at the MME side into a PDU session context applicable to a 5GS system through a series of handshakes of the EPS and the 5GC network elements in the CN.

The specific implementation of this step is prior art and will not be described in detail here.

Step 305: the AMF sends a handover request message to the target base station.

If the handover request message in step 303 carries an indication of direct data forwarding available, the handover request message in this step carries the address of the direct data forwarding received in step 303 to the target base station. The target base station adds the address of the forward transfer of the received data to the list of addresses of base stations allowed to connect to allow accepting the forward transferred data sent by the source.

After performing the above step 305, the target address allocated by the CN for data forwarding is told to the MME through a series of handshakes of the EPS and 5GC network elements. MME sends the address of data forwarding to the source main base station through a handover command; the source main base station initiates an SgNB release process to the source auxiliary base station, and the MN provides a data forwarding address distributed by the MN for the SN Terminated E-RAB in the process. This subsequent process is identical to the implementation process in the prior art and will not be described in detail here.

Example 2: switch from the dual connectivity state to the single connectivity state and perform a handover within the same RAT.

As shown in fig. 4, the process includes:

step 401: the source main base station (S-MN) sends a secondary base station change request message to the source secondary base station (S-SN).

The source main base station sends SgNB Modification request information to the auxiliary base station, wherein the information carries the ID of the target base station, and requests the auxiliary base station to provide information whether direct data forwarding with the target base station and information of an address for direct data forwarding can be carried out.

Step 402: the source auxiliary base station sends an auxiliary base station change response message.

The auxiliary base station carries information of whether the auxiliary base station and the target base station can perform direct data forwarding or not in SgNB Modification response information, and if the auxiliary base station supports direct data forwarding, the auxiliary base station carries an address for performing direct data forwarding in the information.

Step 403: the source master base station initiates a handover procedure by sending a handover request message to the target base station.

If the SN feedback supports direct data forwarding between itself and the target base station, the MN carries the address of the SN for data forwarding in the handover request message. The target base station adds the address of the forward transfer of the received data to the list of addresses of base stations allowed to connect to allow accepting the forward transferred data sent by the source.

Step 404: the target base station sends a handover request confirm message to the source master base station.

In the handover request confirm message (handover request ACK), the target base station provides an address of data forwarding (data forwarding).

After the step 404 is performed, the source MN initiates an SN release procedure to the source SN, and in addition, the MN provides the MN with the data forwarding address allocated by the MN for the PDU session of the SN Terminated; the source MN sends a reconfiguration message to the UE; the UE and the target gNB/ng-eNB are synchronized; for the SN-terminated E-RAB, the SN gives SN STATUS TRANSFER to the MN; starting data forwarding; the base station reports secondary data report to the core network; the target base station initiates a path switch process (wherein forward data and end marker are directly sent to the target base station by a source SN); the target base station initiates UE Context Release a procedure to the source base station, and the source side deletes the UE context.

Example 3: the secondary base station in the dual connectivity state changes.

As shown in fig. 5, the process includes:

step 501: the master base station transmits a secondary base station change request message to a source secondary base station (S-SN).

The source main base station sends SgNB Modification request information to the auxiliary base station, wherein the information carries the ID of the target auxiliary base station, and requests the auxiliary base station to provide information whether direct data forwarding can be carried out with the target auxiliary base station and information of an address for carrying out the direct data forwarding.

Step 502: the source auxiliary base station sends an auxiliary base station change response message.

The source auxiliary base station carries information of whether the source auxiliary base station and the target auxiliary base station can perform direct data forwarding in SgNB Modification response information, and if the source auxiliary base station supports direct data forwarding, the source auxiliary base station carries an address for performing direct data forwarding in the information.

Step 503: the primary base station transmits a secondary base station addition request message to a target secondary base station (T-SN).

If the source and the auxiliary base station support direct data forwarding between the source and the target auxiliary base stations, the main base station carries the address of the direct data forwarding of the source and the auxiliary base stations in an auxiliary base station adding request message (SN addition request).

Step 504: and the target auxiliary base station sends an auxiliary base station adding request confirmation message.

The target secondary base station adds the address of the forward transfer of the received data to the list of addresses of the base stations allowed to connect to allow the forward transfer data sent by the source secondary base station to be received and responds with a SN Addition Request Acknowledge message.

After performing step 504, the MN releases the source SN; the MN sends RRC connection reconfiguration to trigger the UE and the target SN to establish connection, and the UE responds; the MN informs the target SN that RRC connection reconfiguration is successful; the UE initiates a random access process to the target SN; for bearers using RLC AM mode, the source ng-eNB/gNB sends SN Status Transfer to the target MN, which further forwards to the target SN; performing data forwarding; source SN sends Secondary RAT data usage report; the MN initiates PDU Session Modify a procedure (where both forwarding data and end marker are directly sent from the source SN to the target SN); the MN initiates UE Context Release procedures towards the source SN.

As shown in fig. 6, the embodiment of the present invention further provides a data forwarding method, which includes:

step 601: the method comprises the steps that a first auxiliary base station receives a first request message sent by a first main base station, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station.

Step 602: and the first auxiliary base station sends the address to the first main base station according to the first request message.

In the embodiment of the invention, the first auxiliary base station sends the address for directly forwarding the data to the first main base station, and the first main base station sends the address to the target base station, so that the target base station adds the address to a base station address list allowing the target base station to be connected, and the target base station is a target auxiliary base station of which the terminal is connected after being switched from a double-connection state to a single-connection state or the target base station is subjected to auxiliary base station change under the double-connection state, so that in the scene of switching from the double-connection state to the single-connection state or the auxiliary base station change, the target base station can receive the data forwarded by the first auxiliary base station based on the address for forwarding the data by the first auxiliary base station, thereby ensuring that the forwarding data between the first auxiliary base station and the target base station are not discarded.

As shown in fig. 7, the embodiment of the present invention further provides a data forwarding method, which includes:

step 701: the target base station obtains the address of the first auxiliary base station for directly forwarding the data.

Step 702: the target base station adds the address to a first base station address list, wherein the first base station address list is a list of addresses of base stations to which the target base station can be connected.

In the embodiment of the invention, the target base station adds the address of the first auxiliary base station for directly forwarding data to the base station address list allowing the target base station to be connected, and the target base station is the base station connected after the terminal is switched from the double-connection state to the single-connection state or the target base station is the target auxiliary base station after the auxiliary base station is changed in the double-connection state, so that in the scene of switching the double-connection state to the single-connection state or the auxiliary base station is changed, the target base station can receive the data forwarded by the first auxiliary base station based on the address of the first auxiliary base station for forwarding the data, thereby ensuring that the forwarding data between the first auxiliary base station and the target base station is not discarded.

It should be noted that, the related actions of the target base station and the first secondary base station are described in detail in the method embodiment of the first primary base station, which is not described herein.

As shown in fig. 8, the embodiment of the present invention further provides a data forwarding apparatus, which is applied to the first main base station, and includes a memory 820, a transceiver 800, and a processor 810;

A memory 820 for storing a computer program; a transceiver 800 for transceiving data under the control of the processor;

in a first embodiment of the invention, the processor 810 is configured to read the computer program in the memory 820 and perform the following operations:

transmitting a first request message to a first auxiliary base station through a transceiver 800, where the first request message is used to request to obtain an address where the first auxiliary base station directly performs data forwarding;

transmitting the address to a target base station through a transceiver;

Optionally, the processor 810 also implements the following steps when executing the program:

In a second embodiment of the invention, the processor 810 is configured to read the computer program in the memory 820 and perform the following operations:

In a third embodiment of the present invention, the processor 810 is configured to read the computer program in the memory 820 and perform the following operations:

Wherein in fig. 8, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 810 and various circuits of memory represented by memory 820, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 800 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The processor 810 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 810 in performing operations.

The processor 810 may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), or it may employ a multi-core architecture.

It should be noted that, the device provided in the embodiment of the present invention can implement all the method steps implemented in the embodiment of the data forwarding method, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the embodiment of the present invention are omitted.

As shown in fig. 9, the embodiment of the present invention further provides a data forwarding device, which is applied to a first main base station, and includes:

a first sending unit 901, configured to send a first request message to a first auxiliary base station, where the first request message is used to request to obtain an address where the first auxiliary base station directly performs data forwarding;

a first obtaining unit 902, configured to obtain the address sent by the first secondary base station;

a second transmitting unit 903, configured to transmit the address to a target base station;

As shown in fig. 10, the embodiment of the present invention further provides a data forwarding device, which is applied to a first auxiliary base station, and includes:

a first receiving unit 1001, configured to receive a first request message sent by a first primary base station, where the first request message is used to request to obtain an address where the first secondary base station directly performs data forwarding;

a third sending unit 1002, configured to send the address to the first master base station according to the first request message;

As shown in fig. 11, the embodiment of the present invention further provides a data forwarding device, which is applied to a target base station, and includes:

a second obtaining unit 1101, configured to obtain an address where the first secondary base station directly performs data forwarding;

a first processing unit 1102, configured to add the address to a first base station address list, where the first base station address list is a list of addresses of base stations to which the target base station can connect;

Optionally, the second obtaining unit is configured to:

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all or part of the technical solution contributing to the prior art, or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a Processor (Processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In some embodiments of the present invention, there is also provided a processor-readable storage medium storing program instructions for causing the processor to perform the steps of:

a first request message is sent to a first auxiliary base station through a transceiver, wherein the first request message is used for requesting to acquire an address for directly forwarding data of the first auxiliary base station; acquiring the address sent by the first auxiliary base station through a transceiver; transmitting the address to a target base station through a transceiver; the first main base station is a source main base station connected with a terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a base station connected with the terminal after the terminal is switched from the double-connection state to the single-connection state; or the first main base station is a main base station connected with the terminal in a double-connection state, the first auxiliary base station is a source auxiliary base station connected with the terminal in the double-connection state, and the target base station is a target auxiliary base station connected with the terminal after the auxiliary base station is changed in the double-connection state.

Alternatively, the program instructions are for causing the processor to perform the steps of:

receiving a first request message sent by a first main base station through a transceiver, wherein the first request message is used for requesting to acquire an address of the first auxiliary base station for directly forwarding data; transmitting the address to the first master base station through a transceiver according to the first request message; the first main base station is a main base station connected with the terminal in a double-connection state, and the first auxiliary base station is an auxiliary base station connected with the terminal in the double-connection state.

the method comprises the steps that a transceiver is used for obtaining an address of a first auxiliary base station for directly forwarding data; adding the address to a first base station address list, wherein the first base station address list is a list of addresses of base stations to which the target base station can be connected; the target base station is a base station connected after the terminal is switched from a double-connection state to a single-connection state; or the target base station is a target auxiliary base station connected after the auxiliary base station is changed in the double-connection state by the terminal.

All the implementation manners in the data forwarding method embodiments described above can be implemented when the program instructions are executed by the processor, and in order to avoid repetition, a description is omitted here.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless Terminal Device may also be referred to as a system, subscriber Unit (Subscriber Unit), subscriber Station (Subscriber Station), mobile Station (Mobile Station), remote Station (Remote Station), access Point (Access Point), remote Terminal Device (Remote Terminal), access Terminal Device (Access Terminal), user Terminal Device (User Terminal), user Agent (User Agent), user equipment (User Device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (Evolutional Node B, eNB or e-NodeB) in a long term evolution (Long Term Evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (Next Generation System), a home evolved base station (Home evolved Node B, heNB), a Relay Node (Relay Node), a home base station (Femto), a Pico base station (Pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method of forwarding data, comprising:

the first main base station sends the address to a target base station;

2. The method of claim 1, wherein the first master base station transmitting the address to a target base station comprises:

3. The method of claim 1, wherein the first master base station transmitting the address to a target base station comprises:

4. The method of claim 1, wherein the first master base station transmitting the address to a target base station comprises:

5. A method of forwarding data, comprising:

6. The method of claim 5, wherein the first request message is a secondary base station change request message, the first request message carrying an identification of a target base station;

7. A method of forwarding data, comprising:

8. The method of claim 7, wherein the target base station obtaining the address of the first secondary base station for direct data forwarding comprises:

9. The data forwarding device is applied to a first main base station and is characterized by comprising a memory, a transceiver and a processor;

transmitting the address to a target base station through a transceiver;

10. The apparatus of claim 9, wherein the processor when executing the program further performs the steps of:

11. The apparatus of claim 9, wherein the processor when executing the program further performs the steps of:

12. The apparatus of claim 9, wherein the processor when executing the program further performs the steps of:

13. The data forwarding device is applied to a first auxiliary base station and is characterized by comprising a memory, a transceiver and a processor;

14. The apparatus of claim 13, wherein the first request message is a secondary base station change request message, the first request message carrying an identification of a target base station;

15. The data forwarding device is applied to a target base station and is characterized by comprising a memory, a transceiver and a processor;

16. The apparatus of claim 15, wherein the processor when executing the program further performs the steps of:

17. A data forwarding device applied to a first main base station, comprising:

18. The apparatus according to claim 17, wherein the second sending unit is configured to send a first handover request message to a mobility management entity MME, the address being sent to the target base station by an access and mobility management function AMF based on the first handover request message;

19. The apparatus of claim 17, wherein the second sending unit is configured to send a second handover request message to a target base station, the second handover request message carrying an address where the first secondary base station directly performs data forwarding.

20. The apparatus of claim 17, wherein the second sending unit is configured to send an auxiliary base station addition request message to the target auxiliary base station, the auxiliary base station addition request message carrying an address where the first auxiliary base station directly performs data forwarding.

21. A data forwarding device applied to a first auxiliary base station, comprising:

22. The apparatus of claim 21, wherein the first request message is a secondary base station change request message, the first request message carrying an identification of a target base station;

23. A data forwarding device applied to a target base station, comprising:

24. The apparatus of claim 23, wherein the second acquisition unit is configured to:

25. A processor-readable storage medium, characterized in that the processor-readable storage medium stores program instructions for causing the processor to perform the steps of the data forwarding method according to any one of claims 1 to 4, or to perform the steps of the data forwarding method according to any one of claims 5 to 6, or to perform the steps of the data forwarding method according to any one of claims 7 to 8.