WO2018127220A1

WO2018127220A1 - Data forwarding method and device

Info

Publication number: WO2018127220A1
Application number: PCT/CN2018/075307
Authority: WO
Inventors: 张大钧; 鲍炜; 刘佳敏
Original assignee: 电信科学技术研究院
Priority date: 2017-01-06
Filing date: 2018-02-05
Publication date: 2018-07-12
Also published as: CN108282829A

Abstract

The present application discloses a data forwarding method and device for solving the problem in the prior art of long interruption and time delay during user data transmission caused by a change of network entity to which a multi-access user equipment is anchored. The method comprises: a source primary network entity of a source network of a mobile communication network forwards, on the basis of address information of a second buffer area of a target primary network entity of a target network, a PDCP service data unit in a first buffer area of the source primary network entity to the second buffer area of a target primary network entity of the target network for storing same; when the target network is configured to be in an effective state, and it is necessary to transmit or re-transmit a PDCP service data unit to a multi-access user equipment, the target primary network entity obtains from the second buffer area the PDCP service data unit and transmits same to the multi-access user equipment. By means of downlink and uplink data forwarding operation, the present invention achieves minimum data interruption of user data transmission at mobile communication air interfaces, ensures seamless user data transfer, and further improves the mobility of the communication network.

Description

Data forwarding method and device

The present application claims priority to Chinese Patent Application, filed on Jan. 6, 2017, filed Jan. .

Technical field

The embodiments of the present invention relate to the field of digital information transmission technologies, and in particular, to a data forwarding method and apparatus.

Background technique

A multi-connected user equipment is a user equipment that can connect two or more network entities at the same time. In a mobile communication network, for example, 2G, 2.5G, 3G, 4G, 5G or a later developed higher generation mobile communication network, when a multi-connected user equipment moves to the overlapping of signal coverage of two network entities, it will trigger Mobility access switching event. The existing multi-connection user equipment access switching method usually uses the user data transmission on the source network side to be interrupted first, and after the multi-connection user equipment accesses the target network entity, the user data transmission continues, and the user data transmission exists. Interrupt technical problems for a long time.

In order to avoid the interruption of the user data transmission, there is a multi-connection user equipment access handover method similar to the traditional DC operation in the prior art. The method may specifically be: using the target network entity as the SeNB, that is, the control plane in the handover process. The connected evolved base station is added to the source network side communication, and the data bearer mode between the user equipment and the network entity adopts a split data bearer mode, that is, a Split DRB mode. Since the method does not involve core network signaling, the signaling anchor point does not change and belongs to the mobility access handover event on the RAN side. Therefore, when the access handover occurs, the user data transmission is not interrupted.

There is also a multi-connection user equipment access handover method based on a specified anchor point in the prior art, in which the network entity accessible by the multi-connection user equipment includes at least one independent medium access control (MAC) entity, the medium The access control (MAC) entity is a physical network entity having a medium access control (MAC) address; the method configures one of two or more network entities accessible by the multi-connection user equipment as a primary network entity, and other network entities Configured as a slave network entity, where the primary network entity is the network entity in which the Packet Data Convergence Protocol (PDCP) functional entity of the signalling bearer and/or data bearer is located, which is also the termination of the core network signalling connection and/or data connection Point, the Packet Data Convergence Protocol (PDCP) functional entity of the signaling bearer and/or data bearer refers to a logical entity including functions of security, compression, and sorting; the slave network entity is mainly used for participating in data transmission, A network having at least a functional entity such as a radio link layer control protocol layer, a medium access control (MAC) layer, and a physical layer for each data bearer Entities, having at least a similar wireless link layer control protocol layer, a media access control (MAC) layer and physical layer functions such as entity comprising segments connected in series, multiplexing, logical entities scheduling, encoding, modulation functions. Since the method uses the primary network entity as the user data of the user equipment to enter and exit the anchor of the mobile network, regardless of which network entity the user equipment accesses to switch to, the user address allocated by the primary network entity to the user equipment remains unchanged, therefore, When the anchor point is not changed, the user data transmission is not interrupted when the access is switched.

However, in the process of implementing the technical solution of the embodiment of the present application, at least the existing multi-connection user equipment access switching method is found to have the following technical problems:

For a multi-connected user equipment, it is difficult for the anchored network entity to remain unchanged. When the anchor point is changed, a slave network entity is designated from the network entity as the primary network entity of the next period from the current time period, and the remaining The slave network entity and the primary network entity of the current time period are used as the slave network entities of the next period, and corresponding operations are performed, and the user data transmission is still interrupted when the anchor point is changed. During the anchor change process, only the downlink and uplink preamble data on the source network side can be transmitted on the target network side. Therefore, the interruption of the user data in the mobile communication air interface is still long.

Summary of the invention

The embodiment of the present invention provides a data forwarding method and device, which are used to solve the defect that a network entity anchored by a multi-connection user equipment changes in the prior art, causing a long interruption and a delay in user data transmission, and realizing user data transmission. The interruption and delay at the air interface of the mobile communication meet the requirements, thereby improving the mobility of the mobile communication system.

The specific technical solutions provided by the embodiments of the present application are as follows:

In a first aspect, the embodiment of the present application provides a data forwarding method, including:

The source primary network entity on the source network side in the mobile communication network is based on the second cache area address information of the target primary network entity on the target network side, based on the second cache area address information of the target primary network entity on the target network side, The PDCP service data unit in the first buffer area of the source primary network entity is forwarded to the second cache area of the target primary network entity on the target network side;

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity obtains the location from the second buffer area. Decoding the PDCP service data unit and transmitting the data to the multi-connection user equipment;

The source primary network entity is a source anchor point of the multi-connection user equipment, and the source from the network entity is a source data transmission point of the multi-connection user equipment, where the target primary network entity is a target anchor point of the multi-connection user equipment when the target network side is in a target network side configuration effective state; the target primary network entity is configured by the source primary network entity based on a radio resource management policy of the multi-connection user equipment At least one source on the source network side is selected from the network entity.

In a possible implementation manner, the method further includes:

Sending, by the source primary network entity, a second buffer cache request to the target primary network entity to request address information of the second cache area of the target primary network entity; the target primary network entity responding to the a second buffer area cache request, returning second buffer area address information to the source primary network entity;

The second buffer area is buffered by the PDCP service data unit and the target network side from the source data entity of the source primary network entity and the corresponding sequence number and/or unassigned sequence number. The IP packet from the core network gateway after the target network side is configured to take effect.

In a possible implementation manner, when the target network side is in a target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity is Obtaining the PDCP service data unit in the second buffer area and sending the data to the multi-connection user equipment, specifically:

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be retransmitted to the multi-connection user equipment, the target primary network entity is obtained based on obtaining from the multi-connection user equipment. The uplink PDCP status report and/or the status of the radio link layer control protocol acknowledgement status based on the target network side, the PDCP service data unit is obtained from the second buffer area and sent to the multi-connection user equipment.

In a possible implementation manner, the method further includes:

Transmitting, by the target primary network entity, a final uplink protocol data unit termination identifier to the source primary network entity when the target network side is in a wireless configuration active state; receiving the received by the target primary network entity Before the last uplink protocol data unit terminates the identifier, the source primary network entity sorts the out-of-order uplink PDCP service data units, and then sequentially sends the sorted out-of-order uplink PDCP service data units to the core network; After receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity sends the sorted out-of-order uplink PDCP service data unit along with the corresponding sequence number. To the target primary network entity on the target network side.

In a possible implementation manner, the method further includes:

After receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity forwards the uplink PDCP service data unit from the network entity as a target of the target network side. Give the target primary network entity.

In a possible implementation, before the target network side is in the target network side configuration effective state, the method further includes:

The multi-connection user equipment configures the multi-connection user equipment to perform uplink one-way transmission of data bearers between the terminal and the base station based on radio resource control or medium access control signaling, in the network from the original uplink protocol data unit. When the downlink acknowledgement message of the entity is continuously received by the multi-connected user equipment, the one-way uplink transmission is performed by a preset network entity for all uplink protocol data units.

In a possible implementation, after the multi-connection user equipment has performed one-way uplink transmission, the method further includes:

The target primary network entity constructs the uplink PDCP status report based on a sequence number status of an uplink PDCP protocol data unit counted by the target network.

In a possible implementation manner, the method further includes:

The target primary network entity constructs an uplink PDCP status report based on the status of the protocol data unit in the second buffer area.

In a possible implementation manner, the method further includes:

The target network side is in the target network side configuration effective state, the target primary network entity triggers the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, the security configuration on the target network side is enabled;

The multi-connection user equipment enables the PDCP sequence number of the security context of the target network side based on the received display signaling sent by the target network side;

The multi-connection user equipment processes a PDCP data packet before a preset PDCP sequence number based on a security context of the source network side;

The multi-connection user equipment processes the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.

In a second aspect, the embodiment of the present application provides a data forwarding device, including:

a dual cache implementation module, configured to: based on the second cache area address information of the target primary network entity on the target network side, based on the second cache area address information of the target primary network entity on the target network side, the source primary network entity on the source network side The PDCP service data unit in the first buffer area is forwarded to the second buffer area of the target primary network entity on the target network side for buffering;

a service data retransmission module, configured to: when the target network side is in a target network side configuration effective state, and needs to newly send or resend the PDCP service data unit to the multi-connection user equipment, from the second buffer area Obtaining the PDCP service data unit and transmitting the PDCP service data unit to the multi-connection user equipment.

In a possible implementation, the device further includes:

a second buffer area address information obtaining module, configured to send a second buffer area cache request to the target primary network entity to request address information of the second buffer area of the target primary network entity; a second buffer area cache request, returning second buffer area address information to the source primary network entity;

In a possible implementation manner, the service data retransmission module is specifically configured to:

When the target network side is in the target network side configuration effective state, and needs to retransmit the PDCP service data unit to the multi-connection user equipment, based on the uplink PDCP status report obtained from the multi-connection user equipment and And/or obtaining the PDCP service data unit from the second buffer area and transmitting to the multi-connection user equipment based on a radio link layer control protocol acknowledgement status of the target network side.

In a possible implementation, the apparatus further includes an uplink protocol data unit termination identifier application module;

The uplink protocol data unit termination identifier application module is configured to: when the target network side is in a wireless configuration active state, transmit a last uplink protocol data unit termination identifier to the source primary network entity; and, for receiving Before the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the out-of-order uplink PDCP service data units are sorted, and then the sorted out-of-order uplink PDCP service data units are sequentially sent. And to the core network; and, after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the sorted out-of-order uplink PDCP service data unit is associated with the corresponding The serial number is sent to the target primary network entity on the target network side.

In a possible implementation, the uplink protocol data unit termination identifier application module is further configured to: after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the uplink PDCP service The data unit is forwarded to the target primary network entity.

In a possible implementation, the apparatus further includes a one-way uplink transmission module;

The unidirectional uplink transmission module is configured to configure the multi-connection user equipment to perform the terminal and the base station based on the radio resource control or the medium access control signaling before the target network side is in the target network side configuration effective state. Uplink one-way transmission of data between the two, so that in the case that the downlink acknowledgement message from the network entity that originally received the uplink protocol data unit can be continuously received by the multi-connected user equipment, a preset is adopted for all uplink protocol data units. The network entity performs the one-way uplink transmission.

In a possible implementation, the apparatus further includes an uplink PDCP status report building module;

The uplink PDCP status report construction module is configured to construct an uplink PDCP status report based on a protocol data unit status in the second buffer area; and, after the multi-connection user equipment has performed one-way uplink transmission, The uplink PDCP status report is constructed based on a sequence number status of an uplink PDCP protocol data unit counted by the target network.

In a possible implementation manner, the apparatus further includes a target network side full configuration enabling module;

The target network side full configuration enabling module is configured to be in the target network side configuration effective state on the target network side, triggering the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, enabling the target network side Security configuration

And for enabling the PDCP sequence number of the security context of the target network side based on the received display signaling sent by the target network side;

And, for processing a PDCP data packet before a preset PDCP sequence number based on a security context of the source network side;

And for processing the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.

The second data forwarding device provided by the embodiment of the present application includes:

a memory for storing program instructions;

a processor, configured to invoke a program instruction stored in the memory, and execute according to the obtained program:

Forwarding the PDCP service data unit in the first buffer area of the source primary network entity on the source network side to the second target network entity on the target network side based on the second buffer area address information of the target primary network entity on the target network side Caching in the buffer area, so that when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity can The PDCP service data unit is obtained in the second buffer area and sent to the multi-connection user equipment.

A third data forwarding device provided by the embodiment of the present application includes:

a memory for storing program instructions;

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the PDCP service data unit is obtained from the second buffer area of the target primary network entity. And sending to the multi-connection user equipment, where the PDCP service data unit is a source network entity on the source network side, based on the second cache area address information of the target primary network entity on the target network side, the source is the source The PDCP service data unit in the first buffer area of the primary network entity is forwarded to the second buffer area of the target primary network entity of the target network side.

The computer storage medium provided by the embodiment of the present application stores computer executable instructions for causing the computer to execute: based on the second cache area address information of the target primary network entity on the target network side, Forwarding the PDCP service data unit in the first buffer area of the source primary network entity on the source network side to the second buffer area of the target primary network entity on the target network side, so that the target network side is in the target network side configuration When the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity can obtain the PDCP service data unit from the second buffer area and send the Connect multiple user devices.

The second computer storage medium provided by the embodiment of the present application stores computer executable instructions for causing the computer to execute: the target network side is in the target network side configuration effective state, and needs to be more And when the user equipment newly transmits or retransmits the PDCP service data unit, obtaining the PDCP service data unit from the second buffer area of the target primary network entity and sending the PDCP service data unit to the multi-connection user equipment; wherein the PDCP service a data unit, where the source primary network entity on the source network side forwards the PDCP service data unit in the first buffer area of the source primary network entity to the second cache area address information of the target primary network entity on the target network side The target network side is cached in the second cache area of the target primary network entity.

Based on the foregoing technical solution, in the embodiment of the present application, when the multi-connection user equipment triggers the mobility access handover of the mobile communication network, the downlink or uplink data is forwarded to the second buffer area of the target primary network entity for buffering, and the user data is implemented. The double buffering, when the user data needs to be retransmitted to the multi-connection user equipment, is directly obtained based on the second buffer area of the target main network entity, thereby realizing the minimum data interruption of the user data transmission at the mobile communication air interface, ensuring seamless user data. Transfer to further improve the mobile performance of the communication network. The technical problem that the network entity anchored by the multi-connection user equipment in the prior art changes and the user data transmission has a long interruption and delay is solved.

DRAWINGS

1 is a schematic diagram of a process of data forwarding in an embodiment of the present application;

2 is a schematic diagram of a process of performing data forwarding for downlink data in an embodiment of the present application;

FIG. 3 is a schematic diagram of a process for performing data forwarding on uplink data according to an embodiment of the present application;

4 is a schematic diagram of a process for configuring one-way DRB data transmission in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a data forwarding apparatus according to an embodiment of the present application;

6 is a schematic structural diagram of a mobile communication network according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a second data forwarding device according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a third data forwarding device according to an embodiment of the present application.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

In order to facilitate a clear and complete understanding of the technical solutions of the embodiments of the present application, the terms involved in the embodiments of the present application are described below.

The term "PDCP" (Packet Data Convergence Protocol), which is responsible for compressing and decompressing IP headers, transmitting service data, and maintaining the serial number of the radio bearer, is a radio transmission protocol in the Universal Mobile Telecommunications System (UMTS). A stack for handling Radio Resource Management (RRC) messages on the control plane and Internet Protocol (IP) packets on the user plane. The packet data convergence protocol sublayer belongs to the second layer of the radio interface protocol stack. After obtaining the IP data packet from the upper layer on the user plane, the IP data packet is header compressed and encrypted, and then submitted to the radio link layer control protocol. (RLC) sub-layer, at the same time, also provides sequential submission and repeated packet detection functions to the upper layer; in the control plane, packet data convergence protocol sub-layer, provides signaling transmission service for upper layer radio resource control (RRC), and implements radio resources Encryption and consistency protection of control (RRC) signaling, and decryption and consistency checking of radio resource control (RRC) signaling in the reverse direction

The term "Radio Resource Control" (RRC) is the third layer of information used by the user equipment and the evolved base station for the control plane. The first layer is the physical layer, and the second layer is the medium access control layer. The radio resource control layer is the third layer. The RRC message carries all the parameters required to establish, modify, and release the medium access control layer and the physical layer protocol entity, and also carries some signaling of the non-access stratum (NAS), such as MM, CM. , SM, etc. The radio resource control allocates radio resources and transmits related signaling, and the main part of control signaling between the user equipment and the terrestrial radio access network is a radio resource control message.

The term "DRB" (Data Resource Bearer) is used to transmit data. Each user equipment can have multiple DRBs to transmit different service data.

The term "Protocol Data Unit" (PDU) refers to an information unit or a data unit that is transferred between peer entities at different sites. The protocol data unit of the Nth layer is usually recorded as an NPDU.

The term "Service Data Unit" (SDU), also called a service data unit, is a data unit that is passed between a user of a specified layer and an N-layer protocol. After the upper service data unit is sent to the lower layer, the lower layer will The encapsulation is sent out in the protocol data unit, and the Nth layer service data unit SDU has a one-to-one correspondence with the protocol data units (PDUs) of the upper layer.

In the embodiment of the present application, as shown in FIG. 1 , the specific process of data forwarding is as follows:

S010, the source primary network entity on the source network side in the mobile communication network is based on the second cache area address information of the target primary network entity on the target network side, based on the second cache area address information of the target primary network entity on the target network side. Forwarding the PDCP service data unit in the first buffer area of the source primary network entity to the second buffer area of the target primary network entity on the target network side;

In the embodiment of the present application, the second buffer area address information may be obtained by, but not limited to, the following manners:

First, the address information corresponding to the second buffer area of the target primary network entity stored in the source primary network entity;

Second, the source primary network entity sends a second cache buffer request to the target primary network entity to request address information of the second cache area of the target primary network entity; the target primary network entity Responding to the second cache area cache request, returning second cache area address information to the source primary network entity; wherein the second cache area is buffered from the source data entity of the source primary network entity And the PDCP service data unit corresponding to the serial number and/or the unassigned serial number and the IP data packet from the core network gateway after the target network side is in the target network side configuration effective state.

S020, when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity is from the second buffer area. Obtaining the PDCP service data unit and transmitting the PDCP service data unit to the multi-connection user equipment;

In the embodiment of the present application, when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity is Obtaining the PDCP service data unit in the second buffer area and sending the data to the multi-connection user equipment, which may be, but is not limited to:

In the embodiment of the present application, specifically,

The multi-connected user equipment is a user terminal device capable of simultaneously connecting two or more network entities in a mobile communication network, which may be a function mobile phone, a smart phone, a tablet computer, a notebook computer or other wireless communication terminal device. .

The mobile communication network is a 2G, 2.5G, 3G, 4G, 5G or a later generation of a higher generation mobile communication network.

The anchor point is a network entity anchored to the user equipment in the core network, and the address assigned to the user equipment by the anchor point may remain unchanged. When the user equipment uses the mobile network, the user data of the user equipment enters and exits the core network via the anchor point. The anchor point may specifically be, but not limited to, an evolved base station, a mobility management entity, and a service gateway.

In the embodiment of the present application, when the target network side is in a wireless configuration active state, the target primary network entity transmits a last uplink protocol data unit termination identifier to the source primary network entity; and receives the target primary network. Before the last uplink protocol data unit termination identifier transmitted by the entity, the source primary network entity sorts the out-of-order uplink PDCP service data units, and then sequentially sorts the sorted out-of-order uplink PDCP service data units Transmitting to the core network; after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity sends the sorted out-of-order uplink PDCP service data unit together The corresponding serial number is sent to the target primary network entity on the target network side.

In the embodiment of the present application, after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity serves as the target network side target from the network entity. The uplink PDCP service data unit is forwarded to the target primary network entity.

In the embodiment of the present application, before the target network side is in the target network side configuration effective state, the multi-connection user equipment configures the multi-connection user equipment to execute the terminal based on radio resource control or medium access control signaling. Uplink one-way transmission of data bearers between base stations to pass all uplink protocol data units for one of the downlink acknowledgement messages from the network entity that originally received the uplink protocol data unit can be continuously received by the multi-connected user equipment The preset network entity performs the one-way uplink transmission.

In the embodiment of the present application, after the multi-connection user equipment has performed the unidirectional uplink transmission, the target primary network entity constructs the uplink PDCP based on the sequence number status of the uplink PDCP protocol data unit counted by the target network. status report. And, the target primary network entity constructs an uplink PDCP status report based on the status of the protocol data unit in the second buffer area.

In the embodiment of the present application, the target network side is in the target network side configuration effective state, the target primary network entity triggers the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, the target network side is enabled. Security configuration

The data forwarding process when the multi-connection user equipment triggers the mobility access handover event is described in detail below through several specific embodiments.

The following embodiments are based on the same or similar application scenarios, and the application scenario may be:

The multi-connected user equipment accesses the source network side of the mobile communication network and performs data interaction communication. The source network side of the mobile communication network includes a source master network entity and at least one source slave network entity, wherein the source master network entity is a source anchor point of the multi-connection user equipment, that is, the multi-connection user equipment uses the source network side to perform data. During interactive communication, the user data of the multi-connection user equipment enters and exits the core network through the source anchor point, and the source slave network entity is the source data transmission point of the multi-connection user equipment. After the multi-connected user equipment moves to the overlapping of the signal coverage of the two network entities, the mobile communication network triggers a mobility access handover event to perform an anchor change. The anchor point is changed. The source primary network entity selects one of the network entities from the at least one source on the source network side as the target primary network entity based on the radio resource management policy of the multi-connection user equipment, and the target primary network entity is the target. The network side is in the target anchor point of the multi-connection user equipment when the configuration on the target network side takes effect.

The first specific embodiment performs data forwarding for downlink data, as shown in FIG. 2, and the specific process is as follows:

Before the target network side is configured to take effect on the target network side, the source primary network entity on the source network side in the mobile communication network sends a second cache area cache request to the target primary network entity on the target network side to request the target primary network entity. Second buffer area address;

The target primary network entity returns the second buffer address information to the source primary network entity in response to the second buffer cache request;

The source host network entity is based on the second cache area address information of the target primary network entity on the target network side, based on the second cache area address information of the target primary network entity on the target network side, and the source primary network entity has the first cache area The PDCP service data unit is forwarded to the second buffer area in the target primary network entity and cached; when the PDCP service data unit in the first buffer area of the source primary network entity is the source network side sorted service data unit The sequenced service data unit on the source network side needs to be forwarded together with the sequence number corresponding to the sorted service data unit on the source network side to the second buffer area in the target primary network entity, and cached.

The source master network entity will still send the PDCP protocol data unit originating from itself to the multi-connection user equipment directly;

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity serves as the target anchor point of the target network side, based on obtaining from the multi-connection user equipment. The PDCP status report and/or the status of the radio link layer control protocol based on the target primary network entity confirms the status, obtains the PDCP service data unit from the second buffer area and sends it to the multi-connected user equipment.

In a second specific embodiment, data forwarding is performed for uplink data, as shown in FIG. 3, and the specific process is as follows:

When the target network side is in the wireless configuration effective state, the target primary network entity acts as the target anchor point of the target network side, and transmits the last uplink protocol data unit termination identifier to the source primary network entity; and receives the last transmission of the target primary network entity. Before the uplink protocol data unit terminates the identification, the source primary network entity sorts the out-of-order uplink PDCP service data units, and then sequentially sends the sorted out-of-order uplink PDCP service data units to the core network; upon receiving the target primary network After the last uplink protocol data unit termination identifier transmitted by the entity, the source primary network entity sends the sorted out-of-order uplink PDCP service data unit along with the corresponding sequence number to the target primary network entity on the target network side. After receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity may forward the uplink PDCP service data unit to the target primary network entity as the target primary network entity on the target network side.

The target primary network entity sorts the uplink PDCP service data unit from the source primary network entity and the uplink PDCP service data unit received by the target network side in the target network side configuration effective state, and sorts the data to the core network.

The target primary network entity constructs an uplink PDCP status report based on the status of the uplink PDCP protocol data unit in the second buffer area; after the multi-connection user equipment has performed the one-way uplink transmission, the target primary network entity may also perform uplink based on the target network. The serial number status of the PDCP protocol data unit constructs an uplink PDCP status report.

In a third specific embodiment, one-way DRB data transmission is configured, as shown in FIG. 4, and the specific process is as follows:

Before the target network side is in the target network side configuration effective state, the multi-connection user equipment configures the multi-connection user equipment to perform DRB data uplink one-way transmission based on the radio resource control or the medium access control signaling, so that the multi-connection user equipment can perform the DRB Data is transmitted in one direction.

After the configuration is completed and validated, in the case that the downlink acknowledgement message from the network entity that originally received the uplink protocol data unit can be continuously received by the multi-connection user equipment, all uplink protocol data units are executed in one direction through a preset network entity. Line transfer.

In a fourth specific embodiment, the security configuration of the new target network side is applied, and the specific process is as follows:

The target network side is in the target network side configuration effective state, and the target primary network entity triggers the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, the security configuration on the target network side is enabled;

The multi-connection user equipment enables the PDCP serial number of the security context of the target network side based on the received display signaling transmitted from the target network side;

The multi-connection user equipment processes the PDCP data packet before a preset PDCP sequence number based on the security context of the source network side; and processes the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.

Based on the same inventive concept, a data forwarding device 100 is provided in the embodiment of the present application. For a specific implementation of the device, refer to the description of the method embodiment, and the repeated description is omitted.

As shown in Figure 5, the device includes a dual cache implementation module 110, a service data retransmission module 120;

among them,

The dual cache implementation module 110 is configured to: source the primary network entity on the source network side based on the second cache area address information of the target primary network entity on the target network side based on the second cache area address information of the target primary network entity on the target network side. The PDCP service data unit in the first buffer area is forwarded to the second buffer area of the target primary network entity on the target network side;

The service data retransmission module 120 is configured to obtain the PDCP service data unit from the second buffer area when the target network side is configured to be in the target network side and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment. And sent to the multi-connected user device.

In a possible implementation, the device further includes:

a second buffer area address information obtaining module, configured to send a second buffer area cache request to the target primary network entity to request address information of the second buffer area of the target primary network entity; and respond to the second buffer area cache request to the source The primary network entity returns the second buffer address information;

The second buffer area is buffered after the PDCP service data unit and the target network side from the source data entity of the source network entity and the corresponding sequence number and/or the unassigned sequence number are in the target network side configuration effective state. IP packets from the core network gateway.

When the target network side is in the target network side configuration effective state, and needs to newly transmit or retransmit the PDCP service data unit to the multi-connection user equipment, based on the uplink PDCP status report obtained from the multi-connection user equipment and/or based on the target network side The radio link layer control protocol acknowledges the status, obtains the PDCP service data unit from the second buffer area, and transmits it to the multi-connection user equipment.

In a possible implementation manner, the apparatus further includes an uplink protocol data unit termination identifier application module;

The uplink protocol data unit termination identifier application module is configured to: when the target network side is in the wireless configuration effective state, transmit the last uplink protocol data unit termination identifier to the source primary network entity; and, for receiving the target primary network entity transmission Sorting the out-of-order uplink PDCP service data units before the final uplink protocol data unit termination identifier, and then sequentially transmitting the sorted out-of-order uplink PDCP service data units to the core network; and, for receiving the target After the last uplink protocol data unit termination identifier transmitted by the primary network entity, the sorted out-of-order uplink PDCP service data unit is sent to the target primary network entity on the target network side along with the corresponding sequence number.

In a possible implementation, the uplink protocol data unit termination identifier application module is further configured to forward the uplink PDCP service data unit to the target primary network entity after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity. .

The unidirectional uplink transmission module is configured to perform, after the target network side is in the effective state of the target network side configuration, configure the multi-connection user equipment to perform the uplink one-way of the data bearer between the terminal and the base station based on the radio resource control or the medium access control signaling. The transmission is performed to perform one-way uplink transmission on all uplink protocol data units through a preset network entity in a case where the downlink acknowledgement message from the network entity that originally received the uplink protocol data unit can be continuously received by the multi-connection user equipment.

An uplink PDCP status report building module, configured to construct an uplink PDCP status report based on a protocol data unit status in the second buffer area; and configured to perform statistics based on the target network after the multi-connection user equipment has performed the one-way uplink transmission The serial number status of the uplink PDCP protocol data unit is constructed to construct an uplink PDCP status report.

In a possible implementation, the apparatus further includes a target network side full configuration enabling module;

The target network side full configuration enabling module is configured to be in the target network side configuration effective state on the target network side, triggering the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, enabling the security configuration on the target network side;

And, configured to enable a PDCP sequence number of the security context of the target network side based on the display signaling transmitted from the received target network side;

And, for processing the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.

Based on the same inventive concept, the embodiment of the present application further provides a mobile communication network 200. For the specific implementation of the mobile communication network 200, reference may be made to the description of the method embodiment, and details are not described herein again.

As shown in FIG. 6, the source network side of the mobile communication network 200 includes: a source master network entity 210, at least one source slave network entity wirelessly connected to the source master network entity 210, and a source master network entity 210 as a multi-connection user equipment. a source anchor point of 300, the source from the network entity being a source data transmission point of the multi-connection user equipment, at least one source from the network entity and the multi-connection user equipment 300 may be connected by a wireless network, and at least one source from one source of the network entity from the network The entity is used as the target primary network entity 220 by the source primary network entity 210 based on the wireless resource management policy of the multi-connection user equipment 300; the target primary network entity 220 is connected when the target network side of the mobile communication network 200 is in the target network side configuration effective state. The target anchor of the user device 300.

among them,

The source primary network entity 210 is configured to: based on the second cache area address information of the target primary network entity on the target network side, based on the second cache area address information of the target primary network entity on the target network side, the first of the source primary network entities The PDCP service data unit in the buffer area is forwarded to the second buffer area of the target primary network entity 220 on the target network side for buffering;

The target primary network entity 220 is configured to obtain the PDCP service data unit from the second buffer area when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment 300. And sent to the multi-connection user equipment 300;

The source primary network entity 210 is the source anchor point of the multi-connection user equipment 300, and the target primary network entity 220 is the target anchor point of the multi-connection user equipment 300 when the target network side is in the target network side configuration effective state; the target primary network entity 220 The source primary network entity 210 selects from the network entity based on at least one source on the source network side based on the radio resource management policy of the multi-connection user equipment 300.

In a possible implementation, the source primary network entity 210 is further configured to send a second cache buffer request to the target primary network entity 220 to request address information of the second cache area of the target primary network entity 220.

The target primary network entity 220 is further configured to: return, according to the second buffer cache request, the second cache area address information to the source primary network entity 210;

The second buffer area is buffered from the source data entity 210 and the corresponding sequence number and/or the unassigned sequence number of the PDCP service data unit and the target network side are in the target network side configuration effective state. After the IP packet from the core network gateway.

In a possible implementation manner, the target primary network entity 220 is specifically configured to:

When the target network side is in the target network side configuration effective state, and needs to retransmit the PDCP service data unit to the multi-connection user equipment 300, based on the uplink PDCP status report obtained from the multi-connection user equipment 300 and/or based on the target network side wireless The link layer control protocol acknowledges the status, obtains the PDCP service data unit from the second buffer area, and sends it to the multi-connection user equipment 300.

In a possible implementation manner, the target primary network entity 220 is further configured to: when the target network side is in the wireless configuration effective state, transmit the last uplink protocol data unit termination identifier to the source primary network entity 210;

The source primary network entity 210 is further configured to sort the out-of-order uplink PDCP service data units before receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity 220, and then sort the sorted out-of-order The uplink PDCP service data unit is sequentially sent to the core network; and is further configured to: after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity 220, the sorted out-of-order uplink PDCP service data unit is The corresponding serial number is sent to the target primary network entity 220 on the target network side.

In a possible implementation, the source primary network entity 210 is further configured to forward the uplink PDCP service data unit to the target primary network entity 220 after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity 220.

In a possible implementation manner, the mobile communication network 200 can enable the multi-connection user equipment 300 to configure the multi-connection user equipment 300 to perform based on radio resource control or medium access control signaling before the target network side is in the target network side configuration effective state. Uplink one-way transmission of data bearers between the terminal and the base station to pass all uplink protocol data units in case the downlink acknowledgement message from the network entity originally receiving the uplink protocol data unit can be continuously received by the multi-connection user equipment 300 A preset network entity performs one-way uplink transmission.

In a possible implementation, the target primary network entity 220 is further configured to construct an uplink PDCP status report based on the sequence number status of the uplink PDCP protocol data unit that is counted by the target network after the multi-connection user equipment 300 has performed the one-way uplink transmission. .

In a possible implementation manner, the target primary network entity 220 is further configured to construct an uplink PDCP status report based on the status of the protocol data unit in the second buffer area.

In a possible implementation, the target primary network entity 220 is further configured to be in the target network side configuration effective state on the target network side, triggering the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, enabling the target network side Security configuration; enabling the multi-connection user equipment 300 to enable the PDCP sequence number of the security context of the target network side based on the display signaling transmitted from the received target network side;

And causing the multi-connection user equipment 300 to process the PDCP data packet before a preset PDCP sequence number based on the security context of the source network side;

And, the multi-connection user equipment 300 processes the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.

Referring to FIG. 7, on the source network entity side of the source network side, the second data forwarding device provided by the embodiment of the present application includes:

The processor 500 is configured to read a program in the memory 520 and perform the following process:

The PDCP service data unit in the first buffer area of the source primary network entity on the source network side is forwarded to the target host on the target network side by the transceiver 510 based on the second cache area address information of the target primary network entity on the target network side. The second cache area of the network entity is cached, so that when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network The entity can obtain the PDCP service data unit from the second buffer area and send the PDCP service data unit to the multi-connection user equipment.

The transceiver 510 is configured to receive and transmit data under the control of the processor 500.

In addition, it should be noted that the processor 500 further has other functions of the source primary network entity on the source network side in the foregoing embodiment, and details are not described herein again.

Here, in FIG. 7, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 510 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

The processor 500 can be a central buried device (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (Complex Programmable Logic Device). , CPLD).

Correspondingly, on the target primary network entity side of the target network side, referring to FIG. 8, the third data forwarding device provided by the embodiment of the present application includes:

The processor 504 is configured to read a program in the memory 505 and perform the following process:

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the PDCP service data unit is obtained from the second buffer area of the target primary network entity. And transmitting to the multi-connection user equipment by the transceiver 501; wherein the PDCP service data unit is a second cache area address of the source main network entity on the source network side based on the target primary network entity on the target network side And forwarding the PDCP service data unit in the first buffer area of the source primary network entity to the second buffer area of the target primary network entity on the target network side.

The transceiver 501 is configured to receive and transmit data under the control of the processor 504.

In addition, it should be noted that the processor 504 further has other functions of the target primary network entity on the target network side in the foregoing embodiment, and details are not described herein again.

In FIG. 8, a bus architecture (represented by bus 506), which may include any number of interconnected buses and bridges, will include one or more processors represented by processor 504 and memory represented by memory 505. The various circuits are linked together. The bus 500 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein. Bus interface 503 provides an interface between bus 506 and transceiver 501. Transceiver 501 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium. Data processed by processor 504 is transmitted over wireless medium via antenna 502. Further, antenna 502 also receives data and transmits the data to processor 504.

The processor 504 is responsible for managing the bus 506 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 505 can be used to store data used by the processor 504 when performing operations.

Optionally, the processor 504 may be a CPU (Central Embedded Device), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). , complex programmable logic devices).

On the source network entity side of the source network side, a computer storage medium provided by the embodiment of the present application stores computer executable instructions for causing the computer to execute: based on a target of the target network side The second buffer area address information of the primary network entity forwards the PDCP service data unit in the first buffer area of the source primary network entity on the source network side to the second buffer area of the target primary network entity on the target network side, so that When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity can obtain the second cache area. The PDCP service data unit is sent to the multi-connection user equipment.

Correspondingly, in the target main network entity side of the target network side, the second computer storage medium provided by the embodiment of the present application stores computer executable instructions for causing the computer to execute: at the target When the network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the PDCP service data unit is obtained from the second buffer area of the target primary network entity and sent. Giving the multi-connection user equipment; wherein the PDCP service data unit is a source main network entity on the source network side, based on the second cache area address information of the target primary network entity on the target network side, the source primary network The PDCP service data unit in the first buffer area of the entity is forwarded to the second buffer area of the target primary network entity on the target network side.

Any of the computer storage media provided by the embodiments of the present application may be any available media or data storage device accessible by a computer, including but not limited to magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), Optical memories (such as CD, DVD, BD, HVD, etc.), and semiconductor memories (such as ROM, EPROM, EEPROM, NAND FLASH, SSD).

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A data forwarding method is applied to a mobile communication network; and the method includes:

The source primary network entity on the source network side in the mobile communication network forwards the PDCP service data unit in the first buffer area of the source primary network entity based on the second cache area address information of the target primary network entity on the target network side Cache to the second cache area of the target primary network entity on the target network side;

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity obtains the location from the second buffer area. Decoding the PDCP service data unit and transmitting the data to the multi-connection user equipment;

The source primary network entity is a source anchor point of the multi-connection user equipment, and the source from the network entity is a source data transmission point of the multi-connection user equipment, where the target primary network entity is a target anchor point of the multi-connection user equipment when the target network side is in a target network side configuration effective state; the target primary network entity is configured by the source primary network entity based on a radio resource management policy of the multi-connection user equipment At least one source on the source network side is selected from the network entity.
The data forwarding method according to claim 1, wherein the method further comprises:

Sending, by the source primary network entity, a second buffer cache request to the target primary network entity to request address information of the second cache area of the target primary network entity; the target primary network entity responding to the a second buffer area cache request, returning second buffer area address information to the source primary network entity;

The second buffer area is buffered by the PDCP service data unit and the target network side from the source data entity of the source primary network entity and the corresponding sequence number and/or unassigned sequence number. The IP packet from the core network gateway after the target network side is configured to take effect.
The data forwarding method according to claim 1, wherein the target network side is in a target network side configuration effective state, and when the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment The target primary network entity obtains the PDCP service data unit from the second buffer area and sends the PDCP service data unit to the multi-connection user equipment, specifically:

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be retransmitted to the multi-connection user equipment, the target primary network entity is obtained based on obtaining from the multi-connection user equipment. The uplink PDCP status report and/or the status of the radio link layer control protocol acknowledgement status based on the target network side, the PDCP service data unit is obtained from the second buffer area and sent to the multi-connection user equipment.
The data forwarding method according to claim 1, wherein the method further comprises:

Transmitting, by the target primary network entity, a final uplink protocol data unit termination identifier to the source primary network entity when the target network side is in a wireless configuration active state; receiving the received by the target primary network entity Before the last uplink protocol data unit terminates the identifier, the source primary network entity sorts the out-of-order uplink PDCP service data units, and then sequentially sends the sorted out-of-order uplink PDCP service data units to the core network; After receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity sends the sorted out-of-order uplink PDCP service data unit along with the corresponding sequence number. To the target primary network entity on the target network side.
The data forwarding method according to claim 4, wherein the method further comprises:

After receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the source primary network entity forwards the uplink PDCP service data unit from the network entity as a target of the target network side. Give the target primary network entity.
The data forwarding method according to any one of claims 1 to 5, wherein before the target network side is in the target network side configuration effective state, the method further includes:

The multi-connection user equipment configures the multi-connection user equipment to perform uplink one-way transmission of data bearers between the terminal and the base station based on radio resource control or medium access control signaling, in the network from the original uplink protocol data unit. When the downlink acknowledgement message of the entity is continuously received by the multi-connected user equipment, the one-way uplink transmission is performed by a preset network entity for all uplink protocol data units.
The data forwarding method according to claim 6, wherein after the multi-connection user equipment has performed one-way uplink transmission, the method further includes:

The target primary network entity constructs the uplink PDCP status report based on a sequence number status of an uplink PDCP protocol data unit counted by the target network.
The data forwarding method according to any one of claims 1 to 5, wherein the method further comprises:

The target primary network entity constructs an uplink PDCP status report based on the status of the protocol data unit in the second buffer area.
The data forwarding method according to any one of claims 1 to 5, wherein the method further comprises:

The target network side is in the target network side configuration effective state, the target primary network entity triggers the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, the security configuration on the target network side is enabled;

The multi-connection user equipment enables the PDCP sequence number of the security context of the target network side based on the received display signaling sent by the target network side;

The multi-connection user equipment processes a PDCP data packet before a preset PDCP sequence number based on a security context of the source network side;

The multi-connection user equipment processes the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.
A data forwarding device is applied to a mobile communication network; and the method includes:

a dual-cache implementation module, configured to forward the PDCP service data unit in the first buffer area of the source primary network entity on the source network side to the target network side based on the second cache area address information of the target primary network entity on the target network side Cache in the second cache area of the target primary network entity;

a service data retransmission module, configured to: when the target network side is in a target network side configuration effective state, and needs to newly send or resend the PDCP service data unit to the multi-connection user equipment, from the second buffer area Obtaining the PDCP service data unit and transmitting the PDCP service data unit to the multi-connection user equipment.
The data forwarding device according to claim 10, wherein the device further comprises:

a second buffer area address information obtaining module, configured to send a second buffer area cache request to the target primary network entity to request address information of the second buffer area of the target primary network entity; a second buffer area cache request, returning second buffer area address information to the source primary network entity;

The second buffer area is buffered by the PDCP service data unit and the target network side from the source data entity of the source primary network entity and the corresponding sequence number and/or unassigned sequence number. The IP packet from the core network gateway after the target network side is configured to take effect.
The data forwarding device according to claim 10, wherein the service data retransmission module is specifically configured to:

When the target network side is in the target network side configuration effective state, and needs to retransmit the PDCP service data unit to the multi-connection user equipment, based on the uplink PDCP status report obtained from the multi-connection user equipment and And/or obtaining the PDCP service data unit from the second buffer area and transmitting to the multi-connection user equipment based on a radio link layer control protocol acknowledgement status of the target network side.
The data forwarding device according to claim 10, wherein the device further comprises an uplink protocol data unit termination identifier application module;

The uplink protocol data unit termination identifier application module is configured to: when the target network side is in a wireless configuration active state, transmit a last uplink protocol data unit termination identifier to the source primary network entity; and, for receiving Before the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the out-of-order uplink PDCP service data units are sorted, and then the sorted out-of-order uplink PDCP service data units are sequentially sent. And to the core network; and, after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, the sorted out-of-order uplink PDCP service data unit is associated with the corresponding The serial number is sent to the target primary network entity on the target network side.
A data forwarding device according to claim 13 wherein:

The uplink protocol data unit termination identifier application module is further configured to: after receiving the last uplink protocol data unit termination identifier transmitted by the target primary network entity, forwarding the uplink PDCP service data unit to the Target primary network entity.
The data forwarding device according to claim 10, wherein the device further comprises a one-way uplink transmission module;

The unidirectional uplink transmission module is configured to configure the multi-connection user equipment to perform the terminal and the base station based on the radio resource control or the medium access control signaling before the target network side is in the target network side configuration effective state. Uplink one-way transmission of data between the two, so that in the case that the downlink acknowledgement message from the network entity that originally received the uplink protocol data unit can be continuously received by the multi-connected user equipment, a preset is adopted for all uplink protocol data units. The network entity performs the one-way uplink transmission.
The data forwarding device according to any one of claims 10 to 15, wherein the device further comprises an uplink PDCP status report construction module;

The uplink PDCP status report construction module is configured to construct an uplink PDCP status report based on a protocol data unit status in the second buffer area; and, after the multi-connection user equipment has performed one-way uplink transmission, The uplink PDCP status report is constructed based on a sequence number status of an uplink PDCP protocol data unit counted by the target network.
The data forwarding device according to any one of claims 10 to 15, wherein the device further comprises a target network side full configuration enabling module;

The target network side full configuration enabling module is configured to be in the target network side configuration effective state on the target network side, triggering the core network to generate a path switching operation, and after obtaining the returned path conversion confirmation message, enabling the target network side Security configuration

And for enabling the PDCP sequence number of the security context of the target network side based on the received display signaling sent by the target network side;

And, for processing a PDCP data packet before a preset PDCP sequence number based on a security context of the source network side;

And for processing the PDCP data packet after the preset PDCP sequence number based on the security context of the target network side.
A data forwarding device, comprising:

a memory for storing program instructions;

a processor, configured to invoke a program instruction stored in the memory, and execute according to the obtained program:

Forwarding the PDCP service data unit in the first buffer area of the source primary network entity on the source network side to the second target network entity on the target network side based on the second buffer area address information of the target primary network entity on the target network side Caching in the buffer area, so that when the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity can The PDCP service data unit is obtained in the second buffer area and sent to the multi-connection user equipment.
A data forwarding device, comprising:

a memory for storing program instructions;

a processor, configured to invoke a program instruction stored in the memory, and execute according to the obtained program:

When the target network side is in the target network side configuration effective state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the PDCP service data unit is obtained from the second buffer area of the target primary network entity. And sending to the multi-connection user equipment, where the PDCP service data unit is a source network entity on the source network side, based on the second cache area address information of the target primary network entity on the target network side, the source is the source The PDCP service data unit in the first buffer area of the primary network entity is forwarded to the second buffer area of the target primary network entity of the target network side.
A computer storage medium, characterized in that the computer storage medium stores computer executable instructions for causing the computer to execute: a second buffer area based on a target primary network entity of a target network side Address information, the PDCP service data unit in the first buffer area of the source primary network entity on the source network side is forwarded to the second cache area of the target primary network entity on the target network side, so that the target network side is in the target When the network side configuration is in an active state, and the PDCP service data unit needs to be newly sent or retransmitted to the multi-connection user equipment, the target primary network entity can obtain the PDCP service data unit from the second buffer area and send the PDCP service data unit. Giving the multi-connected user device.
A computer storage medium, characterized in that the computer storage medium stores computer executable instructions for causing the computer to execute: the target network side is configured to be in a target network side effective state, and is required When the PDCP service data unit is newly sent or retransmitted to the multi-connection user equipment, the PDCP service data unit is obtained from the second buffer area of the target primary network entity and sent to the multi-connection user equipment; a PDCP service data unit, where the source primary network entity on the source network side is based on the second cache area address information of the target primary network entity on the target network side, and the PDCP service data unit in the first buffer area of the source primary network entity Forwarded to the second cache area of the target primary network entity on the target network side.