CN107438273B

CN107438273B - Method and device for determining data processing state in bearer transfer

Info

Publication number: CN107438273B
Application number: CN201610357327.3A
Authority: CN
Inventors: 刘星
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-26
Filing date: 2016-05-26
Publication date: 2021-07-30
Anticipated expiration: 2036-05-26
Also published as: CN107438273A

Abstract

The invention provides a method and a device for determining a data processing state in bearer transfer, wherein the method comprises the following steps: the UE receives a PDCP control PDU sent by a source base station, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the source base station; and after the UE delivers the corresponding PDCP data SDU to an upper layer according to the PDCP control PDU, the UE determines that all downlink data on the shunting bearer are processed. By adopting the technical scheme, the problem that whether the transmission of the uplink and downlink data in the shunting bearer is finished or not cannot be timely known by the UE or the base station side in the related technology is solved, and the UE or the base station side timely and accurately confirms that the transmission of the uplink and downlink data is finished.

Description

Method and device for determining data processing state in bearer transfer

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining a data processing state in bearer transfer.

Background

Fig. 1 is a schematic diagram of a User Plane Data Protocol stack of Long-term evolution (LTE) in the related art, and as shown in fig. 1, downlink Data received by a base station (Evolved Node B, eNB) from a Core Network (Core Network, CN) through a User Plane GPRS tunnel Protocol (GTP-U, GPRS tunneling Protocol for the User Plane) is unpacked and then processed through a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) Protocol layer, a Medium Access Control (MAC) Protocol layer, and a Physical layer (PHY) and then sent to a User Equipment (User Equipment, UE); the transmission of the upstream data is opposite to that of the downstream data.

Fig. 2 is a schematic diagram of an enhanced user plane data protocol stack for bearer transfer in the related art, and fig. 2 shows an enhanced user plane data protocol stack adopted when a UE is handed over from a Source base station (Source eNB, abbreviated as S-eNB) to a Target base station (Target eNB, abbreviated as T-eNB) or when part or all of a user plane bearer (bearer) is transferred from the Source base station to the Target base station. For any user plane Bearer transferred from the source base station to the target base station by the UE, in addition to establishing a new user plane Bearer after the transfer on the UE and the target base station, the original Bearer on the UE and the source base station needs to be changed to a Split Bearer (Split Bearer). In the downlink direction, all the source base stations receive data packets from the core network through the S1 interface, and the source base stations respectively send the data packets to the source base station and the target base station through the offload bearer until the last data packet from the core network is received. In the uplink direction, the UE sends a data packet to the source base station by splitting the part carried on the source base station and the part carried on the target base station. When the part of the data packets which are carried on the target base station in the shunting way receives the data packets from the UE, the data packets are forwarded to the source base station for processing. And after the UE is successfully accessed to the target base station, the subsequent uplink data packet is sent by the new user plane after the transfer.

For the UE, it may receive the data from the new bearer before the downlink data on the offload bearer is received and processed, and the UE may start to submit the downlink data from the new bearer to the upper layer after the downlink data on the offload bearer is received and processed and is submitted to the upper layer. For the target base station, it may also be that the source base station receives the uplink data from the new bearer before receiving and processing all the uplink data from the split bearer, and the target base station needs to wait until the source base station receives and processes all the uplink data from the split bearer and delivers all the uplink data to the core network before beginning to deliver the uplink data from the new bearer to the core network.

When all the uplink data and the downlink data have been sent, the network may also trigger deletion of the offload bearer.

Meanwhile, fig. 2 shows a common offloading manner for offloading bearers, that is, data is offloaded between the PDCP layer and the RLC layer and is delivered to the source base station and the target base station, respectively. Data may also be offloaded at RLC, MAC, or PHY.

In the prior art, an effective solution is not available for the problem that the UE or the base station side cannot timely know whether transmission of uplink and downlink data in a split bearer is completed.

Disclosure of Invention

The embodiment of the invention provides a method and a device for determining a data processing state in bearer transfer, which are used for at least solving the problem that UE (user equipment) or a base station side in the related art cannot timely know whether transmission of uplink and downlink data in a shunting bearer is finished.

According to an embodiment of the present invention, a method for determining a data processing status in bearer forwarding is provided, including: user Equipment (UE) receives a Packet Data Convergence Protocol (PDCP) control Protocol Data Unit (PDU) sent by a source base station, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the source base station, and carries a PDCP Sequence Number (SN) of a last downlink PDCP data Service Data Unit (SDU) and indication information, wherein the indication information is used for indicating that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU; and after the UE delivers the corresponding PDCP data SDU to an upper layer according to the PDCP control PDU, the UE determines that all downlink data on the shunting bearer are processed.

Optionally, before the UE determines that the processing of the downlink data on the offload bearer is completed, the method further includes: the UE determines that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last downlink PDCP data SDU according to the indication information; and the UE acquires the PDCP SN of the last downlink PDCP data SDU through the PDCP control PDU, and delivers the received last downlink PDCP data SDU and all downlink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to an upper layer in sequence.

Optionally, after determining that all downlink data on the split bearer are processed, the UE triggers a PDCP entity of the new bearer to deliver the downlink data to an upper layer.

Optionally, after determining that all downlink data on the offload bearer is processed, the UE notifies a Control plane base station, through a Radio Resource Control (RRC) message, that all downlink data on the offload bearer has been processed or that downlink data on one or more offload bearers has been processed.

According to an embodiment of the present invention, a method for determining a data processing status in bearer forwarding is provided, including: a PDCP entity carried by a source base station forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating UE to determine that all downlink data carried by a shunting bearer are processed, and the PDCP control PDU carries a PDCP SN of the last downlink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU; the source base station transmits the PDCP control PDU to the UE.

Optionally, the method further comprises: when the source base station sends all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station, the source base station notifies the control plane base station through an X2 message that the source base station portion of the offload bearer completes downlink data transmission or that one or more source base station portions of the offload bearer complete downlink data transmission.

Optionally, the method further comprises: when the source base station sends all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the split bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that the source base station portion of the split bearer completes downlink data sending and all uplink data have been processed, or the source base station portion on one or more split bearers completes downlink data sending and all uplink data have been received and processed.

According to an embodiment of the present invention, a method for determining a data processing status in bearer forwarding is provided, including: a source base station receives a PDCP control PDU sent by UE, wherein the PDCP control PDU is composed of a PDCP entity carried by a UE upper shunt, and carries a PDCP SN of a last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU; and after the source base station delivers the corresponding PDCP data SDU to a service network management S-GW according to the PDCP control PDU, the source base station determines that all uplink data on the shunting load are received and processed.

Optionally, before the source base station determines that all uplink data on the split bearer are received and processed, the method further includes: the source base station determines that the PDCP control PDU is the PDCP control PDU of the PDCP SN carrying the last uplink PDCP data SDU according to the indication information; and the source base station acquires the PDCP SN of the last uplink PDCP data SDU through the PDCP control PDU, and delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

Optionally, after the source base station determines that all uplink data on the offloaded bearer are received and processed, the source base station notifies the target base station through an X2 message, and the PDCP entity of the new bearer corresponding to the offloaded bearer may start to deliver uplink data to the S-GW in sequence.

Optionally, the method further comprises: after the source base station determines that the uplink data on one or more of the split bearers is received and processed, the source base station indicates, through an X2 message, that a new bearer corresponding to the one or more split bearers on the target base station may start to deliver uplink data to the S-GW in sequence.

Optionally, the transmission manner of the X2 message between the source base station and the target base station includes one of the following: sending the message from the source base station to the target base station, and forwarding the X2 message of the source base station to the target base station through a core network, or forwarding the X2 message of the source base station to the target base station through a control plane base station.

Optionally, the information carried by the X2 message includes one of: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an evolved EPS bearer of a core packet network; shunting the PDCP SN of the last uplink PDCP data SDU on the bearer or shunting the PDCP SN of the first uplink PDCP data SDU on the new bearer; the PDCP entity triggering the new bearer at the target base station may deliver the indication information of the uplink data to the S-GW in sequence.

Optionally, the method further comprises: when the source base station determines that all uplink data on the split bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that all uplink data on the split bearer have been received and processed, or all uplink data on one or more split bearers have been received and processed.

According to an embodiment of the present invention, a method for determining a data processing status in bearer forwarding is provided, including: a PDCP entity carried by a UE in a shunting way forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating a source base station to determine that all uplink data carried by the shunting way are processed, and the PDCP control PDU carries a PDCP SN of the last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU; the UE transmits the PDCP control PDU to the source base station.

According to an embodiment of the present invention, a method for determining a data processing status in bearer forwarding is provided, including: a control plane base station receives a notification message, wherein the notification message is used for notifying the control plane base station that uplink and/or downlink data of one or more offload bearers have been processed; and the control plane base station determines that the uplink and/or downlink data of the one or more split bearers have been processed according to the notification message.

Optionally, the notification message is sent to the control plane base station through at least one of the following devices: a source base station, a target base station and user equipment UE.

Optionally, the notification message is used for sending, by the source base station, to the control plane base station to notify the control plane base station when the source base station sends, to the UE or forwards, to the target base station, all downlink data packets from the S-GW before all the end identifier packets: the source base station part on the offload bearer completes downlink data transmission, or the source base station part on the one or more offload bearers completes downlink data transmission.

Optionally, the notification message is used for sending, by the source base station, to the control plane base station to notify the control plane base station of notification that all uplink data on the offload bearer have been received and processed by the source base station: and after receiving and processing all uplink data of the offload bearer, or after receiving and processing all uplink data of the one or more offload bearers.

Optionally, the notification message is used for, when the source base station sends all downlink data packets from the serving gateway before the end identification packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the offload bearer have been received and processed, notifying, by the source base station, the control plane base station: the source base station part on the shunting bearers completes downlink data transmission and all uplink data are received and processed, or the source base station part on one or more shunting bearers completes downlink data transmission and all uplink data are received and processed.

Optionally, the notification message includes: the notification message is an X2 message, and the sending mode of the X2 message comprises the following steps: the method comprises the steps that a source base station sends to a control plane base station, and an X2 message of the source base station is forwarded to the control plane base station through a core network; the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; and the source base station of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the notification message is used for sending, by the target base station, to the control plane base station to notify the control plane base station when the target base station completes sending all PDCP data PDUs before the end of the identification packet: the target base station part on the offload bearer completes downlink data transmission, or the target base station part on the one or more offload bearers completes downlink data transmission.

Optionally, the notification message includes: the notification message is an X2 message, and the sending mode of the X2 message comprises one of the following modes: the target base station sends the information to the control plane base station, and the X2 information of the target base station is forwarded to the control plane base station through the core network; the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; and the target base station part of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the notification message is used for sending, by the UE, to the control plane base station to notify the control plane base station when the UE determines that all downlink data on the offload bearer has been received and processed: all downlink data of the offload bearer has been received and processed, or all downlink data on the one or more offload bearers has been received and processed.

Optionally, the notification message is sent by the UE to the control plane base station through an RRC message.

Optionally, after the control plane base station determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message, the control plane base station sends an RRC connection release reconfiguration message for indicating the offload bearers to the UE.

Optionally, after the control plane base station determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message, the control plane base station sends an offload bearer release message to the source base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message is used to instruct the source base station to delete a user plane protocol stack of the offload bearer on the source base station and release offload bearer resources.

Optionally, after the control plane base station determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message, the control plane base station sends an offload bearer release message to the target base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message instructs the target base station to delete a user plane protocol stack of the offload bearer on the target base station and release offload bearer resources.

Optionally, after the control plane base station determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message, the control plane base station sends a source base station deletion message to a source base station, where the source base station deletion message includes an auxiliary base station Release message SeNB Release Request and/or a UE Context Release message Context Release.

According to another embodiment of the present invention, there is provided an apparatus for determining a data processing status in bearer forwarding, including: a first receiving module, configured to receive a packet data convergence protocol PDCP control protocol data unit PDU sent by a source base station, where the PDCP control PDU is composed of a PDCP entity that is shunted and carried by the source base station, and the PDCP control PDU carries a PDCP sequence number SN of a last downlink PDCP data service data unit SDU and indication information, where the indication information is used to indicate that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last downlink PDCP data SDU; and the first determining module is connected with the first receiving module and used for determining that all downlink data on the shunting bearer are processed completely after the corresponding PDCP data SDU is submitted to an upper layer according to the PDCP control PDU.

Optionally, the first determining module is further configured to determine, before it is determined that all downlink data on a offload bearer are processed, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last downlink PDCP data SDU according to the indication information; the first determining module is further configured to obtain a PDCP SN of a last downlink PDCP data SDU through the PDCP control PDU, and deliver the received last downlink PDCP data SDU and all downlink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to an upper layer in sequence.

Optionally, the first determining module is further configured to trigger a PDCP entity of the new bearer to deliver downlink data to an upper layer after determining that all downlink data on the offloaded bearer have been processed.

Optionally, the first determining module is further configured to notify, through a radio resource control RRC message, the control plane base station that all downlink data on the split bearer has been processed or that downlink data on one or more split bearers has been processed after determining that all downlink data on the split bearer has been processed.

According to an embodiment of the present invention, there is provided an apparatus for determining a data processing status in bearer forwarding, applied to a source base station, the apparatus including: a first forming module, configured to form a PDCP control PDU by a PDCP entity of a offload bearer in a source base station, where the PDCP control PDU is used to instruct a UE to determine that all downlink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last downlink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU; a first sending module, connected to the first forming module, for sending the PDCP control PDU to the UE.

Optionally, the apparatus further comprises: a first notification module, connected before the first component module, configured to notify the control plane base station, through an X2 message, that the source base station portion of the split bearer completes downlink data transmission or that one or more source base station portions of the split bearer complete downlink data transmission after the source base station transmits all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station.

Optionally, the apparatus further comprises: a second notification module, connected to the front of the first component module, configured to notify the control plane base station, through an X2 message, that the source base station portion of the split bearer completes downlink data transmission and all uplink data have been processed, or that the source base station portion of one or more split bearers completes downlink data transmission and all uplink data have been received and processed, after the source base station transmits all downlink data packets from the S-GW and before the end identification packet to the UE or forwards all downlink data packets to the target base station, and it is determined that all uplink data on the split bearer have been received and processed.

According to an embodiment of the present invention, there is provided an apparatus for determining a data processing status in bearer forwarding, applied to a source base station, including: a second receiving module, configured to receive a PDCP control PDU sent by a UE, where the PDCP control PDU is composed of a PDCP entity that is offloaded and carried on the UE, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU; and the second determining module is connected with the second receiving module and used for determining that all uplink data on the shunting bearer are received and processed completely after the corresponding PDCP data SDU is submitted to the S-GW according to the PDCP control PDU.

Optionally, the second determining module is further configured to determine, before it is determined that all uplink data on the offload bearer are received and processed, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last uplink PDCP data SDU according to the indication information; the second determining module is further configured to obtain a PDCP SN of a last uplink PDCP data SDU through the PDCP control PDU, and the source base station delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

Optionally, the second determining module is further configured to notify, through an X2 message, the target base station after the source base station determines that all uplink data on the offloaded bearer are received and processed, and the PDCP entity of the new bearer corresponding to the offloaded bearer may start to deliver uplink data to the S-GW in sequence.

Optionally, the apparatus further comprises: the second determining module is further configured to indicate, through an X2 message, that a new bearer corresponding to the one or more offload bearers on the target base station may start to deliver uplink data to the S-GW in sequence after the source base station determines that reception and processing of uplink data on the one or more offload bearers are completed.

Optionally, the second determining module is further configured to notify, through an X2 message, the control plane base station that all uplink data on the offload bearer have been received and processed, or all uplink data on one or more offload bearers have been received and processed, after the source base station determines that all uplink data on the offload bearer have been received and processed.

According to an embodiment of the present invention, there is provided an apparatus for determining a data processing status in bearer transfer, applied to a UE, the apparatus including: a second forming module, configured to form a PDCP control PDU by a PDCP entity of a offload bearer on a UE, where the PDCP control PDU is used to instruct a source base station to determine that all uplink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU of a PDCP psn carrying the last uplink PDCP data SDU; and the second sending module is connected with the second composition module and used for sending the PDCP control PDU to the source base station.

According to an embodiment of the present invention, there is provided an apparatus for determining a data processing state in bearer transfer, where the apparatus is applied to a control plane base station, and the apparatus includes: a third receiving module, configured to receive a notification message, where the notification message is used to notify the control plane base station that processing of uplink and/or downlink data of one or more offload bearers has been completed; and a third determining module, connected to the third receiving module, configured to determine, according to the notification message, that processing of the uplink and/or downlink data of the one or more offload bearers has been completed.

Optionally, the notification message includes: the notification message is an X2 message, and the sending mode of the X2 message comprises the following steps: the method comprises the steps that a source base station sends to a control plane base station, and an X2 message of the source base station is forwarded to the control plane base station through a core network;

the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; and the source base station of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the notification message includes: the notification message is an X2 message, and the sending mode of the X2 message comprises one of the following modes: the target base station sends the information to the control plane base station, and the X2 information of the target base station is forwarded to the control plane base station through the core network;

the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; and the target base station part of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the apparatus further comprises: a first indication module, connected to the third determination module, configured to send an RRC connection release reconfiguration message for indicating offloading of bearers to the UE.

Optionally, the apparatus further comprises: and a second indication module, connected to the third determination module, configured to send an offload bearer release message to the source base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message is used to indicate the source base station to delete a user plane protocol stack offloaded and borne on the source base station and release an offload bearer resource.

Optionally, the apparatus further comprises: and a third indication module, connected to the third determination module, configured to send a offload bearer release message to the target base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message indicates the target base station to delete a user plane protocol stack offloaded and borne on the target base station and release offload bearer resources.

Optionally, the apparatus further comprises: and the fourth indicating module is connected with the third determining module and is used for sending source base station deletion messages to the source base station, wherein the source base station deletion messages comprise auxiliary base station Release messages SeNB Release Request and/or UE Context Release messages Context Release.

According to still another embodiment of the present invention, there is also provided a storage medium. The storage medium is configured to store program code for performing the steps of:

the method comprises the steps that User Equipment (UE) receives a Packet Data Convergence Protocol (PDCP) control Protocol Data Unit (PDU) sent by a source base station, wherein the PDCP control PDU is composed of a PDCP entity which is shunted and carried on the source base station, and carries a PDCP Serial Number (SN) of a last downlink PDCP data Service Data Unit (SDU) and indication information, wherein the indication information is used for indicating that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

and after the UE delivers the corresponding PDCP data SDU to an upper layer according to the PDCP control PDU, the UE determines that all downlink data on the shunting bearer are processed.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

a PDCP entity carried by a source base station forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating UE to determine that all downlink data carried by a shunting bearer are processed, and the PDCP control PDU carries a PDCP SN of the last downlink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

the source base station transmits the PDCP control PDU to the UE.

a source base station receives a PDCP control PDU sent by UE, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the UE and carries a PDCP SN of the last uplink PDCP data SDU and indication information, and the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

and after the source base station delivers the corresponding PDCP data SDU to a service network management S-GW according to the PDCP control PDU, the source base station determines that all uplink data on the shunting load are received and processed.

a PDCP entity carried by a UE in a shunting way forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating a source base station to determine that all uplink data carried by the shunting way are processed, and the PDCP control PDU carries a PDCP SN of the last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

the UE transmits the PDCP control PDU to the source base station.

a control plane base station receives a notification message, wherein the notification message is used for notifying the control plane base station that uplink and/or downlink data of one or more offload bearers have been processed;

and the control plane base station determines that the uplink and/or downlink data of the one or more split bearers have been processed according to the notification message.

According to the invention, in the process of bearer transfer, after the source base station or the UE receives the last uplink or downlink data, the PDCP entities of the shunting bearer of the source base station or the UE form the PDCP control PDU, the source base station or the UE respectively sends the PDCP control PDU to the UE or the source base station, and the equipment receiving the PDCP control PDU can determine that the downlink or the uplink of the shunting bearer is processed according to the PDCP control PDU. By adopting the technical scheme, the problem that whether the transmission of the uplink and downlink data in the shunting bearer is finished or not cannot be timely known by the UE or the base station side in the related technology is solved, and the UE or the base station side timely and accurately confirms that the transmission of the uplink and downlink data is finished.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic diagram of a user plane data protocol stack of Long-term evolution (LTE) in the related art;

fig. 2 is a diagram of an enhanced user plane data protocol stack for bearer forwarding in the related art;

fig. 3 is a first flowchart of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 4 is a flowchart ii of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for determining a data processing status in bearer transfer according to an embodiment of the present invention;

fig. 6 is a flowchart of a method for determining a data processing status in bearer transfer according to an embodiment of the present invention;

fig. 7 is a flowchart of a method for determining a data processing status in bearer transfer according to an embodiment of the present invention;

FIG. 8 is a diagram illustrating a new PDCP control PDU according to an alternative embodiment of the present invention;

FIG. 9 is a detailed flow diagram of upstream and downstream data processing according to an alternative embodiment of the present invention;

fig. 10 is a diagram of a control plane base station according to an alternative embodiment of the present invention, which is directed to uplink and downlink data processing according to a notification message;

fig. 11 is a diagram of an alternative control plane base station for uplink and downlink data processing according to a notification message according to an alternative embodiment of the present invention;

fig. 12 is a first block diagram of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 13 is a block diagram of a second apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 14 is a block diagram of a third apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 15 is a block diagram of a fourth apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 16 is a block diagram of a fifth apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 17 is a block diagram six of a structure of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 18 is a block diagram of a seventh apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 19 is a block diagram of an eighth apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 20 is a block diagram of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 21 is a block diagram of a tenth structural diagram of an apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention;

fig. 22 is a block diagram of an eleventh configuration of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The device receives the end identification packet, which indicates that the IP data packet received before the end identification packet is the last IP data packet from the service network manager.

The purpose of the application is to implement that in the use of an enhanced user plane data protocol stack, a network judges and learns that the sending and processing of uplink data on a split bearer are completed, and after all uplink data are delivered to a core network, a new bearer on a target base station is triggered to deliver the uplink data to the core network, and notifies a control plane base station that all uplink data are sent completely, and judges and learns that the sending and processing of downlink data on the split bearer are completed, and after all downlink data are delivered to an upper layer of a UE, the new bearer on the UE is triggered to deliver the downlink data to the upper layer of the UE, and notifies the control plane base station that all downlink data are sent completely.

Example 1

The embodiment of the present application may be operated in a Long Term Evolution (LTE) system (including but not limited to the LTE system), and a network architecture of a network of the system may include a network side device (e.g., a base station) and a terminal. In this embodiment, a handover method capable of operating on the network architecture is provided, and it should be noted that an operating environment of the handover method provided in this embodiment is not limited to the network architecture.

In this embodiment, a method for determining a data processing state in bearer transfer operating in the network architecture is provided, and fig. 3 is a first flowchart of a method for determining a data processing state in bearer transfer according to an embodiment of the present invention, as shown in fig. 3, the flowchart includes the following steps:

step S302, a user equipment UE receives a packet data convergence protocol PDCP control protocol data unit PDU sent by a source base station, wherein the PDCP control PDU is composed of a PDCP entity shunted and carried by the source base station, and carries a PDCP serial number SN of a last downlink PDCP data service data unit SDU and indication information, wherein the indication information is used for indicating that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

step S304, after the UE delivers the corresponding PDCP data SDU to the upper layer according to the PDCP control PDU, the UE determines that all downlink data on the offload bearer is processed.

Alternatively, the execution subject of the above steps may be a terminal or the like, but is not limited thereto.

Optionally, before the UE determines that the processing of the downlink data on the offload bearer is completed, the UE determines, according to the indication information, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last downlink PDCP data SDU; the UE acquires the PDCP SN of the last downlink PDCP data SDU through the PDCP control PDU, and delivers the received last downlink PDCP data SDU and all downlink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to an upper layer in sequence.

Optionally, after determining that all downlink data on the split bearer is processed, the UE notifies the control plane base station that all downlink data on the split bearer has been processed or downlink data on one or more split bearers has been processed through a radio resource control RRC message.

Fig. 4 is a second flowchart of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 4, the flowchart includes the following steps:

s402, a PDCP entity carried by a source base station forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating UE to determine that all downlink data carried by a shunting bearer are processed, and the PDCP control PDU carries a PDCP SN of the last downlink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

s404, the source base station sends the PDCP control PDU to the UE.

Optionally, after the source base station sends all downlink data packets from the S-GW before the end identifier packet to the UE or forwards the downlink data packets to the target base station, the source base station notifies the control plane base station through an X2 message that the source base station portion of the offload bearer completes downlink data transmission or that one or more source base station portions of the offload bearer complete downlink data transmission.

Optionally, when the source base station sends all downlink data packets from the S-GW before the end identifier packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the offload bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that the source base station of the offload bearer partially completes downlink data sending and all uplink data have been processed, or the source base station of one or more offload bearers partially completes downlink data sending and all uplink data have been received and processed.

The methods described in fig. 3 and 4 are methods for downlink data, and a detailed flow for determining completion of downlink data transmission for downlink data is as follows: after receiving an End marker packet (End marker packet) from a core network, specifically, from a Serving Gateway (S-GW), the source base station indicates that an IP packet received before the End marker packet is the last IP packet from the Serving Gateway. After a PDCP entity shunted and loaded on the source base station allocates a PDCP SN (Sequence Number) to the last IP packet, a PDCP SN of the last downlink PDCP Data PDU (Protocol Data Unit) or corresponding SDU (Serving Data Unit) is obtained. And the PDCP entity carried by the source base station is shunted to form a PDCP control PDU which carries the PDCP SN of the last downlink PDCP data SDU. Meanwhile, the PDCP control PDU carries indication information indicating that the PDCP control PDU is a PDCP SN PDCP control PDU carrying the last downlink PDCP data SDU. And the source base station sends the PDCP control PDU to the UE through the shunt bearer. And the PDCP entity of the UE for shunting the load judges that the PDCP control PDU is the PDCP control PDU of the PDCP SN carrying the last downlink PDCP data SDU through the indication information in the PDCP packet header. And the UE acquires the PDCP SN of the last downlink PDCP data SDU through the PDCP control PDU. And when the UE receives the last downlink PDCP data SDU and all downlink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SNs of the last downlink PDCP data SDU and delivers the downlink PDCP data SDUs to an upper layer in sequence, the UE judges that all downlink data on the shunting bearer have been received and processed.

After the UE determines that all downlink data on the split bearer have been received and processed, the UE triggers a PDCP entity of the new bearer to deliver the downlink data to the upper layer.

Fig. 5 is a flowchart of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention, where as shown in fig. 5, the flowchart includes the following steps:

s502, a source base station receives a PDCP control PDU sent by UE, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the UE, and carries a PDCP SN of the last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

s504, after the source base station delivers the corresponding PDCP data SDU to the service network management S-GW according to the PDCP control PDU, the source base station determines that all the uplink data on the shunting load are received and processed.

Optionally, before the source base station determines that all uplink data on the offload bearer are received and processed, the source base station determines, according to the indication information, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last uplink PDCP data SDU; the source base station obtains the PDCP SN of the last uplink PDCP data SDU through the PDCP control PDU, and the source base station delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

Optionally, after determining that the uplink data on one or more of the split bearers is received and processed, the source base station indicates, through an X2 message, that a new bearer corresponding to the one or more split bearers on the target base station may start to deliver uplink data to the S-GW in sequence.

Optionally, the transmission mode of the X2 message between the source base station and the target base station includes one of the following: and sending the message from the source base station to the target base station, and forwarding the X2 message of the source base station to the target base station through the core network or forwarding the X2 message of the source base station to the target base station through the control plane base station.

Optionally, the information carried by the X2 message includes one of the following: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an evolved EPS bearer of a core packet network; shunting the PDCP SN of the last uplink PDCP data SDU on the bearer or shunting the PDCP SN of the first uplink PDCP data SDU on the new bearer; the PDCP entity triggering the new bearer at the target base station may deliver the indication information of the uplink data to the S-GW in sequence.

Optionally, after the source base station determines that all uplink data on the offload bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that all uplink data on the offload bearer have been received and processed, or all uplink data on one or more offload bearers have been received and processed.

Fig. 6 is a flowchart of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention, where as shown in fig. 6, the flowchart includes the following steps:

s602, a PDCP entity carried by a UE in a shunting way forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating a source base station to determine that all uplink data carried by the shunting way are processed, and the PDCP control PDU carries a PDCP SN of the last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

s604, the UE transmits the PDCP control PDU to the source base station.

The methods described in fig. 5 and 6 are methods for uplink data, and a detailed flow for determining that uplink data has been processed for uplink data is as follows: and the upper layer of the UE generates the last uplink IP data packet sent by the shunting bearer, and the PDCP entity of the shunting bearer on the UE distributes PDCP SN for the last IP data packet to obtain the PDCP SN of the last uplink PDCP data PDU or the corresponding SDU. And the PDCP entity carried by the UE is shunted to form a PDCP control PDU which carries the PDCP SN of the last uplink PDCP data SDU. Meanwhile, the PDCP control PDU carries indication information indicating that the PDCP control PDU is a PDCP SN control PDU carrying the last uplink PDCP data SDU. And the UE sends the PDCP control PDU to the source base station through the shunt bearer. And the PDCP entity shunting the load on the source base station judges that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU through the indication information in the PDCP packet header. And the source base station acquires the PDCP SN of the last uplink PDCP data PDU through the PDCP control PDU. And when the source base station receives the last uplink PDCP data SDU and all uplink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SNs of the last uplink PDCP data SDU and delivers the uplink PDCP data SDUs to the S-GW in sequence, the source base station judges that all uplink data on the shunting load have been received and processed.

After the source base station determines that all uplink data on the offload bearer have been received and processed, the source base station notifies the target base station through an X2 message, and the PDCP entity of the new bearer corresponding to the offload bearer can begin to deliver the uplink data to the S-GW in sequence. The source base station may also indicate, through the X2 message, that the new bearer corresponding to the one or more offload bearers on the target base station may start to deliver uplink data to the S-GW in sequence after determining that the uplink data on the one or more offload bearers are received and processed. The X2 message may be sent directly from the source base station to the target base station, may be forwarded through the core network, or may be forwarded through the control plane base station. The X2 signaling may carry an identifier of a split bearer, an identifier of a new bearer, and/or an identifier of an EPS (Evolved Packet Core) bearer. The X2 message may also carry the PDCP SN of the last uplink PDCP data SDU on the breakout bearer or the PDCP SN of the first uplink PDCP data SDU on the new bearer. The X2 signaling may also carry indication information that triggers the PDCP entity of the new bearer at the target base station to deliver uplink data to the S-GW in sequence.

Fig. 7 is a flowchart of a method for determining a data processing status in bearer forwarding according to an embodiment of the present invention, where as shown in fig. 7, the flowchart includes the following steps:

s702, a control plane base station receives a notification message, wherein the notification message is used for notifying the control plane base station that uplink and/or downlink data of one or more offload bearers have been processed;

s704, the control plane base station determines that the processing of the uplink and/or downlink data of the one or more offload bearers is completed according to the notification message.

Optionally, the notification message is used for sending, by the source base station, to the control plane base station to notify the control plane base station when the source base station sends, to the UE or forwards, to the target base station, all downlink data packets from the S-GW before all the end identification packets: the source base station part on the offload bearer completes downlink data transmission, or the source base station part on the one or more offload bearers completes downlink data transmission.

Optionally, the notification message is used for sending, by the source base station, to the control plane base station to notify the control plane base station that all uplink data on the offload bearer has been received and processed by the source base station, to notify the control plane base station: all uplink data on the offload bearer has been received and processed, or all uplink data on the one or more offload bearers has been received and processed.

Optionally, the notification message is used for, when the source base station sends all downlink data packets from the serving gateway before the end identification packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the offload bearer has been received and processed, notifying, by the source base station, the control plane base station: the source base station part on the offload bearers completes downlink data transmission and all uplink data has been received and processed, or the source base station part on the one or more offload bearers completes downlink data transmission and all uplink data has been received and processed.

Optionally, the notification message includes: the notification message is an X2 message, and the transmission mode of the X2 message includes: the method comprises the steps that a source base station sends to a control plane base station, and an X2 message of the source base station is forwarded to the control plane base station through a core network; the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; the source base station of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the notification message includes: the notification message is an X2 message, and the transmission mode of the X2 message includes one of the following: the target base station sends the information to the control plane base station, and the X2 information of the target base station is forwarded to the control plane base station through the core network; the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; the target base station part of the shunting load completes the indication of downlink data transmission and/or the indication information of all uplink data received and processed.

Optionally, the notification message is used for sending, by the UE, to the control plane base station to notify the control plane base station when the UE determines that all downlink data on the offload bearer has been received and processed: all downlink data of the offload bearer has been received and processed, or all downlink data of the one or more offload bearers has been received and processed.

Optionally, after the control plane base station determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message, the control plane base station sends a source base station deletion message to the source base station, where the source base station deletion message includes an auxiliary base station Release message SeNB Release Request and/or a UE Context Release message Context Release.

The method and the alternative embodiment described in fig. 7 are directed to how to notify the control plane base station and how to trigger the offload bearer deletion, and a detailed solution is provided below for the above problem, first, how to notify the control plane base station by the source base station, there are three cases as follows:

in the case of the first source base station, after the source base station sends all downlink data packets from the S-GW before the end identifier packet to the UE or forwards the downlink data packets to the target base station, the source base station may notify the control plane base station through an X2 message, and the source base station part of the offload bearer completes downlink data sending. The source base station may notify the control plane base station through an X2 message after the source base station on the one or more offload bearers completes downlink data transmission, and the source base station on the one or more offload bearers completes downlink data transmission. When the source base station determines that all uplink data on the offload bearer have been received and processed, the source base station may notify the control plane base station through an X2 message, where all uplink data on the offload bearer have been received and processed. The source base station may notify the control plane base station through an X2 message after all uplink data on one or more offload bearers have been received and processed, where all uplink data on the one or more offload bearers have been received and processed.

In case of the second source base station, when the source base station sends all downlink data packets from the serving gateway before the end identifier packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the split bearer have been received and processed, the source base station may notify the control plane base station through an X2 message, where the split bearer completes downlink data sending on the part of the source base station, and all uplink data have been received and processed. The source base station may notify the control base station through an X2 message after the source base station on one or more offload bearers completes downlink data transmission and all uplink data has been received and processed, and the source base station on the one or more offload bearers completes downlink data transmission and all uplink data has been received and processed.

In the case of the source base station three, the X2 message may be directly sent from the source base station to the control plane base station, or may be forwarded through the core network. The X2 signaling may carry an identifier of a split bearer, an identifier of a new bearer, and/or an identifier of an EPS (Evolved Packet Core) bearer. The X2 signaling may also carry an indication that the source base station of the split bearer completes downlink data transmission and/or indication information that all uplink data have been received and processed.

The three situations of the source base station are as described above, and how the target base station notifies the control plane base station is as follows, and after the target base station receives the GTP tunnel termination identifier packet from the source base station, it indicates that the PDCP data PDU received before the termination identifier packet is the last PDCP data PDU sent by the source base station through the GTP tunnel. When the target base station finishes the sending of all the PDCP data PDUs before the identification packet, the target base station can report that the target base station part of the shunting load finishes the sending of the downlink data to the control plane base station through an X2 message. The target base station may notify the control plane base station through an X2 message after completing sending the PDCP data PDU on the one or more offload bearers, so that the target base station portion of the one or more offload bearers completes sending downlink data. The X2 message may be sent directly from the target base station to the control plane base station, or may be forwarded through the core network. The X2 signaling may carry an identification of the offload bearer, an identification of the new bearer, and/or an identification of the EPS bearer. The X2 signaling may also carry indication information that the target base station of the split bearer completes downlink data transmission.

The above is a description about the target base station, and the following describes the interaction between the UE side and the control plane base station, and when the UE determines that all downlink data on the offload bearer has been received and processed, the UE may notify the control plane base station through an RRC message, and all downlink data on the offload bearer has been received and processed. The UE may notify the control plane base station through an RRC message after all uplink data on one or more offload bearers have been received and processed, so that all downlink data on the one or more offload bearers have been received and processed.

The above describes how the source base station, the target base station and the UE interact with the control plane base station to process the information of uplink and downlink data completion, and after receiving the notification message, the control plane may execute the following methods:

after receiving the notification message, the control plane base station determines that the uplink and downlink data of one or more offload bearers have been sent, received, and processed, and may send an RRC connection reconfiguration message (rrcconnectionreconfiguration) to the UE to indicate release of the offload bearers. The control plane base station may further send an offload bearer release message to the source base station, including but not limited to a secondary base station Modification Request message (SeNB Modification Request), instructing the source base station to delete a user plane protocol stack offloaded and carried on the source base station and release offload bearer resources. The control plane base station may further send an offload bearer release message to the target base station, including but not limited to a secondary base station Modification Request message (SeNB Modification Request), instructing the target base station to delete a user plane protocol stack offloaded and carried on the target base station and release offload bearer resources. When the control plane base station receives the notification message from the source base station, the target base station and/or the UE, and determines that the uplink and downlink data of all the split bearers have been sent, received and processed, the control plane base station may send a source base station deletion message to the source base station, including but not limited to an auxiliary base station Release message (SeNB Release Request) and/or a UE Context Release message (UE Context Release).

In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 8 is a diagram of a new PDCP control PDU according to an alternative embodiment of the present invention, as shown in fig. 8, the new PDCP control PDU is used for notifying the PDCP SN of the last downlink PDCP data SDU of the UE from the source base station, or used for notifying the PDPC SN of the last uplink PDCP data SDU of the source base station from the UE. FIG. 8 shows a new PDCP control PDU including three cases when the PDCP SN lengths are 12, 15, and 18. Wherein, the PDU type field indicates that the PDCP control PDU is the PDCP control PDU containing the PDCP SN of the last uplink or downlink PDCP data SDU. Any one of 011 to 111 reserved in the existing protocol in the related art may be set as a PDU type field of the PDCP control PDU. And meanwhile, the LS field indicates the PDCP SN of the last uplink or downlink PDCP data SDU.

Fig. 9 is a detailed flow chart of uplink and downlink data processing according to an alternative embodiment of the present invention, and as shown in fig. 9, the flow chart of uplink and downlink data and signaling is described.

For downlink, for a certain EPS bearer, when the source base station receives the end flag packet from the S-GW:

s901, the source base station forms a PDCP control PDU which carries a PDCP SN of the last downlink PDCP data SDU.

S902, the source base station sends the PDCP control PDU to the UE. The PDCP control PDU may be directly transmitted to the UE by the source base station or may be transmitted to the UE by the target base station. If the offloading of the source base station to the target base station is also ended, the source base station may also send an end flag packet to the target base station.

And S903, when all downlink data of the source base station are sent or forwarded, stopping sending and forwarding the downlink data.

And S904, after the target base station receives the end identifier and finishes sending the downlink data on all the split bearers, stopping sending the downlink data of the split bearers.

S905. after the UE determines that the downlink data on the split bearer is received and processed, the UE triggers a new bearer to submit data to the upper layer.

S906, when the source base station judges that the source base station of the shunting load does not have trouble to finish sending and forwarding the downlink data, the source base station informs the control plane base station through an X2 message: the source base station part of the shunting load completes the sending and forwarding of the downlink data

S907, after the target base station determines that the target base station portion of the split bearer completes sending of the downlink data, the target base station notifies the control plane base station through an X2 message: the target base station part of the shunting load completes the sending of the downlink data

S908, when the UE determines that the downlink data on the offload bearer is received and processed, the UE notifies the control plane base station through an RRC message: and finishing the receiving and processing of the downlink data on the shunting bearer.

For uplink, after the upper layer of the UE stops delivering data to the offload bearer:

s911, UE composes PDCP control PDU, carrying PDCP SN of last ascending PDCP data SDU.

S912, the UE sends the PDCP control PDU to the source base station. The PDCP control PDU may be directly transmitted to the source base station by the UE, or may be transmitted to the target base station by the UE and then forwarded to the source base station by the target base station.

And S913, after all the uplink data on the shunting process of the UE are sent, stopping sending the uplink data on the shunting bearer.

S914, after the source base station determines that the uplink data on the offload bearer is received and processed, the source base station notifies the target base station through an X2 message: the PDCP entity of the new bearer may deliver data to the S-GW.

S915, after the source base station determines that the uplink data on the offload bearer is received and processed, the source base station notifies the control plane base station through an X2 message: and finishing receiving and processing the uplink data on the shunting bearer.

The control plane base station part is described as follows:

and S921, the control plane base station judges whether the transmission of the loaded uplink and downlink data is finished.

And S922, the control plane base station sends the RRC connection reconfiguration message to the UE, and releases the bearer of which the uplink and downlink data are sent completely.

S923, the UE replies an RRC connection reconfiguration completing message to the control plane base station.

S924, the control plane bs sends an SeNB modification request message to the source bs, and releases the bearer that the uplink and downlink data are sent completely.

And S925, the source base station replies a SeNB modification request response message to the control plane base station.

S926, the control plane base station sends an SeNB modification request message to the target base station, and releases the bearer whose uplink and downlink data are sent completely.

S927, the target base station replies a SeNB modification request response message to the control plane base station.

S928, the control plane base station determines whether all the uplink and downlink data of the split bearer are transmitted, received, and processed.

S929, when the control plane base station determines that the sending, receiving and processing of all the uplink and downlink data of the split bearer are completed, sends an SeNB release request or a UE context release request to the source base station.

Fig. 10 is a schematic diagram of a control plane base station processing uplink and downlink data according to a notification message, where as shown in fig. 10, the control plane base station determines that a offload bearer completes downlink data transmission according to an X2 message that a source base station of the offload bearer completes downlink data transmission and an X2 message that a target base station of the offload bearer completes downlink data transmission. And then, judging that the completion of downlink data transmission and uplink data reception and processing of the shunting bearer by the shunting bearer is finished through the X2 message that the completion of downlink data transmission and uplink data reception and processing of the shunting bearer by the shunting bearer is finished. At this time, the control plane base station cannot determine whether the UE has processed the downlink data and delivers the downlink data to the upper layer in sequence, and the control plane base station may initiate a bearer release procedure after time t, where the time t is related to the UE processing time. Or, the UE may be required to perform bearer release after all data are processed and sequentially delivered to the upper layer by an indication in the RRC signaling.

Fig. 11 is a schematic diagram of another control plane base station according to a notification message for processing uplink and downlink data, where as shown in fig. 11, the control plane base station determines that the uplink and downlink data of the split bearer are received and processed according to an X2 message that the uplink data of the split bearer is received and processed and a RRC message that the downlink data of the split bearer is received and processed, and the control plane base station may immediately initiate a bearer release procedure.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a device for determining a data processing state in bearer transfer is also provided, where the device is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 12 is a block diagram of a first apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 12, the apparatus is applied to a UE, and includes:

a first receiving module 122, configured to receive a packet data convergence protocol PDCP control protocol data unit PDU sent by a source base station, where the PDCP control PDU is composed of a PDCP entity that is shunted and carried by the source base station, and the PDCP control PDU carries a PDCP sequence number SN of a last downlink PDCP data service data unit SDU and indication information, where the indication information is used to indicate that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last downlink PDCP data SDU;

the first determining module 124 is connected to the first receiving module 122, and configured to determine that all downlink data on the split bearer is processed after the corresponding PDCP data SDU is delivered to the upper layer according to the PDCP control PDU.

Optionally, the first determining module 124 is further configured to determine, before it is determined that all downlink data on the offload bearer are processed, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last downlink PDCP data SDU according to the indication information; the first determining module 124 is further configured to obtain the PDCP SN of the last downlink PDCP data SDU via the PDCP control PDU, and deliver the received last downlink PDCP data SDU and all downlink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to the upper layer in sequence.

Optionally, the first determining module 124 is further configured to trigger the PDCP entity of the new bearer to deliver downlink data to the upper layer after determining that all downlink data on the offloaded bearer have been processed.

Optionally, the first determining module 124 is further configured to, after determining that all downlink data on the split bearer is processed, notify the control plane base station through a radio resource control RRC message that all downlink data on the split bearer has been processed or that downlink data on one or more of the split bearers has been processed.

Fig. 13 is a block diagram of a second apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 13, the apparatus is applied to a source base station, and includes:

a first forming module 132, configured to form a PDCP control PDU by a PDCP entity of a offload bearer on a source base station, where the PDCP control PDU is used to instruct a UE to determine that all downlink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last downlink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

a first sending module 134, connected to the first composing module 132, for sending the PDCP control PDU to the UE.

Fig. 14 is a block diagram of a third configuration of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 14, the device includes:

a first notifying module 142, connected before the first composing module 132, configured to notify the control plane base station through an X2 message that the source base station portion of the split bearer completes downlink data transmission or one or more source base station portions of the split bearer complete downlink data transmission after the source base station transmits all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station.

Fig. 15 is a block diagram of a fourth apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 15, the apparatus includes:

a second notifying module 152, connected before the first composing module 132, configured to notify the control plane base station through an X2 message that the source base station portion of the split bearer completes downlink data transmission and all uplink data have been processed, or that the source base station portion of one or more split bearers completes downlink data transmission and all uplink data have been received and processed, after the source base station transmits all downlink data packets from the S-GW before the end identification packet to the UE or forwards all downlink data packets to the target base station and determines that all uplink data on the split bearer have been received and processed.

Fig. 16 is a block diagram of a fifth configuration of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 16, the device is applied to a source base station, and includes:

a second receiving module 162, configured to receive a PDCP control PDU sent by the UE, where the PDCP control PDU is composed of a PDCP entity that is offloaded and carried on the UE, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

a second determining module 164, connected to the second receiving module 162, configured to determine that all uplink data on the split bearer are received and processed after delivering the corresponding PDCP data SDU to the S-GW according to the PDCP control PDU.

Optionally, the second determining module 164 is further configured to determine, before determining that all uplink data on the offload bearer are received and processed, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last uplink PDCP data SDU according to the indication information; the second determining module 164 is further configured to obtain the PDCP SN of the last uplink PDCP data SDU via the PDCP control PDU, and the source base station delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

Optionally, the second determining module 164 is further configured to notify the target base station through an X2 message after the source base station determines that all uplink data on the offloaded bearer are received and processed, so that the PDCP entity of the new bearer corresponding to the offloaded bearer may start to deliver uplink data to the S-GW in sequence.

Optionally, the second determining module 164 is further configured to, after the source base station determines that the uplink data reception and processing on one or more of the split bearers are completed, indicate, through an X2 message, that a new bearer corresponding to the one or more split bearers on the target base station may start to deliver uplink data to the S-GW in sequence.

Optionally, the second determining module 164 is further configured to notify the control plane base station through an X2 message that all uplink data on the offload bearer have been received and processed or all uplink data on one or more offload bearers have been received and processed after the source base station determines that all uplink data on the offload bearer have been received and processed.

Fig. 17 is a block diagram of a sixth configuration of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 17, the device is applied to a UE, and the device includes:

a second forming module 172, configured to form a PDCP control PDU by a PDCP entity of a offload bearer on the UE, where the PDCP control PDU is used to instruct the source base station to determine that all uplink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

a second sending module 174, connected to the second forming module 172, is configured to send the PDCP control PDU to the source base station.

Fig. 18 is a block diagram of a seventh configuration of an apparatus for determining a data processing state in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 18, the apparatus is applied to a control plane base station, and the apparatus includes:

a third receiving module 182, configured to receive a notification message, where the notification message is used to notify the control plane base station that uplink and/or downlink data of one or more offload bearers have been processed;

a third determining module 184, connected to the third receiving module 182, configured to determine that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message.

Optionally, the notification message includes: the notification message is an X2 message, and the transmission mode of the X2 message includes: the method comprises the steps that a source base station sends to a control plane base station, and an X2 message of the source base station is forwarded to the control plane base station through a core network;

the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; the source base station of the shunting load completes the indication of sending the downlink data and/or the indication information of receiving and processing all the uplink data.

Optionally, the notification message includes: the notification message is an X2 message, and the transmission mode of the X2 message includes one of the following: the target base station sends the information to the control plane base station, and the X2 information of the target base station is forwarded to the control plane base station through the core network;

the X2 message carries one of the following information: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an EPS bearer; the target base station part of the shunting load completes the indication of downlink data transmission and/or the indication information of all uplink data received and processed.

Fig. 19 is a block diagram of an eighth configuration apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 19, the apparatus includes:

a first indicating module 192, connected to the third determining module 184, configured to send an RRC connection release reconfiguration message for indicating offloading of bearers to the UE.

Fig. 20 is a block diagram of a configuration of a device for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 20, the device includes:

a second indicating module 202, connected to the third determining module 184, configured to send an offload bearer release message to the source base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message is used to instruct the source base station to delete a user plane protocol stack offloaded and borne on the source base station and release offload bearer resources.

Fig. 21 is a block diagram illustrating a structure of an apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 21, the apparatus includes:

a third indicating module 212, connected to the third determining module 184, configured to send a offload bearer release message to the target base station, where the offload bearer release message includes an auxiliary base station Modification Request message SeNB Modification Request, and the offload bearer release message indicates the target base station to delete a user plane protocol stack offloaded and carried on the target base station and release offload bearer resources.

Fig. 22 is a block diagram of an eleventh configuration of an apparatus for determining a data processing status in bearer forwarding according to an embodiment of the present invention, and as shown in fig. 22, the apparatus includes:

a fourth indicating module 222, connected to the third determining module 184, is configured to send a source base station delete message to the source base station, where the source base station delete message includes an auxiliary base station Release message SeNB Release Request and/or a UE Context Release message Context Release.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

Example 3

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, a user equipment UE receives a packet data convergence protocol PDCP control protocol data unit PDU sent by a source base station, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the source base station, and carries a PDCP sequence number SN of a last downlink PDCP data service data unit SDU and indication information, wherein the indication information is used for indicating that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

s2, after the UE delivers the corresponding PDCP data SDU to the upper layer according to the PDCP control PDU, the UE determines that all downlink data on the offload bearer have been processed. .

s3, the PDCP entity of the shunting bearer on the source base station forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating the UE to determine that all downlink data on the shunting bearer have been processed, the PDCP control PDU carries the PDCP SN of the last downlink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

s4, the source base station sends the PDCP control PDU to the UE.

s5, a source base station receives a PDCP control PDU sent by a UE, wherein the PDCP control PDU is composed of a PDCP entity carried by a shunt on the UE, and carries a PDCP SN of a last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

and S6, after the source base station delivers the corresponding PDCP data SDU to the service network management S-GW according to the PDCP control PDU, the source base station determines that all uplink data on the shunting bearer are received and processed.

s7, the PDCP entity of the shunt bearer on the UE forms a PDCP control PDU, wherein the PDCP control PDU is used for indicating the source base station to determine that all uplink data on the shunt bearer have been processed, the PDCP control PDU carries the PDCP SN of the last uplink PDCP data SDU and indication information, wherein the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

s8, the UE sends the PDCP control PDU to the source base station.

s9, the control plane base station receives a notification message, where the notification message is used to notify the control plane base station that the processing of uplink and/or downlink data of one or more offload bearers has been completed;

s10, the control plane bs determines that the uplink and/or downlink data of the one or more offload bearers has been processed according to the notification message.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor executes the method steps of the above embodiments according to the program code stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a data processing state in bearer forwarding, comprising:

2. The method of claim 1, wherein before the UE determines that the downlink data on the offload bearer is completely processed, the method further comprises:

the UE determines that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last downlink PDCP data SDU according to the indication information;

and the UE acquires the PDCP SN of the last downlink PDCP data SDU through the PDCP control PDU, and delivers the received last downlink PDCP data SDU and all downlink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to an upper layer in sequence.

3. The method of claim 1, wherein after the UE determines that all downlink data on the offloaded bearer have been processed, the UE triggers a PDCP entity of a new bearer to deliver downlink data to an upper layer.

4. The method of claim 1, wherein after the UE determines that all downlink data on the split bearer has been processed, the UE notifies a control plane base station through a Radio Resource Control (RRC) message that all downlink data on the split bearer has been processed or that downlink data on one or more of the split bearers has been processed.

5. A method for determining a data processing state in bearer forwarding, comprising:

the source base station transmits the PDCP control PDU to the UE.

6. The method of claim 5, further comprising:

when the source base station sends all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station, the source base station notifies the control plane base station through an X2 message that the source base station portion of the offload bearer completes downlink data transmission or that one or more source base station portions of the offload bearer complete downlink data transmission.

7. The method of claim 5, further comprising:

when the source base station sends all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station, and determines that all uplink data on the split bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that the source base station portion of the split bearer completes downlink data sending and all uplink data have been processed, or the source base station portion on one or more split bearers completes downlink data sending and all uplink data have been received and processed.

8. A method for determining a data processing state in bearer forwarding, comprising:

9. The method of claim 8, wherein before the source base station determines that all uplink data on the split bearer have been received and processed, the method further comprises:

the source base station determines that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last uplink PDCP data SDU according to the indication information;

and the source base station acquires the PDCP SN of the last uplink PDCP data SDU through the PDCP control PDU, and delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs of which the PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

10. The method of claim 8, wherein after the source base station determines that all uplink data on the offloaded bearer have been received and processed, the source base station notifies a target base station through an X2 message, and a PDCP entity of a new bearer corresponding to the offloaded bearer can start to deliver uplink data to the S-GW in sequence.

11. The method of claim 8, further comprising: after the source base station determines that the uplink data on one or more of the split bearers is received and processed, the source base station indicates, through an X2 message, that a new bearer corresponding to the one or more split bearers on the target base station may start to deliver uplink data to the S-GW in sequence.

12. The method according to claim 10 or 11, wherein the transmission mode of the X2 message between the source base station and the target base station comprises one of the following: sending the message from the source base station to the target base station, and forwarding the X2 message of the source base station to the target base station through a core network, or forwarding the X2 message of the source base station to the target base station through a control plane base station.

13. The method according to claim 10 or 11, wherein the information carried by the X2 message comprises one of: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an evolved EPS bearer of a core packet network; shunting the PDCP SN of the last uplink PDCP data SDU on the bearer or shunting the PDCP SN of the first uplink PDCP data SDU on the new bearer; the PDCP entity triggering the new bearer at the target base station may deliver the indication information of the uplink data to the S-GW in sequence.

14. The method of claim 8, further comprising:

when the source base station determines that all uplink data on the split bearer have been received and processed, the source base station notifies the control plane base station through an X2 message that all uplink data on the split bearer have been received and processed, or all uplink data on one or more split bearers have been received and processed.

15. A method for determining a data processing state in bearer forwarding, comprising:

the UE transmits the PDCP control PDU to the source base station.

16. A device for determining a data processing state in bearer transfer, applied to a User Equipment (UE), comprises:

a first receiving module, configured to receive a packet data convergence protocol PDCP control protocol data unit PDU sent by a source base station, where the PDCP control PDU is composed of a PDCP entity that is shunted and carried by the source base station, and the PDCP control PDU carries a PDCP sequence number SN of a last downlink PDCP data service data unit SDU and indication information, where the indication information is used to indicate that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of the last downlink PDCP data SDU;

and the first determining module is connected with the first receiving module and used for determining that all downlink data on the shunting bearer are processed completely after the corresponding PDCP data SDU is submitted to an upper layer according to the PDCP control PDU.

17. The apparatus of claim 16, wherein the first determining module is further configured to determine, according to the indication information, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last downlink PDCP data SDU before determining that all downlink data on a offload bearer have been processed;

the first determining module is further configured to obtain a PDCP SN of a last downlink PDCP data SDU through the PDCP control PDU, and deliver the received last downlink PDCP data SDU and all downlink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last downlink PDCP data SDU to an upper layer in sequence.

18. The apparatus of claim 16, wherein the first determining module is further configured to trigger the PDCP entity of the new bearer to deliver downlink data to the upper layer after determining that all downlink data on the offloaded bearer have been processed.

19. The apparatus of claim 16, wherein the first determining module is further configured to notify the control plane base station through a Radio Resource Control (RRC) message that all downlink data on the split bearer has been processed or downlink data on one or more split bearers has been processed after determining that all downlink data on the split bearer has been processed.

20. An apparatus for determining a data processing status in bearer forwarding, applied to a source base station, the apparatus comprising:

a first forming module, configured to form a PDCP control PDU by a PDCP entity of a offload bearer in a source base station, where the PDCP control PDU is used to instruct a UE to determine that all downlink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last downlink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU carrying the PDCP SN of the last downlink PDCP data SDU;

a first sending module, connected to the first forming module, for sending the PDCP control PDU to the UE.

21. The apparatus of claim 20, further comprising:

a first notification module, connected before the first component module, configured to notify the control plane base station, through an X2 message, that the source base station portion of the split bearer completes downlink data transmission or that one or more source base station portions of the split bearer complete downlink data transmission after the source base station transmits all downlink data packets from the S-GW before the end identification packet to the UE or forwards the downlink data packets to the target base station.

22. The apparatus of claim 20, further comprising:

a second notification module, connected to the front of the first component module, configured to notify the control plane base station, through an X2 message, that the source base station portion of the split bearer completes downlink data transmission and all uplink data have been processed, or that the source base station portion of one or more split bearers completes downlink data transmission and all uplink data have been received and processed, after the source base station transmits all downlink data packets from the S-GW and before the end identification packet to the UE or forwards all downlink data packets to the target base station, and it is determined that all uplink data on the split bearer have been received and processed.

23. A device for determining a data processing state in bearer transfer, applied to a source base station, includes:

a second receiving module, configured to receive a PDCP control PDU sent by a UE, where the PDCP control PDU is composed of a PDCP entity that is offloaded and carried on the UE, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is the PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

and the second determining module is connected with the second receiving module and used for determining that all uplink data on the shunting bearer are received and processed completely after the corresponding PDCP data SDU is submitted to the S-GW according to the PDCP control PDU.

24. The apparatus of claim 23, wherein the second determining module is further configured to determine, according to the indication information, that the PDCP control PDU is a PDCP control PDU carrying a PDCP SN of a last uplink PDCP data SDU before determining that all uplink data on the offloaded bearer have been received and processed;

the second determining module is further configured to obtain a PDCP SN of a last uplink PDCP data SDU through the PDCP control PDU, and the source base station delivers the received last uplink PDCP data SDU and all uplink PDCP data SDUs whose PDCP SNs are smaller than the PDCP SN of the last uplink PDCP data SDU to the S-GW in sequence.

25. The apparatus of claim 23, wherein the second determining module is further configured to notify a target base station through an X2 message after the source base station determines that all uplink data on the offloaded bearer are received and processed, and wherein the PDCP entity of the new bearer corresponding to the offloaded bearer can start to deliver uplink data to the S-GW in sequence.

26. The apparatus of claim 23, further comprising: the second determining module is further configured to indicate, through an X2 message, that a new bearer corresponding to the one or more offload bearers on the target base station may start to deliver uplink data to the S-GW in sequence after the source base station determines that reception and processing of uplink data on the one or more offload bearers are completed.

27. The apparatus according to claim 25 or 26, wherein the transmission of the X2 message between the source base station and the target base station comprises one of: sending the message from the source base station to the target base station, and forwarding the X2 message of the source base station to the target base station through a core network, or forwarding the X2 message of the source base station to the target base station through a control plane base station.

28. The apparatus according to claim 25 or 26, wherein the information carried by the X2 message comprises one of: an identifier of a shunting bearer, an identifier of a new bearer and/or an identifier of an evolved EPS bearer of a core packet network; shunting the PDCP SN of the last uplink PDCP data SDU on the bearer or shunting the PDCP SN of the first uplink PDCP data SDU on the new bearer; the PDCP entity triggering the new bearer at the target base station may deliver the indication information of the uplink data to the S-GW in sequence.

29. The apparatus of claim 23, wherein the second determining module is further configured to notify a control plane base station through an X2 message that all uplink data on the offload bearer has been received and processed or all uplink data on one or more of the offload bearers has been received and processed after the source base station determines that all uplink data on the offload bearer has been received and processed.

30. An apparatus for determining a data processing status in bearer transfer, applied to a UE, the apparatus comprising:

a second forming module, configured to form a PDCP control PDU by a PDCP entity of a offload bearer on a UE, where the PDCP control PDU is used to instruct a source base station to determine that all uplink data on the offload bearer have been processed, and the PDCP control PDU carries a PDCP SN of a last uplink PDCP data SDU and indication information, where the indication information indicates that the PDCP control PDU is a PDCP control PDU carrying the PDCP SN of the last uplink PDCP data SDU;

and the second sending module is connected with the second composition module and used for sending the PDCP control PDU to the source base station.