WO2014000687A1 - Method, system, and device for transmitting data during access point switching process - Google Patents

Abstract

A method, system, and device for transmitting data during an access point switching process, for use in solving the problem found in the prior art that the latency of an interruption to a data side is increased during the access point switching in a heterogeneous network. The method of embodiments of the present invention comprises: a user equipment determines that a reconfiguration of all or some DRB from a source cell to a target cell is needed while an RRC connection is kept unchanged; and, during the access point switching process of the data side, the user equipment transmits data via a data radio bearer of a source cell, where the data radio bearer of the source cell is the last data radio bearer used before the access point switching of the data side. Because the user equipment transmits the data via the data radio bearer of the source cell during the access point switching process, the latency of the interruption to the data side during the access point switching in the heterogeneous network is reduced; this further increases switching efficiency and reduces data transmission time.

Description

 Method, system and device for transmitting data during access point switching process. The application claims to be submitted to the Chinese Patent Office on June 28, 2012, the application number is 201210224338.6, and the invention name is an access point switching process. The priority of the Chinese patent application of the methods, systems and devices, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of wireless communications, and in particular, to a method, system, and device for transmitting data during an access point handover process. Background technique

 With the deployment of home base stations, micro cells, etc., the traditional homogeneous network of only macro cells will gradually evolve into a heterogeneous network (hetnet) in which multiple types of cells coexist. In the case of heterogeneous networks, mobility-related performance (such as handover, RLF (Radio Link Failure), etc.) needs to be further improved. In order to improve mobility, it is necessary to introduce a new architecture, namely, control plane and user plane. Separation technology.

 In the X2 handover process, the source eNB (evolved base station) decides to perform an X2 handover operation according to the measurement result, and the source eNB sends a handover request message to the target eNB; the target eNB configures a new bearer according to the parameters, and if the configuration is successful, the target eNB will Returning the handover response message; the source eNB sends an RRC (Radio Resource Control) reconfiguration message to the UE (User Equipment), and the source eNB stops receiving and transmitting data and the control plane; after receiving the message, the UE receives the message Stop receiving and transmitting data and control planes of the source eNB, and perform uplink and downlink synchronization operations to the target eNB. Once the uplink synchronization is completed, the UE will start to enable the new security key and start applying the new PDCP (Packet Data Convergence Protocol). / Packet Data Aggregation Protocol / RLC (Radio Link Control) / MAC (Medium Access Control, Media Access Control) entity for receiving and transmitting data and control planes. The UE first sends RRC reconfiguration. Complete message; after receiving the message, the target eNB returns an ACK of the RLC (although ) Message, and starts downlink data transmission; the UE after receiving the RRC reconfiguration complete message to the ACK, the uplink transmission start data plane.

In the existing heterogeneous network, as shown in FIG. 1A, a macro cell provides a basic coverage, and works in an existing LTE (Long Term Evolution) cellular frequency band, and a Local cell provides a hotspot. Coverage, can work in the frequency band above 3GHz, and the high-speed link (wired/wireless) is connected between the Local Cell and the Macro Cell. When the UE moves within the coverage of the Macro cell, the switch between the Macro cell and the Local cell may be continuously executed. operating. When the UE moves within the coverage of the Macro cell, the switching operation between the Macro cell and the Local cell may be continuously performed. According to the switching feature between the existing X2 interfaces, the RRC connection reconfiguration message is sent to the UE, and the source e B will terminate the transmission and reception of all bearers, and only after the UE completes the uplink and downlink synchronization to the target eNB, and completes the transmission and confirmation of the RRC reconfiguration complete message, the application of the new bearer configuration for data and control plane transmission is started. Receive, thereby increasing the interrupt latency of the data plane.

 In summary, in the case of a heterogeneous network, the interruption of the data plane is increased when the access point is switched. Summary of the invention

 A method, a system, and a device for transmitting data in an access point switching process provided by the embodiments of the present invention are used to solve the problem that the data plane is increased when the access point is switched in the heterogeneous network in the prior art. The problem of interrupting the delay.

 A method for transmitting data in an access point switching process provided by an embodiment of the present invention includes:

 The user equipment determines that all or part of the data radio bearer DRB needs to be reconfigured from the source cell to the target cell if the RRC connection is unchanged;

 During the access point switching process of the data plane, the user equipment transmits data by using a data radio bearer with the source cell, where the data radio bearer with the source cell is used last before the data point access point is switched. Data radio bearer.

 Another method for transmitting data in an access point switching process provided by the embodiment of the present invention includes:

 The macro base station determines that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell if the radio resource control RRC connection is unchanged;

 The macro base station sends an RRC connection reconfiguration message to the user equipment, to notify the user equipment to perform a data plane switching access point, and transmit the data radio bearer with the source cell during the access point handover process. Data; wherein, the data radio bearer with the source cell is the last used data radio bearer before the access point switching of the data plane.

 A user equipment provided by the embodiment of the present invention includes:

 a first processing module, configured to determine that all or part of the data radio bearer DRB needs to be reconfigured from the source cell to the target cell if the RRC connection is unchanged;

 The transmission module is configured to transmit data through the original data radio bearer during the access point handover process, where the original data radio bearer is the last data radio bearer used before the data plane access point handover.

 A base station provided by an embodiment of the present invention includes:

a second processing module, configured to determine that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell if the radio resource control RRC connection is unchanged; a notification module, configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to perform handover of the access point, and transmit data through the original data radio bearer during the access point handover process;

 The original data radio bearer is the last data radio bearer used before the access point of the data plane is switched.

 A system provided by an embodiment of the present invention includes:

 The macro base station is configured to determine that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell, and send an RRC connection reconfiguration message to the user equipment, if the radio resource control RRC connection is unchanged. And the user equipment is notified to perform the handover of the access point, and the data is transmitted through the original data radio bearer during the access point handover process;

 The user equipment is configured to determine that, after the radio resource control RRC connection is unchanged, all or part of the data radio bearer DRB is reconfigured from the source cell to the target cell, and then, in the process of performing the access point switching, The data radio bearers transmit data, wherein the original data radio bearer is the last data radio bearer used before the access point switching of the data plane.

 A user equipment provided by another embodiment of the present invention includes:

 a processor, configured to determine that all or part of the DRB needs to be reconfigured from the source cell to the target cell if the RRC connection is unchanged;

 The transceiver is configured to transmit data by using a data radio bearer with the source cell during the access point switching of the data plane, where the data radio bearer with the source cell is used before the data plane access point switching The data is wirelessly carried.

 A base station provided by another embodiment of the present invention includes:

 a processor, configured to determine that the user equipment needs to reconfigure all or part of the DRB from the source cell to the target cell if the RRC connection is unchanged;

 a transceiver, configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to perform a data plane switching access point, and perform data radio bearer with the source cell in performing the access point handover process Transmitting data; wherein, the data radio bearer with the source cell is the last data radio bearer used before the access point switching of the data plane.

The user equipment transmits data through the original data radio bearer during the access point switching process, thereby reducing the data plane interruption delay when the access point is switched in the heterogeneous network; further improving the handover Efficiency, reducing data transfer time. DRAWINGS Figure 1A shows E-UTRAN (Evolved Universal Terrestrial Radio Access) with Local e B

Network, evolved universal terrestrial wireless network) network architecture diagram;

 1B is a schematic diagram of a network architecture in which a control plane is separated from a user plane according to an embodiment of the present invention;

 2 is a schematic structural diagram of a system for transmitting data during an access point switching process according to an embodiment of the present invention;

 3 is a schematic structural diagram of user equipment in a system for transmitting data during an access point handover according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a macro base station in a system for transmitting data during an access point handover according to an embodiment of the present invention; FIG. 6 is a schematic flowchart of a method for a user equipment to transmit data during an access point handover process according to an embodiment of the present invention; FIG. 6 is a schematic flowchart of a method for a macro base station to notify a user equipment to transmit data during an access point handover process according to an embodiment of the present disclosure;

 FIG. 7 is a second schematic structural diagram of a user equipment according to an embodiment of the present disclosure;

 FIG. 8 is a second schematic structural diagram of a base station according to an embodiment of the present invention. detailed description

 In the embodiment of the present invention, the user equipment determines that all or part of the DRB (Data Radio Bearer) is reconfigured from one cell to another after the RRC connection is unchanged, and the access point is performed. During the handover process, data is transmitted through the original data radio bearer, where the original data radio bearer is the last data radio bearer used before the access point switching of the data plane. Since the user equipment transmits data through the original data radio bearer during the access point switching process, the data plane interruption delay when the access point is switched in the heterogeneous network is reduced.

 The solution of the embodiment of the present invention is applied in an environment where the control plane is separated from the user plane. As shown in FIG. 1B, in the network architecture in which the control plane is separated from the user plane, the SRB (Signaling Radio Bearer) of the UE remains on the Macro e B, and the RLC/MAC of all the DRBs is maintained. /PHY (physical layer) remains on Local e B.

 In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

 As shown in FIG. 2, the system for transmitting data during the access point switching process provided by the embodiment of the present invention includes: a macro base station 10 and a user equipment 20.

The macro base station 10 is configured to determine that the user equipment needs to reconfigure all or part of the DRB from one cell to another after the RRC connection is unchanged, and send a message to the user equipment to notify the user equipment to access. Point cut And the data is transmitted through the original data radio bearer during the access point switching process, where the original data radio bearer refers to the data radio bearer of the user equipment and the source cell;

 The user equipment 20 is configured to determine, according to the received notification from the macro base station 10, that after all or part of the DRBs are reconfigured from one cell to another in the case that the RRC connection is unchanged, the access point is switched. In the process, data is transmitted through the original data radio bearer, where the original data radio bearer is the last data radio bearer used before the access point switching of the data plane.

 Preferably, the message sent by the macro base station 10 to the user equipment is an RRC connection reconfiguration message. Correspondingly, the user equipment 20 determines that the RRC connection needs to be unchanged according to the received parameters in the RRC connection reconfiguration message from the source cell. In case, all or part of the DRBs are reconfigured from one cell to another, that is, a new data radio bearer is configured on the other cell.

 In implementation, user equipment 20 is a user equipment connected to macro base station 10. When the macro base station 10 finds that the user equipment 20 gradually approaches or leaves the coverage area of the Local e B, it is determined that the access point switching of the data plane will be performed (ie, it is determined that all or part of the DRBs need to be removed from the RRC connection. The cell is reconfigured to another cell).

 Preferably, the user equipment 20 determines that all or part of the DRB needs to be reconfigured from one cell to another after the RRC connection is unchanged, and a new data radio bearer is configured. The new data radio bearer is Refers to the data radio bearer of the user equipment and the target cell. Further, the user equipment 20 can keep the old data radio bearer for a period of time to reduce the interruption time of the data transmission. The length of the period of time can be preset or implicitly determined according to the signaling message.

 Specifically, the user equipment 20 keeps the PDCP entity unchanged according to the relevant parameters in the RRC message, and configures a new RLC/MAC/PHY entity and a mapping relationship between the entities.

 There are various situations in the access point switching process according to the source cell and the target cell, which are respectively introduced below.

 Case 1: The source cell in the process of access point handover belongs to the macro base station 10, and the target cell belongs to the local base station (the local base station may also be referred to as a small cell base station).

 Specifically, in the process of the access point switching, after configuring the new data radio bearer, the user equipment 20 performs downlink synchronization operation on the target cell while transmitting data through the original data radio bearer, for example, in the designated RACH ( The random access channel (random access channel) transmits a proprietary Preamble (pilot) code to the target cell.

 In the implementation, if the uplink is configured in the RRC reconfiguration process, the user equipment 20 performs uplink synchronization operations on the target cell while transmitting data through the original data radio bearer, for example, according to information such as the uplink time advance amount returned by the network side. Uplink synchronization.

The user equipment 20 transmits data through the original data radio bearer during the access point handover process. After receiving the Rach Response (random access channel response) message from the target cell, an RRC reconfiguration complete message is generated, and an RRC reconfiguration complete message is sent to the macro base station, and then the user equipment 20 starts transmitting data on the new DRB.

 In the implementation, the user equipment 20 has multiple processing modes for the original data radio bearer.

 After the HARQ (Hybrid Automatic Repeat ReQuest) ACK feedback or the RLC ACK feedback of the RRC Complete message is received, the user equipment 20 transmits data through the new data radio bearer and stops the original data. The wireless bearer transmits data; after receiving the data through the new data radio bearer, the original data radio bearer is deleted, or the original data radio bearer is deleted after a set duration;

 Correspondingly, after receiving the RRC reconfiguration complete message from the user equipment 20, the macro base station 10 sends an ACK feedback of the RLC layer to the user equipment 20, and stops transmitting data through the original data radio bearer and passes the new in the target cell. After the data radio bearer transmits data, the original data radio bearer is deleted or the data is transmitted through the original data radio bearer, and the original data radio bearer is deleted after the set time period, and the target cell is notified to transmit through the new data radio bearer. data.

 In the implementation, the set duration can be set according to needs, experience values or simulations.

 For processing mode 1, after the user equipment 20 transmits data on the new DRB and stops before the original data radio bearer transmits data, the user equipment 20 simultaneously on the new and original two data radio bearers. transfer data.

 After the user equipment 20 transmits data on the new DRB, the network side stops transmitting data on the new and original two data radio bearers during the period before the original data radio bearer transmits data. .

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment 20 deletes the original data radio bearer.

 Specifically, after transmitting the RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment 20 starts to delete the original data radio bearer while transmitting data on the new DRB.

 Correspondingly, after receiving the RRC reconfiguration complete message from the user equipment, the macro base station 10 sends the ACK feedback of the RLC layer to the user equipment 20, and deletes the original data radio bearer.

 Case 2: The source cell in the access point handover process belongs to the local base station, and the target cell belongs to the local base station.

 Specifically, in the process of the access point handover, after configuring the new data radio bearer, the user equipment 20 generates an RRC reconfiguration complete message, and sends an RRC reconfiguration complete message to the macro base station, and then the user equipment 20 starts the new DRB. Transfer data on.

 In the implementation, the user equipment 20 has multiple processing modes for the original data radio bearer.

After the user equipment 20 receives the HARQ ACK feedback or the RLC ACK feedback of the RRC completion message, The data is transmitted through the new data radio bearer, and the data is stopped at the original data radio bearer; then, after the data is received through the new data radio bearer, the original data radio bearer is deleted, or the original data is deleted after the set duration Radio bearer

 Correspondingly, after transmitting the RRC connection reconfiguration message, the macro base station 10 transmits data through the new data radio bearer, and simultaneously notifies the source cell to stop transmitting data through the original data radio bearer and after the target cell transmits data through the new data radio bearer. The original data radio bearer is deleted or the source cell is notified to stop transmitting data through the original data radio bearer, and the original data radio bearer is deleted after the set time period, and the target cell is notified to transmit data through the new data radio bearer.

 In the implementation, the set duration can be set according to needs, experience values or simulations.

 For processing mode 1, after the user equipment 20 transmits data on the new DRB and stops before the original data radio bearer transmits data, the user equipment 20 simultaneously on the new and original two data radio bearers. transfer data.

 The macro base station 10 transmits the data on the new data carrier before the user equipment 20 transmits the data on the new DRB, and the macro base station 10 transmits the data on the new and original data radio carriers simultaneously. data.

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment 20 deletes the original data radio bearer.

 Specifically, after transmitting the RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment 20 starts to delete the original data radio bearer while transmitting data on the new DRB.

 Correspondingly, after transmitting the RRC connection reconfiguration message, the macro base station 10 transmits data through the new data radio bearer, and simultaneously notifies the source cell to delete the original data radio bearer.

 Case 3: The source cell in the process of the access point handover belongs to the local base station, and the target cell belongs to the macro base station.

 After receiving the HARQ ACK feedback or the RLC ACK feedback of the RRC completion message, the user equipment 20 transmits data through the new data radio bearer, and stops transmitting data in the original data radio bearer; and then receives the data through the new data radio bearer. The original data radio bearer is deleted, or the original data radio bearer is deleted after a set duration; correspondingly, the macro base station 10 sends the RRC reconfiguration complete message from the user equipment 20 to the user equipment.

The ACK feedback of the RLC layer notifies the source cell to stop transmitting data through the original data radio bearer and delete the original data radio bearer after the target cell transmits data through the new data radio bearer or notify the source cell to stop passing the original data. The radio bearers transmit data and deletes the original data radio bearer after a set period of time, and transmits the data through the new data radio bearer.

 In the implementation, the set duration can be set according to needs, experience values or simulations.

For processing mode 1, the user equipment 20 stops transmitting data in the original data after transmitting data on the new DRB. During the time before the transmission of the data, the user equipment 20 simultaneously transmits data on the new and original two data radio bearers.

 After the user equipment 20 transmits data on the new DRB, the network side stops transmitting data on the new and original two data radio bearers during the period before the original data radio bearer transmits data. .

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment 20 deletes the original data radio bearer.

 Specifically, after transmitting the RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment 20 starts to delete the original data radio bearer while transmitting data on the new DRB.

 Correspondingly, after receiving the RRC reconfiguration complete message from the user equipment, the macro base station 10 sends an ACK feedback of the RLC layer to the user equipment 20, and notifies the source cell to delete the original data radio bearer.

 As shown in FIG. 3, the user equipment in the system for transmitting data during the access point switching process provided by the embodiment of the present invention includes: a first processing module 300 and a transmission module 310.

 The first processing module 300 is configured to determine that all or part of the DRB needs to be reconfigured from one cell to another when the RRC connection is unchanged;

 The transmitting module 310 is configured to transmit data through the original data radio bearer during the access point switching process, where the original data radio bearer is the last used data radio bearer before the access point of the data plane is switched.

 Preferably, the first processing module 300 determines, according to the received parameters in the RRC connection reconfiguration message from the source cell, that all or part of the DRBs need to be reconfigured from one cell to another if the RRC connection is unchanged. On the cell.

 Preferably, the first processing module 300 determines that a new data radio bearer needs to be configured after all or part of the DRBs are reconfigured from one cell to another in the case that the RRC connection is unchanged.

 Preferably, the first processing module 300 deletes the original data radio bearer after sending the RRC reconfiguration complete message to the source cell in the access point handover process, or sends the RRC weight to the source cell in the access point handover process. After the configuration completion message is received, and the data is received by the new data radio bearer, the original data radio bearer is deleted; or after the RRC reconfiguration complete message is sent to the source cell in the access point handover process, the original length is deleted after the set time The data is wirelessly carried.

 Preferably, the target cell in the process of the access point handover belongs to the local base station; the first processing module 300 performs downlink synchronization operation on the target cell while transmitting data through the original data radio bearer.

 Preferably, if the uplink is configured in the RRC reconfiguration process, the first processing module 300 performs uplink synchronization operation on the target cell while transmitting data through the original data wireless carrier.

Preferably, the first processing module 300 generates and sends an RRC reconfiguration complete message after receiving the Rach Response message from the target cell while transmitting data through the original data radio bearer. Preferably, the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the local base station; the first processing module 300 passes the new data radio bearer after receiving the HARQ ACK feedback or the RLC ACK feedback of the RRC completion message. Transmit data while stopping the transmission of data on the original data radio bearer.

 Preferably, the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the macro base station; the first processing module 300 generates and sends an RRC reconfiguration complete message while transmitting data through the original data radio bearer.

 As shown in FIG. 4, the macro base station in the system for transmitting data during the access point handover process provided by the embodiment of the present invention includes: a second processing module 400 and a notification module 410.

 The second processing module 400 is configured to determine that the user equipment needs to reconfigure all or part of the DRB from one cell to another when the RRC connection is unchanged;

 The notification module 410 is configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to switch the access point, and transmit data through the original data radio bearer during the access point handover process;

 The original data radio bearer is the last data radio bearer used before the access point of the data plane is switched.

 Preferably, the source cell in the access point handover process belongs to the macro base station, and the target cell belongs to the local base station. After receiving the RRC reconfiguration complete message from the user equipment, the second processing module 400 sends an ACK of the RLC layer to the user equipment. Feedback, delete the original data radio bearer or stop transmitting data through the original data radio bearer and delete the original data radio bearer or stop the original data radio bearer after the target cell transmits data through the new data radio bearer. Transmitting data and deleting the original data radio bearer after a set period of time, and notifying the target cell to transmit data through the new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

 Preferably, the source cell in the process of the access point handover belongs to the local base station, and the target cell belongs to the local base station; the second processing module 400 transmits data through the new data radio bearer, and notifies the source cell to delete the original data radio bearer or the notification. The source cell stops transmitting data through the original data radio bearer and deletes the original data radio bearer after the target cell transmits data through the new data radio bearer or notifies the source cell to stop transmitting data through the original data radio bearer and passes the design. After the timer is long, the original data radio bearer is deleted, and the target cell is notified to transmit data through the new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

Preferably, the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the macro base station. After receiving the RRC reconfiguration complete message from the user equipment, the second processing module 400 sends an ACK of the RLC layer to the user equipment. Feedback, simultaneously notify the source cell to delete the original data radio bearer or notify the source cell to stop transmitting data through the original data radio bearer and delete the original data radio bearer or pass after the target cell transmits data through the new data radio bearer. The source cell stops transmitting data through the original data radio bearer and deletes the original data radio bearer after a set period of time, and transmits data through the new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

 Based on the same inventive concept, the embodiment of the present invention further provides a method for a user equipment to transmit data during an access point handover process, and a method for a macro base station to notify a user equipment to transmit data during an access point handover process, which are solved by these methods. The principle of the problem is similar to the system for transmitting data in the process of the access point switching in the embodiment of the present invention. Therefore, the implementation of these methods can be referred to the implementation of the system, and the repeated description is not repeated.

 As shown in FIG. 5, the method for the user equipment to transmit data during the access point switching process according to the embodiment of the present invention includes the following steps:

 Step 501: The user equipment determines that all or part of the DRBs need to be reconfigured from one cell to another when the RRC connection is unchanged.

 Step 502: The user equipment transmits data through the original data radio bearer during the process of performing the access point handover, where the original data radio bearer is the last used data radio bearer before the access point of the data plane is switched.

 Preferably, the user equipment determines, according to the received parameters in the RRC connection reconfiguration message from the source cell, that all or part of the DRBs need to be reconfigured from one cell to another when the RRC connection is unchanged.

 The user equipment determines that a new data radio bearer needs to be configured after all or part of the DRBs are reconfigured from one cell to another in the case where the RRC connection is unchanged.

 Among them, there are various situations in which the handover access point is different according to the source cell and the target cell, which are respectively introduced below.

 Case 1: The source cell in the access point handover process belongs to the macro base station, and the target cell belongs to the local base station.

 Specifically, in the process of the access point switching, after configuring the new data radio bearer, the user equipment performs downlink synchronization operation on the target cell while transmitting data through the original data radio bearer.

 In the implementation, if the uplink is configured in the RRC reconfiguration process, the user equipment performs uplink synchronization operation on the target cell while transmitting data through the original data radio bearer.

 During the access point handover process, the user equipment transmits the data through the original data radio bearer, and after receiving the Rach Response message from the target cell, generates an RRC reconfiguration complete message, and sends an RRC to the macro base station. The reconfiguration complete message is then the user equipment 20 begins transmitting data on the new DRB.

 In the implementation, the user equipment has multiple processing methods for the original data radio bearer.

Processing mode 1. After receiving the HARQ ACK feedback or RLC ACK feedback of the RRC completion message, the user equipment transmits data through the new data radio bearer, and stops transmitting data in the original data radio bearer; and then receives the new data radio bearer. After the data is received, the original data radio bearer is deleted, or the original data is deleted after a set duration. Wireless bearer

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment deletes the original data radio bearer.

 Specifically, after the user equipment sends an RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment starts to delete the original data radio bearer while transmitting data on the new DRB.

 Case 2: The source cell in the access point handover process belongs to the local base station, and the target cell belongs to the local base station.

 Specifically, in the process of the access point switching, after configuring the new data radio bearer, the user equipment generates an RRC reconfiguration complete message, and sends an RRC reconfiguration complete message to the macro base station, and then the user equipment starts to transmit on the new DRB. data.

 In the implementation, the user equipment has multiple processing methods for the original data radio bearer.

 Processing mode 1. After receiving the HARQ ACK feedback or RLC ACK feedback of the RRC completion message, the user equipment transmits data through the new data radio bearer, and stops transmitting data in the original data radio bearer; and then receives the new data radio bearer. After the data is received, the original data radio bearer is deleted, or the original data radio bearer is deleted after a set duration;

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment deletes the original data radio bearer.

 Specifically, after transmitting the RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment 20 starts to delete the original data radio bearer while transmitting data on the new DRB.

 Case 3: The source cell in the process of the access point handover belongs to the local base station, and the target cell belongs to the macro base station.

 After receiving the HARQ ACK feedback or the RLC ACK feedback of the RRC completion message, the user equipment transmits data through the new data radio bearer, and stops transmitting data in the original data radio bearer; and then receives the data through the new data radio bearer. Delete the original data radio bearer, or delete the original data radio bearer after the set time.

 After the RRC reconfiguration complete message is sent to the source cell in the process of the access point handover, the user equipment deletes the original data radio bearer.

 Specifically, after the user equipment sends an RRC reconfiguration complete message to the source cell in the process of the access point handover, the user equipment starts to delete the original data radio bearer while transmitting data on the new DRB.

 As shown in FIG. 6, the method for the macro base station to notify the user equipment to transmit data during the access point handover process includes the following steps:

 Step 601: The macro base station determines that the user equipment needs to reconfigure all or part of the DRB from one cell to another when the RRC connection is unchanged.

Step 602: The macro base station sends an RRC connection reconfiguration message to the user equipment, to notify the user equipment to perform handover. The access point transmits data through the original data radio bearer during the access point switching process; wherein the original data radio bearer is the last data radio bearer used before the access point switching of the data plane.

 Preferably, the source cell in the access point handover process belongs to the macro base station, and the target cell belongs to the local base station; after the macro base station sends the RRC connection reconfiguration message, the method further includes:

 After receiving the RRC reconfiguration complete message from the user equipment, the macro base station sends a radio link control to the user equipment.

Correct ACK feedback of the RLC layer, delete the original data radio bearer or stop transmitting data through the original data radio bearer and delete the original data radio bearer after the target cell transmits data through the new data radio bearer or stop passing the original Some data radio bearers to transmit data and deletes the original data radio bearer after a set period of time, and notifies the target cell to transmit data through the new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

 Preferably, the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the local base station; after the macro base station sends the RRC connection reconfiguration message, the method further includes:

 The macro base station transmits data through the new data radio bearer, and notifies the source cell to delete the original data radio bearer or notify the source cell to stop transmitting data through the original data radio bearer and delete the data after the target cell transmits data through the new data radio bearer. The original data radio bearer or the notification source cell stops transmitting data through the original data radio bearer and deletes the original data radio bearer after the set time period, and notifies the target cell to transmit data through the new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

 Preferably, the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the macro base station; after the macro base station sends the RRC connection reconfiguration message, the method further includes:

 After receiving the RRC reconfiguration complete message from the user equipment, the macro base station sends an ACK feedback of the RLC layer to the user equipment, and notifies the source cell to delete the original data radio bearer or notify the source cell to stop transmitting through the original data radio bearer. After the data is transmitted by the target cell through the new data radio bearer, the original radio bearer is deleted or the source cell is notified to stop transmitting data through the original data radio bearer and delete the original data radio bearer after a set period of time. And transmitting data through a new data radio bearer;

 The new data radio bearer is configured by the user equipment in the access point switching process.

 In FIG. 5 and FIG. 6, a process may be synthesized to form a method for transmitting data during the access point switching process, that is, step 601 and step 602 are performed first, and then steps 501 and 502 are performed.

 The solution of the present invention will be described below by enumerating several examples for different scenarios.

Scene 1: The UE is currently only connected to the Macro e B. For the case of Macro e B to Local eNB, three examples are listed. Example 1,

 Step 1: After receiving the RRC connection reconfiguration message from the Macro e B, the UE determines that the DRB reconfiguration process is performed according to the parameters in the message (that is, reconfiguring the DRB to the Local eNB);

 Step 2: The UE still uses the old DRB link (ie, the DRB link with the source cell) to receive and transmit a PDCP PDU (Protocol Data Unit);

 Step 3: The UE configures the RLC, MAC, and PHY layers of the new DRB (ie, the DRB of the target cell);

 Step 4: The UE starts downlink synchronization operation for the Local eNB.

 Step 5: If the uplink is configured, the UE initiates an uplink synchronization operation for the Local eNB;

 Step 6: After receiving the Rach response message from the Local eNB, the UE starts to organize and send an RRC reconfiguration complete message.

Step 6a _{: The} UE starts to allow receiving downlink data of the new DRB.

 Step 7: After receiving the RRC reconfiguration complete message, the Macro eNB sends an ACK feedback of the RLC layer, stops the data transmission of the original DRB link, and notifies the Local eNB to start receiving and transmitting data on the new DRB. Step 8 After receiving the HARQ ACK feedback of the RRC reconfiguration complete message or the RLC ACK of the RRC reconfiguration complete message, the UE starts to send data on the new DRB, and terminates the data transmission of the old DRB;

 Step 9: When the UE receives the first data packet from the new DRB, or waits for a certain time after step 8, the link of the original DRB is completely deleted;

 Step 10: When the Local eNB receives the first data packet on the new DRB, it notifies the Macro eNB to completely delete the original DRB link, or waits for a certain time after the Step 7 to completely delete the original DRB link.

 Example 2

 Steps 1 ~ 4 Steps 1 to 4 of the same example 1;

 Step 5: After receiving the private preamble information, the new Local eNB responds to the Rach response message and starts to allow the uplink data of the new DRB to be received.

 Step 6: After receiving the Rach response message from the Local eNB, the UE starts to organize and send an RRC reconfiguration complete message, and simultaneously receives and sends data on the new DRB, and stops data transmission on the old DRB link.

 Step 7: After receiving the RRC reconfiguration complete message, the Macro eNB sends an ACK feedback of the RLC layer to notify the Local eNB to start transmitting data on the new DRB and terminate the old DRB link sending data.

 Step 8: The UE receives the HARQ ACK feedback of the RRC reconfiguration complete message or the RLC ACK of the RRC reconfiguration complete message.

Step 9: When the UE receives the first data packet from the new DRB, or waits for a certain time after step 8, the link of the original DRB will be completely deleted; Step 10: When the Local eNB receives the first data packet on the new DRB to notify the Macro eNB to completely delete the link of the original DRB, or waits for a certain time after the step 7, the Macro eNB completely deletes the link of the original DRB.

 Example three,

 Steps 1 ~ 6: Steps 1 to 6 of the same example

 Step 6a: The UE starts to allow data transmission and reception on the new DRB, and the UE deletes the old DRB link. Step 7: After receiving the RRC reconfiguration complete message, the Macro eNB sends an ACK feedback of the RLC layer and deletes the ACK message. The old DRB link notifies the Local eNB to transmit and receive data on the new DRB.

 Scenario 2: The UE is connected to the Macro eNB and the local eNB at the same time (the SRB is in the Macro and the DRB is in the local). For the case of a Local eNB to a Macro eNB, two examples are listed.

 Example 1,

 Step 1: After receiving the RRC connection reconfiguration message from the Macro eNB, the UE determines that the DRB reconfiguration process is performed according to the parameters in the message (that is, reconfiguring the DRB to the Macro eNB);

 Step 2: The UE still uses the old DRB link to receive and send PDCP PDUs;

 Step 3: The UE starts to configure the RLC/MAC/PHY layer of the new DRB.

 Step 4: The UE starts to organize and send an RRC reconfiguration complete message;

Step 4a _{: The} UE starts to allow receiving downlink data of the new DRB.

 Step 5: After receiving the RRC reconfiguration complete message, the Macro eNB sends an ACK feedback of the RLC layer, and notifies the Local eNB to stop data transmission of the original DRB link, and starts receiving and transmitting data on the new DRB. 6: After receiving the HARQ ACK feedback of the RRC reconfiguration complete message or the RLC ACK of the RRC reconfiguration complete message, the UE starts to send data on the new DRB, and terminates the data transmission of the old DRB;

 Step 7: When the UE receives the first data packet from the new DRB, or waits for a certain time after step 6, the link of the original DRB is completely deleted;

 Step 8: When the Local eNB receives the first data packet on the new DRB, or waits for a certain time after step 5, the original DRB link will be completely deleted.

 Example 2

 Step 1: After the Macro eNB organizes and sends the RRC connection reconfiguration message, it starts to allow data transmission and reception on the new DRB, and notifies the Local eNB to delete the original DRB link.

 Step 2: After receiving the RRC connection reconfiguration message from the Macro eNB, the UE determines that the DRB reconfiguration process is performed according to the parameters in the message (that is, reconfiguring the DRB to the Macro eNB);

 Step 2: The UE deletes the old DRB link and starts to allow data transmission and reception on the new DRB.

Step 3: The UE starts to organize and send an RRC reconfiguration complete message; Step 4: After receiving the RRC reconfiguration complete message, the Macro e B will send an ACK feedback of the RLC layer. Step 5: The UE receives this ACK.

 Scenario 3: The UE is connected to the Macro eNB and a local e B at the same time (the SRB is in the Macro and the DRB is in the local). For the case of going from one Local eNB to another Local eNB, two examples are listed.

 Example 1,

 Steps 1 ~ 6a: The same as the first step 1 ~ 6a of the scene 1;

 Step 7: After receiving the RRC reconfiguration complete message, the Macro eNB sends an ACK feedback of the RLC layer to the organization, and notifies the source Local eNB to stop the data transmission of the original DRB link, and notifies the target Local eNB to start receiving on the new DRB. send data;

 Step 8: The RLC of the HARQ ACK feedback or the RRC reconfiguration complete message received by the UE for the RRC reconfiguration complete message

After ACK, data will be sent on the new DRB, and the data transmission of the old DRB will be terminated.

 Step 9: When the UE receives the first data packet from the new DRB, or waits for a certain time after step 8, the link of the original DRB is completely deleted;

 Step 10: When the target Local eNB receives the first data packet on the new DRB, or waits for a certain time after step 7, the original DRB link will be completely deleted.

 Example 2

 Steps 1 ~ 6a: The same as the first step 1 ~ 6a of the scene 1;

 Step 7: After receiving the RRC reconfiguration complete message, the Macro eNB will send an ACK feedback of the RLC layer, and notify the original Local eNB to delete the old DRB link, and notify the target Local eNB to send and receive data on the new DRB.

 Based on the same technical concept, an embodiment of the present invention further provides a user equipment and a base station.

 FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown, the user equipment can include: a transceiver 71, a processor 72, wherein:

 The processor 72 is configured to determine that all or part of the DRB needs to be reconfigured from the source cell to the target cell if the RRC connection is unchanged.

 The transceiver 71 is configured to transmit data by using a data radio bearer with the source cell during the access point switching process of the data plane, where the data radio bearer with the source cell is the last before the access point of the data plane is switched. The data used is wirelessly carried.

 Specifically, the processor 72 may determine, according to the received parameters in the RRC connection reconfiguration message from the macro cell, that all or part of the DRBs need to be reconfigured from the source cell to the target cell if the RRC connection is unchanged.

Specifically, the processor 72 further determines, after the RRC connection is unchanged, reconfigures all or part of the DRB from the source cell to the target cell, and maintains the data radio bearer with the source cell according to the set duration, and configures And goal The data radio bearer of the cell.

 Further, the processor 72 may delete the device after the RRC reconfiguration complete message is sent by the macro cell in the process of the access point switching of the data plane in the access point switching process of the data plane. Or the data radio bearer of the source cell; or, after the transceiver 71 sends an RRC reconfiguration complete message to the macro cell in the access point switching process of the data plane, and after receiving data by using the data radio bearer of the target cell, Deleting the data radio bearer with the source cell; or deleting, after the transceiver 71 sends the RRC reconfiguration complete message to the macro cell in the access point switching process of the data plane, deleting the source cell with a set duration Or the data radio bearer; or, after the transceiver 71 sends an RRC reconfiguration complete message to the macro cell in the access point switching process of the data plane, deleting the signaling message from the source cell and deleting the source cell Data radio bearer.

 In the case that the target cell in the access point switching process of the data plane belongs to the small cell base station, the processor 72 is further configured to: during the access point switching process of the data plane, pass through the source cell with the transceiver 71. The data radio bearer transmits data while performing downlink synchronization operation on the target cell; or, in the process of performing the access point switching process of the data plane, the transceiver 71 transmits data through the data radio bearer with the source cell. When the downlink synchronization operation is performed on the target cell, and the uplink is configured in the RRC reconfiguration process, the transceiver 71 performs uplink synchronization operation on the target cell while transmitting data through the data radio bearer with the source cell.

 In the case that the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the small cell base station, the processor 72 may also perform the data point access point switching process in the transceiver. After receiving the HARQ ACK feedback or the RLC ACK feedback of the RRC completion message, the data transmission is performed by transmitting data with the data radio bearer of the target cell, and stopping data transmission in the data radio bearer with the source cell.

 In the case that the target cell belongs to the small cell base station, the processor 72 may receive the data from the data radio bearer of the source cell while receiving the data in the access point switching process of the data plane. After the Rach Response message of the target cell, the RRC reconfiguration complete message is generated and sent by the transceiver 71. Alternatively, the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the macro base station. The processor 72 may generate and transmit an RRC reconfiguration complete message through the transceiver 71 while the transceiver 71 transmits data through the data radio bearer with the source cell during the access point switching process of the data plane.

 FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown, the base station can include a transceiver 81 and a processor 82, wherein:

 The processor 82 is configured to determine that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell if the RRC connection is unchanged;

The transceiver 81 is configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to perform a data access point switching access point, and perform wireless data with the source cell during the access point handover process. Bearer transmission number According to the data radio bearer with the source cell, the last data radio bearer used before the access point switching of the data plane is performed.

 In the case that the source cell in the access point switching process of the data plane belongs to the macro base station, and the target cell belongs to the small cell base station, the processor 82 may also send and receive after the RRC connection reconfiguration message is sent by the transceiver 81. After receiving the RRC reconfiguration complete message from the user equipment, the device 81 generates an ACK feedback of the RLC layer, and sends the generated ACK of the RLC layer to the user equipment through the transceiver 81, and deletes the source cell and the The data radio bearer of the user equipment; or, after the target cell transmits data through the data radio bearer of the user equipment, stopping data transmission through the source cell and the data radio bearer of the user equipment, and deleting the source cell And performing data radio bearer with the user equipment; or, after a set period of time, stopping transmitting data through the data radio bearer of the source cell and the user equipment, and deleting data radio bearers of the source cell and the user equipment And notifying, by the transceiver 81, the data radio bearer of the target cell and the user equipment by using the target cell Transmitting data; or, after receiving the signaling message from the source cell, the transceiver 81 stops transmitting data through the data radio bearer of the source cell and the user equipment, and deletes the data radio bearer of the source cell and the user equipment. . The data radio bearer of the target cell and the user equipment is configured by the user equipment during the access point switching process of the data plane.

 In the case that the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the small cell base station, the processor 82 may also pass the target cell after the transceiver 81 sends the RRC connection reconfiguration message. Transmitting data with the data radio bearer of the user equipment, and notifying the source cell to delete the data radio bearer of the source cell and the user equipment by using the transceiver 81, or notifying the source cell to stop passing through the transceiver 81. The data radio bearer of the user equipment of the source cell transmits data and deletes the data radio bearer of the source cell and the user equipment after the target cell transmits data through the data radio bearer of the target cell and the user equipment. Transmitting, by the transceiver 81, the source cell to stop transmitting data through the data radio bearer of the source cell and the user equipment, and deleting the data radio bearer of the source cell and the user equipment after a set time period, And notifying, by the transceiver 81, the target cell to pass the target cell and the user equipment The data radio bearers transmit data. The data radio bearer of the target cell and the user equipment is configured by the user equipment during the access point switching process of the data plane.

In the case that the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the macro base station, the processor 82 may also send and receive after the RRC connection reconfiguration message is sent by the transceiver 81. After receiving the RRC reconfiguration complete message from the user equipment, the device 81 generates an ACK feedback of the RLC layer and sends the generated RLC layer ACK feedback to the user equipment through the transceiver 81, and notifies the source through the transceiver 81. Deleting, by the transceiver, the data radio bearer of the source cell and the user equipment, or notifying, by the transceiver 81, that the source cell stops transmitting data through the data radio bearer of the source cell and the user equipment, and passes the data in the target cell. The target cell and the user After the data radio bearer transmits the data, the data radio bearer of the source cell and the user equipment is deleted, or the source cell is notified by the transceiver 81 to stop transmitting data through the data radio bearer of the source cell and the user equipment. And deleting the data radio bearer of the source cell and the user equipment after the set time period, and transmitting data by using the data radio bearer of the target cell and the user equipment. The data radio bearer of the target cell and the user equipment is configured by the user equipment in the access point switching process.

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

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

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

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

 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

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

Claims

Rights request

1. A method for transmitting data during access point switching, characterized in that the method includes:

The user equipment determines that it needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell while the radio resource control RRC connection remains unchanged;

During the access point switching process of the data plane, the user equipment transmits data through the data radio bearer with the source cell, where the data radio bearer with the source cell was the last used before the access point switching of the data plane. Data wireless carrying.

2. The method of claim 1, wherein the user equipment determines that it is necessary to reconfigure all or part of the DRBs from the source cell to the target cell when the RRC connection remains unchanged, including:

The user equipment determines that it needs to perform the configuration according to the parameters in the RRC connection reconfiguration message received from the macro cell.

When the RRC connection remains unchanged, all or part of the DRBs are reconfigured from the source cell to the target cell.

3. The method of claim 1, wherein after the user equipment determines that it is necessary to reconfigure all or part of the DRBs from the source cell to the target cell while the RRC connection remains unchanged, it further includes:

The user equipment is configured with a data radio bearer of the target cell.

4. The method according to claim 2 or 3, wherein the user equipment performs an access point switching process on the data plane, further comprising:

After the user equipment sends an RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, delete the data radio bearer with the source cell; or

The user equipment sends an RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, and after receiving the data through the data radio bearer with the target cell, deletes the data radio bearer with the source cell. ; Or after the user equipment sends an RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, it deletes the data radio bearer with the source cell after a set period of time; or

After the user equipment sends an RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, it deletes the data radio bearer with the source cell by receiving a signaling message from the source cell.

5. The method of claim 1, wherein the target cell in the access point switching process of the data plane belongs to a small cell base station;

The user equipment performs an access point switching process on the data plane, including:

The user equipment performs downlink synchronization operations on the target cell while transmitting data through the data wireless bearer with the source cell; or

The user equipment performs an access point switching process on the data plane, including: While transmitting data through the data radio bearer with the source cell, the user equipment performs downlink synchronization operations on the target cell, and when uplink is configured during the RRC reconfiguration process, the user equipment transmits data through the data radio bearer with the source cell. At the same time, the uplink synchronization operation is performed for the target cell.

6. The method according to claim 2 or 3, characterized in that the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the small cell base station;

The user equipment performs an access point switching process on the data plane, which also includes:

After receiving the hybrid automatic repeat request HARQ ACK feedback or the radio link control RLC ACK feedback of the RRC completion message, the user equipment transmits data through the data radio bearer with the target cell, and stops transmitting data on the data radio bearer with the source cell. transfer data.

7. The method of claim 1, wherein the target cell belongs to a small cell base station, and the user equipment performs an access point switching process on the data plane, including: the user equipment communicates with the source cell through While the data radio bearer is transmitting data, after receiving the random access channel response Rach Response message from the target cell, generate and send the RRC reconfiguration complete message; or

The source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the macro base station; The user equipment performs the access point switching process of the data plane, including: The user equipment communicates with the source cell through While transmitting data on the data radio bearer, an RRC reconfiguration complete message is generated and sent.

8. A method for transmitting data during access point switching, characterized in that the method includes:

The macro base station determines that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell while the radio resource control RRC connection remains unchanged;

The macro base station sends an RRC connection reconfiguration message to the user equipment to notify the user equipment to switch access points on the data plane, and during the access point switching process, the data wireless bearer transmission with the source cell is carried out. Data; wherein, the data radio bearer with the source cell is the last used data radio bearer before access point handover on the data plane.

9. The method of claim 8, wherein the source cell in the access point handover process of the data plane belongs to the macro base station, and the target cell belongs to the small cell base station;

After the macro base station sends the RRC connection reconfiguration message, it also includes:

After receiving the RRC reconfiguration completion message from the user equipment, the macro base station sends a correct ACK feedback of the radio link control RLC layer to the user equipment, and at the same time deletes the data of the source cell and the user equipment. wireless bearer, or

After the target cell transmits data through the data radio bearer with the user equipment, it stops transmitting data through the data radio bearer between the source cell and the user equipment and deletes the data radio bearer between the source cell and the user equipment. line carrying, or

After the set time period, stop transmitting data through the data radio bearers of the source cell and the user equipment, delete the data radio bearers of the source cell and the user equipment, and notify the target cell to communicate with the user equipment through the target cell. The data radio bearer of the user equipment transmits data; or

After receiving the signaling message from the source cell, stop transmitting data through the data radio bearer of the source cell and the user equipment and delete the data radio bearer of the source cell and the user equipment;

Wherein, the data radio bearer between the target cell and the user equipment is configured by the user equipment during the access point handover process of the data plane.

10. The method of claim 8, wherein the source cell in the access point switching process of the data plane belongs to a small cell base station, and the target cell belongs to a small cell base station;

After the macro base station sends the RRC connection reconfiguration message, it also includes:

The macro base station transmits data through the data radio bearer of the target cell and the user equipment, and at the same time notifies the source cell to delete the data radio bearer of the source cell and the user equipment, or notifies the source cell to stop using the data radio bearer of the source cell and the user equipment. The data radio bearer of the user equipment in the source cell transmits data and deletes the data radio bearer of the source cell and the user equipment after the target cell transmits data through the data radio bearer of the target cell and the user equipment, Or notify the source cell to stop transmitting data through the data radio bearer of the source cell and the user equipment and delete the data radio bearer of the source cell and the user equipment after a set period of time, and notify the target The cell transmits data through the data radio bearer between the target cell and the user equipment;

Wherein, the data radio bearer between the target cell and the user equipment is configured by the user equipment during the access point handover process of the data plane.

11. The method according to claim 8, characterized in that the source cell in the access point handover process of the data plane belongs to the small cell base station, and the target cell belongs to the macro base station;

After the macro base station sends the RRC connection reconfiguration message, it also includes:

After receiving the RRC reconfiguration completion message from the user equipment, the macro base station sends an RLC layer ACK feedback to the user equipment, and at the same time notifies the source cell to delete the data between the source cell and the user equipment. radio bearer, or notify the source cell to stop transmitting data through the data radio bearer between the source cell and the user equipment and delete the data after the target cell transmits data through the data radio bearer between the target cell and the user equipment. The data radio bearer between the source cell and the user equipment, or the source cell is notified to stop transmitting data through the data radio bearer between the source cell and the user equipment and deletes the source cell and the user equipment after a set period of time. The data radio bearer of the user equipment, and transmits data through the data radio bearer of the target cell and the user equipment;

Wherein, the data radio bearer between the target cell and the user equipment is the user equipment during the access point handover process. configured.

12. A user equipment, characterized in that the user equipment includes:

The first processing module is used to determine that all or part of the data radio bearer DRB needs to be reconfigured from the source cell to the target cell while the radio resource control RRC connection remains unchanged;

The transmission module is configured to transmit data through the original data wireless bearer during the access point switching process, where the original data wireless bearer is the last used data wireless bearer before access point switching on the data plane.

13. The user equipment according to claim 12, wherein the first processing module is specifically configured to: determine whether the RRC connection needs to be unchanged according to the parameters in the RRC connection reconfiguration message received from the source cell. In this case, all or part of the DRBs are reconfigured from the source cell to the target cell.

14. The user equipment according to claim 12, wherein the first processing module is further configured to: determine that all or part of the DRB needs to be reconfigured from the source cell to the target cell while the RRC connection remains unchanged. After that, configure the new data radio bearer.

15. The user equipment according to claim 14, wherein the first processing module is further configured to: after sending an RRC reconfiguration completion message to the source cell in the access point handover process, delete the The original data radio bearer; or sending an RRC reconfiguration completion message to the source cell during the access point handover process, and after receiving data through the new data radio bearer, deleting the original data radio bearer; or After sending an RRC reconfiguration completion message to the source cell in the access point handover process, the original data radio bearer is deleted after a set time period.

16. The user equipment according to claim 12, characterized in that, the target cell in the access point handover process belongs to the local base station;

The first processing module is also used to:

While transmitting data through the original data wireless bearer, downlink synchronization operations are performed on the target cell.

17. The user equipment according to claim 16, wherein the first processing module is further configured to: if uplink is configured during the RRC reconfiguration process, while transmitting data through the original data radio bearer, target The cell performs uplink synchronization operations.

18. The user equipment according to claim 16, wherein the first processing module is further configured to: while transmitting data through the original data wireless bearer, receive a random access channel from the target cell. After responding to the Rach Response message, an RRC reconfiguration complete message is generated and sent.

19. The user equipment according to claim 14, wherein the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the local base station;

The first processing module is also used to:

Hybrid Automatic Repeat Request HARQ ACK feedback or Radio Link Control RLC ACK upon receipt of RRC Complete message After feedback, data is transmitted through the new data radio bearer, and data transmission on the original data radio bearer is stopped.

20. The user equipment according to claim 12, characterized in that the source cell in the access point handover process belongs to the local base station, and the target cell belongs to the macro base station;

The first processing module is also used to:

While transmitting data through the original data radio bearer, an RRC reconfiguration complete message is generated and sent.

21. A base station, characterized in that the base station includes:

The second processing module is used to determine that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell while the radio resource control RRC connection remains unchanged;

A notification module, configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to switch access points, and to transmit data through the original data wireless bearer during the access point switching process;

Wherein, the original data radio bearer is the data radio bearer that was last used before access point switching on the data plane.

22. The base station according to claim 21, wherein the source cell in the access point handover process belongs to the macro base station, and the target cell belongs to the local base station;

The second processing module is also used to:

After receiving the RRC reconfiguration completion message from the user equipment, send an RLC layer ACK feedback to the user equipment, and at the same time delete the original data radio bearer, or stop passing the original data radio bearer. Transmit data and delete the original data radio bearer after the target cell transmits data through the new data radio bearer, or stop transmitting data through the original data radio bearer and delete the original data radio bearer after a set period of time. The original data radio bearer and notifies the target cell to transmit data through the new data radio bearer;

Among them, the new data radio bearer is configured by the user equipment during the access point switching process.

23. The base station according to claim 21, wherein the source cell in the access point switching process belongs to the local base station, and the target cell belongs to the local base station;

The second processing module is also used to:

Transmit data through the new data radio bearer, and at the same time notify the source cell to delete the original data radio bearer, or notify the source cell to stop transmitting data through the original data radio bearer and pass it through in the target cell. Delete the original data radio bearer after the new data radio bearer transmits data, or notify the source cell to stop transmitting data through the original data radio bearer and delete the original data after a set period of time. wireless bearer, and notify the target cell to transmit data through the new data wireless bearer;

Among them, the new data radio bearer is configured by the user equipment during the access point switching process.

24. The base station according to claim 21, characterized in that, the source cell in the access point switching process belongs to the local Ground base station, the target cell belongs to the macro base station;

The second processing module is also used to:

After receiving the RRC reconfiguration completion message from the user equipment, send an RLC layer ACK feedback to the user equipment, and at the same time notify the source cell to delete the original data radio bearer, or notify the source cell Stop transmitting data through the original data radio bearer and delete the original data radio bearer after the target cell transmits data through the new data radio bearer, or notify the source cell to stop transmitting data through the original data radio bearer. The data radio bearer transmits data and deletes the original data radio bearer after a set period of time, and transmits data through a new data radio bearer;

Among them, the new data radio bearer is configured by the user equipment during the access point switching process.

25. A system, characterized in that the system includes:

The macro base station is used to determine that the user equipment needs to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell when the radio resource control RRC connection remains unchanged, and sends an RRC connection reconfiguration message to the user equipment. , used to notify the user equipment to switch access points, and transmit data through the original data wireless bearer during the access point switching process;

The user equipment is used to determine the need to reconfigure all or part of the data radio bearer DRB from the source cell to the target cell under the condition that the radio resource control RRC connection remains unchanged. During the access point handover process, through the original The data radio bearer transmits data, wherein the original data radio bearer is the last used data radio bearer before access point switching on the data plane.

26. A user equipment, characterized by: including:

A processor configured to determine that all or part of the data radio bearer DRB needs to be reconfigured from the source cell to the target cell while the radio resource control RRC connection remains unchanged;

The transceiver is used to transmit data through the data wireless bearer with the source cell during the access point switching process of the data plane, wherein the data wireless bearer with the source cell is the last used before the access point switching of the data plane. of data wirelessly carried.

27. The user equipment according to claim 26, wherein the processor is specifically configured to determine, according to the parameters in the RRC connection reconfiguration message received from the macro cell, that the RRC connection needs to remain unchanged. Next, all or part of the DRBs are reconfigured from the source cell to the target cell.

28. The user equipment according to claim 26, wherein the processor is further configured to reconfigure all or part of the DRBs from the source cell to the target cell when it is determined that the RRC connection remains unchanged. Afterwards, configure the data radio bearer with the target cell.

29. The user equipment according to claim 27 or 28, characterized in that the processor is further configured to perform data processing. During the access point switching process of the data plane, the transceiver transmits to the macro cell during the access point switching process of the data plane.

After the RRC reconfiguration completion message, delete the data radio bearer associated with the source cell; or

After the transceiver sends an RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, and after receiving the data through the data radio bearer with the target cell, delete the data radio with the source cell. bearer; or after the transceiver sends the RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, delete the data radio bearer with the source cell after a set time period; or

After the transceiver sends the RRC reconfiguration completion message to the macro cell during the access point handover process of the data plane, the data radio bearer with the source cell is deleted by receiving the signaling message from the source cell.

30. The user equipment according to claim 26, wherein the target cell in the access point handover process of the data plane belongs to a small cell base station;

The processor is also configured to perform downlink synchronization operations on the target cell while the transceiver transmits data through the data wireless bearer with the source cell during the access point switching process on the data plane; or

During the access point switching process of the data plane, while the transceiver transmits data through the data radio bearer with the source cell, it performs downlink synchronization operations on the target cell, and configures the uplink during the RRC reconfiguration process. In this case, while the transceiver transmits data through the data wireless bearer with the source cell, it performs an uplink synchronization operation for the target cell.

31. The user equipment according to claim 27 or 28, characterized in that the source cell in the access point handover process of the data plane belongs to the small cell base station, and the target cell belongs to the small cell base station;

The processor is also configured to, during the access point switching process of the data plane, after the transceiver receives the hybrid automatic repeat request HARQ ACK feedback or the radio link control RLC ACK feedback of the RRC completion message, through Transmit data with the data radio bearer of the target cell, and stop transmitting data with the data radio bearer of the source cell.

32. The user equipment according to claim 26, wherein the target cell belongs to a small cell base station; the processor is specifically configured to: during the access point switching process of the data plane, in the transceiver While transmitting data through the data radio bearer of the source cell, after receiving the random access channel response Rach Response message from the target cell, generate and send the RRC reconfiguration completion message through the transceiver; or

In the case where the source cell during the access point switching process of the data plane belongs to a small cell base station and the target cell belongs to a macro base station; the processor is specifically configured to, during the access point switching process of the data plane, While transmitting data through the data radio bearer of the source cell, the transceiver generates and sends an RRC reconfiguration completion message through the transceiver.

33. A base station, characterized by including:

The processor is used to determine that the user equipment needs to transfer all or part of the radio resource control RRC connection to the The data radio bearer DRB is reconfigured from the source cell to the target cell;

A transceiver, configured to send an RRC connection reconfiguration message to the user equipment, to notify the user equipment to switch access points on the data plane, and to use the data wireless bearer with the source cell during the access point switching process. Transmit data; wherein, the data radio bearer with the source cell is the last used data radio bearer before access point switching on the data plane.

34. The base station according to claim 33, characterized in that the source cell in the access point handover process of the data plane belongs to the macro base station, and the target cell belongs to the small cell base station;

The processor is also configured to, after the transceiver sends the RRC connection reconfiguration message, and after the transceiver receives the RRC reconfiguration complete message from the user equipment, generate a correct wireless link control RLC layer ACK feedback and sends the generated RLC layer ACK to the user equipment through the transceiver, and at the same time deletes the data radio bearer of the source cell and the user equipment, or

After the target cell transmits data through the data radio bearer with the user equipment, it stops transmitting data through the data radio bearer between the source cell and the user equipment and deletes the data radio bearer between the source cell and the user equipment. , or

After the set time period, stop transmitting data through the data radio bearer of the source cell and the user equipment, delete the data radio bearer of the source cell and the user equipment, and notify the target cell through the transceiver. The data radio bearer of the target cell and the user equipment transmits data; or

After receiving the signaling message from the source cell through the transceiver, stop transmitting data through the data radio bearer of the source cell and the user equipment and delete the data radio bearer of the source cell and the user equipment;

Wherein, the data radio bearer between the target cell and the user equipment is configured by the user equipment during the access point handover process of the data plane.

35. The base station according to claim 33, characterized in that the source cell in the access point switching process of the data plane belongs to the small cell base station, and the target cell belongs to the small cell base station;

The processor is also configured to, after the transceiver sends the RRC connection reconfiguration message, transmit data through the data radio bearer between the target cell and the user equipment, and at the same time notify the source cell to delete the The source cell and the data radio bearer of the user equipment, or notify the source cell through the transceiver to stop transmitting data through the data radio bearer of the user equipment in the source cell and transmit data through the target cell in the target cell. After transmitting data with the data radio bearer of the user equipment, delete the data radio bearer of the source cell and the user equipment, or notify the source cell through the transceiver to stop passing the data radio bearer of the source cell and the user equipment. The data radio bearer transmits data and deletes the data radio bearer of the source cell and the user equipment after a set period of time, and notifies the target cell through the transceiver of the data of the target cell and the user equipment. Wireless bearers transmit data; Wherein, the data radio bearer between the target cell and the user equipment is configured by the user equipment during access point handover on the data plane.

36. The base station according to claim 33, characterized in that the source cell in the access point handover process of the data plane belongs to the small cell base station, and the target cell belongs to the macro base station;

The processor is also configured to, after the transceiver sends the RRC connection reconfiguration message, and after the transceiver receives the RRC reconfiguration complete message from the user equipment, generate an ACK feedback of the RLC layer and pass the The transceiver sends the generated RLC layer ACK feedback to the user equipment, and simultaneously notifies the source cell through the transceiver to delete the data radio bearer between the source cell and the user equipment, or notifies the source cell through the transceiver. The source cell stops transmitting data through the data radio bearer of the source cell and the user equipment and deletes the source cell and the user equipment after the target cell transmits data through the data radio bearer of the target cell and the user equipment. The data radio bearer of the user equipment, or notify the source cell through the transceiver to stop transmitting data through the data radio bearer of the source cell and the user equipment and delete the source cell and the data radio bearer after a set period of time. The data radio bearer of the user equipment, and transmits data through the data radio bearer of the target cell and the user equipment;

Wherein, the data radio bearer between the target cell and the user equipment is configured by the user equipment during an access point handover process.