WO2017020253A1 - 用于辅基站切换的方法、网络设备和用户设备 - Google Patents

用于辅基站切换的方法、网络设备和用户设备 Download PDF

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Publication number
WO2017020253A1
WO2017020253A1 PCT/CN2015/086057 CN2015086057W WO2017020253A1 WO 2017020253 A1 WO2017020253 A1 WO 2017020253A1 CN 2015086057 W CN2015086057 W CN 2015086057W WO 2017020253 A1 WO2017020253 A1 WO 2017020253A1
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WIPO (PCT)
Prior art keywords
base station
secondary base
candidate
network device
candidate secondary
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Ceased
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PCT/CN2015/086057
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English (en)
French (fr)
Inventor
戴明增
黄曲芳
张健
曾清海
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP15900028.0A priority Critical patent/EP3316625B1/en
Priority to PCT/CN2015/086057 priority patent/WO2017020253A1/zh
Priority to CN201580067461.3A priority patent/CN107005907A/zh
Publication of WO2017020253A1 publication Critical patent/WO2017020253A1/zh
Priority to US15/887,369 priority patent/US10624003B2/en
Anticipated expiration legal-status Critical
Priority to US16/820,115 priority patent/US10972945B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00698—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using different RATs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a method, a network device, and a user equipment for a secondary base station handover.
  • the embodiments of the present invention provide a method, a network device, and a user equipment for a secondary base station handover.
  • a first aspect provides a method for a secondary base station handover, where the network device sends an advance preparation indication to each of the at least one candidate secondary base station, where the advance preparation indication is used to indicate the at least one Each candidate secondary base station in the candidate secondary base station performs path switching preparation, so that each candidate secondary base of the at least one candidate secondary base station waits for the user equipment UE to select it as the target secondary base station, and the path switching preparation includes At least one of the following: pre-configuring a resource for accessing the UE, and establishing a data transmission channel with the network device; the network device transmitting, to the UE, each candidate secondary base station of the at least one candidate secondary base station Configuration information, so that the UE switches to the target secondary base station in the at least one candidate secondary base station according to configuration information of each candidate secondary base station in the at least one candidate secondary base station when the secondary base station handover needs to be performed. .
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station The information about the access resources pre-configured by the UE and the uplink grant information pre-configured by the candidate secondary base station for the UE.
  • the method further includes: sending, by the UE, a first indication message, where the first The indication message is used to indicate a handover trigger condition for the UE to perform handover, where the handover trigger condition includes at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; The signal quality of the first candidate secondary base station in a candidate secondary base station is higher than a second threshold; the load of the secondary base station currently accessed by the UE is higher than a third threshold; and the second candidate in the at least one candidate secondary base station The signal quality of the base station is below a fourth threshold.
  • each of the at least one candidate secondary base station is sent to the UE Before the configuration information of the candidate secondary base station, the method further includes: determining a priority of each candidate secondary base station in the at least one candidate secondary base station according to current state information of each candidate secondary base station in the at least one candidate secondary base station Transmitting, to the UE, priority information of each candidate secondary base station in the at least one candidate secondary base station, so that the UE is preferentially configured according to priority information of each candidate secondary base station in the at least one candidate secondary base station; Switching to the target secondary base station in the at least one candidate secondary base station.
  • the method further includes: determining the UE and the target secondary base station The access process is completed; data is sent to the target secondary base station, so that the UE and the target secondary base station perform data transmission.
  • the determining that the UE and the fourth secondary base station complete an access procedure including: receiving a second indication message sent by the UE, where the second indication message is used to indicate that the UE successfully accesses the target secondary base station; and/or receives a third indication message sent by the target secondary base station, where the The three indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • the network device is a small station controller
  • the method further includes: receiving, by the primary base station, a measurement report of the UE, where the measurement report includes a measurement result of the UE to multiple secondary base stations; and determining, according to the measurement report, the multiple secondary base stations At least one candidate secondary base station.
  • a method for a secondary base station handover where the user equipment UE receives configuration information of each candidate secondary base station in at least one candidate secondary base station that is sent by the network device, where the at least one candidate Each candidate secondary base station in the base station has completed the path switching preparation and waits for the UE to select it as the target secondary base station, and the path switching preparation includes at least one of the following: pre-configuring the access resource for the UE, and Establishing a data transmission channel between the network devices; and when the UE needs to perform the secondary base station handover, switching to the at least one candidate secondary base station according to configuration information of each candidate secondary base station in the at least one candidate secondary base station Target secondary base station.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station The information about the access resources pre-configured by the UE and the uplink grant information pre-configured by the candidate secondary base station for the UE.
  • the method further includes: receiving a first indication message sent by the network device, and Determining, according to the first indication message, that the UE needs to perform a secondary base station handover, where the first indication message is used to indicate a handover trigger condition when the UE performs handover, and the trigger condition includes at least one of the following conditions: The signal quality of the secondary base station currently accessed by the UE is lower than the first threshold; the signal quality of the first candidate secondary base station in the at least one candidate secondary base station is higher than the second threshold; the secondary base station currently accessed by the UE The load is higher than the third threshold; the load of the second candidate secondary base station in the at least one candidate secondary base station is lower than the fourth threshold.
  • the configuration information of each candidate secondary base station is switched to the target secondary base station in the at least one candidate secondary base station, including: receiving a second indication message sent by the network device, where the second indication message carries the at least one a priority information of each of the candidate secondary base stations; determining the target secondary base station according to the priority information of each of the at least one candidate secondary base station; and according to the second indication message and the target secondary base station The configuration information is switched to the target secondary base station.
  • the fourth aspect in the second aspect further includes: sending, by the network device, the measurement report of the UE The measurement report is used by the network device to determine the target secondary base station according to the measurement report, receive a third indication message of the network device, and determine, according to the third indication message, that the UE needs to perform a secondary base station.
  • the third indication message is used to indicate that the UE switches to the target secondary base station.
  • the method further includes: the UE accessing the target secondary base station Then, the fourth indication message is sent to the network device, where the fourth indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • a third aspect provides a method for a secondary base station handover, where the secondary base station receives the advance preparation indication information sent by the network device, where the advance preparation indication information is used to instruct the secondary base station to perform path switching preparation, where the path is
  • the handover preparation includes at least one of the following: pre-configuring an access resource for the user equipment UE, and establishing a data transmission channel corresponding to the UE with the network device; performing path switching according to the advance preparation indication information Preparing and waiting for the UE to switch to the secondary base station.
  • the method further includes: sending an advance preparation completion message to the network device, where the advance preparation completion message carries at least one of the following information The information about the access resource pre-configured by the secondary base station and the general packet radio system tunneling protocol tunnel identifier GTP TEID allocated by the secondary base station to the UE.
  • the method further includes: when the UE successfully accesses the secondary base station, the secondary base station And transmitting, to the network device, indication information, where the indication information is used to indicate that the UE has successfully accessed the secondary base station.
  • a network device including: a determining unit, configured to determine to send advance preparation indication information to each candidate secondary base station in at least one candidate secondary base station, where the advance preparation indication information is used to indicate Each candidate secondary base station in the at least one candidate secondary base station performs path switching preparation, so that each candidate secondary base of the at least one candidate secondary base station waits for the user equipment UE to select it as the target secondary base station,
  • the path switching preparation includes at least one of: performing access resources for the UE pre-configuration, and establishing a data transmission channel with the network device; and a sending unit, where the sending unit is configured to be in the at least one candidate secondary base station Each candidate prosthetic group
  • the station sends the advance preparation indication information, where the advance preparation indication information is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs path switching preparation, so as to facilitate each of the at least one candidate secondary base station.
  • the candidate secondary base waits for the UE to select it as the target secondary base station, and the path switching preparation includes at least one of: performing access resources for the UE pre-configuration, and establishing a data transmission channel with the network device.
  • the sending unit is further configured to send, to the UE, configuration information of each candidate secondary base station in the at least one candidate secondary base station, so that the UE is configured according to the at least one candidate when the secondary base station handover needs to be performed.
  • the configuration information of each candidate secondary base station in the base station is switched to the target secondary base station in the at least one candidate secondary base station.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station The information about the access resources pre-configured by the UE and the uplink grant information pre-configured by the candidate secondary base station for the UE.
  • the sending unit is further configured to send a first indication message to the UE, where
  • the first indication message is used to indicate a handover trigger condition for the UE to perform handover, and the handover trigger condition includes at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; The signal quality of the first candidate secondary base station in the at least one candidate secondary base station is higher than a second threshold; the load of the secondary base station currently accessed by the UE is higher than a third threshold; and the second of the at least one candidate secondary base station The signal quality of the candidate secondary base station is lower than the fourth threshold.
  • the determining unit is further configured to use the at least one candidate secondary base station Determining, by the current state information of each candidate secondary base station, priority information of each candidate secondary base station in the at least one candidate secondary base station; the sending unit is further configured to send the at least one candidate secondary base station to the UE Priority information of each candidate secondary base station, so that the UE preferentially switches to the target secondary in the at least one candidate secondary base station according to priority information of each candidate secondary base station in the at least one candidate secondary base station Base station.
  • the determining unit is further configured to determine the UE and the target auxiliary The access process is completed between the base stations; the sending unit is further configured to send data to the target secondary base station, so that the UE and the target secondary base station perform data transmission.
  • the network device further includes: a first receiving unit, where the first receiving unit is configured to receive a second indication message sent by the UE, where the second indication message is used to indicate that the UE successfully accesses The target secondary base station; and/or the second receiving unit is configured to receive a third indication message sent by the target secondary base station, where the third indication message is used to indicate that the UE successfully accesses the target secondary base station .
  • the network device is a small station controller, and the network device further includes a second receiving unit, configured to receive a measurement report of the UE sent by the primary base station, where the measurement report includes a measurement result of the UE to multiple secondary base stations; the determining unit is further configured to: Determining the at least one candidate secondary base station from the plurality of secondary base stations according to the measurement report.
  • the present invention provides a user equipment, including: a receiving unit, configured to receive configuration information of each candidate secondary base station in at least one candidate secondary base station that is sent by a network device, where the at least one candidate secondary base station Each of the candidate secondary base stations has completed the path switching preparation and waits for the UE to select it as the target secondary base station, and the path switching preparation includes at least one of the following: pre-configuring the access resources for the UE, and the network Establishing a data transmission channel between the devices; the switching unit, where the switching unit is configured to switch, according to configuration information of each candidate secondary base station in the at least one candidate secondary base station, to the at least when the secondary base station handover needs to be performed by the UE A target secondary base station in a candidate secondary base station.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station The information about the access resources pre-configured by the UE and the uplink grant information pre-configured by the candidate secondary base station for the UE.
  • the receiving unit is further configured to receive the first indication message sent by the network device And determining, according to the first indication message, that the UE needs to perform a secondary base station handover, where the first indication message is used to indicate a handover trigger condition when the UE performs handover, and the trigger condition includes at least one of the following conditions: The signal quality of the secondary base station currently accessed by the UE is lower than the first threshold; the signal quality of the first candidate secondary base station in the at least one candidate secondary base station is higher than the second threshold; The load of the secondary base station is higher than a third threshold; and the load of the second candidate secondary base station of the at least one candidate secondary base station is lower than a fourth threshold.
  • the unit is specifically configured to: receive a second indication message that is sent by the network device, where The second indication message carries priority information of each of the at least one candidate secondary base station; the target secondary base station is determined according to priority information of each of the at least one candidate secondary base station; the switching unit Specifically, the method is used to switch to the target secondary base station according to the second indication message and the configuration information of the target secondary base station.
  • the device further includes: a sending unit, where the sending unit is used to send to the network The device sends a measurement report of the UE, where the measurement report is used by the network device to determine the target secondary base station according to the measurement report, and the receiving unit is further configured to receive a third indication message of the network device, and Determining, according to the third indication message, that the UE needs to perform a secondary base station handover, where the third indication message is used to indicate that the UE is handed over to the target secondary base station.
  • the device further includes: a sending unit, where After the UE accesses the target secondary base station, the UE sends a fourth indication message to the network device, where the fourth indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • a network device including: a receiving unit, configured to receive an advance preparation indication information sent by a first network device, where the advance preparation indication information is used to instruct the network device to perform path switching preparation
  • the path switching preparation includes at least one of the following: pre-configuring an access resource for the user equipment UE, and establishing a data transmission channel corresponding to the UE with the first network device;
  • the advance preparation indication information is described, the path switching preparation is performed, and the UE is switched to the secondary base station.
  • the device further includes: a sending unit, where the sending unit sends an advance preparation completion message to the first network device, where the advance preparation is completed.
  • the message carries at least one of the following information: the information of the access resource pre-configured by the network device for the UE, and the general packet radio system tunneling protocol tunnel identifier GTP TEID allocated by the network device to the UE.
  • the sending unit is further configured to: when the UE successfully accesses the network device, The first network device sends indication information, where the indication information is used to indicate that the UE has successfully accessed the network device.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 1A is a schematic structural diagram of an application scenario of an embodiment of the present invention.
  • FIG. 1B is a schematic structural diagram of an application scenario of another embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for secondary base station handover according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for secondary base station handover according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for secondary base station handover according to another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a secondary base station handover according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a secondary base station handover according to another embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a network device according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a network device according to another embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of an apparatus of a network device according to an embodiment of the present invention.
  • FIG. 11 is a schematic block diagram of an apparatus of a network device according to another embodiment of the present invention.
  • Figure 12 is a schematic block diagram of an apparatus of a network device of another implementation of the present invention.
  • the user equipment (English: User Equipment, shorthand: UE), which may also be called a mobile terminal (Mobile Terminal), a mobile user equipment, etc., may be connected to a radio access network (for example, RAN, Radio Access Network) Or communicating with multiple core networks, which may be mobile terminals, such as mobile phones (or “cellular" phones) and computers with mobile terminals, for example, portable, pocket, handheld, computer built or In-vehicle mobile devices that exchange language and/or data with a wireless access network.
  • a radio access network for example, RAN, Radio Access Network
  • multiple core networks which may be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals, for example, portable, pocket, handheld, computer built or In-vehicle mobile devices that exchange language and/or data with a wireless access network.
  • the base station may be an evolved base station (eNB or e-NodeB, evolutional Node B) in a Long Term Evolution (LTE) system, or may be a universal mobile telecommunications system (English: Universal Mobile)
  • the Telecommunication System (abbreviated as UMTS)
  • the radio network controller (English: Radio Network Controller, RNC for short) may be an emerging base station in the 5G system, and the present invention is not limited thereto.
  • FIG. 1A and FIG. 1B are schematic structural diagrams of application scenarios according to an embodiment of the present invention.
  • the system architecture adopts a multi-connection technology of LTE and 5G new systems, wherein a macro base station in an LTE system serves as a primary base station (English: Master eNB, abbreviated MeNB) to provide coverage and mobility, and a 5G new system.
  • the cell serves as a secondary base station (English: Secondary eNB, abbreviated: SeNB) to increase system capacity.
  • the macro base station and the 5G new system station are connected through the Xn interface.
  • the user plane protocol stack includes a packet data convergence protocol (English: Packet Data Convergence Protocol, PDCP) layer, a radio link control (English: Radio Link Control, shorthand: RLC) layer, and media intervention control ( English: Media Access Control (abbreviation: MAC) layer, the PDCP layer in the user plane is located at the primary base station, and the PDCP protocol data unit (English: PDCP Protocol Data Unit, shorthand: PDCP PDU) is transmitted between the Xn interface and the secondary base station.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • media intervention control English: Media Access Control (abbreviation: MAC) layer
  • the system architecture is also a multi-connection technology of LTE and 5G new systems, wherein the 5G new system cell is uniformly managed by the small station controller, and the LTE macro base station is used as the primary base station to control through the Xn interface and the small station.
  • the user plane protocol stack includes a PDCP layer, an RLC layer, and a MAC layer, and the primary base station and the small station controller communicate through the Xn interface, where the PDCP layer can be located in the small station controller, for example, the primary base station transmits the data packet.
  • the small station controller After being sent to the small station controller and processed by the PDCP layer of the small station controller, the small station controller sends the PDCP PDU to the 5G new station.
  • FIG. 2 is a schematic flowchart of a method for secondary base station handover according to an embodiment of the present invention.
  • the network device performing the method 200 may be a macro base station as a primary base station, or a small station controller for uniformly managing a 5G small base station. As shown in FIG. 2, the method 200 includes:
  • the network device sends the advance preparation indication information to each of the at least one candidate secondary base station, where the advance preparation indication information is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs path switching preparation.
  • the path switching preparation includes at least one of the following: pre-configuring the user equipment UE to access the resource, and establishing a data transmission channel with the network device.
  • the network device sends the configuration information of each candidate secondary base station in the at least one candidate secondary base station to the UE, so that the UE switches according to the configuration information of each candidate secondary base station in the at least one candidate secondary base station when the secondary base station handover needs to be performed.
  • the network device sends the advance preparation indication information to the at least one candidate secondary base station in the coverage area, where the advance preparation indication information may be carried in the addition request message, or may be carried in another request message, the at least one The candidate secondary base stations may form a candidate secondary base station cluster.
  • the invention is not limited thereto.
  • the advance preparation indication information is used to indicate that each candidate secondary base station that receives the information prepares to communicate with the UE in advance, so that each candidate base station of the at least one candidate secondary base station waits for the UE to select it as a target.
  • the secondary base station or alternatively, so that when the UE has a handover requirement, each candidate secondary base station of the at least one candidate secondary base station is ready for handover.
  • the path switching preparation performed by the candidate secondary base station that receives the advance preparation indication information includes: allocating and reserving resources for the UE in advance, so that the UE can quickly switch to the candidate secondary base station autonomously, for example, assigning a random access parameter preamble, etc.
  • the candidate secondary base station needs to establish a data channel between the network device and the secondary base station in advance, for example, a general packet radio system tunneling protocol user plane (English: General Packet Radio System (GPRS)) Tunnelling Protocol User Plane (GTP-U) data channel, that is, the network device and the secondary base station respectively assign the respective general packet radio system tunnel protocol tunnel identifier to the data channel (English: General Packet Radio System (GPRS) Tunnelling Protocol User Tunelling Identity, referred to as GTP TEID), and sent to the
  • step 220 when the network device is the primary base station, the primary base station directly sends the configuration information of each candidate secondary base station in the at least one candidate secondary base station to the UE, so that the UE is configured according to at least one The configuration information of the target secondary base station in the candidate secondary base station performs path switching.
  • the network device is the small station controller
  • the small station controller may send configuration information of each candidate secondary base station in the at least one candidate secondary base station to the UE by using the primary base station. .
  • the UE determines the candidate base station of the at least one candidate secondary base station as the target secondary base station, accessing the target secondary base station according to the handover preparation information that has been completed by each candidate secondary base station, for example, the UE uses the storybook preparation system.
  • the incoming resource is accessed to the target secondary base station.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station may be carried in a Radio Resource Control (English: Radio Resource Control, RRC) connection reconfiguration message of the configuration information of each secondary base station. It may be carried in other request messages, and the invention is not limited thereto.
  • RRC Radio Resource Control
  • the UE when the UE needs to be handed over, the UE meets the following actions: the UE receives the handover command of the primary base station, satisfies the handover triggering condition of the UE according to the configuration, and satisfies the handover that the primary base station sends to the UE. Triggering conditions. It should be understood that the condition that the UE needs to be handed over may be any condition that can instruct the UE to perform the secondary base station handover, and the present invention is not limited thereto.
  • the target secondary base station in the at least one candidate secondary base station may refer to any one of the at least one candidate secondary base station, and the UE may select or select the target secondary base station according to the indication of the network device, and switch to the target secondary base station.
  • the action of the foregoing secondary base station handover may refer to an initial access action when the UE first accesses the cell, and may also refer to a handover action between the UEs covered by the primary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent. question.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station is an access resource pre-configured by the UE The information and each candidate secondary base station are uplink authorization information pre-configured by the UE.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station may further include at least one of the following: identification information of each candidate secondary base station and each candidate secondary base station The UE identity assigned to the UE.
  • the UE when the UE is to access the target secondary base station, the UE needs to use the identifier information of the target candidate secondary base station and the UE identifier allocated by the target secondary base station for the UE, and the target secondary base station is the information and target selection of the access resource pre-configured by the UE.
  • the secondary base station is configured to access the target secondary base station by using at least one of the information of the uplink authorization information that is pre-configured by the secondary device, and the other information that is used for accessing the target secondary base station by the UE also falls within the protection scope of the embodiment of the present invention.
  • the invention is not limited to this. Therefore, when the UE needs to perform handover of the secondary base station, the UE may directly switch to the target secondary base station in the at least one candidate secondary base station according to the configuration information.
  • the method further includes: sending, to the UE, a first indication message, where the first indication message is used to indicate a handover trigger condition for the UE to perform handover, where the handover trigger condition includes at least one of the following conditions: The signal quality of the secondary base station currently accessed by the UE is lower than the first threshold; the signal quality of the first candidate secondary base station in the at least one candidate secondary base station is higher than the second threshold; a third threshold; a signal quality of the second candidate secondary base station of the at least one candidate secondary base station is lower than a fourth threshold.
  • the network device sends a handover trigger condition to the UE, and the UE determines, according to the trigger condition, whether the handover of the secondary base station needs to be performed, for example, the signal quality of the candidate secondary base station is higher than that of the at least one candidate secondary base station that completes the path handover preparation.
  • the signal quality of the secondary base station currently accessed by the UE is lower than a certain threshold; for example, when the load of the candidate secondary base station in the at least one candidate secondary base station that completes the path switching preparation is less than a certain threshold, the secondary base station currently accessed by the UE When the load is above a certain threshold.
  • first candidate secondary base and the second candidate secondary base station are any one of the at least one candidate secondary base station, and the first candidate secondary base station and the second candidate secondary base station may be the same or different. It should also be understood that the handover trigger condition of the station may be carried in the RRC connection reconfiguration message or may be carried in other possible messages, and the present invention is not limited thereto.
  • the foregoing at least one candidate auxiliary base is sent to the UE.
  • the method further includes: determining priority information of each candidate secondary base station in the at least one candidate secondary base station according to current state information of each candidate secondary base station in the at least one candidate secondary base station; Transmitting, to the UE, priority information of each candidate secondary base station in the at least one candidate secondary base station, so that the UE preferentially switches to the at least one candidate secondary base station according to the priority information of each candidate secondary base station in the at least one candidate secondary base station.
  • Target secondary base station is determining priority information of each candidate secondary base station in the at least one candidate secondary base station according to current state information of each candidate secondary base station in the at least one candidate secondary base station.
  • the current state information of each candidate secondary base station includes power information, load conditions, and the like of each candidate secondary base station, and the present invention is not limited thereto.
  • the network device may determine, according to the measurement report reported by the UE, the target secondary base station that the UE preferentially accesses, and send the indication information indicating that the UE preferentially cuts to the target secondary base station, and send the indication information to the UE, so that the UE preferentially cuts in to the UE according to the indication information.
  • the target secondary base station may determine the priority of each candidate secondary base station according to the measurement report reported by the UE and the load condition of each candidate secondary base station, and send the priority information to the UE, so that the UE can be based on the priority
  • the information determines the target secondary base station that is first cut.
  • the network device may display the target secondary base station indicating that the UE first switches by sending the name of the cell in the message, or may indicate the priority of the at least one candidate secondary base station in an implicit manner, so that the UE determines the target secondary base station, which should be understood. Any method of notifying the UE of the priority information of the at least one candidate secondary base station may be implemented, and the present invention is not limited thereto.
  • the method further includes: receiving a first measurement report sent by the UE, according to the first measurement Reporting, the target secondary base station is determined from the at least one candidate secondary base station; the fourth indication information is sent to the UE, and the fourth indication information is used to indicate that the UE is handed over to the target secondary base station.
  • the network device determines, according to the measurement report and the like sent by the UE, whether to activate a new secondary base station, that is, the target secondary base station. If it is decided to activate the target secondary base station, the activation command is sent to the UE, and the activation command includes the target secondary base station identifier to be activated, and may also include deactivating the original secondary base station command. After receiving the activation command, the UE may trigger a synchronization and access procedure to access the target secondary base station. It should be understood that the UE may also complete the process of accessing each candidate secondary cell in advance, and after receiving the activation command, directly send the uplink data to the new target secondary base station. It should also be understood that the network device may dynamically determine the target secondary base station according to information such as the measurement report of the UE, and instruct the UE to switch to the newly determined target secondary base station.
  • the method further includes: determining that an access procedure is completed between the UE and the target secondary base station; and transmitting data to the target secondary base station, so that the UE performs data transmission with the target secondary base station.
  • the network device determines that the UE successfully accesses the target secondary base station
  • the data that is required by the subsequent UE and/or the data that the UE does not transmit successfully to the secondary base station that is originally transmitted by the UE is sent to the target secondary base station, so that The UE acquires subsequent data through the target secondary base station.
  • the determining that the UE completes the access process with the fourth secondary base station includes: receiving a second indication message sent by the UE, where the second indication message is used to indicate that the UE successfully accesses the target secondary base station. And/or receiving a third indication message sent by the target secondary base station, where the third indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • a possible implementation manner is: after successfully accessing the target secondary base station, the UE sends an indication message to the primary base station, where the indication message may be that the target secondary base station is successfully accessed.
  • the PDCP status report of the information may also be other messages carrying the successful access information of the target secondary base station, and the present invention is not limited thereto.
  • the primary base station determines that the UE has successfully accessed the target secondary base station, and then sends the subsequent new data and/or the data that is successfully transmitted by the secondary base station that the UE originally accesses to the target secondary base station.
  • the target secondary base station sends an indication message to the primary base station, where the indication message includes indication information that the UE successfully accesses the target secondary base station, which should be understood.
  • the indication information may be carried in a data frame, for example, may be carried in a data frame in a GTP-U extension header, and the present invention is not limited thereto.
  • the primary base station determines that the UE has successfully accessed the target secondary base station, and then sends the subsequent new data and/or the data that is successfully transmitted by the secondary base station that the UE originally accesses to the target secondary base station.
  • the UE when the network device is a small station controller, after successfully accessing the target secondary base station, the UE sends an indication message to the primary base station, where the indication message may be a PDCP status report that increases the successful access information of the target secondary base station. Other messages that increase the successful access information of the target secondary base station may also be carried, and the present invention is not limited thereto.
  • the primary base station After receiving the message, the primary base station forwards the message to the small station controller. After receiving the message, the small station controller determines that the UE has successfully accessed the target secondary base station, and then the subsequent new data and/or the UE.
  • the secondary base station that is originally accessed is the data that is successfully transmitted and sent to the target secondary base station.
  • Another possible implementation manner is: after the UE successfully accesses the target secondary base station, the target secondary base station sends an indication message to the small station controller, where the indication message includes indication information that the UE successfully accesses the target secondary base station, which should be understood.
  • the indication information may be carried in a data frame, for example, may be carried in a data frame in a GTP-U extension header, and the present invention is not limited thereto.
  • the small station controller determines that the UE has successfully accessed the target secondary base station, and then sends the subsequent new data and/or the data that is successfully transmitted by the secondary base station that the UE originally accesses to the target secondary base station. .
  • the small station controller includes a first RRC (Radio Resource Control, Radio Resource Control, RRC for short) sublayer and a first PDCP (Packet Data Convergence Protocol, PDCP) sublayer corresponding function.
  • the secondary base station includes a second RRC sublayer, a second PDCP sublayer, an RLC (Radio Link Control, Radio Link Control, RLC) layer, a MAC (Media Access Control, Medium Access Control, MAC) layer, and a PHY ( a function corresponding to the physical, physical, or PHY) layer, where the first RRC sublayer and the second RRC sub-combination together form an RRC layer, and the function of the first RRC sublayer is used for global RRC configuration management, and the second RRC sub- The function of the layer is for the generation, transmission, reception and local RRC configuration management of SRB (Signaling Radio Bearers, SRB for short).
  • the function of the first PDCP sublayer is for Data Radio Bearers (Data Radio Bearers).
  • the processing of the bearer referred to as DRB
  • the function of the second PDCP sublayer is the processing for the SRB.
  • the small station controller includes an RRC layer and a PDCP layer, which are used to complete functions corresponding to the RRC layer and the PDCP layer;
  • the secondary base station includes an RLC layer, a MAC layer, and a PHY layer, and is used to complete the RLC layer, the MAC layer, and The function corresponding to the PHY layer.
  • the functions corresponding to the PDCP layer include: header compression, security, and reordering; the functions corresponding to the RLC layer include splitting, cascading, and automatic repeat request (ARQ); the corresponding functions of the MAC layer include: scheduling, Logical channel priority processing, HARQ (Hybrid Automatic Repeat Request), etc.; PHY layer corresponding functions include: modulation and demodulation, coding, multi-antenna mapping. For example, after receiving the data sent by the primary base station, the small station controller generates a PDCP PDU after completing the PDCP function of the service data, performs header compression on the PDCP PDU, and encrypts the PDCP PDU according to the encryption algorithm and the encryption key.
  • the PDCP PDU is added with a sequence number, and the RC sends the PDCP PDU to the secondary base station, and the secondary base station completes the functions corresponding to the RLC layer, the MAC layer, and the PHY layer of the PDCP PDU.
  • the network device is a small station controller
  • the method further includes: receiving, by the primary base station, the UE And a measurement report, where the measurement report includes a measurement result of the UE to the multiple secondary base stations; and determining, according to the measurement report, at least one candidate secondary base station from the multiple secondary base stations.
  • the primary base station determines, according to the measurement report reported by the UE, that at least one candidate secondary base station can serve as a candidate secondary base station for the path handover of the UE, and the measurement report reported by the UE includes the power of multiple secondary base stations. Based on the information, the primary base station can determine, based on the information, the candidate secondary base station for the UE to perform path switching.
  • the primary base station when the network device is a small station controller, the primary base station first receives the measurement report reported by the UE, where the measurement report includes the measurement result of the UE to the multiple secondary base stations and/or the service information of the UE, and the primary base station receives the UE. After the measurement report, it is decided to add the secondary base station to offload the data, and then send a secondary base station increase request message to the small station controller, where the secondary base station increase request message includes the measurement report reported by the UE, and therefore, the small station controller receives the increase. After the request message, according to the measurement report of the UE carried in the message, it is determined that at least one candidate secondary base station can be used as a candidate secondary base station for performing path handover by the UE.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 3 is a schematic flowchart of a method for secondary base station handover according to another embodiment of the present invention.
  • the executor of the method 300 may be a user equipment UE, including:
  • the user equipment UE receives configuration information of each candidate secondary base station in the at least one candidate secondary base station that is sent by the network device, and each candidate secondary base station in the at least one candidate secondary base station has completed path switching preparation, where the path switching preparation includes the following At least one of: pre-configuring an access resource for the UE, and establishing a data transmission channel with the network device.
  • the UE When the UE needs to perform the secondary base station handover, the UE switches to the target secondary base station in the at least one candidate secondary base station according to the configuration information of each candidate secondary base station in the at least one candidate secondary base station.
  • each candidate secondary base station in the at least one candidate secondary base station has completed the path switch preparation, and waits for the UE to select it as the target secondary base station, so as to be able to directly switch to the target when the UE has the handover requirement.
  • Secondary base station
  • the UE receives the reconfiguration message sent by the primary base station, where the message carries configuration information of each candidate secondary base station in the at least one candidate secondary base station, where the at least one candidate secondary base station can be connected to the UE.
  • the candidate secondary base station, the candidate secondary base station of the at least one candidate secondary base station is the target secondary base station.
  • the target secondary base station may be selected by the network device to notify the UE to switch to the selected target secondary base station, or may be determined by the UE from the at least one candidate secondary base station.
  • the foregoing reconfiguration message may be an RRC connection reconfiguration message carrying configuration information of each secondary base station, or may be other configuration information carrying each secondary base station.
  • the request message the invention is not limited thereto.
  • the primary base station receives configuration information of each of the at least one secondary base station determined by the small station controller, and sends the configuration information to the UE by using a reconfiguration message.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station is information about access resources pre-configured by the UE. Each candidate secondary base station is uplink authorization information pre-configured by the UE.
  • the configuration information of each candidate secondary base station in the at least one candidate secondary base station may further include at least one of the following: identification information of each candidate secondary base station and each candidate secondary base station The UE identity assigned to the UE.
  • the UE when the UE is to access the target secondary base station, the UE needs to use the identifier information of the target candidate secondary base station and the UE identifier allocated by the target secondary base station for the UE, and the target secondary base station is the information and target selection of the access resource pre-configured by the UE.
  • the secondary base station is configured to access the target secondary base station by using at least one of the information of the uplink authorization information that is pre-configured by the secondary device, and the other information that is used for accessing the target secondary base station by the UE also falls within the protection scope of the embodiment of the present invention.
  • the invention is not limited to this. Therefore, when the UE needs to perform handover of the secondary base station, the UE may directly switch to the target secondary base station in the at least one candidate secondary base station according to the configuration information.
  • the method further includes: receiving a first indication message sent by the network device, and determining, according to the first indication message, that the UE needs to perform a secondary base station handover, where the first indication message is used to instruct the UE to perform
  • the handover triggering condition at the time of the handover includes at least one of the following conditions: the signal quality of the secondary base station currently accessed by the UE is lower than the first threshold; and the signal quality of the first candidate secondary base station of the at least one candidate secondary base station is high And a second threshold; a load of the secondary base station currently accessed by the UE is higher than a third threshold; and a load of the second candidate secondary base station of the at least one candidate secondary base station is lower than a fourth threshold.
  • the UE receives the network device to send a handover trigger condition, and the UE determines according to the trigger condition. Whether the signal quality of the candidate secondary base station is higher than a certain threshold in the at least one candidate secondary base station in which the path switching preparation is completed, and the signal quality of the secondary base station currently accessed by the UE is lower than a certain threshold; For example, when the load of the candidate secondary base station is less than a certain threshold in the at least one candidate secondary base station that completes the path switching preparation, and the load of the secondary base station currently accessed by the UE is higher than a certain threshold.
  • first candidate secondary base and the second candidate secondary base station are any one of the at least one candidate secondary base station, and the first candidate secondary base station and the second candidate secondary base station may be the same or different. It should also be understood that the handover trigger condition of the station may be carried in the RRC connection reconfiguration message or may be carried in other possible messages, and the present invention is not limited thereto.
  • the UE when the UE needs to perform the secondary base station handover, the UE switches to the target secondary base station in the at least one candidate secondary base station according to the configuration information of each candidate secondary base station in the at least one candidate secondary base station.
  • the method includes: receiving, by the network device, a second indication message, where the second indication message carries priority information of each of the at least one candidate secondary base station; and determining, according to priority information of each of the at least one candidate secondary base station And the target secondary base station; according to the second indication message and the configuration information of the target secondary base station, to the target secondary base station.
  • the network device may determine, according to the measurement report reported by the UE, the target secondary base station that the UE preferentially accesses, and send the indication information indicating that the UE preferentially cuts to the target secondary base station, and the UE sends the indication information to the UE.
  • the priority information is preferentially cut into the target secondary base station according to the indication information.
  • the network device may determine the priority of each candidate secondary base station according to the measurement report reported by the UE, and send the priority information to the UE.
  • the target secondary base station that is first cut is determined according to the priority information.
  • the network device may display the target secondary base station indicating that the UE first switches by sending the name of the cell in the message, or may indicate the priority of the at least one candidate secondary base station in an implicit manner, so that the UE determines the target secondary base station, which should be understood. Any method of notifying the UE of the priority information of the at least one candidate secondary base station may be implemented, and the present invention is not limited thereto.
  • the method further includes: transmitting, to the network device, a measurement report of the UE, where the measurement The report is used by the network device to determine the target secondary base station, receive the third indication message of the network device, and determine, according to the third indication message, that the UE needs to perform the secondary base station handover, and the third indication message is used to indicate that the UE switches to the target secondary base station. .
  • the network device determines, according to the measurement report sent by the UE, whether to activate one.
  • the new secondary base station the target secondary base station. If it is decided to activate the target secondary base station, the activation command is sent to the UE, and the activation command includes the target secondary base station identifier to be activated, and may also include deactivating the original secondary base station command.
  • the UE determines that the secondary base station handover needs to be performed, and the UE triggers the synchronization and access procedure to access the target secondary base station. It should be understood that the UE may also complete the process of accessing each candidate secondary cell in advance, and after receiving the activation command, directly send the uplink data to the new target secondary base station.
  • the network device may dynamically determine the target secondary base station according to information such as the measurement report of the UE, and instruct the UE to switch to the newly determined target secondary base station.
  • the method further includes: after accessing the target secondary base station, the UE sends a fourth indication message to the network device, where the fourth indication message is used to indicate that the UE successfully accesses the target secondary base station. .
  • a possible implementation manner is: after successfully accessing the target secondary base station, the UE sends an indication message to the primary base station, where the indication message may be that the target secondary base station is successfully accessed.
  • the PDCP status report of the information may also be another message carrying the information about the successful access of the target secondary base station.
  • the invention is not limited to this; when the network device is a small station controller, the primary base station forwards the receiving indication message to the small station control. Device.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 4 is a method for a secondary base station handover according to an embodiment of the present invention, which may be performed by a 5G small base station. As shown in FIG. 4, the method 400 includes:
  • the secondary base station receives the advance preparation indication information sent by the network device, where the advance preparation indication information is used to indicate that the secondary base station performs the path switching preparation, where the path switching preparation includes at least one of the following: pre-configuring the access resource for the user equipment UE. And establishing a data transmission channel corresponding to the UE with the network device;
  • the secondary base station pre-configures the access resource for the UE, and establishes a data transmission channel corresponding to the UE with the network device, and waits for the UE to switch to the secondary base station, so that When the UE has a switching requirement, it can directly switch to the auxiliary The base station does not need to prepare for path switching, thereby reducing the time required for handover.
  • the secondary base station prepares to communicate with the UE in advance, and the path switching preparation performed by the candidate secondary base station that receives the advance preparation indication information includes: starting resource allocation before the UE establishes the access, for example, allocating a random access parameter preamble, UE Cell temporary identifier, etc., and reserve the resource to the UE for a period of time (for example, may be 1 minute), waiting for access by the UE; and further, in order to complete subsequent data path switching with the UE, The candidate secondary base station needs to establish a data channel between the network device and the secondary base station in advance, for example, a GTP-U data channel, that is, the network device and the secondary base station respectively assign respective GTP TEIDs to the data channel, and send them to the other party.
  • a GTP-U data channel for example, a GTP-U data channel, that is, the network device and the secondary base station respectively assign respective GTP TEIDs to the data channel, and send them to the other party.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • the method further includes: sending an advance preparation completion message to the network device, where the advance preparation completion message carries at least one of the following information: the information of the access resource pre-configured by the secondary base station for the UE, and the auxiliary information The TEID assigned by the base station to the UE.
  • the secondary base station needs to send the information about the access resources pre-configured by the secondary base station to the UE to the network device, so that the network device sends the configuration information to the UE for access, and the TEID allocated by the secondary base station to the UE is used for the UE connection.
  • the path switching is completed quickly after entering the secondary base station.
  • the method further includes: when the UE successfully accesses the secondary base station, the secondary base station sends the indication information to the network device, where the indication information is used to indicate that the UE has successfully accessed the secondary base station.
  • the secondary base station After the UE successfully accesses the secondary base station, the secondary base station sends an indication message to the network device, where the indication message includes the indication information that the UE successfully accesses the secondary base station, and the indication information includes the identifier information of the secondary base station. It should be understood that the indication information may be carried in a data frame, for example, may be carried in a data frame in a GTP-U extension header, or may be carried in other indication messages, and the present invention is not limited thereto.
  • the network device After receiving the message, the network device determines that the UE has successfully accessed the new secondary base station, and then sends the subsequent new data and/or the data that is successfully transmitted by the secondary base station that the UE originally accesses to the new secondary base station. .
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 2 to FIG. 4 a method for switching between secondary base stations according to an embodiment of the present invention is described in detail from the perspective of a network device and a user equipment, and the following is an angle of interaction from each device in conjunction with FIG. 5 to FIG. A method for secondary base station handover in accordance with an embodiment of the present invention is described.
  • FIG. 5 is a schematic flowchart of a secondary base station handover according to an embodiment of the present invention. This embodiment can be applied to the network structure scenario shown in FIG. 1A. As shown in FIG. 5, the method includes the following steps:
  • the primary base station MeNB determines, according to the measurement report reported by the user equipment UE, at least one candidate secondary base station, where the at least one candidate secondary base station includes a target secondary base station and other candidate secondary base stations selected by the primary base station.
  • the primary base station sends a secondary base station add request message to the 5G small base stations NODE1, NODE2, and NODE3, where the message carries an advance preparation indication, where the advance preparation indication is used to indicate that the secondary base station prepares in advance as the secondary base station, NODE1, NODE2, and NODE3.
  • the advance preparation indication is used to indicate that the secondary base station prepares in advance as the secondary base station, NODE1, NODE2, and NODE3.
  • each 5G small base station allocates resources for the UE, such as a random access parameter preamble, a cell temporary identifier of the UE, and the like.
  • the resource is reserved for the UE for a period of time, waiting for the UE to access; in order to complete the subsequent data path handover, the data channel of the primary base station and the candidate secondary base station needs to be established in advance in the candidate secondary base station addition process, that is, the GTP-U tunnel That is, the primary base station and the candidate secondary base station respectively allocate respective GTP TEIDs to the bearers, and send them to the other party for maintenance.
  • the primary base station sends an RRC connection reconfiguration message to the UE, where the message includes configuration information of the selected target secondary base station and the candidate secondary base station.
  • the selected target secondary base station may be a candidate secondary base station that the UE first accesses.
  • the RRC connection reconfiguration message may include a condition that the secondary base station changes, that is, a condition that the UE may trigger the secondary base station handover: if the signal quality of the secondary base station accessed by the current UE is selected to be lower than a certain threshold, and the candidate secondary base station exists The signal quality of the secondary base station is higher than a certain threshold, and the load of the secondary secondary base station is lower than a certain threshold, and the load of the secondary secondary base station is lower than a certain threshold.
  • the connection reconfiguration message may indicate, according to which handover policy, the UE switches to the new target secondary base station, for example, the RRC connection reconfiguration message may be displayed by using the name of the cell to distinguish the selected target secondary base station from other candidate secondary base stations; It can be distinguished in an implicit manner, for example, the first one located in the base station list is the selected target secondary base station, followed by the candidate secondary base station, and for example, the primary base station can also provide the priority of the candidate secondary base station in the RRC connection reconfiguration message. Instructing the UE to preferentially access a certain candidate secondary base station according to the priority of each candidate secondary base station.
  • the UE accesses the small base station Node1. Specifically, the UE initiates an access procedure according to the access resource in the configuration information, and accesses the target secondary base station. And obtaining the uplink time in the random access process; optionally, the UE may not initiate random access.
  • the target secondary base station identifies the UE by a preamble or a cell temporary identifier of the UE allocated in advance.
  • the indication information that the UE successfully accesses the target secondary base station may be sent to the primary base station.
  • the UE sends a PDCP status report to the primary base station, and the PDCP status report adds an indication of the new secondary base station.
  • the primary base station receives the indication of the new secondary base station, and considers that the UE has successfully accessed the new secondary base station, the subsequent new data and/or the data that was not successfully transmitted by the primary secondary base station are sent to the new secondary base station. .
  • the target secondary base station NODE1 may send indication information to the primary base station, indicating that the UE successfully accesses NODE1.
  • the new target secondary base station sends an indication to the primary base station, and the indication may be included in the data frame, that is, one bit is added to the data frame in the GTP-U extension header.
  • the indication indicates that the UE has successfully accessed the new target secondary base station, so that after the primary base station receives the indication that the UE accesses the new target secondary base station, it is considered that the UE has successfully accessed the new target secondary base station, and then Subsequent new data and/or data that has not been successfully transmitted in the original secondary base station are sent to the new target secondary base station.
  • the primary base station determines that the UE successfully accesses the target secondary base station, the primary base station stops sending data to the original secondary base station that the UE previously accesses, and starts sending data to the target secondary base station NODE1.
  • the primary base station determines that the UE successfully accesses the target secondary base station, the data is to be switched from the original secondary base station previously accessed by the UE to the target secondary base station NODE1.
  • the data transmission between the UE and the target secondary base station NODE1 completes the path switching process, and the process further includes deactivating the original secondary base station that is accessed before the UE.
  • the SeNB changes the condition, if the UE detects that the signal quality of the secondary base station accessed by the current UE is lower than a certain threshold, and the signal quality of the candidate secondary base station NODE2 is higher than a certain threshold, the UE determines the candidate.
  • the secondary base station NODE2 is a new target secondary base station.
  • the UE After receiving the NODE2 configuration information, the UE autonomously triggers the synchronization and access procedure, and accesses the new target secondary base station.
  • the target secondary base station NODE2 may send indication information to the primary base station, indicating that the UE successfully accesses NODE2.
  • the primary base station determines that the UE successfully accesses the target secondary base station NODE2, the data is switched from the original secondary base station NODE1 previously accessed by the UE to the new target secondary base station NODE2.
  • the primary base station determines that the UE successfully accesses the target secondary base station NODE2
  • the data is to be handed over from the original secondary base station that the UE previously accesses to the target secondary base station.
  • the primary base station deactivates the primary secondary cell NODE1.
  • the MeNB quickly indicates the activation/deactivation of the candidate secondary base station, that is, the target secondary base station determines the target secondary base station, and the difference between the manner and the foregoing method is:
  • the MeNB does not need to deliver the conditions changed by the secondary base station to the UE.
  • the UE reports the measurement report.
  • the primary base station MeNB determines whether to activate a new target secondary base station according to the information such as the measurement report, and if yes, sends an activation command to the UE, where the activation command includes the target secondary base station identifier to be activated, and may also include deactivating the primary secondary base station.
  • Base station command After receiving the activation command, the UE may trigger a synchronization and access procedure to access the target secondary base station. The UE may also complete the process of accessing each candidate secondary cell in advance, and after receiving the activation command, directly send uplink data in the new secondary cell.
  • the primary base station may also correspond to the foregoing process. For brevity, details are not described herein again.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can drop Low due to the small coverage of the secondary base station in the network, and the mobility deterioration caused by frequent cell handover.
  • FIG. 6 is a schematic flowchart of a secondary base station handover according to another embodiment of the present invention. This embodiment can be applied to the network architecture scenario shown in FIG. 1B. As shown in FIG. 6, the method includes the following steps:
  • the primary base station MeNB determines to increase the secondary base station to use the downlink data to send the secondary base station controller (English: Small Cell Controller) according to the measurement result reported by the UE and the service information of the UE.
  • the request message includes measurement and/or service information, and after receiving the message, the small station controller selects the secondary base station and the candidate secondary base station according to the included measurement or ⁇ and service information.
  • the small station controller determines, according to the measurement result reported by the UE and the service information of the UE, the at least one candidate secondary base station, where the at least one candidate secondary base station includes the selected target secondary base station and other candidate secondary base stations.
  • the small station controller sends a secondary base station addition request message to the 5G small base stations NODE2 and NODE3, where the message carries the advance preparation indication information, where the advance preparation indication information is used to indicate that the secondary base station prepares in advance as the secondary base station, NODE2 and NODE3.
  • Each of the candidate base stations waits for the UE to select the target secondary base station.
  • the candidate secondary base station allocates resources required for random access, such as a random access parameter preamble, and may reserve in a period of time. The resource is given to the UE, waiting for the UE to access.
  • the data channel of the primary base station and the candidate secondary base station needs to be established in advance in the supplementary process of the secondary base station, that is, the GTP-U tunnel, and the small station controller and the secondary base station respectively allocate respective GTP TEIDs to the bearers. And send it to the other party to keep.
  • the small station controller sends an RRC connection reconfiguration message to the UE, where the message includes configuration information of the selected target secondary base station and the candidate secondary base station, where the selected target secondary base station may be the first access by the UE.
  • Secondary base station may include a condition that the secondary base station changes, that is, a condition that the UE may trigger the secondary base station handover: if the signal quality of the secondary base station currently accessed by the UE is lower than a certain threshold, and other candidate secondary base stations exist.
  • the signal quality is higher than a certain threshold; for example, the load of the secondary base station currently accessed by the UE is higher than a certain threshold, and the load of the candidate secondary base station is lower than a certain threshold.
  • the message may be displayed by using the name of the cell to distinguish between the selected secondary base station and the candidate secondary base station; or may be distinguished by implicit means, such as the first one located in the base station list is the selected target secondary base station, which is ranked later. It is a candidate secondary base station.
  • the priority information of the candidate secondary base station may also be carried in the message, and is used to indicate that the UE accesses a candidate secondary base station according to the priority information.
  • the UE When the target secondary base station selected by the primary base station is NODE2, the UE establishes a random access channel with the NODE2.
  • the indication information that the UE successfully accesses the target secondary base station NODE2 may be sent to the primary base station.
  • the UE sends a PDCP status report to the primary base station, and the PDCP status report adds an indication of the new secondary base station.
  • the primary base station receives the indication of the new secondary base station, and considers that the UE has successfully accessed the new secondary base station, the subsequent new data and/or the data that was not successfully transmitted by the primary secondary base station are sent to the new secondary base station. .
  • the primary base station may send the indication information that the UE successfully accesses the target secondary base station, and the primary base station forwards the indication information that the UE successfully accesses the target secondary base station NODE2 to the small station controller. .
  • the target secondary base station NODE2 may send indication information to the small station controller, indicating that the UE successfully accesses NODE2.
  • the new secondary base station sends an indication to the small station controller, where the indication may be included in the data frame, that is, an indication is added to the data frame in the GTP-U extension header. Instructing the UE to successfully access the new target secondary base station, so that after the primary base station receives the indication of the new target secondary base station, and considers that the UE has successfully accessed the new secondary base station, the subsequent new data and/or the original secondary The data that the base station does not transmit successfully is sent to the new target secondary base station.
  • the primary base station determines that the UE successfully accesses the target secondary base station, the primary base station stops transmitting data to the original secondary base station that the UE previously accesses, and starts sending data to the target secondary base station NODE, 2.
  • the primary base station determines that the UE successfully accesses the target secondary base station, the data is to be switched from the original secondary base station previously accessed by the UE to the target secondary base station NODE2.
  • the data transmission between the UE and the target secondary base station NODE2 completes the path switching process, and the process further includes deactivating the original base station accessed before the UE.
  • the UE determines that the SeNB change condition is satisfied, for example, when the UE detects that the signal quality of the selected secondary base station is lower than a certain threshold, and the signal quality of the candidate secondary base station NODE3 is higher than a certain threshold, determining that the candidate secondary base station NODE2 is new.
  • Target secondary base station when the UE determines that the SeNB change condition is satisfied, for example, when the UE detects that the signal quality of the selected secondary base station is lower than a certain threshold, and the signal quality of the candidate secondary base station NODE3 is higher than a certain threshold, determining that the candidate secondary base station NODE2 is new.
  • the UE After receiving the NODE3 configuration information, the UE automatically triggers the synchronization and access procedure to access the new target secondary base station.
  • the target secondary base station NODE3 may send indication information to the primary base station, indicating that the UE successfully accesses NODE3.
  • the primary base station may send the indication information that the UE successfully accesses the target secondary base station, and the primary base station forwards the indication information that the UE successfully accesses the target secondary base station NODE3 to the small station controller.
  • the target secondary base station NODE3 sends the indication information that the UE successfully accesses the target secondary base station NODE3 to the small station controller.
  • the small station controller determines that the UE successfully accesses the target secondary base station NODE3, the data is switched from the original secondary base station NODE2 previously accessed by the UE to the new target secondary base station NODE3.
  • the primary base station determines that the UE successfully accesses the target secondary base station NODE3, the data is to be switched from the original secondary base station previously accessed by the UE to the target secondary base station NODE3.
  • the MeNB quickly indicates the activation/deactivation of the candidate secondary base station, that is, the target secondary base station determines the target secondary base station, and the difference between the manner and the foregoing method is:
  • the MeNB does not need to deliver the conditions changed by the secondary base station to the UE.
  • the UE reports the measurement report.
  • the small station controller MeNB determines whether to activate a new target secondary base station according to the measurement report and the like, and if yes, sends an activation command to the UE, where the activation command includes the target secondary base station identifier to be activated, and may also include deactivation.
  • the original secondary base station command After receiving the activation command, the UE may trigger a synchronization and access procedure to access the target secondary base station.
  • the UE may also complete the process of accessing each candidate secondary cell in advance, and after receiving the activation command, directly send uplink data in the new secondary cell.
  • the primary base station may also correspond to the foregoing process. For brevity, details are not described herein again.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 7 shows a network device used for secondary base station handover according to an embodiment of the present invention.
  • the network device 700 includes:
  • a determining unit 710 configured to send, to each of the at least one candidate secondary base station, advance preparation indication information, where the advance preparation indication information is used to indicate each candidate in the at least one candidate secondary base station
  • the base station performs path switching preparation, and the path switching preparation includes at least one of the following: pre-configuring the user equipment for accessing the resource, and establishing a data transmission channel with the network device.
  • a sending unit 720 configured to send, to each of the at least one candidate secondary base station, advance preparation indication information, where the advance preparation indication information is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs
  • the path switching preparation includes at least one of the following: pre-configuring the user equipment for accessing the resource, and establishing a data transmission channel with the network device.
  • the sending unit 720 is further configured to send, to the UE, configuration information of each candidate secondary base station in the at least one candidate secondary base station, so that the configuration information of each candidate secondary base station in the at least one candidate secondary base station is used when the UE needs to perform the secondary base station handover. Switching to a target secondary base station in the at least one candidate secondary base station.
  • the advance preparation indication information sent by the sending unit 720 is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs path switching preparation, so as to facilitate each candidate in the at least one candidate secondary base station.
  • the secondary base waits for the UE to select it as the target secondary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station is information about access resources pre-configured by the UE. Each candidate secondary base station is uplink authorization information pre-configured by the UE.
  • the sending unit 720 is further configured to send to the UE, as an embodiment of the present invention.
  • a first indication message the first indication message is used to indicate a handover trigger condition for the UE to perform handover, and the handover trigger condition includes at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; The signal quality of the first candidate secondary base station in the at least one candidate secondary base station is higher than a second threshold; the load of the secondary base station currently accessed by the UE is higher than a third threshold; and the second candidate secondary base station in the at least one candidate secondary base station The signal quality is below the fourth threshold.
  • the determining unit 710 is further configured to determine, according to current state information of each candidate secondary base station in the at least one candidate secondary base station, priority information of each candidate secondary base station in the at least one candidate secondary base station.
  • the second sending unit is further configured to send, to the UE, priority information of each candidate secondary base station in the at least one candidate secondary base station, so that the UE preferentially switches to the priority information of each candidate secondary base station in the at least one candidate secondary base station. a target secondary base station in the at least one candidate secondary base station.
  • the determining unit 710 is further configured to determine that an access procedure is completed between the UE and the target secondary base station, and the sending unit 720 is further configured to send data to the target secondary base station, so as to facilitate the UE and the target secondary.
  • the base station performs data transmission.
  • the network device 700 further includes: a first receiving unit, configured to receive a second indication message sent by the UE, where the second indication message is used to indicate that the UE successfully accesses the target And the second receiving unit is configured to receive the third indication message sent by the target secondary base station, where the third indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • the network device 700 is a small station controller, and the network device 700 further includes: a second receiving unit, where the second receiving unit is configured to receive a measurement report of the UE sent by the primary base station, where the measurement The report includes the measurement result of the UE to the multiple secondary base stations; the determining unit 710 is further configured to determine, according to the measurement report, the at least one candidate secondary base station from the multiple secondary base stations.
  • the network device 700 may correspond to an execution body of a method for switching a secondary base station according to an embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the network device 700 are respectively
  • the respective processes in FIG. 2 to FIG. 4 and the corresponding processes in the respective methods in FIG. 5 to FIG. 6 are implemented, and are not described herein again for brevity.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent. question.
  • FIG. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 8, the user equipment 800 includes:
  • the receiving unit 810 is configured to receive configuration information of each candidate secondary base station in at least one candidate secondary base station that is sent by the network device, and each candidate secondary base station in the at least one candidate secondary base station has completed path switching preparation and waits
  • the UE selects it as the target secondary base station, and the path switching preparation includes at least one of the following: pre-configuring the access resource for the UE, and establishing a data transmission channel with the network device.
  • the switching unit 820 is configured to switch to the target secondary base station in the at least one candidate secondary base station according to configuration information of each candidate secondary base station in the at least one candidate secondary base station when the secondary base station handover needs to be performed.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station is information about access resources pre-configured by the UE. Each candidate secondary base station is uplink authorization information pre-configured by the UE.
  • the receiving unit 810 is further configured to receive the first indication message sent by the network device, and determine, according to the first indication message, that the UE needs to perform the secondary base station handover, where the first indication message is used to instruct the UE to perform a handover triggering condition at the time of handover, the triggering condition comprising: at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; and a signal quality of the first candidate secondary base station of the at least one candidate secondary base station The load of the secondary base station currently accessed by the UE is higher than the third threshold; the load of the second candidate secondary base station of the at least one candidate secondary base station is lower than the fourth threshold.
  • the receiving unit 810 is specifically configured to: receive a second indication message that is sent by the network device, where the second indication message carries priority information of each of the at least one candidate secondary base station; Determining a target secondary base station according to priority information of each of the at least one candidate secondary base station; the switching unit 820 is specifically configured to use the second indication message and the target secondary base station The configuration information is switched to the target secondary base station.
  • the user equipment 800 further includes: a sending unit, where the sending unit is configured to send a measurement report of the UE to the network device, where the measurement report is used by the network device to determine the target secondary base station according to the measurement report; and the receiving unit 810 And a third indication message for receiving the network device, and determining, according to the third indication message, that the UE needs to perform the secondary base station handover, where the third indication message is used to indicate that the UE switches to the target secondary base station.
  • a sending unit is configured to send a measurement report of the UE to the network device, where the measurement report is used by the network device to determine the target secondary base station according to the measurement report
  • the receiving unit 810 And a third indication message for receiving the network device, and determining, according to the third indication message, that the UE needs to perform the secondary base station handover, where the third indication message is used to indicate that the UE switches to the target secondary base station.
  • the user equipment 800 further includes: a sending unit, configured to: after the UE accesses the target secondary base station, send a fourth indication message to the network device, where the fourth indication message is used to indicate The UE successfully accesses the target secondary base station.
  • a sending unit configured to: after the UE accesses the target secondary base station, send a fourth indication message to the network device, where the fourth indication message is used to indicate The UE successfully accesses the target secondary base station.
  • the network device 800 may correspond to an execution body of a method for switching a secondary base station according to an embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the network device 800 are respectively
  • the respective processes in FIG. 2 to FIG. 4 and the corresponding processes in the respective methods in FIG. 5 to FIG. 6 are implemented, and are not described herein again for brevity.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • FIG. 9 is a schematic block diagram of a network device according to an embodiment of the present invention. As shown in FIG. 9, the network device 900 includes:
  • the receiving unit 910 is configured to receive the advance preparation indication information that is sent by the first network device, where the advance preparation indication information is used to instruct the network device to perform path switching preparation, where the path switching preparation includes at least one of the following:
  • the UE pre-configures the access resource, and establishes a data transmission channel corresponding to the UE with the first network device.
  • the switching unit 920 performs path switching preparation according to the advance preparation indication information and waits for the UE to switch to the secondary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent. question.
  • the network device 700 further includes: a sending unit, where the sending unit sends an advance preparation completion message to the first network device, where the advance preparation completion message carries at least one of the following information: the network device is a UE The information of the pre-configured access resource and the TEID assigned by the network device to the UE.
  • the sending unit is further configured to: when the UE successfully accesses the network device, send the indication information to the first network device, where the indication information is used to indicate that the UE has successfully accessed the network device.
  • the network device 800 may correspond to an execution body of a method for switching a secondary base station according to an embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the network device 800 are respectively
  • the respective processes in FIG. 2 to FIG. 4 and the corresponding processes in the respective methods in FIG. 5 to FIG. 6 are implemented, and are not described herein again for brevity.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • an embodiment of the present invention further provides a network device 1000, which includes a processor 1001, a memory 1002, a bus system 1003, a receiver 1004, and a transmitter 1005.
  • the processor 1001, the memory 1002 and the receiver 1004 are connected by a bus system 1003 for storing instructions for executing instructions stored in the memory 1002 and controlling the receiver 1004 to receive information.
  • the transmitter 1005 is configured to: send, to each of the at least one candidate secondary base station, advance preparation indication information, where the advance preparation indication information is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs
  • the path switching preparation includes at least one of the following: pre-configuring the user equipment for accessing the resource, and establishing a data transmission channel with the network device; and transmitting, to the UE, each candidate secondary base station of the at least one candidate secondary base station
  • the configuration information is that, when the UE needs to perform the secondary base station handover, the UE switches to the target secondary base station in the at least one candidate secondary base station according to the configuration information of each candidate secondary base station in the at least one candidate secondary base station.
  • the transmitter 1005 is specifically configured to each candidate in the at least one candidate secondary base station.
  • the secondary base station sends the advance preparation indication information, where the advance preparation indication information is used to indicate that each candidate secondary base station in the at least one candidate secondary base station performs path switching preparation, so that each candidate secondary base in the at least one candidate secondary base station waits for the user.
  • the device UE selects it as the target secondary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • the processor 1001 may be a central processing unit (“CPU"), and the processor 1001 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 1002 can include read only memory and random access memory and provides instructions and data to the processor 1001. A portion of the memory 1002 may also include a non-volatile random access memory. For example, the memory 1002 can also store information of the device type.
  • the bus system 1003 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 1003 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1001 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: each candidate secondary base station is a pre-configured random access resource information of the UE. And each candidate secondary base station is configured with uplink authorization information for the UE.
  • the transmitter 1005 is further configured to: send the first finger to the UE.
  • the first indication message is used to indicate a handover trigger condition for the UE to perform handover, and the handover trigger condition includes at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; The signal quality of the first candidate secondary base station in the candidate secondary base station is higher than the second threshold; the load of the secondary base station currently accessed by the UE is higher than the third threshold; and the signal quality of the second candidate secondary base station in the at least one candidate secondary base station Below the fourth threshold.
  • the processor 1001 is further configured to: determine priority information of each candidate secondary base station in the at least one candidate secondary base station according to current state information of each candidate secondary base station in the at least one candidate secondary base station.
  • the transmitter 1005 is further configured to send, to the UE, priority information of each candidate secondary base station in the at least one candidate secondary base station, so that the UE preferentially switches to the priority information of each candidate secondary base station in the at least one candidate secondary base station. a target secondary base station in the at least one candidate secondary base station.
  • the processor 1001 is further configured to: determine that an access procedure is completed between the UE and the target secondary base station; the transmitter 1005 is configured to send data to the target secondary base station, so as to facilitate the UE and the target secondary The base station performs data transmission.
  • the receiver 1004 is further configured to: receive a second indication message sent by the UE, where the second indication message is used to indicate that the UE successfully accesses the target secondary base station; and/or the receiver 1004 And a third indication message that is sent by the target secondary base station, where the third indication message is used to indicate that the UE successfully accesses the target secondary base station.
  • the network device 1000 is a small station controller, and the receiver 1004 is further configured to receive a measurement report of the UE sent by the primary base station, where the measurement report includes a measurement result of the UE to multiple secondary base stations;
  • the processor 1001 is configured to determine at least one candidate secondary base station from a plurality of secondary base stations according to the measurement report.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • an embodiment of the present invention further provides a network device 1100.
  • the network device 1100 includes a processor 1101, a memory 1102, a bus system 1103, a receiver 1104, and a transmitter 1105.
  • the processor 1101, the memory 1102, and the receiver 1104 pass through the bus system 1103.
  • the memory 1102 is used to store instructions
  • the processor 1101 is configured to execute instructions stored by the memory 1102 and control the receiver 1104 to receive information.
  • the receiver 1104 is configured to: receive configuration information of each candidate secondary base station in at least one candidate secondary base station that is sent by the network device, and each candidate secondary base station in the at least one candidate secondary base station has completed path switching preparation and waits for The UE selects it as the target secondary base station, and the path switching preparation includes at least one of the following: pre-configuring an access resource for the UE, and establishing a data transmission channel with the network device; the processor 1101 is configured to perform the UE in need When the secondary base station is switched, the configuration information of each candidate secondary base station in the at least one candidate secondary base station is switched to the target secondary base station in the at least one candidate secondary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • the processor 1101 may be a central processing unit (“CPU"), and the processor 1101 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 1102 can include read only memory and random access memory and provides instructions and data to the processor 1101.
  • a portion of the memory 1102 can also include a non-volatile random access memory.
  • the memory 1102 can also store information of the device type.
  • the bus system 1103 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 1103 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1101 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1102, and the processor 1101 reads the information in the memory 1102.
  • configuration information of each candidate secondary base station in the at least one candidate secondary base station includes at least one of the following: identity information of each candidate secondary base station, and each candidate secondary base station is a UE The information of the pre-configured random access resources, the UE identifiers allocated to the UE by each candidate secondary base station, and the uplink authorization information pre-configured by the UE by each candidate secondary base station.
  • the receiver 1004 is further configured to: receive a first indication message sent by the network device, and determine, according to the first indication message, that the UE needs to perform a secondary base station handover, where the first indication message is used to instruct the UE to perform a handover triggering condition at the time of handover, the triggering condition comprising: at least one of the following conditions: a signal quality of the secondary base station currently accessed by the UE is lower than a first threshold; and a signal quality of the first candidate secondary base station of the at least one candidate secondary base station The load of the secondary base station currently accessed by the UE is higher than the third threshold; the load of the second candidate secondary base station of the at least one candidate secondary base station is lower than the fourth threshold.
  • the receiver 1004 is further configured to: receive a second indication message sent by the network device, where the second indication message carries priority information of each of the at least one candidate secondary base station; The priority information of each of the at least one candidate secondary base station determines the target secondary base station; the processor 1101 is configured to switch to the target secondary base station according to the second indication message and the configuration information of the target secondary base station.
  • the transmitter 1105 is further configured to: send a measurement report of the UE to the network device, where the measurement report is used by the network device to determine the target secondary base station according to the measurement report; and the receiver 1104 is further configured to receive the network device.
  • the third indication message is determined according to the third indication message that the UE needs to perform the secondary base station handover, and the third indication message is used to indicate that the UE switches to the target secondary base station.
  • the transmitter 1105 is further configured to: after the UE accesses the target secondary base station, send a fourth indication message to the network device, where the fourth indication message is used to indicate that the UE successfully accesses the target secondary base station. .
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • an embodiment of the present invention further provides a network device 1200, where the network is configured.
  • the device 1200 includes a processor 1201, a memory 1202, a bus system 1203, and a transmitter 1204.
  • the processor 1201, the memory 1202 and the transmitter 1204 are connected by a bus system 1203 for storing instructions for executing instructions stored by the memory 1202 and controlling the receiver 1204 to receive information.
  • the transmitter 1204 is configured to: receive the advance preparation indication information that is sent by the first network device, where the advance preparation indication information is used to indicate that the network device performs path switching preparation, where the path switching preparation includes at least one of the following:
  • the UE pre-configures the access resource, and establishes a data transmission channel corresponding to the UE with the first network device.
  • the processor 1201 is configured to: perform path switching preparation according to the advance preparation indication information, and wait for the UE to switch to the Secondary base station.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • the processor 1201 may be a central processing unit (“CPU"), and the processor 1201 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 1202 can include read only memory and random access memory and provides instructions and data to the processor 1201. A portion of the memory 1202 may also include a non-volatile random access memory. For example, the memory 1202 can also store information of the device type.
  • the bus system 1203 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 1203 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 1201 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, etc., and a mature storage medium in the field. in.
  • the storage medium is located in the memory 1202, and the processor 1201 reads the information in the memory 1202 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the transmitter 1204 is further configured to: send an advance preparation completion message to the first network device, where the advance preparation completion message carries at least one of the following information: the network device pre-configured for the UE The information of the resource and the TEID assigned by the network device to the UE.
  • the transmitter 1204 is further configured to: when the UE successfully accesses the network device, send the indication information to the first network device, where the indication information is used to indicate that the UE has successfully accessed the network device.
  • the present invention implements a method for a secondary base station handover, a network device, and a user equipment, and the network device indicates that each candidate secondary base station in at least one candidate secondary base station performs path switching preparation in advance, so that the user equipment needs to perform During path switching, handover is performed according to configuration information of each candidate secondary base station in at least one candidate secondary base station. Therefore, the embodiment of the present invention can reduce the mobility deterioration problem caused by the cell coverage of the secondary base station in the network being too small and the cell switching is frequent.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例提供一种用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于至少一个候选辅基站中的每个候选辅基等待用户设备将其选定为目标辅基站，该路径切换准备包括下列至少一种：为用户设备预配置接入资源，以及与网络设备之间建立数据传输通道；以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换至该至少一个候选辅基站中的目标辅基站。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。

Description

用于辅基站切换的方法、网络设备和用户设备 技术领域
本发明实施例涉及通信领域，并且更具体地，涉及一种用于辅基站切换的方法、网络设备和用户设备。
背景技术
随着移动业务的指数性增长，移动网络朝着5G网络演进。5G网络中需要更大带宽和更高的频谱效率，以支持业务的爆炸式增长。使用超密集，低功率的小站网络可以有效地提供更高的数据量。目前，业界提出了传统网络(例如，长期演进网络LTE)和5G网络多连接的技术，其中，由传统网络提供网络覆盖，提高移动的鲁棒性，由5G提供更高的传输速率，提高系统容量。然而，随着小区覆盖范围的变小，用户设备(英文：User Equipment，简写：UE)在小区间、在小区基站间切换的频率会增加，这样的结果将会导致用户设备在多个小区间移动性能严重恶化。
因此，亟需一种用于辅基站切换的方法，能够降低由于5G网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性能恶化问题。
发明内容
本发明实施例提供用于辅基站切换的方法、网络设备和用户设备。
第一方面，提供了一种用于辅基站切换的方法，包括：网络设备向至少一个候选辅基站中的每个候选辅基站发送提前准备指示，所述提前准备指示用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待用户设备UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入的资源，以及与网络设备之间建立数据传输通道；所述网络设备向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息，以便于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的所述目标辅基站。
结合第一方面，在第一方面的第一种可能的实现方式中，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
结合第一方面或第一方面的一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述方法还包括：向所述UE发送第一指示消息，所述第一指示消息用于指示所述UE进行切换的切换触发条件，所述切换触发条件包括以下条件中的至少一种：所述UE当前接入的辅基站的信号质量低于第一阈值；所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；所述UE当前接入的辅基站的负载高于第三阈值；所述至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
结合第一方面或第一方面的第一至第二种可能的实现方式，在第一方面的第三种可能的实现方式中，在向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息之前，所述方法还包括：根据所述至少一个候选辅基站中每个候选辅基站的当前状态信息，确定所述至少一个候选辅基站中每个候选辅基站的优先级信息；向所述UE发送所述至少一个候选辅基站中每个候选辅基站的优先级信息，以便于所述UE根据所述至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至所述至少一个候选辅基站中的所述目标辅基站。
结合第一方面或第一方面的第一至第三种可能的实现方式，在第一方面的第四种可能的实现方式中，所述方法还包括：确定所述UE与所述目标辅基站之间完成接入过程；将数据发送至所述目标辅基站，以便于所述UE与所述目标辅基站进行数据传输。
结合第一方面的第四种可能的实现方式，在第一方面的第五种可能的实现方式中，所述确定所述UE与所述第四辅基站之间完成接入过程，包括：接收所述UE发送的第二指示消息，所述第二指示消息用于指示所述UE成功接入所述目标辅基站；和/或接收所述目标辅基站发送的第三指示消息，所述第三指示消息用于指示所述UE成功接入所述目标辅基站。
结合第一方面或第一方面的第一至第六种可能的实现方式，在第一方面的第七种可能的实现方式中，所述网络设备为小站控制器，在所述向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息之前，所述 方法还包括：接收主基站发送的所述UE的测量报告，所述测量报告包括所述UE对多个辅基站的测量结果；根据所述测量报告，从所述多个辅基站中确定所述至少一个候选辅基站。
第二方面，提供一种用于辅基站切换的方法，其特征在于，包括：用户设备UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，所述至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待所述UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置接入资源，以及与网络设备之间建立数据传输通道；所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的所述目标辅基站。
结合第二方面，在第二方面的第一种可能的实现方式中，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二中可能的实现方式中，所述方法还包括：接收所述网络设备发送的第一指示消息，并根据所述第一指示消息确定所述UE需要进行辅基站切换，所述第一指示消息用于指示所述UE进行切换时的切换触发条件，所述触发条件包括以下条件中的至少一种：所述UE当前接入的辅基站的信号质量低于第一阈值；所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；所述UE当前接入的辅基站的负载高于第三阈值；所述至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述在所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的目标辅基站，包括：接收所述网络设备发送的第二指示消息，其中，所述第二指示消息携带所述至少一个候选辅基站中每个辅基站的优先级信息；根据所述至少一个候选辅基站中每个辅基站的优先级信息确定所述目标辅基站；根据所述第二指示消息和所述目标辅基站的配置信息，切换至所述目标辅基站。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第四 种可能的实现方式中，在所述UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息之后，所述方法还包括：向所述网络设备发送所述UE的测量报告，所述测量报告用于所述网络设备根据所述测量报告确定所述目标辅基站；接收所述网络设备的第三指示消息，并根据所述第三指示消息确定所述UE需要进行辅基站切换，所述第三指示消息用于指示所述UE切换至所述目标辅基站。
结合第二方面或第二面第一或第四种可能的实现方式，在第二方面的第五种可能的实现方式中，所述方法还包括：所述UE在接入所述目标辅基站之后，向所述网络设备发送第四指示消息，所述第四指示消息用于指示所述UE成功接入所述目标辅基站。
第三方面，提供一种用于辅基站切换的方法，包括：辅基站接收网络设备发送的提前准备指示信息，所述提前准备指示信息用于指示所述辅基站进行路径切换准备，所述路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与所述网络设备之间建立与所述UE对应的数据传输通道；根据所述提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
结合第三方面，在第三方面的第一种可能的实现方式中，所述方法还包括：向所述网络设备发送提前准备完成消息，所述提前准备完成消息携带下列信息中的至少一种：所述辅基站为所述UE预配置的接入资源的信息、所述辅基站为所述UE分配的通用分组无线系统隧道协议隧道标识GTP TEID。
结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述方法还包括：当所述UE成功接入所述辅基站时，所述辅基站向所述网络设备发送指示信息，所述指示信息用于指示所述UE已经成功接入所述辅基站。
第四方面，提供一种网络设备，包括：确定单元，所述确定单元用于确定向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，所述提前准备指示信息用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待用户设备UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入资源，以及与网络设备之间建立数据传输通道；发送单元，所述发送单元用于向所述至少一个候选辅基站中的每个候选辅基 站发送所述提前准备指示信息，所述提前准备指示信息用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待所述UE将其选定为所述目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入资源，以及与网络设备之间建立数据传输通道；所述发送单元还用于向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息，以便于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的所述目标辅基站。
结合第四方面，在第四方面的第一种可能的实现方式中，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
结合第四方面或第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，所述发送单元还用于向所述UE发送第一指示消息，所述第一指示消息用于指示所述UE进行切换的切换触发条件，所述切换触发条件包括以下条件中的至少一种：所述UE当前接入的辅基站的信号质量低于第一阈值；所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；所述UE当前接入的辅基站的负载高于第三阈值；所述至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
结合第四方面或第四方面的第一至第二种可能的实现方式中，在第四方面的第三种可能的实现方式中，所述确定单元还用于根据所述至少一个候选辅基站中每个候选辅基站的当前状态信息，确定所述至少一个候选辅基站中每个候选辅基站的优先级信息；所述发送单元还用于向所述UE发送所述至少一个候选辅基站中每个候选辅基站的优先级信息，以便于所述UE根据所述至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至所述至少一个候选辅基站中的所述目标辅基站。
结合第四方面或第四方面的第一至第三种可能的实现方式，在第四方面的第四种可能的实现方式中，所述确定单元还用于确定所述UE与所述目标辅基站之间完成接入过程；所述发送单元还用于将数据发送至所述目标辅基站，以便于所述UE与所述目标辅基站进行数据传输。
结合第四方面的第四种可能的实现方式，在第四方面的第五种可能的实 现方式中，所述网络设备还包括：第一接收单元，所述第一接收单元用于接收所述UE发送的第二指示消息，所述第二指示消息用于指示所述UE成功接入所述目标辅基站；和/或所述第二接收单元用于接收所述目标辅基站发送的第三指示消息，所述第三指示消息用于指示所述UE成功接入所述目标辅基站。
结合第四方面或第四方面的第一至第五种可能的实现方式，在第四方面的第六种可能的实现方式中，所述网络设备为小站控制器，所述网络设备还包括：第二接收单元，所述第二接收单元用于接收主基站发送的所述UE的测量报告，所述测量报告包括所述UE对多个辅基站的测量结果；所述确定单元还用于根据所述测量报告，从所述多个辅基站中确定所述至少一个候选辅基站。
第五方面，本发明提供一种用户设备，包括：接收单元，所述接收单元用于接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，所述至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待所述UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置接入资源，以及与网络设备之间建立数据传输通道；切换单元，所述切换单元用于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的目标辅基站。
结合第五方面，在第五方面的第一种可能的实现方式中，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
结合第五方面或第五方面的第一种可能的实现方式中，在第五方面的第二种可能的实现方式中，所述接收单元还用于接收所述网络设备发送的第一指示消息，并根据所述第一指示消息确定所述UE需要进行辅基站切换，所述第一指示消息用于指示所述UE进行切换时的切换触发条件，所述触发条件包括以下条件中的至少一种：所述UE当前接入的辅基站的信号质量低于第一阈值；所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；所述UE当前接入的辅基站的负载高于第三阈值；所述至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
结合第五方面的第二种可能的实现方式，在第五方面的第三种可能的实现方式中，所述单元具体用于：接收所述网络设备发送的第二指示消息，其中，所述第二指示消息携带所述至少一个候选辅基站中每个辅基站的优先级信息；根据所述至少一个候选辅基站中每个辅基站的优先级信息确定所述目标辅基站；所述切换单元具体用于根据所述第二指示消息和所述目标辅基站的配置信息，切换至所述目标辅基站。
结合第五方面或第五方面的第一种可能的实现方式，在第五方面的第四种可能的实现方式中，所述设备还包括：发送单元，所述发送单元用于向所述网络设备发送所述UE的测量报告，所述测量报告用于所述网络设备根据所述测量报告确定所述目标辅基站；所述接收单元还用于接收所述网络设备的第三指示消息，并根据所述第三指示消息确定所述UE需要进行辅基站切换，所述第三指示消息用于指示所述UE切换至所述目标辅基站。
结合第五方面或第五方面的第一至第三种可能的实现方式，在第五方面的第五种可能的实现方式中，所述设备还包括：发送单元，所述发送单元用于在所述UE在接入所述目标辅基站之后，向所述网络设备发送第四指示消息，所述第四指示消息用于指示所述UE成功接入所述目标辅基站。
第六方面，提供一种网络设备，包括：接收单元，所述接收单元用于接收第一网络设备发送的提前准备指示信息，所述提前准备指示信息用于指示所述网络设备进行路径切换准备，所述路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与所述第一网络设备之间建立与所述UE对应的数据传输通道；切换单元，根据所述提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
结合第六方面，在第六方面的第一种可能的实现方式中，所述设备还包括：发送单元，所述发送单元向所述第一网络设备发送提前准备完成消息，所述提前准备完成消息携带下列信息中的至少一种：所述网络设备为所述UE预配置的接入资源的信息、所述网络设备为所述UE分配的通用分组无线系统隧道协议隧道标识GTP TEID。
结合第六方面的第一种可能的实现方式，在第六方面的第二种可能的实现方式中，所述发送单元还用于：当所述UE成功接入所述网络设备时，向所述第一网络设备发送指示信息，所述指示信息用于指示所述UE已经成功接入所述网络设备。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A是本发明实施例的应用场景的示意性构架图。
图1B是本发另一实施例的应用场景的示意性构架图。
图2是本发明实施例的用于辅基站切换的方法的示意性流程图。
图3是本发明另一实施例的用于辅基站切换的方法的示意性流程图。
图4是本发明另一实施例的用于辅基站切换的方法的示意性流程图。
图5是根据本发明实施例的用于辅基站切换的示意性流程图。
图6是根据本发明另一实施例的用于辅基站切换的示意性流程图。
图7是本发明实施例的网络设备的示意性框图。
图8是本发明实施例的用户设备的示意性框图。
图9是本发明另一实施例的网络设备的示意性框图。
图10是本发明实施例的网络设备的装置的示意性框图。
图11是本发明另一实施例的网络设备的装置的示意性框图。
图12是本发明另一实施的网络设备的装置的示意性框图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应理解，用户设备(英文：User Equipment，简写：UE)，也可称之为移动终端(Mobile Terminal)、移动用户设备等，可以经无线接入网(例如，RAN，Radio Access Network)与一个或多个核心网进行通信，用户设备可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。
应理解，基站，可以是长期演进(英文：Long Term Evolution，简称：LTE)系统中的演进型基站(eNB或e-NodeB，evolutional Node B)，也可以是通用移动电信系统(英文：Universal Mobile Telecommunication System，简称：UMTS)中的无线网络控制器(英文：Radio Network Controller，简称：RNC)等，还可以是5G系统中的新兴基站，本发明并不限定。
图1A和图1B是本发明实施例的应用场景示意性构架图。
如图1A所示，该系统构架采用了LTE和5G新系统的多连接技术，其中，LTE系统中的宏基站作为主基站(英文：Master eNB，简写MeNB)提供覆盖和移动性，5G新系统小区作为辅基站(英文：Secondary eNB，简写：SeNB)提高系统容量。宏基站与5G新系统小站通过Xn接口进行连接。在该网络构架中，用户面协议栈包括分组数据汇聚协议(英文：Packet Data Convergence Protocol，简写：PDCP)层、无线链路控制(英文：Radio Link Control，简写：RLC)层和媒体介入控制(英文：Media Access Control，简写：MAC)层，用户面中的PDCP层位于主基站，通过Xn接口与辅基站间传递PDCP协议数据单元(英文：PDCP Protocol Data Unit，简写：PDCP PDU)。
如图1B所示，该系统构架同样是LTE和5G新系统的多连接技术，而其中，5G新系统小区由小站控制器统一管理，LTE宏基站作为主基站通过Xn接口与该小站控制器连接。在该网络构架中，用户面协议栈包括PDCP层、RLC层和MAC层，主基站与小站控制器通过Xn接口进行通信，其中PDCP层可位于小站控制器，例如，主基站将数据包发送至小站控制器，经由小站控制器的PDCP层处理后，小站控制器将PDCP PDU发送至5G新型小站。
应理解，本发明实施例将以应用于LTE和5G新系统的多连接技术场景为例进行说明，但本发明并不限于此。另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象 的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
图2示出了本发明实施例的用于辅基站切换的方法的示意性流程图。执行该方法200的网络设备可以为作为主基站的宏基站，也可以为用于统一管理5G小基站的小站控制器，如图2所示，该方法200包括：
210，网络设备向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，该提前准备指示信息用于指示上述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，该路径切换准备包括下列至少一种：为用户设备UE预配置进行接入资源，以及与网络设备之间建立数据传输通道。
220，网络设备向UE发送上述至少一个候选辅基站中每个候选辅基站的配置信息，以便于UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
在步骤210中，网络设备向其覆盖范围内的至少一个候选辅基站发送提前准备指示信息，该提前备指示信息可以携带在增加请求消息中，也可以携带在其它的请求消息中，该至少一个候选辅基站可组成候选辅基站簇。本发明不限于此。
具体地，该提前准备指示信息用于指示收到该信息的每个候选辅基站提前进行准备与UE进行通信，以便于至少一个候选辅基站中的每个候选基站等待UE将其选定为目标辅基站，又或者，以便于当UE具有切换需求时，该至少一个候选辅基站中的每个候选辅基站已经做好切换准备。
具体地，收到提前准备指示信息的候选辅基站进行的路径切换准备包括：为UE提前分配并预留资源，以便于UE自主地快速切换至该候选辅基站，例如分配随机接入参数preamble等，并在一段时间(例如可以为1分钟)内将该资源预留给该UE，等待UE的接入，当UE切换条件满足时，自主切换至该所述候选辅基站中的某一个满足条件的候选辅基站作为目标辅基站时，所述网络设备无需再触发路径切换准备流程，从而减少UE辅基站改变的时延；并且进一步地，为了完成与上述UE之间后续的数据路径切换，该候选辅基站需将提前建立网络设备与辅基站之间的数据通道，例如通用分组无线系统隧道协议用户面(英文：General Packet Radio System(GPRS) Tunnelling Protocol User Plane，简称：GTP-U)数据通道，即网络设备和辅基站分别给该数据通道分配各自的通用分组无线系统隧道协议隧道标识(英文：General Packet Radio System(GPRS)Tunnelling Protocol User Tunelling Identity，简称GTP TEID)，并发送至对方，当UE切换条件满足时，自主切换至该所述候选辅基站时，UE可通过提前建立的数据通道，迅速完成网络设备和辅基站间的路径切换。
具体地，在步骤220中，当网络设备为主基站时，主基站直接向UE发送网络设备向UE发送上述至少一个候选辅基站中每个候选辅基站的配置信息，以便于该UE根据至少一个候选辅基站中目标辅基站的配置信息进行路径切换；当网络设备为小站控制器时，小站控制器可以通过主基站向UE发送上述至少一个候选辅基站中每个候选辅基站的配置信息。当UE将至少一个候选辅基站中的每个候选基站所述作为目标辅基站后，则按照每个候选辅基站已经完成的切换准备信息接入至目标辅基站，如UE利用说书预备制的接入资源接入至所述目标辅基站。应理解，上述至少一个候选辅基站中每个候选辅基站的配置信息可以携带在每个辅基站的配置信息的无线资源控制(英文：Radio Resource Control，简写：RRC)连接重配置消息中，也可以携带在其它的请求消息中，本发明不限于此。
具体地，在步骤220中，UE需要切换时是指满足下列动作中的至少一种：UE接收主基站的切换命令、满足UE根据自身配置的切换触发条件和满足主基站下发给UE的切换触发条件。应理解，UE需要切换的条件可以是任何能够指示UE进行辅基站切换的条件，本发明不限于此。
应理解，上述至少一个候选辅基站中的目标辅基站可以指至少一个候选辅基站中的任意一个辅基站，UE可自主选择或根据网络设备的指示选择目标辅基站，并切换至目标辅基站。
还应理解，上述辅基站切换的动作可以是指UE首次接入小区时的初始接入动作，也可以指UE在主基站覆盖的小区间的切换动作。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问 题。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站为所述UE预配置的接入资源的信息和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息还可以包括下列中的至少一种：每个候选辅基站的标识信息和每个候选辅基站为UE分配的UE标识。
具体地，当UE要接入目标辅基站时，UE需根据目标候选辅基站的标识信息和目标辅基站为UE分配的UE标识，目标辅基站为UE预配置的接入资源的信息和目标选辅基站为UE预配置的上行授权信息等信息中的至少一个，接入至目标辅基站，应理解，其它用于UE接入目标辅基站的信息也落入本发明实施例的保护范围，本发明不限于此。因此，当UE需要进行辅基站的切换时，直接可以根据该配置信息切换至该至少一个候选辅基站中的目标辅基站。
可选地，作为本发明一个实施例，上述方法还包括：向UE发送第一指示消息，该第一指示消息用于指示UE进行切换的切换触发条件，切换触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
具体地，网络设备向UE下发切换触发条件，UE根据该触发条件判断是否需要进行辅基站的切换，例如：当完成路径切换准备的至少一个候选辅基站中存在候选辅基站的信号质量高于一定阈值，UE当前接入的辅基站的信号质量低于一定阈值；又例如：当完成路径切换准备的至少一个候选辅基站中存在候选辅基站的负载小于一定阈值，UE当前接入的辅基站的负载高于一定阈值时。
应理解，上述第一候选辅基和为上述第二候选辅基站为上述至少一个候选辅基站中的任意一个辅基站，第一候选辅基站与第二候选辅基站可以相同，也可以不同。还应理解，站该切换触发条件可以携带在RRC连接重配置消息中，也可以携带在其它可能的消息中，本发明不限于此。
可选地，作为本发明一个实施例，在向UE发送上述至少一个候选辅基 站中每个候选辅基站的配置信息之前，方法还包括：根据至少一个候选辅基站中每个候选辅基站的当前状态信息，确定至少一个候选辅基站中每个候选辅基站的优先级信息；向UE发送至少一个候选辅基站中每个候选辅基站的优先级信息，以便于UE根据至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至该至少一个候选辅基站中的目标辅基站。
具体地，每个候选辅基站的当前状态信息包括每个候选辅基站的功率信息、负载情况等，本发明不限于此。该网络设备可以根据UE上报的测量报告等信息，确定UE优先接入的目标辅基站，将指示UE优先切入至该目标辅基站的指示信息发送给UE，以便于UE根据该指示信息优先切入至该目标辅基站；网络设备也可以根据UE上报的测量报告和各个候选辅基站的负载情况，确定每个候选辅基站的优先级，将该优先级信息发送给UE，以便于UE根据该优先级信息确定首先切入的目标辅基站。例如，网络设备可以通过发送消息中信元的名称显示指示UE首先切换的目标辅基站，也可以通过隐式方式指示UE该至少一个候选辅基站的优先级，以便于UE确定目标辅基站，应理解，任何可以通知UE该至少一个候选辅基站的优先级信息的方法都可以实施，本发明不限于此。
可选地，作为本发明一个实施例，在向UE发送至少一个候选辅基站中每个候选辅基站的配置信息之后，该方法还包括：接收UE发送的第一测量报告，根据该第一测量报告，从至少一个候选辅基站中确定目标辅基站；向UE发送第四指示信息，第四指示信息用于指示所述UE切换至目标辅基站。
具体地，当网络设备根据UE发送的测量报告等信息，决定是否激活一个新的辅基站，即目标辅基站。如果决定激活目标辅基站，则下发激活命令给UE，该激活命令里包含要激活的目标辅基站标识，也可包括去激活原辅基站命令。接收到该激活命令后，UE可触发同步和接入流程，接入到该目标辅基站。应理解，UE也可提前完成接入到各候选辅小区的流程，在接收到激活命令后，直接在新的向目标辅基站发送上行数据。还应理解，网络设备可以根据UE的测量报告等信息，动态的确定目标辅基站，并指示UE切换到最新确定的目标辅基站。
可选地，作为本发明一个实施例，上述方法还包括：确定UE与目标辅基站之间完成接入过程；将数据发送至目标辅基站，以便于UE与所述目标辅基站进行数据传输。
具体地，当网络设备确定UE成功接入到目标辅基站后，将会把后续UE需要的数据和/或UE在原先接入的辅基站未传输成功的数据，下发至目标辅基站，以便于UE通过目标辅基站获取后续的数据。
可选地，作为本发明一个实施例，确定UE与第四辅基站之间完成接入过程，包括：接收UE发送的第二指示消息，第二指示消息用于指示UE成功接入目标辅基站；和/或接收目标辅基站发送的第三指示消息，第三指示消息用于指示UE成功接入所述目标辅基站。
具体地，当网络设备为主基站时，一种可能的实施方式为：UE在成功接入到目标辅基站后，将发送指示消息给主基站，该指示消息可以为增加目标辅基站成功接入信息的PDCP状态报告，也可以为携带增加目标辅基站成功接入信息的其它消息，本发明不限于此。主基站接收到该消息后，确定UE已经成功接入到目标辅基站，则将后续的新数据和/或在UE原先接入的辅基站为传输成功的数据，下发给目标辅基站。另外一种可能的实施方式为：UE在成功接入到目标辅基站后，目标辅基站向主基站发送指示消息，该指示消息中包括UE成功接入目标辅基站的指示信息，应理解，该指示信息可以携带在数据帧中，例如可以携带在GTP-U扩展头中的数据帧中，本发明不限于此。主基站接收到该消息后，确定UE已经成功接入到目标辅基站，则将后续的新数据和/或在UE原先接入的辅基站为传输成功的数据，下发给目标辅基站。
具体地，当网络设备为小站控制器时，UE在成功接入到目标辅基站后，将发送指示消息给主基站，该指示消息可以为增加目标辅基站成功接入信息的PDCP状态报告，也可以为携带增加目标辅基站成功接入信息的其它消息，本发明不限于此。主基站接收到该消息后，将该消息转发至小站控制器，小站控制器接收到该消息后，确定UE已经成功接入到目标辅基站，则将后续的新数据和/或在UE原先接入的辅基站为传输成功的数据，下发给目标辅基站。另外一种可能的实施方式为：UE在成功接入到目标辅基站后，目标辅基站向小站控制器发送指示消息，该指示消息中包括UE成功接入目标辅基站的指示信息，应理解，该指示信息可以携带在数据帧中，例如可以携带在GTP-U扩展头中的数据帧中，本发明不限于此。小站控制器接收到该消息后，确定UE已经成功接入到目标辅基站，则将后续的新数据和/或在UE原先接入的辅基站为传输成功的数据，下发给目标辅基站。
具体的，所述小站控制器包括第一RRC(Radio Resource Control，无线资源控制，简称RRC)子层和第一PDCP(Packet Data Convergence Protocol，分组汇聚协议，简称PDCP)子层对应的功能，所述辅基站包括第二RRC子层、第二PDCP子层、RLC(Radio Link Control，无线链路控制，简称RLC)层、MAC(Media Access Control，介质访问控制，简称MAC)层和PHY(Physical，物理的，简称PHY)层对应的功能，其中，第一RRC子层和第二RRC子成共同组成RRC层，第一RRC子层的功能为用于全局RRC配置管理，第二RRC子层的功能为用于SRB(Signalling Radio Bearers，信令无线承载，简称SRB)的生成、发送、接收和本地RRC配置管理，第一PDCP子层的功能为用于DRB(Data Radio Bearers，数据无线承载，简称DRB)的处理，第二PDCP子层的功能为用于SRB的处理。或者，所述小站控制器包括RRC层和PDCP层，用于完成RRC层和PDCP层对应的功能；所述辅基站包括RLC层、MAC层和PHY层，用于完成RLC层、MAC层和PHY层对应的功能。其中，PDCP层对应的功能包括：头压缩、安全和重排序；RLC层对应的功能包含分割、级联、自动重传请求(ARQ，Automatic Repeat Request)；MAC层的对应的功能包括：调度、逻辑信道优先级处理、HARQ(Hybrid Automatic Repeat Request，混合自动重传)等；PHY层对应的功能包括：调制解调、编码、多天线映射。例如，所述小站控制器接收所述主基站发送的数据后，完成对业务数据的PDCP功能后生成PDCP PDU，对PDCP PDU进行头压缩，根据加密算法和加密密钥对PDCP PDU加密，为PDCP PDU增加序列号，RC将PDCP PDU下发给所述辅基站，由所述辅基站完成对PDCP PDU的RLC层、MAC层和PHY层对应的功能。
可选地，作为本发明一个实施例，网络设备为小站控制器，在向UE发送至少一个候选辅基站中每个候选辅基站的配置信息之前，方法还包括：接收主基站发送的UE的测量报告，该测量报告包括UE对多个辅基站的测量结果；根据测量报告，从多个辅基站中确定至少一个候选辅基站。
具体地，当网络设备为主基站时，主基站根据UE上报的测量报告，确定至少一个候选辅基站可以作为UE进行路径切换的候选辅基站，UE上报的测量报告中包括多个辅基站的功率等信息，主基站可以根据这些信息确定UE进行路径切换的候选辅基站。
具体地，当网络设备为小站控制器时，主基站首先接收UE上报的测量报告，该测量报告包括UE对多个辅基站的测量结果和/或UE的业务信息，主基站接收到UE的测量报告后，决定增加辅基站用以分流数据，则向小站控制器发送辅基站增加请求消息，该辅基站增加请求消息中包括UE上报的测量报告，因此，小站控制器接收到该增加请求消息后，根据该消息中携带的UE的测量报告，确定至少一个候选辅基站可以作为UE进行路径切换的候选辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
图3是本发明另一实施例的用于辅基站切换的方法的示意性流程图。该方法300的执行主体可以为用户设备UE，包括：
310，用户设备UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，该至少一个候选辅基站中的每个候选辅基站已完成路径切换准备，该路径切换准备包括下列至少一种：为UE预配置接入资源，以及与网络设备之间建立数据传输通道。
320，UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
在步骤320中，上述至少一个候选辅基站中的每个候选辅基站已经完成路径切换准备，并等待UE将其选定为目标辅基站，以便于在UE具有切换需求时能够直接切换至该目标辅基站。
具体地，当网络设备为主基站时，UE接收主基站发送的重配置消息，该消息中携带至少一个候选辅基站中每个候选辅基站的配置信息，该至少一个候选辅基站为UE可以接入的候选辅基站，该至少一个候选辅基站中有一个候选辅基站为目标辅基站。应理解，目标辅基站可以由网络设备选定，通知UE切换至该选定目标辅基站，也可以是由UE从该至少一个候选辅基站中确定目标辅基站。还应理解，上述重配置消息可以为携带每个辅基站的配置信息的RRC连接重配置消息，也可以是其它携带每个辅基站的配置信息 的请求消息，本发明不限于此。
具体地，当网络设备为小站控制器时，主基站接收小站控制器确定的至少一个辅基站中每个辅基站的配置信息，将该配置信息通过重配置消息发送至UE。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站为UE预配置的接入资源的信息和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息还可以包括下列中的至少一种：每个候选辅基站的标识信息和每个候选辅基站为UE分配的UE标识。
具体地，当UE要接入目标辅基站时，UE需根据目标候选辅基站的标识信息和目标辅基站为UE分配的UE标识，目标辅基站为UE预配置的接入资源的信息和目标选辅基站为UE预配置的上行授权信息等信息中的至少一个，接入至目标辅基站，应理解，其它用于UE接入目标辅基站的信息也落入本发明实施例的保护范围，本发明不限于此。因此，当UE需要进行辅基站的切换时，直接可以根据该配置信息切换至该至少一个候选辅基站中的目标辅基站。
可选地，作为本发明一个实施例，上述方法还包括：接收网络设备发送的第一指示消息，并根据第一指示消息确定UE需要进行辅基站切换，该第一指示消息用于指示UE进行切换时的切换触发条件，触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
具体地，UE接收网络设备向下发切换触发条件，UE根据该触发条件判 断是否需要进行辅基站的切换，例如：当完成路径切换准备的至少一个候选辅基站中存在候选辅基站的信号质量高于一定阈值，UE当前接入的辅基站的信号质量低于一定阈值；又例如：当完成路径切换准备的至少一个候选辅基站中存在候选辅基站的负载小于一定阈值，UE当前接入的辅基站的负载高于一定阈值时。
应理解，上述第一候选辅基和为上述第二候选辅基站为上述至少一个候选辅基站中的任意一个辅基站，第一候选辅基站与第二候选辅基站可以相同，也可以不同。还应理解，站该切换触发条件可以携带在RRC连接重配置消息中，也可以携带在其它可能的消息中，本发明不限于此。
可选地，作为本发明一个实施例，在UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站，包括：接收网络设备发送的第二指示消息，其中，第二指示消息携带至少一个候选辅基站中每个辅基站的优先级信息；根据至少一个候选辅基站中每个辅基站的优先级信息确定目标辅基站；根据第二指示消息和目标辅基站的配置信息，至所述目标辅基站。
具体地，网络设备可以根据UE上报的测量报告等信息，确定UE优先接入的目标辅基站，将指示UE优先切入至该目标辅基站的指示信息发送给UE，UE接收到上述指示信息后，根据该指示信息优先切入至该目标辅基站；网络设备也可以根据UE上报的测量报告各个候选辅基站的负载情况，确定每个候选辅基站的优先级，将该优先级信息发送给UE，UE根据该优先级信息确定首先切入的目标辅基站。例如，网络设备可以通过发送消息中信元的名称显示指示UE首先切换的目标辅基站，也可以通过隐式方式指示UE该至少一个候选辅基站的优先级，以便于UE确定目标辅基站，应理解，任何可以通知UE该至少一个候选辅基站的优先级信息的方法都可以实施，本发明不限于此。
可选地，作为本发明一个实施例，在UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息之后，上述方法还包括：向网络设备发送UE的测量报告，该测量报告用于网络设备确定所述目标辅基站；接收网络设备的第三指示消息，并根据第三指示消息确定UE需要进行辅基站切换，第三指示消息用于指示UE切换至所述目标辅基站。
具体地，网络设备根据UE发送的测量报告等信息，决定是否激活一个 新的辅基站，即目标辅基站。如果决定激活目标辅基站，则下发激活命令给UE，该激活命令里包含要激活的目标辅基站标识，也可包括去激活原辅基站命令。UE接收到该激活命令后，确定需要进行辅基站切换，UE将触发同步和接入流程，接入到该目标辅基站。应理解，UE也可提前完成接入到各候选辅小区的流程，在接收到激活命令后，直接在新的向目标辅基站发送上行数据。还应理解，网络设备可以根据UE的测量报告等信息，动态的确定目标辅基站，并指示UE切换到最新确定的目标辅基站。
可选地，作为本发明一个实施例，上述方法还包括：UE在接入目标辅基站之后，向网络设备发送第四指示消息，第四指示消息用于指示UE成功接入所述目标辅基站。
具体地，当网络设备为主基站时，一种可能的实施方式为：UE在成功接入到目标辅基站后，将发送指示消息给主基站，该指示消息可以为增加目标辅基站成功接入信息的PDCP状态报告，也可以为携带增加目标辅基站成功接入信息的其它消息，本发明不限于此；当网络设备为小站控制器，主基站将接接收指示消息转发为该小站控制器。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
图4是本发明实施例提供的一种用于辅基站切换的方法，该方法可以由5G小基站执行。如图4所示，该方法400包括：
410，辅基站接收网络设备发送的提前准备指示信息，该提前准备指示信息用于指示辅基站进行路径切换准备，路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与网络设备之间建立与UE对应的数据传输通道；
420，根据提前准备指示信息，进行路径切换准备。
在步骤410中，辅基站在接收到提前准备指示信息之后，将为UE预配置接入资源，并且与网络设备之间建立与UE对应的数据传输通道，并等待UE切换至该辅基站，以便于UE在具有切换需求时，能够直接切换至该辅 基站，而不需要进行路径切换的准备，从而能够减少切换时所需要的时间。
具体地，辅基站提前进行准备与UE进行通信，收到提前准备指示信息的候选辅基站进行的路径切换准备包括：在UE建立接入之前开始进行资源分配，例如分配随机接入参数preamble、UE的小区临时标识等，并在一段时间(例如可以为1分钟)内将该资源预留给该UE，等待UE的接入；并且进一步地，为了完成与上述UE之间后续的数据路径切换，该候选辅基站需将提前建立网络设备与辅基站之间的数据通道，例如GTP-U数据通道，即网络设备和辅基站分别给该数据通道分配各自的GTP TEID，并发送至对方。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
可选地，作为一个实施例，上述方法还包括：向网络设备发送提前准备完成消息，提前准备完成消息携带下列信息中的至少一种：辅基站为UE预配置的接入资源的信息、辅基站为UE分配的TEID。
具体地，辅基站需要向网络设备发送辅基站为UE预配置的接入资源的信息，以便于网络设备将所述配置信息发送至UE进行接入，辅基站为UE分配的TEID用于UE接入所述辅基站后快速完成路径切换。
可选地，作为本发明一个实施例，上述方法还包括：当UE成功接入辅基站时，辅基站向网络设备发送指示信息，该指示信息用于指示UE已经成功接入辅基站。
UE在成功接入到辅基站后，辅基站向网络设备发送指示消息，该指示消息中包括UE成功接入该辅基站的指示信息，该指示信息中包括辅基站的标识信息。应理解，该指示信息可以携带在数据帧中，例如可以携带在GTP-U扩展头中的数据帧中，也可以携带在其它指示消息中，本发明不限于此。网络设备接收到该消息后，确定UE已经成功接入到新的辅基站，则将后续的新数据和/或在UE原先接入的辅基站为传输成功的数据，下发给新的辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
上面结合图2至图4，分别从网络设备、用户设备的角度详细描述了根据本发明实施例的用于辅基站切换的方法，下面将结合图5至图6，从各个设备交互的而角度描述本发明实施例的用于辅基站切换的方法。
图5是根据本发明实施例的用于辅基站切换的示意性流程图。该实施例可以应用于图1A所示出的网络结构场景中，如图5所示，该方法包括以下步骤：
501，主基站MeNB根据用户设备UE上报的测量报告，确定至少一个候选辅基站，该至少一个候选辅基站包括主基站选定的目标辅基站和其它候选辅基站。
502，主基站向5G小基站NODE1、NODE2和NODE3分别发送辅基站增加请求消息，在该消息中携带提前准备指示，该提前准备指示用于指示辅基站提前准备作为辅基站，NODE1、NODE2和NODE3各自等待UE将其选定为目标辅基站，例如：各个5G小基站接收到该多准备指示后，为UE进行接入分配资源，如随机接入参数preamble、UE的小区临时标识等，并可在一段时间内预留该资源给该UE，等待UE接入；为了完成后续的数据路径切换，在候选辅基站增加流程中需要提前建立主基站和候选辅基站的数据通道，即GTP-U隧道，即主基站和候选辅基站分别给承载分配各自的GTP TEID，并发送至对方保持。
503，主基站下发RRC连接重配消息给UE，该消息里包含选定的目标辅基站和候选辅基站的配置信息。所述选定目标辅基站可为UE首先接入的候选辅基站。并且，该RRC连接重配置消息中可包含辅基站改变的条件，即UE可以触发辅基站切换的条件：如选定当前UE接入的辅基站信号质量低于一定的门限，而存在候选辅基站的信号质量高于一定的门限；又如当前UE接入的辅基站负载高于一定的门限，而存在候选辅基站的负载低于一定的门限，此时UE将满足辅基站切换条件，切换至新的目标辅基站。该RRC 连接重配置消息可以指示UE根据何种切换策略切换至新的目标辅基站，例如该RRC连接重配置消息里面可通过信元的名称来显示区分选定的目标辅基站和其它候选辅基站；也可以通过隐式的方式区分，如位于基站列表的第一个为选定目标辅基站，后面为候选辅基站，又例如，主基站在RRC连接重配消息中也可提供候选辅基站的优先级，指示UE按照各个候选辅基站的优先级，优先考虑接入某一候选辅基站。
504，主基站选定的目标辅基站为NODE1时，UE接入至该小基站Node1，具体的，UE根据所述配置信息中的接入资源发起接入流程，接入至所述目标辅基站，并在随机接入过程中获取上行时间；可选的，UE可以不发起随机接入。目标辅基站通过preamble或者提前分配的UE的小区临时标识来识别该UE。
505，当UE成功接入目标辅基站RTA1时，可以向主基站发送该UE成功接入目标辅基站的指示信息。
具体地，UE在接入成功后，发送PDCP状态报告给主基站，该PDCP状态报告中增加新辅基站的指示。以便于主基站接收到该新辅基站的指示后，认为UE已成功接入到该新辅基站，则将后续新数据和/或在原辅基站未传成功的数据，下发给新辅基站。
506，当UE成功接入目标辅基站NODE1时，可以由目标辅基站NODE1向主基站发送指示信息，指示该UE成功接入至NODE1。
具体地，UE在接入到新的目标辅基站后，新的目标辅基站发送指示给主基站，该指示可包含在数据帧中，即在GTP-U扩展头里面的数据帧中增加一位指示，指示UE已成功接入至新的目标辅基站，以便于主基站接收到UE接入该新的目标辅基站的指示后，认为UE已成功接入到该新的目标辅基站，则将后续新数据和/或在原辅基站未传成功的数据，下发给新的目标辅基站。
507，当主基站确定UE成功接入至目标辅基站时，主基站停止向UE先前接入的原辅基站发送数据，开始向目标辅基站NODE1发送数据。
508，当主基站确定UE成功接入至目标辅基站时，将数据将从UE先前接入的原辅基站切换至目标辅基站NODE1。
UE与目标辅基站NODE1之间进行数据传输，完成路径切换过程，该过程还包括去激活UE之前接入的原辅基站。
509，UE在SeNB改变条件满足时，例如检测到当前UE接入的辅基站的信号质量低于一定的门限，而存在候选辅基站NODE2的信号质量高于一定的门限时，则UE将确定候选辅基站NODE2为新的目标辅基站。
510，UE根据接收到NODE2配置信息后，自主触发同步和接入流程，接入到该新的目标辅基站。
511，当UE成功接入目标辅基站NODE2时，可以由目标辅基站NODE2向主基站发送指示信息，指示该UE成功接入至NODE2。
512，当主基站确定UE成功接入至目标辅基站NODE2时，将数据从UE先前接入的原辅基站NODE1切换至新的目标辅基站NODE2。
513，当主基站确定UE成功接入至目标辅基站NODE2时，将数据将从UE先前接入的原辅基站切换至目标辅基站。
514，UE与目标辅基站NODE2之间进行数据传输，完成路径切换过程。515，主基站去激活原辅小区NODE1。
另外一种方式确定目标辅基站的方式是：MeNB快速指示候选辅基站的激活/去激活，即由主基站确定目标辅基站，该方式和上述方法的区别是：
1)MeNB无需下发辅基站改变的条件给UE。
2)UE上报测量报告。主基站MeNB根据测量报告等信息，决定是否激活一个新的目标辅基站，如果是，则下发激活命令给UE，该激活命令里包含要激活的目标辅基站标识，也可包括去激活原辅基站命令。接收到该激活命令后，UE可触发同步和接入流程，接入到该目标辅基站。UE也可提前完成接入到各候选辅小区的流程，在接收到激活命令后，直接在新辅小区发送上行数据。
应理解，在主基站快速指示候选辅基站的激活/去激活方法中，也可以对应于上述流程，为简洁起见，在此不再赘述。
还应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降 低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
图6是根据本发明另一实施例的用于辅基站切换的示意性流程图。该实施例可以应用于如图1B所示的网络架构场景中，如图6所示，该方法包括以下步骤：
601，主基站MeNB根据UE上报的测量结果和\或UE的业务信息，决定增加辅基站用以分流数据，则发送辅基站增加请求消息给小站控制器(英文：Small Cell Controller)。该请求消息中包含测量和\或业务信息，小站控制器接收到该消息后，根据包含的测量或\和业务信息，选定辅基站和候选辅基站。
602，小站控制器根据UE上报的测量结果和\或UE的业务信息，确定至少一个候选辅基站，该至少一个候选辅基站包括选定的目标辅基站和其它候选辅基站。
603，小站控制器向5G小基站NODE2和NODE3分别发送辅基站增加请求消息，在该消息中携带提前准备指示信息，该提前准备指示信息用于指示辅基站提前准备作为辅基站，NODE2和NODE3各自等待UE将其选定为目标辅基站，；候选辅基站接收到该多准备指示后，为UE分配随机接入所需要资源，如随机接入参数preamble等，并可在一段时间内预留该资源给该UE，等待UE接入。以及，为了完成后续的数据路径切换，在辅基站增加流程中需要提前建立主基站和候选辅基站的数据通道，即GTP-U隧道，小站控制器和辅基站分别给承载分配各自的GTP TEID，并发送至对方保持。
604，小站控制器下发RRC连接重配消息给UE，该消息里包含选定的目标辅基站和候选辅基站的配置信息，其中，所述选定目标辅基站可为UE首先接入的辅基站。并且，该RRC连接重配置消息中可包含辅基站改变的条件，即UE可以触发辅基站切换的条件：如UE当前接入的辅基站的信号质量低于一定的门限，而存在其它候选辅基站的信号质量高于一定的门限；又如UE当前接入的辅基站的负载高于一定的门限，而存在候选辅基站的负载低于一定的门限。该消息里面可通过信元的名称来显示区分选定辅基站和候选辅基站；也可以通过隐式的方式区分，如位于基站列表的第一个为选定的目标辅基站，排在后面的为候选辅基站。也可以在该消息中携带候选辅基站的优先级信息，用于指示UE按照优先级信息接入某一候选辅基站。
605，主基站选定的目标辅基站为NODE2时，UE与该NODE2建立随机接入信道。
606，当UE成功接入目标辅基站NODE 2时，可以向主基站发送该UE成功接入目标辅基站NODE2的指示信息。
具体地，UE在接入成功后，发送PDCP状态报告给主基站，该PDCP状态报告中增加新辅基站的指示。以便于主基站接收到该新辅基站的指示后，认为UE已成功接入到该新辅基站，则将后续新数据和/或在原辅基站未传成功的数据，下发给新辅基站。
607，当UE成功接入目标辅基站RTA2时，可以向主基站发送该UE成功接入目标辅基站的指示信息，主基站向小站控制器转发该UE成功接入目标辅基站NODE2的指示信息。
608，当UE成功接入目标辅基站NODE2时，可以由目标辅基站NODE2向小站控制器发送指示信息，指示该UE成功接入至NODE2。
具体地，UE在接入到新辅基站后，新辅基站发送指示给小站控制器，该指示可包含在数据帧中，即在GTP-U扩展头里面的数据帧中增加一位指示，指示UE已成功接入至新目标辅基站，以便于主基站接收到该新目标辅基站的指示后，认为UE已成功接入到该新辅基站，则将后续新数据和/或在原辅基站未传输成功的数据，下发给新目标辅基站。
609，当主基站确定UE成功接入至目标辅基站时，主基站停止向UE先前接入的原辅基站发送数据，开始向目标辅基站NODE,2发送数据。
610，当主基站确定UE成功接入至目标辅基站时，将数据将从UE先前接入的原辅基站切换至目标辅基站NODE2。
UE与目标辅基站NODE2之间进行数据传输，完成路径切换过程，该过程还包括去激活UE之前接入的原基站。
611，UE在SeNB改变条件满足时，例如当UE检测到选定辅基站的信号质量低于一定的门限，而候选辅基站NODE3的信号质量高于一定的门限时，确定候选辅基站NODE2为新的目标辅基站。
612，UE根据接收到NODE3配置信息后，自主触发同步和接入流程，接入到该新的目标辅基站。
613，当UE成功接入目标辅基站NODE3时，可以由目标辅基站NODE3向主基站发送指示信息，指示该UE成功接入至NODE3。
614，当UE成功接入目标辅基站NODE3时，可以向主基站发送该UE成功接入目标辅基站的指示信息，主基站向小站控制器转发该UE成功接入目标辅基站NODE3的指示信息。
615，当UE成功接入目标辅基站NODE 3时，目标辅基站NODE3向小站控制器发送该UE成功接入目标辅基站NODE3的指示信息。
616，当小站控制器确定UE成功接入至目标辅基站NODE3时，将数据将从UE先前接入的原辅基站NODE2切换至新的目标辅基站NODE3。
617，当主基站确定UE成功接入至目标辅基站NODE3时，将数据将从UE先前接入的原辅基站切换至目标辅基站NODE3。
618，UE与目标辅基站NODE3之间进行数据传输，完成路径切换过程。515，主基站去激活原辅小区NODE2。
另外一种方式确定目标辅基站的方式是：MeNB快速指示候选辅基站的激活/去激活，即由主基站确定目标辅基站，该方式和上述方法的区别是：
1)MeNB无需下发辅基站改变的条件给UE。
2)UE上报测量报告。小站控制器MeNB根据测量报告等信息，决定是否激活一个新的目标辅基站，如果是，则下发激活命令给UE，该激活命令里包含要激活的目标辅基站标识，也可包括去激活原辅基站命令。接收到该激活命令后，UE可触发同步和接入流程，接入到该目标辅基站。UE也可提前完成接入到各候选辅小区的流程，在接收到激活命令后，直接在新辅小区发送上行数据。
应理解，在主基站快速指示候选辅基站的激活/去激活方法中，也可以对应于上述流程，为简洁起见，在此不再赘述。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
上文中结合图1至图6，详细描述了根据本发明实施例的用于路径切换的方法，下面将结合图7至图12，详细描述根据本发明实施例的用于路径切换的网络设备和用户设备。图7示出了本发明实施例的一种用于辅基站切换的网络设备，如图7所示，该网络设备700包括：
确定单元710，该确定单元710用于确定向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，该提前准备指示信息用于指示上述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，该路径切换准备包括下列至少一种：为用户设备UE预配置进行接入资源，以及与网络设备之间建立数据传输通道。
发送单元720，发送单元720用于向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，该提前准备指示信息用于指示上述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，该路径切换准备包括下列至少一种：为用户设备UE预配置进行接入资源，以及与网络设备之间建立数据传输通道。
发送单元720还用于向UE发送至少一个候选辅基站中每个候选辅基站的配置信息，以便于UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
具体地，发送单元720发送的所述提前准备指示信息用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待所述UE将其选定为所述目标辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站为UE预配置的接入资源的信息和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为本发明一个实施例，上述发送单元720还用于向UE发送 第一指示消息，该第一指示消息用于指示UE进行切换的切换触发条件，该切换触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；上述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
可选地，作为本发明一个实施例，确定单元710还用于根据至少一个候选辅基站中每个候选辅基站的当前状态信息，确定至少一个候选辅基站中每个候选辅基站的优先级信息；第二发送单元还用于向UE发送至少一个候选辅基站中每个候选辅基站的优先级信息，以便于UE根据至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至该至少一个候选辅基站中的目标辅基站。
可选地，作为本发明一个实施例，确定单元710还用于确定UE与目标辅基站之间完成接入过程；发送单元720还用于将数据发送至目标辅基站，以便于UE与目标辅基站进行数据传输。
可选地，作为本发明一个实施例，网络设备700还包括：第一接收单元，该第一接收单元用于接收UE发送的第二指示消息，第二指示消息用于指示UE成功接入目标辅基站；和/或第二接收单元用于接收目标辅基站发送的第三指示消息，第三指示消息用于指示UE成功接入目标辅基站。
可选地，作为本发明一个实施例，网络设备700为小站控制器，网络设备700还包括：第二接收单元，该第二接收单元用于接收主基站发送的UE的测量报告，该测量报告包括UE对多个辅基站的测量结果；确定单元710还用于根据测量报告，从多个辅基站中确定至少一个候选辅基站。
应理解，根据本发明实施例的网络设备700可对应于本发明实施例的用于切换辅基站的方法的执行主体，并且网络设备700中的各个模块的上述和其它操作和/或功能分别为了实现图2至图4中的各个方法以及图5至图6中的各个方法的相应流程，为了简洁，在此不再赘述。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问 题。
图8是本发明实施例的一种用户设备的示意性框图，如图8所示，该用户设备800包括：
接收单元810，接收单810元用于接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，该至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待UE将其选定为目标辅基站，该路径切换准备包括下列至少一种：为UE预配置接入资源，以及与网络设备之间建立数据传输通道。
切换单元820，切换单元820用于UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站为UE预配置的接入资源的信息和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为本发明一个实施例，接收单元810还用于接收网络设备发送的第一指示消息，并根据第一指示消息确定UE需要进行辅基站切换，第一指示消息用于指示UE进行切换时的切换触发条件，该触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
可选地，作为本发明一个实施例，接收单元810具体用于：接收网络设备发送的第二指示消息，其中，第二指示消息携带至少一个候选辅基站中每个辅基站的优先级信息；根据至少一个候选辅基站中每个辅基站的优先级信息确定目标辅基站；切换单元820具体用于根据第二指示消息和目标辅基站 的配置信息，切换至目标辅基站。
可选地，作为本发明一个实施例，用户设备800还包括：发送单元，发送单元用于向网络设备发送UE的测量报告，测量报告用于网络设备根据测量报告确定目标辅基站；接收单元810用于接收网络设备的第三指示消息，并根据第三指示消息确定UE需要进行辅基站切换，第三指示消息用于指示UE切换至目标辅基站。
可选地，作为本发明一个实施例，用户设备800还包括：发送单元，发送单元用于在UE在接入目标辅基站之后，向网络设备发送第四指示消息，第四指示消息用于指示UE成功接入目标辅基站。
应理解，根据本发明实施例的网络设备800可对应于本发明实施例的用于切换辅基站的方法的执行主体，并且网络设备800中的各个模块的上述和其它操作和/或功能分别为了实现图2至图4中的各个方法以及图5至图6中的各个方法的相应流程，为了简洁，在此不再赘述。基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
图9示出了本发明实施例的一种网络设备的示意性框图，如图9所示，该网络设备900包括：
接收单元910，接收单元910用于接收第一网络设备发送的提前准备指示信息，该提前准备指示信息用于指示网络设备进行路径切换准备，路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与第一网络设备之间建立与UE对应的数据传输通道。
切换单元920，根据提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问 题。
可选地，作为本发明一个实施例，网络设备700还包括：发送单元，发送单元向第一网络设备发送提前准备完成消息，提前准备完成消息携带下列信息中的至少一种：网络设备为UE预配置的接入资源的信息、网络设备为UE分配的TEID。
可选地，作为本发明一个实施例发送单元还用于：当UE成功接入网络设备时，向第一网络设备发送指示信息，指示信息用于指示UE已经成功接入所述网络设备。
应理解，根据本发明实施例的网络设备800可对应于本发明实施例的用于切换辅基站的方法的执行主体，并且网络设备800中的各个模块的上述和其它操作和/或功能分别为了实现图2至图4中的各个方法以及图5至图6中的各个方法的相应流程，为了简洁，在此不再赘述。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
如图10所示，本发明实施例还提供了一种网络设备1000，该网络设备1000包括处理器1001、存储器1002、总线系统1003、接收器1004和发送器1005。其中，处理器1001、存储器1002和接收器1004通过总线系统1003相连，该存储器1002用于存储指令，该处理器1001用于执行该存储器1002存储的指令，并控制该接收器1004接收信息。其中，该发送器1005用于：向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，该提前准备指示信息用于指示上述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，该路径切换准备包括下列至少一种：为用户设备UE预配置进行接入资源，以及与网络设备之间建立数据传输通道；向UE发送至少一个候选辅基站中每个候选辅基站的配置信息，以便于UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
具体地，该发送器1005具体用于向至少一个候选辅基站中的每个候选 辅基站发送提前准备指示信息，该提前准备指示信息用于指示至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于该至少一个候选辅基站中的每个候选辅基等待用户设备UE将其选定为目标辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
应理解，在本发明实施例中，该处理器1001可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器1001还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器1002可以包括只读存储器和随机存取存储器，并向处理器1001提供指令和数据。存储器1002的一部分还可以包括非易失性随机存取存储器。例如，存储器1002还可以存储设备类型的信息。
该总线系统1003除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统1003。
在实现过程中，上述方法的各步骤可以通过处理器1001中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1002，处理器1001读取存储器1002中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站为UE预配置的随机接入资源的信息和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为一个实施例，该发送器1005还用于：向UE发送第一指 示消息，该第一指示消息用于指示UE进行切换的切换触发条件，该切换触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；上述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
可选地，作为一个实施例，该处理器1001还用于：根据至少一个候选辅基站中每个候选辅基站的当前状态信息，确定至少一个候选辅基站中每个候选辅基站的优先级信息；该发送器1005还用于向UE发送至少一个候选辅基站中每个候选辅基站的优先级信息，以便于UE根据至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至该至少一个候选辅基站中的目标辅基站。
可选地，作为一个实施例，该处理器1001还用于：确定UE与目标辅基站之间完成接入过程；该发送器1005用于将数据发送至目标辅基站，以便于UE与目标辅基站进行数据传输。
可选地，作为一个实施例，该接收器1004还用于：用于接收UE发送的第二指示消息，第二指示消息用于指示UE成功接入目标辅基站；和/或该接收器1004用于接收目标辅基站发送的第三指示消息，第三指示消息用于指示UE成功接入目标辅基站。
可选地，作为本发明一个实施例，网络设备1000为小站控制器，该接收器1004还用于接收主基站发送的UE的测量报告，测量报告包括UE对多个辅基站的测量结果；该处理器1001用于根据测量报告，从多个辅基站中确定至少一个候选辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
如图11所示，本发明实施例还提供了一种网络设备1100，该网络设备1100包括处理器1101、存储器1102、总线系统1103、接收器1104和发送器1105。其中，处理器1101、存储器1102和接收器1104通过总线系统1103 相连，该存储器1102用于存储指令，该处理器1101用于执行该存储器1102存储的指令，并控制该接收器1104接收信息。其中，该接收器1104用于：接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，该至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待所述UE将其选定为目标辅基站，该路径切换准备包括下列至少一种：为UE预配置接入资源，以及与网络设备之间建立数据传输通道；该处理器1101用于UE在需要进行辅基站切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息切换至该至少一个候选辅基站中的目标辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
应理解，在本发明实施例中，该处理器1101可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器1101还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器1102可以包括只读存储器和随机存取存储器，并向处理器1101提供指令和数据。存储器1102的一部分还可以包括非易失性随机存取存储器。例如，存储器1102还可以存储设备类型的信息。
该总线系统1103除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统1103。
在实现过程中，上述方法的各步骤可以通过处理器1101中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1102，处理器1101读取存储器1102中的信息， 结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为本发明一个实施例，上述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：每个候选辅基站的标识信息、每个候选辅基站为UE预配置的随机接入资源的信息、每个候选辅基站为UE分配的UE标识和每个候选辅基站为UE预配置的上行授权信息。
可选地，作为一个实施例，该接收器1004还用于：接收网络设备发送的第一指示消息，并根据第一指示消息确定UE需要进行辅基站切换，第一指示消息用于指示UE进行切换时的切换触发条件，该触发条件包括以下条件中的至少一种：UE当前接入的辅基站的信号质量低于第一阈值；至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；UE当前接入的辅基站的负载高于第三阈值；至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
可选地，作为一个实施例，该接收器1004还用于：接收网络设备发送的第二指示消息，其中，第二指示消息携带至少一个候选辅基站中每个辅基站的优先级信息；根据至少一个候选辅基站中每个辅基站的优先级信息确定目标辅基站；该处理器1101用于根据第二指示消息和目标辅基站的配置信息，切换至目标辅基站。
可选地，作为一个实施例，该发射器1105还用于：向网络设备发送UE的测量报告，测量报告用于网络设备根据测量报告确定目标辅基站；该接收器1104还用于接收网络设备的第三指示消息，并根据第三指示消息确定UE需要进行辅基站切换，第三指示消息用于指示UE切换至目标辅基站。
可选地，作为一个实施例，该发射器1105还用于：在UE在接入目标辅基站之后，向网络设备发送第四指示消息，第四指示消息用于指示UE成功接入目标辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
如图1200所示，本发明实施例还提供了一种网络设备1200，该网络设 备1200包括处理器1201、存储器1202、总线系统1203和发送器1204。其中，处理器1201、存储器1202和发送器1204通过总线系统1203相连，该存储器1202用于存储指令，该处理器1201用于执行该存储器1202存储的指令，并控制接收器1204接收信息。其中，该发送器1204用于：接收第一网络设备发送的提前准备指示信息，该提前准备指示信息用于指示网络设备进行路径切换准备，路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与第一网络设备之间建立与UE对应的数据传输通道；该处理器1201用于：根据提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
应理解，在本发明实施例中，该处理器1201可以是中央处理单元(Central Processing Unit，简称为“CPU”)，该处理器1201还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该存储器1202可以包括只读存储器和随机存取存储器，并向处理器1201提供指令和数据。存储器1202的一部分还可以包括非易失性随机存取存储器。例如，存储器1202还可以存储设备类型的信息。
该总线系统1203除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统1203。
在实现过程中，上述方法的各步骤可以通过处理器1201中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质 中。该存储介质位于存储器1202，处理器1201读取存储器1202中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为一个实施例，该发送器1204还用于：向第一网络设备发送提前准备完成消息，提前准备完成消息携带下列信息中的至少一种：网络设备为UE预配置的接入资源的信息、网络设备为UE分配的TEID。
可选地，作为一个实施例，该发送器1204还用于：当UE成功接入网络设备时，向第一网络设备发送指示信息，指示信息用于指示UE已经成功接入所述网络设备。
基于上述技术方案，本发明实施用于辅基站切换的方法、网络设备和用户设备，通过网络设备指示至少一个候选辅基站中每个候选辅基站提前进行路径切换准备，以便于用户设备在需要进行路径切换时，根据至少一个候选辅基站中每个候选辅基站的配置信息进行切换。因此，本发明实施例能够降低由于网络中辅基站小区覆盖过小，小区切换频繁而造成的移动性恶化问题。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (32)

  1. 一种用于辅基站切换的方法，其特征在于，包括：
    网络设备向至少一个候选辅基站中的每个候选辅基站发送提前准备指示，所述提前准备指示用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待用户设备UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入的资源，以及与网络设备之间建立数据传输通道；
    所述网络设备向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息，以便于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的所述目标辅基站。
  2. 根据权利要求1所述的方法，其特征在于，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：
    所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    向所述UE发送第一指示消息，所述第一指示消息用于指示所述UE进行切换的切换触发条件，所述切换触发条件包括以下条件中的至少一种：
    所述UE当前接入的辅基站的信号质量低于第一阈值；
    所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；
    所述UE当前接入的辅基站的负载高于第三阈值；
    所述至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，在向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息之前，所述方法还包括：
    根据所述至少一个候选辅基站中每个候选辅基站的当前状态信息，确定所述至少一个候选辅基站中每个候选辅基站的优先级信息；
    向所述UE发送所述至少一个候选辅基站中每个候选辅基站的优先级信 息，以便于所述UE根据所述至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至所述至少一个候选辅基站中的所述目标辅基站。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    确定所述UE与所述目标辅基站之间完成接入过程；
    将数据发送至所述目标辅基站，以便于所述UE与所述目标辅基站进行数据传输。
  6. 根据权利要求5所述的方法，其特征在于，所述确定所述UE与所述第四辅基站之间完成接入过程，包括：
    接收所述UE发送的第二指示消息，所述第二指示消息用于指示所述UE成功接入所述目标辅基站；和/或
    接收所述目标辅基站发送的第三指示消息，所述第三指示消息用于指示所述UE成功接入所述目标辅基站。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述网络设备为小站控制器，在所述向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息之前，所述方法还包括：
    接收主基站发送的所述UE的测量报告，所述测量报告包括所述UE对多个辅基站的测量结果；
    根据所述测量报告，从所述多个辅基站中确定所述至少一个候选辅基站。
  8. 一种用于辅基站切换的方法，其特征在于，包括：
    用户设备UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，所述至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待所述UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置接入资源，以及与网络设备之间建立数据传输通道；
    所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的所述目标辅基站。
  9. 根据权利要求8所述的方法，其特征在于，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：
    所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
  10. 根据权利要求8或9所述的方法，其特征在于，所述方法还包括：
    接收所述网络设备发送的第一指示消息，并根据所述第一指示消息确定所述UE需要进行辅基站切换，所述第一指示消息用于指示所述UE进行切换时的切换触发条件，所述触发条件包括以下条件中的至少一种：
    所述UE当前接入的辅基站的信号质量低于第一阈值；
    所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；
    所述UE当前接入的辅基站的负载高于第三阈值；
    所述至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
  11. 根据权利要求10所述的方法，其特征在于，所述在所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的目标辅基站，包括：
    接收所述网络设备发送的第二指示消息，其中，所述第二指示消息携带所述至少一个候选辅基站中每个辅基站的优先级信息；
    根据所述至少一个候选辅基站中每个辅基站的优先级信息确定所述目标辅基站；
    根据所述第二指示消息和所述目标辅基站的配置信息，切换至所述目标辅基站。
  12. 根据权利要求8或9所述的方法，其特征在于，在所述UE接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息之后，所述方法还包括：
    向所述网络设备发送所述UE的测量报告，所述测量报告用于所述网络设备根据所述测量报告确定所述目标辅基站；
    接收所述网络设备的第三指示消息，并根据所述第三指示消息确定所述UE需要进行辅基站切换，所述第三指示消息用于指示所述UE切换至所述目标辅基站。
  13. 根据权利要求8至12中任一项所述的方法，其特征在于，所述方法还包括：
    所述UE在接入所述目标辅基站之后，向所述网络设备发送第四指示消 息，所述第四指示消息用于指示所述UE成功接入所述目标辅基站。
  14. 一种用于辅基站切换的方法，其特征在于，包括：
    辅基站接收网络设备发送的提前准备指示信息，所述提前准备指示信息用于指示所述辅基站进行路径切换准备，所述路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与所述网络设备之间建立与所述UE对应的数据传输通道；
    根据所述提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    向所述网络设备发送提前准备完成消息，所述提前准备完成消息携带下列信息中的至少一种：所述辅基站为所述UE预配置的接入资源的信息、所述辅基站为所述UE分配的通用分组无线系统隧道协议隧道标识GTP TEID。
  16. 根据权利要求14或15所述的方法，其特征在于，所述方法还包括：
    当所述UE成功接入所述辅基站时，所述辅基站向所述网络设备发送指示信息，所述指示信息用于指示所述UE已经成功接入所述辅基站。
  17. 一种网络设备，其特征在于，包括：
    确定单元，所述确定单元用于确定向至少一个候选辅基站中的每个候选辅基站发送提前准备指示信息，所述提前准备指示信息用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待用户设备UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入资源，以及与网络设备之间建立数据传输通道；
    发送单元，所述发送单元用于向所述至少一个候选辅基站中的每个候选辅基站发送所述提前准备指示信息，所述提前准备指示信息用于指示所述至少一个候选辅基站中的每个候选辅基站进行路径切换准备，以便于所述至少一个候选辅基站中的每个候选辅基等待所述UE将其选定为所述目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置进行接入资源，以及与网络设备之间建立数据传输通道；
    所述发送单元还用于向所述UE发送所述至少一个候选辅基站中每个候选辅基站的配置信息，以便于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候 选辅基站中的所述目标辅基站。
  18. 根据权利要求16所述的网络设备，其特征在于，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：
    所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
  19. 根据权利要求17或18所述的网络设备，其特征在于，所述发送单元还用于向所述UE发送第一指示消息，所述第一指示消息用于指示所述UE进行切换的切换触发条件，所述切换触发条件包括以下条件中的至少一种：
    所述UE当前接入的辅基站的信号质量低于第一阈值；
    所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；
    所述UE当前接入的辅基站的负载高于第三阈值；
    所述至少一个候选辅基站中的第二候选辅基站的信号质量低于第四阈值。
  20. 根据权利要求17至19中任一项所述的网络设备，其特征在于，包括：
    所述确定单元还用于根据所述至少一个候选辅基站中每个候选辅基站的当前状态信息，确定所述至少一个候选辅基站中每个候选辅基站的优先级信息；
    所述发送单元还用于向所述UE发送所述至少一个候选辅基站中每个候选辅基站的优先级信息，以便于所述UE根据所述至少一个候选辅基站中每个候选辅基站的优先级信息，优先切换至所述至少一个候选辅基站中的所述目标辅基站。
  21. 根据权利要求17至20中任一项所述的网络设备，其特征在于，包括：
    所述确定单元还用于确定所述UE与所述目标辅基站之间完成接入过程；
    所述发送单元还用于将数据发送至所述目标辅基站，以便于所述UE与所述目标辅基站进行数据传输。
  22. 根据权利要求21所述的网络设备，其特征在于，所述设备还包括：
    第一接收单元，所述第一接收单元用于接收所述UE发送的第二指示消息，所述第二指示消息用于指示所述UE成功接入所述目标辅基站；和/或
    所述第一接收单元用于接收所述目标辅基站发送的第三指示消息，所述第三指示消息用于指示所述UE成功接入所述目标辅基站。
  23. 根据权利要求17至22中任一项所述的网络设备，其特征在于，所述网络设备为小站控制器，网络设备还包括：
    第二接收单元，所述第二接收单元用于接收主基站发送的所述UE的测量报告，所述测量报告包括所述UE对多个辅基站的测量结果；
    所述确定单元还用于根据所述测量报告，从所述多个辅基站中确定所述至少一个候选辅基站。
  24. 一种用户设备，其特征在于，包括：
    接收单元，所述接收单元用于接收网络设备发送的至少一个候选辅基站中每个候选辅基站的配置信息，所述至少一个候选辅基站中的每个候选辅基站已完成路径切换准备并等待所述UE将其选定为目标辅基站，所述路径切换准备包括下列至少一种：为所述UE预配置接入资源，以及与网络设备之间建立数据传输通道；
    切换单元，所述切换单元用于所述UE在需要进行辅基站切换时，根据所述至少一个候选辅基站中每个候选辅基站的配置信息切换至所述至少一个候选辅基站中的目标辅基站。
  25. 根据权利要求24所述的用户设备，其特征在于，所述至少一个候选辅基站中每个候选辅基站的配置信息包括下列中的至少一种：
    所述每个候选辅基站为所述UE预配置的接入资源的信息和所述每个候选辅基站为所述UE预配置的上行授权信息。
  26. 根据权利要求24或25所述的用户设备，其特征在于，所述接收单元还用于接收所述网络设备发送的第一指示消息，并根据所述第一指示消息确定所述UE需要进行辅基站切换，所述第一指示消息用于指示所述UE进行切换时的切换触发条件，所述触发条件包括以下条件中的至少一种：
    所述UE当前接入的辅基站的信号质量低于第一阈值；
    所述至少一个候选辅基站中的第一候选辅基站的信号质量高于第二阈值；
    所述UE当前接入的辅基站的负载高于第三阈值；
    所述至少一个候选辅基站中的第二候选辅基站的负载低于第四阈值。
  27. 根据权利要求26所述的用户设备，其特征在于，所述接收单元具体用于：接收所述网络设备发送的第二指示消息，其中，所述第二指示消息携带所述至少一个候选辅基站中每个辅基站的优先级信息；根据所述至少一个候选辅基站中每个辅基站的优先级信息确定所述目标辅基站；
    所述切换单元具体用于根据所述第二指示消息和所述目标辅基站的配置信息，切换至所述目标辅基站。
  28. 根据权利要求24或25所述的网络设备，其特征在于，所述设备还包括：
    发送单元，所述发送单元用于向所述网络设备发送所述UE的测量报告，所述测量报告用于所述网络设备根据所述测量报告确定所述目标辅基站；
    所述接收单元还用于接收所述网络设备的第三指示消息，并根据所述第三指示消息确定所述UE需要进行辅基站切换，所述第三指示消息用于指示所述UE切换至所述目标辅基站。
  29. 根据权利要求24至27中任一项所述的用户设备，其特征在于，所述设备还包括：
    发送单元，所述发送单元用于在所述UE在接入所述目标辅基站之后，向所述网络设备发送第四指示消息，所述第四指示消息用于指示所述UE成功接入所述目标辅基站。
  30. 一种网络设备，其特征在于，包括：
    接收单元，所述接收单元用于接收第一网络设备发送的提前准备指示信息，所述提前准备指示信息用于指示所述网络设备进行路径切换准备，所述路径切换准备包括下列中的至少一种：为用户设备UE预配置接入资源，以及与所述第一网络设备之间建立与所述UE对应的数据传输通道；
    切换单元，根据所述提前准备指示信息，进行路径切换准备并等待所述UE切换至所述辅基站。
  31. 根据权利要求30所述的网络设备，其特征在于，所述设备还包括：
    发送单元，所述发送单元向所述第一网络设备发送提前准备完成消息，所述提前准备完成消息携带下列信息中的至少一种：所述网络设备为所述UE预配置的接入资源的信息、所述网络设备为所述UE分配的通用分组无线系统隧道协议隧道标识GTP TEID。
  32. 根据权利要求31所述的网络设备，其特征在于，所述发送单元还用于：
    当所述UE成功接入所述网络设备时，向所述第一网络设备发送指示信息，所述指示信息用于指示所述UE已经成功接入所述网络设备。
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