WO2018228126A1 - 一种基于dc的切换方法及设备 - Google Patents

一种基于dc的切换方法及设备 Download PDF

Info

Publication number
WO2018228126A1
WO2018228126A1 PCT/CN2018/087427 CN2018087427W WO2018228126A1 WO 2018228126 A1 WO2018228126 A1 WO 2018228126A1 CN 2018087427 W CN2018087427 W CN 2018087427W WO 2018228126 A1 WO2018228126 A1 WO 2018228126A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
handover
ambr
source base
target base
Prior art date
Application number
PCT/CN2018/087427
Other languages
English (en)
French (fr)
Inventor
晋英豪
谭巍
韩锋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18818705.8A priority Critical patent/EP3634036B1/en
Publication of WO2018228126A1 publication Critical patent/WO2018228126A1/zh
Priority to US16/713,489 priority patent/US11252615B2/en

Links

Images

Classifications

    • 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
    • H04W36/0005—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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells
    • 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
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H04W36/28—Reselection being triggered by specific parameters by agreed or negotiated communication parameters involving a plurality of connections, e.g. multi-call or multi-bearer connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a DC-based switching method and device.
  • the handover process is mainly divided into three parts, a handover preparation phase, a handover execution phase, and a handover completion phase.
  • a handover preparation phase there is no connection between the user equipment and the source base station (source eNB/gNB) (ie, the connection between the user equipment and the source base station is disconnected at this stage), but there is no target base station at this time.
  • target eNB/gNB establishes a connection, so at this stage, the user equipment does not receive any data on the network side, thereby causing interruption of data or handover delay.
  • DC Dual Connectivity
  • the present application provides a DC-based handover method and apparatus for coordinating user equipment capabilities between a source base station (or a source cell) and a target base station (or a target cell) by a source base station and/or a target base station, thereby preventing DC-based When switching, the technical problem of the user equipment capability is not exceeded.
  • the user capability may include a user equipment aggregate maximum bit rate (UE-AMBR) and network slice information of the UE.
  • UE-AMBR user equipment aggregate maximum bit rate
  • the coordinated UE-AMBR allocates the UE-AMBR between the source base station (or the source cell) and the target base station (or the target cell), and ensures the DC handover when the source base station (or source) is coordinated by the coordinated UE-AMBR.
  • the cell does not exceed the UE-AMBR when communicating with the target base station (or target cell) simultaneously with the UE.
  • Coordinating the UE's network slice information is to notify the network side of at least one network slice that the UE currently allows the UE to access or the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access, by coordinating the UE.
  • the network slice information enables the target base station (or the target cell) to perform access verification on the UE, and causes the target base station (or target cell) to find a more suitable target cell (or target base station) for the next handover.
  • whether DC is used in the present application and which DC is used for handover may be determined by the source base station or determined by the target base station, which may increase the flexibility of DC handover.
  • the information exchanged during the handover process may also include a GPRS tunneling protocol (GTP) tunnel port identifier (each tunnel) for the target base station to transmit uplink packet data convergence to the source base station.
  • GTP GPRS tunneling protocol
  • Packet Data Convergence Protocol (PDCP) data packet such as a PDCP packet data unit (PDU) or a PDCP data packet used by the source base station to transmit downlink packets to the target base station, such as PDCP PUD; information exchanged during handover
  • the device may also include timing information or trigger information, which is used to indicate that the user equipment re-sets a preset time or a preset trigger condition to release the connection with the source base station, thereby saving air interface resources.
  • a dual-connected DC-based handover method includes: a source base station sends a handover request to a target base station, where the handover request carries a target base station user equipment to aggregate a maximum bit rate UE-AMBR and/or a user.
  • the network slice information of the device UE; the source base station receives the handover request feedback sent by the target base station.
  • the target base station UE-AMBR is obtained by the source base station according to the received UE-AMBR.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a supported maximum network. The number of slices.
  • the allowed network slice indication is used to indicate that the network side allows at least one network slice that the UE accesses in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • the handover request further carries at least one of a handover type identifier and a target eNB based on a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback carries a GTP tunnel port identifier of the target base station based on each bearer.
  • the handover method further includes: the source base station sending a handover message to the UE.
  • the handover message carries one or more of the following information, a handover type identifier, timing information, and trigger information, where the handover type identifier is used to indicate that the handover is The DC-based switching, the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, and the trigger information is used to indicate that the user equipment releases the trigger connected to the source base station. condition.
  • a second aspect provides a DC-based handover method, where the handover method includes: receiving, by a target base station, a handover request sent by a source base station, where the handover request carries network slice information of a target base station UE-AMBR and/or a UE; The base station establishes communication with the UE according to the target base station UE-AMBR and/or the network slice information.
  • the handover method further includes: the target base station sends a handover request feedback to the source base station, where The handover request feedback carries the target base station based on the GTP tunnel port identifier of each bearer.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a supported maximum network. The number of slices.
  • the allowed network slice indication is used to indicate that the network side allows at least one network slice that the UE accesses in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • the handover request further carries at least one of a handover type identifier and a target eNB based on a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the third aspect provides a DC-based handover method, where the handover method includes: the user equipment sends a measurement report to the source base station; the user equipment receives the handover message sent by the source base station, where the handover message carries the following information.
  • One or more of the switching type identifier, the timing information, and the triggering information where the switching type identifier is used to indicate that the handover is a DC-based handover, and the timing information is used to indicate that the user equipment is preset. After the time is reached, the connection with the source base station is released, and the triggering information is used to indicate that the user equipment releases the trigger condition that is connected to the source base station.
  • the fourth aspect provides a DC-based handover method, where the handover method includes: the target base station receives a handover request sent by the source base station; and the target base station sends a handover request feedback to the source base station according to the handover request, where the handover request is performed.
  • the feedback carries the source base station UE-AMBR, and the source base station UE-AMBR is the AMBR when the source base station communicates with the UE.
  • the handover request carries, the handover type identifier, and the source base station are based on at least one of a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback further carries, at least one of a handover type identifier and a target base station based on a GTP tunnel port identifier of each bearer, where the handover type The identification is used to indicate that the handover is a DC based handover.
  • the handover type identifier is determined by the target base station according to user equipment capabilities.
  • the source base station UE-AMBR is obtained by the target base station according to the received source base station or the UE-AMBR sent by the UE.
  • the fifth aspect provides a DC-based handover method, where the handover method includes: the source base station sends a handover request to the target base station, where the handover request carries the UE-AMBR; and the source base station receives the handover request feedback sent by the target base station, The handover request feedback carries a source base station UE-AMBR; the source base station keeps a connection with the UE according to the source base station UE-AMBR.
  • the handover request carries one or more of the following information, a handover type identifier, a network slice information of the UE, and a GPRS tunnel based on each bearer of the source base station.
  • the handover method further includes: the source base station sending a handover message to the UE.
  • the handover message carries one or more of the following information, a handover type identifier, timing information, and trigger information, where the handover type identifier is used to indicate that the handover is The DC-based switching, the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, and the trigger information is used to indicate that the user equipment releases the trigger connected to the source base station. condition.
  • a sixth aspect provides a base station supporting DC handover, where the base station includes: a receiver, a transmitter, a memory, and a processor, where the memory stores an instruction, when the processor executes the instruction, causing The transmitter sends a handover request to the target base station, where the handover request carries network slice information of the target base station UE-AMBR and/or the UE; and the receiver receives the handover request feedback sent by the target base station.
  • the target base station UE-AMBR is obtained by the processor according to the UE-AMBR received by the receiver.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a supported maximum network. The number of slices.
  • the allowed network slice indication is used to indicate that the network side allows at least one network slice that the UE accesses in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • the handover request further carries at least one of a handover type identifier and a target eNB based on a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback carries a GTP tunnel port identifier of the target base station based on each bearer.
  • the transmitter is further configured to send a handover message to the UE.
  • the handover message carries one or more of the following information, a handover type identifier, timing information, and trigger information, where the handover type identifier is used to indicate that the handover is The DC-based switching, the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, and the trigger information is used to indicate that the user equipment releases the trigger connected to the source base station. condition.
  • a seventh aspect provides a base station supporting DC handover, where the base station includes: a receiver, a transmitter, a memory, and a processor, where the memory stores an instruction, when the processor executes the instruction, causing a handover request sent by the receiver source base station, the handover request carrying network slice information of the target base station UE-AMBR and/or the UE; the receiver and the transmitter according to the target base station UE-AMBR and/or The network slice information establishes communication with the UE.
  • the transmitter further sends a handover request feedback to the source base station, where the handover request feedback carries the GTP tunnel port identifier of the target base station based on each bearer.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a supported maximum network. The number of slices.
  • the allowed network slice indication is used to indicate at least one network slice that the network side allows the UE to access in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • the handover request further carries at least one of a handover type identifier and a target eNB based on a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • a DC-based UE includes: a transceiver, a memory, and a processor, where the memory stores an instruction, when the processor executes the instruction, causing the transceiver to The source base station sends a measurement report; the transceiver receives the handover message sent by the source base station, where the handover message carries one or more of the following information, a handover type identifier, timing information, and trigger information, where the The switching type identifier is used to indicate that the handover is a DC-based handover, and the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, and the trigger information is used to indicate that the user equipment is released.
  • a trigger condition connected to the source base station.
  • a ninth aspect a base station based on DC switching, where the base station includes: a receiver, a transmitter, a memory, and a processor, where the memory stores an instruction, when the processor executes the instruction, causing The receiver receives a handover request sent by the source base station; the sender sends a handover request feedback to the source base station according to the handover request, the handover request feedback carries a source base station UE-AMBR, and the source base station UE-AMBR is the The AMBR when the source base station communicates with the UE.
  • the handover request carries, the handover type identifier, and the source base station are based on at least one of a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback further carries, at least one of a handover type identifier and a target base station based on a GTP tunnel port identifier of each bearer, where the handover type The identification is used to indicate that the handover is a DC based handover.
  • the handover type identifier is determined by the processor according to a user equipment capability.
  • the source base station UE-AMBR is obtained by the processor according to the source base station or the UE-AMBR sent by the UE received by the receiver.
  • a tenth aspect provides a base station based on DC handover, the base station includes: a receiver, a transmitter, a memory, and a processor, where the memory stores an instruction, when the processor executes the instruction, causing,
  • the transmitter sends a handover request to the target base station, where the handover request carries the UE-AMBR; the receiver receives the handover request feedback sent by the target base station, and the handover request feedback carries the source base station UE-AMBR; the transmitter according to the The source base station UE-AMBR remains connected to the UE.
  • the handover request carries one or more of the following information, a handover type identifier, network slice information of the UE, and the GPRS tunnel of the source base station based on each bearer.
  • the transmitter is further configured to send a handover message to the UE, where the handover message carries one or more of the following information, a handover type identifier, timing information, and
  • the triggering information is used to indicate that the handover is a DC-based handover
  • the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, where the trigger information is used.
  • the triggering condition is indicated to indicate that the user equipment releases the connection with the source base station.
  • a readable storage medium comprising instructions for implementing the method of one or more of the following aspects when the instructions are executed, the first aspect, the second aspect, the fourth aspect And the fifth aspect.
  • a readable storage medium comprising instructions for implementing the method of the third aspect when the instructions are executed.
  • a computer program product comprising instructions, when run on a computer, causes the computer to perform the method described in one or more of the following aspects, the first aspect, the second aspect, the fourth aspect and The fifth aspect.
  • a computer program product comprising instructions for causing a computer to perform the method of the third aspect when executed on a computer is provided.
  • a system comprising the base station of the fifth aspect and the sixth aspect described above.
  • a system comprising the base station of the eighth aspect and the ninth aspect.
  • a dual connectivity DC based base station comprising:
  • a sending unit configured to send a handover request to the target base station, where the handover request carries the network slice information of the target base station user equipment to aggregate the maximum bit rate UE-AMBR and/or the user equipment UE, and the receiving unit is configured to receive the target base station to send Switch request feedback.
  • the base station further includes an acquiring unit, where the acquiring unit is configured to acquire the target base station UE-AMBR according to the received UE-AMBR.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a maximum supported The number of network slices.
  • the allowed network slice indication is used to indicate that the network side allows at least one network slice that the UE accesses in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of supported network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • the handover request further carries at least one of a handover type identifier and a target eNB based on a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where The handover type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback carries a GTP tunnel port identifier of the target base station based on each bearer.
  • the sending unit is further configured to send a handover message to the UE, where the handover message carries one or more of the following information, a handover type identifier, and timing information.
  • the trigger information is used to indicate that the handover is a DC-based handover
  • the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, the trigger information.
  • a triggering condition for instructing the user equipment to release the connection with the source base station.
  • the eighteenth aspect provides a base station that is based on a DC handover, where the base station includes: a receiving unit, configured to receive a handover request sent by a source base station, where the handover request carries network slice information of a target base station UE-AMBR and/or a UE; Establishing a communication unit, configured to establish communication with the UE according to the target base station UE-AMBR and/or the network slice information.
  • the base station further includes: a sending unit, configured to send a handover request feedback to the source base station, where the handover request feedback carries the target base station based on each bearer GTP Tunnel port ID.
  • the target base station UE-AMBR is an AMBR when the target base station communicates with the UE;
  • the network slice information includes an allowed network slice indication or a maximum supported The number of network slices.
  • the allowed network slice indication is used to indicate at least one network slice that the network side allows the UE to access in a registration area or a tracking area to which the source cell belongs;
  • the maximum number of supported network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access.
  • a UE that is based on a DC handover, the UE includes: a sending unit, configured to send a measurement report to a source base station, and a receiving unit, configured to receive a handover message sent by the source base station, where the handover
  • the message carries one or more of the following information, a switch type identifier, a timing information, and a trigger information, where the switch type identifier is used to indicate that the handover is a DC-based handover, and the timing information is used to indicate the user.
  • the device releases the connection with the source base station after the preset time is reached, and the triggering information is used to indicate that the user equipment releases the trigger condition that is connected to the source base station.
  • the base station includes: a receiving unit, configured to receive a handover request sent by a source base station, and a sending unit, configured to send a handover request feedback to the source base station, where the handover request is feedback
  • the source base station UE-AMBR is carried, and the source base station UE-AMBR is an AMBR when the source base station communicates with the UE.
  • the handover request carries, the handover type identifier, and the source base station are based on at least one of a GPRS tunneling protocol GTP tunnel port identifier of each bearer, where The handover type identifier is used to indicate that the handover is a DC based handover.
  • the handover request feedback further carries, at least one of a handover type identifier and a target base station based on a GTP tunnel port identifier of each bearer, where the handover The type identifier is used to indicate that the handover is a DC based handover.
  • the base station further includes a determining unit, where the determining unit is configured to determine the handover type identifier according to user equipment capabilities.
  • the base station further includes an acquiring unit, where the acquiring unit is configured to acquire the source base station according to the received source base station or the UE-AMBR sent by the UE. UE-AMBR.
  • a DC-based base station configured to include: a sending unit, configured to send a handover request, where the handover request carries a UE-AMBR, and a receiving unit, configured to receive a handover request feedback sent by the target base station
  • the handover request feedback carries a source base station UE-AMBR
  • a connection maintaining unit is configured to maintain a connection with the UE according to the source base station UE-AMBR.
  • the handover request carries one or more of the following information, a handover type identifier, network slice information of the UE, and the source base station based on each bearer.
  • GPRS tunneling protocol GTP tunnel port identifier; wherein the handover type identifier is used to indicate that the handover is a DC-based handover.
  • the sending unit is further configured to send a handover message to the UE, where the handover message carries one or more of the following information, a handover type identifier, and a timing The information and the triggering information, where the switching type identifier is used to indicate that the handover is a DC-based handover, and the timing information is used to indicate that the user equipment releases the connection with the source base station after the preset time is reached, the triggering The information is used to indicate that the user equipment releases a trigger condition that is connected to the source base station.
  • FIG. 1 is a schematic structural diagram of a communication network to which the present application is applied.
  • FIG. 2 is a schematic flow chart of a non-DC based handover in the prior art.
  • FIG. 3 is a schematic flow chart of DC-based handover in the prior art.
  • FIG. 4 is a schematic diagram of a DC-based handover procedure provided by the present application.
  • FIG. 5 is a schematic structural diagram of a DC switch-based protocol stack provided by the present application.
  • FIG. 6 is a schematic diagram of another DC-based handover procedure provided by the present application.
  • FIG. 7 is a schematic structural diagram of an apparatus 100 provided by the present application.
  • FIG. 8 is a schematic structural diagram of a base station 1000 provided by the present application.
  • FIG. 9 is a schematic structural diagram of a UE2000 according to the present application.
  • the source base station is a base station that communicates with the UE before the base station handover, and may be referred to as a source eNB in the LTE network, and may be referred to as a source gNB at 5G or NR (new radio).
  • the target base station is a base station that communicates with the UE after successful base station handover. It may be referred to as a target eNB in the LTE network, and may be referred to as a target gNB at 5G or NR (new radio). It should be understood that the foregoing is only an example of the names of the source base station and the target base station, which is not limited in this application.
  • the representation of the source base station sometimes includes the source base station (or the source cell), and the representation of the target base station sometimes includes the target base station or the target cell.
  • the source base station and the target base station can be understood by those skilled in the art without departing from the present application. The specific meaning.
  • UE is a device that provides voice and/or data connectivity to users, and may include various terminals having wireless communication functions, handheld devices, in-vehicle devices, wearable devices, computing devices, or connected to a wireless modem. Other processing devices, as well as various forms of user equipment, mobile stations (MS), transmission and receiver points (TRP or transmission point, TP), and the like.
  • MS mobile stations
  • TRP transmission and receiver points
  • TP transmission point
  • UE capability may include any one or more of the following: power control, such as UE-AMBR, code resource, UE mode, calculation, packet data convergence layer protocol (Packet Data) Convergence Protocol (PDCP) capabilities, network slice information, and more. These capabilities are known to the network in order to manage the radio resources of the UE.
  • power control such as UE-AMBR, code resource, UE mode, calculation, packet data convergence layer protocol (Packet Data) Convergence Protocol (PDCP) capabilities, network slice information, and more.
  • PDCP Packet Data Convergence Protocol
  • UE-AMBR is a kind of user capability, and also a QoS parameter. It is used to indicate the maximum aggregate bit rate allowed by all non-guaranteed bit rate (Non-GBR) services (such as all flow services) of a UE.
  • the target base station UE-AMBR is an AMBR that the UE allows the target base station (or target cell) to communicate with when the target base station (or target cell) communicates with the UE;
  • the source base station UE-AMBR is the source base station (or source cell) that communicates with the UE At the time, the UE allows the source base station (or source cell) to communicate with the AMBR.
  • the UE When the UE is still connected to the source base station (or the source cell) while establishing a connection with the target base station (or the target cell), the sum of the target base station UE-AMBR and the source base station UE-AMBR cannot exceed the UE-AMBR, therefore, When the UE establishes a connection with the target base station (or the target cell) and remains connected to the source base station (or the source cell), the source base station or the target base station needs to allocate the UE-AMBR for both.
  • Network slice information which may include an allowed network slice indication or a maximum number of supported network slices.
  • the network slice information of the base station may be sent to the core network, the UE, or other base stations, and the present application does not limit this.
  • the maximum number of supported network slices is the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access, indicating a capability of the UE network slice.
  • the allowed network slice indication information indicates at least one network slice allowed by the network side to be accessed by the UE in a registration area or a tracking area to which the source cell belongs, or for a public land mobile network PLMN (The pubic land mobile network (PLMN) network side allows at least one network slice that the UE accesses in the registration area or the tracking area to which the source cell belongs.
  • the source cell is a cell that the source base station belongs to communicate with the UE before performing handover.
  • the allowed network slice indication can be represented by at least one of the following parameters:
  • Network slice type information can be used to indicate enhanced mobile broadband services (eMBB), ultra-reliable low latency communication (URLC), massive machine type communication ( Massive slice type communication, mMTC), etc.
  • the network slice type information may also indicate an end-to-end network slice type, including
  • the network slice type to the CN may also refer to the network ((R)AN) side network slice type or the CN side network slice type;
  • Business type information is related to specific business.
  • the service type information may indicate service characteristics such as a video service, a car network service, a voice service, or a specific service;
  • Tenant (Tenant) information used to indicate the customer information of creating or renting the network slice, such as the customer is Tencent, the State Grid, etc.;
  • User group information used to indicate grouping information for grouping users according to a certain characteristic, for example, according to a user's level or the like;
  • Slice group information used to indicate that according to a certain feature, for example, all network slices that the UE can access may be used as one slice group, or groups of network slices may be divided according to other standards;
  • the network segment instance information is used to indicate the instance identifier and the feature information created for the network slice.
  • the network slice instance may be assigned an identifier to indicate the network slice instance, or may be based on the network slice instance identifier.
  • a new identifier is mapped to the network slice instance, and the receiver can identify the specific network slice instance indicated by the identifier according to the identifier.
  • a Dedicated Core Network (DCN) identifier which is used to uniquely indicate a proprietary core network in an LTE system or an eLTE system, such as an IoT-specific core network.
  • the DCN identifier may be mapped to the network slice identifier, and the network slice identifier may be mapped by the DCN identifier, and the DCN identifier may also be mapped by using the network slice identifier.
  • the network side allows the UE to access multiple network slices in a registration area or a tracking area to which the source cell belongs, or for a public land mobile network PLMN (pubic land mobile network, PLMN)
  • PLMN public land mobile network
  • the network side allows the UE to access multiple network slices in the registration area or tracking area to which the source cell belongs, and the allowed network slice indication includes a plurality of allowed network slice identifiers.
  • the S-NSSAI includes at least slice type/service type (SST) information, and optionally may include slice distinguishing information (Slice Differentiator, SD).
  • SST information is used to indicate the behavior of the network slice, such as the characteristics of the network slice and the service type.
  • the SD information is the complement information of the SST. If the SST is directed to multiple network slice implementations, the SD may correspond to a unique network slice. Example.
  • the network side allows the UE to access multiple network slices in a registration area or a tracking area to which the source cell belongs, or for a public land mobile network PLMN (pubic land mobile network, PLMN)
  • PLMN public land mobile network
  • the network side allows the UE to access multiple network slices in the registration area or tracking area to which the source cell belongs, and the allowed network slice indication includes a plurality of allowed S-NSSAIs.
  • the S-NSSAI group information is used to indicate that the grouping is performed according to a certain feature. For example, all network slices of a common AMF that the UE device can access may be used as an S-NSSAI group.
  • Temporary ID The temporary identification information is assigned by the AMF to the UE already registered on the CN side, and the Temporary ID can uniquely point to an AMF.
  • R-NSSAI (R)AN-NSSAI: Represents a specific set of S-NSSAIs, ie a specific set of S-NSSAIs. It should be understood that if the network side allows the UE to access multiple network slices in a registration area or a tracking area to which the source cell belongs, or for a public land mobile network PLMN (pubic land mobile network, PLMN) The network side allows the UE to access multiple network slices in the registration area or tracking area to which the source cell belongs, and the allowed network slice indication may include an identifier of a plurality of allowed R-NSSAI sets.
  • NSSAI contains multiple S-NSSAIs.
  • the specific coding format of the allowed network slice indication is not limited, and different fields of the interface message that can be carried between different devices respectively represent different allowed network slice indications, or may be replaced by abstracted index values, different The index values correspond to different network slices.
  • the network slice information may be other identifiers, which are not limited herein.
  • the allowed network slice indication may be in the form of a list of allowed network slice indications, for example, allowed network slice selection assistance information list, allowed NSSAI list), or allowed Single Network Slice Selection Assistance Information List (allowed S-NSSAI list).
  • the interaction in this application refers to the process in which the two parties exchange information with each other.
  • the information transmitted here may be the same or different.
  • the two parties are the source base station and the target base station, and the source base station may request information from the target base station, and the target base station provides the source base station with the information requested by the source base station.
  • the source base station and the target base station may also request information from each other, and the information requested here may be the same or different.
  • FIG. 1 is a schematic structural diagram of a communication network to which the present application is applicable.
  • FIG. 1 illustrates a 5G network scenario in a wireless communication network as an example. It should be noted that the solution in this application may also be applied to other wireless communication networks, and corresponding names may also be used in corresponding functions in other wireless communication networks. The name is replaced.
  • the communication network mainly includes a (radio) access network ((Radio) Access Network, (R) AN) and a core network (CN), and the control panel of the CN is mainly a mobility management function (Access). And mobility management (AMF), whose role is similar to MME in LTE.
  • R Radio) Access Network
  • CN core network
  • Access mobility management function
  • AMF mobility management
  • the evolved eNB can also access the 5G core network and support the functions of some 5G base stations. Due to the mobility of the UE, the connected UE in the ongoing session moves from the source base station (or the source cell) to the target base station (or the target cell) to generate a handover process, wherein the source base station is a base station connected to the UE before the handover, The target base station is a base station connected to the UE after handover.
  • FIG. 2 is a schematic flowchart of a non-DC-based handover in the prior art. For details, refer to Chapter 10 of 3GPP TS 36.300.
  • the existing handover is mainly divided into three parts, a handover preparation phase (from S304 to S306), a handover execution phase (S307 to S310), a handover completion phase (S311 to S314), and a whole handover execution phase, UE.
  • There is no connection between the source base station and the source base station ie, the connection between the UE and the source base station has been disconnected at this stage).
  • the handover method includes:
  • the source base station sends a handover request to the target base station, where the handover request carries the target base station user equipment to aggregate the maximum bit rate UE-AMBR and/or the network slice information of the user equipment UE; the source base station receives the target base station to send Switch request feedback.
  • the handover request may carry a target base station UE-AMBR (target gNB UE-AMBR), where the UE-AMBR is obtained by the source base station according to the received UE-AMBR, where the UE-AMBR may be a core network transmission, and the UE Or it is sent by other base stations to the source base station.
  • the target base station UE-AMBR is obtained by the source base station according to the UE-AMBR, the measurement report, and/or the resource usage status of the source base station, and the like.
  • the target base station establishes a connection with the UE according to the target base station UE-AMBR, and the source base station maintains a connection with the source base station according to the source base station UE-AMBR.
  • the source base station acquires the target base station UE-AMBR and the source base station UE-AMBR as 2
  • the relationship of 1: is that the target base station UE-AMBR is 60 (bps), and the source base station UE-AMBR is 30 (bps).
  • the source base station may also obtain the source base station UE-AMBR that the source base station can provide for the UE to be 20 (bps) according to the current resource usage status, and the source base station determines that the source base station UE-AMBR is 20 (bps), and the target base station UE.
  • -AMBR is 70 (bps).
  • the independent scheduling of the target base station and the source base station is prevented from generating more than the UE-AMBR (for example, the UE-AMBR is 50 (bps).
  • the target base station does not know, the target base station is allocated 40 for the UE. (bps), that is, the target base station UE-AMBR is 40 (bps), and the source base station allocates 20 (bps) to the UE, that is, the source base station UE-AMBR is 20 (bps), and the sum of the two is greater than 50 (bps). Coordinating the UE-AMBR by the source base station ensures smooth progress of the DC-based handover.
  • the handover request may carry network slice information of the UE.
  • the network slice information is received by the source base station from the core network or the UE, or received by other base stations, and sent to the target base station.
  • the target base station cannot obtain the information at the time of handover.
  • the target base station has the following technical effects: First, the right of the UE can be verified on the (R) AN side. For example, when the UE performs a radio resource control (RRC) connection request, if the carried network slice identifier does not belong to the identifier range allowed by the current network, the target base station may know that the network slice identifier carried by the UE is an invalid identifier.
  • RRC radio resource control
  • the target base station may find a more suitable target cell or target base station for the UE at the next handover. For example, when the UE wants to perform the next handover, the network slice to which the session belongs is the network slice 1, and the network slice that the current network allows the UE to access is the network slice 1, the network slice 2, and the network slice 3, then when the UE needs At the time of handover, the target base station (or target cell) (when the target base station (or target cell) in the last handover becomes the source base station (or source cell) in the upcoming handover) selects the next target cell for this UE ( Or the target base station) consider the network slice that the next target cell (or target base station) can support, if the next target cell (or target base station) 1 supports network slice 1, network slice 2, and network slice 3, and A target cell (or target base station) 2 supports network slice 1, network slice 2 and network slice 4, then if
  • the target base station receives the maximum number of network slices supported by the UE or the maximum number of network slices that the UE can simultaneously access, and can establish a session for the UE according to the information, if the UE wants to establish a network exceeding this number. If the session is sliced, the target base station will reject it.
  • the handover request may further carry the source base station based on the GTP tunnel port identifier of each bearer, and the target base station transmits the uplink Packet Data Convergence Protocol (PDCP) packet data unit (packet data) to the source base station. Unit, PDU).
  • PDCP Packet Data Convergence Protocol
  • PDU Packet Data Convergence Protocol
  • the reason why the GTP tunnel port identifier is to be carried is because the UE and the target base station complete the air interface connection for a period of time, and the connection on the core network side has not been switched from the source base station (or the source cell) to the target base station.
  • the target base station transmits to the core network. If the GTP tunnel port identifier is carried at this time, the uplink data can be transmitted to the core network through the source base station, thereby reducing the uplink data transmission delay caused by the handover.
  • the handover request may further carry a handover type identifier, where the handover type identifier is used to indicate that the handover is a DC-based handover.
  • the switch type identifier may also indicate which DC switch is based on the switch. By carrying the handover type identifier, the target base station knows the protocol stack required to communicate with the establishment of the connection procedure.
  • the DC may include DC-1A, DC-1B, DC-3C, DC-3B, and the like.
  • FIG. 5 is a schematic structural diagram of a DC switch-based protocol stack provided by the present application. As shown in FIG.
  • different DCs differ in that the protocol stacks are different, that is, the data flows transmitted by the target base station (also referred to as the second base station, second gNB, SgNB), which protocol stacks of the target base station.
  • the MCG is a master cell group, that is, a primary cell group
  • the SCG is a second cell group.
  • the protocol stack through which the data flows in the target base station includes a Service Data Adaptation Protocol (SDAP)/PDCP/RLC/MAC.
  • SDAP Service Data Adaptation Protocol
  • FIG. 5B in DC-3B, the protocol stack through which the data stream passes in the target base station includes RLC, MAC, and partial PDCP.
  • SDAP Service Data Adaptation Protocol
  • the protocol stack that the data stream passes in the target base station includes the RLC, the MAC, that is, the data transmitted by the target base station, passes through the source base station (also referred to as the first base station, the primary base station, and the MgNB).
  • the SDAP and PDCP are processed and transmitted to the target base station, and then sent by the RLC and MAC of the target base station.
  • S503 The source base station receives the handover request feedback sent by the target base station.
  • the handover request feedback carries the GTP tunnel port identifier of each target bearer based on each bearer.
  • the GTP tunnel port identifier is a GTP tunnel port identifier of the target base station for each received bearer, and is used by the source base station to transmit downlink PDCP PDUs to the target base station. If it is a DC-3C-based handover, it can be used to identify the data of each bearer, that is, which one is carried when the data is identified. This is similar to the GTP tunnel port identifier carried in the handover request, which can reduce the handover delay.
  • the handover method of the present application further includes: S504, the source base station sends a handover message to the user equipment, where the handover message may be a radio resource. Control RRC reconfiguration or handover command messages.
  • the handover message may include: a handover type identifier, used to indicate whether the handover is a DC-based handover, and an optional one, which is based on which DC handover is similar to carrying the handover type identifier in the handover request. For details, refer to the description of carrying the handover type identifier in the handover request.
  • the UE may know whether the handover is a DC-based handover and which DC handover is based.
  • the switching message may include: timing information, configured to indicate that the user equipment releases the connection with the source base station after the preset time is reached.
  • the UE acquires the time for releasing the connection of the source base station, and avoids being released until the radio link fails.
  • the timer may be started after receiving the handover information sent by the source base station, and when the timer expires, the terminal releases the connection with the source base station.
  • the timer may be started after the terminal establishes a connection with the target base station, and when the timer expires, the terminal releases the connection with the source base station. This solution does not impose specific restrictions on the startup time of the timer.
  • the radio link conditions are poor, it is no longer meaningful to communicate through the source base station. Because the air interface needs multiple retransmissions, the transmission succeeds, and the air interface resources are wasted.
  • the handover message may include trigger information, where the trigger information is used to indicate that the user equipment releases a trigger condition that is connected to the source base station, where the trigger condition may include a triggered condition or a trigger event.
  • the trigger information is determined by the source base station or the target base station. This embodiment is not limited. If it is determined by the target base station, it needs to be carried in the handover request feedback, and then sent by the source base station to the UE through the handover message.
  • the trigger information indicates that the connection between the source base station and the target base station is received when the signal of the source base station received by the UE is lower than a certain threshold, or the trigger information indicates that the signal difference between the source base station and the target base station received by the UE is reached.
  • the connection with the source base station is released, or when a radio link failure (RLF) occurs between the UE and the source base station, the connection with the source base station is released, or
  • the triggering information indicates that the number of RLC retransmissions between the terminal and the source base station reaches a certain threshold, and then the connection between the UE and the source base station is released, or the number of times of synchronization between the UE and the source base station reaches a certain threshold.
  • the UE releases its connection with the source base station. Release the connection in time to avoid waste of air interface resources.
  • timing information or the trigger information may be used to terminate the uplink data transmission between the UE and the source base station, and may also terminate the downlink data transmission between the UE and the source base station, and may also be used to terminate the UE and the source base station at the same time. Up and down data transmission between.
  • the timing information or the trigger information can let the UE know when to release the connection with the source base station and avoid invalid air interface retransmission. If the UE does not receive the timing information or the trigger information, it does not know when the connection with the source base station is released, which may result in invalid air interface retransmission. In one case, when the UE transmits the uplink data to the source base station, the handover process may be completed, that is, the source base station has released the context of the UE, so that the uplink transmission of the UE in the context of releasing the UE (UE context) is invalid, and if When the UE receives the above information, a similar situation can be avoided.
  • the UE does not retransmit, and the UE does not retransmit. It is not always retransmitted.
  • the target cell or target base station
  • the UE may be removed in a short time. The current target cell (or target base station) returns to the source cell. If the set timing information does not exceed this time, the UE can continue to receive the service after returning to the source cell without data interruption.
  • the source base station coordinates the UE capability between the source base station and the target base station, shares the network slice information, and indicates which switch is based on which the handover delay is reduced, and the waste of the air interface resources is avoided. Aspects have improved DC-based switching.
  • FIG. 6 is a schematic diagram of another DC-based handover process provided by the present application. As shown in FIG. 6, the handover method includes:
  • the target base station receives a handover request sent by the source base station;
  • the handover request is carried, and the source base station is based on a GTP tunnel port identifier of each bearer.
  • the source base station is the same as the GTP tunnel port identifier of each bearer based on the GTP tunnel port identifier of each bearer in the S502, and may refer to the description of the GTP tunnel port identifier of each source bearer based on each bearer in S502. No longer.
  • the handover request carries a handover type identifier, where the handover type identifier is used to indicate that the handover is a DC-based handover.
  • the switch type identifier is the same as the switch type identifier in S502. For reference, refer to the description of the identifier of the S502 squadron, and details are not described herein again.
  • the handover request may carry a UE-AMBR
  • the target base station acquires the source base station UE-AMBR according to the UE-AMBR carried in the handover request.
  • the handover request may further carry network slice information.
  • the network slice information is the same as the network slice information in S502, and is not described here. For details, refer to the description of the network slice information in S502.
  • the target base station sends a handover request feedback according to the handover request, where the handover request feedback carries the source base station UE-AMBR, and the source base station UE-AMBR is previously acquired by the target base station.
  • the target base station acquires according to the received UE-AMBR carried in the handover request sent by the source base station, and the received measurement report sent by the source base station and/or the resource usage status of the target base station.
  • the target base station establishes a connection with the UE according to the target base station UE-AMBR, and the source base station maintains a connection with the source base station according to the source base station UE-AMBR.
  • the target base station acquires the target base station UE-AMBR and the source base station UE-AMBR is 2
  • the relationship of 1: is that the target base station UE-AMBR is 60 (bps), and the source base station UE-AMBR is 30 (bps).
  • the target base station may also acquire, according to the current resource usage status, that the target base station UE-AMBR that the target base station can provide for the UE is 20 (bps), and the target base station determines that the source base station UE-AMBR is 20 (bps), and the target base station UE -AMBR is 70 (bps).
  • the independent scheduling of the target base station and the source base station is prevented from generating more than the UE-AMBR (for example, the UE-AMBR is 50 (bps), and if the target base station does not know, the target base station is allocated 40 for the UE. (bps), that is, the target base station UE-AMBR is 40 (bps), and the source base station allocates 20 (bps) to the UE, that is, the source base station UE-AMBR is 20 (bps), and the sum of the two is greater than 50 (bps). ). Coordinating the UE-AMBR by the source base station ensures smooth progress of the DC-based handover.
  • the handover request feedback is further carried, and the handover type identifier is used to indicate that the handover is a DC-based handover.
  • the target base station may determine whether to adopt DC-based handover and which DC handover is adopted according to the received UE capability. The determined result is sent to the source base station through the handover request feedback to inform the source base station whether the current handover uses DC-based handover or further based on which DC handover.
  • the target base station acquires whether the UE supports DC. If supported, the target base station can decide to perform DC-based handover. If it is not supported, DC-based handover cannot be performed. The flexibility of handover is increased by the target base station deciding whether to adopt DC-based handover.
  • the specific DC type is the same as the description of the DC in S502. For reference, refer to the description in S502, and details are not described herein again.
  • the handover request feedback is further carried, and the target base station is based on a GTP tunnel port identifier of each bearer.
  • the target base station is the same as the GTP tunnel port identifier of each bearer based on the GTP tunnel port identifier of each bearer in the S503, and is described with reference to S503, and details are not described herein again.
  • S703 may be included, where the source base station sends a handover message to the UE.
  • S703 is the same as S504.
  • S504 For details, refer to the description in S504, and details are not described herein again.
  • the target base station coordinates the UE capability between the source base station and the target base station, which indicates which handover is based, reduces the handover delay, and comprehensively improves the DC-based handover from various aspects.
  • the source base station, the target base station, and the UE may be divided into functional units.
  • each functional unit may be divided according to each function, or two or more functions may be integrated into one unit.
  • the above integrated units can be implemented in whole or in part by software, hardware, firmware or any combination thereof. It should be noted that the division of the unit in the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 7 is a schematic structural diagram of a device 100 provided by the present application, and the device 100 is applicable to implement a source base station, a target base station, or a UE of the present application. Referring to FIG. 7, the device 100 includes a receiving unit 101 and a transmitting unit 102.
  • the receiving unit 101 is configured to receive the handover request feedback sent by the target base station, and the sending unit 102 is configured to send the handover request to the target base station.
  • the receiving unit 101 is configured to receive the handover request sent by the source base station, and the sending unit 102 is configured to send the handover request feedback to the source base station.
  • the sending unit 102 is configured to send a measurement report to the source base station, and the receiving unit 101 is configured to receive the handover message sent by the source base station.
  • the receiving unit can be implemented through a communication interface, a receiver, a receiving circuit, and the like.
  • the transmitting unit can be implemented through a communication interface, a transmitter, a transmitting circuit, and the like. It should be understood that the functions of the receiving unit and the transmitting unit can also be integrated and implemented by the communication interface, the transceiver, and the transceiver circuit.
  • the communication interface is a collective name and may include one or more interfaces.
  • the hardware that implements the source base station, the target base station, or the UE is not limited to the foregoing structure, and may further include a processor, a memory, an antenna array, and a duplex. And the baseband processing part.
  • the processor may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array ( Field Programmable Gate Array (FPGA) or other programmable logic device, hardware component, or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the memory can be set in the processor or it can exist separately.
  • a duplexer is used to implement an antenna array for both transmitting signals and receiving signals.
  • the transmitter is used to convert between the RF signal and the baseband signal.
  • the transmitter can include a power amplifier, a digital-to-analog converter and a frequency converter.
  • the receiver can include a low noise amplifier, an analog to digital converter and a frequency converter. Among them, the receiver and the transmitter may also be collectively referred to as a transceiver.
  • the baseband processing section is used to implement processing of transmitted or received signals, such as layer mapping, precoding, modulation/demodulation, encoding/decoding, etc., and for physical control channels, physical data channels, physical broadcast channels, reference signals, etc. Perform separate processing.
  • the functions of the receiver and the transmitter can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • the processor can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • program code that implements processor, receiver, and transmitter functions is stored in a memory that implements the functions of the processor, receiver, and transmitter by executing code in memory.
  • a base station 1000 is provided.
  • the base station 1000 includes: a processor 1001, a memory 1004, a receiver 1003, a transmitter 1002, and the receiver 1003.
  • the device 1002 is configured to communicate with other network elements, the memory 1004 for storing programs executable by the processor 1001, the programs including instructions for implementing the methods, steps or processes described in the various embodiments above.
  • programs executable by the processor 1001 the programs including instructions for implementing the methods, steps or processes described in the various embodiments above.
  • the UE may be implemented by referring to FIG. 9.
  • the UE2000 includes: a processor 2001, a memory 2003, and a transceiver 2002.
  • the transceiver 2002 is configured to communicate with other network elements (through an antenna and Other network element communication) is used to store a program executable by the processor 2001, the program including instructions for implementing the methods, steps or processes described in the various embodiments above.
  • the program including instructions for implementing the methods, steps or processes described in the various embodiments above.
  • the source base station, the target base station, or the UE When the source base station, the target base station, or the UE is implemented by software, the concepts, explanations, detailed descriptions, and other steps related to the present application are referred to the descriptions of the foregoing methods. In this application, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the storage medium shown may be integrated into a device, module, or processor, or may be separately configured.
  • the present application further provides a communication system including the foregoing source base station, target base station, and UE. Or a communication system comprising a source base station and a target base station.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供一种基于DC的切换方法，包括：源基站向目标基站发送切换请求，所述切换请求携带目标基站用户设备聚合最大比特速率UE-AMBR和/或用户设备UE的网络切片信息；所述源基站接收所述目标基站发送的切换请求反馈。通过在源基站和目标基站之间协调用户设备能力，保证了在基于DC的切换时，不超过该用户设备能力的技术效果，其中，协调用户能力可以是源基站实施，也可以是目标基站实施。

Description

一种基于DC的切换方法及设备 技术领域
本申请涉及通信技术领域，尤其涉及一种基于DC的切换方法及设备。
背景技术
现有通信网络中，切换过程主要分为三个部分，切换准备阶段、切换执行阶段、切换完成阶段。在整个切换执行阶段，用户设备和源基站(source eNB/gNB)之间是没有连接的(即在这个阶段用户设备与源基站之间的连接断开了)，但此时还没有和目标基站(target eNB/gNB)建立连接，因此在这个阶段用户设备收不到到网络侧的任何数据，由此带来的数据的中断，或者切换时延。为了解决切换时延的问题，在下一代网络讨论中引入了基于双连接(Dual Connectivity，DC)切换的概念。简单来说指的是在切换过程中，用户设备在与目标基站建立连接的同时还与源基站之间保持连接，从而保证无中断的切换。
但是由于源基站和目标基站同时与UE通信，导致通信中会发生超过用户设备能力的问题。
发明内容
本申请提供一种基于DC的切换方法及设备，通过源基站和/或目标基站在源基站(或源小区)和目标基站(或目标小区)之间协调用户设备能力，防止了在基于DC的切换时，不超过用户设备能力的技术问题。用户能力可以包括用户设备聚合最大比特速率(user equipment aggregate maximum bit rate，UE-AMBR)和UE的网络切片信息。简单来说，协调UE-AMBR就是将UE-AMBR在源基站(或源小区)和目标基站(或目标小区)之间合理分配，通过协调UE-AMBR保证了DC切换时，源基站(或源小区)与目标基站(或目标小区)同时与UE通信时不超过UE-AMBR。协调UE的网络切片信息就是相互通知网络侧当前允许UE接入的至少一个网络切片或UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数，通过协调UE网络切片信息既使得目标基站(或目标小区)能够对UE进行接入验证，又使得目标基站(或目标小区)再下一次切换时为UE找到更合适的目标小区(或目标基站)。另外，在本申请中是否采用DC，采用何种DC进行切换可以是源基站决定的也可以是目标基站决定的，这样可以增加DC切换的灵活性。同时，切换过程中交互的信息还可以包括每个承载(each drb)的GPRS隧道协议(GPRS tunneling protocol，GTP)隧道端口标识(tunnel endpoint)，用于目标基站向源基站传输上行的分组数据汇聚层协议(Packet Data Convergence Protocol，PDCP)数据包，例如PDCP分组数据单元(packet data unit，PDU)或者用于源基站向目标基站传输下行的PDCP数据包，例如PDCP PUD；切换过程中交互的信息还可以包括定时信息或者触发信息，用于指示所述用户设备再预设时间或者预设触发条件达到后释放与源基站的连接，从而节省空口资源
第一方面，提供一种基于双连接DC的切换方法，所述切换方法包括：源基站向目标基站发送切换请求，所述切换请求携带目标基站用户设备聚合最大比特速率UE-AMBR和/或用户设备UE的网络切片信息；所述源基站接收所述目标基站发送的切换请求反馈。
在第一方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述源基站根据接收到的UE-AMBR获取的。
在第一方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个 数。
在第一方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
在第一方面的一种可能的实现方式中，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第一方面的一种可能的实现方式中，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第一方面的一种可能的实现方式中，在所述源基站接收所述目标基站发送的切换请求反馈之后，所述切换方法还包括，所述源基站向所述UE发送切换消息。
在第一方面的一种可能的实现方式中，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第二方面提供一种基于DC的切换方法，所述切换方法包括：目标基站接收源基站发送的切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；所述目标基站根据所述目标基站UE-AMBR和/或所述网络切片信息与UE建立通信。
在第二方面的一种可能的实现方式中，在所述目标基站接收源基站发送的切换请求之后，所述切换方法还包括，所述目标基站向所述源基站发送切换请求反馈，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第二方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
在第二方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
在第二方面的一种可能的实现方式中，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
第三方面，提供一种基于DC的切换方法，所述切换方法包括：用户设备向源基站发送测量报告；所述用户设备接收所述源基站发送的切换消息，其中所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第四方面，提供一种基于DC的切换方法，所述切换方法包括：目标基站接收源基站发送的切换请求；所述目标基站根据所述切换请求向源基站发送切换请求反馈，所述切换请求反馈携带源基站UE-AMBR，所述源基站UE-AMBR是所述源基站与所述UE通信时的AMBR。
在第四方面的一种可能的实现方式中，所述切换请求携带，切换类型标识和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第四方面的一种可能的实现方式中，所述切换请求反馈还携带，切换类型标识和所述目标基站基于每个承载的GTP隧道端口标识中的至少一种，其中，所述切换类型标识用 于指示切换是基于DC的切换。
在第四方面的一种可能的实现方式中，所述切换类型标识是所述目标基站根据用户设备能力确定的。
在第四方面的一种可能的实现方式中，所述源基站UE-AMBR是所述目标基站根据接收到的所述源基站或所述UE发送的UE-AMBR获取的。
第五方面，提供一种基于DC的切换方法，所述切换方法包括：源基站向目标基站发送切换请求，所述切换请求携带UE-AMBR；所述源基站接收目标基站发送的切换请求反馈，所述切换请求反馈携带源基站UE-AMBR；所述源基站根据所述源基站UE-AMBR与UE保持连接。
在五方面的一种可能的实现方式中，所述切换请求携带，下述信息中的一种或者多种，切换类型标识，UE的网络切片信息和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识；其中，所述切换类型标识用于指示切换是基于DC的切换。
在第五方面的一种可能的实现方式中，在所述源基站接收所述目标基站发送的切换请求反馈之后，所述切换方法还包括，所述源基站向所述UE发送切换消息。
在第五方面的一种可能的实现方式中，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第六方面，提供一种支持DC切换的基站，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，所述发送器向目标基站发送切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；所述接收器接收所述目标基站发送的切换请求反馈。
在第六方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述处理器根据所述接收器接收到的UE-AMBR获取的。
在第六方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
在第六方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
在第六方面的一种可能的实现方式中，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第六方面的一种可能的实现方式中，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第六方面的一种可能的实现方式中，在所述接收器接收所述目标基站发送的切换请求反馈之后，所述发送器还用于向所述UE发送切换消息。
在第六方面的一种可能的实现方式中，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第七方面，提供一种支持DC切换的基站，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，所述接收器源基站发送的切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；所述接收器和所述发送器根据所述目标基站UE-AMBR和/或所述网络切片信息与UE建立通信。
在第七方面的一种可能的实现方式中，所述发送器还用向所述源基站发送切换请求反馈，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第七方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
在第七方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
在第七方面的一种可能的实现方式中，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
第八方面，提供一种基于DC的UE，所述UE包括：收发器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，所述收发器向源基站发送测量报告；所述收发器接收所述源基站发送的切换消息，其中所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第九方面，提供一种基于DC切换的基站，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，所述接收器接收源基站发送的切换请求；所述发送器根据所述切换请求向源基站发送切换请求反馈，所述切换请求反馈携带源基站UE-AMBR，所述源基站UE-AMBR是所述源基站与所述UE通信时的AMBR。
在第九方面的一种可能的实现方式中，所述切换请求携带，切换类型标识和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第九方面的一种可能的实现方式中，所述切换请求反馈还携带，切换类型标识和所述目标基站基于每个承载的GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第九方面的一种可能的实现方式中，所述切换类型标识是所述处理器根据用户设备能力确定的。
在第九方面的一种可能的实现方式中，所述源基站UE-AMBR是所述处理器根据所述接收器接收到的所述源基站或所述UE发送的UE-AMBR获取的。
第十方面提供一种基于DC切换的基站，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，所述发送器向目标基站发送切换请求，所述切换请求携带UE-AMBR；所述接收器接收目标基站发送的切换请求反馈，所述切换请求反馈携带源基站UE-AMBR；所述发送器根据所述源基站UE-AMBR与UE保持连接。
在十方面的一种可能的实现方式中，所述切换请求携带，下述信息中的一种或者多种，切换类型标识，UE的网络切片信息和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识；其中，所述切换类型标识用于指示切换是基于DC的切换。
在第十方面的一种可能的实现方式中，所述发送器还用于向所述UE发送切换消息，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第十一方面，提供一种可读存储介质，包括指令，当所述指令被运行时，用于实现下述一方面或多方面所述的方法，第一方面，第二方面，第四方面和第五方面。
第十二方面，提供一种可读存储介质，包括指令，当所述指令被运行时，用于实现第三所述的方法。
第十三方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行下述一方面或多方面所述的方法，第一方面，第二方面，第四方面和第五方面。
第十四方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如第三方面所述的方法。
第十五方面，提供一种系统，包括上述第五方面和第六方面所述的基站。
第十六方面，提供一种系统，包括上述第八方面和第九方面所述的基站。
第十七方面，提供一种基于双连接DC的基站，所述基站法包括：
发送单元，用于向目标基站发送切换请求，所述切换请求携带目标基站用户设备聚合最大比特速率UE-AMBR和/或用户设备UE的网络切片信息；接收单元，用于接收所述目标基站发送的切换请求反馈。
在第十七方面的一种可能的实现方式中，所述基站还包括获取单元，所述获取单元用于根据接收到的UE-AMBR获取目标基站UE-AMBR。
在第十七方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
在第十七方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
在第十七方面的一种可能的实现方式中，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第十七方面的一种可能的实现方式中，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第十七方面的一种可能的实现方式中，所述发送单元还用于向所述UE发送切换消息，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第十八方面提供一种基于DC切换的基站，所述基站包括：接收单元，用于接收源基站发送的切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；建立通信单元，用于根据所述目标基站UE-AMBR和/或所述网络切片信息与UE建立通信。
在第十八方面的一种可能的实现方式中，所述基站还包括发送单元，用于向所述源基站发送切换请求反馈，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
在第十八方面的一种可能的实现方式中，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
在第十八方面的一种可能的实现方式中，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
第十九方面，提供一种基于DC切换的UE，所述UE包括：发送单元，用于向源基站发送测量报告；接收单元，用于接收所述源基站发送的切换消息，其中所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
第二十方面，提供一种基于DC切换的基站，所述基站包括：接收单元，用于接收源基站发送的切换请求；发送单元，用于向源基站发送切换请求反馈，所述切换请求反馈携带源基站UE-AMBR，所述源基站UE-AMBR是所述源基站与所述UE通信时的AMBR。
在第二十方面的一种可能的实现方式中，所述切换请求携带，切换类型标识和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第二十方面的一种可能的实现方式中，所述切换请求反馈还携带，切换类型标识和所述目标基站基于每个承载的GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
在第二十方面的一种可能的实现方式中，所述基站还包括确定单元，所述确定单元用于根据用户设备能力确定所述切换类型标识。
在第二十方面的一种可能的实现方式中，所述基站还包括获取单元，所述获取单元用于根据接收到的所述源基站或所述UE发送的UE-AMBR获取所述源基站UE-AMBR。
第二十一方面，提供一种基于DC的基站，所述基站包括：发送单元，用于发送切换请求，所述切换请求携带UE-AMBR；接收单元，用于接收目标基站发送的切换请求反馈，所述切换请求反馈携带源基站UE-AMBR；保持连接单元，用于根据所述源基站UE-AMBR与UE保持连接。
在二十一方面的一种可能的实现方式中，所述切换请求携带，下述信息中的一种或者多种，切换类型标识，UE的网络切片信息和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识；其中，所述切换类型标识用于指示切换是基于DC的切换。
在第二十一方面的一种可能的实现方式中，所述发送单元还用于向所述UE发送切换消息，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
附图说明
为了更清楚地说明本申请或现有技术中的技术方案，下面将对本申请中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些可能的实现方式，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获取其他的附图。
图1为本申请适用的一种通信网络的架构示意。
图2是现有技术中非基于DC的切换的流程示意图。
图3是现有技术中基于DC的切换的流程示意图。
图4是本申请提供的一种基于DC的切换流程示意图。
图5是本申请提供的基于DC切换的协议栈结构示意图。
图6是本申请提供的另一种基于DC的切换流程示意图。
图7是本申请提供的一种设备100的结构示意图。
图8是本申请提供的一种基站1000的结构示意图。
图9是本申请提供一种UE2000的结构示意图。
具体实施方式
在本申请中使用的术语是仅仅出于描述特定可能的实现方式的目的，而非旨在限制本申请。在本申请和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的或所有可能组合。进一步应当理解，本文中采用的术语“包括”规定了所述的特征、数据、信息、整体、步骤、操作、元件和/或部件的存在，而不排除一个或多个其他特征、数据、信息、整体、步骤、操作、元件、部件和/或它们的组的存在或附加。
下面首先，对本申请中的部分用语进行解释说明，以便本领域技术人员理解。
1)、源基站是进行基站切换之前与UE通信的基站，在LTE网络中可以称为source eNB，在5G即NR(new radio)可以称为source gNB。目标基站是成功进行基站切换之后与UE通信的基站，在LTE网络中可以称为target eNB，在5G即NR(new radio)可以称为target gNB。应当理解的前述只是对源基站和目标基站名称的示例，本申请对此不做限制。在本申请中，源基站的表述有时包含源基站(或源小区)，目标基站的表述有时包含目标基站或目标小区，本领有技术人员在不脱离本申请的情况下可以理解源基站和目标基站的具体含义。
3)、UE，是一种向用户提供语音和/或数据连通性的设备，可以包括各种具有无线通信功能的终端、手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备，移动台(Mobile station，MS)，传输点(transmission and receiver point，TRP或者transmission point，TP)等等。
4)、用户设备能力，用户设备能力(UE capability)，可以包括以下的任意一种或者多种：功率控制、如UE-AMBR、码资源、UE模式、计算、分组数据汇聚层协议(Packet Data Convergence Protocol，PDCP)能力、网络切片信息等等。这些能力是网络需要知道的，以便于管理该UE的无线资源。
5)、UE-AMBR，是用户能力的一种，也是一种QoS参数。用于表示一个UE所有非保证比特速率(non guaranteed bit rate，Non-GBR)业务(例如所有的流业务)所允许的最大聚合比特速率。目标基站UE-AMBR是，目标基站(或目标小区)与UE通信时，UE允许目标基站(或目标小区)与其通信的AMBR；源基站UE-AMBR是，源基站(或源小区)与UE通信时，UE允许源基站(或源小区)与其通信的AMBR。当UE与目标基站(或目标小区)建立连接的同时还与源基站(或源小区)保持连接时，其中该目标基站UE-AMBR与源基站UE-AMBR之和不能超过UE-AMBR，因此，当UE与目标基站(或目标小区)建立连接的同时还与源基站(或源小区)保持连接时，需要源基站或者目标基站为二者分配UE-AMBR。
6)、网络切片信息，可以包括允许的网络切片指示或者支持的最大网络切片个数。基站的网络切片信息可以是核心网、UE或者其他基站发给它的，本申请对此不做限制。
其中，支持的最大网络切片个数是UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数，指示了UE网络切片的一种能力。
允许的网络切片指示信息，指示了网络侧在源小区所属的注册区(registration area)或者跟踪区(tracking area)内允许UE接入的至少一个网络切片，或者针对某一个公众陆地移动网PLMN(pubic land mobile network，PLMN)网络侧在源小区所属的注册区域或者跟踪区内允许UE接入的至少一个网络切片。其中，所述源小区是进行切换之前源基站所属的与UE通信的小区。允许的网络切片指示可以采用以下参数中的至少一种来表示：
1、网络切片标识：
1.1、网络切片类型信息，网络切片类型信息可以用于指示增强的移动宽带业务(enhanced Mobile BroadBand，eMBB)，超可靠低时延通信(Ultra-Reliable Low  Latency Communications，URLLC)，海量机器类通信(massive Machine Type Communication，mMTC)等网络切片类型，可选地，该网络切片类型信息还可以指示端到端的网络切片类型，包含
Figure PCTCN2018087427-appb-000001
到CN的网络切片类型，也可以指网络((R)AN)侧网络切片类型，或者CN侧网络切片类型；
1.2、业务类型信息，与具体的业务相关。该业务类型信息可以指示视频业务，车联网业务，语音业务等业务特征或者具体业务的信息；
1.3、租户(Tenant)信息，用于指示创建或者租用该网络切片的客户信息，如客户为腾讯，国家电网等；
1.4、用户组信息，用于指示按照某种特征，例如按照用户的级别等将用户进行分组的分组信息；
1.5.切片组信息，用于指示按照某种特征，例如，可以将UE能够接入的所有网络切片作为一个切片组，或者也可以按照其他标准划分网络切片的分组；
1.6、网络切片实例信息，用于指示为该网络切片创建的实例标识以及特征信息，例如，可以为网络切片实例分配一个标识，用于指示该网络切片实例，也可以在网络切片实例标识的基础上映射一个新的标识，关联该网络切片实例，接收方可以根据该标识识别出该标识指示的具体网络切片实例；
1.7、专有核心网(Dedicated Core Network，DCN)标识，该标识用于唯一指示LTE系统或者eLTE系统中的专有核心网，例如物联网专有的核心网。可选的，该DCN标识可以与网络切片标识做映射，由DCN标识可以映射出网络切片标识，通过网络切片标识也可以映射出DCN标识。
应理解，若网络侧在源小区所属的注册区(registration area)或者跟踪区(tracking area)内允许UE接入多个网络切片，或者针对某一个公众陆地移动网PLMN(pubic land mobile network，PLMN)网络侧在源小区所属的注册区域或者跟踪区内允许UE接入多个网络切片，则允许的网络切片指示包含多个允许的(allowed)网络切片标识。
2、S-NSSAI，所述S-NSSAI至少包含切片类型/服务类型(Slice/Service type，SST)信息，可选的还可以包含切片区分信息(Slice Differentiator，SD)。所述SST信息用于指示网络切片的行为，例如网络切片的特征以及服务类型，所述SD信息是SST的补足信息，若SST指向多个网络切片实施，那么SD可以对应到唯一的一个网络切片实例。应理解，若网络侧在源小区所属的注册区(registration area)或者跟踪区(tracking area)内允许UE接入多个网络切片，或者针对某一个公众陆地移动网PLMN(pubic land mobile network，PLMN)网络侧在源小区所属的注册区域或者跟踪区内允许UE接入多个网络切片，则允许的网络切片指示包含多个允许的(allowed)S-NSSAI。
3、S-NSSAI组信息，用于指示按照某种特征分组，例如，可以将UE设备能够接入的某个共同的AMF的所有网络切片作为一个S-NSSAI组。
4、临时标识(Temporary ID)：该临时标识信息有AMF分配给已经在CN侧注册的UE，该Temporary ID可以唯一指向某一个AMF。
5、R-NSSAI((R)AN-NSSAI)：表示一组特定的S-NSSAI，即一组特定的S-NSSAI。应理解，若网络侧在源小区所属的注册区(registration area)或者跟踪区(tracking area)内允许UE接入多个网络切片，或者针对某一个公众陆地移动网PLMN(pubic land mobile network，PLMN)网络侧在源小区所属的注册区域或者跟踪区内允许UE接入多个网络切片，则允许的网络切片指示可以包含多个允许的(allowed)R-NSSAI的集合的标识。
6.允许的(allowed)NSSAI，NSSAI包含多个S-NSSAI。
应该理解，允许的网络切片指示的具体编码形式不限，可以承载在不同设备之间的接 口消息的不同字段分别代表不同的允许的网络切片指示，或者可以通过抽象后的索引值代替，不同的索引值分别对应不同的网络切片。当然，除了上述的标识外，网络切片信息还可以是其他的标识，在此不作限定。如果网络侧允许UE接入多个网络切片，则该允许的网络切片指示可以是允许的网络切片指示的列表形式，例如，允许的网络切片选择支撑信息列表(allowed Network Slice Selection Assistance Information list，allowed NSSAI list)，或者允许的单网络切片选择支持信息列表(allowed Single Network Slice Selection Assistance Information list，allowed S-NSSAI list)。
7)、交互，本申请中的交互是指交互双方彼此向对方传递信息的过程，这里传递的信息可以相同，也可以不同。例如，交互双方为源基站和目标基站，可以是源基站向目标基站请求信息，目标基站向源基站提供源基站请求的信息。当然，也可以源基站和目标基站彼此向对方请求信息，这里请求的信息可以相同，也可以不同。
8)、名词“网络”和“系统”经常交替使用，但本领域的技术人员可以理解其含义。信息(information)，信号(signal)，消息(message)，信道(channel)有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义可能是一致的。“的(of)”，“相应的(corresponding，relevant)”和“对应的(corresponding)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
下面将结合附图，对本申请中的技术方案进行描述。
图1为本申请适用的一种通信网络的架构示意图。图1以无线通信网络中5G网络场景为例进行说明，应当指出的是，本申请中的方案还可以应用于其他无线通信网络中，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。如图1所示，通信网络主要包括(无线)接入网((Radio)Access Network，(R)AN)和核心网(core network，CN)，CN的控制面板主要是移动性管理功能(Access and mobility management，AMF),其作用与LTE中的MME相似。值得注意的是，在5G中，演进的eNB(LTE基站)也可以接入5G的核心网，并且支持部分5G基站的功能。由于UE的移动性，正在进行会话的连接态UE会从源基站(或源小区)移动至目标基站(或目标小区)从而产生切换的过程，其中，源基站是切换之前与UE连接的基站，目标基站是切换之后与UE连接的基站。
图2是现有技术中非基于DC的切换的流程示意图，具体可以参考3GPP TS 36.300第十章的内容。如图2所示，现有切换主要分为三个部分，切换准备阶段(从S304到S306)、切换执行阶段(S307到S310)、切换完成阶段(S311到S314)，整个切换执行阶段，UE和源基站之间是没有连接的(即在这个阶段UE与源基站之间的连接已经断开了)。与非基于DC的切换相比，在现有基于DC的切换中，具体可以参考Ericsson在3GPP的提案，R2-1704434 0ms support during handover procedure with dual Tx_Rx如图3所示，其在切换流程的改进主要在于S406与S306不同，在S406中需要告知UE本次切换是基于DC的切换，以便于UE在切换执行的过程中继续保持与源基站之间的连接。现有方案只是简单的通知，并未考虑源基站和目标基站如何控制双连接
图4是本申请提供的一种基于DC的切换流程示意图，如图4所示，该切换方法包括：
S502，所述源基站向目标基站发送切换请求，所述切换请求携带目标基站用户设备聚合最大比特速率UE-AMBR和/或用户设备UE的网络切片信息；所述源基站接收所述目标基站发送的切换请求反馈。
可选的，切换请求中可以携带目标基站UE-AMBR(target gNB UE-AMBR)，该UE-AMBR是源基站根据接收到的UE-AMBR获取的，其中UE-AMBR可以是核心网发送、UE或者是其他基站发送给源基站的。具体的，目标基站UE-AMBR是所述源基站根据所述UE-AMBR，以及所述测量报告和/或所述源基站的资源使用状况等等获取的。目标基站根据目标基站UE-AMBR与UE建立连接，源基站根据源基站UE-AMBR与源基站保持连接。举例来说，假 设UE-AMBR为90(bps)，而根据该测量报告，目标基站当前的频谱效率是源基站的两倍，则源基站获取目标基站UE-AMBR与源基站UE-AMBR为2:1的关系，即目标基站UE-AMBR为60(bps)，而源基站UE-AMBR为30(bps)。再例如，源基站也可以根据当前的资源使用状况获取源基站能为UE提供的源基站UE-AMBR为20(bps)，则源基站确定源基站UE-AMBR为20(bps)，目标基站UE-AMBR为70(bps)。通过源基站的协调，防止了目标基站与源基站各自独立的调度产生超过UE-AMBR的情况(例如UE-AMBR为50(bps)，如果目标基站不知道的话，会造成目标基站为UE分配40(bps)，即目标基站UE-AMBR为40(bps)，而源基站为UE分配20(bps)，即源基站UE-AMBR为20(bps)，最终两者之和大于50(bps)。)通过源基站协调UE-AMBR保证了基于DC的切换的顺利进行。
可选的，切换请求中可以携带UE的网络切片信息。该网络切片信息是源基站从核心网或UE接收到，或者通过其他基站接收到的，并将其发送给目标基站的。在现有技术方案中，目标基站在切换时无法获得该信息。目标基站获得该网络切片信息后，有如下的技术效果：第一，可以在(R)AN侧对UE的权利进行验证。例如当UE进行无线资源控制(radio resource control，RRC)连接请求时，如果携带的网络切片标识不属于被当前网络允许的标识范围，则目标基站就可以知道该UE携带的网络切片标识是无效标识，从而可以拒绝该RRC连接请求，或者为UE选择一个默认的AMF。第二、目标基站获得该网络切片信息后在下一次切换时可以为UE找到一个更适合的目标小区或者目标基站。例如，UE要进行下一次切换时，其会话所属的网络切片为网络切片1，并且当前网络允许UE接入的网络切片为网络切片1、网络切片2、和网络切片3，那么当该UE需要切换时，目标基站(或目标小区)(这时上一次切换中的目标基站(或目标小区)变成即将进行的切换中的源基站(或源小区))为这个UE选择下一个目标小区(或目标基站)时就要考虑下一个目标小区(或目标基站)可以支持的网络切片，如果下一个目标小区(或目标基站)1支持网络切片1、网络切片2、和网络切片3，而下一个目标小区(或目标基站)2支持网络切片1、网络切片2和网络切片4，那么如果仅仅参考当前UE正在进行的会话所属的网路切片，下一个目标小区(或目标基站)1和目标小区(或目标基站)2都是可以的(或者相同的)，但是如果考虑到网络允许UE接入的网络切片，那么可能会优先选择下一个目标为目标小区(或目标基站)1，因为该目标小区(或目标基站)可以支持UE被允许的更多的网络切片，虽然当前UE没有网络切片3的会话，但是可能在切换以后会有这个会话，如果切换到下一个目标小区(或目标基站)2，则当UE想发起网络切片3的会话时就会不支持，而切换到下一个目标小区(或目标基站)1就不存在这种情况。第三，目标基站接收UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数，可以根据该信息为UE建立会话，如果UE希望建立超过这个个数的网络切片会话，则目标基站会拒绝。
可选的，切换请求还可以携带源基站基于每个承载的GTP隧道端口标识，用于目标基站向源基站传输上行的分组数据汇聚层协议(Packet Data Convergence Protocol，PDCP)分组数据单元(packet data unit，PDU)。之所以要携带GTP隧道端口标识，是因为UE与目标基站完成空口侧连接后的一段时间，核心网侧的连接还没有从源基站(或源小区)切换到目标基站，此阶段上行数据无法从目标基站传输至核心网，如果此时携带了GTP隧道端口标识，上行数据就可以通过源基站传输至核心网，从而减少了切换带来的上行数据传输时延。
可选的，切换请求还可以携带切换类型标识，该切换类型标识用于指示该切换是基于DC的切换。可选的，该切换类型标识还可以指示该切换是基于何种DC的切换。通过携带该切换类型标识使得目标基站知道在建立连接过程同其通信需要的协议栈。DC可以包括DC-1A，DC-1B，DC-3C，DC-3B等。图5是本申请提供的基于DC切换的协议栈结构示意图。如图5所示，不同DC的不同之处在于协议栈不同，即在目标基站(又可以称为第二基站，second gNB,SgNB)传输的数据流，会经过目标基站的哪些协议栈。在图5中MCG是Master cell group即主小区组，SCG是Second cell group即第二小区组。具体的，如图5A所示，在 DC-1A中，在目标基站中数据流经过的协议栈包括业务数据适配协议(Service Data Adaptation Protocol，SDAP)/PDCP/RLC/MAC。如图5B所示，在DC-3B中，在目标基站中数据流经过的协议栈包括RLC、MAC和部分PDCP。如图5C所示，在DC-3C中，在目标基站中数据流经过的协议栈包括RLC、MAC，即目标基站传输的数据时经过源基站(又可称为第一基站，主基站，MgNB)的SDAP和PDCP处理以后传输至目标基站，然后由目标基站的RLC、MAC处理后发出去的。
S503所述源基站接收所述目标基站发送的切换请求反馈。
可选的，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。该GTP隧道端口标识是目标基站针对每个接收的承载的GTP隧道端口标识，用于源基站向目标基站传输下行PDCP PDU。如果是基于DC-3C的切换，可以用来标识每个承载的数据，即标识这个数据时哪一个承载的。这样与切换请求中携带的GTP隧道端口标识类似，可以减少切换延时。
可选的，在所述源基站接收所述目标基站发送的切换请求反馈之后，本申请的切换方法还包括，S504所述源基站向所述用户设备发送切换消息，该切换消息可以是无线资源控制RRC重配置或者切换命令消息。
可选的，所述切换消息可以包括，切换类型标识，用于指示切换是否为基于DC的切换，以及可以选的，是基于何种DC的切换，与在切换请求中携带切换类型标识相类似，具体的可以参考对切换请求中携带切换类型标识的描述。UE收到该切换类型标识后，可以得知本次切换是否为基于DC的切换，以及基于何种DC的切换。
可选的，所述切换消息可以包括，定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接。通过该定时信息，UE获取释放源基站的连接的时间，避免一定要到无线链路失败的情况才释放。具体来说，该定时器可以在接受到源基站发送的切换信息以后启动，当定时器超时以后则终端释放与源基站之间的连接。或者，该定时器可以在终端与目标基站建立连接以后启动，当定时器超时以后则终端释放与源基站之间的连接。本方案不对定时器的启动时间做具体的限制。当无线链路条件较差时，再通过源基站通信已经没有什么意义，因为空口需要多次重传才能传输成功，浪费空口资源。
可选的，所述切换消息可以包括触发信息，触发信息用于指示所述用户设备释放与源基站连接的触发条件，其中触发条件可以包括触发的条件或或者触发事件。该触发信息是源基站或者是目标基站确定的。本实施例不做限定，如果是目标基站确定，则需要在切换请求反馈中携带，再由源基站通过切换消息发送给UE。举例来说，该触发信息指示当UE接收的源基站的信号低于一定的门限以后就释放与源基站之间的连接，或者该触发信息指示当UE接收的源基站与目标基站的信号差达到一定的门限以后就释放其与源基站之间的连接，或者当UE与源基站之间发生无线链路失败(radio link failure，RLF)的情况就释放其与源基站之间的连接，或者该触发信息指示终端与源基站之间的RLC重传次数达到一定的门限以后就释放其与源基站之间的连接，或者UE与源基站之间失同步的次数达到某个设定的门限的时候，UE就释放其与源基站之间的连接。及时释放连接，避免了空口资源的浪费。
应当理解的是，定时信息或者触发信息可以用于终止UE与源基站之间的上行数据传输，也可以终止UE与源基站之间的下行数据传输，还可以用于同时终止UE与源基站之间的上行和下行数据传输。
该定时信息或者触发信息，可以让UE知道什么时候释放与源基站之间的连接，避免无效的空口重传。如果UE不接收该定时信息或者触发信息，就不知道什么时候释放与源基站之间的连接，会带来无效的空口重传。一种情况下，UE向源基站传输上行数据的时候，切换过程可能已经完成，即源基站已经释放了UE的上下文，使得UE在释放UE的上下文(UE context)的上行传输都无效，而如果UE接收到上述信息，则可以避免类似的情况。例如源基站释放了UE的上下文，则不会向UE反馈上行数据的ACK，那么会带来RLC重传，而RLC的重传次数达到一定的门限以后，UE就不会进行重传了，而不是一直重传下去。除了上述 有益效果以外，如果UE当前处于异构网络系统中，目标小区(或目标基站)是微基站(small cell)而源小区为宏基站(macro gNB)，那么UE可能在短时间内就移出了当前的目标小区(或目标基站)而回到源小区，如果设置的定时信息没有超过这个时间，那么UE在回到源小区后可以继续得到服务，而不会出现数据中断。
通过以上切换流程，源基站在源基站和目标基站之间协调了UE能力，分享了网络切片信息，明示了是基于何种的切换，减少了切换延时，避免了空口资源的浪费，从多方面综合改进了基于DC的切换。
图6是本申请提供的另一种基于DC的切换流程示意图，如图6所示，该切换方法包括：
S701目标基站接收源基站发送的切换请求；
可选的，所述切换请求携带，所述源基站基于每个承载的GTP隧道端口标识。该源基站基于每个承载的GTP隧道端口标识与S502中的源基站基于每个承载的GTP隧道端口标识相同，可参考S502中对源基站基于每个承载的GTP隧道端口标识的描述，在此不再赘述。
可选的，所述切换请求携带切换类型标识，所述切换类型标识用于指示切换是基于DC的切换。该切换类型标识，与S502中的切换类型标识相同，可参考S502中队该标识的描述，在此不再赘述。
可选的，所述切换请求可以携带UE-AMBR，目标基站根据切换请求中携带的UE-AMBR获取源基站UE-AMBR
可选的，该切换请求可以还携带网络切片信息。该网络切片信息与S502中的网络切片信息相同，在此不再赘述，具体可参见S502中对网络切片信息的描述。
S702所述目标基站根据所述切换请求发送切换请求反馈，所述切换请求反馈携带所述源基站UE-AMBR，所述源基站UE-AMBR是所述目标基站预先获取的。所述目标基站根据接收到的源基站发送的切换请求中携带的UE-AMBR，以及接收到的源基站发送的测量报告和/或所述目标基站的资源使用状况获取。目标基站根据目标基站UE-AMBR与UE建立连接，源基站根据源基站UE-AMBR与源基站保持连接。举例来说，假设UE-AMBR为90(bps)，而根据该测量报告，目标基站当前的频谱效率是源基站的两倍，则目标基站获取目标基站UE-AMBR与源基站UE-AMBR为2:1的关系，即目标基站UE-AMBR为60(bps)，而源基站UE-AMBR为30(bps)。再例如，目标基站也可以根据当前的资源使用状况获取目标基站能为UE提供的目标基站UE-AMBR为20(bps)，则目标基站确定源基站UE-AMBR为20(bps)，目标基站UE-AMBR为70(bps)。通过目标站的协调，防止了目标基站与源基站各自独立的调度产生超过UE-AMBR的情况(例如UE-AMBR为50(bps)，如果目标基站不知道的话，会造成目标基站为UE分配40(bps)，即目标基站UE-AMBR为40(bps)，而源基站为UE分配20(bps)，即源基站UE-AMBR为20(bps)，最终两者之和大于50(bps)。)。通过源基站协调UE-AMBR保证了基于DC的切换的顺利进行。
可选的，所述切换请求反馈还携带，切换类型标识用于指示切换是基于DC的切换。可以理解的是，当S701的切换请求中不包括指示信息时，目标基站可以根据接收到的UE能力，确定是否采用基于DC的切换，以及采用何种DC切换。并将确定的结果通过切换请求反馈发送给源基站，以告知源基站本次切换采用基于DC的切换或者更进一步基于何种DC的切换。根据源基站发送的UE能力，目标基站获取UE是否支持DC，如果支持的话，那么目标基站就可以决定进行基于DC的切换，如果不支持的话，就不能进行基于DC的切换。通过目标基站决定是否采用基于DC的切换，增加了切换的灵活性。具体的DC类型与S502中对DC的介绍相同，可参考S502中的描述，在此不再赘述。
可选的，所述切换请求反馈还携带，所述目标基站基于每个承载的GTP隧道端口标识。该目标基站基于每个承载的GTP隧道端口标识与S503中的目标基站基于每个承载的GTP隧道端口标识相同，可参考S503对其描述，在此不再赘述。
可选的，在S702后可以包括S703，源基站向UE发送切换消息。S703与S504相同， 具体参见S504中的描述，在此不再赘述。
通过以上切换流程，目标基站在源基站和目标基站之间协调了UE能力，明示了是基于何种的切换，减少了切换延时，从多方面综合改进了基于DC的切换。
根据上述方法示例可以对源基站、目标基站以及UE进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个单元中。上述集成的单元既可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。需要说明的是，本申请中对单元的划分是示意性的，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。图7示出了本申请提供的设备100的结构示意图，该设备100可应用于实现本申请源基站、目标基站或UE。参阅图7所示，设备100包括接收单元101和发送单元102。当设备100用于实现源基站的功能时，接收单元101用于接收目标基站发送的切换请求反馈，发送单元102，用于向目标基站发送切换请求。当设备100用于实现目标基站的功能时，接收单元101用于接收源基站发送的切换请求，发送单元102用于向源基站发送切换请求反馈。当设备100用于实现UE的功能时，发送单元102用于向源基站发送测量报告，接收单元101用于接收所述源基站发送的切换消息。
当源基站和/目标基站管理采用硬件形式实现时，其所涉及的与本申请相关的概念，解释和详细说明、方法、流程及步骤等请参见前述实施例中关于这些内容的描述。本申请中，接收单元可以通过通信接口、接收器、接收电路等实现。发送单元可以通过通信接口、发送器、发送电路等实现。应当理解的是，接收单元和发送单元的功能还可以集成在一起，被通信接口、收发器、收发电路实现。其中，通信接口是统称，可以包括一个或多个接口。
可以理解的是，上述说明仅仅是硬件形式的简化示例，在实际应用中，实现源基站、目标基站或UE的硬件并不限于上述结构，例如还可以包括处理器，存储器，天线阵列，双工器以及基带处理部分。处理器可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、硬件部件或者其任意组合。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。存储器可以设置的处理器内，也可以单独存在。双工器用于实现天线阵列，既用于发送信号，又用于接收信号。发送器用于实现射频信号和基带信号之间的转换，通常发送器可以包括功率放大器，数模转换器和变频器，通常接收器可以包括低噪放，模数转换器和变频器。其中，接收器和发送器有时也可以统称为收发器。基带处理部分用于实现所发送或接收的信号的处理，比如层映射、预编码、调制/解调，编码/译码等，并且对于物理控制信道、物理数据信道、物理广播信道、参考信号等进行分别的处理。作为一种实现方式，接收器和发送器的功能可以考虑通过收发电路或者收发的专用芯片实现。处理器可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。作为另一种实现方式，将实现处理器、接收器和发送器功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器、接收器和发送器的功能。
例如，源基站或目标基站的实现方式可以参考图8，如图8所示，提供一种基站1000包括：处理器1001、存储器1004、接收器1003、发送器1002，所述接收器1003和发送器1002用于与其他网元通信，所述存储器1004用于存储能够被所述处理器1001执行的程序，所述程序包括用于实现上述各实施例所述方法、步骤或者流程的指令。具体方法、流程、步骤以及有益效果等请参见前述实施例中关于这些内容的描述，在此不再赘述。
例如，UE的实现方式可以参考图9，如图9所示，提供一种UE2000包括：处理器2001、存储器2003、收发器2002，该收发器2002用于与其他网元通信(可以通过天线与其他网元通信)，所述存储器2003用于存储能够被所述处理器2001执行的程序，所述程序包括用 于实现上述各实施例所述方法、步骤或者流程的指令。具体方法、流程、步骤以及有益效果等请参见前述实施例中关于这些内容的描述，在此不再赘述。
当源基站，目标基站，或UE通过软件实现时，其所涉及的与本申请相关的概念，解释和详细说明及其他步骤请参见前述方法中关于这些内容的描述。本申请中，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。所示存储介质可以集成在某设备、模块、处理器内，也可以分开设置。
根据本申请提供的方法，本申请还提供一种通信系统，其包括前述源基站、目标基站和UE。或者一种通信系统，包括源基站和目标基站。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (33)

  1. 一种基于双连接DC的切换方法，其特征在于，所述切换方法包括：
    源基站向目标基站发送切换请求，所述切换请求携带目标基站用户设备聚合最大比特速率UE-AMBR和/或用户设备UE的网络切片信息；
    所述源基站接收所述目标基站发送的切换请求反馈。
  2. 根据权要求1所述的切换方法，其特征在于，所述目标基站UE-AMBR是所述源基站根据接收到的UE-AMBR获取的。
  3. 根据权利要求1或2所述的切换方法，其特征在于，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；
    所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
  4. 根据权利要求3所述的切换方法，其特征在于，
    所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；
    所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
  5. 根据权利要求1至4任一项所述的切换方法，其特征在于，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
  6. 根据权利要求1-5任一项所述的切换方法，其特征在于，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
  7. 根据权利要求1-6任一项所述的切换方法，其特征在于，在所述源基站接收所述目标基站发送的切换请求反馈之后，所述切换方法还包括，
    所述源基站向所述UE发送切换消息；所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
  8. 一种基于DC的切换方法，其特征在于，所述切换方法包括：
    目标基站接收源基站发送的切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；
    所述目标基站根据所述目标基站UE-AMBR和/或所述网络切片信息与UE建立通信。
  9. 根据权利要求8所述的切换方法，其特征在于，在所述目标基站接收源基站发送的切换请求之后，所述切换方法还包括，
    所述目标基站向所述源基站发送切换请求反馈，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
  10. 一种基于DC的切换方法，其特征在于，所述切换方法包括：
    目标基站接收源基站发送的切换请求；
    所述目标基站根据所述切换请求向源基站发送切换请求反馈，所述切换请求反馈携带源基站UE-AMBR，所述源基站UE-AMBR是所述源基站与所述UE通信时的AMBR。
  11. 根据权利要求10所述的切换方法，其特征在于，所述切换请求携带，切换类型标识和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
  12. 根据权利要求10所述的切换方法，其特征在于，所述切换请求反馈还携带，切换类型标识和所述目标基站基于每个承载的GTP隧道端口标识中的至少一种，其中，所述切 换类型标识用于指示切换是基于DC的切换。
  13. 根据权利要求12所述的切换方法，其特征在于，所述切换类型标识是所述目标基站根据用户设备能力确定的。
  14. 根据权利要求11至13任一项所述的切换方法，其特征在于，所述源基站UE-AMBR是所述目标基站根据接收到的所述源基站或所述UE发送的UE-AMBR获取的。
  15. 一种基于DC的切换方法，其特征在于，所述切换方法包括：
    源基站向目标基站发送切换请求，所述切换请求携带UE-AMBR；
    所述源基站接收目标基站发送的切换请求反馈，所述切换请求反馈携带源基站UE-AMBR；
    所述源基站根据所述源基站UE-AMBR与UE保持连接。
  16. 一种支持DC切换的基站，其特征在于，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，
    所述发送器向目标基站发送切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；
    所述接收器接收所述目标基站发送的切换请求反馈。
  17. 根据权利要求16所述的基站，其特征在于，所述目标基站UE-AMBR是所述处理器根据所述接收器接收到的UE-AMBR获取的。
  18. 根据权利要求16或17所述的基站，其特征在于，所述目标基站UE-AMBR是所述目标基站与所述UE通信时的AMBR；
    所述网络切片信息包括允许的网络切片指示或支持的最大网络切片个数。
  19. 根据权利要求18所述的基站，其特征在于，所述允许的网络切片指示，用于指示网络侧在源小区所属的注册区或者跟踪区内允许UE接入的至少一个网络切片；
    所述支持的最大网络切片个数是所述UE支持的网络切片的最大个数或者所述UE可以同时接入的网络切片的最大个数。
  20. 根据权利要求16-19任一项所述的基站，其特征在于，所述切换请求还携切换类型标识和所述目标基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
  21. 根据权利要求16-20任一项所述的基站，其特征在于，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
  22. 根据权利要求16-21任一项所述的基站，其特征在于，所述发送器还用于向所述UE发送切换消息。
  23. 根据权利要求16-22任一项所述的基站，其特征在于，在所述接收器接收所述目标基站发送的切换请求反馈之后，
    所述发送器还用于向所述UE发送切换消息，所述切换消息携带以下信息中的一种或者多种，切换类型标识，定时信息和触发信息，其中，所述切换类型标识用于指示切换是基于DC的切换，所述定时信息，用于指示所述用户设备在预设时间达到后释放与源基站的连接，所述触发信息用于指示所述用户设备释放与所述源基站连接的触发条件。
  24. 一种支持DC切换的基站，其特征在于，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，
    所述接收器源基站发送的切换请求，所述切换请求携带目标基站UE-AMBR和/或UE的网络切片信息；
    所述接收器和所述发送器根据所述目标基站UE-AMBR和/或所述网络切片信息与UE建立通信。
  25. 根据权利要求24所述的基站，其特征在于，所述发送器还用向所述源基站发送切换请求反馈，所述切换请求反馈携带所述目标基站基于每个承载的GTP隧道端口标识。
  26. 一种基于DC切换的基站，其特征在于，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，
    所述接收器接收源基站发送的切换请求；
    所述发送器根据所述切换请求向源基站发送切换请求反馈，所述切换请求反馈携带源基站UE-AMBR，所述源基站UE-AMBR是所述源基站与所述UE通信时的AMBR。
  27. 根据权利要求26所述的基站，其特征在于，所述切换请求携带，切换类型标识和所述源基站基于每个承载的GPRS隧道协议GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
  28. 根据权利要求26所述的基站，其特征在于，所述切换请求反馈还携带，切换类型标识和所述目标基站基于每个承载的GTP隧道端口标识中的至少一种，其中，所述切换类型标识用于指示切换是基于DC的切换。
  29. 根据权利要求28所述的基站，其特征在于，所述切换类型标识是所述处理器根据用户设备能力确定的。
  30. 根据权利要求26-29所述的记者，其特征在于，所述源基站UE-AMBR是所述处理器根据所述接收器接收到的所述源基站或所述UE发送的UE-AMBR获取的。
  31. 一种基于DC切换的基站，其特征在于，所述基站包括：接收器、发送器、存储器、处理器，所述存储器存储有指令，当所述处理器执行所述指令时，使得，
    所述发送器向目标基站发送切换请求，所述切换请求携带UE-AMBR；
    所述接收器接收目标基站发送的切换请求反馈，所述切换请求反馈携带源基站UE-AMBR；
    所述发送器根据所述源基站UE-AMBR与UE保持连接。
  32. 一种可读存储介质，其特征在于，包括指令，当所述指令被运行时，用于实现权利要求1-7任一项所述的方法。
  33. 一种可读存储介质，其特征在于，包括指令，当所述指令被运行时，用于实现权利要求10-14任一项所述的方法。
PCT/CN2018/087427 2017-06-16 2018-05-18 一种基于dc的切换方法及设备 WO2018228126A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18818705.8A EP3634036B1 (en) 2017-06-16 2018-05-18 Dc-based handover method and device
US16/713,489 US11252615B2 (en) 2017-06-16 2019-12-13 Handover method that is based on DC and device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710459804.1 2017-06-16
CN201710459804.1A CN109151940B (zh) 2017-06-16 2017-06-16 一种基于dc的切换方法及设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/713,489 Continuation US11252615B2 (en) 2017-06-16 2019-12-13 Handover method that is based on DC and device

Publications (1)

Publication Number Publication Date
WO2018228126A1 true WO2018228126A1 (zh) 2018-12-20

Family

ID=64659290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/087427 WO2018228126A1 (zh) 2017-06-16 2018-05-18 一种基于dc的切换方法及设备

Country Status (4)

Country Link
US (1) US11252615B2 (zh)
EP (1) EP3634036B1 (zh)
CN (1) CN109151940B (zh)
WO (1) WO2018228126A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021022426A1 (en) 2019-08-02 2021-02-11 Nec Corporation Methods, devices and computer readable media for simultaneous connectivity based handover
EP4030820A4 (en) * 2019-09-26 2022-11-09 Huawei Technologies Co., Ltd. COMMUNICATION METHOD AND DEVICE
US11589410B2 (en) 2021-03-23 2023-02-21 Mediatek Singapore Pte. Ltd. Apparatuses and methods for coordinating transmission paths of a multi-radio dual connectivity (MR-DC) operation

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109792612B (zh) * 2017-04-18 2021-10-22 华为技术有限公司 终端监控信息的同步方法、设备及系统
US11438812B2 (en) * 2018-07-10 2022-09-06 Qualcomm Incorporated Performing a combination of handover techniques
WO2020147030A1 (zh) * 2019-01-16 2020-07-23 华为技术有限公司 一种小区注册方法及终端设备
WO2020150997A1 (en) * 2019-01-25 2020-07-30 Mediatek Singapore Pte. Ltd. Apparatus and methods to support dual-protocol for mobility enhancement
CN111903153B (zh) * 2019-02-03 2022-03-08 Oppo广东移动通信有限公司 业务处理方法、装置、芯片及计算机程序
CN113424585A (zh) * 2019-02-11 2021-09-21 诺基亚技术有限公司 利用网络切片的蜂窝部署中的增强型移动性
US20220124565A1 (en) * 2019-02-14 2022-04-21 Telefonaktiebolaget Lm Ericsson (Publ) A User Equipment and Methods Therein for Performing Handover
CN111726840B (zh) * 2019-03-21 2021-09-24 大唐移动通信设备有限公司 一种终端的双连接配置处理方法及装置
US11012913B2 (en) * 2019-04-08 2021-05-18 Qualcomm Incorporated User equipment capability-based transition
CN112789894A (zh) * 2019-06-28 2021-05-11 Oppo广东移动通信有限公司 一种用于切换的信息处理方法、网络设备
CN112188544A (zh) * 2019-07-04 2021-01-05 大唐移动通信设备有限公司 一种基站间用户设备网络切片信息处理的方法和装置
WO2021026818A1 (zh) * 2019-08-14 2021-02-18 华为技术有限公司 一种小区切换的方法、系统及设备
CN113498620B (zh) * 2019-08-16 2023-08-11 Oppo广东移动通信有限公司 用于小区切换的方法及设备
WO2021128157A1 (zh) * 2019-12-26 2021-07-01 华为技术有限公司 切换方法、设备及系统
EP4094490A4 (en) * 2020-01-20 2023-09-06 ZTE Corporation METHOD FOR SLICE-SPECIFIC INFORMATION
CN115088304A (zh) * 2020-03-19 2022-09-20 华为技术有限公司 小区切换方法和装置
US20230224769A1 (en) * 2020-04-30 2023-07-13 Beijing Xiaomi Mobile Software Co., Ltd. Method and apparatus for controlling data transmission rate communication device, and storage medium
WO2021229136A1 (en) * 2020-05-13 2021-11-18 Nokia Technologies Oy Prolonging voice service in an active state
CN114071361B (zh) * 2020-08-06 2022-09-09 大唐移动通信设备有限公司 一种基站内精确查找用户的方法、基站及装置
EP4210391A4 (en) * 2020-09-30 2023-11-01 Huawei Technologies Co., Ltd. CELL SELECTION METHOD AND APPARATUS AND PAGING METHOD AND APPARATUS
CN112492580B (zh) * 2020-11-25 2023-08-18 北京小米移动软件有限公司 信息处理方法及装置、通信设备及存储介质
WO2023234181A1 (ja) * 2022-06-02 2023-12-07 日本電気株式会社 無線アクセスネットワークノード、コアネットワークノード、無線端末、及びこれらの方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104509167A (zh) * 2012-08-02 2015-04-08 瑞典爱立信有限公司 通信网络中用于将无线终端连接到多个小区的方法
US20170026982A1 (en) * 2014-01-24 2017-01-26 Nokia Solutions And Networks Oy Method, Apparatus and Computer Program for Scheduling in Dual Connectivity Scenarios
CN106664597A (zh) * 2014-08-08 2017-05-10 日本电气株式会社 通信系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101635962B (zh) * 2008-07-24 2012-01-04 电信科学技术研究院 一种用户设备切换时获取承载状况的方法和mme
CN103052116B (zh) * 2011-10-14 2015-04-29 华为技术有限公司 传输速率控制方法、移动性管理实体和通讯系统
CN103874128B (zh) * 2012-12-18 2019-08-16 北京三星通信技术研究有限公司 配置ue的聚合最大速率的方法
CN110087272B (zh) * 2013-02-22 2021-10-08 三星电子株式会社 在多个e节点b和用户设备间提供同时连接的方法和系统
GB2512659A (en) * 2013-04-05 2014-10-08 Nec Corp Communication system
WO2015120571A1 (zh) * 2014-02-11 2015-08-20 华为技术有限公司 在载波聚合中控制数据传输速率的方法及装置
CN104955109B (zh) * 2014-03-28 2020-02-07 北京三星通信技术研究有限公司 配置UE的聚合最大速率的方法、协调non-GBR业务的聚合速率及基站
CN105472659B (zh) * 2014-08-07 2019-02-22 中国电信股份有限公司 节点间无线资源分配方法和系统
US10349329B2 (en) * 2015-07-28 2019-07-09 Qualcomm Incorporated Mechanisms for differentiated treatment of offloaded traffic
US10264506B2 (en) * 2017-05-13 2019-04-16 Qualcomm Incorporated Enable a network-trigger change of network slices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104509167A (zh) * 2012-08-02 2015-04-08 瑞典爱立信有限公司 通信网络中用于将无线终端连接到多个小区的方法
US20170026982A1 (en) * 2014-01-24 2017-01-26 Nokia Solutions And Networks Oy Method, Apparatus and Computer Program for Scheduling in Dual Connectivity Scenarios
CN106664597A (zh) * 2014-08-08 2017-05-10 日本电气株式会社 通信系统

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021022426A1 (en) 2019-08-02 2021-02-11 Nec Corporation Methods, devices and computer readable media for simultaneous connectivity based handover
EP4008159A4 (en) * 2019-08-02 2022-08-03 NEC Corporation CONNECTIVITY-BASED SIMULTANEOUS TRANSFER METHODS, DEVICES AND COMPUTER-READY MEDIA
EP4030820A4 (en) * 2019-09-26 2022-11-09 Huawei Technologies Co., Ltd. COMMUNICATION METHOD AND DEVICE
US11589410B2 (en) 2021-03-23 2023-02-21 Mediatek Singapore Pte. Ltd. Apparatuses and methods for coordinating transmission paths of a multi-radio dual connectivity (MR-DC) operation
TWI809452B (zh) * 2021-03-23 2023-07-21 新加坡商聯發科技（新加坡）私人有限公司 傳輸路徑協調方法及其使用者設備

Also Published As

Publication number Publication date
EP3634036B1 (en) 2023-10-11
EP3634036A1 (en) 2020-04-08
CN109151940A (zh) 2019-01-04
US11252615B2 (en) 2022-02-15
US20200120548A1 (en) 2020-04-16
CN109151940B (zh) 2021-12-03
EP3634036A4 (en) 2020-08-26

Similar Documents

Publication Publication Date Title
WO2018228126A1 (zh) 一种基于dc的切换方法及设备
US11917450B2 (en) Data transmission method and data transmission apparatus
CN110249597B (zh) 一种通信处理方法及装置
US11240699B2 (en) Insufficient resources in the UE during PDU session establishment procedure
RU2762681C2 (ru) Способ передачи данных, устройство сети доступа, терминал и система связи
CN109151915B (zh) 用于数据分组递送的方法、用户设备和基站
US20200022203A1 (en) Mobile communication system, control apparatus, base station, and user terminal supporting dual connectivity
EP3048845B1 (en) Device and method for data transmission
WO2018024128A1 (zh) 一种小区配置方法及装置
WO2019129117A1 (zh) 通信方法和装置
WO2019029643A1 (zh) 通信方法、基站、终端设备和系统
US20200178138A1 (en) Communication method, base station, terminal device, and system
WO2014198133A1 (zh) 一种数据无线承载drb的资源分配方法及装置
KR20160073227A (ko) 무선 통신 시스템에서 기지국과 단말 간 통신 방법을 결정하는 방법 및 장치
TWI775811B (zh) 通信方法、輔網絡節點和終端
CN110351890B (zh) 集中式单元-分布式单元架构下的通信方法、通信设备
WO2020164556A1 (zh) 一种实体建立的处理方法及装置
WO2014117335A1 (zh) 上行传输方法、基站和用户设备
TWI797414B (zh) 用於行動性增強之方法及其使用者設備
WO2018098762A1 (zh) 信息传输方法、基站和终端设备
CN117793958A (zh) 终端装置、基站装置以及方法
WO2015135125A1 (zh) 无线连接建立方法和装置
JP2018174597A (ja) ベアラ管理装置、方法及び通信システム
WO2024012296A1 (zh) 一种测量配置的方法、接入网设备和终端设备
US20160337099A1 (en) Coordinated communication method and system and apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18818705

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2018818705

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2018818705

Country of ref document: EP

Effective date: 20200116