WO2018033136A1 - Procédé de transfert intercellulaire, équipement utilisateur et dispositif de réseau - Google Patents

Procédé de transfert intercellulaire, équipement utilisateur et dispositif de réseau Download PDF

Info

Publication number
WO2018033136A1
WO2018033136A1 PCT/CN2017/098026 CN2017098026W WO2018033136A1 WO 2018033136 A1 WO2018033136 A1 WO 2018033136A1 CN 2017098026 W CN2017098026 W CN 2017098026W WO 2018033136 A1 WO2018033136 A1 WO 2018033136A1
Authority
WO
WIPO (PCT)
Prior art keywords
network device
measurement
reference signal
message
handover
Prior art date
Application number
PCT/CN2017/098026
Other languages
English (en)
Chinese (zh)
Inventor
耿婷婷
曾清海
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
Publication of WO2018033136A1 publication Critical patent/WO2018033136A1/fr

Links

Images

Classifications

    • 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
    • H04W36/005—Control or signalling for completing the hand-off involving radio access media independent information, e.g. MIH [Media independent Hand-off]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, a user equipment, and a network device for cell handover.
  • UE User Equipment
  • mobility management of the UE is required. For example, when the UE moves from the coverage of the source cell to the coverage of the target cell, it is necessary to complete the handover between the cells in time.
  • the design idea of mobility management is a network-oriented design idea (UE follows network). Taking the UE in the active state as an example, in order to implement the mobility management of the UE, each cell in the network sends a downlink reference signal for measurement by the UE. The UE reports the measurement result to the network side in the form of a measurement report. The network performs a handover decision based on the measurement report of the UE, and switches the UE to a cell with a good signal condition for data transmission.
  • UE network-oriented design idea
  • UCNC UE Centric No Cell
  • the embodiments of the present application provide a method, a user equipment, and a network device for cell handover, which can solve handover between a network-centric system and a user-centric system.
  • a method for cell handover including:
  • the first network device sends a time-frequency resource configuration of the uplink reference signal to the second network device, so that the second network device forwards the time-frequency resource configuration of the uplink reference signal to the UE;
  • the first network device in the embodiment of the present application can send the time-frequency resource configuration of the DCID and the uplink reference signal to the second network device, so that the second network device can be used to instruct the UE to send the uplink reference signal. Further, the first network device may instruct the UE to use the first network device as a serving cell by using the handover indication message, and perform data communication with the node on the first network side, so as to complete the handover of the second network device to the first network device. To ensure the continuity of the UE's business.
  • the method before the first network device sends the handover indication message to the second network device, the method further includes:
  • the first network device Sending, by the first network device, a measurement indication message to the first node, instructing the first node to measure an uplink reference signal sent by the UE, where the measurement indication message carries the DCID and/or the uplink reference signal Time-frequency resource configuration;
  • the first network device allocates the second node to the UE according to the first measurement report of the first node.
  • the first network device assigning the second node to the UE, including:
  • the first network device allocates the second node to the UE.
  • the determining, by the first network device, whether the measurement result carried by the first measurement report of the first node meets a handover threshold includes:
  • the first network device determines whether the measurement result carried by the first measurement report of the first node within a preset duration satisfies the handover threshold.
  • the first network device receives the preset duration and/or handover threshold from the second network device.
  • the method before the first network device sends the DCID to the second network device of the current serving cell of the UE, the method further includes:
  • the time-frequency resource configuration of the DCID and the uplink reference signal is included in a measurement response corresponding to the measurement request.
  • the first network device may send a measurement response to the second network device, the measurement response including a DCID and a time-frequency resource configuration of the uplink reference signal.
  • the handover indication message further includes:
  • the first network device is configured to transmit resource information of the UE, and/or the new ID that the first network device allocates to the UE.
  • the first network device Before the network device sends the handover indication message, the method further includes:
  • the first network device sends the TA value to the UE.
  • the sending, by the first network device, the TA value to the UE includes:
  • the first network device transmits the TA value to the second network device such that the second network device forwards the TA value to the UE.
  • a method for cell handover including:
  • the user equipment UE receives the first radio resource control RRC configuration message sent by the second network device of the current serving cell, where the first RRC configuration message includes a dedicated connection identifier DCID, and the DCID is used by the first network device to identify the UE;
  • the UE performs data transmission with the second node according to the handover command.
  • the UE in the embodiment of the present application can send the uplink reference information according to the time-frequency resource configuration of the second network device to send the DCID and the uplink reference signal, and further complete the handover of the second network device to the first network device based on the handover command, and ensure The continuity of the business.
  • the method before the receiving, by the UE, the first RRC configuration message sent by the second network device of the current serving cell, the method further includes:
  • the UE in the service range of the second network device performs heterogeneous system detection
  • the UE generates a second measurement report according to the result of the detection by the different system, where the second measurement report includes a cell ID of the first network where the first network device is located;
  • the UE sends the second measurement report to the second network device.
  • the performing, by the UE, the performing the system detection includes:
  • the UE periodically performs the heterogeneous system detection.
  • the triggering condition may be that the signal quality of the second network device detected by the UE is lower than a preset threshold.
  • the performing, by the UE, the performing the system detection includes:
  • the UE performs the heterogeneous system measurement according to the measurement control message.
  • the performing, by the UE, the performing the system detection includes:
  • the UE performs the inter-system detection, and detects at least one of the primary synchronization signal PSS, the secondary synchronization signal SSS, the downlink reference signal of the first network, and the system information SI sent by the first node in the first network. item.
  • the method before the sending, by the UE, the uplink reference signal according to the first RRC configuration message and the second RRC configuration message, the method further includes:
  • the UE receives a TA value sent by the first network device.
  • the TA value is included in the second RRC configuration message.
  • the method before the sending, by the UE, the uplink reference signal according to the first RRC configuration message and the second RRC configuration message, the method further includes:
  • the UE receives a TA value sent by the second network device.
  • the first RRC configuration message and the second RRC configuration message are the same message.
  • a method for cell handover including:
  • the second network device receives the time-frequency resource configuration of the dedicated connection identifier DCID and the uplink reference signal sent by the first network device, where the DCID is used by the first network device to identify the user equipment UE;
  • the second network device sends a first radio resource control RRC configuration message to the UE, where the first RRC configuration message includes the DCID;
  • the second network device sends a second RRC configuration message to the UE, where the second RRC configuration message includes a time-frequency resource configuration of an uplink reference signal, so that the UE is configured according to the first RRC configuration message and the The second RRC configuration message sends an uplink reference signal.
  • the UE that is in the service range of the second network device can be assisted by the second network device to complete the handover of the second network device to the first network device, and can include the continuity of the service of the UE.
  • the method further includes:
  • the second network device transmits the determined third TA value to the UE.
  • the method further includes:
  • the second network device sends the TA value to the UE.
  • the TA value is included in the second RRC configuration message.
  • the first RRC configuration message and the second RRC configuration message are the same message.
  • the method before the receiving, by the second network device, the TA value sent by the first network device, the method further includes:
  • the second network device sends a timing advance TA test command to the UE to instruct the UE to send a TA test message to the first network device.
  • the second network device receives the time-frequency resource configuration of the DCID and the uplink reference signal sent by the first network device, including:
  • the second network device receives a measurement response sent by the first network device, where the measurement response includes a time-frequency resource configuration of the DCID and an uplink reference signal.
  • the measurement request includes a handover threshold, or the measurement request includes a handover threshold and a preset duration.
  • the method before the second network device receives the second measurement report sent by the UE, the method further includes:
  • the second network device sends a measurement control message to the UE to instruct the UE to perform an inter-system measurement.
  • the method further includes:
  • the second network device receives the handover indication information that is sent by the first network device, where the handover indication message includes an identifier of the second node in the first network where the first network device is located;
  • the second network device sends a handover command to the UE according to the handover indication information, where the handover command includes an identifier of the second node, where the handover command is used to indicate the UE and the second node. Data transfer.
  • the handover indication message further includes:
  • the first network device is configured to transmit resource information of the UE, and/or the new ID that the first network device allocates to the UE.
  • a network device is provided, where the network device is a first network device, and includes:
  • a sending unit configured to send, to the second network device that is currently serving the cell of the user equipment UE, a dedicated connection identifier DCID, so that the second network device forwards the DCID to the UE, where the DCID is used by the The first network device identifies the UE;
  • the method is further configured to send, to the second network device, a handover indication message, where the handover indication message includes an identifier of a second node in a first network where the first network device is located, so that the UE and the second The node performs data transmission.
  • the network device is capable of implementing the method for cell handover described in the foregoing first aspect and various implementation manners thereof.
  • the receiving unit and the processing unit are further included.
  • the sending unit is further configured to send the measurement indication message to the first node, where the first node is configured to measure an uplink reference signal sent by the UE, where the measurement indication message carries the DCID and the uplink reference signal Time-frequency resource configuration;
  • the receiving unit is configured to receive a first measurement report sent by the first node, where the first measurement report carries a measurement result of the uplink reference signal sent by the UE;
  • the processing unit is configured to allocate the second node to the UE according to the first measurement report of the first node.
  • the processing unit is specifically configured to: Determining whether the measurement result carried by the first measurement report of the first node meets a handover threshold; if the measurement result carried by the first measurement report of the first node meets the handover threshold, the UE is Allocating the second node.
  • the processing unit is configured to: determine the measurement result carried by the first measurement report of the first node within a preset duration Whether the switching threshold is met.
  • the receiving unit is further configured to: receive the preset duration from the second network device.
  • the receiving unit is further configured to: receive the handover threshold from the second network device.
  • the method further includes: a receiving unit, configured to: receive a measurement request sent by the second network device, where the DCID and the uplink reference signal are The time-frequency resource configuration is included in the measurement response corresponding to the measurement request.
  • the handover indication message further includes: transmission resource information configured by the first network device for the UE, and/or the first A new ID assigned by the network device to the UE.
  • the receiving unit and the processing unit are further included.
  • the sending unit is further configured to send a TA test instruction to the second network device, so that the second network device instructs the UE to send a TA test message;
  • the receiving unit is configured to receive the TA test message sent by the UE;
  • the processing unit is configured to determine a TA value according to the TA test message
  • the sending unit is further configured to send the TA value to the UE.
  • the sending unit is specifically configured to: send the TA value to the second network device, so that the second network device The TA value is forwarded to the UE.
  • a network device comprising: a processor, a memory, and a transceiver.
  • the memory is for storing code
  • the processor is for executing code in the memory, and when the code is executed, the processor can implement the method for cell switching described in the foregoing first aspect and various implementation manners.
  • a computer readable storage medium in a sixth aspect, storing a program causing a network device to perform the first aspect described above, and any of its various implementations for The method of cell handover.
  • a system chip including an input interface, an output interface, at least one processor, and a memory, and the input interface, the output interface, the processor, and the memory are connected by a bus.
  • the processor is operative to execute code in the memory, the processor implementing the first aspect described above, and any of its various implementations being performed by a first network device when the code is executed method.
  • a user equipment including:
  • a receiving unit configured to receive a first radio resource control RRC configuration message sent by a second network device of the current serving cell, where the first RRC configuration message includes a dedicated connection identifier DCID, where the DCID is used by the first network device identifier UE;
  • the receiving unit is further configured to receive a second RRC configuration message sent by the second network device, where the second RRC configuration message includes a time-frequency resource configuration of an uplink reference signal;
  • a sending unit configured to send an uplink reference signal according to the first RRC configuration message and the second RRC configuration message
  • the receiving unit is further configured to receive a handover command sent by the second network device, where the handover command includes an identifier of a second node that is allocated by the first network device to the UE;
  • a processing unit configured to perform data transmission with the second node according to the switching command.
  • the UE of the eighth aspect is capable of implementing the method for cell handover described in the foregoing second aspect and various implementation manners thereof.
  • the processing unit is further configured to: perform an inter-system detection; and generate a second measurement report according to the result of the different system detection, where The second measurement report includes a cell ID of the first network where the first network device is located, and the sending unit is further configured to send the second measurement report to the second network device.
  • the processing unit performs the detection of the different system, specifically, when the trigger condition is met, performing the different system detection; or performing periodically The heterogeneous system detects.
  • the triggering condition is: the signal quality of the second network device detected by the UE is lower than a preset threshold.
  • the receiving unit is further configured to receive a measurement control message that is sent by the second network device, where the processing unit is specifically configured to The measurement control message performs the different system measurement.
  • the processing unit is configured to: perform an inter-system detection, and detect a primary synchronization signal sent by the first node in the first network. At least one of a PSS, a secondary synchronization signal SSS, a downlink reference signal of the first network, and system information SI.
  • the sending unit is further configured to send a timing advance TA test message to the first network device, where the receiving unit is further configured to receive The TA value sent by the first network device.
  • the TA value is included in the second RRC configuration message.
  • the receiving unit is further configured to receive a TA value sent by the second network device.
  • the first RRC configuration message and the second RRC configuration message are the same message.
  • a UE comprising: a processor, a memory, and a transceiver.
  • the memory is for storing code
  • the processor is for executing code in the memory, and when the code is executed, the processor can implement the method for cell switching described in the foregoing second aspect and various implementation manners.
  • a computer readable storage medium storing a program, the program causing a UE to perform the second aspect described above, and any one of its various implementations for a cell The method of switching.
  • a system chip in an eleventh aspect, includes an input interface, an output interface, and at least one a processor, a memory, the input interface, the output interface, the processor, and the memory are connected by a bus, the processor is configured to execute code in the memory, when the code is executed,
  • the processor implements the method of the second aspect described above, and any of its various implementations, performed by the UE.
  • a network device where the network device is a second network device, including:
  • a receiving unit configured to receive a time-frequency resource configuration of a dedicated connection identifier DCID and an uplink reference signal sent by the first network device, where the DCID is used by the first network device to identify the user equipment UE;
  • a sending unit configured to send a first radio resource control RRC configuration message to the UE, where the first RRC configuration message includes the DCID;
  • the sending unit is further configured to send a second RRC configuration message to the UE, where the second RRC configuration message includes a time-frequency resource configuration of an uplink reference signal, so that the UE is configured according to the first RRC configuration message and The second RRC configuration message sends an uplink reference signal.
  • the network device of the twelfth aspect is capable of implementing the method for cell handover described in the foregoing third aspect and various implementation manners thereof.
  • the method further includes: a processing unit, configured to perform, according to a first time advance between the second network device and the UE a quantity TA value and a second TA value between the second network device and the first network device, determining a third TA value between the UE and the first network device; the sending unit, further And for transmitting the determined third TA value to the UE.
  • the receiving unit is further configured to receive a TA value sent by the first network device, where the sending unit is further used to The TA value is sent to the UE.
  • the TA value is included in the second RRC configuration message.
  • the first RRC configuration message and the second RRC configuration message are the same message.
  • the sending unit is further configured to send a timing advance TA test instruction to the UE, to indicate that the UE is to the first
  • the network device sends a TA test message.
  • the receiving unit is further configured to receive a second measurement report that is sent by the UE, where the second measurement report includes the first network device a cell ID of the first network, where the sending unit is further configured to send a measurement request to the first network device, where the receiving unit is further configured to receive a measurement response sent by the first network device,
  • the measurement response includes a time-frequency resource configuration of the DCID and the uplink reference signal.
  • the measurement request includes a handover threshold, or the measurement request includes a handover threshold and a preset duration.
  • the sending unit is further configured to send a measurement control message to the UE to instruct the UE to perform an inter-system measurement.
  • the receiving unit is further configured to receive, by the first network device, handover indication information, where the handover indication message includes the An identifier of the second node in the first network where the network device is located; the sending unit is further configured to send a handover command to the UE according to the handover indication information, where the handover command includes the second node Identifying, the switching command is used to indicate the The UE performs data transmission with the second node.
  • the handover indication message further includes: transmission resource information configured by the first network device for the UE, and/or The new ID assigned by the first network device to the UE.
  • a network device comprising: a processor, a memory, and a transceiver.
  • the memory is for storing code
  • the processor is for executing code in the memory, and when the code is executed, the processor can implement the method for cell switching described in the foregoing third aspect and various implementation manners.
  • a computer readable storage medium in a fourteenth aspect, storing a program causing a network device to perform the third aspect described above, and any of the various implementations thereof The method of cell handover.
  • a system chip includes an input interface, an output interface, at least one processor, and a memory, and the input interface, the output interface, the processor, and the memory pass through the bus Connected, the processor is operative to execute code in the memory, when the code is executed, the processor implements the third aspect described above, and any of its various implementations are performed by a second network device Methods.
  • a communication system comprising a network device, the network device comprising the first network device according to any one of the foregoing fourth to seventh aspects, and/ Or the second network device according to any one of the twelfth to fifteenth aspects.
  • the communication system further includes a user equipment, where the user equipment is any one of the foregoing eighth to eleventh aspects UE.
  • the first network device may be an NR controller
  • the second network device may be a base station (such as an eNB) in the LTE.
  • the first network where the first network device is located may be an NR.
  • the first node may be a TP in the first TPG
  • the second node may be a TP in the second TPG.
  • FIG. 1 is a schematic diagram of a super cell according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application.
  • FIG. 4 is another schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application.
  • FIG. 5 is another schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application.
  • FIG. 6 is another schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application.
  • FIG. 7 is another schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a handover of a UE from NR to LTE according to an embodiment of the present application.
  • FIG. 9 is another schematic flowchart of a handover of a UE from NR to LTE in an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a method for cell reselection according to an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of cell handover in the embodiment of the present application.
  • FIG. 12 is another schematic flowchart of cell handover in the embodiment of the present application.
  • FIG. 13 is another schematic flowchart of cell handover in the embodiment of the present application.
  • FIG. 14 is a structural block diagram of a network device according to an embodiment of the present application.
  • FIG. 15 is another structural block diagram of a network device according to an embodiment of the present application.
  • FIG. 16 is a structural block diagram of a UE according to an embodiment of the present application.
  • FIG. 17 is another structural block diagram of a UE according to an embodiment of the present application.
  • FIG. 18 is a structural block diagram of a network device according to an embodiment of the present application.
  • FIG. 19 is another structural block diagram of a network device according to an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • the user equipment includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular"
  • the telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.
  • a new radio (NR) system which may also be called a Next Radio system or a next-generation network, may be a hyper cell.
  • a hyper cell may be used.
  • the hyper cell ID is configured, and the hyper cell may include multiple nodes of the same frequency and/or different frequency.
  • the node may be a transmission point (TP).
  • TP transmission point
  • the hyper cell may also be used.
  • the TP may include only one TP.
  • the hyper cell may include multiple cells.
  • only one cell may be included in the hyper cell. It can be understood that the ID of the TP (or cell) in the hyper cell can be consistent with the ID of the hyper cell, or can be configured separately.
  • the common information of the TP in the hyper cell may be configured to be consistent.
  • the content of the channel transmitted by the channel such as the synchronization channel, the downlink reference channel, and the broadcast channel is the same, and the UE moves in the hyper cell due to the hyper cell.
  • the public information of the TP is the same, and the UE has no perception of the change of the serving cell.
  • the UE does not need to measure the downlink reference signal sent by each cell in the hyper cell. Instead, the UE sends an uplink reference signal, and the network side measures the uplink reference signal of the UE, and selects one or more TPs for the UE based on the measurement result. Data transfer.
  • the task of measuring the uplink reference signal and the TP handover can be completed by the network side, and the UE is not aware of the TP transformation as much as possible, which is equivalent to introducing the "no cell” working mode, so that not only the working mode is introduced, but not only the "no cell” is introduced. It can ensure the continuity of services, and can reduce the overhead of air interface signaling. The UE does not need to undertake heavy measurement tasks, and the design complexity is also reduced accordingly.
  • the UE does not perform downlink measurement, but is based on the UE uplink reference signal to the UE and The link quality of the network is measured and evaluated. Therefore, in general, the NR system does not need to frequently transmit downlink reference signals, which not only reduces inter-cell interference, but also further improves network resource utilization.
  • the NR controller allocates a Dedicated Connection Identity (DCID) to the UE, and the super cell can identify the UE according to the DCID. That is, the NR controller can uniquely identify the UE based on the DCID.
  • the TP in the super cell may provide a data communication service for the UE based on the DCID; the TP in the super cell may also identify and measure the uplink reference signal sent by the UE based on the DCID.
  • the DCID may be simply referred to as a Dedicated Identity (DID), or may be referred to as a Dedicated User Identity (DUI), which may be a C-RNTI, a hyper cell ID, a TP ID, a cell ID, and a newly defined Any one of IDs and the like or a combination of any of them.
  • DID Dedicated Identity
  • DAI Dedicated User Identity
  • the UE may be provided with mobility management by a new radio controller (NR controller), which may be an independent network element on the access network side, or a logical network element, or a centralized network.
  • a new radio controller (NR controller)
  • the NR controller may be in the same entity as the TP, such as an access network device, and the TP may be a transmitting and receiving unit of the access network device; or the NR controller may be a TP, and the TP may be Or not the TP in the TP set of the data transmission service provided by the UE.
  • the NR controller can directly send signaling to the UE.
  • the specific type of the node is not limited in the embodiment of the present application.
  • it may be a normal base station (such as a NodeB or an eNB), may be a radio remote module, may be a pico base station, or may be a relay. ), which may be a distributed network unit, may be a TP, may be a DU and a TP, or any other wireless access device.
  • the node may have all or part of the layer 2 protocol stack function, or the node may have all or part of the layer 2 protocol and the physical layer protocol stack function.
  • the Layer 2 protocol may include at least one of a Packet Data Convergence Protocol (PDCP), a Radio Link Control (RLC), and a Medium Access Control (MAC). That is, the layer two protocol may be PDCP, or RLC, or MAC, or PDCP and RLC, or PDCP and MAC, or RLC and MAC, or PDCP and RLC and MAC.
  • the node may be a Transmission Reception Point (TRP) or a Transmission Point (TP) having all or part of the Layer 2 protocol, or the node may be a receiving point having all or part of the Layer 2 protocol and the physical layer protocol. Or transmission point.
  • TRP Transmission Reception Point
  • TP Transmission Point
  • the node is a TP as an example. It can be understood that if the node is a DU and a TP, the NR controller interacts with the DU, and then the DU further interacts with the TP, that is, the NR controller and the TP. The interaction needs to be done through the DU.
  • NR is a user-centric system
  • how to implement handover becomes a technical bottleneck when the UE moves between a network-centric system and a user-centric system.
  • LTE LTE
  • FIG. 2 it is a schematic diagram of a positional relationship between LTE and NR. It can be understood that the LTE is only schematic, and may be other network-centric systems, which are not limited herein.
  • the UE will switch between LTE and NR, and the UE expects to be able to provide continuous service.
  • the UE When the UE moves from LTE to NR, whether to camp on the NR system is determined by the NR system's measurement quality of the UE uplink SRS, and the UE may configure periodic SRS in LTE. In order to reduce unnecessary waste, it is preferable to The UE starts transmitting SRS only when the NR system covers; in addition, the SRS transmission configuration requires LTE and NR system interaction.
  • the UE When the UE moves from the NR to the LTE, the UE needs to be configured to enable the downlink measurement and reporting function in time; if the NR system does not support the measurement report on the UE side, it needs to interact with the LTE.
  • FIG. 3 is a schematic flowchart of a handover of a UE from LTE to NR according to an embodiment of the present application. It should be understood that FIG. 3 illustrates detailed communication steps or operations applied to switch from LTE to NR, but these steps or operations are merely examples, and other embodiments of the present application may perform other operations or various operations in FIG. Deformation. Moreover, the various steps in FIG. 3 may be performed in a different order than that presented in FIG. 3, and it is possible that not all operations in FIG. 3 are to be performed.
  • the UE 10, the eNB 20, the NR controller 30, and the TP 40 are shown in FIG. 3, where the TP 40 may be multiple.
  • the method shown in Figure 3 can include:
  • the UE 10 performs heterogeneous system detection.
  • the UE 10 is initially in the serving cell of the LTE, and the initial serving base station is the eNB 20.
  • the UE 10 may perform inter-system detection periodically, or the UE 10 may perform inter-system detection when the trigger condition is met.
  • the UE 10 may perform S102 according to the configuration of the eNB 20. Specifically, before S102, the UE 10 receives the measurement control message (or base station configuration message) sent by the eNB 20. And in S102, the UE 10 performs the heterogeneous system measurement according to the measurement control message (or the base station configuration message).
  • the UE 20 may periodically perform an inter-system measurement.
  • the UE 10 may receive a measurement control message sent by the eNB 20, the measurement control message instructing the UE 20 to perform the inter-system measurement periodically; further, the UE 10 may perform the hetero-system measurement according to the measurement control message.
  • the measurement control message can include a cycle size or the like.
  • this embodiment can be applied to the scenes shown in (a) of FIG. 2 and (b) of FIG. 2.
  • the UE 20 may perform an inter-system measurement when the trigger condition is met.
  • the UE 10 may receive a measurement control message sent by the eNB 20, where the measurement control message indicates that the UE 20 performs a trigger condition for the inter-system measurement; further, the UE 10 may perform the hetero-system measurement according to the measurement control message.
  • the triggering condition may be that the signal quality of the eNB 20 detected by the UE 10 is lower than a preset threshold.
  • the measurement control message can include the size of the threshold and the like. For example, this embodiment can be applied to the scenes shown in (b) of FIG. 2 and (c) of FIG. 2.
  • the eNB 20 may send the measurement control message in the form of broadcast or unicast.
  • the eNB 20 may send a measurement control message to one or more UEs located at the edge of the eNB 20 service range based on the location of the UE.
  • the UE 10 performing the inter-system measurement means that the UE 10 detects the NR information and the like.
  • the UE 10 detects the NR according to the configuration, and finds a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), an NR downlink reference signal, and System Information (SI) of the NR TP transmission. At least one of the others, and reading the NR information based on the signals found.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • SI System Information
  • the NR information includes an NR cell ID.
  • the NR cell ID may be the aforementioned hyper cell ID, TP ID, or other identifiers or physical cell identifiers (Physical) for uniquely identifying the NR cell. Cell ID) and the like, this application is not limited thereto.
  • the NR cell ID may also be referred to as a global NR cell ID.
  • the NR information may further include a bandwidth and/or a frequency band of the NR system and the like.
  • the UE 10 sends a second measurement report to the eNB 20.
  • the UE 10 can generate a second measurement report according to the result of the different system measurement. And then in S104, the second measurement report is sent to the eNB 20.
  • the second measurement report may include NR information, and further, the second measurement report may further The signal quality of the current eNB 20 detected by the UE 10 is included.
  • the signal quality of the current eNB 20 is the signal quality of the current serving cell, or may be referred to as the signal quality of the current LTE cell.
  • the second measurement report includes the NR cell ID.
  • the second measurement report may further include a bandwidth and/or a frequency band of the NR system; optionally, the second measurement report may further include a signal quality of the current serving cell (ie, a cell of the LTE); optionally, the second The measurement report may also include the signal quality of the NR cell.
  • a new heterogeneous system measurement report trigger mechanism or a different system discovery mechanism is introduced, that is, only the detection of the existence of the heterogeneous system triggers the heterogeneous system measurement report. It is not necessary to trigger the heterogeneous measurement report to trigger the heterogeneous system measurement report, as in the legacy mechanism, where the quality of the different system must meet the threshold.
  • the trigger mechanism of the detection of the different system may be similar to legacy.
  • the UE detects that the current LTE quality is lower than a certain threshold, the UE detects the NR, or the LTE configures the UE to periodically detect the NR, or the LTE according to the LTE.
  • the location information of the UE configures the UE to start detecting NR and the like.
  • the eNB 20 sends a measurement request to the NR controller 30.
  • the eNB 20 When the eNB 20 receives the second measurement report of the UE 10, it can learn that the UE 10 has detected the adjacent NR cell, and sends a measurement request to the NR controller 30.
  • the NR controller 30 is configured to transmit an uplink reference signal or the like to the UE 10.
  • the measurement request may also be referred to as a measurement configuration request or a measurement configuration request message.
  • the measurement request may further include location information of the UE 10.
  • the measurement request may further include a handover threshold, or the measurement request may further include a handover threshold and a preset duration.
  • a handover threshold or the measurement request may further include a handover threshold and a preset duration.
  • the NR controller 30 transmits a measurement response to the eNB 20.
  • the measurement response can include a DCID.
  • the DCID is assigned by the NR controller 30 to the UE 10 for the NR controller 30 to uniquely identify the UE 10.
  • the measurement response may further include a time-frequency resource configuration of the uplink reference signal.
  • the UE 10 can then send an uplink reference signal according to the time-frequency resource configuration.
  • the measurement response may also be referred to as a measurement configuration response or a measurement configuration response message.
  • the NR controller 30 may perform the NR configuration according to the measurement request, and then send the DCID (or the time-frequency resource configuration of the DCID and the uplink reference signal) to the eNB 20 by using the measurement response in the form of NR RRC.
  • the node is a TP. If the node is a DU and a TP, the interaction between the NR controller and the TP in the embodiment of the present application may be that the NR controller 30 interacts through the DU and the TP, that is, the NR controller and the DU directly interact, and then the DU and the TP interact. It can be understood that when the TPG includes multiple TPs, the TPs in the TPG may belong to the same or different DUs.
  • the NR controller 30 sends measurement indication information to the first transmission point group (TPG) to indicate that the TP in the first TPG measures the uplink reference signal sent by the UE.
  • TPG transmission point group
  • the first TPG includes one or more TPs.
  • the measurement indication information may include a time-frequency resource configuration of the DCID and the uplink reference signal.
  • the measurement indication information may further include a measurement threshold.
  • the first TPG may be a collection of all outermost TPs of the hyper cell.
  • the first TPG may be a set of the outermost TP of the hyper cell where the UE is located. That is, in S110, the NR controller 30 may determine the first TPG according to the location information of the UE, and then transmit the measurement indication information to the first TPG.
  • the measurement indication information may further include at least one of the following measurement configuration parameters: a carried measurement identifier, a measurement event name, a measurement interval, a measurement report reporting mode, a measurement reporting condition, and a measurement parameter.
  • a set of measurement configuration parameters may be configured for each DCID (or each UE), or a set of measurement configuration parameters may be configured for all DCIDs (or all UEs) in the super cell.
  • the measurement configuration parameter may include at least one of a reception quality of the uplink reference signal, a received power of the uplink reference signal, a signal to noise ratio, a signal to interference and noise ratio, a path loss, and the like.
  • the measurement configuration parameter may also include at least one of the thresholds of the above various parameters.
  • the measurement report reporting mode may include at least one of an event-triggered reporting mode, a periodic reporting mode, an event-triggered reporting, and a periodic reporting mode.
  • the event-triggered reporting mode may be: when the TP measured uplink reference signal meets the threshold in the measurement configuration parameter, the TP sends a measurement report to the NR controller.
  • the periodic reporting mode may refer to the TP periodically sending a measurement report to the NR controller.
  • the TP After the NR controller configures the measurement configuration parameter of the uplink reference signal for the TP, the TP can measure the uplink reference signal sent by the UE according to the measurement configuration parameter, and report the measurement result to the NR controller according to the measurement reporting mode.
  • the measurement indication information may indicate that the TP performs the intra-frequency measurement, and may also instruct the TP to perform the inter-frequency measurement.
  • the NR controller may send the measurement indication information of the intra-frequency measurement to the TP, or may send the measurement indication information of the inter-frequency measurement to the TP.
  • the frequency of the TP is F1
  • the frequency at which the UE sends the uplink reference signal is F2
  • the NR controller can instruct the TP to perform the inter-frequency measurement, that is, the TP is configured to measure the uplink reference signal sent by the UE on the F2.
  • the NR controller may also instruct the UE to send an uplink reference signal at the working frequency of the TP, that is, the F1 frequency band, and then instruct the TP to perform the same frequency measurement. In this way, the TP only needs to measure the uplink reference signal in its own working frequency band. It should be understood that the above two measurement methods may be used alone or in combination, and the embodiment of the present application does not specifically limit this.
  • the eNB 20 sends a first RRC configuration message to the UE 10.
  • the first RRC configuration message includes a DCID. If the measurement response includes a time-frequency resource configuration of the DCID and the uplink reference signal, the first RRC configuration message includes a DCDR and a time-frequency resource configuration of the uplink reference signal.
  • the eNB 20 may send the first RRC configuration message to the UE 10 in a tunnel manner.
  • the eNB 20 may configure the UE to send the time-frequency resource of the uplink reference signal, and send the time-frequency resource configuration of the uplink reference signal to NR controller 30 and UE 10.
  • the eNB 20 determines the time-frequency resource configuration of the uplink reference signal, and transmits the time-frequency resource configuration of the uplink reference signal to the NR controller 30 by measuring the configuration indication information. After that, the NR controller 30 performs S110 again. And in S112, the first RRC configuration message includes a time-frequency resource configuration of the DCID and the uplink reference signal.
  • the first RRC configuration message in S112 includes a DCID.
  • the eNB 20 determines the time-frequency resource configuration of the uplink reference signal, and transmits the time-frequency resource configuration of the uplink reference signal to the NR controller 30 by measuring the configuration indication information. After that, the NR controller 30 performs S110 again. And after S112, the eNB 20 may send a second RRC configuration message to the UE 10, where the second RRC configuration message includes a time-frequency resource configuration of the uplink reference signal.
  • the eNB 20 can send the time-frequency resource configuration of the DCID and the uplink reference signal to the UE 10 in one RRC configuration message; or the eNB 20 can respectively set the DCID and the uplink reference signal in two different RRC configuration messages.
  • the frequency resource configuration is sent to the UE 10.
  • the UE 10 sends an uplink reference signal.
  • the name, the type, and the format of the signal for the network measurement sent by the UE are not specifically limited.
  • the UE sends the uplink reference signal as an example, but the embodiment of the present application is not limited thereto, for example, It may be a newly introduced tracking signal for tracking the location of the UE, or may use a Sounding Reference Signal (SRS).
  • SRS Sounding Reference Signal
  • the UE sends an uplink reference signal according to the DCID and the time-frequency resource configuration of the uplink reference signal.
  • the UE 10 may send the uplink reference signal by using the time-frequency resource according to the time-frequency resource configuration of the uplink reference signal.
  • the uplink reference signal may be an SRS. In one embodiment, the uplink reference signal can be transmitted periodically.
  • the TP in the first TPG can measure the uplink reference signal sent by the UE 10 according to the measurement indication in S110.
  • the NR controller 30 receives the first measurement report sent by the TP 40 in the first TPG.
  • the first measurement report may include a measurement result of the uplink reference signal, and the specific measurement result type corresponds to the measurement configuration parameter in S110.
  • the measurement result is signal strength information as an example.
  • the first measurement report carries the signal strength information of the uplink reference signal sent by the UE 10 detected by the TP 40.
  • the TP in the first TPG can determine the signal strength information of the uplink reference signal by detecting an uplink reference signal sent by the UE.
  • the signal strength information in different first measurement reports may be unequal.
  • the first measurement report sent by the TP1 includes the signal strength information of the uplink reference signal detected by the TP1
  • the first measurement report sent by the TP2 includes the signal strength information of the uplink reference signal detected by the TP2.
  • each TP in the first TPG sends a first measurement report.
  • each TP in the first TPG capable of detecting the uplink reference signal sends the first measurement report.
  • a portion of the TPs in the first TPG sends a first measurement report. For example, if the signal strength information of the uplink reference signal detected by the first TP in the first TPG is greater than or equal to the measurement threshold, the first TP sends the first measurement report. For example, if the signal strength information of the uplink reference signal detected by the first TP in the first TPG is less than the measurement threshold, the first TP does not send the first measurement report.
  • the measurement threshold may be predefined in each TP; or the measurement threshold may be configured by the NR controller 30, for example, the measurement indication message in S110 may carry the measurement threshold.
  • the NR controller 30 allocates a second TPG to the UE 10.
  • the NR controller 30 may determine whether the signal strength information carried by the first measurement report of the TP in the first TPG satisfies a handover threshold; if the first measurement report of the TP in the first TPG is carried The signal strength information satisfies the handover threshold, and the NR controller 30 allocates the second TPG to the UE 10, and the second TPG includes one or more TPs.
  • the switching threshold is greater than the measurement threshold described above.
  • the meeting the switching threshold may refer to Greater than or equal to the switching threshold.
  • the TP (such as the first TP) is added to the second TPG. in. If the signal strength information carried by the first measurement report of a TP (eg, the second TP) in the first TPG is less than the handover threshold, the TP (eg, the second TP) is not added to the second TPG.
  • the NR controller 30 can select at least one TP as the second TPG from the first TPG according to the handover threshold.
  • the NR controller 30 may select from among the TPs other than the first TPG. That is, the TPs in the second TPG may all belong to the first TPG, or the TP part in the second TPG belongs to the first TPG, and the other part does not belong to the first TPG, or the TPs in the second TPG do not belong to the first TPG.
  • the switching threshold may be pre-configured on the NR controller 30.
  • the handover threshold may be received by the NR controller 30 from the base station eNB 20 of the LTE, for example, the measurement request in S106 includes the handover threshold.
  • the NR controller 30 may determine whether the signal strength information carried by the first measurement report of the TP in the first TPG within the preset time period satisfies a handover threshold; if within a preset duration, The signal strength information carried by all the first measurement reports of the TP in the first TPG satisfies the handover threshold, and the NR controller 30 allocates the second TPG to the UE 10.
  • the switching threshold is greater than the measurement threshold described above.
  • the NR controller 30 can select at least one TP as the second TPG from the first TPG according to the preset duration and the handover threshold.
  • the preset duration can be implemented by using a timer.
  • the NR controller 30 can determine whether the signal strength information meets the switching threshold during the running time of the timer.
  • the NR controller 30 may also select from other TPs other than the first TPG as part of the TP in the second TPG. That is to say, all or part of the TPs in the second TPG belong to the first TPG, or all of the TPs in the second TPG do not belong to the first TPG.
  • the preset duration may be pre-configured on the NR controller 30. Alternatively, the preset duration may be received by the NR controller 30 from the base station eNB 20 of the LTE. For example, the measurement request in S106 includes the preset duration.
  • the eNB 20 can configure the timer for the NR controller 30 before S118.
  • the measurement request includes indication information of a timer, where the indication information includes a duration of the timer (ie, a preset duration).
  • the NR controller 30 sends a handover indication message to the eNB 20.
  • the handover indication message may include indication information of the second TPG to enable data transmission between the UE 10 and the TP in the second TPG.
  • the handover indication message may further include: transmission resource information configured by the NR controller 30 for the UE 10, and/or a new ID allocated by the NR controller 30 to the UE 10.
  • the handover indication message may further include a configuration of layer one (L1) and/or layer two (L2) and/or layer three (L3), etc., which is not limited in this application.
  • the eNB 20 can determine whether to permit the UE 10 to perform handover according to the handover indication message. That is, the eNB 20 decides whether or not to use the NR as the serving cell of the UE 10.
  • the eNB 20 may directly agree to use the NR as the service of the UE 10. Community.
  • the eNB 20 may perform a certain determination and then decide whether to agree to use the NR as the serving cell of the UE 10. For example, if the signal quality between the eNB 20 and the UE 10 is greater than or equal to a certain quality threshold, and the current load of the eNB 20 is less than a certain load threshold, the eNB 20 may decide to reject the NR as the serving cell of the UE 10.
  • the eNB 20 may decide to use the NR as the serving cell of the UE 10.
  • the eNB 20 sends a handover command to the UE 10.
  • the eNB 20 may perform S122 if it decides to use the NR as the serving cell of the UE 10.
  • the handover command may include indication information of the second TPG allocated by the NR controller 30 for the UE 10.
  • the UE 10 performs data transmission with the TP in the second TPG.
  • the UE 10 may use the hyper cell as the serving cell or the hyper cell as one of the serving cells according to the handover command, and communicate with the TP in the second TPG.
  • the handover indication message in S120 includes: the transmission resource information configured by the NR controller 30 for the UE 10, and correspondingly, the handover command in the S122 also includes the transmission resource information, then in S124, the UE 10 according to the transmission resource information, Data transmission with the TP in the second TPG.
  • the handover indication message in S120 includes: a new ID (such as new DCID) allocated by the NR controller 30 to the UE 10, correspondingly, the handover command in S122 also includes the new ID, then in S124, the UE 10 uses The new ID is transmitted with the TP in the second TPG.
  • a new ID such as new DCID
  • the UE 10 reuses the previous NR configuration and performs data transmission with the TP in the second TPG.
  • the UE 10 may send an SRS to the TP in the second TPG according to the NR configuration, and establish a data transmission with the TP in the second TPG.
  • the embodiment of the present application can implement switching between the network-centric LTE system and the user-centered NR system, ensuring continuity of services, improving handover efficiency, and thus ensuring transmission quality.
  • uplink synchronization of the UE 10 and the NR controller 30 may be completed before the UE 10 transmits the uplink reference signal in S114.
  • the method may include:
  • the eNB 20 determines the TA between the UE 10 and the NR controller 30.
  • the eNB 20 may determine the third TA between the UE 10 and the NR controller 30 according to the first TA value between the eNB 20 and the UE 10 and the second TA value between the eNB 20 and the NR controller 30. value.
  • the eNB 20 may then transmit the determined third TA value to the UE 10.
  • the first RRC configuration message in S112 includes a DCID, a time-frequency resource configuration of an uplink reference signal, and a third TA.
  • the method further includes: the eNB 20 sends a second RRC configuration message to the UE 10.
  • the first RRC configuration message includes a DCID
  • the second RRC configuration message includes a time-frequency resource configuration of the uplink reference signal and a third TA.
  • the first RRC configuration message includes a DCID and a time-frequency resource configuration of the uplink reference signal
  • the second RRC configuration message includes a third TA.
  • S112 may be performed before or after S111, which is not limited in this application.
  • the method further includes: the eNB 20 sends a second RRC configuration message to the UE 10.
  • the first An RRC configuration message includes a DCID and a third TA
  • the second RRC configuration message includes a time-frequency resource configuration of the uplink reference signal.
  • the sending of the second RRC configuration message may be performed before or after S111, which is not limited in this application.
  • the TA value between the UE 10 and the NR controller 30 is quickly determined by the eNB 20, and the efficiency of handover can be ensured.
  • the method may include:
  • the measurement response in S108 may further include a TA test command to facilitate the eNB 20 to instruct the UE 10 to transmit a TA test message. That is, the measurement response in S108 includes a DCID and a TA test command. Alternatively, the measurement response in S108 includes a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA test command.
  • the first RRC configuration message in S112 may further include the TA test instruction. That is, the first RRC configuration message in S112 may include a DCID and a TA test instruction. Alternatively, the first RRC configuration message in S112 may include a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA test instruction.
  • the TA test command may include a random access preamble sequence preamble index configured for the UE, a time-frequency resource information (such as a PRACH Mask Index) for transmitting a preamble index, and the like.
  • the UE 10 sends a TA test message.
  • the UE 10 may send the TA test message to the NR controller 30 according to the TA test command.
  • the TA test message may also be referred to as an uplink TA estimation signal or an uplink TA test signal, etc., which is not limited in this application.
  • the S1131 may further include: the UE 10 may randomly select a random access preamble sequence preamble index and a random access time-frequency resource according to the random access resource configuration broadcast by the NR controller, and send the TA test message to the NR controller 30.
  • the NR controller 30 transmits the TA value to the eNB 20.
  • the NR controller 30 can calculate the TA value based on the received TA test message.
  • the NR controller 30 may send a measurement configuration response message to the eNB 20, where the measurement configuration response message carries the TA value.
  • the eNB 20 transmits the TA value to the UE 10.
  • the eNB 20 may send a second RRC configuration message to the UE 10, where the second RRC configuration message carries the TA value.
  • the NR controller 30 may send the TA value directly to the UE 10. That is, S1132 and S1133 may be replaced with the following steps: The NR controller 30 transmits the TA value to the UE 10.
  • the NR controller 30 may first configure a dedicated preamble for the UE 10 to obtain a TA, as shown in FIG. 6, including:
  • the NR controller 30 transmits a dedicated preamble configuration to the UE 10.
  • the NR controller 30 may configure the UE 10 with a random access preamble sequence preamble index and transmit time-frequency resource information of the preamble index.
  • the UE 10 transmits a TA test message to the NR controller 30.
  • the TA test message may also be referred to as an uplink TA estimation signal or an uplink TA test signal, etc., this application This is not limited.
  • the UE 20 can directly access the NR controller 30 according to the dedicated preamble configuration without starting the NAS and S1-like interface establishment process, and does not perform data transmission, so that the handover efficiency can be improved.
  • the measurement response in S108 includes a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the NR controller 30 can first configure the UE 10 with a dedicated preamble to obtain the TA value, and then configure the DCID and the time-frequency resources of the uplink reference signal.
  • the first RRC configuration message in S112 also includes a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the TA value between the UE 10 and the NR controller 30 is determined by the NR controller 30 based on the TA test message transmitted by the UE 10, and the accuracy of the TA value can be ensured. Thereby ensuring the quality of the handover.
  • the handover decision of the UE 10 to perform handover may also be performed by the eNB 20, as shown in FIG.
  • Some or all of the steps S102 to S116 may be performed before S1171 shown in FIG. 7, and steps S102 to S116 may be referred to any of the foregoing embodiments shown in FIG. 3 to FIG. 6. To avoid repetition, details are not described herein again.
  • the NR controller 30 transmits measurement indication information to the eNB 20.
  • the NR controller 30 may determine whether the signal strength information carried by the first measurement report of the TP in the first TPG meets a handover threshold; if the signal strength information carried by the first measurement report of the TP in the first TPG is satisfied When the threshold is switched, the NR controller 30 executes S1171.
  • the switching threshold may be pre-configured on the NR controller 30.
  • the handover threshold may be received by the NR controller 30 from the base station eNB 20 of the LTE, for example, the measurement request in S106 includes the handover threshold.
  • the NR controller 30 may determine whether the signal strength information carried by the first measurement report of the TP in the first TPG in the preset time period satisfies a handover threshold; if within a preset duration, in the first TPG The signal strength information carried by the first measurement report of the TP satisfies the switching threshold, and the NR controller 30 executes S1171.
  • the switching threshold and the preset duration may be pre-configured on the NR controller 30.
  • the handover threshold and the preset duration may be received by the NR controller 30 from the base station eNB 20 of the LTE.
  • the measurement request in S106 includes the handover threshold and the preset duration.
  • the measurement indication information may include a first measurement report of the TP in the first TPG.
  • the measurement indication information may include indication information that satisfies the handover quality requirement, such as TURE or 1.
  • the eNB 20 performs a handover decision.
  • the eNB 20 decides whether or not to use the NR as one serving cell of the UE 10.
  • the eNB 20 may directly agree to use the NR as the serving cell of the UE 10.
  • the eNB 20 may perform a certain determination before deciding whether to agree to use the NR as the serving cell of the UE 10. For example, if the signal quality between the eNB 20 and the UE 10 is greater than or equal to a certain quality threshold, and the current load of the eNB 20 is less than a certain load threshold, the eNB 20 may decide to reject the NR as the serving cell of the UE 10.
  • the eNB 20 may decide to use the NR as the serving cell of the UE 10.
  • S1173 may be performed.
  • the eNB 20 transmits a handover request to the NR controller 30.
  • the NR controller 30 allocates a second TPG to the UE 10.
  • the NR controller 30 may, after receiving the handover request, use all or part of the TP in the first TPG that meets the handover threshold as the second TPG.
  • the NR controller 30 may also configure the UE 10 with a new ID (eg, new DCID) and/or transmission resources, and the like.
  • a new ID eg, new DCID
  • the NR controller 30 transmits a handover response to the eNB 20.
  • the handover response may include indication information of the second TPG.
  • the handover response may further include transmission resource information configured by the NR controller 30 for the UE 10, and/or a new ID assigned by the NR controller 30 to the UE 10.
  • the switching response may further include the configuration of layer one (L1) and/or layer two (L2) and/or layer three (L3), etc., which is not limited in this application.
  • S122 and S124 can refer to the related description in the foregoing embodiment of FIG. 3. To avoid repetition, details are not described herein again.
  • the UE performs the heterogeneous system detection, and the handover from the LTE system to the NR system can be completed based on the detection, and the continuous mobility between the LTE system and the NR system can be ensured, and the handover efficiency is ensured.
  • FIG. 8 is a schematic flowchart of a handover of a UE from NR to LTE according to an embodiment of the present application. It should be understood that FIG. 8 illustrates detailed communication steps or operations applied to switch from NR to LTE, but these steps or operations are merely examples, and other embodiments of the present application may perform other operations or various operations in FIG. Deformation. Moreover, the various steps in FIG. 8 may be performed in a different order than that presented in FIG. 8, and it is possible that not all operations in FIG. 8 are to be performed.
  • the UE 10, the NR controller 30, and the eNB 20 are shown in FIG.
  • the method shown in Figure 8 can include:
  • the NR controller 30 sends a measurement configuration to the UE 10.
  • the UE 10 is initially in the service range of the hyper cell.
  • the uplink reference signal is periodically or uninterrupted, so that the NR controller 30 can determine the location of the UE 10 according to the first measurement report of the uplink reference signal detected by the TP.
  • the NR controller 30 receives the first measurement report sent by each TP in the at least one TP, and the at least one TP is located at the edge of the hyper cell, and the NR controller 30 may determine that the UE 10 is also in the hyper cell. edge. Further, the NR controller 30 can execute S202.
  • the measurement configuration in S202 is used to instruct the UE 10 to perform downlink measurement.
  • the measurement configuration in S202 is used to indicate that the UE 10 periodically performs downlink measurement, where the measurement configuration may carry the cycle.
  • the eNB 20 transmits a downlink reference signal.
  • a base station i.e., eNB 20 in LTE periodically transmits a downlink reference signal.
  • eNB 20 a base station
  • the eNB 20 sends the downlink reference signal as an example, but the embodiment of the present application is not limited thereto. For example, it can be a downlink synchronization signal.
  • the UE 10 performs downlink measurement.
  • the UE 10 may perform downlink measurement according to the measurement configuration in S202, thereby detecting the downlink reference signal transmitted by the eNB 20.
  • the UE 10 may determine its signal quality according to the detected downlink reference signal, and may acquire the ID of the eNB 20.
  • the UE 10 sends a third measurement report to the NR controller 30.
  • the third measurement report may include a signal quality of the downlink reference signal and/or an ID of the LTE cell.
  • the third measurement report may further include an ID of the UE 10.
  • the NR controller 30 sends a handover request to the eNB 20.
  • the third measurement report includes a signal quality of the downlink reference signal, and if the signal quality is greater than or equal to the handover threshold, the NR controller 30 transmits a handover request to the eNB 20.
  • the handover request may include the ID of the UE 10.
  • the eNB 20 sends a handover response to the NR controller 30.
  • the NR controller 30 sends a handover command to the UE 10.
  • the UE 10 can perform a random access procedure with the eNB 20 after receiving the handover command, and thereafter execute S216.
  • the UE 10 performs data transmission with the eNB 20.
  • the handover from the NR system to the LTE system can be completed in the manner as shown in FIG. 8, and the method can ensure continuous movement of the UE between the NR system and the LTE system. Sexuality guarantees the efficiency of switching.
  • the method may include:
  • the NR controller 30 transmits measurement indication information to the eNB 20.
  • the measurement indication information may include a signal quality of the downlink reference signal and/or an ID of the eNB.
  • the measurement indication information may further include an ID of the UE 10.
  • the eNB can determine whether the signal quality of the downlink reference signal satisfies the handover threshold, and if so, execute S211.
  • the eNB 20 transmits the handover indication information to the NR controller 30.
  • the eNB 20 transmits handover indication information to the NR controller 30.
  • the eNB 20 can determine that the UE 10 is already within the service range of the eNB 20, then allow the UE 10 to perform handover, that is, allow the UE 10 to use the eNB 20 As a service cell.
  • the handover from the NR system to the LTE system can be completed in the manner as shown in FIG. 9, and the method can ensure the continuity between the UE and the LTE system. Mobility ensures the efficiency of switching.
  • FIG. 10 is a schematic flowchart of a method for cell reselection according to an embodiment of the present application. include:
  • the UE 10 receives the indication information of the TP 40.
  • the UE 10 may be in a mobile state in the hyper cell.
  • the TP of the outermost cell of the hyper cell (such as TP3) may send indication information to the UE 10. That is, the TP 40 in FIG. 10 is the TP of the outermost layer of the hyper cell, for example, TP3.
  • the indication information may be carried in a system message, or may be carried in a PSS or SSS or other downlink. In the common channel, this application is not limited thereto.
  • the indication information may be sent by the TP 40 in the form of a broadcast.
  • the indication information may also be sent by the NR controller to the UE 10 by using dedicated signaling.
  • the NR controller 30 can configure the outermost TP of the hyper cell, so that the outermost TP sends the indication information to the UE 10 after detecting the uplink reference signal of the UE 10.
  • the TP 40 (that is, the TP of the outermost cell of the hyper cell, for example, TP3) detects the uplink reference signal of the UE 10, and the signal strength of the uplink reference signal is lower than a certain threshold, the TP 40 may determine the UE. 10 has reached the edge of the hyper cell, and the TP 40 can send indication information to the UE 10.
  • the UE 10 performs downlink measurement according to the indication information.
  • the UE in the hyper cell may be in a power-saving state or an active state. That is, the UE has two states, and can switch between the two states. For example, when there is no service data transmission for a period of time after the UE data transmission is completed, the UE can be switched from the active state to the power-saving state; in the power-saving state, The UE may not monitor the dynamic control channel, and only needs to support a small amount of connection management, which consumes less power than the active state. For example, the power-saving UE may continue to reserve the dedicated user equipment identity, continue to send the uplink reference signal, and listen to the paging message.
  • the power-saving UE may also be referred to as an idle state UE or a UE called an ECO state, and ECO means Ecology, Conservation, and Optimization.
  • the activated state UE may also be referred to as a connected state UE.
  • the active state UE may enter the DRX.
  • the UE 10 may perform downlink measurement when the trigger condition is met.
  • the triggering condition may be: (1) receiving the indication information of the TP, (2) the UE has reached the edge of the hyper cell, (3), the UE is in a power-saving state, or is in an active state without service transmission, or At least one of the active states of DRX.
  • the UE 10 may perform downlink measurements.
  • the UE 10 performs the downlink measurement, that is, the UE 10 measures the downlink reference signal of each neighboring cell 50 according to the configuration of the NR controller or the configuration broadcast by the NR controller, and the neighboring cell 50 may be a cell of the eNB, or adjacent.
  • the UE 10 detects the downlink reference signal transmitted by the neighboring cell 50 at S203.
  • the UE 10 reselects to the neighboring cell.
  • the UE 10 if the UE 10 detects that the signal quality of the currently located hyper cell is lower than the first threshold, and/or, if the UE 10 detects that the signal quality of the downlink reference signal of the neighboring cell is higher than the second threshold, the UE 10 Perform cell reselection.
  • the second threshold is greater than the first threshold.
  • the UE 10 performs downlink measurement at S205 and performs cell reselection based on the measurement result.
  • the UE 10 may select a cell that resides in a signal condition as much as possible.
  • the UE in the hyper cell in the power-saving state or the no-service active state or the active state of the DRX can perform downlink measurement, thereby completing cell reselection.
  • FIG. 11 is a schematic flowchart of cell handover in the embodiment of the present application. The method shown in Figure 11 includes:
  • the first network device sends a dedicated connection identifier DCID to the second network device of the current serving cell of the user equipment UE, so that the second network device forwards the DCID to the UE, where the DCID is used by the The first network device identifies the UE.
  • the first network device sends a time-frequency resource configuration of the uplink reference signal to the second network device, so that the second network device forwards the time-frequency resource configuration of the uplink reference signal to the UE.
  • the first network device sends a handover indication message to the second network device, where the handover indication message is sent.
  • An identifier of a second node in the first network in which the first network device is located is included to cause the UE to perform data transmission with the node.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment
  • the first network where the first network device is located may be the NR. This application is not limited thereto.
  • the method may further include:
  • the first network device Sending, by the first network device, a measurement indication message to the first node, instructing the first node to measure an uplink reference signal sent by the UE, where the measurement indication message carries the DCID and a time frequency of the uplink reference signal Resource allocation
  • the first network device allocates a second node to the UE according to the first measurement report of the first node.
  • the node in S303 includes the second node, that is, the handover indication message includes an identifier of the second node, so that the UE performs data transmission with the second node.
  • the measurement indication message may further include a measurement threshold, so that the first node performs reporting based on the measurement threshold. Specifically, the first node sends the first measurement report to the first network device, if the first node detects that the signal strength of the uplink reference signal is greater than or equal to the measurement threshold.
  • the node may be a TP.
  • the first node is a TP in a first Transmission Point Group (TPG)
  • the second node is a TP in a second TPG.
  • the first network device receives the first measurement report of the TP in the first TPG, and allocates the second TPG to the UE according to the first measurement report of the TP in the first TPG.
  • the first measurement report here may be sent by the TP in the first TPG separately.
  • the node may be a DU and a TP
  • the first network device receives the first measurement report of the TP in the first TPG sent by the DU, and according to the TP in the first TPG.
  • a measurement report assigns a second TPG to the UE. That is, the TP in the first TPG separately transmits the first measurement report to the DU, and the first network device receives the first measurement report of the TP in the first TPG from the DU.
  • the TPs of the first TPG may belong to the same or different DUs
  • the TPs of the second TPG may belong to the same or different DUs.
  • the first TPG may include one or more TPs; the second TPG may include the first or multiple TPs.
  • the first network device may include: the first network device determining the first Whether the measurement result carried by the first measurement report of the node meets the handover threshold; if the measurement result carried by the first measurement report of the first node meets the handover threshold, the first network device is the The UE allocates the second node.
  • the switching threshold may be pre-stored or pre-configured in the first network device, or may be acquired by the first network device from the second network device. For example, prior to this, the first network device may receive the handover threshold from the second network device.
  • the first network device by using the first measurement report of the first node, to allocate the second node to the UE, may include: determining, by the first network device, that the preset time is Whether the measurement result carried by the first measurement report of the first node meets a handover threshold; if the measurement result carried by the first measurement report of the first node meets the handover threshold, the a network device assigning the second to the UE node.
  • the preset duration and the handover threshold may be pre-stored or pre-configured in the first network device, or may be acquired by the first network device from the second network device. For example, before this, the first network device may receive the preset duration and the switching threshold from the second network device.
  • S301 and S302 can be simultaneously executed.
  • the first network device receives the measurement request sent by the second network device.
  • S301 and S302 may include: the first network device sends a measurement response to the second network device, and the measurement response includes a DCID and a time-frequency resource configuration of the uplink reference signal. That is, the DCID and the time-frequency resource configuration of the uplink reference signal include a measurement response corresponding to the measurement request.
  • the related description refer to the detailed description of S106 and S108 in the foregoing embodiment. To avoid repetition, details are not described herein again.
  • the second network device may determine the TA value between the first network device and the UE, and correspondingly, the first network device may receive the TA value sent by the second network device.
  • the first network device may determine the TA value between the UE and the UE, and correspondingly, the first network device sends the TA test command to the second network device, so that The second network device instructs the UE to send a TA test message; the first network device receives the TA test message sent by the UE; the first network device determines the TA value according to the TA test message; the first network device sends the TA value to UE.
  • the first network device may send the TA value to the UE.
  • the first network device may send the TA value to the second network device, and the second network device forwards the TA value to the UE.
  • the S303 may refer to the related description of the S120 in the foregoing embodiment.
  • the handover indication message may further include: the transmission resource information configured by the first network device for the UE, and/or the A new ID or the like assigned by the first network device to the UE. To avoid repetition, we will not repeat them here.
  • the first network device in the embodiment of the present application can send the time-frequency resource configuration of the DCID and the uplink reference signal to the second network device, so that the second network device can be used to instruct the UE to send the uplink reference signal. Further, the first network device may instruct the UE to use the first network device as a serving cell by using the handover indication message, and perform data communication with the node on the first network side, so as to complete the handover of the second network device to the first network device. To ensure the continuity of the UE's business.
  • FIG. 12 is another schematic flowchart of cell handover in the embodiment of the present application.
  • the method shown in Figure 13 includes:
  • the UE receives a first RRC configuration message sent by a second network device of the current serving cell, where the first RRC configuration message includes a DCID, where the DCID is used by the first network device to identify the UE.
  • the UE receives a second RRC configuration message sent by the second network device, where the second RRC configuration message includes a time-frequency resource configuration of an uplink reference signal.
  • the UE sends an uplink reference signal according to the first RRC configuration message and the second RRC configuration message.
  • the UE receives a handover command sent by the second network device, where the handover command includes an identifier of a second node that is allocated by the first network device to the UE.
  • the UE performs data transmission with the second node according to the handover command.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment, and correspondingly, the first network where the first network device is located
  • the network can be NR. This application is not limited thereto.
  • S401 and S402 can be performed at the same time, where the first RRC configuration message and the second RRC configuration message can be the same message, for example, the first RRC configuration message, and the first RRC configuration message includes the DCID and the uplink. Time-frequency resource configuration of the reference signal.
  • the method may include: performing, by the UE in the service scope of the second network device, heterogeneous system detection; the UE generating a second measurement report according to the result of the heterogeneous system detection, The second measurement report includes a cell ID of the first network side where the first network device is located; and the UE sends the second measurement report to the second network device.
  • the UE may perform the heterogeneous system detection when the trigger condition is met; or the UE may periodically perform the heterogeneous system detection.
  • the triggering condition may be that the signal quality of the second network device detected by the UE is lower than a preset threshold.
  • the UE may receive the measurement control message sent by the second network device, and perform the different system measurement according to the measurement control message.
  • the measurement control message may include the foregoing preset threshold, so that the UE may perform the heterogeneous system detection based on the trigger condition.
  • the measurement control message may include a size of a period such that the UE may perform heterogeneous system detection based on the period.
  • the performing the inter-system detection by the UE may include: performing, by the UE, the inter-system detection, and detecting the primary synchronization signal PSS, the secondary synchronization signal SSS, and the downlink reference signal of the first network sent by the first node in the first network. At least one of the system information SI.
  • the first node in the embodiment of the present application may include a TP in the first TPG
  • the second node may include a TP in the second TPG
  • the method may further include: the UE completing uplink synchronization with the first network device.
  • the UE receives the TA value sent by the second network device.
  • the TA value is determined by the second network device according to a first TA value between the second network device and the UE and a second TA value between the second network device and the first network device.
  • the UE before S403, the UE receives a TA test command sent by the second network device; according to the TA test command, the UE sends a TATA test message to the first network device; and, the UE receives the first The TA value sent by the network device.
  • the UE may receive the TA value directly from the first network device.
  • the UE may receive the TA value determined by the first network device from the second network device. That is, the first network device may send the TA value to the second network device, and the second network device forwards the TA value to the UE.
  • the TA value may be carried in the second RRC configuration message. That is, the second RRC configuration message may include a time-frequency resource configuration and a TA value of the uplink reference signal. It can be understood that if the second RRC configuration message is the same message as the first RRC configuration message, the first RRC configuration message may include a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the UE may send an uplink reference signal to a node in the first network device by using a time-frequency resource configuration of the uplink reference signal based on the DCID.
  • the TP in the first TPG in the first network side where the first network device is located can detect the uplink reference signal and send the first measurement report to the first network device.
  • the handover command in S404 may include an identifier of the second node.
  • the UE According to the switching command, data transmission is performed with the second node.
  • the handover command in S404 may include indication information of the second TPG.
  • the UE may perform data transmission with the TP in the second TPG according to the handover command.
  • the UE may use the first network where the first network device is located as one serving cell of the UE according to the handover command; or, the UE may switch the serving cell to the first network device according to the handover instruction.
  • the first network may be used to switch the serving cell to the first network device according to the handover instruction.
  • the UE in the embodiment of the present application can send the uplink reference information according to the time-frequency resource configuration of the second network device to send the DCID and the uplink reference signal, and further complete the handover of the second network device to the first network device based on the handover command, and ensure The continuity of the business.
  • FIG. 13 is another schematic flowchart of cell handover in the embodiment of the present application.
  • the method shown in Figure 13 includes:
  • the second network device receives a time-frequency resource configuration of a DCID and an uplink reference signal sent by the first network device, where the DCID is used by the first network device to identify the UE.
  • the second network device sends a first RRC configuration message to the UE, where the first RRC configuration message includes the DCID.
  • the second network device sends a second RRC configuration message to the UE, where the second RRC configuration message includes a time-frequency resource configuration of the uplink reference signal, so that the UE is configured according to the first RRC configuration message and the The second RRC configuration message sends an uplink reference signal.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment
  • the first network where the first network device is located may be the NR. This application is not limited thereto.
  • the second network device may receive a second measurement report sent by the UE, where the second measurement report includes a cell ID of the first network where the first network device is located.
  • the cell ID here may be determined by the UE performing an inter-system measurement.
  • the second network device may send a measurement request to the first network device, and receive a measurement response of the first network device, where the measurement response may include a DCID and a time-frequency resource configuration of the uplink reference signal.
  • the second network device may send a measurement control message to the UE, so that the UE performs the inter-system measurement based on the measurement control message.
  • the measurement request may include a switching threshold and/or a preset duration.
  • the second network device can receive the time-frequency resource configuration of the DCID and the uplink reference signal by measuring the response.
  • S502 and S503 may be performed at the same time, where the first RRC configuration message and the second RRC configuration message may be the same message, for example, a first RRC configuration message, where the first RRC configuration message includes a DCID and an uplink.
  • Time-frequency resource configuration of the reference signal That is, the second network device may send a first RRC configuration message to the UE, where the first RRC configuration message includes a time-frequency resource configuration of the DCID and the uplink reference signal, so that the UE according to the DCID and the time-frequency resource of the uplink reference signal Configure to send uplink reference signals.
  • the method may further include: the second network device according to the first TA value between the second network device and the UE, and the second network device and the first network device a second TA value, determining a TA value between the UE and the first network device; and the second network device transmitting the determined TA value to the UE.
  • the method may further include: the second network device receiving the TA value sent by the first network device; and the second network device sending the TA value to the UE.
  • the method may further include: the second network device receives the TA test command sent by the first network device, and the second network device forwards the TA test command to the UE, so that the UE sends the UE to the first network device. Send a TA test message. Further, the second network device may receive the TA value determined by the first network device based on the TA test message, and send the TA value to the UE.
  • the TA value may be carried in the second RRC configuration message, that is, the second RRC configuration message may include a time-frequency resource configuration and a TA value of the uplink reference signal. It can be understood that if the second RRC configuration message is the same message as the first RRC configuration message, the first RRC configuration message may include a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the second network device may receive the handover indication information sent by the first network device, where the handover indication information includes an identifier of the second node in the first network where the first network device is located; and the second network device is configured according to the handover The indication information is sent to the UE, where the handover command includes an identifier of the second node, where the handover command is used to indicate that the UE performs data transmission with the second node.
  • the second node may be a TP in the second TPG.
  • the handover indication message may further include: the transmission resource information configured by the first network device for the UE, and/or the new ID allocated by the first network device to the UE.
  • the handover command may further include: the transmission resource information configured by the first network device for the UE, and/or the new ID allocated by the first network device to the UE.
  • the UE that is in the service range of the second network device can be assisted by the second network device to complete the handover of the second network device to the first network device, and can include the continuity of the service of the UE.
  • FIG. 14 is a structural block diagram of a network device according to an embodiment of the present application.
  • the network device 100 shown in FIG. 14 may be the first network device 100, including the transmitting unit 120, the receiving unit 140, and the processing unit 160.
  • the sending unit 120 is configured to: send, to the second network device that is currently serving the cell of the user equipment UE, a dedicated connection identifier DCID, so that the second network device forwards the DCID to the UE, where the DCID is used by the UE
  • the first network device identifies the UE; and is further configured to send, to the second network device, a time-frequency resource configuration of the uplink reference signal, so that the second network device forwards the time-frequency resource configuration of the uplink reference signal
  • the UE is further configured to send a handover indication message to the second network device, where the handover indication message includes an identifier of a second node in the first network where the first network device is located, to enable the UE Data transmission with the second node.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment
  • the first network where the first network device is located may be the NR. This application is not limited thereto.
  • the handover indication message may further include: transmission resource information configured by the first network device for the UE, and/or a new ID allocated by the first network device to the UE. In this way, the UE can communicate with the second node according to the transmission resource information.
  • the sending unit 120 is further configured to send the measurement indication message to the first node, where the first node is configured to measure an uplink reference signal sent by the UE, where the measurement indication message carries the The DCID and the time-frequency resource configuration of the uplink reference signal.
  • the receiving unit 140 is configured to receive the first sent by the first node And a measurement report, where the first measurement report carries a measurement result of the uplink reference signal sent by the UE.
  • the processing unit 160 is configured to allocate the second node to the UE according to the first measurement report of the first node.
  • the measurement result of the uplink reference signal may be the signal strength information of the uplink reference signal.
  • the first measurement report may carry signal strength information of the uplink reference signal sent by the UE.
  • the processing unit 160 may be specifically configured to: determine whether the measurement result carried by the first measurement report of the first node meets a handover threshold; and if the measurement result carried by the first measurement report of the first node is satisfied, And the switching threshold, the second node is allocated to the UE.
  • the processing unit 160 may be specifically configured to: determine whether the measurement result carried by the first measurement report of the first node within a preset duration satisfies the handover threshold.
  • the preset duration and/or the handover threshold may be preset in the first network device, or may be acquired from the second network device.
  • the sending unit 120 may be further configured to receive the preset duration and/or the switching threshold from the second network device.
  • the receiving unit 140 may be configured to: receive the measurement request sent by the second network device.
  • the time-frequency resource configuration of the DCID and the uplink reference signal is included in a measurement response corresponding to the measurement request. That is, the sending unit 120 may be specifically configured to send a measurement response to the second network device, and the measurement response includes a DCID and a time-frequency resource configuration of the uplink reference signal.
  • the uplink synchronization between the UE and the first network device may also be completed.
  • the receiving unit 140 may be configured to receive a TA value sent by the second network device.
  • the value of the TA may be determined by the second network device, for example, may be the first network value between the second network device and the UE, and the first between the second network device and the first network device. The two TA values are determined.
  • the sending unit 120 may be configured to send a TA test instruction to the second network device, so that the second network device instructs the UE to send a TA test message.
  • the receiving unit 140 may be configured to receive the TA test message sent by the UE.
  • the processing unit 160 may be configured to determine a TA value according to the TA test message.
  • the sending unit 120 is further configured to send the TA value to the UE. That is, the TA value here may be determined by the first network device based on the TA test message.
  • the sending unit 120 sends the TA value to the UE, where the TA value is sent to the second network device, so that the second network device forwards the TA value to the UE.
  • the sending unit 120 may be implemented by a transmitter
  • the receiving unit 140 may be implemented by a receiver
  • the processing unit 160 may be implemented by a processor.
  • the first network device 100 may include The processor 110, the transmitter 130, the receiver 150, and the memory 170.
  • the memory 170 can be used to store code and the like executed by the processor 110.
  • the various components in the first network device 100 are coupled together by a bus system 190, which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • a bus system 190 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the network device 100 shown in FIG. 14 or the network device 100 shown in FIG. 15 can implement the processes performed by the NR controller or the first network device in the foregoing method embodiments of FIG. 1 to FIG. 13, in order to avoid repetition, here is not Let me repeat.
  • FIG. 16 is a structural block diagram of a UE according to an embodiment of the present application.
  • the UE 200 shown in FIG. 16 may include a receiving unit 220, a transmitting unit 240, and a processing unit 260.
  • the receiving unit 220 is configured to receive a first RRC configuration message sent by the second network device of the current serving cell, where The first RRC configuration message includes a DCID, where the DCID is used by the first network device to identify the UE, and the receiving unit 220 is further configured to receive a second RRC configuration message sent by the second network device, where the second The RRC configuration message includes a time-frequency resource configuration of the uplink reference signal;
  • the sending unit 240 is configured to send an uplink reference signal according to the first RRC configuration message and the second RRC configuration message;
  • the receiving unit 220 is further configured to receive a handover command sent by the second network device, where the handover command includes an identifier of the second node that is allocated by the first network device to the UE;
  • the processing unit 260 is configured to perform data transmission with the second node according to the switching command.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment
  • the first network where the first network device is located may be the NR. This application is not limited thereto.
  • the processing unit 260 is further configured to: perform a different system detection; and generate a second measurement report according to the result of the different system detection, where the second measurement report includes where the first network device is located.
  • the cell ID of the first network is further configured to send the second measurement report to the second network device.
  • the processing unit 260 may be specifically configured to: when the trigger condition is met, perform the heterogeneous system detection; or periodically perform the heterogeneous system detection.
  • the triggering condition may be that the signal quality of the second network device detected by the processing unit 260 is lower than a preset threshold.
  • the receiving unit 220 is further configured to receive a measurement control message sent by the second network device.
  • the processing unit 260 may be specifically configured to perform the different system measurement according to the measurement control message. Subsequently, the processing unit 260 may generate a second measurement report according to the result of the different system detection. And sending, by the sending unit 240, the second measurement report to the second network device.
  • the processing unit 260 performing the heterogeneous system detection may be: performing the heterogeneous system detection, and detecting the primary synchronization signal PSS, the secondary synchronization signal SSS, and the downlink reference of the first network sent by the first node in the first network. At least one of the signal and system information SI.
  • uplink synchronization with the first network device may also be completed.
  • the receiving unit 220 is further configured to receive a TA value sent by the second network device.
  • the TA value may be determined by the second network device, or may be received by the second network device from the first network device.
  • the receiving unit 220 may receive the TA test command sent by the second network device. According to the TA test command, the sending unit 240 sends the TA test message to the first network device. The receiving unit 220 further receives the TA value sent by the first network device.
  • the TA value may be sent by the first network device to the second network device and then sent by the second network device to the UE.
  • the TA value may be included in a second RRC configuration message sent by the second network device. That is, the receiving unit 220 receives the second RRC configuration message sent by the second network device, and the second RRC configuration message may include a time-frequency resource configuration and a TA value of the uplink reference signal.
  • the first RRC configuration message is the same as the second RRC configuration message. Message. It can be seen that the first RRC configuration message may include a time-frequency resource configuration of the DCID and the uplink reference signal; or the first RRC configuration message may include a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the receiving unit 220 may be implemented by a receiver
  • the sending unit 240 may be implemented by a transmitter
  • the processing unit 260 may be implemented by a processor.
  • the UE 200 may include the processor 210.
  • the memory 270 can be used to store code and the like executed by the processor 210.
  • a bus system 290 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the UE 200 shown in FIG. 16 or the UE 200 shown in FIG. 17 can implement the processes performed by the UE in the foregoing method embodiments of FIG. 1 to FIG. 13 . To avoid repetition, details are not described herein again.
  • FIG. 18 is a structural block diagram of a network device according to an embodiment of the present application.
  • the network device 300 shown in FIG. 18 may be the second network device 300, and may include a receiving unit 320, a sending unit 340, and a processing unit 360.
  • the receiving unit 320 is configured to receive a time-frequency resource configuration of a DCID and an uplink reference signal sent by the first network device, where the DCID is used by the first network device to identify the UE.
  • the sending unit 340 is configured to send a first RRC configuration message to the UE, where the first RRC configuration message includes the DCID.
  • the sending unit 340 is further configured to send a second RRC configuration message to the UE, where the second RRC configuration message includes a time-frequency resource configuration of the uplink reference signal, so that the UE is configured according to the first RRC configuration message and the The second RRC configuration message sends an uplink reference signal.
  • the first network device in the embodiment of the present application is a network device in a user-centric system
  • the second network device is a network device in a network-centric system
  • the first network device is the NR controller in the foregoing embodiment
  • the second network device is the eNB in the foregoing embodiment
  • the first network where the first network device is located may be the NR. This application is not limited thereto.
  • the receiving unit 320 is further configured to receive a second measurement report sent by the UE, where the second measurement report includes a cell ID of the first network where the first network device is located.
  • the sending unit 340 is further configured to send a measurement request to the first network device.
  • the receiving unit 320 is further configured to receive a measurement response sent by the first network device, where the measurement response includes a time-frequency resource configuration of the DCID and an uplink reference signal.
  • the sending unit 340 is further configured to send a measurement control message to the UE to instruct the UE to perform an inter-system measurement.
  • the receiving unit 320 is further configured to receive a second measurement report sent by the UE, where the second measurement report includes a cell ID of the first network where the first network device is located.
  • the sending unit 340 is further configured to send a measurement request to the first network device.
  • the receiving unit 320 is further configured to receive a measurement response sent by the first network device, where the measurement response includes a time-frequency resource configuration of the DCID and an uplink reference signal.
  • the measurement request may include a handover threshold, or the measurement request may include a handover threshold and a preset duration.
  • the processing unit 360 may be configured to: according to a first TA value between the second network device and the UE, and between the second network device and the first network device a second TA value determining a third TA value between the UE and the first network device.
  • the sending unit 340 is further configured to send the determined third TA value to the UE. It can be understood that the third TA value here is the TA value between the UE and the first network device.
  • the receiving unit 320 may be configured to receive a TA value sent by the first network device.
  • the sending unit 340 can be configured to send the TA value to the UE.
  • the receiving unit 320 may be configured to receive a TA test instruction sent by the first network device.
  • the sending unit 340 can be configured to send a TA test instruction to the UE to instruct the UE to send a TA test message to the first network device.
  • the receiving unit 320 may be configured to receive a TA value sent by the first network device.
  • the sending unit 340 can be configured to send the TA value to the UE.
  • the TA value may be determined by the first network device based on the TA test message.
  • the TA value sent by the sending unit 340 may be included in the second RRC configuration message. That is, the sending unit 340 may send a second RRC configuration message to the UE, where the second RRC configuration message includes a time-frequency resource configuration and a TA value of the uplink reference signal.
  • the first RRC configuration message and the second RRC configuration message are the same message. It can be seen that the first RRC configuration message may include a time-frequency resource configuration of the DCID and the uplink reference signal; or the first RRC configuration message may include a DCID, a time-frequency resource configuration of the uplink reference signal, and a TA value.
  • the receiving unit 320 is further configured to receive the handover indication information that is sent by the first network device, where the handover indication message includes the first network where the first network device is located.
  • the identity of the second node is further configured to send, according to the handover indication information, a handover command to the UE, where the handover command includes an identifier of the second node, where the handover command is used to indicate the UE and the first Two nodes perform data transmission.
  • the handover indication message may further include: transmission resource information configured by the first network device for the UE, and/or a new ID allocated by the first network device to the UE.
  • the receiving unit 320 may be implemented by a receiver
  • the sending unit 340 may be implemented by a transmitter
  • the processing unit 360 may be implemented by a processor.
  • the network device 300 may include a processor. 310, a transmitter 330, a receiver 350, and a memory 370.
  • the memory 370 can be used to store code and the like executed by the processor 310.
  • the various components in the network device 300 are coupled together by a bus system 390, which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the network device 300 shown in FIG. 18 or the network device 300 shown in FIG. 19 can implement the processes performed by the eNB or the second network device in the foregoing method embodiments of FIG. 1 to FIG. .
  • FIG. 20 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • the system chip 400 of FIG. 20 includes an input interface 410, an output interface 420, at least one processor 430, and a memory 440.
  • the input interface 410, the output interface 420, the processor 430, and the memory 440 are connected by a bus.
  • the processor 430 is configured to execute code in the memory 440, and when the code is executed, the processor 430 implements the method of FIG. 1-10 performed by the NR controller or the first network device.
  • FIG. 21 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • the system chip 500 of FIG. 21 includes an input interface 510, an output interface 520, at least one processor 530, and a memory 540.
  • the input interface 510, the output interface 520, the processor 530, and the memory 540 are connected by a bus.
  • the processor 530 is configured to execute code in the memory 540, and when the code is executed, the processor 530 implements the method performed by the UE in FIGS. 1-10.
  • FIG. 22 is a schematic structural diagram of a system chip according to an embodiment of the present application.
  • the system chip 600 of FIG. 22 includes an input interface 610, an output interface 620, at least one processor 630, and a memory 640.
  • the input interface 610, the output interface 620, the processor 630, and the memory 640 are connected by a bus.
  • the processor 630 is configured to execute the The code in memory 640, when the code is executed, the processor 630 implements the method of Figure 1-10 performed by an eNB or a second network device.

Landscapes

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

Abstract

La présente invention concerne, selon un mode de réalisation, un procédé de transfert intercellulaire. Le procédé comprend les étapes suivantes : un premier dispositif de réseau envoie un DCID et une attribution de ressource temps-fréquence d'un signal de référence de liaison montante à un second dispositif de réseau, de sorte que le second dispositif de réseau envoie le DCID et l'attribution de ressource temps-fréquence du signal de référence de liaison montante à un UE ; l'UE peut envoyer le signal de référence de liaison montante selon le DCID et l'attribution de ressource temps-fréquence du signal de référence de liaison montante ; en outre, le premier dispositif de réseau envoie un message d'indication de transfert au second dispositif de réseau, le message d'indication de transfert comprenant un identifiant d'un second nœud dans un premier réseau où se trouve le premier dispositif de réseau ; et le second dispositif de réseau envoie une commande de transfert à l'UE, de façon à donner l'ordre à l'UE de transmettre des données au second nœud. Au moyen du procédé dans le mode de réalisation de la présente invention, un UE peut être transféré entre deux systèmes de réseau, et par conséquent la continuité de service est assurée, l'efficacité du transfert est améliorée, et la qualité de transmission peut être assurée.
PCT/CN2017/098026 2016-08-19 2017-08-18 Procédé de transfert intercellulaire, équipement utilisateur et dispositif de réseau WO2018033136A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610692263.2A CN107770824B (zh) 2016-08-19 2016-08-19 用于小区切换的方法、用户设备及网络设备
CN201610692263.2 2016-08-19

Publications (1)

Publication Number Publication Date
WO2018033136A1 true WO2018033136A1 (fr) 2018-02-22

Family

ID=61196351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/098026 WO2018033136A1 (fr) 2016-08-19 2017-08-18 Procédé de transfert intercellulaire, équipement utilisateur et dispositif de réseau

Country Status (2)

Country Link
CN (1) CN107770824B (fr)
WO (1) WO2018033136A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI682676B (zh) * 2018-12-06 2020-01-11 中華電信股份有限公司 基於上行參考信號的換手方法及無線通訊系統
CN111800804A (zh) * 2019-04-03 2020-10-20 宏碁股份有限公司 调适性量测设置控制的技术
CN112865947A (zh) * 2018-04-13 2021-05-28 中兴通讯股份有限公司 测量间隔的配置方法及装置、存储介质、电子装置
IT201900024000A1 (it) * 2019-12-13 2021-06-13 Telecom Italia Spa Metodo e sistema per sfruttare connessioni ad onde millimetriche
CN113055963A (zh) * 2021-03-30 2021-06-29 联想(北京)有限公司 一种通信网络的信息处理方法及服务设备
WO2021226952A1 (fr) * 2020-05-14 2021-11-18 Qualcomm Incorporated Invite de reconnexion de service sans fil sur la base d'une condition de changement de signal
CN114844614A (zh) * 2019-08-02 2022-08-02 华为技术有限公司 一种提升终端设备测量能力的方法、芯片以及终端设备

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110351789A (zh) 2018-04-03 2019-10-18 维沃移动通信有限公司 用于小区变换的方法和设备
EP3823357B1 (fr) * 2018-07-20 2022-08-31 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de gestion de session, dispositif terminal et dispositif de réseau
CN113475116B (zh) * 2019-07-05 2023-10-10 Oppo广东移动通信有限公司 一种时间提前的获取方法、网络设备、终端设备
CN116233949A (zh) * 2021-12-03 2023-06-06 华为技术有限公司 切换方法、通信装置及通信系统
CN117202274A (zh) * 2022-05-30 2023-12-08 大唐移动通信设备有限公司 上行同步方法、装置及其相关设备
CN117241399A (zh) * 2022-06-15 2023-12-15 华为技术有限公司 频域资源配置方法及装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105745852A (zh) * 2013-11-21 2016-07-06 华为技术有限公司 用于非蜂窝式无线接入的系统和方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010002692A1 (fr) * 2008-06-30 2010-01-07 Interdigital Patent Holdings, Inc. Procédé et dispositif pour effectuer un transfert dans un réseau à accès radio terrestre universel évolué
US10027445B2 (en) * 2013-09-26 2018-07-17 Sharp Kabushiki Kaisha Terminal, base station, and communication method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105745852A (zh) * 2013-11-21 2016-07-06 华为技术有限公司 用于非蜂窝式无线接入的系统和方法

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL.: "RRM Measurement for NR", 3GPPTSG RAN WG1 MEETING #86 RL-167200, 12 August 2016 (2016-08-12), XP051142223 *
HUAWEI ET AL.: "UE centric design for NR", 3GPP TSG-RAN WG2 MEETING #95 R2-165439., 13 August 2016 (2016-08-13), XP051134190 *
HUAWEI ET AL.: "UE mobility tracking in ''active state'' and in '' power saving'' state", 3GPP TSG-RAN2 MEETING #94 R2-164129, 13 May 2016 (2016-05-13), XP051095266 *
HUAWEI: "Discussion on LTE-NR handover", 3GPP TSG-RAN WG2 MEETING #95 R2-165450, 13 August 2016 (2016-08-13), XP051134196 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112865947A (zh) * 2018-04-13 2021-05-28 中兴通讯股份有限公司 测量间隔的配置方法及装置、存储介质、电子装置
CN112865947B (zh) * 2018-04-13 2023-09-26 中兴通讯股份有限公司 测量间隔的配置方法及装置、存储介质、电子装置
US11974239B2 (en) 2018-04-13 2024-04-30 Zte Corporation Measurement gap configuration method and device, storage medium, and electronic device
TWI682676B (zh) * 2018-12-06 2020-01-11 中華電信股份有限公司 基於上行參考信號的換手方法及無線通訊系統
CN111800804A (zh) * 2019-04-03 2020-10-20 宏碁股份有限公司 调适性量测设置控制的技术
CN114844614A (zh) * 2019-08-02 2022-08-02 华为技术有限公司 一种提升终端设备测量能力的方法、芯片以及终端设备
IT201900024000A1 (it) * 2019-12-13 2021-06-13 Telecom Italia Spa Metodo e sistema per sfruttare connessioni ad onde millimetriche
WO2021116245A1 (fr) * 2019-12-13 2021-06-17 Telecom Italia S.P.A. Procédé et système pour exploiter des connexions à ondes millimétriques
WO2021226952A1 (fr) * 2020-05-14 2021-11-18 Qualcomm Incorporated Invite de reconnexion de service sans fil sur la base d'une condition de changement de signal
CN113055963A (zh) * 2021-03-30 2021-06-29 联想(北京)有限公司 一种通信网络的信息处理方法及服务设备

Also Published As

Publication number Publication date
CN107770824B (zh) 2020-03-10
CN107770824A (zh) 2018-03-06

Similar Documents

Publication Publication Date Title
WO2018033136A1 (fr) Procédé de transfert intercellulaire, équipement utilisateur et dispositif de réseau
US10869272B2 (en) Communication method and apparatus applied to hyper cell
EP3477996B1 (fr) Réseau avec terminaux d2d
US11082895B2 (en) Subband switching method, device, and system
RU2668071C1 (ru) Способ и устройство оптимизации сигнализации
US10764806B2 (en) Method and apparatus for assisting terminal in measuring
EP3413623B1 (fr) Procédé et appareil de communication appliqués à une super cellule
EP3809756B1 (fr) Procédés de gestion de mobilité, appareil, système de communication et support de stockage lisible par ordinateur
WO2020154870A1 (fr) Procédé de communication sans fil, dispositif terminal et dispositif réseau
US10708838B2 (en) Method and apparatus for transmitting data
WO2014176780A1 (fr) Procédé de mesure, procédé et dispositif de commande de mesure
WO2019024812A1 (fr) Procédé et appareil de mesure de cellule voisine
KR20150065874A (ko) 디바이스 투 디바이스 통신, 기지국 및 통신 시스템에서의 핸드오버 방법
WO2022068797A1 (fr) Procédé d'accès au réseau, appareil d'accès au réseau, terminal, et dispositif côté réseau
TW201815194A (zh) 通訊方法、終端裝置和網路裝置
US10278101B2 (en) Cell discovery method and apparatus
WO2023087907A1 (fr) Procédé et appareil de commutation de liaison latérale, terminal, support de stockage et produit-programme
WO2017148379A1 (fr) Procédé et appareil de communication appliqués à une supercellule
WO2022022082A1 (fr) Procédé de communication et appareil de communication
CN114258058A (zh) 测量方法、测量装置、终端及网络设备
WO2022068728A1 (fr) Procédé et appareil de configuration, ainsi que terminal et dispositif côté réseau
RU2722418C2 (ru) Способ и устройство оптимизации сигнализации
EP4080913A1 (fr) Procédé et appareil de communication
WO2023282353A1 (fr) Dispositif de communication, station de base et procédé de communication
JP2023010465A (ja) ユーザ装置、基地局及び通信制御方法

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: 17841108

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17841108

Country of ref document: EP

Kind code of ref document: A1