WO2020186464A1 - 一种小区切换的处理方法、设备及存储介质 - Google Patents

一种小区切换的处理方法、设备及存储介质 Download PDF

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Publication number
WO2020186464A1
WO2020186464A1 PCT/CN2019/078777 CN2019078777W WO2020186464A1 WO 2020186464 A1 WO2020186464 A1 WO 2020186464A1 CN 2019078777 W CN2019078777 W CN 2019078777W WO 2020186464 A1 WO2020186464 A1 WO 2020186464A1
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Prior art keywords
information
terminal device
target cell
network device
mac
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PCT/CN2019/078777
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English (en)
French (fr)
Inventor
唐海
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Oppo广东移动通信有限公司
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Priority to PCT/CN2019/078777 priority Critical patent/WO2020186464A1/zh
Priority to CN201980064502.1A priority patent/CN112789884B/zh
Publication of WO2020186464A1 publication Critical patent/WO2020186464A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation

Definitions

  • the present invention relates to the field of wireless communication technology, and in particular to a processing method, equipment and storage medium for cell handover.
  • conditional handover after receiving a conditional handover command, the terminal device does not immediately perform the cell handover; therefore, the target network device needs a long time to maintain and manage the response to the source network device Configuration resources.
  • the target network device may preferentially serve other terminal devices in the target cell for some reasons, and decide to cancel the resources and configuration reserved for the terminal device corresponding to the conditional handover command.
  • how to deal with the cell handover initiated by the terminal device can reduce the handover delay and improve the success rate of the cell handover. There is currently no effective solution.
  • the embodiments of the present invention provide a cell handover processing method, device, and storage medium, which can reduce handover delay and improve cell handover when the target network device does not allow terminal equipment based on conditional handover to access. Success rate.
  • an embodiment of the present invention provides a method for processing cell handover, including: a terminal device receives first information sent by a network device, where the first information is used to characterize that the terminal device is denied access to the network device.
  • the first target cell is used to characterize that the terminal device is denied access to the network device.
  • an embodiment of the present invention provides a method for processing cell handover, including: a network device sends first information to a terminal device, where the first information is used to characterize that the terminal device is denied access to the network device.
  • the first target cell is used to characterize that the terminal device is denied access to the network device.
  • an embodiment of the present invention provides a terminal device.
  • the terminal device includes: a first receiving unit configured to receive first information sent by a network device, where the first information is used to characterize the rejection of the terminal device from receiving Into the first target cell corresponding to the network device.
  • an embodiment of the present invention provides a network device, the network device includes: a second sending unit configured to send first information to a terminal device, and the first information is used to characterize that the terminal device is denied access The first target cell corresponding to the network device.
  • an embodiment of the present invention provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above-mentioned terminal when the computer program is running. Steps of the cell handover processing method executed by the device.
  • an embodiment of the present invention provides a network device, including a processor and a memory for storing a computer program that can run on the processor, wherein the processor is used to execute the above network when the computer program is running. Steps of the cell handover processing method executed by the device.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the cell handover processing method performed by the terminal device.
  • an embodiment of the present invention provides a storage medium that stores an executable program, and when the executable program is executed by a processor, it implements the cell handover processing method performed by the network device.
  • the cell handover processing method provided by the embodiment of the present invention includes: a terminal device receives first information sent by a network device, and the first information is used to characterize that the terminal device is denied access to the first target cell corresponding to the network device .
  • the network device preferentially serves other terminal devices in the target cell for some reasons, and decides to cancel the resources and configuration reserved for the terminal device corresponding to the conditional handover command, the terminal device is notified through the first information that it cannot access the terminal device.
  • the first target cell corresponding to the network device realizes the effective management of the network device on the conditional handover configuration resources, reduces the number and time of the terminal device trying to switch access under the cell congestion, reduces the handover delay, and improves the cell handover The success rate.
  • Fig. 1 is a schematic diagram of the flow of cell handover of the present invention
  • Figure 2 is a schematic diagram of the random access process based on contention of the present invention
  • Figure 3 is a schematic diagram of the non-competition-based random access process of the present invention.
  • Figure 4 is a schematic diagram of the random access process based on conditional handover according to the present invention.
  • FIG. 5 is a schematic diagram of the composition structure of a communication system according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an optional processing flow of a method for processing cell handover according to an embodiment of the present invention.
  • FIG. 7 is an optional schematic diagram of indicating the first information through the MAC subheader of the existing MAC PDU according to the embodiment of the present invention.
  • FIG. 8 is another optional schematic diagram of indicating the first information through the MAC subheader of the existing MAC PDU according to the embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a first MAC CE according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a processing flow of cell handover for a non-competitive random access process according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram 1 of a process flow of cell handover in a random access process for contention according to an embodiment of the present invention
  • FIG. 12 is a schematic diagram of a second MAC CE according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a third MAC CE according to an embodiment of the present invention.
  • FIG. 14 is a second schematic diagram of a process flow for cell handover in a random access process for contention according to an embodiment of the present invention.
  • 15 is a schematic diagram of the composition structure of a terminal device according to an embodiment of the present invention.
  • 16 is a schematic diagram of the composition structure of a network device according to an embodiment of the present invention.
  • FIG. 17 is a schematic diagram of the hardware composition structure of an electronic device according to an embodiment of the present invention.
  • 5G Enhance Mobile Broadband
  • URLLC Ultra Reliable Low Latency Communications
  • mMTC Massive Machine Type Communication
  • eMBB still aims for users to obtain multimedia content, services and data, and its demand is growing rapidly.
  • eMBB may be deployed in different scenarios, such as indoors, urban areas, rural areas, etc., its capabilities and requirements are also quite different, so it cannot be generalized and must be analyzed in detail in conjunction with specific deployment scenarios.
  • Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery), traffic safety protection, etc.
  • Typical features of mMTC include: high connection density, small data volume, delay-insensitive services, low-cost modules and long service life.
  • the New Rational (NR) system supports the handover process of connected terminal devices.
  • a terminal device that is using network services moves from one cell to another, or due to wireless transmission service load adjustment, activation operation and maintenance, equipment failure, etc., in order to ensure communication continuity and service quality, the system must The communication link between the terminal equipment and the original cell is transferred to the new cell, that is, the handover process is performed.
  • the cell handover process suitable for the LTE system and the NR system, as shown in Figure 1 is divided into the following three stages:
  • Phase 1 including steps 1 to 5
  • handover preparation including measurement control and reporting, handover request and confirmation
  • Phase 2 (including steps 6 to 8), handover execution: the terminal device immediately executes the handover process after receiving the handover command, that is, the terminal device disconnects the source cell and connects to the target cell (such as performing random access, sends an RRC handover complete message to Target network equipment, etc.); secondary node (Secondary Node, SN) state transfer, data forwarding.
  • the terminal device immediately executes the handover process after receiving the handover command, that is, the terminal device disconnects the source cell and connects to the target cell (such as performing random access, sends an RRC handover complete message to Target network equipment, etc.); secondary node (Secondary Node, SN) state transfer, data forwarding.
  • SN Secondary Node
  • Phase 3 (including steps 9 to 12), the handover is completed: the target cell and the (Acess and Mobility Management Function, AMF) and the user plane function (User Port Function, UPF) execute the path switch (Path Switch), and release the terminal of the source network device Device context.
  • AMF Access and Mobility Management Function
  • UPF User Port Function
  • Msg1 is an L1 message
  • Msg2 and Msg4 are L2 (Media Access Control (MAC) layer) messages
  • Msg3 is an L3 (RRC layer) ) Or L2 (MAC layer) message.
  • Msg1 and Msg2 do not use HARQ transmission
  • Msg3 and Msg4 use hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) transmission.
  • HARQ Hybrid Automatic Repeat reQuest
  • the schematic diagram of the non-competition-based random access process is shown in Fig. 3; where Msg0 and Msg1 are L1 messages, and Msg2 is L2 (MAC layer) messages.
  • the resources of the non-contention random access are obtained through RRC signaling or PDCCH sequence (order).
  • the terminal device can initiate the next random access attempt and perform power ramping until the maximum number of retransmissions allowed by the network device or T304 is reached. Timeout (during switching).
  • conditional handover The following is a brief description of conditional handover.
  • the terminal device and the source network device perform cell measurement, configuration, and reporting; the source network device and the target network device prepare for handover; when the terminal device meets the trigger condition, it switches to the target network device.
  • the handover (HO) command command
  • the handover (HO) command is configured in advance for the terminal device to avoid the problem that the handover preparation time is too long and the terminal device is too late to switch.
  • the running track of the terminal device is specific, so the source network device can allocate the target network device to the terminal device in advance, and the HO command includes the conditions used to trigger the terminal device to switch, when the configured When conditions are met, the terminal device initiates an access request to the target network device.
  • the following problems may exist in Conditional Handover:
  • the load condition of the target network device has been changed compared with the previous response to the handover request, for example, it has become overload.
  • the target network device is not sure whether the terminal device will switch to the cell corresponding to the target network device (that is, it is uncertain whether the terminal device will trigger the condition of the cell handover), so the priority of the resource reserved for the terminal device is compared with that of the service
  • the resource priority of terminal devices in other connection modes is low.
  • the source network device is configured with multiple target network devices for the terminal device, it is still possible for the terminal device to switch to a target network device with a lower load instead of the target network device.
  • the existing protocol does not support the rejection of the target network device's handover, which will cause the terminal device to continuously initiate random access attempts to the target network device, and eventually cause the cell handover to fail and increase the interruption time of the cell handover.
  • the present invention provides a method for processing cell handover.
  • the method for processing cell handover in the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, code Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) ) System, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability (Worldwide Interoperability) for Microwave Access, WiMAX) communication system or 5G system, etc.
  • 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
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • Worldwide Interoperability Worldwide Interoperability (Worldwide Interoperability
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 5.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • the "terminal equipment” used here includes but is not limited to connection via wired lines, such as via public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • PSTN public switched telephone networks
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL Digital Subscriber Line
  • DSL
  • a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 5 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 with a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the application.
  • An optional processing procedure of the cell handover processing method provided by the embodiment of the present invention, as shown in FIG. 6, includes the following steps:
  • Step S201 A terminal device receives first information sent by a network device, where the first information is used to characterize that the terminal device is denied access to the first target cell corresponding to the network device.
  • the terminal device receives a handover command for conditional handover sent by the source network device, and the handover command for conditional handover includes a dedicated target cell configuration.
  • RACH resource ie preamble.
  • the terminal device initiates a non-competition-based random access process to the target network device.
  • the target network device identifies the terminal device as a conditional handover terminal device through a dedicated preamble, and then determines whether to agree to the terminal device’s Random access request.
  • the target network device determines that the target network device is experiencing load congestion according to its own algorithm or strategy, it sends first information to the terminal device.
  • the first information is used to characterize the refusal of the terminal device to access the first corresponding target network device.
  • a target cell the target network device sends the first information through Msg2 in the random access process.
  • the target network device recognizes the C-RNTI of the terminal device through the dedicated preamble sent by the terminal device; when sending Msg2, it uses the physical Downlink Control Channel (PDCCH) scrambled by the C-RNTI to schedule the physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH), the PDSCH carries first information.
  • the PDSCH can carry the first information in at least the following implementation modes:
  • the first implementation manner is to indicate the first information through a MAC subheader (subheader) of a MAC protocol data unit (Protocol Data Unit, PDU).
  • the first bit of the MAC subheader is used to indicate the first information; when the value corresponding to the first bit is the first value, it indicates that the terminal device is denied access to the first target Community.
  • the MAC subheader may be a new MAC subheader, or it may reuse an existing MAC subheader.
  • Target cell Another optional schematic diagram of indicating the first information through the MAC subheader of the existing MAC PDU, as shown in FIG. 8, still taking the MAC subheader with Backoff indicator as an example, using the second reserved R bit to Indicate the first information, change the second R bit to Rej bit, and set the value of the second Rej bit to 1, indicating that the target network device refuses the terminal device
  • the second implementation manner is indicated by the first MAC control element (CE) of the MAC PDU.
  • the first MAC CE is a new RACH Rejection MAC CE, and a logical channel (Logic Channel, LC) identification (Identify, ID) for the first MAC CE is configured.
  • the schematic diagram of the first MAC CE uses the second bit (Rej bit) of the first MAC CE to indicate the first information, and the value corresponding to the second bit is the second value , Indicating that the terminal device is denied access to the first target cell. For example, setting the value of the Rej bit to 1, indicates that the target network device refuses the terminal device to access the first target cell corresponding to the network device.
  • the MAC PDU is carried in the PDSCH scheduled by the PDCCH scrambled by the C-RNTI.
  • the first information is indicated through the first downlink control signaling (Downlink Control Information, DCI).
  • DCI Downlink Control Information
  • the third bit of the first DCI is used to indicate the first information; when the value corresponding to the third bit is a third value, it indicates that the terminal device is denied access to the first information.
  • Target cell a new DCI bit can be introduced in the PDCCH scrambled by C-RNTI to indicate the first information; a new DCI format can be used to indicate the first information, or the existing uplink or downlink DCI format can be reused, The R bit is used to indicate the first information.
  • the terminal device when the network device refuses the terminal device to access the first target cell corresponding to the network device, the terminal device immediately terminates the random access process for the first target cell (such as canceling subsequent random access try).
  • the terminal device selects one of the target cells to access; otherwise, the terminal device returns to the source cell; when the terminal device returns to the source cell, if the source cell has a radio link If it fails, the terminal device triggers the RRC connection re-establishment process.
  • the cell handover processing flow diagram is shown in Figure 10.
  • the source network device sends the CHO command to the terminal device.
  • the terminal device sends Msg1 to the target network device.
  • the target network device sends Msg2 to the terminal device according to its own implementation algorithm, and the terminal device is denied access to the target cell corresponding to the target network device through Msg2.
  • the terminal device stops HO to the target cell, and tries to access the target cell corresponding to other CHO.
  • the terminal device receives the handover command for conditional handover sent by the source network device, and the handover command for conditional handover includes the common configuration of the target cell.
  • RACH resources that is, RACH resources broadcast by the target cell system message.
  • the terminal device initiates a contention-based random access process to the target network device, and the target network device identifies the terminal device as a conditional handover terminal device through the C-RNTI in Msg3 during the random access process , It is determined whether to agree to the random access request of the terminal device.
  • the target network device determines that the target network device is experiencing load congestion according to its own algorithm, it sends first information to the terminal device, and the first information is used to characterize that the terminal device is denied access to the first target corresponding to the target network device Community.
  • the target network device sends the first information through Msg4 in the random access process.
  • the target network device sends the first information through Msg4.
  • the PDSCH is scheduled through the PDCCH scrambled by the C-RNTI, and the PDSCH carries the first information.
  • the manner in which the PDSCH carries the first information is the same as the three manners of sending the first information shown in FIG. 7 to FIG. 9 in the aforementioned non-contention random access process, and will not be repeated here.
  • the target network device sends the first information through Msg4, except for the first implementation, the second implementation, and the third implementation.
  • Msg4 the first implementation, the second implementation, and the third implementation.
  • it also includes:
  • the first information is carried in the first RRC message.
  • the first RRC message may be a new RRC message, such as an RRC CHO Reject message.
  • the optional content of the RRC CHO Reject message is as follows:
  • the source network device sends a CHO command to the terminal device, when the CHO condition is met, the terminal device sends Msg1 to the target network device, After Msg2 and Msg3, the target network device finds the existing C-RNTI MAC CE and RRC reconfiguration complete message in Msg3, and recognizes the terminal device as a conditional handover terminal device through the C-RNTI, and then forwards it according to its own implementation algorithm.
  • the terminal device sends Msg4, and the terminal device is denied access to the target cell corresponding to the target network device through Msg4.
  • the terminal device stops HO to the target cell, and tries to access the target cell corresponding to other CHO.
  • the cell handover processing procedure further includes:
  • Step S202 The terminal device sends information about at least one second target cell to the network device, where the information about the at least one second target cell is used by the network device to select at least one second target cell for the terminal device Access.
  • the information of the at least one second target cell is indicated by the second MAC CE, or the information of the at least one second target cell is carried in the second RRC message.
  • the information of the second target cell includes at least: Physical Cell Identifier (PCI) and frequency; or, the information of the second target cell includes at least PCI, frequency, and number of the second target cell .
  • PCI Physical Cell Identifier
  • the second MAC CE may be a new CHO target MAC CE, as shown in FIG. 12, which includes the information of at least one second target cell.
  • the information of each second target cell includes PCI and frequency point.
  • the second RRC message may be an extended RRC Reconfiguration Complete message, and the RRC Reconfiguration Complete message includes at least one second target that meets the handover trigger condition Cell information; the optional content of the second RRC message is as follows.
  • the method further includes:
  • Step S203 The network device sends second information to the terminal device, where the second information is used to indicate at least one second target cell accessible by the terminal device.
  • the second information is indicated by a third MAC CE
  • the third MAC CE may be a new CHO redirection MAC CE
  • the third MAC CE has a corresponding LC ID .
  • the second information is also used to indicate the priority of the terminal device to access the at least one second target cell.
  • A represents the number of the target cell with the highest priority access
  • B represents the number of the target cell with the second priority access, and so on.
  • the number of the target cell can be obtained from the information of at least one second target cell reported by the network device; optionally, the number of the target cell can be displayed in the information of the at least one second target cell, or according to the reported
  • the sequence determines the number of the target cell.
  • the access priority of the target cell can be sorted according to the load information of the target cell. For example, the access priority of the target cell with a small load is higher; by setting the access priority of the target cell, the probability of successful conditional handover can be improved.
  • the second information is indicated by a second DCI.
  • at least one bit of the second DCI is used to indicate the number of at least one second target cell accessible by the terminal device.
  • the second DCI may be a newly introduced DCI bit in the PDCCH scrambled by the C-RNTI to indicate the target cell number of the CHO redirection.
  • the format of the second DCI may reuse the existing uplink DCI format or reuse the existing downlink DCI format, and the R bit is used to indicate the second information.
  • the second DCI may also use a new DCI format to indicate the second information.
  • the second information is carried in a third RRC message.
  • the third RRC message and the first RRC message may be the same or different.
  • the third RRC message or the first RRC message indicates both the first information and the second information; that is, the first RRC message or the third RRC message
  • the RRC message indicates that the terminal device is denied access to the first target cell corresponding to the target network device, and at the same time, second information is sent to the terminal device.
  • the second information is used to indicate at least one second target cell accessible by the terminal device. Target cell.
  • the second information includes the PCI and frequency list of at least one second target cell, or the number list of at least one second target cell, and the number of the at least one second target cell is reported from the terminal device to at least one of the network devices Obtained from the information of the second target cell.
  • the third RRC message may be a new RRC message, such as an RRC CHO Redirection message; optionally, the optional content of the RRC CHO Redirection message is as follows.
  • the cell handover processing flow diagram 2 is shown in Figure 14.
  • the source network device sends the CHO command to the terminal device.
  • the terminal device sends Msg1 to the target network device.
  • the target network device finds the existing C-RNTI MAC CE and RRC reconfiguration complete message in Msg3, and recognizes the terminal device as a conditional handover terminal device through the C-RNTI, and then forwards it according to its own implementation algorithm.
  • the terminal device sends Msg4, and the terminal device is denied access to the target cell corresponding to the target network device through Msg4.
  • the terminal device stops HO to the target cell, and according to the instructions in Msg4, initiates handover access to the target cell with the highest priority.
  • the target network device when the target network device's transmission load is congested, it can send the terminal device the information of denying access to the first target cell corresponding to the target network device, so that the terminal device stops the random access of the first target cell. Entry process; reduces the number and time of random access attempts by terminal equipment in congested cells, and reduces handover delay.
  • the terminal device can also select a second target cell for random access according to the information of at least one second target cell sent by the target network device, thereby realizing the redirection of conditional handover and improving the success rate of conditional handover.
  • an embodiment of the present invention provides a terminal device.
  • the composition structure of the terminal device 300 as shown in FIG. 15, includes:
  • the first receiving unit 301 is configured to receive first information sent by a network device, where the first information is used to characterize that the terminal device is denied access to the first target cell corresponding to the network device.
  • the first information is indicated by the MAC subheader subheader of the MAC PDU; wherein, the first bit of the MAC subheader is used to indicate the first information, and the value corresponding to the first bit When it is the first value, it indicates that the terminal device is denied access to the first target cell.
  • the first information is indicated by the first MAC CE of the MAC PDU; wherein, the second bit of the first MAC CE is used to indicate the first information, and the second bit When the corresponding value is the second value, it indicates that the terminal device is denied access to the first target cell.
  • the first information is indicated by a first DCI; wherein, the third bit of the first DCI is used to indicate the first information, and the value corresponding to the third bit is the first When the value is three, it indicates that the terminal device is denied access to the first target cell.
  • the first information is carried in a first radio resource control RRC message.
  • the MAC PDU is carried in the PDSCH scheduled by the PDCCH scrambled by the C-RNTI.
  • the first DCI is carried by the PDCCH scrambled by C-RNTI.
  • the terminal device 300 further includes:
  • the first sending unit 302 is configured to send information about at least one second target cell to the network device, where the information about the at least one second target cell is used by the network device to select at least one second target cell for the terminal Device access.
  • the information of the at least one second target cell is indicated by the second MAC CE.
  • the information of the at least one second target cell is carried in a second RRC message.
  • the information of the second target cell includes at least: PCI and frequency points.
  • the information of the second target cell includes the number of the second target cell in addition to the PCI and the frequency point.
  • the first receiving unit 301 is further configured to receive second information sent by the network device, where the second information is used to indicate at least one second target cell accessible by the terminal device.
  • the second information is indicated by a third MAC CE; optionally, the second information is also used to indicate the priority of the terminal device 300 to access the at least one second target cell.
  • the second information is indicated by a second DCI; optionally, at least one bit of the second DCI is used to indicate the information of at least one second target cell accessible by the terminal device Numbering.
  • the second information is carried in a third RRC message.
  • the terminal device 300 further includes:
  • the processing unit 303 is configured to select one of the at least one second target cell to redirect access to the target cell.
  • an embodiment of the present invention provides a network device.
  • the composition structure of the network device 400 includes:
  • the second sending unit 401 is configured to send first information to a terminal device, where the first information is used to characterize that the terminal device is denied access to the first target cell corresponding to the network device.
  • the first information is indicated by the MAC subheader subheader of the MAC PDU; wherein, the first bit of the MAC subheader is used to indicate the first information, and the value corresponding to the first bit When it is the first value, it indicates that the terminal device is denied access to the first target cell.
  • the first information is indicated by the first MAC CE of the MAC PDU; wherein, the second bit of the first MAC CE is used to indicate the first information, and the second bit When the corresponding value is the second value, it indicates that the terminal device is denied access to the first target cell.
  • the first information is indicated by a first DCI; wherein, the third bit of the first DCI is used to indicate the first information, and the value corresponding to the third bit is the first When the value is three, it indicates that the terminal device is denied access to the first target cell.
  • the first information is carried in a first radio resource control RRC message.
  • the MAC PDU is carried in the PDSCH scheduled by the PDCCH scrambled by the C-RNTI.
  • the first DCI is carried by the PDCCH scrambled by C-RNTI.
  • the network device further includes: a second receiving unit 402 configured to receive at least one second target cell information sent by the terminal device, and the at least one second target cell information is used in the network The device selects at least one second target cell for the terminal device to access.
  • the information of the at least one second target cell is indicated by a second MAC CE; or, the information of the at least one second target cell is carried in a second RRC message.
  • the information of the second target cell includes at least: PCI and frequency points.
  • the information of the second target cell includes the number of the second target cell in addition to the PCI and the frequency point.
  • the second sending unit 401 is further configured to send second information to the terminal device, where the second information is used to indicate at least one second target cell accessible by the terminal device.
  • the second information is indicated by a third MAC CE; optionally, the second information is also used to indicate the priority of the terminal device to access the at least one second target cell.
  • the second information is indicated by a second DCI; optionally, at least one bit of the second DCI is used to indicate the information of at least one second target cell accessible by the terminal device Numbering.
  • the second information is carried in a third RRC message.
  • An embodiment of the present invention also provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned terminal device when the computer program is running. Steps of the cell handover processing method.
  • An embodiment of the present invention also provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the above-mentioned network device when the computer program is running. Steps of the cell handover processing method.
  • FIG. 17 is a schematic diagram of the hardware composition structure of an electronic device (terminal device and target network device) according to an embodiment of the present invention.
  • the terminal device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704.
  • the various components in the terminal device 700 are coupled together through the bus system 705.
  • the bus system 705 is used to implement connection and communication between these components.
  • the bus system 705 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 705 in FIG. 17.
  • the memory 702 may be a volatile memory or a nonvolatile memory, and may also include both volatile and nonvolatile memory.
  • the non-volatile memory can be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and electrically erasable Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM (CD) -ROM, Compact Disc Read-Only Memory); Magnetic surface memory can be disk storage or tape storage.
  • the volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • SSRAM synchronous static random access memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM enhanced Type synchronous dynamic random access memory
  • SLDRAM SyncLink Dynamic Random Access Memory
  • direct memory bus random access memory DRRAM, Direct Rambus Random Access Memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • the memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the terminal device 700. Examples of these data include: any computer program used to operate on the terminal device 700, such as the application program 7022.
  • the program for implementing the method of the embodiment of the present invention may be included in the application program 7022.
  • the method disclosed in the foregoing embodiment of the present invention may be applied to the processor 701 or implemented by the processor 701.
  • the processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor 701 or instructions in the form of software.
  • the aforementioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the processor 701 may implement or execute various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 702.
  • the processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.
  • the terminal device 700 may be used by one or more application specific integrated circuits (ASIC, Application Specific Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), and complex programmable logic device (CPLD). , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the foregoing method.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable logic device
  • CPLD complex programmable logic device
  • FPGA field-programmable logic device
  • controller MCU
  • MPU MPU
  • the embodiment of the present application also provides a storage medium for storing computer programs.
  • the storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process in each method of the embodiment of the present application.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

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Abstract

本发明公开了一种小区切换的处理方法,包括:终端设备接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。本发明还公开了另一种小区切换的处理方法、设备及存储介质。

Description

一种小区切换的处理方法、设备及存储介质 技术领域
本发明涉及无线通信技术领域,尤其涉及一种小区切换的处理方法、设备及存储介质。
背景技术
相关技术中,针对基于条件的小区切换(conditional handover),终端设备接收到条件切换命令后,并不会立即执行小区切换;因此,目标网络设备需要较长的时间维护和管理响应给源网络设备的配置资源。当目标网络设备对应的目标小区发送过载时,目标网络设备可能会由于一些原因优先服务于目标小区内的其他终端设备,并决定取消预留给条件切换命令对应的终端设备的资源和配置。此时,如何针对终端设备发起的小区切进行处理,才能够降低切换时延、提高小区切换的成功率,目前尚无有效解决方案。
发明内容
为解决上述技术问题,本发明实施例提供一种小区切换的处理方法、设备及存储介质,在目标网络设备不允许基于条件切换的终端设备接入时,能够降低切换时延、提高小区切换的成功率。
第一方面,本发明实施例提供一种小区切换的处理方法,包括:终端设备接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
第二方面,本发明实施例提供一种小区切换的处理方法,包括:网络设备向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
第三方面,本发明实施例提供一种终端设备,所述终端设备包括:第一接收单元,配置为接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
第四方面,本发明实施例提供一种网络设备,所述网络设备包括:第二发送单元,配置为向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
第五方面,本发明实施例提供一种终端设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,所述处理器用于运行所述计算机程序时,执行上述终端设备执行的小区切换的处理方法的步骤。
第六方面,本发明实施例提供一种网络设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,所述处理器用于运行所述计算机程序时,执行上述网络设备执行的小区切换的处理方法的步骤。
第七方面,本发明实施例提供一种存储介质,存储有可执行程序,所述可执行程序被处理器执行时,实现上述终端设备执行的小区切换的处理方法。
第八方面,本发明实施例提供一种存储介质,存储有可执行程序,所述可执行程序被处理器执行时,实现上述网络设备执行的小区切换的处理方法。
本发明实施例提供的小区切换的处理方法,包括:终端设备接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。如此,使得网络设备由于一些原因优先服务于目标小区内的其他终端设备,并决定取消预留给条件切换命令对应的终端设备的资源和配置时,通过第一信息通知终端设备不能够接入所述网络设备对应的第一目标小区;实现了网络设备对条件切换配置资源的有效管理,减少了终端设备在小区拥塞下尝试切换接入的次数和时间,降低了切换时延,提高了小区切换的成功率。
附图说明
图1为本发明小区切换的流程示意图;
图2为本发明基于竞争的随机接入过程示意图;
图3为本发明基于非竞争的随机接入过程示意图;
图4为本发明基于条件切换的随机接入过程示意图;
图5为本发明实施例通信系统的组成结构示意图;
图6为本发明实施例小区切换的处理方法的可选处理流程示意图;
图7为本发明实施例通过已有的MAC PDU的MAC subheader指示第一信息的一个可选示意图;
图8为本发明实施例通过已有的MAC PDU的MAC subheader指示第一信息的另一个可选示意图;
图9为本发明实施例第一MAC CE的示意图;
图10为本发明实施例针对非竞争的随机接入过程,小区切换的处理流程示意图;
图11为本发明实施例针对竞争的随机接入过程,小区切换的处理流程示意图一;
图12为本发明实施例第二MAC CE的示意图;
图13为本发明实施例第三MAC CE的示意图;
图14为本发明实施例针对竞争的随机接入过程,小区切换的处理流程示意图二;
图15为本发明实施例终端设备的组成结构示意图;
图16为本发明实施例网络设备的组成结构示意图;
图17为本发明实施例电子设备的硬件组成结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点和技术内容,下面结合附图对本发明实施例的实现进行详细阐述,所附附图仅供参考说明之用,并非用来限定本发明实施例。
在对本发明实施例提供的小区切换的处理方法进行详细说明之前,先对相关技术小区切换过程及小区切换后的小区切换的处理方法进行简要说明。
当前,随着人们对速率、延迟、高速移动性、能效的追求以及未来生活中业务的多样性和复杂性,3GPP国际标准组织开始研发5G。5G的主要应用场景为:增强移动超宽带(Enhance Mobile Broadband,eMBB)、低时延高可靠通信(Ultra Reliable Low Latency Communications,URLLC)、和大规模机器类通信(Massive Machine Type Communication,mMTC)。
eMBB仍然以用户获得多媒体内容、服务和数据为目标,其需求增长十分迅速。另一方面,由于eMBB可能部署在不同的场景中,便如室内,市区,农村等,其能力和需求的差别也比较大,所以不能一概而论,必须结合具体的部署场景详细分析。URLLC的典型应用包括:工业自动化,电力自动化,远程医疗操作(手术),交通安全保障等。 mMTC的典型特点包括:高连接密度,小数据量,时延不敏感业务,模块的低成本和长使用寿命等。
与LTE系统相似,新无线(New Ration,NR)系统支持连接态终端设备的切换过程。当正在使用网络服务的终端设备从一个小区移动到另一个小区,或由于无线传输业务负荷量调整、激活操作维护、设备故障等原因,为了保证通信的连续性和服务的质量,系统要将该终端设备与原小区的通信链路转移到新的小区上,即执行切换过程。
以Xn接口切换过程为例,适用于LTE系统以及NR系统的小区切换过程,如图1所示,分为以下三个阶段:
阶段1(包括步骤1至5),切换准备:包括测量控制和汇报,切换请求以及确认
阶段2(包括步骤6至8),切换执行:终端设备在收到切换命令后立即执行切换过程,即终端设备断开源小区并与目标小区连接(如执行随机接入,发送RRC切换完成消息给目标网络设备等);辅节点(Secondary Node,SN)状态转移,数据转发。
阶段3(包括步骤9至12),切换完成:目标小区与(Acess and Mobility Management Function,AMF)和用户面功能(User Port Function,UPF)执行路径切换(Path Switch),释放源网络设备的终端设备上下文。
基于竞争的随机接入过程的示意图,如图2所示;其中,Msg1是L1消息,Msg2和Msg4是L2(媒体接入控制(Media Access Control,MAC)层)消息,Msg3是L3(RRC层)或L2(MAC层)消息。Msg1和Msg2不使用HARQ传输,而Msg3和Msg4使用混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)传输。一次随机接入尝试如果失败,终端设备可以发起下一次随机接入尝试并进行power ramping,直到达到网络侧允许的最大重传次数。因此随机接入成功的时间可长可短,取决于随机接入尝试的次数。切换过程中不同的是,终端设备在达到最大RACH重传次数后,并不终止后续的随机接入尝试,直到T304超时才宣告(declare)切换失败。
基于非竞争的随机接入过程的示意图,如图3所示;其中,Msg0和Msg1是L1消息,Msg2是L2(MAC层)消息。在非竞争随机接入过程中,通过RRC信令或者PDCCH序列(order)获取非竞争随机接入的资源。与基于竞争的随机接入过程类似,非竞争的随机接入失败后,终端设备可以发起下一次随机接入尝试并进行功率调整(power ramping),直到达到网络设备允许的最大重传次数或者T304超时(切换过程中)。
下面对conditional handover进行简要说明。
针对高速移动场景和高频部署场景存在频繁切换以及切换容易失败的问题,3GPP当前正在讨论为LTE和NR系统引入conditional handover。如图4所示,终端设备与源网络设备进行小区测量、配置和报告;源网络设备和目标网络设备进行切换准备;当终端设备满足触发条件切换到目标网络设备。Conditional handover中,通过为终端设备提前配置切换(Handover,HO)命令(command),避免了切换准备时间过长而导致的终端设备要切换的时候已经过晚的问题。并且,对于高铁场景,终端设备的运行轨迹是特定的,所以源网络设备可以提前把目标网络设备配给终端设备,并且在HO command中包含用于触发终端设备进行切换的条件,当满足所配的条件时,终端设备向目标网络设备发起接入请求。但是,在Conditional handover中可能存在如下问题:
1、目标网络设备的负荷情况相较之前响应切换请求时已经发送改变,例如已变为过载(overload)。
2、目标网络设备不确定终端设备是否会切换到目标网设备对应的小区(即不确定终端设备是否会触发到本小区切换的条件),因此预留给终端设备的资源优先级相比正在服务的其它连接模式的终端设备的资源优先级低。
3、如果源网络设备配置给终端设备多个目标网络设备,那么终端设备还是有可能 切换到一个负荷较低的目标网络设备,而非本目标网络设备不可。
但是,现有协议不支持目标网络设备进行切换拒绝,这将会导致终端设备不停的向该目标网络设备发起随机接入尝试,并最终导致小区切换失败,增加小区切换的中断时间。
基于上述问题,本发明提供一种小区切换的处理方法,本申请实施例的小区切换的处理方法可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access,WiMAX)通信系统或5G系统等。
示例性的,本申请实施例应用的通信系统100如图5所示。该通信系统100可以包括网络设备110,网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备进行通信。可选地,该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station,BTS),也可以是WCDMA系统中的基站(NodeB,NB),还可以是LTE系统中的演进型基站(Evolutional Node B,eNB或eNodeB),或者是云无线接入网络(Cloud Radio Access Network,CRAN)中的无线控制器,或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端设备120。作为在此使用的“终端设备”包括但不限于经由有线线路连接,如经由公共交换电话网络(Public Switched Telephone Networks,PSTN)、数字用户线路(Digital Subscriber Line,DSL)、数字电缆、直接电缆连接;和/或另一数据连接/网络;和/或经由无线接口,如,针对蜂窝网络、无线局域网(Wireless Local Area Network,WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器;和/或另一终端设备的被设置成接收/发送通信信号的装置;和/或物联网(Internet of Things,IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话;可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System,PCS)终端;可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System,GPS)接收器的PDA;以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端设备可以指接入终端、用户设备(User Equipment,UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的终端设备或者未来演进的PLMN中的终端设备等。
可选地,终端设备120之间可以进行终端直连(Device to Device,D2D)通信。
可选地,5G系统或5G网络还可以称为新无线(New Radio,NR)系统或NR网络。
图5示例性地示出了一个网络设备和两个终端设备,可选地,该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施例对此不作限定。
应理解,本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图5示出的通信系统100为例,通信设备可包括具有通信功能的网络设备110和终端设备120,网络设备110和终端设备120可以为上文所述的具体设备,此处不再赘述;通信设备还可包括通信系统100中的其他设备,例如网络控制器、移动管理实体等其他网络实体,本申请实施例中对此不做限定。
本发明实施例提供的小区切换的处理方法的一种可选处理流程,如图6所示,包括以下步骤:
步骤S201,终端设备接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
在一些实施例中,针对非竞争的随机接入过程,在执行步骤S201之前,终端设备接收源网络设备发送的用于conditional handover的切换命令,用于conditional handover的切换命令包括目标小区配置的专用RACH资源(即preamble)。当针对目标小区的切换条件触发时,终端设备向目标网络设备发起基于非竞争的随机接入过程,目标网络设备通过专用preamble识别出终端设备为conditional handover的终端设备,则确定是否同意终端设备的随机接入请求。当目标网络设备根据自身的算法或者策略确定目标网络设备发生负荷拥塞时,向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述目标网络设备对应的第一目标小区。可选地,目标网络设备通过随机接入过程中的Msg2发送第一信息。
在具体实施时,目标网络设备通过终端设备发送的专用preamble识别出终端设备的C-RNTI;在发送Msg2时,通过C-RNTI加扰的物理下行控制信道(Physical Downlink Control Channel,PDCCH)调度物理下行共享信道(Physical Downlink Shared Channel,PDSCH),所述PDSCH中承载第一信息。所述PDSCH至少可以通过如下几种实现方式承载第一信息:
第一种实现方式为:通过MAC协议数据单元(Protocol Data Unit,PDU)的MAC子报头(subheader)指示第一信息。可选地,所述MAC subheader的第一比特位用于指示所述第一信息;所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。所述MAC subheader可以是新的MAC subheader,也可以是重用已有的MAC subheader。通过已有的MAC PDU的MAC subheader指示第一信息的一个可选示意图,如图7所示,以MAC subheader with Backoff indicator为例,利用其中的第一个预留R比特位来指示所述第一信息,将第一个R bit变为Rej bit,并将第一个Rej bit的值设置为1,表示目标网络设备拒绝所述终端设备接入所述网络设备对应的第一目标小区。或者,通过已有的MAC PDU的MAC subheader指示第一信息的另一个可选示意图,如图8所示,仍以MAC subheader with Backoff indicator为例,利用其中的第二个预留R比特位来指示所述第一信息,将第二个R bit变为Rej bit,并将第二个Rej bit的值设置为1,表示目标网络设备拒绝所述终端设备接入所述网络设备对应的第一目标小区。
第二种实现方式,通过MAC PDU的第一MAC控制单元(Control Element,CE)指示。所述第一MAC CE是一个新的RACH Rejection MAC CE,并且配置单独针对所 述第一MAC CE的逻辑信道(Logic Channel,LC)标识(Identify,ID)。所述第一MAC CE的示意图,如图9所示,利用第一MAC CE的第二比特位(Rej bit)指示所述第一信息,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。举例来说,将该Rej bit的值设置为1,表示目标网络设备拒绝所述终端设备接入所述网络设备对应的第一目标小区。
在第一种实现方式和第二种实现方式中,所述MAC PDU携带于通过C-RNTI加扰的PDCCH调度的PDSCH中。
第三种实现方式,通过第一下行控制信令(Downlink Control Information,DCI)指示第一信息。可选地,所述第一DCI的第三比特位用于指示所述第一信息;所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。在具体实施时,可以通过C-RNTI加扰的PDCCH中引入新的DCI bit来指示第一信息;可以引用新的DCI格式来指示第一信息,也可以重用现有的上行或下行DCI格式,利用其中的R bit来指示第一信息。
针对非竞争的随机接入过程,当网络设备拒绝终端设备接入所述网络设备对应的第一目标小区时,终端设备立即终止针对第一目标小区的随机接入过程(如取消后续随机接入尝试)。可选地,当有其他目标小区满足切换条件时,终端设备选择其中一个目标小区进行接入;否则,终端设备回到源小区;当终端设备回到源小区时,如果源小区发生无线链路失败,终端设备触发RRC连接重建过程。
综上,针对非竞争的随机接入过程,小区切换的处理流程示意图,如图10所示,源网络设备向终端设备发送CHO命令,当CHO条件满足时,终端设备向目标网络设备发送Msg1,目标网络设备根据自身的实现算法向终端设备发送Msg2,通过Msg2拒绝终端设备接入目标网络设备对应的目标小区。终端设备停止HO至该目标小区,尝试接入其他CHO对应的目标小区。
在另一些实施例中,针对竞争的随机接入过程,在执行步骤S201之前,终端设备接收源网络设备发送的用于conditional handover的切换命令,用于conditional handover的切换命令包括目标小区配置的公共RACH资源(即目标小区系统消息广播的RACH资源)。当针对目标小区的切换条件触发时,终端设备向目标网络设备发起基于竞争的随机接入过程,目标网络设备通过随机接入过程中Msg3中的C-RNTI识别出终端设备为conditional handover的终端设备,则确定是否同意终端设备的随机接入请求。当目标网络设备根据自身的算法确定目标网络设备发生负荷拥塞时,向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述目标网络设备对应的第一目标小区。可选地,目标网络设备通过随机接入过程中的Msg4发送第一信息。
在具体实施时,目标网络设备通过Msg4发送第一信息。可选地,通过C-RNTI加扰的PDCCH调度PDSCH,所述PDSCH中承载第一信息。所述PDSCH承载第一信息的方式,与上述针对非竞争的随机接入过程中,图7至图9所示的发送第一信息的三种方式相同,这里不再赘述。
与针对非竞争的随机接入过程不同的是,针对竞争的随机接入过程中,目标网络设备通过Msg4发送第一信息的方式,除了上述第一种实现方式、第二种实现方式和第三种实现方式之外,还包括:
第四种实现方式,通过第一RRC消息携带第一信息。可选地,所述第一RRC消息可以为新的RRC消息,如RRC CHO Reject消息。所述RRC CHO Reject消息的可选内容如下所示:
Figure PCTCN2019078777-appb-000001
Figure PCTCN2019078777-appb-000002
综上,针对竞争的随机接入过程,小区切换的处理流程示意图一,如图11所示,源网络设备向终端设备发送CHO命令,当CHO条件满足时,终端设备向目标网络设备发送Msg1,经过Msg2和Msg3之后,目标网络设备在Msg3中发现现有的C-RNTI MAC CE和RRC重配置完成消息,并通过C-RNTI识别出终端设备为conditional handover的终端设备,根据自身的实现算法向终端设备发送Msg4,通过Msg4拒绝终端设备接入目标网络设备对应的目标小区。终端设备停止HO至该目标小区,尝试接入其他CHO对应的目标小区。
还有一些实施例中,在针对竞争的随机接入过程中,小区切换的处理流程,还包括:
步骤S202,所述终端设备向所述网络设备发送至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
在具体实施时,所述至少一个第二目标小区的信息通过第二MAC CE指示,或者所述至少一个第二目标小区的信息携带于第二RRC消息中。其中,所述第二目标小区的信息至少包括:物理小区标识(Physical Cell Identifier,PCI)和频点;或者,所述第二目标小区的信息至少包括PCI、频点和第二目标小区的编号。
终端设备通过第二MAC CE指示至少一个第二目标小区的信息时,所述第二MAC CE可以是新的CHO target MAC CE,如图12所示,其中包括至少一个第二目标小区的信息,每个第二目标小区的信息包括PCI和频点。
终端设备通过第二RRC消息指示至少一个第二目标小区的信息时,所述第二RRC消息可以是扩展的RRC Reconfiguration Complete消息,在RRC Reconfiguration Complete消息中包括满足切换触发条件的至少一个第二目标小区的信息;所述第二RRC消息的可选内容如下所示。
Figure PCTCN2019078777-appb-000003
Figure PCTCN2019078777-appb-000004
相应的,所述网络设备接收所述终端设备发送的至少一个第二目标小区的信息之后,所述方法还包括:
步骤S203,网络设备向所述终端设备发送第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
在一些实施例中,所述第二信息通过第三MAC CE指示,所述第三MAC CE可以是新的CHO重定向(redirection)MAC CE,并且,所述第三MAC CE具有对应的LC ID。可选地,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的 优先级。第三MAC CE的结构示意图,如图13所示,A表示最优先接入的目标小区的编号、B表示次优先接入的目标小区的编号,以此类推。其中,目标小区的编号可以通过网络设备上报的至少一个第二目标小区的信息中获取;可选地,所述至少一个第二目标小区的信息中可以显示的指示目标小区的编号,或者按照上报的顺序确定目标小区的编号。目标小区的接入优先级可根据目标小区的负荷信息进行排序,如负荷小的目标小区的接入优先级高;通过目标小区的接入优先级的设置,能够提高条件切换成功的概率。
在另一些实施例中,所述第二信息通过第二DCI指示。可选地,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。其中,所述第二DCI可以是通过C-RNTI加扰的PDCCH中新引入的DCI比特位来指示CHO redirection的目标小区编号。所述第二DCI的格式,可以重用已有的上行DCI格式或者重用已有的下行DCI格式,利用其中的R bit来指示第二信息。当然,第二DCI也可以采用新的DCI格式来指示第二信息。
在又一些实施例中,所述第二信息携带于第三RRC消息中。所述第三RRC消息与第一RRC消息可以是同一个,也可以是不同的。当所述第三RRC消息与所述第一RRC消息是同一个时,所述第三RRC消息或所述第一RRC消息同时指示第一信息和第二信息;即第一RRC消息或第三RRC消息指示拒绝终端设备接入目标网络设备对应的第一目标小区,同时,向所述终端设备发送第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。所述第二信息包括至少一个第二目标小区的PCI和频点列表,或者至少一个第二目标小区的编号列表,所述至少一个第二目标小区的编号从终端设备上报至网络设备的至少一个第二目标小区的信息中获取。所述第三RRC消息可以是一个新的RRC消息,如RRC CHO Redirection消息;可选地,RRC CHO Redirection消息的可选内容如下所示。
Figure PCTCN2019078777-appb-000005
综上,针对竞争的随机接入过程,小区切换的处理流程示意图二,如图14所示,源网络设备向终端设备发送CHO命令,当CHO条件满足时,终端设备向目标网络设 备发送Msg1,经过Msg2和Msg3之后,目标网络设备在Msg3中发现现有的C-RNTI MAC CE和RRC重配置完成消息,并通过C-RNTI识别出终端设备为conditional handover的终端设备,根据自身的实现算法向终端设备发送Msg4,通过Msg4拒绝终端设备接入目标网络设备对应的目标小区。终端设备停止HO至该目标小区,并根据Msg4中的指示,向优先级最高的目标小区发起切换接入。
本发明上述小区切换的处理流程中,当目标网络设备发送负荷拥塞时,能够向终端设备发送拒绝接入目标网络设备对应的第一目标小区的信息,使得终端设备停止第一目标小区的随机接入过程;减小了终端设备在拥塞小区下尝试随机接入的次数和时间,降低了切换时延。可选地,终端设备还能够根据目标网络设备发送的至少一个第二目标小区的信息,选择一个第二目标小区进行随机接入,实现了条件切换的重定向,提高了条件切换的成功率。
为实现上述小区切换的处理方法,本发明实施例提供一种终端设备,所述终端设备300的组成结构,如图15所示,包括:
第一接收单元301,配置为接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
在一些实施例中,所述第一信息通过MAC PDU的MAC子报头subheader指示;其中,所述MAC subheader的第一比特位用于指示所述第一信息,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
在另一些实施例中,所述第一信息通过MAC PDU的第一MAC CE指示;其中,所述第一MAC CE的第二比特位用于指示所述第一信息,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
在又一些实施例中,所述第一信息通过第一DCI指示;其中,所述第一DCI的第三比特位用于指示所述第一信息,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
再一些实施例中,所述第一信息携带于第一无线资源控制RRC消息中。
上述方案中,所述MAC PDU携带于通过C-RNTI加扰的PDCCH调度的PDSCH中。
上述方案中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
上述方案中,所述终端设备300还包括:
第一发送单元302,配置为向所述网络设备发送至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
在一些实施例中,所述至少一个第二目标小区的信息通过第二MAC CE指示。
在另一些实施例中,所述至少一个第二目标小区的信息携带于第二RRC消息中。
上述方案中,所述第二目标小区的信息至少包括:PCI和频点。
可选地,所述第二目标小区的信息除了包括:PCI和频点以外,还包括第二目标小区的编号。
上述方案中,所述第一接收单元301,还配置为接收所述网络设备发送的第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
在一些实施例中,所述第二信息通过第三MAC CE指示;可选地,所述第二信息还用于指示所述终端设备300接入所述至少一个第二目标小区的优先级。
在另一些实施例中,所述第二信息通过第二DCI指示;可选地,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
在又一些实施例中,所述第二信息携带于第三RRC消息中。
上述方案中,所述终端设备300还包括:
处理单元303,配置为在所述至少一个第二目标小区中选择一个重定向目标小区接入。
为实现上述小区切换的处理方法,本发明实施例提供一种网络设备,所述网络设备400的组成结构,如图16所示,包括:
第二发送单元401,配置为向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
在一些实施例中,所述第一信息通过MAC PDU的MAC子报头subheader指示;其中,所述MAC subheader的第一比特位用于指示所述第一信息,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
在另一些实施例中,所述第一信息通过MAC PDU的第一MAC CE指示;其中,所述第一MAC CE的第二比特位用于指示所述第一信息,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
在又一些实施例中,所述第一信息通过第一DCI指示;其中,所述第一DCI的第三比特位用于指示所述第一信息,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
再一些实施例中,所述第一信息携带于第一无线资源控制RRC消息中。
上述方案中,所述MAC PDU携带于通过C-RNTI加扰的PDCCH调度的PDSCH中。
上述方案中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
上述方案中,所述网络设备还包括:第二接收单元402,配置为接收所述终端设备发送的至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
其中,所述至少一个第二目标小区的信息通过第二MAC CE指示;或者,所述至少一个第二目标小区的信息携带于第二RRC消息中。
上述方案中,所述第二目标小区的信息至少包括:PCI和频点。
可选地,所述第二目标小区的信息除了包括:PCI和频点以外,还包括第二目标小区的编号。
上述方案中,所述第二发送单元401,还配置为向所述终端设备发送第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
在一些实施例中,所述第二信息通过第三MAC CE指示;可选地,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的优先级。
在另一些实施例中,所述第二信息通过第二DCI指示;可选地,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
再一些实施例中,所述第二信息携带于第三RRC消息中。
本发明实施例还提供一种终端设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,所述处理器用于运行所述计算机程序时,执行上述终端设备执行的小区切换的处理方法的步骤。
本发明实施例还提供一种网络设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,所述处理器用于运行所述计算机程序时,执行上述网络设备执行的小区切换的处理方法的步骤。
图17是本发明实施例的电子设备(终端设备和目标网络设备)的硬件组成结构示意图,终端设备700包括:至少一个处理器701、存储器702和至少一个网络接口704。终端设备700中的各个组件通过总线系统705耦合在一起。可理解,总线系统705用于 实现这些组件之间的连接通信。总线系统705除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图17中将各种总线都标为总线系统705。
可以理解,存储器702可以是易失性存储器或非易失性存储器,也可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是ROM、可编程只读存储器(PROM,Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM,Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM,Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM,ferromagnetic random access memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM,Compact Disc Read-Only Memory);磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM,Random Access Memory),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(SRAM,Static Random Access Memory)、同步静态随机存取存储器(SSRAM,Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM,Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM,Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器(DDRSDRAM,Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM,Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM,SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM,Direct Rambus Random Access Memory)。本发明实施例描述的存储器702旨在包括但不限于这些和任意其它适合类型的存储器。
本发明实施例中的存储器702用于存储各种类型的数据以支持终端设备700的操作。这些数据的示例包括:用于在终端设备700上操作的任何计算机程序,如应用程序7022。实现本发明实施例方法的程序可以包含在应用程序7022中。
上述本发明实施例揭示的方法可以应用于处理器701中,或者由处理器701实现。处理器701可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器701中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器701可以是通用处理器、数字信号处理器(DSP,Digital Signal Processor),或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器701可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤,可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于存储介质中,该存储介质位于存储器702,处理器701读取存储器702中的信息,结合其硬件完成前述方法的步骤。
在示例性实施例中,终端设备700可以被一个或多个应用专用集成电路(ASIC,Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD,Programmable Logic Device)、复杂可编程逻辑器件(CPLD,Complex Programmable Logic Device)、FPGA、通用处理器、控制器、MCU、MPU、或其他电子元件实现,用于执行前述方法。
本申请实施例还提供了一种存储介质,用于存储计算机程序。
可选的,该存储介质可应用于本申请实施例中的终端设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中的相应流程,为了简洁,在此不再赘述。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一 流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。

Claims (102)

  1. 一种小区切换的处理方法,所述方法包括:
    终端设备接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
  2. 根据权利要求1所述的方法,其中,所述第一信息通过媒体接入控制协议数据单元MAC PDU的MAC子报头subheader指示。
  3. 根据权利要求2所述的方法,其中,所述MAC subheader的第一比特位用于指示所述第一信息。
  4. 根据权利要求3所述的方法,其中,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
  5. 根据权利要求1所述的方法,其中,所述第一信息通过MAC PDU的第一MAC控制单元CE指示。
  6. 根据权利要求5所述的方法,其中,所述第一MAC CE的第二比特位用于指示所述第一信息。
  7. 根据权利要求6所述的方法,其中,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
  8. 根据权利要求2至7任一项所述的方法,其中,所述MAC PDU携带于通过小区无线网络临时标识C-RNTI加扰的物理下行控制信道PDCCH调度的物理下行共享信道PDSCH中。
  9. 根据权利要求1所述的方法,其中,所述第一信息通过第一下行控制信令DCI指示。
  10. 根据权利要求9所述的方法,其中,所述第一DCI的第三比特位用于指示所述第一信息。
  11. 根据权利要求10所述的方法,其中,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
  12. 根据权利要求9至11任一项所述的方法,其中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
  13. 根据权利要求1所述的方法,其中,所述第一信息携带于第一无线资源控制RRC消息中。
  14. 根据权利要求1至13任一项所述的方法,其中,所述方法还包括:
    所述终端设备向所述网络设备发送至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
  15. 根据权利要求14所述的方法,其中,所述至少一个第二目标小区的信息通过第二MAC CE指示。
  16. 根据权利要求14所述的方法,其中,所述至少一个第二目标小区的信息携带于第二无线资源控制RRC消息中。
  17. 根据权利要求14至16任一项所述的方法,其中,所述第二目标小区的信息至少包括:
    物理小区标识PCI和频点。
  18. 根据权利要求17所述的方法,其中,所述第二目标小区的信息还包括:
    第二目标小区的编号。
  19. 根据权利要求14至18任一项所述的方法,其中,所述方法还包括:
    所述终端设备接收所述网络设备发送的第二信息,所述第二信息用于指示所述终端 设备可接入的至少一个第二目标小区。
  20. 根据权利要求19所述的方法,其中,所述第二信息通过第三MAC CE指示。
  21. 根据权利要求20所述的方法,其中,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的优先级。
  22. 根据权利要求19所述的方法,其中,所述第二信息通过第二DCI指示。
  23. 根据权利要求22所述的方法,其中,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
  24. 根据权利要求19所述的方法,其中,所述第二信息携带于第三RRC消息中。
  25. 根据权利要求19至24任一项所述的方法,其中,所述方法还包括:
    所述终端设备在所述至少一个第二目标小区中选择一个重定向目标小区接入。
  26. 一种小区切换的处理方法,所述方法包括:
    网络设备向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
  27. 根据权利要求26所述的方法,其中,所述第一信息通过媒体接入控制协议数据单元MAC PDU的MAC子报头subheader指示。
  28. 根据权利要求27所述的方法,其中,所述MAC subheader的第一比特位用于指示所述第一信息。
  29. 根据权利要求28所述的方法,其中,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
  30. 根据权利要求26所述的方法,其中,所述第一信息通过MAC PDU的第一MAC控制单元CE指示。
  31. 根据权利要求30所述的方法,其中,所述第一MAC CE的第二比特位用于指示所述第一信息。
  32. 根据权利要求31所述的方法,其中,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
  33. 根据权利要求27至32任一项所述的方法,其中,所述MAC PDU携带于通过小区无线网络临时标识C-RNTI加扰的物理下行控制信道PDCCH调度的物理下行共享信道PDSCH中。
  34. 根据权利要求26所述的方法,其中,所述第一信息通过第一下行控制信令DCI指示。
  35. 根据权利要求34所述的方法,其中,所述第一DCI的第三比特位用于指示所述第一信息。
  36. 根据权利要求35所述的方法,其中,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
  37. 根据权利要求34至36任一项所述的方法,其中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
  38. 根据权利要求26所述的方法,其中,所述第一信息携带于第一无线资源控制RRC消息中。
  39. 根据权利要求26至38任一项所述的方法,其中,所述方法还包括:
    所述网络设备接收所述终端设备发送的至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
  40. 根据权利要求39所述的方法,其中,所述至少一个第二目标小区的信息通过第二MAC CE指示。
  41. 根据权利要求39所述的方法,其中,所述至少一个第二目标小区的信息携带于第二无线资源控制RRC消息中。
  42. 根据权利要求39至41任一项所述的方法,其中,所述第二目标小区的信息至少包括:
    物理小区标识PCI和频点。
  43. 根据权利要求42所述的方法,其中,所述第二目标小区的信息还包括:
    第二目标小区的编号。
  44. 根据权利要求39至43任一项所述的方法,其中,所述方法还包括:
    所述网络设备向所述终端设备发送第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
  45. 根据权利要求44所述的方法,其中,所述第二信息通过第三MAC CE指示。
  46. 根据权利要求45所述的方法,其中,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的优先级。
  47. 根据权利要求44所述的方法,其中,所述第二信息通过第二DCI指示。
  48. 根据权利要求47所述的方法,其中,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
  49. 根据权利要求44所述的方法,其中,所述第二信息携带于第三RRC消息中。
  50. 一种终端设备,所述终端设备包括:
    第一接收单元,配置为接收网络设备发送的第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
  51. 根据权利要求50所述的终端设备,其中,所述第一信息通过媒体接入控制协议数据单元MAC PDU的MAC子报头subheader指示。
  52. 根据权利要求51所述的终端设备,其中,所述MAC subheader的第一比特位用于指示所述第一信息。
  53. 根据权利要求52所述的终端设备,其中,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
  54. 根据权利要求50所述的终端设备,其中,所述第一信息通过MAC PDU的第一MAC控制单元CE指示。
  55. 根据权利要求54所述的终端设备,其中,所述第一MAC CE的第二比特位用于指示所述第一信息。
  56. 根据权利要求55所述的终端设备,其中,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
  57. 根据权利要求51至56任一项所述的终端设备,其中,所述MAC PDU携带于通过小区无线网络临时标识C-RNTI加扰的物理下行控制信道PDCCH调度的物理下行共享信道PDSCH中。
  58. 根据权利要求50所述的终端设备,其中,所述第一信息通过第一下行控制信令DCI指示。
  59. 根据权利要求58所述的终端设备,其中,所述第一DCI的第三比特位用于指示所述第一信息。
  60. 根据权利要求59所述的终端设备,其中,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
  61. 根据权利要去58至60任一项所述的终端设备,其中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
  62. 根据权利要求50所述的终端设备,其中,所述第一信息携带于第一无线资源 控制RRC消息中。
  63. 根据权利要求50至62任一项所述的终端设备,其中,所述终端设备还包括:第一发送单元,配置为向所述网络设备发送至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
  64. 根据权利要求63所述的终端设备,其中,所述至少一个第二目标小区的信息通过第二MAC CE指示。
  65. 根据权利要求63所述的终端设备,其中,所述至少一个第二目标小区的信息携带于第二无线资源控制RRC消息中。
  66. 根据权利要求63至65任一项所述的终端设备,其中,所述第二目标小区的信息至少包括:
    物理小区标识PCI和频点。
  67. 根据权利要求66所述的终端设备,其中,所述第二目标小区的信息还包括:
    第二目标小区的编号。
  68. 根据权利要求63至67任一项所述的终端设备,其中,所述第一接收单元,还配置为接收所述网络设备发送的第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
  69. 根据权利要求68所述的终端设备,其中,所述第二信息通过第三MAC CE指示。
  70. 根据权利要求69所述的终端设备,其中,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的优先级。
  71. 根据权利要求68所述的终端设备,其中,所述第二信息通过第二DCI指示。
  72. 根据权利要求71所述的终端设备,其中,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
  73. 根据权利要求68所述的终端设备,其中,所述第二信息携带于第三RRC消息中。
  74. 根据权利要求68至73任一项所述的终端设备,其中,所述终端设备还包括:
    处理单元,配置为在所述至少一个第二目标小区中选择一个重定向目标小区接入。
  75. 一种网络设备,所述网络设备包括:
    第二发送单元,配置为向终端设备发送第一信息,所述第一信息用于表征拒绝所述终端设备接入所述网络设备对应的第一目标小区。
  76. 根据权利要求75所述的网络设备,其中,所述第一信息通过媒体接入控制协议数据单元MAC PDU的MAC子报头subheader指示。
  77. 根据权利要求76所述的网络设备,其中,所述MAC subheader的第一比特位用于指示所述第一信息。
  78. 根据权利要求77所述的网络设备,其中,所述第一比特位对应的值为第一值时,表征拒绝所述终端设备接入所述第一目标小区。
  79. 根据权利要求75所述的网络设备,其中,所述第一信息通过MAC PDU的第一MAC控制单元CE指示。
  80. 根据权利要求79所述的网络设备,其中,所述第一MAC CE的第二比特位用于指示所述第一信息。
  81. 根据权利要求80所述的网络设备,其中,所述第二比特位对应的值为第二值时,指示拒绝所述终端设备接入所述第一目标小区。
  82. 根据权利要求76至81任一项所述的网络设备,其中,所述MAC PDU携带于 通过小区无线网络临时标识C-RNTI加扰的物理下行控制信道PDCCH调度的物理下行共享信道PDSCH中。
  83. 根据权利要求75所述的网络设备,其中,所述第一信息通过第一下行控制信令DCI指示。
  84. 根据权利要求83所述的网络设备,其中,所述第一DCI的第三比特位用于指示所述第一信息。
  85. 根据权利要求84所述的网络设备,其中,所述第三比特位对应的值为第三值时,指示拒绝所述终端设备接入所述第一目标小区。
  86. 根据权利要求83至85任一项所述的网络设备,其中,所述第一DCI通过C-RNTI加扰的PDCCH承载。
  87. 根据权利要求75所述的网络设备,其中,所述第一信息携带于第一无线资源控制RRC消息中。
  88. 根据权利要求75至87任一项所述的网络设备,其中,所述网络设备还包括:
    第二接收单元,配置为接收所述终端设备发送的至少一个第二目标小区的信息,所述至少一个第二目标小区的信息用于所述网络设备选择至少一个第二目标小区供所述终端设备接入。
  89. 根据权利要求88所述的网络设备,其中,所述至少一个第二目标小区的信息通过第二MAC CE指示。
  90. 根据权利要求88所述的网络设备,其中,所述至少一个第二目标小区的信息携带于第二无线资源控制RRC消息中。
  91. 根据权利要求88至90任一项所述的网络设备,其中,所述第二目标小区的信息至少包括:
    物理小区标识PCI和频点。
  92. 根据权利要求91所述的网络设备,其中,所述第二目标小区的信息还包括:
    第二目标小区的编号。
  93. 根据权利要求88至92任一项所述的网络设备,其中,所述第二发送单元,还配置为向所述终端设备发送第二信息,所述第二信息用于指示所述终端设备可接入的至少一个第二目标小区。
  94. 根据权利要求93所述的网络设备,其中,所述第二信息通过第三MAC CE指示。
  95. 根据权利要求94所述的网络设备,其中,所述第二信息还用于指示所述终端设备接入所述至少一个第二目标小区的优先级。
  96. 根据权利要求93所述的网络设备,其中,所述第二信息通过第二DCI指示。
  97. 根据权利要求96所述的网络设备,其中,所述第二DCI的至少一个比特位用于指示所述终端设备可接入的至少一个第二目标小区的编号。
  98. 根据权利要求93所述的网络设备,其中,所述第二信息携带于第三RRC消息中。
  99. 一种终端设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,
    所述处理器用于运行所述计算机程序时,执行权利要求1至25任一项所述的小区切换的处理方法的步骤。
  100. 一种网络设备,包括处理器和用于存储能够在处理器上运行的计算机程序的存储器,其中,
    所述处理器用于运行所述计算机程序时,执行权利要求26至49任一项所述的小区 切换的处理方法的步骤。
  101. 一种存储介质,存储有可执行程序,所述可执行程序被处理器执行时,实现权利要求1至25任一项所述的小区切换的处理方法。
  102. 一种存储介质,存储有可执行程序,所述可执行程序被处理器执行时,实现权利要求26至49任一项所述的小区切换的处理方法。
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