WO2021013219A1 - 一种通信方法、终端设备及计算机可读存储介质 - Google Patents

一种通信方法、终端设备及计算机可读存储介质 Download PDF

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Publication number
WO2021013219A1
WO2021013219A1 PCT/CN2020/103804 CN2020103804W WO2021013219A1 WO 2021013219 A1 WO2021013219 A1 WO 2021013219A1 CN 2020103804 W CN2020103804 W CN 2020103804W WO 2021013219 A1 WO2021013219 A1 WO 2021013219A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
cell
network device
connection
signal quality
Prior art date
Application number
PCT/CN2020/103804
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English (en)
French (fr)
Inventor
耿婷婷
严乐
张宏平
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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20844491.9A priority Critical patent/EP3993557A4/en
Publication of WO2021013219A1 publication Critical patent/WO2021013219A1/zh
Priority to US17/581,291 priority patent/US20220150789A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305—Handover due to radio link failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink

Definitions

  • the present invention relates to the field of communication technology, and in particular to a communication method, terminal equipment and computer-readable storage medium.
  • a user equipment user equipment, UE
  • UE user equipment
  • two serving base stations one is a primary base station and the other is a secondary base station.
  • the secondary base station fails to connect
  • the UE remains in the connected state, and the UE can report the connection failure information of the secondary base station through the primary base station.
  • the primary base station fails to connect, the UE can only trigger the re-establishment process. From the time the UE detects the failure of the primary base station connection to when the UE completes the re-establishment procedure, the UE cannot perform service transmission.
  • the introduction of the recovery process of the main base station may lengthen the time of terminal data interruption.
  • the embodiments of the present application provide a communication method, a terminal device, and a computer-readable storage medium, which can reduce the data interruption duration of the terminal device in response to a connection failure of the primary base station of the terminal device.
  • an embodiment of the present application provides a communication method applied to a terminal device.
  • the method includes: the terminal device determines that the connection between the terminal device and a first cell fails, and the first cell is a first network device. Of the cell.
  • the terminal device determines the signal quality of the second cell under the second network device, and both the first network device and the second network device provide communication services for the terminal device. If the signal quality of the second cell is greater than or equal to the first preset threshold, the terminal device executes the connection recovery process between the terminal device and the first cell through the second cell.
  • the terminal device when the terminal device detects that the MCG connection fails, the terminal device chooses whether to perform the MCG fast recovery process based on the measurement quality of the SCG, so as to avoid the terminal device directly executing the MCG fast recovery process after the MCG connection fails.
  • the switch parameter configuration In unreasonable scenarios, the service interruption duration of the UE may be exacerbated.
  • the most suitable recovery mechanism can be selected, which can reduce the data interruption duration of the terminal device.
  • the above method further includes: if the signal quality of the second cell is less than the first preset threshold, the terminal device performs cell selection.
  • the terminal device when the terminal device detects that the MCG connection fails, the terminal device chooses based on the measurement quality of the SCG whether to perform the MCG quick recovery process or the cell selection process to select the most appropriate recovery mechanism, and the most appropriate recovery can be selected The mechanism can reduce the data interruption time of the terminal device.
  • the method further includes: the terminal device executes all operations through the third cell.
  • the implementation of the embodiment of the present application uses the third cell in the original SCG to continue to perform the rapid recovery process of the MCG, which can reduce the data interruption time of the terminal device.
  • the method further includes: the terminal device reports to the fourth cell to which the fourth cell belongs The third network device sends a re-establishment request.
  • the determination by the terminal device that the connection between the terminal device and the first cell fails includes: the terminal device determines that the time when the connection between the terminal device and the first cell fails is first Time; the terminal device determining the signal quality of the second cell under the second network device includes: if the time period between the time when the terminal device successfully switches to the first network device and the first time is greater than or Equal to the second preset threshold, the terminal device determines the signal quality of the second cell under the second network device.
  • the method before the terminal device determines that the connection between the terminal device and the first cell fails, the method further includes:
  • the terminal device is switched from the fourth network device to the first network device and the second network device according to the first message.
  • an embodiment of the present application provides a communication method applied to a terminal device.
  • the method includes: the terminal device determines that the connection between the terminal device and a first cell fails, and the first cell is a first network device. The cell; the terminal device determines the signal quality of the second cell under the second network device, the first network device and the second network device both provide communication services for the terminal device; if the second cell If the signal quality is less than the first preset threshold, the terminal device performs cell selection.
  • the terminal device when the terminal device detects that the MCG connection fails, the terminal device chooses whether to perform cell selection based on the measurement quality of the SCG.
  • the embodiment of this application can select the most appropriate recovery mechanism, which can reduce the data interruption duration of the terminal device .
  • the method further includes: the terminal device executes all operations through the third cell.
  • the implementation of the embodiment of the present application uses the third cell in the original SCG to continue to perform the rapid recovery process of the MCG, which can reduce the data interruption time of the terminal device.
  • the method further includes: the terminal device reports to the fourth cell to which the fourth cell belongs The third network device sends a re-establishment request.
  • the determination by the terminal device that the connection between the terminal device and the first cell fails includes: the terminal device determines that the time when the connection between the terminal device and the first cell fails is first Time; the terminal device determines the signal quality of the second cell under the second network device, specifically: if the terminal device successfully switches to the first network device and the time between the first time is less than The second preset threshold, the terminal device determines the signal quality of the second cell under the second network device.
  • the determination by the terminal device that the connection between the terminal device and the first cell fails includes: the terminal device determines that the time when the connection between the terminal device and the first cell fails is first Moment; the terminal device determines the signal quality of the second cell under the second network device, specifically: if the terminal device has not successfully handed over to the first network device at the first moment, the terminal The device determines the signal quality of the second cell under the second network device.
  • the method before the terminal device determines that the connection between the terminal device and the first cell fails, the method further includes:
  • the terminal device is switched from the fourth network device to the first network device and the second network device according to the first message.
  • the embodiments of the present invention provide a terminal device.
  • the terminal device may also be a device in the terminal device, or a device that can be used in matching with the terminal device.
  • the terminal device may include a module that performs one-to-one correspondence of the method/operation/step/action described in the first aspect.
  • the module may be a hardware circuit, software, or a combination of hardware circuit and software.
  • the terminal device may include a first determining unit, a second determining unit, and a first restoring unit.
  • a first determining unit configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • a second determining unit configured to determine the signal quality of a second cell under a second network device, and both the first network device and the second network device provide communication services for the terminal device;
  • the first recovery unit is configured to perform a connection recovery process between the terminal device and the first cell through the second cell if the signal quality of the second cell is greater than or equal to a first preset threshold.
  • the terminal device further includes:
  • the selection unit is configured to perform cell selection if the signal quality of the second cell is less than the first preset threshold.
  • the terminal device further includes:
  • the second recovery unit is configured to perform a connection recovery process between the terminal device and the first cell through the third cell.
  • the terminal device further includes:
  • the sending unit is configured to send a re-establishment request to the third network device to which the fourth cell belongs.
  • the first determining unit is specifically configured to determine that the time when the connection between the terminal device and the first cell fails is the first time
  • the second determining unit is specifically configured to determine the first network device if the time period between the time when the terminal device successfully switches to the first network device and the first time is greater than or equal to a second preset threshold. 2. The signal quality of the second cell under the network device.
  • an embodiment of the present invention provides a terminal device.
  • the terminal device may also be a device in the terminal device, or a device that can be matched and used with the terminal device.
  • the terminal device may include a one-to-one corresponding module for executing the method/operation/step/action described in the second aspect.
  • the module may be a hardware circuit, software, or a combination of hardware circuit and software.
  • the terminal device may include a first determining unit, a second determining unit, and a selecting unit.
  • a first determining unit configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • a second determining unit configured to determine the signal quality of a second cell under a second network device, and both the first network device and the second network device provide communication services for the terminal device;
  • the selection unit is configured to perform cell selection if the signal quality of the second cell is less than the first preset threshold.
  • the terminal device further includes:
  • the restoration unit is configured to perform a connection restoration process between the terminal device and the first cell through the third cell.
  • the terminal device further includes:
  • the sending unit is configured to send a re-establishment request to the third network device to which the fourth cell belongs.
  • the first determining unit is specifically configured to determine that the time when the connection between the terminal device and the first cell fails is the first time
  • the second determining unit is specifically configured to determine the second network device if the time length between the moment when the terminal device successfully switches to the first network device and the first moment is less than a second preset threshold The signal quality of the second cell below.
  • the first determining unit is specifically configured to determine that the time when the connection between the terminal device and the first cell fails is the first time
  • the second determining unit is specifically configured to determine the signal quality of the second cell under the second network device if the terminal device has not successfully handed over to the first network device at the first moment.
  • an embodiment of the present invention provides a terminal device.
  • the terminal device includes a processor for implementing the method described in the first aspect.
  • the terminal device may also include a memory for storing instructions and data.
  • the memory is coupled or integrated with the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented.
  • the terminal device may also include a communication interface, which is used for the terminal device to communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. It can be a network device.
  • the terminal device includes:
  • Memory used to store program instructions
  • a processor configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • the processor is further configured to determine the signal quality of a second cell under a second network device, where both the first network device and the second network device provide communication services for the terminal device;
  • the processor is further configured to, if the signal quality of the second cell is greater than or equal to a first preset threshold, execute a connection recovery process between the terminal device and the first cell through the second cell.
  • the processor is further configured to perform cell selection if the signal quality of the second cell is less than the first preset threshold.
  • the processor is further configured to execute the terminal through the third cell The connection recovery process between the device and the first cell.
  • the processor is further configured to further include: reporting to the second network device through the communication interface The third network device to which the fourth cell belongs sends a re-establishment request.
  • the processor configured to determine that the connection between the terminal device and the first cell fails, includes:
  • the processor is configured to determine that the time when the connection between the terminal device and the first cell fails is the first time
  • the processor configured to determine the signal quality of the second cell under the second network device, includes:
  • the processor is configured to determine the second network device if the time length between the time when the terminal device successfully switches to the first network device and the first time is greater than or equal to a second preset threshold The signal quality of the second cell below.
  • an embodiment of the present invention provides a terminal device.
  • the terminal device includes a processor for implementing the method described in the second aspect.
  • the terminal device may also include a memory for storing instructions and data.
  • the memory is coupled or integrated with the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect can be implemented.
  • the terminal device may also include a communication interface, which is used for the terminal device to communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. It can be a network device.
  • the terminal device includes:
  • Memory used to store program instructions
  • a processor configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • the processor is further configured to determine the signal quality of a second cell under a second network device, where both the first network device and the second network device provide communication services for the terminal device;
  • the processor is further configured to perform cell selection if the signal quality of the second cell is less than a first preset threshold.
  • the processor is further configured to:
  • the terminal device executes the connection recovery process between the terminal device and the first cell through the third cell.
  • the processor is further configured to report to the fourth cell to which the fourth cell belongs through the communication interface.
  • the third network device sends a re-establishment request.
  • the processor is configured to determine that the connection between the terminal device and the first cell fails, and includes: the processor is configured to determine the connection between the terminal device and the first cell The moment of failure is the first moment;
  • the processor is further configured to determine the signal quality of the second cell under the second network device, specifically:
  • the processor is further configured to determine that the second network device downloads the second network device if the time length between the moment when the terminal device successfully switches to the first network device and the first moment is less than a second preset threshold The signal quality of the second cell.
  • the processor configured to determine that the connection between the terminal device and the first cell fails, includes:
  • the processor is configured to determine that the time when the connection between the terminal device and the first cell fails is the first time
  • the processor is further configured to determine the signal quality of the second cell under the second network device, specifically:
  • the processor is further configured to determine the signal quality of the second cell under the second network device if the terminal device has not successfully handed over to the first network device at the first moment.
  • embodiments of the present invention also provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the method described in the first aspect.
  • an embodiment of the present invention also provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the method described in the second aspect.
  • embodiments of the present invention provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in the first aspect.
  • an embodiment of the present invention provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the method described in the second aspect.
  • an embodiment of the present invention provides a chip system.
  • the chip system includes a processor and may also include a memory for implementing the functions of the terminal device in the above method.
  • the chip system can be composed of chips, or can include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present application
  • FIG. 2 is a schematic diagram of a terminal device provided by an embodiment of the present application simultaneously connected to a primary base station and a secondary base station;
  • FIG. 3 is a schematic flowchart of a re-establishment process provided by an embodiment of the present application
  • FIG. 4 is a schematic diagram of an MCG recovery process provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a logical structure of a terminal device provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the logical structure of another terminal device provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the hardware structure of a terminal device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a communication chip provided by an embodiment of the present application.
  • FIG. 1 shows a wireless communication system related to an embodiment of the present application.
  • the wireless communication system 100 includes communication devices, and the communication devices can use air interface resources for wireless communication.
  • the communication device may include a network device 101 and a terminal device 102, and the network device 101 may also be referred to as a network side device.
  • the air interface resources may include at least one of time domain resources, frequency domain resources, code resources, and space resources.
  • the network device 101 may perform wireless communication with the terminal device 102 through one or more antennas. Each network device 101 can provide communication coverage for its corresponding coverage area 104. The coverage area 104 corresponding to the network device 101 may be divided into multiple sectors (sector), where one sector corresponds to a part of the coverage area (not shown). The network device 101 can communicate with the terminal device 102 through the wireless air interface 105. The network device 101 and the network device 101 may also communicate with each other directly or indirectly through an interface 107 (such as an X2/Xn interface).
  • an interface 107 such as an X2/Xn interface
  • the terminal device 102 involved in the embodiments of the present application can also be called a terminal, and can be a device with wireless transceiver function. It can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; or on water ( Such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal device may be a user equipment (UE), where the UE includes a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, or a computing device.
  • the UE may be a machine type communication (MTC) terminal, a mobile phone (mobile phone), a tablet computer, or a computer with a wireless transceiver function.
  • MTC machine type communication
  • Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the device used to implement the function of the terminal may be a terminal; it may also be a device capable of supporting the terminal to implement the function, such as a chip system, and the device may be installed in the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal is a terminal, and the terminal is a UE as an example to describe the technical solutions provided in the embodiments of the present application.
  • the network equipment involved in the embodiments of the present application includes a base station (base station, BS), which may be a device that is deployed in a wireless access network and can communicate with a terminal wirelessly.
  • the base station may have many forms, such as macro base stations, micro base stations, relay stations, and access points.
  • the base station involved in the embodiment of the present application may be a base station in 5G or a base station in LTE, where the base station in 5G may also be called a transmission reception point (TRP) or a next-generation node (next-generation node).
  • TRP transmission reception point
  • gNB next-generation node B
  • the device used to implement the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the device used to implement the functions of the network equipment is the network equipment, and the network equipment is a base station as an example to describe the technical solutions provided in the embodiments of the present application.
  • the wireless communication system 100 is not limited to a long-term evolution (LTE) system, but may also be a 5G system, an NR system, a wireless fidelity (wireless fidelity, Wi-Fi) system, etc. that will evolve in the future.
  • the wireless communication system 100 may also be an Internet of Things (IoT) system, an MTC system, a mMTC system, an enhanced machine type communication (eMTC) system, etc.
  • the technical solutions provided in the embodiments of the present application can be applied to wireless communication between communication devices.
  • the wireless communication between communication devices may include: wireless communication between a network device and a terminal, wireless communication between a network device and a network device, and wireless communication between a terminal and a terminal.
  • wireless communication can also be referred to as "communication” for short, and the term “communication” can also be described as "data transmission", "information transmission” or “transmission”.
  • This technical solution can be used for wireless communication between a scheduling entity and a subordinate entity.
  • Those skilled in the art can use the technical solution provided by the embodiments of this application to perform wireless communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations.
  • system and “network” in the embodiments of this application can be selected interchangeably.
  • Signals can also be described as sequences, data, etc. At least one can also be described as one or more, and multiple can be two, three, four or more, and this application is not limited. In view of this, in the embodiments of the present application, “a plurality of” may also be understood as “at least two”.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone.
  • the character "/" unless otherwise specified, generally indicates that the associated objects before and after are in an "or” relationship.
  • the technical feature is distinguished by “first”, “second”, “third”, “A”, “B”, “C”, and “D”.
  • the technical features in the “first”, “second”, “third”, “A”, “B”, “C” and “D” describe the technical features in no order or size order.
  • the terminal device 102 may be configured as a multi-connectivity (MC).
  • the terminal device 102 is configured as a dual-connectivity (DC) and the network device is a base station as an example for description.
  • DC dual-connectivity
  • the serving cell of the terminal device 102 under the primary base station includes a primary cell (Pcell) and 0 to n (n is a positive integer) secondary cells (Scell).
  • the serving cell group of the terminal device 102 under the master base station is called a master cell group (master cell group, MCG).
  • the serving cell of the terminal device 102 under the secondary base station includes a primary and secondary cell PScell and 0 to n secondary cells Scell.
  • the serving cell group of the terminal device 102 under the secondary base station is called a secondary cell group (SCG).
  • the terminal device When the terminal device is in the DC mode, it will detect whether the link between the terminal device and the MCG and the link between the terminal device and the SCG has a connection failure. If a connection failure occurs in the SCG, the terminal device is still in the connected state, and the terminal The device can report SCG connection failure information through MCG. Taking NRR15 (version 15, release 15) as an example, it is proposed that when a terminal device detects an MCG connection failure, the terminal device can only trigger the re-establishment process. During the re-establishment process, the terminal device stops all services. Even if the SCG does not fail to connect, the terminal device will stop service transmission with the SCG. Referring to FIG.
  • the re-establishment process may include: after the terminal device detects that the MCG connection fails, the terminal device stops all service transmissions and performs cell selection (step S101).
  • the cell selected by the cell may be any cell.
  • the terminal device initiates a re-establishment request to the network device through the competitive random access process in the selected cell (step S102), the terminal device receives the re-establishment message sent by the network device (step S103), and the terminal device sends a re-establishment complete message to the network device ( Step S104), the re-establishment is successful, and the terminal device enters the connected state to perform service transmission. Therefore, from the time the terminal device detects the MCG connection failure to when the terminal device completes the re-establishment process, the terminal device cannot perform service transmission.
  • R16 proposes a mechanism for the UE not to trigger the re-establishment process if the MCG fails to connect. Specifically, in the DC architecture, the terminal device will detect whether the link between the MCG and the SCG fails to connect. If the link between the terminal device and the MCG fails, the terminal device may not trigger the re-establishment procedure, but perform MCG recovery.
  • the MCG recovery process can also be referred to as the MCG recovery mechanism, and the MCG recovery can also be referred to as MCG fast recovery (MCG fast recovery).
  • the MCG recovery mechanism refers to the connection failure of the link between the terminal device and the MCG
  • the terminal device can report the connection failure information of the MCG through the SCG, and try to restore the connection between the terminal device and the MCG. It is understandable that the above recovery mechanism can also be referred to as a connection recovery process or a fast recovery process.
  • the terminal device can use SCG split signaling radio bearer (signal radio bearer, SRB) 1 or SRB3 or a new SCG SRB to indicate the MCG connection failure information to the SCG, so that the SCG can forward the above MCG connection
  • SRB signal radio bearer
  • the failure information is sent to the MCG, so that the MCG determines that the link between the terminal device and the MCG fails according to the MCG connection failure information, so as to perform MCG fast recovery (MCG fast recovery).
  • MCG fast recovery MCG fast recovery
  • the terminal device When MCG connection fails, the terminal device sends MCG connection failure information to the primary base station through split SRB1 on the secondary base station to which the SCG belongs, and the secondary base station sends the MCG connection failure information to the terminal device’s MCG.
  • the master base station sends the MCG connection failure information to notify the MCG and the terminal equipment that the connection has failed.
  • the link between the terminal device and the MCG fails can also be referred to as “the MCG fails to connect”
  • the “the link between the terminal device and the SCG fails” can also be referred to as " SCG failed to connect”
  • the MCG connection failure in the embodiment of the present application may refer to the connection failure of the link between the terminal device and the primary cell in the MCG or the special cell (SpCell) in the MCG, or the MCG connection failure may occur Refers to the connection failure of the link between the terminal equipment and all cells in the MCG.
  • the SCG connection failure in the embodiments of the present application may refer to the connection failure of the link between the terminal equipment and the primary and secondary cells in the SCG or the special cell (SpCell) in the SCG, or the connection failure between the terminal equipment and the SCG
  • the occurrence of connection failure may mean that all links between the cells in the SCG have connection failures.
  • the reasons for the connection failure may include at least one of the following: handover failure (HOF), radio link failure (RLF), reconfiguration synchronization failure, new radio (new radio) , NR) failure to switch to other systems, integrity check failure, radio resource control (radio resource control, RRC) connection reconfiguration failure, etc., which are not limited in the embodiment of the application.
  • HAF handover failure
  • RLF radio link failure
  • reconfiguration synchronization failure new radio
  • new radio new radio
  • NR new radio
  • integrity check failure radio resource control (radio resource control, RRC) connection reconfiguration failure, etc.
  • the MCG connection failure scenario includes at least one of the following: MCG RLF, RRC reconfiguration failure caused by the RRC reconfiguration message configured by the UE incapable of applying (apply) MCG configuration, complete guarantee failure, UE receiving handover The command cannot complete the configuration, or the UE fails to switch from NR to LTE, etc.
  • the above-mentioned RLF also includes handover scenarios, such as RLF caused by unreasonable configuration of handover parameters used by network equipment for handover decision-making.
  • the switching parameter includes at least one of quality threshold, hysteresis time, trigger time, threshold deviation, and the like.
  • Unreasonable handover parameter configuration may trigger too late handover (too late HO), too early handover (too early HO), handover to the wrong cell (HO to wrong cell), etc.
  • too late HO means that the terminal device fails to connect after the current cell service connection for a period of time, and the terminal device attempts to reestablish the connection in other cells. For example, the terminal device remains in the connected state in the current serving cell before the connection failure occurs. The quality of the current serving cell is degraded, but the terminal device does not receive the handover command, so the terminal device detects the connection failure in the current serving cell, and then the terminal device tries to reestablish the connection in other cells.
  • a period of time may be a relatively long period of time, that is, a relatively long period of time, and this embodiment does not limit the specific length of the "period of time".
  • the value for a period of time may be greater than 1s, that is, the terminal device fails to connect after the current cell service is connected for at least 1s.
  • Too early HO means that the terminal device fails to connect soon after successfully handing over from the source cell to the target cell, or if the connection fails during the handover from the source cell to the target cell, the terminal device tries to reestablish the connection in the source cell. For example, when the terminal device receives a handover command in the source cell, the connection failure occurs soon after switching to the target cell or the handover fails during the handover process, and the terminal device tries to reestablish the connection in the source cell.
  • “soon” can be understood as a relatively short period of time, and this embodiment does not limit the specific length of the period of time.
  • the value of the time period corresponding to "soon” may be less than 10 ms, that is, the connection failure occurs less than 10 ms after the terminal device successfully switches from the source cell to the target cell.
  • HO to wrong cell means that the terminal device successfully switches from the source cell to the target cell soon after the connection fails, or the connection fails in the process of switching from the source cell to the target cell, and the terminal device is in another cell (other cells are different The cell between the source cell and the target cell) attempts to reestablish the connection. For example, when the terminal device receives a handover command in the source cell, the connection failure occurs soon after switching to the target cell or the handover fails during the handover process, and the terminal device tries to reestablish the connection in other cells.
  • the UE when the UE detects that the link between the UE and the serving cell fails, the UE immediately executes the re-establishment procedure.
  • the original configuration of the UE is DC
  • the UE detects that the link between the UE and the MCG fails, under the MCG fast recovery mechanism, the UE will first try to perform MCG recovery on the SCG, and the SCG link may also It is worse, causing MCG recovery to fail.
  • the UE After the failure, the UE performs the reconstruction procedure again. Therefore, the UE reconstruction procedure may be delayed, that is, the UE data interruption time is prolonged.
  • the UE In the case of too early HO and HO to wrong cell, when the UE’s original serving network equipment is configured for the target handover configuration of the UE as DC, when the UE is in the handover process, it detects that the link between the UE and the target MCG fails. In combination with the MCG fast recovery mechanism, the UE will try to perform MCG recovery in the new SCG. Therefore, there is also a problem that the new SCG signal is not good and the MCG recovery fails, which lengthens the UE data interruption time.
  • the UE fails to connect to the MCG, it will execute the MCG fast recovery process. In a scenario where the handover parameter configuration is unreasonable, it will increase the UE's service interruption time. Therefore, in view of the failure of the primary base station connection in the DC scenario, how to reduce the duration of the UE's data interruption so as to resume the service of the UE as soon as possible is a technical problem to be solved in the embodiment of the present application.
  • the communication link failure processing method includes but is not limited to the following steps:
  • the terminal device determines that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device.
  • the terminal device determines the signal quality of the second cell under the second network device, and both the first network device and the second network device provide communication services for the terminal device.
  • step S503a If the signal quality of the second cell is greater than or equal to the first preset threshold, step S503a is executed; otherwise, step S503b is executed.
  • S503a The terminal device executes a connection restoration process between the terminal device and the first cell through the second cell.
  • the terminal device performs cell selection.
  • the first cell may be a primary cell or a special cell or all cells in a primary cell group (MCG) that provides services for terminal equipment, and the network equipment (such as a base station) to which the primary cell group belongs is the first network equipment.
  • MCG primary cell group
  • the first cell may include one or more cells.
  • the connection failure between the terminal equipment and the first cell includes at least one of the following: the connection between the terminal equipment and the primary cell in the MCG fails, the connection between the terminal equipment and the special cell in the MCG fails, or the terminal equipment and The connection of all cells in the MCG failed.
  • the second cell is at least one cell or special cell in the secondary cell group (SCG) that provides services for terminal equipment Or a primary and secondary cell, and the network device (such as a base station) to which the secondary cell group belongs is the second network device.
  • the second cell may include one or more cells.
  • the signal quality can include received signal code power (RSCP), reference signal receiving power (reference signal receiving power, RSRP), reference signal receiving quality (reference signal receiving quality, RSRQ), signal-to-noise ratio (RSRQ) At least one of noise ratio (SNR), signal to interference plus noise ratio (SINR), reference signal strength indication (RSSI), or other signal quality.
  • RSCP received signal code power
  • RSRP reference signal receiving power
  • RSRQ reference signal receiving quality
  • RSSRQ signal-to-noise ratio
  • SNR noise ratio
  • SI reference signal strength indication
  • the terminal device determines whether to perform the MCG quick recovery process (S503a) or perform cell selection (S503b). For example, if the signal quality of the second cell is greater than or equal to the first preset threshold, the terminal device performs a connection recovery process between the terminal device and the first cell through the second cell. If the signal quality of the second cell is less than the first preset threshold, the UE performs cell selection.
  • the terminal device determining the signal quality of the second cell includes: the effective signal quality of the second cell measured by the terminal device, or the signal quality of the second cell measured by the terminal device after the first cell connection fails.
  • the terminal device performs the connection recovery process between the terminal device and the first cell through the second cell, which may also be referred to as the MCG rapid recovery process.
  • the terminal device performing the connection recovery process between the terminal device and the first cell through the second cell includes: the terminal device sends connection failure information to the second network device to which the second cell belongs, the second network device receives the connection failure information sent by the terminal device, and Send the connection failure information to the first network device to which the first cell belongs. It is understandable that the connection failure information may also be referred to as MCG connection failure information.
  • the first network device After receiving the connection failure message, the first network device knows that a connection failure has occurred in the first cell, and can send a new configuration to the terminal device. The new configuration is used to restore the connection between the terminal device and the first network device (or the terminal device and The connection of the first cell) or configure the terminal equipment to switch to other cells.
  • the terminal device when the terminal device performs cell selection, the terminal device retains the configuration information of the SCG.
  • the configuration information of the SCG includes at least one of the frequency of the cell in the SCG, a physical cell identifier (PCI), and cell configuration information of the terminal device in the SCG.
  • PCI physical cell identifier
  • the terminal device performs cell selection (S503b) and the selected third cell is still a cell in the original SCG (for example, the third cell), the terminal device performs step S504a.
  • Step S504a The terminal device executes the MCG rapid recovery process through the third cell.
  • the third cell can be the same as or different from the second cell.
  • the terminal device performing the connection recovery process between the terminal device and the first cell through the third cell includes: the terminal device sends a connection failure message to the second network device to which the third cell belongs, the second network device receives the connection failure message sent by the terminal device, and The connection failure message is sent to the first network device to which the first cell belongs. After receiving the connection failure message, the first network device learns that a connection failure occurs in the first cell.
  • the terminal device performs step S504b.
  • Step S504b The terminal device initiates a re-establishment request through the new cell.
  • the terminal device sends a re-establishment request to the third network device to which the fourth cell belongs to trigger the re-establishment process.
  • step S502 if the signal quality of the second cell is greater than or equal to the first preset threshold, the terminal device performs the connection recovery process between the terminal device and the first cell through the second cell (S503a) If the signal quality of the second cell is less than the first preset threshold, the terminal device performs cell selection (S503b). If the new cell selected by the terminal device is a cell in the SCG (for example, a third cell), the terminal device performs a connection recovery process between the terminal device and the first cell through the selected new cell (S504a). If the new cell selected by the terminal device is a cell under another network device (for example, the fourth cell), the terminal device initiates a re-establishment request through the fourth cell (S504b).
  • SCG for example, a third cell
  • the terminal device performs a connection recovery process between the terminal device and the first cell through the selected new cell (S504a). If the new cell selected by the terminal device is a cell under another network device (for example, the fourth cell),
  • the foregoing first preset threshold may be predefined by a protocol, or may be received by the terminal device from the network device, and specifically may be received by the terminal device from the current serving base station (ie, the first network device).
  • the first preset threshold may be configured by the current serving base station itself, or may be received by the current serving base station from other base stations.
  • the terminal device when the terminal device detects that the MCG connection fails, the terminal device selects whether to perform the MCG quick recovery process or the cell selection process based on the measurement quality of the SCG to select the most appropriate recovery mechanism.
  • the foregoing embodiment is described with an example in which the first network device is the primary base station currently serving the terminal device and the second network device is the secondary base station currently serving the terminal device.
  • the embodiment of the present application can also be applied to a handover scenario.
  • the original serving network device is configured with a terminal device for switching
  • the terminal device can combine it in the target MCG
  • the dwell time and the signal quality of the target SCG are used to select whether to perform the target MCG rapid recovery process or the cell selection process.
  • the target MCG refers to the MCG that the terminal device needs to switch to during the handover process
  • the target SCG refers to the SCG that the terminal device needs to switch to during the handover process.
  • the description is made with an example in which the first network device is the target primary base station to which the terminal device currently needs to be handed over, and the second network device is the target secondary base station to which the terminal device currently needs to be handed over.
  • the method further includes:
  • the terminal device receives a first message sent by the fourth network device, where the first message is used to instruct the terminal device to switch from the fourth network device to the first network device and the second network device.
  • the terminal device switches from the fourth network device to the first network device and the second network device according to the first message.
  • the terminal device was previously connected to the fourth network device, and then switched to the first network device and the second network device through the switching process, that is, the terminal device can be configured as the target DC after the switch.
  • the handover of the terminal equipment to the first network equipment may also be referred to as the handover of the terminal equipment to the first cell (MCG) under the first network equipment.
  • the terminal device switches to the second network device, which can also be referred to as the terminal device switches to the second cell (SCG) under the second network device.
  • the first message may be one or a combination of RRC signaling, media access control (media access control, MAC) control element (CE), and downlink control information (downlink control information, DCI).
  • the first message includes the configuration information of the target MCG and the target SCG, that is, includes the configuration information of the first cell and the second cell.
  • the terminal device may determine whether to perform cell selection or perform the MCG quick recovery process based on the time length between the time when the terminal device successfully switches to the first network device and the first time and the quality of the SCG.
  • the first moment is the moment when connection failure occurs in the first cell.
  • the terminal device executes step S501 in the embodiment shown in FIG. 5 and possible subsequent steps.
  • the terminal device performs cell selection.
  • the terminal device performs cell selection and the selected cell is still a cell in the target SCG (for example, the third cell)
  • the terminal device performs the rapid recovery process of the target MCG through the third cell.
  • the terminal device if the terminal device selects a cell different from the SCG (for example, the fourth cell in the third network device) after performing cell selection, the terminal device initiates a re-establishment request through the new cell.
  • a cell different from the SCG for example, the fourth cell in the third network device
  • the terminal device initiates a re-establishment request through the new cell.
  • the terminal The device selects a cell if the time length between the moment when the terminal device successfully switches to the first network device and the first moment is less than a second preset threshold and the signal quality of the second cell is less than the first preset threshold.
  • a timer is started. If the timer running time is less than the second preset threshold T, the terminal device considers that "soon" a connection between the terminal device and the target MCG is detected failure.
  • the first preset threshold and the second preset threshold may be predefined by the protocol, or may be received by the terminal device from the network device, and specifically may be received by the terminal device from the current serving base station.
  • the first preset threshold and the second preset threshold may be configured by the current serving base station itself, or may be received by the current serving base station from other base stations.
  • the terminal device when the UE detects that the connection between the UE and the target MCG fails during the handover process (that is, a handover failure (HOF) occurs during the handover process), the terminal device does not successfully switch to the first network Device and second network device), the UE performs cell selection. Assuming that the UE selects the target cell, the UE performs a re-establishment procedure in the target cell. It is understandable that if the target cell belongs to a cell in the target SCG (that is, the second cell), the UE can perform the MCG fast recovery process. Optionally, if the terminal device is not successfully handed over to the first network device and the signal quality of the second cell is less than the first preset threshold, the terminal device performs cell selection.
  • HAF handover failure
  • the embodiments of this application can also be applied to handover scenarios.
  • the terminal device detects that the target MCG to which it is switched has failed to connect, the terminal device can select the execution target based on its residence time on the target MCG and the signal quality of the target SCG.
  • the MCG quick recovery process is still the cell selection process.
  • the terminal device when the terminal device detects that the target MCG to which it is switched has failed to connect, the terminal device can combine its residence time on the target MCG and the signal quality of the target SCG to choose whether to execute the target MCG
  • the rapid recovery process is still the cell selection process.
  • it can improve the data transmission interruption caused by the connection failure of the target MCG in the too early HO or HO to wrong cell scenario, which makes the re-establishment in the handover scenario Can be restored as soon as possible.
  • steps S501, S502, S503a, and S503b are based on steps S501, S502, S503a, and S503b as an embodiment.
  • the above steps S501, S502, and S503a can be taken as an embodiment separately, and the above step S501 , S502 and S503b can also be used as a separate embodiment, and the specific implementation process can also refer to the related description in the foregoing embodiment, which will not be repeated here.
  • this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the method implemented by the terminal device may also be implemented by a component (for example, a chip, a chip system, or a circuit) that can be configured in the terminal device.
  • a component for example, a chip, a chip system, or a circuit
  • the embodiments of the present application may divide the terminal device and the like into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 8 shows a schematic diagram of a possible logical structure of the terminal device involved in the foregoing embodiment.
  • the terminal device 800 includes: a first determining unit 801, a second determining unit 801 The unit 802 and the first restoration unit 803.
  • the terminal device 800 may be a terminal device or a component configurable in the terminal device.
  • the terminal device 800 may further include a communication unit.
  • the communication unit is used to support the terminal device 800 to perform the steps of receiving or sending information by the corresponding terminal device in the method embodiments shown in FIG. 5 to FIG. 7.
  • the first determining unit 801, the second determining unit 802, and the first restoring unit 803 are used to support the terminal device 800 to execute the corresponding terminal device-related processing steps in the method embodiments shown in FIG. 5 to FIG. Functions other than functions, etc.
  • the terminal device 800 may further include a storage unit for storing code (program) or data.
  • code program
  • data data
  • the first determining unit 801 is configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • the second determining unit 802 is configured to determine the signal quality of the second cell under the second network device, where both the first network device and the second network device provide communication services for the terminal device;
  • the first recovery unit 803 is configured to perform a connection recovery process between the terminal device and the first cell through the second cell if the signal quality of the second cell is greater than or equal to a first preset threshold.
  • first determining unit 801, second determining unit 802, and first restoring unit 803 may be processors or processing circuits.
  • the communication unit may be a transceiver or a transceiver circuit or an interface circuit.
  • the storage unit may be a memory. The above-mentioned first determining unit 801, second determining unit 802, and first restoring unit 803, the communication unit and the storage unit may be integrated or separated.
  • FIG. 9 shows a schematic diagram of a possible logical structure of the terminal device involved in the foregoing embodiment.
  • the terminal device 900 includes a first determining unit 901, a second determining unit 902, and a first restoring unit 903.
  • the terminal device 900 may be a terminal device or a component configurable in the terminal device.
  • the terminal device 900 may further include a communication unit.
  • the communication unit is used to support the terminal device 900 to perform the steps of receiving or sending information by the corresponding terminal device in the method embodiments shown in FIG. 5 to FIG. 7.
  • the first determining unit 901, the second determining unit 902, and the selecting unit 903 are used to support the terminal device 900 to execute the processing steps related to the corresponding terminal device in the method embodiments shown in FIGS. 5 to 7, for example, to achieve functions other than the transceiver unit Other functions, etc.
  • the terminal device 900 may further include a storage unit for storing code (program) or data.
  • code program
  • the first determining unit 901 is configured to determine that the connection between the terminal device and the first cell fails, and the first cell is a cell under the first network device;
  • the second determining unit 902 is configured to determine the signal quality of the second cell under the second network device, where both the first network device and the second network device provide communication services for the terminal device;
  • the selecting unit 903 is configured to perform cell selection if the signal quality of the second cell is less than the first preset threshold.
  • the aforementioned first determining unit 901, second determining unit 902, and selecting unit 903 may be processors or processing circuits.
  • the communication unit may be a transceiver or a transceiver circuit or an interface circuit.
  • the storage unit may be a memory. The above-mentioned first determining unit 901, second determining unit 902, and selecting unit 903, the communication unit, and the storage unit may be integrated or separated.
  • FIG. 10 shows a schematic diagram of a possible hardware structure of a terminal device provided by an embodiment of this application.
  • the terminal device 1000 is used to implement the functions of the terminal device in the foregoing method.
  • the terminal device may also be a device in the terminal device.
  • the device may be a chip system.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the terminal device 1000 includes at least one processor 1002, configured to implement the function of the terminal device in the method provided in the embodiment of the present application.
  • the processor 1002 may determine that the connection between the terminal device and the first cell fails, the processor 1002 may also determine the signal quality of the second cell under the second network device, and the processor 1002 may also When the signal quality of the cell is greater than or equal to the first preset threshold, the connection recovery process between the terminal device and the first cell is performed through the second cell.
  • the connection recovery process between the terminal device and the first cell is performed through the second cell.
  • the terminal device 1000 may also include at least one memory 1003 for storing program instructions and/or data.
  • the memory 1003 is coupled with the processor 1002.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1002 may operate in cooperation with the memory 1003.
  • the processor 1002 may execute program instructions stored in the memory 1003. At least one of the at least one memory may be included in the processor.
  • the terminal device 1000 may further include a communication interface 1001 for communicating with other devices through a transmission medium, so that the terminal device 1000 can communicate with other devices.
  • the other device may be a network device.
  • the processor 1002 uses the communication interface 1001 to send and receive data, and is used to implement the method executed by the terminal device described in the embodiments corresponding to FIGS. 5 to 7.
  • the communication interface 1001 may be a transceiver, an interface, a bus, a circuit, or a device capable of implementing a transceiving function.
  • connection medium between the aforementioned communication interface 1001, the processor 1002, and the memory 1003 is not limited in the embodiment of the present application.
  • the memory 1003, the processor 1002, and the communication interface 1001 are connected by a bus 1004.
  • the bus is represented by a thick line in FIG. 10, and the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or Perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function, for storing program instructions and/or data.
  • the terminal device 1000 may be the terminal device 1002 in the wireless communication system 1000 shown in FIG. 1, and may be implemented as an eMTC device, a mobile device, a mobile station, a mobile unit, and a wireless unit. Remote units, user agents, mobile clients, etc.
  • the terminal device 1000 shown in FIG. 10 is only an implementation manner of the embodiment of the present application. In practical applications, the terminal device 1000 may also include more or fewer components, which is not limited here. For the specific implementation of the terminal device 1000, reference may be made to related descriptions in the foregoing method embodiments, and details are not described herein again.
  • the communication chip 1100 may include a processor 1101 and one or more interfaces 1102 coupled to the processor 1101.
  • the processor 1101 can be used to read and execute computer-readable instructions.
  • the processor 1101 may mainly include a controller, an arithmetic unit, and a register.
  • the controller is mainly responsible for instruction decoding, and sends control signals for operations corresponding to the instructions.
  • the arithmetic unit is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations and logical operations, etc., and can also perform address operations and conversions.
  • the register is mainly responsible for storing the register operands and intermediate operation results temporarily stored during the execution of the instruction.
  • the hardware architecture of the processor 1101 can be an application specific integrated circuit (ASIC) architecture, a microprocessor without interlocked pipeline stage architecture (microprocessor without interlocked stages architecture, MIPS) architecture, and advanced streamlining. Instruction set machine (advanced RISC machines, ARM) architecture or NP architecture, etc.
  • the processor 1101 may be single-core or multi-core.
  • the interface 1102 can be used to input data to be processed to the processor 1101, and can output the processing result of the processor 1101 externally.
  • the interface 1102 can be a general purpose input output (GPIO) interface, which can be connected to multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (RF) module, etc.) connection.
  • GPIO general purpose input output
  • the interface 1102 is connected to the processor 1101 through the bus 1103.
  • the processor 1101 can be used to call and execute instructions from the memory to implement the implementation program or data on the terminal device side of the method provided by one or more embodiments of the present application, so that the chip can implement the foregoing The method shown in Figure 5 to Figure 7.
  • the memory may be integrated with the processor 1101, or may be coupled with the communication chip 1100 through the interface 1102, that is to say, the memory may be a part of the communication chip 1100, or may be independent of the communication chip 1100.
  • the interface 1102 can be used to output the execution result of the processor 1101. In this application, the interface 1102 may be specifically used to output signals generated by the processor 1101.
  • each of the processor 1101 and the interface 1102 can be implemented either through hardware design, through software design, or through a combination of software and hardware, which is not limited here.
  • a computer storage medium is also provided, and computer execution instructions are stored in the computer storage medium.
  • a device may be a single-chip microcomputer, a chip, etc.
  • the storage medium can be stored in a readable storage medium.
  • the computer executes the instructions, so that the device or the processor executes the steps of the terminal device in the methods provided in FIGS. 5 to 7.
  • the foregoing computer storage media may include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.
  • a computer program product includes computer-executable instructions stored in a computer-readable storage medium; at least one processor of the device can be accessed from a computer
  • the read storage medium reads the computer-executable instruction, and at least one processor executes the computer-executable instruction to make the device implement the steps of the terminal device in the method provided in FIGS. 5 to 7.
  • a communication system in another embodiment, is also provided.
  • the communication system includes multiple devices, and the multiple devices include network devices and terminal devices.
  • the terminal device may be the terminal device 800 shown in FIG. 8 or the terminal device 900 provided in FIG. 9 or the terminal device 1000 provided in FIG. 10, and is used to execute the corresponding methods in the methods provided in FIGS. 5 to 7 Steps for terminal equipment.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, SSD).
  • the embodiments can be mutually cited.
  • methods and/or terms between method embodiments can be mutually cited, such as functions and/or functions between device embodiments.
  • Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

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Abstract

本申请实施例公开了一种通信方法、终端设备及计算机可读存储介质，应用于通信技术领域，其中，该方法包括：终端设备确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；所述终端设备确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；若所述第二小区的信号质量大于等于第一预设阈值，所述终端设备通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。实施本申请实施例，针对终端设备的主基站连接失败情况，能够降低终端设备的数据中断时长。

Description

一种通信方法、终端设备及计算机可读存储介质
本申请要求于2019年07月23日提交中国专利局、申请号为201910673876.5、申请名称为“一种通信方法、终端设备及计算机可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种通信方法、终端设备及计算机可读存储介质。
背景技术
在双连接(dual-connectivity，DC)场景下，用户设备(user equipment，UE)一般连接2个服务基站，一个为主基站，另一个为辅基站。如果辅基站发生连接失败，UE依然维持在连接态，并且UE可以通过主基站上报辅基站的连接失败信息，如果主基站发生连接失败，UE只能触发重建立流程。从UE检测到主基站连接失败到UE完成重建立流程的时间内，UE无法进行业务传输。
第三代合作伙伴计划(third generation partnership project，3GPP)版本16(Release16，R16)中针对主基站发生连接失败的情况提出了一种新的解决方案，即如果主基站发生连接失败，终端设备可以不触发重建立流程，而是通过辅基站进行主基站恢复过程。
但是引入了主基站恢复的过程，可能会拉长终端数据中断的时间。
发明内容
本申请实施例提供了一种通信方法、终端设备及计算机可读存储介质，针对终端设备的主基站连接失败情况，能够降低终端设备的数据中断时长。
第一方面，本申请实施例提供了一种通信方法，应用于终端设备，该方法包括：终端设备确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区。所述终端设备确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务。若所述第二小区的信号质量大于等于第一预设阈值，所述终端设备通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。实施本申请实施例，当终端设备检测到MCG发生连接失败时，终端设备基于SCG的测量质量选择是否执行MCG快速恢复过程，避免终端设备在MCG连接失败后直接执行MCG快速恢复流程在切换参数配置不合理的场景下反而会加剧UE的业务中断时长，本申请实施例可以选择最合适的恢复机制，能够降低终端设备的数据中断时长。
在一种可能的设计中，上述方法还包括：若所述第二小区的信号质量小于所述第一预设阈值，所述终端设备进行小区选择。实施本申请实施例，当终端设备检测到MCG发生连接失败时，终端设备基于SCG的测量质量选择是执行MCG快速恢复过程还是小区选择过程，以选择最合适的恢复机制，可以选择最合适的恢复机制，能够降低终端设备的数据中断时长。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为所述第二网络设 备的第三小区，所述方法还包括：所述终端设备通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。实施本申请实施例，采用原SCG中的第三小区继续执行MCG的快速恢复过程，可以降低终端设备的数据中断时长。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述方法还包括：所述终端设备向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述终端设备确定所述终端设备和第一小区的连接失败，包括：所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；所述终端设备确定第二网络设备下的第二小区的信号质量，包括：若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长大于或等于第二预设阈值，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
在一种可能的设计中，所述终端设备确定所述终端设备和第一小区的连接失败之前，还包括：
所述终端设备接收第四网络设备发送的第一消息，所述第一消息用于指示所述终端设备由所述第四网络设备切换至所述第一网络设备和所述第二网络设备；
所述终端设备根据所述第一消息由所述第四网络设备切换至所述第一网络设备和所述第二网络设备。
第二方面，本申请实施例提供了一种通信方法，应用于终端设备，该方法包括：终端设备确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；所述终端设备确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；若所述第二小区的信号质量小于第一预设阈值，所述终端设备进行小区选择。实施本申请实施例，当终端设备检测到MCG发生连接失败时，终端设备基于SCG的测量质量选择是否执行小区选择，本申请实施例可以选择最合适的恢复机制，能够降低终端设备的数据中断时长。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述方法还包括：所述终端设备通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。实施本申请实施例，采用原SCG中的第三小区继续执行MCG的快速恢复过程，可以降低终端设备的数据中断时长。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述方法还包括：所述终端设备向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述终端设备确定所述终端设备和第一小区的连接失败，包括：所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；所述终端设备确定第二网络设备下的第二小区的信号质量，具体为：若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长小于第二预设阈值，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
在一种可能的设计中，所述终端设备确定所述终端设备和第一小区的连接失败，包括：所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；所述终端 设备确定第二网络设备下的第二小区的信号质量，具体为：若所述终端设备在所述第一时刻还未成功切换至所述第一网络设备，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
在一种可能的设计中，所述终端设备确定所述终端设备和第一小区的连接失败之前，还包括：
所述终端设备接收第四网络设备发送的第一消息，所述第一消息用于指示所述终端设备由所述第四网络设备切换至所述第一网络设备和所述第二网络设备；
所述终端设备根据所述第一消息由所述第四网络设备切换至所述第一网络设备和所述第二网络设备。
第三方面，本发明实施例提供了一种终端设备，该终端设备还可以是终端设备中的装置，或者是能够和终端设备匹配使用的装置。一种设计中，该终端设备可以包括执行第一方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该终端设备可以包括第一确定单元、第二确定单元和第一恢复单元。示例性地，
第一确定单元，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
第二确定单元，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
第一恢复单元，用于若所述第二小区的信号质量大于等于第一预设阈值，通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，所述终端设备还包括：
选择单元，用于若所述第二小区的信号质量小于所述第一预设阈值，进行小区选择。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述终端设备还包括：
第二恢复单元，用于通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述终端设备还包括：
发送单元，用于向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述第二确定单元，具体用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长大于或等于第二预设阈值，则确定所述第二网络设备下的第二小区的信号质量。
第四方面，本发明实施例提供了一种终端设备，该终端设备还可以是终端设备中的装置，或者是能够和终端设备匹配使用的装置。一种设计中，该终端设备可以包括执行第二方面中所描述的方法/操作/步骤/动作所一一对应的模块，该模块可以是硬件电路，也可是软件，也可以是硬件电路结合软件实现。一种设计中，该终端设备可以包括第一确定单元、 第二确定单元和选择单元。示例性地，
第一确定单元，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
第二确定单元，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
选择单元，用于若所述第二小区的信号质量小于第一预设阈值，进行小区选择。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述终端设备还包括：
恢复单元，用于通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述终端设备还包括：
发送单元，用于向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述第二确定单元，具体用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长小于第二预设阈值，确定所述第二网络设备下的第二小区的信号质量。
在一种可能的设计中，所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述第二确定单元，具体用于若所述终端设备在所述第一时刻还未成功切换至所述第一网络设备，则确定所述第二网络设备下的第二小区的信号质量。
第五方面，本发明实施例提供一种终端设备，所述终端设备包括处理器，用于实现上述第一方面描述的方法。所述终端设备还可以包括存储器，用于存储指令和数据。所述存储器与所述处理器耦合或者集成在一起，所述处理器执行所述存储器中存储的指令时，可以实现上述第一方面描述的方法。所述终端设备还可以包括通信接口，所述通信接口用于该终端设备与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为网络设备。在一种可能的设备中，该终端设备包括：
存储器，用于存储程序指令；
处理器，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
所述处理器，还用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
所述处理器，还用于若所述第二小区的信号质量大于等于第一预设阈值，通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，所述处理器，还用于若所述第二小区的信号质量小于所述第一预设阈值，进行小区选择。
在一种可能的设计中，若所述处理器进行小区选择后选择的小区为所述第二网络设备 的第三小区，所述处理器，还用于通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，若所述处理器进行小区选择后选择的小区为第三网络设备的第四小区，所述处理器，还用于还包括：通过所述通信接口向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述处理器，用于确定所述终端设备和第一小区的连接失败，包括：
所述处理器，用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述处理器，用于确定第二网络设备下的第二小区的信号质量，包括：
所述处理器，用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长大于或等于第二预设阈值，则确定所述第二网络设备下的第二小区的信号质量。
第六方面，本发明实施例提供一种终端设备，所述终端设备包括处理器，用于实现上述第二方面描述的方法。所述终端设备还可以包括存储器，用于存储指令和数据。所述存储器与所述处理器耦合或者集成在一起，所述处理器执行所述存储器中存储的指令时，可以实现上述第二方面描述的方法。所述终端设备还可以包括通信接口，所述通信接口用于该终端设备与其它设备进行通信，示例性的，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，其它设备可以为网络设备。在一种可能的设备中，该终端设备包括：
存储器，用于存储程序指令；
处理器，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
所述处理器，还用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
所述处理器，还用于若所述第二小区的信号质量小于第一预设阈值，进行小区选择。
在一种可能的设计中，若所述处理器进行小区选择后选择的小区为所述第二网络设备的第三小区，所述处理器，还用于：
所述终端设备通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
在一种可能的设计中，若所述处理器进行小区选择后选择的小区为第三网络设备的第四小区，所述处理器，还用于通过所述通信接口向所述第四小区所属的所述第三网络设备发送重建立请求。
在一种可能的设计中，所述处理器，用于确定所述终端设备和第一小区的连接失败，包括：所述处理器，用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述处理器，还用于确定第二网络设备下的第二小区的信号质量，具体为：
所述处理器，还用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长小于第二预设阈值，则确定所述第二网络设备下的第二小区的信号质量。
在一种可能的设计中，所述处理器，用于确定所述终端设备和第一小区的连接失败，包括：
所述处理器，用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
所述处理器，还用于确定第二网络设备下的第二小区的信号质量，具体为：
所述处理器，还用于若所述终端设备在所述第一时刻还未成功切换至所述第一网络设备，则确定所述第二网络设备下的第二小区的信号质量。
第七方面，本发明实施例中还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行第一方面所述的方法。
第八方面，本发明实施例中还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行第二方面所述的方法。
第九方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面所述的方法。
第十方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第二方面所述的方法。
第十一方面，本发明实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述方法中终端设备的功能。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要选择的附图进行说明。
图1是本申请实施例提供的无线通信系统的架构示意图；
图2是本申请实施例提供的终端设备同时连接主基站和辅基站的示意图；
图3是本申请实施例提供的一种重建立过程的流程示意图；
图4是本申请实施例提供的一种MCG恢复过程的示意图；
图5是本申请实施例提供的一种通信方法的流程示意图；
图6是本申请实施例提供的另一种通信方法的流程示意图；
图7是本申请实施例提供的另一种通信方法的流程示意图；
图8是本申请实施例提供的一种终端设备的逻辑结构示意图；
图9是本申请实施例提供的另一种终端设备的逻辑结构示意图；
图10是本申请实施例提供的一种终端设备的硬件结构示意图；
图11是本申请实施例提供的一种通信芯片的结构示意图。
具体实施方式
本申请的实施方式部分选择的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
参考图1，图1示出了本申请实施例涉及的无线通信系统。在无线通信系统100中，包括通信设备，通信设备间可以利用空口资源进行无线通信。其中，通信设备可以包括网络设备101和终端设备102，网络设备101还可以称为网络侧设备。空口资源可以包括时域 资源、频域资源、码资源和空间资源中至少一个。
网络设备101可以通过一个或多个天线来和终端设备102进行无线通信。各个网络设备101均可以为各自对应的覆盖范围104提供通信覆盖。网络设备101对应的覆盖范围104可以被划分为多个扇区(sector)，其中，一个扇区对应一部分覆盖范围(未示出)。网络设备101可以通过无线空口105与终端设备102通信。网络设备101与网络设备101之间也可以通过接口107(如X2/Xn接口)直接地或者间接地相互通信。
本申请实施例涉及到的终端设备102还可以称为终端，可以是一种具有无线收发功能的设备，其可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备(user equipment，UE)，其中，UE包括具有无线通信功能的手持式设备、车载设备、可穿戴设备或计算设备。示例性地，UE可以是机器类通信(machine type communication，MTC)终端、手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端设备还可以是虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请实施例中，用于实现终端的功能的装置可以是终端；也可以是能够支持终端实现该功能的装置，例如芯片系统，该装置可以被安装在终端中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中，以用于实现终端的功能的装置是终端，以终端是UE为例，描述本申请实施例提供的技术方案。
本申请实施例涉及到的网络设备包括基站(base station，BS)，可以是一种部署在无线接入网中能够和终端进行无线通信的设备。其中，基站可能有多种形式，比如宏基站、微基站、中继站和接入点等。示例性地，本申请实施例涉及到的基站可以是5G中的基站或LTE中的基站，其中，5G中的基站还可以称为发送接收点(transmission reception point，TRP)或下一代节点(next-generation Node B，gNB)。本申请实施例中，用于实现网络设备的功能的装置可以是网络设备；也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备，以网络设备是基站为例，描述本申请实施例提供的技术方案。
本申请中，无线通信系统100不限于长期演进(long term evolution，LTE)系统，还可以是未来演进的5G系统、NR系统、无线高保真(wireless fidelity，Wi-Fi)系统等。无线通信系统100还可以是物联网(internet of things，IoT)系统、MTC系统、mMTC系统、增强型机器类通信(enhanced machine type communication，eMTC)系统等。
本申请实施例提供的技术方案可以应用于通信设备间的无线通信。通信设备间的无线通信可以包括：网络设备和终端间的无线通信、网络设备和网络设备间的无线通信以及终端和终端间的无线通信。其中，在本申请实施例中，术语“无线通信”还可以简称为“通信”，术语“通信”还可以描述为“数据传输”、“信息传输”或“传输”。该技术方案可用于进行调度实体和从属实体间的无线通信，本领域技术人员可以将本申请实施例提供的技术方案用于进行其它调度实体和从属实体间的无线通信，例如宏基站和微基站之间的无线通信，例如第 一终端和第二终端间的无线通信。
需要说明的是，本申请实施例中的术语“系统”和“网络”可被互换选择。信号还可以描述为序列、数据等。至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本申请不做限制。鉴于此，本申请实施例中也可以将“多个”理解为“至少两个”。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
在本申请实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
本申请实施例中，终端设备102可以配置成多连接(multi-connectivity，MC)。本申请实施例以终端设备102配置成双连接(dual-connectivity，DC)、网络设备为基站为例进行描述。终端设备102在DC模式时，可以连接2个服务基站，一个为主基站，另一个为辅基站。可参见图2所示，终端设备102在主基站下的服务小区包括主小区(primary cell，Pcell)和0～n(n为正整数)个辅小区(secondary cell，Scell)。终端设备102在主基站下的服务小区组称为主小区组(master cell group，MCG)。终端设备102在辅基站下的服务小区包括主辅小区PScell和0～n个辅小区Scell，终端设备102在辅基站下的服务小区组称为辅小区组(secondary cell group，SCG)。
终端设备在DC模式时，会检测终端设备和MCG之间的链路以及终端设备和SCG之间的链路是否发生连接失败，如果在SCG发生连接失败，终端设备依然维持在连接态，并且终端设备可以通过MCG上报SCG的连接失败信息。以NRR15(版本15，release 15)为例，提出了当终端设备检测到MCG发生连接失败，终端设备只能触发重建立流程。在重建立过程中终端设备停止所有的业务，即使SCG没有发生连接失败，终端设备也会停止与SCG之间的业务传输。参见图3所示，重建立流程可以包括：终端设备检测到MCG连接失败后，终端设备停止所有的业务传输，执行小区选择(步骤S101)，小区选择的小区可以是任一小区。终端设备在选择的小区通过竞争随机接入流程向网络设备发起重建立请求(步骤S102)，终端设备接收网络设备发送的重建立消息(步骤S103)，终端设备向网络设备发送重建立完成消息(步骤S104)，则重建立成功，终端设备进入连接态才可以进行业务传输。因此从终端设备检测到MCG连接失败到终端设备完成重建立流程的时间内，终端设备无法进行业务传输。
R16中提出了如果MCG发生连接失败，UE不触发重建立流程的机制。具体的，在DC架构下，终端设备会检测MCG和SCG的链路是否发生连接失败。如果终端设备与MCG之间的链路发生连接失败，终端设备可以不触发重建立流程，而是进行MCG恢复。该MCG恢复的过程也可以称为MCG恢复机制，MCG恢复还可以称为MCG快速恢复(MCG fast recovery)。
作为示例，MCG恢复机制指的是终端设备与MCG之间的链路发生连接失败，终端设备可以通过SCG上报MCG的连接失败信息，并尝试恢复终端设备与MCG之间的连接。 可以理解的，上述恢复机制又可以称为连接恢复过程或者快速恢复过程。
作为MCG恢复的一个示例，终端设备可以通过SCG分裂(split)信令无线承载(signal radio bearer，SRB)1或SRB3或新的SCG SRB向SCG指示MCG连接失败信息，使得SCG可以转发上述MCG连接失败信息给MCG，使得MCG根据MCG连接失败信息确定终端设备和MCG之间的链路发生连接失败，从而进行MCG快速恢复(MCG fast recovery)。图4以通过split SRB1进行MCG fast recovery为例，在MCG发生连接失败时，终端设备通过SCG所属的辅基站上的split SRB1向主基站发送MCG连接失败信息，辅基站向终端设备的MCG所属的主基站发送MCG连接失败信息，以通知MCG与终端设备之间的连接失败。
本申请实施例中，“终端设备和MCG之间的链路发生连接失败”还可以称为“MCG发生连接失败”，“终端设备和SCG之间的链路发生连接失败”还可以称为“SCG发生连接失败”，但本申请实施例并不限于此。作为示例，本申请实施例中的MCG发生连接失败可以指终端设备与MCG中的主小区或MCG中的特殊小区(special cell，SpCell)之间的链路发生连接失败，或者MCG发生连接失败可以指终端设备与MCG中的全部小区之间的链路都发生连接失败。
类似的，本申请实施例中的SCG发生连接失败可以指终端设备与SCG中的主辅小区或SCG中的特殊小区(special cell，SpCell)之间的链路发生连接失败，或者终端设备与SCG发生连接失败可以指SCG中的全部小区之间的链路都发生连接失败。
本申请实施例中，导致连接失败的原因可以包括下述至少一种：切换失败(handover failure，HOF)、无线链路失败(radio link failure，RLF)、重配同步失败、新无线(new radio，NR)向其他系统切换失败、完整性校验失败(integrity check failure)、无线资源控制(radio resource control，RRC)连接重配置失败等等，本申请实施例对此不作限定。
本申请实施例中，MCG的连接失败场景包括下述至少一种：MCG RLF、UE无法应用(apply)MCG配置的RRC重配消息带来的RRC重配失败、完保失败、UE收到切换命令无法完成配置、或者UE从NR切换到LTE失败等。
上述RLF也包括切换场景，比如网络设备用于切换决策的切换参数配置不合理造成的RLF。其中，切换参数包括质量门限、迟滞时间、触发时间、门限偏差等中的至少一种。切换参数配置不合理可能触发过晚切换(too late HO)、过早切换(too early HO)、切换到错误小区(HO to wrong cell)等。其中，too late HO是指终端设备在当前小区服务连接一段时间后发生连接失败，终端设备在其他小区尝试重建连接。比如终端设备在发生连接失败之前在当前服务小区保持在连接态。当前服务小区质量变差，但是终端设备没有收到切换命令，因此终端设备在当前服务小区检测到连接失败，然后终端设备在其他小区尝试重建连接。
需要说明的是，本申请实施例中，“一段时间”可以是较长的一段时间，即一个较长的时间段，本实施例对该“一段时间”的具体长度不做限定。例如，一段时间的值可以大于1s，即终端设备在当前小区服务连接了至少1s后发生连接失败。
too early HO是指终端设备成功从源小区切换到目标小区后很快发生连接失败，或者，在从源小区切换到目标小区的过程中发生连接失败，终端设备在源小区尝试重建连接。比 如终端设备在源小区收到切换命令，切换到目标小区后很快发生连接失败或者在切换过程中发生切换失败，终端设备在源小区尝试重建连接。
需要说明的是，本申请实施例中，“很快”可以理解为一个较短的时间段，本实施例对该时间段的具体长度不做限定。例如，“很快”对应的时间段的值可以小于10ms，即终端设备成功从源小区切换到目标小区后不到10ms就发生连接失败。
HO to wrong cell是指终端设备成功从源小区切换到目标小区后很快发生连接失败，或者，在从源小区切换到目标小区的过程中发生连接失败，终端设备在其它小区(其它小区为不同于源小区和目标小区的小区)尝试重建连接。比如终端设备在源小区收到切换命令，切换到目标小区后很快发生连接失败或者在切换过程中发生切换失败，终端设备在其它小区尝试重建连接。
在上述切换场景下，由于引入MCG fast recovery过程，可能拉长了数据中断的时间，以下针对上述三种切换情况分别进行描述。
too late HO时，若UE仅和一个网络设备建立连接，当UE检测到UE和服务小区之间的链路发生连接失败时，UE立即执行重建立流程。而当UE的原配置为DC时，当UE检测到UE和MCG之间的链路发生连接失败，在MCG fast recovery机制下，UE会先尝试在SCG进行MCG恢复，而SCG的链路可能也较差了，造成MCG恢复失败，失败后UE再进行重建流程，因此可能延迟了UE的重建流程，即反而拉长了UE数据中断时间。
针对too early HO和HO to wrong cell的情况，当UE的原服务网络设备为UE配置的目标切换配置为DC，当UE在切换过程中，检测到UE和目标MCG之间的链路发生连接失败，结合MCG fast recovery机制，UE会尝试在new SCG进行MCG恢复，因此也存在new SCG信号不好而导致MCG恢复失败从而拉长了UE数据中断时间的问题。
针对上述几种情况，UE如果在MCG发生连接失败就执行MCG fast recovery过程，在切换参数配置不合理的场景下反而会加剧UE的业务中断时长。因此，针对DC场景下的主基站连接失败情况，如何降低UE的数据中断时长以尽快恢复UE的业务是本申请实施例需要解决的技术问题。
基于前述无线通信系统100，本申请实施例提供了一种通信方法。参见图5，该通信链路故障处理方法包括但不限于如下步骤：
S501、终端设备确定终端设备和第一小区的连接失败，第一小区为第一网络设备下的小区。
S502、终端设备确定第二网络设备下的第二小区的信号质量，第一网络设备和第二网络设备均为终端设备提供通信服务。
若第二小区的信号质量大于等于第一预设阈值，则执行步骤S503a；否则，执行步骤S503b。
S503a、终端设备通过第二小区执行终端设备和第一小区的连接恢复过程。
S503b、终端设备执行小区选择。
本申请实施例中，第一小区可以是为终端设备提供服务的主小区组(MCG)中的主小区或者特殊小区或者全部小区，该主小区组所属的网络设备(例如基站)为第一网络设备。 第一小区可以包括一个或多个小区。终端设备和第一小区的连接失败(即MCG发生连接失败)，包括如下至少一种：终端设备和MCG中的主小区的连接失败、终端设备和MCG中的特殊小区的连接失败或者终端设备和MCG中的全部小区的连接失败。
当UE配置为DC时，当UE检测到MCG发生连接失败，UE可以测量第二小区的信号质量，第二小区是为终端设备提供服务的辅小区组(SCG)中的至少一个小区或者特殊小区或者主辅小区，该辅小区组所属的网络设备(例如基站)为第二网络设备。第二小区可以包括一个或多个小区。其中，信号质量可以包括收信号码功率(received signal code power，RSCP)、参考信号接收功率(reference signal receiving power，RSRP)、参考信号接收质量(reference signal receiving quality，RSRQ)、信噪比(signal noise ratio，SNR)、信号与干扰加噪声比(signal to interference plus noise ratio，SINR)、参考信号强度指示(reference signal strength indication，RSSI)或其它信号质量中的至少一种。终端设备根据第二小区的质量，确定是执行MCG快速恢复过程(S503a)，还是执行小区选择(S503b)。例如，若第二小区的信号质量大于或等于第一预设阈值，则终端设备通过第二小区执行终端设备和第一小区的连接恢复过程。若第二小区的信号质量小于第一预设阈值，则UE执行小区选择。
其中，终端设备确定第二小区的信号质量，包括：终端设备测量到的第二小区的有效的信号质量，还可以是终端设备在第一小区连接失败后测量的第二小区的信号质量。
在S503a中，终端设备通过第二小区执行终端设备和第一小区的连接恢复过程，又可称为MCG的快速恢复过程。终端设备通过第二小区执行终端设备和第一小区的连接恢复过程包括：终端设备向第二小区所属的第二网络设备发送连接失败信息，第二网络设备接收终端设备发送的连接失败信息，并将连接失败信息发送给第一小区所属的第一网络设备。可以理解的，该连接失败信息又可以称为MCG连接失败信息。第一网络设备接收到该连接失败消息后，获知第一小区发生连接失败，可以为终端设备发送新配置，该新配置用于恢复终端设备和第一网络设备之间的连接(或终端设备和第一小区的连接)或者配置终端设备切换到其它小区。
可选的，终端设备执行小区选择时，终端设备保留SCG的配置信息。SCG的配置信息包括：SCG中的小区的频点，物理小区标识(physical cell identifier,PCI)、终端设备在SCG的小区配置信息等至少一种。
可选的，若终端设备执行小区选择(S503b)后，选择到的第三小区还是原SCG中的小区(例如第三小区)，则终端设备执行步骤S504a。
步骤S504a、终端设备通过第三小区执行MCG的快速恢复过程。
第三小区可以和第二小区相同，也可以不相同。终端设备通过第三小区执行终端设备和第一小区的连接恢复过程包括：终端设备向第三小区所属的第二网络设备发送连接失败消息，第二网络设备接收终端设备发送的连接失败消息，并将连接失败消息发送给第一小区所属的第一网络设备。第一网络设备接收到该连接失败消息后，获知第一小区发生连接失败。
可选的，若终端设备执行小区选择后，选择到了不同于SCG的小区(例如第三网络设备中的第四小区)，则终端设备执行步骤S504b。
步骤S504b、终端设备通过新小区发起重建立请求。
例如，终端设备向第四小区所属的第三网络设备发送重建立请求，以触发重建立过程。
例如，参见图6所示，在步骤S502之后，若第二小区的信号质量大于或等于第一预设阈值，则终端设备通过第二小区执行终端设备和第一小区的连接恢复过程(S503a)，若第二小区的信号质量小于第一预设阈值，则终端设备进行小区选择(S503b)。若终端设备选择的新小区为SCG中的小区(例如第三小区)，则终端设备通过选择的新小区执行终端设备和第一小区的连接恢复过程(S504a)。若终端设备选择的新小区为其他网络设备下的小区(例如第四小区)，则终端设备通过第四小区发起重建立请求(S504b)。
可选的，上述第一预设阈值可以是协议预定义的，也可以是终端设备从网络设备接收的，具体的可以是终端设备从当前服务基站(即第一网络设备)接收的。第一预设阈值可以是当前服务基站自己配置的，也可以是当前服务基站从其他基站接收的。
实施本申请实施例，当终端设备检测到MCG发生连接失败时，终端设备基于SCG的测量质量选择是执行MCG快速恢复过程还是小区选择过程，以选择最合适的恢复机制。
上述实施例是以第一网络设备是当前为终端设备提供服务的主基站、第二网络设备是当前为终端设备提供服务的辅基站为例进行的说明。
可选的，本申请实施例也可以适用到切换场景，当原服务网络设备配置终端设备进行切换时，若终端设备检测到切换到目标MCG后发生连接失败时，终端设备可以结合其在目标MCG上的驻留时间以及目标SCG的信号质量来选择是执行目标MCG快速恢复过程还是小区选择过程。其中，目标MCG是指终端设备在切换过程中需要切换到的MCG，目标SCG是指终端设备在切换过程中需要切换到的SCG。本实施例则是以第一网络设备是终端设备当前需要切换至的目标主基站、第二网络设备是终端设备当前需要切换至的目标辅基站为例进行的说明。
具体的，参见图7所示，在上述步骤S501之前，还包括：
S701、终端设备接收第四网络设备发送的第一消息，该第一消息用于指示终端设备由第四网络设备切换至第一网络设备和第二网络设备。
S702、终端设备根据第一消息由第四网络设备切换至第一网络设备和第二网络设备。
也即是说，终端设备之前连接在第四网络设备下，之后通过切换过程切换至第一网络设备和第二网络设备，即终端设备切换后可以配置为目标DC。其中，终端设备切换至第一网络设备，又可以称为终端设备切换至第一网络设备下第一小区(MCG)。终端设备切换至第二网络设备，又可以称为终端设备切换至第二网络设备下第二小区(SCG)。第一消息可以是RRC信令、媒体接入控制(media access control，MAC)控制元素(control element，CE)和下行控制信息(downlink control information，DCI)中的一种或多种的组合。第一消息中包括目标MCG和目标SCG的配置信息，即包括上述第一小区和第二小区的配置信息。
在一种情况下，当终端设备完成切换后，即终端设备在切换至第一网络设备和第二网络设备之后，检测到和目标MCG(即第一小区)之间的连接发生失败，则终端设备可以基于终端设备成功切换至第一网络设备的时刻与第一时刻之间的时长以及SCG的质量来确定是执行小区选择，还是执行MCG快速恢复过程。其中，第一时刻为第一小区发生连接失 败的时刻。例如，若终端设备成功切换至第一网络设备的时刻与第一时刻之间的时长大于或等于第二预设阈值(即终端设备在完成切换后较长时间才检测到UE和目标MCG之间发生连接失败)，则终端设备执行图5所示实施例中的步骤S501及后续可能的步骤。
可选的，若终端设备成功切换至第一网络设备的时刻与第一时刻之间的时长小于第二预设阈值(即终端设备在完成切换后，很快检测到UE和目标MCG之间发生连接失败)，则终端设备进行小区选择。可选的，若终端设备执行小区选择后，选择到的小区还是目标SCG中的小区(例如第三小区)，则终端设备通过第三小区执行目标MCG的快速恢复过程，具体的，可以参考图5所示实施例中的步骤S504a中的描述。可选的，若终端设备执行小区选择后，选择到了不同于SCG的小区(例如第三网络设备中的第四小区)，则终端设备通过新小区发起重建立请求，具体的，可以参考图5所示实施例中的步骤S504b中的描述。
可选的，若终端设备成功切换至所述第一网络设备的时刻与第一时刻之间的时长小于第二预设阈值且第二小区的信号质量小于第一预设阈值，则所述终端设备进行小区选择。
示例性的，比如终端设备完成到目标MCG的切换后，启动定时器，若定时器运行时间小于第二预设阈值T，终端设备认为“很快”检测到终端设备和目标MCG之间发生连接失败。
可选的，第一预设阈值和第二预设阈值可以是协议预定义的，也可以是终端设备从网络设备接收的，具体的可以是终端设备从当前服务基站接收的。第一预设阈值和第二预设阈值可以是当前服务基站自己配置的，也可以是当前服务基站从其他基站接收的。
在另一种情况下，当UE在切换过程中检测到UE和目标MCG之间的连接发生失败(即切换过程中发生了切换失败(HO failure，HOF)，终端设备未成功切换至第一网络设备和第二网络设备)，UE执行小区选择。假设UE选择到目标小区，UE在目标小区执行重建立流程。可以理解的，若目标小区属于目标SCG(即第二小区)中的小区，UE可以执行MCG快速恢复过程。可选的，若终端设备未成功切换至第一网络设备且第二小区的信号质量小于第一预设阈值，则终端设备进行小区选择。
本申请实施例也可以适用到切换场景，当终端设备检测到切换至的目标MCG发生连接失败时，终端设备可以结合其在目标MCG上的驻留时间以及目标SCG的信号质量来选择是执行目标MCG快速恢复过程还是小区选择过程。
实施本申请实施例，针对切换场景，当终端设备检测到切换至的目标MCG发生连接失败时，终端设备可以结合其在目标MCG上的驻留时间以及目标SCG的信号质量来选择是执行目标MCG快速恢复过程还是小区选择过程，以选择最合适的恢复机制，可以改善too early HO或HO to wrong cell的场景下目标MCG发生连接失败带来的数传中断问题，使得在切换场景下的重建立可以尽快恢复。
需要说明的是，上述是以步骤S501、S502、S503a、S503b作为一个实施例进行的说明，在其他可选的实现方式中，上述步骤S501、S502、S503a可以单独作为一个实施例，上述步骤S501、S502、S503b也可以单独作为一个实施例，具体实现过程也可以参考前述实施例中的相关描述，此处不再赘述。
本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的终端 设备及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
可以理解的是，上述方法中，由终端设备实现的方法，也可以由可配置于终端设备的部件(例如芯片、芯片系统或者电路)实现。
本申请实施例可以根据上述方法示例对终端设备等进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图8示出了上述实施例中所涉及的终端设备的一种可能的逻辑结构示意图，终端设备800包括：第一确定单元801、第二确定单元802和第一恢复单元803。终端设备800可以为终端设备或者可配置于终端设备的部件。可选的，终端设备800还可以包括通信单元。示例性的，通信单元用于支持终端设备800执行前述图5至图7所示方法实施例中对应终端设备接收或者发送信息的步骤。第一确定单元801、第二确定单元802和第一恢复单元803，用于支持终端设备800执行前述图5至图7所示方法实施例中对应终端设备相关的处理步骤，例如实现除收发单元功能以外的其他功能等。可选的，该终端设备800还可以包括存储单元，用于存储代码(程序)或者数据。示例性地，
第一确定单元801，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
第二确定单元802，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
第一恢复单元803，用于若所述第二小区的信号质量大于等于第一预设阈值，通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。
在硬件实现上，上述第一确定单元801、第二确定单元802和第一恢复单元803可以为处理器或者处理电路等。通信单元可以为收发器或者收发电路或者接口电路等。存储单元可以为存储器。上述第一确定单元801、第二确定单元802和第一恢复单元803、通信单元和存储单元可以集成在一起，也可以分离。
本申请实施例提供的终端设备800的其他功能及相关实现过程可以参考前述图5至图7所示方法实施例中的相关描述，此处不再赘述。
图9示出了上述实施例中所涉及的终端设备的一种可能的逻辑结构示意图，终端设备900包括：第一确定单元901、第二确定单元902和第一恢复单元903。终端设备900可以为终端设备或者可配置于终端设备的部件。可选的，终端设备900还可以包括通信单元。示例性的，通信单元用于支持终端设备900执行前述图5至图7所示方法实施例中对应终端设备接收或者发送信息的步骤。第一确定单元901、第二确定单元902和选择单元903，用于支持终端设备900执行前述图5至图7所示方法实施例中对应终端设备相关的处理步 骤，例如实现除收发单元功能以外的其他功能等。可选的，该终端设备900还可以包括存储单元，用于存储代码(程序)或者数据。示例性地，
第一确定单元901，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
第二确定单元902，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
选择单元903，用于若所述第二小区的信号质量小于第一预设阈值，进行小区选择。
在硬件实现上，上述第一确定单元901、第二确定单元902和选择单元903可以为处理器或者处理电路等。通信单元可以为收发器或者收发电路或者接口电路等。存储单元可以为存储器。上述第一确定单元901、第二确定单元902和选择单元903、通信单元和存储单元可以集成在一起，也可以分离。
本申请实施例提供的终端设备900的其他功能及相关实现过程可以参考前述图5至图7所示方法实施例中的相关描述，此处不再赘述。
图10所示，为本申请的实施例提供的终端设备的一种可能的硬件结构示意图。终端设备1000用于实现上述方法中终端设备的功能。该终端设备，也可以是终端设备中的装置。其中，该装置可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。终端设备1000包括至少一个处理器1002，用于实现本申请实施例提供的方法中终端设备的功能。示例性地，处理器1002可以确定所述终端设备和第一小区的连接失败，处理器1002还可以确定第二网络设备下的第二小区的信号质量，处理器1002还可以在所述第二小区的信号质量大于等于第一预设阈值时，通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程，具体参见图5至图7所示方法示例中的详细描述，此处不做赘述。
终端设备1000还可以包括至少一个存储器1003，用于存储程序指令和/或数据。存储器1003和处理器1002耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器1002可能和存储器1003协同操作。处理器1002可能执行存储器1003中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
终端设备1000还可以包括通信接口1001，用于通过传输介质和其它设备进行通信，从而用于终端设备1000可以和其它设备进行通信。示例性地，该其它设备可以是网络设备。处理器1002利用通信接口1001收发数据，并用于实现图5至图7对应的实施例中所述的终端设备所执行的方法。通信接口1001可以是收发器、接口、总线、电路或者能够实现收发功能的装置。
本申请实施例中不限定上述通信接口1001、处理器1002以及存储器1003之间的具体连接介质。本申请实施例在图10中以存储器1003、处理器1002以及通信接口1001之间通过总线1004连接，总线在图10中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现 场可编程门阵列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，可以实现或者执行本申请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。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
可以理解的，终端设备1000可以是图1示出的无线通信系统1000中的终端设备1002，可实施为eMTC设备、移动设备，移动台(mobile station)，移动单元(mobile unit)，无线单元，远程单元，用户代理，移动客户端等等。
需要说明的是，图10所示的终端设备1000仅仅是本申请实施例的一种实现方式，实际应用中，终端设备1000还可以包括更多或更少的部件，这里不作限制。关于终端设备1000的具体实现可以参考前述方法实施例中的相关描述，此处不再赘述。
参见图11，图11示出了本申请提供的一种通信芯片的结构示意图。如图11所示，通信芯片1100可包括：处理器1101，以及耦合于处理器1101的一个或多个接口1102。示例性的：
处理器1101可用于读取和执行计算机可读指令。具体实现中，处理器1101可主要包括控制器、运算器和寄存器。示例性的，控制器主要负责指令译码，并为指令对应的操作发出控制信号。运算器主要负责执行定点或浮点算数运算操作、移位操作以及逻辑操作等，也可以执行地址运算和转换。寄存器主要负责保存指令执行过程中临时存放的寄存器操作数和中间操作结果等。具体实现中，处理器1101的硬件架构可以是专用集成电路(application specific integrated circuits，ASIC)架构、无互锁管道阶段架构的微处理器(microprocessor without interlocked piped stages architecture，MIPS)架构、进阶精简指令集机器(advanced RISC machines，ARM)架构或者NP架构等等。处理器1101可以是单核的，也可以是多核的。
示例性的，接口1102可用于输入待处理的数据至处理器1101，并且可以向外输出处理器1101的处理结果。具体实现中，接口1102可以是通用输入输出(general purpose input output，GPIO)接口，可以和多个外围设备(如显示器(LCD)、摄像头(camara)、射频(radio frequency，RF)模块等等)连接。接口1102通过总线1103与处理器1101相连。
一种可能的实现方式中，处理器1101可用于从存储器中调用并执行指令以实现本申请的一个或多个实施例提供的方法在终端设备侧的实现程序或者数据，使得该芯片可以实现前述图5至图7所示的方法。存储器可以和处理器1101集成在一起，也可以通过接口1102与通信芯片1100相耦合，也就是说存储器可以是通信芯片1100的一部分，也可以独立于该通信芯片1100。接口1102可用于输出处理器1101的执行结果。本申请中，接口1102可具体用于输出处理器1101生成的信号。关于本申请的一个或多个实施例提供的方法可参 考前述各个实施例，这里不再赘述。
需要说明的，处理器1101、接口1102各自对应的功能既可以通过硬件设计实现，也可以通过软件设计来实现，还可以通过软硬件结合的方式来实现，这里不作限制。
在本申请的另一实施例中，还提供一种计算机存储介质，计算机存储介质中存储有计算机执行指令，当一个设备(可以是单片机，芯片等)或者处理器可以调用可读存储介质中存储的计算机执行指令，从而使得该设备或者处理器来执行图5至图7所提供的方法中终端设备的步骤。前述的计算机存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的另一实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得设备实施图5至图7所提供的方法中终端设备的步骤。
在本申请的另一实施例中，还提供一种通信系统，该通信系统包括多个设备，该多个设备包括网络设备和终端设备。示例性的，终端设备可以为图8所示的终端设备800或图9所提供的终端设备900或图10所提供的终端设备1000，且用于执行图5至图7所提供的方法中对应终端设备的步骤。
本申请实施例提供的方法中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，SSD)等。
在本申请实施例中，在无逻辑矛盾的前提下，各实施例之间可以相互引用，例如方法实施例之间的方法和/或术语可以相互引用，例如装置实施例之间的功能和/或术语可以相互引用，例如装置实施例和方法实施例之间的功能和/或术语可以相互引用。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (22)

  1. 一种通信方法，其特征在于，包括：
    终端设备确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
    所述终端设备确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
    若所述第二小区的信号质量大于等于第一预设阈值，所述终端设备通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    若所述第二小区的信号质量小于所述第一预设阈值，所述终端设备进行小区选择。
  3. 根据权利要求2所述的方法，其特征在于，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述方法还包括：
    所述终端设备通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
  4. 根据权利要求2所述的方法，其特征在于，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述方法还包括：
    所述终端设备向所述第四小区所属的所述第三网络设备发送重建立请求。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述终端设备确定所述终端设备和第一小区的连接失败，包括：
    所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述终端设备确定第二网络设备下的第二小区的信号质量，包括：
    若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长大于或等于第二预设阈值，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
  6. 一种通信方法，其特征在于，包括：
    终端设备确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
    所述终端设备确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
    若所述第二小区的信号质量小于第一预设阈值，所述终端设备进行小区选择。
  7. 根据权利要求6所述的方法，其特征在于，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述方法还包括：
    所述终端设备通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
  8. 根据权利要求6所述的方法，其特征在于，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述方法还包括：
    所述终端设备向所述第四小区所属的所述第三网络设备发送重建立请求。
  9. 根据权利要求6至8任一项所述的方法，其特征在于，所述终端设备确定所述终端设备和第一小区的连接失败，包括：
    所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述终端设备确定第二网络设备下的第二小区的信号质量，具体为：
    若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长小于第二预设阈值，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
  10. 根据权利要求6至8任一项所述的方法，其特征在于，所述终端设备确定所述终端设备和第一小区的连接失败，包括：
    所述终端设备确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述终端设备确定第二网络设备下的第二小区的信号质量，具体为：
    若所述终端设备在所述第一时刻还未成功切换至所述第一网络设备，则所述终端设备确定所述第二网络设备下的第二小区的信号质量。
  11. 一种终端设备，其特征在于，包括：
    第一确定单元，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
    第二确定单元，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
    第一恢复单元，用于若所述第二小区的信号质量大于等于第一预设阈值，通过所述第二小区执行所述终端设备和所述第一小区的连接恢复过程。
  12. 根据权利要求11所述的终端设备，其特征在于，所述终端设备还包括：
    选择单元，用于若所述第二小区的信号质量小于所述第一预设阈值，进行小区选择。
  13. 根据权利要求12所述的终端设备，其特征在于，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述终端设备还包括：
    第二恢复单元，用于通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
  14. 根据权利要求12所述的终端设备，其特征在于，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述终端设备还包括：
    发送单元，用于向所述第四小区所属的所述第三网络设备发送重建立请求。
  15. 根据权利要求11至14任一项所述的终端设备，其特征在于，
    所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述第二确定单元，具体用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长大于或等于第二预设阈值，则确定所述第二网络设备下的第二小区的信号质量。
  16. 一种终端设备，其特征在于，包括：
    第一确定单元，用于确定所述终端设备和第一小区的连接失败，所述第一小区为第一网络设备下的小区；
    第二确定单元，用于确定第二网络设备下的第二小区的信号质量，所述第一网络设备和所述第二网络设备均为所述终端设备提供通信服务；
    选择单元，用于若所述第二小区的信号质量小于第一预设阈值，进行小区选择。
  17. 根据权利要求16所述的终端设备，其特征在于，若所述终端设备进行小区选择后选择的小区为所述第二网络设备的第三小区，所述终端设备还包括：
    恢复单元，用于通过所述第三小区执行所述终端设备和所述第一小区的连接恢复过程。
  18. 根据权利要求16所述的终端设备，其特征在于，若所述终端设备进行小区选择后选择的小区为第三网络设备的第四小区，所述终端设备还包括：
    发送单元，用于向所述第四小区所属的所述第三网络设备发送重建立请求。
  19. 根据权利要求16至18任一项所述的终端设备，其特征在于，
    所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述第二确定单元，具体用于若所述终端设备成功切换至所述第一网络设备的时刻与所述第一时刻之间的时长小于第二预设阈值，确定所述第二网络设备下的第二小区的信号质量。
  20. 根据权利要求16至18任一项所述的终端设备，其特征在于，
    所述第一确定单元，具体用于确定所述终端设备和所述第一小区的连接失败的时刻为第一时刻；
    所述第二确定单元，具体用于若所述终端设备在所述第一时刻还未成功切换至所述第一网络设备，则确定所述第二网络设备下的第二小区的信号质量。
  21. 一种终端设备，其特征在于，包括处理器和存储器，所述存储器和所述处理器耦合，所述处理器用于实现权利要求1至10任一项所述的方法。
  22. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括指令，当其在计算机上运行时，使得所述计算机执行权利要求1至10任一项所述的方法。
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