CN114270935B - Cell connection method, electronic equipment and storage medium - Google Patents
Cell connection method, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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Abstract
The application discloses a cell connection method, which comprises the following steps: under the condition that the wireless link between the terminal equipment and the target cell fails, the terminal equipment sends first indication information to source network equipment; and the first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell. The application also discloses another cell connection method, electronic equipment and a storage medium.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a cell connection method, an electronic device, and a storage medium.
Background
After a terminal device (UE) is randomly accessed to a target cell, if a radio link failure between the terminal device and the target cell occurs, how the terminal device performs cell connection is a problem to be solved.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present application provide a cell connection method, an electronic device, and a storage medium, where a terminal device can perform cell connection when a radio link with a target cell fails.
In a first aspect, an embodiment of the present application provides a cell connection method, including: under the condition that the wireless link between the terminal equipment and the target cell fails, the terminal equipment sends first indication information to source network equipment; and the first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell.
In a second aspect, an embodiment of the present application provides a cell connection method, including: and under the condition that the wireless link between the terminal equipment and the target cell fails, the terminal equipment performs the cell connection processing according to the state of executing path switching of the target network equipment corresponding to the target cell.
In a third aspect, an embodiment of the present application provides a cell connection method, including: the method comprises the steps that source network equipment receives first indication information sent by terminal equipment, wherein the first indication information is used for indicating that a radio link between the terminal equipment and a target cell fails; and the source network equipment performs cell connection processing based on the first indication information.
In a fourth aspect, an embodiment of the present application provides a cell connection method, including: the method comprises the steps that target network equipment receives fourth indication information sent by source network equipment, wherein the fourth indication information is used for indicating that a wireless link of a target cell corresponding to the target network equipment fails; and the target network equipment performs cell connection processing based on the fourth indication information.
In a fifth aspect, an embodiment of the present application provides a terminal device, including:
A first sending unit configured to send first indication information to a source network device by the terminal device in case of radio link failure between the terminal device and a target cell;
and the first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell.
In a sixth aspect, an embodiment of the present application provides a terminal device, including:
And the first processing unit is configured to perform cell connection processing according to the state of executing path switching by the terminal equipment according to the target network equipment corresponding to the target cell under the condition that the radio link between the terminal equipment and the target cell fails.
In a seventh aspect, an embodiment of the present application provides a source network device, including:
the first receiving unit is configured to receive first indication information sent by the terminal equipment, wherein the first indication information is used for indicating that the wireless link between the terminal equipment and the target cell fails;
and the second processing unit is configured to perform cell connection processing based on the first indication information.
In an eighth aspect, an embodiment of the present application provides a target network device, including:
the second receiving unit is configured to receive fourth indication information sent by the source network equipment, wherein the fourth indication information is used for indicating that the radio link of a target cell corresponding to the target network equipment fails;
and a third processing unit configured to perform processing of cell connection based on the fourth instruction information.
In a ninth aspect, an embodiment of the present application provides a terminal device, including a processor and a memory for storing a computer program capable of running on the processor, where the processor is configured to execute steps of a cell connection method executed by the terminal device when the computer program is run.
In a tenth aspect, an embodiment of the present application provides a source network device, including a processor and a memory for storing a computer program capable of running on the processor, where the processor is configured to execute steps of a cell connection method executed by the source network device when the computer program is run.
In an eleventh aspect, an embodiment of the present application provides a target network device, including a processor and a memory for storing a computer program capable of running on the processor, where the processor is configured to execute steps of a cell connection method executed by the target network device when the computer program is run.
In a twelfth aspect, an embodiment of the present application provides a computer storage medium storing an executable program, where the executable program when executed by a processor implements the cell connection method executed by the terminal device.
In a thirteenth aspect, an embodiment of the present application provides a computer storage medium storing an executable program, where the executable program when executed by a processor implements the cell connection method executed by the source network device.
In a fourteenth aspect, an embodiment of the present application provides a computer storage medium storing an executable program that, when executed by a processor, implements the cell connection method executed by the target network device.
In a fifteenth aspect, an embodiment of the present application provides a chip, including: and a processor for calling and running a computer program from the memory, so that the device mounted with the chip executes the cell connection method executed by the terminal device, the cell connection method executed by the source network device, or the cell connection method executed by the target network device.
In a sixteenth aspect, an embodiment of the present application provides a computer program product, including computer program instructions for causing a computer to execute a cell connection method executed by the above-mentioned terminal device, or a cell connection method executed by the above-mentioned source network device, or a cell connection method executed by the above-mentioned target network device.
In a seventeenth aspect, an embodiment of the present application provides a computer program that causes a computer to execute the cell connection method executed by the terminal device, or the cell connection method executed by the source network device, or the cell connection method executed by the target network device.
The cell connection method, the electronic equipment and the storage medium provided by the embodiment of the application comprise the following steps: under the condition that the wireless link between the terminal equipment and the target cell fails, the terminal equipment sends first indication information to source network equipment; and the first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell. Or the terminal equipment performs cell connection according to the state of executing path switching of the target network equipment corresponding to the target cell. Therefore, the source network device or the employee terminal device can perform corresponding cell connection processing according to whether the target network device executes the path switching request, and unnecessary connection reestablishment process of the terminal device and time delay caused by connection reestablishment are avoided.
Drawings
FIG. 1 is a schematic flow chart of cell switching in an NR system of the present application;
Fig. 2 is a schematic diagram of a communication system according to an embodiment of the present application;
fig. 3 is a schematic diagram of an alternative processing flow of a cell connection method applied to a terminal device according to an embodiment of the present application;
fig. 4 is a schematic diagram of another alternative processing flow of the cell connection method applied to the terminal device according to the embodiment of the present application;
Fig. 5 is a schematic diagram of an alternative process flow of a cell connection method applied to a target network device according to an embodiment of the present application;
Fig. 6 is a schematic diagram of an alternative processing flow of a cell connection method applied to a communication system according to an embodiment of the present application;
fig. 7 is a schematic diagram of another alternative processing flow of the cell connection method applied to the terminal device according to the embodiment of the present application;
fig. 8 is a schematic diagram of another alternative processing flow of the cell connection method applied to the communication system according to the embodiment of the present application;
fig. 9 is a schematic diagram of a composition structure of a terminal device according to an embodiment of the present application;
Fig. 10 is a schematic diagram of another composition structure of a terminal device according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a source network device according to an embodiment of the present application;
fig. 12 is a schematic diagram of a composition structure of a target network device according to an embodiment of the present application;
Fig. 13 is a schematic diagram of a hardware composition structure of an electronic device according to an embodiment of the present application.
Detailed Description
So that the manner in which the features and techniques of the embodiments of the present application can be understood in more detail, a more particular description of the application, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the present application.
Before describing the cell connection method provided by the embodiment of the present application in detail, a brief description of a related art cell handover procedure is provided.
With the pursuit of speed, delay, high-speed mobility, energy efficiency and the diversity and complexity of future life services, the 3GPP international standards organization starts to develop 5G. The main application scenario of 5G is: enhanced mobile ultra-wideband (Enhance Mobile Broadband, eMBB), low latency high reliability communications (Ultra Reliable Low Latency Communications, URLLC), and large scale machine class communications (MASSIVE MACHINE TYPE Communication, mMTC).
EMBB still aims at obtaining multimedia content, services and data by users, and the demand of which is growing very rapidly. On the other hand, eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., where the capability and demand are also quite different, so detailed analysis must be performed in conjunction with a specific deployment scenario. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety guarantee and the like. Typical features of mMTC include: high connection density, small data volume, delay insensitive traffic, low cost and long service life of the module, etc.
Similar to the long term evolution (Long Term Evolution, LTE) system, the New Radio (NR) system supports a handover procedure of a connected terminal device. When a terminal device using a network service moves from one cell to another cell, or due to adjustment of radio transmission traffic load, active operation maintenance, equipment failure, etc., the system transfers the communication link between the terminal device and the original cell to the new cell, i.e., performs a handover procedure, in order to ensure continuity of communication and quality of service.
Taking an Xn interface switching process as an example, a cell switching process applicable to an LTE system and an NR system, as shown in fig. 1, is divided into the following three phases:
stage 1 (including steps 1 to 5), handover preparation: including measurement control and reporting, handover requests, and acknowledgements.
Stage 2 (comprising steps 6 to 8), the handover performs: the terminal device immediately executes the switching process after receiving the switching command, i.e. the terminal device disconnects the source cell and connects with the target cell (e.g. executes random access, sends an RRC switching completion message to the target network device, etc.); the secondary node (SecondaryNode, SN) performs state transition and data forwarding.
Stage 3 (comprising steps 9 to 12), the handover is completed: the target cell performs path switching (PATH SWITCH) with (Acess and Mobility Management Function, AMF) and user plane functions (User Port Function, UPF) releasing the terminal device context of the source network device.
In 3GPP mobility enhancement study of LTE system and NR system, architecture for reducing connection interruption time when terminal equipment performs cell switching comprises the following two kinds of:
One is in the cell switching process, first add the target network equipment as the Secondary Node (SN); converting the target network equipment from SN to Master Node (MN) by role change signaling; and finally releasing the source network equipment, thereby achieving the effect of reducing the connection interruption time during cell switching.
Another method is a dual-activation protocol stack (Dual Active Protocol Stack, DAPS) optimization method for reducing interruption time in a cell switching process, that is, when a terminal device receives a switching command, the terminal device simultaneously maintains protocol stacks of a source cell and a target cell, and initiates random access to target network devices, and after the terminal device successfully accesses the target cell, the target network device initiates a path switching request to a core network element for requesting the core network element to switch a downlink path from the source network device to the target network device. For DAPS handoff, the terminal device will maintain a connection with both the source and target network devices; the terminal equipment only sends uplink data to the target network equipment, and the terminal equipment simultaneously receives downlink data sent by the source network equipment and the target network equipment. Meanwhile, the terminal device maintains radio link monitoring (Radio Link Monitoring, RLM) for the source cell corresponding to the source network device and the target cell corresponding to the target network device. . If the terminal equipment fails in radio link between the terminal equipment and the target cell after the terminal equipment is successfully accessed into the target cell, how the terminal equipment performs cell connection can avoid the problem that needs to be solved in an unnecessary connection reestablishment process.
Wherein the radio link failure includes at least one of: the timer started after the physical layer radio link problem indication expires, the random access procedure fails, and the radio link control (Radio Link Control, RLC) fails.
The present application provides a cell connection method, and the cell connection method of the embodiment of the present application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), general Packet Radio Service (GPRS), LTE frequency division duplex (Frequency Division Duplex, FDD), LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) or 5G systems, etc.
Exemplary, a communication system 100 to which embodiments of the present application are applied is shown in fig. 2. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.
The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. "terminal device" as used herein includes, but is not limited to, a connection via a wireline, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal device arranged to receive/transmit communication signals; and/or an internet of things (Internet of Things, ioT) device. Terminal devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.
Alternatively, direct terminal (D2D) communication may be performed between the terminal devices 120.
Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
Fig. 2 illustrates one network device and two terminal devices by way of example, and the communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited by the embodiments of the present application.
Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.
It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 2 as an example, the communication device may include the network device 110 and the terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be the specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.
An optional processing flow of the cell connection method applied to the terminal device provided by the embodiment of the application, as shown in fig. 3, includes the following steps:
Step S201, in the case that the radio link between the terminal device and the target cell fails, the terminal device sends first indication information to the source network device.
In some embodiments, the first indication information is used to indicate that the radio link of the terminal device and the target cell fails.
In some embodiments, the first indication information includes at least any one of:
A radio resource Control (Radio Resource Control, RRC) message, a (media access Control MEDIA ACCESS Control, MAC) layer Control Element (CE) and an uplink Control indication (Uplink Control Information, UCI).
In the embodiment of the invention, the terminal equipment sends the first indication information to the source network equipment, and the source network equipment sends the first indication information to the target network equipment corresponding to the target cell. In this way, the target network device determines, through the received first indication information, that the radio link between the terminal device and the target cell fails, and the target network device does not send a path switching (PATH SWITCH) request to the core network element.
An optional processing flow of the cell connection method applied to the source network device provided in the embodiment of the present application, as shown in fig. 4, includes the following steps:
in step S301, a source network device receives first indication information sent by a terminal device, where the first indication information is used to indicate that a radio link between the terminal device and a target cell fails.
In some embodiments, the description of the first indication information is the same as the description of the first indication information in step S201, and is not repeated here.
In step S302, the source network device performs a cell connection process based on the first indication information.
In some embodiments, the source network device performs a cell connection according to the state of PATH SWITCH executed by the target network device corresponding to the target cell. Wherein the state of the target network device execution PATH SWITCH includes: whether the target network device has completed PATH SWITCH.
In a specific implementation, in a case that the target network device has executed PATH SWITCH, the source network device sends a path switching request again to the core network element. Optionally, the source network device indicates the radio link failure of the terminal device and the target cell to the core network element at the same time. Wherein the case that the target network device has performed path switching includes: the source network device has received an indication or end identifier END MARKER sent by the core network element to release the terminal device context.
In the specific implementation, under the condition that the target network equipment does not execute PATH SWITCH, the source network equipment sends fourth indication information to the target network equipment; and the fourth indication information is used for indicating the radio link failure between the terminal equipment and the target cell. The case where the target network device does not perform path switching includes: the source network equipment does not receive a path switching completion message sent by a core network element; wherein the path switch complete message may be an indication to release the terminal device context or END MARKER.
In other embodiments, the source network device does not determine the state of the target network device executing PATH SWITCH, but directly sends the fifth indication information to the core network element; the fifth indication information is used for indicating the core network element to stop path switching to the target cell, or the fifth indication information is used for indicating the core network element to switch the downlink to the source cell. And in case that the fifth indication information is used for indicating the core network element to switch the downlink to the source cell, the fifth indication information is PATH SWITCH message.
In the embodiment of the application, the source network equipment determines whether to initiate the path switching request again to the core network element according to whether the target network equipment executes the path switching request, so that unnecessary connection reestablishment process and time delay caused by connection reestablishment are avoided.
An optional processing flow of the cell connection method applied to the target network device provided in the embodiment of the present application, as shown in fig. 5, includes the following steps:
in step S401, the target network device receives fourth indication information sent by the source network device, where the fourth indication information is used to indicate that the radio link of the target cell corresponding to the target network device by the terminal device fails.
In step S402, the target network device performs a cell connection process based on the fourth indication information.
In some embodiments, the target network device performs a cell connection process according to a state that the target network device performs path switching. Wherein the state of the target network device execution PATH SWITCH includes: whether the target network device has completed PATH SWITCH.
In a specific implementation, the target network device does not send a path switching request (PATH SWITCH request) to the core network element if the target network device does not send a path switching request to the core network element.
In a specific implementation, in a case that the target network device has sent a path switching request to a core network element, the target network device sends a path switching cancellation request (PATH SWITCH cancelation request) to the core network element, or the target network device sends a state that the target network device performs path switching to the source network device.
In the embodiment of the application, the target network equipment determines whether to initiate the path switching request again to the core network element according to whether to execute the path switching request or not, thereby avoiding unnecessary connection reestablishing process and time delay caused by connection reestablishment.
The optional processing flow of the cell connection method applied to the communication system formed by the terminal device, the source network device and the target network device provided by the embodiment of the application is shown in fig. 6, after the terminal device is successfully randomly accessed to the target cell corresponding to the target network device, the terminal device performs downlink data transmission between the core network element and the source network device, and the target network device performs uplink data transmission and downlink data transmission between the core network element and the terminal device. Wherein, the core network element may include: a mobility management function (Mobility Management Function, AMF) entity and/or a user plane function (User plane Function, UPF) entity; the core network element may further comprise a Mobility management entity (Mobility MANAGEMENT ENTITY, MME). In the case that the radio link between the terminal equipment and the target cell fails, the cell connection method provided by the embodiment of the application comprises the following steps:
In step S501, the terminal device sends first indication information to the source network device.
After receiving the first indication information, the source network device performs either step S502 or step S503.
In step S502, the source network device determines whether the terminal device has completed PATH SWITCH.
In case the source network device has received an indication of releasing the terminal device context or END MARKER sent by the core network element, determining that the target network device has performed PATH SWITCH; at this time, the source network device sends a path switching request to the core network element again. Optionally, the source network device indicates the radio link failure of the terminal device and the target cell to the core network element at the same time.
Under the condition that the source network equipment does not receive the path switching completion message sent by the core network element, the source network equipment determines that the target network equipment does not execute PATH SWITCH; at this time, the source network device sends fourth indication information to the target network device; the fourth indication information is used for indicating that the radio link between the terminal equipment and the target cell fails; wherein the path switch complete message may be an indication to release the terminal device context or END MARKER.
After receiving the fourth indication information, the target network device does not send PATH SWITCH request to the core network element under the condition that the target network device does not send a path switching request to the core network element. In case the target network device has sent PATH SWITCH a request to a core network element, the target network device sends PATH SWITCH cancelation request to the core network element or the target network device sends to the source network device the state that the target network device performs path switching.
Step S503, the source network device does not determine the state of the target network device executing PATH SWITCH, but directly sends fifth indication information to the core network element; the fifth indication information is used for indicating the core network element to stop path switching to the target cell, or the fifth indication information is used for indicating the core network element to switch the downlink to the source cell. In the case that the fifth indication information is used to instruct the core network element to switch the downlink to the source cell, the fifth indication information is PATH SWITCH message; at this time, the core network element may be an AMF.
An alternative process flow of the cell connection method applied to the terminal device provided in the embodiment of the present application, as shown in fig. 7, includes the following steps:
In step S601, the terminal device performs the cell connection according to the state of performing path switching on the target network device corresponding to the target cell.
In some embodiments, the terminal device needs to determine whether the target network device has performed a path switch. In the specific implementation, the terminal equipment receives second indication information sent by the target network equipment; and determining whether the target network equipment has performed path switching according to the second indication information. Wherein the second indication information is used for indicating at least one of the following: the target network device has performed path switching, and time information for the target network device to perform path switching. The time information for the target network device to perform the path switch may include when the target network device sends PATH SWITCH to the core network element.
The second indication information can be transmitted while the target network device initiates cell switching to a core network element; or the second indication information may be transmitted before the target network device initiates cell handover to a core network element; or the second indication information may be transmitted after the target network device initiates a cell handover to a core network element.
In one embodiment, the terminal device initiates a connection re-establishment procedure in case the target network device has performed a path switch. The terminal equipment can initiate a connection reestablishment process to a source cell or a target cell. Optionally, the terminal device sends third indication information to the source network device, where the third indication information is used to instruct the source network device to send the path switching request again.
In another embodiment, in the case that the target network device does not start performing path switching, the terminal device resides in a source cell and releases the protocol stack of the target cell. Optionally, the terminal device sends third indication information to the source network device, where the third indication information is used to indicate that the radio link between the terminal device and the target cell fails. And the source network equipment forwards the third indication information to the target network equipment, so that the target network equipment is prevented from sending a path switching request to a core network element.
In the embodiment of the application, the terminal equipment determines whether to initiate the connection reestablishment process according to whether the target network equipment executes the path switching request, so that unnecessary connection reestablishment process initiated by the terminal equipment and time delay caused by connection reestablishment are avoided.
In another optional processing flow of the cell connection method applied to the communication system formed by the terminal device, the source network device and the target network device provided by the embodiment of the application, as shown in fig. 8, after the terminal device is successfully randomly accessed to the target cell corresponding to the target network device, the terminal device performs downlink data transmission between the core network element and the source network device, and the target network device performs uplink data transmission and downlink data transmission between the core network element and the terminal device. Wherein the core network element comprises: an AMF entity and/or a UPF entity. In case of radio link failure between the terminal equipment and the target cell, the cell connection method applied to the terminal equipment provided by the embodiment of the application comprises the following steps:
Step S801, where the target network device does not perform path switching, the terminal device resides in a source cell and releases a protocol stack of the target cell.
Or step S802, in the case that the target network device has performed path switching, the terminal device initiates a connection reestablishment procedure.
In step S803, the terminal device sends third indication information to the source network device.
Wherein, in the case that the terminal device is executing step S801, the third indication information is used to indicate that the radio link between the terminal device and the target cell fails; and the source network equipment forwards the third indication information to the target network equipment, so that the target network equipment is prevented from sending a path switching request to the core network element.
The terminal device performs step S802, where the third indication information is used to instruct the source network device to send a path switching request again.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
In order to implement the cell connection method, an embodiment of the present application provides a terminal device, where a composition structure of the terminal device 900, as shown in fig. 9, includes:
A first sending unit 901, configured to send, by the terminal device, first indication information to a source network device in a case where a radio link between the terminal device and a target cell fails;
and the first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell.
In some embodiments, the first indication information includes at least any one of:
RRC message, MAC CE, and UCI.
In order to implement the cell connection method, an embodiment of the present application provides another terminal device, where a composition structure of the terminal device 1000, as shown in fig. 10, includes:
The first processing unit 1001 is configured to perform, when the radio link between the terminal device and the target cell fails, processing of cell connection according to a state that the terminal device performs path switching on a target network device corresponding to the target cell.
In some embodiments, the first processing unit 1001 is further configured to determine whether the target network device has performed a path switch.
In some embodiments, the first processing unit 1001 is configured to receive second instruction information sent by the target network device; and determining whether the target network equipment has performed path switching according to the second indication information.
In some embodiments, the second indication information is used to indicate at least one of: the target network device having performed a path switch; and the target network equipment executes the time information of path switching.
In some embodiments, the second indication information is transmitted while the target network device initiates a cell handover to a core network element;
Or the second indication information is transmitted before the target network equipment initiates cell switching to a core network element;
or the second indication information is transmitted after the target network equipment initiates cell switching to a core network element.
In some embodiments, the first processing unit 1001 is configured to initiate a connection re-establishment procedure if the target network device has performed a path switch.
In some embodiments, the first processing unit 1001 is configured to reside in a source cell and release a protocol stack of the target cell if the target network device does not perform path switching.
In some embodiments, the terminal device further comprises:
a second transmitting unit 1002 configured to transmit third indication information to the source network device;
The third indication information is used for indicating the source network equipment to send a path switching request again, or the third indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
In order to implement the above cell connection method, an embodiment of the present application provides a source network device, where a composition structure of the source network device 1100, as shown in fig. 11, includes:
A first receiving unit 1101 configured to receive first indication information sent by a terminal device, where the first indication information is used to indicate that a radio link between the terminal device and a target cell fails;
the second processing unit 1102 is configured to perform a cell connection process based on the first instruction information.
In some embodiments, the second processing unit 1102 is configured to perform a process of cell connection according to a state that the target network device corresponding to the target cell performs path switching.
In some embodiments, the second processing unit 1102 is configured to send a path switching request to the core network element again in case the target network device has performed a path switching.
In some embodiments, the case where the target network device has performed path switching includes:
the source network device has received an indication or END MARKER sent by the core network element to release the terminal device context.
In some embodiments, the second processing unit 1102 is configured to send fourth indication information to the target network device if the target network device does not perform path switching;
And the fourth indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
In some embodiments, the case where the target network device does not perform path switching includes:
And the source network equipment does not receive the path switching completion message sent by the core network element.
In some embodiments, the second processing unit 1102 is configured to send fifth indication information to a core network element;
The fifth indication information is used for indicating the core network element to stop path switching to the target cell, or the fifth indication information is used for indicating the core network element to switch the downlink to the source cell.
In some embodiments, the first indication information includes at least any one of:
RRC message, MAC CE, and UCI.
In order to implement the above cell connection method, an embodiment of the present application provides a target network device, where a composition structure of the target network device 1200, as shown in fig. 12, includes:
a second receiving unit 1201, configured to receive fourth indication information sent by a source network device, where the fourth indication information is used to indicate that a radio link of a target cell corresponding to the target network device by a terminal device fails;
And a third processing unit 1202 configured to perform processing of cell connection based on the fourth instruction information.
In some embodiments, the third processing unit 1202 is configured to perform processing of cell connection according to a state that the target network device performs path switching.
In some embodiments, the third processing unit 1202 is configured to not send a path switching request to a core network element if the target network device does not send a path switching request to the core network element.
In some embodiments, the third processing unit 1202 is configured to send a path switch cancel request to a core network element or send a state that the target network device performs path switching to the source network device, where the target network device has sent a path switch request to the core network element.
The embodiment of the application also provides the terminal equipment, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the cell connection method executed by the terminal equipment when the computer program runs.
The embodiment of the application also provides source network equipment, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the cell connection method executed by the source network equipment when the computer program runs.
The embodiment of the application also provides the target network equipment, which comprises a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is used for executing the steps of the cell connection method executed by the target network equipment when the computer program runs.
Fig. 13 is a schematic diagram of a hardware composition structure of an electronic device (a terminal device, a source network device, and a target network device) according to an embodiment of the present application, where an electronic device 700 includes: at least one processor 701, memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together by a bus system 705. It is appreciated that the bus system 705 is used to enable connected communications between these components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration, the various buses are labeled as bus system 705 in fig. 13.
It is to be appreciated that the memory 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Wherein the nonvolatile Memory may be ROM, programmable read-Only Memory (PROM, programmable Read-Only Memory), erasable programmable read-Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable read-Only Memory (EEPROM, ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk-Only (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory 702 described in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.
The memory 702 in embodiments of the application is used to store various types of data to support the operation of the electronic device 700. Examples of such data include: any computer program for operating on the electronic device 700, such as application 7022. A program for implementing the method of the embodiment of the present application may be contained in the application program 7022.
The method disclosed in the above embodiment of the present application may be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 701 or by instructions in the form of software. The Processor 701 may be a general purpose Processor, a digital signal Processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the application can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium in a memory 702. The processor 701 reads information in the memory 702 and, in combination with its hardware, performs the steps of the method as described above.
In an exemplary embodiment, the electronic device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, programmable logic devices (PLDs, programmable Logic Device), complex programmable logic devices (CPLDs, complex Programmable Logic Device), FPGAs, general purpose processors, controllers, MCUs, MPUs, or other electronic elements for performing the aforementioned methods.
The embodiment of the application also provides a computer storage medium for storing the executable program.
Optionally, the computer storage medium may be applied to the terminal device in the embodiment of the present application, and the executable program makes the computer execute the corresponding flow in each method in the embodiment of the present application, which is not described herein for brevity.
Optionally, the computer storage medium may be applied to the source network device in the embodiment of the present application, and the executable program causes a computer to execute corresponding flows in the methods in the embodiments of the present application, which are not described herein for brevity.
Optionally, the computer storage medium may be applied to the target network device in the embodiment of the present application, and the executable program causes a computer to execute corresponding flows in the methods in the embodiments of the present application, which are not described herein for brevity.
The embodiment of the application provides a chip, which comprises: and a processor for calling and running a computer program from the memory, so that the device mounted with the chip executes the cell connection method executed by the terminal device, the cell connection method executed by the source network device, or the cell connection method executed by the target network device.
The embodiment of the application provides a computer program product, which comprises computer program instructions, wherein the computer program instructions enable a computer to execute a cell connection method executed by the terminal equipment, or a cell connection method executed by the source network equipment, or a cell connection method executed by the target network equipment.
The embodiment of the application provides a computer program, which enables a computer to execute a cell connection method executed by the terminal equipment, or a cell connection method executed by the source network equipment, or a cell connection method executed by the target network equipment.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is not intended to limit the scope of the application, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the application.
Claims (33)
1. A method of cell connection, the method comprising:
Under the condition that the wireless link between the terminal equipment and the target cell fails, the terminal equipment sends first indication information to source network equipment;
The first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell;
The terminal equipment performs cell connection according to the state of executing path switching of the target network equipment corresponding to the target cell;
The terminal equipment determines whether the target network equipment has executed path switching, and initiates a connection reestablishment process under the condition that the target network equipment has executed path switching; and under the condition that the target network equipment does not execute path switching, the terminal equipment resides in a source cell and releases a protocol stack of the target cell.
2. The method of claim 1, wherein the first indication information includes at least any one of:
A radio resource control, RRC, message;
A media access control layer control unit (MAC CE);
Uplink control indicates UCI.
3. The method of claim 1, wherein the terminal device determining whether the target network device has performed path switching comprises:
the terminal equipment receives second indication information sent by the target network equipment;
and the terminal equipment determines whether the target network equipment has performed path switching according to the second indication information.
4. A method according to claim 3, wherein the second indication information is used to indicate at least one of:
The target network device having performed a path switch;
and the target network equipment executes the time information of path switching.
5. A method according to claim 3 or 4, wherein the second indication information is transmitted at the same time as the target network device initiates a cell handover to a core network element;
Or the second indication information is transmitted before the target network equipment initiates cell switching to a core network element;
or the second indication information is transmitted after the target network equipment initiates cell switching to a core network element.
6. The method of any one of claims 1 to 4, wherein the method further comprises:
The terminal equipment sends third indication information to the source network equipment;
The third indication information is used for indicating the source network equipment to send a path switching request again, or the third indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
7. A method of cell connection, the method comprising:
The method comprises the steps that source network equipment receives first indication information sent by terminal equipment, wherein the first indication information is used for indicating that a radio link between the terminal equipment and a target cell fails;
The source network equipment performs cell connection processing based on the first indication information;
The processing of the cell connection by the source network device based on the first indication information includes:
the source network equipment performs cell connection according to the state of path switching executed by the target network equipment corresponding to the target cell;
In the case that the target network device has performed path switching, the source network device sends a path switching request to the core network element again;
The source network equipment sends fourth indication information to the target network equipment under the condition that the target network equipment does not execute path switching; and the fourth indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
8. The method of claim 7, wherein the case where the target network device has performed path switching comprises:
The source network device has received an indication or end identifier END MARKER sent by the core network element to release the terminal device context.
9. The method of claim 7, wherein the target network device not performing path switching comprises:
And the source network equipment does not receive the path switching completion message sent by the core network element.
10. The method of claim 7, wherein the processing of the cell connection by the source network device based on the first indication information comprises:
the source network equipment sends fifth indication information to a core network element;
The fifth indication information is used for indicating the core network element to stop path switching to the target cell, or the fifth indication information is used for indicating the core network element to switch the downlink to the source cell.
11. The method according to any one of claims 7 to 10, wherein the first indication information comprises at least any one of:
A radio resource control, RRC, message;
A media access control layer control unit (MAC CE);
Uplink control indicates UCI.
12. A method of cell connection, the method comprising:
The method comprises the steps that target network equipment receives fourth indication information sent by source network equipment, wherein the fourth indication information is used for indicating that a wireless link of a target cell corresponding to the target network equipment fails;
The target network equipment performs cell connection processing based on the fourth indication information;
The processing of the target network device for performing cell connection based on the fourth indication information includes:
The target network equipment performs cell connection processing according to the state of the target network equipment for executing path switching;
under the condition that the target network equipment does not send a path switching request to a core network element, the target network equipment does not send the path switching request to the core network element;
And under the condition that the target network equipment sends a path switching request to a core network element, the target network equipment sends a path switching cancellation request to the core network element, or the target network equipment sends a state that the target network equipment executes path switching to the source network equipment.
13. A terminal device, the terminal device comprising:
A first sending unit configured to send first indication information to a source network device by the terminal device in case of radio link failure between the terminal device and a target cell;
The first indication information is sent to target network equipment corresponding to the target cell through the source network equipment and is used for indicating the radio link failure between the terminal equipment and the target cell;
The first processing unit is configured to perform cell connection processing according to the state of executing path switching of the target network equipment corresponding to the target cell; determining whether the target network device has performed path switching, and initiating a connection reestablishment process when the target network device has performed path switching; and if the target network equipment does not execute path switching, residing in a source cell and releasing a protocol stack of the target cell.
14. The terminal device of claim 13, wherein the first indication information includes at least any one of:
A radio resource control, RRC, message;
A media access control layer control unit (MAC CE);
Uplink control indicates UCI.
15. The terminal device of claim 13, wherein the first processing unit is configured to receive second indication information sent by the target network device;
And determining whether the target network equipment has performed path switching according to the second indication information.
16. The terminal device of claim 15, wherein the second indication information is used to indicate at least one of:
The target network device having performed a path switch;
and the target network equipment executes the time information of path switching.
17. The terminal device according to claim 15 or 16, wherein the second indication information is transmitted at the same time as the target network device initiates a cell handover to a core network element;
Or the second indication information is transmitted before the target network equipment initiates cell switching to a core network element;
or the second indication information is transmitted after the target network equipment initiates cell switching to a core network element.
18. The terminal device according to any of claims 13 to 16, wherein the terminal device further comprises:
a second transmitting unit configured to transmit third indication information to the source network device;
The third indication information is used for indicating the source network equipment to send a path switching request again, or the third indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
19. A source network device, the source network device comprising:
the first receiving unit is configured to receive first indication information sent by the terminal equipment, wherein the first indication information is used for indicating that the wireless link between the terminal equipment and the target cell fails;
A second processing unit configured to perform processing of cell connection based on the first instruction information;
The second processing unit is configured to perform cell connection according to the state of executing path switching of the target network device corresponding to the target cell; under the condition that the target network equipment has executed path switching, sending a path switching request to the core network element again; transmitting fourth indication information to the target network equipment under the condition that the target network equipment does not execute path switching; and the fourth indication information is used for indicating the radio link failure between the terminal equipment and the target cell.
20. The source network device of claim 19, wherein the case where the target network device has performed path switching comprises:
The source network device has received an indication or end identifier END MARKER sent by the core network element to release the terminal device context.
21. The source network device of claim 19, wherein the target network device does not perform path switching, comprising:
And the source network equipment does not receive the path switching completion message sent by the core network element.
22. The source network device of claim 19, wherein the second processing unit is configured to send fifth indication information to a core network element;
The fifth indication information is used for indicating the core network element to stop path switching to the target cell, or the fifth indication information is used for indicating the core network element to switch the downlink to the source cell.
23. The source network device of any of claims 19 to 22, wherein the first indication information comprises at least any one of:
A radio resource control, RRC, message;
A media access control layer control unit (MAC CE);
Uplink control indicates UCI.
24. A target network device, the target network device comprising:
the second receiving unit is configured to receive fourth indication information sent by the source network equipment, wherein the fourth indication information is used for indicating that the radio link of a target cell corresponding to the target network equipment fails;
a third processing unit configured to perform processing of cell connection based on the fourth instruction information; according to the state of executing path switching of the target network equipment, carrying out cell connection processing; under the condition that the target network equipment does not send a path switching request to a core network element, the path switching request is not sent to the core network element; and under the condition that the target network equipment sends a path switching request to a core network element, sending a path switching cancellation request to the core network element or sending a state that the target network equipment executes path switching to the source network equipment.
25. A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,
The processor is configured to execute the steps of the cell connection method of any of claims 1 to 6 when the computer program is run.
26. A source network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,
The processor being adapted to perform the steps of the cell connection method of any of claims 7 to 11 when the computer program is run.
27. A target network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,
The processor is configured to execute the steps of the cell connection method of claim 12 when the computer program is run.
28. A computer storage medium storing an executable program which, when executed by a processor, implements the cell connection method of any one of claims 1 to 6.
29. A computer storage medium storing an executable program which, when executed by a processor, implements the cell connection method of any one of claims 7 to 11.
30. A computer storage medium storing an executable program which, when executed by a processor, implements the cell connection method of claim 12.
31. A chip, comprising: processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the cell connection method according to any one of claims 1 to 6.
32. A chip, comprising: processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the cell connection method according to any of claims 7 to 11.
33. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the cell connection method according to claim 12.
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| CN114339914A (en) * | 2021-12-31 | 2022-04-12 | 哲库科技(北京)有限公司 | Cell switching method, device, network equipment and storage medium |
| CN116801292A (en) * | 2022-03-18 | 2023-09-22 | 华为技术有限公司 | Method and device for processing abnormal event |
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| CN102958116A (en) * | 2011-08-25 | 2013-03-06 | 华为技术有限公司 | Control parameter regulating method, terminal, base station and system |
| CN106376038A (en) * | 2011-08-25 | 2017-02-01 | 华为技术有限公司 | Control parameter regulating method, terminal, base station and system |
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