Mobility management method, terminal and network side device

Abstract

This application discloses a mobility management method, a terminal, and a network-side device, belonging to the field of wireless communication technology. One embodiment of the mobility management method includes: a terminal acquiring target configuration information, wherein the target configuration information includes time information of multiple candidate cells; and the terminal performing a cell selection process and / or a connection reconstruction process based on the target configuration information.

Description

Technical Field

[0001] This application belongs to the field of wireless communication technology, specifically relating to a mobility management method, a terminal, and a network-side device. Background Technology

[0002] If a Radio Link Failure (RLF), Normal Handover Failure, or Conditional Handover (CHO) Failure occurs, a Radio Resource Control (RRC) connection re-establishment procedure will be triggered. During the RRC connection re-establishment procedure, cell selection is required. If the suitable cell selected by the terminal (UE) is a candidate cell configured for conditional handover by the network, and if the network is configured with attemptCondReconfig=true, the UE applies the conditional reconfiguration of that cell and attempts to execute the CHO. Otherwise, the UE initiates the transmission of an RRC Reestablishment Request message.

[0003] However, after switching to a suitable cell in the existing cell selection process, there may be a situation where the suitable cell selected by the UE will soon stop providing service, causing CHO to fail or requiring another handover soon. Summary of the Invention

[0004] This application provides a mobility management method, a terminal, and a network-side device, which can solve the problem of connection reconstruction failure caused by the terminal selecting a cell that is about to cease service.

[0005] In a first aspect, a mobility management method is provided, comprising: a terminal acquiring target configuration information, wherein the target configuration information includes time information of multiple candidate cells; and the terminal performing a cell selection process and / or a connection reconstruction process based on the target configuration information.

[0006] Secondly, a mobility management device is provided, comprising: a first acquisition module for acquiring target configuration information, wherein the target configuration information includes time information of multiple candidate cells; and an execution module for the terminal to perform a cell selection process and / or a connection reconstruction process based on the target configuration information.

[0007] Thirdly, a mobility management method is provided, comprising: a network-side device sending target configuration information to a terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructing the terminal to perform a connection reconstruction process and / or a cell selection process based on the time information.

[0008] Fourthly, a mobility management device is provided, comprising: a second acquisition module, configured to acquire target configuration information of a terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructs the terminal to perform a connection reconstruction process and / or a cell selection process based on the time information; and a transmission module, configured to transmit the target configuration information to the terminal.

[0009] Fifthly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0010] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to communicate with a network-side device.

[0011] In a seventh aspect, a network-side device is provided, the network-side device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method as described in the third aspect.

[0012] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the third aspect, and the communication interface is used to communicate with a terminal.

[0013] A ninth aspect provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the third aspect.

[0014] In a tenth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the third aspect.

[0015] Eleventhly, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the third aspect.

[0016] In this embodiment, the terminal obtains target configuration information, which includes time information of multiple candidate cells. Based on the target configuration information, the terminal performs a cell selection process and / or a connection reconstruction process. This allows the time information of the cells to be considered during the cell selection process and / or the connection reconstruction process, thus avoiding connection reconstruction failure caused by the selected target cell ceasing service. Attached Figure Description

[0017] Figure 1 This diagram illustrates a wireless communication system to which embodiments of this application may be applied;

[0018] Figure 2 This illustration shows a flowchart of a mobility management method provided in an embodiment of this application;

[0019] Figure 3 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application;

[0020] Figure 4 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application;

[0021] Figure 5 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application;

[0022] Figure 6 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application;

[0023] Figure 7 This diagram illustrates a structural representation of a mobility management device provided in an embodiment of this application.

[0024] Figure 8 This invention provides another structural diagram of the mobility management device according to an embodiment of the present application.

[0025] Figure 9 This illustration shows a structural diagram of a communication device provided in an embodiment of this application;

[0026] Figure 10 This illustration shows a hardware structure diagram of a terminal provided in an embodiment of this application;

[0027] Figure 11 This diagram illustrates the hardware structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0031] Figure 1This diagram illustrates a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0032] The mobility management solution provided in this application will be described in detail below with reference to the accompanying drawings, through some embodiments and application scenarios.

[0033] Figure 2 This diagram illustrates a flowchart of a mobility management method according to an embodiment of this application. The method 200 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. Figure 2 As shown, the method may include the following steps.

[0034] S210, the terminal obtains target configuration information, wherein the target configuration information includes time information of multiple candidate cells.

[0035] In this embodiment, the terminal can obtain target configuration information through dedicated signaling. For example, it can obtain target configuration information through RRCReconfiguration signaling.

[0036] S212, the terminal performs a cell selection process and / or a connection reconstruction process based on the target configuration information.

[0037] Through a series of studies, the applicant discovered that related technologies do not consider cell time information, such as the time when the cell starts providing service and / or the time when it stops providing service. Since satellite cells are mobile, the suitable cell selected by the UE may soon cease service, leading to CHO failure or the need for a quick handover. Similarly, if the suitable cell selected by the UE is not a candidate cell configured by the network or the network does not have attemptCondReconfig configured, the UE initiates the transmission of the RRCReestablishmentRequest message. Again, without considering cell time information, the suitable cell selected by the UE may soon cease service, resulting in reconstruction failure.

[0038] Therefore, in this embodiment of the application, by considering the time information of the cell during the cell selection process and / or the connection reconstruction process, the connection reconstruction failure problem caused by the selected target cell ceasing service is avoided, thereby improving the success rate and stability of connection reconstruction.

[0039] In one possible implementation, the terminal performs a cell selection process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the first target cell, the terminal preferentially selects the first target cell during the cell selection process. The cell selection process can be an idle or inactive cell selection process, or a connected cell selection process, such as cell selection during a connection reconstruction process.

[0040] In one possible implementation, the terminal performs a connection reconstruction process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the second target cell, the terminal applies conditional reconfiguration of the second target cell during the connection reconstruction process, wherein the first target cell is one of the plurality of candidate cells, and the second target cell is one of the plurality of candidate cells.

[0041] In one possible implementation, the target configuration information may include, but is not limited to, at least one of the following:

[0042] (1) First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells.

[0043] (2) Second configuration information, wherein the second configuration information is used to indicate that, under the condition that the time information of the first target candidate cell indicates the time period at the current time, the first target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration, wherein the first target candidate cell is the candidate cell selected during the terminal connection reconstruction process.

[0044] For example, the second configuration information is used to indicate that during the connection reconstruction process, if the selected cell is a candidate cell that meets the conditions for handover, and the current time is within the time period indicated by the time information of the selected cell, then the UE should perform conditional reconfiguration of the selected cell. Optionally, the selected cell can be the first cell selection after a failure, where the failure includes RLF, handover failure, and CHO failure. For example, the second configuration information is attemptCondReconfig=true.

[0045] (3) First event, wherein the first event indicates that during the connection reconstruction process, the terminal applies the conditional reconfiguration of the second target cell when the current time is within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time after the fifth time, and the time before the sixth time.

[0046] In the embodiments of this application, the first event is configured based on each cell, that is, each cell is configured with a first event. For example, the first event of each cell can be configured based on the service time of each cell.

[0047] (4) Second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

[0048] In the embodiments of this application, the second event is configured based on each cell, that is, each cell is configured with a second event. For example, the second event of each cell can be configured based on the service time of each cell.

[0049] It should be noted that in the above possible implementations, the network-side device can send the first configuration information, the second configuration information, the first event, and the second event using the same dedicated signaling. For example, it can send the first configuration information, the second configuration information, the first event, and the second event using the same dedicated signaling. Alternatively, the network-side device can also send the first configuration information, the second configuration information, the first event, and the second event using different dedicated signaling. For example, it can send the first configuration information, the second configuration information, the first event, and the second event using four separate dedicated signaling messages.

[0050] In the above possible implementations, the first configuration information may include, but is not limited to, at least one of the following:

[0051] (1) Multiple candidate cells, wherein the multiple candidate cells are conditional reconfiguration candidate cells for conditional handover; that is, the first configuration information includes conditional reconfiguration information of multiple candidate cells for conditional handover.

[0052] (2) A third event for each of the candidate cells, wherein the third event is used to trigger a conditional handover, and the third event instructs the terminal to perform a conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met. The second target candidate cell is one of the multiple candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time.

[0053] For example, in non-terrestrial networks (NTNs), considering the large propagation delay in NTNs, Callable Homing (CHO) can be introduced to improve handover robustness. Since satellites are far from the ground, the Reference Signal Received Power (RSRP) / Reference Signal Received Quality (RSRQ) measured by the UE for different NTN cells may be very close. Furthermore, since satellite motion is predictable, CHOs in NTNs can introduce new triggering conditions, such as time-triggered events (i.e., the third event mentioned above). For each candidate cell, if other execution conditions (i.e., the fourth event) are met, the UE must execute the CHO within the time period [t1, t2].

[0054] (3) The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

[0055] For example, after deciding to perform a CHO handover, the source base station sends handover request messages to two or more potential target base stations and receives handover request response messages. Based on the handover response messages, it generates conditional handover reconfiguration signaling, which includes the configurations of two or more candidate target cells and contains an event that triggers the conditional handover (i.e., the fourth event). After receiving the conditional reconfiguration signaling, the UE begins evaluating the conditional handover triggering event. When any candidate target cell meets the event that triggers the conditional handover, the UE treats that candidate cell as the triggering cell, applies the conditional reconfiguration of that triggering cell, detaches from the source cell, synchronizes access to that triggering cell, and sends a CHO handover complete message to that triggering cell.

[0056] It is worth noting that the fourth event is any event other than the third event.

[0057] The fourth event may include at least one of the following:

[0058] (1) Triggering events based on signal strength and / or signal quality, i.e., triggering events related to signal strength and / or signal quality.

[0059] (2) Location-based triggering events, i.e., location-related triggering events.

[0060] In one possible implementation, when the current time falls within the time period indicated by the time information of the second target cell, the terminal applies the conditional configuration of the second target cell during the connection re-establishment process. This includes: if the target configuration information includes the second configuration information, the cell selected by the terminal during the connection re-establishment process is the third target candidate cell among the plurality of candidate cells, and the current time falls within the time period indicated by the time information of the third target candidate cell, then the third target candidate cell is used as the second target cell, and the conditional reconfiguration of the second target cell is applied. In other words, in this possible implementation, if the target configuration information includes the second configuration information, the cell selected by the terminal during the connection re-establishment process is one of the plurality of candidate cells configured on the network side, and the current time falls within the time period indicated by the time information of the selected cell, the conditional reconfiguration of the selected cell is applied to attempt to execute the CHO again. This ensures that the current time falls within the time period indicated by the time information of the cell undergoing conditional reconfiguration, increasing the probability of a successful second conditional handover.

[0061] In another possible implementation, if the target configuration information does not include the second configuration information, or the current time is not within the time period indicated by the time information of the third target candidate cell, or the cell selected during the connection reconstruction process is not one of the multiple candidate cells, then the process of initiating a connection establishment request is executed. That is, if the target configuration information does not include the second configuration information, or the cell selected during the connection reconstruction process is not one of the multiple candidate cells, or the current time is not within the time period indicated by the time information of the selected cell, then the terminal executes the process of initiating the transmission of an RRC Reestablishment Request message.

[0062] In one possible implementation, the current time within the time period indicated by the time information of the second target cell includes one of the following:

[0063] (1) The current time has reached the first time of the second target cell and has not yet exceeded the second time of the second target cell.

[0064] For example, if the network-side device configures absolute times t1 and t2 for the time event triggered by the conditional handover of the second target cell, where the first time is t1 and the second time is t2, then during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between t1 and t2.

[0065] For example, if the network-side device configures an absolute time t3 and offset1 for the time event triggered by the conditional handover of the second target cell, where the first time is t3 and the second time is t3+offset1, then during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between t3 and t3+offset1.

[0066] For example, the network-side device configures offset2 and absolute time t4 for the time event triggered by the conditional handover of the second target cell. The first time is time T1 after offset2 time lengths after receiving the conditional reconfiguration, and the second time is t4. Then, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between time T1 and t4.

[0067] Absolute time includes: Coordinated Universal Time (UTC), Daylight Saving Time (DST), Global Positioning System (GPS) time, and local time.

[0068] For example, the network-side device configures Timer 1 and Timer 2 for the time event triggered by the conditional handover of the second target cell. After receiving the conditional reconfiguration, Timer 1 is started. Timer 2 is started when Timer 1 times out. The first time is the time when Timer 1 times out, and the second time is the time when Timer 2 times out. Then, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied during the operation of Timer 2.

[0069] For example, the network-side equipment configures timer 3 and offset 3 for the time event triggered by the conditional handover of the second target cell. After the terminal receives the offset 3 time, it starts timer 3. The first time is the time after offset 3, and the second time is the time when timer 3 expires. Therefore, during the connection reconstruction process, the conditional handover of the second target cell should be applied during the operation of timer 3.

[0070] For example, the network-side equipment configures Timer 4 and offset 4 for the conditional handover event triggered by the second target cell. After receiving the conditional reconfiguration, the terminal starts Timer 4. The first time is the timeout period of Timer 4, and the second time is time T2 after the timeout period of Timer 4, which is offset 4. Then, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied during the period from the timeout of Timer 4 to T2.

[0071] (2) The current time has reached the first time of the second target cell. If the time period indicated by the time information of the third event is after the first time, the conditional reconfiguration of the second target cell should be applied after the first time of the second target cell.

[0072] (3) The current time has not yet exceeded the second time of the second target cell. If the time period indicated by the time information of the third event is a time before the second time, the conditional reconfiguration of the second target cell should be applied before the second time of the second target cell.

[0073] In (1)-(3) above, during the connection reconstruction process, the time information in the time event triggered by the condition handover is reused, and the condition reconfiguration of the second target cell is applied within the time indicated by the time information in the time event triggered by the condition handover of the second target cell at the current time, and condition handover is attempted.

[0074] (4) The current time has reached the third time of the second target cell but has not yet exceeded the fourth time of the second target cell.

[0075] For example, the time information involved in the first event can be configured to be a period of time between the third and fourth times:

[0076] 1) Absolute time [t5, t6], that is, the network-side device configures absolute time t5 and t6 for the first event of the second target cell, where the third time is t5 and the fourth time is t6. Then, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between t5 and t6.

[0077] 2) Absolute time t7 and offset5; The network-side device configures absolute time t7 and offset5 for the first event of the second target cell. The third time is t7, and the fourth time is t7+offset5. During the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between t7 and t7+offset5.

[0078] 3) offset6 and absolute time t8; The network-side device configures offset6 and absolute time t8 for the time event triggered by the conditional handover of the second target cell. The third time is time T3 after the offset6 time length after receiving the conditional reconfiguration. The second time is t8. Therefore, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied between time T3 and t8.

[0079] Absolute time includes: Coordinated Universal Time (UTC), Daylight Saving Time (DST), Global Positioning System (GPS) time, and local time.

[0080] 4) Timer 5 and Timer 6; The network-side device configures Timer 5 and Timer 6 for the first event of the second target cell. After receiving the configuration information containing the first event, Timer 5 is started. Timer 6 is started after Timer 5 times out. The third time is the time when Timer 5 times out, and the fourth time is the time when Timer 6 times out. Therefore, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied during the operation of Timer 6.

[0081] 5) Timer 7 and offset 7. The network-side equipment configures Timer 7 and offset 7 for the first event of the second target cell. After the terminal receives the offset 7 time containing the configuration information of the first event, Timer 7 is started. The third time is the time after offset 7, and the fourth time is the time when Timer 7 times out. Therefore, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied during the operation of Timer 7.

[0082] 6) Timer 8 and offset 8; The network-side equipment configures Timer 8 and offset 8 for the time event triggered by the conditional handover of the second target cell. After receiving the configuration information containing the first event, the terminal starts Timer 8. The first time is the timeout period of Timer 8, and the second time is time T4 after the timeout period of Timer 8 (offset 8 length). Therefore, during the connection reconstruction process, the conditional reconfiguration of the second target cell should be applied during the period from the timeout of Timer 8 to T4.

[0083] (5) The current time has reached the fifth time of the second target cell.

[0084] For example, the time information involved in the first event can be configured as the fifth time. For instance, the network-side device can configure the time information involved in the first event as the absolute time t9, and the fifth time is t9. Another example is that the network-side device can configure the time information involved in the first event as timer 9. When the terminal receives the network-side configuration message containing timer 9, it starts timer 9. If timer 9 times out, it means that the fifth time has been reached.

[0085] (6) The current time has not yet exceeded the sixth time of the second target cell. For example, the time information involved in the first event can be configured as the sixth time. For example, the network-side device configures the time information involved in the first event as the absolute time t10, and the sixth time is t10; for another example, the network-side device configures the time information involved in the first event as timer 10. When the terminal receives the network-side configuration message containing timer 10, it starts timer 10. If the timer is running, it means that the sixth time has not yet been reached.

[0086] In (4)-(6), the conditional reconfiguration of the second target cell is applied within the time period indicated by the time information of the first event configured by the network-side device for the second target cell.

[0087] In one possible implementation, when the current time falls within the time period indicated by the time information of the first target cell, prioritizing the selection of the first target cell includes: prioritizing the selection of candidate cells whose time information includes the current time. That is, in the cell selection process, the terminal prioritizes the selection of candidate cells whose time information includes the current time. In other words, the terminal prioritizes the selection of the first target cell, wherein the current time falls within the time period indicated by the time information of the first target cell.

[0088] In the terminal's cell selection process, the terminal, based on its own capabilities, prioritizes searching for candidate cells whose time information indicates that the current time is included.

[0089] Optionally, the current time within the time period indicated by the time information of the first target cell includes one of the following:

[0090] (1) The current time has reached the first time of the first target cell, and the current time has not exceeded the second time of the first target cell.

[0091] (2) The current time has reached the first time of the first target cell.

[0092] (3) The current time has not yet exceeded the second time of the first target cell.

[0093] In (1)-(3) above, during the cell selection process, the time information in the time event triggered by the condition handover is reused, and the first target cell in the time event triggered by the condition handover is selected first, including the current time.

[0094] (4) The current time has reached the seventh time of the first target cell, and the current time has not exceeded the eighth time of the first target cell.

[0095] For example, if the network-side device configures absolute times t11 and t12 for the second event of the first target cell, the seventh time is t11 and the eighth time is t12. Then, during the cell selection process, if the current time is between t11 and t12, the first target cell should be selected first.

[0096] For example, if the network-side equipment configures the absolute time t13 and offset9 for the second event of the first target cell, the seventh time is t13 and the eighth time is t13+offset9. Then, during the cell selection process, if the current time is between t13 and t11+offset9, the first target cell should be selected first.

[0097] For example, the network-side device configures offset10 and absolute time t14 for the second event of the first target cell. The seventh time is time T5 after offset10 time length after receiving the configuration information containing the second event, and the eighth time is t14. In the cell selection process, if the current time is between time T5 and t14, the first target cell should be selected first.

[0098] Absolute time includes: Coordinated Universal Time (UTC), Daylight Saving Time (DST), Global Positioning System (GPS) time, and local time.

[0099] For example, the network-side device configures timer 11 and timer 12 for the second event of the first target cell. After receiving the configuration information containing the second event, timer 11 is started. Timer 12 is started after timer 12 times out. The seventh time is the time when timer 11 times out and the eighth time is the time when timer 12 times out. In the cell selection process, if the current time is during the operation of timer 12, the first target cell should be selected first.

[0100] For example, the network-side device configures timer 13 and offset 11 for the second event of the first target cell. After the terminal receives the configuration information containing the second event and the offset 11 time has elapsed, the terminal starts timer 13. The seventh time is the time after offset 11, and the eighth time is the time when timer 13 expires. In the cell selection process, if the current time is during the operation of timer 13, the first target cell should be selected first.

[0101] For example, the network-side equipment configures timer 14 and offset 12 for the second event of the first target cell. After receiving the configuration information containing the second event, the terminal starts timer 14. The seventh time is the time when timer 14 expires, and the eighth time is time T6 after offset 12 hours following the timeout of timer 14. During the cell selection process, if the current time falls between the timeout of timer 14 and T6, the first target cell should be selected first.

[0102] (5) The current time has reached the ninth time of the first target cell. For example, the time information involved in the second event can be configured as the ninth time. For example, the network-side device configures the time information involved in the second event as the absolute time t15, and the fifth time is t15; or, for another example, the network-side device configures the time information involved in the first event as timer 15. When the terminal receives the network-side configuration message containing timer 15, it starts timer 15. If timer 15 times out, it means that the ninth time has been reached.

[0103] (6) The current time has not exceeded the tenth time of the first target cell. For example, the time information involved in the second event can be configured as the tenth time. For example, the network-side device configures the time information involved in the second event as the absolute time t16, and the sixth time is t16; for another example, the network-side device configures the time information involved in the first event as timer 16. When the terminal receives the network-side configuration message containing timer 16, it starts timer 16. If the timer is running, it means that the sixth time has not yet been reached.

[0104] In (4)-(6), if the current time is within the time period indicated by the time information of the second event configured by the network-side device for the first target cell, the first target cell shall be selected first.

[0105] In all the possible implementations described above, the terminal may initiate a connection reconstruction process upon the occurrence of one of the following events:

[0106] RLF detected;

[0107] Switching failed;

[0108] Condition switching failed.

[0109] In one possible implementation, when the current time falls within the time period indicated by the time information of the first target cell, the terminal preferentially selects the first target cell during the cell selection process, including at least one of the following:

[0110] (1) Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then the fourth target candidate cell is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the current time is included. Optionally, if the cell with the strongest signal found on the target frequency is not the fourth target candidate cell, then other cells on that frequency are not considered.

[0111] For example, prioritize searching the frequency of the first target cell. If the strongest cell on that frequency is the first target cell and meets the definition of a suitable cell, then select that first target cell.

[0112] (2) Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found at the target frequency is not the fourth target candidate cell, but the nth strongest signal found at the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then select the fourth target candidate cell as the first target cell, where n is a positive integer greater than or equal to 2, and the fourth target candidate cell is the candidate cell whose time information indicates that the current time is included. Optionally, if the nth strongest signal found at the target frequency is not the fourth target candidate cell, then other cells at that frequency are not considered.

[0113] For example, the frequency of the first target cell is searched first. If the strongest cell on that frequency is not the first target cell, the nth strongest cell on that frequency is searched. If the nth strongest cell is the first target cell and satisfies the definition of a suitable cell, then the first target cell is selected, where n is a positive integer greater than or equal to 2.

[0114] (3) Among the cells with the strongest signals found at multiple frequency points, there are multiple suitable cells, and if the multiple suitable cells include the fourth target candidate cell, the fourth target candidate cell included in the multiple suitable cells is selected as the first target cell, wherein the fourth target candidate cell is the candidate cell whose time information indicates that the current time is included.

[0115] For example, if the strongest cells on multiple frequency points meet the definition of a suitable cell, and these multiple suitable cells include the first target cell, then the first target cell is selected.

[0116] In the above possible implementations, when prioritizing the search for the target frequency of the fourth target candidate cell, if multiple fourth target candidate cells exist, the frequency of the fourth target candidate cell with the longest target time among the multiple fourth target candidate cells is prioritized for search, wherein the target time is determined based on the first time and second time of the fourth target candidate cell, or based on the seventh time and eighth time of the fourth target candidate cell. Optionally, in the above possible implementations, if multiple fourth target candidate cells exist, the fourth target candidate cell with the longest target time is selected from the multiple fourth target candidate cells as the first target cell, wherein the target time is determined based on the first time and second time of the fourth target candidate cell, or based on the seventh time and eighth time of the fourth target candidate cell.

[0117] Optionally, if the network-side device configures a second event for the fourth target cell, the target time of the fourth target candidate cell is determined based on the seventh and eighth times of the fourth target candidate cell; if no second event is configured, the target time of the fourth target candidate cell is determined based on the first and second times of the fourth target candidate cell.

[0118] In one specific implementation, if the target configuration information includes a third event of the fourth target candidate cell but does not include a second event of the fourth target candidate cell, and the time information indicated by the third event includes a time period from the first time to the second time, then the target time is the time period from the first time to the second time.

[0119] In another specific implementation, if the target configuration information includes the second event of the fourth target candidate cell, and the time information indicated by the second event includes the time period from the seventh time to the eighth time, then the target time is the time period from the seventh time to the eighth time.

[0120] It should be noted that, in this embodiment of the application, the terminal's priority selection of the first target cell during the cell selection process, and / or the terminal's application of the second target cell for conditional reconfiguration during the connection reconstruction process, can be either protocol-defined or network-configured. If the above behavior is protocol-defined, the terminal will always execute the above behavior according to the protocol. If the above behavior is network-configured, the terminal can execute the above behavior according to the behavior configured by the network-side device.

[0121] For example, the network-side device can also indicate whether the terminal should perform the above-described actions through a certain field. For instance, the network-side device can use a bit to indicate whether the terminal should perform the conditional reconfiguration of prioritizing the first target cell and / or applying the second target cell as described above. If the bit is 1, it indicates that the terminal needs to perform the above actions; if the bit is 0, it indicates that the terminal can choose not to perform the above actions. Alternatively, the presence of this field indicates that the terminal needs to perform the above actions; its absence indicates that the terminal can choose not to perform the above actions. Or, if the network side configures a first event, it indicates that the terminal needs to apply the conditional reconfiguration of the second target cell during the connection reconstruction process; if the network side configures a second event, it indicates that the terminal needs to prioritize the first target cell during the cell reselection process.

[0122] In the embodiments of this application, cell selection may include: cell selection in an idle or inactive state or cell selection during the connection reconstruction process.

[0123] According to the technical solution provided in this application embodiment, during the connection reconstruction process, if the network is configured to attemptCondReconfig=true, if the time period indicated by the time information of the selected cell includes the current time, and the selected cell is a candidate cell, then the conditional reconfiguration of the selected cell is applied to attempt to perform conditional handover; otherwise, the process of initiating the transmission of an RRC reconstruction request message is executed, and / or, candidate cells whose time information includes the current time are selected preferentially.

[0124] Figure 3 This diagram illustrates another flow chart of the mobility management method in an embodiment of this application, whereby method 300 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. Figure 3 As shown, the method may include the following steps.

[0125] S310, the network-side device sends target configuration information to the terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructs the terminal to perform a connection reconstruction process and / or cell selection based on the time information.

[0126] In this embodiment of the application, the target configuration information is the same as the target configuration information in method 200, and for details, please refer to the description in method 200.

[0127] In one possible implementation, the target configuration information includes at least one of the following:

[0128] First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells;

[0129] The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditional reconfiguration of the second target cell is applied, wherein the first target candidate cell is the candidate cell selected during the terminal connection reconstruction process;

[0130] The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time.

[0131] The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

[0132] In one possible implementation, the first configuration information includes at least one of the following:

[0133] The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover;

[0134] The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time;

[0135] The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

[0136] In one possible implementation, the fourth event includes at least one of the following:

[0137] Triggered events based on signal strength and / or signal quality;

[0138] Location-based triggering events.

[0139] The mobility management method provided in this application will be described below through specific embodiments.

[0140] Example 1

[0141] Figure 4 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application, such as... Figure 4 As shown in the embodiments of this application, the mobility management method 400 mainly includes the following steps.

[0142] S401, the terminal obtains the target configuration information.

[0143] The target configuration information may include:

[0144] (1) First configuration information, the first configuration information including configuration information for condition switching, wherein the first configuration information may include:

[0145] (1.1) At least two candidate cells;

[0146] (1.2) Events that trigger conditional handover for each candidate cell, including third and / or fourth events.

[0147] The third event is used to indicate the time information when the terminal can apply the conditional handover configuration information of the target candidate cell and perform conditional handover to the target candidate cell if the target candidate cell meets the fourth event. The time information is a period of time from the first time to the second time.

[0148] For example, the network is configured with absolute times t1 and t2, where the first time is t1 and the second time is t2, and the time information is a period of time from t1 to t2.

[0149] For example, the network configuration includes absolute time t3 and offset1. The first time is t3. The second time is t3 + offset1, and the time information refers to the period from t3 to t3 + offset1.

[0150] For example, the network side is configured with offset2 and absolute time t4. The first time is the time T1 after the terminal receives the conditional reconfiguration after offset2 time length, and the second time is t4. The time information is a period of time from T1 to t4.

[0151] For example, network configuration timers 1 and 2 are used. After receiving a conditional reconfiguration, timer 1 is started. Timer 2 is started after timer 1 times out. The first time is the timeout period of timer 1, and the second time is the timeout period of timer 2. The time information is the period of time that timer 2 runs.

[0152] For example, in network configuration, timer 3 and offset 2 are used. After the terminal receives the conditional reconfiguration offset 2, timer 3 is started. The first time is the time after offset 2, and the second time is the timeout period of timer 3. The time information is the running time of timer 3.

[0153] For example, the network-side device configures timer 4 and offset 4 for the time event triggered by the conditional handover of the second target cell. After receiving the conditional reconfiguration, the terminal starts timer 4. The first time is the time when timer 4 expires, and the second time is the time T2 after offset 4 times out. The time information is the time from timer 4 timeout to T2.

[0154] The fourth event is any event other than the third event, including at least one of the following:

[0155] i. Triggering events related to signal strength and / or signal quality, such as event A4, CondEvent A3, or CondEvent A5.

[0156] ii. Location-related triggering events, such as: the distance between the terminal and the serving cell reference point is greater than a certain threshold; or the distance between the terminal and the target cell reference point is less than a certain threshold; or the distance between the terminal and the serving cell reference point is greater than a certain threshold and the distance between the terminal and the target cell reference point is less than a certain threshold; or the distance between the terminal and the serving cell reference point is greater than the distance between the terminal and the target cell reference point; or the distance between the terminal and the serving cell reference point minus the distance between the terminal and the target cell reference point is greater than a certain threshold. The reference point can be the cell center.

[0157] The fourth event may also be not configured, or the fourth event may include one or more triggering events.

[0158] (2) Second configuration information, which indicates that if the selected target cell during the connection reconstruction process is a conditional handover candidate cell that meets the first condition and is the first cell selection after a failure, the UE should perform conditional reconfiguration of the target cell; the failure includes RLF, handover failure, and CHO failure. For example, the second configuration information is attemptCondReconfig=true.

[0159] (3) First event, the first event is used to indicate the time information when the conditional handover configuration information of the target cell can be applied and the conditional handover is performed on the target cell in the terminal connection reconstruction process.

[0160] For example, the first event can be configured to occur over a period of time, from the third time to the fourth time, for example:

[0161] 1) Absolute time t5 and absolute time t6, that is, the network side device configures absolute time t5 and t6 for the first event of the second target cell, wherein the third time is t5 and the fourth time is t6, and the time information is a period of time from t5 to t6.

[0162] 2) Absolute time t7, offset5; The network-side device configures absolute time t7 and offset5 for the first event of the second target cell. The third time is t7, and the fourth time is t6+offset5. The time information is a period from t7 to t6+offset6.

[0163] 3) offset6 and absolute time t8; The network-side device configures offset6 and absolute time t8 for the time event triggered by the conditional handover of the second target cell. The third time is the time T3 after the offset6 time length after receiving the conditional reconfiguration. The second time is t8. The time information is a period of time from T3 to t8.

[0164] Absolute time includes: Coordinated Universal Time (UTC), Daylight Saving Time (DST), Global Positioning System (GPS) time, and local time.

[0165] 4) Timer 5 and Timer 6; The network-side device configures Timer 5 and Timer 6 for the first event of the second target cell. After the terminal receives the configuration information containing the first event, it starts Timer 5. Timer 5 times out and Timer 6 is started. The third time is the time when Timer 5 times out, and the fourth time is the time when Timer 6 times out. The time information is the time during which Timer 6 runs.

[0166] 5) Timer 7 and offset 7. The network-side device configures timer 6 and offset 7 for the first event of the second target cell. After the terminal receives the offset 7 containing the configuration information of the first event, timer 6 is started. The third time is the time after offset 7, and the fourth time is the time when timer 7 times out. The time information is the time during which timer 7 runs.

[0167] 6) Timer 8 and offset 8; The network-side device configures Timer 8 and offset 4 for the time event triggered by the conditional handover of the second target cell. After receiving the configuration information containing the first event, the terminal starts Timer 8. The first time is the timeout period of Timer 8, and the second time is the time T4 after the timeout period of Timer 4, which is the length of offset 8. The time information is the time from the timeout of Timer 8 to T4.

[0168] (5) The current time has reached the fifth time of the second target cell.

[0169] For example, the first event can be configured as the fifth time. For instance, if the network side configures an absolute time t9, the fifth time is t9. Another example is that the network side configures a timer 9. When the terminal receives the network side configuration, it starts the timer 9. If the timer expires, it means that the fifth time has been reached.

[0170] (6) The current time has not exceeded the sixth time of the second target cell.

[0171] For example, the first time can be configured as the sixth time. For example, if the network side configures an absolute time t10, the sixth time is t10. Another example is that the network side configures timer 10. When the terminal receives the network side configuration, it starts timer 6. If the timer is running, it means that the sixth time has not yet been reached.

[0172] S402: The terminal initiates a connection reconstruction process.

[0173] The terminal initiates a connection reconstruction process when one of the following conditions occurs:

[0174] (1) RLF was detected;

[0175] (2) Handover failure;

[0176] (3) Conditional Hanover failure.

[0177] Among them, handover failure and conditional handover failure include at least one of the following:

[0178] T304 timed out;

[0179] Second timeout

[0180] For example, if T304 times out, regardless of whether the second timeout occurs, the handover is considered a failure.

[0181] For example, if the second timeout occurs, regardless of whether T304 times out, the handover is considered a failure.

[0182] For example, a handover is considered to have failed only if T304 times out and the second timeout also times out.

[0183] S403: The terminal performs connection reconstruction based on the target configuration information.

[0184] S403 may include:

[0185] If the target configuration information includes the second configuration information, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell that meets the first condition, then the selected suitable cell is the target cell, the conditional handover configuration of the target cell is applied, and a conditional handover is attempted; otherwise, the process of initiating the transmission of the RRCReestablishmentRequest message is executed.

[0186] The first condition being met includes one of the following:

[0187] The first time has been reached and the second time has not yet been exceeded;

[0188] We arrived immediately;

[0189] The second time has not yet passed;

[0190] The third time has arrived and the fourth time has not yet passed;

[0191] The fifth time has arrived;

[0192] The sixth time has not yet passed.

[0193] In other words, if the target configuration information includes the second configuration information, and the terminal selects the third target candidate cell among the multiple candidate cells during the connection reconstruction process, and the current time is within the time period indicated by the time information of the third target candidate cell, then the third target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration. Otherwise, the process of initiating the transmission of the RRCReestablishmentRequest message is executed.

[0194] The current time falling within the time period indicated by the time information of the second target cell includes one of the following:

[0195] The current time has reached the first time of the second target cell but has not yet exceeded the second time of the second target cell;

[0196] The current time has reached the first time of the second target cell;

[0197] The current time has not yet exceeded the second time of the second target cell;

[0198] The current time has reached the third time of the second target cell but has not yet exceeded the fourth time of the second target cell;

[0199] The current time has reached the fifth time of the second target cell;

[0200] The current time has not yet exceeded the sixth time of the second target cell.

[0201] For example, if the network side does not configure a first event, it will determine whether the current time is within the time period indicated by the time information of the second target cell according to the time information in the first configuration information of the second target cell.

[0202] For example, if the network is configured with absolute times t1 and t2, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t1 has been reached and / or t2 has not yet been exceeded, the conditional handover configuration of the cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the cell is executed.

[0203] For example, if the network is configured with absolute time t3 and offset1, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t3 has been reached and / or t3+offset1 has not been exceeded, the conditional handover configuration of the cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the cell is executed.

[0204] For example, if the network is configured with offset2 and absolute time t4, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and the time T1 after the offset2 time length following the conditional reconfiguration has arrived and / or t4 has not yet been exceeded, the conditional handover configuration of the cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the cell is executed.

[0205] For example, the network is configured with timer 1 and timer 2. After receiving a conditional reconfiguration, timer 1 is started. Timer 2 is started when timer 1 times out. The suitable cell selected during the connection reconstruction process is a conditional handover candidate cell. During the operation of timer 2, the conditional handover configuration of the cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the cell is executed.

[0206] For example, if the network side is configured with a first event, it will determine whether the current time is within the time period indicated by the time information of the second target cell according to the time information of the first event. Here, the first event is configured as a period between the third and fourth times. If the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and the third time has not yet arrived and the fourth time has not yet exceeded, the conditional handover configuration of the cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is executed.

[0207] For example, if the network is configured with absolute times t5 and t6, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t5 has been reached and / or t6 has not yet been exceeded, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is performed to the selected cell.

[0208] For example, if the network is configured with absolute time t7 and offset5, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t7 has been reached and / or t7+offset5 has not been exceeded, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is performed to the selected cell.

[0209] For example, the network is configured with offset6 and absolute time t8; during the connection reconstruction process, the suitable cell selected is a conditional handover candidate cell, and the time T3 after offset6 hours after receiving the first event has arrived and / or t8 has not yet been exceeded, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is performed to the selected cell.

[0210] For example, the network configures timers 5 and 6. After receiving configuration information containing the first event, timer 5 is started. Timer 6 is started after timer 5 times out. The suitable cell selected during the connection reconstruction process is a conditional handover candidate cell. During the operation of timer 6, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the selected cell is performed.

[0211] For example, the network-side device configures timer 7 and offset 7. After the terminal receives the offset 7 time containing the configuration information of the first event, timer 7 is started. The suitable cell selected during the connection reconstruction process is a conditional handover candidate cell. During the operation of timer 7, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of RRCReestablishmentRequest message to the selected cell is executed.

[0212] For example, the network side configures timer 8 and offset 8. After receiving configuration information containing the first event, the terminal starts timer 8. The first time is the timeout period of timer 8, and the second time is time T4 after offset 8 hours following the timeout of timer 4. The suitable cell selected during connection reconstruction is a conditional handover candidate cell. During the period from timer 8 timeout to T4, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the selected cell is performed.

[0213] Alternatively, if the first event is configured as the fifth time, the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and the fifth time has arrived, the conditional handover configuration of the cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is executed.

[0214] For example, if the network side configures an absolute time t9, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t9 has arrived, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message to the selected cell is executed.

[0215] For example, the network side configures timer 9. When the terminal receives the network side configuration, it starts timer 9. During the connection reconstruction process, the suitable cell selected is the conditional handover candidate cell. If timer 9 times out, the conditional handover configuration of the selected cell is applied and the conditional handover is attempted. Otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is performed to the selected cell.

[0216] For example, if the first event is configured as the sixth time, the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and the sixth time has not yet expired, the conditional handover configuration of the cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is executed.

[0217] Alternatively, if the network side configures an absolute time t10, and the suitable cell selected during the connection reconstruction process is a conditional handover candidate cell, and t10 has not yet arrived, the conditional handover configuration of the selected cell is applied and a conditional handover is attempted; otherwise, the process of initiating the transmission of an RRCReestablishmentRequest message is executed to the selected cell.

[0218] For example, the network side configures timer 10. When the terminal receives the network side configuration, it starts timer 10. During the connection reconstruction process, the suitable cell selected is the conditional handover candidate cell. If timer 10 is still running, the conditional handover configuration of the selected cell is applied and the conditional handover is attempted. Otherwise, the process of initiating the transmission of RRCReestablishmentRequest message to the selected cell is executed.

[0219] Example 2

[0220] In this embodiment, the terminal performs cell reselection (RRC_CONNECTED) in the connection reconstruction process based on the target configuration information.

[0221] Figure 5 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application, such as... Figure 5 As shown, the method 500 mainly includes the following steps.

[0222] S501: The terminal obtains the target configuration information.

[0223] The target configuration information may include:

[0224] (1) First configuration information, which includes configuration information for condition switching. This first configuration information is the same as the first configuration information in Embodiment 1, and you can refer to the relevant description in Embodiment 1 for details.

[0225] (2) Second event, the second event is used to indicate the time information of the preferred target cell in the terminal cell selection process. The time information can be a period of time from the seventh time to the eighth time, or a time after the ninth time, or a time before the tenth time. The time information is configured per cell.

[0226] For example, the second event can be configured to be a period of time from the seventh time to the eighth time.

[0227] For example, the network-side equipment configures absolute times t11 and t12 for the second event of the first target cell. The seventh time is t11, the eighth time is t12, and the time period is the period from t11 to t12.

[0228] For example, the network-side device configures an absolute time t13 and offset9 for the second event of the first target cell. The seventh time is t13, the eighth time is t13+offset9, and the time period is the period from t13 to t11+offset9.

[0229] For example, the network-side device configures offset10 and absolute time t14 for the second event of the first target cell. The seventh time is time T5 after offset10 time length after receiving the configuration information containing the second event. The eighth time is t14. The time period is the period from T5 to t14.

[0230] Absolute time includes: Coordinated Universal Time (UTC), Daylight Saving Time (DST), Global Positioning System (GPS) time, and local time.

[0231] For example, the network-side device configures timer 11 and timer 12 for the second event of the first target cell. After receiving the configuration information containing the second event, timer 11 is started. Timer 12 is started after timer 12 times out. The seventh time is the time when timer 11 times out, and the eighth time is the time when timer 12 times out. The time period is the time during which timer 12 runs.

[0232] For example, the network-side device configures timer 13 and offset 11 for the second event of the first target cell. After the terminal receives the offset 11 time containing the configuration information of the second event, it starts timer 13. The seventh time is the time after offset 11, the eighth time is the time when timer 13 times out, and the time period is the time during which timer 13 runs.

[0233] For example, the network-side device configures timer 14 and offset 12 for a second event in the first target cell. After receiving the configuration information containing the second event, the terminal starts timer 14. The seventh time is the time when timer 14 times out, and the eighth time is time T6 after offset 12 times out. This period is the time from timer 14 timeout to T6.

[0234] For example, the second event can be configured as the ninth time. For instance, if the network side configures an absolute time t15, then the fifth time is t15. Another example is that if the network side configures timer 15, the terminal will start timer 10 when it receives the network side configuration. If the timer expires, it means that the ninth time has been reached.

[0235] For example, the second event can be configured as the tenth time. For instance, if the network side configures an absolute time t16, the sixth time is t16. Another example is that the network side configures a timer 16. When the terminal receives the network side configuration, it starts the timer 16. If the timer is running, it means that the tenth time has not yet been reached.

[0236] S502, the terminal initiates a connection reconstruction process.

[0237] For example, a terminal can initiate a connection rebuilding process when one of the following conditions occurs:

[0238] RLF detected;

[0239] Handover failure

[0240] Conditional Hanover failure.

[0241] The Handover failure and Conditional Handover failure include at least one of the following:

[0242] T304 timed out;

[0243] • Second timeout.

[0244] For details, please refer to the relevant description in Example 1.

[0245] S503, the terminal performs cell selection based on the target configuration information.

[0246] The terminal performing cell selection based on the target configuration information may include:

[0247] If the target configuration information includes the first configuration information, the conditional handover candidate cell that meets the second condition is selected first, and the conditional handover candidate cell that meets the second condition is the target cell.

[0248] The second condition includes at least one of the following:

[0249] The first time has been reached and the second time has not yet been exceeded;

[0250] We arrived immediately;

[0251] The second time has not yet passed;

[0252] The seventh time has arrived and the eighth time has not yet passed;

[0253] The ninth hour has arrived;

[0254] The tenth time has not yet passed.

[0255] In other words, if the current time falls within the time period indicated by the time information of the first target cell, the first target cell is selected first. For example, candidate cells whose time information includes the current time are selected first.

[0256] The current time falling within the time period indicated by the time information of the first target cell includes one of the following:

[0257] The current time has reached the first time of the first target cell, and the current time has not yet exceeded the second time of the first target cell;

[0258] The current time has reached the first time of the first target cell;

[0259] The current time has not yet exceeded the second time of the first target cell;

[0260] The current time has reached the seventh time of the first target cell, and the current time has not yet exceeded the eighth time of the first target cell;

[0261] The current time has reached the ninth time of the first target cell;

[0262] The current time has not yet exceeded the tenth time of the first target cell.

[0263] The preferred selection includes at least one of the following:

[0264] • Prioritize searching the frequency of the first target cell. If the strongest cell on that frequency is the first target cell and meets the definition of a suitable cell, then select that first target cell.

[0265] • Prioritize searching the frequency of the target cell. If the strongest cell on that frequency is not the first target cell, then search for the nth strongest cell on that frequency. If the nth strongest cell is the first target cell and satisfies the definition of a suitable cell, then select that target cell, where n is a positive integer greater than or equal to 2.

[0266] If the strongest cells on multiple frequency points meet the definition of a suitable cell, and these multiple suitable cells include the first target cell, then the first target cell is selected.

[0267] The following example uses "the first time has arrived and the second time has not yet been exceeded" and "prioritize searching the frequency of the target cell. If the strongest cell on that frequency is a candidate cell for handover that meets the second condition and satisfies the definition of a suitable cell, then select the target cell". Other examples can be combined in pairs to explain the priority selection.

[0268] For example, the network configures the target cell's time information as absolute times t11 and t12. If t11 has been reached and t12 has not been exceeded, the frequency of the target cell is searched first. If the strongest cell on that frequency is the target cell and meets the definition of a suitable cell, then the target cell is selected.

[0269] In this embodiment of the application, if there are multiple target cells, the terminal selects the target cell with the longest target time. The target time is determined based on a first time and a second time, or based on a seventh time and an eighth time.

[0270] Taking determining the target time based on the first and second times as an example, for instance, if the network is configured with absolute times t1 and t2, the target time is t2 - t1. Another example is configuring the network with absolute times t3 and offset1, where the target time is offset1. Yet another example is configuring timer 1 and timer 2; after receiving a conditional reconfiguration, timer 1 is started, and timer 2 is started after timer 1 times out; the target time is the length of timer 2.

[0271] The method of determining the target time based on the seventh and eighth times is similar to the method of determining the target time based on the first and second times, and will not be described in detail here.

[0272] Example 3

[0273] The difference between this embodiment and embodiment two is that in this embodiment, the UE performs cell reselection in IDLE state or INACTIVE state.

[0274] Figure 6 This illustration shows another flowchart of the mobility management method provided in an embodiment of this application, such as... Figure 6 As shown, the mobility management method 600 mainly includes the following steps.

[0275] S601, the terminal obtains the target configuration information.

[0276] The target configuration information includes:

[0277] (1) First configuration information, which includes configuration information for condition switching. The first configuration information is the same as the first configuration information in Embodiment 1, and will not be repeated here.

[0278] (2) Second event, the second event is used to indicate the time information of the preferred target cell in the terminal cell selection process. The time information can be a period of time from the seventh time to the eighth time, or a time after the ninth time, or a time before the tenth time. The time information is configured per cell.

[0279] The second event is the same as the second event in Example 2, and will not be described again here.

[0280] S602, when connection reconstruction fails, the terminal enters IDLE state.

[0281] Connection reconstruction failure includes at least one of the following:

[0282] T311 timeout, UE failed to select a suitable cell.

[0283] T301 timeout: The UE did not receive a response from the network (RRC re-establishment or RRC setup).

[0284] S603, the terminal performs cell selection based on the target configuration information.

[0285] The terminal performs cell selection based on the target configuration information, including:

[0286] If the target configuration information includes the first configuration information, the conditional handover candidate cell that meets the second condition is selected first, and the conditional handover candidate cell that meets the second condition is the target cell.

[0287] The second condition being met includes at least one of the following:

[0288] The first time has been reached and the second time has not yet been exceeded;

[0289] We arrived immediately;

[0290] The second time has not yet passed;

[0291] The seventh time has arrived and the eighth time has not yet passed;

[0292] The ninth hour has arrived;

[0293] The tenth time has not yet passed.

[0294] In other words, when the current time is within the time period indicated by the time information of the first target cell, the first target cell is selected first. For example, the candidate cell whose time information includes the current time is selected first.

[0295] The current time falling within the time period indicated by the time information of the first target cell includes one of the following:

[0296] The current time has reached the first time of the first target cell, and the current time has not yet exceeded the second time of the first target cell;

[0297] The current time has reached the first time of the first target cell;

[0298] The current time has not yet exceeded the second time of the first target cell;

[0299] The current time has reached the seventh time of the first target cell, and the current time has not yet exceeded the eighth time of the first target cell;

[0300] The current time has reached the ninth time of the first target cell;

[0301] The current time has not yet exceeded the tenth time of the first target cell.

[0302] The preferred selection includes at least one of the following:

[0303] • Prioritize searching the frequency of the target cell. If the strongest cell on that frequency is the target cell and meets the definition of a suitable cell, then select that cell.

[0304] • Prioritize searching the frequency of the target cell. If the strongest cell on that frequency is not the target cell, then search for the nth strongest cell on that frequency. If the nth strongest cell is the target cell and satisfies the definition of a suitable cell, then select that cell, where n is a positive integer greater than or equal to 2.

[0305] • If the strongest cells on multiple frequency points meet the definition of a suitable cell, and these multiple suitable cells contain the target cell, then that cell is selected.

[0306] If multiple target cells exist, the terminal selects the target cell with the longest target time. The target time is determined based on the first time and the second time, or based on the seventh time and the eighth time.

[0307] In S603, the terminal performs cell selection based on the target configuration information in the same way as the terminal in Embodiment 2 performs cell selection based on the target configuration information. For details, please refer to the description of Embodiment 2, which will not be repeated here.

[0308] It should be noted that the mobility management method provided in this application embodiment can be executed by a mobility management device, or by a control module within the mobility management device for executing the mobility management method. This application embodiment uses the execution of the mobility management method by a mobility management device as an example to illustrate the mobility management device provided in this application embodiment.

[0309] Figure 7 This illustration shows a structural diagram of a mobility management device provided in an embodiment of this application, such as... Figure 7 As shown, the device 700 mainly includes: a first acquisition module 701, used to acquire target configuration information, wherein the target configuration information includes time information of multiple candidate cells; and an execution module 702, used to execute a cell selection process and / or a connection reconstruction process based on the target configuration information.

[0310] In one possible implementation, the execution module 702 performs a cell selection process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the first target cell, prioritizing the selection of the first target cell during the cell selection process; and / or, the execution module 702 performs a connection reconstruction process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the second target cell, applying the conditional reconfiguration of the second target cell during the connection reconstruction process, wherein the first target cell is one of the plurality of candidate cells, and the second target cell is one of the plurality of candidate cells.

[0311] In one possible implementation, the target configuration information includes at least one of the following:

[0312] First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells;

[0313] The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditional reconfiguration of the second target cell is applied, wherein the first target candidate cell is the candidate cell selected during the terminal connection reconstruction process;

[0314] The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time.

[0315] The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

[0316] In one possible implementation, the first configuration information includes at least one of the following:

[0317] The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover;

[0318] The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time;

[0319] The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

[0320] In one possible implementation, the fourth event includes at least one of the following:

[0321] Triggered events based on signal strength and / or signal quality;

[0322] Location-based triggering events.

[0323] In one possible implementation, when the current time falls within the time period indicated by the time information of the second target cell, the conditional configuration of the second target cell is applied during the connection reconstruction process, including:

[0324] If the target configuration information includes the second configuration information, and the cell selected during the connection reconstruction process is the third target candidate cell among the multiple candidate cells, and the current time is within the time period indicated by the time information of the third target candidate cell, then the third target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration.

[0325] In one possible implementation, the execution module 702 is further configured to:

[0326] If the target configuration information does not include the second configuration information, or the current time is not within the time period indicated by the time information of the third target candidate cell, or the cell selected during the connection reconstruction process is not one of the multiple candidate cells, the process of initiating a connection establishment request is executed.

[0327] In one possible implementation, the current time within the time period indicated by the time information of the second target cell includes one of the following:

[0328] The current time has reached the first time of the second target cell but has not yet exceeded the second time of the second target cell;

[0329] The current time has reached the first time of the second target cell;

[0330] The current time has not yet exceeded the second time of the second target cell.

[0331] The current time has reached the third time of the second target cell but has not yet exceeded the fourth time of the second target cell;

[0332] The current time has reached the fifth time of the second target cell;

[0333] The current time has not yet exceeded the sixth time of the second target cell.

[0334] In one possible implementation, when the current time falls within the time period indicated by the time information of the first target cell, the first target cell is preferentially selected, including:

[0335] The candidate cells whose time information includes the current time are preferred.

[0336] In one possible implementation, the current time within the time period indicated by the time information of the first target cell includes one of the following:

[0337] The current time has reached the first time of the first target cell, and the current time has not yet exceeded the second time of the first target cell;

[0338] The current time has reached the first time of the first target cell;

[0339] The current time has not yet exceeded the second time of the first target cell;

[0340] The current time has reached the seventh time of the first target cell, and the current time has not yet exceeded the eighth time of the first target cell;

[0341] The current time has reached the ninth time of the first target cell;

[0342] The current time has not yet exceeded the tenth time of the first target cell.

[0343] In one possible implementation, when the current time falls within the time period indicated by the time information of the first target cell, the first target cell is preferentially selected during the cell selection process, including at least one of the following:

[0344] Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then the fourth target candidate cell is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time.

[0345] Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is not the fourth target candidate cell, but the cell with the nth strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then select the fourth target candidate cell as the first target cell, where n is a positive integer greater than or equal to 2, and the fourth target candidate cell is the candidate cell whose time information indicates that the current time is included.

[0346] Among the cells with the strongest signals found at multiple frequency points, there are multiple suitable cells. If the multiple suitable cells include a fourth target candidate cell, the fourth target candidate cell among the multiple suitable cells is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time.

[0347] In one possible implementation, the target frequency of the fourth target candidate cell is searched first, including:

[0348] In the presence of multiple fourth target candidate cells, priority is given to searching the frequency of the fourth target candidate cell with the longest target time among the multiple fourth target candidate cells, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

[0349] In one possible implementation, selecting the fourth target candidate cell as the first target cell includes:

[0350] In the presence of multiple fourth target candidate cells, the fourth target candidate cell with the longest target time is selected as the first target cell, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

[0351] In one possible implementation, the cell selection includes: cell selection in an idle state or cell selection during the connection re-establishment process.

[0352] In one possible implementation, the execution module 702 is further configured to:

[0353] Before executing the connection reconstruction process based on the target configuration information, the connection reconstruction process shall be initiated if one of the following events occurs:

[0354] A wireless link failure (RLF) was detected.

[0355] Switching failed;

[0356] Condition switching failed.

[0357] The mobility management device in this application embodiment can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not impose specific limitations.

[0358] The mobility management device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit the specific operating system used.

[0359] The mobility management device provided in this application embodiment can achieve Figures 2 to 7 The various processes implemented in the terminal of the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0360] Figure 8 This application provides another schematic diagram of the mobility management device according to an embodiment of the present application. Figure 8 As shown, the device 800 mainly includes: a second acquisition module 801, used to acquire target configuration information of the terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructs the terminal to perform a connection reconstruction process and / or a cell selection process based on the time information; and a sending module 802, used to send the target configuration information to the terminal.

[0361] In one possible implementation, the target configuration information includes at least one of the following:

[0362] First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells;

[0363] The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditional reconfiguration of the second target cell is applied, wherein the first target candidate cell is the candidate cell selected during the terminal connection reconstruction process;

[0364] The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time.

[0365] The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

[0366] In one possible implementation, the first configuration information includes at least one of the following:

[0367] The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover;

[0368] The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time;

[0369] The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

[0370] In one possible implementation, the fourth event includes at least one of the following:

[0371] Triggered events based on signal strength and / or signal quality;

[0372] Location-based triggering events.

[0373] The mobility management device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit the specific operating system used.

[0374] The mobility management device provided in this application embodiment can achieve Figures 2 to 7The various processes implemented by the network-side device or network in the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0375] Optional, such as Figure 9 As shown, this application embodiment also provides a communication device 900, including a processor 901, a memory 902, and a program or instructions stored in the memory 902 and executable on the processor 901. For example, when the communication device 900 is a terminal, the program or instructions executed by the processor 901 implement the various processes of the above-described mobility management method 200 embodiment and achieve the same technical effect. When the communication device 900 is a network-side device, the program or instructions executed by the processor 901 implement the various processes of the above-described mobility management method 300 embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0376] This application also provides a terminal, including a processor and a communication interface. The processor is used to implement the various processes of the above-described mobility management method 200 embodiments, and the communication interface is used to communicate with network-side devices. This terminal embodiment corresponds to the above-described terminal-side method embodiments. All implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 10 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0377] The terminal 1000 includes, but is not limited to, the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0378] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 10 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0379] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0380] In this embodiment, the radio frequency unit 1001 receives downlink data from the network-side device and processes it for the processor 1010; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0381] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include high-speed random access memory and non-transient memory, wherein the non-transient memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-transient solid-state storage device.

[0382] Processor 1010 may include one or more processing units; optionally, processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1010.

[0383] The processor 1010 is used for:

[0384] Obtain target configuration information, wherein the target configuration information includes time information of multiple candidate cells;

[0385] Based on the target configuration information, perform the cell selection process and / or the connection reconstruction process.

[0386] This application also provides a network-side device, including a processor and a communication interface. The processor is used to implement the various processes of the above-described mobility management method 300 embodiment, and the communication interface is used to communicate with a terminal. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0387] Specifically, embodiments of this application also provide a network-side device. For example... Figure 11 As shown, the network device 1100 includes: an antenna 1101, a radio frequency (RF) device 1102, and a baseband device 1103. The antenna 1101 is connected to the RF device 1102. In the uplink direction, the RF device 1102 receives information through the antenna 1101 and transmits the received information to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes the information to be transmitted and transmits it to the RF device 1102. The RF device 1102 processes the received information and transmits it through the antenna 1101.

[0388] The aforementioned frequency band processing device can be located in the baseband device 1103. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1103, which includes a processor 1104 and a memory 1105.

[0389] The baseband device 1103 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 11 As shown, one of the chips, for example, is a processor 1104, which is connected to a memory 1105 to call the program in the memory 1105 and execute the network device operation shown in the above method embodiment.

[0390] The baseband device 1103 may also include a network interface 1106 for exchanging information with the radio frequency device 1102, such as a common public radio interface (CPRI).

[0391] Specifically, the network-side device in this embodiment of the invention further includes: instructions or programs stored in memory 1105 and executable on processor 1104, wherein processor 1104 calls the instructions or programs in memory 1105 to execute. Figure 8 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0392] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the mobility management methods 200 and 300 described above, and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0393] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0394] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described mobility management methods 200 and 300 embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0395] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0396] This application also provides a computer program / program product, which is stored in a non-transient storage medium and is executed by at least one processor to implement the various processes of the above-described mobility management methods 200 and 300, and can achieve the same technical effects. To avoid repetition, it will not be described again here.

[0397] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0398] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0399] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A mobility management method, characterized in that, include: The terminal acquires target configuration information, wherein the target configuration information includes time information of multiple candidate cells; The terminal performs a connection reconstruction process based on the target configuration information; The terminal performs a connection reconstruction process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the selected second target cell, the terminal applies the conditional reconfiguration of the second target cell during the connection reconstruction process, wherein the second target cell is one of the multiple candidate cells.

2. The method according to claim 1, characterized in that, The method further includes: the terminal performing a cell selection process based on the target configuration information.

3. The method according to claim 2, characterized in that, The terminal performs a cell selection process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the first target cell, the terminal prioritizes selecting the first target cell during the cell selection process, wherein the first target cell is one of the multiple candidate cells, and the second target cell is one of the multiple candidate cells.

4. The method according to any one of claims 1 to 3, characterized in that, The target configuration information includes at least one of the following: First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells; The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditional reconfiguration of the second target cell is applied, wherein the first target candidate cell is the candidate cell selected during the terminal connection reconstruction process; The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time. The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

5. The method of claim 4, wherein, The first configuration information includes at least one of the following: The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover; The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time; The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

6. The method of claim 5, wherein, The fourth event includes at least one of the following: Triggered events based on signal strength and / or signal quality; Location-based triggering events.

7. The method of claim 5, wherein, When the current time falls within the time period indicated by the time information of the second target cell, the terminal applies the conditional configuration of the second target cell during the connection reconstruction process, including: If the target configuration information includes the second configuration information, and the terminal selects the third target candidate cell among the multiple candidate cells during the connection reconstruction process, and the current time is within the time period indicated by the time information of the third target candidate cell, then the third target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration.

8. The method of claim 7, wherein, The method further includes: If the target configuration information does not include the second configuration information, or the current time is not within the time period indicated by the time information of the third target candidate cell, or the cell selected during the connection reconstruction process is not one of the multiple candidate cells, the process of initiating a connection establishment request is executed.

9. The method of claim 5, wherein, The current time within the time period indicated by the time information of the second target cell includes one of the following: The current time has reached the first time of the second target cell but has not yet exceeded the second time of the second target cell; The current time has reached the first time of the second target cell; The current time has not yet exceeded the second time of the second target cell; The current time has reached the third time of the second target cell but has not yet exceeded the fourth time of the second target cell; The current time has reached the fifth time of the second target cell; The current time has not yet exceeded the sixth time of the second target cell.

10. The method of claim 5, wherein, When the current time falls within the time period indicated by the time information of the first target cell, the first target cell is selected first, including: The candidate cells whose time information includes the current time are preferred.

11. The method according to claim 10, characterized in that, The current time falls within one of the following time periods indicated by the time information of the first target cell: The current time has reached the first time of the first target cell, and the current time has not yet exceeded the second time of the first target cell; The current time has reached the first time of the first target cell; The current time has not yet exceeded the second time of the first target cell; The current time has reached the seventh time of the first target cell, and the current time has not yet exceeded the eighth time of the first target cell; The current time has reached the ninth time of the first target cell; The current time has not yet exceeded the tenth time of the first target cell.

12. The method of claim 10, wherein, When the current time falls within the time period indicated by the time information of the first target cell, the terminal prioritizes selecting the first target cell during the cell selection process, including at least one of the following: Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then the fourth target candidate cell is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time. Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is not the fourth target candidate cell, but the cell with the nth strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then select the fourth target candidate cell as the first target cell, where n is a positive integer greater than or equal to 2, and the fourth target candidate cell is the candidate cell whose time information indicates that the current time is included. Among the cells with the strongest signals found at multiple frequency points, there are multiple suitable cells. If the multiple suitable cells include a fourth target candidate cell, the fourth target candidate cell among the multiple suitable cells is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time.

13. The method of claim 12, wherein, Prioritize searching for target frequencies where the fourth target candidate cell is located, including: In the presence of multiple fourth target candidate cells, priority is given to searching the frequency of the fourth target candidate cell with the longest target time among the multiple fourth target candidate cells, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

14. The method of claim 12, wherein, Selecting the fourth target candidate cell as the first target cell includes: In the presence of multiple fourth target candidate cells, the fourth target candidate cell with the longest target time is selected as the first target cell, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

15. The method according to claim 2 or 3, characterized in that, The cell selection includes: cell selection in idle or inactive state or cell selection during the connection reconstruction process.

16. The method according to any one of claims 1 to 3, 5 to 14, characterized in that, Before the terminal performs the connection reconstruction process based on the target configuration information, the method further includes: The terminal initiates a connection reconstruction process if one of the following events occurs: A wireless link failure (RLF) was detected. Switching failed; Condition switching failed.

17. A mobility management method, characterized in that, include: The network-side device sends target configuration information to the terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructs the terminal to perform a connection reconstruction process based on the time information; The target configuration information includes at least one of the following: First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells; The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration. The first target candidate cell is the candidate cell selected during the terminal connection reconstruction process. The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time.

18. The method of claim 17, wherein, The target configuration information is also used to instruct the terminal to perform a cell selection process based on the time information.

19. The method of claim 18, wherein, The target configuration information also includes: The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

20. The method according to any one of claims 17 to 19, characterized in that, The first configuration information includes at least one of the following: The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover; The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time; The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

21. The method of claim 20, wherein, The fourth event includes at least one of the following: Triggered events based on signal strength and / or signal quality; Location-based triggering events.

22. A mobility management apparatus, characterized by, include: The first acquisition module is used to acquire target configuration information, wherein the target configuration information includes time information of multiple candidate cells; The execution module is used to perform the connection reconstruction process based on the target configuration information; The execution module performs a connection reconstruction process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the selected second target cell, applying the conditional reconfiguration of the second target cell during the connection reconstruction process, wherein the second target cell is one of the multiple candidate cells.

23. The apparatus according to claim 22, characterized in that, The execution module is also used to perform a cell selection process based on the target configuration information.

24. The apparatus according to claim 23, characterized in that, The execution module performs a cell selection process based on the target configuration information, including: when the current time is within the time period indicated by the time information of the first target cell, the first target cell is selected first during the cell selection process, wherein the first target cell is one of the multiple candidate cells.

25. The apparatus according to any one of claims 22 to 24, characterized in that, The target configuration information includes at least one of the following: First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells; The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration. The first target candidate cell is the candidate cell selected during the device connection reconstruction process. The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time. The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

26. The apparatus of claim 25, wherein, The first configuration information includes at least one of the following: The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover; The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time; The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

27. The apparatus of claim 26, wherein, The fourth event includes at least one of the following: Triggered events based on signal strength and / or signal quality; Location-based triggering events.

28. The apparatus of claim 26, wherein, When the current time falls within the time period indicated by the time information of the second target cell, the conditional configuration of the second target cell is applied during the connection reconstruction process, including: If the target configuration information includes the second configuration information, and the cell selected during the connection reconstruction process is the third target candidate cell among the multiple candidate cells, and the current time is within the time period indicated by the time information of the third target candidate cell, then the third target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration.

29. The apparatus of claim 26, wherein, The execution module is also used for: If the target configuration information does not include the second configuration information, or the current time is not within the time period indicated by the time information of the third target candidate cell, or the cell selected during the connection reconstruction process is not one of the multiple candidate cells, the process of initiating a connection establishment request is executed.

30. The apparatus of claim 26, wherein, The current time within the time period indicated by the time information of the second target cell includes one of the following: The current time has reached the first time of the second target cell but has not yet exceeded the second time of the second target cell; The current time has reached the first time of the second target cell; The current time has not yet exceeded the second time of the second target cell; The current time has reached the third time of the second target cell but has not yet exceeded the fourth time of the second target cell; The current time has reached the fifth time of the second target cell; The current time has not yet exceeded the sixth time of the second target cell.

31. The apparatus of claim 26, wherein, When the current time falls within the time period indicated by the time information of the first target cell, the first target cell is selected first, including: The candidate cells whose time information includes the current time are preferred.

32. The apparatus of claim 31, wherein, The current time falls within one of the following time periods indicated by the time information of the first target cell: The current time has reached the first time of the first target cell, and the current time has not yet exceeded the second time of the first target cell; The current time has reached the first time of the first target cell; The current time has not yet exceeded the second time of the first target cell; The current time has reached the seventh time of the first target cell, and the current time has not yet exceeded the eighth time of the first target cell; The current time has reached the ninth time of the first target cell; The current time has not yet exceeded the tenth time of the first target cell.

33. The apparatus of claim 31, wherein, When the current time falls within the time period indicated by the time information of the first target cell, the first target cell is preferentially selected during the cell selection process, including at least one of the following: Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then the fourth target candidate cell is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time. Prioritize searching the target frequency where the fourth target candidate cell is located. If the cell with the strongest signal found on the target frequency is not the fourth target candidate cell, but the cell with the nth strongest signal found on the target frequency is the fourth target candidate cell, and the fourth target candidate cell is a suitable cell, then select the fourth target candidate cell as the first target cell, where n is a positive integer greater than or equal to 2, and the fourth target candidate cell is the candidate cell whose time information indicates that the current time is included. Among the cells with the strongest signals found at multiple frequency points, there are multiple suitable cells. If the multiple suitable cells include a fourth target candidate cell, the fourth target candidate cell among the multiple suitable cells is selected as the first target cell. The fourth target candidate cell is the candidate cell whose time information indicates that the time includes the current time.

34. The apparatus of claim 33, wherein, Prioritize searching for target frequencies where the fourth target candidate cell is located, including: In the presence of multiple fourth target candidate cells, priority is given to searching the frequency of the fourth target candidate cell with the longest target time among the multiple fourth target candidate cells, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

35. The apparatus of claim 33, wherein, Selecting the fourth target candidate cell as the first target cell includes: In the presence of multiple fourth target candidate cells, the fourth target candidate cell with the longest target time is selected as the first target cell, wherein the target time is determined based on the first time and the second time of the fourth target candidate cell or based on the seventh time and the eighth time of the fourth target candidate cell.

36. The apparatus of claim 23 or 24, wherein, The cell selection includes: cell selection in the idle state or cell selection during the connection reconstruction process.

37. The apparatus according to any one of claims 22 to 24, 26 to 35, characterized in that, The execution module is also used for: Before executing the connection reconstruction process based on the target configuration information, the connection reconstruction process shall be initiated if one of the following events occurs: A wireless link failure (RLF) was detected. Switching failed; Condition switching failed.

38. A mobility management apparatus, characterized by, include: The second acquisition module is used to acquire the target configuration information of the terminal, wherein the target configuration information includes time information of multiple candidate cells, and instructs the terminal to perform a connection reconstruction process based on the time information; The sending module is used to send target configuration information to the terminal; The target configuration information includes at least one of the following: First configuration information, wherein the first configuration information includes conditional reconfiguration of multiple candidate cells; The second configuration information is used to indicate that, within the time period indicated by the time information of the first target candidate cell at the current time, the first target candidate cell is used as the second target cell, and the conditions of the second target cell are applied for reconfiguration. The first target candidate cell is the candidate cell selected during the terminal connection reconstruction process. The first event, wherein the first event instructs the terminal to apply conditional reconfiguration of the second target cell during the connection reconstruction process, provided that the current time falls within the time period indicated by the time information of the second target cell, wherein the time period indicated by the time information of the second target cell includes one of the following: the time period from the third time to the fourth time, the time period after the fifth time, and the time period before the sixth time.

39. The device of claim 38, wherein, The target configuration information is also used to instruct the terminal to perform a cell selection process based on the time information.

40. The device of claim 39, wherein, The target configuration information also includes: The second event, wherein the second event indicates that during the cell selection process, if the current time is within the time period indicated by the time information of the first target cell, the terminal shall preferentially select the first target cell. The time period indicated by the time information of the first target cell includes one of the following: the time period from the seventh time to the eighth time, the time after the ninth time, and the time before the tenth time.

41. The apparatus according to any one of claims 38 to 40, characterized in that, The first configuration information includes at least one of the following: The plurality of candidate cells, wherein the plurality of candidate cells are conditional reconfiguration candidate cells for conditional handover; The third event for each of the candidate cells, wherein the third event is used to trigger conditional handover, the third event instructs the terminal to perform conditional handover within the time period indicated by the time information of the second target candidate cell when the fourth event is met, the second target candidate cell is one of the plurality of candidate cells, and the time period indicated by the time information of the second target candidate cell includes one of the following: the time period from the first time to the second time, the time after the first time, and the time before the second time; The fourth event for each candidate cell, wherein the fourth event is used to trigger conditional handover.

42. The device of claim 41, wherein, The fourth event includes at least one of the following: Triggered events based on signal strength and / or signal quality; Location-based triggering events.

43. A terminal, characterized by It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the mobility management method as described in any one of claims 1 to 16.

44. A network-side device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the mobility management method as described in any one of claims 17 to 21.

45. A readable storage medium characterized by, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the mobility management method as described in any one of claims 1 to 16, or implement the steps of the mobility management method as described in any one of claims 17 to 21.

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