WO2021159277A1 - Data communication method and apparatus, and communication device and storage medium - Google Patents

Abstract

Embodiments of the present disclosure relate to a data communication method and apparatus, and a communication device and a storage medium. In response to a user equipment triggering conditional handover, a first data inactivity timer of a source cell corresponding to the conditional handover continues timing.

Description

Data communication method, device, communication equipment and storage medium Technical field

This application relates to the field of wireless communication technology, but is not limited to the field of wireless communication technology, and in particular to data communication methods, devices, communication equipment, and storage media.

Background technique

There are two ways for the user equipment in the connected state to enter the idle state. One is: the network side sends a radio resource control (RRC, Radio Resource Control) connection release message, and the user equipment can release the RRC connection after receiving it, and the other is : The data inactivity timer configured by the base station for the user equipment expires, and the user equipment automatically releases the RRC connection and enters an idle state, that is, the user equipment automatically releases the RRC connection if there is no data or control signaling sent for a period of time. The network side and the user equipment will synchronously maintain the data inactivity timer to maintain a consistent user equipment state.

The data inactivity timer will be triggered by the following events to restart:

1: Media Access Control (MAC, Media Access Control) receives MAC service data of dedicated traffic channel (DTCH, Dedicated Traffic Channel), dedicated control channel (DCCH, Dedicated Control CHannel), and common control channel (CCCH) Common Control Channel Unit (SDU, service Data Unit);

2: MAC sends DTCH, MAC SDU of DCCH channel.

Summary of the invention

In view of this, the embodiments of the present disclosure provide a data communication method, device, communication device, and storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a data communication method, wherein, when applied to a user equipment, the method includes:

In response to the user equipment triggering the conditional handover, the first data inactivity timer of the source cell corresponding to the conditional handover is continued to be timed.

In some embodiments, the method further includes:

In response to the result of the condition switching performed by the user equipment based on the trigger condition, a corresponding operation is performed.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition is successful, and the method further includes:

In response to the success of the conditional handover performed by the user equipment based on the trigger condition, stop the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the method further includes:

In response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, perform radio resource control RRC connection reestablishment.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the method further includes:

In response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, the user equipment enters an idle state.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the method further includes:

In response to that the conditional handover performed by the user equipment based on the trigger condition fails and the first data inactivity timer of the source cell corresponding to the conditional handover has not expired, the user equipment performs cell Re-elect.

In some embodiments, the target cell for the user equipment to perform the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on a trigger condition; the method further includes:

The user equipment performs handover to the target cell of the condition handover determined by the cell reselection.

In some embodiments, in response to the user equipment triggering the conditional handover, continuing to count the first data inactivity timer of the source cell corresponding to the conditional handover includes:

In response to the user equipment triggering the conditional handover and the user equipment is performing data transmission with the target cell, continue counting the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the method further includes:

In response to the user equipment triggering the conditional handover, the second data inactivity timer of the target cell corresponding to the conditional handover is started.

According to a second aspect of the embodiments of the present disclosure, there is provided a data communication device, which is applied to user equipment, and the device includes: a first timing control module, wherein:

The first timing control module is configured to, in response to the user equipment triggering a conditional handover, continue to time the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the device further includes:

The operation module is configured to perform corresponding operations in response to the result of the condition switching performed by the user equipment based on the trigger condition.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition is successful, and the apparatus further includes:

The second timing control module is configured to stop the first data inactivity timer of the source cell corresponding to the conditional handover in response to the successful conditional handover performed by the user equipment based on the trigger condition.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the apparatus further includes:

The first communication module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, Radio resource control RRC connection reestablishment.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the apparatus further includes:

The state control module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the timeout of the first data inactivity timer of the source cell corresponding to the conditional handover, so that all The user equipment enters the idle state.

In some embodiments, the condition switching performed by the user equipment based on the trigger condition fails, and the apparatus further includes:

The second communication module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover does not expire, Perform cell reselection.

In some embodiments, the target cell for the user equipment to perform the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on a trigger condition; the apparatus further includes:

The third communication module is configured to perform handover to the target cell of the condition handover determined by the cell reselection.

In some embodiments, the first timing control module includes:

The timing control sub-module is configured to respond to the user equipment triggering the conditional handover and the user equipment is performing data transmission with the target cell, and the first data of the source cell corresponding to the conditional handover is not The activity timer continues to count.

In some embodiments, the device further includes:

The third timing control module is configured to, in response to the user equipment triggering the conditional handover, start timing the second data inactivity timer of the target cell corresponding to the conditional handover.

According to a third aspect of the embodiments of the present disclosure, there is provided a communication device including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor, wherein the processor runs all When the executable program is described, the steps of the data communication method described in the first aspect are executed.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a storage medium on which an executable program is stored, wherein the executable program is executed by a processor to implement the steps of the data communication method described in the first aspect.

The data communication method, device, communication equipment and storage medium provided by the embodiments of the present disclosure. In response to the user equipment triggering the conditional handover, the user equipment continues to count the first data inactivity timer of the source cell corresponding to the conditional handover. In this way, when the user equipment is performing the conditional handover process, it continues to count the first data inactivity timer of the source cell, and maintains the synchronization state with the network side data inactivity timer, so that the network side state can be determined, and the network-side state can be determined, and the network-side state can be determined. The misjudgment of the state caused by the asynchronous data inactivity timer on the side, thereby improving the communication efficiency

It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the embodiments of the present disclosure.

Description of the drawings

The drawings herein are incorporated into the specification and constitute a part of the specification, show embodiments in accordance with the present invention, and together with the specification are used to explain the principles of the embodiments of the present invention.

Fig. 1 is a schematic structural diagram showing a communication system according to an exemplary embodiment;

Fig. 2 is a schematic flowchart of a data communication method according to an exemplary embodiment;

Fig. 3 is a schematic flowchart showing another data communication method according to an exemplary embodiment;

Fig. 4 is a schematic flowchart showing a method for user equipment data communication according to an exemplary embodiment;

Fig. 5 is a block diagram showing the structure of a data communication device according to an exemplary embodiment;

Fig. 6 is a block diagram showing a device for data communication according to an exemplary embodiment.

Detailed ways

The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present invention as detailed in the appended claims.

The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms of "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and/or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "when" or "in response to determination".

Please refer to FIG. 1, which shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure. As shown in FIG. 1, the wireless communication system is a communication system based on cellular mobile communication technology. The wireless communication system may include several terminals 11 and several base stations 12.

Wherein, the terminal 11 may be a device that provides voice and/or data connectivity to the user. The terminal 11 can communicate with one or more core networks via a radio access network (Radio Access Network, RAN). The terminal 11 can be an Internet of Things terminal, such as a sensor device, a mobile phone (or “cellular” phone), and The computer of the Internet of Things terminal, for example, may be a fixed, portable, pocket-sized, handheld, built-in computer or vehicle-mounted device. For example, station (Station, STA), subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point, remote terminal ( remote terminal), access terminal (access terminal), user device (user terminal), user agent (user agent), user equipment (user device), or user terminal (user equipment, UE). Alternatively, the terminal 11 may also be a device of an unmanned aerial vehicle. Alternatively, the terminal 11 may also be an in-vehicle device, for example, it may be a trip computer with a wireless communication function, or a wireless communication device connected to the trip computer. Alternatively, the terminal 11 may also be a roadside device, for example, it may be a street lamp, signal lamp, or other roadside device with a wireless communication function.

The base station 12 may be a network side device in a wireless communication system. The wireless communication system may be the 4th generation mobile communication (4G) system, also known as the Long Term Evolution (LTE) system; or, the wireless communication system may also be a 5G system. Also known as new radio (NR) system or 5G NR system. Alternatively, the wireless communication system may also be the next-generation system of the 5G system. Among them, the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network). Or, MTC system.

Among them, the base station 12 may be an evolved base station (eNB) used in a 4G system. Alternatively, the base station 12 may also be a base station (gNB) adopting a centralized and distributed architecture in the 5G system. When the base station 12 adopts a centralized distributed architecture, it usually includes a centralized unit (CU) and at least two distributed units (DU). The centralized unit is provided with a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a media access control (Media Access Control, MAC) layer protocol stack; distribution The unit is provided with a physical (Physical, PHY) layer protocol stack, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.

A wireless connection can be established between the base station 12 and the terminal 11 through a wireless air interface. In different embodiments, the wireless air interface is a wireless air interface based on the fourth-generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth-generation mobile communication network technology (5G) standard, such as The wireless air interface is a new air interface; or, the wireless air interface may also be a wireless air interface based on a 5G-based next-generation mobile communication network technology standard.

In some embodiments, an E2E (End to End) connection may also be established between the terminals 11. For example, V2V (vehicle to vehicle) communication, V2I (vehicle to Infrastructure) communication and V2P (vehicle to pedestrian) communication in vehicle to everything (V2X) communication Waiting for the scene.

In some embodiments, the above-mentioned wireless communication system may further include a network management device 13.

Several base stations 12 are connected to the network management device 13 respectively. The network management device 13 may be a core network device in a wireless communication system. For example, the network management device 13 may be a mobility management entity (Mobility Management Entity) in an Evolved Packet Core (EPC) network. MME). Alternatively, the network management device may also be other core network devices, such as Serving GateWay (SGW), Public Data Network GateWay (PGW), Policy and Charging Rules function unit (Policy and Charging Rules). Function, PCRF) or Home Subscriber Server (HSS), etc. The implementation form of the network management device 13 is not limited in the embodiment of the present disclosure.

The executive bodies involved in the embodiments of the present disclosure include, but are not limited to: user equipment and base stations that use 5G cellular mobile communication technology to communicate.

An application scenario of the embodiment of the present disclosure is that during the cell handover process of 4G cellular mobile communication technology, the network side will send a handover request to the handover target cell according to the measurement report result of the user equipment, and after the target cell confirmation is completed, it will send the handover request to the user equipment Send a handover command, carrying configuration information of a target cell. After the user equipment receives the handover command, the user equipment initiates a random access procedure to the target cell.

In order to improve the robustness of handover, 5G cellular mobile communication technology proposes a conditional handover process (CHO, Conditional HandOver), that is, the network side can configure the handover target cell and handover trigger conditions for the user equipment in advance, and when the handover trigger conditions are met At this time, the user equipment initiates the cell handover by itself, and does not need to send the cell handover command from the network side. The network can configure one or more conditional handover target cells and handover conditions for the user equipment.

When the user equipment fails to perform the conditional handover, the user equipment will perform cell reselection. If the selected cell is the target cell for the conditional handover, the user equipment can try to perform the conditional handover again to the target cell.

When the user equipment triggers the conditional handover process, the MAC information for the source cell will be reset at the same time, including the data inactivity timer. However, the network side does not know that the user equipment has triggered the conditional switch, and will continue to run the data inactivity timer. When the data inactivity timer on the network side expires, the network will consider that the user equipment has entered an idle state, and at the same time release the context of the user equipment, and release all conditional handover cells. If the user equipment performs conditional switching after the data inactivity timer on the network side expires, the conditional switching will inevitably fail, and re-establishment will be performed after the conditional switching fails, resulting in additional interruptions.

As shown in FIG. 2, this exemplary embodiment provides a data communication method, which can be applied to wireless communication user equipment, and the data communication method may include:

Step 201: In response to the user equipment triggering the conditional handover, continue counting the first data inactivity timer of the source cell corresponding to the conditional handover.

The source cell may be the serving cell currently accessed by the user equipment. The user equipment may pre-configure the handover target cell and the handover trigger condition. When the handover trigger condition is reached, the user equipment initiates a conditional handover and tries to access the target cell.

The first data inactivity timer may be a data inactivity timer of the user equipment for the source cell; in an embodiment of the present disclosure, the first data inactivity timer is set in the user equipment, or set in any appropriate In the device and can be obtained by the user's device.

During the user equipment trigger condition handover process, the data inactivity timer for the source cell of the user equipment may not be reset, and the current timing of the data inactivity timer for the source cell of the user equipment is maintained.

The user equipment and the network side can each determine the status of each other according to their own data inactivity timers. In one embodiment, in response to the data inactivity timer not being timed out, the user equipment may determine that the network side has not released the conditional handover cell, so that the user equipment may perform the conditional handover. In another embodiment, in response to the timeout of the data inactivity timer, the network side determines that the user equipment is in an idle state, and therefore releases the conditional handover down zone; the user equipment can determine that the network side has released the conditional handover cell, and the user equipment does not perform the conditional handover . When the user equipment triggers the conditional handover process, the synchronization state of the data inactivity timer of the user equipment and the network side can be maintained. The user equipment can determine whether the network side still maintains the conditional handover cell, and then decides that when the conditional handover fails, the network side data is invalid. Whether the activity timer has timed out and whether it can continue to switch conditions.

Since the network side does not know that the user equipment has triggered the conditional handover, it will continue to run its own data inactivity timer. Therefore, the data inactivity timer of the user equipment for the source cell and the data inactivity timer on the network side can be synchronized. . In one embodiment, in response to the user equipment determining that the data inactivity timer on the network side has not expired, the user equipment may perform conditional switching. In another embodiment, in response to the user equipment determining that the data inactivity timer on the network side has expired, the user equipment may determine that the network side has released the conditional handover cell and no longer performs invalid conditional handover.

In response to the successful handover of the user equipment to the target cell by the conditional handover, the user equipment may stop the timing of the data inactivity timer for the source cell, for example, the data inactivity timer for the source cell may be reset.

Exemplary: the source cell 1 of the UE is the serving cell, and the data inactivity timer is configured for 2 seconds for the user equipment. The source cell 1 configures the conditional switching for the user equipment including:

For target cell 2, the handover condition is: the RSRP of source cell 1 is lower than -98db, and the RSRP of target cell 2 is higher than -98db. The RRC configuration of target cell 2 is all configurations.

For target cell 3, the handover condition is: the RSRP of target cell 3 is 3db higher than that of source cell 1. The RRC configuration of the target cell is a general configuration.

In response to meeting the handover condition of the target cell 2, the user equipment triggers the conditional handover. At this time, the user equipment continues to run the first data inactivity timer corresponding to the source cell 1.

In this way, in response to the user equipment performing the conditional handover, continue the timing of the first data inactivity timer of the user equipment for the source cell 1, so as to synchronize the first data inactivity timer with the network side data inactivity timer, In this way, the user equipment can determine the state of the network side, and reduce the misjudgment of the state due to the non-synchronization with the data inactivity timer on the network side, thereby improving the communication efficiency.

In some embodiments, as shown in FIG. 3, the data communication method may further include:

Step 202: In response to the result of the condition switching performed by the user equipment based on the trigger condition, perform a corresponding operation.

Here, the conditional handover may be a cell handover performed by the user equipment based on a trigger condition. In an embodiment, if the conditional handover is successful, the user equipment can access the target cell. In one embodiment, in response to the failure of the conditional switching, the user equipment may operate according to the first data inactivity timer. For example: in response to a conditional handover failure and the first data inactivity timer has not expired, the user equipment may perform cell reselection to reselect the target cell for access according to the trigger condition; or, in response to the conditional handover failure, the first data inactivity timer When the timer expires, the user equipment enters an idle state or the user equipment performs RRC connection re-establishment.

In some embodiments, the conditional handover performed by the user equipment based on the trigger condition is successful, and the data communication method may further include: in response to the conditional handover performed by the user equipment based on the trigger condition successfully, stopping the first data corresponding to the source cell of the conditional handover Inactive timer.

In response to a successful conditional handover, the user equipment can stop the first data inactivity timer of the source cell corresponding to the conditional handover, saving resources.

In some embodiments, the conditional handover performed by the user equipment based on the trigger condition fails, and the data communication method may further include: responding to the failure of the conditional handover performed by the user equipment based on the trigger condition and the first data corresponding to the source cell of the conditional handover is inactive When the timer expires, the radio resource control RRC connection is reestablished.

If the user equipment fails to perform conditional handover and the first data inactivity timer expires, it can be determined that the inactivity timer on the network side has also timed out, and the network side has released the context of the user equipment and releases all conditional handover cells. If you continue to try conditional switching at this time, the conditional switching will inevitably fail. Therefore, the RRC connection re-establishment can be performed directly, that is, the cell is reselected to access and the RRC connection is established.

Exemplary: the source cell 1 of the UE is the serving cell, and the data inactivity timer is configured for 2 seconds for the user equipment. The source cell 1 configures the conditional switching for the user equipment including:

For target cell 2, the handover condition is: the RSRP of source cell 1 is lower than -98db, and the RSRP of target cell 2 is higher than -98db. The RRC configuration of target cell 2 is all configurations.

For target cell 3, the handover condition is: the RSRP of target cell 3 is 3db higher than that of source cell 1. The RRC configuration of the target cell is a general configuration.

In response to the current state meeting the handover condition of the target cell 2, the user equipment triggers the conditional handover. At this time, the user equipment continues to run the data inactivity timer configured corresponding to the source cell 1.

If the user equipment fails to switch the conditions, the user equipment determines that the data inactivity timer expires at this time, and the user equipment performs RRC connection reestablishment.

In this way, it is possible to reduce invalid condition switching attempts in a state where the condition switching fails and the data inactivity timer expires, thereby reducing communication interruptions and improving communication quality.

In some embodiments, the user equipment fails to perform condition switching based on the trigger condition, and the data communication method may further include:

In response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, the user equipment enters an idle state.

In response to the failure of the user equipment to switch the conditions and the timeout of the first data inactivity timer, it can be determined that the inactivity timer on the network side has also timed out, and the network side determines that the user equipment is in an idle state. If you continue to try conditional switching at this time, the probability of failure of conditional switching is very high. Therefore, in response to the failure of the user equipment to perform the conditional handover, the user equipment can continue to camp in the source cell; and when the first data inactivity timer has not expired, the user equipment can continue to perform the conditional handover. It may be specified in the communication protocol whether the user equipment establishes an RRC connection with the reselected cell or enters an idle state when the conditional handover of the user equipment fails and the first data inactivity timer expires. The state of the user equipment is pre-selected through the communication protocol, so that the user equipment can be selected according to requirements, and is not limited to be fixed in one state.

Exemplary: the source cell 1 of the UE is the serving cell, and the data inactivity timer is configured for 2 seconds for the user equipment. The source cell 1 configures the conditional switching for the user equipment including:

For target cell 2, the handover condition is: the RSRP of source cell 1 is lower than -98db, and the RSRP of target cell 2 is higher than -98db. The RRC configuration of target cell 2 is all configurations.

For target cell 3, the handover condition is: the RSRP of target cell 3 is 3db higher than that of source cell 1. The RRC configuration of the target cell is a general configuration.

In response to the current state meeting the handover condition of the target cell 2, the user equipment triggers the conditional handover. At this time, the user equipment continues to count the first data inactivity timer for the source cell 1.

If the user equipment fails to switch the conditions, the user equipment judges that the data inactivity timer expires at this time, and the user equipment enters the idle state.

In this way, when the condition switching fails and the data inactivity timer expires, the invalid condition switching attempts are reduced, thereby reducing communication interruptions and improving communication quality.

In some embodiments, the conditional handover performed by the user equipment based on the trigger condition fails, and the data communication method may further include: responding to the failure of the conditional handover performed by the user equipment based on the trigger condition and the first data corresponding to the source cell of the conditional handover fails. The activity timer does not expire, and the user equipment performs cell reselection.

The first data inactivity timer does not expire, and the user equipment can reselect a target cell for access.

In some embodiments, the target cell for the user equipment to perform the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on the trigger condition; the data communication method may further include: the user equipment performs handover according to the condition determined by the cell reselection To switch over to the target cell.

In response to the first data inactivity timer not expiring, the user equipment may reselect a target cell for access according to the handover condition of the conditional handover among the target cells provided by the source cell.

In some embodiments, step 201 may include:

In response to the user equipment triggering the conditional handover and the user equipment is performing data transmission with the target cell, the first data inactivity timer of the source cell corresponding to the conditional handover is continued to be timed.

After the user equipment triggers the condition switch, it performs data transmission with any cell including the source cell without restarting the first data inactivity timer. In this way, the first data inactivity timer and the network side data inactivity timing can be maintained The device stays in sync.

In some embodiments, the data communication method may further include: in response to the user equipment triggering the conditional handover, starting the second data inactivity timer of the target cell corresponding to the conditional handover.

After the user equipment triggers the conditional handover, the user equipment can maintain two data inactivity timers, one corresponding to the source cell and one corresponding to the target cell of the conditional handover.

In this way, on the one hand, the synchronization state with the data inactivity timer on the network side can be maintained, so that the state on the network side can be determined, and the misjudgment of the state due to the non-synchronization with the data inactivity timer on the network side can be reduced, and the communication efficiency can be improved. On the one hand, the synchronization state of the data inactivity timer of the target cell can be maintained to realize data communication with the target cell.

In some embodiments, the data communication method may further include: in response to the timeout of the first data inactivity timer, stopping the first data inactivity timer.

In response to the timeout of the first data inactivity timer, the first data inactivity timer is stopped; synchronization can be achieved with the network side data inactivity timer. When the first data inactivity timer is stopped, the timeout stop state of the first data inactivity timer can be recorded, and the user equipment can determine whether the first data inactivity timer is in the timeout stop state by recording, and determine whether to establish a connection with the reselected cell. RRC connects or enters idle state.

A specific example is provided below in conjunction with any of the foregoing embodiments:

The specific steps of the data communication method provided in this example, as shown in Figure 4, include:

Step 401: In response to the user equipment triggering conditional handover, continue to run the data inactivity timer configured for the source cell. For data transmission and data reception of the user equipment, the data inactivity timer is no longer restarted. When the condition switch is completed, stop the data inactivity timer. If the data inactivity timer expires, the timer will not be restarted.

Step 402: In response to a conditional switching failure and the data inactivity timer expires, the user equipment performs RRC connection reestablishment; Step 403: In response to a conditional switching failure and the data inactivity timer expires, the user equipment enters an idle state.

The agreement stipulates that the user equipment reestablishes the RRC connection or enters an idle state.

The user equipment can maintain two data inactivity timers, one corresponding to the source cell and one corresponding to the target cell of the conditional handover.

In a specific example:

The source cell 1 of the UE is the serving cell, and the data inactivity timer is configured for the user equipment to be 2 seconds. The source cell 1 configures the conditional switching for the user equipment including:

1. For target cell 2, the handover condition is: the RSRP of source cell 1 is lower than -98db, and the RSRP of target cell 2 is higher than -98db. The RRC configuration of target cell 2 is all configurations.

2. For target cell 3, the handover condition is: the RSRP of target cell 3 is 3db higher than that of source cell 1. The RRC configuration of the target cell is a general configuration.

In response to the current state meeting the handover condition of the target cell 2, the user equipment triggers the conditional handover. At this time, the user equipment continues to run the data inactivity timer corresponding to the source cell 1.

If the conditional handover fails and the data inactivity timer has not expired, the user equipment performs cell selection. If the cell selection result is target cell 3, then conditional handover to target cell 3 is performed.

If the condition switching fails and the data inactivity timer expires, the user equipment records the timeout information.

If the condition switching fails and the data inactivity timer expires, the user equipment performs RRC connection re-establishment.

In another specific example:

The source cell 1 of the UE is the serving cell, and the data inactivity timer is configured for the user equipment to be 2 seconds. The source cell 1 configures the conditional switching for the user equipment including:

1. For target cell 2, the handover condition is: the RSRP of source cell 1 is lower than -98db, and the RSRP of target cell 2 is higher than -98db. The RRC configuration of target cell 2 is all configurations.

2. For target cell 3, the handover condition is: the RSRP of target cell 3 is 3db higher than that of source cell 1. The RRC configuration of the target cell is a general configuration.

In response to the current state meeting the handover condition of target cell 3, the user equipment triggers the conditional handover and runs two data inactivity timers, one corresponding to source cell 1, that is, continuing to run the data inactivity timer configured in cell 1; the other corresponds to The target cell for conditional handover is target cell 3.

The data inactivity timer corresponding to the source cell 1 times out, and the user equipment records the time out information.

If the condition switching fails and the data inactivity timer has expired, the user equipment performs RRC connection re-establishment.

The embodiment of the present invention also provides a data communication device, which is applied to user equipment for wireless communication. FIG. 5 is a schematic diagram of the composition structure of the data communication device 100 provided by an embodiment of the present invention; as shown in FIG. 5, the device 100 includes: A certain time control module 110, in which,

The first timing control module 110 is configured to, in response to the user equipment triggering the conditional handover, continue to count the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the device further includes:

The operation module 120 is configured to perform corresponding operations in response to the result of the condition switching performed by the user equipment based on the trigger condition.

In some embodiments, the user equipment successfully performs condition switching based on the trigger condition, and the apparatus 100 further includes:

The second timing control module 130 is configured to stop the first data inactivity timer of the source cell corresponding to the conditional handover in response to the successful conditional handover performed by the user equipment based on the trigger condition.

In some embodiments, the user equipment fails to perform condition switching based on the trigger condition, and the apparatus 100 further includes:

The first communication module 140 is configured to perform radio resource control RRC connection reestablishment in response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the user equipment fails to perform condition switching based on the trigger condition, and the apparatus 100 further includes:

The state control module 150 is configured to enter the idle state in response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the user equipment fails to perform condition switching based on the trigger condition, and the apparatus 100 further includes:

The second communication module 160 is configured to perform cell reselection in response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover has not expired.

In some embodiments, the target cell for the user equipment to perform the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on the trigger condition; the apparatus 100 further includes:

The third communication module 170 is configured to perform handover to the target cell for handover determined by the cell reselection condition.

In some embodiments, the first timing control module 110 includes:

The timing control sub-module 111 is configured to respond to the user equipment triggering conditional handover and the user equipment is performing data transmission with the target cell, and continue timing the first data inactivity timer of the source cell corresponding to the conditional handover.

In some embodiments, the apparatus 100 further includes:

The third timing control module 180 is configured to, in response to the user equipment triggering the conditional handover, start timing the second data inactivity timer of the target cell corresponding to the conditional handover.

In an exemplary embodiment, the first timing control module 110, the operation module 120, the second timing control module 130, the first communication module 140, the state control module 150, the second communication module 160, the third communication module 170, and the third The timing control module 180, etc. can be configured by one or more central processing units (CPU, Central Processing Unit), graphics processing unit (GPU, Graphics Processing Unit), baseband processor (BP, baseband processor), application specific integrated circuit (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), Complex Programmable Logic Device (CPLD, Complex Programmable Logic Device), Field Programmable Gate Array (FPGA, Field-Programmable Gate Array), General Purpose It is implemented by a processor, a controller, a microcontroller (MCU, Micro Controller Unit), a microprocessor (Microprocessor), or other electronic components, and is used to execute the foregoing method.

Fig. 6 is a block diagram showing a device 3000 for data communication according to an exemplary embodiment. For example, the device 3000 may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

6, the device 3000 may include one or more of the following components: a processing component 3002, a memory 3004, a power supply component 3006, a multimedia component 3008, an audio component 3010, an input/output (I/O) interface 3012, a sensor component 3014, And the communication component 3016.

The processing component 3002 generally controls the overall operations of the device 3000, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 3002 may include one or more processors 3020 to execute instructions to complete all or part of the steps of the foregoing method. In addition, the processing component 3002 may include one or more modules to facilitate the interaction between the processing component 3002 and other components. For example, the processing component 3002 may include a multimedia module to facilitate the interaction between the multimedia component 3008 and the processing component 3002.

The memory 3004 is configured to store various types of data to support the operation of the device 3000. Examples of such data include instructions for any application or method operating on the device 3000, contact data, phone book data, messages, pictures, videos, etc. The memory 3004 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.

The power supply component 3006 provides power for various components of the device 3000. The power supply component 3006 may include a power management system, one or more power supplies, and other components associated with the generation, management, and distribution of power for the device 3000.

The multimedia component 3008 includes a screen that provides an output interface between the device 3000 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor can not only sense the boundary of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 3008 includes a front camera and/or a rear camera. When the device 3000 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 3010 is configured to output and/or input audio signals. For example, the audio component 3010 includes a microphone (MIC), and when the device 3000 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio signals. The received audio signal may be further stored in the memory 3004 or transmitted via the communication component 3016. In some embodiments, the audio component 3010 further includes a speaker for outputting audio signals.

The I/O interface 3012 provides an interface between the processing component 3002 and a peripheral interface module. The above-mentioned peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume button, start button, and lock button.

The sensor assembly 3014 includes one or more sensors for providing the device 3000 with various aspects of status assessment. For example, the sensor component 3014 can detect the on/off status of the device 3000 and the relative positioning of components, such as the display and keypad of the device 3000. The sensor component 3014 can also detect the position change of the device 3000 or a component of the device 3000. The presence or absence of contact with the device 3000, the orientation or acceleration/deceleration of the device 3000, and the temperature change of the device 3000. The sensor assembly 3014 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact. The sensor component 3014 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 3014 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.

The communication component 3016 is configured to facilitate wired or wireless communication between the device 3000 and other devices. The device 3000 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 3016 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3016 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the device 3000 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable A gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components are implemented to implement the above methods.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as the memory 3004 including instructions, and the foregoing instructions may be executed by the processor 3020 of the device 3000 to complete the foregoing method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other implementations of the embodiments of the present invention. This application is intended to cover any variations, uses, or adaptive changes of the embodiments of the present invention. These variations, uses, or adaptive changes follow the general principles of the embodiments of the present invention and include those in the technical field that are not disclosed in the embodiments of the present disclosure. Common knowledge or conventional technical means. The description and the embodiments are only regarded as exemplary, and the true scope and spirit of the embodiments of the present invention are pointed out by the following claims.

It should be understood that the embodiments of the present invention are not limited to the precise structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present invention is only limited by the appended claims.

Claims (20)

A data communication method, wherein, applied to a user equipment, the method includes: In response to the user equipment triggering the conditional handover, the first data inactivity timer of the source cell corresponding to the conditional handover is continued to be timed. The method according to claim 1, further comprising: In response to the result of the condition switching performed by the user equipment based on the trigger condition, a corresponding operation is performed. The method according to claim 1 or 2, wherein the conditional handover performed by the user equipment based on a trigger condition is successful, and the method further comprises: In response to the success of the conditional handover performed by the user equipment based on the trigger condition, stop the first data inactivity timer of the source cell corresponding to the conditional handover. The method according to claim 1 or 2, wherein the conditional handover performed by the user equipment based on a trigger condition fails, and the method further comprises: In response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, perform radio resource control RRC connection reestablishment. The method according to claim 1 or 2, wherein the conditional handover performed by the user equipment based on a trigger condition fails, and the method further comprises: In response to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, the user equipment enters an idle state. The method according to claim 1 or 2, wherein the conditional handover performed by the user equipment based on a trigger condition fails, and the method further comprises: In response to that the conditional handover performed by the user equipment based on the trigger condition fails and the first data inactivity timer of the source cell corresponding to the conditional handover has not expired, the user equipment performs cell Re-election. The method according to claim 6, wherein the target cell for the user equipment to perform the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on a trigger condition; the method further include: The user equipment performs handover to the target cell of the condition handover determined by the cell reselection. The method according to claim 1 or 2, wherein, in response to the user equipment triggering conditional handover, continuing to count the first data inactivity timer of the source cell corresponding to the conditional handover comprises: In response to the user equipment triggering the conditional handover and the user equipment is performing data transmission with the target cell, continue counting the first data inactivity timer of the source cell corresponding to the conditional handover. The method according to claim 1 or 2, wherein the method further comprises: In response to the user equipment triggering the conditional handover, the second data inactivity timer of the target cell corresponding to the conditional handover is started. A data communication device, wherein, applied to user equipment, the device includes: a first timing control module, wherein: The first timing control module is configured to, in response to the user equipment triggering a conditional handover, continue to time the first data inactivity timer of the source cell corresponding to the conditional handover. The device according to claim 10, further comprising: The operation module is configured to perform corresponding operations in response to the result of the condition switching performed by the user equipment based on the trigger condition. The apparatus according to claim 10 or 11, wherein the conditional handover performed by the user equipment based on a trigger condition is successful, and the apparatus further comprises: The second timing control module is configured to stop the first data inactivity timer of the source cell corresponding to the conditional switch in response to the success of the conditional handover performed by the user equipment based on the trigger condition. The apparatus according to claim 10 or 11, wherein the condition switching performed by the user equipment based on a trigger condition fails, and the apparatus further comprises: The first communication module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the expiration of the first data inactivity timer of the source cell corresponding to the conditional handover, Radio resource control RRC connection reestablishment. The apparatus according to claim 10 or 11, wherein the condition switching performed by the user equipment based on a trigger condition fails, and the apparatus further comprises: The state control module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the timeout of the first data inactivity timer of the source cell corresponding to the conditional handover, so that all The user equipment enters the idle state. The apparatus according to claim 10 or 11, wherein the condition switching performed by the user equipment based on a trigger condition fails, and the apparatus further comprises: The second communication module is configured to respond to the failure of the conditional handover performed by the user equipment based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover does not expire, Perform cell reselection. The apparatus according to claim 15, wherein the target cell for which the user equipment performs the conditional handover determined by the cell reselection is the target cell when the user equipment performs the conditional handover based on a trigger condition; the apparatus further include: The third communication module is configured to perform handover to the target cell of the condition handover determined by the cell reselection. The device according to claim 10 or 11, wherein the first timing control module comprises: The timing control sub-module is configured to respond to the user equipment triggering the conditional handover and the user equipment is performing data transmission with the target cell, and the first data of the source cell corresponding to the conditional handover is not The activity timer continues to count. The device according to claim 10 or 11, wherein the device further comprises: The third timing control module is configured to, in response to the user equipment triggering the conditional handover, start timing the second data inactivity timer of the target cell corresponding to the conditional handover. A communication device, comprising a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor, wherein the processor executes the executable program when running the executable program as claimed in claims 1 to 9. Steps of any of the data communication methods. A storage medium on which an executable program is stored, wherein the executable program is executed by a processor to implement the steps of the data communication method according to any one of claims 1 to 9.

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