CN111345068A - Data communication method, device, communication equipment and storage medium - Google Patents
Data communication method, device, communication equipment and storage medium Download PDFInfo
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- CN111345068A CN111345068A CN202080000250.9A CN202080000250A CN111345068A CN 111345068 A CN111345068 A CN 111345068A CN 202080000250 A CN202080000250 A CN 202080000250A CN 111345068 A CN111345068 A CN 111345068A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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Abstract
The disclosed embodiments relate to a data communication method, an apparatus, a communication device and a storage medium. In response to the user equipment triggering a conditional handover, continuing to count a first data inactivity timer of a source cell corresponding to the conditional handover.
Description
Technical Field
The present application relates to the field of wireless communication technologies, but not limited to the field of wireless communication technologies, and in particular, to a data communication method, apparatus, communication device, and storage medium.
Background
The user equipment in the connected state enters the idle state in two ways, one of which is: the network side sends a Radio Resource Control (RRC) connection release message, and the ue can release the RRC connection after receiving the message, where the other is: when the data inactivity timer configured for the user equipment by the base station is overtime, the user equipment automatically releases the RRC connection and enters an idle state, that is, no data or control signaling is sent within a period of time, and the user equipment can automatically release the RRC connection. The network side and the user equipment can synchronously maintain a data inactivity timer and maintain a consistent user equipment state.
The data inactivity timer may be triggered to restart by:
1: a Media Access Control (MAC) receives a MAC Service Data Unit (SDU) of a Dedicated Traffic Channel (DTCH), a Dedicated Control Channel (DCCH), and a Common Control Channel (CCCH Common Control Channel);
2: MAC sends DTCH, MAC SDU of DCCH channel.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a data communication method, apparatus, communication device and storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a data communication method, where the method is applied to a user equipment, and the method includes:
in response to the user equipment triggering a conditional handover, continuing to count a first data inactivity timer of a source cell corresponding to the conditional handover.
In some embodiments, the method further comprises:
and responding to the result of the condition switching performed by the user equipment based on the trigger condition, and performing corresponding operation.
In some embodiments, the conditional handover by the user equipment based on a trigger condition is successful, the method further comprising:
stopping the first data inactivity timer of the source cell corresponding to the conditional handover in response to the conditional handover by the user equipment based on the trigger condition being successful.
In some embodiments, the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
performing a radio resource control, RRC, connection reestablishment in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover times out.
In some embodiments, the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
in response to the user equipment failing the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover times out, the user equipment entering an idle state.
In some embodiments, the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
in response to the conditional handover also being failed by the user equipment based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover not being expired, the user equipment performs 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 method further comprises the following steps:
and the user equipment carries out switching to the target cell of the conditional switching determined by the cell reselection.
In some embodiments, said continuing to time the first data inactivity timer of the source cell corresponding to the conditional handover in response to the user equipment triggering the conditional handover comprises:
in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with a target cell, continuing to count the first data inactivity timer of the source cell corresponding to the conditional handover.
In some embodiments, the method further comprises:
and in response to the user equipment triggering the conditional handover, starting a second data inactivity timer of a target cell corresponding to the conditional handover.
According to a second aspect of the embodiments of the present disclosure, there is provided a data communication apparatus, where the apparatus is applied to a user equipment, the apparatus including: a first timing control module, wherein,
the first timing control module is configured to, in response to the user equipment triggering a conditional handover, keep timing a first data inactivity timer of a source cell corresponding to the conditional handover.
In some embodiments, the apparatus further comprises:
and the operation module is configured to respond to the result of the condition switching performed by the user equipment based on the trigger condition to perform corresponding operation.
In some embodiments, the conditional handover by the user equipment based on a trigger condition is successful, the apparatus further comprises:
a second timing control module configured to stop the first data inactivity timer of the source cell corresponding to the conditional handover in response to the conditional handover by the user equipment based on the trigger condition being successful.
In some embodiments, the conditional handover by the ue based on a trigger condition fails, the apparatus further comprises:
a first communication module configured to perform radio resource control, RRC, connection reestablishment in response to failure of the conditional handover by the user equipment based on the trigger condition and timeout of the first data inactivity timer of the source cell corresponding to the conditional handover.
In some embodiments, the conditional handover by the ue based on a trigger condition fails, the apparatus further comprises:
a state control module configured to cause the user equipment to enter an idle state in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover being expired.
In some embodiments, the conditional handover by the ue based on a trigger condition fails, the apparatus further comprises:
a second communication module configured to perform cell reselection in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover not being 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 a trigger condition; the device further comprises:
and the third communication module is configured to perform handover to a target cell of the conditional handover determined by the cell reselection.
In some embodiments, the first timing control module comprises:
a timing control sub-module configured to continue timing the first data inactivity timer of the source cell corresponding to the conditional handover in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with a target cell.
In some embodiments, the apparatus further comprises:
and the third timing control module is configured to respond to the user equipment triggering the conditional handover and start to time a 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 executed by the processor, wherein the processor executes the executable program to perform the steps of the data communication method according to the first aspect.
According to a fourth aspect of embodiments of the present disclosure, there is provided a storage medium having stored thereon an executable program, wherein the executable program, when executed by a processor, implements the steps of the data communication method according to the first aspect.
The embodiment of the disclosure provides a data communication method, a data communication device, a communication device and a storage medium. And the user equipment responds to the user equipment triggering the conditional switching, and continues to count the first data inactivity timer of the source cell corresponding to the conditional switching. Therefore, when the user equipment carries out the condition switching process, the user equipment continues to count the first data inactivity timer of the source cell and maintains the synchronous state of the first data inactivity timer and the network side data inactivity timer, so that the network side state can be determined, the state misjudgment condition caused by the asynchronism of the first data inactivity timer and the network side data inactivity timer is reduced, and the communication efficiency is further improved
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of embodiments of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the embodiments.
FIG. 1 is a block diagram illustrating a communication system in accordance with an exemplary embodiment;
FIG. 2 is a flow diagram illustrating a method of data communication in accordance with an exemplary embodiment;
FIG. 3 is a flow diagram illustrating another method of data communication in accordance with an exemplary embodiment;
FIG. 4 is a flowchart illustrating a user equipment data communication method according to an example embodiment;
FIG. 5 is a block diagram illustrating a data communication device in accordance with an exemplary embodiment;
fig. 6 is a block diagram illustrating an apparatus for data communication in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of embodiments of the invention, as detailed in the following claims.
The terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information in the embodiments of the present disclosure, such information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: several terminals 11 and several base stations 12.
Terminal 11 may refer to, among other things, a device that provides voice and/or data connectivity to a user. The terminal 11 may communicate with one or more core networks via a Radio Access Network (RAN), and the terminal 11 may be an internet of things terminal, such as a sensor device, a mobile phone (or referred to as a "cellular" phone), and a computer having the internet of things terminal, and may be a fixed, portable, pocket, handheld, computer-included, or vehicle-mounted device, for example. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile), a remote Station (remote Station), an access point, a remote terminal (remote), an access terminal (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user terminal (UE). Alternatively, the terminal 11 may be a device of an unmanned aerial vehicle. Alternatively, the terminal 11 may also be a vehicle-mounted device, for example, a vehicle computer with a wireless communication function, or a wireless communication device externally connected to the vehicle computer. Alternatively, the terminal 11 may be a roadside device, for example, a street lamp, a 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 a fourth generation mobile communication (4G) system, which is also called a Long Term Evolution (LTE) system; alternatively, the wireless communication system can be a 5G system, which is also called a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a next-generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network, New Generation Radio Access Network). Alternatively, an MTC system.
The base station 12 may be an evolved node b (eNB) used in a 4G system. Alternatively, the base station 12 may be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 12 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are provided in the central unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present disclosure does not limit the specific implementation manner of the base station 12.
The base station 12 and the terminal 11 may establish a wireless connection over a wireless air interface. In various embodiments, the wireless air interface is based on a fourth generation mobile communication network technology (4G) standard; or the wireless air interface is based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.
In some embodiments, an E2E (End to End) connection may also be established between terminals 11. Scenarios such as V2V (vehicle to vehicle) communication, V2I (vehicle to Infrastructure) communication, and V2P (vehicle to vehicle) communication in vehicle networking communication (V2X).
In some embodiments, the wireless communication system may further include a network management device 13.
The execution subject that this disclosed embodiment relates to includes but not limited to: user equipment and base stations which communicate by using 5G cellular mobile communication technology.
An application scenario of the embodiment of the present disclosure is that, in a cell handover process of a 4G cellular mobile communication technology, a network side sends a handover request to a handover target cell according to a measurement report result of a user equipment, and after a target cell confirms that the handover request is completed, a handover command is sent to the user equipment, where the handover command carries configuration information of the target cell. After the user equipment receives the switching command, the user equipment initiates a random access process to the target cell.
In order to improve the robustness of the HandOver, the 5G cellular mobile communication technology provides a Conditional HandOver (CHO) based HandOver process, that is, a network side can configure a HandOver target cell and a HandOver trigger condition for a user equipment in advance, and when the HandOver trigger condition is satisfied, the user equipment initiates cell HandOver by itself without the network side sending a cell HandOver command again. The network may 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 performs cell reselection, and if the selected cell is a target cell of the conditional handover, the user equipment may try the conditional handover again to the target cell.
In the process of triggering the condition handover by the ue, the MAC information for the source cell, including the data inactivity timer, is simultaneously reset. However, the network side does not know that the ue triggered the conditional handover and will continue to run the data inactivity timer. When the data inactivity timer at the network side is overtime, the network considers that the user equipment has entered an idle state, and simultaneously releases the context of the user equipment and releases all conditional handover cells. If the user equipment performs the conditional switch after the network side data inactivity timer is overtime, the conditional switch will inevitably fail, and the reconstruction will be performed after the conditional switch fails, resulting in additional interruption.
As shown in fig. 2, the present exemplary embodiment provides a data communication method, which may be applied to a user equipment for wireless communication, and the data communication method may include:
step 201: and in response to the user equipment triggering the conditional switch, continuing to count the first data inactivity timer of the source cell corresponding to the conditional switch.
The source cell can be a service cell accessed by the user equipment at present, the user equipment can configure a target cell for switching and a switching trigger condition in advance, and when the switching trigger condition is reached, the user equipment initiates condition switching by itself 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 one embodiment of the present disclosure, the first data inactivity timer is provided within the user equipment, or within any appropriate device and available to the user equipment.
In the process of triggering the condition handover by the ue, the data inactivity timer of the ue for the source cell may not be reset, and the current timing of the data inactivity timer of the ue for the source cell is maintained.
The user equipment and the network side can mutually determine the state of each other according to the data inactivity timer of the user equipment and the network side. In one embodiment, in response to the data inactivity timer not being expired, the ue may determine that the network side does not release the conditional handover cell, and thus, the ue may perform the conditional handover. In another embodiment, in response to the timeout of the data inactivity timer, the network side determines that the ue is in an idle state, thereby releasing the conditional handover drop zone; the user equipment may determine that the network side has released the conditional handover cell and the user equipment does not perform the conditional handover. In the process of triggering the conditional switch by the user equipment, the synchronization state of the data inactivity timers of the user equipment and the network side can be kept, and the user equipment can determine whether the network side still maintains the conditional switch cell or not, so as to determine whether the data inactivity timer of the network side is overtime or not and whether the conditional switch can be continued or not when the conditional switch fails.
Since the network side does not know that the ue triggers the conditional handover and continues to run its own data inactivity timer, the data inactivity timer of the ue for the source cell and the data inactivity timer of the network side can be kept synchronized. In one embodiment, the user equipment may perform the conditional handover in response to the user equipment determining that the data inactivity timer on the network side has not expired. In another embodiment, in response to the ue determining that the data inactivity timer on the network side expires, the ue may determine that the network side has released the conditional handover cell and no longer performs the invalid conditional handover.
In response to the user equipment successfully performing the conditional handover to the target cell, the user equipment may stop the timing of the data inactivity timer for the source cell, such as: the data inactivity timer for the source cell may be reset.
The following are exemplary: the source cell 1 of the UE, i.e. the serving cell, configures the data inactivity timer for the UE to be 2 seconds. The source cell 1 configuring conditional switching for the user equipment comprises:
the target cell 2, the handover condition is: the RSRP of the source cell 1 is lower than-98 db and the RSRP of the target cell 2 is higher than-98 db. The RRC configuration of the target cell 2 is fully configured.
And the target cell 3, the switching conditions are as follows: the RSRP of the target cell 3 is 3db higher than that of the source cell 1. The RRC configuration of the target cell is a generic configuration.
In response to the handover condition of the target cell 2 being met, the user equipment triggers a conditional handover, at which point the user equipment continues to run the first data inactivity timer corresponding to the source cell 1.
Therefore, the timing of the first data inactivity timer of the user equipment aiming at the source cell 1 is continued in response to the condition switching of the user equipment, so that the first data inactivity timer and the network side data inactivity timer are in a synchronous state, the user equipment can determine the state of the network side, the state misjudgment condition caused by the asynchronization of the user equipment and the network side data inactivity timer is reduced, and the communication efficiency is improved.
In some embodiments, as shown in fig. 3, the data communication method may further include: :
step 202: and responding to the result of the condition switching performed by the user equipment based on the trigger condition, and performing corresponding operation.
Here, the conditional handover may be cell handover by the user equipment based on a trigger condition. In one embodiment, the ue may access the target cell if the conditional handover is successful. In one embodiment, in response to a conditional handover failure, the user equipment may operate according to a first data inactivity timer. For example: in response to the condition switching failure and the first data inactivity timer not being overtime, the user equipment may perform cell reselection to reselect the target cell for access according to a trigger condition; or, in response to the timeout of the first data inactivity timer in the conditional handover failure, the ue enters an idle state or the ue performs RRC connection reestablishment.
In some embodiments, the user equipment succeeds in conditional handover based on the trigger condition, and the data communication method may further include: in response to a success of the conditional handover by the user equipment based on the trigger condition, stopping a first data inactivity timer of a source cell corresponding to the conditional handover.
In response to the conditional handover being successful, the user equipment may stop the first data inactivity timer corresponding to the source cell of the conditional handover, saving resources.
In some embodiments, the user equipment fails to perform the conditional handover based on the trigger condition, and the data communication method may further include: and responding to the failure of the condition switching based on the triggering condition of the user equipment and the timeout of a first data inactivity timer of a source cell corresponding to the condition switching, and performing the RRC connection reestablishment.
If the ue fails to perform the conditional handover and the first data inactivity timer expires, it may be determined that the inactivity timer of the network side also expires, and the network side releases the context of the ue and releases all the conditional handover cells. If the conditional switch is continuously attempted at this time, the conditional switch inevitably fails. Therefore, RRC connection re-establishment, i.e. cell reselection access and RRC connection establishment, can be directly performed.
The following are exemplary: the source cell 1 of the UE, i.e. the serving cell, configures the data inactivity timer for the UE to be 2 seconds. The source cell 1 configuring conditional switching for the user equipment comprises:
the target cell 2, the handover condition is: the RSRP of the source cell 1 is lower than-98 db and the RSRP of the target cell 2 is higher than-98 db. The RRC configuration of the target cell 2 is fully configured.
And the target cell 3, the switching conditions are as follows: the RSRP of the target cell 3 is 3db higher than that of the source cell 1. The RRC configuration of the target cell is a generic configuration.
In response to the current state satisfying the handover condition of the target cell 2, the user equipment triggers a conditional handover, at which point the user equipment continues to run the data inactivity timer configured corresponding to the source cell 1.
If the user equipment fails to perform the condition switching, the user equipment judges that the data inactivity timer is overtime at the moment, and then the user equipment performs RRC connection reconstruction.
Therefore, invalid condition switching attempts can be reduced in a state that the condition switching fails and the data inactivity timer is overtime, so that communication interruption is reduced, and communication quality is improved.
In some embodiments, the user equipment fails to perform the conditional handover based on the trigger condition, and the data communication method may further include:
and in response to the failure of the conditional handover of 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, the user equipment enters an idle state.
In response to that the ue fails to perform the conditional handover and the first data inactivity timer expires, it may be determined that the inactivity timer of the network side has also expired, and the network side determines that the ue is in an idle state. If the conditional switch is continuously attempted at this time, the probability of failure of the conditional switch is very high. Therefore, in response to a failure of the user equipment to perform the conditional handover, the user equipment may continue to camp on the source cell; and in the state that the first data inactivity timer is not overtime, the user equipment can continue to perform conditional switching. 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 times out. The state of the user equipment is preselected through a communication protocol, so that the user equipment can be selected according to requirements and is not limited to be fixed in one state.
The following are exemplary: the source cell 1 of the UE, i.e. the serving cell, configures the data inactivity timer for the UE to be 2 seconds. The source cell 1 configuring conditional switching for the user equipment comprises:
the target cell 2, the handover condition is: the RSRP of the source cell 1 is lower than-98 db and the RSRP of the target cell 2 is higher than-98 db. The RRC configuration of the target cell 2 is fully configured.
And the target cell 3, the switching conditions are as follows: the RSRP of the target cell 3 is 3db higher than that of the source cell 1. The RRC configuration of the target cell is a generic configuration.
In response to the current state satisfying the handover condition of the target cell 2, the user equipment triggers a conditional handover, at which time the timing of the first data inactivity timer for the source cell 1 of the user equipment is continued.
If the user equipment fails to switch the conditions, the user equipment judges that the data inactivity timer is overtime at the moment, and then the user equipment enters an idle state.
Therefore, under the condition that the condition switching fails and the data inactivity timer is overtime, invalid condition switching attempts are reduced, communication interruption is reduced, and communication quality is improved.
In some embodiments, the user equipment fails to perform the conditional handover based on the trigger condition, and the data communication method may further include: in response to the conditional handover also failed 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, the user equipment performs cell reselection.
The first data inactivity timer does not time out and the user equipment may reselect a target cell for access.
In some embodiments, the target cell for the conditional handover determined by the user equipment for cell reselection is a target cell when the user equipment performs the conditional handover based on a trigger condition; the data communication method may further include: and the user equipment carries out switching according to the target cell switched under the condition determined by the cell reselection.
In response to the first data inactivity timer not timing out, the user equipment may reselect one target cell for access according to a handover condition of the conditional handover from among target cells provided by the source cell.
In some embodiments, step 201 may comprise:
and in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with the target cell, continuing to count the first data inactivity timer of the source cell corresponding to the conditional handover.
After the user equipment triggers the condition switching, the user equipment performs data transmission with any cell including the source cell, and does not restart the first data inactivity timer, so that the first data inactivity timer can be kept synchronous with the data inactivity timer at the network side.
In some embodiments, the data communication method may further include: and in response to the user equipment triggering the conditional handover, starting a second data inactivity timer corresponding to the target cell of the conditional handover.
After the ue triggers the conditional handover, the ue may maintain two data inactivity timers, one corresponding to the source cell and one corresponding to the target cell of the conditional handover.
Therefore, on one hand, the synchronous state of the data inactivity timer on the network side can be maintained, so that the state of the network side can be determined, the state misjudgment condition caused by the asynchronous state of the data inactivity timer on the network side is reduced, and the communication efficiency is improved, on the other hand, the synchronous state of the data inactivity timer on the target cell can be maintained, and the data communication with the target cell is realized.
In some embodiments, the data communication method may further include: the first data inactivity timer is stopped in response to the first data inactivity timer expiring.
Stopping the first data inactivity timer in response to the first data inactivity timer expiring; synchronization may be achieved with a network-side data inactivity timer. After stopping the first data inactivity timer, a timeout stopped state of the first data inactivity timer may be recorded, and the user equipment may determine whether the first data inactivity timer is in the timeout stopped state by recording, and establish an RRC connection with the reselected cell or enter an idle state.
One specific example is provided below in connection with any of the embodiments described above:
the specific steps of the data communication method provided in this example, as shown in fig. 4, include:
step 401: and responding to the user equipment triggering condition switching, and continuously running a data inactivity timer configured for the source cell. The data inactivity timer is no longer restarted for data transmission and data reception by the user equipment. The data inactivity timer is stopped when the conditional switch is complete. If the data inactivity timer times out, the timer is no longer restarted.
Step 402: responding to the condition switching failure and the data inactivity timer overtime, and then the user equipment carries out RRC connection reconstruction; step 403: and responding to the condition switching failure and the data inactivity timer overtime, and then the user equipment enters an idle state.
The protocol specifies that the user equipment performs RRC connection reestablishment or enters an idle state.
The user equipment may maintain two data inactivity timers, one for the source cell and one for the target cell for the conditional handover.
In one specific example:
the source cell 1 of the UE, i.e. the serving cell, configures the data inactivity timer for the UE to be 2 seconds. The source cell 1 configuring conditional switching for the user equipment comprises:
1. the target cell 2, the handover condition is: the RSRP of the source cell 1 is lower than-98 db and the RSRP of the target cell 2 is higher than-98 db. The RRC configuration of the target cell 2 is fully configured.
2. And the target cell 3, the switching conditions are as follows: the RSRP of the target cell 3 is 3db higher than that of the source cell 1. The RRC configuration of the target cell is a generic configuration.
In response to the current state satisfying the handover condition of the target cell 2, the user equipment triggers a conditional handover, at which point the user equipment continues to run the data inactivity timer corresponding to the source cell 1.
And if the conditional switch fails and the data inactivity timer is not overtime, the user equipment performs cell selection. And if the cell selection result is the target cell 3, performing conditional switching to the target cell 3.
And the condition switching fails and the data inactivity timer is overtime, and the user equipment records overtime information.
And if the condition switching fails and the data inactivity timer is overtime, the user equipment performs RRC connection reestablishment.
In another specific example:
the source cell 1 of the UE, i.e. the serving cell, configures the data inactivity timer for the UE to be 2 seconds. The source cell 1 configuring conditional switching for the user equipment comprises:
1. the target cell 2, the handover condition is: the RSRP of the source cell 1 is lower than-98 db and the RSRP of the target cell 2 is higher than-98 db. The RRC configuration of the target cell 2 is fully configured.
2. And the target cell 3, the switching conditions are as follows: the RSRP of the target cell 3 is 3db higher than that of the source cell 1. The RRC configuration of the target cell is a generic configuration.
Responding to the current state meeting the switching condition of the target cell 3, triggering the condition switching by the user equipment, and operating two data inactivity timers, wherein one data inactivity timer corresponds to the source cell 1, namely continuously operating the data inactivity timer configured by the cell 1; the other corresponds to the target cell for conditional handover, i.e. target cell 3.
The data inactivity timer corresponding to the source cell 1 expires and the ue records the time-out information.
And if the conditional switch fails and the data inactivity timer is overtime, the user equipment performs RRC connection reestablishment.
Fig. 5 is a schematic diagram illustrating a structure of a data communication apparatus 100 according to an embodiment of the present invention; as shown in fig. 5, the apparatus 100 includes: the first timing control module 110 includes, among other things,
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 apparatus further comprises:
and the operation module 120 is configured to perform corresponding operations in response to a result of the condition switching performed by the user equipment based on the trigger condition.
In some embodiments, the condition switching performed by the ue based on the trigger condition is successful, and the apparatus 100 further includes:
a second timing control module 130 configured to stop the first data inactivity timer of the source cell corresponding to the conditional handover in response to a successful conditional handover by the user equipment based on the trigger condition.
In some embodiments, the condition switching performed by the ue based on the trigger condition fails, and the apparatus 100 further includes:
the first communication module 140 is configured to perform RRC connection re-establishment in response to failure of conditional handover by the user equipment based on the trigger condition and timeout of a first data inactivity timer of a source cell corresponding to the conditional handover.
In some embodiments, the condition switching performed by the ue based on the trigger condition fails, and the apparatus 100 further includes:
the state control module 150 is configured to enter an idle state in response to a failure of a conditional handover by the user equipment based on a trigger condition and a timeout of a first data inactivity timer of a source cell corresponding to the conditional handover.
In some embodiments, the condition switching performed by the ue based on the trigger condition fails, and the apparatus 100 further includes:
the second communication module 160 is configured to perform cell reselection 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 does not time out.
In some embodiments, the target cell for the conditional handover determined by the user equipment for cell reselection is a target cell when the user equipment performs the conditional handover based on a trigger condition; the apparatus 100 further comprises:
a third communication module 170 configured to perform handover to a target cell of the conditional handover determined by the cell reselection.
In some embodiments, the first timing control module 110 includes:
and the timing control sub-module 111 is configured to, in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with the target cell, continue to count the first data inactivity timer of the source cell corresponding to the conditional handover.
In some embodiments, the apparatus 100 further comprises:
the third timing control module 180 is configured to start timing of a second data inactivity timer of a target cell corresponding to the conditional handover in response to the user equipment triggering 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, the third timing control module 180, and the like may be implemented by one or more Central Processing Units (CPUs), Graphics Processing Units (GPUs), Baseband Processors (BPs), Application Specific Integrated Circuits (ASICs), a DSP, a Programmable Logic Device (PLD), a Complex Programmable Logic Device (CPLD), a Field-Programmable Gate Array (FPGA), a general-purpose processor, a Controller, a Microcontroller (MCU), a Microprocessor (Microprocessor), or other electronic components, for performing the foregoing methods.
Fig. 6 is a block diagram illustrating a method for a data communication device 3000 according to an example embodiment. For example, the apparatus 3000 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 6, the apparatus 3000 may include one or more of the following components: processing component 3002, memory 3004, power component 3006, multimedia component 3008, audio component 3010, input/output (I/O) interface 3012, sensor component 3014, and communications component 3016.
The processing component 3002 generally controls the overall operation 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 perform all or a portion of the steps of the methods described above. Further, the processing component 3002 may include one or more modules that facilitate interaction between the processing component 3002 and other components. For example, the processing component 3002 may include a multimedia module to facilitate interaction between the multimedia component 3008 and the processing component 3002.
The memory 3004 is configured to store various types of data to support operations at the device 3000. Examples of such data include instructions for any application or method operating on device 3000, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 3004 may be implemented by any type or combination of volatile or non-volatile memory devices 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 or optical disks.
The power supply component 3006 provides power to the various components of the device 3000. The power components 3006 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 3000.
The multimedia component 3008 includes a screen that provides an output interface between the device 3000 and a 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 an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, multimedia component 3008 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 3000 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 3010 is configured to output and/or input an audio signal. For example, the audio component 3010 may include a Microphone (MIC) configured to receive external audio signals when the apparatus 3000 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be 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.
I/O interface 3012 provides an interface between processing component 3002 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 3014 includes one or more sensors for providing status assessment of various aspects to the device 3000. For example, the sensor component 3014 can detect the open/closed status of the device 3000, the relative positioning of components, such as a display and keypad of the apparatus 3000, the sensor component 3014 can also detect a change in the position of the apparatus 3000 or a component of the apparatus 3000, the presence or absence of user contact with the apparatus 3000, orientation or acceleration/deceleration of the apparatus 3000, and a change in the temperature of the apparatus 3000. The sensor assembly 3014 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 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 assembly 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 apparatus 3000 and other devices. Device 3000 may 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 associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3016 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may 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 apparatus 3000 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 3004 comprising instructions, executable by the processor 3020 of the apparatus 3000 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the invention following, in general, the principles of the embodiments of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments of the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of embodiments of the invention being indicated by the following claims.
It is to be understood that the embodiments of the present invention are not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the invention is limited only by the appended claims.
Claims (20)
1. A data communication method, applied to user equipment, the method comprising:
in response to the user equipment triggering a conditional handover, continuing to count a first data inactivity timer of a source cell corresponding to the conditional handover.
2. The method of claim 1, further comprising:
and responding to the result of the condition switching performed by the user equipment based on the trigger condition, and performing corresponding operation.
3. The method according to claim 1 or 2, wherein the conditional handover by the user equipment based on a trigger condition is successful, the method further comprising:
stopping the first data inactivity timer of the source cell corresponding to the conditional handover in response to the conditional handover by the user equipment based on the trigger condition being successful.
4. The method according to claim 1 or 2, wherein the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
performing a radio resource control, RRC, connection reestablishment in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover times out.
5. The method according to claim 1 or 2, wherein the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
in response to the user equipment failing the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover times out, the user equipment entering an idle state.
6. The method according to claim 1 or 2, wherein the conditional handover by the user equipment based on a trigger condition fails, the method further comprising:
in response to the conditional handover also being failed by the user equipment based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover not being expired, the user equipment performs cell reselection.
7. The method of claim 6, wherein the target cell for the UE to perform the conditional handover determined by the cell reselection is a target cell for the UE to perform the conditional handover based on a trigger condition; the method further comprises the following steps:
and the user equipment carries out switching to the target cell of the conditional switching determined by the cell reselection.
8. The method of claim 1 or 2, wherein said continuing to time a first data inactivity timer corresponding to a source cell of the conditional handover in response to the user equipment triggering the conditional handover comprises:
in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with a target cell, continuing to count the first data inactivity timer of the source cell corresponding to the conditional handover.
9. The method according to claim 1 or 2, wherein the method further comprises:
and in response to the user equipment triggering the conditional handover, starting a second data inactivity timer of a target cell corresponding to the conditional handover.
10. A data communication apparatus, wherein, applied to a user equipment, the apparatus comprises: a first timing control module, wherein,
the first timing control module is configured to, in response to the user equipment triggering a conditional handover, keep timing a first data inactivity timer of a source cell corresponding to the conditional handover.
11. The apparatus of claim 10, the apparatus further comprising:
and the operation module is configured to respond to the result of the condition switching performed by the user equipment based on the trigger condition to perform corresponding operation.
12. The apparatus according to claim 10 or 11, wherein the conditional handover by the user equipment based on a trigger condition is successful, the apparatus further comprising:
a second timing control module configured to stop the first data inactivity timer of the source cell corresponding to the conditional handover in response to the conditional handover by the user equipment based on the trigger condition being successful.
13. The apparatus according to claim 10 or 11, wherein the conditional handover by the user equipment based on a trigger condition fails, the apparatus further comprising:
a first communication module configured to perform radio resource control, RRC, connection reestablishment in response to failure of the conditional handover by the user equipment based on the trigger condition and timeout of the first data inactivity timer of the source cell corresponding to the conditional handover.
14. The apparatus according to claim 10 or 11, wherein the conditional handover by the user equipment based on a trigger condition fails, the apparatus further comprising:
a state control module configured to cause the user equipment to enter an idle state in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover being expired.
15. The apparatus according to claim 10 or 11, wherein the conditional handover by the user equipment based on a trigger condition fails, the apparatus further comprising:
a second communication module configured to perform cell reselection in response to the user equipment failing to perform the conditional handover based on the trigger condition and the first data inactivity timer of the source cell corresponding to the conditional handover not being expired.
16. The apparatus of claim 15, wherein a target cell for the user equipment to perform the conditional handover determined by the cell reselection is a target cell for the user equipment to perform the conditional handover based on a trigger condition; the device further comprises:
and the third communication module is configured to perform handover to a target cell of the conditional handover determined by the cell reselection.
17. The apparatus of claim 10 or 11, wherein the first timing control module comprises:
a timing control sub-module configured to continue timing the first data inactivity timer of the source cell corresponding to the conditional handover in response to the user equipment triggering the conditional handover and the user equipment performing data transmission with a target cell.
18. The apparatus of claim 10 or 11, wherein the apparatus further comprises:
and the third timing control module is configured to respond to the user equipment triggering the conditional handover and start to time a second data inactivity timer of the target cell corresponding to the conditional handover.
19. A communication device comprising a processor, a transceiver, a memory and an executable program stored on the memory and executable by the processor, wherein the processor executes the executable program to perform the steps of the data communication method according to any one of claims 1 to 9.
20. A storage medium having stored thereon an executable program, wherein the executable program when executed by a processor implements the steps of the data communication method of any one of claims 1 to 9.
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| PCT/CN2020/074747 WO2021159277A1 (en) | 2020-02-11 | 2020-02-11 | Data communication method and apparatus, and communication device and storage medium |
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| CN111345068B (en) | 2021-12-28 |
| WO2021159277A1 (en) | 2021-08-19 |
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