CN111263412A

CN111263412A - Information transmission method, equipment and system

Info

Publication number: CN111263412A
Application number: CN201910045398.3A
Authority: CN
Inventors: 杨晓东; 鲍炜; 郑倩; 岳然
Original assignee: Vivo Software Technology Co Ltd
Current assignee: Vivo Software Technology Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-06-09

Abstract

The embodiment of the invention discloses an information transmission method, equipment and a system, relates to the technical field of communication, and can solve the problem that the time delay of the CA or DC recovery process in the prior art is large. The specific scheme is as follows: the UE performs a target action under the condition that the first cell generates RLF or HOF, wherein the target action comprises at least one of the following actions: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a main cell or a cell in a main cell group, and the target node is a node to which the second cell searched by the UE belongs. The scheme is applied to a scene of recovering a radio link when the UE generates RLF or HOF.

Description

Information transmission method, equipment and system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to an information transmission method, equipment and a system.

Background

Currently, in a Carrier Aggregation (CA) (or Dual Connectivity (DC)) scenario, when a Primary Cell (Pcell) (or Primary Cell group) has a Radio Link Failure (RLF), a User Equipment (UE) releases configuration of the Primary Cell and configuration of a secondary Cell (or configuration of the Primary Cell group and the secondary Cell group), and triggers a radio link reestablishment procedure of the UE. After the UE is successfully reestablished, if the UE needs to perform CA (or DC) again, after the node allocates relevant resources for the UE, the UE may perform CA (or DC).

However, in the CA (or DC) scenario, after the UE determines that the radio link failure occurs in the primary cell (or the primary cell group), according to the above procedure, the UE can only restore the single link by rebuilding, and can perform CA (or DC) again after the node allocates the relevant resources to the UE, so that the process of restoring the CA or DC is relatively complicated, and further, the time delay of the process of restoring the CA or DC is relatively large.

Disclosure of Invention

Embodiments of the present invention provide an information transmission method, device, and system, which can solve the problem of a long time delay in a CA or DC recovery process in the prior art.

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:

in a first aspect of the embodiments of the present invention, an information transmission method is provided, which is applied to a UE, and the method may include: the UE executes the target action when the first cell has RLF or Handover Failure (HOF). The target action includes at least one of: and sending a target measurement result of the UE to an auxiliary node of the UE, and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE. The first cell is a main cell or a cell in a main cell group, and the target node is a node to which a second cell searched by the UE belongs.

In a second aspect of the embodiments of the present invention, an information transmission method is provided, where the information transmission method is applied to an auxiliary node of a UE, and the method may include: and receiving a target measurement result sent by the UE, and sending the target measurement result to the main node. The target measurement result is sent by the UE under the condition that the first cell generates RLF or HOF, wherein the first cell is a main cell or a cell in a main cell group; the master node is a master node that serves the UE before RLF or HOF occurs.

In a third aspect of the embodiments of the present invention, an information transmission method is provided, where the information transmission method is applied to a target node, and the target node is a node to which a cell searched by a UE belongs, and the method may include: and receiving a target request message sent by the UE, and sending the target request message to the main node. The target request message is sent by the UE under the condition that the first cell generates RLF or HOF, the target request message is used for requesting to recover a wireless link of the UE, and the first cell is a main cell or a cell in a main cell group; the master node is a master node that serves the UE before RLF or HOF occurs.

In a fourth aspect of the embodiments of the present invention, an information transmission method is provided, where the information transmission method is applied to a master node, and the master node is a master node that provides a service for a UE before the UE generates an RLF or an HOF, and the method may include: receiving first information, wherein the first information is triggered and sent by the UE under the condition that the first cell generates RLF or HOF, the first information comprises at least one of a target measurement result of the UE and a target request message, the target request message is used for requesting to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

In a fifth aspect of the embodiments of the present invention, a UE is provided, where the UE includes an execution unit. And the execution unit is used for executing the target action by the UE under the condition that the RLF or the HOF occurs in the first cell. The target action includes at least one of: and sending a target measurement result of the UE to an auxiliary node of the UE, and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE. The first cell is a main cell or a cell in a main cell group, and the target node is a node to which a second cell searched by the UE belongs.

In a sixth aspect of the embodiments of the present invention, a node is provided, where the node is an auxiliary node of a UE, and the node includes a receiving unit and a sending unit. A receiving unit, configured to receive a target measurement result sent by a UE, where the target measurement result is sent by the UE when a first cell occurs RLF or HOF, and the first cell is a primary cell or a cell in a primary cell group; and the sending unit is used for sending the target measurement result received by the receiving unit to a main node, and the main node is used for providing service for the UE before the RLF or HOF occurs to the UE.

A seventh aspect of the present invention provides a node, where the node is a node to which a cell searched by a UE belongs, and the node includes a receiving unit and a transmitting unit. A receiving unit, configured to receive a target request message sent by a UE, where the target request message is sent by the UE when a first cell generates an RLF or an HOF, and the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group; and a sending unit, configured to send the target request message received by the receiving unit to a master node, where the master node is a master node that provides a service for the UE before the RLF or the HOF occurs to the UE.

In an eighth aspect of the embodiments of the present invention, a node is provided, where the node is a master node that provides a service for a UE before the UE undergoes RLF or HOF, and the node includes a receiving unit. A receiving unit, configured to receive first information, where the first information is triggered and sent by the UE when the first cell has an RLF or an HOF, and the first information includes at least one of a target measurement result of the UE and a target request message, where the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

In a ninth aspect of the embodiments of the present invention, there is provided a UE, where the UE includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and the computer program, when executed by the processor, implements the steps of the information transmission method in the first aspect.

In a tenth aspect of the embodiments of the present invention, a node is provided, where the node is an auxiliary node of a UE, and the node includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when executed by the processor, the computer program implements the steps of the information transmission method in the second aspect.

In an eleventh aspect of the embodiments of the present invention, there is provided a node, where the node is a node to which a cell searched by a UE belongs, and the node includes a processor, a memory, and a computer program stored in the memory and capable of being executed on the processor, where the computer program, when executed by the processor, implements the steps of the information transmission method in the third aspect.

A twelfth aspect of the embodiments of the present invention provides a node, where the node is a master node that provides a service for a UE before the UE undergoes RLF or HOF, and the node includes a processor, a memory, and a computer program that is stored in the memory and is executable on the processor, and when the computer program is executed by the processor, the steps of the information transmission method in the fourth aspect are implemented.

A thirteenth aspect of embodiments of the present invention provides a communication system, which includes the UE as in the fifth aspect, the node as in the sixth aspect, the node as in the seventh aspect, and the node as in the eighth aspect.

Alternatively, the communication system comprises a UE as in the ninth aspect above, a node as in the tenth aspect above, a node as in the eleventh aspect above, and a node as in the twelfth aspect above.

Wherein the node in the sixth aspect and the node in the tenth aspect are secondary nodes of the UE, the node in the seventh aspect and the node in the eleventh aspect are nodes to which a cell searched by the UE belongs, and the node in the eighth aspect and the node in the twelfth aspect are primary nodes serving the UE before RLF or HOF occurs in the UE.

A fourteenth aspect of embodiments of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the information transmission method in the first, second, third or fourth aspects.

In the embodiment of the present invention, the UE may perform a target action in case of the first cell having RLF or HOF, where the target action includes at least one of the following: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs. That is, when the UE determines that the RLF or the HOF occurs in the first cell, the UE may notify the secondary node of the UE or the target node that the UE generates the RLF or the HOF in the first cell by executing the target action, so that the secondary node of the UE or the target node may send information notified by the UE to the master node of the UE, and further, the master node of the UE may determine that the RLF or the HOF occurs in the first cell, so as to instruct the UE to perform cell handover. Thus, the process of recovering the CA or the DC by the UE can be simplified, and the time delay of recovering the CA or the DC by the UE is reduced.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 3 is a second schematic flow chart of an information transmission method according to an embodiment of the present invention;

fig. 4 is a third schematic flow chart of an information transmission method according to an embodiment of the present invention;

fig. 5(a) is a fourth schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 5(b) is a fifth flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 6(a) is a sixth schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 6(b) is a seventh schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 7 is an eighth schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 8 is a ninth flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 9 is a tenth of a flow chart of an information transmission method according to an embodiment of the present invention;

fig. 10 is an eleventh flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 11 is a twelfth schematic flow chart illustrating an information transmission method according to an embodiment of the present invention;

fig. 12 is a thirteenth schematic flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 13 is a fourteenth flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 14 is a fifteen-step flow chart of an information transmission method according to an embodiment of the present invention;

fig. 15 is a sixteenth schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 16 is a seventeenth schematic flow chart illustrating an information transmission method according to an embodiment of the present invention;

fig. 17 is an eighteenth flowchart of an information transmission method according to an embodiment of the present invention;

fig. 18 is a nineteenth schematic flowchart of an information transmission method according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 20 is a second schematic structural diagram of a UE according to the embodiment of the present invention;

fig. 21 is a third schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 22 is a fourth schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 23 is a schematic structural diagram of a node according to an embodiment of the present invention;

fig. 24 is a second schematic structural diagram of a node according to the second embodiment of the present invention;

fig. 25 is a third schematic structural diagram of a node according to an embodiment of the present invention;

fig. 26 is a fourth schematic structural diagram of a node according to an embodiment of the present invention;

fig. 27 is a hardware diagram of a UE according to an embodiment of the present invention;

fig. 28 is a hardware schematic diagram of a node according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first" and "second," and the like, in the description and in the claims of embodiments of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, a first numerical value and a second numerical value, etc., are used to distinguish between the different numerical values and are not used to describe a particular order of the numerical values.

In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of elements refers to two elements or more.

The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, which may mean: there are three cases of a display panel alone, a display panel and a backlight at the same time, and a backlight alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, input/output denotes input or output.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The embodiment of the invention provides an information transmission method, wherein UE (user equipment) can execute target actions under the condition that RLF (radio link failure) or HOF (hot over-the-air) occurs in a first cell, and the target actions comprise at least one of the following actions: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs. That is, when the UE determines that the RLF or the HOF occurs in the first cell, the UE may notify the secondary node of the UE or the target node that the UE generates the RLF or the HOF in the first cell by executing the target action, so that the secondary node of the UE or the target node may send information notified by the UE to the master node of the UE, and further, the master node of the UE may determine that the RLF or the HOF occurs in the first cell, so as to instruct the UE to perform cell handover. Thus, the process of recovering the CA or the DC by the UE can be simplified, and the time delay of recovering the CA or the DC by the UE is reduced.

The technical scheme provided by the invention can be applied to various communication systems, such as a 5G communication system, a future evolution system, or a plurality of communication convergence systems and the like. A variety of application scenarios may be included, for example, scenarios such as Machine to Machine (M2M), D2M, macro and micro Communication, enhanced Mobile Broadband (eMBB), ultra high reliability and ultra Low Latency Communication (urrllc), and mass internet of things Communication (mtc). These scenarios include, but are not limited to: communication between the UE and the UE, communication between nodes, or communication between nodes and the UE. The embodiment of the invention can be applied to the communication between the node and the UE in the 5G communication system, or the communication between the UE and the UE, or the communication between the node and the node.

Fig. 1 shows a schematic diagram of a possible structure of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system includes at least one node 100 (only one is illustrated in fig. 1) and one or more UEs 200 (only one is illustrated in fig. 1) to which each node 100 is connected.

The at least one node 100 may serve a Cell Group (e.g., Master Cell Group (MCG); or Secondary Cell Group (SCG)), where a Cell Group includes at least one Primary Cell (e.g., Primary Cell in the Master Cell Group or Primary Secondary Cell in the Secondary Cell Group (PSCell)), and may further include at least one Secondary Cell (e.g., Secondary Cell in the Master Cell Group or Secondary Cell in the Secondary Cell Group (SCell)).

For example, the communication system shown in fig. 1 may be a multi-carrier communication system, for example, a carrier aggregation scenario, a dual connectivity scenario, and the like, which is not limited in this embodiment of the present invention.

The node 100 may be a base station, a core network device, a Transmission and reception node (TRP), a relay station, an access Point, or the like. The node 100 may be a Base Transceiver Station (BTS) in a global system for Mobile communications (GSM) or Code Division Multiple Access (CDMA) network, or may be an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or may be an eNB or enodeb (evolved nodeb) in LTE. The node 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The node 100 may also be a node in a 5G communication system or a node in a future evolution network. The words used are not to be construed as limitations of the invention.

The UE200 may be a wireless UE, which may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device, computing device, or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a UE in a future 5G network or a UE in a future evolved PLMN network, etc., as well as a wired UE. A Wireless UE may communicate with one or more core networks via a Radio Access Network (RAN), and may be a Mobile UE such as a Mobile telephone (or "cellular" telephone) and a computer with a Mobile UE, such as a portable, pocket, hand-held, computer-included, or vehicle-mounted Mobile device that exchanges languages and/or data with the RAN, as well as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like, or a Mobile device, a User Equipment (User Equipment, UE), a UE, an Access UE, a Wireless communication device, a UE unit, a UE Station, a Mobile Station (Mobile Station), or a Mobile Station (Mobile Station), Remote Station (Remote Station), Remote Station, Remote UE (Remote terminal), Subscriber Unit (Subscriber Unit), Subscriber Station (Subscriber Station), User Agent (User Agent), UE device, etc. As an example, in the embodiment of the present invention, fig. 1 illustrates that the UE is a mobile phone.

Based on the communication system as shown in fig. 1, the embodiment of the present invention can be applied to, but not limited to: in a CA scenario, when the UE generates RLF or HOF in a primary cell, the UE may send a target measurement result to a primary node (a node serving the primary cell) through a secondary cell (a secondary node), and/or the UE may send a target request message to the primary node through a second cell (cell search) searched, so that the primary node receives the target measurement result, and/or after the target request message, the primary node sends a handover command to the UE through the secondary cell, the second cell, or another cell, and the UE executes the handover command after receiving the handover command, thereby recovering a radio link of the UE (recovering CA); in a DC scenario, when the UE generates RLF or HOF in a cell in the master cell group (also referred to as RLF or HOF generated by MCG), the UE may send a target measurement result to the master node (a node serving a cell in the master cell group) through a cell in the secondary cell group (a secondary node), and/or the UE may send a target request message to the master node through a second cell searched by (cell search), so that the master node receives the target measurement result, and/or after the target request message, the master node sends a handover command to the UE through the cell in the secondary cell group or the second cell or other cells, and the UE executes the handover command after receiving the handover command, and then recovers a radio link of the UE (recovers DC).

An information transmission method, device, and system provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides an information transmission method applied to a user equipment UE, and as shown in fig. 2, the information transmission method may include the following step 101.

Step 101, in case that the UE generates RLF or HOF in the first cell, the UE performs a target action, where the target action includes at least one of: and sending the target measurement result of the UE to the auxiliary node and sending a target request message to the target node.

The target request message is used for requesting to recover a wireless link of the UE, where the first cell is a primary cell or a cell in a primary cell group, the secondary node is a secondary node of the UE, and the target node is a node to which a second cell searched by the UE belongs.

Optionally, in the embodiment of the present invention, determining that a radio link failure (i.e., RLF) occurs in the cell by the UE may include at least one of the following three cases:

in the first case, in a Long Term Evolution (LTE) system or a new air interface (NR) system of a fifth generation mobile communication (5G), a UE has a Radio Link Monitor (RLM) function. Taking the RLM function in the LTE system as an example, the UE monitors the radio link by measuring a Signal-to-noise and interference plus noise ratio (SINR) of a Cell Reference Signal (CRS) of a Physical Downlink Control Channel (PDCCH). When the measured CRS reference signal of the PDCCH part is lower than a target threshold value, the wireless link is determined to be out-of-synchronization (out-of-sync), the physical layer of the UE informs the UE of an out-of-sync indication at a higher layer (RRC layer), and if the RRC layer continuously receives N out-of-sync indications, the UE starts a Timer (Timer) T310. If the timer T310 runs overtime, the UE judges that RLF occurs in the corresponding cell.

In the second case, the UE determines that RLF occurs when the RLC layer data transmission of the UE reaches the maximum number of times.

In the third case, when a Random Access Channel (RACH) reaches a maximum number of times, the UE determines that RLF occurs.

Optionally, in the embodiment of the present invention, when the UE executes the handover command, if the timer T304 times out, the UE determines that a handover failure (i.e. an HOF) occurs in the cell to be handed over to. At this time, the first cell specifically includes: when the UE executes the handover command, the UE determines that the HOF occurs.

Optionally, the step 101 may specifically include at least one of the following steps: step 101a and step 101 b.

Step 101a, when the UE generates RLF or HOF in the first cell, the UE sends a target measurement result of the UE to the secondary node.

For example, in a CA scenario, the first cell is a primary cell, the first cell is a cell served by the primary node, and the secondary node is a node serving any one of the secondary cells. That is, when it is determined that the RLF or the HOF occurs in the primary cell, the UE sends the target measurement result of the UE to the secondary node through the secondary cell. Optionally, the UE may send a target measurement result of the UE to the secondary node through the secondary cell on a Physical Uplink Control Channel (PUCCH); the UE may also send the target measurement result of the UE to the secondary node through the secondary cell on other uplink channels.

For example, in a DC scenario, the first cell is a cell in a master cell group, and may be, for example, a master cell or any one of secondary cells in the master cell group, the first cell is a cell served by a master node, and the master node may be one or more nodes serving the master cell group; a secondary node is one or more nodes that serve a secondary cell group. That is, when the UE determines that the cell of the UE in the primary cell group has RLF or HOF, the UE sends the target measurement result of the UE to the secondary node through any cell in the secondary cell group.

Further, after receiving the target measurement result sent by the UE, the secondary node sends the target measurement result to the primary node.

Step 101b, under the condition that the UE generates RLF or HOF in the first cell, the UE sends a target request message to a target node.

The target node is a node to which the second cell searched by the UE belongs. Optionally, the target node may be a master node, the target node may also be a slave node, and the target node may also be any node except for the master node and the slave node.

For example, when the target node is a master node, the second cell is a master cell in a CA scenario, or the second cell is a cell (a master cell or a secondary cell) in a master cell group in a DC scenario, then the second cell may be the same cell as the first cell, and if the second cell is the same cell as the first cell, when the UE searches for a cell, the signal quality of the first cell is better, and the UE searches for the first cell.

Illustratively, when the target node is a secondary node, the second cell is a secondary cell in a CA scenario, or the second cell is a cell (primary secondary cell or secondary cell) in a secondary cell group in a DC scenario, or the second cell is a cell other than the cells in the secondary cell group served by the secondary node (i.e., the second cell is served by the secondary node but does not belong to the secondary cell group). Further, after the target node receives the target measurement result sent by the UE, the target node sends the target measurement result to the master node.

Illustratively, when the target node is any node other than the primary node and the secondary node, the second cell may be any cell around the UE. Further, after the target node receives the target measurement result sent by the UE, the target node sends the target measurement result to the master node. Alternatively, the target node may need to interact with the host node through signaling to establish a connection.

Optionally, the target request message includes third indication information, where the third indication information is used to indicate that the UE generates RLF or HOF in the first cell. Therefore, the target node can determine that the UE generates RLF or HOF in the first cell more clearly, the process of recovering CA or DC by the UE can be further simplified, and the time delay is reduced.

Optionally, the target request message may not include the third indication information, which may be determined according to actual usage requirements, and the embodiment of the present invention is not limited.

Optionally, the target request message is a Radio Resource Control (RRC) Connection reestablishment request message (RRC Connection Re-establishment procedure), an RLF recovery request message, or an HOF recovery request message. Therefore, the mode of the target request message is diversified, the mode of sending the target request message to the target node by the UE can be increased, the process of recovering the CA or the DC by the UE can be further simplified, and the time delay is reduced.

For example, the UE sends an RRC connection reestablishment request message to the target node when the UE generates an RLF or an HOF in the first cell, where the RRC connection reestablishment request message may be the same as an RRC connection reestablishment request message in the prior art, or a field of the third indication information may be added in the RRC connection reestablishment request message in the prior art, which is specifically determined according to actual usage requirements, and the embodiment of the present invention is not limited.

Illustratively, the UE sends an RLF recovery request message to the target node in case the UE experiences RLF in the first cell. The RLF recovery request message may be a defined new message, where the RLF recovery request message may include the third indication message for indicating that the UE generates RLF in the first cell, or the RLF recovery request message may not include the third indication message for indicating that the UE generates RLF in the first cell, which is specifically determined according to actual usage requirements, and embodiments of the present invention are not limited thereto.

For example, the UE sends an HOF recovery request message to the target node when the UE generates the HOF in the first cell, where the HOF recovery request message may include the third indication message for indicating that the UE generates the RLF in the first cell, and the HOF recovery request message may not include the third indication message for indicating that the UE generates the RLF in the first cell.

Optionally, before performing the step 101a, the information transmission method provided in the embodiment of the present invention may further include the following step 101 c.

Step 101c, the UE performs measurement according to the target measurement configuration information stored in the UE to obtain the target measurement result.

Specifically, the UE performs measurement according to target measurement configuration information configured for the UE by the node before the RLF or the HOF occurs, so as to obtain the target measurement result.

The node configures target measurement configuration information for the UE, and the UE obtains a corresponding target measurement result through measurement. Optionally, the target measurement configuration information may include at least one of the following: the present invention may specifically refer to the related art, and the embodiments of the present invention are not limited thereto, such as measurement configuration information for measuring the Received Power (RSRP) of the downlink Reference Signal, measurement configuration information for measuring the total Received Power (RSSI) of the UE (including useful signals, interference, and background noise), and measurement configuration information for measuring the Received quality (RSRQ) of the downlink specific cell Reference Signal.

Therefore, the UE carries out measurement according to the target measurement configuration information stored in the UE to obtain the target measurement result, compared with the prior art, the process of recovering the CA or the DC by the UE can be further simplified, and the time delay is reduced.

Optionally, the target measurement configuration information is any one of the following: the measurement configuration information configured by the master node for the UE and the measurement configuration information configured by the master node for the UE through a first Signaling Radio Bearer (SRB) of the master node are the master node that provides service for the UE before the RLF or the HOF occurs to the UE. The mode of configuring the target measurement configuration information is diversified, the process of recovering the CA or the DC by the UE can be further simplified, and the time delay is reduced.

Illustratively, the first SRB may be SRB1 or SRB 2.

Optionally, the step 101a may specifically be: and sending the target measurement result to the secondary node on a target SRB, wherein the target SRB is a separation SRB or a second SRB, the separation SRB is a part of the first SRB, and the second SRB is the SRB of the secondary node. Thus, the mode of sending the target measurement result is diversified, the process of UE recovering CA or DC can be further simplified, and the time delay is reduced.

Illustratively, the split SRB may be at least one of: portions of SRB1 and portions of SRB 2. The second SRB may be SRB 3.

Optionally, before the step 101b is executed, the information transmission method provided in the embodiment of the present invention may further include the following step 101 d.

Step 101d, the UE searches for a cell, and determines a cell with the searched signal quality greater than or equal to the first threshold as the second cell.

For the specific UE to search the cell and determine the second cell according to the search result, reference may be made to the related art, which is not described herein again.

Therefore, the UE searches the cell and determines the cell with the searched signal quality greater than or equal to the first threshold as the second cell, compared with the prior art, the process of recovering CA or DC by the UE can be further simplified, and the time delay is reduced.

Optionally, with reference to fig. 2, as shown in fig. 3, after step 101, the information transmission method provided in the embodiment of the present invention may further include steps 102 to 103 described below.

Step 102, the UE receives a target switching command.

The target handover command is used to instruct the UE to handover from the first cell to a target cell.

Optionally, the step 102 may specifically include any one of the following steps 102a, 102b, and 102 c.

102a, the UE receives a target handover command sent by the secondary node.

For example, the primary node receives a target measurement result sent by a secondary node (a first secondary node), where the target measurement result carries the UE identity, and the primary node, in combination with a context (context) stored in the primary node, may know that the UE is a device in a CA or DC scenario, so that it may be determined that the UE generates an RLF or an HOF in a first cell (in a message carrying the target measurement result, the primary node may also carry the third indication information, and according to the third indication information, the primary node may also determine that the UE generates an RLF or an HOF in the first cell), and then determine a target cell according to the target measurement result, and send a target handover command to the UE through the secondary node (a second secondary node). And the UE receives the switching command sent by the main node through the auxiliary node.

It should be noted that: the first auxiliary node and the second auxiliary node may be the same auxiliary node, or may not be the same auxiliary node, and the embodiment of the present invention is not limited.

And 102b, the UE receives a target switching command sent by the target node.

For example, the primary node receives a target request message sent by a target node (the target node is not a primary node), determines that the UE generates RLF or HOF in the first cell according to the target request message (the primary node may also determine that the UE generates RLF or HOF in the first cell according to the third indication information), and then determines the second cell as the target cell by the primary node, or the primary node re-determines a cell different from the second cell as the target cell (the specific method for determining the target cell is not limited in the embodiments of the present invention), and sends a target handover command to the UE through the first node (the target secondary node or the target node). And the UE receives a switching command sent by the main node through the first node.

It should be noted that: the target secondary node is a different secondary node than the target node.

And 102c, the UE receives a target switching command sent by the main node.

For example, a master node (a master node is a target node) receives a target request message sent by the UE, determines that the RLF or the HOF occurs in the first cell by the UE according to the target request message (the master node may also determine that the RLF or the HOF occurs in the first cell by the UE according to the third indication information), and then determines the second cell as the target cell by the master node, or the master node re-determines a cell different from the second cell as the target cell (a specific method for determining the target cell is not limited in the embodiments of the present invention), and sends a target handover command to the UE. And the UE receives a switching command sent by the main node.

Step 103, according to the target switching instruction, the UE performs switching from the first cell to the target cell.

The specific process of step 103 may refer to the related art, and is not described herein.

Therefore, the UE receives the target switching instruction and performs switching from the first cell to the target cell according to the target switching instruction, and after the switching is completed, the UE realizes the rapid recovery of the CA or DC process.

Optionally, with reference to fig. 3, as shown in fig. 4, before step 103, the information transmission method provided in the embodiment of the present invention may further include step 104 described below.

Step 104, the UE executes a random access procedure in the target cell.

In case that whether the random access procedure is performed in the target cell is not indicated in the target handover command, the UE must perform the random access procedure in the target cell. Therefore, the recovery of the CA or the DC of the UE can be further realized, compared with the prior art, the process of recovering the CA or the DC by the UE can be further simplified, and the time delay is reduced.

Optionally, the target handover command includes first indication information, where the first indication information is used to indicate whether the UE executes a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure.

Illustratively, at present, the random access procedure may include a contention-based random access procedure and a non-contention-based random access procedure. The contention-based random access procedure may include the following four steps: step one, UE sends a random access preamble sequence (random access preamble) to a node; step two, the node sends a Random Access Response (Random Access Response) to the UE; step three, the UE sends scheduling transmission (scheduled transmission) to the node; step four, the node sends Contention Resolution (Contention Resolution) to the UE. The non-contention based random access procedure may include the following two steps: step one, UE sends a random access preamble sequence (random access preamble) to a node; and step two, the node sends a Random Access Response (Random Access Response) to the UE.

If the partial process of the random access process is the partial process of the contention-based random access process, the method includes a partial step of the four steps of the contention-based random access process, and specifically includes at least one step of the four steps of the contention-based random access process, and at most three steps. If the partial procedure of the random access procedure is a partial procedure of the non-contention based random access procedure, the method includes a partial step of the two steps of the non-contention based random access procedure, and specifically includes any one of the two steps of the non-contention based random access procedure.

Further alternatively, with reference to fig. 3, as shown in fig. 5(a), the step 103 may be specifically implemented by the following step 103 a; alternatively, as shown in fig. 5(b) in conjunction with fig. 3, the step 103 may be specifically realized by the step 103b described below.

And 103a, under the condition that the first indication information indicates that the UE does not execute the target process in the target cell, the UE executes the switching from the first cell to the target cell.

For example, if the master node determines the target handover command according to the target request message, since the UE needs to perform the random access procedure first to send the target request message, the master node may determine that the UE has performed the random access procedure on the target cell when receiving the target request message, and the target handover command may include first indication information for indicating that the UE does not perform the target procedure in the target cell.

And 103b, under the condition that the first indication information indicates that the UE executes the target process in the target cell, after the target process is executed in the target cell, the UE executes the switching from the first cell to the target cell.

For example, if the primary node determines the target handover command according to the target measurement result, the target handover command may include first indication information for indicating the UE to perform the target procedure in the target cell.

Therefore, the UE can determine whether to execute the target process on the target cell according to the first indication information, so that the recovery of the UE CA or the DC can be further realized when the first indication information indicates that the target process is executed on the target cell, and when the first indication information indicates that the target process is not required to be executed on the target cell, the process of recovering the CA or the DC by the UE can be further simplified, and the time delay is reduced. In conclusion, compared with the prior art, the process of recovering CA or DC by the UE can be further simplified, and the time delay is reduced.

Optionally, the target handover instruction includes second indication information, where the second indication information is used to indicate that the UE determines whether to execute a target procedure in the target cell according to the target information, where the target information is used to indicate whether the UE has executed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure; with reference to fig. 3, as shown in fig. 6(a), before step 103, the information transmission method provided in the embodiment of the present invention may further include step 105 described below, and step 103 may also be implemented by step 103c described below; or in conjunction with fig. 3, as shown in fig. 6(b), before step 103, the information transmission method provided in the embodiment of the present invention may further include step 105 described below, and step 103 may also be implemented by step 103d described below.

Step 105, according to the target information, the UE determines whether the UE has executed the target procedure in the target cell.

If the target information indicates that the UE has performed the target procedure in the target cell, the UE determines that the UE has performed the target procedure in the target cell; if the target information indicates that the UE does not perform the target procedure in the target cell, the UE determines that the UE does not perform the target procedure in the target cell.

Step 103c, the UE performs handover from the first cell to the target cell, in case the UE has performed the target procedure in the target cell.

In case the UE has performed the target procedure in the target cell, the UE need not perform the target procedure in the target cell any more.

Step 103d, in case the UE does not execute the target procedure in the target cell, performing handover from the first cell to the target cell after executing the target procedure in the target cell.

In case the UE does not perform the target procedure in the target cell, the UE needs to perform the target procedure in the target cell.

For example, before the UE sends the target request message through the target node, a random access procedure needs to be performed on the second cell. If the UE has RLF or HOF in the first cell, the UE sends the target measurement result through the secondary node and also sends the target request message through the target node; if the master node receives the target measurement result first and determines the second cell as the target cell for handover, the master node cannot determine whether the UE has executed the target process in the target cell (the second cell), and therefore, the handover command sent by the master node to the UE carries the second indication information, that is, the master node gives the UE the decision of whether the UE needs to execute the target process in the target cell. If the master node receives the target request message first and determines the second cell as the target cell for handover, the master node may determine that the UE has executed the target process in the target cell (the second cell), and therefore, the handover command sent by the master node to the UE carries the first indication information.

Thus, under the condition that the main node cannot determine whether the UE executes the target process in the target cell, the UE can determine whether the UE executes the target process in the target cell according to the target information, and further determine whether the UE needs to execute the target process in the target cell, so that the process of recovering CA or DC by the UE can be further simplified, and the time delay is reduced.

In the embodiment of the present invention, the UE may perform a target action when the first cell generates the RLF or the HOF, where the target action includes at least one of the following: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs. That is, when the UE determines that the RLF or the HOF occurs in the first cell, the UE may notify the secondary node of the UE or the target node that the UE generates the RLF or the HOF in the first cell by executing the target action, so that the secondary node of the UE or the target node may send information notified by the UE to the master node of the UE, and further, the master node of the UE may determine that the RLF or the HOF occurs in the first cell, so as to instruct the UE to perform cell handover. Thus, the process of recovering the CA or the DC by the UE can be simplified, and the time delay of recovering the CA or the DC by the UE is reduced.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides an information transmission method applied to a secondary node of a UE, and as shown in fig. 7, the information transmission method may include steps 201 to 202 described below.

Step 201, the secondary node receives the target measurement result sent by the UE.

The target measurement result is sent by the UE when the first cell is RLF or HOF, and the first cell is a primary cell or a cell in a primary cell group.

Step 202, the secondary node sends the target measurement result to the primary node.

The primary node is the primary node that serves the UE before RLF or HOF occurs for the UE.

For the detailed description of step 201 to step 202, reference may be made to the related description in the above embodiments, and details are not repeated here.

Optionally, the step 201 may be specifically implemented by a step 201a described below.

Step 201a, on the target SRB, the secondary node receives the target measurement result sent by the UE.

The target SRB is a detached SRB or a second SRB, the detached SRB is part of a first SRB, the first SRB is the SRB of the primary node, and the second SRB is the SRB of the secondary node.

Reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

Optionally, with reference to fig. 7, as shown in fig. 8, after step 202, the information transmission method provided in the embodiment of the present invention may further include steps 203 to 204 described below.

And step 203, the auxiliary node receives the switching command sent by the main node.

And step 204, the auxiliary node sends the target switching command to the UE.

For the detailed description of steps 203 to 204, reference may be made to the related description in the above embodiments, and details are not repeated here.

In the embodiment of the present invention, the secondary node may receive a target measurement result sent by the UE, where the target measurement result is sent by the UE when the first cell has RLF or HOF, and the first cell is a primary cell or a cell in a primary cell group; and transmitting the target measurement result to a master node, the master node serving the UE before the RLF or the HOF occurs to the UE. Namely, the auxiliary node forwards the target measurement result received from the UE to the main node to inform the main node that the UE generates RLF or HOF in the first cell, so that the process of recovering CA or DC by the UE can be simplified, and the time delay is reduced.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides an information transmission method applied to a target node, where the target node is a node to which a cell searched by a user equipment UE belongs, and as shown in fig. 9, the information transmission method may include the following step 301.

Step 301, the target node receives a target request message sent by the UE.

The target request message is sent by the UE when the first cell has RLF or HOF, and the target request message is used to request to recover the radio link of the UE, where the first cell is a primary cell or a cell in a primary cell group.

For the specific description of step 301, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

Optionally, if the target node is not a master node, referring to fig. 9, as shown in fig. 10, after step 301, the information transmission method provided in the embodiment of the present invention may further include step 302 described below.

Step 302, the target node sends the target request message to the master node.

For the detailed description of step 302, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

Optionally, the target request message includes indication information, where the indication information is used to indicate that the UE generates RLF or HOF in the first cell.

For specific description of the indication information, reference may be made to the description related to the third indication information in the foregoing embodiment, which is not described herein again.

Optionally, the target request message is a radio resource control RRC connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message. For specific details, reference may be made to the description related to the target request message in the foregoing embodiment, and details are not described here again.

Optionally, referring to fig. 10, as shown in fig. 11, after step 302, the information transmission method provided in the embodiment of the present invention may further include steps 303 to 304 described below.

Step 303, the target node receives the handover command sent by the master node.

Step 304, the target node sends the target handover command to the UE.

For the detailed description of steps 303 to 304, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

Optionally, when the target node is the primary node, the target node determines that the UE generates the RLF or the HOF in the first cell according to the target request message (the target node may also determine that the RLF or the HOF occurs in the first cell according to the third indication information), and the target node determines the second cell as the target cell, or the target node re-determines a cell different from the second cell as the target cell (the specific method for determining the target cell is not limited in the embodiment of the present invention). Referring to fig. 9, as shown in fig. 12, after step 301, the information transmission method provided in the embodiment of the present invention may further include step 305 described below.

Step 305, the target node sends a target handover command to the UE.

And the UE receives the switching command sent by the target node and executes the target switching command.

For the detailed description of step 305, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

In the embodiment of the invention, a target node receives a target request message sent by the UE, wherein the target request message is sent by the UE under the condition that a first cell generates RLF or HOF, the target request message is used for requesting to recover a wireless link of the UE, and the first cell is a main cell or a cell in a main cell group; and transmitting the target request message to a master node, the master node being a master node that serves the UE before the RLF or HOF occurs. Namely, the target node forwards the target request message received from the UE to the main node to inform the main node that the UE generates RLF or HOF in the first cell, thereby simplifying the process of recovering CA or DC by the UE and reducing time delay.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides an information transmission method applied to a master node, where the master node is a master node that serves a user equipment UE before the RLF or the HOF occurs to the UE, and as shown in fig. 13, the information transmission method may include steps 401 to 402 described below.

Step 401, the master node receives the first information.

The first information is triggered and sent by the UE when the first cell has RLF or HOF, and the first information includes at least one of a target measurement result of the UE and a target request message, where the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

Optionally, the step 401 may specifically include a step 401a, a step 401b, a step 401c, a step 401a and a step 401b, or a step 401a and a step 401 c.

Step 401a, the primary node receives the target measurement result sent by the secondary node.

Step 401b, the master node receives a target request message sent by the target node.

Step 401c, the master node receives a target request message sent by the UE.

It should be noted that: in case the target node is a master node, step 401 comprises step 401c described above. Step 401c corresponds to step 301 described above.

Optionally, with reference to fig. 13, as shown in fig. 14, after step 401, the information transmission method provided in the embodiment of the present invention may further include step 402 described below.

Step 402, the master node sends a target switch command.

Optionally, the step 402 may specifically include any one of the following steps 402a, 402b, and 402 c.

Step 402a, the primary node sends a target switching command to the secondary node.

Step 402b, the master node sends a target switching command to the target node.

Step 402c, the master node sends a target handover command to the UE.

It should be noted that: in the case where the target node is the master node, step 402 includes step 402c described above. Step 402c corresponds to step 305 described above.

It should be noted that: when step 401 includes step 401a described above, step 402 includes step 402a described above; when step 401 includes step 401b described above, step 402 includes step 402b described above; when step 401 includes step 401c described above, step 402 includes step 402c described above; when the step 401 includes the above step 401a and step 401b, the step 402 includes the above step 402a or step 402 b; when step 401 includes step 401a and step 401c described above, step 402 includes step 402a or step 402c described above.

Optionally, when the step 401 includes the step 401a and the step 401b, and the step 402 includes the step 402a or the step 402b, the master node may determine whether to execute the step 402a or the step 402b according to a time sequence of executing the step 401a and the step 401 b. For example, if the master node first performs step 401a, then step 402a is performed; executing step 401b first, then executing step 402 b; the master node performs both step 401a and step 401b, and may perform either of step 402a and step 402 b.

Optionally, when the step 401 includes the step 401a and the step 401c, and the step 402 includes the step 402a or the step 402c, the master node may determine whether to execute the step 402a or the step 402c according to a time sequence of executing the step 401a and the step 401 c. For example, if the master node first performs step 401a, then step 402a is performed; executing step 401c first, then executing step 402 c; the master node performs both step 401a and step 401c, and may perform either of step 402a and step 402 c.

For specific description, reference may be made to the related description in the foregoing embodiments, which are not repeated herein.

Optionally, the target handover instruction includes second indication information, where the second indication information is used to indicate that the UE determines whether to execute a target procedure in the target cell according to the target information, and the target information is used to indicate whether the UE has executed the target procedure in the target cell, where the target procedure is a random access procedure or a partial procedure of the random access procedure.

Optionally, the target request message includes third indication information, where the third indication information is used to indicate that the UE generates RLF or HOF in the first cell.

Optionally, the target request message is a radio resource control RRC connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

In the embodiment of the present invention, a primary node receives first information, where the first information is triggered and sent by the UE when a first cell has an RLF or an HOF, where the first information includes at least one of a target measurement result of the UE and a target request message, the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group. Namely, the main node receives the first information and determines that the UE generates RLF or HOF in the first cell from the first information, thereby simplifying the process of recovering CA or DC by the UE and reducing time delay.

With reference to the foregoing embodiments, four possible specific implementation processes of the information transmission method provided in the embodiments of the present invention are exemplarily described.

As shown in fig. 15, a first possible specific process is:

And step 204, the auxiliary node sends the target switching command to the UE.

102a, the UE receives a target handover command sent by the secondary node.

For specific description of each step, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.

As shown in fig. 16, the target node is not a master node, and a second possible specific process is:

Step 301, the target node receives a target request message sent by the UE.

Step 302, the target node sends the target request message to the master node.

Step 402b, the master node sends a target switching command to the target node.

Step 304, the target node sends the target handover command to the UE.

And 102b, the UE receives a target switching command sent by the target node.

As shown in fig. 17, the target node is a master node, and the third possible specific process is:

Step 301, the target node receives a target request message sent by the UE.

Step 305, the target node sends a target handover command to the UE.

And 102b, the UE receives a target switching command sent by the target node.

As shown in fig. 18, the target node is not a master node, and a third possible specific process is:

Step 301, the target node receives a target request message sent by the UE.

Step 302, the target node sends the target request message to the master node.

Step 401, the master node receives the first information.

Step 402, the master node sends a target switch command.

Step 102, the UE receives a target switching command.

It should be noted that: the embodiment of the present invention does not limit the execution sequence between the above step a (including step 101a, step 201, and step 202) and the above step B (including step 101B, step 301, and step 302). For example, step a may be performed first, and then step B may be performed; or the step B can be executed firstly, and then the step A can be executed; step a and step B may also be performed simultaneously.

As shown in fig. 19, an embodiment of the present invention provides a UE 500, where the UE 500 includes an execution unit 501. An executing unit 501, configured to execute the target action when the first cell generates the RLF or the HOF. The target action includes at least one of: and sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE. The first cell is a main cell or a cell in a main cell group, and the target node is a node to which a second cell searched by the UE belongs.

Optionally, in this embodiment of the present invention, when the target action includes sending a target measurement result of the UE to the secondary node, as shown in fig. 20 in combination with fig. 19, the UE 500 may further include a measurement unit 502. A measurement unit 502, configured to perform measurement according to target measurement configuration information stored in the UE before the execution unit 501 executes the target action, so as to obtain a target measurement result.

Optionally, in this embodiment of the present invention, the target measurement configuration information may be any one of the following items: the main node is used for configuring measurement configuration information for the UE and measurement configuration information for the UE through a first SRB of the main node, and the main node is used for providing service for the UE before RLF or HOF occurs to the UE.

Optionally, in this embodiment of the present invention, the executing unit 501 is specifically configured to send the target measurement result obtained by the measurement performed by the measuring unit 502 to the auxiliary node on a target SRB, where the target SRB is a separation SRB or a second SRB, the separation SRB is a part of the first SRB, and the second SRB is an SRB of the auxiliary node.

Optionally, in this embodiment of the present invention, when the target action includes sending a target request message to a target node, as shown in fig. 21 in conjunction with fig. 19, the UE 500 may further include a searching unit 503. A searching unit 503, configured to search for a cell before the performing unit 501 performs the target action, and determine a cell with a searched signal quality greater than or equal to the first threshold as the second cell.

Optionally, in this embodiment of the present invention, with reference to fig. 19, as shown in fig. 22, the UE 1900 may further include a receiving unit 504. A receiving unit 504, configured to receive a target handover command after the performing unit 501 performs the target action, where the target handover command is used to instruct the UE to handover from the first cell to the target cell; the executing unit 501 is further configured to execute handover from the first cell to the target cell according to the target handover instruction received by the receiving unit 504.

Optionally, in this embodiment of the present invention, the executing unit 501 is further configured to execute a random access procedure in the target cell before performing handover from the first cell to the target cell according to the target handover instruction.

Optionally, in this embodiment of the present invention, the target handover instruction may include first indication information, where the first indication information is used to indicate whether the UE executes a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure. An executing unit 501, configured to perform handover from a first cell to a target cell when the first indication information indicates that the UE does not perform a target procedure in the target cell; or, in a case where the first indication information indicates that the UE performs the target procedure in the target cell, performing handover from the first cell to the target cell after performing the target procedure in the target cell.

Optionally, in this embodiment of the present invention, the target handover instruction may include second indication information, where the second indication information is used to indicate the UE to determine whether to execute the target procedure in the target cell according to the target information, and the target information is used to indicate whether the UE has executed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure. An executing unit 501, configured to determine, according to the target information, whether the UE has executed a target process in the target cell before performing handover from the first cell to the target cell according to the target handover instruction; an executing unit 501, configured to perform handover from a first cell to a target cell when a UE has performed a target procedure in the target cell; or, in a case where the UE does not perform the target procedure in the target cell, performing handover from the first cell to the target cell after performing the target procedure in the target cell.

Optionally, in this embodiment of the present invention, the target request message may include third indication information, where the third indication information is used to indicate that the UE generates an RLF or an HOF in the first cell.

Optionally, in this embodiment of the present invention, the target request message may be an RRC connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

The UE provided in the embodiment of the present invention can implement each process implemented by the UE in the foregoing method embodiments, and for avoiding repetition, detailed descriptions are not repeated here.

The embodiment of the invention provides a UE (user equipment), which can execute a target action under the condition that RLF or HOF occurs in a first cell, wherein the target action comprises at least one of the following actions: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs. That is, when the UE determines that the RLF or the HOF occurs in the first cell, the UE may notify the secondary node of the UE or the target node that the UE generates the RLF or the HOF in the first cell by executing the target action, so that the secondary node of the UE or the target node may send information notified by the UE to the master node of the UE, and further, the master node of the UE may determine that the RLF or the HOF occurs in the first cell, so as to instruct the UE to perform cell handover. Thus, the process of recovering the CA or the DC by the UE can be simplified, and the time delay of recovering the CA or the DC by the UE is reduced.

As shown in fig. 23, an embodiment of the present invention provides a node 600, where the node 600 is a secondary node of a UE, and the node 600 includes a receiving unit 601 and a transmitting unit 602. A receiving unit 601, configured to receive a target measurement result sent by a UE, where the target measurement result is sent by the UE when a first cell occurs RLF or HOF, and the first cell is a primary cell or a cell in a primary cell group; a sending unit 602, configured to send the target measurement result received by the receiving unit 601 to a master node, where the master node is a master node that provides a service for the UE before the RLF or the HOF occurs to the UE.

Optionally, in this embodiment of the present invention, the receiving unit 601 is specifically configured to receive, on a target SRB, a target measurement result sent by the UE, where the target SRB is a separation SRB or a second SRB, the separation SRB is a part of a first SRB, the first SRB is an SRB of the primary node, and the second SRB is an SRB of the secondary node.

The node (i.e., the secondary node of the UE) provided in the embodiment of the present invention can implement each process implemented by the secondary node in the foregoing method embodiments, and for avoiding repetition, detailed descriptions are not repeated here.

The embodiment of the invention provides a node, which is an auxiliary node of UE (user equipment), wherein the auxiliary node can receive a target measurement result sent by the UE, the target measurement result is sent by the UE under the condition that a first cell generates RLF (radio link failure) or HOF (hot handoff), and the first cell is a main cell or a cell in a main cell group; and transmitting the target measurement result to a master node, the master node serving the UE before the RLF or the HOF occurs to the UE. Namely, the auxiliary node forwards the target measurement result received from the UE to the main node to inform the main node that the UE generates RLF or HOF in the first cell, so that the process of recovering CA or DC by the UE can be simplified, and the time delay is reduced.

As shown in fig. 24, an embodiment of the present invention provides a node 700, where the node 700 is a node to which a cell searched by a UE belongs, and the node 700 includes a receiving unit 701 and a transmitting unit 702. A receiving unit 701, configured to receive a target request message sent by a UE, where the target request message is sent by the UE when a first cell has RLF or HOF, and the target request message is used to request to recover a radio link of the UE, where the first cell is a master cell or a cell in a master cell group; a sending unit 702, configured to send the target request message received by the receiving unit 701 to a master node, where the master node is a master node that provides a service for the UE before the RLF or the HOF occurs to the UE.

Optionally, in this embodiment of the present invention, the target request message may include indication information, where the indication information is used to indicate that the UE generates RLF or HOF in the first cell.

The node (i.e., the node to which the cell searched by the UE belongs) provided in the embodiment of the present invention can implement each process implemented by the target node in the foregoing method embodiments, and for avoiding repetition, detailed descriptions thereof are omitted here.

The embodiment of the invention provides a node, which is a node to which a cell searched by UE belongs, and receives a target request message sent by the UE, wherein the target request message is sent by the UE under the condition that RLF or HOF occurs in a first cell, the target request message is used for requesting to recover a wireless link of the UE, and the first cell is a main cell or a cell in a main cell group; and transmitting the target request message to a master node, the master node being a master node that serves the UE before the RLF or HOF occurs. That is, the node forwards a target request message received from the UE to the primary node to notify the primary node that the UE has RLF or HOF in the first cell, so that the process of recovering CA or DC by the UE can be simplified and the delay can be reduced.

As shown in fig. 25, an embodiment of the present invention provides a node 800, where the node 800 is a master node for serving a UE before RLF or HOF occurs in the UE, and the node 800 includes a receiving unit 801. A receiving unit 801, configured to receive first information, where the first information is triggered and sent by a UE when a first cell has an RLF or an HOF, where the first information includes at least one of a target measurement result of the UE and a target request message, the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

Optionally, in this embodiment of the present invention, as shown in fig. 26 in combination with fig. 25, the node 800 may further include a sending unit 802. A sending unit 802, configured to send a target handover command after the receiving unit 801 receives the first information, where the target handover command is used to instruct the UE to handover from the first cell to the target cell.

Optionally, in this embodiment of the present invention, the target handover instruction may include first indication information, where the first indication information is used to indicate whether the UE executes a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure.

Optionally, in this embodiment of the present invention, the target handover instruction may include second indication information, where the second indication information is used to indicate the UE to determine whether to execute the target procedure in the target cell according to the target information, and the target information is used to indicate whether the UE has executed the target procedure in the target cell, where the target procedure is a random access procedure or a partial procedure of the random access procedure.

The node (i.e., the master node that provides service to the UE before the RLF or the HOF occurs in the UE) provided in the embodiment of the present invention can implement each process implemented by the master node in the foregoing method embodiments, and for avoiding repetition, detailed descriptions are not repeated here.

The embodiment of the invention provides a node, which is a main node for providing service for UE before RLF or HOF occurs to the UE, wherein the main node receives first information, the first information is triggered and sent by the UE under the condition that RLF or HOF occurs to a first cell, the first information comprises at least one item of a target measurement result and a target request message of the UE, the target request message is used for requesting to recover a radio link of the UE, and the first cell is a main cell or a cell in a main cell group. Namely, the main node receives the first information and determines that the UE generates RLF or HOF in the first cell from the first information, thereby simplifying the process of recovering CA or DC by the UE and reducing time delay.

Fig. 27 is a schematic hardware structure diagram of a UE for implementing various embodiments of the present invention, where the UE900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910, and a power supply 911. Those skilled in the art will appreciate that the structure of the UE900 shown in fig. 27 does not constitute a limitation of the UE, and that the UE900 may include more or fewer components than shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the UE900 includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted UE, a wearable device, a pedometer, and the like.

Wherein, the processor 910 is configured to execute the target action by the UE when the first cell generates the RLF or the HOF. The target action includes at least one of: and sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE. The first cell is a main cell or a cell in a main cell group, and the target node is a node to which a second cell searched by the UE belongs.

In the UE provided in the embodiment of the present invention, the UE may execute a target action under the condition that the first cell generates the RLF or the HOF, where the target action includes at least one of the following actions: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE; the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs. That is, when the UE determines that the RLF or the HOF occurs in the first cell, the UE may notify the secondary node of the UE or the target node that the UE generates the RLF or the HOF in the first cell by executing the target action, so that the secondary node of the UE or the target node may send information notified by the UE to the master node of the UE, and further, the master node of the UE may determine that the RLF or the HOF occurs in the first cell, so as to instruct the UE to perform cell handover. Thus, the process of recovering the CA or the DC by the UE can be simplified, and the time delay of recovering the CA or the DC by the UE is reduced.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 901 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 910; in addition, the uplink data is transmitted to the base station. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 901 can also communicate with a network and other devices through a wireless communication system.

The UE900 provides wireless broadband internet access to the user through the network module 902, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 903 may convert audio data received by the radio frequency unit 901 or the network module 902 or stored in the memory 909 into an audio signal and output as sound. Also, the audio output unit 903 may also provide audio output related to a specific function performed by the UE900 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 903 includes a speaker, a buzzer, a receiver, and the like.

The input unit 904 is used to receive audio or video signals. The input Unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042, and the Graphics processor 9041 processes image data of a still picture or video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 906. The image frames processed by the graphic processor 9041 may be stored in the memory 909 (or other storage medium) or transmitted via the radio frequency unit 901 or the network module 902. The microphone 9042 can receive sounds and can process such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 901 in case of the phone call mode.

The UE900 also includes at least one sensor 905, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 9061 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 9061 and/or backlight when the UE900 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the UE attitude (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 905 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described in detail herein.

The display unit 906 is used to display information input by the user or information provided to the user. The Display unit 906 may include a Display panel 9061, and the Display panel 9061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 907 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the UE 900. Specifically, the user input unit 907 includes a touch panel 9071 and other input devices 9072. The touch panel 9071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 9071 (e.g., operations by a user on or near the touch panel 9071 using a finger, a stylus, or any other suitable object or accessory). The touch panel 9071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 910, receives a command from the processor 910, and executes the command. In addition, the touch panel 9071 may be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 907 may include other input devices 9072 in addition to the touch panel 9071. Specifically, the other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, and the like), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 9071 may be overlaid on the display panel 9061, and when the touch panel 9071 detects a touch operation on or near the touch panel 9071, the touch panel is transmitted to the processor 910 to determine the type of the touch event, and then the processor 910 provides a corresponding visual output on the display panel 9061 according to the type of the touch event. Although in fig. 27, the touch panel 9071 and the display panel 9061 are two independent components to implement the input and output functions of the UE900, in some embodiments, the touch panel 9071 and the display panel 9061 may be integrated to implement the input and output functions of the UE900, and the implementation is not limited herein.

The interface unit 908 is an interface for connecting an external device to the UE 900. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 908 may be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within the UE900 or may be used to transmit data between the UE900 and external devices.

The memory 909 may be used to store software programs as well as various data. The memory 909 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 909 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 910 is a control center of the UE900, connects various parts of the entire UE900 using various interfaces and lines, performs various functions of the UE900 and processes data by running or executing software programs and/or modules stored in the memory 909 and calling data stored in the memory 909, thereby performing overall monitoring of the UE 900. Processor 910 may include one or more processing units; optionally, the processor 910 may integrate an application processor and a modem processor, wherein the application processor mainly handles operating systems, user interfaces, application programs, and the like, and the modem processor mainly handles wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 910.

The UE900 may also include a power supply 911 (e.g., a battery) for powering the various components, and optionally, the power supply 911 may be logically connected to the processor 910 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.

In addition, the UE900 includes some functional modules that are not shown, and are not described herein again.

Optionally, an embodiment of the present invention further provides a UE, which includes a processor 910, a memory 909, and a computer program that is stored in the memory 909 and can be run on the processor 910, where the computer program is executed by the processor 910 to implement the processes of the foregoing method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not described here again.

Fig. 28 shows a hardware schematic diagram of a node according to an embodiment of the present invention. As shown in fig. 28, the node 1000 includes: a processor 1001, a transceiver 1002, a memory 1003, a user interface 1004, and a bus interface 1005.

The node provided in the embodiment of the present invention may be a secondary node of the UE (for example, the secondary node in the foregoing method embodiment), a node to which a cell searched for by the UE belongs (for example, a target node in the foregoing method embodiment), or a master node (for example, the master node in the foregoing method embodiment) that provides a service for the UE before RLF or HOF occurs to the UE.

In one case, the node shown in fig. 28 is a secondary node of the UE. In this case, the transceiver 1002 is configured to receive a target measurement result transmitted by the UE and transmit the target measurement result to the master node. The target measurement result is sent by the UE under the condition that the first cell generates RLF or HOF, and the first cell is a main cell or a cell in a main cell group; the master node is a master node that serves the UE before RLF or HOF occurs.

In another case, the node shown in fig. 28 is a node to which a cell searched by the UE belongs. In this case, the transceiver 1002 is configured to receive a target request message sent by the UE and send the target request message to the master node. The target request message is sent by the UE under the condition that the first cell generates RLF or HOF, the target request message is used for requesting to recover a wireless link of the UE, and the first cell is a main cell or a cell in a main cell group; the master node is a master node that serves the UE before RLF or HOF occurs.

In yet another case, the node shown in fig. 28 is the primary node serving the UE before RLF or HOF occurs. In this case, the transceiver 1002 is configured to receive first information, the first information being triggered and sent by the UE when the first cell has RLF or HOF, the first information including at least one of a target measurement result of the UE and a target request message, the target request message being used to request recovery of a radio link of the UE, and the first cell being a primary cell or a cell in a primary cell group.

Wherein the processor 1001 may be responsible for managing the bus architecture and general processing, the processor 1001 may be configured to read and execute programs in the memory 1003 to implement processing functions and control of the node 1000. The memory 1003 may store data used by the processor 1001 in performing operations. The processor 1001 and the memory 1003 may be integrated together or may be provided separately.

In this embodiment of the present invention, the node 1000 may further include: a computer program stored on the memory 1003 and executable on the processor 1001, which when executed by the processor 1001, performs the steps of the method provided by an embodiment of the present invention.

In fig. 28, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. Bus interface 1005 provides an interface. The transceiver 1002 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different UEs, the user interface 1004 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 910 shown in fig. 27 and/or the processor 1001 shown in fig. 28, the computer program implements each process of the method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a node) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information transmission method applied to User Equipment (UE), the method comprising:

the UE executes a target action under the condition that a Radio Link Failure (RLF) or a handover failure (HOF) occurs in a first cell, wherein the target action comprises at least one of the following actions: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE;

the first cell is a primary cell or a cell in a primary cell group, and the target node is a node to which a second cell searched by the UE belongs.

2. The method of claim 1, wherein the target action comprises sending a target measurement result to a secondary node of the UE;

before the performing the target action, the method further comprises:

and measuring according to the target measurement configuration information stored in the UE to obtain the target measurement result.

3. The method of claim 2, wherein the target measurement configuration information is any one of: the method comprises the steps that a main node configures measurement configuration information for the UE, the main node configures the measurement configuration information for the UE through a first Signaling Radio Bearer (SRB) of the main node, and the main node is used for providing service for the UE before RLF or HOF occurs to the UE.

4. The method of claim 3, wherein sending the target measurement result to the secondary node of the UE comprises:

and sending the target measurement result to the auxiliary node on a target SRB, wherein the target SRB is a separation SRB or a second SRB, the separation SRB is a part of the first SRB, and the second SRB is the SRB of the auxiliary node.

5. The method of claim 1, wherein the target action comprises sending a target request message to a target node;

before the performing the target action, the method further comprises:

and searching a cell, and determining a cell with the searched signal quality greater than or equal to a first threshold value as the second cell.

6. The method of any of claims 1-5, wherein after the performing the target action, the method further comprises:

receiving a target handover command, wherein the target handover command is used for instructing the UE to handover from the first cell to a target cell;

and executing the switching from the first cell to the target cell according to the target switching instruction.

7. The method of claim 6, wherein before performing handover from the first cell to the target cell according to the target handover command, the method further comprises:

performing a random access procedure in the target cell.

8. The method of claim 6, wherein the target handover command includes first indication information, and the first indication information is used to indicate whether the UE performs a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure;

the performing handover from the first cell to the target cell according to the target handover command includes:

performing handover from the first cell to the target cell if the first indication information indicates that the UE is not performing the target procedure in the target cell;

alternatively, the first and second electrodes may be,

performing handover from the first cell to the target cell after performing the target procedure in the target cell, in a case where the first indication information indicates that the UE performs the target procedure in the target cell.

9. The method according to claim 6, wherein the target handover command includes second indication information, the second indication information is used to indicate the UE to determine whether to execute a target procedure in the target cell according to target information, the target information is used to indicate whether the UE has executed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of a random access procedure;

before the performing the handover from the first cell to the target cell according to the target handover instruction, the method further includes:

determining whether the UE has performed the target procedure in the target cell according to the target information;

performing handover from the first cell to the target cell on a condition that the UE has performed the target procedure in the target cell;

alternatively, the first and second electrodes may be,

performing handover from the first cell to the target cell after performing the target procedure in the target cell without the UE performing the target procedure in the target cell.

10. The method of claim 1, wherein a third indication information is included in the target request message, and wherein the third indication information is used for indicating that the UE has RLF or HOF in the first cell.

11. The method according to claim 1 or 10, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

12. An information transmission method applied to a secondary node of User Equipment (UE), the method comprising:

receiving a target measurement result sent by the UE, wherein the target measurement result is sent by the UE under the condition that a first cell has Radio Link Failure (RLF) or handover failure (HOF), and the first cell is a main cell or a cell in a main cell group;

and sending the target measurement result to a main node, wherein the main node is used for providing service for the UE before RLF or HOF occurs to the UE.

13. The method of claim 12, wherein the receiving the target measurement result sent by the UE comprises:

and receiving the target measurement result sent by the UE on a target Signaling Radio Bearer (SRB), wherein the target SRB is a separation SRB or a second SRB, the separation SRB is a part of a first SRB, the first SRB is an SRB of the main node, and the second SRB is an SRB of the auxiliary node.

14. An information transmission method is applied to a target node, wherein the target node is a node to which a cell searched by User Equipment (UE) belongs, and the method comprises the following steps:

receiving a target request message sent by the UE, wherein the target request message is sent by the UE under the condition that a first cell has Radio Link Failure (RLF) or handover failure (HOF), and the target request message is used for requesting to recover the radio link of the UE, and the first cell is a main cell or a cell in a main cell group;

and sending the target request message to a main node, wherein the main node is the main node which provides service for the UE before RLF or HOF occurs to the UE.

15. The method of claim 14, wherein the target request message includes indication information indicating that the UE has RLF or HOF in the first cell.

16. The method according to claim 14 or 15, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

17. An information transmission method is applied to a main node, wherein the main node is used for providing service for User Equipment (UE) before Radio Link Failure (RLF) or handover failure (HOF) occurs to the UE, and the method comprises the following steps:

receiving first information, wherein the first information is triggered and sent by the UE under the condition that RLF or HOF occurs in a first cell, the first information comprises at least one of a target measurement result of the UE and a target request message, the target request message is used for requesting to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

18. The method of claim 17, wherein after receiving the first information, the method further comprises:

sending a target handover command, wherein the target handover command is used for instructing the UE to handover from the first cell to a target cell.

19. The method of claim 18, wherein the target handover command includes first indication information, and the first indication information is used to indicate whether the UE performs a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of a random access procedure.

20. The method of claim 18, wherein the target handover command includes second indication information, the second indication information is used to indicate the UE to determine whether to perform a target procedure in the target cell according to target information, the target information is used to indicate whether the UE has performed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure.

21. The method of claim 17, wherein a third indication information is included in the target request message, and wherein the third indication information is used to indicate that the UE is RLF or HOF in the first cell.

22. The method according to claim 17 or 21, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

23. A User Equipment (UE), characterized in that the UE comprises an execution unit;

the execution unit is configured to, when a Radio Link Failure (RLF) or a handover failure (HOF) occurs in a first cell, the UE performs a target action, where the target action includes at least one of: sending a target measurement result to an auxiliary node of the UE and sending a target request message to a target node, wherein the target request message is used for requesting to recover a wireless link of the UE;

24. The UE of claim 23, wherein the target action comprises sending a target measurement result to a secondary node of the UE, wherein the UE further comprises a measurement unit;

the measurement unit is configured to perform measurement according to target measurement configuration information stored in the UE before the execution unit executes the target action, so as to obtain the target measurement result.

25. The UE of claim 24, wherein the target measurement configuration information is any one of: the method comprises the steps that a main node configures measurement configuration information for the UE, the main node configures the measurement configuration information for the UE through a first Signaling Radio Bearer (SRB) of the main node, and the main node is used for providing service for the UE before RLF or HOF occurs to the UE.

26. The UE of claim 25, wherein the performing unit is specifically configured to send the target measurement result measured by the measuring unit to the secondary node on a target SRB, where the target SRB is a split SRB or a second SRB, the split SRB is a part of the first SRB, and the second SRB is an SRB of the secondary node.

27. The UE of claim 23, wherein the target action comprises sending a target request message to a target node, the UE further comprising a search element;

the searching unit is configured to search for a cell before the executing unit executes the target action, and determine a cell with a searched signal quality greater than or equal to a first threshold as the second cell.

28. The UE of any one of claims 23 to 27, wherein the UE further comprises a receiving unit;

the receiving unit is configured to receive a target handover command after the executing unit executes the target action, where the target handover command is used to instruct the UE to handover from the first cell to a target cell;

the executing unit is further configured to execute handover from the first cell to the target cell according to the target handover instruction received by the receiving unit.

29. The UE of claim 28, wherein the execution unit is further configured to perform a random access procedure in the target cell before performing handover from the first cell to the target cell according to the target handover instruction.

30. The UE of claim 28, wherein the target handover command includes first indication information, and the first indication information is used to indicate whether the UE performs a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of the random access procedure;

the performing unit is specifically configured to perform handover from the first cell to the target cell when the first indication information indicates that the UE does not perform the target procedure in the target cell; or, in a case where the first indication information indicates that the UE performs the target procedure in the target cell, performing handover from the first cell to the target cell after performing the target procedure in the target cell.

31. The UE of claim 28, wherein the target handover command includes second indication information, the second indication information is used to indicate the UE to determine whether to execute a target procedure in the target cell according to target information, the target information is used to indicate whether the UE has executed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of a random access procedure;

the execution unit is further configured to determine whether the UE has executed the target procedure in the target cell according to the target information before performing handover from the first cell to the target cell according to the target handover instruction;

the performing unit is specifically configured to perform handover from the first cell to the target cell if the UE has performed the target procedure in the target cell; or, in a case where the UE does not perform the target procedure in the target cell, performing handover from the first cell to the target cell after performing the target procedure in the target cell.

32. The UE of claim 23, wherein a third indication information is included in the target request message, and wherein the third indication information is used to indicate that RLF or HOF occurs in the first cell for the UE.

33. The UE of claim 23 or 32, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

34. A node, which is an auxiliary node of User Equipment (UE), is characterized in that the node comprises a receiving unit and a sending unit;

the receiving unit is configured to receive a target measurement result sent by the UE, where the target measurement result is sent by the UE when a Radio Link Failure (RLF) or a handover failure (HOF) occurs in a first cell, and the first cell is a master cell or a cell in a master cell group;

the sending unit is configured to send the target measurement result received by the receiving unit to a master node, where the master node is a master node that provides a service for the UE before the RLF or the HOF occurs to the UE.

35. The node according to claim 34, wherein the receiving unit is specifically configured to receive the target measurement result sent by the UE on a target signaling radio bearer SRB, where the target SRB is a split SRB or a second SRB, the split SRB is a part of a first SRB, the first SRB is an SRB of the primary node, and the second SRB is an SRB of the secondary node.

36. A node, which is a node to which a cell searched by User Equipment (UE) belongs, is characterized by comprising a receiving unit and a transmitting unit;

the receiving unit is configured to receive a target request message sent by the UE, where the target request message is sent by the UE when a Radio Link Failure (RLF) or a handover failure (HOF) occurs in a first cell, the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group;

the sending unit is configured to send the target request message received by the receiving unit to a master node, where the master node is a master node that provides a service for the UE before the RLF or the HOF occurs to the UE.

37. The node of claim 36, wherein the target request message includes indication information indicating that the UE is RLF or HOF in the first cell.

38. The node according to claim 36 or 37, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, an RLF recovery request message, or an HOF recovery request message.

39. A node being a primary node serving a user equipment, UE, before radio link failure, RLF, or handover failure, HOF, occurs for the UE, characterized in that the node comprises a receiving unit;

the receiving unit is configured to receive first information, where the first information is triggered and sent by the UE when a first cell has RLF or HOF, where the first information includes at least one of a target measurement result of the UE and a target request message, the target request message is used to request to recover a radio link of the UE, and the first cell is a primary cell or a cell in a primary cell group.

40. The node according to claim 39, wherein the node further comprises a transmitting unit;

the sending unit is configured to send a target handover command after the receiving unit receives the first information, where the target handover command is used to instruct the UE to handover from the first cell to a target cell.

41. The node according to claim 40, wherein the target handover command includes first indication information, and the first indication information is used to indicate whether the UE performs a target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of a random access procedure.

42. The node according to claim 40, wherein the target handover command includes second indication information, the second indication information is used to indicate the UE to determine whether to execute a target procedure in the target cell according to target information, the target information is used to indicate whether the UE has executed the target procedure in the target cell, and the target procedure is a random access procedure or a partial procedure of a random access procedure.

43. The node of claim 39, wherein a third indication information is included in the target request message, and wherein the third indication information is used to indicate that the UE has RLF or HOF in the first cell.

44. The node according to claim 39 or 43, wherein the target request message is a radio resource control, RRC, connection reestablishment request message, a RLF recovery request message, or a HOF recovery request message.

45. A user equipment, UE, characterized in that the UE comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the information transmission method according to any of claims 1 to 11.

46. A node being a secondary node of a user equipment, UE, characterized in that the node comprises a processor, a memory and a computer program stored on the memory and being executable on the processor, which computer program, when executed by the processor, carries out the steps of the information transmission method according to claim 12 or 13.

47. A node being a node to which a cell searched by a user equipment, UE, belongs, characterized in that the node comprises a processor, a memory and a computer program stored on the memory and being executable on the processor, the computer program, when being executed by the processor, implementing the steps of the information transmission method according to any of the claims 14 to 16.

48. A node being a primary node serving a user equipment, UE, before radio link failure, RLF, or handover failure, HOF, occurs, the node comprising a processor, a memory and a computer program stored on the memory and being executable on the processor, the computer program when executed by the processor implementing the steps of the information transmission method according to any of claims 17 to 22.

49. A communication system, characterized in that the communication system comprises a user equipment, UE, according to any of claims 23 to 33, a node according to claim 34 or 35, a node according to any of claims 36 to 38, and a node according to any of claims 39 to 44; alternatively, the first and second electrodes may be,

the communication system comprising the UE of claim 45, the node of claim 46, the node of claim 47, and the node of claim 48;

the node according to claim 34 or 35 and the node according to claim 46 being a secondary node of the UE, the node according to any one of claims 36 to 38 and the node according to claim 47 being a node to which a cell searched by the UE belongs, the node according to any one of claims 39 to 44 and the node according to claim 48 being a primary node serving the UE before radio link failure, RLF, or handover failure, HOF, occurs.

50. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the information transmission method according to any one of claims 1 to 22.