CN113923697B

CN113923697B - Link failure processing method and device, relay terminal and communication equipment

Info

Publication number: CN113923697B
Application number: CN202010661807.5A
Authority: CN
Inventors: 王达; 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2024-04-02
Anticipated expiration: 2040-07-10
Also published as: CN113923697A; WO2022007953A1

Abstract

The embodiment of the invention provides a link failure processing method, a device, a relay terminal and communication equipment, wherein the method comprises the following steps: transmitting target information through a second link between a relay terminal and a second device in case that a radio link failure or a beam failure occurs in a first link between the relay terminal and the first device; the target information is used for indicating that the first link has radio link failure or beam failure. When the relay terminal determines that the first link fails in radio link or beam fails, the relay terminal notifies the relayed terminal or the network device through the second link, so that the relayed device or the network device can know that the other link of the relay fails in RLF or beam, and accordingly corresponding operation is executed.

Description

Link failure processing method and device, relay terminal and communication equipment

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for processing link failure, a relay terminal, and a communication device.

Background

The traditional wireless communication adopts a cellular network communication mode, namely, a terminal and network side equipment transmit uplink and downlink data or control information through a Uu interface.

Direct communication refers to a manner in which nearby terminals can transmit data over a direct communication link (also referred to as a Sidelink or PC 5) within a short range. The wireless interface to which the sidlink link corresponds is referred to as a direct communication interface (also referred to as a sidlink interface or PC5 interface).

For the existing 5G Uu interface, when the link between the terminal and the network is broken, the terminal determines that the link between the terminal and the network has radio link Failure (Radio Link Failure, RLF) or Beam Failure (Beam Failure), and the terminal tries to recover the link or performs cell reselection. Similar to Uu interface, the link generating terminal between the access and backhaul integrated (Integrated Access and Backhaul, IAB) node and the parent node determines that the link between the IAB node and the parent node generates RLF, and the IAB node sends RLF notification information to the child node to notify the child node that RLF occurs between the child node and the parent node, so that the access and backhaul service can not be provided for the child node. After receiving the RLF notification information sent by the parent node, the child node performs cell reselection, so as to select other IAB nodes for access, and perform subsequent service transmission.

One solution to extend network coverage is to introduce relays. The relay may be a terminal having a relay function.

For terminal-to-network relay, the interface between the relay and the network uses the Uu interface, and the interface between the relay terminal and the terminal being relayed (which may be simply referred to as the far-end terminal) uses the PC5 interface (also referred to as the direct communication interface, which may be described as the sidlink). The link between the relay and the network may be referred to as a Backhaul link (Backhaul link) for the remote terminal.

For terminal-to-terminal relay, the interface used between the relay terminal and the remote terminal is a direct communication interface.

Links at both ends of the relay, for example for terminal-to-network relay, include: uu links relayed to the network and Sidelink links relayed to the remote terminals; for terminal-to-terminal relay, the links at both ends of the relay include: relay to the sip link between the remote terminals 1 and relay to the sip link with the remote terminal 2.

One of the links at the two ends of the relay has RLF or failed beam connection, and the other end terminal or network is not aware, which causes the data of the other end link to be still transmitted, but the relay terminal cannot successfully forward. There is no corresponding solution to the above problem.

Disclosure of Invention

The embodiment of the invention aims to provide a link failure processing method, a device, a relay terminal and communication equipment, so as to solve the problem that the existing radio link failure mechanism cannot use a relay scene.

In order to achieve the above object, the present invention provides a method for processing link failure, applied to a relay terminal, including:

transmitting target information through a second link between a relay terminal and a second device in case that a radio link failure or a beam failure occurs in a first link between the relay terminal and the first device;

the target information is used for indicating that the first link has radio link failure or beam failure.

Wherein, in the case that the first device is a network device, the first link is a Uu link between a relay terminal and the network device,

or,

in the case where the first device is a relayed terminal, the first link is a direct communication link between the relay terminal and the relayed terminal.

Wherein, in the case that the first link is a Uu link, the relay terminal is in at least one of the following states: attempting to recover Uu link, making cell reselection, and failing to access the network.

Wherein, in the case that the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device fails to restore the connection with the first device.

Wherein the sending the target information through the second link includes:

according to the current state of the relay terminal, target information is sent through the second link;

the target information carries indication information of the current state of the relay terminal, or the target information implicitly indicates the current state of the relay terminal.

Wherein the method further comprises at least one of:

after the relay terminal recovers the Uu link, transmitting Uu link recovery indication information to the second equipment;

after the relay terminal is successfully accessed into the reselected cell, sending cell indication information of successful access to the second equipment;

and after the relay terminal recovers the direct communication link with the relayed terminal, sending direct communication link recovery indication information to the second device.

The target information also carries identification information of a first device, and the direct communication link with radio link failure or beam failure is indirectly indicated through the identification information of the first device.

The embodiment of the invention also provides a link failure processing method, which is applied to the second equipment and comprises the following steps:

receiving target information sent by a relay terminal through a second link; the second link is a link between the relay terminal and the second device;

the target information is used for indicating that a first link between the relay terminal and the first equipment has radio link failure or beam failure.

or,

Wherein, in case the first link is a Uu link, the method further comprises:

stopping transmitting data to the first device and/or reselecting the relay terminal.

Wherein, in case the first link is a direct communication link, the method further comprises at least one of:

stopping transmitting data to the relayed terminal;

releasing the context of the relayed terminal;

releasing Radio Link Control (RLC) channel mapping of the first link and the second link;

And (5) reselecting the relay terminal.

Wherein the method further comprises:

determining the current state of the relay terminal according to the indication information of the current state of the relay terminal carried by the target information;

or,

and determining the current state of the relay terminal indicated by the target information implicitly according to the target information.

Wherein the method further comprises at least one of:

if the current state of the relay terminal is that the Uu link is attempted to be recovered or the cell reselection is carried out, reducing or stopping the data sent to the network equipment through the relay terminal;

and if the current state of the relay terminal is that the network cannot be accessed, reselecting the relay terminal.

Wherein the method further comprises at least one of:

Restoring data transmitted to network equipment through a relay terminal according to Uu link restoration instruction information transmitted by the relay terminal;

and performing cell access according to the indication information of the successfully accessed cell sent by the relay terminal.

Wherein the method further comprises:

and if the current state of the relay terminal is that the direct communication link between the relay terminal and the first equipment is attempted to be restored, reducing or stopping the data transmitted to the first equipment through the relay terminal.

If the current state of the relay terminal is that the connection with the first device cannot be restored, the method further comprises at least one of the following steps:

stopping transmitting data to the first device;

releasing the context of the first device;

and (5) reselecting the relay terminal.

Wherein the method further comprises:

and recovering the data transmitted to the first equipment through the relay terminal according to the direct communication link recovery instruction information transmitted by the relay terminal.

The embodiment of the invention also provides a processing device for link failure, which is applied to the relay terminal and comprises the following steps:

a sending module, configured to send target information through a second link between a relay terminal and a second device when a radio link failure or a beam failure occurs in a first link between the relay terminal and the first device;

The embodiment of the invention also provides a relay terminal, which comprises: a transceiver, a memory, a processor and computer program instructions stored on the memory and executable on the processor, the transceiver receiving and transmitting data under control of the processor, the processor for reading the program instructions in the memory, performing the operations of:

or,

Wherein the processor is further configured to read the program instructions in the memory, and perform the following operations:

Wherein the processor is further configured to read the program instructions in the memory and perform at least one of:

The embodiment of the invention also provides a processing device for link failure, which is applied to the second equipment and comprises:

the receiving module is used for receiving the target information sent by the relay terminal through the second link; the second link is a link between the relay terminal and the second device;

The embodiment of the invention also provides a communication device, which is a second device, comprising: a transceiver, a memory, a processor and computer program instructions stored on the memory and executable on the processor, the transceiver receiving and transmitting data under control of the processor, the processor for reading the program instructions in the memory, performing the operations of:

Or,

and stopping transmitting data to the first equipment and/or reselecting the relay terminal under the condition that the first link is a Uu link.

Wherein, in the case that the first link is a direct communication link, the processor is further configured to read the program instructions in the memory, perform at least one of:

stopping transmitting data to the relayed terminal;

releasing the context of the relayed terminal;

and (5) reselecting the relay terminal.

or,

If the current state of the relay terminal is that the connection with the first device cannot be restored, the processor is further configured to read the program instruction in the memory, and execute the following operations:

stopping transmitting data to the first device;

releasing the context of the first equipment end;

and (5) reselecting the relay terminal.

Embodiments of the present invention also provide a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of a method of handling link failure as described above.

The technical scheme of the invention has at least the following beneficial effects:

according to the link failure processing method, the device, the relay terminal and the communication equipment, when the relay terminal determines that the first link has radio link failure or beam failure, the relay terminal informs the relayed terminal or the network equipment through the second link, so that the relayed terminal or the network equipment can know that the other link of the relay has RLF or beam failure, and corresponding operation is executed.

Drawings

Fig. 1 shows one of the schematic step diagrams of the link failure processing method provided in the embodiment of the present invention;

FIG. 2 is a second step of the method for handling link failure according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a link failure processing apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a relay terminal according to an embodiment of the present invention;

fig. 5 is a second schematic structural diagram of a link failure processing apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an embodiment of the present invention provides a link failure processing method, which is applied to a relay terminal, and includes:

step 11, in the case that a radio link failure or a beam failure occurs in a first link between a relay terminal and a first device, sending target information through a second link between the relay terminal and a second device; the target information is used for indicating that the first link has radio link failure or beam failure.

Note that, the relay scenario includes: terminal-to-Network Relay (UE-to-Network Relay), terminal-to-terminal Relay (UE-to-UE Relay).

Optionally, in the case that the first device is a network device, the first link is a Uu link between a relay terminal and the network device,

alternatively, in the case where the first device is a relayed terminal, the first link is a direct communication link between the relay terminal and the relayed terminal.

For example, in a terminal-to-network relay scenario, the first link is a Uu link between the relay terminal and the network device, and the second link is a direct communication link between the relay terminal and the relayed terminal; or, the first link is a direct communication link between the relay terminal and the relayed terminal, and the second link is a Uu link between the relay terminal and the network equipment.

For another example, in a terminal-to-terminal relay scenario, the first link is a direct communication link between the relay terminal and a first relayed terminal (which may be referred to as remote UE 1), and the second link is a direct communication link between the relay terminal and a second relayed terminal (which may be referred to as remote UE 2); alternatively, the first link is a direct communication link between the relay terminal and a second relayed terminal (may be referred to as remote UE 2), and the second link is a direct communication link between the relay terminal and the first relayed terminal (may be referred to as remote UE 1).

As an alternative embodiment, in the case that the first link is a Uu link, the relay terminal is in at least one of the following states: attempting to recover Uu link, making cell reselection, and failing to access the network.

As another alternative embodiment, in the case that the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device (relayed terminal) fails to restore the connection with the first device (relayed terminal).

When the first link is a direct communication link, the target information also carries identification information of a first device (a relayed terminal), and the direct communication link with radio link failure or beam failure is indirectly indicated through the identification information of the first device. For example, the target information also carries ID information of the remote UE, and is used for the second device to determine which remote UE and the relay terminal have RLF or beam failure on the link between them.

Correspondingly, based on the current state of the relay terminal, the step 11 includes:

In one aspect, the relay terminal may not send any indication information to the second device when attempting to recover the Uu link. In this case, if the second device is a network device, the relay terminal normally receives the data sent to the network by the relay terminal, and the relay terminal caches the data so that after the Uu link is restored, the data can be continuously transmitted to the network for the relay terminal, or the data of the network can be forwarded for the relay terminal.

On the other hand, the relay terminal attempts to restore the direct communication link with the relayed terminal, and the relay terminal may not transmit any indication information to the second device. In this case, if the second device is a relayed terminal, the relay terminal normally receives data sent by the network device or another relayed terminal to the relayed terminal, and the relay terminal caches the data so that after the direct path link is restored, the data sent by the network or another relayed terminal to the relayed terminal can be forwarded continuously, or the data sent by the relayed terminal to the network or another relayed terminal can be forwarded.

Optionally, in the foregoing embodiment of the present invention, the method further includes at least one of:

after the relay terminal recovers the Uu link, transmitting Uu link recovery indication information to the second device, so that the second device can recover the normal data transmission rate transmitted to the first device;

after the relay terminal successfully accesses the reselected cell, sending cell indication information of successful access to the second device, so that the second device can perform cell access, and the network device can conveniently reestablish the context of the second device and/or the RLC channel mapping between the first link and the second link;

and after the relay terminal recovers the direct communication link with the relayed terminal, sending direct communication link recovery indication information to the second device, so that the second device can recover the normal data transmission rate sent to the first device.

In summary, in the embodiment of the present invention, when the relay terminal determines that the first link has radio link failure or beam failure, the relay terminal notifies the relayed terminal or the network device through the second link, so that the relayed terminal or the network device can learn that another link of the relay has RLF or beam failure, thereby executing a corresponding operation.

As shown in fig. 2, the embodiment of the present invention further provides a link failure processing method, which is applied to a second device, where the second device may be a network device or a relayed terminal; the method comprises the following steps:

step 21, receiving target information sent by the relay terminal through a second link; the second link is a link between the relay terminal and the second device; the target information is used for indicating that a first link between the relay terminal and the first equipment has radio link failure or beam failure.

As an optional embodiment of the invention, in case the first link is a Uu link, the method further comprises:

As another optional embodiment of the invention, in case the first link is a direct communication link, the method further comprises at least one of:

stopping transmitting data to the relayed terminal;

releasing the context of the relayed terminal;

and (5) reselecting the relay terminal.

For example, where the first link is a direct communication link and the second device is a relayed terminal, the second device releases RLC channel mappings for the first direct communication link (i.e., the first link) and the second direct communication link (i.e., the second link).

For another example, where the first link is a direct communication link and the second device is a network device, the second device releases RLC channel mappings for the direct communication link (i.e., the first link) and Uu link (i.e., the second link).

Optionally, in the foregoing embodiment of the present invention, the method further includes:

or,

Wherein, in the case that the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device (relayed terminal) fails to restore the connection with the first device (relayed terminal).

When the first link is a direct communication link, the target information also carries identification information of a first device, and the direct communication link with radio link failure or beam failure is indirectly indicated through the identification information of the first device. For example, the target information also carries ID information of the remote UE, and is used for the second device to determine which remote UE and the relay terminal have RLF or beam failure on the link between them.

Correspondingly, when the first link is a Uu link, based on the current state of the relay terminal, the method further comprises at least one of the following steps:

if the current state of the relay terminal is that the Uu link is attempted to be restored or cell reselection is performed, reducing or stopping data sent to the network equipment through the relay terminal (so as to reduce the probability of data congestion of the relay terminal);

if the current state of the relay terminal is that the network cannot be accessed (i.e. the relay terminal cannot continue to forward data to the relayed terminal or the network device), the second device needs to reselect the relay terminal; a new relay terminal is reselected so as to continue transmitting data to the relayed terminal or the network device or to receive data of the network or the relayed terminal through the new relay terminal.

Further, the method further comprises at least one of:

restoring data transmitted to network equipment through a relay terminal according to Uu link restoration instruction information transmitted by the relay terminal; for example, restoring the normal data transmission rate to the network device;

according to the indication information of the successfully accessed cell sent by the relay terminal, performing cell access; to facilitate the network device reestablishing the relayed terminal context and/or RLC channel mapping of the first link with the second link.

Correspondingly, when the first link is a direct communication link, based on the current state of the relay terminal, the method further comprises:

and if the current state of the relay terminal is that the direct communication link between the relay terminal and the first device is attempted to be restored, reducing or stopping the data transmitted to the first device (the relayed terminal) through the relay terminal so as to reduce the probability of data congestion of the relay terminal.

Correspondingly, when the first link is a direct communication link, based on the current state of the relay terminal, if the current state of the relay terminal is that the connection with the first device cannot be recovered (i.e. the relay terminal cannot continue to receive the network device or the data sent by the relay terminal to another relayed terminal), the method further includes at least one of the following:

stopping transmitting data to the first device;

releasing the context of the first device;

and (5) reselecting the relay terminal.

For example, the first link is a direct communication link, and the second device is a network device, the second device may further notify the core network that the network device loses the connection of the relayed terminal corresponding to the first link.

For another example, when the first link is a direct communication link and the second device is a relayed terminal, if the second device is in the network control mode, the second device needs to notify the network device, so that the network device releases the context of the relayed terminal corresponding to the first link, the connection between the second device and another relayed terminal, and the RLC channel of the first link and the second link are mapped.

Further, the method further comprises:

and recovering the data transmitted to the first equipment through the relay terminal according to the direct communication link recovery instruction information transmitted by the relay terminal. For example, the network device or the relayed terminal resumes the data transmission rate sent to the relayed terminal via the relay terminal.

In order to more clearly describe the link failure processing method provided by the embodiment of the present invention, the following description is made with reference to several examples.

Example one, for terminal to network relay, RLF or beam failure occurs when Uu link

The relay UE (relay terminal) determines which state is as follows: attempting to recover Uu link, reselecting cell, and unable to access network; or the relay UE directly transmits the indication information.

When the relay UE is attempting to restore the Uu link, any indication information may not be sent to the remote UE (relayed terminal), or first indication information may be sent to the remote UE, where the first indication information includes status information of the relay terminal; or alternatively, the first and second heat exchangers may be,

when the relay UE performs cell reselection, second indication information is sent to the remote UE, wherein the second indication information comprises state information of the relay terminal; or alternatively, the first and second heat exchangers may be,

when the relay UE cannot access the network, third indication information is sent to the remote UE, wherein the third indication information comprises the state information of the relay terminal; or alternatively, the first and second heat exchangers may be,

the relay UE directly transmits the indication information.

When the remote UE receives the first indication information, the remote UE reduces or stops data sent to the network through the relay UE; optionally, after the relay UE resumes the connection, sending connection resuming indication information to the remote UE, where the remote UE may resume a normal transmission rate sent to the network device; or alternatively, the first and second heat exchangers may be,

When the remote UE receives the second indication information, the relay UE performs cell reselection so that the remote UE reduces or stops data sent to the network through the relay UE; after the relay UE successfully accesses the cell, the relay UE sends cell indication information of successful access to the remote UE, and the remote UE needs to perform cell access; or alternatively, the first and second heat exchangers may be,

when the remote UE receives the third indication information, a relay reselection is needed, and a new relay is reselected so as to continuously send data to the network or receive the data of the network through the new relay; or alternatively, the first and second heat exchangers may be,

when the remote UE receives the indication information, a relay reselection is required, and a new relay is reselected so as to continue sending data to the network or receiving data of the network through the new relay.

Example two, for terminal-to-network relay, RLF or beam failure occurs when SL link (direct communication link)

The relay UE determines which state is as follows: attempting to restore the SL link with the remote UE, failing to restore the connection with the remote UE; or the relay UE directly transmits the indication information;

when the relay UE is attempting to restore the SL link with the remote UE, no indication information may be sent to the network device, or fourth indication information may be sent to the network device, where the fourth indication information includes an indication information type and ID information of the remote UE; or alternatively, the first and second heat exchangers may be,

When the relay UE cannot recover the connection with the remote UE, fifth indication information is sent to the network equipment, wherein the fifth indication information comprises indication information types and ID information of the remote UE; or alternatively, the first and second heat exchangers may be,

the relay UE directly transmits the indication information.

When the network equipment receives the fourth indication information, the network equipment reduces or stops data sent to the remote UE through the relay UE; optionally, after the relay UE resumes the connection, sending connection resuming indication information to the network device, where the network device may resume the transmission rate normally sent to the remote UE; or alternatively, the first and second heat exchangers may be,

when the network equipment receives the fifth indication information, the data transmitted to the remote UE need to be stopped, the context of the remote UE and/or the RLC channel mapping of the SL-Uu link are released, and the core network is informed that the network equipment loses the connection of the remote UE; or alternatively, the first and second heat exchangers may be,

when the network device receives the indication information, the data transmitted to the remote UE needs to be stopped, the context of the remote UE and/or RLC channel mapping of the SL-Uu link are released, and the core network is notified that the network device loses the connection of the remote UE.

Example three, RLF or beam failure occurs for the direct communication link for terminal-to-terminal relay

The relay UE determines which state is as follows: attempting to restore the SL link with remote UE1, failing to restore the connection with remote UE1, attempting to restore the SL link with remote UE2, failing to restore the connection with remote UE 2; or the relay UE directly transmits the indication information.

When the relay UE is attempting to restore the SL link with the remote UE1, no indication information may be transmitted to the remote UE2, or a sixth indication information may be transmitted to the remote UE2, where the sixth indication information includes an indication information type and ID information of the remote UE 1; or alternatively, the first and second heat exchangers may be,

when the relay UE is attempting to restore the SL link with the remote UE2, no indication information may be sent to the remote UE1, or a seventh indication information may be sent to the remote UE1, where the seventh indication information includes an indication information type and ID information of the remote UE 2; or alternatively, the first and second heat exchangers may be,

when the relay UE cannot recover the connection with the remote UE1, sending eighth indication information to the remote UE2, wherein the eighth indication information comprises an indication information type and ID information of the remote UE 1; or alternatively, the first and second heat exchangers may be,

when the relay UE cannot recover the connection with the remote UE2, transmitting ninth indication information to the remote UE1, wherein the ninth indication information comprises an indication information type and ID information of the remote UE 2; or alternatively, the first and second heat exchangers may be,

the relay UE directly transmits the indication information.

When the remote UE2 receives the sixth indication information, the remote UE2 reduces or stops the data transmitted to the remote UE1 via the relay UE; optionally, after the relay UE resumes the connection with the remote UE1, sending connection resuming indication information to the remote UE2, where the remote UE2 may resume the transmission rate normally sent to the remote UE 1; or alternatively, the first and second heat exchangers may be,

When the remote UE1 receives the seventh indication information, the remote UE1 reduces or stops the data transmitted to the remote UE 2; optionally, after the relay UE resumes the connection with the remote UE2, sending connection resuming indication information to the remote UE1, where the remote UE1 may resume the transmission rate normally sent to the remote UE 2; or alternatively, the first and second heat exchangers may be,

when the remote UE2 receives the eighth indication information, it is necessary to suspend data transmitted to the remote UE1, release the context of the remote UE1 and/or RLC channel mapping of the SL-SL link, or perform relay reselection. If remote UE2 is in network control mode, remote UE2 also needs to notify network device in order for network device to release the context of remote UE1, link between remote UE2 and remote UE1, and/or RLC channel mapping of SL-SL link, or relay reselection; or alternatively, the first and second heat exchangers may be,

when the remote UE1 receives the ninth indication information, it is necessary to suspend data transmitted to the remote UE2, release the context of the remote UE2 and/or RLC channel mapping of the SL-SL link, or perform relay reselection. If remote UE1 is in network control mode, then remote UE1 also needs to notify the network device in order for the network device to release the context of remote UE2, link between remote UE1 and remote UE2, and/or RLC channel mapping of SL-SL link, or relay reselection; or alternatively, the first and second heat exchangers may be,

When the remote UE2 receives the indication information, it is necessary to suspend data transmitted to the remote UE1, release the context of the remote UE1 and/or RLC channel mapping of the SL-SL link, or perform relay reselection. If remote UE2 is in network control mode, remote UE2 also needs to notify network device in order for network device to release the context of remote UE1, link between remote UE2 and remote UE1, and/or RLC channel mapping of SL-SL link, or relay reselection; or alternatively, the first and second heat exchangers may be,

when the remote UE1 receives the indication information, it is necessary to suspend data transmitted to the remote UE2, release the context of the remote UE2 and/or RLC channel mapping of the SL-Uu link, or perform relay reselection. If remote UE1 is in network control mode, then remote UE1 also needs to inform the network device in order for the network device to release the context of remote UE2, the link between remote UE1 and remote UE2, and/or RLC channel mapping of the SL-SL link, or relay reselection.

As shown in fig. 3, an embodiment of the present invention further provides a processing apparatus for link failure, which is applied to a relay terminal, including:

a transmitting module 31, configured to transmit target information through a second link between a relay terminal and a second device when a radio link failure or a beam failure occurs in a first link between the relay terminal and the first device;

As an alternative embodiment of the present invention, in case the first device is a network device, the first link is a Uu link between a relay terminal and the network device,

or,

As an optional embodiment of the present invention, in a case where the first link is a Uu link, the relay terminal is in at least one of the following states: attempting to recover Uu link, making cell reselection, and failing to access the network.

As an optional embodiment of the present invention, in a case where the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device fails to restore the connection with the first device.

As an alternative embodiment of the present invention, the transmitting module includes:

a transmitting sub-module, configured to transmit target information through the second link according to a current state of the relay terminal;

As an alternative embodiment of the invention, the device further comprises at least one of the following:

the first indication module is used for sending Uu link recovery indication information to the second equipment after the relay terminal recovers the Uu link;

the second indication module is used for sending cell indication information of successful access to the second equipment after the relay terminal is successfully accessed to the reselected cell;

and the third indication module is used for sending direct communication link restoration indication information to the second equipment after the relay terminal restores the direct communication link with the relayed terminal.

As an optional embodiment of the invention, the target information further carries identification information of a first device, and the direct communication link where radio link failure or beam failure occurs is indirectly indicated through the identification information of the first device.

In the embodiment of the invention, when the relay terminal determines that the first link has radio link failure or beam failure, the relay terminal notifies the relayed terminal or the network equipment through the second link, so that the relayed terminal or the network equipment can know that the other link of the relay has RLF or beam failure, and accordingly corresponding operation is executed.

The processing device for link failure provided in the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.

As shown in fig. 4, an embodiment of the present invention further provides a relay terminal, including: transceiver 420, memory 410, processor 400, and computer program instructions stored on memory 410 and executable on processor 400, transceiver 420 receiving and transmitting data under control of processor 400, processor 400 being configured to read the program instructions in memory to perform the following operations:

or,

As an alternative embodiment of the present invention, the processor 400 is further configured to read the program instructions in the memory, and perform the following operations:

As an alternative embodiment of the present invention, the processor 400 is further configured to read the program instructions in the memory, and perform at least one of the following operations:

The relay terminal provided by the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.

As shown in fig. 5, an embodiment of the present invention further provides a processing apparatus for link failure, which is applied to a second device, including:

A receiving module 51, configured to receive target information sent by the relay terminal through the second link; the second link is a link between the relay terminal and the second device;

or,

As an optional embodiment of the invention, in case the first link is a Uu link, the apparatus further comprises:

and the first processing module is used for stopping data transmission to the first equipment and/or reselecting the relay terminal.

As an alternative embodiment of the present invention, in case the first link is a direct communication link, the method further comprises at least one of:

the second processing module is used for stopping transmitting data to the relayed terminal;

a third processing module, configured to release a context of the relayed terminal;

A fourth processing module, configured to release radio link control RLC channel mapping of the first link and the second link;

and the fifth processing module is used for reselecting the relay terminal.

As an alternative embodiment of the present invention, the apparatus further comprises:

the state determining module is used for determining the current state of the relay terminal according to the indication information of the current state of the relay terminal carried by the target information;

or determining the current state of the relay terminal implicitly indicated by the target information according to the target information.

A sixth processing module, configured to reduce or stop data sent to the network device via the relay terminal if the current state of the relay terminal is that a Uu link is attempted to be restored or a cell reselection is performed;

and a seventh processing module, configured to reselect the relay terminal if the current state of the relay terminal is that the network cannot be accessed.

As an alternative embodiment of the invention, the method further comprises at least one of:

an eighth processing module, configured to restore data sent to a network device via a relay terminal according to Uu link restoration instruction information sent by the relay terminal;

and the ninth processing module is used for carrying out cell access according to the indication information of the successfully accessed cell sent by the relay terminal.

and a tenth processing module, configured to reduce or stop data sent to the first device via the relay terminal if the current state of the relay terminal is that the direct communication link with the first device is attempted to be restored.

As an optional embodiment of the present invention, if the current state of the relay terminal is that the connection with the first device cannot be restored, the apparatus further includes at least one of the following:

An eleventh processing module configured to stop transmitting data to the first device;

a twelfth processing module for releasing the context of the first device;

a thirteenth processing module, configured to release radio link control RLC channel mapping of the first link and the second link;

and the fourteenth processing module is used for reselecting the relay terminal.

and a fifteenth processing module, configured to recover data sent to the first device via the relay terminal according to the direct communication link recovery instruction information sent by the relay terminal.

As shown in fig. 6, the embodiment of the present invention further provides a communication device, where the communication device is a second device, and includes: a transceiver 620, a memory 610, a processor 600 and computer program instructions stored on the memory 610 and executable on the processor 600, the transceiver 620 receiving and transmitting data under control of the processor 600, the processor 600 being adapted to read the program instructions in the memory, to perform the following operations:

or,

As an alternative embodiment of the present invention, the processor 600 is further configured to read the program instructions in the memory, and perform the following operations:

As an alternative embodiment of the present invention, in the case that the first link is a direct communication link, the processor 600 is further configured to read the program instructions in the memory, and perform at least one of the following operations:

stopping transmitting data to the relayed terminal;

Releasing the context of the relayed terminal;

and (5) reselecting the relay terminal.

or,

As an alternative embodiment of the invention, the relay terminal is in at least one of the following states in case the first link is a direct communication link: attempting to restore the direct communication link with the first device fails to restore the connection with the first device.

As an alternative embodiment of the present invention, the processor 600 is further configured to read the program instructions in the memory, and perform at least one of the following operations:

As an optional embodiment of the present invention, if the current state of the relay terminal is that the connection with the first device cannot be restored, the processor 600 is further configured to read the program instructions in the memory, and perform at least one of the following operations:

Stopping transmitting data to the first device;

releasing the context of the first device;

and (5) reselecting the relay terminal.

The communication device provided in the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.

The embodiment of the invention also provides a computer readable storage medium, on which computer program instructions are stored, which when executed by a processor, implement the processes of the link failure processing method embodiment described above, and achieve the same technical effects, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. The link failure processing method is applied to a relay terminal and is characterized by comprising the following steps:

the target information is used for indicating that the first link has radio link failure or beam failure;

or,

in the case that the first device is a relayed terminal, the first link is a direct communication link between the relay terminal and the relayed terminal;

in the case that the first link is a Uu link, the relay terminal is in at least one of the following states: attempting to recover Uu link, reselecting cell, and unable to access network;

in the case that the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device, failing to restore the connection with the first device;

the sending the target information through the second link includes:

2. The method of claim 1, further comprising at least one of:

3. The method of claim 1, wherein the target information further carries identification information of a first device by which the direct communication link for which a radio link failure or a beam failure occurred is indirectly indicated.

4. The link failure processing method is applied to the second equipment and is characterized by comprising the following steps:

the target information is used for indicating that a first link between the relay terminal and the first equipment has radio link failure or beam failure;

Or,

wherein the method further comprises:

or,

5. The method of claim 4, wherein in the case where the first link is a Uu link, the method further comprises:

6. The method of claim 4, wherein, in the case where the first link is a direct communication link, the method further comprises at least one of:

Stopping transmitting data to the relayed terminal;

releasing the context of the relayed terminal;

and (5) reselecting the relay terminal.

7. The method of claim 4, further comprising at least one of:

8. The method of claim 7, further comprising at least one of:

9. The method according to claim 4, wherein the method further comprises:

10. The method of claim 4, wherein if the current state of the relay terminal is that the connection with the first device cannot be restored, the method further comprises at least one of:

stopping transmitting data to the first device;

releasing the context of the first device;

and (5) reselecting the relay terminal.

11. The method according to claim 9, wherein the method further comprises:

12. A link failure processing apparatus applied to a relay terminal, comprising:

Or,

wherein, the sending module includes:

13. A relay terminal, comprising: a transceiver, a memory, a processor, and computer program instructions stored on the memory and executable on the processor; the transceiver receives and transmits data under the control of a processor, the processor is used for reading program instructions in a memory, and the following operations are performed:

or,

14. The relay terminal of claim 13, wherein the processor is further configured to read the program instructions in the memory to perform at least one of:

15. The relay terminal of claim 13, wherein the target information further carries identification information of a first device, and wherein the direct communication link on which a radio link failure or a beam failure occurs is indirectly indicated by the identification information of the first device.

16. A link failure handling apparatus for use with a second device, comprising:

or,

wherein the apparatus further comprises:

or determining the current state of the relay terminal implicitly indicated by the target information according to the target information;

in the case that the first link is a direct communication link, the relay terminal is in at least one of the following states: attempting to restore the direct communication link with the first device fails to restore the connection with the first device.

17. A communication device, the communication device being a second device, comprising: a transceiver, a memory, a processor, and computer program instructions stored on the memory and executable on the processor; the transceiver receives and transmits data under the control of a processor, the processor is used for reading program instructions in a memory, and the following operations are performed:

or,

Or,

determining the current state of the relay terminal implicitly indicated by the target information according to the target information;

18. The communication device of claim 17, wherein the processor is further configured to read program instructions in the memory to perform the following:

19. The communication device of claim 17, wherein, in the case where the first link is a direct communication link, the processor is further configured to read program instructions in memory to perform at least one of:

stopping transmitting data to the relayed terminal;

releasing the context of the relayed terminal;

and (5) reselecting the relay terminal.

20. The communication device of claim 17, wherein the processor is further configured to read program instructions in the memory to perform at least one of:

21. The communication device of claim 20, wherein the processor is further configured to read program instructions in the memory to perform at least one of:

22. The communication device of claim 17, wherein the processor is further configured to read program instructions in the memory to perform at least one of:

23. The communication device of claim 17, wherein if the current state of the relay terminal is that connection with the first device cannot be restored, the processor is further configured to read the program instructions in the memory to perform at least one of:

stopping transmitting data to the first device;

releasing the context of the first device;

and (5) reselecting the relay terminal.

24. The communication device of claim 22, wherein the processor is further configured to read program instructions in the memory to perform the following:

25. A computer readable storage medium, characterized in that it has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of handling link failure according to any of claims 1 to 3; alternatively, the computer program instructions, when executed by a processor, implement the steps of the method of handling link failure according to any of claims 4 to 11.