CN111278158B

CN111278158B - Data processing method, message sending method and relay node

Info

Publication number: CN111278158B
Application number: CN201910075315.5A
Authority: CN
Inventors: 鲍炜; 杨晓东; 金巴·迪·阿达姆·布巴卡
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2022-07-22
Anticipated expiration: 2039-01-25
Also published as: CN111278158A

Abstract

The invention provides a data processing method, a message sending method and a relay node, and relates to the technical field of communication. The data processing method is applied to a first relay node and comprises the following steps: receiving a first notification message sent by a second relay node, wherein the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node; executing target operation according to the first notification message; wherein the target operation comprises one of: stopping sending the uplink data packet to the second relay node; and performing uplink data packet backup and sending an uplink data packet to the second relay node. The scheme can avoid the loss of the data packet as much as possible and ensure the communication reliability.

Description

Data processing method, message sending method and relay node

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data processing method, a message sending method, and a relay node.

Background

In a New Radio (NR), an Integrated Access and Backhaul (IAB) node is introduced. The IAB node may extend the network coverage in a wireless cascade manner.

As shown in fig. 1, a User Equipment (UE, also called a terminal) is connected to a relay node 4(IAB-node4), an IAB-node4 is connected to a relay node 3(IAB-node3) via a wireless backhaul (wireless backhaul), and similarly, the IAB-node3 is connected to the IAB-node1 via a wireless backhaul, and the IAB-node3 is connected to an IAB provider (node) via a wireless backhaul. An IAB donor is a node with a wired backhaul. It is connected with the Core Network (CN) through a wired link.

In fig. 1, two relay nodes having a wireless connection relationship are parent and child nodes. The relay node with the small hop count required to reach the IAB-node is a parent node of another relay node, for example, the IAB-node3 is a parent node of the IAB-node4, and the IAB-node4 is a child node of the IAB-node 3; specifically, IAB-node is the parent node of IAB-node1, and IAB-node1 is the child node of IAB-node.

Because wireless connection is adopted between the IAB-nodes, the link stability is not high. In fig. 1, when Radio Link Failure (RLF) occurs in the Radio Link between IAB-node1 and IAB-node3, IAB-node4 needs to select a new parent node (e.g. relay node 2(IAB-node2)) to connect to the core network.

For uplink packets for the UE, if they have been transmitted to IAB-node3, no more copies of these packets will be retained in IAB-node 4. If IAB-node4 instead selects IAB-node2 as the new parent node, the packet that has been transmitted to IAB-node3 and that IAB-node3 has not yet transmitted to IAB-node1 will be lost.

Disclosure of Invention

The embodiment of the invention provides a data processing method, a message sending method and a relay node, and aims to solve the problems that in the prior art, the relay node cannot transmit an uplink data packet of a terminal to a core network, so that the uplink data packet is lost, and the communication reliability cannot be guaranteed.

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

in a first aspect, an embodiment of the present invention provides a data processing method applied to a first relay node, including:

receiving a first notification message sent by a second relay node, wherein the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node;

executing target operation according to the first notification message;

wherein the target operation comprises one of:

stopping sending the uplink data packet to the second relay node;

and performing uplink data packet backup and sending an uplink data packet to the second relay node.

In a second aspect, an embodiment of the present invention provides a message sending method, which is applied to a second relay node, and includes:

and when a radio link failure occurs between the second relay node and the third relay node or a risk of the radio link failure exists between the second relay node and the third relay node, sending a first notification message to the first relay node.

In a third aspect, an embodiment of the present invention provides a relay node, where the relay node is a first relay node, and the relay node includes:

a first receiving module, configured to receive a first notification message sent by a second relay node, where the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node;

the first execution module is used for executing target operation according to the first notification message;

wherein the target operation comprises one of:

stopping sending the uplink data packet to the second relay node;

and carrying out uplink data packet backup and sending an uplink data packet to the second relay node.

In a fourth aspect, an embodiment of the present invention provides a relay node, where the relay node is a first relay node, and the relay node includes: a memory, a processor 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 data processing method described above.

In a fifth aspect, an embodiment of the present invention provides a relay node, where the relay node is a second relay node, and the relay node includes:

and the first sending module is used for sending a first notification message to the first relay node when a radio link failure occurs between the second relay node and the third relay node or a risk of the radio link failure exists between the second relay node and the third relay node.

In a sixth aspect, an embodiment of the present invention provides a relay node, where the relay node is a second relay node, and the relay node includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program realizing the steps of the above-mentioned message sending method when executed by the processor.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the foregoing data processing method or the steps of the foregoing message sending method.

The invention has the beneficial effects that:

according to the scheme, the uplink data packet is stopped or backed up to be sent to the second relay node according to the first notification message sent by the second relay node, and the uplink data packet is sent to the second relay node, so that the loss of the data packet is avoided as much as possible, and the communication reliability can be ensured.

Drawings

Fig. 1 shows a diagram of a relay network architecture;

fig. 2 shows a schematic diagram of a radio link listening process;

FIG. 3 is a flow diagram illustrating a data processing method according to an embodiment of the invention;

fig. 4 is a flowchart illustrating a message sending method according to an embodiment of the present invention;

fig. 5 is a block diagram of a relay node according to an embodiment of the present invention;

fig. 6 shows one of the structural block diagrams of the relay node according to the embodiment of the present invention;

fig. 7 is a second block diagram of a relay node according to the embodiment of the present invention;

fig. 8 shows a second configuration block diagram of a relay node according to the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In making the description of the embodiments of the present invention, some concepts used in the following description will be explained first.

In Long Term Evolution (LTE) and New Radio (NR) systems, User Equipment (UE, also called a terminal) has a Radio Link Monitor (RLM) function. After determining Radio Link Failure (RLF), the UE performs a corresponding Link recovery procedure.

RLM and RLF may be performed on a primary cell (PCell).

1. RLM and RLF on PCell

In the RLM function of LTE, UE monitors a radio link by measuring a Signal to Interference-plus-Noise Ratio (SINR) of a Cell Reference Signal (CRS) corresponding to a Physical Downlink Control Channel (PDCCH). As shown in fig. 2, when the UE physical layer (L1) measures that the SINR of the CRS corresponding to the PDCCH of the PCell is lower than a certain threshold, the UE determines that the radio link is out-of-synchronization ("out-of-sync"); the physical layer informs the higher layer (Radio Resource Control (RRC) layer, L3) of an out-of-sync indication, and if the RRC layer continues for N310 out-of-sync indications, the UE RRC layer starts a Timer (Timer) T310.

And if the measured CRS corresponding to the PCell PDCCH is higher than a certain threshold, the wireless link synchronization (in-sync) is determined. The physical layer informs a higher layer (RRC layer) of one in-sync indication, and if the RRC layer continues for N311 in-sync indications, the UE stops the operation of the Timer T310.

If Timer T310 runs out of time, the UE judges that the UE Radio Link Fails (RLF); and starts a timer T311, during the operation of T311, the UE will try to find a suitable cell for RRC connection re-establishment. Before the reestablishment is successful, the user plane data transmission and reception between the UE and the network is interrupted.

If the UE is not successfully reestablished before T311 times out, the UE has an RRC CONNECTED (RRC _ CONNECTED) state to an RRC IDLE (RRC _ IDLE) state.

Where the durations of N310, N311, T310 and T311 are network configured.

The RLM and RLF processing flow of NR is similar to that of LTE, as: the names of the counters/timers used may differ and the type of measurement signal may differ. Currently, 3GPP has agreed that the Reference Signal for RLM in NR is different from LTE, and uses a Channel State Information-Reference Signal (CSI-RS) and/or a Synchronization Signal Block (SSB) as the Reference Signal for RLM. SS block and CSI-RS are two reference signals of NR.

The invention provides a data processing method, a message sending method and a relay node, aiming at the problems that in the prior art, the relay node cannot transmit an uplink data packet of a terminal to a core network, the uplink data packet is lost, and the communication reliability cannot be ensured.

As shown in fig. 3, an embodiment of the present invention provides a data processing method applied to a first relay node, including:

step 301, receiving a first notification message sent by a second relay node;

it should be noted that the first notification message is sent when a radio link failure occurs between the second relay node and the third relay node or a risk of a radio link failure exists between the second relay node and the third relay node; the fact that the risk of the occurrence of the radio link failure between the second relay node and the third relay node means that no radio link failure occurs between the second relay node and the third relay node at present, but a preventive measure for coping with the radio link failure needs to be taken.

It should be further noted that, in the embodiment of the present invention, the second relay node is a parent node of the first relay node, that is, the first relay node is a child node of the second relay node; the third relay node is a father node of the second relay node; the third relay node may be a common relay node (i.e., a relay node other than the donor), or the second relay node may also be the donor.

Step 302, according to the first notification message, executing target operation;

it should be noted that the target operation includes one of the following operations:

a11, stopping sending the uplink data packet to the second relay node;

it should be noted that, after the first relay node stops sending the uplink data packet to the second relay node, the uplink data packet continues to be retained in the first relay node, so that the loss of the uplink data packet can be effectively avoided.

A12, backing up the uplink data packet, and sending the uplink data packet to the second relay node;

the operation means that the first relay node performs backup of the uplink data packet before sending the uplink data packet, and after the uplink data packet is sent to the second relay node, the uplink data packet is still retained in the first relay node, so that the uplink data packet can be effectively prevented from being lost.

Specifically, the first notification message includes at least one of the following:

a21, message type indication information;

it should be noted that the message type indication information is used to indicate that a radio link failure occurs between the second relay node and a third relay node or a risk of a radio link failure exists between the second relay node and the third relay node;

a22, identification information of the second relay node;

a23, a reason that a radio link failure occurs between the second relay node and the third relay node, or a reason that a risk of a radio link failure exists between the second relay node and the third relay node;

it should be further noted that the reason for the radio link failure between the second relay node and the third relay node includes at least one of the following:

a231, overtime a first timer;

it should be noted that, optionally, the first timer in the embodiment of the present invention refers to a T310 timer; alternatively, the first timer may be a timer other than the T310 timer.

For example, when T310 times out, it indicates that a radio link failure occurs between the second relay node and the third relay node.

A232, in the random access process, when the lead code sending times reach a first preset maximum time, the random access still fails;

that is, when the number of preamble transmissions reaches the first preset maximum number (for example, M1), and the random access still fails, it indicates that a radio link failure occurs between the second relay node and the third relay node.

A233, at least one Radio Link Control (RLC) confirms that the retransmission times of the mode Protocol Data Unit (PDU) reach the second preset maximum times, and the PDU is not successfully received;

for example, a certain RLC acknowledged mode PDU is retransmitted for a second predetermined maximum number of times (e.g., N1 times), and is not successfully received; or the retransmission times of some RLC acknowledged mode PDUs reach a second preset maximum time and are not successfully received;

that is, when the number of retransmissions of at least one RLC acknowledged mode PDU reaches a second predetermined maximum number (e.g., N1), and is not successfully received, it indicates that a radio link failure occurs between the second relay node and the third relay node.

It should be further noted that the reason why there is a risk of radio link failure between the second relay node and the third relay node includes at least one of the following:

a234, starting a first timer;

For example, when T310 starts, it indicates that there is a risk of radio link failure occurring between the second relay node and the third relay node, i.e. a precaution measure against the radio link failure needs to be taken.

A235, in the random access process, the lead code sending times reach a first preset time, and the random access is still unsuccessful;

that is, when the number of preamble transmissions reaches a first predetermined number (e.g., M2 times and M2 is smaller than M1), the random access is still unsuccessful, which indicates that there is a risk of radio link failure between the second relay node and the third relay node, i.e., a precautionary measure against the radio link failure needs to be taken.

A236, at least one RLC confirms that the number of times of PDU retransmission reaches a second preset number of times and the PDU is not successfully received;

for example, a RLC acknowledged mode PDU is retransmitted for a second predetermined number of times (e.g., N2 times, where N2 is less than N1), and has not been successfully received; or several RLC ack PDU retransmissions reach a second predetermined number (e.g., N2, N2 is less than N1), and are not successfully received;

that is, when the number of retransmissions of at least one RLC acknowledged mode PDU reaches a second predetermined number (e.g., N2, and N2 is less than N1), and the RLC acknowledged mode PDU is not successfully received, it indicates that there is a risk of radio link failure between the second relay node and the third relay node, i.e., a precautionary measure against the radio link failure needs to be taken.

A24, stopping the instruction information of the sending of the uplink data packet;

a25, instruction information for backing up the uplink data packet;

it should be noted that a24 and a25 can only exist in the first notification message alternatively, that is, when a24 is included in the first notification message, a25 is not included; or when a25 is included in the first notification message, a24 is not included any more.

It should be further noted that, after the radio link failure occurs between the second relay node and the third relay node, the second relay node loses connection with the core network node, and after that, the second relay node may reestablish connection with the core network node, so that when the first notification message is sent when the radio link failure occurs between the second relay node and the third relay node, after the step 302, the method further includes:

and receiving a second notification message sent by the second relay node, wherein the second notification message is sent after the connection between the second relay node and the core network node is established.

Specifically, the connection between the second relay node and the core network node may be established in one of the following manners:

a31, wireless link recovery between the second relay node and the third relay node;

this situation means that the second relay node reestablishes a wireless link connection with its parent node; for example, as shown in fig. 1, after the relay node3 and the relay node1 have a radio link failure, the relay node1 establishes a radio link connection again.

A34, establishing wireless link connection between the second relay node and a fourth relay node;

this situation means that the second relay node establishes a wireless link connection with the new parent node; for example, as shown in fig. 1, after a radio link failure occurs between the relay node3 and the relay node1, a radio link connection is established with the relay node 2.

It should be further noted that the second notification message may further include at least one of the following:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

Further, it should be noted that, when the first relay node learns that the connection between the second relay node and the core network node is established, it indicates that the second relay node may continue to receive the uplink data packet, so that, when the first relay node stops sending the uplink data packet to the second relay node, the first relay node should send the uplink data packet to the second relay node according to the second notification message after receiving the second notification message sent by the second relay node; when the first relay node performs uplink data packet backup and sends an uplink data packet to the second relay node, after receiving the second notification message sent by the second relay node, the first relay node should also stop data packet backup according to the second notification message, and continue sending the uplink data packet to the second relay node.

It should be further noted that, when the first relay node learns that the wireless link between the second relay node and the third relay node fails, the first relay node may re-search for a new parent node and establish a wireless link connection with the new parent node, so that, in a case that the first notification message is sent when the wireless link between the second relay node and the third relay node fails, and the target is operated to perform uplink packet backup and send an uplink packet to the second relay node, the data processing method according to the embodiment of the present invention may further include:

disconnecting the second relay node, stopping data packet backup and stopping sending uplink data packets to the second relay node; establishing a wireless link connection with a fifth relay node; after establishing connection with the fifth relay node, sending a first uplink data packet to the fifth relay node;

wherein the first uplink data packet includes: the backup uplink data packet and the data packet which is not transmitted.

It should be noted that the fifth relay node may be a normal relay node (i.e., a relay node other than the donor), or the fifth relay node may also be the donor.

It should be noted that, after the first relay node finds a new parent node, because the first relay node is still sending the backed-up uplink packet to the second relay node at this time, the first relay node needs to disconnect the connection with the second relay node first, stop the packet backup and stop sending the uplink packet to the second relay node, then establish a wireless link connection with the new parent node, and then send the backed-up uplink packet and the packet that is not transmitted to the new parent node together, for example, as shown in fig. 1, when the relay node3 fails in wireless link with the relay node1, the relay node4 finds a new parent node relay node2 at the relay node4, the relay node4 disconnects the connection with the relay node3 first, stops the packet backup and stops sending the uplink packet to the relay node3, then establishes a wireless link connection with the relay node2, and then the backed up uplink data packet and the data packet which is not transmitted are sent to the relay node2 together.

It should be further noted that, before the first relay node disconnects from the second relay node, stops the backup of the data packet, and stops sending the uplink data packet to the second relay node, the data processing method further includes: after receiving the first notification message, starting a second timer; and after the second timer is overtime, disconnecting the second relay node, stopping data packet backup and sending an uplink data packet to the second relay node.

That is, after the first relay node of the terminal receives the first notification message, the first relay node does not immediately disconnect the connection with the second relay node, but after the second timer is overtime, the first relay node disconnects the connection with the second relay node to stop the backup of the data packet and stop sending the uplink data packet to the second relay node.

It should be noted that, after the second relay node learns that there is a risk of radio link failure between the second relay node and the third relay node, in the subsequent communication process, the second relay node learns that there is a risk of radio link failure between the second relay node and the third relay node to be eliminated, that is, there is no need to take a precautionary measure against the radio link failure, at this time, when there is no risk of radio link failure between the second relay node and the third relay node, the second relay node sends a third notification message to the first relay node, and when the target operation executed by the first relay node is to perform uplink packet backup and send an uplink packet to the second relay node, after receiving the third notification message sent by the second relay node, according to the third notification message, the operation of stopping uplink packet backup is executed, and the uplink packet to be backed up is deleted, and sending a second uplink data packet to the second relay node;

wherein the second uplink data packet includes: packets that are not transmitted.

It is further noted that the third notification message includes at least one of the following:

a41, identification information of the second relay node;

and A42, instruction information for stopping backup of the uplink data packet.

For example, as shown in fig. 1, when the risk of a potential radio link failure occurring between the relay node3 and the relay node1 is eliminated, the relay node3 sends a third notification message to the relay node4, and after receiving the third notification message, the relay node4 performs an operation of stopping uplink packet backup, deletes the uplink packet for backup, and sends the uplink packet to the relay node 3.

According to the embodiment of the invention, the uplink data packet is stopped or backed up to be sent to the second relay node according to the first notification message sent by the second relay node, and the uplink data packet is sent to the second relay node, so that the loss of the data packet is avoided as much as possible, and the communication reliability can be ensured.

As shown in fig. 4, an embodiment of the present invention further provides a message sending method, which is applied to a second relay node, and includes:

step 401, when a radio link failure occurs between the second relay node and the third relay node or a risk of a radio link failure exists between the second relay node and the third relay node, sending a first notification message to the first relay node.

It should be noted that the risk of the radio link failure occurring between the second relay node and the third relay node means that no radio link failure occurs between the second relay node and the third relay node, but a precautionary measure for dealing with the radio link failure needs to be taken.

Specifically, the first notification message includes at least one of:

b11, message type indication information;

b12, identification information of the second relay node;

b13, a reason why a radio link failure occurs between the second relay node and the third relay node, or a reason why there is a risk of a radio link failure between the second relay node and the third relay node;

b14, instruction information for stopping sending the uplink data packet;

and B15, instruction information for backing up the uplink data packet.

Further, the reason for the radio link failure between the second relay node and the third relay node includes at least one of:

b21, the first timer times out;

b22, in the random access process, the lead code sending times reach a first preset maximum times, and the random access still fails;

b23, the at least one radio link control RLC acknowledged mode protocol data unit PDU retransmission times reaches a second preset maximum number of times and is not successfully received.

Further, the reason for the risk of radio link failure between the second relay node and the third relay node includes at least one of:

b31, starting a first timer;

b32, in the random access process, the lead code sending times reach a first preset time, and the random access is still unsuccessful;

b33, at least one Radio Link Control (RLC) confirms that the number of times of retransmission of the mode Protocol Data Unit (PDU) reaches a second preset number, and the PDU is not successfully received.

For descriptions of B11-B15, B21-B23, and B31-B33, reference may be made to descriptions in a21-a25 in the foregoing embodiments, and no further description is provided herein.

Optionally, when a radio link failure occurs between the second relay node and the third relay node, after the sending the first notification message to the first relay node, the method further includes:

and after the connection is established between the second relay node and the core network node, sending a second notification message to the first relay node.

Specifically, the second notification message may include one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

Further, the establishing of the connection between the second relay node and the core network node includes one of the following:

a wireless link between the second relay node and the third relay node is restored;

and establishing wireless link connection between the second relay node and a fourth relay node.

Optionally, before the sending the first notification message to the first relay node, the method further includes:

if the first condition is met, determining that the risk of radio link failure exists between the second relay node and a third relay node;

wherein the first condition comprises one of:

b41, starting a first timer;

For example, when T310 starts, it indicates that there is a risk of radio link failure between the second relay node and the third relay node.

B42, the continuous out-of-step times reach a third preset time;

when the number of continuous out-of-synchronization reaches a third preset number (namely a preset number threshold), it indicates that a risk of radio link failure occurs between the second relay node and the third relay node.

B43, in the random access process, the lead code sending times reach a first preset time, and the random access is unsuccessful;

that is, if the number of times of sending the preamble reaches the first preset number (the first preset number should be smaller than the preset maximum number of times of sending the preamble), the random access is still unsuccessful, which indicates that there is a risk of radio link failure between the second relay node and the third relay node.

B44, at least one radio link control RLC affirms the mode agreement data unit PDU retransmission times to reach the second preset times, still not successfully received;

for example, the number of retransmissions of a certain RLC acknowledged mode PDU reaches a second predetermined number (the second predetermined number should be less than the number of retransmissions of the RLC acknowledged mode PDU and reach a predetermined maximum number), and the PDU is not successfully received; or the retransmission times of some RLC acknowledged mode PDUs reach a second preset time and are not successfully received;

that is, when the number of retransmissions of at least one RLC acknowledged mode PDU reaches the second preset number and is not successfully received, it indicates that there is a risk of radio link failure between the second relay node and the third relay node.

Optionally, when there is a risk of radio link failure between the second relay node and the third relay node, after the sending the first notification message to the first relay node, the method further includes:

and when the risk of wireless link failure does not exist between the second relay node and the third relay node, sending a third notification message to the first relay node.

Specifically, the manner for acquiring that there is no risk of radio link failure between the second relay node and the third relay node includes one of:

b51, the first timer is stopped;

it should be noted that, optionally, the first timer in the embodiment of the present invention refers to a T310 timer; alternatively, the first timer may be other timers besides the T310 timer.

For example, when T310 is stopped, there is no risk of radio link failure occurring between the second relay node and the third relay node, that is, no precaution measures against radio link failure need to be taken.

B52, the number of times of continuously receiving synchronous instructions reaches a fourth preset number of times;

when the number of times of continuously receiving the synchronization reaches a fourth preset number (namely, a preset number threshold), it indicates that there is no risk of radio link failure between the second relay node and the third relay node, that is, no precautionary measure for the radio link failure is required.

B53, triggering the random access process of the first notification message, wherein the random access is successful;

that is, when the random access procedure triggering the first notification message is finally successfully accessed in the access attempt procedure, there is no risk of radio link failure between the second relay node and the third relay node, that is, no precautionary measure for the radio link failure needs to be taken.

B54, after all RLC affirmed mode PDU retransmission triggering the first notice message, successfully received;

that is, when the RLC ack PDU is successfully received after retransmission, there is no risk of radio link failure between the second relay node and the third relay node, that is, no precautionary measure for the radio link failure needs to be taken.

Further, the third notification message includes at least one of:

b61, identification information of the second relay node;

b62, instruction information for stopping backup of upstream data packets.

It should be noted that all the descriptions about the second relay node in the above embodiments are applied to the embodiment of the message sending method, and the same technical effects can be achieved.

As shown in fig. 5, an embodiment of the present invention provides a relay node 500, where the relay node 500 is a first relay node, and includes:

a first receiving module 501, configured to receive a first notification message sent by a second relay node, where the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node;

a first executing module 502, configured to execute a target operation according to the first notification message;

wherein the target operation comprises one of:

stopping sending the uplink data packet to the second relay node;

message type indication information, wherein the message type indication information is used for indicating that a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node;

identification information of the second relay node;

a reason that a radio link failure occurs between the second relay node and the third relay node, or a reason that a risk of a radio link failure exists between the second relay node and the third relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

the first timer times out;

in the random access process, the lead code sending times reach a first preset maximum time, and the random access still fails;

at least one Radio Link Control (RLC) confirms that the number of times of retransmission of the Protocol Data Unit (PDU) reaches a second preset maximum number of times and is not successfully received.

starting a first timer;

in the random access process, the sending times of the lead codes reach a first preset time, and the random access is still unsuccessful;

at least one Radio Link Control (RLC) confirms that the number of times of retransmission of the Protocol Data Unit (PDU) reaches a second preset number of times and the PDU is not successfully received.

Optionally, when the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node, after the first executing module 502 executes a target operation according to the first notification message, the method further includes:

a second receiving module, configured to receive a second notification message sent by the second relay node, where the second notification message is sent after a connection is established between the second relay node and a core network node.

Optionally, the second notification message comprises at least one of:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

Optionally, when the target operation is to stop sending the uplink data packet to the second relay node, after the second receiving module receives the second notification message sent by the second relay node, the method further includes:

and the second sending module is used for sending the uplink data packet to the second relay node according to the second notification message.

Optionally, when the target operation is to perform uplink packet backup and send an uplink packet to the second relay node, after the second receiving module receives a second notification message sent by the second relay node, the method further includes:

and the second execution module is used for stopping data packet backup and sending an uplink data packet to the second relay node according to the second notification message.

Further, the connection between the second relay node and the core network node is established, and includes one of the following:

Optionally, when the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node, and the target operation is to perform uplink packet backup, and send an uplink packet to the second relay node, after the first executing module 502 executes the target operation according to the first notification message, the method further includes:

the third execution module is used for disconnecting the connection with the second relay node, stopping data packet backup and stopping sending an uplink data packet to the second relay node;

the connection establishing module is used for establishing wireless link connection with the fifth relay node;

a third sending module, configured to send a first uplink data packet to the fifth relay node after establishing connection with the fifth relay node;

Further, before the third executing module disconnects the connection with the second relay node, stops the backup of the data packet, and stops sending the uplink data packet to the second relay node, the method further includes:

the starting module is used for starting a second timer after receiving the first notification message;

and after the second timer is overtime, the third execution module disconnects the second relay node, stops data packet backup and stops sending uplink data packets to the second relay node.

Optionally, the first notification message is sent when there is a risk of radio link failure between the second relay node and a third relay node, and the target operation is to perform uplink packet backup and send an uplink packet to the second relay node, and after the first executing module 502 executes the target operation according to the first notification message, the method further includes:

a third receiving module, configured to receive a third notification message sent by the second relay node, where the third notification message is sent when there is no risk of radio link failure between the second relay node and a third relay node;

and the fourth execution module is used for executing the operation of stopping the backup of the uplink data packet according to the third notification message and deleting the uplink data packet for backup.

Further, the third notification message includes at least one of:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

It should be noted that, the terminal embodiment is a first relay node corresponding to the data processing method applied to the first relay node, and all implementation manners of the foregoing embodiments are applied to the first relay node embodiment, and the same technical effects as those can be achieved.

An embodiment of the present invention further provides a relay node, where the relay node is a first relay node, and the relay node includes: the data processing method applied to the first relay node includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the computer program is executed by the processor to implement the processes in the data processing method embodiment applied to the first relay node, and the same technical effects can be achieved, and are not described herein again to avoid repetition.

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 a processor, the computer program implements each process in the data processing method embodiment applied to the first relay node, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 6 is a structural diagram of a relay node according to an embodiment of the present invention, which can implement details of the data processing method described above and achieve the same effect. As shown in fig. 6, the relay node 600 includes: a processor 601, a transceiver 602, a memory 603, and a bus interface, wherein:

the processor 601, configured to read the program in the memory 603, executes the following processes:

receiving, by a transceiver 602, a first notification message sent by a second relay node, where the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node or a risk of a radio link failure exists between the second relay node and the third relay node;

executing target operation according to the first notification message;

wherein the target operation comprises one of:

stopping sending the uplink data packet to the second relay node;

In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, in particular, one or more processors, represented by processor 601, and memory, represented by memory 603. 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 herein. The bus interface provides an interface. The transceiver 602 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.

identification information of the second relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

the first timer times out;

starting a first timer;

in the random access process, the lead code sending times reach a first preset time, and the random access is still unsuccessful;

Optionally, when the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node, after the target operation is executed according to the first notification message, the processor 601 is configured to read a program in the memory 603, and further execute the following process:

and receiving, by the transceiver 602, a second notification message sent by the second relay node, where the second notification message is sent after a connection is established between the second relay node and a core network node.

Optionally, the second notification message comprises at least one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

Further, when the target operation is to stop sending the uplink data packet to the second relay node, after the receiving the second notification message sent by the second relay node, the processor 601 is configured to read the program in the memory 603, and further perform the following process:

and sending an uplink data packet to the second relay node through the transceiver 602 according to the second notification message.

Further, when the target operation is to perform uplink packet backup and send an uplink packet to the second relay node, after receiving the second notification message sent by the second relay node, the processor 601 is configured to read the program in the memory 603, and further perform the following processes:

and stopping data packet backup according to the second notification message, and sending an uplink data packet to the second relay node through the transceiver 602.

Optionally, when the first notification message is sent when a radio link failure occurs between the second relay node and a third relay node, and the target operation performs uplink packet backup, and sends an uplink packet to the second relay node, after the target operation is executed according to the first notification message, the processor 601 is configured to read a program in the memory 603, and further execute the following process:

disconnecting the connection with the second relay node, stopping data packet backup and stopping sending uplink data packets to the second relay node;

establishing a wireless link connection with a fifth relay node;

after establishing a connection with the fifth relay node, sending a first uplink data packet to the fifth relay node through a transceiver 602;

wherein, the first uplink data packet includes: backup upstream packets and packets not transmitted.

Optionally, before the connection with the second relay node is disconnected, the backup of the data packet is stopped, and the sending of the uplink data packet to the second relay node is stopped, the processor 601 is configured to read the program in the memory 603, and further perform the following processes:

after receiving the first notification message, starting a second timer;

and after the second timer is overtime, disconnecting the second relay node, stopping data packet backup and sending an uplink data packet to the second relay node.

Optionally, the first notification message is sent when there is a risk of radio link failure between the second relay node and a third relay node, the target operation is to perform uplink packet backup, and send an uplink packet to the second relay node, and after the target operation is executed according to the first notification message, the processor 601 is configured to read a program in the memory 603, and execute the following process:

receiving, by a transceiver 602, a third notification message sent by the second relay node, where the third notification message is sent when there is no risk of radio link failure between the second relay node and a third relay node;

and executing the operation of stopping the backup of the uplink data packet according to the third notification message, and deleting the uplink data packet for backup.

Specifically, the third notification message includes at least one of the following:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

As shown in fig. 7, an embodiment of the present invention provides a relay node 700, where the relay node 700 is a second relay node, and includes:

a first sending module 701, configured to send a first notification message to the first relay node when a radio link failure occurs between the second relay node and the third relay node or there is a risk of a radio link failure with the third relay node.

the message type indication information is used for indicating that a radio link failure occurs between the second relay node and a third relay node or a risk of the radio link failure exists between the second relay node and the third relay node;

identification information of the second relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

the first timer times out;

at least one radio link control, RLC, acknowledges that the number of retransmissions of a mode protocol data unit, PDU, reaches a second preset maximum number of times and has not been successfully received.

starting a first timer;

Optionally, when a radio link failure occurs between the second relay node and a third relay node, after the first sending module 701 sends the first notification message to the first relay node, the method further includes:

and a fourth sending module, configured to send a second notification message to the first relay node after the connection is established between the second relay node and the core network node.

Specifically, the second notification message includes at least one of:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

Optionally, before the first sending module 701 sends the first notification message to the first relay node, the method further includes:

a determining module, configured to determine that a risk of a radio link failure exists between the second relay node and a third relay node if a first condition is satisfied;

wherein the first condition comprises one of:

starting a first timer;

the continuous step loss times reach a third preset time;

in the random access process, the sending times of the lead codes reach a first preset time, and the random access is unsuccessful;

Optionally, when there is a risk of radio link failure between the second relay node and the third relay node, after the first sending module 701 sends the first notification message to the first relay node, the method further includes:

a fifth sending module, configured to send a third notification message to the first relay node when there is no risk of a radio link failure between the second relay node and the third relay node.

Further, if a second condition is satisfied, there is no risk of radio link failure between the second relay node and a third relay node, where the second condition includes one of:

the first timer is stopped;

the number of times of continuously receiving the synchronous indication reaches a fourth preset number of times;

triggering a random access process of the first notification message, wherein the random access is successful;

all radio link control, RLC, triggering the first notification message is successfully received after acknowledging the mode protocol data unit, PDU, retransmission.

Further, the third notification message includes at least one of:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

It should be noted that, the terminal embodiment is a second relay node corresponding to the message sending method applied to the second relay node, and all implementation manners of the above embodiments are applied to the second relay node embodiment, and the same technical effects as those of the second relay node embodiment can also be achieved.

An embodiment of the present invention further provides a relay node, where the relay node is a second relay node, and the relay node includes: the second relay node is configured to perform the above-mentioned processes in the message sending method embodiment applied to the second relay node when the computer program is executed by the processor, and the same technical effect can be achieved.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process in the above-described embodiment of a message sending method applied to a second relay node, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 8 is a structural diagram of a relay node according to an embodiment of the present invention, which can implement details of the message sending method described above and achieve the same effects. As shown in fig. 8, the relay node 800 includes: a processor 801, a transceiver 802, a memory 803, and a bus interface, wherein:

a processor 801 for reading the program in the memory 803 and executing the following processes:

when a radio link failure occurs between the second relay node and the third relay node or there is a risk of a radio link failure with the third relay node, a first notification message is sent to the first relay node through the transceiver 802.

In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by a processor 801 and various circuits represented by a memory 803 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 herein. The bus interface provides an interface. The transceiver 802 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.

identification information of the second relay node;

a cause of a radio link failure occurring between the second relay node and the third relay node, or a cause of a risk of a radio link failure existing between the second relay node and the third relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

the first timer times out;

starting a first timer;

Optionally, when a radio link failure occurs between the second relay node and the third relay node, after the sending of the first notification message to the first relay node, the processor 801 is configured to read the program in the memory 803, and further perform the following process:

after the connection between the second relay node and the core network node is established, a second notification message is sent to the first relay node through the transceiver 802.

Specifically, the second notification message includes at least one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

Optionally, there is a risk of radio link failure between the second relay node and the third relay node, before the sending the first notification message to the first relay node, the processor 801 is configured to read the program in the memory 803, and further perform the following process:

wherein the first condition comprises one of:

starting a first timer;

the continuous step loss times reach a third preset time;

Optionally, when there is a risk of radio link failure between the second relay node and the third relay node, after the sending of the first notification message to the first relay node, the processor 801 is configured to read a program in the memory 803, and perform the following process:

the first timer is stopped;

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A data processing method is applied to a first relay node, and is characterized by comprising the following steps:

receiving a first notification message sent by a second relay node, wherein the first notification message is sent when a risk of radio link failure exists between the second relay node and a third relay node;

executing target operation according to the first notification message;

wherein the target operation comprises:

performing uplink data packet backup and sending an uplink data packet to the second relay node;

and when receiving a notification message of the occurrence of the wireless link failure between the second relay node and the third relay node, which is sent by the second relay node, stopping sending the uplink data packet to the second relay node, and after establishing the wireless link connection with the new father node, sending the backup uplink data and the unsent uplink data to the new father node.

2. The data processing method of claim 1, wherein the first notification message comprises at least one of:

message type indication information, wherein the message type indication information is used for indicating that a risk of radio link failure exists between the second relay node and the third relay node;

identification information of the second relay node;

a cause of risk of radio link failure between the second relay node and the third relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

3. The data processing method of claim 2, wherein the reason for the radio link failure between the second relay node and the third relay node comprises at least one of:

the first timer times out;

4. The data processing method of claim 2, wherein the reason for the risk of radio link failure between the second relay node and the third relay node comprises at least one of:

starting a first timer;

5. The data processing method of claim 1, wherein after stopping sending the uplink data packet to the second relay node when receiving a notification message sent by the second relay node that a radio link failure occurs between the second relay node and a third relay node, the method further comprises:

6. The data processing method of claim 5, wherein the second notification message comprises at least one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

7. The data processing method according to claim 5, wherein when the target operation is to stop sending the uplink packet to the second relay node, after the receiving the second notification message sent by the second relay node, the method further comprises:

and sending an uplink data packet to the second relay node according to the second notification message.

8. The data processing method according to claim 5 or 6, wherein when the target operation is performing backup of an uplink data packet and sending the uplink data packet to the second relay node, after the receiving a second notification message sent by the second relay node, the method further comprises:

and stopping data packet backup according to the second notification message, and sending an uplink data packet to the second relay node.

9. The data processing method of claim 5, wherein establishing a connection between the second relay node and a core network node comprises one of:

10. The data processing method according to claim 1, wherein the first notification message is sent when there is a risk of radio link failure between the second relay node and a third relay node, the target operation is to perform uplink packet backup and send an uplink packet to the second relay node, and after the target operation is executed according to the first notification message, the method further comprises:

receiving a third notification message sent by the second relay node, wherein the third notification message is sent when no risk of radio link failure exists between the second relay node and a third relay node;

11. The data processing method of claim 10, wherein the third notification message comprises at least one of:

identification information of the second relay node;

and indication information for stopping backup of the uplink data packet.

12. A message sending method is applied to a second relay node and is characterized by comprising the following steps:

when the risk of wireless link failure exists between the second relay node and the third relay node, a first notification message is sent to the first relay node;

the first notification message enables the first relay terminal to perform uplink data packet backup and send an uplink data packet to the second relay node;

when a wireless link failure occurs between the second relay node and a third relay node, sending a notification message of the wireless link failure occurring between the second relay node and the third relay node to the first relay node, wherein the notification message of the wireless link failure occurring between the second relay node and the third relay node is used for enabling the first relay node to stop sending an uplink data packet to the second relay node, and sending backup uplink data and unsent uplink data to a new father node after establishing wireless link connection with the new father node.

13. The method according to claim 12, wherein the first notification message comprises at least one of:

identification information of the second relay node;

a reason for the risk of radio link failure between the second relay node and the third relay node;

stopping the indication information sent by the uplink data packet;

and carrying out indication information of uplink data packet backup.

14. The method according to claim 13, wherein the reason for the radio link failure between the second relay node and the third relay node comprises at least one of:

the first timer times out;

15. The method according to claim 13, wherein the reason for the risk of radio link failure between the second relay node and the third relay node includes at least one of:

starting a first timer;

16. The message sending method according to claim 12, wherein after sending a notification message of the occurrence of the radio link failure between the second relay node and the third relay node to the first relay node when the radio link failure occurs between the second relay node and the third relay node, the method further comprises:

and after the connection between the second relay node and the core network node is established, sending a second notification message to the first relay node.

17. The method according to claim 16, wherein the second notification message comprises at least one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

18. The message transmission method according to claim 16, wherein the establishing of the connection between the second relay node and the core network node comprises one of:

19. The method according to claim 12, wherein there is a risk of radio link failure between the second relay node and the third relay node, and before the sending the first notification message to the first relay node, the method further comprises:

wherein the first condition comprises one of:

starting a first timer;

the continuous step-out times reach a third preset time;

in the random access process, the lead code sending times reach a first preset time, and the random access is unsuccessful;

20. The message sending method according to claim 12, wherein when there is a risk of radio link failure between the second relay node and the third relay node, after the sending the first notification message to the first relay node, further comprising:

and when the risk of radio link failure does not exist between the second relay node and the third relay node, sending a third notification message to the first relay node.

21. The method according to claim 20, wherein if a second condition is satisfied, there is no risk of radio link failure between the second relay node and a third relay node, and the second condition includes one of:

the first timer is stopped;

22. The method of claim 20, wherein the third notification message comprises at least one of:

identification information of the second relay node;

and stopping the backup of the uplink data packet.

23. A relay node, which is a first relay node, comprising:

a first receiving module, configured to receive a first notification message sent by a second relay node, where the first notification message is sent when a risk of a radio link failure exists between the second relay node and a third relay node;

the first execution module is used for executing target operation according to the first notification message; and

when a notification message of wireless link failure between a second relay node and a third relay node, which is sent by the second relay node, is received, sending of an uplink data packet to the second relay node is stopped, and after wireless link connection with a new father node is established, backup uplink data and unsent uplink data are sent to the new father node;

wherein the target operation comprises:

24. A relay node, which is a first relay node, comprising: memory, processor and 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 data processing method according to any one of claims 1 to 11.

25. A relay node, which is a second relay node, comprising:

a first sending module, configured to send a first notification message to a first relay node when a risk of radio link failure exists between the second relay node and a third relay node; and

when a wireless link failure occurs between the second relay node and a third relay node, sending a notification message of the wireless link failure occurring between the second relay node and the third relay node to the first relay node, wherein the notification message of the wireless link failure occurring between the second relay node and the third relay node is used for enabling the first relay node to stop sending an uplink data packet to the second relay node, and sending backup uplink data and unsent uplink data to a new father node after establishing wireless link connection with the new father node;

and the first notification message enables the first relay terminal to perform uplink data packet backup and send an uplink data packet to the second relay node.

26. A relay node, which is a second relay node, comprising: memory, processor and 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 message sending method according to any one of claims 12 to 22.

27. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the data processing method of one of claims 1 to 11 or the steps of the message sending method of one of claims 12 to 22.