WO2023130982A1

WO2023130982A1 - Method and apparatus for giving notification of radio link state between nodes

Info

Publication number: WO2023130982A1
Application number: PCT/CN2022/141257
Authority: WO
Inventors: 谌丽
Original assignee: 大唐移动通信设备有限公司
Priority date: 2022-01-06
Filing date: 2022-12-23
Publication date: 2023-07-13
Also published as: CN116456374A

Abstract

Provided in the embodiments of the present disclosure are a method and apparatus for giving notification of a radio link state between nodes. The method, which is applied to an IAB node, comprises: when the recovery of a wireless link failure of an IAB node is made, determining whether a mother node connected to the IAB node can route a data packet of a child node of the IAB node; and determining, on the basis of determination result information, whether to send radio link state information to the child node. In the method for giving notification of a radio link state between nodes provided in the embodiments of the present disclosure, according to whether a mother node connected to an IAB node can route a data packet of a child node, whether to send radio link state information to the child node is determined, such that the child node can acquire topological information in a timely manner, so as to perform real-time topology adjustment, thereby solving the possible problem of it not being possible to transmit data of the child node.

Description

Method and device for notifying wireless link status between nodes

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202210011324.X filed on January 06, 2022, and the title of the invention is "A Method and Device for Notifying the Status of a Wireless Link Between Nodes", which is incorporated by reference in its entirety Incorporated into this article.

technical field

The present disclosure relates to the technical field of wireless communication, and in particular to a method and device for notifying the state of a wireless link between nodes.

Background technique

In the existing mechanism, after the Integrated Access and Backhaul (IAB) node sends a BH wireless link failure detection indication (BHRLF detection indication) to the child node of the IAB node, if the wireless link of the IAB node If it recovers, it sends a BH wireless link recovery indication to the child node. There is a risk in this mechanism. If the IAB node is rebuilt to an IAB node or IAB donor that cannot support its child nodes, the IAB node will send a wireless link recovery message to its child nodes after the wireless link is restored, which will not only fail to restore the normal status of the child nodes. Data transmission, on the contrary, will delay the time when the child node finds the abnormality.

Contents of the invention

Aiming at the problems existing in the prior art, the embodiments of the present disclosure provide a method and device for notifying the state of a wireless link between nodes.

In the first aspect, an embodiment of the present disclosure provides a method for notifying the status of a wireless link between nodes, which is applied to an integrated access and backhaul IAB node, including:

In the case that the IAB node wireless link fails to recover, determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Based on the determined result information, determine whether to send wireless link state information to the child node.

Optionally, according to the method for notifying the wireless link status between nodes according to an embodiment of the present disclosure, the determining whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node includes:

In the case of meeting any of the following conditions, it is determined that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node; the conditions include:

The IAB node is rebuilt to the original mother IAB node before the wireless link failure occurs;

The IAB node is rebuilt to the parent IAB node of the same central control node distributed unit IAB donor DU as the original parent IAB node;

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donor DU, and the IAB node can perform cross-IAB donor DU data packets from the child nodes rerouting;

The IAB node is rebuilt to the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can re-route the data packets from the child nodes across the IAB donor CU;

The IAB node is rebuilt to the IAB donor DU accessed by the original mother IAB node;

The IAB node is rebuilt to a different IAB donor DU of the same central control node central unit IAB donor CU as the original mother IAB node, and the IAB node can reroute data packets from the child nodes across the IAB donor DU;

The IAB node is rebuilt to the IAB donor DU under the IAB donor CU of the central control node different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU.

Optionally, according to the method for notifying the state of the wireless link between nodes according to an embodiment of the present disclosure, when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node In some cases, the determining whether to send wireless link state information to the child node based on the determined result information includes any of the following:

Sending a wireless link failure recovery indication message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.

Optionally, according to the method for notifying the state of the wireless link between nodes according to an embodiment of the present disclosure, the method further includes:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, send a wireless link failure recovery indication message to the child node; or

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, the wireless link failure recovery instruction message is not sent to the child node.

Optionally, according to the method for notifying the state of the wireless link between nodes according to an embodiment of the present disclosure, in the case of obtaining the route reconfiguration information sent by the central control node IAB donor, sending the route to the child node Reconfiguration information, including:

When the IAB node is rebuilt to the IAB donor DU accessed by the original parent IAB node, the IAB donor DU different from the original parent IAB node, and other parent IAB nodes different from the original parent IAB node, the IAB The node waits for the routing reconfiguration information sent by the IAB donor;

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, sending a wireless link failure recovery failure indication message to the child node; or

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, no message is sent to said child node; or

In the case that the IAB node is rebuilt to other IAB donor DUs of the same IAB donor CU as the original parent IAB node or an IAB donor DU under other IAB donor CUs, send a wireless link failure recovery failure indication message to the child node; or

When the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU, no message is sent to the child node.

In the case where the IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donor DU, and the IAB node is capable of rerouting across IAB donor DUs, the The IAB node performs inter donor DU rerouting on data packets from child nodes;

When the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node performs data packets from the child node inter donor CU rerouting;

The IAB node is rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor DU In the case of , the IAB node performs inter donor DU rerouting on the data packet from the child node;

The IAB node is rebuilt to the IAB donor DU under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU In the case of , the IAB node performs inter donor CU rerouting on the data packet from the child node.

Optionally, according to the method for notifying the wireless link status between nodes according to an embodiment of the present disclosure, the determined result information is that the parent node connected to the IAB node cannot route the data packets of the child nodes of the IAB node In the case of , the determining whether to send wireless link state information to the child node based on the result information includes any of the following:

Sending a radio link failure recovery failure indication message to the child node;

not send any message to said child node;

Start the first wireless link failure recovery waiting timer, determine that the first wireless link failure recovery waiting timer expires, send a wireless link failure recovery failure indication message to the child node, or start the first wireless link failure Resume the waiting timer without sending any message to the child node;

Optionally, according to the method for notifying the wireless link status between nodes according to an embodiment of the present disclosure, the parameter of the first wireless link failure recovery waiting timer is the default value specified in the protocol or the original parent IAB node accessed Configured by IAB donor.

In the second aspect, an embodiment of the present disclosure provides a method for notifying the state of a wireless link between nodes, which is applied to a child node of an integrated access and backhaul IAB node, including:

After receiving the wireless link failure detection instruction message sent by the IAB node, receiving the wireless link status information sent by the IAB node, and determining whether to complete the wireless link recovery according to the wireless link status information.

Optionally, according to the method for notifying the wireless link status between nodes according to an embodiment of the present disclosure, the receiving the wireless link status information sent by the IAB node includes:

receiving a wireless link failure recovery indication message sent by the IAB node; or

receiving routing reconfiguration information sent by the IAB node; or

Receive the wireless link failure recovery failure indication message sent by the IAB node.

Optionally, according to the method for notifying the state of the wireless link between nodes according to an embodiment of the present disclosure, before receiving the routing reconfiguration information sent by the IAB node, the method further includes:

Receive the wireless link failure recovery indication message sent by the IAB node.

Start the second wireless link failure recovery waiting timer, if the second wireless link failure recovery waiting timer expires, and the wireless link failure recovery instruction message or routing reconfiguration information sent by the IAB node is not received, determine Wireless link recovery failed.

Optionally, according to the method for notifying the state of the wireless link between nodes according to an embodiment of the present disclosure, the parameter of the second wireless link failure recovery waiting timer is the default value specified in the protocol or the value accessed by the original parent IAB node. Configured by IAB donor.

In the third aspect, the embodiment of the present disclosure also provides an integrated access and backhaul IAB node device, including a memory, a transceiver, and a processor:

A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer programs in the memory and implementing the node described in the first aspect above The steps of the method for notifying the state of the wireless link between the wireless links.

In the fourth aspect, the embodiment of the present disclosure also provides a sub-node device integrating access and backhaul IAB nodes, including a memory, a transceiver, and a processor:

A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer programs in the memory and implementing the node described in the second aspect above The steps of the method for notifying the state of the wireless link between the wireless links.

In the fifth aspect, the embodiment of the present disclosure also provides an apparatus for notifying the wireless link status between nodes, which can be applied to integrated access and backhaul IAB nodes, including:

A determining unit, configured to determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node when the IAB node wireless link fails to recover;

A sending unit, configured to determine whether to send wireless link state information to the child node based on the determined result information.

Optionally, the determining unit is configured to determine that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node when any of the following conditions is met;

Said conditions include:

Optionally, when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node, the sending unit is used for any of the following:

Sending a wireless link failure recovery indication message to the child node;

Optionally, the device further includes: a first message unit;

The first message unit is configured to send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor; or

The first message unit is configured to not send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor.

Optionally, the sending unit is used to reconstruct the IAB donor DU accessed by the original mother IAB node, the IAB donor DU different from the original mother IAB node, and the IAB donor DU different from the original mother IAB node at the IAB node In the case of other parent IAB nodes, the IAB node waits for the routing reconfiguration information sent by the IAB donor;

The sending unit is configured to send the routing reconfiguration information to the child node when the routing reconfiguration information sent by the central control node IAB donor is obtained.

Optionally, the device further includes: a second message unit;

The second message unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a central control node different from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, send a wireless link failure recovery failure indication message to the child node; or

The second message unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a central control node different from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, do not send any message to the child node; or

The second message unit is used to send to the child node when the IAB node is rebuilt to other IAB donor DUs of the same IAB donor CU as the original parent IAB node or IAB donor DUs under other IAB donor CUs A wireless link failure recovery failure indication message; or

The second message unit is used to not send a message to the child node when the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU. Send any message.

Optionally, the device further includes: a rerouting unit;

The rerouting unit is used to rebuild the parent IAB node at the IAB node to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can perform cross-IAB donor DU In the case of rerouting, the IAB node performs inter donor DU rerouting on data packets from child nodes;

The rerouting unit is configured to, when the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node Inter donor CU rerouting for data packets from child nodes;

The rerouting unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can process data packets from the child nodes In the case of cross-IAB donor DU rerouting, the IAB node performs inter donor DU rerouting on data packets from child nodes;

The rerouting unit is used to rebuild the IAB donor DU under the IAB donor CU of the central control node different from the original parent IAB node at the IAB node, and the IAB node can process data packets from the child node In the case of cross-IAB donor CU rerouting, the IAB node performs inter donor CU rerouting on data packets from child nodes.

Optionally, when the determined result information is that the parent node connected to the IAB node cannot route the data packets of the child nodes of the IAB node, the sending unit is used for any of the following:

not send any message to said child node;

Optionally, the parameter of the first radio link failure recovery waiting timer is a default value specified in the protocol or configured by an IAB donor accessed by the original parent IAB node.

Optionally, the device further includes: a third messaging unit;

The third message unit is configured to send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor; or

The third message unit is configured to not send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor.

In the sixth aspect, the embodiment of the present disclosure also provides a device for notifying the state of the wireless link between nodes, which can be applied to the child nodes of the integrated access and backhaul IAB node, including:

The receiving unit is configured to receive the wireless link status information sent by the IAB node after receiving the wireless link failure detection indication message sent by the IAB node, and determine whether to complete the wireless link recovery according to the wireless link status information .

Optionally, the receiving unit is configured to receive a wireless link failure recovery indication message sent by the IAB node; or

The receiving unit is configured to receive the routing reconfiguration information sent by the IAB node; or

The receiving unit is configured to receive a radio link failure recovery failure indication message sent by the IAB node.

Optionally, the receiving unit is further configured to receive a wireless link failure recovery indication message sent by the IAB node.

Optionally, the device further includes: a timing unit;

The timing unit is configured to start a second radio link failure recovery waiting timer;

If the second radio link failure recovery waiting timer expires, and the radio link failure recovery indication message or routing reconfiguration information sent by the IAB node is not received, the timing unit is configured to determine that the radio link recovery fails .

Optionally, the parameter of the second wireless link failure recovery waiting timer is a default value specified in the protocol or configured by an IAB donor accessed by the original parent IAB node.

In the seventh aspect, the embodiments of the present disclosure further provide a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned first aspect. The steps of the method for notifying the state of the wireless link between nodes or the method for notifying the state of the wireless link between nodes as described in the second aspect.

The method for notifying the state of the wireless link between nodes provided by the embodiments of the present disclosure judges the parent IAB node connected to after the wireless link failure of the IAB node is restored, and determines whether the parent node connected to the IAB node can route the child node data packet, to determine whether to send wireless link state information to the child node, so that the child node can obtain topology information in time, and perform real-time topology adjustment. The node mistakenly believes that the wireless link is restored and the child node data cannot be transmitted.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present disclosure. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is an IAB network topology diagram provided by the present disclosure;

FIG. 2 is a schematic diagram of the relationship between IAB nodes provided by the present disclosure;

FIG. 3 is a schematic diagram of the IAB node wireless link recovery and its connection topology with sub-nodes provided by the present disclosure;

Fig. 4 is one of the flow diagrams of the method for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an IAB node topology provided by an embodiment of the present disclosure;

FIG. 6 is the second schematic flow diagram of the method for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an IAB node device provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a child node device of an IAB node provided by an embodiment of the present disclosure;

FIG. 9 is one of the schematic structural diagrams of an apparatus for notifying the state of a wireless link between nodes provided by an embodiment of the present disclosure;

FIG. 10 is a second structural schematic diagram of an apparatus for notifying a state of a wireless link between nodes provided by an embodiment of the present disclosure.

Detailed ways

The term "and/or" in the embodiments of the present disclosure describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and/or B, which may mean: A exists alone, A and B exist simultaneously, and B exists alone These three situations. The character "/" generally indicates that the contextual objects are an "or" relationship.

The term "plurality" in the embodiments of the present disclosure refers to two or more, and other quantifiers are similar.

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

The technical solutions provided by the embodiments of the present disclosure can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless business (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G new air interface (New Radio, NR) system, etc. These various systems include end devices and network devices. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.

The terminal device (such as UE) involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called User Equipment (User Equipment, UE). The wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via the radio access network (Radio Access Network, RAN), and the wireless terminal equipment can be a mobile terminal equipment, such as a mobile phone (or called a "cellular "telephones) and computers with mobile terminal equipment, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phone, cordless phone, Session Initiated Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant, PDA) and other devices. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), and user device (user device), which are not limited in the embodiments of the present disclosure.

The network device involved in the embodiments of the present disclosure may be a base station, and the base station may include multiple cells that provide services for terminals. Depending on the specific application, the base station can also be called an access point, or it can be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to interchange received over-the-air frames with Internet Protocol (IP) packets and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet Protocol (IP) communication network. Network devices may also coordinate attribute management for the air interface. For example, the network equipment involved in the embodiments of the present disclosure may be a network equipment (Base Transceiver Station, BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA) ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long-term evolution (long term evolution, LTE) system (evolutional Node B, eNB or e-NodeB), a 5G base station (gNB) in the 5G network architecture (next generation system), or a Home evolved Node B (HeNB), a relay node (relay node) , a home base station (femto), a pico base station (pico), etc., are not limited in this embodiment of the present disclosure. In some network structures, a network device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

Integrated Access and Backhaul (IAB) network consists of IAB donor (IAB host node or IAB central control node), IAB node (IAB node) and terminals. Figure 1 is a topological diagram of the IAB network provided by this disclosure. As shown in Figure 1, the IAB donor is used to connect to the core network, transmit the information of the IAB nodes and terminals back to the core network, and transmit the information of the core network to the IAB nodes and terminal. IAB donor is also responsible for managing IAB nodes and terminals in the entire IAB network. The IAB donor can be further divided into a central unit (Central Unit, CU) and a distributed unit (Distributed Unit, DU). The IAB donor CU is responsible for network configuration, including routing configuration, channel mapping configuration, and QoS parameter configuration for each hop.

The IAB node is responsible for relaying the information and data of the terminal to the IAB donor (uplink) through the wireless link (Uu interface), and relaying the information and data of the IAB donor to the terminal (downlink). Between IAB nodes, and between IAB nodes and IAB donors are connected through wireless links. The IAB architecture can implement transmission through multiple hops, and there can be multiple paths to reach an IAB node or a terminal (as shown in Figure 1, there are two paths including path 1 and path 2). As shown in FIG. 1 , IAB node 1 is a parent node of IAB node 2 , IAB node 3 is a child node of IAB node 2 , and IAB node 3 is a descendant node of IAB node 1 .

Figure 2 is a schematic diagram of the relationship between IAB nodes provided by the present disclosure. As shown in Figure 2, in the IAB network topology, an IAB node is composed of two parts, one part is an IAB mobile terminal (IAB Mobile Termination, IAB MT), and the IAB MT is on the Connect the DU part of the donor or the upper-level IAB node; the other part is the IAB distributed unit (IAB Distributed Unit, IAB DU), and the IAB DU is connected to the terminal or the MT part of the lower-level IAB node.

When the wireless link between an IAB node and its parent node fails, the IAB node needs to send a BH wireless link failure detection indication (BH RLF detection indication), also known as type-2 RLF indication, to its child nodes, and its child nodes can perform Data rerouting (rerouting) and other operations; after the wireless link between the IAB node and its parent node is restored, it can send a BH wireless link recovery indication (BH RLF recovery indication), also known as type-3 RLF indication, to its child nodes, then The child node resumes data transmission with the IAB node; if the IAB node fails to recover the wireless link, it sends a BH wireless link recovery failure indication (BH RLF recovery failure indication), also known as type-4 RLF indication, to the child node, then The child node confirms the BH RLF and initiates the RRC connection reestablishment process. Table 1 shows the introduction of the BH wireless link indication types. Taking Fig. 2 as an example, when a wireless link failure occurs between IAB2 and IAB1, IAB2 initiates an RRC connection reestablishment process, and simultaneously sends a BH wireless link failure detection indication to IAB3; Successfully establish an RRC connection with an IAB node or a cell under the IAB donor DU), then IAB2 sends a BH wireless link recovery indication to IAB3; if the IAB2 wireless link recovery fails (that is, IAB2 cannot communicate with any IAB node or IAB donor DU established RRC connection), then IAB2 sends a BH radio link recovery failure indication to IAB3.

Table 1. BH wireless link indication type

In the existing mechanism, after the IAB node sends the BH radio link failure detection indication to the child node, if the radio link of the IAB node recovers, it sends the BH radio link recovery indication to the child node. There is a risk in this mechanism. If the IAB node rebuilds to an IAB node or IAB donor that cannot support its child nodes, the IAB node will send a wireless link recovery to its child nodes after the wireless link is restored, not only cannot restore the normal data of the child nodes Transmission, on the contrary, will delay the time for the child node to find the abnormality.

Figure 3 is a schematic diagram of the IAB node wireless link recovery and its connection topology with sub-nodes provided by the present disclosure. The name of the name is treated in the same way, and will not be described in detail below) Originally, the RRC connection with IAB2 is maintained, and the data between IAB5 and IAB donor is transmitted through the IAB2 and IAB1 paths. IAB1 is rebuilt to IAB6 (belonging to the same IAB donor CU and the same IAB donor DU as IAB2), then IAB6 can route the data packets from IAB5; but if IAB1 is rebuilt to IAB3 (belonging to the same IAB donor CU as IAB2 is different IAB donor DU), and IAB3 cannot route data packets from IAB5; or IAB1 is rebuilt to IAB4 (which belongs to a different IAB donor CU from IAB2), not only IAB4 cannot route IAB5 data packets, but IAB donor CU2 cannot recognize IAB5 at all.

Fig. 4 is one of the flow diagrams of the method for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure. As shown in Fig. 4, the method can be applied to IAB nodes, including:

Step 100, in the case that the wireless link of the IAB node fails to recover, determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Specifically, the failure recovery of the wireless link of the IAB node refers to the situation that the IAB node restores the wireless link after the wireless link between the IAB node and its parent node fails, which may be that the IAB node is rebuilt to the original parent node, or The IAB node is rebuilt to the new parent node.

The parent node connected to the IAB node can be a parent IAB node or an IAB donor. Exemplarily, referring to FIG. 1, taking IAB node 2 (IAB-node 2) as an example, in path 1 (IAB donor-IAB node1-IAB node2 -UE), the parent node of IAB node 2 is the parent IAB node, that is, IAB node 1 (IAB-node 1); in path 2 (IAB donor-IAB node2-UE), the parent node of IAB node 2 is IAB donor .

For determining whether the parent node connected to the IAB node can route the data packet of the child node of the IAB node, it refers to whether the parent node connected to the IAB node can serve the child node, that is, where the IAB node is located Whether the entire link can route data packets of child nodes.

Step 110, based on the determined result information, determine whether to send radio link state information to the child node.

Specifically, the determination-based result information refers to determining whether to send a wireless link to the child node based on the judgment result of whether the parent node connected to the IAB node can route the data packet of the child node of the IAB node. Based on whether the wireless link state information is received and the received wireless link state information, the subnode determines whether to resume data transmission.

Optionally, the determining whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node includes:

In the case of meeting any of the following conditions, it is determined that the parent node connected to the IAB node can route the packet of the child node of the IAB node;

Said conditions include:

Exemplarily, FIG. 5 is a schematic diagram of an IAB node topology provided by an embodiment of the present disclosure. As shown in FIG. 5, taking IAB node 1 (IAB1) as an example, the child node of IAB node 1 is IAB node 5 (IAB5). Before the wireless link between node 1 and its parent node fails, it is connected to IAB node 2 (the original parent IAB node), and IAB node 2 (IAB2) is connected to IAB donor DU11.

For the IAB node reestablished to the original mother IAB node before the wireless link failure occurs, it means that the IAB node 1 is reestablished to the IAB node 2 .

For the parent IAB node whose IAB node is rebuilt to the same central control node distributed unit IAB donor DU as the original parent IAB node, it means that IAB node 1 is rebuilt to IAB node 6.

For the parent IAB node that is rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, the IAB node can perform cross-IAB donor data packets from the child node The rerouting of DU means that IAB node 1 is rebuilt to IAB node 3, and the entire link where the IAB node 1 is located can route the data packets of the child nodes, that is, the IAB node can route the data packets from the child IAB node, the destination address The uplink data packet with the BAP address of the original IAB donor DU is rerouted through the new IAB donor DU. Specifically, when IAB node 1 receives a data packet whose target address is the BAP address of the original IAB donor DU (IAB donor DU11) from the child node IAB node 5 (IAB5), it can rewrite the target address to the new IAB donor DU (IAB donor DU12) BAP address; and after the new IAB donor DU (IAB donor DU12) receives the uplink data packet, it can correctly parse and submit it to the IAB donor CU (IAB donor CU1).

For the IAB node rebuilt to the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can re-route the data packets from the child nodes across the IAB donor CU , means that IAB node 1 is rebuilt to IAB node 4, and the entire link where the IAB node 1 is located can route the data packets of the child nodes, that is, IAB node 1 receives the data packet from the child node IAB node 5 , the original routing ID in the data packet can be rewritten to a new routing ID that can be recognized by the new IAB donor CU and IAB donor DU, and the new IAB donor CU (IAB donor CU2) and IAB donor DU (IAB donor DU2) receive the After the packet, it can be forwarded to the original IAB donor CU (IAB donor CU1).

The reconstruction of the IAB node to the IAB donor DU accessed by the original parent IAB node refers to the reconstruction of the IAB node 1 to the IAB donor DU11. In this case, the destination address of the data packet from child node IAB node 5 remains unchanged, which is IAB donor DU11, and IAB donor DU11 can identify the data packet of IAB node 5 and send the data packet to IAB donor CU.

For the different IAB donor DUs that the IAB node is rebuilt to the same central control node central unit IAB donor CU as the original mother IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor DU , means that IAB node 1 is rebuilt to IAB donor DU12, and the entire link where the IAB node 1 is located can route data packets from child nodes, that is, the IAB node can route data packets from child IAB nodes with the destination address of the original IAB donor The uplink data packet of the BAP address of the DU is rerouted through the new IAB donor DU. Specifically, when IAB node 1 receives a data packet whose target address is the BAP address of the original IAB donor DU (IAB donor DU11) from child node IAB node 5, the target address can be rewritten as the new IAB donor DU (IAB donor DU11). DU12) BAP address; and after receiving the uplink data packet, the new IAB donor DU (IAB donor DU12) can correctly parse and submit it to the IAB donor CU (IAB donor CU1).

For the IAB donor DU rebuilt to the IAB donor CU under the central control node central unit different from the original parent IAB node, the IAB node can reroute the data packets from the child nodes across the IAB donor CU , means that IAB node 1 is rebuilt to IAB donor DU2, and the entire link where the IAB node 1 is located can route the data packets of the child nodes, that is, IAB node 1 receives the data packet from the child node IAB node 5 , the original routing ID in the data packet can be rewritten to a new routing ID that can be recognized by the new IAB donor CU and IAB donor DU, and the new IAB donor CU (IAB donor CU2) and IAB donor DU (IAB donor DU2) receive the After the packet, it can be forwarded to the original IAB donor CU (IAB donor CU1).

Optionally, the IAB node can re-route the data packets from the child nodes across IAB donor CUs, which can be determined through a routing table. Specifically, if the newly accessed parent node is in the routing table, it can be determined that the new IAB donor CU and IAB donor DU can forward the data packet to the original IAB donor CU after receiving the data packet, so as to determine the link where the IAB node is located Ability to reroute data packets from said child nodes across IAB donor CUs.

Optionally, the IAB node can re-route the data packet from the child node across the IAB donor DU, which can be determined through a routing table. Specifically, if the newly accessed parent node is in the routing table, it can be determined that after the newly accessed IAB donor DU receives the data packet from the child node, it can correctly parse it and submit it to the IAB donor CU, so as to determine the location of the IAB node Links are capable of rerouting packets from said child nodes across IAB donor DUs.

The method for notifying the state of the wireless link between nodes provided by the embodiments of the present disclosure determines whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node by judging whether the above conditions are met, based on the determined Result information, determine whether to send wireless link state information to the child node, so that the child node can obtain topology information in time, and perform real-time topology adjustment, to solve the problem that the child node cannot route data because the IAB node is connected to the parent node The node mistakenly believes that the wireless link is restored and the child node data cannot be transmitted.

Optionally, the method also includes:

Exemplarily, referring to Fig. 5, for the parent IAB node rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node at the IAB node, and the IAB node can perform cross-IAB donor In the case of DU rerouting, the IAB node performs inter donor DU rerouting on data packets from child nodes, which means that IAB node 1 is rebuilt to IAB node 3, and the entire link where the IAB node 1 is located can The packet of child node is routed, and IAB node 1 rewrites this target address IAB donor DU11 as The BAP address of the new IAB donor DU (IAB donor DU12).

In the case where the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node is responsible for the data packets from the child nodes Performing inter donor CU rerouting means that IAB node 1 is rebuilt to IAB node 4, and the entire link where the IAB node 1 is located can route data packets from child nodes, and IAB node 1 receives data packets from child node IAB For the data packet of node 5, rewrite the original routing ID in the data packet to a new routing ID that can be recognized by the new IAB donor CU and IAB donor DU, and the new IAB donor CU (IAB donor CU2) and IAB donor DU (IAB donor DU2 ) after receiving the data packet, forward the data packet to the original IAB donor CU (IAB donor CU1).

For rebuilding at the IAB node to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can retransmit the data packets from the child nodes across IAB donor DU In the case of routing, the IAB node performs inter donor DU rerouting on the data packet from the child node, which means that the IAB node 1 is rebuilt to the IAB donor DU12, and the entire link where the IAB node 1 is located can send data packets to the child node When the IAB node 1 receives the data packet whose destination address is the BAP address of the original IAB donor DU (IAB donor DU11) from the child node IAB node 5, it rewrites the destination address IAB donor DU11 to the new IAB The BAP address of the donor DU (IAB donor DU12).

For the IAB donor DU rebuilt at the IAB node to the central control node central unit IAB donor CU different from the original mother IAB node, and the IAB node can retransmit the data packets from the child node across the IAB donor CU In the case of routing, the IAB node performs inter donor CU rerouting on the data packets from the child nodes, which means that the IAB node 1 is rebuilt to the IAB donor DU2, and the entire link where the IAB node 1 is located can send data packets to the child nodes. When IAB node 1 receives the data packet from child node IAB node 5, it rewrites the original routing ID in the data packet to a new routing ID that can be recognized by the new IAB donor CU and IAB donor DU. After receiving the data packet, IAB donor CU (IAB donor CU2) and IAB donor DU (IAB donor DU2) forward the data packet to the original IAB donor CU (IAB donor CU1).

Optionally, when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node, based on the determined result information, it is determined whether to send to the child node Nodes send radio link state information, including any of the following:

Sending a wireless link failure recovery indication message to the child node;

Specifically, for sending the wireless link failure recovery indication message to the child node, it is to send a type-3 RLF indication message to the child node, and indicate the current IAB node wireless link recovery to the child node.

Optionally, in the case of obtaining the routing reconfiguration information sent by the central control node IAB donor, sending the routing reconfiguration information to the child node includes:

Exemplarily, referring to FIG. 5 , for the case where the IAB node rebuilds the IAB donor DU accessed by the original mother IAB node, it means that the IAB node 1 rebuilds the IAB donor DU accessed by the original mother IAB node IAB node 2 In this case, IAB node 1 is rebuilt to IAB donor DU11.

For the case where the IAB node is rebuilt to an IAB donor DU that is different from the original parent IAB node, it means that the IAB node 1 is rebuilt to a different IAB donor DU (IAB donor DU11) from the original parent IAB node IAB node 2. In the case of IAB donor DU, that is, IAB node 1 is rebuilt to IAB donor DU12 or IAB donor DU2.

For the situation where the IAB node is rebuilt to other parent IAB nodes different from the original parent IAB node, it refers to the situation where IAB node 1 is rebuilt to other parent IAB nodes except the original parent IAB node IAB node 2, that is, IAB node 1 is rebuilt to IAB Node 6, IAB Node 3, or IAB Node 4.

Optionally, the method also includes:

Exemplarily, when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node, after obtaining the routing reconfiguration information sent by the central control node IAB donor Before, send a type-3 RLF indication message to the child node, and send the route reconfiguration information to the child node when the routing reconfiguration information sent by the central control node IAB donor is obtained; or, after obtaining the central control node IAB donor Before the routing reconfiguration information sent by the control node IAB donor, the type-3 RLF indication message is not sent to the child node, and the routing reconfiguration information sent by the central control node IAB donor is obtained, and the routing reconfiguration information is directly sent to the child node. Route reconfiguration information described above.

Optionally, the method also includes:

Exemplarily, referring to FIG. 5, for the parent IAB node rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node at the IAB node, or a different central control node from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, sending a wireless link failure recovery failure indication message to the child node means that when IAB node 1 is rebuilt to IAB node 3, or when IAB node 1 is rebuilt In the case of IAB node 4, send a type-4 RLF indication message to child node IAB node 5, and indicate to the child node that the wireless link recovery of the current IAB node fails.

For the parent IAB node rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU from the original parent IAB node, or the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node In the case of an IAB node, not sending any message to the child node means not sending any message to the child node when IAB node 1 is rebuilt to IAB node 3, or when IAB node 1 is rebuilt to IAB node Node IAB node 5 sends any message, under the situation that child node IAB node 5 opens the second wireless link failure recovery waiting timer, when the second wireless link failure recovery waiting timer expires, IAB node 5 does not receive any message message, the IAB node 5 may determine that the wireless link recovery of the current IAB node fails.

When the IAB node is rebuilt to other IAB donor DUs of the same IAB donor CU as the original parent IAB node or IAB donor DUs under other IAB donor CUs, send a radio link failure recovery failure indication message to the child node , means that when IAB node 1 is rebuilt to IAB donor DU12, or when IAB node 1 is rebuilt to IAB donor DU2, a type-4 RLF indication message is sent to the child node IAB node 5 to indicate the current IAB to the child node Node wireless link recovery failed.

In the case where the IAB node is rebuilt to other IAB donor DUs of the same IAB donor CU as the original parent IAB node or IAB donor DUs under other IAB donor CUs, no message is sent to the child node, which means that the IAB When node 1 is rebuilt to IAB donor DU12, or when IAB node 1 is rebuilt to IAB donor DU2, do not send any message to the child node IAB node 5, and open the second wireless link at child node IAB node 5 In the case of the failure recovery waiting timer, when the second wireless link failure recovery waiting timer expires, the IAB node 5 does not receive any message, and the IAB node 5 may determine that the current IAB node wireless link recovery fails.

Cross-IAB donor DU rerouting or cross-IAB donor CU rerouting may have problems that are difficult to implement. For example, cross-IAB donor CU rerouting requires pre-judging the IAB donor CU that may be rebuilt when the IAB node may have a wireless link failure, and provide it Pre-configure the rewriting table (rewriting table), which is difficult to implement. The method for notifying the state of the wireless link between nodes provided by the embodiments of the present disclosure determines whether to send wireless link state information to the child node by judging whether the above conditions are met. In the case of CU rerouting, it indicates that the wireless link recovery of the current IAB node of the child node fails, so that the child node can obtain topology information in time and perform real-time topology adjustment, avoiding the difficulty of cross-IAB donor DU rerouting or cross-IAB donor CU rerouting The problem of implementation is to solve the problem that the data of the child node cannot be transmitted because the IAB node is connected to the parent node that cannot route the data of the child node, and the child node mistakenly believes that the wireless link is restored.

Optionally, in the case where the determined result information is that the parent node connected to the IAB node cannot route the data packets of the child nodes of the IAB node, based on the result information, it is determined whether to send to the The child node sends wireless link status information, including any of the following:

not send any message to said child node;

For sending the wireless link failure recovery failure indication message to the child node, it is to send a type-4 RLF indication message to the child node, and indicate the current IAB node wireless link recovery failure to the child node.

For not sending any message to the child node, when the child node starts the second wireless link failure recovery waiting timer, when the second wireless link failure recovery waiting timer expires, the child node does not receive any message , the child node can determine that the wireless link recovery of the current IAB node fails.

For starting the first wireless link failure recovery waiting timer, it is determined that the first wireless link failure recovery waiting timer is overtime, and the wireless link failure recovery failure indication message is sent to the child node, and the IAB node determines that the newly accessed The parent node can serve the child node or the newly accessed parent node can reconfigure the child node, but there may be a configuration delay caused by the parent node being temporarily unable to accept the child node, etc. When the first wireless link fails to recover and wait for the timing timeout, the reconfiguration information sent by the parent node is not received, and a type-4 RLF indication message is sent to the child node, indicating to the child node that the current IAB node wireless link recovery fails, so that the child node performs real-time topology adjustment, Avoid long waits and delays in data transmission.

For starting the first radio link failure recovery waiting timer, no message is sent to the child node, and the first radio link failure recovery waiting timer on the IAB node side can be connected with the second radio link failure recovery waiting timer on the child node side. The timer is used in conjunction with it. It can be understood that the time parameter of the first wireless link failure recovery waiting timer needs to be ahead of the second wireless link failure recovery waiting timer for a period of time, so as to realize the cooperation between the IAB node and the sub-node. Exemplarily, the timing of the first radio link failure recovery waiting timer is 30 milliseconds, and the timing of the second radio link failure recovery waiting timer is 40 milliseconds, so as to avoid the timer timeout when the child node receives the message due to the delay of signaling transmission .

Optionally, the method also includes:

Exemplarily, when the determined result information is that the parent node connected to the IAB node cannot route the data packets of the child nodes of the IAB node, after obtaining the route reconfiguration sent by the central control node IAB donor Before the information, send a type-3 RLF indication message to the child node, and send the route reconfiguration information to the child node in the case of obtaining the routing reconfiguration information sent by the central control node IAB donor; or, after obtaining Before the routing reconfiguration information sent by the central control node IAB donor, the type-3 RLF indication message is not sent to the child nodes, and when the routing reconfiguration information sent by the central control node IAB donor is obtained, it is directly sent to the child nodes The routing reconfiguration information.

Fig. 6 is the second schematic flow diagram of the method for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure. As shown in Fig. 6, the method can be applied to the child nodes of the IAB node, including:

Step 200: After receiving the wireless link failure detection instruction message sent by the IAB node, receive the wireless link status information sent by the IAB node, and determine whether to complete the wireless link recovery according to the wireless link status information.

Specifically, the IAB node refers to the IAB node accessed by the child node. The wireless link failure detection indication message refers to a type-2 RLF indication message, and the wireless link status information is determined by the IAB node based on whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node .

In the method for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure, the child node determines whether to complete the wireless link recovery according to the wireless link state information by receiving the wireless link state information sent by the IAB node, so that This enables child nodes to obtain topology information in a timely manner and perform real-time topology adjustments to solve the problem that child node data cannot be transmitted because the IAB node is connected to the parent node that cannot route child node data, and the child node mistakenly believes that the wireless link is restored.

Optionally, the receiving the wireless link state information sent by the IAB node includes:

Receive the wireless link failure recovery indication message sent by the IAB node, specifically, the wireless link failure recovery indication message is a type-3 RLF indication message, which is used to indicate the current IAB node wireless link recovery; or

receiving routing reconfiguration information sent by the IAB node; or

Receive the wireless link failure recovery failure indication message sent by the IAB node, specifically, the wireless link failure recovery failure indication message is a type-4 RLF indication message, which is used to indicate the current IAB node wireless link recovery failure.

Optionally, before receiving the routing reconfiguration information sent by the IAB node, the method further includes:

Specifically, the wireless link failure recovery indication message is a type-3 RLF indication message, which is used to indicate the current IAB node wireless link recovery, and the child node resumes data transmission after receiving the type-3 RLF indication message, and receives routing reconfiguration information After that, route reconfiguration is performed based on the route reconfiguration information.

Optionally, the method also includes:

Exemplarily, the child node starts the second wireless link failure recovery waiting timer, and the timing is 40 milliseconds. When the second wireless link failure recovery waiting timer expires, the child node has not yet received the wireless link failure recovery message sent by the IAB node. Indication message or route reconfiguration information, the child node determines that the wireless link recovery fails, and can initiate the RRC connection reestablishment process. The child node starts the second wireless link failure recovery waiting timer, and determines that the wireless link recovery fails based on the second wireless link failure recovery waiting timer and the failure to receive the message sent by the IAB node, and the child node does not need to pass the type-4 RLF indication message It is determined that the wireless link recovery fails to save signaling resources.

The method for notifying the state of the wireless link between nodes provided by the embodiments of the present disclosure will be introduced below in conjunction with multiple embodiments.

Embodiment 1: The IAB node is rebuilt to the original parent IAB node.

IAB node:

Step 1: When a wireless link failure occurs, send a type-2 RLF indication to the child node, and start performing wireless link recovery;

Step 2: Determine whether to rebuild to the original IAB node.

Step 3: Send type-3 RLF indication to the child node.

Child IAB node:

Step 1: Receive the type-2 RLF indication sent by the parent node (that is, the IAB node to which the child node is connected), and reroute the data packets to be sent to the parent node to other paths as needed, or perform other abnormal conditions Operations, such as reducing the sending of uplink data.

Step 2: Receive the type-3 RLF indication sent by the parent node, resume the transmission with the parent node, and stop all operations under abnormal conditions.

The difference between Embodiment 1 and the prior art is that the IAB node needs to check whether the parent IAB node is the original IAB node before sending the type-3 RLF indication.

Embodiment 2: The IAB node is rebuilt to other parent IAB nodes under the original IAB donor DU.

IAB node:

Step 2: Determine whether the new parent IAB node is in the routing table of the IAB node, so as to determine whether the IAB node can reroute the data packets from the child nodes.

Step 3: Send type-3 RLF indication to the child node, wait for the IAB donor to send the routing reconfiguration message, and then send the routing reconfiguration message to the child node. or,

Step 3': Do not send type-3 RLF indication to the child node, wait for the IAB donor to send the routing reconfiguration message, and then send the routing reconfiguration message to the child node.

Child IAB node:

Step 1: Receive the type-2RLF indication sent by the parent node (that is, the IAB node connected to the child node), and reroute the data packets to be sent to the parent node to other paths for transmission as needed, or perform other abnormal operations, such as Reduce the sending of uplink data, etc.

Step 2 (corresponding to IAB node step 3): Receive the type-3 RLF indication sent by the parent node, resume transmission with the parent node, and stop all operations under abnormal conditions. Subsequent receiving of routing reconfiguration messages, data transmission is performed according to the new routing configuration. or,

Step 2' (corresponding to IAB node step 3'): Receive the routing reconfiguration message sent by the parent node, resume the transmission with the parent node according to the new routing configuration, and stop all operations under abnormal conditions.

The difference between Embodiment 2 and the prior art is that before the IAB node sends the type-3 RLF indication, it must first perform the operation of whether the parent IAB node is in the routing table, that is, determine whether the IAB node can reroute the data packets from the child nodes . Optionally, after the wireless link fails and recovers, the parent node may not send the type-3 RLF indication to the child node, but directly sends the route reconfiguration message to the child node after receiving the route reconfiguration message.

Embodiment 3: The IAB node rebuilds to other IAB donor DUs and/or other IAB donor CUs of the same IAB donor CU as the original parent node (triggering child node wireless link failure)

IAB node:

Step 2: Determine whether the new parent node belongs to other IAB donor DUs and/or other IAB donor CUs of the same IAB donor CU, and if so, send type-4 RLF indication to the child node, or do not send any indication.

Child IAB node:

Step 2: Receive type-4 RLF indication, initiate RRC connection re-establishment, or start the pre-configured "second radio link failure recovery waiting timer", if the timer expires, the child node still has not received any information from the IAB node Indicates that a radio link failure occurs and initiates RRC connection re-establishment.

Embodiment 4: The IAB node is rebuilt to an IAB node under another IAB donor DU of the same IAB donor CU.

IAB node:

Step 2: Determine whether the new parent IAB node belongs to other IAB donor DUs of the same IAB donor CU, and further determine whether inter-DU rerouting can be performed on data from child nodes. If yes, go to step 3, if not, go to step 4;

Step 3: Send a type-3 RLF indication to the child node, perform inter-DU rerouting on the data from the child node, and send a routing reconfiguration message to the child node after receiving the routing reconfiguration message sent by the IAB donor, or,

Do not send type-3 RLF indication to the child node, and send the route reconfiguration message to the child node after receiving the routing reconfiguration message sent by the IAB donor.

Step 4: Send type-4 RLF indication to the child node, or do not send any indication.

Child IAB node:

Step 2 (corresponding to IAB node step 3): Receive the type-3 RLF indication sent by the parent node, resume transmission with the parent node, and stop all operations under abnormal conditions. Subsequent receiving of routing reconfiguration messages, data transmission is performed according to the new routing configuration. or

If the route reconfiguration message sent by the IAB node is directly received, the transmission with the parent node is resumed, and all operations under abnormal conditions are stopped.

Step 3 (corresponding to IAB node step 4): Receive type-4 RLF indication, initiate RRC connection reconstruction, or start the pre-configured "second radio link failure recovery waiting timer", if the timer does not receive after the timer expires The instruction of the IAB node considers that a radio link failure occurs and initiates RRC connection reestablishment.

Embodiment 5: The IAB node is rebuilt to an IAB node under another IAB donor CU.

IAB node:

Step 2: Determine whether the new parent IAB node belongs to other IAB donor CUs, and further determine whether inter-CU rerouting can be performed on data from child nodes. If yes, go to step 3, if not, go to step 4;

Step 3: Send a type-3 RLF indication to the child node, perform inter-CU rerouting on the data from the child node, and send a routing reconfiguration message to the child node after receiving the routing reconfiguration message sent by the IAB donor, or,

Do not send type-3 RLF indication to child nodes, and send route reconfiguration messages to child nodes after receiving the routing reconfiguration message sent by IAB donor.

Child IAB node:

Step 3 (corresponding to IAB node step 4): Receive type-4 RLF indication, initiate RRC connection reestablishment, or start the pre-configured "master node radio link failure recovery waiting timer", if the timer does not receive after the timer expires The instruction of the IAB node considers that a radio link failure occurs and initiates RRC connection reestablishment.

FIG. 7 is a schematic structural diagram of an IAB node device provided by an embodiment of the present disclosure. As shown in FIG. 7, the IAB node device includes a transceiver 700, a processor 710, and a memory 720, wherein:

The memory 720 is used for storing computer programs; the transceiver 700 is used for receiving and sending data under the control of the processor 710 .

Wherein, in FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 710 and various circuits of the memory represented by the memory 720 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 700 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. The processor 710 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 710 when performing operations.

The processor 710 may be a central processing unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.

The processor 710 is used to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 720, for example:

The IAB node is rebuilt to the IAB donor DU accessed by the original parent IAB node;

Sending a wireless link failure recovery indication message to the child node;

Optionally, the operations also include:

not send any message to said child node;

Optionally, the operations also include:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, sending a wireless link failure recovery indication message to the child node; or

What needs to be explained here is that the above-mentioned terminal device and network device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The same parts and beneficial effects of the method embodiments are described in detail.

FIG. 8 is a schematic structural diagram of a sub-node device of an IAB node provided by an embodiment of the present disclosure. As shown in FIG. 8 , the sub-node device of the IAB node includes a transceiver 800, a processor 810, and a memory 820, wherein:

The memory 820 is used for storing computer programs; the transceiver 800 is used for receiving and sending data under the control of the processor 810 .

Wherein, in FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 810 and various circuits of the memory represented by the memory 820 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. The transceiver 800 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical cables, and other transmission media. Processor 810 is responsible for managing the bus architecture and general processing, and memory 820 may store data used by processor 810 when performing operations.

The processor 810 can be a central processing unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.

The processor 810 is used to execute any of the methods provided in the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 820, for example:

receiving routing reconfiguration information sent by the IAB node; or

Optionally, before receiving the routing reconfiguration information sent by the IAB node, the operation further includes:

Optionally, the operations also include:

FIG. 9 is one of the schematic structural diagrams of an apparatus for notifying the state of a wireless link between nodes provided by an embodiment of the present disclosure. As shown in FIG. 9, the apparatus can be applied to an IAB node, including:

A determining unit 910, configured to determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node in the case of recovery from failure of the wireless link of the IAB node;

The sending unit 920 is configured to determine whether to send wireless link state information to the subnode based on the determined result information.

Optionally, the determining unit 910 is configured to determine that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node when any of the following conditions is met;

Said conditions include:

Optionally, when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node, the sending unit 920 is configured for any of the following:

Sending a wireless link failure recovery indication message to the child node;

Optionally, the device further includes: a first message unit;

Optionally, the sending unit 920 is used to reconstruct the IAB donor DU accessed by the original mother IAB node, the IAB donor DU different from the original mother IAB node, and the IAB donor DU different from the original mother IAB node at the IAB node. In the case of other parent IAB nodes, the IAB node waits for the routing reconfiguration information sent by the IAB donor;

The sending unit 920 is configured to send the routing reconfiguration information to the child node when the routing reconfiguration information sent by the central control node IAB donor is obtained.

Optionally, the device further includes: a second message unit;

The second message unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a central control node different from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, no message is sent to said child node; or

Optionally, the device further includes: a rerouting unit;

Optionally, when the determined result information is that the parent node connected to the IAB node cannot route the data packets of the child nodes of the IAB node, the sending unit 920 is configured for any of the following:

not send any message to said child node;

Optionally, the device further includes: a third messaging unit;

Fig. 10 is the second structural diagram of the device for notifying the state of the wireless link between nodes provided by the embodiment of the present disclosure. As shown in Fig. 10, the device can be applied to the child nodes of the IAB node, including:

The receiving unit 1010 is configured to receive the wireless link state information sent by the IAB node after receiving the wireless link failure detection indication message sent by the IAB node, and determine whether to complete the wireless link according to the wireless link state information. recover.

Optionally, the receiving unit 1010 is configured to receive a wireless link failure recovery indication message sent by the IAB node; or

The receiving unit 1010 is configured to receive the routing reconfiguration information sent by the IAB node; or

The receiving unit 1010 is configured to receive a radio link failure recovery failure indication message sent by the IAB node.

Optionally, the receiving unit 1010 is further configured to receive a wireless link failure recovery indication message sent by the IAB node.

Optionally, the device further includes: a timing unit;

The methods and devices provided by the various embodiments of the present disclosure are based on the conception of the same application. Since the principles of the methods and devices to solve problems are similar, the implementation of the devices and methods can be referred to each other, and repeated descriptions will not be repeated.

It should be noted that the division of units in the embodiments of the present disclosure is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

It should be noted here that the above-mentioned device provided by the embodiment of the present invention can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect. The part and the beneficial effect are described in detail.

On the other hand, the embodiments of the present disclosure further provide a processor-readable storage medium, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned embodiments. The notification method of the wireless link status between nodes includes:

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

Those skilled in the art should understand that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each procedure and/or block in the flowchart and/or block diagrams, and combinations of procedures and/or blocks in the flowchart and/or block diagrams can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine, such that instructions executed by the processor of the computer or other programmable data processing equipment produce Means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacturing product, the instruction device realizes the functions specified in one or more procedures of the flow chart and/or one or more blocks of the block diagram.

These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented The executed instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagrams.

It is obvious that those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies thereof, the present disclosure also intends to include these modifications and variations.

Claims

A method for notifying the state of a wireless link between nodes is characterized in that it is applied to integrated access and return IAB nodes, including:

In the case that the IAB node wireless link fails to recover, determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Based on the determined result information, determine whether to send wireless link state information to the child node.
The notification method of the wireless link state between nodes according to claim 1, wherein said determining whether the parent node connected to the IAB node can route the packet of the child node of the IAB node comprises:

When any of the following conditions is met, it is determined that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Said conditions include:

The IAB node is rebuilt to the original mother IAB node before the wireless link failure occurs;

The IAB node is rebuilt to the parent IAB node of the same central control node distributed unit IAB donorDU as the original parent IAB node;

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donorDU, and the IAB node can perform cross-IAB donor DU transfer of data packets from the child nodes rerouting;

The IAB node is rebuilt to the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can re-route the data packets from the child nodes across the IAB donor CU;

The IAB node is rebuilt to the IAB donor DU accessed by the original parent IAB node;

The IAB node is rebuilt to a different IAB donor DU of the same central control node central unit IAB donor CU as the original mother IAB node, and the IAB node can reroute data packets from the child nodes across the IAB donor DU;

The IAB node is rebuilt to the IAB donor DU under the IAB donor CU of the central control node different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU.
The method for notifying the wireless link state between nodes according to claim 1 or 2, wherein the result information is that the parent node connected to the IAB node can perform data packets on the child nodes of the IAB node In the case of routing, the determination of whether to send wireless link state information to the child node based on the determined result information includes any of the following:

Sending a wireless link failure recovery indication message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The method for notifying the state of a wireless link between nodes according to claim 3, wherein the method further comprises:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, send a wireless link failure recovery indication message to the child node; or

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, the wireless link failure recovery instruction message is not sent to the child node.
The notification method of the wireless link state between nodes according to claim 3, wherein, in the case of obtaining the route reconfiguration information sent by the central control node IAB donor, sending the route to the child node Reconfiguration information, including:

When the IAB node is reconstructed to the IAB donor DU accessed by the original parent IAB node, the IAB donor DU different from the original parent IAB node, and other parent IAB nodes different from the original parent IAB node, the IAB node Wait for the routing reconfiguration information sent by the IAB donor;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The method for notifying the state of a wireless link between nodes according to claim 1 or 2, wherein the method further comprises:

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, sending a wireless link failure recovery failure indication message to the child node; or

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, no message is sent to said child node; or

In the case that the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU, send a wireless link failure recovery failure indication message to the child node; or

When the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU, no message is sent to the child node.
The method for notifying the state of a wireless link between nodes according to claim 3, wherein the method further comprises:

In the case where the IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donor DU, and the IAB node is capable of rerouting across IAB donor DUs, the The IAB node performs inter donor DU rerouting on data packets from child nodes;

When the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node performs data packets from the child node inter donor CU rerouting;

The IAB node is rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original mother IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor DU In this case, the IAB node performs inter donor DU rerouting on data packets from child nodes;

The IAB node is rebuilt to the IAB donor DU under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU In the case of , the IAB node performs inter donor CU rerouting on the data packet from the child node.
According to claim 1 or 2, the notification method of the wireless link state between nodes is characterized in that, the determined result information is that the parent node connected to the IAB node cannot respond to the data packet of the child node of the IAB node In the case of routing, the determining whether to send wireless link state information to the child node based on the result information includes any of the following:

Sending a radio link failure recovery failure indication message to the child node;

not send any message to said child node;

Start the first wireless link failure recovery waiting timer, determine that the first wireless link failure recovery waiting timer expires, send a wireless link failure recovery failure indication message to the child node, or start the first wireless link failure Resume the waiting timer without sending any message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The method for notifying the state of a wireless link between nodes according to claim 8, wherein the parameter of the first wireless link failure recovery waiting timer is the default value specified in the protocol or the one accessed by the original parent IAB node. Configured by IAB donor.
The method for notifying the state of a wireless link between nodes according to claim 8, wherein the method further comprises:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, send a wireless link failure recovery indication message to the child node; or

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, the wireless link failure recovery instruction message is not sent to the child node.
A method for notifying the state of a wireless link between nodes is characterized in that it is applied to a child node of an integrated access and return IAB node, including:

After receiving the wireless link failure detection instruction message sent by the IAB node, receiving the wireless link status information sent by the IAB node, and determining whether to complete the wireless link recovery according to the wireless link status information.
The method for notifying the wireless link state between nodes according to claim 11, wherein the receiving the wireless link state information sent by the IAB node comprises:

receiving a wireless link failure recovery indication message sent by the IAB node; or

receiving routing reconfiguration information sent by the IAB node; or

Receive the wireless link failure recovery failure indication message sent by the IAB node.
The method for notifying the state of a wireless link between nodes according to claim 12, wherein before receiving the routing reconfiguration information sent by the IAB node, the method further comprises:

Receive the wireless link failure recovery indication message sent by the IAB node.
The method for notifying the state of a wireless link between nodes according to claim 11, wherein the method further comprises:

Start the second wireless link failure recovery waiting timer, if the second wireless link failure recovery waiting timer expires, and the wireless link failure recovery instruction message or routing reconfiguration information sent by the IAB node is not received, determine Wireless link recovery failed.
The method for notifying the state of a wireless link between nodes according to claim 14, wherein the parameter of the second wireless link failure recovery waiting timer is the default value specified in the protocol or the one accessed by the original mother IAB node. Configured by IAB donor.
An integrated access and return IAB node device, including memory, transceiver, processor; characterized in that:

The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:

In the case that the IAB node wireless link fails to recover, determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Based on the determined result information, determine whether to send wireless link state information to the child node.
The IAB node device according to claim 16, wherein the determining whether the parent node connected to the IAB node can route the data packet of the child node of the IAB node comprises:

When any of the following conditions is met, it is determined that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node;

Said conditions include:

The IAB node is rebuilt to the original mother IAB node before the wireless link failure occurs;

The IAB node is rebuilt to the parent IAB node of the same central control node distributed unit IAB donorDU as the original parent IAB node;

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donorDU, and the IAB node can perform cross-IAB donor DU transfer of data packets from the child nodes rerouting;

The IAB node is rebuilt to the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can re-route the data packets from the child nodes across the IAB donor CU;

The IAB node is rebuilt to the IAB donor DU accessed by the original parent IAB node;

The IAB node is rebuilt to a different IAB donor DU of the same central control node central unit IAB donor CU as the original mother IAB node, and the IAB node can reroute data packets from the child nodes across the IAB donor DU;

The IAB node is rebuilt to the IAB donor DU under the IAB donor CU of the central control node different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU.
The IAB node device according to claim 16 or 17, wherein when the result information is that the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node, the Based on the determined result information, determine whether to send wireless link state information to the child node, including any of the following:

Sending a wireless link failure recovery indication message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The IAB node device according to claim 18, wherein the operations further comprise:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, send a wireless link failure recovery indication message to the child node; or

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, the wireless link failure recovery instruction message is not sent to the child node.
The IAB node device according to claim 18, wherein, in the case of obtaining the routing reconfiguration information sent by the central control node IAB donor, sending the routing reconfiguration information to the child node includes:

When the IAB node is reconstructed to the IAB donor DU accessed by the original parent IAB node, the IAB donor DU different from the original parent IAB node, and other parent IAB nodes different from the original parent IAB node, the IAB node Wait for the routing reconfiguration information sent by the IAB donor;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The IAB node device according to claim 16 or 17, wherein the operations further comprise:

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, sending a wireless link failure recovery failure indication message to the child node; or

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a parent IAB under the central control node central unit IAB donor CU different from the original parent IAB node In the case of a node, no message is sent to said child node; or

In the case that the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU, send a wireless link failure recovery failure indication message to the child node; or

When the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU, no message is sent to the child node.
The IAB node device according to claim 18, wherein the operations further comprise:

In the case where the IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donor DU, and the IAB node is capable of rerouting across IAB donor DUs, the The IAB node performs inter donor DU rerouting on data packets from child nodes;

When the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node performs data packets from the child node inter donor CU rerouting;

The IAB node is rebuilt to the same central control node central unit IAB donor CU and different IAB donor DU as the original mother IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor DU In this case, the IAB node performs inter donor DU rerouting on data packets from child nodes;

The IAB node is rebuilt to the IAB donor DU under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU In the case of , the IAB node performs inter donor CU rerouting on the data packet from the child node.
The IAB node device according to claim 16 or 17, wherein, when the determined result information is that the parent node connected to the IAB node cannot route the packet of the child node of the IAB node, The determining whether to send wireless link state information to the child node based on the result information includes any of the following:

Sending a radio link failure recovery failure indication message to the child node;

not send any message to said child node;

Start the first wireless link failure recovery waiting timer, determine that the first wireless link failure recovery waiting timer expires, send a wireless link failure recovery failure indication message to the child node, or start the first wireless link failure Resume the waiting timer without sending any message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The IAB node device according to claim 23, wherein the parameter of the first radio link failure recovery waiting timer is a default value specified in the protocol or configured by an IAB donor accessed by the original parent IAB node.
The IAB node device according to claim 23, wherein the operations further comprise:

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, send a wireless link failure recovery indication message to the child node; or

Before obtaining the routing reconfiguration information sent by the central control node IAB donor, the wireless link failure recovery instruction message is not sent to the child node.
A sub-node device integrating access and return IAB nodes, including a memory, a transceiver, and a processor; it is characterized in that:

The memory is used to store computer programs; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:

After receiving the wireless link failure detection instruction message sent by the IAB node, receiving the wireless link status information sent by the IAB node, and determining whether to complete the wireless link recovery according to the wireless link status information.
The sub-node device of the IAB node according to claim 26, wherein the receiving the wireless link state information sent by the IAB node comprises:

receiving a wireless link failure recovery indication message sent by the IAB node; or

receiving routing reconfiguration information sent by the IAB node; or

Receive the wireless link failure recovery failure indication message sent by the IAB node.
The sub-node device of the IAB node according to claim 27, wherein before receiving the routing reconfiguration information sent by the IAB node, the operation further includes:

Receive the wireless link failure recovery indication message sent by the IAB node.
The child node device of the IAB node according to claim 26, wherein the operations further comprise:

Start the second wireless link failure recovery waiting timer, if the second wireless link failure recovery waiting timer expires, and the wireless link failure recovery instruction message or routing reconfiguration information sent by the IAB node is not received, determine Wireless link recovery failed.
The child node device of the IAB node according to claim 29, wherein the parameter of the second wireless link failure recovery waiting timer is a default value specified by the protocol or an IAB donor configuration accessed by the original mother IAB node of.
A notification device for wireless link status between nodes is characterized in that it is applied to integrated access and backhaul IAB nodes, including:

A determining unit, configured to determine whether the parent node connected to the IAB node can route the data packets of the child nodes of the IAB node when the IAB node wireless link fails to recover;

A sending unit, configured to determine whether to send wireless link state information to the child node based on the determined result information.
The device for notifying the state of the wireless link between nodes according to claim 31, wherein the determining unit is configured to determine that the parent node connected to the IAB node is able to communicate with the The data packet of the child node of the above-mentioned IAB node is routed;

Said conditions include:

The IAB node is rebuilt to the original mother IAB node before the wireless link failure occurs;

The IAB node is rebuilt to the parent IAB node of the same central control node distributed unit IAB donorDU as the original parent IAB node;

The IAB node is rebuilt to the same central control node central unit IAB donor CU as the original parent IAB node, and a parent IAB node with a different IAB donorDU, and the IAB node can perform cross-IAB donor DU transfer of data packets from the child nodes rerouting;

The IAB node is rebuilt to the parent IAB node under the central control node central unit IAB donor CU different from the original parent IAB node, and the IAB node can re-route the data packets from the child nodes across the IAB donor CU;

The IAB node is rebuilt to the IAB donor DU accessed by the original parent IAB node;

The IAB node is rebuilt to a different IAB donor DU of the same central control node central unit IAB donor CU as the original mother IAB node, and the IAB node can reroute data packets from the child nodes across the IAB donor DU;

The IAB node is rebuilt to the IAB donor DU under the IAB donor CU of the central control node different from the original parent IAB node, and the IAB node can reroute the data packets from the child nodes across the IAB donor CU.
The device for notifying the wireless link state between nodes according to claim 31 or 32, wherein the result information is that the parent node connected to the IAB node can perform data packets of the child nodes of the IAB node In case of routing, the sending unit is used for any of the following:

Sending a wireless link failure recovery indication message to the child node;

In the case of obtaining the routing reconfiguration information sent by the central control node IAB donor, send the routing reconfiguration information to the child node.
The device for notifying the state of the wireless link between nodes according to claim 33, wherein the device further comprises: a first message unit;

The first message unit is configured to send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor; or

The first message unit is configured to not send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor.
The device for notifying the state of the wireless link between nodes according to claim 33, wherein the sending unit is used to reconstruct the IAB donor DU accessed by the original mother IAB node at the IAB node, and the original mother IAB node. In the case that the IAB node does not have the same IAB donor DU, and other parent IAB nodes different from the original parent IAB node, the IAB node waits for the routing reconfiguration information sent by the IAB donor;

The sending unit is configured to send the routing reconfiguration information to the child node when the routing reconfiguration information sent by the central control node IAB donor is obtained.
The device for notifying the state of the wireless link between nodes according to claim 31 or 32, wherein the device further comprises: a second message unit;

The second message unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a central control node different from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, send a wireless link failure recovery failure indication message to the child node; or

The second message unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU as the original parent IAB node, a parent IAB node with a different IAB donor DU, or a central control node different from the original parent IAB node In the case of the parent IAB node under the central unit IAB donor CU, do not send any message to the child node; or

The second message unit is used to send to the child node when the IAB node is rebuilt to other IAB donor DUs of the same IAB donor CU as the original parent IAB node or IAB donor DUs under other IAB donor CUs A wireless link failure recovery failure indication message; or

The second message unit is used to not send a message to the child node when the IAB node is rebuilt to another IAB donor DU of the same IAB donor CU as the original parent IAB node or an IAB donor DU under another IAB donor CU. Send any message.
The device for notifying the status of wireless links between nodes according to claim 33, wherein the device further comprises: a rerouting unit;

The rerouting unit is used to rebuild the IAB node to the parent IAB node of the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can perform cross-IAB donorDU rerouting In the case of routing, the IAB node performs inter donorDU rerouting on data packets from child nodes;

The rerouting unit is configured to, when the IAB node is rebuilt to a parent IAB node under a different IAB donor CU from the original parent IAB node, and the IAB node can perform inter donor CU rerouting, the IAB node Inter donor CU rerouting for data packets from child nodes;

The rerouting unit is used to rebuild the IAB node to the same central control node central unit IAB donor CU and different IAB donor DU as the original parent IAB node, and the IAB node can process data packets from the child nodes In the case of cross-IAB donor DU rerouting, the IAB node performs inter donor DU rerouting on data packets from child nodes;

The rerouting unit is used to rebuild the IAB donorDU under the IAB donor CU of the central control node different from the original mother IAB node at the IAB node, and the IAB node can perform data packets from the child node In the case of cross-IAB donor CU rerouting, the IAB node performs inter donor CU rerouting on data packets from child nodes.
The device for notifying the wireless link state between nodes according to claim 31 or 32, wherein the determined result information is that the parent node connected to the IAB node cannot receive data packets from the child nodes of the IAB node. In the case of routing, the sending unit is used for any of the following:

Sending a radio link failure recovery failure indication message to the child node;

not send any message to said child node;

Start the first wireless link failure recovery waiting timer, determine that the first wireless link failure recovery waiting timer expires, send a wireless link failure recovery failure indication message to the child node, or start the first wireless link failure Resume the waiting timer without sending any message to the child node;

When the routing reconfiguration information sent by the central control node IAB donor is obtained, the routing reconfiguration information is sent to the child node.
The device for notifying the state of the wireless link between nodes according to claim 38, wherein the parameter of the first wireless link failure recovery waiting timer is the default value specified in the protocol or the value accessed by the original parent IAB node. Configured by IAB donor.
The device for notifying the state of the wireless link between nodes according to claim 38, wherein the device further comprises: a third message unit;

The third message unit is configured to send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor; or

The third message unit is configured to not send a wireless link failure recovery instruction message to the child node before obtaining the routing reconfiguration information sent by the central control node IAB donor.
A notification device for wireless link status between nodes is characterized in that it is applied to sub-nodes of integrated access and return IAB nodes, including:

The receiving unit is configured to receive the wireless link status information sent by the IAB node after receiving the wireless link failure detection indication message sent by the IAB node, and determine whether to complete the wireless link recovery according to the wireless link status information .
The device for notifying the state of a wireless link between nodes according to claim 41, wherein the receiving unit is configured to receive a wireless link failure recovery indication message sent by the IAB node; or

The receiving unit is configured to receive the routing reconfiguration information sent by the IAB node; or

The receiving unit is configured to receive a radio link failure recovery failure indication message sent by the IAB node.
The device for notifying the state of the wireless link between nodes according to claim 42, wherein the receiving unit is further configured to receive a wireless link failure recovery indication message sent by the IAB node.
The device for notifying the state of the wireless link between nodes according to claim 41, wherein the device further comprises: a timing unit;

The timing unit is configured to start a second radio link failure recovery waiting timer;

If the second radio link failure recovery waiting timer expires, and the radio link failure recovery indication message or routing reconfiguration information sent by the IAB node is not received, the timing unit is configured to determine that the radio link recovery fails .
The device for notifying the state of the wireless link between nodes according to claim 44, wherein the parameter of the second wireless link failure recovery waiting timer is the default value specified in the protocol or the one accessed by the original parent IAB node. Configured by IAB donor.
A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the node described in any one of claims 1 to 10 The notification method of the wireless link status between them.
A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the node described in any one of claims 11 to 15 The notification method of the wireless link status between them.