WO2021258783A1

WO2021258783A1 - Method and device for cell selection

Info

Publication number: WO2021258783A1
Application number: PCT/CN2021/080307
Authority: WO
Inventors: 王达; 曾二林; 孙建成
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-06-22
Filing date: 2021-03-11
Publication date: 2021-12-30
Also published as: CN113905421A; CN113905421B

Abstract

Disclosed in the present disclosure are a method and device for cell selection, which are used to solve the problem in the prior art in which during cell selection or cell reselection, IAB nodes make backhaul links of the IAB nodes form a loop, and the nodes in the loop cannot work normally. The method comprises: during the process of performing cell selection or cell reselection, a first node selects a second node according to node information used for determining descendant nodes of the first node in an IAB network, and the first node accesses the second node. Since the second node accessed by the first node is selected according to the node information used for determining the descendant nodes of the first node in the IAB network, it is possible to prevent the first node from accessing the descendant nodes of the first node, so that the backhaul links form a loop, and then the robustness with which the IAB nodes transmit data may be improved.

Description

Method and equipment for cell selection

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 22, 2020, the application number is 202010573453.9, and the application name is "a method and equipment for cell selection", the entire content of which is incorporated into this application by reference middle.

Technical field

The present disclosure relates to the field of wireless communication technology, and in particular to a method and device for cell selection.

Background technique

Integrated Access and Backhaul (IAB) network technology achieves the purpose of expanding the coverage of base stations by relaying wireless signals between multiple nodes. IAB network technology is a network networking mode for the future 5th Generation (5G) to solve the problem of base station coverage.

In the IAB network, on the one hand, when an IAB node and its parent node have a radio link failure (radio link failure, RLF), the IAB node will notify its child nodes so that the child nodes can re-select other base stations or IAB nodes to access. That is, cell reselection is performed to restore the access and backhaul links of the child node; on the other hand, when the IAB node is not connected to other nodes, in order to form a backhaul link, the IAB node needs to access other nodes. That is, cell selection is performed.

In the process of cell selection or cell reselection by the IAB node, the backhaul link of the IAB node may form a loop and cannot work normally.

Summary of the invention

The present disclosure provides a method and equipment for cell selection to solve the problem that the IAB node in the prior art makes the backhaul link of the IAB node form a loop during cell selection or cell reselection, and the nodes in the loop cannot be normal The problem of work.

Based on the foregoing problems, in the first aspect, embodiments of the present disclosure provide a method for cell selection, and the method includes:

In the process of cell selection or cell reselection, the first node selects the second node from the IAB network according to the node information used to determine the descendants of the first node in the IAB network;

The first node accesses the second node.

Optionally, the node information includes identifier (ID) information and/or hop count information, where the hop count information is the hop count from the descendant node to the host node or the central control node in the IAB network information;

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

The adaptive backhaul protocol (Backhaul Adaptation Protocol, BAP) address information of the descendant nodes.

Optionally, before the first node selects the second node from the IAB network, the method further includes:

The ID information is determined by at least one of the following methods:

The first node receives ID information configured by an IAB donor node (IAB donor) or an operation and maintenance management (Operation Administration and Maintenance, OAM) device in the IAB network;

The first node obtains the ID information from the received broadcast information of the node in the IAB network;

Receiving, by the first node, ID information reported by the descendant nodes of the first node;

The hop count information is determined by at least one of the following methods:

Receiving, by the first node, hop count information configured by an IAB donor or OAM device in the IAB network;

Receiving, by the first node, the hop count information of the parent node of the first node;

The first node obtains the hop count information from the received broadcast information of the node in the IAB network.

Optionally, if the descendant nodes of the first node in the IAB network change, the ID information of the IAB donor or OAM device configuration in the IAB network received by the first node includes the changed descendant node Information or information of all descendant nodes of the first node.

Optionally, the method further includes:

The first node reports the ID information of the first node to the parent node of the first node; and/or

The first node sends the broadcast information of the first node.

Optionally, if the descendant nodes of the first node in the IAB network change, the ID information of the first node reported by the first node to the parent node includes information about the changed descendant node or Information of all descendants of the first node.

Optionally, the broadcast information includes the hop count information;

Before the first node sends the broadcast information of the first node, the method further includes:

The first node determines the hop count information of the first node according to the hop count information of the parent node.

Optionally, the selection of the second node by the first node from the IAB network includes:

Determining, by the first node, a set of candidate nodes in the IAB network according to the node information of the descendant nodes;

The first node selects a second node from the set of candidate nodes.

Optionally, the first node determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes includes:

According to the node information of the descendant nodes, the first node composes the determined nodes other than the descendant nodes in the IAB network into a candidate node set; or

The first node determines, according to the node information of the descendant nodes, the nodes in the IAB network other than the descendant nodes that meet the power requirements, and composes the determined nodes into a candidate node set.

Optionally, the first node determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes further includes:

If there is no node that meets the power requirement among the nodes in the IAB network other than the descendant nodes, send an RLF notification to the child nodes of the first node, and select the descendant nodes of the first node to meet the power requirements. Nodes with power requirements form a set of candidate nodes.

Optionally, determine nodes that meet power requirements in the following ways:

Judging whether there is a node whose received power is greater than the first power threshold;

If yes, take the node whose received power is greater than the first power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the first power threshold as a node that meets the power requirements, the first power threshold is lowered, and the step of determining whether there is a node with a received power greater than the first power threshold is returned to the step of determining whether there is a node with a received power greater than the first power threshold, until the lowered first The power threshold is less than the set minimum power threshold.

Optionally, before the first node selects the second node from the IAB network according to the node information in the IAB network, the method further includes:

After receiving the RLF notification sent by the parent node of the first node, the first node determines that cell reselection is required.

Optionally, the node information includes the hop count information;

The first node determining the set of candidate nodes in the IAB network according to the node information of the first node includes:

The first node selects, from the IAB network, nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set; or

The first node determines from the IAB network that the corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirement, and the determined nodes form a candidate node set.

Optionally, the first node determining the set of candidate nodes in the IAB network according to the node information of the first node further includes:

If there is no node meeting the power requirement among the nodes whose corresponding hop information is less than or equal to the hop information of the first node in the IAB network, send an RLF notification to the child nodes of the first node, and send an RLF notification from the Nodes that meet the power requirements are selected from the descendant nodes of the first node to form a set of candidate nodes.

Optionally, determine nodes that meet power requirements in the following ways:

Determine whether there is a node whose received power is greater than the second power threshold;

If yes, use the node whose received power is greater than the second power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the second power threshold as a node that meets the power requirements, the second power threshold is lowered, and the step of determining whether there is a node with a received power greater than the second power threshold is returned to the step of determining whether there is a node with a received power greater than the second power threshold, until the lowered second The power threshold is less than the set minimum power threshold.

Optionally, the first node selecting the second node from the candidate node set includes:

The first node selects a node with the smallest hop count information and/or the largest received power from the set of candidate nodes as the second node.

Optionally, before the first node selects the second node from the IAB network according to the node information of the first node in the IAB network, the method further includes:

After determining that the hop number information of the parent node is greater than the hop number information of the first node, the first node determines that cell reselection is required.

In a second aspect, embodiments of the present disclosure provide a device for cell selection, the device including: a processor, a memory, and a transceiver;

Wherein, the processor is configured to read the program in the memory and execute:

In the process of cell selection or cell reselection, selecting a second node from the IAB network according to the node information used to determine the descendant nodes of the first node in the IAB network;

Access to the second node.

Optionally, the node information includes ID information and/or hop count information, where the hop count information is hop count information from the descendant node to the host node or the central control node in the IAB network;

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

BAP address information of the descendant nodes.

Optionally, the processor is further configured to:

Before selecting the second node from the IAB network, determine the ID information by at least one of the following methods:

Receiving ID information configured by an IAB donor or OAM device in the IAB network;

Acquiring the ID information from the received broadcast information of the node in the IAB network;

Receiving ID information reported by the descendant nodes of the first node;

Receiving the hop count information configured by the IAB donor or OAM device in the IAB network;

Receiving hop information of the parent node of the first node;

Obtain the hop count information from the received broadcast information of the node in the IAB network.

Optionally, the processor is further configured to:

Reporting the ID information of the first node to the parent node of the first node; and/or

Sending the broadcast information of the first node.

Optionally, the broadcast information includes the hop count information; the processor is further configured to:

Before sending the broadcast information of the first node, determine the hop count information of the first node according to the hop count information of the parent node.

Optionally, the processor is specifically configured to:

Determining a set of candidate nodes in the IAB network according to the node information of the descendant nodes;

Select a second node from the set of candidate nodes.

Optionally, the processor is specifically configured to:

According to the node information of the descendant nodes, the determined nodes in the IAB network other than the descendant nodes are formed into a candidate node set; or

According to the node information of the descendant nodes, determine nodes in the IAB network that meet the power requirements except for the descendant nodes, and compose the determined nodes into a candidate node set.

Optionally, the processor is further configured to:

When determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes, if there is no node that meets the power requirements among the nodes in the IAB network except the descendant nodes, the first node The child node of sends an RLF notification, and selects nodes that meet the power requirements from the descendants of the first node to form a set of candidate nodes.

Optionally, the processor determines a node that meets the power requirement in the following manner:

Optionally, the processor is further configured to:

According to the node information in the IAB network, before selecting the second node from the IAB network, after receiving the RLF notification sent by the parent node of the first node, it is determined that cell reselection is required.

Optionally, the node information includes the hop count information; the processor is specifically configured to:

From the IAB network, select nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set; or

It is determined from the IAB network that the corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirements, and the determined nodes are formed into a candidate node set.

Optionally, the processor is further configured to:

Determine the set of candidate nodes in the IAB network according to the node information of the first node, if the corresponding hop number information in the IAB network is less than or equal to the hop number information of the first node, there is no matching power The required node sends an RLF notification to the child nodes of the first node, and selects nodes that meet the power requirements from the descendant nodes of the first node to form a candidate node set.

Optionally, the processor is specifically configured to:

The node with the smallest hop count information and/or the largest received power is selected from the candidate node set as the second node.

Optionally, the processor is further configured to:

According to the node information of the first node in the IAB network, before selecting the second node from the IAB network, the first node determines that the hop information of the parent node is greater than the hop information of the first node, Determine the need for cell reselection.

In the third aspect, the embodiments of the present disclosure provide another cell selection device, including:

The selection module is configured to select a second node from the IAB network according to the node information used to determine the descendants of the first node in the IAB network during cell selection or cell reselection;

The access module is used to access the second node.

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

BAP address information of the descendant nodes.

Optionally, the device further includes a processing module, and before the selection module selects the second node from the IAB network, the processing module is specifically configured to:

The ID information is determined by at least one of the following methods:

Receiving ID information reported by the descendant nodes of the first node;

Receiving hop information of the parent node of the first node;

Optionally, the processing module is also used to:

Sending the broadcast information of the first node.

Optionally, the broadcast information includes the hop count information; the processing module is further configured to:

Optionally, the processing module is specifically used for:

Select a second node from the set of candidate nodes.

Optionally, the processing module is specifically used for:

Optionally, the processing module is also used to:

Optionally, the processing module determines a node that meets the power requirement in the following manner:

Optionally, the processing module is also used to:

Optionally, the node information includes the hop count information; the processing module is specifically configured to:

Optionally, the processing module is also used to:

Optionally, the processing module is specifically used for:

Optionally, the processing module is also used to:

In a fourth aspect, embodiments of the present disclosure provide a computer storable medium on which a computer program is stored, and when the program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

Since the embodiment of the present disclosure provides a method for selecting the second node in the IAB network based on the node information used to determine the descendant nodes of the first node in the IAB network, and then the first node accesses the second node, it can prevent the first node from being connected to the second node. A node is connected to the descendant nodes of the first node, so that the backhaul link forms a loop, thereby improving the robustness of data transmission by the IAB node.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative labor, other drawings can be obtained from these drawings.

Figure 1 is a schematic diagram of the IAB network topology;

Figure 2 is a schematic diagram of the IAB node structure;

Figure 3 is a schematic diagram of IAB node 1 accessing descendant nodes;

4 is a schematic flowchart of a cell selection method provided by an embodiment of the disclosure;

FIG. 5 is a schematic diagram of a set of candidate nodes provided by an embodiment of the disclosure;

FIG. 6 is a schematic flowchart of a second cell selection method provided by an embodiment of the disclosure;

FIG. 7 is a schematic flowchart of a third cell selection method provided by an embodiment of the disclosure;

FIG. 8 is a schematic flowchart of a fourth cell selection method provided by an embodiment of the disclosure;

FIG. 9 is a schematic flowchart of a fifth cell selection method provided by an embodiment of the disclosure;

FIG. 10 is a schematic flowchart of a sixth cell selection method provided by an embodiment of the disclosure;

FIG. 11 is a schematic structural diagram of a cell selection device provided by an embodiment of the disclosure;

FIG. 12 is a schematic structural diagram of another cell selection device provided by an embodiment of the disclosure.

detailed description

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. . Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

The "and/or" in the embodiments of the present disclosure describes the association relationship of the associated objects, and means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. These three situations. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiments of the present disclosure, "determining B according to A" does not mean that B is determined only according to A, and B can also be determined according to A and other information. "A includes B" does not mean that A only includes B. A may also include other information, such as C, D, etc.

In addition, in the embodiments of the present disclosure, the word "exemplary" is used to mean serving as an example, illustration, or illustration. Any embodiment or design solution described as an "example" in this disclosure should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, the term example is used to present the concept in a concrete way.

In the embodiments of the present disclosure, information (information), signal (signal), message (message), and channel (channel) can sometimes be mixed. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized. "的 (of)", "corresponding (relevant)" and "corresponding (corresponding)" can sometimes be used together. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized.

The network architecture and business scenarios described in the embodiments of the present disclosure are intended to illustrate the technical solutions of the embodiments of the present disclosure more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

To facilitate the understanding of the embodiments of the present disclosure, first, the IAB network topology diagram shown in FIG. 1 is taken as an example to describe in detail the scenarios applicable to the embodiments of the present disclosure.

As shown in Figure 1, in the deployment of an IAB network, it consists of an IAB donor (IAB host node or central control node), IAB node (node), and user equipment (UE). The IAB donor is used to connect to the core network, return the information of the IAB node and UE to the core network, and transmit the information of the core network to the IAB node and UE. The IAB donor is also responsible for managing the IAB nodes in the entire IAB network.

The IAB node relays the UE's information to the IAB donor through the radio link (Uu interface), and relays the IAB donor's information to the UE. Between the IAB nodes, and between the IAB node and the IAB donor are connected through a wireless link, that is, the Uu interface.

The relay function of the IAB node is implemented through the BAP layer (Backhaul Adaptation Protocol layer) in the IAB node.

As shown in Figure 1, in the IAB network, IAB node 1 is the parent node of IAB node 2, IAB node 3 is the child node of IAB node2, and IAB node 3 is the descendant node of IAB node1. It can also be seen from Figure 1 that IAB node 2 is an upper-level node directly connected to IAB node 1, IAB node 3 is a lower-level node directly connected to IAB node2, and IAB node 3 is a lower-level node that is indirectly connected to IAB node2.

In the existing IAB network topology, an IAB node consists of two parts. As shown in Figure 2, one part is an IAB mobile terminal (Mobile Termination, MT) pair connected to the base station or the DU part of the IAB node. The base station or IAB The node is called its parent node; the other part is the MT part of the IAB DU (IAB Distributed Unit) pair connected to the UE or IAB node, and the UE or IAB MT node is called its child node.

For the existing 5G Uu interface, when the link between the UE and the network is interrupted, the UE determines that the link between it and the network has RLF. Similar to the Uu interface, the link between the IAB node and its parent node is interrupted, and the IAB node determines that the link between its parent node has RLF, and the IAB node sends RLF notification information to its child nodes to notify An RLF has occurred between its child node and the parent node, and it can no longer continue to provide access and backhaul services for its child node.

After the child node receives the RLF notification information sent by its parent node, it will perform cell reselection to select other IAB nodes for access and perform subsequent service transmissions.

In the process of cell reselection, the IAB child nodes may choose their own descendants, which makes the IAB network topology graph form a loop, and the information of the IAB nodes in the loop cannot be normally transmitted to the IAB donor node, that is The IAB node in the loop cannot work normally.

For example, as shown in Figure 3, it is a schematic diagram of IAB node 1 accessing descendant nodes. As can be seen from Figure 3, IAB node 3 is a descendant node of IAB node 1, IAB node 3 is connected to IAB node 2, IAB node 2 is connected to IAB node 1, if IAB node 1 is connected to IAB node 3, Then IAB node 1, IAB node 2, and IAB node 3 form a loop, as shown by the dotted arrow in Figure 3, IAB node 1, IAB node 2, and IAB node 3 cannot work normally.

Based on the foregoing problems, embodiments of the present disclosure provide a cell selection method. As shown in FIG. 4, the method includes:

S401: During the cell selection or cell reselection process, the first node selects a second node from the IAB network according to node information used to determine the descendants of the first node in the IAB network;

S402. The first node accesses the second node.

Among them, the first node performs cell selection, that is, the first node has not been connected to any node in the IAB network before. When the first node needs to connect to a node in the IAB network, cell selection needs to be performed; the first node performs cell reselection , That is, the first node has previously connected to a node in the IAB network. For some reason, the first node is disconnected from the node. At this time, the first node needs to perform cell reselection. For example, after receiving the RLF notification sent by the parent node of the first node, the first node determines that cell reselection is required.

In the embodiment of the present disclosure, the node information of the descendant nodes of the first node may include ID information and/or hop count information. It should be noted that the hop count information is the hop count information from the node in the IAB network to the IAB donor.

For example, if the first node reaches the IAB donor through N other IAB nodes, the hop count information of the first node is N+1, that is, the hop count of the IAB donor is 0, and the hop count of the IAB node directly connected to the IAB donor is 1.

The ID information here may be part or all of the following information: cell information, address information, and BAP address information, that is, cell information of descendant nodes, address information of descendant nodes, and BAP address information of descendant nodes.

The ID information is used to determine whether a node in the IAB network is a descendant of the first node.

Specifically, the embodiment of the present disclosure may determine ID information in at least one of the following ways:

The first node receives ID information configured by the IAB donor or OAM device in the IAB network;

The first node obtains ID information from the received broadcast information of the node in the IAB network;

The first node receives the ID information reported by the descendant nodes of the first node.

In other words, the IAB donor or OAM device in the IAB network can configure the ID information of the first node’s descendants for the first node, and the first node can also obtain the ID information of the first node’s descendants from the received broadcast information. , The first node may also receive the ID information reported by the descendant nodes of the first node.

The OAM device here is a central control node. In the embodiments of the present disclosure, except for the OAM device, any central control node that can configure ID information for the first node is applicable to the embodiments of the present disclosure.

It should be noted that the first node receives the ID information reported by the descendants of the first node, and can report it level by level. For example, as shown in Figure 1, the descendants of IAB node 1 IAB node 3 report the ID information to IAB node 2, IAB node 2 reports the received ID information of IAB node 3 to IAB node 1.

The embodiments of the present disclosure may determine the hop count information in at least one of the following ways:

The first node receives the hop count information configured by the IAB donor or OAM device in the IAB network;

The first node receives the hop count information of the parent node of the first node;

The first node obtains the hop count information from the received broadcast information of the nodes in the IAB network.

It should be noted that when the first node receives the hop number information of the parent node of the first node, the first node adds the hop number information of the received parent node to 1, which is the hop number information of the first node.

In an optional implementation manner, in the IAB network, nodes may be updated, for example, a new node joins or a node leaves. When the first node determines the ID information of the descendant nodes of the first node according to the received ID information configured by the IAB donor or OAM device, if the descendant nodes of the first node change, for example, a new descendant node joins, or If the descendant node leaves, the first node can update the node information of the descendant nodes of the first node according to the ID information configured by the IAB donor or OAM device for the first node. The incremental method can be adopted, that is, the IAB donor or OAM device is the first node. The ID information of the node configuration includes the node information of the descendant nodes that have changed, and the full set sending method can also be used, that is, the ID information configured for the first node by the IAB donor or OAM device includes the information of all descendant nodes of the first node .

For example, in the IAB network, node 1, node 2, and node 3 are the descendants of the first node. When node 4 is added to the IAB network, and node 4 is the descendant of the first node, the IAB donor can Reconfigure the ID information of the descendant nodes of the first node for the first node. The ID information may include the ID information of node 4, the ID information of node 1, the ID information of node 2, the ID information of node 3, and the node 4 ID information.

In a possible implementation manner, the first node may also report the ID information of the first node to the parent node of the first node, so that the parent node of the first node saves the ID information of the first node; and/or the first node The node may also send the broadcast information of the first node, so that other nodes in the IAB network receive the broadcast information of the first node, and obtain the ID information of the first node from the broadcast information.

When the first node reports the ID information of the first node to the parent node of the first node, if the descendant nodes of the first node in the IAB network change, for example, a new descendant node joins, or a descendant node leaves, then A node needs to re-send ID information to the parent node. The ID information may include the information of the descendant nodes that have changed, and may also include the information of all descendant nodes of the first node.

If the broadcast information of the first node sent by the first node includes hop count information, before the first node sends the broadcast information of the first node, the first node can determine the hop count information of the first node according to the hop count information of the parent node .

In a possible implementation, when the first node selects the second node from the IAB network, the first node may first determine the set of candidate nodes in the IAB network according to the node information of the descendant nodes of the first node, and then the first node The node selects the second node from the set of candidate nodes.

In specific implementation, the first node can determine the candidate node set in the following two ways, which will be described separately below.

Manner 1: The first node determines nodes other than the descendant nodes in the IAB network according to the node information of the descendant nodes of the first node, and uses the determined nodes as a set of candidate nodes.

For example, as shown in Figure 5, there are 13 IAB nodes in the IAB network, among which node 7, node 8, node 9, and node 10 are descendants of node 2, and the determined candidate node set of node 2 is {Node 1 , Node 3, node 6, node 11, node 12}.

Manner 2: According to the node information of the descendant nodes of the first node, the first node determines the nodes in the IAB network other than the descendant nodes and meets the power requirements, and composes the determined nodes into a set of candidate nodes.

Specifically, in the embodiment of the present disclosure, to determine whether a node meets the power requirement, it can first determine whether there is a node with a received power greater than a first power threshold in the IAB network, and if there is, a node with a received power greater than the first threshold is regarded as the power-compliant node. The requested node; if there is no node whose received power is greater than the first power threshold, lower the first power threshold, and continue to determine the node whose received power is greater than the reduced first power threshold until the reduced first power threshold is less than the set value The minimum power threshold.

Wherein, the first power threshold may be a threshold that is artificially set; reducing the first power threshold may be reduced according to a preset value.

Correspondingly, if there is no node in the IAB network other than the descendants of the first node that meets the power requirements, the first node can send an RLF notification to the child nodes of the first node to disconnect the first node and the first node. The connection between the child nodes of a node, and then select nodes that meet the power requirements from the descendant nodes of the first node to form a set of candidate nodes.

Since the connection between the first node and the child nodes of the first node is broken, the first node selects the second node that needs to be accessed from the descendant nodes of the first node, and a loop will not be formed.

In addition to the method for determining the set of candidate nodes given above, when the node information includes hop count information, the following two methods (method 3 and method 4) can also be used to determine the candidate node set.

Manner 3: The first node selects from the IAB network nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set.

As mentioned earlier, the hop count information is the hop count information from the node in the IAB network to the IAB donor. The hop count information is less than or equal to the hop count information of the first node, that is, the upper node of the first node, excluding the first node Descendants of nodes.

It should be noted that the hop count information can be carried in the node's broadcast information.

Manner 4: The first node selects from the IAB network the nodes whose corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirements, and the determined nodes form a set of candidate nodes.

The nodes that meet the power requirements can be determined in the following way. First, determine whether there are nodes in the IAB network whose received power is greater than the second power threshold. If so, the nodes whose received power is greater than the second power threshold are regarded as nodes that meet the power requirements; if not, the first node can be reduced according to the preset value. Second, the power threshold, and then return to the step of judging whether there is a node whose received power is greater than the reduced second power threshold, until the reduced second power threshold is less than the preset minimum power threshold.

It should be noted that the second power threshold here and the first power threshold in the second manner may be the same or different, and the implementation of the present disclosure does not limit it.

After the candidate node set is determined, the first node can select the node with the smallest hop count information from the determined candidate node set as the second node, or the node with the largest received power as the second node, or choose the smallest hop count information , And the node with the largest received power is used as the second node, and a node may be randomly selected from the determined candidate node set as the second node.

In a possible implementation manner, the first node determines to perform cell reselection after determining that the hop number information of the parent node of the first node is greater than the hop number information of the first node.

In the embodiment of the present disclosure, in the process of cell selection or cell reselection, the first node selects the second node according to the node information used to determine the descendant nodes of the first node in the IAB network, and the first node accesses the second node . Since the second node accessed by the first node is selected based on the node information used to determine the descendant nodes of the first node in the IAB network, it is possible to prevent the first node from accessing the descendant nodes of the first node and make the backhaul chain The path forms a loop, which can improve the robustness of data transmission by the IAB node.

For ease of understanding, the cell selection method in the present disclosure is described below through specific embodiments.

Example 1:

As shown in FIG. 6, it is a schematic flowchart of a cell selection method disclosed in an embodiment of the present disclosure.

S601: The first IAB node receives ID information of the descendant nodes of the first IAB node.

S602: The first IAB node receives RLF notification information sent by the parent node of the first IAB node.

S603: The first IAB node judges whether there are other IAB nodes other than the descendant nodes of the first IAB node according to the ID information of the descendant nodes of the first node, if so, execute S604, otherwise execute S605;

S604: The first IAB node selects other IAB nodes for access except the descendant nodes of the first IAB node.

S605: The first IAB node sends RLF notification information to the child nodes of the first IAB node.

S606: The first IAB node selects any IAB node in the IAB network for access.

Example 2:

As shown in FIG. 7, it is a schematic flowchart of another cell selection method disclosed in an embodiment of the present disclosure.

S701: The first IAB node receives ID information of the descendant nodes of the first IAB node.

S702: The first IAB node receives RLF notification information sent by the parent node of the first IAB node.

S703: The first IAB node judges whether there is a node whose received power is greater than the power threshold, if so, execute S704, otherwise execute S707;

S704: The first IAB node uses a node with a received power greater than a power threshold as a set of candidate nodes.

S705. The first IAB node judges whether there are other IAB nodes in the candidate node set except the descendant nodes of the first IAB node according to the ID information of the descendant nodes of the first node, if so, execute S706, otherwise execute S709;

S706: The first IAB node selects from the set of candidate nodes an IAB node other than the descendant nodes of the first IAB node for access;

It should be noted that the other IAB node selected in S706 may be the node with the smallest hop information among other IAB nodes selected from the candidate node set except the descendant nodes of the first IAB node, and may be the node with the largest received power. It can be the node with the smallest hop information and the largest received power, or a node randomly selected.

S707. The first IAB node reduces the power threshold.

S708. The first IAB node judges whether the reduced power threshold is less than or equal to the minimum power threshold, if yes, execute S709, otherwise execute S703;

S709: The first IAB node sends RLF notification information to the child nodes of the first IAB node.

S710. The first IAB node selects a node with a received power greater than a power threshold from the IAB network.

It should be noted that the node with the received power greater than the power threshold in the IAB network selected in S710 may be the node with the smallest hop information among the nodes with the received power greater than the power threshold in the IAB network, and it may be the node with the received power greater than the power in the IAB network. Among the nodes with the threshold, the node with the largest received power can be the node with the smallest hop information and the largest received power among the nodes with the received power greater than the power threshold in the IAB network, or a random node in the IAB network with the received power greater than the power threshold. A selected node.

Example 3:

As shown in FIG. 8, it is a schematic flowchart of another cell selection method provided by an embodiment of the present disclosure.

S801. The first IAB node confirms the hop count information of the first IAB node.

The first IAB node +1 receives the hop count information of the parent node of the first IAB node, which is the hop count information of the first IAB node.

S802: The first IAB node receives RLF notification information sent by the parent node of the first IAB node.

S803: The first IAB node judges whether there is an IAB node in the IAB network whose hop count information is less than or equal to the hop count information of the first IAB node, if yes, execute S804, otherwise, execute S809;

S804: The first IAB node selects an IAB node whose hop count information is less than or equal to the hop count information of the first IAB node.

S805: The first IAB node judges whether the selected IAB node has at least one IAB node with the smallest hop count information, if yes, execute S806, otherwise, execute S807;

S806: The first IAB node selects one node from at least one IAB node with the smallest hop count information for access.

In S806, the first IAB node may randomly select a node with the smallest hop information from at least one node with the smallest hop information for access, and may also select a node with the smallest hop information and the largest received power for access;

S807: The first IAB node randomly selects a node for access;

In S807, the first node can randomly select a node from the selected nodes for access, and can also select a node with the largest received power for access;

S808. Optionally, the first IAB node judges whether the hop count information of the parent node of the first IAB node is greater than the hop count information of the first IAB node, and if so, execute S803, otherwise end;

S809: The first IAB node sends RLF notification information to the child nodes of the first IAB node.

S810: The first IAB node selects any node in the IAB network for access.

Example 4:

As shown in FIG. 9, it is a schematic flowchart of another cell selection method provided by an embodiment of the present disclosure.

S901. The first IAB node determines the hop count information of the first IAB node.

S902: The first IAB node receives RLF notification information sent by the parent node of the first IAB node.

S903: The first IAB node judges whether there is a node whose received power is greater than the power threshold, if yes, execute S904, otherwise execute S911;

S904: The first IAB node uses a node whose received power is greater than a power threshold as a set of candidate nodes.

S905: The first IAB node judges whether there is an IAB node in the candidate node set whose hop count information is less than or equal to the hop count information of the first IAB node, if yes, execute S906, otherwise, execute S913;

S906: The first IAB node selects an IAB node whose hop count information is less than or equal to the hop count information of the first IAB node from the set of candidate nodes;

S907: The first IAB node judges whether the selected IAB node has at least one IAB node with the smallest hop count information, if yes, execute S908, otherwise, execute S909;

S908. The first IAB node randomly selects a node with the smallest hop number information from at least one node with the smallest hop number information for access, or selects a node with the smallest hop number information and the largest received power for access;

S909: The first node randomly selects a node from the selected nodes for access, or selects a node with the largest received power for access;

S910. Optionally, after the first IAB node accesses the node, it is determined whether the hop count information of the parent node of the first IAB node is greater than the hop count information of the first IAB node, if yes, execute S903, otherwise end;

S911. The first IAB node reduces the power threshold.

S912. The first IAB node judges whether the reduced power threshold is less than or equal to the minimum power threshold, if yes, execute S913, otherwise S903;

S913: The first IAB node sends RLF notification information to the child nodes of the first IAB node.

S914: The first IAB node selects a node with a received power greater than a power threshold from the IAB network.

It should be noted that the node with the received power greater than the power threshold in the IAB network selected in S914 may be the node with the smallest hop information among the nodes with the received power greater than the power threshold in the IAB network, and it may be the node with the received power greater than the power in the IAB network. Among the nodes with the threshold, the node with the largest received power can be the node with the smallest hop information and the largest received power among the nodes with the received power greater than the power threshold in the IAB network, or a random node in the IAB network with the received power greater than the power threshold. A selected node.

Example 5:

As shown in FIG. 10, it is a schematic flowchart of another cell selection method provided by an embodiment of the present disclosure.

S1001. The first IAB node determines the hop count information of the first IAB node, and receives the ID information of the descendant nodes of the first IAB node;

S1002. The first IAB node receives the RLF notification information sent by the parent node of the first IAB node.

S1003. The first IAB node judges whether there is a node whose received power is greater than the power threshold, if yes, execute S1004, otherwise execute S1011;

S1004. The first IAB node selects a node whose received power is greater than a power threshold, and forms the selected node into a candidate node set;

S1005. The first IAB node judges whether there is an IAB node in the candidate node set whose hop count information is less than or equal to its own hop count information, if yes, execute S1006, otherwise, execute S1009;

S1006. The first IAB node judges whether there is at least one IAB node with the smallest hop number information among the IAB nodes whose hop number information is less than or equal to its own hop number information, if yes, execute S1007, otherwise, execute S1008;

S1007. The first IAB node randomly selects a node with the smallest hop information from at least one node with the smallest hop information for access, or selects a node with the smallest hop information and the largest received power for access;

S1008. The first IAB node selects the node with the highest received power from the selected nodes for access;

S1009. The first IAB node judges whether there are other nodes in the set of candidate nodes except for the descendants of the first IAB node, if yes, execute S1010, otherwise, execute S1014;

S1010: The first IAB node accesses other nodes in the set of candidate nodes except the descendant nodes of the first IAB node;

It should be noted that, in the candidate node set accessed in S1010, except for the descendants of the first IAB node, other nodes may be nodes in the candidate node set whose received power is greater than the power threshold, or may be hops in the candidate node set. The node with the smallest number of information may be the node with the smallest hop information and the largest received power in the set of candidate nodes, or a node randomly selected from the set of candidate nodes.

S1011, the first IAB node reduces the power threshold;

S1012. The first IAB node judges whether the reduced power threshold is less than the minimum power threshold, if yes, execute S1013, otherwise execute S1003;

S1013. The first IAB node sends RLF notification information to the child nodes of the first IAB node.

S1014. The first IAB node accesses an IAB node in the IAB network whose received power is greater than the power threshold.

It should be noted that the node with the received power greater than the power threshold in the IAB network selected in S1014 may be the node with the smallest hop information among the nodes with the received power greater than the power threshold in the IAB network, and it may be the node with the received power greater than the power in the IAB network. Among the nodes with the threshold, the node with the largest received power can be the node with the smallest hop information and the largest received power among the nodes with the received power greater than the power threshold in the IAB network, or a random node in the IAB network with the received power greater than the power threshold. A selected node.

Based on the same inventive concept, the embodiment of the present disclosure provides a device for cell selection. Since the principle of the device to solve the problem is similar to the method, the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.

As shown in FIG. 11, a cell selection device provided by an embodiment of the present disclosure includes:

A processor 1100, a memory 1101, and a transceiver 1102;

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 can store data used by the processor 1100 when performing operations. The transceiver 1102 is used to receive and send data under the control of the processor 1100.

The bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors 1100 represented by the processor 1100 and various circuits of the memory represented by the memory 1101 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 can store data used by the processor 1100 when performing operations.

The processes disclosed in the embodiments of the present disclosure may be applied to the processor 1100 or implemented by the processor 1100. In the implementation process, each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1100 or instructions in the form of software. The processor 1100 may be a general-purpose processor 1100, a digital signal processor 1100, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the implementation of the present disclosure The methods, steps and logic block diagrams disclosed in the examples. The general-purpose processor 1100 may be a microprocessor 1100 or any conventional processor 1100 or the like. The steps of the method disclosed in the embodiments of the present disclosure may be directly embodied as executed and completed by the hardware processor 1100, or executed and completed by a combination of hardware and software modules in the processor 1100. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory 1101, and the processor 1100 reads the information in the memory 1101 and completes the steps of the signal processing flow in combination with its hardware.

Wherein, the processor 1100 is configured to read a program in the memory 1101 and execute the following process:

Access to the second node.

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

BAP address information of the descendant nodes.

Optionally, the processor 1100 is further configured to:

Receiving ID information reported by the descendant nodes of the first node;

Receiving hop information of the parent node of the first node;

Optionally, if the descendant nodes of the first node in the IAB network change, the ID information of the IAB donor or OAM device configuration in the IAB network received by the first node includes the changed descendant node Information or information of all descendants of the first node.

Optionally, the processor 1100 is further configured to:

Sending the broadcast information of the first node.

Optionally, the broadcast information includes the hop count information; the processor 1100 is further configured to:

Optionally, the processor 1100 is specifically configured to:

Select a second node from the set of candidate nodes.

Optionally, the processor 1100 is specifically configured to:

According to the node information of the descendant nodes, determine nodes in the IAB network that meet the power requirements except for the descendant nodes, and form a set of candidate nodes by the determined nodes.

Optionally, the processor 1100 is further configured to:

When determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes, if there is no node that meets the power requirements among the nodes in the IAB network except the descendant nodes, the first node The child node of sends an RLF notification, and selects a node that meets the power requirement from the descendant nodes of the first node to form a candidate node set.

Optionally, the processor 1100 determines a node that meets the power requirement in the following manner:

If there is no node with a received power greater than the first power threshold as a node that meets the power requirements, the first power threshold is lowered, and the step of determining whether there is a node with a received power greater than the first power threshold is returned to the step of determining whether there is a node with a received power greater than the first power threshold, until the reduced first The power threshold is less than the set minimum power threshold.

Optionally, the processor 1100 is further configured to:

Optionally, the node information includes the hop count information; the processor 1100 is specifically configured to:

Optionally, the processor 1100 is further configured to:

Determine the set of candidate nodes in the IAB network according to the node information of the first node, if the corresponding hop number information in the IAB network is less than or equal to the hop number information of the first node, there is no matching power The required node sends an RLF notification to the child nodes of the first node, and selects nodes meeting the power requirement from the descendant nodes of the first node to form a candidate node set.

Optionally, the processor 1100 is specifically configured to:

The node with the smallest hop count information and/or the largest received power is selected from the set of candidate nodes as the second node.

Optionally, the processor 1100 is further configured to:

According to the node information of the first node in the IAB network, before selecting the second node from the IAB network, the first node determines that the hop number information of the parent node is greater than the hop number information of the first node, Determine the need for cell reselection.

As shown in FIG. 12, another cell selection device provided by an embodiment of the present disclosure includes:

The selection module 1200 is configured to select a second node from the IAB network according to the node information used to determine the descendants of the first node in the IAB network during cell selection or cell reselection;

The access module 1201 is used to access the second node.

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

The address information of the descendant nodes;

BAP address information of the descendant node.

Optionally, the device further includes a processing module 1202. Before the selection module 1200 selects the second node from the IAB network, the processing module 1202 is specifically configured to:

The ID information is determined by at least one of the following methods:

Receiving ID information reported by the descendant nodes of the first node;

Receiving hop information of the parent node of the first node;

Optionally, the processing module 1202 is further configured to:

Sending the broadcast information of the first node.

Optionally, the broadcast information includes the hop count information; the processing module 1202 is further configured to:

Optionally, the processing module 1202 is specifically configured to:

Select a second node from the set of candidate nodes.

Optionally, the processing module 1202 is specifically configured to:

Optionally, the processing module 1202 is further configured to:

Optionally, the processing module 1202 determines a node that meets the power requirement in the following manner:

Optionally, the processing module 1202 is further configured to:

Optionally, the node information includes the hop count information; the processing module 1202 is specifically configured to:

Optionally, the processing module 1202 is further configured to:

Optionally, the processing module 1202 is specifically configured to:

Optionally, the processing module 1202 is further configured to:

The embodiment of the present disclosure also provides a computer-readable non-volatile storage medium, including program code, when the program code runs on a computing terminal, the program code is used to make the computing terminal execute the above-mentioned implementation of the present disclosure Examples of cell selection steps.

The present disclosure is described above with reference to block diagrams and/or flowcharts illustrating methods, devices (systems) and/or computer program products according to embodiments of the present disclosure. It should be understood that one block of the block diagram and/or flowchart diagram and a combination of the blocks in the block diagram and/or flowchart diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, and/or other programmable data processing devices to produce a machine, so that the instructions executed via the computer processor and/or other programmable data processing device are created for A method of implementing the functions/actions specified in the block diagrams and/or flowchart blocks.

Correspondingly, the present disclosure can also be implemented by hardware and/or software (including firmware, resident software, microcode, etc.). Furthermore, the present disclosure may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium to be used or used by an instruction execution system. Used in conjunction with the instruction execution system. In the context of the present disclosure, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by an instruction execution system, apparatus, or device, or in combination with an instruction execution system, Device or equipment use.

Obviously, 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. In this way, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies, the present disclosure also intends to include these modifications and variations.

Claims

A method for cell selection, characterized in that the method includes:

In the cell selection or cell reselection process, the first node selects the second node from the IAB network according to the node information used to determine the integrated access backhaul of the descendant nodes of the first node in the IAB network;

The first node accesses the second node.
The method according to claim 1, wherein the node information includes identification ID information and/or hop count information, wherein the hop count information is from the descendant node to the host node or the central node in the IAB network The hop count information of the control node;

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

The adaptive return BAP address information of the descendant nodes.
The method according to claim 2, wherein before the first node selects the second node from the IAB network, the method further comprises:

The ID information is determined by at least one of the following methods:

The first node receives ID information configured by a host node IAB donor or an operation, maintenance and management OAM device in the IAB network;

The first node obtains the ID information from the received broadcast information of the node in the IAB network;

Receiving, by the first node, ID information reported by the descendant nodes of the first node;

The hop count information is determined by at least one of the following methods:

The first node receives the hop count information configured by the host node IAB donor or OAM device in the IAB network;

Receiving, by the first node, the hop count information of the parent node of the first node;

The first node obtains the hop count information from the received broadcast information of the node in the IAB network.
The method of claim 3, wherein if the descendant nodes of the first node in the IAB network change, the ID configured by the IAB donor or OAM device in the IAB network received by the first node The information includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The method of claim 3, wherein the method further comprises:

The first node reports the ID information of the first node to the parent node of the first node; and/or

The first node sends the broadcast information of the first node.
The method of claim 5, wherein if the descendant nodes of the first node in the IAB network change, the first node reports to the parent node in the ID information of the first node It includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The method according to claim 5, wherein the broadcast information includes the hop count information;

Before the first node sends the broadcast information of the first node, the method further includes:

The first node determines the hop count information of the first node according to the hop count information of the parent node.
The method of claim 2, wherein the first node selecting the second node from the IAB network comprises:

Determining, by the first node, a set of candidate nodes in the IAB network according to the node information of the descendant nodes;

The first node selects a second node from the set of candidate nodes.
The method according to claim 8, wherein the first node determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes comprises:

According to the node information of the descendant nodes, the first node composes the determined nodes other than the descendant nodes in the IAB network into a candidate node set; or

The first node determines, according to the node information of the descendant nodes, the nodes in the IAB network that meet the power requirements other than the descendant nodes, and composes the determined nodes into a candidate node set.
The method according to claim 9, wherein the first node determines the set of candidate nodes in the IAB network according to the node information of the descendant nodes, further comprising:

If there is no node that meets the power requirements in the nodes other than the descendant nodes in the IAB network, the RLF notification of radio link failure is sent to the child nodes of the first node, and the descendants of the first node The nodes that meet the power requirements are selected from the nodes to form a set of candidate nodes.
The method according to claim 9, characterized in that the nodes meeting the power requirements are determined in the following manner:

Judging whether there is a node whose received power is greater than the first power threshold;

If yes, use the node whose received power is greater than the first power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the first power threshold as a node that meets the power requirements, the first power threshold is lowered, and the step of judging whether there is a node with a received power greater than the reduced first power threshold is returned until the lowered The first power threshold of is less than the set minimum power threshold.
The method according to any one of claims 2-11, wherein before the first node selects the second node from the IAB network according to the node information in the IAB network, the method further comprises:

After receiving the RLF notification sent by the parent node of the first node, the first node determines that cell reselection is required.
The method according to claim 8, wherein the node information includes the hop count information;

The first node determining the set of candidate nodes in the IAB network according to the node information of the first node includes:

The first node selects, from the IAB network, nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set; or

The first node determines from the IAB network that the corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirements, and the determined nodes form a candidate node set.
The method according to claim 13, wherein the first node determines a set of candidate nodes in the IAB network according to the node information of the first node, further comprising:

If there is no node meeting the power requirement among the nodes whose corresponding hop information is less than or equal to the hop information of the first node in the IAB network, send an RLF notification to the child nodes of the first node, and send an RLF notification from the Nodes that meet the power requirements are selected from the descendant nodes of the first node to form a set of candidate nodes.
The method according to claim 13, wherein the nodes that meet the power requirements are determined in the following manner:

Determine whether there is a node whose received power is greater than the second power threshold;

If yes, use the node whose received power is greater than the second power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the second power threshold as a node that meets the power requirements, then lower the second power threshold, and return to the step of judging whether there is a node with received power greater than the reduced second power threshold, until after the decrease The second power threshold of is less than the set minimum power threshold.
The method according to any one of claims 13 to 15, wherein the first node selecting the second node from the set of candidate nodes comprises:

The first node selects a node with the smallest hop count information and/or the largest received power from the set of candidate nodes as the second node.
The method according to any one of claims 2, 13 to 15, wherein the first node before selecting the second node from the IAB network according to the node information of the first node in the IAB network ,Also includes:

After determining that the hop number information of the parent node is greater than the hop number information of the first node, the first node determines that cell reselection is required.
A device for cell selection, characterized in that the device includes: a processor, a memory, and a transceiver;

Wherein, the processor is configured to read the program in the memory and execute:

In the process of cell selection or cell reselection, selecting a second node from the IAB network according to the node information used to determine the descendant nodes of the first node in the integrated access backhaul IAB network;

Access to the second node.
The device according to claim 18, wherein the node information includes ID information and/or hop count information, wherein the hop count information is from the descendant node to the host node in the IAB network or the central control The hop count information of the node;

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

The adaptive return BAP address information of the descendant nodes.
The device according to claim 19, wherein the processor is further configured to:

Before selecting the second node from the IAB network, determine the ID information by at least one of the following methods:

Receiving ID information configured by the host node IAB donor or the operation, maintenance and management OAM device in the IAB network;

Acquiring the ID information from the received broadcast information of the node in the IAB network;

Receiving ID information reported by the descendant nodes of the first node;

The hop count information is determined by at least one of the following methods:

Receiving the hop count information configured by the IAB donor or OAM device in the IAB network;

Receiving hop information of the parent node of the first node;

Obtain the hop count information from the received broadcast information of the node in the IAB network.
The device according to claim 20, wherein if the descendant nodes of the first node in the IAB network change, the ID configured by the IAB donor or OAM device in the IAB network received by the first node The information includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The device of claim 20, wherein the processor is further configured to:

Reporting the ID information of the first node to the parent node of the first node; and/or

Sending the broadcast information of the first node.
The device according to claim 22, wherein if the descendant nodes of the first node in the IAB network change, the first node reports to the parent node in the ID information of the first node It includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The device according to claim 22, wherein the broadcast information includes the hop count information; and the processor is further configured to:

Before sending the broadcast information of the first node, determine the hop count information of the first node according to the hop count information of the parent node.
The device according to claim 19, wherein the processor is specifically configured to:

Determining a set of candidate nodes in the IAB network according to the node information of the descendant nodes;

Select a second node from the set of candidate nodes.
The device according to claim 25, wherein the processor is specifically configured to:

According to the node information of the descendant nodes, the determined nodes in the IAB network other than the descendant nodes form a candidate node set; or

According to the node information of the descendant nodes, determine nodes in the IAB network that meet the power requirements except for the descendant nodes, and compose the determined nodes into a candidate node set.
The device of claim 26, wherein the processor is further configured to:

When determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes, if there is no node that meets the power requirements among the nodes in the IAB network except the descendant nodes, the first node The child node of sends an RLF notification, and selects nodes that meet the power requirements from the descendants of the first node to form a set of candidate nodes.
The device of claim 26, wherein the processor determines a node that meets the power requirement in the following manner:

Judging whether there is a node whose received power is greater than the first power threshold;

If yes, take the node whose received power is greater than the first power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the first power threshold as a node that meets the power requirements, the first power threshold is lowered, and the step of determining whether there is a node with a received power greater than the first power threshold is returned to the step of determining whether there is a node with a received power greater than the first power threshold, until the lowered first The power threshold is less than the set minimum power threshold.
The device according to any one of claims 19-28, wherein the processor is further configured to:

According to the node information in the IAB network, before selecting the second node from the IAB network, after receiving the RLF notification sent by the parent node of the first node, it is determined that cell reselection is required.
The device according to claim 25, wherein the node information includes the hop count information; and the processor is specifically configured to:

From the IAB network, select nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set; or

It is determined from the IAB network that the corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirements, and the determined nodes are formed into a candidate node set.
The device of claim 30, wherein the processor is further configured to:

Determining a set of candidate nodes in the IAB network according to the node information of the first node,

If there is no node meeting the power requirement among the nodes whose corresponding hop information is less than or equal to the hop information of the first node in the IAB network, send an RLF notification to the child nodes of the first node, and send an RLF notification from the Nodes that meet the power requirements are selected from the descendant nodes of the first node to form a set of candidate nodes.
The device according to claim 30, wherein the processor determines a node that meets the power requirement in the following manner:

Determine whether there is a node whose received power is greater than the second power threshold;

If yes, use the node whose received power is greater than the second power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the second power threshold as a node that meets the power requirements, the second power threshold is lowered, and the step of determining whether there is a node with a received power greater than the second power threshold is returned to the step of determining whether there is a node with a received power greater than the second power threshold, until the lowered second The power threshold is less than the set minimum power threshold.
The device according to any one of claims 30 to 32, wherein the processor is specifically configured to:

The node with the smallest hop count information and/or the largest received power is selected from the candidate node set as the second node.
The device according to any one of claims 19, 30 to 32, wherein the processor is further configured to:

According to the node information of the first node in the IAB network, before selecting the second node from the IAB network, the first node determines that the hop information of the parent node is greater than the hop information of the first node, Determine the need for cell reselection.
A cell selection device is characterized in that it comprises:

The selection module is configured to select a second node from the IAB network according to the node information used to determine the descendants of the first node in the IAB network during cell selection or cell reselection;

The access module is used to access the second node.
The device according to claim 35, wherein the node information includes identification ID information and/or hop number information, wherein the hop number information is from the descendant node to the host node or the central node in the IAB network The hop count information of the control node;

Wherein, the ID information includes part or all of the following:

ID information of the cell of the descendant node;

Address information of the descendant nodes;

The adaptive return BAP address information of the descendant nodes.
The device according to claim 36, further comprising a processing module, and before the selection module selects the second node from the IAB network, the processing module is specifically configured to:

The ID information is determined by at least one of the following methods:

Receiving ID information configured by an IAB donor or OAM device in the IAB network;

Acquiring the ID information from the received broadcast information of the node in the IAB network;

Receiving ID information reported by the descendant nodes of the first node;

The hop count information is determined by at least one of the following methods:

Receiving the hop count information configured by the IAB donor or OAM device in the IAB network;

Receiving hop information of the parent node of the first node;

Obtain the hop count information from the received broadcast information of the node in the IAB network.
The device according to claim 37, wherein if the descendant nodes of the first node in the IAB network change, the ID configured by the IAB donor or OAM device in the IAB network received by the first node The information includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The device of claim 37, wherein the processing module is further configured to:

Reporting the ID information of the first node to the parent node of the first node; and/or

Sending the broadcast information of the first node.
The device of claim 39, wherein if the descendant nodes of the first node in the IAB network change, the first node reports to the parent node in the ID information of the first node It includes the information of the descendant nodes that have changed or the information of all descendant nodes of the first node.
The device according to claim 39, wherein the broadcast information includes the hop count information; and the processing module is further configured to:

Before sending the broadcast information of the first node, determine the hop count information of the first node according to the hop count information of the parent node.
The device according to claim 36, wherein the processing module is specifically configured to:

Determining a set of candidate nodes in the IAB network according to the node information of the descendant nodes;

Select a second node from the set of candidate nodes.
The device according to claim 36, wherein the processing module is specifically configured to:

According to the node information of the descendant nodes, the determined nodes in the IAB network other than the descendant nodes are formed into a candidate node set; or

According to the node information of the descendant nodes, determine nodes in the IAB network that meet the power requirements except for the descendant nodes, and compose the determined nodes into a candidate node set.
The device according to claim 43, wherein the processing module is further configured to:

When determining the set of candidate nodes in the IAB network according to the node information of the descendant nodes, if there is no node that meets the power requirements among the nodes in the IAB network except the descendant nodes, the first node is sent The child node of sends an RLF notification, and selects nodes that meet the power requirements from the descendants of the first node to form a set of candidate nodes.
The device according to claim 43, wherein the processing module determines a node that meets the power requirement in the following manner:

Judging whether there is a node whose received power is greater than the first power threshold;

If yes, use the node whose received power is greater than the first power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the first power threshold as a node that meets the power requirements, then lower the first power threshold, and return to the step of judging whether there is a node with received power greater than the reduced first power threshold, until after the decrease The first power threshold of is less than the set minimum power threshold.
The device according to any one of claims 36 to 45, wherein the processing module is further configured to:

According to the node information in the IAB network, before selecting the second node from the IAB network, after receiving the RLF notification sent by the parent node of the first node, it is determined that cell reselection is required.
The device according to claim 42, wherein the node information includes the hop count information; and the processing module is specifically configured to:

From the IAB network, select nodes whose corresponding hop count information is less than or equal to the hop count information of the first node to form a candidate node set; or

It is determined from the IAB network that the corresponding hop number information is less than or equal to the hop number information of the first node and meets the power requirements, and the determined nodes are formed into a candidate node set.
The device according to claim 47, wherein the processing module is further configured to:

Determine the set of candidate nodes in the IAB network according to the node information of the first node, if the corresponding hop number information in the IAB network is less than or equal to the hop number information of the first node, there is no matching power The required node sends an RLF notification to the child nodes of the first node, and selects nodes that meet the power requirements from the descendant nodes of the first node to form a candidate node set.
The device according to claim 47, wherein the processing module determines a node that meets the power requirement in the following manner:

Determine whether there is a node whose received power is greater than the second power threshold;

If yes, use the node whose received power is greater than the second power threshold as a node that meets the power requirement;

If there is no node with a received power greater than the second power threshold as a node that meets the power requirements, the second power threshold is lowered, and the step of determining whether there is a node with a received power greater than the second power threshold is returned to the step of determining whether there is a node with a received power greater than the second power threshold, until the lowered second The power threshold is less than the set minimum power threshold.
The device according to any one of claims 47 to 49, wherein the processing module is specifically configured to:

The node with the smallest hop count information and/or the largest received power is selected from the candidate node set as the second node.
The device according to any one of claims 36 and 47 to 49, wherein the processing module is further configured to:

According to the node information of the first node in the IAB network, before selecting the second node from the IAB network, the first node determines that the hop information of the parent node is greater than the hop information of the first node, Determine the need for cell reselection.
A computer storage medium having a computer program stored thereon, wherein the program is executed by a processor to realize the steps of the method according to any one of claims 1-17.