Communication method and related equipment

Abstract

The invention relates to a communication method and related equipment, which are used for realizing an implementation mode of taking an IAB node or a host node or a network element of a core network as a determination party of a working mode of the IAB node under the condition that the IAB node supports a mobile IAB mode and an IAB mode. The working mode of the IAB node can be flexibly selected as one of the mobile IAB mode and the IAB mode, so that the communication flexibility of the IAB node in an IAB network is improved. In the method, an IAB node determines that the establishment of radio resource control (RRC) connection between the IAB node and a host node is not completed, or determines that the establishment of the RRC connection between the IAB node and the host node is completed, and the working mode of the IAB node is a mobile IAB mode, or determines that the establishment of the RRC connection between the IAB node and the host node is completed, or determines that the establishment of the RRC connection between the IAB node and the host node is completed. And the IAB node determines that the working mode of the IAB node is the IAB mode in the mobile IAB mode and the IAB mode.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and related equipment. Background Art

[0002] In the communication system, the integrated access and backhaul (IAB) technology enables both the access link and the backhaul link to adopt wireless transmission solutions, which can reduce the deployment of optical fibers and reduce costs.

[0003] Currently, an IAB network may include an IAB donor node and an IAB node, wherein the IAB node may realize data transmission through a communication connection with the donor node.

[0004] However, in the IAB network, how to improve the flexibility of IAB node communication is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The present application provides a communication method and related equipment, which are used to implement a method in which, when an IAB node supports a mobile IAB mode and an IAB mode, an IAB node, a host node, or a core network element is used as a determiner of the working mode of the IAB node, so that the working mode of the IAB node can be flexibly selected as one of the mobile IAB mode and the IAB mode, so as to improve the flexibility of the IAB node in communicating in the IAB network.

[0006] In a first aspect, the present application provides a communication method, which is executed by an IAB node, or the method is executed by some components in the IAB node (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can implement all or part of the functions of the IAB node. In the first aspect and its possible implementation, the communication method is described as being executed by an IAB node. In the method, the IAB node determines that the radio resource control (RRC) connection between the IAB node and the host node has not been established, or the IAB node determines that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is a mobile IAB mode, or the IAB node determines that the IAB node has completed the RRC connection establishment with the host node; the IAB node determines that the working mode of the IAB node is the IAB mode in the mobile IAB mode and the IAB mode.

[0007] Based on the above technical solution, the IAB node can be an IAB node that supports the mobile IAB mode and the IAB mode. When the IAB node has not determined the working mode (for example, the RRC connection of the IAB node has not been established; for example, the RRC connection of the IAB node has been established and the signal transmission has not been performed based on the backhaul link), or when the IAB node has determined that the working mode is the mobile IAB mode, the IAB node can determine that the working mode of the IAB node is the mobile IAB mode and the IAB mode in the IAB mode. In other words, when the IAB node supports the mobile IAB mode and the IAB mode, the IAB node can be used as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node as the mobile IAB mode and the IAB mode in the IAB mode. Therefore, for the IAB node that supports the mobile IAB mode and the IAB mode, it is no longer limited to communicating only through the mobile IAB mode, so that the working mode of the IAB node can access the network in the IAB mode or switch from the mobile IAB mode to the IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0008] It should be understood that the RRC establishment process between the IAB node and the host node may include the interaction of multiple messages, such as message 1 (message 1, MSG1), message 2 (message 2, MSG2), message 3 (message 3, MSG3), message 4 (message 4, MSG4), message 5 (message 5, MSG5), message A (message A, MSGA), message B (message B, MSGB), etc. Generally, after the IAB node sends MSG5 to the host node, the IAB node can determine that the RRC connection establishment between the IAB node and the host node is completed. Correspondingly, before the IAB node sends MSG5 to the host node, the IAB node can determine that the RRC connection establishment between the IAB node and the host node is not completed.

[0009] Optionally, MSG5 may indicate that the RRC establishment is complete, and accordingly, MSG5 may be replaced with other descriptions, such as an RRC connection establishment completion message.

[0010] It should be understood that the IAB node includes a mobile terminal (MT) and a distributed unit (DU). Generally, when the IAB node works in the IAB mode, the MT and the DU are connected to the same host node, and when the IAB node works in the mobile IAB mode, the MT and the DU can be connected to the same host node or to different host nodes. In any case where the RRC connection between the above-mentioned IAB node and the host node has not been established, or the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or the IAB node has completed the RRC connection establishment with the host node, the host nodes involved are all host nodes connected to the MT in the IAB node.

[0011] Optionally, the host node to which the MT is connected may be referred to as a non-F1-terminating donor, or a radio resource control terminating donor, etc. Correspondingly, the host node to which the DU is connected may be referred to as an F1-terminating donor, or a non-RRC-terminating donor, etc.

[0012] In a possible implementation manner of the first aspect, the method further includes: the IAB node sending first information to the host node, where the first information is used to indicate that the working mode of the IAB node is the IAB mode.

[0013] Based on the above technical solution, the IAB node may also send first information to the host node, so that the host node may determine that the working mode of the IAB node is the IAB mode based on the first information.

[0014] In a possible implementation manner of the first aspect, the first information satisfies any of the following:

[0015] The first information includes IAB node indication information and the first information does not include mobile IAB node indication information;

[0016] The first information includes the IAB node indication information and the mobile IAB node indication information;

[0017] The first information includes the IAB node indication information, the mobile IAB node indication information and first indication information, where the first indication information is used to indicate a preference for the IAB mode;

[0018] The first information includes the first indication information.

[0019] Based on the above technical solution, the first information may be implemented in the above multiple ways, that is, the host node may determine, based on the above multiple ways, that the first information is used to indicate that the working mode of the IAB node is the IAB mode.

[0020] In this application, preference can be replaced by other terms, such as tendency, choice, etc.

[0021] In a possible implementation of the first aspect, the method further includes: the IAB node receives second information from the host node, the second information includes configuration information of the access link of the IAB node and the second information does not include configuration information of the backhaul link of the IAB node, and / or the second information is used to indicate that both the mobile IAB authorization state and the IAB authorization state of the IAB node are unauthorized. Alternatively, the IAB node receives indication information from the host node indicating to release the RRC connection between the IAB node and the host node.

[0022] Based on the above technical solution, for an IAB node that supports mobile IAB mode and IAB mode, when the IAB node indicates through first information that the working mode of the IAB node is the IAB mode, the host node may consider that the IAB node is abnormal or the host node does not expect the working mode of the IAB node to be the IAB mode for other reasons (for example, the signal quality of the signal sent by the IAB node is lower than a threshold).

[0023] To this end, when the host node configures the configuration information of the access link of the IAB node through the second information, the second information sent by the host node may not send the configuration information of the backhaul link for the IAB node, thereby preventing the terminal device or other IAB node from accessing the IAB node as a sub-node, so as to avoid affecting the communication between the terminal device and the other IAB node.

[0024] Alternatively, the host node may indicate through the second information that both the mobile IAB authorization state and the IAB authorization state of the IAB node are unauthorized, which can also prevent the terminal device or other IAB node from accessing the IAB node as a child node, thereby avoiding affecting the communication between the terminal device and the other IAB node.

[0025] Alternatively, the host node may send an indication message to the IAB node indicating the release of the RRC connection between the IAB node and the host node (for example, through an RRC release message indication). The manner of releasing the RRC connection of the IAB node can also prevent the terminal device or other IAB node from accessing the IAB node as a sub-node, so as to avoid affecting the communication between the terminal device and the other IAB node.

[0026] In a possible implementation manner of the first aspect, the method further includes: the IAB node receiving indication information from the host node instructing to establish an F1 connection between the IAB node and the host node.

[0027] Based on the above technical solution, when the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, it is possible that the MT and DU in the IAB node are respectively connected to different host nodes. To this end, after the host node receives the first information, the host node can send an indication information instructing to establish an F1 connection between the IAB node and the host node, so that the MT and DU in the IAB node can be connected to the same host node, which can avoid communication errors caused by the MT and DU being connected to different host nodes in the IAB node when the working mode is the IAB mode.

[0028] In a possible implementation manner of the first aspect, the method further includes: the IAB node sends a request message to the host node requesting to establish an F1 connection between the IAB node and the host node, the request message including an identifier of the host node and / or indication information indicating that the IAB node is authorized to work in the IAB mode.

[0029] Based on the above technical solution, when the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, it is possible that the MT and DU in the IAB node are respectively connected to different host nodes. To this end, after the IAB node sends the first information, the IAB node can also send a request message to the host node requesting the establishment of an F1 connection between the IAB node and the host node, so that the MT and DU in the IAB node can be connected to the same host node, which can avoid communication errors caused by the MT and DU being connected to different host nodes in the IAB node when the working mode is the IAB mode.

[0030] Optionally, the identifier of the above-mentioned host node is the identifier of the RRC terminating donor, and the IAB node can obtain the identifier of the RRCterminating donor through operation administration and maintenance (OAM), or the IAB node can obtain the identifier of the RRCterminating donor through the RRC terminating CU, or the IAB node can obtain the identifier of the host node through the F1-terminating donor connected to the DU, which is not limited here.

[0031] In a possible implementation manner of the first aspect, the IAB node determines that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode, including: the IAB node determines, based on second indication information from the host node or second indication information from a core network element, that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode;

[0032] The second indication information indicates at least one of the following:

[0033] The mobile IAB authorization status of the IAB node is unauthorized;

[0034] The IAB authorization status of the IAB node is authorized;

[0035] The working mode of the IAB node is the mobile IAB mode and the IAB mode among the IAB modes.

[0036] Based on the above technical solution, the IAB node can receive the second indication information sent by the host node, or the IAB node can receive the second indication information from the core network element through the host node, and the second indication information indicates at least one of the above items, so that the IAB node can determine the working mode of the IAB node as the IAB mode in the mobile IAB mode and the IAB mode based on the above at least one item. In other words, the basis for the IAB node to determine that the working mode is the IAB mode can be the indication information provided by the host node or the core network element.

[0037] In a possible implementation manner of the first aspect, the IAB node may use the locally acquired information as a basis for determining that the working mode is the IAB mode.

[0038] In an implementation example, the energy consumption of the IAB node when operating in the mobile IAB mode and the IAB mode may be different. Generally, the mobile IAB mode supports more features (such as Figure 2f to Figure 2h The energy consumption corresponding to the mobile IAB mode may be higher than the energy consumption corresponding to the IAB mode. To this end, the IAB node may use its own energy status information as a basis for determining that the working mode is the IAB mode. For example, when the energy status information of the IAB node indicates that the energy load of the IAB node is higher than a certain threshold (or the remaining energy is lower than a certain threshold), the IAB node may determine that the working mode is the IAB mode.

[0039] In another implementation example, the IAB node works in the mobile IAB mode and the node movement corresponding to the IAB mode may be different. Generally, it is possible that the mobile IAB mode supports higher speed movement, and the IAB mode supports lower speed movement or no movement (or does not support higher speed movement). To this end, the IAB node can be based on its own mobile state information as a basis for determining that the working mode is the IAB mode. For example, when the mobile state information of the IAB node indicates that the moving speed of the IAB node is lower than a certain threshold, the IAB node can determine that the working mode is the IAB mode. Alternatively, the mobile state information can also be determined based on the number of cell reselections and / or switching times of the MT (i.e., IAB-MT) in the IAB node within a period of time. When the number of cell reselections and / or switching times of the IAB-MT within a period of time is greater than a certain threshold, the IAB node determines that the working mode is the mobile IAB mode, and when the number of cell reselections and / or switching times of the IAB-MT within a period of time is less than or equal to a certain threshold, the IAB node determines that the working mode is the IAB mode.

[0040] In another implementation example, the parent nodes corresponding to the IAB mode and the IAB mode may be different. For example, some parent nodes only support nodes accessing the mobile IAB mode (recorded as the first type of parent nodes), some parent nodes only support nodes accessing the IAB mode (recorded as the second type of parent nodes), and some parent nodes support nodes accessing the mobile IAB mode and support nodes accessing the IAB mode (recorded as the third type of parent nodes). Generally, the parent node can broadcast indication information of nodes supporting access to the mobile IAB mode in the system broadcast information. For example, the indication information sent by the first type of parent node and / or the third type of parent node can be a mobile IAB-support (mobile iab-support) information element carried by the system information block (SIB) 1, and the indication information sent by the second type of parent node can be an IAB-support (iab-support) information element carried by SIB1. Since the IAB node may need to provide network services to the child node through the access link, for this reason, the IAB node generally accesses the parent node with better signal quality. Correspondingly, the IAB node can use the signal quality information of the first type of parent node and / or the third type of parent node as the basis for determining that the working mode is the IAB mode. For example, when the signal quality corresponding to the signal quality information of the first type of parent node and / or the third type of parent node is lower than a certain threshold, the IAB node can determine that it may not be possible to obtain higher quality communication services through the mobile IAB mode at present. For this reason, the IAB node can determine that the working mode is the IAB mode, and access the second type of parent node to obtain communication services through the second type of parent node. Correspondingly, when the signal quality corresponding to the signal quality information of the first type of parent node or the third type of parent node is not lower than a certain threshold, the IAB node determines that the working mode is the mobile IAB mode, and accesses the first type of parent node or the third type of parent node to obtain communication services through the first type of parent node or the third type of parent node.

[0041] The second aspect of the present application provides a communication method, which is executed by an IAB node, or the method is executed by some components in the IAB node (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can implement all or part of the IAB node functions. In the second aspect and its possible implementation, the communication method is described as being executed by an IAB node. In the method, the IAB node determines that the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode; the IAB node determines that the working mode of the IAB node is the mobile IAB mode.

[0042] Based on the above technical solution, when the IAB node determines that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode, the IAB node can determine that the working mode of the IAB node is the mobile IAB mode. In other words, when the IAB node has determined that the working mode is the IAB mode, the IAB node can determine that the working mode of the IAB node is the mobile IAB mode, that is, the IAB node can be used as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node as the mobile IAB mode and the mobile IAB mode in the IAB mode. Therefore, for IAB nodes that support the mobile IAB mode and the IAB mode, they are no longer limited to communicating only through the mobile IAB mode, so that the working mode of the IAB node can be carried out in the IAB mode, and it can also support the working mode of the IAB node to switch from the IAB mode to the mobile IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0043] In a possible implementation manner of the second aspect, the method further includes: the IAB node sending third information to the donor node, where the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0044] Based on the above technical solution, the IAB node may also send third information to the host node, so that the host node may determine that the working mode of the IAB node is the mobile IAB mode based on the third information.

[0045] In a possible implementation manner of the second aspect, the third information satisfies any of the following:

[0046] The third information includes the mobile IAB node indication information;

[0047] The third information includes fourth indication information, where the fourth indication information is used to indicate preference for the mobile IAB mode.

[0048] Based on the above technical solution, the third information may be implemented in the above multiple ways, that is, the host node may determine the third information to indicate that the working mode of the IAB node is the mobile IAB mode based on the above multiple ways.

[0049] In a possible implementation manner of the second aspect, the method also includes: the IAB node receives fourth information from the host node, the fourth information indicates switching the child node of the IAB node to other network devices, and / or the fourth information indicates releasing the connection between the IAB node and the first parent node of the IAB node or releasing the connection between the IAB node and the second parent node of the IAB node, wherein the IAB node communicates with the first parent node and the second parent node via a dual connection.

[0050] Based on the above technical solution, the IAB node may support different communication characteristics in different working modes. For example, when the IAB node works in the IAB mode, the IAB node supports dual connection to two different parent nodes and supports access to child nodes; while when the IAB node works in the mobile IAB mode, the IAB node does not support dual connection to two different parent nodes and does not support access to child nodes. To this end, when the IAB node indicates through the third information that the working mode of the IAB node is switched from the IAB mode to the mobile IAB mode, the host node can indicate through the fourth information to switch the child nodes of the IAB node and / or indicate to release one of the dual connections to adapt to the mobile IAB mode of the IAB node, which can avoid communication errors of the child nodes of the IAB node working in the mobile IAB mode and / or avoid communication errors of the IAB node in the dual connection scenario.

[0051] It should be understood that the child node is another IAB node.

[0052] It should be understood that the first parent node and the second parent node may be different IAB nodes. Alternatively, the first parent node and the second parent node may be the same IAB node, and accordingly, the IAB node communicates with the first parent node and the second parent node through dual connections, which can be understood as the IAB node communicating with different cells in the same IAB node through dual connections.

[0053] In a possible implementation manner of the second aspect, the IAB node determining that the working mode of the IAB node is the mobile IAB mode includes: the IAB node determining that the working mode of the IAB node is the mobile IAB mode based on third indication information from the host node or third indication information from the core network element;

[0054] The third indication information indicates at least one of the following:

[0055] The mobile IAB authorization status of the IAB node is authorized;

[0056] The IAB authorization status of the IAB node is unauthorized;

[0057] The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0058] Based on the above technical solution, the IAB node can receive the third indication information sent by the host node, or the IAB node can receive the third indication information from the core network element through the host node, and the third indication information indicates at least one of the above items, so that the IAB node can determine the working mode of the IAB node as the mobile IAB mode and the mobile IAB mode in the IAB mode based on the above at least one item. In other words, the basis for the IAB node to determine that the working mode is the mobile IAB mode can be the indication information provided by the host node or the core network element.

[0059] In a possible implementation manner of the second aspect, the IAB node may use the locally acquired information as a basis for determining that the working mode is the mobile IAB mode.

[0060] In an implementation example, the energy consumption of the IAB node when operating in the mobile IAB mode and the IAB mode may be different. Generally, the mobile IAB mode supports more features (such as Figure 2f to Figure 2h The energy consumption corresponding to the mobile IAB mode may be higher than the energy consumption corresponding to the IAB mode. To this end, the IAB node may use its own energy status information as a basis for determining that the working mode is the mobile IAB mode. For example, when the energy status information of the IAB node indicates that the energy load of the IAB node is lower than a certain threshold (or the remaining energy is higher than a certain threshold), the IAB node may determine that the working mode is the mobile IAB mode.

[0061] In another implementation example, the movement of the node corresponding to the IAB mode and the IAB mode when the IAB node works may be different. Generally, it is possible that the mobile IAB mode supports movement at a higher speed, and the IAB mode supports movement at a lower speed or does not move (or does not support movement at a higher speed). To this end, the IAB node can use its own mobile state information as a basis for determining that the working mode is the IAB mode. For example, when the mobile state information of the IAB node indicates that the moving speed of the IAB node is higher than a certain threshold, the IAB node can determine that the working mode is the mobile IAB mode.

[0062] In another implementation example, the parent nodes corresponding to the IAB mode and the IAB mode may be different. For example, some parent nodes only support nodes accessing the mobile IAB mode (recorded as the first type of parent nodes), some parent nodes only support nodes accessing the IAB mode (recorded as the second type of parent nodes), and some parent nodes support nodes accessing the mobile IAB mode and support nodes accessing the IAB mode (recorded as the third type of parent nodes). Generally, the parent node can broadcast indication information of nodes supporting access to the mobile IAB mode in the system broadcast information. For example, the indication information sent by the first type of parent node and / or the third type of parent node can be a mobile IAB-support (mobile iab-support) information element carried by the system information block (SIB) 1, and the indication information sent by the second type of parent node can be an IAB-support (iab-support) information element carried by SIB1. Since the IAB node may need to provide network services to the child node through the access link, for this reason, the IAB node generally accesses the parent node with better signal quality. Accordingly, the IAB node may use the signal quality information of the second-type parent node as a basis for determining that the working mode is the mobile IAB mode. For example, when the signal quality corresponding to the signal quality information of the second-type parent node is lower than a certain threshold, the IAB node may determine that it may not be possible to obtain a higher quality communication service through the IAB mode at present. To this end, the IAB node may determine that the working mode is the mobile IAB mode, and access the first-type parent node or the third-type parent node to obtain the communication service through the first-type parent node or the third-type parent node.

[0063] The third aspect of the present application provides a communication method, which is executed by a host node, or the method is executed by some components in the host node (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can implement all or part of the host node function. In the third aspect and its possible implementation, the communication method is described as being executed by the host node. In this method, the host node receives indication information from the IAB node indicating that the IAB node supports a working mode of the mobile IAB mode; the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0064] Based on the above technical solution, the host node can receive indication information from the IAB node indicating that the IAB node supports the working mode of the mobile IAB mode, and determine that the IAB node can be an IAB node supporting the mobile IAB mode and the IAB mode based on the indication information. Thereafter, the host node can determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. In other words, when the IAB node supports the mobile IAB mode and the IAB mode, the host node can serve as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node to be one of the mobile IAB mode and the IAB mode. Thus, for the IAB node supporting the mobile IAB mode and the IAB mode, through the decision of the host node, the working mode of the IAB node can be one of the mobile IAB mode and the IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0065] In a possible implementation of the third aspect, the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on at least one of the following items, including: first information from the IAB node, third information from the IAB node, fifth information from the core network network element, and mobile status information of the IAB node; wherein the first information is used to indicate that the working mode of the IAB node is the IAB mode, the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, and the fifth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0066] Based on the above technical solution, when the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node may determine based on at least one of the above items to improve the flexibility of the solution implementation.

[0067] It should be understood that when the host node uses the mobility status information of the IAB node as the basis for determination, after the host node receives the mobility status information from the IAB node, the process in which the host node determines the working mode of the IAB node based on the mobility status information can refer to the relevant description of the first aspect mentioned above.

[0068] Optionally, after the mobility status information of the IAB node is determined, the host node can receive an RRC message sent by the IAB node, carrying the mobility status information of the IAB node. For example, the mobility status information of the IAB node can be carried or indicated by a mobility state (mobilityState) information element, and the mobilityState information element can be carried in an RRC recovery complete (RRCResumeComplete) message or an RRC setup complete message (RRCSetupComplete) message.

[0069] In a possible implementation manner of the third aspect, the method further includes: the donor node sending sixth information to a core network element, where the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0070] Based on the above technical solution, after the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node can also send sixth information to the core network element, so that the core network element determines the decision result of the host node based on the sixth information.

[0071] In a possible implementation manner of the third aspect, when the sixth information is used to indicate that the working mode of the IAB node is the IAB mode, the sixth information satisfies any of the following items:

[0072] The sixth information includes IAB node indication information and the sixth information does not include mobile IAB node indication information;

[0073] The sixth information includes the IAB node indication information and the mobile IAB node indication information;

[0074] The sixth information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, where the first indication information is used to indicate a preference for the IAB mode;

[0075] The sixth information includes the first indication information.

[0076] Based on the above technical solution, when the host node determines that the working mode of the IAB node is the IAB mode, the sixth information sent by the host node satisfies any of the above items. Accordingly, the core network network element can determine, based on any of the items, that the sixth information is used to indicate that the working mode of the IAB node is the IAB mode.

[0077] In a possible implementation manner of the third aspect, when the host node determines that the working mode of the IAB node is the IAB mode, the method further includes at least one of the following:

[0078] The host node sends second information to the IAB node, where the second information includes configuration information of an access link of the IAB node and does not include configuration information of a backhaul link of the IAB node, and / or the second information is used to indicate that both a mobile IAB authorization state and an IAB authorization state of the IAB node are unauthorized;

[0079] The host node sends, to the IAB node, indication information indicating release of the RRC connection between the IAB node and the host node;

[0080] The host node sends second indication information to the IAB node, where the second indication information is used to indicate at least one of the following: the mobile IAB authorization state of the IAB node is unauthorized, the IAB authorization state of the IAB node is authorized, and the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0081] Based on the above technical solution, when the host node determines that the working mode of the IAB node is the IAB mode, the host node can also enable subsequent IAB nodes to implement IAB mode communication based on the above at least one item through interaction of the above at least one item.

[0082] In a possible implementation manner of the third aspect, when the donor node determines that the working mode of the IAB node is the mobile IAB mode, the method further includes at least one of the following:

[0083] The host node sends fourth information to the IAB node, where the fourth information indicates switching a child node of the IAB node to another node, and / or the fourth information indicates releasing a connection between the IAB node and the first parent node or releasing a connection between the IAB node and the second parent node, wherein the IAB node communicates with the first parent node and the second node through a dual connection;

[0084] The host node sends third indication information to the IAB node, and the third indication information indicates at least one of the following: the mobile IAB authorization state of the IAB node is authorized; the IAB authorization state of the IAB node is unauthorized; the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0085] Based on the above technical solution, when the host node determines that the working mode of the IAB node is the mobile IAB mode, the host node can also enable the subsequent IAB node to implement mobile IAB mode communication based on the above at least one interaction.

[0086] The fourth aspect of the present application provides a communication method, which is executed by a core network element, or the method is executed by some components in the core network element (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can implement all or part of the core network element functions. In the fourth aspect and its possible implementation, the communication method is described as being executed by a core network element. In the method, the core network element determines that the working mode supported by the IAB node includes a mobile IAB mode; the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0087] Based on the above technical solution, after the core network network element determines that the IAB node can be an IAB node that supports the mobile IAB mode and the IAB mode, the core network network element can determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. In other words, when the IAB node supports the mobile IAB mode and the IAB mode, the core network network element can serve as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node to be one of the mobile IAB mode and the IAB mode. Therefore, for the IAB node that supports the mobile IAB mode and the IAB mode, through the decision of the core network network element, the working mode of the IAB node can be one of the mobile IAB mode and the IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0088] It should be noted that the core network element can determine that the working mode supported by the IAB node includes the mobile IAB mode in a variety of ways. For example, the core network element can receive capability information from the IAB node through the host node, and the capability information can indicate that the IAB node supports the mobile IAB mode. For another example, the core network element can determine that the IAB node supports the mobile IAB mode through the contract information.

[0089] Optionally, when the working mode supported by the IAB node includes the mobile IAB mode, the working mode supported by the IAB node may also include the IAB mode. In other words, the IAB node supporting the mobile IAB mode may also support the IAB mode.

[0090] In a possible implementation manner of the fourth aspect, the method further includes: the core network element sending fifth information to the host node of the IAB node, where the fifth information is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0091] Based on the above technical solution, after the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the core network element can also send fifth information to the host node so that the host node determines the decision result of the host node based on the fifth information.

[0092] In a possible implementation manner of the fourth aspect, the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including the following mode A and / or mode B.

[0093] Mode A. The core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on the current time of the IAB node and at least one of the following: a time range in which the IAB node is allowed to work in the mobile IAB mode, a time range in which the IAB node is allowed to work in the IAB mode, a time range in which the IAB node is not allowed to work in the mobile IAB mode, and a time range in which the IAB node is not allowed to work in the IAB mode;

[0094] Method B. The core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on the space where the IAB node is currently located and at least one of the following items: the spatial range in which the IAB node is allowed to work in the mobile IAB mode, the spatial range in which the IAB node is allowed to work in the IAB mode, the spatial range in which the IAB node is not allowed to work in the mobile IAB mode, and the spatial range in which the IAB node is not allowed to work in the IAB mode.

[0095] In a possible implementation of the fourth aspect, the core network network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the core network network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on sixth information, wherein the sixth information comes from the host node of the IAB node, and the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0096] Based on the above technical solution, in the process that the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node may determine based on the sixth information from the host node.

[0097] Optionally, the core network network element can use the mobility status information of the IAB node as a basis for determination. After the core network network element receives the mobility status information from the IAB node through the host node, the process in which the core network element determines the working mode of the IAB node based on the mobility status information can refer to the relevant descriptions of the first and third aspects mentioned above.

[0098] In a possible implementation manner of the fourth aspect, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the IAB mode:

[0099] Indication information indicating that the IAB authorization state of the IAB node is authorized;

[0100] Indication information indicating that the mobile IAB authorization state of the IAB node is unauthorized;

[0101] Indication information indicating the IAB mode of the IAB node.

[0102] Based on the above technical solution, when the core network network element determines that the working mode of the IAB node is the IAB mode, the fifth information sent by the core network network element satisfies any of the above items. Accordingly, the host node can determine, based on any of the items, that the fifth information is used to indicate that the working mode of the IAB node is the IAB mode.

[0103] In a possible implementation manner of the fourth aspect, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the mobile IAB mode:

[0104] Indication information indicating that the IAB authorization state of the IAB node is unauthorized;

[0105] Indication information indicating that the mobile IAB authorization state of the IAB node is authorized;

[0106] Indication information indicating the mobile IAB mode of the IAB node.

[0107] Based on the above technical solution, when the core network network element determines that the working mode of the IAB node is the mobile IAB mode, the fifth information sent by the core network network element satisfies any of the above items. Accordingly, the host node can determine, based on any of the items, that the fifth information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0108] In a possible implementation manner of the fourth aspect, the core network network element determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode includes: the core network network element determining that the working mode of the IAB node is the IAB mode; and the method further includes:

[0109] The core network element sends second indication information to the IAB node through the host node, and the second indication information is used to indicate at least one of the following: the mobile IAB authorization state of the IAB node is unauthorized, the IAB authorization state of the IAB node is authorized, and the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0110] Based on the above technical solution, when the core network element determines that the working mode of the IAB node is the IAB mode, the core network element can also send second indication information to the IAB node through the host node, so that the IAB node determines that the working mode of the IAB node is the IAB mode based on the second indication information.

[0111] In a possible implementation manner of the fourth aspect, the core network network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the core network network element determines that the working mode of the IAB node is the mobile IAB mode; the method also includes: the core network network element sends third indication information to the IAB node through the host node, and the third indication information indicates at least one of the following:

[0112] The mobile IAB authorization status of the IAB node is authorized;

[0113] The IAB authorization status of the IAB node is unauthorized;

[0114] The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0115] Based on the above technical solution, when the core network element determines that the working mode of the IAB node is the mobile IAB mode, the core network element can also send third indication information to the IAB node through the host node, so that the IAB node determines that the working mode of the IAB node is the mobile IAB mode based on the third indication information.

[0116] In a fifth aspect, the present application provides a communication device, which is an IAB node, or the device is a partial component (such as a processor, a chip or a chip system, etc.) in the IAB node, or the device can also be a logic module or software that can implement all or part of the IAB node functions. In the fifth aspect and its possible implementation, the communication device is described as an example of an IAB node.

[0117] The device includes a processing unit; the processing unit is used to determine that the RRC connection between the access backhaul integrated IAB node and the host node has not been established, or to determine that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or to determine that the IAB node has completed the RRC connection establishment with the host node; the processing unit is also used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0118] In a possible implementation manner of the fifth aspect, the device further includes a transceiver unit, which is used to send first information to the donor node, where the first information is used to indicate that the working mode of the IAB node is the IAB mode.

[0119] In a possible implementation manner of the fifth aspect, the first information satisfies any of the following:

[0120] The first information includes IAB node indication information and the first information does not include mobile IAB node indication information;

[0121] The first information includes the IAB node indication information and the mobile IAB node indication information;

[0122] The first information includes the IAB node indication information, the mobile IAB node indication information and first indication information, where the first indication information is used to indicate a preference for the IAB mode;

[0123] The first information includes the first indication information.

[0124] In a possible implementation of the fifth aspect, the transceiver unit is further used to receive second information from the host node, the second information including configuration information of the access link of the IAB node and the second information does not include configuration information of the backhaul link of the IAB node, and / or the second information is used to indicate that the mobile IAB authorization status and the IAB authorization status of the IAB node are both unauthorized.

[0125] In a possible implementation manner of the fifth aspect, the transceiver unit is further configured to receive indication information from the host node indicating to release the RRC connection between the IAB node and the host node.

[0126] In a possible implementation manner of the fifth aspect, the processing unit is used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode, including: the processing unit is specifically used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode based on the second indication information from the host node or the second indication information from the core network network element;

[0127] The second indication information indicates at least one of the following:

[0128] The mobile IAB authorization status of the IAB node is unauthorized;

[0129] The IAB authorization status of the IAB node is authorized;

[0130] The working mode of the IAB node is the mobile IAB mode and the IAB mode among the IAB modes.

[0131] In the fifth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the first aspect and achieve corresponding technical effects. For details, please refer to the first aspect and will not be repeated here.

[0132] In a sixth aspect of the present application, a communication device is provided, which is an IAB node, or the device is a partial component (such as a processor, a chip or a chip system, etc.) in the IAB node, or the device can also be a logic module or software that can implement all or part of the IAB node functions. In the sixth aspect and its possible implementation, the communication device is described as an example of an IAB node.

[0133] The device includes a processing unit; the processing unit is used to determine that the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode; the processing unit is also used to determine that the working mode of the IAB node is the mobile IAB mode.

[0134] In a possible implementation manner of the sixth aspect, the device further includes a transceiver unit, which is used to send third information to the donor node, where the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0135] In a possible implementation manner of the sixth aspect, the third information satisfies any one of the following items: the third information includes the mobile IAB node indication information; the third information includes fourth indication information, and the fourth indication information is used to indicate a preference for the mobile IAB mode.

[0136] In a possible implementation of the sixth aspect, the transceiver unit is also used to receive fourth information from the host node, the fourth information indicating switching of the child node of the IAB node to other network devices, and / or the fourth information indicating releasing the connection between the IAB node and the first parent node of the IAB node or releasing the connection between the IAB node and the second parent node of the IAB node, wherein the IAB node communicates with the first parent node and the second parent node via a dual connection.

[0137] In a possible implementation manner of the sixth aspect, the transceiver unit is used to determine that the working mode of the IAB node is a mobile IAB mode, including: the transceiver unit is specifically used to determine that the working mode of the IAB node is a mobile IAB mode based on the third indication information from the host node or the third indication information from the core network network element;

[0138] The third indication information indicates at least one of the following:

[0139] The mobile IAB authorization status of the IAB node is authorized;

[0140] The IAB authorization status of the IAB node is unauthorized;

[0141] The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0142] In the sixth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the second aspect and achieve corresponding technical effects. For details, please refer to the second aspect and will not be repeated here.

[0143] In a seventh aspect of the present application, a communication device is provided, which is a host node, or the device is a partial component in the host node (such as a processor, a chip or a chip system, etc.), or the device can also be a logic module or software that can implement all or part of the host node functions. In the seventh aspect and its possible implementation, the communication device is described as an example of executing as a host node.

[0144] The device includes a transceiver unit and a processing unit; the transceiver unit is used to receive indication information from an IAB node indicating that the IAB node supports a working mode of mobile IAB mode; the processing unit is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0145] In a possible implementation manner of the seventh aspect, the processing unit is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit is specifically used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on at least one of the following items, including: first information from the IAB node, third information from the IAB node, fifth information from a core network network element, and mobile state information of the IAB node;

[0146] The first information is used to indicate that the working mode of the IAB node is the IAB mode, the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, and the fifth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0147] In a possible implementation manner of the seventh aspect, the transceiver unit is further used to send sixth information to the core network element, where the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0148] In a possible implementation manner of the seventh aspect, when the sixth information is used to indicate that the working mode of the IAB node is the IAB mode, the sixth information satisfies any one of the following items:

[0149] The sixth information includes IAB node indication information and the sixth information does not include mobile IAB node indication information;

[0150] The sixth information includes the IAB node indication information and the mobile IAB node indication information;

[0151] The sixth information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, where the first indication information is used to indicate a preference for the IAB mode;

[0152] The sixth information includes the first indication information.

[0153] In a possible implementation manner of the seventh aspect, the transceiver unit is further configured to perform at least one of the following:

[0154] Sending second information to the IAB node, the second information including configuration information of an access link of the IAB node and not including configuration information of a backhaul link of the IAB node, and / or the second information is used to indicate that both a mobile IAB authorization state and an IAB authorization state of the IAB node are unauthorized;

[0155] Sending, to the IAB node, indication information for instructing to release the RRC connection between the IAB node and the donor node; or,

[0156] Sending second indication information to the IAB node, where the second indication information is used to indicate at least one of the following:

[0157] The mobile IAB authorization status of the IAB node is unauthorized.

[0158] The IAB authorization status of the IAB node is authorized.

[0159] The IAB node working mode is the IAB mode in the mobile IAB mode and the IAB mode.

[0160] In a possible implementation manner of the seventh aspect, the transceiver unit is further configured to perform at least one of the following:

[0161] Sending fourth information to the IAB node, the fourth information indicating switching a child node of the IAB node to another node, and / or the fourth information indicating releasing a connection between the IAB node and the first parent node or releasing a connection between the IAB node and the second parent node, wherein the IAB node communicates with the first parent node and the second node through a dual connection;

[0162] Sending third indication information to the IAB node, where the third indication information indicates at least one of the following:

[0163] The mobile IAB authorization status of the IAB node is authorized;

[0164] The IAB authorization status of the IAB node is unauthorized;

[0165] The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0166] In the seventh aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the third aspect and achieve corresponding technical effects. For details, please refer to the third aspect and will not be repeated here.

[0167] In an eighth aspect of the present application, a communication device is provided, which is a core network element, or the device is a partial component (such as a processor, a chip or a chip system, etc.) in the core network element, or the device can also be a logic module or software that can implement all or part of the core network element functions. In the eighth aspect and its possible implementation, the communication device is described as a core network element.

[0168] The device includes a processing unit; the processing unit is used to determine that the working mode supported by the IAB node includes a mobile IAB mode; the processing unit is also used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0169] In a possible implementation manner of the eighth aspect, the transceiver unit is further used to send fifth information to a host node of the IAB node, where the fifth information is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0170] In a possible implementation of the eighth aspect, the processing unit is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit is specifically used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on sixth information, wherein the sixth information comes from the host node of the IAB node, and the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0171] In a possible implementation manner of the eighth aspect, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the IAB mode:

[0172] Indication information indicating that the IAB authorization state of the IAB node is authorized;

[0173] Indication information indicating that the mobile IAB authorization state of the IAB node is unauthorized;

[0174] Indication information indicating the IAB mode of the IAB node.

[0175] In a possible implementation manner of the eighth aspect, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the mobile IAB mode:

[0176] Indication information indicating that the IAB authorization state of the IAB node is unauthorized;

[0177] Indication information indicating that the mobile IAB authorization state of the IAB node is authorized;

[0178] Indication information indicating the mobile IAB mode of the IAB node.

[0179] In a possible implementation manner of the eighth aspect, the processing unit is configured to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit is specifically configured to determine that the working mode of the IAB node is the IAB mode;

[0180] The transceiver unit is further configured to send second indication information to the IAB node through the host node, where the second indication information is used to indicate at least one of the following:

[0181] The mobile IAB authorization status of the IAB node is unauthorized.

[0182] The IAB authorization status of the IAB node is authorized.

[0183] The IAB node working mode is the IAB mode in the mobile IAB mode and the IAB mode.

[0184] In a possible implementation manner of the eighth aspect, the processing unit is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit is specifically used to determine that the working mode of the IAB node is the mobile IAB mode; the transceiver unit is further used to send third indication information to the IAB node through the host node, and the third indication information indicates at least one of the following:

[0185] The mobile IAB authorization status of the IAB node is authorized;

[0186] The IAB authorization status of the IAB node is unauthorized;

[0187] The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0188] In the eighth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the fourth aspect and achieve corresponding technical effects. For details, please refer to the fourth aspect and will not be repeated here.

[0189] The ninth aspect of the present application provides a communication device, comprising at least one processor, which is used to execute programs or instructions in a memory so that the device implements the method executed in each possible implementation manner of any one of the first to fourth aspects mentioned above.

[0190] The tenth aspect of the present application provides a communication device, comprising at least one logic circuit and an input-output interface; the logic circuit is used to execute the method executed in any possible implementation of any one of the first to fourth aspects mentioned above.

[0191] In the eleventh aspect of the present application, a computer-readable storage medium is provided, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method performed in each possible implementation of any one of the first to fourth aspects above.

[0192] The twelfth aspect of the present application provides a computer program product. When the computer program in the computer program product is executed by a processor, the processor executes the method performed in each possible implementation of any one of the first to fourth aspects above.

[0193] The thirteenth aspect of the present application provides a chip system, which includes at least one processor for supporting a communication device to implement the method executed in each possible implementation manner of any one of the first to fourth aspects above.

[0194] In a possible design, the chip system may also include a memory for storing program instructions and data necessary for the first communication device. The chip system may be composed of a chip, or may include a chip and other discrete devices. Optionally, the chip system also includes an interface circuit, which provides program instructions and / or data for the at least one processor.

[0195] A fourteenth aspect of the present application provides a communication system, which includes at least two devices among the IAB node, the host node and the core network element in any of the above aspects and any of the implementation methods.

[0196] It should be understood that the technical effects brought about by any design method in the fifth to fourteenth aspects can refer to the technical effects brought about by the different design methods in the first to fourth aspects mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0197] Figure 1 A schematic diagram of a communication system provided for this application;

[0198] Figure 2a A schematic diagram of the IAB communication scenario provided for this application;

[0199] Figure 2b Another schematic diagram of the IAB communication scenario provided for this application;

[0200] Figure 2c A schematic diagram of the IAB communication protocol stack provided for this application;

[0201] Figure 2d Another schematic diagram of the IAB communication protocol stack provided for this application;

[0202] Figure 2e A schematic diagram of the IAB access process provided for this application;

[0203] Figure 2f A schematic diagram of IAB node migration;

[0204] Figure 2g Another diagram for IAB node migration;

[0205] Figure 2h Another diagram for IAB node migration;

[0206] Figure 3A schematic diagram of the communication method provided by the present application;

[0207] Figure 4 Another schematic diagram of the communication method provided by the present application;

[0208] Figure 5 Another schematic diagram of the communication method provided by the present application;

[0209] Figure 6 Another schematic diagram of the communication method provided by the present application;

[0210] Figure 7 A schematic diagram of a communication device provided for this application;

[0211] Figure 8 Another schematic diagram of a communication device provided by the present application;

[0212] Fig. 9 Another schematic diagram of a communication device provided by the present application. DETAILED DESCRIPTION

[0213] First, some terms that may be involved in the embodiments of the present application are explained.

[0214] (1) Configuration and pre-configuration: In this application, configuration and pre-configuration will be used at the same time. Configuration refers to the base station or server and other network devices sending some parameter configuration information or parameter values ​​to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration. It can be a method in which a base station or server and other network devices send parameter information or values ​​to the terminal through a communication link or carrier; it can also be a definition of corresponding parameters or parameter values ​​given in the standard, or by setting the relevant parameters or values ​​in the terminal device in advance. This application does not limit this. Furthermore, these values ​​and parameters can be changed or updated.

[0215] (2) In this application, "used for indication" may include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used for indicating A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0216] In this application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, it can be implemented by direct indication, such as by indicating the information to be indicated itself or the index of the information to be indicated. It can also be implemented by indirectly indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent.

[0217] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be pre-defined, for example, pre-defined according to the protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can include, for example but not limited to, one or a combination of at least two of RRC signaling, medium access control (medium access control, MAC) layer signaling and physical layer signaling. Among them, the MAC layer signaling, for example, includes a medium access control control element (medium access control control element, MACCE); the physical layer signaling, for example, includes downlink control information (downlink control information, DCI).

[0218] (3) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated with each other are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0219] In addition, in this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various methods / designs / implementations in each embodiment, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments and the various methods / designs / implementations in each embodiment are consistent and can be referenced to each other, and the technical features in different embodiments and the various methods / designs / implementations in each embodiment can be combined to form new embodiments, methods, or implementations according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application.

[0220] (4) "Send" and "receive" in the embodiments of the present application indicate the direction of signal transmission. For example, the communication process between entity A and entity B is taken as an example. In the present application, entity A sends information to entity B, which may be A directly sending to B or A indirectly sending to B through other entities. Similarly, entity B receives information from entity A, which may be entity B directly receiving the information sent by entity A or entity B indirectly receiving the information sent by entity A through other entities. Entities A and B here may be RAN nodes or terminals, or modules inside RAN nodes or terminals. The sending and receiving of information may be information interaction between a RAN node and a terminal, for example, information interaction between a base station and a terminal; the sending and receiving of information may also be information interaction between two RAN nodes, for example, information interaction between a CU and a DU; the sending and receiving of information may also be information interaction between different modules inside a device, for example, information interaction between a terminal chip and other modules of the terminal, or information interaction between a base station chip and other modules in the base station. "Send" may also be understood as "output" of a chip interface, and "receive" may also be understood as "input" of a chip interface.

[0221] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various methods / designs / implementations in each embodiment, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments and the various methods / designs / implementations in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various methods / designs / implementations in each embodiment can be combined to form new embodiments, methods, or implementations according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application.

[0222] See also Figure 1 , is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application.

[0223] like Figure 1 As shown, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as Figure 1 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 1 RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 1 (not shown in the figure). The terminal 120 is connected to the RAN node 110 by wireless means, and the RAN node 110 is connected to the core network 200 by wireless or wired means. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or may be the same physical device that integrates the logical functions of the core network device and the logical functions of the RAN node. Terminals and terminals and RAN nodes and RAN nodes may be connected to each other by wired or wireless means.

[0224] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, an NR system, and a future radio access system defined in the 3rd generation partnership project (3GPP). RAN100 may also include two or more of the above-mentioned different radio access systems. RAN100 may also be an open RAN (open RAN, O-RAN).

[0225] RAN node, also known as radio access network equipment, RAN entity or access node, is used to help terminals access the communication system wirelessly. In one application scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the fifth generation (5G) mobile communication system, a next generation NodeB in the sixth generation (6G) mobile communication system, or a base station in a future mobile communication system. RAN nodes can be macro base stations (such as Figure 1 110a), or a micro base station or an indoor station (such as Figure 1 110b) in the figure, it can also be a relay node or a donor node.

[0226] In another application scenario, the cooperation of multiple RAN nodes can be used to help the terminal achieve wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU) or a radio unit (RU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the MAC layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned various protocol layers, please refer to the relevant technical specifications of 3GPP. RU can be used to implement the transceiver function of radio frequency signals. CU and DU can be two independent RAN nodes, or they can be integrated in the same RAN node, such as integrated in a baseband unit (BBU). RU can be included in a radio frequency device, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0227] In different systems, RAN nodes may have different names. For example, in an O-RAN system, CU may be called an open CU (open CU, O-CU), DU may be called an open DU (open DU, O-DU), and RU may be called an open RU (open RU, O-RU). The RAN nodes in the embodiments of the present application may be implemented by software modules, hardware modules, or a combination of software modules and hardware modules. For example, the RAN node may be a server loaded with corresponding software modules. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node.

[0228] For ease of description, the following description takes a base station as an example of a RAN node. It can be understood that when the communication system includes an IAB network, the base station (ie, RAN node) can be an IAB node.

[0229] A terminal is a device with wireless transceiver function, which can send signals to a base station or receive signals from a base station. A terminal can also be called a terminal device, user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0230] Base stations and terminals can be fixed or movable. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0231] The roles of the base station and the terminal can be relative, for example, Figure 1 The helicopter or drone 120i in the figure can be configured as a mobile base station. For the terminal 120j that accesses the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices. Figure 1 110a and 110b in the figure may be referred to as communication devices having base station functions. Figure 1 120a-120j in the figure can be called communication devices with terminal functions.

[0232] Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; they can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0233] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem including the base station function. The control subsystem including the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.

[0234] It should be understood that the present application can be applied to a long term evolution (LTE) system, a new radio (NR) system, or a communication system evolved after 5G (such as 6G, etc.). The communication system includes network equipment and terminal equipment.

[0235] exist Figure 1 In the communication system shown, the IAB technology is used in both the access link and the backhaul link to adopt wireless transmission solutions, which can reduce the deployment of optical fiber; and can meet the needs of increased network capacity, wider coverage, ultra-high reliability and ultra-low latency.

[0236] In the IAB network, the relay node, or IAB-node, can provide wireless access services for terminal devices. The service data of the terminal device is transmitted by the IAB-node to the IAB host (IAB-donor) through the wireless backhaul link. The IAB-node consists of an MT part and a DU part. When the IAB-node faces its parent node, it can act as a terminal device, that is, the role of MT; when the IAB-node faces its child node (the child node may be another IAB-node, or an ordinary terminal device), it is regarded as a network device, that is, the role of DU. The IAB-donor is an access network element with complete base station (such as gNB) functions, including CU and DU. The IAB-donor is connected to the core network that serves the terminal device (for example, connected to the 5G core network).

[0237] The following will be combined Figure 2a to Figure 2h The implementation example shown introduces the IAB network.

[0238] like Figure 2a FIG. 4 is a schematic diagram of the IAB network.

[0239] exist Figure 2a In the IAB network shown, the terminal devices include UE1 and UE2, and the IAB nodes include IAB Node 1 to IAB Node 5, as well as an IAB donor node. A transmission path between any UE and an IAB-donor may include one or more IAB-nodes. Each IAB-node needs to maintain a wireless backhaul link to the parent node and also needs to maintain a wireless link with the child node. If the child node of the IAB-node is a terminal device (such as Figure 2a If the child node of the IAB-node is another IAB-node, the link between the IAB-node and the child node (ie, the other IAB-node) is a wireless backhaul link. Figure 2a In the path "UE1→IAB-node4→IAB-node3→IAB-node1→IAB-donor", UE1 accesses IAB-node4 through a wireless access link, IAB-node4 is connected to IAB-node3 through a wireless backhaul link, IAB-node3 is connected to IAB-node1 through a wireless backhaul link, and IAB-node1 is connected to IAB-donor through a wireless backhaul link.

[0240] like Figure 2b FIG. 4 is a schematic diagram showing a wireless relay scenario implemented through standalone (SA) networking.

[0241] like Figure 2b As shown in the figure, the communication nodes include 5G core network (5G core, 5GC), 5G access network equipment (denoted as gNodeB in the figure), IAB-donor, and one or more IAB-nodes. Figure 2b In the figure, the IAB-node DU (hereinafter simply referred to as IAB-DU) is logically connected to the IAB-donor CU (hereinafter simply referred to as CU) through the F1 interface. In fact, the connection between the IAB-DU and the CU is realized through the NRUu interface between the IAB-node MT and the parent node DU of each hop. However, since the IAB-DU can communicate with the CU in the end, it can be considered that the F1 interface exists logically.

[0242] Exemplarily, the F1 interface may be used to support a user plane protocol (F1-user plane, F1-U) and a control plane protocol (F1-control plane, F1-C).

[0243] For example, Figure 2c As shown, F1-U includes one or more of the following protocol layers: general packet radio service tunneling protocol user plane (GTP-U), user datagram protocol (UDP), internet protocol (IP) and other protocol layers. Through F1-U, user plane data transmission and downlink transmission status feedback can be performed between IAB-donor and IAB-node.

[0244] For example, Figure 2d As shown, F1-C includes one or more of the following: F1 application protocol (F1AP), stream control transport protocol (SCTP), IP and other protocol layers. Through F1-C, the IAB-donor and IAB-node can perform interface management, manage the IAB-DU, and perform UE context-related configuration.

[0245] It should be understood that Figure 2c and Figure 2d In the present invention, the UE and the IAB node communicate with each other through the Uu interface, and different IAB nodes communicate with each other through a backhaul link (BL).

[0246] The following Figure 2e , introduces the process of IAB node integration. Figure 2e In the example, taking the network access process of IAB-node2, IAB-node1 is the parent node of IAB-node2 and has been connected to the network.

[0247] The IAB node access process can be summarized as follows:

[0248] Step 1: For cells supporting the IAB function, the iab-support information element can be broadcast in SIB1. The IAB-MT in the IAB node that supports the IAB mode will select the cell with the iab-support information element in SIB1 to access, establish an RRC connection with the donor, and indicate that it is an IAB node when establishing the RRC connection (carrying IABnode indication in the RRCSetupComplete message). When the donor-CU sends the UE initial message (INITIAL UE MESSAGE) to the core network (specifically, it can be the AMF network element in the core network), it also carries the IAB node indication. The AMF authenticates the IAB-MT and carries the IAB Authorized information element in the message (INITIALCONTEXT SETUP REQUEST) instructing the donor-CU to establish the UE initial context for the IAB-MT, and authorizes the IAB node. If the authentication is successful, the value of IAB Authorized is authorized, otherwise IAB Authorized is not authorized.

[0249] Optionally, for cells supporting the mobile integrated access and backhaul (mobile IAB-node, or, mIAB) function, the mobile iab-support information element can be broadcast in SIB1. Similarly, the IAB-MT in the IAB node that supports the mobile IAB mode can select the cell access with the mobile iab-support information element in SIB1 to establish an RRC connection with the donor. The execution process of the AMF network element in the subsequent core network can refer to the processing process of the above-mentioned IAB mode.

[0250] Since the network access process of the IAB node is introduced here, it is assumed that the value of IAB Authorized is authorized and proceed to the subsequent steps.

[0251] Step 2-1: donor-CU configures the backhaul link RLC channel (BH RLCChannel) and performs routing configuration for IAB-node through RRC message. Specifically, only a default BHRLC Channel and a default route are configured at this time for the initial establishment of the F1 interface (e.g., step 3). After the F1 interface is established, more BH RLC Channels and routing paths can be configured to IAB-node through F1-C message for subsequent use of more F1-C messages and F1-U user plane data.

[0252] Step 2-2: In addition to configuring IAB-node2 in step 2-1, in step 2-2, routing updates can be performed on the nodes between IAB-node and donor (IAB-node1) to inform these nodes how to select the next-hop link and next-hop RLC Channel when receiving data packets from IAB-node2 or sending data packets to IAB-node2.

[0253] Step 3: IAB-DU2 in IAB-node2 uses the default configuration obtained in step 2-1 to send an F1SETUP REQUEST message to donor-CU, carrying the cell configuration information under DU2, and requesting to establish the F1 interface. Donor-CU replies F1SETUP RESPONSE to IAB-DU2, activates the cell, and completes the establishment of the F1 interface. At this point, IAB-node2 has been activated and can provide services for terminal devices and / or the next-hop IAB-MT.

[0254] The following Figure 2f , Figure 2g and Figure 2h This section describes the migration process of IAB nodes.

[0255] like Figure 2f FIG. 1 is an example of implementing partial migration of an IAB node. Figure 2f In the example, the IAB node where migration occurs can be called a boundary node, such as the mobile integrated access and backhaul (mIAB) in the figure.

[0256] exist Figure 2fBefore executing Partial migration, there is an RRC connection between the MT in the mAB (denoted as mAB-MT) and CU1, and there is an F1 interface between the DU in the mAB (denoted as mAB-DU) and CU1. to communicate.

[0257] exist Figure 2f In the process of partial migration, the mAB-MT undergoes cross-CU cell switching and establishes an RRC connection with CU2. However, in order to avoid the introduction of the F1 interface re-establishment process, the mAB-DU still maintains the F1 interface with CU1 and does not establish the F1 interface with CU2. Therefore, the communication path between CU1 and the mAB-DU becomes cross-topology:

[0258] Optionally, in Figure 2f In the example, CU1 and CU2 are respectively referred to as F1-terminating CU and non-F1-terminating CU (or RRC terminating CU), and can also be referred to as source CU and target CU. It should be noted that data does not pass through CU2 when transmitted on the cross-topology path, and CU1 and Donor-DU2 can communicate directly through the IP network.

[0259] In addition, Figure 2fIn the example, when there is traffic transmission between CU1 and UE, CU1 can send IAB TRANSPORTMIGRATION MANAGEMENT REQUEST message to CU2. The purpose of this message is to let CU2 help CU1 transmit traffic between CU1 and UE. That is, F1 terminating CU sends IAB TRANSPORT MIGRATIONMANAGEMENT REQUEST message to non F1-terminatingCU to request to establish cross-topology traffic transmission. If non F1-terminating CU agrees to establish, it replies IAB TRANSPORT MIGRATION MANAGEMENT RESPONSE message to F1 terminating CU. If it disagrees, it replies IAB TRANSPORT MIGRATION MANAGEMENT REJECT message. If F1terminating CU or non F1-terminatingCU wants to modify or withdraw QoS of traffic, it can also exchange IAB TRANSPORT MIGRATION MODIFICATION REQUEST / RESPONSE messages.

[0260] like Figure 2g As shown in FIG. 2G , an implementation example of the IAB node performing consecutive partial migration is shown in FIG. 2G . In FIG. 2G , the miAB node that undergoes migration may be a migration caused by its own movement.

[0261] exist Figure 2g In the example, migration 1 indicates the transition between mAB-DU and CU1. Figure 2g The migration process shown, from the source communication path Migrate to target communication path process.

[0262] After Migration 1, the mAB-DU can perform the next migration process, namely, Migration 2. That is, the mAB-MT switches from CU2 to CU3, but the F1 interface of the DU is always associated with CU1. Figure 2gAs shown, the mAB-node is directly connected to the donor-DU, but this is not limited. There may be other IAB nodes between the mAB-node and the donor-DU. In addition, regarding how the MT arrives at CU2, the MT may be switched from CU1 to CU2, but it may also be switched from other CUs to CU2 (not shown in the figure, which can be understood in conjunction with the DU migration scenario below).

[0263] like Figure 2h As shown, it is an implementation example of the IAB node performing DU migration.

[0264] Considering the large-scale mobility of IAB nodes (such as mAB nodes), when the mAB-node moves far away, the mAB-DU may find it difficult to maintain an IP connection with the original CU, or the transmission delay may be very large. Therefore, in order to support large-scale mobility, DU migration can be introduced. Figure 2h As shown, the RRC connection of MT can always be on CU2, and the F1 interface of DU is migrated from CU1 to CU3. The figure shows mAB-DU1 and mAB-DU2, which are two logical DUs on a physical DU. DU migration is achieved in this way: assuming that the source DU is mAB-DU1, mAB-node generates a new logical DUmIAB-DU2, and mAB-DU2 establishes an F1 interface with CU3. CU1 sends a terminal device switching request to CU3, switching the terminal device from the cell under mAB-DU1 to the cell under mAB-DU2, and then CU1 releases the F1 interface between it and mAB-DU1. At this point, DU migration is completed.

[0265] As can be seen from the above introduction of the IAB network, the IAB network may include an IAB donor node and an IAB node. The IAB node may realize data transmission through a communication connection with the donor node. In addition, the IAB node may have multiple working modes, including an IAB mode and a mobile IAB mode, and there may be some differences between these two working modes.

[0266] In an implementation example, compared with the IAB mode, the mobile IAB mode supports more features, including but not limited to the above Figure 2f Partial migration described, Figure 2g The following describes the consecutive partial migration: Figure 2hOne or more items in the DU migration described. That is, the IAB node in IAB mode does not support the one or more items.

[0267] In another implementation example, compared with the IAB mode, the mobile IAB mode reduces (or disables) some features. For example, the mobile IAB mode does not support the IAB node connecting to different cells via dual connections, while the IAB mode supports the IAB node connecting to different cells via dual connections. For another example, the IAB mode supports the connection of other IAB nodes under the IAB node (that is, the child nodes of the IAB node in the IAB mode can be IAB nodes), while the mobile IAB mode does not support the connection of other IAB nodes under the IAB node (that is, the child nodes of the IAB node in the mobile IAB mode cannot be IAB nodes).

[0268] As mentioned above Figure 2e It can be seen from step 1 shown that, when the system broadcast information of the parent node carries the iab-support information element and does not carry the mobile iab-support information element, if the IAB node supports the mobile IAB mode and the IAB mode, then the IAB node can access the parent node, and the IAB node works in the IAB mode. Similarly, when the system broadcast information of the parent node carries the mobile iab-support information element, if the IAB node supports the mobile IAB mode and the IAB mode, then the IAB node can access the parent node, and the IAB node works in the mobile IAB mode.

[0269] In other words, the decision basis for whether the working mode of the IAB node is the IAB mode or the mobile IAB mode is whether the system broadcast information of the parent node carries the mobile iab-support information element. If the mobile iab-support information element is carried, then the IAB node will work in the mobile IAB mode after connecting to the parent node; if the mobile iab-support information element is not carried, then the IAB node will work in the IAB mode after connecting to the parent node.

[0270] However, in the IAB network, the above method of determining the working mode of the IAB node by whether the parent node broadcasts the mobile iab-support information element is relatively limited.

[0271] For example, the energy consumption of an IAB node operating in the mobile IAB mode and the IAB mode may be different. Generally, the mobile IAB mode supports more features (e.g. Figure 2f to Figure 2hThe migration characteristics described above) may indicate that the energy consumption corresponding to the mobile IAB mode is higher than that corresponding to the IAB mode. Therefore, the IAB node may need to use its own energy state information as a basis for determining that the working mode is the IAB mode, so that the working mode of the IAB node can adapt to its own energy state information.

[0272] For another example, the IAB node works in the mobile IAB mode and the node movement corresponding to the IAB mode may be different. Generally, it is possible that the mobile IAB mode supports higher speed movement, and the IAB mode supports lower speed movement or no movement (or does not support higher speed movement). To this end, the IAB node or the network device connected to the IAB node (such as a host node or a core network element) may need to use the mobile state information of the IAB node as a basis for determining that the working mode is the IAB mode, so that the working mode of the IAB node can adapt to its mobile state information.

[0273] In summary, the current method of determining the working mode of an IAB node based on whether the parent node of the IAB node broadcasts the mobile iab-support information element is relatively limited. Therefore, how to improve the flexibility of IAB node communication is a technical problem that needs to be solved urgently.

[0274] In order to solve the above problems, the present application provides a communication method and related equipment, which is used for implementing a method in which, when an IAB node supports a mobile IAB mode and an IAB mode, an IAB node or a host node or a core network element is used as a determiner of the working mode of the IAB node, so that the working mode of the IAB node can be flexibly selected as one of the mobile IAB mode and the IAB mode, so as to improve the flexibility of the IAB node in communicating in the IAB network. This will be described in detail below with reference to the accompanying drawings.

[0275] See also Figure 3 , is a schematic diagram of the communication method provided in this application, and the method includes the following steps.

[0276] It should be noted that in Figures 3 to 6In the implementation process shown, the IAB node, the host node and the core network element are used as the execution subject of the interaction diagram as an example to illustrate the method, but the present application does not limit the execution subject of the interaction diagram. For example, the method executed by the IAB node can also be executed by a module of the IAB node (such as a chip, a chip system, or a processor), and can also be implemented by a logical node, a logical module or software that can implement all or part of the IAB node. The method executed by the host node can also be executed by a module of the host node (such as a chip, a chip system, or a processor), and can also be implemented by a logical node, a logical module or software that can implement all or part of the host node function. The method executed by the core network element can also be executed by a module of the core network element (such as a chip, a chip system, or a processor), and can also be implemented by a logical node, a logical module or software that can implement all or part of the core network element function.

[0277] It should be understood that Figures 3 to 6 In the implementation process shown, the core network element may be an element for access management and / or mobility management functions. For example, the name of the core network element may be an access and mobility management function (AMF) element, or, as standards or technologies evolve, the name of the core network element may be other descriptions, which are not limited here.

[0278] S301. The IAB node determines that the RRC connection between the IAB node and the host node has not been established, or the IAB node determines that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or the IAB node determines that the IAB node has completed the RRC connection establishment with the host node.

[0279] S302. The IAB node determines that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0280] It should be understood that the RRC establishment process between the IAB node and the host node may include the interaction of multiple messages, such as message 1 (message 1, MSG1), message 2 (message 2, MSG2), message 3 (message 3, MSG3), message 4 (message 4, MSG4), message 5 (message 5, MSG5), message A (message A, MSGA), message B (message B, MSGB), etc. Generally, after the IAB node sends MSG5 to the host node in step S301, the IAB node can determine that the RRC connection establishment between the IAB node and the host node is completed. Correspondingly, before the IAB node sends MSG5 to the host node, the IAB node can determine that the RRC connection establishment between the IAB node and the host node is not completed.

[0281] Optionally, MSG5 may indicate that the RRC establishment is complete, and accordingly, MSG5 may be replaced with other descriptions, such as an RRC connection establishment completion message.

[0282] It should be understood that the IAB node includes a mobile terminal (MT) and a distributed unit (DU). Generally, when the IAB node works in the IAB mode, the MT and the DU are connected to the same host node, and when the IAB node works in the mobile IAB mode, the MT and the DU can be connected to the same host node or to different host nodes. In any case where the RRC connection between the above-mentioned IAB node and the host node has not been established, or the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or the IAB node has completed the RRC connection establishment with the host node, the host nodes involved are all host nodes connected to the MT in the IAB node.

[0283] Optionally, the host node to which the MT is connected may be referred to as a non-F1-terminating donor, or a radio resource control terminating donor, etc. Correspondingly, the host node to which the DU is connected may be referred to as an F1-terminating donor, or a non-RRC-terminating donor, etc.

[0284] In a possible implementation, in step S302, the IAB node may use the locally acquired information as a basis for determining that the working mode is the IAB mode.

[0285] In an implementation example, the energy consumption of the IAB node when operating in the mobile IAB mode and the IAB mode may be different. Generally, the mobile IAB mode supports more features (such as Figure 2f to Figure 2h The energy consumption corresponding to the mobile IAB mode may be higher than the energy consumption corresponding to the IAB mode. To this end, the IAB node may use its own energy status information as a basis for determining that the working mode is the IAB mode. For example, when the energy status information of the IAB node indicates that the energy load of the IAB node is higher than a certain threshold (or the remaining energy is lower than a certain threshold), the IAB node may determine that the working mode is the IAB mode.

[0286] In another implementation example, the IAB node operates in a mobile IAB mode and the node movement corresponding to the IAB mode may be different. Generally, it is possible that the mobile IAB mode supports movement at a higher speed, and the IAB mode supports movement at a lower speed or does not move (or does not support movement at a higher speed). To this end, the IAB node can use its own mobile state information as a basis for determining that the working mode is the IAB mode. For example, when the mobile state information of the IAB node indicates that the moving speed of the IAB node is lower than a certain threshold, the IAB node can determine that the working mode is the IAB mode. Alternatively, the mobile state information can also be determined based on the number of cell reselections and / or handovers of the IAB-MT within a period of time. When the number of cell reselections and / or handovers of the IAB-MT within a period of time is greater than a certain threshold, the IAB node determines that the working mode is the mobile IAB mode. When the number of cell reselections and / or handovers of the IAB-MT within a period of time is less than or equal to a certain threshold, the IAB node determines that the working mode is the IAB mode.

[0287] In another implementation example, the parent nodes corresponding to the IAB mode and the IAB mode may be different. For example, some parent nodes only support nodes accessing the mobile IAB mode (recorded as the first type of parent nodes), some parent nodes only support nodes accessing the IAB mode (recorded as the second type of parent nodes), and some parent nodes support nodes accessing the mobile IAB mode and support nodes accessing the IAB mode (recorded as the third type of parent nodes). Generally, the parent node can broadcast indication information of nodes supporting access to the mobile IAB mode in the system broadcast information. For example, the indication information sent by the first type of parent node and / or the third type of parent node can be a mobile IAB-support (mobile iab-support) information element carried by the system information block (SIB) 1, and the indication information sent by the second type of parent node can be an IAB-support (iab-support) information element carried by SIB1. Since the IAB node may need to provide network services to the child node through the access link, for this reason, the IAB node generally accesses the parent node with better signal quality. Correspondingly, the IAB node can use the signal quality information of the first type of parent node and / or the third type of parent node as the basis for determining that the working mode is the IAB mode. For example, when the signal quality corresponding to the signal quality information of the first type of parent node and / or the third type of parent node is lower than a certain threshold, the IAB node can determine that it may not be possible to obtain higher quality communication services through the mobile IAB mode at present. For this reason, the IAB node can determine that the working mode is the IAB mode, and access the second type of parent node to obtain communication services through the second type of parent node. Correspondingly, when the signal quality corresponding to the signal quality information of the first type of parent node or the third type of parent node is not lower than a certain threshold, the IAB node determines that the working mode is the mobile IAB mode, and accesses the first type of parent node or the third type of parent node to obtain communication services through the first type of parent node or the third type of parent node.

[0288] In a possible implementation, in step S302, the IAB node may determine that the working mode is the IAB mode based on instructions from other nodes.

[0289] In one implementation example, Figure 3 In the technical solution shown, before step S301, the following steps may also be included:

[0290] S300A. The host node sends second indication information to the IAB node, that is, the second indication information can be carried in an access stratum (AS) message.

[0291] In one implementation example, Figure 3 In the technical solution shown, before step S301, the following steps may also be included:

[0292] S300B. The core network device sends second indication information to the host node.

[0293] S300A. The host node sends second indication information to the IAB node, that is, the second indication information can be carried in a non-access stratum (NAS) message.

[0294] In other words, in step S302, the IAB node determines that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode, including: the IAB node determines that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode based on the second indication information from the host node or the second indication information from the core network element;

[0295] The second indication information indicates at least one of the following information A to information C:

[0296] Information A. The mobile IAB authorization status of the IAB node is unauthorized;

[0297] Information B. The IAB authorization status of the IAB node is authorized;

[0298] Information C: The working mode of the IAB node is the mobile IAB mode and the IAB mode in the IAB mode.

[0299] In an implementation example, taking the second indication information carried in a NAS message as an example, in step S300A, information A received by the host node can be implemented by taking the value of mobile IAB authorized in the NAS message as not authorized, information B received by the host node can be implemented by taking the value of IAB authorized in the NAS message as authorized, and information C received by the host node can be implemented by a newly added element in the NAS message, which is used to indicate that the working mode of the IAB node is the mobile IAB mode and the IAB mode in the IAB mode.

[0300] In another implementation example, taking the second indication information carried in the AS message as an example, the host node may carry at least one of the above information A to information C through an RRC message. In a possible implementation example, the host node does not carry the backhaul link configuration information in the RRC message, which is used to implicitly indicate to the IAB node that the mobile IAB authorization state is unauthorized.

[0301] Optionally, in the case where the second indication information is carried in an AS message, the second indication information may be a result of an autonomous decision made by the host node (as described later). Figure 5The second indication information may be the result of a decision made by a core network element (as described later). Figure 6 Wherein, in the case where the second indication information may be a result of a decision made by a core network element, the core network element may send the decision result of the core network element to the host node through an NG message (e.g., an initial context configuration request (INITIALCONTEXTSETUPREQUEST) message, or a UE context modification request (UECONTEXTMODIFICATIONREQUEST) message), so that the host node determines the second indication information based on the decision result.

[0302] Specifically, the IAB node may receive the second indication information sent by the host node through step S300A, or the IAB node may receive the second indication information from the core network element through steps S300A and S300B, and the second indication information indicates at least one of the above items, so that the IAB node can determine the working mode of the IAB node as the IAB mode in the mobile IAB mode and the IAB mode based on the above at least one item. In other words, the basis for the IAB node to determine that the working mode is the IAB mode may be the indication information provided by the host node or the core network element.

[0303] In one possible implementation, Figure 3 In the technical solution shown, the method also includes:

[0304] Step S303: The IAB node sends first information to the host node, where the first information is used to indicate that the working mode of the IAB node is the IAB mode, so that the host node can determine that the working mode of the IAB node is the IAB mode based on the first information.

[0305] In a possible implementation manner, the first information sent by the IAB node in step S303 satisfies any one of the following conditions A to D:

[0306] Condition A: The first information includes IAB node indication information and does not include mobile IAB node indication information. For example, the first information includes iab-NodeIndication information element but does not include mobile IAB-NodeIndication information element.

[0307] Condition B. The first information includes the IAB node indication information and the mobile IAB node indication information, for example, the first information includes the iab-NodeIndication information element and the mobileIAB-NodeIndication information element. Wherein, for the IAB node and the host node, when it is agreed by configuration or pre-configuration that the first information includes the two information elements, the iab-NodeIndication information element and the mobileIAB-NodeIndication information element, the host node determines that the "iab-NodeIndication information element" is the standard, that is, based on the iab-NodeIndication information element, the working mode of the IAB node is determined to be the IAB mode.

[0308] Condition C: The first information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, and the first indication information is used to indicate the preference for the IAB mode. For example, the first information includes the iab-NodeIndication information element and the preference information (ie, the first indication information), and the preference information is used to indicate the preference for the IAB mode.

[0309] Condition D: The first information includes the first indication information. For example, the first information includes preference information (ie, the first indication information), and the preference information is used to indicate a preference for the IAB mode.

[0310] Therefore, the first information can be implemented in the above-mentioned multiple ways, that is, the host node can determine, based on the above-mentioned multiple ways, that the first information is used to indicate that the working mode of the IAB node is the IAB mode.

[0311] Optionally, the first information sent by the IAB node in step S303 may be carried in MSG5 or other messages (eg, IAB other information (IABOtherInformation)), which is not limited here.

[0312] In a possible implementation, after step S303, the method may further include: the IAB node receives second information from the host node, the second information includes configuration information of the access link of the IAB node and the second information does not include configuration information of the backhaul link of the IAB node, and / or the second information is used to indicate that the mobile IAB authorization state and the IAB authorization state of the IAB node are both unauthorized. Alternatively, the IAB node receives indication information from the host node indicating the release of the RRC connection between the IAB node and the host node. Specifically, for an IAB node that supports mobile IAB mode and IAB mode, when the IAB node indicates through the first information that the working mode of the IAB node is the IAB mode, the host node may believe that the IAB node is abnormal or that the host node does not expect the working mode of the IAB node to be the IAB mode for other reasons (for example, the signal quality of the signal sent by the IAB node is lower than a threshold).

[0313] To this end, when the host node configures the configuration information of the access link of the IAB node through the second information, the second information sent by the host node may not send the configuration information of the backhaul link for the IAB node, thereby preventing the terminal device or other IAB node from accessing the IAB node as a sub-node, so as to avoid affecting the communication between the terminal device and the other IAB node.

[0314] Alternatively, the host node may indicate through the second information that both the mobile IAB authorization state and the IAB authorization state of the IAB node are unauthorized, that is, the IAB-MT remains in the network as an ordinary terminal device, and the IAB-DU does not establish a connection with the F1 interface. It is also possible to avoid the terminal device or other IAB nodes from accessing the IAB node as child nodes to avoid affecting the communication between the terminal device and the other IAB nodes. Optionally, when the second information is used to indicate that both the mobile IAB authorization state and the IAB authorization state of the IAB node are unauthorized, the second information may be carried in a NAS message from a core network element.

[0315] Alternatively, the host node may send an indication message to the IAB node indicating the release of the RRC connection between the IAB node and the host node (for example, through an RRC release message indication). The manner of releasing the RRC connection of the IAB node can also prevent the terminal device or other IAB node from accessing the IAB node as a sub-node, so as to avoid affecting the communication between the terminal device and the other IAB node.

[0316] In a possible implementation, after step S303, the method may further include: the IAB node receives indication information from the host node indicating establishment of an F1 connection between the IAB node and the host node. Specifically, when the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is mobile IAB mode, it is possible that the MT and DU in the IAB node are respectively connected to different host nodes. For this reason, after the host node receives the first information, the host node may send indication information indicating establishment of an F1 connection between the IAB node and the host node, so that the MT and DU in the IAB node can be connected to the same host node, which can avoid communication errors caused by the MT and DU being connected to different host nodes in the IAB node when the working mode is IAB mode.

[0317] In a possible implementation, after step S303, the method may further include: the IAB node sends a request message to the host node requesting to establish an F1 connection between the IAB node and the host node, the request message including an identifier of the host node and / or indication information indicating that the IAB node is authorized to work in the IAB mode. Specifically, when the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, it is possible that the MT and DU in the IAB node are respectively connected to different host nodes. For this reason, after the IAB node sends the first message, the IAB node may also send a request message to the host node requesting to establish an F1 connection between the IAB node and the host node, so that the MT and DU in the IAB node can be connected to the same host node, which can avoid communication errors caused by the MT and DU being connected to different host nodes in the IAB node when the working mode is the IAB mode.

[0318] Optionally, the identifier of the host node is the IP address of the RRCterminating donor. In this case, the F1terminating donor and the RRCterminating donor are the same host node. The IAB node can obtain the IP address of the F1 terminating donor through operation administration and maintenance (OAM). For example, the IAB node requests the IP address of the current F1 terminating donor from the OAM, and the OAM sends the IP address of the current F1 terminating donor to the IP node. Optionally, the IAB node carries the gNB ID of the donor in the message sent to the OAM requesting the IP address of the current F1terminating donor, indicating that the IP address of the donor is requested from the OAM, or carries the indication information that the IAB node works in the IAB mode (such as: mobile IAB authorization failed, and / or IAB authorization passed), and the OAM determines that the IP address of the current RRC terminating donor needs to be sent to the IAB node as the IP address of the F1terminating donor. Alternatively, the IAB node may obtain the IP address of the RRCterminating donor through the RRC terminating CU, for example, the IAB node sends an RRC message to the RRC terminating donor to request an IP address, and the donor sends an RRC message to the IAB node, carrying the IP address of the donor. Alternatively, the IAB node may obtain the IP address of the host node through the F1-terminating donor to which the DU is connected before step S303, which is not limited here.

[0319] based on Figure 3In the technical solution shown, the IAB node may be an IAB node that supports the mobile IAB mode and the IAB mode. In step S301, when the working mode of the IAB node has not been determined (for example, the RRC connection of the IAB node has not been established; for example, the RRC connection of the IAB node has been established and signal transmission has not yet been performed based on the backhaul link), or when the IAB node has determined that the working mode is the mobile IAB mode, the IAB node may determine in step S302 that the working mode of the IAB node is the mobile IAB mode and the IAB mode among the IAB modes. In other words, when the IAB node supports the mobile IAB mode and the IAB mode, the IAB node may serve as the determiner of the working mode of the IAB node, and may flexibly select the working mode of the IAB node as the mobile IAB mode and the IAB mode among the IAB modes. Therefore, for an IAB node that supports mobile IAB mode and IAB mode, it is no longer limited to communicating only through mobile IAB mode, so that the working mode of the IAB node can access the network in IAB mode or switch from mobile IAB mode to IAB mode, so as to improve the flexibility of IAB nodes in communicating in the IAB network.

[0320] See also Figure 4 , is another schematic diagram of the communication method provided in the present application, and the method includes the following steps.

[0321] S401. The IAB node determines that the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode.

[0322] S402. The IAB node determines that the working mode of the IAB node is the mobile IAB mode.

[0323] In a possible implementation, in step S402, the IAB node may use the locally acquired information as a basis for determining that the working mode is the mobile IAB mode.

[0324] In an implementation example, the energy consumption of the IAB node when operating in the mobile IAB mode and the IAB mode may be different. Generally, the mobile IAB mode supports more features (such as Figure 2f to Figure 2h The energy consumption corresponding to the mobile IAB mode may be higher than the energy consumption corresponding to the IAB mode. To this end, the IAB node may use its own energy status information as a basis for determining that the working mode is the mobile IAB mode. For example, when the energy status information of the IAB node indicates that the energy load of the IAB node is lower than a certain threshold (or the remaining energy is higher than a certain threshold), the IAB node may determine that the working mode is the mobile IAB mode.

[0325] In another implementation example, the movement of the node corresponding to the IAB mode and the IAB mode when the IAB node works may be different. Generally, it is possible that the mobile IAB mode supports movement at a higher speed, and the IAB mode supports movement at a lower speed or does not move (or does not support movement at a higher speed). To this end, the IAB node can use its own mobile state information as a basis for determining that the working mode is the IAB mode. For example, when the mobile state information of the IAB node indicates that the moving speed of the IAB node is higher than a certain threshold, the IAB node can determine that the working mode is the mobile IAB mode.

[0326] In another implementation example, the parent nodes corresponding to the IAB mode and the IAB mode may be different. For example, some parent nodes only support nodes accessing the mobile IAB mode (recorded as the first type of parent nodes), some parent nodes only support nodes accessing the IAB mode (recorded as the second type of parent nodes), and some parent nodes support nodes accessing the mobile IAB mode and support nodes accessing the IAB mode (recorded as the third type of parent nodes). Generally, the parent node can broadcast indication information of nodes supporting access to the mobile IAB mode in the system broadcast information. For example, the indication information sent by the first type of parent node and / or the third type of parent node can be a mobile IAB-support (mobile iab-support) information element carried by the system information block (SIB) 1, and the indication information sent by the second type of parent node can be an IAB-support (iab-support) information element carried by SIB1. Since the IAB node may need to provide network services to the child node through the access link, for this reason, the IAB node generally accesses the parent node with better signal quality. Accordingly, the IAB node may use the signal quality information of the second-type parent node as a basis for determining that the working mode is the mobile IAB mode. For example, when the signal quality corresponding to the signal quality information of the second-type parent node is lower than a certain threshold, the IAB node may determine that it may not be possible to obtain a higher quality communication service through the IAB mode at present. To this end, the IAB node may determine that the working mode is the mobile IAB mode, and access the first-type parent node or the third-type parent node to obtain the communication service through the first-type parent node or the third-type parent node.

[0327] In a possible implementation, in step S402, the IAB node may determine that the working mode is the IAB mode based on instructions from other nodes.

[0328] In one implementation example, Figure 4 In the technical solution shown, before step S401, the following steps may also be included:

[0329] S400A. The host node sends third indication information to the IAB node, that is, the third indication information may be carried in an access stratum (AS) message.

[0330] In one implementation example, Figure 4 In the technical solution shown, before step S301, the following steps may also be included:

[0331] S400B. The core network device sends third indication information to the host node.

[0332] S400A. The host node sends third indication information to the IAB node, that is, the third indication information may be carried in a non-access stratum (NAS) message.

[0333] In other words, in step S402, the IAB node determines that the working mode of the IAB node is the mobile IAB mode, including: the IAB node determines that the working mode of the IAB node is the mobile IAB mode based on the third indication information from the host node or the third indication information from the core network element;

[0334] The third indication information indicates at least one of the following information D to information F:

[0335] Information D. The mobile IAB authorization status of the IAB node is authorized;

[0336] Information E. The IAB authorization status of the IAB node is unauthorized;

[0337] Information F: The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0338] In an implementation example, taking the third indication information carried in a NAS message as an example, in step S400A, information A received by the host node can be implemented by taking the value of mobile IAB authorized in the NAS message as authorized (authorized), information B received by the host node can be implemented by taking the value of IAB authorized in the NAS message as not authorized (notauthorized), and information C received by the host node can be implemented by a newly added element in the NAS message, which is used to indicate that the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0339] In another implementation example, taking the third indication information carried in the AS message as an example, the host node may carry at least one of the above information A to information C through an RRC message. In a possible implementation example, the host node carries the backhaul link configuration information in the RRC message, which is used to implicitly indicate to the IAB node that the mobile IAB authorization state is authorized.

[0340] Optionally, when the third indication information is carried in an AS message, the third indication information may be a result of an autonomous decision made by the host node (as described later). Figure 5 The third indication information may be the result of a decision made by a core network element (as described later). Figure 6 Wherein, in the case where the third indication information may be the result of a decision determined by a core network element, the core network element may send the decision result of the core network element to the host node through an NG message (for example, an initial context configuration request (INITIALCONTEXT SETUP REQUEST) message, or a UE context modification request (UE CONTEXT MODIFICATIONREQUEST) message), so that the host node determines the third indication information based on the decision result.

[0341] Specifically, before step S402, the IAB node may receive third indication information sent by the host node, or the IAB node may receive third indication information from the core network element through the host node, and the third indication information indicates at least one of the above items, so that the IAB node can determine that the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode based on the above at least one item. In other words, the basis for the IAB node to determine that the working mode is the mobile IAB mode may be the indication information provided by the host node or the core network element.

[0342] In one possible implementation, Figure 4 In the method shown, the method also includes:

[0343] S403. The IAB node sends third information to the host node, where the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, so that the host node can determine that the working mode of the IAB node is the mobile IAB mode based on the third information.

[0344] In a possible implementation manner, the third information satisfies any one of the following conditions D and E:

[0345] Condition D: The third information includes the mobile IAB node indication information. For example, the third information includes the mobileIAB-NodeIndication information element. In addition, the third information may include the iab-NodeIndication information element, or may not include the iab-NodeIndication information element, which is not limited here.

[0346] Condition E: The third information includes fourth indication information, and the fourth indication information is used to indicate that the mobile IAB mode is preferred. For example, the third information includes preference information (ie, fourth indication information), and the preference information is used to indicate that the mobile IAB mode is preferred.

[0347] Specifically, the third information may be implemented in the above-mentioned multiple ways, that is, the donor node may determine, based on the above-mentioned multiple ways, that the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0348] Optionally, the first information sent by the IAB node in step S303 may be carried in an RRC message, such as MSG5 or IAB Other Information.

[0349] In one possible implementation, Figure 4 In the method shown, the method also includes: the IAB node receives fourth information from the host node, the fourth information indicates switching the child node of the IAB node to other network devices, and / or the fourth information indicates releasing the connection between the IAB node and the first parent node of the IAB node or releasing the connection between the IAB node and the second parent node of the IAB node, wherein the IAB node communicates with the first parent node and the second parent node via dual connection.

[0350] Specifically, the IAB node may support different communication characteristics in different working modes. For example, when the IAB node works in the IAB mode, the IAB node supports dual connection to two different parent nodes and supports access to child nodes; while when the IAB node works in the mobile IAB mode, the IAB node does not support dual connection to two different parent nodes and does not support access to child nodes. To this end, when the IAB node indicates through the third information that the working mode of the IAB node is switched from the IAB mode to the mobile IAB mode, the host node can indicate through the fourth information to switch the child nodes of the IAB node and / or indicate to release one of the dual connections to adapt to the mobile IAB mode of the IAB node, so as to avoid communication errors of the child nodes of the IAB node working in the mobile IAB mode and / or avoid communication errors of the IAB node in the dual connection scenario.

[0351] It should be understood that the child node is another IAB node.

[0352] It should be understood that the first parent node and the second parent node may be different IAB nodes or host nodes. Alternatively, the first parent node and the second parent node may be the same IAB node or host node. Accordingly, the IAB node communicates with the first parent node and the second parent node through dual connections, which can be understood as the IAB node communicating with different cells in the same parent node through dual connections.

[0353] based on Figure 4 In the technical solution shown, when the IAB node determines in step S401 that the IAB node has completed the establishment of the RRC connection with the host node and the working mode of the IAB node is the IAB mode, the IAB node can determine in step S402 that the working mode of the IAB node is the mobile IAB mode. In other words, when the IAB node has determined that the working mode is the IAB mode, the IAB node can determine that the working mode of the IAB node is the mobile IAB mode, that is, the IAB node can be used as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node as the mobile IAB mode and the mobile IAB mode in the IAB mode. Therefore, for the IAB node that supports the mobile IAB mode and the IAB mode, it is no longer limited to communicating only through the mobile IAB mode, so that the working mode of the IAB node can be carried out in the IAB mode, and it can also support the working mode of the IAB node to switch from the IAB mode to the mobile IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0354] See also Figure 5 , is another schematic diagram of the communication method provided in the present application, and the method includes the following steps.

[0355] S501. The host node receives indication information from the IAB node indicating that the IAB node supports the mobile IAB mode.

[0356] S502. The host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0357] In a possible implementation, in step S502, the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on at least one of the following information G to information J.

[0358] Information G. The first information from the IAB node. For example, Figure 5In the method shown, the host node may also receive first information from the IAB node in step S500A, wherein the first information is used to indicate that the working mode of the IAB node is the IAB mode, and the specific implementation of the first information may refer to the relevant implementation process of the above step S303.

[0359] Information H. Third information from the IAB node. For example, Figure 5 In the method shown, the host node may also receive third information from the IAB node in step S500B, wherein the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, and the specific implementation of the first information may refer to the relevant implementation process of the above step S403.

[0360] Information I. The fifth information from the core network element. For example, Figure 5 In the method shown, the host node may also receive fifth information from the IAB node in step S500C. The fifth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. For example, the fifth information may be carried in an NG message (e.g., an initial context configuration request (INITIAL CONTEXT SETUP REQUEST) message, or a UE context modification request (UECONTEXT MODIFICATION REQUEST) message).

[0361] Information J. The mobile state information of the IAB node. In the case where the host node uses the mobile state information of the IAB node as a basis for determination, after the host node receives the mobile state information from the IAB node, the process of the host node determining the working mode of the IAB node based on the mobile state information can refer to the aforementioned Figure 3 and Figure 4 Related description. Optionally, after the mobility status information of the IAB node is determined, the host node may receive an RRC message sent by the IAB node, carrying the mobility status information of the IAB node. For example, the mobility status information of the IAB node may be carried or indicated by a mobility state (mobilityState) information element, and the mobilityState information element may be carried in an RRC recovery complete (RRCResumeComplete) message or an RRC setup complete (RRCSetupComplete) message.

[0362] Specifically, in the process that the host node determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node may determine based on at least one of the above items to improve the flexibility of implementing the solution.

[0363] In one possible implementation, Figure 5 In the method shown, the method may also include:

[0364] S503. The host node sends sixth information to the core network element, where the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. Specifically, after the host node determines in step S502 that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node may also send the sixth information to the core network element, so that the core network element determines the decision result of the host node based on the sixth information.

[0365] Optionally, when the sixth information is used to indicate that the working mode of the IAB node is the IAB mode, the sixth information satisfies any one of the following conditions F to I:

[0366] Condition F: The sixth information includes IAB node indication information and does not include mobile IAB node indication information. For example, the sixth information includes iab-NodeIndication information element but does not include mobile IAB-NodeIndication information element.

[0367] Condition G. The sixth information includes the IAB node indication information and the mobile IAB node indication information. For example, the sixth information includes the iab-NodeIndication information element and the mobileIAB-NodeIndication information element. Among them, for the host node and the core network element, when it is agreed through configuration or pre-configuration that the sixth information includes the two information elements of the iab-NodeIndication information element and the mobileIAB-NodeIndication information element, the core network element determines that the "iab-NodeIndication information element" is the standard, that is, based on the iab-NodeIndication information element, the working mode of the IAB node is determined to be the IAB mode.

[0368] Condition H. The sixth information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, and the first indication information is used to indicate the preference for the IAB mode. For example, the sixth information includes the iab-NodeIndication information element and the preference information (ie, the first indication information), and the preference information is used to indicate the preference for the IAB mode.

[0369] Condition I: The sixth information includes the first indication information. For example, the sixth information includes preference information (ie, the first indication information), and the preference information is used to indicate a preference for the IAB mode.

[0370] Specifically, when the host node determines that the working mode of the IAB node is the IAB mode, the sixth information sent by the host node satisfies any of the above items. Accordingly, the core network element can determine, based on any of the items, that the sixth information is used to indicate that the working mode of the IAB node is the IAB mode.

[0371] Optionally, the sixth information sent by the donor node in step S503 may be carried in an NG message (such as an uplink non-access layer transmission (UPLINK NAS TRANSPORT) message).

[0372] In a possible implementation manner, when the host node determines that the working mode of the IAB node is the IAB mode, the method further includes at least one of the following items (the implementation process of at least one of the following items may refer to the description of the above embodiment):

[0373] The host node sends second information to the IAB node, where the second information includes configuration information of an access link of the IAB node and does not include configuration information of a backhaul link of the IAB node, and / or the second information is used to indicate that both a mobile IAB authorization state and an IAB authorization state of the IAB node are unauthorized;

[0374] The host node sends, to the IAB node, indication information indicating release of the RRC connection between the IAB node and the host node;

[0375] The host node sends second indication information to the IAB node, where the second indication information is used to indicate at least one of the following: the mobile IAB authorization state of the IAB node is unauthorized, the IAB authorization state of the IAB node is authorized, and the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0376] Specifically, when the host node determines that the working mode of the IAB node is the IAB mode, the host node may also enable the subsequent IAB node to implement IAB mode communication based on the at least one of the above interactions.

[0377] In a possible implementation manner, when the donor node determines that the working mode of the IAB node is the mobile IAB mode, the method further includes at least one of the following items (the implementation process of at least one of the following items may refer to the description of the above embodiment):

[0378] The host node sends fourth information to the IAB node, where the fourth information indicates switching a child node of the IAB node to another node, and / or the fourth information indicates releasing a connection between the IAB node and the first parent node or releasing a connection between the IAB node and the second parent node, wherein the IAB node communicates with the first parent node and the second node through a dual connection;

[0379] The host node sends third indication information to the IAB node, and the third indication information indicates at least one of the following: the mobile IAB authorization state of the IAB node is authorized; the IAB authorization state of the IAB node is unauthorized; the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0380] Specifically, when the host node determines that the working mode of the IAB node is the mobile IAB mode, the host node may also enable the subsequent IAB node to implement mobile IAB mode communication based on the at least one of the above interactions.

[0381] based on Figure 5 Technical solution, the host node can receive indication information from the IAB node in step S501 indicating that the IAB node supports the working mode of the mobile IAB mode, and determine that the IAB node can be an IAB node supporting the mobile IAB mode and the IAB mode based on the indication information. Thereafter, the host node can determine in step S502 that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. In other words, when the IAB node supports the mobile IAB mode and the IAB mode, the host node can serve as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node to be one of the mobile IAB mode and the IAB mode. Thus, for the IAB node supporting the mobile IAB mode and the IAB mode, through the decision of the host node, the working mode of the IAB node can be one of the mobile IAB mode and the IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0382] See also Figure 6 , is another schematic diagram of the communication method provided in the present application, and the method includes the following steps.

[0383] S601. The core network element determines that the working modes supported by the IAB node include the mobile IAB mode.

[0384] S602. The core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0385] It should be noted that in step S601, the core network element can determine that the working mode supported by the IAB node includes the mobile IAB mode in a variety of ways. For example, the core network element can receive capability information from the IAB node through the host node, and the capability information can indicate that the IAB node supports the mobile IAB mode. For another example, the core network element can determine that the IAB node supports the mobile IAB mode through the subscription information.

[0386] Optionally, when the working mode supported by the IAB node includes the mobile IAB mode, the working mode supported by the IAB node may also include the IAB mode. In other words, the IAB node supporting the mobile IAB mode may also support the IAB mode.

[0387] In one possible implementation, Figure 6 In the method shown, the core network element may also receive sixth information from the host node in step S600. Accordingly, the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on the sixth information, wherein the sixth information comes from the host node of the IAB node, and the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. Specifically, in the process of the host node determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the host node may be determined based on the sixth information from the host node.

[0388] Optionally, the core network element can use the mobility status information of the IAB node as a basis for determination. After the core network element receives the mobility status information from the IAB node through the host node, the process of the core network element determining the working mode of the IAB node based on the mobility status information can refer to the above-mentioned related description.

[0389] In one possible implementation, Figure 6 In the method shown, in step S602, the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including the following mode A and / or mode B.

[0390] Mode A. The core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on the current time of the IAB node and at least one of the following: a time range in which the IAB node is allowed to work in the mobile IAB mode, a time range in which the IAB node is allowed to work in the IAB mode, a time range in which the IAB node is not allowed to work in the mobile IAB mode, and a time range in which the IAB node is not allowed to work in the IAB mode;

[0391] Method B. The core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on the space where the IAB node is currently located and at least one of the following items: the spatial range in which the IAB node is allowed to work in the mobile IAB mode, the spatial range in which the IAB node is allowed to work in the IAB mode, the spatial range in which the IAB node is not allowed to work in the mobile IAB mode, and the spatial range in which the IAB node is not allowed to work in the IAB mode.

[0392] In one possible implementation, Figure 6 In the method shown, the method also includes:

[0393] Step S603. The core network element sends fifth information to the host node of the IAB node, and the fifth information is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. Specifically, after the core network element determines that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, the core network element may also send the fifth information to the host node, so that the host node determines the decision result of the host node based on the fifth information.

[0394] In an implementation example, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the IAB mode:

[0395] Indication information indicating that the IAB authorization state of the IAB node is authorized;

[0396] Indication information indicating that the mobile IAB authorization state of the IAB node is unauthorized;

[0397] Indication information indicating the IAB mode of the IAB node.

[0398] Specifically, when the core network element determines that the working mode of the IAB node is the IAB mode, the fifth information sent by the core network element satisfies any of the above items. Accordingly, the host node can determine, based on any of the items, that the fifth information is used to indicate that the working mode of the IAB node is the IAB mode.

[0399] In another implementation example, when the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the mobile IAB mode:

[0400] Indication information indicating that the IAB authorization state of the IAB node is unauthorized;

[0401] Indication information indicating that the mobile IAB authorization state of the IAB node is authorized;

[0402] Indication information indicating the mobile IAB mode of the IAB node.

[0403] Specifically, when the core network element determines that the working mode of the IAB node is the mobile IAB mode, the fifth information sent by the core network element satisfies any of the above items. Accordingly, the host node can determine based on any of the items that the fifth information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0404] In a possible implementation manner, when the core network element determines in step S602 that the working mode of the IAB node is the IAB mode, the method further includes:

[0405] S604. The core network element sends second indication information to the IAB node through the host node, and the second indication information is used to indicate at least one of the following: the mobile IAB authorization state of the IAB node is unauthorized, the IAB authorization state of the IAB node is authorized, and the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode. Specifically, when the core network element determines that the working mode of the IAB node is the IAB mode, the core network element may also send the second indication information to the IAB node through the host node, so that the IAB node determines that the working mode of the IAB node is the IAB mode based on the second indication information.

[0406] It should be noted that the implementation process of the second indication information may refer to the implementation process of the above step S303.

[0407] In a possible implementation manner, when the core network element determines in step S602 that the working mode of the IAB node is the mobile IAB mode, the method further includes:

[0408] S605. The core network element sends third indication information to the IAB node through the host node, and the third indication information indicates at least one of the following: the mobile IAB authorization state of the IAB node is authorized; the IAB authorization state of the IAB node is unauthorized; the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode. Specifically, when the core network element determines that the working mode of the IAB node is the mobile IAB mode, the core network element may also send the third indication information to the IAB node through the host node, so that the IAB node determines that the working mode of the IAB node is the mobile IAB mode based on the third indication information.

[0409] It should be noted that the implementation process of the third indication information may refer to the implementation process of the above step S400.

[0410] based on Figure 6 In the technical solution shown, after the core network element determines in step S601 that the IAB node can be an IAB node supporting the mobile IAB mode and the IAB mode, the core network element can determine in step S602 that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode. In other words, in the case where the IAB node supports the mobile IAB mode and the IAB mode, the core network element can serve as the determiner of the working mode of the IAB node, and can flexibly select the working mode of the IAB node to be one of the mobile IAB mode and the IAB mode. Thus, for the IAB node supporting the mobile IAB mode and the IAB mode, through the decision of the core network element, the working mode of the IAB node can be one of the mobile IAB mode and the IAB mode, so as to enhance the flexibility of the IAB node in communicating in the IAB network.

[0411] See also Figure 7 The embodiment of the present application provides a communication device 700, which can implement the functions of the communication device in the above method embodiment (the communication device is an IAB node, a host node or a core network element), and thus can also achieve the beneficial effects of the above method embodiment. In the embodiment of the present application, the communication device 700 can be a communication device, or an integrated circuit or component inside the communication device, such as a chip.

[0412] In a possible implementation, when the device 700 is used to perform the aforementioned Figure 3When the method is executed by the IAB node in the related embodiments, the device 700 includes a processing unit 701; the processing unit 701 is used to determine that the RRC connection between the access backhaul integrated IAB node and the host node has not been established, or, determine that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or, determine that the IAB node has completed the RRC connection establishment with the host node; the processing unit 701 is also used to determine that the working mode of the IAB node is the IAB mode in the mobile IAB mode and the IAB mode.

[0413] In a possible implementation, the device further includes a transceiver unit 702, and the transceiver unit 702 is used to send first information to the donor node, where the first information is used to indicate that the working mode of the IAB node is the IAB mode.

[0414] In a possible implementation, the first information satisfies any of the following: the first information includes IAB node indication information and the first information does not include mobile IAB node indication information; the first information includes the IAB node indication information and the mobile IAB node indication information; the first information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, and the first indication information is used to indicate a preference for the IAB mode; the first information includes the first indication information.

[0415] In one possible implementation, the processing unit 701 is used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode, including: the processing unit 701 is specifically used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode based on the second indication information from the host node or the second indication information from the core network network element; wherein the second indication information indicates at least one of the following: the mobile IAB authorization state of the IAB node is unauthorized; the IAB authorization state of the IAB node is authorized; the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0416] In a possible implementation, when the device 700 is used to perform the aforementioned Figure 4 When the method is executed by the IAB node in the related embodiments, the device 700 includes a processing unit 701; the processing unit 701 is used to determine that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode; the processing unit 701 is also used to determine that the working mode of the IAB node is the mobile IAB mode.

[0417] In a possible implementation, the device further includes a transceiver unit 702, and the transceiver unit 702 is used to send third information to the donor node, and the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

[0418] In one possible implementation, the transceiver unit 702 is used to determine that the working mode of the IAB node is the mobile IAB mode, including: the transceiver unit 702 is specifically used to determine that the working mode of the IAB node is the mobile IAB mode based on the third indication information from the host node or the third indication information from the core network network element; wherein the third indication information indicates at least one of the following: the mobile IAB authorization status of the IAB node is authorized; the IAB authorization status of the IAB node is unauthorized; the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode in the IAB mode.

[0419] In a possible implementation, when the device 700 is used to perform the aforementioned Figure 5 When the method is executed by the host node in the related embodiments, the device 700 includes a processing unit 701 and a transceiver unit 702; the transceiver unit 702 is used to receive indication information from the IAB node indicating that the IAB node supports the working mode of the mobile IAB mode; the processing unit 701 is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0420] In one possible implementation, the processing unit 701 is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit 701 is specifically used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on at least one of the following items, including: first information from the IAB node, third information from the IAB node, fifth information from the core network network element, and mobile status information of the IAB node; wherein the first information is used to indicate that the working mode of the IAB node is the IAB mode, the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, and the fifth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0421] In a possible implementation, the transceiver unit 702 is further configured to send sixth information to a core network element, where the sixth information is configured to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0422] In one possible implementation, when the device 700 is used to execute the method executed by the core network element in any of the aforementioned embodiments, the device 700 includes a processing unit 701; the processing unit 701 is used to determine that the working mode supported by the IAB node includes a mobile IAB mode; the processing unit 701 is also used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0423] In a possible implementation, the transceiver unit 702 is further configured to send fifth information to the host node of the IAB node, where the fifth information is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0424] In one possible implementation, the processing unit 701 is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit 701 is specifically used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode based on sixth information, wherein the sixth information comes from the host node of the IAB node, and the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0425] In a possible implementation, the processing unit 701 is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, including: the processing unit 701 is specifically used to determine that the working mode of the IAB node is the mobile IAB mode; the transceiver unit 702 is also used to send third indication information to the IAB node through the host node, and the third indication information indicates at least one of the following: the mobile IAB authorization status of the IAB node is authorized; the IAB authorization status of the IAB node is unauthorized; the working mode of the IAB node is the mobile IAB mode and the mobile IAB mode among the IAB modes.

[0426] It should be noted that the information execution process and other contents of the units of the above-mentioned communication device 700 can be specifically referred to the description in the method embodiment shown in the above-mentioned application, and will not be repeated here.

[0427] See also Figure 8 , is another schematic structural diagram of a communication device 800 provided in the present application, wherein the communication device 800 includes a logic circuit 801 and an input / output interface 802. The communication device 800 may be a chip or an integrated circuit.

[0428] in, Figure 7 The transceiver unit 702 shown may be a communication interface, which may be Figure 8The input / output interface 802 in the communication interface may include an input interface and an output interface. Alternatively, the communication interface may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0429] Optionally, the logic circuit 801 is used to determine that the RRC connection between the access backhaul integrated IAB node and the host node has not been established, or to determine that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or to determine that the IAB node has completed the RRC connection establishment with the host node; the logic circuit 801 is also used to determine that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode.

[0430] Optionally, the logic circuit 801 is used to determine that the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode; the logic circuit 801 is also used to determine that the working mode of the IAB node is the mobile IAB mode.

[0431] Optionally, the input / output interface 802 is used to receive indication information from the IAB node indicating that the IAB node supports the working mode of the mobile IAB mode; the logic circuit 801 is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0432] Optionally, the logic circuit 801 is used to determine that the working mode supported by the IAB node includes a mobile IAB mode; the logic circuit 801 is further used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

[0433] Among them, the logic circuit 801 and the input and output interface 802 can also execute other steps executed by the IAB node, the host node or the core network element in any embodiment and achieve corresponding beneficial effects, which will not be repeated here.

[0434] In one possible implementation, Figure 7 The processing unit 701 shown can be Figure 8 The logic circuit 801 in.

[0435] Optionally, the logic circuit 801 may be a processing device, and the functions of the processing device may be partially or completely implemented by software. The functions of the processing device may be partially or completely implemented by software.

[0436] Optionally, the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and / or steps in any one of the method embodiments.

[0437] Alternatively, the processing device may include only a processor. A memory for storing a computer program is located outside the processing device, and the processor is connected to the memory via a circuit / wire to read and execute the computer program stored in the memory. The memory and the processor may be integrated together, or may be physically independent of each other.

[0438] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chip (SoC), central processor unit (CPU), network processor (NP), digital signal processor (DSP), microcontroller unit (MCU), programmable logic device (PLD) or other integrated chips, or any combination of the above chips or processors.

[0439] See also Fig. 9 , is a schematic diagram of the structure of the communication device 900 involved in the above embodiments provided in the embodiments of the present application. The communication device 900 may specifically be a communication device as a network device such as an IAB node, a host node or a core network element in the above embodiments. The structure of the communication device may refer to Fig. 9 The structure shown.

[0440] The communication device 900 includes at least one processor 911 and at least one network interface 914. Further optionally, the communication device also includes at least one memory 912, at least one transceiver 913 and one or more antennas 915. The processor 911, the memory 912, the transceiver 913 and the network interface 914 are connected, for example, through a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 915 is connected to the transceiver 913. The network interface 914 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 914 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.

[0441] in, Figure 7 The transceiver unit 702 shown may be a communication interface, which may be Fig. 9 The network interface 914 in the embodiment may include an input interface and an output interface. Alternatively, the network interface 914 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0442] The processor 911 is mainly used to process the communication protocol and communication data, and to control the entire communication device, execute the software program, and process the data of the software program, for example, to support the communication device to perform the actions described in the embodiment. The communication device may include a baseband processor and a central processing unit. The baseband processor is mainly used to process the communication protocol and communication data, and the central processing unit is mainly used to control the entire terminal device, execute the software program, and process the data of the software program. Fig. 9 The processor 911 in the embodiment can integrate the functions of the baseband processor and the central processor. It can be understood by those skilled in the art that the baseband processor and the central processor can also be independent processors, which are interconnected through technologies such as buses. It can be understood by those skilled in the art that the terminal device can include multiple baseband processors to adapt to different network formats, and the terminal device can include multiple central processors to enhance its processing capabilities. The various components of the terminal device can be connected through various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. The central processor can also be described as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data can be built into the processor, or it can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

[0443] The memory is mainly used to store software programs and data. The memory 912 can exist independently and be connected to the processor 911. Optionally, the memory 912 can be integrated with the processor 911, for example, integrated into a chip. Among them, the memory 912 can store program codes for executing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 911. The various types of computer program codes executed can also be regarded as drivers of the processor 911.

[0444] Fig. 9 Only one memory and one processor are shown. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the embodiments of the present application.

[0445] The transceiver 913 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal, and the transceiver 913 can be connected to the antenna 915. The transceiver 913 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 915 can receive radio frequency signals, and the receiver Rx of the transceiver 913 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or the digital intermediate frequency signal to the processor 911, so that the processor 911 further processes the digital baseband signal or the digital intermediate frequency signal, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 913 is also used to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 911, and convert the modulated digital baseband signal or the digital intermediate frequency signal into a radio frequency signal, and send the radio frequency signal through one or more antennas 915. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion processing on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal, and the order of the down-mixing and analog-to-digital conversion processing is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal, and the order of the up-mixing and digital-to-analog conversion processing is adjustable. The digital baseband signal and the digital intermediate frequency signal can be collectively referred to as a digital signal.

[0446] The transceiver 913 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, a device in the transceiver unit for implementing a receiving function may be regarded as a receiving unit, and a device in the transceiver unit for implementing a sending function may be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit, the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0447] It should be noted that Fig. 9 The communication device 900 shown can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment, and achieve the corresponding technical effects of the network device. Fig. 9 The specific implementation methods of the communication device 900 shown can all refer to the description in the aforementioned method embodiment, and will not be described in detail here.

[0448] An embodiment of the present application also provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in the possible implementation methods of the IAB node, host node or core network element in the above embodiments.

[0449] The embodiment of the present application also provides a computer program product (or computer program). When the computer program product is executed by the processor, the processor executes the method of the possible implementation mode of the above-mentioned IAB node, host node or core network element.

[0450] An embodiment of the present application also provides a chip system, which includes at least one processor for supporting a communication device to implement the functions involved in the possible implementation methods of the above-mentioned communication device. Optionally, the chip system also includes an interface circuit, which provides program instructions and / or data for the at least one processor. In one possible design, the chip system may also include a memory, which is used to store the necessary program instructions and data for the communication device. The chip system may be composed of chips, or may include chips and other discrete devices, wherein the communication device may specifically be an IAB node, a host node, or a core network element in the aforementioned method embodiment.

[0451] An embodiment of the present application also provides a communication system, which includes at least two devices among the IAB node, the host node or the core network element in any of the above embodiments.

[0452] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0453] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0454] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0455] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. The terminal chip receives information from the base station, which can be understood as the information is first received by other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the terminal chip by these modules. The terminal chip sends information to the base station, which can be understood as the information is first sent to other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the base station by these modules.

[0456] When the above-mentioned communication device is a chip applied to a base station, the base station chip implements the function of the base station in the above-mentioned method embodiment. The base station chip receives information from the terminal, which can be understood as the information is first received by other modules in the base station (such as a radio frequency module or an antenna), and then sent to the base station chip by these modules. The base station chip sends information to the terminal, which can be understood as the information is sent to other modules in the base station (such as a radio frequency module or an antenna), and then sent to the terminal by these modules.

[0457] It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0458] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0459] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0460] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0461] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that: include: Determine that the radio resource control RRC connection between the access backhaul integrated IAB node and the host node has not been established, or determine that the IAB node has completed the RRC connection establishment with the host node and the working mode of the IAB node is the mobile IAB mode, or determine that the IAB node has completed the RRC connection establishment with the host node; The working mode of the IAB node is determined to be the IAB mode among the mobile IAB mode and the IAB mode.

2. The method according to claim 1, characterized in that The method further comprises: Sending first information to the host node, where the first information is used to indicate that the working mode of the IAB node is the IAB mode.

3. The method according to claim 2, characterized in that The first information satisfies any of the following: The first information includes IAB node indication information and the first information does not include mobile IAB node indication information; The first information includes the IAB node indication information and the mobile IAB node indication information; The first information includes the IAB node indication information, the mobile IAB node indication information and first indication information, wherein the first indication information is used to indicate a preference for the IAB mode; The first information includes the first indication information.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: receiving second information from the host node, wherein the second information includes configuration information of an access link of the IAB node and does not include configuration information of a backhaul link of the IAB node, and / or the second information is used to indicate that both a mobile IAB authorization state and an IAB authorization state of the IAB node are unauthorized.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: receiving indication information from the host node indicating to release the RRC connection between the IAB node and the host node.

6. The method according to any one of claims 1 to 5, characterized in that: The determining that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode includes: Based on the second indication information from the donor node or the second indication information from the core network element, determining that the working mode of the IAB node is the IAB mode between the mobile IAB mode and the IAB mode; The second indication information indicates at least one of the following: The mobile IAB authorization state of the IAB node is unauthorized; The IAB authorization status of the IAB node is authorized; The working mode of the IAB node is the IAB mode among the mobile IAB mode and the IAB mode.

7. A communication method, characterized in that: include: Determining that the IAB node has completed RRC connection establishment with the host node and the working mode of the IAB node is the IAB mode; Determine that the working mode of the IAB node is a mobile IAB mode.

8. The method according to claim 7, characterized in that The method further comprises: Sending third information to the donor node, where the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode.

9. The method according to claim 8, characterized in that The third information satisfies any of the following: The third information includes the mobile IAB node indication information; The third information includes fourth indication information, where the fourth indication information is used to indicate a preference for the mobile IAB mode.

10. The method according to any one of claims 7 to 9, characterized in that: The method further comprises: Receive fourth information from the host node, the fourth information indicating switching a child node of the IAB node to other network devices, and / or the fourth information indicating releasing a connection between the IAB node and a first parent node of the IAB node or releasing a connection between the IAB node and a second parent node of the IAB node, wherein the IAB node communicates with the first parent node and the second parent node via a dual connection.

11. The method according to any one of claims 7 to 10, characterized in that: Determining that the working mode of the IAB node is a mobile IAB mode includes: Based on the third indication information from the donor node or the third indication information from the core network element, determining that the working mode of the IAB node is a mobile IAB mode; The third indication information indicates at least one of the following: The mobile IAB authorization state of the IAB node is authorized; The IAB authorization status of the IAB node is unauthorized; The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode among the IAB modes.

12. A communication method, characterized in that: include: receiving indication information from the IAB node indicating that the IAB node supports a working mode of a mobile IAB mode; The working mode of the IAB node is determined to be one of the mobile IAB mode and the IAB mode.

13. The method according to claim 12, characterized in that The determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode includes: The working mode of the IAB node is determined to be one of the mobile IAB mode and the IAB mode based on at least one of the following: first information from the IAB node, third information from the IAB node, fifth information from a core network element, and mobility status information of the IAB node; The first information is used to indicate that the working mode of the IAB node is the IAB mode, the third information is used to indicate that the working mode of the IAB node is the mobile IAB mode, and the fifth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

14. The method according to claim 12 or 13, characterized in that The method further comprises: Sending sixth information to a core network element, where the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

15. The method according to claim 14, characterized in that When the sixth information is used to indicate that the working mode of the IAB node is the IAB mode, the sixth information satisfies any one of the following items: The sixth information includes IAB node indication information and the sixth information does not include mobile IAB node indication information; The sixth information includes the IAB node indication information and the mobile IAB node indication information; The sixth information includes the IAB node indication information, the mobile IAB node indication information and the first indication information, wherein the first indication information is used to indicate a preference for the IAB mode; The sixth information includes the first indication information.

16. The method according to any one of claims 12 to 15, characterized in that In the case where it is determined that the working mode of the IAB node is the IAB mode, the method further includes at least one of the following: Sending second information to the IAB node, wherein the second information includes configuration information of an access link of the IAB node and does not include configuration information of a backhaul link of the IAB node, and / or the second information is used to indicate that both a mobile IAB authorization state and an IAB authorization state of the IAB node are unauthorized; Sending, to the IAB node, indication information instructing to release the RRC connection between the IAB node and the donor node; Sending second indication information to the IAB node, where the second indication information is used to indicate at least one of the following: The mobile IAB authorization state of the IAB node is unauthorized, The IAB authorization status of the IAB node is authorized, The IAB node working mode is the IAB mode among the mobile IAB mode and the IAB mode.

17. The method according to any one of claims 12 to 16, characterized in that: In the case where it is determined that the working mode of the IAB node is the mobile IAB mode, the method further includes at least one of the following: Sending fourth information to the IAB node, the fourth information indicating switching a child node of the IAB node to another node, and / or the fourth information indicating releasing a connection between the IAB node and a first parent node or releasing a connection between the IAB node and a second parent node, wherein the IAB node communicates with the first parent node and the second node through a dual connection; Sending third indication information to the IAB node, where the third indication information indicates at least one of the following: The mobile IAB authorization state of the IAB node is authorized; The IAB authorization status of the IAB node is unauthorized; The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode among the IAB modes.

18. A communication method, characterized in that: include: Determine that the working modes supported by the IAB node include mobile IAB mode; The working mode of the IAB node is determined to be one of the mobile IAB mode and the IAB mode.

19. The method according to claim 18, characterized in that The method further comprises: Sending fifth information to a host node of the IAB node, wherein the fifth information is used to determine that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

20. The method according to claim 18 or 19, characterized in that The determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode includes: Based on the sixth information, it is determined that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode, wherein the sixth information comes from the host node of the IAB node, and the sixth information is used to indicate that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode.

21. The method according to claim 19 or 20, characterized in that In a case where the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the IAB mode: Indication information indicating that the IAB authorization state of the IAB node is authorized; Indication information indicating that the mobile IAB authorization state of the IAB node is unauthorized; Indication information indicating the IAB mode of the IAB node.

22. The method according to any one of claims 18 to 21, characterized in that In a case where the fifth information includes at least one of the following items, the fifth information is used to determine that the working mode of the IAB node is the mobile IAB mode: Indication information indicating that the IAB authorization state of the IAB node is unauthorized; Indication information indicating that the mobile IAB authorization state of the IAB node is authorized; Indication information indicating a mobile IAB mode of the IAB node.

23. The method according to any one of claims 18 to 22, characterized in that The determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode includes: Determining that the working mode of the IAB node is the IAB mode; The method further comprises: Sending second indication information to the IAB node through the host node, where the second indication information is used to indicate at least one of the following: The mobile IAB authorization state of the IAB node is unauthorized, The IAB authorization status of the IAB node is authorized, The IAB node working mode is the IAB mode among the mobile IAB mode and the IAB mode.

24. The method according to any one of claims 18 to 23, characterized in that The determining that the working mode of the IAB node is one of the mobile IAB mode and the IAB mode includes: Determining that the working mode of the IAB node is the mobile IAB mode; The method further comprises: Sending third indication information to the IAB node through the host node, where the third indication information indicates at least one of the following: The mobile IAB authorization state of the IAB node is authorized; The IAB authorization status of the IAB node is unauthorized; The working mode of the IAB node is the mobile IAB mode and the mobile IAB mode among the IAB modes.

25. A communication device, characterized in that: Comprising means for performing the method as claimed in any one of claims 1 to 24.

26. A communication device, characterized in that: The method comprises at least one processor coupled to a memory; the at least one processor is configured to execute the method according to any one of claims 1 to 24.

27. A readable storage medium, characterized in that: The storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 24 is implemented.

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