Signal receiving and sending method, device and communication system

Abstract

An embodiment of the present application provides a method, device and communication system for receiving and sending a signal. The device for receiving and sending a signal is arranged in an integrated access and backhaul node. The device for receiving and sending a signal includes: a first receiving unit, which receives a first reconfiguration message; and a first sending unit, which sends indication information to a wireless device, wherein the indication information is used to instruct the wireless device to apply the configuration in a second reconfiguration message.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] Integrated access and backhaul (IAB) technology enables 5G RAN to support wireless relay. The integrated access and backhaul node (IAB-node) supports access and backhaul through New Radio (NR). The termination point of NR backhaul on the network side is called IAB-donor, which represents a network device (e.g., gNB) with IAB support. Backhaul can occur through a single hop or multiple hops.

[0003] IAB-node supports the functions of gNB-DU (distributed unit). IAB-node DU is also called IAB-DU. IAB-DU is the end point of the NR access interface to the terminal device (UE) and the next-hop IAB-node, and is also the end point of the F1 protocol to the gNB-CU (central unit) on the IAB-donor.

[0004] In addition to the gNB-DU functionality, the IAB-node also supports a subset of UE functionality, known as the IAB-MT, which includes functions such as the physical layer, layer 2, RRC, and NAS to connect to a gNB-DU of another IAB-node or IAB-donor, to a gNB-CU on an IAB-donor, and to the core network.

[0005] In the IAB topology, the IAB-node under the IAB-donor is connected to the IAB-donor through a hop or multiple hops, and the IAB-donor is the root node (root).

[0006] Figure 1 This is a schematic diagram of the IAB topology. Figure 1 As shown, in the IAB topology 10, the IAB-node 100 includes an IAB-MT functional unit 101 and an IAB-DU functional unit 102. The neighboring nodes on the interface of the IAB-DU functional unit 102 are called child nodes. Figure 1 The neighboring node on the interface of the IAB-MT functional unit 101 is called the parent node. Figure 1 The parent nodes 301, 302 are shown in FIG.

[0007] like Figure 1 As shown, the direction from IAB-node 100 to child nodes 201, 202, 203 is called downstream direction, and the direction from IAB-node 100 to parent nodes 301, 302 is called upstream direction. IAB-donor (not shown) performs centralized resource, topology and routing management for the IAB topology 10.

[0008] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0009] The inventor of the present application has discovered that when an IAB-node is migrated from one parent node to another parent node, how to reconfigure the child nodes and / or terminal devices under the IAB-node is not involved in the prior art.

[0010] In response to at least one of the above problems, an embodiment of the present application provides a method, apparatus and communication system for receiving and sending a signal, wherein an integrated access and backhaul node (IAB-node) receives a first reconfiguration message, and sends an indication message to a wireless device so that the wireless device applies the configuration in a second reconfiguration message, thereby enabling the wireless device to switch or reconfigure.

[0011] According to one aspect of an embodiment of the present application, a signal receiving and sending device is provided, which is arranged in an integrated access and backhaul node, and the signal receiving and sending device includes:

[0012] A first receiving unit, configured to receive a first reconfiguration message; and

[0013] The first sending unit sends indication information to the wireless device, where the indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message.

[0014] According to another aspect of an embodiment of the present application, a signal receiving device is provided, which is arranged in a wireless device, and the signal receiving device includes:

[0015] a receiving unit configured to receive a second reconfiguration message; and

[0016] A third receiving unit receives the indication information.

[0017] The indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message received at the radio resource control layer.

[0018] According to another aspect of an embodiment of the present application, a signal sending device is provided, which is arranged in a source concentration unit, and the signal sending device includes:

[0019] a fourth sending unit, configured to send a first reconfiguration message to the integrated access and backhaul node; and

[0020] A fifth sending unit is configured to send a second reconfiguration message to the wireless device, wherein in the second reconfiguration message, a target candidate cell having the same identifier as the current serving cell of the integrated access and backhaul node is configured once.

[0021] According to another aspect of an embodiment of the present application, a method for receiving and sending a signal is provided, including:

[0022] The integrated access and backhaul node receives a first reconfiguration message; and

[0023] The integrated access and backhaul node sends indication information to the wireless device, where the indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message.

[0024] According to another aspect of an embodiment of the present application, a method for receiving a signal is provided, including:

[0025] The wireless device receives a second reconfiguration message; and

[0026] The wireless device receives indication information, where the indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message received at a radio resource control layer.

[0027] According to another aspect of an embodiment of the present application, a method for sending a signal is provided, including:

[0028] The source concentration unit sends a first reconfiguration message to the integrated access and backhaul node; and

[0029] The source centralized unit sends a second reconfiguration message to the wireless device, wherein in the second reconfiguration message, a target candidate cell having the same identifier as a current serving cell of the integrated access and backhaul node is configured once.

[0030] One of the beneficial effects of the embodiments of the present application is that for an IAB-node that has migrated or is about to migrate, the subnodes and / or terminal devices under the IAB-node can apply the configuration in the second reconfiguration message, thereby performing reconfiguration to correctly communicate with the IAB-donor.

[0031] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0032] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0033] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The elements and features described in one figure or one implementation of the present application embodiment may be combined with the elements and features shown in one or more other figures or implementations. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one implementation.

[0035] Figure 1 It is a schematic diagram of the IAB topology;

[0036] Figure 2 is a schematic diagram of a communication system according to an embodiment of the present application;

[0037] Figure 3 is a schematic diagram of a method for receiving and sending a signal according to an embodiment of the first aspect of the present application;

[0038] Figure 4 is another schematic diagram of the signal receiving and sending method of the present application;

[0039] Figure 5 This is a flow chart of IAB-node 3 performing inter-CU migration;

[0040] Figure 6 This is another flow chart when IAB-node 3 performs inter-CU migration;

[0041] Figure 7 is a schematic diagram of a signal receiving method in an embodiment of the second aspect;

[0042] Figure 8 is a schematic diagram of a signal sending method in an embodiment of the third aspect;

[0043] Fig. 9is another schematic diagram of a signal sending method in an embodiment of the third aspect;

[0044] Fig.10 is another schematic diagram of a signal sending method in an embodiment of the third aspect;

[0045] Fig.11 is a schematic diagram of a signal receiving and sending device of an embodiment of the fourth aspect of the present application;

[0046] Fig.12 is a schematic diagram of a signal receiving device of an embodiment of the fifth aspect of the present application;

[0047] Fig.13 is a schematic diagram of a signal sending device according to an embodiment of the sixth aspect of the present application;

[0048] Fig.14 is another schematic diagram of a signal sending device according to an embodiment of the sixth aspect of the present application;

[0049] Fig.15 is another schematic diagram of a signal sending device according to an embodiment of the sixth aspect of the present application;

[0050] Fig.16 It is a schematic diagram of the structure of an integrated access and backhaul node IAB-node in an embodiment of the seventh aspect of the present application;

[0051] Fig.17 It is a schematic diagram of the structure of the terminal device of the seventh embodiment of the present application. DETAILED DESCRIPTION

[0052] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims.

[0053] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0054] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0055] In an embodiment of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as New Radio (NR), Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed ​​Packet Access (HSPA, High-Speed ​​Packet Access), etc.

[0056] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, such as but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), etc., and / or other communication protocols currently known or to be developed in the future.

[0057] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. The network device may include, but is not limited to, the following devices: an integrated access and backhaul node (IAB-node), a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a gateway, a server, a radio network controller (RNC), a base station controller (BSC), and the like.

[0058] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), etc., and may also include remote radio heads (RRH, Remote Radio Head), remote radio units (RRU, Remote Radio Unit), relays or low-power nodes (such as femeto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographical area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0059] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. The terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and the like.

[0060] Among them, the terminal device may include but is not limited to the following devices: cellular phone, personal digital assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, cordless phone, smart phone, smart watch, digital camera, etc.

[0061] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measuring, such as but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device to device (D2D) terminal, machine to machine (M2M) terminal, and the like.

[0062] In addition, the term "network side" or "network device side" refers to one side of the network, which may be a base station, or may include one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to one side of the user or terminal, which may be a UE, or may include one or more terminal devices as described above.

[0063] In the following description, the terms "uplink control signal" and "uplink control information (UCI)" or "physical uplink control channel (PUCCH)" may be used interchangeably, and the terms "uplink data signal" and "uplink data information" or "physical uplink shared channel (PUSCH)" may be used interchangeably without causing confusion;

[0064] The terms “downlink control signal” and “downlink control information (DCI)” or “physical downlink control channel (PDCCH)” are interchangeable, and the terms “downlink data signal” and “downlink data information” or “physical downlink shared channel (PDSCH)” are interchangeable.

[0065] In addition, sending or receiving PUSCH can be understood as sending or receiving uplink data carried by PUSCH, sending or receiving PUCCH can be understood as sending or receiving uplink information carried by PUCCH, and sending or receiving PRACH can be understood as sending or receiving preamble carried by PRACH; uplink signals can include uplink data signals and / or uplink control signals, etc., and can also be referred to as uplink transmission (UL transmission) or uplink information or uplink channels. Sending uplink transmission on uplink resources can be understood as sending the uplink transmission using the uplink resources. Similarly, downlink data / signals / channels / information can be understood accordingly.

[0066] In the embodiment of the present application, the high-level signaling may be, for example, a radio resource control (RRC) signaling; for example, an RRC message, including, for example, MIB, system information, a dedicated RRC message; or an RRC IE (RRC information element). The high-level signaling may also be, for example, a MAC (Medium Access Control) signaling; or a MAC CE (MAC control element). However, the present application is not limited thereto.

[0067] 3GPP agrees that during IAB node migration, all parent-child relationships are assumed to be preserved at the new IAB-donor. For IAB-MT, if there is no special instruction, the Conditional Handover (CHO) introduced in Rel-16 should also be supported.

[0068] Based on the assumption that all parent-child relationships are preserved at the new IAB-donor, the network topology of a migrating IAB-node and the terminal equipment (UE) or subordinate IAB-node (descendent IAB-node or downstream IAB-node or child IAB-node, etc.) it serves may not change before and after the migration. In this case, the UE / descendent IAB-node may need to update the security key due to the change of the IAB-donor CU.

[0069] For any IAB-node, similar to normal UE, CHO or conditional reconfiguration will benefit the robustness of an IAB-node during inter-donor migration. In addition, when an IAB-node triggers migration from one parent IAB-node to another parent IAB-node under a different IAB-donor, the migrated IAB-node can no longer receive packets for its UE or child IAB-node, including handover command (handovercommand or RRC reconfiguration with reconfiguration with sync) or RRC reconfiguration, so these child IAB-nodes can trigger migration by using CHO. Otherwise, the migrated IAB-node may need to wait for its UE or child IAB-node migration to complete before performing the migration, which will take a long time and may increase the risk of handover failure caused by too late handover.

[0070] In the normal handover process, when the UE receives the RRC reconfiguration (carrying reconfiguration withsync) message, it starts the handover process. In Rel-16CHO, the network configures the UE with one or more conditions (condExecutionCond) corresponding to the candidate target cells (SpCell) and their corresponding conditional RRC reconfiguration (condRRCReconfig) in the conditional reconfiguration. The UE evaluates the conditions corresponding to each configured candidate target cell. If the conditions corresponding to a target candidate cell (i.e., measurement event) are met, the UE initiates conditional reconfiguration to the cell and applies the conditional reconfiguration related to the cell.

[0071] The RRC reconfiguration message of conditional switching or reconfiguration includes ConditionalReconfiguration IE (conditional reconfiguration), and the ConditionalReconfiguration IE includes condReconfigToAddModList IE (conditional reconfiguration add modification list), which includes one or more CondReconfigToAddMod (conditional reconfiguration add modification), as shown in Table 1 below.

[0072] Table 1

[0073]

[0074] A CondReconfigToAddMod IE includes condReconfigId (conditional reconfiguration identifier), condExecutionCond (condition) and condRRCReconfig (conditional RRC reconfiguration). Among them, condRRCReconfig includes relevant information of the target candidate cell, such as physical cell identifier (PCI), frequency, etc.

[0075] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0076] Figure 2 FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating the migration of an IAB-node in an IAB topology. Figure 2As shown, IAB-node 3 is initially connected to IAB-node 1 and source IAB-donor. For purposes such as load balancing, IAB-node 3 needs to be migrated to IAB-node 2 (i.e., the parent node of IAB-node 3 is changed from IAB-node 1 to IAB-node 2). IAB-node 2 is connected to target IAB-donor. Target IAB-donor and Source IAB-donor are different central units (CU). The migration process of IAB-node 3 can use handover (handover or RRC reconfiguration with reconfiguration with sync) or conditional handover (CHO) or other reconfigurations. In addition, Source IAB-donor and Target IAB-donor can communicate through the Xn interface.

[0077] exist Figure 2 In the migration shown, the Source IAB-donor and the Target IAB-donor of IAB-node 3 are different before and after the migration, so this migration is an inter-CU migration.

[0078] In the scenario of the embodiment of the present application, it may also be intra-CU migration, for example, Figure 2 In the example, IAB-node 2 and IAB-node 1 are both child nodes of Source IAB-donor.

[0079] Embodiments of the first aspect

[0080] In some cases, when an IAB-node migrates from one parent node to another, if the child nodes and / or terminal devices under the IAB-node cannot be reconfigured in time, the communication between these child nodes and / or terminal devices and the IAB-donor or IAB-CU will be affected.

[0081] For example, in Figure 2In the inter-CU migration scenario shown, when IAB-node 3 migrates to TargetIAB-donor, the physical cell identifier (PCI) and frequency of the cell served by IAB-node 3 may remain unchanged. If the terminal devices UE1, UE2 and IAB-node 4 served by IAB-node 3 are still under the coverage of the original cell, the connection relationship between UE1, UE2 and IAB-node 4 and IAB-node 3, as well as the connection relationship between UE3 and IAB-node 4 may remain unchanged. If the network configures CHO for UE1, UE2, UE3 and IAB-node 4, then even if IAB-node 3 migrates, the measurement events included in the conditional reconfiguration of UE1, UE2, UE3 and IAB-node 4 may not be met (because the quality of the current serving cell may change little, and there may be no neighboring cell that meets the measurement event), then UE1, UE2, UE3 and IAB-node 4 will not initiate a switching or reconfiguration process to perform operations such as updating keys, so UE1, UE2, UE3 and IAB-node 4 may fail to communicate with the new CU (located in Target IAB-donor).

[0082] For another example, in some intra-CU migration scenarios, UE1, UE2, UE3 and IAB-node 4 under IAB-node 3 may also be unable to communicate correctly with CU due to the migration of IAB-node 3. For example, CU updates the configuration of the PDCP layer of UE1, UE2, UE3 or IAB-node 4 or updates the configuration of DU of IAB-node 3, etc. Therefore, UE1, UE2, UE3 and IAB-node 4 need to initiate a switching or reconfiguration process to update the configuration in order to communicate correctly with CU and / or IAB-node 3.

[0083] At least to address this problem, an embodiment of the present application provides a method for receiving and sending a signal.

[0084] Below, Figure 2 Take the inter-CU migration scenario as an example. Figure 2 The method for receiving and sending signals of the embodiment of the first aspect of the present application is illustrated on the side of the IAB-node 3. It should be noted that the method for receiving and sending signals of the embodiment of the first aspect of the present application is not limited to the scenario of inter-CU migration, and the method is also applicable to the scenario of intra-CU migration.

[0085] Figure 3 is a schematic diagram of a method for receiving and sending a signal according to an embodiment of the present application, such as Figure 3 As shown, the method includes:

[0086] Operation 301, an integrated access and backhaul node (ie, IAB-node 3) receives a first reconfiguration message; and

[0087] Operation 302: The integrated access and backhaul node sends indication information to a wireless device, where the indication information is used to instruct the wireless device to apply a configuration in a second reconfiguration message.

[0088] It is worth noting that the above Figure 3 The embodiments of the present application are only schematically described, but the present application is not limited thereto. For example, the execution order of the various operations can be appropriately adjusted, and other operations can be added or some operations can be reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above appended Figure 3 For example, operation 301 may also be after operation 302.

[0089] According to an embodiment of the first aspect of the present application, the IAB-node receives a first reconfiguration message, and sends indication information to the wireless device so that the wireless device applies the configuration in the second reconfiguration message, thereby enabling the wireless device to switch or reconfigure.

[0090] In at least one embodiment, the integrated access and backhaul node (i.e., IAB-node 3) in operation 301 may be a migrated IAB-node, or an IAB-node that is being reconfigured (for example, relevant parameters of the IAB-node are reconfigured, or migration is not performed), or an IAB-node that changes the connected CU, or an IAB-node that performs security configuration (for example, updating security keys, etc.), etc. The IAB-node here may be an IAB-MT.

[0091] In at least one embodiment, the first reconfiguration message in operation 301 may be a reconfiguration message received by the parent node IAB-node 1 of IAB-node 3 from the Source IAB-donor and forwarded to IAB-node 3. For example, the first reconfiguration message is a radio resource control reconfiguration (RRC Reconfiguration) message, which may or may not carry reconfiguration with sync, or the radio resource control reconfiguration (RRC Reconfiguration) message includes conditional reconfiguration or CHO. In the case where the RRC Reconfiguration message carries reconfiguration with sync, IAB-node 3 performs a handover process or a migration process to the target cell. In the case where the RRC Reconfiguration message does not carry reconfiguration with sync, IAB-node 3 performs a reconfiguration process. In the case where the RRC Reconfiguration message includes conditional reconfiguration or CHO, IAB-node 3 evaluates whether a specific condition is met, and performs conditional reconfiguration or CHO to the corresponding target cell when the condition is met. In the case where the RRC Reconfiguration message includes security information (such as key configuration), IAB-node 3 performs security-related configuration. In addition, it should be noted that in at least one embodiment, Figure 2 As shown, when the IAB-node 3 receives the first reconfiguration message, the IAB-node 3 may or may not complete the migration.

[0092] In at least one embodiment, the wireless device in operation 302 may be a terminal device served by IAB-node 3. For example, the wireless device may be Figure 2 The wireless device may be a UE1 or UE2 served by the IAB-node 3, or an access and backhaul node or a downlink (downstream) IAB-node or a sub-IAB-node of the next level integrated by the IAB-node 3. For example, the wireless device may be Figure 2 Downstream IAB-node 4 of IAB-node 3.

[0093] The second reconfiguration message may be a radio resource control reconfiguration (RRC Reconfiguration) message, such as a conditional RRC Reconfiguration message. In operation 302, the timing at which the IAB-node 3 sends the indication information to the wireless device is one of the following timings:

[0094] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied; for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0095] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0096] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0097] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0098] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0099] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention, for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0100] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0101] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0102] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0103] In at least some embodiments, the indication information sent in operation 302 enables or prohibits the wireless device from: applying the configuration in the second reconfiguration message, or initiating execution of conditional reconfiguration, or performing migration, or changing CU, etc.

[0104] Taking the inter-CU migration of IAB-node 3 as an example, before the migration of IAB-node 3, the Source IAB-donor or Source CU can send a handover request message to the Target IAB-donor or Target CU, which carries, for example, the context of all terminal devices, the context of all IAB-MTs, the context of all IAB-DUs, backhaul and topology-related information, and IP address information. The context of the terminal device may include information such as the physical cell identifier (PCI) of the source cell where the terminal device (e.g., UE1, UE2) is located, and the context of the IAB-MT may include information such as the physical cell identifier (PCI) of the source cell where the IAB-node (e.g., IAB-node 4) is located. After receiving the handover request, the Target IAB-donor or Target CU sends a handover request confirmation message to the Source IAB-donor or Source CU, which may include a configuration corresponding to the PCI of the source cell of the terminal device and / or a configuration corresponding to the PCI of the source cell of the IAB-node. After receiving the configuration, the Source IAB-donor or Source CU may set conditions corresponding to the cell, and include the conditions and configuration corresponding to the cell in sending a second reconfiguration message to the wireless device (ie, the current wireless device UE1, UE2 or IAB-node 4).

[0105] In at least some embodiments, in the second reconfiguration message (e.g., in ServingCellConfigCommon included in reconfigurationWithSync), a target candidate cell having the same identifier as the cell of the UE or downlink IAB-node served by IAB-node 3 (i.e., the serving cell of the wireless device UE1, UE2, UE3 or IAB-node 4 at present) is configured once or appears once. For example, the identifier may be a PCI or a cell identifier (cellID) or a cell global identity (CGI) or a cell global identifier (ECGI), etc. Thus, the indication information enables the wireless device to apply the configuration of the target candidate cell having the same identifier as the current serving cell in the second reconfiguration message.

[0106] For example, after the wireless device (for example, UE1, UE2, UE3 or IAB-node 4) receives the indication information sent by IAB-node 3, it initiates conditional reconfiguration, and the applied condRRCReconfig is the condRRCReconfig corresponding to the PCI of the current serving cell of the IAB-node 3, that is, the physical cell identifier (PCI) indicated in the ServingCellConfigCommon included in the reconfigurationWithSync in the RRC reconfiguration message is the condRRCReconfig of the physical cell identifier of the current serving cell.

[0107] In addition, the present application may not be limited to this. In at least some embodiments, in the second reconfiguration message (for example, in ServingCellConfigCommon included in reconfigurationWithSync), the target candidate cell with the same identifier as the cell of the UE served by IAB-node3 or the downlink IAB-node (that is, the serving cell of the wireless device UE1, UE2 or IAB-node 4 currently) is configured more than twice (that is, appears more than twice) or is not configured (that is, does not appear).

[0108] In at least some other embodiments, the indication information in operation 302 indicates information of a centralized unit (CU), where the centralized unit refers to a centralized unit to which the IAB-node 3 is to be connected or has been connected based on the first reconfiguration message. For example, in the case of inter-CU migration, the centralized unit may be Figure 2 Target IAB-donor CU in.

[0109] The information of the centralized unit includes at least one of the following information: an identifier of the centralized unit; an index of the centralized unit; at least a part of the Internet Protocol (IP) address and / or the network equipment identifier (gNB Identifier (gNBID)) of the centralized unit (for example, the most significant bit MSB or the least significant bit LSB); a cell identity (Cellidentity) of the centralized unit or at least a part of the cell identity (for example, the most significant bits MSBs of the Cell identity); at least a part of the public land mobile network identification information (PLMN-IdentityInfo) of the centralized unit; and at least a part of the common gateway interface (CGI).

[0110] In at least some other embodiments, the second reconfiguration message may include the information of the centralized unit and the configuration corresponding to the information of the centralized unit. Thus, when the wireless device (e.g., UE1, UE2, or IAB-node 4) receives the indication information sent by IAB-node 3 and the second reconfiguration message, it can use the configuration corresponding to the information of the centralized unit in the second reconfiguration message according to the information of the centralized unit in the indication information, and apply the configuration.

[0111] In at least some further embodiments, the indication information may indicate a configuration applied by the wireless device (eg, condRRCReconfig).

[0112] In addition, since the RRC function is located in the IAB-donor CU and the IAB-node does not have the RRC function, the migrated IAB-node 3 cannot parse the configuration in the second reconfiguration message received by the wireless device (e.g., UE1, UE2, UE3, or IAB-node 4) under IAB-node 3. Therefore, IAB-node 3 can determine the configuration (e.g., condRRCReconfig) applied by the wireless device through the correspondence indication information, and then indicate the determined configuration to the wireless device.

[0113] like Figure 3 As shown, the data receiving and sending method may also include:

[0114] Operation 303: IAB-node 3 receives corresponding relationship indication information.

[0115] For example, the corresponding relationship indication information in operation 303 is used to indicate:

[0116] The correspondence between the configuration identification information (e.g., CondReconfigId or MeasId, etc.) in the second reconfiguration message (e.g., conditional RRC reconfiguration) and the identification information of the target cell (e.g., PCI of the target cell) in the first reconfiguration message; or, the correspondence between the configuration identification information (e.g., CondReconfigId or MeasId, etc.) in the second reconfiguration message (e.g., conditional RRCreconfiguration) and the configuration identification information (e.g., CondReconfigId or MeasId, etc.) in the first reconfiguration message.

[0117] For another example, the corresponding relationship indication information in operation 303 is used to indicate:

[0118] The correspondence between the target cell (or target candidate cell) and the configuration identification information (e.g., CondReconfigId or MeasId, etc.) or configuration (e.g., condRRCReconfig) included in the second configuration message (e.g., conditional RRCreconfiguration), wherein IAB-node 3 can receive an F1-C message (e.g., UEContext Modification Request), and the F1-C message includes the correspondence indication information.

[0119] It is worth noting that the order of operation 301, operation 302, and operation 303 may not be limited to Figure 3 As shown, for example: operation 303 may also be before operation 301 or operation 302; or, operation 303 may also be included in operation 301, that is, IAB-nide 3 receives the first reconfiguration message and the corresponding relationship indication information at the same time.

[0120] In an embodiment of the first aspect of the present application, IAB-node 3 may send indication information to the wireless device (e.g., UE1, UE2, UE3 or IAB-node 4) by backhauling a BAP PDU, a radio link layer control protocol data unit (RLC PDU), a media access control element (MAC CE), a media access control subheader (MAC subheader) or physical layer signaling.

[0121] In some embodiments, a new backhaul adaptive control protocol data unit (BAP control PDU) can be defined to send the indication information. For example, the BAP control PDU can use a new PDU type to identify that it is used to send the indication information, and / or the BAP control PDU can contain information of a CU of 8 bits, 16 bits, 24 bits, etc.

[0122] For example, the format of the BAP control PDU may be as shown in Table 2 below. In Table 2, the D / C field is 1 bit, indicating whether the corresponding BAP PDU is a BAP data PDU or a BAP control PDU, and the PDU type is, for example, 3 bits, indicating the type of control information included in the BAP control PDU. R is a reserved bit.

[0123] Table 2

[0124] D / C PDU type R R R

[0125] For another example, the format of the BAP control PDU may also be shown in the following Table 3. In Table 3, in addition to the fields shown in Table 2, the BAP control PDU also includes CU information, such as CU ID. The CU ID shown in Table 3 is 8 bits. In addition, the CU ID may also be 16 bits or 24 bits.

[0126] Table 3

[0127]

[0128] In some embodiments, a new radio link layer control protocol data unit (RLC control PDU) may be defined for sending the indication information. For example, the RLC control PDU may use a new Control PDUType (CPT) to identify that it is used to send the indication information, and / or the BAP control PDU may include information of a CU of 8 bits, 16 bits, 24 bits, etc.;

[0129] In some embodiments, a new media access control information element (MAC CE) may be defined to send the indication information. The MAC CE may correspond to a new logical channel identifier (LCID in subheader) located in the subheader. For example, when the indication information includes CU information, the MAC CE may include 8-bit, 16-bit, or 24-bit CU information. The MAC CE may also be 8-bit, 16-bit, or 24-bit in length.

[0130] In some embodiments, a media access control subheader (MAC subheader) may have a new LCID, which can be used to send the indication information. For example, when the indication information is used to instruct the wireless device to enable the configuration in the second reconfiguration, the wireless device receives the MAC subheader including the LCID, and then applies the configuration in the second reconfiguration.

[0131] In some embodiments, the physical layer signaling may be a field in the downlink control information (DCI), and the field in the DCI is used to send the indication information. The field in the DCI may be, for example, a group common DCI (group common DCI), a common DCI (common DCI) or a terminal device-specific DCI (UE-specific DCI), etc. For example, when the indication information is used to indicate that the wireless device enables the configuration in the second reconfiguration, a 1-bit field may be added to the DCI for sending the indication information. In addition, the DCI may also be a paging DCI (paging DCI), etc.

[0132] In an embodiment of the first aspect of the present application, Figure 3 As shown, the signal receiving and sending method may also include:

[0133] Operation 304: The integrated access and backhaul node further forwards the second reconfiguration message to the wireless device.

[0134] For example, IAB-node 3 may receive the second reconfiguration message from Source IAB-donar, and forward the second reconfiguration message to the wireless device (eg, UE1, UE2, UE3, or IAB-node 4).

[0135] It is worth noting that the order of operation 301, operation 302, operation 303, and operation 304 may not be limited to Figure 3 As shown, for example: operation 304 may also be before operation 301 or operation 302 or operation 303; or, operation 304 may also be included in operation 301 or operation 303.

[0136] Figure 4 FIG. 1 is another schematic diagram of the signal receiving and sending method of the present application. Figure 4 The method shown is similar to Figure 3 The difference between the methods shown is that Figure 4 Instead of operation 304 , there are operations 305 and 306 .

[0137] Operation 305: The integrated access and backhaul node stores a second reconfiguration message; and

[0138] Operation 306: The integrated access and backhaul node sends the second reconfiguration message to the wireless device.

[0139] exist Figure 4 In the method, IAB-node 3 stores the received second reconfiguration message, and sends the second reconfiguration message to the wireless device (eg, UE1, UE2, UE3 or IAB-node 4) during or after the migration.

[0140] It is worth noting that the order of operation 301, operation 302, operation 303, operation 305, and operation 306 may not be limited to Figure 4 As shown, for example: operation 305 and operation 306 may also be before operation 301 or operation 302 or operation 303; or, operation 305 is before operation 301 or operation 302, and operation 306 is included in operation 302.

[0141] In operation 306, the timing at which the IAB-node 3 sends the second reconfiguration message to the wireless device may be one of the following timings:

[0142] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0143] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0144] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0145] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0146] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0147] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0148] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0149] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0150] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0151] exist Figure 4 In the method shown, the timing when IAB-node 3 sends the second reconfiguration message to the wireless device can be the same as the timing when IAB-node 3 sends the indication information to the wireless device, that is, IAB-node 3 sends the second reconfiguration message and the indication information to the wireless device at the same time, or includes the second reconfiguration message and the indication information in one message. Thus, sending resources can be saved.

[0152] In addition, Figure 4 In the method shown, the timing when IAB-node 3 sends the second reconfiguration message to the wireless device may be different from the timing when IAB-node 3 sends the indication information to the wireless device, thereby providing greater flexibility in the sending timing.

[0153] Figure 5 This is a flow chart of IAB-node 3 performing inter-CU migration. Figure 5 As shown, the process includes the following operations:

[0154] 1. The Source IAB donor makes a CHO decision for UE1, UE2 and / or IAB-node 4, and makes a migration decision for IAB-node 3, for example, using a CHO or a switching process to prepare for the migration of IAB-node 3 and its served UEs and / or IAB-nodes (IAB-MT) to the Target IAB donor;

[0155] 2. Source IAB donor sends a handover request to Target IAB donor;

[0156] 3. Target IAB donor sends a request to the target parent node IAB-node 2 of IAB-node 3, where the request is, for example, a UE context setup request (UE context setup req);

[0157] 4. IAB-node 2 sends a response to the request of operation 3, such as a UE context setup response (UE context setup resp);

[0158] 5. The Target IAB donor sends a handover request confirmation message to the Source IAB donor, for example, handover Request Acknowledge;

[0159] 6. Source IAB donor sends a request to IAB-node 3, where the request is, for example, a UE context modification request (UE context modification req), and the request may include second configuration information, such as RRCReconfiguration;

[0160] 7. IAB-node 3 forwards the second configuration information (eg, RRC Reconfiguration) to the wireless device (eg, UE1, UE2, or IAB-node 4). Operation 7 corresponds to Figure 3 Operation 304;

[0161] 8. IAB-node 3 sends a response to the Source IAB donor, the response being, for example, a UE context modification response (UE context modification resp);

[0162] 9. The wireless device (e.g., UE1, UE2, or IAB-node 4) sends a second configuration completion message, such as RRC reconfiguration complete, to IAB-node 3;

[0163] 10. IAB-node 3 sends an uplink radio resource control message transfer message, such as UL RRC Message Transfer, to the Source IAB donor.

[0164] exist Figure 5 In the process shown, IAB-node 3 can perform conditional handover (CHO) shown in 11A or handover (HO) shown in 11B.

[0165] like Figure 5 As shown, the conditional switching (CHO) shown in 11A includes the following operations:

[0166] 11a. Source IAB donor sends a request to source parent node IAB-node 1 of IAB-node 3, where the request is, for example, UE context modification req;

[0167] 12a. IAB-node 1 sends first configuration information to IAB-node 3, where the first configuration information is, for example, RRCReconfiguration;

[0168] 13a.IAB-node 1 sends a response to Source IAB donor, the response being, for example, a UE context modification response (UE context modification resp);

[0169] 14a. IAB-node 3 sends a first configuration information reception completion response to IAB-node 1, where the first configuration completion message is, for example, RRC reconfiguration complete;

[0170] 15a.IAB-node 1 sends an uplink radio resource control message transfer (UL RRC Message Transfer) to Source IAB donor;

[0171] 16a. IAB-node 3 evaluates the handover condition (Evaluate HO condition).

[0172] like Figure 5 As shown, the handover (HO) shown in 11B includes the following operations:

[0173] 11b. Source IAB donor sends a request to source parent node IAB-node 1 of IAB-node 3, where the request is, for example, a UE context modification request (UE context modification req);

[0174] 12b. IAB-node 1 sends first configuration information to IAB-node 3, where the first configuration information is, for example, RRCReconfiguration;

[0175] 13b. IAB-node 1 sends a response to the Source IAB donor, where the response is, for example, a UE context modification response (UE context modification resp).

[0176] like Figure 5 As shown in the figure, the migration process also includes the following operations:

[0177] 12. When the result of evaluating the handover condition in 16a of operation 11A is that the handover condition is satisfied, or when operation 11B is completed, in operation 12, IAB-node 3 detaches from the Source IAB donor, applies the configuration in the first configuration information, and performs a random access procedure (detach from source, apply the stored configuration, RACH) to the target / new parent node;

[0178] 13. IAB-node 3 sends first configuration information configuration completion information to the new parent node IAB-node 2. The first configuration information configuration completion information may be, for example, RRC reconfiguration complete;

[0179] 14. IAB-node 2 sends an uplink radio resource control message transfer (UL RRC Mes sage Transfer) to Target IAB-donor;

[0180] 15a, 15b. IAB-node 3 may send indication information to a wireless device (e.g., UE1, UE2, or IAB-node 4) at one of a plurality of occasions, for example, the occasion shown in 15a is when IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, and the occasion shown in 15b is when IAB-node 3 sends a reconfiguration completion based on the first reconfiguration message, wherein the indication information enables or prohibits the wireless device from applying the configuration in the second reconfiguration message, or the indication information indicates information of a Target IAB donor (Target CU);

[0181] 16. The wireless device (e.g., UE1, UE2, UE3 or IAB-node 4) evaluates the handover condition (Evaluate HO condition);

[0182] 17. Upon receiving the indication information, the wireless device (eg, UE1, UE2 or IAB-node 4) applies the configuration in the second configuration information, and sends second configuration information configuration completion information, eg, RRC reconfiguration complete, to IAB-node 3 after the configuration is applied.

[0183] 3a. Target IAB donor sends a request to IAB-node 3, the request is, for example, a UE context setup request (UE context setup req);

[0184] 4a. IAB-node 3 sends a response to the Target IAB donor in response to the request of operation 3a. The response is, for example, a UE context setup resp.

[0185] 5a. IAB-node 3 sends an uplink radio resource control message transfer (UL RRC Message Transfer) to the Target IAB donor. The UL RRC message transfer may include second configuration information configuration completion information (RRC reconfiguration complete for UE / descent IAB nodes) for the wireless device (eg, UE1, UE2 or IAB-node 4).

[0186] Figure 6 This is another flowchart when IAB-node 3 performs inter-CU migration. Figure 6 As shown, the process includes the following operations:

[0187] 1. The Source IAB donor makes a CHO decision for UE1, UE2 and / or IAB-node 4, and makes a migration decision for IAB-node 3, for example, using a CHO or a switching process, and prepares to migrate IAB-node 3 and its served UEs and / or IAB-nodes (IAB-MT) to the Target IAB donor;

[0188] 2. Source IAB donor sends a handover request to Target IAB donor;

[0189] 3. Target IAB donor sends a request to the target parent node IAB-node 2 of IAB-node 3, where the request is, for example, a UE context setup request (UE context setup req);

[0190] 4. IAB-node 2 sends a response to the request of operation 3, such as a UE context setup response (UE context setup resp);

[0191] 5. The Target IAB donor sends a handover request confirmation message to the Source IAB donor, for example, handover Request Acknowledge;

[0192] 6. Source IAB donor sends a request to IAB-node 3, where the request is, for example, a UE context modification request (UE context modification req), and the request may include second configuration information, such as RRCReconfiguration;

[0193] 7. IAB-node stores the second configuration information, corresponding to Figure 4 Operation 305;

[0194] 8. IAB-node 3 sends a response to the Source IAB donor, the response being, for example, a UE context modification response (UE context modification resp);

[0195] exist Figure 6In the process shown in FIG. 9A , IAB-node 3 can perform the conditional handover (CHO) shown in FIG. 9A or the handover (HO) shown in FIG. 9B . The description of the conditional handover (CHO) shown in FIG. 9A is the same as that of the description of the conditional handover (CHO) shown in FIG. Figure 5 The description of the conditional switching (CHO) shown in 11A is the same as that of the switching (HO) shown in 9B. Figure 5 The description of the handover (HO) shown in FIG. 11B is the same.

[0196] like Figure 6 As shown in the figure, the migration process also includes the following operations:

[0197] 10. When the result of evaluating the handover condition in 16a of operation 9A is that the handover condition is satisfied, or when operation 9B is completed, in operation 10, IAB-node 3 detaches from the Source IAB donor, applies the configuration in the first configuration information, and performs a random access procedure (detach from source, apply the stored configuration, RACH) to the target / new parent node;

[0198] 11. IAB-node 3 sends first configuration information configuration completion information to the new parent node IAB-node 2. The first configuration information configuration completion information may be, for example, RRC reconfiguration complete;

[0199] 12. IAB-node 2 sends an uplink radio resource control message transfer message (UL RRC Message Transfer) to Target IAB-donor;

[0200] 13. IAB-node 3 may send indication information to a wireless device (eg, UE1, UE2 or IAB-node 4) at one of a plurality of occasions, for example, Figure 6 The timing of operation 13 shown is when IAB-node 3 sends a reconfiguration completion based on the first reconfiguration message (ie, Figure 6 Operation 11), wherein the indication information enables or prohibits the wireless device from applying the configuration in the second reconfiguration message, or the indication information indicates information of the Target IAB donor; and Figure 6 In the embodiment shown in FIG. 1 , IAB-node 3 further sends second configuration information (RRC Reconfiguration) in operation 13, corresponding to Figure 4 Operation 306, that is, Figure 6 Operation 13 corresponds to Figure 4Operation 306 and operation 302 are combined into one operation; in addition, the present application may not be limited thereto, for example, the second configuration information or the indication information may be sent at other times, or the indication information and the second configuration information may not be sent at the same time;

[0201] 14. Upon receiving the indication information, the wireless device (eg, UE1, UE2 or IAB-node 4) applies the configuration in the second configuration information, and sends second configuration information configuration completion information, eg, RRC reconfiguration complete, to IAB-node 3 after the configuration is applied.

[0202] In addition, for Figure 6 Instructions and solutions for operations 3a, 4a, and 5a Figure 5 The instructions for operations 3a, 4a, and 5a are the same.

[0203] According to an embodiment of the first aspect of the present application, a wireless device UE or IAB-node (e.g., UE1, UE2, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node3) can also apply configurations from a new IAB-donor, such as security key-related configurations, so as to communicate correctly with the new IAB-donor, and the complexity of the solution is low and has little impact on current standards; in addition, for the scenario of intra-CU migration, the method of the embodiment of the first aspect of the present application can also be used to process it, so that the wireless device UE or IAB-node (e.g., UE1, UE2, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node 3) can apply the new configuration in a timely manner.

[0204] Embodiments of the second aspect

[0205] At least for the same problem as the embodiment of the first aspect, the embodiment of the second aspect of the present application provides a method for receiving a signal, which corresponds to the method of the embodiment of the first aspect.

[0206] Below, Figure 2 Take the inter-CU migration scenario as an example. Figure 2 The signal receiving method of the embodiment of the second aspect of the present application is described on the wireless device side. It should be noted that the signal receiving method of the embodiment of the second aspect of the present application is not limited to the inter-CU migration scenario, and the method is also applicable to the intra-CU migration scenario. The interaction process between the wireless device and the IAB-node 3 can be referred to Figure 5 or Figure 6The wireless device includes: a terminal device, for example, UE1, UE2; or, an access and backhaul node integrated at the next level of IAB-node 3, IAB-node 4.

[0207] Figure 7 is a schematic diagram of a signal receiving method in an embodiment of the second aspect, such as Figure 7 As shown, the method includes:

[0208] Operation 701, the wireless device receives a second reconfiguration message; and

[0209] Operation 702: The wireless device receives indication information, where the indication information is used to instruct the wireless device to apply the configuration in the received second reconfiguration message at a radio resource control (RRC) layer.

[0210] It is worth noting that the above Figure 7 The embodiments of the present application are only schematically described, but the present application is not limited thereto. For example, the execution order of the various operations can be appropriately adjusted, and other operations can be added or some operations can be reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the above appended Figure 7 Records of.

[0211] The wireless device receives the indication information sent by IAB-node 3 at one of the following times:

[0212] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0213] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0214] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0215] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0216] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected; when IAB-node 3 initiates a random access process to the new parent node or the target parent node (target parent IAB-node), wherein the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention, for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSG A), etc.;

[0217] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0218] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0219] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0220] In the present application, the wireless device can receive the indication information through a backhaul adaptation protocol data unit (BAP PDU), a radio link layer control protocol data unit (RLC PDU), a media access control control element (MAC CE), a media access control subheader (MAC subheader) or a physical layer signaling.

[0221] In at least some embodiments, the indication information enables or prohibits the wireless device: applying the configuration in the second reconfiguration message at the radio resource control (RRC) layer, or initiating the execution of conditional reconfiguration, or performing migration, or changing the CU, etc. Among them, in the second reconfiguration message, the target candidate cell with the same identifier as the cell of the IAB-node 3 serving UE or downlink IAB-node (that is, the current serving cell of the wireless device UE1, UE2, UE3 or IAB-node 4) is configured once or appears once. For example, the identifier can be a PCI or a cell identifier (cell ID) or a global cell identity (CGI) or a cell global identifier (ECGI), etc. The wireless device applies the configuration of the target candidate cell with the same identifier as the current serving cell in the second reconfiguration message at the radio resource control (RRC) layer.

[0222] In addition, the present application may not be limited to this. In at least some embodiments, in the second reconfiguration message (for example, in ServingCellConfigCommon included in reconfigurationWithSync), the target candidate cell with the same identifier as the cell of the UE served by IAB-node 3 or the downlink IAB-node (that is, the service cell currently serving the wireless device UE1, UE2 or IAB-node 4) is configured more than twice (that is, appears more than twice) or is not configured (that is, does not appear).

[0223] In at least some other embodiments, the indication information indicates information of a centralized unit (CU), wherein the centralized unit refers to a centralized unit to which the IAB-node 3 is to be connected or has been connected based on the first reconfiguration message, for example, Figure 2 TargetIAB donor in.

[0224] The information of the centralized unit includes at least one of the following information: an identifier of the centralized unit; an index of the centralized unit; at least a part of the Internet Protocol (IP) address and / or the network equipment identifier (gNB Identifier (gNBID)) of the centralized unit (for example, the most significant bit MSB or the least significant bit LSB); a cell identity (Cellidentity) of the centralized unit or at least a part of the cell identity (for example, the most significant bits MSBs of the Cell identity); at least a part of the public land mobile network identification information (PLMN-IdentityInfo) of the centralized unit; and at least a part of the common gateway interface (CGI).

[0225] In at least some other embodiments, the second reconfiguration message includes information of the centralized unit and a configuration corresponding to the information of the centralized unit. The wireless device determines the configuration corresponding to the information of the centralized unit in the second reconfiguration message based on the information of the centralized unit in the indication information, and applies the configuration at a radio resource control (RRC) layer of the wireless device.

[0226] In at least some further embodiments, the indication information may indicate a configuration applied by the wireless device (eg, condRRCReconfig).

[0227] Among them, the configuration identification information in the second reconfiguration message (conditional RRC reconfiguration) has a corresponding relationship with the identification information of the target cell in the first reconfiguration message (for example, PCI); or, the configuration identification information in the second reconfiguration message (conditional RRC reconfiguration) has a corresponding relationship with the configuration identification information in the first reconfiguration message; or, the target cell has a corresponding relationship with the configuration identification information (CondReconfigId) or configuration (condRRCReconfig) included in the second configuration message (conditionalRRC reconfiguration).

[0228] In operation 701, in some embodiments, the wireless device receives the second reconfiguration message from SourceIAB-donor forwarded by IAB-node 3.

[0229] In operation 701, in some other embodiments, IAB-node 3 receives and stores the second reconfiguration message from Source IAB-donor, and sends the stored second reconfiguration message to the wireless device at an appropriate time.

[0230] The timing at which the wireless device receives the second reconfiguration message sent by the IAB-node 3 is one of the following timings:

[0231] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0232] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0233] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0234] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0235] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0236] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0237] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0238] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0239] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0240] In some embodiments, the wireless device receives the second reconfiguration message and the indication information from IAB-node 3 simultaneously; in addition, the wireless device may not receive the second reconfiguration message and the indication information simultaneously.

[0241] According to an embodiment of the second aspect of the present application, a wireless device (e.g., UE1, UE2, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node3) can promptly apply the configuration in the second reconfiguration message at the RRC layer, such as a security key-related configuration, so as to communicate correctly with the new IAB-donor, and the complexity of the scheme is low and has little impact on current standards; in addition, for the scenario of intra-CU migration, the method of the embodiment of the second aspect of the present application is also applicable, so that the wireless device (e.g., UE1, UE2, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node 3) can promptly apply the new configuration.

[0242] Embodiments of the third aspect

[0243] At least for the same problem as the embodiment of the first aspect, the embodiment of the third aspect of the present application provides a method for sending a signal, which corresponds to the method of the embodiment of the first aspect.

[0244] Below, Figure 2 Take the inter-CU migration scenario as an example. Figure 2 The signal sending method of the embodiment of the third aspect of the present application is described on the source centralized unit (SourceIAB-donor) side. It should be pointed out that the signal sending method of the embodiment of the third aspect of the present application is not limited to the inter-CU migration scenario, and the method is also applicable to the intra-CU migration scenario. The interaction process between Source IAB-donor and IAB-node 3 can be referred to Figure 5 or Figure 6 .

[0245] Figure 8 is a schematic diagram of a signal sending method in an embodiment of the third aspect, such as Figure 8 As shown, the method includes:

[0246] Operation 801: The source centralized unit sends a first reconfiguration message to the integrated access and backhaul node; and

[0247] Operation 802: The source centralized unit sends a second reconfiguration message to the wireless device, wherein in the second reconfiguration message, a target candidate cell having the same identifier as the current serving cell of the integrated access and backhaul node is configured once.

[0248] Fig. 9 is another schematic diagram of the signal sending method in the embodiment of the third aspect, such as Fig. 9 As shown, the method includes:

[0249] Operation 901: The source centralized unit sends a first reconfiguration message to the integrated access and backhaul node; and

[0250] Operation 902: The source centralized unit sends a second reconfiguration message to the wireless device, where the second reconfiguration message includes information of the target centralized unit and the configuration corresponding to the information of the target centralized unit.

[0251] Fig.10 is another schematic diagram of the signal sending method in the embodiment of the third aspect, such as Fig.10 As shown, the method includes:

[0252] Operation 1001: A source centralized unit sends a first reconfiguration message to an integrated access and backhaul node;

[0253] Operation 1002: The source centralized unit sends a second reconfiguration message to the wireless device; and

[0254] Operation 1003: Send corresponding relationship indication information to the integrated access and backhaul node.

[0255] Among them, the correspondence indication information in operation 1003 is used to indicate: the correspondence between the identification information of the configuration in the second reconfiguration message (conditional RRC reconfiguration) and the identification information of the target cell in the first reconfiguration message (for example, PCI); the correspondence between the identification information of the configuration in the second reconfiguration message (conditional RRCreconfiguration) and the identification information of the configuration in the first reconfiguration message; the correspondence between the target cell and the identification information (CondReconfigId) of the configuration included in the second configuration message (conditional RRC reconfiguration) or the configuration (condRRCReconfig).

[0256] exist Figure 8 , Fig. 9 and Fig.10 In: An integrated access and backhaul node is for example Figure 2 IAB-node 3 of the wireless device is, for example, Figure 2 UE1, UE2 or IAB-node 4; the target centralized unit refers to the centralized unit to which IAB-node 3 is to be connected or has been connected based on the first reconfiguration message, for example, Figure 2 Target IAB-donor).

[0257] According to an embodiment of the third aspect of the present application, a wireless device (e.g., UE1, UE2, UE3, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node3) can promptly apply the configuration in the second reconfiguration message at the RRC layer, such as a security key-related configuration, so as to communicate correctly with the new IAB-donor, and the complexity of the scheme is low and has little impact on current standards; in addition, for the scenario of intra-CU migration, the method of the embodiment of the third aspect of the present application is also applicable, so that the wireless device (e.g., UE1, UE2, or IAB-node 4) under a migrated or prepared IAB-node (e.g., IAB-node3) can promptly apply the new configuration.

[0258] Embodiments of the fourth aspect

[0259] The embodiment of the present application provides a signal receiving and sending device. The device may be, for example, an integrated access and backhaul node, or may be one or more components or assemblies configured in the integrated access and backhaul node. The integrated access and backhaul node may be, for example, Figure 2 IAB-node 3. The device corresponds to the embodiment of the first aspect.

[0260] Fig.11 is a schematic diagram of a signal receiving and sending device according to an embodiment of the present application, such as Fig.11 As shown, the signal receiving and sending device 1100 includes:

[0261] A first receiving unit 1101, which receives a first reconfiguration message; and

[0262] The first sending unit 1102 is configured to send indication information to the wireless device, where the indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message.

[0263] The wireless device includes: a terminal device, for example, Figure 2or, the next level integrated access and backhaul node IAB-node 4 of the integrated access and backhaul node.

[0264] In at least one embodiment, the first sending unit 1102 sends the indication information to the wireless device at one of the following times:

[0265] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0266] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0267] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0268] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0269] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0270] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0271] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0272] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0273] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0274] In some embodiments, the indication information enables or prohibits the wireless device from: applying the configuration in the second reconfiguration message, or performing migration, or changing the CU, etc. Among them, the target candidate cell with the same identifier as the cell of the UE or downlink IAB-node served by IAB-node 3 (that is, the serving cell of the wireless device UE1, UE2, UE3 or IAB-node 4 at present) is configured once or appears once. For example, the identifier can be a PCI or a cell identifier (cell ID) or a global cell identity (CGI) or a cell global identifier (ECGI), etc. Thus, the indication information enables the wireless device to apply the configuration of the target candidate cell with the same identifier as the current serving cell in the second reconfiguration message.

[0275] In addition, the present application may not be limited to this. In at least some embodiments, in the second reconfiguration message (for example, in ServingCellConfigCommon included in reconfigurationWithSync), the target candidate cell with the same identifier as the cell of the UE served by IAB-node 3 or the downlink IAB-node (that is, the service cell currently serving the wireless device UE1, UE2 or IAB-node 4) is configured more than twice (that is, appears more than twice) or is not configured (that is, does not appear).

[0276] In some other embodiments, the indication information indicates information of a centralized unit, wherein the centralized unit refers to a centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message, for example, Figure 2 TargetIAB-node.

[0277] The second reconfiguration message includes information of the centralized unit and configuration corresponding to the information of the centralized unit.

[0278] In still other embodiments, the indication information may indicate a configuration of the wireless device application.

[0279] exist Fig.11 As shown, the signal receiving and sending device 1100 may also include:

[0280] The second receiving unit 1103 receives corresponding relationship indication information.

[0281] Among them, the correspondence indication information is used to indicate: the correspondence between the configuration identification information in the second reconfiguration message and the identification information of the target cell in the first reconfiguration message; or, the correspondence between the configuration identification information in the second reconfiguration message and the configuration identification information in the first reconfiguration message; or, the correspondence between the target cell and the configuration identification information or configuration included in the second reconfiguration message.

[0282] exist Fig.11 In the embodiment, the signal receiving and sending device 1100 further includes:

[0283] The second sending unit 1104 is configured to forward a second reconfiguration message to the wireless device.

[0284] exist Fig.11 In the embodiment, the signal receiving and sending device 1100 further includes:

[0285] A storage unit 1105, which stores a second reconfiguration message; and

[0286] The third sending unit 1106 is configured to send a second reconfiguration message to the integrated access and backhaul node to the wireless device.

[0287] The timing at which the third sending unit 1106 sends the second reconfiguration message to the wireless device is one of the following timings:

[0288] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0289] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0290] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0291] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0292] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0293] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0294] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0295] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0296] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0297] In the present application, the signal receiving and sending apparatus 1100 may use the second sending unit 1104 to forward the second reconfiguration message, or use the storage unit 1105 and the third sending unit 1106 to store and send the second reconfiguration message.

[0298] In the case where the storage unit 1105 and the third sending unit 1106 are used to store and send the second reconfiguration message, in some embodiments, the apparatus 1100 for receiving and sending a signal simultaneously sends the second reconfiguration message and the indication information to the wireless device, for example, the third sending unit 1106 and the first sending unit 1102 simultaneously send the second reconfiguration message and the indication information, or the second reconfiguration message and the indication information are combined into one message, which is sent by the third sending unit 1106 or the first sending unit 1102. In addition, the apparatus 1100 for receiving and sending a signal may not send the second reconfiguration message and the indication information simultaneously.

[0299] In addition, for the sake of simplicity, the signal receiving and sending device 1100 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned various components or modules can be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of this application is not limited to this.

[0300] The above embodiments are merely exemplary of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0301] Embodiments of the fifth aspect

[0302] The embodiment of the present application provides a signal receiving device. The device may be, for example, a wireless device, or may be one or more components or assemblies configured in the wireless device. The wireless device may be, for example, Figure 2 UE1, UE2, or IAB-node 4. The receiving device of the signal corresponds to the embodiment of the second aspect.

[0303] Fig.12is a schematic diagram of a signal receiving device according to an embodiment of the present application, such as Fig.12 As shown, the signal receiving device 1200 includes:

[0304] A receiving unit 1201, which receives a second reconfiguration message; and

[0305] The third receiving unit 1202 is configured to receive indication information, where the indication information is used to instruct the wireless device to apply the configuration in the received second reconfiguration message at a radio resource control layer.

[0306] The third receiving unit 1202 receives an integrated access and backhaul node (eg, Figure 2 The timing of sending the indication information by the IAB-node 3) is one of the following timings:

[0307] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional handover or conditional reconfiguration (Conditional handover / reconfiguration), when the IAB-node 3 determines that a related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold, and the quality of the neighboring cell is higher than another threshold);

[0308] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0309] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0310] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0311] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0312] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0313] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0314] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0315] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message. The third receiving unit 1202 receives the indication information by returning an adaptation protocol data unit, a radio link layer control protocol data unit, a media access control control information element, a media access control subheader, or a physical layer signaling.

[0316] In some embodiments, the indication information enables or prohibits the wireless device: applying the configuration in the second reconfiguration message at the radio resource control layer. Wherein, in the second reconfiguration message, the target candidate cell with the same identifier as the cell of the IAB-node 3 serving UE or downlink IAB-node (i.e., the current serving cell of the wireless device UE1, UE2, UE3 or IAB-node 4) is configured once or appears once. For example, the identifier can be a PCI or a cell identifier (cell ID) or a global cell identity (CGI) or a cell global identifier (ECGI), etc. The wireless device applies the configuration of the target candidate cell with the same identifier as the current serving cell in the second reconfiguration message at the radio resource control layer.

[0317] In addition, the present application may not be limited to this. In at least some embodiments, in the second reconfiguration message (for example, in ServingCellConfigCommon included in reconfigurationWithSync), the target candidate cell with the same identifier as the cell of the UE served by IAB-node 3 or the downlink IAB-node (that is, the service cell currently serving the wireless device UE1, UE2 or IAB-node 4) is configured more than twice (that is, appears more than twice) or is not configured (that is, does not appear).

[0318] In some other embodiments, the indication information indicates information of a centralized unit, where the centralized unit refers to a centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message, for example, Figure 2 The second reconfiguration message includes the information of the centralized unit and the configuration corresponding to the information of the centralized unit. The wireless device determines the configuration corresponding to the information of the centralized unit in the second reconfiguration message according to the information of the centralized unit in the indication information, and applies the configuration at the radio resource control layer.

[0319] In yet other embodiments, the indication information indicates the configuration applied by the wireless device.

[0320] For example, the identification information of the configuration in the second reconfiguration message corresponds to the identification information of the target cell in the first reconfiguration message; or, the identification information of the configuration in the second reconfiguration message corresponds to the identification information of the configuration in the first reconfiguration message; or, the target cell corresponds to the identification information of the configuration or the configuration included in the second reconfiguration message.

[0321] In the present application, the timing at which the receiving unit 1201 receives the second reconfiguration message sent by the integrated access and backhaul node is one of the following timings:

[0322] Migrate or reconfigure or change the CU by conditional handover or reconfiguration in IAB-node 3

[0323] In the case of the conditional reconfiguration, when the IAB-node 3 determines that the related measurement event of the conditional reconfiguration is satisfied, for example, the measurement event may be an A3 event (the quality of the neighboring cell is better than the quality of the serving cell by an offset value) or an A5 event (the quality of the serving cell is lower than a threshold and the quality of the neighboring cell is higher than another threshold);

[0324] In the case where the IAB-node 3 migrates or reconfigures or changes the CU in a conditional switch or conditional reconfiguration manner, when the IAB-node 3 initiates the execution of the conditional switch or conditional reconfiguration;

[0325] When IAB-node 3 receives the first reconfiguration message, for example, an RRC reconfiguration message;

[0326] When IAB-node 3 detaches from a source IAB-donor or source parent IAB-node, the source IAB-donor is, for example, Figure 2 Source IAB-donar, the source parent node is Figure 2 IAB-node 1;

[0327] When IAB-node 3 is synchronized with the new parent node or the target parent node (target parent IAB-node) in downlink, for example, the SSB of the cell under the new parent node or the target parent node is detected;

[0328] When IAB-node 3 initiates a random access process to a new parent node or a target parent node (target parent IAB-node), the new parent node or the target parent node is, for example, Figure 2 IAB-node 2 of the present invention; for example, initiating a random access process may be initializing a random access process or selecting a random access resource or sending a random access preamble or sending a message A (MSGA), etc.;

[0329] When IAB-node 3 sends a reconfiguration completion (eg, RRC reconfiguration complete) message based on the first reconfiguration message to a new parent node or a target parent node (parent IAB-node);

[0330] When the random access procedure of IAB-node 3 is successful, for example, the random access procedure of IAB-node 3 to the new parent node or the target parent node (parent IAB-node) is successful, for example, a random access response is received or contention resolution is successful or message B (MSG B) is received, etc.;

[0331] When IAB-node 3 receives a confirmation message or feedback message for a reconfiguration completion (e.g., RRC reconfiguration complete) message from its new parent node (parent IAB-node), wherein the confirmation message is, for example, a radio link control (RLC) layer confirmation message, and the feedback message is, for example, a hybrid automatic repeat request (HARQ) feedback message.

[0332] The receiving device 1200 of the signal receives the second reconfiguration message and the indication information from the integrated access and backhaul node at the same time. For example, the timing when the receiving unit 1201 receives the second reconfiguration message is the same as the timing when the third receiving unit 1202 receives the indication information, or the second reconfiguration message and the indication information are combined into one message and sent, and the message is received by the receiving unit 1201 or the third receiving unit 1202. In addition, the receiving device 1200 of the signal may not receive the second reconfiguration message and the indication information at the same time.

[0333] In addition, for the sake of simplicity, the signal receiving device 1200 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned various components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0334] The above embodiments are merely exemplary of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0335] Embodiments of the sixth aspect

[0336] The embodiment of the present application provides a signal sending device. The device may be, for example, a source concentration unit, or may be one or more components or assemblies configured in the source concentration unit. The source concentration unit may be, for example, Figure 2 Source IABdonor. The signal sending device corresponds to the embodiment of the third aspect.

[0337] Fig.13 is a schematic diagram of a signal sending device according to an embodiment of the present application, such as Fig.13 As shown, the signal sending device 1300 includes:

[0338] A fourth sending unit 1301, which sends a first reconfiguration message to the integrated access and backhaul node; and

[0339] The fifth sending unit 1302 is configured to send a second reconfiguration message to the wireless device.

[0340] In the second reconfiguration message, a target candidate cell having the same identifier as a current serving cell of the integrated access and backhaul node is configured once.

[0341] Fig.14 is another schematic diagram of a signal sending device according to an embodiment of the present application, such as Fig.14 As shown, the signal sending device 1400 includes:

[0342] A sixth sending unit 1401, which sends a first reconfiguration message to the integrated access and backhaul node; and

[0343] The seventh sending unit 1402 sends a second reconfiguration message to the wireless device, wherein the second reconfiguration message includes information of a target centralized unit and the configuration corresponding to the information of the target centralized unit, wherein the target centralized unit refers to a centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message.

[0344] Fig.15 is another schematic diagram of a signal sending device according to an embodiment of the present application, such as Fig.15 As shown, the signal sending device 1500 includes:

[0345] An eighth sending unit 1501, which sends a first reconfiguration message to the integrated access and backhaul node;

[0346] A ninth sending unit 1502, which sends a second reconfiguration message to the wireless device; and

[0347] The tenth sending unit 1503, which sends a corresponding relationship indication information to the integrated access and backhaul node.

[0348] The corresponding relationship indication information is used to indicate:

[0349] The correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the target cell in the first reconfiguration message; or, the correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the configuration in the first reconfiguration message; or, the correspondence between the target cell and the identification information of the configuration or the configuration included in the second reconfiguration message.

[0350] exist Fig.13 , Fig.14 and Fig.15 In: An integrated access and backhaul node is for example Figure 2 IAB-node 3 of the wireless device is, for example, Figure 2UE1, UE2 or IAB-node 4; the target centralized unit refers to the centralized unit to which IAB-node 3 is to be connected or has been connected based on the first reconfiguration message, for example, Figure 2 Target IAB-donor).

[0351] In addition, for the sake of simplicity, the signal sending device 1300, 1400 or 1500 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned various components or modules can be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of this application is not limited to this.

[0352] The above embodiments are merely exemplary of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0353] Embodiment of the seventh aspect

[0354] The present application also provides a communication system. Figure 1 , the contents that are the same as those in the embodiments of the first to sixth aspects will not be repeated.

[0355] In some embodiments, the communication system may include:

[0356] A source concentration unit, comprising the signal sending device 1300, 1400 or 1500 as described in the embodiment of the sixth aspect;

[0357] A wireless device, comprising the signal receiving device 1200 according to the embodiment of the fifth aspect; and

[0358] An integrated access and backhaul node, comprising a signal receiving and sending device 1100 as described in the embodiment of the fourth aspect.

[0359] The embodiment of the present application also provides an integrated access and backhaul node, but the present application is not limited thereto and may also be other devices.

[0360] Fig.16 FIG. 1 is a schematic diagram of the structure of an integrated access and backhaul node IAB-node according to an embodiment of the present application. Fig.16As shown, IAB-node 1600 may include: a processor 1610 (e.g., a central processing unit CPU) and a memory 1620; the memory 1620 is coupled to the processor 1610. The memory 1620 may store various data; in addition, it may store an information processing program 1630, and execute the program 1630 under the control of the processor 1610. IAB-node 1600 may be a source centralized unit (e.g., Figure 2 source IAB-donor in the wireless device), the next level IAB-node in the wireless device, or Figure 2 IAB-node 3 in.

[0361] For example, the processor 1610 may be configured to execute a program to implement the method described in the embodiments of the first aspect, the second aspect, or the third aspect.

[0362] In addition, if Fig.16 As shown, the network device 1600 may also include: a transceiver 1640 and an antenna 1650, etc.; wherein the functions of the above components are similar to those of the prior art and are not described in detail here. It is worth noting that the network device 1600 does not necessarily have to include Fig.16 In addition, the network device 1600 may also include Fig.16 For components not shown, reference may be made to the prior art.

[0363] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0364] Fig.17 Schematic diagram of a terminal device in an embodiment of the present application. Fig.17 As shown, the terminal device 1700 may include a processor 1710 and a memory 1720; the memory 1720 stores data and programs and is coupled to the processor 1710. It is worth noting that the figure is exemplary; other types of structures may also be used to supplement or replace the structure to implement telecommunication functions or other functions. The terminal device 1700 may be at least one of UE1, UE2, and UE3 in the wireless device.

[0365] For example, the processor 1710 may be configured to execute a program to implement the method as described in the embodiment of the second aspect.

[0366] like Fig.17 As shown, the terminal device 1700 may also include: a communication module 1730, an input unit 1740, a display 1750, and a power supply 1760. The functions of the above components are similar to those of the prior art and are not described here. It is worth noting that the terminal device 1700 does not necessarily include Fig.17All components shown in the figure are not necessary; in addition, the terminal device 1700 may also include Fig.17 For components not shown, reference may be made to the prior art.

[0367] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the signal receiving method described in the embodiment of the second aspect.

[0368] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the signal receiving method described in the embodiment of the second aspect.

[0369] An embodiment of the present application further provides a computer program, wherein when the program is executed in an IAB-node, the program causes the IAB-node to execute the method described in the embodiment of the first or third aspect.

[0370] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables the IAB-node to execute the method described in the embodiment of the first or third aspect.

[0371] The above devices and methods of the present application can be implemented by hardware, or by hardware combined with software. The present application relates to such a computer-readable program, which, when executed by a logic component, enables the logic component to implement the above-mentioned devices or components, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0372] The method / device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of the functional block diagrams may correspond to various software modules of the computer program flow or to various hardware modules. These software modules may correspond to the various steps shown in the figure, respectively. These hardware modules may be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0373] The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in a memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0374] For one or more of the functional blocks described in the drawings and / or one or more combinations of functional blocks, it can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof for performing the functions described in the present application. For one or more of the functional blocks described in the drawings and / or one or more combinations of functional blocks, it can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0375] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0376] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0377] IAB-node side method:

[0378] 1. A method for receiving and sending a signal, comprising:

[0379] The integrated access and backhaul node receives a first reconfiguration message; and

[0380] The integrated access and backhaul node sends indication information to the wireless device, where the indication information is used to instruct the wireless device to apply the configuration in the second reconfiguration message.

[0381] 2. The method as described in Note 1, wherein:

[0382] The timing at which the integrated access and backhaul node sends the indication information to the wireless device is one of the following timings:

[0383] When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied;

[0384] When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration;

[0385] When the integrated access and backhaul node receives the first reconfiguration message;

[0386] When the integrated access and backhaul node detaches from the source centralized unit or parent node;

[0387] When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink;

[0388] When the integrated access and backhaul node initiates a random access process to a new parent node or a target parent node;

[0389] When the integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to a new parent node or a target parent node;

[0390] When the integrated access and backhaul node random access process is successful;

[0391] When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

[0392] 3. The method according to any one of Supplements 1 to 2, wherein

[0393] The indication information enables or disables the wireless device:

[0394] Apply the configuration in the second reconfiguration message.

[0395] 4. The method as described in Note 3, wherein:

[0396] In the second reconfiguration message, a target candidate cell having the same identifier as the current serving cell of the integrated access and backhaul node is configured once.

[0397] 5. The method as described in Note 3, wherein:

[0398] The indication information enables the wireless device to apply the configuration of the target candidate cell having the same identifier as the current serving cell in the second reconfiguration message.

[0399] 6. The method according to any one of Supplements 1 to 2, wherein

[0400] The indication information indicates information of the centralized unit,

[0401] The centralized unit refers to the centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message.

[0402] 7. The method as described in Note 6, wherein:

[0403] The second reconfiguration message includes the information of the centralized unit and the configuration corresponding to the information of the centralized unit.

[0404] 8. The method as described in any one of Notes 1 to 2, wherein:

[0405] The indication information indicates the configuration applied by the wireless device.

[0406] 9. The method as described in Supplementary Note 8, wherein the method further comprises:

[0407] receiving corresponding relationship indication information,

[0408] The corresponding relationship indication information is used to indicate:

[0409] a correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the target cell in the first reconfiguration message;

[0410] a correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the configuration in the first reconfiguration message;

[0411] The target cell and the identification information of the configuration included in the second reconfiguration message or the corresponding relationship between the configuration.

[0412] 10. The method according to any one of Supplements 1 to 9, wherein

[0413] The integrated access and backhaul node sends the indication information to the wireless device via a backhaul adaptation protocol data unit, a radio link layer control protocol data unit, a media access control control information element, a media access control subheader or a physical layer signaling.

[0414] 11. The method according to any one of Notes 1 to 9, wherein the method further comprises:

[0415] The integrated access and backhaul node also forwards the second reconfiguration message to the wireless device.

[0416] 12. The method according to any one of Notes 1 to 9, wherein the method further comprises:

[0417] The integrated access and backhaul node stores the second reconfiguration message; and

[0418] The integrated access and backhaul node sends the second reconfiguration message to the wireless device.

[0419] 13. The method as described in Note 12, wherein:

[0420] The timing at which the integrated access and backhaul node sends the second reconfiguration message to the wireless device is one of the following timings:

[0421] When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied;

[0422] When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration;

[0423] When the integrated access and backhaul node receives the first reconfiguration message;

[0424] When the integrated access and backhaul node detaches from the source centralized unit or parent node;

[0425] When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink;

[0426] When the integrated access and backhaul node initiates a random access process to a new parent node or a target parent node;

[0427] When the integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to a new parent node or a target parent node;

[0428] When the integrated access and backhaul node random access process is successful;

[0429] When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

[0430] 14. The method as described in Note 13, wherein:

[0431] The integrated access and backhaul node sends the second reconfiguration message and the indication information to the wireless device simultaneously.

[0432] 15. The method according to any one of Supplements 1 to 14, wherein

[0433] The wireless device is:

[0434] terminal equipment; or

[0435] The next level integrated access and backhaul node of the integrated access and backhaul node.

[0436] Methods on the UE and descendant IAB-node side:

[0437] 1. A method for receiving a signal, comprising:

[0438] The wireless device receives a second reconfiguration message; and

[0439] The wireless device receives the indication information,

[0440] The indication information is used by the wireless device to apply the configuration in the second reconfiguration message received at the radio resource control layer.

[0441] 2. The method as described in Note 1, wherein:

[0442] The timing at which the wireless device receives the indication information sent by the integrated access and backhaul node is one of the following timings:

[0443] When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied;

[0444] When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration;

[0445] When the integrated access and backhaul node receives a first reconfiguration message;

[0446] When the integrated access and backhaul node detaches from the source centralized unit or parent node;

[0447] When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink;

[0448] When the integrated access and backhaul node initiates a random access process to a new parent node or a target parent node;

[0449] When the integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to a new parent node or a target parent node;

[0450] When the integrated access and backhaul node random access process is successful;

[0451] When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

[0452] 3. The method according to any one of Supplements 1 to 2, wherein

[0453] The indication information enables or disables the wireless device:

[0454] The configuration in the second reconfiguration message is applied at the radio resource control layer.

[0455] 4. The method as described in Note 3, wherein:

[0456] In the second reconfiguration message, a target candidate cell having the same identifier as the current serving cell of the integrated access and backhaul node is configured once.

[0457] 5. The method as described in Note 4, wherein:

[0458] The wireless device applies the configuration of the target candidate cell having the same identifier as the current serving cell in the second reconfiguration message at the radio resource control layer.

[0459] 6. The method according to any one of Supplements 1 to 2, wherein

[0460] The indication information indicates information of the centralized unit,

[0461] The centralized unit refers to the centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message.

[0462] 7. The method as described in Note 6, wherein:

[0463] The second reconfiguration message includes the information of the centralized unit and the configuration corresponding to the information of the centralized unit,

[0464] The wireless device determines the configuration corresponding to the information of the centralized unit in the second reconfiguration message according to the information of the centralized unit in the indication information, and applies the configuration at the radio resource control layer.

[0465] 8. The method as described in any one of Notes 1 to 2, wherein:

[0466] The indication information indicates the configuration applied by the wireless device.

[0467] 9. The method as described in Note 7, wherein:

[0468] The configured identification information in the second reconfiguration message has a corresponding relationship with the identification information of the target cell in the first reconfiguration message;

[0469] The configuration identification information in the second reconfiguration message has a corresponding relationship with the configuration identification information in the first reconfiguration message;

[0470] The target cell has a corresponding relationship with the identification information of the configuration or the configuration included in the second reconfiguration message.

[0471] 10. The method according to any one of Supplements 1 to 9, wherein

[0472] The wireless device receives the indication information by returning an adaptive protocol data unit, a radio link layer control protocol data unit, a media access control control information element, a media access control subheader or a physical layer signaling.

[0473] 11. The method as described in Note 1, wherein:

[0474] The timing at which the wireless device receives the second reconfiguration message sent by the integrated access and backhaul node is one of the following timings:

[0475] When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied;

[0476] When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration;

[0477] When the integrated access and backhaul node receives a first reconfiguration message;

[0478] When the integrated access and backhaul node detaches from the source centralized unit or parent node;

[0479] When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink;

[0480] When the integrated access and backhaul node initiates a random access channel to a new parent node or a target parent node;

[0481] When the integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to a new parent node or a target parent node;

[0482] When the integrated access and backhaul node random access process is successful;

[0483] When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

[0484] 12. The method as described in Note 11, wherein:

[0485] The wireless device simultaneously receives the second reconfiguration message and the indication information from the integrated access and backhaul node.

[0486] 13. The method according to any one of Supplements 1 to 12, wherein

[0487] The wireless device is:

[0488] terminal equipment; or

[0489] The next level integrated access and backhaul node of the integrated access and backhaul node.

[0490] Source donor side method:

[0491] 1. A method for sending a signal, comprising:

[0492] The source concentration unit sends a first reconfiguration message to the integrated access and backhaul node; and

[0493] The source centralized unit sends a second reconfiguration message to the wireless device,

[0494] In the second reconfiguration message, a target candidate cell having the same identifier as a current serving cell of the integrated access and backhaul node is configured once.

[0495] 2. A method for sending a signal, comprising:

[0496] The source concentration unit sends a first reconfiguration message to the integrated access and backhaul node; and

[0497] The source centralized unit sends a second reconfiguration message to the wireless device,

[0498] The second reconfiguration message includes information of the target centralized unit and the configuration corresponding to the information of the target centralized unit.

[0499] The target centralized unit refers to a centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message.

[0500] 3. A method for sending a signal, comprising:

[0501] The source concentration unit sends a first reconfiguration message to the integrated access and backhaul node;

[0502] The source central unit sends a second reconfiguration message to the wireless device; and

[0503] Sending corresponding relationship indication information to the integrated access and backhaul nodes,

[0504] The corresponding relationship indication information is used to indicate:

[0505] a correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the target cell in the first reconfiguration message;

[0506] a correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the configuration in the first reconfiguration message;

[0507] The target cell and the identification information of the configuration included in the second reconfiguration message or the corresponding relationship between the configuration.

[0508] 4. The method according to any one of Supplements 1 to 3, wherein

[0509] The wireless device is:

[0510] terminal equipment; or

[0511] The next level integrated access and backhaul node of the integrated access and backhaul node.

Claims

1. A signal receiving and sending device, arranged in an integrated access and backhaul node, the signal receiving and sending device comprising: A first receiving unit, configured to receive a first reconfiguration message; as well as A first sending unit is configured to send indication information to a wireless device, wherein the indication information is used to instruct the wireless device to apply a configuration in a second reconfiguration message; The first receiving unit receives the first reconfiguration message in the following circumstances: After the target centralized unit of the integrated access and backhaul node receives the handover request sent by the source centralized unit of the integrated access and backhaul node, the target centralized unit sends a request to the target parent node of the integrated access and backhaul node, and the target parent node sends a response to the request; After the target centralized unit receives the response sent by the target parent node, sending a handover request confirmation to the source centralized unit of the integrated access and backhaul node; After receiving the switching request confirmation, the source centralized unit sends a terminal device context modification request to the source parent node of the integrated access and backhaul node, and the source parent node sends the first reconfiguration message to the integrated access and backhaul node.

2. The device according to claim 1, wherein: The timing at which the first sending unit sends the indication information to the wireless device is one of the following timings: When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied; When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration; When the integrated access and backhaul node receives the first reconfiguration message; When the integrated access and backhaul node detaches from the source centralized unit or parent node; When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink; When the integrated access and backhaul node initiates a random access process to a new parent node or a target parent node; When the integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to a new parent node or a target parent node; When the integrated access and backhaul node random access process is successful; When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

3. The device according to claim 1, wherein: The indication information enables or disables the wireless device: Apply the configuration in the second reconfiguration message.

4. The device according to claim 3, wherein: In the second reconfiguration message, a target candidate cell having the same identifier as the current serving cell of the integrated access and backhaul node is configured once.

5. The device as claimed in claim 3, wherein: The indication information enables the wireless device to apply the configuration of the target candidate cell having the same identifier as the current serving cell in the second reconfiguration message.

6. The device according to claim 1, wherein: The indication information indicates information of the centralized unit, The centralized unit refers to the centralized unit to which the integrated access and backhaul node is to be connected or has been connected based on the first reconfiguration message.

7. The device according to claim 6, wherein: The second reconfiguration message includes the information of the centralized unit and the configuration corresponding to the information of the centralized unit.

8. The device of claim 1, wherein: The indication information indicates the configuration applied by the wireless device.

9. The device of claim 8, wherein: The device also includes: A second receiving unit is configured to receive corresponding relationship indication information. The corresponding relationship indication information is used to indicate: a correspondence between the identification information of the configuration in the second reconfiguration message and the identification information of the target cell in the first reconfiguration message; or a correspondence between the configuration identification information in the second reconfiguration message and the configuration identification information in the first reconfiguration message; or The target cell and the identification information of the configuration included in the second reconfiguration message or the corresponding relationship between the configuration.

10. The device of claim 1, wherein: The first sending unit sends the indication information to the wireless device by returning an adaptive protocol data unit, a radio link layer control protocol data unit, a media access control control information element, a media access control subheader or a physical layer signaling.

11. A signal receiving device, provided in a wireless device, the signal receiving device comprising: a third receiving unit, which receives a message combining a second reconfiguration message and indication information, wherein the indication information is used for the wireless device to apply the configuration in the second reconfiguration message received at the radio resource control layer, The third receiving unit receives the second reconfiguration message in the following case: In the process of changing the parent node of the integrated access and backhaul node from the source parent node connected to the source centralized unit to the target parent node connected to the target centralized unit, The source centralized unit of the integrated access and backhaul node sends the second reconfiguration message to the integrated access and backhaul node, and the integrated access and backhaul node sends the second reconfiguration message to the wireless device.

12. The device of claim 11, wherein: The timing at which the third receiving unit receives the indication information sent by the integrated access and backhaul node is one of the following timings: When the integrated access and backhaul node determines that a measurement event related to the conditional reconfiguration is satisfied; When the integrated access and backhaul node initiates execution of conditional switching or conditional reconfiguration; When the integrated access and backhaul node receives a first reconfiguration message; When the integrated access and backhaul node detaches from the source centralized unit or parent node; When the integrated access and backhaul node is synchronized with the new parent node or the target parent node in downlink; When the integrated access and backhaul node initiates a random access process to a new parent node or a target parent node; The integrated access and backhaul node sends a reconfiguration completion message based on the first reconfiguration message to the new parent node or the target parent node; When the integrated access and backhaul node random access process is successful; When the integrated access and backhaul node receives a confirmation message or a feedback message for the reconfiguration completion message from its parent node.

13. The device of claim 11, wherein: The indication information enables or disables the wireless device: The configuration in the second reconfiguration message is applied at the radio resource control layer.

14. The device of claim 13, wherein: The wireless device applies the configuration of the target candidate cell having the same identifier as the current serving cell in the second reconfiguration message at the radio resource control layer.

15. The device of claim 11, wherein: The indication information indicates information of the centralized unit, The centralized unit refers to a centralized unit to which the integrated access and backhaul nodes are to be connected or have been connected based on the first reconfiguration message.

16. The device of claim 15, wherein: The second reconfiguration message includes the information of the centralized unit and the configuration corresponding to the information of the centralized unit, The wireless device determines the configuration corresponding to the information of the centralized unit in the second reconfiguration message according to the information of the centralized unit in the indication information, and applies the configuration at the radio resource control layer.

17. The device of claim 11, wherein: The indication information indicates the configuration applied by the wireless device.

18. The device of claim 16, wherein: The configured identification information in the second reconfiguration message has a corresponding relationship with the identification information of the target cell in the first reconfiguration message; or The configuration identification information in the second reconfiguration message has a corresponding relationship with the configuration identification information in the first reconfiguration message; or The target cell has a corresponding relationship with the identification information of the configuration or the configuration included in the second reconfiguration message.

19. A signal sending device, arranged in a source concentration unit, the signal sending device comprising: a fourth sending unit, configured to send a first reconfiguration message to the integrated access and backhaul node; as well as a fifth sending unit, configured to send a second reconfiguration message to the wireless device, Wherein, the first reconfiguration message is sent to the integrated access and backhaul node in the following cases: The source centralized unit sends a handover request to a target centralized unit of the integrated access and backhaul node, the target centralized unit sends a request to a target parent node of the integrated access and backhaul node, and the target parent node sends a response to the request; After the target centralized unit receives the response sent by the target parent node, sending a handover request confirmation to the source centralized unit of the integrated access and backhaul node; After receiving the handover request confirmation, the source centralized unit sends a terminal device context modification request to the source parent node of the integrated access and backhaul node, and the source parent node sends the first reconfiguration message to the integrated access and backhaul node. The second reconfiguration message is sent to the wireless device in the following cases: In the process of changing the parent node of the integrated access and backhaul node from the source parent node connected to the source centralized unit to the target parent node connected to the target centralized unit, The source centralized unit of the integrated access and backhaul node sends the second reconfiguration message to the integrated access and backhaul node, and the integrated access and backhaul node sends the second reconfiguration message to the wireless device.

20. The device of claim 19, wherein: The wireless device comprises: terminal equipment; or The next level integrated access and backhaul node of the integrated access and backhaul node.

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