Transmission method and device

Abstract

The present invention provides a transmission method and device, belonging to the field of wireless communication technology. Among them, the transmission method is used for a first node or a third node, including: obtaining information of a fifth time-frequency resource, and performing at least one of the following operations on the fifth time-frequency resource: indicating or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being the next-level node of the first node; indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit; not expecting the second node to transmit on the fifth time-frequency resource; not scheduling the second node to transmit on the fifth time-frequency resource; not configuring the second node to transmit on the fifth time-frequency resource. Through the technical solution of the present invention, it is possible to prevent the problem of resource overlap or transmission-reception conflict when the IAB is transmitting.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a transmission method and device. Background Art

[0002] In order to reduce the dependence on optical fiber and reduce the cost, related technologies have introduced Integrated Access and Backhaul (IAB) technology, such as Figure 1 As shown in the figure, in the IAB scenario, there are IAB nodes, the access function of the IAB node is called DU function, and the backhaul function is called MT function. IAB technology uses high-frequency air interface transmission to replace optical fiber backhaul, and can transmit data back to sites with optical fiber transmission capabilities through multi-hop links.

[0003] The resource allocation methods of IAB technology can be divided into the following multiplexing methods: frequency division multiplexing (FDM), time division multiplexing (TDM) and space division multiplexing (SDM). Figure 2 The figure shows a schematic diagram of TDM transmission. Figure 3 The schematic diagram of FDM is shown below. Figure 4 The figure shows a schematic diagram of SDM, where gNB stands for base station, DL stands for downlink, UL stands for uplink, BH-DL stands for backhaul link downlink transmission, and BH-UL stands for backhaul link uplink transmission.

[0004] The current IAB is limited by the half-duplex working mode. That is, when the MT part is working, the DU part cannot work. From the time perspective, it is divided into time resources used by the MT and time resources used by the DU. The indication and configuration of MT resources are based on the DU of the upper-level node. As for the DU part, it is divided into hard resources (hard), soft resources (soft), NA, uplink, downlink, and flexible (flexible). The hard resources, soft resources, and NA resources here can be further divided into hard uplink, hard downlink, hard flexible and similar combination types.

[0005] Among them, hard resources mean that DU can use the corresponding physical resources arbitrarily without considering the resource configuration of MT; while soft resources mean that DU needs to observe whether there is MT scheduling on the corresponding resources first. If not, it can use this resource. If there is scheduling, it cannot use this resource; NA means that the resources in this part of time cannot be used by DU. In related technologies, under specific configurations, resource conflicts between MT and DU inside IAB will occur. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a transmission method and device, which can prevent resource overlap or transmission and reception conflict when the IAB is transmitting.

[0007] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0008] On the one hand, a transmission method is provided, which is used for a first node or a third node, comprising:

[0009] Obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0010] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0011] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0012] It is not expected that the second node transmits on the fifth time-frequency resource;

[0013] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0014] The second node is not configured to transmit on the fifth time-frequency resource.

[0015] Optionally, acquiring the information of the fifth time-frequency resource includes at least one of the following:

[0016] Receiving information about the fifth time-frequency resource reported by the second node;

[0017] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0018] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0019] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0020] The information of the fifth time-frequency resource is configured based on network parameters.

[0021] Optionally, the fifth time-frequency resource is any one of the following:

[0022] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0023] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0024] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0025] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0026] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0027] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0028] Optionally, in at least one of the following cases, the information of the fifth time-frequency resource is obtained:

[0029] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0030] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0031] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0032] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0033] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0034] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0035] Optionally, the instructing or configuring the second node whether to transmit in the fifth time-frequency resource includes any one of the following:

[0036] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0037] In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

[0038] Optionally, indicating that the fifth time-frequency resource is used for transmission by the second node includes:

[0039] Indicate that the fifth time-frequency resource is used for transmission by the DU of the second node or for transmission by the MT of the second node.

[0040] Optionally, the not expecting or not scheduling the second node to transmit on the fifth time-frequency resource includes any one of the following:

[0041] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0042] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0043] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0044] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0045] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0046] The embodiment of the present invention further provides a transmission method, which is applied to a second node and includes:

[0047] Obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0048] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0049] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0050] It is not expected that the second node transmits on the fifth time-frequency resource;

[0051] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0052] The second node is not configured to transmit on the fifth time-frequency resource.

[0053] Optionally, acquiring the information of the fifth time-frequency resource includes at least one of the following:

[0054] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0055] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0056] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0057] The information of the fifth time-frequency resource is configured based on network parameters.

[0058] Optionally, the fifth time-frequency resource is any one of the following:

[0059] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0060] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0061] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0062] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0063] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0064] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0065] Optionally, in at least one of the following cases, the information of the fifth time-frequency resource is obtained:

[0066] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0067] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0068] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0069] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0070] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0071] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0072] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0073] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0074] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0075] Optionally, not expecting and / or not scheduling and / or not configuring transmission on the fifth time-frequency resource includes at least one of the following:

[0076] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0077] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0078] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0079] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0080] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0081] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0082] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0083] The embodiment of the present invention further provides a transmission device, which is used for a first node or a third node, including:

[0084] A processing module is configured to obtain information about a fifth time-frequency resource and perform at least one of the following operations on the fifth time-frequency resource:

[0085] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0086] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0087] It is not expected that the second node transmits on the fifth time-frequency resource;

[0088] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0089] The second node is not configured to transmit on the fifth time-frequency resource.

[0090] Optionally, the processing module is specifically configured to perform at least one of the following:

[0091] Receiving information about the fifth time-frequency resource reported by the second node;

[0092] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0093] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0094] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0095] The information of the fifth time-frequency resource is configured based on network parameters.

[0096] Optionally, the fifth time-frequency resource is any one of the following:

[0097] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0098] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0099] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0100] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0101] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0102] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0103] Optionally, in at least one of the following cases, the processing module obtains the information of the fifth time-frequency resource:

[0104] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0105] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0106] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0107] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0108] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0109] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0110] Optionally, the processing module is used to perform any of the following:

[0111] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0112] In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

[0113] Optionally, the processing module is specifically used for:

[0114] Indicate that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0115] Optionally, the processing module is used to perform any of the following:

[0116] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0117] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0118] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0119] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0120] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0121] The embodiment of the present invention further provides a transmission device, which is used for a first node or a third node, and includes a processor and a transceiver.

[0122] The processor is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0123] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0124] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0125] It is not expected that the second node transmits on the fifth time-frequency resource;

[0126] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0127] The second node is not configured to transmit on the fifth time-frequency resource.

[0128] Optionally, the processor is specifically configured to perform at least one of the following:

[0129] Receiving information about the fifth time-frequency resource reported by the second node;

[0130] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0131] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0132] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0133] The information of the fifth time-frequency resource is configured based on network parameters.

[0134] Optionally, the fifth time-frequency resource is any one of the following:

[0135] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0136] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0137] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0138] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0139] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0140] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0141] Optionally, in at least one of the following cases, the processor obtains the information of the fifth time-frequency resource:

[0142] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0143] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0144] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0145] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0146] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0147] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0148] Optionally, the processor is configured to perform any of the following:

[0149] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0150] In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

[0151] Optionally, the processor is specifically configured to:

[0152] Indicate that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0153] Optionally, the processor is configured to perform any of the following:

[0154] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0155] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0156] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0157] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0158] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0159] The embodiment of the present invention further provides a transmission device, applied to a second node, including:

[0160] A processing module is configured to obtain information about a fifth time-frequency resource and perform at least one of the following operations on the fifth time-frequency resource:

[0161] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0162] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0163] Transmission on the fifth time-frequency resource is not expected and / or not scheduled and / or not configured.

[0164] Optionally, the processing module is used to perform at least one of the following:

[0165] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0166] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0167] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0168] The information of the fifth time-frequency resource is configured based on network parameters.

[0169] Optionally, the fifth time-frequency resource is any one of the following:

[0170] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0171] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0172] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0173] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0174] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0175] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0176] Optionally, in at least one of the following cases, the processing module is used to obtain information about the fifth time-frequency resource:

[0177] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0178] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0179] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0180] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0181] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0182] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0183] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0184] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0185] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0186] Optionally, the processing module is used to perform at least one of the following:

[0187] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0188] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0189] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0190] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0191] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0192] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0193] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0194] The embodiment of the present invention further provides a transmission device, applied to a second node, comprising a processor and a transceiver.

[0195] The processor is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0196] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0197] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0198] Transmission on the fifth time-frequency resource is not expected and / or not scheduled and / or not configured.

[0199] Optionally, the processor is configured to perform at least one of the following:

[0200] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0201] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0202] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0203] The information of the fifth time-frequency resource is configured based on network parameters.

[0204] Optionally, the fifth time-frequency resource is any one of the following:

[0205] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0206] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0207] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0208] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0209] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0210] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0211] Optionally, in at least one of the following cases, the processor is configured to obtain information about the fifth time-frequency resource:

[0212] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0213] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0214] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0215] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0216] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0217] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0218] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0219] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0220] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0221] Optionally, the processor is configured to perform at least one of the following:

[0222] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0223] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0224] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0225] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0226] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0227] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0228] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0229] An embodiment of the present invention further provides a communication device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps in the transmission method described above when executed by the processor.

[0230] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the transmission method described above are implemented.

[0231] The embodiments of the present invention have the following beneficial effects:

[0232] In the above solution, by configuring the time-frequency resources, it is possible to avoid resource overlap or transmission-reception conflict during transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0233] Figure 1 This is a schematic diagram of the IAB scenario;

[0234] Figure 2 This is a schematic diagram of TDM transmission;

[0235] Figure 3 This is a schematic diagram of FDM transmission;

[0236] Figure 4 It is a schematic diagram of SDM transmission;

[0237] Figure 5 A schematic diagram showing the attributes of the previous hop and next hop resources;

[0238] Figure 6 It is a schematic diagram of the non-aligned moments of the MT and DU sides of the IAB;

[0239] Figure 7 Schematic diagram of conflict and no conflict in transmission and reception of MT and DU;

[0240] Figure 8 This is a schematic diagram when the second time slot is in the soft state;

[0241] Fig. 9 Schematic diagram of the time that needs to be reserved to avoid conflicts;

[0242] Fig.10 Schematic diagram of double-sided and single-sided boards used for IAB;

[0243] Fig.11 This is a schematic diagram of IAB uplink transmission;

[0244] Fig.12 is a schematic diagram of a transmission method applied to a first node or a third node according to an embodiment of the present invention;

[0245] Fig.13 is a schematic diagram of a transmission method applied to a second node according to an embodiment of the present invention;

[0246] Figure 14-Figure 21 A schematic diagram of resource status according to an embodiment of the present invention;

[0247] Fig. 22 It is a structural schematic diagram of a transmission device applied to a first node or a third node according to an embodiment of the present invention;

[0248] Fig.23 A schematic diagram of the composition of a transmission device applied to a first node or a third node according to an embodiment of the present invention;

[0249] Fig.24 is a schematic diagram of the structure of a transmission device applied to a second node according to an embodiment of the present invention;

[0250] Fig.25 It is a schematic diagram of the composition of a transmission device applied to a second node according to an embodiment of the present invention. DETAILED DESCRIPTION

[0251] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0252] The attributes of resources in IAB are sent by the control unit (CU) to each IAB node. When the CU is configuring, in order to avoid conflicts between multi-hop links, it will try to coordinate the attributes of the resources of the previous hop and the next hop (hard, soft, NA), such as Figure 5 As shown, for example, when the first downlink resource of the parent node DU is configured as hard, the corresponding DU resource of the child node needs to be configured as NA, so as to ensure that the MT of the child node may be scheduled by the parent node DU at any time; similarly, if the parent node is configured with NA resources, the corresponding MT resources of the child node will not be scheduled, so the DU of the child node can be configured as a hard resource, that is, the DU can be used at will; and if the parent node DU is configured with soft resources, the corresponding resources may or may not be used. In order to avoid the resource being used and schedule the child node MT, the corresponding resource of the child node DU should be configured as NA, and the corresponding resource should be given to the MT for use. In order to improve the efficiency of resource use, this resource can also be configured as soft, so that according to whether part of the child node MT is scheduled, it can be further seen whether the DU can use this resource.

[0253] However, due to the propagation delay of downlink transmission, the timing of the MT and DU side of the child node or IAB is difficult to align, such as Figure 6As shown in the figure, in the case of downlink, due to the transmission delay, the downlink data of the parent node in slot Z will be received by the MT of the child node after a propagation delay. At the next moment, if the DU of the child node is to be sent in slot Y, the slots of the MT and DU will overlap, resulting in simultaneous transmission and reception, which is inconsistent with the existing IAB requirement of meeting half-duplex.

[0254] If the DU of the child node is configured as hard in slot Y, the DU cannot take evasive measures such as not transmitting in advance because it does not know the configuration of the parent node.

[0255] In some scenarios, due to resource configuration, there will be conflicts in the sending and receiving of MT and DU in IAB, but in some cases, there will be no such conflicts. Figure 7 As shown: (1) As shown in the first part of the first row, when the second slot of the parent node is configured as NA in the downlink time slot, the resources of the corresponding child node's DU will be configured as HARD resources. When the previous slot of the parent node is configured as hard resources, the MT corresponding to the child node should receive, and a conflict will occur. (2) As shown in the second part of the first row, when the parent node was NA at the previous moment, the MT corresponding to the child node will not have any business transmission, so there will be no conflict. (3) As shown in the third part of the first row, when the parent node was soft at the previous moment and was indicated as available, the MT corresponding to the child node will conflict with the DU in the second slot. (4) As shown in the fourth part of the first row, when the previous slot of the parent node was soft-NA, the MT corresponding to the child node will not have any transmission, so there will be no conflict. (5) As shown in the first part of the second row, when the second slot of the parent node is HARD, the DU corresponding to the child node is NA, and when the previous slot of the parent node is in any state, there will be no conflict on the IAB of the child node.

[0256] like Figure 8 As shown in the figure, when the second slot of the parent node is in soft state, when the soft resource is indicated as NA, if the parent node was hard at the previous moment, there will be a conflict between MT and DU on the child node. In other cases, there will be no conflict.

[0257] In order to avoid conflicts, the slot behind the child node DU should theoretically give up some time for the transmission of the previous slot and the conversion of uplink and downlink time. Fig. 9 This time mainly includes the downlink transmission time of the parent node DU and the conversion time of the child IAB from receiving in the previous slot to sending downlink in the next slot. This conversion time is the transceiver conversion time of the child node IAB. The time that needs to be reserved is Delta = TP1 + Tg.

[0258] However, the time required to switch between sending and receiving varies on different devices and different IAB formats. Fig.10 As shown in the figure, when IAB is a double-panel, the transceiver between the two panels does not need to share components, so there is no switching time. When the transceiver is from the same panel, the transceiver conversion time needs to be considered. However, due to the different selected components, the transceiver conversion time will be different for different frequency bands. For example, for FR1, the conversion time can be 10-72us, while for FR2, the conversion time can be 3-18us.

[0259] Parent node DU or child node DU needs to know the above delta to avoid conflicts through scheduling or other means. For TP1, the parent node can know it, but Tg is a parameter of the child node. The parent node does not necessarily know whether the child node is a single panel or multi-panel architecture, and what the specific Tg is.

[0260] like Fig.11As shown, the same problem exists for the uplink transmission time slot. In the uplink case, slot Z, when the DU of the parent node is NA, the corresponding child node DU will be configured as hard; and when the DU of the parent node in slot Z+1 is hard, the MT of the child node will perform uplink transmission in the corresponding time slot. At this time, the DU part of the IABchild node may have performed uplink transmission services in slot Z. Therefore, the MT and DU of the child node will overlap in part 2, and the overlapping part is also delta=TP1+Tg. For slot Z, since the scheduling of the child node DU is not restricted by the DU of the parent node, the child node DU will be transmitted in the hard part. In addition, because the child node DU does not know the definition of hard, soft, and NA of the parent node, it is difficult to circumvent it through scheduling.

[0261] The embodiments of the present invention provide a transmission method and device, which can prevent resource overlap or transmission and reception conflict when IAB is transmitting.

[0262] An embodiment of the present invention provides a transmission method, which is used for a first node or a third node, such as Fig.12 As shown, including:

[0263] Step 101: Obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0264] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0265] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0266] It is not expected that the second node transmits on the fifth time-frequency resource;

[0267] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0268] The second node is not configured to transmit on the fifth time-frequency resource.

[0269] In this embodiment, by configuring time-frequency resources, it is possible to avoid resource overlap or transmission-reception conflict during transmission.

[0270] The transmission includes data transmission, reference signal transmission, control information transmission, etc., the scheduled transmission includes scheduled data transmission, and the configured transmission includes non-data transmission. The above transmission may include transmission on the DU side and transmission on the MT side.

[0271] Among them, the first node and the third node can be an IAB node, a relay or a base station, or a terminal with a relay or backhaul function or a function of transmitting data to other terminals. The IAB node can be a relay node, a base station, or a user terminal with a backhaul or relay function.

[0272] The first node may be a parent node in the IAB network, and the third node may be a Cu or a donor. The fifth information of the time-frequency resource includes the location information, number, size, etc. of the time-frequency resource.

[0273] Optionally, acquiring the information of the fifth time-frequency resource includes at least one of the following:

[0274] Receiving information about the fifth time-frequency resource reported by the second node;

[0275] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0276] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0277] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0278] The information of the fifth time-frequency resource is configured based on network parameters, and this configuration may include parameter configuration based on a network management system.

[0279] Optionally, the fifth time-frequency resource is any one of the following:

[0280] At least one time slot; at least one symbol; absolute time; a specific time length in units of Ts, where the absolute time can be ms, etc.

[0281] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0282] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0283] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0284] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0285] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0286] Optionally, in at least one of the following cases, the information of the fifth time-frequency resource is obtained:

[0287] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0288] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0289] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0290] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0291] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0292] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0293] In the above embodiment, the first state is the hard state, and the DU of the corresponding resource can be transmitted, including sending and receiving; the second state is the soft state, and the corresponding resource DU needs to determine whether it can be used for transmission based on whether it is used by the MT side. If the MT side is not scheduled or sends or receives a signal, the DU can use the resource; if the MT receives an indication of "can be used", the corresponding resource can be used by the DU. The third state is the NA state, and the DU cannot use the corresponding resource.

[0294] In a specific example, Figure 7 and Figure 8 As shown, the previous time slot of the parent DU is configured as the hard state, and the next time slot is configured as the NA state; or, for the child DU, the previous slot is configured as the NA state, and the next slot is configured as the hard state; or, the first slot of the parent DU is configured as the hard state, and the second slot of the child DU is configured as the hard state.

[0295] Among them, the first to fourth resources mentioned above include time units and time domain resources.

[0296] In a specific embodiment, any one of operations A to J is performed when at least one of the following conditions is met:

[0297] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0298] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0299] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0300] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0301] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0302] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0303] Operation A: the first node instructs or configures the second node whether to transmit in the fifth time-frequency resource, and the second node is a node at a lower level than the first node;

[0304] Operation B: the first node indicates that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0305] Operation C: the first node does not expect the second node to transmit on the fifth time-frequency resource;

[0306] Operation D: The first node does not schedule the second node to transmit on the fifth time-frequency resource;

[0307] Operation E: The first node does not configure the second node to transmit on the fifth time-frequency resource;

[0308] Operation F: the first node instructs or configures the second node whether to transmit in the fifth time-frequency resource, where the second node is a node at a lower level than the first node;

[0309] Operation G: the first node indicates that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0310] Operation H: the first node does not expect the second node to transmit in the fifth time-frequency resource;

[0311] Operation I: the first node does not schedule the second node to transmit on the fifth time-frequency resource;

[0312] Operation J: The first node does not configure the second node to transmit on the fifth time-frequency resource.

[0313] In a specific example, the first node (parent IAB) receives information about the fifth time-frequency resource reported by the second node (child IAB), or obtains information about the fifth time-frequency resource based on conflicting resource information configured by the system. The first node (parent IAB) configures the child IAB (second node) based on the obtained fifth time-frequency resource information not to transmit on the corresponding fifth time-frequency resource (e.g., not scheduling data services, or not configuring downlink CSI-RS transmission); or the Parent IAB does not expect the child IAB to transmit on the fifth time-frequency resource at the front of the second slot.

[0314] In another specific example, the information of the fifth time-frequency resource is reported to the third node (CU or donor base station), and the donor base station or CU configures the parent IAB to use the corresponding fifth time-frequency resource for transmission, or instructs the child IAB to transmit data or other signals using the resource.

[0315] Optionally, the instructing or configuring the second node whether to transmit in the fifth time-frequency resource includes any one of the following:

[0316] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0317] In uplink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit;

[0318] Here, rewriting means that the instruction can override, cover or update the resource status of the original network configuration.

[0319] Optionally, indicating that the fifth time-frequency resource is used for transmission by the second node includes:

[0320] Indicate that the fifth time-frequency resource is used for transmission by the DU of the second node or for transmission by the MT of the second node.

[0321] Optionally, the not expecting or not scheduling the second node to transmit on the fifth time-frequency resource includes any one of the following:

[0322] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0323] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0324] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0325] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0326] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0327] The embodiment of the present invention also provides a transmission method, which is applied to a second node, such as Fig.13 As shown, including:

[0328] Step 201: Acquire information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0329] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0330] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0331] Transmission on the fifth time-frequency resource is not expected and / or not scheduled and / or not configured.

[0332] In this embodiment, by configuring time-frequency resources, it is possible to avoid resource overlap or transmission-reception conflict during transmission.

[0333] The transmission includes data transmission, reference signal transmission, control information transmission, etc., the scheduled transmission includes scheduled data transmission, and the configured transmission includes non-data transmission. The above transmission may include transmission on the DU side and transmission on the MT side.

[0334] The first node and the third node may be IAB nodes, relays or base stations, or terminals having a relay or backhaul function or a function of transmitting data to other terminals.

[0335] The first node may be a parent node in the IAB network, the third node may be a Cu or a donor, and the second node may be a child node in the IAB network. The fifth information of the time-frequency resource includes the location information, number, size, etc. of the time-frequency resource.

[0336] The IAB node may be a relay node, a base station, or a user terminal with a backhaul or relay function. Optionally, obtaining the information of the fifth time-frequency resource includes at least one of the following:

[0337] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0338] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0339] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0340] The information of the fifth time-frequency resource is configured based on network parameters, and this configuration may include parameter configuration based on a network management system.

[0341] Optionally, the fifth time-frequency resource is any one of the following:

[0342] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0343] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0344] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0345] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0346] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0347] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0348] Optionally, in at least one of the following cases, the information of the fifth time-frequency resource is obtained:

[0349] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0350] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0351] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0352] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0353] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0354] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0355] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0356] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0357] Among them, the first to fourth resources mentioned above include time units and time domain resources.

[0358] Here, rewriting means that the instruction can override, cover or update the resource status of the original network configuration.

[0359] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0360] Optionally, not expecting and / or not scheduling and / or not configuring transmission on the fifth time-frequency resource includes at least one of the following:

[0361] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0362] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0363] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0364] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0365] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0366] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0367] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0368] In the above embodiment, the first state is the hard state, and the DU of the corresponding resource can be transmitted, including sending and receiving; the second state is the soft state, and the corresponding resource DU needs to determine whether it can be used for transmission based on whether it is used by the MT side. If the MT side is not scheduled or sends or receives a signal, the DU can use the resource; if the MT receives an indication of "can be used", the corresponding resource can be used by the DU. The third state is the NA state, and the DU cannot use the corresponding resource.

[0369] like Figure 14-21 As shown, T1 is the first time unit or the first time-frequency resource, T2 is the second time unit or the second time-frequency resource, T3 is the third time unit or the third time-frequency resource, T4 is the fourth time unit or the fourth time-frequency resource, the first node is the Parent node, and the second node is the Child node.

[0370] In a specific embodiment, Fig.14 As shown, in downlink transmission, the Child node does not expect that the MT will transmit on the first X time-frequency resources or time resources of the hard resource (corresponding to the part in the dotted box in the figure); and / or, the MT will transmit on the last X time-frequency resources (corresponding to the part in the dotted box in the figure).

[0371] Alternatively, the Parent node does not schedule the last X time-frequency resources of the MT for transmission.

[0372] Alternatively, the parent node does not expect the child DU to transmit the first X video resources.

[0373] In another specific embodiment, Fig.15As shown, in uplink and downlink transmission, the Child node does not expect to transmit (send) on the first X time-frequency resources on the MT side, as shown in the figure where dots are filled in front of the MT.

[0374] Alternatively, the Parent node does not schedule the transmission of hard resources or the first X time-frequency resources of slot Z.

[0375] Alternatively, the parent node does not expect the child node to transmit on the corresponding time-frequency resource X.

[0376] Alternatively, the child node or DU will not transmit (receive) on the last X time-frequency resources, as shown in the dotted portion in front of the DU in the figure.

[0377] In another specific embodiment, Fig.16 As shown, in downlink transmission, the time-frequency resource Y is configured as HARD state by CU or other network nodes or protocols, and the Parent node configures and / or updates and / or rewrites the first X time-frequency resources of the child DU (corresponding to the part in the dotted box in the figure) as NA or soft state.

[0378] In another specific embodiment, Fig.17 As shown, in uplink transmission, the time-frequency resource Y is configured as HARD state for CU or other network nodes or protocols, and after the Parent node configures and / or updates and / or rewrites the child DU, X time-frequency resources (corresponding to the dotted part in the figure) are in NA or soft state.

[0379] In another specific embodiment, Fig.18 As shown, in downlink transmission, the Parent node or other nodes indicate that the time-frequency resource X is used by the parent DU, or by the child MT, or by the child DU.

[0380] In another specific embodiment, Fig.19 As shown, in uplink transmission, the Parent node or other node indicates that the time-frequency resource X is used by the parent DU, or by the child MT, or by the child DU

[0381] In a specific example, the CU configures parent node slot 1 as hard resources and slot 2 as NA resources. Correspondingly, in order to ensure that the resources of the child DU do not conflict with the parent configuration, the resources corresponding to slot 1 are NA, and the resources corresponding to slot 2 are HARD. Since the resources of slot 1 of the parent DU are HARD, it can be transmitted at will. The child MT needs to receive the corresponding slot 1 again. Due to the propagation delay and switching delay, the slot 2 of the childDU may conflict with the child MT.

[0382] When the child IAB uses two panels to work, the reception and transmission of the child MT work on the two panels respectively. At this time, the overlapping resource X can be 0 symbols. In this case, the child IAB does not need to report the overlapping resources, and the parent DU and child DU do not need to restrict their respective scheduling.

[0383] When the MT and DU of child IAB use the same panel / radio frequency to work, the switching delay and propagation delay will cause X time-frequency resources of MT and DU to overlap or conflict. Parent DU can calculate the length or time information of resource X based on the propagation delay and switching delay. Or the child can report X or Y (Y is greater than X) time-frequency resource information to the parent node. The information X or Y can also be configured by the CU or upper node to the parent node.

[0384] The parent node does not schedule on the time-frequency resource corresponding to X, or only schedules 14-X symbols, or only considers that transmission can be performed on 14-X symbols.

[0385] The Child DU is transmitted on the hard resource corresponding to slot 2.

[0386] In another specific example, when the resource configuration is HARD first and NA later, the parent node can indicate that the X resources corresponding to the child DU are not available for transmission. Or the Child DU determines that the first X resources of HARD are unavailable based on the upper layer signaling or configuration information of other network entities such as CU.

[0387] In another specific example, when the resource configuration is HARD first and NA later, the parent node or CU or other network entity may indicate that the corresponding X resource may be used by the parent DU, or by the child MT, or by the child DU.

[0388] In addition, when resources are allocated as Fig. 20 and Fig.21 When shown, the child IAB does not need to report the length of the X resource or the length of the X resource configured by the system, and no resource conflict will occur.

[0389] Under certain configurations, resource conflicts may occur between the MT and DU within the IAB. This embodiment stipulates that no scheduling is performed on the corresponding time-frequency resources, or that the resource status is updated, or that the right to use the resource is indicated, so that there will be no resource overlap or transmission / reception conflicts when the IAB is transmitting.

[0390] The embodiment of the present invention further provides a transmission device, which is used for a first node or a third node. Fig. 22 As shown, including:

[0391] The processing module 31 is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0392] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0393] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0394] It is not expected that the second node transmits on the fifth time-frequency resource;

[0395] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0396] The second node is not configured to transmit on the fifth time-frequency resource.

[0397] Optionally, the processing module 31 is specifically configured to perform at least one of the following:

[0398] Receiving information about the fifth time-frequency resource reported by the second node;

[0399] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0400] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0401] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0402] The information of the fifth time-frequency resource is configured based on network parameters.

[0403] Optionally, the fifth time-frequency resource is any one of the following:

[0404] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0405] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0406] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0407] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0408] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0409] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0410] Optionally, in at least one of the following cases, the processing module 31 obtains the information of the fifth time-frequency resource:

[0411] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0412] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0413] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0414] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0415] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0416] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0417] Optionally, the processing module 31 is used to perform any of the following:

[0418] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0419] In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

[0420] Optionally, the processing module 31 is specifically used for:

[0421] Indicate that the fifth time-frequency resource is used for transmission by the DU of the second node or for transmission by the MT of the second node.

[0422] Optionally, the processing module is used to perform any of the following:

[0423] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0424] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0425] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0426] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0427] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0428] The embodiment of the present invention further provides a transmission device, which is used for a first node or a third node. Fig.23 As shown, it includes a processor 41 and a transceiver 42,

[0429] The processor 41 is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0430] Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node;

[0431] Indicating that the fifth time-frequency resource is used for the first node to transmit or the second node to transmit;

[0432] It is not expected that the second node transmits on the fifth time-frequency resource;

[0433] Not scheduling the second node to transmit on the fifth time-frequency resource;

[0434] The second node is not configured to transmit on the fifth time-frequency resource.

[0435] Optionally, the processor 41 is specifically configured to perform at least one of the following:

[0436] Receiving information about the fifth time-frequency resource reported by the second node;

[0437] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0438] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0439] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0440] The information of the fifth time-frequency resource is configured based on network parameters.

[0441] Optionally, the fifth time-frequency resource is any one of the following:

[0442] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0443] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0444] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0445] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0446] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0447] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0448] Optionally, in at least one of the following cases, the processor 41 acquires the information of the fifth time-frequency resource:

[0449] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0450] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0451] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0452] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0453] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0454] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0455] Optionally, the processor 41 is configured to perform any of the following:

[0456] In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0457] In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

[0458] Optionally, the processor 41 is specifically configured to:

[0459] Indicate that the fifth time-frequency resource is used for transmission by the DU of the second node or for transmission by the MT of the second node.

[0460] Optionally, the processor is configured to perform any of the following:

[0461] In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource;

[0462] In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource;

[0463] In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource;

[0464] In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

[0465] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0466] The embodiment of the present invention further provides a transmission device, which is applied to a second node, such as Fig.24 As shown, including:

[0467] The processing module 51 is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0468] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0469] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0470] Transmission on the fifth time-frequency resource is not expected and / or not scheduled and / or not configured.

[0471] Optionally, the processing module 51 is configured to perform at least one of the following:

[0472] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0473] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0474] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0475] The information of the fifth time-frequency resource is configured based on network parameters.

[0476] Optionally, the fifth time-frequency resource is any one of the following:

[0477] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0478] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0479] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0480] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0481] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0482] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0483] Optionally, in at least one of the following cases, the processing module 51 is used to obtain information about the fifth time-frequency resource:

[0484] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0485] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0486] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0487] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0488] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0489] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0490] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0491] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0492] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0493] Optionally, the processing module 51 is configured to perform at least one of the following:

[0494] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0495] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0496] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0497] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0498] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0499] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0500] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0501] The embodiment of the present invention further provides a transmission device, which is applied to a second node, such as Fig.25 As shown, it includes a processor 61 and a transceiver 62,

[0502] The processor 61 is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource:

[0503] receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node;

[0504] receiving a second message from the first node or the third node, where the second message indicates that the fifth time-frequency resource is used for transmission by the first node or transmission by the second node;

[0505] Transmission on the fifth time-frequency resource is not expected and / or not scheduled and / or not configured.

[0506] Optionally, the processor 61 is configured to perform at least one of the following:

[0507] receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource;

[0508] receiving a media intervention control element, wherein the media intervention control element is configured with information about the fifth time-frequency resource;

[0509] The information of the fifth time-frequency resource is calculated according to at least one of the following information: propagation delay, switching delay, and processing delay;

[0510] The information of the fifth time-frequency resource is configured based on network parameters.

[0511] Optionally, the fifth time-frequency resource is any one of the following:

[0512] At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

[0513] Optionally, the time unit or time-frequency resource of the first node and the second node is configured as any one of the following: a first state, a second state, and a third state;

[0514] Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

[0515] Optionally, some time units or some time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time units or time-frequency resources are in the third state.

[0516] Optionally, the time unit or time-frequency resource in the first state is a time unit or time-frequency resource in the second state and is indicated as being usable for DU transmission;

[0517] The time unit or time-frequency resource in the third state is the time unit or time-frequency resource in the second state that has not received an indication that it can be used for DU transmission, or the time unit or time-frequency resource in the second state corresponds to the part of the MT that is scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

[0518] Optionally, in at least one of the following cases, the processor is configured to obtain information about the fifth time-frequency resource:

[0519] In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource;

[0520] In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource;

[0521] In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource;

[0522] In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource;

[0523] In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource;

[0524] In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

[0525] Optionally, in downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit;

[0526] In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

[0527] Optionally, the second message indicates that the fifth time-frequency resource is used for transmission of the DU of the second node or for transmission of the MT of the second node.

[0528] Optionally, the processor 61 is configured to perform at least one of the following:

[0529] In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource;

[0530] In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource;

[0531] In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource;

[0532] In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource;

[0533] In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource;

[0534] In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

[0535] Optionally, the time unit includes at least one symbol or at least one time slot or at least one subframe.

[0536] An embodiment of the present invention further provides a communication device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps in the transmission method described above when executed by the processor.

[0537] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the transmission method described above are implemented.

[0538] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0539] For software implementation, the techniques described herein can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0540] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0541] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0542] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, user terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing user terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing user terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0543] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing user terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0544] These computer program instructions can also be loaded onto a computer or other programmable data processing user terminal device, so that a series of operating steps are executed on the computer or other programmable user terminal device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable user terminal device provide for implementing the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0545] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0546] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or user terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or user terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or user terminal device including the elements.

[0547] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A transmission method, characterized in that: For the first or third node, including: Obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource: Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

2. The transmission method according to claim 1, characterized in that: Acquiring the information of the fifth time-frequency resource includes at least one of the following: Receiving information about the fifth time-frequency resource reported by the second node; receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource; receiving a control element for media intervention control, wherein the control element for media intervention control is configured with information about the fifth time-frequency resource; The fifth time-frequency resource information is calculated based on at least one of the following information: propagation delay, switching delay time, processing delay time; The information of the fifth time-frequency resource is configured based on network parameters.

3. The transmission method according to claim 2, characterized in that: The fifth time-frequency resource is any one of the following: At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

4. The transmission method according to claim 1, characterized in that: The time-frequency resources of the first node and the second node are configured as any one of the following: a first state, a second state, and a third state; Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

5. The transmission method according to claim 4, characterized in that: Part of the time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time-frequency resources are in the third state.

6. The transmission method according to claim 4, characterized in that: The time-frequency resources in the first state are time-frequency resources in the second state indicated as being usable for DU transmission; The time-frequency resources in the third state are the time-frequency resources in the second state for which no indication that they can be used for DU transmission is received, or the time-frequency resources in the second state corresponding to the part of the MT that is scheduled and / or configured as at least one of the following, wherein the time-frequency resources are scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

7. The transmission method according to claim 4, characterized in that: In at least one of the following cases, the information of the fifth time-frequency resource is obtained: In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource; In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource; In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource; In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource; In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource; In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

8. The transmission method according to claim 4, characterized in that: The instructing or configuring the second node whether to transmit on the fifth time-frequency resource includes any one of the following: In downlink transmission, instructing or configuring or rewriting the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit; In uplink transmission, the state of the fifth time-frequency resource in the third resource of the second node is indicated, configured, or rewritten to be the third state or the second state or not transmitted.

9. The transmission method according to claim 7, characterized in that: The not expecting or not scheduling the second node to transmit on the fifth time-frequency resource includes any one of the following: In downlink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the third resource and / or to transmit in the fifth time-frequency resource in the first resource; In downlink transmission, the first node does not expect the second node to transmit in a fifth time-frequency resource in the fourth resource; In uplink transmission, the first node does not schedule and / or configure the second node to transmit in the fifth time-frequency resource in the fourth resource and / or to transmit in the fifth time-frequency resource in the second resource; In uplink transmission, the first node does not expect the second node to transmit in the fifth time-frequency resource in the third resource.

10. A transmission method, characterized in that: Applied to the second node, including: Obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource: receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

11. The transmission method according to claim 10, characterized in that: Acquiring the information of the fifth time-frequency resource includes at least one of the following: receiving a high-layer signaling, wherein the high-layer signaling is configured with information about the fifth time-frequency resource; receiving a control element for media intervention control, wherein the control element for media intervention control is configured with information about the fifth time-frequency resource; The fifth time-frequency resource information is calculated based on at least one of the following information: propagation delay, switching delay time, processing delay time; The information of the fifth time-frequency resource is configured based on network parameters.

12. The transmission method according to claim 10, characterized in that: The fifth time-frequency resource is any one of the following: At least one time slot; at least one symbol; absolute time; specific time length in units of Ts.

13. The transmission method according to claim 10, characterized in that: The time-frequency resources of the first node and the second node are configured as any one of the following: a first state, a second state, and a third state; Among them, in the first state, the distributed unit DU of the node can transmit; in the third state, the DU of the node cannot transmit; in the second state, the DU of the node can transmit when the mobile terminal unit MT of the node is not transmitting.

14. The transmission method according to claim 13, characterized in that: Part of the time-frequency resources of the first node and the second node are configured as two of the three states, and the remaining time-frequency resources are in the third state.

15. The transmission method according to claim 13, characterized in that: The time-frequency resources in the first state are time-frequency resources in the second state indicated as being usable for DU transmission; The time-frequency resources in the third state are the time-frequency resources in the second state for which no indication that they can be used for DU transmission is received, or the time-frequency resources in the second state corresponding to the part of the MT that is scheduled and / or configured as at least one of the following, wherein the time-frequency resources are scheduled and / or configured as at least one of the following: periodic and / or semi-continuous transmission, transmission of a semi-statically configured channel, transmission of a reference signal, and transmission of specific time-frequency resources.

16. The transmission method according to claim 13, characterized in that: In at least one of the following cases, the information of the fifth time-frequency resource is obtained: In downlink transmission, the first resource of the first node is configured to be in a first state or to be transmitted, the second resource of the first node is configured to be in a third state or not to be transmitted, and the second resource is located after the first resource; In downlink transmission, the third resource of the second node is configured as a third state or is not to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the third resource; In downlink transmission, the first resource of the first node is configured as a first state or is to be transmitted, the fourth resource of the second node is configured as a first state or is to be transmitted, and the fourth resource is located after the first resource; In uplink transmission, the third resource of the second node is configured to be in the first state or to be transmitted, the fourth resource of the second node is configured to be in the third state or not to be transmitted, and the fourth resource is located after the third resource; In uplink transmission, the first resource of the first node is configured to be in the third state or not to be transmitted, the second resource of the first node is configured to be in the first state or to be transmitted, and the second resource is located after the first resource; In uplink transmission, the third resource of the second node is configured as a first state or to be transmitted, the second resource of the first node is configured as a first state or to be transmitted, and the second resource is located after the third resource.

17. The transmission method according to claim 13, characterized in that: In downlink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the fourth resource of the second node to be the third state or the second state or not to transmit; In uplink transmission, the first message indicates or configures or rewrites the state of the fifth time-frequency resource in the third resource of the second node to be the third state or the second state or not to transmit.

18. The transmission method according to claim 16, characterized in that: Not expecting and / or not scheduling and / or not configuring transmission on the fifth time-frequency resource includes at least one of the following: In downlink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the third resource; In downlink transmission, the first node is not expected to schedule and / or configure transmission and / or perform transmission on the fifth time-frequency resource in the first resource; In downlink transmission, the DU of the second node is not expected and / or configured and / or scheduled to be transmitted on the fifth time-frequency resource in the fourth resource; In uplink transmission, the DU of the second node is not scheduled and / or configured to be transmitted on the fifth time-frequency resource in the third resource; In uplink transmission, the MT of the second node is not expected to transmit on the fifth time-frequency resource in the fourth resource; In uplink transmission, the first node is not expected to configure and / or schedule transmission and / or perform transmission on the fifth time-frequency resource in the second resource.

19. A transmission device, characterized in that: For the first or third node, including: A processing module is configured to obtain information about a fifth time-frequency resource and perform at least one of the following operations on the fifth time-frequency resource: Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

20. A transmission device, characterized in that: For a first node or a third node, comprising a processor and a transceiver, The processor is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource: Instructing or configuring a second node whether to transmit on the fifth time-frequency resource, the second node being a node at a lower level than the first node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

21. A transmission device, characterized in that: Applied to the second node, including: A processing module is configured to obtain information about a fifth time-frequency resource and perform at least one of the following operations on the fifth time-frequency resource: receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

22. A transmission device, characterized in that: applied to the second node, including a processor and a transceiver, The processor is configured to obtain information about a fifth time-frequency resource, and perform at least one of the following operations on the fifth time-frequency resource: receiving a first message from a first node or a third node, where the first message indicates or configures whether the second node transmits on the fifth time-frequency resource, and the first node is an upper-level node of the second node; It is not expected that the second node transmits on the fifth time-frequency resource; Not scheduling the second node to transmit on the fifth time-frequency resource; Not configuring the second node to transmit on the fifth time-frequency resource; The fifth time-frequency resource includes any one of the following: The last X time-frequency resources of the time slot of the DU of the second node; The first X time-frequency resources of the time slot of the MT of the second node; The last X time-frequency resources of the time slot of the MT of the second node; The first X time-frequency resources of the time slot of the DU of the second node; The X time-frequency resources are time-frequency resources in which the transmission of the MT and the DU overlap or conflict, X is a positive integer, the first node includes a mother node in the IAB network, the second node includes a child node in the IAB network, and the third node includes a control unit CU or a donor base station.

23. A communication device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps in the transmission method according to any one of claims 1 to 18 are implemented.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the transmission method according to any one of claims 1 to 18 are implemented.

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