Symbol reservation, inquiry, notification method, first node, second node and medium

Abstract

The present application provides a method for symbol reservation, inquiry, and notification, a first node, a second node, and a medium. The method determines a first element set; and sends a request message, where the request message is used to request reservation or non-reservation of a guard symbol when an element in the first element set is transmitted by a second unit of the first node at a handover point.

Description

Technical Field

[0001] This application relates to a wireless communication network, for example, to a symbol reservation, inquiry, notification method, a first node, a second node, and a medium. Background Art

[0002] In an Integrated Access and Backhaul (IAB) network, for an IAB node, its upper-level node is called a parent node, and its lower-level node is a child node. The IAB node includes a first unit and a second unit. The first unit is used for data transmission with the parent node, and the second unit is used for data transmission with the child node. The timing of the first unit is controlled by the scheduling of the parent node, and the second unit determines the timing of downlink transmission according to the time information provided by the parent node, a timing system such as the Global Positioning System (GPS) or Beidou, and determines the timing of uplink reception according to the uplink scheduling of the child node or terminal. There is a certain deviation in the timing between the first unit and the second unit. By introducing a guard symbol, a protection interval for the conversion between the data transmissions of the first unit and the second unit can be achieved. However, it is uncertain under what circumstances the second node reserves the guard symbol. Since there is no effective mechanism for reserving the guard symbol to clarify the reservation situation of the guard symbol, the IAB node cannot accurately switch to perform data transmission operations. Summary of the Invention

[0003] This application provides a symbol reservation, inquiry, notification method, a first node, a second node, and a medium to achieve reserving or not reserving a guard symbol for the case of transmitting a first set of elements, and improve the certainty and reliability of symbol reservation.

[0004] An embodiment of this application provides a symbol reservation method applied to a first node, including:

[0005] Determine a first set of elements;

[0006] Send a request message, where the request message is used to request reserving or not reserving a guard symbol at a handover and when the second unit of the first node transmits an element in the first set of elements.

[0007] An embodiment of this application also provides a symbol reservation method applied to a second node, including:

[0008] Determine a first set of elements;

[0009] Send an indication message, where the indication message is used to notify the first node that the second node reserves or does not reserve a guard symbol at a handover and when the second unit of the first node transmits an element in the first set of elements.

[0010] An embodiment of the present application also provides an inquiry method, which is applied to a first node and includes:

[0011] Determine a first set of elements;

[0012] Send an inquiry message, where the inquiry message is used to query the known information of a second node about the first set of elements. Among them, the first set of elements is used to reserve or not reserve guard symbols at the handover point and when the second unit of the first node transmits the elements in the first set of elements.

[0013] An embodiment of the present application also provides a notification method, which is applied to a second node and includes:

[0014] Determine a first set of elements;

[0015] Send a notification message, where the notification message is used to notify the first node of the known information of the second node about the first set of elements. Among them, the first set of elements is used to reserve or not reserve guard symbols at the handover point and when the second unit of the first node transmits the elements in the first set of elements.

[0016] An embodiment of the present application also provides a first node, including:

[0017] One or more processors;

[0018] A storage device for storing one or more programs;

[0019] When the one or more programs are executed by the one or more processors, the one or more processors implement the above symbol reservation method or inquiry method applied to the first node.

[0020] An embodiment of the present application also provides a second node, including:

[0021] One or more processors;

[0022] A storage device for storing one or more programs;

[0023] When the one or more programs are executed by the one or more processors, the one or more processors implement the above symbol reservation method or notification method applied to the second node.

[0024] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the above symbol reservation method, inquiry method or notification method. Description of the Drawings

[0025] Figure 1 Flowchart of a symbol reservation method provided for an embodiment;

[0026] Figure 2 Schematic diagram of the operation switching from the first unit to the second unit of the first node provided for an embodiment;

[0027] Figure 3 Schematic diagram of the operation switching from the second unit to the first unit of the first node provided for an embodiment;

[0028] Figure 4 Schematic diagram of a method for sending request information through MAC CE provided for an embodiment;

[0029] Figure 5 Schematic diagram of a method for requesting to reserve or not reserve protection symbols through MAC CE provided for an embodiment;

[0030] Figure 6 Flowchart of a symbol reservation method provided for another embodiment;

[0031] Figure 7 Flowchart of an inquiry method provided for an embodiment;

[0032] Figure 8 Flowchart of a notification method provided for an embodiment;

[0033] Figure 9 Schematic diagram of the structure of a resource symbol reservation device provided for an embodiment;

[0034] Figure 10 Schematic diagram of the structure of a resource symbol reservation device provided for another embodiment;

[0035] Figure 11 Schematic diagram of the structure of a query device provided for an embodiment;

[0036] Figure 12 Schematic diagram of the structure of a notification device provided for an embodiment;

[0037] Figure 13 Schematic diagram of the hardware structure of a first node provided for an embodiment;

[0038] Figure 14 Schematic diagram of the hardware structure of a second node provided for an embodiment. Detailed implementation manners

[0039] The present application will be described below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily. Additionally, it should be noted that for ease of description, only the parts related to the present application rather than all the structures are shown in the drawings.

[0040] In an embodiment of the present application, a symbol reservation method is provided. The first node requests the second node to reserve or not reserve guard symbols for the transmission of elements in the first element set at the handover, so as to clarify the reservation situation of the guard symbols and improve the certainty and reliability of the guard symbol reservation. On this basis, the first node can accurately perform data transmission operations.

[0041] Figure 1 It is a flowchart of a symbol reservation method provided for an embodiment. This method can be applied to the first node. As Figure 1 shown, the method provided in this embodiment includes step 110 and step 120.

[0042] In step 110, the first element set is determined.

[0043] In step 120, a request message is sent, and the request message is used to request to reserve or not reserve guard symbols when handing over and when the elements in the first element set are transmitted by the second unit of the first node.

[0044] In this embodiment, the first node includes a first unit and a second unit. Among them, the sending or receiving operation of the first unit is controlled by the scheduling of the second node; the second unit is used to schedule the next-level sub-node, and the next-level sub-node can be a sub-node of the same type as the first node or a terminal device. The first node can be an IAB node, the second node is the parent node of the IAB node, the first unit is the unit for communicating with the second node, such as the Mobile Terminal (MT) unit of the IAB node, and the second unit is the unit for communicating with the next-level sub-node, such as the Distributed Unit (DU) of the IAB node.

[0045] In this embodiment, the meaning of reserving a protection symbol is that the second node does not schedule one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols corresponding to the first unit of the first node. The meaning of handover is, for example, that for two adjacent time units, in the first time unit, the first unit of the first node performs a transmit or receive operation, and in the second time unit, the second unit of the first node performs a transmit or receive operation for the elements in the first element set; or, in the first time unit, the second unit of the first node performs a transmit or receive operation for the elements in the first element set, and in the second time unit, the first unit of the first node performs a transmit or receive operation.

[0046] The meaning of handover is, for example, that for two adjacent time units, in the first time unit, the second unit of the first node performs a transmit or receive operation on the first attribute resource, and in the second time unit, the second unit of the first node performs a transmit or receive operation on the second attribute resource; or, in the first time unit, the second unit of the first node performs a transmit or receive operation on the second attribute resource, and in the second time unit, the second unit of the first node performs a transmit or receive operation on the first attribute resource.

[0047] The meaning of handover is, for example, that for two adjacent time units, in the first time unit, it corresponds to the first attribute resource of the second unit of the first node, and in the second time unit, it corresponds to the second attribute resource of the second unit of the first node; or in the first time unit, it corresponds to the second attribute resource of the second unit of the first node, and in the second time unit, it corresponds to the first attribute resource of the second unit of the first node.

[0048] In this embodiment, the first node requests the second node, which means that in the case where the second unit of the first node transmits or receives elements in the first element set at the handover, the first node requests the second node to reserve a protection symbol, or requests the second node not to reserve a protection symbol.

[0049] In this embodiment, the first element set is used to indicate the case where the first node requests the second node to execute the guard symbol reservation mechanism when transmitting a certain signal and / or a certain channel. For example, if the first element set includes the Physical Downlink Control Channel (PDCCH) in the Type 0 search space, the request information can be used to request the second node to reserve guard symbols when switching and when the second unit of the first node transmits the PDCCH in the Type 0 search space. If the second unit of the first node does not transmit the PDCCH in the Type 0 search space, the second node is not requested to reserve guard symbols. For another example, if the first element set includes the Synchronization Signal Block And Physical Broadcast Channel (SSB), the request information can be used to request the second node not to reserve guard symbols when switching and when the second unit of the first node transmits the SSB. For another example, if the first element set includes the Scheduling Request (SR), the request information can be used to request the second node to reserve guard symbols when switching and when the second unit of the first node transmits the SR. If the second unit of the first node does not transmit the SR, the second node is requested not to reserve guard symbols. For another example, if the first element set includes the Channel-state information RS (CSI-RS), the request information can be used to request the second node to reserve guard symbols when switching and when the second unit of the first node transmits the periodic CSI-RS. If the second unit of the first node does not transmit the periodic CSI-RS, the second node is requested not to reserve guard symbols. Thus, it is clear under what circumstances guard symbols need to be reserved.

[0050] In this embodiment, the first element set can be an empty set. The first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits an empty set, that is, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits any signal or channel. Similarly, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits an empty set, that is, the first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits any signal or channel.

[0051] In one embodiment, the first set of elements can be determined by predefined (e.g., protocol predefined or agreed upon between the first node and the second node), signaling indication, or a combination of predefined and signaling interaction. Among them, the signaling includes at least one of high-layer signaling, physical-layer signaling, and Media Access Control Control Element (MAC CE) signaling.

[0052] In this embodiment, the first node requests the second node to reserve or not reserve guard symbols at the handover for the case of transmitting elements in the first set of elements, so as to clarify the reservation situation of the guard symbols, improve the certainty and reliability of symbol reservation. On this basis, the first node can implement an accurate handover operation between the first unit and the second unit.

[0053] In one embodiment, the handover includes: the handover between the operations of the first unit of the first node and the operations of the second unit of the first node; or, the handover between the operations of the second unit on the first attribute resource and the operations of the second unit on the second attribute resource; or, the handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit.

[0054] In this embodiment, the handover can refer to the handover between the operations of the first unit and the operations of the second unit, or the handover between the operations of the second unit on different attribute resources, or the handover between different attribute resources of the second unit.

[0055] In one embodiment, the first attribute resource includes at least one of the following: Not Available (NA) resource, soft resource that is Not Indicated Available (NIA), time unit where the NA resource is located, time unit where the NIA soft resource is located; the second attribute resource includes at least one of the following: resource occupied by an element in the first set of elements, NA resource or NIA soft resource occupied by an element in the first set of elements, time unit where the resource occupied by an element in the first set of elements is located, time unit where the NA resource or NIA soft resource occupied by an element in the first set of elements is located.

[0056] Figure 2 Schematic diagram for the handover from the operation of the first unit of the first node to the operation of the second unit provided for one embodiment. As Figure 2As shown, the second node schedules the first node to perform a transmission or reception operation in time unit n, and the second unit of the first node performs a transmission or reception operation on the elements in the first element set in time unit n+1. The first node may request the second node to reserve guard symbols at the handover, specifically, before switching to the operation on the elements in the first element set by the second unit, or at the handover position of the operation on the elements in the first element set by the second unit. The second node does not schedule a number of OFDM symbols of the first unit corresponding to the first node at time unit n+1 (as shown in the grid part in Figure 2 ).

[0057] Figure 3 FIG. is a schematic diagram of the operation handover from the second unit to the first unit of the first node provided for an embodiment. As shown in Figure 3 The second unit of the first node performs a transmission or reception operation on the elements in the first element set in time unit n, and the second node schedules the first unit of the first node to perform a transmission or reception operation in time unit n+1. The first node may request the second node to reserve guard symbols at the handover, specifically, at the handover position at the end of the operation on the elements in the first element set by the second unit, or at the handover position of the operation on the elements in the first element set by the second unit. The second node does not schedule a number of OFDM symbols of time unit n+1 of the first unit corresponding to the first node (as shown in the grid part in Figure 3 ).

[0058] Table 1 Handover types between the operations of the first unit and the second unit of the first node

[0059]

[0060] Table 1 shows the handover types between the operations of the first unit and the second unit of the first node. As shown in Table 1, there are a total of 8 cases of handover types for different transmission or reception operations. Figure 2 and Figure 3 respectively correspond to different handover types. As shown in Figure 2 , if the first time unit corresponds to the transmission operation of the first unit of the first node and the second time unit corresponds to the transmission operation of the second unit of the first node, then the direction combination shown in Figure 2 corresponds to the handover type numbered 3 in Table 1. As shown in Figure 3 , if the first time unit corresponds to the transmission operation of the second unit of the first node and the second time unit corresponds to the transmission operation of the first unit of the first node, then the direction shown in Figure 3 corresponds to the handover type numbered 7 in Table 1.

[0061] In one embodiment, the first set of elements is an empty set, or the first set of elements includes one of the following: a first set; a second set, where the second set is a subset of the first set; a third set, where the third set is one of the sets in a set group; a set composed of the elements in the first set except for the elements in the second set; a set composed of the elements in the set group except for the elements in the third set.

[0062] It should be noted that in this embodiment, the first set of elements, the first set, the second set, the third set, and each set in the set group are all sets composed of signals and / or channels transmitted by the second unit of the first node; if each set is not an empty set, the elements therein include signals and / or channels; transmitting the elements in the first set of elements includes sending or receiving the elements in the first set of elements.

[0063] For example, the first set of elements is an empty set. In this case, the first node requests the second node to reserve guard symbols at the handover when the second unit of the first node transmits an empty set, that is, at the handover, regardless of any signals or channels transmitted by the second unit of the first node, the first node requests the second node not to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols at the handover when the second unit of the first node transmits an empty set, that is, at the handover, regardless of any signals or channels transmitted by the second unit of the first node, the first node requests the second node to reserve guard symbols.

[0064] For example, the first set of elements is the first set. In this case, the first node requests the second node to reserve guard symbols at the handover when the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, when the second unit of the first node transmits signals and / or channels in the first set, the first node requests the second node to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols at the handover when the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, when the second unit of the first node transmits signals and / or channels in the first set, the first node requests the second node not to reserve guard symbols.

[0065] In one embodiment, the first set is an empty set (this case is the same as the case where the first set of elements is an empty set), or the first set includes at least one of the following: periodic channel state information reference signal (Channel State Information Reference Signal, CSI-RS), SSB, random access channel (Random Access Channel, RACH), scheduling request (Scheduling Request, SR), PDCCH corresponding to a type 0 search space.

[0066] In one embodiment, the PDCCH corresponding to the type 0 search space may be the PDCCH corresponding to the type 0 search space defined by the Master Indication Block (MIB).

[0067] For example, the first element set is the second set, and the second set is a subset of the first set. This situation can be understood as further selecting some signals and / or channels from a first set to form the second set, which is used as the basis for requesting the second node to reserve or not reserve symbols. In this case, the first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first element set, that is, when switching and when the second unit of the first node transmits the signals and / or channels in the second set, the first node requests the second node to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first element set, that is, when switching and when the second unit of the first node transmits the signals and / or channels in the second set, the first node requests the second node not to reserve guard symbols.

[0068] For example, the first element set is the third set, and the third set is one of the sets in the set group. This situation can be understood as further selecting a set from a set group to form the third set, which is used as the basis for requesting the second node to reserve or not reserve symbols. In this case, the first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first element set, that is, when switching and when the second unit of the first node transmits the signals and / or channels in the third set, the first node requests the second node to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first element set, that is, when switching and when the second unit of the first node transmits the signals and / or channels in the third set, the first node requests the second node not to reserve guard symbols.

[0069] For example, the first set of elements is a set composed of the elements remaining in the first set except for the elements in the second set. This situation can be understood as a set composed of the elements remaining after excluding the elements belonging to the second set from the first set, which is used as the basis for requesting the second node to reserve or not reserve symbols. In this case, the first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first set of elements, that is, when switching, when the second unit of the first node transmits signals and / or channels other than the elements in the second set in the first set, the first node requests the second node to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first set of elements, that is, when switching, when the second unit of the first node transmits signals and / or channels other than the elements in the second set in the first set, the first node requests the second node not to reserve guard symbols.

[0070] For example, the first set of elements is a set composed of the elements remaining in the set group except for the elements in the third set. This situation can be understood as a set composed of the elements remaining after excluding the elements in the third set from the set group, which is used as the basis for requesting the second node to reserve or not reserve symbols. In this case, the first node requests the second node to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first set of elements, that is, when switching, when the second unit of the first node transmits signals and / or channels other than the elements in the third set in the set group, the first node requests the second node to reserve guard symbols; or, the first node requests the second node not to reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first set of elements, that is, when switching, when the second unit of the first node transmits signals and / or channels other than the elements in the third set in the set group, the first node requests the second node not to reserve guard symbols.

[0071] In one embodiment, the set group includes at least one set, and each set corresponds to a number; each set is an empty set or includes at least one of the following elements: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0072] In one embodiment, the PDCCH corresponding to the type 0 search space may also be the PDCCH corresponding to the type 0 search space defined by the MIB.

[0073] Taking the first set of elements as a set composed of the elements other than the elements in the third set in the set group as an example, the set group may include one or more sets. The sets with numbers N1, N2, N3, and N4 in the set group are listed below:

[0074] The set numbered N1 includes the following elements: SSB, RACH, PDCCH in the Type 0 search space;

[0075] The set numbered N2 includes the following elements: SSB, RACH, PDCCH in the Type 0 search space, periodic CSI-RS;

[0076] The set numbered N3 includes the following elements: periodic CSI-RS, SR;

[0077] The set numbered N4 includes the following elements: SSB, RACH, PDCCH in the Type 0 search space, periodic CSI-RS, SR.

[0078] If the third set is the set corresponding to the number N3 and the third set includes periodic CSI-RS and SR, then the first element set includes the set composed of the elements in all the elements included in the set group except the elements of the third set, that is, the first element set includes SSB, RACH, and PDCCH in the Type 0 search space.

[0079] It should be noted that there may also be an empty set in the set group. If the third set is the empty set in the set group, then the first element set substantially includes all the elements in the set group.

[0080] In one embodiment, the first set, the second set, the third set, and the set group can be predefined respectively, or can be determined according to the first signaling. The first signaling includes at least one of high-layer signaling, physical-layer signaling, and MAC-layer signaling.

[0081] In one embodiment, the first set, the second set, and the third set belong to the candidate first set, the candidate second set, and the candidate third set respectively; the candidate first set, the candidate second set, and the candidate third set can be predefined respectively (for example, predefined by the protocol, or agreed upon by the first node and the second node), or can be determined through the second signaling. In addition, the first set, the second set, and the third set can be determined from the candidate first set, the candidate second set, and the candidate third set respectively according to the third signaling. For example, one or more of the candidate first set, the candidate second set, and the candidate third set are determined according to the second signaling, and then the corresponding first set, second set, or third set is determined from the candidate sets according to the third signaling. Among them, the second signaling includes at least one of high-layer signaling, physical-layer signaling, and MAC-layer signaling; the third signaling includes at least one of high-layer signaling, physical-layer signaling, and MAC-layer signaling.

[0082] It should be noted that the element division of the above first set, second set, third set, and set group is only an exemplary description. In some embodiments, other signals and / or channels may also be added based on the above signals and / or channels, such as channels corresponding to low-latency services, channels corresponding to high-reliability services, channels corresponding to low-latency and high-reliability services, channels corresponding to high-priority services, etc.

[0083] In one embodiment, the request information is sent through a Media Access Control Control Unit (MAC CE) or high-layer signaling. The high-layer signaling can be Radio Resource Control (RRC) signaling or F1 Application Protocol (F1-AP) signaling.

[0084] Figure 4 A schematic diagram of sending request information through MAC CE provided for an embodiment. As Figure 4 shown, the first node requests the second node to reserve or not reserve guard symbols for the case of transmitting the first element set through MAC CE. The request information may also carry subcarrier spacing, the number of guard symbols corresponding to 8 handover types, and several reserved bits, etc. Figure 4 Among them, each field of NmbGS1 to NmbGS8 corresponds to the number of reserved guard symbols corresponding to one handover type in Table 1.

[0085] Figure 5 A schematic diagram of requesting to reserve or not reserve guard symbols through MAC CE provided for an embodiment. As Figure 5 shown, a reserved bit (denoted as sigChNotify) of MAC CE is used as an indication field. This indication field occupies one bit and can represent two states, denoted as state 1 and state 2 respectively. Among them, state 1 and state 2 are distinguishable from each other. For example, when state 1 is 1, state 2 is 0; or when state 1 is 0, state 2 is 1.

[0086] The first node sends a MAC CE containing an indication field to the second node. Different states of the indication field indicate whether to request the second node to reserve guard symbols at handover when the first node's second unit transmits elements in the first element set. For example, when the indication field is in state 1, it means that at handover, when the first node's second unit transmits or receives elements in the first element set, the first node requests the second node to reserve guard symbols; when the indication field is in state 2, it means that at handover, when the first node's second unit transmits or receives elements in the first element set, the first node does not request the second node to reserve guard symbols. It should be noted that the first element set can be an empty set or can be related to at least one of the first set, the second set, the third set, and the set group.

[0087] In some embodiments, the indication field can also occupy two bits. The two bits have 4 values: 00, 01, 10, and 11. State 1 and state 2 correspond to two of these values, and the remaining two values can be reserved. The indication field can also be N bits, with 2 N values. One or more specific values of the 2 N values can be used to indicate whether the first node requests the second node to reserve guard symbols at handover when the first node's second unit transmits or receives elements in the first element set, and the remaining values can be reserved or indicate other states.

[0088] In one embodiment, the indication field in the MAC CE can also be one or more reserved bits in the MAC CE for notifying the requested number of reserved guard symbols, or one or more reserved bits in other existing MAC CEs, or a MAC CE is introduced, and one or more bits of this MAC CE are used as the indication field.

[0089] In some embodiments, the indication field can also be used to indicate whether the first node requests to know the second node's known information about the first element set. That is, the first node sends a MAC CE containing the indication field to the second node to query the second node's knowledge of the first element set. For example, when the indication field is in state 1, it means that the first node requests to query the second node's known information about the first element set; when the indication field is in state 2, it means that the first node does not query or does not care about the second node's known information about the first element set.

[0090] In some embodiments, the second node can also Figure 5 notify the first node, through the MAC CE shown, under what circumstances it will reserve or not reserve guard symbols.

[0091] In one embodiment, the indication field can also be used to represent the first set of elements. For example, when the indication field is in state 1, it means that the first set of elements includes the set numbered N1; when the indication field is in state 2, it means that the first set of elements includes the set numbered N2; when the indication field is in state 3, it means that the first set of elements includes elements in the set group except the set numbered N3, etc. Based on this, the first node can request the second node to reserve or not reserve guard symbols for the case of transmitting the first set of elements.

[0092] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node; the first unit is the MT of the IAB node, and the second unit is the DU of the IAB node. Among them, the parent node of the first node can be an eNB site of LTE, an IAB node, or a gNB of New Radio (NR).

[0093] In the embodiments of the present application, a symbol reservation method is further provided. The second node notifies the first node to reserve or not reserve guard symbols for the transmission of elements in the first set of elements at the handover, so as to clarify the reservation situation of the guard symbols and improve the certainty and reliability of symbol reservation. Based on this, the first node can implement accurate handover operations.

[0094] Figure 6 A flowchart of a symbol reservation method provided for another embodiment. This method can be applied to the second node. It should be noted that the operation of the second node sending indication information in this embodiment and the operation of the first node sending request information in the above embodiment belong to the same concept. Technical details not described in detail in this embodiment can be referred to any of the above embodiments.

[0095] As Figure 6 shown, the method provided in this embodiment includes step 210 and step 220.

[0096] In step 210, the first set of elements is determined.

[0097] In step 220, indication information is sent, and the indication information is used to notify the first node that when the elements in the first set of elements are transmitted at the handover and in the second unit of the first node, the second node reserves or does not reserve guard symbols.

[0098] In this embodiment, the second node notifies the first node that when the elements in the first set of elements are transmitted at the handover and in the second unit of the first node, the second node reserves or does not reserve guard symbols. The meaning of reserving guard symbols is that the second node does not schedule the resources (one or several OFDM symbols) corresponding to the first unit of the first node.

[0099] In this embodiment, the first element set is used to indicate that the second node will execute the guard symbol reservation mechanism when a certain signal and / or a certain channel is transmitted at the first node. For example, if the first element set includes the PDCCH in the Type 0 search space, the indication information can be used to notify the first node that the second node reserves guard symbols when the PDCCH in the Type 0 search space is transmitted at the second unit of the first node at the handover, and if the PDCCH transmitted by the second unit of the first node is not the PDCCH in the Type 0 search space, the second node does not reserve guard symbols. For another example, if the first element set includes the SSB, the indication information can be used to notify the first node that the second node does not reserve guard symbols when the SSB is transmitted at the second unit of the first node at the handover. For another example, if the first element set includes the uplink scheduling request SR, the request information can be used to request the second node to reserve guard symbols when the SR is transmitted at the second unit of the first node at the handover, and if the SR transmitted by the second unit of the first node is not the SR, the second node is requested not to reserve guard symbols. For another example, if the first element set includes the periodic CSI-RS, the request information can be used to request the second node to reserve guard symbols when the periodic CSI-RS is transmitted at the second unit of the first node at the handover, and if the periodic CSI-RS transmitted by the second unit of the first node is not the periodic CSI-RS, the second node is requested not to reserve guard symbols. Thus, it can be clear under what circumstances guard symbols are reserved.

[0100] In one embodiment, the first element set can be determined by predefined (such as protocol predefined or agreed upon between the first node and the second node), signaling indication, or a combination of predefined and interactive signaling, where the signaling includes at least one of high-layer signaling, physical-layer signaling, and MAC-layer signaling.

[0101] In one embodiment, the handover includes: a handover between the operations of the first unit and the second unit of the first node; or, a handover between the operations of the second unit on the first attribute resource and the operations of the second unit on the second attribute resource; or, a handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit.

[0102] In one embodiment, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, time unit where the NA resource is located, time unit where the NIA soft resource is located; the second attribute resource includes at least one of the following: resource occupied by an element in the first element set, NA resource or NIA soft resource occupied by an element in the first element set, time unit where the resource occupied by an element in the first element set is located, time unit where the NA resource or NIA soft resource occupied by an element in the first element set is located.

[0103] In one embodiment, the first set of elements is an empty set, or the first set of elements includes one of the following: a first set; a second set, where the second set is a subset of the first set; a third set, where the third set is one of the sets in a set group; a set composed of the elements in the first set except those in the second set; a set composed of the elements in the set group except those in the third set.

[0104] It should be noted that in this embodiment, the first set of elements, the first set, the second set, the third set, and each set in the set group are all sets composed of signals and / or channels transmitted by the second unit of the first node; if each set is not an empty set, the elements therein include signals and / or channels; transmitting the elements in the first set of elements includes sending or receiving the elements in the first set of elements.

[0105] For example, the first set of elements is an empty set. In this case, the second node notifies the first node to reserve guard symbols when, at the handover, the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, no matter what signals and / or channels the second unit of the first node transmits, the second node does not reserve guard symbols; or, the second node notifies the first node not to reserve guard symbols when, at the handover, the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, no matter what signals and / or channels the second unit of the first node transmits, the second node reserves guard symbols.

[0106] For example, the first set of elements is the first set. In this case, the second node notifies the first node to reserve guard symbols when, at the handover, the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, when the second unit of the first node transmits the signals and / or channels in the first set, the second node reserves guard symbols; or, the second node notifies the first node not to reserve guard symbols when, at the handover, the second unit of the first node transmits the elements in the first set of elements, that is, at the handover, when the second unit of the first node transmits the signals and / or channels in the first set, the second node does not reserve guard symbols.

[0107] In one embodiment, the first set is an empty set (this case is the same as the case where the first set of elements is an empty set), or the first set includes at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to a type 0 search space.

[0108] In one embodiment, the PDCCH corresponding to the type 0 search space may also be the PDCCH corresponding to the type 0 search space defined by the MIB.

[0109] For example, the first set of elements includes a second set, and the second set is a subset of the first set. This situation can be understood as further selecting some signals and / or channels from a first set to form a second set, which is used as the basis for the second node to reserve or not reserve symbols. In this case, the second node notifies the first node to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels from the second set, the second node reserves guard symbols; or the second node notifies the first node not to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels from the second set, the second node does not reserve guard symbols.

[0110] For example, the first set of elements is a third set, and the third set is one of the sets in a set group. This situation can be understood as further selecting a set from a set group to form a third set, which is used as the basis for the second node to reserve or not reserve symbols. In this case, the second node notifies the first node to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels from the third set, the second node reserves guard symbols; or the second node notifies the first node not to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels from the third set, the second node does not reserve guard symbols.

[0111] For example, the first set of elements is a set composed of the remaining elements in the first set after removing the elements in the second set. This situation can be understood as using the remaining elements in the first set after removing the elements in the second set as the basis for the second node to reserve or not reserve symbols. In this case, the second node notifies the first node to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels in the first set other than the elements in the second set, the second node reserves guard symbols; or the second node notifies the first node not to reserve guard symbols when, at the handover point, the second unit of the first node transmits elements from the first set of elements, that is, when, at the handover point, the second unit of the first node transmits signals and / or channels in the first set other than the elements in the second set, the second node does not reserve guard symbols.

[0112] For example, the first set of elements is the set composed of the elements remaining in the set group except for the elements in the third set. This situation can be understood as using the elements remaining after removing the elements in the third set from the set group as the basis for the second node to reserve or not reserve symbols. In this case, the second node notifies the first node to reserve guard symbols when transmitting the elements in the first set of elements at the second unit of the first node at the handover, that is, at the handover, when the second unit of the first node transmits signals and / or channels other than the elements in the third set in the set group, the second node reserves guard symbols; or, the second node notifies the first node not to reserve guard symbols when transmitting the elements in the first set of elements at the second unit of the first node at the handover, that is, at the handover, when the second unit of the first node transmits signals and / or channels other than the elements in the third set in the set group, the second node does not reserve guard symbols.

[0113] In one embodiment, the set group includes at least one set, and each set corresponds to a number; each set is an empty set, or includes at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to search space of type 0.

[0114] In one embodiment, the first set, the second set, the third set, and the set group are respectively predefined or determined according to the first signaling.

[0115] In one embodiment, the first set, the second set, and the third set respectively belong to the candidate first set, the candidate second set, and the candidate third set; wherein, the candidate first set, the candidate second set, and the candidate third set are predefined or determined according to the second signaling; the first set, the second set, and the third set are respectively determined from the candidate first set, the candidate second set, and the candidate third set according to the third signaling.

[0116] In one embodiment, the indication information is sent through MAC CE or high-layer signaling. The high-layer signaling can be RRC signaling or F1-AP signaling.

[0117] See Figure 4 , the second node can indicate the first node through MAC CE to reserve or not reserve guard symbols for the case of transmitting the first set of elements, and the indication information can also carry subcarrier spacing, the number of guard symbols corresponding to 8 handover types, and several reserved bits, etc. Figure 4 In, each field of NmbGS1 to NmbGS8 corresponds to the number of reserved guard symbols corresponding to one handover type in Table 1.

[0118] See Figure 5, a reserved bit of the MAC CE (denoted as sigChNotify) is used as an indication field. This indication field occupies one bit and can represent two states, denoted as state 1 and state 2 respectively. State 1 and state 2 are distinguishable from each other. For example, when state 1 is 1, state 2 is 0; or when state 1 is 0, state 2 is 1.

[0119] The second node sends a MAC CE containing the indication field to the first node. Different states of this indication field represent whether the second node reserves guard symbols when switching and when the second unit of the first node transmits elements in the first element set. For example, when the indication field is in state 1, it means that the second node reserves guard symbols when switching and when transmitting or receiving operations of elements in the first element set by the second unit of the first node; when the indication field is in state 2, it means that the second node does not reserve guard symbols when switching and when transmitting or receiving operations of elements in the first element set by the second unit of the first node. It should be noted that the first element set can be an empty set or related to at least one of the first set, the second set, the third set, and the set group.

[0120] In some embodiments, this indication field can also occupy two bits. The two bits have 4 values: 00, 01, 10, and 11. State 1 and state 2 correspond to two of these values, and the remaining two values can be reserved. This indication field can also be N bits, with 2 N values, and one or more specific values of the 2 N values can be used to represent whether the second node reserves guard symbols when switching and when transmitting or receiving operations of elements in the first element set by the second unit of the first node, and the remaining values can be reserved or indicate other states.

[0121] In one embodiment, the indication field in the MAC CE can also be used to notify one or more reserved bits in the MAC CE that requests the number of reserved guard symbols, or one or more reserved bits in other existing MAC CEs, or introduce a MAC CE, and one or more bits of this MAC CE are used as the indication field.

[0122] In one embodiment, the indication field can also be used to represent the first element set. For example, when the indication field is in state 1, it means that the first element set is the set numbered N1; when the indication field is in state 2, it means that the first element set is the set numbered N2; when the indication field is in state 3, it means that the first element set includes elements other than the set numbered N3 in the set group, etc. On this basis, the second node notifies whether to reserve or not reserve guard symbols for the case where the second unit transmits the first element set at the switching point.

[0123] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node; the first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

[0124] In an embodiment of the present application, an inquiry method is further provided. The first node inquires the second node about the knowledge of the first element set, so as to clarify what signals and / or channels the second node will reserve guard symbols for, improving the certainty and reliability of symbol reservation. It should be noted that the first node inquiring the second node about the known information of the first element set in this embodiment and the operation of the first node requesting the second node to reserve guard symbols for the case of transmitting the first element set in the above embodiment belong to the same concept, both aiming to clarify under what circumstances guard symbols will be reserved, improving the certainty and reliability of the symbol reservation mechanism. Technical details not described in detail in this embodiment can be referred to any of the above embodiments.

[0125] Figure 7 It is a flowchart of an inquiry method provided for an embodiment, and this method can be applied to the first node. As Figure 7 shown, the method provided in this embodiment includes step 310 and step 320.

[0126] In step 310, the first element set is determined.

[0127] In step 320, inquiry information is sent, and the inquiry information is used to query the known information of the second node about the first element set, where the first element set is used for the second node to reserve or not reserve guard symbols when transmitting elements in the first element set at the handover and in the second unit of the first node.

[0128] In this embodiment, the first node inquires whether the second node knows the relevant configuration of the first element set. For example, the first node inquires whether the second node knows the configuration of some or all of the elements in the first element set corresponding to the second unit of the first node.

[0129] In some embodiments, the first node can also notify the second node through the inquiry information that the first node does not care about the known information of the second node about the first element set.

[0130] In one embodiment, the first element set is an empty set, or the first element set is one of the following: the first set; the second set, where the second set is a subset of the first set; the third set, where the third set is one of the sets in the set group; the set composed of the remaining elements in the first set except the elements in the second set; the set composed of the remaining elements in the set group except the elements in the third set.

[0131] For example, the first node uses high-layer signaling to ask the second node whether it knows the relevant configuration of the third set numbered Ni in the set group. Here, the number of numbers is greater than or equal to the number of sets in the set group. For example, if the set group includes 4 sets, the value of Ni can provide at least 4 numbers to index different sets in the set group. The high-layer signaling can be RRC signaling or F1-AP signaling.

[0132] In one embodiment, the first set of elements is signals and / or channels, including at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to search space type 0.

[0133] It should be noted that in this embodiment, the first set of elements, the first set, the second set, the third set, and each set in the set group are all sets composed of signals and / or channels transmitted by the second unit of the first node; if each set is not an empty set, the elements therein include signals and / or channels; transmitting the elements in the first set of elements includes sending or receiving the elements in the first set of elements.

[0134] For example, the first set of elements is an empty set. In this case, the first node asks the second node about the known information of the first set of elements; or, the first node notifies the second node that it does not care about the known information of the second node about the first set of elements.

[0135] For example, the first set of elements is the first set. In this case, the first node asks the second node about the known information of the signals and / or channels in the first set; or, the first node notifies the second node that it does not care about the known information of the second node about the signals and / or channels in the first set.

[0136] In one embodiment, the first set is an empty set (this case is the same as the case where the first set of elements is an empty set), or the first set includes at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to search space type 0.

[0137] For example, the first set of elements is the second set, and the second set is a subset of the first set. This case can be understood as further selecting some signals and / or channels from a first set to form the second set as the basis for asking the second node. In this case, the first node asks the second node about the known information of the signals and / or channels in the second set; or, the first node notifies the second node that it does not care about the known information of the second node about the signals and / or channels in the second set.

[0138] For example, the first set of elements is the third set, and the third set is one of the sets in the set group. This situation can be understood as further selecting signals and / or channels in a set group to form the third set as the basis for querying the second node. In this case, the first node queries the second node about the known information of the signals and / or channels in the third set; or, the first node notifies the second node that it is not concerned about the known information of the signals and / or channels in the third set by the second node.

[0139] For example, the first set of elements is the set composed of the remaining signals and / or channels in the first set except the second set. This situation can be understood as forming a set of the remaining signals and / or channels after removing the second set from the first set as the basis for querying the second node. In this case, the first node queries the second node about the known information of the signals and / or channels in the first set except for the signals and / or channels in the second set; or, the first node notifies the second node that it is not concerned about the known information of the remaining signals and / or channels in the first set except the second set.

[0140] For example, the first set of elements is the set composed of the remaining signals and / or channels in the set group except the third set. This situation can be understood as forming a set of the remaining signals and / or channels after removing the third set from the set group as the basis for querying the second node. In this case, the first node queries the second node about the known information of the remaining signals and / or channels in the set group except the third set; or, the first node notifies the second node that it is not concerned about the known information of the remaining signals and / or channels in the set group except the third set.

[0141] See Figure 4 , the first node can query the second node about the known information of the first set of elements through MAC CE, and the indication information can also carry the subcarrier spacing, the number of guard symbols corresponding to 8 handover types, and several reserved bits, etc.

[0142] See Figure 5 , a reserved bit (denoted as sigChNotify) of MAC CE is used as an indication field. This indication field occupies one bit and can represent two states, denoted as state 1 and state 2 respectively. Among them, state 1 and state 2 are distinguishable from each other. For example, when state 1 is 1, state 2 is 0; or, when state 1 is 0, state 2 is 1.

[0143] The first node sends a MAC CE containing an indication field to the second node. Different states of the indication field indicate whether the first node wants to query the second node about the known information of the first element set. For example, when the indication field is in state 1, it means the first node queries the second node about the known information of the first element set; when the indication field is in state 2, it means the first node does not care about the known information of the first element set of the second node. It should be noted that the first element set can be an empty set, or it can be related to at least one of the first set, the second set, the third set, and the set group.

[0144] In some embodiments, the indication field can also occupy two bits. The two bits have 4 values: 00, 01, 10, and 11. State 1 and state 2 correspond to two of these values, and the remaining two values can be reserved. The indication field can also be N bits, with 2 N values, and one or more specific values of the 2 N values can be used to indicate whether the first node wants to query the known information of the first element set, and the remaining values can be reserved or indicate other states.

[0145] In one embodiment, the indication field in the MAC CE can also be used to notify one or more reserved bits in the MAC CE that requests to reserve the number of guard symbols, or one or more reserved bits in other existing MAC CEs, or introduce a MAC CE, and one or more bits of this MAC CE are used as the indication field.

[0146] In one embodiment, the indication field can also be used to represent the first element set. For example, when the indication field is in state 1, it means the first element set is the set numbered N1; when the indication field is in state 2, it means the first element set is the set numbered N2; when the indication field is in state 3, it means the first element set is the set numbered N3, etc. On this basis, the first node can determine the known information of the second node about the first element set.

[0147] In one embodiment, the handover includes: the handover between the operations of the first unit and the second unit of the first node; or, the handover between the operations of the second unit on the first attribute resource and the operations of the second unit on the second attribute resource; or, the handover between the first attribute resource and the second attribute resource of the second unit.

[0148] In one embodiment, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, time unit where the NA resource is located, time unit where the NIA soft resource is located; the second attribute resource includes at least one of the following: resource occupied by an element in the first element set, NA resource or NIA soft resource occupied by an element in the first element set, time unit where the resource occupied by an element in the first element set is located, time unit where the NA resource or NIA soft resource occupied by an element in the first element set is located.

[0149] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node; the first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

[0150] In one embodiment, the signals and / or channels included in the first element set are predefined or determined according to signaling. Among them, the signaling includes at least one of the first signaling, the second signaling, and the third signaling, and specifically may be high-layer signaling, physical-layer signaling, MAC-layer signaling, etc.

[0151] In the embodiments of the present application, a notification method is further provided. The second node notifies the first node of the known information about the first element set, so as to clarify what kind of elements the second node will reserve guard symbols for, and improve the certainty and reliability of symbol reservation. It should be noted that the operation of the second node notifying the first node of the known information about the first element set in this embodiment and the operation of the first node querying the second node about the known information about the first element set in the above embodiment belong to the same concept, both of which are to clarify under what circumstances guard symbols will be reserved and improve the certainty and reliability of the symbol reservation mechanism. Technical details not described in detail in this embodiment can be referred to any of the above embodiments.

[0152] Figure 8 A flowchart of a notification method provided for an embodiment is as Figure 8 shown. The method provided in this embodiment includes step 410 and step 420.

[0153] In step 410, the first element set is determined.

[0154] In step 420, a notification message is sent. The notification message is used to notify the first node of the known information of the second node about the first element set, where the first element set is used for the second node to reserve or not reserve guard symbols when transmitting elements in the first element set at the handover and in the second unit of the first node.

[0155] In this embodiment, the second node notifies the first node whether it knows the relevant configuration of the first element set. For example, the second node notifies the first node whether it knows the configuration of some or all of the elements in the first element set corresponding to the second unit of the first node.

[0156] In one embodiment, the first element set is an empty set, or the first element set is one of the following: the first set; the second set, where the second set is a subset of the first set; the third set, where the third set is one of the sets in a set group; the set composed of the remaining elements in the first set except the second set; the set composed of the remaining elements in the set group except the third set.

[0157] For example, the second node notifies the first node whether it knows the relevant configuration of the third set numbered Ni in the set group through high-layer signaling. Among them, the number of numbers is greater than or equal to the number of sets in the first set group. For example, if the set group includes 4 sets, the value of Ni can provide at least 4 numbers to index different sets in the first set group. The high-layer signaling can be RRC signaling or F1-AP signaling.

[0158] In one embodiment, the first element set is an empty set, or the first element set includes at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to search space of type 0.

[0159] It should be noted that in this embodiment, the first element set, the first set, the second set, the third set, and each set in the set group are all sets composed of signals and / or channels transmitted by the second unit of the first node; if each set is not an empty set, the elements therein include signals and / or channels; transmitting the elements in the first element set includes sending or receiving the elements in the first element set.

[0160] For example, the first element set is an empty set. In this case, the second node notifies the first node of the known information about the first element set.

[0161] For example, the first element set is the first set. In this case, the second node notifies the first node of the known information about the signals and / or channels in the first set.

[0162] In one embodiment, the first set is an empty set (this case is the same as the case where the first element set is an empty set), or the first set includes at least one of the following: periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to search space of type 0.

[0163] For example, the first set of elements is the second set, and the second set is a subset of the first set. This situation can be understood as further selecting some signals and / or channels from a first set to form the second set. In this case, the second node notifies the first node of the known information about the signals and / or channels in the second set.

[0164] For example, the first set of elements is the third set, and the third set is one of the sets in a set group. This situation can be understood as further selecting a set from a set group to form the third set. In this case, the second node notifies the first node of the known information about the signals and / or channels in the third set.

[0165] For example, the first set of elements is the set composed of the remaining signals and / or channels in the first set except the second set. This situation can be understood as the signals and / or channels remaining after removing the elements in the second set from the first set. In this case, the second node notifies the first node of the known information about the remaining signals and / or channels in the first set except the second set.

[0166] For example, the first set of elements is the set composed of the remaining signals and / or channels in the set group except the third set. This situation can be understood as the signals and / or channels remaining after removing the third set from the set group. In this case, the second node notifies the first node of the known information about the remaining signals and / or channels in the set group except the third set.

[0167] In one embodiment, the notification information is sent through MAC CE or high-layer signaling. The high-layer signaling can be RRC signaling or F1-AP signaling.

[0168] See Figure 4 , the second node can notify the first node of the known information about the elements in the first set of elements through MAC CE, and the notification information can also carry the subcarrier spacing, the number of guard symbols corresponding to 8 handover types, and several reserved bits, etc.

[0169] See Figure 5 , a reserved bit of the MAC CE (denoted as sigChNotify) is used as an indication field. This indication field occupies one bit and can represent two states, denoted as state 1 and state 2 respectively. Among them, state 1 and state 2 are distinguishable from each other. For example, when state 1 is 1, state 2 is 0; or when state 1 is 0, state 2 is 1.

[0170] The second node sends a MAC CE containing an indication field to the first node, and the indication field is used to notify the first node of the known information about the elements in the first element set. For example, when the indication field is in state 1, it means the second node notifies the known information about the elements in the first element set; when the indication field is in state 2, it means the second node does not know the first element set. It should be noted that the first element set can be an empty set, or can be related to at least one of the first set, the second set, the third set, and the set group.

[0171] In some embodiments, the indication field can also occupy two bits, and the two bits have 4 values: 00, 01, 10, and 11. State 1 and state 2 correspond to two of the values, and the remaining two values can be reserved. The indication field can also be N bits, and there are 2 N values, and one or more specific values among the 2 N values can be used to indicate whether the second node notifies or pays attention to the known information about the elements in the first element set, and the remaining values can be reserved or indicate other states.

[0172] In one embodiment, the indication field in the MAC CE can also adopt one or more reserved bits in the MAC CE used to notify the requested number of reserved protection symbols, or one or more reserved bits in other existing MAC CEs, or introduce a MAC CE, and one or more bits of this MAC CE are used as the indication field.

[0173] In one embodiment, the indication field can also be used to represent the first element set. For example, when the indication field is in state 1, it means the first element set includes the set numbered N1; when the indication field is in state 2, it means the first element set includes the set numbered N2; when the indication field is in state 3, it means the first element set includes the elements in the set group except the set numbered N3, etc. On this basis, the second node notifies whether to reserve or not reserve protection symbols for the case of transmitting the first element set.

[0174] In one embodiment, the handover includes:

[0175] The handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or,

[0176] The handover between the operation of the second unit on the first attribute resource and the operation of the second unit on the second attribute resource; or the handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit.

[0177] Wherein, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, the time unit where the NA resource is located, the time unit where the NIA soft resource is located;

[0178] The second attribute resources include at least one of the following: resources occupied by elements in the first element set, NA resources or NIA soft resources occupied by elements in the first element set, time units where the resources occupied by elements in the first element set are located, and time units where the NA resources or NIA soft resources occupied by elements in the first element set are located.

[0179] In one embodiment, the first node is an IAB node and the second node is the parent node of the first node;

[0180] The first unit is the MT of the IAB node and the second node is the DU of the IAB node.

[0181] In one embodiment, the elements included in the first element set are predefined or determined according to signaling. Among them, the signaling includes at least one of the first signaling, the second signaling, and the third signaling, and specifically may be high-layer signaling, physical-layer signaling, MAC-layer signaling, etc.

[0182] The embodiment of the present application also provides a symbol reservation device. Figure 9 It is a schematic structural diagram of a resource symbol reservation device provided for an embodiment. As Figure 9 shown, the symbol reservation device includes: an element determination module 11 and a request module 12.

[0183] The element determination module 11 is configured to determine the first element set;

[0184] The request module 12 is configured to send request information, and the request information is used to request to reserve or not reserve protection symbols when transmitting elements in the first element set at the second unit of the first node at the handover.

[0185] The symbol reservation device of this embodiment requests the second node to reserve or not reserve protection symbols for the transmission of elements in the first element set at the handover, thereby clarifying the reservation situation of the protection symbols, improving the certainty and reliability of symbol reservation, and on this basis, the first node can implement accurate handover operations.

[0186] In one embodiment, the handover includes:

[0187] The handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or,

[0188] The handover between the operation of the second unit on the first attribute resources and the operation of the second unit on the second attribute resources; or the handover between the first attribute resources corresponding to the second unit and the second attribute resources corresponding to the second unit.

[0189] In one embodiment, the first attribute resource includes at least one of the following: NA resource, soft resource of NIA, time unit where the NA resource is located, time unit where the NIA soft resource is located;

[0190] The second attribute resource includes at least one of the following: resource occupied by an element in the first element set, NA resource or NIA soft resource occupied by an element in the first element set, time unit where the resource occupied by an element in the first element set is located, time unit where the NA resource or NIA soft resource occupied by an element in the first element set is located.

[0191] In one embodiment, the first element set is an empty set, or the first element set is one of the following: the first set; the second set, where the second set is a subset of the first set; the third set, where the third set is a set in a set group; the set composed of the remaining elements in the first set except the second set; the set composed of the remaining elements in the set group except the third set.

[0192] In one embodiment, the first set is an empty set, or the first set includes at least one of the following:

[0193] Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0194] In one embodiment, the set group includes at least one set, and each set corresponds to a number;

[0195] Each set is an empty set, or includes at least one of the following elements:

[0196] Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0197] In one embodiment, the first set, the second set, the third set, and the set group are predefined respectively, or determined according to the first signaling.

[0198] In one embodiment, the first set, the second set, and the third set belong to the candidate first set, the candidate second set, and the candidate third set respectively;

[0199] Among them, the candidate first set, the candidate second set, and the candidate third set are predefined, or determined according to the second signaling;

[0200] The first set, the second set, and the third set are determined from the candidate first set, the candidate second set, and the candidate third set respectively according to the third signaling.

[0201] In one embodiment, the request information is sent through MAC CE or high-layer signaling.

[0202] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node;

[0203] The first unit is the MT of the IAB node, and the second unit is the DU of the IAB node.

[0204] The symbol reservation device proposed in this embodiment and the symbol reservation method applied to the first node proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the symbol reservation method applied to the first node.

[0205] Figure 10 It is a schematic structural diagram of a resource symbol reservation device provided for another embodiment. As Figure 10 shown, the symbol reservation device includes: an element determination module 21 and an indication module 22.

[0206] The element determination module 21 is configured to determine a first set of elements;

[0207] The indication module 22 is configured to indicate information for notifying the first node to reserve or not reserve a guard symbol at the handover and when the second unit of the first node transmits an element in the first set of elements.

[0208] The symbol reservation device of this embodiment, by notifying the first node to reserve or not reserve a guard symbol for the transmission of elements in the first set of elements at the handover, thereby clarifying the reservation situation of the guard symbol, improving the certainty and reliability of symbol reservation. On this basis, the first node can achieve timing alignment and accurate handover operations.

[0209] In one embodiment, the handover includes:

[0210] The handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or,

[0211] The handover between the operation of the second unit on the first attribute resource and the operation of the second unit on the second attribute resource; or the handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit.

[0212] In one embodiment, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, time unit where the NA resource is located, time unit where the NIA soft resource is located;

[0213] The second attribute resource includes at least one of the following: the resource occupied by the elements in the first element set, the NA resource or NIA soft resource occupied by the elements in the first element set, the time unit where the resource occupied by the elements in the first element set is located, and the time unit where the NA resource or NIA soft resource occupied by the elements in the first element set is located.

[0214] In one embodiment, the first element set is an empty set, or the first element set is one of the following: the first set; the second set, where the second set is a subset of the first set; the third set, where the third set is a set in a set group; the set composed of the remaining elements in the first set except the second set; the set composed of the remaining elements in the set group except the third set.

[0215] In one embodiment, the first set is an empty set, or the first set includes at least one of the following:

[0216] Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0217] In one embodiment, the set group includes at least one set, and each set corresponds to a number;

[0218] Each set is an empty set, or includes at least one of the following:

[0219] Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0220] In one embodiment, the first set, the second set, the third set, and the set group are respectively predefined or determined according to the first signaling.

[0221] In one embodiment, the first set, the second set, and the third set respectively belong to the candidate first set, the candidate second set, and the candidate third set;

[0222] Among them, the candidate first set, the candidate second set, and the candidate third set are predefined or determined according to the second signaling;

[0223] The first set, the second set, and the third set are respectively determined from the candidate first set, the candidate second set, and the candidate third set according to the third signaling.

[0224] In one embodiment, the indication information is sent through MAC CE or high-layer signaling.

[0225] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node; the first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

[0226] The symbol reservation device proposed in this embodiment and the symbol reservation method applied to the second node proposed in the above embodiment belong to the same inventive concept. For technical details not described in detail in this embodiment, reference can be made to any of the above embodiments, and this embodiment has the same beneficial effects as the symbol reservation method applied to the second node.

[0227] An embodiment of the present application also provides a query device. Figure 11 A structural schematic diagram of a query device provided for an embodiment. As Figure 11 shown, the symbol reservation device includes: an element determination module 31 and an inquiry module 32.

[0228] The element determination module 31 is configured to determine a first element set;

[0229] The inquiry module 32 is configured to send an inquiry message, and the inquiry message is used to query the known information of the second node about the first element set. Among them, the first element set is used to reserve or not reserve a protection symbol by the second node when transmitting elements in the first element set at the handover point and in the second unit of the first node.

[0230] The symbol reservation device of this embodiment clarifies what elements the second node will reserve protection symbols for by querying the known information of the second node about the first element set, improving the certainty and reliability of symbol reservation.

[0231] In one embodiment, the handover includes:

[0232] The handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or,

[0233] The handover between the operation of the second unit on the first attribute resource and the operation of the second unit on the second attribute resource; or the handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit.

[0234] In one embodiment, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, time unit where the NA resource is located, time unit where the NIA soft resource is located;

[0235] The second attribute resource includes at least one of the following: resource occupied by an element in the first element set, NA resource or NIA soft resource occupied by an element in the first element set, time unit where the resource occupied by an element in the first element set is located, time unit where the NA resource or NIA soft resource occupied by an element in the first element set is located.

[0236] In one embodiment, the first set of elements is an empty set, or the first set of elements is one of the following: the first set; the second set, where the second set is a subset of the first set; the third set, where the third set is one of the sets in the set group; the set composed of the remaining elements in the first set excluding the second set; the set composed of the remaining elements in the set group excluding the third set.

[0237] In one embodiment, the first set of elements is an empty set, or the first set of elements includes at least one of the following elements:

[0238] Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

[0239] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node;

[0240] The first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

[0241] In one embodiment, the elements included in the first set of elements are predefined or determined according to signaling.

[0242] The symbol reservation device proposed in this embodiment and the symbol reservation method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the symbol reservation method.

[0243] The embodiment of the present application also provides a notification device. Figure 12 It is a schematic structural diagram of a notification device provided for an embodiment. As Figure 12 shown, the symbol reservation device includes: an element determination module 41 and a notification module 42.

[0244] The element determination module 41 is configured to determine the first set of elements;

[0245] The notification module 42 is configured to send a notification message, where the notification message is used to notify the first node of the known information of the second node about the first set of elements. Among them, the first set of elements is used to determine whether the second node reserves or does not reserve guard symbols when transmitting the elements in the first set of elements at the second unit of the first node at the handover.

[0246] The symbol reservation device of this embodiment improves the certainty and reliability of symbol reservation by notifying the second node of the known information about the first set of elements, thereby clarifying what elements the second node will reserve guard symbols for.

[0247] In one embodiment, the first set of elements is an empty set, or the first set of elements includes at least one of a signal and a channel.

[0248] In one embodiment, the handover includes:

[0249] a handover between operations of a first unit of a first node and operations of a second unit of the first node; or,

[0250] a handover between operations of a second unit on a first attribute resource and operations of the second unit on a second attribute resource; or a handover between a first attribute resource corresponding to the second unit and a second attribute resource corresponding to the second unit.

[0251] In one embodiment, the first attribute resource includes at least one of the following: NA resource, NIA soft resource, time unit where the NA resource is located, time unit where the NIA soft resource is located;

[0252] The second attribute resource includes at least one of the following: resource occupied by an element in a first element set, NA resource or NIA soft resource occupied by an element in the first element set, time unit where the resource occupied by an element in the first element set is located, time unit where the NA resource or NIA soft resource occupied by an element in the first element set is located.

[0253] In one embodiment, the first element set is an empty set, or the first element set is one of the following: a first set; a second set, where the second set is a subset of the first set; a third set, where the third set is a set in a set group; a set composed of elements remaining in the first set except the second set; a set composed of elements remaining in the set group except the third set.

[0254] In one embodiment, the first element set is an empty set, or the first element set includes at least one of the following:

[0255] periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to a type 0 search space.

[0256] In one embodiment, the first node is an IAB node, and the second node is the parent node of the first node;

[0257] The first unit is the MT of the IAB node, and the second unit is the DU of the IAB node.

[0258] In one embodiment, the elements included in the first element set are predefined or determined according to signaling.

[0259] The symbol reservation device proposed in this embodiment and the symbol reservation method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the symbol reservation method.

[0260] The embodiment of the present application further provides a first node. The above symbol reservation method applied to the first node can be executed by a symbol reservation device, which can be implemented in a software and / or hardware manner and integrated in the first node. The above query method can be executed by a query device, which can be implemented in a software and / or hardware manner and integrated in the first node. The first node is an IAB node.

[0261] Figure 13 FIG. is a schematic hardware structure diagram of a first node provided by an embodiment. As Figure 13 shown, a first node provided by this embodiment includes: a processor 510 and a storage device 520. The processor in the first node can be one or more. Figure 13 Taking one processor 510 as an example, the processor 510 and the storage device 520 in the device can be connected through a bus or other means. Figure 13 Taking the connection through the bus as an example.

[0262] The one or more programs are executed by the one or more processors 510, so that the one or more processors implement the symbol reservation method or the query method applied to the first node described in any of the above embodiments.

[0263] The storage device 520 in the first node, as a computer-readable storage medium, can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the symbol reservation method applied to the first node in the embodiment of the present invention (for example, the modules in the symbol reservation device shown in the appendix Figure 9 include: an element determination module 11 and a request module 12). The processor 510 executes various functional applications and data processing of the first node by running the software programs, instructions, and modules stored in the storage device 520, that is, implements the symbol reservation method in the above method embodiment.

[0264] The storage device 520 mainly includes a storage program area and a storage data area. Among them, the storage program area can store an operating system and application programs required for at least one function; the storage data area can store data created according to the use of the device (such as the first element set, request information, etc. in the above embodiment). In addition, the storage device 520 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the storage device 520 can further include a memory remotely set relative to the processor 510, and these remote memories can be connected to the first node through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0265] Moreover, when one or more programs included in the first node are executed by the one or more processors 510, the following operations are implemented: determining a first set of elements; sending request information for requesting reservation or non-reservation of guard symbols in the case of transmitting elements in the first set of elements at the handover and in the second unit of the first node.

[0266] The following operations can also be implemented: determining a first set of elements; sending query information for querying the known information of the second node about the first set of elements, where the first set of elements is used for the second node to reserve or not reserve guard symbols in the case of transmitting elements in the first set of elements at the handover and in the second unit of the first node.

[0267] The first node proposed in this embodiment and the symbol reservation method or query method applied to the first node proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to in any of the above embodiments, and this embodiment has the same beneficial effects as executing the symbol reservation method or query method.

[0268] This application embodiment also provides a second node. The symbol reservation method applied to the second node can be executed by a symbol reservation device, which can be implemented in a software and / or hardware manner and integrated in the second node. The above notification method can be executed by a notification device, which can be implemented in a software and / or hardware manner and integrated in the second node. The second node is the parent node of the IAB node.

[0269] Figure 14 A schematic diagram of the hardware structure of a second node provided for an embodiment. As Figure 14 shown, a second node provided in this embodiment includes: a processor 610 and a storage device 620. The processor in this second node can be one or more, Figure 14 taking one processor 610 as an example, the processor 610 and the storage device 620 in the device can be connected through a bus or other means, Figure 14 taking connection through a bus as an example.

[0270] When the one or more programs are executed by the one or more processors 610, the one or more processors implement the symbol reservation method or notification method applied to the second node described in any of the above embodiments.

[0271] The storage device 620 in the second node, as a computer-readable storage medium, can be used to store one or more programs, which can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the symbol reservation method applied to the second node in the embodiments of the present invention (for example, the modules in the symbol reservation device shown in Figure 10 the attached figure, including: an element determination module 21 and an indication module 22). By running the software programs, instructions, and modules stored in the storage device 620, the processor 610 executes various functional applications and data processing of the second node, that is, implements the symbol reservation method or notification method applied to the second node in the above method embodiments.

[0272] The storage device 620 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the device (such as the first element set, indication information, etc. in the above embodiments). In addition, the storage device 620 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the storage device 620 can further include a memory remotely set relative to the processor 610, and these remote memories can be connected to the second node through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0273] Moreover, when one or more programs included in the second node are executed by the one or more processors 610, the following operations are implemented: determining a first element set; sending indication information, where the indication information is used to notify the first node that when switching and when the second unit of the first node transmits the elements in the first element set, the second node reserves or does not reserve guard symbols.

[0274] It can also implement the following operations: determining a first element set; sending notification information, where the notification information is used to notify the first node of the known information of the second node about the first element set, where the first element set is used to determine whether the second node reserves or does not reserve guard symbols when switching and when the second unit of the first node transmits the elements in the first element set.

[0275] The second node proposed in this embodiment and the symbol reservation method or notification method applied to the second node proposed in the above embodiment belong to the same inventive concept. For technical details not described in detail in this embodiment, reference can be made to any of the above embodiments, and this embodiment has the same beneficial effects as implementing the symbol reservation method or notification method applied to the second node.

[0276] An embodiment of the present application further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a symbol reservation method, a query method, or a notification method when executed by a computer processor.

[0277] From the above description of the embodiments, those skilled in the art can understand that the present application can be implemented by means of software and general hardware, or can also be implemented by hardware. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk, or an optical disc of a computer, etc., including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method described in any embodiment of the present application.

[0278] The above is only an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application.

[0279] Any block diagram of a logical process in the drawings of the present application may represent a program step, or may represent interconnected logical circuits, modules, and functions, or may represent a combination of program steps and logical circuits, modules, and functions. The computer program can be stored on a memory. The memory can have any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile disc DVD or CD disc), etc. The computer-readable medium can include a non-transitory storage medium. The data processor can be any type suitable for the local technical environment, such as, but not limited to, a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture.

[0280] Through exemplary and non-limiting examples, a detailed description of the exemplary embodiments of the present application has been provided above. However, considering the accompanying drawings and the claims, various modifications and adjustments to the above embodiments are obvious to those skilled in the art, but do not deviate from the scope of the present invention. Therefore, the proper scope of the present invention will be determined according to the claims.

Claims

1. A symbol reservation method, applied to a first node, characterized in that, Including: Determine a first set of elements; Send request information for requesting reservation or non - reservation of guard symbols in the case where elements in the first set are transmitted by a second unit of a first node at a handover; wherein, the first set of elements is used to represent that the first node requests the second node to execute a guard symbol reservation mechanism when transmitting a signal and / or a channel; Wherein, the first set of elements is an empty set, or the first set of elements includes one of the following: A first set; A second set, where the second set is a subset of the first set; A third set, where the third set is one of the sets in a set group; A set composed of elements in the first set except those in the second set; A set composed of elements in the set group except those in the third set; Wherein, the handover includes: A handover between operations of a first unit of the first node and operations of a second unit of the first node; or, A handover between operations of the second unit on a first - attribute resource and operations of the second unit on a second - attribute resource; or, A handover between a first - attribute resource corresponding to the second unit and a second - attribute resource corresponding to the second unit; Wherein, the first - attribute resource includes at least one of the following: unavailable NA resource, soft resource not indicated as available NIA, time unit where the NA resource is located, time unit where the NIA soft resource is located; The second - attribute resource includes at least one of the following: resources occupied by elements in the first set of elements, NA resources or NIA soft resources occupied by elements in the first set of elements, time unit where resources occupied by elements in the first set of elements are located, time unit where NA resources or NIA soft resources occupied by elements in the first set of elements are located.

2. The method according to claim 1, wherein The first set is an empty set, or the first set includes at least one of the following: Periodic channel state information reference signal CSI - RS, synchronization signal and physical broadcast channel block SSB, random access channel RACH, scheduling request SR, physical downlink control channel PDCCH corresponding to a type 0 search space.

3. The method according to claim 1, wherein The set group includes at least one set, and each set corresponds to a number; Each set is an empty set, or includes at least one of the following elements: Periodic CSI - RS, SSB, RACH, SR, PDCCH corresponding to a type 0 search space.

4. The method according to claim 2 or 3, characterized in that, The PDCCH corresponding to the type 0 search space is the PDCCH corresponding to the type 0 search space configured in the master information block MIB.

5. The method according to claim 1, wherein The first set is predefined or determined according to a first signaling; The second set is predefined or determined according to a first signaling; The third set is predefined or determined according to a first signaling; The set group is predefined or determined according to a first signaling.

6. The method according to claim 1, wherein The first set, the second set, and the third set respectively belong to a candidate first set, a candidate second set, and a candidate third set; Wherein, the candidate first set, the candidate second set, and the candidate third set are predefined or determined according to a second signaling; The first set, the second set, and the third set are determined from the candidate first set, the candidate second set, and the candidate third set respectively according to a third signaling.

7. The method according to claim 1, characterized in that, The request information is sent through a Medium Access Control Control Element (MAC CE) or a high-layer signaling.

8. The method according to claim 1, characterized in that The first node is an Integrated Access and Backhaul (IAB) node, and the second node is the parent node of the first node; The first unit is a Mobile Terminal (MT) of the IAB node, and the second unit is a Distributed Unit (DU) of the IAB node.

9. A symbol reservation method, applied to a second node, characterized in that It includes: Determine a first element set; Send indication information, which is used to notify the first node that when switching and when the second unit of the first node transmits elements in the first element set, the second node reserves or does not reserve guard symbols; wherein, the first element set is used to represent that when the first node transmits a signal and / or a channel, it requests the second node to execute a guard symbol reservation mechanism; Wherein, the first element set is an empty set, or the first element set includes one of the following: A first set; A second set, where the second set is a subset of the first set; A third set, where the third set is one set in a set group; A set composed of elements in the first set except for the elements in the second set; A set composed of elements in the set group except for the elements in the third set; Wherein, the handover includes: A handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or, A handover between the operation of the second unit on a first attribute resource and the operation of the second unit on a second attribute resource; or, A handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit; Wherein, the first attribute resource includes at least one of the following: Not Available (NA) resource, Soft resource Not Indicated as Available (NIA), time unit where the NA resource is located, time unit where the NIA soft resource is located; The second attribute resource includes at least one of the following: resources occupied by elements in the first element set, NA resources or NIA soft resources occupied by elements in the first element set, time unit where the resources occupied by elements in the first element set are located, time unit where the NA resources or NIA soft resources occupied by elements in the first element set are located.

10. The method according to claim 9, wherein The first set is an empty set, or the first set includes at least one of the following: Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to a type 0 search space.

11. The method according to claim 9, characterized in that, The set group includes at least one set, and each set corresponds to a number; Each set is an empty set, or includes at least one of the following: Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to a type 0 search space.

12. The method according to claim 10 or 11, characterized in that The PDCCH corresponding to the type 0 search space is the PDCCH corresponding to the type 0 search space configured in the Master Information Block (MIB).

13. The method according to claim 9, wherein: the first set is predefined or determined according to a first signaling; the second set is predefined or determined according to a first signaling; the third set is predefined or determined according to a first signaling; the set group is predefined or determined according to a first signaling.

14. The method according to claim 9, wherein The first set, the second set, and the third set respectively belong to a candidate first set, a candidate second set, and a candidate third set; wherein, the candidate first set, the candidate second set, and the candidate third set are predefined or determined according to a second signaling; the first set, the second set, and the third set are respectively determined from the candidate first set, the candidate second set, and the candidate third set according to a third signaling.

15. The method according to claim 9, wherein The indication information is sent through a MAC CE or a high-layer signaling; the first node is an IAB node, and the second node is the parent node of the first node; the first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

16. A query method, applied to a first node, characterized in that, It includes: determining a first element set; sending an inquiry message, where the inquiry message is used to query the known information of the second node about the first element set, and wherein, the first element set is used for the second node to reserve or not reserve a guard symbol when transmitting elements in the first element set at a handover location and in a second unit of the first node; wherein, the first element set is further used to indicate that when the first node transmits a signal and / or a channel, the second node is requested to execute a guard symbol reservation mechanism; wherein, the first element set is an empty set, or the first element set includes one of the following: a first set; a second set, where the second set is a subset of the first set; a third set, where the third set is a set in the set group; a set composed of elements in the first set except for the elements in the second set; a set composed of elements in the set group except for the elements in the third set; wherein, the handover includes: a handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or, a handover between the operation of the second unit on a first attribute resource and the operation of the second unit on a second attribute resource; or, a handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit; wherein, the first attribute resource includes at least one of the following: an unavailable NA resource, a soft resource not indicated as available NIA, a time unit where the NA resource is located, a time unit where the NIA soft resource is located; the second attribute resource includes at least one of the following: a resource occupied by an element in the first element set, an NA resource or an NIA soft resource occupied by an element in the first element set, a time unit where a resource occupied by an element in the first element set is located, a time unit where an NA resource or an NIA soft resource occupied by an element in the first element set is located.

17. The method according to claim 16, characterized in that, The first element set is an empty set, or the first element set includes at least one of the following elements: Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

18. The method according to claim 17, wherein The PDCCH corresponding to the type 0 search space is the PDCCH corresponding to the type 0 search space configured in the MIB.

19. The method according to claim 16, wherein The first node is an IAB node, and the second node is the parent node of the first node; The first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

20. The method according to claim 16, wherein The elements included in the first element set are predefined or determined according to signaling.

21. A notification method, applied to a second node, characterized in that, Include: Determine the first element set; Send a notification message, which is used to notify the first node of the second node's known information about the first element set. Among them, when the first element set is used to transmit elements in the first element set at the second unit of the first node at the handover, the second node reserves or does not reserve guard symbols; among them, the first element set is also used to indicate that when the first node transmits signals and / or channels, it requests the second node to execute the guard symbol reservation mechanism; Among them, the first element set is an empty set, or the first element set includes one of the following: The first set; The second set, and the second set is a subset of the first set; The third set, and the third set is one of the sets in the set group; The set composed of the elements in the first set except the elements in the second set; The set composed of the elements in the set group except the elements in the third set; Among them, the handover includes: The handover between the operation of the first unit of the first node and the operation of the second unit of the first node; or, The handover between the operation of the second unit on the first attribute resource and the operation of the second unit on the second attribute resource; or, The handover between the first attribute resource corresponding to the second unit and the second attribute resource corresponding to the second unit; Among them, the first attribute resource includes at least one of the following: unavailable NA resource, soft resource not indicated as available NIA, time unit where the NA resource is located, time unit where the NIA soft resource is located; The second attribute resource includes at least one of the following: the resource occupied by the elements in the first element set, the NA resource or NIA soft resource occupied by the elements in the first element set, the time unit where the resource occupied by the elements in the first element set is located, the time unit where the NA resource or NIA soft resource occupied by the elements in the first element set is located.

22. The method according to claim 21, wherein The first element set is an empty set, or the first element set includes at least one of the following elements: Periodic CSI-RS, SSB, RACH, SR, PDCCH corresponding to the type 0 search space.

23. The method according to claim 22, wherein The PDCCH corresponding to the type 0 search space is the PDCCH corresponding to the type 0 search space configured in the MIB.

24. The method according to claim 21, wherein The first node is an IAB node, and the second node is the parent node of the first node; The first unit is the MT of the IAB node, and the second node is the DU of the IAB node.

25. The method according to claim 21, wherein The elements included in the first element set are predefined or determined according to signaling.

26. A first node, characterized in that, Include: One or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the symbol reservation method according to any one of claims 1-8 or the inquiry method according to any one of claims 16-20.

27. A second node, characterized in that, Comprising: One or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the symbol reservation method according to any one of claims 9-15 or the notification method according to any one of claims 21-25.

28. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the symbol reservation method according to any one of claims 1-8, the symbol reservation method according to any one of claims 9-15, the inquiry method according to any one of claims 16-20, or the notification method according to any one of claims 21-25.

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