Channel quality indication reporting method and self-backhaul node - Patents.com

Abstract

An embodiment of the present invention provides a channel quality indication reporting method and a self-backhaul node, the channel quality indication reporting method including: obtaining a target CQI type that needs to be reported, where different interference information is used when calculating CQIs of different target CQI types, and the interference information used when calculating CQIs of the target CQI types takes into account interference to the IAB-DU receiving the IAB-MT; and calculating and reporting the CQI of the target CQI type.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to China Patent Application No. 202010393800.X, filed in China on May 11, 2020, the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE DISCLOSURE The embodiments of the present invention relate to the field of wireless communication technology, and in particular to a channel quality indication reporting method and a self-backhaul node. [Background technology]

[0003] The Integrated Access Backhaul (IAB) system was introduced to solve the situation where wired transmission networks are not sufficiently deployed when access points are densely deployed. That is, when there is no wired transmission network, the access point can rely on wireless for backhaul.

[0004] One IAB node includes a distributed unit (DU) functional portion and a mobile termination (MT) functional portion.

[0005] In the New Radio (NR) interference handling method, an IAB-MT can measure the interference information of its channel and report a Channel Quality Indicator (CQI) to its parent IAB node.

[0006] However, currently, in the channel interference information measured by the IAB-MT and the reported CQI, the situation of interference thereto by the IAB-DU is not taken into account, which causes inaccuracies in the reported CQI, thereby affecting the transmission of the backhaul link. Summary of the Invention [Problem to be solved by the invention]

[0007] The embodiments of the present invention provide a channel quality indication reporting method and a self-backhaul node, which are used to solve the problem that the channel interference information measured by the IAB-MT and the reported CQI do not take into account the interference situation caused by the IAB-DU, causing the reported CQI to be inaccurate, thereby affecting the transmission of the backhaul link. [Means for solving the problem]

[0008] In order to solve the above technical problems, the present invention is realized as follows.

[0009] According to a first aspect, an embodiment of the present invention provides a channel quality indication reporting method for an IAB node including an IAB-DU and an IAB-MT, the method comprising: Obtaining a target CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating the CQIs of the target CQI types takes into account interference to reception of the IAB-MT by the IAB-DU; and calculating and reporting a CQI of the target CQI type.

[0010] According to a second aspect, an embodiment of the present invention provides a channel quality indication reporting method for use in an IAB node, the method comprising: receiving CQI reported by sub-IAB nodes including IAB-DU and IAB-MT; Determining a target CQI type of a reported CQI, wherein interference information used when calculating the CQI of different target CQI types is different, and the interference information used when calculating the CQI of the target CQI type includes taking into account interference to reception of the IAB-MT by the IAB-DU.

[0011] According to a third aspect, an embodiment of the present invention provides a self-backhaul node, the self-backhaul node comprising: a first acquisition module for acquiring a target CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating CQIs of the target CQI types takes into account interference to reception of the IAB-MT by the IAB-DU; and a reporting module for calculating and reporting a CQI of the target CQI type.

[0012] Optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0013] Optionally, the target CQI type is: A method defined by a protocol; A method of being deployed by a parent IAB node or CU; A method dynamically instructed by a parent IAB node or CU; and a method determined by the IAB node.

[0014] Optionally, if the target CQI type is configured by a parent IAB node or a CU, the first acquisition module is used to receive CSI report configuration information, where the CSI report configuration information carries the target CQI type.

[0015] Alternatively, the CSI report configuration information includes a CSI report number field, the CSI report number field includes at least one CQI report item, and the CQI report item indicates at least one of the target CQI types that need to be reported; or The CSI report configuration information includes a CSI report number field and an indication field, where the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

[0016] Optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0017] Optionally, if the target CQI type is dynamically indicated by a parent IAB node or a CU, the first acquisition module is used to receive downlink control information, and the downlink control information is used to indicate at least one of the target CQI types that need to be reported.

[0018] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0019] Optionally, the reporting module is used to carry the target CQI type when reporting CQI.

[0020] Optionally, the IAB node: The method further includes a second obtaining module for obtaining CSI report configuration information, the CSI report configuration information carrying an indication of whether to carry the target CQI type when reporting CQI.

[0021] Optionally, the first acquisition module is used to acquire a target CQI type that needs to be reported based on the configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources, and crosslink interference measurement resources.

[0022] Optionally, the first acquisition module: If the channel measurement resource and / or the interference measurement resource is configured at a first time, the first time includes the reception of the IAB-MT and the transmission of the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; If the configuration of the interference measurement resource overlaps with the configuration of the crosslink interference measurement resource, the determined target CQI type at least one of includes a second CQI type and a fifth CQI type.

[0023] According to a fourth aspect, an embodiment of the present invention provides a self-backhaul node, the self-backhaul node comprising: A receiving module for receiving CQI reported by sub-IAB nodes including IAB-DU and IAB-MT; a determination module for determining a target CQI type of a reported CQI, wherein interference information used when calculating CQI of different target CQI types is different, and the interference information used when calculating CQI of the target CQI type takes into account interference to reception of the IAB-MT by the IAB-DU.

[0024] Optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0025] Optionally, the target CQI type is: A method defined by a protocol; A method of being deployed by the IAB node or CU; A method dynamically instructed by the IAB node or CU; and a method determined by the sub-IAB node.

[0026] Alternatively, if the target CQI type is configured by the IAB node or the CU, the IAB node: The IAB node further includes a first sending module for sending CSI report configuration information to the sub-IAB node, where the CSI report configuration information carries the target CQI type.

[0027] Alternatively, the CSI report configuration information includes a CSI report number field, the CSI report number field includes at least one CQI report item, and the CQI report item is used to indicate at least one of the target CQI types that need to be reported; or The CSI report configuration information includes a CSI report number field and an indication field, where the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

[0028] Optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0029] Alternatively, if the target CQI type is dynamically indicated by the IAB node or the CU, the IAB node: Further comprising a second sending module for sending downlink control information to the sub-IAB node, the downlink control information being used to indicate at least one of the target CQI types that need to be reported.

[0030] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0031] Optionally, the determining module is adapted to obtain the target CQI type carried in the reported CQI.

[0032] Optionally, the IAB node: The IAB node further includes a third sending module for sending CSI report configuration information to the sub-IAB node, where the CSI report configuration information carries an indication of whether to carry the target CQI type when reporting CQI.

[0033] Optionally, the determination module is used to determine a target CQI type of the reported CQI based on the configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources and crosslink interference measurement resources.

[0034] Optionally, the decision module further comprises: If the channel measurement resource and / or the interference measurement resource is configured at a first time, the first time includes the reception of the IAB-MT and the transmission of the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; If the configuration of the interference measurement resource overlaps with the configuration of the crosslink interference measurement resource, the determined target CQI type is used to implement at least one of including at least one of a second CQI type and a fifth CQI type.

[0035] According to a fifth aspect, an embodiment of the present invention provides a terminal, comprising a processor, a memory, and a computer program stored in the memory and operable to run on the processor, the computer program, when executed by the processor, realizing steps of the channel quality indication reporting method of the first aspect described above, or the computer program, when executed by the processor, realizing steps of the channel quality indication reporting method of the second aspect described above.

[0036] According to a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, the computer program being configured to, when executed by a processor, implement the steps of the channel quality indication reporting method of the first aspect above, or the computer program being configured to, when executed by a processor, implement the steps of the channel quality indication reporting method of the second aspect above. Effect of the Invention

[0037] In an embodiment of the present invention, the CQI reported by the IAB node can reflect the interference to the IAB-MT by the IAB-DU, thereby making the reported CQI more accurate. [Brief description of the drawings]

[0038]

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[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The drawings are intended only for the purpose of illustrating the preferred embodiments and should not be considered as limiting the present invention. The same reference numerals represent the same elements in all drawings. The term "comprises" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive "comprises", for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or devices. Note that "and / or" used in the specification and claims represents at least one of the connected objects, for example, A and / or B represents three cases: A alone, B alone, and a combination of A and B.

[0040] In the embodiments of the invention, terms such as "exemplary" or "for example" are used to describe as an example, illustration, or explanation. In the embodiments of the invention, any embodiment or design described as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, use of terms such as "exemplary" or "for example" is intended to present the relevant concept in a concrete manner.

[0041] The following describes an embodiment of the present invention in conjunction with the drawings. The channel quality indication reporting method and the self-backhaul node according to the embodiment of the present invention can be applied to a wireless communication system. The wireless communication system can adopt a 5G system, or an evolved long term evolution (eLTE) system, or a subsequent evolved communication system.

[0042] In the following, communication terms related to the embodiment of the present invention will first be explained.

[0043] (1) Integrated Access Backhaul (IAB) system FIG. 1 shows a schematic diagram of an IAB system. For one access point (i.e., an access IAB node in FIG. 1), one upstream access point (i.e., an intermediate IAB node in FIG. 1, also called a parent IAB node) can be found, and establishes a wireless connection with the upstream access point, which is called a backhaul link, and the upstream access point needs to further establish a wireless connection with a donor IAB node to establish a complete backhaul link. A complete backhaul link includes one donor IAB node, which is directly connected to a wired transmission network via a cable. After an IAB node establishes a complete backhaul link, this IAB node can provide access services to a user equipment (UE).

[0044] FIG. 2 shows a schematic diagram of the centralized unit-distributed unit (CU-DU) structure of an IAB system. An IAB node includes a distributed unit (DU) function part and a mobile termination (MT) function part. A donor IAB node does not have an MT function part. It can request an MT to find an upstream access point for an access point, and establish a backhaul link with the DU of the upstream access point. After an IAB node establishes a complete backhaul link, the IAB node turns on its DU function, and the DU provides cell service, that is, the DU can provide access service to the UE. In a backhaul link, the DUs of all IAB nodes are all connected to a centralized unit (CU) node, and the CU node configures the DU through the F1-AP protocol and configures the MT through the Radio Resource Control (RRC) protocol.

[0045] (2) Interference situation with IAB-DU and IAB-MT The DU and MT of one IAB node can transmit (TX) and receive (RX) independently, and the transmission and reception of the IAB-DU interferes with the reception of the IAB-MT.

[0046] The situation of interference to IAB-MT reception due to IAB-DU transmission can be seen in Figure 3. When IAB-DU transmission (TX) and IAB-MT reception (RX) are performed simultaneously, the IAB-DU transmission will interfere with IAB-MT reception. The situation of interference to IAB-MT reception due to IAB-DU reception can be seen in Figure 4. When IAB-DU reception (RX) and IAB-MT reception (RX) are performed simultaneously, the signal transmitted to IAB-DU may leak to IAB-MT, causing interference to IAB-MT reception.

[0047] (3) Interference measurement and Channel Quality Indicator (CQI) reporting In the NR interference handling method, the IAB-MT can measure the interference information of its channel and report the CQI to its parent IAB node.

[0048] However, currently, in the channel interference information measured by the IAB-MT and the reported CQI, the interference situation caused by the IAB-DU is not taken into account, which causes inaccuracies in the reported CQI, thereby affecting the transmission of the backhaul link.

[0049] In order to solve the above problem, please refer to FIG. 5. FIG. 5 is a flow diagram of a channel quality indication reporting method according to an embodiment of the present invention, which is used in an IAB node including an IAB-DU and an IAB-MT, and the method includes: a step 51 of obtaining a target CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating CQIs of the target CQI types takes into account interference to reception of the IAB-MT by the IAB-DU; and calculating and reporting 52 a CQI of the target CQI type.

[0050] In an embodiment of the present invention, the CQI reported by the IAB node can reflect the interference to the IAB-MT by the IAB-DU, so that the reported CQI is more accurate.

[0051] In an embodiment of the present invention, optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0052] Here, the interference information used when calculating the CQI of the fourth CQI type and / or the interference information used when calculating the CQI of the fifth CQI type is the maximum reference interference received by the IAB-MT at the corresponding time.

[0053] (1) In some embodiments of the present invention, the target CQI type may be determined according to an indication manner, which is described below by way of example.

[0054] In an embodiment of the present invention, the target CQI type is obtained by at least one of the following manners:

[0055] 1) A method defined by a protocol.

[0056] 2) A method in which the node is deployed by a parent IAB node or a CU.

[0057] If the target CQI type is configured by a parent IAB node or a CU, optionally, the obtaining the target CQI type that needs to be reported includes receiving CSI report configuration information, where the CSI report configuration information carries the target CQI type, where the CSI report configuration information may be, for example, a CSI-ReportConfig (channel state information report configuration).

[0058] In some embodiments of the present invention, optionally, the CSI report configuration information includes a CSI report number field, which includes at least one CQI report item (e.g., cri-RI-PMI-CQI_TypeA, cri-RI-PMI-CQI_TypeB, cri-RI-PMI-CQI_TypeA&B in the following embodiment 1), and the CQI report item indicates at least one of the target CQI types that need to be reported.

[0059] In an embodiment of the present invention, optionally, the CQI report item is one of a plurality of optional CQI report items defined by a protocol.

[0060] In an embodiment of the present invention, optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0061] In some embodiments of the present invention, the CSI report configuration information optionally includes a CSI report quantity field and an indication field, the CSI report quantity field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item. The CSI report quantity field is, for example, CSI reportQuantity.

[0062] In an embodiment of the present invention, optionally, the indication field includes a target parameter, which is used to indicate at least one target CQI type corresponding to the CQI report item, and the target parameter is one of a plurality of optional parameters defined by a protocol.

[0063] In an embodiment of the present invention, optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0064] In the embodiment of the present invention, when configuring the target CQI type, the configuration can be performed by adopting conventional CSI report configuration information, thereby minimizing the signaling overhead and reducing the impact on the complexity of the equipment.

[0065] 3) A method dynamically instructed by a parent IAB node or a CU.

[0066] Optionally, if the target CQI type is dynamically indicated by a parent IAB node or a CU, obtaining the target CQI type that needs to be reported includes receiving Downlink Control Information (DCI), the DCI being used to indicate the at least one target CQI type that needs to be reported.

[0067] Optionally, the downlink control information includes a target code point, the target code point being used to indicate at least one target CQI type that needs to be reported, and the target CQI type indicated by the target code point is at least one of various CQI types agreed upon by a protocol.

[0068] Optionally, the target code point is one of a number of alternative code points defined by a protocol.

[0069] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0070] In the embodiment of the present invention, when indicating a target CQI type, the conventional DCI can be adopted to indicate it, thereby minimizing the signaling overhead and reducing the impact on the complexity of the equipment.

[0071] 4) A method in which the IAB node determines the route.

[0072] In an embodiment of the present invention, optionally, the calculating and reporting of a CQI of the target CQI type includes carrying the target CQI type when reporting a CQI, for example, the target CQI type may be carried in a fixed field in CSI signaling carrying a CQI report.

[0073] This method is particularly applicable to a situation where the target CQI type is determined by the IAB node, and since the target CQI type is determined by the IAB node, the IAB node can carry the target CQI type when reporting CQI, so that the parent IAB node can clearly understand the CQI type reported by the IAB node, and the understanding of both is consistent.

[0074] In an embodiment of the present invention, the method optionally further includes, before calculating and reporting the CQI of the target CQI type, obtaining CSI report configuration information, the CSI report configuration information carrying an indication of whether to carry the target CQI type when reporting the CQI. The CSI report configuration information may be, for example, a CSI-ReportConfig.

[0075] (2) In some embodiments of the present invention, the target CQI type may be implicitly determined by the behavior of the IAB node, which is described below by way of an example.

[0076] In some embodiments of the present invention, obtaining the target CQI type that needs to be reported includes obtaining the target CQI type that needs to be reported based on a configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources, and crosslink interference measurement resources.

[0077] Optionally, obtaining a target CQI type that needs to be reported based on the configuration of measurement resources includes at least one of the following:

[0078] 1) if a channel measurement resource and / or an interference measurement resource is configured at a first time, the first time includes receiving the IAB-MT and transmitting the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; That is, the target CQI type is A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A fourth CQI type, wherein the interference information used when calculating a CQI of the fourth CQI type includes at least one of a fourth CQI type including a sum of interference to reception of the IAB-MT due to transmission of the IAB-DU and interference to reception of the IAB-MT due to other interference sources.

[0079] 2) if the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; That is, the target CQI type is A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A fifth CQI type, wherein the interference information used when calculating a CQI of the fifth CQI type includes at least one of a fifth CQI type including a sum of interference to reception of the IAB-MT due to reception of the IAB-DU and interference to reception of the IAB-MT due to other interference sources.

[0080] 3) If the configuration of the interference measurement resource overlaps (partially or completely overlaps) with the configuration of the cross link interference (CLI) measurement resource, the determined target CQI type includes at least one of the second CQI type and the fifth CQI type.

[0081] The crosslink interference measurement resource configuration may include, for example, SRS-RSRP (Reference Signal Received Power) and / or SRS-RSSI (Received Signal Strength Indication) measurement resources.

[0082] That is, the target CQI type is A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A fifth CQI type, wherein the interference information used when calculating a CQI of the fifth CQI type includes at least one of a fifth CQI type including a sum of interference to reception of the IAB-MT due to reception of the IAB-DU and interference to reception of the IAB-MT due to other interference sources.

[0083] Please refer to FIG. 6, which is a flow diagram of a channel quality indication reporting method according to another embodiment of the present invention, which is used in an IAB node, Step 61 of receiving CQI reported by sub-IAB nodes including IAB-DU and IAB-MT; and determining a target CQI type for the reported CQI, wherein interference information used when calculating the CQI for different target CQI types is different, and the interference information used when calculating the CQI for the target CQI type takes into account interference to reception of the IAB-MT by the IAB-DU.

[0084] In an embodiment of the present invention, for a CQI reported by a sub-IAB node, the reported CQI takes into consideration the interference to the IAB-MT unit caused by the IAB-DU unit in the sub-IAB node, so that the IAB node responsible for scheduling the sub-IAB node can adjust transmission parameters according to the interference situation to the IAB-MT unit caused by the IAB-DU unit in the sub-IAB node.

[0085] In an embodiment of the present invention, optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein the interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources. Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0086] (1) In some embodiments of the present invention, the target CQI type may be determined according to an indication manner, which is described below by way of example.

[0087] Optionally, the target CQI type is determined by at least one of the following manners:

[0088] 1) A method defined by a protocol.

[0089] 2) A method in which the IAB node or CU is deployed.

[0090] If the target CQI type is configured by the IAB node or CU, optionally, the method further includes transmitting CSI report configuration information to the sub-IAB node before receiving the CQI reported by the sub-IAB node, where the CSI report configuration information carries the target CQI type.

[0091] In some embodiments of the present invention, optionally, the CSI report configuration information includes a CSI report number field, the CSI report number field including at least one CQI report item, and the CQI report item indicating at least one of the target CQI types that need to be reported.

[0092] Optionally, the CQI reporting item is one of a number of optional parameter items defined by a protocol.

[0093] In some embodiments of the present invention, optionally, the CSI report configuration information includes a CSI report number field and an indication field, the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

[0094] Optionally, the indication field includes a target parameter, which is used to indicate at least one target CQI type corresponding to the CQI report item, and the target parameter is one of a plurality of optional parameters defined by a protocol.

[0095] Optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0096] 3) A method dynamically instructed by the IAB node or CU.

[0097] If the target CQI type is dynamically indicated by the IAB node or CU, optionally, the method further includes transmitting downlink control information to the sub-IAB node before receiving the CQI reported by the sub-IAB node, the downlink control information being used to indicate at least one of the target CQI types that need to be reported.

[0098] Optionally, the downlink control information includes a target code point, the target code point being used to indicate at least one target CQI type that needs to be reported, and the target CQI type indicated by the target code point is at least one of various CQI types agreed upon by a protocol.

[0099] Optionally, the target code point is one of a number of alternative code points defined by a protocol.

[0100] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0101] 4) A method determined by the sub-IAB node.

[0102] Optionally, determining a target CQI type of a reported CQI includes obtaining the target CQI type carried in the reported CQI.

[0103] Optionally, before determining a target CQI type of the reported CQI, the method further includes sending CSI report configuration information to the sub-IAB node, the CSI report configuration information carrying an indication of whether to carry the target CQI type when reporting CQI.

[0104] (2) In some embodiments of the present invention, the target CQI type may be implicitly identified, which is described below by way of example.

[0105] In some embodiments of the present invention, determining a target CQI type of the reported CQI includes determining a target CQI type of the reported CQI based on a configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources, and crosslink interference measurement resources.

[0106] Optionally, determining a target CQI type of the reported CQI based on the configuration of measurement resources includes: If the channel measurement resource and / or the interference measurement resource is configured at a first time, the first time includes the reception of the IAB-MT and the transmission of the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; If the configuration of the interference measurement resource overlaps with the configuration of the crosslink interference measurement resource, the determined target CQI type includes at least one of a second CQI type and a fifth CQI type.

[0107] The method for determining the target CQI type in the embodiment of the present invention will be described below in conjunction with a specific embodiment.

[0108] Example 1 In an embodiment of the present invention, the target CQI type is configured by a parent IAB node or a CU, for example configured in a CSI-ReportConfig, where the CSI-ReportConfig includes a CSI reportQuantity field, which includes at least one CQI report item (for example, cri-RI-PMI-CQI_TypeA, cri-RI-PMI-CQI_TypeB, cri-RI-PMI-CQI_TypeA&B below), which is used to indicate at least one of the target CQI types that need to be reported.

[0109] In an embodiment of the present invention, optionally, the CQI report item is one of a plurality of optional CQI report items defined by a protocol. If the optional CQI report items defined by the protocol include cri-RI-PMI-CQI_TypeA, cri-RI-PMI-CQI_TypeB, and cri-RI-PMI-CQI_TypeA&B, the CQI report item selects one from cri-RI-PMI-CQI_TypeA, cri-RI-PMI-CQI_TypeB, and cri-RI-PMI-CQI_TypeA&B. Here, cri-RI-PMI-CQI_TypeA is used to indicate that the target CQI type to be reported is Type A, and cri-RI-PMI-CQI_TypeA&B is used to indicate that the target CQI type to be reported is Type A and Type B.

[0110] In an embodiment of the present invention, optionally, the target CQI type carried in the CSI reportQuantity field is at least one of various optional CQI types stipulated by a protocol. If the optional CQI types stipulated by a protocol include Type A and Type B, the target CQI type carried in the CSI reportQuantity field is Type A, Type B, or Type A & Type B.

[0111] The layout of CSI-ReportConfig is as follows, and the underlined parts are newly added items.

[0112] reportQuantity CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-PMI-CQI_TypeA NULL, cri-RI-PMI-CQI_TypeB NULL, cri-RI-PMI-CQI_TypeA&B NULL, … cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-i1-CQI_TypeA SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-i1-CQI_TypeB SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-i1-CQI_TypeA&B SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, … cri-RI-CQI NULL, cri-RI-CQI_TypeA NULL, cri-RI-CQI_TypeB NULL, cri-RI-CQI_TypeA&B NULL, … cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL cri-RI-LI-PMI-CQI_TypeA NULL cri-RI-LI-PMI-CQI_TypeB NULL cri-RI-LI-PMI-CQI_TypeA&B NULL … },

[0113] Example 2 In an embodiment of the present invention, the target CQI type is configured by a parent IAB node or a CU, for example configured in a CSI-ReportConfig, where the CSI-ReportConfig includes a CSI reportQuantity field and an indication field, where the CSI reportQuantity field includes at least one CQI report item (for example, cri-RI-PMI-CQI, cri-RI-i1-CQI, etc., as described below), and the indication field includes a target parameter (for example, TypeA, TypeB, TypeA&B, as described below), which is used to indicate at least one of the target CQI types corresponding to the CQI report item. The indication field is incorporated into the CSI reportQuantity field or is a field parallel to the CSI reportQuantity field.

[0114] In an embodiment of the present invention, optionally, the target parameter is one of a plurality of optional parameters defined by a protocol, for example, the optional parameters defined by the protocol include TypeA, TypeB, and TypeA&B, and the indication field carries one of TypeA, TypeB, and TypeA&B.

[0115] reportQuantity CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-CQI NULL, cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL}, CQIType CHOICE { None NULL, TypeA NULL, TypeB NULL, TypeA&B NULL, … }

[0116] Referring to FIG. 7, the present invention further provides a self-backhaul node 70, the IAB node 70 including: an IAB-DU and an IAB-MT; a first acquisition module 71 for acquiring a target CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating CQIs of the target CQI types takes into account interference to the reception of the IAB-MT by the IAB-DU; and a reporting module 72 for calculating and reporting a CQI of the target CQI type.

[0117] In an embodiment of the present invention, the CQI reported by the IAB node can reflect the interference to the IAB-MT by the IAB-DU, so that the reported CQI is more accurate.

[0118] Optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0119] Optionally, the target CQI type is: A method defined by a protocol; A method of being deployed by a parent IAB node or CU; A method dynamically instructed by a parent IAB node or CU; and a method determined by the IAB node.

[0120] Optionally, if the target CQI type is configured by a parent IAB node or a CU, the first acquisition module is used to receive CSI report configuration information, where the CSI report configuration information carries the target CQI type.

[0121] Alternatively, the CSI report configuration information includes a CSI report number field, the CSI report number field includes at least one CQI report item, and the CQI report item indicates at least one of the target CQI types that need to be reported; or The CSI report configuration information includes a CSI report number field and an indication field, where the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

[0122] Optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0123] Optionally, if the target CQI type is dynamically indicated by a parent IAB node or a CU, the first acquisition module is used to receive downlink control information, and the downlink control information is used to indicate at least one of the target CQI types that need to be reported.

[0124] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0125] Optionally, the reporting module is used to carry the target CQI type when reporting CQI.

[0126] Optionally, the IAB node: The method further includes a second obtaining module for obtaining CSI report configuration information, the CSI report configuration information carrying an indication of whether to carry the target CQI type when reporting CQI.

[0127] Optionally, the first acquisition module is used to acquire a target CQI type that needs to be reported based on the configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources, and crosslink interference measurement resources.

[0128] Optionally, the first acquisition module: If the channel measurement resource and / or the interference measurement resource is configured at a first time, the first time includes the reception of the IAB-MT and the transmission of the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; If the configuration of the interference measurement resource overlaps with the configuration of the crosslink interference measurement resource, the determined target CQI type at least one of includes a second CQI type and a fifth CQI type.

[0129] The terminal according to the embodiment of the present invention can implement each process implemented by the IAB node in the embodiment of the method of FIG. 5, and will not be further described here to avoid repetition.

[0130] Referring to FIG. 8, the present invention further provides a self-backhaul node 80, a receiving module 81 for receiving CQI reported by sub-IAB nodes including IAB-DU and IAB-MT; a determination module 82 for determining a target CQI type of a reported CQI, where interference information used when calculating CQI of different target CQI types is different, and the interference information used when calculating CQI of the target CQI type takes into account interference to reception of the IAB-MT by the IAB-DU.

[0131] In an embodiment of the present invention, for a CQI reported by a sub-IAB node, the reported CQI takes into consideration the interference to the IAB-MT unit caused by the IAB-DU unit in the sub-IAB node, so that the IAB node responsible for scheduling the sub-IAB node can adjust transmission parameters according to the interference situation to the IAB-MT unit caused by the IAB-DU unit in the sub-IAB node.

[0132] Optionally, the target CQI type is: A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, in which interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to the reception of the IAB-MT caused by the reception of the IAB-DU and interference to the reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

[0133] Optionally, the target CQI type is: A method defined by a protocol; A method of being deployed by the IAB node or CU; A method dynamically instructed by the IAB node or CU; and a method determined by the sub-IAB node.

[0134] Alternatively, if the target CQI type is configured by the IAB node or the CU, the IAB node: The IAB node further includes a first sending module for sending CSI report configuration information to the sub-IAB node, where the CSI report configuration information carries the target CQI type.

[0135] Alternatively, the CSI report configuration information includes a CSI report number field, the CSI report number field includes at least one CQI report item, and the CQI report item is used to indicate at least one of the target CQI types that need to be reported; or The CSI report configuration information includes a CSI report number field and an indication field, where the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

[0136] Optionally, the target CQI type carried in the CSI report configuration information is at least one of various optional CQI types stipulated by a protocol.

[0137] Alternatively, if the target CQI type is dynamically indicated by the IAB node or the CU, the IAB node: Further comprising a second sending module for sending downlink control information to the sub-IAB node, the downlink control information being used to indicate at least one of the target CQI types that need to be reported.

[0138] Optionally, the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

[0139] Optionally, the determining module is adapted to obtain the target CQI type carried in the reported CQI.

[0140] Optionally, the IAB node: The IAB node further includes a third sending module for sending CSI report configuration information to the sub-IAB node, where the CSI report configuration information carries an indication of whether to carry the target CQI type when reporting CQI.

[0141] Optionally, the determination module is used to determine a target CQI type of the reported CQI based on the configuration of measurement resources, where the measurement resources include at least one of channel measurement resources, interference measurement resources and crosslink interference measurement resources.

[0142] Optionally, the decision module further comprises: If the channel measurement resource and / or the interference measurement resource is configured at a first time, the first time includes the reception of the IAB-MT and the transmission of the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; If the configuration of the interference measurement resource overlaps with the configuration of the crosslink interference measurement resource, the determined target CQI type is used to implement at least one of including at least one of a second CQI type and a fifth CQI type.

[0143] The terminal according to the embodiment of the present invention can implement each process implemented by the IAB node in the embodiment of the method of FIG. 6, and will not be further described here to avoid repetition.

[0144] Preferably, the embodiment of the present invention further provides a self-backhaul node 90, which includes a processor 91, a memory 92, and a computer program stored in the memory 92 and operable on the processor 91, which, when executed by the processor 91, can realize each process of the embodiment of the channel quality indication reporting method shown in Fig. 5 above, and achieve the same technical effect. In order to avoid repetition, no further description will be given here.

[0145] Preferably, the embodiment of the present invention further provides a self-backhaul node 100, which includes a processor 101, a memory 102, and a computer program stored in the memory 102 and operable on the processor 101, which, when executed by the processor 101, can realize each process of the embodiment of the channel quality indication reporting method shown in Fig. 6 above, and achieve the same technical effect. In order to avoid repetition, no further description will be given here.

[0146] The embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it can realize each process of the embodiment of the channel quality indication reporting method shown in Figure 5 above, and achieve the same technical effects. In order to avoid repetition, no further description will be given here.

[0147] The embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it can realize each process of the embodiment of the channel quality indication reporting method shown in Figure 6 above, and achieve the same technical effects. In order to avoid repetition, no further description will be given here.

[0148] Among them, the computer-readable storage medium is, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

[0149] The processor may be one processor or a collective term for multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the method executed by the network side device, such as one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, etc. The storage element may be one memory or a collective term for multiple storage elements.

[0150] The memory may be volatile or non-volatile memory, or may include both volatile and non-volatile memory. Here, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), or flash memory. The volatile memory may be Random Access Memory (RAM), which is used as an external cache. By way of example, and not of limitation, many types of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM), and Direct Rambus Random Access Memory (Direct Rambus RAM, DRRAM). Memory as described herein is intended to include, without being limited to, these and any other suitable types of memory.

[0151] It should be explained that, in this specification, the terms "comprises," "including," or any other variation thereof, are intended to cover the non-exclusive "comprises," whereby a process, method, article, or apparatus that includes a set of elements not only includes those elements, but also includes other elements not expressly listed or that are inherent to such process, method, article, or apparatus. In the absence of further limitations, an element limited by the phrase "comprises a," does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes this element.

[0152] From the above description of the embodiments, it is clear to those skilled in the art that the methods of the above embodiments can be realized in the form of software and a necessary general-purpose hardware platform. Of course, they can also be realized in hardware, but in many cases the former is a more preferred embodiment. Based on this understanding, the technical solution of the present invention may be substantially or in part embodied in the form of a software product. This computer software product is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes some instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0153] The above describes the embodiments of the present invention in conjunction with the drawings, but the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not limiting. Those skilled in the art can implement many forms based on the suggestions of the present invention without departing from the spirit of the present invention and the scope of protection of the claims, and all of them belong to the protection scope of the present invention.

Claims

1. A channel quality indication reporting method for a self-backhauled IAB node, including an IAB node distribution unit IAB-DU and an IAB node mobile terminal IAB-MT, comprising: Obtaining a target channel quality indication CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating the CQIs of the target CQI types takes into account interference to reception of the IAB-MT by the IAB-DU; calculating and reporting a CQI of the target CQI type to a parent IAB node; The target CQI type is A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, wherein interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to reception of the IAB-MT caused by reception of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

2. The target CQI type is A method defined by a protocol; A method of being arranged by a parent IAB node or a centralization unit CU; A method dynamically instructed by a parent IAB node or CU; and a method determined by the IAB node.

3. When the target CQI type is obtained in a manner configured by the parent IAB node or the centralized unit CU, obtaining the target CQI type to be reported includes: The method of claim 2 , comprising receiving channel state information (CSI) report configuration information, the CSI report configuration information conveying the target CQI type.

4. The CSI report configuration information includes a CSI report number field, the CSI report number field includes at least one CQI report item, and the CQI report item indicates at least one of the target CQI types that need to be reported; or 4. The method of claim 3, wherein the CSI report configuration information includes a CSI report number field and an indication field, the CSI report number field includes at least one CQI report item, and the indication field is used to indicate at least one of the target CQI types corresponding to the CQI report item.

5. If the target CQI type is dynamically indicated by a parent IAB node or a CU, obtaining the target CQI type that needs to be reported includes:

3. The method of claim 2, comprising receiving downlink control information, the downlink control information being used to indicate at least one of the target CQI types that needs to be reported.

6. The method of claim 5 , wherein the downlink control information is downlink control information that triggers aperiodic or semi-static CSI reporting.

7. The calculating and reporting of the target CQI type CQI includes: The method of claim 2 , comprising conveying the target CQI type when reporting CQI.

8. before calculating and reporting the CQI of the target CQI type, The method of claim 7, further comprising obtaining CSI report configuration information, the CSI report configuration information carrying an indication of whether to carry the target CQI type in a CQI report.

9. The obtaining of the target CQI type to be reported includes: The method of claim 1 , comprising: obtaining a target CQI type that needs to be reported based on a configuration of measurement resources, the measurement resources including at least one of a channel measurement resource, an interference measurement resource, and a crosslink interference measurement resource.

10. The method includes: obtaining a target CQI type that needs to be reported based on the configuration of measurement resources; If a channel measurement resource and / or an interference measurement resource is configured at a first time, the first time includes receiving the IAB-MT and transmitting the IAB-DU, and the determined target CQI type includes at least one of a first CQI type and a fourth CQI type; If the channel measurement resource and / or the interference measurement resource is configured at a second time, the second time includes receiving the IAB-MT and receiving the IAB-DU, and the determined target CQI type includes at least one of a second CQI type and a fifth CQI type; 10. The method of claim 9, further comprising at least one of: if an arrangement of interference measurement resources overlaps with an arrangement of crosslink interference measurement resources, the determined target CQI type includes at least one of a second CQI type and a fifth CQI type.

11. A channel quality indication reporting method for use in an IAB node, comprising: receiving CQI reported by a sub-IAB node including an IAB-DU and an IAB-MT; determining a target CQI type of the reported CQI, where interference information used when calculating the CQI of different target CQI types is different, and the interference information used when calculating the CQI of the target CQI type includes taking into account interference to reception of the IAB-MT by the IAB-DU; The target CQI type is A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, wherein interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to reception of the IAB-MT caused by reception of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; Here, the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

12. A self-backhaul node, a first acquisition module for acquiring a target CQI type that needs to be reported, where interference information used when calculating CQIs of different target CQI types is different, and the interference information used when calculating CQIs of the target CQI types takes into account interference to reception of the IAB-MT by the IAB-DU; a reporting module for calculating and reporting a CQI of the target CQI type to a parent IAB node; The target CQI type is A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, wherein interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to reception of the IAB-MT caused by reception of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; A self-backhaul node, wherein the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

13. A self-backhaul node, A receiving module for receiving CQI reported by a sub-IAB node including an IAB-DU and an IAB-MT; a determination module for determining a target CQI type of a reported CQI, where interference information used when calculating a CQI of different target CQI types is different, and the interference information used when calculating the CQI of the target CQI type takes into account interference to reception of the IAB-MT by the IAB-DU; The target CQI type is A first CQI type, wherein interference information used when calculating a CQI of the first CQI type includes interference to reception of the IAB-MT due to transmission of the IAB-DU; A second CQI type, wherein interference information used when calculating a CQI of the second CQI type includes interference to reception of the IAB-MT due to reception of the IAB-DU; A third CQI type, wherein interference information used when calculating a CQI of the third CQI type includes interference to reception of the IAB-MT caused by other interference sources; A fourth CQI type, wherein interference information used when calculating a CQI of the fourth CQI type includes a sum of interference to reception of the IAB-MT caused by transmission of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; a fifth CQI type, wherein interference information used when calculating a CQI of the fifth CQI type includes a sum of interference to reception of the IAB-MT caused by reception of the IAB-DU and interference to reception of the IAB-MT caused by other interference sources; A self-backhaul node, wherein the other interference source is other than interference to reception of the IAB-MT due to transmission and / or reception of the IAB-DU.

14. A computer readable storage medium having a computer program stored thereon, the computer program implementing the steps of the channel quality indication reporting method according to any one of claims 1 to 10 when executed by a processor.

15. A computer-readable storage medium on which a computer program is stored, the computer program implementing the steps of the channel quality indication reporting method of claim 11 when executed by a processor.

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