CN111901003A

CN111901003A - Multiplexing method, device, equipment and storage medium

Info

Publication number: CN111901003A
Application number: CN202010491628.1A
Authority: CN
Inventors: 刘文豪; 苗婷; 卢有雄; 邢卫民; 毕峰; 张淑娟
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-11-06
Also published as: WO2021244540A1

Abstract

The application provides a multiplexing method, a multiplexing device, multiplexing equipment and a storage medium, wherein the multiplexing method comprises the following steps: sending measurement configuration information to a second node, wherein the measurement configuration information is used for indicating the second node to measure relevant information of resources corresponding to the measurement configuration information; and receiving the measurement result sent by the second node.

Description

Multiplexing method, device, equipment and storage medium

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a multiplexing method, apparatus, device, and storage medium.

Background

An Integrated Access Backhaul (IAB) node includes a Mobile Termination (MT) Unit and a Distributed Unit (DU). The IAB node is connected to a previous node through the MT, the previous node is called a parent node (parent node), a link between the IAB MT and the parent node is called an Upstream, and a link between the IAB DU and a next node or a terminal is called a Downstream.

The IAB node simultaneously performs Upstream Transmission (Upstream Tx) and Downstream Transmission (Downstream Tx). The IAB node will perform Upstream reception (Upstream reception) and Downstream reception (Downstream reception) simultaneously. How to avoid the interference between two links is an urgent problem to be solved when simultaneously transmitting or receiving.

Disclosure of Invention

Methods, apparatuses, devices and storage media for multiplexing to coordinate interference between two links when an IAB node performs simultaneous transceiving operations are provided.

In a first aspect, an embodiment of the present application provides a multiplexing method,

the method is applied to a first node and comprises the following steps:

sending measurement configuration information to a second node, wherein the measurement configuration information is used for indicating the second node to measure relevant information of resources corresponding to the measurement configuration information;

and receiving the measurement result sent by the second node.

In a second aspect, an embodiment of the present application provides a multiplexing method, where the method is applied to a second node, and includes:

receiving measurement configuration information sent by a first node, wherein the measurement configuration information is used for indicating a second node to measure related information of resources corresponding to the measurement configuration information;

sending the measurement result to the first node.

In a third aspect, an embodiment of the present application provides a multiplexing apparatus, where the apparatus is configured at a first node, and includes:

a first sending module, configured to send measurement configuration information to a second node, where the measurement configuration information is used to instruct the second node to measure relevant information of a resource corresponding to the measurement configuration information;

a first receiving module configured to receive the measurement result sent by the second node.

In a fourth aspect, an embodiment of the present application provides a multiplexing apparatus, where the apparatus is configured at a second node, and includes:

the second receiving device is configured to receive measurement configuration information sent by the first node, wherein the measurement configuration information is used for instructing the second node to measure relevant information of resources corresponding to the measurement configuration information;

a second sending module configured to send the measurement result to the first node.

In a fifth aspect, an embodiment of the present application provides an apparatus, including:

one or more processors;

a memory for storing one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method as any one of the embodiments provides herein.

In a sixth aspect, embodiments of the present application provide a storage medium storing a computer program, which when executed by a processor implements the method according to any one of the embodiments of the present application.

With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.

Drawings

FIG. 1 is a schematic diagram of the relationships and links of nodes in an IAB network;

fig. 2 is a flowchart of a multiplexing method provided in an embodiment of the present application;

fig. 3 is a flowchart of a multiplexing method provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a period of a reference signal provided by an embodiment of the present application;

FIG. 5 is a diagram illustrating a time offset of a reference signal according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an effective measurement duration of a reference signal provided by an embodiment of the present application;

fig. 7 is a schematic diagram of a timing offset of an upstream transmission and a downstream transmission of an IAB node according to an embodiment of the present application;

fig. 8 is a schematic diagram illustrating an IAB node specifying a configuration rule for a parent node according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating that interference exists when an IAB node receives data of two links simultaneously according to an embodiment of the present application;

fig. 10 is a schematic diagram of a resource and reference signal mapping relationship provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a multiplexing apparatus provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a multiplexing method provided in an embodiment of the present application;

fig. 13 is a schematic structural diagram of an apparatus provided in an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

First, the relationship and links of each node in the IAB network will be described.

Fig. 1 is a schematic diagram of relationships and links of nodes in an IAB network, and as shown in fig. 1, three nodes from top to bottom are respectively called a parent node (parent node), an IAB node and a child node (child node) or a User Equipment (UE), and a node served by the IAB node in fig. 1 is the UE or the child node.

In Rel-16, the IAB node supports upstream (upstream) and downstream (downstream) time Division Multiplexing with high priority, but at the same time the protocol also supports support for other Multiplexing modes such as Frequency Division Multiplexing (FDM), Space Division Multiplexing (SDM) and full duplex for forward compatibility. The Distributed Unit (DU) of the IAB functions as a base station to provide network services to child nodes or terminals downstream, and the MT Unit of the IAB is connected to a parent node upstream.

The DU resource is a resource used by a DU unit of the IAB node to serve a child node or a terminal, for example, the DL resource of the DU is a resource used by the DU unit of the IAB node to transmit downstream data for the child node or the terminal. The MT resource of the IAB node is indicated by network side semi-static configuration and dynamic signaling of a parent node. The resources used by the DU units of the IAB node for downstream transmissions may correspond to the transmission resources upstream of the MT on which the IAB node has an opportunity to simultaneously transmit downstream and upstream transmissions. The resources used by the IAB node DU unit for downstream reception may correspond to the upstream reception resources of the MT on which the IAB node has the opportunity to perform both downstream and upstream reception.

How the interference between two links of such simultaneous reception or simultaneous transmission operation circumvents or coordinates needs to consider an effective scheme that otherwise affects the performance of the IAB node downstream and upstream transmissions.

In an embodiment, a multiplexing method is provided, and the method is applied to a first node, as shown in fig. 2, the multiplexing method provided in the embodiment of the present application mainly includes steps S11 and S12.

S11, sending measurement configuration information to the second node, wherein the measurement configuration information is used for indicating the second node to measure the relevant information of the resource corresponding to the measurement configuration information;

and S12, receiving a measurement result sent by the second node, wherein the measurement result is used for the first node to perform link transmission multiplexing.

In this embodiment, the first node is an IAB node as shown in fig. 1. The second node is a parent node as shown in fig. 1. Alternatively, the second node is a child node or UE as shown in fig. 1.

The measurement configuration information is information sent by the IAB node to the father node. And the father node carries out measurement according to the measurement configuration information and feeds back a measurement result to the IAB node. And when the IAB node simultaneously executes upstream transmission and downstream transmission, selecting a beam with small interference to the father node according to the measurement result to perform the downstream transmission.

In this embodiment, the measurement result fed back by the parent node to the IAB node includes at least one of the following: the resource index, the received Power of the corresponding resource, the path loss of the corresponding resource, and the Reference Signal Received Power (RSRP) of the corresponding resource, the parent node receives the Reference Signal Receiving Quality (RSRQ) or the Signal to interference plus Noise Ratio (SINR) or the Channel Quality Indicator (CQI) sent by the IAB node upstream.

In one embodiment, the measurement configuration information includes first measurement configuration information and second measurement configuration information, where the measurement configuration information includes reference signal configuration information for the second node to measure a reference signal, or the measurement configuration information includes time-frequency resource configuration information for the second node to measure a time-frequency resource. The second measurement configuration information includes the second node measurement corresponding quasi co-located reference signal configuration information or corresponding spatial reception parameters.

In one embodiment, in case the first measurement configuration information comprises reference signal configuration information for the second node to measure reference signals, the reference signal configuration information comprises one or more of:

frequency domain configuration information, sequence configuration information, power configuration information, time configuration information, whether time restriction is on or not.

In one embodiment, the type of the reference signal includes one or more of:

sounding Reference Signal (SRS), channel state information reference signal (CSI-RS), synchronization broadcast block (SSB), control channel reference signal (PDCCH DMRS), and traffic channel reference signal (PDSCH DMRS).

In one embodiment, in case that the measurement configuration information includes time-frequency resource configuration information for the second node to measure time-frequency resources, the time-frequency resource configuration information includes one or more of the following:

and whether the channel type, the frequency domain configuration information, the time configuration information and the time limit corresponding to the time-frequency resource are started or not.

In one embodiment, in case that the measurement configuration information includes time-frequency resource configuration information for the second node to measure time-frequency resources, the second measurement configuration information includes one or more of the following:

quasi co-location reference signals corresponding to time frequency resources and space receiving parameters.

In one embodiment, the time configuration information includes an occurrence time, an effective time, and a timing offset, wherein the effective time is an effective time for the second node to perform the measurement operation, and the timing offset is an amount of time adjusted by the second node to perform the measurement operation, in particular, a timing offset value based on the timing adjustment communicated by the second node with the first node, e.g., the second node is adjusted based on the timing of receiving the reference signal transmitted upstream of the first node.

Further, the first time configuration information includes a first occurrence time, a first valid time, and a first timing offset, where the first valid time is a valid time for the second node to measure the reference signal, and the timing offset is an amount of time adjusted by the second node to measure the reference signal.

Further, the second time configuration information includes a second occurrence time, a second effective time, and a second timing offset, where the second effective time is an effective time for the second node to measure the time-frequency resource, and the second timing offset is an amount of time adjusted by the second node to measure the time-frequency resource.

In one embodiment, the validity period includes one or more of:

effective measurement duration, starting point, offset. In one embodiment, whether the time limit is on indicates whether the second node can average over multiple measurement periods when performing measurement operations.

Specifically, if the time limit is turned on, the second node is indicated not to be averaged over a plurality of measurement periods when performing the measurement operation. Specifically, if the time limit is not turned on, the second node is instructed to perform the measurement operation, and the measurement operation may be averaged over a plurality of measurement periods. In one embodiment, the quasi co-located reference signal indicates that the second node reference signal measurement configuration information and the quasi co-located reference signal satisfy a quasi co-located relationship. The quasi co-location reference signal indicates that the second node time frequency resource measurement configuration information and the quasi co-location reference signal satisfy a quasi co-location relationship.

For example, the CSI-RS and the quasi co-located reference signal satisfy a quasi co-located relationship with respect to at least one of the following parameters: 1) doppler shift 2) doppler spread 3) average delay 4) delay spread 5) spatial reception parameters.

In one embodiment, the measurement results include: the first measurement configuration information corresponds to the received power of the resource, the first measurement configuration information and the second measurement configuration information correspond to the received power of the resource, the path loss value corresponding to the first measurement configuration information, the path loss value corresponding to the resource, and the link quality between the second node and the first node, which is measured in the second measurement configuration information.

In one embodiment, the received power satisfies one of the following conditions:

the signal receiving power of the first measurement configuration information is greater than or equal to a first threshold value;

the signal receiving power of the first measurement configuration information is less than or equal to a second threshold value;

the ratio of the signal receiving power of the first measurement configuration information to the signal receiving power of the first node for transmitting data upstream is greater than or equal to a third threshold value;

the ratio of the signal received power of the first measurement configuration information to the signal received power of the first node transmitting data upstream is less than or equal to the fourth threshold.

In one embodiment, the path loss value satisfies one of the following conditions:

the path loss value corresponding to the signal of the first measurement configuration information is greater than or equal to a fifth threshold value;

the path loss value corresponding to the signal of the first measurement configuration information is less than or equal to a sixth threshold value;

the ratio of the path loss value corresponding to the signal of the first measurement configuration information to the path loss value between the second node and the first node is greater than or equal to a seventh threshold value;

and the ratio of the path loss value corresponding to the signal of the first measurement configuration information to the path loss value between the second node and the first node is less than or equal to an eighth threshold value.

The link quality of the second node and the first node measured in the second measurement configuration information is less than or equal to a ninth threshold value.

The link quality of the second node and the first node measured in the second measurement configuration information is greater than or equal to a tenth threshold value.

In one embodiment, the first node is an integrated access and backhaul IAB node and the second node is a parent node of the IAB node or the second node is a child node of the IAB node.

In one embodiment, in a case where the second node is a parent node of the IAB node, after receiving the measurement result sent by the second node, the method further includes:

selecting a beam combination satisfying requirements based on the measurement results to perform simultaneous transmission upstream and downstream.

The IAB node performs both downstream and upstream transmissions, with the downstream transmissions avoiding beams interfering with the parent node.

In one embodiment, in a case that the second node is a child node of the IAB node, after the receiving the measurement result sent by the second node, the method further includes:

selecting a beam combination satisfying requirements based on the measurement results to perform simultaneous upstream and downstream reception.

The IAB node performs downstream reception and upstream reception simultaneously, with upstream reception of a corresponding transmission avoiding interference with downstream reception.

In an embodiment, a multiplexing method is provided, and the multiplexing method is applied to a second node, as shown in fig. 3, the multiplexing method provided in the embodiment of the present application mainly includes steps S21 and S22.

S21, receiving measurement configuration information sent by a first node, wherein the measurement configuration information is used for indicating a second node to measure relevant information of resources corresponding to the measurement configuration information;

and S22, sending the measurement result to the first node.

In this embodiment, the first node is an IAB node as shown in fig. 1. The second node is a parent node as shown in fig. 1. Alternatively, the second node is a child node or UE as shown in fig. 1. In this embodiment, the parent node needs to perform measurement based on the measurement configuration information, and the amount that the parent node needs to measure includes at least one of the following: reference Signal Received Power (RSRP), target link quality, path loss value, Signal to Interference Ratio (SIR).

The RSRP may be an RSRP of a reference signal in the measurement configuration information, or an RSRP of a reference signal (e.g., SRS, DMRS, CSI-RS, etc.) transmitted upstream by the IAB node.

The path loss value is a path loss value corresponding to a reference signal measured by the father node according to the resource in the measurement configuration information, or a path loss value between the IAB node and the father node measured by the father node.

In one embodiment, the measurement configuration information includes first measurement configuration information and second measurement configuration information, where the measurement configuration information includes reference signal configuration information for the second node to measure a reference signal, or the measurement configuration information includes time-frequency resource configuration information for the second node to measure a time-frequency resource. The second measurement configuration information includes the second node measurement corresponding quasi co-located reference signal configuration information or corresponding spatial reception parameters. In one embodiment, in a case that the measurement configuration information includes reference signal configuration information for the second node to measure the reference signal, the reference signal configuration information includes one or more of:

In one embodiment, the type of the reference signal includes one or more of:

channel state information reference signal CSI-RS, synchronous broadcast block SSB, control channel reference signal PDCCH DMRS, traffic channel reference signal PDSCH DMRS. In one embodiment, in case that the measurement configuration information includes time-frequency resource configuration information for the second node to measure time-frequency resources, the time-frequency resource configuration information includes one or more of the following:

In one embodiment, the time configuration information includes one or more of: an opportunity, an effective time, and a timing offset occur, wherein the effective time is an effective time for the second node to perform the measurement operation, and the timing offset is an amount of time adjusted by the second node to perform the measurement operation. In particular, the second node adjusts based on a timing offset value of a timing adjustment of communication of the second node with the first node, e.g., based on a timing of receiving a reference signal transmitted upstream of the first node.

In one embodiment, the validity period includes one or more of:

In one embodiment, an IAB node is provided that reports to a parent node a Channel State Information Reference Signal (CSI-RS) that requires the parent node to measure.

The IAB nodes may interfere with each other when performing upstream and downstream transmissions simultaneously. For example, an IAB node downstream transmission interferes with the parent node's reception of the IAB node's upstream transmission. To solve the above problems, the following solutions are given.

The IAB node reports the measurement configuration information to the father node, the father node performs measurement according to the measurement configuration information, and the father node feeds back a measurement result to the IAB node.

When the IAB node performs upstream transmission and downstream transmission simultaneously, the downstream transmission uses a beam with little interference to the parent node.

Specifically, the measurement configuration information includes one or more resource sets, and each resource set includes one or more reference signal resource configuration information.

The reference signal resource configuration information includes at least one of: time configuration information, frequency domain configuration information, sequence configuration information, transmission power configuration information, corresponding quasi co-located reference signal configuration information or corresponding spatial receiving parameters.

The Reference Signal may be any of CSI-RS, Synchronization Signal Block (SSB), Demodulation Reference Signal (DMRS), Phase Tracking Reference Signal (PTRS), or the like.

The quantity that the parent node needs to measure includes at least one of: reference Signal Received Power (RSRP), target link quality, path loss value, Signal to interference ratio (SIR).

The target link Quality is the link Quality of the parent node Receiving the upstream transmission of the IAB node, and includes the Reference Signal Receiving Quality (RSRQ), the Signal to Interference plus Noise Ratio (SINR) of the Reference Signal, or the Channel Quality Indication (CQI) of the Reference Signal.

The SIR is a ratio of Ps, which is a parent node measuring the received power of a reference signal transmitted upstream of the IAB node, and Pi, which is a parent node measuring the received power of a reference signal transmitted downstream of the IAB node. The power is expressed in dB values, so the ratio of the powers corresponds to the difference in dB values.

The measurement result fed back by the parent node to the IAB node comprises at least one of the following: the resource index, the receiving power of the corresponding resource, the path loss of the corresponding resource, and the RSRP of the corresponding resource, the parent node receives the RSRQ or SINR or CQI of the reference signal sent by the IAB node upstream, and the parent node receives the SINR of the reference signal sent by the IAB node upstream.

The parent node determines the measurement result based on at least one of: feeding back quantities that satisfy a threshold condition; the feedback is of an amount that satisfies a threshold condition and one or more associated measured quantities.

Specifically, the time allocation information of the reference signal resource allocation information includes at least one of the following: the period of the reference signal, the time offset of the reference signal, the effective measurement time of the reference signal, and the timing offset between the downstream transmission of the IAB node and the upstream transmission of the IAB node.

As shown in fig. 4, the period of the reference signal (denoted as P) is that the IAB node transmits the reference signal with the period P. As shown in fig. 5, the time offset of the reference signal refers to a time offset with the beginning of the period P as a boundary, and the time offset may be at least one of a number of radio frames, a number of subframes, a number of slots, and a number of OFDM symbols. As shown in fig. 6, the valid measurement duration of the reference signal indicates a valid time for the parent node to perform the reference signal measurement. If the IAB node does not send the reference signal or the beam is changed or the transmission power is changed outside the effective time, the IAB node informs the effective time of the parent node to execute the reference signal measurement.

The timing offset of the reference signal from the transmission upstream of the IAB node is the time offset between the transmission timing of the reference signal downstream of the IAB node and the transmission timing upstream of the IAB node. The timing offset is a number of OFDM symbols or a number of time domain samples (Tc or Ts) or a number of OFDM symbols and a number of time domain samples. As shown in fig. 7, there may be a timing offset between the IAB node upstream transmission and the IAB node downstream transmission. The IAB reports the reference signal to be measured to the father node, and the IAB reports the timing deviation between the upstream transmission of the IAB and the downstream transmission of the IAB to the father node, wherein the deviation amount is the difference between the upstream transmission time of the IAB and the downstream transmission time of the IAB or the difference between the downstream transmission time of the IAB and the upstream transmission time of the IAB. And the father node measures the reference signal to be measured reported by the IAB node by taking the timing sent by the upstream of the IAB node as a reference and then or by taking the timing offset in advance.

The frequency domain configuration information of the reference signal resource configuration includes at least one of: carrier information of the reference signal, a bandwidth occupied by the reference signal, a frequency domain density of the reference signal, a subcarrier spacing of the reference signal, and a frequency domain offset of the reference signal.

The Carrier information of the reference signal is an absolute Carrier number or a Carrier offset of a Carrier corresponding to the IAB node MT and a Carrier of the reference signal to be measured, and the Carrier offset is the RB number or the Subcarrier Carrier (SC) number or the Resource Block (RB) RB number and the SC number.

The frequency domain offset of the reference signal refers to an offset of the reference signal within the RB.

The RB size and SC size of the carrier offset are determined by the reference subcarrier spacing (reference SC), e.g., the reference subcarrier is 15 × 2^ u, u is a natural number greater than or equal to 0. u may be a value agreed between nodes, or a value used in a communication process between the parent node and the IAB node, or a value notified to the parent node by the IAB node or the OAM or CU.

The reference signal sequence configuration information includes at least one of: sequence type of reference signal, reference signal sequence generation mode.

The reference signal sequence generation method includes a sequence generation method for generating a reference signal and an initialization parameter, for example, the sequence generation method and initialization of the CSI-RS are as follows:

the method comprises the steps of generating a random sequence, determining an initial value of the random sequence, generating a reference signal sequence according to the random sequence as shown in a formula III, and generating an initial value for sequence generation as shown in a formula IV. The sending party and the measuring party can agree on a generation mode of a random sequence, and the IAB node does not need to report the generation mode of the sequence for a father node; if the sender and the measuring party agree on a generation mode of the initial sequence value, the IAB node does not need to report the generation mode of the initial sequence value for the father node; if the time of the IAB node upstream transmission and the IAB node downstream transmission are aligned, the parent node may determine the time-dependent variable of the sequence initialization value according to its own timing. In the formula, the number of the OFDM symbol in the slot is the number of the slot in one wireless frame. And is a variable that further configures the sequence for interference randomization or quasi-orthogonal multi-user transmission.

As shown in fig. 8, if a centralized Control Unit (CU) or an Operation and Maintenance Administration (OAM) of the wireless network designates the CSI-RS configuration of the IAB node for the parent node, the IAB node does not need to inform the parent node of the mapping position of the CSI-RS of the IAB node, the IAB node reports the index number of the corresponding resource to the parent node, and the parent node can determine the position of the resource to be measured.

The transmission power of the reference signal is the transmission power of the reference signal sent by the IAB node downstream.

And the father node measures a reference signal in the resource set of the measurement configuration reported by the IAB node or a reference signal sent by the upstream of the IAB node according to a receiving beam corresponding to the resource set of the measurement configuration reported by the IAB node, and if the reference signal configuration of the measurement configuration reported by the IAB node does not contain the corresponding quasi co-location reference signal configuration or the corresponding space receiving parameter, the father node carries out corresponding measurement according to the historical receiving parameter of the IAB node. The measured quantity includes at least one of: RSRP, RSRQ, SINR, path loss, SIR.

And the father node feeds back the resource set index corresponding to the measurement quantity meeting the threshold to the IAB node. Wherein the threshold is satisfied by at least one of: the measured quantity is greater than or equal to a specific threshold, the measured quantity is less than or equal to the specific threshold, the measured quantity is greater than the specific threshold, and the measured quantity is less than the specific threshold.

And the parent node measures the RSRP of the reference signals in the resource set and records the RSRP _ i, the parent node feeds back a resource set index corresponding to the RSRP _ i meeting the threshold to the IAB node, and the threshold corresponding to the RSRP _ i is recorded as threshold _ 1. The RSRP _ i may be an average value of RSRP of reference signals of different resources in one resource set, or a minimum value of RSRP of reference signals of different resources in one resource set, or a maximum value of RSRP of reference signals of different resources in one resource set. Optionally, the parent node feeds back the RSRP _ i value meeting the threshold to the IAB node.

The parent node measures the channel quality of a reference signal transmitted upstream of the IAB node, which may be characterized by one of the following quantities: RSRQ, SINR and CQI, wherein corresponding measurement results are respectively recorded as RSRQ _ s, SINR and CQI, a parent node feeds back indexes of resource sets corresponding to the measurement results meeting a threshold to the IAB node, and the threshold corresponding to the RSRQ _ s or the SINR or the CQI is recorded as threshold _ 2. Optionally, the parent node feeds back the RSRQ _ s value, SINR value, or CQI value satisfying the threshold to the IAB node.

And measuring the path loss value of the reference signal in the resource set by the father node as PL _ i, feeding back a resource set index corresponding to the PL _ i meeting the threshold to the IAB node by the father node, and recording the threshold corresponding to the RSRP _ i as threshold _ 3. PL _ i may be an average value of reference signal path losses of different resources in one resource set, or when the parent node feeds back a resource set index corresponding to a path loss greater than or equal to a threshold, the path loss value may also be a minimum value of reference signal path losses of different resources in one resource set, or when the parent node feeds back a resource set index corresponding to a path loss less than or equal to a threshold, the path loss value may also be a maximum value of reference signal path losses of different resources in one resource set. Optionally, the parent node may feed back the RSRP _ i value satisfying the condition to the IAB node.

The parent node measures the path loss value corresponding to the reference signal sent by the upstream of the IAB node and is denoted as PL _ s, the parent node measures the path loss value of the reference signal in the resource set and is denoted as PL _ i, and the ratio of PL _ s and PL _ i is denoted as SIR _ PL _ s/PL _ i. And the parent node feeds back the resource set index corresponding to the SIR _ PL meeting the threshold to the IAB node, and the threshold corresponding to the SIR _ PL is recorded as threshold _ 4. Optionally, the parent node may feed back to the IAB node the SIR _ PL value that satisfies the threshold.

The parent node measures the signal received power corresponding to the reference signal transmitted upstream from the IAB node and marks as Ps, for example, the parent node measures the SRS signal received power transmitted upstream from the IAB node. The signal received power of the reference signal in the parent node measurement resource set is recorded as Pi, the ratio of Ps to Pi is recorded as measurement SIR which is equal to Ps/Pi, the parent node feeds back the resource set index corresponding to the SIR meeting the threshold to the IAB node, and the threshold corresponding to the SIR is recorded as threshold _ 5. Optionally, the parent node may feed back the SIR value that satisfies the threshold to the IAB node.

When the feedback result received by the IAB node from the parent node is one or a combination of the following conditions, the IAB node considers that the IAB downstream transmission corresponding to the resource set index causes interference to the parent node reception:

the parent node feedback RSRP _ i is larger than or equal to the resource set index corresponding to the threshold _ 1;

the parent node feeds back resource set indexes corresponding to RSRQ _ s or SINR or CQI less than or equal to threshold _2

The parent node feeds back a resource set index corresponding to the PL _ i smaller than or equal to the threshold _ 3;

the parent node feeds back a corresponding resource set index with SIR _ PL less than or equal to threshold _ 4;

the parent node feeds back a corresponding resource set index whose SIR is less than or equal to threshold _ 5.

When the feedback quantity of the IAB node received by the parent node is one of the following situations or a combination of the situations, the IAB node considers that the IAB downstream transmission of the corresponding resource set index does not cause interference to the parent node reception:

the parent node feedback RSRP _ i is less than or equal to the resource set index corresponding to the threshold _ 1;

the parent node feeds back resource set indexes corresponding to RSRQ _ s or SINR or CQI which are more than or equal to threshold _ 2;

the parent node feeds back the resource set index corresponding to the PL _ i greater than or equal to the threshold _ 3;

feeding back a resource set index corresponding to SIR _ PL (signal to interference ratio) less than or equal to threshold _4 by the father node;

The SIR or SIR _ PL is defined as a ratio of two quantities, and if the two values compared are dB values, the two quantities used to calculate SIR or SIR _ PL are subtracted to obtain the ratio.

The IAB node receives the measurement result fed back by the parent node, and can determine that the IAB node sends a wave beam causing interference to the parent node downstream.

The IAB node simultaneously executes downstream transmission and upstream transmission, and the IAB node selects a corresponding beam for the downstream transmission so that the downstream transmission of the IAB node does not interfere with the parent node or the downstream transmission of the IAB node generates less interference to the parent node.

The signal type of the measurement configuration is not limited to CSI-RS, and may also be SSB, DMRS, PTRS, or other signals.

The foregoing describes only a particular embodiment of the present invention and extensions to this embodiment including the following are also within the scope of the present application.

In one embodiment, a beam reporting capability (DU is multi-beam capable) is provided for the IAB node, and the parent node configures CSI-RS of the IAB node DU for the IAB node.

In this embodiment, the IAB node reports to the parent node that its DU multi-Beam capability is n _ Simul _ Beam, where n _ Simul _ Beam represents the number of beams that the IAB node DU unit can transmit at the same time.

Or the IAB node reports the number of SRSset or the number of SRS resources included in the SRSset to the father node. And the father node determines the number of the beams simultaneously transmitted by the DU according to the report of the IAB node.

The father node learns that the DU unit of the IAB node can simultaneously send n _ Simul _ Beam beams, and the father node configures a CSI-RS resource set for the IAB node DU by using the CSI-RS resource configuration method described in the above embodiment. When configuring the CSI-RS Resource sets for the IAB node, at most N _ Simul _ Beam CSI-RS resources may be configured on the same time Resource, for example, if the parent node configures N CSI-RS resources for the IAB node, which are denoted as CSI-RS-Resource-set-1 to CSI-RS-Resource-set-N, where N > N _ Simul _ Beam, then the parent node should configure at most N _ Simul _ Beam CSI-RS Resource sets on the same time Resource, and the parent node should configure at least ceil (N/N _ Simul _ Beam) time domain resources for these CSI-RS Resource sets. Where ceil () represents a ceiling operation.

Or a centralized Control Unit (CU) or operation and Maintenance administration (OAM) of the network configures the CSI-RS resource for the IAB node DU and notifies the parent node of the CSI-RS resource configuration for the IAB node DU through F1 signaling or through OAM.

The parent node configures the SRS resource set for the IAB node. And the father node configures the corresponding relation between the CSI-RS resource set and the SRS resource set for the IAB node. And the IAB node simultaneously performs downstream transmission and upstream transmission on beams corresponding to the SRS resource set and beams corresponding to the CSI-RS resource set or quasi-co-location configuration of the SRS resource set and the CSI-RS resource set based on the corresponding relation. The set of SRS resources is a set of channel measurement resources, and the set of CSI-RS resources is a set of interference measurement resources.

The parent node measures the CSI-RS signal receiving power sent by the child node downstream, the parent node measures the SRS signal receiving power sent by the child node upstream, and the parent node feeds back the measured value to the IAB node. The parent node further feeds back the time domain resource corresponding to the CSI-RS resource set as granularity according to the method of the embodiment.

The parent node feeds back one or the combination of the following signals that the parent node measures the interference transmitted by the IAB node at the corresponding time domain resource index:

feeding back time domain resource indexes corresponding to one or more CSI-RS resources with the RSRP _ i greater than or equal to the threshold _1 by the father node;

feeding back time domain resource indexes corresponding to one or more CSI-RSresource sets with the RSRQ _ s or SINR or CQI less than or equal to a threshold-2 by the father node;

feeding back time domain resource indexes corresponding to one or more CSI-RS resource sets with PL _ i less than or equal to threshold _3 by the father node;

feeding back time domain resource indexes corresponding to one or more CSI-RS resources with SIR _ PL less than or equal to threshold-4 by a father node;

and the parent node feeds back time domain resource indexes corresponding to one or more CSI-RS resource sets with SIR less than or equal to threshold-5.

The parent node feeds back one or a combination of the following conditions that the IAB node considers that the corresponding time domain resource index does not measure that the IAB downstream transmission causes interference to the parent node:

feeding back time domain resource indexes corresponding to one or more CSI-RS resources with the RSRP _ i less than or equal to the threshold _1 by the father node;

feeding back time domain resource indexes corresponding to one or more CSI-RSresource sets with the RSRQ _ s or SINR or CQI more than or equal to the threshold-2 by the father node;

feeding back a time domain resource index corresponding to one or more CSI-RS resource sets with PL _ i greater than or equal to threshold _3 by a father node;

The SIR or SIR _ PL is defined as a ratio of two quantities, and if the two quantities compared are dB values, the two quantities used to calculate SIR or SIR _ PL are subtracted to obtain the ratio.

When the IAB node performs downstream transmission and upstream transmission simultaneously, the downstream transmission avoids using a beam that causes interference to the parent node, or the downstream transmission employs a beam that causes less interference to the parent node.

The IAB node receiving the feedback from the parent node may determine that the IAB node transmits a beam downstream of the parent node that causes interference to the parent node.

The parent node configures the interference measurement set for the IAB node, and the interference measurement set is not limited to CSI-RS, but may also be signals such as SSB, DMRS, PTRS, and the like.

In one embodiment, on the basis of the above embodiments, the measurement beam is refined: subdividing resource feedback within CSI-RS resource set.

The IAB reports the CSI-RS which needs to be measured by the father node to the father node, and the IAB reports a set of CSI-RS resource sets to the father node. The CSI-RS resource set contains one or more CSI-RS resources. The specific reporting manner is as the method provided in the foregoing embodiment, and details are not described in this embodiment.

And the father node measures according to each CSI-RS resource in the CSI-RS resource set reported by the IAB node and feeds back the measured value to the IAB node. The parent node feeds back to the IAB node based on the granularity of CSI-RS resources.

The parent node feeds back one or the combination of the following interference which represents that the parent node measures the downstream transmission interference of the IAB node at the CSI-RS resource index of the corresponding CSI-RS resource set index:

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the RSRP _ i greater than or equal to the threshold _1 by the father node;

the parent node feeds back CSI-RSResource set indexes and CSI-RS resource indexes corresponding to RSRQ _ s or SINR or CQI which are less than or equal to threshold _ 2;

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the threshold _3 by the parent node, wherein the PL _ i is less than or equal to the threshold;

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the SIR _ PL less than or equal to the threshold _4 by the father node;

and the parent node feeds back the CSI-RS resource set index and the CSI-RS resource index corresponding to the SIR less than or equal to the threshold-5.

When the parent node feeds back one or a combination of the following conditions, the IAB node considers that the downstream transmission corresponding to the corresponding time domain resource index does not cause large interference to the parent node:

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the RSRP _ i less than or equal to the threshold _1 by the father node;

the parent node feeds back a CSI-RSResource set index and a CSI-RS resource index corresponding to the RSRQ _ s or SINR or CQI which is more than or equal to the threshold _ 2;

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the threshold _3 by the parent node, wherein the PL _ i is greater than or equal to the threshold;

The IAB node receives the measurement value fed back by the parent node, and can determine the CSI-RSResource set index and the CSI-RSResource index which cause interference to the parent node or can determine the CSI-RS Resource set index and the CSI-RS Resource index which do not cause obvious interference to the parent node, when the IAB node simultaneously performs downstream transmission and upstream transmission, the downstream transmission of the IAB node avoids using a beam which causes interference to the parent node, or the downstream transmission adopts a beam which does not cause interference or has small interference to the parent node.

Alternatively, different CSI-RS resources of a CSI-RS resource set may correspond to different time domain locations. The CSI-RS transmitted downstream of the IAB node may be TDM transmitted using respective beams. The parent node can measure the interference of the IAB downstream transmission to the parent node at different time, the parent node feeds back the measured value according to the method, and the IAB downstream transmission avoids adopting a beam which causes the interference to the parent node when the IAB simultaneously executes the downstream transmission and the upstream transmission. Because different CSI-RS resources of the CSI-RS resource sets correspond to different time resources, the method can achieve the purpose that the parent node measures interference measurement of the IAB downstream transmission to the parent node by the IAB node executing the downstream transmission in the respective beam directions at different time in the scene that the IAB downstream transmission does not have the multi-beam simultaneous transmission capability. The IAB node receives the feedback of the father node, and the IAB node can determine that the downstream of the IAB node sends the wave beam which causes interference to the father node, or the IAB node determines that the downstream of the IAB node sends the wave beam which does not cause interference to the father node. Therefore, when the IAB node performs downstream transmission and upstream transmission at the same time, the downstream transmission avoids using a beam causing interference to the parent node, or the downstream transmission adopts a beam causing less interference to the parent node.

When the IAB node configures only one CSI-RS resource set for the parent node, the parent node may only feed back resource numbers within the set based on the feedback.

In one embodiment, the measurement beam is refined on the basis of the above-described embodiments.

The IAB node reports the CSI-RS resource sets to be measured in the manner of the above embodiment, where one CSI-RS resource set corresponds to one or more CSI-RS resources.

The parent node makes measurements for the CSI-RS resource set index and the CSI-RS resource. One resource may include one or more reference signal port. The parent node measures each reference signal port in resource indexed by the CSI-RS resource set. Based on the above embodiments, the present embodiment uses the port as the granularity feedback. The feedback method adopts the specific method described in the above embodiment. This embodiment is not described in detail.

The parent node feeds back one or the combination of the following items to indicate that the parent node measures the interference transmitted downstream from the IAB node at the corresponding CSI-RS resource set index, CSI-RS resource index and reference signal port index:

feeding back a CSI-RS resource set index, a CSI-RS resource index and a reference signal port index of which the RSRP _ i is greater than or equal to a threshold _1 by a father node;

feeding back a CSI-RS resource index, a CSI-RS resource index and a reference signal port index of which RSRQ _ s or SINR or CQI is less than or equal to a threshold _2 by a father node;

feeding back a CSI-RS resource set index, a CSI-RSresource index and a reference signal port index of which the PL _ i is less than or equal to a threshold _3 by a father node;

feeding back a CSI-RS resource set index, a CSI-RS resource index and a reference signal port index of which SIR _ PL is less than or equal to a threshold _4 by a father node;

and the parent node feeds back the CSI-RS resource set index, the CSI-RSresource index and the reference signal port index with SIR less than or equal to threshold-5.

When the parent node feeds back one or a combination of the following conditions, the IAB node considers that the downstream transmission corresponding to the CSI-RS resource set index, the CSI-RS resource index and the reference signal port index does not cause large interference to the parent node:

feeding back a CSI-RS resource set index, a CSI-RS resource index and a reference signal port index of which the RSRP _ i is less than or equal to a threshold _1 by a father node;

feeding back a CSI-RS resource index, a CSI-RS resource index and a reference signal port index of which RSRQ _ s or SINR or CQI is more than or equal to a threshold _2 by a father node;

feeding back a CSI-RS resource set index, a CSI-RSresource index and a reference signal port index of which the PL _ i is greater than or equal to a threshold _3 by a father node;

The IAB node receives the measurement value fed back by the parent node, and can determine a CSI-RS resource set index, a CSI-RS resource index and a reference signal port index which cause interference to the parent node or can determine a CSI-RS resource set index, a CSI-RS resource index and a reference signal port index which do not cause interference to the parent node.

When the IAB node configures only one CSI-RS resource set for the parent node, the parent node may only feed back the corresponding resource number and the corresponding port in the set based on the feedback. Further, when the IAB node configures only one CSI-RS resource set for the parent node and the resource set has only one resource, the parent node may only feed back the corresponding port in the set based on the feedback.

In one embodiment, an IAB node requests SRS resources from a parent node, the IAB node configures incidence relation between the SRS resources and downstream CSI-RS resources of the IAB node to a child node or UE, the child node or UE performs measurement, and the child node or UE reports the measurement value to the IAB node. The IAB node receives the reported value of the child node or the UE, and avoids adopting a beam causing interference to the child node or the UE for upstream transmission when the IAB node simultaneously executes upstream transmission and downstream transmission.

An IAB node upstream transmission may cause interference to a recipient child node or UE of an IAB node downstream transmission. The IAB node may configure SRS for a child node or UE.

The IAB node requests the parent node for IAB upstream transmission of reference signal resources. Preferably, the IAB node requests a periodic SRS from the parent node.

The IAB node configures measurement configuration for the child node or UE.

Wherein the measurement configuration information comprises one or more resource sets, each resource set comprising one or more reference signal resource configurations;

the reference signal resource configuration includes at least one of: time allocation, frequency domain allocation, sequence allocation, transmitting power, quasi co-location reference signal allocation and receiving beam indication.

The reference signal may be SRS or DMRS;

the measurement results include at least one of: RSRP, target link quality, path loss, SIR.

The RSRP may be RSRP of a reference signal in a measurement configuration measured by the UE or the sub-node, or RSRP of a reference signal (such as CSI-RS, SSB, DMRS, PTRS and the like) sent downstream of the IAB node measured by the UE or the sub-node

The target link quality is that the UE or the sub-node measures the RSRQ or SINR or CQI of a reference signal sent downstream of the IAB node

The SIR is the ratio of Ps, which is the received power of the reference signal transmitted downstream of the IAB node measured by the UE or the sub-node, and Pi, which is the received power of the reference signal transmitted upstream of the IAB node measured by the UE or the sub-node. Power is often expressed in dB values, so the ratio of power corresponds to the difference in dB values.

The path loss is the path loss measured by the UE or the child node according to the resources in the measurement configuration, or the path loss measured between the IAB node and the UE or the child node by the UE or the child node.

The feedback quantity of the UE or the sub-node to the IAB node comprises at least one of the following: the resource index, the path loss of the corresponding resource and the RSRP of the corresponding resource, the father node receives the RSRQ of the reference signal sent by the upstream of the IAB node, and the father node receives the SINR of the reference signal sent by the upstream of the IAB node.

The IAB node performs downstream transmission and upstream transmission simultaneously with its downstream transmission avoiding a beam that interferes significantly with the parent node.

The measurement configuration configured by the IAB node for the UE or a child node includes one or more SRS resource sets.

The SRS resource set includes one or more SRS resource configurations, or the SRS resource set includes one or more SRS resource configurations and a reception beam indication corresponding to the SRS resource set. One SRS resource configuration includes one or a combination of the following:

frequency domain configuration of SRS resources;

sequence configuration of SRS resources;

time configuration of SRS resources;

the transmit power of the SRS;

configuring SRS resource quasi-co-located reference signals;

the SRS resource receives the beam indication.

The frequency domain configuration includes at least one of: bandwidth occupied by the reference signal, frequency domain density of the reference signal, subcarrier spacing of the reference channel, and frequency domain offset of the reference signal.

The sequence configuration of the SRS resource includes at least one of: the sequence type of the reference signal and the generation mode of the reference signal sequence.

The time configuration includes at least one of: the period of the SRS, the time offset of the SRS, the effective measurement time of the SRS, the timing offset (timing offset to be refined) between the SRS signal and the IAB node downstream transmission, and whether the time limit is on.

The period of SRS (denoted as P) refers to that the IAB node transmits the reference signal periodically with P, as shown in fig. 4. The time offset of the reference signal refers to a time offset with the beginning of the period P as a boundary, and the time offset may be at least one of a plurality of radio frames, a plurality of subframes, a plurality of slots, and a plurality of OFDM symbols, as shown in fig. 5. The valid measurement time of the reference signal indicates a valid time for the parent node to perform the reference signal measurement. For example, if the IAB node does not transmit the reference signal or the beam is changed or the power of the reference signal is changed, the sub-node or UE should not measure the reference signal at these time domain positions, and therefore the effective time for instructing the sub-node or UE to perform the measurement is shown in fig. 6.

The transmission power of the reference signal is the transmission power of the reference signal sent by the IAB node upstream.

And the UE or the sub-node measures the reference signal of the IAB node according to the receiving beam of the resource set configured by the measurement of the IAB node. And if the resource set configured by the measurement of the IAB node does not contain the receiving beam, the UE or the child node carries out corresponding measurement according to the history receiving beam communicated with the IAB node.

And the UE or the child node feeds back the resource set index corresponding to the measurement quantity meeting the threshold to the IAB node. Wherein the threshold is satisfied by at least one of: the measurement quantity is greater than or equal to a specific threshold, the measurement quantity is less than or equal to the specific threshold, the measurement quantity is greater than the specific threshold, and the measurement quantity is less than the specific threshold.

The RSRP of the reference signal in the resource set is measured by the UE or the sub-node and is recorded as RSRP _ i, the resource set index corresponding to the RSRP _ i meeting the threshold is fed back to the IAB node by the UE or the sub-node, and the threshold corresponding to the RSRP _ i is recorded as threshold _ 1. The RSRP _ i may be an average value of RSRP of reference signals of different resources in one resource set, or a minimum value of RSRP of reference signals of different resources in one resource set, or a maximum value of RSRP of reference signals of different resources in one resource set. Optionally, the UE or the child node feeds back the RSRP _ i value meeting the threshold to the IAB node.

The UE or the sub-node measures the channel quality corresponding to the reference signal sent downstream by the IAB node, and the channel quality can be characterized by one of the following quantities: RSRQ, SINR and CQI, wherein the corresponding measurement quantities are respectively recorded as RSRQ _ s, SINR and CQI, the UE or the sub-node feeds back the index of the resource set corresponding to the measurement quantity meeting the threshold to the IAB node, and the threshold corresponding to the RSRQ _ s or the SINR or the CQI is recorded as threshold _ 2. Optionally, the UE or the child node feeds back the RSRQ _ s value, SINR value, or CQI value satisfying the threshold to the IAB node.

And measuring the path loss of the reference signal in the resource set by the UE or the sub-node as PL _ i, feeding back the index of the resource set corresponding to the measurement quantity meeting the threshold to the IAB node by the UE or the sub-node, and recording the threshold corresponding to the PL _ i as threshold _ 3. PL _ i may be an average value of reference signal path losses of different resources in one resource set, or when the UE or the child node feeds back a resource set index corresponding to a path loss greater than or equal to a threshold, the path loss may also be a minimum value of reference signal path losses of different resources in one resource set, or when the UE or the child node feeds back a resource set index corresponding to a path loss less than or equal to a threshold, the path loss may also be a maximum value of reference signal path losses of different resources in one resource set. Optionally, the UE or the child node may feed back the PL _ i value satisfying the threshold to the IAB node.

The UE or the sub-node measures the path loss corresponding to the reference signal sent by the IAB node upstream and records the path loss as PL _ s, the UE or the sub-node measures the path loss of the reference signal in the resource set and records the path loss as PL _ i, and the ratio of PL _ s and PL _ i is recorded as SIR _ PL which is PL _ s/PL _ i. And the UE or the child node feeds back the resource set index corresponding to the SIR _ PL meeting the threshold to the IAB node, and the threshold corresponding to the SIR _ PL is recorded as threshold _ 4. Optionally, the UE or the child node may feed back the SIR _ PL value satisfying the threshold to the IAB node.

The UE or the sub-node measures the signal received power corresponding to the reference signal sent downstream from the IAB node as Ps, for example, the UE or the sub-node measures the CSI-RS signal received power sent downstream from the IAB node. The UE or the sub-node measures the signal received power of the reference signal in the resource set and records Pi, the ratio of Ps to Pi is recorded as Ps/Pi, the UE or the sub-node feeds back the resource set index corresponding to the SIR meeting the threshold to the IAB node, and the threshold corresponding to the SIR is recorded as threshold _ 5. Optionally, the UE or the sub-node may feed back the SIR value satisfying the threshold to the IAB node.

When the feedback quantity of the UE or the child node received by the IAB node is one of the following situations or a combination of the situations, the IAB node considers that the IAB downstream transmission corresponding to the resource set index causes interference to the UE or the child node reception:

the UE or the sub-node feeds back a corresponding resource set index with the RSRP _ i more than or equal to the threshold _ 1;

resource set indexes corresponding to UE or sub-node feedback RSRQ _ i smaller than or equal to threshold _2

The UE or the child node feeds back the corresponding resource set index with PL _ i less than or equal to threshold _ 3;

the UE or the sub-node feeds back the corresponding resource set index with SIR _ PL less than or equal to threshold _ 4;

the UE or the sub-node feeds back the corresponding resource set index with SIR less than or equal to threshold _ 5.

When the feedback quantity of the UE or the child node received by the IAB node is one of the following situations or a combination of the situations, the IAB node considers that the IAB downstream transmission corresponding to the resource set index does not cause large interference to the reception of the UE or the child node:

the UE or the child node feeds back the resource set index corresponding to the RSRP _ i less than or equal to the threshold _ 1;

the UE or the sub-node feeds back the resource set index corresponding to the RSRQ _ i greater than or equal to the threshold _ 2;

the UE or the child node feeds back the resource set index corresponding to the PL _ i greater than or equal to the threshold _ 3;

the feedback SIR _ PL of the UE or the child node is less than or equal to the resource set index corresponding to the threshold _ 4;

The IAB node receiving feedback from the UE or the child node may determine that the IAB node transmits a beam upstream that causes interference to the UE or the child node.

The IAB node performs downstream transmission and upstream transmission simultaneously, and the upstream transmission avoids using a beam causing interference to the UE or the child node, or the upstream transmission adopts a beam causing less interference to the UE or the child node.

The signal type of the measurement configuration is not limited to CSI-RS, but may be SSB, DMRS, PTRS, or other signals.

The number of the SRS resources configured by the father node is the number of the SRS resources requested by the IAB node, or the number of the SRS resources configured by the father node is smaller than the number of the SRS resources requested by the IAB node.

In one embodiment, the IAB node requests the upstream receiving beam direction from the father node, and the parent configures the upstream receiving beam direction of the IAB node for the IAB node

The IAB node performs upstream reception and downstream reception at the same time, namely the IAB node receives the data transmitted by the parent node and also receives the data transmitted by the child node or the UE. The data sent by the father node corresponds to the upstream receiving operation of the IAB node, and the data sent by the child node or the UE corresponds to the downstream receiving operation of the IAB node.

As shown in fig. 9, the IAB node receives data of two links (downstream reception and upstream reception) at the same time, and the data transmitted by the parent node may interfere with the downstream reception.

The IAB node reports one or more receiving beam sets to a father node;

the parent node configures one or more receiving beam sets to the IAB node;

the parent node configuring the IAB node with the set of receive beams includes one of: one or more receive beams, a time corresponding to a receive beam, and a time corresponding to a set of receive beams.

When the IAB node executes downstream reception and upstream reception at the same time, the IAB node schedules the UE or the child node so that the transmitted data of the parent node generates little interference or no interference on the downstream reception of the IAB node; or the IAB node schedules the UE or the child node to enable the data transmitted by the UE or the child node to generate less interference or no interference on the upstream reception of the IAB node; or the IAB node schedules the UE or the child node to enable the data transmitted by the UE or the child node to generate little interference or no interference on the upstream reception of the IAB node and enable the data transmitted by the parent node to generate little interference or no interference on the downstream reception of the IAB node; .

The IAB node DU may measure on multiple receive beams in a time division manner using one or more receive beam measurements, or may measure data transmitted by a parent node or UE or a child node on multiple receive beams simultaneously if the IAB node has the capability of multi-beam simultaneous measurement.

For example, a father node configures a receiving beam set received upstream of the IAB node to the IAB node, and the receiving beam set is recorded as TCI-state-set-1 and TCI-state-set-2, where the time corresponding to the receiving beam of TCI-state-set-1 is time-TCI-state-set-1, and the time corresponding to the receiving beam of TCI-state-set-2 is time-TCI-state-set-2. The IAB node receives the configuration of the parent node and determines that the data sent by the parent node is received by adopting beams corresponding to the TCI-state-set-1 in the time corresponding to the time-TCI-state-set-1. Based on the configuration of the parent node, the IAB node schedules the UE or the child node within the time corresponding to time-TCI-state-set-1. Preferably, the IAB node schedules the UE or the sub-node to send data within the time corresponding to time-TCI-state-set-1 such that the transmission satisfies one or a combination of the following: the data sent by the UE or the child node has no interference or small interference to the upstream reception of the IAB node; the parent node's transmission has no or little interference to IAB node downstream reception.

Or, the parent node configures respective time for the receive beams of the receive beam set configured by the IAB node, and then the IAB node takes an intersection of the time corresponding to different receive beams to determine the receive beam corresponding to the time.

For example, the receiving beams of the receiving beam set 1 are beam 1 and beam 2, the time corresponding to the receiving beam 1 is t1, the time corresponding to the receiving beam 2 is t2, and the overlapping part of t1 and t2 is t-overlap. The IAB node may determine that the time to remove t-overlap in t1 corresponds to receive beam 1, receive beam 1 and receive beam 2 at t-overlap time, and receive beam 2 at t2 at the time to remove t-overlap. The IAB node schedules the UE or the child node according to the reception beam of the corresponding time. Based on the configuration of the parent node, the IAB node schedules the UE or child node for a time corresponding to t 1. Preferably, the IAB node schedules the UE or the sub-node to send data in the time corresponding to t-1 so that the transmission satisfies one or a combination of the following: the data sent by the UE or the sub-node has no interference or small interference to the upstream reception of the IAB node; the parent node's transmission has no or little interference to IAB node downstream reception.

In one embodiment, the IAB node requests the parent node for the upstream receive beam direction, and parent configures the IAB node for receiving the corresponding quasi co-located reference signal configuration or spatial receive parameters upstream of the IAB node.

As shown in fig. 1, the IAB node receives data of two links (downstream reception and upstream reception) at the same time, and the data transmitted by the parent node may interfere with the downstream reception.

The IAB node reports the measurement configuration to a father node;

the father node carries out measurement, and the father node feeds back a measurement result to the IAB node;

when the IAB node simultaneously executes upstream receiving and downstream receiving, the downstream sending adopts a beam with small interference to a father node.

The parent node configuring the IAB node with the set of receive beams includes one of: one or more quasi co-located reference signal configuration sets or spatial reception parameter sets, times corresponding to the quasi co-located reference signal configuration sets or spatial reception parameter sets, and times corresponding to the quasi co-located reference signal configuration sets or spatial reception parameter sets.

The IAB node DU may measure on multiple receive beams in a time division manner using one or more quasi-co-located reference signal configurations or spatial receive parameter measurements, or the IAB node may measure the transmitted data of the parent node or UE or child node on multiple receive beams simultaneously if the IAB node has the capability of multi-beam simultaneous measurement.

For example, the father node configures the spatial receiving parameters upstream of the IAB node as a receiving beam set, which is denoted as TCI-state-set-1 and TCI-state-set-2, to the IAB node, where the time corresponding to the receiving beam of TCI-state-set-1 is time-TCI-state-set-1, and the time corresponding to the receiving beam of TCI-state-set-2 is time-TCI-state-set-2. The IAB node receives the configuration of the parent node and determines that the data sent by the parent node is received by adopting beams corresponding to the TCI-state-set-1 in the time corresponding to the time-TCI-state-set-1. Based on the configuration of the parent node, the IAB node schedules the UE or the child node within the time corresponding to time-TCI-state-set-1. Preferably, the IAB node schedules the UE or the sub-node to send data within the time corresponding to time-TCI-state-set-1 such that the transmission satisfies one or a combination of the following: the data sent by the UE or the child node has no interference or small interference to the upstream reception of the IAB node; the parent node's transmission has no or little interference to IAB node downstream reception.

In one embodiment, the parent node applies for measuring the CSI-RS resource set or the CSI-RS resource on the basis of the above embodiments.

The CU or OAM informs the parent node of the CSI-RS resource configuration of the IAB node, wherein the CSI-RS resource configuration comprises at least one of the following: time, frequency domain, sequence, transmit power, quasi co-located reference signal configuration or spatial reception parameters, as described in the embodiments above. One index value corresponds to one CSI-RS resource set or one index value corresponds to one CSI-RS resource or corresponds to one or more ports in one CSI-RS resource. And the parent node requests the CSI-RS to be measured from the IAB node, and the parent node can request to measure different CSI-RS resources through the index value configured by the CSI-RS resources. The CU or OAM or IAB node notifies the parent node of the timing offset of the IAB node downstream transmission and the IAB node upstream transmission.

And the IAB node sends the corresponding CSI-RS according to the index value or the subset of the index value of the CSI-RS resource configuration requested by the parent node.

And the parent node measures CSI-RS resource sent by the IAB node, and feeds the measured value back to the IAB node. The parent node feeds back to the IAB node with CSI-RS resource granularity based on embodiment 1.

The parent node feeds back one or the combination of the following signals that the parent node transmits interference to the parent node at the CSI-RS resource index measurement of the corresponding CSI-RS resource set index to the IAB node downstream:

When the parent node feeds back one or a combination of the following conditions, the IAB node considers that the downstream transmission corresponding to the corresponding time domain resource index does not cause interference to the parent node:

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the RSRP _ i smaller than or equal to the threshold _1 by the father node;

the parent node feeds back the CSI-RSResource set index and the CSI-RS resource index corresponding to the RSRQ _ s or SINR or CQI which is greater than or equal to the threshold _ 2;

feeding back a CSI-RS resource set index and a CSI-RS resource index corresponding to the SIR _ PL which is less than or equal to the threshold _4 by the father node;

and the parent node feeds back the CSI-RS resource set index and the CSI-RS resource index corresponding to the SIR smaller than or equal to the threshold-5.

Alternatively, different CSI-RS resources of a CSI-RS resource set may correspond to different time domain locations. The CSI-RS transmitted downstream of the IAB node may be TDM transmitted using respective beams. The parent node can measure the interference of the IAB downstream transmission to the parent node at different time, the parent node feeds back the measured value according to the method, and the IAB downstream transmission avoids adopting a wave beam which causes the interference to the parent node when the IAB simultaneously executes the downstream transmission and the upstream transmission. Because different CSI-RS resources of the CSI-RS resource sets correspond to different time resources, the method can achieve the purpose of measuring the interference of the IAB downstream transmission of the parent node to the parent node by the IAB node executing the downstream transmission in the respective beam directions at different time in the scene that the IAB downstream transmission does not have the multi-beam simultaneous transmission capability. The IAB node receives the feedback of the father node, and the IAB node can determine that the downstream of the IAB node sends the wave beam which causes interference to the father node, or the IAB node determines that the downstream of the IAB node sends the wave beam which does not cause interference to the father node. Therefore, when the IAB node performs downstream transmission and upstream transmission simultaneously, the downstream transmission avoids using a beam causing interference to the parent node, or the downstream transmission adopts a beam causing less interference to the parent node.

In one implementation, a parent node configures an IAB node with a correspondence between one SRS resource and one or more CSI-RS resources, wherein the IAB node is capable of transmitting the one SRS resource and the one or more CSI-RS resources simultaneously. For example, an intersection of the SRS resource and the time domain resource occupied by the one or more CSI-RS resources may be non-null.

In an actual configuration process, time domain resources occupied by the SRS resource and the one or more CSI-RS resources may not necessarily overlap, but a transmission beam corresponding to the SRS resource and a transmission beam corresponding to the one or more CSI-RS resources may be simultaneously transmitted by the IAB node, that is, the IAB node has the capability of transmitting the SRS resource and the one or more CSI-RS resources on the same time domain resource. The intersection between the SRS resource and the time domain resource occupied by the one or more CSI-RS resources may be non-empty or empty only for interference or power considerations during the measurement phase.

Further, the SRS resource is a channel measurement resource, and the CSI-RS resource is an interference measurement resource.

Further, the SRS resource and the CSI-RS resource are both measurement resources to be transmitted by the IAB node;

further, as shown in fig. 10, the SRS resource is an uplink sounding reference signal on a link corresponding to the IAB node MT, and the CSI-RS resource is a sounding reference signal on a link corresponding to the DU.

Further, the parent node configures one or more corresponding CSI-RS resources for different SRS resource configurations, respectively.

Further, the ID corresponding to the SRS resource and each CSI-RS resource is different, and the ID corresponding to different CSI-RS resources is different, for example, the ID corresponds to a transmit antenna index/transmit antenna port of the IAB node or a panel (panel) index, one panel can only transmit one beam at a time, different transmit beams of one panel can only be time-division multiplexed, and beams of different panels can be simultaneously transmitted.

Or the father node configures a corresponding relation between an SRS resource set and one or more CSI-RS resources for the IAB node, wherein all the SRS resources in the SRS resource set and the one or more CSI-RS resources can be simultaneously transmitted by the IAB node. Further, the set of SRS resources is non codebook SRS sets on the MT link.

In one embodiment, a parent node configures an IAB node with a corresponding relationship between one SRS resource and one or more CSI-RS resource sets, where the IAB node has the capability of simultaneously transmitting the SRS resource and one CSI-RS resource in the one CSI-RS resource set, or the IAB node has the capability of simultaneously transmitting the SRS resource and one CSI-RS resource in each CSI-RS resource set in the multiple CSI-RS resource sets, the IAB node cannot simultaneously transmit different CSI-RS resources in one CSI-RS resource set, and the CSI-RS resource in different CSI-RS resource sets and the SRS resource are simultaneously transmittable by the IAB node.

Further, the SRS resource and the CSI-RS resource are both measurement resources to be transmitted by the IAB node.

Further, the SRS resource is an uplink sounding reference signal on the MT link, and the CSI-RS resource is a sounding reference signal on the DU link.

Further, the parent node configures one or more corresponding CSI-RS resources for different SRS resources, respectively.

Further, the ID of each SRS resource and the ID of each CSI-RS resource set are different, and the IDs of different CSI-RS resource sets are different, for example, the ID corresponds to the transmit antenna index of the IAB node or the panel index, one panel can only transmit one beam at a time, different transmit beams of one panel can only be time division multiplexed, and beams of different panels can be simultaneously transmitted. Further, the set of SRS resources is a non-codebook SRS set on the MT link.

In one embodiment, the parent node configures spatial relationship information of an uplink channel or signal on the MT link to the IAB node, where the spatial relationship information includes a downlink measurement reference signal resource index on the DU link, and the IAB node obtains a spatial transmit filter for transmitting the uplink channel or signal on the MT link according to the spatial transmit filter of the downlink measurement reference signal on the DU link, where the spatial transmit filter may also be referred to as a transmit beam.

For example, the parent node configures the CSI-RS resource on the DU link in the spatial relationship information of the SRS resource on the MT link configured to the IAB node, that is, the IAB node is instructed to transmit the SRS resource by using the same transmission beam as the CSI-RS resource on the DU link.

In one embodiment, the parent node configures the IAB node with quasi co-located reference signal information of a downlink channel or signal on the MT link, the quasi co-located reference signal information including an uplink measurement reference signal resource index of the DU link.

For example, the parent node configures, to the IAB node, the SRS resource on the DU link with the quasi-co-located reference signal information of the association space reception parameter of the CSI-RS resource on the MT link, that is, instructs the IAB node to receive the CSI-RS resource on the MT link by using the same reception beam as the SRS resource on the DU link.

In one embodiment, the IAB node reports the time-frequency resources that need to be measured by the parent node to the parent node. The IAB node may interfere with each other when it is executing upstream Tx and downstream Tx simultaneously. For example, an IAB node downstream Tx interferes with the parent node receiving the IAB node's upstream Tx. To solve this problem, the following scheme is given.

The IAB node reports the measurement configuration information to the father node; the father node carries out measurement, and the father node feeds back a measurement result to the IAB node; when the IAB node executes upstream Tx and downstream Tx simultaneously, the downstream Tx uses a beam with little interference to the parent node.

The measurement configuration information comprises one or more resource sets, and each resource set comprises one or more time-frequency resource configuration information to be measured.

The time-frequency resource configuration information comprises at least one of the following information: time, frequency domain, transmit power, receive beam indication, whether time constraint is on, quasi co-located reference signal.

The measured quantity includes at least one of: signal received power, target link quality, path loss value, SI R, SINR.

The signal receiving power may be the receiving power at the position of the time-frequency resource to be measured corresponding to the measurement configuration, or the receiving power at the position of the time-frequency resource to be measured of the IAB node upstream Tx.

The target link quality is the link quality at which the parent node receives the IAB node upstream Tx, including RSRQ of the reference signal, SINR of the reference signal, or CQI of the reference signal.

The SIR is a ratio of Ps and Pi, wherein Ps is the receiving power of a reference signal of an IAB node upstream Tx measured by a father node, and Pi is the receiving power corresponding to a time-frequency resource position to be measured reported by the IAB node measured by the father node. The power is often expressed in dB values, so the ratio of the powers corresponds to the difference in dB values.

The path loss is a path loss value corresponding to the time-frequency resource to be measured, which is measured by the father node according to the resource in the measurement configuration, or the path loss between the IAB node and the father node is measured by the father node.

The feedback quantity of the parent node to the IAB node comprises at least one of the following: the resource index, the received power of the corresponding resource, the path loss of the corresponding resource, the received power of the corresponding resource, and the RSRQ or SINR or CQI of the IAB node upstream Tx reference signal received by the father node.

The parent node determines the feedback quantity based on at least one of the following ways:

the amount by which the threshold condition is met is fed back,

the amount of feedback that satisfies the threshold condition and one or more other related amounts.

The IAB node executes both downstream Tx and upstream Tx whose downstream Tx avoids a beam that interferes greatly with the parent node.

The time configuration of the time frequency resource configuration comprises at least one of the following: the period of the time-frequency resource to be measured, the time offset of the time-frequency resource to be measured, the effective measurement time of the time-frequency resource to be measured, and the timing offset of the IAB node downlink Tx and the IAB node uplink Tx.

The period (denoted as P) of the time-frequency resource to be measured is that the IAB node potentially sends data on the corresponding time-frequency resource to be measured with the period P, as shown in fig. 4. The time offset of the time-frequency resource to be measured refers to a time offset with the starting point of the period P as a boundary, and the time offset may be at least one of a plurality of radio frames, a plurality of subframes, a plurality of time slots, and a plurality of OFDM symbols, as shown in fig. 5. The effective measurement duration of the time-frequency resource to be measured indicates the effective time of the parent node for performing the time-frequency resource to be measured. For example, if the IAB node has no transmission power or the beam is changed outside the valid time, the IAB node informs the parent node of the valid time for the time-frequency resource measurement to be measured, as shown in fig. 6.

The configuration information of the time-frequency resource to be measured includes information whether a time limit (timing) for measuring the time-frequency resource to be measured is on. When the time limit is turned on, the IAB node may change the transmission parameters, such as the transmission beam and the transmission power, of the time-frequency resource to be measured in each transmission period of the CSI-RS. The timing offset amount of the time-frequency resource to be measured from the IAB node upstream Tx is a time deviation between the transmission timing of the IAB node downlink and the timing of the IAB node upstream Tx. The timing offset is a number of OFDM symbols or a number of time domain samples (Tc or Ts) or a number of OFDM symbols and a number of time domain samples. As shown in the following figure, there may be a timing offset between the IAB node upstream Tx and the IAB node downstream Tx. The IAB node reports the time-frequency resource to be measured to the father node, the IAB node reports the timing deviation of the IAB node upstream Tx and the IAB node downstream Tx to the father node, and the deviation amount is the difference between the IAB node upstream Txtime and the IAB node downstream Tx time or the difference between the IAB node downstream Tx time and the IAB node upstream Tx time. The parent node measures the time-frequency resource to be measured reported by the IAB node by using the timing of receiving the IAB node upstream Tx as a reference, and the time-frequency resource to be measured is shown in fig. 7.

The frequency domain configuration of the time-frequency resource to be measured comprises at least one of the following: the method comprises the steps of carrier information of the time-frequency resource to be measured, the bandwidth occupied by the time-frequency resource to be measured, the frequency domain density of the time-frequency resource to be measured, the subcarrier interval of the time-frequency resource to be measured and the frequency domain offset of the time-frequency resource to be measured.

The carrier information of the time-frequency Resource to be measured is an absolute carrier number or a carrier offset of a carrier of the time-frequency Resource to be measured and a carrier corresponding to the IAB node MT, and the carrier offset is the RB number or the Subcarrier (SC) number or the Resource Block (RB) number and the SC number.

The frequency domain offset of the reference signal refers to the offset of the reference signal within RB, Resource Block.

The RB size and SC size of the carrier offset are determined by a reference subcarrier spacing (reference SC), for example, the reference subcarrier is 15 × 2^ u, u is a natural number greater than or equal to 0, u may be a value predetermined between nodes, or a value used in a communication process between a parent node and an IAB node, or a value notified to the parent node by the IAB node or OAM or CU.

And the transmitting power of the time frequency resource to be measured is the transmitting power of the IAB node downlink Tx on the corresponding time frequency resource.

And the father node measures the time-frequency resource to be measured or the reference signal of the IAB node upstream Tx in the resource set configured by measurement reported by the IAB node according to the receiving wave beam corresponding to the resource set configured by the measurement reported by the IAB node. For example, the measurement configuration reported by the IAB node includes time-frequency resource to be measured, the receiving beam parameter of the time-frequency resource to be measured is a receiving beam at the parent node side, and for example, the receiving beam parameter of the time-frequency resource to be measured is an SRS resource index on the corresponding upstream Tx, that is, the parent node measures the time-frequency resource to be measured reported by the IAB node by using the receiving beam corresponding to the SRS resource receiving upstream Tx.

Optionally, the quasi co-located reference signal of QCL-type of the time-frequency resource to be measured is a signal or channel on upstream Tx, for example, SRS resource of upstream Tx, that is, SRS resource on upstream Tx is included in the configuration information of the quasi co-located reference signal of QCL-type of the time-frequency resource to be measured.

Optionally, the quasi co-located reference signal of QCL-type of the time-frequency resource to be measured is a signal or channel on downstream Tx, e.g. SSB resource of downstream Tx, i.e. SSB resource on downstream Tx is included in the configuration information of the quasi co-located reference signal of associated QCL-type of CSI-RS resource.

Further, the channel type corresponding to the time frequency resource to be measured is notified, for example, the corresponding time frequency resource is a control channel of the IAB node downlink Tx, or the corresponding time frequency resource is a traffic channel of the IAB node downlink Tx, which may further be a semi-static traffic channel.

Optionally, the quasi co-located reference signal of QCL-type a of the CSI-RS resource is a signal or channel on upstream Tx, e.g. SRS resource of upstream Tx, i.e. the SRS resource on upstream Tx is included in the configuration information of the quasi co-located reference signal of CSI-RS resource associated with QCL-type a.

Optionally, the quasi co-located reference signal of QCL-type a of the CSI-RS resource is a signal or channel on downstream Tx, e.g. the SSB resource of downstream Tx, i.e. the SSB resource on downstream Tx is included in the configuration information of the quasi co-located reference signal of the QCL-type a of the CSI-RS resource.

And if the time-frequency resource configuration to be measured of the measurement configuration reported by the IAB node does not contain the receiving wave beam, the father node performs corresponding measurement according to the historical receiving wave beam of the IAB node. The measured quantity includes at least one of: RSRP, RSRQ, SINR, path loss, SIR.

The father node feeds back the resource set index to the IAB node, further, the fed back time-frequency resource set index to be measured is a set index corresponding to the time-frequency resource to be measured, the receiving performance of the father node meets the threshold, and the threshold is at least one of the following requirements: the measurement quantity is greater than or equal to a specific threshold, the measurement quantity is less than or equal to the specific threshold, the measurement quantity is greater than the specific threshold, and the measurement quantity is less than the specific threshold.

And the father node measures the receiving power of the time-frequency resource to be measured in the resource set and records the receiving power as P _ i, the father node feeds back a resource set index corresponding to the P _ i meeting the threshold to the IAB node, and the threshold corresponding to the P _ i is recorded as threshold _ 1. P _ i may be an average value of reference signal RSRP of different resources in one resource set, or a minimum value of reference signal RSRP of different resources in one resource set, or a maximum value of reference signal RSRP of different resources in one resource set. Optionally, the parent node feeds back the P _ i value meeting the threshold to the IAB node.

The parent node measures the channel quality of the reference signal of the IAB node upstream Tx, which can be characterized by one of the following quantities: the RSRQ, the SINR, the CQI and the RSRP are respectively recorded as RSRQ _ s, SINR and CQI, the parent node feeds back an index of a resource set corresponding to the measurement quantity meeting the threshold to the IAB node, and the threshold corresponding to the RSRQ _ s or the SINR or the CQI is recorded as threshold _ 2. Optionally, the parent node feeds back the RSRQ _ s value, SINR value, or CQI value satisfying the threshold to the IAB node.

And the path loss corresponding to the time-frequency resource to be measured in the parent node measurement resource set is marked as PL _ i, the parent node feeds back a resource set index corresponding to PL _ i meeting the threshold to the IAB node, and the threshold corresponding to PL _ i is marked as threshold _ 3. PL _ i may be an average value of path losses corresponding to time-frequency resources to be measured of different resources in one resource set, or when a parent node feeds back a resource set index corresponding to a path loss greater than or equal to a threshold value, the path loss may also be a minimum value of the path loss corresponding to the time-frequency resources to be measured in one resource set, or when a parent node feeds back a resource set index corresponding to a path loss less than or equal to a threshold value, the path loss may also be a maximum value of the path loss corresponding to the time-frequency resources to be measured in one resource set. Optionally, the parent node may feed back the PL _ i value satisfying the condition to the IAB node.

The parent node measures the path loss corresponding to the reference signal of the IAB node upstream Tx as PL _ s, the parent node measures the path loss of the time-frequency resource to be measured in the resource set as PL _ i, and the ratio between PL _ s and PL _ i is expressed as SIR _ PL ═ PL _ s/PL _ i. And the parent node feeds back the resource set index corresponding to the SIR _ PL meeting the threshold to the IAB node, and the threshold corresponding to the SIR _ PL is recorded as threshold _ 4. Optionally, the parent node may feed back to the IAB node the SIR _ PL value that satisfies the threshold.

The parent node measures the signal received power corresponding to the reference signal of the IAB node upstream Tx as Ps, for example, the parent node measures the SRS signal received power of the IAB node upstream Tx. And the parent node measures the signal receiving power of the time-frequency resource to be measured in the resource set and records the signal receiving power as Pi, the ratio of Ps to Pi is recorded as the measured quantity SIR as Ps/Pi, the parent node feeds back the resource set index corresponding to the SIR meeting the threshold to the IAB node, and the threshold corresponding to the SIR is recorded as threshold _ 5. Optionally, the parent node feeds back the SIR value satisfying the threshold to the IAB node.

When the feedback quantity received by the IAB node from the parent node is one of the following situations or a combination thereof, the IAB node considers that the IAB downlink Tx corresponding to the resource set index causes interference to the parent node Rx:

the parent node feeds back that P _ i is larger than or equal to the resource set index corresponding to the threshold _ 1;

When the feedback quantity received by the IAB node from the parent node is one of the following situations or a combination thereof, the IAB node considers that the IAB downlink Tx corresponding to the resource set index does not interfere with the parent node Rx:

the parent node feeds back that P _ i is less than or equal to the resource set index corresponding to the threshold _ 1;

The IAB node receives the feedback of the parent node to determine the beam that the IAB node downlink Tx causes interference to the parent node.

The IAB node executes the downlink Tx and the uplink Tx at the same time, and the IAB node selects the beam corresponding to the downlink Tx so that the downlink Tx of the IAB node does not interfere with the parent node or the downlink Tx of the IAB node generates small interference on the parent node.

In one embodiment, the IAB node configures the association relationship between the SRS resource and the CSI-RS resource to the child node or the UE, the child node or the UE performs the measurement operation, and the child node or the UE reports the measurement value to the IAB node. And the IAB node receives the reported value of the child node or the UE, and avoids adopting a beam causing interference to the child node or the UE for upstream Tx when the IAB node executes the upstream Tx and the downstream TX simultaneously.

The IAB node upstream Tx may interfere with the recipient child node or UE of the IAB node downstream Tx. The IAB node may configure SRS for a child node or UE.

The IAB node configures measurement configuration for the child node or UE.

The measurement configuration information comprises one or more resource sets, and each resource set comprises one or more reference signal configuration information;

the reference signal configuration information includes at least one of: time configuration, frequency domain configuration, sequence configuration, transmission power, and received beam indication.

The reference signal may be an SRS or DMRS. The measured quantity includes at least one of: RSRP, target link quality, path loss value, SIR.

The RSRP may be the RSRP of the reference signal in the UE or the sub-node measurement configuration, and may also be the RSRP of the reference signal (e.g., CSI-RS, SSB, DMRS, PTRS, etc.) of the IAB node downlink Tx measured by the UE or the sub-node.

The target link quality is that the UE or the child node measures RSRQ or SINR or CQI of a reference signal of the IAB node downlink Tx.

SIR is the ratio of Ps, which measures the received power of the reference signal of the IAB node downlink Tx for the UE or the child node, and Pi, which measures the received power of the reference signal of the IAB node uplink Tx for the UE or the child node. The power is often expressed in dB values, so the ratio of the power corresponds to the difference in dB values.

The path loss value is the path loss measured by the UE or the child node according to the resources in the measurement configuration, or the path loss measured between the IAB node and the UE or the child node by the UE or the child node.

The feedback quantity of the UE or the sub-node to the IAB node comprises at least one of the following: the resource index, the path loss of the corresponding resource, and the RSRP of the corresponding resource, the father node receives the RSRQ of the IAB node upstream Tx reference signal, and the father node receives the SINR of the IAB node upstream Tx reference signal.

The IAB node executes both downstream Tx and upstream Tx, whose downstream Tx avoids a beam that interferes greatly with the parent node.

frequency domain configuration of SRS resources;

sequence configuration of SRS resources;

time configuration of SRS resources;

the transmit power of the SRS;

configuring SRS resource quasi-co-located reference signals;

the SRS resource receives the beam indication.

The time configuration includes at least one of: the period of the SRS, the time offset of the SRS, the effective measurement time of the SRS, and the timing offset of the SRS signal from the IAB node downlink Tx (the timing offset is to be refined).

Here, the SRS period (denoted as P) means that the IAB node transmits the reference signal periodically with P, as shown in fig. 4. The time offset of the reference signal refers to a time offset with the beginning of the period P as a boundary, and the time offset may be at least one of a plurality of radio frames, a plurality of subframes, a plurality of slots, and a plurality of OFDM symbols, as shown in fig. 5. The valid measurement time of the reference signal indicates a valid time for the parent node to perform the reference signal measurement. For example, if the IAB node does not transmit the reference signal or the beam is changed or the power of the reference signal is changed, the sub-node or UE should not measure the reference signal at these time domain positions, and therefore the effective time for instructing the sub-node or UE to perform the measurement is shown in fig. 6.

The transmit power of the reference signal is the transmit power of the IAB node upstream Tx reference signal.

And the UE or the sub-node measures the reference signal of the IAB node according to the receiving beam of the resource set configured by the measurement of the IAB node. And if the resource set configured by the measurement of the IAB node does not contain the receiving beam, the UE or the child node performs corresponding measurement according to the historical receiving beam communicated with the IAB node.

The UE or the sub-node measures the channel quality corresponding to the reference signal of the IAB node downlink Tx, and the channel quality can be characterized by one of the following quantities: the RSRQ, the SINR and the CQI are respectively recorded as RSRQ _ s, SINR and CQI, the UE or the sub-node feeds back the index of the resource set corresponding to the measurement quantity meeting the threshold to the IAB node, and the threshold corresponding to the RSRQ _ s or the SINR or the CQI is recorded as threshold _ 2. Optionally, the UE or the child node feeds back the RSRQ _ s value, SINR value, or CQI value satisfying the threshold to the IAB node.

And measuring the path loss of the reference signal in the resource set by the UE or the sub-node as PL _ i, feeding back the index of the resource set corresponding to the measurement quantity meeting the threshold to the IAB node by the UE or the sub-node, and recording the threshold corresponding to the PL _ i as threshold _ 3. PL _ i may be an average value of reference signal path losses of different resources in one resource set, or when the UE or the child node feeds back a resource set index corresponding to a path loss greater than or equal to a threshold, the path loss may also be a minimum value of reference signal path losses of different resources in one resource set, or when the UE or the child node feeds back a resource set index corresponding to a path loss less than or equal to a threshold, the path loss may also be a maximum value of reference signal path losses of different resources in one resource set. Optionally, the UE or the sub-node may feed back the PL _ i value satisfying the threshold to the IAB node.

The path loss corresponding to the reference signal of the IAB node upstream Tx is measured by the UE or the child node and is denoted as PL _ s, the path loss of the reference signal in the resource set measured by the UE or the child node is denoted as PL _ i, and the ratio between PL _ s and PL _ i is denoted as SIR _ PL _ s/PL _ i. The UE or the sub-node feeds back the resource set index corresponding to the SIR _ PL meeting the threshold, which is recorded as threshold _4, to the IAB node. Optionally, the UE or the child node may feed back the SIR _ PL value satisfying the threshold to the IAB node.

The signal received power corresponding to the reference signal of the IAB node downlink Tx measured by the UE or the child node is denoted as Ps, for example, the CSI-RS signal received power of the IAB node downlink Tx measured by the UE or the child node. The UE or the sub-node measures the signal received power of the reference signal in the resource set and records Pi, the ratio of Ps to Pi is recorded as Ps/Pi, the UE or the sub-node feeds back the resource set index corresponding to the SIR meeting the threshold to the IAB node, and the threshold corresponding to the SIR is recorded as threshold _ 5. Optionally, the UE or the sub-node may feed back the SIR value satisfying the threshold to the IAB node.

When the IAB node receives the feedback quantity of the UE or the child node, which is one of the following situations or a combination thereof, the IAB node considers that the IAB upstream Tx corresponding to the resource set index causes interference to the UE or the child node Rx:

the UE or the sub-node feeds back the corresponding resource set index with the RSRP _ i greater than or equal to the threshold _ 1;

UE or sub-node feedback RSRQ _ i is less than or equal to the resource set index corresponding to threshold _2

the UE or the sub-node feeds back the corresponding resource set index having SIR less than or equal to threshold _ 5.

When the IAB node receives the feedback quantity of the UE or the child node, which is one of the following situations or a combination thereof, the IAB node considers that the iabuppeak Tx corresponding to the resource set index does not cause large interference to the UE or the child node Rx:

UE or a sub-node feeds back a resource set index corresponding to RSRP _ i smaller than or equal to threshold _ 1;

The IAB node receives feedback from the UE or the child node to determine the beam on which the IAB node upstream Tx interferes with the UE or the child node.

The IAB node executes downlink Tx and uplink Tx simultaneously, with uplink Tx avoiding using beams that cause interference to the UE or the child node, or with uplink Tx using beams that cause less interference to the UE or the child node.

In an embodiment, a multiplexing apparatus is provided, where the apparatus is applied to a first node, as shown in fig. 11, the multiplexing apparatus provided in this embodiment of the present application mainly includes a first sending module 101 and a first receiving module 102.

A first sending module 101, configured to send measurement configuration information to a second node, where the measurement configuration information is used to instruct the second node to measure relevant information of a resource corresponding to the measurement configuration information;

a first receiving module 102 configured to receive the measurement result sent by the second node.

In one embodiment, the measurement configuration information includes first measurement configuration information and second measurement configuration information, where the measurement configuration information includes reference signal configuration information for the second node to measure a reference signal, or the measurement configuration information includes time-frequency resource configuration information for the second node to measure a time-frequency resource; the second measurement configuration information includes the second node measurement corresponding quasi co-located reference signal configuration information or corresponding spatial reception parameters.

In one embodiment, the type of the reference signal includes one or more of:

In one embodiment, the time configuration information includes one or more of: an opportunity, an effective time, and a timing offset occur, wherein the effective time is an effective time for the second node to perform the measurement operation, and the timing offset is an amount of time adjusted by the second node to perform the measurement operation.

In one embodiment, the validity period includes one or more of: effective measurement duration, starting point, offset.

In one embodiment, the measurement results include one or more of: the first measurement configuration information corresponds to the received power of the resource, the first measurement configuration information and the second measurement configuration information correspond to the received power of the resource, the path loss value corresponding to the first measurement configuration information, the path loss value corresponding to the resource, and the link quality between the second node and the first node, which are measured in the second measurement configuration information.

In one embodiment, the apparatus further comprises: a data transmission module configured to select a beam combination satisfying a requirement based on the measurement result to perform upstream and downstream simultaneous transmission after receiving the measurement result transmitted by the second node.

In one embodiment, the apparatus further comprises: a data receiving module configured to select a beam combination satisfying requirements to perform upstream and downstream simultaneous transmission based on the measurement result after the receiving of the measurement result transmitted by the second node in case that the second node is a parent node of the IAB node.

In one embodiment, the apparatus further comprises: a data receiving module configured to select a beam combination satisfying requirements to perform upstream and downstream simultaneous reception based on the measurement result after the reception of the measurement result transmitted by the second node in case that the second node is a child node of the IAB node.

The multiplexing device provided in the embodiment can execute the multiplexing method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution of the method. For technical details that are not described in detail in this embodiment, reference may be made to the multiplexing method provided in any embodiment of the present invention.

It should be noted that, in the embodiment of the multiplexing apparatus, each included unit and each included module are only divided according to functional logic, but are not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the application.

In an embodiment, a multiplexing apparatus is provided, and the multiplexing apparatus is applied to a second node, as shown in fig. 12, the multiplexing method provided in this embodiment of the present application mainly includes a second receiving apparatus 111 and a second sending apparatus 112.

A second receiving device 111, configured to receive measurement configuration information sent by a first node, where the measurement configuration information is used to instruct a second node to measure relevant information of a resource corresponding to the measurement configuration information;

second transmitting means 112 configured to transmit the measurement result to the second node.

In one embodiment, the type of the reference signal includes one or more of:

Fig. 13 is a schematic structural diagram of an apparatus provided in the embodiment of the present application, and as shown in fig. 12, the apparatus includes a processor 121, a memory 122, an input device 123, an output device 124, and a communication device 125; the number of the processors 121 in the device may be one or more, and one processor 121 is taken as an example in fig. 12; the processor 121, the memory 122, the input device 123 and the output device 124 in the apparatus may be connected by a bus or other means, and the bus connection is exemplified in fig. 12.

The memory 122 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the multiplexing method in the embodiment of the present application (for example, the first sending module 101 and the first receiving module 102 in the multiplexing device). Also, for example, the program instructions/modules corresponding to the multiplexing method in the embodiment of the present application (for example, the second receiving device 111 and the second sending device 112 in the multiplexing device). The processor 121 executes various functional applications and data processing of the device by executing software programs, instructions and modules stored in the memory 122, namely, implements any multiplexing method provided by the embodiment of the present application.

The memory 122 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory 122 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 122 may further include memory located remotely from the processor 121, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input device 123 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function controls of the apparatus. The output device 124 may include a display device such as a display screen.

The communication device 125 may include a receiver and a transmitter. The communication device 125 is configured to perform information transceiving communication according to the control of the processor 121.

It should be noted that, in the case that the above-mentioned device is a first node, the processor 121 executes various functional applications and data processing by running a program stored in the system memory 122, for example, to implement the demultiplexing method provided in the embodiment of the present application, where the method includes:

and receiving the measurement result sent by the second node.

Of course, those skilled in the art can understand that the processor 121 can also implement the technical solution of the multiplexing method provided in any embodiment of the present application. The hardware structure and function of the device can be explained with reference to the content of the embodiment.

It should be noted that, in the case that the above-mentioned device is a second node, the processor 121 executes various functional applications and data processing by running a program stored in the system memory 122, for example, to implement the multiplexing method provided in the embodiment of the present application, where the method includes:

sending the measurement result to the first node.

Of course, those skilled in the art can understand that the processor 610 may also implement the technical solution of the message interaction method provided in any embodiment of the present application. The hardware structure and function of the device can be explained with reference to the content of the embodiment.

In an exemplary embodiment, the present application further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a multiplexing method, the method being applied to a first node, comprising;

and receiving the measurement result sent by the second node.

Of course, the storage medium provided in the embodiments of the present application contains computer-executable instructions, and the computer-executable instructions are not limited to the method operations described above, and may also perform related operations in the multiplexing method provided in any embodiment of the present application.

Embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a multiplexing method, the method being applied to a second node, including:

sending the measurement result to the first node.

From the above description of the embodiments, it is obvious for those skilled in the art that the present application can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may 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 disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.

It will be clear to a person skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car mounted mobile station.

In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (digital versatile disc, DVD, or CD disc), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.

The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the following drawings and the appended claims, without departing from the scope of the invention. Therefore, the proper scope of the invention is to be determined according to the claims.

Claims

1. A multiplexing method, applied to a first node, comprising:

and receiving the measurement result sent by the second node.

2. The method of claim 1, wherein the measurement configuration information comprises a first measurement configuration information and a second measurement configuration information, wherein the measurement configuration information comprises a reference signal configuration information for the second node to measure a reference signal, or wherein the measurement configuration information comprises a time-frequency resource configuration information for the second node to measure a time-frequency resource; the second measurement configuration information includes the second node measurement corresponding quasi co-located reference signal configuration information or corresponding spatial reception parameters.

3. The method of claim 2, wherein in the case that the first measurement configuration information comprises reference signal configuration information for the second node to measure the reference signal, the reference signal configuration information comprises one or more of:

4. The method of claim 3, wherein the type of the reference signal comprises one or more of:

sounding Reference Signal (SRS), channel state information reference signal (CSI-RS), synchronization broadcast block (SSB), control channel reference signal (PDCCH DMRS), traffic channel reference signal (PDSCH DMRS).

5. The method according to claim 2, wherein in case the measurement configuration information comprises time-frequency resource configuration information for the second node to measure time-frequency resources, the time-frequency resource configuration information comprises one or more of:

6. The method according to claim 3 or 5, wherein the time configuration information comprises one or more of:

the timing offset is an amount of time adjusted by the second node to perform the measurement operation.

7. The method of claim 6, wherein the valid time comprises one or more of:

effective measurement duration, starting point, offset.

8. The method of claim 1, wherein the measurement results include one or more of:

the first measurement configuration information corresponds to the received power of the resource, the first measurement configuration information and the second measurement configuration information correspond to the received power of the resource, the path loss value corresponding to the first measurement configuration information, the path loss value corresponding to the resource, and the link quality between the second node and the first node, which is measured in the second measurement configuration information.

9. The method of claim 8, wherein the received power satisfies one of the following conditions:

10. The method of claim 8, wherein the path loss value satisfies one of the following conditions:

the ratio of the path loss value corresponding to the signal of the first measurement configuration information to the path loss value between the second node and the first node is less than or equal to an eighth threshold value;

the link quality of the second node and the first node measured in the second measurement configuration information is less than or equal to a ninth threshold value;

11. The method of claim 1, wherein the first node is an integrated access and backhaul IAB node, wherein the second node is a parent node of the IAB node, or wherein the second node is a child node of the IAB node.

12. The method of claim 11, wherein in a case where the second node is a parent node of the IAB node, after the receiving the measurement result sent by the second node, further comprising:

13. The method of claim 11, wherein in a case that the second node is a child node of the IAB node, after the receiving the measurement result sent by the second node, further comprising:

14. A multiplexing method, applied to a second node, comprising:

sending the measurement result to the first node.

15. A multiplexing apparatus, the apparatus configured at a first node, comprising:

16. A multiplexing apparatus, the apparatus being configured at a second node, comprising:

17. An apparatus, comprising:

one or more processors;

a memory for storing one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-14.

18. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-14.