KR20220131602A - Method for providing layered xr service and base station therefor - Google Patents

Abstract

A method for providing a layered XR service and a base station therefor are disclosed. The method according to one embodiment of the present invention is a method in which the base station provides layered XR in a wireless communication system, comprising the following steps of: receiving a message requesting formation of a layered XR bearer from a core network; and transmitting data corresponding to an LQ layer and data corresponding to an HQ layer to a UE by using a PDSCH resource indicated by at least one PDCCH masked with at least one of XR-M-RNTI, C-RNTI, and CS-RNTI, wherein the data corresponding to the LQ layer is transmitted only through a resource indicated by the PDCCH masked with XR-M-RNTI. According to the present invention, cell capacity for a specific cell required when providing an XR service can be reduced.

Description

METHOD FOR PROVIDING LAYERED XR SERVICE AND BASE STATION THEREFOR

The present invention relates to a method and a base station for providing a Layered XR service.

A technology to support XR service that encompasses AR and VR technology is being discussed in the 3GPP standard (Release 18). A Layered XR method has been proposed in which data for XR service is divided into several layers and delivered, and this is characterized in that a layer for providing a basic service and a layer for providing a high-quality service are separated. For example, if a 360-degree VR service is provided, data is transmitted by separating LQ (Low Quality) tiles and HQ (High Quality) tiles, and the HQ tiles are displayed according to the ROI determined by the user's gaze, and the remaining A method of displaying an LQ tile in an area has been proposed.

However, these XR services were typically being serviced only through unicasting. When the XR service is provided only through unicasting, a problem in terms of cell capacity for a specific cell occurs, but a solution has not been proposed. Accordingly, in order to solve the problem of cell capacity for a specific cell, the present invention proposes a new protocol for reducing cell capacity by dividing an LQ tile and an HQ tile into different layers and transmitting them in different ways.

For reference, looking at the prior art prior to the application of the present invention, for example, KR 10-2105511 B only discloses the content of determining the TCI for a control resource set, and KR 10-2020-0119435 A is a spatially partitioned tile It only discloses the content of generating video streams of various resolutions by encoding them in parallel.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned needs and/or problems.

Another object of the present invention is to implement a method and a base station for providing a layered XR service capable of reducing cell capacity for a specific cell required when providing the XR service.

A method for providing a Layered XR service according to an embodiment of the present invention is a method for a base station to provide Layered XR in a wireless communication system, the method comprising: receiving a message requesting formation of a Layered XR bearer from a core network; Using the resource of the PDSCH indicated by at least one PDCCH masked with at least one of XR-M-RNTI, C-RNTI, or CS-RNTI, data corresponding to the LQ layer and data corresponding to the HQ layer are transmitted to the UE The data corresponding to the LQ layer may be transmitted only through the resource indicated by the PDCCH masked with the XR-M-RNTI.

In an embodiment, when the XR-M-RNTI is masked to at least one of a plurality of PDCCHs and a C-RNTI or a CS-RNTI is masked to the rest of the plurality of PDCCHs, the PDCCH on which the XR-M-RNTI is masked Data corresponding to the LQ layer is transmitted to the UE using a resource indicated by can be transmitted.

In an embodiment, the PDCCH masked with the XR-M-RNTI may be for indicating resources of the PDSCH to be transmitted to a plurality of terminals.

In an embodiment, the PDCCH masked with the C-RNTI or CS-RNTI may be for indicating the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.

In an embodiment, data corresponding to the LQ layer may be transmitted through multicasting using a resource of a PDSCH indicated by a PDCCH masked with XR-M-RNTI.

In an embodiment, data corresponding to the HQ layer may be transmitted by unicasting using a resource of a PDSCH indicated by a PDCCH masked with C-RNTI or CS-RNTI.

A method for providing a Layered XR service according to another embodiment of the present invention is a method for a base station to provide Layered XR in a wireless communication system, the method comprising: receiving a message requesting formation of a Layered XR bearer from a core network; Data corresponding to the LQ layer is transmitted to the UE using the PDSCH resource indicated by the first PDCCH masked with XR-M-RNTI, and the second PDCCH masked with at least one of C-RNTI and CS-RNTI indicates and transmitting data corresponding to the HQ layer to the UE by using the PDSCH resource.

In an embodiment, the PDCCH masked with the XR-M-RNTI may be for indicating resources of the PDSCH to be transmitted to a plurality of terminals.

In an embodiment, the PDCCH masked with the C-RNTI or CS-RNTI may be for indicating the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.

In an embodiment, data corresponding to the LQ layer may be transmitted through multicasting using a resource of a PDSCH indicated by a PDCCH masked with XR-M-RNTI.

In an embodiment, data corresponding to the HQ layer may be transmitted by unicasting using a resource of a PDSCH indicated by a PDCCH masked with C-RNTI or CS-RNTI.

A method for providing a Layered XR service according to another embodiment of the present invention is a method for a base station to provide Layered XR in a wireless communication system, the method comprising: receiving a message requesting formation of a Layered XR bearer from a core network; ; and transmitting data corresponding to the LQ layer and the HQ layer to the UE by multicasting or unicasting using the resources of the PDSCH indicated by one PDCCH masked with XR-M-RNTI.

In an embodiment, the PDCCH masked with the XR-M-RNTI may be for indicating resources of the PDSCH to be transmitted to a plurality of terminals.

In an embodiment, the PDCCH may further include dedicated indication information that is allocated to each of a plurality of terminals and indicates a resource of a PDSCH to be transmitted in a UE-specific manner.

In an embodiment, when it is determined to indicate the resource of the PDSCH to be transmitted only to specific terminals based on the dedicated indication information, data corresponding to the LQ layer may be transmitted by multicasting.

In an embodiment, when it is determined to indicate the resource of the PDSCH to be transmitted to a plurality of terminals based on the dedicated indication information, data corresponding to the HQ layer may be transmitted through unicasting.

A base station according to another embodiment of the present invention is a base station for providing Layered XR in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to operate for providing a Layered XR service , and the operations are:

Using a PDSCH resource indicated by at least one PDCCH masked with at least one of an operation of receiving a message requesting formation of a Layered XR bearer from the core network, XR-M-RNTI, C-RNTI, or CS-RNTI, An operation of transmitting data corresponding to the LQ layer and data corresponding to the HQ layer to the UE, wherein the data corresponding to the LQ layer is transmitted only through resources indicated by the PDCCH masked with XR-M-RNTI. Can be transmitted. .

A base station according to another embodiment of the present invention is a base station for providing Layered XR in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to operate for providing a Layered XR service , and the above operations are: an operation of receiving a message requesting formation of a Layered XR bearer from the core network, and an LQ layer using the resource of the PDSCH indicated by the first PDCCH in which the XR-M-RNTI is masked. It may include transmitting data to the UE and transmitting data corresponding to the HQ layer to the UE using the resource of the PDSCH indicated by the second PDCCH masked with at least one of C-RNTI and CS-RNTI.

A base station according to another embodiment of the present invention is a base station for providing Layered XR in a wireless communication system, the base station comprising: one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to operate for providing a Layered XR service , and the operations are: an operation of receiving a message requesting formation of a Layered XR bearer from the core network, an LQ layer and an HQ layer using a resource of a PDSCH indicated by one PDCCH masked with XR-M-RNTI It may include the operation of transmitting the data corresponding to the multicasting or unicasting to the UE.

The effect of a method and a base station for providing a layered XR service according to an embodiment of the present invention will be described as follows.

The present invention can reduce the cell capacity of a specific cell by transmitting the LQ tile and the HQ tile in different layers. In particular, the LQ tile is transmitted to terminals belonging to at least one group in a multicasting manner, and the HQ tile is transmitted to a specific terminal in a unicasting manner, thereby maintaining the quality of the XR service, but minimizing the cell capacity. There is an excellent effect that it can.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to facilitate the understanding of the present invention, provide embodiments of the present invention, and together with the detailed description, explain the technical features of the present invention.
1 illustrates physical channels and general signal transmission used in a 3GPP system.
2 is a flowchart of a method for providing a Layered XR service according to the first embodiment of the present invention.
3 is a flowchart of a method for providing a Layered XR service according to a second embodiment of the present invention.
4 illustrates a communication system applied to the present invention.
5 illustrates a wireless device that can be applied to the present invention.
6 illustrates a signal processing circuit for a transmission signal.
7 shows another example of a wireless device applied to the present invention.
8 illustrates an XR device applied to the present invention.

Hereinafter, an embodiment disclosed in the present invention will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves. In addition, in describing the embodiments disclosed in the present invention, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present invention, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present invention, and the technical spirit disclosed in the present invention is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Physical channels and general signal transmission

1 illustrates physical channels and general signal transmission used in a 3GPP system. In a wireless communication system, a terminal receives information through a downlink (DL) from a base station, and the terminal transmits information through an uplink (UL) to the base station. Information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type/use of the information they transmit and receive.

When the terminal is powered on or newly enters a cell, the terminal performs an initial cell search operation, such as synchronizing with the base station (S11). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station, synchronizes with the base station, and obtains information such as a cell ID. Thereafter, the terminal may receive a physical broadcast channel (PBCH) from the base station to obtain intra-cell broadcast information. On the other hand, the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to check the downlink channel state.

After the initial cell search, the UE receives a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) according to information carried on the PDCCH to obtain more specific system information. It can be done (S12).

On the other hand, when first accessing the base station or when there is no radio resource for signal transmission, the terminal may perform a random access procedure (RACH) for the base station (S13 to S16). To this end, the UE transmits a specific sequence as a preamble through a Physical Random Access Channel (PRACH) (S13 and S15), and a response message to the preamble through the PDCCH and the corresponding PDSCH ((Random Access (RAR)) Response) message) In the case of contention-based RACH, a contention resolution procedure may be additionally performed (S16).

After performing the procedure as described above, the UE performs PDCCH/PDSCH reception (S17) and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (Physical Uplink) as a general uplink/downlink signal transmission procedure. Control Channel (PUCCH) transmission (S18) may be performed. In particular, the UE may receive downlink control information (DCI) through the PDCCH. Here, the DCI includes control information such as resource allocation information for the terminal, and different formats may be applied according to the purpose of use.

On the other hand, the control information transmitted by the terminal to the base station through the uplink or received by the terminal from the base station is a downlink/uplink ACK/NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), and a rank indicator (RI). ) and the like. The UE may transmit the above-described control information such as CQI/PMI/RI through PUSCH and/or PUCCH.

Structures of uplink and downlink channels

Downlink Channel Structure

The base station transmits a related signal to the terminal through a downlink channel to be described later, and the terminal receives the related signal from the base station through a downlink channel to be described later.

(1) Physical Downlink Shared Channel (PDSCH)

PDSCH carries downlink data (eg, DL-shared channel transport block, DL-SCH TB), and modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are available. applies. A codeword is generated by encoding the TB. A PDSCH can carry multiple codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword are mapped to one or more layers (Layer mapping). Each layer is mapped to a resource together with a demodulation reference signal (DMRS), is generated as an OFDM symbol signal, and is transmitted through a corresponding antenna port.

(2) Physical Downlink Control Channel (PDCCH)

The PDCCH carries downlink control information (DCI) and a QPSK modulation method is applied. One PDCCH is composed of 1, 2, 4, 8, 16 CCEs (Control Channel Elements) according to an Aggregation Level (AL). One CCE consists of six REGs (Resource Element Groups). One REG is defined as one OFDM symbol and one (P)RB.

The UE obtains DCI transmitted through the PDCCH by performing decoding (aka, blind decoding) on the set of PDCCH candidates. A set of PDCCH candidates decoded by the UE is defined as a PDCCH search space set. The search space set may be a common search space or a UE-specific search space. The UE may acquire DCI by monitoring PDCCH candidates in one or more search space sets configured by MIB or higher layer signaling.

Uplink Channel Structure

The terminal transmits a related signal to the base station through an uplink channel to be described later, and the base station receives the related signal from the terminal through an uplink channel to be described later.

(1) Physical Uplink Shared Channel (PUSCH)

PUSCH carries uplink data (eg, UL-shared channel transport block, UL-SCH TB) and/or uplink control information (UCI), and CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) waveform. , DFT-s-OFDM (Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing) is transmitted based on the waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is not possible (eg, transform precoding is disabled), the UE transmits a PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (eg, transform precoding is enabled), the UE transmits the CP-OFDM PUSCH may be transmitted based on a waveform or a DFT-s-OFDM waveform. PUSCH transmission is dynamically scheduled by a UL grant in DCI, or semi-static based on higher layer (eg, RRC) signaling (and/or Layer 1 (L1) signaling (eg, PDCCH)). Can be scheduled (configured grant). PUSCH transmission may be performed on a codebook-based or non-codebook-based basis.

(2) Physical Uplink Control Channel (PUCCH)

The PUCCH carries uplink control information, HARQ-ACK and/or a scheduling request (SR), and may be divided into a plurality of PUCCHs according to a PUCCH transmission length.

Hereinafter, embodiments of the present invention related to the XR service will be described with reference to the drawings.

Example 1

2 is a flowchart of a method for providing a Layered XR service according to the first embodiment of the present invention.

The gNB receives a request related to layered XR bearer formation from 5GC (5G Core) (S110).

A request related to the formation of a Layered XR bearer contains the following information:

- Configuration information for one multicasting bearer

- Configuration information for unicasting bearers of multiple UEs

The request related to the formation of the Layered XR bearer may further include the following information, as the case may be:

- Group ID used with multicasting bearers

- UE ID of the UE associated with the group ID

The gNB configures a parameter related to a radio resource for providing a layered XR bearer to a plurality of UEs, and transmits an RRC message including the configured parameter to the UEs (S120).

In S120, the RRC message may further include an indicator for the UE to confirm the multicasting control channel. The above indicator is, for example, a multicasting RNTI (Radio Network Temporary Identifier) for XR, and may be referred to as “XR-M-RNTI” in the present specification. The XR-M-RNTI may further include an indicator indicating that it is used for XR separately from the M-RNTI typically used for multicasting.

In the present invention, a parameter related to a radio resource for providing the Layered XR bearer may also be referred to as 'RRC configuration information'. The RRC configuration information is for demasking the PDCCH masked with XR-M-RNTI, C-RNTI, or CS-RNTI, which will be described later in S130 and S140, and must be transmitted to the UE in advance.

For demasking of the PDCCH to be transmitted in S130 and S140, the RRC configuration information receives the XR-M-RNTI in advance. For reference, information on C-RNTI or CS-RNTI is pre-recorded in the UE during the initial connection process between the UE and the gNB even if it is not transmitted in advance through S120, and separate transmission/reception is not required.

Meanwhile, UEs that subsequently receive the scrambled or masked PDCCH descramble or demask the received PDCCH. In the past, since the RNTI value masked to the PDCCH was defined as only one C-RNTI for unicasting and one M-RNTI for multicasting in one time slot, demasking is also performed only based on one RNTI and the portion masked with another RNTI. is identified as missing, so-called missing. As in the prior art, when the UE receives a plurality of PDCCHs masked with different RNTIs without receiving RRC configuration information, and the gNB transmits two PDCCHs to the UE in one time slot, the UE ends among the different RNTIs. Missing can inevitably occur for any one of them. An embodiment of the present invention relates to a case in which two PDCCHs are transmitted in one time slot, and the UE not only demasks the XR-M-RNTI based on the RNTI information transmitted or configured in advance but also the C-RNTI or CS- RNTI can also be demasked. Accordingly, missing does not occur during demasking of the UE.

Meanwhile, in one embodiment, S120 may be realized in response to receiving a request related to Layered XR bearer formation received in S110. That is, in response to receiving the request related to Layered XR bearer formation, the gNB sets parameters related to radio resources for providing the Layered XR bearer to a plurality of UEs, and sends an RRC message including the configured parameters to the UEs. is to transmit Hereinafter, S130 and S140 will be described in detail.

The gNB transmits a PDCCH for indicating a resource of a PDSCH to be transmitted to a plurality of UEs by masking it with an XR-M-RNTI (S130).

In S130, resources masked with the XR-M-RNTI among the resources of the PDSCH may be distinguished from other resources based on the masking. The PDCCH includes resource information of the PDSCH transmitted to a plurality of UEs.

The gNB masks a PDCCH for indicating a resource of a PDSCH to be transmitted to a specific UE among UEs included in the group with a C-RNTI (Cell RNTI) or CS-RNTI (Configured Scheduling RNTI) of the specific UE and transmits (S140) ).

Among the resources of the PDSCH, resources masked with the C-RNTI or CS-RNTI may be distinguished from other resources based on the masking. The PDCCH includes resource information of the PDSCH to be transmitted only to a specific UE, and in this case, the specific UE is not limited to a singular number.

Meanwhile, S130 and S140 are not distinguished chronologically or causally, and the order of S130 and S140 may be changed in some cases. In addition, the PDCCH in which the XR-M-RNTI is masked and the PDCCH in which the C-RNTI or CS-RNTI is masked mentioned in S130 and S140 may be transmitted simultaneously or immediately adjacent in time. In a preferred embodiment, the PDCCH masked with XR-M-RNTI and the PDCCH masked with C-RNTI or CS-RNTI are transmitted simultaneously in one slot or time slot.

The gNB transmits the LQ tile and the HQ tile to the UE using the PDSCH resources indicated by the masked PDCCHs (S150).

When the XR-M-RNTI is masked to at least one of the plurality of PDCCHs and the C-RNTI or CS-RNTI is masked to the rest of the plurality of PDCCHs, the XR-M-RNTI uses a resource indicated by the masked PDCCH Thus, data corresponding to the LQ layer (LQ tile) is transmitted to the UE, and data corresponding to the HQ layer (HQ tile) is transmitted to the UE. Here, the plurality of PDCCHs are preferably two PDCCHs, in which one PDCCH is masked with XR-M-RNTI, and the other PDCCH is masked with C-RNTI or CS-RNTI to transmit data corresponding to the LQ layer, respectively. It is used to transmit data corresponding to the HQ layer.

The PDCCH masked with XR-M-RNTI indicates the resource of the PDSCH to be transmitted to a plurality of UEs, and data corresponding to the LQ layer is multi-using the resource of the PDSCH indicated by the PDCCH masked with the XR-M-RNTI. sent by casting.

The PDCCH masked with C-RNTI or CS-RNTI indicates a resource of a PDSCH to be transmitted to a specific UE among a plurality of UEs, and data corresponding to the HQ layer is indicated by the C-RNTI or CS-RNTI masked PDCCH. It is transmitted by unicasting using the resources of the PDSCH.

Here, when masked with C-RNTI, PDSCH resources are indicated only once in a corresponding subframe or a specific designated subframe, and when masked with CS-RNTI, PDSCH resources to be periodically transmitted in one or more subframes are indicated. .

That is, the present invention may transmit the HQ tile and the LQ tile to different layers using two PDCCHs. The LQ tile is transmitted through the LQ layer, and for this, the gNB transmits the PDCCH masked with XR-M-RNTI for a plurality of terminals together with the PDCCH masked with C-RNTI or CS-RNTI in one time slot. . Upon receiving this, the UE may demask the PDCCHs through the configuration information related to the XR-M-RNTI included in the RRC configuration information and the pre-received C-RNTI or CS-RNTI, and accordingly, the LQ tile and the It can receive HQ tiles.

As a result, the present invention can solve the problem of cell capacity caused by receiving the data of the LQ tile and the HQ tile only through unicasting, and further provides the HQ tile for the ROI and LQ for the remaining non-ROI. By providing tiles, the quality of XR service can also be maintained excellently.

Example 2

3 is a flowchart of a method for providing a Layered XR service according to a second embodiment of the present invention.

Unlike Embodiment 1, Embodiment 2 is characterized in that one PDCCH masked with XR-M-RNTI is used. The XR-M-RNTI of Example 2 has the same terms as the XR-M-RNTI of Example 1, but has different properties or functions. In more detail, the XR-M-RNTI of Embodiment 2, unlike the XR-M-RNTI of Embodiment 1, further has information for indicating a resource of a PDSCH to be transmitted UE-specifically. Accordingly, the PDCCH used in Embodiment 2 may have a larger size than the PDCCH of Embodiment 1. Hereinafter, a method of providing Layered XR according to Example 2 will be described.

The gNB receives a request related to Layered XR bearer formation from 5GC (5G Core) (S210). S210 corresponds to S110, and a detailed description thereof will be omitted.

The gNB configures a parameter related to a radio resource for providing a layered XR bearer to a plurality of UEs, and transmits an RRC message including the configured parameter to the UEs (S220). S220 corresponds to S210, and a detailed description thereof will be omitted. However, as described above, the XR-M-RNTI included in S220 is different from the XR-M-RNTI included in S120, and should be distinguished from each other.

The gNB transmits a PDCCH for indicating a resource of a PDSCH to be transmitted to a plurality of UEs by masking it with an XR-M-RNTI (S230).

Unlike Embodiment 1, Embodiment 2 uses one PDCCH, and the one PDCCH is masked with XR-M-RNTI and not with C-RNTI or CS-RNTI. Instead, the XR-M-RNTI further includes information indicating a resource of a PDSCH to be transmitted exclusively to a UE in order to distinguish between a resource of a PDSCH to be transmitted to a plurality of UEs and a resource of a PDSCH to be transmitted to a specific UE. In other words, one PDCCH masked with the XR-M-RNTI of Embodiment 2 may be referred to as a single PDCCH by referring to a multicasting resource and also to a unicasting resource. Accordingly, Embodiment 2 relieves the burden of the UE having to demask the PDCCH twice, and the PDCCH also uses a physical resource, which has the advantage of reducing the resource as well.

The information indicating the resource of the PDSCH to be transmitted exclusively for the UE may be referred to as 'dedicated indication information'. Whether the PDCCH masked with XR-M-RNTI indicates the resource of the PDSCH to be transmitted to a plurality of terminals based on both the XR-M-RNTI and the dedicated indication information, or the resource of the PDSCH to be transmitted to specific terminals It can be decided what to indicate.

The gNB transmits the LQ tile and the HQ tile to the UE using the PDSCH resources indicated by the masked PDCCHs (S240).

Data corresponding to the LQ layer (LQ tile) and data corresponding to the HQ layer are transmitted to the UE using a resource indicated by one PDCCH masked with XR-M-RNTI. Here, the data corresponding to the LQ layer uses the resources of the PDSCH to be transmitted to a plurality of terminals, and the data corresponding to the HQ layer uses the resources of the PDSCH to be transmitted to specific terminals. In this case, whether the LQ layer and the HQ layer are used may be distinguished based on dedicated indication information. That is, the gNB transmits data corresponding to the HQ layer and the LQ layer to the UE using the resource indicated by the PDCCH masked with XR-M-RNTI, but the data corresponding to the HQ layer and the data corresponding to the LQ layer. Classification may be performed based on dedicated indication information included in the XR-M-RNTI.

Here, when the resource of the PDSCH to be transmitted to a plurality of UEs is indicated based on the dedicated indication information, data corresponding to the LQ layer is transmitted through multicasting. When a resource of a PDSCH to be transmitted to a specific UE among a plurality of UEs is indicated based on the dedicated indication information, data corresponding to the HQ layer is transmitted through unicasting.

Although not limited thereto, the various proposals of the present invention described above may be applied to various fields requiring wireless communication/connection (eg, 5G) between devices.

Hereinafter, it will be exemplified in more detail with reference to the drawings. In the following drawings/descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise indicated.

4 illustrates a communication system applied to the present invention.

Referring to FIG. 4 , the communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device means a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, the wireless device includes a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 . For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The mobile device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like. Home appliances may include a TV, a refrigerator, a washing machine, and the like. The IoT device may include a sensor, a smart meter, and the like. For example, the base station and the network may be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200 . Artificial intelligence (AI) technology may be applied to the wireless devices 100a to 100f , and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300 . The network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network. The wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (e.g. sidelink communication) without passing through the base station/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (eg, Vehicle to Vehicle (V2V)/Vehicle to everything (V2X) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensor) or other wireless devices 100a to 100f.

Wireless communication/connection 150a and 150b may be performed between the wireless devices 100a to 100f/base station 200 - the base station 200/wireless devices 100a to 100f. Here, the wireless communication/connection may be performed through various radio access technologies (eg, 5G NR) for the uplink/downlink communication 150a and the sidelink communication 150b (or D2D communication). Through the wireless communication/connection 150a and 150b, the wireless device and the base station/wireless device may transmit/receive wireless signals to each other. For example, the wireless communication/connection 150a and 150b may transmit/receive signals through various physical channels based on all/part of the process of FIG. A1 . To this end, based on the various proposals of the present invention, various configuration information setting processes for wireless signal transmission/reception, various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.) , at least a part of a resource allocation process, etc. may be performed.

5 illustrates a wireless device that can be applied to the present invention.

Referring to FIG. 5 , the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {first wireless device 100, second wireless device 200} is {wireless device 100x, base station 200} of FIG. 4 and/or {wireless device 100x, wireless device 100x) } can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 . The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the functions, procedures and/or methods described/suggested above. For example, the processor 102 may process the information in the memory 104 to generate the first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 . In addition, the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store the information obtained from the signal processing of the second information/signal in the memory 104 . The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 . For example, the memory 104 may store software code including instructions for performing some or all of the processes controlled by the processor 102 , or for performing the procedures and/or methods described/suggested above. . Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled with the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 . The transceiver 106 may include a transmitter and/or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present invention, a wireless device may refer to a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 . The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the functions, procedures and/or methods described/suggested above. For example, the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 . In addition, the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 . The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 . For example, the memory 204 may store software code including instructions for performing some or all of the processes controlled by the processor 202, or for performing the procedures and/or methods described/suggested above. . Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 . The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present invention, a wireless device may refer to a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors 102 , 202 . For example, one or more processors 102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). The one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the functions, procedures, proposals and/or methods disclosed herein. One or more processors 102 , 202 may generate messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. The one or more processors 102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , to one or more transceivers 106 and 206 . The one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , PDUs, SDUs, and/or SDUs according to the functions, procedures, proposals and/or methods disclosed herein. , a message, control information, data or information can be obtained.

One or more processors 102 , 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors 102 , 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors 102 , 202 . The functions, procedures, proposals and/or methods disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. Firmware or software configured to perform the functions, procedures, proposals, and/or methods disclosed herein may be included in one or more processors 102, 202, or stored in one or more memories 104, 204, such that one or more processors 102, 202) can be driven. The functions, procedures, proposals and/or methods disclosed in this document may be implemented using firmware or software in the form of code, instructions, and/or a set of instructions.

One or more memories 104 , 204 may be coupled to one or more processors 102 , 202 and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions. The one or more memories 104 and 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof. One or more memories 104 , 204 may be located inside and/or external to one or more processors 102 , 202 . In addition, one or more memories 104 , 204 may be coupled to one or more processors 102 , 202 through various technologies, such as wired or wireless connections.

One or more transceivers 106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of this document to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, radio signals/channels, etc. referred to in the functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein, and the like, from one or more other devices. For example, one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may transmit and receive wireless signals. For example, one or more processors 102 , 202 may control one or more transceivers 106 , 206 to transmit user data, control information, or wireless signals to one or more other devices. In addition, one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, or wireless signals from one or more other devices. Further, one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208, and the one or more transceivers 106, 206 may be connected via one or more antennas 108, 208 to the functions, procedures, and procedures disclosed herein. , suggestions, methods and/or operation flowcharts, etc. may be set to transmit and receive user data, control information, radio signals/channels, and the like. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). The one or more transceivers 106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or more processors 102, 202. It can be converted into a baseband signal. One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 , 206 may include (analog) oscillators and/or filters.

6 illustrates a signal processing circuit for a transmission signal.

Referring to FIG. 6 , the signal processing circuit 1000 may include a scrambler 1010 , a modulator 1020 , a layer mapper 1030 , a precoder 1040 , a resource mapper 1050 , and a signal generator 1060 . have. Although not limited thereto, the operations/functions of FIG. 6 may be performed by the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 5 . The hardware elements of FIG. 6 may be implemented in processors 102 , 202 and/or transceivers 106 , 206 of FIG. 5 . For example, blocks 1010 to 1060 may be implemented in the processors 102 and 202 of FIG. 5 . Further, blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 5 , and block 1060 may be implemented in the transceivers 106 and 206 of FIG. 5 .

The codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 6 . Here, the codeword is a coded bit sequence of an information block. The information block may include a transport block (eg, a UL-SCH transport block, a DL-SCH transport block). The radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH) of FIG. A1 .

Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010 . A scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of a wireless device, and the like. The scrambled bit sequence may be modulated by a modulator 1020 into a modulation symbol sequence. The modulation method may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), and the like. The complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030 . Modulation symbols of each transport layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding). The output z of the precoder 1040 may be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M. Here, N is the number of antenna ports, and M is the number of transport layers. Here, the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transform) on the complex modulation symbols. Also, the precoder 1040 may perform precoding without performing transform precoding.

The resource mapper 1050 may map modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include a plurality of symbols (eg, a CP-OFDMA symbol, a DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain. The signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to another device through each antenna. To this end, the signal generator 1060 may include an Inverse Fast Fourier Transform (IFFT) module and a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, and the like. .

A signal processing process for a received signal in the wireless device may be configured in reverse of the signal processing process 1010 to 1060 of FIG. 6 . For example, the wireless device (eg, 100 and 200 of FIG. 5 ) may receive a wireless signal from the outside through an antenna port/transceiver. The received radio signal may be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Thereafter, the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a descrambling process. The codeword may be restored to the original information block through decoding. Accordingly, the signal processing circuit (not shown) for the received signal may include a signal reconstructor, a resource de-mapper, a post coder, a demodulator, a de-scrambler, and a decoder.

7 shows another example of a wireless device applied to the present invention. The wireless device may be implemented in various forms according to use-examples/services.

Referring to FIG. 7 , wireless devices 100 and 200 correspond to wireless devices 100 and 200 of FIG. 5 , and various elements, components, units/units, and/or modules may be used. ) may consist of For example, the wireless devices 100 and 200 may include a communication unit 110 , a control unit 120 , a memory unit 130 , and an additional element 140 . The communication unit may include communication circuitry 112 and transceiver(s) 114 . For example, communication circuitry 112 may include one or more processors 102,202 and/or one or more memories 104,204 of FIG. 5 . For example, transceiver(s) 114 may include one or more transceivers 106 , 206 and/or one or more antennas 108 , 208 of FIG. 5 . The control unit 120 is electrically connected to the communication unit 110 , the memory unit 130 , and the additional element 140 , and controls general operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130 . In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130 .

The additional element 140 may be configured in various ways according to the type of the wireless device. For example, the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit. Although not limited thereto, a wireless device may include a robot ( FIGS. 4 and 100a ), a vehicle ( FIGS. 4 , 100b-1 , 100b-2 ), an XR device ( FIGS. 4 and 100c ), a mobile device ( FIGS. 4 and 100d ), and a home appliance. (FIG. 4, 100e), IoT device (FIG. 4, 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It may be implemented in the form of an AI server/device ( FIGS. 4 and 400 ), a base station ( FIGS. 4 and 200 ), and a network node. The wireless device may be mobile or used in a fixed location depending on the use-example/service.

In FIG. 7 , various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be all interconnected through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110 . For example, in the wireless devices 100 and 200 , the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130 , 140 ) are connected to the communication unit 110 through the communication unit 110 . It can be connected wirelessly. In addition, each element, component, unit/unit, and/or module within the wireless device 100 , 200 may further include one or more elements. For example, the controller 120 may be configured with one or more processor sets. For example, the control unit 120 may be configured as a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, a memory control processor, and the like. As another example, the memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.

Hereinafter, the embodiment of FIG. 7 will be described in more detail with reference to the drawings.

8 illustrates an XR device applied to the present invention. The XR device may be implemented as an HMD, a head-up display (HUD) provided in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.

Referring to FIG. 8 , the XR device 100a may include a communication unit 110 , a control unit 120 , a memory unit 130 , an input/output unit 140a , a sensor unit 140b , and a power supply unit 140c . . Here, blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 of FIG. 7 , respectively.

The communication unit 110 may transmit/receive signals (eg, media data, control signals, etc.) to/from external devices such as other wireless devices, portable devices, or media servers. Media data may include images, images, sounds, and the like. The controller 120 may perform various operations by controlling the components of the XR device 100a. For example, the controller 120 may be configured to control and/or perform procedures such as video/image acquisition, (video/image) encoding, and metadata generation and processing. The memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the XR device 100a/creating an XR object. The input/output unit 140a may obtain control information, data, and the like from the outside, and may output the generated XR object. The input/output unit 140a may include a camera, a microphone, a user input unit, a display unit, a speaker, and/or a haptic module. The sensor unit 140b may obtain an XR device state, surrounding environment information, user information, and the like. The sensor unit 140b may include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an RGB sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, and/or a radar. have. The power supply unit 140c supplies power to the XR device 100a, and may include a wired/wireless charging circuit, a battery, and the like.

For example, the memory unit 130 of the XR device 100a may include information (eg, data, etc.) necessary for generating an XR object (eg, AR/VR/MR object). The input/output unit 140a may obtain a command to operate the XR device 100a from the user, and the controller 120 may drive the XR device 100a according to the user's driving command. For example, when the user wants to watch a movie or news through the XR device 100a, the controller 120 transmits the content request information to another device (eg, the mobile device 100b) through the communication unit 130 or can be sent to the media server. The communication unit 130 may download/stream contents such as movies and news from another device (eg, the portable device 100b) or a media server to the memory unit 130 . The controller 120 controls and/or performs procedures such as video/image acquisition, (video/image) encoding, and metadata generation/processing for the content, and is acquired through the input/output unit 140a/sensor unit 140b An XR object can be generated/output based on information about one surrounding space or a real object.

In addition, the XR device 100a is wirelessly connected to the portable device 100b through the communication unit 110 , and the operation of the XR device 100a may be controlled by the portable device 100b. For example, the portable device 100b may operate as a controller for the XR device 100a. To this end, the XR device 100a may obtain 3D location information of the portable device 100b, and then generate and output an XR object corresponding to the portable device 100b.

The present invention described above can be implemented as computer-readable code on a medium in which a program is recorded. The computer-readable medium includes all kinds of recording devices in which data readable by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. There is also a carrier wave (eg, transmission over the Internet) that includes implementation in the form of. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (20)

In a method for a base station to provide Layered XR in a wireless communication system,
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Using the resource of the PDSCH indicated by at least one PDCCH masked with at least one of XR-M-RNTI, C-RNTI, or CS-RNTI, data corresponding to the LQ layer and data corresponding to the HQ layer are transmitted to the UE to do;
including,
Data corresponding to the LQ layer is transmitted only through a resource indicated by a PDCCH masked with XR-M-RNTI.
According to claim 1,
When the XR-M-RNTI is masked to at least one of the plurality of PDCCHs and the C-RNTI or the CS-RNTI is masked to the rest of the plurality of PDCCHs,
Data corresponding to the LQ layer is transmitted to the UE using the resource indicated by the PDCCH masked with the XR-M-RNTI, and the remaining PDCCH in which the C-RNTI or CS-RNTI is masked uses resources indicated by , the data corresponding to the HQ layer is transmitted to the UE, the method.
3. The method of claim 2,
The XR-M-RNTI masked PDCCH is for indicating the resources of the PDSCH to be transmitted to a plurality of terminals.
4. The method of claim 3,
The method, wherein the C-RNTI or CS-RNTI masked PDCCH is for indicating the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.
5. The method of claim 4,
Data corresponding to the LQ layer is transmitted by multicasting using the resource of the PDSCH indicated by the PDCCH masked with the XR-M-RNTI.
5. The method of claim 4,
Data corresponding to the HQ layer is transmitted by unicasting using the resource of the PDSCH indicated by the PDCCH in which the C-RNTI or CS-RNTI is masked.
In a method for a base station to provide Layered XR in a wireless communication system,
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Data corresponding to the LQ layer is transmitted to the UE using the PDSCH resource indicated by the first PDCCH masked with XR-M-RNTI, and the second PDCCH masked with at least one of C-RNTI and CS-RNTI indicates transmitting data corresponding to the HQ layer to the UE by using the PDSCH resource;
A method comprising
8. The method of claim 7,
The XR-M-RNTI masked PDCCH is for indicating the resources of the PDSCH to be transmitted to a plurality of terminals.
9. The method of claim 8,
The method, wherein the C-RNTI or CS-RNTI masked PDCCH is for indicating the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.
10. The method of claim 9,
Data corresponding to the LQ layer is transmitted by multicasting using the resource of the PDSCH indicated by the PDCCH masked with the XR-M-RNTI.
10. The method of claim 9,
Data corresponding to the HQ layer is transmitted by unicasting using the resource of the PDSCH indicated by the PDCCH in which the C-RNTI or CS-RNTI is masked.
In a method for a base station to provide Layered XR in a wireless communication system,
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Transmitting data corresponding to the LQ layer and the HQ layer to the UE by multicasting or unicasting using a resource of a PDSCH indicated by one PDCCH masked with XR-M-RNTI;
A method comprising
13. The method of claim 12,
The XR-M-RNTI masked PDCCH is for indicating the resources of the PDSCH to be transmitted to a plurality of terminals.
14. The method of claim 13,
The PDCCH is allocated to each of a plurality of terminals and further includes dedicated indication information indicating a resource of a PDSCH to be transmitted in a UE-specific manner.
15. The method of claim 14,
When it is determined to indicate the resource of the PDSCH to be transmitted only to specific terminals based on the dedicated indication information, data corresponding to the LQ layer is transmitted by multicasting.
15. The method of claim 14,
When it is determined to indicate the resource of the PDSCH to be transmitted to a plurality of terminals based on the dedicated indication information, data corresponding to the HQ layer is transmitted by unicasting.
In a wireless communication system, as a base station for providing Layered XR,
The base station, one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors and storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to perform operations for providing a Layered XR service. Support, the actions are:
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Using the resource of the PDSCH indicated by at least one PDCCH masked with at least one of XR-M-RNTI, C-RNTI, or CS-RNTI, data corresponding to the LQ layer and data corresponding to the HQ layer are transmitted to the UE action,
including,
The base station, characterized in that the data corresponding to the LQ layer is transmitted only through the resource indicated by the PDCCH masked with XR-M-RNTI.
In a wireless communication system, as a base station for providing Layered XR,
The base station, one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to operate for providing a Layered XR service , and the operations are:
Operation of receiving a message requesting formation of a Layered XR bearer from the core network
Data corresponding to the LQ layer is transmitted to the UE using the PDSCH resource indicated by the first PDCCH masked with XR-M-RNTI, and the second PDCCH masked with at least one of C-RNTI and CS-RNTI indicates The operation of transmitting data corresponding to the HQ layer to the UE using the resources of the PDSCH,
Including, the base station.
In a wireless communication system, as a base station for providing Layered XR,
The base station, one or more transceivers; one or more processors; and one or more memories coupled to the one or more processors for storing instructions, wherein the instructions, when executed by the one or more processors, cause the one or more processors to operate for providing a Layered XR service , and the operations are:
Receiving a message requesting the formation of a Layered XR bearer from the core network;
An operation of transmitting data corresponding to the LQ layer and the HQ layer to the UE by multicasting or unicasting using the resources of the PDSCH indicated by one PDCCH masked with XR-M-RNTI
Including, the base station.
17. A computer system-readable recording medium in which a program for executing the method according to any one of claims 1 to 16 in a computer system is recorded.

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