KR102629543B1 - Method for providing layered xr service and base station therefor - Google Patents

Abstract

A method and base station for providing a layered XR service are disclosed. A method according to an embodiment of the present invention is a method in which a base station provides Layered XR in a wireless communication system, comprising: receiving a message requesting the formation of a Layered XR bearer from a core network; Using the resources 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. Including the step of, wherein data corresponding to the LQ layer is transmitted only through resources indicated by the PDCCH masked with XR-M-RNTI.

Description

Method and base station for providing Layered XR service {METHOD FOR PROVIDING LAYERED XR SERVICE AND BASE STATION THEREFOR}

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

Technologies to support XR services encompassing AR and VR technologies are being discussed in the 3GPP standard (Release 18). A Layered XR method is being proposed that divides and transmits data for XR services into several layers, and is characterized by separating the layer for providing basic services and the layer for providing high-quality services. For example, when providing a 360-degree VR service, data is transmitted by distinguishing between LQ (Low Quality) tiles and HQ (High Quality) tiles, HQ tiles are displayed according to the ROI determined by the user's gaze, and the remaining tiles are displayed. A method of displaying LQ tiles in an area is being proposed.

However, these XR services were typically provided only through unicasting. When the XR service is provided only through unicasting, problems arise in terms of cell capacity for specific cells, but no solution has been proposed. Therefore, in order to solve the problem in terms of cell capacity for a specific cell, the present invention proposes a new protocol that reduces cell capacity by distinguishing LQ tiles and HQ tiles into different layers and transmitting them in different ways.

For reference, looking at the prior art before 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 divided tile. It merely discloses the process of generating video streams of various resolutions by encoding them in parallel.

The present invention aims to solve the above-described needs and/or problems.

Additionally, the purpose of the present invention is to implement a method and base station for providing a layered XR service that can reduce the cell capacity for a specific cell required when providing an XR service.

A method for providing a Layered XR service according to an embodiment of the present invention is a method in which a base station provides Layered XR in a wireless communication system, comprising: receiving a message requesting the formation of a Layered XR bearer from a core network; Using the resources 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. However, data corresponding to the LQ layer can be transmitted only through resources indicated by the PDCCH masked with XR-M-RNTI.

In one embodiment, 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 remainder of the plurality of PDCCHs, the PDCCH to which the XR-M-RNTI is masked Using the resources indicated by , data corresponding to the LQ layer is transmitted to the UE, and using the resources indicated by the remaining PDCCH with the C-RNTI or CS-RNTI masked, data corresponding to the HQ layer is transmitted to the UE. can be transmitted.

In one embodiment, the PDCCH with the XR-M-RNTI masked may be used to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.

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

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

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

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

In one embodiment, the PDCCH with the XR-M-RNTI masked may be used to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.

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

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

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

A method for providing a Layered XR service according to another embodiment of the present invention is a method in which a base station provides Layered XR in a wireless communication system, comprising the steps of receiving a message requesting the formation of a Layered XR bearer from the core network. ; It includes transmitting data corresponding to the LQ layer and 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 one embodiment, the PDCCH with the XR-M-RNTI masked may be used to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.

In one embodiment, the PDCCH may further include dedicated indication information indicating PDSCH resources to be allocated to each of a plurality of terminals and transmitted in a UE-specific manner.

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

In one embodiment, when it is determined to indicate PDSCH resources to be transmitted to a plurality of terminals based on dedicated indication information, data corresponding to the HQ layer may be transmitted by 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, and the base station includes one or more transceivers; One or more processors; and one or more memory connected 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 an operation for providing a Layered XR service. and the above operations are:

An operation of receiving a message requesting the formation of a layered XR bearer from the core network, using the resources of the PDSCH indicated by at least one PDCCH masked with at least one of XR-M-RNTI, C-RNTI, or CS-RNTI, Including an operation of transmitting data corresponding to the LQ layer and data corresponding to the HQ layer to the UE, where the data corresponding to the LQ layer can be transmitted only through resources indicated by the PDCCH masked with XR-M-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, and the base station includes one or more transceivers; One or more processors; and one or more memory connected 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 an operation for providing a Layered XR service. The operations include: receiving a message requesting the formation of a Layered XR bearer from the core network, corresponding to the LQ layer using the resources of the PDSCH indicated by the first PDCCH with the XR-M-RNTI masked. It may include transmitting data to the UE and transmitting data corresponding to the HQ layer to the UE using the resources of the PDSCH indicated by the second PDCCH masked with at least one of C-RNTI or 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, and the base station includes one or more transceivers; One or more processors; and one or more memory connected 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 an operation for providing a Layered XR service. The operations include: receiving a message requesting the formation of a Layered XR bearer from the core network, LQ layer and HQ layer using the resources of the PDSCH indicated by one PDCCH masked with XR-M-RNTI It may include an operation of transmitting data corresponding to to the UE by multicasting or unicasting.

The effect of the method and 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 cell capacity for a specific cell by transmitting LQ tiles and HQ tiles separately in different layers. In particular, in the case of LQ tiles, they are transmitted to terminals belonging to at least one group in a multicasting manner, and in the case of HQ tiles, they are transmitted in a unicasting manner to specific terminals, thereby maintaining the quality of the XR service and minimizing cell capacity. It has excellent effects.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. .

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

Hereinafter, embodiments disclosed in the present invention will be described in detail with reference to the accompanying drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves. Additionally, 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 descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in the present invention, and the technical idea disclosed in the present invention is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components 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 said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Physical channels and typical signal transmission

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

When the terminal is turned on or enters a new cell, it performs an initial cell search task such as synchronizing with the base station (S11). To this end, the terminal can synchronize with the base station by receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station and obtain information such as a cell ID. Afterwards, the terminal can receive broadcast information within the cell by receiving a physical broadcast channel (PBCH) from the base station. Meanwhile, the terminal can check the downlink channel status by receiving a downlink reference signal (DL RS) in the initial cell search stage.

After completing the initial cell search, the terminal acquires more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to the information carried in the PDCCH. You can do it (S12).

Meanwhile, when accessing the base station for the first time or when there are no radio resources for signal transmission, the terminal can perform a random access procedure (RACH) on the base station (S13 to S16). To this end, the terminal transmits a specific sequence as a preamble through a physical random access channel (PRACH) (S13 and S15), and a response message (RAR (Random Access Response) message) can be received. In the case of contention-based RACH, a contention resolution procedure can be additionally performed (S16).

The terminal that has performed the above-described procedure will then perform 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) can be performed. In particular, the terminal can receive downlink control information (DCI) through PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and different formats may be applied depending on the purpose of use.

Meanwhile, the control information that the terminal transmits to the base station through uplink or that the terminal receives from the base station includes downlink/uplink ACK/NACK signals, CQI (Channel Quality Indicator), PMI (Precoding Matrix Index), and RI (Rank Indicator). ), etc. may be included. The terminal can transmit control information such as the above-described CQI/PMI/RI through PUSCH and/or PUCCH.

Structure of uplink and downlink channels

Downlink channel structure

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

(1) Physical downlink shared channel (PDSCH)

PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB), and modulation methods such as QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 64 QAM, and 256 QAM are used. Applies. A codeword is generated by encoding TB. 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 resources along with DMRS (Demodulation Reference Signal), generated as an OFDM symbol signal, and transmitted through the corresponding antenna port.

(2) Physical downlink control channel (PDCCH)

PDCCH carries downlink control information (DCI) and QPSK modulation method is applied. One PDCCH consists of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) depending on the AL (Aggregation Level). One CCE consists of six REGs (Resource Element Group). One REG is defined by one OFDM symbol and one (P)RB.

The terminal obtains DCI transmitted through the PDCCH by performing decoding (aka blind decoding) on a set of PDCCH candidates. The set of PDCCH candidates that the terminal decodes is defined as the PDCCH search space set. The search space set may be a common search space or a UE-specific search space. The UE can obtain DCI by monitoring PDCCH candidates within one or more search space sets set by MIB or higher layer signaling.

Uplink channel structure

The terminal transmits related signals to the base station through an uplink channel, which will be described later, and the base station will receive the related signals from the terminal through an uplink channel, which will be described later.

(1) Physical uplink shared channel (PUSCH)

PUSCH carries uplink data (e.g., 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) waveform, etc. are transmitted. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the terminal transmits the PUSCH by applying transform precoding. For example, if transform precoding is not possible (e.g., transform precoding is disabled), the terminal transmits PUSCH based on the CP-OFDM waveform, and if transform precoding is possible (e.g., transform precoding is enabled), the terminal transmits CP-OFDM. PUSCH can be transmitted based on the waveform or DFT-s-OFDM waveform. PUSCH transmission is scheduled dynamically by UL grant within DCI, or semi-statically based on upper layer (e.g., RRC) signaling (and/or Layer 1 (L1) signaling (e.g., PDCCH)). Can be scheduled (configured grant). PUSCH transmission can be performed based on codebook or non-codebook.

(2) Physical Uplink Control Channel (PUCCH)

PUCCH carries uplink control information, HARQ-ACK, and/or scheduling request (SR), and can be divided into multiple PUCCHs depending on the PUCCH transmission length.

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

Example 1

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

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

The request associated with the formation of a Layered XR bearer includes the following information:

- Configuration information for one multicasting bearer

- Configuration information for unicasting bearers of multiple UEs

The request associated with the formation of a Layered XR bearer may, in some cases, further include the following information:

- Group ID used with multicasting bearer

- UE ID of the UE associated with the group ID

The gNB sets parameters related to radio resources for providing a Layered XR bearer to a plurality of UEs and transmits an RRC message including the set parameters 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 this 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, parameters related to radio resources 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, RRC configuration information receives XR-M-RNTI in advance. For reference, even if information on C-RNTI or CS-RNTI is not transmitted in advance through S120, it is pre-recorded in the UE during the initial connection process between the UE and gNB and does not require separate transmission and reception.

Meanwhile, UEs that subsequently receive the scrambled or masked PDCCH descramble or demask the received PDCCH. Previously, the RNTI value masked to the PDCCH was defined as only one C-RNTI for unicasting and M-RNTI for multicasting in one time slot, so demasking was also performed only based on one RNTI and the portion masked with another RNTI. is determined to be something that does not exist, a so-called missing thing. 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 terminal selects one of the different RNTIs Missing something is bound to happen. One embodiment of the present invention relates to a case where two PDCCHs are transmitted in one time slot, and the UE not only demasks the XR-M-RNTI based on pre-transmitted or set RNTI information, but also demasks the C-RNTI or CS- Demasking can also be done for RNTI. Accordingly, missing items will not occur during demasking of the UE.

Meanwhile, in one embodiment, S120 may be implemented in response to receiving a request associated with Layered XR bearer formation received in S110. That is, in response to receiving a request related to Layered XR bearer formation, the gNB sets parameters related to radio resources for providing a Layered XR bearer to a plurality of UEs and sends an RRC message containing the set parameters to the UEs. It is to be transmitted. Below, S130 and S140 will be described in detail.

The gNB transmits the PDCCH to indicate the resources of the PDSCH to be transmitted to a plurality of UEs by masking it with XR-M-RNTI (S130).

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

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

Among the resources of the PDSCH, resources masked with the C-RNTI or CS-RNTI can 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 time-series or causally distinct, and the order of S130 and S140 may change depending on the case. In addition, the PDCCH masked with the XR-M-RNTI and the PDCCH masked with the C-RNTI or CS-RNTI mentioned in S130 and S140 may be transmitted simultaneously or immediately adjacent to each other 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 HQ tile to the UE using the resources of the PDSCH indicated by the masked PDCCHs (S150).

If 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 remainder of the plurality of PDCCHs, the resource indicated by the PDCCH on which the XR-M-RNTI is masked is used. 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, where 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 with the XR-M-RNTI masked indicates the resources of the PDSCH to be transmitted to multiple UEs, and the data corresponding to the LQ layer is multi-channel using the resources of the PDSCH indicated by the PDCCH with the XR-M-RNTI masked. Sent by casting.

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

Here, when masked with C-RNTI, the PDSCH resource is indicated one-time only in the corresponding subframe or a specifically designated subframe, and when masked with CS-RNTI, the PDSCH resource to be transmitted periodically in one or more subframes is indicated. .

That is, the present invention can transmit HQ tiles and LQ tiles to different layers using two PDCCHs. The LQ tile is transmitted through the LQ layer, and for this purpose, the gNB transmits the PDCCH masked with XR-M-RNTI to multiple UEs in one time slot along with the PDCCH masked with C-RNTI or CS-RNTI. . The UE that has received this can demask the PDCCHs through the configuration information related to the XR-M-RNTI included in the RRC configuration information and the previously received C-RNTI or CS-RNTI, and accordingly transmit the LQ tile and LQ tile to different layers. HQ tiles can be received.

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

Example 2

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

Embodiment 2, unlike Embodiment 1, is characterized by using one PDCCH masked with XR-M-RNTI. The XR-M-RNTI of Example 2 has the same terminology as the XR-M-RNTI of Example 1, but has different properties and functions. More specifically, the XR-M-RNTI of Embodiment 2, unlike the XR-M-RNTI of Embodiment 1, further has information for indicating the resource of the PDSCH to be transmitted in a UE-specific manner. Accordingly, the PDCCH used in Example 2 may have a larger size than the PDCCH in Example 1. Below, a method for providing Layered XR according to Example 2 will be described.

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

The gNB sets parameters related to radio resources for providing a Layered XR bearer to a plurality of UEs and transmits an RRC message including the set parameters to the UEs (S220). S220 corresponds to S210, and detailed description is omitted. However, as described above, the XR-M-RNTI included in S220 is different from the XR-M-RNTI included in S120 and must be distinguished from each other.

The gNB transmits the PDCCH to indicate the resources of the PDSCH to be transmitted to a plurality of UEs by masking it with XR-M-RNTI (S230).

Embodiment 2, unlike Embodiment 1, uses one PDCCH, and the one PDCCH is only masked with XR-M-RNTI and is not masked with C-RNTI or CS-RNTI. Instead, the XR-M-RNTI further includes information indicating the resources of the PDSCH to be transmitted exclusively for the terminal in order to distinguish between the resources of the PDSCH to be transmitted to a plurality of terminals and the resources of the PDSCH to be transmitted to a specific terminal. In other words, one PDCCH masked with the XR-M-RNTI of Example 2 can also refer to multicasting resources and unicasting resources, and so on, all can be referred to as one PDCCH. Accordingly, Embodiment 2 has the advantage of relieving the UE of the burden of having to demask the PDCCH twice, and also reducing the PDCCH's use of physical resources.

Information indicating the resources of the PDSCH to be transmitted exclusively for the terminal may be referred to as 'dedicated indication information'. The PDCCH masked with XR-M-RNTI indicates whether the PDSCH resource to be transmitted to a plurality of terminals is based on both the XR-M-RNTI and the dedicated indication information, or the PDSCH resource to be transmitted to specific terminals. What is indicated can be determined.

The gNB transmits the LQ tile and HQ tile to the UE using the resources of the PDSCH 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 resources indicated by one PDCCH with XR-M-RNTI masked. Here, data corresponding to the LQ layer uses the resources of the PDSCH to be transmitted to a plurality of terminals, and data corresponding to the HQ layer uses the resources of the PDSCH to be transmitted to specific terminals. At this time, whether the LQ layer and the HQ layer are used can be distinguished based on dedicated indication information. That is, the gNB transmits data corresponding to the HQ layer and LQ layer to the UE using resources 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 are transmitted to the UE. Classification can be made based on dedicated indication information included in the XR-M-RNTI.

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

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

Hereinafter, a more detailed example will be provided with reference to the drawings. In the following drawings/descriptions, identical reference numerals may illustrate identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise noted.

Figure 4 illustrates a communication system applied to the present invention.

Referring to Figure 4, the communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication/wireless/5G device. Although not limited thereto, wireless devices include robots (100a), vehicles (100b-1, 100b-2), XR (eXtended Reality) devices (100c), hand-held devices (100d), and home appliances (100e). ), IoT (Internet of Thing) device (100f), and AI device/server (400). For example, vehicles may include vehicles equipped with wireless communication functions, autonomous vehicles, vehicles capable of inter-vehicle communication, etc. 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, HMD (Head-Mounted Device), HUD (Head-Up Display) installed in vehicles, televisions, smartphones, It can be implemented in the form of computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Portable devices may include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), and computers (e.g., laptops, etc.). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, a base station and network may also be implemented as wireless devices, and a specific wireless device 200a may operate as a base station/network node for other wireless devices.

Wireless devices 100a to 100f may be connected to the network 300 through the base station 200. AI (Artificial Intelligence) technology may be applied to 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, 4G (eg, LTE) network, or 5G (eg, NR) network. 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 going through the base station/network. For example, vehicles 100b-1 and 100b-2 may communicate directly (e.g. V2V (Vehicle to Vehicle)/V2X (Vehicle to everything) communication). Additionally, an IoT device (eg, sensor) may communicate directly with another IoT device (eg, sensor) or another wireless device (100a to 100f).

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

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

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

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally 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 information in the memory 104 to generate first information/signal and then transmit a wireless signal including the first information/signal through the transceiver 106. Additionally, the processor 102 may receive a wireless signal including the second information/signal through the transceiver 106 and then store information obtained from 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, memory 104 may perform some or all of the processes controlled by processor 102, or may store software code including instructions for performing procedures and/or methods described/suggested above. . Here, the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). Transceiver 106 may be coupled to processor 102 and may transmit and/or receive wireless signals via one or more antennas 108. Transceiver 106 may include a transmitter and/or receiver. The transceiver 106 can be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may mean 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. Additionally, the processor 202 may receive a wireless 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, memory 204 may perform some or all of the processes controlled by processor 202, or may store software code including instructions for performing procedures and/or methods described/suggested above. . Here, the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). Transceiver 206 may be coupled to processor 202 and may transmit and/or receive wireless signals via one or more antennas 208. Transceiver 206 may include a transmitter and/or receiver. Transceiver 206 may be used interchangeably with an RF unit. In the present invention, a wireless device may mean a communication modem/circuit/chip.

Hereinafter, the 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 (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the functions, procedures, suggestions and/or methods disclosed herein. One or more processors 102, 202 may generate messages, control information, data or information according to the functions, procedures, suggestions and/or methods disclosed herein. One or more processors 102, 202 generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data or information according to the functions, procedures, suggestions and/or methods disclosed herein. , can be provided to one or more transceivers (106, 206). One or more processors (102, 202) may receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and transmit a PDU, SDU, or PDU according to the functions, procedures, suggestions, and/or methods disclosed herein. , messages, 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. As an 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 and 202. The functions, procedures, suggestions 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, etc. Firmware or software configured to perform the functions, procedures, suggestions and/or methods disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) to enable one or more processors (102, 202). 202). The functions, procedures, suggestions and or methods disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.

One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and/or instructions. One or more memories 104, 204 may consist 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 internal to and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be connected 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, wireless signals/channels, etc. mentioned in the methods and/or operation flowcharts of this document to one or more other devices. One or more transceivers 106, 206 may receive user data, control information, wireless signals/channels, etc. mentioned in the functions, procedures, proposals, methods and/or operational flowcharts disclosed herein, etc. from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 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. Additionally, 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. In addition, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may perform the functions and procedures disclosed in this document through one or more antennas (108, 208). , may be set to transmit and receive user data, control information, wireless signals/channels, etc. mentioned in the proposal, method and/or operation flowchart, etc. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (eg, antenna ports). One or more transceivers (106, 206) process the received user data, control information, wireless signals/channels, etc. using one or more processors (102, 202), and convert the received wireless signals/channels, etc. from the RF band signal. It can be converted to a baseband signal. One or more transceivers (106, 206) may convert user data, control information, wireless signals/channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 may comprise (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. there is. Although not limited thereto, the operations/functions of Figure 6 may be performed in the processors 102, 202 and/or transceivers 106, 206 of Figure 5. The hardware elements of Figure 6 may be implemented in the processors 102, 202 and/or transceivers 106, 206 of Figure 5. For example, blocks 1010 to 1060 may be implemented in processors 102 and 202 of FIG. 5 . Additionally, 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 can be converted into a wireless signal through the signal processing circuit 1000 of FIG. 6. Here, a codeword is an encoded bit sequence of an information block. The information block may include a transport block (eg, UL-SCH transport block, DL-SCH transport block). Wireless signals may be transmitted through various physical channels (eg, PUSCH, PDSCH) in Figure A1.

Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010. The scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device. The scrambled bit sequence may be modulated into a modulation symbol sequence by the modulator 1020. Modulation methods may include pi/2-BPSK (pi/2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030. The 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 can be obtained by multiplying the output y of the layer mapper 1030 with 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 transformation) on complex modulation symbols. Additionally, the precoder 1040 may perform precoding without performing transform precoding.

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

The signal processing process for the received signal in the wireless device may be configured as the reverse of the signal processing process (1010 to 1060) of FIG. 6. For example, a wireless device (eg, 100 and 200 in FIG. 5) may receive a wireless signal from the outside through an antenna port/transceiver. The received wireless signal can 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. Afterwards, the baseband signal can be restored to a codeword through a resource de-mapper process, postcoding process, demodulation process, and de-scramble process. The codeword can be restored to the original information block through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, resource de-mapper, postcoder, demodulator, de-scrambler, and decoder.

Figure 7 shows another example of a wireless device applied to the present invention. Wireless devices can be implemented in various forms depending on usage-examples/services.

Referring to FIG. 7, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 5 and include various elements, components, units/units, and/or modules. ) can be composed 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 and 202 and/or one or more memories 104 and 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. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls overall operations of the wireless device. For example, the control unit 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 (e.g., another communication device) through the communication unit 110 through a wireless/wired interface, or to the outside (e.g., to another communication device) through the communication unit 110. 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 depending on the type of 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, wireless devices include robots (FIG. 4, 100a), vehicles (FIG. 4, 100b-1, 100b-2), XR devices (FIG. 4, 100c), portable devices (FIG. 4, 100d), and home appliances. (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 can be implemented in the form of an AI server/device (FIG. 4, 400), a base station (FIG. 4, 200), a network node, etc. Wireless devices can be mobile or used in fixed locations depending on the usage/service.

In FIG. 7 , various elements, components, units/parts, and/or modules within the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least a portion may be wirelessly connected through the communication unit 110. For example, within 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 (e.g., 130 and 140) are connected through the communication unit 110. Can be connected wirelessly. Additionally, each element, component, unit/part, and/or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may be comprised of one or more processor sets. For example, the control unit 120 may be comprised of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, and a memory control processor. As another example, the memory unit 130 includes 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 implementation example of FIG. 7 will be described in more detail with reference to the drawings.

Figure 8 illustrates an XR device applied to the present invention. XR devices can be implemented as HMDs, HUDs (Head-Up Displays) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc.

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 and receive signals (eg, media data, control signals, etc.) with external devices such as other wireless devices, mobile devices, or media servers. Media data may include video, images, sound, etc. The control unit 120 may perform various operations by controlling the components of the XR device 100a. For example, the control unit 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, etc. from the outside and output the generated XR object. The input/output unit 140a may include a camera, microphone, user input unit, display unit, speaker, and/or haptic module. The sensor unit 140b can obtain XR device status, surrounding environment information, user information, etc. The sensor unit 140b may include a proximity sensor, an illumination 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. there is. The power supply unit 140c supplies power to the XR device 100a and may include a wired/wireless charging circuit, a battery, etc.

As an example, the memory unit 130 of the XR device 100a may include information (eg, data, etc.) necessary for creating an XR object (eg, AR/VR/MR object). The input/output unit 140a can obtain a command to operate the XR device 100a from the user, and the control unit 120 can drive the XR device 100a according to the user's driving command. For example, when a user tries to watch a movie, news, etc. through the XR device 100a, the control unit 120 sends content request information to another device (e.g., mobile device 100b) or It can be transmitted to a media server. The communication unit 130 may download/stream content such as movies and news from another device (eg, mobile device 100b) or a media server to the memory unit 130. The control unit 120 controls and/or performs procedures such as video/image acquisition, (video/image) encoding, and metadata creation/processing for the content, and acquires it through the input/output unit 140a/sensor unit 140b. XR objects can be created/output based on information about surrounding space or real objects.

Additionally, the XR device 100a is wirelessly connected to the mobile device 100b through the communication unit 110, and the operation of the XR device 100a can be controlled by the mobile device 100b. For example, the mobile 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 mobile device 100b and then generate and output an XR object corresponding to the mobile device 100b.

The present invention described above can be implemented as computer-readable code on a program-recorded medium. Computer-readable media includes all types of recording devices that store data that can be read by a computer system. Examples of computer-readable media include HDD (Hard Disk Drive), SSD (Solid State Disk), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. This also includes those implemented in the form of carrier waves (e.g., transmission via the Internet). Accordingly, the above detailed description should not be construed as restrictive in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (20)

In a wireless communication system, a method for a base station to provide Layered XR,
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Using the resources 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. steps;
Including,
Data corresponding to the LQ layer is transmitted only through resources indicated by the PDCCH masked with XR-M-RNTI,
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 remainder of the plurality of PDCCHs,
Data corresponding to the LQ layer is transmitted to the UE using the resources indicated by the PDCCH with the XR-M-RNTI masked, and using the resources indicated by the remaining PDCCH with the C-RNTI or CS-RNTI masked. , Method by which data corresponding to the HQ layer is transmitted to the UE.
delete According to paragraph 1,
A method in which the PDCCH with the XR-M-RNTI masked is for indicating the resources of the PDSCH to be transmitted to a plurality of terminals.
According to paragraph 3,
A method in which the PDCCH with the C-RNTI or CS-RNTI masked is used to indicate the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.
According to paragraph 4,
A method in which data corresponding to the LQ layer is transmitted by multicasting using the resources of the PDSCH indicated by the PDCCH in which the XR-M-RNTI is masked.
According to paragraph 4,
A method in which data corresponding to the HQ layer is transmitted by unicasting using the resources of the PDSCH indicated by the PDCCH in which the C-RNTI or CS-RNTI is masked.
In a wireless communication system, a method for a base station to provide Layered XR,
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 resources of the PDSCH indicated by the first PDCCH masked with the XR-M-RNTI, and the second PDCCH indicated by the second PDCCH masked with at least one of the C-RNTI or CS-RNTI is transmitted. Transmitting data corresponding to the HQ layer to the UE using PDSCH resources;
Including,
The PDCCH with XR-M-RNTI masked is intended to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.
A method in which the PDCCH with the C-RNTI or CS-RNTI masked is used to indicate the resource of the PDSCH to be transmitted to a specific terminal among a plurality of terminals.
delete delete In clause 7,
A method in which data corresponding to the LQ layer is transmitted by multicasting using the resources of the PDSCH indicated by the PDCCH in which the XR-M-RNTI is masked.
In clause 7,
A method in which data corresponding to the HQ layer is transmitted by unicasting using the resources of the PDSCH indicated by the PDCCH in which the C-RNTI or CS-RNTI is masked.
In a wireless communication system, a method for a base station to provide Layered XR,
Receiving a message requesting the formation of a Layered XR bearer from the core network;
Transmitting data corresponding to the LQ layer and 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 PDCCH with XR-M-RNTI masked is intended to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.
The PDCCH further includes dedicated indication information indicating resources of the PDSCH to be allocated to each of a plurality of terminals and transmitted in a UE-specific manner.
delete delete According to clause 12,
When it is determined to indicate PDSCH resources to be transmitted only to specific terminals based on dedicated indication information, data corresponding to the LQ layer is transmitted by multicasting.
According to clause 12,
If it is determined to indicate the resources of the PDSCH to be transmitted to a plurality of terminals based on the dedicated indication information, the data corresponding to the HQ layer is transmitted by unicasting.
In a wireless communication system, as a base station to provide Layered XR,
The base station includes one or more transceivers; One or more processors; and one or more memories connected to the one or more processors and storing instructions, which, when executed by the one or more processors, cause the one or more processors to perform operations for providing a Layered XR service. Supports the above operations:
An operation of receiving a message requesting the formation of a Layered XR bearer from the core network,
Using the resources 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,
Data corresponding to the LQ layer is transmitted only through resources indicated by the PDCCH masked with XR-M-RNTI,
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 remainder of the plurality of PDCCHs,
Data corresponding to the LQ layer is transmitted to the UE using the resources indicated by the PDCCH with the XR-M-RNTI masked, and using the resources indicated by the remaining PDCCH with the C-RNTI or CS-RNTI masked. , A base station wherein data corresponding to the HQ layer is transmitted to the UE.
In a wireless communication system, as a base station to provide Layered XR,
The base station includes one or more transceivers; One or more processors; and one or more memory connected 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 an operation for providing a Layered XR service. and the operations are:
Operation of 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 resources of the PDSCH indicated by the first PDCCH masked with the XR-M-RNTI, and the second PDCCH indicated by the second PDCCH masked with at least one of the C-RNTI or CS-RNTI is transmitted. An operation to transmit data corresponding to the HQ layer to the UE using PDSCH resources,
Including,
The PDCCH with XR-M-RNTI masked is intended to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.
A PDCCH with C-RNTI or CS-RNTI masked is used to indicate resources of a PDSCH to be transmitted to a specific terminal among a plurality of terminals.
In a wireless communication system, as a base station to provide Layered XR,
The base station includes one or more transceivers; One or more processors; and one or more memory connected 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 an operation for providing a Layered XR service. and the operations are:
An operation of receiving a message requesting the formation of a Layered XR bearer from the core network,
An operation to transmit data corresponding to the LQ layer and 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 PDCCH with XR-M-RNTI masked is intended to indicate the resources of the PDSCH to be transmitted to a plurality of terminals.
The PDCCH further includes dedicated indication information indicating the resource of the PDSCH to be allocated to each of a plurality of terminals and transmitted in a UE-specific manner.
A recording medium readable by a computer system on which a program for executing the method according to any one of claims 1, 3 to 7, 10 to 12, 15 and 16 on a computer system is recorded. .