WO2020145779A1 - Operating method and device of communication node in wireless communication system - Google Patents

Abstract

Provided are a method for MT setting and DU setting of a communication node in a wireless communication system, and a method and an apparatus for setting, by the communication node, a link direction of a resource to a child node thereof.

Description

Method and apparatus for operating a communication node in a wireless communication system

This disclosure relates to wireless communication.

As more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication compared to a conventional radio access technology (RAT). Massive Machine Type Communications (MTC), which provides a variety of services anytime, anywhere by connecting multiple devices and objects, is also one of the major issues to be considered in next-generation communication. In addition, a communication system design considering a service/terminal sensitive to reliability and latency is being discussed. The introduction of next-generation wireless access technology in consideration of such extended mobile broadband communication, massive MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is discussed, and in the present disclosure, for convenience, the corresponding technology (technology) Is called new RAT or NR.

One of the potential technologies that aims to enable future cellular network deployment scenarios and applications is the support of wireless backhaul and relay links, allowing the NR cells to be proportionally densified without the need to proportionally densify the transport network. It allows for flexible and very dense placement.

Integration with massive MIMO or native deployment of multi-beam systems is expected to be available with greater bandwidth in NR compared to LTE (e.g. millimeter wave spectrum) Opportunities for development and deployment of access and backhaul links are created. This makes it easier for a dense network of self-backhauled NR cells in a more integrated manner by establishing multiple control and data channels/procedures defined to provide access or access to terminals. Allow placement. Such a system is called integrated access and backhaul links (IAB).

The IAB system may be composed of a plurality of base stations and/or terminals, and discussions on resource setting or allocation methods for efficient transmission/reception operations between respective nodes and/or nodes and terminals are ongoing.

The technical problem to be solved through the present disclosure is to provide a resource setting method and apparatus performed by a communication node in a wireless communication system.

In the present disclosure, in addition to the semi-static configuration, the IAB node can dynamically configure resources by transmitting information related to resource configuration to other IAB nodes.

According to the present disclosure, an IAB node other than a donor IAB node dynamically sets resource direction to its child node, thereby increasing throughput and enabling more efficient communication between IAB nodes.

The effects obtainable through specific examples of the present specification are not limited to the effects listed above. For example, there may be various technical effects that a person having ordinary skill in the related art can understand or derive from this specification. Accordingly, the specific effects of the present specification are not limited to those explicitly described herein, and may include various effects that can be understood or derived from the technical features of the present specification.

1 illustrates a wireless communication system to which the present disclosure can be applied.

2 is a block diagram showing a radio protocol architecture for a user plane.

3 is a block diagram showing a radio protocol structure for a control plane.

4 illustrates a system structure of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

5 illustrates functional division between NG-RAN and 5GC.

6 illustrates a frame structure that can be applied in NR.

7 illustrates CORESET.

8 is a view showing a difference between a conventional control region and CORESET in NR.

9 shows an example of a frame structure for a new radio access technology.

10 is an abstract diagram of a hybrid beamforming structure from the perspective of a TXRU and a physical antenna.

11 is a diagram illustrating the beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process.

12 shows an example of a 5G usage scenario to which the technical features of the present disclosure can be applied.

13 schematically illustrates an example of a network with integrated access and backhaul links (IAB).

14 schematically shows an example of the configuration of access and backhaul links.

15 is for describing links and relationships between IAB nodes.

16 illustrates physical channels used in 3GPP system and general signal transmission.

17 is for explaining MT setup and DU setup.

18 is for explaining a method of obtaining a dynamic MT configuration according to the DU configuration.

19 is a flowchart of an example of a resource setting method of an IAB node according to some implementations of the present disclosure.

20 schematically illustrates an example to which a resource setting method of an IAB node according to some implementations of the present disclosure is applied.

21 illustrates a communication system 1 applied to the present disclosure.

22 illustrates a wireless device that can be applied to the present disclosure.

23 illustrates a signal processing circuit for a transmission signal.

24 shows another example of a wireless device applied to the present disclosure.

25 illustrates a portable device applied to the present disclosure.

26 illustrates a vehicle or autonomous vehicle applied to the present disclosure.

27 illustrates an AI device applied to the present disclosure.

In this specification, “A or B (A or B)” may mean “only A”, “only B”, or “both A and B”. In other words, “A or B (A or B)” in this specification may be interpreted as “A and/or B (A and/or B)”. For example, in this specification, “A, B or C (A, B or C)” means “only A”, “only B”, “only C”, or any combination of “A, B and C” ( any combination of A, B and C).

The slash (/) or comma (comma) used in this specification may mean “and/or” (and/or). For example, “A/B” may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”. For example, “A, B, C” may mean “A, B, or C”.

In this specification, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. Also, in this specification, the expression “at least one A or B (at least one of A and B)” or “at least one A and/or B (at least one of A and/or B)” means “at least one. A and B (at least one of A and B).

Also, in this specification, “at least one of A, B and C” means “only A”, “only B”, “only C”, or “A, B and C”. Any combination of (A, B and C). Also, “at least one of A, B and/or C” or “at least one of A, B and/or C” It may mean “at least one of A, B and C”.

Also, parentheses used in the present specification may mean “for example”. Specifically, when indicated as “control information (PDCCH)”, “PDCCH” may be proposed as an example of “control information”. In other words, “control information” in this specification is not limited to “PDCCH”, and “PDDCH” may be proposed as an example of “control information”. Further, even when indicated as “control information (ie, PDCCH)”, “PDCCH” may be proposed as an example of “control information”.

Technical features that are individually described in one drawing in the present specification may be individually or simultaneously implemented.

1 illustrates a wireless communication system to which the present disclosure can be applied. This may also be referred to as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network), or Long Term Evolution (LTE)/LTE-A system.

The E-UTRAN includes a base station (BS) that provides a control plane and a user plane to a user equipment (UE) 10. The terminal 10 may be fixed or mobile, and may be called other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. . The base station 20 refers to a fixed station communicating with the terminal 10, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.

The base stations 20 can be connected to each other through an X2 interface. The base station 20 is connected to an evolved packet core (EPC) 30 through an S1 interface, and more specifically, a mobility management entity (MME) through a S1-MME and a serving gateway (S-GW) through a S1-U.

EPC 30 is composed of MME, S-GW and P-GW (Packet Data Network-Gateway). The MME has information on the access information of the terminal or the capability of the terminal, and such information is mainly used for mobility management of the terminal. S-GW is a gateway with E-UTRAN as an endpoint, and P-GW is a gateway with PDN as an endpoint.

The layers of the radio interface protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems, L1 (first layer), It can be divided into L2 (second layer) and L3 (third layer). Among them, the physical layer belonging to the first layer provides an information transfer service using a physical channel. The radio resource control (RRC) layer located in the third layer serves to control radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

2 is a block diagram showing a radio protocol architecture for a user plane. 3 is a block diagram showing a radio protocol structure for a control plane. The user plane is a protocol stack for transmitting user data, and the control plane is a protocol stack for transmitting control signals.

2 and 3, a physical layer (PHY (physical) layer) provides an information transfer service (information transfer service) to the upper layer by using a physical channel (physical channel). The physical layer is connected to the upper layer, the medium access control (MAC) layer, through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how and with what characteristics data is transmitted through a wireless interface.

Data moves between different physical layers, that is, between physical layers of a transmitter and a receiver through a physical channel. The physical channel can be modulated by an Orthogonal Frequency Division Multiplexing (OFDM) method, and utilizes time and frequency as radio resources.

The functions of the MAC layer include mapping between logical channels and transport channels, and multiplexing/demultiplexing into transport blocks provided as physical channels on transport channels of MAC service data units (SDUs) belonging to logical channels. The MAC layer provides a service to a radio link control (RLC) layer through a logical channel.

The functions of the RLC layer include concatenation, segmentation and reassembly of RLC SDUs. In order to guarantee various quality of service (QoS) required by a radio bearer (RB), the RLC layer includes a transparent mode (TM), an unacknowledged mode (UM) and an acknowledgment mode (Acknowledged Mode). , AM). AM RLC provides error correction through automatic repeat request (ARQ).

RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for control of logical channels, transport channels, and physical channels in connection with configuration, re-configuration, and release of radio bearers. RB means a logical path provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the network.

The functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include the transfer of user data, header compression, and ciphering. The functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include transmission of control plane data and encryption/integrity protection.

The establishment of the RB means a process of defining characteristics of a radio protocol layer and a channel to provide a specific service, and setting each specific parameter and operation method. The RB can be divided into two types: a signaling RB (SRB) and a data RB (DRB). SRB is used as a channel for transmitting RRC messages in the control plane, and DRB is used as a channel for transmitting user data in the user plane.

When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in an RRC connected state, otherwise it is in an RRC idle state.

A downlink transport channel for transmitting data from a network to a terminal includes a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting user traffic or control messages. Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH, or may be transmitted through a separate downlink multicast channel (MCH). On the other hand, an uplink transport channel for transmitting data from a terminal to a network includes a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or a control message.

Logical channels that are above the transport channel and are mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic). Channel).

A physical channel is composed of several OFDM symbols in the time domain and several sub-carriers in the frequency domain. One sub-frame (Sub-frame) is composed of a plurality of OFDM symbols (Symbol) in the time domain. The resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of sub-carriers. In addition, each subframe may use specific subcarriers of specific OFDM symbols (eg, the first OFDM symbol) of a corresponding subframe for a physical downlink control channel (PDCCH), that is, an L1/L2 control channel. TTI (Transmission Time Interval) is a unit time of subframe transmission.

Hereinafter, a new radio access technology (new radio access technology: new RAT, NR) will be described.

As more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication compared to a conventional radio access technology (RAT). Massive Machine Type Communications (MTC), which provides a variety of services anytime, anywhere by connecting multiple devices and objects, is also one of the major issues to be considered in next-generation communication. In addition, a communication system design considering a service/terminal sensitive to reliability and latency is being discussed. The introduction of next-generation wireless access technology in consideration of such extended mobile broadband communication, massive MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is discussed, and in the present disclosure, for convenience, the corresponding technology (technology) Is called new RAT or NR.

4 illustrates a system structure of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

Referring to FIG. 4, the NG-RAN may include a gNB and/or eNB that provides a user plane and control plane protocol termination to a terminal. 4 illustrates a case in which only the gNB is included. The gNB and the eNB are connected to each other by an Xn interface. The gNB and the eNB are connected through a 5G Core Network (5GC) and an NG interface. More specifically, AMF (access and mobility management function) is connected through an NG-C interface, and UPF (user plane function) is connected through an NG-U interface.

5 illustrates functional division between NG-RAN and 5GC.

Referring to Figure 5, gNB is an inter-cell radio resource management (Inter Cell radio resource management (RRM)), radio bearer management (RB control), connection mobility control (Connection Mobility Control), radio admission control (Radio Admission Control) , Measurement configuration and provision (Measurement configuration & Provision), dynamic resource allocation (dynamic resource allocation), etc. can be provided. AMF can provide functions such as NAS security and idle state mobility processing. UPF may provide functions such as mobility anchoring and PDU processing. The Session Management Function (SMF) may provide functions such as terminal IP address allocation and PDU session control.

6 illustrates a frame structure that can be applied in NR.

Referring to FIG. 6, a frame may be composed of 10 milliseconds (ms), and may include 10 subframes composed of 1 ms.

One or a plurality of slots may be included in a subframe according to subcarrier spacing.

Table 1 below illustrates the subcarrier spacing configuration μ.

The following Table 2 illustrates the number of slots in a frame (N ^frameμ _slot ), the number of slots in a ^subframe (N ^subframeμ _slot ), the number of symbols in a ^slot (N ^slot _symb ), etc. according to the subcarrier spacing configuration μ .

In FIG. 6, µ=0, 1, and 2 are illustrated.

A physical downlink control channel (PDCCH) may be composed of one or more control channel elements (CCEs) as shown in Table 3 below.

Aggregation level Number of CCEs One One 2 2 4 4 8 8 16 16

That is, the PDCCH may be transmitted through a resource composed of 1, 2, 4, 8 or 16 CCEs. Here, CCE is composed of six resource element groups (REGs), and one REG is composed of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

Meanwhile, in NR, a new unit called a control resource set (CORESET) can be introduced. The terminal may receive the PDCCH in CORESET.

7 illustrates CORESET.

Referring to FIG. 7, CORESET is composed of N ^CORESET _RB resource blocks in the frequency domain and N ^CORESET _symb ∈ {1, 2, 3} symbols in the time domain. N ^CORESET _RB and N ^CORESET _symb may be provided by a base station through a higher layer signal. As illustrated in FIG. 7, a plurality of CCEs (or REGs) may be included in CORESET.

The UE may attempt to detect PDCCH in units of 1, 2, 4, 8 or 16 CCEs in CORESET. One or a plurality of CCEs capable of attempting PDCCH detection may be referred to as PDCCH candidates.

The terminal may receive a plurality of CORESETs.

8 is a view showing a difference between a conventional control region and CORESET in NR.

Referring to FIG. 8, a control area 800 in a conventional wireless communication system (eg, LTE/LTE-A) is configured over the entire system band used by a base station. All terminals, except for some terminals (for example, eMTC/NB-IoT terminals) supporting only a narrow band, receive radio signals in the entire system band of the base station in order to properly receive/decode control information transmitted by the base station. I should be able to.

On the other hand, in NR, the above-mentioned CORESET was introduced. CORESET (801, 802, 803) may be referred to as a radio resource for control information that the terminal should receive, and may use only a part of the entire system band. The base station can allocate CORESET to each terminal, and can transmit control information through the assigned CORESET. For example, in FIG. 8, the first CORESET 801 may be allocated to the terminal 1, the second CORESET 802 may be allocated to the second terminal, and the third CORESET 803 may be allocated to the terminal 3. The terminal in the NR can receive the control information of the base station even if it does not necessarily receive the entire system band.

In the CORESET, there may be a terminal-specific CORESET for transmitting terminal-specific control information and a common CORESET for transmitting control information common to all terminals.

Meanwhile, in the NR, high reliability may be required depending on an application field, and DCI (downlink control information) transmitted through a downlink control channel (eg, a physical downlink control channel: PDCCH) in such a situation. The target block error rate (BLER) for) may be significantly lower than in the prior art. As an example of a method for satisfying such a requirement that requires high reliability, the amount of content included in DCI may be reduced, and/or the amount of resources used for DCI transmission may be increased. . At this time, the resource may include at least one of a resource in the time domain, a resource in the frequency domain, a resource in the code domain, and a resource in the spatial domain.

The following technologies/features can be applied in NR.

<Self-contained subframe structure>

9 shows an example of a frame structure for a new radio access technology.

In NR, a structure in which a control channel and a data channel are time-division multiplexed (TDM) within one TTI is considered as one of the frame structures for the purpose of minimizing latency. Can be.

In FIG. 9, the hatched area indicates a downlink control area, and the black part indicates an uplink control area. An area without an indication may be used for downlink data (DL data) transmission, or may be used for uplink data (UL data) transmission. The characteristic of this structure is that downlink (DL) transmission and uplink (UL) transmission are sequentially performed in one subframe, DL data is transmitted in a subframe, and UL ACK/ NACK (Acknowledgement/Not-acknowledgement) is also available. As a result, when a data transmission error occurs, it takes less time to retransmit the data, thereby minimizing the latency of the final data transmission.

In this data and control TDM subframe structure (data and control TDMed subframe structure), the base station and the terminal type gap for the process of switching from the transmission mode to the reception mode or the process of switching from the reception mode to the transmission mode (time gap) ) Is required. To this end, in the self-contained subframe structure, some OFDM symbols at a time point of switching from DL to UL may be set as a guard period (GP).

<Analog beamforming #1>

In a millimeter wave (mmW), the wavelength is shortened, so that it is possible to install multiple antenna elements in the same area. That is, in the 30 GHz band, the wavelength is 1 cm, and it is possible to install a total of 100 antenna elements in a 2-dimensional arrangement at 0.5 wavelength intervals on a 5 by 5 cm panel. Therefore, in mmW, a plurality of antenna elements are used to increase beamforming (BF) gain to increase coverage or increase throughput.

In this case, having a Transceiver Unit (TXRU) to control transmission power and phase for each antenna element enables independent beamforming for each frequency resource. However, in order to install the TXRU on all of the 100 or more antenna elements, it has a problem of ineffectiveness in terms of price. Therefore, a method of mapping a plurality of antenna elements to one TXRU and adjusting a beam direction with an analog phase shifter is considered. This analog beamforming method has a disadvantage in that it can make only one beam direction in all bands and thus cannot perform frequency selective beamforming.

It is possible to consider hybrid beamforming (BB) having B TXRUs, which are fewer than Q antenna elements, as an intermediate form of digital beamforming (analog BF) and digital beamforming (analog BF). In this case, although there are differences depending on the connection scheme of the B TXRUs and Q antenna elements, the direction of beams that can be simultaneously transmitted is limited to B or less.

<Analog beamforming #2>

In the NR system, when a plurality of antennas are used, a hybrid beamforming technique combining digital beamforming and analog beamforming is emerging. At this time, analog beamforming (or RF beamforming) performs precoding (or combining) at the RF stage, which results in the number of RF chains and the number of D/A (or A/D) converters. It has the advantage of being able to achieve performance that is close to digital beamforming while reducing. For convenience, the hybrid beamforming structure may be represented by N TXRUs and M physical antennas. Then, the digital beamforming for the L data layers to be transmitted by the transmitting end can be represented by an N by L matrix, and the converted N digital signals are then converted into analog signals through TXRU. After conversion, analog beamforming represented by an M by N matrix is applied.

10 is an abstract diagram of a hybrid beamforming structure from the perspective of the TXRU and the physical antenna.

In FIG. 10, the number of digital beams is L, and the number of analog beams is N. Furthermore, in the NR system, the base station is designed to change the analog beamforming on a symbol-by-symbol basis, and considers a direction for supporting more efficient beamforming to a terminal located in a specific region. Further, when defining a specific N TXRU and M RF antennas as one antenna panel in FIG. 10, the NR system considers a method of introducing a plurality of antenna panels to which hybrid beamforming independent of each other is applicable. Is becoming.

When the base station utilizes a plurality of analog beams as described above, since an analog beam advantageous for signal reception may be different for each terminal, at least a specific subframe for a synchronization signal, system information, paging, and the like. Beam sweeping operation is being considered in which a plurality of analog beams to be applied by a base station is changed for each symbol so that all terminals have a reception opportunity.

11 is a diagram illustrating the beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process.

In FIG. 11, a physical resource (or physical channel) in which system information of an NR system is transmitted in a broadcasting method is designated as a physical broadcast channel (xPBCH). At this time, analog beams belonging to different antenna panels within one symbol can be simultaneously transmitted, and a single analog beam (corresponding to a specific antenna panel) is applied as illustrated in FIG. 11 to measure channels for each analog beam. A method of introducing a beam reference signal (Beam RS: BRS), which is a reference signal (RS) to be transmitted, is being discussed. The BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam. At this time, unlike the BRS, a synchronization signal or xPBCH can be transmitted by applying all analog beams in an analog beam group so that any UE can receive it well.

Meanwhile, NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and if the SCS is 30 kHz/60 kHz, it is dense-urban, lower latency. And a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz is supported to overcome phase noise.

The NR frequency band can be defined as a frequency range of two types (FR1, FR2). The numerical value of the frequency range may be changed, and for example, the frequency ranges of the two types (FR1, FR2) may be as shown in Table 4 below. For convenience of explanation, among the frequency ranges used in the NR system, FR1 may mean “sub 6GHz range”, and FR2 may mean “above 6GHz range” and may be called millimeter wave (mmW). .

Frequency Range designation Corresponding frequency range Subcarrier Spacing FR1 450MHz-6000MHz 15, 30, 60 kHz FR2 24250MHz-52600MHz 60, 120, 240 kHz

As described above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 may include a band of 410MHz to 7125MHz as shown in Table 5 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for a vehicle (eg, autonomous driving).

Frequency Range designation Corresponding frequency range Subcarrier Spacing FR1 410MHz-7125MHz 15, 30, 60 kHz FR2 24250MHz-52600MHz 60, 120, 240 kHz

12 shows an example of a 5G usage scenario to which the technical features of the present disclosure can be applied. The 5G usage scenario shown in FIG. 12 is merely exemplary, and the technical features of the present disclosure can be applied to other 5G usage scenarios not shown in FIG. 12.

Referring to FIG. 12, the three main requirements areas of 5G are (1) an enhanced mobile broadband (eMBB) area, (2) a large amount of machine type communication (mMTC) area, and ( 3) Ultra-reliable and low latency communications (URLLC) area. Some use cases may require multiple areas for optimization, and other use cases may focus on only one key performance indicator (KPI). 5G supports these various use cases in a flexible and reliable way.

eMBB focuses on improving overall data rate, latency, user density, capacity and coverage of mobile broadband access. eMBB targets throughput of about 10 Gbps. eMBB goes far beyond basic mobile Internet access and covers media and entertainment applications in rich interactive work, cloud or augmented reality. Data is one of the key drivers of 5G, and it may not be possible to see dedicated voice services for the first time in the 5G era. In 5G, voice is expected to be processed as an application simply using the data connection provided by the communication system. The main causes of increased traffic volume are increased content size and increased number of applications requiring high data rates. Streaming services (audio and video), interactive video and mobile internet connections will become more widely used as more devices connect to the internet. Many of these applications require always-on connectivity to push real-time information and notifications to users. Cloud storage and applications are rapidly increasing in mobile communication platforms, which can be applied to both work and entertainment. Cloud storage is a special use case that drives the growth of uplink data rates. 5G is also used for remote work on the cloud and requires much lower end-to-end delay to maintain a good user experience when a tactile interface is used. In entertainment, for example, cloud gaming and video streaming are another key factor in increasing demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets anywhere, including in high mobility environments such as trains, cars and airplanes. Another use case is augmented reality and information retrieval for entertainment. Here, augmented reality requires a very low delay and an instantaneous amount of data.

mMTC is designed to enable communication between large amounts of low-cost devices powered by batteries, and is intended to support applications such as smart metering, logistics, field and body sensors. mMTC targets 10 years of battery and/or 1 million devices per km2. mMTC enables seamless connection of embedded sensors in all fields and is one of the most anticipated 5G use cases. Potentially, by 2020, the number of IoT devices is expected to reach 20 billion. Industrial IoT is one of the areas where 5G plays a key role in enabling smart cities, asset tracking, smart utilities, agriculture and security infrastructure.

URLLC is ideal for vehicle communication, industrial control, factory automation, telesurgery, smart grid and public safety applications by allowing devices and machines to communicate with high reliability and very low latency and high availability. URLLC aims for a delay of about 1ms. URLLC includes new services that will transform the industry through ultra-reliable/low-latency links such as remote control of key infrastructure and autonomous vehicles. Reliability and level of delay are essential for smart grid control, industrial automation, robotics, drone control and coordination.

Next, the use cases included in the triangle of FIG. 12 will be described in more detail.

5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means to provide streams rated at hundreds of megabits per second to gigabit per second. Such fast speeds may be required to deliver TV in 4K (6K, 8K and higher) resolutions as well as virtual reality (VR) and augmented reality (AR). VR and AR applications include almost immersive sports events. Certain applications may require special network settings. For VR games, for example, game companies may need to integrate the core server with the network operator's edge network server to minimize latency.

Automotive is expected to be an important new driver for 5G, with many examples of use for mobile communications to vehicles. For example, entertainment for passengers simultaneously requires high capacity and high mobile broadband. The reason is that future users continue to expect high quality connections regardless of their location and speed. Another example of use in the automotive field is the augmented reality dashboard. The augmented reality contrast board allows the driver to identify objects in the dark over what is being viewed through the front window. The augmented reality dashboard superimposes information to inform the driver about the distance and movement of the object. In the future, wireless modules will enable communication between vehicles, exchange of information between the vehicle and the supporting infrastructure, and exchange of information between the vehicle and other connected devices (eg, devices carried by pedestrians). The safety system helps the driver reduce the risk of accidents by guiding alternative courses of action to make driving safer. The next step will be a remotely controlled vehicle or an autonomous vehicle. This requires very reliable and very fast communication between different autonomous vehicles and/or between the vehicle and the infrastructure. In the future, autonomous vehicles will perform all driving activities, and drivers will focus only on traffic beyond which the vehicle itself cannot identify. The technical requirements of autonomous vehicles require ultra-low delay and ultra-high-speed reliability to increase traffic safety to a level that cannot be achieved by humans.

Smart cities and smart homes, referred to as smart societies, will be embedded in high-density wireless sensor networks. The distributed network of intelligent sensors will identify the conditions for cost and energy efficient maintenance of a city or home. Similar settings can be made for each assumption. Temperature sensors, window and heating controllers, burglar alarms and consumer electronics are all connected wirelessly. Many of these sensors typically require low data rates, low power and low cost. However, for example, real-time HD video may be required in certain types of devices for surveillance.

The consumption and distribution of energy, including heat or gas, is highly decentralized, requiring automated control of a distributed sensor network. The smart grid interconnects these sensors using digital information and communication technologies to collect information and act accordingly. This information can include supplier and consumer behavior, so smart grids can improve efficiency, reliability, economics, production sustainability and the distribution of fuels like electricity in an automated way. The smart grid can be viewed as another sensor network with low latency.

The health sector has many applications that can benefit from mobile communications. The communication system can support telemedicine that provides clinical care from a distance. This helps to reduce barriers to distance and can improve access to medical services that are not continuously available in remote rural areas. It is also used to save lives in critical care and emergency situations. A wireless sensor network based on mobile communication can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring is expensive to install and maintain. Thus, the possibility of replacing the cable with a wireless link that can be reconfigured is an attractive opportunity in many industries. However, achieving this requires that the wireless connection operates with cable-like delay, reliability, and capacity, and that management is simplified. Low latency and very low error probability are new requirements that need to be connected to 5G.

Logistics and cargo tracking is an important use case for mobile communications that enables the tracking of inventory and packages from anywhere using location-based information systems. Logistics and cargo tracking use cases typically require low data rates, but require wide range and reliable location information.

Hereinafter, an integrated access and backhaul link (IAB) will be described. Meanwhile, hereinafter, for the convenience of description, the proposed method will be described based on a new RAT(NR) system. However, the range of the system to which the proposed method is applied can be extended to other systems such as a 3GPP LTE/LTE-A system in addition to the NR system.

One of the potential technologies that aims to enable future cellular network deployment scenarios and applications is the support of wireless backhaul and relay links, allowing the NR cells to be proportionally densified without the need to proportionally densify the transport network. It allows for flexible and very dense placement.

Integration with massive MIMO or native deployment of multi-beam systems is expected to be available with greater bandwidth in NR compared to LTE (e.g. millimeter wave spectrum) Opportunities for development and deployment of access and backhaul links are created. This makes it easier for a dense network of self-backhauled NR cells in a more integrated manner by establishing multiple control and data channels/procedures defined to provide access or access to terminals. Allow placement. Such a system is called integrated access and backhaul links (IAB).

In the present disclosure, the following is defined.

-AC(x): Access link between node (x) and terminal(s).

-BH(xy): backhaul link between node (x) and node (y).

In this case, the node may mean a donor gNB (DgNB) or a relay node (RN). Here, the DgNB or the donor node may be a gNB that provides a function to support backhaul for IAB nodes.

In addition, in the present disclosure, when relay node 1 and relay node 2 exist for convenience of description, relay node 1 relays data transmitted and received to and from relay node 2 through relay node 2 and backhaul link. 1 is referred to as a parent node of relay node 2, and relay node 2 is referred to as a child node of relay node 1.

The following drawings have been prepared to explain specific examples of the present specification. Since the names of specific devices or specific signal/message/field names described in the drawings are provided by way of example, the technical features of the present specification are not limited to the specific names used in the following drawings.

13 schematically illustrates an example of a network with integrated access and backhaul links (IAB).

According to FIG. 13, relay nodes (rTRPs) may multiplex access and backhaul links in time, frequency, or space (ie, beam-based operation).

The operations of different links may operate on the same frequency or different frequencies (which may also be referred to as'in-band' or'out-band' relays, respectively). Efficient support of out-of-band relays is important for some NR deployment scenarios, but of in-band operation involving tight interworking with access links operating on the same frequency to accommodate duplex restrictions and avoid/mitigate interference. It is very important to understand the requirements.

Furthermore, operating an NR system in the millimeter wave spectrum is a serious short-term that cannot be easily mitigated with current RRC-based handover mechanisms due to the larger time scale required to complete the procedure compared to short blocking. There are some unique challenges, including experiencing blocking. Overcoming short blocking in millimeter wave systems can require a fast RAN-based mechanism for switching between rTRPs that does not necessarily involve the inclusion of a core network. The aforementioned need for mitigation of short blocking for NR operation in the millimeter wave spectrum, along with the need for easier deployment of self-backhauled NR cells, is an integrated framework that allows fast switching of access and backhaul links ( framework). Over-the-air (OTA) coordination between rTRP can also be considered to mitigate interference and support end-to-end path selection and optimization.

The following requirements and aspects must be addressed by the IAB for NR.

-Efficient and flexible operation for in-band and out-of-band relaying in indoor and outdoor scenarios

-Multi-hop and redundant connections

-End-to-end path selection and optimization

-Support of high spectral efficiency backhaul links

-Support of legacy NR terminals

Legacy NR is designed to support half-duplex devices. As such, half-duplex in the IAB scenario may be supported and worthwhile. Furthermore, IAB devices with full duplex can also be considered.

In the IAB scenario, if each relay node (RN) does not have scheduling capability, the donor gNB (DgNB) must schedule the DgNB, related relay nodes, and all links between terminals. In other words, the DgNB needs to make a scheduling decision for all links by collecting traffic information from all relevant relay nodes, and then informs each relay node of the scheduling information.

On the other hand, distributed scheduling can be performed when each relay node has scheduling capability. Then, immediate scheduling of an uplink scheduling request of the terminal is possible, and a backhaul/access link can be more flexibly used by reflecting surrounding traffic conditions.

14 schematically shows an example of the configuration of access and backhaul links.

14 shows an example in which a backhaul link and an access link are configured when DgNB and IAB relay nodes (RNs) are present. RN(b) and RN(e) connect backhaul links, RN(c) connects backhaul links to RN(b), and RN(d) connects backhaul links to RN(c). .

According to FIG. 14, the DgNB not only receives the scheduling request of UE1 (UE1), but also receives scheduling requests of UE2 (UE2) and UE3 (UE3). Then, DgNB makes a scheduling decision of two backhaul links and three access links, and informs the scheduling results. Thus, such centralized scheduling includes scheduling delays and causes latency problems.

On the other hand, distributed scheduling can be performed if each relay node has scheduling capability. Then, an immediate scheduling for the uplink scheduling request of the terminal can be performed, and the backhaul/access links can be used more flexibly by reflecting surrounding traffic conditions.

15 is for describing links and relationships between IAB nodes.

15, IAB node 1 is connected to IAB node 2 and backhaul link A, for backhaul link A, IAB node 1 is a parent node of IAB node 2, and IAB node 2 is a child node of IAB node 1. In addition, IAB node 2 is connected to IAB node 3 and backhaul link B. For backhaul link B, IAB node 2 is a parent node of IAB node 3, and IAB node 3 is a child node of IAB node 2.

Here, each of the IAB nodes can perform two functions. One is mobile termination (MT), which maintains a wireless backhaul connection to the upper IAB node or donor node, and the other is a distributed unit (DU), which provides access connections with terminals or with the MT of the lower IAB node. Is to provide connectivity.

For example, from the perspective of IAB node 2, the DU of IAB node 2 functionally forms a backhaul link B with the MT of IAB node 3, while the MT of IAB node 2 functionally backs the DU of IAB node 1 with the DU of IAB node 2. Bears. Here, the child link of the DU of IAB node 2 may mean a backhaul link B between IAB node 2 and IAB node 3. In addition, here, the parent link of the MT of the IAB node 2 may mean a backhaul link A between the IAB node 2 and the IAB node 1.

16 illustrates physical channels used in 3GPP system and general signal transmission.

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. The information transmitted and received by 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 power is turned off again when the power is turned off, or newly entered the cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S11). To this end, the UE receives the PSCH (Primary Synchronization Channel) and the SSCH (Secondary Synchronization Channel) from the base station to synchronize with the base station, and obtains information such as cell identity (cell identity). In addition, the terminal may obtain a physical broadcast channel (Physical Broadcast Channel: PBCH) from the base station to obtain the broadcast information in the cell. In addition, the UE may check a downlink channel state by receiving a downlink reference signal (DL RS) in an initial cell search step.

After completing the initial cell search, the UE can obtain more detailed system information by receiving a physical downlink control channel (PDCCH) and a corresponding physical downlink shared channel (PDSCH) ( S12).

Then, the terminal may perform a random access procedure (Random Access Procedure) to complete the access to the base station (S13 ~ S16). Specifically, the UE may transmit a preamble through a physical random access channel (PRACH) (S13), and receive a random access response (RAR) for the preamble through a PDCCH and a corresponding PDSCH (S14). Thereafter, the UE transmits a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15), and performs a contention resolution procedure such as a PDCCH and a corresponding PDSCH. It can be (S16).

After performing the above-described procedure, the UE may perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH (Physical Uplink Control Channel) transmission (S18) as general uplink/downlink signal transmission procedures. Control information transmitted from the terminal to the base station is referred to as uplink control information (UCI).

UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and Request Acknowledgement/Negative-ACK), Scheduling Request (SR), Channel State Information (CSI), and the like. CSI includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a bank indication (RI). UCI is generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and data should be simultaneously transmitted. In addition, according to the request/instruction of the network, the UE may periodically transmit UCI through PUSCH.

Hereinafter, initial access of the IAB node will be described.

The IAB node may follow the same procedure as the initial access procedure of the terminal including cell search, system information acquisition, and random access in order to initially establish a connection with the parent node or donor node. SSB/CSI-RS based RRM measurement is the starting point for IAB node discovery and measurement.

How to avoid SSB setup collisions between IAB nodes, half-duplex limitations and multi-hop topologies, including feasibility of CSI-RS based IAB node discovery The discovery procedure between the IAB nodes that apply to should be considered. Considering the cell ID used by a given IAB node, the following two cases can be considered.

-Case 1: Donor node and IAB node share the same cell ID

-Case 2: Donor node and IAB node maintain separate cell IDs

Furthermore, a mechanism for multiplexing of RACH transmission from terminals and RACH transmission from IAB nodes should be further considered.

Hereinafter, the backhaul link measurement will be described.

Measurement of multiple backhaul links for link management and path selection should be considered. To support half-duplex restriction from the perspective of a given IAB node, the IAB uses candidate orthogonal backhaul links (after initial access) using resources orthogonal to those used by access terminals for cell detection and measurement. Support their detection and measurement. In this regard, the following may be further considered.

-TDM of multiple SSBs (for example, according to hop order, cell ID, etc.)

-SSB muting across IAB nodes

-Multiplexing of SSB for IAB nodes and access terminals in half-frame or across half-frames

-SSB transmission and additional IAB node discovery signal to be TDM (eg, CSI-RS)

-Use of off-raster SSB

-Different transmission periods for backhaul link detection and measurement compared to the period used by access terminals

Coordination mechanisms for different solutions should be further considered, including coordination mechanisms for measurement point and reference signal (RS) transmission for IAB nodes.

Enhancement of SMTC and CSI-RS configuration to support RRM measurement for IAB nodes may be considered.

Hereinafter, backhaul link management will be described.

The IAB node supports a mechanism for detecting/recovering backhaul link failure. Improvements in radio link monitoring reference signal (RSM) and related procedures for the IAB can be further considered.

Hereinafter, a mechanism for path change or transmission/reception in a plurality of backhaul links will be described.

Mechanisms for efficient route change or transmission/reception simultaneously in multiple backhaul links (e.g., multi-TRP operation and intra-frequency dual connectivity) Should be considered.

Hereinafter, scheduling of the backhaul and the access link will be described.

The downlink IAB node transmission (i.e., the transmission from the IAB node to the child IAB node served by the IAB node on the backhaul link and the IAB node from the access link to the terminals served by the IAB node) is the IAB node. Must be scheduled by yourself. Uplink IAB transmission (transmission from an IAB node to its parent node or donor node on a backhaul link) should be scheduled by the parent node or donor node.

Hereinafter, multiplexing of access and backhaul links will be described.

The IAB supports TDM, FDM and SDM between access and backhaul links at the IAB node according to the half-duplex limitation. A mechanism for efficient frequency division multiplexing (TDM/FDM)/spatial division multiplexing (SDM) multiplexing of access/backhaul traffic over multiple hops taking into account the IAB node half-duplex limitations should be considered. The following solutions for different multiplexing options can be further considered.

-Mechanism for orthogonal partitioning of time slots or frequency resources between access and backhaul links across one or more hops

-Utilization of different DL/UL slot settings for access and backhaul links

-DL and UL power control enhancement and timing requirements to allow intra-panel FDM and SDM of backhaul and access links

-Interference management including cross-link interference

Hereinafter, resource coordination will be described.

Mechanisms for scheduling coordination across IAB nodes/donor nodes and multiple backhaul hops, resource allocation and path selection should be considered. Coordination of resources (on frequency, slot/slot format side, etc.) between semi-static IAB nodes (on the timescale of RRC signaling) should be supported. The following aspects can be further considered.

-Distributed or centralized coordination mechanism

-Resource granularity of required signal (e.g., TDD setting pattern)

-Exchange of L1 (layer-1) and/or L3 (layer-3) measurements between IAB nodes

-Exchange of topology related information (e.g. hop order) affecting backhaul link physical layer design

-Adjust resources faster than semi-static adjustment (frequency, time in terms of slot/slot format, etc.)

Hereinafter, IAB node synchronization and timing alignment will be described.

The feasibility of over-the-air (OTA) synchronization and the effect of timing misalignment on IAB performance (eg, the number of hops that can be supported) should be considered. The mechanism for timing alignment across multi-hop NR-IAB networks should be considered. The IAB supports timing advance (TA)-based synchronization between IAB nodes, including across multiple backhaul hops. Improvements to existing timing alignment mechanisms should be considered additionally.

The following cases of transmission timing alignment across IAB nodes and donor nodes should be further considered.

-Case 1: Sorting downlink transmission timing across IAB nodes and donor nodes

-Case 2: Alignment of downlink and uplink transmission timing in the IAB node

-Case 3: Sorting downlink and uplink reception timing in the IAB node

-Case 4: In case of 3 in IAB node, in case of 2 in case of transmission

-Case 5: 1 for access link dimming in different time slots and 4 for backhaul link timing

The next level of alignment between IAB nodes/donor nodes or within IAB nodes should be considered.

-Slot-level alignment

-Symbol-level alignment

-Not sorted

TDM/FDM/SDM multiplexing of access and backhaul links, the impact of different cases on cross-link interference and the impact of access terminals can be further considered.

Hereinafter, cross-link interference measurement and management will be described.

The impact of cross-link interference (CLI) on access and backhaul links (including spanning multiple hops) should be considered. Furthermore, interference measurement and management solutions should be considered.

Hereinafter, CLI mitigation techniques will be described.

CLI mitigation techniques, including advanced receiver and transmitter coordination, should be considered and prioritized in terms of complexity and performance. CLI mitigation technology should be able to manage the following IAB-node interference scenarios.

-Case 1: The victim IAB node receives downlink through its MT, and the interfering IAB node transmits uplink through its MT.

-Case 2: The victim IAB node receives downlink through its MT, and the interfering IAB node transmits downlink through its DU.

-Case 3: The victim IAB node receives uplink through its DU, and the interfering IAB node transmits uplink through its MT.

-Case 4: The victim IAB node receives uplink through its DU, and the interfering IAB node transmits downlink through its DU.

For FDM/SDM reception between access and backhaul links at a given IAB node, the interference experienced by the IAB node should be further considered.

Hereinafter, spectral efficiency enhancement will be described.

Support for 1024 quadrature amplitude modulation (QAM) for the backhaul link should be considered.

Hereinafter, the proposals of the present disclosure will be described.

The settings, operation, and other features of the present disclosure will be understood by the embodiments of the present disclosure described with reference to the accompanying drawings.

The contents of the present disclosure are described on the assumption of an in-band environment, but can also be applied in an out-band environment. In addition, the content of the present disclosure is described in consideration of an environment in which a donor gNB (Dnorb, DgNB), a relay node (RN), and/or a terminal operates in a half-duplex operation, DgNB, RN, and / or the terminal may be applied in an environment in which full-duplex (full-duplex) operation.

The discovery signal referred to in the present disclosure is a signal transmitted by an IAB node, and means a signal transmitted by other IAB nodes or terminals so that they can discover themselves.

The discovery signal is in the form of a synchronization signal block (synchronization signal/physical broadcast channel (PBCH) block, synchronization signal block (SSB)) of the NR or a channel status information-reference signal (CSI-RS) or other signal of the NR. It can take the form of Alternatively, the discovery signal may be a newly designed signal.

The contents of the present disclosure mainly describe the contents of the IAB node discovering other IAB nodes, but can also be applied when the terminal discovers IAB nodes.

On the other hand, from the IAB node MT perspective, the following time domain resources may be indicated for the parent link.

-Downlink (DL) time resource

-Uplink (UL) time resource

-Flexible (F) time resources

From the IAB node DU perspective, a child link has the following time resource types.

-Downlink (DL) time resource

-Uplink (UL) time resource

-Flexible (F) time resources

-Not-available (NA) time resources (resources not used for communication on DU child link)

Meanwhile, each of the downlink time resource, the uplink time resource, and the flexible time resource of the DU child link may belong to one of the following two categories.

-Hard resource: Time resource always available for DU child link

-Soft resource: A time resource whose availability of a time resource for a DU child link is explicitly or implicitly controlled by the parent node.

On the other hand, the above is only an arbitrary classification, and the resource types from the perspective of the IAB node DU are UL, DL, F, and the setting for availability may be classified into NA, hard resource, and soft resource, respectively. Specifically, the IAB node may receive resource configuration information, where the resource configuration information may include link direction information and availability information. Here, the link direction information may indicate whether a specific resource type is UL, DL or F, and availability information may indicate whether a specific resource is a hard resource or a soft resource. Alternatively, the link direction information may indicate whether a specific resource type is UL, DL, F, or NA, and availability information may indicate whether a specific resource is a hard resource or a soft resource.

As described above, there are four types of time resources of DL, UL, F and NA for a child link from the perspective of an IAB node DU. The NA time resource means a resource that is not used for communication on the DU child link.

Each of the DL, UL, and F time resources of the DU child link may be a hard resource or a soft resource. The hard resource may mean a resource that is always available for communication on the DU child link. However, the soft resource may be a resource whose availability for communication on the DU child link is explicitly and/or implicitly controlled by the parent node.

In this specification, a setting for a link direction and a link availability of a time resource for a DU child link may be referred to as a DU setting. DU configuration can be used for effective multiplexing and interference handling between IAB nodes. For example, the DU configuration can be used to indicate which link is a valid link for a time resource between a parent link and a child link. In addition, only a subset of child nodes can be used for interference coordination between child nodes by setting the time resource to be used for DU operation. Taking this aspect into account, DU setup can be more effective when configured semi-statically.

Meanwhile, similar to the slot format indication (SFI) setting for the access link, the IAB node MT may have three types of time resources: DL, UL, and F for its parent link.

17 is for explaining MT setup and DU setup.

Referring to FIG. 17, there are IAB node A, IAB node B, and IAB node C, the parent node of IAB node B is IAB node A, and the child node of IAB node B is IAB node C.

Referring to FIG. 17, an IAB node may receive an MT setting indicating link direction information for a parent node and a parent link therebetween for communication with its parent node. In addition, the IAB node may receive a DU setting informing link direction and availability information that can be used for communication with its child node.

Here, as an example, the MT setting of IAB node B includes link direction information from the IAB node B position for the link between IAB node A and IAB node B, and the DU setting of IAB node B is IAB node B and IAB node C It may include link direction and availability information from the IAB node B point of view of the inter-link. In addition, the MT setting of IAB node C includes the link direction from the IAB node C position to the link between IAB node B and IAB node C, and the DU setting of IAB node C is to the child node of IAB node C or the IAB node C It may include link direction and availability information from the IAB node C position for the link between the connected terminal and the IAB node C.

In addition, here, as an example, an operation performed by IAB node B on IAB node C, which is its child node, may be referred to as a DU operation of IAB node B. Also, an operation performed by IAB node B on IAB node A, which is its parent node, may be referred to as an MT operation of IAB node B.

Meanwhile, referring to FIG. 17, the DU resource of the IAB node B may mean the resource of the IAB node B for the link between the IAB node B and the IAB node C. Here, the link direction and availability of the DU resource of the IAB node B may be determined by the DU setting received by the IAB node B. In addition, the MT resource of the IAB node B may refer to the resource of the IAB node B for the link between the IAB node B and the IAB node A. Here, the link direction of the MT resource of the IAB node B may be determined by the MT setting received by the IAB node B.

Hereinafter, the proposal of the present disclosure will be described in more detail.

First, the DU setting of the IAB node will be described.

The IAB node can obtain its DU configuration as follows.

[Method 1-1] The IAB node can obtain its own DU setting through system information (SI) transmitted by the parent node. In this case, all IAB nodes that have a connection with the same parent node have the same DU configuration.

[Method 1-2] The IAB node can obtain its own DU configuration through the IRC node-specific RRC transmitted by the parent node. In this case, even if a connection is established with the same parent node, it is possible to have different DU settings between the IAB nodes.

[Method 1-3] The IAB node obtains the initial DU setting through system information, and then may reset its DU setting through the IAB node-specific RRC for the DU setting. In this case, if the DU setting is reset through RRC, even if a connection is established with the same parent node, different DU settings between IAB nodes can be obtained.

[Method 1-4] The IAB node can obtain the DU setting through system information. Thereafter, during DU configuration, hard/soft information for DL, UL, and F regions may be reset through an IAB node-specific RRC.

Next, the MT setting of the IAB node will be described.

As an example, the setting for the link direction of the parent node time resource may be referred to as MT setting. This setting may be based on the SFI (slot format information) setting for the access link. For access link SFI settings, both semi-static and dynamic settings are used. For a semi-static configuration, a cell-specific configuration based on system information is preferentially transmitted, and a slot format for a flexible area set by system information may be overridden by a terminal-specific RRC configuration. In addition, the dynamic configuration by the group common PDCCH can set a slot format for semi-statically configured flexible resources. Similar mechanisms can be applied for MT setup.

The relationship between slot format setting for an access terminal based on system information and MT setting for a child node based on system information is one element to be clarified. For example, the slot format setting for the access terminal by the system information may be applied to the MT setting, or may be set independently of each other.

When considering the above, that is, when the IAB node receives its MT setting through system information, the MT setting may be as follows.

[Method 2-1] SFI setting information for an access terminal transmitted as system information may mean MT setting for a child IAB node. That is, the IAB node recognizes that when its parent node transmits the SFI setting for the access terminal as system information, it is its (initial) MT setting.

[Method 2-2] The MT setting for the child IAB node transmitted as system information may be independent of the SFI setting information for the access terminal transmitted as system information. Therefore, the IAB node receives its (initial) MT setting from the system information transmitted by the parent node separately from the access terminal.

In other words, in the case of [Method 2-1], the SFI setting of the access terminal obtained through the system information transmitted by the parent node of the IAB node to the access terminal of the IAB node is determined as its MT setting. On the other hand, in the case of [Method 2-2], the parent node of the IAB node directly transmits system information including the MT setting to the IAB node, and the IAB node directly acquires the MT setting.

Hereinafter, a method for acquiring dynamic MT settings according to DU settings will be described.

For the flexible resource set by the SFI setting for the access terminal and the semi-static MT setting for the IAB node, the parent node can dynamically determine and indicate the link direction by Layer-1 (L1) signaling. From the perspective of the parent node, the link direction determination for the flexible resource should be based on its own DU configuration.

18 is for explaining a method of obtaining a dynamic MT configuration according to the DU configuration.

Referring to FIG. 18, the IAB node is connected to each of the parent node and the child node by a parent link and a child link.

Referring to FIG. 18, for example, from the perspective of an IAB node, a resource of a child node may be configured as flexible by setting MT. Then, if the resource is set as a downlink resource by setting its own DU, the resource cannot be set as uplink by dynamic MT setting.

In other words, referring to FIG. 18, the IAB node may receive a DU setting for a link with a child node. Also, the child node may receive the MT setting for the link with the IAB node. For example, for a specific time resource, the child node may be configured as uplink by MT setup, and the IAB node may be configured as downlink by DU setup. In this case, on the specific time resource, the IAB node can transmit a downlink signal to the child node, and the child node can receive the downlink signal.

Meanwhile, in the example of FIG. 18, each of the DU setting of the IAB node and the MT setting of the child node may be determined by the donor gNB. That is, after each of the DU setting of the IAB node and the MT setting of the child node is determined by the donor gNB, the DU setting of the IAB node is transmitted from the parent node to the IAB node, and the MT setting of the child node is transmitted from the IAB node to the child node. do.

The table below shows a resource direction that can be set for the flexible resource based on the DU setting.

DU settings Link direction configurable to child node/access terminal DL DL, F UL UL, F F DL, UL, F NA (not available) DL, UL, F

That is, the IAB node should consider setting its own DU when dynamically setting the link direction (downlink, uplink or flexible) for the flexible resource to the child node. The IAB node cannot be dynamically set to uplink to a child node from a resource configured as downlink by DU configuration, or can be set only to downlink. In addition, it is not possible to dynamically set a downlink to a child node from a resource configured as uplink by DU configuration, or only to set uplink. In the resource set as flexible by the DU setting, one of the uplink, downlink, and flexible can be dynamically set to the child node.

The parent node may implicitly set the link direction for the flexible resource by the DL grant/UL grant. In this case, similar to the above, the determined resource direction should consider its own DL configuration. That is, in a resource in which the DU setting is downlink, the IAB node may set the DL grant so that only downlink data is transmitted from the flexible resource of the child node. In addition, in a resource in which the DU setting is uplink, the IAB node may set the UL grant so that only uplink data is transmitted from the flexible resource of the child node.

The link direction (downlink, uplink or flexible) of each resource is determined by the DU setting, and availability (hard, soft, or not available (NA)) of each resource may be additionally determined. Even if it is a resource, the link direction can be set together, considering this case, when the IAB node dynamically sets the resource direction (DL, UL, or F) for the MT flexible resource of the child node, and sets the DU for the NA resource The MT's link direction can be determined according to the DU link direction set by ie, the link direction can be dynamically set for the flexible resource of the child node according to the link direction regardless of availability determined by the DU setting. The IAB node cannot dynamically set uplink to a child node or set only downlink from a resource set to DL as a DU setting, or dynamically downlink to a child node from a resource set uplink by DU setting. It cannot be configured as a link or can be configured only as an uplink In a resource configured as flexible by DU configuration, a child node can be dynamically configured as one of downlink, uplink, and flexible.

19 is a flowchart of an example of a resource setting method of an IAB node according to some implementations of the present disclosure.

Referring to FIG. 19, the IAB node receives first resource configuration information generated by the donor IAB node (S1910 ).

Thereafter, the IAB node transmits second resource configuration information to the child node of the IAB node (S1920).

Here, the first resource setting information is information (for example, DU setting) that informs the IAB node of the link direction and availability type of the resource of the IAB node for the link between the child node and the IAB node. Can.

In addition, the second resource configuration information may be information (eg, DCI, L1 signaling, etc.) that informs the child node of a link direction of a resource set as a flexible resource to the child node for the link.

20 schematically illustrates an example to which a resource setting method of an IAB node according to some implementations of the present disclosure is applied. In FIG. 20, D denotes downlink, U denotes uplink, and F denotes flexible.

FIG. 20 shows the link direction of D, D, D, F, F, F, U, U, U in time order by setting DU for time resources from symbol N to symbol N+8. , The child node of the IAB node assumes a situation in which the link directions of D, D, F, F, F, F, F, U, and U are set in chronological order by MT setting. Here, the DU setting may be the first resource setting information of FIG. 19.

In this case, the IAB node may transmit link direction setting information to the child node. Here, the link direction setting information may be L1 signaling or second resource setting information of FIG. 19.

Referring to FIG. 19, symbol N+2 is set as a downlink resource for the IAB node and flexible resource for the child node. Here, the IAB node may transmit link direction setting information indicating the link direction for the symbol N+2 to the child node. Here, the link direction setting information may indicate that the symbol N+2 is downlink or flexible, but is not set to indicate that the symbol is uplink.

In addition, symbols N+3 to N+5 are set as flexible resources for both the IAB node and the child node. Here, the IAB node may transmit link direction setting information indicating a link direction for symbols N+3 to N+5 to the child node. Here, the link direction setting information may indicate that each of the symbols N+3 to N+5 is one of downlink, uplink, or flexible.

In addition, symbol N+6 is set as an uplink resource for the IAB node and flexible resource for the child node. Here, the IAB node may transmit link direction setting information indicating the link direction for the symbol N+6 to the child node. Here, the link direction setting information may indicate that the symbol N+6 is uplink or flexible, but is not set to indicate that it is a downlink.

Although not illustrated in FIG. 20, some or all of symbols N+2 to N+6 set as flexible resources for a child node may be set as unavailable (NA) resources by setting a DU for an IAB node. In this case, for a resource set as an unavailable resource, the IAB node may transmit link direction setting information to the child node. Here, the link direction setting information may indicate that a resource set as an unavailable resource by DU setting is one of downlink, uplink, or flexible for the child node.

The claims described herein can be combined in various ways. For example, the technical features of the method claims of the present specification may be combined and implemented as a device, and the technical features of the device claims of the specification may be combined and implemented as a method. Further, the technical features of the method claims of the present specification and the technical features of the device claims may be combined and implemented as a device, and the technical features of the method claims of the specification and the device claims of the present specification may be combined and implemented as a method.

The methods proposed herein include at least one computer readable medium including instructions based on execution by at least one processor, in addition to the IAB node, and at least one computer readable medium. A processor and one or more memory operably connected by the one or more processors, and storing one or more instructions, wherein the one or more processors control the IAB node to execute the instructions to perform the methods proposed herein It may also be performed by a device (apparatus) set to.

Hereinafter, an example of a communication system to which the present disclosure is applied will be described.

Without being limited thereto, various descriptions, functions, procedures, suggestions, methods and/or operational flowcharts of the present disclosure disclosed in this document may be applied to various fields requiring wireless communication/connection (eg, 5G) between devices. have.

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

21 illustrates a communication system 1 applied to the present disclosure.

Referring to FIG. 21, the communication system 1 applied to the present disclosure 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), Long Term Evolution (LTE)), and may be referred to as a communication/wireless/5G device. Although not limited to this, the wireless device includes a robot 100a, a vehicle 100b-1, 100b-2, an XR (eXtended Reality) device 100c, a hand-held device 100d, and a home appliance 100e. ), Internet of Thing (IoT) device 100f, and 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 a UAV (Unmanned Aerial Vehicle) (eg, a drone). XR devices include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices, Head-Mounted Device (HMD), Head-Up Display (HUD) provided in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, or 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 notebook, etc.). Household appliances may include a TV, a refrigerator, and a washing machine. IoT devices may include sensors, smart meters, and the like. For example, the base station and the network may also be implemented as wireless devices, and the 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. AI (Artificial Intelligence) 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 directly communicate (e.g. sidelink communication) without going through the base station/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. Vehicle to Vehicle (V2V)/Vehicle to everything (V2X) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

Wireless communication/connections 150a, 150b, and 150c may be achieved between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200. Here, the wireless communication/connection is various wireless access such as uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), base station communication 150c (eg relay, IAB (Integrated Access Backhaul)). It can be achieved through technology (eg, 5G NR), and wireless devices/base stations/wireless devices, base stations and base stations can transmit/receive radio signals to each other through wireless communication/connections 150a, 150b, 150c. For example, wireless communication/connections 150a, 150b, and 150c may transmit/receive signals over various physical channels.To this end, based on various proposals of the present disclosure, for transmitting/receiving wireless signals, At least some of various configuration information setting processes, various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), resource allocation processes, and the like may be performed.

Hereinafter, an example of a wireless device to which the present disclosure is applied will be described.

22 illustrates a wireless device that can be applied to the present disclosure.

Referring to FIG. 22, the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR). Here, {the first wireless device 100, the second wireless device 200} is {wireless device 100x, base station 200} and/or {wireless device 100x), wireless device 100x in FIG. }.

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 transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate the first information/signal, and then transmit the wireless signal including the first information/signal through the transceiver 106. In addition, the processor 102 may receive the wireless signal including the second information/signal through the transceiver 106 and 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, memory 104 may be used to perform some or all of the processes controlled by processor 102, or instructions to perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. You can store software code that includes Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 can be coupled to the processor 102 and can transmit and/or receive wireless signals through one or more antennas 108. The transceiver 106 may include a transmitter and/or receiver. The transceiver 106 may be mixed with a radio frequency (RF) unit. In the present disclosure, the 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. Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. For example, the processor 202 may process 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 wireless signal including the fourth information/signal through the transceiver 206 and store the information obtained from the 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 is an instruction to perform some or all of the processes controlled by the processor 202, or to perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. You can store software code that includes Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 206 can be coupled to the processor 202 and can transmit and/or receive wireless signals through one or more antennas 208. Transceiver 206 may include a transmitter and/or receiver. Transceiver 206 may be mixed with an RF unit. In the present disclosure, the wireless device may mean a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 will be described in more detail. Without being limited to this, one or more protocol layers may be implemented by one or more processors 102 and 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 include one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. Can be created. The one or more processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. The one or more processors 102, 202 generate signals (eg, baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, suggestions and/or methods disclosed herein. , To one or more transceivers 106, 206. One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein PDUs, SDUs, messages, control information, data, or information may be obtained according to the fields.

The one or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. The 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. Descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like. The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein are either firmware or software set to perform or are stored in one or more processors 102, 202 or stored in one or more memories 104, 204. It can be driven by the above processors (102, 202). The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and/or instructions.

The one or more memories 104, 204 may be coupled to one or more processors 102, 202, and may store various types of data, signals, messages, information, programs, codes, instructions, and/or instructions. The one or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof. The one or more memories 104, 204 may be located inside and/or outside of the one or more processors 102, 202. Also, the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as a wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like referred to in the methods and/or operational flowcharts of this document to one or more other devices. The one or more transceivers 106, 206 may receive user data, control information, radio signals/channels, and the like referred to in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein from one or more other devices. have. 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 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Additionally, the one or more processors 102, 202 can 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 coupled to one or more antennas 108, 208, and one or more transceivers 106, 206 may be described, functions described herein through one or more antennas 108, 208. , It may be set to transmit and receive user data, control information, radio signals/channels, etc. referred to in procedures, suggestions, methods and/or operation flowcharts. In this document, the 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 and 206 process the received wireless signal/channel and the like in the RF band signal to process the received user data, control information, wireless signal/channel, and the like using one or more processors 102 and 202. It can be converted to a baseband signal. The one or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed using one or more processors 102 and 202 from a baseband signal to an RF band signal. To this end, the one or more transceivers 106, 206 may include (analog) oscillators and/or filters.

Hereinafter, an example of a signal processing circuit to which the present disclosure is applied will be described.

23 illustrates a signal processing circuit for a transmission signal.

Referring to FIG. 23, 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. Without being limited thereto, the operations/functions of FIG. 23 may be performed in the processors 102, 202 and/or transceivers 106, 206 of FIG. The hardware elements of FIG. 23 can be implemented in the processors 102, 202 and/or transceivers 106, 206 of FIG. 22. For example, blocks 1010 to 1060 may be implemented in processors 102 and 202 of FIG. 22. Also, blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 22, and block 1060 may be implemented in the transceivers 106 and 206 of FIG. 22.

The codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 23. Here, the 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). The radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH).

Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010. The scramble sequence used for scramble is generated based on the initialization value, and the initialization value may include ID information of the wireless device. 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 modulated 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 the 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 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 transformation) on complex modulation symbols. Further, the precoder 1040 may perform precoding without performing transform precoding.

The resource mapper 1050 may map modulation symbols of each antenna port to time-frequency resources. The time-frequency resource may include a plurality of symbols (eg, CP-OFDMA symbol, DFT-s-OFDMA symbol) in the time domain, and may include 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 can be transmitted to other devices 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, etc. .

The signal processing process for the received signal in the wireless device may be configured as the inverse of the signal processing processes 1010 to 1060 of FIG. 23. For example, a wireless device (eg, 100 and 200 in FIG. 22) 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 recoverer may include a frequency downlink converter (ADC), 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 de-scramble process. The codeword can be restored to the original information block through decoding. Accordingly, the signal processing circuit (not shown) for the received signal may include a signal restorer, a resource de-mapper, a post coder, a demodulator, a de-scrambler and a decoder.

Hereinafter, an example of using a wireless device to which the present disclosure is applied will be described.

24 shows another example of a wireless device applied to the present disclosure. The wireless device may be implemented in various forms according to use-example/service.

Referring to FIG. 24, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 22, and various elements, components, units/units, and/or modules ). For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 can include one or more processors 102,202 and/or one or more memories 104,204 in FIG. For example, the transceiver(s) 114 can include one or more transceivers 106,206 and/or one or more antennas 108,208 in FIG. 22. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls the overall operation 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 information stored in the memory unit 130 to the outside (eg, another communication device) through the wireless/wired interface through the communication unit 110, or externally (eg, 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 variously configured according to 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 to this, wireless devices include robots (FIGS. 21, 100A), vehicles (FIGS. 21, 100B-1, 100B-2), XR devices (FIGS. 21, 100C), portable devices (FIGS. 21, 100D), and household appliances. (Fig. 21, 100e), IoT device (Fig. 21, 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 (FIGS. 21 and 400), a base station (FIGS. 21 and 200), a network node, and the like. The wireless device may be mobile or may be used in a fixed place depending on use-example/service.

In FIG. 24, various elements, components, units/parts, and/or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least some of them may be connected wirelessly 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 through the communication unit 110. It can be connected wirelessly. Further, each element, component, unit/unit, and/or module in the wireless devices 100 and 200 may further include one or more elements. For example, the controller 120 may be composed of one or more processor sets. For example, the control unit 120 may include a set of communication control processor, application processor, electronic control unit (ECU), graphic processing processor, and 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 (non- volatile memory) and/or combinations thereof.

Hereinafter, the implementation example of FIG. 24 will be described in more detail with reference to the drawings.

Hereinafter, an example of a mobile device to which the present disclosure is applied will be described.

25 illustrates a portable device applied to the present disclosure. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), and a portable computer (eg, a notebook). The mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

Referring to FIG. 25, the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ). The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 in FIG. 24, respectively.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The control unit 120 may perform various operations by controlling the components of the portable device 100. The controller 120 may include an application processor (AP). The memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the portable device 100. Also, the memory unit 130 may store input/output data/information. The power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like. The interface unit 140b may support connection between the mobile device 100 and other external devices. The interface unit 140b may include various ports (eg, audio input/output ports, video input/output ports) for connection with external devices. The input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user. The input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.

For example, in the case of data communication, the input/output unit 140c acquires information/signal (eg, touch, text, voice, image, video) input from a user, and the obtained information/signal is transmitted to the memory unit 130 Can be saved. The communication unit 110 may convert information/signals stored in the memory into wireless signals, and transmit the converted wireless signals directly to other wireless devices or to a base station. In addition, after receiving a radio signal from another wireless device or a base station, the communication unit 110 may restore the received radio signal to original information/signal. After the restored information/signal is stored in the memory unit 130, it can be output in various forms (eg, text, voice, image, video, heptic) through the input/output unit 140c.

Hereinafter, an example of a vehicle to which the present disclosure is applied or an autonomous vehicle will be described.

26 illustrates a vehicle or autonomous vehicle applied to the present disclosure. Vehicles or autonomous vehicles can be implemented as mobile robots, vehicles, trains, aerial vehicles (AVs), ships, and the like.

Referring to FIG. 26, the vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving It may include a portion (140d). The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110/130/140a to 140d correspond to blocks 110/130/140 in FIG. 24, respectively.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, a base station (e.g. base station, road side unit, etc.) and a server. The controller 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100. The controller 120 may include an electronic control unit (ECU). The driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground. The driving unit 140a may include an engine, a motor, a power train, wheels, brakes, and steering devices. The power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100 and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a tilt sensor, a weight sensor, a heading sensor, a position module, and a vehicle forward /Reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illumination sensor, pedal position sensor, and the like. The autonomous driving unit 140d maintains a driving lane, automatically adjusts speed, such as adaptive cruise control, and automatically moves along a predetermined route, and automatically sets a route when a destination is set. Technology, etc. can be implemented.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The controller 120 may control the driving unit 140a such that the vehicle or the autonomous vehicle 100 moves along the autonomous driving path according to a driving plan (eg, speed/direction adjustment). During autonomous driving, the communication unit 110 may acquire the latest traffic information data non-periodically from an external server, and may acquire surrounding traffic information data from nearby vehicles. Also, during autonomous driving, the sensor unit 140c may acquire vehicle status and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on newly acquired data/information. The communication unit 110 may transmit information regarding a vehicle location, an autonomous driving route, and a driving plan to an external server. The external server may predict traffic information data in advance using AI technology or the like based on the information collected from the vehicle or autonomous vehicles, and provide the predicted traffic information data to the vehicle or autonomous vehicles.

Hereinafter, an example of an AI device to which the present disclosure is applied will be described.

27 illustrates an AI device applied to the present disclosure. AI devices can be fixed devices or mobile devices, such as TVs, projectors, smartphones, PCs, laptops, digital broadcasting terminals, tablet PCs, wearable devices, set-top boxes (STBs), radios, washing machines, refrigerators, digital signage, robots, vehicles, etc. It can be implemented as a possible device.

Referring to FIG. 27, the AI device 100 includes a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a/140b, a running processor unit 140c, and a sensor unit 140d It may include. Blocks 110 to 130/140a to 140d correspond to blocks 110 to 130/140 in FIG. 24, respectively.

The communication unit 110 uses wired/wireless communication technology to communicate with external devices such as other AI devices (eg, 21, 100x, 200, 400) or AI servers (eg, 400 of FIG. 21) (eg, sensor information). , User input, learning model, control signals, etc.). To this end, the communication unit 110 may transmit information in the memory unit 130 to an external device or transmit a signal received from the external device to the memory unit 130.

The controller 120 may determine at least one executable action of the AI device 100 based on information determined or generated using a data analysis algorithm or a machine learning algorithm. Then, the control unit 120 may control the components of the AI device 100 to perform the determined operation. For example, the controller 120 may request, search, receive, or utilize data of the learning processor unit 140c or the memory unit 130, and may be determined to be a predicted operation or desirable among at least one executable operation. Components of the AI device 100 may be controlled to perform an operation. In addition, the control unit 120 collects history information including the user's feedback on the operation content or operation of the AI device 100 and stores it in the memory unit 130 or the running processor unit 140c, or the AI server ( 21, 400). The collected history information can be used to update the learning model.

The memory unit 130 may store data supporting various functions of the AI device 100. For example, the memory unit 130 may store data obtained from the input unit 140a, data obtained from the communication unit 110, output data from the running processor unit 140c, and data obtained from the sensing unit 140. In addition, the memory unit 130 may store control information and/or software code necessary for operation/execution of the control unit 120.

The input unit 140a may acquire various types of data from the outside of the AI device 100. For example, the input unit 140a may acquire training data for model training and input data to which the training model is applied. The input unit 140a may include a camera, a microphone, and/or a user input unit. The output unit 140b may generate output related to vision, hearing, or touch. The output unit 140b may include a display unit, a speaker, and/or a haptic module. The sensing unit 140 may obtain at least one of the internal information of the AI device 100, the surrounding environment information of the AI device 100, and user information using various sensors. The sensing unit 140 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, etc. have.

The learning processor unit 140c may train a model composed of artificial neural networks using the training data. The learning processor unit 140c may perform AI processing together with the learning processor unit of the AI server (FIGS. 21 and 400 ). The learning processor unit 140c may process information received from an external device through the communication unit 110 and/or information stored in the memory unit 130. Also, the output value of the running processor unit 140c may be transmitted to an external device through the communication unit 110 and/or stored in the memory unit 130.

Claims (18)

A method for setting a link direction performed by a communication node in a wireless communication system, Receiving first resource setting information generated by a donor node, and The second resource configuration information is transmitted to a child node of the communication node, The first resource setting information informs the link direction and availability of the first resource of the communication node to the link between the child node and the communication node, The second resource configuration information is a method characterized in that to inform the child node of the link direction of the second resource set as a flexible (flexible) resource to the child node for the link. According to claim 1, The method of claim 1, wherein the first resource setting information is transmitted through system information or a radio resource control (RRC) message. According to claim 1, The method of claim 2, wherein the second resource configuration information is transmitted through downlink control information (DCI). According to claim 1, Each of the first resource and the second resource is a slot (slot) unit characterized in that the resource. According to claim 1, Each of the communication node and the child node is an integrated access and backhaul (IAB) node including a base station and a terminal. According to claim 1, The method of claim 1, wherein the first resource and the second resource are resources allocated to the same time interval. The method of claim 6, A method according to claim 1, wherein the link direction of the second resource is downlink or flexible based on the first resource is configured as downlink and based on the second resource configuration information. The method of claim 6, A method according to claim 1, wherein the link direction of the second resource is uplink or flexible based on the second resource configuration information, based on the first resource being configured as uplink. The method of claim 6, A method according to claim 1, wherein the link direction of the second resource is uplink, downlink, or flexible based on the second resource configuration information, based on the first resource being set to flexible. The method of claim 6, The first resource is set to unavailable, based on the second resource configuration information, the link direction of the second resource is characterized in that the uplink, downlink or flexible. According to claim 1, The method of claim 1, wherein the first resource configuration information is the same as slot format information (SFI) transmitted to the child node. According to claim 1, The method of claim 1, wherein the first resource setting information is independent of slot format information transmitted to the child node. According to claim 1, The method of claim 1, wherein the availability of the first resource is always available, unavailable, and configured to be controlled by a parent node of the communication node. The communication node, One or more memories storing instructions; One or more transceivers; And And one or more processors connecting the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions, Receiving first resource setting information generated by a donor node, and The second resource configuration information is transmitted to a child node of the communication node, The first resource setting information informs the link direction and availability of the first resource of the communication node to the link between the child node and the communication node, And the second resource setting information informs the child node of the link direction of the second resource set as a flexible resource to the child node for the link. The method of claim 14, The communication node is a method characterized in that the integrated access and backhaul (IAB) node including a base station and a terminal. The method of claim 14, And the communication node communicates with at least one of a mobile terminal, a network, and an autonomous vehicle other than the communication node. A computer readable medium comprising at least one instruction that is based on being executed by at least one processor, the computer readable medium comprising: Receiving first resource setting information generated by a donor node, and Performing an operation comprising the step of transmitting the second resource configuration information to the child node (child node) of the communication node, The first resource setting information informs the link direction and availability of the first resource of the communication node to the link between the child node and the communication node, And the second resource setting information informs the child node of the link direction of the second resource set as a flexible resource to the child node for the link. In an apparatus (apparatus) set to control a communication node, the apparatus, One or more processors; And And one or more memories operatively coupled by the one or more processors, and storing instructions, wherein the one or more processors execute the instructions, Receiving first resource setting information generated by a donor node, and The second resource configuration information is transmitted to a child node of the communication node, The first resource setting information informs the link direction and availability of the first resource of the communication node to the link between the child node and the communication node, And the second resource setting information informs the child node of the link direction of the second resource set as a flexible resource to the child node for the link.

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