WO2020067844A1 - Method for terminal to receive data from base station in wireless communication system, and device for same - Google Patents

Abstract

Provided is a method for a terminal to receive data from a base station in a wireless communication system supporting coordinated multiple point (CoMP). Specifically, the method is characterized in that: a resource allocation scheme for a terminal and size information about a resource block group determined on the basis of the size of a bandwidth part are received from a base station; downlink control information (DCI), including whether resource allocations to a first transmission and reception point (TRP) and a second TRP overlap, is received from the base station through the first TRP; and data from the first TRP and the second TRP are received on the basis of the DCI and the size information about the resource block group, wherein a first size of the resource block group is recognized as a second size that is double the first size, a first resource block group of the second size for the first TRP is recognized through a first bit group in a field of the DCI, and a second resource group of the second size for the second TRP is recognized through a second bit group in a field of the DCI.

Description

Method for receiving data from base station in wireless communication system and apparatus therefor

The present specification relates to a wireless communication system, and particularly to a method for a terminal to receive data from a base station in a multi-point cooperative transmission situation and an apparatus supporting the same.

Mobile communication systems have been developed to provide voice services while ensuring user mobility. However, the mobile communication system has expanded not only to the voice but also to the data service, and now, due to the explosive increase in traffic, a shortage of resources is caused and users demand a higher speed service, so a more advanced mobile communication system is required. Mobile communication systems have been developed to provide voice services while ensuring user mobility. However, the mobile communication system has expanded not only to voice but also to data services, and now, due to the explosive increase in traffic, a shortage of resources is caused and users demand higher speed services, so a more advanced mobile communication system is required. .

The requirements of the next-generation mobile communication system are to support the explosive data traffic, the dramatic increase in the transmission rate per user, the largely increased number of connected devices, the very low end-to-end latency, and high energy efficiency. It should be possible. To this end, dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), and super-wideband Various technologies such as wideband support and device networking have been studied.

It is an object of the present disclosure to provide a method for a terminal to receive data and an apparatus therefor in a multi-point cooperative transmission situation in a wireless communication system.

The technical problems to be achieved in the present specification are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary knowledge in the technical field to which this specification belongs from the following description. Will be able to.

In a method of receiving data from a base station in a wireless communication system supporting Coordinated Multiple Point (CoMP) according to the present specification,

Receiving size information of a resource block group determined based on a size of a bandwidth part from the base station and a resource allocation method for the terminal;

Receiving downlink control information (DCI) including whether or not the resource allocation for the first transmission point and the second transmission point (Transmission Reception Point, TRP) from the base station is received through the first transmission and reception point step;

Including the size of the resource block group and the downlink control information, receiving data from the first transmission / reception point and the second transmission / reception point;

The step of receiving the data,

Recognizing the first size of the resource block group as a second size that is twice,

Recognizing a first resource block group of a second size for the first transmission / reception point through a first bit group in the field of the downlink control information, and

And recognizing a second resource block group of a second size for the second transmission / reception point through a second bit group in the field of the downlink control information.

In addition, in this specification, the most significant bit in the field of the downlink control information may be characterized in that it indicates whether the resource allocation is overlapped.

In addition, in the present specification, the most significant bit in the field of the downlink control information is one of whether the resource allocation for each of the first transmission / reception point and the second transmission / reception point is totally overlapped, partially overlapped, or non-overlapping. It can be characterized by showing.

In addition, in the present specification, the first resource block group and the second resource block group are assigned to a first Code Division Multiplexing (CDM) group set at the first transmission / reception point and a second CDM group set at the second transmission / reception point. It may be characterized by being sequentially mapped.

In addition, in the present specification, the first CDM group and the second CDM group may be characterized by being a De-Modulation Reference Signal (DMRS) port group having a QCL (Quasi co-located) relationship with each other.

이고, 여기서,

는 제1 비트 그룹 또는 제2 비트 그룹의 크기를 나타내며,

는 i번째 대역폭 파트의 크기를 의미하며,

는 i번째 대역폭 파트의 시작 번호를 의미할 수 있다. In addition, in the present specification, when the first size of the resource block group is odd, the size of the first bit group or the second bit group may be determined by using Equation 1 below. , [Mathematics 1]

And here,

Denotes the size of the first bit group or the second bit group,

Is the size of the i-th bandwidth part,

Can mean the starting number of the i-th bandwidth part.

In addition, in the present specification, the resource allocation method may be characterized in that it is a type 0 resource allocation method, which is a method in which the resource block group to be allocated to the terminal in the bandwidth part is indicated in a field of the downlink control information.

In addition, in the present specification, the number of bits defined for frequency resource allocation in the downlink control information field may be defined as a maximum number of bits when the resource allocation method is the type 0.

In addition, in the present specification, when the number of bits corresponding to the first size of the resource block group is the third size, the number of bits corresponding to the second size is 1/2 of the third size It can be characterized by being.

In addition, in the present specification, when the number of bits corresponding to the second size is odd, two resource block groups through the most significant bit of the bit group in which the number of bits is allocated among the first bit group and the second bit group It may be characterized by recognizing.

According to the present specification, there is an effect of performing independent resource allocation for a plurality of TRP paths in a multi-point cooperative transmission situation using the DCI format defined in the current 3GPP 5G NR standard.

The effects obtained in the present specification are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. .

Included as part of the detailed description to aid understanding of the present specification, the accompanying drawings provide embodiments of the present specification and describe the technical features of the present specification together with the detailed description.

1 is a view showing an example of the overall system structure of the NR to which the method proposed in this specification can be applied.

2 shows a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in this specification can be applied.

3 shows an example of a resource grid supported by a wireless communication system to which the method proposed in this specification can be applied.

4 shows examples of an antenna port and a resource grid for each neurology to which the method proposed in this specification can be applied.

5 is a diagram illustrating an SSB structure to which the present invention can be applied.

6 shows an example of a block diagram of a transmitter composed of an analog beamformer and an RF chain.

7 shows an example of a block diagram of a transmitting end composed of a digital beamformer and an RF chain.

8 shows an example of an analog beam scanning method.

9 is a view comparing a beam scanning application method.

10 is a diagram showing an RACH procedure.

11 shows an example of the overall RACH procedure.

12 is a diagram showing an example of a TA.

13 shows an example of retransmission of MSG3 and MSG4 transmission.

14 shows a concept of a threshold value of an SS block for RACH resource association.

15 is a diagram showing an example of a change in the power ramping count in the RACH procedure.

16 shows an example in which the same frequency resource is allocated to different transmission / reception points through a single DCI signaling.

17 shows an example of allocating frequency resources independently / individually to different transmission / reception points through a single DCI signaling.

18 is a graph showing the number of bits required according to the bandwidth part size.

19 shows an example of the DCI format indicated to the UE when the number of bits is even.

20 shows an example of a bit insufficient when the above proposal is applied in a section in which the size of the bandwidth part is 1-36.

21 shows a DCI field indicated to the UE when the number of bits is odd.

22 is a graph showing the size of a resource block group defined according to the third embodiment and the method of Table 20 based on the bandwidth part size.

23 shows an example of a method in which a base station allocates frequency resources to a terminal based on the proposal of the present invention.

24 shows an example in which a terminal allocates resources based on data received from a base station based on the proposal of the present invention.

25 shows an example of a method for a base station to allocate frequency resources in an initial access process based on the proposal of the present invention.

26 shows an example in which a terminal allocates resources in an initial access process based on the proposal of the present specification.

27 is a flowchart illustrating a method for receiving data by a terminal according to an embodiment of the present specification.

28 is a flowchart illustrating a data transmission method of a base station according to an embodiment of the present specification.

29 illustrates a communication system applied to the present invention.

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

31 shows another example of a wireless device applied to the present invention.

32 illustrates a mobile device applied to the present invention.

33 illustrates an AI device applied to the present invention.

34 illustrates an AI server applied to the present invention.

Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, but the same or similar reference numerals are assigned to the same or similar elements, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for the components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves. In addition, in describing the embodiments disclosed in the present specification, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

In this specification, a base station has a meaning as a terminal node of a network that directly communicates with a terminal. Certain operations described in this document as being performed by a base station may be performed by an upper node of the base station in some cases. That is, it is apparent that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station can be performed by a base station or other network nodes other than the base station. 'Base station (BS)' is a term such as a fixed station (fixed station), Node B, evolved-NodeB (eNB), base transceiver system (BTS), access point (AP), general NB (gNB), etc. Can be replaced by In addition, the 'terminal (Terminal)' may be fixed or mobile, UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS ( It can be replaced with terms such as Advanced Mobile Station (WT), Wireless terminal (WT), Machine-Type Communication (MTC) device, Machine-to-Machine (M2M) device, and Device-to-Device (D2D) device.

Hereinafter, downlink (DL) means communication from a base station to a terminal, and uplink (UL) means communication from a terminal to a base station. In the downlink, the transmitter may be part of the base station, and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal, and the receiver may be part of the base station.

Certain terms used in the following description are provided to help understanding of the present invention, and the use of these specific terms may be changed to other forms without departing from the technical spirit of the present invention.

The following technologies are code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and NOMA. (non-orthogonal multiple access), and the like. CDMA may be implemented by radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with radio technologies such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented with wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA). UTRA is part of a universal mobile telecommunications system (UMTS). The 3rd generation partnership project (3GPP) long term evolution (LTE) is part of evolved UMTS (E-UMTS) using E-UTRA, and adopts OFDMA in the downlink and SC-FDMA in the uplink. LTE-A (advanced) is an evolution of 3GPP LTE.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802, 3GPP and 3GPP2. That is, steps or parts that are not described in order to clearly reveal the technical idea of the present invention among the embodiments of the present invention may be supported by the documents. Also, all terms disclosed in this document may be described by the standard document.

For clarity, 3GPP LTE / LTE-A / NR (New Radio) is mainly described, but the technical features of the present invention are not limited thereto.

The three main requirements areas of 5G are: (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Super-reliability and Ultra-reliable and Low Latency Communications (URLLC) domain.

Some use cases may require multiple areas for optimization, and other use cases may focus on only one key performance indicator (KPI). 5G is a flexible and reliable way to support these various use cases.

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, it is expected that voice will be processed as an application program simply using the data connection provided by the communication system. The main causes for 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. And, cloud storage is a special use case that drives the growth of uplink data transfer rate. 5G is also used for remote work in the cloud, requiring much lower end-to-end delay to maintain a good user experience when a tactile interface is used. Entertainment For example, cloud gaming and video streaming are another key factor in increasing demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including 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.

In addition, one of the most anticipated 5G use cases is the ability to seamlessly connect embedded sensors in all fields, namely mMTC. It is predicted that by 2020, there will be 20.4 billion potential IoT devices. 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 includes new services that will transform the industry through ultra-reliable / low-latency links, such as remote control of the main infrastructure and self-driving vehicles. Reliability and level of delay are essential for smart grid control, industrial automation, robotics, drone control and coordination.

Next, a number of use cases 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. This fast speed is required to deliver TV in 4K (6K, 8K and higher) resolutions as well as virtual and augmented reality. Virtual Reality (VR) and Augmented Reality (AR) applications include almost immersive sports events. Certain application programs 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, along with many use cases for mobile communications to vehicles. For example, entertainment for passengers requires simultaneous high capacity and high mobility mobile broadband. This is because future users continue to expect high-quality connections regardless of their location and speed. Another example of application in the automotive field is the augmented reality dashboard. It identifies objects in the dark over what the driver sees through the front window, and superimposes and displays information telling 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 to reduce the risk of accidents by guiding alternative courses of action to make driving safer. The next step will be remote control or a self-driven vehicle. This requires very reliable and very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, self-driving vehicles will perform all driving activities, and drivers will focus only on traffic beyond which the vehicle itself cannot identify. The technical requirements of self-driving vehicles require ultra-low delays and ultra-high-speed reliability to increase traffic safety to levels beyond human reach.

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 the 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 are typically 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 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 can help reduce barriers to distance and 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 cables with wireless links 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 freight tracking are important use cases for mobile communications that enable the tracking of inventory and packages from anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates, but require wide range and reliable location information.

The present invention, which will be described later in this specification, may be implemented by combining or changing each embodiment to satisfy the above-described requirements of 5G.

Term Definition

eLTE eNB: The eLTE eNB is an evolution of the eNB that supports connectivity to EPC and NGC.

gNB: A node that supports NR as well as a connection with NGC.

New RAN: A radio access network that supports NR or E-UTRA or interacts with NGC.

Network slice: A network slice is a network defined by the operator to provide an optimized solution for specific market scenarios that require specific requirements along with end-to-end coverage.

Network function: A network function is a logical node within a network infrastructure with well-defined external interfaces and well-defined functional behavior.

NG-C: Control plane interface used for the NG2 reference point between the new RAN and NGC.

NG-U: User plane interface used for NG3 reference point between new RAN and NGC.

Non-standalone NR: Deployment configuration where gNB requires LTE eNB as an anchor for control plane connection to EPC or eLTE eNB as an anchor for control plane connection to NGC.

Non-standalone E-UTRA: Deployment configuration where eLTE eNB requires gNB as an anchor for control plane connection to NGC.

User plane gateway: The endpoint of the NG-U interface.

System general

1 is a view showing an example of the overall system structure of the NR to which the method proposed in this specification can be applied.

Referring to FIG. 1, NG-RAN consists of NG-RA user planes (new AS sublayer / PDCP / RLC / MAC / PHY) and gNBs that provide control plane (RRC) protocol termination for UE (User Equipment). do.

The gNBs are interconnected through an Xn interface.

The gNB is also connected to the NGC through the NG interface.

More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and a User Plane Function (UPF) through an N3 interface.

NR (New Rat) Numerology and Frame Structure

)으로 스케일링(scaling) 함으로써 유도될 수 있다. 또한, 매우 높은 반송파 주파수에서 매우 낮은 서브캐리어 간격을 이용하지 않는다고 가정될지라도, 이용되는 뉴머롤로지는 주파수 대역과 독립적으로 선택될 수 있다.In the NR system, multiple numerologies may be supported. Here, the numerology may be defined by subcarrier spacing and CP (Cyclic Prefix) overhead. At this time, a plurality of subcarrier intervals is the default subcarrier interval N (or,

) Can be derived by scaling. Further, even if it is assumed that a very low subcarrier spacing is not used at a very high carrier frequency, the numerology used can be selected independently of the frequency band.

In addition, in the NR system, various frame structures according to a number of pneumatics may be supported.

Hereinafter, an orthogonal frequency division multiplexing (OFDM) numerology and a frame structure that can be considered in an NR system will be described.

Multiple OFDM neurology supported in the NR system may be defined as shown in Table 1.

의 시간 단위의 배수로 표현된다. 여기에서,

이고,

이다. 하향링크(downlink) 및 상향링크(uplink) 전송은

의 구간을 가지는 무선 프레임(radio frame)으로 구성된다. 여기에서, 무선 프레임은 각각

의 구간을 가지는 10 개의 서브프레임(subframe)들로 구성된다. 이 경우, 상향링크에 대한 한 세트의 프레임들 및 하향링크에 대한 한 세트의 프레임들이 존재할 수 있다.도 2는 본 명세서에서 제안하는 방법이 적용될 수 있는 무선 통신 시스템에서 상향링크 프레임과 하향링크 프레임 간의 관계를 나타낸다.With respect to the frame structure in the NR system, the size of various fields in the time domain is

It is expressed as a multiple of the unit of time. From here,

ego,

to be. Downlink (downlink) and uplink (uplink) transmission is

It consists of a radio frame (radio frame) having a section of. Here, each radio frame is

It consists of 10 subframes (subframes) having an interval of. In this case, there may be one set of frames for uplink and one set of frames for downlink. FIG. 2 shows an uplink frame and a downlink frame in a wireless communication system to which a method proposed in the present specification can be applied. It shows the relationship between.

이전에 시작해야 한다.As shown in FIG. 2, transmission of an uplink frame number i from a user equipment (UE) is greater than the start of a corresponding downlink frame at the corresponding terminal.

You have to start earlier.

에 대하여, 슬롯(slot)들은 서브프레임 내에서

의 증가하는 순서로 번호가 매겨지고, 무선 프레임 내에서

의 증가하는 순서로 번호가 매겨진다. 하나의 슬롯은

의 연속하는 OFDM 심볼들로 구성되고,

는, 이용되는 뉴머롤로지 및 슬롯 설정(slot configuration)에 따라 결정된다. 서브프레임에서 슬롯

의 시작은 동일 서브프레임에서 OFDM 심볼

의 시작과 시간적으로 정렬된다.New Merology

For, slots are within a subframe

Numbered in increasing order, within the radio frame

It is numbered in increasing order. One slot

Consisting of consecutive OFDM symbols of,

Is determined according to the numerology and slot configuration used. Slot in subframe

Start of OFDM symbol in the same subframe

It is aligned with the start of time.

Not all terminals can transmit and receive at the same time, which means that not all OFDM symbols in a downlink slot or an uplink slot cannot be used.

에서의 일반(normal) CP에 대한 슬롯 당 OFDM 심볼의 수를 나타내고, 표 3은 뉴머롤로지

에서의 확장(extended) CP에 대한 슬롯 당 OFDM 심볼의 수를 나타낸다.Table 2 is pneumatic

Table 3 shows the number of OFDM symbols per slot for a normal CP in Table 3.

Represents the number of OFDM symbols per slot for an extended CP in.

), 무선 프레임 별 슬롯의 개수(

), 서브프레임 별 슬롯의 개수(

)를 나타내며, 표 3은 확장(extended) CP에서 슬롯 별 OFDM 심볼의 개수, 무선 프레임 별 슬롯의 개수, 서브프레임 별 슬롯의 개수를 나타낸다.Table 2 shows the number of OFDM symbols per slot in a normal CP (

), The number of slots per radio frame (

), Number of slots per subframe (

Table 3 shows the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.

NR  Physical resource ( NR  Physical Resource)

With respect to physical resources in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. Can be considered.

Hereinafter, the physical resources that can be considered in the NR system will be described in detail.

First, with respect to the antenna port, the antenna port is defined such that the channel on which the symbol on the antenna port is carried can be deduced from the channel on which the other symbol on the same antenna port is carried. If the large-scale property of a channel carrying a symbol on one antenna port can be inferred from a channel carrying a symbol on another antenna port, the two antenna ports are QC / QCL (quasi co-located or quasi co-location). Here, the wide range of characteristics includes one or more of delay spread, doppler spread, frequency shift, average received power, and received timing.

3 shows an example of a resource grid supported by a wireless communication system to which the method proposed in this specification can be applied.

서브캐리어들로 구성되고, 하나의 서브프레임이 14·2μOFDM 심볼들로 구성되는 것을 예시적으로 기술하나, 이에 한정되는 것은 아니다.Referring to Figure 3, the resource grid is on the frequency domain

It is configured by subcarriers, one subframe is composed of 14 · 2μOFDM symbols as an example, but is not limited thereto.

서브캐리어들로 구성되는 하나 또는 그 이상의 자원 그리드들 및

의 OFDM 심볼들에 의해 설명된다. 여기에서,

이다. 상기

는 최대 전송 대역폭을 나타내고, 이는, 뉴머롤로지들뿐만 아니라 상향링크와 하향링크 간에도 달라질 수 있다.In the NR system, the transmitted signal is

One or more resource grids consisting of subcarriers and

It is described by the OFDM symbols of. From here,

to be. remind

Denotes a maximum transmission bandwidth, which may vary between uplink and downlink as well as numerology.

및 안테나 포트 p 별로 하나의 자원 그리드가 설정될 수 있다.In this case, as shown in Fig. 4, the numerology

And one resource grid for each antenna port p.

4 shows examples of an antenna port and a resource grid for each neurology to which the method proposed in this specification can be applied.

및 안테나 포트 p에 대한 자원 그리드의 각 요소는 자원 요소(resource element)로 지칭되며, 인덱스 쌍

에 의해 고유적으로 식별된다. 여기에서,

는 주파수 영역 상의 인덱스이고,

는 서브프레임 내에서 심볼의 위치를 지칭한다. 슬롯에서 자원 요소를 지칭할 때에는, 인덱스 쌍

이 이용된다. 여기에서,

이다.New Merology

And each element of the resource grid for the antenna port p is referred to as a resource element, an index pair

It is uniquely identified by. From here,

Is an index on the frequency domain,

Indicates the position of the symbol in the subframe. When referring to a resource element in a slot, an index pair

Is used. From here,

to be.

및 안테나 포트 p에 대한 자원 요소

는 복소 값(complex value)

에 해당한다. 혼동(confusion)될 위험이 없는 경우 혹은 특정 안테나 포트 또는 뉴머롤로지가 특정되지 않은 경우에는, 인덱스들 p 및

는 드롭(drop)될 수 있으며, 그 결과 복소 값은

또는

이 될 수 있다.New Merology

And resource elements for antenna port p

Is the complex value

Corresponds to If there is no risk of confusion, or if a specific antenna port or numerology is not specified, the indexes p and

Can be dropped, resulting in a complex value

or

Can be

연속적인 서브캐리어들로 정의된다. In addition, a physical resource block (physical resource block) on the frequency domain

It is defined as consecutive subcarriers.

Point A serves as a common reference point of the resource block grid and can be obtained as follows.

-OffsetToPointA for PCell downlink indicates the frequency offset between the lowest sub-carrier and point A of the lowest resource block overlapping the SS / PBCH block used by the UE for initial cell selection, 15 kHz subcarrier spacing for FR1 and Expressed in resource block units assuming a 60 kHz subcarrier spacing for FR2;

-absoluteFrequencyPointA represents the frequency-position of point A expressed as in an absolute radio-frequency channel number (ARFCN).

에 대한 주파수 영역에서 0부터 위쪽으로 넘버링(numbering)된다.Common resource blocks set the subcarrier interval

It is numbered upward from 0 in the frequency domain for.

에 대한 공통 자원 블록 0의 subcarrier 0의 중심은 'point A'와 일치한다. 주파수 영역에서 공통 자원 블록 번호(number)

와 서브캐리어 간격 설정

에 대한 자원 요소 (k,l)은 아래 수학식 1과 같이 주어질 수 있다.Subcarrier spacing setting

The center of subcarrier 0 of the common resource block 0 for 'point A' coincides with 'point A'. Common resource block number in frequency domain

And subcarrier spacing settings

The resource element for (k, l) can be given as in Equation 1 below.

는

이 point A를 중심으로 하는 subcarrier에 해당하도록 point A에 상대적으로 정의될 수 있다. 물리 자원 블록들은 대역폭 파트(bandwidth part, BWP) 내에서 0부터

까지 번호가 매겨지고,

는 BWP의 번호이다. BWP i에서 물리 자원 블록

와 공통 자원 블록

간의 관계는 아래 수학식 2에 의해 주어질 수 있다.From here,

The

It can be defined relative to point A to correspond to a subcarrier centered on point A. Physical resource blocks start from 0 within a bandwidth part (BWP).

Numbered up to,

Is the number of the BWP. Physical resource block in BWP i

And common resource blocks

The relationship between can be given by Equation 2 below.

는 BWP가 공통 자원 블록 0에 상대적으로 시작하는 공통 자원 블록일 수 있다. From here,

May be a common resource block in which the BWP starts relative to the common resource block 0.

Uplink control channel

Physical uplink control signaling should be capable of carrying at least hybrid-ARQ acknowledgment, CSI report (including beamforming information if possible), and scheduling request.

At least two transmission methods are supported for an UL control channel supported by the NR system.

The uplink control channel may be transmitted in a short duration around the last transmitted uplink symbol (s) of the slot. In this case, the uplink control channel is time-division-multiplexed and / or frequency-division-multiplexed with the UL data channel in the slot. For a short-term uplink control channel, 1 symbol unit transmission of a slot is supported.

-Short Uplink Control Information (UCI) and data are frequency-divided between UEs and UEs when physical resource blocks (PRBs) for at least short UCI and data do not overlap. -It is multiplexed.

-In order to support time division multiplexing (TDM) of short PUCCH (short PUCCH) from different terminals in the same slot, whether the symbol (s) in the slot to transmit the short PUCCH is supported at least 6 GHz or more. Mechanism to inform the terminal is supported.

-At least 1 for a 1-symbol duration) When a reference signal (RS) is multiplexed, UCI and RS are multiplexed to a given OFDM symbol by frequency division multiplexing (FDM); and 2) The same subcarrier spacing between downlink (DL) / uplink (UL) data and short-term PUCCH is supported in the same slot.

-At least, short-term PUCCH over a 2-symbol duration of a slot is supported. At this time, the subcarrier interval between the downlink (DL) / uplink (UL) data and the short-term PUCCH in the same slot is the same.

At least, a PUCCH resource of a given UE in a slot, that is, short PUCCHs of different UEs, is supported in a semi-static configuration in which time division multiplexing can be performed within a given duration in a slot.

-The PUCCH resource includes a time domain, a frequency domain, and a code domain when applicable.

-Short-term PUCCH can be extended to the end of the slot from the perspective of the terminal. At this time, after the short-term PUCCH, an explicit gap symbol is unnecessary.

-For a slot having a short UL part (ie, a DL-centric slot), when data is scheduled in a short UL part, 'short UCI' and data are one. It can be multiplexed by frequency division by the terminal of the.

The uplink control channel may be transmitted in a long-duration over a plurality of uplink symbols to improve coverage. In this case, the uplink control channel is frequency-division multiplexed with the uplink data channel in the slot.

-UCI carried by a long duration UL control channel (PACI) with a low PAPR (Peak to Average Power Ratio) design may be transmitted in one slot or multiple slots.

-Transmission using multiple slots is allowed for a total duration (eg, 1 ms) in at least some cases.

-For a long time uplink control channel, time division multiplexing (TDM) between RS and UCI is supported for DFT-S-OFDM.

-The long UL part of the slot may be used for long PUCCH transmission. That is, a long PUCCH is supported for both an uplink-only slot and a slot having a variable number of symbols composed of at least 4 symbols.

-For at least 1 or 2 bit UCI, the UCI may be repeated in N slots (N> 1), and the N slots may or may not be contiguous in slots in which a long PUCCH is allowed. .

-Simultaneous transmission of PUSCH and PUCCH is supported for at least long PUCCH. That is, even when data exists, uplink control for the PUCCH resource is transmitted. In addition, UCI in PUSCH is supported in addition to simultaneous PUCCH-PUSCH transmission.

*-Intra-TTI slot frequency hopping within TTI is supported.

-DFT-s-OFDM waveform is supported.

-Transmit antenna diversity is supported.

TDM and FDM between short-term PUCCH and long-term PUCCH are supported for other terminals in at least one slot. In the frequency domain, PRB (or multiple PRBs) is a minimum resource unit size for an uplink control channel. When hopping is used, frequency resources and hopping may not be spread with carrier bandwidth. In addition, the terminal specific RS is used for NR-PUCCH transmission. The set of PUCCH resources is set by higher layer signaling, and PUCCH resources in the set are indicated by downlink control information (DCI).

As part of the DCI, the timing between data reception and hybrid-ARQ acknowledgment transmission should be able to be indicated dynamically (at least with RRC). The combination of semi-static configuration and dynamic signaling (at least for some types of UCI information) is used to determine PUCCH resources for 'long and short PUCCH format'. Here, the PUCCH resource includes a time domain, a frequency domain, and a code domain if applicable. The use of UCI on PUSCH, i.e., some of the scheduled resources for UCI, is supported in case of simultaneous transmission of UCI and data.

In addition, at least uplink transmission of a single HARQ-ACK bit is supported. In addition, a mechanism for enabling frequency diversity is supported. In addition, in the case of URLLC (Ultra-Reliable and Low-Latency Communication), a time interval between scheduling request (SR) resources set for the terminal may be smaller than one slot.

Downlink shared channel (Physical downlink  shared channel: PUSCH )

Up to two codewords q∈ {0,1} can be transmitted, and in the case of a single codeword transmission, the value of q is 0.

를 가정하고, 여기서

는 물리채널 상에서 전송되는 코드워드 q의 비트 수이다. 비트들의 블록은 변조(modulation) 전에 스크램블 되고, 아래 수학식 3에 따라 스크램블된 비트 블록

이 생성된다.For each codeword, the terminal blocks the bits

Suppose, here

Is the number of bits of codeword q transmitted on the physical channel. The block of bits is scrambled before modulation, and the scrambled bit block according to Equation 3 below

This is created.

In Equation 3, c ^(q) (i) is a scrambling sequence, and the scrambling sequence generator is initialized by Equation 4 below.

In Equation 4, n _ID ∈ {0,1, ..., 1023} is the same when the upper layer parameter dataScramblingIdentityPDSCH is set, and RNTI is the same as C-RNTI or CS-RNTI, and transmission is a common search interval It is not scheduled using DCI format 1_0 in (common search space).

이다.If not,

to be.

And, n _RNTI corresponds to the RNTI associated with PDSCH transmission.

Modulation

이 아래 표 4의 변조 방법들 중 하나를 이용하여 변조된다고 가정한다.For codeword q, the terminal is scrambled bit block

It is assumed that the modulation is performed using one of the modulation methods in Table 4 below.

와 같을 수 있다.At this time, the block of symbols modulated with the complex value

It can be like

Layer Mapping

The terminal assumes that the complex value modulation symbol for each codeword to be transmitted can be mapped to one or several layers according to Table 5 below.

에 대해서,

는 아래 수학식 5에 따라 안테나 포드들에 매핑된다.Vector block

about,

Is mapped to antenna pods according to Equation 5 below.

이고,

이다. 안테나 포트들의 셋은

이다.In Equation 5

ego,

to be. Three of the antenna ports

to be.

email resource  On the block Mapping (Mapping to virtual resource blocks)

이 하향링크 전력 할당을 따르고, 아래의 조건들을 따르는 전송을 위해 할당된 가상 자원 블록에서 y ^(p)(0)에서 시작하여 자원 요소 (k', l) _p,u 에 순차적으로 매핑된다.The terminal has complex value symbols for each of the antenna pods used for the transmission of the physical channel.

In the virtual resource block allocated for transmission following the downlink power allocation and following conditions, starting from y ^(p) (0) and sequentially mapped to resource elements (k ', l) _{p, u} .

-Exists in a virtual resource block allocated for transmission.

-Declared as available for PDSCH.

-The resource element corresponding to the physical resource blocks

-Not used for transmission of related DM-RS or DM-RS for other co-scheduled terminals.

-Not used for non-zero power CSI-RS except for non-zero power CSI-RS configured with upper layer parameter CSI-RS-Resource-Mobility in MeasObjectNR IE.

-Not used for PT-RS.

-Not declared as unavailable to PDSCH.

Any common resource block that partially or completely overlaps the SS / PBCH block is considered occupied, and is not used for the transmission of the PDSCH in the OFDM symbol in which the SS / PBCH block is transmitted.

The mapping for resource elements (k ', l) _{p, u} allocated to PDSCH and not pre-empted for other purposes is first increased in the order of index k' for the allocated virtual resource block, where k '= 0 Is the lowest index virtual resource block allocated for transmission and the first subcarrier at index l.

email In resources  physical resource  In blocks Mapping (Mapping from virtual to physical resource blocks)

The UE should assume that the virtual resource block is mapped to the physical resource block according to the indicated mapping scheme, non-interleaved or interleaved mapping. If the mapping scheme is not indicated, the UE should assume a non-interleaved mapping.

으로 매핑되는 경우, 공통 탐색 구간에서 DCI 포맷 1_0으로 스케줄링되는 PDSCH 전송을 제외하고 가상 자원 블록 n은 물리자원 블록 n에 매핑된다.For non-interleaved VRB-toPRB mapping, virtual resource block n is physical resource block

When mapped to, virtual resource block n is mapped to physical resource block n except for PDSCH transmission scheduled in DCI format 1_0 in the common discovery period.

은 DCI가 수신되는 제어 자원 셋에서 가장 낮은 숫자의 물리자원 블록이다.At this time,

Is the lowest numbered physical resource block in the set of control resources for which DCI is received.

For interleaved VRB-to-PRB mapping, the mapping process is defined as a resource block bundle.

에 대한 대역 폭 부분(bandwidth part: BWP) i에서 자원 블록

의 셋은 자원 블록 넘버 및 번들 넘버가 증가하는 순서로

자원 블록 번들들로 분할된다. L _i은 상위 계층 파라미터 vrb-ToPRB-Interleaver 에 의해서 제공되는 대역폭 부분 i에 대한 번들 크기이고,-Starting position

Resource block in bandwidth part (BWP) i for

The set of is in the order of increasing resource block number and bundle number.

It is divided into resource block bundles. L _i is the bundle size for the bandwidth part i provided by the upper layer parameter vrb-ToPRB-Interleaver,

자원 블록들로 구성된다.-Resource block bundle 0

It consists of resource blocks.

이거나, L _i가 그렇지 않으면, 자원 블록 번들 L _bundle은

로 구성된다.-

Or, if L _i is not, the resource block bundle L _bundle is

It consists of.

-All other resource block bundles are composed of L _i resource blocks.

인 가상 자원 블록들은 아래에 따라 물리자원 블록으로 매핑된다.-Spacing

The virtual resource blocks are mapped to physical resource blocks according to the following.

-The virtual resource block bundle N _bundle -1 is mapped to the physical resource block bundle N _bundle -1.

은 물리자원 블록 번들 f(j)에 매핑되고, 이때 각 파라미터 값은 아래 수학식 6과 같다.-Virtual resource block bundle

Is mapped to the physical resource block bundle f (j), where each parameter value is expressed by Equation 6 below.

If the PRB size is 4, the UE does not assume L _i = 2, and if any bundle size is not set, it is assumed that L _i = 2.

The UE can assume that the same precoding in the frequency domain is used in the PRB bundle. However, the UE should not assume that the same precoding is used for different common resource block bundles.

DCI  Format 1_1

DCI format 1_1 may be used for scheduling of PDSCH in one cell.

The following information may be transmitted through DCI format 1_1 for CRC scrambled by a new RNTI, CS-RNTI or C-RNTI.

-Identifier for DCI format: 1 bits

-The value of this bit field is always set to 1 to indicate DL DCI format.

-Carrier indicator: 0 or 3 bits

-Bandwidth part indicator: 0, 1 or 2 bits determined by the number of DL BWP n _{BWP, RRC} configured by the upper layer except the initial DL bandwidth part. The bit width of this field is determined by B bits. here,

_-If , n _BWP = n _{BWP, RRC} +1, in this case, the bandwidth part indicator is defined in Table 6.

If the UE does not support active BWP change through DCI, the UE ignores this bit field.

는 활성 DL 대역폭 부분의 크기이다.-Frequency domain resource allocation-number of bits determined by below, where

Is the size of the active DL bandwidth portion.

_-If resource allocation type 0 is set, it is determined by N _RBG bit.

비트로 결정됨.-If resource allocation type 1 is set,

Determined in bits.

결정됨.-If set to resource allocation type 0 and 1,

Decided.

-If both resource allocation types 0 and 1 are configured, the MSB bit is used to indicate resource allocation type 0 or resource allocation type 1. Here, the bit value 0 indicates resource allocation type 0 and the bit value 1 indicates resource allocation type 1.

_-For resource allocation type 0, N _RBG provides resource allocation.

는 자원 할당을 제공한다.-For resource allocation type 1,

Provides resource allocation.

If the "bandwidth portion indicator" field indicates a bandwidth portion other than the active bandwidth portion, and if resource allocation types 0 and 1 are configured for the indicated bandwidth portion, the UE allocates resource allocation type 0 for the bandwidth portion indicated when the bit width is: Suppose The "frequency domain resource allocation" field of the active bandwidth portion is smaller than the bit width of the "frequency domain resource allocation" field of the displayed bandwidth portion.

비트로 결정됨, 여기서, I는 상위 계층 매개 변수 pdsch-AllocationList의 항목 수이다.-Time domain resource allocation: 0, 1, 2, 3, or 4 bits. The bandwidth for this field

Determined in bits, where I is the number of items in the upper layer parameter pdsch-AllocationList.

-VRB-to-PRT mapping: 0 or 1 bit

-0 bit only when resource allocation type 0 is set

-1 bit.

-PRB bundling size indicator: 0 bits if the upper layer parameter prb-BundlingType is not configured or set to 'static', 1 bit if the upper layer parameter prb-BundlingType is set to 'dynamic'.

-Rate matching indicator: 0, 1, or 2 bits according to the upper layer parameter rateMatchPattern

비트로 결정되고, 여기서 n _ZP는 상위 계층 파라미터 zp-CSI-RS-Resource에서 ZP CSI-RS 자원 셋들이다.-ZP CSI-RS trigger: 0, 1 or 2 bits. The bandwidth for this field

Determined in bits, where n _ZP is the ZP CSI-RS resource sets in the upper layer parameter zp-CSI-RS-Resource.

Transport block 1:

-Modulation and coding method: 5 bits

-New data indicator (NDI): 2 bits

Transport block 2 (exists when maxNrofCodeWordsScheduledByDCI equals 2)

-Modulation and coding method: 5 bits

-New data indicator (NDI): 1 bit

-Redundancy version-2 bits

If the "bandwidth part indicator" field indicates a bandwidth part other than the active bandwidth part and the value of maxNrofCodeWordsScheduledByDCI for the displayed bandwidth part is 2 and the value of maxNrofCodeWordsScheduledByDCI for the active bandwidth part is 1, the UE assumes that 0 is filled in interpretation. . The UE ignores the "modulation and coding scheme", "new data indicator" and "duplicate version" fields of transport block 2 for the indicated bandwidth portion.

-HARQ procedure number: 4 bits

-Downlink allocation index: the number of bits shown below

-When one or more cells are set in the downlink and the upper layer parameter pdsch-HARQ-ACK-Codebook = dynamic is set, 4 bits, where 2 MSB bits are counter DAI and 2 LSB bits are total DAI.

-When only one cell is set to DL and the upper layer parameter pdsch-HARQ-ACK-Codebook = dynamic, 2 bits, where 2 bits is the counter DAI.

-Otherwise, 0 bit

-TPC command for scheduled PUCCH: 2 bits

-PUCCH resource indicator: 3bits

로 결정되고, 여기서 I는 상위 계층 매개 변수 dl-DataToUL-ACK의 항목 수이다.-PDSCH-to-HARQ feedback timing indicator: 0, 1, 2, or 3 bits. The bandwidth for this field

Is determined, where I is the number of items in the upper layer parameter dl-DataToUL-ACK.

는 DMRS 포트의 순서에 따라 결정된다.-Antenna port (s): 4, 5 or 6 bits defined by the table below, where the number of CDM groups without data of values 1, 2 and 3 are individually CDM groups {0}, {0,1} and {0, 1,2}. Antenna port

Is determined according to the order of the DMRS ports.

If the UE is configured with both dmrs-DownlinkForPDSCH-MappingTypeA and dmrs-DownlinkForPDSCH-MappingTypeB, the bit width of this field is max {x _A , x _B }. Here, x _A is the "Antenna port" bit width derived according to dmrs-DownlinkForPDSCH-MappingTypeA, x _B is the "Antenna port" bit width derived according to dmrs-DownlinkForPDSCH-MappingTypeB. If the mapping type of PDSCH corresponds to smaller D and E values, MSC of this field is filled with many C 0s.

-Transmission setting indicator: 0 bit if upper layer parameter tci-PresentInDCI is not enabled, otherwise 3bit

-If the "bandwidth part indicator" field indicates a bandwidth part other than the active bandwidth part and the "transport configuration indication" field does not exist in DCI format 1_1, the UE assumes that tci-PresentInDCI is not activated for the indicated bandwidth part. .

-SRS request: if the UE is not configured for SUl in the cell, 2 bits, the first bit is a non-SUL / SUL indicator, and the second and third bits are set, 3 bits. This bit field may indicate an associated CSI-RS.

-CBG transmission information (CGBTI): 0, 2, 4, 6 or 8 bits, determined by upper layer parameters maxCodeBlockGroupsPerTransportBlock and Number-MCS-HARQ-DL-DCI for PDSCH.

-CGB flushing out information (CBGFI): 0 or 1 bit, determined by upper layer parameter codeBlockGroupFlushIndicator

-DMRS sequence initialization: 1 bit when both scramblingID0 and scramblingID1 are configured in DMRS-DownlinkConfig; 0 bits otherwise.

When DCI format 1_1 monitors DCI format 1_1 in multiple search spaces associated with multiple CORESETs, 0 is output until the payload size of DCI form bird 1_1 monitored in multiple search spaces equals the maximum payload size of DCI format 1_1 monitored. Can be added.

Table 6 shows the case where the antenna pods are 1000+ DMRS pods, the DMRS type is 1, and the maxLenth is 1.

Table 7 is a case where the antenna pods are 1000+ DMRS pods, and the DMRS type is 1 and maxLenth is 2.

Table 8 is a case where the antenna pods are 1000+ DMRS pods, the DMRS type is 2, and the maxLenth is 1.

Table 9 shows the case where the antenna pods are 1000+ DMRS pods, the DMRS type is 2, and the maxLenth is 2.

Cell navigation

Cell search is a procedure in which the UE acquires time and frequency synchronization with a cell and detects the physical layer cell ID of the cell. The UE receives the following synchronization signal (SS) to perform cell search: the primary synchronization signal (PSS) and the secondary synchronization signal (SSS).

The UE should assume that the reception points of the PBCH (Physical Broadcast Channel), PSS and SSS are continuous symbols to form an SS / PBCH block. The UE should assume that the SSS, PBCH DM-RS and PBCH data have the same EPRE. The UE can assume that the ratio of PSS EPRE to SSS EPRE in the SS / PBCH block of the corresponding cell is 0 dB or 3 dB.

The cell search procedure of the UE can be summarized in Table 10 below.

5 illustrates the SSB structure. The UE may perform cell search, system information acquisition, beam alignment for initial access, and DL measurement based on the SSB. SSB is mixed with SS / PBCH (Synchronization Signal / Physical Broadcast channel) block.

Referring to Figure 5, SSB is composed of PSS, SSS and PBCH. SSB is composed of four consecutive OFDM symbols, and PSS, PBCH, SSS / PBCH and PBCH are transmitted for each OFDM symbol. PSS and SSS are each composed of 1 OFDM symbol and 127 subcarriers, and PBCH is composed of 3 OFDM symbols and 576 subcarriers.

Polar coding and quadrature phase shift keying (QPSK) are applied to the PBCH. The PBCH is composed of a data RE and a DMRS (Demodulation Reference Signal) RE for each OFDM symbol. There are three DMRS REs for each RB, and three data REs exist between the DMRS REs.

hybrid Beam forming (Hybrid beamforming )

Existing beamforming techniques using multiple antennas are analog beamforming techniques and digital beams depending on where the beamforming weight vector / precoding vector is applied. It can be divided into a digital beamforming technique.

The analog beamforming technique is a beamforming technique applied to an initial multi-antenna structure. This is a method of forming a beam by branching an analog signal that has been processed digital signals into multiple paths, and then applying phase-shift (PS) and power amplifier (PA) settings for each path. Can mean

In order to form an analog beam, a structure is required in which PA and PS connected to each antenna process analog signals derived from a single digital signal. In other words, in the analog stage, the PA and the PS process complex weights.

6 shows an example of a block diagram of a transmitter composed of an analog beamformer and an RF chain. 5 is for convenience of description only and does not limit the scope of the present invention.

In FIG. 6, the RF chain means a processing block in which a baseband (BB) signal is converted into an analog signal. In the analog beam forming technique, beam accuracy is determined according to the characteristics of the elements of the PA and the PS, and may be advantageous for narrowband transmission due to the control characteristics of the elements.

In addition, in the case of the analog beam forming technique, since it is configured with a hardware structure that is difficult to implement multiple stream transmission, multiplexing gain for increasing the transmission rate is relatively small. Also, in this case, beam formation for each terminal based on orthogonal resource allocation may not be easy.

In contrast, in the case of a digital beamforming technique, beamforming is performed at a digital stage using a baseband (BB) process to maximize diversity and multiplexing gain in a MIMO environment.

7 shows an example of a block diagram of a transmitting end composed of a digital beamformer and an RF chain. 6 is for convenience of description only and does not limit the scope of the present invention.

In the case of FIG. 7, beam forming may be performed as precoding is performed in the BB process. Here, the RF chain includes a PA. This is because, in the case of a digital beamforming technique, complex weights derived for beamforming are directly applied to transmission data.

In addition, since different beamforming can be performed for each terminal, multiple user beamforming can be simultaneously supported. In addition, since independent beam formation is possible for each terminal to which orthogonal resources are allocated, scheduling flexibility is improved, and accordingly, it is possible to operate a transmitting end that meets the system purpose. In addition, when a technique such as MIMO-OFDM is applied in an environment supporting broadband transmission, an independent beam may be formed for each subcarrier.

Therefore, the digital beamforming technique can maximize the maximum transmission rate of a single terminal (or user) based on the system's capacity increase and enhanced beam gain. Based on the above-described features, a digital beamforming based MIMO technique has been introduced in an existing 3G / 4G (eg LTE (-A)) system.

In the NR system, a massive MIMO environment in which the transmit and receive antennas are greatly increased may be considered. In general, in cellular communication, it is assumed that the maximum transmit and receive antennas applied to the MIMO environment are eight. However, as a large MIMO environment is considered, the number of transmit / receive antennas may increase to tens or hundreds or more.

At this time, if the digital beamforming technique described above is applied in a large MIMO environment, the transmitter must perform signal processing for hundreds of antennas through a BB process for digital signal processing. Accordingly, the complexity of signal processing is very large, and the RF chain as many as the number of antennas is required, so the complexity of hardware implementation can also be very large.

In addition, the transmitting end needs independent channel estimation for all antennas. In addition, in the case of an FDD system, since the transmitting end needs feedback information for a large MIMO channel composed of all antennas, a pilot and / or feedback overhead may be very large.

On the other hand, if the analog beamforming technique described above is applied in a large MIMO environment, the hardware complexity of the transmitting end is relatively low.

On the other hand, the degree of increase in performance using multiple antennas is very small, and flexibility in resource allocation may be reduced. In particular, it is not easy to control a beam for each frequency in a broadband transmission.

Therefore, in a large MIMO environment, rather than exclusively selecting one of the analog beamforming and digital beamforming techniques, a hybrid-type transmission end configuration method in which the analog beamforming and digital beamforming structures are combined is required.

Analog beam scanning

In general, analog beamforming can be used in a pure analog beamforming transceiver and hybrid beamforming transceiver. At this time, analog beam scanning may perform estimation on one beam at the same time. Accordingly, the beam training time required for beam scanning is proportional to the total number of candidate beams.

As described above, in the case of analog beamforming, a beam scanning process in the time domain is necessarily required in order to estimate the transmission / reception end beams. At this time, the estimated time ts for the entire transmission / reception beam may be expressed as Equation 7 below.

In Equation 7, ts means the time required for one beam scanning, K _T means the number of transmit beams, and K _R means the number of receive beams.

8 shows an example of an analog beam scanning method.

In the case of FIG. 8, it is assumed that the total number of transmission beams K _T is L and the total number of reception beams K _R is 1. In this case, since the total number of candidate beams is a total of L, L time periods are required in the time domain.

In other words, since only one beam estimation can be performed in a single time interval for analog beam estimation, as shown in FIG. 10, L time intervals are required to perform all L beams P1 to PL estimation do. After the analog beam estimation procedure is finished, the terminal feeds back the identifier (eg ID) of the beam having the highest signal strength to the base station. That is, as the number of individual beams increases as the number of transmit and receive antennas increases, a longer training time may be required.

Since analog beamforming changes the size and phase angle of a continuous waveform in the time domain after a digital-to-analog converter (DAC), unlike digital beamforming, the training interval for individual beams needs to be guaranteed. There is. Therefore, as the length of the training section increases, the efficiency of the system may decrease (ie, the loss of the system increases).

9 is a view comparing a beam scanning application method. 9 (a) is an Exaustive search method and FIG. 9 (b) is a Multi-level search method.

The number of search spaces of the exaustive search method is shown in Table 11 below.

The number of search spaces of the multi-level search method is shown in Table 12 below.

In relation to the feedback, the Exaustive search method feeds back the best Tx beam ID. The multi-level search method feedbacks the best sector beam ID for the coarse beam and the best fine beam ID for the fine beam.

In relation to current industrial and standards, there are no related standards for the Exaustive search method, and there are 802.15.3c and 802.11 ad for the multi-level search method.

[1] J.Wang, Z. Lan, “Beam codebook based beamforming protocol for multi-Gbps millimeter-wave WPAN systems,” IEEE J. Select. Areas in Commun., Vol. 27, no. 8 [2] J.Kim, AFMolisch, “Adaptive Millimeter-Wave Beam Training for Fast Link Configuration,” USC CSI's 30th conference [3] T.Nitsche, “Blind Beam Steering: Removing 60 GHz Beam Steering Overhead,” It is done.

At NR  Reference signals in NR )

The DL (downlink) physical layer signal of the 3GPP NR system is as follows. For more details, refer to 3GPP TS 38.211 and TS 38.214.

-CSI-RS: signal for DL channel state information (CSI) acquisition, DL beam measurement

-TRS (tracking RS): Signal for fine time / frequency tracking of the terminal

-DL DMRS: RS for PDSCH demodulation

-DL PT-RS (phase-tracking RS): RS transmitted for phase noise compensation of the terminal

-Synchronization signal block (SSB): means a resource block composed of a specific number of symbols and resource blocks that are consecutive to the time / frequency side composed of primary synchronization signal (PSS), secondary SS and PBCH (+ PBCH DMRS) (signal within one SSB They apply the same beam)

In addition, UL (uplink) physical layer signal of the 3GPP NR system is as follows. Likewise, refer to 3GPP TS 38.211 and TS 38.214 for more details.

-SRS: Signal for UL channel state information (CSI) acquisition, UL beam measurement, antenna port selection

-UL DMRS: RS for PUSCH demodulation

-UL phase-tracking RS (PT-RS): RS transmitted for phase noise compensation of the base station

10, two types of RACH procedures will be described in NR.

FIG. 10 (a) is a contention-based RACH procedure, and FIG. 10 (b) is a contention-free RACH procedure.

11 shows an example of the overall RACH procedure.

First, the transmission of MSG1 will be described.

The subcarrier spacing for MSG1 is set in the RACH configuration and is provided in the handover command for the RA contention-free procedure for handover.

The preamble indexes for contention based random access (CBRA) and contention free random access (CFRA) are continuously mapped for one SSB in one RACH transmission opportunity.

-CBRA

: The association between the SS block (SSB) and a subset of RACH resources and / or preamble indexes within an SS burst set is set by a parameter set in RMSI.

-CFRA

: The UE may be configured to transmit multiple MSG1s through a dedicated multiple RACH transmission opportunity in the time domain before the end of the monitored RAR window.

And, the association between the CFRA preamble and the SSB is reset through UE-specific RRC.

Next, we will look at setting the random access response (MSG2).

The subcarrier spacing (SCS) for MSG2 is the same as the SCS of the maintenance minimum SI (RMSI).

And, for a non-competitive RA procedure for handover, it is provided in the handover command.

And, MSG2 is transmitted within the UE minimum DL BW.

The size of the RAR window is the same for all RACH opportunities and is set in the RMSI.

-Maximum window size: Depends on the worst gNB delay after receiving Msg1 including processing delay, scheduling delay, etc.

-Minimum window size: depends on duration of Msg2 or CORESET and scheduling delay.

Next, we will look at the timing advance (TA) command in MSG2.

Used to control the timing of uplink signal transmission.

First, in the case of LTE,

TA resolution is 16 Ts (Ts = 1 / (2048x15000)).

The TA range is 1282 x TA step size ~ 667.66. → 100.16

In the RAR, the timing advance (TA) has a value from 0 to 1,282, and consists of 11 bits.

For NR,

Used in TR38.913 for very long coverage (150Km to 300Km).

TA increases by 2,564 or 3,846 TA_steps (12its)

12 is a diagram showing an example of a TA.

RA-RNTI

RA_RNTI is determined by transmitting the timing of the PRACH Preamble by the UE.

That is, RA_RNTI may be determined by Equation 8 below.

In Equation 4, s_id represents the first OFDM symbol index (0≤s_id <14), t_id represents the first slot index in the system frame (0≤t_id <X), and X is fixed 80 for 120kHz SCS , F_id represents the frequency domain index (0≤f_id <Y), Y is a fixed 8 for the maximum #n of the FDM RO, and ul_carrier_id represents the indication of the UL carrier (0: normal, 1: SUL) .

The minimum gap between MSG2 and MSG3 is the duration of the N1 + duration of N2 + L2 + TA.

Here, N1, N2 are front loaded + additional DMRS and UE capability, L2 is MAC processing latency (500us), and TA is the same as the maximum timing advance value.

If MSG2 does not include a response to the transmitted preamble sequence,

After the duration of N1 + △ new + L2, a new preamble sequence is transmitted.

Table 13 shows an example of DCI format 1-0 with RA-RNTI.

Next, look at Message3.

MSG3 is scheduled by the uplink grant in RAR.

The MSG3 is transmitted after a minimum time interval from the end of MSG2.

The transmission power of MSG3 is set in MSG2.

The SCS for MSG3 is set in the RMSI containing 1 bit (independently from the SCS for MSG1).

MSG3 includes UE-Identity and establishment cause.

First, for UE-Identity, the IMSI is sent in the message when it first attaches to the network.

If the terminal was previously attached, the S-TMSI is included in the message.

And, the reasons for the establishment may include emergency, MO-signaling, MO-data, MT-access, high-priority access, and the like.

Table 14 below shows an example of DCI format 0-0 with TC-RNTI for MSG3 retransmission.

Let's take a look at MSG4 configuration.

MSG4 settings are limited within the UE minimum DL BW.

The SCS for MSG4 is identical to the numerology for RMSI and MSG2.

The minimum gap between the start of MSG4 and HARQ-ACK is N1 + L2.

Here, N1 is a UE processing time, and L2 is a MAC layer processing time.

Let's look at the distinction between MSG 3 retransmission order and MSG4.

MSG3 retransmission: DCI format 0-0 with TC-RNTI

MSG4: DCI format 1-0 with TC-RNTI

13 shows an example of MSG3 retransmission and MSG4 transmission.

Table 15 below shows an example of DCI format 1-0 having TC-RNTI for MSG4.

Hereinafter, the random access procedure of the NR system will be described in more detail.

The UE may transmit the PRACH preamble in UL as Msg1 of the random access procedure.

Two different length random access preamble sequences are supported. The long sequence length 839 is applied with subcarrier spacing of 1.25 and 5 kHz, and the short sequence length 139 is applied with subcarrier spacing 15, 30, 60 and 120 kHz. Long sequences support unrestricted sets and limited types of A and B sets, while short sequences support only unrestricted sets.

Multiple RACH preamble formats are defined by one or more RACH OFDM symbols and different cyclic prefix and guard time. The PRACH preamble configuration is provided to a terminal in system information.

When there is no response to Msg1, the UE may retransmit the PRACH preamble by power ramping within a predetermined number of times. The UE calculates PRACH transmission power for retransmission of the preamble based on the most recent estimated path loss and power ramping counter. When the terminal performs beam switching, the power ramping counter does not change.

The system information informs the UE of the association between SS blocks and RACH resources.

14 shows a concept of a threshold value of an SS block for RACH resource association.

Referring to FIG. 14, the threshold of the SS block for RACH resource association is based on RSRP and network configuration. The transmission or retransmission of the RACH preamble is based on an SS block that satisfies the threshold.

When the UE receives the random access response through the DL-SCH, the DL-SCH may provide timing alignment information, RA-preamble ID, initial UL approval and temporary C-RNTI. Based on the above information, the UE may perform UL transmission through UL-SCH as Msg3 of the random access procedure. Msg3 may include an RRC connection request and a UE identifier.

In response to the Msg3, the network may transmit Msg4, and Msg4 may be treated as a contention resolution message for DL. The terminal may enter the RRC connected state by receiving Msg4.

The detailed description of each step is as follows.

Before the physical random access procedure begins, Layer 1 must receive the SS / PBCH block index set from the upper layer and provide the RSRP measurement set corresponding to the upper layer.

Before the physical random access procedure starts, Layer 1 receives the following information from the upper layer.

-Configuration of physical random access channel (PRACH) transmission parameters (PRACH preamble format, time resource and frequency resource for PRACH transmission).

-PRACH preamble sequence set (logical root sequence table, cyclic shift () and set type (unrestricted, limit set A or limit set B) parameters for determining the root sequence and its cyclic shift).

From a physical layer point of view, the L1 random access procedure includes the transmission of a random access response (RAR) message with a random access preamble (Msg1), PDCCH / PDSCH (Msg2) in the PRACH, PUSCH transmission of Msg3, PDSCH for contention resolution It may include.

When the random access procedure is initiated by "PDCCH order" for the terminal, the random access preamble transmission has the same subcarrier spacing as the random access preamble transmission initiated by the upper layer.

When the UE is composed of two uplink carriers for the serving cell and detects "PDCCH order", the UL / SUL indicator field value from the "PDCCH order" detected is used to determine the uplink carrier for the corresponding random access. do.

With respect to the random access preamble transmission step, the physical random access procedure is triggered according to the request of PRACH transmission by upper layers or PDCCH command. The configuration by the upper layer for PRACH transmission includes:

-Configuration for PRACH transmission.

-Preamble index, preamble subcarrier spacing, P _{PRACH, target} , corresponding RA-RNTI and PRACH resources.

The preamble is transmitted using the PRACH format selected as the transmission power P _{PRACH, b, f, c} (i) on the indicated PRACH resource.

The UE is provided with a number of SS / PBCH blocks associated with one PRACH case by the value of the upper layer parameter SSB-perRACH-Occasion. If the SSB-perRACH-Occasion value is less than 1, one SS / PBCH block is mapped in the case of 1 / SSB-rach-occasion continuous PRACH.

The UE receives a number of preambles per SS / PBCH block by the value of the upper layer parameter cb-preamblePerSSB, and the total number of preambles per SSB per per SSACH (per SSB) according to the PRACH occasion, the values of SSB-perRACH-Occasion and cb-preamblePerSSB It is decided by the multiple of.

The SS / PBCH block index is mapped in the PRACH case in the following order.

-First, the order of preamble indexes increases within a single PRACH event.

-Second, the order of frequency resource indexes for the frequency multiplexed PRACH case increases.

-Third, the increasing order of the time resource index for the time multiplexed PRACH case in the PRACH slot.

-Fourth, the order of increasing index for the PRACH slot.

보다 크거나 같은 {1, 2, 4} PRACH 구성 기간 중에서 가장 작은 기간이다. 여기서 단말은 상위 계층 파라미터 SSB_transmitted-SIB1으로부터

를 얻는다.

는 하나의 PRACH 구성주기에 매핑될 수있는 SS / PBCH 블록들의 수이다.For mapping the SS / PBCH block to the PRACH case, the period starting from frame 0 is the period starting from frame 0

It is the smallest period among the {1, 2, 4} PRACH construction periods that are greater than or equal to. Here, the terminal is from the upper layer parameter SSB_transmitted-SIB1

Get

Is the number of SS / PBCH blocks that can be mapped to one PRACH configuration cycle.

msec보다 크거나 같은 경우이다.

는

심볼의 시간 길이이며 PUSCH processing capability 1에서

이 미리 설정되고

인 경우에 PUSCH preparation 시간에 대응된다.If the random access procedure is initiated by the PDCCH command, the terminal (if requested by the upper layer) should transmit the PRACH in the first possible PRACH occassion. The first possible PRACH occassion is the time between the last symbol of PDCCH order reception and the first symbol of PRACH transmission.

This is the case greater than or equal to msec.

The

Time length of the symbol and in PUSCH processing capability 1

Is being preset

In case of, it corresponds to PUSCH preparation time.

심볼인 Type1-PDCCH 공통 검색 공간에 대해 구성된 가장 빠른 제어 자원 세트의 제 1 심볼에서 시작한다. 윈도우의 길이는 Type0-PDCCH 공통 탐색 공간에 대한 부반송파 공간에 기초한 슬롯의 개수에 기초하여 상위 계층 파라미터 rar-WindowLength에 의해 제공된다.In response to the PRACH transmission, the terminal attempts to detect the PDCCH with the corresponding RA-RNTI during the window controlled by the upper layer. This window is the terminal at least after the last symbol of the preamble sequence transmission

The symbol, Type1-PDCCH, starts at the first symbol of the earliest set of control resources configured for the common search space. The length of the window is provided by the higher layer parameter rar-WindowLength based on the number of slots based on the subcarrier space for the Type0-PDCCH common search space.

When the UE detects a PDCCH having a corresponding PDSCH including a DL-SCH transport block in a corresponding RA-RNTI and a corresponding window, the UE transmits the transport block to a higher layer.

The upper layer parses the transport block for a random access preamble identifier (RAPID) associated with PRACH transmission. When the upper layer identifies RAPID in the RAR message (s) of the DL-SCH transport block, the upper layer indicates uplink permission for the physical layer. This indication is referred to as a random access response (RAR) UL grant at the physical layer. If the upper layer does not identify the RAPID associated with the PRACH transmission, the upper layer may indicate to the physical layer to transmit the PRACH.

msec와 같다. 여기서,

msec는 추가 PDSCH DM-RS가 구성되고

일 때 PDSCH capability 1에 대한 PDSCH 수신 시간에 대응하는

심볼의 지속 시간이다.The minimum time between the last symbol of PDSCH reception and the first symbol of PRACH transmission is

Same as msec. here,

msec is an additional PDSCH DM-RS is configured

Corresponds to PDSCH reception time for PDSCH capability 1

The duration of the symbol.

The UE should receive the PDCCH having the RA-RNTI corresponding to the PDSCH including the DL-SCH transport block having the same DM-RS antenna port quasi co-location attribute for the detected SS / PBCH block or the received CSI-RS. do. When the UE attempts to detect a PDCCH having a corresponding RA-RNTI in response to the PRACH transmission initiated by the PDCCH command, the UE assumes that the PDCCH and PDCCH order have the same DM-RS antenna port quasi co-location attribute. .

The RAR UL grant from the terminal (Msg3 PUSCH) schedules PUSCH transmission. The contents of the RAR UL grant starting with MSB and ending with LSB are shown in Table 16 below. Table 16 below summarizes the field sizes of random access response grant contents.

비트 필드는 아래 표 10에서 설명한 바와 같이 호핑 정보 비트로 사용된다.The Msg3 PUSCH frequency resource allocation is for uplink resource allocation type 1. For frequency hopping, the first or second bit of the Msg3 PUSCH frequency resource allocation, based on the indication of the frequency hopping flag field

The bit field is used as a hopping information bit as described in Table 10 below.

은 Msg3 PUSCH의 전원을 설정하는 데 사용되며 Msg3 PUSCH에 대한 TPC 명령

을 나타낸 아래 표 17에 따라 해석된다. The MCS is determined from the first 16 indexes of the corresponding MCS index table for PUSCH. TPC instruction

Is used to set the power of Msg3 PUSCH and TPC command for Msg3 PUSCH

It is interpreted according to Table 17 below.

In a non-contention based random access procedure, a CSI request field is interpreted to determine whether an aperiodic CSI report is included in a corresponding PUSCH transmission. In the contention-based random access procedure, the CSI request field is reserved.

The UE receives the subsequent PDSCH using the same subcarrier spacing as the PDSCH reception providing the RAR message, unless the subcarrier spacing is configured.

If the UE does not detect a PDCCH having a corresponding RA-RNTI and a corresponding DL-SCH transport block in a window, a procedure of receiving a random access response is performed.

For example, the terminal may perform power ramping for retransmission of the random access preamble based on the power ramping counter. However, as shown in FIG. 17, when the terminal performs beam switching in PRACH retransmission, the power ramping counter does not change.

Referring to FIG. 15, when the UE retransmits the random access preamble for the same beam, the power ramping counter may be increased by one. However, when the beam is changed, the power lamp counter does not change.

With regard to Msg3 PUSCH transmission, the upper layer parameter msg3-tp indicates to the UE whether to apply transform precoding for Msg3 PUSCH transmission. When the UE applies transform precoding to Msg3 PUSCH transmission with frequency hopping, the frequency offset for the second hop is given in Table 18 below. Table 18 shows the frequency offset for the second hop for Msg3 PUSCH transmission with frequency hopping.

The subcarrier interval for Msg3 PUSCH transmission is provided by the upper layer parameter msg3-scs. The UE must transmit PRACH and Msg3 PUSCH on the same uplink carrier of the same serving cell. UL BWP for Msg3 PUSCH transmission is indicated by SystemInformationBlockType1.

msec와 같다.

은 추가 PDSCH DM-RS가 구성 될 때 PDSCH 처리 능력 1에 대한 PDSCH 수신 시간에 해당하는

심볼의 지속 시간이다.

는 PUSCH processing capability 1에 대해 PUSCH 준비 시간에 해당하는

심볼의 지속 시간이다. 그리고

는 RAR 내의 TA 커맨드 필드에 의해 제공 될 수있는 최대 타이밍 조정 값이다.When the PDSCH and the PUSCH have the same subcarrier interval, the minimum time between the last symbol of the PDSCH reception carrying the RAR and the first symbol of the corresponding Msg3 PUSCH transmission scheduled by the RAR in the PDSCH for the UE is

Same as msec.

Corresponds to the PDSCH reception time for PDSCH processing capability 1 when an additional PDSCH DM-RS is configured

The duration of the symbol.

Corresponds to PUSCH preparation time for PUSCH processing capability 1

The duration of the symbol. And

Is the maximum timing adjustment value that can be provided by the TA command field within the RAR.

msec와 동일하다.

은 추가 PDSCH DM-RS가 구성될 때 PDSCH processing capability 1에 대한 PDSCH 수신 시간에 대응하는

심볼의 지속 시간이다.In response to the Msg3 PUSCH transmission indicating that the C-RNTI is not provided, the UE attempts to detect the PDCCH together with the TC-RNTI corresponding to scheduling the PDSCH including the UE contention resolution indentity. The UE transmits HARQ-ACK information in PUCCH in response to receiving the PDSCH having the UE contention resolution indentity. The minimum time between the last symbol of PDSCH reception and the first symbol of HARQ-ACK transmission is

Same as msec.

Corresponds to the PDSCH reception time for PDSCH processing capability 1 when an additional PDSCH DM-RS is configured.

The duration of the symbol.

<Main operation of this specification>

In this specification, a transmission / reception point (TRP) or a TRxP may be defined as an antenna array having one or more antenna elements that can be used in a network located in a specific geographic location in a specific area.

In this specification, a base station may be configured with one or more transmission and reception points. That is, CoMP (Coordinated Multiple Point) transmission may be supported through a plurality of transmission / reception points connected to the same base station or different base stations. An example of multi-point cooperative transmission is non-coherent joint transmission (NCJT), but is not necessarily limited thereto. The mismatched cooperative transmission technology corresponds to a transmission scheme in which transmission of a multi input-multi output (MIMO) layer is performed at two or more transmission points (TPs) without adaptive precoding across TPs.

In a multi-point cooperative transmission situation in which multiple transmission / reception points can transmit data to a single terminal, the channel conditions from different transmission / reception points to the terminal may vary according to transmission / reception points.

Therefore, a band having the best channel among a plurality of channels from a plurality of transmission / reception points to a terminal may vary according to each transmission / reception point. In this case, it can be said that it is most desirable from the viewpoint of the performance of the terminal to set a specific band having the best channel for each transmission / reception point to the terminal.

On the other hand, in the case of the existing technology, since only one field is defined for frequency resource allocation in DCI format 1_1 (DCI (Downlink Control Information) format 1_1) for downlink data scheduling, the base station is multiplexed. In the point cooperative transmission situation, different frequency resources cannot be allocated to different transmission / reception points.

This specification proposes various rules and methods for using the DCI format according to the existing technology, and allowing frequency resources to be independently allocated to different transmission / reception points in a multi-point cooperative transmission situation.

1. First embodiment: Indication of resource overlap through the most significant bit

In the first embodiment, when the base station sets a method capable of dynamically setting a specific one of a type 0 and a type 1 frequency resource allocation method, and instructs a UE to perform multi-point cooperative transmission, the frequency resource allocation method is Type 0 is set, the UE in the DCI format, the most significant bit (Most Significant Bit, MSB) of the DCI field indicating the frequency resource allocation method is fully overlapped (fully overlapped), partially overlapped (partially overlapped) or non-overlapping We propose a method that can be recognized as a bit representing a specific method among (non overlapped) methods.

Among the contents of the proposal, "the frequency resource allocation method is set in a manner that can dynamically set a specific method among type 0 and type 1" is defined in the existing technology (for example, TS 38.331), the base station signals to the terminal. It may mean that the upper layer parameter "resourceAllocation" in the PDSCH-Config IE (information element) is set to dynamicSwitch.

resourceAllocation is one of {resourceAllocationType0, resourceAllocationType1, dynamicSwitch} and can be set in the terminal through higher layer signaling.

For example, when resourceAllocation is set to resourceAllocationType0, a type 0 scheme among frequency resource allocation schemes is semi-static in the terminal, and when resourceAllocation is set to resourceAllocationType1, frequency resource allocation scheme is semi-static. Among them, the type 1 method is set in the terminal.

On the other hand, when resourceAllocation is set to dynamicSwitch, a specific method among type 0 and type 1 is dynamically set in the terminal through 1 bit in the DCI field defined for frequency resource allocation.

Among the contents of the proposal, an example in which "multipoint cooperative transmission operation is instructed to the terminal" is as follows. When two or more RS sets are included in the TCI-state dynamically indicated to the terminal, the terminal can recognize that the multipoint cooperative transmission operation is indicated. Here, the TCI-state can also be interpreted as a specific code-point defined in a field for indicating QCL (Quasi-co Located) in DCI.

When the entire overlapping scheme is set among the contents of the proposal, it may be a case that the most significant bit indicated by the base station through the DCI to the terminal is set to 0. In this case, the remaining bits except for 1 bit in the existing DCI field that the base station transmits to the terminal are interpreted using the type 0 method set in the most significant bit, and the resource allocation from the two transmission / reception points is overlapped or the same. It means the case.

Meanwhile, in the case of the partial / non-overlapping method, a case in which the most significant bit indicated by the base station through the DCI to the terminal is set to 1 is exemplified. In this case, it means that the UE makes the interpretation of the bits other than 1 bit different from each other in the DCI field, and the base station allocates independent resources for each transmission / reception point.

There are two types of frequency resource allocation methods: type 0 and type 1. The frequency resource allocation method applied for actual data scheduling may be set in the terminal through higher layer signaling.

In this case, the base station may semi-statically set one of type 0 and type 1 to the terminal, or may dynamically set a specific method of the two types through the highest 1 bit in DCI. When a specific method among the two types is dynamically set in the latter method, the total number of bits defined for frequency resource allocation in the DCI format is more of the bits for defining type 0 and type 1 together with the 1 bit, the highest bit described above. It can be a value with a large number of bits added. For example, if the number of bits required for type 0 is A bit, and the number of bits required for type 1 is B bit and A> B, the number of bits required for dynamic resource allocation becomes (A + 1) bits. The types 0 and 1 are briefly described as follows.

First, in the case of type 0, the base station defines a resource block group (RBG) of a different size according to the size of the bandwidth part (bandwidth part, BWP), and allocates to a terminal in the bandwidth part among them. This is a method of instructing a terminal of a resource block group as a bitmap in DCI format. The bandwidth part means a subset of a continuous common resource block (CRB), and the resource block group means a set of consecutive virtual resource blocks (VRB). Therefore, according to the resource allocation method of type 0, since certain bands can be selected in a resource block group size unit within a bandwidth part, scheduling freedom increases.

On the other hand, in the case of type 1, the base station is a method of indicating the number of consecutive resource blocks (RB) index and consecutive resource blocks in the bandwidth part to the terminal. Accordingly, the scheme has a merit of increasing scheduling granularity because scheduling can be reduced in units of 1 RB because only a contiguous band can be selected.

When comparing the above-described type 0 and type 1, a more suitable scheme for independent resource allocation for each transmission / reception point in a multi-point cooperative transmission situation can be regarded as type 0 with high scheduling freedom. This is because the base station can selectively schedule a desired band at each transmission / reception point to the terminal in the case of type 0, compared to the type 1 that can schedule only a continuous band.

That is, the type 0 scheme is more suitable than the type 1 scheme for independent resource allocation of each transmission / reception point in multi-point cooperative transmission due to scheduling freedom. In addition, when the resource allocation method of the frequency domain is set to the resource layer, the upper layer parameter in the PDSCH-Config IE (information element) of the existing technology through the upper layer signaling, the dynamicSwitch, the base station is a dynamic of a specific method of type 0 and type 1 One bit in DCI format is defined for phosphorus selection. In addition, a specific method selected by the base station among type 0 and type 1 through the corresponding 1 bit may be dynamically set to the terminal through DCI signaling.

In the first embodiment, when multi-point cooperative transmission is performed, the base station sets the frequency resource allocation method to the terminal through the upper layer signalry as a type 0, and the terminal dynamically operates between the type 0 method and the type 1 method. It is to recognize the existing 1 bit defined for the phosphorus selection as a bit indicating whether to independently allocate frequency resource allocation of each transmission / reception point.

16 shows an example in which the same frequency resource is allocated to different transmission / reception points through a single DCI signaling. 17 shows an example of allocating frequency resources independently / individually to different transmission / reception points through a single DCI signaling.

As shown in FIG. 16, the base station may set whether to independently allocate frequency resources in a whole overlapping manner, and may indicate to the UE whether to independently allocate the frequency resources through DCI. For example, the DCI is transmitted only at the transmission / reception point 1, and based on this, the terminal may acquire frequency resource allocation information of the transmission / reception point 1 and the transmission / reception point 2 based on the DCI received at the transmission / reception point 1.

In this case, since the independent allocation of frequency resource allocation is set in a whole overlapping manner, the terminal can recognize that the frequency resources allocated to the transmission / reception point 1 and the transmission / reception point 2 are the same.

Meanwhile, as illustrated in FIG. 17, when independent allocation of frequency resource allocation is set in a partial overlapping method by a base station, DCI may be transmitted to the terminal only at the transmission / reception point 1. In this case, the terminal may acquire frequency resource allocation information of the transmission / reception point 1 and the transmission / reception point 2 based on the DCI transmitted only at the transmission / reception point 1.

In this case, since the independent allocation of frequency resource allocation is set by the base station in a partial overlapping method, the frequency resources allocated to the transmission / reception point 1 and the transmission / reception point 2 may be different.

The UE recognizes the DCI field defined for frequency resource allocation based on rule information previously shared between the base station and the UE, and the first frequency resource allocation information allocated to the transmission / reception point 1 and the transmission / reception point 2 respectively based on the DCI field. And second frequency allocation information.

Rule information previously shared between the base station and the terminal will be described later.

In the following, a method for independently allocating resources from each transmission / reception point is proposed by the terminal recognizing the interpretation of bits other than 1 bit among the existing DCI fields for each transmission / reception point.

When the frequency resource allocation method is set to type 0, the base station may set the resource block group size P according to the bandwidth part size to the terminal through higher layer signaling. Table 19 below shows the P value, which is a resource block group size set according to the bandwidth part size.

According to the proposed method described in the first embodiment, when frequency resource allocation of each transmission / reception point is indicated as a partial / non-overlapping method, that is, independent allocation for each transmission / reception point, the terminal sets Table 19 as higher layer signaling from the base station. It can be recognized that the P value of is 2P. When the UE recognizes the resource block group size twice, the size of the bitmap for selecting a specific resource block group in the bandwidth part is reduced, so the base station defines it according to the existing method for resource allocation for one transmission / reception point. Resource allocation of different transmission / reception points may be independently indicated by the same number of bits.

2. Second embodiment: Resource block group size is doubled

In the second embodiment, the frequency resource allocation method is set to a method capable of dynamically setting a specific method among type 0 and type 1 methods, and the number of bits when the number of bits defined for frequency resource allocation in the DCI format is type 0 When the frequency resource allocation of each transmission / reception point is indicated as an independent allocation according to the method described in the first embodiment, the UE sets the resource block group size P value set as upper layer signaling to 2P. Recognize.

That is, in the second embodiment, the base station sets the frequency resource allocation method, and the terminal recognizes the size of the resource block group twice.

Table 20 below shows an example of adding the configuration 3 defined for independent resource allocation in multi-point cooperative transmission along with the resource block group size according to the bandwidth part size.

18 is a graph showing the number of bits required according to the bandwidth part size.

As shown in FIG. 18, it can be seen that as the bandwidth part sizes increase to 50, 100, 150, 200, and 250, the number of required bits increases.

Also, it can be seen that the number of required bits increases in the form of a step function.

Meanwhile, according to the method of the second embodiment described above, in order for the UE to recognize the P value of the resource block group size as 2P, and to use the predefined bits for independent resource allocation of different transmission / reception points, the resource block When the number of bits for the group size P is 2A, the number of bits for the resource block group size 2P must satisfy A, and in this case, each bit group can be used for resource allocation of different transmission / reception points as follows.

19 shows an example of the DCI format indicated to the UE when the number of bits is even.

That is, as shown in FIG. 19, when A is assumed to be 4, the DCI format includes bit groups 0 (Bit group 0) and B5, B6, B7, B8 bits including B1, B2, B3, and B4 bits. Bit group 1 may be included. In addition, in the DCI format, the most significant bit B0 may indicate one of the frequency resource allocation schemes (0: Conventional RA / 1: Proposed RA).

20 shows an example of a bit insufficient when the above proposal is applied in a section in which the size of the bandwidth part is 1-36.

Unlike the case shown in FIG. 19, when the number of bits for the resource block group size P is odd, the number of bits for the resource block group size 2P cannot satisfy A, so even if the resource block group size P is interpreted as 2P, two different Bit groups cannot be defined. Therefore, a method for solving this is proposed below.

In the example shown in FIG. 20, the size of a specific bit group may be determined using Equation 3 below.

는 복수의 비트 그룹 중에서 하나의 송수신 포인트의 자원 할당을 위해 이용되는 특정 비트 그룹의 크기를 의미하고,

는 i번째 대역폭 파트의 크기를 의미하며,

는 i번째 대역폭 파트의 시작 번호를 의미한다. In Equation 9,

Denotes the size of a specific bit group used for resource allocation of one transmission / reception point among a plurality of bit groups,

Is the size of the i-th bandwidth part,

Denotes the starting number of the i-th bandwidth part.

Here, the UE may interpret P as 2P, which is twice the value of the resource block group size set for higher layer signaling to the UE using the method according to the second embodiment. In this case, the number of resource block groups that the base station can indicate through the bitmap to the terminal is reduced by one. Accordingly, the base station may exclude the resource allocation from the resource block group or schedule the UE with another specific resource block group.

As an example of a method for scheduling together with another specific resource block group, a method in which a base station indicates two resource block groups through the most significant 1 bit (or the least significant 1 bit) of the bit group in which the number of bits is allocated to the terminal is small. have. For example, when the base station indicates two resource block group groups through one bit, the base station may indicate both adjacent resource block groups including the first resource block group or the last resource block group. This means that the size of the first resource block group or the last resource block group may be set smaller than the size of the resource block group set by upper layer signaling according to the starting index of the bandwidth part and the size of the bandwidth part. Because can be relatively small.

21 shows a DCI field indicated to the UE when the number of bits is odd.

As illustrated in FIG. 21, the B0 bit in the DCI field may indicate whether the bit indicating the frequency resource allocation scheme is an existing RA or an RA of the proposed scheme (0 or 1). Further, four bits, such as B1, B2, B3, and B4, may be a bit group 0 for resource allocation of transmission / reception point 0, and three bits, such as B5, B6, and B7, are a bit group for resource allocation of transmission / reception point 1 It can be 1.

20 and 21, based on the method described in the first and / or second embodiments, the DCI field for frequency resource allocation in a previously defined DCI format is used. Independent resource allocation is possible for frequency resources to be transmitted at different transmission and reception points.

Meanwhile, as shown in FIGS. 20 and 21, when the existing DCI field is divided into two bit groups and independent resource allocation is performed for each transmission / reception point, information on the DMRS port corresponding to each bit group is transmitted to the base station and the terminal. Should be shared between. For this, the following method can be applied.

When frequency resource allocation of each transmission / reception point is indicated as an independent allocation according to the schemes proposed in the first and second embodiments, resource allocation indicated by each bit group is sequentially assigned to different DMRS port groups. Can be mapped. In the case of downlink data transmission, resources may be mapped to each DMRS port.

That is, when different independent frequency resource allocation is performed in a single DCI field, information on a DMRS port corresponding to each resource allocation should be set in the terminal. To this end, each bit group is indicated by the base station / terminal. The resource allocation can be sequentially mapped to different DMRS port groups. In this case, different DMRS port groups may be mapped to different transmission / reception points to mean a set of DMRS ports having different QCL relationships. Here, the term DMRS port group can also be defined as a CDM group. For example, when DMRS port 1000 and DMRS port 1001 are set to DMRS port group 0, and DMRS port 1002 and DMRS port 1003 are set to DMRS port group 1, resource allocation indicated by bit group 0 is assigned to DMRS port group 0. Corresponding, resource allocation indicated by bit group 1 may correspond to DMRS port group 1, respectively.

The QCL relationship among the above may refer to information on qcl-Type1 / qcl-Type2, which is a higher layer parameter in TCI-State IE. For example, that DMRS port 1000 and DMRS port 1002 are set to different QCL relationships means that the value of qcl-Type1 / qcl-Type2 for DMRS port 1000 is the value of qcl-Type1 / qcl-Type2 for DMRS port 1002. It can mean different.

In the case of the second embodiment described above, even in the method according to the third embodiment below, even when the type 0 transmission is set in a semi-fixed manner from the base station to the terminal and the independent resource allocation method is set in a semi-fixed manner, The same can be applied.

3. Third embodiment: Recognize the resource block group size as a value satisfying the equation

The frequency resource allocation method is set to a method capable of dynamically setting a specific method among the type 0 and type 1 method, and is defined as the maximum number of bits when the number of bits defined for frequency resource allocation in the DCI format is type 1, wherein When the frequency resource allocation of each transmission / reception point is indicated as an independent allocation according to the proposed method described in the first embodiment, the UE can interpret the resource block group size P as a minimum value among candidate values satisfying Equation 10 below. have.

When the frequency resource allocation method is set to a method capable of dynamically setting a specific method among type 0 and type 1 methods, and is defined as the maximum number of bits when the number of bits defined for frequency resource allocation in DCI format is type 1, As shown in the example of FIG. 18, it can be seen that the difference in the number of bits for type 1 and type 0 varies greatly depending on the resource block group size. At this time, the method described in the third embodiment may be used as a method of defining a group of bits for independent resource allocation by making the most use of the predefined bits.

22 is a graph showing the size of a resource block group defined according to the third embodiment and the method of Table 20 based on the bandwidth part size.

가 홀수인 경우, 제2 실시예에서 설명한 비트 수가 홀수인 경우의 방식을 적용할 수 있다. 22, when each bit group is defined by applying the method of the third embodiment, the equation (10)

When is an odd number, the method in the case where the number of bits described in the second embodiment is an odd number can be applied.

In FIG. 22, since the maximum resource block group size is assumed to be 32, when the bandwidth part size is 257 or more, there is no resource block group size that can be supported, so it is indicated as 0. In this section, the operation of the proposed method may be limited, but it is also possible to increase the maximum resource block group size that can be assumed in the proposal (eg, 64) in order to support the proposed method in all sections.

<Operation of resource allocation by base station>

23 shows an example of a method in which a base station allocates frequency resources to a terminal based on the proposal of the present invention.

As shown in FIG. 23, first, the base station transmits higher layer configuration information related to frequency resource allocation to the terminal through higher layer signaling (S2301). As an example of the higher layer configuration information, as suggested in the above invention, a higher layer parameter “resourceAllocation” in PDSCH-Config IE defined in TS 38.331 is set to dynamicSwitch.

Subsequently, the base station transmits downlink control information related to frequency resource allocation to the terminal (S2303). An example of downlink control information may include dynamically setting a specific method among all overlapping schemes and partial / non-overlapping schemes through DCI fields defined for frequency resource allocation as proposed in the present invention.

Next, the base station maps the modulation symbol modulated from the information bits to a specific resource element according to the frequency resource allocation method included in the upper layer configuration information and the downlink control information (S2305). That is, the base station allocates frequency resources according to a specific method set in the terminal through processes S2301 and S2303 among all overlapping methods or partial / non-overlapping methods and maps modulation symbols to the allocated resource elements.

Finally, the base station converts the modulation symbol mapped to the resource element into a time domain signal and transmits it to the terminal (S2307).

Meanwhile, when a plurality of transmission / reception points are connected to different base stations, a procedure of exchanging information about frequency resource allocation between base stations may be added before the process of transmitting a signal to the multiple transmission / reception points in step S2307.

<Terminal resource allocation operation>

24 shows an example in which a terminal allocates resources based on data received from a base station based on the proposal of the present invention.

As illustrated in FIG. 24, first, the terminal receives the upper layer configuration information and acquires frequency resource allocation information for the data signal (S2401). As an example of the higher layer configuration information, as suggested in the above invention, a higher layer parameter “resourceAllocation” in PDSCH-Config IE defined in TS 38.331 is set to dynamicSwitch.

Subsequently, the terminal receives downlink control information and acquires frequency resource allocation information for the data signal (S2403). As an example of downlink control information, as suggested in the above specification, a specific method among all overlapping methods and partial / non-overlapping methods is dynamically set through a DCI field defined for frequency resource allocation.

Next, the terminal converts the received time-domain signal into a frequency-domain signal to map the modulation symbol to the resource element (S2405).

Lastly, the terminal restores information bits by demodulating and decoding received symbols of resource elements mapped with modulation symbols according to a specific method set in the terminal through processes S2300 and S2301, among all overlapping methods or partial / non-overlapping methods. (S2407).

<Resource allocation operation of base station during initial access process>

25 shows an example of a method for a base station to allocate frequency resources in an initial access process based on the proposal of the present invention.

The procedure illustrated in FIG. 25 will be described below. First, the base station transmits a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) to support the initial access process of the UE (S2501).

Next, the base station sets a resource region to which downlink control information indicative of scheduling information for transmission of the corresponding information is transmitted through the PBCH in order to transmit additional information necessary for the initial access process to the terminal, and downlink control in the corresponding region The information is transmitted to the terminal (S2503). For example, as an example of downlink control information, as suggested in the present invention, dynamically setting a specific method among all overlapping schemes and partial / non-overlapping schemes through DCI fields defined for frequency resource allocation may be used.

Next, the base station maps the modulation symbol modulated from the information bits to a specific resource element according to the frequency resource allocation method included in the downlink control information (S2505). That is, the base station allocates frequency resources according to a specific method set in the terminal through the process 3001 of the entire overlapping method or the partial / non-overlapping method and maps the modulation symbol to the allocated resource element.

Finally, the base station converts the modulation symbol mapped to the resource element into a time domain signal and transmits it to the terminal (S2507).

<Operation of the resource allocation of the terminal in the initial connection process>

26 shows an example in which a terminal allocates resources in an initial access process based on the proposal of the present specification.

As shown in FIG. 26, the UE receives a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) from the base station in order to perform an initial access process (S2601).

Next, the UE decodes the data bits transmitted through the PBCH and acquires resource region information of downlink control information indicating scheduling information of additional information transmission required for the initial access process based on the decoded information bits (S2603). .

Subsequently, the UE first receives downlink control information including frequency resource allocation related information and scheduling information for the corresponding data signal before the base station transmits the data signal (S2606).

Then, the terminal receives the data signal transmitted by the base station in the data transmission resource area included in the control information (S2607).

Subsequently, the terminal converts the received time domain signal into a frequency domain signal to map the modulation symbol to the resource element (S2609).

Lastly, the terminal restores information bits by demodulating and decoding received symbols of resource elements to which modulation symbols are mapped according to a specific method set in the terminal through the S2502 process among all overlapping methods or partial / non-overlapping methods ( S2611).

<Data transmission / reception operation of terminal / base station in this specification>

27 is a flowchart illustrating a method for receiving data by a terminal according to an embodiment of the present specification.

As illustrated in FIG. 27, the terminal may receive the size information of the resource block group determined based on the size of the bandwidth part from the base station and a resource allocation method for the terminal (S2701).

The terminal transmits downlink control information (DCI) including whether or not resource allocation for the first transmission point and the second transmission point (TRP) is overlapped from the base station through the first transmission / reception point. It can be received (S2703).

The terminal may receive data from the first transmission / reception point and the second transmission / reception point based on the size information of the resource block group and the downlink control information (S2705).

Particularly, the terminal can recognize the first size of the resource block group as a second size that is twice, and the second size of the first transmission / reception point through the first bit group in the field of the downlink control information. A first resource block group may be recognized, and a second resource block group of a second size for the second transmission / reception point may be recognized through a second bit group in the field of the downlink control information.

Here, the most significant bit in the field of the downlink control information may be characterized by indicating whether or not the resource allocation is overlapped.

Here, the most significant bit in the field of the downlink control information indicates whether the resource allocation for each of the first transmission / reception point and the second transmission / reception point is totally overlapped, partially overlapped, or non-overlapping. can do.

Here, the first resource block group and the second resource block group are sequentially mapped to the first CDM (Code Division Multiplexing) group set in the first transmission / reception point and the second CDM group set in the second transmission / reception point. It can be characterized as.

Here, the first CDM group and the second CDM group may be characterized by being a De-Modulation Reference Signal (DMRS) port group that is in a QCL (Quasi co-located) relationship with each other.

와 같으며, 여기서,

는 제1 비트 그룹 또는 제2 비트 그룹의 크기를 나타내며,

는 i번째 대역폭 파트의 크기를 의미하며,

는 i번째 대역폭 파트의 시작 번호를 의미할 수 있다. Here, when the first size of the resource block group is odd, the size of the first bit group or the second bit group may be determined using Equation 1 below, [Equation 1] ]silver

Is equal to, where:

Denotes the size of the first bit group or the second bit group,

Is the size of the i-th bandwidth part,

Can mean the starting number of the i-th bandwidth part.

Here, the resource allocation method may be characterized in that the resource block group to be allocated to the terminal in the bandwidth part is a type 0 resource allocation method that is indicated in a field of the downlink control information.

Here, the number of bits defined for frequency resource allocation in the downlink control information field may be defined as the maximum number of bits when the resource allocation method is the type 0.

Here, when the number of bits corresponding to the first size of the resource block group is the third size, the number of bits corresponding to the second size is a fourth size that is 1/2 of the third size. You can.

Here, when the number of bits corresponding to the second size is an odd number, it is characterized in that two resource block groups are recognized through the most significant bit of the bit group in which the number of bits is allocated among the first bit group and the second bit group. Can be done with

28 is a flowchart illustrating a data transmission method of a base station according to an embodiment of the present specification.

As shown in FIG. 28, first, the base station may transmit size information of a resource block group determined based on the size of a bandwidth part and a resource allocation method for the terminal (S2701).

The base station may transmit downlink control information (DCI) including whether or not resource allocation is overlapped for the first transmission / reception point and the second transmission / reception point (TRP) through the first transmission / reception point. (S2703).

The base station may transmit data through the first transmission / reception point and the second transmission / reception point based on the size information of the resource block group and the downlink control information (S2705).

<Example of communication system to which this specification applies>

29 illustrates a communication system 2900 applied to the present invention.

Referring to FIG. 29, a communication system 2900 applied to the present invention includes a wireless device, a base station and a network. Here, the wireless device means a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), 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 2910a, a vehicle 2910b-1, 2910b-2, an XR (eXtended Reality) device 2910c, a hand-held device 2910d, and a home appliance 2910e ), Internet of Thing (IoT) devices 2910f, and AI devices / servers 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 2910a may operate as a base station / network node to other wireless devices.

The wireless devices 2910a to 2910f may be connected to the network 300 through the base station 2920. AI (Artificial Intelligence) technology may be applied to the wireless devices 2910a to 2910f, and the wireless devices 2910a to 2910f 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 2910a to 2910f may communicate with each other through the base station 2920 / network 300, but may also directly communicate (e.g. sidelink communication) without going through the base station / network. For example, the vehicles 2910b-1 and 2910b-2 may directly communicate (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, sensor) or other wireless devices 2910a to 2910f.

Wireless communication / connections 150a, 150b, and 150c may be achieved between the wireless devices 2910a to 2910f / base station 2920, base station 2920 / base station 2920. 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, the wireless communication / connections 150a, 150b, 150c can transmit / receive signals through various physical channels.To this end, based on various proposals of the present invention, for the transmission / reception of 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.

<Example of wireless device to which this specification applies>

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

Referring to FIG. 30, the first wireless device 3010 and the second wireless device 3020 may transmit and receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {the first wireless device 3010, the second wireless device 3020} is {wireless device 2910x, base station 2920} and / or {wireless device 2910x, wireless device 2910x) in FIG. }.

The first wireless device 3010 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. Also, 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, the memory 104 is an instruction to perform some or all of the processes controlled by the processor 102, 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 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 invention, the wireless device may mean a communication modem / circuit / chip.

The second wireless device 3020 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. Further, 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 invention, the wireless device may mean a communication modem / circuit / chip.

Hereinafter, hardware elements of the wireless devices 3010 and 3020 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.

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 can be implemented using firmware or software in the form of code, instructions and / or instructions.

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 the present 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 may control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. In addition, one or more transceivers 106, 206 may be 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. , May be set to transmit and receive user data, control information, radio signals / channels, and the like referred to in procedures, proposals, methods, and / or operational 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 user data, control information, radio signals / channels, etc. using one or more processors 102, 202, and receive radio signals / channels from the RF band signal. 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.

<Example of using wireless devices to which this specification applies>

31 shows another example of a wireless device applied to the present invention. The wireless device may be implemented in various forms according to use-example / service (see FIG. 30).

Referring to FIG. 31, the wireless devices 3010 and 3020 correspond to the wireless devices 3010 and 3020 of FIG. 30, and various elements, components, units / units, and / or modules (module). For example, the wireless devices 3010 and 3020 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 of FIG. For example, the transceiver (s) 114 may include one or more transceivers 106,206 and / or one or more antennas 108,208 of FIG. 30. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls various operations of the wireless device. For example, the controller 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. In addition, the control unit 120 transmits 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. 29, 2910a), vehicles (FIGS. 29, 2910b-1, 4210b-2), XR devices (FIGS. 29, 2910c), portable devices (FIGS. 29, 2910d), and household appliances. (Fig. 29, 2910e), IoT device (Fig. 29, 2910f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environment device, It may be implemented in the form of an AI server / device (FIGS. 29 and 400), a base station (FIGS. 29 and 2920), and a network node. The wireless device may be movable or used in a fixed place depending on the use-example / service.

In FIG. 31, various elements, components, units / parts, and / or modules in the wireless devices 3010 and 3020 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 3010 and 3020, 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. In addition, each element, component, unit / unit, and / or module in the wireless devices 3010 and 3020 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. In 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. 31 will be described in more detail with reference to the drawings.

<Example of mobile device to which this specification applies>

32 illustrates a mobile device applied to the present invention. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), 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. 32, the mobile device 3010 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 a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130/140 in FIG. 29, respectively.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The controller 120 may perform various operations by controlling components of the portable device 3010. The controller 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / instructions required for driving the mobile device 2210. Also, the memory unit 130 may store input / output data / information. The power supply unit 140a supplies power to the portable device 3010, and may include a wire / wireless charging circuit, a battery, and the like. The interface unit 140b may support the connection between the mobile device 3010 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 the 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 radio 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.

<Example of AI device to which this specification applies>

33 illustrates an AI device applied to the present invention. 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. 33, the AI device 3010 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. 29, respectively.

The communication unit 110 uses wired / wireless communication technology to communicate with external devices such as other AI devices (eg, 22, 2210x, 2220, 400) or AI servers (eg, 400 in FIG. 29) (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 3010 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 3010 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. It is possible to control the components of the AI device 3010 to perform the operation. In addition, the control unit 120 collects historical information including the operation contents of the AI device 2210 or the user's feedback on the operation, and stores the information in the memory unit 130 or the running processor unit 140c, or the AI server ( 22, 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 3010. 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 3010. 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 internal information of the AI device 3010, ambient environment information of the AI device 3010, 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. 29 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. Further, 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.

34 illustrates an AI server applied to the present invention.

Referring to FIG. 34, the AI server (FIGS. 29 and 400) may refer to an apparatus for learning an artificial neural network using a machine learning algorithm or using a trained artificial neural network. Here, the AI server 400 may be composed of a plurality of servers to perform distributed processing, or may be defined as a 5G network. At this time, the AI server 400 is included as a configuration of a part of the AI device (FIGS. 33 and 3010), and may perform at least a part of the AI processing together.

The AI server 400 may include a communication unit 410, a memory 430, a running processor 440, a processor 460, and the like. The communication unit 410 may transmit and receive data with an external device such as an AI device (FIGS. 33 and 3010). The memory 430 may include a model storage unit 431. The model storage unit 431 may store a model (or artificial neural network, 431a) being trained or trained through the learning processor 440. The learning processor 440 may train the artificial neural network 431a using learning data. The learning model may be used while being mounted on the AI server 400 of the artificial neural network, or may be mounted on an external device such as an AI device (FIGS. 33 and 3010). The learning model can be implemented in hardware, software, or a combination of hardware and software. When part or all of the learning model is implemented in software, one or more instructions constituting the learning model may be stored in the memory 430. The processor 460 may infer a result value for the new input data using the learning model, and generate a response or control command based on the inferred result value.

The AI server 400 and / or the AI device 3010 includes a robot 2910a, a vehicle 2910b-1, 2910b-2, and an eXtended Reality (XR) device 2910c through a network (FIGS. 29 and 300), It may be applied in combination with a hand-held device 2910d, a home appliance 2910e, or an Internet of Thing (IoT) device 2910f. AI technology applied robot (2910a), vehicle (2910b-1, 2910b-2), XR (eXtended Reality) device (2910c), mobile device (Hand-held device) (2910d), home appliance (2910e), IoT (Internet) of Thing) device 2910f may be referred to as an AI device.

Hereinafter, examples of the AI device will be described.

(Example 1 AI device-AI + Robot)

The robot 2910a is applied with AI technology, and may be implemented as a guide robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, and an unmanned flying robot. The robot 2910a may include a robot control module for controlling the operation, and the robot control module may mean a software module or a chip implemented with hardware. The robot 2910a acquires state information of the robot 2910a using sensor information obtained from various types of sensors, detects (recognizes) surrounding environment and objects, generates map data, or moves and travels. You can decide on a plan, determine a response to user interaction, or determine an action. Here, the robot 2910a may use sensor information acquired from at least one sensor among a lidar, a radar, and a camera in order to determine a movement path and a driving plan.

The robot 2910a may perform the above operations using a learning model composed of at least one artificial neural network. For example, the robot 2910a may recognize a surrounding environment and an object using a learning model, and may determine an operation using the recognized surrounding environment information or object information. Here, the learning model may be directly learned from the robot 2910a, or may be learned from an external device such as the AI server 400. At this time, the robot 2910a may perform an operation by generating a result using a direct learning model, but transmits sensor information to an external device such as the AI server 400 and receives the generated result accordingly to perform the operation. You may.

The robot 2910a determines a moving path and a driving plan using at least one of map data, object information detected from sensor information, or object information obtained from an external device, and controls the driving unit to determine the determined moving path and driving plan. Accordingly, the robot 2910a can be driven. The map data may include object identification information for various objects arranged in a space where the robot 2910a moves. For example, the map data may include object identification information for fixed objects such as walls and doors and movable objects such as flower pots and desks. In addition, the object identification information may include a name, type, distance, and location.

The robot 2910a may perform an operation or travel by controlling a driving unit based on a user's control / interaction. At this time, the robot 2910a may acquire intention information of an interaction according to a user's motion or voice utterance, and may perform an operation by determining a response based on the obtained intention information.

(2nd AI device example-AI + autonomous driving)

Autonomous vehicles 2910b-1 and 2910b-2 are applied with AI technology, and may be implemented as a mobile robot, a vehicle, or an unmanned aerial vehicle. The autonomous driving vehicles 2910b-1 and 2910b-2 may include an autonomous driving control module for controlling an autonomous driving function, and the autonomous driving control module may refer to a software module or a chip implemented with hardware. The autonomous driving control module may be included therein as a configuration of the autonomous driving vehicles 2910b-1 and 2910b-2, but may be configured and connected to the outside of the autonomous driving vehicles 2910b-1 and 2910b-2 with separate hardware. .

The autonomous vehicles 2910b-1 and 2910b-2 acquire status information of the autonomous vehicles 2910b-1 and 2910b-2 using sensor information obtained from various types of sensors, or acquire surrounding environment and objects. It can detect (recognize), generate map data, determine travel paths and driving plans, or determine actions. Here, the autonomous vehicle 2910b-1, 2910b-2 uses sensor information obtained from at least one sensor among a lidar, a radar, and a camera, like the robot 2910a, to determine a movement path and a driving plan. You can. In particular, the autonomous driving vehicles 2910b-1 and 2910b-2 receive or recognize sensor information from external devices or an environment or object for an area where a field of view is obscured or a certain distance or more, or are recognized directly from external devices. Information can be received.

The autonomous vehicles 2910b-1 and 2910b-2 may perform the above operations using a learning model composed of at least one artificial neural network. For example, the autonomous driving vehicles 2910b-1 and 2910b-2 may recognize the surrounding environment and objects using a learning model, and may determine a driving line using the recognized surrounding environment information or object information. Here, the learning model may be learned directly from the autonomous vehicles 2910b-1 and 2910b-2, or may be learned from an external device such as the AI server 400. At this time, the autonomous driving vehicle 2910b-1 and 2910b-2 may perform an operation by generating a result using a direct learning model, but transmit sensor information to an external device such as the AI server 400 and generate accordingly The received result may be received to perform the operation.

The autonomous driving vehicles 2910b-1 and 2910b-2 determine a movement path and a driving plan using at least one of map data, object information detected from sensor information, or object information obtained from an external device, and control a driving unit The autonomous vehicles 2910b-1 and 2910b-2 may be driven according to the determined travel route and driving plan. The map data may include object identification information for various objects arranged in a space (for example, a road) in which the autonomous vehicles 2910b-1 and 2910b-2 travel. For example, the map data may include object identification information for fixed objects such as street lights, rocks, buildings, and movable objects such as vehicles and pedestrians. In addition, the object identification information may include a name, type, distance, and location.

The autonomous vehicles 2910b-1 and 2910b-2 may perform an operation or travel by controlling a driving unit based on a user's control / interaction. At this time, the autonomous driving vehicles 2910b-1 and 2910b-2 may acquire intention information of an interaction according to a user's motion or voice utterance, and may perform an operation by determining a response based on the obtained intention information.

(3rd AI device example-AI + XR)

XR device 2910c is applied with AI technology, HMD (Head-Mount Display), HUD (Head-Up Display) provided in a vehicle, television, mobile phone, smart phone, computer, wearable device, home appliance, digital signage , It can be implemented as a vehicle, a fixed robot or a mobile robot. The XR device 2910c analyzes 3D point cloud data or image data obtained through various sensors or from an external device to generate location data and attribute data for 3D points, thereby providing information about surrounding spaces or real objects. The XR object to be acquired and output can be rendered and output. For example, the XR device 2910c may output an XR object including additional information about the recognized object in correspondence with the recognized object.

The XR device 2910c may perform the above operations using a learning model composed of at least one artificial neural network. For example, the XR device 2910c may recognize a real object from 3D point cloud data or image data using a learning model, and provide information corresponding to the recognized real object. Here, the learning model may be learned directly from the XR device 2910c or may be learned from an external device such as the AI server 400. At this time, the XR device 2910c may perform an operation by generating a result using a direct learning model, but transmits sensor information to an external device such as the AI server 400 and receives the generated result accordingly. You can also do

(4th AI device example-AI + Robot + Autonomous driving)

The robot 2910a is applied with AI technology and autonomous driving technology, and may be implemented as a guide robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, and an unmanned flying robot. The robot 2910a to which AI technology and autonomous driving technology are applied may mean a robot itself having an autonomous driving function or a robot 2910a that interacts with autonomous driving vehicles 2910b-1 and 2910b-2. The robot 2910a having an autonomous driving function may move itself according to a given moving line without user control or may determine collectively moving devices. The robot 2910a with autonomous driving function and the autonomous vehicle 2910b-1, 2910b-2 may use a common sensing method to determine one or more of a travel path or a driving plan. For example, the robot 2910a and the autonomous vehicle 2910b-1, 2910b-2 having an autonomous driving function may use one or more of a movement path or a driving plan using information sensed through a lidar, a radar, or a camera. Can decide.

The robot 2910a interacting with the autonomous vehicles 2910b-1 and 2910b-2 exists separately from the autonomous vehicles 2910b-1 and 2910b-2, and the autonomous vehicles 2910b-1 and 2910b-2 ) May be connected to an autonomous driving function from inside or outside, or may be performed in conjunction with a user who boards the autonomous driving vehicles 2910b-1 and 2910b-2. At this time, the robot 2910a that interacts with the autonomous vehicles 2910b-1 and 2910b-2 acquires sensor information on behalf of the autonomous vehicles 2910b-1 and 2910b-2 to autonomously drive the vehicle 2910b-1. , 2910b-2) or by acquiring sensor information and generating surrounding environment information or object information to the autonomous driving vehicles 2910b-1 and 2910b-2, thereby autonomous driving vehicles 2910b-1 and 2910b-2 ) Can control or assist the autonomous driving function.

The robot 2910a that interacts with the autonomous vehicles 2910b-1 and 2910b-2 monitors a user who has boarded the autonomous vehicle 2910b or interacts with the user to autonomously drive the vehicles 2910b-1 and 2910b. The function of -2) can be controlled. For example, the robot 2910a activates the autonomous driving function of the autonomous vehicle 2910b-1. 2910b-2 or the autonomous vehicle 2910b-1, 2910b-2 when it is determined that the driver is in a drowsy state. Control of the driving unit can be assisted. Here, the functions of the autonomous driving vehicles 2910b-1 and 2910b-2 controlled by the robot 2910a are not only autonomous driving functions, but also navigation systems provided inside the autonomous driving vehicles 2910b-1 and 2910b-2. However, functions provided by the audio system may also be included.

The robot 2910a interacting with the autonomous vehicles 2910b-1 and 2910b-2 is informed to the autonomous vehicles 2910b-1 and 2910b-2 from outside the autonomous vehicles 2910b-1 and 2910b-2. Can provide or assist a function. For example, the robot 2910a may provide traffic information including signal information to autonomous vehicles 2910b-1 and 2910b-2, such as smart traffic lights, or autonomous vehicles (such as automatic electric chargers for electric vehicles). 2910b-1, 2910b-2) to automatically connect an electric charger to the charging port.

(Example 5 AI device-AI + Robot + XR)

The robot 2910a is applied with AI technology and XR technology, and may be implemented as a guide robot, a transport robot, a cleaning robot, a wearable robot, an entertainment robot, a pet robot, an unmanned flying robot, and a drone. The robot 2910a to which the XR technology is applied may mean a robot that is an object of control / interaction within an XR image. In this case, the robot 2910a is separated from the XR device 2910c and can be interlocked with each other.

When the robot 2910a, which is the object of control / interaction within the XR image, acquires sensor information from sensors including the camera, the robot 2910a or the XR device 2910c generates an XR image based on the sensor information. And, the XR device 2910c may output the generated XR image. In addition, the robot 2910a may operate based on a control signal input through the XR device 2910c or a user's interaction. For example, the user can check the XR image corresponding to the viewpoint of the robot 2910a remotely linked through an external device such as the XR device 2910c, and adjust the autonomous driving path of the robot 2910a through interaction. , You can control the operation or driving, or check the information of the surrounding objects.

(Example 6th AI device-AI + Autonomous driving + XR)

Autonomous driving vehicles 2910b-1 and 2910b-2 are applied with AI technology and XR technology, and may be implemented as a mobile robot, a vehicle, or an unmanned aerial vehicle. An autonomous vehicle with applied XR technology (2910b-1, 2910b-2) means an autonomous vehicle equipped with a means for providing an XR image, or an autonomous vehicle that is an object of control / interaction within an XR image. can do. In particular, the autonomous driving vehicles 2910b-1 and 2910b-2, which are targets of control / interaction within the XR image, are separated from the XR device 2910c and may be interlocked with each other.

Autonomous vehicles 2910b-1 and 2910b-2 having means for providing XR images may acquire sensor information from sensors including a camera and output XR images generated based on the obtained sensor information. have. For example, the autonomous vehicle 2910b-1 may provide an XR object corresponding to a real object or an object on the screen to the occupant by outputting an XR image with a HUD. At this time, when the XR object is output to the HUD, at least a portion of the XR object may be output so as to overlap with an actual object facing the occupant's gaze. On the other hand, when the XR object is output to a display provided inside the autonomous vehicle 2910b-1, 2910b-2, at least a part of the XR object may be output to overlap with an object in the screen. For example, the autonomous vehicles 2910b-1 and 2910b-2 may output XR objects corresponding to objects such as lanes, other vehicles, traffic lights, traffic signs, motorcycles, pedestrians, buildings, and the like.

Autonomous driving vehicles 2910b-1 and 2910b-2, which are targets of control / interaction within an XR image, when sensor information is acquired from sensors including a camera, autonomous driving vehicles 2910b-1 and 2910b-2 ) Or the XR device 2910c may generate an XR image based on sensor information, and the XR device 2910c may output the generated XR image. In addition, the autonomous vehicles 2910b-1 and 2910b-2 may operate based on a user's interaction or a control signal input through an external device such as an XR device 2910c.

<Notes related to this specification>

In the present specification, the wireless device is a base station, a network node, a transmitting terminal, a receiving terminal, a wireless device, a wireless communication device, a vehicle, a vehicle equipped with an autonomous driving function, a drone (Unmanned Aerial Vehicle, UAV), AI (Artificial Intelligence) module, Robots, Augmented Reality (AR) devices, Virtual Reality (VR) devices, MTC devices, IoT devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, or other areas of the fourth industrial revolution or It may be a device related to 5G service. For example, a drone may be a vehicle that does not ride and is flying by radio control signals. For example, the MTC device and the IoT device are devices that do not require direct human intervention or manipulation, and may be smart meters, bending machines, thermometers, smart bulbs, door locks, and various sensors. For example, a medical device is a device used for the purpose of diagnosing, treating, reducing, treating or preventing a disease, a device used for examining, replacing or modifying a structure or function, medical equipment, surgical device, ( In vitro) diagnostic devices, hearing aids, surgical devices, and the like. For example, a security device is a device installed to prevent a risk that may occur and to maintain safety, and may be a camera, CCTV, black box, or the like. For example, a fintech device is a device that can provide financial services such as mobile payment, and may be a payment device, point of sales (POS), or the like. For example, a climate / environment device may mean a device that monitors and predicts the climate / environment.

The three main requirements areas of 5G are: (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Super-reliability and Ultra-reliable and Low Latency Communications (URLLC) domain.

Some use cases may require multiple areas for optimization, and other use cases may focus on only one key performance indicator (KPI). 5G is a flexible and reliable way to support these various use cases.

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, it is expected that voice will be processed as an application program simply using the data connection provided by the communication system. The main causes for 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. And, cloud storage is a special use case that drives the growth of uplink data transfer rate. 5G is also used for remote work in the cloud, requiring much lower end-to-end delay to maintain a good user experience when a tactile interface is used. Entertainment For example, cloud gaming and video streaming are another key factor in increasing demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including 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.

In addition, one of the most anticipated 5G use cases is the ability to seamlessly connect embedded sensors in all fields, namely mMTC. It is predicted that by 2020, there will be 20.4 billion potential IoT devices. 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 includes new services that will transform the industry through ultra-reliable / low-latency links, such as remote control of the main infrastructure and self-driving vehicles. Reliability and level of delay are essential for smart grid control, industrial automation, robotics, drone control and coordination.

Next, a number of use cases 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. This fast speed is required to deliver TV in 4K (6K, 8K and higher) resolutions as well as virtual and augmented reality. Virtual Reality (VR) and Augmented Reality (AR) applications include almost immersive sports events. Certain application programs 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, along with many use cases for mobile communications to vehicles. For example, entertainment for passengers requires simultaneous high capacity and high mobility mobile broadband. The reason is that future users continue to expect high quality connections regardless of their location and speed. Another example of application in the automotive field is the augmented reality dashboard. It identifies objects in the dark over what the driver sees through the front window, and superimposes and displays information telling 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 to reduce the risk of accidents by guiding alternative courses of action to make driving safer. The next step will be remote control or a self-driven vehicle. This requires very reliable and very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, self-driving vehicles will perform all driving activities, and drivers will focus only on traffic beyond which the vehicle itself cannot identify. The technical requirements of self-driving vehicles require ultra-low delays and ultra-high-speed reliability to increase traffic safety to levels beyond human reach.

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 the 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 are typically 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 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 can help reduce barriers to distance and 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 cables with wireless links 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 freight tracking are important use cases for mobile communications that enable the tracking of inventory and packages from anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates, but require wide range and reliable location information.

In the present specification, the terminal is a mobile phone, a smart phone, a laptop computer, a terminal for digital broadcasting, a personal digital assistants (PDA), a portable multimedia player (PMP), navigation, a slate PC, a tablet PC (tablet PC), ultrabook, wearable device (e.g., watch type terminal (smartwatch), glass type terminal (smart glass), head mounted display (HMD)), foldable device And the like. For example, the HMD is a display device in a form worn on the head, and may be used to implement VR or AR.

The embodiments described above are those in which components and features of the present specification are combined in a predetermined form. Each component or feature should be considered optional unless stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, it is also possible to configure an embodiment of the present specification by combining some components and / or features. The order of the operations described in the embodiments of the present specification may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is apparent that claims that do not have an explicit citation relationship in the claims can be combined to form an embodiment or included as a new claim by correction after filing.

Embodiments according to the present specification may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. For implementation by hardware, one embodiment of the present specification includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present specification may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in memory and driven by a processor. The memory is located inside or outside the processor, and can exchange data with the processor by various means already known.

It will be apparent to those skilled in the art that the present specification may be embodied in other specific forms without departing from essential features of the present specification. Therefore, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present specification should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the present specification are included in the scope of the present specification.

Although this specification has been mainly described as an example applied to the 3GPP LTE / LTE-A / NR system, it can be applied to various wireless communication systems in addition to the 3GPP LTE / LTE-A / NR system.

Claims (20)

In a method of receiving data from a base station in a wireless communication system supporting Coordinated Multiple Point (CoMP), Receiving size information of a resource block group determined based on a size of a bandwidth part from the base station and a resource allocation method for the terminal; Receiving downlink control information (DCI) including whether or not the resource allocation for the first transmission point and the second transmission point (Transmission Reception Point, TRP) from the base station is received through the first transmission and reception point step; Including the size of the resource block group and the downlink control information, receiving data from the first transmission / reception point and the second transmission / reception point; The step of receiving the data, Recognizing the first size of the resource block group as a second size that is twice, Recognizing a first resource block group of a second size for the first transmission / reception point through a first bit group in the field of the downlink control information, and And recognizing a second resource block group of a second size for the second transmission / reception point through a second bit group in the field of the downlink control information. Way. According to claim 1, The most significant bit in the field of the downlink control information indicates whether or not the resource allocation is superimposed, Way. According to claim 2, The most significant bit in the field of the downlink control information indicates whether the resource allocation for each of the first transmission / reception point and the second transmission / reception point is totally overlapped, partially overlapped, or non-overlapping, Way. According to claim 1, The first resource block group and the second resource block group are sequentially mapped to a first code division multiplexing (CDM) group set at the first transmission / reception point and a second CDM group set at the second transmission / reception point. doing, Way. According to claim 4, The first CDM group and the second CDM group are characterized by being a De-Modulation Reference Signal (DMRS) port group having a quasi co-located (QCL) relationship with each other, Way. According to claim 1, When the first size of the resource block group is odd, characterized in that the size of the first bit group or the second bit group is determined using Equation 1 below, Way.  [Equation 1]

here,

Denotes the size of the first bit group or the second bit group,

Is the size of the i-th bandwidth part,

Is the starting number of the i-th bandwidth part) According to claim 1, The resource allocation method is characterized in that the type 0 resource allocation method is a method of indicating the resource block group to be allocated to the terminal in the bandwidth part in the downlink control information field. Way. The method of claim 7, The number of bits defined for frequency resource allocation in the downlink control information field is defined as the maximum number of bits when the resource allocation method is the type 0, Way. According to claim 1, When the number of bits corresponding to the first size of the resource block group is a third size, the number of bits corresponding to the second size is a fourth size that is 1/2 of the third size, Way. According to claim 1, When the number of bits corresponding to the second size is an odd number, two resource block groups are recognized through the most significant bit of the bit group in which the number of bits is allocated among the first bit group and the second bit group. , Way. In a terminal that receives data from a base station in a wireless communication system that supports Coordinated Multiple Point (CoMP), Communication unit for transmitting and receiving wireless signals; Processor; And And at least one computer memory operatively connectable to the processor and storing instructions to perform operations when executed by the at least one processor, The above operations, Receiving size information of a resource block group determined based on a size of a bandwidth part from the base station and a resource allocation method for the terminal; Receiving downlink control information (DCI) including whether or not the resource allocation for the first transmission point and the second transmission point (Transmission Reception Point, TRP) from the base station is received through the first transmission and reception point step; Including the size of the resource block group and the downlink control information, receiving data from the first transmission / reception point and the second transmission / reception point; The step of receiving the data, Recognizing the first size of the resource block group as a second size that is twice, Recognizing a first resource block group of a second size for the first transmission / reception point through a first bit group in the field of the downlink control information, and And recognizing a second resource block group of a second size for the second transmission / reception point through a second bit group in the field of the downlink control information. Terminal. The method of claim 11, The most significant bit in the field of the downlink control information indicates whether or not the resource allocation is superimposed, Terminal. The method of claim 12, The most significant bit in the field of the downlink control information indicates whether the resource allocation for each of the first transmission / reception point and the second transmission / reception point is totally overlapped, partially overlapped, or non-overlapping, Terminal. The method of claim 11, The first resource block group and the second resource block group are sequentially mapped to a first code division multiplexing (CDM) group set at the first transmission / reception point and a second CDM group set at the second transmission / reception point. doing, Terminal. The method of claim 14, The first CDM group and the second CDM group are characterized by being a De-Modulation Reference Signal (DMRS) port group having a quasi co-located (QCL) relationship with each other, Terminal. The method of claim 11, When the first size of the resource block group is odd, characterized in that the size of the first bit group or the second bit group is determined using Equation 1 below, Terminal.  [Equation 1]

here,

Denotes the size of the first bit group or the second bit group,

Is the size of the i-th bandwidth part,

Is the starting number of the i-th bandwidth part) The method of claim 11, The resource allocation method is a type 0 resource allocation method, which is a method in which the resource block group to be allocated to the terminal in the bandwidth part is indicated in a field of the downlink control information, Terminal. The method of claim 17, The number of bits defined for frequency resource allocation in the downlink control information field is defined as the maximum number of bits when the resource allocation method is the type 0, Terminal. The method of claim 11, When the number of bits corresponding to the first size of the resource block group is a third size, the number of bits corresponding to the second size is a fourth size that is 1/2 of the third size, Terminal. The method of claim 11, When the number of bits corresponding to the second size is an odd number, two resource block groups are recognized through the most significant bit of the bit group in which the number of bits is allocated among the first bit group and the second bit group. , Terminal.

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