KR20220058518A - Method for wireless resource scheduling in wireless communication system - Google Patents

Abstract

Provided are a method and apparatus for scheduling wireless resources in a wireless communication system to minimize the least used resources of lower-priority user equipment (UE). According to one embodiment of the present invention, the method schedules scheduling wireless resources in a wireless communication system including a lower-priority UE and a higher-priority UE by one or more processors of the lower-priority UE. The method comprises the following steps of: transmitting at least one of messages related to UE capability to a base station, wherein the transmitted message includes information on the minimum number of symbols for data transmission; checking information about a first resource block (RB) allocated through a UE-specific search space (USS) from the base station; and when the number of symbols occupied by the first RB is greater than or equal to the minimum number of symbols for data transmission, transmitting uplink data to the base station on the basis of competition in relation to other lower-priority UEs.

Description

Radio resource scheduling method and apparatus in a wireless communication system

The present specification relates to a method and apparatus for scheduling radio resources in a wireless communication system, and more particularly, to a method and apparatus for scheduling radio resources based on a priority determined according to user's rate plan information.

Wireless communication systems are being widely deployed to provide various types of communication services such as voice and data. In general, a wireless communication system is a multiple access system that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of the multiple access system include a Code Division Multiple Access (CDMA) system, a Frequency Division Multiple Access (FDMA) system, a Time Division Multiple Access (TDMA) system, a Space Division Multiple Access (SDMA), or an Orthogonal Frequency Division Multiple Access (OFDMA) system. , SC-FDMA (Single Carrier Frequency Division Multiple Access) system, IDMA (Interleave Division Multiple Access) system, and the like.

An object of the present specification is to implement a radio resource scheduling method and apparatus in a wireless communication system that can minimize the minimum used resources of the lower-order UEs by determining the smallest number of symbols for the lower-order UEs.

The present specification is to implement a radio resource scheduling method and apparatus in a wireless communication system in which the base station allocates at least some resources in each slot to lower-ranking UEs so that contention-based data transmission/reception can be performed only between lower-priority users. The purpose.

This specification implements a radio resource scheduling method and apparatus in a wireless communication system that can provide better data quality compared to unlicensed band-based technology by adding the concept of a subordinated user in a mobile communication business using a licensed band aim to do

A radio resource scheduling method according to an embodiment of the present specification is a radio resource scheduling method by one or more processors of a lower priority user equipment (UE) in a wireless communication system having a higher priority user terminal and a lower priority user terminal, UE performance Transmitting at least one of the messages associated with the to the base station, wherein the transmitted message includes information on the minimum number of symbols for data transmission; checking information on a first RB allocated from a base station through a UE-specific search space (USS); and if the number of symbols occupied by the first RB is greater than or equal to the minimum number of symbols for data transmission, transmitting uplink data to the base station based on contention in relation to other lower-order UEs.

A radio resource scheduling method according to another embodiment of the present specification is a radio resource scheduling method by one or more processors of a base station (BS) in a wireless communication system having a senior user terminal and a lower priority user terminal, one or more subordinate UEs Receiving information on the minimum number of symbols for data transmission from determining a minimum number of symbols for the lower-order UE as the smallest of the received minimum number of symbols, wherein the minimum number of symbols for the lower-order UE is a first number of RBs to be allocated to the lower-order UE; and allocating the first number of RBs to one or more lower-order UEs, and allocating a second number of RBs excluding the first number of RBs to the higher-priority UEs.

The method and apparatus for scheduling radio resources in a wireless communication system according to an embodiment of the present specification can minimize the minimum resources used by the lower-order UEs by determining the smallest number of symbols for the lower-order UEs.

In addition, in the method and apparatus according to an embodiment of the present specification, the base station allocates at least some resources in each slot to lower-priority UEs so that contention-based data transmission/reception is performed only between users of the lower-priority.

In addition, the method and apparatus according to an embodiment of the present specification can provide better data quality compared to the unlicensed band-based technology by adding the concept of a subordinated user in a mobile communication business using a licensed band.

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

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to help the understanding of the present specification, provide embodiments of the present specification, and together with the detailed description, explain the technical features of the present specification.
1 shows an example of the overall system structure of NR to which the method proposed in the present specification can be applied.
2 shows an example of a frame structure in an NR system.
3 shows an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.
4 shows an example of a self-contained structure to which the method proposed in the present specification can be applied.
5 is an exemplary diagram of a wireless communication system to be applied to an embodiment of the present specification.
6 and 7 are flowcharts of a radio resource scheduling method according to an embodiment of the present specification.
8 illustrates a communication system applied to this specification.
9 illustrates a wireless device applicable to this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

In some cases, well-known structures and devices may be omitted or shown in block diagram form focusing on core functions of each structure and device in order to avoid obscuring the concept of the present invention.

In this specification, the base station has a meaning as a terminal node of a network that directly communicates with the terminal. A specific operation described as being performed by the base station in this document may be performed by an upper node of the base station in some cases. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including the base station may be performed by the base station or other network nodes other than the base station. 'Base station (BS: Base Station)' is a fixed station (fixed station), Node B, eNB (evolved-NodeB), BTS (base transceiver system), access point (AP: Access Point), gNB (general NB, generation NB) may be replaced by terms such as In addition, 'terminal' may be fixed or have mobility, and UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS ( Advanced Mobile Station), a wireless terminal (WT), a machine-type communication (MTC) device, a machine-to-machine (M2M) device, a device-to-device (D2D) device, and the like.

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

Specific terms used in the following description are provided to help the 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), NOMA (non-orthogonal multiple access) may be used in various wireless access systems. CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with a radio technology 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 a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like. UTRA is part of the universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in 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 IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. That is, steps or parts not described in order to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in this document may be described by the standard document.

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

With the rapid spread of smartphones and Internet of Things (IoT) terminals, the amount of information exchanged through a communication network is increasing. Accordingly, in the next-generation wireless access technology, an environment (eg, enhanced mobile broadband communication) that provides a faster service to more users than the existing communication system (or the existing radio access technology) )) needs to be considered.

To this end, design of a communication system in consideration of MTC (Machine Type Communication) providing a service by connecting a plurality of devices and objects is being discussed. In addition, the design of a communication system (eg, URLLC (Ultra-Reliable and Low Latency Communication) that considers a service and/or terminal sensitive to communication reliability and/or latency) is being discussed.

Hereinafter, in the present specification, for convenience of description, the next-generation radio access technology is referred to as NR (New RAT, Radio Access Technology), and a wireless communication system to which the NR is applied is referred to as an NR system.

Term Definition

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

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

New RAN: Radio access networks that support NR or E-UTRA or interact with NGC.

network slice: A network slice is a network defined by an operator to provide an optimized solution for a specific market scenario that requires 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 the NG3 reference point between the new RAN and NGC.

Non-standalone NR: A deployment configuration in which a gNB requires an LTE eNB as an anchor for control plane connection to EPC or an eLTE eNB as an anchor for control plane connection to NGC.

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

User Plane Gateway: The endpoint of the NG-U interface.

system general

1 shows an example of the overall system structure of NR to which the method proposed in the present specification can be applied.

Referring to FIG. 1, NG-RAN is composed of gNBs that provide NG-RA user plane (new AS sublayer/PDCP/RLC/MAC/PHY) and 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

Multiple numerologies may be supported in the NR system. Here, the numerology may be defined by subcarrier spacing and cyclic prefix (CP) overhead. In this case, a plurality of subcarrier intervals may be derived by scaling the basic subcarrier interval by an integer N (or μ ). Also, although it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band.

2 shows an example of a frame structure in an NR system. 2 is only for convenience of description, and does not limit the scope of the present invention.

In the case of μ = 2, that is, when the subcarrier spacing (SCS) is 60 kHz, 1 subframe (or frame) may include 4 slots, and 1 subframe shown in FIG. 2 = {1,2,4} slots are an example, and the number of slot(s) that may be included in one subframe may be defined based on a table provided in advance.

A mini-slot may consist of 2, 4, or 7 symbols, and may consist of more or fewer symbols.

In relation to a physical resource 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 an antenna port, an antenna port is defined such that a channel on which a symbol on an antenna port is carried can be inferred from a channel on which another symbol on the same antenna port is carried. When 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 QC/QCL) It can be said that there is a quasi co-location) relationship. Here, the wide range characteristic 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 the present specification can be applied.

서브캐리어들로 구성되고, 하나의 서브프레임이 14·2μ OFDM 심볼들로 구성되는 것을 예시적으로 기술하나, 이에 한정되는 것은 아니다.Referring to FIG. 3 , the resource grid is displayed in the frequency domain.

It is composed of subcarriers and one subframe is exemplarily described as being composed of 14·2 μ OFDM symbols, 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, a transmitted signal is

one or more resource grids composed of subcarriers; and

It is described by the OFDM symbols of From here,

am. remind

denotes the maximum transmission bandwidth, which may vary between uplink and downlink as well as numerologies.

Self-contained structure

A Time Division Duplexing (TDD) structure considered in the NR system is a structure in which both uplink (UL) and downlink (DL) are processed in one slot (or subframe). This is to minimize the latency of data transmission in the TDD system, and the structure may be referred to as a self-contained structure or a self-contained slot.

4 shows an example of a self-contained structure to which the method proposed in the present specification can be applied. 4 is only for convenience of description, and does not limit the scope of the present invention.

Referring to FIG. 4, as in the case of legacy LTE, it is assumed that one transmission unit (eg, a slot, a subframe) consists of 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols.

In FIG. 4 , region 602 denotes a downlink control region, and region 604 denotes an uplink control region. In addition, areas other than the areas 602 and 604 (ie, areas without a separate indication) may be used for transmission of downlink data or uplink data.

That is, uplink control information and downlink control information may be transmitted in one self-contained slot. On the other hand, in the case of data, uplink data or downlink data may be transmitted in one self-contained slot.

When the structure shown in FIG. 4 is used, downlink transmission and uplink transmission are sequentially performed within one self-contained slot, and transmission of downlink data and reception of uplink ACK/NACK may be performed.

As a result, when an error in data transmission occurs, the time required for data retransmission may be reduced. In this way, the delay associated with data transfer can be minimized.

In the self-contained slot structure as shown in FIG. 4, a base station (eNodeB, eNB, gNB) and/or a terminal (user equipment (UE)) converts from a transmission mode to a reception mode Alternatively, a time gap for the process of switching from the reception mode to the transmission mode is required. In relation to the time gap, when uplink transmission is performed after downlink transmission in the self-contained slot, some OFDM symbol(s) may be set as a guard period (GP).

In various embodiments of the present specification, a common search space (CSS) having information broadcasted by a base station and a UE-specific search space checked by the terminal in the symbol of the front part of each slot space, UESS, or USS).

The common search space includes system information to be transmitted to the terminal, and the UE-specified search space includes scheduling information of the corresponding terminal. Here, the scheduling is performed in units of resource blocks (RBs), and the base station may allocate one or more RBs per terminal. When scheduling information is included in the UE-designated search space, the UE may transmit/receive data through the corresponding RB.

CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) is a random access method used in Wi-Fi, and provides a contention window in which two or more terminals wishing to transmit data compete with each other before data transmission. In this case, only a terminal selected in the provided contention window among two or more terminals may perform data transmission.

On the other hand, in the prior art, it was a method in which the base station individually designates data to be transmitted/received to the authenticated terminal. According to the radio resource scheduling method and the apparatus according to an embodiment of the present invention, some RBs are shared by a plurality of user terminals like W-Fi, and radio resources can be used more efficiently.

A radio resource scheduling method and apparatus according to an embodiment of the present specification allocates some resources to lower priority user terminals in each slot, and allows the allocated lower priority user terminals to compete for data transmission and reception.

In the case of the existing unlicensed band communication, since it shares the same band with other technologies, it is difficult to maintain the quality of data. By adding the concept of a new 'subordinated user' to the communication service, it is possible to provide better data quality compared to the unlicensed band-based technology.

Hereinafter, a radio resource scheduling method according to an embodiment of the present specification will be described, and before being described in detail with reference to FIGS. 6 and 7, with reference to FIG. Define terms for 'preferred UE', and 'subordinated UE'.

5 is an exemplary diagram of a wireless communication system to be applied to an embodiment of the present specification.

- Senior users and sub-priority users: Senior users and sub-priority users are classified based on customer information. As an example, the customer information may include a customer code (eg, customer ID) subscribed through a telecommunication company and/or plan information. A senior user refers to a user using an existing 5G (NR) communication plan, and a lower priority user refers to a user using a competitive communication plan. Here, the competitive communication plan refers to a rate plan for use of a wireless communication service in which only terminals selected by competing with each other in a contention window can communicate data.

- Priority UE 10 and Sub-priority UE 20: The senior UE 10 refers to a terminal identified by the rate plan information of the senior user, and the sub-priority UE 20 refers to a terminal identified by the rate plan information of the sub-priority user. Rate plan information is pre-registered in a policy and charging function (PCF) among 5G core devices. The base station 30 may determine the user of the connected UE as either a senior user or a sub-priority user based on the rate plan information stored in the PCF. As an example, the base station 30 may classify the connected UE as either a senior UE 10 or a lower priority UE 20 in response to each UE being connected to the 5G base station 30 .

Here, the radio signal requirements of the priority UE 10 and the lower priority UE 20 are the same. As an example, the maximum transmit power intensity of the higher priority UE 10 and the lower priority UE 20 may be the same.

5 and 6 are flowcharts of a radio resource scheduling method according to an embodiment of the present specification. 5 is a flowchart of a radio resource scheduling method by a lower priority user terminal according to an embodiment of the present specification, and FIG. 6 is a flowchart of a radio resource scheduling method by the base station 30 according to another embodiment of the present specification.

Referring to FIG. 5 , the processor of the lower priority UE 20 , in response to the lower priority UE 20 connecting to the network (eg, 5G NR) (Registration), UE capability (UE Capability) related to at least one of the messages One may be transmitted to the base station 30 (S110).

At least one of the messages related to UE capability may include information on the minimum number of symbols for data transmission. Herein, information on the minimum number of transmitted symbols may be used as a basis for determining the minimum number of symbols for the UE 20 in the lower order in the base station 30 . For example, the base station 30 may receive information on the minimum number of symbols for data transmission from a plurality of connected lower-order UEs 20, respectively, and based on the information on the received minimum number of symbols, the smallest As the minimum number of symbols, the minimum number of symbols for the UE 20 in the lower order may be determined.

In other words, the method according to an embodiment of the present specification is the smallest number of symbols among the minimum number of symbols for each data transmission received from a plurality of lower-order UEs 20. The minimum number of symbols for the lower-order UE 20 is can decide

The processor of the lower-order UE 20 may check information on the first RB allocated to the lower-order UEs 20 through the USS (S120).

As an example, the processor of the lower priority UE 20 may check information on the first RB allocated to the current slot through the USS for the lower priority UE 20 in every slot. Here, the information on the first RB includes information on the number of first RBs in the lower order and/or the contention window in which the lower priority UEs 20 will compete.

The first number of RBs allocated to the lower priority UEs 20 is determined by the base station 30 . As an example, the priority UE 10 may operate in the same manner regardless of the existence of the lower priority UE 20 , but the lower priority UE 20 is based on the number of RBs used by the senior UE 10 in the immediately preceding TTI. Thus, the determined number of first RBs may be allocated. In this case, as the number of RBs used by the prior-priority UEs 10 increases, the number of first RBs to be allocated to the lower-priority UEs 20 may be determined to be smaller.

Among the total number of RBs, the remaining number of second RBs excluding the number of first RBs allocated to the lower-order UEs 20 is allocated for the higher-priority UE 10 .

If the number of symbols occupied by the first RB is smaller than the minimum number of symbols for data transmission based on the information on the first RB, the processor of the lower priority UE 20 may end the operation in the current TTI (S130: YES, S140a).

In addition, if the number of symbols occupied by the first RB is greater than or equal to the minimum number of symbols for data transmission, the processor of the lower-order UE 20 transmits uplink data to the base station 30 based on contention in relation to other lower-order UEs 20 . ) can be transmitted (S130: NO, S140b).

As such, the method according to an embodiment of the present specification can minimize the minimum resource used by the lower-order UEs 20 by determining the minimum number of symbols for the lower-order UEs 20 to be the smallest.

In addition, in the method according to an embodiment of the present specification, the base station 30 allocates at least some resources in each slot to the lower-order UEs 20 so that contention-based data transmission/reception is performed only between the lower-priority users.

In addition, the method according to an embodiment of the present specification can provide better data quality compared to the unlicensed band-based technology by adding the concept of a subordinate user in a mobile communication business using a licensed band.

Referring to FIG. 6 , the base station 30 may receive a message related to UE capability from the lower priority UEs 20 ( S210 ).

The processor of the base station 30 may check the minimum number of symbols for data transmission included in the received messages related to UE performance (S220).

The processor of the base station 30 may compare the checked minimum number of symbols and determine the minimum number of symbols for the next-order UE 20 as the smallest among them (S230).

The processor of the base station 30 may determine the first number of RBs to be allocated to the lower priority UE 20 in the current TTI (S240).

As an example, the base station 30 may determine the first number of RBs to be allocated to the lower priority UEs 20 based on the number of RBs used by the senior UE 10 in the previous TTI. In this case, as the number of RBs used by the prior-priority UEs 10 increases, the number of first RBs to be used by the lower-order UEs 20 may be determined to be smaller. In this case, the number of first RBs is allocated so as not to exceed the maximum number of first RBs for the UE 20 with lower priority.

Thereafter, the determined information on the first RB is transmitted to the lower priority UE 20 through the USS.

The processor of the base station 30 may allocate the remaining number of second RBs excluding the number of first RBs from the total number of RBs in the current TTI for the priority UE 10 (S250).

The processor of the base station 30, the second RB actually used by the senior UE 10 in the current TTI (aka, t-1 TTI) compared to the number of second RBs to be allocated in the subsequent TTI (aka, t-th TTI) It is possible to calculate the ratio of the number (S260).

The processor of the base station 30, based on a ratio of the number of second RBs actually used by the senior UE 10 in the current TTI to the original number of second RBs to be allocated in a later TTI and one or more thresholds provided in advance, A predetermined value for calculating the new number of second RBs to be actually allocated in a subsequent TTI may be calculated (S270).

In an embodiment, the processor of the base station 30 determines that the ratio of the number of second RBs actually used by the senior UE 10 in the current TTI to the original number of second RBs to be allocated in a later TTI is an up-threshold value ( Up-Threshold value), a predetermined value for calculating the new number of second RBs to be allocated to the senior UE 10 in a subsequent TTI may be calculated.

In another embodiment, the processor of the base station 30 determines that the ratio of the number of second RBs actually used by the senior UE 10 in the current TTI to the original number of second RBs to be allocated in a later TTI is a down-threshold value ( Down-Threshold value), a predetermined value for calculating the new number of second RBs to be allocated to the senior UE 10 in a subsequent TTI may be calculated.

In another embodiment, the processor of the base station 30 is configured so that the ratio of the number of second RBs actually used by the senior UE 10 in the current TTI to the original number of second RBs to be allocated in a later TTI is an up-threshold value If smaller and greater than the down-threshold value, a predetermined value for calculating the new number of second RBs to be allocated to the senior UE 10 in a subsequent TTI may be set to zero.

The predetermined value to be increased or decreased in S270a to S270c is determined based on a unique algorithm stored in the memory of the base station 30 . For example, the predetermined value may be calculated to have a larger value as the difference between the ratio of the actually used number of second RBs and the up-threshold value increases. As another example, the predetermined value may be calculated so that the absolute value has a larger value as the difference between the ratio of the actually used number of second RBs and the down-threshold value increases.

The processor of the base station 30 may calculate the new number of first and second RBs to be allocated in a later TTI through Equations 1 and 2 below (S280).

[Equation 1]

RB _sub,t = min {RB _sub,t-1 - RB _diff , RB _sub,cap }

- RB _sub,t : the number of first RBs to be allocated to the UE 20 in the lower priority in the subsequent TTI (t-th TTI)

- RB _{sub, t-1} : the number of first RBs allocated to the lower priority UE 20 in the current TTI (t-1 th TTI)

- RB _diff : predetermined value

- RB _sub,cap : the maximum number of first RBs that can be allocated to the lower priority UE (20) (maximum value of the number of first RBs)

[Equation 2]

- RB _norm,t : the number of second RBs to be allocated to the senior UE 10 in the t-th TTI

- RB _norm,t-1 : the number of second RBs allocated to the senior UE 10 in the t-1 th TTI

- RB _diff : predetermined value

- RB _total : the total number of RBs allocable by the base station 30

- RB _{sub, cap} : the maximum number of first RBs that can be allocated to the lower priority UE (20)

According to Equation 1, the first RB number (new first RB number) of the t-th TTI is the difference between the first RB number and the predetermined value of the t-1 th TTI (the previous first RB number) and the first RB The smaller of the maximum values of the number may be determined.

According to Equation 2, the t-th second number of RBs (the new number of second RBs) is the sum of the t-1 second number of RBs (the previous number of second RBs) and a predetermined value and the base station 30 can allocate It may be determined as the larger of the difference between the maximum number of RBs and the maximum value of the first number of RBs.

Thereafter, the processor of the base station 30 may perform scheduling of radio resources for the senior UE 10 and the lower priority UE 20 based on the newly determined number of first and second RBs ( S290 ).

As such, the method according to an embodiment of the present specification can minimize the minimum resource used by the lower-order UEs 20 by determining the minimum number of symbols for the lower-order UEs 20 to be the smallest.

In addition, in the method according to an embodiment of the present specification, the base station 30 allocates at least some resources in each slot to the lower-order UEs 20 so that contention-based data transmission/reception is performed only between the lower-priority users.

In addition, the method according to an embodiment of the present specification can provide better data quality compared to the unlicensed band-based technology by adding the concept of a subordinate user in a mobile communication business using a licensed band.

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

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

8 illustrates a communication system 1 applied in this specification.

Referring to FIG. 8 , the communication system 1 applied to the present specification includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a radio access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, the wireless device may include a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 . For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like. Home appliances may include a TV, a refrigerator, a washing machine, and the like. The IoT device may include a sensor, a smart meter, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to other wireless devices.

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

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

9 illustrates a wireless device applicable to this specification.

Referring to FIG. 9 , the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {first wireless device 100, second wireless device 200} is {wireless device 100x, base station 200} of FIG. 8 and/or {wireless device 100x, wireless device 100x) } can be matched.

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

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

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

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

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

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

The above-described embodiments of the present specification may be implemented through various means. For example, the embodiments of the present specification may be implemented by hardware, firmware, software, or a combination thereof.

In the case of implementation by hardware, the method according to the embodiments of the present specification may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and 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, the method according to the embodiments of the present specification may be implemented in the form of a module, procedure, or function that performs the functions or operations described above. A computer program in which a software code or the like is recorded may be stored in a computer-readable recording medium or a memory unit and driven by a processor. The memory unit may be located inside or outside the processor, and may transmit and receive data to and from the processor by various known means.

As such, those skilled in the art to which this specification pertains will be able to understand that the present specification may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present specification is indicated by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present specification. .

Claims (14)

A method for a terminal to transmit uplink data in a wireless communication system, the method comprising:
Transmitting, to the base station, capability information of the terminal related to time resource allocation of the uplink data,
receiving, from the base station, resource allocation information for transmission of the uplink data;
To the base station, based on the performance information and the resource allocation information, comprising transmitting the uplink data,
Uplink data transmission method. The method of claim 1,
Transmitting the uplink data,
Based on a result of comparing the size of the information on the first time resources for transmission of the uplink data included in the resource allocation information and the information on the second time resources included in the performance information, the uplink which includes determining whether to transmit link data;
Uplink data transmission method. The method of claim 1,
The information on the first time resource for transmission of the uplink data included in the resource allocation information is determined based on information on the second time resources included in the performance information,
Uplink data transmission method. The method of claim 1,
The resource allocation information is received through a USS (UE-Specific Search Space),
Uplink data transmission method. The method of claim 1,
The resource allocation information includes information on first time resources for transmission of the uplink data and information on a resource block (RB) for transmission of the uplink data,
Uplink data transmission method. A terminal for transmitting uplink data in a wireless communication system, comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation;
The action is:
Transmitting capability information of the terminal related to time resource allocation of the uplink data to a base station through the at least one transceiver,
Receive resource allocation information for transmission of the uplink data from the base station through the at least one transceiver,
To the base station, based on the performance information and the resource allocation information, comprising transmitting the uplink data,
terminal. 7. The method of claim 6,
Transmitting the uplink data,
Based on a result of comparing the size of the information on the first time resources for transmission of the uplink data included in the resource allocation information and the information on the second time resources included in the performance information, the uplink which includes determining whether to transmit link data;
terminal. 7. The method of claim 6,
The information on the first time resource for transmission of the uplink data included in the resource allocation information is determined based on information on the second time resources included in the performance information,
terminal. 7. The method of claim 6,
The resource allocation information is received through a USS (UE-Specific Search Space),
terminal. 7. The method of claim 6,
The resource allocation information includes information on first time resources for transmission of the uplink data and information on a resource block (RB) for transmission of the uplink data,
terminal. An apparatus for transmitting uplink data in a wireless communication system, comprising:
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation;
The action is:
Transmitting, to the base station, capability information of the terminal related to time resource allocation of the uplink data,
receiving, from the base station, resource allocation information for transmission of the uplink data;
To the base station, based on the performance information and the resource allocation information, comprising transmitting the uplink data,
Device. A computer-readable storage medium comprising at least one computer program for causing at least one processor to perform an operation, the operation comprising:
Transmitting, to the base station, capability information of the terminal related to time resource allocation of the uplink data,
receiving, from the base station, resource allocation information for transmission of the uplink data;
To the base station, based on the performance information and the resource allocation information, comprising transmitting the uplink data,
A computer-readable storage medium. A method for a base station to receive uplink data in a wireless communication system, the method comprising:
Receive, from the terminal, capability information of the terminal related to time resource allocation of the uplink data,
Transmitting, to the terminal, resource allocation information for transmission of the uplink data,
From the terminal, based on the performance information and the resource allocation information, comprising receiving the uplink data,
How to receive uplink data. A base station for receiving uplink data in a wireless communication system, comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation,
The operation is:
Receiving, from the terminal through the at least one transceiver, capability information of the terminal related to time resource allocation of the uplink data,
Transmitting resource allocation information for transmission of the uplink data to the terminal through the at least one transceiver,
Receiving the uplink data from the terminal through the at least one transceiver based on the performance information and the resource allocation information,
base station.

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