KR102471619B1 - Method for wireless resource scheduling in wireless communication system - Google Patents

Abstract

The present specification provides a radio resource scheduling method and apparatus in a wireless communication system. Specifically, 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. As, transmitting at least one of the messages related to UE performance to the base station, wherein the transmitted message includes information on the minimum number of symbols for data transmission; Checking information about 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-priority UEs.

Description

Radio resource scheduling method and apparatus in 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 priorities determined according to user rate plan information.

A wireless communication system is 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 capable of supporting 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) system, and 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 capable of minimizing the minimum resource used by the lower priority UEs by determining the minimum number of symbols for the lower priority UEs.

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

The present specification implements a radio resource scheduling method and apparatus in a wireless communication system capable of providing better data quality than unlicensed band-based technology by adding the concept of a lower-priority user in a mobile communication business using a licensed band. aims 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 equipment and a lower priority user equipment, and the UE performance Transmitting at least one of the messages related to to the base station, wherein the transmitted message includes information on the minimum number of symbols for data transmission; Checking information about 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-priority 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 higher priority user terminal and a lower priority user terminal, wherein one or more lower priority UEs Receiving information about the minimum number of symbols for data transmission from; determining the minimum number of symbols for a lower-priority UE as the smallest of the minimum number of symbols received, wherein the minimum number of symbols for the lower-priority UE is the number of first RBs to be allocated to the latter; and allocating the first number of RBs to one or more lower-priority UEs and allocating a second number of RBs excluding the first number of RBs to the higher-priority UEs.

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

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

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

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 skilled in the art from the description below. .

The accompanying drawings, which are included as part of the detailed description to aid understanding of the present specification, provide examples of the present specification and describe technical features of the present specification together with the detailed description.
1 shows an example of the overall system structure of NR to which the method proposed in this specification can be applied.
2 shows an example of a frame structure in the NR system.
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 an example of a self-contained structure to which the method proposed in this 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. The detailed description set forth below in conjunction with the accompanying 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 for the purpose of providing a thorough understanding of the present invention. However, one skilled in the art recognizes that the present invention may be practiced without these specific details.

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

In this specification, a base station has a meaning as a terminal node of a network that directly communicates with a terminal. A specific operation described as being performed by a 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 a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. A 'base station (BS)' is a fixed station, Node B, evolved-NodeB (eNB), base transceiver system (BTS), access point (AP), general NB (gNB, generation NB) may be replaced by terms such as In addition, a 'terminal' may be fixed or mobile, and may include user equipment (UE), mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), and AMS ( Advanced Mobile Station), wireless terminal (WT), machine-type communication (MTC) device, machine-to-machine (M2M) device, device-to-device (D2D) device, and the like.

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 downlink, a transmitter may be part of a base station and a receiver may be part of a terminal. In uplink, a transmitter may be a part of a terminal and a receiver may be a part of a base station.

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

The following technologies are CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), NOMA It can be used in various wireless access systems such as (non-orthogonal multiple access). 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 radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA). 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) that uses E-UTRA and adopts 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 to clearly reveal the technical idea 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 can be explained 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.

As the spread of smart phones and Internet Of Things (IoT) terminals is rapidly spreading, the amount of information exchanged through a communication network is increasing. Accordingly, in the next-generation radio access technology, an environment that provides faster service to more users than the existing communication system (or existing radio access technology) (e.g., enhanced mobile broadband communication) )) needs to be considered.

To this end, a design of a communication system considering Machine Type Communication (MTC), which provides a service by connecting a plurality of devices and objects, is being discussed. In addition, the design of a communication system (e.g., URLLC (Ultra-Reliable and Low Latency Communication)) considering services and/or terminals that are sensitive to communication reliability and/or latency are being discussed

Hereinafter, for convenience of description, the next-generation radio access technology is referred to as 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: eLTE eNB is an evolution of eNB that supports connectivity to EPC and NGC.

gNB: A node that supports NR as well as connectivity 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 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 that has a well-defined external interface and well-defined functional behavior.

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

NG-U: User plane interface used for NG3 reference point between 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: A deployment configuration in which the eLTE eNB requires the gNB as an anchor for control plane connectivity to the 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 this specification can be applied.

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

The gNBs are interconnected through an Xn interface.

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

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

NR (New Rat) numerology and frame structure

A number of numerologies can be supported in the NR system. Here, the numerology may be defined by subcarrier spacing and CP (Cyclic Prefix) overhead. In this case, the multiple subcarrier spacing can be derived by scaling the basic subcarrier spacing 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 the NR system. Figure 2 is only for convenience of description and does not limit the scope of the present invention.

As an example when 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 = As an example, {1,2,4} slots, the number of slot(s) that can 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, or may consist of more or fewer symbols.

Regarding 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 a symbol on the antenna port is carried can be inferred from the channel on which other symbols on the same antenna port are carried. If the large-scale properties of the channel on which the symbols on one antenna port are carried can be inferred from the channel on which the symbols on the other antenna port are carried, then the two antenna ports are quasi co-located or QC/QCL (quasi co-located or quasi co-location). 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 this specification can be applied.

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

It is composed of subcarriers, and one subframe is composed of 14·2μ OFDM 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 composed of subcarriers and

It is described by the OFDM symbols of From here,

to be. remind

represents 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 that processes both Uplink (UL) and Downlink (DL) in one slot (or subframe). This is to minimize latency of data transmission in a 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 this specification can be applied. Figure 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, slot, subframe) is composed 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 areas 602 and 604 (ie, areas not separately indicated) may be used for transmission of downlink data or uplink data.

That is, uplink control information and downlink control information can 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 using the structure shown in FIG. 4, downlink transmission and uplink transmission proceed sequentially within one self-contained slot, and transmission of downlink data and reception of uplink ACK/NACK may be performed.

As a result, when a data transmission error occurs, the time required for data retransmission may be reduced. Through this, delay associated with data delivery can be minimized.

In the self-contained slot structure as shown in FIG. 4, a process of switching a base station (eNodeB, eNB, gNB) and/or a terminal (UE (User Equipment)) from a transmission mode to a reception mode Alternatively, a time gap for a process of switching from a reception mode to a transmission mode is required. Regarding 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 broadcast by a base station in a symbol at the front of each slot and a UE-specific search space (UE-specific search space) checked by a terminal, respectively. 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, scheduling is performed in units of resource blocks (RBs), and the base station may allocate one or more RBs per UE. When scheduling information is included in the UE-specified search space, the UE may transmit and 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 desiring data transmission compete with each other before data transmission. At this time, only the terminal selected from 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 a base station designates data to be individually transmitted and received to an authenticated terminal. According to the radio resource scheduling method and apparatus according to an embodiment of the present invention, a plurality of user terminals can share some RBs like W-Fi and use radio resources 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 existing unlicensed band communication, since it shares the same band as other technologies, it is difficult to maintain data quality. However, a radio resource scheduling method and apparatus according to an embodiment of the present specification By adding a new concept of 'lower-priority user' to the communication service, better data quality can be provided compared to technology based on unlicensed bands.

Hereinafter, a radio resource scheduling method according to an embodiment of the present specification will be described, and prior to a detailed description with reference to FIGS. 6 and 7, referring to FIG. Terms for 'priority UE' and 'subordinate UE' are defined.

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

- Priority users and subordinate users: Priority users and subordinate users are classified based on customer information. For example, customer information may include a customer code (eg, customer ID) subscribed through a telecommunications company and/or rate plan information. Priority users refer to users using existing 5G (NR) communication plans, and subordinate users refer to users using competitive communication plans. Here, the competitive communication rate plan refers to a rate plan for using a wireless communication service in which only selected terminals compete with each other in a competition window for data communication.

- Priority UE 10 and Subordinate UE 20: The senior UE 10 refers to a terminal identified by the rate plan information of the senior user, and the junior UE 20 refers to a terminal identified by the rate plan information of the subordinate user. Rate plan information is pre-registered in PCF (policy and charging function) among 5G core equipment. The base station 30 may determine the user of the connected UE as either a higher-priority user or a lower-priority user based on the rate plan information stored in the PCF. For example, the base station 30 may classify the connected UE as either a higher priority 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 higher priority UE 10 and the lower priority UE 20 are the same. For example, the maximum transmit power of the higher priority UE 10 and the lower priority UE 20 may be equal to each other.

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 transmits at least among messages related to UE capability in response to the lower priority UE 20 accessing a network (eg, 5G NR) (Registration). 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. Here, the 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 at the base station 30 . For example, the base station 30 may receive information on the minimum number of symbols for data transmission from each of the plurality of connected lower-priority UEs 20, and based on the received information on the minimum number of symbols, the smallest number of symbols may be received. The minimum number of symbols may determine the minimum number of symbols for the subsequent UE 20.

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

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

For 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 second-order first RBs and/or a contention window in which the second-order UEs 20 compete.

The number of first RBs allocated to the lower priority UEs 20 is determined by the base station 30 . For example, the higher priority UE 10 may operate the same regardless of whether the lower priority UE 20 exists, but the lower priority UE 20 operates based on the number of RBs used by the higher priority UE 10 in the previous TTI. Thus, the determined number of first RBs may be allocated. In this case, as the number of RBs used by the higher priority UEs 10 increases, the number of first RBs to be allocated to the lower priority UEs 20 may decrease.

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

If the number of symbols occupied by the first RB is less 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 terminate 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 priority UE 20 transmits uplink data to the base station 30 based on contention in relation to other lower priority UEs 20. ) (S130: NO, S140b).

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

In addition, in the method according to an embodiment of the present specification, the base station 30 allocates at least some resources to the lower priority UEs 20 in each slot so that contention-based data transmission and 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 than unlicensed band-based technology by adding the concept of a lower-priority user in a mobile communication business using a licensed band.

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

The processor of the base station 30 may check the minimum number of symbols for data transmission included in each of the messages related to the received 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 subsequent UE 20 with the smallest of them (S230).

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

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

Subsequently, information on the determined 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 among the total number of RBs in the current TTI to the priority UE 10 (S250).

The processor of the base station 30 calculates the second RB actually used by the prior UE 10 in the current TTI (aka, t-1 th TTI) compared to the number of second RBs to be allocated in a later TTI (aka, t-th TTI) The ratio of numbers can be calculated (S260).

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

In one embodiment, the processor of the base station 30 determines that the ratio of the number of second RBs actually used by the priority UE 10 in the current TTI to the original number of second RBs to be allocated in the next TTI is an up-threshold value ( Up-Threshold value), a predetermined value for calculating the number of new second RBs to be allocated to the priority 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 priority UE 10 in the current TTI to the original number of second RBs to be allocated in the next TTI is a down-threshold value ( Down-Threshold value), a predetermined value for calculating the number of new second RBs to be allocated to the priority 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 priority UE 10 in the current TTI to the original number of second RBs to be allocated in the next TTI is an up-threshold value. If it is less than and greater than the down-threshold value, a predetermined value for calculating the number of new second RBs to be allocated to the priority UE 10 in the next TTI may be set to 0.

The predetermined value 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 number of second RBs actually used and the up-threshold value increases. As another example, the predetermined value may be calculated to have a larger absolute value as the difference between the ratio of the number of second RBs actually used and the down-threshold value increases.

The processor of the base station 30 may calculate the number of new first and second RBs to be allocated in a subsequent 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 : number of first RBs to be allocated to the lower priority UE 20 in the subsequent TTI (t-th TTI)

- RB _sub,t-1 : 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 : maximum number of first RBs allocable to the lower priority UE 20 (maximum value of the number of first RBs)

[Equation 2]

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

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

- RB _diff : predetermined value

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

- RB _sub,cap : maximum number of first RBs allocable to the lower priority UE 20

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

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

Thereafter, the processor of the base station 30 may perform scheduling of radio resources for the higher priority 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 may minimize the minimum used resource of the lower priority UEs 20 by determining the smallest number of symbols for the lower priority UEs 20 .

In addition, in the method according to an embodiment of the present specification, the base station 30 allocates at least some resources to the lower priority UEs 20 in each slot so that contention-based data transmission and 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 than unlicensed band-based technology by adding the concept of a lower-priority user in a mobile communication business using a licensed band.

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

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

8 illustrates a communication system 1 applied to this specification.

Referring to FIG. 8 , a communication system 1 applied to the present specification includes a wireless device, a base station, and a network. Here, the wireless device means a device that performs communication using a radio access technology (eg, 5G New RAT (NR), Long Term Evolution (LTE)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, wireless devices include robots 100a, vehicles 100b-1 and 100b-2, XR (eXtended Reality) devices 100c, hand-held devices 100d, and home appliances 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 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 Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices, Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) installed in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like. A portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), a computer (eg, a laptop computer, etc.), and the like. Home appliances may include a TV, a refrigerator, a washing machine, and the like. IoT devices may include sensors, smart meters, and the like. For example, a base station and a network may also be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200 . 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 (eg, sidelink communication) without going through the base station/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication). In addition, IoT devices (eg, sensors) may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

Wireless communication/connection 150a, 150b may be performed between the wireless devices 100a to 100f/base station 200-base station 200/wireless devices 100a to 100f. Here, wireless communication/connection may be performed through various radio 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 radio signals to each other. For example, the wireless communication/connection 150a and 150b may transmit/receive signals through various physical channels based on all/partial processes of FIG. To this end, based on the various proposals of this specification, various configuration information setting processes for transmitting / receiving radio signals, 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 and receive radio signals through various radio access technologies (eg, LTE, NR). Here, {the first wireless device 100, the second wireless device 200} is the {wireless device 100x, the base station 200} of FIG. 8 and/or the {wireless device 100x, the wireless device 100x. } can correspond.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108. The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the functions, procedures and/or methods described/suggested above. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106. In addition, the processor 102 may receive a 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, memory 104 may perform some or all of the processes controlled by processor 102, or store software code including instructions for performing procedures and/or methods described/suggested above. . Here, the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement 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 mean a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208. The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the functions, procedures and/or methods described/suggested above. For example, the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206. In addition, the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 . The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 . For example, memory 204 may perform some or all of the processes controlled by processor 202, or may store software code including instructions for performing procedures and/or methods described/suggested above. . Here, the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement 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 mean a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited to this, 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). One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to functions, procedures, proposals and/or methods disclosed herein. One or more processors 102, 202 may generate messages, control information, data or information according to functions, procedures, suggestions and/or methods disclosed herein. One or more processors 102, 202 generate PDUs, SDUs, messages, control information, data or signals (e.g., baseband signals) containing information according to the functions, procedures, proposals and/or methods disclosed herein , can be provided 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 generate PDUs, SDUs according to functions, procedures, proposals and/or methods disclosed herein. , messages, control information, data or information can be obtained.

One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. 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 and 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, suggestions and/or methods disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) and may be stored in one or more processors (102, 202). 202). The functions, procedures, suggestions and/or methods disclosed herein may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.

One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or more memories 104, 204 may 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 internally 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., as referred to in the methods and/or operational flow charts herein, to one or more other devices. One or more of the transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed herein from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and 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 radio signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and one or more transceivers 106, 206, via one or more antennas 108, 208 may perform functions, procedures disclosed herein. , It can be set to transmit and receive user data, control information, radio signals / channels, etc. mentioned in proposals, methods, and / or operational flowcharts. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or more transceivers (106, 206) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using 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, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the 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, 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 includes one or more ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices) , Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

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 software codes and the like are 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 exchange data with the processor by various means known in the art.

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 its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present specification is indicated by the claims to be described later 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)

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

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