KR102371940B1 - Method and apparatus for a uplink transmission based on a characteristics of physical resources - Google Patents

Abstract

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data rate after a 4G communication system such as LTE.
According to an embodiment of the present invention, in a method of a terminal in a wireless communication system, receiving mapping information between a logical channel and profile information of an uplink grant from a base station, receiving an uplink grant from the base station, and the receiving and transmitting data to the base station based on the mapping information and the profile information of the uplink grant.

Description

Uplink transmission method considering the characteristics of physical resources {METHOD AND APPARATUS FOR A UPLINK TRANSMISSION BASED ON A CHARACTERISTICS OF PHYSICAL RESOURCES}

The present invention relates to a wireless communication system, and to a multiplexing method and apparatus for effectively performing uplink (UL) transmission when a terminal is using a plurality of services.

More specifically, in the present invention, uplink with specific physical characteristics (numerology, length of transmission time interval (TTI), modulation and coding scheme (MCS) or power control command)) When a link grant (UL grant) is allocated to the UE, the UE determines which service or logical channel data is to be transmitted on, forms a packet to be actually transmitted, and then transmits the operation.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a 4G network after (Beyond 4G Network) communication system or an LTE system after (Post LTE) system.

In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band). In order to alleviate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, in the 5G communication system, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, for network improvement of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud radio access network: cloud RAN), an ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development is underway.

In addition, in the 5G system, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technologies such as Filter Bank Multi Carrier (FBMC), NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

Meanwhile, the terminal may be allocated an uplink resource from the base station and transmit data through the uplink resource. However, when the terminal is using a service having different requirements, it is not determined for which service to transmit data. Accordingly, there is a need for a method for a terminal using a plurality of services to determine which service data is to be transmitted through the uplink resource.

When the terminal is using a plurality of services requiring different qualities and is allocated a UL resource having a specific physical characteristic from the base station, it must be determined which service or data belonging to a logical channel is transmitted through the allocated UL resource. In the present invention, the operation of the terminal and the base station for such determination is proposed.

The method of the terminal of the present invention for solving the above problems, receives mapping information between a logical channel and profile information of an uplink grant from a base station, receives an uplink grant from the base station, and receives the received uplink and transmitting data to the base station based on the grant's profile information and the mapping information.

In addition, the method of the base station of the present invention for solving the above problems includes transmitting mapping information between a logical channel and profile information of an uplink grant to a terminal, transmitting an uplink grant to the terminal, and receiving selected data based on the uplink grant profile information and the mapping information.

In addition, the terminal of the present invention for solving the above problems receives the mapping information between the logical channel and profile information of the uplink grant from the base station and the transceiver for transmitting and receiving signals, and receives the uplink grant from the base station, , a control unit for transmitting data to the base station based on the received profile information of the uplink grant and the mapping information.

In addition, the base station of the present invention for solving the above problems transmits mapping information between the logical channel and profile information of the uplink grant to the transceiver and the terminal for transmitting and receiving signals, and transmits the uplink grant to the terminal, , a control unit configured to receive data selected based on the profile information of the uplink grant and the mapping information.

According to an embodiment of the present invention, when a UL resource having a specific physical characteristic is allocated to a terminal using a plurality of services, the terminal selects the most appropriate service or data belonging to a logical channel, forms a packet to be actually transmitted, and then transmits it can be performed. This can more effectively satisfy the requirements or quality of the service being used by the terminal.

1 is a diagram illustrating an example of an LCP-based UL resource utilization method.
2A is a diagram illustrating an example of a situation in which different MCSs are assigned UL grants when a base station receives specific CQI feedback from a terminal according to an embodiment of the present invention.
2B is a diagram illustrating an operation of a terminal according to an embodiment of the present invention.
2C is a diagram illustrating an operation of a base station according to an embodiment of the present invention.
3A is a diagram illustrating an example of a situation in which a base station allocates a UL grant in which different TPC commands are specified when a specific CQI and PHR are fed back from a terminal according to an embodiment of the present invention.
3B is a diagram illustrating an operation of a terminal according to an embodiment of the present invention.
3C is a diagram illustrating an operation of a base station according to an embodiment of the present invention.
4 is a diagram illustrating a method of directly informing a profile ID when a base station allocates a UL grant to a terminal according to an embodiment of the present invention.
5 is a profile in which the base station according to an embodiment of the present invention does not directly inform the profile ID when allocating the UL grant to the terminal, but shows the parameters directly or indirectly identified by the terminal through the UL grant or other signaling in a predefined profile. It is a diagram showing a method of deriving a profile ID by comparing the corresponding relationship between ID and parameter.
6 is a diagram illustrating an amount of data belonging to each LCH and Bj of each LCH j according to an embodiment of the present invention.
7 is a diagram illustrating two types of UL grants allocated to a terminal by a base station and a correspondence relationship between a UL grant and an LCH according to an embodiment of the present invention.
8 is a diagram illustrating an example of processing UL grant X first and then processing UL grant Y according to an embodiment of the present invention.
9 is a diagram illustrating an example of processing UL grant Y first and then processing UL grant X according to an embodiment of the present invention.
11 is a diagram illustrating a HARQ time relationship according to an embodiment of the present invention.
12 is a diagram illustrating a time between various UL grant reception times and data transmission times according to an embodiment of the present invention.
13 is a diagram illustrating a time between various UL grant reception times and ACK/NACK reception times according to an embodiment of the present invention.
14 is a diagram illustrating a time between various data transmission times and ACK/NACK reception times according to an embodiment of the present invention.
15 is a diagram illustrating a UL grant allocated to various TTI types and a UL transmission time according to the UL grant according to an embodiment of the present invention.
16 is a diagram illustrating a case of allocating UL resources having different TTIs through a UL grant transmitted through a specific TTI according to an embodiment of the present invention.
17 is a diagram illustrating a case of allocating UL resources having a plurality of different TTIs through a PDCCH transmitted in one TTI according to an embodiment of the present invention.
18 is a diagram illustrating an example in which a plurality of bandwidth parts operate resources configured with different TTIs in one component carrier according to an embodiment of the present invention.
19A to 19C are diagrams illustrating examples of allocating UL resources having different types of TTI lengths at different PDCCH monitoring time points according to an embodiment of the present invention.
20 is a diagram illustrating an example in which UL resources having different types of TTI lengths are allocated in different PDCCH monitoring time and frequency resources according to an embodiment of the present invention.
21 is a diagram illustrating another example in which UL resources having different types of TTI lengths are allocated in different PDCCH monitoring time and frequency resources according to an embodiment of the present invention.
22 is a diagram illustrating an example in which different PDCCH monitoring time and frequency resources are set in different bandwidth parts according to an embodiment of the present invention.
23 is a diagram for explaining a method for a terminal to identify a physical characteristic of a UL grant after receiving a UL grant and then select an LCH that can be transmitted through an allocated UL grant according to an embodiment of the present invention.
24 is a diagram for explaining a method for a terminal to select an LCH that can be transmitted through a UL grant after receiving a UL grant according to an embodiment of the present invention.
25 is a diagram illustrating a method for transmitting uplink data according to an embodiment of the present invention.
26 is a diagram illustrating another method of transmitting uplink data according to an embodiment of the present invention.
27 is a diagram illustrating another method for transmitting uplink data according to an embodiment of the present invention.
28 is a diagram illustrating another method for transmitting uplink data according to an embodiment of the present invention.
29 is a diagram illustrating the structure of a terminal according to an embodiment of the present invention.
30 is a diagram illustrating a structure of a base station according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. And, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

The present invention proposes a logical channel prioritization (LCP) operation for UL transmission of a terminal in a mobile communication system.

Various services (or slices) such as enhanced Mobile BroadBand (eMBB), Ultra Reliable and Low Latency Communication (URLLC), and enhanced Machine Type Communication (eMTC) are expected to be supported in the 5G mobile communication system. This can be understood in the same context that the 4G mobile communication system, LTE, supports voice-specific services such as VoIP (Voice over Internet Protocol) and BE (Best Effort) services. In addition, it is expected that various numerologies will be supported in the 5G mobile communication system. This specifically means subcarrier spacing and the like.

In addition, it is expected that TTI of various lengths will be supported in the 5G mobile communication system. This can be seen as one of the characteristics of the 5G mobile communication system, which is very different from the support of only one type of TTI (1 ms) in LTE standardized so far. If the 5G mobile communication system supports a much shorter TTI (eg 0.1 ms) than the 1 ms TTI of LTE, it is expected to be of great help in supporting URLLC that requires a short delay time.

The present invention proposes an uplink scheduling (UL scheduling) method considering the characteristics of such a 5G mobile communication system, that is, various services, various numerology, and TTI support. The difference from the UL scheduling method defined in LTE is that, in the past, a scheduling method for supporting various services is provided, but in the present invention, a scheduling method for supporting various services using various numerology or TTI is provided.

An LCP method for explaining the present invention will be described. In the present invention, Logical Channel Prioritization (LCP) among UL scheduling will be described.

In the case of downlink scheduling (DL scheduling), the subject that generates and transmits downlink traffic is the base station, and the subject that performs DL scheduling is also the base station. That is, the base station may perform DL scheduling and transmit the generated DL traffic. However, in the case of UL scheduling, the subject that generates and transmits UL traffic is the UE, but the subject that performs UL scheduling is the base station. Accordingly, the base station allocates a resource of a certain size to the terminal through UL scheduling, and the terminal allocates the UL traffic it generates to the resource and transmits it to the base station. Here, the method of "allocating the UL traffic generated by the terminal to the allocated resource" is referred to as LCP. Specifically, the process may refer to a process in which the terminal determines the type and size of traffic to be transmitted to the allocated resource. An example of this is shown in FIG. 1 .

1 is a diagram illustrating an example of an LCP-based UL resource utilization method.

UL traffic generated by the terminal corresponds to a logical channel according to a service type and the like. As an example, each logical channel or a group of multiple logical channels may correspond to each service. And each logical channel has priority according to the configuration of the base station.

Referring to FIG. 1, logical channels 1, 2, and 3 have priorities 1, 2, and 3, respectively. A method of allocating UL traffic to a corresponding resource when the UE receives a resource from the base station is as follows.

The UE basically allocates data as much as PBR (Prioritized Bit Rate) in the order of logical channels with high priority. Here, the PBR of each logical channel is set by the base station through RRC signaling.

Next, the UE repeatedly allocates the remaining UL traffic in the order of the logical channels with high priority until all allocated resources are exhausted. Through this, UL traffic belonging to several logical channels can be multiplexed.

Accordingly, the first embodiment proposed by the present invention is as follows.

In LTE, when the base station allocates resources to the terminal through the UL grant, MCS information is also notified. This information is essential when the UE generates a physical layer packet (PHY packet) through modulation and coding operations. However, the UE only performs an operation of generating a PHY packet for the data already given based on such MCS information, and does not determine which service, ie, data belonging to which LCH, is transmitted through the allocated UL grant. In the first embodiment of the present invention, a method of determining whether the terminal will transmit data belonging to a certain LCH through the UL grant through MCS information is proposed.

2A is a diagram illustrating an example of a situation in which different MCSs are assigned UL grants when a base station receives a specific CQI feedback from a terminal according to an embodiment of the present invention.

The UE may feedback the CQI in step S210. It is assumed that the terminal feeds back CQI corresponding to MCS level 10 to the base station during CQI feedback.

At this time, the following cases may be considered.

- Case A: The base station may instruct the terminal to use MCS level 10 when allocating the UL grant to the terminal in step S220 based on the CQI feedback information of the terminal.

- Case B (case B): The base station may instruct the terminal to use MCS level 5 when allocating the UL grant to the terminal in step S240 based on the CQI feedback information of the terminal.

In general, when a channel gain between the base station and the terminal is given, the terminal feeds back to the base station the highest CQI among CQIs that can satisfy a previously given target error rate.

Therefore, in case A, the UE receives the UL grant specified to use MCS level 10 (S220) and performs transmission based on the UL grant (S230) while satisfying the given target error rate and the highest throughput can be obtained The base station may determine that the MCS level is set to 10 in order to obtain the highest throughput while satisfying the target error rate.

Next, as in case B described above, when the UE receives the UL grant specified to use MCS level 5 (S240) and performs transmission based on the UL grant (S250), it is higher than the given target error rate. A lower throughput than case A can be obtained while satisfying a low error rate. This is because, when the channel gain between the base station and the terminal is given, a trade-off relationship is established between the error rate and the throughput.

Therefore, even though the UE has fed back the CQI corresponding to MCS level 10, the fact that the eNB has allocated the specified UL grant to use MCS level 5 to the UE indicates that the UE intends to transmit data requiring a low error rate. there is. Alternatively, the base station may have intended to satisfy a given target error rate due to a decrease in channel gain when the base station allocates a UL grant to use MCS level 5 to the terminal.

However, the UE cannot distinguish between case A and case B as described above. That is, when the terminal feedbacks the CQI corresponding to MCS level 10 and receives a UL grant specified to use MCS level 5 from the base station, (a) the base station observes or predicts a decrease in channel gain to satisfy the given target error rate and Now, whether the MCS level is inevitably lowered from 10 to 5 or (b) the target error rate can be satisfied even using MCS level 10, but to satisfy the lower target error rate, the MCS level is intentionally lowered from 10 to 5 I don't know if it was

It is assumed that both eMBB traffic requiring high throughput and URLLC traffic requiring high reliability or low error rate exist in the buffer of the terminal. The UE may transmit eMBB traffic or URLLC traffic to the TTI allocated based on the TTI length and subcarrier spacing value. At this time, if the UE can determine the MCS configuration intention of the above-described base station, data may be transmitted by additionally considering the MCS configuration intention in the length of the TTI or the subcarrier spacing value. Specifically, the terminal may perform the following operation.

- When the base station allocates a UL grant with a specified MCS level lower than the CQI feedback of the terminal, if a UL grant including a low MCS level is allocated for a lower target error rate, the terminal is present in the buffer through the allocated UL grant. Transmits URLLC traffic that requires high reliability or low error rate among traffic.

- On the other hand, if the base station allocates a UL grant with a specified MCS level similar to the CQI feedback of the terminal, and the UL grant is allocated for high throughput, the terminal requires high throughput among the traffic existing in the buffer through the allocated UL grant. Sends eMBB traffic.

In this way, if the terminal can determine the MCS configuration intention of the base station, when the terminal is allocated a UL grant, it can determine which LCH data is to be transmitted through this. That is, the UE can obtain the effect of improving the service quality by allocating data by selecting the LCH most suitable for the characteristics of the allocated UL grant.

To this end, the present invention proposes a method of adding a 1-bit indicator indicating an MCS configuration intention when the base station allocates a UL grant to the terminal. In the present invention, the 1-bit indicator is called conservative MCS. However, the embodiment of the present invention is not limited thereto, and other terms meaning the MCS setting intention may be used. An example of this is as follows.

- When Conservative MCS = 1, it may mean that the UL grant and MCS allocated by the base station are for traffic transmission requiring a low error rate.

- When Conservative MCS = 0, it may mean that the UL grant and MCS allocated by the base station are for traffic transmission requiring high throughput.

- Table 1 below shows an example in which 1 bit of the conservative MCS item is added to the UL grant of LTE.

[Table 1]

In more detail, the operation of the terminal will be described with reference to FIG. 2B. 2B is a diagram illustrating an operation of a terminal according to an embodiment of the present invention.

(1) The terminal may receive the LCH list in step S260. The UE may receive the LCH list corresponding to conservative MCS = 1 and conservative MCS = 0 from the base station. The UE may receive an LCH list corresponding to each conservative MCS through an RRC IE such as LogicalChannelConfig IE.

(2) The UE may receive a UL grant in step S261. After receiving the UL grant, the UE checks the conservative MCS item in the UL grant.

A. When Conservative MCS = 1, the UE selects the LCH corresponding to conservative MCS = 1 according to the correspondence between the conservative MCS and LCH provided by the base station and performs LCP operation on the selected LCH.

B. If Conservative MCS = 0, the UE selects the LCH corresponding to conservative MCS = 0 according to the correspondence between the conservative MCS and LCH provided by the base station and performs LCP operation on the selected LCH.

(3) And, after performing the LCP operation in step S262, the UE performs UL transmission.

2C is a diagram illustrating an operation of a base station according to an embodiment of the present invention.

(1) The base station may provide the terminal with an LCH list corresponding to conservative MCS = 1 and conservative MCS = 0 in step S270. The base station may provide the LCH list corresponding to each conservative MCS to the terminal through an RRC IE such as LogicalChannelConfig IE.

(2) The base station may transmit a UL grant in step S271. The base station may include a conservative MCS item in the UL grant, and the terminal checks the conservative MCS item in the UL grant.

(3) Then, the base station may receive uplink data from the terminal in step S272. In this case, the uplink data may be data related to the LCH corresponding to the conservative MCS. Specific details are the same as described above, and will be omitted below.

The second embodiment proposed by the present invention is as follows.

In LTE, when the base station allocates resources to the terminal through the UL grant, TPC information is also notified. This information is absolutely necessary for the UE to determine transmission power when performing UL transmission. However, the UE generates a PHY packet for data already given based on such TPC information, and then decides how much transmission power to transmit it, and which service, ie, data belonging to which LCH, is transmitted through the allocated UL grant. does not decide whether In the second embodiment of the present invention, a method for determining whether the terminal will transmit data belonging to which LCH through the UL grant through TPC information is proposed.

3A is a diagram illustrating an example of a situation in which a base station allocates a UL grant in which different TPC commands are specified when a specific CQI and PHR are fed back from a terminal according to an embodiment of the present invention.

The terminal performs CQI feedback and PHR reporting in step S310 to provide the base station with information on a channel gain between the current base station and the terminal and transmit power available to the terminal. In this embodiment, the terminal may set the TPC command setting to +1 dB.

At this time, the following cases may be considered.

-Case A: The base station increases the transmission power of the terminal by 1 dB compared to the previous transmission through the TPC command setting when allocating the UL grant to the terminal in step S320 based on the CQI feedback and PHR reporting information of the terminal (TCP) command (+1dB)).

-Case B (case B): The base station increases the transmission power of the terminal by 4 dB compared to the previous transmission through the TPC command setting when allocating the UL grant to the terminal in step S340 based on the CQI feedback and PHR reporting information of the terminal (TCP) command (+5dB)).

In general, the base station sets the TPC command so that the strength of the UL signal received by the base station becomes the target signal strength when the channel gain between the base station and the terminal is given.

For example, during previous transmission, if the base station received the terminal's UL signal with the target signal strength, and the current channel gain decreased by 1 dB compared to the previous transmission, the base station instructs the terminal to increase the transmission power by 1 dB compared to the previous transmission to overcome this. instruct

Therefore, in case A described above, since the UE was instructed to increase the transmission power by 1 dB compared to the previous transmission through the TPC command in the UL grant, the UE can determine that the eNB observed or predicted a decrease in the channel gain by 1 dB.

Similarly, in case B described above, since the UE was instructed to increase the transmission power by 4 dB compared to the previous transmission through the TPC command in the UL grant, the UE can determine that the eNB observed or predicted a decrease in the 4 dB channel gain.

However, the following situations can also be considered. As described above in case B, the base station instructs the terminal to increase the transmission power of the terminal by 4 dB compared to the previous transmission through the TPC command setting when allocating the UL grant to the terminal. In fact, the channel gain between the base station and the terminal is reduced by only 1 dB. The reason the base station instructed to increase the transmission power of the terminal by 4 dB through the TPC command setting may be to increase the target signal strength by 3 dB to receive the UL signal of the terminal more stably, that is, with a lower error rate. .

However, the UE cannot grasp the intention of the base station described above only with the TPC information included in the UL grant. That is, when the base station instructs the terminal to increase the transmission power compared to the previous transmission, the purpose is (a) to compensate for the decrease in channel gain under the same target signal strength, or (b) to increase the target signal strength. I don't know if

As above, it is assumed that both URLLC traffic requiring high reliability or low error rate and other general eMBB traffic exist in the buffer of the terminal. The UE may transmit eMBB traffic or URLLC traffic to the TTI allocated based on the TTI length and subcarrier spacing value. At this time, if the UE can determine the TPC command setting intention of the above-described base station, data may be transmitted by additionally considering the TPC command setting intention to the length of the TTI or the subcarrier spacing value. Specifically, the terminal may perform the following operation.

- When the terminal receives the UL grant from the base station after reporting the channel gain and available transmission power between the base station and the terminal, if the UL grant is allocated to achieve a lower target error rate by increasing the target signal strength , the UE transmits URLLC traffic requiring high reliability or low error rate among traffic existing in the buffer through the allocated UL grant.

- On the other hand, when the terminal receives the UL grant from the base station after reporting the channel gain and available transmission power between the base station and the terminal, the UL grant is allocated to achieve a lower target error rate by increasing the target signal strength. If this is not the case, the UE transmits general eMBB traffic, not URLLC traffic, among the traffic existing in the buffer through the allocated UL grant.

As such, if the terminal can determine the TPC command setting intention of the base station, when the terminal is allocated a UL grant, it can determine which LCH data to transmit through this. That is, the UE can obtain the effect of improving the service quality by selecting the LCH most suitable for the characteristics of the allocated UL grant.

To this end, the present invention proposes a method of adding a 1-bit indicator indicating the intention of setting the TPC command when the base station allocates a UL grant to the terminal. In the present invention, the 1-bit indicator is referred to as a transmission power boost. However, the embodiment of the present invention is not limited thereto, and other terms indicating the intention of setting the TPC may be used. An example of this is as follows.

- When transmission power boost = 1, it may mean that the UL grant and TPC command allocated by the base station are for traffic transmission requiring a low error rate.

- When transmission power boost = 0, it may mean that the UL grant and TPC command allocated by the base station are for transmission of general eMBB traffic, not URLLC traffic.

- Table 2 below shows an example in which transmission power boost item 1 bit is added to the UL grant of LTE.

[Table 2]

More specifically, the operation of the terminal will be described with reference to FIG. 3B.

3B is a diagram illustrating an operation of a terminal according to an embodiment of the present invention.

(1) The terminal may receive the LCH list in step S360. The UE may receive an LCH list corresponding to transmission power boost = 1 and transmission power boost = 0. The UE may receive the LCH list corresponding to each transmission power boost to the UE through an RRC IE such as LogicalChannelConfig IE.

(2) The UE may receive a UL grant in step S361. After receiving the UL grant, the UE checks the transmission power boost item in the UL grant.

A. When transmission power boost = 1, the UE selects an LCH corresponding to transmission power boost = 1 according to the correspondence between the LCH and the transmission power boost provided by the base station, and performs an LCP operation on the selected LCH.

B. When transmission power boost = 0, the UE selects an LCH corresponding to transmission power boost = 0 according to the correspondence between the LCH and the transmission power boost provided by the base station, and performs an LCP operation on the selected LCH.

(3) And, after performing the LCP operation in step S362, the UE performs UL transmission.

3C is a diagram illustrating an operation of a base station according to an embodiment of the present invention.

(1) The base station may provide the LCH list corresponding to transmission power boost = 1 and transmission power boost = 0 to the terminal in step S370. The base station may provide the LCH list corresponding to each transmission boost to the terminal through an RRC IE such as a LogicalChannelConfig IE.

(2) The base station may transmit a UL grant in step S371. The base station may include a transmission power boost item in the UL grant, and the terminal checks the transmission power boost item in the UL grant.

(3) Then, the base station may receive uplink data from the terminal in step S272. In this case, the uplink data may be data related to the LCH corresponding to the transmission power boost. Specific details are the same as described above, and will be omitted below.

A third embodiment proposed by the present invention is as follows.

In the 5G mobile communication system or the NR system under discussion in 3GPP, communication between a base station and a terminal may be performed through various types of numerology and TTI length. Therefore, the UL grant allocated by the base station for UL transmission of the terminal may also correspond to one of various combinations of numerology and TTI length. In addition, such a system should not only support various services with different requirements, such as eMBB, URLLC, eMTC, etc., but also easily support services expected to appear in the future without major changes to the system.

Here, there may be a correspondence between the physical property information (physical layer property information, for example, numerology and TTI length, etc.) of the UL grant and the service. For example, a UL grant including specific physical characteristic information may be more suitable when the UE transmits eMBB traffic, and a UL grant including other physical characteristics may be more suitable when the UE transmits URLLC traffic. At this time, there are the following physical property information that can be considered.

- TTI length, slot length, symbol length

- Subcarrier spacing, cyclic prefix length

- MCS level, transmission power

- Number of symbols per subframe or TTI or slot

- Total bandwidth of allocated resources, FFT size

- Etc

The information is information required to generate a PHY packet in the physical layer of the terminal, and terms other than physical characteristic information may be used. The physical layer of the UE must know all the parameters listed above in order to generate a PHY packet and perform UL transmission. Only then can a correct PHY packet be generated and UL transmission can be performed. However, the MAC layer of the terminal does not need to know all parameters, and only needs to know some parameters related to scheduling, such as LCP. Informing the MAC layer of other parameters not only increases the implementation complexity of the terminal, but also shares unnecessary information between layers, so it must be avoided.

Accordingly, the base station may inform the terminal of the physical characteristic information of the UL grant for the LCP operation, and there may be mainly two methods for informing the terminal.

- Method 1) When the base station allocates a UL grant to the terminal, it notifies the profile ID corresponding to the physical characteristics of the UL grant. Specific details will be described with reference to FIG. 4 . In the present invention, the profile ID may be used interchangeably with the term physical characteristic ID.

- Method 2) The base station may inform the value of a parameter belonging to a predetermined parameter set when allocating a UL grant to the terminal. Accordingly, the terminal checks the value of the parameter belonging to the predetermined parameter set after receiving it. And it is determined which physical characteristic ID the allocated UL grant corresponds to by using the parameter value included in the parameter set. Specific details will be described with reference to FIG. 5 .

Method 1 and Method 2 are compared with each other and described as follows.

In the case of method 1, from the standpoint of the UE, the physical characteristics of the UL grant are identified only with the profile ID informed by the base station, regardless of what physical characteristics the UL grant allocated by the base station actually has. For example:

- UL grant 1: Subcarrier spacing = S1 kHz, TTI length = T1 ms, MCS level = M1, TPC command = +1 dB -> Physical characteristic ID = A

- UL grant 2: Subcarrier spacing = S1 kHz, TTI length = T1 ms, MCS level = M2, TPC command = +1 dB -> Physical characteristic ID = B

- UL grant 3: Subcarrier spacing = S1 kHz, TTI length = T1 ms, MCS level = M1, TPC command = +4 dB -> Physical characteristic ID = C

- UL grant 4: Subcarrier spacing = S2 kHz, TTI length = T2 ms, MCS level = M1, TPC command = +1 dB -> Physical characteristic ID = A

Referring to the above example, UL grant 1 and UL grant 2 correspond to a case where only the MCS level is different. In addition, UL grant 1 and UL grant 3 correspond to a case where only the TPC command is different. In addition, UL grant 1 and UL grant 4 correspond to a case where subcarrier spacing and TTI length are different. In this situation, UL grant 1 and UL grant 2 have different profile IDs, and UL grant 1 and UL grant 3 also have different profile IDs. However, UL grant 1 and UL grant 4 have the same profile ID despite having different subcarrier spacing and TTI length.

In this example, the base station informs the terminal by setting parameters (subcarrier spacing, TTI length, MCS level, TPC command, etc.) and profile ID according to the UL scheduling intention of the base station for the terminal, but the terminal informs the terminal what parameter of the UL grant is the UL grant It is not known whether the profile ID of The advantages of this method are as follows.

- Even if the MAC layer of the UE does not directly understand various parameters such as subcarrier spacing, TTI length, MCS level, and TPC command, the UL grant can be distinguished through the physical characteristic ID.

- Also, the base station can freely set parameters related to the UL grant to correspond to the profile ID of the UL grant.

However, for method 1, the base station needs to inform the terminal of the profile ID directly through the UL grant. That is, the base station should include additional information in the UL grant.

Meanwhile, the base station may transmit the LCH list corresponding to the profile ID to the terminal. That is, the base station may transmit mapping information between the profile ID and the LCH to the terminal, and the base station may transmit the information to the terminal using RRC signaling.

Accordingly, the UE may perform LCP by receiving the UL grant and selecting an LCH corresponding to a profile ID included in the UL grant. Specific details will be described with reference to FIG. 4 .

4 is a diagram illustrating a method of directly informing a profile ID when a base station allocates a UL grant to a terminal according to an embodiment of the present invention.

Referring to FIG. 4 , the base station may transmit mapping information between the profile ID and the LCH (or LCH-related mapping information) in step S410 . In this case, the mapping information may be configured in various ways as information indicating the relationship between the LCH and the profile ID. For example, the information may be information on a list of LCHs corresponding to each profile ID, or information to which a profile ID corresponding to each LCH is mapped. Alternatively, another method may be used to establish a relationship between the LCH and the profile ID. For example, the mapping information may be set as shown in Table 5. Specific details will be described later.

And, the base station may transmit a UL grant to the terminal in step S420. In this case, the UL grant may include a profile ID. As mentioned above, the profile ID may be set regardless of the physical characteristic information included in the UL grant.

Accordingly, the UE may select the LCH in step S430. The UE may select the LCH using the received profile ID and mapping information.

Thereafter, the terminal may perform the LCP in step S440. That is, the UE may allocate data transmitted through the selected LCH to the resource indicated through the UL grant. Alternatively, the UE may generate a transport block corresponding to the size of a resource allocated through the UL grant using the data.

And, the terminal may transmit data in step S450.

However, the same method may be applied even when the profile ID is not used in this drawing. That is, the base station may inform the terminal of mapping information between the profile and the LCH. Accordingly, the UE may select an LCH mapped to the profile of the received UL grant without checking the profile ID.

On the other hand, in the case of method 2, the base station notifies the value of the parameter belonging to the previously promised parameter set when allocating the UL grant to the terminal, and the terminal checks the value of the parameter belonging to the previously promised parameter set after receiving it. And the UE determines which profile ID the assigned UL grant corresponds to. For example:

It is assumed that the parameters promised to be used by the base station and the terminal when determining the profile ID are the subcarrier spacing value and the TTI length. In this case, the physical property information included in each UL grant may be as follows.

- UL grant 1: Subcarrier spacing = S1 kHz, TTI length = T1 ms, MCS level = M1, TPC command = +1 dB -> Physical characteristic ID = A

- UL grant 2: Subcarrier spacing = S1 kHz, TTI length = T1 ms, MCS level = M2, TPC command = +4 dB -> Physical characteristic ID = A

- UL grant 3: Subcarrier spacing = S3 kHz, TTI length = T3 ms, MCS level = M1, TPC command = +1 dB -> Physical characteristic ID = C

Referring to the example above, in UL grant 1 and UL grant 2, the subcarrier spacing and TTI length, which are parameters previously agreed by the base station and the terminal to determine the physical characteristic ID, are the same, and other MCS levels and TPC commands are different corresponds to Accordingly, UL grant 1 and UL grant 2 may have the same profile ID.

On the other hand, in UL grant 1 and UL grant 3, subcarrier spacing and TTI length are different from each other, and other MCS levels and TPC commands are the same. Accordingly, UL grant 1 and UL grant 3 may have different profile IDs.

As described above, in Method 2, the profile ID of the terminal is determined only by parameters previously agreed between the base station and the terminal, and other parameters have no effect on determining the profile ID. This method has an advantage in that it is not necessary to add additional information to the UL grant.

On the other hand, in method 2, unlike method 1, the base station needs to inform the terminal what parameter the physical characteristic ID is determined by and what combination of parameters corresponding to each physical characteristic ID is. An example of this is as follows.

For example, when the physical characteristic ID is determined by a combination of TTI lengths such as numerology (or subcarrier spacing), the base station provides information as shown in Table 3 below to the terminal by using an RRC message, etc.

[Table 3]

As can be seen from the table above, when (numerology, TTI length) = (S1, T1) or (S1, T2), it is a UL grant corresponding to Profile ID 1.

In addition, when (numerology, TTI length) = (S1, T3) or (S2, T1) or (S2, T2), it is a UL grant corresponding to Profile ID 2.

In addition, when (numerology, TTI length) = (S2, T3) or (S3, T1), it is a UL grant corresponding to Profile ID 3.

In addition, when (numerology, TTI length) = (S3, T2) or (S3, T3), it is a UL grant corresponding to Profile ID 4.

In this case, when the UE is allocated a UL grant, it can check numerology and TTI length, and know the profile ID of the UL grant through Table 3 above.

As another example, when the profile ID of the UL grant is determined by the TTI length and the conservative MCS item proposed in the present invention, the base station provides the information shown in Table 4 below to the terminal by using an RRC message, etc.

[Table 4]

As can be seen in the table above, when (TTI length, conservative MCS) = (T1, 0) or (T1, 1), it is a UL grant corresponding to Profile ID 1.

In addition, if (TTI length, conservative MCS) = (T2, 1) or (T3, 1), it is a UL grant corresponding to Profile ID 2.

In addition, if (TTI length, conservative MCS) = (T2, 0) or (T3, 0), it is a UL grant corresponding to Profile ID 3.

In addition, if (TTI length, conservative MCS) = (T4, 0) or (T4, 1), it is a UL grant corresponding to Profile ID 4.

In this case, when the terminal is allocated a UL grant, it can check the TTI length and conservative MCS items, and know which profile ID the allocated UL grant has through the table above.

Meanwhile, as in FIG. 4 , the base station may transmit the LCH list corresponding to the profile ID to the terminal. That is, the base station may transmit mapping information between the profile ID and the LCH to the terminal, and the base station may transmit the information to the terminal using RRC signaling.

In addition, the base station may transmit information about a parameter set used for the terminal to check the profile ID to the terminal.

Accordingly, the UE may receive the UL grant and check the profile ID based on the physical characteristic information (parameters) included in the UL grant. In addition, the UE may perform LCP by selecting an LCH corresponding to the profile ID. Specific details will be described with reference to FIG. 5 .

5 is a profile in which the base station does not directly inform the profile ID when allocating the UL grant to the terminal according to an embodiment of the present invention, but a predefined profile showing the parameters identified by the terminal directly or indirectly through the UL grant or other signaling. It is a diagram showing a method of deriving a profile ID by comparing the corresponding relationship between ID and parameter.

Referring to FIG. 5 , the base station may transmit mapping information between the profile ID and the LCH (LCH-related mapping information or first mapping information) in step S510. In this case, the method of transmitting the mapping information is the same as the method described with reference to FIG. 4 , and details will be described later.

Then, the base station may transmit parameter set information to the terminal in step S520. In this case, the parameter set information may be configured in various ways as information for use in confirming the profile ID. For example, the information may be information about a parameter set corresponding to each profile ID, or information to which a profile ID corresponding to each parameter set is mapped. Alternatively, another method may be used to establish the relationship between the parameter set and the profile ID. Accordingly, the parameter set information may be referred to as parameter-to-profile ID mapping information, parameter-related mapping information, or second mapping information.

And, the base station may transmit a UL grant to the terminal in step S530. In this case, the UL grant may not include a profile ID.

Thereafter, in step S540, the base station may identify the profile ID using the physical characteristic information (or parameters) included in the UL grant and the parameter-related mapping information.

And, the base station may select the LCH in step S550. The UE may select the LCH using the received profile ID and LCH-related mapping information.

Thereafter, the base station may perform LCP in step S560. That is, the UE may allocate data transmitted through the selected LCH to the resource indicated through the UL grant. Alternatively, the UE may generate a transport block corresponding to the size of a resource allocated through the UL grant using the data.

And, the terminal may transmit data in step S570.

However, the same method may be applied even when the profile ID is not used in this drawing. That is, the base station may inform the terminal of parameter set information (or profile), and may inform the terminal of mapping information between the parameter set and the LCH. Accordingly, the UE may select an LCH mapped according to information set in the corresponding parameter set without checking the profile ID.

Meanwhile, in the above, information required for the terminal to derive the profile ID of the UL grant, for example, numerology, TTI length, MCS, TPC command, conservative MCS, transmission power boost, etc. is transmitted through the UL grant as an example. did However, the UE may determine such information, in particular, numerology and TTI length, through other methods other than the UL grant. An example of this is as follows.

1. The base station sets a bandwidth part for transmitting and receiving control information such as PDCCH or control channel and data or data channel such as PDSCH to the terminal. This may be performed through RRC signaling or the like.

- In this case, each bandwidth part may correspond to a specific numerology or a specific TTI length. The corresponding relationship between this bandwidth part and a specific numerology or a specific TTI length may be notified by the base station to the terminal through RRC signaling or the like.

- Therefore, if the terminal receives a specific bandwidth part from the base station, it can determine the numerology or TTI length of the UL resource to which it is allocated.

2. The base station sets the bandwidth part to be monitored in order for the terminal to receive control information such as PDCCH to the terminal. This may be performed through RRC signaling or the like.

- In this case, each bandwidth part may correspond to a specific numerology or a specific TTI length. The correspondence between this bandwidth part and a specific numerology or a specific TTI length may be notified by the base station to the UE through RRC signaling or the like.

- Therefore, if the terminal receives a specific bandwidth part for the purpose of receiving control information such as PDCCH from the base station, it can determine the numerology or TTI length of the UL resource to be allocated to it.

3. The base station informs the terminal of the time and frequency resource location for transmitting and receiving data such as PDSCH through control information such as PDCCH, and the terminal receiving it can determine which bandwidth part the allocated resource belongs to.

- In this case, each bandwidth part may correspond to a specific numerology or a specific TTI length. The correspondence between this bandwidth part and a specific numerology or a specific TTI length may allow the base station to notify the UE of RRC signaling, etc.

- Therefore, if a time/frequency resource of a specific bandwidth part is allocated as a resource for transmitting and receiving data, through this, the UE can determine the numerology or TTI length of the UL resource allocated to it.

4. The base station notifies the terminal of a time interval or PDCCH monitoring occasion of a subframe or slot or symbol that the terminal needs to monitor in order to receive control information such as PDCCH. This may be performed through RRC signaling or the like.

- In this case, a time interval or PDCCH monitoring occasion of a subframe or slot or symbol to be monitored in order to receive control information may correspond to a specific numerology or a specific TTI length. The corresponding relationship between the PDCCH monitoring occasion and a specific numerology or a specific TTI length may be notified by the base station to the UE through RRC signaling or the like.

- Therefore, if a specific time interval or a specific PDCCH monitoring occasion is set as a time interval to be monitored in order to receive control information, the UE can determine the numerology or TTI length of the UL resource to which it is allocated.

5. The base station notifies the terminal of the time interval and bandwidth part of a subframe or slot or symbol that the terminal needs to monitor in order to receive control information such as PDCCH. This may be performed through RRC signaling or the like.

- In this case, a combination of a time interval (or PDCCH monitoring occasion) and a bandwidth part of a subframe or slot or symbol to be monitored in order to receive control information may correspond to a specific numerology or a specific TTI length. Such correspondence may be established in the terminal through RRC signaling or the like.

- Therefore, if a specific time interval and bandwidth part are allocated as the time interval and frequency domain to be monitored in order to receive control information, the UE can determine the numerology or TTI length of the UL resource to be allocated through this.

6. A correspondence between the DCI format and numerology or TTI length (or a combination of numerology and TTI) used when the base station allocates a UL grant to the terminal may be established.

- For example, the fact that the UL resource allocated through the UL grant using DCI format1 is a specific numerology N1 or a specific TTI T1 may be predefined. Accordingly, the UE can know the numerology or TTI length of the allocated UL resource using the DCI format information. Similarly, the fact that the UL resource allocated through the UL grant using DCI format 2 is a specific numerology N2 or a specific TTI T2 may be predefined. Accordingly, the UE can know the numerology or TTI length of the allocated UL resource using DCI format information.

- The correspondence between the DCI format and numerology or TTI or a combination thereof may be transmitted to the terminal through RRC signaling or may be established between the base station and the terminal by specifying it in a standard.

So far, a method for the terminal to find out the profile ID of the UL grant allocated from the base station has been described. The reason for classifying the UL grant according to physical characteristics is to transmit traffic belonging to a more suitable service (ie, LCH) through the UL grant when the UE is allocated a UL grant having a specific physical characteristic.

Therefore, when the base station is allocated a profile ID and a UL grant having the corresponding physical characteristics, the base station defines a corresponding relationship between LCHs suitable for transmission and informs the terminal. The correspondence between the profile ID and the LCH may be reported to the terminal by the base station transmitting a message such as logical channel configuration information to the terminal through RRC signaling or the like.

Also, as described above, the profile ID may be included in downlink control information (DCI) when the base station allocates a UL grant to the terminal.

The correspondence between the profile ID and the LCH may be set, for example, as shown in Table 5.

[Table 5]

Table 5 above describes the correspondence between the physical characteristic ID and the LCH. In order to transmit the information to the terminal, when the base station provides information about a specific logical channel to the terminal through an RRC message, etc., the profile ID may be included in the information about the logical channel.

Table 6 below is an RRC information element used when the base station provides information about a specific logical channel to the terminal, that is, an example including the profile ID specified as profileIdentity in the logical channel configuration information element (LogicalChannelConfig information element) is showing

[Table 6]

The bucket size duration (bucketSizeDuration) indicates the bucket size duration for the LCP operation, and is a parameter that determines the maximum data size that can be allocated in the LCP step 1.

The logical channel group (logicalChannelGroup) indicates the ID of the logical channel group to which the logical channel belongs. The above parameter is used for BSR (operation informing the base station of the data size in the buffer).

The logicalChannelSR-Mask may control whether SR can be initiated for each logical channel when UL resources are allocated to the UE.

When the logicalChannelSR-ProhibitTimer is set to TRUE, it indicates that the logicalChannelSR-ProhibitTimer is used for the logical channel. In case of E-UTRA, the corresponding item can be applied only when logicalChannelSR-ProhibitTimer is set.

The prioritisedBitRate may indicate a prioritized bit rate used for LCP operation (it may indicate a parameter for determining the data size allocated in LCP step 1).

The priority (priority) may indicate the priority of the logical channel.

Profile ID (profileIdentity) may indicate a profile ID corresponding to a specific logical channel. When the terminal is allocated a UL resource having a specific profile ID, the terminal may select a logical channel corresponding to the profile ID and perform an LCP operation on the selected logical channel.

Therefore, after the terminal receives the UL grant, the terminal checks the profile ID and when it is confirmed that the profile ID is 1, the terminal performs the LCP procedure on LCH a and LCH b.

In addition, after receiving the UL grant, the terminal checks the profile ID. If the profile ID is 2, the LCP procedure is performed on LCH c and LCH d.

In addition, after receiving the UL grant, the terminal checks the profile ID and when the profile ID is 3, the LCP procedure is performed on LCH a, LCH b, LCH c, and LCH d.

At this time, as a method of checking the profile ID, as described above, the profile ID is directly included in the UL grant so that the terminal checks the profile ID in the UL grant (Method 1), or a profile based on specific information in the UL grant A method of verifying the ID (Method 2) can be used.

As described above, in the present invention, the UE receives the UL grant, checks the profile ID, selects the corresponding LCH, and performs the LCP operation. The present invention includes a method in which the base station independently sets priorities between LCHs for each profile ID for the LCP operation of the terminal. That is, in the above example, if the terminal is allocated a UL grant with profile ID 1, the priorities between LCHs are set in the order of LCH a > LCH b, and if the terminal is allocated a UL grant with profile ID 2, LCH c > LCH d in the order Set the priority between LCHs. In addition, if the UE is allocated a UL grant with profile ID 3, the priorities between LCHs are set in the order of LCH d > LCH c > LCH b > LCH a.

A fourth embodiment proposed by the present invention is as follows.

In the 5G mobile communication system or NR, the UE may be allocated a plurality of UL grants having different numerology or TTI length according to the design of the physical layer. In this case, the UE needs a method of determining which UL grant to process first among a plurality of UL grants. The base station and the terminal may perform different operations according to the order in which the terminal processes the UL grant. First, the effect of the UL grant processing order on the base station and the terminal will be described.

First, the UL grant processing order of the UE may affect the remaining traffic amount of each LCH after LCP. Specific details will be described below.

6 is a diagram illustrating an amount of data belonging to each LCH and Bj of each LCH j according to an embodiment of the present invention.

At this time, it is assumed that the UE uses three LCHs (LCH a (610), LCH b (620), and LCH c (630)), and the priority between LCHs is high in the order of LCH a, LCH b, and LCH c. .

The amount of data 640 included in each LCH is as shown in FIG. 6 , and the amount of data to be allocated preferentially among the data included in the LCH Ba (650), Bb (660), Bc (670). It is also as shown in FIG. 6 .

In addition, it is assumed that the UE is allocated two UL grants (UL grant X and UL grant Y), UL grant X can be used to transmit LCH a and LCH b, and UL grant Y can be used to transmit LCH a and c do. In this case, the amount of data that can be transmitted by each UL grant is as shown in FIG. 7 .

7 is a diagram illustrating two types of UL grants allocated to a terminal by a base station and a corresponding relationship between a UL grant and an LCH according to an embodiment of the present invention. Referring to FIG. 7 , it can be seen that UL grant X is mapped to LCHs a and b, and UL grant Y is mapped to LCHs a and c.

In addition, the amount of data that can be transmitted by each UL grant is the same as 730 and 740 shown in FIG. 7, respectively.

In this situation, the UL grant processing order of the UE may affect the remaining traffic amount of each LCH, and details will be described with reference to FIGS. 8 and 9 .

8 is a diagram illustrating an example of processing UL grant X first and then processing UL grant Y. Referring to FIG.

Referring to FIG. 8 , since data included in LCH a and LCH b can be allocated to UL grant X 810 , Ba 811 of LCH a having high priority is first allocated, and then Bb of LCH b (812) is assigned. Thereafter, data 813 of LCH a remaining in the remaining resources of UL grant X is allocated.

Next, since all data of LCH a is allocated, data 821 and 822 of LCH c are allocated to UL grant Y 820. FIG. 9 shows an example of processing UL grant Y first and then processing UL grant X. It is the drawing shown.

Referring to FIG. 9 , since LCH a and LCH c can be transmitted to UL grant Y 910, Ba 911 of LCH a having high priority is allocated first, and then Bc 912 of LCH c is allocated. do. Thereafter, data 913 of LCH a remaining in the remaining resources of the UL grant is allocated.

Next, Bb 921 of LCH b is first allocated to UL grant X 920. The remaining data 922 of LCH a is then allocated and then the remaining data 923 of LCH b is allocated.

In each case, the amount of data remaining in each LCH after LCP is shown at 840 of FIG. 8 and 940 of FIG. 9 . In this way, the amount of data remaining in each LCH after LCP varies according to the processing order of the UL grant. Therefore, the processing order of the UL grant affects the amount of data remaining in each LCH remaining after the LCP.

Meanwhile, the processing order of the UL grant of the UE may affect HARQ retransmission, and details will be described with reference to FIG. 10 .

10 is a diagram illustrating an example in which different UL grants have different HARQ timelines.

It is assumed that there are 100 data to be transmitted in the buffer of the terminal. In addition, it is assumed that the UE simultaneously receives two UL grants (UL grant X and UL grant Y).

Referring to FIG. 10 , UL grant X may have a shorter HARQ timeline than UL grant Y. Also, it is assumed that the size of data that can be transmitted through UL grant X is 40 and the size of data that can be transmitted through UL grant Y is 80. In this situation, the following two cases can be considered.

Case 1) When the UE processes UL grant X first and processes UL grant Y later.

Since there are 100 data to be transmitted in the buffer of the UE, the UE allocates 40 data to UL grant X first, and then allocates 60 data to UL grant Y.

Case 2) When the UE processes UL grant Y first and processes UL grant X later.

Since there are 100 data to be transmitted in the buffer of the terminal, the terminal allocates 80 data to UL grant Y first, and then allocates 20 data to UL grant X.

Comparing the two cases described above, the amount of data allocated to the UL grant X having a shorter HARQ timeline is different depending on the case. Since the UL grant X has a shorter HARQ timeline, it may be beneficial for the UE to transmit data through the UL grant X in terms of latency. Therefore, when more data is transmitted through UL grant X, case 1 can be considered more advantageous than case 2 in terms of latency. That is, when data is allocated in the same order as in case 1, HARQ ACK/NACK is determined faster for more data and retransmission is performed faster, so that the terminal can process the traffic in the buffer faster.

As such, since the processing order of the UL grant affects the amount of remaining traffic and HARQ retransmission, a method for processing the UL grant when the UE receives a UL grant having a plurality of different characteristics is needed. Basically, you can think of it in the following way.

- Method 1: The base station determines the UL grant processing order of the terminal, that is, which UL grant should be processed first, and informs the terminal through an RRC message. When the UE receives a plurality of UL grants according to the UL grant processing order informed by the base station, the UE processes the UL grants in that order.

- Method 2: The UL grant processing order is specified in the standard document that defines the operation of the base station and the terminal. In this case, when receiving a plurality of UL grants, the UE processes the UL grants in the order specified in the standard document.

- Method 3: The UE's UL grant processing order is determined by the UE itself by UE implementation.

The UL grant processing order applicable to each method described above is as follows.

- When the UE receives a plurality of UL grants, the UE processes the UL grants in the order of the shortest TTI.

- When receiving a plurality of UL grants, the UE checks the priority of LCHs that can be transmitted through each UL grant, and processes the UL grants in the order of the confirmed priority. For example, it is assumed that the UE simultaneously receives UL grant X and UL grant Y, can transmit LCH 1 and LCH 3 through UL grant X, and can transmit LCH 2 and LCH 4 through UL grant Y. . In addition, when the LCH priorities are high in the order of LCH 1, LCH 2, LCH 3, and LCH 4, the UE first processes UL grant X capable of transmitting LCH 1 with the highest priority, and then processes UL grant Y. .

- The UE sequentially detects the UL grant while decoding the PDCCH. At this time, when the UE detects a plurality of UL grants, the UE processes the UL grants in the order in which each UL grant is detected. In addition, the base station encodes the PDCCH including a plurality of UL grants so that the UE determines the UL grant processing order and enables the UE to detect the UL grant according to the order.

- When the UE receives a plurality of UL grants, after checking the number of bits that can be transmitted through each UL grant, the UE processes the UL grants in the order in which many bits can be transmitted. Using this method, it is possible to reduce a situation in which data belonging to one LCH is transmitted while being distributed over a plurality of UL grants.

Hereinafter, a specific method for determining the UL grant processing order of the terminal when the terminal is allocated a plurality of UL grants from the base station is proposed. As mentioned above, in the 5G mobile communication system or 3GPP NR (New Radio) system considered in the present invention, different numerology (or subcarrier spacing or cyclic prefix length) or TTI length for communication between the base station and the terminal A radio resource with which it has may be used. For example, if the system supports subcarrier spacing of 15 kHz, 30 kHz, 60 kHz, and 120 kHz and TTI length of 1 symbol, 2 symbol, 1 slot, and 1 subframe, the radio resource used for communication between the base station and the terminal is It may correspond to one of the resource types shown in Table 7 below. The index of this resource type is called a resource profile (profile) in the present invention.

[Table 7]

In the present invention, UL communication between the base station and the terminal is considered. If the base station allocates a plurality of UL grants to the terminal at the same time or within a specific time, the terminal may have to start processing the plurality of UL grants allocated from the base station at the same time. In this case, the amount of traffic per logical channel that the terminal transmits to the base station, that is, the base station receives from the terminal, may vary according to the UL grant processing order of the terminal. This is because different UL grants may be designated to transmit traffic belonging to different logical channels. Specific details are the same as described above.

If the base station knows the UL grant processing order of the terminal, when the base station allocates an additional UL grant later, resource allocation can be performed while more accurately knowing the amount of traffic remaining for each logical channel of the terminal. Therefore, it is preferable that the UE generates a packet to be transmitted according to the UL grant processing order determined when receiving a plurality of UL grants from the base station, and the base station reflects this when allocating resources to be generated later according to the UL grant processing order of the UE. Therefore, a method for determining the UL grant processing order is proposed below.

There may be an example of a situation in which the terminal needs to start processing a plurality of UL grants at the same time after being allocated a plurality of UL grants from the base station.

① The UE simultaneously receives a plurality of UL grants from different CCs (Component Carriers).

② The UE simultaneously receives a plurality of UL grants in different BWPs (Bandwidth Part) within one CC.

<Example 4-1>

In the 5G mobile communication system or the NR system, a situation occurs in which a specific LCH can be transmitted only through a UL grant having a specific attribute. Here, the attributes of the UL grant may include numerology, TTI length, transmission power, processing time, CC, subcarrier spacing, CP (Cyclic Prefix) length, and the like. For example, the LCH for eMBB may be transmitted through a UL grant having a TTI length of 1 symbol, 2 symbols, 1 slot, and 1 subframe. However, the LCH for URLLC can be transmitted only through a UL grant having a TTI length of 1 symbol and 2 symbols, and cannot be transmitted through a UL grant having a TTI length of 1 slot and 1 subframe.

There is also a priority between LCHs. For example, the base station sets the priority of the corresponding LCH together when configuring the LCH to the terminal. Therefore, when receiving the UL grant, the UE may perform Logical Channel Prioritization (LCP) operation according to the priorities between LCHs. That is, the UE includes a certain amount of traffic in the assigned UL grant in the order of the LCHs of high priority, and then includes the remaining traffic in the buffer in the order of the LCHs of high priority in the remaining UL grant. Specific details are the same as described above.

In this way, in the NR system, (i) a correspondence relationship between a UL grant and an LCH and (ii) a priority between the LCHs exist. Therefore, the terminal to which the UL grant is allocated can know what LCH can be transmitted through the UL grant allocated according to the information given in advance, and the following information according to the priority between the LCHs.

① Minimum value of LCH priority that can be transmitted through the allocated UL grant. Here, the minimum means that the LCH has the highest priority.

② The maximum value of the LCH priority that can be transmitted through the allocated UL grant. Here, the maximum means that the LCH has the lowest priority.

③ Average value of LCH priority that can be transmitted through the allocated UL grant

As an example, it is assumed that the base station sets LCH a, LCH b, and LCH c to the terminal, and the priority of each LCH is 1, 2, and 3 in the order of LCH a, LCH b, and LCH c. In addition, when the terminal is allocated three UL grants from the base station, it is assumed that the LCH that can be transmitted through each UL grant is as shown in Table 8 below. Then, the information described above can be derived as shown in Table 8.

[Table 8]

Based on this, in the present invention, when the UE receives a plurality of UL grants, the UL grant processing order may be determined as follows.

① The UE checks the (corresponding) LCH that can be transmitted through the allocated UL grant.

② The UE checks the LCH priority.

③ The UE derives at least one of the following based on the LCH priority. Hereinafter, the value derived below may be referred to as LCH priority related information.

- Minimum value of LCH priority that can be transmitted through the allocated UL grant

- Maximum value of LCH priority that can be transmitted through the allocated UL grant

- Average value of LCH priority that can be transmitted through the allocated UL grant

④ The UE may determine the UL grant processing order by using any one of the following methods based on the derived LCH priority related information.

- UL grants are processed in the order of the smallest LCH priority that can be transmitted through the allocated UL grant.

- UL grants are processed in the order of the smallest LCH priority value that can be transmitted through the allocated UL grant.

- UL grants are processed in the order of the smallest average value of LCH priorities that can be transmitted through the allocated UL grant.

⑤ If there are a plurality of UL grants having the same LCH priority-related information derived by the terminal, that is, the minimum, maximum, or average value of LCH priority that can be transmitted through the UL grant allocated from the base station, the processing order between them may be determined by another proposed method of the present invention.

<Example 4-2>

11 is a diagram illustrating a HARQ time relationship according to an embodiment of the present invention.

The NR system supports a flexible HARQ timeline. Referring to FIG. 11, the time until the terminal receives the UL grant from the base station and transmits data is named Ta, and the time until the base station receives data from the terminal and transmits ACK or NACK can be named Tb. . In this case, the lengths of Ta and Tb may be variable according to the setting of the base station, through negotiation between the base station and the terminal, or according to a predetermined standard.

Here, Ta may be notified by the base station to the terminal through a UL grant. In addition, the base station informs the terminal of the correlation between the resource profile (profile) and Ta through RRC signaling and informs the terminal of the resource profile (profile) through the UL grant, so that the terminal can determine Ta when receiving the UL grant. . In this case, the information on the correlation between the resource profile and Ta is information on the correlation between all or part of the information included in the UL grant and Ta or the above-described information on the correlation between the profile ID and Ta. can be

In addition, Tb may be determined by the base station allocating resources for feedback of ACK/NACK to the terminal, or the base station may inform the terminal through a UL grant or RRC signaling.

The sum of Ta and Tb, that is, the time taken until the terminal receives the UL grant from the base station and the terminal receives the ACK/NACK for the data it transmits from the base station is called Tc. In the present invention, terms such as first time, second time, and third time may be used to distinguish between Ta, Tb, and Tc.

This embodiment proposes a method of processing the UL grants in the order of the earliest data transmission times when the terminal is allocated a plurality of UL grants from the base station. That is, UL grants are processed in the shortest order of Ta. Specific details will be described with reference to FIG. 12 .

12 is a diagram illustrating a time between various UL grant reception times and data transmission times according to an embodiment of the present invention.

① The UE checks the time it takes to transmit data after receiving the UL grant, that is, Ta. In this case, the following method may be used to confirm Ta.

- Ta may be specified in a specific field in DCI (Downlink Control Information).

- As another example, in DCI, the profile ID (profile ID) of the UL resource allocated by the base station to the terminal is specified, and the terminal may identify Ta through the mapping relationship between the profile ID and Ta provided from the base station through RRC signaling, etc. there is.

- As another example, the terminal may determine Ta according to where the bandwidth part to which the UL resource allocated from the base station belongs. To this end, the base station may provide a mapping relationship between the bandwidth part and Ta through RRC signaling or the like. That is, UL resources allocated within a specific bandwidth part may have a specific Ta. Specific details will be described later.

- As another example, the terminal may determine Ta according to the time and frequency resource (or PDCCH monitoring occasion) of the PDCCH received from the base station. To this end, the base station may provide a mapping relationship between the time and frequency resources of the PDCCH and Ta through RRC signaling or the like. That is, a UL resource allocated through a PDCCH received on a specific time and frequency resource (or PDCCH monitoring occasion) may have a specific Ta. Specific details will be described later.

- As another example, the terminal may determine Ta from the type of DCI format received from the base station. To this end, the base station may provide a mapping relationship between the DCI format and Ta through RRC signaling or the like. Alternatively, a mapping relationship between the DCI format and Ta is described in a standard document describing the physical layer or MAC layer operations of the base station and the terminal. That is, a UL resource allocated through a specific DCI format may have a specific Ta.

② And, the terminal processes the UL grant in the order of the shortest Ta.

③ If there are a plurality of UL grants having the same metric derived by the UE in step 1, that is, the time taken from receiving the UL grant to data transmission, the processing order between them may be determined by another proposed method of the present invention.

12, the time between UL grant 1 reception and data 1 transmission is T _{a ,1} (1210), and the time between UL grant 2 reception and data 2 transmission is T _a,2 (1220). ), the time between the UL grant 3 reception time and the data 3 transmission time is T _{a ,3} (1230), and the time between the UL grant 4 reception time and the data 4 transmission time can be expressed as T _{a ,4} (1240).

According to the method proposed in the present invention, the time between the reception time of the UL grant and the transmission time of data is T _{a ,1} (1210) < _{Ta ,2} (1220) < _{Ta ,3} (1230) < _{Ta ,4} Since it may have the relationship 1240, the UE may process the UL grant in the order of UL grant 1, UL grant 2, UL grant 3, and UL grant 4.

According to the same principle, in the present invention, when the terminal is allocated a plurality of UL grants from the base station, a method of processing the UL grants in the order of the data transmission time is also possible. That is, UL grants are processed in the order of the longest Ta. 12, the UE may process the UL grant in the order of UL grant 4, UL grant 3, UL grant 2, and UL grant 1.

On the other hand, in this embodiment, when the terminal is allocated a plurality of UL grants from the base station in another method, a method of processing the UL grants in the order from the UL grant reception time to the ACK or NACK reception time for data transmission is proposed. That is, the UL grant is processed in the shortest order of Tc. Specific details will be described with reference to FIG. 13 .

13 is a diagram illustrating a time between various UL grant reception times and ACK/NACK reception times according to an embodiment of the present invention.

① The UE checks the time it takes to transmit data after receiving the UL grant, that is, Ta. In this case, the following method may be used to confirm Ta.

- Ta may be specified in a specific field in DCI (Downlink Control Information).

- As another example, in DCI, the profile ID (profile ID) of the UL resource allocated by the base station to the terminal is specified, and the terminal may identify Ta through the mapping relationship between the profile ID and Ta provided from the base station through RRC signaling, etc. there is.

- As another example, the terminal may determine Ta according to where the bandwidth part to which the UL resource allocated from the base station belongs. To this end, the base station may provide a mapping relationship between the bandwidth part and Ta through RRC signaling or the like. That is, UL resources allocated within a specific bandwidth part may have a specific Ta. Specific details will be described later. - As another example, the terminal may determine Ta according to the time and frequency resource (or PDCCH monitoring occasion) of the PDCCH received from the base station. To this end, the base station may provide a mapping relationship between the time and frequency resources of the PDCCH and Ta through RRC signaling or the like. That is, a UL resource allocated through a PDCCH received on a specific time and frequency resource (or PDCCH monitoring occasion) may have a specific Ta. Specific details will be described later.

- As another example, the terminal may determine Ta from the type of DCI format received from the base station. To this end, the base station may provide a mapping relationship between the DCI format and Ta through RRC signaling or the like. Alternatively, a mapping relationship between the DCI format and Ta is described in a standard document describing the physical layer or MAC layer operations of the base station and the terminal. That is, a UL resource allocated through a specific DCI format may have a specific Ta.

② Then, the terminal checks the time it takes from data transmission to reception of ACK or NACK, that is, Tb. At this time, in order to confirm Tb, the following method may be used.

- Tb may be determined by allocating a resource for the base station to feed back ACK/NACK to the terminal.

- As another example, the profile ID of the UL resource allocated by the base station to the terminal is specified in DCI, and the terminal may determine Tb through the mapping relationship between the profile ID and Tb provided from the base station through RRC signaling or the like.

- As another example, the terminal may determine Tb according to where the bandwidth part to which the UL resource allocated from the base station belongs. To this end, the base station may provide a mapping relationship between the bandwidth part and Tb through RRC signaling or the like. That is, UL resources allocated within a specific bandwidth part may have a specific Tb. Specific details will be described later.

- As another example, the UE may determine Tb according to the time and frequency resource (or PDCCH monitoring occasion) of the PDCCH received from the base station. To this end, the base station may provide a mapping relationship between the time and frequency resources of the PDCCH and Tb through RRC signaling or the like. That is, a UL resource allocated through a PDCCH received on a specific time and frequency resource (or PDCCH monitoring occasion) may have a specific Tb. Specific details will be described later.

- As another example, the terminal may determine Tb from the type of DCI format received from the base station. To this end, the base station may provide a mapping relationship between the DCI format and Tb through RRC signaling or the like. Alternatively, a mapping relationship between DCI format and Tb is described in a standard document describing the physical layer or MAC layer operations of the base station and the terminal. That is, UL resources allocated through a specific DCI format may have a specific Tb.

③ Then, the terminal derives Tc by adding the derived Ta and Tb.

④ And the UE processes the UL grant in the order of Tc, that is, the time of receiving ACK or NACK for data transmission from the time of receiving the UL grant in the shortest order.

⑤ If there are a plurality of UL grants in which the metric derived by the UE in step 4, that is, the time taken from the reception of the UL grant to the reception of ACK or NACK for data transmission is the same, the processing order between them is determined by another proposed method of the present invention. can be decided.

13, the time between the UL grant 1 reception time and the ACK or NACK reception time is T _{c ,1} (1310), and the time between the UL grant 2 reception time and the ACK or NACK reception time is T _{c ,2} (1320), the time between the UL grant 3 reception time and the ACK or NACK reception time is T _{c ,3} (1330), and the time between the UL grant 4 reception time and the ACK or NACK reception time is T _{c ,4} (1340). can express

According to the method proposed in the present invention, the time between the reception time of the UL grant and the reception time of ACK or NACK is T _{c ,1} (1310) < T _{c ,2} (1320) < T _{c ,3} (1330) < T _{c ,} Since it may have a relationship such as ₄ (1340), the UE may process the UL grant in the order of UL grant 1, UL grant 2, UL grant 3, and UL grant 4.

According to the same principle, in the present invention, when the terminal is allocated a plurality of UL grants from the base station, it is also possible to process the UL grants in the order from the time of receiving the UL grant to the time of receiving the ACK or NACK for data transmission. 13, the UE may process the UL grant in the order of UL grant 4, UL grant 3, UL grant 2, and UL grant 1.

On the other hand, in the embodiment of the present invention, when the terminal is allocated a plurality of UL grants from the base station, another method is proposed for processing the UL grants in the order from the time of data transmission to the time of ACK or NACK reception. That is, the UL grant is processed in the order of the shortest Tb. Specific details will be described with reference to FIG. 14 .

14 is a diagram illustrating a time between various data transmission times and ACK/NACK reception times according to an embodiment of the present invention.

① The UE checks the time it takes from data transmission to ACK or NACK reception, that is, Tb. In this case, the method for confirming Tb is the same as described above, and will be omitted below.

② And, the terminal processes the UL grant in the order of the shortest Tb determined by the terminal in step 1.

③ If there are a plurality of UL grants with the same metric derived by the UE in step 2, that is, the time taken from data transmission to ACK or NACK reception, the processing order between them may be determined by another proposed method of the present invention.

14, the time between the data 1 transmission time and the ACK or NACK reception time is T _{b ,1} (1410), and the time between the data 2 transmission time and the ACK or NACK reception time is T _{b ,2} (1420) ), the time between the data 3 transmission time and the ACK or NACK reception time may be expressed as T _b,3 (1430), and the time between the data 4 transmission time and the ACK or NACK reception time may be expressed as T _{b ,4} (1440).

According to the method proposed in the present invention, the time between the reception time of the UL grant and the reception time of the ACK or NACK is T _{b ,1} (1410) < T _{b ,2} (1420) < T _{b ,3} (1430) < T _{b ,} Since it may have a relationship such as ₄ (1440), the UE may process the UL grant in the order of UL grant 1, UL grant 2, UL grant 3, and UL grant 4.

According to the same principle, in the present invention, when the terminal receives a plurality of UL grants from the base station, it is possible to process the UL grants in the order from the data transmission time to the ACK or NACK reception time. That is, UL grants are processed in the order of longest Tb. 14, the UE may process the UL grant in the order of UL grant 4, UL grant 3, UL grant 2, and UL grant 1.

When the UL grant processing order is determined according to this method, in particular, the Ta, Tb, or Tc short sequence, the UE preferentially uses a UL grant with a short HARQ timeline over a UL grant with a long HARQ timeline. Therefore, it is possible to prevent the UE from using a UL grant with a short HARQ timeline less than a UL grant with a long HARQ timeline, and as a result, it is possible to quickly determine whether to retransmit or new transmission for as much traffic as possible.

<Example 4-3>

In the NR system, the base station may allocate a plurality of UL grants having different TTI lengths to the terminal.

15 is a diagram illustrating a UL grant allocated to various TTI types and a UL transmission time according to the UL grant according to an embodiment of the present invention.

Referring to FIG. 15 , an example in which the base station allocates UL resources having lengths of 1 symbol TTI (1510), 2 symbol TTI (1520), 1 slot TTI (1530), and 1 subframe TTI (1540) to the UE is shown.

Here, the DCI including the UL resource allocation information may be transmitted to the UE through a symbol, slot, or subframe having the same TTI length as the allocated resource, or through a symbol, slot or subframe having a TTI length different from the allocated resource. It may be transmitted to the terminal. Also, a plurality of DCIs for allocating a plurality of UL resources having different TTI lengths may be delivered to the UE through one PDCCH. Specific details will be described with reference to FIGS. 16 and 17 .

16 is a diagram illustrating a case of allocating UL resources having different TTIs through a UL grant transmitted through a specific TTI according to an embodiment of the present invention.

Referring to FIG. 16 , the UE may receive a UL grant through 1 slot TTI 1610, and a resource allocated by the UL grant may be a resource having a length of 1 subframe TTI 1620. As such, the DCI including the UL resource allocation information may be transmitted to the UE through a resource having a TTI different from the allocated resource.

17 is a diagram illustrating a case of allocating UL resources having a plurality of different TTIs through a PDCCH transmitted in one TTI according to an embodiment of the present invention.

Referring to FIG. 17 , the UE may receive a UL grant through a 1-slot TTI 1710, and the UL grant may allocate a plurality of UL resources having different TTI lengths. Specifically, in this figure, the UL grant may allocate a UL resource having 1 slot TTI 1720 and a UL resource having 1 subframe TTI 1730 . 15 to 17 may be applied to all embodiments described in the present invention.

The present invention proposes a method of processing the UL grants in the order of the TTI lengths of the allocated resources when the terminal is allocated a plurality of UL grants from the base station. The explanation for this is as follows.

① The UE checks the TTI length of the allocated resource after receiving the UL grant. In this case, a method of checking the length of the TTI is as follows.

- The base station may specify the TTI length in DCI so that the terminal can accurately determine the TTI length of the UL resource.

- In addition, the DCI specifies the profile ID of the UL resource allocated to the terminal by the base station, and the base station provides a mapping relationship between the profile ID and the TTI length through RRC signaling. If so, when receiving the UL grant, the UE may check the profile ID through DCI, and may determine the TTI length of the UL resource through the mapping relationship between the profile ID and the TTI length.

- In addition, the base station provides a mapping relationship between the DCI format and the TTI length through RRC signaling, etc. If so, when receiving the UL grant, the UE may check the DCI format and determine the TTI length of the UL resource through the mapping relationship between the DCI format and the TTI length.

- In addition, the base station provides a mapping relationship between the bandwidth part to which the UL resource is allocated and the TTI length through RRC signaling or the like. If so, when receiving the UL grant, the UE may check the allocated bandwidth part of the UL resource, and may determine the TTI length of the UL resource through the mapping relationship between the bandwidth part and the TTI length. A mapping relationship between the bandwidth part and the TTI length will be described with reference to FIG. 18 .

- In addition, the base station provides a mapping relationship between the PDCCH monitoring time point and the TTI length through RRC signaling. This is premised on the assumption that the base station allocates a UL resource composed of only one TTI length at one PDCCH monitoring time point. . If so, when receiving the UL grant, the UE may check the PDCCH monitoring time point and determine the TTI length of the UL resource through the mapping relationship between the PDCCH length and the TTI length. Specific details will be described with reference to FIG. 19 .

- In addition, the base station provides a mapping relationship between the PDCCH monitoring period of the terminal and the TTI length through RRC signaling or the like. This is premised on the assumption that the base station allocates a UL resource composed of only one TTI length in a PDCCH transmitted at a specific period. If so, when receiving the UL grant, the UE may check the monitoring period of the corresponding PDCCH and determine the TTI length of the UL resource through the mapping relationship between the PDCCH length and the TTI length.

- In addition, the base station provides a mapping relationship between the transmission duration and the TTI length through RRC signaling or the like. An example of this is as follows. Here, the transmission period means a period during which the terminal actually continues to transmit a radio signal, and the TTI length is not the same concept. However, in this embodiment, it is assumed that the transmission period and the TTI length are proportional. This is because there is no need to allocate a resource of a short TTI for transmission for a long period, and there is no need to allocate a resource of a long TTI for transmission for a short period as well. Such a transmission period may be notified by the base station to the terminal through DCI or the like. If so, when receiving the UL grant, the UE may check the transmission period and determine the TTI length of the UL resource through the mapping relationship between the TTI length and the UL grant. The mapping relationship between the TTI length and the transmission period may be represented as shown in Table 9 below.

[Table 9]

- In addition, the base station provides a mapping relationship between the PDCCH monitoring time or frequency resource and the TTI length through RRC signaling or the like. This is premised on the premise that the base station allocates a UL resource composed of only one TTI length in one PDCCH monitoring time or frequency resource. If so, the UE may check the PDCCH monitoring time and frequency resource when receiving the UL grant, and may determine the TTI length of the UL resource through a mapping relationship between the TTI length and the PDCCH monitoring time. Details on this will be described with reference to FIGS. 20 and 21 .

② The UE processes the UL grants in the order of the shorter TTI lengths of the UL resources identified in step 1.

③ If there are a plurality of UL grants having the same metric derived by the UE in step 1, that is, the TTI length of the allocated UL resource, the processing order between them may be determined by another proposed method of the present invention.

In the same principle, when the terminal is allocated a plurality of UL grants from the base station, a method of processing the UL grants in the order of the TTI lengths of the allocated resources is also possible.

Meanwhile, a detailed method of checking the length of the TTI will be described below.

18 is a diagram illustrating an example in which a plurality of bandwidth parts operate resources configured with different TTIs in one component carrier according to an embodiment of the present invention.

The base station may divide the bandwidth of the UL resource into a certain number of bandwidth parts, and determine a mapping relationship between the bandwidth part and the TTI length. Specifically, referring to FIG. 18 (a), bandwidth part 1 (1810) is mapped to 1 symbol TTI, bandwidth part 2 (1820) is mapped to 1 slot TTI, and bandwidth part 3 (1830) is 1 subframe may be mapped to TTI. However, the embodiment of the present invention is not limited thereto, and the number of bandwidth parts may be set to two, as shown in FIG. can be mapped. Accordingly, the UE may check the bandwidth part to which the UL resource is allocated, and may determine the TTI length corresponding to the bandwidth part.

In addition, the embodiment of the present invention is not limited thereto. As described above, the terminal may determine the length of Ta, Tb, or Tc according to the bandwidth part. For example, the length of Ta may be mapped to each bandwidth part, and the terminal may determine Ta corresponding to the bandwidth part to which the UL resource is allocated. Also, the above method can be applied to determining Tb and Tc.

In addition, as described later, the UE may determine the SCS according to the bandwidth part.

19A to 19C are diagrams illustrating examples of allocating UL resources having different types of TTI lengths at different PDCCH monitoring time points according to an embodiment of the present invention.

The base station can distinguish the PDCCH monitoring time point and determine a mapping relationship between the PDCCH monitoring time point and the TTI length. Specifically, referring to FIG. 19 (a), the base station may divide the PDCCH monitoring time into a PDCCH monitoring time 1 (1910) and a PDCCH monitoring time 2 (1920). For example, PDCCH monitoring time 1 1910 may be mapped to 1 subframe TTI, and PDCCH monitoring time 2 1920 may be mapped to 1 slot TTI. Accordingly, the uplink resource allocated at PDCCH monitoring time 1 1910 may have a TTI of 1 subframe length, and the uplink resource allocated at PDCCH monitoring time 2 1920 may have a TTI of 1 slot length. Similarly, referring to (b) and (c) of FIG. 19 , PDCCH monitoring time points are respectively determined, and the monitoring time point and the length of the TTI may be mapped.

However, the embodiment of the present invention is not limited thereto, and various number of PDCCH monitoring time points may be set according to the configuration of the base station, and the length of the TTI may be variously mapped according to the PDCCH monitoring time point.

Accordingly, the UE may determine the length of the TTI of the uplink resource according to the PDCCH monitoring time point to which the uplink resource is allocated.

In addition, the embodiment of the present invention is not limited thereto. As described above, the UE may determine the length of Ta, Tb, or Tc according to the PDCCH monitoring time. For example, the length of Ta for each PDCCH monitoring time may be mapped, and the UE may determine Ta according to the PDCCH monitoring time to which the UL resource is allocated. Also, the above method can be applied to determining Tb and Tc.

In addition, as described later, the UE may determine the SCS according to the PDCCH monitoring time point.

20 is a diagram illustrating an example in which UL resources having different types of TTI lengths are allocated in different PDCCH monitoring time and frequency resources according to an embodiment of the present invention.

The base station may divide the PDCCH monitoring time into time and frequency resources, and determine a mapping relationship between the time and frequency resources of the PDCCH monitoring time and the TTI length.

Specifically, referring to FIG. 20 , the base station may divide the PDCCH monitoring time into a PDCCH monitoring time 1 (2010) and a PDCCH monitoring time 2 (2020) according to time and frequency resources. In this case, the time resource and frequency resource of the PDCCH monitoring time point 1 (2010) may be set not to overlap with the time resource and the frequency resource of the PDCCH monitoring time point 2 (2020).

In this case, for example, PDCCH monitoring time 1 2010 may be mapped to 1 subframe TTI, and PDCCH monitoring time 2 2020 may be mapped to 1 slot TTI. Accordingly, the uplink resource allocated at PDCCH monitoring time 1 (2010) may have a TTI of 1 subframe length, and the uplink resource allocated at PDCCH monitoring time 2 (2020) may have a TTI of 1 slot length.

However, the embodiment of the present invention is not limited thereto, and various number of PDCCH monitoring time points may be set according to the configuration of the base station, and the length of the TTI may be variously mapped according to the PDCCH monitoring time point.

Accordingly, the UE may determine the length of the TTI of the uplink resource according to the PDCCH monitoring time and frequency resource to which the uplink resource is allocated.

In addition, the embodiment of the present invention is not limited thereto. As described above, the UE may determine the length of Ta, Tb, or Tc according to the time resource and frequency resource at the time of PDCCH monitoring. For example, the length of Ta for each PDCCH monitoring time time and frequency resource may be mapped, and the UE may determine Ta according to the PDCCH monitoring time point to which the UL resource is allocated. Also, the above method can be applied to determining Tb and Tc.

In addition, as described later, the UE may determine the SCS according to the time and frequency resources of the PDCCH monitoring time.

21 is a diagram illustrating another example in which UL resources having different types of TTI lengths are allocated in different PDCCH monitoring time and frequency resources according to an embodiment of the present invention.

As in FIG. 20 , the base station may divide the PDCCH monitoring time into time and frequency resources, and determine a mapping relationship between the time and frequency resources at the PDCCH monitoring time and the TTI length.

Specifically, referring to FIG. 21A , the base station may divide the PDCCH monitoring time into a PDCCH monitoring time 1 2110 and a PDCCH monitoring time 2 2120 according to time and frequency resources. At this time, the frequency resource of the PDCCH monitoring time point 1 (2110) does not overlap the frequency resource of the PDCCH monitoring time point 2 (2120), and the time resource of the PDCCH monitoring time point 1 (2110) is the time resource of the PDCCH monitoring time point 2 (2120). It can be set to overlap with

In this case, for example, PDCCH monitoring time 1 2110 may be mapped to 1 subframe TTI, and PDCCH monitoring time 2 2120 may be mapped to 1 slot TTI. Accordingly, the uplink resource allocated at PDCCH monitoring time 1 2110 may have a TTI of 1 subframe length, and the uplink resource allocated at PDCCH monitoring time 2 2120 may have a TTI of 1 slot length. In addition, the above content can be confirmed in the same way in FIG. 21 (b).

However, the embodiment of the present invention is not limited thereto, and various number of PDCCH monitoring time points may be set according to the configuration of the base station, and the length of the TTI may be variously mapped according to the PDCCH monitoring time point.

For example, the base station may use a method of mapping the period of the PDCCH monitoring time point and the length of the TTI, and the terminal may determine the TTI length of the uplink resource according to the period of the PDCCH monitoring time point to which the uplink resource is allocated. .

Accordingly, the UE may determine the length of the TTI of the uplink resource according to the time resource and the frequency resource at the PDCCH monitoring time point to which the uplink resource is allocated.

In addition, the embodiment of the present invention is not limited thereto. As described above, the UE may determine the length of Ta, Tb, or Tc according to the time resource and frequency resource of the PDCCH monitoring time or the period of the PDCCH monitoring time. For example, the length of Ta with respect to the time and frequency resources of each PDCCH monitoring time or the period of the PDCCH monitoring time may be mapped, and the UE may determine Ta according to the PDCCH monitoring time to which the UL resource is allocated. Also, the above method can be applied to determining Tb and Tc.

In addition, as described later, the UE may determine the SCS according to the time and frequency resources of the PDCCH monitoring time or the period of the PDCCH monitoring time.

<Example 4-4>

A radio resource is expressed as a combination of a time axis resource and a frequency axis resource. Here, the resource on the time axis may be equally expressed as a multiple of the symbol length, and the resource on the frequency axis may be equally expressed as a multiple of the subcarrier spacing. Therefore, even if a small amount of time-axis resources are allocated, if a lot of frequency-axis resources are allocated, the amount of radio resources used for transmission and reception increases. In addition, even if a small amount of resources on the frequency axis are allocated, if a lot of resources on the time axis are allocated, the amount of radio resources used for transmission and reception increases.

It is assumed that the UE is allocated a plurality of UL grants at the same time. If the UL grants are processed in the order of increasing the amount of allocated radio resources, the UE can transmit the traffic existing in its buffer to the eNB using as few UL grants as possible. In this case, the UE may reduce UL grant processing overhead.

On the other hand, if the UL grants are processed in the order in which the amount of allocated radio resources is small, the terminal transmits the traffic existing in its buffer to the base station using as many UL grants as possible. In this case, the UE increases the UL grant processing overhead.

The present invention proposes a method of processing the UL grants in the order of the amount of allocated radio resources when the terminal is allocated a plurality of UL grants from the base station. The explanation for this is as follows.

① The UE checks the amount of allocated radio resources after receiving the UL grant.

- Here, the amount of radio resources allocated may be expressed as the number of RBs (Resource Blocks), REs (Resource Elements), or the number of objects corresponding to other basic units of resource allocation.

- Also, the amount of allocated radio resource may be expressed as the number of bits of information that the UE can transmit through the resource.

② The UE processes the UL grant in the order of the largest amount of radio resources checked in step 1.

③ If there are a plurality of UL grants having the same metric derived by the UE in step 2, that is, the amount of resources allocated from the base station, the processing order between them may be determined by another proposed method of the present invention.

In the same principle, when the terminal is allocated a plurality of UL grants from the base station, a method of processing the UL grants in the order of the amount of allocated radio resources is also possible.

<Example 4-5>

The present invention proposes a method of processing the UL grants in an order that the terminal arbitrarily selects when the terminal receives a plurality of UL grants from the base station. An example of this is as follows.

① The UE checks the number of UL grants allocated (or to be processed simultaneously) after receiving the UL grant. If the number of allocated UL grants is N, the UE selects and grants an arbitrary number between 1 and N for each UL grant. In this process, the same number is not assigned to different UL grants.

② The UE processes the UL grants in the order in which the number assigned to each UL grant is small (or large).

<Example 4-6>

The NR system supports multiple subcarrier spacing (SCS). For example, the UL resource allocated to the UE may be used to transmit a signal having one of 15, 30, 60, and 120 kHz SCS. The present invention proposes a method in which the terminal processes the UL grants in the order set based on the SCS when the terminal is allocated a plurality of UL grants from the base station. An example of this is as follows.

① The UE checks the SCS used in the allocated resource after receiving the UL grant.

- The base station may include the SCS in the DCI in order to accurately inform the terminal of the SCS to be used in the UL resource.

- In addition, the DCI specifies the profile ID of the UL resource allocated to the terminal by the base station, and the base station provides a mapping relationship between the profile ID and the SCS through RRC signaling. If so, when receiving the UL grant, the UE may check the profile ID through DCI, and may identify the SCS of the UL resource through the mapping relationship between the profile ID and the SCS.

- In addition, the base station provides a mapping relationship between the DCI format and the SCS through RRC signaling, etc. If so, when receiving the UL grant, the UE may check the DCI format and determine the SCS of the UL resource through the mapping relationship between the DCI format and the SCS.

- In addition, the base station provides a mapping relationship between the bandwidth part to which the UL resource is allocated and the SCS through RRC signaling or the like. If so, when receiving the UL grant, the UE may check the allocated bandwidth part of the UL resource, and may determine the SCS of the UL resource through the mapping relationship between the bandwidth part and the SCS. As a specific method, a method similar to that described with reference to FIG. 18 may be used.

- In addition, the base station provides a mapping relationship between the PDCCH monitoring time point and the SCS through RRC signaling. This is premised on the assumption that the base station allocates a UL resource composed of only one SCS at one PDCCH monitoring time point. If so, the UE can check the PDCCH monitoring time point when receiving the UL grant, and can identify the SCS of the UL resource through the mapping relationship between the PDCCH and the SCS.

- In addition, the base station provides a mapping relationship between the PDCCH monitoring period of the terminal and the SCS through RRC signaling. This is premised on the assumption that the base station allocates a UL resource composed of only one SCS in a PDCCH transmitted at a specific period. If so, when receiving the UL grant, the UE may check the monitoring period of the corresponding PDCCH, and may determine the SCS of the UL resource through the mapping relationship between the PDCCH and the SCS.

- In addition, the base station provides a mapping relationship between the PDCCH monitoring time or frequency resource and the SCS through RRC signaling or the like. This is premised on the premise that the base station allocates a UL resource composed of only one SCS in one PDCCH monitoring time or frequency resource. If so, the UE may check the PDCCH monitoring time and frequency resource when receiving the UL grant, and may determine the SCS of the UL resource through a mapping relationship between the PDCCH monitoring time and the SCS.

A method similar to that described with reference to FIGS. 19 to 21 may be used as a PDCCH monitoring time point or a method of using a time or frequency resource at the monitoring time point.

① The UE processes UL grants in the order of the smallest SCS used in the UL resource identified in step 1. As another example, the UE may process the UL grant in the order of increasing the SCS used in the UL resource. As another example, the UE may process the UL grant in the SCS order notified by the base station through RRC signaling or the like.

② If there are a plurality of UL grants having the same metric derived by the UE in step 1, that is, the SCS used in the allocated UL resource, the processing order between them may be determined by another proposed method of the present invention.

<Example 4-7>

In the NR system, the UE may have been configured by the base station to monitor one or more time and frequency resources in order to receive the PDCCH, which is a control channel including UL resource allocation information, and the like. Specific details will be described with reference to FIG. 22 .

22 is a diagram illustrating an example in which different PDCCH monitoring time and frequency resources are set in different bandwidth parts according to an embodiment of the present invention.

Referring to FIG. 22 , if a plurality of PDCCH monitoring resources are periodically configured for the terminal, the terminal may need to monitor a plurality of PDCCHs at a specific time. Specifically, the base station may divide the system bandwidth into bandwidth parts, and set the PDCCH monitoring time point at different periods according to the bandwidth part. At this time, if one or more PDCCHs include resource allocation information for the corresponding UE, the UE must determine which PDCCH contains the UL grant to be processed first.

The present invention proposes a method for the terminal to process the UL grant according to the period of the PDCCH monitoring time and frequency resource when the terminal is allocated a plurality of UL grants from the base station. The explanation for this is as follows.

① After receiving the UL grant, the UE checks the PDCCH monitoring time and frequency resource period for detecting the UL grant. In this case, the base station may provide information on the period of the allocated resource when allocating the PDCCH monitoring time and frequency resource to the terminal through RRC signaling or the like.

② The UE processes the UL grant in the order of the shortest period of the PDCCH monitoring resource identified in step 1. As another example, the UE may process the UL grant in the order of the longest period of the PDCCH monitoring resource for detecting the UL grant.

③ If there are a plurality of UL grants having the same metric derived by the UE in step 1, that is, the period of the PDCCH monitoring resource for detecting the UL grant, the processing order between them may be determined by another proposed method of the present invention.

22 as an example, the period of the PDCCH monitoring resource 2215 of the bandwidth part 1 2210 is the longest, and the period of the PDCCH monitoring resource 2235 of the bandwidth part 3 2230 is the shortest. Therefore, according to an embodiment of the present invention, the terminal may process the control information received through the PDCCH monitoring resource of bandwidth part 1 2210 the latest. Alternatively, according to another embodiment of the present invention, the terminal may first process the control information received through the PDCCH monitoring resource of bandwidth part 1 (2210).

<Example 4-8>

The NR system is designed to operate in a plurality of frequency bands having different propagation characteristics. For example, the frequency band below 6 GHz in which the 2G/3G/4G system operates and the frequency band above 6 GHz in which transmission/reception beamforming is required due to large propagation loss, for example, the 28 GHz frequency band I'm considering working on all of them.

Here, each frequency band may have different characteristics. For example, a frequency band of 6 GHz or higher has a wider bandwidth compared to a frequency band of 6 GHz or less, which is advantageous for transmitting large amounts of data. In addition, power consumption of the RF module supporting a frequency band of 6 GHz or less may be different from that of the RF module supporting a frequency band of 6 GHz or more.

Therefore, when the UE is allocated a plurality of UL grants, the UL grant processing order may be determined based on the frequency to which the allocated UL resources belong. The explanation for this is as follows.

① After receiving the UL grant, the UE checks a frequency band including resources allocated through the UL grant, that is, a carrier frequency or a component carrier.

② The UE processes the UL grant in the order of the lowest carrier frequency identified in step 1.

- However, as another example, the UE may process the UL grant in the order of the highest carrier frequency of the allocated UL resource.

- As another example, the UE may process the UL grant in the order of carrier frequencies notified by the base station through RRC signaling or the like.

- As another example, the UE may first process the UL grant allocated through the component carrier configured as the primary cell (PCell), and then process the UL grant allocated through the component carrier configured as the secondary cell (SCell) later.

- As another example, the UE may first process the UL grant allocated to the component carrier of the primary cell (PCell), and then process the UL grant allocated to the component carrier of the secondary cell (SCell) later.

③ If there is a metric derived by the UE in step 1, that is, a plurality of UL grants allocated through the same frequency band, the processing order between them may be determined by another proposed method of the present invention.

<Example 4-9>

In the NR system, the UE can use a plurality of services having different characteristics at the same time. For example, the UE may use both a logical channel for an eMBB service requiring high throughput and a logical channel for a URLLC service requiring low delay and high reliability. In this case, when traffic to be transmitted in the logical channel for eMBB or logical channel for URLLC occurs, the terminal may transmit a scheduling request signal to the base station according to a scheduling request procedure. If the base station receives the scheduling request signal from the terminal, the base station may allocate a UL grant to the terminal to provide the terminal with an opportunity to transmit the generated traffic.

Here, when the terminal receives the UL grant, it should be able to determine in which logical channel traffic generated by using the allocated UL grant should be transmitted. This is because the characteristics of the UL grant suitable for transmitting traffic belonging to each service used by the UE may be different from each other.

For example, when the UE transmits traffic generated in the logical channel for eMBB, it is appropriate to use a UL grant with 15 kHz SCS and 0.5 ms TTI. When transmitting traffic generated in the logical channel for URLLC, 30 kHz SCS and 0.25 ms TTI are used. It may be appropriate to use a UL grant with If the UE uses a UL grant suitable for eMBB traffic transmission, that is, a UL resource composed of 15 kHz SCS and 0.5 ms TTI to transmit traffic generated in the logical channel for URLLC, it may not satisfy the requirements of the URLLC service.

Therefore, in the present invention, when the terminal is allocated a UL grant from the base station, a method of identifying the physical characteristics of the allocated UL grant by the terminal and a method of identifying a logical channel that can be transmitted through the allocated UL grant are proposed.

First, the UE may identify the physical characteristics of the allocated UL grant, for example, the SCS and TTI length, and identify a logical channel suitable for transmission through a resource having the corresponding physical characteristics. A detailed description of the terminal according to this method is shown in FIG. 23 .

23 is a diagram for explaining a method for a terminal to identify a physical characteristic of a UL grant after receiving a UL grant and then select an LCH that can be transmitted through an allocated UL grant according to an embodiment of the present invention.

Referring to FIG. 23 , the UE may receive a UL grant in step S2310. And, the UE may check the physical characteristic information of the UL grant in step S2320. In this case, the physical property information of the UL grant may include the aforementioned SCS and TTI lengths. In addition, the physical characteristic information of the UL grant may include at least one of the previously described physical characteristic information.

In addition, the terminal may select an LCH based on the physical characteristic information in step S2330.

In this case, various methods may be used for the UE to check the physical characteristic information of the UL grant and select an LCH according to the characteristic information, and the detailed method is as follows.

● Method A1

- The terminal may use method A1 in step S2311. - Method A1 is specifically, a method of transmitting to the terminal by including the SCS and TTI length in DCI so that the base station can identify the physical characteristic information of the UL grant. An example of this is shown in Table 10 below. Therefore, when the UE receives the UL grant, the UE can determine the SCS and TTI length of the allocated resource.

[Table 10]

- In addition, the base station informs the terminal of a list of logical channels that can be transmitted through a resource configured with a specific SCS and TTI length. Such information may be transmitted through RRC signaling or the like. An example of this is shown in Table 11 below.

[Table 11]

- Therefore, the terminal identifies the physical characteristic information (SCS and TTI length) of the allocated UL grant through the information specified in DCI, and uses the UL grant with the corresponding physical characteristic through RRC signaling, etc. A logical channel that can be transmitted choose Then, after performing a logical channel prioritization (LCP) operation for the selected logical channel, UL transmission is performed.

- Although this method has the advantage that it can be implemented relatively simply by directly adding information about the SCS and TTI length to the DCI, the information to be included in the DCI may increase.

● Method A2

- The terminal may use method A2.

Specifically, the UE checks the bandwidth part to which the UL resource allocated in step S2312 belongs.

- The base station uses one physical characteristic within a specific bandwidth part, for example, one SCS and one TTI length, and informs the terminal of information about this through RRC signaling. An example of this is shown in Table 12 below. Therefore, the UE can check the physical characteristics corresponding to the corresponding bandwidth part.

[Table 12]

- And, the base station informs the terminal of a list of logical channels that can be transmitted through a resource composed of specific physical characteristic information (eg, SCS and TTI length). Such information may be transmitted through RRC signaling or the like. An example of this is shown in Table 13 below.

[Table 13]

- The UE identifies the physical characteristic information (eg, SCS and TTI length) of the allocated UL grant through bandwidth part information to which the allocated UL resource belongs, and uses the UL grant having the corresponding physical characteristic through RRC signaling, etc. to select a logical channel that can be transmitted. Then, after performing a logical channel prioritization (LCP) operation for the selected logical channel, UL transmission is performed.

● Method A3

- The terminal may use method A3.

Specifically, the UE checks the time and frequency resources of the PDCCH to which the UL grant is allocated or the PDCCH monitoring time in step S2313.

- The base station uses one physical characteristic, for example, one SCS and one TTI length, for a PDCCH of a specific time and frequency resource or a UL resource allocated at a specific PDCCH monitoring time, and transmits this information to the UE through RRC signaling, etc. let me know An example of this is shown in Table 14 below. Accordingly, the UE may check the PDCCH of a specific time and frequency resource or a physical characteristic of a UL resource corresponding to a specific PDCCH monitoring time point.

[Table 14]

- And, the base station informs the terminal of a list of logical channels that can be transmitted through a resource composed of specific physical characteristic information (eg, SCS and TTI length). Such information may be transmitted through RRC signaling or the like. An example of this is shown in Table 15 below.

[Table 15]

- The UE identifies the physical characteristic information (eg, SCS and TTI length) of the allocated UL grant through time and frequency resources of the PDCCH to which the UL grant is transmitted or PDCCH monitoring time information, and the corresponding physical property through RRC signaling, etc. A logical channel that can be transmitted is selected using a UL grant with characteristics. Then, after performing a logical channel prioritization (LCP) operation for the selected logical channel, UL transmission is performed.

● Method A4

- The terminal may use method A4.

Specifically, the terminal checks the DCI format used for UL resource allocation of the base station in step S2314.

- The base station uses one physical characteristic, for example, one SCS and one TTI length, for a UL resource allocated through a specific DCI format, and informs the terminal of this information through RRC signaling. An example of this is shown in Table 16 below. Accordingly, the UE can check the physical characteristics of the UL resource corresponding to the DCI format.

[Table 16]

- And, the base station informs the terminal of a list of logical channels that can be transmitted through a resource composed of specific physical characteristic information (eg, SCS and TTI length). Such information may be transmitted through RRC signaling or the like. An example of this is shown in Table 17 below.

[Table 17]

The UE identifies the physical characteristic information (eg, SCS and TTI length) of the UL grant allocated through the DCI format used for UL resource allocation, and uses the UL grant having the corresponding physical characteristic through RRC signaling, etc. Select a logical channel that can be transmitted. Then, after performing a logical channel prioritization (LCP) operation for the selected logical channel, UL transmission is performed.

As such, in the case of method A2/A3/A4, it is composed of one bandwidth part, one PDCCH time and frequency resource (or one PDCCH monitoring time), and physical characteristic information (SCS and TTI length) predetermined through one DCI format. There is a constraint that UL resources must be allocated. However, there is an advantage in that the number of bits included in the DCI does not increase because it is not necessary to directly add information on the SCS and TTI length, etc. to the DCI as in method A1.

So far, a method of selecting a logical channel suitable for transmission through a UL grant having the corresponding physical characteristics in a second step has been proposed by the UE going through two steps, that is, in step 1, identifying the physical characteristics of the allocated UL grant.

Next, instead of performing two steps, the UE proposes a method of selecting a logical channel suitable for transmission through an allocated UL grant by performing only one step. A detailed operation of the terminal according to this method will be described with reference to FIG. 24 .

24 is a diagram for explaining a method for a terminal to select an LCH that can be transmitted through a UL grant after receiving a UL grant according to an embodiment of the present invention.

Referring to FIG. 24 , the UE may receive a UL grant in step S2410. And, the terminal may select the LCH in step S2420.

At this time, various methods may be used for the UE to receive the UL grant and select the LCH, and the detailed method is as follows.

● Method B1

- The terminal may use method B1 in step S2411

- Method B1 is specifically, in order for the base station to inform the terminal of the LCH that can be transmitted through the corresponding UL grant, the DCI includes a list of LCH IDs that can be transmitted through the corresponding UL grant and transmits to the terminal. An example of this is shown in Table 18 below. Therefore, when the UE receives the UL grant, it can determine the LCH that can be transmitted through the UL grant.

[Table 18]

- Therefore, the UE identifies a transmittable LCH through the UL grant allocated through the information included in the DCI, performs an LCP operation on it, and then performs UL transmission.

- Although this method has the advantage of being relatively simple to implement by directly adding transmittable LCH information to the DCI, the information to be included in the DCI increases.

● Method B1'

- Alternatively, the terminal may use method B1'.

Method B1' is a method of transmitting to the UE by including the ID of the LCH set transmittable through the UL grant in DCI in order for the base station to inform the UE of the LCH that can be transmitted through the corresponding UL grant. An example of this is shown in Table 19 below. Here, the base station may inform the terminal of RRC signaling of the LCH group constituting the LCH set.

[Table 19]

- As described above, the base station may inform the terminal of the LCH list belonging to each LCH set. Such information may be transmitted through RRC signaling or the like. Specifically, each LCH set may be identified by an identifier, and the base station may provide the identifier of the LCH set and the LCH list included in the set corresponding to the identifier to the terminal through RRC signaling or the like. An example of this is shown in Table 20 below.

[Table 20]

- Accordingly, the UE can confirm the ID of the LCH set that can be transmitted through the UL grant allocated based on the information included in the DCI. And, the UE checks the LCH set corresponding to the LCH set ID included in the UL grant through RRC signaling or the like. And, after performing the LCP operation on the logical channel confirmed in this way, UL transmission is performed.

- This method has an advantage in that the information to be included in DCI is reduced compared to directly including the LCH list in DCI.

● Method B2

- The terminal may use method B2.

Specifically, the UE checks the bandwidth part to which the UL resource allocated in step S2412 belongs.

- The base station notifies the terminal of information about the LCH list that can be transmitted and received within a specific bandwidth part through RRC signaling, etc. An example of this is shown in Table 21 below.

[Table 21]

- The UE confirms the LCH that can be transmitted through the allocated UL grant through information on the bandwidth part to which the allocated UL resource belongs and correspondence information between the bandwidth part and the LCH provided through RRC signaling, etc. Then, after performing an LCP operation on the checked LCH, UL transmission is performed.

● Method B3

- The terminal may use method B3.

Specifically, the terminal checks the time and frequency resources of the PDCCH to which the UL grant is allocated or the PDCCH monitoring time in step S2413.

- The base station notifies the terminal of information about the LCH list that can be transmitted/received through the PDCCH of a specific time and frequency resource or the UL resource allocated at the specific PDCCH monitoring time point through RRC signaling or the like. An example of this is shown in Table 22 below.

[Table 22]

The UE identifies a logical channel that can be transmitted using the allocated UL grant through time and frequency resources of the PDCCH through which the UL grant is transmitted, or LCH information provided through PDCCH monitoring occasion information and RRC signaling, etc. Then, after performing a logical channel prioritization (LCP) operation for the logical channel checked in this way, UL transmission is performed.

● Method B4

- The terminal may use method B4.

Specifically, the terminal checks the DCI format used for UL resource allocation of the base station in step S2414.

- The base station notifies the terminal of LCH information that can be transmitted through a UL resource allocated through a specific DCI format through RRC signaling, etc. An example of this is shown in Table 23 below.

[Table 23]

- The UE checks the logical channel that can be transmitted using the UL grant allocated through the DCI format used for UL resource allocation and the LCH information that can be transmitted using the resources allocated through each DCI format. Then, after performing a logical channel prioritization (LCP) operation for the logical channel checked in this way, UL transmission is performed.

As such, in the case of method B2/B3/B4, there is a restriction that a predetermined LCH must be transmitted/received through one bandwidth part, one PDCCH time and frequency resource (or one PDCCH monitoring time), and one DCI format. However, since there is no need to directly add LCH-related information to DCI as in method B1, there is an advantage in that the number of bits included in DCI is not increased.

So far, the present invention has proposed a method for determining the SCS and TTI length of the UL resource allocated to the UE. However, the method proposed in the present invention can be used in the same principle to determine not only the SCS and TTI lengths but also various parameters, for example, CP length and transmission duration.

Also, in the present invention, an example of a method for the UE to check the SCS and TTI lengths in pairs has been described. However, the UE may check the SCS by a specific method and independently check the TTI length in a method different from the method of determining the SCS.

For example, the terminal uses one of the methods A1, method A2, method A3, and method A4 described above to determine the SCS, and the method B1, method B2, method B3, and method described above in order for the terminal to determine the TTI length You can also use one of B4. In this example, a case in which the terminal identifies the SCS and TTI length has been described, but the present invention is not limited thereto and can be applied to find a combination of various parameters. For example, the method proposed in the present invention may be used to find a combination of SCS and transmission duration.

In addition, the contents of FIGS. 23 and 24 may be applied to the entire contents of the present invention, for example, a method of determining a parameter for determining the processing order of a UL grant, etc. may be applied.

<Fifth embodiment>

Meanwhile, a general UL scheduling procedure is as follows.

1) The base station allocates a resource for transmitting a scheduling request (SR) to the terminal, that is, PUCCH.

2) The terminal transmits the SR to the base station when traffic to be transmitted occurs according to a predefined Buffer Status Report (BR) and SR procedure.

3) After receiving the SR, the base station allocates a resource for transmitting data to the terminal, that is, the PUSCH.

4) The terminal transmits data through the resources allocated from the base station.

In the 5G system or the NR system, a grant-free (GF) transmission method is introduced along with this general UL scheduling procedure. The GF transmission procedure is as follows.

1) The base station allocates resources to transmit data to the terminal. This can be seen as an operation similar to SPS (Semi-Persistent Scheduling), in which the base station allocates resources to the terminal in advance before traffic occurs, rather than the base station allocates resources to the terminal when traffic occurs, as in general UL scheduling. .

A. There may be the following methods for the base station to allocate resources for GF transmission to the terminal.

i) The base station notifies the terminal of the GF transmission resource through RRC configuration or the like.

ii) The base station notifies the UE of the GF transmission resource candidate through RRC configuration, etc. and informs the actual GF transmission available resource through L1 signaling such as PDCCH.

B. In addition, information notified when the base station allocates GF resources to the terminal may include the following.

i) Periodicity and offset of a resource with respect to SFN = 0

ii) Time domain resource allocation

iii) Frequency domain resource allocation

iv) UE-specific DMRS configuration

ⅴ) An MCS/TBS value

ⅵ) Number of repetitions K

ⅶ) Power control related parameters

viii) HARQ related parameters

ⅸ) Offset associated with the periodicity with respect to a timing reference indicated by L1 signaling for activation

2) The terminal allocated with the resource for GF transmission in step 1 can perform transmission through the resource when traffic occurs.

The advantage of this GF transmission method is that the time it takes for the terminal to transmit the SR to the base station, the time it takes for the terminal to receive the UL grant from the base station, and the related processing time can be reduced. Therefore, in general, when a terminal using a plurality of services is allocated a UL resource for GF transmission from a base station, it is a traffic that requires a low delay such as URLLC rather than traffic that allows a long delay such as eMBB among the services used by the terminal. It can be seen that transmission is advantageous.

The GF transmission method has a feature that the same GF transmission resource can be allocated to a plurality of terminals in addition to having a lower delay compared to general UL scheduling. When the base station allocates a GF transmission resource to the terminal, a demodulation reference signal (DM-RS) set exclusively for a specific terminal together with time and frequency resource information, MCS, HARQ, and power control information of the GF resource is set ( configuration) is reported.

Here, the base station may allocate the same GF transmission resource to a plurality of terminals and allocate different DMRS configurations to each terminal. If so, even if a plurality of terminals perform transmission on the same resource, the base station can determine which terminal performed the transmission through the characteristics of the received DM-RS. In addition, through this, the base station may improve data reception performance or instruct retransmission. Here, whether the base station can successfully receive data when a plurality of terminals perform transmission on the same resource depends on the performance of the physical layer. That is, according to the detailed design of the physical layer for GF transmission, when a plurality of terminals perform transmission on the same resource, the base station may or may not successfully receive data.

So far, the characteristics of the following GF transport methods have been investigated.

(1) Avoidance of delay required for SR and UL grant transmission and reception

(2) It is possible to allocate the same GF transmission resource to a plurality of terminals

(3) Depending on the detailed design of the physical layer for GF transmission, transmission/reception performance may be degraded

Here, it is assumed that a terminal is simultaneously using a plurality of services, for example, eMBB and URLLC. According to the characteristic (1) described above, it is advantageous for the terminal to transmit URLLC data requiring a low delay when the GF transmission resource is allocated from the base station.

However, according to characteristic (2), the GF transmission resource allocated to the terminal may have been allocated not only to the terminal but also to other terminals. Also, according to characteristic (3), if a plurality of terminals perform GF transmission on the same resource, the data reception performance of the base station may be deteriorated. In this case, it is not suitable for the terminal to transmit URLLC data to the GF resource allocated from the base station. This is because it may not satisfy the requirements in terms of reliability of URLLC service, that is, error rate and delay.

Therefore, the present invention proposes the operation shown in FIG. 25 as follows.

25 is a diagram illustrating a method for transmitting uplink data according to an embodiment of the present invention.

The base station provides logical channel configuration information for each logical channel to the terminal in step S2510. This may be performed through RRC signaling.

The logical channel configuration information of the present invention may include at least one of the following information.

1) Whether traffic belonging to the logical channel can be transmitted through the GF transmission resource (named GrantFreeAllowed)

2) Whether traffic belonging to the logical channel can be transmitted through the GF transmission resource allocated to only one terminal (named GrantFreeDedicatedAllowed)

3) Whether traffic belonging to the corresponding logical channel can be transmitted through the GF transmission resources allocated to multiple terminals (named GrantFreeSharedAllowed)

Then, the base station allocates a GF transmission resource to the terminal in step S2520. The GF transmission resource may be included in grant-free resource configuration information, which may be transmitted to the UE through RRC signaling.

The grant free resource configuration information for allocating the GF transmission resource of the present invention may include at least one of the following information.

1) Whether the corresponding GF transmission resource is allocated to only one terminal or to a plurality of terminals (named GrantFreeShared)

2) The number of terminals allocated the corresponding GF transmission resource (named NumGrantFreeShared)

The UE obtained an opportunity to perform UL transmission through the GF transmission resource allocated from the base station.

Accordingly, the terminal may check the grant-free resource in step S2530.

Then, the terminal may check the allowed logical channel in step S2540. The terminal selects a logical channel to be transmitted through the GF transmission resource based on the information confirmed through the logical channel configuration and the information confirmed through the grant free resource configuration.

A. If GrantFreeShared or NumGrantFreeShared information is not given in step S2520, the terminal selects the GrantFreeAllowed logical channel identified in step S2530.

B. If GrantFreeShared information or NumGrantFreeShared information is given in step S2520, the terminal operates as follows.

i) If GrantFreeShared identified in step S2520 is True (this means that the GF transmission resource is shared among multiple terminals) or NumGrantFreeShared is greater than 1, the terminal selects the GrantFreeAllowed or GrantFreeSharedAllowed logical channel identified in step 1.

ii) If GrantFreeShared identified in step S2520 is False (this means that the GF transmission resource is allocated to only one terminal) or NumGrantFreeShared is 1, the terminal selects the GrantFreeDedicatedAllowed logical channel identified in step 1.

The UE performs an LCP operation on the logical channel selected in step S2550. Then, the terminal transmits the packet generated through the LCP operation in step S2560 through the GF transmission resource.

In addition, the present invention proposes the operation shown in Fig. 26] as follows.

26 is a diagram illustrating another method for transmitting uplink data according to an embodiment of the present invention.

The base station provides logical channel configuration information for each logical channel to the terminal in step S2610. This may be performed through RRC signaling.

Then, the base station allocates a GF transmission resource to the terminal in step S820. The GF transmission resource may be included in grant-free resource configuration information, which may be transmitted to the UE through RRC signaling.

A. In the present invention, grant free resource configuration information for allocating GF transmission resources may include at least one of the following information.

1) Whether the corresponding GF transmission resource is allocated to only one terminal or to a plurality of terminals (named GrantFreeShared)

2) The number of terminals allocated the corresponding GF transmission resource (named NumGrantFreeShared)

B. In the present invention, the following will be included in grant free resource configuration information for allocating GF transmission resources.

1) LCH list that can be transmitted through the corresponding GF transmission resource

2) LCH list that can be transmitted when the corresponding GF transmission resource is allocated to only one terminal

3) LCH list that can be transmitted when the corresponding GF transmission resource is allocated to a plurality of terminals

The UE obtained an opportunity to perform UL transmission through the GF transmission resource allocated from the base station.

Accordingly, the terminal may check the grant-free resource in step S2630.

Then, the terminal may check the allowed logical channel in step S2640. The terminal selects a logical channel to transmit based on the information confirmed in the grant free resource configuration.

A. If GrantFreeShared information or NumGrantFreeShared information is not given, the UE selects an LCH included in the LCH list that can be transmitted through the corresponding GF transmission resource.

B. If GrantFreeShared information or NumGrantFreeShared information is given, the terminal operates as follows.

i) If GrantFreeShared is True (this means that the corresponding GF transmission resource is shared to a plurality of terminals) or NumGrantFreeShared is greater than 1, the terminal is a list of LCHs that can be transmitted when the corresponding GF transmission resource is allocated to a plurality of terminals Select the LCH included in .

ii) If GrantFreeShared is False (this means that the GF transmission resource is allocated to only one UE) or NumGrantFreeShared is 1, the UE is included in the LCH list that can be transmitted when the GF transmission resource is allocated to only one UE. Select LCH.

The UE performs LCP operation on the logical channel selected in step S2650. Then, the UE transmits the packet generated through the LCP operation in step S2660 through the GF transmission resource.

In addition, the present invention proposes the operation shown in FIG. 27 as follows.

27 is a diagram illustrating another method for transmitting uplink data according to an embodiment of the present invention.

The base station provides logical channel configuration information for each logical channel to the terminal in step S2710. This may be performed through RRC signaling.

In the present invention, logical channel configuration information may include at least one of the following information.

1) Whether traffic belonging to the logical channel can be transmitted through the GF transmission resource (named GrantFreeAllowed)

2) Whether traffic belonging to the corresponding logical channel can be transmitted through the GF transmission resource allocated to only one terminal (named GrantFreeDedicatedAllowed)

3) Whether traffic belonging to the corresponding logical channel can be transmitted through the GF transmission resources allocated to multiple terminals (named GrantFreeSharedAllowed)

Then, the base station allocates a GF transmission resource to the terminal in step S2720. The GF transmission resource may be included in grant-free resource configuration information, which may be transmitted to the UE through RRC signaling.

A. In addition, in the present invention, grant free resource configuration information for allocating GF transmission resources may include at least one of the following information.

1) LCH list that can be transmitted through the corresponding GF transmission resource

2) LCH list that can be transmitted when the corresponding GF transmission resource is allocated to only one terminal

3) LCH list that can be transmitted when the corresponding GF transmission resource is allocated to a plurality of terminals

B. Here, the information included in step S2710 and the information included in step S2720 represent the same information. Therefore, the present invention can operate even if only one of the two is included. In this example, it is assumed that the corresponding information is transmitted in step S2710.

The base station activates the GF transmission resource allocated to the terminal in step S2730. This may be performed through L1 signaling such as DCI.

In the present invention, the base station may include at least one of the following information in DCI for activating the GF transmission resource.

1) Whether only one terminal or a plurality of terminals are allocated to the activated GF transmission resource

2) The number of terminals allocated to the activated GF transmission resource

Accordingly, the terminal may check the grant-free resource in step S2740.

Then, the terminal may check the allowed logical channel in step S2750. The terminal selects a logical channel to be transmitted through the GF transmission resource based on the information confirmed through the logical channel configuration and the information confirmed through the DCI for activating the GF transmission resource.

A. If information such as whether only one UE is allocated to the GF transmission resource activated in step S2730 or whether a plurality of UEs are allocated or the number of UEs allocated to the activated GF transmission resource is not provided, the UE performs step S2710 Select the logical channel identified in GrantFreeAllowed.

B. If this information is given in step S2730, the terminal operates as follows.

i) If a plurality of terminals are allocated to the activated GF transmission resource, the terminal selects the GrantFreeAllowed or GrantFreeSharedAllowed logical channel identified in step 1.

ii) If only one UE is allocated to the activated GF transmission resource, the UE selects the GrantFreeDedicatedAllowed logical channel identified in step 1.

The terminal performs an LCP operation on the logical channel selected in step S2760. Then, the UE transmits the packet generated through the LCP operation in step S2770 through the GF transmission resource.

In addition, the present invention proposes the operation shown in FIG. 28 as follows.

28 is a diagram illustrating another method for transmitting uplink data according to an embodiment of the present invention.

The base station provides logical channel configuration information for each logical channel to the terminal in step S2810. This may be performed through RRC signaling.

The logical channel configuration information of the present invention may include the following.

1) Profile ID corresponding to each logical channel

The base station allocates a GF transmission resource to the terminal in step S2820. The GF transmission resource may be included in grant-free resource configuration information, which may be transmitted to the UE through RRC signaling.

The base station activates the GF transmission resource allocated to the terminal in step S2830. This may be performed through L1 signaling such as DCI.

In the present invention, the following information may be included in DCI for the base station to activate the GF transmission resource.

1) Profile ID of the activated GF transmission resource

Accordingly, the terminal may check the grant-free resource in step S2840.

Then, the terminal may check the allowed logical channel in step S2850. The terminal selects a logical channel to transmit through the GF transmission resource based on the information confirmed through the logical channel configuration and the information confirmed through the DCI for activating the GF transmission resource.

A. That is, when the terminal checks the activated profile ID through the DCI received in step S2830, it selects a logical channel corresponding to the profile ID through the logical channel configuration received in step S2810.

The UE performs LCP operation on the logical channel selected in step S2860. Then, the terminal transmits the packet generated through the LCP operation in step S2870 through the GF transmission resource.

Since the operations described with reference to FIGS. 25 to 28 correspond to examples of the method proposed in the present invention, a combination thereof can also be considered to be included in the scope of the present invention.

25, 26, 27, and 28 illustrate the operations of the base station and the terminal with respect to the GF transmission resources allocated to the terminal by the base station. This operation may be equally applied to the SPS resource allocated to the terminal by the base station. An example of this is as follows.

1. The base station provides logical channel configuration information for each logical channel to the terminal. This is performed through RRC signaling.

A. In the present invention, logical channel configuration information may include the following information.

1) Whether traffic belonging to the logical channel can be transmitted through the SPS resource (named SPSAllowed)

2. The base station allocates SPS resources to the terminal. This is performed through RRC signaling.

3. The UE obtained an opportunity to perform UL transmission through the SPS resource allocated from the base station.

4. The terminal selects a logical channel to be transmitted through the SPS resource using the information identified through the logical channel configuration in step 1.

A. For this purpose, the UE selects the logical channel for which SPSAallowed is True as described in step 1 and does not select the logical channel for which SPSAallowed is False.

5. The terminal performs LCP operation on the logical channel selected in step 4.

6. The UE transmits the packet generated through the LCP operation through the SPS resource.

Another example related to this is as follows.

1. The base station provides logical channel configuration information for each logical channel to the terminal. This is performed through RRC signaling.

2. The base station allocates SPS resources to the terminal. This is performed through RRC signaling.

A. In the present invention, SPS resource configuration information for allocating SPS resources includes the following.

1) LCH list that can be transmitted through the corresponding SPS resource

3. The UE obtained an opportunity to perform UL transmission through the SPS resource allocated from the base station.

4. The terminal selects a logical channel to be transmitted through the SPS resource using the information identified through the SPS resource configuration in step 2.

A. For this, the terminal selects a logical channel included in the LCH list that can be transmitted through the corresponding SPS resource described in step 2, and does not select a logical channel that is not.

5. The terminal performs LCP operation on the logical channel selected in step 4.

6. The UE transmits the packet generated through the LCP operation through the SPS resource.

29 is a diagram illustrating the structure of a terminal according to an embodiment of the present invention.

Referring to FIG. 29 , the terminal may include a transceiver 2910 , a controller 2920 , and a storage 2930 . In the present invention, the controller may be defined as a circuit or an application specific integrated circuit or at least one processor.

The transceiver 2910 may transmit/receive a signal. The transceiver 2910 may receive, for example, system information from a base station, and may receive a synchronization signal or a reference signal.

The controller 2920 may control the overall operation of the terminal according to the embodiment proposed in the present invention. For example, the controller 2920 may control a signal flow between blocks to perform an operation according to the above-described flowchart.

For example, the controller 2920 may receive LCH-profile mapping information from the base station and receive a UL grant.

Accordingly, the controller 2920 may select data to be transmitted to the base station based on the profile information included in the UL grant.

Alternatively, the controller 2920 may receive information on the parameter set from the base station and select data to be transmitted to the base station based on the parameter set information and profile information included in the UL grant.

Also, the controller 2920 may check the profile information using the various methods described above.

The storage unit 2930 may store at least one of information transmitted and received through the transceiver 2910 and information generated through the control unit 2920 .

30 is a diagram illustrating a structure of a base station according to an embodiment of the present invention.

Referring to FIG. 30 , the base station may include a transceiver 3010 , a controller 3020 , and a storage 3030 . In the present invention, the controller may be defined as a circuit or an application specific integrated circuit or at least one processor.

The transceiver 3010 may transmit/receive a signal. The transceiver 3010 may transmit, for example, system information to the terminal, and may transmit a synchronization signal or a reference signal.

The controller 3020 may control the overall operation of the base station according to the embodiment proposed in the present invention. For example, the controller 3020 may control a signal flow between blocks to perform an operation according to the above-described flowchart.

For example, the controller 3020 may transmit LCH-profile mapping information to the UE and transmit a UL grant.

Accordingly, the controller 3020 may receive data determined based on the profile information included in the UL grant from the terminal.

Alternatively, the controller 3020 may transmit information on the parameter set to the terminal and receive data selected based on the information on the parameter set and profile information included in the UL grant.

Also, the controller 3020 may transmit the profile information to the terminal using the various methods described above.

The storage unit 3030 may store at least one of information transmitted and received through the transceiver 3010 and information generated through the control unit 3020 .

In addition, the embodiments disclosed in the present specification and drawings are merely provided for specific examples to easily explain and help understanding of the contents of the present invention, and are not intended to limit the scope of the present invention. Accordingly, the scope of the present invention should be construed as including all changes or modifications derived from the technical spirit of the present invention in addition to the embodiments disclosed herein as being included in the scope of the present invention.

Claims (16)

A method performed by a terminal in a wireless communication system, the method comprising:
Receiving a message including logical channel configuration information from the base station through radio resource control (RRC) signaling, wherein the logical channel configuration information includes information about a first logical channel related to an error rate and information about a second logical channel related to throughput includes;
receiving an uplink grant from the base station, wherein the uplink grant includes a modulation and coding scheme (MCS) and information indicating whether the MCS is related to the error rate or the throughput;
identifying a logical channel corresponding to the information among the first logical channel and the second logical channel;
allocating resources included in the uplink grant to the identified logical channel; and
and transmitting data corresponding to the identified logical channel to the base station based on the resources. According to claim 1,
The data corresponding to the first logical channel includes low latency communication (URLLC),
The data corresponding to the second logical channel comprises enhanced mobile broadband (eMBB) data. According to claim 1,
The length of the information is 1 bit,
The method of claim 1, wherein the logical channel configuration information includes priority information for logical channels. According to claim 1,
When it is indicated by the information that the MCS is related to the error rate, data corresponding to the first logical channel is transmitted based on the resources,
When it is indicated by the information that the MCS is related to the throughput, data corresponding to the second logical channel is transmitted based on the resources. A method performed by a base station in a wireless communication system, comprising:
Transmitting a message including logical channel configuration information to the terminal through radio resource control (RRC) signaling, wherein the logical channel configuration information includes information on a first logical channel related to an error rate and information on a second logical channel related to throughput includes;
transmitting an uplink grant to the terminal, wherein the uplink grant includes a modulation and coding scheme (MCS) and information indicating whether the MCS is related to the error rate or the throughput;
and receiving data through resources allocated to a logical channel corresponding to the information among the first logical channel or the second logical channel. 6. The method of claim 5,
The data corresponding to the first logical channel includes low latency communication (URLLC),
The data corresponding to the second logical channel comprises enhanced mobile broadband (eMBB) data. 6. The method of claim 5,
The length of the information is 1 bit,
The method of claim 1, wherein the logical channel configuration information includes priority information for logical channels. 6. The method of claim 5,
When it is indicated by the information that the MCS is related to the error rate, data corresponding to the first logical channel is received based on the resources;
When it is indicated by the information that the MCS is related to the throughput, data corresponding to the second logical channel is received based on the resources. In a terminal in a wireless communication system,
transceiver; and
connected to the transceiver,
A message including logical channel configuration information is received from the base station through radio resource control (RRC) signaling, and the logical channel configuration information includes information about a first logical channel related to an error rate and information about a second logical channel related to throughput. includes,
Receive an uplink grant from the base station, wherein the uplink grant includes a modulation and coding scheme (MCS) and information indicating whether the MCS is related to the error rate or the throughput,
check a logical channel corresponding to the information among the first logical channel and the second logical channel;
Allocating resources included in the uplink grant to the identified logical channel;
and a control unit for transmitting data corresponding to the identified logical channel to the base station based on the resources. 10. The method of claim 9,
The data corresponding to the first logical channel includes low latency communication (URLLC),
The data corresponding to the second logical channel comprises eMBB (enhanced mobile broadband) data. 10. The method of claim 9,
The length of the information is 1 bit,
The logical channel configuration information comprises priority information for logical channels. 10. The method of claim 9,
When it is indicated by the information that the MCS is related to the error rate, data corresponding to the first logical channel is transmitted based on the resources,
When it is indicated by the information that the MCS is related to the throughput, data corresponding to the second logical channel is transmitted based on the resources. In a base station in a wireless communication system,
transceiver; and
connected to the transceiver,
A message including logical channel configuration information is transmitted to the terminal through radio resource control (RRC) signaling, and the logical channel configuration information includes information about a first logical channel related to an error rate and information about a second logical channel related to throughput. includes,
transmits an uplink grant to the terminal, wherein the uplink grant includes a modulation and coding scheme (MCS) and information indicating whether the MCS is related to the error rate or the throughput;
and a controller for receiving data through resources allocated to a logical channel corresponding to the information among the first logical channel and the second logical channel. 14. The method of claim 13,
The data corresponding to the first logical channel includes low latency communication (URLLC),
The data corresponding to the second logical channel comprises eMBB (enhanced mobile broadband) data. 14. The method of claim 13,
The length of the information is 1 bit,
The base station, characterized in that the logical channel configuration information includes priority information for logical channels. 14. The method of claim 13,
When it is indicated by the information that the MCS is related to the error rate, data corresponding to the first logical channel is received based on the resources;
and when the information indicates that the MCS is related to the throughput, data corresponding to the second logical channel is received based on the resources.

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