WO2023055080A1 - Configured grant 내부의 우선화 방법 및 장치 - Google Patents
Configured grant 내부의 우선화 방법 및 장치 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 496
- 238000012913 prioritisation Methods 0.000 title description 36
- 230000008569 process Effects 0.000 claims abstract description 466
- 230000005540 biological transmission Effects 0.000 claims abstract description 141
- 238000004891 communication Methods 0.000 claims abstract description 39
- 238000010397 one-hybrid screening Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 23
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Definitions
- the present invention relates to a method and apparatus for prioritizing a HARQ process of CG resources in a wireless communication system.
- 5G mobile communication technology defines a wide frequency band to enable fast transmission speed and new services. It can also be implemented in the ultra-high frequency band ('Above 6GHz') called Wave.
- 6G mobile communication technology which is called a system after 5G communication (Beyond 5G)
- Beyond 5G in order to achieve transmission speed that is 50 times faster than 5G mobile communication technology and ultra-low latency reduced to 1/10, tera Implementations in Terahertz bands (eg, such as the 3 Terahertz (3 THz) band at 95 GHz) are being considered.
- eMBB enhanced mobile broadband
- URLLC ultra-reliable low-latency communications
- mMTC massive machine-type communications
- Beamforming and Massive MIMO to mitigate the path loss of radio waves in the ultra-high frequency band and increase the propagation distance of radio waves, with the goal of satisfying service support and performance requirements, and efficient use of ultra-high frequency resources
- numerology support multiple subcarrier interval operation, etc.
- BWP Band-Width Part
- large capacity New channel coding methods such as LDPC (Low Density Parity Check) code for data transmission and Polar Code for reliable transmission of control information, L2 pre-processing, and dedicated services specialized for specific services Standardization of network slicing that provides a network has been progressed.
- LDPC Low Density Parity Check
- NR-U New Radio Unlicensed
- UE Power Saving NR terminal low power consumption technology
- NTN non-terrestrial network
- IAB Intelligent Internet of Things
- IIoT Intelligent Internet of Things
- DAPS Dual Active Protocol Stack
- 2-step random access that simplifies the random access procedure
- RACH for Standardization in the field of air interface architecture/protocol for technologies such as NR
- 5G baseline for grafting Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies Standardization in the field of system architecture/service is also in progress for an architecture (eg, service based architecture, service based interface), mobile edge computing (MEC) for which services are provided based on the location of a terminal, and the like.
- an architecture eg, service based architecture, service based interface
- MEC mobile edge computing
- AR augmented reality
- VR virtual reality
- MR mixed reality
- XR extended reality
- AI artificial intelligence
- ML machine learning
- FD-MIMO Full Dimensional MIMO
- Array Antenna for guaranteeing coverage in the terahertz band of 6G mobile communication technology.
- multi-antenna transmission technologies such as large scale antennas, metamaterial-based lenses and antennas to improve coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), RIS ( Reconfigurable Intelligent Surface) technology, as well as full duplex technology to improve frequency efficiency and system network of 6G mobile communication technology, satellite, and AI (Artificial Intelligence) are utilized from the design stage and end-to-end (End-to-End) -to-End) Development of AI-based communication technology that realizes system optimization by internalizing AI-supported functions and next-generation distributed computing technology that realizes complex services beyond the limits of terminal computing capabilities by utilizing ultra-high-performance communication and computing resources On the other hand, URLLC (Ultra-Reliable and Low
- One object of the present invention is to provide a method for performing URLLC transmission using CG (Configured Grant) resources.
- one object of the present invention is to provide a method for prioritizing resources to be used for transmission among a plurality of CG transmission resources.
- the present invention for solving the above problems is a method performed by a terminal in an unlicensed band in a wireless communication system, in which setting information for intra-CG priority is transmitted from a base station through a Radio Resource Control (RRC) message.
- RRC Radio Resource Control
- Receiving CG (Configured Grant) setting information that includes; selecting a HARQ process ID having the highest priority among at least one hybrid automatic repeat and request (HARQ) process ID; and transmitting, to a base station, a Medium Access Control Protocol Data Unit (MAC PDU) corresponding to the selected HARQ process ID through a CG resource determined based on the CG configuration information.
- CG Configured Grant
- MAC PDU Medium Access Control Protocol Data Unit
- a CG Configured Grant
- MAC PDU medium access control protocol data unit
- HARQ Hybrid Automatic HARQ
- the transceiver in the unlicensed band of a wireless communication system, the transceiver; And a control unit, wherein the control unit receives CG (Configured Grant) setting information including setting information for intra-CG priority through a Radio Resource Control (RRC) message from a base station, and at least one HARQ ( A HARQ process ID having the highest priority among hybrid automatic repeat and request process IDs is selected, and a MAC PDU (Medium Access Control Protocol Data Unit) corresponding to the selected HARQ process ID is transmitted to the base station based on the CG configuration information.
- CG Configured Grant
- RRC Radio Resource Control
- MAC PDU Medium Access Control Protocol Data Unit
- Another embodiment of the present invention is a base station in an unlicensed band of a wireless communication system, comprising: a transceiver; and a control unit, wherein the control unit transmits CG (Configured Grant) setting information including setting information for intra-CG priority through a Radio Resource Control (RRC) message to a terminal, and, from the terminal, the CG It is configured to receive a MAC PDU (Medium Access Control Protocol Data Unit) through a CG resource determined based on configuration information, and the MAC PDU is the most important among at least one hybrid automatic repeat and request (HARQ) process ID selected by the terminal.
- CG Configured Grant
- RRC Radio Resource Control
- MAC PDU Medium Access Control Protocol Data Unit
- HARQ hybrid automatic repeat and request
- Disclosed is a MAC PDU corresponding to a HARQ process ID having a high priority.
- FIG. 1 is a diagram illustrating a connection method between a terminal and a base station in a mobile communication system according to an embodiment of the present disclosure.
- FIG. 2 is a diagram illustrating a prioritization operation inside a Configured Grant according to an embodiment of the present disclosure.
- FIG. 3 is a diagram illustrating an internal operation of a HARQ process upon prioritization in a Configured Grant according to an embodiment of the present disclosure.
- FIG. 4 is a diagram illustrating an operation considered as a CGRT operation when prioritizing inside a Configured Grant according to an embodiment of the present disclosure.
- FIG. 5 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 6 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 7 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 8 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 9 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 10 is a diagram illustrating a setting operation of Configured Grant internal prioritization according to an embodiment of the present disclosure.
- 11 is a diagram illustrating an operation of determining initial transmission and retransmission of Configured Grant according to an embodiment of the present disclosure.
- FIG. 12 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- FIG. 13 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- 15 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- 16 is a diagram showing the structure of a base station according to an embodiment of the present invention.
- 17 is a diagram showing the structure of a terminal according to an embodiment of the present invention.
- FIG. 1 is a diagram illustrating a connection method between a terminal and a base station in a mobile communication system according to an embodiment of the present disclosure.
- a user equipment (UE) 110 which is one component in a mobile communication system, is a communication device possessed by a user who receives communication service, and performs wireless communication through connection with one or more base stations 120, 130, and 140. can be performed.
- the terminal is located in the coverage of base station 2 (130) and shows an example of having a radio resource control (RRC) connection with base station 2 (150).
- RRC radio resource control
- the frequency band used by the base station may be a licensed band used by a communication service provider for renting a frequency or an unlicensed band that may be used without permission.
- LBT Listen Before Talk
- transmission for wireless communication may collide with other communication systems or other services using radio waves, and in this case, successful transmission may not be successful.
- a wireless communication protocol in the unlicensed band must be designed in consideration of the characteristics of the unlicensed band.
- URLLC Ultra-Reliable and Low-Latency Communications
- FIG. 2 is a diagram illustrating a prioritization operation inside a Configured Grant according to an embodiment of the present disclosure.
- a periodic Configured Grant (CG) resource is set, and when a data packet to be transmitted to the terminal occurs, an adjacent CG resource You can make it possible to perform an immediate transfer.
- periodic CG resources (first CG resources) are configured (220, 230, 240) to indicate that specific URLLC data packets can be transmitted.
- the CG resource may be set by an RRC reconfiguration message from the base station to the terminal, and a hybrid automatic repeat request (HARQ) process that can use each CG resource may be set.
- the HARQ process of the terminal may be identified by an HARQ Process ID (HPI), and one HARQ process in a cell corresponds to one HPI.
- the HARQ process configured for the first CG resource represents an HARQ process having HPIs of 2, 3, and 4 (210).
- MAC PDU Medium Access Control Protocol Data Unit
- the MAC PDU may also be called a transport block (TB).
- Which HARQ process each CG resource uses can be determined by the logical channel (LCH) priority of data to be included in the UE.
- LCH logical channel
- a point in time at which HARQ process to use may be determined before the CG resource is used in consideration of the processing time of the UE (time point t1) (235).
- the HARQ process used at this time may be a HARQ process having the highest logical channel priority of data that can be transmitted through the HARQ process.
- the priority of the HARQ process may be determined, and an HARQ process having the highest priority of the HARQ process may be selected and transmitted.
- the priority of data that can be transmitted to the HARQ buffer of the available HARQ process can be checked.
- the CG retransmission timer cg-RetransmissionTimer, CGRT
- CGRT CG retransmissionTimer
- Whether to perform new transmission or retransmission may be determined as follows depending on whether a CG timer (Configured GrantTimer, CGT) is operating, whether a CGRT is operating, and whether an HARQ process is pending.
- the HARQ process 250 of HPI2 when the HARQ process 250 of HPI2 is selected at time t1, it is used for new transmission according to the above conditions, and when the HARQ process of HPI3 251 or HPI4 252 is selected, it is used for retransmission according to the above conditions
- an HARQ process used for new transmission such as the HARQ process 250 of HPI2
- obtaining a new MAC PDU and using it for transmission regardless of the data of the MAC PDU currently stored in the HARQ buffer of the HARQ process Therefore, the highest priority among the priorities of a logical channel having data to be transmitted among the logical channels that can use this CG resource may be the priority of the HARQ process.
- the logical channel priority of the data stored in the HARQ buffer of the HARQ process of HPI2 is 3, but since this data will not be transmitted, the priority of the HARQ process is not affected.
- priority is given to LCH7 (261) and LCH8 (262), which are logical channels with data to be sent.
- the priority of the HARQ process of HPI2 may be 4, which is the priority of new transmission.
- the priority value may be set to a number larger than 0, and a smaller number may mean a higher priority.
- the priority of the HARQ process may be determined with a higher priority value among the priorities of included data. Since the highest priority among the priorities of data stored in the HARQ buffer of the HARQ process 251 of HPI3 is 3, the priority of the HARQ process of HPI3 may be 3. Since the highest priority among the priorities of data stored in the HARQ buffer of the HARQ process 252 of HPI4 is 4, the priority of the HARQ process of HPI4 may be 4.
- the MAC device of the terminal can select the HARQ process of HPI3 and perform transmission. there is.
- the priority of such a HARQ process may be a priority value of a CG resource transmitted when this HARQ process is selected.
- This method of selecting an HARQ process based on priority upon transmission of one CG resource may be referred to as prioritization inside a configured grant or intra-CG prioritization.
- the internal priority (Intra-CG priority) operation of the Configured Grant can be selectively set by the base station to the terminal in consideration of the capability of the supported terminal.
- a method of selecting an HARQ process may be to select an HARQ process that maximizes the priority of an uplink radio resource (Uplink Grant) of Configured Grant. This may have the same effect as selecting the HARQ process having the highest priority of the HARQ process in the embodiment of FIG. 2 .
- Uplink Grant uplink radio resource
- the HARQ process of HPI2 is a HARQ process that performs new transmission
- the logical channel priority of the data stored in the HARQ buffer is 3, but since this data will not be transmitted, the priority of the HARQ process does not affect
- LCH6 260
- LCH7 261
- LCH8 262
- LCH9 263
- LCH7 261
- LCH8 262
- Priority may be determined (265).
- an HARQ process used for retransmission such as the HARQ processes 251 and 252 of HPI3 or HPI4
- the stored MAC PDU since the MAC PDU currently stored in the HARQ buffer of the HARQ process is retransmitted, the stored MAC PDU is multiplexed ), the higher priority value among the priorities of the included data becomes the uplink radio resource priority of CG1 when this HARQ process is selected. Therefore, since the highest priority among the priorities of data stored in the HARQ buffer of the HARQ process 251 of HPI3 is 3, the priority of the HARQ process of HPI3 may be 3.
- the priority of the HARQ process of HPI4 may be 4.
- the HARQ process of HPI3 that makes (maximizes) the priority of uplink radio resources of CG1 the highest can be selected and used for transmission. It is a diagram showing the internal operation of the HARQ process during prioritization.
- a point in time at which an HARQ process must be selected for a CG resource in which a Configured Grant internal priority (Intra-CG priority) operation is set has been reached (310).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected.
- the priority of the HARQ process may vary depending on whether the MAC PDU to be sent when each HARQ process is selected is stored in the HARQ buffer of the HARQ process (320). In other words, when each HARQ process is selected, it may vary depending on whether transmission using this HARQ process is new transmission or retransmission. If the MAC PDU to be sent is stored in the HARQ buffer of the HARQ process, that is, if it is retransmitted, the priority of the logical channel with the highest priority among the logical channels of the data multiplexed and included in the MAC PDU stored in the HARQ buffer is the priority of the HARQ process may be the priority of (330).
- the priority of the logical channel with the highest priority that can be multiplexed and included in the MAC PDU among logical channels with available data to be sent may be the priority of the HARQ process (340).
- the priority of that HARQ process must be the highest among the priorities of the HARQ processes that can use that Configured Grant resource. It is necessary to check whether it is high (350). If the priority of the corresponding HARQ process is the highest among the priorities of the HARQ processes available in the CG resource, the corresponding HARQ process becomes a prioritized HARQ process, is selected by the MAC device, and transmits the CG resource. (360).
- another non-prioritized HARQ process may be a non-prioritized HARQ process (De-prioritized HARQ Process).
- the MAC device prioritizes only one HARQ process. It can be selected as a standardized HARQ process and used for transmission of CG resources.
- a method of selecting an HARQ process may be to select an HARQ process that maximizes the priority of an uplink radio resource (Uplink Grant) of Configured Grant. This may have the same effect as selecting the HARQ process as the prioritized HARQ process when the corresponding HARQ process has the highest priority in steps 350 and 360 .
- Uplink Grant uplink radio resource
- a method of selecting one HARQ process as a prioritized HARQ process may be at least one of the methods described in FIGS. 5, 6, 7, 8, and 9.
- step 350 if the priority of the HARQ process is not the highest among the priorities of the HARQ processes available in the CG resource, this HARQ process cannot be selected for transmission of the CG resource. Therefore, in order not to use it for transmission, the corresponding HARQ process may be considered as a non-prioritized HARQ process, and thus may not be used for transmission of CG resources (370).
- FIG. 4 is a diagram illustrating an operation considered as a CGRT operation when prioritizing inside a Configured Grant according to an embodiment of the present disclosure.
- CGRT (CG-RetransmissionTimer) is a timer set for the operation of an unlicensed band, and is a timer indicating the time taken until the base station recognizes the corresponding transmission after the terminal transmits the uplink Configured Grant.
- CG-RetransmissionTimer When the CGRT is running after the terminal transmits the configured grant, it is not known whether the base station has recognized the transmission of the configured grant, so the corresponding CG transmission is not performed anymore until the CGRT expires, and the operation of waiting is performed. . If there is no subsequent operation of the base station such as allocation of retransmission resources until the CGRT expires, the terminal assumes that the base station does not recognize the CG transmission and then performs retransmission of this HARQ process in the configured grant resource. Therefore, even if Intra-CG priority is set and the UE has to perform Intra-CG priority operation, the HARQ process in which CGRT is operating must not be a prioritized HARQ process.
- a point in time at which an HARQ process must be selected for a CG resource in which a Configured Grant internal priority (Intra-CG priority) operation is set has been reached (410).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. At this time, it may be necessary to check whether the CGRT for each HARQ process is running (420).
- step 430 may prevent selection of the HARQ process by considering the corresponding HARQ process as not being available (ie, considering it as an unavailable HARQ process).
- the corresponding HARQ process is selected as a prioritized HARQ process according to the logical channel priority of data to be transmitted included in the CG resource, and used for transmission of the CG resource or prioritized. It may be an HARQ process that has not been performed, so transmission may not be performed (440).
- the method of selecting the HARQ process based on the HARQ process priority may follow the method shown in the embodiments of FIGS. 3, 5, 6, 7, 8, and 9.
- FIG. 5 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- This time point may be a time point prior to actual transmission considering the processing time of the terminal, like the time point t1 shown in the embodiment of FIG. 2 .
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. As described in FIG. 3, this may be set differently depending on whether new transmission or retransmission is performed when the HARQ process is selected.
- the priority of the corresponding HARQ process can be determined by the logical channel priority that can be multiplexed and included in the data MAC PDU to be transmitted in the CG resource or multiplexed and included in the MAC PDU (520).
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the priority Since there is at most one HARQ process with the highest priority, the HARQ process with the highest priority can be selected as a prioritized HARQ process and used for transmission of CG resources (540).
- another non-prioritized HARQ process may be a non-prioritized HARQ process (De-prioritized HARQ Process).
- step 530 if there are two or more HARQ processes with the highest priority (if there are two or more HARQ processes that give the highest priority to uplink radio resources when used for CG transmission), the priority is the highest.
- one HARQ process for retransmission may be selected as a prioritized HARQ process and used for selection of CG resources (550). This is because, even if the priority of the same HARQ process, the MAC PDU to be retransmitted has a higher priority, so processing retransmission with higher priority is effective for URLLC transmission.
- step 530 it may be checked whether there are two or more HARQ processes maximizing the priority of uplink radio resources (Uplink Grant) of Configured Grant. If there are two or more HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 530, one HARQ process for retransmission among the HARQ processes maximizing the uplink radio resource priority of Configured Grant is selected in step 550. It can be selected as a prioritized HARQ process and used for the transmission of Configured Grant.
- Uplink Grant uplink radio resources
- FIG. 6 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- a point in time at which an HARQ process must be selected for a CG resource in which a Configured Grant internal priority (Intra-CG priority) operation is set has been reached (610).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. As described in FIG. 3, this may be set differently depending on whether new transmission or retransmission is performed when the HARQ process is selected.
- the priority of the corresponding HARQ process can be determined by the logical channel priority that can be multiplexed and included in the data MAC PDU to be transmitted in the CG resource or multiplexed and included in the MAC PDU (620).
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the priority Since there is at most one HARQ process with the highest priority, the HARQ process with the highest priority can be selected as a prioritized HARQ process and used for transmission of CG resources (640).
- another non-prioritized HARQ process may be a non-prioritized HARQ process (De-prioritized HARQ Process).
- step 630 if there are two or more HARQ processes with the highest priority (if there are two or more HARQ processes that give the highest priority to uplink radio resources when used for CG transmission), the highest priority Among the HARQ processes, the HARQ process for retransmission may be selected as a prioritized HARQ process and used for selection of CG resources. However, if there are two or more HARQ processes for retransmission with the highest priority, the HARQ process with the smallest HARQ process ID (HPI) value (in another embodiment, the largest value may be selected) is selected as the prioritized HARQ process It can be used for transmission of CG resources (650).
- HPI HARQ process ID
- the method of selecting the HARQ process based on the HPI can be effective in estimating the HARQ process state of the terminal based on the HPI of the CG resource received by the base station.
- step 630 it may be checked whether there are two or more HARQ processes maximizing the priority of uplink radio resources (Uplink Grant) of Configured Grant. If there are two or more HARQ processes maximizing the configured grant's uplink radio resource priority in step 630, the HARQ process for retransmission is given priority among the HARQ processes maximizing the configured grant's uplink radio resource priority in step 650. It can be selected as a configured HARQ process and used for transmission of Configured Grant.
- the HARQ process with the smallest HARQ process ID value among the HARQ processes is selected as the prioritized HARQ process for Configured Grant Can be used for transmission.
- an HARQ process for retransmission is selected as a prioritized HARQ process among HARQ processes maximizing the uplink radio resource priority of the Configured Grant to the maximum of the configured grant. Can be used for Grant's transfer.
- the HARQ process with the largest HARQ process ID value among the HARQ processes is selected as the prioritized HARQ process and Configured Grant can be used for transmission of
- FIG. 7 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- a point in time when an HARQ process must be selected for a CG resource in which a configured grant internal priority (Intra-CG priority) operation is set has been reached (710).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. As described in FIG. 3, this may be set differently depending on whether new transmission or retransmission is performed when the HARQ process is selected.
- the priority of the corresponding HARQ process can be determined by the logical channel priority that can be multiplexed and included in the data MAC PDU to be transmitted in the CG resource or multiplexed and included in the MAC PDU (720).
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the priority Since there is at most one HARQ process with the highest priority, the HARQ process with the highest priority can be selected as a prioritized HARQ process and used for transmission of CG resources (740).
- other non-prioritized HARQ processes may be de-prioritized HARQ processes.
- step 730 if there are two or more HARQ processes with the highest priority (if there are two or more HARQ processes that give the highest priority to uplink radio resources when used for CG transmission), the highest priority Among the HARQ processes, an HARQ process having the smallest HARQ process ID (HPI) value (in another embodiment, the largest value may be selected) may be selected as a prioritized HARQ process and used for transmission of CG resources (750).
- the method of selecting the HARQ process based on the HPI may be effective in estimating the HARQ process state of the terminal based on the HPI of the CG resource received by the base station.
- step 730 it may be checked whether there are two or more HARQ processes maximizing the priority of uplink radio resources (Uplink Grant) of Configured Grant. If there are two or more HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 730, the HARQ process ID value is the smallest among the HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 750. The HARQ process can be selected as the prioritized HARQ process and used for the transmission of Configured Grant.
- the HARQ process having the largest HARQ process ID value among the HARQ processes maximizing the priority of uplink radio resources of the Configured Grant may be selected as a prioritized HARQ process and used for transmission of the Configured Grant.
- FIG. 8 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- a point in time when an HARQ process should be selected for a CG resource in which a configured grant internal priority (Intra-CG priority) operation is set has been reached (810).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. As described in FIG. 3, this may be set differently depending on whether new transmission or retransmission is performed when the HARQ process is selected.
- the priority of the corresponding HARQ process can be determined by the logical channel priority that can be multiplexed and included in the data MAC PDU to be transmitted in the CG resource or multiplexed and included in the MAC PDU (820).
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- only one HARQ process is selected. Therefore, it is necessary to use it for CG transmission.
- another non-prioritized HARQ process may be a non-prioritized HARQ process (De-prioritized HARQ Process).
- step 830 if there are two or more HARQ processes with the highest priority (if there are two or more HARQ processes that give the highest priority to uplink radio resources when used for CG transmission), the highest priority Among the HARQ processes, an HARQ process for retransmission and having the longest waiting time of an MAC PDU to be transmitted stored in the HARQ buffer may be selected as a prioritized HARQ process and used for selection of CG resources (850). This is because, even if the priority of the HARQ process is the same, it is effective for URLLC transmission to reduce transmission with a long delay by prioritizing transmission of a long-awaited MAC PDU.
- step 830 it may be checked whether there are two or more HARQ processes maximizing the priority of uplink radio resources (Uplink Grant) of Configured Grant. If there are two or more HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 830, the HARQ process for retransmission and HARQ among the HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 850 The HARQ process that is stored in the buffer and has the longest waiting time of the MAC PDU to be transmitted can be selected as the prioritized HARQ process and used for the transmission of Configured Grant.
- step 850 among the HARQ processes maximizing the priority of uplink radio resources of the Configured Grant, the HARQ process having the longest waiting time of the MAC PDU to be transmitted is stored in the HARQ buffer and selected as the prioritized HARQ process for transmission of the Configured Grant.
- 9 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- a point in time at which an HARQ process should be selected for a CG resource in which a Configured Grant internal priority (Intra-CG priority) operation is set is reached (910).
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- priority must be considered for each HARQ process.
- the priority of the HARQ process may be determined to be a priority value of an uplink radio resource (Configured Grant) transmitted when this HARQ process is selected. As described in FIG. 3, this may be set differently depending on whether new transmission or retransmission is performed when the HARQ process is selected.
- the priority of the corresponding HARQ process can be determined by the logical channel priority that can be multiplexed and included in the data MAC PDU to be transmitted in the CG resource or multiplexed and included in the MAC PDU (920).
- the MAC device can select an HARQ process with the highest priority of the HARQ process and use it for transmission of CG resources.
- the priority Since there is at most one HARQ process with the highest priority, the HARQ process with the highest priority can be selected as a prioritized HARQ process and used for transmission of CG resources (940).
- another non-prioritized HARQ process may be a non-prioritized HARQ process (De-prioritized HARQ Process).
- step 930 if there are two or more HARQ processes with the highest priority (if there are two or more HARQ processes that give the highest priority to uplink radio resources when used for CG transmission), the highest priority Among the HARQ processes, an HARQ process for retransmission and having the longest waiting time of an MAC PDU to be transmitted stored in the HARQ buffer is selected as a prioritized HARQ process and used for selection of CG resources. However, if there are two or more HARQ processes with the highest priority and the longest MAC PDU latency, the HARQ process with the smallest HARQ Process ID (HPI) value (the largest value may be selected in other embodiments) is selected as the priority.
- HPI HARQ Process ID
- the method of selecting the HARQ process based on the HPI can be effective in estimating the HARQ process state of the terminal based on the HPI of the CG resource received by the base station.
- step 930 it may be checked whether there are two or more HARQ processes maximizing the priority of uplink radio resources (Uplink Grant) of Configured Grant. If there are two or more HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 930, the HARQ process for retransmission and HARQ among the HARQ processes maximizing the uplink radio resource priority of Configured Grant in step 950 The HARQ process that is stored in the buffer and has the longest waiting time of the MAC PDU to be transmitted can be selected as the prioritized HARQ process and used for the transmission of Configured Grant.
- step 950 among the HARQ processes maximizing the priority of uplink radio resources of the Configured Grant, the HARQ process having the longest waiting time of the MAC PDU to be transmitted is stored in the HARQ buffer and selected as the prioritized HARQ process for transmission of the Configured Grant. can be replaced by using If there are two or more HARQ processes with the longest MAC PDU latency, the HARQ process with the smallest HARQ process ID can be selected as a prioritized HARQ process and used for transmission of Configured Grant resources. In another embodiment, when there are two or more HARQ processes having the longest MAC PDU latency, an HARQ process having the largest HARQ process ID may be selected as a prioritized HARQ process and used for transmission of the Configured Grant resource.
- FIG. 10 is a diagram illustrating a setting operation of Configured Grant internal prioritization according to an embodiment of the present disclosure.
- the base station 1010 checks whether a terminal having an RRC connection with the base station has an Intra-CG prioritization function in order to set the terminal 1020 to perform a Configured Grant internal priority (Intra-CG priority) operation. There is a need. To this end, the base station may transmit a UE Capability request message to the UE to request a report on whether the UE can perform the Intra-CG prioritization function (1030). Thereafter, the UE may report whether the Intra-CG prioritization operation can be performed using the UE Capability report message (1040). In addition to this, other functions that can be implemented and performed by the UE can be reported in the UE Capability report message.
- an LCH-based Prioritization operation for selecting one uplink radio resource when a plurality of uplink radio resources overlap on the time axis is also indicated in the UE Capability report message. It can be included and transmitted together.
- the Intra-CG prioritization operation is an operation performed when selecting an HARQ process, but is a prioritization operation using logical channel priorities. can also be made to do.
- the base station may set an operation to be performed by the terminal in an RRC reconfiguration message in consideration of functions that the terminal can perform included in the UE Capability report message transmitted by the terminal (1050). The UE may subsequently perform the operation indicated in the RRC reset message.
- 11 is a diagram illustrating an operation of determining initial transmission and retransmission of Configured Grant according to an embodiment of the present disclosure.
- the MAC device of the terminal determines the priority of the HARQ process when it arrives at the point in time when it needs to select the HARQ process for the CG resource for which the internal priority (Intra-CG priority) operation of the Configured Grant is set, and determines the priority of the HARQ process based on this. process can be selected.
- This time point like the time point t1 shown in the embodiment of FIG. 2 , may be a time point prior to actual transmission considering the processing time of the terminal.
- the priority of the HARQ process may be determined differently depending on whether transmission of the Configured Grant using this HARQ process is new transmission or retransmission, and whether other CGRTs are operating. Therefore, whether to perform new transmission or retransmission may be determined as follows depending on whether the CG timer (Configured GrantTimer, CGT) is operating, whether the CGRT is operating, and whether the HARQ process is pending.
- CGT Configured GrantTimer
- the HARQ process in which the CGRT operates may be set to the lowest priority so that it is not selected as a prioritized HARQ process.
- FIG. 12 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- the MAC device of the terminal selects the HARQ process with the highest logical channel priority of the data to be transmitted using each HARQ process and transmits it.
- Intra-CG priority operation even if the logical channel priority of the data stored in the HARQ buffer is relatively low and is not selected as a prioritized HARQ process, transmission is not performed because it is not selected as a continuously prioritized HARQ process. may occur. This may cause a phenomenon in which a specific transmission is excessively delayed, and a problem in which untransmitted packets continue to occupy the HARQ process may also occur.
- the counter value is increased by 1 and the HARQ buffer of the HARQ process is emptied when the maximum counter value is reached.
- the 1st Configured Grant resource set in the embodiment of FIG. 12 indicates that HPI has set HARQ processes 2 and 3 to be used (1210). Thereafter, an HARQ process of HPI3 is selected in the first CG resource, and the counter for HPI2 is increased by 1 to indicate that it is 1 (1220).
- the initial value of the counter is 0 and may be initialized when a MAC PDU is generated, when an HARQ process is selected, or when other settings are set.
- the counter of HPI3 can be set to 0, the initial value.
- the HARQ process of HPI3 is selected, indicating that the counter for HPI2 increases by 1 to 2 (1230). At this time, the HPI3 counter may be set to an initial value of 0.
- the HARQ process of HPI3 is also selected, indicating that the counter for HPI2 increases by 1 to 3. At this time, since the maximum value of the counter is set to 3, the maximum value of the counter is reached and the HARQ buffer of HPI2 is emptied (1240). At this time, the HPI3 counter may be set to an initial value of 0.
- FIG. 13 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- the MAC device of the terminal selects the HARQ process with the highest logical channel priority of the data to be transmitted using each HARQ process and transmits it.
- Intra-CG priority operation even if the logical channel priority of the data stored in the HARQ buffer is relatively low and is not selected as a prioritized HARQ process, transmission is not performed because it is not selected as a continuously prioritized HARQ process. may occur. This may cause a phenomenon in which a specific transmission is excessively delayed, and a problem in which untransmitted packets continue to occupy the HARQ process may also occur.
- the first Configured Grant resource set in the embodiment of FIG. 13 indicates that HPI is set to use HARQ processes 2 and 3 (1310). Thereafter, the HARQ process of HPI3 is selected in the first CG resource, and the counter for HPI2 increases by 1 to indicate that it is 1 (1320).
- the initial value of the counter is 0 and may be initialized when a MAC PDU is generated, when an HARQ process is selected, or when other settings are set. Therefore, at this time, the counter of HPI3 can be set to 0, the initial value.
- the HARQ process of HPI2 is selected, but there is another radio resource 1335 overlapping on the time axis, so this resource becomes a priority resource (Prioritized (Uplink) Grant) and the CG resource is a non-prioritized resource ( De-prioritized (Uplink) Grant) to indicate that it has not been transmitted. Therefore, it indicates that the counter for HPI2 is increased by 1 to become 2 (1330). At this time, the HPI3 counter may also increase by 1.
- the HARQ process of HPI3 is selected, indicating that the counter for HPI2 increases by 1 to 3.
- the maximum value of the counter is set to 3
- the maximum value of the counter is reached and the HARQ buffer of HPI2 is emptied (1340).
- the HPI3 counter can be set to 0, the initial value.
- the MAC device of the terminal selects the HARQ process with the highest logical channel priority of the data to be transmitted using each HARQ process and transmits it.
- Intra-CG priority operation even if the logical channel priority of the data stored in the HARQ buffer is relatively low and is not selected as a prioritized HARQ process, transmission is not performed because it is not selected as a continuously prioritized HARQ process. may occur. This may cause a phenomenon in which a specific transmission is excessively delayed, and a problem in which untransmitted packets continue to occupy the HARQ process may also occur.
- the priority of the HARQ process is increased by 1 to increase the selectability of the corresponding HARQ process in the subsequent CG resource.
- 14 shows that the priority is increased by 1, but an operation to increase the priority by a preset value is also possible.
- a lower priority value means a higher priority, so increasing the priority means lowering the priority value.
- the first Configured Grant resource set in the embodiment of FIG. 14 indicates that HPI is set to use HARQ processes 2 and 3 (1410). Thereafter, HPI2 having a priority of 7 in the first CG resource is not prioritized, indicating that HPI3 is selected (1420).
- step 1420 since the HARQ process of HPI2 was not selected as a prioritized HARQ process, the priority of the HARQ process of HPI2 is raised to 6 by one step. Thereafter, Intra-CG prioritization is performed on CG resources with a priority of 6, but HPI3 is selected and the HARQ process of HPI2 is not prioritized (1430). In step 1430, the HARQ process of HPI2 is selected as the prioritized HARQ process. Since it could not be done, the priority of the HARQ process of HPI2 is raised to 5 by one step.
- Intra-CG prioritization operation was performed on the CG resource with a priority of 5, and the HARQ process of HPI2 is selected and transmitted as the prioritized HARQ process (1440). As such transmission is delayed, transmission of data with severe transmission delay is promoted through an operation of increasing the priority, thereby reducing transmission delay.
- 15 is a diagram illustrating detailed operations of internal prioritization of Configured Grant according to an embodiment of the present disclosure.
- the MAC device of the terminal selects the HARQ process with the highest logical channel priority of the data to be transmitted using each HARQ process and transmits it.
- Intra-CG priority operation even if the logical channel priority of the data stored in the HARQ buffer is relatively low and is not selected as a prioritized HARQ process, transmission is not performed because it is not selected as a continuously prioritized HARQ process. may occur. This may cause a phenomenon in which a specific transmission is excessively delayed, and a problem in which untransmitted packets continue to occupy the HARQ process may also occur.
- a timer is operated from the time when the MAC PDU is generated in the HARQ process, and when the timer expires, the HARQ buffer of the HARQ process is emptied.
- the timer may operate for each HARQ process, and the value of the timer may be set in advance or set by the base station's RRC reset message.
- the first Configured Grant resource set in the embodiment of FIG. 15 indicates that HPI is set to use HARQ processes 2 and 3 (1510). Thereafter, an HARQ process of HPI2 is selected in the first CG resource (1520), indicating that the timer for HPI2 is started (1525).
- the timer for HPI2 may continue to operate (1530). Even in the third CG resource, the HARQ process of HPI3 was selected, and the timer for the HARQ process of HPI2 continued to operate (1540). Afterwards, when this timer expired, the HARQ buffer of HPI2 was flushed to prevent transmission of the delayed HARQ process. It is possible to no longer perform transmissions.
- 16 is a diagram showing the structure of a base station according to an embodiment of the present invention.
- a base station may include a transceiver 1610, a control unit 1620, and a storage unit 1630.
- the controller 1620 may be defined as a circuit or an application-specific integrated circuit or at least one processor.
- the transmitting/receiving unit 1610 may transmit/receive signals with other network entities.
- the transceiver 1610 may transmit system information to the terminal and may transmit a synchronization signal or a reference signal.
- the control unit 1620 may control overall operations of the base station according to the embodiment proposed by the present invention.
- the control unit 1620 may control signal flow between blocks to perform an operation according to the flowchart described above.
- the storage unit 1630 may store at least one of information transmitted and received through the transmission and reception unit 1610 and information generated through the control unit 1620 .
- 17 is a diagram showing the structure of a terminal according to an embodiment of the present invention.
- a terminal may include a transmission/reception unit 1710, a control unit 1720, and a storage unit 1730.
- the controller may be defined as a circuit or an application-specific integrated circuit or at least one processor.
- the transmitting/receiving unit 1710 may transmit/receive signals with other network entities.
- the transceiver 1710 may receive system information from a base station and may receive a synchronization signal or a reference signal.
- the control unit 1720 may control the overall operation of the terminal according to the embodiment proposed by the present invention.
- the control unit 1720 may control signal flow between blocks to perform an operation according to the flowchart described above.
- the storage unit 1730 may store at least one of information transmitted and received through the transmission and reception unit 1710 and information generated through the control unit 1720 .
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Abstract
Description
Claims (14)
- 무선 통신 시스템의 비면허 대역에서 단말에 의해 수행되는 방법에 있어서,기지국으로부터, RRC(Radio Resource Control) 메시지를 통해 intra-CG 우선화에 대한 설정 정보를 포함하는 CG(Configured Grant) 설정 정보를 수신하는 단계;적어도 하나 이상의 HARQ(Hybrid Automatic Repeat and Request) 프로세스 ID 중 가장 높은 우선순위를 가지는 HARQ 프로세스 ID를 선택하는 단계; 및기지국으로, 선택된 상기 HARQ 프로세스 ID에 대응되는 MAC PDU(Medium Access Control Protocol Data Unit)를 상기 CG 설정 정보에 기초하여 결정된 CG 자원을 통해 전송하는 단계를 포함하는, 방법.
- 제1항에 있어서,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하는 단계는,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있는 경우, 상기 HARQ 버퍼에 저장되어 있는 상기 MAC PDU에 멀티플렉싱된 상태로 포함된 데이터에 대한 적어도 하나 이상의 논리 채널 중 우선순위가 가장 높은 논리 채널의 우선순위를 상기 HARQ 프로세스 ID의 우선 순위로 결정하는 단계를 더 포함하는, 방법.
- 제2항에 있어서,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하는 단계는,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있지 않은 경우, 상기 CG 자원을 통해 전송할 데이터를 포함하고 있는 적어도 하나 이상의 논리 채널 중 우선순위가 가장 높은 논리 채널의 상기 우선순위를 상기 HARQ 프로세스 ID의 우선 순위로 결정하는 단계를 더 포함하는, 방법.
- 제3항에 있어서,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하는 단계는,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있는 경우에 기초하여 결정된 하나 이상의 HARQ 프로세스 ID와, HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있지 않은 경우에 기초하여 결정된 하나 이상의 HARQ 프로세스 ID 중 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하는 것인, 방법.
- 제3항에 있어서,상기 적어도 하나 이상의 논리 채널은, 상기 CG 설정 정보에 기초하여 상기 CG 자원을 사용할 수 있게 설정된 논리 채널로 구성되는 것인, 방법.
- 제1항에 있어서,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하는 단계는,우선순위가 가장 높은 HARQ 프로세스가 적어도 두 개 이상 존재하는 경우, 재전송을 위한 HARQ 프로세스 ID를 초기 전송을 위한 HARQ 프로세스 ID보다 우선하여 선택하는 단계를 더 포함하는, 방법.
- 무선 통신 시스템의 비면허 대역에서의 단말에 있어서,송수신부; 및제어부를 포함하며, 상기 제어부는,기지국으로부터, RRC(Radio Resource Control) 메시지를 통해 intra-CG 우선화에 대한 설정 정보를 포함하는 CG(Configured Grant) 설정 정보를 수신하고,적어도 하나 이상의 HARQ(Hybrid Automatic Repeat and Request) 프로세스 ID 중 가장 높은 우선순위를 가지는 HARQ 프로세스 ID를 선택하며,기지국으로, 선택된 상기 HARQ 프로세스 ID에 대응되는 MAC PDU(Medium Access Control Protocol Data Unit)를 상기 CG 설정 정보에 기초하여 결정된 CG 자원을 통해 전송하도록 설정되는, 단말.
- 제7항에 있어서,상기 제어부는,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택함에 있어,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있는 경우, 상기 HARQ 버퍼에 저장되어 있는 상기 MAC PDU에 멀티플렉싱된 상태로 포함된 데이터에 대한 적어도 하나 이상의 논리 채널 중 우선순위가 가장 높은 논리 채널의 우선순위를 상기 HARQ 프로세스 ID의 우선 순위로 결정하도록 설정되는, 단말.
- 제8항에 있어서,상기 제어부는,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택함에 있어,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있지 않은 경우, 상기 CG 자원을 통해 전송할 데이터를 포함하고 있는 적어도 하나 이상의 논리 채널 중 우선순위가 가장 높은 논리 채널의 상기 우선순위를 상기 HARQ 프로세스 ID의 우선 순위로 결정하도록 설정되는, 단말.
- 제9항에 있어서,상기 제어부는,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택함에 있어,HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있는 경우에 기초하여 결정된 하나 이상의 HARQ 프로세스 ID와, HARQ 프로세스의 HARQ 버퍼에 전송할 MAC PDU가 저장되어 있지 않은 경우에 기초하여 결정된 하나 이상의 HARQ 프로세스 ID 중 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택하도록 설정되는, 단말.
- 제9항에 있어서,상기 적어도 하나 이상의 논리 채널은, 상기 CG 설정 정보에 기초하여 상기 CG 자원을 사용할 수 있게 설정된 논리 채널로 구성되는 것인, 단말.
- 제7항에 있어서,상기 제어부는,상기 가장 높은 우선 순위를 가지는 HARQ 프로세스 ID를 선택함에 있어,우선순위가 가장 높은 HARQ 프로세스가 적어도 두 개 이상 존재하는 경우, 재전송을 위한 HARQ 프로세스 ID를 초기 전송을 위한 HARQ 프로세스 ID보다 우선하여 선택하도록 설정되는, 단말.
- 무선 통신 시스템의 비면허 대역에서 기지국에 의해 수행되는 방법에 있어서,단말로, RRC(Radio Resource Control) 메시지를 통해 intra-CG 우선화에 대한 설정 정보를 포함하는 CG(Configured Grant) 설정 정보를 전송하는 단계; 및단말로부터, 상기 CG 설정 정보에 기초하여 결정된 CG 자원을 통해 MAC PDU(Medium Access Control Protocol Data Unit)를 수신하는 단계를 포함하며,상기 MAC PDU는 상기 단말에 의해 선택된 적어도 하나 이상의 HARQ(Hybrid Automatic Repeat and Request) 프로세스 ID 중 가장 높은 우선순위를 가지는 HARQ 프로세스 ID에 대응되는 MAC PDU인 것인, 방법.
- 무선 통신 시스템의 비면허 대역에서의 기지국에 있어서,송수신부; 및제어부를 포함하며, 상기 제어부는,단말로, RRC(Radio Resource Control) 메시지를 통해 intra-CG 우선화에 대한 설정 정보를 포함하는 CG(Configured Grant) 설정 정보를 전송하고,단말로부터, 상기 CG 설정 정보에 기초하여 결정된 CG 자원을 통해 MAC PDU(Medium Access Control Protocol Data Unit)를 수신하도록 설정되며,상기 MAC PDU는 상기 단말에 의해 선택된 적어도 하나 이상의 HARQ(Hybrid Automatic Repeat and Request) 프로세스 ID 중 가장 높은 우선순위를 가지는 HARQ 프로세스 ID에 대응되는 MAC PDU인 것인, 기지국.
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