EP-4485835-B1 - METHOD AND DEVICE FOR PERFORMING UPLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM

Inventors

• NOH, MINSEOK
• CHOI, Kyungjun
• KWAK, JINSAM

Dates

Publication Date

20260513

Application Date

20210215

Claims (10)

1. A user equipment (100) configured to operate in a wireless communication system, the user equipment comprising, a communication module; and a processor that controls the communication module, wherein the processor is configured to: perform a configured grant, CG, uplink transmission to a base station on a first resource within a bandwidth part, BWP, using a channel access procedure, wherein the BWP is configured with a plurality of Listen Before Talk, LBT, bandwidth subsets, perform a scheduled uplink transmission to the base station on a second resource within the BWP, wherein the first resource and the second resource are continuous in a time domain, characterized in that : when conditions are satisfied, the scheduled uplink transmission is performed on the second resource immediately after a last symbol for the CG uplink transmission, when at least one of the conditions are not satisfied, the last symbol for the CG uplink transmission is dropped before a start symbol of the second resource, and wherein the conditions include a case where the second resource occupies all resource blocks, RBs, included in a LBT bandwidth subset among the plurality of LBT bandwidth subsets.
2. The user equipment of claim 1, wherein the channel access procedure is performed based on random backoff using a contention window, CW, of a variable size.
3. The user equipment of claim 1 or 2, wherein the CG uplink transmission is performed on a resource pre-configured semi-statically.
4. The user equipment of any one of claims 1 to 3, wherein the conditions further include that a first channel access priority class, CAPC, value of the performed channel access is larger than or equal to a second CAPC value corresponding to the scheduled uplink transmission.
5. The user equipment of claim 4, wherein the conditions further include that a sum of transmission durations of the first resource and the second resource in a time domain does not exceed a maximum channel occupancy time, MCOT, corresponding to the first CAPC value.
6. A method performed by a user equipment (100) configured to operate in wireless communication system, comprising: performing a configured grant, CG, uplink transmission to a base station on a first resource within a bandwidth, BWP, using a channel access procedure, wherein the BWP is configured with a plurality of Listen Before Talk, LBT, bandwidth subsets; and performing a scheduled uplink transmission to the base station on a second resource, wherein the first resource and the second resource are continuous in a time domain, characterized in that : when conditions are satisfied, the scheduled uplink transmission is performed on the second resource immediately after a last symbol for the CG uplink transmission, when at least one of the conditions are not satisfied, the last symbol of the CG uplink transmission is dropped before a start symbol of the second resource, and wherein the conditions include a case where the second resource occupies all resource blocks, RBs, included in a LBT bandwidth subset among the plurality of LBT bandwidth subsets.
7. The method of claim 6, wherein the channel access procedure is performed based on random backoff using a contention window, CW, of a variable size.
8. The method of claim 6 or 7, wherein the CG uplink transmission is performed on a resource pre-configured semi-statically.
9. The method of any one of claims 6 to 8, wherein the conditions further include that a first channel access priority class, CAPC, value of the performed channel access is larger than or equal to a second CAPC value corresponding to the scheduled uplink transmission.
10. The method of claim 9, wherein the conditions further include that a sum of transmission durations of the first resource and the second resource in a time domain does not exceed a maximum channel occupancy time, MCOT, corresponding to the first CAPC value.

Description

TECHNICAL FIELD The present specification relates to a wireless communication system, particularly to a method and device for performing uplink transmission. BACKGROUND ART After commercialization of 4th generation (4G) communication system, in order to meet the increasing demand for wireless data traffic, efforts are being made to develop new 5th generation (5G) communication systems. The 5G communication system is called as a beyond 4G network communication system, a post LTE system, or a new radio (NR) system. In order to achieve a high data transfer rate, 5G communication systems include systems operated using the millimeter wave (mmWave) band of 6 GHz or more, and include a communication system operated using a frequency band of 6 GHz or less in terms of ensuring coverage so that implementations in base stations and terminals are under consideration. A 3rd generation partnership project (3GPP) NR system enhances spectral efficiency of a network and enables a communication provider to provide more data and voice services over a given bandwidth. Accordingly, the 3GPP NR system is designed to meet the demands for high-speed data and media transmission in addition to supports for large volumes of voice. The advantages of the NR system are to have a higher throughput and a lower latency in an identical platform, support for frequency division duplex (FDD) and time division duplex (TDD), and a low operation cost with an enhanced end-user environment and a simple architecture. For more efficient data processing, dynamic TDD of the NR system may use a method for varying the number of orthogonal frequency division multiplexing (OFDM) symbols that may be used in an uplink and downlink according to data traffic directions of cell users. For example, when the downlink traffic of the cell is larger than the uplink traffic, the base station may allocate a plurality of downlink OFDM symbols to a slot (or subframe). Information about the slot configuration should be transmitted to the terminals. In order to alleviate the path loss of radio waves and increase the transmission distance of radio waves in the mmWave band, in 5G communication systems, beamforming, massive multiple input/output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, hybrid beamforming that combines analog beamforming and digital beamforming, and large scale antenna technologies are discussed. In addition, for network improvement of the system, in the 5G communication system, technology developments related to evolved small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network, device to device communication (D2D), vehicle to everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), moving network, cooperative communication, coordinated multi-points (CoMP), interference cancellation, and the like are being made. In addition, in the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC), which are advanced coding modulation (ACM) schemes, and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA), which are advanced connectivity technologies, are being developed. Meanwhile, in a human-centric connection network where humans generate and consume information, the Internet has evolved into the Internet of Things (IoT) network, which exchanges information among distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connection with cloud servers, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, so that in recent years, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) have been studied for connection between objects. In the IoT environment, an intelligent internet technology (IT) service that collects and analyzes data generated from connected objects to create new value in human life can be provided. Through the fusion and mixture of existing information technology (IT) and various industries, IoT can be applied to fields such as smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliance, and advanced medical service. Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as a sensor network, a machine to machine (M2M), and a machine type communication (MTC) are implemented by techniques such as beamforming, MIMO, and array antennas. The application of the cloud RAN as the big data processing technology described above is an example of the fusion of 5G technology and IoT technology. Generally, a mobile commun