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EP-4736336-A1 - METHOD AND APPARATUS FOR MULTI-USER SPATIAL MULTIPLEXING SCHEDULING IN WIRELESS COMMUNICATION SYSTEM

EP4736336A1EP 4736336 A1EP4736336 A1EP 4736336A1EP-4736336-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. The disclosure relates to the operation of a terminal and a base station in a wireless communication system. Specifically, the disclosure relates to a method for transmission and reception using spatial multiplexing in a wireless communication system and an apparatus capable of performing the same. The disclosure provides an apparatus and a method that can effectively provide services in a mobile communication system.

Inventors

  • JANG, Youngrok
  • LIM, Seongmok
  • Ji, Hyoungju
  • CHOI, Kyungjun

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240730

Claims (15)

  1. A method performed by a terminal in a communication system, the method comprising: receiving, from a base station, configuration information indicating information on multi-user multi-input and multi-output (MU-MIMO) that is included in downlink control information (DCI) via higher layer signaling; receiving, from the base station, the DCI that schedules downlink data, wherein the DCI includes the information on the MU-MIMO; and receiving, from the base station, the downlink data based on the information on the MU-MIMO, wherein a value 0 of the information on the MU-MIMO indicates that no other terminal that is scheduled with the terminal exists or another terminal that is scheduled with the terminal using a different demodulation reference signal (DMRS) sequence exists.
  2. The method of claim 1, wherein the higher layer signaling is configured for a bandwidth part (BWP).
  3. The method of claim 1, wherein the DCI corresponds to a DCI format 1_1.
  4. The method of claim 1, wherein antenna port information included in the DCI is not associated with a two codewords (CWs) scheduling.
  5. A method performed by a base station in a communication system, the method comprising: transmitting, to a terminal, configuration information indicating information on multi-user multi-input and multi-output (MU-MIMO) that is included in downlink control information (DCI) via higher layer signaling; transmitting, to the terminal, the DCI that schedules downlink data, wherein the DCI includes the information on the MU-MIMO; and transmitting, to the terminal, the downlink data, wherein a value 0 of the information on the MU-MIMO indicates that no other terminal that is scheduled with the terminal exists or another terminal that is scheduled with the terminal using a different demodulation reference signal (DMRS) sequence exists.
  6. The method of claim 5, wherein the higher layer signaling is configured for a bandwidth part (BWP).
  7. The method of claim 5, wherein the DCI corresponds to a DCI format 1_1.
  8. The method of claim 5, wherein antenna port information included in the DCI is not associated with a two codewords (CWs) scheduling.
  9. A terminal in a communication system, the terminal comprising: a transceiver; and a controller configured to: receive, from a base station, configuration information indicating information on multi-user multi-input and multi-output (MU-MIMO) that is included in downlink control information (DCI) via higher layer signaling, receive, from the base station, the DCI that schedules downlink data, wherein the DCI includes the information on the MU-MIMO, and receive, from the base station, the downlink data based on the information on the MU-MIMO, wherein a value 0 of the information on the MU-MIMO indicates that no other terminal that is scheduled with the terminal exists or another terminal that is scheduled with the terminal using a different demodulation reference signal (DMRS) sequence exists.
  10. The terminal of claim 9, wherein the higher layer signaling is configured for a bandwidth part (BWP).
  11. The terminal of claim 9, wherein the DCI corresponds to a DCI format 1_1.
  12. The terminal of claim 9, wherein antenna port information included in the DCI is not associated with a two codewords (CWs) scheduling.
  13. A base station in a communication system, the base station comprising: a transceiver; and a controller configured to: transmit, to a terminal, configuration information indicating information on multi-user multi-input and multi-output (MU-MIMO) that is included in downlink control information (DCI) via higher layer signaling, transmit, to the terminal, the DCI that schedules downlink data, wherein the DCI includes the information on the MU-MIMO, and transmit, to the terminal, the downlink data, wherein a value 0 of the information on the MU-MIMO indicates that no other terminal that is scheduled with the terminal exists or another terminal that is scheduled with the terminal using a different demodulation reference signal (DMRS) sequence exists.
  14. The base station of claim 13, wherein the higher layer signaling is configured for a bandwidth part (BWP).
  15. The base station of claim 13, wherein the DCI corresponds to a DCI format 1_1, and wherein antenna port information included in the DCI is not associated with a two codewords (CWs) scheduling.

Description

METHOD AND APPARATUS FOR MULTI-USER SPATIAL MULTIPLEXING SCHEDULING IN WIRELESS COMMUNICATION SYSTEM The disclosure relates to the operation of a terminal and a base station in a wireless communication system. Specifically, the disclosure relates to a method for multi-user spatial multiplexing scheduling in a wireless communication system and an apparatus capable of performing the same. 5th generation (5G) mobile communication technologies define broad frequency bands to provide higher transmission rates and new services, and can be implemented in "Sub 6GHz" bands such as 3.5GHz, and also in "above 6GHz" bands, which may be referred to as mmWave bands including 28GHz and 39GHz. In addition, the implementation of 6th generation 6G mobile communication technologies (e.g., beyond 5G systems) in terahertz bands (e.g., 95GHz to 3THz bands) has been proposed in order to achieve transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. Since the beginning of the development of 5G mobile communication technologies, in order to support various services and to satisfy performance requirements in connection with enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine-type communications (mMTC), there has been ongoing standardization regarding beamforming and massive multi-input multi-output (MIMO) for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (e.g., operating multiple subcarrier spacings (SCSs)) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of a bandwidth part (BWP), new channel coding methods such as a low density parity check (LDPC) code for large amount of data transmission and a polar code for highly reliable transmission of control information, layer 2 (L2) pre-processing, and network slicing for providing a dedicated network specialized to a specific service. Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as vehicle-to-everything (V2X) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, new radio (NR)-Unlicensed (U) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE power saving, non-terrestrial network (NTN), which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning. There has also been ongoing standardization in air interface architecture/protocol regarding technologies such as industrial Internet of things (IIoT) for supporting new services through interworking and convergence with other industries, integrated access and backhaul (IAB) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and dual active protocol stack (DAPS) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture/service regarding a 5G baseline architecture (e.g., service based architecture or service based interface) for combining network functions virtualization (NFV) and software-defined networking (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE positions. As 5G mobile communication systems are commercialized, an exponentially increasing number of connected devices will be connected to communication networks, and it is expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with extended reality (XR) for efficiently supporting augmented reality (AR), virtual reality (VR), mixed reality (MR), etc., 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication. Such development of 5G mobile communication systems will serve as a basis for developing new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as full dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas