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EP-4740663-A1 - METHOD AND APPARATUS FOR SL CSI-RS SIGNALING

EP4740663A1EP 4740663 A1EP4740663 A1EP 4740663A1EP-4740663-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Methods and apparatuses for sidelink (SL) channel state information (CSI)-reference signal (RS) signaling. A method of operating a user equipment (UE) includes receiving configuration information for a SL slot, the SL slot including a first part of the SL slot and a second part of the SL slot. The first part includes one or more SL channels. The second part includes one or more SL CSI-RS resources. The method further includes receiving a first SL channel from the one or more SL channels; determining, based on the first SL channel, a first SL CSI-RS resource from the one or more SL CSI-RS resources; and receiving the first SL CSI-RS resource.

Inventors

  • FARAG, Emad Nader

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240809

Claims (15)

  1. A user equipment (UE) comprising: a transceiver configured to receive: configuration information for a sidelink (SL) slot, the SL slot including a first part of the SL slot and a second part of the SL slot, wherein the first part includes one or more SL channels and wherein the second part includes one or more SL channel state information reference signal (CSI-RS) resources, and a first SL channel from the one or more SL channels; and a processor operably coupled to the transceiver, the processor configured to determine, based on the first SL channel, a first SL CSI-RS resource from the one or more SL CSI-RS resources, wherein the transceiver is further configured to receive the first SL CSI-RS resource.
  2. The UE of claim 1, wherein the configuration information includes an association between the first SL channel and the first SL CSI-RS resource.
  3. The UE of claim 1, wherein the first SL channel is at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH).
  4. The UE of claim 1, wherein the first SL channel includes information indicating at least one of: symbols used for the first SL CSI-RS resource, sub-channels used for the first SL CSI-RS resource, wherein a sub-channel from the sub-channels is one or more physical resource blocks (PRBs), sub-carriers within the one or more PRBs used for the first SL CSI-RS resource, and whether the one or more PRBs used for the first SL CSI-RS resource are even or odd.
  5. The UE of claim 1, wherein the first SL channel includes information indicating more than one SL CSI-RS resource.
  6. The UE of claim 1, wherein: the SL slot includes more than one occasion, an occasion from the more than one occasion includes N symbols, where N>=1, each occasion of the more than one occasion includes the first part and the second part, and a SL channel in the first part of the occasion indicates a SL CSI-RS in the second part of the occasion.
  7. The UE of claim 1, wherein: the transceiver is further configured to transmit: a second SL CSI-RS resource from the one or more SL CSI-RS resources, and a second SL channel from the one or more SL channels, the second SL channel is associated with the second SL CSI-RS resource, the second SL channel and the second SL CSI-RS resource use a same spatial domain transmission filter.
  8. The UE of claim 1, wherein: the transceiver is further configuration to transmit: more than one CSI-RS resources from the one or more SL CSI-RS resources, and a second SL channel from the one or more SL channels, the second SL channel is associated with the more than one CSI-RS resources.
  9. A method of operating a user equipment (UE), the method comprising: receiving configuration information for a sidelink (SL) slot, the SL slot including a first part of the SL slot and a second part of the SL slot, wherein the first part includes one or more SL channels and wherein the second part includes one or more SL channel state information reference signal (CSI-RS) resources; receiving a first SL channel from the one or more SL channels; determining, based on the first SL channel, a first SL CSI-RS resource from the one or more SL CSI-RS resources; and receiving the first SL CSI-RS resource.
  10. The method of claim 9, wherein the configuration information includes an association between the first SL channel and the first SL CSI-RS resource.
  11. The method of claim 9, wherein the first SL channel is at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH).
  12. The method of claim 9, wherein the first SL channel includes information indicating at least one of: more than one SL CSI-RS resource, symbols used for the first SL CSI-RS resource, sub-channels used for the first SL CSI-RS resource, wherein a sub-channel from the sub-channels is one or more physical resource blocks (PRBs), sub-carriers within the one or more PRBs used for the first SL CSI-RS resource, and whether the one or more PRBs used for the first SL CSI-RS resource are even or odd.
  13. The method of claim 9, wherein: the SL slot includes more than one occasion, an occasion from the more than one occasion includes N symbols, where N>=1, each occasion of the more than one occasion includes the first part and the second part, and a SL channel in the first part of the occasion indicates a SL CSI-RS in the second part of the occasion.
  14. The method of claim 9, further comprising transmitting: a second SL CSI-RS resource from the one or more SL CSI-RS resources; and a second SL channel from the one or more SL channels, wherein the second SL channel is associated with the second SL CSI-RS resource, wherein the second SL channel and the second SL CSI-RS resource use a same spatial domain transmission filter.
  15. The method of claim 9, further comprising transmitting: more than one CSI-RS resources from the one or more SL CSI-RS resources; and a second SL channel from the one or more SL channels, wherein the second SL channel is associated with the more than one CSI-RS resources.

Description

METHOD AND APPARATUS FOR SL CSI-RS SIGNALING The present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure relates to method and apparatuses for sidelink (SL) channel state information (CSI)-reference signal (RS) signaling. 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz (THz) bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. At the beginning of the development of 5G mobile communication technologies, in order to support 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 MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) 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 BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, 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 V2X (Vehicle-to-everything) 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, NR-U (New Radio Unlicensed) 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. Moreover, there has 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, IAB (Integrated Access and Backhaul) 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 DAPS (Dual Active Protocol Stack) 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 (for example, 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, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly 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 AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication. Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only 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 for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital