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EP-4740662-A1 - PDCCH MONITORING ADAPTATION IN FULL-DUPLEX SYSTEMS

EP4740662A1EP 4740662 A1EP4740662 A1EP 4740662A1EP-4740662-A1

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Apparatuses and methods for adaptation of monitoring for physical downlink control channels (PDCCHs) in full-duplex (FD) systems. A method for a user equipment (UE) to receive PDCCHs includes receiving first and second sets of parameters for reception of first and second PDCCHs associated with first and second subset of slots, respectively. The method further includes receiving a first PDCCH from the first PDCCHs that provides a downlink control information (DCI) format that includes a field indicating skipping receptions of the second PDCCHs and skipping, based on the field, receptions of the second PDCCHs in a slot from the second subset of slots at a first occasion that is after reception of the first PDCCH and before an end of a time duration.

Inventors

  • RUDOLF, MARIAN
  • FARAG, Emad Nader
  • PAPASAKELLARIOU, ARISTIDES

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240801

Claims (15)

  1. A method for a user equipment (UE) to receive physical downlink control channels (PDCCHs), the method comprising: receiving (i) a first set of parameters for reception of first PDCCHs associated with a first subset of slots from a set of slots and (ii) a first transmission configuration indicator (TCI) state configuration on a cell; receiving (i) a second set of parameters for reception of second PDCCHs associated with a second subset of slots from the set of slots and (ii) a second TCI state configuration on the cell; receiving a first PDCCH from the first PDCCHs that provides a downlink control information (DCI) format, wherein the DCI format includes a field indicating skipping receptions of the second PDCCHs; and skipping, based on the field, receptions of the second PDCCHs in a slot from the second subset of slots at a first occasion that is after reception of the first PDCCH and before an end of a time duration, wherein the first subset of slots does not include time-domain resources indicated for simultaneous transmission and reception on the cell, and wherein the second subset of slots includes time-domain resources indicated for simultaneous transmission and reception on the cell.
  2. The method of claim 1, wherein: a first TCI state code point from the first TCI state configuration or a second TCI state code point from the second TCI state configuration includes: a downlink (DL) TCI state, an uplink (UL) TCI state, a joint TCI state, or a pair of DL TCI state and UL TCI state; a TCI state includes a source reference signal for quasi-colocation or for spatial information; if the TCI state is associated with the first TCI state code point, the source reference signal is transmitted in the first subset of slots or symbols; and if the TCI state is associated with the second TCI state code point, the source reference signal is transmitted the second subset of slots or symbols.
  3. The method of claim 1, further comprising receiving the second PDCCHs in a slot from the second subset of slots at a second occasion that is after the end of the time duration.
  4. The method of claim 1, wherein: skipping receptions of the second PDCCHs further comprises skipping receptions of the second PDCCHs based on a slot or symbol type; and the slot or symbol type is a downlink (DL) or flexible (F) slot or symbol.
  5. The method of claim 1, wherein: the field corresponds to an extended PDCCH monitoring adaptation field, the time duration associated with the skipping of receptions of the second PDCCHs is provided by a first radio resource control (RRC) parameter, and another time duration associated with skipping of receptions of the first PDCCHs is provided by a second RRC parameter.
  6. The method of claim 1, wherein: skipping receptions of the second PDCCHs further comprises skipping receptions of the second PDCCHs based on a subband full-duplex (SBFD) subband type; and the SBFD subband type is a first DL subband, a second DL subband, a flexible (F) subband, or an uplink (UL) subband.
  7. The method of claim 1, wherein: the time duration is a second time duration, the field comprises first bits and second bits, the first bits indicate a first time duration associated with skipping of receptions of the first PDCCHs, and the second bits indicate the second time duration associated with skipping of receptions of the second PDCCHs.
  8. A user equipment (UE), comprising: a transceiver configured to: receive (i) a first set of parameters for reception of first physical downlink control channels (PDCCHs) associated with a first subset of slots from a set of slots and (ii) a first transmission configuration indicator (TCI) state configuration on a cell; receive (i) a second set of parameters for reception of second PDCCHs associated with a second subset of slots from the set of slots and (ii) a second TCI state configuration on the cell; and receive a first PDCCH from the first PDCCHs that provides a downlink control information (DCI) format, wherein the DCI format includes a field indicating skipping receptions of the second PDCCHs; and a processor operably coupled to the transceiver, the processor configured to determine to skip, based on the field, receptions of the second PDCCHs in a slot from the second subset of slots at a first occasion that is after reception of the first PDCCH and before an end of a time duration, wherein the first subset of slots does not include time-domain resources indicated for simultaneous transmission and reception on the cell, and wherein the second subset of slots includes time-domain resources indicated for simultaneous transmission and reception on the cell.
  9. The UE of claim 8, wherein: a first TCI state code point from the first TCI state configuration or a second TCI state code point from the second TCI state configuration includes: a downlink (DL) TCI state, an uplink (UL) TCI state, a joint TCI state, or a pair of DL TCI state and UL TCI state; a TCI state includes a source reference signal for quasi-colocation or for spatial information; if the TCI state is associated with the first TCI state code point, the source reference signal is transmitted in the first subset of slots or symbols; and if the TCI state is associated with the second TCI state code point, the source reference signal is transmitted the second subset of slots or symbols.
  10. The UE of claim 8, wherein the transceiver is further configured to receive the second PDCCHs in a slot from the second subset of slots at a second occasion that is after the end of the time duration.
  11. The UE of claim 8, wherein: the processor is further configured to determine to skip receptions of the second PDCCHs based on a slot or symbol type; and the slot or symbol type is a downlink (DL) or flexible (F) slot or symbol.
  12. The UE of claim 8, wherein: the field corresponds to an extended PDCCH monitoring adaptation field, the time duration associated with the skipping of receptions of the second PDCCHs is provided by a first radio resource control (RRC) parameter, and another time duration associated with skipping of receptions of the first PDCCHs is provided by a second RRC parameter.
  13. The UE of claim 8, wherein: the processor is further configured to determine to skip receptions of the second PDCCHs based on a subband full-duplex (SBFD) subband type; and the SBFD subband type is a first DL subband, a second DL subband, a flexible (F) subband, or an uplink (UL) subband.
  14. The UE of claim 8, wherein: the time duration is a second time duration, the field comprises first bits and second bits, the first bits indicate a first time duration associated with skipping of receptions of the first PDCCHs, and the second bits indicate the second time duration associated with skipping of receptions of the second PDCCHs.
  15. A base station (BS), comprising: a processor; and a transceiver operably coupled to the processor, the transceiver configured to: transmit (i) a first set of parameters for reception of first physical downlink control channels (PDCCHs) associated with a first subset of slots from a set of slots and (ii) a first transmission configuration indicator (TCI) state configuration on a cell; transmit (i) a second set of parameters for reception of second PDCCHs associated with a second subset of slots from the set of slots and (ii) a second TCI state configuration on the cell; and transmit a first PDCCH from the first PDCCHs that provides a downlink control information (DCI) format, wherein the DCI format includes a field indicating skipping receptions of the second PDCCHs in a slot from the second subset of slots at a first occasion that is after transmission of the first PDCCH and before an end of a time duration, wherein the first subset of slots does not include time-domain resources indicated for simultaneous transmission and reception on the cell, and wherein the second subset of slots includes time-domain resources indicated for simultaneous transmission and reception on the cell.

Description

PDCCH MONITORING ADAPTATION IN FULL-DUPLEX SYSTEMS The present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure is related to adaptation of monitoring for physical downlink control channels (PDCCHs) in full-duplex (FD) systems. 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 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 A