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BR-112024002663-B1 - User equipment, method of a user equipment, network equipment and method of a network equipment

BR112024002663B1BR 112024002663 B1BR112024002663 B1BR 112024002663B1BR-112024002663-B1

Abstract

DOWNLINK TRANSMISSION/RECEPTION PROCEDURE FOR SMALL DATA TRANSMISSIONS. Devices, methods and systems are disclosed for a DL transmission/reception procedure for SDTs. A device (1100) includes a transceiver (1125) and a processor (1105) coupled to the transceiver (1105). The processor (1105) is configured to make the device (1100) receive a PDSCH transmission from a network, the PDSCH transmission associated with a PDCCH transmission that is received on a pre-configured PDCCH monitoring occasion, the PDSCH comprising an SDT indicator. The processor (1105) is configured to make the device (1100) initiate, in response to receiving the SDT indicator, an SDT procedure by transmitting to the network an RRC signaling message and downlink-related control information in a pre-configured uplink lease resource.

Inventors

  • Joachim Löhr
  • Prateek Basu Mallick
  • Hyung-Nam Choi
  • Ravi Kuchibhotla

Assignees

  • LENOVO (SINGAPORE) PTE. LTD

Dates

Publication Date
20260317
Application Date
20220811
Priority Date
20210811

Claims (15)

  1. 1. User equipment (UE) (1100), characterized in that it comprises: at least one memory (1110); and at least one processor (1105) coupled with the at least one memory (1110) and configured to make the UE (1100): receive a paging message comprising an indication to initiate a small data transmission (SDT) procedure; receive one or more received reference signal power thresholds (RSRP); and determine whether to initiate, in response to receiving the indication, the SDT procedure based at least in part on the one or more RSRP thresholds.
  2. 2. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make the UE (1100) receive the paging message on a physical downlink control channel monitoring (PDCCH) occasion.
  3. 3. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make UE (1100) receive downlink data while in an inactive state in response to initiating the SDT procedure.
  4. 4. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make the UE (1100) receive one or more RSRP thresholds on a broadcast channel.
  5. 5. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make the UE (1100) receive one or more RSRP thresholds within a radio resource control (RRC) message.
  6. 6. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make UE (1100) apply a different RSRP threshold to the SDT procedure triggered by the paging message than a different SDT procedure triggered by UE (1100).
  7. 7. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make the UE (1100) set a Radio Resource Control Resumption (RRC) cause to a value representing an indication that the SDT procedure is initiated based on the received paging message.
  8. 8. UE (1100), according to claim 1, characterized in that at least one processor (1105) is configured to make the UE (1100) set a Radio Resource Control Resumption (RRC) cause to a value representing a Mobile Terminal Access (mt-Access) indication in an RRC Resumption Request message.
  9. 9. UE (1100), according to claim 1, characterized in that the SDT procedure comprises one of a configured grant (CG) SDT procedure and one random access channel (RACH) SDT procedure.
  10. 10. A method of a user equipment (UE) (1100), characterized in that it comprises: receiving a paging message comprising an indication to initiate a small data transmission (SDT) procedure; receiving one or more reference signal received power thresholds (RSRP); and determining whether to initiate, in response to receiving the indication, the SDT procedure based at least in part on one or more RSRP thresholds.
  11. 11. Network equipment (NE) (1200), characterized in that it comprises: at least one memory (1210); and at least one processor (1205) coupled with the at least one memory (1210) and configured to make the NE (1200): transmit a paging message comprising an indication to initiate a small data transmission (SDT) procedure; transmit one or more received reference signal power thresholds (RSRP); and receive a radio resource control (RRC) message indicating that the SDT procedure is initiated.
  12. 12. NE (1200), according to claim 11, characterized in that at least one processor (1205) is configured to make the NE (1200) transmit the paging message on a physical downlink control channel monitoring (PDCCH) occasion.
  13. 13. NE (1200), according to claim 11, characterized in that at least one processor (1205) is configured to make the NE (1200) transmit one or more RSRP thresholds within a radio resource control (RRC) message.
  14. 14. NE (1200), according to claim 11, characterized in that the SDT procedure comprises one of a configured grant (CG) SDT procedure and one random access channel (RACH) SDT procedure.
  15. 15. Network Equipment (NE) (1200) method, characterized in that it comprises: transmitting a paging message comprising an indication to initiate a small data transmission (SDT) procedure; transmitting one or more received reference signal power thresholds (RSRP); and receiving a radio resource control (RRC) message indicating that the SDT procedure is initiated.

Description

CROSS-REFERENCE TO RELATED REQUESTS [001] This application claims the benefit of U.S. Provisional Patent Application No. 63/232,058, entitled “DOWNLINK TRANSMISSION/RECEPTION PROCEDURE FOR SMALL DATA TRANSMISSIONS” (DOWNLINK TRANSMISSION/RECEPTION PROCEDURE FOR SMALL DATA TRANSMISSIONS IN RRC_INACTIVE) and filed August 11, 2021, for Joachim Lohr, et al., which is incorporated herein by reference. FIELD [002] The subject matter disclosed in this document generally relates to wireless communications and more particularly to downlink (“DL”) transmission/reception procedures for small data transmissions (“SDTs”) in RRC_INACTIVE. BACKGROUND [003] In wireless networks, if DL SDT is not supported, the user equipment (“UE”) must re-establish a connection (e.g., switch to the RRC_CONNECTED state) for any transmission triggered by DL data, for example, mobile terminal data (“MT”). The connection definition and subsequent release to an INACTIVE state occur for each DL data transmission. However, this can result in unnecessary power consumption and signaling overhead, particularly in cases where the network (“NW”) sends small and infrequent DL data packets. BRIEF SUMMARY [004] Solutions for DL transmission/reception procedures for SDTs in RRC_INACTIVE are disclosed. The solutions can be implemented by devices, systems, methods or computer program products. [005] In one embodiment, a first device includes a transceiver and a processor coupled to the transceiver. In one embodiment, the processor is configured to cause the device to receive a physical downlink shared channel transmission (“PDSCH”) from a network, the PDSCH transmission associated with a physical downlink control channel transmission (“PDCCH”) that is received on a pre-configured PDCCH monitoring occasion, the PDSCH comprising an SDT indicator. In one embodiment, the processor is configured to cause the device to initiate, in response to receiving the SDT indicator, an SDT procedure by transmitting to the network a radio resource control signaling message (“RRC”) and downlink-related control information on a pre-configured uplink lease resource. [006] In one embodiment, a first method receives a PDSCH transmission from a network, the PDSCH transmission being associated with a PDCCH transmission that is received on a pre-configured PDCCH monitoring occasion, the PDSCH comprising an SDT indicator. In one embodiment, the first method initiates, in response to receiving the SDT indicator, an SDT procedure by transmitting to the network an RRC signaling message and downlink-related control information on a pre-configured uplink lease resource. [007] In one embodiment, a second device includes a transceiver and a processor coupled to the transceiver. In one embodiment, the processor is configured to make the device transmit a PDSCH transmission to a UE, the PDSCH transmission associated with a PDCCH transmission that is received on a pre-configured PDCCH monitoring occasion, the PDSCH comprising an SDT indicator. In one embodiment, the processor is configured to make the device receive, from the UE, an RRC signaling message and downlink-related control information on a pre-configured uplink lease resource using an SDT procedure based on the SDT indicator. [008] In one embodiment, the second method transmits a PDSCH transmission to a UE, the PDSCH transmission associated with a PDCCH transmission that is received on a pre-configured PDCCH monitoring occasion, the PDSCH comprising an SDT indicator. In another embodiment, the second method receives, from the UE, an RRC signaling message and downlink-related control information on a pre-configured uplink lease resource using an SDT procedure based on the SDT indicator. BRIEF DESCRIPTION OF THE DRAWINGS [009] A more detailed description of the modalities briefly described above will be presented by reference to specific modalities that are illustrated in the attached drawings. Understanding that these drawings represent only some modalities and should not, therefore, be considered limiting to the scope, the modalities will be described and explained with specificity and additional details through the use of the attached drawings, in which: Figure 1 is a schematic block diagram illustrating a modality of a wireless communication system for DL transmission/reception procedure for SDTs; Figure 2 represents an RRC Resumption Procedure; Figure 3 represents a procedure for SDT based on random access channel (“RACH”)/configured grant (“CG”) in RRC_INACTIVE; Figure 4 represents a procedure for RACH-SDT with subsequent data transmissions; Figure 5 represents a procedure for selecting SDT/non-SDT resources; Figure 6 represents a procedure for CG-SDT triggered by NW for DL data (MT); Figure 7 represents a procedure for RACH-SDT triggered by NW for DL data (MT); Figure 8 represents an SDT procedure without RRC triggered by NW for DL data (MT); Figure 9 represents a contention-free random access (“CFRA”) SDT procedure triggered b