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CN-116548053-B - Small data transmission method and related equipment

CN116548053BCN 116548053 BCN116548053 BCN 116548053BCN-116548053-B

Abstract

A method for small data transfer SDT and related devices are provided. In this method, a configuration is received from a base station BS. The configuration indicates a first reference signal received power, RSRP, threshold and a second RSRP threshold. Responsive to the RSRP of the downlink DL pathloss reference being above a first RSRP threshold, initiating an SDT procedure based on configuring the authorized CG resources. In response to initiating the SDT procedure based on the CG resources, the method further comprises synchronizing signal/physical broadcast channel blocks, SSBs, from a set of SSBs, in the event that the SSBs have an RSRP above a second RSRP threshold. A random access, RA, procedure is initiated in response to none of the SSBs in the set of SSBs having an RSRP above the second RSRP threshold.

Inventors

  • Cai Xinxi
  • JIN HENGLI
  • Shi Meiru

Assignees

  • 鸿颖创新有限公司

Dates

Publication Date
20260505
Application Date
20211228
Priority Date
20201229

Claims (18)

  1. 1. A method for small data transfer, SDT, applied to a user equipment, UE, the method comprising: receiving a configuration from a base station BS, wherein the configuration indicates a first reference signal received power, RSRP, threshold and a second RSRP threshold; Initiating an SDT procedure based on configuring authorized CG resources in response to an RSRP of a downlink DL pathloss reference being above the first RSRP threshold; In response to initiating the SDT process based on the CG resource: Selecting a synchronization signal/physical broadcast channel block, SSB, from the SSB group if there is a first RSRP in the SSB that is above the second RSRP threshold, and In response to no SSBs in the SSB group having an RSRP above the second RSRP threshold, the CG resource is deemed invalid and a random access RA procedure is initiated.
  2. 2. The method of claim 1, wherein, The configuration is configured by the BS via a radio resource control, RRC, release message.
  3. 3. The method of claim 1, wherein, The SSB group is configured by the BS via a radio resource control RRC release message or via system information.
  4. 4. The method of claim 1, wherein the method further comprises: And if the first RSRP is higher than the second RSRP threshold, selecting one CG resource opportunity corresponding to the selected SSB.
  5. 5. The method of claim 1, wherein, The first RSRP threshold is configured by the SDT configuration in the configuration.
  6. 6. The method of claim 1, wherein, The second RSRP threshold is configured by the CG configuration of the configurations.
  7. 7. The method of claim 1, wherein, The configuration further indicates a third RSRP threshold, the method further comprising: And in response to the RSRP changing by no more than the third RSRP threshold, treating the CG resource as being valid.
  8. 8. The method of claim 1, wherein the method further comprises: selecting an uplink UL carrier The CG resource is considered valid in response to the CG resource being configured on the selected UL carrier.
  9. 9. The method of claim 8, wherein, The selected UL carrier is one of a regular uplink NUL carrier and a supplemental uplink SUL carrier.
  10. 10. A user equipment, UE, comprising: A transceiver for transmitting or receiving signals; A memory for storing instructions, and A processor, coupled to the transceiver and the memory, configured to execute the instructions to cause the UE to: Receiving, by the transceiver, a configuration from a base station BS, wherein the configuration indicates a first reference signal received power, RSRP, threshold and a second RSRP threshold; initiating an SDT procedure by configuring authorized CG resources in response to the RSRP of the downlink DL pathloss reference being above the first RSRP threshold; In response to initiating the SDT process through the CG resource: Selecting a synchronization signal/physical broadcast channel block, SSB, from the SSB group if there is a first RSRP in the SSB that is above the second RSRP threshold, and In response to no SSBs in the SSB group having an RSRP above the second RSRP threshold, the CG resource is deemed invalid and a random access RA procedure is initiated.
  11. 11. The UE according to claim 10, wherein, The configuration is configured by the BS via a radio resource control, RRC, release message.
  12. 12. The UE according to claim 10, wherein, The SSB group is configured by the BS via a radio resource control RRC release message or via system information.
  13. 13. The UE of claim 10, wherein the processor is further configured to: And if the first RSRP is higher than the second RSRP threshold, selecting one CG resource opportunity corresponding to the selected SSB.
  14. 14. The UE according to claim 10, wherein, The first RSRP threshold is configured by the SDT configuration in the configuration.
  15. 15. The UE according to claim 10, wherein, The second RSRP threshold is configured by the CG configuration of the configurations.
  16. 16. The UE of claim 10, wherein the processor is further configured to: And in response to the RSRP changing by no more than the third RSRP threshold, treating the CG resource as being valid.
  17. 17. The UE of claim 10, wherein the processor is further configured to: selecting an uplink UL carrier The CG resource is considered valid in response to the CG resource being configured on the selected UL carrier.
  18. 18. The UE of claim 17, wherein, The selected UL carrier is one of a regular uplink NUL carrier and a supplemental uplink SUL carrier.

Description

Small data transmission method and related equipment Cross Reference to Related Applications The present application requests the benefit and priority of U.S. provisional application Ser. No. 63/131,486, filed on even 29 th 12 months 2020, under the title of "CONFIGURED UPLINK RESOURCE IN RRC INACTIVE", under the title of attorney docket No. US83788, under the title of "SMALL DATA TRANSMISSION BASED ON BEAM OPERATION", under the title of "attorney docket No. 63/131,500", under the title of "US 83789", under the title of "METHOD AND APPARATUS FOR SMALL DATA TRANSMISSION", under the title of US83790, under the title of U.S. provisional application Ser. No. 63/131,510, under the title of "12 months 29, 2020, and under the title of" METHOD AND APPARATUS FOR SMALL DATA TRANSMISSION ", under the title of US83790, the contents of these applications are incorporated herein by reference in their entirety. Technical Field The present invention relates generally to wireless communications, and more particularly, to methods and related devices for small data transmissions. With the tremendous increase in the number of connected devices and the rapid increase in user/network traffic, various efforts have been made to improve various aspects of wireless communication for next generation wireless communication systems, such as fifth generation (5G) New Radios (NRs), by increasing data rates, delays, reliability, and mobility. The 5G NR system is intended to provide flexibility and configurability to optimize network services and types to accommodate various use cases, such as enhanced mobile broadband (eMBB), large-scale machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC). Disclosure of Invention The present disclosure relates to a method and related apparatus for small data transfer (SMALL DATA transmission, SDT). In accordance with one or more embodiments of the present disclosure, a method for small data transfer, SDT, by a user equipment is provided. The method includes, but is not limited to, the following steps. The configuration is received from the base station BS. The configuration indicates a first reference signal received power, RSRP, threshold and a second RSRP threshold. Responsive to the RSRP of the downlink DL pathloss reference being above the first RSRP threshold, initiating an SDT procedure based on configuring authorized CG resources. In response to initiating the SDT procedure based on the CG resources, the method further includes the following. In case the physical broadcast channel block SSB has an RSRP above said second RSRP threshold, the synchronization signal/SSB from the SSB group. A random access, RA, procedure is initiated in response to none of the SSBs in the SSB group having an RSRP above the second RSRP threshold. According to one or more embodiments of the present disclosure, a user equipment, UE, is provided. The UE includes, but is not limited to, a transceiver, a memory, and a processor. The transceiver is used for transmitting or receiving signals. The memory is used for storing instructions. The processor is coupled to the transceiver and the memory. The processor is configured to execute the instructions to perform the following steps. The configuration is received from the base station BS. The configuration indicates a first reference signal received power, RSRP, threshold and a second RSRP threshold. Responsive to the RSRP of the downlink DL pathloss reference being above the first RSRP threshold, initiating an SDT procedure by configuring authorized CG resources. In response to initiating the SDT procedure through the CG resource, the method further comprises the following. In case the physical broadcast channel block SSB has an RSRP above said second RSRP threshold, from the synchronization signal/SSB of the slave SSB group. A random access, RA, procedure is initiated in response to none of the SSBs in the SSB group having an RSRP above the second RSRP threshold. Drawings Aspects of the present exemplary disclosure are best understood from the following detailed description when read with the accompanying drawing figures. The various features are not drawn to scale for clarity of discussion and the dimensions of the various features may be arbitrarily increased or reduced. Fig. 1 is a flow chart of a potential process of CG-based SDT shown in accordance with one of the illustrative embodiments of the present application. Fig. 2 is a flow chart of a potential process of RA-based SDT shown in accordance with one of the exemplary embodiments of the application. Fig. 3 is a schematic diagram showing an association between SSBs and CG resources and/or CG resource opportunities in accordance with one of the illustrative embodiments of the present application. Fig. 4 is a flowchart illustrating a method for a UE to use for SDT according to one of the exemplary embodiments of the present application. Fig. 5 is a schematic diagram of an index of CG re