CN-114902781-B - Method and user equipment for small data transmission

Abstract

A method for small data transmission and a User Equipment (UE) are provided. The method includes receiving a configuration indicating a dedicated physical resource from a Base Station (BS), performing the small data transmission based on the dedicated physical resource, and receiving an Acknowledgement (ACK) indicator from the BS indicating that the BS successfully received the small data transmission, wherein the UE is in a deactivated state when performing the small data transmission.

Inventors

• LIN JIAHONG
• CHEN HONGZHEN
• Shi Meiru

Assignees

• 鸿颖创新有限公司

Dates

Publication Date

20260505

Application Date

20201216

Priority Date

20191231

Claims (10)

1. 1. A method performed by a user equipment, UE, for small data transmission, the method comprising: receiving a configuration indicating a dedicated random access channel, RACH, occasion, RO, for the small data transmission from a base station, BS; Receiving a threshold value related to a data amount from the BS, the threshold value being used to determine whether to perform the small data transmission; Performing the small data transmission based on the dedicated RO when the UE is in a deactivated state, and An acknowledgement ACK indicator is received from the BS indicating that the BS successfully received the small data transmission, Wherein the ACK indicator is contained in a random access response, RAR.
2. 2. The method of claim 1, wherein the step of determining the position of the substrate comprises, The dedicated RO is obtained through dedicated signaling or broadcasted system information SI.
3. 3. The method of claim 1, wherein the step of determining the position of the substrate comprises, The ACK indication Fu Congwu handles specific UE identifier decoding on the downlink control channel PDCCH.
4. 4. The method of claim 3, wherein the step of, The particular UE identifier includes one of a deactivated radio network temporary identity, I-RNTI, a random access, RA-RNTI, a cell-RNTI, C-RNTI, or a temporary cell RNTI, TC-RNTI, the RAR including fallbackRAR or successRAR.
5. 5. The method of claim 1, wherein the step of determining the position of the substrate comprises, The small data transmission is performed via a pre-configured physical uplink shared channel PUSCH resource provided by a two-step RACH procedure, a four-step RACH procedure, or a configured grant CG type 1.
6. 6. A user equipment, UE, in a wireless communication system for small data transmissions, the wireless communication system comprising a base station, BS, the UE comprising: at least one processor, and At least one memory coupled to the at least one processor, wherein the at least one memory stores a computer executable program that, when executed by the at least one processor, causes the UE to: Receiving a configuration indicating a dedicated random access channel, RACH, occasion, RO, for the small data transmission from the BS; Receiving a threshold value related to a data amount from the BS, the threshold value being used to determine whether to perform the small data transmission; Performing the small data transmission based on the dedicated RO when the UE is in a deactivated state, and An acknowledgement ACK indicator is received from the BS indicating that the BS successfully received the small data transmission, Wherein the ACK indicator is contained in a random access response, RAR.
7. 7. The UE of claim 6, wherein, The dedicated RO is obtained through dedicated signaling or broadcasted system information SI.
8. 8. The UE of claim 6, wherein, The ACK indication Fu Congwu handles specific UE identifier decoding on the downlink control channel PDCCH.
9. 9. The UE of claim 8, wherein, The particular UE identifier includes one of a deactivated radio network temporary identity, I-RNTI, a random access, RA-RNTI, a cell-RNTI, C-RNTI, or a temporary cell RNTI, TC-RNTI, the RAR including fallbackRAR or successRAR.
10. 10. The UE of claim 6, wherein, The small data transmission is performed via a pre-configured physical uplink shared channel PUSCH resource provided by a two-step RACH procedure, a four-step RACH procedure, or a configured grant CG type 1.

Description

Method and user equipment for small data transmission Cross Reference to Related Applications The present application is a national phase application according to international patent application number PCT/CN2020/136734 filed 35u.s.c. ≡371 at 12/16 of 2020, which claims the benefit and priority of the provisional U.S. patent application serial No. 62/955,741 filed 31 of 2019. The contents of all of the above applications are hereby fully incorporated by reference into this disclosure for all purposes. Technical Field The present disclosure relates generally to wireless communications, and more particularly, to a method and user equipment for small data transmission. Background With the tremendous increase in the number of connected devices and the rapid increase in user/Network (NW: network) traffic, various efforts have been made to improve the different aspects of wireless communication of next-generation wireless communication systems, such as the fifth generation (5G) new radio (NR: newRadio), by increasing data rate, latency, reliability, and mobility. The 5G NR system is designed to provide flexibility and configurability to optimize NW services and types to accommodate different use cases, such as enhanced mobile broadband (eMBB: enhanced Mobile Broadband), large-scale machine type communications (mMTC: MASSIVE MACHINE-Type Communication), and Ultra-Reliable and Low-latency communications (URLLC:ultra-Reliable and Low-Latency Communication). However, as the demand for radio access continues to increase, there is a need in the art for improved small data transmission. Disclosure of Invention The present disclosure relates to a method and User Equipment (UE) for small data transmission when the UE is in a deactivated state. According to an aspect of the present disclosure, a method performed by a User Equipment (UE) for small data transmission is provided. The method includes receiving a configuration indicating a dedicated physical resource from a Base Station (BS), performing the small data transmission based on the dedicated physical resource, and receiving an Acknowledgement (ACK) indicator from the BS indicating that the BS successfully received the small data transmission, wherein the UE is in a deactivated state when performing the small data transmission. According to an aspect of the present disclosure, there is provided a User Equipment (UE) in a wireless communication system for small data transmission, the wireless communication system including a Base Station (BS). The UE includes a processor and a memory coupled to the processor, wherein the memory stores a computer executable program that, when executed by the processor, causes the processor to perform the small data transmission based on dedicated physical resources and receive an acknowledgement, ACK, indicator from the BS indicating that the BS successfully received the small data transmission, wherein the UE is in a deactivated state when performing the small data transmission. Drawings Aspects of the disclosure are best understood from the following description when read in conjunction with the accompanying drawing figures. The various features are not drawn to scale. The size of the various features may be arbitrarily increased or decreased for clarity of discussion. Fig. 1 illustrates a 2-step RACH procedure formed of a 4-step RACH procedure according to an exemplary embodiment of the present disclosure. Fig. 2 illustrates a fallback RAR format according to an exemplary embodiment of the present disclosure. Fig. 3 illustrates a successful RAR format according to an exemplary embodiment of the present disclosure. Fig. 4 illustrates a successful RAR MAC sub-header format according to an exemplary embodiment of the present disclosure. Fig. 5 illustrates a new RAR format according to an exemplary embodiment of the present disclosure. Fig. 6 illustrates a modified successRAR format according to an exemplary embodiment of the present disclosure. Fig. 7 illustrates a small data transmission procedure performed by a UE according to an exemplary embodiment of the present disclosure. Fig. 8 illustrates a block diagram of a node for wireless communication according to an exemplary embodiment of the present disclosure. Detailed Description The following contains specific information related to exemplary embodiments in the present disclosure. The drawings in the present disclosure and their accompanying detailed disclosure are directed to merely exemplary embodiments. However, the present disclosure is not limited to only these exemplary embodiments. Other variations and embodiments of the present disclosure will occur to those skilled in the art. Unless otherwise indicated, identical or corresponding elements in the drawings may be denoted by identical or corresponding reference numerals. Moreover, the drawings and illustrations in the present disclosure are generally not drawn to scale and are not intended to correspond to actual relative d