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EP-4738969-A1 - METHOD AND APPARATUS IN NODE FOR WIRELESS COMMUNICATION

EP4738969A1EP 4738969 A1EP4738969 A1EP 4738969A1EP-4738969-A1

Abstract

A method and device for use in nodes of wireless communication to reduce resource consumption of multiple PRACH retransmissions. The method includes: transmitting X1 first random access (RA) preambles, X1 being a positive integer greater than 1; monitoring a control signaling for a first random access response (RAR) within a first time-window, the first RAR corresponding to the X1 first RA preambles; and increasing a current value of a first counter by X2 to obtain an updated value of the first counter in response to the first RAR being unsuccessfully received at the expiration of the first time-window, where X2 is a positive integer greater than or equal to X1. A magnitude relationship between the updated value of the first counter and a first threshold is configured to determine whether to transmit X2 second RA preambles, the first threshold being configured by higher layer signaling.

Inventors

  • LYU, Ling
  • ZHAO, ZHENG
  • YANG, Zhongzhi

Assignees

  • Quectel Wireless Solutions Co., Ltd.

Dates

Publication Date
20260506
Application Date
20230630

Claims (20)

  1. A method for use in a first node of wireless communication, comprising: transmitting X1 first random access (RA) preambles, X1 being a positive integer greater than 1; monitoring a control signaling for a first random access response (RAR) within a first time-window, the first RAR corresponding to the X1 first RA preambles; and increasing a current value of a first counter by X2 to obtain an updated value of the first counter in response to the first RAR being unsuccessfully received at the expiration of the first time-window, wherein X2 is a positive integer greater than or equal to X1; wherein a magnitude relationship between the updated value of the first counter and a first threshold is configured to determine whether to transmit X2 second RA preambles, the first threshold being configured by higher layer signaling.
  2. The method of claim 1, comprising: transmitting the X2 second RA preambles in response to the updated value of the first counter being less than the first threshold; and skipping transmitting the X2 second RA preambles in response to the updated value of the first counter being greater than the first threshold.
  3. The method of claim 1 or 2, comprising: increasing a current value of a second counter by 1 to obtain an updated value of the second counter, wherein a magnitude relationship between the updated value of the second counter and a sum of a second threshold plus 1 is configured to determine whether to transmit the X2 second RA preambles, or whether the updated value of the second counter and the sum of the second threshold plus 1 are equal is configured to determine whether to transmit the X2 second RA preambles, the second threshold being configured by higher layer signaling.
  4. The method of claim 3, comprising: setting an initial value of the second counter to 1, wherein the initial value of the second counter is less than or equal to the current value of the second counter.
  5. The method of claim 3 or 4, comprising: transmitting the X2 second RA preambles in response to the updated value of the first counter being less than the first threshold and the updated value of the second counter being not equal to the sum of the second threshold plus 1; and skipping transmitting the X2 second RA preambles in response to the updated value of the first counter being greater than the first threshold or the updated value of the second counter being equal to the sum of the second threshold plus 1.
  6. The method of claim 3 or 4, comprising: indicating a RA problem to an upper layer in response to the updated value of the second counter being equal to the sum of the second threshold plus 1.
  7. The method of any of claims 1 to 6, comprising: setting an initial value of the first counter to X0, wherein X0 is a positive integer greater than 1, and the initial value of the first counter is less than or equal to the current value of the first counter; and selecting X0 physical random access channel (PRACH) occasions (ROs); wherein the X0 ROs are configured for a first RA procedure.
  8. The method of any of claims 1 to 7, comprising: indicating a RA problem to an upper layer in response to the updated value of the first counter being greater than the first threshold.
  9. The method of any of claims 1 to 8, comprising: stopping the first time-window in response to the first RAR being successfully received within the first time-window.
  10. The method of any of claims 1 to 9, comprising: receiving first information, wherein the first information is configured to determine a plurality of candidate values, the plurality of candidate values including X1 and X2.
  11. A method for use in a second node of wireless communication, comprising: performing reception of X1 first random access (RA) preambles, X1 being a positive integer greater than 1; and determining whether to transmit a control signaling for a first random access response (RAR) according to the reception of the X1 first RA preambles within a first time-window, wherein the first RAR corresponds to the X1 first RA preambles; wherein in response to the control signaling for the first RAR being not successfully transmitted at the expiration of the first time-window, a magnitude relationship between a updated value of a first counter of a first node transmitting the X1 first RA preambles and a first threshold is configured to determine whether to perform reception of X2 second RA preambles, X2 being a positive integer greater than or equal to X1, and the first threshold being configured by higher layer signaling.
  12. The method of claim 11, comprising: performing the reception of the X2 second RA preambles in response to the updated value of the first counter is less than the first threshold; and skipping performing the reception of the X2 second RA preambles in response to the updated value of the first counter being greater than the first threshold.
  13. The method of claim 11 or 12, wherein: a magnitude relationship between an updated value of a second counter of the first node and a sum of a second threshold plus 1 is configured to determine whether to perform the reception of the X2 second RA preambles, or whether the updated value of the second counter of the first node is equal to a sum of the second threshold plus 1 is configured to determine whether to perform the reception of the X2 second RA preambles, the second threshold being configured by higher layer signaling.
  14. The method of claim 13, comprising: performing the reception of the X2 second RA preambles in response to the updated value of the first counter being less than the first threshold and the updated value of the second counter is not equal to the sum of the second threshold plus 1; and skipping performing the reception of the X2 second RA preambles in response to the updated value of the first counter is greater than the first threshold or the updated value of the second counter is equal to the sum of the second threshold plus 1.
  15. The method of any of claims 11 to 14, comprising: stopping the first time-window, in response to the control signaling for the first RAR being transmitted successfully within the first time-window.
  16. The method of any of claims 11-15, comprising: transmitting first information, the first information being configured to determine a plurality of candidate values, the plurality of candidate values including X1 and X2.
  17. A first node for wireless communication, comprising: a first transmitter configured to transmit X1 first random access (RA) preambles, X1 being a positive integer greater than 1; a first receiver configured to monitor a control signaling for a first random access response (RAR) within a first time-window, the first RAR corresponding to the X1 first RA preambles; and a first counter configured to increase a current value of the first counter by X2 to obtain an updated value of the first counter in response to the first RAR being unsuccessfully received at the expiration of the first time-window, wherein X2 is a positive integer greater than or equal to X1; wherein a magnitude relationship between the updated value of the first counter and a first threshold is configured to determine whether to transmit X2 second RA preambles, the first threshold being configured by higher layer signaling.
  18. The first node of claim 17, wherein the first transmitter is further configured to: transmit the X2 second RA preambles in response to the updated value of the first counter being less than the first threshold; and skip transmitting the X2 second RA preambles in response to the updated value of the first counter being greater than the first threshold.
  19. The first node of claim 17 or 18, wherein the first node further comprises: a second counter configured to increase a current value of the second counter by 1 to obtain an updated value of the second counter, wherein a magnitude relationship between the updated value of the second counter and a sum of a second threshold plus 1 is configured to determine whether to transmit the X2 second RA preambles, or whether the updated value of the second counter and the sum of the second threshold plus 1 are equal is configured to determine whether to transmit the X2 second RA preambles, the second threshold being configured by higher layer signaling.
  20. The first node of claim 19, wherein: the second counter is further configured to set an initial value of the second counter to 1, wherein the initial value of the second counter is less than or equal to the current value of the second counter.

Description

TECHNICAL FIELD The various embodiments described in this document relate in general to the technical field of communications and more particularly to a method and device for use in nodes of wireless communication. BACKGROUND In order to enhance the coverage performance of random access, some communication systems (e.g., new radio (NR) systems) plan to introduce retransmissions based on multiple physical random access channel (PRACH) transmissions, and to increase the number of PRACH transmissions in retransmissions. However, increasing the number of PRACH transmissions of the multiple PRACH transmissions in retransmissions may consume additional time-frequency resources, and may also increase the collision probability of PRACH preambles. In this case, how to allocate resources for multiple PRACH retransmissions, and how to balance the resource consumption of the multiple PRACH retransmissions and the effectiveness of random access have become problems to be solved. SUMMARY Embodiments of the present disclosure provide a method and device for use in nodes of wireless communication. Various aspects of the present disclosure are described below. According to a first aspect, embodiments of the disclosure provide a method for use in a first node of wireless communication, including: transmitting X1 first random access (RA) preambles, X1 being a positive integer greater than 1; monitoring a control signaling for a first random access response (RAR) within a first time-window, the first RAR corresponding to the X1 first RA preambles; and increasing a current value of a first counter by X2 to obtain an updated value of the first counter in response to the first RAR being unsuccessfully received at the expiration of the first time-window, where X2 is a positive integer greater than or equal to X1. A magnitude relationship between the updated value of the first counter and a first threshold is configured to determine whether to transmit X2 second RA preambles, the first threshold being configured by higher layer signaling. As an implementation, the X2 second RA preambles are transmitted in response to the updated value of the first counter being less than the first threshold, and the X2 second RA preambles are not transmitted in response to the updated value of the first counter being greater than the first threshold. As an implementation, a current value of a second counter is increased by 1 to obtain an updated value of the second counter, where a magnitude relationship between the updated value of the second counter and a sum of a second threshold plus 1 is configured to determine whether to transmit the X2 second RA preambles, or whether the updated value of the second counter and the sum of the second threshold plus 1 are equal is configured to determine whether to transmit the X2 second RA preambles, the second threshold being configured by higher layer signaling. As an implementation, an initial value of the second counter is set to 1, where the initial value of the second counter is less than or equal to the current value of the second counter. As an implementation, the X2 second RA preambles are transmitted in response to the updated value of the first counter being less than the first threshold and the updated value of the second counter being not equal to the sum of the second threshold plus 1. The X2 second RA preambles are not transmitted in response to the updated value of the first counter being greater than the first threshold or the updated value of the second counter being equal to the sum of the second threshold plus 1. As an implementation, a RA problem is indicated to an upper layer in response to the updated value of the second counter being equal to the sum of the second threshold plus 1. As an implementation, an initial value of the first counter is set to X0, where X0 is a positive integer greater than 1, and the initial value of the first counter is less than or equal to the current value of the first counter. X0 physical random access channel (PRACH) occasions (ROs) are selected. The X0 ROs are configured for a first RA procedure. As an implementation, a RA problem is indicated to an upper layer in response to the updated value of the first counter being greater than the first threshold. As an implementation, the first time-window is stopped in response to the first RAR being successfully received within the first time-window. As an implementation, first information is received, where the first information is configured to determine a plurality of candidate values, the plurality of candidate values including X1 and X2. According to a second aspect, a method for use in a second node of wireless communication is provided. The method includes: performing reception of X1 first random access (RA) preambles, X1 being a positive integer greater than 1; and determining whether to transmit a control signaling for a first random access response (RAR) according to the reception of the X1 first RA pre