Timing advance indication method, base station, UE and device

A timing advance indication method applied for a base station, comprising:

• transmitting subcarrier spacing configuration information of a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH) to a terminal;
• receiving a preamble fed back by the terminal based on the subcarrier spacing configuration information;
• obtaining a quantized value of a timing advance corresponding to a tracking area based on the preamble;
• and
• transmitting the quantized value of the timing advance to the terminal;
• wherein the obtaining the quantized value of the timing advance corresponding to the tracking area based on the preamble comprises:
• estimating a reference timing advance corresponding to the tracking area based on the preamble of a physical random access channel (PRACH) transmitted by the terminal;
• and
• obtaining the quantized value of the timing advance based on the reference timing advance and the subcarrier spacing configuration information;
• wherein the obtaining the quantized value of the timing advance based on the reference timing advance and the subcarrier spacing configuration information comprises:
• obtaining a time quantization unit of the timing advance based on the subcarrier spacing configuration information;
• and
• obtaining the quantized value of the timing advance based on the reference timing advance and the time quantization unit of the timing advance;
• wherein the obtaining the quantized value of the timing advance based on the reference timing advance and the time quantization unit of the timing advance comprises:
• determining a target conversion value M based on a ratio of the reference timing advance T to a sampling spacing;
• and
• determining the quantized value K of the timing advance based on the target conversion value M and the time quantization unit N of the timing advance.

A timing advance indication method applied to a terminal, comprising:

• receiving subcarrier spacing configuration information of a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH) transmitted by a base station;
• feeding back a preamble to the base station based on the subcarrier spacing configuration information;
• receiving a quantized value of a timing advance corresponding to a tracking area obtained based on the preamble and transmitted by a base station;
• and
• determining a target timing advance based on the quantized value of the timing advance and the subcarrier spacing configuration information, and performing uplink timing adjustment;
• wherein the determining the target timing advance based on the quantized value of the timing advance and the subcarrier spacing configuration information and performing uplink timing adjustment comprises:
• obtaining a time quantization unit N of the timing advance based on the subcarrier spacing configuration information;
• determining a target timing advance F based on the time quantization unit N of the timing advance and the quantized value K of the timing advance;
• and
• performing uplink timing adjustment based on the target timing advance F;
• wherein before the obtaining the time quantization unit N of the timing advance based on the subcarrier spacing configuration information, the method further comprises:
• determining one or more timing advance groups configured by the base station for the terminal;
• wherein each of the timing advance groups comprises one or more component carriers configured for the terminal;
• the obtaining the time quantization unit N of the timing advance based on the subcarrier spacing configuration information comprises:
• obtaining the time quantization unit N of the timing advance corresponding to each of the timing advance groups based on the subcarrier spacing configuration information of uplink bandwidth portions of one or more component carriers included in each of the timing advance groups;
• wherein the obtaining the time quantization unit N of the timing advance corresponding to each of the timing advance groups based on the subcarrier spacing configuration information of uplink bandwidth portions of one or more component carriers included in each of the timing advance groups comprises:
• obtaining a maximum value of subcarrier spacing of all PUSCHs and/or PUCCHs of uplink bandwidth portions of all component carriers included in each of the timing advance groups based on subcarrier spacing configuration information of uplink bandwidth portions of one or more component carriers included in each of the timing advance groups;
• and
• obtaining the time quantization unit N of the timing advance corresponding to each of the timing advance groups based on the maximum value of the subcarrier spacing;
• or,
• wherein the obtaining the time quantization unit N of the timing advance corresponding to each of the timing advance groups based on the subcarrier spacing configuration information of uplink bandwidth portions of one or more component carriers included in each of the timing advance groups comprises:
• obtaining a maximum value of the subcarrier spacing of all PUSCH and/or PUCCH of all activated uplink bandwidth parts of all component carriers included in each of the timing advance groups based on subcarrier spacing configuration information of uplink bandwidth parts of one or more component carriers included in each of the timing advance groups;
• and
• obtaining the time quantization unit of the timing advance corresponding to each of the timing advance groups is obtained based on the maximum value of the subcarrier spacing.