Uplink transmission method and user equipment

A user equipment, comprising:

• a sending unit configured to send a plurality of preamble signals to a network device;
• a receiving unit, configured to receive a feedback signal of the network device in response to the plurality of preamble signals, wherein the feedback signal in response to each preamble signal carries a plurality of timing advances (TA)s;
• a processing unit configured to:
• determine a valid TA from the plurality of received TAs collected within a predetermined sliding time window, wherein if a maximum difference between every two of N TAs, from the plurality of received TAs, is less than or equal to a preset first threshold, determining that the N TAs are all valid TAs, wherein M1 largest values and M2 smallest values of the N TA values are removed to obtain an average value of remaining TA values, wherein if a difference between a TA and the average value is less than a preset second threshold, determining that the TA value is a valid TA value, wherein M1>0, M2>0;
• determine a parameter used for uplink transmission, based on a feedback signal carrying the valid TA or a preamble signal corresponding to the valid TA;
• and
• process uplink data based on the parameter to obtain an uplink signal;
• and
• wherein the sending unit is configured to send the uplink signal.

A non-transitory machine readable medium comprising instructions that cause a data processing system to perform an uplink transmission method comprising:

• sending a plurality of preamble signals to a network device;
• receiving a feedback signal of the network device in response to the plurality of preamble signals, wherein the feedback signal in response to each preamble signal carries a plurality of timing advances (TA)s;
• determining a valid TA from the plurality of received TAs collected within a predetermined sliding time window, including:
• if a maximum difference between every two of N TAs, from the plurality of received TAs, is less than or equal to a preset first threshold, determining that the N TAs are all valid TAs,
• removing M1 largest values and M2 smallest values of the N TA values to obtain an average value of remaining TA values, wherein if a difference between a TA and the average value is less than a preset second threshold, determining that the TA value is a valid TA value, wherein M1>0, M2>0;
• determining a parameter used for uplink transmission based on a feedback signal carrying the valid TA or a preamble signal corresponding to the valid TA;
• and
• sending uplink data according to the parameter.