Methods and apparatus for transmission of uplink sounding reference signals in a communication system with large number of antennas

摘要

Methods for preventing timing collisions in a wireless communication network include transmitting a data uplink symbol of normal duration via a first base pair using a first timing advance (TA) corresponding to the first base pair. Scheduling to transmit a second uplink symbol via a second base pair (BP) corresponding to the transmit RF chain. Predicting a timing collision will occur based on a different between the first TA and a second TA corresponding to the second BP. Preventing the timing collision by: reducing the duration of the second symbol by an adjustment amount calculated based on the first TA and the second TA; inserting a guard interval to delay transmission of the second symbol by the calculated adjustment amount; and increasing the duration of a cyclic prefix of the second symbol but refraining from transmitting a portion of the enlarged CP.

主权项

1. A method for preventing timing collisions in a wireless communication network, the method comprising:
generating a first symbol for uplink transmission using a first beam pair between a mobile station and a base station; scheduling a transmission of the first symbol to the base station through the first beam pair to commence at a first time and to end the transmission of the first symbol at a second time subsequent to the first time; generating a sounding reference signal (SRS) for uplink transmission using a second beam pair different from the first beam pair; scheduling a transmission of the SRS to the base station to commence at the second time; determining a first timing advance corresponding to the first base pair; determining a second timing advance corresponding to the second base pair; transmitting the first symbol through the first beam pair at an initial time in advance of the first time by an amount of the first timing advance; determining a third time in advance of the second time by an amount of a second timing advance; calculating and applying an adjustment amount to one of: delay the transmission of the SRS by rescheduling the transmission of the SRS to commence at a delayed time subsequent to the second time, and modify a duration of the SRS; and transmitting one of: the delayed SRS through the second beam pair at a fourth time in advance of the delayed time by an amount of the second timing advance corresponding to the second beam pair, and the modified SRS through the second beam pair at a fifth time that is subsequent to the third time and in advance of the second time.