Wireless communication system

摘要

A wireless communication system base station, and a remote radio head (RRH) and a computer-implemented synchronization method for the wireless communication system base station. The RRH is communicably coupled to a baseband unit (BBU) of the wireless communication system base station through a network, and the BBU processes and transmits downlink data to the RRH. The RRH includes: a time-delay measurement unit for measuring a time-delay for the downlink data to arrive at the RRH from the BBU; and a time-delay notification unit for notifying from the RRH to the BBU of time-delay data on the time-delay measured by the time-delay measurement unit, wherein the time-delay data is used to advance the starting time for the BBU to process and transmit the downlink data by an amount of time obtained based on the time-delay data.

主权项

1. A remote radio head (RRH) for a wireless communication system base station, wherein the RRH is communicably coupled to a baseband unit (BBU) of the wireless communication system base station through a network, and wherein the BBU processes and transmits downlink data to the RRH, the RRH comprising:
a time-delay measurement unit for measuring a time-delay for the downlink data to arrive at the RRH from the BBU; a time-delay notification unit for notifying from the RRH to the BBU of time-delay data on the time-delay measured by the time-delay measurement unit; wherein the time-delay data is used to advance the starting time for the BBU to process and transmit the downlink data by an amount of time obtained based on the time-delay data; a digital to analog (D/A) converter for transmitting the downlink data to a wireless communication device; wherein the time-delay measurement unit comprises a frame header time-delay measurement means for measuring a first time difference Td1 between the time when the D/A converter begins to transmit the downlink data to the wireless communication device and the time when a first data sample of a data frame of the downlink data arrives at the RRH, wherein the time-delay data comprises the first time difference Td1; a downlink unit for receiving downlink data from the BBU; and a pulse generator for generating a downlink pulse TDL for triggering the D/A converter to transmit downlink data to the wireless communication device; wherein the frame header time-delay measurement means comprises means for measuring the first time difference Td1 between the time when the downlink pulse TDL is generated and the time when the first data sample of the downlink frame from the BBU arrives at the downlink unit.