Patent ID: 8559868

Claim:
A system for one cell to cover multiple areas, comprising: a base station which comprises a baseband unit (BBU), wherein the BBU of the base station is connected with multiple radio frequency (RF) groups through multiple data channels, the multiple RF groups belong to the same cell, and each of the multiple RF groups corresponds to an area in the cell and corresponds to one of the multiple data channels; and each of the multiple RF groups configured to: receive uplink signals sent from a user equipment (UE) in a corresponding area, send the uplink signals to the BBU through one of the multiple data channels corresponding to one of the multiple RF groups, receive downlink signals through a corresponding data channel and send the downlink signals to the UE in the corresponding: wherein the BBU comprises: multiple searchers, each searcher corresponds to a data channel, configured to search for the uplink signals on the corresponding data channel, and send the uplink signals to a signal processing unit when finding the uplink signals on the data channel; and the signal processing unit configured to process the uplink signals sent from the searchers; and wherein the BBU further comprises: a storing module, configured to record identifier information of a data channel that bears the uplink signals according to the uplink signals found by the searchers; a downlink control module, configured to determine the data channel corresponding to the downlink signals to be sent according to information in the downlink signals and according to the recorded identifier information of the data channel that bears the uplink signals, and send a control information of the data channel corresponding to the downlink signals to a downlink sending module; and the downlink sending module, configured to send the downlink signals through the corresponding data channel according to the received control information.