Patent ID: 9179321
Filing Date: 2015-11-03
Classification: H04B,H04K,H04W

Abstract:
1. A digital distributed antenna system (DAS) for coupling to output ports of a plurality of base transceiver stations (BTS's) comprising: a plurality of remote radio units (RRUs) in communication with mobile devices; a central digital hub for routing and processing digital RF signals, wherein the central digital hub is coupled to the RRUs and to the BTS's; at least one uplink digital filter bank comprising a plurality of uplink digital fitters, such digital filter bank in the plurality of the RRUs; and at least one downlink digital filter bank comprising a plurality of downlink digital filters, each of the plurality of downlink digital filters being matched to a unique cell resource, a cell resource comprising a band of contiguous frequencies within a frequency spectrum owned by an operator, and each cell resource including at least one or more downlink signals being received from one or more of the BTS's, and each of the plurality of uplink digital filters being matched to a unique cell resource, each cell resource including at least one or more signals being received from one or more mobile devices in an uplink direction, there being at least two separate and distinct cell resources; wherein, in the downlink direction, the DAS multiplexes one or more downlink signals and further comprises a digitizing module for digitizing any downlink signal that is an analog RF signal, wherein the DAS filters the digital one or more downlink signals on a cell resource basis with the downlink digital filter bank and allocates an individual routing path to each of the downlink cell resources to one or more RRUs, wherein each downlink digital filter is allocated a distinct individual transfer function to match the cell resource it is filtering, and wherein the routing of each digital downlink cell resource is performed according to software programmable routines in the central digital hub to provide individual routing for each downlink cell resource to one or more RRUs for transmission to connected mobile devices, wherein, in the uplink direction, the one or more RRUs receive one or more uplink RF signals, digitizes the one or more uplink signals, filters the digitized one or more uplink signals on a cell resource basis with the uplink digital filter bank, wherein each uplink digital filter is allocated a distinct individual transfer function to match the cell resource it is filtering, and wherein the central digital hub allocates an individual routing path to each of the digitized uplink cell resources to an individual BTS according to software programmable routines in the central digital hub to provide individual routing of path for each cell resource to a BTS.