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US 9,179,321 B2Granted
Digital capacity centric distributed antenna system
AssigneeAxell Wireless Ltd.
InventorsAbraham Hasarchi, Amir Meir, Michael John George Lewis
Life of this patent
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Abstract
Disclosed herein is an architecture for a Digital Capacity Centric Distributed Antenna System (DCC-DAS) that dynamically manages and distributes resources in different locations where there is demand for capacity. The DCC-DAS also allows for the routing of resources to other applications such as location finding devices, jamming devices, repeaters, etc.
Claims27
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.
11 more elements
Digital distributed antenna system (DAS) comprising:
- a plurality of remote radio units (RRUs) in communication with mobile devices;
- a plurality of base transceiver stations (BTS's);
- a central hub coupled to the RRUs and the BTS's;
- and
- a digital filter bank comprising one or more digital titters,
- each digital filter being matched to a unique cell resource, a cell resource including a band of contiguous frequencies within a frequency spectrum and including at least one or more downlink signals being received from one or more of the BTS's, and
- each digital filter being matched to a unique cell resource, a cell resource including a band of frequencies within a frequency spectrum and including at least one or more signals being received from one or more mobile devices;
- wherein, in a downlink direction, the DAS multiplexes one or more downlink signals and further comprises a digitizing module for digitizing any downlink si mal that is an analog RF signal, and filters the digital one or more downlink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering,
- wherein the central hub routes the resulting digitized filtered cell resources to one or more RRUs according to pre-programmed routines in the central hub to provide individual routing of each cell resource to RRUs for transmission to their mobile devices,
- wherein, in an uplink direction, the DAS multiplexes one or more uplink RE signals, digitizes the one or more uplink signals, and filters the digitized one or more uplink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering, and
- wherein the central hub routes the resulting digitized filtered cell resources to one or more BTS's according to pre-programmed routines in the central hub to provide individual routing of each cell resource to BTS's,
- wherein each RRU is coupled to the central hub via a transceiver, and
- the central hub provides warning to an operator whenever a rerouting process exceeds a capacity constraint of each individual transceiver.
10 more elements
A method for routing cell resources through a central digital hub of a digital distributed antenna system (DAS), said central digital hub is coupled to a plurality of remote radio units (RRUs) and to output ports of a plurality of base transceiver stations (BTS's), in a downlink direction the method comprising:
- receiving and multiplexing one or more downlink signals from one or more base transceiver stations (BTS's), and, if the downlink signals are analog RF signals, digitizing the analog RF signals before multiplexing them;
- filtering the one or more digital downlink signals on a cell resource basis using a downlink digital filter bank comprising one or more downlink digital filters, each downlink digital filter being matched to a unique cell resource,
- a cell resource including a band of contiguous frequencies within a frequency spectrum owned b an operator and including at least one or more downlink RF signals being received from one or more of the BTS's in a downlink direction, and including at least one or more signals being received from one or more mobile devices in an uplink direction;
- routing the filtered downlink cell resources to a plurality of RRUs according to software programmable routines in the central digital hub to provide individual routing for each cell resource to the plurality of RRUs for transmission to connected mobile devices, there being at least two separate and distinct cell resources;
- and, in an uplink direction, the method comprising:
- at each RRU,
- receiving one or more uplink RF signals from one or more mobile devices;
- digitizing the one or more uplink signals;
- filtering the one or more uplink signals on a cell resource basis using an uplink digital filter bank comprising a plurality of uplink digital filters, each uplink digital filter being matched to a unique cell resource;
- and
- routing the filtered cell resources through the central digital hub to one or more BTS's according to routines in the central digital hub.
8 more elements
Dependencies are inferred from the claim text.