Redundancy in a public safety distributed antenna system
AssigneeDali Systems Co. Ltd.
InventorsSasa Trajkovic, Andrew Leung
Life of this patent
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Abstract
A redundancy system for data transport in a Distributed Antenna System (DAS) includes a plurality of Digital Access Units (DAUs). Each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs. The redundancy system also includes a plurality of Digital Distribution Units (DDUs). Each of the plurality of DDUs is in communication with each of the plurality of DAUs using cross connection communication paths. The redundancy system further includes a plurality of Digital Remote Units (DRUs). Each of the plurality of DRUs is in communication with each of the plurality of DDUs using cross connection communications paths.
Claims17
A redundancy system for data transport in a Distributed Antenna System (DAS), the redundancy system comprising:
- a plurality of Digital Access Units (DAUs), wherein each of the plurality of DAUs is fed by a plurality of data streams and is operable to transport digital signals between others of the plurality of DAUs;
- a plurality of Digital Distribution Units (DDUs), each of the plurality of DDUs being in communication with two or more of the plurality of DAUs using a first set of cross-connection communication paths;
- a plurality of Digital Remote Units (DRUs), each of the plurality of DRUs being in communication with two or more of the plurality of DDUs using a second set of cross-connection communications paths;
- and
- at least one digital signal processor (DSP) unit that:
- determines whether a signal quality for at least one data stream in the plurality of data streams is below a signal quality threshold, and
- in response to the determination, redirects one or more data streams in the plurality of data streams.
A Distributed Antenna System (DAS) comprising:
- a primary integrated digital access unit (DAU) having a set of primary integrated input ports, a first primary integrated output port, and a second primary integrated output port;
- a secondary integrated DAU having a set of secondary integrated input ports, a first secondary integrated output port, and a second secondary integrated output port;
- a connection between the primary integrated DAU and the secondary integrated DAU;
- a first digital distribution unit (DDU) having:
- a first DDU input port coupled to the first primary integrated output port
- a second DDU input port coupled to the first secondary integrated output port;
- a first DDU output port;
- and
- a second DDU output port;
- a second DDU having:
- a third DDU input port coupled to the second primary integrated output port;
- and
- a fourth DDU input port coupled to the second secondary integrated output port;
- a third DDU output port;
- and
- a fourth DDU output port;
- a first digital remote unit (DRU) having:
- a first DRU input port coupled to the first DDU output port;
- a second DRU input port coupled to the third DDU output port and
- a first DRU radio frequency (RF) output port;
- a second digital remote unit having:
- a third DRU input port coupled to the second DDU output port;
- a fourth DRU input port coupled to the fourth DDU output port;
- and
- a second DRU RF output port;
- and
- at least one digital signal processor (DSP) unit that:
- determines whether a signal quality for a first data stream in a plurality of data streams transported via the DAS is below a signal quality threshold;
- and
- in response to the determination, redirects a second data stream in the plurality of data streams.
Dependencies are inferred from the claim text.