US 9,872,189 B2Granted

Systems and methods for determining asymmetric downlink and uplink propagation delays in a wireless distribution system (WDS) for more accurately determining propagation delay

AssigneeCorning Optical Communications Wireless Ltd

InventorDror Harel

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Abstract

Embodiments of the disclosure relate to systems and methods for determining asymmetric downlink and uplink propagation delays in a wireless distribution system (WDS) for more accurately determining propagation delay. In this regard, a WDS is configured to determine both the separate downlink and uplink propagation delays between a central unit and a plurality of remote units. It is not presumed that the downlink propagation delay and the uplink propagation delay in the WDS are symmetric to provide a more accurate determination of propagation delay. Therefore, it is possible to determine the downlink and uplink propagation delays with improved accuracy, thus enabling more precise location identification in the WDS.

Claims25

Dependent claims

A wireless distribution system (WDS), comprising:

at least one first remote unit comprising a first transmit (TX) antenna and a first receive (RX) antenna;
at least one second remote unit comprising a second TX antenna and a second RX antenna;
a central unit communicatively coupled to the at least one first remote unit and the at least one second remote unit, the central unit comprises an input/output (I/O) interface configured to receive a modulated signal from a signal source;
and
a controller configured to determine:
a first downlink propagation delay between the I/O interface and the at least one first remote unit,
a first uplink propagation delay between the I/O interface and the at least one first remote unit;
a second downlink propagation delay between the I/O interface and the at least one second remote unit;
a second uplink propagation delay between the I/O interface and the at least one second remote unit;
and
a remote unit-to-remote unit (RU-to-RU) propagation delay from the first TX antenna to the second RX antenna and from the second TX antenna to the first RX antenna.

8 more elements

Dependencies are inferred from the claim text.