Method, apparatus and system for controlling distributed antenna system
AssigneeIndustrial Technology Research Institute
InventorsHung-Hsiang Wang, Hsin-An Hou
Life of this patent
Estimating the term…
Abstract
A method for controlling a distributed antenna system includes the following steps. A target propagation delay value is defined according to a transmit/receive transition gap. Propagation delay time of a service antenna unit corresponding to a base station is estimated. The service antenna unit is turned on to perform downlink signal transmission, and the propagation delay time of the service antenna unit is compensated to the target propagation delay value.
Claims21
A method for controlling a distributed antenna system comprising a control device, comprising:
- the control device,
- defining a target propagation delay value according to a transmit/receive transition gap;
- estimating a propagation delay time of a service antenna unit corresponding to a base station;
- and
- turning on the service antenna unit to perform downlink signal transmission through the service antenna unit, and compensating the propagation delay time of the service antenna unit to the target propagation delay value.
A method for controlling a distributed antenna system comprising a control device, the method comprising:
- the control device,
- determining a target delay variation value, and defining a target propagation delay value according to a transmit/receive transition gap;
- acquiring respective propagation delay time of a plurality of remote antenna units corresponding to a base station to obtain respective delay compensation value of the plurality of remote antenna units by referring to the target propagation delay value;
- and
- compensating a service antenna unit according to corresponding delay compensation value when one of the plurality of remote antenna units are turned on to be the service antenna unit to perform downlink signal transmission;
- wherein a compensated propagation delay time of each remote antenna unit does not exceed the target propagation delay value, and the compensated propagation delay time is a sum of the respective propagation delay time and the respective delay compensation value;
- wherein when different remote antenna units are switched to be the service antenna unit, a compensated propagation delay time variance of the service antenna unit caused by switching does not exceed the target delay variation value.
A method for controlling a distributed antenna system comprising a control device, the method comprising:
- a control device,
- estimating respective propagation delay time of a plurality of remote antenna units corresponding to a base station;
- selecting one of the plurality of remote antenna units to be a service antenna unit according to a target propagation delay value and the propagation delay time of the plurality of remote antenna units, and obtaining a delay compensation value corresponding to the service antenna unit;
- turning on or turning off downlink signal transmission of the plurality of remote antenna units;
- and
- compensating the service antenna unit according to corresponding delay compensation value when the service antenna unit is turned on.
A system for controlling a distributed antenna system, comprising:
- a base station;
- an estimation module for estimating respective propagation delay time of a plurality of remote antenna units corresponding to the base station;
- a first control module for selecting one of the plurality of remote antenna units to be a service antenna unit according to a target propagation delay value and the propagation delay time of the plurality of remote antenna units, and obtaining delay compensation values corresponding to the plurality of remote antenna units;
- and
- a second control module, controlled by the first control module, for turning on or turning off downlink signal transmission of the plurality of remote antenna units;
- wherein when the first control module selects the service antenna unit according to the target propagation delay value and the propagation delay time of the plurality of remote antenna units, the base station obtains delay compensation value of the service antenna unit and transmits to a subscriber station, so that the subscriber station adjusts uplink transmission time according to a received delay compensation value.
Dependencies are inferred from the claim text.