Switching sub-system for distributed antenna systems using time division duplexing

US9271289B2 · kind B2 · utility

Assignee

• Andrew Wireless Systems GmbH · DE

Inventors

• Daniel Schwab · Gersthofen, DE
• Thomas Kummetz · Kissing, DE
• Alfons Dussmann · Gansheim, DE

Key dates

• Filing date: Oct 30, 2013
• Grant date: Feb 23, 2016
• Expiry date: Oct 30, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J3/0685
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A switching control module can optimize time division duplexing operations of a distributed antenna system (“DAS”). The switching control module can include a measurement receiver and a processor. The measurement receiver can measure signal powers of downlink signals in a downlink path of the DAS. The processor can determine start times for downlink sub-frames transmitted via the downlink path based on downlink signal powers measured by the measurement receiver exceeding a threshold signal power. The processor can identify a clock setting that controls a timing of switching signals used for switching the DAS between an uplink mode and a downlink mode. The processor can statistically determine a switching time adjustment for the clock setting based on switching time differentials between the clock setting and the start times. The processor can update the clock setting based on the switching time adjustment.