Commscope Technologies LLC

Outdoor Wireless Networks LLC

Sudarshana Varadappa

Suresh N Sriram

Suresh Natarajan Sriram

Syamala Saripalli

Emil Mathew Kadavil

Narayana Reddy Korimilla

Yogesh C S

Techniques for reducing downlink data and/or uplink data transported in a distributed antenna system (DAS) are provided. Time domain data is transformed into a frequency domain. In the DAS, on a PRB-by-PRB basis, whether each of frequency-domain downlink digital data and frequency-domain uplink digital data comprise a meaningful signal is determined. Each of the frequency-domain downlink digital data and the frequency-domain uplink digital data comprising valid PRBs are subsequently transported in the DAS. Other techniques are disclosed for utilizing O-RAN user plane messages and corresponding O-RAN control plane messages in fronthaul transport of a distributed antenna system (DAS) to reduce bandwidth consumption and simplify management of the DAS. Bandwidth consumption in the fronthaul transport of the DAS is diminished by only transporting IQ data having a valid signal.

Techniques about converting time-domain fronthaul data to frequency-domain fronthaul data within a distributed antenna system

A distributed radio access network (RAN) includes a plurality of remote units (RUs) communicatively coupled to a centralized unit. During each of at least one measurement iteration: one of the plurality of RUs is selected as a transmit-mode RU and all other of the plurality of RUs are in receive-mode; the transmit mode-RU transmits a known pattern signal to the receive-mode RUs; and each receive-mode RU determines a frame or symbol boundary difference between when the transmit-mode RU transmitted the known pattern signal and when the respective receive-mode RU received the known pattern signal. Following the at least one measurement iteration: the centralized unit determines a respective timing offset based on each frame or symbol boundary difference; the centralized unit determines a common alignment point for the RUs based on the timing offsets; and each RU's timing is adjusted to align with the common alignment point.

Over-the-air timing alignment compensation in a distributed radio access network

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Bengaluru, India

Sudarshana Varadappa