公开(公告)号：US20210409119A1

公开(公告)日：2021-12-30

申请号：US17366686

申请日：2021-07-02

Applicant: DALI SYSTEMS CO., LTD

Inventor： Shawn Patrick STAPLETON ,  Sasa TRAJKOVIC ,  Wolfgang WEBER

IPC: H04B10/2575 ,  H04W52/24 ,  H04W52/28 ,  H04B10/564

Abstract: A method for operating a Distributed Antenna System (DAS) includes providing a plurality of Digital Remote Units (DRUs), each configured to send and receive wireless radio signals and providing a plurality of inter-connected Digital Access Units (DAUs), each configured to communicate with at least one of the plurality of DRUs via optical signals and each being coupled to at least one sector of a base station. The method also includes providing a plurality of sensors operable to detect activity at each of the plurality of DRUs, turning off a DRU downlink signal at one of the plurality of DRUs in response to an output from one of the plurality of sensors, and turning on a DRU downlink signal at another of the plurality of DRUs in response to an output from another of the plurality of sensors.

公开(公告)号：US20220007094A1

公开(公告)日：2022-01-06

申请号：US17367092

申请日：2021-07-02

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick STAPLETON ,  Sasa TRAJKOVIC

IPC: H04Q11/00 ,  H04J14/02 ,  H04W40/02 ,  H04B10/27 ,  H04B10/2575

Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more local Digital Access Units (DAUs) located at a local location and one or more remote DAUs located at one or more remote locations. Each of the one or more local DAUs includes an optical port coupled to an upstream unit. The upstream unit includes at least one of a repeater, a baseband unit, a Base Transceiver Station (BTS), or a DAU. The one or more remote DAUs are coupled to the one or more local DAUs via one or more optical cables. A distance between the local location and each of the one or more remote locations is greater than two kilometers.

公开(公告)号：US20200296598A1

公开(公告)日：2020-09-17

申请号：US16891918

申请日：2020-06-03

Applicant: DALI SYSTEMS CO. LTD

Inventor： Sasa TRAJKOVIC ,  Shawn Patrick STAPLETON ,  Qianqi ZHUANG

IPC: H04W16/26 ,  H04B10/2575

Abstract: A system for networking Wi-Fi Access Points in a Distributed Antenna System includes a plurality of Digital Access Units (DAUs). The plurality of DAUs are coupled and operable to route signals between the plurality of DAUs. The system also includes a plurality of Digital Remote Units (DRUs) coupled to the plurality of DAUs and operable to transport signals between DRUs and DAUs and a plurality of DAU ports and DRU ports. The system further includes a Framer/Deframer, wherein the cellular payload data is separated from the IP data and a network switch. The IP data from a plurality of DAU and DRU ports are buffered and routed to a plurality of DAU and DRU ports. Furthermore, the system includes a plurality of Wi-Fi access points coupled via a mesh network to Wi-Fi access points connected to a plurality of DRUs.

公开(公告)号：US20200295833A1

公开(公告)日：2020-09-17

申请号：US16861561

申请日：2020-04-29

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Sasa TRAJKOVIC ,  Andrew LEUNG

IPC: H04B10/2575 ,  H04B17/382 ,  H04B17/24 ,  H04B17/00 ,  H04B17/30 ,  H04J14/02 ,  H04Q11/00 ,  H04W88/08

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.

公开(公告)号：US20220248498A1

公开(公告)日：2022-08-04

申请号：US17162772

申请日：2021-01-29

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Sasa TRAJKOVIC ,  Andrew LEUNG

IPC: H04W88/08 ,  H04B10/2575 ,  H04B7/022

Abstract: One exemplary aspect generally relates to public safety communication systems employing Distributed Antenna Systems (DAS) and/or a Digital Distribution System (DDS) as part of a distributed wireless network. More specifically, one aspect relates to a DAS/DDS architecture utilizing a software (re)configurable network. Even more specifically, one aspect relates to a DAS/DDS architecture having a redundant system topology as well as failover capabilities at one or more of the hardware/software level and/or the communication link level.

公开(公告)号：US20200244316A1

公开(公告)日：2020-07-30

申请号：US16849087

申请日：2020-04-15

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick STAPLETON ,  Sasa TRAJKOVIC

IPC: H04B7/022 ,  H04L12/701

Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more Base Band Units (BBUs). Each of the one or more BBUs has one or more digital outputs. The system also includes a plurality of Digital Multiplexer Units (DMUs) coupled to each other and operable to route signals between the plurality of DMUs. Each of the plurality of DMUs is operable to receive one or more digital inputs from the one or more BBUs. The system further includes a plurality of Digital Remote Units (DRUs) coupled to the plurality of DMUs and operable to transport signals between the plurality of DRUs and one or more of the plurality of DMUs.

公开(公告)号：US20200186250A1

公开(公告)日：2020-06-11

申请号：US16734833

申请日：2020-01-06

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick STAPLETON ,  Sasa TRAJKOVIC

IPC: H04B10/2575 ,  H04L25/02 ,  H04B7/022

Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more Base Band Units (BBUs). Each of the one or more BBUs has one or more digital outputs. The system also includes a plurality of Digital Multiplexer Units (DMUs) coupled to each other and operable to route signals between the plurality of DMUs. Each of the plurality of DMUs is operable to receive one or more digital inputs from the one or more BBUs. The system further includes a plurality of Digital Remote Units (DRUs) coupled to the plurality of DMUs and operable to transport signals between the plurality of DRUs and one or more of the plurality of DMUs.

公开(公告)号：US20200351578A1

公开(公告)日：2020-11-05

申请号：US16929406

申请日：2020-07-15

Applicant: DALI SYSTEMS CO. LTD.

Inventor： Shawn Patrick STAPLETON ,  Sasa TRAJKOVIC

IPC: H04Q11/00 ,  H04J14/02 ,  H04W40/02 ,  H04B10/27 ,  H04B10/2575

Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more local Digital Access Units (DAUs) located at a local location and one or more remote DAUs located at one or more remote locations. Each of the one or more local DAUs includes an optical port coupled to an upstream unit. The upstream unit includes at least one of a repeater, a baseband unit, a Base Transceiver Station (BTS), or a DAU. The one or more remote DAUs are coupled to the one or more local DAUs via one or more optical cables. A distance between the local location and each of the one or more remote locations is greater than two kilometers.