# US 11,452,176 B1 · Smart distributed antenna systems, platforms, and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,176 B1 - Document ID: US11452176B1 - Status: Granted - Kind: B1 - Application number: 17/504,309 - Filed: 2021-10-18 - Granted: 2022-09-20 - Earliest claimed: 2021-10-18 - Assignees: Tecore, Inc. - Applicants: Tecore, Inc. - Inventors: Jay Salkini - Web page: https://patentgrep.com/patent/US11452176B1 ## CPC - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 88/085: {Access point devices with remote components} - H04B 7/022: Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A platform hosting a smart distributed antenna system (sDAS) includes a multi-radio access technology (multi-RAT) digital unit (DU) (mDU). The mDU includes a radio management unit (RMU) configured as a software multiplexer enabling broadcast of multiple technologies from a single radio and a single mDU, a field programmable gate array (FPGA) coupled to the RMU and receiving signals digitized in the mDU from analog signals from a wireless carrier, and the FPGA maps received and digitized signals to frequency bands. An optical fiber interface is coupled to the FPGA, in which mapped digital signals are provided to more remote radio units over an optical fiber cable. The radio units are coupled to the mDU through only a single optical fiber interface using a daisy-chain configuration. Each radio unit de-maps received digital signals to a specified frequency, converts de-mapped digital signals to radio frequency signals, and provides the signals to a distributed antenna for broadcast. ## Claims ### Claim 1 A hardware platform hosting a smart distributed antenna system (sDAS), the platform, comprising: a multi-band, multi-radio access technology (multi-RAT) digital unit (mDU), the mDU comprising: a radio management unit (RMU) comprising a software multiplexer, the software multiplexer software enabling broadcast of multiple technologies from a single radio and a single mDU, a field programmable gate array (FPGA) coupled to the RMU and receiving signals digitized in the mDU from analog signals originating from a wireless carrier, wherein the FPGA executes to map received and digitized signals to one of a plurality of frequency bands, and only a single optical fiber interface coupled to the FPGA, wherein banded received digital signals are provided to one or more remote radio unit over an optical fiber cable; and one or more remote multi-band, multi-RAT radio units (mRU) coupled to the mDU through the single optical fiber interface using a daisy-chain configuration, each of the one or more mRUs comprising: a local FPGA, wherein the local FPGA de-maps the banded received digital signals to a specified frequency, a digital to analog converter that converts de-mapped digital signals to radio frequency signals, and a transmit section that provides the radio frequency signals to a distributed antenna for broadcast to a defined volume. ### Claim 2 (depends on 1) The hardware platform of claim 1, wherein the multi-RAT comprises one of 2G, 3G, 4G LTE, and 5G technologies. ### Claim 3 (depends on 1) The hardware platform of claim 1, further comprising a multi-point of interface (mPOI) configured to receive the analog signal from existing Base Transceiver Stations (BTS), wherein received analog signals are converted to digital signals in the mDU. ### Claim 4 (depends on 1) The hardware platform of claim 1, wherein the platform comprises multiple mDUs, a low-band mDU and a mid-band mDU, wherein signal processing in a specific mDU is determined by the frequency of received signals. ### Claim 5 (depends on 4) The hardware platform of claim 4, wherein the low-band mDU process signals in 600, 700, and 800 MHz bands and the mid-band mDU processes signals in 1900 MHz, Advanced Wireless Service (AWS), Wireless Communications Service (WCS), and 2500 MHz bands. ### Claim 6 (depends on 1) The hardware platform of claim 1, wherein a mRU receives a RF signal through a distributed antenna from a wireless device, wherein the mRU converts the RF signal to a digital signal, maps the digital signal to a frequency band, and transports the mapped digital signal to the mDU. ### Claim 7 (depends on 6) The hardware platform of claim 6, wherein mDU de-maps the digital signal transported from the mDU, converts the de-mapped digital signal to an analog signal, and transports the analog signal to the wireless carrier. ### Claim 8 (depends on 1) The hardware platform of claim 1, wherein the single optical fiber interface is compliant with one or more of common public radio interface, enhanced common public radio interface, and open radio access network standards. ### Claim 9 A smart distributed antenna system (sDAS), comprising: a multi-band, multi-radio access technology (multi-RAT) digital unit (mDU), the mDU comprising: a radio management unit (RMU) comprising a software multiplexer, the software multiplexer software enabling broadcast of multiple technologies from a single radio and a single mDU, a field programmable gate array (FPGA) coupled to the RMU and receiving signals digitized in the mDU from analog signals originating from a wireless carrier, wherein the FPGA executes to map received and digitized signals to one of a plurality of frequency bands, and only a single optical fiber interface coupled to the FPGA, wherein mapped received digital signals are provided to one or more remote radio units over an optical fiber cable; a multi-point of interface (mPOI) coupled to the mDU and coupled to one or more base transceiver station equipment (BTS) installations, the mPOI receiving analog radiofrequency signals from the coupled BTS installations; and one or more multi-band, remote multi-RAT radio units (mRUs) coupled to the mDU through the single optical fiber interface using a daisy-chain configuration, each of the one or more mRUs comprising: a local FPGA, wherein the local FPGA de-maps the mapped received digital signals to a specified frequency, a digital to analog converter that converts de-mapped digital signals to radio frequency (RF) signals, and a transmit section that provides the RF signals to a distributed antenna for broadcast to a defined volume. ### Claim 10 (depends on 9) The sDAS of claim 9, wherein a first RF signal is received at a point of interface from a legacy Base Transceiver Station (BTS); and the first RF signal is processed to generate a digital representation. ### Claim 11 (depends on 9) The sDAS of claim 9, wherein a multi-RAT technology comprises one of 2G, 3G, 4G LTE, and 5G technologies. ### Claim 12 (depends on 9) The sDAS of claim 9, wherein the sDAS comprises multiple mDUs, a low-band mDU and a mid-band mDU, wherein signal processing in a specific mDU is determined by frequencies of the analog signals. ### Claim 13 (depends on 9) The sDAS of claim 9, wherein a mRU receives a RF signal through a distributed antenna from a wireless device, wherein the mRU converts the RF signal to a digital signal, maps the digital signal to a frequency band, and transports the mapped digital signal to the mDU. ### Claim 14 (depends on 13) The sDAS of claim 13, wherein the mRU de-maps the digital signal transported from the mDU, converts the de-mapped digital signal to an analog signal, and transports the analog signal to the Base Transceiver Station of the wireless carrier. ### Claim 15 (depends on 9) The sDAS of claim 9, wherein the single optical fiber interface is compliant with one or more of common public radio interface, enhanced common public radio interface, and open radio access network standards. ### Claim 16 A method for operating a smart distributed antenna system (sDAS), comprising: receiving by a processor of a multi band, multi radio access technology digital unit (mDU), a digital representation of a first radio frequency (RF) signal having a specific frequency; receiving, from the mDU, the digital representation at a radio management unit (RMU) coupled to the mDU and comprising a field programmable gate array (FPGA) comprising a software multiplexer, the software multiplexer enabling broadcast of multiple technologies from a single radio and the mDU; the FPGA mapping the digital representation to a specified frequency band based on the specific frequency of the first RF signal, thereby creating a mapped digital signal; transporting the mapped digital signal to a plurality of remote radio units, wherein multiple remote radio units are daisy-chained to the mDU using only a single fiber optic interface; de-mapping the mapped digital signal in one or more of the multi band, multi radio access technology remote radio units; converting the de-mapped digital signal to a second RF signal; and transporting the second RF signal to one or more distributed antennas for broadcast. ### Claim 17 (depends on 16) The method of claim 16, wherein the first RF signal is received at a point of interface from a legacy Base Transceiver Station (BTS); and processing the first RF signal to generate the digital representations. ### Claim 18 (depends on 17) The method of claim 17 wherein the multi radio access technology comprises one or more of 2G, 3G, 4G LTE, and 5G technologies. ### Claim 19 (depends on 18) The method of claim 18 wherein signal processing is executed under control of a field programmable gate array instantiated on the mDU. ### Claim 20 (depends on 16) The method of claim 16, wherein the received RF signal is processed in one of a low-band mDU and a mid-band mDU. ### Claim 21 (depends on 20) The method of claim 20, wherein the low-band mDU and the mid-band mDU each comprise a digital multiplexer, wherein the digital multiplexer executes to perform the mapping. ### Claim 22 (depends on 16) The method of claim 16, comprising providing a single, shared sDAS point of management user interface for all carriers coupled to the sDAS.