# US 11,309,943 B2 · System and methods for planned evolution and obsolescence of multiuser spectrum

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- Number: US 11,309,943 B2
- Document ID: US11309943B2
- Status: Granted
- Kind: B2
- Application number: 17/379,985
- Filed: 2021-07-19
- Published: 2021-11-11
- Granted: 2022-04-19
- Earliest claimed: 2004-04-02
- Assignees: Rearden, LLC
- Applicants: Rearden, LLC
- Inventors: Stephen G. Perlman; Antonio Forenza
- Web page: https://patentgrep.com/patent/US11309943B2

## CPC

- H04B 7/0434: {using multiple eigenmodes}
- 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
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04L 1/0003: {by switching between different modulation schemes}
- H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
- H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 25/03343: {Arrangements at the transmitter end}
- H04L 25/03891: {Spatial equalizers (MIMO diversity systems H04B7/0413)}
- H04W 16/18: Network planning tools
- H04W 52/225: {Calculation of statistics, e.g. average or variance}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/42: in systems with time, space, frequency or polarisation diversity
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A system and method are described which enable planned evolution and obsolescence of multiuser wireless spectrum. One embodiment of such a system includes one or multiple centralized processors and one or multiple distributed nodes that communicate via wireline or wireless connections. The distributed nodes may share their identification number and other reconfigurable system parameters with the centralized processor. The information about all distributed nodes may be stored in a database that is shared by all centralized processors. The reconfigurable system parameters may comprise power emission, frequency band, modulation/coding scheme. The distributed nodes may be software defined radios such as FPGA, DSP, GPU and/or GPCPU that run algorithms for baseband signal processing and may be reconfigured remotely by the centralized processor. A cloud wireless system may be used wherein the distributed nodes are reconfigured periodically or instantly to adjust to the evolving wireless architecture.

## Claims

### Claim 1

A system comprising:
a plurality of distributed wireless transceiver nodes (DNs) configured to create 3GPP protocol wireless links with a plurality of user equipment devices (UEs) of which at least one can tolerate up to a first maximum send/receive latency in establishing and maintaining the wireless links to a DN;
a centralized processor (CP) communicatively coupled to the DNs through a wireline or wireless base station network (BSN);
the BSN having a send/receive latency greater than the first maximum send/receive latency;
the CP communicating baseband waveforms through the BSN to the DNs which modulate the baseband waveforms onto wireless carriers received by the UEs that satisfy the first maximum send/receive latency, and
wherein at least one DN is configured to synchronize to transmissions from other wireless transceivers.

### Claim 2

A method to use remote baseband processing for local wireless networks comprising:
distributing a plurality of distributed wireless transceiver nodes (DNs);
communicatively coupling the DNs over a wireless link to a plurality of user equipment devices (UEs) that can tolerate up to a first maximum send/receive latency in establishing and maintaining wireless communications to a DN;
communicatively coupling the centralized processor (CP) to the DNs through a wireline or wireless base station network (BSN), the BSN having a send/receive latency greater than the first maximum send/receive latency;
the CP communicating baseband waveforms through the BSN to the DNs which modulate the baseband waveforms onto wireless carriers received by the UEs that satisfy the first maximum send/receive latency, and
wherein at least one DN is configured to synchronize to transmissions from other wireless transceivers.