# US 7,610,015 B2 · System and method for coherent communication in a network

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- Number: US 7,610,015 B2
- Document ID: US7610015B2
- Status: Granted
- Kind: B2
- Application number: 10/955,717
- Filed: 2004-09-30
- Published: 2006-03-30
- Granted: 2009-10-27
- Earliest claimed: 2004-09-30
- Assignees: Alcatel-Lucent USA Inc.
- Inventors: Alex Pidwerbetsky
- Web page: https://patentgrep.com/patent/US7610015B2

## CPC

- H04Q 9/00: Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

A method is provided for increasing the effective transmission range for ones of a plurality of low-power transmitters arranged in an array. In particular, the low-power transmitters are arranged to simultaneously transmit a common information stream, and the transmitters are caused to transmit in a coherent manner. The resultant transmitted energy, as received at a receiver established to receive such transmissions, is thereby increased as a function of the number of operating transmitters.

## Claims

### Claim 1

A method for wireless transmission comprising the steps of
organizing payload data for ones of a plurality of transmitting units into a common payload for transmission by all of the plurality of transmitting units; and
causing the common payload data to be coherently transmitted by the plurality of transmitting units to a common receiving unit.

### Claim 2 (depends on 1)

The method of claim 1 wherein the step of causing coherent transmission of data comprises the substep of:
transmitting a channel characterization signal in conjunction with the payload data transmission from each of the plurality of transmitting units.

### Claim 3 (depends on 2)

The method of claim 2 wherein the channel characterization signal enables processing at a receiving unit to provide coherency of the signals from the plurality of transmitting units.

### Claim 4 (depends on 1)

The method of claim 1 wherein the step of causing coherent transmission of data comprises the substep of:
receiving a reference signal at ones of the plurality of transmitting units whereby ones of the plurality of transmitting units transmit the common payload data in coordination with the reference signal.

### Claim 5 (depends on 4)

The method of claim 4 wherein the reference signal is provided from a receiver adapted to receive signals transmitted by the plurality of transmitting units.

### Claim 6 (depends on 1)

The method of claim 1 wherein the step of causing coherent transmission of data includes the further step of operating the plurality of transmitting units in synchronism.

### Claim 7 (depends on 1)

The method of claim 1 wherein the plurality of transmitting units comprise sensor units of a sensor array.

### Claim 8

A method for managing a plurality of wireless transmission units disposed proximate one another comprising the steps of:
upon the availability of payload data for transmission for at least one of the plurality of wireless transmission units, signaling others of the wireless transmission units to schedule a common transmission event;
sending payload data available for transmission from ones of the wireless transmission units having such data to all of the other wireless transmission units;
consolidating data from the units having data into a single payload at all of the wireless transmission units; and
coherently transmitting the single payload from all of the wireless transmission units to a common receiving unit.

### Claim 9 (depends on 8)

The method of claim 8 wherein the step of coherently transmitting the single payload comprises the sub step of:
transmitting a channel characterization signal in conjunction with the payload data transmission from each of the wireless transmission units.

### Claim 10 (depends on 9)

The method of claim 9 wherein the channel characterization signal enables processing at a receiving unit to provide coherency of the signals from the wireless transmission units.

### Claim 11 (depends on 8)

The method of claim 8 wherein the step of coherently transmitting the single payload comprises the sub step of:
receiving a reference signal at ones of the wireless transmission units whereby ones of the wireless transmission units transmit the payload data in coordination with the reference signal.

### Claim 12 (depends on 11)

The method of claim 11 wherein the reference signal is provided from a receiver adapted to receive signals transmitted by the wireless transmission units.

### Claim 13 (depends on 8)

The method of claim 8 wherein the step of coherently transmitting the single payload includes the further step of operating the plurality of wireless transmission units in synchronism.

### Claim 14 (depends on 8)

The method of claim 8 wherein the plurality of wireless transmission units comprise sensor units of a sensor array.