The present invention discloses a visible light signal transmitting and receiving processing method, a transmitting terminal, a receiving terminal, and a system. The method includes: performing, by a transmitting terminal, an operation between data to be sent and a pseudocode signal of the transmitting terminal to output a scrambled code signal; combining, by the transmitting terminal, the scrambled code signal with a light guide signal to obtain a signal to be sent, where the light guide signal includes identity information of the transmitting terminal; and transmitting, by the transmitting terminal, the signal to be sent in light form. The present invention solves a problem that an encryption method for visible light communication in a related art is applicable to only one transmitting terminal, and thereby multiple transmitting terminals can be supported.

The present invention discloses a visible light signal transmitting and receiving processing method, a transmitting terminal, a receiving terminal, and a system. The method includes: performing, by a transmitting terminal, an operation between data to be sent and a pseudocode signal of the transmitting terminal to output a scrambled code signal; combining, by the transmitting terminal, the scrambled code signal with a light guide signal to obtain a signal to be sent, where the light guide signal includes identity information of the transmitting terminal; and transmitting, by the transmitting terminal, the signal to be sent in light form. The present invention solves a problem that an encryption method for visible light communication in a related art is applicable to only one transmitting terminal, and thereby multiple transmitting terminals can be supported.

A data carrier 2 is provided with a comparator 41, a capacitor 42, a comparator operation adjustment resistor 43, a resistance voltage divider circuit 44 and a reactive-current resistor 45. The capacitor 42 is disposed between the cathode of a photo-diode (PD) 21 and the minus input terminal of the comparator 41. The comparator operation adjustment resistor 43 is disposed between the plus terminal of a primary battery 271 and the minus input terminal of the comparator 41. The resistance voltage divider circuit 44 is constituted by a series connection of voltage dividing resistors 441 and 442. One end of the resistance voltage divider circuit 44 is connected to the plus terminal of the primary battery 271. The junction between the voltage division resistor 441 and the other voltage division resistor 442 is connected to the plus input terminal of the comparator 41.

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit.

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit.

Various of the disclosed embodiments relate to line-of-sight (LOS), e.g., optical, based networks. Particularly, systems and methods are provided for aligning nodes in a line-of-sight communication network with their peers. The nodes may be placed and passively aligned with one another as position information is passed between peers. The elevation indicated in the position information may be refined based upon relative barometric pressure readings between peers. In a next phase, isolated networks of nodes may be integrated with the network of nodes contacting the Internet backbone. Finally, routing algorithms may be implemented to address weather effects (e.g., fog) and congestion to optimize network service.

An imaging transmitter (Tx) for free-space optical communications (FOC) includes a light source for providing modulated light, a pixel controller configured for dynamic selection of at least a portion of the modulated light to provide at least one pre-collimated FOC beam. An imaging lens assembly is for collimating the pre-collimated FOC beam to provide a transmitted FOC beam. The pixel controller controls a location of the pre-collimated FOC beam with respect to a focal surface of the imaging lens assembly so that the transmitted FOC beam is projected into a desired direction in object space that is determined by the location, or in the case that the light source is an emitting array, equivalently the transmitted FOC beam is projected into a unique angular volume described by the center line-of-sight (LOS) and instantaneous FOV (iFOV) of the emitting pixel(s) in the array.

A laser relay module in a free space optical communication network includes: a beacon source for generating an optical beacon signal for aligning a communication channel of a source optical node to a communication channel of a receiving optical node; a beacon inserter for encoding the optical beacon signal with switching information; a telescope for transmitting the encoded optical beacon signal to the receiving optical node; a beacon detector for detecting received switching information from the modulated optical beacon signal, wherein the receiving optical node uses the encoded optical beacon signal to align communication channel of the receiving optical node with communication channel of the source optical node; and a processor for using the detected switching information to change configuration of an optical switch matrix to direct received data to a next optical node in the free space optical communication network.

A laser relay module in a free space optical communication network includes: a beacon source for generating an optical beacon signal for aligning a communication channel of a source optical node to a communication channel of a receiving optical node; a beacon inserter for encoding the optical beacon signal with switching information; a telescope for transmitting the encoded optical beacon signal to the receiving optical node; a beacon detector for detecting received switching information from the modulated optical beacon signal, wherein the receiving optical node uses the encoded optical beacon signal to align communication channel of the receiving optical node with communication channel of the source optical node; and a processor for using the detected switching information to change configuration of an optical switch matrix to direct received data to a next optical node in the free space optical communication network.

An apparatus and a method are provided for an optical wireless communication (OWC) laser light communications device. The laser light communications device comprises one or more pairs of transmitting and receiving cells. The transmitting and receiving cells may be used in a variety of arrangements and configurations, and scaled appropriately for given data transmission needs. A laser light signal, comprising a communication layer and a high-energy protection layer, is sent from transmitting cells to receiving cells. The high-energy protection layer physically envelopers the communication layer. The protection layer provides for enhanced security and encryption, and ensures signal integrity when received and ultimately decoded and interpreted. The receiving cells may be configured to utilize the energy of the high-energy protection layer, such as by using the energy to charge a battery, or to provide energy for a subsequent transmission.