Five reasons to promote OCC

The light spectrum is a rescue solution for the exponential growth of wireless connectivity demand. The bandwidth of light is 1000 times larger than the entire RF bandwidth. Among light communication technologies, Optical Camera Communication (OCC) is an entirely software-based solution, which is the best compatible with existing infrastructures such as commercial cameras and lighting. …

Update OpenSource List

The OpticalPress Team is happy to provide Open Source Codes based on IEEE 802.15.7-2018 Optical Wireless Communication (OWC) standard, the most recent international standard that includes Optical Camera Communication (OCC) technologies. We believe that the codes are beneficial for the implementation of your novel ideas as well as practical comparison purposes. We were lucky and …

Needs for OCC: Line code, Scrambler, Interleaving, and CRC

This post discusses several aspects of light communication as follows Line Coding: What and Why Line Coding is needed? Other choices? Scrambler: What is a Scrambler? OCC needs this? Interleaving: Purpose and Generation. Cyclic Redundancy Check: Where it is applied.   Run-length limited code for Visible Light Communication According to Wikipedia, for reliable clock recovery …

Customizing MAC for OCC Modes

This post discusses the topic related to OCC MAC and MPDU.   IEEE 802.15.7m OCC MAC Layer "Use of over-the-air MAC frame configuration is forbidden for PHY types IV, V and VI. It is mandatory MAC frame configuration be done via the MAC PIB. This is due to the fact that unlike traditional wireless LAN/PAN, the data …

Software-defined Configuration method for OCC Systems

The purpose of the post is to specify the PIB attributes for configuring a particular OCC PHY mode. Any OCC PHY mode is co-existing with the others and recognizable by a specific receiver once the PIBs are specified. The configuration of PHY-PIB attributes is software-defined (App-based). Without using PHY-frame overhead, the App-based configuration is communication …

PPDU: PHY frame format for S2-PSK & HS-PSK

This post reviews the design of the Physical-layer Packet Data Unit (PPDU) for S2-PSK and HS-PSK operating modes within PHY IV of IEEE 802.15.7m. The general structure of PPDU for all OCC Operating modes is illustrated in Figure 1. SHR: Synchronization Header PHR: Physical-Layer Header HCS: Header Check Sequence PSDU: PHY service data unit "Use of over-the-air PHY …

HS-PSK: High-rate transfer over RoI(s)

HS-PSK is an operating mode being standardized at IEEE 802.15.7m. This post describes what it is for and how it operates. Figure 1 illustrates an example in which an Rx can select the link properly for an intended usage. The link setup procedure is solved by the RoI-Signaling waveform, while this high-rate waveform is additionally …

S2-PSK: A choice for RoI-Signaling

S2-PSK is an operating mode being standardized at IEEE 802.15.7m. This post describes what it is for and how it operates.   Technical Considerations for a RoI-signaling Waveform Even though RoI-signaling mode has a very low data rate, it is indispensable to the OCC system operating in a challenging condition such as V2X. The general …

What is Optical Region-of-Interest Signaling?

In the context of a safety assistance communication-based solution, OWC is a strong candidate for delivering the V2V communication power to cars. It is realized that the LED lighting is quipped to car mandatorily, meanwhile, a camera is considered as one of the indispensable sensors for car vision. The existence of supportive infrastructure enables the …

PHY modes within IEEE 802.15.7m draft – a quick review

PHY operating modes  The latest IEEE 802.15.7m draft standard (until Aug. 2018) is on the Sponsor Balloting recirculation. This version has updated a lot in compared to the previous version before LiFi modes are moved to new task group under IEEE 802.15. A list of operating modes between two drafts is a good start. Notation …