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Interference-free scheduling for wireless optical networks with multiple coordinators

An optical network and wireless technology, applied in the direction of electromagnetic network arrangement, short-distance systems, electrical components, etc., can solve problems such as inability to directly measure interference

Pending Publication Date: 2021-06-22
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a coordinator may not be able to directly measure any significant interference caused by neighboring coordinators

Method used

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  • Interference-free scheduling for wireless optical networks with multiple coordinators
  • Interference-free scheduling for wireless optical networks with multiple coordinators
  • Interference-free scheduling for wireless optical networks with multiple coordinators

Examples

Experimental program
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Embodiment Construction

[0052] Embodiments of the present invention are now described based on a LiFi network environment with coordinators with overlapping coverage areas.

[0053] The following embodiments are directed to the allocation of reserved time channels or reserved time slots.

[0054] figure 1 A schematic network architecture with communication facilities for interference handling based on a coordinated topology is shown. A local coordinator (CL) 20 and at least one neighbor coordinator (CN) 22 are adapted via an optical link L O transmit their announcement A to at least one associated terminal device 30 L 、A N And a report R is received from at least one associated terminal device 30 . In addition, the coordinators 20 , 22 are connected via a fixed wired backbone network 100 to which the global controller (GCTL) 10 is also optionally connected. Because the optical link L between the coordinator 20, 22 and the associated end device O This can be achieved with a certain directionalit...

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PUM

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Abstract

In a wireless optical network with multiple coordinators or other access points, the coverage area of coordinators may overlap. Interference in the communication between coordinators and devices may occur in these overlapping coverage areas. Various embodiments propose an automatic allocation of reserved time slots to coordinators. These time slots support the coordinators to advertise their presence without interference and enable a device to detect the presence of a neighbour coordinator in a single MAC cycle. Cooperation of coordinators can be supervised by a global controller to determine non-interfering time schedules whereby the coordinators rely on interference reports from the devices in the overlapping coverage areas. Fast detection allows fast re-scheduling of time slots in the wireless optical network in order to prevent interference when a device that enters the overlapping coverage area of two coordinators.

Description

technical field [0001] The present invention relates to the field of scheduling transmissions in optical wireless networks, such as but not limited to LiFi networks, for a variety of different applications in the home, office, retail, hospitality and industry. Background technique [0002] Wireless optical networks, such as LiFi networks (named similar to Wi-Fi networks), enable electronic devices such as laptops, tablets, and smartphones to connect wirelessly to the Internet. Wi-Fi achieves this using radio frequencies, while LiFi achieves this using light spectrum, which enables unprecedented data and bandwidth. It’s important to consider that wireless data isn’t just needed for our traditional connected devices – today, TVs, speakers, headphones, printers, virtual reality (VR) goggles and even refrigerators use wireless data to connect and perform essential tasks. communication. Radio frequency technologies like Wi-Fi have run out of spectrum to support this digital rev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/114H04B10/116
CPCH04B10/1149H04B10/116H04B10/27
Inventor A·范瓦格宁根
Owner SIGNIFY HLDG BV