Visible Light Communication Access via Neighbor VPAN Probe Data
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Solution Overview
Problem
Existing visible light communication (VLC) technologies face long access times due to interference between beacon frames from multiple personal area networks (VPANs), leading to prolonged device search and access times, which negatively impact user experience.
Innovation Solution
The method involves a coordinator obtaining and sending neighbor VPAN information to user equipment, including probe information about beacon slots, logical channels, and modulation frequencies, as well as access availability and load, allowing devices to selectively search and access VPANs without scanning all options, thereby reducing access time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all VPANs send beacon frames using different beacon slots, logical channels, or modulation frequencies to resolve interference, then interference between beacon frames is reduced, but the device needs to consume extremely long time to perform search across multiple slots, channels, or frequencies
Solution Approach 1:
The coordinator performs preliminary actions by obtaining neighbor VPAN information in advance and proactively sending it to the device. This allows the device to immediately access pre-acquired beacon frame information without needing to perform lengthy searches across multiple beacon slots, logical channels, or modulation frequencies, thus resolving the time loss caused by interference resolution mechanisms
Solution Approach 2:
The coordinator acts as an intermediary between neighbor VPANs and the device. It collects beacon frame information from multiple VPANs and relays it to the device, eliminating the need for the device to directly search multiple channels and frequencies. This intermediary approach maintains interference resolution while dramatically reducing search time
2Reliability
If a device performs complete VPAN search by scanning all beacon slots, logical channels, and modulation frequencies, then comprehensive VPAN discovery is achieved, but access time becomes extremely long affecting user experience
Solution Approach 1:
The essential beacon frame information from multiple VPANs is extracted and sent to the device through the coordinator. This extraction approach provides comprehensive VPAN discovery information without requiring the device to perform complete scans across all beacon slots, logical channels, and modulation frequencies, thus maintaining reliability while reducing access time
Solution Approach 2:
The coordinator performs preliminary information gathering from neighbor VPANs and makes it available to the device before the device needs to access a VPAN. This preliminary action ensures comprehensive VPAN discovery information is already available, eliminating the need for time-consuming complete searches
Data Source
AI summary
The present application relates to the field of communications technologies, and discloses an access method, apparatus, device, and system for visible light communication. The method includes: obtaining neighbor visible light communication personal area network VPAN information, where the neighbor VPAN information includes information about at least one neighbor VPAN of a first VPAN, and information about each neighbor VPAN includes an identity ID and probe information of the neighbor VPAN; sending the neighbor VPAN information to user equipment, where the neighbor VPAN information is used by the user equipment to perform VPAN search and access. In embodiments of the present application, a VPAN sends obtained neighbor VPAN information to user equipment, so that the user equipment can perform VPAN search and access based on probe information of a neighbor VPAN in the neighbor VPAN information.