Ad-hoc Wireless Beacon Synchronization via Pre-receive State
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In ad-hoc wireless communication networks, devices face challenges in accurately transitioning from a sleep state to an active state due to the absence of a control station, leading to difficulties in synchronization, beacon signal positioning, and low power consumption operations.
Innovation Solution
The introduction of a pre-receive state within the superframe period allows wireless communication apparatuses to receive beacon signals from adjacent devices, enabling accurate synchronization and activation timing, as well as the addition of information about low power consumption modes to prevent beacon signal collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication apparatuses operate in ad-hoc network without control station, then network simplicity and ease of operation are improved, but synchronization accuracy and beacon signal positioning deteriorate
Solution Approach 1:
Each wireless communication apparatus autonomously determines its own beacon transmission timing by receiving beacon signals from adjacent apparatuses and calculating time differences, eliminating the need for a control station while maintaining synchronization accuracy
Solution Approach 2:
Apparatuses continuously receive beacon signals from neighbors and adjust their own transmission timing based on measured time differences, creating a feedback mechanism that maintains synchronization without centralized control
2Loss of energy
If wireless communication apparatus transitions directly from sleep state to active state, then power consumption is reduced, but synchronization and beacon signal positioning become inaccurate
Solution Approach 1:
Before transitioning to full active state, the apparatus performs a preliminary action by receiving beacon signals from adjacent apparatuses during a transition period, allowing it to calculate and adjust its beacon transmission timing in advance to ensure accuracy upon full activation
3Speed
If beacon signal transmission timing is determined without receiving adjacent beacon signals, then transition speed to active state is improved, but beacon signal positioning accuracy deteriorates
Solution Approach 1:
The apparatus performs preliminary beacon signal reception during the transition period before full active operation begins, calculating timing adjustments in advance so that when fully active, the beacon transmission positioning is already accurate without requiring continuous signal processing
Data Source
AI summary
A wireless communication system includes plural wireless communication apparatuses which form an ad-hoc network. In the system, an operating state of each superframe of each wireless communication apparatus is determined from three operating states: an active state in which beacon signal transmission/reception and data transmission/reception are performed as necessary; a sleep state in which beacon signal transmission/reception and data transmission/reception are not performed; and a pre-receive state in which a beacon signal is received and afterward beacon signal transmission and data transmission are not performed.