AoA Periodic Advertising Synchronization to Prevent Wireless Collisions
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining time synchronization among wireless communication devices, particularly in AoA-based location determination using periodic advertisements with constant tone extensions (PA CTEs), leading to potential collisions and conflicts on shared wireless mediums.
Innovation Solution
Implementing a system that establishes and maintains time synchronization among wireless communication devices by using synchronization information from a network entity to determine a common starting time and individual offsets for PA CTE trains, avoiding collisions and ensuring synchronized PA CTE transmissions across multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple wireless communication devices transmit periodic advertisements simultaneously on a shared wireless medium, then the quantity of transmitted information increases, but collisions and conflicts occur leading to reduced reliability
Solution Approach 1:
The patent applies preliminary action by establishing time synchronization among wireless communication devices before they transmit periodic advertisements. A synchronizing device determines a common starting time and communicates it to multiple transmitting devices, which then adjust their transmission timing based on individual offsets. This pre-synchronization prevents collisions before they occur, ensuring reliable communication while allowing multiple devices to transmit simultaneously.
2Device complexity
If wireless communication devices use independent timing for periodic advertisements, then device complexity is reduced, but time synchronization accuracy deteriorates leading to collisions
Solution Approach 1:
The patent introduces an intermediary synchronizing device that mediates timing between multiple wireless communication devices. This central synchronizing entity determines the common starting time and calculates individual offsets for each transmitting device, eliminating the need for complex distributed timing coordination while ensuring precise time synchronization. The intermediary handles the computational complexity centrally, keeping individual device complexity low while maintaining high synchronization accuracy.
3Ease of operation
If wireless communication devices transmit periodic advertisements at arbitrary times, then ease of operation is improved, but angle of arrival measurement precision deteriorates due to lack of synchronization
Solution Approach 1:
The patent applies parameter changes by modifying the time parameter of periodic advertisement transmissions. Instead of allowing arbitrary transmission times, the system establishes a common starting time parameter that all devices synchronize to, with each device applying a specific offset parameter. This controlled parameter adjustment maintains ease of operation while ensuring precise angle of arrival measurements through synchronized transmissions.
Data Source
AI summary
Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a process can include receiving, from a network entity, synchronization information associated with a first set of periodic advertisements (PAs). A first time offset from a reference time can be determined based on the synchronization information, wherein the reference time is associated with synchronization of a plurality of wireless communication devices including the wireless communication device. A second set of PAs can be transmitted at a synchronized time based on the reference time and the first time offset, each PA of the second set of PAs including a constant tone extension (CTE).