Wireless USB Host Beacon Control via Signal Capture
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Solution Overview
Problem
In wireless USB communication networks using UWB, directed beaconing devices (DBDs) often transmit beacons unnecessarily, leading to power wastage and prolonged beacon periods, as existing systems lack a mechanism to determine when DBDs should start beacon transmission based on the network's state.
Innovation Solution
A control device with a first instruction unit to instruct controlled devices to transmit signals, a reception unit to receive these signals, a decision unit to determine which devices should transmit beacons, and a second instruction unit to instruct beacon transmission, thereby reducing unnecessary beacon transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a DBD transmits beacons autonomously to enable other Wimedia devices to synchronize with the host, then synchronization reliability is improved, but power consumption increases and beacon periods are prolonged due to unnecessary transmissions
Solution Approach 1:
The host device determines whether another Wimedia device is present in the wireless communication network based on feedback information (captured signals) from the DBD, and then dynamically controls beacon transmission accordingly. This feedback mechanism allows the system to adapt beacon transmission to actual network conditions, avoiding unnecessary transmissions and reducing power consumption while maintaining synchronization reliability.
Solution Approach 2:
The DBD performs preliminary action by capturing signals from other devices and transmitting this captured signal information to the host before the host makes the beacon transmission decision. This preliminary information gathering enables the host to make an informed determination about whether another Wimedia device is present, allowing for optimized beacon transmission control.
2Adaptability or versatility
If multiple DBDs transmit beacons simultaneously to ensure coverage, then synchronization coverage is improved, but beacon period duration increases proportionally
Solution Approach 1:
The system dynamically adjusts beacon transmission based on real-time network conditions. The host determines whether another Wimedia device is present and instructs the DBD to transmit beacons only when necessary. This dynamic control allows the beacon transmission pattern to adapt to the actual number of devices requiring synchronization, optimizing the beacon period duration while maintaining adequate coverage.
3Measurement precision
If the host directly manages all device synchronization, then control precision is improved, but device complexity increases
Solution Approach 1:
The DBD acts as an intermediary between the host and other Wimedia devices in the network. It captures signals from devices outside the host's direct communication range and transmits this information to the host. This intermediary role allows the host to maintain precise control over beacon transmission decisions without directly managing all device-to-device communications, thereby reducing overall system complexity while preserving control precision.
Data Source
AI summary
This invention eliminates unnecessary beacon transmission by a DBD and suppresses the power consumption of each device included in a wireless communication network. This invention provides a communication control method in a host which wirelessly communicates with a DBD via a wireless USB. The method includes the steps of transmitting a capture packet command to a DBD when it is activated, analyzing a received captured signal and determining the presence/absence of another Wimedia device unrecognized by the host, and upon determining that the other Wimedia device unrecognized by the host exists, instructing the activated DBD to transmit a beacon to implement wireless communication synchronized with the host.