Wireless Transmission Apparatus Movement Detection
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Solution Overview
Problem
Conventional information communication systems using wireless communication in the 60-GHz band face disruptions due to high directivity, causing connection loss when the positional relationship between transmission and receiving apparatuses changes, leading to unintended power-off or reconnection requirements when the user moves the camera during operation.
Innovation Solution
A transmission apparatus that employs both high-directional and low-directional wireless communication modes to detect movement and control the suspension of no-signal condition avoidance processes, ensuring seamless reconnection by distinguishing between movement-induced disconnections and other causes of signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-directional wireless communication mode is used to achieve high-speed data transmission, then communication speed is improved, but connection stability deteriorates when the positional relationship between transmission and receiving apparatuses changes
Solution Approach 1:
The system dynamically switches between high-directional mode (for high-speed transmission when stable) and low-directional mode (for maintenance during movement). The transmission apparatus detects movement and automatically switches to low-directional mode to maintain connection, then switches back to high-directional mode when stable, achieving adaptive optimization of both speed and reliability.
Solution Approach 2:
The system changes the directional characteristic parameter of the wireless communication mode based on operational conditions. When movement is detected, the system transitions from high-directional to low-directional mode, altering the beam width and coverage parameters to maintain connection stability while preserving the ability to achieve high speeds when needed.
2Use of energy by stationary object
If the receiving apparatus executes no-signal condition avoidance process to prevent power-off, then power consumption is reduced, but unnecessary power-off occurs when disconnection is caused by user movement
Solution Approach 1:
The transmission apparatus provides feedback information about its operational state (including movement detection) to the receiving apparatus. This feedback mechanism allows the receiving apparatus to distinguish between voluntary disconnection (user movement) and actual signal loss, preventing unnecessary power-off while maintaining power saving benefits.
Solution Approach 2:
The system performs preliminary detection of movement conditions before executing the no-signal condition avoidance process. By detecting movement in advance and communicating this state information to the receiving apparatus, the system prevents premature or unnecessary power-off actions while still maintaining power consumption reduction benefits.
3Reliability
If the transmission apparatus switches to low-directional mode to maintain connection during movement, then connection stability is improved, but communication speed deteriorates
Solution Approach 1:
The system dynamically adapts the communication mode based on real-time conditions. During movement, it uses low-directional mode for stable maintenance communication. When movement stops and stability is achieved, it switches back to high-directional mode for high-speed transmission. This dynamic switching resolves the contradiction by applying the appropriate mode to the appropriate situation.
Solution Approach 2:
The system periodically evaluates the operational state and switches between high-directional and low-directional modes based on detected movement conditions. This periodic assessment ensures that the system maintains connection stability when needed while preserving high-speed capability when conditions permit, accepting temporary speed reduction during movement as a trade-off for connection maintenance.
Data Source
AI summary
When a communication between a camera and a television is performed utilizing a first wireless communication mode which employs high-directional radio transmission, and a second wireless communication mode which employs low-directional radio transmission with lower directivity than that of high-directional radio transmission, the television detects that the communication in the first wireless communication mode has been disconnected and notifies the camera. The camera determines whether or not the movement of the camera is the cause of disconnection in the first wireless communication mode. If the reason for disconnection is the movement of the camera, a control signal is transmitted to the television so as not to execute the process for an avoiding no-signal condition.