Digital Camera Wireless Connection Control via Preliminary Service Initiation
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Solution Overview
Problem
Digital cameras with limited resources can only connect to one information processing device via wireless networks, limiting their ability to establish connections with multiple devices, and existing methods do not allow for seamless device selection by the camera.
Innovation Solution
A communication device and method that allows a digital camera to transmit service activation data to multiple devices without identifiers, sending negative responses to connection requests from all but the desired device, ensuring connection only with the specified device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a digital camera connects to multiple information processing devices via wireless network, then the camera can communicate with more devices, but it cannot uniquely specify which device to connect to
Solution Approach 1:
The camera performs preliminary actions by transmitting service initiation packets to all detected devices before actual connection establishment. This allows the camera to proactively engage multiple devices and receive their responses, then selectively accept connections based on predetermined criteria (such as device priority or user selection), thereby resolving the contradiction between connecting to multiple devices and specifying the correct one.
2Speed
If a digital camera establishes connection with the first information processing device to transmit connection request, then connection is established quickly, but the camera may not connect to the desired device
Solution Approach 1:
The camera transmits service initiation packets to all potential devices in advance, receiving their responses before establishing actual connections. This preliminary engagement allows the camera to identify the desired device among multiple respondents and establish connection with it, rather than merely connecting to the first responder. This maintains speed by parallel processing while improving reliability through selective acceptance.
Solution Approach 2:
The system implements feedback mechanisms where the camera receives device information packets from multiple information processing devices in response to service initiation packets. Based on this feedback, the camera can evaluate and select the desired device for connection, ensuring both speed and accuracy in the connection establishment process.
3Device complexity
If a digital camera with limited resources connects to only one information processing device, then resource management is simplified, but the camera cannot connect to multiple devices
Solution Approach 1:
The connection process is segmented into distinct phases: service initiation phase where packets are transmitted to multiple devices, response reception phase where device information is collected, and connection establishment phase where connection is formed with the selected device. This segmentation allows the camera to manage multiple device interactions systematically without overwhelming its limited resources, as each phase handles specific tasks independently.
Solution Approach 2:
The camera performs preliminary service initiation to multiple devices before actual connection establishment, allowing it to evaluate multiple devices and select the desired one. This preliminary action enables multi-device capability while maintaining simplified resource management during the actual connection phase, as the camera only maintains one active connection at a time.
Data Source
AI summary
A communication device according to one aspect of the present invention includes: an input and output unit; a communication unit; and a controller. The input and output unit is configured to receive a first instruction relating to activation of service. The communication unit is configured to communicate with a plurality of other communication devices. The controller is configured to, when the input and output unit receives the first instruction, control the communication unit to transmit to the other communication devices, first data indicating the activation of service. The controller is configured to, in a first case that the first instruction includes no identifiers of the other communication devices, control the communication unit to transmit to the other communication devices which transmits a connection request to the communication device in response to the first data, a negative response indicating non-acknowledgment of the connection request.