Dual Mode Communication Handover for Power and Speed Trade-offs
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Solution Overview
Problem
Existing communication methods fail to effectively manage communication errors during handovers from short-range wireless communication to wireless LAN, particularly in scenarios where Bluetooth connection failures occur, due to power consumption and range limitations.
Innovation Solution
A communication apparatus with both short-range wireless and wireless LAN communication units, where the control unit manages handovers and sets higher retransmission frequencies for Bluetooth when initial connections fail, ensuring lower power consumption and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Bluetooth communication is used for data transmission, then power consumption is reduced, but communication distance and communication speed are limited
Solution Approach 1:
The system dynamically switches between Bluetooth and wireless LAN communication modes based on connection status. When Bluetooth connection fails, it automatically transitions to wireless LAN for data transmission, making the communication system adaptive to different conditions while optimizing both power consumption and communication speed
2Use of energy by moving object
If Bluetooth communication is used for data transmission, then power consumption is reduced, but communication distance is limited
Solution Approach 1:
The communication system dynamically adjusts the communication method based on connection establishment status. When Bluetooth connection fails due to distance or other factors, the system switches to wireless LAN communication, thereby extending the effective communication distance while maintaining power efficiency
3Reliability
If retransmission frequency for Bluetooth is increased when connection fails, then connectivity reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts retransmission frequency based on connection status. When Bluetooth connection fails, high-frequency retransmission is performed temporarily to establish connection. Once connected or if connection is definitively failed, the system switches to wireless LAN, thereby limiting power consumption while ensuring connectivity reliability during the critical connection phase
Solution Approach 2:
The control unit performs connection establishment processing at predetermined intervals when Bluetooth connection fails. This periodic action allows the system to attempt connection recovery without continuous operation, balancing reliability improvement with power consumption control
4Speed
If wireless LAN communication is used for data transmission, then communication speed and distance are improved, but power consumption increases
Solution Approach 1:
The system uses wireless LAN communication dynamically, switching to it only when Bluetooth connection fails. This ensures high communication speed and extended distance when necessary, while minimizing power consumption by using it selectively rather than continuously
Data Source
AI summary
A communication apparatus that communicates with an external apparatus to transmit data to the external apparatus, the communication apparatus comprising, a first communication unit configured to communicate with the external apparatus in accordance with a first communication method, a second communication unit configured to communicate with the external apparatus in accordance with a second communication method, and a control unit configured to control operation in the first communication unit and the second communication unit, wherein the control unit controls so as to switch communication with the external apparatus to second communication by the second communication unit after performing first communication by the first communication unit, and transmit transmission target data to the external apparatus in the second communication.