Dual-Method Communication Terminal for Short-Range Data Exchange
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Solution Overview
Problem
In short-distance communication scenarios where relative distances between communication terminal devices change, the time available for communication is limited due to the need to exchange connection information such as authentication and IP address acquisition, which reduces the communication period.
Innovation Solution
A communication terminal device employs a first communication method to exchange connection information necessary for a second communication method, such as wireless LAN, in advance to minimize overhead and extend the communication time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection information exchange is performed before short-distance communication starts, then communication reliability is improved, but the available communication time is reduced
Solution Approach 1:
The patent applies preliminary action by having the first communication unit exchange connection information (such as authentication credentials and IP address configuration data) before the second communication unit actually starts wireless LAN communication. This allows the connection setup to be completed in advance, so when the short-distance communication window opens, the devices are already ready to exchange data immediately without time loss for connection establishment.
2Productivity
If short-distance communication is used for direct device-to-device communication, then communication cost is reduced and bandwidth is increased, but the communication range is limited
Solution Approach 1:
The patent segments the communication process into two distinct phases using different communication methods: a first communication method (such as cellular or infrastructure-based wireless) for long-distance connection information exchange, and a second communication method (wireless LAN) for high-speed short-distance data transfer. This segmentation allows each method to operate in its optimal range and performance regime, combining the advantages of both long-range connectivity and high-speed local communication.
Solution Approach 2:
The first communication unit acts as an intermediary that prepares and transfers connection information to the second communication unit. This intermediary mechanism allows the wireless LAN communication to start immediately when the devices are in range, without requiring the second communication unit to perform connection setup procedures during the actual short-distance communication window, thereby maximizing the effective communication time.
3Loss of time
If position and movement information exchange is performed before communication, then the timing of communication start is optimized, but additional communication overhead is introduced
Solution Approach 1:
The patent extracts the connection information exchange from the main wireless LAN communication process and handles it separately through the first communication unit before the second communication unit initiates data transfer. This extraction allows position and movement information to be used for timing optimization without requiring these parameters to be transmitted as part of the main communication payload, thereby reducing the overall communication data volume.
Data Source
AI summary
A communication terminal device includes a first communication unit that is configured to communicate with another communication terminal device by a first communication method; and a second communication unit that is configured to communicate with the other communication terminal device by a second communication method that is different from the first communication method. The first communication unit is configured to exchange connection information necessary for the second communication unit to start communication with the other communication terminal device before the second communication unit starts the communication.