Communication Apparatus Signal Level Control
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Solution Overview
Problem
Existing multi-carrier communication systems using power lines are inefficient as they cannot utilize the network simultaneously for AV device communications and other devices, leading to suboptimal network usage.
Innovation Solution
A multi-carrier communication apparatus and method that modulates digital data into an analog signal with a controlled output level, allowing separation of AV device communications from the network, enabling efficient use by other devices on the same transmission line through a digital circuit and analog circuit combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AV devices perform stream communication between specific devices using multi-carrier communication, then communication quality is maintained, but network efficiency deteriorates because other devices cannot use the network simultaneously
Solution Approach 1:
The patent segments the communication network into different priority levels by controlling signal output levels. AV device communications are separated from general network traffic through level control, allowing simultaneous operation without mutual interference. This segmentation resolves the contradiction by enabling reliable AV communication while maintaining network efficiency for other devices.
Solution Approach 2:
The patent implements dynamic control of signal output levels based on communication type. The integrated circuit adjusts the output level of multi-carrier signals in real-time, lowering levels for AV device communications and maintaining normal levels for general network traffic. This dynamic adjustment allows the system to adapt to different communication needs, resolving the contradiction between communication quality and network efficiency.
2Productivity
If the output level of the signal is lowered to allow other communications on the same transmission line, then network efficiency improves, but communication quality may deteriorate
Solution Approach 1:
The patent applies local quality control by adjusting signal output levels specifically for AV device communications while maintaining normal signal levels for other network traffic. The integrated circuit identifies AV device communications and selectively lowers their output levels, ensuring that communication quality is maintained for those specific devices while improving overall network efficiency. This localized adjustment resolves the contradiction between network efficiency and communication quality.
Solution Approach 2:
The patent changes the output level parameter of the multi-carrier signal dynamically based on communication requirements. The integrated circuit modifies this parameter to lower levels for AV device communications, enabling other devices to use the network simultaneously without compromising the communication quality of AV devices through improper level reduction. This parameter change resolves the contradiction by optimizing signal levels for different communication types.
Data Source
AI summary
A transmitted digital signal from a digital signal processor is converted into an analog signal at an analog circuit, and then transmitted from transmission lines via a communication transformer. A communication apparatus has a plurality of communication modes that perform communication in different communication ranges. A controller in the digital signal processor changes an output level of the transmitted signal according to the communication modes. More specifically, the controller detects communication quality of the transmitted signal and lowers the output level of the transmitted signal within a range where the detected communication quality does not fall below predetermined quality.