Communication Apparatus Preamble Transfer Delay Reduction
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Solution Overview
Problem
The existing communication apparatuses face transmission delays due to the need to receive a field describing the allowable number of transfers before starting frame transfer, which increases signal relaying delay in artificial satellite communication.
Innovation Solution
The communication apparatus is configured to determine the number of transfers based on the preamble patterns in the communication signal, allowing for immediate transfer initiation and minimizing delay by using a buffer unit and coefficient calculation to manage interference and distortion, with a maximum number of transfers set to two in the described embodiment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the allowable number of transfers is described in a message field following preamble and data length, then the number of transfers can be limited, but transmission delay increases because the communication apparatus cannot start transferring until receiving the field
Solution Approach 1:
The maximum number of transfers is predetermined and stored in the communication apparatus before actual communication occurs. This preliminary setup eliminates the need to receive and process the transfer limit field during message transmission, allowing immediate transfer initiation while maintaining reliable transfer control through the pre-stored maximum value.
2Reliability
If signal relaying is performed in artificial satellite communication, then direct wave obstruction is overcome, but transmission delay increases due to multiple relaying steps
Solution Approach 1:
The invention changes the parameter of transfer limit control from dynamic field-based control to static predetermined-value control. By using a predetermined maximum number of transfers stored in advance, the system maintains reliable transfer control while reducing the time required for transfer decisions, thereby minimizing transmission delay in multi-relay satellite communication scenarios.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A communication apparatus (1) includes: a reception unit (111) that receives a communication signal; a preamble detection unit (113) that detects a preamble pattern from the communication signal; and a transfer processing unit (117) that, when the preamble pattern detected by the preamble detection unit (113) is a predetermined preamble pattern, changes the preamble pattern included in the communication signal in accordance with a predetermined rule, and transfers the changed preamble pattern.