Satellite Analog Network Coding for Many-to-Many Multicast
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Solution Overview
Problem
Conventional analog network coding methods are limited to point-to-point bidirectional communication in satellite systems, making it difficult to extend to many-to-many multicast-to-multicast communication, and there is a need for enhanced security and frequency efficiency in satellite communication.
Innovation Solution
The method involves receiving transmission data from a feeder, extracting and storing it, and using a superposed signal from a satellite to obtain reception data, while also implementing data encryption and decryption using a security key generated within the satellite network, allowing for many-to-many communication and improved frequency efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional analog network coding method is used with directional antennas for point-to-point communication, then transmission and reception power efficiency is improved, but many-to-many multicast-to-multicast bidirectional communication cannot be performed
Solution Approach 1:
The patent applies universality by enabling the satellite to perform multiple communication functions simultaneously - serving both point-to-point and many-to-many multicast communication modes. The satellite receives superposed signals containing multiple data streams and can distribute them to multiple ground stations, making the system adaptable to various communication scenarios while maintaining power efficiency through analog network coding
2Quantity of substance
If analog network coding method is extended to many-to-many communication in satellite network, then frequency efficiency is improved, but communication security may be divulged during key distribution process
Solution Approach 1:
The patent segments the communication system into distinct functional components: a security station that generates and manages encryption keys separately from the analog network coding process. This segmentation allows frequency efficiency improvements from many-to-many communication while maintaining security through dedicated key management, as the encryption keys are distributed through separate secure channels independent of the multicast data transmission
3Quantity of substance
If digital network coding is used in bidirectional relay system, then frequency efficiency is improved, but implementation complexity increases compared to analog network coding
Solution Approach 1:
The patent replaces complex digital network coding operations with simpler analog signal processing. Instead of decoding, XORing, and re-encoding digital packets, the system uses analog amplification and superposition of signals. This substitution maintains frequency efficiency improvements while dramatically reducing implementation complexity, as analog processing requires only basic signal amplification and combination rather than complex digital signal processing
Data Source
AI summary
Disclosed are an apparatus and method for communicating with satellite based on analog network coding. A method for satellite communication, according to one embodiment of the present invention, is a method for satellite communication of a satellite terminal and comprises the steps of: receiving transmission data from a feeder that directly transmits the transmission data to a satellite; receiving a superposed signal, in which the transmission data and reception data corresponding to the transmission data have been analog network coded, from the satellite; and extracting the reception data from the superposed signal using the superposed signal and the received transmission data.