Mobile Relay Waveform Storage for Short Satellite Contact Windows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of limited communication time due to the movement of a relay apparatus, such as a low Earth orbit satellite, limits the effective communication between IoT terminals and base stations.
Innovation Solution
A wireless communication system and method that involves a mobile relay apparatus storing waveform data of received signals and transmitting them at opportune times when communication with a base station is possible, allowing for non-regenerative relay of data between moving relay apparatuses and stationary terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a relay apparatus is mounted on a low Earth orbit satellite that moves, then the coverage area can be extended to remote locations, but the communication time between the relay apparatus and ground-based communication apparatuses is limited
Solution Approach 1:
The relay apparatus performs preliminary actions by storing waveform data of received signals in its storage unit during the limited communication window. This allows the relayed signal to be transmitted to the destination communication apparatus at an appropriate time even after the relay apparatus has moved out of communication range, effectively extending the communication duration without requiring continuous contact.
2Productivity
If the relay apparatus stores and transmits waveform data at optimal timing, then communication efficiency is improved, but the complexity of the relay apparatus increases
Solution Approach 1:
The relay apparatus creates a copy of the received signal in the form of waveform data and stores it in the storage unit. This copied waveform data can then be transmitted to the destination communication apparatus at an optimal time determined by the control unit, improving communication efficiency without requiring complex real-time signal processing or coordination mechanisms.
Solution Approach 2:
The storage unit acts as an intermediary between the signal reception and transmission processes. It temporarily holds the waveform data, allowing the relay apparatus to decouple the reception and transmission timing. This intermediary mechanism simplifies the overall system by providing a buffer that enables flexible timing optimization without requiring complex synchronization protocols.
Data Source
AI summary
A mobile relay apparatus includes a first signal reception unit, a storage unit, and a second signal transmission unit. The first signal reception unit receives a first signal transmitted by a first communication apparatus. The storage unit stores waveform data indicating a waveform of the first signal. The second signal transmission unit transmits a second signal indicating the stored waveform data at a timing at which communication with the second communication apparatus is possible. The second communication apparatus includes a second signal reception unit, a second signal reception processing unit, and a first signal reception processing unit. The second signal reception unit receives a second signal. The second signal reception processing unit receiving the second signal to acquire waveform data. The first signal reception processing unit receiving the first signal indicated by the waveform data to acquire data set in the first signal by the first communication apparatus.