Satellite Load Balancing Gateway with Pre-Coding and ACM
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Solution Overview
Problem
Communication networks face challenges in providing high availability and quality of services to multiple terminals with varying link conditions and capabilities, as existing adaptive coding and modulation techniques trade off between bandwidth efficiency and service reliability.
Innovation Solution
A load balancing communications network that uses a gateway with pre-coding and ACM modules to dynamically adjust transmission parameters, prioritizing data and using scalable video coding to optimize bit rates and modulation schemes based on terminal capabilities and link conditions, allowing for flexible transmission methods like broadcasting, multicasting, or unicasting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lower order modulation and coding schemes are used to ensure high availability for terminals with worst link conditions, then service reliability is improved, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent segments the data transmission into multiple hierarchical layers (first level representation data and second level representation data). The first level is transmitted using lower order modulation and coding schemes for reliability, while the second level uses higher order schemes for enhanced bandwidth efficiency. This segmentation allows different parts of the data to be transmitted with different reliability requirements, resolving the contradiction between service availability and bandwidth efficiency.
Solution Approach 2:
The patent applies different modulation and coding schemes to different parts of the data transmission. Specifically, the first level representation data uses lower order schemes (higher reliability) while the second level representation data uses higher order schemes (higher bandwidth efficiency). This local differentiation of transmission quality allows the system to optimize both reliability for critical data and bandwidth efficiency for enhanced data, resolving the trade-off between service availability and bandwidth efficiency.
2Reliability
If the network transmits information at the most reliable modcode to ensure worst-case terminal reception, then service availability is improved, but the amount of service-related information transmitted per unit time decreases
Solution Approach 1:
The patent dynamically adjusts the transmission strategy by first transmitting the first level representation data at a lower order modcode to ensure availability for all terminals. Then, it dynamically adds the second level representation data at a higher order modcode to enhance the information transmission rate for terminals that can support it. This dynamic, two-stage transmission approach resolves the contradiction between service availability and information transmission rate by making the transmission rate adaptive to terminal capabilities.
Solution Approach 2:
The patent introduces a hierarchical dimension to the data transmission structure, organizing data into multiple levels with different reliability and efficiency characteristics. By transmitting data across multiple dimensions (first level and second level representation data), the system can simultaneously ensure service availability for all terminals while increasing the overall information transmission rate through the addition of higher efficiency second level data.
3Reliability
If adaptive coding and modulation dynamically adjusts coding schemes to adapt to changing link conditions, then service availability is maintained, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-transmitting the first level representation data using lower order modulation and coding schemes before transmitting the second level representation data using higher order schemes. This preliminary transmission of critical data ensures service availability is maintained even if the higher level transmission fails due to changing link conditions. The preliminary action simplifies the overall system complexity by establishing a reliable baseline before adding enhanced transmission layers.
Solution Approach 2:
The patent uses a nested structure where the second level representation data is transmitted in combination with the first level representation data. The higher order modulation and coding schemes for the second level are nested within the transmission framework established by the lower order schemes of the first level. This nesting allows the system to maintain service availability through the first level while adding complexity only where needed for enhanced service quality, thereby managing overall system complexity effectively.
Data Source
AI summary
A load balancing communications network configured to communicate with multiple data terminals includes: a first data terminal and a second data terminal; a gateway including: a source data receiver module adapted to receive first source data representing video content and second source data representing broadband data content; a pre-coder module adapted to pre-code the first source data using pre-coding schemes to generate sets of representation data; and an ACM module adapted to associate the sets of representation data with coding and modulation schemes; and a transceiver module adapted to generate a first transmission by applying the coding and modulation schemes to the sets of representation data, generate a second transmission from the second source data, and communicate the first transmission to the first data terminal and the second transmission to the second data terminal over a satellite link.