Hybrid Modem Link Optimization via Frequency Band Segmentation
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Solution Overview
Problem
Existing communication systems for vehicles face issues with bi-directional links being unavailable, slow, or malfunctioning, leading to inconsistent data services and limited bandwidth, which affects the user experience and reliability of on-board data services.
Innovation Solution
A hybrid communications system that utilizes multiple forward and reverse links operating in different frequency bands to efficiently deliver data to and from vehicles, allowing for the selection of optimal communication paths based on feedback and content type, thereby optimizing modem usage and adhering to regulatory constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bi-directional communication link is used for all data transmissions, then the system structure is simple, but the bandwidth is limited and service consistency deteriorates
Solution Approach 1:
The patent segments the communication link into separate forward links (download) and reverse links (upload), each operating on different frequency bands. This allows independent optimization of each direction's bandwidth and performance characteristics, resolving the contradiction between simple structure and sufficient bandwidth.
2Ease of operation
If all communications traverse the same bi-directional link, then the system is easy to manage, but service consistency and user experience deteriorate
Solution Approach 1:
The patent applies different quality characteristics to different communication directions by allocating separate forward and reverse links on different frequency bands. Each link can be optimized for its specific function (download vs. upload), ensuring consistent and reliable service for each type of communication.
3Device complexity
If the bi-directional link is used for both forward and reverse communications, then the system structure is simple, but the bandwidth allocation is insufficient for optimal performance
Solution Approach 1:
The patent transitions from a single-dimensional bi-directional link to a multi-dimensional communication architecture by introducing separate frequency bands for forward and reverse links. This dimensional expansion enables significantly higher data throughput while maintaining manageable system complexity through clear separation of functions.
Data Source
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AI summary
Techniques for optimizing modem use for data delivery to vehicles that are near to or parked at ports include using a high-capacity forward communications link, in a first frequency band, to support a logical forward link of a data tunnel via which data is delivered between a data provider and the vehicle. Instead of using the reverse communications link of the first frequency band, though, a reverse communications link in a different frequency band is used to support the reverse logical link of the data tunnel, as reverse data typically requires less bandwidth. Thus, the forward communications link is used in a high-throughput, unidirectional manner. Forward data may be multiplexed and/or multicast, and in some cases, multiple forward communications links may be used in parallel to support the logical forward link of the data tunnel.