Multi-Carrier Transmission with Segmented Modulation by Device Capability
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Solution Overview
Problem
Existing multi-carrier transmission systems, such as DOCSIS, are inefficient as they tailor data signals to the lowest common denominator of receiving devices, underutilizing higher performing devices and reducing overall system efficiency.
Innovation Solution
A hybrid multi-carrier transmission system that includes a control data portion for synchronization and a user data portion adaptable to individual device capabilities, allowing higher modulation orders for capable devices, thereby optimizing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the data signal is tailored to the lowest common denominator of receiving devices, then all CPE devices can receive and process the signal, but higher performing devices cannot utilize their capabilities and system efficiency is reduced
Solution Approach 1:
The signal is divided into a control data portion and a user data portion. The control data portion is transmitted at a first modulation order that all CPE devices can process, ensuring compatibility. The user data portion is transmitted at a second modulation order that utilizes higher capabilities of advanced devices, thereby improving overall system efficiency and productivity.
2Reliability
If a continuous signal is transmitted for all CPE devices, then synchronization and keep-alive are maintained, but data transmission efficiency is reduced due to lowest common denominator constraints
Solution Approach 1:
The transmitted signal is segmented into two distinct portions: a control data portion that maintains synchronization and keep-alive functionality at a reliable first modulation order, and a user data portion that achieves higher data transmission efficiency at a second modulation order optimized for capable devices.
Solution Approach 2:
Different portions of the signal are assigned different modulation orders appropriate to their specific functions. The control data portion uses a conservative first modulation order ensuring reliable reception by all devices, while the user data portion uses a higher second modulation order to maximize efficiency where capable.
3Adaptability or versatility
If the data signal is set to the performance level of the lowest performing CPE device, then all devices can receive the signal, but the capabilities of higher performing devices are underutilized
Solution Approach 1:
The signal transmission is segmented such that the control data portion is sent at a first modulation order compatible with all CPE devices, while the user data portion is transmitted at a second modulation order that exploits the capabilities of higher performing devices, thereby increasing overall data transmission capacity without compromising reception by lower capability devices.
Solution Approach 2:
Different modulation orders are applied to different portions of the signal based on their specific requirements. The control data portion uses a conservative approach for universal reception, while the user data portion uses an optimized higher modulation order to maximize data transmission capacity for capable devices.
Data Source
AI summary
A multi-carrier transmission system configured to enable variable modulation order reception is contemplated. The system may be configured to facilitate delivery of high-speed data (HSD) over frequency division duplexing (FDD) and/or time division duplexing (TDD) infrastructures to a plurality of receiving devices. Signaling used to facilitate delivery of the HSD may be selectively and dynamically modulated according to performance capabilities of the receiving devices for a given transmission interval.