OTFS LTE Coexistence via Beam Precoding and Signal Separation
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Solution Overview
Problem
Current wireless communication networks face bandwidth shortages due to the rapid growth in wireless data traffic, necessitating the coexistence of next-generation orthogonal time frequency space (OTFS) and legacy Long Term Evolution (LTE) systems to maintain high-quality service during the transition to new wireless technologies.
Innovation Solution
The implementation of a wireless communication system that allows simultaneous operation of OTFS and LTE protocols by generating transmission beams for user equipment operating on both protocols, precoding and modulating data packets according to their respective schemes, and using spatial signal separation processing to recover data packets, enabling coexistence without disrupting existing LTE infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If next-generation OTFS technology is deployed to increase bandwidth capacity, then wireless data traffic handling capability is improved, but compatibility with legacy LTE infrastructure deteriorates
Solution Approach 1:
The patent segments the wireless communication system into distinct OTFS and LTE protocol domains, allowing each protocol to operate independently with its own processing chain. The base station and user equipment are divided into protocol-specific components that handle OTFS or LTE traffic separately, enabling next-generation capacity improvements while preserving legacy infrastructure compatibility through isolated operation
Solution Approach 2:
The patent introduces a protocol dimension to the wireless communication system, where OTFS and LTE operate in separate protocol layers or domains. This dimensional separation allows the system to accommodate both legacy LTE infrastructure and next-generation OTFS technology simultaneously, with each protocol occupying its own operational dimension without interfering with the other
2Productivity
If simultaneous transmission of LTE and OTFS signals is implemented, then spectrum utilization is improved, but signal separation and recovery complexity increases
Solution Approach 1:
The patent segments transmitted signals into distinct LTE and OTFS signal streams that are processed separately through dedicated transmission paths. At the receiver side, signals are segmented into protocol-specific reception chains that independently process LTE or OTFS transmissions, reducing the complexity of signal separation by maintaining clear protocol boundaries throughout the transmission and reception process
Solution Approach 2:
The patent introduces protocol identification mechanisms and separation interfaces that act as intermediaries between the mixed LTE and OTFS signal streams and the protocol-specific processing chains. These intermediary components automatically route and separate signals based on protocol type, simplifying the overall signal separation task by providing structured intermediate processing steps
Data Source
AI summary
Co-existence between an Orthogonal Time Frequency Space (OTFS) modulation system and a Long Term Evolution (LTE) system is achieved by generating a number of transmission beams for a first group of user equipment operating using LTE, and a second group of user equipment operating using the OTFS protocol, and transmitting a first group of data packets formatted according to the LTE protocol to the first group of user equipment and a second group of data packets formatted according to the OTFS protocol to the second group of user equipment. The transmissions are performed by precoding and modulating the first group of data packets according to an LTE modulation scheme, and precoding and modulating the second group of data packets according to an OTFS modulation scheme.