Single-Antenna Concurrent LTE-NR Transmission Using Orthogonal Coding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Concurrently operating 4G LTE and 5G NR access nodes at a cell site face challenges in avoiding interference due to the need for separate RF resources and antenna transmissions, which is restrictive due to RF spectrum licensing costs and coverage constraints.
Innovation Solution
The access nodes orthogonally code their respective data sequences, combine them, and transmit the combined sequence from a single antenna with multiple phase delays to ensure successful receipt by the user equipment, simulating a multi-path or transmit-diversity effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate RF resources and antenna transmissions are used for 4G LTE and 5G NR access nodes, then interference between the two systems is avoided, but RF spectrum licensing costs increase and coverage constraints are worsened
Solution Approach 1:
The patent combines 4G LTE and 5G NR data sequences into a single combined sequence that is transmitted through one antenna. The access node orthogonally codes both data sequences and merges them, eliminating the need for separate antenna transmissions while avoiding interference through orthogonal coding rather than spatial separation.
Solution Approach 2:
The single antenna is made multi-functional by enabling it to transmit both 4G LTE and 5G NR signals simultaneously through orthogonal coding. The antenna structure serves both communication standards without requiring dedicated antennas for each system, optimizing resource utilization.
2Productivity
If multiple access nodes transmit data concurrently, then peak data rates increase and user experience improves, but interference between transmissions occurs
Solution Approach 1:
The patent merges multiple data sequences from different access nodes into a single combined sequence before transmission. By orthogonal coding and combining the sequences at the access node level, the system achieves concurrent transmission capability while eliminating interference that would occur with separate physical transmissions.
Solution Approach 2:
The orthogonal coding mechanism acts as an intermediary that processes multiple data sequences before transmission. This intermediary transformation allows concurrent data streams to coexist in the same transmission medium without interference, enabling high peak data rates without the harmful effects of direct signal interference.
3Reliability
If separate antenna transmissions are used for different RATs, then signal isolation is achieved, but device complexity and RF resource requirements increase
Solution Approach 1:
The patent merges the transmission functions of multiple antennas into a single antenna by combining data sequences orthogonally. This eliminates the need for multiple physically separate antenna systems while maintaining signal isolation through mathematical orthogonal coding rather than physical separation.
Solution Approach 2:
The patent replaces the mechanical/physical separation approach (multiple antennas) with a mathematical/signaling approach (orthogonal coding). Instead of using physical antenna isolation, the system uses orthogonal codes to achieve signal separation, substituting a mechanical system with a more efficient signaling-based solution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient concurrent data transmission from multiple access nodes without interference, enhancing user experience by increasing peak data rates while optimizing RF resource usage.
Implementation Method 1
the access nodes' respective data sequences are orthogonally coded and combined to produce a combined data sequence
Implementation Method 2
transmitting the combined data sequence from a single antenna with multiple phase delays to facilitate successful receipt of the combined data sequence by the user equipment
Implementation Method 3
simulating a multi-path or transmit-diversity effect
Data Source
AI summary
A method and a system for concurrently transmitting from an antenna a first sequence of data from a first access node and a second sequence of data from a second access node. An example method includes orthogonally encoding the first and second sequences, including encoding the first sequence with a first binary code to produce a first encoded sequence and encoding the second sequence with a second binary code to produce a second encoded sequence, combining the first encoded sequence and the second encoded sequence to produce a combined encoded sequence, and transmitting the combined encoded sequence from the antenna, with transmitting the combined encoded sequence from the antenna including engaging in a first transmission of the combined encoded sequence from the antenna and engaging in a second transmission of the combined encoded sequence from the same antenna with a phase delay compared with the first transmission.