LTE eNB Spectrum Access in Converged Networks
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Solution Overview
Problem
Current fifth generation telecommunications systems face challenges in efficiently managing downlink bandwidth in unlicensed spectrum, particularly in the 5 GHz region, due to congestion and interference, which limits the effective wireless bandwidth capacity of LTE eNBs.
Innovation Solution
The system allocates resources in a converged network to allow LTE eNBs with CBSD capability to use spectrum normally associated with WiFi access points, determining available spectrum based on interference measurements and coordinating with user equipment to utilize it in LAA mode, thereby offloading traffic and increasing bandwidth capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If LTE eNBs use traditional licensed spectrum only, then network reliability is maintained, but wireless bandwidth capacity is limited due to spectrum scarcity
Solution Approach 1:
The patent combines LTE and WiFi networks into a converged network architecture, allowing LTE eNBs to access both licensed and unlicensed (WiFi) spectrum resources. This merging enables the network to pool spectrum resources from multiple sources, thereby increasing overall wireless bandwidth capacity while maintaining operational reliability through coordinated multi-connectivity.
Solution Approach 2:
The LTE eNB is enhanced with multi-functionality to operate in both traditional licensed mode and unlicensed LAA mode simultaneously. The eNB can dynamically select and switch between different spectrum types based on traffic demands and channel conditions, making the system versatile in utilizing various spectrum resources for different service requirements.
2Quantity of substance
If LTE eNBs access unlicensed WiFi spectrum, then effective wireless bandwidth capacity increases, but interference and congestion in the 5 GHz region worsen
Solution Approach 1:
The system implements dynamic spectrum access where LTE eNBs continuously monitor unlicensed spectrum conditions and adaptively adjust their transmission parameters. The eNB can dynamically switch between licensed and unlicensed spectrum, adjust transmit power, and select appropriate carriers based on real-time interference measurements, thereby increasing bandwidth utilization while mitigating interference impacts.
Solution Approach 2:
The patent introduces an intermediary coordination mechanism between LTE and WiFi networks, where the system monitors channel conditions and manages spectrum sharing. This intermediary function allocates unlicensed spectrum resources efficiently, coordinates transmission timing to avoid conflicts, and manages interference through measurements and adaptive resource allocation, reducing congestion while maximizing bandwidth capacity.
3Adaptability or versatility
If LTE eNBs implement LAA mode with WiFi spectrum sharing, then network adaptability improves, but system complexity increases due to coordination requirements
Solution Approach 1:
The patent segments the spectrum access function into distinct modules: licensed spectrum handling, unlicensed spectrum monitoring, interference measurement, and dynamic resource allocation. This segmentation allows each component to operate independently with well-defined interfaces, managing the overall system complexity while maintaining high adaptability in spectrum utilization.
Solution Approach 2:
The LTE eNB implements self-service capabilities by autonomously monitoring unlicensed channel conditions, performing interference measurements, and making independent decisions about spectrum access and resource allocation. This self-service approach reduces the need for complex external coordination mechanisms, simplifying the overall system while enabling flexible adaptability to changing spectrum conditions.
Data Source
AI summary
Various embodiments comprise systems, methods, architectures, mechanisms and apparatus for allocating resources in a converged network to support, illustratively, Long Term Evolution (LTE) Licensed Assisted Access (LAA) transmission for supplemental downlink mode. Various embodiments contemplate allowing LTE eNBs having CBSD capability to use spectrum normally associated with a wireless access point (WAP) if such spectrum can be made available based on, for example, WiFi spectrum or channel measurements of interference such as provided by UE proximate the WAP and connected to the CBSD.