Configured Starting Position for Wireless Network LBT
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing carrier aggregation and spectrum utilization, particularly in meeting increasing data traffic demands and seamless mobility requirements, especially when using licensed and unlicensed spectrums.
Innovation Solution
The implementation of carrier aggregation techniques, including Listen-Before-Talk (LBT) procedures, adaptive energy detection thresholds, and dynamic resource allocation across multiple carriers, enables efficient use of both licensed and unlicensed spectrums, optimizing network efficiency and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented to increase network capacity, then network capacity and data rates are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the uplink transmission by dividing it into multiple parts: a first uplink transmission on a first carrier and a second uplink transmission on a second carrier. This segmentation allows the system to aggregate multiple carriers for increased capacity while managing complexity by treating each carrier transmission as a separate, manageable unit with its own timing advance group configuration.
Solution Approach 2:
The patent introduces a new dimension of management by creating separate timing advance groups (TAGs) for different carriers. Instead of managing all carriers with a single timing advance parameter, the system now operates in a multi-dimensional space where each TAG can be independently configured and managed, reducing the complexity of synchronizing multiple carriers.
2Productivity
If dynamic resource allocation across multiple carriers is implemented, then spectrum utilization is optimized, but control signaling overhead and management complexity increase
Solution Approach 1:
The patent creates a universal framework where multiple carriers can be managed through a common carrier aggregation mechanism. The first and second uplink transmissions on different carriers follow a unified structure with separate TAG configurations, allowing the system to optimize spectrum utilization across multiple carriers while managing complexity through a consistent, multi-functional approach that can be applied to any number of aggregated carriers.
3Reliability
If Listen-Before-Talk procedures are implemented for unlicensed spectrum access, then fair coexistence with other technologies is achieved, but access delay and reduced throughput occur
Solution Approach 1:
The patent applies preliminary action by implementing Listen-Before-Talk (LBT) procedures before uplink transmissions on unlicensed carriers. The system performs clear channel assessment and LBT checks on the second carrier before initiating the second uplink transmission, ensuring fair coexistence with other technologies. This preliminary verification step prevents collisions and ensures reliable spectrum sharing, even though it introduces some access delay.
Data Source
AI summary
Configuration parameters for a wireless device may comprise an energy detection threshold offset that may be used to adjust an energy detection threshold of an listen-before-talk (LBT) procedure. One or more transmissions may be based on the LBT procedure indicating a clear channel. The one or more transmissions may start from a configured starting position.