LTE Carrier Aggregation Dynamic Disablement for VoLTE
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Solution Overview
Problem
Carrier Aggregation (CA) in LTE networks increases uplink interference and overhead, making it difficult to maintain optimal quality of service for latency-sensitive services like VoLTE and video over LTE, especially at the edge of cells, due to inefficient resource allocation and increased signal noise.
Innovation Solution
The LTE communication network dynamically disables CA for User Equipment (UE) when a specific Quality-of-Service (QCI) data bearer is active, such as QCI 1 for voice or QCI 2 for video, to reduce signal noise and efficiently distribute resources, allowing data exchange without CA to ensure better coverage and service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Carrier Aggregation is enabled to increase bandwidth and data transfer capacity, then data transfer rate is improved, but uplink interference and signal noise increase
Solution Approach 1:
The patent implements dynamic switching between CA and non-CA modes based on real-time service requirements. The system transitions from a static CA configuration to a dynamic one where the network can enable or disable CA depending on whether latency-sensitive services are active, thereby adapting the bandwidth allocation to current needs while controlling interference levels.
Solution Approach 2:
The patent changes the operational parameters of the communication system by switching between two distinct states: CA enabled state (for high data transfer) and CA disabled state (for low interference). This parameter change allows the system to optimize performance characteristics based on service type, transforming the fixed parameter approach into a variable one.
2Productivity
If Carrier Aggregation is enabled to allocate more resource blocks to a UE, then data transfer capacity is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts resource allocation by switching CA status based on service requirements. When latency-sensitive services are active, CA is disabled to free up resource blocks for other UEs, improving overall network resource allocation efficiency. When such services are inactive, CA can be enabled to maximize data transfer capacity for active UEs.
3Productivity
If Carrier Aggregation is enabled to increase bandwidth, then signal capacity is improved, but service quality for latency-sensitive services deteriorates
Solution Approach 1:
The patent implements dynamic adaptation of the communication mode based on service type detection. The system monitors for latency-sensitive services and automatically switches between CA and non-CA modes to maintain optimal service quality, thereby resolving the contradiction between signal capacity and service reliability.
Solution Approach 2:
The system employs feedback mechanisms to detect active services and determine appropriate CA configuration. By monitoring service types and adjusting CA status accordingly, the system creates a closed-loop control that maintains service quality while utilizing signal capacity effectively.
Data Source
AI summary
A Long Term Evolution (LTE) communication network wirelessly exchanges first data with LTE User Equipment (UE) using LTE Carrier Aggregation (CA) to support at least an LTE Quality-of-Service Class Identifier 5 (QCI 5) data bearer. The LTE communication network detects if the LTE UE accepts an LTE QCI 1 data bearer while the LTE CA and the LTE QCI 5 data bearer are active. In response, LTE communication network disables the LTE CA for the LTE UE. LTE communication network wirelessly exchanges second data with the LTE UE over the LTE QCI 1 data bearer without using the LTE CA in response to disablement.