Base Station Timing Synchronization for Carrier Aggregation
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Solution Overview
Problem
Current multicarrier communication systems face challenges in managing signal timing and resource allocation across multiple carriers, particularly in scenarios with high data traffic and diverse user demands, where efficient spectrum utilization is critical to meet increasing data rates and mobility requirements.
Innovation Solution
The implementation of carrier aggregation (CA) and dual connectivity (DC) techniques, combined with advanced modulation schemes like OFDM, enables dynamic resource allocation and timing synchronization across multiple carriers, allowing for efficient use of both licensed and unlicensed spectrum, and supports high data rates and seamless mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation and dual connectivity techniques are implemented to increase network capacity and data rates, then spectrum utilization and mobility are improved, but device complexity and signal timing management become more difficult
Solution Approach 1:
The patent introduces a base station as an intermediary entity that centrally manages timing synchronization for carrier aggregation and dual connectivity operations. The base station receives timing advance commands from the network and distributes appropriate timing adjustments to multiple component carriers, thereby mediating the complex timing management between the network and the wireless device without requiring the device to independently manage all timing aspects of multiple carriers simultaneously
Solution Approach 2:
The patent segments the timing management function into separate components: network-level timing control, base station-level distribution, and device-level execution. By dividing the timing synchronization task across these hierarchical levels and separating timing management for different component carriers into distinct timing advance groups, the overall complexity is reduced while maintaining precise synchronization across aggregated carriers
2Speed
If dynamic resource allocation across multiple carriers is implemented to meet diverse user demands, then data rates are improved, but resource allocation complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation by enabling the base station to flexibly assign different component carriers to different users based on real-time channel conditions, traffic demands, and QoS requirements. The system dynamically adjusts which carriers are activated, how resources are distributed across carriers, and timing parameters for each user equipment, allowing data rates to adapt to changing conditions without requiring static pre-configuration
Solution Approach 2:
The patent creates a universal resource allocation framework that can handle diverse user demands across multiple carriers through a common base station controller. This multi-functional system can simultaneously manage different types of traffic (e.g., voice, data, video), different QoS requirements, and different user priorities using the same set of component carriers and resource allocation mechanisms, thereby supporting high data rates for various applications without requiring separate dedicated systems for each service type
Data Source
AI summary
A base station receives, from a wireless device, a resume request message comprising a resume identity. A retrieve user equipment context request message comprising the resume identity is sent to a second base station. A response message is received from the second base station. The response message comprises one or more temporary mobile group identities (TMGIs) of one or more multimedia broadcast multicast service (MBMS) services that the wireless device is receiving or interested to receive. Transport blocks of the one or more MBMS services is transmitted to the wireless device.