Carrier Aggregation Transition Modules Reduce Interface Bandwidth
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Solution Overview
Problem
Current Carrier Aggregation (CA) technologies face challenges in implementing inter-site and inter-board CA due to high interface bandwidth requirements, limiting data transmission speeds and preventing widespread deployment.
Innovation Solution
A data transmission system and method that involves a first device processing a primary carrier and a second device processing a secondary carrier, with scheduling units and transition modules that group and transmit data packets across layers, allowing for efficient data packet acquisition and transmission without being limited by inter-device interface bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Carrier Aggregation technology is implemented between devices, then data transmission capability is improved, but interface bandwidth requirement increases
Solution Approach 1:
The patent segments the data transmission process by introducing separate transition modules for different carriers (first transition module for primary carrier, second transition module for secondary carrier). Each transition module independently manages data packets for its respective carrier, allowing parallel processing and reducing the bandwidth burden on any single interface.
Solution Approach 2:
The patent introduces transition modules as intermediary components between the RLC layer and MAC layer. These transition modules act as mediators that buffer, manage, and coordinate data packets across multiple carriers, enabling efficient inter-device CA implementation without requiring excessively high interface bandwidth.
2Loss of time
If data transmission from RLC layer to MAC layer is completed within 100 us, then real-time transmission requirement is met, but interface bandwidth must be very high
Solution Approach 1:
The patent divides the transmission timeline and data flow into separate segments for different carriers. Each transition module handles its own carrier's data independently, allowing simultaneous parallel transmission across multiple carriers within the 100 us window, thereby reducing the bandwidth requirement for each individual interface.
Solution Approach 2:
The transition modules perform preliminary actions by pre-managing and buffering data packets before they need to be transmitted to the MAC layer. This advance preparation allows the system to meet the 100 us real-time requirement without requiring peak bandwidth that would be excessively high.
3Adaptability or versatility
If inter-site CA deployment is implemented, then network coverage and capacity are improved, but interface bandwidth bottleneck prevents deployment
Solution Approach 1:
The transition modules serve as intermediary components that enable inter-site CA deployment by managing data packets between different base stations. They coordinate the data flow and timing, allowing inter-site CA to function without requiring the interface bandwidth that would otherwise be needed for direct inter-base station communication.
4Productivity
If data is transmitted from PDCP to RLC at low speed and then to all MAC layers at high speed within 100 us, then scheduling efficiency is improved, but inter-board interface bandwidth requirement increases
Solution Approach 1:
The patent segments the high-speed data transmission path by introducing carrier-specific transition modules. Instead of transmitting all data to all MAC layers through a single high-bandwidth inter-board interface, the system divides the data flow into separate paths for different carriers, each handled by its own transition module, thereby maintaining scheduling efficiency while reducing inter-board bandwidth requirements.
Data Source
AI summary
Embodiments of the present invention provide a data transmission method, device, and system. A first device is configured to serve a primary carrier, and the first device includes: a first unit configured to process an RLC layer, a second unit configured to process a MAC layer, a third unit configured to process a PDCP layer, and a first scheduling unit. The first unit includes a first control module and a first transition module. The second transition module is configured to: receive the N data packets and scheduling information sent by all scheduling units in the system, acquire, according to all or a part of the received scheduling information and from the N data packets a data packet that needs to be transmitted on the secondary carrier, and send the data packet acquired by the second transition module to the fifth unit.