Enhanced Subframe Configuration for TD-LTE User Plane Delay Reduction
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Solution Overview
Problem
The existing TD-LTE frame structure in wireless communication systems experiences higher user plane delay compared to FDD systems, which affects system performance and makes it difficult to achieve similar delay performance.
Innovation Solution
A method and device for transmitting data using a radio frame with enhanced subframes that include adjustable UL and DL portions, allowing for flexible configuration of OFDM symbols and guard periods to optimize transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing TD-LTE frame structure is used, then service flexibility is maintained, but user plane delay increases
Solution Approach 1:
The subframe is segmented into multiple slots, and each slot can be independently configured as uplink or downlink. This fine-grained segmentation allows the system to flexibly adapt to different service requirements while reducing the time delay by enabling more frequent uplink transmission opportunities without compromising overall service flexibility.
Solution Approach 2:
The patent implements dynamic slot configuration where the direction (uplink or downlink) of each slot can be dynamically adjusted based on real-time traffic conditions. This dynamic approach enables the system to optimize user plane delay by quickly responding to uplink traffic demands while maintaining the ability to adapt to various service types and proportions.
2Productivity
If existing TD-LTE frame structure is used, then network planning simplicity is maintained, but system performance decreases
Solution Approach 1:
By dividing the subframe into multiple configurable slots, the system achieves better performance through increased transmission opportunities. The segmentation enables more granular control over resource allocation, improving productivity while the standardized slot structure keeps the complexity manageable through pattern-based configuration.
Solution Approach 2:
The patent changes the configurable parameters from subframe-level to slot-level, allowing independent optimization of each slot's direction and length. This parameter change enables fine-tuned performance optimization while maintaining network planning simplicity through standardized configuration patterns and templates.
3Loss of time
If static uplink/downlink slot division is used, then configuration simplicity is maintained, but user plane delay doubles compared to FDD
Solution Approach 1:
The patent transitions from static to dynamic slot configuration, allowing the system to adapt slot directions based on real-time traffic conditions. This dynamic approach reduces user plane delay by enabling quicker response to uplink traffic demands while maintaining configuration simplicity through standardized patterns and automated management.
Solution Approach 2:
The patent implements periodic slot configuration patterns that repeat over time, providing regular uplink transmission opportunities. This periodic structure reduces user plane delay by ensuring frequent uplink access while maintaining configuration simplicity through the repetition of standardized patterns rather than requiring complex one-time configurations.
Data Source
AI summary
A method and device for transmitting data, which are used for solving the problems in the prior art that an existing frame structure would increase the user-plane delay of a TD-LTE system and decrease the system performance. A wireless frame transmitted between a network side device and a terminal comprises a reinforced sub-frame, and the reinforced sub-frame comprises a UL portion and a DL portion. A TDD frame structure of the embodiments of the present invention can decrease the user-plane delay on the basis of maintaining the service flexibility, and also can maintain the backward compatibility of a system.