TDD Subframe Short Transmission Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring short transmission times for low-latency control and data transmission in TDD systems, making it difficult to maintain a short time interval between control information and data, which affects overall system performance.
Innovation Solution
The method involves configuring a short DL or UL within existing subframes, allowing for shorter transmission units than traditional systems, and utilizing specific symbol configurations to support low-latency transmission, such as configuring one or more short DLs in a UL subframe or one or more short ULs in a DL subframe, while maintaining compatibility with existing TDD configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional subframe configurations are used in TDD systems, then system compatibility and stability are maintained, but transmission latency is increased and low-latency control is difficult to achieve
Solution Approach 1:
The patent segments the traditional subframe structure by introducing short DL/UL transmission units within existing subframes. Specifically, it divides subframes into different symbol configurations where certain symbols are designated for short DL or short UL transmissions, enabling low-latency control while preserving the overall subframe structure for compatibility.
Solution Approach 2:
The patent implements dynamic configuration of short DL/UL positions within subframes based on traffic requirements. The system can flexibly adjust the number and position of short DL/UL symbols according to control data volume and latency requirements, allowing adaptive optimization without fixed rigid structure.
2Speed
If short transmission units are configured for low-latency control, then transmission speed is improved, but system complexity and configuration difficulty increase
Solution Approach 1:
The patent applies partial action by introducing short DL/UL only in specific symbols within subframes rather than changing the entire subframe structure. This allows low-latency transmission for control data while keeping the majority of the subframe structure unchanged, reducing configuration complexity.
Solution Approach 2:
The patent designs the short DL/UL configuration to serve multiple functions: it enables low-latency control transmission, maintains compatibility with existing TDD systems, and allows flexible adaptation to different traffic conditions. The same framework supports both traditional and short transmission modes within the same system.
3Loss of time
If traditional subframe structures are maintained, then system compatibility is preserved, but the time interval between control information and data cannot be shortened
Solution Approach 1:
The patent nests short DL/UL transmission units within the existing subframe structure. The short transmissions are embedded as specific symbols inside the traditional subframe framework, allowing the system to maintain outer-layer compatibility while enabling inner-layer low-latency functionality.
Solution Approach 2:
The patent adds a new dimension to the traditional subframe structure by introducing short DL/UL symbol configurations within the time-domain structure of existing subframes. This creates a multi-layered time structure where traditional and short transmissions coexist in different temporal dimensions within the same subframe.
Data Source
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AI summary
The present invention relates to a wireless communication system. Specifically, the invention relates to a method and an apparatus for the same, the method comprising the steps of: receiving system information indicating a TDD UL-DL configuration; receiving MBSFN SF allocation information; and, on the basis of a TTI configuration of SF #n, processing a signal for the SF #n, wherein if the SF #n is non-MBSFN SF, the SF #n is configured by a single TTI, and if the SF #n is MBSFN SF, the SF #n is configured by multi-TTI.