Self-Contained TDD Subframe Structure for Bi-Directional Wireless Communication
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Solution Overview
Problem
Time division duplex (TDD) communication systems face challenges in achieving full-duplex communication at short timescales, as devices can only transmit or receive data in one direction at a time, limiting bi-directional data exchange within a subframe.
Innovation Solution
Implementing a self-contained subframe structure for TDD carriers that includes a header, control, data, and acknowledgement portions, allowing bi-directional data exchange within the same subframe, with extended header or trailer portions for additional handshaking and data communication functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TDD systems use traditional subframe structure with separate uplink and downlink subframes, then devices can transmit or receive in one direction at a time, but bi-directional data exchange within a subframe is limited
Solution Approach 1:
The patent merges control information, data transmission, and acknowledgment into a single self-contained subframe structure. The downlink subframe includes both downlink data and uplink grant information, while the uplink subframe contains both uplink data and downlink acknowledgment, enabling bi-directional communication within one subframe period and eliminating the need for separate subframes for each direction.
Solution Approach 2:
The subframe is segmented into distinct functional portions: control portion for scheduling information, data portion for payload transmission, and acknowledgment portion for feedback. This segmentation allows each portion to be optimized independently while working together within the same subframe to achieve efficient bi-directional communication.
2Productivity
If TDD systems implement self-contained subframe structure with control, data, and acknowledgment portions, then bi-directional communication is enabled within a subframe, but subframe structure complexity increases
Solution Approach 1:
The self-contained subframe structure serves multiple functions simultaneously: it carries control information for scheduling, transmits data payloads in both directions, and provides acknowledgment feedback. This multi-functionality is achieved within a unified subframe structure that can be applied to both downlink and uplink transmissions, reducing the need for separate specialized structures for each function.
Solution Approach 2:
The subframe structure is designed to be dynamic and flexible, allowing the control portion, data portion, and acknowledgment portion to be configured adaptively based on traffic requirements. The relative sizes and positions of these portions can be adjusted to optimize performance for different communication scenarios while maintaining the self-contained structure.
Data Source
AI summary
Aspects of the present disclosure provide a self-contained subframe structure for time division duplex (TDD) carriers. Information transmitted on a TDD carrier may be grouped into subframes, and each subframe can provide communications in both directions (e.g., uplink and downlink) to enable such communications without needing further information in another subframe. In one aspect of the disclosure, a single subframe may include scheduling information, data transmission corresponding to the scheduling information, and acknowledgment packets corresponding to the data transmission. Furthermore, the subframe may additionally include a header and/or a trailer to provide certain bi-directional communications functions.