MIMO Frame Signaling for Accurate End Detection in MU-MIMO
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Solution Overview
Problem
In multiple input multiple output (MIMO) wireless communication systems, particularly in MU-MIMO, there is a challenge in accurately informing receivers about the end of transmitted frames, leading to inefficient frame restoration due to varying frame lengths and the need for precise length information.
Innovation Solution
The method involves generating a data frame with a signal field containing length information, using transmission duration and frame padding to ensure accurate frame restoration by including length fields in the VHT-SIG field and adjusting padding to match the longest frame duration, allowing the receiver to decode frames efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If length information is included in the PLCP preamble for frame recognition, then the receiver can identify the end of the frame, but the frame structure becomes more complex and overhead increases
Solution Approach 1:
The patent segments the frame structure into distinct components: PLCP preamble (with signal field containing length information), PLCP header, and data field. This segmentation allows length information to be embedded in the preamble without complicating the overall frame structure, as each component has a defined purpose and format.
Solution Approach 2:
The patent places length information in the PLCP preamble, which is transmitted before the actual data field. This preliminary inclusion of length information allows the receiver to prepare for accurate frame end detection before receiving the main data, improving detection accuracy without adding complexity to the data portion.
2Reliability
If frame padding is used to match the longest frame duration in MU-MIMO, then all receivers can synchronize properly, but transmission time and overhead increase
Solution Approach 1:
The patent applies frame padding selectively based on the specific MU-MIMO transmission scenario. Instead of always padding to the maximum possible length, the system determines the actual longest frame duration for each transmission and pads only to that extent, optimizing the balance between synchronization reliability and transmission efficiency.
Solution Approach 2:
The patent implements dynamic frame padding where the padding length is adjusted based on the actual data lengths being transmitted in each MU-MIMO operation. This dynamic approach allows the system to adapt to varying transmission requirements, maintaining synchronization without unnecessary time overhead.
3Manufacturing precision
If VHT-SIG field includes length information for data field, then frame restoration is accurate, but the signal field becomes more complex
Solution Approach 1:
The patent enhances the VHT-SIG field to serve multiple functions: it carries both traditional signaling information and length information for the data field. This multi-functionality allows accurate frame restoration without creating a separate structure, as the VHT-SIG field becomes a comprehensive information carrier.
Solution Approach 2:
The patent merges length information with other signaling data in the VHT-SIG field. By combining multiple types of information into a single integrated field, the patent achieves accurate frame restoration while avoiding the complexity of separate dedicated fields for each type of information.
Data Source
AI summary
The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal.