Radio Communication Device Frame Aggregation for Throughput
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Solution Overview
Problem
Current multi-user MIMO communication systems face challenges in simultaneously transmitting and receiving data within the same frequency band, leading to inefficiencies and throughput deterioration due to the need for separate transmission and reception times, and existing techniques fail to effectively combine data frames for high-rate transmission.
Innovation Solution
A radio communication device that stores and aggregates MAC frames, adjusts their transmission times to be uniform by adding additional information, and transmits these frames simultaneously, utilizing techniques like frame aggregation in IEEE 802.11n to separate transmission and reception times efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission times are separated for multiple users in multi-user MIMO, then reception reliability is improved, but throughput deteriorates due to time overhead
Solution Approach 1:
The patent combines multiple MAC frames for different users into a single aggregated frame that can be transmitted simultaneously to multiple users in the same frequency band. This merging approach eliminates the need for separate transmission times while maintaining reliable reception through proper frame structure design including user identification fields and individual frame delimiters.
2Reliability
If Ack Requests are transmitted to ensure reception, then reception reliability is improved, but overhead time increases and throughput deteriorates
Solution Approach 1:
The patent extracts the acknowledgment mechanism from the data transmission process by incorporating acknowledgment fields directly within the aggregated data frames themselves. This eliminates the need for separate Ack Request frames and their associated overhead time, while still providing reliable reception confirmation through the embedded acknowledgment information.
3Measurement precision
If data frames are transmitted separately to maintain timing control, then transmission timing precision is improved, but transmission efficiency deteriorates
Solution Approach 1:
The patent merges multiple data frames into a single aggregated frame structure that contains user identification fields, individual frame delimiters, and timing synchronization information. This merging enables simultaneous transmission to multiple users while maintaining precise timing control through the embedded synchronization fields and structured frame delimiters that allow each user to identify and process their designated data.
Data Source
AI summary
A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time.