WLAN Channel Aggregation Spatial Stream Mapping
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Solution Overview
Problem
Current WLAN systems face limitations in efficiently transmitting and receiving signals through channel aggregation, particularly in supporting high-speed throughput and multiple spatial streams, due to hardware complexity and increased signaling overhead.
Innovation Solution
The method involves using a single user-multi input multi output (SU-MIMO) transmission by bonding channels and mapping spatial stream sequences based on modulation and coding scheme (MCS) information, with a processor configured to transmit and receive signals through channel aggregation, utilizing a transceiver with radio frequency chains, and processing MCS information to optimize spatial stream allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel aggregation is applied to enhance throughput, then transmission rate is improved, but hardware complexity increases
Solution Approach 1:
The patent combines multiple channels (first channel and second channel) into a single aggregated channel for transmission. The header field includes MCS information for both channels, and spatial stream sequences are mapped to combined channels, allowing the system to treat multiple channels as a unified transmission unit. This merging approach enables higher throughput while avoiding the need for separate processing of each channel, thereby reducing hardware complexity.
Solution Approach 2:
The patent creates a universal mapping mechanism that can handle different numbers of spatial streams (N or 2N) across multiple channels using a single set of LDPC encoders and decoders. The same processing architecture supports both single-channel and multi-channel operations, making the hardware design more flexible and less complex while maintaining high throughput capability through channel aggregation.
2Productivity
If multiple spatial streams are supported for high-speed transmission, then transmission rate is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the signaling of multiple channels into a single header field that contains MCS information for all channels. Instead of separately signaling each channel's parameters, the system uses a unified header structure that efficiently conveys MCS information for both the first and second channels, reducing the total signaling overhead while supporting multiple spatial streams for high-speed transmission.
3Productivity
If channel aggregation is implemented, then throughput is improved, but device complexity increases
Solution Approach 1:
The patent segments the channel aggregation process into distinct mapping tables that define the relationship between spatial streams and channels. By using predefined mapping tables, the system can efficiently allocate spatial stream sequences to channels without complex real-time calculations. This segmentation of the aggregation logic into manageable mapping rules reduces device complexity while maintaining high throughput capability.
Data Source
AI summary
The present invention relates to a method performed by a station (STA) for transmitting and receiving signals in a wireless local area network (WLAN) system. More particularly, according to the present invention, when the STA performs signal transmission and reception through channel aggregation, the STA can transmit a signal by mapping spatial stream sequences of each spatial stream in individual channels based on a plurality of pieces of MCS information indicated by a transmitted and received header field or, on the contrary, by obtaining output bit values of a plurality of encoders from spatial stream sequences received through spatial streams in the individual channels. That is, the present invention is directed to a method for transmitting and receiving signals in the above-described manner and device for the same.