Resource Unit Selective Transmission for Low Latency Wireless Networks
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Solution Overview
Problem
Current wireless networking standards face challenges in achieving low latency transmission due to long transmission opportunities (TXOP) that prevent simultaneous data transmission by other stations, leading to performance degradation in environments with multiple access points and stations.
Innovation Solution
The resource unit selective transmission (RUST) scheme, which encodes data using error-correcting encoding, generates sub-blocks, and assigns them to resource unit groups based on channel gains, allowing for simultaneous transmission of low latency data frames during ongoing RUST data frame transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a station acquires a transmission opportunity (TXOP), then the safe transmission of the TXOP owner's frames is guaranteed, but other STAs are not allowed to transmit during the TXOP, preventing low latency transmission
Solution Approach 1:
The patent segments the TXOP into multiple resource unit groups (RU-sets), allowing different portions of the transmission opportunity to be used for different purposes. The first RU-set is dedicated to RUST frame transmission while the second RU-set allows low latency frame transmission, enabling simultaneous operations within the same TXOP without compromising frame safety.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by dividing the TXOP into multiple RU-sets that can operate independently. This allows the system to transmit RUST frames and low latency frames simultaneously in different resource dimensions, resolving the time-latency issue while maintaining transmission reliability.
2Reliability
If TXOPs last for a relatively long time, then the safe transmission of frames is ensured, but low latency transmission is prevented in the wireless network
Solution Approach 1:
The TXOP is segmented into multiple RU-sets with different time durations and transmission characteristics. The first RU-set handles RUST frame transmission with longer duration for reliability, while the second RU-set enables low latency transmission with shorter duration, achieving both safety and speed requirements simultaneously.
Solution Approach 2:
Different RU-sets within the same TXOP have different local qualities - the first RU-set is optimized for reliable RUST frame transmission while the second RU-set is optimized for low latency performance. This local differentiation allows each portion to serve its specific purpose without compromising the other.
3Productivity
If multiple STAs transmit simultaneously in diverse environments with many APs, then network productivity increases, but interference from neighboring devices causes performance degradation
Solution Approach 1:
The patent segments the transmission spectrum into multiple RU-sets that can be allocated to different STAs independently. This segmentation allows multiple STAs to transmit simultaneously in different RU-sets without interfering with each other, increasing network productivity while managing interference through structured resource allocation.
Solution Approach 2:
The patent introduces RU-sets as intermediary resource units that mediate between multiple STAs and the shared medium. These intermediary structures enable simultaneous transmissions from multiple STAs while isolating their signals to prevent harmful interference, thus improving overall network productivity in diverse environments.
Data Source
AI summary
Disclosed herein is a method performed by a wireless device in a wireless network to transmit data using a resource unit selective transmission (RUST) transmission scheme. The method includes encoding source data using an error correcting encoding to generate encoded bits, generating a plurality of sub-blocks based on the encoded bits, determining an assignment of the plurality of sub-blocks to a plurality of resource unit groups, and wirelessly transmitting the plurality of sub-blocks in the plurality of resource unit groups according to the assignment of the plurality of sub-blocks to the plurality of resource unit groups.