Client Device Grouping for Uplink MU Transmission in WLAN
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Solution Overview
Problem
Current WLAN networks face challenges in grouping client devices for simultaneous uplink MU transmissions and determining optimal MCS and target RSSI in the 802.11ax standard, as existing methods lack mechanisms for accurately calculating uplink pathloss and efficiently managing client device compatibility.
Innovation Solution
The solution involves grouping client devices based on traffic compatibility, device class, and pathloss similarity, with calculations of uplink pathloss using maximum transmit power capabilities and power headroom values to determine suitable MCS and target RSSI for efficient MU-MIMO and OFDMA operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If client devices are grouped for simultaneous uplink MU transmissions, then network throughput and efficiency are improved, but determining optimal MCS and target RSSI becomes more complex due to lack of accurate uplink pathloss calculation mechanisms
Solution Approach 1:
The patent introduces pathloss as an intermediary parameter that mediates between transmit power and received signal strength. By calculating pathloss based on maximum transmit power capabilities and power headroom values, the system creates a bridge that enables accurate MCS and target RSSI determination for grouped client devices, resolving the complexity issue while maintaining high throughput.
Solution Approach 2:
The patent changes the parameter set used for uplink transmission optimization by introducing maximum transmit power capabilities and power headroom values as new parameters. These parameter changes enable more accurate pathloss calculation, which in turn facilitates better MCS and target RSSI determination for MU transmissions, improving throughput without excessive complexity.
2Quantity of substance
If client devices with different pathloss characteristics are grouped together, then more devices can be included in MU transmissions, but data packet reception success rates decrease
Solution Approach 1:
The patent applies local quality by determining pathloss-specific parameters for each client device within the MU group. Instead of using uniform parameters for all devices, the system calculates individual pathloss values based on each device's maximum transmit power capabilities and power headroom, enabling optimized MCS and target RSSI settings tailored to each device's local channel conditions, thus maintaining high reception success rates while including diverse devices.
Solution Approach 2:
The patent performs preliminary pathloss calculation and parameter optimization before the actual MU transmission occurs. By pre-determining the pathloss characteristics and optimizing MCS and target RSSI parameters for each device in advance, the system ensures that when the MU transmission executes, all devices are properly configured for their specific channel conditions, guaranteeing high reception success rates.
3Reliability
If individual parameter optimization is performed for each client device, then reception success rates are improved, but the complexity and time for parameter determination increases
Solution Approach 1:
The patent performs pathloss calculation and parameter optimization in advance, before the actual data transmission. By determining maximum transmit power capabilities, power headroom values, and derived pathloss parameters beforehand, the system prepares all necessary parameters ahead of time, ensuring high reception success rates without adding significant time to the transmission process itself.
Data Source
AI summary
Systems and methods for grouping client devices for uplink multi-user transmission are provided. Client device groups may be determined based on at least one of traffic compatibility/similarity, client device class compatibility/similarity, and uplink pathloss similarity. A target received signal strength measured by an AP with which client devices in the client device groups communicate and an appropriate modulation coding scheme rate to be used by the client devices may be determined and set for the client devices. The modulation coding scheme rate can be adjusted based on feedback regarding successful data packet reception at the AP from each of the client devices.