Wireless Station UL OFDMA Request via Control Field Subfields
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Solution Overview
Problem
In high-density wireless environments, existing IEEE 802.11 standards face challenges in efficiently managing uplink (UL) communication due to collisions and high traffic latency, where access points (APs) do not automatically provide UL Orthogonal Frequency Division Multiple Access (OFDMA) when channel conditions deteriorate.
Innovation Solution
A wireless communication method that sets specific subfields in a report frame to request UL OFDMA from an access point, using reserved bits in the MAC control field, QoS control field, or HT control field to indicate the preference and reasons for using UL OFDMA, allowing stations to proactively request improved communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing IEEE 802.11 standards are used for uplink communication, then device compatibility is maintained, but collisions and traffic latency increase in high-density environments
Solution Approach 1:
The patent changes the communication protocol parameters by introducing UL OFDMA as an alternative to traditional uplink access methods. Stations set specific subfields in control fields of report frames to request UL OFDMA, and APs allocate resource units differently based on these requests, transforming the communication mode from collision-based to structured multiple access
Solution Approach 2:
The patent implements dynamic protocol adaptation where the AP and stations can switch between traditional uplink communication and UL OFDMA based on channel conditions and station requests. The system dynamically adjusts resource allocation and access methods rather than using a fixed protocol, allowing optimization for high-density scenarios while maintaining compatibility with existing standards
2Object-generated harmful factors
If UL OFDMA is automatically provided by APs, then collision is reduced, but system complexity increases
Solution Approach 1:
The patent enables stations to self-manage their communication mode by autonomously determining when UL OFDMA is needed and setting the appropriate request indicators in their report frames. This shifts part of the decision-making burden from the AP to the stations, reducing AP complexity while still achieving collision reduction through structured resource allocation
3Device complexity
If stations use traditional uplink access methods, then protocol simplicity is maintained, but traffic latency increases in dense environments
Solution Approach 1:
The patent implements preliminary action by having stations proactively set request indicators in their report frames before data transmission, allowing the AP to pre-allocate resource units and prepare UL OFDMA resources in advance. This advance preparation reduces waiting time and traffic latency while maintaining relatively simple protocol structures
Data Source
AI summary
A wireless communication method includes setting at least one specific subfield of a control field in a report frame, and transmitting the report frame to an access point for communicating with the access point on uplink (UL) Orthogonal Frequency-Division Multiple Access (OFDMA). In addition, the wireless communication method is performed by a program code loaded from a storage device of a wireless communication device and executed by a processor of the wireless communication device.