Access Point Scheduling Information Transmission for WLAN Resource Indication
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face inefficiencies in indicating time-frequency resources to stations, leading to suboptimal channel utilization and increased overhead in control information transmission.
Innovation Solution
The method involves an access point generating and transmitting scheduling information to stations without STA-specific HE-preamble or DL Data, allowing stations to send uplink subframes on specified sub-channels, enabling efficient resource indication and utilization within a 20 MHz bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional OFDMA resource allocation is used, then multiple STAs can simultaneously send and receive data, but the overhead in control information transmission increases and channel utilization is suboptimal
Solution Approach 1:
The patent segments the resource allocation process by separating control information transmission from data transmission. The AP transmits control information (scheduling information) on control channels, while data transmission occurs on data channels. This segmentation allows efficient resource indication to multiple STAs without increasing overall overhead, as control information is transmitted only once per resource allocation cycle rather than repeatedly with each data packet.
Solution Approach 2:
The patent applies preliminary action by having the AP transmit scheduling information before actual data transmission begins. The control information including resource allocation details is sent in advance to multiple STAs, allowing them to prepare for upcoming data transmission. This preliminary transmission of control information enables efficient resource indication without requiring repeated overhead transmission during data communication.
2Productivity
If scheduling information is transmitted to multiple STAs, then resource allocation efficiency improves, but the complexity of managing and transmitting control information increases
Solution Approach 1:
The patent implements universality by designing a control information transmission mechanism that serves multiple STAs simultaneously. The AP transmits scheduling information that can be decoded by multiple STAs, allowing a single control transmission to affect multiple users. This multi-functional approach improves resource indication efficiency while avoiding the complexity of separate control transmissions for each STA.
Solution Approach 2:
The patent uses control channels as intermediaries between the AP and multiple STAs. Instead of directly managing individual data transmissions for each STA, the control channels serve as a mediator that carries scheduling information to multiple STAs simultaneously. This intermediary mechanism simplifies control information management while maintaining efficient resource allocation to multiple users.
3Reliability
If STA-specific HE-preamble and DL Data are transmitted together with scheduling information, then communication reliability is ensured, but overhead increases and channel utilization decreases
Solution Approach 1:
The patent extracts and separates the scheduling information transmission from the data transmission components. Instead of transmitting STA-specific HE-preamble and DL Data together with scheduling information, the patent takes out the scheduling information and transmits it separately on control channels. This extraction maintains communication reliability through proper control signaling while eliminating redundant overhead that would otherwise reduce channel utilization.
Data Source
Figure 1A~1B
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AI summary
A resource indication processing method, which is applied to a wireless local area network that uses an OFDMA technology, where the method includes sending or receiving a frame including a resource indication field, where the resource indication field includes an identifier of a user, and resource block information and modulation and coding scheme MCS information that are corresponding to the identifier of the user.