Restricted TWT Scheduling via Beacon and Response Frames
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Solution Overview
Problem
Wireless LAN systems face challenges in supporting traffic sensitive to time delay, particularly in Wi-Fi environments where transmission speed is lower and interference is prevalent, making it difficult to maintain latency-sensitive communication.
Innovation Solution
The proposed solution involves transmitting restricted TWT scheduling information through beacon frames and alternative frames, ensuring higher success rates of receiving this information and protecting latency-sensitive traffic/data by securing the restricted TWT operation of STAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If restricted TWT scheduling information is transmitted only through beacon frames, then the transmission method is simple, but the success rate of receiving the information is low due to interference and transmission limitations in wireless environments
Solution Approach 1:
The patent introduces an alternative transmission path using non-beacon frames as an intermediary carrier for restricted TWT scheduling information. When beacon frame transmission fails or is not received, STAs can obtain the scheduling information through other frame types, thereby ensuring reliable delivery without significantly complicating the overall system architecture
Solution Approach 2:
The patent implements a mechanism where STAs proactively request restricted TWT scheduling information through non-beacon frames if they miss the beacon frame transmission. This preliminary action ensures that STAs can obtain necessary scheduling information before it becomes critical, improving the success rate of information reception
2Reliability
If multiple transmission paths are used for TWT scheduling information, then the success rate of receiving information increases, but the system complexity increases
Solution Approach 1:
The patent implements a dynamic transmission system where the choice of frame type for transmitting restricted TWT scheduling information is flexible and adaptive. The system can switch between beacon frames and non-beacon frames based on transmission conditions, ensuring reliable delivery while maintaining manageable system complexity through dynamic rather than static multi-path implementation
3Reliability
If restricted TWT operation is protected for all STAs, then latency-sensitive traffic is protected, but the device complexity and overhead increase
Solution Approach 1:
The patent applies protection mechanisms selectively rather than universally. Restricted TWT operation and its associated protection mechanisms are activated only for STAs that require latency-sensitive traffic protection, allowing the system to provide reliable protection where needed while avoiding unnecessary complexity for STAs that do not require such protection
Data Source
AI summary
The present specification proposes various methods for transmitting restricted TWT scheduling information. According to an embodiment of the present invention, the restricted TWT scheduling information can be transmitted through a beacon frame and another beacon frame other than the beacon frame. According to another embodiment described in the present specification, the restricted TWT scheduling information can be transmitted through a beacon frame and response information to request information transmitted by an STA that has not received the beacon frame.