End of Data Indication for Power Save Mode Management
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Solution Overview
Problem
Existing wireless communication devices face challenges in determining when to resume normal operation from power save mode and efficiently managing data retrieval from access points, leading to inefficiencies in power consumption and network throughput.
Innovation Solution
Implementing methods that include transmitting power save polling frames, fetch trigger frames, and end of data indication frames to manage the transition between power save and active states, allowing devices to sleep during defined fetch times and reducing re-fetching of buffered data packets, thereby optimizing power usage and network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a station enters power save mode to conserve energy, then power consumption is reduced, but the station cannot determine when to resume normal operation or when buffered data is ready for retrieval
Solution Approach 1:
The access point performs preliminary actions by buffering data packets and maintaining them ready for retrieval before the station wakes up. The system pre-processes and holds data in the access point's buffer, so when the station resumes operation, data is immediately available without requiring the station to actively fetch or re-request it.
Solution Approach 2:
The system implements feedback mechanisms where the access point monitors buffered data status and can notify the station when data is available. The station receives feedback about buffer status, allowing it to intelligently decide when to wake up and retrieve data, optimizing both power consumption and data retrieval timing.
2Reliability
If the station frequently wakes up to check for buffered data, then data retrieval reliability is improved, but power consumption increases
Solution Approach 1:
Instead of frequent or continuous checking, the station implements periodic wake-up cycles at predetermined intervals. This rhythmic, scheduled approach to data checking maintains reliability by ensuring data is retrieved at appropriate intervals while significantly reducing power consumption compared to continuous or frequent polling.
Solution Approach 2:
The access point provides self-service by automatically managing buffered data and making it available for retrieval. The system serves itself by maintaining data readiness without requiring the station to actively manage or continuously query the buffer status, reducing the station's power consumption while ensuring data availability.
3Speed
If the station remains in active state to ensure immediate data access, then data access speed is improved, but power consumption increases
Solution Approach 1:
The access point performs preliminary data preparation and buffering actions before the station needs the data. By pre-positioning data in the buffer and maintaining it ready, the system ensures fast data access when the station wakes up without requiring the station to remain continuously active, thus achieving speed without continuous power consumption.
4Reliability
If the access point transmits all buffered data immediately when the station wakes up, then data delivery completeness is improved, but network throughput decreases due to repeated fetch operations
Solution Approach 1:
The access point performs preliminary data buffering and organization before the station wakes up. Data is pre-collected and held in the buffer in readiness, so when the station retrieves data, it can receive multiple packets in a single operation rather than requiring repeated fetch cycles, improving both completeness and throughput.
Data Source
AI summary
A particular method includes receiving a first frame from a station at an access point indicating that the station is to enter a power save mode. The method also includes transmitting one or more data frames from the access point to the station. The one or more data frames were buffered for transmission prior to receipt of the first frame. The method further includes transmitting an end of data frame to the station. Another particular method includes transmitting a first frame from the station to the access point indicating that the station is to enter the power save mode. The method also includes refraining from entering the power save mode until an end of data frame is received from the access point.