WiMAX Mobile Station Sleep Mode Scheduling
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Solution Overview
Problem
In WiMAX networks, mobile stations often waste power due to being in an active mode during frames where they do not participate in data transmission, as the minimum unit for entering sleep mode is a frame, leading to high power consumption and reduced operation time.
Innovation Solution
A wireless network scheduling control system and method that reorganizes data transmission within frames by adjusting the MAP, allowing end receiving/transmitting nodes to enter sleep mode during non-participating periods by registering and accumulating data until a critical value is reached, thereby reducing idle time in active mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile stations remain in active mode during entire frame transmission to ensure data reception capability, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The frame transmission time is segmented into multiple sub-frames or time slots. The mobile station wakes up at specific intervals to check for data and can enter sleep mode during non-critical periods, rather than remaining active throughout the entire frame transmission cycle.
Solution Approach 2:
The mobile station adopts periodic wake-up patterns instead of continuous active mode. It wakes up at predetermined intervals to check for data and enters sleep mode between wake-ups, creating a periodic active-sleep cycle that reduces overall power consumption while maintaining data reception capability.
2Use of energy by moving object
If mobile stations enter sleep mode at frame boundaries to save power, then power consumption is reduced, but the minimum unit constraint limits further power saving opportunities
Solution Approach 1:
The base station performs preliminary actions by buffering data and preparing optimized wake-up schedules before mobile stations enter sleep mode. It anticipates data arrival patterns and configures wake-up times in advance, allowing mobile stations to sleep longer while ensuring data is ready when they wake up.
Solution Approach 2:
The system implements feedback mechanisms where mobile stations report their sleep patterns and data reception status to the base station. The base station uses this feedback to dynamically adjust wake-up schedules and frame structures, optimizing the balance between power saving and data delivery while managing scheduling complexity.
3Productivity
If data is transmitted continuously in every frame to maintain transmission efficiency, then transmission efficiency is improved, but mobile stations cannot enter sleep mode during idle periods
Solution Approach 1:
Instead of transmitting data in every frame, the system uses partial action by transmitting data only in frames when it is actually available. This allows mobile stations to skip wake-ups during frames without data, reducing power consumption while maintaining transmission efficiency when data is present.
Solution Approach 2:
The transmission schedule becomes dynamic rather than static. The base station adapts the frame structure and data transmission timing based on actual data availability and mobile station sleep patterns, allowing the system to optimize both transmission efficiency and power consumption in real-time.
Data Source
AI summary
A wireless network scheduling control system and a method therefor are provided, which includes a first receiving/transmitting node, one or a plurality of second receiving/transmitting nodes, and an end receiving/transmitting node. When data is transmitted from the first receiving/transmitting node to the end receiving/transmitting node via the second receiving/transmitting node, a type of the transmitted data for being connected is determined. If a transmission sequence can be registered and reset, the end receiving/transmitting node enters a sleeping mode through a control signal, and the second receiving/transmitting node registers and resets the transmission sequence; otherwise, the transmission is performed according to a plan of an MAP. A technology of registering and reorganizing the data in a frame structure that is transmitted is utilized, such that the data relevant to the end receiving/transmitting node is received and transmitted as collectively as possible.