Multi-Link Wireless LAN Low-Power Operation via PS-Poll
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless LAN technologies lack efficient methods for low-power operation in multi-link environments, particularly in supporting high-throughput and real-time data transmission, as they do not define detailed operations for multi-link operations and low-power data transmission/reception methods.
Innovation Solution
A method and apparatus for transitioning between sleep and awake states in multi-link wireless LAN systems, where a device receives a beacon frame to identify data frames across multiple links, sends PS-Poll frames to request data transmission, and performs data transmission/reception after receiving a Poll response frame, including information on link availability and status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device operates in awake state continuously to receive and transmit data in multi-link environment, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The device dynamically transitions between awake and sleep states based on data transmission requirements. The device operates in awake state only when data needs to be transmitted or received, and switches to sleep state when no data transmission is required, thereby reducing power consumption while maintaining transmission reliability.
Solution Approach 2:
The device employs periodic beacon frame reception to wake up from sleep state and check for pending data. By using periodic wake-up intervals synchronized with beacon frames, the device ensures it can reliably receive data while minimizing the duration of high-power operation.
2Use of energy by moving object
If a device transitions to sleep state to reduce power consumption in multi-link environment, then power saving is improved, but data transmission latency increases
Solution Approach 1:
The device sends PS-Poll frames in advance to indicate its wake-up and readiness for data reception. This preliminary action allows the transmitting device to prepare and send data immediately when the receiving device wakes up, minimizing latency while maintaining power savings.
Solution Approach 2:
The device uses PS-Poll frames as feedback to the transmitting device, informing it that the receiver is awake and ready for data transmission. This feedback mechanism ensures that data can be transmitted immediately upon wake-up, reducing the latency penalty associated with sleep operations.
3Reliability
If multiple PS-Poll frames are transmitted across multiple links to request data, then data reception completeness is improved, but communication overhead increases
Solution Approach 1:
The device segments data reception requests across multiple links by transmitting separate PS-Poll frames on each link where data may be present. This segmentation ensures that data on any link can be requested independently, improving reception completeness while managing overhead through targeted requests.
Solution Approach 2:
The PS-Poll frame mechanism is designed to be universal across multiple links, with the same frame type used on each link regardless of the specific data content. This multi-functionality allows the device to request data on any number of links using a standardized approach, reducing the complexity of implementing link-specific protocols.
Data Source
AI summary
A method and a device are disclosed for low-power operation-based communication in a communication system supporting a multi-link. An operation method of a first device comprises the steps of: transitioning the operating state of a first device from a sleep state to an awake state in a first link of a multi-link; receiving a beacon frame from a second device in the first link; transmitting a first PS-Poll frame to the second device in the first link if the beacon frame indicates that a data frame to be transmitted is present in the first link; and performing a transmission/reception operation for a data frame with the second device in the first link after transmitting the first PS-Poll frame.