Multi-Link Wakeup Control for Reliable Low-Power Wireless Access
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Solution Overview
Problem
Existing wireless communication systems face challenges with unreliable transmissions, high access delay, and inefficient medium utilization due to interference and the limitations of single-link associations, particularly in license-exempt or shared frequency bands, leading to increased latency and reduced throughput.
Innovation Solution
Implementing multi-link communication mechanisms that utilize multiple wireless links between a wireless station and access points, allowing transition between active and power saving states through link wakeup indications and notifications, enabling efficient data transmission and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wireless links are used for data transmission, then transmission reliability and throughput are improved, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the wireless communication system into multiple independent links between the access point and station. Each link can be independently activated or deactivated, allowing the system to divide the transmission task across multiple paths. This segmentation improves reliability by providing alternative transmission paths while managing complexity through modular link management.
Solution Approach 2:
The patent implements dynamic link management where links can transition between active and power-saving states based on traffic requirements. The access point can activate or deactivate specific links dynamically, allowing the system to adapt to changing conditions. This dynamic approach maintains reliability when needed while reducing complexity and power consumption during low-traffic periods.
2Productivity
If multiple wireless links are maintained in active state, then transmission throughput increases, but power consumption increases
Solution Approach 1:
The patent implements periodic activation of links based on traffic patterns. Instead of keeping all links continuously active, the system periodically activates links when data transmission is required and deactivates them during idle periods. This periodic action maintains high throughput capability when needed while significantly reducing power consumption during low-activity periods.
Solution Approach 2:
The patent changes the operational state parameter of wireless links between active and power-saving modes. By controlling the state parameter of each link dynamically, the system can optimize the balance between throughput and power consumption. When high throughput is required, links are switched to active state; when power saving is prioritized, links are switched to power-saving state.
3Use of energy by moving object
If links transition between active and power saving states, then power consumption is optimized, but access delay increases
Solution Approach 1:
The patent applies preliminary action by maintaining certain links in an active state in anticipation of future data transmission needs. Rather than activating links only when absolutely necessary, the system proactively keeps links active based on predicted traffic patterns or priority requirements. This preliminary action reduces access delay for time-sensitive data while still allowing power-saving modes for less critical transmissions.
Solution Approach 2:
The patent implements feedback mechanisms where the access point monitors link conditions, traffic patterns, and power consumption levels. Based on this feedback, the system dynamically adjusts link activation decisions. When feedback indicates time-sensitive traffic or poor link quality, the system activates links more aggressively to minimize delay. When feedback shows stable conditions and low traffic, the system can afford to save power by deactivating links.
Data Source
AI summary
Methods, systems, and devices related to related to digital wireless communication, and more specifically, to techniques related to the power saving mechanism for multi-link operation. In one exemplary aspect, a method for wireless communication includes transmitting a link wakeup indication message to a wireless device over a first link of multiple links between the network node and the wireless device. The link wakeup indication message may indicate a request to transition at least one link of the multiple links between an active state and a power saving state. The method may also include, responsive to transmitting the link wakeup indication message, obtaining, by the network node, a link wakeup notification message from the wireless device indicating that at least one link of the multiple links has transitioned between the active state and the power saving state.