Relay Device Power Mode Management for WLAN Buffer Overflow
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Solution Overview
Problem
The efficiency of wireless local area network (WLAN) systems deteriorates as the distance between devices increases, leading to reduced communication efficiency and increased power consumption due to the need for low data rates and prolonged terminal awakenings.
Innovation Solution
A data transmission method utilizing a relay device that generates suspend and resume request frames to manage power modes, allowing the relay device to operate in doze or awake modes based on buffer availability and data transmission needs, thereby optimizing data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the distance between WLAN devices increases, then coverage area is extended, but communication efficiency deteriorates
Solution Approach 1:
A relay device is introduced as an intermediary between the access point and end terminals. The relay device receives data from the access point and forwards it to end terminals, enabling extended coverage while maintaining communication efficiency through intermediate data transmission hops
2Reliability
If data transmission rate is reduced for long distance communication, then transmission reliability improves, but power consumption increases due to prolonged terminal awakenings
Solution Approach 1:
The relay device acts as an intermediary that maintains closer proximity to end terminals than the access point. This enables the use of higher data rates for relay-to-terminal transmission while the terminal can quickly enter doze mode after receiving data, reducing overall power consumption
Solution Approach 2:
The relay device performs preliminary data reception from the access point before forwarding to end terminals. This allows terminals to receive data quickly and return to doze mode sooner, reducing the time terminals need to remain awake and thereby reducing power consumption
3Speed
If the relay device operates continuously in awake mode, then data transmission responsiveness improves, but power consumption increases
Solution Approach 1:
The relay device dynamically switches between awake and doze modes based on data transmission requirements. The relay device operates in awake mode when data needs to be transmitted and enters doze mode when no data transmission is required, optimizing the balance between responsiveness and power consumption
Solution Approach 2:
The relay device periodically transitions between awake and doze modes according to data buffer status and transmission needs. This periodic operation pattern allows the relay device to maintain data transmission capability while reducing power consumption during idle periods
Data Source
AI summary
Disclosed are a method and an apparatus for transmitting data in a wireless LAN system. The method for transmitting data comprises the steps of: generating a discontinuation request frame for requesting discontinuation of transmitting a data frame from a master-access point to a relay device; and transmitting the discontinuation request frame to the master-access point. As a result, the occurrence of a buffer overflow in the relay device can be prevented.