Wireless Terminal State-Based Channel Scheduling
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Solution Overview
Problem
Legacy wireless LAN systems, particularly those using IEEE 802.11 MAC, face challenges in providing quality of service (QoS) due to their inability to prioritize data traffic and manage congestion effectively, leading to delayed transmission of time-constrained frames and inefficient resource allocation.
Innovation Solution
A wireless communication system that utilizes terminal state information, such as battery capacity, CPU load, and temperature, to dynamically adjust data transmission modes and schedules, ensuring optimal QoS by setting shorter service intervals and higher data transmission rates as terminal conditions improve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PCF with round-robin scheduling is used, then real-time traffic services are supported, but QoS cannot be differentiated and transmission delays occur
Solution Approach 1:
The patent applies dynamics by transitioning from static round-robin scheduling to dynamic scheduling based on terminal state information. The base station continuously monitors terminal states (battery level, CPU load, temperature) and adjusts scheduling decisions in real-time, allowing the system to adapt to changing conditions and prioritize time-sensitive traffic appropriately.
Solution Approach 2:
The patent changes the scheduling parameter from fixed round-robin order to variable priority based on terminal state parameters. By incorporating terminal state information (battery level, CPU load, temperature) as scheduling parameters, the system can dynamically adjust transmission priorities to minimize delays for time-sensitive traffic while considering terminal capabilities.
2Ease of operation
If DCF method is used, then basic medium access is provided, but no QoS support and all data traffics are serviced in best effort mode
Solution Approach 1:
The patent merges DCF's simplicity with PCF's QoS capabilities by using DCF for basic medium access while incorporating terminal state-based scheduling to provide QoS differentiation. This combination maintains the ease of operation of DCF while adding the reliability of QoS support through intelligent scheduling decisions.
Solution Approach 2:
The patent introduces terminal state information as an intermediary between the medium access mechanism and the scheduling decision. This intermediary layer allows the system to translate basic DCF access into QoS-aware scheduling by considering terminal conditions, thereby bridging the gap between simple access and reliable service differentiation.
3Adaptability or versatility
If beacon frame transmission is delayed, then medium access flexibility is maintained, but time-constraint frame transmission is delayed and QoS is seriously influenced
Solution Approach 1:
The patent applies preliminary action by having the base station prepare and schedule beacon frame transmissions in advance based on predicted terminal states and traffic requirements. By proactively planning beacon transmissions before delays occur, the system ensures that time-constraint frames can be transmitted within their required time windows while maintaining medium access flexibility.
4Reliability
If terminal state information is collected and used for scheduling, then optimal QoS is achieved, but system complexity increases
Solution Approach 1:
The patent applies self-service by having terminals autonomously monitor and report their own state information (battery level, CPU load, temperature) to the base station. This eliminates the need for complex monitoring infrastructure at the base station, as terminals serve themselves by providing the necessary scheduling information, thereby reducing overall system complexity while maintaining QoS optimization.
Data Source
AI summary
The present invention relates to a method of setting a traffic stream of a wireless communication considering terminal state information. The present invention provides a wireless communication system, comprising a base station for controlling a wireless communication and a terminal device connected to the base station to transmit and receive data, wherein the terminal device transmits terminal state information representing a state thereof to the base station and the base station sets data transmission mode using the received terminal state information. According to the present invention, there is an advantage in that a traffic stream can be maintained considering a state of the terminal, and thus, power consumption of the terminal can be minimized.