Wireless Controller Scheduling to Prevent Signal Collisions
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Solution Overview
Problem
Current communication systems face challenges in controlling traffic flows and ensuring quality of service when main signals and control signals coexist in the same wireless network, leading to potential collisions and failure in scheduling and notification processes.
Innovation Solution
A controller that gathers information from terminals and access points, calculates a transmission schedule for main signals while avoiding periodic control signal transmission timings, using the same frequency band for both signals, and imposes restrictions to prevent packet overflow and collisions, ensuring quality control for each service or application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If main signals and control signals are transmitted in the same wireless network, then device complexity is reduced and ease of operation is improved, but signal collisions occur and reliability deteriorates
Solution Approach 1:
The patent segments the transmission timeline into distinct time slots: control signal transmission periods and main signal transmission periods. The scheduler divides the communication cycle such that control signals are transmitted during designated control periods, and main signals are transmitted during designated data periods, preventing overlapping and collisions while using the same wireless network.
Solution Approach 2:
The patent implements periodic transmission of control signals at fixed intervals, with each control signal transmission occupying a specific periodic time slot. The scheduler is configured with a control signal transmission period that regularizes when control signals are sent, ensuring that main signals do not transmit during these periodic control intervals, thus avoiding collisions.
2Manufacturing precision
If quality control is implemented on service and application basis, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal scheduler that handles multiple traffic flows with different quality requirements through a single control mechanism. The scheduler receives quality control parameters for various services and applications and applies them uniformly through the same time slot allocation process, enabling multi-service quality control without requiring separate complex control systems for each service.
Solution Approach 2:
The patent controls quality of service by dynamically adjusting transmission parameters such as time slot allocation, transmission power, and data rates for different traffic flows. The scheduler modifies these parameters based on quality requirements specified for each service and application, enabling precise quality control through parameter optimization rather than structural complexity.
Data Source
AI summary
To solve the above problem, the present invention aims to provide a controller, a communication system, a control method, and a program capable of performing transmission scheduling to avoid mutual interference in a plurality of wireless networks.A controller 13 according to the present invention includes a scheduler SCH3 that calculates a transmission schedule for packets to be transmitted from buffers (FB1, FB2) on the basis of the amount of packets stored in a database DB in each predetermined period, and, when calculating the transmission schedule, imposes a restriction to prevent a total amount of packets to be transmitted from all the buffers (FB1, FB2) included in a network NW #j from exceeding the product of the throughput of each network NW #j and the predetermined period.