Wireless Relay Channel Allocation for Collision Reduction
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Solution Overview
Problem
In wireless communication systems, when multiple wireless terminal devices attempt to communicate via the same channel simultaneously, collisions occur, leading to high probability of communication failure due to concentrated transmissions, especially in systems like those for delivery and taxi companies where many devices try to connect at the same time.
Innovation Solution
A wireless communication system where multiple relay devices are connected via a communication line, each allocated unique relaying channels, and terminal devices select idle channels based on control information from their registered relay device, using predetermined rules to distribute communication across available channels, thereby reducing channel concentration and collision probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple wireless terminal devices use the same channel for communication simultaneously, then communication simplicity is maintained, but collision probability increases significantly
Solution Approach 1:
The patent segments the communication channels by introducing multiple relay devices, each managing its own dedicated channel. This divides the single-channel communication system into multiple parallel channels, allowing terminal devices to select from different channels and thereby reducing collision probability while maintaining operational simplicity through automated channel selection.
Solution Approach 2:
The relay device acts as an intermediary between terminal devices and the communication channel. It manages channel allocation and selection, mediating the communication process to distribute traffic across multiple channels. This intermediary approach enables terminal devices to communicate without directly managing channel conflicts, maintaining ease of operation while reducing collisions.
2Device complexity
If a single channel is used for all communications, then device complexity is reduced, but channel congestion occurs during peak usage periods
Solution Approach 1:
The communication system is segmented into multiple channels managed by different relay devices. This segmentation allows the system to handle peak usage periods by distributing traffic across multiple parallel channels, thereby maintaining high productivity without significantly increasing the complexity at individual terminal devices, as channel selection is automated by relay devices.
Solution Approach 2:
The patent introduces a new dimension to channel management by utilizing multiple relay devices as additional resources. Instead of managing channel congestion through complex protocols on a single channel, the system adds the dimension of relay device selection, allowing terminal devices to choose from multiple relay-channel combinations, thereby improving throughput without overwhelming individual devices with management complexity.
3Productivity
If relay devices are added to the system, then channel distribution improves, but system complexity increases
Solution Approach 1:
The relay devices autonomously manage channel allocation and selection without requiring complex centralized control. Each relay device independently monitors channel status and communicates availability to terminal devices, allowing the system to improve channel utilization efficiency while keeping individual relay device complexity manageable through self-service operations.
Solution Approach 2:
The system implements feedback mechanisms where relay devices transmit channel status information to terminal devices. This feedback allows terminal devices to make informed channel selection decisions, improving overall channel utilization efficiency. The feedback mechanism is designed to be lightweight, adding minimal complexity to relay devices while significantly improving system productivity.
Data Source
AI summary
Wireless terminal devices (TA) to (TH) each detects whether channel information received from each of repeaters (1111) to (111n) indicates an occupied state or an idle state, and when detecting a channel in an idle state, writes identification information of that channel in a RAM (23). The wireless terminal devices (TA) to (TH) each selects a piece of identification information of a channel among plural pieces of identification information of a channel written in the RAM (23) to start making a call to a channel of the selected identification information.