Mine Emergency Relay Links With Interference-Aware Resource Scheduling
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Solution Overview
Problem
Existing coal mine emergency communication systems face co-frequency interference and inefficient routing processes, leading to poor communication quality and increased delay, which hampers rescue operations.
Innovation Solution
A system and method utilizing a management platform, repeaters, and terminals that employ a 5G direct communication and dedicated frequency bands to establish a transmission link, with a preset rule for resource allocation and scheduling to avoid co-frequency interference and reduce delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple devices relay forward transmission and return transmission in the same frequency band, then communication coverage is extended, but co-frequency interference occurs and communication quality deteriorates
Solution Approach 1:
The frequency band is segmented into different resources for forward transmission and return transmission. The repeater allocates different time slots, frequency resources, or code sequences for uplink and downlink communications, preventing co-frequency interference while maintaining extended coverage through multiple relaying devices.
Solution Approach 2:
The system employs periodic time-division multiplexing where forward and return transmissions occur in alternating time slots. This periodic allocation ensures that interfering signals do not overlap in time, allowing multiple devices to relay communications effectively without mutual interference.
2Adaptability or versatility
If a complicated routing process is maintained for transmission link establishment, then network flexibility is improved, but field debugging efficiency decreases and time delay increases
Solution Approach 1:
The repeater implements self-service through automatic routing establishment and resource allocation. When a transmission link is needed, the repeater autonomously selects appropriate relay devices and configures transmission parameters without requiring manual intervention, thereby maintaining network flexibility while dramatically improving field debugging efficiency.
Solution Approach 2:
The system performs preliminary actions by pre-configuring transmission templates and resource allocation schemes. Before actual emergency communication begins, the repeater pre-establishes routing policies and resource pools, enabling rapid link setup without complex real-time routing decisions, thus reducing time delay while preserving adaptability.
3Adaptability or versatility
If a complicated routing process is maintained for transmission link establishment, then network adaptability is improved, but additional time delay is introduced
Solution Approach 1:
The repeater performs preliminary actions by pre-configuring transmission templates and resource allocation schemes. Before actual emergency communication begins, the system pre-establishes routing policies and resource pools, enabling rapid link setup without complex real-time routing decisions, thus reducing time delay while preserving adaptability.
Solution Approach 2:
The repeater implements self-service through automatic routing establishment and resource allocation. When a transmission link is needed, the repeater autonomously selects appropriate relay devices and configures transmission parameters without requiring manual intervention or complex real-time processing, thereby maintaining network adaptability while dramatically reducing time delay.
4Device complexity
If resource allocation is not optimized in the transmission link, then system complexity is reduced, but communication efficiency deteriorates
Solution Approach 1:
The repeater autonomously performs resource allocation by selecting transmission resources from pre-configured pools based on simple rules such as least recently used or best signal quality. This self-service approach achieves efficient resource utilization without requiring complex centralized scheduling algorithms, thus improving communication efficiency while keeping system complexity manageable.
Data Source
AI summary
A system for mining mobile emergency communication includes: a management platform, a transmission network, a repeater and a terminal. The terminal is configured to collect and generate communication data, and to send the communication data to the repeater; the repeater is connected with the transmission network and/or connected with another repeater in a wireless way for building a transmission link, the transmission link transmitting the communication data sent by the terminal based on a preset rule; the management platform is configured to monitor and schedule the transmission link, and to schedule the communication data; and the transmission network is configured to connect the repeater and the management platform, and to transmit the communication data and link regulation and control data.