Distributed Trunking Repeater Control via Broadcast Monitoring

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Solution Overview

Problem

Centralized trunking communication systems face high construction and maintenance costs due to dedicated control channels, while distributed systems struggle with channel resource allocation and sharing, leading to potential access failures from collisions when multiple mobile stations access shared channels.

Innovation Solution

A communication method where mobile stations monitor broadcast information from repeaters to determine their states and perform handovers to access calls, using broadcast information to identify idle or busy repeaters and switch accordingly, ensuring timely and reliable call access without dedicated control channels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If centralized trunking communication systems use dedicated control channels for channel resource management, then channel resource allocation efficiency is improved, but construction and maintenance costs increase significantly

Engineering Contradiction:

Improvechannel resource allocation efficiencyVSAvoidconstruction and maintenance cost

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts the control channel function from the traditional centralized control center and distributes it to individual repeaters. Each repeater independently performs control channel functions such as call setup, channel allocation, and mobile station management, eliminating the need for dedicated control channels and high-cost centralized infrastructure while maintaining efficient resource allocation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The centralized control function is segmented and distributed across multiple repeaters. Instead of one central controller, each repeater becomes an independent control node that can autonomously manage calls and channel resources within its coverage area, reducing system complexity and cost while preserving allocation efficiency.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If distributed trunking communication systems eliminate dedicated control channels to reduce costs, then construction and maintenance costs decrease, but channel resource allocation and sharing become problematic

Engineering Contradiction:

Improveconstruction and maintenance costVSAvoidchannel resource allocation efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

Each repeater in the distributed system performs self-service by autonomously executing control channel functions without relying on a centralized controller. Repeaters independently handle call setup, channel assignment, and resource management, enabling cost-effective distributed architecture while maintaining efficient channel allocation through local intelligence.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system pre-configures multiple repeaters with identical control capabilities before deployment. This preliminary preparation ensures that when the system operates in distributed mode, each repeater can immediately perform control functions without needing centralized coordination, solving the resource allocation problem while keeping costs low.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If multiple mobile stations simultaneously access shared channels in distributed systems, then channel sharing capability is improved, but access failures occur due to collisions

Engineering Contradiction:

Improvechannel sharing capabilityVSAvoidaccess success rate

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where repeaters continuously monitor channel access status and provide real-time information to mobile stations. When collisions are detected or channels become unavailable, repeaters send feedback signals to coordinate access timing and select alternative channels, enabling multiple mobile stations to share channels reliably without access failures.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3125585B1Mobile station, repeater and methods for trunking communication

Publication Date: 2019.09.25 HYTERA COMM CORP

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AI summary

Disclosed are a mobile station, a repeater, a trunking communication system and a method thereof. The method comprises: monitoring broadcast information sent by a repeater where the mobile station currently resides, the broadcast information carrying status information of repeaters in a site and call related information, and the site being a site to which a master repeater of the mobile station belongs; acquiring the status of the master repeater according to the broadcast information, when the master repeater is idle, the repeater where the mobile station currently resides is the master repeater, when the master repeater is busy, the repeater where the mobile station currently resides is a free repeater, is the free repeater being a preset repeater of which the status is idle in the site; determining whether there is a call belonging to the mobile station according to the call related information; and when determining that there is a call belonging to the mobile station, performing handover, according to the call related information, to a repeater corresponding to the call belonging to the mobile station to connect the call.