Peer-to-Peer Base Repeater Stations for Dynamic Rest Channel Management
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Solution Overview
Problem
Managing group communications across multiple decentralized trunked radio sites in a wide area network with dynamic rest channels is challenging due to the need for efficient channel assignment and redirection, which complicates group call setups and maintenance.
Innovation Solution
Implementing a peer-to-peer (P2P) network topology that allows direct communication between base repeater stations without a centralized controller, enabling dynamic rest channel sharing and redirection through intermediary base repeater stations with static IP addresses, and using firewalls and NATs to secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a centralized controller is used to manage channel assignment in a trunked radio system, then channel allocation can be controlled, but the system complexity and cost increase
Solution Approach 1:
The patent extracts the centralized controller function from the system architecture, allowing base repeater stations to independently perform channel assignment and management tasks that were previously handled by a central controller. This eliminates the need for dedicated control hardware while maintaining channel allocation capabilities.
Solution Approach 2:
Base repeater stations are empowered to autonomously manage their own channel assignments and rest channel selections without requiring external control. Each station independently makes decisions about channel allocation based on local conditions and network protocols.
2Ease of operation
If rest channel information is shared across all base repeater stations, then group call setup becomes simpler, but communication delay increases
Solution Approach 1:
The patent segments rest channel information sharing by allowing base repeater stations to share information only with geographically adjacent or logically connected stations rather than all stations in the network. This reduces the amount of information that needs to be transmitted and processed, thereby reducing delay while still enabling efficient group call setup.
Solution Approach 2:
Base repeater stations pre-establish rest channel assignments and maintain ready-to-use channel information before group calls are initiated. This preliminary preparation allows for faster group call setup without requiring real-time information exchange during the call initiation process.
3Productivity
If dynamic rest channel assignment is implemented, then channel utilization efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements dynamic rest channel assignment where base repeater stations can change their rest channel assignments based on current network conditions, traffic patterns, and interference levels. This dynamic adaptation improves channel utilization efficiency by allowing the system to respond to changing conditions without requiring complex centralized control.
Solution Approach 2:
The system changes operational parameters such as rest channel frequency and assignment based on detected conditions including interference levels, traffic load, and network topology. These parameter changes are made autonomously by base repeater stations using predefined protocols and thresholds.
Data Source
AI summary
A new group call request is received from a subscriber station at a rest channel repeater at a first network location. Corresponding new group call notifications are then transmitted to each of the other network locations over a wide area network to a current one of the repeaters acting as a rest channel repeater at each of the other network locations. Subsequently, an identity of a traffic channel repeater hosting the new call is received from each of the respective other network locations. An over-the-air notification is transmitted to other subscriber stations at the first network location identifying one of the first rest channel and another available channel as a channel for the new group call. Data received from the first subscriber station is then forwarded to each of the identified traffic channel repeaters at each of the other network locations via the wide area network.