Base Station Channel Scanning Coordination
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Solution Overview
Problem
Conventional non-trunked radio communication systems face challenges in coordinating channel scanning among multiple base stations, leading to inefficient handling of simultaneous calls and potential interference, especially when two or more wireless communication devices attempt to transmit simultaneously within range of the same base station.
Innovation Solution
The system implements a method where base stations communicate via a link to coordinate channel scanning, with a first base station indicating channel usage to other stations, causing them to temporarily suspend scanning of that channel, and redistribute scanning responsibilities among base stations to ensure all channels are monitored without conflict, allowing for efficient handling of multiple calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple base stations regularly scan all available channels independently, then channel monitoring coverage is improved, but destructive interference and redundant scanning occur
Solution Approach 1:
The patent merges the scanning operations of multiple base stations by having them coordinate through inter-base station communication. When one base station detects a call on a channel, it informs other base stations, which then suspend scanning on that channel to avoid interference while maintaining overall monitoring coverage.
Solution Approach 2:
The patent introduces an intermediary communication mechanism between base stations where detection information is shared. This intermediary system allows base stations to coordinate their scanning activities, preventing destructive interference by having stations suspend scanning when others are actively monitoring a channel.
2Productivity
If channels are allocated equally among base stations, then system capacity is improved, but calls in unassigned channel sets are missed
Solution Approach 1:
The patent implements dynamic channel assignment where base stations can temporarily assume responsibility for channels outside their primary allocation. When a base station completes its assigned channels without detecting calls, it can dynamically take over scanning of other channels, creating a flexible system that adapts to actual call patterns.
Solution Approach 2:
The patent enables base stations to self-adjust their scanning responsibilities based on system conditions. When one base station is busy handling a call, other base stations automatically adjust their scanning patterns to cover the busy station's channels, allowing the system to self-regulate without external control.
3Use of energy by moving object
If a base station stops scanning after detecting a call, then scanning resources are improved, but simultaneous calls on other channels are missed
Solution Approach 1:
The patent makes base stations universal by enabling them to perform multiple functions: scanning their assigned channels and temporarily assuming responsibility for other channels. This multi-functionality allows the system to handle simultaneous calls across different channel sets without requiring each station to continuously scan all channels.
Solution Approach 2:
The patent implements feedback mechanisms where base stations share detection information with each other. When one base station detects a call and stops scanning, the feedback system informs other base stations to take over those channels, ensuring continuous monitoring while conserving scanning resources.
Data Source
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AI summary
Methods, systems and apparatus are provided for coordinating channel scanning between a plurality of base stations that are part of a non-trunked two- way radio communication system.