Hierarchical Cellular Network Common Resource Allocation
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Solution Overview
Problem
Cellular radio communication systems face challenges in responsiveness during rapid changes in transmission conditions, such as jamming, rapid attenuation, or rapid masking, which can lead to communication channel interference or disconnection, and existing automatic handover mechanisms are not sufficiently responsive to handle these issues.
Innovation Solution
A communication system with a hierarchical cellular radio network that reserves a common transmission resource in each TDMA frame, allowing communication nodes to broadcast information independently of their base, enabling quicker synchronization and reconfiguration in response to changing conditions, and allowing nodes to broadcast messages via this common resource to improve system reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic handover mechanism is used for base-handset transfer, then communication continuity is maintained, but responsiveness to rapid transmission condition changes is insufficient
Solution Approach 1:
The patent implements preliminary action by having handsets proactively detect transmission conditions (jamming, fading, masking) and pre-prepare for handover before the current connection fails. The system monitors channel quality continuously and triggers handover procedures in advance, rather than waiting for connection failure as in traditional automatic handover mechanisms.
Solution Approach 2:
The patent employs feedback mechanisms where handsets continuously report transmission condition status to the network, and the system responds by adjusting handover timing and parameters. This closed-loop feedback enables the system to adapt to rapid changes in transmission conditions, improving both reliability and responsiveness simultaneously.
2Adaptability or versatility
If handsets wait for base acknowledgment before changing communication channel, then protocol compliance is maintained, but system reactivity to jamming or fading is reduced
Solution Approach 1:
The patent implements dynamics by making the handover protocol adaptive rather than static. The system can operate in different modes: normal protocol-compliant mode under good conditions, and accelerated reactive mode when jamming or fading is detected. This dynamic behavior allows the system to maintain protocol compliance when possible while achieving high reactivity when necessary.
Solution Approach 2:
The patent changes key protocol parameters (such as handover trigger thresholds, timing advances, and channel selection criteria) based on detected transmission conditions. When rapid fading or jamming is detected, the system modifies these parameters to enable faster channel switching, effectively adapting the protocol behavior to current environmental conditions.
3Device complexity
If communication nodes rely on hierarchical base-handset structure, then network organization is simplified, but responsiveness during rapid transmission condition changes is limited
Solution Approach 1:
The patent applies segmentation by dividing the monolithic base-controlled handover function into distributed components: local condition detection at each handset, autonomous preliminary handover preparation, and coordinated execution with the base. This segmentation enables faster local decision-making while maintaining overall network organization through the hierarchical structure.
Data Source
AI summary
The invention relates to a communication system comprising communication nodes communicating via multi-frequency, time division multiple access frames. The nodes form a hierarchical cellular radio network that defines hierarchical levels which each include a base and at least one handset. The communication nodes are enabled to communicate via the base of the hierarchical level thereof. A master node comprises: a means (4.2) for selecting, in each of the frames, a transmission resource that is common to said communication nodes; a means (4.3) for broadcasting to the communication nodes, through the hierarchical levels via the respective bases thereof, information representative of the selected common transmission resource. The system is suitable for enabling said communication nodes to broadcast messages via the selected common transmission resource.