Dual-Config RF Transceiver for Security Node Range
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Security monitoring systems face limitations in extending wireless coverage due to battery life of nodes and signal range, particularly in larger properties, leading to potential security vulnerabilities and increased administrative costs.
Innovation Solution
A security monitoring system with nodes and a central unit that utilize dual radio frequency configurations: a first configuration for high-speed communication within range and a second configuration with lower bitrate and longer range for extended communication, allowing direct single-hop communication and adaptive frequency selection to optimize signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If nodes use high-bitrate radio frequency configuration for communication, then communication speed is improved, but transmission range is limited and battery consumes faster
Solution Approach 1:
The radio frequency transceiver dynamically switches between first and second configurations based on communication needs. The controller selects high-bitrate mode when nodes are within range and low-bitrate mode when extending range is needed, making the system adaptable to different operational conditions rather than fixed in one mode
Solution Approach 2:
The system changes key radio frequency parameters including bitrate, receiver bandwidth, and transmission power between two configurations. The first configuration uses high bitrate with wider bandwidth, while the second uses low bitrate with narrower bandwidth, allowing optimization of the trade-off between communication speed and battery consumption
2Speed
If nodes use high-bitrate radio frequency configuration, then communication speed is improved, but transmission range decreases
Solution Approach 1:
The system dynamically adjusts radio frequency configuration based on distance requirements. When nodes need to communicate over longer distances, the controller switches to the second configuration with lower bitrate but extended range, and switches to first configuration when high speed is needed and nodes are within range
Solution Approach 2:
The system changes receiver bandwidth and transmission parameters between configurations. The second configuration uses smaller receiver bandwidth which extends transmission range but reduces bitrate, while the first configuration uses larger bandwidth for higher speed but limited range
3Length of stationary object
If multi-hop transmission is used to extend coverage, then transmission range is improved, but energy consumption increases and latency increases
Solution Approach 1:
The system segments radio frequency configurations into two distinct modes rather than using multi-hop transmission. By having the transceiver switch between first and second configurations, direct single-hop communication is maintained even for distant nodes, avoiding the energy overhead of multiple relay transmissions
4Speed
If receiver bandwidth is increased for high-speed communication, then communication speed is improved, but transmission range decreases
Solution Approach 1:
The system explicitly changes receiver bandwidth as a controllable parameter between two configurations. The first configuration uses larger receiver bandwidth for high-speed communication, while the second configuration uses smaller receiver bandwidth to extend transmission range, allowing optimization based on operational needs
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A security monitoring system comprising: a central unit that comprises at least one radio frequency transceiver configurable with either of a first configuration and a second configuration, and a controller for controlling the or each radio frequency transceiver; a node comprising a node radio frequency transceiver operable in the first configuration, for communication with the central unit, and in the second configuration for communication with the central unit, and a controller for controlling the node radio frequency transceiver; wherein the second configuration has a lower bitrate and a smaller receiver bandwidth than the first configuration. The node is configured to register with the central unit on initial installation, and is further configured, on initial installation, to attempt to establish communication with the central unit using the first configuration, and, if the node is unable to establish communication with the central unit using the first configuration, to attempt to establish communication with the central unit using the second configuration. On the node establishing, on initial installation, communication with the central unit, the central unit being configured to transmit an acknowledgement using the configuration used by the node to establish communication with the central unit. The node and the central unit being configured thereafter to: exchange security keys and system settings using the configuration that was used by the node to establish communication with the central unit, and subsequently to communicate with the node using that configuration.