Asymmetric Wireless Broadband Data Network for Public Safety
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Solution Overview
Problem
Conventional mobile data networks in public safety bands have limited bandwidth, making it difficult to support advanced applications like video streaming and large data file transmission, and unlicensed/public networks lack reliability and interoperability for integrated use of CAD, AVL, and other public safety applications.
Innovation Solution
An asymmetric wireless broadband data network is implemented using a combination of low data rate and high data rate channels, where data requests are received via low data rate networks and transmitted via either network based on criteria such as location, link quality, and data size, utilizing RF public safety channels and ATSC-M/H broadcast signals for extended range and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mobile data networks are used in public safety bands, then reliability and isolation are maintained, but bandwidth is limited and cannot support advanced applications
Solution Approach 1:
The patent combines conventional public safety band networks with unlicensed band networks to create a hybrid network architecture. This merging allows the system to maintain the reliability of public safety bands while gaining the high bandwidth capacity of unlicensed bands, enabling support for advanced applications like video streaming and large data file transmission.
Solution Approach 2:
The network system is designed to perform multiple functions by operating across different frequency bands. It can handle both traditional public safety communications and advanced data applications simultaneously, making the network universally capable of supporting diverse application requirements.
2Quantity of substance
If unlicensed bands or public cellular networks are used to obtain larger bandwidth, then bandwidth capacity increases, but reliability and isolation from overload are compromised
Solution Approach 1:
The system merges unlicensed band networks with public safety band networks, using the unlicensed bands for high-capacity data transmission while relying on public safety bands for reliable control and critical communications, thus achieving both high bandwidth and reliability.
Solution Approach 2:
The network traffic is segmented into different bands based on requirements: critical and control traffic uses public safety bands for reliability, while data-intensive applications use unlicensed bands for high bandwidth, optimizing overall system performance.
3Productivity
If public cellular networks are deployed to maximize capacity, then data rate increases, but reach and reliability are reduced
Solution Approach 1:
The system applies different network characteristics to different locations and applications: high data rate capabilities are provided where needed through unlicensed bands, while public safety bands ensure reliable coverage in areas requiring reach and critical communications.
Data Source
AI summary
An asymmetric wireless network (100) includes a first base station (104) including a RF transceiver (208) having a first transmission range, a first transmit data rate, and a first coverage area. The wireless network also includes a second base station (106) comprising a RF transmitter (210) having a second transmission range, a second transmit data rate, and a second coverage area. In the wireless network, the second transmit data rate is greater than the first transmit data rate, the first and the second transmission ranges are substantially equal, and the first and the second coverage areas at least partially overlap. The wireless network also includes at least one computer network (108) communicatively coupling the base stations, configured for generating transmit data in response to a data request received at the first base station, and configured for routing the transmit data to the first or the second base station for transmission.