Sensitech’s ColdStream™ Infrastructure defines the integrated RF-enabled temperature monitoring applications. These applications are made up of hardware, software and service components to deliver increased visibility into your cold chain.

Program Advantages
	Wireless, RF-enabled monitoring for reliable data gathering of time, location and condition information
	End-to-end supply chain monitoring includes loading, staging, and storage for a comprehensive view of internal and external processes
	Rules-driven alarming and alerting to address temperature anomalies quickly
	Permission-based repository gives individual stakeholders access to only the information appropriate for their evaluation needs
	Robust analytics engine for an in-depth assessment of weaknesses in cold chain management practices
	Reporting for every level of evaluation: dashboards, transaction detail, and management summary reports

Infrastructure Components
TempTale® RF-enabled (TTRF) temperature monitoring devices operate within a RF mesh-networking environment and interacts with ColdStream™ Infrastructure components for enhanced reliability and availability.
	Active RFID tag to measure and store ambient temperature data at set intervals, set alarm limits, read information on the front panel LCD display and start, mark or stop the measurements with the front panel buttons; fully backward compatible with standard TT4 devices.
	Stores location information when a ColdStream™ Infrastructure component (TTRF Monitor, TTRF Gateway, TTRF Repeater or TTRF Signpost) is detected and records the location of the ColdStream™ Infrastructure.
	Operates within the 915 or 868 MHz ISM band for optimal transmission in high water-content product situations. A TTRF will never transmit until it has detected that it is within the vicinity of an active ColdStream™ Infrastructure, i.e. an operational TTRF Gateway and/or TTRF Repeater.

TempTale RF Gateway is a reader that is attached via an Ethernet connection to the PC controlling the wireless network. When a TTRF Gateway is shipped, its operating frequency band is set (either 915 MHz or 868MHz). The TTRF Gateway then chooses a channel within the band based on the current signal-to-noise ratio measured in each channel.

The TTRF Gateway has a firmware-based Ethernet controller that is assigned an IP address or can be configured to use DHCP.

TempTale RF Repeater is used to extend the area that is covered by the network. TTRF Repeaters pass signals from the TTRF Monitors (and other TTRF Repeaters) to the TTRF Gateway. TTRF Repeaters require only a connection to standard AC power outlets. When a TTRF Repeater is first installed, it searches for the presence of a TTRF Gateway. It then uses the same channel as the TTRF Gateway.

TempTale RF Signpost is used at locations where it is not necessary to read data from the monitors. TTRF Signposts transmit a location ID that is stored in the monitors. As such, TTRF Signposts are typically used to record the length of time a shipment spends at a specific facility. TTRF Signposts are used in facilities that do not have a TTRF Gateway and TTRF Repeaters.

How the Network Infrastructure Works

For a small area the wireless network will only consist of a TTRF Gateway and control PC. For larger areas, (i.e., a distribution center that contains multiple loading dock doors, or a large refrigerated storage area) the network would also contain one or more TTRF Repeaters.

For any location that only needs to have the TTRF Monitor record its location, a stand alone TTRF Signpost would be used. Whenever a TTRF Monitor detects the presence of a TTRF Gateway, TTRF Repeater, or standalone TTRF Signpost, the TTRF Monitor records the facility location identifier associated with that network along with a timestamp.

Network Infrastructure Security

Data Security
Data within the ColdStream™ Infrastructure is encrypted at the source with a TEA algorithm and decrypted at the destination (on the TTRF Gateway). This algorithm should provide basic protection from inadvertent viewing or hacking. In addition, the data downloaded from the TTRF Monitors is in binary format – which is not in human readable format. This provides an additional level of security from an outside person viewing the data.

Wireless Network Security
he ColdStream™ Infrastructure is designed to only accept valid packets with a known destination. That is, the TTRF Monitors will only talk to the ColdStream™ Infrastructure. Nearby systems using wireless communications can share the radio spectrum but will not impact the ColdStream™ Infrastructure since the packets will not be in the same format and will not use the same protocols.

The ColdStream™ Infrastructure is also designed where the end device (TTRF Monitor) must check in with our ColdStream™ Infrastructure and then only communicate when requested. The devices will not respond to commands not within this framework of commands specified by the application at any level (TTRF Monitor, TTRF Gateway, TTRF Repeaters, TTM-RSS on PC).

Corporate Network Security
The TTRF Monitor will only respond to specific commands sent to it by the ColdStream™ Infrastructure (TTRF Gateways and TTRF Repeaters). The TTRF Repeaters will only talk to other TTRF Repeaters or TTRF Gateways. The TTRF Gateway will only talk to specific commands sent to it by the control PC. The APIs in the control PC services can only be used to talk to a TTRF Gateway on the same subnet. These series of commands are limited to getting the status of a TTRF Monitor and downloading data from the monitors into the control PC via an encrypted RF network. No other type of commands and no access to the internal Corporate Internet is possible by these devices.

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