Smart Cities

Rohde & Schwarz provides test package for C-V2X protocol

Tue, Apr 09, 2019

Approval for Rohde & Schwarz’s cellular vehicle-to-everything (C-V2X) protocol conformance testing package, reassures customers that it fulfils the specification defined by the Global Certification Forum (GCF). The approval is based on tests executed using the CMW500 wideband radio communication tester and SMBV100A vector signal generator.

The GCF certifies the conformance of cellular handsets to ensure that handsets operate as specified with the wide range of base station hardware installed by network operators.

The organisation announced the inclusion of cellular (LTE) based vehicle-to-everything (V2X) and vehicle-to-vehicle (V2V) communication technologies within its certification program. This certification focuses specifically on LTE sidelink, an adaptation of core LTE standards (as defined in 3GPP Release 14) that allows communication between two or more nearby devices. It can be provided on any LTE band with the 5.9 GHz band allocated for intelligent transport system (ITS) services.

Rohde & Schwarz believes it is the first test and measurement equipment manufacturer to meet the GCF test platform approval criteria (TPAC) for C-V2V protocol conformance testing.

On the wireless communication side, the CMW500 wideband radio communication tester supports both LTE-A and WCDMA/HSPA+ technologies as well as performing LTE sidelink functionality testing on the communication link to the C-V2X module. It can be used in conjunction with the SMBV100A vector signal generator, which simulates the GNSS signals of global positioning services such as GPS, GLONASS, Galileo, and BeiDou. Implementation of the GCF-approved protocol tests are provided through the CMW-KK550 software package.

Rohde & Schwarz supports developers and engineers that are new to automotive C-V2X module testing and enables existing customers and test houses to leverage existing hardware to support C-V2X compliance testing through a simple software upgrade.

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http://www.rohde-schwarz.com

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Integrated RF modules create 6LoWPAN sub-GHz mesh

Fri, Apr 05, 2019

A wireless IP mesh based on fully integrated RF modules has been created by Radiocrafts.

A new family of RF modules form a complete wireless IP mesh for long range IoT access. The RIIM (Radiocrafts Industrial IP Mesh) uses 6LoWPAN, a lightweight version of IPv6.  This allows the user to access each sensor and controller from the internet using IP addressing. The radio protocol uses IEEE 802.15.4 g/e providing bi-directional communications with short transmission pulses that enables dense networks with high reliability and very low power consumption.

RIMM will enable customers to get to market quickly, based on Radiocrafts’ compact RF module as the foundation, simple set-up and a novel way to interface any sensor or actuator, the Intelligent C-programmable I/O (CIO). Customers can create complex applications managing and interfacing sensors and actuators in less than 100 lines of C-code, removing the need for an external microcontroller in the devices, advises Radiocrafts.

A complete RIIoT network includes sensor nodes based on the RC1882CEF-IPM module. The module can be configured as any of the required network nodes, a border router, a mesh router or a leaf node.

The Wireless IP Mesh does not require any license or subscription, and is very low power.

It operates at 868 or 915MHz frequency and is based on a mesh network topology, using IPv6 to address each leaf node. It can support several hundred nodes in a network, reveals Radiocrafts, yet has very low power consumption; it offers a five-year lifetime on a 2000mAh coin cell battery.

The universal sensor/actuator ICI interface means that no external microcontroller is required.

The network range is up to 20km and up to 29 mesh hops can be supported.

Ethernet access to the RIIM network is via the Radiocrafts border router. The network is cloud-compatible via the CBOR protocol.

http://www.radiocrafts.com

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RS Components offers humidity and temperature sensor from Sensirion

Fri, Apr 05, 2019

Equipped with a membrane to protect against water and dust, Sensiron’s SHT85 temperature and humidity sensor is available from RS Components.

It has a pin-type connector for easy integration and replacement and offers thermal coupling to its surrounding environment as well as decoupling from potential heat sources on the main processing board.

It meets IP67 rating and can operate in harsh environments. The membrane protects the sensor opening from water and dust with the response time of the relative humidity (RH) signal unaffected.

The SHT85 offers a calibrated, linearised and temperature-compensated digital output. It also has final product level testing to deliver a typical accuracy of ±1.5 per cent (RH) and ±0.1 degree C, an I²C interface with communication speeds up to 1MHz, fast start-up and measurement time, low signal noise and an operating voltage from 2.15 up to 5.5V.

The Sensirion SHT85 humidity and temperature sensor is now shipping from RS in the EMEA and Asia Pacific regions.

RS Components is a trading brand of Electrocomponents, a multi-channel provider of industrial and electronic products. It offers more than 500,000 industrial and electronics products, sourced from over 2,500 leading suppliers, and provides value-added services to over one million customers, shipping more than 50,000 parcels a day from operations in 32 countries.

https://uk.rs-online.com

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PoE chipset exploits IEEE 802.3bt specificiation

Thu, Apr 04, 2019

Reliable and space-efficient powered devices (PDs) can be built to take advantage of the latest IEEE 802.3bt Power-over-Ethernet (PoE) specification, says STMicroelectonics, on the introduction of the PM8804 and PM8805.

The PM8804 and PM8805 provide the PoE-converter circuitry for PDs up to class-eight, which defines a usable power budget of 71W. According to STMicroelectronics, the chipset saves space, enhances reliability, and cuts time to market for 5G small cells, WLAN access points, switches, and routers. The PoE chipset also targets smart-building and smart office applications such as IP cameras, access-control systems, display panels, lighting, curtain or shutter controllers, video-call systems, IP phones, and tabletop consoles.

The PM8804 implements a PWM controller for a 48V isolated flyback or forward converter, including dual low-side gate drivers for high-efficiency forward active-clamp topologies. The operating frequency is selectable up to 1MHz, allowing the use of small external filter and decoupling components for high power density. The PM8804 is a high-voltage start-up regulator with 20mA output capability to help save on board space and bill of materials.

The PM8805 companion chip contains two active bridges, a charge pump for driving high-side MOSFETs, a hot-swap FET, and the IEEE 802.3bt compliant interface. Integrating the active bridges saves the real estate otherwise occupied by eight discrete MOSFETs and their driving circuitry, explains STMicroelectronics. The PM8805 generates a power-good signal for enabling the PM8804 and other circuitry such as an LED driver, and supports maintain power signature (MPS) current control that allows the PD to enter power-saving standby without being disconnected.

Both devices are in production now. The PM8804 is packaged as a 3.0 x 3.0mm, 0.5mm-pitch VFQFPN-16. The PM8805 in 8.0 x 8.0mm thermally enhanced VFQFPN-43 featuring exposed pads.

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