021_EETE

EETE JUNE 2013

M2M Comunications Fig. 2: Application scope. delivery and documents and secures the process in detail. UDP, in contrast, is like a cycle courier. Packages reach their destination faster but there is not the same delivery audit service. That is reflected in the package size. A TCP header is usually 20 to 60 bytes long, a UDP header a mere eight bytes. Developers can estimate the data volume to be transmitted by counting the number of packages required to transmit the data. Cost-effective solutions can be achieved by means of skillful programming and M2M tariffs that bill all data packages in the smallest block sizes. In several German forests, for example, a tracking solution to combat timber theft is in use that manages with a flatrate of 1 MB per month—and that includes Europe-wide tariffs, including roaming. Framework An M2M solution’s framework can be described in terms of the aspects security, scalability, and availability. The security requirements result from the purpose and context of the application. For industrial applications and processing businesscritical data the security requirements are very high; for M2M solutions for entertainment purposes they are, by contrast, significantly lower. To protect business-critical data mobile network operators provide special VPN offerings for machineto machine communication. An IPSec tunnel is built between the private corporate network and a private APN to protect the data transferred. If resources become very large during an M2M application’s life cycle, its scalability must be ensured. How many devices are in use over which periods of time? How does the application handle large amounts of data or a large number of devices? How does that influence performance? Only one or two devices may be used with a prototype, but up to several thousand devices may be involved once an M2M application reaches the market. Availability is another key aspect in the use of M2M solutions. In some scenarios the most continuous availability of connected devices must be ensured. Medical applications that monitor patients’ vital functions and alert the physician in an emergency must always be well connected. In other scenarios continuous availability is not essential. Slight delays are not critical for a watering solution for window boxes, for example. To cater for different requirements mobile network operators offer different M2M service level agreements. They must be booked in addition to the SIMs and guarantee certain quality parameters such as network availability and coverage. MNOs provide special portals for managing SIM cards and chips. Solution providers can activate SIM cards and set monthly data volume limits via Deutsche Telekom’s M2M Service Portal, for example. Next steps The sum of all the requirements is the basis for the system design. It gives developers a rough idea of which components they will need to take into account in designing their M2M applications. The next step consists of converting the system design into a detailed design in which placeholders are replaced by detailed specifications. Only then do implementation and test cycles get under way. Reaching a coherent design is an important stage in the development process but not the only one. A point of contact for all M2M development phases within Deutsche Telekom is its M2M Developer Community - www. developergarden.com/m2m/home - where developers will find entry packages, support, comprehensive documentation, and a living community of developers which are interested in making their solution out of the broad spectrum of M2M-applications available. And having developed a solution they can sell it via Deutsche Telekom’s outreach worldwide. 5G WiFi combo chips target entry-level market Broadcom Corporation has introduced its first 5G WiFi combination chips targeted specifically for entry-level consumer devices, including PCs, notebooks, tablets and smartphones. With more enterprise and retail routers rapidly moving to the IE 802.11ac standard, the infrastructure is in place for broad adoption by PCs, tablets and smartphones, opening up significant new opportunities for 5G WiFi to be integrated into mass market platforms. As the first company to deliver 802.11ac technology across all product segments, Broadcom is well positioned to capitalize on these opportunities by providing original equipment manufacturers (OEMs) an affordable solution that offers all of the performance, range and power advantages of 5G WiFi in a single-chip design. As Broadcom’s second generation of 5G WiFi combo chips, the BCM43162 and BCM4339 offer the same unmatched performance, range and power consumption benefits as the flagship 5G WiFi combo chip, the BCM4335, but integrate the complete front-end, power amplifier (PA) and low noise amplifier (LNA), to enable a low-cost, mass market solution. The BCM43162 is a peripheral component interconnect express-based (PCIe) client solution for PCs and notebooks with support for Microsoft Windows operating system, and the BCM4339 with secure digital input output (SDIO) interface, is a mobility solution for smartphones and tablets with support for Microsoft Windows and Android operating systems. Additional features include: transmit beamforming and low-density parity-check (LDPC) codes for greater coverage and robust whole-house media and data applications; 433 Mbps WLAN PHY rate for superior speed; Broadcom proprietary TurboQAM for 33 percent increase in 2.4 GHz speed; and Broadcom proprietary Channel Smoothing WLAN PHY to increase receiver sensitivity by an average of 2 db across 802.11n and 802.11ac rates. Broadcom - www.broadcom.com 20 Electronic Engineering Times Europe June 2013 www.electronics-eetimes.com


EETE JUNE 2013
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