M.E. (Sem-1) Introduction of DASH7 Technology Roll No: 09

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A

Seminar report

On

“Introduction of DASH7 Technology”

Submitted by

Mr. Karavade Gaurav Hemant

Under the guidance of

Prof. Nigvekar A. R.

In partial fulfilment for the award of the degree

Of

MASTER OF ENGINEERING (PART- I)

IN

ELECTRONICS & TELECOMMUNICATION ENGINEERING

K.I.T.’S COLLEGE OF ENGINEERING,

KOLHAPUR

DEPARMENT OF ELECTRONICS & TELECOMMUNICATION ENGINEERING

2012-2013

SHIVAJI UNIVERSITY: KOLAPUR 416008

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CERTIFICATE

This is to certify that Mr. Karavade Gaurav Hemant. Of M.E (Electronics &

Telecommunication) have satisfactorily completed the seminar work entitled

“Introduction of DASH7 Technology”

A seminar report submitted towards the partial fulfillment for the degree of

Master of Electronics & Telecommunication engineering as laid down by the Shivaji

University, Kolhapur

Department of Electronics & Telecommunication engineering

2012-2013

Dr. M.S.Chavan. Prof. A. R. Nigavekar

HEAD OF DEPARTMENT GUIDE

Dr.V.G.Sangam.

PRINCIPAL

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ACKNOWLEDGEMENT

I take this opportunity to express my deepest gratitude and sincere thanks to my

guide Prof. A. R. Nigvekar For his constant encouragement and valuable guidance

during the completion of my seminar. Being under his guidance has benefited me

comprehensively. His appreciation during the good times and their valuable guidance

during the times wherein we were stuck at some points had been boosting our morals.

I am very thankful to Dr. M. S. Chavan. Head of Department of electronics for his

valuable co-operation.

Finally to express my sincere gratitude to all those who helped me directly or

indirectly in many way for completion of this seminar.

Mr. Karavade Gaurav Hemant

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INDEX

Sr. No. Title Page No.

1. INTRODUCTION 1

2. LITERATURE SURVEY 2

2.1. BLUETOOTH 2

2.2. WI-FI4 3

2.3. ZIGBEE 4

2.4. DSAH7 5

3. DASH7 TECHNOLOGY 7

3.1. FEATURES 7

3.2. BLAST 8

3.3. TAG TO TAG COMMUNICATION 9

3.4. COMMUNICATION RANGE 9

3.5. INTEROPERABILITY 11

3.6. PSD ANALYSIS 12

3.7.DASH7 ALLIANCE 13

3.8.ISO/IEC 18000-7 AIR INTERFACE STANDERD 15

4. APPLICATION 16

4.1. COMMERCIAL APPLICATION 16

4.2. DEFENSE APPLICATION 17

5. DEVLOPER SUPPORT 19

5.1. OPEN TAG 19

5.2. SEMICONDUCTOR INDUSTRY SUPPORT 19

5.3. DEVOLPER TEST & TOOLS 20

6. ISM BAND 21

7. CONCLUSION 25

8. FUTURE SCOPE 26

9. REFERANCES 27

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ABSTRACT

DASH7 is a new, market alliance with the goal of increasing the market size for ultra-low-power

wireless product lines by cultivating a global network of partners in this space. As the name hints,

the basis for DASH7’s goal is with the ISO 18000-7 standard for low power RF.

Together, DASH7 partners affectively address interoperability as well as the development and

ratification of improved functions into the standard.

DASH7 is an open source wireless sensor networking standard for wireless sensor networking,

which operates in the 433 MHz unlicensed ISM band. DASH7 provides multi-year battery life,

range of up to 2 km, indoor location with 1 meter accuracy, low latency for connecting with moving

things, a very small open source protocol stack, AES 128-bit shared key encryption support, and

data transfer of up to 200 kbit/s. DASH7 is the name of the technology promoted by the non-profit

consortium called the DASH7 Alliance.

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1. INTRODUCTION

DASH7 is an open source wireless sensor networking standard for wireless sensor networking,

which operates in the 433 MHz unlicensed ISM band. DASH7 provides multi-year battery life,

range of up to 2 km, indoor location with 1 meter accuracy, low latency for connecting with moving

things, a very small open source protocol stack, AES 128-bit shared key encryption support, and

data transfer of up to 200 kbit/s. DASH7 is the name of the technology promoted by the non-profit

consortium called the DASH7 Alliance

DASH7 follows the ISO/IEC 18000-7 open standard for the license-free 433 MHz ISM band air

interface for wireless communications. 433 MHz is available for use worldwide. The wireless

networking technology was originally created for military use and has been re-purposed for mainly

commercial applications in place of proprietary protocols like ZigBee or Z-Wave.

Note that "Range" is highly dependent on many factors including the transmitter's output power,

such that higher power transmitters will be able to communicate at further distances at the

immediate cost of increased power consumption. In addition, "Range" is also affected by the

communication data-rate, such that higher data-rates (e.g. 200-250kbit/s) will yield a lower

communication distance than 10kbit/s. Lower data-rates are more immune to channel-noise, thus

effectively increasing signal-to-noise ratio and receiver sensitivity, as a result. The "Average Power

Draw" also depends heavily on the communication duty cycle, i.e. how often the radio and micro-

controller wake-up to send a packet. In addition to duty cycle, the average power draw is almost

entirely dependent on the silicon-chip manufacturer's implementation, and has nothing to do with

the choice of frequency (i.e. 433 MHz or 2.4 GHz). For example, CC2530 consumes 29mA at

+1dBm transmit power, JN5148 consumes 15mA at +3dBm, and ATmega128RFA1 14.5mA at

3.5dBm. Sleep currents of the micro-controller with RAM retention is also equally important. How

often you consume energy is application dependent.

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2. LITERATURE SURVEY

2.1. Bluetooth:

Bluetooth is a proprietary open wireless technology standard for exchanging data over short

distances (using short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from

fixed and mobile devices, creating personal area networks (PANs) with high levels of security.

Created by telecoms vendor Ericsson in 1994, it was originally conceived as a wireless alternative

to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

Bluetooth is managed by the Bluetooth Special Interest Group, which has more than 16,000

member companies in the areas of telecommunication, computing, networking, and consumer

electronics. The SIG oversees the development of the specification, manages the qualification

program, and protects the trademarks. To be marketed as a Bluetooth device, it must be qualified to

standards defined by the SIG. A network of patents is required to implement the technology and are

licensed only for those qualifying devices.

The Bluetooth wireless technology is basically divided in two different systems:

Basic Rate (BR) and Low Energy (LE).

The BR systems can include the Enhanced Data Rate (EDR) mode and a High Speed (HS) mode.

Pure BR systems (v1.2) are up to 721 Kbps [BSIGG].

BR/EDR (v2.0 and v2.1) offers the 2 Mbps (referred as π/ 4 -DQPSK) and 3 Mbps (referred as

8DPSK) modes and HS (v3.0) can reach 24 Kbps [BSIGS]. LE systems (v4.0) have lower

consumption and lower data rates. Versions 2.1 and 2.0 are backward compatible.

The Bluetooth LE has an entirely new protocol stack compared to the standard protocols defined

in v1.0 v2.0 and v3.0, previously named WiBree and Bluetooth ULP (Ultra Low Power). The wake

up latency usually is of about 3 seconds.

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2.2. Wi-Fi:

Wi-Fi is a popular technology that allows an electronic device to exchange

data wirelessly (using radio-waves) over a computer network, including high-speed

Internet connections. The Wi-Fi Alliance defines Wi-Fi as any "wireless local area

network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers'

(IEEE) 802.11 standards". However, since most modern WLANs are based on these standards, the

term "Wi-Fi" is used in general English as a synonym for "WLAN".

A device that can use Wi-Fi (such as a personal computer, video game console,

smartphone, tablet, or digital audio player) can connect to a network resource such as the Internet

via a wireless network access point. Such an access point (or hotspot) has a range of about 20

meters (65 feet) indoors and a greater range outdoors. Hotspot coverage can comprise an area as

small as a single room with walls that block radio waves or as large as many square miles this is

achieved by using multiple overlapping access points.

"Wi-Fi" is a trademark of the Wi-Fi Alliance and the brand name for products using the IEEE

802.11 family of standards. Only Wi-Fi products that complete Wi-Fi

Alliance interoperability certification testing successfully may use the "Wi-Fi CERTIFIED"

designation and trademark.

Wi-Fi has had a checkered security history. Its earliest encryption system, WEP, proved easy to

break. Much higher quality protocols, WPA and WPA2, were added later. However, an optional

feature added in 2007, called Wi-Fi Protected Setup (WPS), has a flaw that allows a remote attacker

to recover the router's WPA or WPA2 password in a few hours on most implementations.[2

Some

manufacturers have recommended turning off the WPS feature. The Wi-Fi Alliance has since

updated its test plan and certification program to ensure all newly certified devices resist brute-force

AP PIN attacks.

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Protocol Release Frequency Modulation Max data

rate

Inner range

802.11a

1999 5 GHz OFDM 54 Mbps 35 m

802.11b 1999 2.4 GHz DSSS 11 Mbps 35 m

802.11g

2003 2.4GHz OFDM/DSSS 54 Mbps 38 m

802.11n 2009 2.4/5 GHz OFDM 150 Mbps 70 m

(Table 1: Wi-Fi protocols overview)

2.3. Zigbee:

ZigBee is a specification for a suite of high level communication protocols using small, low-

power digital radios based on an IEEE 802 standard for personal area networks. ZigBee devices are

often used in mesh network form to transmit data over longer distances, passing data through

intermediate devices to reach more distant ones. This allows ZigBee networks to be formed ad-hoc,

with no centralized control or high-power transmitter/receiver able to reach all of the devices. Any

ZigBee device can be tasked with running the network.

ZigBee is targeted at applications that require a low data rate, long battery life, and secure

networking. ZigBee has a defined rate of 250 kbit/s, best suited for periodic or intermittent data or a

single signal transmission from a sensor or input device. Applications include wireless light

switches, electrical meters with in-home-displays, traffic management systems, and other consumer

and industrial equipment that requires short-range wireless transfer of data at relatively low rates.

The technology defined by the ZigBee specification is intended to be simpler and less expensive

than other WPANs, such as Bluetooth.

Network Layer:

ZigBee Routers and the ZigBee Coordinator are given routing capacities, and can discover

neighbours and routes to those neighbours. This is performed through the AODV (Ad-hoc On

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Demand Vector) protocol, as follows : a route request is broadcasted to all neighbours, which

froward it to all their neighbours, and so on until the searched for device receives the request, and

unicasts its route answer to the source via the lowest cost path.

Application Layer:

The application Layer is the one which the end user is faced with. It defines ZDOs (ZigBee

Device Objects), whose roles comprise keeping the role played by the device in the network

(namely ZC, ZR or ZED) and managing device discovery, requests to join a network, security and

more. The Application Support Sublayer stores and maintains binding tables as a database. ZigBee

also defines device profiles, so that any application could ideally dispose of a protocol perfectly

adapted to its needs and constraints.

2.4. Dash7:

DASH7 is an open source wireless sensor networking standard for wireless sensor networking,

which operates in the 433 MHz unlicensed ISM band. DASH7 provides multi-year battery life,

range of up to 2 km, indoor location with 1 meter accuracy, low latency for connecting with moving

things, a very small open source protocol stack, AES 128-bit shared key encryption support, and

data transfer of up to 200 kbit/s. DASH7 is the name of the technology promoted by the non-profit

consortium called the DASH7 Alliance.

DASH7 follows the ISO/IEC 18000-7 open standard for the license-free 433 MHz ISM band air

interface for wireless communications. 433 MHz is available for use worldwide. The wireless

networking technology was originally created for military use and has been re-purposed for mainly

commercial applications in place of proprietary protocols like ZigBee or Z-Wave.

DASH7 utilizes the 433.92 MHz frequency, which is globally available and license-free.

433.92 MHz is ideal for wireless sensor networking applications since it penetrates concrete and

water, but also has the ability to transmit/receive over very long ranges without requiring a large

power draw on a battery. The low input current of typical tag configurations allows for battery

powering on coin cell or thin film batteries for up to 10 years.

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Note that 433.92 MHz is the same as 13.56 multiplied by the number 32, or 2^5th power, which

effectively means DASH7 radios can utilize the same antennae used by 13.56 MHz radios including

Near Field Communications, FeLiCa, MiFare, and other near-field RFID protocols.

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3. DASH7 TECHNOLOGY

Real Time Localization Systems have become a common modern utility and a

variety of different implementations exist. Real-Time Localization Systems (RTLS) are not

limited to outdoor localization with GPS. By using other sensor technologies or a

combination of sensor technologies; indoor localization can also be achieved. An

e x a m p l e of such a l o ca l i z a t i o n system is proposed by When in Opportunistic

Seamless Localization. In order to enable new applications which are capable of

performing indoor localization, the new DASH7 Mode 2 (D7M2) technology will be

used. This new technology is an open source wireless sensor networking standard

which operates at a frequency of 433 MHz. DASH7 is a variation on active Radio

F r e q u e n c y Identification (RFID) technology but with a much greater range due to the

f r e q u e n c y . Its fields of application are building automation, access control, locat ion-

based services, mobi le adver t i s ing and logistics.

Depending upon where such a system would be implemented the range o f

communication varies f r o m 10 meters to a theoretical maximum of 10 kilometers. This is a

much greater range compared to other Wireless Sensor Network (WSN) technologies. In

addition to this greater range, these devices will consume less power.

DASH7 follows the ISO/IEC 18000-7 open standard for the license-free 433 MHz

Industrial, Scientific and Medical (ISM) band air interface for wireless communications. The

wireless networking technology was originally created for military use and has been

repurposed for commercial applications instead of proprietary protocols like ZigBee or active

RFID. DASH7 technology allows communication from tag-to-tag, has a much greater

range than active RFID and benefits from the 433 MHz work- ing frequency which makes

it a suitable replacement for mesh-networks

3.1 Features:

1. Frequency: - 433.92 MHz.

2. Range: - 10 m - 10 km.

3. Data Rate: - max 200 kbit/s.

4. Power: - Min.1 µW - Max. 29mW.

5. Multi-hop:- 2-hops.

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3.2 BLAST:

DASH7 incorporates the concept of “BLAST” in its operation. In comparison to typical

networks, BLAST does not rely on sessions because this is unnecessary in the

applications DASH7 is used for. These networks will have a more sporadic data

transmission which is typically slower but results in a lower power usage.

1. Bursty: - small and abrupt data transfers, that excludes v ideo or audio content.

2. Light: - packet sizes are limited to 256 bytes. In order to send larger packets,

consecutive packets may be sent but are to be avoided if possible.

3. Asynchronous: - There is no need for handshaking or synchronization between

DASH7 d ev i ce s . The main method of communication is by command and response.

4. Transitive: - a DASH7 system of devices is inherently mobile o r transitional. Unlike

o ther wi r e l es s t e c h n o l o g i e s DASH7 i s upload-centric, not download centric. Thus

devices do not need to be managed extensively by fixed infrastructure.

Most wireless technology throughout time has been designed to replace wired networks. Wired

networks cannot possibly be conceived to meet the needs of DASH7 applications. DASH7

applications are inherently mobile; devices and infrastructure can be mobile, and it is even

difficult to consider an alternate, wired network that could provide roughly similar function.

BLAST as a concept fits into this application model, and it suits low power RF extremely well.

DASH7 systems should b e u n d e r s t o o d no t as convent ional networks where the

organization is top-down and hierarchical, but instead as somewhat structure less pools of data which

were not previously accessible. We call this concept "ambient data," and it is possible largely by the

"transitive" attribute. Virtues of simplicity are able to cascade into all other areas of operation

because we are able to ignore the cost of maintaining a top-down hierarchy structure. Where

other standards have floundered by their lack of focus, these BLAST design principles

dramatically clarify the requirements for implementing an aggressively low power RF standard.

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3.3. Tag-to-Tag Communications:

Unlike most active RFID technologies, DASH7 supports tag-to-tag communications which,

combined with the long range and signal propagation benefits of 433 MHz, makes it an easy

substitute for most wireless "mesh" sensor networking technologies. DASH7 also

supports sensors, encryption, IPv6, and other features.

3.4. Communication range:

The standards above do not all put the same limits on transmit power. For Bluetooth, ZigBee and

ISO 18000-7, 0dBm @ 50 Ohms is the reference value which yields the nominal range as discussed

in product or standards literature. It is certainly possible to improve range by increasing the

transmission power or increasing the sensitivity of the receiver, although governments often have

regulations regarding allowable transmit power. Incidentally, both of these techniques also increase

the power requirement of the system.

It the form below, the Friis equation solves for free- space communication range when receiver

sensitivity (Pr), transmission power (Pt), receiver antenna gain (Gr), transmitter gain (Gt), and

wavelength (λ). The range value de- rived here is highly optimistic for real world scenarios – at least

because it doesn’t account for bandwidth or modulation – but more refined models of the Friis do

exist and the ranges values these produce remain proportional to the basic form, nonetheless. The

basic relationship is that as frequency goes up, range goes down.

The first three rows show that a 433MHz radio can have the same range as a similar 2.45GHz radio

even if the 433 MHz antenna system is only 3% as efficient. This is important in real world

applications where antennas are routinely de-tuned by environmental factors, often quite severely. In

the lower rows, typical book values are plugged-in to show the theoretical maximum range of each

researched solution at 1 mW transmit power (0 dBm). These values deviate from the nominal values

due to many factors: signal bandwidth, modulation, noise, and interference to name a few (a more

thorough study of these effects is available in the appendix).

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(Fig. 1. Graph of frequency versus range)

From the Friis equation of the last section one can determine that, with all else equal, the

lower frequency wave has a greater ability to penetrate space than does the higher frequency

wave (i.e. it has a longer range). This relation- ship is also a topic of quantum physics.

Early quantum physicist Louis De Broglie postulated that lower frequency waves can be

represented by smaller particles, whereas higher frequency waves are represented by larger

particles.

It’s beyond the scope of this paper to examine why, but the fact is that the smaller particles are

more mobile carriers of energy and travel farther. A case in point is the US Navy’s radio for

communicating with deep-submerged submarines anywhere in the world. It runs out of a station in

Michigan at the astonishingly low frequency of 76 Hz, and its waves (or particles) penetrate the Earth

itself.

Besides their better permittivity characteristics, lower frequency waves have longer wavelength

and diffract comparatively easily. (Diffraction is also outside the scope of this paper). The

important thing to remember is that when encroached by interfering objects, longer wavelengths will

more easily “bend” around these obstacles as light bends when put in proximity to a lens. This

property contributes to the non-line-of-sight attribute in table.

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3.5. Interoperability:

DASH7 devices use a single global frequency, which simplifies deployment and maintenance

decisions relative to specifications using multiple frequencies. A neutral, third party testing

authority also conducts conformance and interoperability testing under the DASH7 Certified

program.

DASH7 Alliance was created to promote an adoption of active tag technology based on ISO

18000-7 standards in commercial environments. DASH7 technology is the de-facto standard in the

militaries of many nations.

Many RFID deployments (especially in the transportation and logistics) use active and passive

tags. As an example, an ocean container may use active tags (433MHz). Pallets and cases inside

may use EPC global Gen2 passive tags (860-920 MHz range). The active tag could store ID’s of all

pallets inside, in addition to other data. This common scenario reflects that devices will have to

implement several standards (from different standards organizations). In the above scenario, an

active tag will implement several standards:

I. ISO 18000-7, ISO 18047-7 and DASH7 extensions.

II. EPC global Tag Data Standards 1.5.

III. Sensor data based on IEEE 1451.7 (ISO 21451.7).

IV. GPS data based on NMEA 0183.

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3.6. Power Spectral Density Analysis:

(Fig. 2. nominal, modeled power spectral densities of a low energy Bluetooth

transmission & a ZigBee (802.15.4) transmission.)

All power spectral densities (PSD's) from figures are plotted on a horizontal axis of Hertz and a

vertical axis of arbitrary, relative energy, representative of equal power transmission (nom. 1mW) in all

PSD's. Energy values from figure may thus be compared to figure

Figures indicate that the power of the ISO transmission is very different in shape than either the

Bluetooth spectrum, which uses narrowband FSK modulation, or the ZigBee spectrum which uses

QPSK and heavy spreading.

We can assume that channel filtering does exist in each of these solutions, and that it takes the

standard approach of passing 90% or more of the band power. In conjunction with figure 2.4b table

2.4a shows that ISO 18000-7 has relatively good in-band power utilization and that it does not, in

fact, employ a narrowband modulation. Low energy Bluetooth, on the other hand, does use an

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especially narrowband modulation, and this should be considered in any study concerning

interference. ZigBee employs substantial spectrum spreading techniques and thus has the lowest

bandwidth efficiency.

(Fig.3. nominal, modeled power spectral densities of an ISO 18000-7 transmission

matched to the specified modulation index of 1.8 and an ISO 18000-7 transmission

that is slightly mismatched (modulation index = 2.0).

One final observation is the nature of the power peaks at ± 55.55 kHz in the frequency-matched ISO

18000-7 PSD. If special filtering is used, roughly 70% of the power of the ISO signal can be received

from only 40 kHz bandwidth – yielding a Hz/bit of 1.44. When using receivers designed to take

advantage of this special property, ISO 18000-7 can deliver the interference robustness of a wideband

modulation and the bandwidth efficiency (i.e. free-space propaga- tion capacity) of a narrowband

solution.

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3.7. Dash7 Alliance:

The DASH7 Alliance is the body responsible for overseeing the development of the ISO 18000-

7 standard for wireless sensor networking, as well as interoperability certification

of DASH7 devices and the licensing of DASH7 trademarks. The DASH7 Alliance is an

industry consortium whereas "DASH7" is the name of the technology.

The DASH7 Alliance is a privately held, not-for-profit trade association founded in February

2009. The DASH7 Alliance is headquartered in San Ramon, California. The DASH7 Alliance itself

does not make, manufacture or sell DASH7-enabled products but owns the DASH7 trademark.

Manufacturers may use the trademark to brand certified products that belong to a class of wireless

sensor networking devices based on the ISO 18000-7 standard.

DASH7 wireless sensor networking technology is operating in the license-free

433.92 MHz spectrum. DASH7 has multi-kilometer range, multi-year battery life, sensor and

security support, tag-to-tag communications, and a maximum bitrate of 200kbit/s. DASH7 devices

operate on a single global frequency and are interoperable “out of the box” regardless of application

and by design do not require cumbersome application profiles. DASH7 is the brand given to the

ISO 18000-7 standard for active RFID similar to the use of the WiFibrand for IEEE

802.11 communications.

The DASH7 Alliance today consists of four main working groups overseen by a board of

directors. There are a number of subgroups within the working groups.

The working groups are as follows:

3.7.1. Technical Working Group:

Receives end user requirements from the Outreach Working Group and begins to translate them

into technical specifications for submittal to ISO. Within the TWG, there are also a number of

subgroups including security and low frequency wakeup.

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3.7.2. Test and Certification Working Group:

Co-ordinates the Alliance's efforts around conformance and interoperability testing, as well as

the actual granting of DASH7 Certified status to submitted products that passes the DASH7 Test

and Certification process.

3.7.3. Standards and Regulatory Working Group:

Co-ordinates the submittal of specifications to ISO and the subsequent voting by members in

ISO. The SRWG also coordinates the Alliance's interactions with various regulatory bodies around

the world and liaison relationships with other standards and industry consortia.

3.7.4. Outreach Working Group:

Gathers end user requirements for submittal to the outreach working group and also leads all

public outreach for the Alliance. Within the OWG, there are also a number of subgroups including

automotive, container sensing and security, building automation and smart energy, and government

affairs.

3.8. ISO/IEC 18000-7 Air interface standard:

ISO/IEC 18000-7:2009 defines the air interface for radio frequency identification (RFID)

devices operating as an active RF tag in the 433 MHz band used in item management applications.

It provides a common technical specification for RFID devices that can be used by ISO technical

committees developing RFID application standards.

ISO/IEC 18000-7:2009 is intended to allow for compatibility and to encourage inter-operability

of products for the growing RFID market in the international marketplace. ISO/IEC 18000-7:2009

defines the forward and return link parameters for technical attributes including, but not limited to,

operating frequency, operating channel accuracy, occupied channel bandwidth, maximum power,

spurious emissions, modulation, duty cycle, data coding, bit rate, bit rate accuracy, bit transmission

order, and, where appropriate, operating channels, frequency hop rate, hop sequence, spreading

sequence, and chip rate. ISO/IEC 18000-7:2009 further defines the communications protocol used

in the air interface.

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4. APPLICATIONS

4.1. Commercial Applications:

Similar to other networking technologies that began with defense sector

(e.g. DARPA funding the Internet), DASH7 is similarly suited to a wide range of applications in

development or being deployed including:

1. Building Automation, Access Control, Smart Energy:-

DASH7's signal propagation characteristics allow it to penetrate walls, windows, doors, and

other substances that serve as impediments to other technologies operating at 2.45 GHz, for

example. For smart energy and building automation applications, DASH7 networks can be

deployed with far less infrastructure than competing technologies and at far lower total cost of

ownership.[4]

2. Location-Based Services:-

DASH7 is being used today for developing new location-based services using a range of

DASH7-enabled devices including smartcards, tickets, watches and other conventional products

that can take advantage of the unique small footprint, low power, long range, and low cost of

DASH7 relative to less practical and high-power wireless technologies like WiFi or Bluetooth.

Using DASH7, users can "check in" to venues in ways not practical with current check-in

technologies like GPS, that are power-intensive and fail indoors and in urban environments.

Location-based services like Foursquare, Novitaz, or Facebook can exploit this capability in

DASH7 and award loyalty points, allow users to view the Facebook or Twitter addresses of those

walking past, and more.

3. Mobile advertising:-

DASH7 is being developed for "smart" billboards and kiosks, likewise "smart" posters that can

be ready from many meters (or even kilometers) away, creating new opportunities for both tracking

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the effectiveness of advertising spend but also creating new e-commerce opportunities. DASH7's

potential to automate check-ins and check-outs provides essential infrastructure to location-based

advertising and promotions.

4. Automotive:-

DASH7 is increasingly seen as the next-generation tire pressure monitoring system given its

operation at the same frequency (433 MHz) as nearly all proprietary TPMS systems today. DASH7-

based TPMS will provide end users with more accurate tire pressure readings, resulting in greater

fuel economy, reduced tire wear and tear, and greater safety.[7]

DASH7 products are also being

designed and used for other automotive applications like supply chain visibility.

5. Logistics:-

DASH7 is being used today for tracking the whereabouts of shipping containers, pallets, roll

cages, trucks, rail cars, maritime vessels, and other supply chain assets, providing businesses with

unprecedented visibility into their everyday operations. Also: cold chain management (vaccines,

fresh produce, cut flowers, etc.), whereby DASH7 is used for monitoring the in-transit temperature

and other environmental factors that can impact the integrity of sensitive products.

Since NATO militaries continue to deploy DASH7 infrastructure, defense suppliers (see Classes

of Supply) are expected to also deploy DASH7 infrastructure given NATO requirements for supply

chain visibility beyond just physical boundaries of a given military and deep into the supply chains

of an array of suppliers around the world. DASH7 is expected to be adopted similar to the

way barcoding was rapidly adopted by commercial companies, many of whom are also defense

suppliers, following the LOGMARS barcoding mandate from the U.S. Department of Defense in

1981.

4.2. Defense Applications:

DASH7 is being used extensively by the U. S. Department of Defense (DoD) and other

militaries. In January 2009, DoD awarded a $429 million contract for DASH7 devices, making it

one of the largest wireless sensor networking deployments in the world, especially when combined

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with DoD's $500 million + installed base of non-DASH7 infrastructure which DoD is upgrading to

DASH7.

Commenting on the U.S. Department of Defense's move to an RFID III multi-vendor contract

earlier this year, Lt. Col. Pat Burden, the DoD's Product Manager Joint-Automatic Identification

Technology, stated, "This is a significant milestone for DoD in that this migration will not only give

DoD and other Federal agencies' customers best-value solutions at competitive prices, but it moves

us to ISO 18000-7:2008 compliant products, thus broadening interoperability with DoD and our

coalition partners."

NATO military forces are required to interoperate with DoD's DASH7 network and are required

to deploy interoperable infrastructure. All NATO militaries are deploying or in the process of

deploying DASH7 infrastructure.

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5. DEVOLEPER SUPPORT

5.1. Open Tag:

DASH7 developers benefit from the open source firmware library called Open Tag, which

provides developers with a "C"-based environment in which to develop DASH7 applications

quickly. So in addition to DASH7 (ISO 18000-7) being an open source, ISO standard, Open Tag is

an open source stack that is quite unique relative to other wireless sensor networking (e.g. ZigBee)

and active RFID (e.g.[10]

proprietary) options elsewhere in the marketplace today.

Current versions of Open Tag use the open source Open Tag License.

Open Tag is a very purpose-built OS that offers a low level radio driver, PHY & MAC control

system, event and session manager (OS-like), network protocols (M2NP, M2DP, M2AdvP) routing,

raw data, group synchronization transport protocols (M2QP) query / data acquisition, data transfer

file system read, write, create, delete, etc. C API library functions (Programming apps in C on the

same device), Serial API(s) Client-Server (Communicating the apps via another device).

All versions of Open Tag are available as a git repository via Source forge & Git Hub, and some

versions are available as archives.

5.2. Semiconductor Industry Support:

DASH7 developers receive support from the semiconductor industry including multiple options,

with Texas Instruments, ST Microelectronics, Melexis, Semtech and Analog Devices all offering

DASH7 hardware development kits or system-on-a-chip products.[11]

Texas Instruments also joined

the DASH7 Alliance in March 2009 and announced their CC430 system-on-a-chip product for

DASH7 in December 2009.[12]

Analog Devices also announced their ADuCRF101 single chip

solution for DASH7 in November 2010.

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One semiconductor industry approach is the combination of DASH7 with MEMS sensing

products:

"We strongly believe that the next big wave in sensors will be driven by the combination of the

sensing function with wireless transmission – and ISO 18000-7 is the right solution for security and

asset monitoring applications," said Benedetto Vigna, group vice president and general manager of

the MEMS and Healthcare Product Division at STMicroelectronics in the company's

announcement. "The Smart Web-Based Sensor HDK is a best-in-class development platform that

will help the adoption of wireless sensors across the industry."

ST Microelectronics announced the beta version of its DASH7 Smart Sensor developers kit in

May 2009 in collaboration with Arira Design.

Another semiconductor industry approach focuses on automotive:

"There is a great potential for DASH7 technology in the automotive area," said Gilles Cerede,

Product Line Manager for Wireless Automotive & Sensing at Melexis. "We see a perfect fit

between DASH7 features and performance and the requirements of wireless safety applications. For

example the ultra-low power consumption matches the TPMS life time constraints, while the

"multi-kilometer" communication range is perfectly suited for car-to-car and car-to-infrastructure

applications. Last but not least, DASH7 is compatible from a frequency point of view with existing

Remote Keyless Entry systems."

DASH7 is also seen as a complement to 13.56 MHz NFC (Near Field Communications), where

both technologies can "co-exist" in the same silicon with only minor adjustments to the NFC silicon

to accommodate DASH7.

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5.3. Developer Test Tools and Certification Program:

The DASH7 Alliance, through its partnership with the world renowned MET Laboratories,

Inc. offers developers a complete set of test tools to allow for early testing of new DASH7 devices

to ensure early in the development process that they will ultimately pass DASH7 Certified

interoperability testing. Once products are completed, DASH7 Alliance members can access MET

Laboratories test and certification facilities and, upon successfully completing certification testing,

those members may use the "DASH7 Certified" logo on products that have successfully completed

Alliance testing procedures conducted by MET.

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6. ISM Band

The industrial, scientific and medical (ISM) radio bands are radio bands (portions of the radio

spectrum) reserved internationally for the use of radio frequency (RF) energy for industrial,

scientific and medical purposes other than communications.[1]

Examples of applications in these

bands include radio-frequency process heating, microwave ovens, and medical diathermy machines.

The powerful emissions of these devices can create electromagnetic interference and disrupt radio

communication using the same frequency, so these devices were limited to certain bands of

frequencies. In general, communications equipment operating in these bands must tolerate any

interference generated by ISM equipment, and users have no regulatory protection from ISM device

operation.

Despite the intent of the original allocation, in recent years the fastest-growing uses of these

bands have been for short-range, low power communications systems. Cordless phones, Bluetooth

devices, NFC devices, and wireless computer networks all use the ISM bands.

The ISM bands are defined by the ITU-R in 5.138, 5.150, and 5.280 of the Radio Regulations.

Individual countries' use of the bands designated in these sections may differ due to variations in

national radio regulations. Because communication devices using the ISM bands must tolerate any

interference from ISM equipment, unlicensed operations are typically permitted to use these bands,

since unlicensed operation typically needs to be tolerant of interference from other devices anyway.

The ISM bands do have licensed operations; however, due to the high likelihood of harmful

interference, licensed use of the bands is typically low. In the United States of America, uses of the

ISM bands are governed by Part 18 of the FCC rules, while Part 15 contains the rules for unlicensed

communication devices, even those that use the ISM frequencies.

The ISM bands defined by the ITU-R are:

Frequency range Bandwidth Center frequency Availability

6.765 MHz 6.795 MHz 30 KHz 6.780 MHz Subject to local acceptance

13.553 MHz 13.567 MHz 14 KHz 13.560 MHz

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26.957 MHz 27.283 MHz 326 KHz 27.120 MHz

40.660 MHz 40.700 MHz 40 KHz 40.680 MHz

433.050 MHz 434.790 MHz 1.84 MHz 433.920 MHz Region 1 only and subject to local

acceptance

902.000 MHz 928.000 MHz 26 MHz 915.000 MHz Region 2 only

2.400 GHz 2.500 GHz 100 MHz 2.450 GHz

5.725 GHz 5.875 GHz 150 MHz 5.800 GHz

24.000 GHz 24.250 GHz 250 MHz 24.125 GHz

61.000 GHz 61.500 GHz 500 MHz 61.250 GHz Subject to local acceptance

122.000 GHz 123.000 GHz 1 GHz 122.500 GHz Subject to local acceptance

244.000 GHz 246.000 GHz 2 GHz 245.000 GHz Subject to local acceptance

Regulatory authorities may allocate other parts of the radio spectrum for unlicensed

communication systems, but these are not ISM bands

For many people, the most commonly encountered ISM device is the home microwave

oven operating at 2.45 GHz. However, in recent years these bands have also been shared with

license-free error-tolerant communications applications such as Wireless Sensor Networks in the

915 MHz and 2.450 GHz bands, as well as wireless LANs and cordless phones in the 915 MHz,

2.450 GHz, and 5.800 GHz bands. Because unlicensed devices already are required to be tolerant of

ISM emissions in these bands, unlicensed low power uses are generally able to operate in these

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bands without causing problems for ISM users; ISM equipment does not necessarily include a radio

receiver in the ISM band (a microwave oven does not have a receiver).

In the United States, according to 47 CFR Part 15.5, low power communication devices must

accept interference from licensed users of that frequency band, and the Part 15 device must not

cause interference to licensed users. Note that the 915 MHz band should not be used in countries

outside Region 2, except those that specifically allow it, such as Australia and Israel, especially

those that use the GSM-900 band for cell phones. The ISM bands are also widely used for Radio-

frequency identification (RFID) applications with the most commonly used band being the

13.56 MHz band used by systems compliant with ISO/IEC 14443 including those used by biometric

passports and contactless smart cards.

In Europe, the use of the ISM band is covered by Short Range Device regulations issued

by European Commission, based on technical recommendations by CEPT and standards by ETSI.

In most of Europe, LPD433 band is allowed for license-free voice communication in addition

to PMR446.

Wireless LAN devices use wavebands as follows:

Bluetooth 2450 MHz band

HIPERLAN 5800 MHz band

IEEE 802.11/Wi-Fi 2450 MHz and 5800 MHz bands

IEEE 802.15.4, ZigBee and other personal area networks may use the 915 MHz and 2450

MHz ISM bands.

Wireless LANs and cordless phones can also use frequency bands other than the bands shared

with ISM, but such uses require approval on a country by country basis. DECT phones use allocated

spectrum outside the ISM bands that differs in Europe and North America. Ultra-wideband LANs

require more spectrum than the ISM bands can provide, so the relevant standards such as IEEE

802.15.4a are designed to make use of spectrum outside the ISM bands. Despite the fact that these

additional bands are outside the official ITU-R ISM bands, because they are used for the same types

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of low power personal communications, these additional frequency bands are sometimes incorrectly

referred to as ISM bands as well.

Also note that several brands of radio control equipment use the 2.4 GHz band range for low

power remote control of toys, from gas powered cars to miniature aircraft.

Worldwide Digital Cordless Telecommunications or WDCT is an ISM band technology that uses

the 2.4 GHz radio spectrum.

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7. CONCLUSION

We can conclude that by comprising with other wireless sensor network standard DASH7 has

too many advantages. But we have to improve its data rate by using proper data compression

method.

We can also develop the library for DASH7 on TINY OS.

We see the advantages of DASH7 compare to other standards by using following table:

(Table 2. Comparison chart of wireless networks)

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8. FUTURE SCOPE

1. Preparation of library for accommodating DASH7 on tiny OS.

2. Increase data rate of the signal by using suitable data compression method.

3. Multimedia data transmission using DASH7 standard.

4. Modulation method for data transmitting more efficiently.

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9. REFERANCES

1. Mike McInnis, IEEE P802.15.4f Active RFID System Call for Applications.

http://www.ieee802.org/15/pub/TG4f.htm,21 January 2009.

2. M. Laniel, J.P. Emond, A.E. Altunbas, RFID Behavior Study in Enclosed Trailer/Container for

Real Time Temperature Tracking. UF/IFAS Center for Food, Distribution and Retailing,

Agricultural and Biological Engineering Department, University of Florida, 28 June 2008.

3. M. Petrova, L. Wu, P. Mahonen, J. Riihijarvi. Interference Measurements on Performance

Degradation between Colocated IEEE 802.11g/n and IEEE 802.15.4 Networks. Proceedings of

the Sixth International Conference on Networking, IEEE Computer Society, Washington, DC,

2007.

4. SY Shin, HS Park, S Choi, WH Kwon, Packet Error Rate Analysis of IEEE 802.15.4 under IEEE

802.11b Interference.Seoul, Korea: School of Electrical Engineering & Computer Science,

Seoul National University, 2008.

5. M. Weyn, “Opportunistic seamless localization,” Ph.D. Dissertation, University of

Antwerp, March 2011.

6. Wireless Communication : Wi-Fi, Bluetooth, IEEE 802.15.4, DASH7 by Helen Fornazier,

Aurélien Martin, Scott Messner on 16 march 2012