dash7 vs. bluetooth www.haystacktechnologies.com
“Some company” is whispering thatBluetooth can now do everythingDASH7 can do. We know this to bewrong. This presentation is anattempt to set the record straight.
- Created in 2009 by the dash7 - Created in 1994 by Ericsson alliance, with precursors dating back to 1990 - Struggled for many years to find its market- Mainly used in defense sector but expanding into other - Today the dominant markets technology for cable replacement … more than seven billion sold to-date!
strengths• Long range: 250m (nom), up to 2km • Wireless cable replacement that can provide streaming 1:1 communication• Low power: multi-year battery life • Can support high data rates, ≥1Mbps• Secure: excellent crypto, “cloaking,” and data sandboxing • Established on smartphones, features headsets, some keyboards & mice• Open standard, open source stack • Open standard• Up to 1m location precision using • Version 4.0 introduces “Bluetooth just signal-strength and Low Energy”, a 1-way communications “fingerprinting” subset that provides new market opportunities in toys, gizmos, and• Very inexpensive especially health/fitness devices. • Very inexpensive
weaknesses• Low data rate and burst packet • Data model is flawed, leading to security method are unsuitable for voice, vulnerabilities (e.g. bluesniping). audio, video. • Hugely underutilized: many users never• Not a household name today utilize bluetooth at all. • Very short range, especially indoors:• Unfamiliar networking API: not 1:1 5-10 meters cable-replacement like BT or WiFi, so software developers have a • no two-way communications between learning curve at the beginning. things that are moving • 2-way devices (nearly all bt devices today) are not intended to support multi-year battery requirements. • 1-way devices have privacy issues and can only transfer 49 bytes of data.
Feature comparison 4.0 low energy* Long range X X ✓ Penetrates walls X X ✓ Interacts easily with public networks X X ✓ Uses listen-before-talk X X ✓Supports public-key crypto and secure “sandboxed” X X ✓ ✓ ✓ data environment Multi-year battery X Connects with peerseffortlessly in under two seconds X X ✓ *certain non-smartphone devices can take advantage of a newer “low energy”, lower bandwidth version of bluetooth that extends battery life significantly
10 DASH7 Use Cases That Bluetooth Can’t Touch1. Long range peer-to-peer text messaging2. Phone auto-configuration3. “Smart building” applications4. Next-generation keyless entry5. Defense & homeland security6. Social discovery7. Smart advertising on posters & billboards8. Faster pairing of socket-based wireless (WiFi, Bluetooth)9. Mobile in-store advertising10. Automotive sensors
#1 Start with text-messaging inRF-unfriendly environmentswhere cellular and WiFi areunavailable ... DASH7 provides new in-building communication options in the 433 MHz band, which penetrates walls and “bends” around metal obstacles
Bluetooth uses the overcrowded, short-range 2.4 GHz band. It is blocked by walls or metalobstacles, interferes with WiFi, andcan take what seems like forever to “pair” with another device
#2 Change the Profile of a Handset .... Without “Tapping” (Next gen NFC chips can include DASH7 for less than 10 cents and use the same antenna)• Automatic room-level location awareness• Faster pairing & un-pairing of mobile apps• Improved security and battery-life
Auto-configuring a handset using Bluetooth would require Bluetooth to beoperating at near 100% duty, a significant power drain. The result of Bluetooth- based discovery is several hours reduced battery-life.
#3 Provide new ways of connecting with “things” in an enterprise Smart Energy Metering & Control IT Asset Management Infrastructure Monitoring Parking & Lighting
Bluetooth is not a serious candidate forsmart-building projects, due to its shortrange, poor indoor propagation, lack of ad-hoc networking, and interference problems with modern WiFi networks
Future DASH7 implementations can share antenna and silicon with 13.56 MHz RFID devices, allowing drop-in upgrades to a huge, globally installed base of accesscontrol systems. Bluetooth is inadvisable for secure applications, but even if that were fixed, adding it requires new components and their associated integration costs.
#5: New Military & Homeland Security Apps DASH7 can discreetly and securely send queries to find friendly personnel nearby, and it can enable off-grid P2P messaging apps. (N.B. DASH7 is already used extensively by US DoD)
By comparison, Bluetooth “discovery”requires beaconing every 1 second that cangive away location to the enemy, requires an intermediate server (or a “cloud” lookup), and it has problematic range limitations in urban or wooded environments.
#6 New social discovery Apps DASH7 users can “discover” other Hillary users, what they are listening to, 7 mutual friends the game they are playing, their Listening to “The Rushing Wind” by Enation twitter address, or other rich- data … without requiring an internet lookup
Discovering new friends or things withBluetooth can take minutes, has enormous privacy risks, and requires a-priori knowledge of a common cloud-based service just to work at all. Moreover,existing cloud-based social discovery apps using similar beaconing models have resulted in multiple cases of stalking and sexual assault.
#7 Smarter postersPosters “2.0” Smart & billboardsDASH7 userscan interact with smartposters and billboards at a distance, even while moving
Bluetooth cannot easily interact at adistance or while moving, and getting promotional information from the advertisement is impractical due toBluetooth’s slow, user-intensive, and vulnerable pairing model.
#8 Easy pairing of WiFi/Bluetooth devices Bluetooth and WiFi are so difficult to pair that NFC is already being deployed to assist. With next-gen NFC +DASH7 chips, pairing assistance can be used without requiring “tapping”
Survey says: “tapping” an NFC-assisted Bluetooth device to initiate pairing is non-conventional behavior that most of us will forget to use.
#9 Mobile in-store advertising D Location! Engine! Advertising! Engine!DASH7 access point DASH7 reference tag DASH7 can locate retail customers within 1m, enabling offers and coupons at the point- of-purchase decision. DASH7 can use sub-$10 battery-powered reference tags to outfit a venue Hypothetical Handset cheaply and quickly. User
D Location! Engine! Advertising! Engine! Bluetooth location systems only can provide suitable accuracy in a model where you are basically being tracked: your phone is constantly emitting unsecured beacons. Plus, the location nodes are mains-powered, typ. $150 each, and the location network itself is likely Hypothetical to degrade in-store WiFi networks. Handset User
#10 Automotive sensing The 433 MHz band used by DASH7 is already deployed in automotive applications for tire-pressure monitoring (TPMS), keyless entry, and others. DASH7 can become a single standard used for these applications and also new ones.
Bluetooth operates in the 2.4GHz band, which cannot reliably communicate around metal or other automotive components. Apart from “hands-free”applications, it is not a serious candidate for automotive applications.
So just to summarize:1. Long range peer-peer messaging X ✓2. Phone auto-configuration X ✓3. “Smart building” applications X ✓4. Next-generation keyless entry X ✓5. Defense & homeland security X ✓6. Social discovery X ✓7. Smart posters & billboards X ✓8. Faster pairing of WiFi, Bluetooth X ✓9. Mobile in-store advertising X ✓10. Automotive sensors X ✓
before we go, a final word on security Supports AES 128 crypto ✓ ✓ Supports channel hopping ✓ ✓ Can be made invisible to non-approved devices X ✓ Supports listen-before-talk X ✓ Enables privacy (discovery beacons not X ✓ ✓ required) Has encrypted, “sandboxed” data environment X Wavelength is long enough that “sniping” is impractical X ✓
Some key takeaways:1. A single wireless technology cannot do everything we need (The reason your phone already has multiple radios, for example)2. Bluetooth became successful when it focused on what it did really well: cable replacement for wireless headsets.3. End users lose when industry tries to force its existing technologies to perform strange contortions, when a vastly superior technology is available for little or no additional cost (e.g. touchscreen phones, color television)4. DASH7’s use cases complement Bluetooth use cases and can even make Bluetooth pairing better. Bluetooth has a continued role to play in cable replacement for high bandwidth, short range communications. BLE has a great opportunity, as well, for the markets it was designed to meet: health, fitness, lifestyle, and toys.5. DASH7 should be part of planning, today, for products that require a combination of long range/low cost/low power/low bandwidth. Also as a “Plan B” for companies experimenting with BLE or NFC technologies.
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