Friday, March 30, 2007

Rice University work in Wireless Sensor Network Arena

I recently had the opportunity to visit with the Rice University team working on wireless sensor networks. I met with Farinaz Koushanfar and others who under the direction of Richard Baraniuk work on wireless sensor network research. They combed through numerous conference papers to research the applications and find out what software API would make for the most efficient implementation of those applications. The first lesson they found is that most applications described in the conference papers were never actually implemented but in most cases were only simulated.

What should the software API accomplish? The first response was to describe a target node set by a set of characteristics such as geography (e.g. all the nodes on Level 2), functionality (e.g. all the temperature reading nodes), condition (e.g. all the nodes that have full memories), etc.

Also, distances need to be measured in both physical distance and the number of hops to reach the destination. Sometimes, one can program the physical distance into the system while other times, one doesn’t know the exact distance but wants to make several hops (from one unit to the next) to reach the destination.

Since the nodes can move in some applications, it’s important to know where the nodes are right now – so localization is important.

To conserve energy, the software API may want to implement different receive modes. For example, a node can act as an intermediate communicator which simply passes data along, or it could act as an aggregator by collecting data from other nodes, or it could act as an analyzer which applies an algorithm to the collected data.

In a resource-constrained environment like a wireless network, the user needs the ability to adjust the “Level of effort” so he can tradeoff reliability vs. best effort. If the data still does not reach its destination, then some action can be taken such as changing the spreading code, or increasing the signal power.

It’s interesting to note that most applications the Rice team investigated require major reliability.

Finally, the team mentioned the need for a hierarchical API to describe the various classes of devices and levels (i.e. gateways, hubs, and nodes). This gives the user the ability to place the code at the right level to perform the application.


Best regards,
Hall T.

8 Comments:

Blogger ninest123 Ninest said...

ninest123 10.14
burberry handbags, ray ban sunglasses, michael kors outlet online, replica watches, michael kors outlet, louis vuitton, uggs outlet, longchamp outlet, longchamp outlet, polo ralph lauren outlet online, michael kors outlet, uggs on sale, michael kors outlet online, oakley sunglasses wholesale, christian louboutin outlet, longchamp outlet, ugg boots, gucci handbags, uggs outlet, christian louboutin shoes, tory burch outlet, michael kors outlet online, prada handbags, tiffany and co, replica watches, louis vuitton outlet, burberry outlet, ray ban sunglasses, chanel handbags, louis vuitton outlet, louis vuitton outlet, nike air max, nike air max, oakley sunglasses, ugg boots, nike outlet, jordan shoes, oakley sunglasses, prada outlet, cheap oakley sunglasses, louis vuitton, christian louboutin, tiffany jewelry, oakley sunglasses, christian louboutin uk, michael kors outlet store, ray ban sunglasses, polo outlet

Tuesday, October 13, 2015 8:42:00 PM  
Blogger ninest123 Ninest said...

nike free run, coach outlet, burberry pas cher, new balance, polo lacoste, ray ban uk, louboutin pas cher, timberland pas cher, vans pas cher, coach outlet store online, converse pas cher, north face uk, north face, michael kors, jordan pas cher, hogan outlet, true religion jeans, nike blazer pas cher, nike air force, nike air max uk, sac vanessa bruno, air max, nike roshe, coach purses, oakley pas cher, nike tn, true religion outlet, ray ban pas cher, abercrombie and fitch uk, hollister pas cher, sac longchamp pas cher, ralph lauren uk, michael kors pas cher, longchamp pas cher, nike roshe run uk, lululemon canada, nike free uk, michael kors outlet, coach outlet, true religion outlet, guess pas cher, nike air max uk, mulberry uk, nike air max, polo ralph lauren, kate spade, true religion outlet, sac hermes, hollister uk, michael kors

Tuesday, October 13, 2015 8:49:00 PM  
Blogger ninest123 Ninest said...

p90x workout, ralph lauren, vans outlet, mont blanc pens, herve leger, soccer jerseys, hermes belt, north face outlet, babyliss, celine handbags, timberland boots, iphone 6 cases, nike air max, gucci, instyler, mac cosmetics, bottega veneta, mcm handbags, baseball bats, abercrombie and fitch, hollister, chi flat iron, louboutin, asics running shoes, wedding dresses, longchamp uk, vans, ghd hair, nike trainers uk, beats by dre, nfl jerseys, giuseppe zanotti outlet, lululemon, converse outlet, converse, nike air max, oakley, new balance shoes, ray ban, hollister, hollister clothing, nike roshe run, insanity workout, ferragamo shoes, valentino shoes, nike huaraches, north face outlet, reebok outlet, soccer shoes, jimmy choo outlet, nike free, kate spade outlet

Tuesday, October 13, 2015 8:53:00 PM  
Blogger ninest123 Ninest said...

canada goose, thomas sabo, canada goose jackets, canada goose, louis vuitton, swarovski crystal, montre pas cher, louis vuitton, toms shoes, ugg,ugg australia,ugg italia, marc jacobs, wedding dresses, lancel, ugg,uggs,uggs canada, hollister, pandora jewelry, michael kors outlet, canada goose, canada goose outlet, louis vuitton, supra shoes, doudoune moncler, pandora charms, moncler outlet, juicy couture outlet, moncler, moncler, canada goose uk, moncler outlet, louis vuitton, replica watches, links of london, doke gabbana, canada goose outlet, ugg pas cher, michael kors handbags, louis vuitton, moncler, michael kors outlet online, swarovski, barbour uk, juicy couture outlet, pandora uk, ugg, karen millen uk, ugg uk, pandora jewelry, coach outlet, moncler, moncler uk, canada goose outlet, barbour
ninest123 10.14

Tuesday, October 13, 2015 8:58:00 PM  
Blogger Minko Chen said...

uggs outlet
ugg boots
chanel handbags outlet
uggs outlet
fitflops outlet sale
north face outlet
nike free 5
mac cosmetics
hollister canada
wedding dresses uk
north face jackets
ferragamo outlet
christian louboutin shoes
coach outlet
wellensteyn outlet
tods outlet
nike air huarache
swarovski outlet
true religion jeans
ray-ban sunglasses
1211minko

Thursday, December 10, 2015 8:16:00 PM  
Blogger Mie Helal said...




I'm going to highly recommend this web site!
https://decor-ksa.com/
http://caravank.com/factory/
http://caravank.com/for-sale-in-riyadh/
http://caravank.com/withdrawn-for-sale/
http://caravank.com/withdrawal-rooms/

Wednesday, January 04, 2017 4:24:00 AM  
Blogger dalia alaa said...

https://decor-ksa.com/
https://3kary.com/property-status/apartments-for-sale/
https://3kary.com/property-status/apartments-for-rent/

Saturday, January 14, 2017 12:50:00 PM  
Blogger dalia alaa said...

https://3kary.com/property-status/monthly-apartments-for-rent/
https://3kary.com/property-status/apartments-bachelors/
https://3kary.com/property-status/hotel-appartments/
https://3kary.com/property-type/apartments/

Saturday, January 14, 2017 12:50:00 PM  

Post a Comment

<< Home