First Paper About Wireless Sensor Network

I was a Telecomunication Engineering student at an Institute Of Technology in my city. Certainly every student should do some research , this time I took concentration to the field of Wireless Sensor Network ( WSN ). Supervisor recommends to study this paper . And this is the first paper that I learned.

On Energy for Progressive and Consensus Estimation in Multihop Sensor Networks ( click here )

Information about this paper according my understanding is :

1) Author Name: Yi Huang and Yingbo Hua. ( you can click this picture for larger ).

2) Title Of Paper : " On Energy for Progressive and Consensus Estimation in Multihop Sensor Networks ".

3) Source : IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 59, NO. 8, AUGUST 2011.

( This is screen shoot on IEEE website )

4) Summary Of Reported Research :

Using the exact energy model and taking advantage of diverse channel gains of multiple subchannels, this algorithm is more general and yields more energy saving than the previous algorithm developed

in previous paper. 

Y. Huang and Y. Hua, “Energy planning for progressive estimation in multihop sensor networks,” IEEE Trans. Signal Process., vol. 57, no. 10, pp. 4052–4065, Oct. 2009.

The other aspect is an in-depth study of the energy cost for consensus estimation in broadcast multihop sensor networks. Insights have been developed into the energy cost in terms of transmission energy, quantization bits allocation and fusion rule.

5) Strength Of Invention :

Author said that result  in this paper are much stronger than that in

Y. Huang and Y. Hua, “Energy planning for progressive estimation in multihop sensor networks,” IEEE Trans. Signal Process., vol. 57, no. 10, pp. 4052–4065, Oct. 2009.

because use the exact channel energy model (not an upper bound) and optimize both quantization and transmission bit allocation (not just quantization bit allocation).

6) Weakness :

>> What author said is:

This Paper explain about three basic architecture of WSN.

First explain about " Single Hop with Fusion Center". In this architecture, every nodes transmitt data directly to Fusion Center. Fusion Center is could be define with Base Station. Weakness in this architecture is when distance between nodes to Fusion Center is to far. This will make wastefull energy.

Second explain about " Multi Hop with Fushion Center ". In this architecture, data packet can be relayed from one sensor to another until it reaches a fusion center. The Multi Hop architecture is generally more efficient in energy than the Single Hop architecture. Weakness in this architecture is when data packets are not compressed as they hop towards the fusion center, the sensors near the Fusion Center can be over hard work,

Third explain about " Broadcast Multi Hop ". In this architecture, every nodes broadcast their data to every neighbour which possible to receive, Ussualy this architecture using Consensus Estimation. Weakness in this architecture is Without the knowledge of the network topology or some global statistical information, a node in the network cannot know when an updated information is reliable enough.

>> What my understanding is:

I think author try to explain weakness about Consensus Estimation in Broadcast multihop architecture. And propose to use Progressive Estimation.

7) Limitation:

In this paper, author explain the energy cost for communication in WSN by jointly considering networking architecture, data fusion method and channel energy model.

furthermore develop generalized energy planning algorithm for progressive estimation in multihop WSN with fusion center.

And the last, author explain about energy cost for consensus estimation in a broadcast multihop WSN subject to a pre-given performance. This allows a comparison between progressive estimation and consensus estimation in terms of energy cost.

How about me ? I think this is paper which difficult to learn for me. But i've got a lot of important learning from this paper.