Re: [Ans-research] Network Scalability

["[e-mail]" <[e-mail]>]

Hi Foo Yee,

Here is my take on your question. 

The importance of being able to determine the scalability of a method is
in the fact that different methods may scale differently; ; i.e., RELATIVE 
SCALABILITY. Although a network using a method may not be ABSOLUTELY
SCALABLE, one method may be *more* scalable than another.

You are right in saying that the scalability of a method depends on the
network - this has been "captured" in the ENVIROMENTAL PARAMETERS in [1].
For any comparison to be meaningful, one has to be clearly specify the
ENVIROMENTAL PARAMETERS and the comparison has to be made with the 
parameters being substantially equal.

Zygmunt.
==-=-==-==
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Prof. Zygmunt J. Haas                    http://people.ece.cornell.edu/haas 
Wireless Networks Laboratory		 http://wnl.ece.cornell.edu
School of Electrical Engineering         
Cornell University			 tel: [phone]
323 Frank Rhodes Hall			 fax: [phone]
Ithaca, NY 14853			 e-mail: [e-mail]
U.S.A                             
	WNL web page: http://wnl.ece.cornell.edu
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On Sun, 7 Dec 2003, Foo Yee Loo wrote:

> Dear all,
> 
> Greetings. I am new in the field of ad hoc network, so please pardon me for
> asking a naive question: what is the importance of finding out the
> scalability of ad hoc network?
> Arpacioglu et al. in [1] have pointed out the importance of knowing the
> scalability of the methods in use in an ad hoc network, as allowing us to
> see which method is more scalable. But scalability of a method is not the
> scalability of a network. Santivanez et al. in [2] have mentioned that we
> can know which type of network (purely ad hoc, hybrid, etc.) scales better
> than the other. However, isn't the choice of network type should depend on
> the usage scenario instead of scalability? Various usage scenarios have been
> summarized by Yang et al. in [3].
> Santivanez et al. also mentioned about the possible desire of knowing
> whether a network is scalable in [2]. However, according to [1], absolute
> scalability of a method may not be possible in many situations. If any
> method is unlikely to be absolutely scalable, is it likely that a network is
> absolutely scalable? If the answer is not, then what is the importance of
> knowing the scalability of ad hoc network?
> 
> [1] Arpacioglu, Small, and Haas, "Notes on scalability of wireless ad hoc
> networks", Internet draft, work in progress, 2003.
> [2] Santivanez, McDonald, Stavrakakis, and Ramanathan, "On the scalability
> of ad hoc routing protocols", IEEE INFOCOM'02, New York, June 2002.
> [3] Yang, Conner, Guo, Hazra, and Zhu, "Common wireless ad hoc network usage
> scenarios", Internet draft, work in progress, 2003.
> 
> Thank you for reading.
> 
> Regards,
> Foo Yee Loo
> Info. & Comm. Eng. Dept.
> Grad. Sch. of Info. Sci. & Tech.
> Univ. of Tokyo
> 
> 
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