Peter Pham | 1 Nov 2005 01:50
Picon

Re: opnet simulation of wlan

Item Type: Appointment
Begin time: Tue, 01 Nov 2005 10:00 pm +1050
Duration:   1 Hour
Location:   

Hi

>From my memory, when a packet arrives it will create a stream interrupt. This interrupt is predefined in
OPNET. Read the interrupt section of the manual.

Regards,
Peter Pham

-----Original Message-----
From: "remith m  rajan" <remithrajan <at> rediffmail.com>
To: "manet" <manet <at> ietf.org>
Date: 31 Oct 2005 17:55:02 -0000
Subject: [manet] opnet simulation of wlan

  
i want to know in opnet as we can set the self interrupts through self interupting procedure how can i set the
stream interrupts, i am notable to understand what causes an strem interrupt to activated. 
as in wlan we are checking whether it is a stream interrupt and if it is then is this a data or ack , but how this
stream interrupts is setted

thanx in advanced
remith. 

(Continue reading)

badis | 1 Nov 2005 10:18
Picon

Re: opnet simulation of wlan

Hi remith ;==)

 you can use for example the following macro definition for
Packet_Arrival:

#define Packet_Arrival (op_intrpt_type () == OPC_INTRPT_STRM)

The Packet_Arrival condition compares the delivered interrupt type with
the OPNET predefined symbolic constant OPC_INTRPT_STRM, which indicates a
stream interrupt.

To define an interrup self, you can use for example the following macro
definition for Action1 :

#define Action1 (op_intrpt_type () == OPC_INTRPT_SELF)

If you have many interrup self in your process, you can make a difference
between them with op_intrpt_code ().

Best regards

Hakim.

>
> i want to know in opnet as we can set the self interrupts through self
> interupting procedure how can i set the stream interrupts, i am notable to
> understand what causes an strem interrupt to activated.
> as in wlan we are checking whether it is a stream interrupt and if it is
> then is this a data or ack , but how this stream interrupts is setted
>
(Continue reading)

Franca Delmastro | 2 Nov 2005 08:27
Picon
Favicon

[WoWMoM 2006] CFP: The 7th IEEE International Symposium ona World of Wireless, Mobile and Multimedia Networks

We apologize in advance if you receive multiple copies of this CFP.
----------------------------------------------------------------------

CALL FOR PAPERS
       
The 7th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WOWMOM 2006)

June 26-29, 2006, Niagara-Falls/Buffalo, New York, USA


Sponsored by IEEE Computer Society, IEEE TCCC and Univ. of Texas at Arlington

**** Submission Deadline --- November 19, 2005 ****
----------------------------------------------------------------------

The emergence of broadband wireless access standards, such as 3G/UMTS, 802.16, 802.11a/g and UWB, offers exciting new possibilities for delivering rich multimedia content over wireless networks. The delivery and transport of rich multimedia in such wireless environments, including sensor and mesh networks, requires innovation and advances in better MAC and routing protocols, session establishment and signaling architectures, QoS provisioning and adaptive transmission techniques, autonomic network management capabilities and middleware frameworks, among others.

*** Topics of Interest***

The IEEE WoWMoM 2006 technical program committee is soliciting papers addressing the research challenges and advances towards a world of wireless, mobile, and multimedia pervasive communications. Papers must present original and previously unpublished work, validated by experimentation, simulation, or analysis. Practical experiences and experimental efforts, including submissions from industry, are also welcome. Topics of interest include, but are not limited to, the following:
- System prototypes and experiences
- QoS for voice and video in wireless networks
- Middleware support for QoS provision
- Differentiated services for wireless multimedia
- IP-based wireless multimedia services
- Multimedia session signaling in wireless environments
- Networking services for pervasive systems
- Multicasting and broadcasting issues
- Handoff and mobility management
- Seamless internetworking
- Energy-efficient protocols and power management
- Network management and troubleshooting- IP-based mobile networks
- Context-aware wireless multimedia application
- Location mechanism and services
- Wireless BAN, PAN, LAN, and MAN
- Ad hoc and sensor networks
- Wireless mesh networks
- Vehicular wireless networks
- Third and fourth generation systems
- Wireless security and dependability
- Content Management and Distribution
- Pricing and billing
- Modeling and Performance evaluation

Two types of papers will be considered. "Full Papers" must present original, previously unpublished, complete work, validated by experimentation, simulation, or analysis. "Position Papers" must be visionary, innovative and forward-looking, and offer new perspectives on future research directions. Only a limited number of slots will be available for position papers that will be reviewed primarily for relevance and originality.


***Submission Dates and Guidelines****
Submission Deadline:            November 19, 2005.        
Acceptance Notification:        February 21, 2006
Camera Ready Due:            March 17, 2006.      
Submitted manuscripts should adhere to the IEEE double-column  standard format, except the font size, which must be Times Roman 11pt (or greater). Authors should use only standard fonts, i.e.,  Times Roman, Courier, Symbol, and Helvetica, or equivalent. For full papers, the maximum length of the manuscript is 12 pages. For "position" papers, the maximum length of the manuscript is
6 pages. These limits include figures, appendix, bibliography, etc. Papers that will be significantly exceed this limit will be automatically rejected.

**Contact Details****
For any questions or clarifications, please contact either of the TPC Chairs below:
     Marwan Krunz, Univ. of Arizona, USA  (krunz <at> ece.arizona.edu)
     Archan Misra, IBM Research, USA     (archan <at> us.ibm.com)
       
For more information, please visit http://ieee-wowmom.cse.buffalo.edu/
 
************************************************************
Franca Delmastro
Pervasive Computing & Networking Lab. (PerLab)
 
IIT- National Research Council
via G. Moruzzi,1
56124 Pisa, Italy
phone: +39 050 3152407 (direct)
********************************************************
_______________________________________________
manet mailing list
manet <at> ietf.org
https://www1.ietf.org/mailman/listinfo/manet
Fan Bai | 2 Nov 2005 17:10
Picon

Another question regarding channel model in highly mobile environment

Hi, Joe, and other colleagues, 
 
I am also looking at a very tricky question: what is the channel model for highly mobile environment (i.e. the vehicle-to-vehicle communication on freeway and local streets in the metropolitan area)?
 
Obviously, the open space model does not provide a good approximation for such environment. My data sets collected from the field test also suggested that Rayleigh fading or two-ray model also do not work well in such a complex environment. I am still looking at the possibility of using Rican fading to explain my data.
 
I am wondering whether there is some existing channel model (including shadowing and fading, especially the fading caused by delay spread and Doppler effect) for such environment? How wireless communication PHY layer experts approach this problem? As a side word, I am not sure whether the model used in cellular system is working here or not, because both wireless transmitter and wireless receiver are highly mobile in vehicle-to-vehicle communication while at least the Base Station is stationary in cellular system. 
 
Any comments and suggestions, or links, books and papers are highly appreciated. Thanks for your comments in advance!
 
regards,
Fan  
 
 
 
 
 
 
 
 
 
 
 
 
 
Chris Yao wrote:

> hi,
>
> in wireless networks, based on the received Received Signal Strength
> Indicator (RSSI), a node can estimate its distance to the beacon node.
>
> could someone point out some related articles about how to estimate
> the distance? what popular theory/emperical RF models have been used?

Like so many things, this is an easy question to ask and a difficult one
to answer.  In fact, you can't measure distance directly, but you can
measure path loss and estimate distance based on that.  The problem is
that in practice there is typically a wide statistical variance on path
loss vs. distance.

I would recommend Ted Rappaport's book "Wireless Communications" for a
review of the effects typically encountered in the wireless environment
and some models that address them.

We begin by assuming you know the transmit power.  Perhaps this is
obvious, but if you don't know this then it is impossible to estimate
the distance based on receive power.  You must also know the gain of
both the transmit and receive antennas.

The most obvious model is the free space transmission model.  It is only
accurate in free space ( i.e. outer space), you can find it by searching
on "Friis Transmission formula".  Beyond that, modeling indoors and
outdoors tends to be very different.

In typical terrestrial propagation environments the Friis formula
doesn't apply because of absorbtion, reflections, etc..  Cellular
networks typically use the "Hata-Okumura Model," in planning, which is
an empirical model.

NIST in Boulder has done extensive research on modeling the indoor
propagation environment.  Here's a  link to a bibliography they've put
online.
http://w3.antd.nist.gov/wctg/manet/wirelesspropagation_bibliog.html

good luck!
joe

>
> Best Regards,
>
> Chris
 
_______________________________________________
manet mailing list
manet <at> ietf.org
https://www1.ietf.org/mailman/listinfo/manet
Joe Carey | 2 Nov 2005 19:23

Re: Another question regarding channel model in highly mobile environment

Fan Bai wrote:

> Hi, Joe, and other colleagues, 
>  
> I am also looking at a very tricky question: what is the channel model 
> for highly mobile environment (i.e. the vehicle-to-vehicle 
> communication on freeway and local streets in the metropolitan area)?
>  
> Obviously, the open space model does not provide a good 
> approximation for such environment. My data sets collected from the 
> field test also suggested that Rayleigh fading or two-ray model also 
> do not work well in such a complex environment. I am still looking at 
> the possibility of using Rican fading to explain my data.
>  
> I am wondering whether there is some existing channel model (including 
> shadowing and fading, especially the fading caused by delay spread and 
> Doppler effect) for such environment?

As far as I know, there is no general consensus on any model fitting the 
data especially well.  In fact, my impression is quite the opposite: no 
model is known to be good in all environments.

Your "highly mobile" environment could be different depending on several 
factors, including the reflections from buildings and absorbtion by 
foliage.  These will be different depending on urban vs. suburban 
environments.  Recent data taken by the MIT roofnet team showed very 
little correllation between distance and path loss for their 
environment, and they speculated the cause was that there was a wide 
variation in heights of the transceivers.  I would expect that hills 
would dramatically affect your propagation model.

With respect to doppler shift, the 802.11 cards typically used in ad-hoc 
networking experiments were not designed to track significant doppler 
shift, but some have been shown empirically to work well. 

> How wireless communication PHY layer experts approach this problem?

They continue to research it ;)  This is fertile ground.  Unfortunately, 
it's an unbounded problem - you can never be sure when you've reached a 
final conclusion.

> As a side word, I am not sure whether the model used in cellular 
> system is working here or not, because both wireless transmitter and 
> wireless receiver are highly mobile in vehicle-to-vehicle 
> communication while at least the Base Station is stationary in 
> cellular system. 
>  

The cellular model is a good starting point, but it can certainly be 
improved upon.  Besides the mobility aspect you mention, the cellular 
waveform is typically relatively narrow (~ 1.25 MHz for CDMA, despread 
to 8 kbps) compared with the 802.11 band (22 MHz waveform, despread to 1 
MBit/sec at the lowest data rate).  IS-95 CDMA, for example, explicitly 
uses a RAKE receiver and power control to manage the awful fading channel.

 I know several companies have done internal research that they guard as 
proprietary information.  Here is a paper the MIT team published that 
was for a static system:

http://pdos.lcs.mit.edu/~rtm/papers/p442-aguayo.pdf

> Any comments and suggestions, or links, books and papers are highly 
> appreciated. Thanks for your comments in advance!
>  
> regards,
> Fan  
>  
>  
bdp27 | 2 Nov 2005 20:37
Picon
Favicon

MAODV

Greetings Manet List,

I've been working with getting a stable multicast routing protocol running on the Linux 2.6 kernel. I've
come across MAODV, which seems to be a usable choice, but it is no longer supported and only appears to work
with versions of AODV that cannot use the 2.6 kernel. Thus, has there been any work done to migrate this to
the 2.6 kernel or are there other alternatives that work well? Thank you for your replies.

Brian Pyles
Drexel University           bdp27 <at> drexel.edu
Phildadelphia, PA 19104
Moustafa Youssef | 3 Nov 2005 03:40
Picon
Favicon

Final CFP: IEEE Workshop on Dependability and Security in Sensor Networks and Systems

(Our apologies if you receive multiple copies of this CFP)

-------------------------------------------------------------
                   Call for Papers
       Second IEEE Workshop on Dependability and Security in
                    Sensor Networks and Systems
                            (DSSNS'2006)
                        http://www.dssns.org
                        In conjunction with
              2nd NASA/IEEE Systems and Software Week
        30th NASA/IEEE Software Engineering Workshop (SEW'2006)
            Columbia, Maryland, USA ~ April 24-28, 2006

Recently, there has been a growing interest in the potential use
of networked sensors in applications such as smart environments, 
disaster management, combat field reconnaissance, and security 
surveillance. While the initial view of the community was that 
networked sensors will play a complementary role that enhances 
the quality of these applications, recent research results have 
encouraged practitioners to envision an increased reliance on sensor 
networks and systems (SN&S) in such critical and sensitive 
applications. Therefore to realize their potential, necessary 
dependability and security (D&S) measures have to be 
incorporated in the design and during the operation of SN&S. 
Dependability is usually specified using attributes like reliability, 
survivability, safety, maintainability, and availability in presence 
of failure, while security is specified by attributes like integrity, 
authenticity, confidentiality, and availability in presence of 
attacks. D&S services accomplish tasks for attack and
failure prevention, detection and response. The scope of D&S 
services may span the deployed sensors to command nodes 
and likely beyond. It also involves D&S support at, and 
cross-cutting, the protocol stack layers from physical to 
application.

Achieving dependability and security in SN&S will require 
non-conventional mechanisms due to many factors including: 
(1) sensors are significantly constrained in the amount of 
available resources such as energy, storage and computation; 
(2) sensors are expected to be deployed in very large numbers 
in normal as well as harsh/hostile environments; (3) sensor 
networks suffer from structural weakness and limited physical
protection, and (4) localization of impact is complicated due 
to the un-tethered nature of SN&S and of the potential 
attackers. In addition, D&S requirements may vary according
to mission defined over a multi-dimensional context, such 
as field of deployment (e.g., hostile versus friendly), type of 
application (e.g., monitoring, tracking, data collection), mode 
of operation (e.g., normal, exception, post-event recovery), 
and time.

This workshop will foster a forum for discussing and presenting 
recent research results on dependability and security in SN&S. 
Topics of interest include, although not limited to, the following:

- Fault and intrusion-tolerant architectures, middleware and operational
models 
- Robust routing, storage, and processing of sensed data
- D&S architectures, protocols and tools
- Vulnerabilities, attacks and countermeasures
- Monitoring and evaluation techniques
- Robust clustering techniques
- Self-awareness and context-awareness 
- Resilient virtual infrastructures
- Autonomic and adaptive D&S support.
- Formal representation and verification of D&S properties
- Network inference support for D&S
- Quality of service provisioning
- Models, metrics, and measurements for D&S
- Privacy-aware D&S services
- Testbeds, simulation and visualization 
- Agent-based D&S management 
- SN&S support for D&S in larger information grids
- SN&S application development environments

Submission Guidelines
---------------------
Papers should contain original material and not be previously
published, or currently submitted for consideration elsewhere. 
The manuscript should not exceed 20 single-column 
double-space pages in PDF format, font size 11 or larger. 
The first page should include title, authors' contact information, 
abstract and five keywords. 

Please e-mail (subject: DSSNS 2006) the paper as an attachment
in PDF format to: 

submission <at> dssns.org

The e-mail should include title, authors, and the corresponding author's
contact information.

Important Dates
----------------
Submission deadline:	November 7, 2005
Decision notification:	December 20, 2005
Final manuscript due:	January 20, 2006

The accepted papers will appear in a proceedings published by IEEE.
The best paper will be recognized and selected papers will be invited to

a Special Issue of the Journal of Ad Hoc and Sensor Wireless Networks. 

Workshop Co-Chairs
-------------------
Mohamed Eltoweissy
Virginia Tech, USA
E-mail: toweissy <at> vt.edu 

Mohamed Younis
University of Maryland Baltimore County, USA
E-mail: younis <at> csee.umbc.edu 

Publicity Co-Chairs
--------------------
Denis Gracanin
Virginia Tech, USA
E-mail: gracanin <at> vt.edu

Moustafa Youssef
University of Maryland at College Park, USA
E-mail: moustafa <at> cs.umd.edu 

Program Committee
------------------
Farooq Anjum, Telcordia & U. of Penn, USA
David Carman, Johns Hopkins U.– Applied Physics Lab, USA
Ing-Ray Chen, Virginia Tech, USA
M. Nazih Elderini, Alexandria U., Egypt
Deborah Frincke, Pacific Northwest National Lab and U. of Idaho, USA
Ahmed Helmy, University of Southern California, USA
Sushil Jajodia, George Mason U., USA
Shivakant Mishra, U. of Colorado, USA
Peng Ning, North Carolina State U., USA
Cristina Nita-Rotaru, Purdue U., USA
Stephan Olariu, Old Dominion U., USA
David Simplot-Ryl, U. Lille, INRIA Futurs, France
Mani B. Srivastava, U. of California – Los Angeles, USA
John A. Stankovic, U. of Virginia, USA
Ivan Stojmenovic, U. of Ottawa, Canada
Gene Tsudik, U. of California-Irvine, USA
Cliff Wang, Army Research Office, USA
Stephen D. Wolthusen, Fraunhofer-IGD, Germany
Albert Zomaya, U. of Sydney, Australia
didac mediavilla | 3 Nov 2005 17:11
Picon

Nist-Dymo protocol

Apologies if this is not the right forum for this message

I'm a student of telecomunication in Spain (UPC). I'm studing dymo
protocol to realease the final project, and I have one question about
it.

I would like to know if the version exposed in the Internet has worked
correctly to somebody.

My PC has a gentoo distribution, actually the kernel that gentoo is
using is 2.6.9. It has activate Netfilter and all the things that are
necessary to build protocol.

Next, you can see the error. I have a error in the packet_in the
variable ethernet.

------------------------------ERROR----------------------------------------------------------

make -C /lib/modules/2.6.9-gentoo-r9/build  SUBDIRS=/root/nist-dymo modules
make[1]: Entering directory `/usr/src/linux-2.6.9-gentoo-r9'
 CC [M]  /root/nist-dymo/packet_in.o
/root/nist-dymo/packet_in.c: In function `packet_in':
/root/nist-dymo/packet_in.c:107: error: union has no member named `ethernet'
make[2]: *** [/root/nist-dymo/packet_in.o] Error 1
make[1]: *** [_module_/root/nist-dymo] Error 2
make[1]: Leaving directory `/usr/src/linux-2.6.9-gentoo-r9'

-------------------------------------------------------------------------------------------------

Thanks!!!
Kai Weber | 4 Nov 2005 10:42
Picon

Software for mobile ad hoc networks

Hello,
 
I'm looking for some software (Windows- and/or Linux-based) to configure a MANET-testbed.
Within the testbed there are several PDA and notebooks. A MANET-topology should be built up by using some kind of software like wnte.
 
Do you know any software to install on the nodes to ensure the MANET-functionality and a topology emulator?
 
 
Best regards
 
Kai
 
 
_______________________________________________
manet mailing list
manet <at> ietf.org
https://www1.ietf.org/mailman/listinfo/manet
dario bottazzi | 4 Nov 2005 10:58
Picon
Favicon

Re: Software for mobile ad hoc networks

The information you provided are a bit scarce
so it is very hard to suggest a tool
However, mobiemu may be useful to your purposes. It
permits to emulate the mobility of a manet over a wireline environment

http://mobiemu.sourceforge.net/

best regards
       dario bottazzi

PS. we fixed a few minor bugs of this system. If you need it I will 
send you
the patches

Gmane