Internet DRAFT - draft-manjunath-manet-integrated-qos

draft-manjunath-manet-integrated-qos



INTERNET-DRAFT                                           Manjunath Iyer
Expires: December 18, 2006                      Celstream
                                                          June 18, 2006

 

 
      Integrated algorithm for QoS in  MANET
               draft-manjunath-manet-integrated-qos-00.txt
                                        

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   Copyright (C) The Internet Society (2006).

Abstract


Meeting the agreed service quality in a mobile ad hoc network 
is tough and addressed in [RFC1677]. A mechanism is provided 
in [RFC2501]. In this draft, usage of an integrated algorithm 
is described. The fading RF channels introduce the harmful 
self-similarity in to the traffic. To counter the same, another 
self-similar controlling mechanism may be inserted for the better 
wireless network performance and optimal resource utilization. 



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1.  Introduction

1.1  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
   this document are to be interpreted as described in [RFC2119].

1.2  Overview

    
In a wireless ad hoc network, where the channel characteristics are not 
fixed, providing the information over the network status through a 
feedbackpath would be difficult. Hence a virtual feedback may be 
provided. The virtual feedback would not be from end to end. It could 
be confined to a small part of the wireless channel such as a base 
station or a switch.  

Providing a piece- wise feedback at one or more points along the path 
would impart interesting properties. The entire channel behaves as 
though a kind of feedback is provided from end to end.


1.3  Integration of Quality of service 

The methods for Meeting the service parameters in a wireless channel 
are provided in [RFC1677].One of the issues with the RF channels is 
that the characteristics of the channel vary overtime and space. An 
adaptive model that looks more at the traffic characteristics than the 
channel characteristics is more realistic to the problem of traffic 
shaping. Towards meeting the service quality, a scheduling algorithm 
is assigned to meet each of the service qualities putting a stringent 
time bound constraint for switching over the algorithms dynamically as 
suggested in the [RFC2501]. A single controller that removes the 
redundancies among the set of algorithms MAY be used to cater for the 
different algorithms. 




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2. Impact of piecewise feedback

The piece wise feedback imparts self-similarity for the traffic that 
passes across the controller. This self-similarity has to counter 
the one introduced as a result of fading over the wireless channel. 
Providing the self-similarity through the controller may be linked to 
the usage a single scheduler that learns the scheduling rules. A control 
element with feedback results in multiple resolution at the output. 
Each of these resolutions map on to a QoS or scheduling algorithm.

The converse is also true.  A set of rules may be learnt by a controller 
with feedback, that imparts self-similarity in the network. The 
self-similarity arises as result of the long-range dependency coming 
from the usage of an array of the previous outputs from the feedback 
path in the decision making process for QoS or scheduling. 

The multiple scheduling algorithms are brought in by providing 
different weightages for the different feedback signals in the 
decision making process. Intuitively, any decision process can be 
captured by an arbitrary function that is expressible in terms of 
differentials of different orders. 

The scheduling algorithms catering for different QoS are similar in 
nature but differ in scale. They map on to the different outputs of 
the non-linear controller.
 









 






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3.  Security Considerations 


  The wirelwss ad hoc networks are prone to intrusion. Due consideration 
SHALL be given for the security by defining the securiy as a QoS 
parameter.

 
 


4.  IANA Considerations 

This document has no actions for IANA.

 
 
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5.  References

5.1 Normative References 


     [RFC2119] Bradner, S. "Key Words for use in RFCs to Indicate 
             Requirement Levels", BCP 14, RFC 2119, March 1997.  

  

5.2 Informative References 


  
   [RFC1677] Adamson, B., "Tactical Radio Frequency Communication 
Requirements for IPng", RFC 1677, August 1994.

   [RFC2501] J. Macker and S. Corson,"Routing protocol 
    performance issues and evaluationconsiderations", January 1999 

 
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6.  Author's Address 

   Manjunath.R
   Celstream.
   9,Prestige bluechip
   Opp.Christ college
   Bangalore-560029
   INDIA
   Phone: 80-41191919
   E-mail: manju_r_99@yahoo.com
           
      





 
 
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7.  Acknowledgements 

   The author acknowledges the creators of the RFCs referred in this
 draft for the valuable information and the extensions based on 
 which this draft has been created   

   The following individuals directly contributed for encouragement,
   identifying   Issues,  suggesting resolutions to the issues found in 
   this document: Srinivas Rao, Rangaraj. This document benefited
   from all these contributions. 

   The author acknowledges the encouragement and services rendered
   by his family members and colleagues during the preparation of the 
   document.   





 
 
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8.  Full Copyright Statement 

   Copyright (C) The Internet Society (2006).  This document is 
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   This document and the information contained herein are 
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   DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT 
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   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES 
   OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 





 
 
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