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
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