Fast power control for cross-layer optimal resource allocation in DS-CDMA wireless networks

• This paper presents a novel cross-layer design for joint power and end-to-end rate control optimization in DS-CDMA wireless networks, along with a detailed implementation and evaluation in the network simulator ns-2. Starting with a network utility maximization formulation of the problem, we derive distributed power control, transport rate and queue management schemes that jointly achieve the optimal network operation. Our solution has several attractive features compared to alternatives: it adheres to the natural time-scale separation between rapid power control updates and slower end-to-end rate adjustments, and uses simplified power control mechanisms with reduced signalling requirements. We argue that these features are critical for a successful real-world implementation. To validate these claims, we present a detailed implementation of a crosslayer adapted networking stack for DS-CSMA ad-hoc networks in ns-2. We describe several critical issues that arise in the implementation, but are typically neglected in the theoretical protocol design, and evaluate the alternatives in extensive simulations.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

Nyckelord

Critical issues

Cross-layer

Cross-layer design

Distributed power control

DS-CDMA

Extensive simulations

Fast power control

Joint power

Natural time

Network simulator NS-2

Network utility maximization

Optimal networks

Optimal resource allocation

Protocol design

Queue management scheme

Rate adjustment

Rate controls

Real-world implementation

Transport rate

Code division multiple access

Dielectric relaxation

Optimization

Planning

Power control

Resource allocation

Telecommunication services

Wireless telecommunication systems

Ad hoc networks

Telecommunication

Telekommunikation

Publikations- och innehållstyp

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