Multi-objective and Financial Portfolio Optimization of Carrier-Sense Multiple Access Protocols with Cooperative Diversity

  • Ramiro Samano-RoblesEmail author
  • Atilio Gameiro
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9305)


This paper addresses a trade-off design and optimization of a class of wireless carrier-sense multiple access (CSMA) protocols where collision-free transmissions are assisted by the cooperative retransmissions of inactive terminals with a correct copy of the original transmission(s). Terminals are thus enabled with a decode-and-forward (DF) relaying protocol. The analysis is focused on asymmetrical settings, where terminals explicitly experience different channel and queuing statistics. This work is based on multi-objective and financial portfolio optimization tools. Each packet transmission is thus considered not only as a network resource, but also as a financial asset with different values of return and risk (or variance of the return). The objective of this financial optimization is to find the transmission policy that simultaneously maximizes return and minimizes risk in the network. The work presented here is focused on the characterization of the boundaries (envelope) of different types of trade-off performance region: the conventional throughput region, sum-throughput vs. fairness, sum-throughput vs. power consumption, and return vs. risk regions. Fairness is evaluated by means of the Gini-index, which is commonly used in economics to measure income inequality. Transmit power consumption is directly linked to the global transmission rate. The protocol is shown to outperform non-cooperative solutions under different network conditions that are discussed in detail in the main body of the paper.


Cooperative diversity Random access Throughput region Multi-objective and financial portfolio optimization 


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Research Centre in Real-Time and Embedded Computing SystemsPortoPortugal
  2. 2.Instituto de TelecomunicaçõesCampus UniversitárioAveiroPortugal

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