Vidal's libraryTitle: | Automated Negotiation Among Autonomous Agents in Negotiation Networks |
Author: | Hrishikesh J. Goradia |
Year: | 2007 |
Abstract: | Distributed software systems are a norm in today’s computing environment. These systems typically comprise of many autonomous components that interact with each other and negotiate to accomplish joint tasks. Today, we can integrate potentially disparate components such that they act coherently by coordinating their actions via message exchanges. Once this integration issue is resolved, the next big challenge in computing is the automation of the negotiation process between the various system components. In this dissertation, we address this automated negotiation problem in environments where there is a conflict of interest among the system components. We present our negotiation model - a negotiation network - where a software system is a network of agents representing individual components in the system. We analyze the software system as a characteristic form game, one of many concepts in this dissertation borrowed from game theory. The agents in our model preserve the selfinterest of the components they represent (their owners), and make decisions that maximize the expected utilities of their owners. These agents accomplish joint tasks by forming coalitions. We show that the problem of computing the optimal solution, where the utilities of all agents are maximized, is hyper-exponential in complexity. We present an approximate algorithm for this hard problem, and evaluate it empirically. The simulation results show that our algorithm has many desirable properties - it is distributed, efficient, stable, scalable, and simple. Our algorithm produces the optimal (social welfare maximizing) solution for 96% of cases, generates maximal global revenue for 97% of cases, converges to 90% of the best found allocation after only 10 rounds of negotiation, and finds a core-stable solution for revenue distribution among the agents for cases with nonempty core. Finally, to ensure stability for all cases, we present a sliding-window algorithm that computes the nucleolus-stable solution under all situations. |
@PhdThesis{goradia07phd,
author = {Hrishikesh J. Goradia},
title = {Automated Negotiation Among Autonomous Agents in
Negotiation Networks},
school = {University of South Carolina},
year = 2007,
abstract = {Distributed software systems are a norm in today’s
computing environment. These systems typically
comprise of many autonomous components that interact
with each other and negotiate to accomplish joint
tasks. Today, we can integrate potentially disparate
components such that they act coherently by
coordinating their actions via message
exchanges. Once this integration issue is resolved,
the next big challenge in computing is the
automation of the negotiation process between the
various system components. In this dissertation, we
address this automated negotiation problem in
environments where there is a conflict of interest
among the system components. We present our
negotiation model - a negotiation network - where a
software system is a network of agents representing
individual components in the system. We analyze the
software system as a characteristic form game, one
of many concepts in this dissertation borrowed from
game theory. The agents in our model preserve the
selfinterest of the components they represent (their
owners), and make decisions that maximize the
expected utilities of their owners. These agents
accomplish joint tasks by forming coalitions. We
show that the problem of computing the optimal
solution, where the utilities of all agents are
maximized, is hyper-exponential in complexity. We
present an approximate algorithm for this hard
problem, and evaluate it empirically. The simulation
results show that our algorithm has many desirable
properties - it is distributed, efficient, stable,
scalable, and simple. Our algorithm produces the
optimal (social welfare maximizing) solution for
96\% of cases, generates maximal global revenue for
97\% of cases, converges to 90\% of the best found
allocation after only 10 rounds of negotiation, and
finds a core-stable solution for revenue
distribution among the agents for cases with
nonempty core. Finally, to ensure stability for all
cases, we present a sliding-window algorithm that
computes the nucleolus-stable solution under all
situations.},
url = {http://jmvidal.cse.sc.edu/papers/goradia07c.pdf},
keywords = {multiagent negotiation}
}
Last modified: Wed Mar 9 10:16:48 EST 2011