Vidal's libraryTitle: | An algorithm for distributing coalitional value calculations among cooperating agents |
Author: | Talal Rahwan and Nicholas R. Jennings |
Journal: | Artificial Intelligence |
Volume: | 171 |
Number: | 8--9 |
Pages: | 536--567 |
Year: | 2007 |
DOI: | 10.1016/j.artint.2007.03.002 |
Abstract: | The process of forming coalitions of software agents generally requires calculating a value for every possible coalition which indicates how beneficial that coalition would be if it was formed. Now, instead of having a single agent calculate all these values (as is typically the case), it is more efficient to distribute this calculation among the agents, thus using all the computational resources available to the system and avoiding the existence of a single point of failure. Given this, we present a novel algorithm for distributing this calculation among agents in cooperative environments. Specifically, by using our algorithm, each agent is assigned some part of the calculation such that the agents' shares are exhaustive and disjoint. Moreover, the algorithm is decentralized, requires no communication between the agents, has minimal memory requirements, and can reflect variations in the computational speeds of the agents. To evaluate the effectiveness of our algorithm, we compare it with the only other algorithm available in the literature for distributing the coalitional value calculations (due to Shehory and Kraus). This shows that for the case of 25 agents, the distribution process of our algorithm took less than 0.02% of the time, the values were calculated using 0.000006% of the memory, the calculation redundancy was reduced from 383229848 to 0, and the total number of bytes sent between the agents dropped from 1146989648 to 0 (note that for larger numbers of agents, these improvements become exponentially better). |
@Article{rahwan07a,
author = {Talal Rahwan and Nicholas R. Jennings},
title = {An algorithm for distributing coalitional value
calculations among cooperating agents},
journal = {Artificial Intelligence},
year = 2007,
volume = 171,
number = {8--9},
pages = {536--567},
abstract = {The process of forming coalitions of software agents
generally requires calculating a value for every
possible coalition which indicates how beneficial
that coalition would be if it was formed. Now,
instead of having a single agent calculate all these
values (as is typically the case), it is more
efficient to distribute this calculation among the
agents, thus using all the computational resources
available to the system and avoiding the existence
of a single point of failure. Given this, we present
a novel algorithm for distributing this calculation
among agents in cooperative
environments. Specifically, by using our algorithm,
each agent is assigned some part of the calculation
such that the agents' shares are exhaustive and
disjoint. Moreover, the algorithm is decentralized,
requires no communication between the agents, has
minimal memory requirements, and can reflect
variations in the computational speeds of the
agents. To evaluate the effectiveness of our
algorithm, we compare it with the only other
algorithm available in the literature for
distributing the coalitional value calculations (due
to Shehory and Kraus). This shows that for the case
of 25 agents, the distribution process of our
algorithm took less than 0.02\% of the time, the
values were calculated using 0.000006\% of the
memory, the calculation redundancy was reduced from
383229848 to 0, and the total number of bytes sent
between the agents dropped from 1146989648 to 0
(note that for larger numbers of agents, these
improvements become exponentially better).},
url = {http://jmvidal.cse.sc.edu/library/rahwan07a.pdf},
doi = {10.1016/j.artint.2007.03.002},
keywords = {coalition negotiation}
}
Last modified: Wed Mar 9 10:16:48 EST 2011