Evolutionary game theory predicts that cooperation in social dilemma games is promoted when agents are connected as a network. However, when networks are fixed over time, humans do not necessarily show enhanced mutual cooperation. Here we show that reinforcement learning (specifically, the so-called Bush-Mosteller model) approximately explains the experimentally observed network reciprocity and...

In wireless communication networks, the load balancing mechanism can improve the frequency utilization and reduce the outage rate. Furthermore, the user cooperation is used to enhance the SNR of the edge user. Therefore, in cooperative wireless communication network, the cooperation probability is introduced in the handover decision function of existing load balancing mechanisms which are based...

If actors want to reach a particular goal, they are often better off forming collaborative relations and investing together rather than investing separately. We study the coordination and cooperation problems that might hinder successful collaboration in a dynamic network setting. We develop an experiment in which coordination problems are mainly due to finding partners for collaboration, while...

In heterogeneous network environments, it is very important for users to provide seamless services while satisfying quality-of-service, regardless of the connected access network. In this paper, we apply a concept of ad hoc cooperation for the vertical handoff in the heterogeneous network. For the seamless vertical handoff of mobile nodes, a neighbor ad hoc node assists some parts of the handof...

Diversity is an effective technique in enhancing the link quality and increasing network capacity. When multiple antennas can not be used in mobile units, user cooperation can be employed to provide transmit diversity. In this paper, we analyze the error performance of coded cooperative diversity with multiple cooperating users over Nakagami fading channels under interference conditions. We der...

A robust worldwide air-transportation network (WAN) is one that minimizes the number of stranded passengers under a sequence of airport closures. Building on top of this realistic example, here we address how spatial network robustness can profit from cooperation between local actors. We swap a series of links within a certain distance, a cooperation range, while following typical constraints o...

Abstract— The fundamental limits of communication over a wireless network of nodes has recently become an area of intense research. Even in the simplest case, the information theoretic capacity region of multi-terminal networks remains an open problem. The analysis of networks is made even richer through the recent introduction of cognitive radios, which could allow for cooperation between netw...

Distributed blackboard is one of the popular agent communication architectures. However, in current agent systems, the distributed blackboard architecture is kept fixed after its initial setting, which may influence the system performance when network topology or agent cooperation relations are changed during operation. To solve the problem, this paper presents a novel mechanism for adjusting a...

In MANETs, most network functions count on node cooperation. Forwarding packets of other nodes is a basic example of such cooperation. However, nodes may not be interested in forwarding the requested packets because of being selfishness or malice, which significantly degrades network performance. Therefore, in respect of node forwarding process, we propose a global punishment-based repeated-gam...

This thesis will study the issue of user cooperation and antenna sharing to improve wireless communication, network (autonomous) time keeping and network (autonomous) topology estimation.