15,645 research outputs found
Throughput capacity of two-hop relay MANETs under finite buffers
Since the seminal work of Grossglauser and Tse [1], the two-hop relay
algorithm and its variants have been attractive for mobile ad hoc networks
(MANETs) due to their simplicity and efficiency. However, most literature
assumed an infinite buffer size for each node, which is obviously not
applicable to a realistic MANET. In this paper, we focus on the exact
throughput capacity study of two-hop relay MANETs under the practical finite
relay buffer scenario. The arrival process and departure process of the relay
queue are fully characterized, and an ergodic Markov chain-based framework is
also provided. With this framework, we obtain the limiting distribution of the
relay queue and derive the throughput capacity under any relay buffer size.
Extensive simulation results are provided to validate our theoretical framework
and explore the relationship among the throughput capacity, the relay buffer
size and the number of nodes
Applications of Repeated Games in Wireless Networks: A Survey
A repeated game is an effective tool to model interactions and conflicts for
players aiming to achieve their objectives in a long-term basis. Contrary to
static noncooperative games that model an interaction among players in only one
period, in repeated games, interactions of players repeat for multiple periods;
and thus the players become aware of other players' past behaviors and their
future benefits, and will adapt their behavior accordingly. In wireless
networks, conflicts among wireless nodes can lead to selfish behaviors,
resulting in poor network performances and detrimental individual payoffs. In
this paper, we survey the applications of repeated games in different wireless
networks. The main goal is to demonstrate the use of repeated games to
encourage wireless nodes to cooperate, thereby improving network performances
and avoiding network disruption due to selfish behaviors. Furthermore, various
problems in wireless networks and variations of repeated game models together
with the corresponding solutions are discussed in this survey. Finally, we
outline some open issues and future research directions.Comment: 32 pages, 15 figures, 5 tables, 168 reference
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