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Time-dependent applications using TCP often send thin-stream traffic, characterised by small packets and high inter-transmission-times. Retransmissions after packet loss can result in very high delays for such flows as they often cannot trigger fast retransmit. Redundant Data Bundling is a mechanism that preempts the experience of loss for a flow by piggybacking unacknowledged segments with new data...
Heterogeneous deployment of base stations with different transmit power levels helps increase the network efficiency. Yet, the allocation of powers to base stations should be optimal in order to minimize interferences and thus improve users through-put. In this paper, we present a game theoretical approach to maximize the overall throughput in heterogeneous networks with optimal power allocation....
Small cell networks are one effective solution for solving the contradiction between the rapid increased mobile data activity and limited network capacity. Small cells are densely deployed in hot spots, and the traffic load of which fiercely fluctuates in space and time. This will cause decrease of network throughput and result in cell congestion. In order to improve network throughput and reduce...
The skyrocketing increase of mobile traffic exacerbates the stringent demand for high spectrum efficient communications. In this paper, a spectrum reuse scheme is proposed for heterogeneous networks (HetNets) using Stackelberg game approach to decrease cross-tier interference, thereby effectively improving spectrum efficiency. The macro base stations (BSs), acting as leader in the game, allocate a...
This article investigates the problem of distributed interference management in microcell systems, where many microcell base stations (MBSs) and user equipments (UEs) are randomly located and mutual interference only emerges between neighboring microcells. In addition, only local information can be utilized for each microcell. We propose a new resource multiplexing scheme-Soft Frequency-Time Reuse...
The deployment of IEEE 802.11 based WLANs in populated areas is such that many mobile terminals are covered by several Access Points (APs). These mobiles have the possibility to associate to the AP with the strongest signal (best-RSSI association scheme).This can lead to poor performances and overloaded APs. Moreover, the well known anomaly in the protocol at the MAC layer may also lead to very unpredictable...
This paper investigates the dynamic selection of transmission opportunity (TXOP) which was originally proposed in IEEE 802.11e Enhanced Distributed Channel Access (EDCA). A game theoretic optimisation framework is proposed to schedule the optimal TXOP value for every station according to the current channel capacity and transmission requirements of the stations, in order to improve the efficiency...
We propose adding a vigilante player and using non-traditional game strategy for decision making to improve the performance of a cognitive radio network. To date, the application to cognitive radio networks of a hybrid player such as a vigilante, which is both cooperative and non- cooperative, has not been significantly studied. We use a novel play strategy (i.e., altruism) to police a wireless network...
In heterogeneous relay networks, there are two types of user access connection: direct link and two-hop link. The former is used when a user accesses the Base Station (BS) directly, while the latter, composed of a backhaul link and an access link, is used when a user accesses the BS via a Relay Node (RN). For the RNs with in-band wireless backhaul, two-hop links operate in shared spectrum, and thus...
In this paper, pricing is adopted as incentive mechanism to encourage users to choose their access probabilities considering the real-time network congestion level in a contentionbased wireless random access network. A Stackelberg leaderfollower game is formulated to analyze the competitive interaction between the service provider and the users. In particular, each user chooses the access probability...
In this paper we consider the problem of increasing the throughput of cognitive radio in a cognitive radio network by forming coalitions among cognitive radio users. Recently there have been numerous studies exploring the benefits of the cooperation in a cognitive radio network. The cooperation tends to increase the spectrum sensing performance which in turn results in increased transmission opportunities...
The history of online video games spans over 30 years, with Massively Multiplayer Online Role-Playing Games (MMORPG) being one of the most popular genres. Constant evolution of MMORPGs has also brought along the need to understand how emerging game mechanisms and design choices affect the game data traffic characteristics. This paper presents a network data traffic analysis of Guild Wars 2 (GW2),...
In Wireless Sensor Networks (WSNs), the presence of congestion can increase the ratio of packet loss, energy consumption and reduce of the network throughput. Especially, this situation will be more complex in Internet of Things (IoT) environments, which is composed of thousands of heterogeneous nodes. In this paper, we address the congestion problem between child and parent nodes in RPL-enabled networks,...
Recently, there has been a tremendous increase in demand for mobile data driven by the wide-spread usage of smartphone like devices. Besides the efforts of studies that propose ways for operators to handle this huge growth, there is also an emerging research area of analyzing this new type of user data. In this paper, we perform an analysis on mobile user data to understand general aggregated user...
To optimize the network utility in 3GPP Long Term Evolution-Advanced (LTE-A) heterogeneous networks (HetNets), it is necessary to jointly consider inter-cell interference mitigation and user attachment. Based on potential game formulation, we optimize almost blank subframe (ABS) and/or cell selection bias (CSB) settings for both macrocells and picocells in a distributed manner. We demonstrate the...
We build upon the clean-slate, holistic approach to the design of secure protocols for wireless ad-hoc networks proposed in part one. We consider the case when the nodes are not synchronized, but instead have local clocks that are relatively affine. In addition, the network is open in that nodes can enter at arbitrary times. To account for this new behavior, we make substantial revisions to the protocol...
We propose a clean-slate, holistic approach to the design of secure protocols for wireless ad-hoc networks. We design a protocol that enables a collection of distributed nodes to emerge from a primordial birth and form a functioning network. We consider the case when nodes are synchronized and the network is closed, in that no other nodes can join. We define a game between protocols and adversarial...
Enabling coordination between products from different vendors is a key characteristic of the design philosophy behind future wireless communication networks. As an example, different devices may have different implementations, leading to different user experiences. A similar story emerges when devices running different physical and link layer protocols share frequencies in the same spectrum in order...
This work investigates enabling technology for spectrum sharing in heterogeneous networks (HetNets) deployment, particularly, when a layer of femtocells (FCs) overlaid upon a mobile cellular network. We propose a fully distributed strategic learning based model that enables Femtocells to autonomously identify spectrum use pattern, and accordingly select available resources, such as to operate under...
Femtocells are an integrating part of future cellular systems, where radio resource management is a challenge due to unbalanced backhaul delays and the hotspot nature of femtocells. We propose a new game theoretic framework, where the channel allocation and transmit powers evolve in a distributed manner, adapting to femtocells' topology and traffic demands. The key idea is to cast femtocells' clustering...
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