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In this paper, we propose an adaptive bandwidth allocation (BA) and connection admission control (CAC) mechanism based on game theory for polling services in IEEE 802.16 broadband wireless networks. A noncooperative two-person general-sum game is formulated where the base station and a new connection are the players of this game. The game formulation provides not only the decision on accepting or...
Video traffic over cellular and broadband wireless access networks has been rapidly increasing in the recent years. To ameliorate the effect of this increase at wireless bottleneck links, we design and implement the first farsighted flow management framework, called MESA. During periods of network overload, MESA attempts to maximize the long-term quality of experience for each user. MESA has three...
Proper admission control in cognitive radio networks is critical in providing QoS guarantees to secondary unlicensed users. In this paper, we study the admission control and channel allocation problem in overlay cognitive radio networks under the maximum cumulative delay constraint. We formulate it as a Markov decision process problem, and then solve it by transforming the original formulation into...
In this paper. we consider an admission control algorithm for cellular networks. It is based on direct/dynamic monitoring of the QoS performances - the delay tail of the admitted users. The main purpose of the direct monitoring of QoS performances is to guarantee the required QoS provision more precisely. The system delay tail is effectively computed by the proposed delay tail estimation algorithm...
In this paper, we propose a new Call Admission Control (CAC) for 802.16 systems. The scheme is based on a dynamic adjustment of the bandwidth offered to all rtPS (Real time polling services) and nrtPS (Non real time plolling services) active connections, for each new connection establishment request in order to maximize the number of accepted connections, without affecting the quality of service offered...
In this paper we propose the following approach to the dimensioning of the radio part of the downlink in OFDMA networks. First, we use information theory to characterize the bit-rate in the channel from a base station to its mobile. It depends on the power and bandwidth allocated to this mobile. Then, we describe the resource (power and bandwidth) allocation problem and characterise feasible configurations...
This paper studies the problem of admission control and air interface selection in heterogeneous network environments. The statistics of random user arrivals and random service durations are considered for the optimization of heterogeneous access management strategies with respect to minimizing the expected mean cost for denial-of-service events. Based on state aggregation in a semi-Markov decision...
Over the past few years, there has been a growing interest for research in wireless adaptive networking and resource management to efficiently handle wireless communications between mobile hosts and base stations. Moreover, in wireless environments, the bandwidth of an ongoing multimedia flow can dynamically be adjusted, so there must be an efficient bandwidth allocation scheme to ensure quality-of-service...
WiMAX standard defines the QoS (Quality of Service) signaling framework and different types of service flows, but the actual QoS guarantee algorithms are open to developers. Admission control in medium access control (MAC) layer without physical (PHY) layer information has a low efficiency. In this paper, to provide the QoS guarantee, we propose a novel cross-layer QoS design which consisting of admission...
While only relatively recently standardized, IEEE 802.16 orWiMAX networks are receiving a great deal of attention in both industry and research. This is so because with the increased emphasis on multimedia data, apart from the general advantage of wireless, 802.16 promises wider bandwidth and QoS as part of the standard. As a back haul network for other networks, in particular the 802.11a/b/g/e or...
This paper addresses the problem of joint admission control and power allocation in the downlink of a single-cell code-division-multiple-access (CDMA) wireless network. The objective is to maximize the user-capacity (or base station revenue), while meeting the strict quality-of-service (QoS) requirements of each admitted user. We prove that the global optimal solution can be found by performing admission...
In a totally reconfigurable network, base stations can be viewed as amorphous entities that are dynamically configured to an optimal combination of radio access technologies based upon the time-varying user density and QoS requirements of the application traffic that they present or will present to it. In such a network, admission control is typically useful in providing load balancing and hotspot...
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