IEEE 802.11n is an ongoing next-generation wireless LAN standard that supports a very highspeed connection with more than 100 Mb/s data throughput measured at the medium access control layer. This article investigates key MAC enhancements help achieve high and efficiency. A detailed description given for various frame aggregation mechanisms proposed in latest draft standard. Our simulation results confirm A-MSDU, A-MPDU, combination of these methods improve extensively channel efficiency...

Reducing power consumption subject to quality-of-service (QoS) provisions is a critical task for next-generation networking. Recent research in resource management orthogonal frequency-division multiple-access (OFDMA) systems has generally assumed the availability of perfect channel state information at transmitter (CSIT) or imperfect CSIT with small uncertainty. Nevertheless, such approaches deliver scheduling strategies high transmitting because, real environments, large feedback delays...

In this paper we investigate potential benefits that an adaptive delayed channel access algorithm can attain for the next-generation wireless LANs, IEEE 802.11n. We show performance of frame aggregation introduced by 802.11n adheres due to priority mechanism legacy 802.11e EDCA scheduler, resulting in a poor overall performance. Because high flows have low utilization, throughputs be amerced further. By introducing additional delay at MAC layer, before scheduling, it will retain aggregate...

In this paper we investigate the potential benefits of a selective delayed channel access algorithm (SDCA) for future IEEE 802.11n based high-throughput networks. The proposed solution aims to resolve poor utilization and low efficiency that EDCA's high priority stations adhere due shorter waiting times consequently network's degrading overall end performance. functions at MAC level where it delays packets from being transmitted by postponing request, on their traffic characteristics. As...

Full body motion capture via the Wiimote and new Wii MotionPlus sensor has yet to be investigated or developed. In addition, mapping of Wiimotecaptured data a computer generated 3D model inside an open source professional animation tool attempted. Within this paper authors initiate study into full markerless human tracking for physical rehabilitation. particular, it includes investigation development first phase system that is able by set-up several Wiimotes placed on different segments....

This paper proposes a novel cross-layer scheduling scheme for single-cell orthogonal frequency division multiple access (OFDMA) wireless system with partial channel state information (CSI) at transmitter (CSIT) and heterogeneous user delay requirements. Previous research efforts on OFDMA resource allocation are typically based the availability of perfect CSI or imperfect but small error variance. Either case consists to typify non tangible as potential facts feedback large estimation errors...

In this paper, a queue aware game theoretic cross-layer scheme is introduced for multiuser orthogonal frequency division multiple access (OFDMA) wireless systems. A joint scheduling process that combines an adaptive modulation (AM) at the physical layer (PHYL) along with discrete Markov modulated Poisson (dMMPP) medium control (MAC) layer, devised. Moreover, relied on cooperative architecture, we formulate optimization problem Nash bargaining solution (NBS) basis. Finally, allocation...

The key issues in the design of a cross-layer optimization scheme for multiuser orthogonal frequency multiple access (OFDMA) systems are optimal subcarrier, bit and rate distribution policies. In many recent researches, these allocation strategies derived either through dynamic programming or via mathematical analysis. When latter option is available, an additional iterative process needed final solution to be obtained. This paper includes performance comparisons between analytical numerical...