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Closed-loop rate adaptive scheme is mutually considered both the rate and CW values. CRAS is a receiver-assisted rate adaptation protocol. It also considers the loss of frames due to collisions. The information about atmosphere energy level of a sender is carried via the DATA packet with one extra byte. It introduces a rate suggestion (RS) chart, that received via continuously observing the atmosphere...
We apply hierarchical sparse coding, a form of deep learning, to model user-driven workloads based on on-chip hardware performance counters. We then predict periods of low instruction throughput, during which frequency and voltage can be scaled to reclaim power. Using a multi-layer coding structure, our method progressively codes counter values in terms of a few prominent features learned from data,...
The frequent failures in Wireless Mesh Networks (WMNs) cause severe performance degradations during their lifetime. This increases the need of re-routing of links in WMNs. Expensive manual network management is required for their real-time recovery. This paper presents a Streamlined Re-routing Algorithm (SRA) that enables a multi-radio WMN to autonomously recover from local link failures to preserve...
Currently, IEEE 802.11 is the de facto standard for WLANs. It species both the medium access control and the physical layers for WLANs. The scope of IEEE 802.11 working groups (WGs) is to propose and develop MAC and PHY layer specifications for WLAN to handle mobile and portable stations. In this standard, the MAC layer operates on top of one of several possible physical layers. Medium access is performed...
We present a centralized integrated approach, ADWISER, for (i) managing an Internet access link bandwidth, and (ii) for enhancing the performance of an IEEE 802.11 WLAN. Our single-box approach is an extension to our previous work, where we focused on meeting TCP performance objectives over WLANs. In this work, we present a novel cascaded packet scheduling algorithm to address the issue of unfair...
Interleaved address mapping has been effectively used to improve the performance of a parallely accessible memory subsystem. We propose a generalization of such mappings and study them in the framework of application specific MPSoCs. In this generalization, a section of the address bits is used to map each address to a memory bank and a row within that bank, using a look-up table(LUT). We model the...
Sharing on-chip network resources efficiently is critical in the design of a cost-efficient network on-chip (NoC). Concentration has been proposed for on-chip networks but the trade-off in concentration implementation and performance has not been well understood. In this paper, we describe cost-efficient implementations of concentration and show how external concentration provides a significant reduction...
In this paper, we propose a new throughput analysis for IEEE 802.11 distributed coordination function (DCF) considering the real channel conditions and capture effects under arbitrary load conditions employing basic access method. The aggregate throughput of a practical wireless local area (WLAN) strongly depends on the channel conditions. In real radio environment, the received signal power at the...
In our earlier work, the authors proposed WLAN Manager (or WM) a centralised controller for QoS management of infrastructure WLANs based on the IEEE 802.11 DCF standards. The WM approach is based on queueing and scheduling packets in a device that sits between all traffic flowing between the APs and the wireline LAN, requires no changes to the AP or the STAs, and can be viewed as implementing a ldquoSplit-MACrdquo...
This paper provides an analysis of optimum offered load that maximizes the throughput of IEEE 802.11 media access control (MAC) protocol for the multihop network. We extend Ping Chung Ng analysis in presence of hidden terminal and capture effect, with some modifications in the derivation of throughput. The analytical throughput results are validated against ns-2 simulation using direct sequence spread...
This paper presents an analytical model and the performance study of IEEE 802.11 distributed coordination function (DCF) for the nonsaturated heterogeneous traffic. In this paper, we modify the Bianchipsilas Markov chain model for the nonsaturated environment and analyze the throughput under several conditions and several set of parameters, with the aim of obtaining the accurate throughput when stations...
This paper presents an analytical model for the performance study of IEEE 802.11 distributed coordination function (DCF). The maximum throughput can be achieved well below the saturated load. The analytical model for finite load must be studied to know the performance of the medium access control (MAC) layer below the saturated load. We extend the Bianchipsilas saturation model for the nonsaturated...
This paper provides an analysis of optimum offered load that maximizes the throughput of IEEE 802.11 Media Access Control (MAC) protocol for the multihop network. We extend Ping Chung Ng analysis in presence of hidden terminal and capture effect, with some modifications in the derivation of throughput. The analytical throughput results are validated against simulation using Direct Sequence Spread...
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