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Virtual Multiple-Input Multiple-Output (MIMO) is a promising uplink technology that can meet the throughput demand of Long-Term Evolution-Advanced (LTE-A) systems. However, the complexity of scheduling virtual MIMO is a challenge; existing virtual MIMO is therefore limited to best effort applications. We investigate the resource allocation and scheduling problem in a heterogeneous virtual MIMO system...
Our paper presents solutions using erasure coding, parallel connections to storage cloud and limited chunking (i.e., dividing the object into a few smaller segments) together to significantly improve the delay performance of uploading and downloading data in and out of cloud storage. TOFEC is a strategy that helps front-end proxy adapt to level of workload by treating scalable cloud storage (e.g....
Delay and capacity (throughput) are two important parameters to route data packets in Mobile Ad Hoc Networks (MANETs). In this paper, a new connectionless routing algorithm has been proposed to overcome the performance limit. The proposed algorithm is an extension of dynamic virtual route (DVR) algorithm. Mobility degree of nodes' neighborhood is used to calculate two mobility metrics. Mobility metrics...
In this paper we study the influence of Weighted Round Robin (WRR) scheduling algorithm frame size to the performance of Crosspoint Queued (CQ) crossbar switch. In order to show that throughput and cell delay can be adjusted with appropriate WRR frame size, we analyzed switch for different values of frame size and under the unbalanced bursty traffic. We show that WRR scheduling algorithm achieve throughput...
The focus of the present research is to design a receiver circuit for high speed and high throughput data transmission over the interconnect line. This is achieved using current mode signaling in interconnects. In the present paper an efficient receiver for current mode interconnect system is proposed. The analysis shows that the proposed receiver has 26.65% lesser latency at room temperature for...
Several localization techniques have been proposed to identify the exact location of sensor nodes. Localization is important for computation of many applications such as routing in wireless sensor network. Energy preservation is a challenge in wireless sensor network and many algorithms have already been proposed. The localized node lifetime is maximized by using energy-efficient routing, use of minimum...
Wimax is an broadband wireless technology based on IEEE 802.16. It is very helpful and cheaper than other possible solutions. It is purely based on the 4G technology for the upcoming generation. In wireless technology the major problem is speed, Quality of Service, data rates in order to overcome that they going for some valuable technology. In this paper we consider WIMAX and WLAN for controlling...
In mobile communications, seamless mobility is needed among heterogeneous wireless networks. Service continuity can be maintain by using an accurate vertical handover scheme. IEEE802.21 standard facilitates handover between heterogeneous networks by presenting media independent handover (MIH) reference models for different link layers technologies. In this paper, we carried out a comprehensive analysis...
Mobile communication systems are equipped with multiple network interfaces. Wireless Fidelity (WiFi) and 3rd Generation (3G) are the most widely implemented interfaces in the latest mobile communication devices and therefore being able to fulfil most of the computing aspects. Nowadays, most modern mobile devices suffer from the interoperability between the WiFi and 3G interfaces, each access technology...
We have considered various types of congestion control algorithms. Each congestion algorithm has its own advantages and it would vary from parameters to parameters. Random Early Detection (RED) is more focused on queue length and BLUE is care about loss of packets. In this paper we have found the problems with existing congestion control algorithms. We have tried to show their performance of RED,...
The paper envisages the network modeling of a wireless multicast network by approach of optimized joint MAC scheduling and network coding. A heuristic method of designing a network is achieved by scheduling algorithm which is based on network parameters such as interference free transmissions, and optimization of avoidable scheduling sets. We derive a joint linear optimization problem which is used...
In the development of advanced data acquisition, testing or telecommunication equipment, one often relies on modular off-the-shelf processor boards and I/O-boards that are being composed to a single distributed system. To support such architectures, the microTCA (micro Telecommunication Computing Architecture) offers standardized racks and standardized back panel communication protocols connecting...
Recent expansion of the computer networks has opened a possibility of explosive spread of computer viruses. Viral spreads that attack the end user or the nodes and hence the traffic on the network increases by self duplication and perpetuation. The net effect is, increase of senseless throughput spiraling, multiplication of load, and increased delay, leading to severe congestion and crash. Thus there...
Analytical models of the Distributed Coordination Function (DCF) have numerous applications in the performance analysis of IEEE 802.11 networks. The model proposed in this paper distinguishes itself from existing approaches in that it allows throughput, delay, and frame loss ratio analysis under both saturation and non-saturation network conditions. It combines the Markov chain and the queuing theory...
The behavior of Networked Embedded Systems (NES) is not only driven by network components but also by the surrounding environment. To verify the correct behavior of such systems, different tests should be performed under different environmental conditions. The complexity and expense of testing such systems in real environments leads us to propose a simulation-based approach to tackle this problem...
Rapid technological advances and innovations in the area of autonomous systems push the researchers towards autonomous networked systems with emphasis on Wireless Sensor Networks (WSNs). In WSN event-driven applications, it is critical to report the detected events in the area, resulting in sudden bursts of traffic due to occurrence of spatially-correlated or multiple events, causing loss of data...
In this paper we study the influence of Weighted Round Robin (WRR) scheduling algorithm frame size to the performance of Crosspoint Queued (CQ) crossbar switch. In order to show that throughput and cell delay can be adjusted with appropriate WRR frame size, we analyzed switch for different values of frame size and under the unbalanced bursty traffic. We show that WRR scheduling algorithm achieve throughput...
Since wireless sensor nodes are battery powered, the emphasis was on reducing the energy consumption of the sensor nodes. However, with the increase in real-time traffic requirements in wireless sensor nodes, network performance metrics are increasingly important. Nonetheless, most existing network performance studies were done via simulation, with few experimental studies performed on testbeds using...
In this paper, we study the problem of user pairing algorithms for uplink virtual multiple-input multiple-output (V-MIMO) networks, with Quality of Service (QoS) considered. After analyzing the transmission model and delay model, we propose a balanced QoS and proportional fair (B-QPF) algorithm of user pairing, which selects users depending on proportional fair (PF) criterion and the instantaneous...
Video streaming is the real time delivery process of video to the user's media player services. In multimedia streaming technique, the user can access data while it is being transferred. To meet the demand of providing high-quality of video streaming, it is important to design suitable QoS model. Hence, in this project, we designed around streaming services using an Internet topology on expected video...
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