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Most of IoT applications include large number of distributed sensors which are interesting in specific geographical area. A large number of IoT entities have multiple relations and dynamic connections with each other. And there are many group communication requirements. Flexible multicast mechanism will be essential in such environments but it is difficult to satisfy verious requirements by means...
Data center applications require strict characteristics regarding packet loss, fairness, head-of-line blocking, latency, and low processing overhead. Motivated by the emergence of IEEE Data Center Bridging, we explore the possibility of controlling congestion in Ethernet layer while guaranteeing those requirements. We propose HetFlow (Heterogeneous Flow) as a delay-based congestion control mechanism...
This paper proposes new cooperative protocols based on energy harvesting relays. The protocols are based on the time switching and power splitting receiver architectures. The proposed protocols provide a fair cooperation, such that the relay does not use its own energy to help the source but harvests energy from the source signal. Assuming that the source knows channel statistics, the throughput achieved...
Direct (or device-to-device, D2D) communications are being investigated in the framework of LTE- Advanced. They allow one-to-one communications between two endpoints, under the control of the eNodeB, which allocates resources for the d2d flow, but does not act as a relay for its traffic. The direct link can also be used for file transfer or proximity-based browsing, i.e. applications running on TCP...
Single clock distribution over a large high performance chip can be very challenging. This led to evolution of globally asynchronous and locally Synchronous (GALS) systems in modern deep sub-micron (DSM) technology. In GALS mostly bundled data protocols which are based on handshake mechanism, are used for data transfer. But these protocols rely on timing assumptions between handshake signals and data...
Direct (or D2D) communications allow two UEs to communicate without passing through the eNodeB. However, the two UEs may still need to relay their communication through the eNB from time to time, hence should be able to switch from the direct to the re-layed mode seamlessly, without this affecting the QoS. In this paper we show that in conventional systems a mode switching may cause relevant losses,...
A dual-band wireless neural stimulation device with high frequency (HF) wireless power transfer (WPT) at 13.56MHz and ultra high frequency (UHF) backscatter communication (BSC) at 915MHz is presented. Neural interfaces hold great promise in the development of future treatment/therapy for debilitating neurological disorders, spinal cord damage, and loss of limb function. Most state-of-the-art wireless...
In the last few years smartphones have increased their capabilities in terms of hardware and software. They are used for many purposes beyond the simple calls and messaging. Presently, industries are focusing on smartphone-devices integration. As a matter of fact, car-smartphone integration is an ever increasing field, even though the car equipments are still used as phone accessories. Our goal is...
PCI Express is a high-performance I/O bus protocol. The PCI Express protocol provides higher bandwidth than the legacy buses that makes PCI Express as an ideal choice for a wide variety of applications such as Network Interface, Graphics Accelerators, and Storage Controllers (SSD). The PCI Express protocol supports many features to improve performance of I/O Bus, so verification of a design based...
Due to the partition/aggregate nature of many cloud applications, incast traffic is preponderant in data center networks (DCNs). Because TCP is agnostic to this composite nature of the applications traffic and their quality of service requirements, a few congestion events often degrade significantly the user perceived quality of service. This is exacerbated by the co-existence of such incast traffic...
Link correlation in wireless sensor networks has recently attracted a considerable amount of attention in the research community. Various pioneer works have empirically demonstrated the existence of link correlations and designed novel network protocols to exploit such link correlations. While all existing works focus on the correlated receptions at multiple receivers from a single sender, in this...
Vehicular Ad hoc NETworks (VANETs) should provide the reliable safety message broadcasts and the efficient non-safety message transmissions to vehicles. The IEEE 1609.4 MAC, which supports multi-channel operations in VANETs, is not reliable enough for the safety message broadcast and not efficient in the Service CHannel (SCH) resources utilization. In this paper, we propose a MAC protocol which supports...
A steady increase in the number of cores within many-core platforms causes increasing contentions for the interconnect medium and leads to non-negligible latencies of intercore communication. In order to study the worst-case execution times of applications, it is no longer sufficient to only take into account schedulability requirements, but the communication delays also have to be considered. In...
The TCP incast problem attracts a lot of attention due to its wide existence in cloud services and catastrophic performance degradation. Some effort has been made to solve it. However, the industry is still struggling with it, such as Facebook. Based on the investigation that the TCP incast problem is mainly caused by the TimeOuts (TOs) occurring at the boundary of the stripe units, this paper presents...
Physical layer security is one possible alternative for the exploding Internet of Things in the coming years. We advance the state of art in physical layer security by implementing self-jamming on ultra low power transceivers without the assistance of “friendly” nodes. The implementation supports flexible payload sizes; where the simplest implementation carries a full data payload. We consider a passive...
Based on the analyzing of FC-AE-1553 protocol, this paper has completed a design of FC-AE-1553 interface GPS module by taking FPGA as the core controller and building Qsys system on chip. As a sensor Network Terminal (NT) in FC-AE-1553 network, the module shall give a correct response to a Network Controller (NC). It also transmits data received from GPS receiver to a FC-AE-1553 network by FC-AE-1553...
Network covert channels enable hidden communication and can be used to break security policies. Within the last years, new techniques for such covert channels arose, including protocol switching covert channels (PSCCs). PSCCs transfer hidden information by sending network packets with different selected network protocols. In this paper we present the first detection methods for PSCCs. We show that...
Railway signaling communication is a kind of safety-related processing and the information has to be delivered safely. RSSP-1 Railway Signal Safety Protocol is a safety communication protocol which aims at protecting the message transmission between railway signaling safety-related equipment in closed transmission systems. CPN is suitable for the verification of the correctness and safety characteristics...
Most of the indoor wireless sensor networks need timely information from sensors during normal and specially emergency situation. Generally a sensor network is designed with sufficient capacity to meet the requirement in normal situation. The design consideration also includes the emergency situation to support up to certain level of emergency. But the emergency situation is unpredictable and difficult...
The new spacecraft area network (SCAN) system for internal satellite communication provides the data transfer between different satellite components. The middleware (MW) switch processor is a main part of a new proposed approach. Instead of current board computer based systems, the new data transfer approach based on network provides more reliable solution. The processor is currently in fabrication...
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