The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the rapid development of modern wireless communication systems, the visible light communication system using LED becomes popular due to the higher transmission speed and more reliable QoS. In this paper, we analyze the principle of VLC communication systems and make a field trial simulation using the single chip machine. The analysis of VLC indicates that the VLC communication system could help...
The time delay matching between cancellation path and radiation interference coupling path, in the analog broadband interference cancellation system, is very important. In this paper, we define instantaneous cancellation bandwidth based on the carrier frequency, and deduce the interference cancellation ratio (ICR) in detail with the consideration of large loop time delay mismatch. The numerical relation...
With the ever increasing number of large scale Internet applications, inter data center (inter-DC) data transfers are becoming more and more common. Traditional inter-DC transfers suffers from both low-utilization and congestion, and traffic prediction is an important method to optimize these transfers. Inter-DC traffic is harder to predict than many other types of network traffic, because it is dominated...
Graphene has become a hot topic since it was discovered. However, articles about using graphene in passive devices, especially the GHz band antennas for modern communication application, have been less reported so far. In this work, a dipole antenna printed on a substrate is proposed and experimentally investigated, where the graphene sheet is connected to the ends of the dipole. This dipole is designed...
In this paper, we address the OpenFlow virtual network (VN) design problem. Unlike most of the existing approaches that directly performing bandwidth slicing on the physical networks, we take traffic uncertainly and statistical multiplexing into consideration. In our system, a user can specify the desired VN topology and the capacity for each virtual link (VL). The bandwidth descriptor for a VL consists...
Recent advances of loop interference cancellation techniques enable full-duplex relaying (FDR) systems, which transmit and receive simultaneously in the same band with high spectrum efficiency. Unlike the existing works, in this paper, we study the energy efficiency aspect of resource allocation in FDR systems. We consider a OFDMA cellular network, where a shared FDR is deployed at the intersection...
In an OpenFlow network, the controller is responsible to control and manage the whole network. Although such central control paradigm is easier to achieve efficient network resources usage, the controller becomes the bottleneck when the network size is large. In this paper, we propose using pre-provisioned paths to mitigate the burden on a controller. The basic idea is to setup some background paths...
With the growing concern over energy consumption, green communication is becoming more and more important. Lots of efforts have been put into investigating in energy-efficient wireless systems. Since Fractional Frequency Reuse (FFR) is a widely-used Inter-cell-interference coordination scheme in the OFDMA wireless network, we consider the energy-efficient power control in the FFR system. With demanded...
In this work, we address the Routing and Time slot Assignment (R&TA) problem in multi-hop PLC access networks. In our system, time is divided into fixed sized TDM cycles. Each cycle comprises a semi-dynamic bandwidth allocation period (SBAP) and a dynamic bandwidth allocation period (DBAP). The SBAP is used to provide each PLC CPE fixed bandwidth for providing bandwidth guaranteed services. It's...
The interference cancellation can restrain the strong interference between high power transmitter and receiver. The main point is to make sure the time delay between interference signal and reference signal match. The paper researches on the influence of time delay to the interference cancellation system. When the interference signal is single frequency signal, the ICR is unrelated with the time delay...
As a failure occurs, the affected traffic is quickly switched to backup paths for a network performing a fast IP rerouting. However, the rerouted traffic may cause congestion along the backup paths that would result in more packet losses than purely discarded the affected flows. In this paper, we take the concept of interface specific forwarding (ISF) to provide more flexibility in determining load...
This paper proposes a remote thin client system for real time multimedia streaming over VNC. A remote frame can be split as two parts, i.e. high motion part and low motion part, and transmitted through the Internet from servers to clients according to the proposed hybrid RTP protocol. A Dynamic Image Detection Scheme (DIDS) is proposed to automatically detecting the high motion part of a frame with...
According to the demand of the Doppler frequency shift estimation under low signal-noise-ratio (SNR) conditions, the stochastic resonance (SR) technique from the nonlinear science is applied to signal pre-processing and a novel algorithm with the level crossing rate (LCR) estimation is proposed in this paper. Theoretical derivation demonstrates the proposed algorithm can effectively improve SNR and...
Peer-to-peer (P2P) multimedia sharing is widely envisioned as one of the major applications of wireless communication network in the future, and wireless bandwidth constraint is its principal obstacle. Aiming to save bandwidth, a novel P2P lookup protocol named BF-chord is proposed, in which the finger table in chord is changed, shared files' information is compressed into Bloom filters (BFs) before...
Due to the heterogeneity of radio access technology and service in the 4G heterogeneous wireless access networks, it has been a great challenge on radio resource management. This paper considers a bandwidth allocation approach for multiple services in fourth generation (4G) heterogeneous wireless access networks where a mobile with multi-homing capability will be able to simultaneously connect to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.