Original scientific paper Under the delay tolerant network, high mobility of the node and the transmission distance make it impossible to keep a durable and regular data routing path between two nodes. As a result, such failure affects the function of packet routing mechanism. Therefore, in order to improve the efficacy of data transmission, conventional delay tolerant routing adopts more packe...

In this paper, we investigate a mobile relaying system assisted by an unmanned aerial vehicle (UAV) with finite size of the buffer. Under buffer limit and delay constraints at UAV relay, consider dual-hop mixed free-space optical/radio frequency (FSO/RF) (i.e., source-to-relay relay-to-destination links employ FSO RF links, respectively). Taking imbalance in transmission rate between into consi...

In this paper, we consider the problem of transmission delay in terms of finite coding length derived from the random coding bound for different cooperative protocols. Specifically, we first study the impact of cooperative transmission on the routing decision for wireless ad-hoc networks, where a routing optimization problem is formulated to minimize the endto-end delay that ensures a satisfact...

Wireless sensor network can be applied to large-scale environment surveillance such as marine environment monitoring. In such application case, besides the protocol structure and the energy consumption, the signal’s real-time transmission and successfully transmitting rate of critical nodes also play an important role in improving the whole system’s performance. In this paper, a new parameter c...

We address the problem of group delay ripples in chirped fibre gratings on dispersion compensation in optical transmission systems. We show that the intersymbol interference, which is a highly harmful effect induced by the group delay ripples in transmission systems, can be substantially reduced by the use of nonlinear optical loop mirrors. This leads to an improvement of the system performance...

The large group delay of the high order FIR filters is unacceptable in some applications. So, recently, how to reduce the group delay of FIR filters has been studied intensively. To reduce the ringing in the time domain and to maximize the stopband attenuation, it is useful to design FIR filters with maximally flat characteristics in the passband and transmission zeros in the stopband. We prese...

Kwonhue Choi et al. 437 We derive a new joint power and rate control rule with which we can minimize the mean transmission delay in CDMA networks for a given mean transmission power. We show that it is optimal to respectively control the power inverse-linearly and the rate linearly to the square root of channel gain while maintaining the signal-to-interference ratio at a constant. We also show ...

In this paper, we propose a real-time communication scheme that can be used in general point-to-point real-time multicomputer systems with wormhole switching. Real-time communication should satisfy the two requirements of predictability and priority handling. Since traditional wormhole switching does not support priority handling, which is essential in real-time computing, flit-level preemption...

As ATM network is designed for broad band transmission that is high data rate (25 Mbps to 2.5 Gbps) and supports the transmission of every kind of data, congestion control and delay have been important issues for ATM networks. Data transmission is done in the form of cell (53 bytes) relay. Hence, cell sequence and the error control have to be carried out properly. ATM networks presents difficul...

The Mobile ad Hoc Networks work for number of applications in the present times. Some of the uses require quick transmission of the data from an emergency disaster prone area to the help centers. If the objective of least end to end delay between the transmissions is defeated for the delay sensitive applications, then it could lead to more harm. Jelly Fish attack is one such kind of many possib...