Bandwidth Allocation and Control Message Scheduling Algorithms for Improving the QoSs of High Priority Traffic in PON

2018 ◽  
Vol 3 (4) ◽  
pp. 112-120 ◽  
Author(s):  
Mohammad Mahbubur Rahman ◽  
Monir Hossen
Keyword(s):  
Bandwidth Allocation ◽  
Scheduling Algorithms ◽  
Message Scheduling ◽  
Control Message ◽  
And Control

scholarly journals Polarization-transparent silicon photonic add-drop multiplexer with wideband hitless tuneability

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Francesco Morichetti ◽  
Maziyar Milanizadeh ◽  
Matteo Petrini ◽  
Francesco Zanetto ◽  
Giorgio Ferrari ◽  
...  
Keyword(s):  
Optical Networks ◽  
Communication Networks ◽  
Bandwidth Allocation ◽  
Core Networks ◽  
Reconfigurable Devices ◽  
Silicon Photonic ◽  
Transmission Quality ◽  
And Control ◽  
Integrated Device ◽  
Dynamic Bandwidth

AbstractFlexible optical networks require reconfigurable devices with operation on a wavelength range of several tens of nanometers, hitless tuneability (i.e. transparency to other channels during reconfiguration), and polarization independence. All these requirements have not been achieved yet in a single photonic integrated device and this is the reason why the potential of integrated photonics is still largely unexploited in the nodes of optical communication networks. Here we report on a fully-reconfigurable add-drop silicon photonic filter, which can be tuned well beyond the extended C-band (almost 100 nm) in a complete hitless (>35 dB channel isolation) and polarization transparent (1.2 dB polarization dependent loss) way. This achievement is the result of blended strategies applied to the design, calibration, tuning and control of the device. Transmission quality assessment on dual polarization 100 Gbit/s (QPSK) and 200 Gbit/s (16-QAM) signals demonstrates the suitability for dynamic bandwidth allocation in core networks, backhaul networks, intra- and inter-datacenter interconnects.

An Efficient and Stable Routing Algorithm in Mobile Ad Hoc Network

2021 ◽  
Vol 13 (04) ◽  
pp. 21-37
Author(s):  
Priyanka Pandey ◽  
Raghuraj Singh
Keyword(s):  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Residual Energy ◽  
Packet Delivery ◽  
Control Message ◽  
Mobile Ad Hoc ◽  
And Control ◽  
Route Request ◽  
Message Overhead

Mobile Ad hoc Network (MANET) is mainly designed to set up communication among devices in infrastructure-less wireless communication network. Routing in this kind of communication network is highly affected by its restricted characteristics such as frequent topological changes and limited battery power. Several research works have been carried out to improve routing performance in MANET. However, the overall performance enhancement in terms of packet delivery, delay and control message overhead is still not come into the wrapping up. In order to overcome the addressed issues, an Efficient and Stable-AODV (EFST-AODV) routing scheme has been proposed which is an improvement over AODV to establish a better quality route between source and destination. In this method, we have modified the route request and route reply phase. During the route request phase, cost metric of a route is calculated on the basis of parameters such as residual energy, delay and distance. In a route reply phase, average residual energy and average delay of overall path is calculated and the data forwarding decision is taken at the source node accordingly. Simulation outcomes reveal that the proposed approach gives better results in terms of packet delivery ratio, delay, throughput, normalized routing load and control message overhead as compared to AODV.

A Decentralized Bandwidth Allocation Scheme for Long-Reach Passive Optical Network

2014 ◽  
Vol 631-632 ◽  
pp. 795-800
Author(s):  
Fang Miao ◽  
Li Feng
Keyword(s):  
Optical Networks ◽  
Bandwidth Allocation ◽  
Optical Network ◽  
Packet Delay ◽  
Propagation Delay ◽  
Passive Optical Network ◽  
Centralized Control ◽  
Allocation Scheme ◽  
Simulation Results ◽  
And Control

This paper proposes an alternative solution for Long-Reach Ethernet passive optical networks. The proposed scheme enables directly communication between ONUs for the transmission of local traffic and control messages, and each ONU calculates bandwidth allocation independently without participation of OLT to remedy the long propagation delay of LR-PON. This scheme also supports centralized control by OLT to change ONUs’ parameters synchronously. Simulation results show that this scheme can effectively reduce the end-to-end packet delay, while maintaining high throughput in uplink channel.

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