cognitive wireless network

By Admin on

cognitive network (CN) is a new type of data network that makes use of cutting edge technology from several research areas  to solve some problems current networks are faced with. Cognitive network is different from cognitive radio (CR) as it covers all the layers of the OSI model

cognitive process that can perceive current network conditions, plan, decide, act on those conditions, learn from the consequences of its actions, all while following end-to-end goals. This loop, the cognition loop, senses the environment, plans actions according to input from sensors and network policies, decides which scenario fits best its end-to-end purpose using a reasoning engine, and finally acts on the chosen scenario as discussed in the previous section. The system learns from the past (situations, plans, decisions, actions) and uses this knowledge to improve the decisions in the future.

Satellite networking

The convergence to all-IP based technology has led to major research in the same area related to satellite networking. The development of the future Internet is a very challenging task. Satellites will play a significant role in this future system and hence this is one of the major areas for research. Important topics include: integrated satellite, terrestrial, mobile and wireless networks, new services and applications such as public protection, disaster relief and management, as well as new technologies and broadband networks for ultra-high speed links.

Wireless Networks

Internet’s global importance grows and users demand access while mobile, wireless networks have been a major area of research for communications. Many different types of wireless network have been identified, each with their own technical requirements. Some of the more important categories are:

MANETs (mobile ad hoc networks): generic, self-organising networks where the devices form their own networking infrastructure;

VANETs (vehicular ad hoc networks):characterised by linear motion (along roads), with access to roadside devices;

WSNs (wireless sensor networks): typically stationary, often low power and low capability devices, often operating in power-saving mode and hence with only limited connectivity;

Intermittently connected networks (ICNs), sometimes also known as delay- or disruption-tolerant networks (DTNs): networks where an entire end-to-end path between two devices rarely or never exists, due to either a low density of nodes and/or large distances between devices.

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