QLN QLN Domain A Mobile station A QGS Radio access network Radio access network Local IP network DiffServ itself lacks a simple and scalable bandwidth resource management scheme for a dynamic environment as an IP-based RAN. It is, therefore, necessary to extend DiffServ model for admission control and on-demand resource reservation under IP mobility environments.

The development toward programmatic operation and control of 5G networks is a compelling and technically challenging task. A fundamental component is the capability of exposing and controlling the network state across heterogeneous equipment in a unified manner. In this paper, we outline the COHERENT approach to network abstractions enabling unified representation and programming of heterogeneo...

The Adaptive Ad-hoc Free Band Wireless Communications (AAF) project is researching the possibility of using Software Defined Radio for wireless networks that needs to operate in an unknown or even hostile radio environment. Each node in the network needs to be cognitive of nearby transceivers in order to prevent radio frequency interference from and to other users and to survive jamming. So, in...

The traditional network is layered designed. Most network architectures of the radio network are also layered. There are four layers for the radio networks, the physical layer, the link layer, the network layer and the application layer. In the layered design, each layer just is responsible for its own task. This can make the design more easily, and the network architecture adapted more applica...

The rapidly increasing traffic demand from mobile users forces network operators and service providers to extend and optimize existing networks as well as to plan entirely new mobile radio networks. Current planning methods rely on static coverage prediction. The optimization is partly based on measurements and gathered experiences in connection with empirical methods. However, these methods do...

In this paper, we investigate how Cognitive Radio as a means of communication can be utilized to serve a smart grid deployment end to end, from a home area network to power generation. We show how Cognitive Radio can be mapped to integrate the possible different communication networks within a smart grid large scale deployment. In addition, various applications in smart grid are defined and dis...

Due to the coexistence of different Radio Access Technologies (RATs), Next Generation Wireless Networks (NGWN) are predicted to be heterogeneous in nature. The coexistence of different RATs requires a need for Common Radio Resource Management (CRRM) to support the provision of Quality of Service (QoS) and the efficient utilization of radio resources. RAT selection algorithms are part of the CRR...

In this paper we study the gossiping problem (all-to-all communication) in radio networks where all nodes are aware of the network topology. We start our presentation with a deterministic gossiping algorithm that works in at most n units of time in any radio network of size n. This algorithm is optimal in the worst case scenario since there exist radio network topologies, such as lines, stars a...

A routing protocol is the nervous system of any computer network. In a network where hundreds or thousands of nodes are working simultaneously, the job of a routing protocol is to identify or discover one or more path connecting a pair of nodes under a given set of constraints. The prime requirement for a routing protocol is to optimize the network performance. Ad hoc networks form a distinct c...