IP Multimedia Subsystem (IMS) has resulted from the work of the Third Generation Partnership Project (3GPP) toward specifying an all-IP communication service infrastructure (24.229 2009). Mainly looking at the needs and requirements of mobile operators, the 3GPP first specified IMS as a service architecture combining the Internet’s IP technology and wireless and mobility services of current mob...

A Mobile Adhoc Network is a multihop self-configuring network without any fixed infrastructure of wirelessly connected devices. Due to node mobility and, dynamic topology, designing and implementing reliable routing in MANET is a major challenge. This paper provides the comparative performance analysis of DSR, AODV and DSDV. Different types of test scenarios have been designed with fixed number...

The integration of WiMAX and WLAN has been seen as a promising approach towards fourth generation (4G). Vertical handoff plays important role while integration of WiMAX and WLAN heterogeneous overlay systems. Vertical handoff is preformed on the basis of Quality of Service (QoS) metrics of the two heterogeneous networks. A Seamless handoff scheme is based on the tightly coupled architecture so ...

BACKGROUND DNA extraction from paraffin wax embedded tissue requires special protocols, and most described methods report an amplification success rate of 60-80%. AIMS To propose a simple and inexpensive protocol consisting of xylene/ethanol dewaxing, followed by a kit based extraction. METHOD Xylene/ethanol dewaxing was followed by a long rehydration step and a kit based DNA extraction ste...

Searching for other participants is one of the most important operations in a distributed system. We are interested in topologies in which it is possible to route a packet in a fixed number of hops until it arrives at its destination. Given a constant d, this paper introduces a new self-stabilizing protocol for the q-ary d-dimensional de Bruijn graph (q = d √ n) that is able to route any search...

In the paper, we propose a dynamic transmission scheduling protocol for multi-hop wireless networks by combining a fixed scheduling scheme with a simple p-persistent approach. In a fixed scheduling scheme, a predetermined schedule is assigned to each wireless node before transmitting data, and this schedule will be used permanently. However, in the proposed protocol, an adaptive probability-bas...

The advance of wireless and mobile technology introduces a new type of Video-on-Demand (VOD) systems, namely the mobile VOD systems, that provide VOD services to mobile clients. It is a challenge to design broadcasting protocols for such systems because of the following special requirements: (1) fixed maximum bandwidth requirement: the maximum bandwidth required for broadcasting a video should ...

Publish/Subscribe-based networks have emerged as suitable candidates for supporting new sort of devices in the Internet of Things. Despite this, there are few mobile broker models that integrate existing subscription and notification models while meet the requirements of these devices. The challenge of creating an uniform and loosely coupled content dissemination network of fixed and mobile dev...

Formal correctness of complex multi-party network protocols can be difficult to verify. While models of specific fixed compositions of agents can be checked against design constraints, protocols which lend themselves to arbitrarily many compositions of agents–such as the chaining of proxies or the peering of routers–are more difficult to verify because they represent potentially infinite state ...

A multiservice wireless Asynchronous Transfer Mode (ATM) access system is considered from a signaling protocol viewpoint. In an attempt to generalize and extend results and experiences obtained from the specification, design, and implementation of fixed ATM-based access networks, we extend the concept of the broadband V interface (referred to as VB) for application to wireless ATM access networ...