It is well-known that a single node in a network cooperates with one another employing cooperative communications can lead to transmission power saving. However, due to the additional processing power in receiving and retransmitting other’s information, not all nodes and cooperative protocols can achieve energy efficiency. To ensure energy efficiency of a cooperative network, a novel merge proc...

Multimedia traffic presents some special requirements that are unattainable with a best-effort service. Current interconnect standards provide mechanisms to overcome the limitations of the best-effort model, but they do not suffice to satisfy the strict requirements of video transmissions. This problem has been extensively addressed at the general networking community. Several solutions have ar...

The clouds (IP) versus strings (connection-oriented) debate over the Internet architecture is reexamined. Controllability and observability are shown to be the key to the performance (QoS) of the networks. The clouds architecture treats the network as a black box, making it uncontrollable and unobservable; in contrast, the strings architecture was designed to be a controllable and observable st...

In this paper, we deal with dynamic pricing strategies for connection-oriented services in wireless systems. Dynamic pricing policies allow the network operator to charge a cost per time unit depending on the network usage. In this way, the users behavior can be regulated and the network management is significantly improved. We model the user demand and the call duration as functions of the ser...

Most of the solutions proposed to support real-time (i.e. guaranteed performance) communication services in packet-switching networks adopt a connection-oriented and reservation-oriented approach. In such an approach, resource allocation and route selection decisions are made before the start of the communication on the basis of resource availability and real-time network load at that time, and...

Future wireless networks promise multimedia communication and computing services for both fired and mobile users. One of the most important challenges of wireless multimedia service for mobile users is maintaining a guaranteed quality of service over end-to-end connections with multiple mobile endpoints. In this papes we describe a new handoff rerouting scheme that supports multimedia trafic in...

Multiple classes of conventional and multimedia applications are expected to be supported by the emerging connection-oriented integrated-service networks, where bestefJort flows and quality-of-service (QoS) flows co-exist. We propose a novel two-level hierarchical scheduling algorithm, which provides an integrated, simple scheme to distribute the link bandwidth among a dynamic set of flows in t...

We propose an admission control scheme to guarantee a certain level of QoS to on-going connections in cellular networks. This admission control scheme is based on a differential bandwidth reservation policy that uses a sector of cells in making bandwidth reservation for accepting the new call. The sector of cells, which are located along the way to which the MT might move, are further divided i...