The paper proposes a XOR-based network coded cooperation protocol for the uplink transmission of relay assisted cellular networks and an algorithm for selection and assignment of the relay nodes. The performances of the cooperation protocol are expressed in terms of network decoder outage probability and Block Error Rate of the cooperating users. These performance indicators are analyzed theore...

The development of wireless network technology and user demands for mobility support have motivated the IETF to introduce mobile IP, mobile IPv6, and its extension, the network mobility (NEMO) basic support protocol. In the NEMO environment, mobile networks form a nested structure. Nested mobile networks based on NEMO basic support (NBS) protocol have the pinball routing problem because packets...

Extensive research has been carried out in search for an efficient atomic commit protocol and many optimizations have been suggested to improve the two-phase commit protocol, either for the normal or failure case. Yet, the performance effects on transaction processing when combining some of these optimizations have not been studied in depth. In this paper, we concentrate on the flattening-of-th...

We present measurement approaches to evaluate performance optimizations, employed at different layers of the protocol stack, to enhance application performance over wide-area wireless networks (WWANs). Applications running over WWAN cellular environments (e.g web browsing) are significantly affected by the vagaries of the cellular wireless links. Much of the prior research has focussed on varie...

Mobile Internet Protocol has been proposed by IETF to support portable IP addresses for mobile devices that often change their network access points to the Internet. In the basic mobile IP protocol, datagrams sent from wired or wireless hosts and destined for the mobile host that is away from home, have to be routed through the home agent. Nevertheless, datagrams sent from mobile hosts to wired...

The configuration of a distributed storage system typically includes, among other parameters, the set of servers and their roles in the replication protocol. Although mechanisms for changing the configuration at runtime exist, it is usually left to system administrators to manually determine the “best” configuration and periodically reconfigure the system, often by trial and error. This paper d...

The Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) are the protocols used by hosts and multicast routers to exchange their IP multicast group memberships with each other. This document describes ways to achieve IGMPv3 and MLDv2 protocol optimization for mobility and aims to become a guideline for the tuning of IGMPv3/MLDv2 Queries, timers, and counter values.

CONCLUSION: The normothermic perfusion protocol has the potential to significantly impact outcomes in limb replantation and transplantation. Our results suggest that limbs in the 12-hours perfusion group retain better physiologic parameters at the end-point. However, the continuous optimization of the protocol allowed to maintain limb’s function and preserved peripheral perfusion for up to 44 h...

Vehicular Ad hoc Networks (VANET) are offset of Mobile Ad hoc Networks (MANET) made by vehicles communicating with each other. The special characteristic of VANET is high speed of nodes, so the time period of network is very small. Performing routing operation in such high dynamic network environment is difficult process. This work proposes cluster based Ant Colony Optimization routing in VANET...

This paper presents an adaptive PSO algorithm whose numerical parameters can be updated following a scheduled protocol respecting some known criteria of convergence in order to enhance the chances to reach the global optimum of a hard combinatorial optimization problem, such those encountered in global optimization problems of composite laminates. Some examples concerning hard design problems a...