This research is motivated by the recent developments in the Internet Engineering Task Force (IETF) to support seamless integration of moving networks deployed in vehicles to the global Internet. The effort, known as Network Mobility (NEMO), paves the way to support high-speed Internet access in mass transit systems, e.g. trains, buses, ferries, and planes, through the use of on-board mobile ro...

In this paper, we investigate a specific interdomain traffic engineering problem: the outbound load balancing in a multi-homed Autonomous System (AS). We present an optimization-based approach for this problem without modifying BGP protocol in any way. In this approach, the load balancing problem is generalized as a black-box optimization problem. The Online Simulation system [1], specifically ...

Sensors in a wireless sensor network (WSN) are prone to failure, due to the energy depletion, hardware failures, etc. Fault tolerance is one of the critical issues in WSNs. The existing fault tolerance mechanisms either consume significant extra energy to detect and recover from the failures or need to use additional hardware and software resource. In this paper, we propose a novel energy-aware...

The current wireless communication system in Iraq faces several challenges during users’ handoff, especially with the fast growth of users and demands. This is also a global issue; therefore, quality service (QoS) measures have rapidly become more important developed over years. complexity between diverse applications underlying QoS architectures leads to these deployment problems, which decrea...

Today’s Internet availability is low, despite the efforts of organizations to improve failure resilience through multi-homing. In this paper, we analyze where and how much exposure to topology is needed to best improve availability without sacrificing scalability. Through this analysis, we find that exposing choice of the first and last AS hops between multi-homed AS pairs can almost always pro...

Air pollution, especially haze pollution, is creating health issues for both humans and other animals. However, remarkably little is known about how animals behaviourally respond to air pollution. We used multiple linear regression to analyse 415 pigeon races in the North China Plain, an area with considerable air pollution, and found that while the proportion of pigeons successfully homed was ...

The notion of service overlay network (SON) was proposed recently to alleviate difficulties encountered in providing end-to-end quality of service (QoS) guarantees in the current Internet architecture. The SONs are able to provide QoS guarantees by purchasing bandwidth from individual network domains and building a logical end-to-end data delivery infrastructure on top of existing Internet. In ...

Recently, the number of multi-homed hosts is getting large, which are equipped with multiple network interfaces to support multiple IP addresses. Although there are several proposals that aim at bandwidth aggregation for multi-homed hosts, few of them support mobility. This paper proposes a new framework called AMS: Aggregate-bandwidth Multi-homing Support. AMS provides functions of not only ba...

This paper presents a case study of designing resilient backbone network for supporting IPTV services within a single network provider. We first introduce the architecture and the characteristics of IPTV traffic. We then explore the design space in terms of IP versus optical technologies, huband-spoke versus meshed service layer topology, dual-homed versus ring access, use of multicast, routing...

Google’s Ads Data Infrastructure systems run the multibillion dollar ads business at Google. High availability and strong consistency are critical for these systems. While most distributed systems handle machine-level failures well, handling datacenter-level failures is less common. In our experience, handling datacenter-level failures is critical for running true high availability systems. Mos...