Two-tier cellular networks provide an enhanced use of the networks' resources for both high and low speed users. However, they cause an increase in the number of handoffs between cells due to having smaller cell sizes in the microcell tier. An effective approach used to prevent the dropping of ongoing calls in a network is delaying these calls in a queue until a channel becomes available. In th...

Collectives are an important component of parallel programs, and have a significant impact on performance and scalability of an application. To obtain best performance, platform specific implementations of various parallel programming frameworks, such as MPI and Charm++, are done. As a result, when systems with new network topologies are built, new topology aware algorithms for collectives are ...

This paper discusses the key requirements that IT organizations should consider when building a network. In brief, the network should provide high availability, voice-quality network connections, comprehensive security and ease of management and operations. We will introduce the concept of the two-tier architecture as a way to effectively achieve these four stated requirements and the benefits ...

The demands for traffic and services through the mobile networks are ever increasing. Multi-tier has become a major trend in the design of new generations of mobile networks such as advanced long term evolution ( LTE-A) networks in order to support the high capacity demand required for multiservice traffic in wireless networks. Picocell emerged as one of the key radio access techniques for LTE-...