QLN QLN Domain A Mobile station A QGS Radio access network Radio access network Local IP network DiffServ itself lacks a simple and scalable bandwidth resource management scheme for a dynamic environment as an IP-based RAN. It is, therefore, necessary to extend DiffServ model for admission control and on-demand resource reservation under IP mobility environments.

Cellular networks are becoming increasingly complex. In coming years the introduction of third-generation networks will compound this situation. As a consequence, there is a need for simple or automated operation and maintenance (O&M), to decrease operators’ costs and to use hardware investments in the most effective way. Likewise, operators need customized functionality— a requirement that put...

Commoditization and virtualization of wireless networks are changing the economics of mobile networks to help network providers, e.g. Mobile Network Operator (MNO), Mobile Virtual Network Operator (MVNO), move from proprietary and bespoke hardware and software platforms towards an open, cost-effective, and flexible cellular ecosystem. In addition, rich and innovative local services can be effic...

In the past, wireless network reliability issues have received limited attention. Previously proposed solutions have focused on protection against base station failures, which may require significantly more base stations than necessary. Actual data from wireless carriers suggest that problems in the backhaul are the uttermost reliability problems faced, and is therefore the main focus of this w...

In comparison to existing 3G or 3G+ wireless systems, fourth generation (4G), long-term evolution (LTE) or mobile Wimax are characterized by higher bit rates, highly fluctuant traffic matrices and higher antenna’s density. Current backhauling techniques federating radio antennas are not suited to these new characteristics. Several investigations are carried out for the design of new generation ...

Network optimization strategies are core ingredients of radio access network planning for second and third generation mobile systems like GSM and UMTS. We present a combined approach for network topology optimization of the UMTS terrestrial radio access network (UTRAN) which considers the logical network structure as well as transport network aspects. We focus on including Point-to-Multipoint (...

The Self-Organizing Map (SOM) is an efficient tool for visualization and clustering of multidimensional data. It transforms the input vectors on two-dimensional grid of prototype vectors and orders them. The ordered prototype vectors are easier to visualize and explore than the original data. Mobile networks produce a huge amount of spatiotemporal data. The data consists of parameters of base s...

Cognitive radio (Mitola III, 2000) also known as opportunistic spectrum access (OSA) has emerged as a promising solution to increase the spectrum efficiency Haykin (2005). In OSA, the SU finds spectrum holes (white space) by sensing the radio frequency spectrum. The presence of spectrum holes in the PU channels are highlighted in Fig. 1. These spectrum holes are used by the SU for its transmiss...

Finland, among the first to adopt mobile broadband services, faces rapid growth of mobile data traffic. Therefore, Finnish mobile operators continually invest in their radio access networks to handle this growth, which represents an attractive revenue source. This study presents a demand curve estimate for mobile broadband data traffic, which takes into account the impact of technology evolutio...