In this paper, the impact of mobility of both primary and secondary users on the performance of cognitive radio mobile cellular networks with real-time traffic is investigated. To this end, an algebraic set of mathematical expressions for the handed-off arrival rate, and new call blocking, forced termination, and interruption probabilities of secondary users are derived under the assumption tha...

As we know the wireless mesh network is playing a vital role in today’s network infrastructure. Wireless mesh networks (WMNs) have achieved significant development because of fast deployment, easy maintenance and low investment compared with traditional wireless networks. The structure of WMN consists of base stations, distribution system (backbone), links and the mobile stations. The issue is ...

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document analyzes the transition to IPv6 in Third Generation Partnership Project (3GPP) packet networks. These networks are based on General Packet Radio Service (GPRS) technology, and the radio network archite...

This paper proposes radio access selection algorithm for the next generation wireless networks. The proposed algorithm uses mobile terminal measurements from different radio access technologies within a given time interval, with aim to obtain information for multi criteria decision making between different access networks available to the terminal. The proposed algorithm uses fuzzy logic contro...

Estimating the position of mobile terminals is an important problem for cellular networks. A low cost method of locating the mobile terminal is to use measurements of the radio path loss. The distribution of radio path loss is, unfortunately, a non-linear function of the mobile terminal location. The non-linearity results from large obstacles to radio-wave propagation such as buildings or hills...

The Global Positioning System demonstrates the significance of Location Based Services but it cannot be used indoors due to the lack of line of sight between satellites and receivers. Indoor Positioning Systems are needed to provide indoor Location Based Services. Wireless LAN fingerprints are one of the best choices for Indoor Positioning Systems because of their low cost, and high accuracy, h...

Public mobile radio spectrum is a scarce resource while wide spectral ranges are only rarely used. Here, we consider a new strategy called Spectrum Pooling enabling public access to these new spectral ranges without sacrificing the transmission quality of the actual license owners. By temporarily leasing their spectrum during idle periods the license owners could tap new sources of revenue. We ...

In this paper a study on different transport channel scheme adoption is presented, available for 3G and 3.5G technologies, and its impact on a multi-service 3.5G mobile network in the presence of heterogeneous traffic with real time (RT) and non-real time (NRT) patterns. There are two fundamental aspects considered in this study, quality of service (QoS) and radio resource management (RRM) in o...

Radio resource allocation (RRA) is essential for providing quality-of-service (QoS) to users in wireless networks. In multimedia DS-CDMA networks, power and rate are key components of RRA. In this paper, we propose a dynamic power and rate joint allocation algorithm for mobile multimedia DS-CDMA networks based on utility functions. The purpose of the algorithm is to maximize utilities of all us...

Mobile and wireless technologies have evolved beyond recognition since the first radio signals were transmitted by pioneers including Nikola Tesla and Guglielmo Marconi in the late nineteenth century. Radio waves have been used since then as a basis for telephony, audio and video broadcast, and navigation and radar systems. More recently, the advent of mobile phones and similar devices has tran...