The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Contemporary radio access networks, are commonly utilizing static configuration and deployment, and are inefficient in handling any spatio-temporal fluctuations of the traffic demand. Cloud RAN represents a novel centralized technology based on virtualization technology that can efficiently addresses the problems of legacy networks. Cloud RAN facilitates high data rates and high network and PHY layer...
This paper showcases the vulnerabilities in the GSM security architecture through implementation of an active attack at the Um interface. The attack was carried out by taking advantage of lack of two-way authentication. A rogue GSM base transceiver system was established using Universal Software Radio Peripheral (USRP) B200 board and OpenBTS. B200 allows relaxation of an external 10 MHz reference...
Handover is the process of transferring services from a Base Station (BS) to another BS. It is one of the key performance index for the mobile communication system. The success of the handover impact to increase the performance of services. Handover failures will impact to decrease the performance. This paper will discuss the analysis and improvement of handover failures. The case study of this research...
We present the development and testing of a cellular network built on open source technologies. This network supports voice calls and text messages within the network or between networks. The main objective of this work is to develop a stand-alone mobile network consisting of one base station and a switch, the access to which can be controlled as required. The mobile network is also connected to public...
Self-Healing is one of the key important functionalities in self-organizing mobile communication networks. Despite its importance, self-healing has yet to receive a deserving research attention in the literature. This paper considers important quality indicators in a live mobile communications network and presents an automatic unified detection and diagnosis framework to identify root causes of faults...
Along with correspond by letter the development of the profession, the wireless signal blast-off the station is gradually small scaled to turn and easily operate. It results in the illegal member made use of it to carry out to break the law the crime activity, influencing the people to usually produce the living work. The want for is related to examine and position the equipment in fight break the...
In this paper, we have proposed a cost effective method for rapid restoration of wireless connectivity in disaster hit areas, which face large scale failure of wireless infrastructure. This method includes setting of a reconfigurable Base Transceiver Station (BTS) based on Software Defined Radio (SDR) technology. The setup covers the drawbacks of existing methods for establishing connectivity in disaster...
The basic functionalities of mobile network (voice service and mobility) do not satisfy all user requirements in the network. Thus the evolution of GSM was inevitable, as well as the emergence of user-oriented services. In this paper, implementation of a web service using USRP hardware device combined with OpenBTS software is described and analyzed.
An enhanced OpenBTS is implemented. OpenBTS is a software-based GSM access point, allowing standard GSM-compatible mobile phones to make phone calls without depending on existing telecommunication providers' networks. In this paper, the goal was to improve the design of the OpenBTS system by improving the sensitivity and also minimizing the cost of the whole system. So far, we implemented a base station...
The paper proposes the integration of new cognitive capabilities within the well known OpenBTS architecture in order to make the system able to react in a smart way to the changes of the radio channel. In particular, the proposed spectrum sensing strategy allows the OpenBTS system to be aware of other active transmissions by forcing to choose a new radio channel, within the GSM frequency band, when...
Mobile telephony and mobile communication are both crucial and critical infrastructures for today's society and contribute to its security and safety. In contrast to landline telephony with its physically protectable medium, mobile telephony utilizes air and electromagnetic waves as communication medium, which cannot be easily protected. Due to the specific design and the openly shared medium, mobile...
IExchange is a new technology in the Motorola iDEN system. It transmits data packets over the dispatch channel and achieves very high efficiency multicast of messages. An investigation was done based on the published technical documents from Motorola. As an output of the investigation, this paper discusses the mechanism of this technology, compares it with technologies providing similar services and...
Based on analysis on applications by perception control technology in computer network security status and security protection measures, from the angles of network physical environment and network software system environmental security, this paper provides network security system perception control solution using Internet of Things (IOT), telecom and other perception technologies. Security Perception...
With the increase in ever demanding requirements of telecommunications, especially, wireless and mobile communications, the simultaneous access to services of various mobile service providers is very important. The provision of such simultaneous access to services can be made possible by handling multiple subscriber identity modules (SIM) at a time. In this paper, we have proposed a framework to introduce...
Re-farming of 900 MHz band into HSPA has been started and is likely to happen later with LTE. Typically operators have less than 10 MHz block of 900 MHz spectrum and therefore co-existence of two systems in that band is causing challenges. One of the major issues is the high GSM voice traffic that will remain in the GSM network. How to cope the same traffic with significantly less bandwidth for GSM?...
OSC (Orthogonal Sub Channel) is an enhancement for the GSM voice traffic. It provides up to double capacity in the GSM radio interface with the same hardware compared to the previous GSM Half Rate (HR) mode. This paper investigates the effects of the OSC on the capacity utilization compared to the GSM HR as function of the OSC capable handset penetration. The variation of the radio network capacity...
A fully reconfigurable radio is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. Software defined radio is a common hardware platform for multi standard communication that is controlled by software. The goal of the software defined radio...
With the development of mobile communication technologies and the popularity of relating devices, mobile learning (M-learning) system has been used more and more widely. But most of existing M-learning systems have built on mobile platforms whose interfaces don't open to general education institutions. This limits M-learning application. In view of this, a novel mobile auxiliary learning system, called...
In the recent years the Location Based Services (LBS) are grabbing the attention of telecommunication actors since they are sources of new services and new revenues. The main challenge in the LBS domain is the localization of the mobile terminals within a certain accuracy. To this end, several radio positioning techniques have been introduced, one of which is the Location Fingerprinting. Although...
In wireless communication system applying the minimum mean square error (MMSE) as its equalization algorithm, the equalizer is one of the most critical part in terms of the computational complexity of the baseband signal processing. Hence more efficient algorithm implementing MMSE equalizer is needed to save power consumption and reduce the hardware complexity. In this paper, we implement the recursive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.