Aspects of capacity enhancement techniques in cellular networks

Frequency spectrum is the scarce resource. From mobile operator’s point of view, efficient utilization of the radio resources is needed while providing maximum coverage, and ensuring good quality of service with minimal infrastructure. In high capacity demanding areas, multilayer networks with multiband and multi radio access technologies are deployed, in order to meet the capacity requirements. In his doctoral thesis, Usman Sheikh has proposed a “Smart Traffic Handling” strategy, which is based on user’s required service type and location. Smart traffic handling scheme efficiently utilizes the different layers of the network, balances the load among them, and improves the system capacity. Power resources at base station are also limited. Usman Sheikh’s proposed “Power Control Scheme for High Speed Downlink Packet Access (HSDPA) network” improves the cell edge user experience, while maintaining the fairness among the other users in a cell. With the help of a proposed power control scheme, a user far from the base station can also enjoy the better quality of service. Generally, mobile operators use macro cells with wide beam antennas for wider coverage in the cell, but future capacity demands cannot be achieved by using only them. “Higher Order Sectorization” is one possible way to increase the system capacity. Usman Sheikh proposed new network layouts called “Snowflake” and “Flower” tessellations, for 6-sector and 12-sector sites, respectively. These tessellations can be used as a basis for making a nominal network plan for sites with higher order sectorization. These tessellations would be helpful for simulation purposes. Through his work, he has also tried to highlight the importance of deploying “Adaptive MIMO Switching” in Long Term Evolution (LTE) system, the fourth generation of wireless networks. In future, the fifth generation of wireless networks is expected to offer thousand times more capacity compared to LTE. The novel concept of “Single Path Multiple Access (SPMA)” given by Usman Sheikh is a revolutionary idea, and gives a possibility to increase the system capacity by a giant margin. SPMA can be considered as a right step towards 5G technology. Usman Sheikh’s work is of high importance not only from mobile operator’s point of view; rather his contributions to the scientific community will also lead to better user (customer) experience. His work will definitely benefit the mankind in utilizing the limited resources in an optimum and efficient way

ADVANCED ANTENNA TECHNIQUES AND HIGH ORDER SECTORIZATION WITH NOVEL NETWORK TESSELLATION FOR ENHANCING MACRO CELL CAPACITY IN DC-HSDPA NETWORK

ABSTRAC

Impact of Femtocell backhaul limitation on performance of Macro-Femto HetNet

This thesis is a techno-economical study which focuses on addressing the exponentially rising data capacity demand through network densification. The study is based on the two popular deployment strategies; Macrocellular networks and Macro-Femto heterogeneous networks, deployed in a suburban type environment with modern houses. The main aim of the dissertation is to investigate the impact of network densification on capacity, energy- and cost-efficiency of the network, while considering different femtocell backhaul connectivity limitations. The network performance is evaluated for both indoor and outdoor scenarios. A comparative analysis between the macrocellular and macro-femto network is done by increasing the density of the macrocells, femtocells and the operating frequency spectrum. The capacity is enhanced by increasing the density of the cell sites in the network but operators want to generate profit and want to adopt a cost effective solution to cater the problems. The results show that increasing the density of low-cost, low-powered femtocell access points (FAPs) in the network can solve the problem of 1000x future data capacity demand while keeping the CAPEX and OPEX of the network relatively lower than legacy pure macrocellular deployments. The deployment of the FAPs both in indoor and outdoor environments enhances the network capacity. This study helped in providing results, understanding and insight of both technical and techno-economical aspects of different mobile network deployment and densification solutions. Furthermore, the outcome of the thesis will give some guidelines for network vendors and mobile operators in evolving their network in future

Assessment of 3GPP macro sensor network in disaster scenarios

The effective and efficient use of communication technologies during the disaster sce-narios is vital for the relief and rescue works as well as for the disaster affected people. During the disaster scenarios, links between the Radio Access Network (RAN) and the Core Network (CN) might be broken in the disaster affected areas. If the link between such affected eNodeBs can be established, the data from the user can be transported to the network via node-to-node communication. Thus, this utilization of cellular mobile networks for the communication during such scenarios can be a key technological achievement. The goal of this thesis is to study the possible realization of the BS of the mobile network as a sensor node during the disaster scenarios for the detection of such scenari-os and to study the possible implementation of the node-to-node communication be-tween the BSs for the reliable delivery of the user data to the network. This thesis exam-ines the possibility of this inter-node communication for 3rd Generation Partnership Pro-ject (3GPP) Long Term Evolution (LTE). The merits of the LTE technology and its specifications have been deeply studied. The calculation in the analysis part shows that node-to-node communication is pos-sible in LTE. A probable frequency reuse plan for the node-to-node communication, which is proposed in this thesis, is a result of the bandwidth scalability property of LTE. The result from the theoretical analysis shows that Signal to Interference plus Noise Ra-tio (SINR) of 5.92 dB can be achieved during such communication. This SINR value can support Quadrature Phase Shift Keying (QPSK) modulation technique with 3/4 or 4/5 code rate for the bandwidth of 2.5 MHz. The Multiple-Input Multiple-Output (MIMO) technology in the LTE specification helps to provide additional increase in the data rates. The simplest communication mode can provide the data rates of 1.86 Mbps whereas 4 x 4 MIMO can provide up to 7.5 Mbps. Further, the proposed framework can be considered as the base for the implementation of node-to-node communication. This master thesis work has considered LTE as a communication technology for the study of a probable communication technology during the disaster scenarios. The flexi-bility in the utilization of the bandwidth in LTE provides the possibility for the node-to-node communication. The utilization of frequency band in Global System for Mobile Communication (GSM) also provides the possibility for the node-to-node communica-tion as well. However in Universal Mobile Telecommunication System (UMTS), the frequency band is the limitation for implementing the node-to-node communication. In UMTS, the interference will be very high because of the 5 MHz fixed frequency band implementation

Assessment of 3GPP macro sensor network in disaster scenarios

The effective and efficient use of communication technologies during the disaster sce-narios is vital for the relief and rescue works as well as for the disaster affected people. During the disaster scenarios, links between the Radio Access Network (RAN) and the Core Network (CN) might be broken in the disaster affected areas. If the link between such affected eNodeBs can be established, the data from the user can be transported to the network via node-to-node communication. Thus, this utilization of cellular mobile networks for the communication during such scenarios can be a key technological achievement. The goal of this thesis is to study the possible realization of the BS of the mobile network as a sensor node during the disaster scenarios for the detection of such scenari-os and to study the possible implementation of the node-to-node communication be-tween the BSs for the reliable delivery of the user data to the network. This thesis exam-ines the possibility of this inter-node communication for 3rd Generation Partnership Pro-ject (3GPP) Long Term Evolution (LTE). The merits of the LTE technology and its specifications have been deeply studied. The calculation in the analysis part shows that node-to-node communication is pos-sible in LTE. A probable frequency reuse plan for the node-to-node communication, which is proposed in this thesis, is a result of the bandwidth scalability property of LTE. The result from the theoretical analysis shows that Signal to Interference plus Noise Ra-tio (SINR) of 5.92 dB can be achieved during such communication. This SINR value can support Quadrature Phase Shift Keying (QPSK) modulation technique with 3/4 or 4/5 code rate for the bandwidth of 2.5 MHz. The Multiple-Input Multiple-Output (MIMO) technology in the LTE specification helps to provide additional increase in the data rates. The simplest communication mode can provide the data rates of 1.86 Mbps whereas 4 x 4 MIMO can provide up to 7.5 Mbps. Further, the proposed framework can be considered as the base for the implementation of node-to-node communication. This master thesis work has considered LTE as a communication technology for the study of a probable communication technology during the disaster scenarios. The flexi-bility in the utilization of the bandwidth in LTE provides the possibility for the node-to-node communication. The utilization of frequency band in Global System for Mobile Communication (GSM) also provides the possibility for the node-to-node communica-tion as well. However in Universal Mobile Telecommunication System (UMTS), the frequency band is the limitation for implementing the node-to-node communication. In UMTS, the interference will be very high because of the 5 MHz fixed frequency band implementation

XIII Jornadas de ingeniería telemática (JITEL 2017)

Las Jornadas de Ingeniería Telemática (JITEL), organizadas por la Asociación de Telemática (ATEL), constituyen un foro propicio de reunión, debate y divulgación para los grupos que imparten docencia e investigan en temas relacionados con las redes y los servicios telemáticos. Con la organización de este evento se pretende fomentar, por un lado el intercambio de experiencias y resultados, además de la comunicación y cooperación entre los grupos de investigación que trabajan en temas relacionados con la telemática. En paralelo a las tradicionales sesiones que caracterizan los congresos científicos, se desea potenciar actividades más abiertas, que estimulen el intercambio de ideas entre los investigadores experimentados y los noveles, así como la creación de vínculos y puntos de encuentro entre los diferentes grupos o equipos de investigación. Para ello, además de invitar a personas relevantes en los campos correspondientes, se van a incluir sesiones de presentación y debate de las líneas y proyectos activos de los mencionados equiposLloret Mauri, J.; Casares Giner, V. (2018). XIII Jornadas de ingeniería telemática (JITEL 2017). Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/97612EDITORIA