ANALYSIS OF HIERARCHICAL CELLULAR NETWORKS WITH MULTIMEDIA SERVICES AND DIFFERENT USER MOBILITY PATTERNS

2000 ◽  
Vol 01 (03) ◽  
pp. 267-282 ◽  
Author(s):  
MICHELA MEO ◽  
MARCO AJMONE MARSAN

We describe a technique for the approximate performance analysis of cellular mobile communication networks based on a FDMA/TDMA scheme (such as GSM) in which the utilization of two separate frequency bands leads to a complex cellular structure with overlapping microcells and macrocells. The analysis technique is based on Markovian assumptions as regards both the traffic flows entering microcells and macrocells and the user mobility pattern, as well as an assumption of flow balance between handovers into and out of any cell. The model is validated against simulation results for various scenarios, and shown to provide accurate predictions. The performances of many different system configurations are then evaluated and compared using the analytical approach.

Author(s):  
Е.Е. ДЕВЯТКИН ◽  
М.В. ИВАНКОВИЧ ◽  
С.В. ШВЕЦ ◽  
Т.А. СУХОДОЛЬСКАЯ

Представлен подход к формированию порядка определения и применения показателей и индикаторов стадий жизненного цикла поколений сетей подвижной связи (СПС) в их эволюционном развитии. Подтверждена необходимость использования этих инструментов в решении прикладных вопросов регуляторного, нормативно-правового и других видов обеспечения для упреждающей разработки мероприятий, обуславливающих возможность внедрения СПС с учетом сложившихся национальных регуляторных процедур. Показана взаимообусловленная связь и приведено соотношение поколений СПС с поколениями социотехнических систем. An approach to the formation of the procedure for determining and applying indexes and indicators of the stages of the life cycle of generations of cellular mobile communication networks in their evolutionary development is presented. It is shown that it is necessary to use these indexes and indicators in solving applied issues of regulatory and other types of support to enable the proactive development of measures that determine the possibility of implementing the mobile networks, taking into account the existing national regulatory procedures. A mutually dependent relationship is presented, and the ratio of generations of mobile communication networks with generations of socio-technical systems is given.


2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Wolfgang Mennerich ◽  
Michael Grieger ◽  
Wolfgang Zirwas ◽  
Gerhard Fettweis

For today's cellular mobile communication networks, the needed capacity is hard to realize without much more of (expensive) bandwidth. Thus new standards like LTE were developed. LTE advanced is in discussion as the successor of LTE and cooperative multipoint transmission (CoMP) is one of the hot topics to increase the system's capacity. System simulations often show only weak gains of the signal-to-interference ratio due to high interference from noncooperating cells in the downlink. This paper presents an interference mitigation framework to overcome the hardest issue, that is, the low penetration rate of mobile stations that can be served from a cluster composed of their strongest cells in the network. The results obtained from simulation tools are discussed with values resulting from testbed on the TU Dresden. They show that the theoretical ideas can be transferred into gains on real systems.


Author(s):  
Ali Diab ◽  
Andreas Mitschele-Thiel

The 5th Generation (5G) of mobile communication networks is being developed to address the demands and business contexts of 2020 and beyond. Its vision is to enable a fully mobile and connected society and also to trigger socio-economic transformations in ways eventually unimagined today. This means that the physical world to be covered with planned 5G networks including communication networks, humans and objects is becoming a type of an information system. So as to improve the experience of individuals, communities, societies, etc. within such systems, a thorough comprehension of intelligence processes responsible of generating, handling and controlling those data is fundamental. One of the major aspects in this context and also the focus of this chapter is the development of novel methods to model human mobility patterns, which have crucial role in forthcoming communication technologies. Human mobility patterns models can be categorized into synthetic, trace-based and community-based models. Synthetic models are largely preferred and widely applied to simulate mobile communication networks. They try to capture the patterns of human movements by means of a set of equations. These models are traceable, however, not capable of generating realistic mobility models. The key idea of trace-based models is the exploitation of available measurements and traces achieved in deployed systems to reproduce synthetic traces characterized by the same statistical properties of real traces. A main drawback of trace-based modeling of human patterns is the tight coupling between the trace-based model and the traces collected, the network topology deployed and even the geographic location, where the traces were collected. This is why the results of various trace-based models deviate clearly from each other. Sure, this prohibits the generalization of trace-based models. When one also considers that the traces themselves are rarely available, one can understand why synthetic models are preferred over trace-based ones. Community-based modeling of human movements depends on the fact stating that mobile devices are usually carried by humans, which implies that movement patterns of such devices are necessarily related to human decisions and socialization behaviors. So, human movement routines heavily affect the overall movement patterns resulting. One of the major contributions in this context is the application of social networks theory to generate more realistic human movement patterns. The chapter highlights the state of art and provides a comprehensive investigation of current research efforts in the field of trace- and social-based modeling of human mobility patterns. It reviews well-known approaches going through their pros and cons. In addition, the chapter studies an aspect that heavily relates to human mobility patterns, namely the prediction of future locations of users.


Sign in / Sign up

Export Citation Format

Share Document