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To provide support for both data and voice is essential requirement of present mobile networks both LTE and UMTS networks. The proposed scheme in this paper differentiates assignment of requested calls on: speed, direction of motion and type of requested call. It also checks the used capacity threshold of LTE and UMTS before assignment. Different communication interfaces are used in hybrid mobile...
In this paper an experimental performance analysis of the second, third and fourth generation of public mobile networks is presented. The voice and data services are tested and quality of service parameters are considered in the analysis. Measurements are performed in indoor environment and real microcell of the specific radio technology is analysed. QualiPoc measuring software on the mobile phone,...
The paper introduces the future wireless network capacity trend and the corresponding spectrum challenges. Serial maximization spectrum efficiency solutions are proposed, Finally a successful deployment commercial case is summarized.
In this work, we show that there are two effects impacting cellular networks owned by an operator as a consequence of the application of the green networking via Sleep Modes (SMs) state to Base Stations (BSs). On one side, it is possible to save money from the electricity bill by exploiting SMs. On the other hand, however, the SM state triggers a variation in the failure rate of the BS, and therefore...
A number of protection criteria were implemented by the Swedish regulator PTS in order to protect the GSM-R operations in Sweden. In order to protect the GSM-R receivers from interference and blocking, two different constraints were implemented: First, a limitation of the "out-of-band" emissions from the mobile operators' existing base stations operating in the 900MHz band was implemented...
As a natural limited resources, the radio frequency spectrum should be managed and used as efficiently as possible. The Government as regulator has a responsibility to manage and regulate the spectrum to prevent interference. One example of the many problems in Indonesia that must be solved is the spectrum in 2.1 MHz frequency band for 3G services. The CDMA 2000 and UMTS system occupy adjacent band...
This paper highlights inter-cell and inter-operator interference which can occur within a UTRA-TDD system. Interference simulation results show that when the network has frame synchronisation and operates with the same asymmetry in all cells, there will be interference between the base stations and adjacent mobiles only (i.e. MS-BS and BS-MS interference). When synchronisation is lost, or different...
Driven by a combination of flat lining revenues and an explosive growth in the mobile data traffic and hence the need for network resources, mobile operators consider infrastructure-and spectrum sharing as a means to reduce operational costs. We develop and apply an assessment approach to quantify the benefits associated with spectrum sharing in an infrastructure-shared environment, and estimate the...
This paper presents a new proposal for the unified evaluation of ultra wideband and narrowband radio communication systems electromagnetic compatibility, called “compatibility region”. The idea of compatibility region is based on the relation between the ratio of narrowband to ultra wideband signal power in a receiver and some transmission quality indicators (bit error rate, effective data rate).
Enterprise femtocell deployments present numerous design challenges for network operators due to their high density, poor radio environments, and mixture of public and private users. Among these challenges, femtocell pilot management is particularly important due to its potential impact on both femtocell and macrocell users. Femtocell pilots determine femtocell coverage, but must be designed with...
Handover is the main technique that is responsible for the mobility management in the cellular network. The decisions of handover from each cell is only limited to a certain number of cells called neighbors and the list that contains these neighbors is called the neighboring cell list (NCL). Improper construction of NCL may result in either missing some important neighbors or choosing unnecessary...
This paper describes some of the new developments of the SEAMCAT software. In particular, a detailed description of the implementation of CDMA (Code Division Multiple Access) UL (Uplink) enabling compatibility between CDMA system with single or clustered interfering systems.
Long Term Evolution (LTE) is a standard for wireless communication of high speed data for mobile phones and data terminals. LTE is capable of delivering large data rate on the order of several megabits per second, which is even larger than the current 3G systems. This is very challenging as the wireless networks are subjected to interference, multipath and poor propagation channel characteristics...
The use of commercial off-the-shelf (COTS) technologies in military environment is attractive, but in tactical communications, one of the biggest challenges is the jamming/interference tolerance of the deployed systems. Interference tolerance is important also in public authority and in some special civilian wireless network set-ups. We present an experimental measurement-based study on jamming tolerance...
The objective of this study is to devise novel cognitive interference identification techniques for UMTS and LTE networks. We apply machine learning techniques to reconstruct interference patterns using a priori system knowledge, limited user information and sparse pathloss and interference measurements. The obtained interference patterns are used to build a multi-RAT optimization procedure aiming...
This paper presents verifications for UMTS coverage and capacity in a live network using planning and performance tools applied to a real-world operational UMTS network. Case study results are presented and followed by comparisons between coverage predictions, capacity simulations, field measurements and system statistics. Tuned propagation models based on area clutter, population profiles, digital...
This paper deals with the effect of deploying femtocells into conventional networks like UMTS and new systems like LTE. Femtocells are a cost efficient way to extend the coverage and capacity in a house or a flat. However if the number of femtocells exceed the maximum acceptable level the interference makes the whole system unusable. The article characterizes the downlink interferences in both systems...
In this paper a static network simulator is used to find downlink and uplink SHO areas. By introducing a penalty-based objective function and some hard constraints, we formally define the problem of balancing SHO areas in UMTS networks. The state-of-the-art mathematical model used and the penalty scores of the objective function are set according to the configuration and layout of a real mobile network,...
The present state of the art research in WCDMA & mobile technologies, and analysis of improve capacity and coverage increase with repeaters in (3G) universal mobile telecommunication systems (UMTS) of study & investigated in rural area and semi urban area (Bijnor and Muzaffarnagar, UP) India. The proposed to use increase system information capacity in rural and semi-urban areas, where is at...
Pilot power management is an important issue for coverage planning in UMTS systems. We consider the problem of minimizing the pilot power subject to the constraint of full service coverage. For this planning problem, which is NP-hard in complexity, effective methods being able to deal with large-scale networks of heterogeneous cell coverage patterns are highly desirable. We propose an integer linear...
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