Actuality of theme

Now the system of generation of 3g allows the operators of cellular to give unlimited off-wire multimedia-services, for example, mobile television, viewing of Web-page, access to the corporate networks, extended vocal services.
In the work I examine the standard of UMTS. He was developed on the basis of most widespread technologies of mobile communication of GSM and has all of prospects to become the indeed global standard of the personal multimedia-connections. Therefore development of plans of introduction of technologies of the third generation on the initial stage of its development for existent cellular communication networks in the large cities of Ukraine is interesting problem.

Connection work with the scientific programs, plans, themes

Work is part of researches, conducted on the department of AT DONNTU, in accordance with the scientific programs and developments.

Aims and research tasks

The purpose of this work is an improvement of methods planning of network of 3go generation of UMTS on the early stage of its development and functioning jointly with an existent cellular communication of GSM network for the terms of seashore city - port on an example Mariupol. The followings tasks must be decided thus:

1. determination of market of potential users of network of UMTS in Mariupol on the early stage of its planning;
2. determination of volumes of traffic of the designed cellular network, utilizing information about subscribers, services by them in-use and character of traffic;
3. development of flow diagram of network;
4. determination of carrying capacities of all of areas of network;
5. development of functional diagram of network;
6. choice of equipment, development of connecting charts

Methodology and methods of researches

Method of calculation of area of radio coverage on a model peasant's Hut. Method of optimization of topology of network of transmission on the algorithms of search of the shortest tree and determination of maximal stream, such as algorithms, Prima, Kraskala, Fogelya and other

Scientific novelty of the got results

The method of calculation of area of radio coverage of cellular communication of UMTS network got further development for the terms of seashore city - port on an example Mariupol.

Practical value of the got results

The developed method can be utilized for the calculation of area of radio coverage of cellular communication of UMTS network for middle and large cities - ports of Ukraine.

Approbation of job performances

Basic job performances on V scientifically - to the practical conference Donbas - 2020 prospects of development of youths of scientists eyes, which was conducted in Donetsk, Donntu from 25 to May, 27, 2010.

Review and researches on the topic

1. 3g In EUROPE: MOBILE FUTURE OF TECHNOLOGY. Jeff Belk article in a library
2. Experiments with 3G. Pavel Ivanov.article in a library
3. Future communication of 3g and NGN networks.Ludmila Starikova article in a library

Short consideration of basic parameters of UMTS

UMTS is the system of plural access with the code demultiplexing and direct expansion of spectrum (DS -cdma), I.e. the bats of information of user are passed in the wide bar of frequencies by multiplying of initial flow of data of user by the sequences of bits (urgent chips), being codes expansions of CDMA. For providing of very high-rate of transmission (to 2 Mbit/s) the use of variable coefficient of expansion
UMTS supports the most different rates of data user, in other words, conception of receipt of B. on call of sufficient is well supported. Frames are selected every user by duration 10 ms, during each of which the rate of data user remains permanent. However much a carrying capacity for communication of data for an user can change from a frame to the frame. A rapid selection a carrying capacity for a radio contact will be usually managed a network for achievement of maximal carrying capacity at communication of the palletized data.
The air interface of UMTS is planned so that the operator of network can utilize perspective conceptions of construction of receivers of CDMA, for example reception and application of intellectual adaptive aerials as a method of increase of carrying capacity area of scope. Possibilities of the use of such conceptions of construction of receiver absent in most systems of the second generation, and they either can not be used as a result or can be used only with large limitations and give the insignificant improvement of operating indexes only.
UMTS is intended for the use together with GSM. The token passing of management is therefore supported between GSM and MTS in an order to be in a position to utilize the area of scope of GSM for introduction of UMTS.

Chart of the developed network of UMTS for terms Mariupol

Description of the got and planned job performances

General amount of the base stations (knots In) for maintenance of territory Mariupol will make 166
Planning of a transport network (transmissions) is planning of communication, providing co-operation between knots In (by the base stations), RNC (by base comptrollers) and Msc network (by the center of commutations).
At planning of a transport network a main task there is creation of project of optimum topology of network and type selection flow lines, in-use in a network. Either setting of own radioreleynykh flow lines, either gasket flow lines or lease of already existent flow lines, inscribed on a location and terms of steady radio contact in the developed cellular network is thus possible.
Every base station must be connected with a base comptroller. This connection can be organized both straight and through other base stations, as an equipment of knots In has flexible possibilities of construction of network of passing to different configuration.
In the known going near planning of a transport network during optimization of topology of network of transmission one by one the algorithms of search of the shortest tree or determination of maximal stream are utilized some index (for example, on length or cost), such as algorithms Prima, Kraskala, Fogelya and other. At an account two or certain difficulties more than indexes of quality appear, because many indexes depend not only on each other but also from the topology of network got in the total, for example a carrying capacity depends on that straight knot In united with RNC or through other base stations.
Therefore the important task of this stage of planning is a lead through of multicriterion optimization of topology network structure on the aggregate of indexes of quality. To decide this task of planning in practice, needed the detailed information about a cellular network, got on the previous stages of planning structure, formulation of tasks of network and requirements to its quality of service.
For the beginning of optimization it is necessary to have the followings basic data:
- plan (card) of location of the base stations, base comptrollers and center of commutation;
- lengths of possible flights (distance between the knots of network - by knots In and RNC), their cost descriptions, necessary carrying capacity and other information.
Choice of indexes of quality of transport networks. At planning of transport networks it is possible to utilize indexes qualities, taking into account: general spread of network; an amount of links is in a chain; cost descriptions: cost of build works, cost of lease of existent lines, cost of equipment and dr.; in-use and reserve carrying capacity; reliability of flight; speed of transmission; bar of frequencies; probability of erroneous reception is beaten (BER) other In this work such are chosen index of quality of every flight, as length and cost of flight.
Thus, every flight and transport network on the whole is characterized the index of quality. It is further suggested to enter the generalized index of quality of every flight as the self-weighted sum of the chosen indexes of quality. In supposition, that every flight is characterized now the scalar index of quality, by an algorithm Prima is the shortest tree for a transport network.

Conclusions

In master's degree work general description is resulted Mariupol, territorial location, population, administrative and economic description. The market of potential users of cellular communication of the third generation network is certain Mariupol. The general portrait of subscribers, making the market of users of UMTS on territory Mariupol, is resulted. A relation is certain Favour is Subscriber.
Basic technical descriptions of cellular communication of UMTS network are considered. The flow diagram of cellular communication for terms network is developed Mariupol, the functions of its basic components are certain.
The preliminary calculation of area of radio coverage is conducted are territories Mariupol on a model peasant's Hut. A design as a result of which dependences of coefficient of losses are got at distribution of signal in the network of UMTS.

List of literature

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