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It is necessary to consider that the RES power parameters of cellular communication networks have to get out of a condition of ensuring the demanded radius of a cover zone of the base station (BS) of each network. Radiuses of cover zones of BS have to be considered at calculation of size of a territorial rating between RES.

Norma ChTR are defined for the RES concrete types with their power, frequency and spatial characteristics. In case of satisfaction between RES it is considered to requirements of norms of ChTR, EMS provided.

where Rmin - sensitivity of the radio receiver; AVH - the protective relation on a radio receiver entrance; kS, kI - the coefficients considering admissible percent of time of deterioration of a radio communication is lower than the set level.

Here so commercial interests of monopolies, and a paranoidalnost of the state disturb development of technology. Many remember how until recently each photocopier was under vigilant supervision of intelligence services, and it was favorable and convenient to fly by planes of Aeroflot. And so - apparently - changed nothing.

At each turning on of phone after a choice of a network registration procedure begins. Let's consider the most general case - registration not in house, and in others, so-called guest, networks (we will assume that roaming service is allowed the subscriber.

Private decisions for norms of a frequency and territorial rating of RES can be received from the general on the basis of calculation of the values Z corresponding to concrete values of the parameters (power, frequency and spatial) entering expression (

At design of networks of overland mobile communication which contain a large number of RES concentrated on the limited territory, ChTR is inexpedient to use norms since it is necessary to consider that an inadvertent system radio noise will represent the sum

Generally, carrying out handover'a - a problem of MSC. But in the two first cases called by internal handover'ami to lower load of the switchboard and office communication lines, process of change of channels copes BSC, and MSC is only informed on an event.

Principle such. The data flow registers in a matrix in the lines. As soon as the matrix is filled, we start with it transferring information on columns. Therefore, when some bits of information are on air distorted in a row, at reception a pack of mistakes, having passed through the return matrix, will be transformed to single mistakes.

The statement of Mr. Reyman that frequency range the used CDMA is subject to withdrawal under needs of digital television - simply noodles on ears for the population. The centralized digital television still is not present. And will hardly appear, especially in this range because satellite systems proved advantages of plateaus before television towers for a long time. And even if mad figures after all will be going to do this digital television - that prevents to take away under it other range?

Development of digital networks of personal communication in the USA will be carried out against active positions of networks of cellular communication of the AMPS/D-AMPS standards which subscribers, now, are about 10% of the population of the country.

To each logical channel the code of Walsh is appointed. In only one physical channel of logical channels can be 64 since sequences of Walsh by whom in compliance logical channels, only 64 are put, each of which has length on 64 bits. From all 64 channels the first code of Walsh is appointed to the 1st canal (W to which there corresponds "The pilot channel", is appointed to the following canal the thirty second code of Walsh (the codes of Walsh are appointed W3 following 7 channels also (W1,W2,W3,W4,W5,W6,W to which there correspond channels of a call, and the remained 55 channels are intended for data transmission on "The channel of a direct traffic".

The large number of subscribers can interact with the same base station of a cellular network. Such operating mode is called as multiple access (multiple access) to a base station. For ensuring multiple access the general resource of a base station is subdivided into a certain number of "channels" to which users get access. At the same time the subscriber can use only one channel. Occupation of the canal comes at connection to this base station (upon transition to it from an area of coverage of other base station or initialization a call, release of the channel - upon transition to an area of coverage of other base station or the end of negotiations.