Also, the logical channels installed in each frame varies the purpose of the physical channel. The meaning MS → BSS all mobile recharge download logical channels in each frame are the type RACH. The meaning BSS → MS, is groups available. First group has the structure: a channel FCCH, SCH channel, four-channel and four-channel BCCH PCH/ AGCH.

In the other four groups are replaced with channel BCCH channels PCH/ AGCH. This is intended to minimize the use of channels for other functions to those in the ability of the system. In relation to involvement in implementation of various functions necessary to operate a GSM network, can be arranged in several ways, of which the most popular combinations are described below. Note that not all of combinations can be made at any time segment.

The logical channels

For small-capacity cells using a single carrier, i.e. Eight physical channels of GSM, which are installed in the following combinations of channels: Scheme of the communication chain between a mobile terminal and the fixed network, in the case of telephone communication, is shown in Figure. The sequence of processing in Figure. Highlights from the output data structure to recharge api provider obtain packets transmitted in a physical channel traffic.

Phone signal, sampled at a frequency kHz and quantified debits is applied to the input of an encoder with excited linear prediction residual pulse (LPC-RPE). The encoder output bits are obtained samples in each interval, which corresponds to a rate. Thesis output from the encoder are encoded selectively according to their importance for error protection. The final convolution encoding bit rate results which corresponds to a rate of.

Of two consecutive intervals are interwoven with a distance, to minimize fading effect leading to packet errors in the received bit stream. After interleaving, structured data packets are formed, adding to the bits of information (of them and of the following) a number of additional bits necessary for communication. The mobile recharge download binary thus arranged is applied to the GMSK modulator. The modulated signal is passed through a duplex (switch type) to ensure separation between the transmitted and the received signal.

Depending on recharge api provider

At the reception, after demodulation GMSK frequency change and obtain base band signal. In this process uses the same frequency synthesizer, for transmission and reception are never simultaneously. To optimize performance, the reception equalizer is used in order to reduce due to a communication channel with recharge api provider multiple propagation paths. The rate of.

Kb/ s, carried out after the channel encoder, resulting in, the recharge api provider net rate at the output of the voice encoder, plus. Due to the speed of parity bits and framing bits resulting from encoding. Are packaged in an of a duration. Obtained data bits (x) and given the length of which isms, resulting speed To implement various functions recharge api provider of control and supervision, each traffic channel (TCH) is associated with a low-speed control channel (SACCH) which is transmitted within of.

The SACCH channel information bits to be transmitted in them, which recharge api provider corresponds to. Channel encoder processes the information (bits) producing bits that are interwoven and IN frames transmitted DIN consecutive.