Frame structure of gsm system

2019-08-19 15:51

Jun 09, 2010  GSM System Architecture 3. GSM interface 4. GSM Network Structure MSCVLR HLR AUC EIR SCVM OMC BSC BTS PSTN ISDN PSPDN MS BSS MSSSignaling Frame Structure The Signaling Frame Structure is a multiframe of 51 frames to accommodate control channels (FCCH, SCH, BCCH, CCCH) in the downlink and random access (RACH) in the uplink. The 51multiframe lasts for 235. 38 msec. Superframes. One superframe contains 1326 TDMA frames (6. 12 seconds) can either carry 51 of 26Multiframes frame structure of gsm system

GSM data structure is split into slots, frames, multiframes, superframes and hyperframes to give the required structure and timing to the transmitted data. This includes not only the voice data, but also the important signalling information as well. The GSM frame structure provides the basis for the various physical channels used within GSM, and accordingly it is at the heart of the overall system.

Global System for Mobile (GSM) higher GSM frame structures MHz 124 channels (200 kHz) downlink MHz 124 channels (200 kHz) uplink f r e q u e n c y time GSM TDMA frame GSM timeslot (normal burst) 4. 615 ms 546. 5 s 577 s tail user data TrainingS guard space S user data tail guard The GSM frame structure is designated as hyperframe, superframe, multiframe and frame. The minimum unit being frame (or TDMA frame) is made of 8 time slots. One GSM hyperframe composed of 2048 superframes. Each GSM superframe composed of multiframes (either 26 or 51 as described below). frame structure of gsm system GSM stands for Global System for Mobile Communication uses a narrow band modification of TDMA. GSM can handle up to eight users per channel. GSM mainly operates on 1900MHz. GSM is incapable of the reliable data speeds which requires the alternate technologies. GSM is

GSM Timeslot& Frequency Specifications. A GSM Multiframe is the basic unit, and is 120 ms long. There are 26 Frames in each Multiframe, with each Frame being 4. ms long (120 ms26). Within each Frame are 8 Timeslots at 576. 92 s per Timeslot (577 s in round numbers). Finally, there are 156. 25 Bits per Timeslot, each Bit being 3. s long. frame structure of gsm system Structure of Each types of Burst. Every GSMGPRS physical channels are mapped to one of these burst types and the mapping is described below. Each of the physical channel is also mapped to higher layer channel types called Logical channels. These mappings are summarized in

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