Gsm ppt pdf

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Gsm — global system for mobile communication. Cellular network. Cellular network presentation. GSM Architecture. Gsm architecture. Full gsm overview modified.

Related Books Free with a 30 day trial from Scribd. Uncommon Carriers John McPhee. MS Equipment used by mobile service subscribers for access to services. Base Station Controller. Wireless transmission Wireless diversity Wireless channel encryption Conversion between wired and wireless signals Frequency Hopping. In general, cell with multi-sector is in common use. Every directional cell adopts directional antenna. Traffic Measurements.

For example, the traffic of a channel occupied for 30 minutes in an hour is 0. Frequency Hopping. Types: Base band frequency hopping keeps the transmission and receiving frequency of each carrier unit unchanged, but merely sends FU transmission data to different carrier units at different FN moments. Diversity ion Technology. The multi-path propagation of radio signals causes magnitude fading and delay time. Frequency Reuse Pattern. Every site owns 3 frequency. BTS TX TRM. TX TX1.

TX 3 TX3. TX 4 TX4. ANT RX2. RX3 Cable RX4. Since very 4 16k timeslot can be multiplexed to a 64k timeslot, each E1 consists of 32 64k timeslot. So network mode of OMC-R includes two: local networking and centralized networking. They will be introduced in detail later. Open navigation menu. Close suggestions Search Search. User Settings.