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LEON-G100/G200 - System Integration Manual

GSM.G1-HW-09002-C Preliminary System description

Page 8 of 75

1 System description

1.1 Overview

LEON-G100/G200 GSM/GPRS modules integrate a full-featured Release 99 GSM-GPRS protocol stack, with the

following main characteristics.

Quad band support: GSM 850 MHz, EGSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz

Power class 4 (33 dBm nominal maximum output power) for GSM/EGSM bands

Power class 1 (30 dBm nominal maximum output power) for DCS/PCS bands

GPRS multislot class 10

All GPRS coding schemes from CS1 to CS4 are supported

GPRS bit rate: 85.6 kbps (max.), 53.6 kbps (typ.) in down-link; 42.8 kbps (max.), 26.8 kbps (typ.) in up-link

CS (Circuit Switched) Data calls are supported in transparent/non transparent mode up to 9.6 kbps

Encryption algorithms A5/1 for GSM and GPRS support

Bearer service fax Group 3 Class 2.0 support

LEON-G100/G200 modules are Class B Mobile Stations (i.e. the data module can be attached to both GPRS and

GSM services, using one service at a time). Network operation modes I to III are supported.

Paging messages for GSM calls can optionally be monitored during GPRS data transfer in not-coordinating

network operation mode NOM II-III.

PBCCH/PCCCH logical channels supported, CBCH reception when PBCCH supported.

LEON-G100/G200 modules implement GPRS multi-slot class 10 for data transfer. GPRS class determines the

maximum number of timeslots available for upload and download and thus the speed at which data can be

transmitted and received: higher classes typically allow faster data transfer rates. GPRS multi-slot class 10 uses a

maximum of 4 slots in download (reception) and 2 slots in upload (transmission) with 5 slots in total.

The network automatically configures the number of timeslots used for reception or transmission (voice calls

take precedence over GPRS traffic). The network also automatically configures channel encoding (CS1 to CS4).

The maximum GPRS bit rate of the mobile station depends on the coding scheme and number of time slots.

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