In uplink direction, 3 timeslots can carry a bandwidth of 3*59.2 kbit/s = 177.6 kbit/s. when the best EDGE modulation and coding scheme can be used, 5 timeslots can carry a bandwidth of 5*59.2 kbit/s = 296 kbit/s. Under the best reception conditions, i.e. When more data is transferred in the uplink the network can at any time change the constellation to 4+2 or 3+3. If data traffic is concentrated in downlink direction the network will configure the connection for 5+1 operation. According to 3GPP TS 45.002 (Release 6), Table B.2, mobile stations of this class support 5 timeslots in downlink and 3 timeslots in uplink with a maximum number of 6 simultaneously used timeslots. Some high end mobile, usually also supporting UMTS also support GPRS/EDGE multislot class 32. Depending on the amount of data to be transfered in the uplink the network will automatically configure the ongoing data stream for either 3+2 or 4+1 operation. Mobiles of this class can use 4 timeslots in downlink direction and 2 timeslots in uplink direction with a maximum number of 5 simultaneous timeslots. The most comment GPRS/EDGE mobile station class today seems to be multislot class 10. And fourth, the reception conditions experienced by the mobile.

Third, the network has to match the abilities of the mobile device.

Second, the capability of the mobile, or it’s multislot class.

Usually, voice calls take precedence over GPRS traffic and in case not enough time slots are available for both, some GPRS timeslots are sacrificed for voice calls. First, the capacity available in the cell. The upload and download speeds that can be reached with a GPRS and EDGE mobile phones depends on a number of factors.

Multislot class in gprs