2201R Mobile Tester User Guide
Chapter 3 Performing manual tests and measurements in GSM mode
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DRX
Discontinuous Reception (DRX) is a parameter broadcast by the network (simulated by the 2201R Mobile Tester).
DRX tells the mobile not to listen to the paging channel in every multiframe but only (for example) to every second
or third. The mobile is assigned to one of several ‘paging groups’, depending on its IMSI (International Mobile
Subscriber Identity). Paging groups allow the network to handle a higher amount of mobiles within a cell, while the
mobiles save battery power. The number of multiframes over which the paging groups are spread is broadcast with
the BS_PA_MFRMS parameter in the System Information messages. The BS_PA_MFRMS is equivalent to the DRX
parameter and allows spreading over 2 to 9 multiframes.
Note: A multiframe is a period of 51 TDMA frames and equals roughly 235 ms in time.
Entry range: 2 Multif to 9 Multif. Default value: 2 Multif.
DTX
Discontinuous Transmission (DTX) is a parameter broadcast by the network (simulated by the 2201R Mobile Tester).
While on a voice channel, it allows the mobile phone to seize transmission in certain frames if no voice is detected.
DTX is a method to save power from the battery.
Using this selection field, DTX can be switched either on or off. The default is OFF.
NCC
The Network Color Code (NCC) is transmitted by the base station on its synchronization channel SCH. The NCC
allows the mobile to identify base stations belonging to different (national) networks.
Entry range: 0 to 7. Default value: 2.
BCC
The Base station Color Code (BCC) makes it easy for the mobile to clearly separate between several neighboring base
stations. Furthermore, the BCC is identical with the training sequence code.
Entry range: 0 to 7. Default value: 0.
LAC
The Location Area Code (LAC) is the number of the base station within the network. Several base stations together
may form a cell.
Entry range: 0 to 65535. Default value: 1.
Cell Ident/Access
The first input field defines the number of the cell within the network (the cell identity).
Entry range: 0 to 255. Default value: 255.
The second input field refers to the Cell Barred Access parameter. With Access set to 0, the mobile phone is allowed
to access the simulated network. An entry of 1 blocks the network for access by the phone.
Entry range: 0 or 1. Default value: 0.
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