Traffic Data Rate
Last updated: October 28, 2004
The traffic data rate determines the rate used on the fundamental channel (FCH ) (for IS-2000 system) and traffic channel (IS-95 system) when a call is established in a loopback (with service options SO2, SO9, or SO55) (see
Service Option
). It can be changed at any time.
To configure the data rate for supplemental channel (SCH), see
Configuring the TDSO Supplemental Channel Information
.
Traffic Data Rate in Loopback Service Options
|
Traffic Data Rate
|
IS-95 System
|
IS-2000 System
|
|
SO2
|
SO9 |
(Fwd1, Rvs1) |
(Fwd2, Rvs2) |
(Fwd3, Rvs3) |
(Fwd4, Rvs3) |
(Fwd5, Rvs4) |
|
Full |
9.6 kbps |
14.4 kbps |
9.6 kbps |
14.4 kbps |
9.6 kbps |
14.4 kbps |
|
Half |
4.8 kbps |
7.2 kbps |
4.8 kbps |
7.2 kbps |
4.8 kbps |
7.2 kbps |
|
Quarter |
2.4 kbps |
3.6 kbps |
2.4 kbps |
3.6 kbps |
2.7 kbps |
3.6 kbps |
|
Eighth |
1.2 kbps |
1.8 kbps |
1.2 kbps |
1.8 kbps |
1.5 kbps |
1.8 kbps |
|
Random (40% Voice Activity) |
Random (40% Voice Activity) is used to simulate a typical usage of mobile station with 40% voice activity, which 40% of the transmitted frames carry voice data at greater than eighth data rate. To simulate 40% voice activity, the data is sent at random rate but the distribution is controlled such that 28% of the time is at full rate, 6% of the time is at half rate, 6% of the time is at quarter rate, and remaining 60% of the time is at eighth rate. The Random (40% Voice Activity) data rate setting is useful for MS's talk time test in R-FCH gating mode (see
R-FCH Gating
).
When Random (40% Voice Activity) traffic data rate is selected, the test set will use fixed ranging, and range the receiver to Quarter rate expected power (see
Reverse Traffic Channel Data Rate Determination
).
|
Setting Considerations
-
The traffic data rate setting is applied only when a call is established in loopback service options (such as SO2, SO9, or SO55). If a non-loopback service option (see
Service Option
) is selected, the data rate setting is stored until a loopback service option is active.
-
When a call is established in an SO32 or SO33, the fundamental data data is fixed to the Full rate.
-
If R-FCH gating mode is enabled (on), the R-FCH/R-PICH will only actually be gated if the data rate on the R-FCH is eighth rate. See
R-FCH Gating
.
-
The traffic data rate setting impacts the estimation of the
Expected Power
.
|
top
of page