User Manual
iSiteC BTS3601C CDMA Base Station
System Description
Chapter 3 System Function
3-18
R-ACH is used by MS to originate the communication with BTS, and respond to
paging channel message. MS uses random access protocol to initiate access
procedure. Regarding each of the supported paging channel, Maximum 32 access
channels can be supported.
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Reverse Traffic Channel (R-TCH)
R-TCH is used by MS to send the user information and signaling information during
the call.
In the configuration of RC1~RC2, R-TCH can be sub-divided into:
Reverse Fundamental Channel (R-FCH), and
Reverse Supplemental Code Channel (R-SCCH).
In the configuration of RC3~RC4, R-TCH can be sub-divided into:
Reverse Pilot Channel (R-PICH), which assists BTS to capture MS and improves
receiving performance,
Reverse Dedicated Control Channel (R-DCCH) used to bear traffic information and
signaling information,
Reverse Fundamental Channel (R-FCH) used to bear traffic information,
Reverse Supplemental Channel (R-SCH) used to bear the traffic information, and
Reverse Power Control sub-channel (R-PC subchannel), which is only used in RC3
and RC4 (The MS supports inner loop power control and outer loop power control on
this channel).
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Reverse Enhanced Access Channel (R-EACH)
R-EACH is used by MS to originate the communication with BTS, or respond to the
message that is specially sent to MS. R-EACH adopts random access protocol and
supports two types of access modes: Basic Access Mode and Reservation Access
Mode.
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Reverse Common Control Channel (R-CCCH)
R-CCCH is used to send the user and signaling information to BTS in case of not
using reverse traffic channel. Two access modes are supported: Reservation Access
Mode and Designated Access Mode.
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Note:
In Figure 3-9, the channels in shadow will be supported in the subsequent version.
For the location and function of the above channels in call procedure, please refer to Section ”3.1 Call
Procedure”.
