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User Manual
Airbridge cBTS3612 CDMA Base Station
MS
(1) Origination
(2) BS ACK
(5)
ECAM
(6) Tch Preamble
(7) BS Ack Order
(8) MS Ack Order
(9) Service Connect Msg
(10) Service Connect Cmp Msg
Figure 4-6 MS-originated data service procedure
1)
MS sends origination message to BS via the access channel on air interface.
2)
After BTS receives origination message, it sends BS acknowledgement to MS.
3)
BSC constructs a CM service request message and sends it to MSC.
4)
MSC sends assignment request message to BSC, to request BTS to assign
radio resources.
5)
BTS sends channel assignment message in the paging channel of air interface.
6)
MS begins to send preamble in the assigned reverse traffic channel.
7)
After acquiring the reverse traffic channel, BTS sends "BS ACK Order" to MS in
the forward traffic channel.
8)
After receiving "BS ACK Order", MS sends "MS ACK Order", and transmits the
null service frame in the reverse traffic channel.
9)
BTS sends service connection message/service selection response message to
MS, and designates the service configuration used for the call. MS starts to
handle the service according to the designated service configuration.
BSS
MSC
(3) CM Service Request
(4) Assignment Request
(14) A 9-Connect -A8
(15) Assignment Complete
Establishing PPP connection
Transmitting packet data
4-7
PCF
(11) A 9-Setup -A8
A11 Registration
(12)
Request(Life time)
(13)
Reply (Life time, Accept)
, Mobile IP Registration
System Description
4 System Function
PDSN
A11-Registration
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