22 cdma signal tracing-8.ppt
DESCRIPTION
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CDMA Signal Tracing
ZTE University
CDMA-BSS Team
Main Content
CDMA Call Processing
Originated Call Signal Tracing
Terminated Call Signal Tracing
CDMA MS Call Processing
Power-UpPower-Up
InitializationInitialization
IdleIdle
SystemAccess
SystemAccess
TrafficTraffic
Mobile station has fully acquired
system timing
Mobile station receives a Paging Channel message requiring ACK or response, originates a call, or
performs registration
Mobile station is directed to a Traffic Channel
Mobile station ends use of the Traffic Channel
Mobile station receives an ACK to an Access Channel transmission
other than an Origination Message or a Page Response Message
Mobile station is in idle handoff with NGHBR_CONFG equal to
‘011’ or is unable to receive Paging Channel Message
Originated Call
• Allocates resources
• Allocates resources
Mobile Station Base Station
• Detects user-initiated call
• Sends Origination Message
• Detects user-initiated call
• Sends Origination Message ACCESS
• (FW null traffic is arriving but the mobile station does not know on what channel; therefore, the mobile station cannot start decoding it)
• (FW null traffic is arriving but the mobile station does not know on what channel; therefore, the mobile station cannot start decoding it)
• Sends message with this information to the switch
• Sends Base Station Acknowledge- ment Order
• Sends message with this information to the switch
• Sends Base Station Acknowledge- ment Order
FW TRAFFIC
• Allocates resources for Service Option 1
• Allocates resources for Service Option 1
• Begins transmitting null Reverse Traffic Channel Data
• Sends Service Request Message for Service Option 1
• Begins transmitting null Reverse Traffic Channel Data
• Sends Service Request Message for Service Option 1 RV TRAFFIC
• Acquires the Reverse Traffic Channel
• Sends Base Station Acknowledge- ment Order
• Acquires the Reverse Traffic Channel
• Sends Base Station Acknowledge- ment Order
FW TRAFFIC
• Sets up Forward Traffic Channel
Demodulation
• Receives N5m=2 consecutive valid frames
• Begins sending the Reverse Traffic Channel Preamble
• Sets up Forward Traffic Channel
Demodulation
• Receives N5m=2 consecutive valid frames
• Begins sending the Reverse Traffic Channel Preamble
• Sends Channel Assignment Message
• Sends Channel Assignment Message
PAGING
RV TRAFFIC
• Sets up Traffic Channel
• Begins sending null traffic
• Sets up Traffic Channel
• Begins sending null traffic
• Stops probing• Stops probingPAGING
CM Service
Request
Assignment
Request
MSC
Originated Call
(User Conversation)(User Conversation)
Optional
• Applies ring back from audio path or
voice record information
Optional
• Applies ring back from audio path or
voice record information
Optional
• Removes ring back from audio path
Optional
• Removes ring back from audio path
• Begins processing traffic in accordance with Service Option 1
• Sends Service Connect Completion Message
• Begins processing traffic in accordance with Service Option 1
• Sends Service Connect Completion Message
RV TRAFFIC
Optional
• Sends ring back tone or voice
record information
Optional
• Sends tones off
•indicating that the mobile station is ready
Optional
• Sends ring back tone or voice
record information
Optional
• Sends tones off
•indicating that the mobile station is ready
FW TRAFFIC
FW TRAFFIC
• Completes
the call setup
• Completes
the call setup
• Allocates resources for Service Option 1
• Sends Service Connect Message
• Allocates resources for Service Option 1
• Sends Service Connect Message
Mobile Station Base Station
FW TRAFFIC
MSC
Assignment
Completion
• Stops probing
• (FW null traffic is arriving but the mobile station does not know on what channel; therefore, the mobile station cannot start decoding it) • Sets up Traffic Channel
• Begins sending null Traffic Channel data
• Acquires the Reverse Traffic Channel
• Sends Base Station Acknowledge- ment Order
• Sets up Forward Traffic Channel
Demodulation
• Receives N5m=2 consecutive valid frames
• Begins sending the Reverse Traffic Channel Preamble
• Begins transmitting null Traffic Channel data
• Sends General Page Message
• Sends Page Response Message
• Receives page message from the MSC or PSTN
• Uses HLR/VLR to get location and status of the target mobile station
• Sends Page request to the appropriate Base Station(s)
ACCESS
PAGING
RV TRAFFIC
FW TRAFFIC
PAGING
FW TRAFFIC
RV TRAFFIC
Mobile Station Base Station
• Sends Channel Assignment Message
• Sends Base Station Acknowledge- ment Order
• Sends message to switch indicating that the mobile station has responded
• Allocates resources
PAGING
Terminated CallMSC
Page Request
Page Response
Assignment Request
Terminated Call
• Sends Alert With Information Message (ring)
• Sends Alert With Information Message (ring)
• Begins processing traffic in accordance with Service Option 1
• Sends Service Connect Completion Message
• Begins processing traffic in accordance with Service Option 1
• Sends Service Connect Completion Message
• Starts ringing
• User answers call
• Stops ringing
•Sends Connect Order
• Starts ringing
• User answers call
• Stops ringing
•Sends Connect Order
(User Conversation) (User Conversation)
FW TRAFFIC
RV TRAFFIC
RV TRAFFIC
• Sends Service Connect Message• Sends Service Connect MessageFW TRAFFIC
• Sends message to the switch indicating that the mobile station is ready
• Sends message to the switch indicating that the mobile station is ready • Call proceeds• Call proceeds
• Allocates resources for Service Option 1
• Sends Service Response Message accepting Service Option 1
• Allocates resources for Service Option 1
• Sends Service Response Message accepting Service Option 1
RV TRAFFIC
• Sends Service Request Msg for Service Option 1
• Sends Service Request Msg for Service Option 1
FW TRAFFIC
• Begins transmitting null Traffic Channel data
• Begins transmitting null Traffic Channel data RV TRAFFIC
Mobile Station Base Station
Assignment
Completion
MSC
