33 CDMA Signal Tracing

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CDMA RF Optimization Unit 3




Main Content

CDMA Call Processing

Originated Call Signal Tracing

Teminated Call Signal Tracing




CDMA MS Call Processing

Power-Up

Power-Up

Initialization

Initialization

Idle

Idle

System

Access

System

Access

Traffic

Traffic

Mobile stationhas fully acquired

system timing

Mobile station receives a PagingChannel message requiring ACK or response, originates a call, or

performs registration

Mobile station is directed

to a Traffic Channel

Mobile station ends useof the Traffic Channel

Mobile station receives an ACK toan 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 receivePaging Channel Message




Originated Call

•Allocatesresources

•Allocates

resources

Mobile Station Base Station

•Detects user-initiated call

•Sends Origination Message

•Detects user-initiated call

•Sends Origination MessageACCESS

•(FW null traffic is arriving but themobile station does not know onwhat channel; therefore, the mobile

station cannot start decoding it)

•(FW null traffic is arriving but themobile station does not know onwhat channel; therefore, the mobilestation cannot start decoding it)

•Sends message with thisinformation to the switch

•Sends Base Station Acknowledge-

ment Order

•Sends message with thisinformation to the switch

•Sends Base Station Acknowledge-ment Order

FW TRAFFIC

Switch

•Sets up Traffic Channel

• Begins sending null traffic


• Begins sending null traffic

•Stops probing•Stops probing

PAGING

CM Service

Request

AssignmentRequest

MSC

•Allocates resources for ServiceOption 1


•Begins transmitting null Reverse Traffic Channel Data

•SendsService 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 TrafficChannel




FW TRAFFIC


•Receives N5m=2 consecutive validframes

•Begins sending the Reverse TrafficChannel Preamble


•Receives N5m=2 consecutive validframes

•Begins sending the Reverse Traffic

Channel Preamble

•Sends Channel AssignmentMessage

•Sends Channel AssignmentMessage

PAGING

RV TRAFFIC


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Originated Call

Optional

•Applies ring back from audio path

Optional

•Applies ring back from audio path

Optional•Removes ring back from audio path

Optional

•Removes ring back from audio path

•Begins processing primary traffic inaccordance with Service Option 1

•Sends Service ConnectCompletion Message

Optional

•Sends Origination ContinuationMessage



Optional

•Sends Origination ContinuationMessage

RV TRAFFIC

RV TRAFFIC

Optional

•Sends Alert With InformationMessage (ring back tone)

Optional

•Sends Alert With InformationMessage (tones off)

•Message sent to the switchindicating that the mobile stationis ready

Optional

•Sends Alert With InformationMessage (ring back tone)

Optional

•Sends Alert With InformationMessage (tones off)

•Message sent to the switchindicating that the mobile stationis ready

FW TRAFFIC

FW TRAFFIC

•Completesthe call

•Completesthe call


•Sends Service Connect Message


•Sends Service Connect Message


FW TRAFFIC

MSC

Assignment

Completion

(User Conversation) (User Conversation)


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Switch

•Stops probing

•(FW null traffic is arriving but themobile station does not know onwhat channel; therefore, the mobilestation cannot start decoding it)


• Begins sending null TrafficChannel data


•SendsBase Station Acknowledge-

ment Order

•Sets up Traffic Channel•Receives N5m=2 consecutive

valid frames

•Begins sending the Reverse Traffic Channel Preamble

•Begins transmitting null TrafficChannel data

•Sends General Page Message

•Sends Page Response Message

•Receives pagemessage fromthe MSC or PSTN

•Uses HLR/VLR toget location and

status of the targetmobile station

•Sends Pagerequest to theappropriate BaseStation(s)

ACCESS

PAGING

RV TRAFFIC

FW TRAFFIC

PAGING

FW TRAFFIC

RV TRAFFIC


•Sends Channel Assignment

Message


•Sends message to switchindicating that the mobile stationhas responded

•Allocatesresources

PAGING

Terminated Call

MSC

Page Response

Assignment Request

Page Request



Terminated Call

•Sends Alert With InformationMessage (ring)

•Sends Alert With InformationMessage (ring)





•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 mobilestation is ready

•Sends message to the switchindicating that the mobile

station is ready •Call proceeds•Call proceeds


•Sends Service Response Messageaccepting Service Option 1


•Sends Service Response Messageaccepting Service Option 1

RV TRAFFIC

•Sends Service Request Msgfor Service Option 1

•Sends Service Request Msgfor Service Option 1

FW TRAFFIC

•Begins transmitting null TrafficChannel data

•Begins transmitting null TrafficChannel data RV TRAFFIC


Assignment

Completion

MSC



Documents

33 CDMA Signal Tracing