Post on 14-Oct-2014
Wireless Curriculum Development SectionWireless Curriculum Development SectionWireless Curriculum Development Section
ISSUEISSUE
ORA0000006 CDMA 1x Call flowORA0000006 CDMA 1x Call flowORA0000006 CDMA 1x Call flow
3.23.2
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Course ContentsCourse Contents
Chapter 1 Interfaces
Chapter 2 Registration Process
Chapter 3 Voice Call Flow
Chapter 4 Handoff
Chapter 5 Data Call Flow
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CDMA 1x BSS Network StructureCDMA 1x BSS Network Structure
PSTNMSC
PDSN
Abis A10/A11
A1/A2
A3/A7
BSC
PCF
A8/A9Um
CDMA2000 1X BSS
MS
MS
BTS
BTS
BTS
BTS
BTS
BTS
BSC
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Course ContentsCourse Contents
Chapter 1 Interfaces
Chapter 2 Registration Process
Chapter 3 Voice Call Flow
Chapter 4 Handoff
Chapter 5 Data Call Flow
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Registration ProcessRegistration ProcessMS BTS BSC MSC
REG (R-Signaling Link)
Base Ack (F-Signaling Link)
Accept (F-Signaling Link)
MS Ack (R-Signaling Link)
Location Update Request
Location Update Accept
Registration MsgACH
Base Ack OrderPCH
Registration Accepted OrderPCH
MS Ack OrderACH
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Course ContentsCourse Contents
Chapter 1 Interfaces
Chapter 2 Registration Process
Chapter 3 Voice Call Flow
Chapter 4 Handoff
Chapter 5 Data Call Flow
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Mobile Originated CallMobile Originated CallMS BTS BSC MSC
ORM (R-Signaling Link)Base Ack (F-Signaling Link)
Abis-BTS Setup (F-Signaling Link)
Abis-Connect (R-Signaling Link)
Abis-Connect Ack (F-Signaling Link)
Abis-BTS Setup Ack (F-Signaling Link)
Null data (F-Traffic Link)
ECAM (F-Signaling Link)
Preamble (R-Traffic Link)
Base Ack (F-Traffic Link)
Idle Data (R-Traffic Link)
MS Ack (R-Traffic Link)
Ser Connect (F-Traffic Link)
Ser Conn Comp (R-Traffic Link)
CM Service Request
Assignment Complete
Assignment Request
Origination MsgACH
Base Ack OrderPCH
Null Traffic DataTCH
ECAMPCH
Traffic Channel PreambleTCH
Base Ack OrderTCH
Idle TCH DataTCH
MS Ack OrderTCH
Service Connect MsgTCH
Service Connect CompleteTCH
Null data (R-Traffic Link)
Ring Back ToneTCH
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Mobile Terminated CallMobile Terminated Call
PRM (R-Signaling Link)
GPM (F-Signaling Link)
Paging Response ACH
GPMPCH
Paging Response
Paging Request
Assignment Complete
Assignment Request
TCH Establish Process
Base Ack (F-Signaling Link)Base Ack Order
PCH
MS BTS BSC MSC
Abis-BTS Setup (F-Signaling Link)
Connect
Ser Conn Comp (R-Traffic Link)Service Connect Complete
TCH
Alert (F-Traffic Link)Alert With Information
TCHMS Ack Order
TCHConnect
TCH Connect (R-Traffic Link)
Base Ack OrderTCH
MS Ack (R-Traffic Link)
Base Ack (F-Traffic Link)
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Call Release (MS Initiated)Call Release (MS Initiated)
MS BTS BSC MSC
Release Order (R-Traffic Link)
Release Order (F-Traffic Link)
Abis-BTS Release (F-Signaling Link)
Abis-Remove (R-Signaling Link)
Abis-Remove Ack (F-Signaling Link)
Abis-BTS Release Ack (F-Signaling Link)
Clear Request
Clear Command
Release OrderTCH
Release OrderTCH
Clear Complete
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Call Release (MSC Initiated)Call Release (MSC Initiated)
MS BTS BSC MSC
Release Order (R-Traffic Link)
Release Order (F-Traffic Link)
Abis-BTS Release (F-Signaling Link)
Abis-Remove (R-Signaling Link)
Abis-Remove Ack (F-Signaling Link)
Abis-BTS Release Ack (F-Signaling Link)
Clear Command
Release OrderTCH
Release OrderTCH
Clear Complete
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Course ContentsCourse Contents
Chapter 1 Interfaces
Chapter 2 Registration Process
Chapter 3 Voice Call Flow
Chapter 4 Handoff
Chapter 5 Data Call Flow
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Handoff TypesHandoff Types
Hard handoffMS terminates its communication with the original BTS before setting up communication
with the new BTS. In such handoff, break-before-make technique is used.
Soft handoffDuring handoff MS establish connections with both original and target BTSs. In this way
MS maintains communication with two or three sectors of different cells simultaneously.
Softer handoffIt is also similar to the Soft handoff, the only difference is it takes place between
different sectors of the same BTS within the same frequency. In addition, the softer
handoff adopts coherent combination for signals of different branches to achieve higher
signal gain than the selective combination used in ordinary soft handoff.
NOTE: Softer handoff is not possible between two different
frequency carriers
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Hard Handoff Process (Intra BSC)Hard Handoff Process (Intra BSC)
MS MSCBSS_DBSS_SPSMM
Handoff Perform
Base Ack Order
Null Forward Traffic Frame
Handoff Direction Message
MS Ack Order
Reverse Traffic Channel Preamble
Base Ack Order
Reverse Traffic Channel Frames
Handoff Completion Message
Base Ack Order
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Hard Handoff Process (Inter BSC)Hard Handoff Process (Inter BSC)BSS_DMS MSCBSS_S
PSMM
Base Ack OrderHandoff Required
Handoff Request
Null Forward Traffic Channel Frames
Handoff Request AckHandoff Command
Handoff Direction Message
MS Ack OrderHandoff Commenced
Reverse Traffic Channel Preamble
Base Ack Order
Reverse Traffic Channel Frames
Handoff Completion Message
Base Ack Order
Handoff completeClear Command
Clear Complete
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Soft Handoff Process (Add Path)Soft Handoff Process (Add Path)
MS BSCBTS_DBTS_SPSMM
Base Ack Order
Pilot Strength Measurement Report Message (R-traffic Link)
Base Ack Order (F-traffic Link)
Abis-BTS Setup (F-Signaling Link)
Abis-Connect (R-Signaling Link)
Abis-Connect Ack (F-Signaling Link)
Abis-BTS Setup Ack (R-Signaling Link)
Forward Frame (F-traffic Link)
Extended Handoff Direction Message
Forward Traffic FrameEHDM (F-traffic Link)
MS Ack OrderMS Ack Order (R-traffic Link)
Handoff Completion MessageHCM (R-traffic Link)
Base Ack OrderBase Ack Order (F-traffic Link)
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Softer Handoff Process (Add Path)Softer Handoff Process (Add Path)
During this process, no resource is allocated at
the Abis interface.
MS BSCBTSPSMM
Base Ack Order
Pilot Strength Measurement Report Message (R-traffic Link)
Base Ack Order (F-traffic Link)
Abis-BTS Setup (F-Signaling Link)
Abis-Connect (R-Signaling Link)
Abis-Connect Ack (F-Signaling Link)
Abis-BTS Setup Ack (R-Signaling Link)
Extended Handoff Direction Message
Forward Traffic FrameEHDM (F-traffic Link)
MS Ack OrderMS Ack Order (R-traffic Link)
Handoff Completion MessageHCM (R-traffic Link)
Base Ack OrderBase Ack Order (F-traffic Link)
:Source Sector :Destination Sector
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Soft Handoff Process (Drop Path)Soft Handoff Process (Drop Path)
MS BSCBTS_MBTS_DPSMM
Base Ack Order
PSMM (R-traffic Link)
Base Ack Order (F-traffic Link)
Abis-BTS Release (F-Signaling Link)
Abis-Remove (R-Signaling Link)
Abis-Remove Ack (F-Signaling Link)
Abis-BTS Release Ack (R-Signaling Link)
Extended Handoff Direction MessageEHDM (F-traffic Link)
MS Ack OrderMS Ack Order (R-traffic Link)
Handoff Completion MessageHCM (R-traffic Link)
Base Ack OrderBase Ack Order (F-traffic Link)
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Softer Handoff Process (Drop Path)Softer Handoff Process (Drop Path)
:Maintained Sector :Dropped Sector
MS BSCBTS
EHDM (F-traffic Link)Base Ack Order
PSMMPilot Strength Measurement Report Message (R-traffic Link)
Base Ack Order (F-traffic Link)
HCM (R-traffic Link)
Base Ack Order (F-traffic Link)
MS Ack Order
Handoff Completion Message
Base Ack Order
During this process, no resource is released at
the Abis interface.
Abis-BTS Release (F-Signaling Link)
Abis-Remove (R-Signaling Link)
Abis-Remove Ack (F-Signaling Link)
Abis-BTS Release Ack (R-Signaling Link)
Extended Handoff Direction Message
MS Ack Order (R-traffic Link)
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Course ContentsCourse Contents
Chapter 1 Interfaces
Chapter 2 Registration Process
Chapter 3 Voice Call Flow
Chapter 4 Handoff
Chapter 5 Data Call Flow
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Mobile Packet Data Service StatesMobile Packet Data Service States
Release traffic channels on Um ,Abis ,A8
Setup traffic channel on Um ,Abis ,A8Active Dormant
Null
Setup traffic channel on Um ,Abis
,A8,A10
Release traffic channels on all interface
Rele
ase
traffi
c ch
anne
l on
A10
Null State :There are not any connections between the MS and Network.Active State :In this state, Traffic channel exists between MS and PDSN, and both sides may transmit data. Dormant State :No traffic channel exists between MS and PCF. But PPP connection and traffic channel on A10 are maintained.
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Null to ActiveNull to Active
BTS & BSCMS MSC PCF PDSN
TCH Setup Process
Establishing PPP connection
Origination Message
Base Ack Order
CM Service Request
Assignment Request
A9-Setup-A8
A9-Connect-A8
A11-Registration-Request
A11-Registration-Reply
Assignment Complete
To be continued
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PPP Establishment Process (Simple IP)PPP Establishment Process (Simple IP)
MS Home AAALocal AAA PDSN
TCH ,A8 & A10 ConnectionEstablishment Process
Transmitting Traffic Data
LCP-Configure-Request
LCP-Configure-Response
CHAP-Authenticate-Challenge
CHAP-Authenticate-Response
CHAP-Authenticate-Result
IPCP-Configure-Request
IPCP-Configure-Response
Access-Request
Access-Response
Access-Request
Access-Request
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R-SCH Maintenance ProcessR-SCH Maintenance Process
MS BTS BSC
SCRM (R-Traffic Link)
Base Ack Order
Supplemental Channel Request Message
Base Ack Order (F-Traffic Link)
Abis BTS Setup (F-Signaling Link)
Abis Connect (R-Signaling Link)
Abis Connect Ack (F-Signaling Link)
Abis Burst Request (F-Signaling Link)
Abis Burst Response (R-Signaling Link)
Abis BTS Setup Ack (R-Signaling Link)
Abis Burst Commit (F-Signaling Link)
ESCAM (F-Traffic Link)Extended Supplemental Channel Assignment Message
High Speed Data on SCH
Abis Burst Release (F-Signaling Link)
Abis Terrestrial circuit for SCH establish process (optional)
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F-SCH Maintenance ProcessF-SCH Maintenance ProcessMS BTS BSC
Abis BTS Setup (F-Signaling Link)
Abis Connect (R-Signaling Link)
Abis Connect Ack (F-Signaling Link)
Abis BTS Setup Ack (R-Signaling Link)
High Speed Data on SCH
Abis Burst Release (F-Signaling Link)
Abis Burst Request (F-Signaling Link)
Abis Burst Response (R-Signaling Link)
Abis Burst Commit (F-Signaling Link)
ESCAM (F-Traffic Link)Extended Supplemental Channel Assignment Message
Abis Burst Request (F-Signaling Link)
Abis Burst Response (R-Signaling Link)
Abis Burst Commit (F-Signaling Link)
ESCAM (F-Traffic Link)Extended Supplemental Channel Assignment Message
Abis Terrestrial circuit for SCH establish process (optional)
F-SCH duration extending process
(optional)
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Dormant to Active (MS initiates)Dormant to Active (MS initiates)
BTS & BSCMS MSC PCF PDSN
Active Packet Data Session & Traffic Data transmitting
TCH Setup Process
Origination Message
Base Ack Order
CM Service Request
Assignment Request
A9-Setup-A8
A9-Connect-A8
Assignment Complete
In dormant state ,traffic channel on A10 & PPP
connection are maintained.
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Dormant to Active (PDSN initiates)Dormant to Active (PDSN initiates)BTS & BSCMS MSC PCF PDSN
TCH Setup Process
Active Packet Data Session & Traffic Data transmitting
GPM
Paging Response MessagePaging Response
Assignment Request
A9-Setup-A8
A9-Connect-A8
Assignment Complete
In dormant state ,traffic channel on A10 & PPP
connection are maintained.
Traffic Data Packet A9-BS Service Request
BS Service Request
BS Service Response
A9-BS Service Response
Paging Request
Base Ack Order
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Active to Dormant (MS initiates)Active to Dormant (MS initiates)
BTS & BSCMS MSC PCF PDSN
Release Order
Release Order
Clear Request
Clear Command
A9-Release-A8
A9-Release-A8 Complete
Clear Complete In dormant state ,traffic channel on A10 & PPP
connection are maintained.
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Active to Dormant (BSC initiates)Active to Dormant (BSC initiates)
In dormant state ,traffic channel on A10 & PPP
connection are maintained.
BTS & BSCMS MSC PCF PDSN
Clear Request
Release Order
Release Order
Clear Command
A9-Release-A8
A9-Release-A8 Complete
Clear Complete
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Active to Null (MS initiates)Active to Null (MS initiates)
BTS & BSCMS MSC PCF PDSN
Release Order
Clear Request
Release Order
Clear Command
A9-Release-A8
A9-Release-A8 Complete
Clear Complete
A11-Registration-Request
A11-Registration-Reply
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Active to Null (PDSN initiates)Active to Null (PDSN initiates)
BTS & BSCMS MSC PCF PDSN
A11-Registration-Update
A11-Registration-Ack
A11-Registration-Request
A11-Registration-Reply A9-Disconnect-A8
A9-Release-A8
Clear Request
Release Order
Release OrderClear Command
Clear Complete
A9-Release-A8 Complete
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Active to Null (MSC initiates)Active to Null (MSC initiates)
BTS & BSCMS MSC PCF PDSN
Release Order
Release Order
Clear Command
A9-Release-A8
A9-Release-A8 Complete
Clear Complete
A11-Registration-Request
A11-Registration-Reply
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Dormant to Null Direct (MS power off)Dormant to Null Direct (MS power off)BTS & BSC MSC PCF PDSNMS
Registration Message
Location Updating Request
Location Updating Accept
A9-Update-A8
A11-Registration-Request
A11-Registration-Reply
A9-Update-A8 Ack
Registration Accepted Order
MS Ack Order
Base Ack Order
In dormant state ,traffic channel on A10 & PPP
connection are maintained.
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