call flow comparison gsm umts.ppt
DESCRIPTION
Call Flow Comparison GSM UMTS.TRANSCRIPT
Call Flow
A comparison between the call flow in GSM and UMTS
Handover/Clear
Call to a MS
Paging
Call from a MS
ImmediateAssignment
Assignment / Change of
Mode
Supervision
on CCCH/PCH
on CCCH/AGCH
Immediate assignment of SDCCH
on SDCCH
on TCH
Assignment of TCH
on RACH
Locating
Initiations
Filtering
Urgency
Basic Ranking
Aux RadioNetwork
Function Eval(HCS)
Organizing List
Sending List
Allocation Reply
MEASUREMENTS
•Immediate Assignment on TCH•ACLC
•ASSOC•AW•CLS•DHRA
Handover•Inter cell/BSC•Intra cell/BSC•OL/UL•Bad Quality•Urgency•HCS
Chan
nel A
dm
inis
trati
on
(SDDCH Perform.)
(Random Access)
(Assignment Fail.)
(Traffic Erlangs)
(Call Quality)
(Handover Perf.)
(Dropped Calls)
(Available TCH)
(Paging Perf.)
GSM Call Flow
Soft/SofterHandover/Clear
Call to a MS
Paging
Call from a MS
RRC Connection
RABAssignment
Supervision
on PICH/SCCPCH
on FACH/ SCCPCH Predefined Signaling
RAB Selected
on FACH/SCCPCH
on DPDCH
Assignment of DPDCH
on RACH
ActivateAlgorithms
Power Ctrl.
Code Ctrl.
Admission Ctrl.
RAB Selection
MEASUREMENTS
•Directed Retry
•Load Sharing
Soft Handover•Inter cell/BSC•Intra cell/BSC•OL/UL•Bad Quality•Urgency•HCS
Inn
er
Loop/O
ute
r Lo
op
Pow
er
Con
trol
(RRC Connect. Perform.)
(Random Access)
(RAB Establish. Fail.)
(Traffic Erlangs)
(Call Quality)
(Handover Perf.)
(Dropped Calls)
(Available TCH)
(Paging Perf.)
UMTS Call Flow
Open LoopPower Control
(Throughput)
Open Loop on Access Channel