View
389
Download
0
Category
Preview:
DESCRIPTION
Uploaded from Google Docs
Citation preview
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
Assignmenton TCH
• ACLC
• ASSOC
• AW• CL
S• DH
RA
Handover• Inter
cell/BSC• Intra
cell/BSC• OL/UL• Bad
Quality• Urgency• HCS
Channel Administration
(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
Inner Loop/Outer Loop Power Control
(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
Recommended