MiP Generic Slides
Slide titleIn CAPITALS
50 pt
Slide subtitle 32 pt
MiP Generic Slides
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
2
MSC Pool Traffic Distribution
– BSC/RNC distributes subscribers roaming into the pool area among the MSCs.– Subscribers remain registered in the same MSC until they roam out of the pool
area.
Service Area 1
MSC
BSC/RNC
Service Area 2
MSCService Area 3
MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
Pool Service Area
MSC
BSC/RNC
MSC MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
Traffic distribution based on relative
MSC capacity
Reduced load, as less Handover and Location Update
traffic.MSC MSC MSC
No impacts on terminals.
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
3
Relative Capacity Factor (1-255), defined in BSC
Resulting Trafficin %
MSC1 4 50%
MSC2 2 25%
MSC3 2 25%
Relative Capacity Factor (1-255), defined in BSC
Resulting Trafficin %
NRI (0-1023), defined in MSC
and BSC
MSC1 4 50% 1, 2, 3, 4
MSC2 2 25% 5, 6
MSC3 2 25% 7, 8
MSC1
BSC/RNC
MSC2 MSC3
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
Pool Service Area
MSC Pool Traffic Distribution, Example of Location Updating with IMSI
– BSC distributes subscribers roaming into the pool area among the MSCs.– Subscribers remain registered in the same MSC until they roam out of the pool
area.
BSC selects one MSC, according to the relative MSC capacity factors.BSC selects MSC1.
Location Update(IMSI)
Subscriber roams into the pool.
MSC assigns a TMSI, including a NRI. The
NRI identifies the MSC.
Temporary Mobile Subscriber Identity (TMSI)
TMSIGeneration
Network ResourceIdentifier (NRI)
TMSIIdentification
TMSI Assignment(TMSI incl. NRI=1)
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
4
MSC1
BSC/RNC
MSC2 MSC3
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
Pool Service Area
MSC Pool Traffic Distribution, Example of Call Setup
– BSC routes the traffic towards the MSC identified by the NRI
BSC routes the trafficto the MSC identified
by the NRI. “Call Setup” (TMSI incl.
NRI=1)Subscriber,registered in the pool,
initiates now a call.
MSC verifies NRI and handles call as normal.
Temporary Mobile Subscriber Identity (TMSI)
TMSIGeneration
Network ResourceIdentifier (NRI)
TMSIIdentification
“Call Continue”
Relative Capacity Factor (1-255), defined in BSC
Resulting Trafficin %
NRI (0-1023), defined in MSC
and BSC
MSC1 4 50% 1, 2, 3, 4
MSC2 2 25% 5, 6
MSC3 2 25% 7, 8
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
5
MSC Pool Load Distribution
Service Area 1
MSC
BSC/RNC
Service Area 2
MSCService Area 3
MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
Pool Service Area
MSC
BSC/RNC
MSC MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
– The load is distributed over the MSCs in the pool. No load peaks in individual MSCs. – Pooling gives more capacity, as the existing capacity is utilized more efficiently.
MSC MSC MSC
MSC MSC MSCMSCMSC
MSCMSC MSCMSC MSCMSC
High Risk for Congestion
No Risk for Congestion
Simplified dimensioning and planning.
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
6
MSC Pool Scaleable Capacity
Pool Service Area
MSC
BSC/RNC
MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
– Number of pool members can be increased over time to match the traffic growth no complex BSC/RNC re-homing
Service Area 1
MSC
BSC/RNC
Service Area 2
MSC
BSC BSCBSC/RNC BSC
MSCMSC MSCMSC
MSCMSC MSCMSC
MSCMSCMSCMSC
MSCMSC MSCMSC
MSCService Area 2a Service Area 2b
MSC
BSC/RNC
BSC/RNC
BSC/RNC
MSCMSCMSCMSCMSC MSCMSC
MSCMSCMSC MSCMSCMSCMSC
Capacity expansion by
service area split (re-configuration of radio network).
Simple capacity expansion by
adding one MSC. Independent RAN and CN planning.
Top right corner for field-mark, customer or partner logotypes. See Best practice for example.
Slide title 40 pt
Slide subtitle 24 pt
Text 24 pt
Bullets level 2-520 pt
7
MSC Pool Redundancy
Service Area 1
MSC
BSC
Service Area 2
MSCService Area 3
MSC
BSC BSCBSC BSC
– When one MSC becomes unavailable (planned or unplanned) , the BSC/RNC redistributes the mobiles when they access the network among the remaining MSCs.
Pool Service Area
MSC
BSC/RNC
MSC MSC
BSC/RNC
BSC/RNC
BSC/RNC
BSC/RNC
MSCMSC
MSCMSC
MSC MSC
– Redistribution time of all mobiles is the ~same as the periodic registration time.– Incoming calls can be received, when the mobile station has been redistributed.– Benefit:
Increased MSC In-Service Performance. “Zero” Down Time on MSC layer. An MSC can be taken out for service in controlled and graceful way for
planned maintenance or upgrade when using load re-distribution.
“Zero” Down Time.
Increased ISP.