3. NOC
Train management
AAA NAT Internet
Mobility
DHCP
Management
Mobility
Management
Local content
4. NOC
Train management
AAA NAT Internet
Mobility
DHCP
Management
Mobility
Management
Local content
5. Mobility Management Central Mobility Management Train
QoS management
Data QoS- Aggregation
Buffer Gateway
analysis scheduler unit
QoS management
Aggregation QoS- Data
Gateway Buffer
unit scheduler analysis
Tunnel management Tunnel management
Handover protocol Handover protocol
PDF
Monitoring Monitoring
6. Handover protocol
Two alternatives
Mobile IP (MIP)
Mobile Multi-Path SCTP (MMP-SCTP)
Train = a mobile router
Passengers = a mobile network
User devices don’t need to be
MMP-SCTP or MIP-aware
7. Handover protocol
MMP-SCTP vs MIP
MMP-SCTP has multihoming
MMP-SCTP has built-in reliability
MMP-SCTP has a higher overhead than MIP,
but a higher throughput in WLAN
8. Handover protocol
IN Passenger Passenger
…
TCP/
TCP/
UDP
UDP
IP
IP
data data
OUT
Passenger Passenger
…
TCP/
TCP/
UDP
UDP
MIP
IP
IP
IP
IP
data data
MMP- …
CHUNK
Passenger CHUNK Passenger
TCP/
TCP/
UDP
UDP
SCTP
IP
IP
IP
data data
SCTP
9. Handover protocol
L2 Throughput in a WLAN
40,0
35,0
30,0
25,0
Throughput
20,0
(Mbps)
15,0
10,0
5,0
mSCTP
MIP
0,0
0 500 1000 1500
Passenger IP packet size (bytes)
10. Mobility Management Central Mobility Management Train
QoS management
Data QoS- Aggregation
Buffer Gateway
analysis scheduler unit
QoS management
Aggregation QoS- Data
Gateway Buffer
unit scheduler analysis
Tunnel management Tunnel management
Handover protocol Handover protocol
PDF
Monitoring Monitoring
11. Policy Decision Function
Decides on interfaces to be used
Decision based on:
SNR, packet loss, traffic measurements
GPS, speed & management info
IEEE 802.21 MIH events and triggers
Load balancing, cost
12. Mobility Management Central Mobility Management Train
QoS management
Data QoS- Aggregation
Buffer Gateway
analysis scheduler unit
QoS management
Aggregation QoS- Data
Gateway Buffer
unit scheduler analysis
Tunnel management Tunnel management
Handover protocol Handover protocol
PDF
Monitoring Monitoring
13. QoS classes are mapped QoS
on outgoing links
(Load balancing)
buffer Mapping
acceptors manager
5 QoS-classes:
• Background: FTP
• Best effort: Surfing, Email
shaper
• Streaming: Video stream
shaper
• Interactive: VoIP call schedulers
• Priority: Crew Comm.
Data analysis QoS-scheduler Buffer