1. IBBT Tr@ins
WP6: Interworking
Daan Pareit
IBBT – IBCN – Ghent University

2. Interworking
2

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

14. Demo & questions
14