Transcript Slide6

後卓越計畫
進度報告
楊舜仁老師實驗室
2006.05.01
Outline
Introduction
SIP based mobile QoS model
MH registers the SIP based service
MH initiates the SIP based service
MH moves from one cell to another
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Introduction
 QoS SIP architecture for fixed networks
PDP
QoS signaling (COPS)
Bandwidth
broker
COPS-DRA
Client network
PDP
PEP
PEP
DiffServ
network
COPS-DRA
Access edge router
SIP
PDP
Client network
COPS-DRA
Access edge router
QoS-SIP
QoS-SIP server
SIP
QoS-SIP server
 If Differentiated Services is used in conjunction with Mobile
IP in the mobile environment
 Triangle routing problem
 We proposed SIP based mobile QoS model that used the
multicast technology to manage handoff of the mobile host
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SIP based mobile QoS model
• QoS-SIP proxy server
• the functions of SIP proxy
server
Conventional Reservation
for MH
Predictive Reservation
for MH
• resource reservation
sender
QoS-SIP proxy server
Edge router
• Edge router
• The routers are placed at
the boundary between the
access networks and the
DiffServ core network
• Bandwidth broker
• A logically centralized entity
in charge of managing
resources of whole Diffserv
network
Merge point
Bandwidth
broker
Edge router
Edge router
QoS-SIP
proxy server
QoS-SIP
proxy server
QoS-SIP
proxy server
Mobile host
• It acts as an Admission
Control Server
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MH registers
the SIP based
service
Sender
Q-SIP Mobile proxy
Edge router
(3) reconfigure
Merge point
Bandwidth broker
Edge router
Edge router
(2) IGMP
(2) IGMP
Q-SIP Mobile proxy
A
(2) IGMP
Q-SIP Mobile proxy
Q-SIP Mobile proxy
(1)Registration B
(1)SessionSpec
(modified sip message)
C
(1)SessionSpec
(new sip message)
(new sip message)
MH
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MH initiates
the SIP based
service
Conventional Reservation
for MH
Predictive Reservation
for MH
Sender
Q-SIP Mobile proxy
Edge router
Merge point
Bandwidth broker
Edge router
(3)COPS
Edge router
(3)COPS
(predictive reservation)
(predictive reservation)
(3)COPS
(conventional reservation)
A
Q-SIP Mobile proxy
(2)200 OK
(modified sip message)
(1)Pre-invite
C
B
Q-SIP Mobile proxy
Q-SIP Mobile proxy
(2)200 OK
(1)Invite
(2)200 OK
(modified sip message)
(1)Pre-invite
(modified sip message)
(new sip message)
(new sip message)
MH
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Conventional Reservation
for MH
Predictive Reservation
for MH
Sender
MH moves from
cell B to cell C
Q-SIP Mobile proxy
Edge router
Merge point
Bandwidth broker
Edge router
(3)COPS &
leave Multicast
group
Edge router
(5)COPS
(switchflow)
(3)COPS
(release resource)
(switchflow)
Q-SIP Mobile proxy
(2) TearDown
A
(new sip message)
Q-SIP Mobile proxy
Q-SIP Mobile proxy
B
(4)200 OK
(2)(modified
Invitesip message)
C
(modified sip message)
MH
MH
(1)
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