sokol, 10/2000 1 internet/intranet icsi icsi - network services and application usaia - ubiquitous...
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ICSI - Network Services and Application
Sokol, 10/2000 1Internet/Intranet
ICSI
USAIA - Ubiquitous Service Access Internet Architecture -
Joachim Sokol, ZT IK 2
ICSI - Network Services and Application
Sokol, 10/2000 2Internet/Intranet
ICSI
Some Problems
• packets in tunnel not subject for IntServe behavior
RSVP tunnel and UDP encapsulation
•service classes do not cover additional delay of handoff procedure
location dependent service class. QoS is valid only at one location (re-negotiation for others)
location independent service class. QoS must be set-up in advance (passive/active reservation)
• packets in transit to the previous FA are lost, when MH moves to a new FA
buffer management for Mobile IP (request to previous FA to buffer data)
• Receiver initiated RESV messages must also follow the detour through tunnel between HA and care-of-address
IP-in-IP Tunnel between HA and FA must be used in reverse direction for all RSVP related
control traffic. Non-RSVP related data must follow normal routed path.
ICSI - Network Services and Application
Sokol, 10/2000 3Internet/Intranet
ICSI
RSVP und MobileIP
FA Foreign Agent CH Correspondent Host SenderHA Home Agent MH Mobile Host Receiver
Backup
HAMH Receiver
MH
CH Sender
FA
HomeNetwork
ForeignNetwork
Control &Data in IP in IPTunnel
PATH/RESV message before movement
tunneled PATH/RESV message after movement
ICSI - Network Services and Application
Sokol, 10/2000 4Internet/Intranet
ICSI
What is necessary ?
• hierarchical mobility management to allow fast handoff for real-time communication
avoiding complexity wherever possible (additional servers, protocols)
• QoS
QoS setup in advance with quantitative description of requested QoS
termination of RSVP at well-defined location
de-coupling of QoS and Mobility (movement do not influence QoS)
intelligent CAC
backward compatibility to existing approaches as much as possible
• end system allow for seamless (wireless) communication policy-based driven communication
ICSI - Network Services and Application
Sokol, 10/2000 5Internet/Intranet
ICSIUSAIA
Slow, FastMobility
Service availability is the goal !
Base Stations (Router)transmitting Beacons Ads
Provider/domain networks equipped with services and hierarchical mobility management with SFAs and DFA or MPLS capable LSRs
technology,provider independent access
Access is the killer app !
Integrated Service Modelwith Advanced QoS Setup
MPLS / (DiffServ) Differentiated Services / (MPLS)
Global Mobility (Ads)
SFA Subnet Foreign AgentDFA Domain Foreign AgentCN Correspondent HostMPLS Multi Protocol Label Switching
Most used service will be audioor voice basedduring movement
Cellular
Cellular
Cellular
SFA
(D)FA
HA
CN
Internet
Local, (cells) , AD (subnetworks)Mobility
SFA
(D)FA
SFA(D)MA
Local CN
ICSI - Network Services and Application
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ICSI
.
Global
AD
Local
(DiffServ)
MPLS/DiffServ
IntServ/RSVP
Services
Ad
min
istr
atio
nApplications
NetworkManagement
MobilityManagement
QoSManagement
USAIA
ICSI - Network Services and Application
Sokol, 10/2000 7Internet/Intranet
ICSI
USAIA
contributions from
• Joachim Sokol (Siemens AG)
• Scott Shenker (ACIRI)
• Dietmar Tutsch (TU Berlin)
• Jörg Widmer (University Mannhein)
• Michael Bahr (Siemens AG)
• Henry Owen, Vasos Vassiliou (Georgia Institute of Technology)
ICSI - Network Services and Application
Sokol, 10/2000 8Internet/Intranet
ICSI
IP equipment (chipsets, networking boxes, ..) are getting more and more cheap
wireless access will be common access technology to the Internet information access on current location
developing countries without expensive telco infrastructure
emergency areas
ISP competition on differentiation of available services IP will be the dominating technology of all kind of traffic easy and fast setup of (access-) networks necessary emergencies, events, connectivity in unserved markets, provision of networks with new services
USAIA
Motivation
ICSI - Network Services and Application
Sokol, 10/2000 9Internet/Intranet
ICSI
t
QoS
t
QoS
1) start application at time t0 at location L0. QoS is not available (like busy phone call)
2) re-start, QoS available at location L0
3) end application
1 2 3
t0t0
1 2 3 4 5 6 7
1) start application at time t0 at location L0. QoS is not available like busy phone call)
2) re-start, QoS available at location L0
3) handoff to location L1, no QoS available
4) handoff to location L2, partial QoS available
5) and 6) like 3) and 2)
7) end application
stationary case mobile case
USAIA
ICSI - Network Services and Application
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ICSI
T P (Q (ti,Li,r)) = P (Q (T, L 1 , r))t=2
Q (t,L,r) = {0,1} QoS user gets at location L at time t0 <= t <=T for request r
de-coupling QoS and Mobility
Mechanisms:• new handoff protocol LHP for QoS support
• modified RSVP for signaling in advance
• overlapping cell areas
• bandwidth partitioning in BS
• control layer in end system
• extension of Controlled-Load Service Class
• load-dependent refresh time interval for reservation in advance
USAIA
ICSI - Network Services and Application
Sokol, 10/2000 11Internet/Intranet
ICSI
• beacons indicating available BW
• load balancing (frequency of beacons)
• passive reservations
• RSVP termination in BS for passive reservation
• mapping to DiffServ / MPLS
• Local Handoff Protocol (LHP)
• bandwidth partitioning (BE shares passive area)
• QoS range in Controlled Load Service
• MN extended for control layer• sense signal strength • triggers RSVP for advanced reservation
• Local Handoff Protocol (LHP)
• passive reservations with modified RSVP
Application Proxy
Higher Layer
IP
Control
WST1 WST2 ...
RSVP ext
wired
IP
bandwidth control ==>
continuous reservation (active/passive)initial reservationbest effort
MAC / PHYS
RSVP ext
LHP
Active/passive
Reservations
USAIA
ICSI - Network Services and Application
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ICSI
MN New BS Old BS
Beacon [QoS]
Announce
Announce_Ack Data
...
Passive RESV
.
.
.
Announce [T]
NotifyAnnounce_Ack
Router/local CHs
Gratuitous ARPData
RESV_Conf
USAIA
ICSI - Network Services and Application
Sokol, 10/2000 13Internet/Intranet
ICSI
BS3
BS2
BS1
active reservation
(1)
BS3
BS2
BS1
active and passivereservation
(2)
passive reservation turns into active
(3)
active reservationpassive reservation
BS3
BS2
BS1
timeout
movementpath
USAIA
ICSI - Network Services and Application
Sokol, 10/2000 14Internet/Intranet
ICSI
USAIA
current work
• extensions for ns tool for modified RSVP, LHP
• prototype (Linux) based on HUT (Helsinki University of Technology)
• mathematical description of USAIA (Markow chains)
• Ph.D. for derivation of “mobile” related parameters for CLS
• mapping to future generation of wireless networks (3G, 4G, 5G ?)
• generic study of “reservation of in advance” mechanisms
ICSI - Network Services and Application
Sokol, 10/2000 15Internet/Intranet
ICSI
SGSN
SGSN
SGSN
GGSN
Server
Tunnel
GPRSbackbone
Site 1
Site 2
Site 3
PDN (Internet)
RAN
RAN
RAN
MSC/VLR
HLR
BS per cellBSC
GPRS
local AD global
BSC: Base Station ControllerGGSN: Gateway GPRS Support NodeHLR: Home Location RegisterMSC: Mobile Switching CenterPDN: Packet data networkSGSN: Serving GPRS Support NodeVLR: Visitor Location Register
QoS “islands”
Multicast “islands”ubiqitious and
arbitrary access
ICSI - Network Services and Application
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ICSI
UMTS U-plane
L1
RLC
PDCP
MAC
E.g., IP,PPP,OSP
Application
L1
RLC
PDCP
MAC
ATM
UDP/IP
GTP-U
AAL5
Relay
L1
UDP/IP
L2
GTP-U
E.g., IP,PPP,OSP
3G-SGSNUTRANMS
Iu-PSUu Gn Gi
3G-GGSN
ATM
UDP/IP
GTP-U
AAL5
L1
UDP/IP
GTP-U
L2
Relay