sokol, 10/2000 1 internet/intranet icsi icsi - network services and application usaia - ubiquitous...

ICSI - Network Services and Application

Sokol, 10/2000 1Internet/Intranet

ICSI

USAIA - Ubiquitous Service Access Internet Architecture -

Joachim Sokol, ZT IK 2



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

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

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



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

.

Global

AD

Local

(DiffServ)

MPLS/DiffServ

IntServ/RSVP

Services

Ad

min

istr

atio

nApplications

NetworkManagement

MobilityManagement

QoSManagement

USAIA



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

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

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

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

• 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

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

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

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

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

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

sokol, 10/2000 1 internet/intranet icsi icsi - network services and application usaia - ubiquitous...

Documents

mobility movement

movement slide

protocols qos qos setup

used service

application usaia slow

previous fa

new fa buffer management

driven communication