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Transcript of Matt-Kolon_Wireless_Access.ppt
Copyright © 2003 Juniper Networks, Inc. Proprietary and Confidential www.juniper.net 1
Wireless Access in 2006and Beyond
Matt Kolon
Mobility Architect
2Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Agenda
Mobile technology overview
• GSM, GPRS/EDGE and transition to UMTS WCDMA
• CDMA and CDMA2000 transition to 3G
• WLAN and mobile integration
Planning considerations for wireless access
3Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Intranets/Internet
PSTN/ISDN
WiFi/WiMax
Base Switching Station(GSM/EDGE)
UTRAN (WCDMA)
Mobile Packet Backbone Network
IP Multimedia Subsystem
Access Point
Site Router
Base Transceiver Station (BTS)
Base Station Controller (BSC)
Service Domain
Host Subscriber
Server (HSS)Emergency
Alert System (EAS)
Call Session Control
Function (CSCF)
Media Resource Function
(MRF)
Transit Switching
Center (TSC)
Mobile Switching
Center (MSC)
Serving GPRS Support Node
(SGSN)
Multimedia Gateway
WLAN Access Server
GatewayGSN
MediaGateway
Base Transceiver Station (BTS)
Radio Network Controller (RNC)
Mobile Packet Networks
4Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
GSMGSM GSM WCDMA
HSCSD
GPRS
EDGE
Wireless evolution: 3 major streams
CDMAIS-95A
CDMACDMA
IS-95B
1xRTT 1xEV-DO 1xEV-DVCDMA2000
3xRTT
2G 2.5G 3G
Multiple phases
WirelessWirelessBroadbandBroadband
WiFi WiMAX
5Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
GSM evolution to 3G
GSM9.6kbps (one timeslot)GSM DataAlso called CSD
GSM
General Packet Radio ServicesData rates up to ~ 115 kbpsMax: 8 timeslots used as any one timePacket switched; resources not tied up all the timeContention based. Efficient, but variable delaysGSM / GPRS core network re-used by WCDMA (3G)
GPRS
HSCSD
High Speed Circuit Switched DataDedicate up to 4 timeslots for data connection ~ 50 kbpsGood for real-time applications c.w. GPRSInefficient -> ties up resources, even when nothing sentNot as popular as GPRS (many skipping HSCSD)
EDGE
Enhanced Data Rates for Global EvolutionUses 8PSK modulation3x improvement in data rate on short distancesCan fall back to GMSK for greater distancesCombine with GPRS (EGPRS) ~ 384 kbpsCan also be combined with HSCSD
WCDMA
6Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
CDMAIS-95A
IS-95A14.4 kbpsCore network re-used inCDMA2000
1xRTT
CDMA2000 1xRTT: single carrier RTTFirst phase in CDMA2000 evolutionEasy co-existence with IS-95A air interfaceRelease 0 - max 144 kbpsRelease A – max 384 kbpsSame core network as IS-95
1xEV-DO
CDMA2000 1xEV-DO: Evolved Data Optimised Third phase in CDMA2000 evolutionStandardised version of Qualcomm High Data Rate (HDR)Adds TDMA components beneath code componentsGood for highly asymmetric high speed data appsSpeeds to 2Mbps +, classed as a “3G” systemUse new or existing spectrum
1xEV-DVCDMA2000
3xRTT
CDMA2000 1x Evolved DVFourth phase in CDMA2000 evolutionStill under developmentSpeeds to 5Mbps+ (more than 3xRTT!)Possible end game.
CDMA2000 evolution to 3G
IS-95B
IS-95BUses multiple code channelsData rates up to 64kbpsMany operators gone direct to 1xRTT
7Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
3G Release 99 Packet switched
TDM
PSTN
IP InternetCorporate
IP/AAL5 AUCHLR
SCP
USIM
NodeB
RNC 3G MSC
AAL2
3G SGSNPacket transfer to & from serving areaRegistration, authenticationMobility managementlogical links to RNC, tunnel to GGSNQoS
3G GGSN
Multiple PDP contextsQoS (GPRS extensions for real time traffic classes etc)
Iu b
Iu ps
Iu cs
Iu r
Gn Gi
8Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
3G Release 4
PSTN
InternetCorporate
IP/AAL5USIM
NodeB Media Gatewa
y
BICC Circuit switchedcall control server
(MSC Server)H.248 MEGACO
TDMATMIP
Nb
Split MSC into bearer and controlBearer independent CSNew MGCP, new CS call controlStreaming MMS service using PS streaming service 26.233
TS 23.205 Split
TS 29.414 Bearer
Mc
Media Gateway
(CS-MGW)
9Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
3G Release 5
PSTN
InternetCorporate
IP/AAL5USIM
NodeB
BICC Circuit switchedcall control server
H.248
TDMATMIP
SIP IP MultimediaCSCF
Call Session Control FunctionIP multimedia control sub system (IMS) – IPv6, SIP based
Native IP UTRAN option
UDP/IP or AAL2
Iu b
Iu ps
Iu cs
RTPor
AAL2
23.228 IMS
25.933 IP UTRAN
SIP STAC
K
QoS enhancements (end-to-end)
10Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Mobile IP Applications
WiMAX networks WLAN to cellular roaming Inter GGSN or PDSN roaming
Mobile Core
Internet
SGSN
Mobile Node
FA
Home Network
ESS
Wi-Fi
WAP
FARAN
HA
11Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Mobile IP Interworking with UMTS/GPRS
Recommends use of FA Care Of Addresses (CoA), not collocated, to conserve IPv4 addresses
Source:3GPP
12Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Tight integration proposed by 3GPP
GGSNAccess Controller,
RADIUS RelayAuthenticatorRADIUS/SS-7
GW HLR
EAPoL RADIUS
RADIUS Gr Interface
Create PDP Context {IP, transparent mode APN, IMSI/NSAPI, MSISDN, dynamic address requested}
Create PDP Context Response {End User Address}
DHCP Discover
Client
DHCP Request
DHCP Offer
DHCP Ack {address = End User address from GGSN} Lease
expiration
Delete PDP Context Request
Client - Authentication
Client – IP Address Assignment
GGSN
HLR
GPRS Tunneling Protocol
13Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
High Level IMS Architecture
BTS BSC
SCIM (Service Broker Platform)
RAN TRANSPORT PLANE
CO
NTR
OL
PLA
NE
SER
VIC
E P
LA
NE
SCIM: Service Capability Interaction Manager
MRFC: Multimedia Resource Function Controller
CSCF: Call Session Control Function
HSS: Home Subscriber Server
HLR: Home Location Register
PDF: Policy Decision Function
BGCF: Breakout Gateway Control Function
MGCF: Media Gateway Control Function
MGW: Media Gateway
GGSN: Gateway P\GPRS Support Node
SGSN: Serving GPRS Support Node
HLR
SGSN Intranet/Internet
WLAN
MGW
Node B
RNCPSTNPLMN
MRFC S-CSCF
I-CSCF
P-CSCF BGCF
MGCF
HSS
MGW
MRFP
ABBREVIATIONS
GGSN
14Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Thank You
15Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
Backup Slides
16Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
3GPP2 Reference Architecture
Ref: 3GPP2 A.S0011
Source BSC
MSC/VLR
PDSN
PCF
Source BTS
A9
A8
Aquinter
Reference Point
Aquater
ReferencePoint
(R-P Interface)
A11
A10
A1 A5A2
AReference
Point
A3
A7
AterReference
Point
External IP Network
Pi
Target BSC
HLR
SS7
Ref: 3GPP2 A.S0011
Radio Network
(RN)
17Copyright © 2003 Juniper Networks, Inc. CONFIDENTIAL www.juniper.net
GPRS: General Packet Radio Service
TDM
PSTN
AUCHLR
SCP
SIM
BTS
BSC
Packet Control Unit (PCU)
Forward data frames from TDM BSS to packet core
New hardware in BSC
Serving GPRS Support Node(SGSN)
Packet transfer to, from serving area
Registration, authentication, mobility management / handover, CDRs
logical links to BTS, tunnel to GGSN
Gateway GPRS Support Node (GGSN)Gateway to external IP networks (VPN/ISP etc)IP network securityGPRS session mgmt, AAAACDRs for charging
Packet Switched Core
Circuit Switched
Um
Abis A
& PCU
IP Network InternetCorporate
FRGb
Gn Gi