IPv6 Transition for Mobile Operators - apricot

22 Pages·2011·2.05 MB·English

IPv6 Transition for Mobile Operators
Kasu Venkat Reddy
Senior Solutions Architect
Agenda
(cid:1)
Motivation
(cid:1)
IPv6 in GSM/UMTS Architecture
(cid:1)
IPv6 in EPS (LTE/EPC) Architecture
(cid:1)
Transition Solutions
(cid:1)
Summary
Motivation
(cid:1)
Success of Mobile Internet and increase
in Smartphone numbers is rapidly
exhausting IPv4 address pools
(cid:1)
IANA global IPv4 -address pool
exhausted on FEB 03 2011
(cid:1)
Even private IPv4 addresses has
bbeeccoommee ssccaarrccee
Each 10.0.0.0 network can support
***
Global Smartphone unit shipment forecast (iSuppli) **
about 16.7 million addresses
(cid:1)
3GPP and IETF already have well
defined standards
(cid:1)
IPv6 simplifies Network Architecture by
providing universal connectivity
Global endpoint reachability
Peer-2-Peer networking as an example
* Source: http://www.mobile-tech-today.com/story.xhtml?story_id=65091
** Source: http://www.ciol.com/Biz-Watch/News-Reports/Smartphones-ring-in-healthy-growth-in-2009/5309116823/0/
*** See see http://www.potaroo.net/tools/ipv4/index.html for more details
IPv6 in GSM/UMTS
AArrcchhiitteeccttuurree
Presentation_ID © 2009 Cisco Systems, Inc. All rights reserved. Cisco Confidential
Mobile 3G Internet Access
GPRS/UMTS
AAA/HLR
Gr Gc
GERAN
(2.5G) Gb
BTS Gn/Gp
Gi
Internet
Iu SGSN GGSN
UTRAN
((33GG))
NNooddeeBB
PDP Context
(cid:1)
PDP Contexts / Bearer
IPv4 only: UE – GGSN link is “IPv4 only”
IPv6 only: UE – GGSN link is “IPv6 only”
IPv4v6 (>= Rel. 9): UE – GGSN link transports IPv4 and
IPv6 (and has /64 prefix and IPv4 address configured)
IPv6 Impact on RAN and SGSN
Application
IP, PPP, .. IP, PPP, ..
Relay Relay
PDCP
PDCP GTP-U GTP-U GTP-U GTP-U
RLC RLC UDP/IP UDP/IP UDP/IP UDP/IP
MAC MAC L2 L2 L2 L2
LL11 LL11 LL11 LL11 LL11 LL11
MS Uu UTRAN Iu-PS 3G-SGSN Gn 3G-GGSN Gi
(cid:1)
Assumption: NodeB, RNC, SGSN, GGSN not co-located
(cid:1)
GPRS/UMTS attachment: Standard UMTS procedure
UE will send PDP create request.
RNC will forward attach request to SGSN using IuPS signaling:
Can be over IPv4 or IPv6
(cid:1)
SGSN (and RNC in case of direct tunneling) need IPv6 awareness
PCO relay
APN selection
IPv6 Integration in 3G Networks
Design Considerations
Content providers
RAN
Policy WAP Internet
NodeB
DMZ
Femto HNB RNC
Gn/Gp (GTP) DPI
Gn NAT
Core Network
Ga GGSN
SGSN
(GTP’) Ga (GTP’)
GRX IMS Core
DNS
Ga (GTP’)
IXC RADIUSQS
Charging Roaming DDHHCCPP DDSaaigttaanaling
BBiilllliinngg SSyysstteemm GGaatteewwaayy ppaarrttnneerrss
Element Design consideration (If IPv6 is used for internet & internal Apps) Impact
eNodeB Radio layer. Can use IPv4 backhaul No
RNC Iu-CS/Iu-PS can use IPv4 backhaul No
SGSN Initiate mobile APN query & authentication Yes
HLR/HSS IPv6 capable Yes
GGSN IPv6 PDP, standards IPv6 features, prefix allocation Yes
Billing Mediation and processing of IPv6 CDR Yes
DPI, Quote Server Pre-paid implementation, IPv6 parsing & CDR capability Yes
WAP, Data Accelerator IPv6 packet compressions, cache capability Yes
Firewalls IPv6 rules capability, performance Yes
DNS IPv6 DNS capability Yes
IPv6 in EPS (LTE/EPC)
AArrcchhiitteeccttuurree
Presentation_ID © 2009 Cisco Systems, Inc. All rights reserved. Cisco Confidential
3GPP EPS Architecture
IPv6 Deployment Domains
HSS SWx(DIAMETER)
S12 (GTP-U)
UTRAN
S4(GTP-C, GTP-U) S6a PCRF
(DIAMETER)
SGSN
GERAN Rx+
S3
MME
(GTP-C)
S11 Gxc
(GTP-C) (Gx+) 3GPP
Gx Gxa Gxb
S1-MME S10 AAA
(S1-AP) (GTP-C) (Gx+) (Gx+) (Gx+)S6b
(DIAMETER)
S5 (PMIPv6, GRE) Operator’s x-CSCF
E-UTRAN S1-U SGi IP Services
S5 (GTP-C, GTP-U) PDN-GW
(GTP-U)
UUEE eeNNBB SS--GGWW
SWm
(DIAMETER)
S2a
S2b
(PMIPv6, GRE SWa
(PMIPv6,
MIPv4 FACoA) (TBD)
GRE)
STa(RADIUS, ePDG
DIAMETER)
SWn
(TBD)
Trusted Non-3GPP
IP Access
UntrustedNon-3GPP
IP Access
SWu(IKEv2,
MOBIKE, IPSec)
Initial Deployment Objective / Driver
1(cid:1) Enable IPv6 customer applications 2(cid:1) Enable IPv6 transport
IPv6 Home-PLMN
IPv6 for user plane interfaces
IPv6 Visted-PLMN
IPv6 related attributes for control plane interfaces
IPv6 Interconnect-PLMN
IPv6 related attributes for policy/charging/control
interfaces
Note: Protocol choice analysis in TR 29.803
EPS Bearer Types
(cid:1)
IPv4 only bearer
Dual Stack
The link is “IPv4 only”: One IPv4 Address results in 2
EPC Bearers
(cid:1)
IPv6 only bearer
(i.e. two interfaces
on PGW);
The link is “IPv6 only”:
Can be supported
One /64 prefix per bearer;
OOnnee IIPPvv66 AAddddrreessss oonn UUEE wwiitthhiinn tthhee ssaammee AAPPNN
(cid:1)
IPv4v6 bearer (since Rel-8)
Dual Stack
The link is “dual-stack”: The bearer is configured with
results in 1
both IPv4 address and one /64 prefix.
EPC Bearers
v4v6 bearer type is the default in Rel-8 and beyond
(i.e. one interface
If v4v6 bearer establishment fails and only a on PGW)
single stack bearer is enabled for UE, UE “should”
try to establish separate PDN connection for
missing stack