Transcript All IP 3G Movements 3GPP Network Architecture 3GPP2 Network

All IP Mobile Network
2001년 11월 28일
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Contents
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
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All IP
3G Movements
3GPP Network Architecture
3GPP2 Network Architecture
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All IP
 Advantage
 An all IP core allows the intelligence to migrate to the edge of the
network and so allows, dumb, cheap, easily upgradeable routers to be
used for traffic delivery.
 Easy integration of wireless LANs.
 Mobility
 Roaming
 Unified set of services
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3G Movements
 Wireless industry is evolving its core networks toward IP technology.
 Global wireless industry has created two new partnership projects:
 3rd Generation Partnership Project (3GPP) is developing 3G standards for
GSM-based systems.
 3rd Generation Partnership Project 2 (3GPP2) is developing 3G standards
for IS-95-based CDMA systems.
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3GPP Network Architecture (1)
 In evolving to an IP core network, 3GPP has decided to base it on
GPRS.
 GPRS based approach provides packet data access in 3GPP.
 Ad-hoc group developed requirements for network architecture
based on an all-IP network.
 Mobile terminal would include IP-based clients.
 To provide separation of service control from connection control.
 To support VoIP, call control function analogous to call control in a
circuit-switched environment are provided by the call state control
function (CSCF).
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3GPP Network Architecture (2)
 The aim of the all IP architecture is to allow operators to deploy IP
technology to deliver 3rd Generation services.
 Based on packet technologies and IP telephony for simultaneous real
time and non real time services.
 Characteristics
 Based on an evolution of GPRS
 Common network elements for multiple access types including UTRAN
and ERAN
 Packet transport using IP protocols
 Support for voice, data,real time multimedia, and sevices with the same
network elements.
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3GPP Network Architecture (3)
 Benefits
 Ability to offer seamless services, through the use of IP, regardless of
means of access (e.g. common features used by subscribers whether
accessing via conventional land telephony, cable, wireless, HPERLAN 2,
etc.)
 Synergy with generic IP developments and reduced cost of service
 Efficient solution for simultaneous multi-media services including voice,
data, and advanced real time services.
 Higher level of control of services
 Integrated, and cost reduced operations and maintenance through IP
 Take advantage of Internet applications by supporting terminals which are
IP clients.
 Cost reduction through packet transport
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3GPP Network Architecture (4)
 General Requirements
 The overall aim of the all IP network is to support similar services to GSM
release ’99 and new innovative services. Where appropriate these
services should inter-work with existing GSM services.
 In addition it should also possible to support existing (R99 and before)
services/capabilities (speech, data, multimedia, SMS, supplementary
services, VHE,...)in a manner that is transparent to the users of these
services. That is, the network needs to provide the service capabilities
required in such a way as to support interworking of these services
between the R00 all IP network option and the other family networks two
domain architecture option (GSM pre Release 99, UMTS release 99).
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3GPP Network Architecture (5)
 The standard shall enable the all IP core network to support release 99
CS terminals. This shall be standardised in such a way as to allow
operators to decide whether or not they wish to support Release 99 CS
only terminals.
 The support of existing services shall not preclude the extension of
service capabilities possible through the use of an all IP architecture.
 When the all IP networks are deployed, there will be services and
databases provided for existing networks which are non-IP based e.g.
local number portability, free phone numbers, specialised corporate
services. The all IP architecture will need to be able to access these
services.
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3GPP Network Architecture (6)
 R’00 all IP core network shall allow implementations having a CS and a
PS domain, that are separated like both these domains in the R’99
architecture. This implementation allows the two domains to evolve
independently, e.g. to combine an all IP R’00 PS domain with a STM
based R’99 CS domain. Furthermore it shall be possible to implement a
CS domain that uses all IP based architecture and in distinct service
areas of the same network a CS domain based on ATM/STM. This
allows a smooth migration to an all IP based core network.
The R’00 all IP architecture shall support that all services share bearer
level transport and bearer control.
R’00 architecture shall allow an operator to migrate a R’99 network into
a R’00 network, without need for change of transport network technology,
node numbering scheme etc. R’00 networks shall also allow connection
of R’99 UTRAN over Iucs, to provide the operator with flexibility in the
network implementation.
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3GPP Network Architecture (7)
 Option 1. Working architectural approach
 The All IP Core network is engineered primarily to use a common technology (IP)
to support all services including multimedia and voice services controlled by
H.323/SIP or ISUP.
 Network architecture is based upon IP packet technologies for simultaneous realtime and non-real-time services.
 Network architecture is based upon an evolution of GPRS.
 For support of R99 CS domain services the R99 CS domain CC mechanism may
be reused. (NOTE: This does not prevent alternative mechanism such as H.323,
SIP or evolved forms of R99 CS domain CC mechanisms being used by operators
to deliver R99 CS domain services)
 For the support of release 00 terminals are IP based, and the integration of
services is obtained through IP.
 Network architecture should support personal mobility and interoperability between
mobile and fixed networks for both voice and data services.
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3GPP Network Architecture (8)
 Maintain or improve quality of service levels when compared to today’s
networks.
 Maintain or improve network reliability when compared to today’s
networks.
 All IP interfaces and associated network interfaces should be enhanced
to support real-time multimedia services.
 Network architecture will provide a separation of service control from
call/connection control.
 Network architecture will replace SS7 transport with IP.
 Network architecture will be independent of network transport layers of
Layer 1 (L1) and Layer 2 (L2).
 Regardless of service type, ISUP based or IP based, IP transport shall be
possible for all signalling and data transport.
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3GPP Network Architecture (9)
- Option 1
Legacy mobile
signaling
Network
Applications
& Services
SCP
Alternative
Access
Network
R-SGW
Ms
Mh
Multimedia
IP Networks
CSCF
Mw
Mm
HSS
CAP
CSCF
Cx
Gr
TE
TE
Um
Iu-ps'
Iu
Uu
Gn
SGSN
GGSN
Gn
Gp
Mr
Mg
MRF
Gi
SGSN
UTRAN
MT
R
Gc
ERAN
MT
R
Gi
Gf
Gi
MGCF
T-SGW
Mc
Gi
MGW
PSTN/
Legacy/External
EIR
GGSN
Other PLMN
Signalling Interface
Signalling and Data Transfer Interface
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3GPP Network Architecture (10)
- Option 2
Alternative
Access
Network
Legacy mobile
signaling
Network
Applications &
Services *)
SCP
Mh
SGSN
GGSN
Other PLMN
CSCF
R
Um
Iu-ps'
TE
UTRAN
MT
R
Uu
1
Iu = Iucs (RTP,
Iu
MGCF
Gi
Gc
T-SGW *)
Mc
GGSN
SGSN
Iu
Gi
MRF
Gf
ERAN
MT
Mg
Mr
Gi
EIR
TE
Mm
Cx
HSS *)
Gr
Gp
2
Mw
CAP
Gn
Multimedia
IP Networks
CSCF
R-SGW
Ms
Gi
Gn
Iu 1
MGW
MGW
Iu 2
Nb
Mc
AAL2)
Mc
Nc
MSC server
= Iu (RANAP)
PSTN/
Legacy/External
GMSC server
T-SGW *)
MAP
MAP
Applications
& Services *)
Signalling Interface
Signalling and Data Transfer Interface
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Mh
HSS *)
R-SGW *)
*) those elements are duplicated for figure
layout purpose only, they belong to the same
logical element in the reference model
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3GPP2 Network Architecture (1)
 3GPP2 has created a new packet data architecture building on the
CDMA 2G and 3G air interface data services.
 3GPP2 has taken advantage of 3G high data rates and existing work in
IETF on Mobile IP to enhance the network architecture to provide IP
capabilities.
 Ease in interworking and roaming with other IP networks.
 It can provide private network access (virtual private networking) via a
Mobile IP tunnel and IP security.
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3GPP2 Network Architecture (2)
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3GPP2 Network Architecture (3)
 Packet Data Serving Node (PDSN)
 Establishes, maintains, and terminates Point-to-Point Protocol (PPP)
sessions at the mobile station.
 When simple IP is used, the PDSN also assigns IP addresses to the users.
At this point is connected.
 The PDSN also initiates the security sessions that the AAA provides.
 Authentication, Authorization, and Accounting (AAA) server
 The AAA is responsible for most of the security aspects of the core
network in cdma2000.
 The AAA can authorize users and provide user profiles and QoS
information to requesting nodes and can also optionally assign IP
addresses.
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3GPP2 Network Architecture (4)
 Base Station (BS)
 A BS is an entity that provides the means for MSs to access network services using
radio.
 It includes a BSC and a BTS.
 Base Station Controller (BSC)
 The BSC is an entity that provides control and management for one or more BTSs.
 The BSC exchanges messages with both the BTS and the MSC. Traffic and
signaling concerned with call control, mobility management, and MS management
may pass transparently through the BSC.
 Base Transceiver System (BTS)
 The BTS is an entity that provides transmission capabilities across the Um reference
point.
 The BTS consists of radio devices, antenna and equipment.
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3GPP2 Network Architecture (5)
 Home Agent (HA)
 The HA is an entity that:
Authenticates Mobile IP registrations from the mobile station.
Redirects packets to the foreign agent component of the PDSN, and optionally
receive and route reverse packets from the Foreign Agent component of the PDSN.
May establish, maintain and terminate secure communications to the PDSN.
Receives provisioning information from the AAA function for users.
May assign a dynamic home IP address.
 Home Location Register (HLR)
 The HLR is the location register to which a user identity is assigned for record
purposes such as subscriber information (e.g. Electronic Serial Number (ESN),
Mobile Directory Number (MDN), Profile Information, Current Location,
Authorization Period).
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3GPP2 Network Architecture (6)
 Mobile Switching Center (MSC)
 The MSC switches circuit mode MS originated or MS terminated traffic. An MSC
is usually connected to at least one BS. It may connect to the other public networks
(PSTN, ISDN, etc.), other MSCs in the same network, or MSCs in different
networks. The MSC may store information to support these capabilities.
 Packet Data Network (PDN)
 A PDN, such as the Internet, provides a packet data transport mechanism between
processing network entities capable of using such services.
 Visitor Location Register (VLR)
 The VLR is the location register other than the HLR used by an MSC to retrieve
information for handling of calls to or from a visiting subscriber. The VLR may, or
may not be located within, and be indistinguishable from an MSC. The VLR may
serve more than one MSC.
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