0aa000003 ngn protocol overview issue2.0
TRANSCRIPT
ISSUEISSUE
Fixed Network Curriculum
Development Section
Fixed Network Curriculum
Development Section
OAA000003 NGN Protocol Overview
OAA000003 NGN Protocol Overview
2.02.0
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Objective Objective
Concepts of SoftX3000 interfaces
and protocols
Classification of SoftX3000 protocols
Roles of SoftX3000 protocols and
signaling
After this session, you will learn:
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ReferencesReferences
Product Manual – Technical Manual – Signaling and
Protocols - Overview
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About this Session About this Session
Interfaces and Protocols
SoftX3000 Signaling System
SoftX3000 Signaling Classification
SoftX3000 Signaling Bearing
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Interface and Protocol Interface and Protocol
An interface is the connection point
between two adjacent network entities,
and a protocol specifies the principles
to be followed for information
interchanging over such connection
points (interfaces) Different protocols
are usually used on different interfaces
and maybe on the same interface as
well.
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SoftX3000 Interfaces and ProtocolsSoftX3000 Interfaces and Protocols
MRS
IADAMG
TMG
SG
SIP
SIGTRAN
H.248
MGCP
MGCP/SIP/H.323
MG
CP
/ H
.248
EPhone
SIP 域
SIP
H.323
MML/SNMP
NMS
FTP/FTAM
BC Service Layer
Control Layer
Access LayerOther Network
SoftX3000 SoftSwitchSS7
H.323 域
PSTN
SCP
INA
P
PA
RL
AY
APP Server
SIP
/INA
P
MG
CP
/ H
.248
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Corresponding Relations between SoftX3000 Interfaces and Protocols
Corresponding Relations between SoftX3000 Interfaces and Protocols
Interface Application Protocols Signaling Transmission Protocols
SoftX3000-SG SIGTRAN M3UA/M2UA/SCTP/IP
SoftX3000-TMG H.248 UDP/IP 、 SCTP/IP 、 TCP/IP
SoftX3000-AMG MGCP 、 H.248 UDP/IP
SoftX3000-IAD MGCP 、 H.248 UDP/IP
SoftX3000-MRS MGCP UDP/IP
SoftX3000-Terminal
MGCP UDP/IP
SIP UDP/IP
H.323 UDP/IP 、 TCP/IP
SoftX3000-SoftSwitch SIP UDP/IP
SoftX3000-PSTN/ISDN SS7 MTP
SoftX3000-SIP SIP UDP/IP
SoftX3000-H.323 H.323 UDP/IP 、 TCP/IP
SoftX3000-NMS MML or SNMP -
SoftX3000-BC FTP or FTAM TCP/IP
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SoftX3000 Protocol SystemSoftX3000 Protocol System
MTP1
IP
TCP
H.248 MGCP SIP
MAC
SS7 H.248 MGCP SIP
MTP3
MTP2
ISUP
SCTP
IP
MAC
SCTPUDP
IP
MAC
UDP
IP
MAC
UDP
1
2
3
4
5
6
7
OSIlayer
IP
H.323
MAC
H.323
TCPUDPM2UA
M3UA
SCCP
TCAP
INAP
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About this Session About this Session
Interfaces and Protocols
SoftX3000 Signaling System
SoftX3000 Signaling Classification
SoftX3000 Signaling Bearing
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SS7 SignalingSS7 Signaling
MACMTP1
MTP2
MTP3
SCCP
TCAP
TUP
ISUP
M3UA
IP
INAP
User part
MTP
M2UASCTP
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SIP ProtocolSIP Protocol
Session Initiation Protocol (SIP) is an
application-layer control protocol that
can establish, modify and terminate
multimedia sessions or calls. It is the
core protocol of IETF multimedia data
and control architecture. It can be easily
expanded, conveniently achieved, and
suitable to implement Internet-based
multimedia conference systems.
The NGN Soft-Switch system
interconnects with other Soft-Switch
systems and SIP domain devices via SIP
signaling, achieving the call control
functions between them.
MAC
IP
UDP
SIP
User Part
MTP
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H.323 ProtocolH.323 Protocol
MAC
IP
H.323
UP
MTP
TCP UDP
Q.931 RAS/H.245
H.323 is a communication control protocol put f
orward by ITU. It provides multimedia communi
cations services over Packet Based Networks
(PBNs). Call control is one of the major parts of
H.323 and can be used to establish point-to-poi
nt media conference and multipoint media conf
erence.
H.323 defines entities such as H.323 Gateways,
Gatekeepers, Multipoint Controllers, Multipoint
Processors and Multipoint Control Units. H.323
Gateways are between Switched Circuit Networ
k (SCN) and packet switched network. Gatekeep
ers provide access control and address translat
ion services. Multipoint Controllers (MCs) provi
de the multipoint control function for the multip
arty conference. Multipoint Processors (MPs) en
ables mixing of multipoint media streams.
H.323 itself is a protocol set, including such pro
tocols as RAS, Q.931 and H.245. RAS is transmi
tted on UDP, Q.931 is transmitted on TCP and H.
245 is transmitted on UDP.
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MGCP and H.248MGCP and H.248
Media Gateway Control Protocol is a master/slave equipment control prot
ocol that provides signaling and call control for Media Gateways and Voic
e over IP (VoIP) terminal devices (the Media Gateway Controller controllin
g the Media Gateway). The protocol is a combination of simple gateway c
ontrol protocols and IP equipment control specifications.
H.248/Megaco is a successor to MGCP and will finally replace it, while thei
r protocol concepts are thoroughly different. With the development of NG
N, the media control protocols between the MGC and the MG will be unifie
d to H.248 gradually.
SoftX3000 Soft-Switch System acts as a MGC in the distributed gateway
model and controls various Media Gateways (such as Access Gateways,
Trunking Gateways, Media Resource Servers, etc.) via MGCP/H.248.
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MGCP and H.248MGCP and H.248
MAC
IP
UDP
MGCP
UP
MTP
SCTP/TCP
H.248
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About this Session About this Session
Interfaces and Protocols
SoftX3000 Signaling System
SoftX3000 Signaling Classification
SoftX3000 Signaling Bearing
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SoftX3000 Signaling ClassificationSoftX3000 Signaling Classification
Signaling transport protocol – Signaling transport layer protocol provi
des SoftX3000 with signaling transport services. One application proto
col of SoftX3000 can usually use multiple transport protocols. For exa
mple, H.248 can use SCTP/TCP/UDP.
Bearer control protocol is a kind of master/slave protocol used for Me
dia Gateway Controller (MGC) to control Media Gateways (MGs), such
as Access Gateways, Trunk Gateways and Residential Gateways from
external call elements like a Call Agent (SoftX3000).
Call control protocol – A protocol used to control call setup, connectio
n and termination. The call control protocols used in SoftX3000 are IS
UP of SS7, SIP and H.323. In a VoIP domain, SIP and H.323 serve for ca
ll control in multimedia conference. ISUP is the call control protocol us
ed for the switched circuit network. 。
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Signaling Transmission ProtocolsSignaling Transmission Protocols
IP, TCP, UDP.
SCTP: Stream control transport protocol
M2UA - - User adaptation layer protocol of SS7 MTP2.
M3UA - - User adaptation layer protocol of SS7 MTP3.
MTP (Message Transport Protocol) - - SS7 network
protocol of TDM.
SCCP - -Providing INAP with signaling transmission
service
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Bearer Control Protocols Bearer Control Protocols
Bearer control protocol is used to control media
gateways.
MGCP and H.248 protocols
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Call Control ProtocolsCall Control Protocols
ISUP and INAP -- Switched circuit network control
protocols.
H.323 and SIP - -Call control protocols in packet
switched network
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AttentionAttention
Bearer control protocols are non-peer-to-peer
protocols, used between MGC and MG only, while call
control protocols are peer-to-peer protocols, used
between MGC and MGC, that is, namely, inter-office
signaling.
MGCP and H.248 protocols accomplish the bearer
control functions in the communication between TMG
and MGC, and the call control protocol above them is
ISUP. In communication between AG and MGC, ISUP
has the call control functions (for example,
identification of hanging on, hanging off, etc.) in
addition to the bearer control functions.
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About this Session About this Session
Interfaces and Protocols
SoftX3000 Signaling System
SoftX3000 Signaling Classification
SoftX3000 Signaling Bearing
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SoftX3000 Signaling Bearer Hardware Path SoftX3000 Signaling Bearer Hardware Path
BFII IFMI BSGIBFII IFM BSGI
SIGTRAN
FCCU
MGCP
H.248FE
BFII IFMI BSGIBFII IFM MSGI
FCCU
SIP
H.323FE
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Question/issueQuestion/issue
What protocols does SoftX3000 adopt?
In what occasions are these protocols
used?
Write the path of MGCP.
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Answer1Answer1
Interface Application Protocols Signaling Transport Protocols
SoftX3000-SG SIGTRAN M2UA/SCTP/IP
SoftX3000-TMG H.248 UDP/IP、 SCTP/IP、 TCP/IP
SoftX3000-AMG MGCP、 H.248 UDP/IP
SoftX3000-IAD MGCP、 H.248 UDP/IP
SoftX3000-MRS MGCP UDP/IP
SoftX3000-EphoneMGCP UDP/IP
SIP UDP/IP
SoftX3000-SoftSwitch SIP UDP/IP
SoftX3000-PSTN/ISDN SS7 MTP
SoftX3000-SIP entity SIP UDP/IP
SoftX3000-NMS MML or SNMP -
SoftX3000-BC FTP or FTAM -
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Answer 2Answer 2
FE——BFII——IFMI——BSGI——MGCP processing
module on FCCU
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Summary Summary
SoftX3000 uses the following protocols: SIGTRAN, MGC
P, H.248, H.323, SIP and ISUP.
SIGTRAN protocol group is used when SoftX3000 is inte
rconnected with PSTN, over which the ISUP protocol is
borne. MGCP and H.248 protocols are used for intercon
nection with various MGs. H.323 and SIP protocols are u
sed for interconnection among SoftSwitch devices, and
meanwhile, H.323 can also be used for interworking with
H.323 media terminal, while SIP can be used for interwor
king with SIP terminal.
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