Upload
dangthien
View
222
Download
3
Embed Size (px)
Citation preview
www.telkomuniversity.ac.id
Fathur AB
Anin A
Afif A
Hari A
Gary A
Dhika AB
April AB
Mulya AB
Rizka B
Dion AB
Siska AB
Mirel AB
Hani AB
Airita AB
Yusuf AB
Pilsung AB
Taegyun A
www.telkomuniversity.ac.id
Signaling Transport Stream Control Transmission Protocol
Course Number : TTH2A3
CLO : 2
Week : 7
www.telkomuniversity.ac.id
Media Gateway on NGN
• Media Gateway (MG)
– On Transport plane that connects different type of network – Trunk Gateway, connects packet-based network with trunk network from PSTN
or ISDN – Access Gateway, provides services to CPE – Residential Gateway, connects
packet-based network with analog network
• Signaling Gateway (SG)
– Transforming signaling format, ex. SIP SS7
• Media Gateway Controller (MGC)
– Control Media Gateway and Signaling Gateway
– aka. Soft Switch (call setup for multimedia communication, detect and manage events, and manage media gateway based on configuration)
– Use MGCP (MGC Protocol) from ITU-T or Megaco from IETF
www.telkomuniversity.ac.id
Layers in NGN
4
www.telkomuniversity.ac.id
Signaling Transport (SIGTRAN)
www.telkomuniversity.ac.id
SIGTRAN and SCTP
• SIGTRAN = Signaling Transport
• IETF standard since 2000 (IETF = Internet Engineering Task Force) for transmitting PSTN Signal (SS7) via IP Network
• SCTP supports node-to-node transport for SS7 traffic between SG/MG and MGC
Note:
• SG = Signaling Gateway
• MG = Media Gateway
• MGC = MG Controller
www.telkomuniversity.ac.id
SS7 Architecture
1. Signaling Data Link defines the physical, electrical and functional characteristics and the means to access it
2. Signaling Link defines the functions and procedures for and relating to the transfer of signaling messages over one individual signaling data link
3. Signaling Network defines those transport functions and procedures that are common to and independent of the operation of individual signaling links
4. User Part
www.telkomuniversity.ac.id
SIGTRAN Protocol
SS7’s MTP1 and MTP2 are replaced by SIGTRAN to enable signaling over IP
www.telkomuniversity.ac.id
User Adaptation (UA) Layers – M2PA
• Function: encapsulates any other signaling protocol to be transmitted via IP network through SCTP, ex. MTP2’s user Peer-to-peer Adaptation layer (M2PA) transform SS7 MTP signaling messages
• M2PA provides SS7 over IP Network
www.telkomuniversity.ac.id
User Adaptation (UA) Layers – M2UA
• MTP2 User Adaptation layer (M2UA) sends signaling message between MTP3’s MGC and MTP2’s SG
• Works as client-server, where MGC (IP node) acts as client and SG as server
Note:
• MGC = Media Gateway Controller
• SG = Signaling Gateway
www.telkomuniversity.ac.id
User Adaptation (UA) Layers – M3UA
• MTP3 User Adaptation (M3UA) works as client-server to provide remote connection for backhauling
Note:
• MGC = Media Gateway Controller
• SG = Signaling Gateway
• SCCP = Signalling Connection Control Part
• TCAP = Transaction Capabilities Application Part
www.telkomuniversity.ac.id
User Adaptation (UA) Layers – SUA
• SUA (SCCP User Adaptation) provides other transformation capabilities for legacy services, such as toll free, prepaid, and roaming
• 3GPP chooses M3UA for UMTS signaling protocol due to SUA limitation on transporting ISUP messages
Note:
• MGC = Media Gateway Controller
• SG = Signaling Gateway
• SCCP = Signalling Connection Control Part
• TCAP = Transaction Capabilities Application Part
www.telkomuniversity.ac.id
Stream Control Transmission Protocol (SCTP)
www.telkomuniversity.ac.id
What is SCTP?
SCTP is the transport protocol for SIGTRAN, which makes every transformed signaling message from Adaptation Layer can be transferred via IP Network
www.telkomuniversity.ac.id
Why SCTP?
• UDP unreliable due to the nature of no ACK
• TCP reliable, but head-of-line blocking creates long transmission delay when a packet found as ERR
• SCTP reliable, and independent messages creates shorter re-transmission
www.telkomuniversity.ac.id
See you on next class