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IMS for Dummies
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SGSN GGSN P-GW = Packet GateWay – basically the same thing as PDSN in CDMA Serving GRPS Node – Handles IP Mobility ? Gateway GPRS Node: Packet Routing, DHCP, etc. (not PPP, there is special layer 2 for 4G RAN), also native IPV6. Policy Decision Function (QoS) Proxy – CSCF Basically a signaling SBC. Terminates SIP and re-launches, looks like a B:B UA. May also provide TLS/SSIP. Interrogating -CSCF Serving -CSCF Scaling Resource. What CSCF to point to. SIP++ SIP Location Server, Call Flow Management. Call Session Control Function (CSCF) – SIP Proxies Media Resource Function Diameter (Radius++) Application Server Application Server Application Server SIP++ SIP++ Diameter Transcoding, Media Termination, Messages, etc. Home Subscriber Service and the subcriber dB. Services (service profiles, Authorization), Identity (Authentication), Triggers (ICFs) RTP or SRTP Media GateWays RTP Radio Access Layer. ENUM DNS Call Routing Between Networks. (note, there are also other servers that handle call routing iif not in ENUM Elliot’s IMS (+/-) for Dummies MME/GW eNode-B IP Internet APN (APN == VPN) IMS APN Admin APN, Enterprise APN, etc. MRFC SIP++ MEGACO (H248)
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Transcript of IMS for Dummies
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SGSN
GGSN
P-GW = Packet GateWay basically the same thing as
PDSN in CDMA
Serving GRPS Node Handles IP Mobility ?
Gateway GPRS Node: Packet Routing, DHCP, etc. (not PPP, there is special layer 2 for 4G RAN), also native IPV6.
Policy Decision Function (QoS)Proxy CSCF
Basically a signaling SBC. Terminates SIP and re-launches, looks like a B:B UA.
May also provide TLS/SSIP.
Interrogating -CSCF
Serving -CSCF
Scaling Resource. What CSCF to point to.
SIP++
SIP
Location Server, Call Flow Management.
Call Session Control Function (CSCF) SIP
Proxies
Media Resource Function
Diameter(Radius++)
ApplicationServer
ApplicationServer
ApplicationServer
SIP++SIP++
Diameter
Transcoding, Media Termination, Messages, etc.
Home Subscriber Service and the subcriber dB. Services (service
profiles, Authorization), Identity (Authentication), Triggers (ICFs)
RTP or SRTP
MediaGateWays
RTP
Radio Access Layer.
ENUM DNS
Call Routing Between Networks. (note, there are also other servers that handle call routing iif not in ENUM
Elliots IMS (+/-) for Dummies
MME/GW
eNode-BIP
Internet APN (APN == VPN)IMS APN
Admin APN, Enterprise APN, etc.
MRFCSIP++ MEGACO (H248)
