IP Multimedia Subsystem: differenze tra le versioni
Contenuto cancellato Contenuto aggiunto
Riga 145:
*un PSI distinto contiente il PSI utilizzato nel routing
*un PSI con wildcard rappresena una collezione di PSI
==Descrizione delle interfacce==
{| class="wikitable"
!Nome Interfaccia
!Funzione IMS
!Descrizione
!Protocollo
|-
|
Cr
|
MRFC, AS
|
Used by MRFC to fetch documents (scripts and other resources) from an AS
|
[[Hypertext Transfer Protocol|HTTP]] over dedicated [[Transmission Control Protocol|TCP]]/[[Stream Control Transmission Protocol|SCTP]] channels
|-
|
Cx
|
I-CSCF, S-CSCF, HSS
|
Used to communicate between I-CSCF/S-CSCF and HSS
|
[[Diameter]]
|-
|
Dh
|
AS (SIP AS, OSA, IM-SSF) <-> SLF
|
Used by AS to find a correct HSS in a multi-HSS environment.DH_SLF_QUERY indicates a IMPU and DX_SLF_RESP return the HSS name.
|
[[Diameter]]
|-
|
Dx
|
(I-CSCF or S-CSCF) <-> SLF
|
Used by I-CSCF or S-CSCF to find a correct HSS in a multi-HSS environment. DX_SLF_QUERY indicates a IMPU and DX_SLF_RESP return the HSS name.
|
[[Diameter]]
|-
|
Gm
|
UE, P-CSCF
|
Used to exchange messages between UE and P-CSCF
|
[[Session Initiation Protocol|SIP]]
|-
|
Go
|
PDF, GGSN
|
Allows operators to control QoS in a user plane and exchange charging correlation information between IMS and GPRS network
|
[[Common Open Policy Service|COPS]] (Rel5), [[Diameter]] (Rel6+)
|-
|
Gq
|
P-CSCF, PDF
|
Used to exchange policy decisions-related information between P-CSCF and PDF
|
[[Diameter]]
|-
|
ISC
|
S-CSCF, AS
|
Reference point between S-CSCF and AS. Main functions are to :
*Notify the AS of the registered IMPU, registration state and UE capabilities
*Supply the AS with information to allow it to execute multiple services
*Convey charging information
|
[[Session Initiation Protocol|SIP]]
|-
|
Ici
|
IBCFs
|
Used to exchange messages between an IBCF and another IBCF belonging to a different IMS network.
|
|-
|
Ma
|
I-CSCF <-> AS
|
Main functions are to:
*Forward SIP requests which are destinated to a Public Service Identity hosted by the AS
*Originate a session on behalf of a user or Public Service Identity, if the AS has no knowledge of a S-CSCF assigned to that user or Public Service Identity
*Convey charging information
|
[[Session Initiation Protocol|SIP]]
|-
|
Mg
|
MGCF -> I,S-CSCF
|
MGCF converts [[ISDN User Part|ISUP]] signalling to [[Session Initiation Protocol|SIP]] signalling and forwards [[Session Initiation Protocol|SIP]] signalling to I-CSCF
|
[[Session Initiation Protocol|SIP]]
|-
|
Mi
|
S-CSCF -> BGCF
|
Used to exchange messages between S-CSCF and BGCF
|
[[Session Initiation Protocol|SIP]]
|-
|
Mj
|
BGCF -> MGCF
|
Used for the interworking with the PSTN/CS Domain, when the BGCF has determined that a breakout should occur in the same IMS network to send SIP message from BGCF to MGCF
|
[[Session Initiation Protocol|SIP]]
|-
|
Mk
|
BGCF -> BGCF
|
Used for the interworking with the PSTN/CS Domain, when the BGCF has determined that a breakout should occur in another IMS network to send SIP message from BGCF to the BGCF in the other network
|
[[Session Initiation Protocol|SIP]]
|-
|
Mm
|
I-CSCF, S-CSCF, external IP network
|
Used for exchanging messages between IMS and external IP networks
|
[[Session Initiation Protocol|SIP]]
|-
|
Mn
|
MGCF, IM-MGW
|
Allows control of user-plane resources
|
[[Megaco|H.248]]
|-
|
Mp
|
MRFC, MRFP
|
Allows an MRFC to control media stream resources provided by an MRFP.
|
[[Megaco|H.248]]
|-
|
Mr
|
S-CSCF, MRFC
|
Used to exchange messages between S-CSCF and MRFC
|
[[Session Initiation Protocol|SIP]]
|-
|
Mx
|
BGCF/CSCF, IBCF
|
Used for the interworking with another IMS network, when the BGCF has determined that a breakout should occur in the other IMS network to send SIP message from BGCF to the IBCF in the other network
|
[[Session Initiation Protocol|SIP]]
|-
|
Mw
|
P-CSCF, I-CSCF, S-CSCF
|
Used to exchange messages between CSCFs
|[[Session Initiation Protocol|SIP]]
|-
|
Rf
|
P-CSCF, I-CSCF, S-CSCF, BGCF, MRFC, MGCF, AS
|
Used to exchange offline charging information with CCF
|
[[Diameter]]
|-
|
Ro
|
AS, MRFC, S-CSCF
|
Used to exchange online charging information with ECF
|
[[Diameter]]
|-
|
Rx
|
P-CSCF, PCRF
|
Used to exchange policy and charging related information between P-CSCF and PCRF (Policy and Charging Rule Function)
Replacement for the Gq reference point.
|
[[Diameter]]
|-
|
Sh
|
AS (SIP AS, OSA SCS), HSS
|
Used to exchange information between an AS (SIP AS or OSA SCS) and HSS. Main functions are to:
*Transfer user related data, group lists from the HSS
*Activate/deactivate filter criteria stored in the HSS on a per subscriber basis
|
[[Diameter]]
|-
|
Si
|
IM-SSF, HSS
|
Transports CAMEL subscription information including triggers for use by CAMEL based application services information.
|
[[Mobile Application Part|MAP]]
|-
|
Sr
|
MRFC, AS
|
Used by MRFC to fetch documents (scripts and other resources) from an AS
|
[[Hypertext Transfer Protocol|HTTP]]
|-
|
Ut
|
UE, AS (SIP AS, OSA SCS, IM-SSF)
|
Facilitates the management of subscriber information related to services and settings
|
[[Hypertext Transfer Protocol|HTTP]](s), [[XCAP]]
|}
==Tecnologie alternative==
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