MCData-FD‑1 reference point is used for MCData application signalling for establishing a session in support of MCData file distribution. The bearer is also used for both uplink and downlink unicast data (e.g., URL associated to file, file download completed report). The
MCData-FD‑1 reference point shall use the
SIP‑1 and
SIP‑2 reference points for transport and routing of SIP signalling.
MCData-FD‑1 reference point can be used as long as the file size does not exceed the capabilities (e.g. payload or transmission limits) provided by
MCData-FD‑1.
Messages supported on this interface include the uplink and the downlink unicast file transaction between the MCData clients in MCData communication via the MCData server for:
-
metadata (file size, type etc.) of the file being distributed;
-
URL of the file being distributed;
-
sending download completed report;
-
small size file;
-
conversation identifier for message thread indication; and
-
application plane identities for the MCData user and MCData application.
Messages supported on this interface may also include the MCData client providing the MCData server with
-
MCData application signalling for establishing a file distribution session in support of MCData communication.
6.6.4.1.2 Reference point MCData-FD-2 (unicast between the FD functions of the MCData client and the MCData server) Word‑p. 36
The
MCData-FD‑2 reference point, which exists between the FD functions of the MCData client and the MCData server, is used for unicast file transaction between MCData server and MCData client. The
MCData-FD‑2 reference point uses the SGi reference point defined in
TS 23.002.
Reference point
MCData-FD‑2 supports the following functions:
-
file being distributed from and to the MCData client;
-
conversation identifier for message thread indication; and
-
application plane identities for the MCData user and MCData application.
The
MCData-FD‑3 reference point, which exists between the FD functions of the MCData client and the MCData server, is used by the FD function of the MCData server to send downlink multicast file data to the FD function of the MCData client. The
MCData-FD‑3 reference point uses the
MB2‑U interface defined in
TS 23.468 or the
xMB‑U interface as defined in
TS 26.348.
The MCData-FD‑4 reference point, which exists between the media storage function and the media storage client, is used by the media storage client of MCData UE to upload and download file to the media storage function of the MCData content server. The MCData-FD‑4 reference point uses the HTTP reference point.
The MCData-FD‑5 reference point, which exists between FD function and the media storage function, is used by the FD function of MCData server to fetch the file in the MCData content server that was uploaded by the media storage client of a MCData UE for multicast delivery using MBMS. It also supports necessary operational functions such as size check for transmission control etc. The MCData-FD‑5 reference point uses the HTTP reference point.
The MCData-FD‑7 reference point, which exists between media storage function and the MCData message store, is used by the media storage function to fetch the file residing in the MCData message store and store in its repository for distribution. It is also used by the MCData message store to download the file contents from the media storage function.