Page 795 - Cloud computing: From paradigm to operation
P. 795

Video processing and storage                                       4


            Figure 7-7 shows the procedural flows of the media acquisition from the cloud storage system to the CU:
            (1)     The CU initiates a media acquisition request and sends this request to the SCU.

            (2)     The SCU forwards this acquisition request to the CMU.
            (3)     The CMU authenticates the acquisition access permission and then sends this request to the CSMU.
            (4)     The CSMU authenticates the acquisition access permission and then sends this request to the CSAU.
            (5)     The CSAU returns a response to the CSMU when it is ready for this media acquisition request.
            (6)     The CSMU returns the CSAU information to the CMU.
            (7)     The CMU sends a response to the SCU.
            (8)     The SCU forwards this response to the CU.
            (9)     When the CU receives the response, it sends a media acquisition request to the CSAU.
            (10)    The CSAU transfers this request to the CSDU.
            (11)    After  receiving  this  request,  the  CSDU  creates  a  media  channel  with  the  CSAU  to  transmit  the
                    required media data.
            (12)    The CSAU transfers the media data to the CU.
            (13)    When the CU stops the media acquisition, it sends a stop request to the CSAU.
            (14)    The CSAU transfers this request to the CSDU.
            (15)    The CSDU returns a response to the CSAU.
            (16)    The CSAU requests the SCU to disconnect.
            (17)    The SCU returns a response to end this media acquisition operation.





















































                                                                                                         787
   790   791   792   793   794   795   796   797   798   799   800