Update DFC documentation

Change-Id: I95befc4a6b597f67672797d44561de41af9c480d
Signed-off-by: Chengkai Yan <martin.c.yan@est.tech>
Issue-ID: DCAEGEN2-876

1 files changed, 31 insertions, 0 deletions

diff --git a/docs/sections/services/dfc/architecture.rst b/docs/sections/services/dfc/architecture.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+Architecture
+============
+
+Introduction
+""""""""""""
+DataFile Collector (DFC) is a part of DCAEGEN2. Some information about DFC and the reasons of its implementation can be found here: `5G bulk PM wiki page`_.
+
+.. _5G bulk PM wiki page: https://wiki.onap.org/display/DW/5G+-+Bulk+PM
+
+DFC will handle the collection of bulk PM data flow:
+    1. Subscribes to fileReady DMaaP topic
+    2. Collects the file from the xNF
+    3. Sends new event to DataRouter with file.
+
+
+DFC is delivered as one **Docker container** which hosts application server and can be started by `docker-compose`.
+See `Delivery`_ for more information about the docker container.
+
+.. _Delivery: ./delivery.html
+
+Functionality
+"""""""""""""
+.. image:: ../../images/DFC.png
+
+Interaction
+"""""""""""
+DFC will interact with the DMaaP Message Router and with the Data Router via secured protocol, using json files.
+So far, the implemented protocols are sftp and ftp(e)s.