A1 PMS support for fine grained access control -A1 London

Documentation updates.

Issue-ID: CCSDK-3889
Signed-off-by: PatrikBuhr <patrik.buhr@est.tech>
Change-Id: Iaa73d0128a4c466ed2b3d1803af66368d3c37fa6

1 files changed, 13 insertions, 3 deletions

diff --git a/docs/architecture/architecture.rst b/docs/architecture/architecture.rst
index a9facd53..edb9d346 100755
--- a/docs/architecture/architecture.rst
+++ b/docs/architecture/architecture.rst
@@ -11,9 +11,9 @@ Introduction
 ************
 
 
-The CCSDK ORAN components add support for handling "A1 Policies" as defined for the O-RAN A1 interface.
+The CCSDK ORAN components add support for handling "A1 Policies" as defined for the O-RAN A1-P interface.
 
-The O-RAN A1 interface is defined by the `O-RAN Alliance <https://www.o-ran.org>`_
+The O-RAN A1-P interface is defined by the `O-RAN Alliance <https://www.o-ran.org>`_
 
 
 *******************
@@ -21,11 +21,21 @@ Architecture Review
 *******************
 
 This picture provides a overview of ONAP's A1 Controller architecture,
-integration with other ONAP components and API resource/operation provided.
+integration with other components and API resource/operation provided.
 
 .. image:: ../media/ONAP-A1ControllerArchitecture.png
    :width: 500pt
 
+The A1 Policy Management Service provides an API for accessing of A1 Policies. The PMS
+configures these in the traffical elements (NearRT-RICS). It also keeps a backup of these in case of restart of PMS.
+On regular basis, it will check that the configured A1 Policices are consistent with the actual ones in the NearRT-RICS (and take action if not).
+ 
+The access to the NearRT-RIC may be tunneled through an A1 adapter in the CCSDK/SDNC controller.
+
+The A1 PMS provides support for fine granied access control, which is implemented by delegating the granting of access of A1 Policies to an external
+authorization provider.
+
+More details can be found in :ref:`developer_guide`.
 
 ***************
 Developer Guide