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+..    Copyright (c) 2019-2020 Intel
+..
+..  Licensed under the Apache License, Version 2.0 (the "License");
+..  you may not use this file except in compliance with the License.
+..  You may obtain a copy of the License at
+..
+..      http://www.apache.org/licenses/LICENSE-2.0
+..
+..  Unless required by applicable law or agreed to in writing, software
+..  distributed under the License is distributed on an "AS IS" BASIS,
+..  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+..  See the License for the specific language governing permissions and
+..  limitations under the License.
+
+.. |br| raw:: html
+
+   <br /> 
+   
+Wls Lib Installation Guide
+==========================
+
+The wls library uses DPDK as the basis for the shared memory operations and requires that DPDK 
+be installed in the system since in the makefile it uses the RTE_SDK environment variable when
+building the library. |br|
+The current release was tested using DPDK version 18.08 but it doesn't preclude the 
+use of newer releases. |br|
+Also the library uses the Intel Compiler that is defined as part of the ODULOW documentation.
+
+Contents
+--------
+
+- Overview
+- Building and Installation
+- Command Line Parameters
+- Known Issues/Troubleshooting
+- License
+
+
+================================================================================
+
+Overview
+--------
+
+This document describes the wls DPDK base library for ODULOW to ODUHIGH
+communication as part of the |br|
+ORAN Reference Architecture where an intermediate
+shin layer can be present between these components.
+
+
+================================================================================
+
+
+Building and Installation
+-------------------------
+
+Retrieve the source files from the Linux Foundation Gerrit server:
+    `<https://gerrit.o-ran-sc.org/r/gitweb?p=o-du%2Fphy.git;a=summary>`_
+
+1. cd wls_lib
+2. wls_lib$ ./build.sh xclean
+3. wls_lib$ ./build.sh
+
+The shared library is available at wls_lib/lib
+
+This library is used by the ODUHIGH, shin layer implementing a 5G FAPI to IAPI translator and the 
+ODULOW components.
+
+Please define an environment variable DIR_WIRELESS_WLS with the path to the root folder of
+the wls_lib as it is needed for the fapi_5g build process.
+
+Unit Test building and validation
+---------------------------------
+
+In order to build the unit test do the following steps:
+
+1. cd test
+2. ./build.sh xclean
+3. ./build.sh
+4. Create an SSH session into the target an change directory to wls_lib/bin/phy
+5. issue ./phy.sh
+6. Create a second SSH session into the target and change directory to wls_lib/bin/fapi
+7. issue ./fapi.sh
+8. Create a third SSH session into the target and change directory to wls_lib/bin/mac
+9. issue ./mac.sh
+
+After the test run you should see that each module sent and receive 16 messages from
+the display status messages.
+
+================================================================================
+
+
+
+Known Issues/Troubleshooting
+----------------------------
+No known issues.
+For troubleshooting use unit test application.
+
+================================================================================
+
+License
+-------
+
+Please see License.txt at the root of the phy repository for license information details
+
+