From 276119f2d54b2e8f49b8595ecfcc6545aeb77fef Mon Sep 17 00:00:00 2001
From: "Varma, Vikas" <vv8305@att.com>
Date: Wed, 19 Sep 2018 00:39:03 -0400
Subject: Initial checkin for pci optimization code

Change-Id: I6fe8ad471f8ad68a964664b910f02bd8a9766639
Signed-off-by: Varma, Vikas <vv8305@att.com>
Issue-ID: OPTFRA-342
---
 osdf/optimizers/pciopt/solver/optimizer.py | 82 ++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 osdf/optimizers/pciopt/solver/optimizer.py

(limited to 'osdf/optimizers/pciopt/solver/optimizer.py')

diff --git a/osdf/optimizers/pciopt/solver/optimizer.py b/osdf/optimizers/pciopt/solver/optimizer.py
new file mode 100644
index 0000000..e9fcb0d
--- /dev/null
+++ b/osdf/optimizers/pciopt/solver/optimizer.py
@@ -0,0 +1,82 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2018 AT&T Intellectual Property
+#
+#   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.
+#
+# -------------------------------------------------------------------------
+#
+
+import itertools
+
+import os
+import pymzn
+
+from osdf.logging.osdf_logging import debug_log
+from .pci_utils import get_id
+
+BASE_DIR = os.path.dirname(__file__)
+MZN_FILE_NAME = os.path.join(BASE_DIR, 'no_conflicts_no_confusion.mzn')
+
+
+def pci_optimize(cell_id, network_cell_info, cell_info_list):
+    debug_log.debug("Cell ID {} ".format(cell_id))
+    dzn_data = {}
+    dzn_data['NUM_NODES'] = len(cell_info_list)
+    dzn_data['NUM_PCIS'] = len(cell_info_list)
+
+    conflict_edges = get_conflict_edges(cell_id, network_cell_info)
+
+    dzn_data['NUM_CONFLICT_EDGES'] = len(conflict_edges)
+    dzn_data['CONFLICT_EDGES'] = conflict_edges
+
+    confusion_edges = get_confusion_edges(cell_id, network_cell_info)
+
+    dzn_data['NUM_CONFUSION_EDGES'] = len(confusion_edges)
+    dzn_data['CONFUSION_EDGES'] = confusion_edges
+
+    return solve(dzn_data)
+
+def solve(dzn_data):
+    return pymzn.minizinc(MZN_FILE_NAME, data=dzn_data)
+
+
+def get_conflict_edges(cell_id, network_cell_info):
+    conflict_edges = []
+    for cell in network_cell_info['cell_list']:
+
+        if cell_id == cell['cell_id']:
+            add_to_conflict_edges(network_cell_info, cell, conflict_edges)
+    return conflict_edges
+
+
+def add_to_conflict_edges(network_cell_info, cell, conflict_edges):
+    cell_id = cell['cell_id']
+    for nbr in cell.get('nbr_list', []):
+        conflict_edges.append([get_id(network_cell_info, cell_id), get_id(network_cell_info, nbr['cellId'])])
+
+
+
+def get_confusion_edges(cell_id, network_cell_info):
+    confusion_edges = []
+    for cell in network_cell_info['cell_list']:
+        if cell_id == cell['cell_id']:
+            return add_to_confusion_edges(network_cell_info, cell)
+    return confusion_edges
+
+
+def add_to_confusion_edges(network_cell_info, cell):
+    cell_id = cell['cell_id']
+    nbr_list = []
+    for nbr in cell.get('nbr_list', []):
+        nbr_list.append(get_id(network_cell_info, nbr['cellId']))
+    return [list(elem) for elem in list(itertools.combinations(nbr_list, 2))]
-- 
cgit 1.2.3-korg