Added block for extracting assignment commands
diff --git a/grc/misc_utils/gsm_extract_assignment_cmd.xml b/grc/misc_utils/gsm_extract_assignment_cmd.xml
new file mode 100644
index 0000000..8562e56
--- /dev/null
+++ b/grc/misc_utils/gsm_extract_assignment_cmd.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<block>
+ <name>Extract Assignment Command</name>
+ <key>gsm_extract_assignment_cmd</key>
+ <import>import grgsm</import>
+ <make>grgsm.extract_assignment_cmd()</make>
+ <sink>
+ <name>msgs</name>
+ <type>message</type>
+ </sink>
+ <doc>
+Extracts Assignemnt Commands.
+
+Input: decoded control channel messages
+
+The information can be retrieved using following function:
+get_assignment_commands()
+
+</doc>
+</block>