diff -r 0c70949a5006 src/common/sequence.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/common/sequence.cc	Mon Nov 23 15:21:09 2009 +0100
@@ -0,0 +1,85 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 University of Applied Sciences Rapperswil, Switzerland (HSR)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author:  Fabian Mauchle <fabian.mauchle@hsr.ch>
+ */
+
+#include "sequence.h"
+#include "ns3/test.h"
+#include "ns3/assert.h"
+
+//all functions are implemented in the header
+
+//--sequence test
+
+namespace ns3
+{
+
+class SequenceTest : public TestCase
+{
+public:
+  SequenceTest () : TestCase ("Check sequence mathematical correctness"){}
+  virtual bool DoRun (void)
+  {
+    sequence32_t testValues[][2] = {
+        {1,2},
+        {-1,0},
+        {0,0xefffffff},
+        {0xefffffff,-1},
+        {0xf0000000,0},
+        {1,0xf0000000}
+    };
+
+    for(int i = 0; i < 2; i++)
+      {
+        sequence32_t    a = testValues[i][0],
+                        b = testValues[i][1];
+
+        NS_TEST_ASSERT_MSG_EQ((bool)(a < b), true, "a < b");
+
+        NS_TEST_ASSERT_MSG_EQ((bool)(a > b), (bool)(b < a), "fail");
+        NS_TEST_ASSERT_MSG_EQ((bool)(a < b), (bool)(b > a), "fail");
+        NS_TEST_ASSERT_MSG_EQ((bool)(a <= b), (bool)(b >= a), "fail");
+        NS_TEST_ASSERT_MSG_EQ((bool)(a >= b), (bool)(b <= a), "fail");
+        NS_TEST_ASSERT_MSG_NE((bool)(a >= b), (bool)(a < b), "fail");
+        NS_TEST_ASSERT_MSG_NE((bool)(a <= b), (bool)(a > b), "fail");
+
+
+      }
+
+    sequence32_t x = 10, y = 10;
+    NS_TEST_ASSERT_MSG_EQ((bool)(x <= y), true, "x <= y");
+    NS_TEST_ASSERT_MSG_EQ((bool)(x >= y), true, "x <= y");
+    NS_TEST_ASSERT_MSG_EQ((bool)(x == y), true, "x <= y");
+
+    return GetErrorStatus ();
+  }
+};
+
+
+
+class SequenceTestSuite : public TestSuite
+{
+public:
+  SequenceTestSuite () : TestSuite ("sequence-test", UNIT)
+  {
+    AddTestCase (new SequenceTest);
+  }
+} sequenceTestSuite;
+
+}
+
diff -r 0c70949a5006 src/common/sequence.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/common/sequence.h	Mon Nov 23 15:21:09 2009 +0100
@@ -0,0 +1,107 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 University of Applied Sciences Rapperswil, Switzerland (HSR)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author:  Fabian Mauchle <fabian.mauchle@hsr.ch>
+ */
+
+#ifndef SEQUENCE_H
+#define SEQUENCE_H
+
+#include <stdint.h>
+
+/**
+ * \breif generic sequence number
+ *
+ * LessOrEqualThan is defined as the compared number itself and the preceding
+ * 2^(n-1) -1 numbers in the finite field of 2^n
+ *
+ * GreaterThan is defined as the proceding 2^(n-1) numbers in the finite field
+ * of 2^n
+ *
+ */
+
+template <typename T>
+class Sequence
+{
+public:
+  Sequence () : seq(0) {}
+  Sequence (const T s) : seq (s) { }
+  operator T () const { return seq;}
+  Sequence& operator= (const T s) { seq = s; return *this;}
+  Sequence& operator+= (const T s) { seq += s; return *this;}
+  Sequence  operator++ ()              { seq++; return *this;}
+  Sequence  operator++ (int)           { Sequence ss (seq); seq++; return ss;}
+  Sequence& operator-= (const T s) { seq -= s; return *this;}
+  Sequence  operator-- ()              { seq--; return *this;}
+  Sequence  operator-- (int)           { Sequence ss (seq); seq--; return ss;}
+
+  T seq;
+};
+
+template <typename T>
+bool operator<= (Sequence<T> a, Sequence<T> b)
+{
+  return (b - a) < (((Sequence<T>)(-1))>>1);
+}
+
+template <typename T>
+bool operator>= (Sequence<T> a, Sequence<T> b)
+{
+  return b <= a;
+}
+
+template <typename T>
+bool operator< (Sequence<T> a, Sequence<T> b)
+{
+  return ! (a >= b);
+}
+
+template <typename T>
+bool operator> (Sequence<T> a, Sequence<T> b)
+{
+  return b < a;
+}
+
+template <typename T>
+Sequence<T>  operator+ (const Sequence<T> l, const Sequence<T> r)
+{
+  return Sequence<T> (l.seq + r.seq);
+}
+
+template <typename T>
+Sequence<T>  operator+ (const Sequence<T> l, const T r)
+{
+  return Sequence<T> (l.seq + r);
+}
+
+template <typename T>
+Sequence<T>  operator- (const Sequence<T> l, const Sequence<T> r)
+{
+  return Sequence<T> (l.seq - r.seq);
+}
+
+template <typename T>
+Sequence<T>  operator- (const Sequence<T> l, const T r)
+{
+  return Sequence<T> (l.seq - r);
+}
+
+typedef Sequence<uint32_t> sequence32_t;
+typedef Sequence<uint16_t> sequence16_t;
+typedef Sequence<uint8_t> sequence8_t;
+
+#endif /* sequence_H_ */
diff -r 0c70949a5006 src/common/wscript
--- a/src/common/wscript	Sun Nov 22 18:27:14 2009 +0000
+++ b/src/common/wscript	Mon Nov 23 15:21:09 2009 +0100
@@ -21,6 +21,7 @@
         'ascii-writer.cc',
         'pcap-file.cc',
         'pcap-file-test-suite.cc',
+        'sequence.cc',
         ]
 
     headers = bld.new_task_gen('ns3header')
@@ -43,4 +44,5 @@
         'ascii-writer.h',
         'sgi-hashmap.h',
         'pcap-file.h',
+        'sequence.h',
         ]