ns-3.24: src/contrib/delay-jitter-estimation.cc@363c7065ce0e (annotated)

2265 190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	1
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	2	#include "delay-jitter-estimation.h"
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	3	#include "ns3/tag.h"
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	4	#include "ns3/simulator.h"
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	5
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	6	namespace {
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	7
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	8	class TimestampTag : public ns3::Tag
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	9	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	10	public:
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	11	TimestampTag ();
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	12	static uint32_t GetUid (void);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	13	void Print (std::ostream &os) const;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	14	void Serialize (ns3::Buffer::Iterator start) const;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	15	uint32_t Deserialize (ns3::Buffer::Iterator start);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	16	uint32_t GetSerializedSize (void) const;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	17
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	18	ns3::Time GetTxTime (void) const;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	19	private:
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	20	uint64_t m_creationTime;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	21	};
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	22
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	23	TimestampTag::TimestampTag ()
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	24	: m_creationTime (ns3::Simulator::Now ().GetTimeStep ())
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	25	{}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	26	uint32_t
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	27	TimestampTag::GetUid (void)
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	28	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	29	static uint32_t uid = ns3::Tag::AllocateUid<TimestampTag> ("mathieu.paper.TimestampTag");
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	30	return uid;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	31	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	32	void
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	33	TimestampTag::Print (std::ostream &os) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	34	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	35	os << ns3::TimeStep (m_creationTime);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	36	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	37	void
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	38	TimestampTag::Serialize (ns3::Buffer::Iterator start) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	39	{}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	40	uint32_t
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	41	TimestampTag::Deserialize (ns3::Buffer::Iterator start)
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	42	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	43	return 0;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	44	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	45	uint32_t
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	46	TimestampTag::GetSerializedSize (void) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	47	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	48	return 0;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	49	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	50	ns3::Time
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	51	TimestampTag::GetTxTime (void) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	52	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	53	return ns3::TimeStep (m_creationTime);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	54	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	55
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	56	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	57
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	58	namespace ns3 {
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	59
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	60	DelayJitterEstimation::DelayJitterEstimation ()
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	61	: m_previousRx (Simulator::Now ()),
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	62	m_previousRxTx (Simulator::Now ()),
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	63	m_jitter (Seconds (0.0)),
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	64	m_delay (Seconds (0.0))
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	65	{}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	66	void
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	67	DelayJitterEstimation::PrepareTx (Ptr<const Packet> packet)
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	68	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	69	TimestampTag tag;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	70	packet->AddTag (tag);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	71	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	72	void
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	73	DelayJitterEstimation::RecordRx (Ptr<const Packet> packet)
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	74	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	75	TimestampTag tag;
2281 1e9dd91f666f fix optimized build Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2265 diff changeset	76	bool found;
1e9dd91f666f fix optimized build Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2265 diff changeset	77	found = packet->PeekTag (tag);
2287 363c7065ce0e it is possible to receive packets which are not tagged. ignore them rather than crash. Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2281 diff changeset	78	if (!found)
363c7065ce0e it is possible to receive packets which are not tagged. ignore them rather than crash. Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2281 diff changeset	79	{
363c7065ce0e it is possible to receive packets which are not tagged. ignore them rather than crash. Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2281 diff changeset	80	return;
363c7065ce0e it is possible to receive packets which are not tagged. ignore them rather than crash. Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: 2281 diff changeset	81	}
2265 190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	82	tag.GetTxTime ();
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	83
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	84	Time delta = (Simulator::Now () - m_previousRx) - (tag.GetTxTime () - m_previousRxTx);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	85	m_jitter += (Abs (delta) - m_jitter ) / Scalar (16.0);
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	86	m_previousRx = Simulator::Now ();
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	87	m_previousRxTx = tag.GetTxTime ();
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	88	m_delay = Simulator::Now () - tag.GetTxTime ();
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	89	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	90
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	91	Time
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	92	DelayJitterEstimation::GetLastDelay (void) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	93	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	94	return m_delay;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	95	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	96	Time
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	97	DelayJitterEstimation::GetLastJitter (void) const
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	98	{
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	99	return m_jitter;
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	100	}
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	101
190a2d913472 estimation delay and jitter Mathieu Lacage <mathieu.lacage@sophia.inria.fr> parents: diff changeset	102	} // namespace ns3

author	Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
	Wed, 19 Dec 2007 13:24:30 +0100
changeset 2287	363c7065ce0e
parent 2281	1e9dd91f666f
child 3038	5962e2962fa9
permissions	-rw-r--r--