RTCP - Real-Time Control Protocol
====================================

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              **What is RTCP?**

                RTCP, or Real-Time Control Protocol, is a companion protocol to RTP, standardized by the IETF. It is used to monitor
                transmission statistics and Quality of Service in real-time media streaming and conferencing applications.

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              **Why RTCP is Useful?**

                * Provides feedback on media delivery quality.
                * Supports synchronization between audio and video streams.
                * Enables participant identification and session controls.
                * Helps in network diagnostics and performance tuning.
                * Facilitates adaptive streaming decisions based on real-time metrics.

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              **How it works?**

                * RTP transmits media - Audio/video packets are sent using RTP.
                * RTCP packets are sent periodically - Clients and servers exchange control packets.
                * Reports are generated - RTCP includes sender and receiver reports with metrics.
                * Synchronization info is shared - RTCP helps align audio and video streams.
                * Session info is updated - RTCP includes source descriptions and participant data.

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              **Where is RTCP used?**

                * VoIP and video calls - Skype, Zoom, WhatsApp use RTCP for quality monitoring.
                * Streaming platforms - RTCP helps optimize delivery in live and on-demand services.
                * Video conferencing systems - RTCP supports multi-party session management.
                * WebRTC applications - RTCP is integral to browser-based real-time communication.
                * Surveillance and IP cameras - RTCP ensures reliable and synchronized video feeds.

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              **Which OSI Layer Does RTCP Belong To?**

                RTCP operates at the **Application Layer (Layer 7)** of the OSI model because:

                * It provides control and feedback functions for RTP media streams, which are application-level tasks.
                * Uses UDP as the transport protocol but manages session-level concerns like QoS, synchronization, and participant information.
                * Facilitates real-time monitoring and adaptation, directly serving multimedia applications.

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        Topics in this section,

                * :ref:`Learnings in this section <RTCP_step1>`

                * :ref:`Terminology <RTCP_step2>`

                * :ref:`Version Info <RTCP_step3>`

                * :ref:`RTCP Version&RFC Details <RTCP_step5>`

                * :ref:`RTCP Basic Setup on Ubuntu using IPv4 <RTCP_step24>`
                  
                * :ref:`RTCP Basic Setup on Ubuntu using IPv6 <RTCP_step25>`
                  
                * :ref:`RTCP Protocol Packet Details <RTCP_step6>`

                * :ref:`RTCP Usecases <RTCP_step7>`

                * :ref:`RTCP Basic Features <RTCP_step8>`
                    
                * :ref:`RTCP Feature : Quality Feedback <RTCP_step9>` 

                * :ref:`RTCP Feature : Synchronization Support <RTCP_step10>`

                * :ref:`RTCP Feature : Sender and Receiver Reports <RTCP_step11>`  

                * :ref:`RTCP Feature : Source Description <RTCP_step12>`  

                * :ref:`RTCP Feature : Session Control <RTCP_step13>`

                * :ref:`RTCP Feature : Scalability <RTCP_step14>`

                * :ref:`RTCP Feature : Low Overhead <RTCP_step15>`   

                * :ref:`RTCP Feature : Congestion Control <RTCP_step16>` 

                * :ref:`RTCP Feature : Extensibility <RTCP_step17>` 

                * :ref:`RTCP Feature : Security Support <RTCP_step18>`

                * :ref:`RTCP Feature : Interoperability <RTCP_step19>`

                * :ref:`RTCP Feature : Multicast and Unicast Support <RTCP_step20>`

                * :ref:`RTCP Feature : Periodic Reporting <RTCP_step21>`

                * :ref:`RTCP Feature : Codec and Media Adaptation <RTCP_step22>`

                * :ref:`RTCP Feature : Application-Level Integration <RTCP_step23>`

                * :ref:`Reference links <RTCP_step26>`


.. _RTCP_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _RTCP_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _RTCP_step3:

.. tab-set::

    .. tab-item:: Version Info
    
         * Version Info

                

.. _RTCP_step5:

.. tab-set::

    .. tab-item:: RTCP Version&RFC Details

        
         .. csv-table:: 
               :file: ./RTCP/RTCP_RFC_Details.csv
               :widths: 10,10,10,30,40
               :header-rows: 1

.. _RTCP_step24:

.. tab-set::

    .. tab-item:: RTCP Basic Setup on Ubuntu using IPv4

       * Setup

 



.. _RTCP_step25:

.. tab-set::

   .. tab-item:: RTCP Basic Setup on Ubuntu using IPv6
   
      * Setup



.. _RTCP_step6:

.. tab-set::

    .. tab-item:: RTCP Protocol Packet Details
       
         **Sender Report Packet**

         .. csv-table:: 
                :file: ./RTCP/RTCP_Protocol_Packet_1.csv
                :widths: 10,20,30,10
                :header-rows: 1

         **Receiver Report Packet**

         .. csv-table:: 
                :file: ./RTCP/RTCP_Protocol_Packet_2.csv
                :widths: 10,20,30,10
                :header-rows: 1

         **Source Description Packet**

         .. csv-table::
                :file: ./RTCP/RTCP_Protocol_Packet_3.csv
                :widths: 10,20,30,10
                :header-rows: 1

         **Goodbye Packet**

         .. csv-table:: 
                :file: ./RTCP/RTCP_Protocol_Packet_4.csv
                :widths: 10,20,30,10
                :header-rows: 1
        
         **Application-Defined Packet**

         .. csv-table::
                :file: ./RTCP/RTCP_Protocol_Packet_5.csv
                :widths: 10,20,30,10
                :header-rows: 1


.. _RTCP_step7:

.. tab-set::

    .. tab-item:: RTCP Usecases
        
        
         .. csv-table:: 
               :file: ./RTCP/RTCP_Usecases.csv
               :widths: 10,20,30
               :header-rows: 1

.. _RTCP_step8:

.. tab-set::

    .. tab-item:: RTCP Basic Features
    
         
         .. csv-table:: 
                  :file: ./RTCP/RTCP_Features.csv
                  :widths: 10,10,30
                  :header-rows: 1

.. _RTCP_step9:

.. tab-set::

    .. tab-item:: RTCP Feature : Quality Feedback

          **Quality Feedback - Testcases**

          .. csv-table:: 
                 :file: ./RTCP/RTCP_Feature-1_Quality_Feedback_Testcase.csv
                 :widths: 10,10,30,20
                 :header-rows: 1


   
.. _RTCP_step10:

.. tab-set::

    .. tab-item:: RTCP Feature : Synchronization Support

         **Synchronization Support - Testcases**

         .. csv-table:: 
                :file: ./RTCP/RTCP_Feature-2_Synchronization_Support_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1


.. _RTCP_step11:

.. tab-set::

    .. tab-item:: RTCP Feature : Sender and Receiver Reports

        **Sender and Receiver Reports - Testcases**

        .. csv-table:: 
                 :file: ./RTCP/RTCP_Feature-3_Sender_And_Receiver_Reports_Testcase.csv
                 :widths: 10,10,30,20
                 :header-rows: 1


.. _RTCP_step12:

.. tab-set::

    .. tab-item:: RTCP Feature : Source Description 

        **Source Description - Testcases**

          .. csv-table:: 
                :file: ./RTCP/RTCP_Feature-4_Source_Description_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step13:

.. tab-set::

    .. tab-item:: RTCP Feature : Session Control

         **Session Control - Testcases**

         .. csv-table:: 
                 :file: ./RTCP/RTCP_Feature-5_Session_Control_Testcase.csv
                 :widths: 10,10,30,20
                 :header-rows: 1


 
.. _RTCP_step14:

.. tab-set::

    .. tab-item:: RTCP Feature : Scalability

         **Scalability - Testcases**

         .. csv-table:: 
                  :file: ./RTCP/RTCP_Feature-6_Scalability_Testcase.csv
                  :widths: 10,10,30,20
                  :header-rows: 1


.. _RTCP_step15:

.. tab-set::

    .. tab-item:: RTCP Feature : Low Overhead
   
          **Low Overhead - Testcases**

          .. csv-table:: 
                 :file: ./RTCP/RTCP_Feature-7_Low_Overhead_Testcase.csv
                 :widths: 10,10,30,20
                 :header-rows: 1


.. _RTCP_step16:

.. tab-set::

    .. tab-item:: RTCP Feature : Congestion Control

         **Congestion Control - Testcases**

         .. csv-table:: 
                 :file: ./RTCP/RTCP_Feature-8_Congestion_Control_Testcase.csv
                 :widths: 10,10,30,20
                 :header-rows: 1



.. _RTCP_step17:

.. tab-set::

    .. tab-item:: RTCP Feature : Extensibility

        **Extensibility - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-9_Extensibility_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step18:

.. tab-set::

    .. tab-item:: RTCP Feature : Security Support

        **Security Support - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-10_Security_Support_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step19:

.. tab-set::

    .. tab-item:: RTCP Feature : Interoperability

        **Interoperability - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-11_Interoperability_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step20:

.. tab-set::

    .. tab-item:: RTCP Feature : Multicast and Unicast Support

        **Multicast and Unicast Support - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-12_Multicast_and_Unicast_Support_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step21:

.. tab-set::

    .. tab-item:: RTCP Feature : Periodic Reporting

        **Periodic Reporting - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-13_Periodic_Reporting_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step22:

.. tab-set::

    .. tab-item:: RTCP Feature : Codec and Media Adaptation

        **Codec and Media Adaptation - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-14_Codec_And_Media_Adaptation_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step23:

.. tab-set::

    .. tab-item:: RTCP Feature : Application-Level Integration

        **Application-Level Integration - Testcases**

        .. csv-table::
                :file: ./RTCP/RTCP_Feature-15_Application-Level_Integration_Testcase.csv
                :widths: 10,10,30,20
                :header-rows: 1



.. _RTCP_step26:

.. tab-set::

    .. tab-item:: Reference links
     
       * Reference links