Real-time Transport Control Protocol

E127658

control protocol network protocol

Real-time Transport Control Protocol (RTCP) is a companion protocol to RTP that provides out-of-band control, quality-of-service feedback, and synchronization for real-time audio and video streams over IP networks.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
RTCP	4
RTP Control Protocol	1
Real-time Transport Control Protocol canonical	1
SRTCP	1
Secure RTCP	1

How this entity was disambiguated

This entity first appeared as the object of triple T1096762 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Real-time Transport Control Protocol
Context triple: [Secure Real-time Transport Protocol, secures, Real-time Transport Control Protocol]

A. SRTP for secure media transport
SRTP for secure media transport is a security protocol that encrypts and authenticates real-time audio and video streams, commonly used in VoIP and WebRTC communications.
B. Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
C. IEEE 802.1Qat stream reservation protocol standard
The IEEE 802.1Qat stream reservation protocol standard defines mechanisms for reserving network resources to support time-sensitive audio and video streams with guaranteed quality of service over Ethernet networks.
D. Time-Sensitive Networking (TSN) standards
Time-Sensitive Networking (TSN) standards are a set of IEEE Ethernet extensions that provide deterministic, low-latency, and highly reliable communication for real-time and mission-critical applications in industries such as automotive, industrial automation, and audio/video.
E. IEEE 802.1Qav forwarding and queuing for time‑sensitive streams standard
The IEEE 802.1Qav forwarding and queuing for time‑sensitive streams standard defines mechanisms for prioritized traffic shaping and scheduling in Ethernet networks to support low-latency, time-critical data delivery.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Real-time Transport Control Protocol
Target entity description: Real-time Transport Control Protocol (RTCP) is a companion protocol to RTP that provides out-of-band control, quality-of-service feedback, and synchronization for real-time audio and video streams over IP networks.

A. SRTP for secure media transport
SRTP for secure media transport is a security protocol that encrypts and authenticates real-time audio and video streams, commonly used in VoIP and WebRTC communications.
B. Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
C. IEEE 802.1Qat stream reservation protocol standard
The IEEE 802.1Qat stream reservation protocol standard defines mechanisms for reserving network resources to support time-sensitive audio and video streams with guaranteed quality of service over Ethernet networks.
D. Time-Sensitive Networking (TSN) standards
Time-Sensitive Networking (TSN) standards are a set of IEEE Ethernet extensions that provide deterministic, low-latency, and highly reliable communication for real-time and mission-critical applications in industries such as automotive, industrial automation, and audio/video.
E. IEEE 802.1Qav forwarding and queuing for time‑sensitive streams standard
The IEEE 802.1Qav forwarding and queuing for time‑sensitive streams standard defines mechanisms for prioritized traffic shaping and scheduling in Ethernet networks to support low-latency, time-critical data delivery.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	control protocol ⓘ network protocol ⓘ
abbreviation	RTCP ⓘ linked to: Real-time Transport Control Protocol
bandwidthUsage	typically limited to 5% of session bandwidth ⓘ
category	Internet protocol ⓘ streaming media protocol ⓘ
companionProtocolOf	RTP ⓘ Real-time Transport Protocol ⓘ linked to: RFC 3550
definedIn	RFC 3550 ⓘ
designGoal	low control overhead ⓘ scalability to large multicast groups ⓘ
layer	application layer ⓘ
operatesOver	IP ⓘ UDP ⓘ
packetType	APP ⓘ Application-Defined ⓘ BYE ⓘ Goodbye ⓘ Receiver Report ⓘ SDES ⓘ Sender Report ⓘ Source Description ⓘ
partOf	RTP/RTCP protocol suite ⓘ linked to: RTP
predecessorRFC	RFC 1889 ⓘ
provides	QoS monitoring ⓘ media stream synchronization ⓘ out-of-band control ⓘ quality-of-service feedback ⓘ receiver reporting ⓘ sender reporting ⓘ session control information ⓘ
securityExtension	SRTCP ⓘ linked to: SRTP for secure media transport
standardizedBy	IETF ⓘ linked to: Internet Engineering Task Force
supportsFunction	jitter estimation ⓘ media synchronization using NTP and RTP timestamps ⓘ packet loss reporting ⓘ participant identification via CNAME ⓘ round-trip time estimation ⓘ sender clock reporting ⓘ session membership management ⓘ
supportsTopology	multicast ⓘ unicast ⓘ
usedFor	IPTV ⓘ VoIP ⓘ WebRTC media control ⓘ multimedia conferencing ⓘ real-time audio streaming ⓘ real-time video streaming ⓘ
usedWith	SRTP ⓘ linked to: SRTP for secure media transport Secure Real-time Transport Protocol ⓘ linked to: SRTP for secure media transport
usesPortRange	dynamic UDP ports ⓘ
usesPortRelationship	typically RTP port + 1 ⓘ

How these facts were elicited

Referenced by (8)

Full triples — surface form annotated when it differs from this entity's canonical label.

Secure Real-time Transport Protocol → secures → Real-time Transport Control Protocol ⓘ

subject linked to: SRTP for secure media transport

ORTC → transportProtocol → RTCP ⓘ