Capabilities within main protocol

Extensions

22

integration of resource management and SIP?

[30] [64]

o

c14

23

grouping of media lines?

[53]

c3

c3

24

mapping of media streams to resource reservation flows?

[54]

o

c1

25

SDP bandwidth modifiers for RTCP bandwidth?

[56]

o

o (NOTE 1)

26

TCP-based media transport in the session description protocol?

[83]

o

c2

27

interactive connectivity establishment?

[289], [290]

o

c4

28

session description protocol format for binary floor control protocol streams?

[108]

o

o

29

extended RTP profile for real-time transport control protocol (RTCP)-based feedback (RTP/AVPF)?

[135]

o

c5

30

SDP capability negotiation?

[137]

o

c6

31

Session Description Protocol (SDP) extension for setting up audio media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN)?

[155]

o

c7

32

miscellaneous capabilities negotiation in the Session Description Protocol (SDP)?

[156]

o

c7

33

transport independent bandwidth modifier for the Session Description Protocol?

[152]

o

c8

34

Secure Real-time Transport Protocol (SRTP)?

[169]

o

c15

35

MIKEY-TICKET?

[170]

o

c10

36

SDES?

[168]

o

c9

37

end-to-access-edge media security using SDES?

7.5.2

n/a

c16

37A

end-to-access-edge media security for MSRP using TLS and certificate fingerprints?

7.5.2

n/a

c22

37B

end-to-access-edge media security for BFCP using TLS and certificate fingerprints?

7.5.2

n/a

c23

37C

end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints?

7.5.2

n/a

c24

37D

end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints?

7.5.2

n/a

c40

38

SDP media capabilities negotiation?

[172]

o

c12

39

Transcoding Services Invocation in the Session Initiation Protocol (SIP) Using Third Party Call Control (3pcc)?

[166]

o

c13

40

Message Session Relay Protocol?

[178]

o

c17

40A

Connection establishment for media anchoring for the message session relay protocol?

[214]

o

c26

41

a SDP offer/answer mechanism to enable file transfer?

[185]

o

o

42

optimal media routeing

[11D]

n/a

c18

43

ECN for RTP over UDP

[188]

o

c19

44

T.38 FAX?

[202]

n/a

c20

45

support for reduced-size RTCP?

[204]

o

o

46

RTCP extended reports?

[205]

o

o

47

maximum receive SDU size?

[9B]

o

o

48

the SDP content attribute?

[206]

o

c21

49

a general mechanism for RTP header extensions?

[210]

o

o

50

negotiation of generic image attributes in the session description protocol (SDP)?

[211]

o

o

51

connection-oriented media transport over the TLS protocol in the SDP?

[241]

o

c25

52

UDPTL over DTLS?

[217]

o

c27

53

telepresence?

[7G]

o

o

54

SCTP over DTLS?

[219]

o

c28

55

DTLS-SRTP?

[222], [223]

o

c41

56

STUN Usage for Consent Freshness?

[224]

o

c29

57

Alternate Connectivity (ALTC) Attribute?

[228]

o

c30

58

3GPP MTSI RTCP-APP adaptation?

[9B]

n/a

o

59

3GPP MTSI Pre-defined Region-of-Interest (ROI)?

[9B]

n/a

o

60

3GPP MTSI Arbitrary Region-of-Interest (ROI)?

[9B]

n/a

o

61

multiplexing RTP data and control packets on a single port

[237], [237A]

o

o

61A

Exclusive RTP and RTCP multiplexed on one port (a=rtcp-mux-only)?

[246]

o

c34

62

SDP-based data channel negotiation?

[238]

o

c31

63

Media plane optimization for WebRTC?

[8Z]

n/a

c32

64

Enhanced bandwidth negotiation mechanism?

[9B]

n/a

o

65

an SDP offer/answer mechanism to negotiate DTLS protected media?

[240]

o

c33

66

Using simulcast in SDP and RTP sessions?

[249]

o

c35

67

RTP payload format restrictions?

[250]

o

c36

68

Compact Concurrent Codec Negotiation and Capabilities?

[9B]

n/a

c35

69

3GPP MTSI Delay Budget Information (DBI)?

[9B]

n/a

c37

70

Access Network Bitrate Recommendation (ANBR)?

[9B]

n/a

c38

71

Framework for Live Uplink Streaming (FLUS)?

[276]

n/a

c39

72

3GPP MTSI client using data channels?

[9B]

n/a

c39

c1: IF A.3/1 THEN m ELSE n/a – – UE role.

c2: IF A.3/9B AND A.3/13B THEN m ELSE IF A.3/1 OR A.3/2A OR A.3/6 OR A.3/7 THEN o ELSE n/a – – IBCF (IMS-ALG), ISC gateway function (IMS-ALG), UE, P-CSCF (IMS-ALG), MGCF, AS.

c3: IF A.317/24 OR A.317/53 THEN m ELSE o – – mapping of media streams to resource reservation flows, telepresence.

c4: IF A.3/9B OR A.3/13B THEN m ELSE IF A.3/1 OR A.3/6 THEN o ELSE n/a – – IBCF (IMS-ALG), application gateway function (IMS-ALG), UE, MGCF.

c5: IF A.3A/50 OR A.3A/50A OR A.3/6 OR A.3/9B OR A.3A/89 OR A.3A/11 OR A.3A/12 THEN m ELSE o – – multimedia telephony service participant, multimedia telephony service application server, MGCF, IBCF (IMS-ALG), ATCF (UA), conference focus, conference participant.

c6: IF A.3A/50 OR A.3A/50A OR A.3/6 OR A.3/9B OR A.3/13B OR A.3A/89 THEN m ELSE o – – multimedia telephony service participant, multimedia telephony service application server, MGCF, IBCF (IMS-ALG), application gateway function (IMS-ALG), ATCF (UA).

c7: IF A.3A/82 OR A.3A/83 THEN m ELSE o – – ICS user agent, SCC application server.

c8: IF A.317/25 AND (A.3/1 OR A.3/6 OR A.3A/89) THEN o ELSE n/a – – SDP bandwidth modifiers for RTCP bandwidth, UE, MGCF, ATCF (UA).

c9: IF A.3D/30 OR A.3D/20 THEN m ELSE n/a – – end-to-access-edge media security using SDES, end-to-end media security using SDES.

c10: IF A.3D/21 OR A.3D/22 THEN m ELSE n/a – – end-to-end media security using KMS, end-to-end media security for MSRP using TLS and KMS.

c12: IF A.3A/82 OR A.3A/83 THEN m ELSE o – – ICS user agent, SCC application server.

c13: IF IF A.3/7D OR A.3/8 THEN o else n/a – – AS performing 3rd party call control or MRFC.

c14: IF A.4/2C THEN m ELSE o – – initiating a session which require local and/or remote resource reservation.

c15: IF A.3D/20 OR A.3D/21 OR A.3D/30 THEN m ELSE n/a – – end-to-end media security using SDES, end-to-end media security using KMS, end-to-access-edge media security using SDES.

c16: If A.3D/30 THEN m ELSE n/a – – end-to-access-edge media security using SDES.

c17: IF A.3A/33B OR A.3A/34 THEN m ELSE IF A.3A/8 OR A.3A/9 OR A.3/2A THEN o ELSE n/a – – session-mode messaging participant, session-mode messaging intermediate node, IBCF, MRFC, P-CSCF (IMS-ALG).

c18: IF A.3/2A OR A.3/6 OR A.3/7 OR A.3/9B OR A.3A/89 OR A.3/13B THEN o ELSE n/a – – P-CSCF (IMS-ALG), MGCF, AS, IBCF (IMS-ALG), ATCF (UA), application gateway function (IMS-ALG).

c19: IF A.3/2A OR A.3/6 OR A.3/8 OR A.3/9B OR A.3A/81 OR A.3A/89 OR A.3/13B OR A.3A/81A OR A.3A/81B THEN o ELSE n/a – – P-CSCF (IMS-ALG), MGCF, MRFC, IBCF (IMS-ALG), MSC Server enhanced for ICS, ATCF (UA), application gateway function (IMS-ALG), MSC server enhanced for SRVCC using SIP interface, MSC server enhanced for DRVCC using SIP interface.

c20: IF A.3/1 OR A.3/6 THEN o ELSE n/a – – UE, MGCF.

c21: IF A.3A/57 OR A.3A/58 OR A.3A/59 OR A.3A/60 OR A.3/2A OR A.3/9B OR A.3A/11 OR A.3A/12 THEN m ELSE o – – Customized alerting tones application server, Customized alerting tones UA client, Customized ringing signal application server, Customized ringing signal UA client, P-CSCF (IMS-ALG), IBCF (IMS-ALG), conference focus, conference participant.

c22: If A.3D/20A THEN m ELSE n/a – – end-to-access-edge media security for MSRP using TLS and certificate fingerprints.

c23: If A.3D/20B THEN m ELSE n/a – – end-to-access-edge media security for BFCP using TLS and certificate fingerprints.

c24: If A.3D/20C THEN m ELSE n/a – – end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints.

c25: IF (A.317/37A AND A.317/40) OR (A.317/37B AND A.317/28) OR (A.317/37C AND A.317/52) OR (A.317/37D AND A.317/55) THEN m ELSE o – – end-to-access-edge media security for MSRP using TLS and certificate fingerprints, message session relay protocol, end-to-access-edge media security for BFCP using TLS and certificate fingerprints, session description protocol format for binary floor control protocol streams, end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints, UDPTL over DTLS, end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints, DTLS-SRTP.

c26: IF A.317/40 THEN m ELSE n/a – – message session relay protocol.

c27: IF A.317/37C THEN m ELSE o – – end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints.

c28: IF (A.3/1 AND A.317/53) OR A.3/14 OR A.3A/95 THEN m ELSE o – – UE, telepresence, Gm based WIC, eP-CSCF.

c29: IF A.3/14 OR A.3A/95 THEN m ELSE o – – Gm based WIC, eP-CSCF.

c30: IF A.3A/81 OR A.3/9B OR A.3/2A THEN o ELSE n/a – – UE performing the functions of an external attached network, IBCF (IMS-ALG), P-CSCF (IMS-ALG).

c31: IF A.3/14 OR A.3A/95 THEN o ELSE n/a – – Gm based WIC, eP-CSCF.

c32: IF A.3A/95 OR A.3/9B THEN o ELSE n/a – – eP-CSCF, IMS-ALG.

c33: IF A.317/52 OR A.317/54 OR A.317/55 THEN m ELSE n/a – – UDPTL over DTLS, SCTP over DTLS, DTLS-SRTP.

c34: IF A.3/14 OR A.3A/95 THEN m ELSE n/a – – Gm based WIC, eP-CSCF.

c35: IF A.3A/11 OR A.3A/12 THEN o ELSE n/a – – conference focus, conference participant.

c36: IF A.317/66 AND (A.3A/11 OR A.3A/12) THEN o ELSE n/a – – Using simulcast in SDP and RTP sessions, conference focus, conference participant.

c37: IF A.3/1 OR A.3/2A OR A.3/8 OR A.3/9B THEN o ELSE n/a – – UE, P-CSCF (IMS-ALG), MRFC, IBCF (IMS-ALG).

c38: IF A.3/1 THEN o ELSE n/a – – UE.

c39: IF A.3/1 OR A.3/2 THEN o ELSE n/a – – UE, P-CSCF.

c40: IF A.3D/31 THEN m ELSE n/a – – end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints.

c41: IF A.3D/31 THEN m ELSE o – – end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints.

NOTE 1: For "video" and "audio" media types that utilise RTP/RTCP, if the RTCP bandwidth level for the session is different than the default RTCP bandwidth as specified in RFC 3556 [56], then, it shall be specified. For other media types, it may be specified.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

Session level description

1

v= (protocol version)

[39] 5.1

m

m

[39] 5.1

m

m

2

o= (owner/creator and session identifier)

[39] 5.2

m

m

[39] 5.2

m

m

3

s= (session name)

[39] 5.3

m

m

[39] 5.3

m

m

4

i= (session information)

[39] 5.4

o

c2

[39] 5.4

m

c3

5

u= (URI of description)

[39] 5.5

o

c4

[39] 5.5

o

n/a

6

e= (email address)

[39] 5.6

o

c4

[39] 5.6

o

n/a

7

p= (phone number)

[39] 5.6

o

c4

[39] 5.6

o

n/a

8

c= (connection information)

[39] 5.7

c5

c5

[39] 5.7

m

m

9

b= (bandwidth information)

[39] 5.8

o

o

[39] 5.8

m

m

Time description (one or more per description)

10

t= (time the session is active)

[39] 5.9

m

m

[39] 5.9

m

m

11

r= (zero or more repeat times)

[39] 5.10

o

c4

[39] 5.10

o

n/a

Session level description (continued)

12

z= (time zone adjustments)

[39] 5.11

o

n/a

[39] 5.11

o

n/a

13

k= (encryption key)

[39] 5.12

x

x

[39] 5.12

n/a

n/a

14

a= (zero or more session attribute lines)

[39] 5.13

o

o

[39] 5.13

m

m

Media description (zero or more per description)

15

m= (media name and transport address)

[39] 5.14

m

m

[39] 5.14

m

m

16

i= (media title)

[39] 5.4

o

c2

[39] 5.4

o

c3

17

c= (connection information)

[39] 5.7

c1

c1

[39] 5.7

m

m

18

b= (bandwidth information)

[39] 5.8

o

o

[39] 5.8

m

m

19

k= (encryption key)

[39] 5.12

x

x

[39] 5.12

n/a

n/a

20

a= (zero or more media attribute lines)

[39] 5.13

o

o

[39] 5.13

m

m

c1: IF (A.318/15 AND NOT A.318/8) THEN m ELSE IF (A.318/15 AND A.318/8) THEN o ELSE n/a – – "c=" contained in session level description and SDP contains media descriptions.

c2: IF A.3/6 THEN x ELSE o – – MGCF.

c3: IF A.3/6 THEN n/a ELSE m – – MGCF.

c4: IF A.3/6 THEN x ELSE n/a – – MGCF.

c5: IF A.318/17 THEN o ELSE m – – "c=" contained in all media description.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

1

category (a=cat)

[39] 6

c8

c8

[39] 6

c9

c9

2

keywords (a=keywds)

[39] 6

c8

c8

[39] 6

c9

c9

3

name and version of tool (a=tool)

[39] 6

c8

c8

[39] 6

c9

c9

4

packet time (a=ptime)

[39] 6

c10

c10

[39] 6

c11

c11

5

maximum packet time (a=maxptime)

[39] 6 (NOTE 1)

c10

c10

[39] 6 (NOTE 1)

c11

c11

6

receive-only mode (a=recvonly)

[39] 6

o

o

[39] 6

m

m

7

send and receive mode (a=sendrecv)

[39] 6

o

o

[39] 6

m

m

8

send-only mode (a=sendonly)

[39] 6

o

o

[39] 6

m

m

8A

Inactive mode (a=inactive)

[39] 6

o

o

[39] 6

m

m

9

whiteboard orientation (a=orient)

[39] 6

c10

c10

[39] 6

c11

c11

10

conference type (a=type)

[39] 6

c8

c8

[39] 6

c9

c9

11

character set (a=charset)

[39] 6

c8

c8

[39] 6

c9

c9

12

language tag (a=sdplang)

[39] 6

o

o

[39] 6

m

m

13

language tag (a=lang)

[39] 6

o

o

[39] 6

m

m

14

frame rate (a=framerate)

[39] 6

c10

c10

[39] 6

c11

c11

15

quality (a=quality)

[39] 6

c10

c10

[39] 6

c11

c11

16

format specific parameters (a=fmtp)

[39] 6

c10

c10

[39] 6

c11

c11

17

rtpmap attribute (a=rtpmap)

[39] 6

c10

c10

[39] 6

c11

c11

18

current-status attribute (a=curr)

[30] 5

c1

c1

[30] 5

c2

c2

19

desired-status attribute (a=des)

[30] 5

c1

c1

[30] 5

c2

c2

20

confirm-status attribute (a=conf)

[30] 5

c1

c1

[30] 5

c2

c2

21

media stream identification attribute (a=mid)

[53] 3

c3

c3

[53] 3

c4

c4

22

group attribute (a=group)

[53] 4

c5

c5

[53] 3

c6

c6

23

setup attribute (a=setup)

[83] 4

c7

c45

[83] 4

c7

c45

24

connection attribute (a=connection)

[83] 5

c7

c7

[83] 5

c7

c7

24A

DTLS association ID attribute (a=tls-id)

[240] 4

c62

c62

[240] 4

c62

c62

25

IP addresses (a=candidate)

[290]

c12

c12

[290]

c13

c13

26

floor control server determination (a=floorctrl)

[108] 4

c14

c14

[108] 4

c14

c14

27

conference id (a=confid)

[108] 5

c14

c14

[108] 5

c14

c14

28

user id (a=userid)

[108] 5

c14

c14

[108] 5

c14

c14

29

association between streams and floors (a=floorid)

[108] 6

c14

c14

[108] 6

c14

c14

30

RTCP feedback capability attribute (a=rtcp-fb)

[135] 4.2

c15

c15

[135] 4.2

c15

c15

31

extension of the rtcp-fb attribute (a=rtcp-fb)

[136] 7.1, [188] 6.2, [251] 9

c15

c15

[136] 7.1, [251] 9

c15

c15

32

supported capability negotiation extensions (a=csup)

[137] 3.3.1

c16

c16

[137] 3.3.1

c16

c16

33

required capability negotiation extensions (a=creq)

[137] 3.3.2

c16

c16

[137] 3.3.2

c16

c16

34

attribute capability (a=acap)

[137] 3.4.1

c16

c16

[137] 3.4.1

c16

c16

35

transport protocol capability (a=tcap)

[137] 3.4.2

c16

c16

[137] 3.4.2

c16

c16

36

potential configuration (a=pcfg)

[137] 3.5.1

[172] 3.3.6

c16

c16

[137] 3.5.1

[172] 3.3.6

c16

c16

37

actual configuration (a=acfg)

[137] 3.5.2

c16

c16

[137] 3.5.2

c16

c16

38

connection data capability (a=ccap)

[156] 3.1

c17

c17

[156] 3.1

c18

c18

39

maximum packet rate (a=maxprate)

[152] 6.3

c19

c19

[152] 6.3

c19

c19

40

crypto attribute (a=crypto)

[168]

c20

c20

[168]

c20

c20

41

key management attribute (a=key-mgmt)

[167]

c21

c21

[167]

c21

c21

42

3GPP_e2ae-security-indicator (a=3ge2ae)

7.5.2

c22

c22

7.5.2

c22

c22

43

media capability (a=rmcap)

[172] 3.3.1

c23

c23

[172] 3.3.1

c23

c23

43A

media capability (a=omcap)

[172] 3.3.1

c23

c23

[172] 3.3.1

c23

c23

44

media format capability (a=mfcap)

[172] 3.3.2

c23

c23

[172] 3.3.2

c23

c23

45

media-specific capability (a=mscap)

[172] 3.3.3

c23

c23

[172] 3.3.3

c23

c23

46

latent configuration (a=lcfg)

[172] 3.3.5

c44

c44

[172] 3.3.5

c44

c44

47

session capability (a=sescap)

[172] 3.3.8

c24

c24

[172] 3.3.8

c24

c24

48

msrp path (a=path)

[178]

c25

c25

[178]

c25

c25

49

file selector (a=file-selector)

[185] 6

c27

c27

[185] 6

c28

c28

50

file transfer identifier (a= file-transfer-id)

[185] 6

c26

c26

[185] 6

c28

c28

51

file disposition (a=file-disposition)

[185] 6

c26

c26

[185] 6

c28

c28

52

file date (a=file-date)

[185] 6

c26

c26

[185] 6

c28

c28

53

file icon (a=file-icon

[185] 6

c26

c26

[185] 6

c28

c28

54

file range (a=file-range)

[185] 6

c26

c26

[185] 6

c28

c28

55

optimal media routeing visited realm (a=visited-realm)

7.5.3

c29

c29

7.5.3

c29

c29

56

optimal media routeing secondary realm (a=secondary-realm)

7.5.3

c29

c29

7.5.3

c29

c29

57

optimal media routeing media level checksum (a=omr-m-cksum)

7.5.3

c29

c29

7.5.3

c29

c29

58

optimal media routeing session level checksum (a=omr-s-cksum)

7.5.3

c29

c29

7.5.3

c29

c29

59

optimal media routeing codecs (a=omr-codecs)

7.5.3

c29

c29

7.5.3

c29

c29

60

optimal media routeing media attributes (a=omr-m-att)

7.5.3

c29

c29

7.5.3

c29

c29

61

optimal media routeing session attributes (a=omr-s-att)

7.5.3

c29

c29

7.5.3

c29

c29

62

optimal media routeing media bandwidth (a=omr-m-bw)

7.5.3

c29

c29

7.5.3

c29

c29

63

optimal media routeing session bandwidth (a=omr-s-bw)

7.5.3

c29

c29

7.5.3

c29

c29

64

ecn-attribute (a=ecn-capable-rtp)

[188]

c30

c30

[188]

c30

c30

65

T38 FAX Protocol version (a=T38FaxVersion)

[202]

n/a

c31

[202]

n/a

c31

66

T38 FAX Maximum Bit Rate (a=T38MaxBitRate)

[202]

n/a

c31

[202]

n/a

c31

67

T38 FAX Rate Management (a=T38FaxRateManagement)

[202]

n/a

c31

[202]

n/a

c31

68

T38 FAX Maximum Buffer Size (a=T38FaxMaxBuffer)

[202]

n/a

c31

[202]

n/a

c31

69

T38 FAX Maximum Datagram Size (a=T38FaxMaxDatagram)

[202]

n/a

c31

[202]

n/a

c31

70

T38 FAX maximum IFP frame size (a=T38FaxMaxIFP)

[202]

n/a

c32

[202]

n/a

c32

71

T38 FAX UDP Error Correction Scheme (a=T38FaxUdpEC)

[202]

n/a

c32

[202]

n/a

c32

72

T38 FAX UDP Error Correction Depth (a=T38FaxUdpECDepth)

[202]

n/a

c32

[202]

n/a

c32

73

T38 FAX UDP FEC Maximum Span (a=T38FaxUdpFECMaxSpan)

[202]

n/a

c32

[202]

n/a

c32

74

T38 FAX Modem Type (a=T38ModemType)

[202]

n/a

c32

[202]

n/a

c32

75

T38 FAX Vendor Info

(a=T38VendorInfo)

[202]

n/a

c32

[202]

n/a

c32

76

reduced-size RTCP (a=rtcp-rsize)

[204]

c33

c33

[204]

c34

c34

77

RTP control protocol extended report parameters (a=rtcp-xr)

[205]

c35

c35

[205]

c36

c36

78

maximum receive SDU size (a=3gpp_MaxRecvSDUSize)

[9B]

c37

c37

[9B]

c38

c38

79

content (a=content)

[206]

c39

c39

[206]

c39

c39

80

generic header extension map definition (a=extmap)

[210]

c40

c40

[210]

c41

c41

81

image attribute (a=imageattr)

[211]

c42

c42

[211]

c43

c43

82

fingerprint (a=fingerprint)

[241]

c46

c46

[241]

c46

c46

83

msrp-cema (a=msrp-cema)

[214]

c47

c47

[214]

c47

c47

84

sctp-port (a=sctp-port)

[219]

c48

c48

[219]

c48

c48

84A

max-message-size (a=max-message-size)

[219]

c68

c68

[219]

c48

c48

85

CS correlation (a=cs-correlation)

[155] 5.2.3.1

c49

c49

[155] 5.2.3.1

c49

c49

86

Alternate Connectivity (ALTC) Attribute (a=altc)

[228]

o

c50

[228]

o

c50

87

3GPP MTSI RTCP-APP adaptation (a=3gpp_mtsi_app_adapt)

[9B]

n/a

c51

[9B]

n/a

c52

88

3GPP MTSI Pre-defined Region-of-Interest (ROI)

(a=predefined_ROI)

[9B]

n/a

c53

[9B]

n/a

c54

89

RTP and RTCP multiplexed on one port (a=rtcp-mux)

[237], [237A]

c55

c55

[237], [237A]

c55

c55

90

data channel mapping (a=dcmap)

[238]

c56

c56

[238]

c56

c56

91

data channel subprotocol specific attributes (a=dcsa)

[238]

c55

c56

[238]

c56

c56

92

Media plane optimization for WebRTC Contact (a= tra-contact)

7.5.4

c57

c57

7.5.4

c57

c57

93

Media plane optimization for WebRTC m-line (a= tra-m-line)

7.5.4

c58

c58

7.5.4

c58

c58

94

Media plane optimization for WebRTC attribute (a= tra-att)

7.5.4

c57

c57

7.5.4

c57

c57

95

Media plane optimization for WebRTC bandwidth (a= tra-bw)

7.5.4

c57

c57

7.5.4

c57

c57

96

Media plane optimization for WebRTC SCTP-association (a= tra-SCTP-association)

7.5.4

c58

c58

7.5.4

c58

c58

97

Media plane optimization for WebRTC media line number (a= tra-media-line-number)

7.5.4

c59

c59

7.5.4

c59

c59

98

Enhanced bandwidth negotiation mechanism (a=bw-info)

[9B]

n/a

c60

[9B]

n/a

c61

99

Exclusive RTP and RTCP multiplexed on one port (a=rtcp-mux-only)

[246]

c63

c63

[246]

c63

c63

100

Simulcast stream description (a=simulcast)

[249] 6.1

c64

c64

[249] 6.1

c64

c64

101

Restriction identifier (a=rid)

[250] 10

c65

c65

[250] 10

c66

c66

102

3GPP compact concurrent codec capabilities (a=ccc-list)

[9B]

n/a

c67

[9B]

n/a

c67

103

Delay Budget Information (DBI) RTCP feedback type (a=rtcp-fb:* 3gpp-delay-budget)

[9B] 6.2.8

n/a

c69

[9B] 6.2.8

n/a

c69

104

ANBR Support attribute (a=anbr)

[9B]

n/a

c70

[9B]

n/a

c70

105

Label attribute (a=label)

[277] 4

o

c71

[277] 4

o

c71

106

3GPP QoS hint attribute (a=3gpp-qos-hint)

[9B] 6.2.7.4

n/a

c71

[9B] 6.2.7.4

n/a

c71

c1: IF A.317/22 AND A.318/20 THEN o ELSE n/a – – integration of resource management and SIP, media level attribute name "a=".

c2: IF A.317/22 AND A.318/20 THEN m ELSE n/a – – integration of resource management and SIP, media level attribute name "a=".

c3: IF A.317/23 AND A.318/20 THEN o ELSE n/a – – grouping of media lines, media level attribute name "a=".

c4: IF A.317/23 AND A.318/20 THEN m ELSE n/a – – grouping of media lines, media level attribute name "a=".

c5: IF A.317/23 AND A.318/14 THEN o ELSE n/a – – grouping of media lines, session level attribute name "a=".

c6: IF A.317/23 AND A.318/14 THEN m ELSE n/a – – grouping of media lines, session level attribute name "a=".

c7: IF A.317/26 AND A.318/20 THEN m ELSE n/a – – TCP-based media transport in the session description protocol, media level attribute name "a=".

c8: IF A.318/14 THEN o ELSE x – – session level attribute name "a=".

c9: IF A.318/14 THEN m ELSE n/a – – session level attribute name "a=".

c10: IF A.318/20 THEN o ELSE x – – media level attribute name "a=".

c11: IF A.318/20 THEN m ELSE n/a – – media level attribute name "a=".

c12: IF A.317/27 AND A.318/20 THEN o ELSE n/a – – candidate IP addresses, media level attribute name "a=".

c13: IF A.317/27 AND A.318/20 THEN m ELSE n/a – – candidate IP addresses, media level attribute name "a=".

c14: IF A.317/28 AND A.318/20 THEN m ELSE n/a – – session description protocol format for binary floor control protocol streams, media level attribute name "a=".

c15: IF (A.317/29 AND A.318/20) THEN m ELSE n/a – – extended RTP profile for real-time transport control protocol (RTCP)-based feedback (RTP/AVPF), media level attribute name "a=".

c16: IF A.317/30 AND A.318/20 THEN m ELSE n/a – – SDP capability negotiation, media level attribute name "a=".

c17: IF A.317/32 AND A.318/20 THEN o ELSE n/a – – miscellaneous capabilities negotiation in the Session Description Protocol (SDP), media level attribute name "a=".

c18: IF A.317/32 AND A.318/20 THEN m ELSE n/a – – miscellaneous capabilities negotiation in the Session Description Protocol (SDP), media level attribute name "a=".

c19: IF A.317/33 AND (A.318/14 OR A.318/20) THEN o ELSE n/a – – bandwidth modifier packet rate parameter, media or session level attribute name "a=".

c20: IF A.317/34 AND A.317/36 AND A.318/20 THEN m ELSE n/a – – Secure Real-time Transport Protocol, media plane security using SDES, media level attribute name "a=".

c21: IF ((A.317/34 AND A.3D/21) OR A.3D/22) AND A.317/35 AND A.318/20 THEN m ELSE n/a – – Secure Real-time Transport Protocol, end-to-end media security using KMS, end-to-end media security for MSRP using TLS and KMS, MIKEY-TICKET, media level attribute name "a=".

c22: IF (A.317/37 OR A.317/37A OR A.317/37B OR A.317/37C OR A.317/37D) AND A.318/20 THEN m ELSE n/a – – end-to-access edge media security using SDES, end-to-access-edge media security for MSRP using TLS and certificate fingerprints, end-to-access-edge media security for BFCP using TLS and certificate fingerprints, end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints, end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints, media level attribute name "a=".

c23: IF A.317/38 THEN m ELSE n/a – – SDP media capabilities negotiation.

c24: IF A.317/38 AND A.318/14 THEN m ELSE n/a – – SDP media capabilities negotiation, session level attribute name "a=".

c25: IF A.317/40 AND A.318/20 THEN m ELSE n/a – – message session relay protocol, media level attribute name "a=".

c26: IF A.317/41 AND A.318/20 THEN o ELSE n/a – – a SDP offer/answer mechanism to enable file transfer, media level attribute name "a=".

c27: IF A.317/41 AND A.318/20 AND (A.3A/31 OR A.3A/33) THEN m ELSE IF A.317/41 AND A.318/20 AND NOT (A.3A/31 OR A.3A/33) THEN o ELSE n/a – – a SDP offer/answer mechanism to enable file transfer, media level attribute name "a=", messaging application server, messaging participant.

c28: IF A.317/41 AND A.318/20 THEN m ELSE n/a – – a SDP offer/answer mechanism to enable file transfer, media level attribute name "a=".

c29: IF A.317/42 AND A.318/20 THEN o ELSE n/a – – optimal media routeing, media level attribute name "a=".

c30: IF A.317/43 THEN m ELSE n/a – – ECN for RTP over UDP, media level attribute name "a=".

c31: IF A.317/44 AND A.318/20 THEN m ELSE n/a – – T.38 FAX, media level attribute name "a=".

c32: IF A.317/44 AND A.318/20 THEN o ELSE n/a – – T.38 FAX, media level attribute name "a=".

c33: IF A.317/45 AND A.318/20 THEN o ELSE n/a – – support for reduced-size RTCP, media level attribute name "a=".

c34: IF A.317/45 AND A.318/20 THEN m ELSE n/a – – support for reduced-size RTCP, media level attribute name "a=".

c35: IF A.317/46 AND A.318/20 AND A.318/14 THEN o ELSE n/a – – RTCP extended reports, media level attribute name "a=", session level attribute name "a=".

c36: IF A.317/46 AND A.318/20 AND A.318/14 THEN m ELSE n/a – – RTCP extended reports, media level attribute name "a=", session level attribute name "a=".

c37: IF A.317/47 AND A.318/20 AND A.318/14 THEN o ELSE n/a – – maximum receive SDU size, media level attribute name "a=", session level attribute name "a=".

c38: IF A.317/47 AND A.318/20 AND A.318/14 THEN m ELSE n/a – – maximum receive SDU size, media level attribute name "a=", session level attribute name "a=".

c39: IF A.317/48 AND A.318/20 THEN m ELSE n/a – – the SDP content attribute, media level attribute name "a=".

c40: IF A.317/49 AND A.318/20 AND A.318/14 THEN o ELSE n/a – – a general mechanism for RTP header extensions, media level attribute name "a=", session level attribute name "a=".

c41: IF A.317/49 AND A.318/20 AND A.318/14 THEN m ELSE n/a – – a general mechanism for RTP header extensions, media level attribute name "a=", session level attribute name "a=".

c42: IF A.317/50 AND A.318/20 THEN o ELSE n/a – – negotiation of generic image attributes in the session description protocol (SDP), media level attribute name "a=".

c43: IF A.317/50 AND A.318/20 THEN m ELSE n/a – – negotiation of generic image attributes in the session description protocol (SDP), media level attribute name "a=".

c44: IF A.317/38 AND A.318/20 THEN m ELSE n/a – – SDP media capabilities negotiation, media level attribute name "a=".

c45: IF (A.317/26 OR A.317/52) AND A.318/20 THEN m ELSE n/a – – TCP-based media transport in the session description protocol, UDPTL over DTLS, media level attribute name "a=".

c46: IF (A.317/51 OR A.317/55) AND A.318/20 AND A.318/14 THEN m ELSE n/a – – connection-oriented media transport over the TLS protocol in the SDP, DTLS-SRTP, media level attribute name "a=", session level attribute name "a=".

c47: IF A.317/40A AND A.318/20 THEN m ELSE n/a – – connection establishment for media anchoring for the message session relay protocol, media level attribute name "a=".

c48: IF A.317/54 AND A.318/20 THEN m ELSE n/a – – SCTP over DTLS, media level attribute name "a=".

c49: IF A.317/31 AND A.318/20 THEN m ELSE n/a – – Session Description Protocol (SDP) extension for setting up audio media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN) and SIP, media level attribute name "a=".

c50: IF A.317/57 AND A.318/20 THEN o ELSE n/a – – Alternate Connectivity (ALTC) Attribute, media level attribute name "a="

c51: IF A.317/58 AND A.318/20 THEN o ELSE n/a – – 3GPP MTSI RTCP-APP adaptation, media level attribute name "a=".

c52: IF A.317/58 AND A.318/20 THEN m ELSE n/a – – 3GPP MTSI RTCP-APP adaptation, media level attribute name "a=".

c53: IF A.317/59 AND A.318/20 THEN o ELSE n/a – – 3GPP MTSI Pre-defined Region-of-Interest (ROI), media level attribute name "a=".

c54: IF A.317/59 AND A.318/20 THEN m ELSE n/a – – 3GPP MTSI Pre-defined Region-of-Interest (ROI), media level attribute name "a=".

c55: IF A.317/61 AND A.318/20 THEN m ELSE n/a – – multiplexing RTP data and control packets on a single port, media level attribute name "a=".

c56: IF A.317/62 AND A.318/20 THEN m ELSE n/a – – SDP-based data channel negotiation, media level attribute name "a=".

c57: IF A.317/63 AND (A.318/14 OR A.318/20) THEN o ELSE n/a – -, Media plane optimization for WebRTC session or media level attribute name "a=".

c58: IF A.317/63 AND A.318/20 THEN o ELSE n/a – -, Media plane optimization for WebRTC media level attribute name "a=".

c59: IF A.317/63 AND A.318/14 THEN o ELSE n/a – -, Media plane optimization for WebRTC session level attribute name "a=".

c60: IF A.317/64 AND A.318/20 THEN o ELSE n/a – – Enhanced bandwidth negotiation mechanism, media level attribute name "a=".

c61: IF A.317/64 AND A.318/20 THEN m ELSE n/a – – Enhanced bandwidth negotiation mechanism, media level attribute name "a=".

c62: IF (A.317/52 OR A.317/54 OR A.317/55) AND A.318/20 THEN m ELSE n/a – – UDPTL over DTLS, SCTP over DTLS, DTLS-SRTP, media level attribute name "a=".

c63: IF A.317/61A AND A.318/20 THEN m ELSE n/a – – Exclusive RTP and RTCP multiplexed on one port (a=rtcp-mux-only), media level attribute name "a=".

c64: IF A.317/66 AND A.318/20 THEN m ELSE n/a – – Using simulcast in SDP and RTP sessions, media level attribute name "a=".

c65: IF A.317/67 AND A.318/20 THEN o ELSE n/a – – RTP payload format restrictions, media level attribute name "a=".

c66: IF A.317/67 AND A.318/20 THEN m ELSE n/a – – RTP payload format restrictions, media level attribute name "a=".

c67: IF A.317/68 AND A.318/14 THEN o ELSE n/a – – Compact Concurrent Codec Negotiation and Capabilities, session level attribute name "a=".

c68: IF A.317/54 AND A.318/20 THEN o ELSE n/a – – SCTP over DTLS, media level attribute name "a=".

c69: IF A.317/69 AND A.318/20 THEN m ELSE n/a – – Delay Budget Information (DBI), media level attribute name "a=".

c70: IF A.317/70 AND A.318/20 THEN m ELSE n/a – – Access Network Bitrate Recommendation (ANBR), media level attribute name "a=".

c71: IF (A.317/71 OR A.317/72) AND A.318/20 THEN o ELSE n/a – – Framework for Live Uplink Streaming (FLUS), 3GPP MTSI client using data channels, media level attribute name "a=".

NOTE 1: Further specification of the usage of this attribute is defined by specifications relating to individual codecs.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

1

coordination of video orientation (urn:3gpp:video-orientation)

[9B]

n/a

o

[9B]

n/a

o

2

higher granularity coordination of video orientation (urn:3gpp:video-orientation:6)

[9B]

n/a

c1

[9B]

n/a

c1

3

video region-of-interest predefined-roi-sent (urn:3gpp: predefined-roi-sent)

[9B]

n/a

c2

[9B]

n/a

c2

4

video region-of-interest arbitrary-roi-sent (urn:3gpp:roi-sent)

[9B]

n/a

c3

[9B]

n/a

c3

c1: IF A.319A/1 THEN o ELSE n/a – – coordination of video orientation.

c2: IF A.317/59 THEN o ELSE n/a – – 3GPP MTSI Pre-defined Region-of-Interest (ROI).

c3: IF A.317/60 THEN o ELSE n/a – – 3GPP MTSI Arbitrary Region-of-Interest (ROI).

Capabilities within main protocol

0A

application of session policy?

6.2, 6.3

x

c2

Extensions

1

integration of resource management and SIP?

[30] [64]

o

n/a

2

grouping of media lines?

[53]

c3

x

3

mapping of media streams to resource reservation flows?

[54]

o

x

4

SDP bandwidth modifiers for RTCP bandwidth?

[56]

o

c1

5

TCP-based media transport in the session description protocol?

[83]

o

c11

6

interactive connectivity establishment?

[289], [290]

o

c4

7

session description protocol format for binary floor control protocol streams?

[108]

o

o

8

extended RTP profile for real-time transport control protocol (RTCP)-based feedback (RTP/AVPF)?

[135]

o

c5

9

SDP capability negotiation?

[137]

o

c9

10

Session Description Protocol (SDP) extension for setting up audio media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN)?

[155]

o

c6

11

miscellaneous capabilities negotiation in the Session Description Protocol (SDP)?

[156]

o

c6

14

Secure Real-time Transport Protocol (SRTP)?

[169]

o

o

15

MIKEY-TICKET?

[170]

o

o

16

SDES?

[168]

o

o

17

end-to-access edge media security using SDES?

7.5.2

n/a

n/a

17A

end-to-access-edge media security for MSRP using TLS and certificate fingerprints?

7.5.2

n/a

n/a

17B

end-to-access-edge media security for BFCP using TLS and certificate fingerprints?

7.5.2

n/a

n/a

17C

end-to-access-edge media security for UDPTL using DTLS and certificate fingerprints?

7.5.2

n/a

n/a

17D

end-to-access-edge media security for RTP media using DTLS-SRTP and certificate fingerprints?

7.5.2

n/a

n/a

18

SDP media capabilities negotiation?

[172]

o

c8

19

Transcoding Services Invocation in the Session Initiation Protocol (SIP) Using Third Party Call Control (3pcc)?

[166]

m

i

20

Message Session Relay Protocol?

[178]

o

o

20A

Connection establishment for media anchoring for the message session relay protocol?

[214]

o

c12

21

a SDP offer/answer mechanism to enable file transfer?

[185]

o

o

22

optimal media routeing?

[11D]

n/a

o

23

ECN for RTP over UDP?

[188]

o

c10

24

T.38 FAX?

[202]

n/a

o

25

support for reduced-size RTCP?

[204]

o

o

26

RTCP extended reports?

[205]

o

o

27

maximum receive SDU size?

[9B]

o

o

28

the SDP content attribute

[206]

o

o

29

a general mechanism for RTP header extensions?

[210]

o

o

30

negotiation of generic image attributes in the session description protocol (SDP)?

[211]

o

o

31

connection-oriented media transport over the TLS protocol in the SDP?

[241]

o

o

32

UDPTL over DTLS?

[217]

o

o

33

telepresence?

[7G]

o

o

34

SCTP over DTLS?

[219]

o

o

35

DTLS-SRTP?

[222], [223]

o

o

36

STUN Usage for Consent Freshness?

[224]

o

o

38

3GPP MTSI RTCP-APP adaptation?

[9B]

n/a

o

39

3GPP MTSI Pre-defined Region of Interest (ROI)?

[9B]

n/a

o

40

3GPP MTSI Arbitrary Region-of-Interest (ROI)?

[9B]

n/a

o

41

multiplexing RTP data and control packets on a single port

[237], [237A]

o

o

42

Media plane optimization for WebRTC

7.5.4

n/a

o

43

Enhanced bandwidth negotiation mechanism

[9B]

n/a

o

45

an SDP offer/answer mechanism to negotiate DTLS protected media?

[240]

o

c13

46

Using simulcast in SDP and RTP sessions?

[249]

o

o

47

RTP payload format restrictions?

[250]

o

o

48

Compact Concurrent Codec Negotiation and Capabilities?

[9B]

n/a

o

49

3GPP MTSI Delay Budget Information (DBI)?

[9B]

n/a

c14

50

Access Network Bitrate Recommendation (ANBR)?

[9B]

n/a

c15

51

Framework for Live Uplink Streaming (FLUS)?

[276]

n/a

c15

52

3GPP MTSI client using data channels?

[9B]

n/a

c15

c1: IF A.3/2 OR A.3A/88 THEN m ELSE n/a – – P-CSCF, ATCF (proxy).

c2: IF A.3/2 OR A.3/4 THEN o ELSE x – P-CSCF, S-CSCF.

c3: IF A.328/3 THEN m ELSE o – – mapping of media streams to resource reservation flows.

c4: IF A.3/2 OR A.3/4 THEN m ELSE n/a – – P-CSCF, S-CSCF.

c5: IF (A.3A/50A AND A.3/7C) OR A.3/2 OR A.3/4 OR A.3A/88 THEN m ELSE n/a – – multimedia telephony service application server as AS acting as a SIP proxy, P-CSCF, S-CSCF, ATCF (proxy).

c6: IF (A.3A/83 AND A.3/7C) OR A.3/4 THEN m ELSE IF A.3A/88 THEN i ELSE n/a – – SCC application server, AS acting as a SIP proxy, S-CSCF, ATCF (proxy).

c7: IF A.328/18 THEN m ELSE o – – SDP media capabilities negotiation.

c8: IF A.3/2 OR A.3/4 THEN m ELSE IF A.3A/88 THEN i ELSE o – – P-CSCF, S-CSCF, ATCF (proxy).

c9: IF (A.3A/50A AND A.3/7C) OR A.3/2 OR A.3/4 OR A.328/18 OR A.3A/88 THEN m ELSE n/a – – multimedia telephony service application server as AS acting as a SIP proxy, P-CSCF, S-CSCF, SDP media capabilities negotiation, ATCF (proxy).

c10: IF A.3A/88 THEN o ELSE i – – ATCF (proxy).

c11: IF A.3/2 OR A.3/4 OR A.3A/88 THEN m ELSE n/a – – P-CSCF, S-CSCF, ATCF (proxy).

c12: IF A.328/20 THEN m ELSE n/a – – message session relay protocol.

c13: IF A.328/32 OR A.328/34 OR A.328/35 THEN m ELSE n/a – – UDPTL over DTLS, SCTP over DTLS, DTLS-SRTP.

c14: IF A.3/2 OR A.3/4 THEN o ELSE n/a – – P-CSCF, S-CSCF.

c15: If A.3/2 THEN o ELSE n/a – – P-CSCF.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

Session level description

1

v= (protocol version)

[39] 5.1

m

m

[39] 5.1

m

m

2

o= (owner/creator and session identifier).

[39] 5.2

m

m

[39] 5.2

i

i

3

s= (session name)

[39] 5.3

m

m

[39] 5.3

i

i

4

i= (session information)

[39] 5.4

m

m

[39] 5.4

i

i

5

u= (URI of description)

[39] 5.5

m

m

[39] 5.5

i

i

6

e= (email address)

[39] 5.6

m

m

[39] 5.6

i

i

7

p= (phone number)

[39] 5.6

m

m

[39] 5.6

i

i

8

c= (connection information)

[39] 5.7

m

m

[39] 5.7

i

i

9

b= (bandwidth information)

[39] 5.8

m

m

[39] 5.8

i

i

Time description (one or more per description)

10

t= (time the session is active)

[39] 5.9

m

m

[39] 5.9

i

i

11

r= (zero or more repeat times)

[39] 5.10

m

m

[39] 5.10

i

i

Session level description (continued)

12

z= (time zone adjustments)

[39] 5.11

m

m

[39] 5.11

i

i

13

k= (encryption key)

[39] 5.12

m

m

[39] 5.12

i

i

14

a= (zero or more session attribute lines)

[39] 5.13

m

m

[39] 5.13

i

i

Media description (zero or more per description)

15

m= (media name and transport address)

[39] 5.14

m

m

[39] 5.14

m

m

16

i= (media title)

[39] 5.4

m

m

[39] 5.4

i

i

17

c= (connection information)

[39] 5.7

m

m

[39] 5.7

i

i

18

b= (bandwidth information)

[39] 5.8

m

m

[39] 5.8

i

c1

19

k= (encryption key)

[39] 5.12

m

m

[39] 5.12

i

i

20

a= (zero or more media attribute lines)

[39] 5.13

m

m

[39] 5.13

i

c1

c1: IF A.328/0A THEN m ELSE i – – application of session policy.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

1

category (a=cat)

[39] 6

m

m

[39] 6

i

i

2

keywords (a=keywds)

[39] 6

m

m

[39] 6

i

i

3

name and version of tool (a=tool)

[39] 6

m

m

[39] 6

i

i

4

packet time (a=ptime)

[39] 6

m

m

[39] 6

i

c9

5

maximum packet time (a=maxptime)

[39] 6 (NOTE 1)

m

m

[39] 6 (NOTE 1)

i

c9

6

receive-only mode (a=recvonly)

[39] 6

m

m

[39] 6

i

c9

7

send and receive mode (a=sendrecv)

[39] 6

m

m

[39] 6

i

c9

8

send-only mode (a=sendonly)

[39] 6

m

m

[39] 6

i

c9

8A

Inactive mode (a=inactive)

[39] 6

m

m

[39] 6

i

c9

9

whiteboard orientation (a=orient)

[39] 6

m

m

[39] 6

i

c9

10

conference type (a=type)

[39] 6

m

m

[39] 6

i

i

11

character set (a=charset)

[39] 6

m

m

[39] 6

i

i

12

language tag (a=sdplang)

[39] 6

m

m

[39] 6

i

c9

13

language tag (a=lang)

[39] 6

m

m

[39] 6

i

c9

14

frame rate (a=framerate)

[39] 6

m

m

[39] 6

i

c9

15

quality (a=quality)

[39] 6

m

m

[39] 6

i

c9

16

format specific parameters (a=fmtp)

[39] 6

m

m

[39] 6

i

c9

17

rtpmap attribute (a=rtpmap)

[39] 6

m

m

[39] 6

i

c9

18

current-status attribute (a=curr)

[30] 5

m

m

[30] 5

c2

c2

19

desired-status attribute (a=des)

[30] 5

m

m

[30] 5

c2

c2

20

confirm-status attribute (a=conf)

[30] 5

m

m

[30] 5

c2

c2

21

media stream identification attribute (a=mid)

[53] 3

c5

x

[53] 3

c6

x

22

group attribute (a=group)

[53] 4

c5

x

[53] 4

c6

x

23

setup attribute (a=setup)

[83] 4

c7

c50

[83] 4

c8

c51

24

connection attribute (a=connection)

[83] 5

c7

c7

[83] 5

c8

c8

24A

DTLS association ID attribute (a=tls-id)

[240] 4

c72

c72

[240] 4

c72

c72

25

candidate IP addresses (a=candidate)

[290]

c9

c9

[290]

c10

c10

26

floor control server determination (a=floorctrl)

[108] 4

c11

c11

[108] 4

c12

c13

27

conference id (a=confid)

[108] 5

c11

c11

[108] 5

c12

c13

28

user id (a=userid)

[108] 5

c11

c11

[108] 5

c12

c13

29

association between streams and floors (a=floorid)

[108] 6

c11

c11

[108] 6

c12

c13

30

RTCP feedback capability attribute (a=rtcp-fb)

[135] 4.2

c14

c14

[135] 4.2

c15

c15

31

extension of the rtcp-fb attribute (a=rtcp-fb)

[136] 7.1

[188] 6.2, [251] 9

c14

c14

[136] 7.1, [251] 9

c15

c15

32

supported capability negotiation extensions (a=csup)

[137] 3.3.1

c16

c16

[137] 3.3.1

c17

c17

33

required capability negotiation extensions (a=creq)

[137] 3.3.2

c16

c16

[137] 3.3.2

c17

c17

34

attribute capability (a=acap)

[137] 3.4.1

c16

c16

[137] 3.4.1

c17

c17

35

transport protocol capability (a=tcap)

[137] 3.4.2

c16

c16

[137] 3.4.2

c17

c17

36

potential configuration (a=pcfg)

[137] 3.5.1

[172] 3.3.6

c16

c16

[137] 3.5.1

[172] 3.3.6

c17

c17

37

actual configuration (a=acfg)

[137] 3.5.2

c16

c16

[137] 3.5.2

c17

c17

38

connection data capability (a=ccap)

[156] 3.1

c18

c18

[156] 3.1

c19

c19

40

crypto attribute (a=crypto)

[168]

c20

c20

[167]

c20

c20

41

key management attribute (a=key-mgmt)

[167]

c21

c21

[168]

c22

c22

42

3GPP_e2ae-security-indicator (a=3ge2ae)

7.5.2

c23

c23

7.5.2

c23

c23

43

media capability (a=rmcap)

[172] 3.3.1

c24

c24

[172] 3.3.1

c26

c26

43A

media capability (a=omcap)

[172] 3.3.1

c24

c24

[172] 3.3.1

c26

c26

44

media format capability (a=mfcap)

[172] 3.3.2

c24

c24

[172] 3.3.2

c26

c26

45

media-specific capability (a=mscap)

[172] 3.3.3

c24

c24

[172] 3.3.3

c26

c26

46

latent configuration (a=lcfg)

[172] 3.3.5

c48

c48

[172] 3.3.5

c49

c49

47

session capability (a=sescap)

[172] 3.3.8

c25

c25

[172] 3.3.8

c27

c27

48

msrp path (a=path)

[178]

c28

c28

[178]

c29

c29

49

file selector (a=file-selector)

[185] 6

c30

c30

[185] 6

c31

c31

50

file transfer identifier (a= file-transfer-id)

[185] 6

c30

c30

[185] 6

c31

c31

51

file disposition (a=file-disposition)

[185] 6

c30

c30

[185] 6

c31

c31

52

file date (a=file-date)

[185] 6

c30

c30

[185] 6

c31

c31

53

file icon (a=file-icon

[185] 6

c30

c30

[185] 6

c31

c31

54

file range (a=file-range)

[185] 6

c30

c30

[185] 6

c31

c31

55

optimal media routeing visited realm (a=visited-realm)

7.5.3

c32

c32

7.5.3

c33

c33

56

optimal media routeing secondary realm (a=secondary-realm)

7.5.3

c32

c32

7.5.3

c33

c33

57

optimal media routeing media level checksum (a=omr-m-cksum)

7.5.3

c32

c32

7.5.3

c33

c33

58

optimal media routeing session level checksum (a=omr-s-cksum)

7.5.3

c32

c32

7.5.3

c33

c33

59

optimal media routeing codecs (a=omr-codecs)

7.5.3

c32

c32

7.5.3

c33

c33

60

optimal media routeing media attributes (a=omr-m-att)

7.5.3

c32

c32

7.5.3

c33

c33

61

optimal media routeing session attributes (a=omr-s-att)

7.5.3

c32

c32

7.5.3

c33

c33

62

optimal media routeing media bandwidth (a=omr-m-bw)

7.5.3

c32

c32

7.5.3

c33

c33

63

optimal media routeing session bandwidth (a=omr-s-bw)

7.5.3

c32

c32

7.5.3

c33

c33

64

ecn-attribute (a=ecn-capable-rtp)

[188]

c34

c34

[188]

c34

c34

65

T38 FAX Protocol version (a=T38FaxVersion)

[202]

n/a

c35

[202]

n/a

c36

66

T38 FAX Maximum Bit Rate (a=T38MaxBitRate)

[202]

n/a

c35

[202]

n/a

c36

67

T38 FAX Rate Management (a=T38FaxRateManagement)

[202]

n/a

c35

[202]

n/a

c36

68

T38 FAX Maximum Buffer Size (a=T38FaxMaxBuffer)

[202]

n/a

c35

[202]

n/a

c36

69

T38 FAX Maximum Datagram Size (a=T38FaxMaxDatagram)

[202]

n/a

c35

[202]

n/a

c36

70

T38 FAX maximum IFP frame size (a=T38FaxMaxIFP)

[202]

n/a

c35

[202]

n/a

c36

71

T38 FAX UDP Error Correction Scheme (a=T38FaxUdpEC)

[202]

n/a

c35

[202]

n/a

c36

72

T38 FAX UDP Error Correction Depth (a=T38FaxUdpECDepth)

[202]

n/a

c35

[202]

n/a

c36

73

T38 FAX UDP FEC Maximum Span (a=T38FaxUdpFECMaxSpan)

[202]

n/a

c35

[202]

n/a

c36

74

T38 FAX Modem Type (a=T38ModemType)

[202]

n/a

c35

[202]

n/a

c36

75

T38 FAX Vendor Info

(a=T38VendorInfo)

[202]

n/a

c35

[202]

n/a

c36

76

reduced-size RTCP (a=rtcp-rsize)

[204]

c37

c37

[204]

c38

c38

77

RTP control protocol extended report parameters (a=rtcp-xr)

[205]

c39

c39

[205]

c40

c40

78

maximum receive SDU size (a=3gpp_MaxRecvSDUSize)

[9B]

c41

c41

[9B]

c42

c42

79

content (a=content)

[206]

c43

c43

[206]

c43

c43

80

generic header extension map definition (a=extmap)

[210]

c44

c44

[210]

c45

c45

81

image attribute (a=imageattr)

[211]

c46

c46

[211]

c47

c47

82

fingerprint (a=fingerprint)

[241]

c52

c52

[241]

c53

c53

83

msrp-cema (a=msrp-cema)

[214]

c54

c54

[214]

c55

c55

84

sctp-port (a=sctp-port)

[219]

c56

c56

[219]

c56

c56

84A

max-message-size (a=max-message-size)

[219]

c56

c56

[219]

c56

c56

85

CS correlation (a=cs-correlation)

[155] 5.2.3.1

c57

c57

[155] 5.2.3.1

c57

c57

87

3GPP MTSI RTCP-APP adaptation (a=3gpp_mtsi_app_adapt)

[9B]

n/a

c58

[9B]

n/a

c59

88

3GPP MTSI Pre-defined Region-of-Interest (ROI)

(a=predefined_ROI)

[9B]

n/a

c60

[9B]

n/a

c61

89

RTP and RTCP multiplexed on one port (a=rtcp-mux)

[237], [237A]

c62

c62

[237], [237A]

c63

c63

92

Media plane optimization for WebRTC Contact (a= tra-contact)

7.5.4

c64

c64

7.5.4

c65

c65

93

Media plane optimization for WebRTC m-line (a= tra-m-line)

7.5.4

c66

c66

7.5.4

c67

c67

94

Media plane optimization for WebRTC attribute (a= tra-att)

7.5.4

c64

c64

7.5.4

c65

c65

95

Media plane optimization for WebRTC bandwidth (a= tra-bw)

7.5.4

c64

c64

7.5.4

c65

c65

98

Media plane optimization for WebRTC SCTP-association (a= tra-SCTP-association)

7.5.4

c66

c66

7.5.4

c67

c67

97

Media plane optimization for WebRTC media line number (a= tra-media-line-number)

7.5.4

c68

c68

7.5.4

c69

c69

98

Enhanced bandwidth negotiation mechanism (a=bw-info)

[9B]

n/a

c70

[9B]

n/a

c71

99

Exclusive RTP and RTCP multiplexed on one port (a=rtcp-mux-only)

[246]

c62

c62

[246]

c63

c63

100

Simulcast stream description (a=simulcast)

[249] 6.1

c73

c73

[249] 6.1

c74

c74

101

Restriction identifier (a=rid)

[250] 10

c75

c75

[250] 10

c76

c76

102

3GPP compact concurrent codec capabilities (a=ccc-list)

[9B]

n/a

c77

[9B]

n/a

c78

103

Delay Budget Information (DBI) RTCP feedback type (a=rtcp-fb:* 3gpp-delay-budget)

[9B] 6.2.8

n/a

c79

[9B] 6.2.8

n/a

c79

104

ANBR Support attribute (a=anbr)

[9B]

n/a

c80

[9B]

n/a

c80

105

Label attribute (a=label)

[277] 4

o

c81

[277] 4

o

c81

106

3GPP QoS hint attribute (a=3gpp-qos-hint)

[9B] 6.2.7.4

n/a

c81

[9B]

n/a

c81

c2: IF A.328/1 THEN m ELSE i – – integration of resource management and SIP.

c5: IF A.328/2 THEN m ELSE n/a – – grouping of media lines.

c6: IF A.328/3 THEN m ELSE IF A.328/2 THEN i ELSE n/a – – mapping of media streams to resource reservation flows, grouping of media lines.

c7: IF A.328/5 THEN m ELSE n/a.

c8: IF A.328/5 THEN i ELSE n/a.

c9: IF A.329/20 AND A.328/0A THEN m ELSE i – – media level attribute name "a=" and application of session policy.

c9: IF A.328/6 THEN m ELSE n/a – – interactive connectivity establishment.

c10: IF A.328/1 AND A.328/6 THEN m ELSE IF A.328/6 THEN i ELSE n/a – – integration of resource management and SIP, interactive connectivity establishment.

c11: IF A.328/7 THEN m ELSE n/a – – session description protocol format for binary floor control protocol streams.

c12: IF A.328/7 THEN i ELSE n/a – – session description protocol format for binary floor control protocol streams.

c13: IF A.328/7 AND A.328/0A AND A.329/20 THEN m ELSE IF A.328/7 AND A.329/20 THEN i ELSE n/a – – session description protocol format for binary floor control protocol streams, media level attribute name "a=" and application of session policy.

c14: IF (A.328/8 AND A.329/20) THEN m ELSE n/a – – extended RTP profile for real-time transport control protocol (RTCP)-based feedback (RTP/AVPF), media level attribute name "a=".

c15: IF (A.328/8 AND A.329/20) THEN i ELSE n/a – – extended RTP profile for real-time transport control protocol (RTCP)-based feedback (RTP/AVPF), media level attribute name "a=".

c16: IF A.328/9 AND A.329/20 THEN m ELSE n/a – – SDP capability negotiation, media level attribute name "a=".

c17: IF A.328/9 AND A.329/20 THEN i ELSE n/a – – SDP capability negotiation, media level attribute name "a=".

c18: IF A.328/11 AND A.329/20 THEN o ELSE n/a – – miscellaneous capabilities negotiation in the Session Description Protocol (SDP), media level attribute name "a=".

c19: IF A.328/11 AND A.329/20 THEN m ELSE n/a – – miscellaneous capabilities negotiation in the Session Description Protocol (SDP), media level attribute name "a=".

c20: IF A.328/14 AND A.328/16 AND A.329/20 THEN m ELSE n/a – – Secure Real-time Transport Protocol, media plane security using SDES, media level attribute name "a=".

c21: IF ((A.328/14 AND A.3D/21) OR A.3D/22) AND A.328/15 AND A.329/20 THEN m ELSE n/a – – Secure Real-time Transport Protocol, media plane security using KMS, end-to-end media security for MSRP using TLS and KMS, MIKEY-TICKET, media level attribute name "a=".

c22: IF ((A.328/14 AND A.3D/21) OR A.3D/22) AND A.328/15 AND A.329/20 THEN i ELSE n/a – – Secure Real-time Transport Protocol, media plane security using KMS, end-to-end media security for MSRP using TLS and KMS, MIKEY-TICKET, media level attribute name "a=".

c23: IF A.328/17 AND A.329/20 THEN m ELSE n/a – – end to access edge media security, media level attribute name "a=".

c24: IF A.328/18 THEN m ELSE n/a – – SDP media capabilities negotiation.

c25: IF A.328/18 AND A.329/14 THEN m ELSE n/a – – SDP media capabilities negotiation, session level attribute name "a=".

c26: IF A.328/18 AND A.328/0A THEN m ELSE IF A.328/18 THEN i ELSE n/a – – SDP media capabilities negotiation, application of session policy.

c27: IF A.328/18 AND A.329/14 AND A.328/0A THEN m ELSE IF A.328/18 AND A.329/14 THEN i ELSE n/a – – SDP media capabilities negotiation, session level attribute name "a=", application of session policy.

c28: IF A.328/20 AND A.329/20 THEN m ELSE n/a – – message session relay protocol, media level attribute name "a=".

c29: IF A.328/20 AND A.329/20 THEN i ELSE n/a – – message session relay protocol, media level attribute name "a=".

c30: IF A.328/21 AND A.329/20 THEN m ELSE n/a – – a SDP offer/answer mechanism to enable file transfer, media level attribute name "a=".

c31: IF A.328/21 AND A.329/20 THEN i ELSE n/a – – a SDP offer/answer mechanism to enable file transfer, media level attribute name "a=".

c32: IF A.328/22 AND A.329/20 THEN m ELSE n/a – – optimal media routeing, media level attribute name "a=".

c33: IF A.328/22 AND A.329/20 THEN i ELSE n/a – – optimal media routeing, media level attribute name "a=".

c34: IF A.328/23 THEN m ELSE i – – ECN for RTP over UDP, media level attribute name "a=".

c35: IF A.328/24 AND A.329/20 THEN m ELSE n/a – – T.38 FAX, media level attribute name "a=".

c36: IF A.328/24 AND A.329/20 THEN i ELSE n/a – – T.38 FAX, media level attribute name "a=".

c37: IF A.328/25 AND A.329/20 THEN m ELSE n/a. – – support for reduced-size RTCP, media level attribute name "a=".

c38: IF A.328/25 AND A.329/20 THEN i ELSE n/a – – support for reduced-size RTCP, media level attribute name "a=".

c39: IF A.328/26 AND A.329/20 AND A.329/14 THEN m ELSE n/a — RTCP extended reports, media level attribute name "a=", session level attribute name "a=".

c40: IF A.328/26 AND A.329/20 AND A.329/14 THEN i ELSE n/a — RTCP extended reports, media level attribute name "a=", session level attribute name "a=".

c41: IF A.328/27 AND A.329/20 AND A.329/14 THEN m ELSE n/a — maximum receive SDU size, media level attribute name "a=", session level attribute name "a=".

c42: IF A.328/27 AND A.329/20 AND A.329/14 THEN i ELSE n/a — maximum receive SDU size, media level attribute name "a=", session level attribute name "a=".

c43: IF A.328/28 AND A.329/20 THEN m ELSE n/a – – the SDP content attribute, media level attribute name "a=".

c44: IF A.328/29 AND A.329/20 AND A.329/14 THEN m ELSE n/a – – a general mechanism for RTP header extensions, media level attribute name "a=", session level attribute name "a=".

c45: IF A.328/29 AND A.329/20 AND A.329/14 THEN i ELSE n/a – – a general mechanism for RTP header extensions, media level attribute name "a=", session level attribute name "a=".

c46: IF A.328/30 AND A.329/20 THEN m ELSE n/a – – negotiation of generic image attributes in the session description protocol (SDP), media level attribute name "a=".

c47: IF A.328/30 AND A.329/20 THEN i ELSE n/a – – negotiation of generic image attributes in the session description protocol (SDP), media level attribute name "a=".

c48: IF A.328/18 AND A.329/20 THEN m ELSE n/a – – SDP media capabilities negotiation, media level attribute name "a=".

c49: IF A.328/18 AND A.329/20 AND A.328/0A THEN m ELSE IF A.328/18 AND A.329/20 THEN i ELSE n/a – – SDP media capabilities negotiation, media level attribute name "a=", application of session policy.

c50: IF (A.328/5 OR A.328/32) THEN m ELSE n/a — TCP-based media transport in the session description protocol, UDPTL over DTLS.

c51: IF (A.328/5 OR A.328/32) THEN i ELSE n/a — TCP-based media transport in the session description protocol, UDPTL over DTLS.

c52: IF (A.328/82 OR A.328/34) AND A.329/20 AND A.329/14 THEN m ELSE n/a — connection-oriented media transport over the TLS protocol in the SDP, DTLS-SRTP, media level attribute name "a=", session level attribute name "a=".

c53: IF (A.328/83 OR A.328/34) AND A.329/20 AND A.329/14 THEN i ELSE n/a — connection-oriented media transport over the TLS protocol in the SDP, DTLS-SRTP, media level attribute name "a=", session level attribute name "a=".

c54: IF A.328/20A AND A.329/20 THEN m ELSE n/a — connection establishment for media anchoring for the message session relay protocol, media level attribute name "a=".

c55: IF A.328/20A AND A.329/20 THEN i ELSE n/a — connection establishment for media anchoring for the message session relay protocol, media level attribute name "a=".

c56: IF A.328/33 AND A.329/20 THEN i ELSE n/a — SCTP on top of DTLS, media level attribute name "a=".

c57: IF A.318/10 AND A.329/20 THEN m ELSE n/a – – Session Description Protocol (SDP) extension for setting up audio media streams over circuit-switched bearers in the Public Switched Telephone Network (PSTN) and SIP, media level attribute name "a=".

c58: IF A.328/38 AND A.329/20 THEN m ELSE n/a — 3GPP MTSI RTCP-APP adaptation, media level attribute name "a=".

c59: IF A.328/38 AND A.329/20 THEN i ELSE n/a — 3GPP MTSI RTCP-APP adaptation, media level attribute name "a=".

c60: IF A.328/39 AND A.329/20 THEN o ELSE n/a – – 3GPP MTSI Pre-defined Region-of-Interest (ROI), media level attribute name "a=".

c61: IF A.328/39 AND A.329/20 THEN m ELSE n/a – – 3GPP MTSI Pre-defined Region-of-Interest (ROI), media level attribute name "a=".

c62: IF A.328/41 AND A.329/20 AND A.329/14 THEN m ELSE n/a — multiplexing RTP data and control packets on a single port, media level attribute name "a=", session level attribute name "a=".

c63: IF A.328/41 AND A.329/20 AND A.329/14 THEN i ELSE n/a — multiplexing RTP data and control packets on a single port, media level attribute name "a=", session level attribute name "a=".

c64: IF A.328/42 AND (A.329/14 OR A.329/20) THEN m ELSE n/a – -, Media plane optimization for WebRTC session or media level attribute name "a=".

c65: IF A. A.328/42 AND (A.329/14 OR A.329/20) THEN i ELSE n/a – -, Media plane optimization for WebRTC session or media level attribute name "a=".

c66: IF A.328/42 AND A.329/20 THEN m ELSE n/a – -, Media plane optimization for WebRTC media level attribute name "a=".

c67: IF A.328/42 AND A.329/20 THEN i ELSE n/a – -, Media plane optimization for WebRTC media level attribute name "a=".

c68: IF A.328/42 AND A.329/14 THEN m ELSE n/a – -, Media plane optimization for WebRTC session level attribute name "a=".

c69: IF A.328/42 AND A.329/14 THEN i ELSE n/a – -, Media plane optimization for WebRTC session level attribute name "a=".

c70: IF A.328/43 AND A.329/20 THEN o ELSE n/a – – Enhanced bandwidth negotiation mechanism, media level attribute name "a=".

c71: IF A.328/43 AND A.329/20 THEN m ELSE n/a – – Enhanced bandwidth negotiation mechanism, media level attribute name "a=".

c72: IF (A.328/32 OR A.328/34 OR A.328/35) AND A.329/20 THEN m ELSE n/a – – UDPTL over DTLS, SCTP over DTLS, DTLS-SRTP, media level attribute name "a=".

c73: IF A.328/46 AND A.329/20 THEN m ELSE n/a – – Using simulcast in SDP and RTP sessions, media level attribute name "a=".

c74: IF A.328/46 AND A.329/20 THEN i ELSE n/a – – Using simulcast in SDP and RTP sessions, media level attribute name "a=".

c75: IF A.328/47 AND A.329/20 THEN o ELSE n/a – – RTP payload format restrictions, media level attribute name "a=".

c76: IF A.328/47 AND A.329/20 THEN i ELSE n/a – – RTP payload format restrictions, media level attribute name "a=".

c77: IF A.328/48 AND A.329/14 THEN o ELSE n/a – – Compact Concurrent Codec Negotiation and Capabilities, session level attribute name "a=".

c78: IF A.328/48 AND A.329/14 THEN i ELSE n/a – – Compact Concurrent Codec Negotiation and Capabilities, session level attribute name "a=".

c79: IF A.328/49 AND A.329/20 m ELSE n/a – – Delay Budget Information (DBI), media level attribute name "a=".

c80: IF A.328/50 AND A.329/20 THEN m ELSE n/a – – Access Network Bitrate Recommendation (ANBR), media level attribute name "a=".

c81: IF (A.328/51 OR A.328/52) AND A.329/20 THEN o ELSE n/a – – Framework for Live Uplink Streaming (FLUS), 3GPP MTSI client using data channels, media level attribute name "a=".

NOTE 1: Further specification of the usage of this attribute is defined by specifications relating to individual codecs.

Ref.

RFC status

Profile status

Ref.

RFC status

Profile status

1

coordination of video orientation (urn:3gpp:video-orientation)

[9B]

n/a

m

[9B]

n/a

i

2

higher granularity coordination of video orientation (urn:3gpp:video-orientation:6)

[9B]

n/a

m

[9B]

n/a

i

3

video region-of-interest predefined-roi-sent (urn:3gpp:predefined-roi-sent)

[9B]

n/a

m

[9B]

n/a

i

4

video region-of-interest arbitrary-roi-sent (urn:3gpp:roi-sent)

[9B]

n/a

m

[9B]

n/a

i