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Session Description  Addressing  generic rules  "a=" SDP Attributes
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SDP attributes defined in

3GPP TS 26.346 – MBMS - Protocols and Codecs

3GPP TS 26.346 – Clause 7.3.2 – Clause 8.3.1
a=flute‑tsi   a=mbms‑mode   a=FEC‑declaration   a=FEC   a=FEC‑OTI‑extension   a=mbms‑repair   a=mbms‑flowid   a=X‑3gpp‑FEC‑Interleaving   a=3GPP‑QoE‑Metrics

 

attribute-fields  =/
flute‑tsi‑line /  mbms‑bearer‑mode‑declaration‑line /  fec‑declaration‑line /  fec‑line /  sdp‑fec‑oti‑extension‑line /  sdp‑fec‑parameter‑line /  Sdp‑mbms‑flowid‑attr /  Interleaving /  QoE‑Metrics‑line
flute-tsi-line =
"a=flute-tsi:"  tsi  CRLF
;  see  Clause 7.3.2.4 of TS 26.346
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tsi =
1*15DIGIT
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mbms-bearer-mode-declaration-line =
"a=mbms-mode:"  ( "broadcast"  SP  tmgi  SP  mbms‑counting‑information ) /
( "broadcast‑mbsfn"  SP  tmgi )  CRLF
;  see  Clause 7.3.2.7 of TS 26.346  and  Section 5.1 of RFC 6064
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tmgi =
1*15DIGIT
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mbms-counting-indication =
1*DIGIT
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fec-declaration-line =
"a=FEC‑declaration:"  fec‑ref  SP  fec‑enc‑id  [ ";"  SP  fec‑inst‑id ]  CRLF
;  see  Clause 7.3.2.8 of TS 26.346
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fec-ref =
1*3DIGIT
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fec-enc-id =
"encoding‑id="  enc‑id
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enc-id =
1*DIGIT
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fec-inst-id =
"instance‑id="  inst‑id
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inst-id =
1*DIGIT
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fec-line =
"a=FEC:"  fec‑ref  CRLF
;  see  Clause 7.3.2.8 of TS 26.346
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sdp-fec-oti-extension-line =
"a=FEC‑OTI‑extension:"  fec‑ref  SP  oti‑extension  CRLF
;  see  Clause 8.3.1.8 of TS 26.346
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fec-ref =
1*3DIGIT
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oti-extension =
base64
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base64 =
*base64‑unit   [ base64‑pad ]
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base64-unit =
4base64‑char
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base64-pad =
2base64‑char  "==" /  3base64‑char   "="
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base64-char =
ALPHA /  DIGIT /  "+" /  "/"
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sdp-fec-parameter-line =
"a=mbms‑repair:"  0*1SP  fec‑ref  SP  parameter‑list  CRLF
;  see  Clause 8.3.1.8 of TS 26.346  and  Section 5.3 of RFC 6064
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parameter-list =
parameter‑spec  *( 1*SP  parameter‑spec )
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parameter-spec =
name  "="  value
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name =
1*( ALPHA /  DIGIT /  "-" )
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value =
1*( email‑safe )
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Sdp-mbms-flowid-attr =
"a=mbms‑flowid:"  *WSP  flow‑id‑spec  *( ","  *WSP  flow‑id‑spec )  CRLF
;  see  Clause 8.3.1.9 of TS 26.346  and  Section 5.2 of RFC 6064
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flow-id-spec =
flowID   "="  address-spec  "/"  port-spec
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address-spec =
IP4-multicast  /  IP6‑multicast
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IP4-multicast =
m1  3*( "."  decimal-uchar )
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m1 =
( "22" ( "4"  /  "5"  /  "6"  /  "7"  /  "8"  /  "9" ) )  /  ("23" DIGIT ) )
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IP6-multicast =
hexpart
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hexpart =
hexseq  /  hexseq   "::"  [ hexseq ]  /  "::"  [ hexseq ]
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hexseq =
hex4  *( ":"  hex4 )
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hex4 =
1*4HEXDIG
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port-spec =
1*5DIGIT
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Interleaving =
"a=X‑3gpp‑FE‑Interleaving:"  SP  flow_interleaving  *( ","  flow_interleaving )   CRLF
;  see  Clause 8.3.1.11 of TS 26.346
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flow_interleaving =
flowID   "="  [ "ordered" /  "mixed" /  "reverse" ]
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QoE-Metrics-line =
"a"  "="  "3GPP‑QoE‑Metrics:"  att‑measure‑spec  *( ","  att‑measure‑spec )  CRLF
;  see  Clause 8.3.2.1 of TS 26.346
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att-measure-spec =
Metrics  ";"  Sending‑rate  [  ";"  Measure‑Range ]  [ ";"  Measure‑Resolution ]  *( [ ";"  Parameter‑Ext ] )
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Metrics =
"metrics"  "="  "{"  Metrics‑Name  *( "|"  Metrics‑Name )  "}"
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Metrics-Name =
1*( (0x21..0x2b) /  (0x2d..0x3a) /  (0x3c..0x7a) /  0x7e )
; VCHAR  except  ";"  ","  "{"  "}"
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Sending-rate =
"rate"  "="  1*DIGIT /  "End"
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Measure-Resolution =
"resolution" "=" 1*DIGIT
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Measure-Range =
"range"  ":"  Ranges-Specifier
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; ranges-specifier as defined in   RFC 2326 – Section 12.29

Parameter-Ext =
( 1*DIGIT  [ "."  1*DIGIT ] )  /
( 1*( (0x21..0x2b)  /  (0x2d..0x3a)  /  (0x3c..0x7a)  /  0x7c / 0x7e) ) )
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