June 2004
Intermediate to advanced
840 pages
39h 47m
English
Content preview from The Internet and Its Protocols
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15.4 Header Compression 747
0]1 ,2,314,5[6,7,8[9~112[3,4,5 6 7 8 9
~--]1,2,3 4,5]6,7,8,9~1
CID 1 1 1 1 Seq UDP
Checksum
O hec'sum i I I
(continued)
M S T I CC IP
Fragment Identifier Delta
RTP
Sequence Number Delta RTP Timestamp Delta
RTP Timestamp Delta (continued)
RTP CSRC
List
Uncompressed RTP Payload
Fig,,re 15.21 A COMPRESSED_RTP packet showing the presence of all of the optional header fields.
~1121314lsl617
CID Type = 2
(16 bit CIDs)
I Rsvd Seq
819~1121314ls
Count of Contexts
Rsv Generation
6]71819~1 [213141516171819~1
First Errored
CID
Further Requested
CIDs
Figure 15.22 A CONTEXT_STATE packet using
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