The Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Static Dictionary for Signaling Compression (SigComp)

García‐Martín, Miguel A.; Bormann, Carsten; Ott, Joerg; Price, Richard; Roach, Adam

doi:10.17487/rfc3485

Cited by 16 publications

(17 citation statements)

References 4 publications

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“…At the beginning of a sequence, the adaptive dictionary has yet to be built and the frequency of string repetitions is low. Static dictionaries such as the SIP static dictionary [5], can help in reducing this problem. Their use is however very limited due to the fact that the information they provide helps only for the very first stages of the compression process while consuming a significant amount of resources.…”

Section: Compressionmentioning

confidence: 99%

Template-Based Signaling Compression for Push-To-Talk over Cellular (PoC)

Forte

Schulzrinne

2008

Principles, Systems and Applications of IP Telecommunications. Services and Security for Next Generation Networks

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The Session Initiation Protocol (SIP) has been chosen as the standard signaling protocol for the IP Multimedia Subsystem (IMS). SIP is a text-based protocol with messages often exceeding 1000 bytes in size, thus causing high call set-up delays on low bit-rate links.Signaling Compression (SigComp) is currently the only option cellular operators have for the compression of signaling messages. We study the performance of SigComp, showing that SigComp cannot achieve the level of compression required by Push-To-Talk over Cellular (PoC) services in the IMS. Furthermore, we propose an alternative compression mechanism, namely Template Based Compression (TBC), and show through measurements how we can achieve higher compression ratios than SigComp, satisfying the requirements for PoC on low bit-rate links.

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Section: Compressionmentioning

confidence: 99%

Template-Based Signaling Compression for Push-To-Talk over Cellular (PoC)

Forte

Schulzrinne

2008

Principles, Systems and Applications of IP Telecommunications. Services and Security for Next Generation Networks

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“…The most basic use of the local state advertisement is the advertisement of a dictionary (e.g., the dictionary specified by SIP/ SDP Static Dictionary [4]) or a piece of bytecode. In general, these pieces of state:…”

Section: Dictionariesmentioning

confidence: 99%

“…This document updates SigComp [1], SigComp Extended [2], and the SigComp Static Dictionary [4]. The security considerations for [2] and [4] are the same as for [1]; therefore, this section discusses only how the security considerations for [1] are affected by the updates.…”

Section: Security Considerationsmentioning

confidence: 99%

“…The security considerations for [2] and [4] are the same as for [1]; therefore, this section discusses only how the security considerations for [1] are affected by the updates.…”

Section: Security Considerationsmentioning

confidence: 99%

“…RFC 3485 SIP/SDP Static Dictionary SIP/SDP Static Dictionary [4] provides a dictionary of strings frequently used in SIP and SDP messages. The format of the dictionary is the list of strings followed by a table of offset references to the strings so that a compressor can choose to reference the address of the string or the entry in the table.…”

mentioning

confidence: 99%

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