ROHC

This document specifies a RObust Header Compression (ROHC) profile for compression of TCP/IP packets. The profile, called ROHC-TCP, provides efficient and robust compression of TCP headers, including frequently used TCP options such as selective acknowledgments (SACKs) and Timestamps.

ROHC-TCP works well when used over links with significant error rates and long round-trip times. For many bandwidth-limited links where header compression is essential, such characteristics are common.

This specification obsoletes RFC 4996. It fixes a technical issue with the SACK compression and clarifies other compression methods used. [STANDARDS-TRACK]

IP Security (IPsec) provides various security services for IP traffic. However, the benefits of IPsec come at the cost of increased overhead. This document outlines a framework for integrating Robust Header Compression (ROHC) over IPsec (ROHCoIPsec). By compressing the inner headers of IP packets, ROHCoIPsec proposes to reduce the amount of overhead associated with the transmission of traffic over IPsec Security Associations (SAs). This document is not an Internet Standards Track specification; it is published for informational purposes.

In order to integrate Robust Header Compression (ROHC) with IPsec, a mechanism is needed to signal ROHC channel parameters between endpoints. Internet Key Exchange (IKE) is a mechanism that can be leveraged to exchange these parameters. This document specifies extensions to IKEv2 that will allow ROHC and its associated channel parameters to be signaled for IPsec Security Associations (SAs). [STANDARDS-TRACK]

Integrating Robust Header Compression (ROHC) with IPsec (ROHCoIPsec) offers the combined benefits of IP security services and efficient bandwidth utilization. However, in order to integrate ROHC with IPsec, extensions to the Security Policy Database (SPD) and Security Association Database (SAD) are required. This document describes the IPsec extensions required to support ROHCoIPsec. [STANDARDS-TRACK]

The Robust Header Compression (ROHC) protocol provides an efficient, flexible, and future-proof header compression concept. It is designed to operate efficiently and robustly over various link technologies with different characteristics.

The ROHC framework, along with a set of compression profiles, was initially defined in RFC 3095. To improve and simplify the ROHC specifications, this document explicitly defines the ROHC framework and the profile for uncompressed separately. More specifically, the definition of the framework does not modify or update the definition of the framework specified by RFC 3095.

This specification obsoletes RFC 4995. It fixes one interoperability issue that was erroneously introduced in RFC 4995, and adds some minor clarifications. [STANDARDS-TRACK]

This document specifies ROHC (Robust Header Compression) profiles that efficiently compress RTP/UDP/IP (Real-Time Transport Protocol, User Datagram Protocol, Internet Protocol), RTP/UDP-Lite/IP (User Datagram Protocol Lite), UDP/IP, UDP-Lite/IP, IP and ESP/IP (Encapsulating Security Payload) headers.

This specification defines a second version of the profiles found in RFC 3095, RFC 3843 and RFC 4019; it supersedes their definition, but does not obsolete them.

The ROHCv2 profiles introduce a number of simplifications to the rules and algorithms that govern the behavior of the compression endpoints. It also defines robustness mechanisms that may be used by a compressor implementation to increase the probability of decompression success when packets can be lost and/or reordered on the ROHC channel. Finally, the ROHCv2 profiles define their own specific set of header formats, using the ROHC formal notation. [STANDARDS-TRACK]

This document defines Robust Header Compression - Formal Notation (ROHC-FN), a formal notation to specify field encodings for compressed formats when defining new profiles within the ROHC framework. ROHC-FN offers a library of encoding methods that are often used in ROHC profiles and can thereby help to simplify future profile development work. [STANDARDS-TRACK]

RFC 3095 defines the RObust Header Compression (ROHC) framework and profiles for IP (Internet Protocol), UDP (User Datagram Protocol), RTP (Real-Time Transport Protocol), and ESP (Encapsulating Security Payload). Some parts of the specification are unclear or contain errors that may lead to misinterpretations that may impair interoperability between different implementations. This document provides corrections, additions, and clarifications to RFC 3095; this document thus updates RFC 3095. In addition, other clarifications related to RFC 3241 (ROHC over PPP), RFC 3843 (ROHC IP profile) and RFC 4109 (ROHC UDP-Lite profiles) are also provided. [STANDARDS-TRACK]

This memo describes TCP/IP field behavior in the context of header compression. Header compression is possible because most header fields do not vary randomly from packet to packet. Many of the fields exhibit static behavior or change in a more or less predictable way. When a header compression scheme is designed, it is of fundamental importance to understand the behavior of the fields in detail. An example of this analysis can be seen in RFC 3095. This memo performs a similar role for the compression of TCP/IP headers. This memo provides information for the Internet community.

This document defines a ROHC (Robust Header Compression) profile for compression of IP/UDP/RTP (Internet Protocol/User Datagram Protocol/Real-Time Transport Protocol) packets, utilizing functionality provided by the lower layers to increase compression efficiency by completely eliminating the header for most packets during optimal operation. The profile is built as an extension to the ROHC RTP profile. It defines additional mechanisms needed in ROHC, states requirements on the assisting layer to guarantee transparency, and specifies general logic for compression and decompression related to the usage of the header-free packet format. This document is a replacement for RFC 3242, which it obsoletes. [STANDARDS-TRACK]

RObust Header Compression (ROHC), RFC 3095, defines a framework for header compression, along with a number of compression protocols (profiles). One operating assumption for the profiles defined in RFC 3095 is that the channel between compressor and decompressor is required to maintain packet ordering. This document discusses aspects of using ROHC over channels that can reorder packets. It provides guidelines on how to implement existing profiles over such channels, as well as suggestions for the design of new profiles. This memo provides information for the Internet community.

This document defines context replication, a complement to the context initialization procedure found in Robust Header Compression (ROHC), as specified in RFC 3095. Profiles defining support for context replication may use the mechanism described herein to establish a new context based on another already existing context. Context replication is introduced to reduce the overhead of the context establishment procedure. It may be especially useful for the compression of multiple short-lived flows that may be occurring simultaneously or near-simultaneously, such as short-lived TCP flows. [STANDARDS-TRACK]

This document contains requirements on the TCP/IP header compression scheme (profile) to be developed by the RObust Header Compression (ROHC) Working Group. The document discusses the scope of TCP compression, performance considerations, assumptions about the surrounding environment, as well as Intellectual Property Rights concerns. The structure of this document is inherited from RFC 3096, which defines IP/UDP/RTP requirements for ROHC. This memo provides information for the Internet community.

This document defines Robust Header Compression (ROHC) profiles for compression of Real-Time Transport Protocol, User Datagram Protocol-Lite, and Internet Protocol (RTP/UDP-Lite/IP) packets and UDP-Lite/IP. These profiles are defined based on their differences with the profiles for UDP as specified in RFC 3095. [STANDARDS-TRACK]

The original RObust Header Compression (ROHC) RFC (RFC 3095) defines a framework for header compression, along with compression protocols (profiles) for IP/UDP/RTP, IP/ESP (Encapsulating Security Payload), IP/UDP, and also a profile for uncompressed packet streams. However, no profile was defined for compression of IP only, which has been identified as a missing piece in RFC 3095. This document defines a ROHC compression profile for IP, similar to the IP/UDP profile defined by RFC 3095, but simplified to exclude UDP, and enhanced to compress IP header chains of arbitrary length. [STANDARDS-TRACK]

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes a set of managed objects that allow monitoring of running instances of RObust Header Compression (ROHC). The managed objects defined in this memo are grouped into three MIB modules. The ROHC-MIB module defines managed objects shared by all ROHC profiles, the ROHC-UNCOMPRESSED-MIB module defines managed objects specific to the ROHC uncompressed profile, the ROHC-RTP-MIB module defines managed objects specific to the ROHC RTP (Real-Time Transport Protocol) profile, the ROHC UDP (User Datagram Protocol) profile, the ROHC ESP (Encapsulating Security Payload) profile, and the ROHC LLA (Link Layer Assisted) profile. [STANDARDS-TRACK]

This document aims to clarify terms and concepts presented in RFC 3095. RFC 3095 defines a Proposed Standard framework with profiles for RObust Header Compression (ROHC). The standard introduces various concepts which might be difficult to understand and especially to relate correctly to the surrounding environments where header compression may be used. This document aims at clarifying these aspects of ROHC, discussing terms such as ROHC instances, ROHC channels, ROHC feedback, and ROHC contexts, and how these terms relate to other terms, like network elements and IP interfaces, commonly used, for example, when addressing MIB issues. This memo provides information for the Internet community.

This document defines an additional mode of the link-layer assisted RObust Header Compression (ROHC) profile, also known as the zero-byte profile, beyond the two defined in RFC 3242. Zero-byte header compression exists in order to prevent the single-octet ROHC header from pushing a packet voice stream into the next higher fixed packet size for the radio. It is usable in certain widely deployed older air interfaces. This document adds the zero-byte operation for ROHC Bidirectional Reliable mode (R-mode) to the ones specified for Unidirectional (U-mode) and Bidirectional Optimistic (O-mode) modes of header compression in RFC 3242. [STANDARDS-TRACK]

This document describes lower layer guidelines for robust header compression (ROHC) and the requirements ROHC puts on lower layers. The purpose of this document is to support the incorporation of robust header compression algorithms, as specified in the ROHC working group, into different systems such as those specified by Third Generation Partnership Project (3GPP), 3GPP Project 2 (3GPP2), European Technical Standards Institute (ETSI), etc. This document covers only lower layer guidelines for compression of RTP/UDP/IP and UDP/IP headers as specified in [RFC3095]. Both general guidelines and guidelines specific for cellular systems are discussed in this document. This memo provides information for the Internet community.

This document describes an option for negotiating the use of robust header compression (ROHC) on IP datagrams transmitted over the Point- to-Point Protocol (PPP). It defines extensions to the PPP Control Protocols for IPv4 and IPv6. [STANDARDS-TRACK]

This document contains requirements for the 0-byte IP/UDP/RTP (Internet Protocol/User Datagram Protocol/Real-Time Transport Protocol) header compression scheme to be developed by the Robust Header Compression (ROHC) Working Group. It also includes the basic assumptions for the typical link layers over which 0-byte compression may be implemented, and assumptions about its usage in general.

This document specifies a highly robust and efficient header compression scheme for RTP/UDP/IP (Real-Time Transport Protocol, User Datagram Protocol, Internet Protocol), UDP/IP, and ESP/IP (Encapsulating Security Payload) headers. [STANDARDS-TRACK]

This document contains requirements for robust IP/UDP/RTP (Internet Protocol/User Datagram Protocol/Real-Time Transport Protocol) header compression to be developed by the ROHC (Robust Header Compression) WG. It is based on the ROHC charter, discussions in the WG, the 3GPP document "3GPP TR 23.922", version 1.0.0 of October 1999, as well as contributions from 3G.IP. This memo provides information for the Internet community.