IETF
TVR(Time Variant Routing) Drafts
1. TVR (Time-Variant Routing) Use Cases
Publication URL: https://datatracker.ietf.org/doc/draft-ietf-tvr-use-cases/
Introduction:
This document introduces use cases where Time-Variant Routing (TVR) computations (i.e. routing computations taking into considerations time-based or scheduled changes to a network) could improve routing protocol convergence and/or network performance.
2. TVR (Time-Variant Routing) Requirements
Publication URL: https://datatracker.ietf.org/doc/draft-ietf-tvr-requirements/
Introduction:
Time-Variant Routing (TVR) refers to the calculation of a path or subpath through a network where the time of message transmission (or receipt) is part of the overall route computation. This means that, all things being equal, a TVR computation might produce different results depending on the time that the computation is performed without other detectable changes to the network topology or other cost functions associated with the route.
This document introduces requirements where TVR computations could improve message exchange in a network.
3. IS-IS and OSPF extensions for TVR (Time-Variant Routing)
Publication URL: https://datatracker.ietf.org/doc/draft-zw-tvr-igp-extensions/
Introduction:
TVR needs IGP to calculate different results depending on the time, without convergence after the detection of link or nodes. IGP nodes need to learn the predictable and scheduled changes in advance. This document defines the IGP extensions for predictable and scheduled changes of TVR.
4. Using ALTO for exposing Time-Variant Routing information
Publication URL: https://datatracker.ietf.org/doc/draft-contreras-tvr-alto-exposure/
Introduction:
Network operations can require time-based, scheduled changes in nodes, links, adjacencies, etc. All those changes can alter the connectivity in the network in a predictable manner, which is known as Time-Variant Routing (TVR). Existing IETF solutions like ALTO can assist, as an off-path mmechanism, on the exposure of such predicted changes to both internal and external applications then anticipating the occurence of routing changes. This document describes how ALTO helps in that purpose.
5. YANG Data Model for Scheduled Attributes
Publication URL: https://datatracker.ietf.org/doc/draft-united-tvr-schedule-yang/
Introduction:
The YANG model in this document includes three modules, and can be used to manage network resources and topologies with scheduled attributes, such as predictable link loss and link connectivity as a function of time. The intent is to have this information be utilized by Time-Variant Routing systems.
6. Consideration for TVR (Time-Variant Routing) Requirements
Publication URL: https://datatracker.ietf.org/doc/draft-wang-tvr-requirements-consideration/
Introduction:
This document makes some supplements to TVR’s requirements, including advertisement, identification, classification of node attributes, and appropriate system settings.
7. Satellite Network Routing Use Cases
Publication URL: https://datatracker.ietf.org/doc/draft-hou-tvr-satellite-network-usecases/
Introduction:
Time-Variant Routing (TVR) is chartered and proposed to solve the problem of time-based, scheduled changes, including the variations of links, adjacencies, cost, and traffic volumes in some cases. In a satellite network, the network is in continual motion which will cause detrimental consequences on the routing issue. However, each network node in a satellite network follows a predefined orbit around the Earth and represents an appropriate example of time-based scheduled mobility. Therefore, TVR can be implemented to improve the routing and forwarding process in satellite networks. This document mainly focuses on the use cases in this scenario.
8. Use Case of Tidal Network
Publication URL: https://datatracker.ietf.org/doc/draft-zzd-tvr-use-case-tidal-network/
Introduction:
The tidal effect of traffic is very typical on our network, this document introduces the time variant routing scenario in the tidal network, and then describes the assumptions and routing impacts based on the use case. Finally, an exempar of tidal network is provided.
9. The routing considerations for TVR
Publication URL: https://datatracker.ietf.org/doc/draft-zhang-tvr-routing-considerations/
Introduction:
Time-Variant Routing (TVR) introduces a scenario of calculating a path, or sub-path within a network, taking into account the timing of message transmission or receipt as an integral part of the overall route computation. This document introduces three modes of routing computation for TVR scenario.
DTN(Delay/Disruption Tolerant Networking) Drafts
1. DTN Management Architecture
Publication URL: https://datatracker.ietf.org/doc/html/draft-ietf-dtn-dtnma/
Introduction:
This document describes a DTN management architecture (DTNMA) suitable for managing devices in any challenged environment but, in particular, those communicating using the DTN Bundle Protocol (BPv7). Operating using BPv7 require that the architecture not presume any synchronized transport behavior. This means that the DTNMA cannot operate as a query-response system across the network. This allows implementations compliant with the DTNMA to operate in extremely challenging conditions, such as over uni-directional links and other places where BPv7 is the preferred transport.
2. Bundle Protocol Version 7
Publication URL: https://datatracker.ietf.org/doc/html/rfc9171/
Introduction:
This document presents a specification for the Bundle Protocol, adapted from the experimental Bundle Protocol specification developed by the Delay-Tolerant Networking Research Group of the Internet Research Task Force and documented in RFC 5050.
3. Delay-Tolerant Networking TCP Convergence-Layer Protocol Version 4
Publication URL: https://datatracker.ietf.org/doc/html/rfc9174/
Introduction:
This document describes a TCP convergence layer (TCPCL) for Delay- Tolerant Networking (DTN). This version of the TCPCL protocol resolves implementation issues in the earlier TCPCL version 3 as defined in RFC 7242 and provides updates to the Bundle Protocol (BP) contents, encodings, and convergence-layer requirements in BP version 7 (BPv7). Specifically, TCPCLv4 uses BPv7 bundles encoded by the Concise Binary Object Representation (CBOR) as its service data unit being transported and provides a reliable transport of such bundles. This TCPCL version also includes security and extensibility mechanisms.
4. Lightweight Bundle Protocol Edge Node with Zero-Configuration and Zero-State
Publication URL: https://datatracker.ietf.org/doc/draft-sipos-dtn-edge-zeroconf/
Introduction:
This document explains how to use existing protocols, registries, code points, and algorithms to operate a Bundle Protocol (BP) edge node within a stable, non-challenged local underlayer IP network without the need for prior BP-layer configuration or long-term state. The purpose of this is to significantly lower the barrier to entry for lightweight BP edge nodes intended to act as endpoints for one (or only a few) BP applications.
Other Related Drafts
1. LISP for Satellite Networks
Publication URL: https://datatracker.ietf.org/doc/html/draft-farinacci-lisp-satellite-network/
Introduction:
This specification describes how the LISP architecture and protocols can be used over satellite network systems. The LISP overlay runs on earth using the satellite network system in space as the underlay.
2. Considerations for Benchmarking Network Performance in Satellite Internet Constellations
Publication URL: https://datatracker.ietf.org/doc/html/draft-lai-bmwg-sic-benchmarking/
Introduction:
This draft describes our basic considerations as specifications to guide the network performance benchmark for SICs. A satellite network constructed upon emerging SICs in low earth orbit has many unique characteristics as compared to existing terrestrial networks. Specifically, our considerations include multiple networking models of emerging SICs, a data-driven benchmarking approach which may enable testers to build a laboratory benchmark environment with acceptable flexibility and fidelity to support various experiments, critical configuration parameters that might affect the SIC network performance, and several suggested test cases for network performance benchmarking.
3. Problems and Requirements of Satellite Constellation for Internet
Publication URL: https://datatracker.ietf.org/doc/html/draft-lhan-problems-requirements-satellite-net/
Introduction:
This document presents the detailed analysis about the problems and requirements of satellite constellation used for Internet. It starts from the satellite orbit basics, coverage calculation, then it estimates the time constraints for the communications between satellite and ground-station, also between satellites. How to use satellite constellation for Internet is discussed in detail including the satellite relay and satellite networking. The problems and requirements of using traditional network technology for satellite network integrating with Internet are finally outlined.
4. Semantic Address Based Instructive Routing for Satellite Network
Publication URL: https://datatracker.ietf.org/doc/html/draft-lhan-satellite-instructive-routing/
Introduction:
This document presents a method to do IP routing over satellite network that consists of LEO (Low Earth Orbit) satellites and ground-stations. The method uses the source routing mechanism. The whole routing info is obtained by path calculation. The routing path information is converted to be a list of instructions and embedded into user packet’s IPv6 extension header. At each hop or each satellite, the routing process engine will forward the packet based on the specified instruction for the satellite. Until the packet reaches the edge of satellite network, or the last satellite, the packet will be sent to a ground station.
5. Satellite Semantic Addressing for Satellite Constellation
Publication URL: https://datatracker.ietf.org/doc/html/draft-lhan-satellite-semantic-addressing/
Introduction:
This document presents a semantic addressing method for satellites in satellite constellation connecting with Internet. The satellite semantic address can indicate the relative position of satellites in a constellation. The address can be used with traditional IP address or MAC address or used independently for IP routing and switching.
6. Routing and Addressing Challenges Introduced by New Satellite Constellations
Publication URL: https://datatracker.ietf.org/doc/html/draft-kw-rtgwg-satellite-rtg-add-challanges/
Introduction:
This document summerises near-to-mid-term space-networking problems; it outlines the key components, challenges, and requirements for integrating future space-based network infrastructure with existing networks and mechanisms. Furthermore, this document highlights the network control and transport interconnection, and identify the resources and functions required for successful interconnection of space-based and Earth-based Internet infrastructure.
7. Problems and Requirements of Addressing in Integrated Space-Terrestrial Network
Publication URL: https://datatracker.ietf.org/doc/html/draft-li-istn-addressing-requirement/
Introduction:
This document presents a detailed analysis of the problems and requirements of network addressing in “Internet in space” for terrestrial users. It introduces the basics of satellite mega- constellations, terrestrial terminals/ground stations, and their inter-networking. Then it explicitly analyzes how space-terrestrial mobility yeilds challenges for the logical topology, addressing, and their impact on routing. The requirements of addressing in the space-terrestrial network are discussed in detail, including uniqueness, stability, locality, scalability, efficiency and backward compatibility with terrestrial Internet. The problems and requirements of network addressing in space-terrestrial networks are finally outlined.
8. Problems and Requirements of Source Address Spoofing in Integrated Space and Terrestrial Networks
Publication URL: https://datatracker.ietf.org/doc/html/draft-jliu-istn-savi-requirement/
Introduction:
This document presents the detailed analysis about the problems and requirements of dealing with the threat of source address spoofing in Integrated Space and Terrestrial Networks (ISTN). First, characteristics of ISTN that cause DDos are identified. Secondly, it analyzes the major reasons why existing terrestrial source address validation mechanism does not fit well for ISTN. Then, it outlines the major requirements for improvement on source address validation mechanism for ISTN.
9. Enhancing Transport Protocols over Satellite Networks
Publication URL: https://datatracker.ietf.org/doc/html/draft-jones-tsvwg-transport-for-satellite/
Introduction:
This document follows the terminology proposed in [I-D.irtf-panrg-path-properties] to describe the current characterises of common satellite paths. This document also describes considerations when implementing and deploying reliable transport protocols that are intended to work efficiently over paths that include a satellite system. It discusses available network mitigations and offers advice to designers of protocols and operators of satellite networks.
10. Network Coding for Satellite Systems
Publication URL: https://datatracker.ietf.org/doc/html/rfc8975/
Introduction:
This document is a product of the Coding for Efficient Network Communications Research Group (NWCRG). It conforms to the directions found in the NWCRG taxonomy (RFC 8406). The objective is to contribute to a larger deployment of Network Coding techniques in and above the network layer in satellite communication systems. This document also identifies open research issues related to the deployment of Network Coding in satellite communication systems.
11. A Routing Architecture for Satellite Networks
Publication URL: https://datatracker.ietf.org/doc/draft-li-arch-sat/
Introduction:
This document proposes a routing architecture for satellite networks based on existing routing protocols and mechanisms, enhanced with scheduled link connectivity change information. This document proposes no protocol changes.
12. Lightweight Route Information Advertisement for LEO Mega-constellation
Publication URL: https://datatracker.ietf.org/doc/draft-hou-lsr-satellite-route-advertisement/
Introduction:
This document presents a lightweight route information advertisement method in satellite networks. On the one hand, the method selects the advertisement link by the way of route-associated judgment, to reduce the overhead of route information advertisement. On the other hand, the method provides a manner for dealing with link fault during the route information advertisement process, to ensure the reliability of routing information advertisement.
13. Routing Framework for LEO Mega-constellation Based on Region Division
Publication URL: https://datatracker.ietf.org/doc/draft-hou-rtgwg-satellite-routing-framework/
Introduction:
This document presents a routing framework for LEO mega-constellation. Based on the orbit position characteristic and the predictable topology, this framwork realizes flexible region division, establishes intra-region and inter-region path, as well as completes end-to-end data forwarding..
Side Meetings
1. Satelliet Network Side Meeting @IETF116
Presentations & Report URL: https://github.com/lh95129/IETF-116-satellite-network-side-meeting/tree/main
Introduction:
Focusing on the networking issues of using satellite network for NTN integration where the satellite constellation is an infrastructure network. i.e. Large scale LEO satellite constellation forms a carrier network for internet access or mobile back haul.
2. Protocol Performance over Satellite @IETF117
Presentations & Report URL: https://erg.abdn.ac.uk/users/gorry/stuff/ETOSAT/IETF-117.html
Introduction:
This meeting is for participants to discuss transport protocol performance over deployed satellite systems. The meeting is related to activities discussed on the ETOSAT mailing list, associated with PANRG.
3. Satellite networks @IETF117
Presentations & Report URL: https://github.com/cjbc/ietf-ntn/
Introduction:
To discuss potential topics in scope of the IETF regarding Satellite networks.
Hackathon
1. Satellite Routing @ IETF115
Publication URL: https://github.com/Satellite-Routing/IETF115-Hackthon
2. Satellite Routing @ IETF116
Publication URL: https://github.com/Satellite-Routing/IETF116-Hackathon
3. Dynamic Network Routing @ IETF118
Publication URL: https://github.com/Satellite-Routing/IETF118-hackathon
OpenSource
1.Satellite Routing
Publication URL: https://github.com/Satellite-Routing/
IETF Mailing List
Address: tvr@ietf.org
To subscribe: https://www.ietf.org/mailman/listinfo/tvr
Archive: https://mailarchive.ietf.org/arch/browse/tvr/
Address: sat-int@ietf.org
To subscribe: https://www.ietf.org/mailman/listinfo/sat-int