Repository : ssh://git@open-mesh.org/doc

On branches: backup-redmine/2018-08-24,backup-redmine/2019-09-14,master

commit 1f6a29be12251b8dc05f8fb323c138ce2675bdd8 Author: Marek Lindner mareklindner@neomailbox.ch Date: Sat May 12 14:25:44 2018 +0000

doc: open-mesh/ResearchProposals

1f6a29be12251b8dc05f8fb323c138ce2675bdd8 open-mesh/ResearchProposals.textile | 80 +++++++++++++------------------------ 1 file changed, 27 insertions(+), 53 deletions(-)

diff --git a/open-mesh/ResearchProposals.textile b/open-mesh/ResearchProposals.textile index b2e71d2..40c24ae 100644 --- a/open-mesh/ResearchProposals.textile +++ b/open-mesh/ResearchProposals.textile @@ -1,58 +1,32 @@ h1. Research Proposals on B.A.T.M.A.N.-Advanced

-h3. Improving link metrics - -The sheer measurement of the OGM delivery ratio is -a poor metric for link quality evaluation. -It is not able to distinguish fast links from slow ones, -it is not able to tell congested links apart from -unused ones, it is not able to distinguish point-to-point -links from broadcast ones. -Improving the link evaluation metrics without becoming -dependent from the specific link-level technology is however -a challenge. Exploring the role of delay, delay jitters, information -coming from the data plane (for instance in 802.11 data packets are -sent at different link speeds depending on the actual destination -and not at the base speed used for broadcast) can yield results -leading to improved metrics. - -h3. Improving multi-radio strategy - -In presence of multiple (wireless and wired) interfaces -the present strategies for interface selection in Batman are -based on simple and non-general heuristics, with the -consequence that very often sub-optimal decisions are taken. -To improve these strategies the following fundamental points need -attention and solutions: -a) Capability to differentiate between different MAC/PHY layers -(e.g., a reliable 1Gbit/s optical link from WiFi, or also a -reliable point-to-point WiFi bridge from a generic multi-point -WiFi interface). -b) Metrics and algorithms for iteratively improving the topology -based on the above information. - -h3. Improving Broadcast communications - -Some applications, specially related to network management like -????, or to services publish/subscribe models, require efficient -and reliable broadcast/multicast (IP layer) communications, which -are however always mapped onto layer 2 broadcast packets. -Presently batman transmits these packets 3 times, with a large overhead -and still no guarantee of delivery. -Many solutions can be studied, starting from intelligent re-broadcast -to multiple-unicast flooding. - -h3. Improving Multicast communications - -(partly started, there - is a concept and a partial implementation) -Interacts with the point above ... PIM Sparse/Dense mode can be -analyzed and extended to wireless networks (PIM per-se cannot -work on wireless interfaces). - -h3. Define a Neighbor discovery independent protocol - -(partly started - ELP. There is a partial concept and partial implementation) + +h2. Documentation & Performance evaluation + +* DHT / DAT +* B.A.T.M.A.N. V - ELP / OGM, half duplex vs full duplex +* Multi-radio +* Multicast flooding +* batman packet format documentation, flags, chachacha +* TT + + + +h2. Extending the protocol + +* IPv6 gateway enhancements +* B.A.T.M.A.N. V future: +** RIP +** unicast OGM + + +h2. fancy stuff + +* anycast +* multicast over DHT +* dynamic OGM interval + +

h3. Fast dead link detection or Fast link switching