History
 Routing in 802.11s
 HWMP
 Reactive/Proactive Routing
 Hybrid Routing
 RA-OLSR
 Summery


Drafts
› Draft D0.01: March, 2006 (First Draft)
› Draft D1.0: Dec, 2006
› Draft D1.06: July, 2007

Necessary HWMP routing
› Reactive Routing
› Proactive Routing

Optional RA-OLSR
Based on MAC address.
 Uses radio-aware routing metric.
 Unicast, Multicast and Boradcast.
 Path Selection vs. routing.
 Single/Multiple radio devices.

Extension of 4-address frame.
 MAC layer is amended.
 Physical Layer stays intact.
 Compatible with other layers.
 Mesh security is based on 802.11i.

Foundation: Adaptation of RM-AODV
 Default routing protocol for IEEE 802.11s
 Reactive/proactive routing components.
 Used in IEEE 802.11s because

› Mobile Nodes
› Static Nodes
Definition
 Based on AODV and DSR
 MAC-LAYER and RA-Metric
 RREQ, RREP, RERR messages.

Def: Maintain routes to all destinations
 Why Proactive routing?
 Registration/Non-registration Modes

RANN messages
 Nodes have path to root
 Root has no information about children

Each node has registers itself to the root.
 Nodes have Path to the root
 Root has list of all nodes inside network.

Precondition for Hybrid Routing
 How does it work?

Optional proactive routing protocol of
the emerging IEEE 802.11s framework.
 Adaptation of OLSR
 Routing Metric: Radio-Aware
 Use of Mac instead of IP
 Why RA-OLSR?

Multi-Point Relays Selection Criteria
 Hello Messages
 Advantages
 Disadvantages

802.11s is a standard for WMN
 Uses a Hybrid Routing
 Reactive/Proactive/RA-OLSR
 It’s NOT complete yet.

Questions