Junghoon%20Jee,%20ETRI

1
IP over 802.16 Problem Statement
Updatedraft-jee-16ng-ps-goals

• Junghoon Jee, ETRI

Maximilian Riegel Syam Madanapalli Gabriel
Montenegro Soohong Daniel Park Jeff Mandin
Siemens Samsung Microsoft Samsung Runcom
2
Terminology

• SS (Subscriber Station)
• An end-user equipment that provides connectivity
  to IEEE 802.16 based network.
• BS (Base Station)
• A layer 2 entity providing connectivity,
  management, and control of the subscriber
  station.
• IP Gateway
• A layer 3 entity that acts as a first-hop default
  router for SSs.
• IP Subnet
• Topological area that uses the same address
  prefix where that prefix is not further
  subdivided except into individual addresses.
• Link
• Topological area bounded by routers which
  decrement the IPv4 TTL or IPv6 Hop Limit when
  forwarding the packet.
• Transport Connection
• IEEE 802.16s MAC connection between a SS and BS
  with a specific QoS attributes. Each transport
  connection is identified by an unique identifier
  called connection identifier.

3
IEEE 802.16 PMP Link Layer

• No native bi-directional multicast support
• No direct communication between MS/SSs
• Connection-oriented MAC
• Connections always between MS/SS and BS
• MAC PDUs are transferred according to CID
• 48-bit MAC addresses are not used for
  transmission
• Ethernet CS does not provide Ethernet
  functionality over the air
• Specifies only encapsulation and classification
  of Ethernet Frames for transmission over CIDs

4
16ng Problem Statement

• Distinctive feature of 802.16 link
• No native bi-directional multicast support
• No direct communication between SSs
• Connections always between SS and BS
• 48-bit MAC addresses are not used for
  transmission
• Ethernet CS does not provide the Ethernet-like
  functionality.
• Air resource consumption from the previous
  multicast/broadcast based IPv6 NDP and IPv4 ARP
• Power consumption caused by waking up of dormant
  terminals
• No single mandatory CS on the SS.
• Multilink subnet issues when using IP CS for
  Ethernet-like deployment model.

5
16ng Goals

1. Work on Ethernet CS should provide
   interoperability with existing devices that
   employ Ethernet .
2. Define an enhanced IPv6 NDP under considering
   scarce air resources.
3. Define enhanced IPv4 ARP under considering scarce
   air resources.
4. Reduce the power consumption caused by waking up
   of dormant terminals
5. Resolve the multilink subnet issues when using IP
   CS for Ethernet-like deployment model.
6. Consider the applicability of the previous
   security works like SEND.
7. Do not introduce any new security threats.

6
16ng Goals (2)

• Define the way to negotiate the used convergence
  sublayers.
• Define the feasible IP subnet models depending on
  the CS used.

7
16ng Network Models

• Baseline is how to constitute an IP subnet over
  IEEE 802.16 PMP links.
• Ethernet-like deployment model
• IP subnet consists of one IP Gateway and multiple
  SSs.
• Both IP CS and Ethernet CS are applicable.
• IP CS Need to resolve the multilink subnet
  issues.
• Ethernet CS Based on the bridging function at
  BS.
• 3G-like deployment model
• IP Gateway assigns separate IP subnet prefixes
  for each SS.
• IP CS seems more applicable.
• BS architectural issue
• Physical relationship between BS and IP Gateway.
• Resolution Informational texts on deployment
  model I-D.