Network Infra. Lab.

1
The 66th IETF Meeting
IP Deployment over WiBro
11th July, 2006
Sang-Eon Kim Eun Kyoung Paik Jong Sam Jin

• Network Infra. Lab.

2
WiBro Specification

• Major System Parameters
• Duplexing TDD
• Multiple Access OFDMA
• Channel bandwidth 10 MHz

• Radio Access Requirement
• Frequency Reuse Factor 1
• Mobility 60Km/h
• Service Coverage 1km
• Spectral Efficiency (sector)
• Max. DL/UL 6 / 2 bps/Hz/cell
• Aver. DL/UL 2 / 1 bps/Hz/cell
• Handover 150ms
• Throughput (user)
• Max. DL/UL 3 / 1 Mbps
• Min. DL/UL 512 / 128 Kbps
• Frequency Allocation

3
WiBro Architecture
DNS Domain Name Server
HA (IPv6) Home Agent
AAA Authentication, Authorization, Accounting
SNMP, FTP
IP Network
Internet
PE
PE
I Reference Point
ACR Access Control Router
Aggregation Swtich
A Reference point
RAS Remote Access Station
U Reference point
MS Mobile Station
4
IP over WiBro
Convergence Sublayer Bearer Control Management
IPv4 ? ? ?
IPv6 Bearer ?
IPv6 Control ?
IPv6 Management ?
IPv6 Bearer/Control ? ?
IPv6 Control/Management ? ?
IPv6 all ? ? ?
IEEE 802.16
IEEE 802.16/IETF
5
IPv4/IPv6 Bearer
48 bits Variable option
Generic MAC Header Payload CRC
Packet CS Function
CS Type Convergence Sublayer
101 Packet, IPv6
105 Packet, IPv6 over IEEE 802.3/Ethernet
107 Packet, IPv6 over 802.3/IEEE 802.1Q VLAN

• Classification of the higher-layer protocol PDU
  into the appropriate connection
• Suppression of payload header information
  (optional)
• Delivery of the resulting CS PDU to the MAC SAP
  associated with the service flow for transport to
  the peer MAC SAP
• Receipt of the CS PDU from the peer MAC SAP
• Rebuilding of any suppressed payload header
  information (optional)

6
Protocol Stack at U
WiBro
IPv4 IPv6 IPv6 IPv6
IPv4 IPv6 802.3 802.3/VLAN
IEEE 802.16 IEEE 802.16 IEEE 802.16 IEEE 802.16
7
Technical Issues

• Network Architecture
• RRC function in RAS (distributed control) or ACR
  (centralized control)
• Broadcast and multicast for control
• ARP in IPv4, Neighbor Discovery in IPv6
• Bandwidth fluctuation in cell coverage
• QoS
• DiffServ and 5 class of IEEE802.16 (UGS, RT-PS,
  ERT-PS, NRT-PS, BE)
• QoS Control protocol COPS, Diameter, SNMP,

8
Technical Issues

• Performance
• Wireless TCP vs Wired TCP
• New RTO algorithm require.
• Mobility
• Mobile IPv6 and more
• AAA
• Diameter, RADIUS,