New Sales Orientation 197

1
Mobile Information Infrastructure (MII) Project
Overview
2
MII Concept of Operations
3
CONOPS Introduction

• Mission
• Provide interoperable broadband video and
  multimedia capabilities across heterogeneous
  networks (wired/wireless)
• Technology
• Portable Computer fast with wireless access
• High speed wireless network
• Mobile network routing (capable of supporting
  roaming)
• Common application environment
• Service discovery protocol (identify local
  resources)
• Functional Capabilities
• Wireless LAN connectivity between Access Points
  and mobile nodes
• Connectivity between fixed-site server/hosts and
  Access Points
• Multimedia interface to users at mobile nodes
• End-to-end connectivity with QoS mechanisms

4
CONOPS Environment

• Mission Environment
• Indoors (e.g. office, department store, factory
  floor)
• Outdoors (e.g. campus)
• Support both clear and blocked line-of-sight
  conditions

5
CONOPS System Configuration
100 Mbps Ethernet
Video Source
Foreign Networks
11 Mbps Wireless LAN
Access Point
Video Source
Router
Access Point
DVD
100 Mbps Ethernet
Home Network
Access Point
11 Mbps Wireless LAN
Home Agent
Router
Access Point
Internet
11 Mbps Wireless LAN
Enterprise Network
Access Point
6
CONOPS QoS Software Suite
7
CONOPS Suite (Contd)

• Protocols
• Application Protocols
• Audio, video, email, web based, etc.
• Mobility Support Protocols
• IEEE 802.11, DHCP, SLP, Mobile IP, IGMP, etc.
• Provide services that support association,
  authentication, roaming, discovery of network
  services, etc.
• QoS Support Protocols
• SBM, RSVP, etc.
• Use mechanisms that provide for packet
  classification, flow separation, packet
  scheduling, and packet dropping.

8
CONOPS Roaming, part 1

• Roaming between APs within single IP subnet
• IP address doesnt change
• FCC has allocated 11 channels for 802.11 MAC,
  but only three (1, 6, and 11) can be used
  concurrently. Thus, APs in close proximity are
  each assigned one of these 3 frequencies.
• Mobile stations detect weak signal from their AP
  as they enter the coverage area of another AP.
  They search the other channels for a new AP,
  disassociate from the old AP, and associate with
  the new one.
• Multimedia transmissions, including video data,
  are sent using multicast service. IGMP is used
  by mobile stations to join and leave multicast
  groups.
• As mobile station associates with new AP, IGMP
  snooping is used to assign mobile station to an
  equivalent multicast group containing the (video)
  transmission of interest.
• Routers also employ IGMP snooping to identify
  multicast subscribers on a given IP subnet.

9
CONOPS Roaming, part 2

• Roaming between APs on different IP subnets
• Subnet prefix of mobiles IP address not
  sufficient to route packets to correct IP subnet
  without changing routing tables
• As mobile associates with new AP, it acquires a
  new IP address through DHCP server or Mobile IP
  Foreign Agent.
• Home Agents and Foreign Agents are entities that
  coordinate the forwarding of data packets to a
  mobile station as it roams across IP subnets.

10
CONOPS QoS Mechanisms

• Quality of Service Mechanisms on MII
• Packet Classification
• Flow separation into separate queues
• Traffic shaping
• Traffic policing
• Packet scheduling
• Resource reservation
• Admission control
• Two Approaches
• Integrated Services (IntServ)
• Differentiated Services (DiffServ)
• DiffServ used on MII

11
CONOPS QoS (Contd)

• Differentiated Services
• Aggregates groups of users and applications into
  appropriate service classes
• Classes of service
• Assured Forwarding - nodes allocate forwarding
  resources, buffer space, and bandwidth for given
  service classes
• Expedited Forwarding -
• provides low loss, low latency, low delay jitter,
  and assured bandwidth end-to-end service
• nodes are configured so that aggregate traffic
  has well-defined minimum departure rate
• aggregate traffic is conditioned so that arrival
  rate at a node is less than the nodes minimum
  departure rate
• Best Effort
• Less Than Best Effort

12
CONOPS Operational Scenarios

• Corporate Campus
• Accessing calendar, email, intranet/internet
• Retrieving files, video clips during a meeting
• Reserving conference rooms, finding printers
• Airplane Mechanic
• On-site parts/assembly database access
• Access video clip describing part
  assembly/installation
• Hospital
• Doctor is able to access patients records,
  latest lab reports
• View X-Ray images, segments from ultrasound
  videos and fiber-optic cameras

13
MII System Requirements Summary
14
System Requirements Summary

• The MII system shall
• Provide a one-way, multimedia delivery service
  (including video) from fixed hosts to wireless
  hosts using IETF DiffServ QoS mechanisms
• Quantify the improvement associated with
  switching on various QoS features.
• Support roaming among wireless nodes, allowing
  uninterrupted program viewing (per available
  bandwidth in new area)
• Deliver packets to wireless nodes within
  constraints of defined metrics
• Provide API to enable selection of programming or
  services of interest

15
Requirements Summary (Contd)

• The MII system shall
• Allow operation with APs connected either to the
  same or to different IP subnets
• Use an extensible architecture, allowing for
  future capabilities such as two-way video
  conferecing
• Use mobile hosts with two-way audio, video, and
  data transfer (e.g. file transfer) capabilities
• Provide a mechanism for managing network
  components

16
MII Hardware Platform
17
Harris 11Mb Radio Network Card Wireless
Network Bridge (DAP)