1. A Wireless Two-Way
Messaging
System
Pigeon:

2. Wireless communication is the transfer of
information over a distance without the use
of electrical conductors or wires.
IS WIRELESS
COMMUNICATION
TYPES OF WIRELESS
COMMUNICATION

3. Packet Switching

4. Circuit Switched Data

5. Two Way
Messaging
System
Data
Network
Public
Switched
Telephone
Network
Cellular
Network
Mobility
Base Station
Bidirectionality
disconnection
Asymmetry

6. USER
AGENT
R
USER
AGENT
S
Pigeon
control
fuctions
Location tracking
forwarding/filtering
Address and message
expansion message
status query
Originating
message code
Full
text
reply
Full text
reply
Flexible message
in message
storage
encoding

7. User Agent
User AgentUser Agent
Interworking
Function
Batch Server
Batch Server
Services
Services
Distribution
Server
Transaction
Server
Messaging
Coordinator

8. One way paging and Two way paging
Hello
Call is made
to the pager
service
Operator takes
message and pager
number
Base station transmits
message to the pager
Pager receives message

9. Base transeiver
Connects subsciber
to cellular network
Base Station

10. Care for lunch emphasize
{now}?
Sure I am busy
McDonalds/
Taco Bell
Choice
component
Reply component
choices
Wireless Media

11. User (Pager) User Agent
Proxy
Location
Status
User Agent doesn’t migrate as
subscribers roam and is always

12. Addresses
References To….
Modifiers
uplink
Eg: Lunch
Dinner 5 0 0

13. Uplink /downlink data
received correctly
Tracking &Message
status verifying
New mail!!!! User to
user communication
Reliable
Delivery

14. Group
addressing
Ad hoc group

15. Personalizable
with the user agent
Address Book
Message List

16. New location of
pager found
Batch server

17. tt
closed
open
Transaction
Manager
Recipient
State
Conversation
Manager
Recipient
State
Recipient
State
Recipient
State
Transaction Server
received
sent
done
replied

18. Distribution
server
Text to
voice
converter
Else…

19. Applications of Pigeon
Value added services
User Agent
…thus saves
resources on
air interface