Transcript spatial-telephony-00mar

IP Telephony
Spatial Location
Nortel Solution
By: Mo Zonoun
IP Telephony Environment
• A typical IP telephony environment consists of LANs
connected together with gateways, routers, servers.
• Endpoint devices (telephone, workstation) are distributed all
over at different locations, buildings, rooms.
• Users may have wireless devices or wired to the network at
any location to the LAN, and device location changes
dynamically.
• The topology of the network changes as gateways, routers,
servers and endpoint devices are moved around.
• There is no reference point between endpoint devices and
their geographical locations.
Mo Zonoun
Example of IP Telephony Network Topology
First floor –bldg a
802.3
Old
Access
Point
fifth floor –bldg a
New
Access
Point
bldg c
2nd floor –bldg b
802.11
Mo Zonoun
Nortel’s Solution
• Nortel’s spatial location solution establishes a reference
point between the IP Telephony devices and their
geographical location.
• Provides accurate, secure and trusted location information.
• Works with all the current telephone and computer devices
regardless of their connectivity to the network
• Works across all technologies, service provider and
jurisdictions.
• Cheap and easy to implement.
• Offers variety of options for the industry to choose and to
standardize
• Complies with all the current E911 regulatory requirements.
Mo Zonoun
Nortel’s Solution Continue…
Nortel’s solution provides capability for identifying the
location of endpoint device within an IP or LAN
environment. The system consist of:
— location information transmitter
— location information receiver
— supporting protocols.
Mo Zonoun
Nortel’s Solution Continue …
Location Info Transmitter
• A stationary device - installed at various locations (offices,
hotels and homes) similar to the smoke alarm detectors.
• When activated (e.g. by 9-1-1 calls), transmits a unique preprogrammed position code (x, y, z) which can be translated
to address, building, floor or room numbers.
• The x,y,z code may consist of a GPS (x,y), longitudelatitude, plus elevation (floor) for three dimensional space
coverage.
• The position code (administered by a regulatory agency) is
transmitted via MF tones, PRBS, radio, ultra-red, low power
microwave, electrical power or others.
• Multiple transmitters with varying codes can be installed at
close proximities to provide more accurate space coverage,
as required.
Mo Zonoun
Nortel’s Solution Continue …
Location Info Receiver
• Are installed on the telephones/computers. For MF tone or
PRBS based system, handset receiver or computer
microphone provides this function.
• When enabled (e.g. by 9-1-1 call via a spatial location
server), it receives the location code from the transmitter.
• Embeds the location code into the telephony signal or data
stream, for processing (by the spatial location server).
• The information is processed by the spatial location server
and then is routed to the destination (e.g. 9-1-1 PSAP via the
telephone company or ISP).
• The location information is then retrieved from the signals
and will be processed accordingly.
Mo Zonoun
Information Flow for 9-1-1 Calls
location
Server
Transmitter
IPTel
device
Telco or
ISP
E911 Call
Activate Transmitter
Activate Receiver
Broadcast location Code
Embebed location Code
De-activate Transmitter
E911 call
With location & call
back number
E911 call establishment
Mo Zonoun