Transcript 1xEV-DO and WiMAX: THE IMPACT OF OFDM

U.S. Cellular® Packet data
Roaming and LBS overview
Nars Haran
Advanced Technology & Strategy
All Rights Reserved © 2006
Agenda
Packet Data Roaming Status overview
LBS solution status overview
Issues identified
LBS Roaming Challenges
Different Roaming scenarios
LBS Roaming Proposal
© 2006
USCellular Confidential
7/8/2015
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Packet Data Roaming Status
Support 1xRTT network; EVDO/Rev A development in
progress.
Support both Simple IP and Mobile IP
Simple IP over L2TP for Simple IP Roaming
Support Data Roaming connectivity through a CRX provider
Support BREW, MMS, PTT, RIM and PCMCIA cards
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USCellular Confidential
7/8/2015
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Simple IP data Roaming using
L2TP
USCC Network
Visited Operator
DNS server , Subscriber IP
assigned by Home Network
PDSN
PCF
CRX network
L2TP Tunnel for user data
LAC/
PDSN
LNS
PCF
RADIUS messages
BAAA
VAAA
HAAA
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USCellular Confidential
7/8/2015
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Mobile IP data Roaming solution
DNS
assignment?
IP-IP
Tunnel for
Data
BAAA
HA
CRX
Network
HAAA
VAAA
Visited
Network
Home
Network
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PDSN/FA
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7/8/2015
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USCC Location Based Solution overview
LBS using User plane architecture based on Qualcomm’s
V1/V2 solution
Support for A-GPS, AFLT and hybrid mode of location
determination
Support “Trusted” model with future plans for “Un-trusted”
Support following LBS scenarios:
Single location fix (“where am I”, “restaurant finder”)
Multiple location fixes (Driving directions)
Peer-to-peer single location fix (Find a friend)
Peer-to-peer Multiple location fixes (Child tracker / Geo fencing)
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Issues Identified
User plane BSA requires unique combination of SID/NID/
BASEID.
Due to limitations of number of base stations in a switch, the
BASE-IDs are repeated within a SID/NID
Segregating the network with multiple SID/NIDs causes the
PING-PONG issue due to dormant re-registration along the
border area – significant impact to “Push-to-Talk” and Blackberry type “always on” services.
Additional parameters viz., PN-OFFSET , Cell Lat/long is
used to select the correct BSA entry.
© 2006
USCellular Confidential
7/8/2015
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Why LBS Roaming is important?
Roaming is an inherent feature of location based applications
because they (viz., “Where am I”, restaurant finder, driving
directions etc) are more often than not used in unfamiliar
places away from the home area of the user
Powerful applications such as tracking a Child is expected to
work anywhere
Inconsistent customer experience on LBS while the Data
roaming in place
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7/8/2015
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LBS Roaming Challenges
Pre-standard Implementations
Qualcomm’s gpsone solution
Proprietary solutions
Maintenance & Sharing of sensitive Information (BSA)
Heterogeneous Architectures
User Plane vs. Control Plane
Trusted vs. Un-trusted implementation
Current Roaming solutions assume identical
architectures between Roaming partners.
not there yet
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USCellular Confidential
7/8/2015
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Different Roaming scenarios
Usecase 1
Visited Network with
compatible
LBS solution
Home Network with
an LBS solution
Usecase 2
Usecase 3
Visited Network with
NO LBS solution
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USCellular Confidential
Visited Network with
Proprietary / incompatible
LBS solution
7/8/2015
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Incompatibilities within various scenarios..
Within User Plane architecture
Variation due to Trusted and Un-trusted implementation
(ex.) MPC/PS not present
Accessing visited PDEs
Between Different architectures (Control Plane/ Proprietary)
Cannot inter work
Network with no LBS solution
No network elements
How does the Mobile Node know where it is
roaming to choose appropriate solution?
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Assumptions & Requirements for LBS User
plane Roaming
1.
LBS should be treated as part of Data services (viz., MMS, PTT etc)
2.
User Plane Base station Almanac with unique entries should be made
available from the visited network.
3.
Base Station Almanac keys should be unique combination of SID, NID ,
BASEID , PN OFFSET and other required parameters
4.
Roaming Mobile Node should pass those parameters to the Position
Determining Entity (PDE).
5.
The Security and Privacy control should lie with the home network and
the targeted user
© 2006
USCellular Confidential
7/8/2015
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USCC Proposed Solution for all scenarios
Visited network
with Compatible
LBS solution
Home
Network
BSA lookup
table
SID-NID1 - BSA1
SID-NID2 - BSA2
SID-NID2 - PDE3
Default - 3rd party
M
P
P
C
D
E
M
P
C
P
D
E
3rd party BSA lookup
provider
Usecase 2
Usecase 3
Visited Network with
Proprietary / incompatible
LBS solution
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USCellular Confidential
Visited Network with
NO LBS solution
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Options for User plane LBS Roaming
Per Standards: Home network and visited network support
similar architecture with conforming network elements.
- Both networks support similar protocol and
inter work
Using visiting BSA loaded in the Home PDE
- Carrier Partners share their BSAs.
Using the visited BSA through a 3rd Party broker PDE
- A trusted 3rd party can maintain the BSAs (viz., CRX
provider, PDE provider etc)
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USCellular Confidential
7/8/2015
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Advantages of the proposed options
1.
Location Based Service is treated as any other data service
– meaning that the visited network is mainly used as access
network.
2.
Visited network only allow access to their existing BSA
information through one of the options of their choice.
3.
Subscriber Privacy is squarely under the control of the
Home network.
4.
Visited network is not forced to install new network elements
to support LBS Roaming, if they decided not to have LBS or
having their own proprietary solution.
© 2006
USCellular Confidential
7/8/2015
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Thank You !!
All Rights Reserved © 2006