mobile location and the transformed network october 2003 martin dawson nortel networks mlc architect...
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Mobile Locationand the transformed network
October 2003Martin DawsonNortel Networks MLC [email protected]
Mobile Location – Transformed Network - 2Nortel Networks Proprietary
Nortel Networks at a Glance…Our history…
Over 100 years at the forefront of major technological innovations in telecom
Our operations…
Serving more than 150 countries
Our people…
Approximately 36K employees worldwide
Our financials…
2002 Revenues of US$10.6B
2002 R&D expenditure of US$2.2B
Our Customers• Service providers
– Public network carriers
– Wireless operators
– Multi-service operators (cable companies)
• Enterprises– Small, medium and large businesses
– Financial institutions
– Educational institutions
– Hospitality industry
– Healthcare facilities
– Public institutions and government agencies
– Other industries
Mobile Location – Transformed Network - 4Nortel Networks Proprietary
Our OrganizationAddressing the needs of multiple markets and customers
Leveraging technology portfolio across various market segments
Common technological and networking expertise, operations and customer service
WirelessNetworks
EnterpriseNetworks
OpticalNetworks
WirelineNetworks
$2.3B$2.3B
$4.2B$4.2B
$2.6B$2.6B
$1.5B$1.5B 2002 Revenues (US$)
Mobile Location – Transformed Network - 5Nortel Networks Proprietary
E911 Driven Technology DevelopmentUS Carrier Network Location
Technology
Alltel CDMA AGPS
AT&T Wireless GSMTDMAUMTS
UTDOA+
UTDOA+
GPS
Cingular Wireless GSMTDMA
UTDOA+
UTDOA+
Nextel iDEN* GPS
Quest CDMA AGPS
Sprint PCS CDMA AGPS
Verizon Wireless CDMA AGPS
T-Mobile GSM UTDOA+
* iDEN uses network assisted, MS-based, GPS positioning. CDMA does MS-assisted+UTDOA not necessarily expected to get use outside USA – due to cost of LMUs.
Dominant technologies have emerged as: A-GPSfor CDMA* and UTDOAfor GSM
Dominant technologies have emerged as: A-GPSfor CDMA* and UTDOAfor GSM
Mobile Location – Transformed Network - 6Nortel Networks Proprietary
MSC
GMLC
SAS
PSTN
PSAP
Dialup
ESME/ALI
IP
RNC
NodeB
WARN
1. 911
6.RRC
8a.SLR
8b. Call setup
9. Query Location
10. ESPOSREQ
4.PCAPreq
5.PCAPresp
11. esposreq
12. Provide Location
Standards based UMTSEmergency Services Call walkthroughUtilising A-GPS
3.LRC7.LRCresp
2.Emergency Call Invoke
Mobile Location – Transformed Network - 7Nortel Networks Proprietary
MSCGMLC SMLC
IP
BSC
BTS
4. SRIresponse
3. SRI
Value added service performing MT-LR on GSM using UTDOA for positioning.
BTS
BTS
HLR
ApplicationServer
Internet
2.Location Request
5. PSL
6. Perform LocationRequest
1.Application Request
12. Perform LocationResponse
13. PSLResponse
14. Location Response
15. Application Response
9. Get channel info
LMU
LMU
LMU
10. InitiateMeasurements
11. ProvideMeasurements
Mobile Location – Transformed Network - 8Nortel Networks Proprietary
Optical
Packet
Security
Mobility
QoS
IP VPN
SubscriberControl
Access
LAN
Broadband
Transformed Network Architecture
ISV Apps
Applications
MediaVoice
ServicesServiceEdge Policy
ContentSwitching
InteractiveMultimedia
Mobile Location – Transformed Network - 9Nortel Networks Proprietary
GSM
GMLCGMLC
LhLg
HLRHLRGMLCGMLC
Home PLMN
Le LhLocationApplications
LocationApplications
SMLCSMLCLMULMU
LsUm
LMULMU
SMLCSMLC
Abis
Lb
Lp LocationApplications
LocationApplications
Le
Lg
Serving PLMN
Lh
MSCVLR
MSCVLRBSCBSCBTSBTS
MS
Abis A
HLRHLR
D
Where does location fit in the transformed network?LCS – Network architecture elements
LCS support requires two new network elements*
SMLCSMLC
GMLCGMLC
* Note IS-95 networks have same principle – corresponding network elements are the MPC and the PDE
Mobile Location – Transformed Network - 10Nortel Networks Proprietary
Where does location fit in the transformed network?Location – Two key pieces
• Gateway Location Center– Application interface for location
services– Application authentication– Privacy checking– Access independent– Examples – GMLC, MPC
• Serving Location Center– Determines the location– Talks to access network and user
device– Understands the access it serves– Examples – SMLC, PDE
GatewayLocation Center
GatewayLocation Center
ServingLocation Center
ServingLocation Center
Mobile Location – Transformed Network - 11Nortel Networks Proprietary
Location – Place in the transformed network
• Gateway Location Center– Application interface for location
services– Application authentication– Privacy checking– Access independent– Examples – GMLC, MPC
• Serving Location Center– Determines the location– Talks to access network and user
device– Understands the access it serves– Examples – SMLC, PDE
GatewayLocation Center
GatewayLocation Center
ServingLocation Center
ServingLocation Center
GatewayLocation Center
GatewayLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
ServingLocation Center
•The Gateway Location Center provides the application layer interface•The Serving Location Centers provide the adaptation and positioning on a per access network basis•The result is a uniform service provision independent of access method
Mobile Location – Transformed Network - 12Nortel Networks Proprietary
VoIPCallServer
VoIPCallServer
PSTNGateway
PSTNGateway
Router+
L2
Router+
L2
AccessSLCI
AccessSLCI
Lg’
e.g. VoIP E911 Application
GMLCGMLC ALI
S/RS/R
E2 I/f – ALI sees same infrastructure
PSAP sees same infrastructure
Requires:•Equivalent Lg interface semantics
between CS and GMLC•Reuse ESRK tagging
•Ability to route update requests from GMLC to CS
•Ability to route location requests from CS to access network
•SMLC equivalent (SLCI) in access
MSCMSCRANRAN
SMLCSMLC
Lg
