How to Geo Locate a user in WCDMA

[electron]

Hi every one ,


Does any body know how to geo-locate users in WCDMA? As you may know there are some tools which based on traces and measurements can approximately geo-locate users and locate the critical events (drops,failures,..) in map based on such capability any documents or explanation about the common algorithms would be appreciated .


Cheers

[khurrambilal01]

Hi every one ,Does any body know how to geo-locate users in WCDMA? As you may know there are some tools which based on traces and measurements can approximately geo-locate users and locate the critical events (drops,failures,..) in map based on such capability any documents or explanation about the common algorithms would be appreciated .CheersYes I am working with Huawei equipment and support has provided us with a new tool Huawei has developed named IDAT, Which is used to locate geographically users on map, It uses the CHR logs.It's Huawei internal tool.

[ManuelBelgrano]

the chapter of this book explained the most common techniques to geolocate users in Mobile Networks. I hope it helps you.
http://www.4shared.com/zip/WUhUz9hD/chapter_14_Wireless_Geolocatio.html
Reps and thanks are appreciated.

[electron]

Well i am actually looking for algorithms that how they are finding user location with which information in trace?


Thanks
Yes I am working with Huawei equipment and support has provided us with a new tool Huawei has developed named IDAT, Which is used to locate geographically users on map, It uses the CHR logs.It's Huawei internal tool.

[ltecity]

Is there any specific tool in E// system to find user location.

[xcatas]

Hi every one ,


Does any body know how to geo-locate users in WCDMA? As you may know there are some tools which based on traces and measurements can approximately geo-locate users and locate the critical events (drops,failures,..) in map based on such capability any documents or explanation about the common algorithms would be appreciated .


Cheers

In E// RAN, there are some methods (algorithms) for RNC to geo-locate UE, such as:

- UE-based A-GPS (Assisted GPS) : measurement n calculations done in UE
- RTT (Round Trip Time) : meas done in the RBS and the UE, ordered by RNC
- using Iupc interface : interface between RNC and Stand-Alone Servicing Mobile Location Center (SAS node) for positioning control. meas calculation of A-GPS and RTT will be done in this SAS node

for more information about these methods, take a look at E// positioning documents (attached)

we could know the UE location by recording trace file using OSS-RC
record some events required, like positioning events (event ID:429)
(caution: record only required events, as GPEH recording would increase RNC MP Load)

after that, we could copy traces files then use parsing tool that can understand the GPEH binary format
it will took that events and event parameters required such as positioning and performance events.
or we could parse the GPEH using parser in OSS-RC into ASCII or tab delimited file (but remember it may increase OSS-RC processors and memories load)


Is there any specific tool in E// system to find user location.

as described above, we could find users location by recording GPEH (and knowing their IMSI also, of course) and parse them using parser tools

- E// OSS-RC, to record GPEH traces. event required :
INTERNAL_UE_POSITIONING_QOS (Event ID : 429). with event parameters, such as :
EVENT_PARAM_IMSI
EVENT_PARAM_LATITUDE_SIGN
EVENT_PARAM_LATITUDE
EVENT_PARAM_LONGITUDE_SIGN
EVENT_PARAM_LONGITUDE

- E// RAN Analyzer, to parse GPEH file in your PC (or you could use non E/// tools like aexio, tems vis, etc...)

for more information to convert parameters values into common units, take a look at E// GPEH description document (attached)

from GPEH positioning and performance events, we can do commercial things, e.g VIP monitoring service (so operator could maintain their network performance, especially for locations and road where the VIPs are camped)

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[hshai]

Dear experts,

Does any one known the algorithm to plot UE Position on map base on GPEH E******* (RRC_Measurement_Report and NBAP_radio_link_setup_Request)?

thanks!