Background:
(1) China Unicom has not deployed SUPL server till now and will not in near future.
(2) OMH should not rely on any non-commercial SUPL server such as google's SUPL server.
QC suggest OEM for OMH or CU use standalone GPS+XTRA solution.
Please follow this:
1.NV setting on modem side
NV 1920 = 7 //enabling standalone GPS and user plane AGPS.
NV 4707 = 1 //MO GPS application uses User plane AGPS.
NV 3758 = 0 //connection to a SUPL server is non security(TLS) mechanism
NV4627(gpsOneXTRA Feature Enable/Disable) =1 //enable XTRA feature
NV4631(gpsOneXTRA Auto Download Enabled) =1 //enable XTRA data auto download
NV4927(gpsOneXTRA Time Injection Enable/Disable) =1 //enable SNTP time auto download
NV4628(gpsOneXTRA Download Interval,1-168 hours) = 84 //configure XTRA auto download Interval as 3day or OEM dependent.
Please check 80-VG439 for detailed info about these NVs.
2. Android settings
OEM also need disable AGPS on android framework so that android application will not trigger any A-GPS session.
In frameworks/base/packages/SettingsProvider/res/values/defaults.xml, modify bool name "assisted_gps_enabled" to
false,this modification like below:
<bool name="assisted_gps_enabled">false</bool>
No comments:
Post a Comment