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HUAWEI MC509 CDMA LGA Module
AT Command Interface Specification
GPS Commands
Issue 01 (2011-08-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
135
2: speed optimal, mobile tries to obtain position fixes in such a way that TTF is
minimal, depending upon the fix rate and initial uncertainties, MS decides
whether to attempt MS-based fix or MS-assisted fix。In CDMA, MS-based and
download ephemeris from AGPS server is preferred, if failed then MS-assisted.
In UMTS, it‟s just MS-based.
3: accuracy optimal, mobiles tries to obtain position fixes with best accuracy. In
CDMA, MS-Assisted mode and download ephemeris from AGPS server is
preferred, MS-based mode uses only if MS-assisted fix fails. In UMTS, it‟s just
MS-assisted.
4: data optimal, MS will try to minimize the amount of data exchanged over the
network. In CDMA, MS-based and download ephemeris from AGPS server is a
preferred mode over MS-assisted mode, and minimum AGPS server/network
access is allowed. In UMTS, it‟s just standalone.
5: MS-based only, all position fixes provided to PD client are calculated by MS. If
communication with network fails, the session will fallback to standalone.
6: gpsOneXTRA, provide enhanced standalone performance。It eliminates the
need to demodulate the GPS signal for ephemeris, almanac, iono, UTC, or
health.
7: Cell-ID, the user position will be fixed by the cell which the MS in.
<err>: error description or error code
Error code
Error Description
4
Operation not supported
276
GPS function disabled
277
Standalone disabled
278
AGPS disabled
279
gpsOneXTRA disabled
280
Cell-ID disabled
281
Invalid parameter
283
PD session is ongoing
285
Too many parameters