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文件名称: SIM7X00 Series_GPS_Application Note_V1.00.pdf

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详细说明：This document presents the AT command of GPS operation and application examples. This document can apply to SIM7X00 series modules, including SIM7600C, SIM7600CE and SIM7500JESIMCom 只MTah Smart machine smart decision Version History Date Version What is new Author 2016-07-071.00 Ncw vcrsion Dongshan. liu coDe This document prcscnts thc at command of gPs opcration and application cxamplcs. This document can apply to SIM7X00 series modules, including SIM7600C, SIM7600CE and SIM7500JE SIM7XOO Series GPS Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision Contents Vcrsion History Se Contents 1. Introduction 1.1.Oⅴ erview 1. 2. GPS Mode introduction 2234445 1.3. gpsoneXTRA Introduction.…… 1.3.1 gps OneXTRA assistance 1.3.2 gps OneXTRA assistance data file content ··· 1.3.3 gps OneXTRA assistance data delivery 455556 1.3. 4 gpsOncXTRA assistance filc sourcc and policy. References 1.5 Terms and abbreviations 2. A-GPS Quick Start- Setting 2.1. Set A-GPS Server Address 2.2. Set Certificate 777 3. Start GPS 3. 1. Start GPS Standalone mode 3.2. Start A-GPS Mode 4. Get GPS PoSition Information 4.1. Standalone mode 4.2 A-GPs Mode 5. Qualcomm gpsoneXTRA Mode 12 5.1. gpsoncXTRA Execute Flow. 12 5.2. gpsoneXTRa Setting…… 5.3. gpsoneXTRAAT Flow 5.4. Vendor Propositional XTRA Execute Flow 13 6.Q&A 14 SIM7XOO Series GPS Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision l。 Introduction 1.1. Overview Customer can get useful information about SIM7X00 GPS/A-GPs functions quickly through this document GPS function could be easily realized by at command interface provided in SIM7X00 module via USB interface SIM7XO0 GPS fcatures e Support S-GPS and A-GPS function o Support glonass function e Support standalone modc, Ms-bascd mode and MS-assistcd mode e Support cold start and hot start e Support a subset of the NMEA-0183 standard o Support Nmea sentences output in NMEa port port O A-GPS supports UP (uscr planc)and CP(control planc)mcthod MS-assisted mode supports single fixed; MS-based mode supports seriate fixed e Support certilicate if necessary Supporting gPS starts automatically when module powers on, it supports standalone mode only 1.2. GPS Mode introduction In MS-assisted mode, when a request for position location is issued, available network information is provided to the location server and assistance is requested from the location server. The location server sends the assistance information to the handset the handset/mobile unit measures the gps observables and provides the gPs measurements along with available network data(that is appropriate for the given air interface technology) to the location server. The location server then calculates the position location and returns results to the requesting entit In Ms-based mode, the assistant data provided by the location server encompasses not only the information rcquircd to assist the handset in mcasuring the satellite signals, but also thc information required to calculate the handsets position. Therefore, rather than providing the gPs measurements and available network data back to the location server, the mobile calculates the location on the handset and passes the result to the requesting entity In standalone mode, the handset demodulates the data directly from the GPS and GLONaSS satellites. This mode has some reduced cold-start sensitivity, and a longer time to first fix as compared to the assisted modes. However, it requires no server interaction and works out of network coverage. GPS is preferred than glONASs, so if GPS has fixed the position, the gnss engine will close glonass, in order to save the power. If customer wants GPS and GloNaSS hybrid, he can first change the mode with AT Command SIM7XOO Series GPs Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision Table 1 GPs mode of operation MS-assisted Server Module Location Server sends aiding data that Send aiding data is valid for the current fix Module sends code phases Code phases Server calculates position Calculate position MS-based Server M odule Location server sends aiding data that Scnd aiding data is valid for the current fix g Module calculates position Calculate position Standalone Server Module Module demodulates data from GPS Demodulates gps and glonass satellite satellile dala Module calculates position Calculate position 1.3. gpsoneXTRA Introduction 1.3.1 gpsOneXTRA assistance It provides enhanced standalone per formance and eliminates the need to demodulate the GPs signal for ephemeris, almanac, iono, UTC, or health Normally requires-144 d Bm or stronger for all s vs in view TTF can be reduced by 18 to 30 sec(or more in harsh signal environments) 1.3.2gpsOneXTRa assistance data file content Current assistance data(ephemeris, almanac, iono, UTC, health) Predict satellite coordinates and clock biases valid for up to 7 days 1.3.3 gpsOneXTRA assistance data delivery Propriety binary file(approximately 40 kB, depending on number of active satellites File transfer via Http SIM7XOO Series GPs Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision Time assistance via SNTP/HTP 1.3.4 gpsOneXTRA assistance file source and policy Qualcomm generated the assistance lile and Qualcomm partner hosted 1. 4 References The present document is based on the following documents SIM7XOO Series AT Command Manual V1.00 1.5 Terms and abbreviations For the purposes of the present document, the following abbreviations appl oat Attention the two-character abbreviation is used to start a command line to be sent from te/dtE tO TA/dCe 0A-GPs Assisted Global positioning systcm aGPs Global positioning system S-GPs Simultaneous Global positioning system SIM7XOO Series GPS Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision 2. A-GPS Quick Start- Setting The purpose of this section is to help to get start with A-GPS setting 2. 1. Set A-GPS Server address UP mcthod is through PS rcgion, so customer must sct A-GPS scrvcr and PDP contcxt profile. The server address is provided by local carrier 9 Set the PDP context profile method AT+CGSOCKCONT=I, 7P","myAPN he first parameter is the profile number of CGSoCKCoNt, and"IP"is the protocol stack type that MMS will use. " myaPN is the asn that will be used for pDP activation, this parameter should be set to Che real aPn string set by the carrier. Following is the Pdp context profile and server URL selling example Set the A-GPS server method AT+ CGPSURI=”111.222.33.3.444:8888” 2. 2. Set Certificate If the gPs server requires certificate, customer must select security mode, and input the certificate. The certificate must be imported into efS by PC tool Select the transport securit AT+CGPSSSL=l The certificate is provided by local carrier SIM7XOO Series GPS Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision 3. Start GPs 3. 1. Start GPS Standalone mode Three methods can start gPs standalone mode 1. AT+CGPS=l, I(or AT+CGPS=l) 2. AT+CGPSCOLD 3. AT+CGPSHOT These commands must be executed after GPS engine switched off. 3. 2. Start A-GPS Mode When using Ms-based mode, mode will transform to standalone mode automatically after getting the ephemeris information from the server. MS-assisted mode is single fixed; MS-based mode is seriate fixed 1. AGPS server which does not support certificate: MS-assisted mode no certificate Set APN Al+CGSOCKCoNT=1, IP",yAPN Set server address AT+CGPSURL-111.222.333.444: 8888 (not support certificate Set security mode AT+CGPSSSL=0 Start GPS AT+CGPS=1 3 at port response+ CAGPSINFO:3122256517,12135328531,135,15052009,012749.0 URC) NMEA port SGPGSV,3,1,10.02,2,135.26,08,1,04523,09,1,180,22,10,33056,2271 response SGPGSV,3,2,10,15,78,281,44,21,22,315,41,24,67,315,47,26,45,225,30*78 SGPGSV,3,3,10,2733,157,29,22,247,46*76 MS-based mode no certificate Set aPn AI+ CGSOCKCONT=1,IP”,”my4PN Set server address AT+CGPSURL=111.222.333.444: 8888 (not support certilicate Set security mode AT+ CGPSSSL=0 Start GPS AT+CGPS=1.2 at command AT+ CGPSINFO g fi position) AT port response+ CGPSINFO:311.393760N212,17665E0611080753580,19.5,0 SIM7XOO Series GPS Application Note v1.00 201607-07 SIMCom 只MTah Smart machine smart decision NMEA port| SGPGSV,3,1,11,02,19,142,20,08,16,045,2109,19,180,22,1041,063,29*7B response SGPGSV,3,2,11,15,77,317,46,18,09,286,31,21,28,315,43,24,73,310,47*7F SGPGSV,3,3,11,26,53,241,31,27,39,158,20,29,30,250,41*45 GPGGa,0139250,3113340070,N,12121.176208,E,1,08,2.9,164.0,M,,*08 GPRMO,0139250,,3113.340070,N,12121.176208,E,4150509,A*61 GPGSA,A,3,08,10,15,18,21,24,26,29,44,2.9,3.3*37 SGPVTG,, T,, M,0.0, N,0.0, K4E 2. AGPS server which supports certificate: MS-assisted use certificate mode Import certificate By PC tool Set APN AT+ CGSOCKCONT=1,"IP”,” maPI Set server address AT+CGPSURL-7111.222.333.444: 8888 (support certificate Set security mode AT+CGPSSSL-1 Start GPS AT+CGPS=1.3 AT port response|+ CAGPSINFO:3122256517,12135328531,135,15052009,0127490 URC) NMEA pot| SGPGSV,3,10.02,2,135.2608,1045,23,091180,2,10,33056,2271 response SGPGSV,3,2,10,1578,28144,21,22,315,41,24.67,315,47,26,45,225,30*78 GPGSV,3,3,10,27,33,157.,29,22,247,46*76 MS-based mode use certificate Import certificate By PC tool Set aPn Ar+ CGSOCKCONT=1,”1P,” myAN Set server address AT+CGPSURL-"111.222.333.444:8888 support certificate) Set security mode AT+CGPSSSL-l Start GPS AT+CGPS=1.2 at command AT+CGPSINFO g fixed position AT port response+ CGPSINFO:3393706N1212,1062:0618.0753580,1950 NMEA port SGPGSV,3,1,1,02,19,142,2008,16,045,21,09,19,180,22,10,41,063,29*7B respon SGPGSV,3,2,11,15,77,317,46,18,09,286,31,21,28,315,43,24,73,310,47*7F GPGS V,3,3,11,26,53,241,31,27,39,158,20,29,30,25041*45 SGPGGA,0139250,3113.340070.N,12121.176208,E,1,08,2.9,164.0,M,*08 SIM7XOO Series GPs Application Note v1.00 201607-07

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