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WIRELESS SOLUTIONS FOR EVERYONE
TECHNICAL SEMINAR SEPTEMBER 2003
GPRS & IP STACK
Philippe de La Bourdonnaye
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MtoM IP Communication over GPRS
GPRS sessions opening at both ends
Necessary dynamic IP@ synchronisation ? or Static IP@ ?
Private IP@ or Public IP@ ?
GPRSNetwork
PacketNetworks
GPRSNetwork
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IP Connectivityfor WISMO & Open AT
WISMO IP Connectivity• Standard WISMO module• IP connectivity implemented within the Open AT
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GPRS & IP with AT# Commands
GPRSNetwork
AT/V.24Low Internet
LayersGPRS GPRS
IP
TCP/UDP
GGSN
Application
AT/V.24
AT# Commands
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GPRS & IP with IP Stack Library
GPRSNetwork
Application
AT/V.24Low Internet
LayersGPRS GPRS
IP
TCP/UDP
GGSN
Open AT
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Integration of IP stack as Open AT applic.• Download into Wavecom module/modems
Autonomous Software• Stack initialisation and parameters restoration from
WISMO EEPROM• To be integrated into standalone equipement
Both GSM and GPRS Compatibilities• IP Stack use on GSM as well• GSM Features during GPRS Sessions: Incoming Calls,
SMS,…
IP Connectivity: Services
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TCP Sockets and UDP Sockets: • transparent asynchronous data transfer between systems• defined by an IP address and a port number• includes Telnet (TCP/23) for Terminal Emulation
FTP (file transfer protocol TCP/20,21): • file transfer between systems
POP3 (Post Office Protocol V3 TCP/110): • allows clients to read and remove email from a mailbox
SMTP (Simple Mail Transfer Protocol TCP/25): • used to deliver email from one system to another
DNS (Domain Name Solving UDP/53)
Protocols Supported
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GSM/GPRS
Example with an Open AT + IP customization:
IP
Internet PCE-mail
AlarmManagement
IP Enhanced Application
FTP Server
File StorageFor Fiscal Purposes
FTP transfer
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Main Firmware Download• AT+WOPEN=0• V640c• AT+CGMR
GPRS class 10 Feature Activated• AT+CGCLASS=“B”
Open AT Feature Activated• AT+WOPEN?
IP Stack Download• V302_V2
AT+WOPEN=1 IP Feature Activated
• AT#VVERSION
AT+WIMEI?
First Steps & First Checks
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AT+WIND? AT+CPIN?
AT+WGPRS=0,0;+CMEE=1;&W;+WMIR AT+CFUN=1
AT+CPIN? AT+CREG? AT+CGREG?
AT#VALL AT# parameters are automatically stored in Flash PROM
• No AT&W needed• AT#DELFLASH : come back to default values after the next reset
Starting with GPRS Attachment
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AT#VGPRS AT#APNSERV=“orange.fr” AT#APNUN=“orange” AT#APNPW=“orange” AT#GPRSMODE=1
+WIND: 4 AT#CONNECTIONSTART (AT#CONNECTIONSTOP) AT#VSTATE AT#DISPLAYIP
AT#VDNS AT#DNSSERV1=“0.0.0.0” AT#DNSSERV2=“aaa.bbb.ccc.ddd”
Starting with GPRS Session
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AT#VPOP3 AT#VSMTP AT#POP3HEADERMODE=1 AT#POP3PORT=110 AT#POP3PW="fbewm03" AT#POP3SERV="pop.tiscali.fr" AT#POP3UN="fbewm03@tiscali.fr" AT#DOMAIN="tiscali.fr" AT#SENDERADDR="fbewm03@tiscali.fr" AT#SENDERNAME="fouadtraining03" AT#SMTPPORT=25 AT#SMTPPW="fbewm03" AT#SMTPSERV="smtp.tiscali.fr" AT#SMTPUN="fben0232@tiscali.fr"
Email Management
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AT#VMAIL1 AT#CCREC1="fbewm03@tiscali.fr" AT#REC1="fbewm05@tiscali.fr" AT#SUBJ1="test message“ AT#BODY1<cr>Maximum message length is 120<ctrl-z>
AT#SENDMAIL1
AT#PUTMAIL<cr>No limit for message length<cr><lf>.<cr><lf>
AT#GETMAILEmails are automatically deleted
Email Transmission/Reception
Command
ModeIncoming
call
Command
ModeIncoming
call
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AT#VFTP AT#FTPSERV="81.80.89.163" AT#FTPPORT=21 AT#FTPUN="support-tcpip" AT#FTPPW="xbo194ar" AT#FTPTYPE=A
AT#FTPGETFILENAME="ascii1.txt" AT#FTPGETPATH="./support-tcpip/“
AT#FTPPUTFILENAME="ascii1.txt" AT#FTPPUTPATH="./support-tcpip/"
File Transfer Management
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AT#FTPPUT<file transmission><ctrl-c>
AT#FTPGET<file capture>
File Transmission/Reception
Command
ModeIncoming
call
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AT#VTCP AT#DLEMODE=1 (def.) AT#TCPPORT=23 AT#TCPTXDELAY=100 (def.)
Listener• AT#TCPSERV=“255.255.255.255”• AT#LTCPSTART
• AT#LTCPSTOP (to stop if no socket has been opened by a caller)
Caller• AT#TCPSERV=“eee.fff.ggg.hhh”• AT#OTCP<cr>The text is transmitted to remote site without echo<ctrl-c>
TCP Socket Management
Command
ModeIncoming
call
Command
ModeIncoming
call
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