The following procedure is an example of how to use the test set for IP packet data transfer. This example uses the test set's internal PDSN simulation to provide simple IP protocol. In this case, the test set is responsible for actual termination of the PPP link and propagating the encapsulated IP packets directly to the ethernet interface (LAN port).
The following procedure will demonstrate how to access this web site via the RF interface using a 1xEV-DO access terminal (AT) as a wireless modem. The AT will be connected to the USB port on a laptop computer (PC) running USB port software developed by the manufacturer of the access terminal. The Wireless Protocol Advisor (WPA) can be used for logging the protocol messages during the packet data transfer. See HTTP Functional Test for a typical connection.
The purpose of this procedure is to serve as an overview of the tasks required for a typical data channel application. If your particular application involves accessing internet or intranet sites via the test set's LAN interface, additional requirements such as getting through corporate firewalls may complicate setup procedures.
If you want to test data applications using mobile IP protocol, see Packet Data Service Example Procedure (via Mobile IP)
Install the USB and modem drivers provided by the wireless modem manufacturer. Connect the USB port from the wireless modem to the PC. When run for the first time, the software prompts the user for setup information. When properly configured, the PC will recognize the wireless modem on the USB (or other) port.
The laptop has to be configured to include the wireless modem in its list of networks. The network dial-up connection properties must be configured according to the requirements of the wireless modem and the data port driver (NOTE: Most access terminals require the dialed number to be #777). When the PC is properly configured, the "Network and Dial-up Connections menu" should include the wireless modem in its list of connections.
In this example, on the PC running the Windows 2000, select the Network and Dialup Connections from the Control Panel. Select Local Area Connection icon, right click, and select Disable. Then select the Make New Connection icon, set up an internet connection with the new added modem (the connection is named as "Wireless Modem", for example).
There are many different configurations for testing wireless modems (or other wireless appliances such as WAP enabled access terminals) data handling performance. See HTTP Functional Test for a diagram of the connection used for this example.
Instrument Setup( F1 ) key.
LAN IP Addressto
Default Gatewayto be blank (enter a 0 to make it blank)
LAN IP Address 2 (Data+)to
188.8.131.52(Note that the
LAN IP Address 2 (Data+)must be set properly if the test set has the LAN 2 Port.)
LAN IP Address,
LAN IP Address 2 (Data+)depend on your local network that the test set is connected to. You should work with your IT department for proper IP settings.
Set up data channel parameters required for the packet data connection (see How Do I Set Up Data Channel Parameters? for a general procedure).
Data Channel Info( F2 on Call Control 3 of 3).
Data Channel Parameters( F1 ).
DUT IP Address(for example, 184.108.40.206).
External PDSN Stateis set to
Off(Indicating using test set's internal PDSN).
Now, the test set setup are ready for a dial-up connection from the PC.
Session Openin the Active Cell status field and the access terminal information shown on the Call Setup screen. See B. Open a Session .
Open the browser on the PC (for example, Internet Explorer). Enter the test set's IP address on the address area of the PC's browser (in this example, http://220.127.116.11). The PC browser should display the test set's internal web server page:
Get Image, the current screen on your test set's front panel will be displayed on your browser. As data is transferred, monitor the Data Counters (see Data Counters ). or the Data Throughput Monitor window (see Data Throughput Monitor ) from the test set. You can see the data rate variation during the data transfer. To evaluate the effects of the RF degradation on the data rate, you can adjust the Cell power or add an AWGN (Additive White Gaussian Noise) power. The data rate changes can be easily identified from the Traffic Channel Packet Information screen.