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Huawei Technologies Co. Ltd E870 ユーザーズマニュアル

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HUAWEI E870 HSPA Data Card V100R001
Product Description
 
Issue 03 (2007-08-13) 
Commercial in Confidence 
Page 18 of 25
 
4.2 Functional Modules 
Radio Frequency (RF) Module 
It sends/receives radio signals and modulates/demodulates between RF signals and 
baseband signals. 
Baseband Signal Processing 
It processes HSDPA/WCDMA/EDGE/GPRS/GSM baseband digital signals, including: 
Modulate/Demodulate HSDPA/WCDMA baseband, Modulate/Demodulate 
EDGE/GPRS/GSM baseband, Encode/Decode HSDPA/WCDMA channel, 
Encode/Decode EDGE/GPRS/GSM channel. 
Bottom Layer Driver 
It drives peripherals and implements the Plug&Play function. Peripherals include 
universal serial bus (USB), LED and SIM/USIM. 
Platform Service Subsystem 
It initializes programs, diagnoses, downloads data and serves as a watchdog. 
Protocol Stack System 
It processes Layer 2 and Layer 3 protocols of HSDPA/WCDMA/GSM/GPRS/EDGE. 
Application System 
It sends laptop commands to the bottom layer protocol for processing and returns the 
value to the laptop. Current application includes call management, message 
management, and CS/PS domain service management. 
User Interface 
It provides interfaces to connect peripherals. Interfaces are for LED, SIM/USIM, and 
external antenna. 
Express Card USB 
It provides the USB interface as defined in the ExpressCard Standard. USB driver 
function is realized on a laptop. The functions help exchange information between the 
dashboard and the E870. 
Application Management 
It realizes the message sending/receiving function on a laptop. It provides the CS/PS 
domain Web-browsing interface. Also, it refreshes the E870 status periodically. 
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