Huawei Technologies Co. Ltd E870 Manuale Utente
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 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.
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.
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.
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.
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.
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.
domain Web-browsing interface. Also, it refreshes the E870 status periodically.
.