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Modem based on global mobile communication system/general grouping wireless service

A general packet radio and global mobile communication technology, applied in the field of GSM/GPRS modems, it can solve the problems of imperfect flexible networking and limited services, and achieve the effect of convenient saving or editing

Inactive Publication Date: 2008-05-07
上海科泰信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this can meet certain application requirements, it is still not perfect in terms of flexible networking
Some are not embedded in the TCP / IP protocol stack, which limits the service to terminals without the TCP / IP protocol stack

Method used

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  • Modem based on global mobile communication system/general grouping wireless service

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Embodiment approach

[0029] The present invention provides a modem based on Global System for Mobile Communications / General Packet Radio Service, which includes a main module 1, and is characterized in that it also includes an antenna interface module 2, an Ethernet interface module 3 and an asynchronous serial module respectively circuit-connected to the main module 1 interface module 4;

[0030] Described main module 1 comprises the radio frequency functional block and the baseband control module of circuit connection;

[0031] The radio frequency functional block provides equipment with two frequencies for communication with the GSM / GPRS network, conforms to the GSM / GPRS network communication standard, and supports the receiving and sending specifications of the GSM / GPRS network;

[0032] The baseband control module has the following functions:

[0033]1. Fax function: Fax via modem, in addition to saving the cost of a dedicated fax machine, you can also directly fax the files in the computer ...

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PUM

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Abstract

The invention provides a modem based on GSM (Global System for Mobile Communications) or GPRS (General Packet Radio Service), which comprises a main module. The invention is characterized in the invention also includes an antennal interface module, an Ethernet interface module, and an asynchronous serial interface module which are connected with the main module by separate circuits. The main module consists of a radio frequency function block and a baseband control module which are connected by circuits. The modem provided by the invention is based on GSM (Global System for Mobile Communications) or GPRS (General Packet Radio Service), and is inlaid with TCP or IP (Transmission Control Protocol or Internet Protocol) protocol stack inside. With the standard serial communication interface, the antennal interface and an Ethernet interface, the modem is suitable to all equipments with serial interface terminals, thus providing the terminal equipments without TCP or IP protocol processes with radio communication capability.

Description

technical field [0001] The invention mainly relates to a GSM / GPRS (Global System for Mobile Communications / General Packet Radio Service) modem with a flexible networking mode, which is mainly used in wireless data transmission services. Background technique [0002] Modem (modem) is the abbreviation of Modulator / DEModulator (modulator / demodulator). It is a device that converts digital signals into analog signals through modulation at the sending end, and converts analog signals into digital signals through demodulation at the receiving end. [0003] The information in the computer is a digital signal composed of "0" and "1", but what is transmitted on the telephone line can only be an analog electrical signal. Therefore, when two computers want to transmit data through the telephone line (such as our dial-up Internet access), a device is required to be responsible for the digital-to-analog conversion. This digital-to-analog converter is the Modem. When the computer sends ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/12H04L27/14H04L12/02
Inventor 李华刚蒋晶
Owner 上海科泰信息技术有限公司
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