Dual port wireless modem for circuit switched and packet switched data transfer

A modem and dual-port technology, applied in the field of dual-port wireless modems, can solve the problems of interrupting critical real-time communication, consuming wireless modem processing resources, etc.

Inactive Publication Date: 2005-10-05
捷迅无线公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Primarily, the channel between the wireless modem 100 and the terminal device has two incompatible modes (CSD or SMS) that may consume the processing resources of the wireless modem and disrupt critical real-time communications

Method used

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  • Dual port wireless modem for circuit switched and packet switched data transfer
  • Dual port wireless modem for circuit switched and packet switched data transfer
  • Dual port wireless modem for circuit switched and packet switched data transfer

Examples

Experimental program
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Embodiment Construction

[0024] image 3 A block diagram of a dual port external wireless modem 300 is shown. According to this embodiment, wireless modem 300 includes: a microprocessor 304; a RAM 308 for storing run-time data; a ROM 312 for storing persistent data, such as executable object code; and an RF transceiver 316, which is preferably configured to transmit and receive data in both circuit switched and packet switched modes. RAM 308 , ROM 312 , and RF transceiver 316 are communicatively coupled to microprocessor 304 .

[0025] Wireless modem 300 also includes dual port serial port 320 . According to one embodiment of the present invention, dual port serial port 320 is a multi-port RS-232 communication chip. Importantly, wireless modem 300 is configured to receive data via multiple serial ports of dual port serial port 320 simultaneously. Command and control communications between the wireless modem 300 and the end device flow through a first serial port 324 of the dual-port serial ports 3...

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Abstract

A dual port external wireless modem is disclosed. According to one embodiment, the external wireless modem receives command and control information over a primary serial port, and real-time data over a secondary serial port. The primary serial port is further configured to receive packet switched data, such as short message service messages, while the secondary serial port is configured to receive circuit switched data. An RF transceiver in the wireless modem modulates data and control received over the respective serial ports, preferably using a GSM protocol stack. According to an embodiment, the circuit switched and packet switched data received at the wireless modem can be simultaneously transmitted by the RF transceiver without interrupting the circuit switched data transfer, thereby avoiding a context switch and a loss of throughput.

Description

[0001] This application is a divisional application of the application with the filing date of September 20, 2000, the application number of 00813084.1, and the invention name of "Dual-port Wireless Modem for Circuit Switching and Packet Switching Data Transmission". technical field [0002] The present invention relates generally to wireless modems, and more particularly to a dual-port wireless modem that handles circuit-switched and packet-switched data. Background technique [0003] In existing external wireless modems, the wireless modem is configured to connect a single external device, particularly via a single serial port. When it is desired to communicate using a wireless modem, data and control signals are received via the single serial port and modulated by the wireless modem for transfer over the air interface using a wireless protocol such as GSM. [0004] E.g, figure 1 A known external wireless modem 100 is shown. The wireless modem 100 includes: a microproces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M11/00H04L12/28H04L12/56
CPCH04W88/00H04W28/14H04W80/00
Inventor 丹尼尔·门罗查尔斯·林赛
Owner 捷迅无线公司
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